Yazar "Etyemez, Muhammed" seçeneğine göre listele
Listeleniyor 1 - 14 / 14
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Ameliorative Effects of Oleuropein on Lipopolysaccharide-Induced Acute Lung Injury Model in Rats(Springer/Plenum Publishers, 2021) Dikmen, Nursel; Cellat, Mustafa; Etyemez, Muhammed; Isler, Cafer Tayer; Uyar, Ahmet; Aydin, Tuba; Guvenc, MehmetAcute lung injury (ALI) is one of the most common causes of death in diseases with septic shock. Oleuropein, one of the important components of olive leaf, has antioxidant and anti-inflammatory effects. The objective of this study was to investigate the effects of oleuropein on lipopolysaccharide (LPS)-induced ALI in rats. Oleuropein was administered to rats at a dose of 200 mg/kg for 20 days and LPS was given through intratracheal administration to induce ALI. The study was terminated after 12 h. The results showed that in the group treated with oleuropein, inflammatory cytokines and oxidative stress decreased in serum, bronchoalveolar lavage fluid (BALF), and lung tissue, and there were significant improvements in the picture of acute interstitial pneumonia (AIP) caused by LPS in histopathological examination. Based on the findings of the present study, oleuropein showed protective effects against LPS-induced ALI.Öğe Bisphenol AF Caused Reproductive Toxicity in Rats and Cineole Co-Treatment Exhibited Protective Effect(Springer Heidelberg, 2024) Uyar, Ahmet; Cellat, Mustafa; Kanat, Ozgur; Etyemez, Muhammed; Kutlu, Tuncer; Deveci, Mehmet Zeki Yilmaz; Yavas, IlkerBisphenol AF (BPAF) is increasingly used and now found in products intended for human consumption. The protective effect of 1,8-cineole (CIN) against BPAF-induced reproductive toxicity was investigated. Four groups were created, with each group consisting of eight rats: control, BPAF (200 mg/kg), CIN (200 mg/kg), and BPAF + CIN groups. The results demonstrated that the BPAF group exhibited a decline in testosterone levels and a decrease in sperm parameters compared with the control. Additionally, higher levels of MDA were observed, along with lower levels of GSH and GPx activity. CAT activity also decreased slightly. Tnf-alpha, Nf-kappa B levels were significantly higher, and caspase-3 expression was elevated, while PCNA expression decreased. BPAF significantly increased tissue degeneration compared with the control. However, the BPAF + CIN group showed statistically significant improvements in sperm parameters, except for concentration. They also exhibited an increase in testosterone levels and an improvement in MDA and GSH levels compared with the BPAF group. However, GPx activity partially enhanced. Tnf-alpha and Nf-kappa B levels were significantly reduced, and caspase-3 levels declined while PCNA and Bcl-2 levels increased. The Johnsen Testicular Biopsy score showed a substantial increase. Overall, these results suggest that CIN co-treatment in rats enhanced reproductive health and exhibited antioxidant, antiapoptotic, and anti-inflammatory properties against BPAF-induced testicular damage.Öğe Carvacrol showed a curative effect on reproductive toxicity caused by Bisphenol AF via antioxidant, anti-inflammatory and anti-apoptotic properties(Pergamon-Elsevier Science Ltd, 2023) Uyar, Ahmet; Cellat, Mustafa; Kanat, Ozgur; Etyemez, Muhammed; Kutlu, Tuncer; Deveci, Mehmet Yilmaz Zeki; Yavas, IlkerBisphenol AF (BPAF) is an endocrine disruptor, and human exposure to these chemicals is growing in industrialized nations. BPAF has been demonstrated in studies to have toxic effects on reproductive health. This study examined the effects of oral exposure to BPAF on the reproductive system and the protective effects of carvacrol in rats. From 32 Wistar albino rats, four separate groups were set up for this purpose. Carvacrol 75 mg/kg and BPAF 200 mg/kg were administered by oral gavage method. Rat sperm parameters and serum testosterone levels were measured after 28 days of administration. The study looked at the MDA in the testis tissues, as well as CAT, GPx, and GSH as antioxidants parameters, NF-& kappa;B and TNF-& alpha; as inflammatory markers, caspase-3 and