Study on the potential mechanism of Qingxin Lianzi Yin Decoction on renoprotection in db/db mice via network pharmacology and metabolomics

•This study established content determination method of QXLZY index components.•This study is the first time to elucidate that amino acid metabolism was disturbed in the kidney of db/db mice, which could be callback by QXLZY.•Untargeted metabolomics studies were performed to investigate by UHPLC-LTQ...

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