Mark A Levy, Junqiang Tian, Mandi Gandelman, Haojie Cheng, Menelaos Tsapekos, Sara R Crego, Rolando Maddela, Robert Sinnott
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引用次数: 3
Abstract
Telomeres are nucleotide repeat sequences located at the end of chromosomes that protect them from degradation and maintain chromosomal stability. Telomeres shorten with each cell division; hence telomere length is associated with aging and longevity. Numerous lifestyle factors have been identified that impact the rate of telomere shortening; high vitamin consumption has been associated with longer telomere length, whereas oxidative stress is associated with telomere shortening. In this paper, we sought to determine if a multivitamin mixture containing both vitamins and a blend of polyphenolic compounds, could reduce telomere shortening consequent to an oxidative stress (10 uM H2O2 for 8 weeks) in a primary fibroblast cell culture model. Under conditions of oxidative stress, the median and 20th percentile telomere length were significantly greater (p < 0.05), and the percentage of critically short telomeres (<3000 bp) was significantly less (p < 0.05) in cells treated with the multivitamin mixture at 4, 15 and 60 ug/ml compared to control (0 ug/ml). Median and 20th percentile telomere shortening rate was also reduced under the same conditions (p < 0.05). Taken together, these findings demonstrate that the multivitamin mixture protects against oxidative stress-mediated telomere shortening in cell culture, findings which may have implications in human health.
端粒是位于染色体末端的核苷酸重复序列,保护染色体免受降解并维持染色体的稳定性。端粒随着每次细胞分裂而缩短;因此,端粒长度与衰老和寿命有关。已经确定了许多影响端粒缩短速度的生活方式因素;高维生素摄入量与端粒长度延长有关,而氧化应激则与端粒缩短有关。在本文中,我们试图确定含有维生素和多酚化合物混合物的复合维生素混合物是否可以在原代成纤维细胞培养模型中减少氧化应激(10 uM H2O2持续8周)导致的端粒缩短。在氧化应激条件下,端粒长度中位数和第20百分位显著增加(p p),端粒缩短率也显著降低(p p
期刊介绍:
The Journal of Dietary Supplements (formerly the Journal of Nutraceuticals, Functional & Medical Foods) has been retitled to reflect the bold departure from a traditional scientific journal presentation to a leading voice for anyone with a stake in dietary supplements. The journal addresses important issues that meet the broad range of interests from researchers, regulators, marketers, educators, and health professionals from academic, governmental, industry, healthcare, public health, and consumer education sectors. This vital tool not only presents scientific information but interprets it - helping you more readily pass it on to your students, patients, clients, or company.