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    Effect of vitamin E on kidney histomorphology in rats exposed to bisphenol A
    (Cukurova Univ, Fac Medicine, 2020) Yıldız, Mustafa; Gules, Ozay; Boyacioglu, Murat; Kum, Sadiye
    Purpose: The aim of this study was to determine the effects of vitamin E on renal histomorphology in rats exposed to bisphenol A (BPA). Materials and Methods: The rats were randomly divided into four groups as sham, vitamin E, BPA and vitamin E+BPA. The applications of vitamin E and BPA were continued for three weeks. Crossman's triple staining method was applied to the sections obtained from kidney tissues for histomorphological examinations at the end of the experiment. Also, superoxide dismutase (SOD) activity and malondialdehyde (MDA) level were measured in kidney tissue. Results: The number of corpusculum renis, diameters of proximal tubule, distal tubule, ascending limb of Henle's loop and collecting duct as well as SOD activity significantly decreased in BPA group compared to sham group. Also, the number of corpusculum renis, diameters of ascending limb of Henle's loop and collecting duct as well as SOD activity significantly increased in vitamin E+BPA group compared to BPA group. On the other hand, MDA level significantly increased in BPA group compared to sham group and it significantly decreased in vitamin E+BPA group compared to BPA group. Conclusion: BPA may cause histomorphological and oxidative changes in the kidney. In addition, vitamin E may contribute to the preservation of renal tissue by reducing oxidative damage in BPA exposure.
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    Histological and immunohistochemical studies of the proximal caecum and caecal tonsils of quail (Coturnix coturnix japonica)
    (Wiley, 2019) Yıldız, Mustafa; Aydemir, Isil; Kum, Sadiye; Eren, Ulker
    The proximal caecum in quails consists of lymphoid and non-lymphoid structures. The caecal tonsils in the proximal part of the caecum are units of gut-associated lymphoid tissue in poultry. This study aimed to examine the histological characteristics of the proximal caecum, as well as compositions of dendritic cells (DCs) and antigen-presenting cells (APCs) in the caecal tonsil of quails. Tissue sections were stained with Crossman's triple, periodic acid-Schiff, Gordon and Sweet's silver, Congo red and methyl green-pyronin dyes, as well as immunohistochemically by the streptavidin-biotin-peroxidase complex method. Caecal lymphoid tissue was located in the lamina propria and submucosa. Germinative centres were observed within the lymphoid tissue. Reticular fibres were mainly distributed in the border area of the germinal centre with only a few fibres scattered in the centre. Plasma cells were observed in the subepithelial region and germinal centres. Eosinophil granulocytes were prevalent in the lymphoid tissue. Additionally, CD83-immunoreactive DCs and MHC class II immunoreactive APCs were present in the subepithelial area and diffuse lymphoid tissue. While DCs were seen in the germinal centres of tonsillar units, APCs were rarely present in the germinal centres, but they were noticed around the germinal centres. In conclusion, the histological structure of the proximal caecum in quails and the distributions of some immunological cells in the caecal tonsils were revealed. Therefore, the defensive role of the caecal tonsils in the digestive system may be better understood, and comparative studies may be carried out.
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    Protective effect of coenzyme Q10 against bisphenol-A-induced toxicity in the rat testes
    (Sage Publications Inc, 2019) Gules, Ozay; Kum, Sadiye; Yıldız, Mustafa; Boyacioglu, Murat; Ahmad, Ejaz; Naseer, Zahid; Eren, Ulker
    The present study was conducted to investigate the antioxidant, histomorphometric, histochemical, immunohistochemical, biochemical, and cytological effects of coenzyme Q10 (CoQ10) against bisphenol-A (BPA)-induced testicular toxicity in rats. A total of 40 adult male Wistar rats were divided into five equal groups. The control group remained untreated. The vehicle control group was administered corn oil (2 ml/kg/day), the BPA group was given BPA (100 mg/kg/day), the CoQ10 group was supplemented with CoQ10 (10 mg/kg/day), and the rats in the CoQ10-BPA group received CoQ10 (10 mg/kg/day) followed by BPA (100 mg/kg/day) 1 h later. The treatments were administered by oral gavage for 14 days. Results showed that the seminiferous tubule diameters (STDs) and seminiferous epithelium heights (SEHs) at stages VII-VIII and XII-XIV, number of undifferentiated embryonic cell transcription factor-1 (UTF-1) positive cells per tubule, UTF-1 positive tubules (%), plasma glutathione (GSH), and serum superoxide dismutase activities, testicular GSH activity and sperm viability (%) decreased whereas the number of terminal dUTP nick end labeling (TUNEL) positive cells per tubule, TUNEL positive tubules (%), testicular and serum malondialdehyde (MDA) levels, and the rate of mid-piece sperm abnormality increased in the BPA administered group. However, while the STDs at stages VII-VIII and XII-XIV, SEHs at stages VII-VIII, plasma GSH, and serum SOD activities increased, serum MDA level decreased in the CoQ10-BPA group. In conclusion, these results suggest a protective effect of CoQ10 against BPA-induced testicular toxicity in rats.
