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ATP-induced apoptosis of human granulosa luteal cells cultured in vitro.

Authors
Park, DW; Cho, T; Kim, MR; Kim, YA; Min, CK; Hwang, KJ
Citation
Fertility and sterility, 80(4):993-1002, 2003
Journal Title
Fertility and sterility
ISSN
0015-02821556-5653
Abstract
OBJECTIVE: To investigate the role of extracellular adenosine triphosphatase (ATP) as an inducer of apoptotic cell death in human granulosa cells and to elucidate its underlying mechanism.



DESIGN: Prospective study.



SETTING: Gynecologic clinic and human reproduction research laboratory.



PATIENT(S): Twenty-five patients undergoing IVF or IVF-ET.



INTERVENTION(S): ATP treatment of granulosa luteal cells subjected to primary culture.



MAIN OUTCOME MEASURE(S): Apoptosis was assessed by the annexin V binding assay and the terminal deoxynucleotidyl transferase-mediated dUTP-digoxigenin nick-end labeling assay. The receptor type that binds ATP, thus mediating ATP-induced apoptosis, was determined by using the calcium imaging and patch-clamp techniques. Mitochondrial depolarization was assessed by staining with the membrane potential-sensitive dye 5,5',6,6'-tetrachloro-1,1',3,3'- tetraethylbenzimidazolyl carbocyanide iodide (JC-1).



RESULT(S): ATP elevated [Ca(2+)](i) by mobilizing intracellularly stored Ca(2+). An ionic membrane current evoked by ATP was mediated by the Ca(2+)-activated K(+) channel. ATP induced a mitochondrial depolarization with a concomitant increase in cellular apoptosis. Treatment with hCG eliminated both ATP-induced mitochondrial depolarization and apoptosis. CONCLUSION(s): Extracellular ATP recognized by P(2Y) type purinoceptor triggers apoptosis in human granulosa luteal cells, and the downstream apoptotic cascade may act at least in part through mitochondria. The antiapoptotic effect of hCG has possible clinical implications in the treatment of disorders involving granulosa cell degeneration (such as follicular atresia).
MeSH terms
Adenosine Triphosphate/pharmacology*Apoptosis/drug effects*Calcium/metabolismCells, CulturedChorionic Gonadotropin/pharmacologyFemaleHumansIntracellular Membranes/metabolismLuteal Cells/drug effects*Luteal Cells/metabolismLuteal Cells/physiology*Membrane Potentials/drug effectsMitochondria/physiologyOsmolar ConcentrationPatch-Clamp TechniquesProspective Studies
PMID
14556823
Appears in Collections:
Journal Papers > School of Medicine / Graduate School of Medicine > Obstetrics & Gynecology
AJOU Authors
김, 미란황, 경주
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