Yazar "Demir, Serif" seçeneğine göre listele
Listeleniyor 1 - 7 / 7
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Assessment of serum glucagon-like peptide-1 and dipeptidyl peptidase-4 levels in patients with migraine(Springer Heidelberg, 2025) Gultekin, Melis; Davran, Fatih; Yuksel, Nehir; Beyazcicek, Ozge; Demir, SerifBackground Migraine is a prevalent neurovascular disorder affecting over one billion people globally, imposing significant daily life limitations. Migraine headaches are linked to the activation of trigeminal nerve endings. Glucagon-like peptide-1 (GLP-1) is a hormone involved in insulin regulation and plays neuroprotective roles in the central nervous system (CNS). Dipeptidyl peptidase-4 (DPP-4) is a protease enzyme that degrades GLP-1, rendering it inactive, and modulates metabolic and neurological pathways. This study investigates the association between serum GLP-1 and DPP-4 levels and migraine pathophysiology to propose a novel therapeutic approach for migraine. Methods The study included 42 migraine patients and 42 healthy controls. After fasting for at least 8 h, blood samples were collected. Serum GLP-1 and DPP-4 levels were measured using ELISA, and statistical analyses were conducted with SPSS 24.0. Results Serum GLP-1 and DPP-4 levels were significantly lower in migraine patients compared to controls (p < 0.001). Patients with migraine with aura had significantly lower GLP-1 levels compared to those with migraine without aura (p = 0.016). A significant decrease in GLP-1 levels was observed in patients experiencing pain localized in the occipital lobe (p = 0.01). Conclusions Serum GLP-1 and DPP-4 levels were lower in migraine patients. Given the role of GLP-1 in the central nervous system, reduced GLP-1 may contribute to migraine pain. Similarly, low DPP-4, which metabolizes GLP-1, may be linked to these findings and could trigger attacks by increasing blood CGRP levels.Öğe E-sigaralar: Yeni Bir Fenomen(Düzce Üniversitesi, 2020) Beyazçiçek, Özge; Beyazçiçek, Ersin; Özmerdivenli, Recep; Demir, SerifElektronik sigaralar, geliştirildiğinden beri, tüm dünyada her geçen gün artan bir pazara sahiptir. Günümüzde e-sigara, tütün kullanımı insidansını azaltabilecek yeni bir “tütün” endüstrisini temsil etmektedir. Elektronik nikotin verme sistemi olarak da bilinen elektronik sigaralar minimal bir araçla aerosol haline getirilmiş nikotini vermek üzere tasarlanan cihazlardır. Elektronik sigaraların asıl amacı kullanıcıya sigara içiyor hissini tütün kullanmadan vermektir. E-sigara üreticileri elektronik sigaraları, sigarayı azaltmanın ya da tamamıyla bırakmanın bir yolu olarak pazarlamakla birlikte pek çok kullanıcı, özellikle gençler, e-sigarayı tütün sigarasından daha güvenli olduklarını düşündükleri için tercih etmektedirler. Birçok e-sigara markası marketlerde satılmakta ve bunlara her gün yeni bir tanesi eklenmektedir. Ek olarak, e-sigaralar için birçok farklı tatlandırıcı madde içeren ve birbirinden farklı aromalara sahip çeşitli e-likitler vardır. Bu e-likitlerin ana içerikleri; nikotin, propilen glikol ve bitkisel gliserindir. Çeşitli e-likit içerikleri nedeniyle, e-sigaranın inhalasyondan sonra insan sağlığı üzerindeki etkisi hala belirsizdir. Bu derlemede, e-sigaranın tarihi, çalışma mekanizması, gelişimi ve pazarlaması, bölümleri ve özellikleri, içerdiği maddeler, nikotin ve nikotinin farmakokinetiği, ülkelerin getirdiği düzenlemeler hakkında genel bilgiler ele alınmıştır.Öğe The Effect of Acute And Chronic Harmaline Administration On Penicillin Induced Epileptiform Activity In Rats(Wiley, 2023) Ozkan, Kayhan; Demir, Serif[No abstract available]Öğe Evaluation of the Protective Effect of the Cup Therapy on the Epileptic Seizure in Rats(Duzce Univ, Fac Medicine, 2021) Cetinkaya, Ayhan; Karamaden, Esra Fidan; Goksu, Selim; Bozat, Bihter Gokce; Demir, SerifObjective: Cup therapy has an important place in traditional and complementary medicine applications. The purpose of our study, this is the first time to investigate the protective effect of cup therapy in rats on experimentally generated epileptic seizures in new rat modeling created by different anatomic regions. Methods: A total of 42 Wistar albino rats were randomly divided into 6 groups (n:7). The new dry cup was applied to the G1 group, and the new wet cup model was applied to the G2. In the G3 group, an epilepsy model (PTZ, 35 mg / kg) was created and diazepam (2.5 mg / kg) was given to G4. Dry cup and wet cup models were applied to the G5 and G6 groups, respectively. 