Batroxobin
A proteolytic enzyme obtained from the venom of fer-de-lance (Bothrops atrox). It is used as a plasma clotting agent for fibrinogen and for the detection of fibrinogen degradation products. The presence of heparin does not interfere with the clotting test. Hemocoagulase is a mixture containing batroxobin and factor X activator. EC 3.4.21.-.
Calcium Gluconate
Crotalid Venoms
Venoms from snakes of the subfamily Crotalinae or pit vipers, found mostly in the Americas. They include the rattlesnake, cottonmouth, fer-de-lance, bushmaster, and American copperhead. Their venoms contain nontoxic proteins, cardio-, hemo-, cyto-, and neurotoxins, and many enzymes, especially phospholipases A. Many of the toxins have been characterized.
Fibrinopeptide A
Two small peptide chains removed from the N-terminal segment of the alpha chains of fibrinogen by the action of thrombin during the blood coagulation process. Each peptide chain contains 18 amino acid residues. In vivo, fibrinopeptide A is used as a marker to determine the rate of conversion of fibrinogen to fibrin by thrombin.
Bothrops
Encyclopedias as Topic
Erythrocyte Aggregation
The formation of clumps of RED BLOOD CELLS under low or non-flow conditions, resulting from the attraction forces between the red blood cells. The cells adhere to each other in rouleaux aggregates. Slight mechanical force, such as occurs in the circulation, is enough to disperse these aggregates. Stronger or weaker than normal aggregation may result from a variety of effects in the ERYTHROCYTE MEMBRANE or in BLOOD PLASMA. The degree of aggregation is affected by ERYTHROCYTE DEFORMABILITY, erythrocyte membrane sialylation, masking of negative surface charge by plasma proteins, etc. BLOOD VISCOSITY and the ERYTHROCYTE SEDIMENTATION RATE are affected by the amount of erythrocyte aggregation and are parameters used to measure the aggregation.
Erythrocytes
Platelet Aggregation
Cerebral Infarction
The formation of an area of NECROSIS in the CEREBRUM caused by an insufficiency of arterial or venous blood flow. Infarcts of the cerebrum are generally classified by hemisphere (i.e., left vs. right), lobe (e.g., frontal lobe infarction), arterial distribution (e.g., INFARCTION, ANTERIOR CEREBRAL ARTERY), and etiology (e.g., embolic infarction).
Erythrocyte Membrane
Thiocapsa roseopersicina
Microfluidic Analytical Techniques
Erythrocyte Volume
Cell Wall
Centrifugation, Density Gradient
Pancreatic Elastase
Leukocyte Elastase
Enzymes
Terminology as Topic
Databases, Protein
Cathepsin G
alpha 1-Antitrypsin
Lung Volume Measurements
Lung
Bioelectric Energy Sources
Pulmonary Alveoli
Pulmonary Emphysema
Snake Venoms
Heparin
A highly acidic mucopolysaccharide formed of equal parts of sulfated D-glucosamine and D-glucuronic acid with sulfaminic bridges. The molecular weight ranges from six to twenty thousand. Heparin occurs in and is obtained from liver, lung, mast cells, etc., of vertebrates. Its function is unknown, but it is used to prevent blood clotting in vivo and vitro, in the form of many different salts.
Blood Coagulation
Spiro Compounds
Asia, Southeastern
Developmental Biology
Accounts Payable and Receivable
Portraits as Topic
T-Phages
A series of 7 virulent phages which infect E. coli. The T-even phages T2, T4; (BACTERIOPHAGE T4), and T6, and the phage T5 are called "autonomously virulent" because they cause cessation of all bacterial metabolism on infection. Phages T1, T3; (BACTERIOPHAGE T3), and T7; (BACTERIOPHAGE T7) are called "dependent virulent" because they depend on continued bacterial metabolism during the lytic cycle. The T-even phages contain 5-hydroxymethylcytosine in place of ordinary cytosine in their DNA.
Snake Bites
Viper Venoms
Venoms from SNAKES of the viperid family. They tend to be less toxic than elapid or hydrophid venoms and act mainly on the vascular system, interfering with coagulation and capillary membrane integrity and are highly cytotoxic. They contain large amounts of several enzymes, other factors, and some toxins.
Drug Information Services
Thailand
Universal Precautions
Hong Kong
The former British crown colony located off the southeast coast of China, comprised of Hong Kong Island, Kowloon Peninsula, and New Territories. The three sites were ceded to the British by the Chinese respectively in 1841, 1860, and 1898. Hong Kong reverted to China in July 1997. The name represents the Cantonese pronunciation of the Chinese xianggang, fragrant port, from xiang, perfume and gang, port or harbor, with reference to its currents sweetened by fresh water from a river west of it.
