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You N, Chen Y, Yan X, Gu B, Wang J, Zhang J. Persistent Helicobacter pylori infection leads to elevated fasting plasma glucose level: A retrospective cohort study based on a nondiabetes Chinese population. J Gastroenterol Hepatol 2023; 38:1942-1948. [PMID: 37403267 DOI: 10.1111/jgh.16275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 05/30/2023] [Accepted: 06/15/2023] [Indexed: 07/06/2023]
Abstract
BACKGROUND AND AIM The relationship between Helicobacter pylori (H. pylori) and fast plasma glucose (FPG) on nondiabetes populations is still inconclusive. Nowadays, not only the high infection rate of H. pylori but also the high FPG level is threatening the Chinese people. METHODS A retrospective cohort study has been established to analyze the relationship between H. pylori infection and FPG level, 18 164 individuals performed healthy examination in Taizhou Hospital Health Examination Center from 2017 to 2022 were included, and hematological indicators, body parameters, and H. pylori detection by 13 C-urea breath test were collected from patients. The follow-up intervals were greater than 12 months. RESULTS H. pylori infection was regarded as an independent risk factor for elevated FPG after multivariate logistic regression. Additionally, the average interval time were 33.6 ± 13.3 months. Mean changed FPG values in the persistent infection group were higher than in the subgroup of persistent negative (P = 0.029) as well as eradication infection (P = 0.007). The aforementioned changes began to appear after 2 years of follow-up. Similarly, when compared with the subgroup of persistent infection, mean changed triglyceride/high density lipoprotein (TG/HDL) values were much lower in the subgroup of persistent negative (P = 0.008) and eradication infection (P = 0.018), but the differences appeared after 3 years of follow-up. CONCLUSIONS H. pylori infection is an independent risk factor for elevated FPG in non-diabetes mellitus (DM) individuals. Persistent H. pylori infection causes an increase in FPG level and TG/HDL, which may be a risk factor for diabetes mellitus.
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Affiliation(s)
- Ningning You
- Department of Gastroenterology, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, Zhejiang, China
| | - Yi Chen
- Department of Gastroenterology, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, Zhejiang, China
| | - Xiaodan Yan
- Department of Gastroenterology, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, Zhejiang, China
| | - Binbin Gu
- Department of Gastroenterology, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, Zhejiang, China
| | - Jun Wang
- Department of Gastroenterology, Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, Zhejiang, China
| | - Jinshun Zhang
- Health Management Center, Taizhou Hospital of Zhejiang Province, Wenzhou Medical University, Zhejiang, China
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YILMAZ T, TÜZÜN D, ŞAHİN M, KILINÇ M. THE RELATIONSHIP BETWEEN OXIDATIVE STRESS AND SERUM PROLIDASE ACTIVITY IN PATIENTS WITH DIABETIC NEPHROPATHY, RETINOPATHY AND NEUROPATHY. KAHRAMANMARAŞ SÜTÇÜ İMAM ÜNIVERSITESI TIP FAKÜLTESI DERGISI 2022. [DOI: 10.17517/ksutfd.1079948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Amaç: Diyabetin mikrovasküler komplikasyonlarında oksidatif stresin belirteçlerini incelemek, prolidazın oksidatif stres göstergeleriyle ilişkisini incelemek, prolidazın prediktif değer olarak kullanılabilirliliğini araştırmaktır.
Gereç ve Yöntemler: Çalışmaya 112 tip 2 Diyabetes Mellitusu (DM) olan hasta ve 44 sağlıklı kontrol birey alındı. Hastaların ayrıntılı anamnezleri alınıp fizik muayeneleri yapıldı. Açlık plazma glukozu (APG), hemoglobin A1c (HbA1C), kreatinin, spot idrarda mikrototal protein düzeyleri bakıldı. Göz dibi muayenesi ile diyabetik retinopati varlığı araştırıldı. Nöropati varlığı açısından nörolojik muayeneleri yapıldı. Ayrıca tüm hastaların sabah alınan kan örneğinde oksidatif stress için katalaz (CAT), superoksit dismutaz(SOD), glutatyon peroksidaz (GPx), malondialdehit (MDA), nitrik oksit(NO), serum prolidaz aktivitesi ölçümü yapıldı.
Bulgular: Tip 2 DM olan hastaların 80’inde (%71,42) komplikasyon mevcut iken 41’inde (%28,58) komplikasyon yoktu. Açlık plazma glukozu diyabetik komplikasyonu olan grupta diğer gruplara anlamlı olarak yüksekti (p
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Affiliation(s)
- Tuğba YILMAZ
- KAHRAMANMARAŞ SÜTÇÜ İMAM ÜNİVERSİTESİ, TIP FAKÜLTESİ
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Eni-Aganga I, Lanaghan ZM, Balasubramaniam M, Dash C, Pandhare J. PROLIDASE: A Review from Discovery to its Role in Health and Disease. Front Mol Biosci 2021; 8:723003. [PMID: 34532344 PMCID: PMC8438212 DOI: 10.3389/fmolb.2021.723003] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Accepted: 08/18/2021] [Indexed: 01/14/2023] Open
Abstract
Prolidase (peptidase D), encoded by the PEPD gene, is a ubiquitously expressed cytosolic metalloproteinase, the only enzyme capable of cleaving imidodipeptides containing C-terminal proline or hydroxyproline. Prolidase catalyzes the rate-limiting step during collagen recycling and is essential in protein metabolism, collagen turnover, and matrix remodeling. Prolidase, therefore plays a crucial role in several physiological processes such as wound healing, inflammation, angiogenesis, cell proliferation, and carcinogenesis. Accordingly, mutations leading to loss of prolidase catalytic activity result in prolidase deficiency a rare autosomal recessive metabolic disorder characterized by defective wound healing. In addition, alterations in prolidase enzyme activity have been documented in numerous pathological conditions, making prolidase a useful biochemical marker to measure disease severity. Furthermore, recent studies underscore the importance of a non-enzymatic role of prolidase in cell regulation and infectious disease. This review aims to provide comprehensive information on prolidase, from its discovery to its role in health and disease, while addressing the current knowledge gaps.
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Affiliation(s)
- Ireti Eni-Aganga
- Center for AIDS Health Disparities Research, Nashville, TN, United States.,School of Graduate Studies and Research, Nashville, TN, United States.,Department of Microbiology, Immunology and Physiology, Nashville, TN, United States
| | - Zeljka Miletic Lanaghan
- Center for AIDS Health Disparities Research, Nashville, TN, United States.,Pharmacology Graduate Program, Vanderbilt University, Nashville, TN, United States
| | - Muthukumar Balasubramaniam
- Center for AIDS Health Disparities Research, Nashville, TN, United States.,Department of Biochemistry, Cancer Biology, Pharmacology and Neuroscience, Meharry Medical College, Nashville, TN, United States
| | - Chandravanu Dash
- Center for AIDS Health Disparities Research, Nashville, TN, United States.,School of Graduate Studies and Research, Nashville, TN, United States.,Department of Biochemistry, Cancer Biology, Pharmacology and Neuroscience, Meharry Medical College, Nashville, TN, United States
| | - Jui Pandhare
- Center for AIDS Health Disparities Research, Nashville, TN, United States.,School of Graduate Studies and Research, Nashville, TN, United States.,Department of Microbiology, Immunology and Physiology, Nashville, TN, United States
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Abstract
An increasing number of studies have focussed on the neurobiology of schizophrenia (SCH), contributing to a better understanding of this disorder. Prolidase is a metalloprotease found in various tissues, which has been associated with the concentrations of proline, a neurotransmitter, in the brain. There is evidence to suggest that elevated proline levels play a role in SCH. The aim of the present study was to compare plasma proline levels in patients with drug-naive first-episode psychosis (FEP) and in those with SCH. Patients diagnosed with FEP (n = 26) and SCH (n = 26) were recruited for this study, in addition to healthy control volunteers (n = 26). Plasma prolidase levels were found to be elevated in the SCH group compared to drug-naive FEP and healthy control groups. This finding indicates that prolidase levels are higher in SCH patients, while levels in patients with drug-naive FEP are similar to those of healthy control. Follow-up studies are needed to provide a better understanding of prolidase in the etiopathogenesis of SCH.