24 hours after the cupping therapies, the rats were injected with PTZ and the epilepsy behavior scores of the rats in all groups were recorded for 20-30 minutes. Results: In the 'Open Area' and 'Elevated Plus Maze' tests, there was no behavioral difference between the cup therapy group and the control group (p > 0.05). Given all the parameters, the G4 group significantly reduces the seizure compared to other groups (p < 0.05). There is a significant difference in G2, G5 and G6 groups compared to G3 in the phases parameter (p < 0.05). Conclusions: In this study, the new wet cup therapy (G2), which was applied for the first time, had a protective effect on seizures. G2, G5 and G6 groups are observed to suppress seizures compared to G3. Our findings are expected to contribute greatly to animal model analysis in the future.Öğe Investigation of Physiological Role of Mitochondrial KATP Channel’s on Penicillin G Induced Experimental Epilepsy Model in Rats(E-Journal of New World Sciences Academy, 2021) Soytürk, Hayriye; Demir, Serif; Bozdoğan, ÖmerEpilepsy is one of the neurological diseases that is commonly seen in the world. It is characterized by excessive activation of neurons that can not be controlled by the central nervous system. ATP dependent potassium (KATP) channel modulation is related with the epilepsy. This study is intended to research the physiological role of mitochondrial KATP channels in epilepsy in electrophysiological perspective. And bepridil has been used for this purpose. Wistar albino rats have been used. Animals have been divided into three main groups; Control, bepridil applied groups in pre-seizure, and during seizure. As a result, bepridil once applied prior to seizure in 0.1 and 1mg/kg doses increased the latency period of the seizure. Bepridil showed anticonvulsant effect at doses of 0.1 and 1 mg/kg before and during seizure groups. Closure of sarcoplasmic channels and opening of mitochondrial channels may be important to decrease the convultion occurred during epilepy.Öğe Protective Effect of Cup Therapy Model in Rats on Epileptic Seizures by Determination of Different Anatomic Region(Wiley, 2019) Cetinkaya, Ayhan; Fidan, Esra; Goksu, Selim; Bozat, Bihter Gokce; Demir, Serif[Abstract Not Available]Öğe Protective Mechanisms of EGCG in Mitigating Oxidative Stress and Liver Toxicity From Cigarette Smoke-Induced Damage(Wiley, 2025) Agan, Kagan; Demir, Serif; Ozmerdivenli, Recep; Agan, Aydan Fulden; Akin, Ali Tugrul; Alpay, Merve; Beyazcicek, OzgeExposure to cigarette smoke leads to an increase in oxidative stress within the body, resulting in both an elevated oxidant burden and a compromised antioxidant defense system. This imbalance creates a significant risk factor for various diseases by promoting cellular damage, inflammation, and toxicity. The oxidants present in cigarette smoke are considered the primary contributors to these pathological conditions. Supporting the antioxidant system with specific bioactive compounds may help mitigate the toxic effects caused by cigarette smoke. In this study, the effects of EGCG pre-administration on the antioxidant system were evaluated under both acute and chronic exposure conditions to cigarette smoke. Different doses of EGCG were administered to determine its potential role in oxidative stress regulation, and histopathological examinations and antioxidant enzyme levels were assessed. The findings demonstrated that while acute EGCG administration did not significantly improve antioxidant enzyme activity, chronic administration of EGCG at a dose of 50 mg/kg effectively increased antioxidant enzyme production, reduced oxidative stress, and liver injury. In the presence of cigarette smoke, EGCG contributed to the stabilization of oxidative stress markers. However, chronic EGCG administration in the absence of oxidative stressors requires further investigation to assess its impact on other organs. EGCG appears to be a promising candidate for alleviating the adverse effects of external oxidant exposure and mitigating oxidative stress. However, its long-term application and potential side effects in different physiological conditions should be explored further examinations. Although acute EGCG application did not enhance antioxidant enzyme levels, it unexpectedly elevated oxidative stress, emphasizing the need for more comprehensive studies to clarify its mechanisms and optimize its usage. We further identify the principal underlying mechanisms involved in this process.
