Temel Tıp Bilimleri Bölümü Koleksiyonu
Bu koleksiyon için kalıcı URI
Güncel Gönderiler
Öğe Genetic investigation of the trail mechanism in diabetic and non-diabetic obese patients(Springer/Plenum Publishers, 2024) Sezgin, Saadet Büşra Aksoyer; Durak, Şermin; Çelik, Faruk; Gheybi, Arezoo; Dıramalı, Murat; Çakmak, Ramazan; Gürol, Ali OsmanObesity is an important healthcare issue caused by abnormally increased adipose tissue because of energy-intake overcoming energy expenditure. Disturbances in the physiological function of adipose tissue mediate the development of diabetes. It is a metabolic disease that results from decreased insulin-levels and/or changes in the insulin action mechanism. Tumor Necrosis Factor-Associated Apoptosis-Inducing Ligand(TRAIL), which is a member of the Tumor Necrosis Factor(TNF)-family with an important role in adipose tissue biology, is included in many studies with its ability to induce apoptosis in cancer cells, but the number of human-studies conducted on the gene related to its protective-role against diabetes and obesity at this level is insufficient. Our study was carried out as a case and control and included three groups (80 diabetic obese, 80 non-diabetic obese, and 80 healthy individuals as the control group). The Real-Time-PZR(RT-qPZR), and DNA Sanger-Sequencing Methods were used for gene expression and gene squences. As a result of the analyses, TRAIL gene expression level was found to be higher in the controls than in the diabetic-obese and non-diabetic-obese group. This change in TRAIL gene expression suggests that TRAIL maybe a protective factor against diabetes. The presence of rs781673405, rs143353036, rs1244378045, rs767450259, rs759369504, rs750556128, and rs369143448 mutations, which was determined with the Sequencing-Method, was shown for the first time in the present study. In addition, it is the first study in which human TRAIL gene-expression and sequencing were performed together. We believe that these data will make an important contribution to the literature.Öğe Comparative analysis of thiol-disulfide homeostasis dynamics between elective cesarean section and uncomplicated vaginal delivery: Insights into perinatal oxidative balance(Verduci Publisher, 2024) Çendek, Büşra Demir; Bayraktar, Bilge; Tonyalı, Nazan Vanlı; Çakır, Betül Tokgöz; Alışık, Murat; Koç, Sevgi; Erel, ÖzcanOBJECTIVE: Thiols are organic compounds containing sulfhydryl groups that exert antioxidant effects via dynamic thiol-disulfide homeostasis. The shift towards disulfide indicates the presence of an oxidative environment. Different modes of delivery can affect thiol-disulfide homeostasis. Accordingly, we planned this research to evaluate the effects of the mode of delivery on thiol-disulfide homeostasis in both maternal serum and fetal cord blood samples. PATIENTS AND METHODS: We conducted a prospective case -control study involving two groups: vaginal delivery (n=50) and elective cesarean section (CS) (n=45). The vaginal delivery group exclusively comprised uncomplicated term deliveries, while the CS group included pregnant individuals with scheduled cesarean deliveries due to the absence of spontaneous labor onset. Maternal serum and fetal cord blood samples were collected, and thiol-disulfide exchanges were analyzed using an automated method capable of measuring both aspects of the thiol-disulfide balance. RESULTS: The levels of native thiol (-SH) and total thiol in both maternal serum and fetal cord blood samples were significantly higher in the vaginal delivery group than those in the CS group. An important discovery of our study was that fetal cord disulfide (-SS) level, which may reflect oxidative stress, was higher in newborns born via vaginal delivery when examined alone. However, in both maternal and fetal cord blood, the combined ratios, SS/SH ratio (%), SS/ Total thiol ratio (%), and SH/Total thiol ratio (%) were observed to be similar between the groups in both maternal and fetal cord blood. It was observed that as the mother's weight gained during pregnancy increased, SS/SH and SS/total thiol increased (positive correlation), while SH/total thiol decreased (negative correlation). CONCLUSIONS: Our results showed that the dynamic thiol-disulfide homeostasis was greatly influenced by the way of delivery and supported the idea that vaginally-delivered infants may have more oxidative stress.