Document Detail

Cryptotanshinone reverses ovarian insulin resistance in mice through activation of insulin signaling and the regulation of glucose transporters and hormone synthesizing enzymes.
MedLine Citation:
PMID:  24973798     Owner:  NLM     Status:  Publisher    
OBJECTIVE: To investigate the effects of cryptotanshinone (CRY), an active component of Chinese medicine, on ovarian androgen production, insulin resistance (IR), and glucose metabolism in mice.
DESIGN: Animal model and in vitro tissue model.
SETTING: University-affiliated laboratory.
ANIMAL(S): Mice.
INTERVENTION(S): Ovarian IR was induced by dexamethasone (DEX) in vivo. Animals were randomized to receive CRY treatment for 3 days or not. Ovulation rates, serum steroid levels, and glucose uptake in ovaries were quantified, and proteins in the phosphatidylinositol 3-hydroxy kinase pathway were measured. In vitro ovarian IR was also induced by DEX for 3 days. Ovarian steroid hormone secretion and glucose uptake were measured, and the hormone-synthesizing enzymes were determined by semiquantitative reverse transcription-polymerase chain reaction.
MAIN OUTCOME MEASURE(S): Ovarian glucose uptake, in vivo ovulation rate, serum and culture medium steroid level, and molecular expression of phosphatidylinositol 3-hydroxy kinase and steroidogenic enzymes.
RESULT(S): Dexamethasone significantly increased ovulation rates in vivo and increased T and E2 production and decreased ovarian glucose uptake in vivo and in vitro. Cryptotanshinone significantly reduced ovulation rates in vivo and decreased T and estrogen production in vitro. Cryptotanshinone attenuated the inhibition of DEX on AKT2 and suppressed the up-regulation of CYP11 and CYP17 expression by DEX.
CONCLUSION(S): Cryptotanshinone reversed DEX-induced androgen excess and ovarian IR in mice through activation of insulin signaling and the regulation of glucose transporters and hormone-synthesizing enzymes. This suggests a potential role for CRY in treating the ovulatory dysfunction associated with PCOS.
Yangang Huang; Wei Li; Chi Chiu Wang; Xiaoke Wu; Jianhua Zheng
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-6-25
Journal Detail:
Title:  Fertility and sterility     Volume:  -     ISSN:  1556-5653     ISO Abbreviation:  Fertil. Steril.     Publication Date:  2014 Jun 
Date Detail:
Created Date:  2014-7-4     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372772     Medline TA:  Fertil Steril     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2014 American Society for Reproductive Medicine. Published by Elsevier Inc. All rights reserved.
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