Yazar "Uzun, Hafize" seçeneğine göre listele
Listeleniyor 1 - 4 / 4
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe The effect of mesenchymal stem cell use on intra-abdominal adhesions in a rat model(Korean Surgical Society, 2018) Karaca, Gokhan; Pehlivanli, Faruk; Aydin, Oktay; Altunkaya, Canan; Uzun, Hafize; Niyaz, Mehmet; Bulut, HuriPurpose: Intra-abdominal adhesions (IAA) are among the most frequently seen pathologies in general surgery practice with an increased morbidity and mortality. In the present study, we investigated the effect of locally applied mesenchymal stem cells (MSCs) on IAA. Methods: Twenty-four Wistar Albino rats were used in the study. The rats were divided into three groups including: Sham, control, and MSCs group. On day 0, cecum was reached under anesthesia in all groups, except the Sham group. Scraping with a sponge was performed until petechial bleeding occurred. The control group received no treatment. In the stem cell group, MSCs were applied topically immediately after surgery on adhesions. The rats were sacrificed on day 10 and colon tissues and blood samples were collected for macroscopic, histopathological, and biochemical analysis. Results: In our study, E-selectin, P-selectin, TNF-alpha and IL-1 levels were statistically significantly lower in the MSC group than the control group, while the sham group has the lowest levels. In both the macroscopic and histopathological analyses (ZUhlke's scale), the least amount of adhesion was observed in the Sham group. In addition, although there was less adhesion in the MSC group than the control group, the difference did not reach statistical significance. Conclusion: Topical MSC application immediately after surgery suppresses the inflammatory process. However it was found to be ineffective in histopathological and macroscopic examinations performed on the 10th day.Öğe Effectiveness of thymoquinone, zeolite, and platelet-rich plasma in model of corrosive oesophagitis induced in rats(Korean Surgical Society, 2017) Karaca, Gokhan; Aydin, Oktay; Pehlivanli, Faruk; Altunkaya, Canan; Uzun, Hafize; Guler, OsmanPurpose: The effectiveness of platelet-rich plasma (PRP), thymoquinone, and zeolite-in corrosive esophageal burns was investigated in a rat model. Methods: Four groups were comprised as containing 10 rats in each group. For group I, oesophagitis was induced and no other procedure was performed (control group). For group II, oesophagitis was induced and thymoquinone was administered for 1 week via oral gavage once a day (thymoquinone group). For group III, oesophagitis was induced for 1 week via oral gavage once a day (PRP group). For group IV, oesophagitis was induced and zeolite was administered for 1 week via oral gavage once a day (zeolite group). On the 10th day, the rats were sacrificed under anaesthesia and venous blood sampling was performed from the vena portae. The oesophaguses were totally excised.-Biochemically, interleukin. (IL)-1B, IL-6, TNF-alpha, and MCP-1 were examined from venous blood. Inflammation score was evaluated histopathologically in oesophageal tissue that was collected. Results: There was a statistically significant difference among groups in terms of IL-1, IL-6, MCP levels, compared to the control group; median IL-1, IL-6, MCP levels of thymoquinone, PRP, and zeolite groups were statistically significantly' lower. There was a statistically significant difference among groups in terms of inflammation scores, compared to group I; median inflammation scores of groups II, III and IV were statistically significantly lower thymoquinone. Conclusion: PRP, and zeolite exhibited positive effect on recovery in oesophagitis by reducing inflammation in the involved segment.Öğe EFFECTS OF THYMOQUINONE, ZEOLITE AND PLATELET RICH PLASMA ON THE HEALING OF ISCHEMIC COLONIC ANASTOMOSIS(2019) Pehlivanlı, Faruk; Karaca, Gökhan; Aydın, Oktay; Altunkaya, Canan; Şahiner, İbrahim Tayfun; Özden, Hüseyin; Uzun, HafizeObjective: Anastomosis on ischemic intestines is a problematicissue in daily surgical routine. In this study, we investigated thepotential effects of thymoquinone, zeolite and platelet rich plasma.Material and Methods: Fifty rats were divided into five groups.In the sham group all rats underwent colonic anastomosis withoutany ischemic insult. Colonic anastomosis was performed aftermesenteric ischemia was induced by clamping the superiormesenteric artery in other study groups. In the control group, nomedication was given to the rats after ishemic anastomosis. InZeolite group and thymoquinone group, Zeolite and thymoquinonewere applied locally on the anastomosis. In the platelet richplasma group, platelet rich plasma was applied locally on theanastomosis. All the rats were sacrified on the 10th day. Blood andtissue samples were retrieved.Results: Hydroxyproline levels were not different between thegroups. Bursting pressure was higher in the thymoquinone groupthan the control group. Reepithelization was higher than thezeolite group in the sham and thymoquinone groups. TNF-? andIL 1? levels were significantly higher in the sham group than allthe other groups. TNF-? and IL 1? levels were also significantlyhigher in the thymoquinone, zeolite and platelet rich plasmagroups than the control group and higher in the thymoquinonegroup than the zeolite and platelet rich plasma groups.Inflammation and ischemic necrosis levels were not differentbetween the groups.Conclusion: Our data is suggesting that thymoquinone andplatelet rich plasma have positive effects on ischemic anastomosishealing, while thymoquinone has the best results.Öğe Platelet-Rich Plasma May Offer a New Hope in Suppressed Wound Healing When Compared to Mesenchymal Stem Cells(Mdpi, 2018) Aydin, Oktay; Karaca, Gokhan; Pehlivanli, Faruk; Altunkaya, Canan; Uzun, Hafize; Ozden, Huseyin; Guler, OsmanBackground: The present study investigated the effectiveness of platelet-rich plasma (PRP) and mesenchymal stem cells (MSCs) in wound healing suppressed by corticosteroid in rats. Methods: Forty rats were separated into four groups. To disrupt the wound-healing processes, intraperitoneal single dose 10 mg/kg methylprednisolone was administered to all rats with the exception of Sham-S group. Then, full-thickness incision was performed to the abdominal skin of all animals, and PRP or MSCs were applied to the incision line except the Sham-S and Sham-M group animals. Ten days later, all animals were sacrificed to investigate: tissue collagenization, inflammation, and re-epithelialization grades histopathologically; and tissue hydroxyproline (HP), interleukin-1 beta (IL-1 beta), tumor necrosis factor-alpha levels biochemically. Results: Collagenization (p = 0.003) and inflammation grade (p = 0.002) values were higher in PR group. Tissue HP level value was found to be high in MC group (p < 0.001). Tissue IL-1 beta level value of Sham-M group was lower than those of other groups (p < 0.001). Conclusions: This preliminary study revealed that PRP could improve the histopathological grades in wound healing which was suppressed by corticosteroid in rats, while MSCs could show their therapeutic effects via biochemical route. These positive effects were more salient in PR group.
