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Farhat F, Wasim S, Rehman L, Abidi SMA. Affinity purification, identification, and biochemical characterization of Gamma-glutamyl transpeptidase, a membrane anchored enzyme of Gigantocotyle explanatum. Parasitol Res 2023; 122:915-926. [PMID: 36719531 DOI: 10.1007/s00436-023-07786-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 01/25/2023] [Indexed: 02/01/2023]
Abstract
Gamma-glutamyl transpeptidase is an enzyme that facilitates the transfer of glutamyl groups from glutamyl peptides to other peptides or water. Additionally, it also participates in important processes such as amino acid transport, cellular redox control, drug detoxification, apoptosis, and DNA fragmentation in a various organism. In the present study, GGT activity in Gigantocotyle explanatum was examined in order to characterize the enzyme in the helminth system. GGT is isolated using membrane solubilization and purified through affinity column chromatography (Con-A Sepharose column). Km and Vmax values, as well as the optimal pH, optimal temperature, and incubation period, are also determined using enzyme kinetics. The hetero-dimeric property of the enzyme is demonstrated by the purified GGT, which yielded two subunits of 65.5 and 55 kDa. The optimal pH and temperature are found to be 8.0 and 37 °C, respectively. While assessing the optimal incubation time of the enzyme, it was observed that the purified GGT not only retained its functional integrity up to 15 min but also reflected considerable thermostability at higher temperatures, by retaining 78% and 25% of its initial activities at 50 °C and 60 °C, respectively. One millimolar concentration of 6-Diazo-5-Oxo Nor-isoleucine (DON), a specific inhibitor of GGT, completely abolished GGT activity. These results suggest that GGT in these worms is a catalytically active enzyme with distinguishing characteristics that can be used for further study to comprehend its function in amphistome biology and in host-parasite relationships, especially since the potential therapeutic candidacy of the GGT enzyme has already been indicated in these groups of organisms.
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Affiliation(s)
- Faiza Farhat
- Section of Parasitology, Department of Zoology, Aligarh Muslim University, Uttar Pradesh, Aligarh, 202002, India.
| | - Sobia Wasim
- College of Medicine, Gachon University, Incheon, South Korea
| | - Lubna Rehman
- Department of Lymphoma/Myeloma, MD Anderson Cancer Center, The University of Texas, Houston, TX, USA
| | - S M A Abidi
- Section of Parasitology, Department of Zoology, Aligarh Muslim University, Uttar Pradesh, Aligarh, 202002, India
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2
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Antihelminthic effect of thymoquinone against biliary amphistome, Gigantocotyle explanatum. Exp Parasitol 2022; 243:108421. [DOI: 10.1016/j.exppara.2022.108421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 10/20/2022] [Accepted: 10/25/2022] [Indexed: 11/08/2022]
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Muñoz-Prieto A, Cerón JJ, Rubio CP, Contreras-Aguilar MD, Pardo-Marín L, Ayala-de la Peña I, Martín-Cuervo M, Holm Henriksen IM, Arense-Gonzalo JJ, Tecles F, Hansen S. Evaluation of a Comprehensive Profile of Salivary Analytes for the Diagnosis of the Equine Gastric Ulcer Syndrome. Animals (Basel) 2022; 12:ani12233261. [PMID: 36496782 PMCID: PMC9740180 DOI: 10.3390/ani12233261] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 11/14/2022] [Accepted: 11/21/2022] [Indexed: 11/25/2022] Open
Abstract
In this report, the measurement of salivary biomarkers as an aid for diagnosis of equine gastric ulcer syndrome (EGUS) was studied. A comprehensive panel of 23 salivary analytes was measured in the saliva of horses affected by EGUS and compared to healthy animals and horses with other diseases clinically similar to EGUS but with a negative diagnosis at gastroscopic examination. A total of 147 horses were included in the study and divided into heathy population (n = 12), the EGUS group (n = 110), and the group of horses with other diseases (n = 25). From the 23 analytes studied, 17 showed increased values in EGUS horses when compared to healthy ones, and uric acid, triglycerides, and calcium were significantly increased in horses with EGUS compared to the group of other diseases. The receiver operating characteristic curve analyses showed a modest but significant discriminatory power of those three analytes to identify EGUS from other diseases with similar symptoms. The discriminatory power enhanced when the results of the three analytes were combined. In conclusion, the results showed that selected salivary analytes could have potential use as biomarkers in horses with EGUS.