Internet
The contribution of residues 192 and 193 to the specificity of snake venom serine proteinases. (1/50)
Snake venom serine proteinases, which belong to the subfamily of trypsin-like serine proteinases, exhibit a high degree of sequence identity (60-66%). Their stringent macromolecular substrate specificity contrasts with that of the less specific enzyme trypsin. One of them, the plasminogen activator from Trimeresurus stejnegeri venom (TSV-PA), which shares 63% sequence identity with batroxobin, a fibrinogen clotting enzyme from Bothrops atrox venom, specifically activates plasminogen to plasmin like tissue-type plasminogen activator (t-PA), even though it exhibits only 23% sequence identity with t-PA. This study shows that TSV-PA, t-PA, and batroxobin are quite different in their specificity toward small chromogenic substrates, TSV-PA being less selective than t-PA, and batroxobin not being efficient at all. The specificity of TSV-PA, with respect to t-PA and batroxobin, was investigated further by site-directed mutagenesis in the 189-195 segment, which forms the basement of the S(1) pocket of TSV-PA and presents a His at position 192 and a unique Phe at position 193. This study demonstrates that Phe(193) plays a more significant role than His(192) in determining substrate specificity and inhibition resistance. Interestingly, the TSV-PA variant F193G possesses a 8-9-fold increased activity for plasminogen and becomes sensitive to bovine pancreatic trypsin inhibitor. (+info)Prevention of rat cerebral aneurysm formation by inhibition of nitric oxide synthase. (2/50)
BACKGROUND: Cerebral saccular aneurysm is a major cause of subarachnoid hemorrhage, one of the cerebrovascular diseases with the highest mortality. The mechanisms underlying the development of aneurysms, however, still remain unclear. We have made a series of reports on an animal model of experimentally induced cerebral aneurysms that resemble human cerebral aneurysms in their location and morphology, suggesting that the arterial wall degeneration associated with aneurysm formation develops near the apex of arterial bifurcation as a result of an increase in wall shear stress. Using the animal model and human specimens, we examined the role of nitric oxide (NO) in the degenerative changes and cerebral aneurysm formation. METHODS AND RESULTS: Inducible NO synthase (iNOS) was immunohistochemically located at the orifice of human and rat aneurysms. Nitrotyrosine distribution was also seen in the human aneurysm. Although no iNOS immunostaining was found in normal arteries, iNOS immunoreactivity was observed in parallel with the development of early aneurysmal changes in rats. In contrast, during the early development of aneurysm, endothelial NOS immunostaining in the endothelium was weakened compared with that in the control arteries. An NOS inhibitor, aminoguanidine, attenuated both early aneurysmal changes and the incidence of induced aneurysms. A defibrinogenic agent, batroxobin, which may diminish shear stress by reduction of blood viscosity, prevented iNOS induction as well as early aneurysmal changes. CONCLUSIONS: The evidence suggests that NO, particularly that derived from iNOS, is a key requirement for the development of cerebral aneurysm. The iNOS induction may be caused by an increase in shear stress near the apex. (+info)Effect of batroxobin against dog heart ischemia/reperfusion injury. (3/50)
AIM: To study the effect of batroxobin(Bat) on dog heart ischemia/reperfusion (I/R) injury. METHODS: Dog heart I/R injury was induced by occluding the left anterior descending coronary artery for 30 min and restoring blood perfusion for 90 min. Bat was intravenously injected before heart ischemia and 15 min before reperfusion. Plasma creatine kinase (CK), lactate dehydrogenase (LDH), and myocardial malondiaedehyde (MDA) concentrations were measured. The pathologic changes of I/R myocardium were observed. RESULTS: Bat reduced the mortality rate of I/R dog (I/R group 65.0% vs Bat-I group 30.0% and Bat-II group 28.6%, P < 0.05). Myocytes of I/R heart showed intracellular edema, damaged mitochondria, and concentrated nucleus. Bat decreased these changes. In Bat-I and Bat-II group, plasma CK and LDH level were reduced, the +dp/dtmax and -dp/dtmax at 30 min after ischemia and 90 min after reperfusion were elevated, and left ventricular end dilation pressure (LVEDP) was lowered. The myocardial MDA contents were decreased by 42.3% and 38.1% (P < 0.01) in Bat-I and Bat-II group, respectively. CONCLUSION: Bat may exert an apparent role against dog heart ischemia/reperfusion injury and improve myocardial function. (+info)Influence of batroxobin on cerebral ischemia-reperfusion injury in gerbils. (4/50)
AIM: To study the effects of batroxobin (Bat) on neurons survival, neurobehavioral test, ATP levels and hydroxyl radical outputs in hippocampus during forebrain ischemia-reperfusion in gerbils. METHODS: The forebrain ischemia was induced by occluding the bilateral common carotid arteries for 10 min in gerbils, and ATP levels and 2, 3-dihydroxybenzoic acid (DHBA) outputs were assayed by HPLC. The neurons survival were assessed by histology, and behavioral tests of gerbils were assessed by open field test. RESULTS: The number of neurons survival in Ir at d 7 postischemic insult were (7 +/- 4)% of sham-operated gerbils, much less than that in Bat (45 +/- 16)%. The levels of explore activities of ischemic gerbils was 175% and 159% of sham-operated gerbils at d 3 and d 6 postischemic insult, much more than that in Bat (120% d 3 and 140% d 6). Hippocampal ATP levels in Ir were 64% of sham-operated gerbils at reperfusion 60 min, much less than that in Bat I and II (82% and 89% respectively). The hippocampal 2,3-DHBA outputs in Ir increased by 4.5 folds of sham-operated gerbils at reperfusion 60 min, but the 2,3-DHBA outputs in Bat I and Bat II were only 2.6 and 2.4 folds respectively. CONCLUSION: Bat possesses the inhibitory effects on DND and OH. production following cerebral ischemia-reperfusion in gerbils. (+info)GAP-43 expression and pathological changes of temporal infarction in rats and effects of batroxobin. (5/50)
To study the changes of the expression of growth-associated protein-43 (GAP-43) and pathology in temporal infarction of rats photochemically induced and the effects of batroxobin. METHODS: Immunohistochemical technique and hematoxylin-eosin stain was used to show the changes of the expression of GAP-43 and pathology. RESULTS: In infarction group, GAP-43 expression was markedly increased on the infarction and surrounding tissues at 24 h cerebral infarction. The expression reached peak level at 72 h after cerebral infarction and was decreased at 7 d after cerebral infarction. However, in batroxobin-treated group, GAP-43 expression was increased and the pathological changes were much slight as compared with infarction group. CONCLUSION: The expression of GAP-43 increases in infarction of temporal neocortex and batroxobin promotes the expression of GAP-43 and ameliorates the pathological changes in infarction of temporal neocortex. (+info)Recombinant BbetaArg14His fibrinogen implies participation of N-terminus of Bbeta chain in desA fibrin polymerization. (6/50)