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ERDOGDU UE, ÇAYCI H, TARDU A, ARSLAN U, ÜSTÜNDAĞ Y, EREL Ö, DEMİRCİ H, ÇANTAY H. Relationship between Helicobacter pylori and thiol-disulfide homeostasis: A prospective observational study. ARCHIVES OF CLINICAL AND EXPERIMENTAL MEDICINE 2020. [DOI: 10.25000/acem.635688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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6
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Albayrak L, Sogut O, Çakmak S, Gökdemir MT, Kaya H. Plasma oxidative-stress parameters and prolidase activity in patients with various causes of abdominal pain. Am J Emerg Med 2020; 38:99-104. [DOI: 10.1016/j.ajem.2019.04.032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Revised: 04/15/2019] [Accepted: 04/15/2019] [Indexed: 10/27/2022] Open
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7
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Dizdar OS, Turunç Özdemir A, Başpınar O, Koçer D, Katırcılar Y, Çelik İ. Serum prolidase level in patients with brucellosis and its possible relationship with pathogenesis of the disease: a prospective observational study. Turk J Med Sci 2019; 49:1479-1483. [PMID: 31651117 PMCID: PMC7018350 DOI: 10.3906/sag-1902-122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 08/04/2019] [Indexed: 11/25/2022] Open
Abstract
Background/aim Changes in collagen metabolism and fibroblastic activity may play a role in the pathogenesis of brucellosis. The prolidase enzyme plays an important role in collagen synthesis. We aimed to investigate the association of prolidase levels with brucellosis. Materials and methods Serum prolidase levels in 20 patients newly diagnosed with brucellosis were compared with levels in 30 healthy control subjects. Patients with brucellosis were reassessed 3 months later for prolidase, other laboratory measurements, and response to treatment. Results The levels of serum prolidase were significantly higher in brucellosis patients compared with those of healthy controls. Prolidase, sedimentation, and C-reactive protein levels were significantly lower after antibrucellosis treatment than before treatment. Conclusion The current study is the first to demonstrate significantly increased serum prolidase levels in patients with brucellosis compared with healthy controls. Prolidase levels also significantly decreased with antibrucellosis treatment. This finding provides a new experimental basis to understand the pathogenesis of brucellosis in relation to collagen metabolism. The increase in serum prolidase levels might be related to several factors such as tissue destruction, increased fibroblastic activity, and granuloma formation, all of which are involved in the natural history of brucellosis.
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Affiliation(s)
- Oğuzhan Sıtkı Dizdar
- Department of Internal Medicine and Clinical Nutrition, Kayseri City Training and Research Hospital, Kayseri, Turkey
| | - Ayşe Turunç Özdemir
- Department of Clinic Microbiology and Infectious Disease, Kayseri City Training and Research Hospital, Kayseri, Turkey
| | - Osman Başpınar
- Department of Internal Medicine, Kayseri City Training and Research Hospital, Kayseri, Turkey
| | - Derya Koçer
- Department of Biochemistry, Kayseri City Training and Research Hospital, Kayseri, Turkey
| | - Yavuz Katırcılar
- Department of Internal Medicine, Kayseri City Training and Research Hospital, Kayseri, Turkey
| | - İlhami Çelik
- Department of Clinic Microbiology and Infectious Disease, Kayseri City Training and Research Hospital, Kayseri, Turkey
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8
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Ceylan MF, Tural Hesapcioglu S, Kasak M, Senat A, Erel O. Increased prolidase activity and high blood monocyte counts in pediatric bipolar disorder. Psychiatry Res 2019; 271:360-364. [PMID: 30529319 DOI: 10.1016/j.psychres.2018.11.066] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 11/28/2018] [Accepted: 11/29/2018] [Indexed: 01/05/2023]
Abstract
Various psychological, genetic, and biochemical factors are thought to be involved in the aetiology of pediatric bipolar disorder (PBD). However, few studies have evaluated the biochemical basis of PBD. The level of peripheral blood mononuclear cells and serum prolidase activity were determined in PBD and matched healthy comparison subjects. Blood from 38 (age range: 14-17) PBD-type I and 37 age- and gender-matched healthy comparison subjects was analyzed for numbers of neutrophils, lymphocytes, monocytes, lymphocyte-to-monocyte ratio (LMR), neutrophil-to-lymphocyte ratio (NLR) and serum prolidase activity. The prolidase activity and monocyte count were significantly higher in PBD than the control group. There were no significant differences in numbers of neutrophils, lymphocytes, LMR and NLR between the patient and control groups. These results suggest that the immune system and prolidase activity may be activated in PBD. There is a clinical benefit from the early detection of PBD using serum prolidase activity levels and monocyte counts. Especially, prolidase activity may be a trait marker for diagnosing PBD. However, further studies are needed to verify these findings.
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Affiliation(s)
- Mehmet Fatih Ceylan
- Child and Adolescent Psychiatry Department, Ankara Yildirim Beyazit University Faculty of Medicine, Ankara, Turkey.
| | - Selma Tural Hesapcioglu
- Child and Adolescent Psychiatry Department, Ankara Yildirim Beyazit University Faculty of Medicine, Ankara, Turkey
| | - Meryem Kasak
- Child and Adolescent Psychiatry Department, Ankara Yildirim Beyazit University Faculty of Medicine, Ankara, Turkey
| | - Almila Senat
- Clinical Biochemistry Department, Ankara Yildirim Beyazit University Faculty of Medicine, Ankara, Turkey
| | - Ozcan Erel
- Clinical Biochemistry Department, Ankara Yildirim Beyazit University Faculty of Medicine, Ankara, Turkey
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9
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Zhang L, Zhou P, Meng Z, Pang C, Gong L, Zhang Q, Jia Q, Song K. Infectious mononucleosis and hepatic function. Exp Ther Med 2018; 15:2901-2909. [PMID: 29456696 PMCID: PMC5795407 DOI: 10.3892/etm.2018.5736] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Accepted: 11/09/2017] [Indexed: 12/28/2022] Open
Abstract
Abnormal hepatic function is common in infectious mononucleosis (IM). However, it remains unknown why increased transferase levels are more common than bilirubin abnormalities in IM. The current study aimed to investigate these associations in the Chinese population. A total of 95 patients with IM (47 males and 48 females) were enrolled in the current study, as well as 95 healthy controls. Patients were sorted by sex. A receiver operating characteristic (ROC) curve was used to determine cut-off values for IM diagnosis and prediction. Crude and adjusted odds ratios (OR) for IM were analyzed using binary logistic regression. It was determined that alanine aminotransferase (ALT), aspartate aminotransferase (AST) and γ-glutamyl transferase (GGT) levels were significantly higher in patients with IM compared with controls; however, total bilirubin (TB) levels were significantly lower in patients with IM. ROCs demonstrated that, if ALT, AST and GGT concentrations were higher than, or if TB was lower than, cut-off values, they were predictive of IM. Binary logistic regression identified that the risk of IM in patients exhibiting high levels of transferases was significantly increased, particularly in males. Crude ORs in ALT quartile 4 were 21.667 and 10.111 for males and females, respectively and adjusted ORs were 38.054 and 9.882, respectively. A significant IM risk of IM was evident in patients with low bilirubin levels and females appeared to be particularly susceptible. For example, crude ORs in quartile 1 were 8.229 and 8.257 for males and females, respectively and adjusted ORs were 8.883 and 10.048, respectively. Therefore, the current study identified a positive association between transferase levels and IM and a negative association between TB and IM. Therefore, the results of the current study indicate that high transferases are suggestive of IM, particularly in males, whereas low TB is suggestive for IM, particularly in females.
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Affiliation(s)
- Li Zhang
- Department of Infectious Diseases, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Pingping Zhou
- Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Zhaowei Meng
- Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Chongjie Pang
- Department of Infectious Diseases, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Lu Gong
- Department of Infectious Diseases, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Qing Zhang
- Department of Health Management, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Qiyu Jia
- Department of Health Management, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Kun Song
- Department of Health Management, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
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Zhang L, Zhou P, Meng Z, Gong L, Pang C, Li X, Jia Q, Tan J, Liu N, Hu T, Zhang Q, Jia Q, Song K. Low uric acid level increases the risk of infectious mononucleosis and this effect is more pronounced in women. Mol Clin Oncol 2017; 7:1039-1044. [PMID: 29285370 DOI: 10.3892/mco.2017.1433] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Accepted: 09/28/2017] [Indexed: 12/22/2022] Open
Abstract
Infectious mononucleosis (IM) due to Epstein-Barr virus infection is common. Uric acid (UA) is an important endogenous antioxidant. To the best of our knowledge, the association between UA and IM has not been comprehensively investigated to date. The aim of the present study was to investigate this association in Chinese patients. A total of 95 patients (47 men and 48 women) with IM were recruited, along with 95 healthy controls. Clinical data were classified by patient sex. Receiver operating characteristic (ROC) curve analysis was adopted to determine the cut-off values of UA for IM diagnosis and prediction. Crude and adjusted odds ratios (ORs) of UA for IM were analyzed by binary logistic regression. The UA levels were significantly lower in IM patients compared with those in controls. In addition, UA levels in men were significantly higher compared with those in women. The ROC curve demonstrated good diagnostic and predictive values of UA for IM in both sexes. The UA cut-off values were 326.00 and 243.50 µmol/l for diagnosing IM in men and women, respectively, with a diagnostic accuracy of 76.596 and 80.208%, respectively. Binary logistic regression analysis revealed a significant risk of IM in the low UA quartiles in both sexes. Following adjustments, the ORs even increased. Women with low UA levels appeared to be more susceptible to IM. For example, the crude ORs in quartile 1 were 24.000 and 52.500 for men and women, respectively, and the respective adjusted ORs were 31.437 and 301.746 (all P<0.01). To the best of our knowledge, the present study is the first to demonstrate the inverse association between UA and IM, suggesting a progressive decrease of antioxidant reserve in IM. Moreover, low UA was suggestive of IM, particularly in women.