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    The effects of Vitamin E on periodic acid Schiff reaction, qfantity of argyrophilic Nfcleolar organizer regions and indfcible nitric oxide synthase expression in prostate of rats exposed to bisphenol A
    (Parlar Scientific Publications, 2019) Yıldız, Mustafa; Gules, Ozay; Sandikci, Mustafa; Kum, Sadiye
    The aim of the study is to determine the protective role of Vitamin E on the prostate of rats exposed to bisphenol A (BPA). A total of 40 adult male Wistar Albino rats were used. The rats were randomly divided into five groups as follows: control, sham, Vitamin E, BPA, and Vitamin E+BPA. The applications of Vitamin E (300 IU/kg/day) and BPA (10 mg/kg/day) were proceeded for three weeks. Periodic Acid Schiff (PAS) and Silver-Staining for Nucleolar Organizer Region (AgNOR) methods were applied to prostate sections for histochemical examinations. Also, inducible nitric oxide synthase (iNOS) expression was examined immunohistochemically. The number of AgNOR positive dots and intensity of iNOS expression in glandular epithelial cells of prostate increased in BPA group compared to control group. Also, iNOS expression decreased in Vitamin E+BPA group compared to BPA group. On the other hand, a significant difference wasn’t found between the groups in terms of PAS reaction. As a conclusion, our findings demonstrate that BPA might stimulate cell proliferation and oxidative changes in prostate. The usage of Vitamin E might contribute to reducing oxidative damage induced by BPA in prostate. © by PSP
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    THE EFFECTS OF VITAMIN E ON PERIODIC ACID SCHIFF REACTION, QUANTITY OF ARGYROPHILIC NUCLEOLAR ORGANIZER REGIONS AND INDUCIBLE NITRIC OXIDE SYNTHASE EXPRESSION IN PROSTATE OF RATS EXPOSED TO BISPHENOL A
    (Parlar Scientific Publications (P S P), 2019) Yıldız, Mustafa; Gules, Ozay; Sandikci, Mustafa; Kum, Sadiye
    The aim of the study is to determine the protective role of vitamin E on the prostate of rats exposed to bisphenol A (BPA). A total of 40 adult male Wistar Albino rats were used. The rats were randomly divided into five groups as follows: control, sham, vitamin E, BPA, and vitamin E+BPA. The applications of vitamin E (300 IU/kg/day) and BPA (10 mg/kg/day) were proceeded for three weeks. Periodic Acid Schiff (PAS) and Silver-Staining for Nucleolar Organizer Region (AgNOR) methods were applied to prostate sections for histochemical examinations. Also, inducible nitric oxide synthase (iNOS) expression was examined immunohistochemically. The number of AgNOR positive dots and intensity of iNOS expression in glandular epithelial cells of prostate increased in BPA group compared to control group. Also, iNOS expression decreased in vitamin E+BPA group compared to BPA group. On the other hand, a significant difference wasn't found between the groups in terms of PAS reaction. As a conclusion, our findings demonstrate that BPA might stimulate cell proliferation and oxidative changes in prostate. The usage of vitamin E might contribute to reducing oxidative damage induced by BPA in prostate.
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    TLR2 and TLR4 molecules and antigen- presenting cell compositions in cecal tonsils of broiler chicks (Gallus gallus domesticus) in the first two weeks of the post- hatch period
    (John Wiley and Sons Inc, 2022) Eren, Ülker; Kum, Sadiye; Nazlıgül, Ahmet; Güleş, Özay; Aka, Ebru; Yıldız, Mustafa; Zorlu, Seçil
    Chickens do not have lymph nodes. Gut-associated lymphoid tissue is the major immu-nological organization for the digestive system. Cecal tonsils are an important part of this organization. This study is a descriptive and experimental study that was conducted to determine the histological development of the cecal tonsils and the distribution of Toll- like receptor (TLR) 2, TLR4 and antigen- presenting cells during the first 2 weeks of the chick's life. The tissue sections were stained using Crossmon's triple technique, Gordon and Sweet's silver impregnation, and streptavidin- biotin- peroxidase complex methods. The classical tonsil framework with fossa and tonsillar units were observed in 4 days cecal tissue. The web of reticular fibres forming the stroma of the tissue had the impression that the lymphoid cells filling in time. The development of cecal tonsil was completed histologically on the day 10 and following day 14 samples. Regardless of the antigenic stimulation, TLR2, TLR4 and CD83, major histocompatibility complex (MHC) class II molecules are present in proximal cecal tissue. However, CD83- positive dendritic cells in the germinal centre were first distinguished on day 7. Furthermore, the high antigen presentation capacity of the cecum with an intense MHC class II molecule expression was determined. Histological and immunohistochemical findings in this study revealed that both innate and adaptive cecal defence mechanisms were in the learning period during the first 2 weeks. The learning period of innate immunity may require more detailed research. However, the results obtained in this study will be taken into consideration in the vaccination programmes in chicks.