Durrin Ozlem Dabak

The present study investigates the changes in M1/M2 macrophage polarization resulting from unilateral testicular torsion in the bilateral testis. The study sample included 63 male Sprague–Dawley rats, which were randomly divided into nine groups (n = 7): Control, Sham (4 h (4 h), 24 h, 7 days (7d), 14d), and Torsion/Detorsion (T/D) (4 h, 24 h, 7d, 14d). Histopathological evaluations revealed no changes in the Sham groups, while T/D was noted to cause edema, vascular occlusion, disruption of seminiferous tubule epithelial organization, germ cell abnormalities and structural anomalies in the experimental rats, the severity and extent of which increased from 4 h to 14d after T/D. The Cosentino scores used to determine the degree of histological damage were consistent with the histopathological findings in all groups, while the Johnsen scores, as a marker of spermatogenesis, were lower in the T/D groups. Seminiferous tubule diameters and germinal epithelial thickness decreased significantly in parallel with increased tubule damage in the ipsilateral testicles. Testicular torsion significantly affected sperm motility, with significant reductions observed in the T/D 7d and T/D 14d groups. A hormone profile analysis revealed decreased testosterone levels in both the Sham and T/D groups when compared to the Controls. CD68 and CD163 immunoreactivities, as M1 and M2 macrophage surface markers, were determined in the testicular tissue using the avidin–biotin-peroxidase complex method. T/D interventions caused M1/M2 macrophage polarization changes and increased M1 macrophages, particularly in contralateral testicular tissue. The increase in M1 macrophages in contralateral testicular tissue following T/D in the present study suggests that cell processes, including macrophages, may play an important role in contralateral testicular injury.

Background: Extrarenal 1α,25-dihydroxyvitamin D3 (1,25-D) locally produced by immune cells plays crucial roles on the regulation of the immune system. However, in vivo status of extrarenal 1,25-D and 25- hydroxyvitamin D (25-D) in acute inflammatory conditions are unknown. Objective: The aim of this study was to determine extrarenal 1,25-D level in circulation in bilaterally nephrectomized rats induced by low-dose lipopolysaccharide (LPS). Methods: Renal 1,25-D synthesis was terminated through bilateral nephrectomy in rats. The rats received intraperitoneal LPS (50 µg/kg BW) three times and the experiment was ended 24 hours after nephrectomy. Serum 1,25-D, 25-D, calcium, phosphorus, intact parathyroid hormone and calcitonin levels were measured and immunohistochemistry were applied to detect the sources of extrarenal 1,25-D synthesis. Results: Circulatory 1,25-D concentration remarkably increased in the both LPS-treated and non-treated bilaterally nephrectomized rats. Elevated circulatory 1,25-D didn’t have hypercalcemic endocrinal effects. Increased 1,25-D level also resulted in concurrent rapid and dramatic depletion of circulatory 25-D. Conclusions: In conclusion, extrarenal 1,25-D could enter into the systemic circulation and therefore, might have systemic effects besides its autocrin and paracrine functions.

The aim of this study was to investigate the effects of alpha lipoic acid on histopathological results of kidney tissue of mothers exposed to tobacco smoke during pregnancy. Twenty-eight Spraque-Dawley female rats were used. Rats were randomly divided into four groups: control, tobacco smoke (TS), tobacco smoke + alpha lipoic acid (TS+ALA) and alpha lipoic acid (ALA). Rats in the TS and TS+ALA groups were exposed to TS twice a day for one hour starting from eight weeks before mating and during pregnancy. 20 mg/kg of ALA was administered by gavage to ALA and TS+ALA group. The kidney tissues were examined by histological, immunohistochemical and MDA levels. Histopathological findings such as inflammatory cell increase, enlargement Bowman distance and hyaline casts in the tubule lumen were observed in the TS group. ALA application was found to reduce the majority of histopathological findings. VEGF immunoreactivity was significantly increased in the TS group compared to the control group, whereas in the TS+ALA group, VEGF immunoreactivity was significantly lower than TS group. MDA levels were significantly increased in the TS group compared to the control group. As a result, it has been shown that exposure of tobacco smoke during pregnancy causes an increase in histopathologic damage and vascularity in kidney tissues and that alpha lipoic acid has a partially protective effect against this effects.