We synthesized BbetaArg14His fibrinogen with histidine substituted for arginine at the Bbeta thrombin-cleavage site. This substitution led to a 300-fold decrease in the rate of thrombin-catalyzed fibrinopeptide B (FpB, Bbeta 1-14) release, whereas the rate of FpA release was normal with either thrombin or the FpA-specific enzyme, batroxobin. Both thrombin- and batroxobincatalyzed polymerization of BbetaArg14His fibrinogen were significantly impaired, with a longer lag time, slower rate of lateral aggregation, and decreased final turbidity. Moreover, desA monomer polymerization was similarly impaired, demonstrating that the histidine substitution itself, and not the lack of FpB cleavage, caused the abnormal polymerization of BbetaArg14His fibrin. Scanning electron microscopy showed BbetaArg14His fibrin fibers were thinner than normal (BbetaArg14His, approximately 70 nm; normal, approximately 100 nm; P <.0001), as expected from the decreased final turbidity. We conclude that the N-terminus of the Bbeta chain is involved in the lateral aggregation of normal desAprotofibrils and that the Arg-->His substitution disrupts these interactions in BbetaArg14His fibrinogen. (+info)Thrombolytic actions of reptilase. (7/50)
In thrombolytic model in vitro, reptilase (Rep, defibrase) did not show appreciable thrombolytic actions on red and white thrombi. After daily iv infusion of Rep 0.25 IU for 10 d, the time of 50% lysis of euglobulin (ELT1/2) was shortened from 9.3 +/- 0.8 to 6.7 +/- 1.0 h (P < 0.01), alteplase activity was increased from 1.9 +/- 0.7 to 3.7 +/- 0.9 IU.ml-1, and plasminogen inactivator (PI) activity reduced from 4.3 +/- 0.6 to 1.8 +/- 0.9 AU.ml-1 (all P < 0.01). The findings indicate that the thrombolytic action of Rep shown in vivo may not be from the direct action on thrombi but from the influence on alteplase and PI activity. (+info)Detection of soluble intermediates of the fibrinogen-fibrin conversion using erythrocytes coated with fibrin monomers. (8/50)
The presence of minimal amounts of fibrinogen-fibrin intermediates in human plasma was visualized by an agglutination reaction of glutaraldehyde-treated human erythrocytes coated with purified fibrin monomers. A degree of monomer coating was established which produced erythrocytes not agglutinated by normal plasma but by plasma containing minimal amounts of soluble complexes of fibrinogen with fibrin monomers. Under standardized conditions of coating, erythrocyte concentration, temperature, pH, and incubation time, the agglutination time varied with the ratio of soluble fibrin to fibrinogen in plasma. The test was sensitive down to a soluble fibrin concentration of 0.675% of the plasma fibrinogen concentration. Early fibrinogen and fibrin degradation products (FDP) in the plasma led to a prolongation of the agglutination time at a concentration of more than 16 mg/100 ml. Late FDP in a concentration of 100 mg/100 ml did not convert a positive test to negative. The test was not affected by heparin and protamine at concentrations of up to 12.5 and 50 NIH units/ml, respectively. (+info)
Batroxobin - Wikipedia
Effect of single intravenous administration of batroxobin on erythrocyte aggregability in patients with acute-stage cerebral...
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Effects of fibrinogen derivatives upon the inflammatory response. Studies with human fibrinopeptide B.
JCI -
Usage information: Effects of fibrinogen derivatives upon the inflammatory response. Studies with human fibrinopeptide B.
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Agkistrodon contortrix image
Agkistrodon contortrix image
Venombin A
Alternatively, batroxobin is also used as a topical hemostatic by its rapid local clot-expansion action. Nolan C, Hall LS, ... Itoh N, Tanaka N, Funakoshi I, Kawasaki T, Mihashi S, Yamashina I (June 1988). "Organization of the gene for batroxobin, a ... Vu, TT; Stafford, AR; Leslie, BA; Kim, PY; Fredenburgh, JC; Weitz, JI (7 June 2013). "Batroxobin binds fibrin with higher ... Examples include ancrod and batroxobin, two serine proteases from snakes that have been used in medical preparations. Venombin ...
Thrombin time
Batroxobin has a similar action to thrombin but unlike thrombin it is not inhibited by heparin. Normal values for thrombin time ... If batroxobin is used, the time should be between 15 and 20 seconds. Thrombin time can be prolonged by heparin, fibrin ... In blood samples containing heparin, a substance derived from snake venom called batroxobin (formerly reptilase) is used ...
Ancrod
Batroxobin, another medical snake venom serine protease ""Eye On" report: Neurobiological Technologies, Inc" (PDF). Prohost ...
Anticoagulant
Batroxobin, a toxin from a snake venom, clots platelet-rich plasma without affecting platelet functions (lyses fibrinogen). ...
Venoms in medicine
Batroxobin from B atrox is used as a drug called "Reptilase" that is used to stop bleeding, while batroxobin from B moojeni is ... Batroxobin, is a serine protease found in snake venom produced by Bothrops atrox and Bothrops moojeni, venomous species of pit ... It is also used in a system called "Vivostat", where a person's blood is taken just before surgery and exposed to batroxobin; ...
ATC code B02
Coagulation factor X B02BD14 Susoctocog alfa B02BD30 Thrombin B02BX01 Etamsylate B02BX02 Carbazochrome B02BX03 Batroxobin ...
Bothrops atrox
... batroxobin), derived from this snake's venom, is used in modern medical laboratories to measure fibrinogen levels and blood ...
List of MeSH codes (D08)
... batroxobin MeSH D08.811.277.656.300.775 - streptokinase MeSH D08.811.277.656.300.775.075 - anistreplase MeSH D08.811.277.656. ...
List of MeSH codes (D20)
... batroxobin MeSH D20.888.850.960.200.210 - crotoxin MeSH D20.944.380 - hazardous waste MeSH D20.944.380.638 - radioactive waste ...
List of MeSH codes (D23)
... batroxobin MeSH D23.946.833.850.960.200.210 - crotoxin MeSH D23.946.896.980 - virulence factors, bordetella MeSH D23.946. ...
List of drugs: Ba
Batroxobin (INN) Bavisant (INN, (USAN) Bavituximab (USAN, INN) Baxitozine (INN) Baycol BayGam BayHep B Baypress BayRab BayTet ...
Batroxobin
... also has a high Kd value for binding both forms yA/yA and yA/y'. The bindings sites of batroxobin and thrombin ... The venom batroxobin also induces clots, but does this with or without tissue damage. This is because batroxobin isn't ... Batroxobin is excreted by the liver, kidney and spleen. The excretion of batroxobin can be detected by small metabolite ... Batroxobin is a protein of the serine protease family. Batroxobin is closely related in physiological function and molecular ...
