Browsing by Author "Celik, Hakim"

Now showing 1 - 9 of 9

Determination of Serum Differential Carnitine Ester Levels in Hiv(+)patients: a Cross-Sectional Study
(Bentham Science Publ Ltd, 2023) Binici, Irfan; Akbay, Halil Ibrahim; Huyut, Zubeyir; Alp, Hamit Hakan; Karsen, Hasan; Koyuncu, Ismail; Celik, Hakim
Objective It has been reported that carnitine deficiency is observed in various viral infections and in the follow-up of the prognosis of some diseases. In this cross-sectional study, we aimed to determine how carnitine ester derivatives change in HIV-positive patients. Materials and Methods In this study, 25 HIV-infected patients who applied to Harran University Faculty of Medicine Education Research and Practice Hospital Infectious Diseases and Clinical Microbiology Outpatient Clinic and who did not receive any antiretroviral treatment, as well as 25 healthy volunteers were included in the study. Carnitine ester levels in serum samples were measured by Liquid Chromatography-Mass Spectrometry/Mass Spectrometry (LC-MS/MS) method (Shimadzu North America, Columbia, MD, USA). Results While suberoylcarnitine (C8DC), myristoleylcarnitine (C14:1), tetradecadienoylcarnitine (C14:2), palmitoleylcarnitine (C16:1), and linoleylcarnitine (C18:2) levels in HIV(+) patients were quite low compared to the control group, tiglylcarnitine (C5:1) levels were high (p <= 0.05). In addition, C5:1 and C14:2 index parameters according to VIP score, and C5:1 and C14:1/C16 index parameters according to ROC analysis were determined as markers with high potential to distinguish HIV(+) patients from healthy volunteers. Conclusion This study showed that levels of acylcarnitine derivatives might be altered in HIV(+) patients, and the results obtained may contribute to a better understanding of carnitine metabolism.
The Effect on Serum Myeloperoxidase Activity and Oxidative Status of Eradication Treatment in Patients Helicobacter Pylori Infected
(Pergamon-elsevier Science Ltd, 2011) Nazligul, Yasar; Aslan, Mehmet; Horoz, Mehmet; Celik, Yilmaz; Dulger, Ahmet Cumhur; Celik, Hakim; Erel, Ozcan
Objectives: Myeloperoxidase activity has been investigated after eradication of Helicobacter pylon (H. pylori) in infected patients in previous studies but the results are controversial. The aim of this study was to investigate effect on serum myeloperoxidase activity and oxidative status of eradication treatment in H. pylon-infected patients. Design and methods: Gastric biopsy specimens were obtained from 30 H. pylori infected patients. Serum Myeloperoxidase activity was measured by enzyme-linked immunoassay. Oxidative status was determined using total antioxidant capacity (TAC) and total oxidant status (TOS) measurement and calculation of oxidative stress index (OSI). Results: After 2 weeks of the eradication treatment, serum myeloperoxidase activity, TOS and OSI values were significantly lower (all: p<0.001), while TAC was significantly higher (p<0.001). Conclusions: Our results indicate that eradication treatment in H. pylori-infected patients may affect both oxidative stress and myeloperoxidase activity which is an important biomarker in pathogenesis of atherosclerosis. (C) 2011 The Canadian Society of Clinical Chemists. Published by Elsevier Inc. All rights reserved.
Evaluation of Oxidative Status in Patients With Hyperthyroidism
(Humana Press inc, 2011) Aslan, Mehmet; Cosar, Niyet; Celik, Hakim; Aksoy, Nurten; Dulger, Ahmet Cumhur; Begenik, Huseyin; Selek, Sahbettin
Data on the antioxidant levels enzyme in patients with hyperthyroidism are limited and conflicting. Therefore, the objective of this study was to evaluate the oxidative status using an automated method in patients with hyperthyroidism. Thirty-six subjects with hyperthyroidism and 30 healthy controls were enrolled in this study. Serum oxidative status was determined via measurement of total antioxidant capacity (TAC) and total oxidant status (TOS) and calculation of oxidative stress index (OSI). Serum TAC levels were significantly lower in patients with hyperthyroidism than controls (P = 0.002), while serum TOS levels and OSI values were significantly higher (P = 0.008, 0.004; respectively). Serum TAC levels were correlated with TSH levels (rho = 0.223, P = 0.032), FT3 levels (rho = -0.434, P = 0.002) and FT4 levels (rho = -0.363, P = 0.003) in patients. Further, TOS levels and OSI values were correlated with TSH levels (rho = -0.245, P = 0.037; rho = -0.312, P = 0.011, respectively), FT3 levels (rho = 0.293, P = 0.017, rho = 0.505, P = 0.002, respectively), and FT4 levels (rho = 0.302, P = 0.006, rho = 0.321, P = 0.008, respectively) in patients. Duration of disease was significantly correlated with OSI values in patients (rho = 0.420, P = 0.011), while no correlation with serum TAC levels and TOS levels (P > 0.05). Oxidants are increased and antioxidants are decreased in patients with hyperthyroidism; as a result, the oxidative-antioxidative balance is shifted to the oxidative side. Increased oxidative stress may play a role in the pathogenesis of hyperthyroidism. It is believed that supplementation of antioxidant vitamins such as vitamins C and E may be helpful for these patients.
