Temel Tıp Bilimleri Bölümü

Permanent URI for this communityhttps://hdl.handle.net/20.500.12514/3080

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Citation - WoS: 3
Citation - Scopus: 3
Comparison of growth factor levels in injectable platelet-rich fibrin obtained from healthy individuals and patients with chronic periodontitis: a pilot study
(Bmc, 2024) Karci, Bilge; Savaş, Hasan Basri; Savas, Hasan Basri; Department of Basic Medical Sciences / Temel Tıp Bilimleri Bölümü
Background This study aimed to assess and compare the concentrations of growth factors, white blood cells (WBCs), and platelets in injectable platelet-rich fibrin (i-PRF) derived from people with healthy periodontal conditions and those with chronic periodontitis.Methods Venous blood samples were obtained from 30 patients diagnosed with chronic periodontitis (test group) and 30 participants with healthy periodontal conditions (control group). The i-PRF was then acquired from centrifuged blood. The growth factors (VEGF, IGF-1, TGF-beta 1, PDGF-BB and EGF) released from the i-PRF samples were compared between groups with ELISA testing. The amounts of WBCs and platelets were also compared.Results No significant differences in the concentrations of growth factors were found between the groups (the mean values for the control and test groups were, respectively: IGF: 38.82, 42.46; PDGF: 414.25, 466.28; VEGF: 375.69, 412.18; TGF-beta 1: 21.50, 26.21; EGF: 138.62, 154.82). The test group exhibited a significantly higher WBC count than the control group (8.80 vs. 6.60, respectively). However, the platelet count did not show a statistically significant difference between the groups (control group 242.0 vs. test group 262.50). No significant correlation was observed between WBC count and growth factor level in either group.Conclusions The growth factor levels in i-PRFs did not exhibit significant difference between the two groups. This suggests that the levels of these growth factors may be unaffected by the periodontal disease.
Citation - WoS: 1
Citation - Scopus: 1
The distribution and the antimicrobial susceptibility features of microorganisms isolated from the burn wounds; a ten-year retrospective analysis
(Oxford University Press, 2023) Dicle, Yalçın; Dicle, Yalçın; Bayram, Yasemin; Parlak, Mehmet; Akış, Feride; Çallı, İskan; Department of Basic Medical Sciences / Temel Tıp Bilimleri Bölümü
In this study we aimed to evaluate the distribution features and antimicrobial susceptibility test results of the microorganisms isolated from the wounds of pediatric and adult burn patients. The culture and susceptibility test results of the microorganisms isolated from the wound swabs of the patients hospitalised in a tertiary burn care center in 10-years period, were retrospectively screened on the microbiology department databases. Their distribution of isolated microorganisms regarding species and susceptibility test results were compared with previous studies. A total of 367 microorganisms isolated from the burn wounds of 293 patients (13± 18.9 years, F/M: 0.93) (73 adult and 220 pediatric patients), were included in this study. A solitary agent was isolated in 239 (81.6%) patients, while two were isolated in 43 (14.7%) and three or more agents in 11 (3.8%). From these, 33% of the isolated microorganisms were gram positive cocci, 61% were gram negative bacteria and 6% were Candida spp. The most common isolated microorganisms were Staphylococcus aureus (18.5%), Pseudomonas spp. (16.9) and Escherichia coli (%11.2), while the least common was Streptococcus spp. (2.5%). Methicillin resistance was 15% among the S. aureus strains. No resistance was observed against levofloxacin, vancomycin, teicoplanin, linezolid, daptomycin, fusidic acid and tigecycline in S. aureus strains. The highest resistance rates were observed against levofloxacin (64%), tobramycin (64%), pip/tazobactam (63%), imipenem (63%), and the lowest against colistin (5%) and ceftazidime (29%), among Pseudomonas spp. The most common causative agents in burn wound infections and their current antimicrobial susceptibility features should be well identified, in order for prevention of serious complications and optimal management the condition to occur.
Citation - WoS: 1
Citation - Scopus: 1
Effects of acute carbon monoxide posioning on liver damage and comparisons of related oxygen therapies in a rat model
(Taylor & Francis Ltd, 2024) Gökdemir, Gül Şahika; Gokdemir, Gul Sahika; Seker, Ugur; Şeker, Uğur; Demirtas, Berjan; Taskin, Seyhan; Department of Basic Medical Sciences / Temel Tıp Bilimleri Bölümü