Bcl-2 as apoptosis parameters, and PCNA as cell proliferation markers. In addition, testis tissues underwent histological evaluation. As a result, in rats exposed to only BPAF, sperm counts declined, testosterone levels reduced, oxidative stress, inflammation, and apoptosis increased, and cell proliferation decreased. Furthermore, severe disruptions in tissue architecture and decreased spermatogenesis were reported. In contrast, sperm parameters improved, testosterone levels increased, oxidative stress and inflammation decreased, and apoptosis was prevented in the carvacrol-treated group compared to the BPAF-only group. It was also found that spermatogenesis was maintained, and structural abnormalities in testicular tissue were mostly avoided with an increase in PCNA expression. According to the findings, despite BPAF-induced testicular and reproductive toxicity, carvacrol had therapeutic potential due to its anti-inflammatory, antioxidant, cell proliferation-increasing, and anti-apoptotic activities.Öğe Determination of The Effects of 2,4-Dichlorophenoxy Acetic Acid on Hematological Parameters in Rats Given Alcohol(2020) Başeğmez, Mehmet; Etyemez, Muhammed; Durmuş, İbrahim; Eryavuz, AbdullahIn modern agriculture, many compounds such as pesticides, herbicides and various kinds of fertilizers are frequently used inthe fields to increase crop production. However, among these compounds, widespread usage of synthetic herbicides foragricultural purpose has an adverse effect on living organisms and can lead to several hematological and neurologicalcomplications in human and animals. Alcohol consumption is one of the potential risk factors in cardiovascular disease. Theaim of this study is to investigate the effects of 2,4-dichlorophenoxy acetic acid (2.4-D), used commonly by farmers as aherbicide, on hematological changes in rats given alcohol. Totally 28 Sprague Dawley male rats were randomly divided intofour groups containing 7 animals per group. While first group served as a control, experimental groups were as follows;herbicide group (5 mg/kg, 2,4- D, orally), alcohol group (3 mg/kg ethyl alcohol, orally), herbicide plus alcohol group (5mg/kg 2,4-D and 3 mg/kg ethyl alcohol, orally). In the end of experimental period lasted totally 60 days, the blood sampleswere taken from animals by cardiac puncture under anesthesia. In the blood samples, erythrocyte (RBC), total leukocytes(WBC) and percentage of the different white blood cells, hematocrit value (HCT), hemoglobin concentration (HGB) andplatelet counts (PLT) were determined. 2,4-D increased the WBC, percentage of lymphocyte, monocyte and granulocytenumbers. Alcohol and alcohol plus 2,4-D application reduced RBC numbers, HGB, HCT value and PLT concentration.The mean corpuscular hemoglobin level (MCH) was increased by alcohol, 2.4 D and alcohol plus 2.4 D treatments. Weconcluded that 2,4-D application in rats given alcohol leads to changes in hematological parameters.Öğe The effect of tyrosol on diclofenac sodium-induced acute nephrotoxicity in rats(Wiley, 2024) Comez, Mehmet; Cellat, Mustafa; Kuzu, Muesluem; Uyar, Ahmet; Turk, Erdinc; Kaya, Yusuf Selim; Etyemez, MuhammedAlthough diclofenac (DCF) is a nonsteroidal anti-inflammatory drug that is considered safe, its chronic use and overdose may show some toxic effects. The protective effect of tyrosol (Tyr) pretreatment against DCF-induced renal damage was investigated in this study. The 32 rats used in the study were randomly divided into four groups of eight rats each. According to the data obtained, it was determined that creatinine, urea, and blood urea nitrogen (BUN) levels increased in serum samples of the DCF group. Besides, the levels of reduced glutathione (GSH) and glutathione peroxidase (GPx) activity decreased and the malondialdehyde (MDA) level increased in the kidney tissue. However, no change was observed in catalase (CAT) activity. Cyclooxygenase-2 (COX-2), nuclear factor kappa B (NF-kappa B), and tumor necrosis factor-alpha (Tnf-alpha) levels increased and nuclear factor erythroid 2-related factor 2 (Nrf-2) levels decreased. No change was detected in the level of interleukin 1 beta (IL-1 beta). When the DCF+Tyr group and the DCF group were compared, it was assessed that Tyr had a curative effect on all biochemical parameters. Also, kidney damages, such as degeneration and necrosis of tubular epithelium and congestion of veins, were obviated by treatment with tyrosol in histopathological examinations. It was determined that Tyr pretreatment provided a protective effect against nephrotoxicity induced by DCF with its anti-inflammatory and antioxidant properties.