نتایج جستجو برای: sperm telomere length
تعداد نتایج: 350309 فیلتر نتایج به سال:
introduction: the telomeric dna together with its associated proteins protects the chromosome ends from degradation or aberrant recombination. telomerase and telomere are closely associated with development of cancers. in this study we aim to investigate the significance of telomerase activity (ta) and telomere length (tl) in patients with acute promyelocytic leukemia (apl). methods: peripher...
Background: Exercise and consumption of green tea affect the aging process. However, the effect of exercise training combined with green tea extract on leukocyte telomere length, quality of life (QoL) and body composition in aging has so far been unclear and inconsistent. Objective: The aim of the present study was to determine the effectiveness of aerobic training intervention and green tea e...
1. to determine whether difference in birth body mass influenced growth performance in pipistrellus kuhlii we studied a total of 12 captive-born neonates. bats were assigned to two body mass groups: light birth body mass (lbw: 0.89 ± 0.05, n=8) and heavy birth body mass (hbw: 1.35 ± 0.08, n=4). heavier body mass at birth was associated with rapid postnatal growth (body mass and forearm length) ...
When human fibroblasts from different donors are grown in vitro, only a small fraction of the variation in their finite replicative capacity is explained by the chronological age of the donor. Because we had previously shown that telomeres, the terminal guanine-rich sequences of chromosomes, shorten throughout the life-span of cultured cells, we wished to determine whether variation in initial ...
Background: Telomeres are evolutionary, specialized terminal structures at the ends of eukaryotic chromosomes containing TTAGGG repeats in human. Several human diseases have been known to be associated with dramatic changes in telomere length. The aim of the present study was to assess the correlation between the relative leukocyte telomere length (LTL) and infertility in a group of Iranian azo...
Telomere length (TL) in humans is highly heritable and undergoes progressive age-dependent shortening in somatic cells. By contrast, sperm donated by older men display comparatively long telomeres, presumably because in the male germline, telomeres become longer with age. This puzzling phenomenon might explain why TL in the offspring correlates positively with paternal age. The present communic...
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Telomeres are repeating sequences of DNA found at the ends of chromosomes, that shorten in most proliferating tissues as we age and our cells replicate. Shortened telomeres result in a reduced capacity for cell proliferation, and in adults have been shown to predict increased morbidity and earlier mortality. Whereas telomeres tend to shorten with cell replications in most tissues, sperm telomer...
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