Acute carbon monoxide (CO) poisoning may cause liver damage and liver dysfunction. Therefore, in this study, we aimed to compare the efficiency of normobaric oxygen (NBO) and high-flow nasal cannula oxygen (HFNCO) treatments on liver injury. For that purpose, 28 male Wistar albino rats were divided into four groups (Control, CO, CO + NBO, and CO + HFNCO). The control group was allowed to breath room air for 30 min. Acute CO poisoning in CO, CO + NBO, CO + HFNCO was induced by CO exposure for 30 min. Thereafter, NBO group received 100% NBO with reservoir mask for 30 min. HFNCO group received high-flow oxygen through nasal cannula for 30 min. At the end of the experiment, all animals were sacrificed by cardiac puncture under anesthesia. Serum liver function tests were measured. Liver tissue total antioxidant status (TAS), total oxidant status (TOS), and oxidative stress index (OSI) levels, tissue histomorphology and immunoexpression levels of Bax, Caspase 3, TNF-alpha, IL-1 beta, and NF-kappa B were also examined. Our observations indicated that acute CO poisoning caused significant increases in blood COHb, serum aminotransferase (AST), alanine aminotransferase (ALT0, alkaline phosphatase (ALP), total protein, albumin, and globulin levels but a decrease in albumin to globulin ratio (all, p < 0.05). Furthermore, acute CO poisoning significantly increased the OSI value, and the immunoexpresssion of Bax, Caspase 3, TNF-alpha, IL-1 beta, and NF-kappa B in liver tissue (all, p < 0.05). These pathological changes in serum and liver tissue were alleviated through both of the treatment methods. In conclusion, both the NBO and HFNCO treatments were beneficial to alleviate the acute CO poisoning associated with liver injury and dysfunction. [GRAPHICS] .
Citation - WoS: 1
Citation - Scopus: 1
Prognostic significance of the chemerin level in coronavirus disease 2019 patients
(Lippincott Williams & Wilkins, 2024) Gökdemir, Gül Şahika; Gokdemir, Guel Sahika; Gokdemir, Mehmet Tahir; Gökdemir, Mehmet Tahir; Arac, Songul; Yokus, Beran; Department of Internal Medical Sciences / Dahili Tıp Bilimleri Bölümü; Department of Basic Medical Sciences / Temel Tıp Bilimleri Bölümü
Increased serum chemerin levels have been reported in several inflammatory diseases. Few studies have investigated the relationship between chemerin and clinical features of COVID-19. Thus, chemerin may modulate the development and progression of COVID-19. We compared the serum chemerin concentration between patients with and without SARS-CoV-2 infection and its association with the severity and prognosis of COVID-19 pneumonia. This is a prospective, single-center, cross-sectional study. We enrolled COVID-19 patients who presented to our tertiary hospital and healthy controls. The COVID-19 patients were conducted and the dates of symptom onset were recorded. After admission to the hospital and stabilization, blood samples were obtained for routine hemogram, biochemistry, and chemerin. The chemerin level was 37.93 +/- 17.3 ng/mL in patients followed in the ICU, 29.41 +/- 12.79 ng/mL in inpatients, 30.48 +/- 10.86 ng/mL in outpatients, and 25.12 +/- 9.82 ng/mL in healthy controls. The difference between patients treated in the ICU and healthy controls was significant (P < .001). The high-sensitivity C-reactive protein (hs-CRP), ferritin, procalcitonin (PCT), and D-dimer levels were significantly higher in the intensive care unit (ICU) group (P < .001). Moreover, the chemerin level of patients who died was significantly higher than that of those who survived (P < .001). The chemerin level was increased in COVID-19 patients and also increased with increasing disease severity. The chemerin level was higher in the COVID-19 patients than healthy controls and was significantly higher in patients who died compared to those who did not.
Citation - WoS: 3
Citation - Scopus: 3
The nephroprotective effect of Quercetin in Cyclophosphamide-induced renal toxicity might be associated with MAPK/ERK and NF-κB signal modulation activity
(Taylor & Francis Ltd, 2024) Seker, Ugur; Şeker, Uğur; Kavak, Deniz Evrim; Dokumaci, Fatma Zehra; Kizildag, Sefa; Irtegun-Kandemir, Sevgi; Department of Basic Medical Sciences / Temel Tıp Bilimleri Bölümü
The present study aimed to examine the protective effect of quercetin (QUE) on cyclophosphamide (CTX)-induced nephrotoxicity. For that purpose, 24 mice were divided into four groups (Control, QUE, CTX, and CTX + QUE). The CTX and CTX + QUE groups received 200 mg/kg of cyclophosphamide on the 1(st) and 7(th) days. The QUE and CTX + QUE groups were treated with 50 mg/kg of quercetin daily for 14 days. At the end of the experiment, the animals were sacrificed, and kidney samples were analyzed. The results indicated that CTX leads to severe morphological degenerations and disruption in renal function. Serum BUN, Creatinine, Uric acid, tissue Bax, Caspase 3, TNF-alpha and IL-1 beta expression levels were upregulated in the CTX group compared to Control and QUE groups (p < 0.05). Although MAPK/ERK phosphorylation level is not affected in CTX group, there was a significant increase in CTX + QUE group (p < 0.05), but the NF-kappa B was significantly suppressed in this group (p < 0.01). The RT-qPCR results showed that the cyt-c and the Bax/Bcl-2 ratio mRNA expression folds were upregulated in the CTX group (p < 0.01), which was downregulated in the CTX + QUE group. However, there was a significant difference in the CTX + QUE group compared to the Control and QUE groups (p < 0.01). The findings showed that administering quercetin along with cyclophosphamide alleviated renal injury by regulating apoptotic and inflammatory expression. Moreover, the administration of quercetin and cyclophosphamide could synergistically improve renal function test results, and activate cellular responses, which upmodulate MAPK/ERK phosphorylation and suppression of NF-kappa B.

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