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Apoptosis of cultured granulosa-lutein cells is reduced by insulin-like growth factor I and may correlate with embryo fragmentation and pregnancy rate.

Abstract：

OBJECTIVE:To correlate apoptosis of cultured human granulosa-lutein cells (GL cells) with the outcome of IVF (embryo fragmentation and pregnancy rate) and to study the effect of insulin and insulin-like growth factor I (IGF-I) on apoptosis. DESIGN:In vitro assays. SETTING:University laboratory and private IVF center. PATIENT(S):Eighty-one women undergoing IVF. INTERVENTION(S):Purified human GL cells from pooled follicles were cultured for 48 hours in serum-free media with or without insulin and IGF-I. Cumulus cells and mural GL cells were evaluated separately. MAIN OUTCOME MEASURE(S):Detection of apoptosis by using caspACE FITC-VAD-FMK, a fluorescent in situ marker for activated caspases; embryo fragmentation; and pregnancy. RESULT(S):Age younger than 38 years and successful pregnancy were associated with less apoptosis (33.0% +/- 17.2% vs. 43.2% +/- 18.0% and 30.2% +/- 14.0% vs. 40.4% +/- 19.5%, respectively). There was a linear correlation between embryo fragmentation and GL cell apoptosis. Insulin-like growth factor I decreased apoptosis in a dose-dependent fashion. A statistically significant effect (17% decrease) was reached at a dose of 10 nM. Insulin (10 nM) caused a small (8%) decrease in apoptosis, but this effect did not reach statistical significance. Cumulus cells consistently had <3% apoptosis. CONCLUSION(S):[1] Apoptosis of cultured GL cells may be associated with IVF outcome and ovarian reserve and [2] IGF-I decreases apoptosis of cultured GL cells.

journal_name

Fertil Steril

journal_title

Fertility and sterility

authors

Bencomo E,Pérez R,Arteaga MF,Acosta E,Peña O,Lopez L,Avila J,Palumbo A

doi

10.1016/j.fertnstert.2005.08.014

subject

Has Abstract

pub_date

2006-02-01 00:00:00

pages

474-80

issue

2

eissn

0015-0282

issn

1556-5653

pii

S0015-0282(05)03847-1

journal_volume

85

pub_type

杂志文章

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