Green Tea Extract, Keratin Hydrolysate and Vitamin C Exert Anti-Ageing Effects Through the Hippo Signalling Pathway in Feline and Canine Mammary Gland Cells.
Gao Yi Y, Sun Xue X, Ma Yan Y, Li Jiaxi J et al.
Ageing is a progressive decline in organ function and tissue integrity caused by genetic, environmental and physiological factors. With the increasing lifespan of companion animals, effective anti-ageing interventions for elderly felines and canines have attracted growing attention in veterinary medicine. This study aimed to investigate the anti-ageing effects of green tea extract, keratin hydrolysate and vitamin C in feline and canine mammary gland cells and to explore the underlying molecular mechanisms. Feline and canine mammary gland cells were treated with green tea extract, keratin hydrolysate and vitamin C in vitro. Cell proliferation, oxidative stress responses and ageing-associated protein expression induced by actinomycin D were evaluated. The involvement of the Hippo signalling pathway was further analysed to determine the molecular mechanisms underlying the anti-ageing effects. Green tea extract, keratin hydrolysate and vitamin C significantly promoted the proliferation of feline and canine mammary gland cells. These treatments effectively restored the abnormal expression of ageing-related proteins induced by actinomycin D and exhibited protective effects against oxidative damage. Mechanistically, the anti-ageing effects were associated with regulation of the Hippo signalling pathway. Green tea extract, keratin hydrolysate and vitamin C exhibit significant anti-ageing effects in feline and canine mammary gland cells through modulation of the Hippo pathway. These findings suggest their potential as safe and effective anti-ageing interventions for improving health and alleviating geriatric syndromes in ageing companion animals.