*  HKU Scholars Hub: Nitric Oxide/Nitric Oxide Synthase, Spermatogenesis, and Tight Junction Dynamics
During spermatogenesis, preleptotene and leptotene spermatocytes, residing in the basal compartment of the seminiferous epithelium, must traverse the blood-testis barrier (BTB) to gain entry to the adluminal compartment for further development at late stage VIII and early stage IX of the epithelial cycle. As such, the timely opening and closing of the BTB is crucial to spermatogenesis. A compromise in this process can lead to infertility. Moreover, the BTB is unique in its relative localization in the seminiferous epithelium compared to the tight junctions (TJs) found in other epithelia. Sertoli cell TJs are situated near the basal lamina in the testis, closest to the basement membrane (a modified form of extracellular matrix [ECM]), unlike TJs found in other epithelia, which are found nearest the apical portion of an epithelium, farthest away from ECM. Needless to say, BTB function in the testis is maintained by intricate regulatory mechanisms. In addition to hormones and ...
  http://hub.hku.hk/handle/10722/143479
*  "Spermatogenesis and meiotic chromosome biology in the North American g" by Laura K Garvey Reinholdt
Spermatogenesis in the gypsy moth, Lymantria dispar (L.), involves the differentiation of two sperm types, apyrene and eupyrene. The apyrene sperm are anucleate and while they do not participate directly in fertilization, they are required for successful fertilization of eggs by the nucleate, eupyrene sperm. Using electron microscopy, light microscopy and immunocytochemistry, I examined apyrene and eupyrene spermatogenesis in an attempt to explain the events, which lead to the missegregation of meiotic chromosomes in apyrene spermatocytes. Briefly, by the end of meiotic prophase I, bivalents were not present in apyrene spermatocytes. Additionally, pairing, synapsis and recombination were either defective or not present in apyrene spermatocytes. In 1997, Friedlander suggested that an event, occurring early in prophase I is sensitive to the onset of pupation and triggers apyrene spermatogenesis (Friedlander, 1997). I support this hypothesis and suggest that ...
  http://opencommons.uconn.edu/dissertations/AAI3013739/
*  A Multicenter, Single-Arm Study of the Effects of Atrasentan on Spermatogenesis and Testicular Function - AdisInsight
This study is investigating the safety and effects of atrasentan on spermatogenesis and testicular function in patients with type 1 or type 2 diabetes and
  http://adisinsight.springer.com/trials/700243612
*  SirT1 is required in the male germ cell for differentiation and fecundity in mice | Development
SirT1 whole body KO mice have been shown to lack pituitary hormones for reproduction, and fertility in females can be rescued by administration of these hormones (Kolthur-Seetharam et al., 2009; McBurney et al., 2003). The present study demonstrates that SirT1 is necessary in male germ cells for normal spermatogenesis. Mice lacking SirT1 in male germ cells displayed decreased sperm counts, and many of their spermatozoa have aberrant morphology and increased DNA lesions. These defects explain why male germ cell SirT1 KO mice sire only ∼15% of the progeny number that are sired by control mice. Our findings indicate that SirT1 plays an additional essential role in male germ cells.. Cells in the mid-to-late stages of meiosis I contain the highest levels of SirT1, whereas it is present at moderate levels in differentiating spermatogonia and haploid round spermatids. Without SirT1, the appearance of pachytene cells in seminiferous tubules is delayed, demonstrating that SirT1 is required for ...
  http://dev.biologists.org/content/141/18/3495
*  oogenesis Archives - Biology Notes Help
SPERMATOGENESIS Process of producing spermatozoa from spermatogonial stem cells by the way of mitosis & meiosis. Spermatogonia ---- primary spermatocyte ---- secondary spermatocyte ---- spermatid ---- spermatozoa. LOCATION In mammals spermatogenesis occurs in the seminiferous tubules of the male testes. TIME Spermatogenesis continues young (13-14 yr) to old man (60-65 yr age). PROCESS Spermatogenesis […]. ...
  http://www.biologynoteshelp.com/tag/oogenesis/
*  What is Spermatogenesis? - Definition from FertilitySmarts
Spermatogenesis Definition - Spermatogenesis is the process of sperm development. Sperm, the male sex cells, are essential for reproduction, and any...
  https://www.fertilitysmarts.com/definition/592/spermatogenesis-fertility
*  spe-10 Encodes a DHHC-CRD Zinc-Finger Membrane Protein Required for Endoplasmic Reticulum/Golgi Membrane Morphogenesis During...