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Affiliation(s)
- Alberto Muñoz-Prieto
- Interdisciplinary Laboratory of Clinical Analysis of the University of Murcia (Interlab-UMU), Regional Campus of International Excellence ‘Campus Mare Nostrum’, University of Murcia, Campus de Espinardo s/n, Espinardo, 30100 Murcia, Spain
- Clinic for Internal Diseases, Faculty of Veterinary Medicine, University of Zagreb, Heinzelova 55, 10000 Zagreb, Croatia
| | - José J. Cerón
- Interdisciplinary Laboratory of Clinical Analysis of the University of Murcia (Interlab-UMU), Regional Campus of International Excellence ‘Campus Mare Nostrum’, University of Murcia, Campus de Espinardo s/n, Espinardo, 30100 Murcia, Spain
| | - Camila P. Rubio
- Interdisciplinary Laboratory of Clinical Analysis of the University of Murcia (Interlab-UMU), Regional Campus of International Excellence ‘Campus Mare Nostrum’, University of Murcia, Campus de Espinardo s/n, Espinardo, 30100 Murcia, Spain
| | - María Dolores Contreras-Aguilar
- Interdisciplinary Laboratory of Clinical Analysis of the University of Murcia (Interlab-UMU), Regional Campus of International Excellence ‘Campus Mare Nostrum’, University of Murcia, Campus de Espinardo s/n, Espinardo, 30100 Murcia, Spain
| | - Luis Pardo-Marín
- Interdisciplinary Laboratory of Clinical Analysis of the University of Murcia (Interlab-UMU), Regional Campus of International Excellence ‘Campus Mare Nostrum’, University of Murcia, Campus de Espinardo s/n, Espinardo, 30100 Murcia, Spain
| | - Ignacio Ayala-de la Peña
- Animal Medicine and Surgery Department, Regional Campus of International Excellence ‘Campus Mare Nostrum’, University of Murcia, Campus de Espinardo s/n, Espinardo, 30100 Murcia, Spain
| | - María Martín-Cuervo
- Animal Medicine, Faculty of Veterinary Medicine of Cáceres, University of Extremadura, Av. de la Universidad S-N, 10005 Cáceres, Spain
| | - Ida-Marie Holm Henriksen
- Department of Veterinary Clinical Sciences, Veterinary School of Medicine, Sektion Medicine and Surgery, University of Copenhagen, Hoejbakkegaard Allé 5, DK-2630 Høje-Taastrup, Denmark
| | - Julián J. Arense-Gonzalo
- Institute for Biomedical Research of Murcia, IMIB-Arrixaca, El Palmar, 30120 Murcia, Spain
- Division of Preventive Medicine and Public Health Sciences, School of Medicine, University of Murcia, Espinardo, 30100 Murcia, Spain
| | - Fernando Tecles
- Interdisciplinary Laboratory of Clinical Analysis of the University of Murcia (Interlab-UMU), Regional Campus of International Excellence ‘Campus Mare Nostrum’, University of Murcia, Campus de Espinardo s/n, Espinardo, 30100 Murcia, Spain
- Correspondence: ; Tel.: +34-868887082
| | - Sanni Hansen
- Department of Veterinary Clinical Sciences, Veterinary School of Medicine, Sektion Medicine and Surgery, University of Copenhagen, Hoejbakkegaard Allé 5, DK-2630 Høje-Taastrup, Denmark
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Yuan C, Wu M, Chen X, Li C, Zhang A, Lu W. Growth Performance and Hematological Changes in Growing Sika Deers Fed with Spent Mushroom Substrate of Pleurotus ostreatus. Animals (Basel) 2022; 12:ani12060765. [PMID: 35327162 PMCID: PMC8944863 DOI: 10.3390/ani12060765] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 03/16/2022] [Accepted: 03/16/2022] [Indexed: 02/05/2023] Open
Abstract
Simple Summary With the rapid development of the mushroom industry, a large number of spent mushroom substrate (SMS) has also been produced. SMS can be easily digested by ruminants and is suitable for feeding animals, such as cows, sheep, as well as deer. The results of this study show that the dietary spent mushroom substrate of Pleurotus ostreatus (SMS-MP) has no obvious effect on the physiological condition of growing sika deer, at the same time it can reduce the cost of feeding and avoid environmental pollution caused by improper disposal of SMS-MP. Abstract The purpose of this experiment is to expand the feed of growing sika deer and to explore the effects on growing sika deer of the spent mushroom substrate of Pleurotus ostreatus (SMS-MP). Twelve immature female growing sika deer were randomly assigned to four groups. The ratios of SMS-MP to replace concentration supplements were 0%, 10%, 20%, and 30%, respectively, and the growth performance, feed intake and apparent digestibility, serum biochemical indexes, blood physiological indexes, serum immune globulin and plasma amino acid of growing sika deer were measured. The results of the current study confirmed the applicability of SMS-MP as a feed ingredient in growing sika deer diets. There was no significant change in growth performance and hematology of growing sika deer when the concentrate supplement was replaced with 10–20% SMS-MP. However, replacing 30% of concentrate supplements with SMS-MP in the growing sika deer diet resulted in significantly decreased Hb and HCT levels. It can be concluded that, as a waste resource, adding a small amount of SMS-MP has no significant effect on the growth of sika deer, and at the same time can reduce the consumption of concentrate supplements, thereby improving the economic benefits of sika deer breeding.
