Endometrial protein expression during the luteal phase of the menstrual cycle / Expressão protéica no endométrio durante a fase lútea do ciclo menstrual

AUTOR(ES)

Paulo Cesar Serafini

DATA DE PUBLICAÇÃO

2007

RESUMO

Introduction: The objective of this study was to evaluate endometrial protein expressions from fertile and infertile women during the luteal phase of the menstrual cycle by immunohistochemistry in tissue microarrays (TMA). Method: The expression of ten proteins obtained from 52 endometrial samples in the initial, mid (window of implantation) and late (premenstrual) phases of the menstrual cycle were evaluated. Results: The proteins leukemia inhibitory factor (LIF), insulin like growth factor 1 (IGF-1), progesterone receptor (PR), claudin-4, vascular endothelial growth factor receptor 3 (VEGFR-3), and cytokeratin 7 (CK-7) were expressed in the endometrium in the three intervals of the luteal phase. Endometrial expression of the morphogenetic bone protein 4 (BMP-4) occurred during the initial and mid luteal phases. Cytokeratin 17, substance 100 and calretinin were not expressed in the luteal phase. There were positive correlations among endometrial expressions of LIF, IGF- 1, and PR. LIF and BMP-4 were differently expressed in the initial, mid and late phases of the luteal phase. Claudin-4 and PR did not express simultaneously during the different intervals of the luteal phase. Conclusion: These findings suggest that positively correlated endometrial expressions of LIF, IGF-1 and PR at the window of implantation could characterize an adequately developed and receptive endometrium.

ASSUNTO(S)

receptores dos fatores de crescimento immunohistochemistry proteins proteínas fase luteal menstrual cycle ciclo menstrual peptídeos e proteínas de sinalização intercelular intercellular signaling peptides and proteins imunohistoquímica endometrium luteal phase growth factor receptors endométrio

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