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Qing'E formula alleviates the aging process in D-galactose-induced aging mice.

Qing'E formula (QEF) is a clinically used prescription with four ingredients, Eucommiae Cortex, Psoraleae Fructus, Juglandis Semen and Garlic Rhizoma, from the Song dynasty (10th century CE). The present study aimed to investigate the anti-aging effect and mechanisms of QEF on D-galactose-induced aging mice. A mouse subacute aging model was established by subcutaneous injection of D-galactose at the neck consecutively for 8 weeks. Motor activity and memory impairment of the mice were evaluated by the rotarod test and passive avoidance test, respectively. Serum and liver parameters were analyzed with biochemical kits. Hippocampal mRNA and protein expression levels were examined by reverse transcription-quantitative polymerase chain reaction and western blotting, respectively. QEF administration significantly ameliorated the impaired motor and memory of aging mice. In the serum, QEF reduced blood urea nitrogen, creatinine, nitric oxide (NO) and malondialdehyde (MDA) levels, and inhibited alanine aminotransferase and aspartate aminotransferase activities. In the liver, QEF increased the glutathione level, enhanced total antioxidant capacity and catalase activity, deceased NO and MDA production, and reduced NO synthase activity. In the hippocampus, QEF elevated gene expression levels of Klotho, sirtuin 1 (SIRT1), forkhead box transcription factor O3, peroxisome proliferator-activated receptor γ coactivator 1α (PGC-1α), insulin-like growth factor-1 and peroxiredoxin-3. QEF increased protein expression levels of Klotho and SIRT1, and decreased that of PGC-1α in the hippocampus. In conclusion, QEF attenuated the aging process in D-galactose-treated mice, which may be mediated through enhancing the antioxidants in the body, protecting renal and hepatic health, and balancing hippocampal expression levels of the longevity-related genes.

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