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Affiliation(s)
| | | | | | | | - Aiwu Zhang
- Correspondence: (A.Z.); (W.L.); Tel.: +86-138-441-02196 (W.L.)
| | - Wenfa Lu
- Correspondence: (A.Z.); (W.L.); Tel.: +86-138-441-02196 (W.L.)
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Kim J, Han K, Yoo J, Park KA, Oh SY. Liver enzymes and risk of ocular motor cranial nerve palsy: a nationwide population-based study. Neurol Sci 2021; 43:3395-3405. [PMID: 34811598 DOI: 10.1007/s10072-021-05735-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 11/03/2021] [Indexed: 01/09/2023]
Abstract
This study aimed to assess the associations between liver enzymes including γ-glutamyl transferase (GGT) and the development of ocular motor cranial nerve palsy (CNP) using the National Sample Cohort database from Korea's National Health Insurance Service. We analyzed data from 4,233,273 medical screening examinees aged 20 years or more in 2009. Study participants were followed up until December 31, 2018. A Cox proportional hazard regression analysis was performed for quartiles of liver enzymes to determine the linkage between each value and ocular motor CNP using quartile 1 as a reference after adjusting for potential confounders. A total of 5,807 (0.14%) patients developed ocular motor CNP during the follow-up period of 8.22 ± 0.94 years. The incidence of ocular motor CNP gradually increased as the GGT levels increased. The highest quartile of the GGT group had hazard ratio (HR) of 1.245 (95% confidence interval [CI], 1.136-1.365). Regarding alanine aminotransferase (ALT), the highest quartile of the ALT group had HR of 1.141 (95% CI, 1.049-1.241). However, the incidence of ocular motor CNP did not gradually increase as the ALT levels increased. The coexistence of the increased level of GGT, metabolic syndrome, and obesity showed a stronger association with ocular motor CNP development (HR, 1.331; 95% CI, 1.173, 1.511) compared to having a single factor or two factors. In conclusion, our population-based cohort study demonstrated a significant association between serum GGT level and the incidence of ocular motor CNP, suggesting that GGT could be a new clinical marker for predicting the occurrence of ocular motor CNP.
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Affiliation(s)
- Joonhyoung Kim
- Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Kyungdo Han
- Department of Statistics and Actuarial Science, Soongsil University, Seoul, Republic of Korea.
| | - Juhwan Yoo
- Department of Biomedicine and Health Science, The Catholic University of Korea, Seoul, Republic of Korea
| | - Kyung-Ah Park
- Department of Ophthalmology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.
| | - Sei Yeul Oh
- Department of Ophthalmology, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea
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Jiang T, Lyu SC, Zhou L, Wang J, Li H, He Q, Lang R. Carbohydrate antigen 19-9 as a novel prognostic biomarker in distal cholangiocarcinoma. World J Gastrointest Surg 2021; 13:1025-1038. [PMID: 34621478 PMCID: PMC8462080 DOI: 10.4240/wjgs.v13.i9.1025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 06/18/2021] [Accepted: 08/19/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Distal cholangiocarcinoma (DCC) presents as one of the relatively rare malignant tumors in the digestive system and has a poor long-term prognosis. Curative resection is currently the most appropriate therapy for patients with DCC because of the lack of effective adjuvant therapies. Therefore, it is important to accurately predict the prognosis for formulating a reasonable treatment plan and avoiding unnecessary surgical trauma.
AIM To minimize the interference of obstructive jaundice on carbohydrate antigen 19-9 (CA19-9) level by adapting CA19-9 to γ-glutamyltransferase (GGT) as an indicator, to determine the strong associations between CA19-9/GGT and postoperative neoplasm recurrence and long-term outcome of DCC.
METHODS We enrolled 186 patients who were diagnosed with DCC between January 2010 and December 2019 and performed radical excision with strict criteria as follows in our hospital. Receiver operating characteristic curves were drawn according to preoperative CA19-9/GGT and 1-year survival. Based on this, patients were divided into two groups (group 1, low-ratio, n = 81; group 2, high-ratio, n = 105). Afterwards, by the way of univariate and multivariate analysis, the risk factors influencing postoperative tumor recrudesce and long-term prognosis of patients with DCC were screened out.
RESULTS Optimum cut-off value of CA19-9/GGT was 0.12. Patients in group 2 represented higher CA19-9 and lymphatic metastasis rate accompanied by lower GGT, when compared with group 1 (P < 0.05). The 1-, 3- and 5-year overall survival rates of patients in groups 1 and 2 were 88.3%, 59.2% and 48.1%, and 61.0%, 13.6% and 13.6%, respectively (P = 0.000). Multivariate analysis indicated that CA19-9/GGT, lymphatic metastasis and tumor differentiation were independent risk factors for tumor recurrence and long-term prognosis of DCC.