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Affiliation(s)
- Li Zhang
- Department of Infectious Diseases, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Pingping Zhou
- Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Zhaowei Meng
- Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Lu Gong
- Department of Infectious Diseases, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Chongjie Pang
- Department of Infectious Diseases, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Xue Li
- Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Qiang Jia
- Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Jian Tan
- Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Na Liu
- Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Tianpeng Hu
- Department of Nuclear Medicine, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Qing Zhang
- Department of Health Management, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Qiyu Jia
- Department of Health Management, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
| | - Kun Song
- Department of Health Management, Tianjin Medical University General Hospital, Tianjin 300052, P.R. China
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Aslan M, Duzenli U, Esen R, Soyoral YU. Serum prolidase enzyme activity in obese subjects and its relationship with oxidative stress markers. Clin Chim Acta 2017; 473:186-190. [PMID: 28867357 DOI: 10.1016/j.cca.2017.08.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Revised: 08/24/2017] [Accepted: 08/31/2017] [Indexed: 11/26/2022]
Abstract
BACKGROUND The relationship between increased serum enzyme activity of prolidase and increased rate of collagen turnover in the arterial wall has been asserted in previous studies. Collagen reflects much of the strength to the connective tissue involved in the arterial wall. Atherosclerosis is very common vessel disease and oxidative stress plays a pivotal role in the etiopathogenesis. Our objective was to examine the serum enzyme activity of prolidase and its possible relationships with oxidative stress parameters in obese subjects. METHODS Our present study was conducted 27 obese subjects and 26 age-matched healthy control subjects. The serum enzyme activity of prolidase in all study population was evaluated spectrophotometrically. Oxidative stress levels in obese subjects were analyzed with total antioxidant capacity (TAC) and total oxidant status (TOS) as well as oxidative stress index (OSI). RESULTS Obese subjects have higher serum TOS and OSI indicators as well as prolidase activity than those in control subjects (for all; p<0.001). Moreover, obese subjects have lower levels of TAC than in those in healthy subjects (p<0.001). In the Pearson's correlation analysis, enzyme activity of prolidase was positively related with TOS (p<0.001, r=0.529) and OSI (p<0.001, r=0.519) as well as BMI (p<0.001, r=0.692) and inversely related with TAC (p<0.05, r=-0.405) in obese subjects. CONCLUSIONS Increased serum prolidase activity and decreased antioxidant levels are likely to be a results of increased of oxidative stress levels in obese subjects. The significantly correlation between increased oxidative stress and increased prolidase activity may play a pivotal role in etiopathogenesis of atherosclerotic cardiovascular diseases in obese subjects.
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Affiliation(s)
- Mehmet Aslan
- Yuzuncu Yil University, Medical Faculty, Department of Internal Medicine, Van, Turkey.
| | - Ufuk Duzenli
- Yuzuncu Yil University, Medical Faculty, Department of Otorhinolaryngology, Van, Turkey
| | - Ramazan Esen
- Yuzuncu Yil University, Medical Faculty, Department of Internal Medicine, Van, Turkey
| | - Yasemin Usul Soyoral
- Yuzuncu Yil University, Medical Faculty, Department of Internal Medicine, Van, Turkey
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Celik S, Kızıltan R, Yılmaz EM, Yılmaz Ö, Demir H. Potential diagnostic and prognostic significance of plasma prolidase activity in gastric cancer. Biomark Med 2017; 11:319-327. [DOI: 10.2217/bmm-2016-0367] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Aim: Plasma prolidase activities (PPAs) in cases of gastric cancer. Methodology/results: This study was based on a prospective design. 60 patients with gastric cancer (operable cases: 48; inoperable: 12) and 60 healthy controls were included in the study. Prolidase activity was analyzed. The mean PPA levels in the operable, inoperable and control groups were 45.60 ± 4.20, 54.35 ± 4. 9 and 10.92 ± 0.79 U/l, respectively (p < 0.001). PPA decreased significantly after tumor resection. PPA level was significant in differentiating operable cases from inoperable (sensitivity: 91.7%; specificity: 85.2%). Discussion/conclusion: PPA was significantly higher in patients with inoperable gastric cancer than in operable cases and the control group. A strong correlation was found between tumor volume and PPA.
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Affiliation(s)
- Sebahattin Celik
- Department of General Surgery, Faculty of Medicine, Yuzuncu Yıl University, Van, Turkey
| | - Remzi Kızıltan
- Department of General Surgery, Faculty of Medicine, Yuzuncu Yıl University, Van, Turkey
| | - Eyüp M Yılmaz
- Department of Surgery, Van Training & Education Hospital, Van, Turkey
| | - Özkan Yılmaz
- Department of General Surgery, Faculty of Medicine, Yuzuncu Yıl University, Van, Turkey
| | - Halit Demir
- Department of Chemistry, Faculty of Science & Art, Yuzuncu Yıl University, Van, Turkey
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Guven B, Turer C. Gingival crevicular fluid levels of prolidase and alkaline phosphatase in periodontitis. BALKAN JOURNAL OF DENTAL MEDICINE 2017. [DOI: 10.1515/bjdm-2017-0027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Background/Aim: The purpose of this study was to investigate gingival crevicular fluid (GCF) alkaline phosphatase (ALP) and prolidase levels in subjects with different periodontal status. Material and Methods: Fifteen periodontitis, fifteen gingivitis and fifteen healthy subject were included. GCF samples were collected from participants. Probing depth, clinical attachment level, gingival index was recorded. ALP and prolidase levels were determined in GCF by spectrophotometrically. Results: Higher values of ALP were found in periodontitis compared with gingivitis and healthy control (p<0.001). The values of prolidase were lower in periodontitis than healthy control (p<0.05). A statistically significant positive correlation was found between clinical parameters and ALP levels (p<0.001). There is no significant correlation between clinical parameters and prolidase levels (p>0.05). Additionally, no significant correlation was detected between ALP and prolidase (r= -0.309, p>0.05). Conclusion: Our preliminary data suggest that low prolidase level in periodontitis was not associated with ALP and clinical parameters, which represent periodontal destruction and inflammation.
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14
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Terzioglu D, Uslu L, Simsek G, Atukeren P, Erman H, Gelisgen R, Ayvaz S, Aksu B, Uzun H. The Effects of Hyperbaric Oxygen Treatment on Total Antioxidant Capacity and Prolidase Activity after Bile Duct Ligation in Rats. J INVEST SURG 2016; 30:376-382. [DOI: 10.1080/08941939.2016.1257666] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Duygu Terzioglu
- Department of Biochemistry, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Lebriz Uslu
- Department of Nuclear Medicine, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul Turkey
| | - Gonul Simsek
- Department of Physiology, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Pinar Atukeren
- Department of Biochemistry, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Hayriye Erman
- Department of Biochemistry, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Remise Gelisgen
- Department of Biochemistry, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Suleyman Ayvaz
- Department of Pediatric Surgery, Faculty of Medicine, Trakya University, Edirne, Turkey
| | - Burhan Aksu
- Department of Pediatric Surgery, Faculty of Medicine, Trakya University, Edirne, Turkey
| | - Hafize Uzun
- Department of Biochemistry, Cerrahpasa Faculty of Medicine, Istanbul University, Istanbul, Turkey
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15
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Rubio CP, Hernández-Ruiz J, Martinez-Subiela S, Tvarijonaviciute A, Ceron JJ. Spectrophotometric assays for total antioxidant capacity (TAC) in dog serum: an update. BMC Vet Res 2016; 12:166. [PMID: 27526688 PMCID: PMC4986369 DOI: 10.1186/s12917-016-0792-7] [Citation(s) in RCA: 160] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 08/03/2016] [Indexed: 12/20/2022] Open
Abstract
The aim of this review is to study the main spectrophotometric methods used to evaluate total antioxidant capacity (TAC) in serum samples of dogs. Total antioxidant capacity (TAC) is an analyte frequently used to assess the antioxidant status of biological samples and can evaluate the antioxidant response against the free radicals produced in a given disease. Trolox equivalent antioxidant capacity (TEAC), ferric reducing ability of plasma (FRAP), and cupric reducing antioxidant capacity (CUPRAC) are different assays described to determine TAC of a sample. This review explains the basis of each assay and their application in the determination of TAC in dogs, and also provides selected information about reports in humans for comparative purposes. It is concluded that, ideally, various different assays integrated in a panel should be used for TAC evaluation, since depending on the assay performed TAC results can be markedly different.
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Affiliation(s)
- Camila Peres Rubio
- Interdisciplinary Laboratory of Clinical Analysis Interlab-UMU, Faculty of Veterinary Medicine, Regional Campus of International Excellence 'Campus Mare Nostrum', University of Murcia, 30100, Espinardo, Murcia, Spain
| | - Josefa Hernández-Ruiz
- Department of Plant Biology (Plant Physiology), Faculty of Biology, University of Murcia, Murcia, Spain
| | - Silvia Martinez-Subiela
- Interdisciplinary Laboratory of Clinical Analysis Interlab-UMU, Faculty of Veterinary Medicine, Regional Campus of International Excellence 'Campus Mare Nostrum', University of Murcia, 30100, Espinardo, Murcia, Spain
| | - Asta Tvarijonaviciute
- Interdisciplinary Laboratory of Clinical Analysis Interlab-UMU, Faculty of Veterinary Medicine, Regional Campus of International Excellence 'Campus Mare Nostrum', University of Murcia, 30100, Espinardo, Murcia, Spain.,Department of Animal Medicine and Surgery, Veterinary School, University Autonoma of Barcelona, Barcelona, Spain
| | - José Joaquin Ceron
- Interdisciplinary Laboratory of Clinical Analysis Interlab-UMU, Faculty of Veterinary Medicine, Regional Campus of International Excellence 'Campus Mare Nostrum', University of Murcia, 30100, Espinardo, Murcia, Spain.