The spe-10 gene encodes a novel, predicted four-pass integral membrane protein that contains a highly conserved DHHC-CRD motif (Bohm et al. 1997; Putilina et al. 1999). If a potential glycosylation site following TM4 is utilized, then the N-terminal region, the DHHC-CRD zinc-finger, and the C-terminal region should all face the lumen of the MO (Figure 6A). This orientation would allow the N-linked glycans to face the exterior of the cell surface when the MOs fuse to the plasma membrane. Northern hybridizations comparing oogenesis-specific and spermatogenesis-specific transcripts indicate that the spe-10 mRNA is found only in worms that are actively engaged in spermatogenesis (Figure 4B). SPE-10 localizes within the lysosome-like FB-MOs and segregates to spermatids as they bud from the residual body during C. elegans spermatogenesis (Figure 8). These results suggest that a lack of wild-type SPE-10 in the FB-MOs of spe-10 mutants probably causes the previously ...
  http://www.genetics.org/content/172/1/145
*  Spermatogenesis - Fertilization Contraception Molecular, Cellular, and Endocrine Events in Male Reproduction ISBN13...
Get the best deals on Spermatogenesis - Fertilization Contraception Molecular, Cellular, and Endocrine Events in Male Reproduction ISBN13:9780387554365 ISBN10:038755436X from TextbookRush at a great price and get free shipping on orders over $35!
  http://www.textbookrush.com/browse/books/9780387554365
*  Regulation of Spermatogenesis by X-linked miRNAs - Wei Yan
Meiotic sex chromosome inactivation (MSCI) during spermatogenesis is characterized by transcriptional silencing of genes on both the X and Y chromosomes in mid...
  http://grantome.com/grant/NIH/R01-HD060858-04
*  Spermatogenesis
The process of sperm formation. The term was created from the prefix spermato (Greek sperma, the seed or germ) + genesis (the coming into being of something) = the coming into being of sperm. Spermatogenesis is in contrast to oogenesis, the…
  https://medicine.academic.ru/7682/Spermatogenesis
*  Histology of the Testis, Epididymis and Spermatogenesis - www.urology-textbook.com
microscopic anatomy (histology) of the testis, epididymis, scrotum and spermatogenesis, from the online textbook of urology by D. Manski
  http://www.urology-textbook.com/testis-histology.html
*  Important stages of spermatogenesis relative to the tra | Open-i
Important stages of spermatogenesis relative to the transcription. Here, we commence with the differentiation of prespermatogonial gonocytes in spermatogonia. S
  https://openi.nlm.nih.gov/detailedresult.php?img=PMC4492041_AJA-17-529-g001&req=4
*  urinary system essay spermatogenesis essay oxbridge notes the united kingdom best images about urinary and kidney health...
urinary system essay spermatogenesis essay oxbridge notes the united kingdom best images about urinary and kidney health organs that are present in the excretory system of human essay nursing informative music
  http://straterra.us/urinary-system-essay.html
*  Spermatogenesis
... :new: SpermatogenesisMethods and ProtocolsSeries: Methods in Molecular Biology, Vol. 927 Barnard, Lori; Aston, Kenneth I. (Eds.)2013
  http://www.vetelib.com/threads/23000-Spermatogenesis
*  Citation Machine: Spermatogenesis format citation generator for patent
Citation Machine™ helps students and professionals properly credit the information that they use. Cite your patent in Spermatogenesis format for free.
  http://www.citationmachine.net/spermatogenesis/cite-a-patent/manual
*  Citation Machine: Spermatogenesis format citation generator for website
Citation Machine™ helps students and professionals properly credit the information that they use. Cite your website in Spermatogenesis format for free.
