RESUMEN
[Objective] To observe the anti - aging effects and explore the mechanism of Qibao Meiran Pellet (QMP) and its modified prescriptions, including QMP with qi - invigorating and spleen - strengthening herbs, with kidney -nourishing herbs or with blood - activating and purgative herbs. [ Methods ] Ten - month - old model rats were established by D - galactose. Serum free radical levels and immune indexes in QMP group and various modified QMP groups were observed. [ Results ] QMP increased the activity of superoxide dismutase ( SOD). QMP combined with kidney - nourishing herbs or blood - activating and purgative herbs decreased the serum level of malondialdehyde (MDA) and increased the activities of glutathione peroxidase (GSH - Px) and SOD. Meanwhile, QMP combined with kidney -nourishing herbs increased interleukin - 2 activities. [ ConclusionJ QMP, mainly composed of herbs for nourishing liver and spleen, can delay the aging of rats, and spleen - strengthening herbs and blood - activating and purgative herbs also play an important role in the delay of aging. Furthermore, it is suggested that the anti - aging effect of herbal medicine is related to the sex.