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16
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Demir S, Bulut M, Atli A, Kaplan İ, Kaya MC, Bez Y, Özdemir PG, Sır A. Decreased Prolidase Activity in Patients with Posttraumatic Stress Disorder. Psychiatry Investig 2016; 13:420-6. [PMID: 27482243 PMCID: PMC4965652 DOI: 10.4306/pi.2016.13.4.420] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 09/06/2015] [Accepted: 09/17/2015] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE Many neurochemical systems have been implicated in the development of Posttraumatic Stress Disorder (PTSD). The prolidase enzyme is a cytosolic exopeptidase that detaches proline or hydroxyproline from the carboxyl terminal position of dipeptides. Prolidase has important biological effects, and to date, its role in the etiology of PTSD has not been studied. In the present study, we aimed to evaluate prolidase activity in patients with PTSD. METHODS The study group consisted of patients who were diagnosed with PTSD after the earthquake that occurred in the province of Van in Turkey in 2011 (n=25); the first control group consisted of patients who experienced the earthquake but did not show PTSD symptoms (n=26) and the second control group consisted of patients who have never been exposed to a traumatic event (n=25). Prolidase activities in the patients and the control groups were determined by the ELISA method using commercial kits. RESULTS Prolidase activity in the patient group was significantly lower when compared to the control groups. Prolidase activity was also significantly lower in the traumatized healthy subjects compared to the other healthy group (p<0.01). CONCLUSION The findings of the present study suggest that the decrease in prolidase activity may have neuroprotective effects in patients with PTSD.
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Affiliation(s)
- Süleyman Demir
- Department of Psychiatry, Dicle University, Diyarbakir, Turkey
| | - Mahmut Bulut
- Department of Psychiatry, Dicle University, Diyarbakir, Turkey
| | - Abdullah Atli
- Department of Psychiatry, Dicle University, Diyarbakir, Turkey
| | - İbrahim Kaplan
- Department of Biochemistry, Dicle University, Diyarbakir, Turkey
| | | | - Yasin Bez
- Department of Psychiatry, Marmara University, Istanbul, Turkey
| | | | - Aytekin Sır
- Department of Psychiatry, Dicle University, Diyarbakir, Turkey
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17
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Kachuei A, Amini M, Sebghatollahi V, Feizi A, Hamedani P, Iraj B. Effect of Helicobacter pylori eradication on insulin resistance among prediabetic patients: A pilot study and single-blind randomized controlled clinical trial. JOURNAL OF RESEARCH IN MEDICAL SCIENCES : THE OFFICIAL JOURNAL OF ISFAHAN UNIVERSITY OF MEDICAL SCIENCES 2016; 21:8. [PMID: 27904554 PMCID: PMC5121998 DOI: 10.4103/1735-1995.177355] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/05/2015] [Revised: 11/24/2015] [Accepted: 02/03/2016] [Indexed: 02/06/2023]
Abstract
BACKGROUND Type II diabetes mellitus (T2DM) is the prevalent type of diabetes in the world. Prediabetic patients are the most probable group to get diabetes. Several studies have mentioned the role of inflammation in the incidence of diabetes. The origin of inflammation can be infection such as Helicobacter pylori (HP) infection. This study was designed to explore the effect of HP eradication on insulin resistance. MATERIALS AND METHODS This single-blind randomized controlled clinical trial was conducted in 2014-2015. The sample size consisted of 49 individuals who were in prediabetes stage with HP infection. Patients with positive stool antigen were allocated randomly into two groups. The treatment group took medication to eradicate HP infection by the routine method of four-drug eradication. However, placebo capsules and tablets were given to the patients in the placebo group. Then fasting plasma glucose (FPG), fasting plasma insulin (FPI), and quantitative C-reactive protein (CRP) levels were measured and homeostatic model assessment of insulin resistance (HOMA-IR), homeostatic model assessment of beta-cell function (HOMA-B), Matsuda index, insulinogenic index, and disposition index were calculated. RESULTS Results of this study showed that FPI and HOMA-IR increased significantly (P value of FPI = 0.023 and P value of HOMA-IR = 0.019) after HP eradication in the treatment group. On the other hand, comparison of differences at the baseline and after 6 weeks in FPG (P value = 0.045), FPI (P value = 0.013), and HOMA-B (P value = 0.038) revealed significant differences between the placebo group and treatment group. CONCLUSION Results showed that HP eradication by a 2-week antibiotic medication did not decrease insulin resistance and even increased FPI and insulin resistance indices. So HP eradication among prediabetic patients is not recommended for the decrease of insulin resistance and postponement of the development of diabetes mellitus.
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Affiliation(s)
- Ali Kachuei
- Department of Endocrinology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Masoud Amini
- Department of Endocrinology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Vahid Sebghatollahi
- Department of Gastroenterology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Awat Feizi
- Department of Biostatistics and Epidemiology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Pooria Hamedani
- Department of Endocrinology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Bijan Iraj
- Department of Endocrinology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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18
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Sabuncu T, Boduroglu O, Eren MA, Torun AN, Aksoy N. The Value of Serum Prolidase Activity in Progression of Microalbuminuria in Patients With Type 2 Diabetes Mellitus. J Clin Lab Anal 2015; 30:557-62. [PMID: 26666214 DOI: 10.1002/jcla.21902] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2012] [Revised: 03/24/2014] [Accepted: 09/21/2015] [Indexed: 11/12/2022] Open
Abstract
BACKGROUND Prolidase is a cytosolic exopeptidase that plays a pivotal role in collagen turnover. Diabetic nephropathy (DN) is associated with structural changes in glomerular basement membrane accompanied with increased amounts of collagen. Prolidase is known to be abundant in kidney and collagen accumulation is increased in DN, so we aimed to determine the value of serum prolidase activity (SPA) in predicting the progression of nephropathy in type 2 diabetes mellitus (DM). METHODS Thirty type 2 DM patients having microalbuminuria (microalbuminuric group), 30 type 2 DM patients without albuminuria (normoalbuminuric group), and 28 healthy controls (control group) were enrolled. Study groups had similar age, sex distribution, and body mass index (BMI). RESULTS Metabolic parameters, SPA and urinary microalbumin were determined. SPA was significantly higher in microalbuminuric group when compared with normoalbuminuric and control groups (P = 0.05 and P < 0.001, respectively). Triglyceride levels were significantly higher and high density lipoprotein cholesterol (HDL-C) levels were significantly lower in microalbuminuric group compared to control group (Both P < 0.05). SPA showed a negative correlation with HDL-C level and a positive correlation with urinary albumin excretion (r = -0.219, P < 0.05 and r = 0.39, P < 0.001 respectively). In regression analysis, albumin excretion was the sole parameter influencing SPA. CONCLUSION SPA appears to be higher in type 2 DM patients having microalbuminuria compared to patients without microalbuminuria and healthy controls. The pathophysiological role and the significance of SPA in predicting DN need to be further evaluated.
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Affiliation(s)
- Tevfik Sabuncu
- Department of Endocrinology and Metabolic Diseases, Harran University School of Medicine, Sanliurfa, Turkey
| | - Omer Boduroglu
- Department of Internal Medicine, Harran University School of Medicine, Sanliurfa, Turkey
| | - Mehmet Ali Eren
- Department of Endocrinology and Metabolic Diseases, Harran University School of Medicine, Sanliurfa, Turkey.
| | - Ayse Nur Torun
- Department of Endocrinology and Metabolic Diseases, Harran University School of Medicine, Sanliurfa, Turkey
| | - Nurten Aksoy
- Department of Clinical Biochemistry, Harran University School of Medicine, Sanliurfa, Turkey
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19
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Serum total oxidant and antioxidant status in earthquake survivors with post-traumatic stress disorder. Acta Neuropsychiatr 2015; 27:153-8. [PMID: 25597474 DOI: 10.1017/neu.2014.47] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
OBJECTIVE Oxidative stress has been shown to play an important role in the pathogenesis of post-traumatic stress disorder (PTSD). Although there are some studies on oxidative stress and PTSD, there is no report available on the serum total oxidant and antioxidant status in earthquake survivors with PTSD. Therefore, this study aimed to investigate the serum total oxidant and antioxidant status in earthquake survivors with chronic PTSD. MATERIAL AND METHODS The study group included 45 earthquake survivors with PTSD and 40 earthquake survivors without PTSD. The oxidative status was determined using the total antioxidant status and total oxidant status (TOS) measurements and by calculating the oxidative stress index (OSI). RESULTS There were no statistically significant differences in the total antioxidant status, TOS, or OSI when comparing individuals with and without PTSD (all, p>0.05). There were no correlations between Clinician-Administered PTSD Scale scores and oxidant and antioxidant stress markers (all, p>0.05). CONCLUSIONS Our results suggest that the total oxidant and antioxidant status may not affect earthquake survivors with PTSD. This is the first study to evaluate the oxidative status in earthquake survivors with PTSD. Further studies are necessary to confirm these findings.
