title: Effects of asiaticoside on levels of podocyte cytoskeletal proteins and renal slit diaphragm proteins in adriamycin-induced rat nephropathy.
abstract: OBJECTIVE
  Centella asiatica has been used to treat kidney diseases in Chinese traditional medicine. Asiaticoside (an extraction of C. asiatica) exerts a variety of pharmacological effects including immunomodulatory and anti-inflammatory functions. However, the mechanism of asiaticoside in the treatment of renal diseases remains largely unknown. This study investigated the molecular mechanism of asiaticoside in treating adriamycin-induced nephropathy of rats.
  
  
  METHODS
  Sixty-two SD male rats were randomly divided into normal control group (n=12) and nephropathy group (n=50). Except for the normal control group, rats were injected with adriamycin (6mg/kg) via the tail vein to induce nephropathy. Adriamycin induced nephropathic rats were divided into untreated group, prednisone group (25mg/kg), and asiaticoside groups with various dosages (8, 16 and 32mg/kg). Samples of urine and serum, tissue of kidney were collected for analysis after treatments for four weeks. Morphological changes were evaluated under light microscope and electron microscope. Synaptopodin, desmin, nephrin and podocin mRNA and protein were determined by RT-PCR and Western blotting.
  
  
  RESULTS
  Compared to the untreated nephropathy group, asiaticoside treatment mitigated histological damages, decreased 24-hour urine protein excretion and total cholesterol, increased serum albumin. Asiaticoside treatment increased the mRNA and protein levels of synaptopodin, nephrin and podocin in a dose-dependent manner. Furthermore, asiaticoside treatment decreased the mRNA and protein levels of desmin.
  
  
  CONCLUSIONS
  Asiaticoside can mitigate adriamycin-induced nephropathy in rats, which is associated with the increase in synaptopodin, nephrin and podocin gene expression, and the decrease in desmin gene expression.
authors.affiliation: Department of Traditional Chinese Medicine, The Second Affiliated Hospital of Xi'an Jiaotong University, Shaanxi, China.
authors.forename: Zhu
authors.initials: Z
authors.lastname: Wang
authors.forename: Juntian
authors.initials: J
authors.lastname: Liu
authors.forename: Wansen
authors.initials: W
authors.lastname: Sun
mesh_terms: D000818:Animals; D000903:Antibiotics, Antineoplastic / Q000633:toxicity; D015153:Blotting, Western; D028041:Centella / Q000737:chemistry*; D003598:Cytoskeletal Proteins / Q000187:drug effects* / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D004317:Doxorubicin / Q000633:toxicity*; D005786:Gene Expression Regulation / Q000187:drug effects; D007674:Kidney Diseases / Q000139:chemically induced / Q000188:drug therapy* / Q000503:physiopathology; D008297:Male; D008516:Medicine, Chinese Traditional / Q000379:methods; D008565:Membrane Proteins / Q000187:drug effects / Q000378:metabolism; D008853:Microscopy / Q000379:methods; D050199:Podocytes / Q000187:drug effects / Q000378:metabolism; D012333:RNA, Messenger / Q000378:metabolism; D051381:Rats; D017207:Rats, Sprague-Dawley; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014315:Triterpenes / Q000008:administration & dosage / Q000302:isolation & purification / Q000494:pharmacology*
chemical_list: D000903:Antibiotics, Antineoplastic; D003598:Cytoskeletal Proteins; D008565:Membrane Proteins; D012333:RNA, Messenger; D014315:Triterpenes; D004317:Doxorubicin; C004446:asiaticoside
keywords: Adriamycin-induced nephropathy; Asiaticoside; Desmin; Nephrin; Podocin; Synaptopodin