Factor X
... a is the activated form of the coagulation factor thrombokinase, known eponymously as Stuart-Prower factor. Factor X is an enzyme, a serine endopeptidase, which plays a key role at several stages of the coagulation system. Factor X is synthesized in the liver. The most commonly used anticoagulants in clinical practice, warfarin and the heparin series of anticoagulants and fondaparinux, act to inhibit the action of Factor Xa in various degrees. Traditional models of coagulation developed in the 1960s envisaged two separate cascades, the extrinsic (tissue factor (TF)) pathway and the intrinsic pathway. These pathways converge to a common point, the formation of the Factor Xa/Va complex which together with calcium and bound on a phospholipids surface generate thrombin (Factor IIa) from prothrombin (Factor II). A new model, the cell-based model of anticoagulation appears to explain more fully the steps in coagulation. This model has three stages: 1) initiation of coagulation on TF-bearing ...
Cinchonism
Symptoms of mild cinchonism (which may occur from standard therapeutic doses of quinine) include flushed and sweaty skin, ringing of the ears (tinnitus), blurred vision, impaired hearing, confusion, reversible high-frequency hearing loss, headache, abdominal pain, rashes, drug-induced lichenoid reaction (lichenoid photosensitivity),[1] vertigo, dizziness, dysphoria, nausea, vomiting and diarrhea. Large doses of quinine may lead to severe (but reversible) symptoms of cinchonism: skin rashes, deafness, somnolence, diminished visual acuity or blindness, anaphylactic shock, and disturbances in heart rhythm or conduction, and death from cardiotoxicity (damage to the heart). Quinine may also trigger a rare form of hypersensitivity reaction in malaria patients, termed blackwater fever, that results in massive hemolysis, hemoglobinemia, hemoglobinuria, and kidney failure.[citation needed] Most symptoms of cinchonism (except in severe cases) are reversible and disappear once quinine is withdrawn. ...
Complement component 1s
Luo C, Thielens NM, Gagnon J, Gal P, Sarvari M, Tseng Y, Tosi M, Zavodszky P, Arlaud GJ, Schumaker VN (May 1992). "Recombinant human complement subcomponent C1s lacking beta-hydroxyasparagine, sialic acid, and one of its two carbohydrate chains still reassembles with C1q and C1r to form a functional C1 complex". Biochemistry. 31 (17): 4254-62. doi:10.1021/bi00132a015. PMID 1533159 ...
Alcohol
In other less formal contexts, an alcohol is often called with the name of the corresponding alkyl group followed by the word "alcohol", e.g., methyl alcohol, ethyl alcohol. Propyl alcohol may be n-propyl alcohol or isopropyl alcohol, depending on whether the hydroxyl group is bonded to the end or middle carbon on the straight propane chain. As described under systematic naming, if another group on the molecule takes priority, the alcohol moiety is often indicated using the "hydroxy-" prefix.[17] Alcohols are then classified into primary, secondary (sec-, s-), and tertiary (tert-, t-), based upon the number of carbon atoms connected to the carbon atom that bears the hydroxyl functional group. (The respective numeric shorthands 1°, 2°, and 3° are also sometimes used in informal settings.[18]) The primary alcohols have general formulas RCH2OH. The simplest primary alcohol is methanol (CH3OH), for which R=H, and the next is ethanol, for which R=CH3, the methyl group. Secondary alcohols are those ...
Poisoning
... is a condition or a process in which an organism becomes chemically harmed severely (poisoned) by a toxic substance or venom of an animal.[1] Acute poisoning is exposure to a poison on one occasion or during a short period of time. Symptoms develop in close relation to the degree of exposure. Absorption of a poison is necessary for systemic poisoning (that is, in the blood throughout the body). In contrast, substances that destroy tissue but do not absorb, such as lye, are classified as corrosives rather than poisons. Furthermore, many common household medications are not labeled with skull and crossbones, although they can cause severe illness or even death. In the medical sense, toxicity and poisoning can be caused by less dangerous substances than those legally classified as a poison. Toxicology is the study and practice of the symptoms, mechanisms, diagnosis, and treatment of poisoning. Chronic poisoning is long-term repeated or continuous exposure to a poison where symptoms do not ...
Tranexamic acid
... (TXA) is a medication used to treat or prevent excessive blood loss from major trauma, post partum bleeding, surgery, tooth removal, nose bleeds, and heavy menstruation.[1][2] It is also used for hereditary angioedema.[1][3] It is taken either by mouth or injection into a vein.[1]. Side effects are rare.[3] Some include changes in color vision, blood clots and allergic reactions.[3] Greater caution is recommended in people with kidney disease.[4] Tranexamic appears to be safe for use during pregnancy and breastfeeding.[3][5] Tranexamic acid is in the antifibrinolytic family of medications.[4]. Tranexamic acid was discovered in 1962 by Utako Okamoto.[6] It is on the World Health Organization's List of Essential Medicines, the most effective and safe medicines needed in a health system.[7] Tranexamic acid is available as a generic medication.[8] The wholesale cost in the developing world is about 4.38 to 4.89 USD for a course of treatment.[9] In the United States a course of ...
Category:EC 3.4.21
Text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc., a non-profit organization ...
Toxicity
... can be measured by its effects on the target (organism, organ, tissue or cell). Because individuals typically have different levels of response to the same dose of a toxic substance, a population-level measure of toxicity is often used which relates the probabilities of an outcome for a given individual in a population. One such measure is the LD50. When such data does not exist, estimates are made by comparison to known similar toxic things, or to similar exposures in similar organisms. Then, "safety factors" are added to account for uncertainties in data and evaluation processes. For example, if a dose of a toxic substance is safe for a laboratory rat, one might assume that one tenth that dose would be safe for a human, allowing a safety factor of 10 to allow for interspecies differences between two mammals; if the data are from fish, one might use a factor of 100 to account for the greater difference between two chordate classes (fish and mammals). Similarly, an extra protection ...
Drug overdose
More than 64,000 Americans died from drug overdoses in 2016.[1] Since 2000, the US drug overdose death rate has gone from 6.2 per 100,000 people in 2000 to 14.7 per 100,000 in 2014.[17] The National Center for Health Statistics report that 19,250 people died of accidental poisoning in the U.S. in the year 2004 (8 deaths per 100,000 population).[18] In 2008 testimony before a Senate subcommittee, Leonard J. Paulozzi,[19] a medical epidemiologist at the Centers for Disease Control and Prevention stated that in 2005 more than 22,000 American lives were lost due to overdoses, and the number is growing rapidly. Paulozzi also testified that all available evidence suggests that unintentional overdose deaths are related to the increasing use of prescription drugs, especially opioid painkillers.[20] However, the vast majority of overdoses are also attributable to alcohol. It is very rare for a victim of an overdose to have consumed just one drug. Most overdoses occur when drugs are ingested in ...
