共 49 条
Creatine and Nicotinamide Prevent Oxidant-Induced Senescence in Human Fibroblasts
被引:11
作者:
Mahajan, Avinash S.
[1
]
Arikatla, Venkata S.
[1
]
Thyagarajan, Anita
[1
]
Zhelay, Tetyana
[1
]
Sahu, Ravi P.
[1
]
Kemp, Michael G.
[1
,2
]
Spandau, Dan F.
[3
,4
,5
]
Travers, Jeffrey B.
[1
,2
]
机构:
[1] Wright State Univ, Boonshoft Sch Med, Dept Pharmacol & Toxicol, Dayton Ohio, OH 45435 USA
[2] Dayton Vet Adm Med Ctr, Dayton Ohio, OH 45428 USA
[3] Indiana Univ Sch Med, Dept Dermatol & Biochem, Indianapolis, IN 46223 USA
[4] Indiana Univ Sch Med, Dept Mol Biol, Indianapolis, IN 46223 USA
[5] Richard L Roudebush Vet Adm Med Ctr, Indianapolis, IN 46202 USA
来源:
基金:
美国国家卫生研究院;
关键词:
fibroblast;
senescence;
reactive oxygen species;
insulin-like growth factor-1;
Cr;
NAM;
FACTOR-I RECEPTOR;
BETA-GALACTOSIDASE;
DNA-DAMAGE;
SKIN;
STRESS;
PHENOTYPE;
CELLS;
D O I:
10.3390/nu13114102
中图分类号:
R15 [营养卫生、食品卫生];
TS201 [基础科学];
学科分类号:
100403 ;
摘要:
Dermal fibroblasts provide structural support by producing collagen and other structural/support proteins beneath the epidermis. Fibroblasts also produce insulin-like growth factor-1 (IGF-1), which binds to the IGF-1 receptors (IGF-1Rs) on keratinocytes to activate signaling pathways that regulate cell proliferation and cellular responses to genotoxic stressors like ultraviolet B radiation. Our group has determined that the lack of IGF-1 expression due to fibroblast senescence in the dermis of geriatric individuals is correlated with an increased incidence of skin cancer. The present studies tested the hypothesis that pro-energetics creatine monohydrate (Cr) and nicotinamide (NAM) can protect normal dermal human fibroblasts (DHF) against experimentally induced senescence. To that end, we used an experimental model of senescence in which primary DHF are treated with hydrogen peroxide (H2O2) in vitro, with senescence measured by staining for beta-galactosidase activity, p21 protein expression, and senescence associated secretory phenotype cytokine mRNA levels. We also determined the effect of H2O2 on IGF-1 mRNA and protein expression. Our studies indicate that pretreatment with Cr or NAM protects DHF from the H2O2-induced cell senescence. Treatment with pro-energetics post-H2O2 had no effect. Moreover, these agents also inhibited reactive oxygen species generation from H2O2 treatment. These studies suggest a potential strategy for protecting fibroblasts in geriatric skin from undergoing stress-induced senescence, which may maintain IGF-1 levels and therefore limit carcinogenesis in epidermal keratinocytes.
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页数:15
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