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20
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Prolidase activity in chronic plaque psoriasis patients. Postepy Dermatol Alergol 2015; 32:82-7. [PMID: 26015776 PMCID: PMC4436238 DOI: 10.5114/pdia.2015.48049] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2014] [Revised: 04/15/2014] [Accepted: 09/10/2014] [Indexed: 11/17/2022] Open
Abstract
INTRODUCTION Psoriasis is a chronic, inflammatory, T-cell-mediated and hyperproliferative skin disease characterized by erythematous, squamous, sharply circumscribed and infiltrated plaques. The metabolisms of the collagen proteins undergo considerable changes due to the acceleration of their turnovers as a result of increased prolidase activity in psoriasis patients. AIM To determine the level of prolidase activity in psoriasis patients and evaluate its relationship with the oxidative system. MATERIAL AND METHODS The serum prolidase enzyme activity, total antioxidant levels and total oxidant levels of 40 psoriasis patients and a control group including 47 healthy individuals were analyzed by using their serum samples, and their oxidative stress indices were calculated. RESULTS The prolidase levels (p < 0.01), total oxidant levels (p < 0.01) and oxidative stress index levels (p < 0.001) of the patient group were higher than the corresponding parameters in the control group. The total antioxidant level was low (p < 0.01). Although a positive correlation was found between the prolidase and total antioxidant levels and the total oxidant level, no correlation was found between prolidase and the oxidative stress index. CONCLUSIONS It has been determined that the activity of the prolidase enzyme increases due to the increased collage turnover in psoriasis patients. Increased serum oxidant levels and oxidative stress indices values may play a role in the pathogenesis of psoriasis.
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21
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Sayın R, Aslan M, Kucukoglu ME, Luleci A, Atmaca M, Esen R, Demir H. Serum prolidase enzyme activity and oxidative stress levels in patients with diabetic neuropathy. Endocrine 2014; 47:146-51. [PMID: 24347244 DOI: 10.1007/s12020-013-0136-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2013] [Accepted: 11/22/2013] [Indexed: 12/19/2022]
Abstract
Previous studies have suggested that prolidase and nitric oxide (NO) regulate many processes, such as collagen synthesis and matrix remodeling. Oxidative stress plays an important role in the development of microvascular complications in diabetic patients. Data on serum prolidase activity in patients with diabetes mellitus or diabetic neuropathy (DN) are limited and conflicting. The aim of this study was to measure serum prolidase activity, NO, total antioxidant status (TAS), and malondialdehyde (MDA) levels in patients with DN. Forty-five patients with DN and 40 healthy controls were enrolled. Serum prolidase activity, TAS, MDA, and NO levels were determined. Serum MDA and NO levels were significantly higher in DN patients than controls (p = 0.002, p = 0.001, respectively), while prolidase activity and TAS levels were lower (p = 0.003, p = 0.001, respectively). Prolidase activity was negatively correlated with NO and MDA (r = -0.911, p < 0.001; r = -0.905, p < 0.001, respectively), while positively correlated with TAS (r = 0.981, p < 0.001) in DN patients. The current study is the first showing the decreased serum prolidase enzyme activity. Our results suggest that decreased collagen turnover may occur in DN patients, who have increased oxidative stress and increased NO levels. Decreased prolidase activity seems to be associated with increased NO levels and oxidative stress along with decreased antioxidant levels in DN. Therefore, decreased prolidase activity may play a role in pathogenesis of DN. Prospective clinical studies are necessary to confirm these findings.
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Affiliation(s)
- Refah Sayın
- Department of Neurology, Medical Faculty, Yuzuncu Yil University, Van, Turkey
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22
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Stanfliet JC, Locketz M, Berman P, Pillay TS. Evaluation of the utility of serum prolidase as a marker for liver fibrosis. J Clin Lab Anal 2014; 29:208-13. [PMID: 24798655 DOI: 10.1002/jcla.21752] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2013] [Revised: 02/28/2014] [Accepted: 03/03/2014] [Indexed: 12/18/2022] Open
Abstract
BACKGROUND Liver dysfunction is common and often unrecognized. Liver biopsy is the gold standard in the assessment of liver fibrosis, but has disadvantages. We assessed the diagnostic accuracy of serum prolidase enzyme activity (SPA) in predicting the presence and degree of liver fibrosis, as compared with liver biopsy. Further, we evaluated the effect of hemolysis on measured SPA levels. METHODS We undertook a prospective case control study. Thirty eight outpatients without apparent liver illness and 20 patients with liver pathology scheduled to undergo liver biopsy had their SPA levels measured. RESULTS Patients undergoing liver biopsy had higher SPA levels (361 (268) IU/l [median (interquartile range)]) compared with controls (169 (160) (P < 0.001)). A SPA cutoff value of 200 IU/l yielded a sensitivity of 89%, specificity of 59%, an odds ratio of 11.5, negative predictive value of 92%, and a positive predictive value of 50%. Hemolysis causes an apparent increase in SPA levels. CONCLUSION Higher SPA levels in patients undergoing liver biopsies compared with controls may reflect the presence of liver fibrosis. SPA levels could not be used to stage the degree of fibrosis. SPA measurement may be useful in the diagnostic workup of suspected liver disease.
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Affiliation(s)
- John C Stanfliet
- Division of Chemical Pathology, Department of Clinical Laboratory Sciences, University of Cape Town and National Health Laboratory Service, Cape Town, South Africa
| | - Michael Locketz
- Division of Anatomical Pathology, Department of Clinical Laboratory Sciences, University of Cape Town and National Health Laboratory Service, Cape Town, South Africa
| | - Peter Berman
- Division of Chemical Pathology, Department of Clinical Laboratory Sciences, University of Cape Town and National Health Laboratory Service, Cape Town, South Africa
| | - Tahir S Pillay
- Division of Chemical Pathology, Department of Clinical Laboratory Sciences, University of Cape Town and National Health Laboratory Service, Cape Town, South Africa.,Department of Chemical Pathology, Faculty of Health Sciences, University of Pretoria and National Health Laboratory Service, Tshwane Academic Division, Pretoria, South Africa
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23
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Malamug LR, Karnchanasorn R, Samoa R, Chiu KC. The Role of Helicobacter pylori Seropositivity in Insulin Sensitivity, Beta Cell Function, and Abnormal Glucose Tolerance. SCIENTIFICA 2014; 2014:870165. [PMID: 24790772 PMCID: PMC3984821 DOI: 10.1155/2014/870165] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2014] [Accepted: 02/25/2014] [Indexed: 06/03/2023]
Abstract
Infection, for example, Helicobacter pylori (H. pylori), has been thought to play a role in the pathogenesis of type 2 diabetes mellitus (T2DM). Our aim was to determine the role of H. pylori infection in glucose metabolism in an American cohort. We examined data from 4,136 non-Hispanic white (NHW), non-Hispanic black (NHB), and Mexican Americans (MA) aged 18 and over from the NHANES 1999-2000 cohort. We calculated the odds ratios for states of glucose tolerance based on the H. pylori status. We calculated and compared homeostatic model assessment insulin resistance (HOMA-IR) and beta cell function (HOMA-B) in subjects without diabetes based on the H. pylori status. The results were adjusted for age, body mass index (BMI), poverty index, education, alcohol consumption, tobacco use, and physical activity. The H. pylori status was not a risk factor for abnormal glucose tolerance. After adjustment for age and BMI and also adjustment for all covariates, no difference was found in either HOMA-IR or HOMA-B in all ethnic and gender groups except for a marginally significant difference in HOMA-IR in NHB females. H. pylori infection was not a risk factor for abnormal glucose tolerance, nor plays a major role in insulin resistance or beta cell dysfunction.