Öğe Effects of modulation of certain TRP channels and voltage-gated potassium channel activities on calcitonin gene- related peptide release in isolated rat hemiskull preparations(Karger, 2021) Çıtak, Arzu; Kılınç, Erkan; Ankaralı, Seyit; Dağıstan, Yaşar; Yoldaş, HamitÖğe Evaluation of the dynamic thiol/disulfide homeostasis in patients with chronic venous insufficiency(Elsevier, 2024) Müdüroğlu, Ayhan; Velioğlu, Yusuf; Çelik, Hümeyra; Yüksel, Ahmet; Aldemir, Mustafa; Atasoy, Mustafa Selçuk; Kılıç, Ali ÖnderObjective: There is no study in the literature evaluating the dynamic thiol/disulfide homeostasis in patients with chronic venous insufficiency. Thus, we designed this study to evaluate the dynamic thiol/disulfide homeostasis as a novel indicator of oxidative stress in patients with chronic venous insufficiency.Methods: This was a prospective case-control study performed at the department of cardiovascular surgery of a tertiary referral hospital in Turkey. A total of 80 (CEAP C3-C6) patients with lower extremity chronic venous insufficiency (as the study group) and 80 healthy subjects (as the control group) were enrolled to the study. The participants' basic demographic and clinical characteristics as well as serum levels of some laboratory parameters including albumin, ferroxidase, myeloperoxidase, native thiol, total thiol, disulphide, native thiol/total thiol, disulphide/native thiol, and disulphide/total thiol were determined, and then compared between the groups. Results: In terms of basic demographic and clinical characteristics, both groups were statistically similar, and there were no significant differences between the groups. When the laboratory parameters were considered, serum ferroxidase and myeloperoxidase levels were detected to be significantly higher, whereas albumin, native thiol, total thiol, and disulphide levels were detected to be significantly lower in the study group than in the control group. Conclusions: Dynamic thiol/disulphide homeostasis could be considered as an indicator reflecting the oxidative stress status in patients with chronic venous insufficiency. (J Vasc Surg Venous Lymphat Disord 2024;12:101689.)Öğe Effect of Urtica Dioica on bacterial translocation in mechanic icter model(2006) Aydın, Metin; Özaydın, İsmet; İlçe, Zekeriya; Şahin, İdris; Şencan, İrfan; Sılan, Coşkun; Yaşar, MehmetSepsis and renal, hepatic and multi organ failure syndrome, due to bacterial translocation, if the operations were carried out for mechanic icter, still cause high morbidity and mortality.1 It is known that obstructions of the extra hepatic bile ducts increase the translocation of bacteria in the gastrointestinal system. It was reported that bacterial translocation causes sepsis and multiple organ failure syndrome.2 Urtica Dioica (UD) is a perennial plant with stinging hairs belonging to the plant family Urticaceae with a height of 30-100 cm. It is endemic in many parts of Turkey, and seeds have been widely used in folk medicine, particularly in advanced cancer patients, for a long time.3 In some studies, an anti proliferative effect in prostate cancer, an anti inflammatory effect in chronic inflammatory events such as rheumatoid arthritis, a mitogenic effect on the T lymphocytes, and an antidiuretic and hypotensive effect has been reported.4 It was also reported that UD prevents the toxic effect of carbon tetrachloride on the liver.3 The aim of the present study was to investigate the efficiency of UD on bacterial translocation in an experimental model.