HtrA serine peptidase 2
Protein HtrA2, also known as Omi, is a mitochondrially-located serine protease. The human protein Serine protease HTRA2, mitochondrial is 49kDa in size and composed of 458 amino acids. The peptide fragment of 1-31 amino acid is the mitochondrial transition sequence, fragment 32-133 amino acid is propertied, and 134-458 is the mature protein Serine protease HTRA2, mitochondrial, and its theoretical pI of this protein is 6.12.[10] HtrA2 shows similarities with DegS, a bacterial protease present in the periplasm of gram-negative bacteria. Structurally, HtrA2 is a trimeric molecule with central protease domains and a carboxy-terminal PDZ domain, which is characteristic of the HtrA family. The PDZ domain preferentially binds C-terminus of the protein substrate and modulate the proteolytic activity of the trypsin-like protease domain.[11] ...
Poison
In biology, poisons are substances that cause disturbances in organisms, usually by chemical reaction or other activity on the molecular scale, when an organism absorbs a sufficient quantity.[1][2] The fields of medicine (particularly veterinary) and zoology often distinguish a poison from a toxin, and from a venom. Toxins are poisons produced by organisms in nature, and venoms are toxins injected by a bite or sting (this is exclusive to animals). The difference between venom and other poisons is the delivery method. Industry, agriculture, and other sectors employ poisonous substances for reasons other than their toxicity. Most poisonous industrial compounds have associated material safety data sheets and are classed as hazardous substances. Hazardous substances are subject to extensive regulation on production, procurement and use in overlapping domains of occupational safety and health, public health, drinking water quality standards, air pollution and environmental protection. Due to the ...
Peptidase Do
Seol JH, Woo SK, Jung EM, Yoo SJ, Lee CS, Kim KJ, Tanaka K, Ichihara A, Ha DB, Chung CH (April 1991). "Protease Do is essential for survival of Escherichia coli at high temperatures: its identity with the htrA gene product". Biochemical and Biophysical Research Communications. 176 (2): 730-6. doi:10.1016/s0006-291x(05)80245-1. PMID 2025286 ...
Tick paralysis
... is believed to be due to toxins found in the tick's saliva that enter the bloodstream while the tick is feeding. The two ticks most commonly associated with North American tick paralysis are the Rocky Mountain wood tick (Dermacentor andersoni) and the American dog tick (Dermacentor variabilis); however, 43 tick species have been implicated in human disease around the world.[1] Most North American cases of tick paralysis occur from April to June, when adult Dermacentor ticks emerge from hibernation and actively seek hosts.[2] In Australia, tick paralysis is caused by the tick Ixodes holocyclus. Prior to 1989, 20 fatal cases were reported in Australia.[3] Although tick paralysis is of concern in domestic animals and livestock in the United States as well, human cases are rare and usually occur in children under the age of 10. Tick paralysis occurs when an engorged and gravid (egg-laden) female tick produces a neurotoxin in its salivary glands and transmits it to its host during ...
Shellfish poisoning
... includes four (4) syndromes that share some common features and are primarily associated with bivalve molluscs (such as mussels, clams, oysters and scallops.)[1] These shellfish are filter feeders and, therefore, accumulate toxins produced by microscopic algae, such as cyanobacteria, diatoms and dinoflagellates. ...
Diarrhetic shellfish poisoning
... (DSP) is one of the four recognized symptom types of shellfish poisoning, the others being paralytic shellfish poisoning, neurotoxic shellfish poisoning and amnesic shellfish poisoning. As the name suggests, this syndrome manifests itself as intense diarrhea and severe abdominal pains. Nausea and vomiting may sometimes occur too. DSP and its symptoms usually set in within about half an hour of ingesting infected shellfish, and last for about one day. A recent case in France, though, with 20 people consuming oysters manifested itself after 36 hours. The causative poison is okadaic acid, which inhibits intestinal cellular de-phosphorylation.[1] This causes the cells to become very permeable to water and causes profuse, intense diarrhea with a high risk of dehydration. As no life-threatening symptoms generally emerge from this, no fatalities from DSP have ever been recorded. ...
Trypsin inhibitor
A trypsin inhibitor (TI) is a protein and a type of serine protease inhibitor (serpin) that reduces the biological activity of trypsin by controlling the activation and catalytic reactions of proteins.[1] Trypsin is an enzyme involved in the breakdown of many different proteins, primarily as part of digestion in humans and other animals such as monogastrics and young ruminants. When trypsin inhibitor is consumed it acts as an irreversible and competitive substrate.[2] It competes with proteins to bind to trypsin and therefore renders it unavailable to bind with proteins for the digestion process.[1] As a result, protease inhibitors that interfere with digestion activity have an antinutritional effect. Therefore, trypsin inhibitor is considered an anti-nutritional factor or ANF.[3] Additionally, trypsin inhibitor partially interferes with chymotrypsin function. Trypsinogen is an inactive form of trypsin, its inactive form ensures protein aspects of the body, such as the pancreas and muscles, are ...
Zinc toxicity
Zinc has been used therapeutically at a dose of 150 mg/day for months and in some cases for years, and in one case at a dose of up to 2000 mg/day zinc for months.[7][8][9][10][11] A decrease in copper levels and hematological changes have been reported; however, those changes were completely reversed with the cessation of zinc intake.[9] However, zinc has been used as zinc gluconate and zinc acetate lozenges for treating the common cold[12] and therefore the safety of usage at about 100 mg/day level is a relevant question. Thus, given that doses of over 150 mg/day for months to years has caused no permanent harm in many cases, a one-week usage of about 100 mg/day of zinc in the form of lozenges would not be expected to cause serious or irreversible adverse health issues in most persons. Unlike iron, the elimination of zinc is concentration-dependent.[13] ...