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Affiliation(s)
- Lou Rose Malamug
- Department of Clinical Diabetes, Endocrinology and Metabolism, City of Hope National Medical Center, 1500 East Duarte Road, Duarte, CA 91010, USA
- Division of Endocrinology, Metabolism and Nutrition, Department of Internal Medicine, Harbor-UCLA Medical Center, Torrance, CA 90502, USA
| | - Rudruidee Karnchanasorn
- Department of Clinical Diabetes, Endocrinology and Metabolism, City of Hope National Medical Center, 1500 East Duarte Road, Duarte, CA 91010, USA
- Division of Endocrinology, Metabolism and Nutrition, Department of Internal Medicine, Harbor-UCLA Medical Center, Torrance, CA 90502, USA
| | - Raynald Samoa
- Department of Clinical Diabetes, Endocrinology and Metabolism, City of Hope National Medical Center, 1500 East Duarte Road, Duarte, CA 91010, USA
- Division of Endocrinology, Metabolism and Nutrition, Department of Internal Medicine, Harbor-UCLA Medical Center, Torrance, CA 90502, USA
| | - Ken C. Chiu
- Department of Clinical Diabetes, Endocrinology and Metabolism, City of Hope National Medical Center, 1500 East Duarte Road, Duarte, CA 91010, USA
- Division of Endocrinology, Metabolism and Nutrition, Department of Internal Medicine, Harbor-UCLA Medical Center, Torrance, CA 90502, USA
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24
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Gonullu H, Aslan M, Karadas S, Kati C, Duran L, Milanlioglu A, Aydin MN, Demir H. Serum prolidase enzyme activity and oxidative stress levels in patients with acute hemorrhagic stroke. Scandinavian Journal of Clinical and Laboratory Investigation 2014; 74:199-205. [PMID: 24456419 DOI: 10.3109/00365513.2013.873949] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
BACKGROUND It has been indicated that oxidative damage contributes to secondary brain injury in both ischemic and hemorrhagic stroke patients. Collagen is a major component of the extracellular matrix, and prolidase plays a role in collagen synthesis. The aim of this study was to evaluate the serum prolidase activity, nitric oxide (NO) levels, total antioxidant capacity (TAC) and total oxidant status (TOS) in patients with acute hemorrhagic stroke. METHODS Twenty-five patients with acute hemorrhagic stroke and 25 controls were enrolled. Serum prolidase activity, catalase activity, NO levels, TAC and TOS were measured spectrophotometrically. Oxidative stress index (OSI) was calculated. RESULTS Serum TAC levels and catalase activity were significantly lower in acute hemorrhagic stroke patients than controls (both, p < 0.001), while NO levels, TOS levels, OSI values and prolidase activity were significantly higher (all, p < 0.01). When patients with acute hemorrhagic stroke were divided according to gender, no differences were observed between females and males in respect to serum prolidase enzyme activity, NO levels, TAC levels, TOS levels and OSI values (all, p > 0.05). CONCLUSIONS Findings from the study suggest an association between increased oxidative stress levels, decreased antioxidant levels and increased prolidase enzyme activity in patients with acute hemorrhagic stroke compared with controls. More studies are needed to elucidate mechanistic pathways on oxidative stress in patients with acute hemorrhagic stroke.
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Affiliation(s)
- Hayriye Gonullu
- Department of Emergency Medicine, Yuzuncu Yıl University , Van , Turkey
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25
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Rivera-Ordaz A, Bracher S, Sarrach S, Li Z, Shi L, Quick M, Hilger D, Haas R, Jung H. The sodium/proline transporter PutP of Helicobacter pylori. PLoS One 2013; 8:e83576. [PMID: 24358297 PMCID: PMC3866251 DOI: 10.1371/journal.pone.0083576] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Accepted: 11/14/2013] [Indexed: 01/29/2023] Open
Abstract
Helicobacter pylori is cause of chronic gastritis, duodenal ulcer and gastric carcinoma in humans. L-proline is a preferred energy source of the microaerophilic bacterium. Previous analyses revealed that HpputP and HpputA, the genes that are predicted to play a central role in proline metabolism as they encode for the proline transporter and proline dehydrogenase, respectively, are essential for stomach colonization. Here, the molecular basis of proline transport in H. pylori by HpPutP was investigated experimentally for the first time. Measuring radiolabeled substrate transport in H. pylori and E. coli heterologously expressing HpputP as well as in proteoliposomes reconstituted with HpPutP, we demonstrate that the observed proline transport in H. pylori is mediated by HpPutP. HpPutP is specific and exhibits a high affinity for L-proline. Notably, L-proline transport is exclusively dependent on Na+ as coupling ion, i.e., Na+/L-proline symport, reminiscent to the properties of PutP of E. coli even though H. pylori lives in a more acidic environment. Homology model-based structural comparisons and substitution analyses identified amino acids crucial for function. HpPutP-catalyzed proline uptake was efficiently inhibited by the known proline analogs 3,4-dehydro-D,L-proline and L-azetidine-2-carboxylic acid.
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Affiliation(s)
- Araceli Rivera-Ordaz
- Microbiology, Department of Biology I, Ludwig Maximilians University Munich, Martinsried, Germany
| | - Susanne Bracher
- Microbiology, Department of Biology I, Ludwig Maximilians University Munich, Martinsried, Germany
| | - Sannia Sarrach
- Microbiology, Department of Biology I, Ludwig Maximilians University Munich, Martinsried, Germany
| | - Zheng Li
- Department of Physiology and Biophysics, Weill Cornell Medical College, New York, New York, United States of America
| | - Lei Shi
- Department of Physiology and Biophysics, Weill Cornell Medical College, New York, New York, United States of America
- HRH Prince Alwaleed Bin Talal Bin Abdulaziz Alsaud Institute for Computational Biomedicine, Weill Cornell Medical College, New York, New York, United States of America
| | - Matthias Quick
- Center for Molecular Recognition and Department of Psychiatry, Columbia University College of Physicians and Surgeons, New York, New York, United States of America
| | - Daniel Hilger
- Microbiology, Department of Biology I, Ludwig Maximilians University Munich, Martinsried, Germany
| | - Rainer Haas
- Max von Pettenkofer Institute for Hygiene and Medical Microbiology, Ludwig Maximilians University Munich, Munich, Germany
| | - Heinrich Jung
- Microbiology, Department of Biology I, Ludwig Maximilians University Munich, Martinsried, Germany
- * E-mail:
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Serum prolidase activity, oxidant and antioxidant status in nonulcer dyspepsia and healthy volunteers. ISRN BIOCHEMISTRY 2013; 2013:182601. [PMID: 25937956 PMCID: PMC4392986 DOI: 10.1155/2013/182601] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Accepted: 09/10/2013] [Indexed: 12/29/2022]
Abstract
Helicobacter pylori (H. pylori) infection is associated with increased oxidative stress and serum prolidase activity (SPA) in many diseases. We aimed to observe SPA and oxidative stress in nonulcer dyspepsia (NUD) infected with and without H. pylori among eastern Indians. 106 patients with H. pylori positive NUD, 82 patients with H. pylori negative NUD, and 50 healthy individuals were selected. SPA, total antioxidant capacity (TAOC), and total oxidant status (TOS) were measured with the use of spectrophotometer and an automated measurement method. SPA, TOS, and oxidative stress index (OSI) were significantly higher in patients with H. pylori positive than H. pylori negative NUD and healthy individuals (all P < 0.0001), whereas TAOC was significantly lower (P < 0.0001). Nonsignificant, increased SPA (P value = 0.6083) and decreased TAOC (P value = 0.1186) were observed in patients with H. pylori negative NUD than healthy individuals, while increased TOS and OSI were significant (P < 0.0001). Weak, nonsignificant correlations were observed between serum prolidase activity and TAOC, TOS, and OSI in H. pylori positive cases. Thus, increased SPA along with increased oxidative stress was observed, which seem to be closely associated with H. pylori infection. SPA and oxidative stress seem to be used as biomarkers for H. pylori infection in NUD.
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Eren MA, Torun AN, Tabur S, Ulas T, Demir M, Sabuncu T, Aksoy N. Serum prolidase activity in diabetic foot ulcers. Acta Diabetol 2013; 50:423-7. [PMID: 23242638 DOI: 10.1007/s00592-012-0448-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2012] [Accepted: 12/03/2012] [Indexed: 12/19/2022]
Abstract
Impaired wound healing is an important problem in diabetes mellitus; however, its pathogenesis remains unclear. We aimed to evaluate serum prolidase activity (SPA), an important marker of collagen turnover, in subjects with and without diabetic foot ulcers as compared with healthy controls. Twenty-seven patients with diabetic foot ulcers (foot ulcer group), 27 patients without diabetic foot ulcers (diabetic control group) and 27 healthy controls were enrolled. The study groups had similar age, sex distribution and body mass index. Metabolic and inflammatory parameters as well as SPA were determined. The diabetic foot ulcer group had significantly higher SPA (both p < 0.001) when compared with the diabetic and the healthy control groups. SPA showed a positive correlation with high-sensitive C-reactive protein and a negative correlation with high-density lipoprotein cholesterol levels (r = 0.313, p = 0.021 and r = -0.233, p = 0.036, respectively). No correlation was detected between SPA and glycaemic parameters. SPA appears to be higher in patients with diabetic foot ulcers when compared with patients without diabetic foot ulcers and healthy controls. The underlying mechanisms of elevated SPA and its clinical significance in predicting the natural course of wound healing in diabetic foot ulcers needs to be further evaluation.
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Affiliation(s)
- Mehmet Ali Eren
- Department of Endocrinology, School of Medicine, Harran University, Sanliurfa, Turkey.
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Kitchener RL, Grunden AM. Prolidase function in proline metabolism and its medical and biotechnological applications. J Appl Microbiol 2012; 113:233-47. [PMID: 22512465 DOI: 10.1111/j.1365-2672.2012.05310.x] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Prolidase is a multifunctional enzyme that possesses the unique ability to degrade imidodipeptides in which a proline or hydroxyproline residue is located at the C-terminal end. Prolidases have been isolated from archaea and bacteria, where they are thought to participate in proline recycling. In mammalian species, prolidases are found in the cytoplasm and function primarily to liberate proline in the final stage of protein catabolism, particularly during the biosynthesis and degradation of collagen. Collagen comprises nearly one-third of the total protein in the body, and it is essential in maintaining tissue structure and integrity. Prolidase deficiency (PD), a rare autosomal recessive disorder in which mutations in the PEPD gene affect prolidase functionality, tends to have serious and sometimes life-threatening clinical symptoms. Recombinant prolidases have many applications and have been investigated not only as a possible treatment for PD, but also as a part of anti-cancer strategies, a component of biodecontamination cocktails and in the dairy industry. This review will serve to discuss the many in vivo functions of procaryotic and eucaryotic prolidases, as well as the most recent advances in therapeutic and biotechnological application of prolidases.
