Document Detail


Granulosa cell subtypes vary in response to oxidized low-density lipoprotein as regards specific lipoprotein receptors and antioxidant enzyme activity.
MedLine Citation:
PMID:  20444928     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
CONTEXT: The oxidized low-density lipoprotein (oxLDL) and its lectin-like oxLDL receptor-1 (LOX-1) are found in the follicular fluid and in granulosa cells. Lipoprotein receptors and antioxidant enzymes could differ in granulosa cell subtypes. OBJECTIVE: Our aim was to reveal cell-specific responses under oxLDL treatment. DESIGN AND SETTING: We conducted basic research at the Institute of Anatomy and the Clinic of Reproductive Medicine. PATIENTS: Women undergoing in vitro fertilization therapy participated in the study. MAIN OUTCOME MEASURES: Cultures of cytokeratin-positive/negative (CK(+)/CK(-)) granulosa cells and of cumulus cells were treated with 150 microg/ml oxLDL or native LDL under serum-free conditions for up to 36 h. Dead cells were determined by uptake of propidium iodide. LOX-1, toll-like receptor 4, and cluster of differentiation 36 (CD36) were examined in lysates by Western blots. The enzyme activities were determined in lysates and in supernatants. RESULTS: Under oxLDL treatment, predominantly CK(+) cells underwent nonapoptotic cell death. Receptors showed a cell-specific pattern of up-regulation: toll-like receptor 4 in CK(+) cells, LOX-1 in CK(-) cells, and CD36 in cumulus cells. An antioxidant ranking occurred: superoxide dismutase activity in CK(+) cells, total glutathione in CK(-) cells, and catalase activity in cumulus cells. The supernatants of oxLDL-treated CK(+) cell cultures contained more catalase activity than in controls, whereas a moderate increase was noted for glutathione peroxidase (GPx) in supernatants of CK(-) and cumulus cells. CONCLUSIONS: Catalase/GPx activity in the supernatants may be due to cell death or to secretion. Oxidative stress could be sensed by CK(+) cells and indicated by changes in catalase/GPx activity in the follicular fluid during ovarian disorders.
Authors:
H Serke; J Bausenwein; J Hirrlinger; M Nowicki; C Vilser; P Jogschies; F A Hmeidan; V Blumenauer; K Spanel-Borowski
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-05-05
Journal Detail:
Title:  The Journal of clinical endocrinology and metabolism     Volume:  95     ISSN:  1945-7197     ISO Abbreviation:  J. Clin. Endocrinol. Metab.     Publication Date:  2010 Jul 
Date Detail:
Created Date:  2010-07-08     Completed Date:  2010-07-26     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0375362     Medline TA:  J Clin Endocrinol Metab     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3480-90     Citation Subset:  AIM; IM    
Affiliation:
Institute of Anatomy, University of Leipzig, Liebigstrasse 13, D-04103 Leipzig, Germany.
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MeSH Terms
Descriptor/Qualifier:
Analysis of Variance
Antigens, CD36 / metabolism
Antioxidants / metabolism*
Blotting, Western
Cell Count
Cells, Cultured
Female
Fluorescent Antibody Technique
Glutathione / metabolism
Granulosa Cells / metabolism*
Humans
Lipoproteins, LDL / metabolism*
Receptors, LDL / metabolism*
Scavenger Receptors, Class E / metabolism*
Superoxide Dismutase / metabolism
Toll-Like Receptor 4 / metabolism
Chemical
Reg. No./Substance:
0/Antigens, CD36; 0/Antioxidants; 0/Lipoproteins, LDL; 0/OLR1 protein, human; 0/Receptors, LDL; 0/Scavenger Receptors, Class E; 0/TLR4 protein, human; 0/Toll-Like Receptor 4; 70-18-8/Glutathione; EC 1.15.1.1/Superoxide Dismutase

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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