Yazar "Duymus, Mehmet Esat" seçeneğine göre listele

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    Effect of Topical Application and/or Systemic Use of Red Ginseng Extract on Wound Healing in Rats With Experimentally Induced Diabetes
    (Hmp, 2022) Duymus, Mehmet Esat; Aydin, Hulya Ayik; Bulgurcu, Abdullah; Bayramoglu, Zeynep; Durhan, Abdullah; Salih, Salih; Pekcici, Mevlut Recep
    BACKGROUND: Red ginseng (Rg) is an herbal product that has been used in traditional medicine in Asian and European countries for many years. PURPOSE: To study the effects of Rg extract on wound healing when used systemically, locally, or in combination in rats with experimentally induced diabetes. METHODS: A total of 60 rats were randomly divided into 4 groups: saline (control), local Rg (LRg), systemic Rg (SRg), and local + systemic = combined Rg (CRg). A full-thickness wound (2 cm x 1 cm) was created on the back of the rats, and treatment protocols were carried out for 14 days. Wound areas of all rats were measured on days 0 and 14. Tissue samples were taken from the wound areas for histopathologic evalu-ation of inflammation, epithelialization, and fibrosis. Vascular endothelial growth factor (VEGF), CD4+, and CD8+ expressions were examined by immunohistochemistry. RESULTS: Wound contraction measurements were 63.8%, 80.5%, 88.5%, and 86.6% in the control, LRg, SRg and CRg groups, respectively.Although significant differences were observed for all treated groups (LRg, SRg, and CRg) compared with the control group in terms of wound contraction, there was no difference among the treatment groups. VEGF-positive vessel/mm2 was observed 4.00 +/- 0.75, 5.93 +/- 0.70, 5.93 +/- 1.93, and 7.93 +/- 0.70 in the control, LRg, SRg and CRg groups, respectively. There was no difference between LRg and SRg in terms of VEGF expression, but there was significant difference for all other groups compared with each other. CONCLUSION: All usage methods of Rg extract increased wound contraction, and differences were observed compared with the control group. However, the au-thors believe that the combined usage was more effective due to higher VEGF expression levels and lower CD4+:CD8+ ratio.
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    The effects of Capparis ovata seed oil on the healing of traumatic skin wounds
    (Turkish Assoc Trauma Emergency Surgery, 2022) Celepli, Salih; Colak, Bayram; Sezer, Umran Aydemir; Celepli, Pinar; Bigat, Irem; Duymus, Mehmet Esat; Korez, Muslu Kazim
    BACKGROUND: Capparis ovata contains alkaloids, lipids, polyphenols, flavonoids, and also is rich in antioxidants. Conventionally, in Turkey, the flower buds, root, bark, and fruits of C. ovata are used for their analgesic, anti-inflammatory, anti-rheumatism, tonic, and diuretic effects. The aim of this study was to examine the effect on wound healing of C. ovata seed oil (COSO), which is known to have antioxidant, anti-inflammatory, and antibacterial properties. METHODS: In the study, 20 Wistar albino female rats were randomly divided into two groups of 10 animals each. A standard full -thick-ness skin defect was created on the back area of the rats. In both groups, after cleaning the wounds with saline daily, no active substance other than saline was applied to the control group, while 1 cc/day COSO was applied to the wounds of the rats in the study group. On the post-operative 14th day, the rats were reanesthetized and wound area measurements were made. Then, excision was performed to include 1 cm of intact tissue around the wound, which remained unhealed, and samples were taken for histopathological examination. RESULTS: The changes in wound areas showed that after 14 days, the improvement in the group treated with caper oil (32.78; 95% confidence interval, 17.21-48.36) was significantly higher than that of the control group (65.41; 95% confidence interval, 49.84-80.98) (p=0.009). The histopathological scores showed a significant difference between the groups in respect of epithelial formation, inflam-mation, and fibrosis development. No epithelial tissue formation was observed in the control group (90%), and more incomplete re-epithelization and focal epidermal hyperplasia were observed in the treatment group (60%). Fibrosis development was mild and weak (70%) in the control group and was evaluated as severe and intense (60%) in the treatment group. Perivascular edema was mild (50%) and vascularity was immature (60% - an indicator of neovascularization) in the treatment group. These histopathological results showed that the treatment group inflammation phase was completed and the proliferation phase started, as well as the effectiveness of the use of caper oil on epithelization, angiogenesis, and fibrosis, which are important histopathological parameters in the evaluation of wound healing compared to the control group. CONCLUSION: From the results of this study, it was concluded that COSO significantly enhances the healing of full-thickness skin wounds and this effect is primarily related to its anti-inflammatory effect.
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    Prognostic value of Prognostic Nutritional Index (PNI) for 5-year recurrence-free survival in surgically resected gastrointestinal stromal tumors
    (Edizioni Luigi Pozzi, 2023) Duymus, Mehmet Esat; Ugur, Mustafa; Dal, Mehmet Burak; Aslan, Ersin Rasim; Donmez, Yasemin; Ozgur, Tumay; Secinti, Ilke Evrim
    BACKGROUND: Recent studies have investigated the role of neutrophil-to-lymphocyte ratio (NLR), platelet-to-lymphocyte ratio (PLR), systemic inflammation index (SII), and prognostic nutritional index (PNI) on prognosis for various malig-nancies. However, the value of these markers in determining the prognosis for gastrointestinal stromal tumors (GIST) remains controversial. We investigated the effect of NLR, PLR, SII, and PNI on 5-year recurrence-free survival (RFS) in patients with surgically resected GIST. MATERIALS AND METHODS: We retrospectively analyzed patients (n=47) who had undergone surgical resection for pri-mary, localized GIST at a single institution between 2010 and 2021. The patients were divided into two groups accord-ing to the recurrence status in the 5-year period as 5-year RFS(+) (patients with no recurrence (n=25) and 5-year RFS(-) (patients with recurrence (n=22) groups. RESULTS: In univariate analyses, Eastern Cooperative Oncology Group Performance Status (ECOG-PS), tumor localiza-tion, tumor size, PNI, and risk category were significantly different between the RFS(+) and RFS(-) groups while NLR, PLR, SII were not. Multivariate analyses revealed that only the tumor size (HR =5.485, 95% CI: 0.210-143.266, p=0.016), and PNI (HR= 112.020, 95% CI: 8.755-1433.278, p<0.001) were independent prognostic factors for RFS. The patients with a high PNI (>= 46.25) had a higher 5-year RFS rate than the patients with low PNI (<46.25) (95.2% to 19.2%, p<0.001). CONCLUSION: A higher preoperative PNI is an independent positive predictor for 5-year RFS for patients with surgi-cally resected GIST. However, NLR, PLR, and SII have no significant effect.