Mean Platelet Volume and Platelet Distributed Width Levels in Abo Blood Groups
(Wiley-blackwell, 2016) Celik, Hakim; Aslan, Mehmet; Kirmit, Adnan; Altiparmak, Ibrahim Halil; Kara, Erdal; Karakilcik, Ali Ziya
Peripheral Lymphocyte Dna Damage and Oxidative Status in Football Players After a Three-Day Football Tournament
(Japan Soc internal Medicine, 2013) Atli, Mustafa; Aslan, Mehmet; Kucukoglu, Mehmet Emin; Temur, Haci Bayram; Taskin, Abdullah; Celik, Hakim
Objective Regular physical activity is well known to play a cardioprotective role. The objective of this study was to investigate peripheral lymphocyte DNA damage and oxidative status in adult football players a three-day football tournament. Methods Twenty-five adult male football players and 25 sedentary male subjects were enrolled in the present study. Plasma total antioxidant status (TAS), total oxidant status (TOS) and the oxidative stress index (OSI) were determined. Peripheral lymphocyte DNA damage was determined using an alkaline comet assay. Results Plasma TOS, OSI and peripheral lymphocyte DNA damage were significantly lower in the adult football players than in the sedentary subjects (all: p<0.001), while TAS was significantly higher in the football players (p<0.001). The plasma TAS levels were inversely correlated with TOS, OSI and peripheral lymphocyte DNA damage (r =-0.683, p<0.001; r =-0.909, p<0.001; r =-0.608, p<0.001; respectively) in the adult football players. Conclusion These results indicate that physical activity is associated with increased antioxidant capacity and decreased oxidative stress. Such conditions are important for a healthy life. Further studies are needed to clarify the mechanisms underlying this association.
Peripheral Mononuclear Leukocyte Dna Damage, Plasma Prolidase Activity, and Oxidative Status in Patients With Benign Prostatic Hyperplasia
(Taylor & Francis Ltd, 2015) Gecit, Ilhan; Meral, Ismail; Aslan, Mehmet; Kocyigit, Abdurrahim; Celik, Hakim; Taskin, Abdullah; Ceylan, Kadir
Objectives: Prolidase plays a major role in collagen turnover, matrix remodeling, and cell growth. Benign prostatic hyperplasia (BPH) may be associated with an increased extracellular matrix deposition. Therefore, the present study was designed to investigate the plasma prolidase activity, oxidative status, and peripheral mononuclear leukocyte DNA damage in patients with BPH. Patients and methods: Twenty-six male patients with BPH and 24 healthy male subjects were included in this study. Blood samples were collected from antecubital vein after an overnight fasting period, and the plasma was separated. Plasma prolidase activity, total antioxidant capacity (TAC), total oxidant status (TOS), and oxidative stress index (OSI) were determined. The peripheral lymphocyte oxidative DNA damage was determined using an alkaline single cell gel electrophoresis assay (comet assay). Results: The plasma prolidase activity, TOS levels, OSI values, and peripheral mononuclear leukocyte DNA damage were significantly higher (P < 0.001), while the TAC levels were significantly lower (P < 0.001) in patients with BPH than controls. In BPH patients, the prolidase activity was significantly associated with TAC levels (r = -0.366, P < 0.05), TOS levels (r = 0.573, P < 0.001), and OSI (r = 0.618, P < 0.001) and peripheral mononuclear leukocyte DNA damage (r = 0.461, P < 0.001). Conclusions: Our results showed that BPH might be associated with an increased oxidative stress, and also an increased plasma prolidase activity. Increased prolidase activity might play an important role in the etiopathogenesis and/or progression of BPH.
