title: Salvianolic acid A protects the peripheral nerve function in diabetic rats through regulation of the AMPK-PGC1α-Sirt3 axis.
abstract: Salvianolic acid A (SalA) is one of the main efficacious, water-soluble constituents of Salvia miltiorrhiza Bunge. This study investigated the protective effects of SalA on peripheral nerve in diabetic rats. Administration of SalA (0.3, 1 and 3 mg/kg, ig) was started from the 5th week after strepotozotocin (STZ60 mg/kg) intraperitoneal injection and continued for 8 weeks. Paw withdrawal mechanical threshold (PWMT) and motor nerve conduction velocity (MNCV) were used to assess peripheral nerve function. The western blot methods were employed to test the expression levels of serine-threonine liver kinase B1 (LKB1), AMP-activated protein kinase (AMPK), peroxisome proliferator-activated receptor-gamma coactivator-1alpha (PGC-1α), silent information regulator protein3 (sirtuin 3/Sirt3) and neuronal nitric oxide synthase (nNOS) in sciatic nerve. Results showed that SalA administration could increase PWMT and MNCV in diabetic rats; reduce the deterioration of sciatic nerve pathology; increase AMPK phosphorylation level, up-regulate PGC-1α, Sirt3 and nNOS expression, but had no influence on LKB1. These results suggest that SalA has protective effects against diabetic neuropathy. The beneficial effects of SalA on peripheral nerve function in diabetic rats might be attributed to improvements in glucose metabolism through regulation of the AMPK-PGC1α-Sirt3 axis.
authors.affiliation: Beijing Key Laboratory of Drug Target Identification and Drug Screening, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, China.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Yu
authors.forename: Li
authors.initials: L
authors.lastname: Zhang
authors.forename: Xiuying
authors.initials: X
authors.lastname: Yang
authors.forename: Huakang
authors.initials: H
authors.lastname: Huang
authors.forename: Zhonglin
authors.initials: Z
authors.lastname: Huang
authors.forename: Lili
authors.initials: L
authors.lastname: Shi
authors.forename: Hengai
authors.initials: H
authors.lastname: Zhang
authors.forename: Guanhua
authors.initials: G
authors.lastname: Du
mesh_terms: D000091162:AMP-Activated Protein Kinase Kinases; D000818:Animals; D001786:Blood Glucose / Q000032:analysis; D001835:Body Weight / Q000187:drug effects; D002109:Caffeic Acids / Q000737:chemistry / Q000494:pharmacology*; D003921:Diabetes Mellitus, Experimental / Q000188:drug therapy / Q000378:metabolism / Q000503:physiopathology*; D003929:Diabetic Neuropathies / Q000517:prevention & control*; D017127:Glycation End Products, Advanced / Q000097:blood; D007773:Lactates / Q000737:chemistry / Q000494:pharmacology*; D008315:Malondialdehyde / Q000097:blood; D052248:Nitric Oxide Synthase Type I / Q000096:biosynthesis; D010525:Peripheral Nerves / Q000187:drug effects* / Q000502:physiology; D000071248:Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha; D011494:Protein Kinases / Q000378:metabolism*; D017346:Protein Serine-Threonine Kinases / Q000096:biosynthesis; D016601:RNA-Binding Proteins / Q000378:metabolism*; D051381:Rats; D027561:Salvia miltiorrhiza; D012584:Sciatic Nerve / Q000187:drug effects; D056566:Sirtuin 3 / Q000378:metabolism*; D013311:Streptozocin; D013482:Superoxide Dismutase / Q000097:blood; D014157:Transcription Factors / Q000378:metabolism*
chemical_list: D001786:Blood Glucose; D002109:Caffeic Acids; D017127:Glycation End Products, Advanced; D007773:Lactates; D000071248:Peroxisome Proliferator-Activated Receptor Gamma Coactivator 1-alpha; C501429:Ppargc1a protein, rat; D016601:RNA-Binding Proteins; D014157:Transcription Factors; D008315:Malondialdehyde; C066201:salvianolic acid A; D013311:Streptozocin; D052248:Nitric Oxide Synthase Type I; D013482:Superoxide Dismutase; D011494:Protein Kinases; D017346:Protein Serine-Threonine Kinases; C488755:Stk11 protein, rat; D000091162:AMP-Activated Protein Kinase Kinases; D056566:Sirtuin 3