Öğe The effect of vitamin E administration to dairy cows in the prepartum period on some metabolic, oxidative, and reproductive parameters(Sivar-Soc Italiana Veterinari Animali Reddito, 2022) Yenilmez, Kudret; Atalay, Hasan; Cellat, Mustafa; Etyemez, Muhammed; Atmaca, Gizem; Gursel, Feraye EsenThe purpose of this study was to investigate how vitamin E affected oxidative stress, metabolic biomarkers, and reproductive parameters in cows during late gestation. The study used forty healthy, multiparous cows in late gestation. The animals were divided into two groups, control (n.20) and experimental (n:20) group, ten (+/- 5) days before birth. On the same day, 10 ml of blood sample was drawn from each animal's tail vein, and the cows in the experimental group received 3000 mg of vitamin E (DL-alpha-tocopherol acetate) intramuscularly, whereas the cows in the control group received 20 ml of 0.9% NaCl. On calving day and on the 15th day after the calving, blood samples were taken again. The serums of the blood samples taken were separated and stored at -80 C until the analysis. Malondialdehyde (MDA), Glutathione Peroxidase (GSH-Px), Catalase (CAT), Glutathione (GSH), Glucose (GLU), Triglyceride ( TG), Cortisol (COR), Glutamic Oxaloacetic Transaminase (GOT), Gamma Glutamyl Transferase (GGT) and Glutamic Pyruvic Transaminase (GPT) in the samples were measured. Calving - first estrus, calving - first insemination, calving-conception, and artificial insemination per pregnancy were recorded to determine the reproductive performance of the cows involved in the study. Vitamin E administration to cows during the peripartum period was found to boost GSH and GSH-Px levels at birth while decreasing GPT levels (p<0.05). Furthermore, the period of calving-first estrus, calving-first insemination, and calving-conception was shortened compared to the control group, however this was not statistically significant (p>0.05). Vitamin E was proven to be useful in lowering birth stress and protecting the liver when given to cows in late gestational stages. It is thought that it may also be effective in improving reproductive parameters, but the study should be replicated with more animals.Öğe The effects of safranal against bisphenol AF on some reproductive parameters in male new zealand rabbits(2022) Etyemez, Muhammed; Gülay, Mehmet ŞükrüBisphenol AF (BPAF) is used as an analog of the endocrine disruptor Bisphenol A (BPA), whereas safranal is a powerful antioxidant obtained from the saffron plant. In the current study, the possible effects of BPAF and Safranal on some spermatological parameters, reproductive hormones, oxidant/antioxidant enzymes, and histopathological parameters were investigated. A total of 24 male New Zealand rabbits were divided into 4 groups (n= 6 for each group). The groups and the treatments they received by oral gavage for 9 weeks are as follows: The control group received by oral gavage 1 ml/day of corn oil, the BPAF group received by oral gavage 20 mg/kg/day of bisphenol AF, the Safranal group received by oral gavage 100 mg/kg/day safranal, and the treatment group received by oral gavage 20 mg/kg/day bisphenol AF and 100 mg/kg/day safranal. Although the spermatological parameters (sperm concentration, ejaculate volume, progressive motility, ejaculate weight, seminal plasma total protein, and pH) prior to the experiment revealed no differences among the groups, BPAF treatment reduced sperm quantity and motility at the end of the study. BPAF treatments also had a negative impact on testicular MDA and GSH levels. It also caused seminiferous tubule degeneration in testicular tissue. On the other hand, the administration of safranal with BPAF decreased estrogen levels while increasing sperm concentration and motility to control group levels. Thus, the results suggested that safranal could have a beneficial effect in reducing BPAF-induced tissue damage. In conclusion, BPAF may have potentially harmful to the male reproductive system and safranal may exhibit a protective effect against BPAF exposure.