Plasma Free Amino Acid Profile in Hiv-Positive Cases
(Bentham Science Publ Ltd, 2022) Binici, Irfan; Alp, Hamit Hakan; Karsen, Hasan; Koyuncu, Ismail; Gonel, Ataman; Celik, Hakim
Background: Increasing the sensitivity and availability of liquid chromatography tandem mass spectrometry (LC-MS/MS) devices may provide advantages in terms of revealing the changes in metabolic pathways in HIV-positive patients and elucidating the physiopathology. Introduction: The aim of this study was to determine the difference in amino acid levels between HIV-positive patients and healthy individuals by using LC-MS / MS and investigate its relationship with HIV infection. Material and Methods: Concentrations of 36 different amino acids and their derivatives were measured and compared in venous plasma samples from 24 HIV-positive patients and 24 healthy individuals by using the LC-MS/MS method (Shimadzu North America, Columbia, MD, USA). Results: HIV-positive subjects had significantly lower alanine, 1-methyl-L-histidine, valine, aspartate, cysteine, cystine, methionine, lysine, glutamine, imino acid, tyrosine, tryptophan, threonine, sarcosine, and argininosuccinic acid and significantly higher 3-methyl-L -histidine, asparagine, glutamate, and carnosine levels as compared to healthy controls. No significant differences were detected in other amino acids. Conclusion: The significant differences in amino acid profile between HIV-positive and healthy subjects may represent an auxiliary biomarker of cellular damage in asymptomatic HIV-positive patients that may be examined in more detail in further studies. It may also provide guidance for symptomatic cases in terms of the association between symptoms, clinical manifestations, and deficiency or excess of certain amino acids in the context of the complete metabolomics record of HIV-positive patients.
The Relationship Between Platelet Indices and Abo Blood Groups in Healthy Adults
(Wiley, 2019) Celik, Hakim; Duzenli, Ufuk; Aslan, Mehmet; Altiparmak, Ibrahim Halil; Kirmit, Adnan; Kara, Erdal; Karakilcik, Ali Ziya
Background ABO blood groups have been suggested to have a high correlation with cardiovascular diseases (CVDs). It has also been postulated that platelet indices, including mean platelet volume (MPV) and platelet distribution width (PDW), are very important in the development and progression of CVDs. However, despite these common associations with CVDs, as far as we know, there are no studies investigating platelet indices in ABO blood groups. Thus, the aim of this study was to investigate whether platelet indices are associated with ABO blood groups. Methods The study included 301 healthy volunteers (99 women and 202 men; mean age: 32.59 +/- 7.52 years) whose blood groups were determined by the gel column method using agglutination techniques. Platelet indices were studied by an automated blood counter. Results No considerable differences in age, gender, or Rh factors were observed among ABO blood groups. MPV was detected to be considerably lower in O and A blood group subjects than in AB and B blood group subjects. Similarly, PDW was significantly lower in O and A blood group subjects than in B blood group subjects. Additionally, MPV in the O blood group subjects was significantly lower than in the non-O blood group subjects. Conclusions Because MPV and PDW are used as markers of CVDs, individuals with O and A blood groups in this study may be considered to have a lower risk of CVDs than AB and B blood group subjects. However, prospective cohort studies involving a greater number of volunteers are needed to elucidate these relationships.
Serum Paraoxonase and Arylesterase Activities and Oxidant Status in Patients With Brucellosis
(Academic Journals, 2011) Karsen, Hasan; Karahocagil, Mustafa Kasim; Akdeniz, Hayrettin; Ceylan, Mehmet Resat; Binici, Irfan; Selek, Sahbettin; Celik, Hakim
The aim of this study was to the investigate the effect of brucellosis infection on paraoxonase-1 (PON1) activity and oxidative status in patients with brucellosis. Sixty patients with brucellosis (47 acute, 13 subacute) and the 67 healthy controls were used in the study. Serum PON1 and arylesterase activities, total antioxidant capacity (TAC), total oxidant status (TOS), oxidative stress index (OSI), total free sulfhydryl (-SH), and lipid hydroperoxide (LOOH) groups were determined. In addition, HDL-cholesterol (HDL-C), LDL-cholesterol (LDL-C), total cholesterol (TC) and triglyceride (TG) were measured. Serum PON1 and arylesterase activities, total -SH group levels and TAC were significantly lower in brucellosis patients than controls (P<0.001). TOS, OSI and LOOH levels were significantly higher in brucellosis patients than controls (P<0.001). There were no significant differences between of serum LDL-C, TG and TC levels of patients subjects compared to controls (P > 0.05). Patients with brucellosis are exposed to potent oxidative stress and they have decreased PON1 activity. These predisposal factors might play a role in the pathogenesis for atherosclerosis in patients with brucellosis.