Öğe Ofloxacin induced Sweet's syndrome in a patient with Crohn's disease(2006) Özdemir, Davut; Korkmaz, Uğur; Şahin, İdris; Şencan, İrfan; Kavak, Ayşe; Küçükbayrak, Abdülkadir; Çakır, SelmaSweet's syndrome is an acute febrile neutrophilic dermatosis. This syndrome can be idiopathic, para-inflammatory, paraneoplastic, drug-induced, or pregnancy-related. In this paper, a case of Sweet's syndrome associated with ofloxacin therapy in a patient with Crohn's disease is reported. © 2005 The British Infection Society.Öğe Evidence for heterogeneity in response to treatment in mammary tumors of dogs as happens in humans(Springer Science and Business Media B.V., 2023) Turna, Özge; Üvez, Ayça; Baykal, Aslıhan; Develi, Elif Sedef ; Dıramalı, Murat; Sönmez, Kıvılcım; Karakaş, DidemTumors are formed by various clones developed over a long time. This gives rise to a heterogeneous nature. This heterogeneity is the hardest challenge in the treatment of cancers because it is the main reason for drug resistance. This is a well-known fact in human cancer. Therefore, we have reasoned that if the tumor heterogeneity in canine mammary gland tumors (CMGTs) could be shown by an ex vivo assay, which will be used first time in veterinary oncology practice, this could be used further in clinics. To achieve this, twenty-six patients were included in the study. Tumor tissues were obtained from animals during routine surgery. Tumor cells were isolated and seeded ex vivo. The cells were exposed to anticancer drugs that are clinically used. Seven days after the treatment, chemosensitivity has luminometrically been assayed by ATP-tumor chemosensitivity assay (ATP-TCA). It has clearly been shown that all the tumor tissues have responded to treatment differently, implying that heterogeneity exists in mammary tumors. There has also been found that there was a weak to moderate statistically significant correlation between tumor size and drug index. However, there has been no correlation between drug index and metastasis to lymph nodes. Hyperplasic areas had relatively higher PCNA values. The results of our study demonstrate the heterogeneity in responses to in vitro drugs. Clinical trials based on test results and follow-up studies with large numbers of animals are needed to prove that such chemotherapeutic activity assessment tests can be clinically useful in predicting drug responses in CMGTs. © 2022, The Author(s), under exclusive licence to Springer Nature B.V.Öğe Efficacy of aprotinin treatment on bilateral blunt chest trauma created in rab(2013) Kaya, Halil; Kafalı, Mehmet Ertuğrul; Aydın, Kemal; Koçak, Sedat; Şahin, Mustafa; Gül, Mehmet; Cander, BaşarObjectives: To investigate the effects of aprotinin, on blood gasses, oxidant-antioxidant status, and lung histopathology in an experimental bilateral blunt chest trauma model. Methods: Conducted at the Experimental Animal Laboratory of Meram Medical School at Selcuk University, Konya, Turkey, the study comprised 21 New Zealand female albino rabbits who were divided into three groups. Trauma was applied on the sham and aprotinin groups, which was administered intravenous Aprotinin 20.000 U/kg. Arterial blood samples were obtained from all rabbits at hours 0, 3, 24, and 96. At hour 96 after trauma, all rabbits were sacrificed using the decapitation method, and then blood and lung tissue samples were obtained. Blood nitric oxide, malondialdehyde and blood gas measurements were made. Histopathological changes in the lung were examined with a light microscope. Results: While no positive effect of aprotinin was observed on nitric oxide malondialdehyde and partial pressure of carbon dioxide values, it was seen to have an increasing effect on partial oxygen pressure level. Aprotinin had a partial effect on lung histopathology. Conclusion: Aprotinin was determined to have a positive effect on PO2 levels. We could not find any positive effects especially on alveolar haemorrhage.