Öğe Investigation of the effects of safranal on the experimentally created rheumatoid arthritis model in rats(Wiley, 2022) Cellat, Mustafa; Isler, Cafer T.; Kutlu, Tuncer; Kuzu, Muslum; Etyemez, Muhammed; Alakus, Halil; Guvenc, MehmetRheumatoid arthritis (RA) is a systemic chronic disease characterized by inflammation and synovitis. More effective treatment methods with less side effects need to be developed. In this context, current study investigated the therapeutic effects of safranal in a model of complete Freund's adjuvant (CFA)-induced RA. The control group was given 1 ml of saline orally starting from the 8th day, and 0.2 ml of CFA was given to the RA, RA + Safranal and RA + Methotrexate (MTX) groups on the 0th day of the experiment. Starting from the 8th day of the experiment, 1 ml of saline was given to the RA group, safranal was given at 200 mg/kg of body weight to the RA + MTX group, and 3 mg/kg of MTX to the RA + MTX group twice a week. The results showed that weight gain decreased in the RA group compared to the control group while arthritis index score, thymus index, and planter temperature were found to be increased. Additionally, a deterioration in blood parameters, an increase in alanine aminotransferase, aspartate aminotransferase, urea, creatinine, C-reactive protein, and malondialdehyde levels, and a decrease in reduced glutathione levels and glutathione peroxidase and catalase (CAT) activities were seen while tumor necrosis factor-alpha, interleukin-6 (IL-6), cyclooxygenase-2, nuclear factor kappa B levels were found to be increased. However, the safranal had a regulatory effect on all the values, except IL-6 and CAT, and blood parameters. Moreover, histopathological examination revealed that safranal reduced inflammatory cell infiltration and edema.Öğe Investigation of the efficacy of tyrosol on doxorubicin-induced acute cardiotoxicity in rats(2022) Cellat, Mustafa; Etyemez, MuhammedAim: In this study, it was aimed to investigate the efficacy of tyrosol on cardiotoxicity induced by doxorubicin. Materials and Methods: Rats were divided into 4 groups and each group included 8 rats. Groups 1 and 2 were given 1 ml of physiological saline, while groups 3 and 4 were given 20 mg/kg of tyrosol. In saline and tyrosol administrations, the oral gavage method was used. In addition, a single dose of 15 mg/kg dose of doxorubicin was administered intraperitoneally to group 2 and group 4 on the 12th day of the trial. On the 14th day of the experiment, serum and tissue samples were taken from the anesthetized rats and then euthanized. Serum creatine kinase MB and creatine kinase activities were analyzed. Heart tissues were extracted, and histological and oxidative stress characteristics were measured in these tissues. Heart tissue malondialdehyde and reduced glutathione levels, catalase and glutathione peroxidase activities were assessed spectrophotometrically. Results: Tyrosol pretreatment inhibited doxorubicin-induced increase in heart tissue malondialdehyde level (p<0.05), the decrease in reduced glutathione level and glutathione peroxidase enzyme activity, and suppressed doxorubicin-induced oxidative stress in the heart tissue. In terms of cardiac tissue catalase enzyme activity, no differences were found between the groups. Because of the reduction in oxidative damage in the heart, the serum creatine kinase MB and creatine kinase activity decreased dramatically (p<0.05). Furthermore, it was discovered that tyrosol pretreatment reduced the histopathological lesions caused by doxorubicin in cardiac tissue. Conclusion: It is thought that the administration of tyrosol may reduce the cardiotoxicity caused by doxorubicin.