Salvianolic acid A protects the peripheral nerve function in diabetic rats through regulation of the AMPK-PGC1α-Sirt3 axis.

  • Yu X
  • Zhang L
  • Yang X
 et al. 
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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.

Author-supplied keywords

  • Animals
  • Blood Glucose
  • Blood Glucose: analysis
  • Body Weight
  • Body Weight: drug effects
  • Caffeic Acids
  • Caffeic Acids: chemistry
  • Caffeic Acids: pharmacology
  • Diabetes Mellitus, Experimental
  • Diabetes Mellitus, Experimental: drug therapy
  • Diabetes Mellitus, Experimental: metabolism
  • Diabetes Mellitus, Experimental: physiopathology
  • Diabetic Neuropathies
  • Diabetic Neuropathies: prevention & control
  • Glycosylation End Products, Advanced
  • Glycosylation End Products, Advanced: blood
  • Lactates
  • Lactates: chemistry
  • Lactates: pharmacology
  • Malondialdehyde
  • Malondialdehyde: blood
  • Nitric Oxide Synthase Type I
  • Nitric Oxide Synthase Type I: biosynthesis
  • Peripheral Nerves
  • Peripheral Nerves: drug effects
  • Peripheral Nerves: physiology
  • Protein Kinases
  • Protein Kinases: metabolism
  • Protein-Serine-Threonine Kinases
  • Protein-Serine-Threonine Kinases: biosynthesis
  • RNA-Binding Proteins
  • RNA-Binding Proteins: metabolism
  • Rats
  • Salvia miltiorrhiza
  • Sciatic Nerve
  • Sciatic Nerve: drug effects
  • Sirtuin 3
  • Sirtuin 3: metabolism
  • Streptozocin
  • Superoxide Dismutase
  • Superoxide Dismutase: blood
  • Transcription Factors
  • Transcription Factors: metabolism

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Authors

  • Xiaoyan Yu

  • Li Zhang

  • Xiuying Yang

  • Huakang Huang

  • Zhonglin Huang

  • Lili Shi

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