Öğe Electrophysiologic and anti-inflammatorial effects of cyclooxygenase inhibition in epileptiform activity(Wiley, 2023) Türel, Canan Akünal; Çelik, Hümeyra; Çetinkaya, Ayhan; Türel, İdrisThe aim of our study is to investigate the electrophysiological and anti-inflammatory effects of diclofenac potassium on epileptiform activity, which is the liquid form of diclofenac, and frequently used clinically for inflammatory process by inhibiting cyclooxygenase enzyme (COX). Wistar rats aged 2-4 months were divided into Epilepsy, Diazepam, Diclofenac potassium, and Diazepam+diclofenac potassium groups. Diazepam and diclofenac potassium were administered intraperitoneally 30 min after the epileptiform activity was created with penicillin injected intracortically under anesthesia. After the electrophysiological recording was taken in the cortex for 125 min, interleukin-1 beta (IL-1 beta), interleukin-6 (IL-6), and tumor necrosis factor-alpha (TNF-alpha) were evaluated by the ELISA in the serums. No change was observed between the groups in serum IL-1 beta, IL-6, and TNF-alpha values. It was observed that the co-administration of diclofenac potassium and diazepam at 51-55, 56-60, 61-65, 111-115, and 116-120 min was more effective in reducing spike amplitude than diclofenac potassium alone (p < 0.05). Single-dose diclofenac potassium did not have an anti-inflammatory effect in epileptiform activity but both diazepam and diclofenac potassium reduced the epileptiform activity.Öğe The effect of protocatechuic acid on ovarian histopathology and reserve in rat ovarian torsion model(AEPRESS SRO, 2023) Erimşah, Sevilay; Çetinkaya, AyhanOBJECTIVES: The aim of the study is to investigate the effects of Protocatechuic Acid (PCA), which is an antioxidant, anti-inflammatory and anti-apoptotic agent, on ovarian tissue and ovarian reserve against ischemia-reperfusion (IR) injury in a rat ovarian torsion model.BACKGROUND: Reactive oxygen radicals cause histopathological changes in the ovarian tissue during the reperfusion phase. PCA may have protective effects on ovarian tissue and reserve due to its antioxidant and antiapoptotic properties.METHODS: A total of 24 Wistar adult female rats were divided into 3 groups as the control (sham operation, n = 8), IR (Ischemia-Reperfusion, n = 8), and IR+PCA (Ischemia-Reperfusion + 80 mg/kg protocatechuic acid, n = 8). The IR and IR + PCA groups underwent 3 hours of ischemia followed by 3 hours of ovarian reperfusion. Protocatechuic acid (80 mg/kg) was administered to the IR+PCA group 30 minutes before reperfusion. After reperfusion, the ovaries were removed for histopathological and biochemical examination.RESULTS: Histopathological score and TUNEL+ cell count were significantly lower and AMH expression level was significantly higher in the IR+PCA group when compared to the IR group (p <0.05). However, in the comparison of the follicle counts, there was no statistically signifi cant difference between all groups. Due to the increase in antioxidant activity, the MDA levels were found to be significantly lower in the IR+PCA group compared to the IR group (p < 0.05).CONCLUSION: Protocatechuic acid may be an effective antioxidant in protecting ovarian tissue and follicle reserve against IR injury of the ovary (Tab. 1, Fig. 4, Ref. 36). T ext in PDF www.elis.skÖğe Unilateral absence of the latissimus dorsi: A report of a rare case(Springernature, 2023) Erdem, Hüseyin; Çevik, Yiğit; Şafak, Nazire Kılıç; Açıkgöz, Ahmet Kürşad; Şenol, Gamze TaşkınThe latissimus dorsi is the largest muscle in the human body, located in the lower posterior thorax, and it contributes to motion in the upper extremity and provides assistance in respiration. This case report describes a rare occurrence of a unilateral absence of the latissimus dorsi accompanied by contralateral scoliosis in a 73-year-old female cadaver. The absence of the muscle along with the absence of the thoracodorsal nerve and branches of the subscapular and axillary arteries was identified during a standard dissection course. The implications of this rare case extend to an array of surgical interventions, including head, neck, breast, and torso reconstructive applications. It is important to investigate potential anomalies of the latissimus dorsi, while planning or performing free flap transfers. The report also highlights the importance of understanding this variation for educational and research purposes.