Yazar "Saruhan, B. G." seçeneğine göre listele

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    Distribution of estrogen receptor ? and progesterone receptor B in the bovine oviduct during the follicular and luteal phases of the sexual cycle: an immunohistochemical and semi-quantitative study
    (Taylor & Francis Inc, 2011) Saruhan, B. G.; Sagsoz, H.; Akbalik, M. E.; Ketani, M. A.
    The aim of our study was to determine the distribution of estrogen receptor alpha (ER alpha) and progesterone receptor B (PR-B) in the bovine oviduct during the follicular and luteal phases. Bovine oviducts from 23 animals were obtained from a local slaughterhouse. Blood samples from these animals also were taken before death to measure estrogen and progesterone levels. The serum levels of estradiol-17 beta and progesterone changed during the estrous cycle. Tissue distribution of ER alpha and PR-B was examined using immunohistochemical techniques and the results showed that ER alpha and PR-B were stained in nuclei of cells and could be detected in all compartments along the entire oviduct during both the follicular and luteal phases. During the follicular phase, no significant differences were found between ER alpha and PR-B distribution (p < 0.05), while significant differences were found between ER alpha and PR-B during the luteal phase (p < 0.05). We results indicated that the frequency and intensity of ER alpha and PR-beta immunoreactivity in the oviduct of bovines varied according to the oviductal cell types and the phases of the sexual cycle.
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    Expression of the erbB/HER receptor family in the bovine uterus during the sexual cycle and the relation of this family to serum sex steroids
    (Informa Healthcare, 2012) Sagsoz, H.; Ketani, M. A.; Saruhan, B. G.
    Our study was designed to investigate immunohistochemically the expression of the receptors of the erbB/HER family (erbB1/HER1, erbB2/HER2, erbB3/HER3, erbB4/HER4) in the bovine uterus during the follicular and luteal phases of the sexual cycle, and the relation to ovarian sex steroids. The stage of the estrous cycle in 30 Holstein bovine was assessed based on the gross and histological appearance of the ovaries and uterus, and on blood steroid hormone levels. Tissue samples taken from the uterus were fixed in 10% formaldehyde for routine histological processing. Positive membrane and cytoplasmic staining of varying intensity were determined in the uterus during the follicular and luteal phases of the sexual cycle for erbB/HER receptors in luminal and glandular epithelial cells, connective tissue, smooth muscle and vascular endothelial and smooth muscle cells. We demonstrated that the apical and basal membranes of luminal epithelial cells and the apical membrane of glandular epithelial cells reacted with erbB1/HER1 and erbB2/HER2 during both the follicular and luteal phases. The reaction for erbB3/HER3 and erbB4/HER4 was stronger in the cytoplasm of luminal and glandular epithelial cells, but was heterogeneous. During both the follicular and luteal phases, the percentage and staining intensity of luminal and superficial glandular epithelial cells reacting positively with the receptors erbB1/HER1, erbB2/HER2, erbB3/HER3 and erbB4/HER4 were greater than those of deep glandular epithelial and connective tissue cells (p < 0.05). We demonstrated that the expression of the erbB/HER receptor family varied with different cell types in the bovine uterus during the follicular and luteal phases.
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    The expression of vascular endothelial growth factor and its receptors (flt1/fms, flk1/KDR, flt4) and vascular endothelial growth inhibitor in the bovine uterus during the sexual cycle and their correlation with serum sex steroids
    (Elsevier Science Inc, 2011) Sagsoz, H.; Saruhan, B. G.
    The present study was conducted to demonstrate of the immunohistochemical localization of vascular endothelial growth factor (VEGF) and its receptors (flt1/fms, flk1/KDR and flt4) as well as vascular endothelial growth inhibitor (VEGI) and to determine the correlation of VEGF and its receptors and VEGI with serum sex steroids (estrogen and progesterone) in the bovine uterus during the sexual cycle. The stage of the estrous cycle in 30 Holstein cattle was assessed based on the gross and histological appearance of the ovaries and uterus and on blood steroid hormone levels. Tissue samples obtained from the uterus were fixed in 10% formaldehyde for routine histological processing. During both follicular and luteal phases, positive cytoplasmic and membrane staining was achieved for VEGF and its receptors (fit1/fms, flk1/KDR and flt4) as well as VEGI in the luminal and glandular epithelial cells, the connective tissue and smooth muscle cells, and the vascular endothelial cells and smooth muscle cells in the uterus. The intensity, proportional and total scores determined for VEGF and its receptors (flt1/fms and flt4) as well as VEGI were greater in the luminal and glandular epithelial cells compared to the connective tissue and smooth muscle cells (P < 0.05). Furthermore, the number and intensity of the fik1/KDR positive cells were greater among the connective tissue cells compared to the luminal and glandular epithelial cells (P < 0.05). As a result, it was determined that the expression of VEGF and its receptors as well as VEGI in the bovine uterus during the follicular and luteal phases varied with different cell types. This suggests that depending on the stage of the sexual cycle, these factors may mediate the establishment of an appropriate environment for the nutritional supply and implantation of the embryo primarily due to the stimulation of angiogenesis but also through the increase in the secretory activity of the epithelial cells in the uterus. Furthermore, this indicates that ovarian steroid hormones play a significant role in regulating the expression of VEGF and its receptors as well as VEGI. (C) 2011 Elsevier Inc. All rights reserved.
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    Localization of estrogen receptor ? and progesterone receptor B in bovine cervix and vagina during the follicular and luteal phases of the sexual cycle
    (Taylor & Francis Ltd, 2011) Sagsoz, H.; Akbalik, M. E.; Saruhan, B. G.; Ketani, M. A.
    The localization and distribution of estrogen receptors (ER a) and progesterone receptors (PR-B) in the cervix and vagina of sexually mature bovines during the follicular and luteal phases of the sexual cycle were studied using immunohistocehmistry. The estrous cycle stage of 23 Holstein bovines was assessed by gross and histological appearance of ovaries and blood steroid hormone values. Tissue samples from cervix and vagina were fixed in 10% formaldehyde for routine histological processing. Nuclear staining for ER a and PR-B was observed in the epithelial cells of the surface epithelium, stromal cells and smooth muscle cells. Generally, in the cervix, ER a immunoreactivity was more intense in the epithelial and smooth muscle cells during the follicular phase and in the epithelial cells during the luteal phase (p < 0.05). PR-B immunoreactivity was more intense in the epithelial and smooth muscle cells than in the superficial and deep stromal cells during the follicular and luteal phases (p < 0.05). In the vagina, ER a and PR-B immunoreactivities were more intense in the epithelial cells than in the connective tissue cells and smooth muscle cells during the follicular and luteal phases (p < 0.05). These results indicated that the frequency and intensity of ER a and PR-B immunoreactivity in the cervix and vagina of bovines varied according to the cervical and vaginal cell types and the phases of the sexual cycle.