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Affiliation(s)
- R L Kitchener
- Department of Microbiology, North Carolina State University, Raleigh, NC, USA
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Abstract
We aimed to find out that whether collagen turnover is altered in the context of Legg-Calve-Perthes disease (LCPD) by evaluating serum prolidase activity. We also investigated the correlation between collagen turnover and oxidative-antioxidative status in LCPD. Plasma prolidase activity, total oxidant status (TOS), total antioxidant capacity, and oxidative stress index (OSI) were determined for 39 patients with LCPD and 40 healthy controls. Serum prolidase activity, TOS, and OSI were higher, but TAC was lower in patients with LCPD compared with controls. Prolidase activity was positively correlated with TOS and OSI levels. Serum prolidase activity is significantly associated with LCPD.
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Nazligul Y, Aslan M, Horoz M, Celik Y, Dulger AC, Celik H, Erel O. The effect on serum myeloperoxidase activity and oxidative status of eradication treatment in patients Helicobacter pylori infected. Clin Biochem 2011; 44:647-9. [PMID: 21396358 DOI: 10.1016/j.clinbiochem.2011.03.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Revised: 02/20/2011] [Accepted: 03/01/2011] [Indexed: 12/14/2022]
Abstract
OBJECTIVES Myeloperoxidase activity has been investigated after eradication of Helicobacter pylori (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. pylori-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.
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Affiliation(s)
- Yaşar Nazligul
- Kecioren Research Hospital, Department of Gastroenterology, Ankara, Turkey
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31
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Prolidase activity and its diagnostic performance in bipolar disorder. J Affect Disord 2011; 129:84-6. [PMID: 20888649 DOI: 10.1016/j.jad.2010.09.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2010] [Revised: 09/03/2010] [Accepted: 09/03/2010] [Indexed: 11/22/2022]
Abstract
OBJECTIVE Proline has an important role in the brain. Prolidase, a proline splitting enzyme, which is also involved in oxidative stress is not investigated in bipolar disorder (BD). METHODS 66 BD type I patients and 66 healthy controls were enrolled. Serum prolidase activity was measured in both groups via venous sampling. We have compared patients and controls as well as 3 subgroups of patients (24 euthymic, 22 manic, and 20 depressive patients). RESULTS Prolidase activity was significantly higher in patients (p<0.001, t=14.517). There wasn't any significant difference among euthymic, manic and depressives (p=0.305, f=1.211). Positive predictive value was 98.5% and negative predictive value was 92.4% above the cutoff point 502.9375U/L of prolidase activity. CONCLUSION Prolidase activity is impaired in BD, which may be associated with oxidative stress. Prolidase activity may be a trait marker for diagnosing bipolar disorder.
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Horoz M, Aslan M, Bolukbas FF, Bolukbas C, Nazligul Y, Celik H, Aksoy N. Serum prolidase enzyme activity and its relation to histopathological findings in patients with non-alcoholic steatohepatitis. J Clin Lab Anal 2011; 24:207-11. [PMID: 20486204 DOI: 10.1002/jcla.20334] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The aim of this study was to investigate serum prolidase enzyme activity and to find out its association with liver biopsy specimens' histopathological findings in patients with nonalcoholic steatohepatitis (NASH), which may progress to liver fibrosis and cirrhosis. Thirty-six patients with biopsy-proven NASH and 29 healthy controls were enrolled. Serum prolidase enzyme activity was measured spectrophotometrically. Serum prolidase enzyme activity was significantly higher in patients with NASH than controls (P=0.016). A significant correlation was observed between serum prolidase enzyme activity and fibrosis score in patients with NASH (r=0.661, P<0.001). Serum prolidase activity seems to be correlated with the level of fibrosis. Monitoring serum prolidase activity may be a useful adjunctive tool in predicting liver fibrosis, especially in the absence of advanced fibrosis and other conditions, which may affect the interpretation of prolidase activity.
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Affiliation(s)
- Mehmet Horoz
- School of Medicine, Department of Internal Medicine, Harran University, Sanliurfa, Turkey
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Bitiren M, Karakilcik AZ, Zerin M, Ozardali I, Selek S, Nazligül Y, Ozgonul A, Musa D, Uzunkoy A. Protective effects of selenium and vitamin E combination on experimental colitis in blood plasma and colon of rats. Biol Trace Elem Res 2010; 136:87-95. [PMID: 19774348 DOI: 10.1007/s12011-009-8518-3] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2009] [Accepted: 08/27/2009] [Indexed: 02/06/2023]
Abstract
Ulcerative colitis increases oxidative damage accompanied by production of free oxygen radicals. Selenium (Se) and vitamin E are two natural antioxidants. The present study was undertaken to investigate the possible protective role of Se and vitamin E combination in experimental colitis induced by acetic acid (AA) in rats. This study was carried out on three groups, namely the first (control), the second (experimental colitis group, 2 ml 5% acetic acid), and the third groups (2 ml 5% acetic acid, vitamin E (100 mg/kg body weight (bw)) plus Se (0.2 mg/kg bw)). The activities of catalase (CAT), prolidase (PRS), myeloperoxidase (MPO), total antioxidant capacity (TAC), total oxidant status (TOS), oxidative stress index (OSI), total thiol (T-SH) were determined in plasma and colon samples. Macroscopic and microscopic damages in colon were increased by AA treatment (p < 0.01 and p < 0.01, respectively), whereas they were decreased by selenium and vitamin E treatment (p < 0.05 and p < 0.01, respectively). The activities of CAT and PRS in the plasma and colon were significantly affected (p < 0.05 and p < 0.01) by treatment of AA, Se, and vitamin E. MPO activity in colon was increased (p < 0.01) by AA treatment and decreased (p < 0.05) by Se and vitamin E administration. The values of TOS and OSI in plasma were increased (p < 0.5) by AA. The TAC and T-SH in colon were decreased (p < 0.05) by AA and increased (p < 0.05) by Se and vitamin E. Based upon these results, Se and vitamin E may play an important role in preventive indication of the oxidative damage associated by acetic acid caused inflammation.
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Affiliation(s)
- Muharrem Bitiren
- Department of Pathology, Faculty of Medicine, University of Harran, Sanliurfa, 63200, Turkey
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Toy H, Camuzcuoglu H, Arioz DT, Kurt S, Celik H, Aksoy N. Serum prolidase activity and oxidative stress markers in pregnancies with intrauterine growth restricted infants. J Obstet Gynaecol Res 2009; 35:1047-53. [DOI: 10.1111/j.1447-0756.2009.01063.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Gunji T, Matsuhashi N, Sato H, Fujibayashi K, Okumura M, Sasabe N, Urabe A. Helicobacter pylori infection significantly increases insulin resistance in the asymptomatic Japanese population. Helicobacter 2009; 14:144-50. [PMID: 19751440 DOI: 10.1111/j.1523-5378.2009.00705.x] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Helicobacter pylori infection has been shown to contribute to atherosclerosis and cardiovascular diseases. Insulin resistance is the pathophysiologic background of the clinical features of atherosclerosis and cardiovascular diseases. We examined the association between H. pylori infection and insulin resistance in a large Japanese population. MATERIALS AND METHODS Fifteen hundred ninety-eight consecutive asymptomatic subjects that underwent a complete medical survey in our institute between May 2007 and July 2008 were recruited. Cases under medication for hypertension, hyperlipidemia, diabetes mellitus, hyperuricemia, or cardiovascular diseases were excluded from the study. Cases suffering from chronic renal or liver failure were also excluded. The homeostasis model assessment of insulin resistance (HOMA-IR) score was used to quantitatively estimate insulin resistance. Visceral and subcutaneous adipose tissues (SAT) were measured by computed tomography. The association between H. pylori serostatus and HOMA-IR score was investigated by multivariate regression analysis. RESULTS A total of 988 men and 119 women were eventually eligible for this cross-sectional survey. Helicobacter pylori seropositivity was significantly higher in 99 cases with insulin resistance (HOMA-IR >or=2.5) compared with 1008 cases without insulin resistance (HOMA-IR <2.5) (39.4 vs 28.7%, p = .027). There was a significant association between H. pylori serostatus and HOMA-IR score by multiple linear regression analysis (coefficients = 0.152, 95% CI = 0.058-0.246, p = .001), after adjusting for sex, age, body mass index, waist girth, visceral and subcutaneous adipose tissues, smoking status, alcohol consumption, dietary habits, and physical activity. CONCLUSIONS Helicobacter pylori infection significantly and independently contributed to promoting insulin resistance in a large asymptomatic population.