  http://www.citationmachine.net/spermatogenesis/cite-a-website
*  spermatogenesis ppt
Spermatogenesis Compile http://i.imgur.com/S2BCwjP.jpg Pages: Publisher: -- Edition: 2010 Language: English ISBN:
  http://www.vetelib.com/threads/19037-spermatogenesis-ppt
*  Sperm production, SEM - Stock Image C016/9765 - Science Photo Library
Sperm production. Coloured scanning electron micrograph (SEM) of sperm cells (spermatozoa) in the seminiferous tubules of the testis. This is the site of spermatogenesis (sperm production). Each sperm cell consists of a head (grey), which contains the genetic material that fertilises the female egg cell, and a tail (blue), which propels the sperm. The heads of the sperm are buried in Sertoli cells (pink), which nourish the developing sperm. - Stock Image C016/9765
  http://www.sciencephoto.com/media/530490/view
*  Sperm production, SEM - Stock Image C003/0689 - Science Photo Library
Sperm production. Coloured scanning electron micrograph (SEM) of sperm cells (spermatozoa) in the seminiferous tubules of the testis. This is the site of spermatogenesis (sperm production). Each sperm cell consists of a head (green), which contains the genetic material that fertilises the female egg cell, and a tail (blue), which propels the sperm. The heads of the sperm are buried in Sertoli cells (yellow and orange), which nourish the developing sperm. - Stock Image C003/0689
  http://www.sciencephoto.com/media/94923/view
*  PPT - Figure S1 PowerPoint Presentation - ID:118047
Dsim\rux-PA. Dsec\rux-PA. Dere\rux-PA. Dyak\rux-PA. Dana\GF22065-PA. Dwil\GK19724-PA. Dvir\GJ16032-PA. Dpse\GA18118-PA. Dper\GL14959-PA. Dmoj\GI16487-PA. Dgri\GH17896-PA. Recurrent events of positive selection in independent Drosophila lineages at the spermatogenesis gene roughex Slideshow 118047 by Melvin
  https://www.slideserve.com/Melvin/figure-s1
*  Dynamic analysis of testicular histology of Meig1-defic | Open-i
Dynamic analysis of testicular histology of Meig1-deficient mice during the first wave of spermatogenesis. Representative testicular sections stained with Hemat
  https://openi.nlm.nih.gov/detailedresult.php?img=PMC4352978_develop-142-119834-g1&req=4
*  "Development expression of h-2 antigens in the spermatogenic cell serie" by M Vojtiskova and Z Pokorna
Vojtiskova, M and Pokorna, Z, "Development expression of h-2 antigens in the spermatogenic cell series, possible bearing on haploid gene action." (1972). Subject Strain Bibliography 1972. 770 ...
  http://mouseion.jax.org/ssbb1972/770/
*  Ovary, testis, oogenesis and spermatogenesis - The A Level Biologist - Your Hub
This is your stop for learning resources, extra info and essential dates and documents. I've scoured the world just to bring you, the A Level biologists, all you need to succeed and enjoy your Biology A Level.
  http://www.thealevelbiologist.co.uk/topics/wjec-a2-topics/ovary-testis-oogenesis-and-spermatogenesis
*  Spermatogenesis: the Formation of Mans Sperm | Infertility Treatment
It is quite an amazing process and the quality of sperm you or your partner ejaculates today is actually dependent upon the health and lifestyle that you've had predominantly over the last 120 days.
  http://babycapsule.in/spermatogenesis-the-formation-of-mans-sperm.html
*  Browsing Research in Reproduction and Contraception, Center for by Author "Holdcraft, Robert W."
In a screen for RNA binding proteins expressed during murine spermatogenesis, we cloned a novel, ancient zinc finger protein possessing a region common to a small class of RNA binding proteins. Zfr (zinc ...
  https://digital.lib.washington.edu/researchworks/handle/1773/15603/browse?value=Holdcraft%2C+Robert+W.&type=author