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      • KCI등재

        The expressions of HSP70 and αB-crystallin in myocarditis associated with foot-and-mouth disease virus in lambs

        Mustafa Yavuz Gulbahar,Yonca Betil Kabak,Mehmet Onder Karayigit,Murat Yarim,Tolga Guvenc,Unal Parlak 대한수의학회 2011 JOURNAL OF VETERINARY SCIENCE Vol.12 No.1

        This study describes the expression of heat shock protein70 (HSP70) and alpha-basic-crystallin (α-BC) and their association with apoptosis and some related adaptor proteins in the pathogenesis of foot-and-mouth disease virus (FMDV)-induced myocarditis in lambs. HSP70 was generally overexpressed in the myocardial tissues and inflammatory cells of FMDV-induced myocarditis with differential accumulation and localization in same hearts when compared to non-foot-and-mouth disease control hearts. α-BC immunolabeling showed coarse aggregations in the Z line of the cardiomyocytes in FMDV-infected hearts in contrast to control hearts. Overall, the results of this study show that the anti-apoptotic proteins, HSP70 and α-BC, were overexpressed with increased apoptosis in FMDV-infected heart tissues. Both proteins failed to protect the cardiomyocytes from apoptosis as defense mechanisms to the FMDV during the infection, suggesting that the virus is able to increase apoptosis via both downregulation and/or upregulation of these anti-apoptotic proteins.

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        Alpha basic crystallin expression in canine mammary tumors

        Tolga Guvenc,Mustafa Yavuz Gulbahar,Murat Yarim,Yonca Betil Kabak,Onder Karayigit,Mahmut Sozmen 대한수의학회 2012 JOURNAL OF VETERINARY SCIENCE Vol.13 No.1

        The aim of this study was to evaluate prognostic and/or diagnostic factors of canine mammary tumors by immunohistochemically analyzing the expression of alpha basic crystallin (aB-c). For this, formalin-fixed, paraffin-embedded blocks of 51 naturally-occurring canine mammary tumors (11 benign and 40 malignant) were used. Tissue from eight normal canine mammary glands were served as a control. Immunohistochemically, in the control mammary tissues, a few luminal epithelial cells were aB-c positive but myoepithelial cells were negative. In benign or simple type malignant tumors, aB-c expression was observed in luminal epithelial cells while the myoepithelial basal cells were negative. In benign or complex type malign tumors, positive staining was predominantly found in the cytoplasm of epithelial cells. Immunoreactivity of aB-c was also observed in neoplastic myoepithelial cells. Statistically, the number of cells immunolabeled with aB-c was found to be significantly different among tissues from normal canine mammary glands, benign lesions, and malignant tumors (p < 0.05). aB-c immunoreactivity was higher in malignant tumors than the control mammary tissues (p < 0.001). Data obtained in the current study revealed a strong association between high expression levels af aB-c and primary mammary gland tumors in canines.

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