https://hdl.handle.net/20.500.12809/219 Sun, 05 Apr 2026 19:35:10 GMT 2026-04-05T19:35:10Z https://hdl.handle.net/20.500.12809/10579 Comparison of proliferation and osteogenic differentiation potential of bovine adipose tissue and bone marrow derived stem cells Özden Akkaya, Özlem; Dikmen, Tayfun; Nawaz, Shah; Kibria, ASM Golam; Altunbaş, Korhan; Yağcı, Artay Bone marrow derived stem cells (BMSC) are the most utilized cell type in the field of bone regeneration. Although BMSC are both safe and efficacious, the search for alternative sources for stem cells continues. We investigated bovine BMSC and adipose tissue derived mesenchymal stem cells (ATSC) using immunofluorescence and PCR. We further compared the osteogenic differentiation potentials of both sources of stem cells. We assessed alkaline phosphatase (ALP) enzyme levels and calcium deposition in differentiating cells at days 7, 14 and 21 to compare the osteogenic differentiation capability of both cell types. We found that ATSC expressed significantly higher ALP levels compared to BMSC throughout osteogenic differentiation. Calcium deposition was greater in ATSC than BMSC at days 7 and 14. By the end of day 21, BMSC produced greater calcium deposition. We found that ATSC undergo osteogenic differentiation more rapidly than BMSC, but BMSC provide greater mineralization over longer periods. Sun, 01 Jan 2023 00:00:00 GMT https://hdl.handle.net/20.500.12809/10579 2023-01-01T00:00:00Z https://hdl.handle.net/20.500.12809/10498 Comparison of the blood gas analyser Edan i15 Vet with the blood gas analyser Gem Premier 3000 for the analysis of blood gases, electrolytes, hemoglobin and hematocrit in lactating Holsteins Mert, Metin; Aksoy, Kemal; Pekmezci, Aytaç; Deniz, Abdülkerim A point-of-care blood gas analyser, Edan i15 Vet (EDAN), was compared with a benchtop blood gas analyser, GEM Premier 3000 (GEM). GEM and EDAN were used to analyse whole blood from 123 lactating Holsteins within one month of calving for blood gases, electrolytes, hematocrit and hemoglobin. EDAN and GEM showed significant linear correlations for blood gases, electrolytes, Hct and Hb. The 95% confidence intervals (CI) of intercept in Passing-Bablok regressions included zero in pCO2, bicarbonate, TCO2, BE ecf, BE B, hematocrit, and pH, but not for Na+, K+, pO2 and sO2. The CI of the slope included 1.0 for Na+, K+, pCO2, bicarbonate, TCO2, BE ecf, BE B, hematocrit, and pH, but not for pO2, sO2, and hemoglobin. The Bland-Altman plots between EDAN and GEM showed a bias of 1.4% for Na+, 2.4% for K+, -1.6% for pCO2, 3.0% for pO2, -5.3% for bicarbonate, 2.8% for SO2, -7.3% for TCO2, 10.4% for Hct, 21.2% for Hb, -25.1% for BE B and -38.5% for BE ecf. The biases in the analysis of certain estimated parameters were much higher (> 5%) than for measured parameters except for Hct. Parity did not correlate with blood gas parameters but blood pH correlated negatively with K+, pCO2 and positively with pO2, TCO2, sO2, bicarbonate, BE ecf and BE B. The postpartum time correlated positively with pCO2, TCO2, BE and bicarbonate and negatively with Hct and Hb values. Reference values (2.5-97.5% quartiles) were determined for each parameter. Conclusively, EDAN can be used interchangeably with GEM for the analysis of blood pH, K+, pCO2 and HCO3- as they show acceptable moderate agreement. However, they did not agree for other parameters such as TCO2, BE ecf, BE B, Hb, Hct, sO2, Na+, and pO2, therefore, reference values for each parameter were set for GEM and EDAN. Sun, 01 Jan 2023 00:00:00 GMT https://hdl.handle.net/20.500.12809/10498 2023-01-01T00:00:00Z https://hdl.handle.net/20.500.12809/10437 Measuring the Effects of Detomidine and Medetomidine Alone and in Combination with Ketamine on Tear Production and Intraocular Pressure in Common Buzzards (Buteo buteo) Bozkan, Zeynep; Yaygıngül, Rahime; Bulut, Osman; Belge, Ali The purpose of this study was to measure the effects of detomidine and medetomidine alone or in combination with ketamine on Schirmer tear test I (STT I) results and intraocular pressures (IOPs) in the common buzzard (Buteo buteo). Fourteen ophthalmologically healthy common buzzards were randomly assigned to 1 of 2 α-2 adrenoreceptor agonist groups: a detomidine group (group 1) and a medetomidine group (group 2). The detomidine group had 2 subgroups, detomidine alone or in combination with ketamine. Similarly, the medetomidine group had 2 subgroups, medetomidine alone or in combination with ketamine. Five minutes after α-2 adrenoreceptor agonist administration, the first measurements of STT I and IOP were