Öğe Bioreactor recombinant production of SARS-CoV-2 virus antigens in cho cell clones by using new ucoe lentiviral vector system(Elsevier Science Ltd, 2023) Anakök, Ömer Faruk; Köse, PınarBackground & Aim: The new UCOE models we have recently developed, tested on many cell groups (including mouse ES and human iPS cells) and human mAb recombinant production studies as well, shows a powerful resistance to DNA methylation- mediated silencing and provides a higher and stable transfection profile. By the urgent need of vaccine development for COVID-19 during the pandemic, in this study we aimed to produce a potential recombinant vaccine by using the new generation UCOEs models of our own designÖğe Evaluation of the effect of COVID-19 on static balance in healthy young individuals(Bayrakol Medical Publisher, 2023) Şenol, Gamze Taşkın; Kürtül, İbrahim; Ray, Abdullah; Ahmetoğlu, GülçinAim: It is known that COVID-19 infection has various physiological effects. And, it also has negative effects on the balance. This study focused on evaluating the static balance of healthy individuals who either had or did not have a history of COVID-19.Material and Methods: The study included 30 individuals who were previously diagnosed with COVID-19 infection (positive PCR test), who recovered later on, and 30 individuals as a control group. After the dominant foot of both groups was determined, the flamingo balance test was used to evaluate static balance, and Dizziness Handicap Inventory (DHI) was applied to the group that had a COVID-19 infection history.Results: A significant difference was found between dominant foot balance and non-dominant foot balance in individuals who had COVID-19 and in the control group.Discussion: The severity of recent cases of COVID-19 disease that affect the balance system has risen significantly. This study showed that individuals with COVID-19 have problems with static balance compared to those without COVID-19. In our estimation, post-recovery rehabilitation programs for people who have had COVID-19 should include balancing exercises.Öğe Protective and therapeutic effects of okra seed in acute nontraumatic brain injury(Taylor & Francis Ltd, 2023) Yoldaş, Meyri Arzu; Bekdaş, Mervan; Danış, Ayşegül; Çetinkaya, Ayhan; Düzcü, Selma Erdoğan; Alışık, Murat; Kocabey, Hüseyin; Türel, İdrisAimThe purpose of this study was to examine the protective and therapeutic effects of okra (Abelmoschus esculentus [AE]) seed extract, with its known antioxidant, immunomodulatory, and anti-inflammatory properties, in an acetaminophen (paracetamol, N-acetyl- para-aminophenol)-induced model of hepatotoxicity and subsequent acute non-traumatic brain damage.Material and MethodForty male Wistar rats were randomly divided into five equal groups, control, paracetamol (P), okra seed extract (AE), okra seed extract + paracetamol (P + AE), and okra seed extract + paracetamol + N-acetyl cysteine (NAC) (P + AE + N). AE was administered by oral gavage through a gastric tube at 600 mg/kg/day for seven days. On the eighth day of the procedure, a single 1 g/kg dose of paracetamol and 300 mg/kg NAC were injected via the intraperitoneal route 1.5 h after AE administration. Rat tissue specimens were subsequently subjected to biochemical and histopathological analyses. Levels of markers such as S100 calcium-binding protein B (S100B), neuron-specific enolase (NSE), and matrix membrane metalloproteinase-9 (MMP-9) were investigated from rat serum specimens. Malondialdehyde (MDA) and superoxide dismutase (SOD) were also measured to determine oxidant-antioxidant status.ResultsS100B, NSE, MMP-9, MDA levels, and SOD enzyme activities were examined using biochemical methods. MDA levels were significantly lower in the P + AE group and MMP-9 levels in the AE, P + AE, and P + AE + N groups compared to the P group. Histopathological examination results supported the biochemical findingsConclusionOkra seed extract exhibits a protective and therapeutic effect against non-traumatic brain damage resulting from acute paracetamol intoxication. We think that this benefit of AE derives from its antioxidant property.