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Affiliation(s)
- Toshiaki Gunji
- Center for Preventive Medicine, Kanto Medical Center, NTT East, Tokyo, Japan
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Etoz OA, Ataoglu H, Erel O, Celik H, Herken EN, Bayazit YA. Association of Serum Total Antioxidant Capacity and Total Oxidant Status with Pain Perception in Patients with Myofacial pain Dysfunction. Int J Neurosci 2009; 119:1282-91. [DOI: 10.1080/00207450902907482] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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Abstract
OBJECTIVES Prolidase is a cytosolic exopeptidase that cleaves iminodipeptides with carboxy-terminal proline or hydroxyproline and plays major role in collagen turnover. Collagen is the essential content in atherosclerotic plaque playing a key role in the stability/instability of and progression of coronary artery disease (CAD). Consequently, in this study we sought to determine serum prolidase activity and markers of oxidative stress such as lipid hydroperoxide and total free sulfhydryl in CAD. DESIGN AND METHODS We have evaluated 199 patients with CAD and 122 control cases with clinical, electrocardiographic, and laboratory investigation. We have measured serum prolidase activity and serum total free sulfhydryl levels spectrophotometrically. Serum lipid hydroperoxide levels were determined with ferrous ion oxidation-xylenol orange method. We assessed the association of serum prolidase activity with the presence and severity of CAD and clinical characteristics, and laboratory parameters. RESULTS Serum prolidase activity (52.5+/-5.6 vs. 46.7+/-5.1 U/l, respectively, P<0.001) and serum lipid hydroperoxide levels were significantly increased in patients with CAD compared with control cases whereas, serum total free sulfhydryl levels were significantly decreased in patients with CAD compared with control cases. Serum prolidase activity and total free sulfhydryl levels were independent predictors of the presence of CAD [(chi=75.532, ss=0.212, P=0.003) and (chi=25.969, ss=-30.486, P=0.019), respectively] and Gensini score [(beta=0.276, P<0.001) and (beta=-0.274, P<0.001), respectively]. Independent predictors of serum prolidase activity were serum high-density lipoprotein cholesterol (beta=-0.138, P=0.023) and urea levels (beta=0.146, P=0.036), and Gensini score (beta=0.317, P<0.001). CONCLUSION Findings of this study have shown that serum prolidase activity is significantly associated with the presence and severity of CAD, and elevated serum prolidase activity might be an independent predictor of coronary atherosclerosis.
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Characterization of a Helicobacter hepaticus putA mutant strain in host colonization and oxidative stress. Infect Immun 2008; 76:3037-44. [PMID: 18458068 DOI: 10.1128/iai.01737-07] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Helicobacter hepaticus is a gram-negative, spiral-shaped microaerophilic bacterium associated with chronic intestinal infection leading to hepatitis and colonic and hepatic carcinomas in susceptible strains of mice. In the closely related human pathogen Helicobacter pylori, L-proline is a preferred respiratory substrate and is found at significantly high levels in the gastric juice of infected patients. A previous study of the proline catabolic PutA flavoenzymes from H. pylori and H. hepaticus revealed that Helicobacter PutA generates reactive oxygen species during proline oxidation by transferring electrons from reduced flavin to molecular oxygen. We further explored the preference for proline as a respiratory substrate and the potential impact of proline metabolism on the redox environment in Helicobacter species during host infection by disrupting the putA gene in H. hepaticus. The resulting putA knockout mutant strain was characterized by oxidative stress analysis and mouse infection studies. The putA mutant strain of H. hepaticus exhibited increased proline levels and resistance to oxidative stress relative to that of the wild-type strain, consistent with proline's role as an antioxidant. The significant increase in stress resistance was attributed to higher proline content, as no upregulation of antioxidant genes was observed for the putA mutant strain. The wild-type and putA mutant H. hepaticus strains displayed similar levels of infection in mice, but in mice challenged with the putA mutant strain, significantly reduced inflammation was observed, suggesting a role for proline metabolism in H. hepaticus pathogenicity in vivo.
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Aslan M, Nazligul Y, Horoz M, Bolukbas C, Bolukbas FF, Gur M, Celik H, Erel O. Serum paraoxonase-1 activity in Helicobacter pylori infected subjects. Atherosclerosis 2006; 196:270-274. [PMID: 17125774 DOI: 10.1016/j.atherosclerosis.2006.10.024] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2006] [Revised: 10/12/2006] [Accepted: 10/23/2006] [Indexed: 12/14/2022]
Abstract
Previous studies have suggested that Helicobacter pylori (H. pylori) infection may play an important role in the process of atherosclerosis. The objective of this study was to investigate serum paraoxonase and arylesterase activities, and lipid hydroperoxide (LOOH) and total thiol (SH) levels along with lipid parameters in H. pylori infected subjects. Fifty-six H. pylori positive subjects and 43 H. pylori negative subjects were enrolled. Serum paraoxonase and arylesterase activities were measured spectrophotometrically. LOOH levels were measured by FOX-2 assay. Serum SH levels, paraoxonase and arylesterase activities were significantly lower in H. pylori positive group than H. pylori negative group (all p<0.05), while LOOH levels were significantly higher (p<0.05). In H. pylori positive subjects, serum LOOH levels were correlated with SH levels (r=-0.247, p<0.05), serum paraoxonase (r=-0.432, p<0.05) and arylesterase activities (r=-0.404, p<0.001), and triglyceride (r=0.305, p<0.05), total cholesterol (r=0.568, p<0.05), high-density lipoprotein-cholesterol (HDL-C) (r=-0.300, p<0.05) and low-density lipoprotein-cholesterol (LDL-C) (r=0.577, p<0.05) levels. Serum paraoxonase and arylesterase activities were also correlated with HDL-C levels (r=0.221, p<0.05 and r=0.291, p<0.05, respectively), while no correlation was observed with triglyceride, total cholesterol and LDL-C levels (both p>0.05). In conclusion, paraoxonase and arylesterase activities decrease significantly in H. pylori infected subjects. Lower serum paraoxonase-1 (PON1) activity seems to be related to decrease in HDL-C and, in part, to increased oxidative stress and inflammatory condition induced by H. pylori infection. Measurement of serum PON1 activity may help in the early identification of H. pylori infected subjects with increased risk of atherosclerotic disease.
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Affiliation(s)
- Mehmet Aslan
- Harran University, School of Medicine, Department of Internal Medicine, Sanliurfa, Turkey.
| | - Yasar Nazligul
- Harran University, School of Medicine, Division of Gastroenterology, Sanliurfa, Turkey
| | - Mehmet Horoz
- Harran University, School of Medicine, Department of Internal Medicine, Sanliurfa, Turkey
| | - Cengiz Bolukbas
- Harran University, School of Medicine, Division of Gastroenterology, Sanliurfa, Turkey
| | - Fusun F Bolukbas
- Harran University, School of Medicine, Division of Gastroenterology, Sanliurfa, Turkey
| | - Mustafa Gur
- Harran University, School of Medicine, Department of Cardiology, Sanliurfa, Turkey
| | - Hakim Celik
- Harran University, School of Medicine, Department of Biochemistry, Sanliurfa, Turkey
| | - Ozcan Erel
- Harran University, School of Medicine, Department of Biochemistry, Sanliurfa, Turkey
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Aslan M, Horoz M, Nazligul Y, Bolukbas C, Bolukbas FF, Selek S, Celik H, Erel O. Insulin resistance in H pylori infection and its association with oxidative stress. World J Gastroenterol 2006; 12:6865-8. [PMID: 17106938 PMCID: PMC4087444 DOI: 10.3748/wjg.v12.i42.6865] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To determine the insulin resistance (IR) and oxidative status in H pylori infection and to find out if there is any relationship between these parameters and insulin resistance.
METHODS: Fifty-five H pylori positive and 48 H pylori negative patients were enrolled. The homeostasis model assessment (HOMA) was used to assess insulin resistance. Serum total antioxidant capacity (TAC), total oxidant status (TOS) and oxidative stress index (OSI) were determined in all subjects.
RESULTS: The total antioxidant capacity was significantly lower in H pylori positive group than in H pylori negative group (1.36 ± 0.33 and 1.70 ± 0.50, respectively; P < 0.001), while the total oxidant status and oxidative stress index were significantly higher in H pylori positive group than in H pylori negative group (6.79 ± 3.40 and 5.08 ± 0.95, and 5.42 ± 3.40 and 3.10 ± 0.92, respectively; P < 0.001). Insulin resistance was significantly higher in H pylori positive group than in H pylori negative group (6.92 ± 3.86 and 3.61 ± 1.67, respectively; P < 0.001). Insulin resistance was found to be significantly correlated with total antioxidant capacity (r = -0.251, P < 0.05), total oxidant status (r = 0.365, P < 0.05), and oxidative stress index (r = 0.267, P < 0.05).
CONCLUSION: Insulin resistance seems to be associated with increased oxidative stress in H pylori infection. Further studies are needed to clarify the mechanisms underlying this association and elucidate the effect of adding antioxidant vitamins to H pylori eradication therapy on insulin resistance during H pylori infection.
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Affiliation(s)
- Mehmet Aslan
- Department of Internal Medicine, Faculty of Medicine, Harran University, Bahcelievler Mah, Sema Apt A, Blok No. 8, Sanliurfa 63200, Turkey.
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