collected. Ketamine was injected intramuscularly immediately after the first measurements were recorded. Schirmer tear test I and IOP measurements were repeated 5 minutes after ketamine administration. Measurements were obtained for 3 subgroups per agonist grouping: baseline 1, detomidine alone and detomidine with ketamine for group 1, and baseline 2, medetomidine alone and medetomidine with ketamine for group 2. Both IOP and STT I decreased significantly after sedation, anesthesia, or both. Intraocular pressure was significantly lower in the detomidine-ketamine group compared with the detomidine alone group. The IOP and STT I significantly decreased in both the medetomidine alone and medetomidine-ketamine groups when compared with those for all 14 unanesthetized animals before administering the α-2 adrenoreceptor agonist and ketamine. When α-2 adrenoreceptor agonists were considered as a single group (groups 1 and 2 combined), IOP also showed a significant decrease in the α-2 adrenoreceptor agonist-ketamine groups compared with the α-2 adrenoreceptor agonists alone, but STT I did not. According to the results obtained from these common buzzards, no statistical differences were found between the detomidine and medetomidine (alone) groups or detomidine-ketamine and medetomidine-ketamine groups in terms of STT I and IOP. Sat, 01 Jan 2022 00:00:00 GMT https://hdl.handle.net/20.500.12809/10437 2022-01-01T00:00:00Z https://hdl.handle.net/20.500.12809/10391 KONTRASTLA İNDÜKLENEN NEFROPATİNİN TAVŞAN MODELİNDE CURCUMİNİN KORUYUCU ETKİSİNİN ARAŞTIRILMASI Sarıtaş, Zülfikar Kadir; Sarıtaş, Hazen; Korkmaz, Musa; Demirel, H. Hüseyin; Bülbül, Aziz; Sarıtaş, Tuba Berra; Görücü, Fatma Tavşanlarda curcuminin kontrast nefropatisi üzerine etkilerinin araştırılması.GEREÇ VE YÖNTEM: Bu çalışmada 14 yetişkin, 2,5-3 kg beyaz erkek Yeni Zelanda tavşanı rastgele 3 gruba ayrıldı. Gruplar kontrol grubu (n=2), kontrastla indüklenen nefropati grubu (n=6) ve Curcumin grubundan (n=6) oluşturuldu. Curcumin grubunda kontrast madde verilmesinden bir gün önce ve kontrast maddenin verildiği gün 500 mg/kg Curcumin gastrik gavaj ile uygulandı. İopromid kontrast nefropatisini oluşturmak için 30 dakikalık süre boyunca Vena auricularis marginalise bir katater yerleştirilerek 8 g/kg dozda intravenöz olarak enjekte edildi. Kontrastla indüklenen nefropati grubunda Miyeloperoksidaz düzeyi 0. Saatte 4,899±0,424ng/ml bulunurken 48 saat sonra anlamlı bir artış (7,467±0.353 ng/ml) gözlendi (p=0,002). Kontrastla indüklenen nefropati grubunda glomerüllerin vakuolizasyonu, tübüler epitel hücrelerinin vakuoler dejenerasyonu, hiyalin silindirleri ve tübül lümeninde tübüler nekroz Curcumin grubuna göre istatistiksel anlamlı olarak yüksekti (P=0,000). Bu sonuçlara dayanarak, güçlü bir antioksidan olan Curcuminin 24 ve 48 saat sonra kontrastla indüklenen nefropatiye karşı önemli bir koruyucu etkiye sahip olduğu sonucuna varıldı. Bu nedenle kontrast maddelerin kullanılmasından önce Curcumin uygulanması, seçilmiş vakalarda kontrastla indüklenen nefropatiyi önlemek için yararlı olabilir.; To evaluate the effects of curcumin on contrast nephropathy in rabbits.MATERIAL AND METHODS: In this study, 14 adult, 2.5-3 kg white male New Zealand rabbits were randomly divided into 3 groups. Goups consisted of the control group (n=2) consisted of the contrast-induced nephropathy group (n=6) and the Curcumin group (n=6). In the curcumin group, curcumin was administered via gastric gavage at a dose of 500 mg/kg one day before and on the day of contrast agent administration. Iopromide was injected intravenously at a dose of 8 g/kg via a catheter in the V. auricularis marginalis over a period of 30 minutes at a slow rate to induce contrast nephropathy. Myeloperoxidase was 4,899 ± 0,424 ng/ml at hour 0 in the contrast-induced nephropathy group and a significant increase was observed after 48 hours (7.467 ± 0.353 ng/mL) (p=0.002). In the contrast-induced nephropathy group, vacuolization of the glomeruli, vacuolar degeneration of the tubular epithelial cells, hyaline casts, necrotic tubular epithelial cells in the tubules was statistically higher compared to the curcumin groups (P=0.000). Based upon these results, it was concluded that curcumin, which is a strong antioxidant, had a significant protective effect against contrast-induced nephropathy after 24 and 48 hours. Therefore, the administration of curcumin before the contrast material administration may be beneficial to prevent nephropathy in selected cases Sat, 01 Jan 2022 00:00:00 GMT https://hdl.handle.net/20.500.12809/10391 2022-01-01T00:00:00Z