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Lapatinib inhibits meiotic maturation of porcine oocyte-cumulus complexes cultured in vitro in gonadotropin-supplemented medium.

Abstract：

OBJECTIVE:To determine whether inhibition of epidermal growth factor (EGF) receptor tyrosine kinase with lapatinib affects oocyte maturation, expression of the cumulus expansion-associated genes such as tumor necrosis factor alpha-induced protein 6 (TNFAIP6) and prostaglandin-endoperoxide synthase 2 (PTGS2), and synthesis of hyaluronan (HA) and progesterone (P) by porcine oocyte cumulus complexes (OCC). DESIGN:Our work focuses on lapatinib, an orally active small molecule that selectively inhibits the tyrosine kinase domain of both EGF receptor and human EGF receptor 2, and downstream signaling. SETTING:A reproductive biology laboratory. PATIENT(S):Not applicable. INTERVENTION(S):Porcine OCC were cultured in vitro in a medium with FSH/LH in the presence/absence of lapatinib. MAIN OUTCOME MEASURE(S):Methods performed: real-time reverse transcriptase-polymerase chain reaction (PCR), immunofluorescence, RIA. RESULT(S):In FSH/LH-stimulated and expanded cumulus oophorus extracellular matrix, HA was detected with biotinylated HA-binding proteins. However, weaker HA- and weaker cytoplasmic TNFAIP6 were detected were detected in lapatinib-pretreated OCC. The expression of the two cumulus expansion-associated gene transcripts was significantly decreased and synthesis of HA by cumulus cells was reduced. Lapatinib (10 μM) inhibited FSH/LH-induced oocyte meiotic maturation. Progesterone production increased after OCC stimulation with FSH/LH and was significantly decreased by lapatinib (10 μM). CONCLUSION(S):Lapatinib inhibits oocyte maturation and reduces expression of cumulus expansion-associated transcripts, and synthesis of HA and P in OCC cultured in vitro in FSH/LH-supplemented medium.

journal_name

Fertil Steril

journal_title

Fertility and sterility

authors

Nagyova E,Nemcova L,Mlynarcikova A,Scsukova S,Kalous J

doi

10.1016/j.fertnstert.2012.12.040

subject

Has Abstract

pub_date

2013-05-01 00:00:00

pages

1739-48

issue

6

eissn

0015-0282

issn

1556-5653

pii

S0015-0282(13)00002-2

journal_volume

99

pub_type

杂志文章

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