Öğe Sex determination by the machine learning algorithms through using morphometric measurements of the carpal, metacarpal, and phalangeal bones(Sociedad Chilena de Anatomía, 2023) Şenol, Gamze Taşkın; Kürtül, İbrahim; Ray, Abdullah; Ahmetoğlu, GülçinIn the study, it was aimed to predict sex from hand measurements using machine learning algorithms (MLA). Measurements were made on MR images of 60 men and 60 women. Determined parameters; hand length (HL), palm length (PL), hand width (HW), wrist width (EBG), metacarpal I length (MIL), metacarpal I width (MIW), metacarpal II length (MIIL), metacarpal II width (MIIW), metacarpal III length (MIIL), metacarpal III width (MIIIW), metacarpal IV length (MIVL), metacarpal IV width (MIVW), metacarpal V length (MVL), metacarpal V width (MVW), phalanx I length (PILL), measured as phalanx II length (PIIL), phalanx III length (PIIL), phalanx IV length (PIVL), phalanx V length (PVL). In addition, the hand index (HI) was calculated. Logistic Regression (LR), Random Forest (RF), Linear Discriminant Analysis (LDA), K-nearest neighbour (KNN) and Naive Bayes (NB) were used as MLAs. In the study, the KNN algorithm's Accuracy, SEN, F1 and Specificity ratios were determined as 88 %. In this study using MLA, it is understood that the highest accuracy belongs to the KNN algorithm. Except for the hand's MIIW, MIIIW, MIVW, MVW, HI variables, other variables were statistically significant in terms of sex difference.Öğe Fibrinogen-A? THR312ALA polymorphism is associated to chronic thromboembolic pulmonary hypertension in Turkey(Kare Publ., 2023) Çörtük, Mustafa; Yıldızeli, Bedrettin; Kurar, Ercan; Kayış, Seyit AliBackground: Chronic thromboembolic pulmonary hypertension is a condition that occurs after mechanical obstruction of the pulmonary arteries by thrombus. Since the frequency and demographics of chronic thromboembolic pulmonary hypertension differ between countries, it is thought that genetic factors may play a role in its development. The aim of this study is to reveal the status of VKORC1, CYP2C9*3, CYP2C9*7, and fibrinogen-A alpha THR312ALA gene polymorphisms in chronic thromboembolic pulmonary hypertension patients in Turkey.Methods: In this prospective cross-sectional study, a total of 46 chronic thromboembolic pulmonary hypertension patients and 106 healthy volunteers were included. Polymerase chain reaction-restriction fragment length polymorphism method was used to determine candidate gene polymorphisms for chronic thromboembolic pulmonary hypertension. The general population parameters of each locus were calculated, and the relationship between dominant, co-dominant, and recessive genotype models and chronic thrombo-embolic pulmonary hypertension was analyzed.Results: For the fibrinogen-A alpha gene, those with the THR/THR genotype were found to have a 13.51 (95% CI: 2.688-33.333) times less susceptibility rate to the disease than those with the ALA/ THR genotype, the susceptibility of THR/ALA genotype to the disease was 5.026 (95% CI: 1.774-14.242) times more than those with ALA/ALA genotype. There was no difference between patient groups for VKORC1, CYP2C9*3 genes (P > .05). Since the CYP2C9*7 patient group was monomorphic for the ILE allele, the patient/control odds ratio and 95% CI could not be calculated.Conclusion: This study shows that there is an association between the fibrinogen-A alpha gene ALA polymorphism at the amino acid position of 312 and the development of chronic thromboembolic pulmonary hypertension, but not between the CYP2C9 and VKORC1 gene polymorphisms.