Öğe Protective effect of Smilax excelsa L. pretreatment via antioxidant, anti-inflammatory effects, and activation of Nrf-2/HO-1 pathway in testicular torsion model(Wiley, 2022) Cellat, Mustafa; Isler, Cafer Tayer; Uyar, Ahmet; Kuzu, Muslum; Aydin, Tuba; Etyemez, Muhammed; Turk, ErdincThe protective effects of the ethanol extract of Smilax excelsa L. (SE) leaves were investigated on testicular tissue of rats with a torsion model in this study. The chemical composition of the extract was detected by means of liquid chromatography with tandem mass spectrometry (LC-MS/MS). SE extract was given for 21 days before torsion was created in the treatment group. The sperm parameters of the torsion group were impaired, and there was an increase in MDA level as well as a decrease in GSH level and GPx activity compared to the control group. TNF-alpha and NF-kappa B levels in the torsion group increased as compared to those in the control group. The expression levels of Nrf-2 and HO-1 were lower in the torsion group than those in the control group. The SE pretreatment group has improved sperm, oxidative stress, and inflammatory markers when compared to the torsion group, and the Nrf-2/HO-1 pathway was activated. Practical applications Smilax excelsa L. is a plant with economic value used in traditional medicine in the treatment of stomachache, bloating, and breast cancer in Northwest Anatolia. It has an antioxidant effect due to the flavonoids and anthocyanins it contains. The protective effect against ischemia-reperfusion-induced tissue and reproductive damage in testicular tissue were demonstrated with the study. When the histological examinations of the tissues were evaluated, it was found that morphological structure of the tissues was retained in the treatment group. The findings indicate that SE prevents tissue damage in the torsion model by antioxidant and anti-inflammatory effects and activating Nrf-2/HO-1 pathway.Öğe Ratlarda Siklofosfamid ile Oluşturulan Anemi Modelinde Zeytin Yaprağı Ekstraktının Etkilerinin Araştırılması(2023) Güvenç, Mehmet; Etyemez, MuhammedSiklofosfamid (CP), kanser, multipl skleroz ve romatoid artrit gibi hastalıkların tedavisinde kullanılan ve çeşitli organ hasarları, kemik iliği toksisitesi ve hematopoietik disfonksiyon gibi yan etkilere neden olduğu için kullanımı sınırlı olan bir ilaçtır. Bu çalışmada ratlarda siklofosfamid uygulamasının neden olduğu anemiye karşı zeytin yaprağı ekstraktının (ZYE) koruyucu etkilerinin araştırılması amaçlandı. Çalışma toplam 28 gün sürdü. Bu amaçla anemi modeli oluşturulan grupta 50 mg/kg dozda, haftada bir kez ve intramusküler olarak CP uygulaması yapıldı. Tedavi grubunda ise oral gavaj yöntemi ile 400 mg/kg dozda ZYE uygulaması yapıldı. Çalışma sonunda hematolojik analizlerde alyuvar (RBC), akyuvar (WBC), hemoglobin konsantrasyonu (HGB), hematokrit değer (HTC), ortalama alyuvar hemoglobini (MCH), ortalama alyuvar hacmi (MCV), eritrosit dağılım genişliği (RDW) gibi parametreler incelendi. Serum örneklerinde ise malondialdehid (MDA) ve redükte glutatyon (GSH) düzeyleri ile katalaz (CAT) ve glutatyon peroksidaz (GSH-Px) enzim aktiviteleri spektrofotometrik yöntemle analiz edildi. CP uygulamasının kan RBC (P<0.01), HGB (P<0.001) ve HTC (P<0.001) parametrelerinde istatistiki açıdan anlamlı azalmalara neden olduğu belirlendi. Ayrıca bu uygulamanın serum MDA (P<0.05) düzeyinde artışa, GSH (P<0.05) düzeyi ve CAT (P<0.05) ve GSH-Px (P<0.01) enzim aktivitelerinde azalmaya sebep olarak oksidatif stres oluşturduğu tespit edildi. Zeytin yaprağı ekstrakt tedavisinin ise CP’nin neden olduğu oksidatif hasarı önlediği, ayrıca RBC, HGB ve HTC değerlerindeki azalmanın önüne geçtiği ve anemiye karşı koruyucu etkiler gösterdiği belirlendi.