Association of ENPP1 gene polymorphisms with hand osteoarthritis in a Chuvasha population. (1/4)Periarticular calcification is a common attendant symptom of generalized arterial calcification of infancy, a rare Mendelian disorder caused by mutations of the gene coding for ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1). This prompted us to perform a family-based association study to test the hypothesis that genetic variation at the ENPP1 locus is involved in the etiology of osteoarthritis of the hand. The study population comprised 126 nuclear families with 574 adult individuals living in small villages in the Chuvasha and Bashkirostan autonomies of the Russian Federation. The extent of osteoarthritis was determined by analyzing plain hand radiographs. The outcome of a principal component analysis of osteoarthritis scores of a total of 28 joints of both hands was used as a primary phenotype in this study. Maximum likelihood estimates of the variance component analysis revealed a substantial contribution of genetic factors to the overall trait variance of about 25% in this homogeneous population. Three short tandem repeat (STR) polymorphisms--one intragenic and two flanking markers--and four single-nucleotide polymorphisms were tested. The markers tagged the ENPP1 locus at nearly equal intervals. We used three different transmission disequilibrium tests and obtained highly significant association signals. Alleles of the upstream microsatellite marker as well as several single-nucleotide polymorphism haplotypes consistently revealed the association. Thus, our data highlights variability of ENPP1 as an important genetic factor in the pathogenesis of idiopathic osteoarthritis. (+info)
Crystals in hand. (2/4)A genetic association of the ENPP1 gene with primary hand osteoarthritis was recently reported in this journal. ENPP1 encodes an enzyme that regulates soft tissue calcification. The study as it stands is far from complete because the actual causal variant(s) within ENPP1 has not been identified and no functional study on the activity of the enzyme in hand osteoarthritis was presented. Nevertheless, the study stimulates interest and will encourage others in the field to test ENPP1 as a possible osteoarthritis susceptibility gene in their cohorts. The genetic basis of osteoarthritis is slowly being uncovered, and this report constitutes another interesting find. (+info)
Heritability of a skeletal biomarker of biological aging. (3/4)Changes in the skeletal system, which include age-related bone and joint remodeling, can potentially be used as a biomarker of biological aging. The aim of the present study was to investigate the extent and mode of inheritance of skeletal biomarker of biological aging-osseographic score (OSS), in a large sample of ethnically homogeneous pedigrees. The investigated cohort comprised 359 Chuvashian families and included 787 men aged 18-89 years (mean 46.9) and 723 women aged 18-90 years (mean 48.5). The TOSS - transformed OSS standardized in 5-year age groups for each sex, was analyzed as a BA index. We evaluated familial correlations and performed segregation analysis. Results of our study suggest the familial aggregations of TOSS variation in the Chuvashian pedigrees. In a segregation analysis we found a significant major gene (MG) effect in the individual's TOSS with a dominant most parsimonious model (H(2) = 0.32). Genetic factors (MG genotypes) explained 47% of the residual OSS variance after age adjustment and after including sex-genotype interaction, they explained 52% of the residual variance. Results of our study also indicated that the inherited difference in the skeletal aging pattern in men lies mostly in the rate of aging, but in women in the age of the onset of the period of visible skeletal changes. (+info)
Developmental programming of growth: genetic variant in GH2 gene encoding placental growth hormone contributes to adult height determination. (4/4)(+info)
I'm sorry, but I'm not aware of any medical term or concept related to "Bashkiria." It is possible that you may be referring to the Republic of Bashkortostan, which is a federal subject of Russia located in the Volga-Ural region. However, I do not see any direct connection between this political entity and the medical field. If you have any further information or context, please let me know and I will do my best to assist you.
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- In the fourth and 5th centuries AD, the Magyars moved to the west of the Ural Mountains to the area between the southern Ural Mountains and the Volga River known as Bashkiria ( Bashkortostan ) and Perm Krai . (donauschwaben-usa.org)
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- Golovchenko expressed his views on the success of the joint confrontation between Russia and Belarus and pressure from the West at a meeting with the Russian governor, head of Bashkiria, Radiy Khabirov. (rusreality.com)
- The tax on the extraction of minerals in the metallurgical industry will increase from 2022, Russian President Vladimir Putin said during a meeting with workers of the Tsemiks plant in Bashkiria, Russia 24 TV channel reported. (russiabusinesstoday.com)