Öğe Mitochondrial metabolism related markers GDF-15, FGF-21, and HIF-1a are elevated in pediatric migraine attacks(Wiley, 2023) Kılınç, Yasemin Baranoğlu; Kılınç, Erkan; Danış, Aysegül; Hancı, Fatma; Türay, Sevim; Özge, AynurObjective: The purpose of this study was to investigate the serum levels of mitochon-drial metabolism/reactive oxygen species (ROS)- related peptides (hypoxia induc-ible factor- 1a [HIF- 1a], fibroblast growth factor -21 [FGF- 21], growth differentiation factor -15 [GDF- 15]) and key migraine- related neuropeptides (calcitonin gene- related peptide [CGRP], pituitary adenylate cyclase- activating peptide -38 [PACAP- 38], sub-stance P [SP], and vasoactive intestinal peptide [VIP]) during migraine attacks and to evaluate their diagnostic value in pediatric migraine.Background: There is increasing evidence for the important role of impairment in oxidative mitochondrial metabolism in the pathophysiology of migraine. Potential biomarkers that may reflect the relationship between migraine and mitochondrial dysfunction are unclear.Methods: A total of 68 female pediatric migraine patients without aura and 20 fe -male healthy controls aged 8- 18 years, admitted to the hospital, were enrolled in this cross- sectional study. Serum concentrations of these molecules were determined by enzyme- linked immunosorbent assays, and clinical features and their possible diag-nostic value were analyzed.Results: Serum levels of HIF- 1a (252.4 +/- 51.9 [mean +/- standard deviation]) pg/mL), GDF- 15 (233.7 +/- 24.7 pg/mL), FGF- 21 (96.1 +/- 13.1 pg/mL), CGRP (44.5 +/- 11.3), and PACAP- 38 (504.7 +/- 128.9) were significantly higher in migraine patients compared to healthy controls (199.8 +/- 26.8, 192.8 +/- 20.7, 79.3 +/- 4.1, 34.1 +/- 3.5 and 361.2 +/- 86.3 pg/ mL, respectively). The serum levels of these peptides were also higher in patients with chronic migraine than in patients with episodic migraine, and higher in the ictal period than in the interictal period. A positive correlation was found between attack frequency and both HIF- 1a and FGF- 21 levels in migraine patients. Serum levels of VIP and SP were not different between the migraine patients and healthy controls.Conclusion: Migraine attacks are accompanied by elevated HIF- 1a, FGF- 21, GDF- 15, CGRP, and PACAP- 38 in medication -naive pediatric patients with migraine. Elevated circulating mitochondrial metabolism/ROS-related peptides suggest a mitochondrial stress in pediatric migraine attacks and may have potential diagnostic value in monitoring disease progression and treatment response in children. Novel approaches intervening with mitochondrial metabolism need to be investigated.Öğe The role of oxidative stress in chemotherapy-induced gonadotoxicity in a rat model, and the protective effects of Nigella Sativa oil on oxidative stress, the anti-Mullerian hormone level, and apoptosis(Verduci Publisher, 2023) Çetinkaya, K.; Atasever, Melahat; Erişgin, Züleyha; Sönmez, Çiğdem; Alışık, Murat; Özer, ÇiğdemOBJECTIVE: This study aimed to determine the role of oxidative stress (OS) in carboplatin-induced gonadotoxicity and whether Nigella Sativa oil (NSO), an herbal antioxidant, has a protective effect on ovarian apoptosis, OS, and the anti-Mullerian hormone (AMH) level in a rat model. MATERIALS AND METHODS: The study included 24 adult female rats that were divided into 4 treatment groups. Group A saline + saline (sham group); group B: NSO + saline; group C: saline + carboplatin; group D: NSO + carboplatin. Saline, NSO, and carboplatin were administered intraperitoneally 24 and/or 48 h before sacrification as 4 mL/kg, 4 mL/kg, and 80 mg/kg, respectively. Apoptosis, OS parameters, and AMH were measured. RESULTS: Oxidant levels and apoptosis were higher, whereas AMH and the antioxidants were lower in group C than in group A. Apoptosis, OS parameters, and AMH levels were negatively affected by chemotherapy (CTx) in group C whilst