Recombinant factor VIIa
As of 2012, rFVIIa is not supported by the evidence for treating most cases of major bleeding.[1] There is a significant risk of arterial thrombosis with its use and thus, other than in those with factor VII deficiency, it should only be given in clinical trials.[1] Recombinant human factor VII, while initially looking promising in intracerebral hemorrhage, failed to show benefit following further study and is no longer recommended.[2][3] In people with hemophilia type A and B who have a deficiency of factors VIII and IX, these two factors are administered for controlling bleeding or as prophylaxis medication before starting surgeries. However, in some cases they subsequently develop neutralizing antibodies, called inhibitors, against the drug. These inhibitors often increase over time and inhibit the action of coagulation in the body. rFVIIa, which is an activated form of factor VII, bypasses factors VIII and IX and causes coagulation without the need for factors VIII and IX. It can't be given ...
Batroxobin - Wikipedia
Batroxobin also has a high Kd value for binding both forms yA/yA and yA/y. The bindings sites of batroxobin and thrombin ... The venom batroxobin also induces clots, but does this with or without tissue damage. This is because batroxobin isnt ... Batroxobin is excreted by the liver, kidney and spleen. The excretion of batroxobin can be detected by small metabolite ... Batroxobin is a protein of the serine protease family. Batroxobin is closely related in physiological function and molecular ...
Anti-Batroxobin Rabbit Polyclonal Antibody | VWR
Effect of single intravenous administration of batroxobin on erythrocyte aggregability in patients with acute-stage cerebral...
The fibrinogen concentrations before, and at 1, 2, and 7 days after the batroxobin were 364±81 mg/dl, 150±35 mg/dl (41%, P,0.01 ... The fibrinogen concentrations before, and at 1, 2, and 7 days after the batroxobin were 318±57 mg/dl, 255±60 mg/dl (80%, P,0.01 ... The fibrinogen concentrations before, and at 1, 2, and 7 days after the batroxobin were 364±81 mg/dl, 150±35 mg/dl (41%, P,0.01 ... The fibrinogen concentrations before, and at 1, 2, and 7 days after the batroxobin were 318±57 mg/dl, 255±60 mg/dl (80%, P,0.01 ...
Patent US6027655 - Apparatus and method for centrifugally separating blood and then forming a ... - Google Patents
The separation of the fibrin monomer from the Batroxobin in a liquid 100 produced in the second chamber 34 through the action ... 1-10 can be omitted as the chemical or biochemical agent, e.g., Batroxobin immobilized in Aqarose gel, is provided in a ... After the extraction of Fibrin from the plasma, conversion of Fibrin into Fibrin 1, and linking of Fibrin 1 to Batroxobin, the ... As the plasma which is transferred from the first chamber 32 to the second chamber 34 is contacted with the Batroxobin ...
Fibrin Modulating Agents - DrugBank
Aminosalicylic Acid - DrugBank
Serine protease
Pancreatic elastase
Browsing by Subject
Cerebral Sinus - Trip Database
Batroxobin in combination with anticoagulation may promote venous sinus recanalization in cerebral venous thrombosis: A real- ... 4. Batroxobin in combination with anticoagulation may promote venous sinus recanalization in cerebral venous thrombosis: A real ... who underwent batroxobin treatment in combination with anticoagulation.A total of 31 CVT patients were enrolled in this real- ... Batroxobin may promote venous sinus recanalization and attenuate CVT-induced stenosis. Further randomized study of this ...
Venombin A - Wikipedia
Alternatively, batroxobin is also used as a topical hemostatic by its rapid local clot-expansion action. Nolan C, Hall LS, ... Itoh N, Tanaka N, Funakoshi I, Kawasaki T, Mihashi S, Yamashina I (June 1988). "Organization of the gene for batroxobin, a ... Vu, TT; Stafford, AR; Leslie, BA; Kim, PY; Fredenburgh, JC; Weitz, JI (7 June 2013). "Batroxobin binds fibrin with higher ... Examples include ancrod and batroxobin, two serine proteases from snakes that have been used in medical preparations. Venombin ...
WHOCC - ATC/DDD Index
Similar articles for PubMed (Select 24228100) - PubMed - NCBI
Effects of batroxobin and electric cauterization on vascular remodeling of rabbit with a removal of carotid arterial adventitia ... Effects of Batroxobin on distal anastomotic intimal hyperplasia after expanded polytetrafluoroethylene bypass grafting in dog ... The topically hemostatic effects of batroxobin on the carotid arteries adventitia removal rabbit]. ...
Patent US7819908 - Compositions and methods for reducing lung volume - Google Patents
Leslie B[au] - PubMed - NCBI
Prolonged Hemocoagulase Agkistrodon Halys Pallas Administration Induces Hypofibrinogenemia in Patients with Hematological...
Batroxobin Anemia Aplastic Fibrinolysis Afibrinogenemia Myelodysplastic syndromes This is a preview of subscription content, ... Zeng Z, Xiao P, Chen J, Wei Y (2009) Are batroxobin agents effective for perioperative hemorrhage in thoracic surgery? A ... Feasibility of treating hyperfibrinogenemia with intermittently administered batroxobin in patients with ischemic stroke/ ...
View source for Template:Antihemorrhagics - wikidoc
Snake venom inspires coagulant gel - The Engineer The Engineer
The use of batroxobin allows us to get around this problem because it can immediately start the clotting process, regardless of ... The snake venom batroxobin is combined with nanofibre hydrogels from the Rice lab. According to the researchers, it is first ... While batroxobin has already been approved by the FDA, SB50 will have to undergo significant further testing before it gets ... Batroxobin is a haemotoxin that has similar properties to thrombin, a naturally occurring enzyme in humans that plays an ...
Table of Contents - August 01, 1998, 26 (3) | Biochemical Society Transactions
Stent placement in short unilateral iliac occlusion. Technique and 24-month results.
JoVE | Peer Reviewed Scientific Video Journal - Methods and Protocols
Pharmacodynamics and pharmacokinetics of batroxobin in Beagle dog].. Zi-Hua Zheng, Xiao-Xia Zhu, Hui Gan, Ruo-Lan Gu, Zhuo-Na ... Healthy Beagle dogs were administrated with batroxobin by intravenous infusion at high, medium and low doses. The study of ... Especially, the D-dimmer levels and the batroxobin concentration in plasma after intravenous infusion of the drug were ... The results of pharmacodynamics showed that D-dimmer level increased significantly after the administration of batroxobin, ...