Amaç: Çalışmamızda gebelikte tütün dumanına maruz kalan anne sıçanların akciğer dokusunda meydana gelen değişiklikler üzerine alfa lipoik asitin etkilerinin deneysel sıçan modeli üzerinde araştırılması amaçlandı. Yöntemler: Çalışmada 28 adet dişi Sprague-Dawley cinsi sıçanlar kullanıldı. Gebe sıçanlar; Kontrol grubu, Tütün dumanı (TD) grubu, Tütün dumanı + Alfa lipoik asit (TD+ALA) grubu ve Alfa lipoik asit (ALA) grubu olmak üzere rastgele dört eşit gruba ayrıldı. TD ve TD+ALA grubundaki sıçanlar çiftleşmeden önce sekiz hafta ve gebelik süresince günde iki saat tütün dumanına maruz bırakıldı. TD+ALA ve ALA grubundaki sıçanlara ise çiftleşmeden önce sekiz hafta ve gebelik süresince gün aşırı oral gavaj yolu ile 20 mg/kg dozunda alfa lipoik asit verildi. Deneyin sonunda sıçanlar dekapite edilerek akciğer dokuları çıkarıldı ve histolojik, biyokimyasal ve immünohistokimyasal metotlar uygulandı. Bulgular: TD grubuna ait akciğer kesitlerinde inflamatuar hücre artışı, konjesyon, ödem, hemoraji gibi histopatolojik bulgular gözlendi. ALA uygulamasıyla bu histopatalojik bulgularda istatistiksel olarak anlamlı oranda düzelmeler izlendi. TD grubunda VEGF immünreaktivitesinin kontrol grubuna göre anlamlı artış gösterdiği, TD+ALA grubunda ise TD grubuna göre VEGF immünreaktivitesinin anlamlı derecede azaldığı belirlendi. TD grubunda MDA değerlerinin kontrole göre anlamlı derecede arttığı, TD+ALA grubunda ise TD grubuna göre anlamlı derecede azaldığı gözlendi. Sonuç: Tütün dumanının gebe sıçan akciğerinde yol açtığı oksidatif hasarın, alfa lipoik asit tedavisinin antioksidan etkileri ile kısmen engellendiği belirlendi.

Background: In incisional hernia patients, collagen type I/III ratio and total collagen density (TCD) emerges a main etiological factor. If they are low, recurrence risk can be high. The aim of this study was to determine the ratio of collagen type I/III and TCD after incisional hernia repair in different layers with polypropylene mesh.Methods: In the study, 40 Wistar Albino rats were used. They were divided into four equal groups: control, preperitoneal, intraperitoneal and onlay. In control group, defect was repaired with prolene suture. In other groups, prolene mesh was placed to the different layers. Incisions were reopened 30 days later, and tissue samples were taken. Samples were stained by double-immunohistochemical methods and examined under light microscope.Results: Collagen type I/III ratio and TCD was highest in preperitoneal group. Intraperitoneal group was the second highest group. There was no difference between onlay and control group for collagen type I/III ratio except TCD. There was a significant correlation between TCD and collagen type I/III ratio in all samples.Conclusions: Mesh repair in different layers has an effect on TCD and collagen type I/III ratio in incisional hernia repair. Preperitoneal layer is better than other layers.

Methotrexate (MTX) is widely used in the treatment of various malignancies and nononcological diseases but its use has been limited by its nephrotoxicity. Silymarin (SLY), a natural flavonoid, has been reported to have antioxidant, anti-inflammatory and anti-apoptotic effects. This study was carried out to determine whether SLY exerts a protective effect against MTX-induced nephrotoxicity. Rats were divided into six groups: Group 1 (saline, i.p., single injection), Group 2 (0.5% carboxymethyl cellulose (CMC), by gavage once daily for five consecutive days), Group 3 (SLY, 300 mg/kg per day, i.p. for five consecutive days), Group 4 (MTX, 20 mg/kg, i.p., single injection), Group 5 (MTX + CMC similarly as groups 2 and 4) and Group 6 (MTX + CMC + SLY similarly as groups 2, 3 and 4). Histopathologic alterations including apoptotic changes of the kidney were evaluated. MTX injection exhibited dilated Bowman’s space, inflammatory cell infiltration, glomerular and peritubular vascular congestion and swelling of renal tubular epithelium cells. Apoptotic cell death was also markedly increased in renal tubules after MTX administration. SLY treatment resulted in statistically significant amelioration in the histological alterations and reduced the number of TUNEL-positive cells as compared with the MTX treated rats (p < 0.05). In conclusion, SLY treatment leads to a reduction on MTX-induced renal damage in rats. Since SLY is safe and acceptable for human consumption, further studies to define the exact mechanism of the protecting effect of SLY on MTX-induced nephrotoxicity and the optimum dosage of this compound would be useful.

The aim of this study was to determine the rate of collagen Type I/Type III for different meshes. Fifty rats were used. Five groups were formed: prolene (n = 10), mersilene (n = 10), parietex (n = 10), e PTFE (n = 10) and control group (n = 10). In all animals, laparotomy was performed using a midline incision. After that four different kinds of meshes are placed into the retro-rectus plane and fixed with a non-absorbable suture. Rectus superficial fascia and skin are closed. In the control group, repairment is done primarily. Thirty days later, meshes are found through the incisions that were done previously. Scar tissues above and near by meshes and also in the control group are taken, and in these tissue samples, the ratio of Type I/III is evaluated histochemically. The Prolene mesh was found to contain more collagen fibers than e PTFE. As a result of the histopathologic evaluation, it was seen that Group I contained statistically significantly more collagen density than the other four groups (p < 0.05). Moreover, the collagen Type I/III ratio in the specimen taken from the top part and the surrounding area of Group I was found significantly higher than the collagen Type I/III ratios of the rest of the groups (p < 0.05). As a conclusion, the ratio of collagen Type I/III is the highest in the prolene group.