improvement in those parameters was observed in group D following NSO pretreatment. The levels of apoptosis and malondialdehyde (MDA), an OS parameter, in group D were lower than in group C as they declined from 34.3% to 8.65% (p = 0.002) and from 199.4 nmol/g tissue to 136.4 nmol/g tissue (p = 0.002), respectively. However, the slight increase in AMH level from 2.7 ng/mL to 3.5 ng/mL due to the NSO effect was not significant between groups C and D. CONCLUSIONS: The present findings show that carboplatin has adverse effects on AMH, ovarian tissue apoptosis, and OS parameters. NSO pretreatment might protect ovarian tissue and decrease CTx-induced ovarian injury by decreasing OS and apoptosis, but the protective effect of NSO on AMH is limited.Öğe A cross-cultural adaptation and validation of the Turkish version of American Orthopaedic Foot and Ankle Society Metatarsophalangeal-Interphalangeal Scale (AOFAS-MTP-IP) for the hallux(Turkish Joint Diseases Foundation, 2023) Kalaycıoğlu, Oya; Ayanoğlu, Tacettin; Yılmaz, Ömer Faruk; Turhan, Mahmut TimurObjectives: In this study, we aimed to translate and culturally adapt the American Orthopaedic Foot and Ankle Society (AOFAS) Hallux Metatarsophalangeal (MTP)-Interphalangeal (IP) scale, which is used for the clinical assessment of patients with hallux valgus (HV), into Turkish and to evaluate its validity and reliability. Patients and methods: Between February 2022 and October 2022, a total of 67 patients (18 males, 49 females; mean age: 51.5 & PLUSMN;15.9 years; range, 18 to 68 years) with HV deformity and able to communicate in Turkish were included. Following the translation of the AOFAS hallux MTP-IP scale into Turkish, its cultural appropriateness was confirmed. Intra-rater and inter-rater reliabilities were assessed by intraclass correlation coefficients (ICCs), using data collected by two orthopedists. Agreement among test-retest evaluations was conducted using the Bland-Altman analysis. The construct validity of the scale was determined by the Manchester-Oxford Foot Questionnaire (MOXFQ) and Short Form Health Survey (SF-36). Content validity was confirmed by the floor/ceiling effects. Results: The Turkish AOFAS hallux MTP-IP had an excellent intra-rater reliability of 0.971. The intra-rater reliability of the pain, function, and alignment subscales ranged from 0.904 to 0.978. The inter-rater reliability was 0.913 for the total score, while ranging from 0.838 to 0.918 for the subscales. The total score of the AOFAS hallux MTP-IP had a high correlation with the physical domains of the MOXFQ and SF-36, while weaker correlations with mental domains were observed. No floor/ceiling effect was observed for the overall Turkish AOFAS hallux MTP-IP. Conclusion: The Turkish translated and culturally adapted AOFAS hallux MTP-IP scale is a valid and reliable measure, ensuring its use in assessing the clinical status of Turkish patients with HV deformity.Öğe Active shrinkage protects neurons following axonal transection(Cell Press, 2023) Aydın, Mehmet Şerif; Bay, Sadık; Yiğit, Esra Nur; Özgül, Cemil; Oğuz, Elif Kaval; Him, AydınTrauma, vascular events, or neurodegenerative processes can lead to axonal injury and eventual transec(axotomy). Neurons can survive axotomy, yet the underlying mechanisms are not fully understood. Excessive water entry into injured neurons poses a particular risk due to swelling and subsequent death. Using in vitro and in vivo neurotrauma model systems based on laser transection and surgical nerve cut, demonstrated that axotomy triggers actomyosin contraction coupled with calpain activity. As a consequence, neurons shrink acutely to force water out through aquaporin channels preventing swelling and bursting. Inhibiting shrinkage increased the probability of neuronal cell death by about 3-fold. These studies reveal a previously unrecognized cytoprotective response mechanism to neurotrauma and offer fresh perspective on pathophysiological processes in the nervous system.
