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Immunohistochemical localization of beta defensins in the endometrium of rat uterus during the postpartum involution period

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Abstract

β-Defensins are small cationic molecules that have antimicrobial actions against bacteria, fungi and viruses and contribute to mucosal immune responses at epithelial sites. The female reproductive tract is an important site of defensin production. This study was conducted to determine the possible changes in proportions and localization of β-defensin 1-4 in the rat uterus at the 1st, 3th, 5th, 10th and 15th days of postpartum and at the period of diestrus using immunohistochemical techniques. In the present study, it was determined that β-defensin 1-4 were generally found in all structural components of the endometrium (luminal and glandular epithelium, stromal cells and blood vessels) in both the nucleus and the cytoplasm of cells during the involution period and diestrus. Suprisingly, immunoreaction of β-defensin 2 was also observed in the lateral membrane of the luminal and glandular epithelial cells on the 10th day of involution and immunostaining of β-defensin 4 was also localized in the apical membrane of the luminal and glandular epithelial cells. The current study demonstrated β-defensin 1-4 immunoreactivities in the endothelium of blood vessels were stronger throughout the involution period. Although β-defensins 2 and 3 were localized in both the nuclei and the cytoplasm of endothelial cells, β-defensins 1 and 4 were present in only cytoplasm. These results show that the most component of rat endometrium expresses human β-defensin 1-4 in a involution-dependent manner. Therefore it may be asserted that these molecules constitute a organised protection to prevent uterus from probable infections during the involution process.

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Acknowledgments

This study was summarized from Emel ALAN’s doctorate thesis and it was financially supported by Scientific Research Council of Erciyes University (Project No: TSD-08-624).

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  1. Department of Histology and Embryology, Faculty of Veterinary Medicine, University of Erciyes, 38090, Kayseri, Turkey

    Emel Alan & Narin Liman

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  1. Emel Alan
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  2. Narin Liman
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Correspondence to Narin Liman.

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Alan, E., Liman, N. Immunohistochemical localization of beta defensins in the endometrium of rat uterus during the postpartum involution period. Vet Res Commun 36, 173–185 (2012). https://doi.org/10.1007/s11259-012-9529-7

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