BFT II Analyzer - Siemens Healthineers Croatia
Snake venom hydrogel stops bleeding in 6 seconds - Futurity
The researchers also tested several other options: the hydrogel without batroxobin, the batroxobin without the hydrogel, a ... Batroxobin was recognized for its properties as a coagulant-a substance that encourages blood to clot-in 1936. It has been used ... "Batroxobin is also an enzyme with similar function to thrombin, but its function is not blocked by heparin. This is important ... While batroxobin is already approved, the hydrogel has not yet won approval, a process he expects will take several more years ...
Reptilase | definition of reptilase by Medical dictionary
Haemocoagulase: Indication, Dosage, Side Effect, Precaution | MIMS Thailand
Haemocoagulase CED39 - Creative BioMart
Batroxobin is a thrombin-like proteolytic enzyme isolated from the venom of Bothrops atrox. It splits the 16 Arg-17 Gly bond in ... Batroxobin can be used to determine fibrinogen in plasma, to measure the batroxobin clotting time (Reptilase time) as a heparin ... Hence, Batroxobin is used to determine fibrinogen in plasma, to measure a batroxobin clotting time as a heparin-insensitive ... Batroxobin is a thrombin-like proteolytic enzyme isolated from the venom of Bothrops atrox. It splits the 16 Arg-17 Gly bond in ...
Native Bothrops atrox snake Defibrase - Creative Enzymes
The medicine Defibrase is the trade name given to batroxobin and is isolated from the venom of Bothrops moojeni. It functions ... The batroxobin from the snake Bothrops atrox is patented as Reptilase and used as a hemostatic drug. ... The medicine Defibrase is the trade name given to batroxobin and is isolated from the venom of Bothrops moojeni. It functions ...
TachoSil Versus Standard Surgical Treatment for Air Leakage in Pulmonary Lobectomy (TC-021-IM)
SSC WHO Standards - International Society on Thrombosis and Haemostasis, Inc.
Fibrin2
- This is achieved by adding reptilase (batroxobin), which generates fibrin without platelet activation, and factor [XIII. (thefreedictionary.com)
- It splits the 16 Arg-17 Gly bond in the Aα-chain of fibrinogen and causes the release of fibrinopeptide A and the formation of fibrin I monomer or Des-AA-monomer which spontaneously aggregates into a clot of fibrin I. Batroxobin also induces the release of tPA from endothelium. (creativebiomart.net)
Bothrops14
- Batroxobin, also known as reptilase, is a snake venom enzyme with Venombin A activity produced by Bothrops atrox and Bothrops moojeni, venomous species of pit viper found east of the Andes in South America. (wikipedia.org)
- Different enzymes, isolated from different species of Bothrops, have been called batroxobin, but unless stated otherwise, this article covers the batroxobin produced by B. moojeni, as this is the most studied variety. (wikipedia.org)
- Bothrops atrox was described by Carl Linnaeus as early as 1758, but batroxobin, the active compound in its venom, was first described only in 1954 by H. Bruck and G. Salem. (wikipedia.org)
- Batroxobin that is naturally extracted from the snake venom is mainly obtained from the snake Bothrops moojeni. (wikipedia.org)
- Because the batroxobin isolated from venom is highly irregular in quality, it is now more often synthesized in organisms using Bothrops moojeni cDNA. (wikipedia.org)
- The structure and working mechanism of batroxobin extracted from the Bothrops moojeni have been thoroughly studied. (wikipedia.org)
- As such, the structure of Bothrops moojeni batroxobin is further elucidated. (wikipedia.org)
- These studies have mostly been performed by biologically synthesizing batroxobin from Bothrops moojeni cDNA, and analyzing this product and using homology models based on other proteases, such as thrombin and trypsin, among others. (wikipedia.org)
- After the cDNA nucleotide sequence of batroxobin from Bothrops moojeni was determined back in 1986, a research group from the Kyoto Sangyo university successfully expressed the cDNA for batroxobin in E. Coli in 1990 The recognition sequence for thrombin was used to obtain mature batroxobin. (wikipedia.org)
- An enzyme obtained from the venom of vipers, Bothrops species known as batroxobin. (mims.com)
- Batroxobin is a thrombin-like proteolytic enzyme isolated from the venom of Bothrops atrox. (creativebiomart.net)
- Batroxobin is a serine protease derived from the venom of Bothrops atrox. (creativebiomart.net)
- The medicine Defibrase is the trade name given to batroxobin and is isolated from the venom of Bothrops moojeni. (creative-enzymes.com)
- The batroxobin from the snake Bothrops atrox is patented as Reptilase and used as a hemostatic drug. (creative-enzymes.com)
Ancrod1
- Examples include ancrod and batroxobin, two serine proteases from snakes that have been used in medical preparations. (wikipedia.org)
Thrombin Time2
- More recently, in 1979, a German study showed the uses of batroxobin (reptilase clot retraction test) as a replacement test for the more commonly used thrombin time. (wikipedia.org)
- Hence, Batroxobin is used to determine fibrinogen in plasma, to measure a ''batroxobin clotting time'' as a heparin-insensitive parallel to the thrombin time, to investigate dysfibrinogenemia, and to test the contractile system of platelets. (creativebiomart.net)
Fibrinogen5
- Batroxobin obtained from certain subspecies exhibits the hemostatic efficacy, whereas the protein obtained from other subspecies exhibits the cleavage of fibrinogen. (wikipedia.org)
- We conclude that a single intravenous administration of batroxobin at 10 BU reduced the RBC-A in patients with cerebral infarction during the acute phase in accordance with a decrease in the fibrinogen level. (elsevier.com)
- Due to its specific action on fibrinogen and its ability to clot platelet-rich plasma without affecting the integrity and functions of the platelets, and thanks to its insensitivity to thrombin inhibitors, batroxobin has found several applications as a tool in blood coagulation research and diagnosis. (creativebiomart.net)
- We found that thrombin-catalyzed polymerization of gammaD298,301A fibrinogen was modestly impaired, whereas batroxobin-catalyzed polymerization was significantly impaired relative to normal fibrinogen. (proteopedia.org)
- Batroxobin is a defibrongenating agent which has been observed to reduce fibrinogen levels and thus reduce clot risk when used intravenously. (drugbank.com)
Biomaterials Science and Engineering1
