Reduced Expression of αvβ3 Integrin in the Endometrium of Unexplained Infertility Patients with Recurrent IVF-ET Failures: Improvement by Danazol Treatment

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Endometrial αvβ3 integrin expression was lower in unexplained infertility patients with recurrent IVF-ET failures, but increased following danazol treatment.

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This prospective study evaluated endometrial integrin αvβ3 expression in mid-secretory endometrium from 10 fertile controls and 57 infertile patients with recurrent IVF-ET failures, comparing 22 patients with unexplained infertility versus 35 with explained infertility using semiquantitative immunohistochemical staining intensity. αvβ3 levels were lower in the unexplained infertility group than in fertile controls and than in patients with explained infertility, indicating a functional (but not morphological) endometrial defect as a potential contributor. Nine randomly selected unexplained infertility patients were treated with oral danazol for 12 weeks and showed a significant increase in αvβ3 staining after treatment. This paper is centrally about endometriosis — it is not the study’s focus, but it is relevant because it measures endometrial integrin abnormalities and includes prior literature on aberrant integrin expression in endometriosis as context.

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Abstract

PurposeTo determine whether there is any association between the expression of endometrial integrin alphavbeta3 and repeated IVF-ET failure and to examine the effect of danazol treatment on alphavbeta3 expression.MethodsThis prospective study was performed using a semiquantitative immunohistochemical analysis on the staining intensity of alphavbeta3 in the mid-secretory endometria derived from 10 fertile women and 57 infertile patients with a history of repeated IVF-ET failures. Nine patients randomly selected from these 22 patients with unexplained infertility were then treated with oral danazol administration for 12 weeks and reexamined at the first mid-secretory phase after the danazol treatment.Result(s)The levels of endometrial alphavbeta3 expression were lower in 22 patients with unexplained infertility than in the fertile control and 35 patients with explained infertility. The 9 patients treated with danazol showed a significant increase in the alphavbeta3 staining.Conclusion(s)The significantly decreased expression of endometrial integrin alphavbeta3 suggested that functional, but not morphological, endometrial defect may be one of the causes for the patients with unexplained infertility. Danazol may have a therapeutic potential in improving endometrial function together with up-regulation of alphavbeta3.
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Abstract

Purpose : To determine whether there is any association between the expression of endometrial integrin α v β3 and repeated IVF-ET failure and to examine the effect of danazol treatment on α v β3 expression.

Methods

This prospective study was performed using a semiquantitative immunohistochemical analysis on the staining intensity of α v β3 in the mid-secretory endometria derived from 10 fertile women and 57 infertile patients with a history of repeated IVF-ET failures. Nine patients randomly selected from these 22 patients with unexplained infertility were then treated with oral danazol administration for 12 weeks and reexamined at the first mid-secretory phase after the danazol treatment. Result(s) : The levels of endometrial α v β3 expression were lower in 22 patients with unexplained infertility than in the fertile control and 35 patients with explained infertility. The 9 patients treated with danazol showed a significant increase in the α v β3 staining. Conclusion(s) : The significantly decreased expression of endometrial integrin α v β3 suggested that functional, but not morphological, endometrial defect may be one of the causes for the patients with unexplained infertility. Danazol may have a therapeutic potential in improving endometrial function together with up-regulation of α v β3. Similar content being viewed by others

References

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Fertil Steril 1979;31:481–485 Author information Authors and Affiliations Rights and permissions About this article Cite this article Tei, C., Maruyama, T., Kuji, N. et al. Reduced Expression of αvβ3 Integrin in the Endometrium of Unexplained Infertility Patients with Recurrent IVF-ET Failures: Improvement by Danazol Treatment. J Assist Reprod Genet 20, 13–20 (2003). https://doi.org/10.1023/A:1021254620888 Issue date: DOI: https://doi.org/10.1023/A:1021254620888

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