Öğe Safranal's therapeutic effects in rat models of polycystic ovary syndrome(Springernature, 2024) Cellat, Mustafa; Kuzu, Muslum; Guvenc, Mehmet; Yuksel, Murat; Kanat, Ozgur; Bozkurt, Yesim Akaydin; Etyemez, MuhammedPolycystic ovary syndrome is one of the leading causes of female infertility in reproductive age. In this work, the protective effects of safranal against letrozole-induced polycystic ovary syndrome in rats were examined. For this purpose, 32 Wistar albino female rats were split into four groups. Each group received the following treatments for 21 days: Group 1 received carboxymethylcellulose (1%, 2 ml/kg); Group 2, letrozole (1 mg/kg), Group 3, safranal (200 mg/kg); and Group 4 letrozole and safranal via oral gavage. We identified estrus cycles in the rats and analyzed various parameters in their serum and ovarian tissues, as well as histopathologic findings. The parameters studied included C-reactive protein, glucose, total cholesterol, triacylglyceride, high-density lipoprotein, low-density lipoprotein, follicle-stimulating hormone, estradiol, and luteinizing hormone levels in serum. Additionally, the study measured malondialdehyde, glutathione, glutathione peroxidase, and catalase levels in ovarian tissue. We also examined tumor necrosis factor-alpha, interleukin-6, and interleukin-1beta parameters in serum and ovarian tissues, as well as nuclear factor erythroid 2-related factor-2 and heme oxygenase-1 protein levels. In the letrozole group, the estrus cycle was disrupted, and all parameters, except for glutathione and glutathione peroxidase, showed impairments compared to the control group. The findings showed that glucose, triacylglyceride, catalase, and heme oxygenase-1 levels slightly improved after safranal treatment, however, other parameters showed statistically significant improvements. Furthermore, safranal treatment reduced the development of cystic follicles while preserving tissue architecture, as revealed by histopathologic findings. Based on the results obtained, it may be argued that safranal's antioxidant and anti-inflammatory properties, along with its ability to regulate sex hormone levels and manage dyslipidemia, make it a promising solution for patients with polycystic ovary syndrome.Öğe Tyrosol improves ovalbumin (OVA)-induced asthma in rat model through prevention of airway inflammation(Springer, 2021) Cellat, Mustafa; Kuzu, Muslum; Isler, Cafer Tayer; Etyemez, Muhammed; Dikmen, Nursel; Uyar, Ahmet; Gokcek, IshakAsthma is an inflammatory disease that affects many people around the world, especially persons at paediatric age group. The effectiveness of tyrosol, a natural phenolic compound, was examined in the asthma model induced by ovalbumin (OVA). For this purpose, four groups, each consisting of eight rats, were arranged. For 21 days, physiological saline solution was treated to the control group and OVA was treated to the groups of OVA, OVA + dexamethasone (Dexa) and OVA + tyrosol groups, intraperitoneally and through inhalation. Additionally, 0.25 mg/kg Dexa was treated to the OVA + Dexa group and 20 mg/kg tyrosol to the OVA + tyrosol group by oral gavage. Serum, blood, bronchoalveolar lavage fluid (BALF) and lung tissues of the rats were examined. It was observed that MDA level decreased, GSH level and GPx activity increased, and there was no change in CAT activity in lung tissues of the tyrosol treatment groups. It was also observed that NF-kappa B, TNF-alpha, IL-4, IL-5, IL-13, IFN-gamma and IgE levels decreased compared to the OVA group in lung tissue and serum samples except for serum NF-kappa B and IL-4. However, no effect on IL-1 beta level was observed. In addition, it was determined that tyrosol treatment increased the IL-10 level on both tissue samples. The results of the histopathological investigation of lung tissue showed that tyrosol significantly ameliorated OVA-induced histopathological lesions. Additionally, PAS staining showed that mucus hypersecretion was significantly reduced with the use of tyrosol. In addition, it was determined that the number of eosinophils decreased significantly in blood and BALF samples. The obtained results showed that tyrosol possessed antioxidant and anti-inflammatory features on OVA-induced rats and preserved tissue architecture.Öğe Tyrosol improves ovalbumin (OVA)-induced asthma in rat model through prevention of airway inflammation (Jul, 10.1007/s00210-021-02117-y, 2021)(Springer, 2021) Cellat, Mustafa; Kuzu, Muslum; Isler, Cafer Tayer; Etyemez, Muhammed; Dikmen, Nursel; Uyar, Ahmet; Gokcek, Ishak[Abstract Not Available]