- For the study, published in ACS Biomaterials Science and Engineering , researchers combined batroxobin with their synthetic, self-assembling nanofibers, which can be loaded into a syringe and injected at the site of a wound, where they reassemble themselves into a gel. (futurity.org)
Venom7
- This study showed that it was possible to produce batroxobin using micro-organisms, a method which was more promising than isolating the enzyme from extracted snake venom. (wikipedia.org)
- Organization of the gene for batroxobin, a thrombin-like snake venom enzyme. (wikipedia.org)
- The snake venom batroxobin is combined with nanofibre hydrogels from the Rice lab. (theengineer.co.uk)
- Though inspired by snake venom, the batroxobin used by the Rice team is actually harvested from genetically modified bacteria and then purified to avoid contaminants. (theengineer.co.uk)
- SB50 takes the powerful clotting ability of this snake venom and makes it far more effective by delivering it in an easily localised hydrogel that prevents possible unwanted systemic effects from using batroxobin alone. (theengineer.co.uk)
- The hydrogel called SB50 incorporates batroxobin, a venom produced by two species of South American pit viper. (futurity.org)
- Molecular cloning and sequence analysis of cDNA for batroxobin, a thrombin-like snake venom enzyme. (we-rock.cc)
Hemostatic3
- Because of the increasing interest in the properties of batroxobin, several studies on its hemostatic effect and coagulation have been published. (wikipedia.org)
- Alternatively, batroxobin is also used as a topical hemostatic by its rapid local clot-expansion action. (wikipedia.org)
- The topically hemostatic effects of batroxobin on the carotid arteries adventitia removal rabbit]. (nih.gov)
Enzyme2
- Batroxobin is a haemotoxin that has similar properties to thrombin, a naturally occurring enzyme in humans that plays an important role in clotting. (theengineer.co.uk)
- Batroxobin is also an enzyme with similar function to thrombin, but its function is not blocked by heparin. (futurity.org)
Serine protease1
- Batroxobin is a protein of the serine protease family. (wikipedia.org)
Clot1
- Batroxobin was recognized for its properties as a coagulant-a substance that encourages blood to clot-in 1936. (futurity.org)
Calcium gluconate2
- Platelet gel can be obtained by activation of fresh, cryopreserved, autologous or allogeneic platelet concentrates with calcium gluconate, thrombin and/or batroxobin. (elsevier.com)
- Abstract Background The aim of this study was to use transmission electron microscopy to describe the ultrastructural characteristics of clots obtained from canine and feline platelet concentrates (PC) that had been activated with calcium gluconate (CG) or CG plus batroxobin (CGB). (temoa.info)
Systemic1
- Positive results were reported favoring systemic steroids, intratympanic [inside the inner ear] steroids, batroxobin, magnesium, vitamin E and hyperbaric oxygen, although there were serious limitations in each study with a positive finding. (news-medical.net)
Heparin3
- First recognised in 1936 for its coagulant capabilities, batroxobin is particularly useful for treating patients who have taken the anti-coagulant drug heparin. (theengineer.co.uk)
- The use of batroxobin allows us to get around this problem because it can immediately start the clotting process, regardless of whether heparin is there or not. (theengineer.co.uk)
- To investigate the interactive effects between batroxobin and low molecular weight heparin (LMWH) in reducing peri-operative blood loss and coagulation function in patients who undergone the total hip replacement surgery. (bvsalud.org)
Underwent1
- The objective of this study was to evaluate cerebral venous recanalization with magnetic resonance black-blood thrombus imaging (MRBTI) in patients with cerebral venous thrombosis (CVT) who underwent batroxobin treatment in combination with anticoagulation.A total of 31 CVT patients were enrolled in this real-world registry study. (tripdatabase.com)
SB501
- While batroxobin has already been approved by the FDA, SB50 will have to undergo significant further testing before it gets approval for clinical use. (theengineer.co.uk)
Hydrogels1
- The batroxobin combined with the hydrogels isn't taken directly from snakes, Hartgerink says. (futurity.org)
Cerebral2
- We examined the effect of defibrinogenation with batroxobin on the erythrocyte aggregability (RBC-A) in 16 patients with cerebral infarction during the acute phase (less than 72 hours after onset). (elsevier.com)
- Batroxobin in combination with anticoagulation may promote venous sinus recanalization in cerebral venous thrombosis: A real-world experience. (tripdatabase.com)
Perioperative2
- Zeng Z, Xiao P, Chen J, Wei Y (2009) Are batroxobin agents effective for perioperative hemorrhage in thoracic surgery? (springer.com)
- Batroxobin (2 U) could reduce the perioperative blood loss in patients with LMWH who had undergone the total hip replacement operation but did not show adverse effect on DVT. (bvsalud.org)
Molecular weight1
- Theoretically, the molecular weight of batroxobin should be around 25.5 kDa. (wikipedia.org)
Homology1
- A later molecular modelling study from 1998 used the homology between glandular kallikrein from the mouse and batroxobin, which is about 40%, to propose a 3D structure for biologically active batroxobin. (wikipedia.org)
Species1
- In 2004, a research group from Korea produced batroxobin by expressing it in the yeast species Pichia pastoris. (wikipedia.org)
Clinical1
- The researchers also tested several other options: the hydrogel without batroxobin, the batroxobin without the hydrogel, a current clinical hemostat known as GelFoam and an alternative self-assembling hemostat known as Puramatrix and found that none were as effective, especially in the presence of anti-coagulants. (futurity.org)
Effects2
Patients1
- Eight patients received a single intravenous administration of 10 units of batroxobin (BU), while the other 8 patients received 5 BU. (elsevier.com)
Found1
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Produce1
- After cleaving the fusion protein, the recombinant batroxobin could be isolated by electrophoresis and it was then successfully refolded to produce biologically active batroxobin. (wikipedia.org)
Treatment1
- The treatment of DVT with batroxobin and anticoagulants was effective and safe. (labome.ru)
Research1
- The structure of batroxobin has been studied by various research groups throughout the years. (wikipedia.org)
Function1
- Batroxobin is closely related in physiological function and molecular size to thrombin. (wikipedia.org)