CONCLUSION Elevation of CA19-9/GGT performed better as a biomarker of aggressive carcinoma and predictor of poor clinical outcomes by reducing the effect of obstruction of biliary tract on CA19-9 concentration in patients with DCC.
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Affiliation(s)
- Tao Jiang
- Department of Hepatobiliary Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
| | - Shao-Cheng Lyu
- Department of Hepatobiliary Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
| | - Lin Zhou
- Department of Hepatobiliary Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
| | - Jing Wang
- Department of Hepatobiliary Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
| | - Han Li
- Department of Hepatobiliary Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
| | - Qiang He
- Department of Hepatobiliary Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
| | - Ren Lang
- Department of Hepatobiliary Surgery, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China
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Corti A, Belcastro E, Dominici S, Maellaro E, Pompella A. The dark side of gamma-glutamyltransferase (GGT): Pathogenic effects of an 'antioxidant' enzyme. Free Radic Biol Med 2020; 160:807-819. [PMID: 32916278 DOI: 10.1016/j.freeradbiomed.2020.09.005] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 08/26/2020] [Accepted: 09/01/2020] [Indexed: 12/16/2022]
Abstract
Having long been regarded as just a member in the cellular antioxidant systems, as well as a clinical biomarker of hepatobiliary diseases and alcohol abuse, gamma-glutamyltransferase (GGT) enzyme activity has been highlighted by more recent research as a critical factor in modulation of redox equilibria within the cell and in its surroundings. Moreover, due to the prooxidant reactions which can originate during its metabolic function in selected conditions, experimental and clinical studies are increasingly involving GGT in the pathogenesis of several important disease conditions, such as atherosclerosis, cardiovascular diseases, cancer, lung inflammation, neuroinflammation and bone disorders. The present article is an overview of the laboratory findings that have prompted an evolution in interpretation of the significance of GGT in human pathophysiology.
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Affiliation(s)
- Alessandro Corti
- Dept. of Translational Research NTMS, University of Pisa Medical School, Italy
| | - Eugenia Belcastro
- Dept. of Translational Research NTMS, University of Pisa Medical School, Italy
| | - Silvia Dominici
- Dept. of Translational Research NTMS, University of Pisa Medical School, Italy
| | - Emilia Maellaro
- Dept. of Molecular and Developmental Medicine, University of Siena, Italy
| | - Alfonso Pompella
- Dept. of Translational Research NTMS, University of Pisa Medical School, Italy.
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Corti A, Bonetti J, Dominici S, Piaggi S, Fierabracci V, Foddis R, Pompella A. Induction of Gamma-Glutamyltransferase Activity and Consequent Pro-oxidant Reactions in Human Macrophages Exposed to Crocidolite Asbestos. Toxicol Sci 2020; 177:476-482. [PMID: 31388672 DOI: 10.1093/toxsci/kfz175] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Asbestos is the main causative agent of malignant pleural mesothelioma. The variety known as crocidolite (blue asbestos) owns the highest pathogenic potential, due to the dimensions of its fibers as well as to its content of iron. The latter can in fact react with macrophage-derived hydrogen peroxide in the so called Fenton reaction, giving rise to highly reactive and mutagenic hydroxyl radical. On the other hand, hydroxyl radical can as well originate after thiol-dependent reduction of iron, a process capable of starting its redox cycling. Previous studies showed that glutathione (GSH) is one such thiol, and that cellular gamma-glutamyltransferase (GGT) can efficiently potentiate GSH-dependent iron redox cycling and consequent oxidative stress. As GGT is expressed in macrophages and is released upon their activation, the present study was aimed at verifying the hypothesis that GSH/GGT-dependent redox reactions may participate in the oxidative stress following the activation of macrophages induced by crocidolite asbestos. Experiments in acellular systems confirmed that GGT-mediated metabolism of GSH can potentiate crocidolite-dependent production of superoxide anion, through the production of highly reactive dipeptide thiol cysteinyl-glycine. Cultured THP-1 macrophagic cells, as well as isolated monocytes obtained from healthy donors and differentiated to macrophages in vitro, were investigated as to their expression of GGT and the effects of exposure to crocidolite. The results show that crocidolite asbestos at subtoxic concentrations (50-250 ng/1000 cells) can upregulate GGT expression, which raises the possibility that macrophage-initiated, GSH/GGT-dependent pro-oxidant reactions may participate in the pathogenesis of tissue damage and inflammation consequent to crocidolite intoxication.
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Affiliation(s)
- Alessandro Corti
- Department of Translational Research NTMS, University of Pisa Medical School, Pisa 56126, Italy
| | | | - Silvia Dominici
- Department of Translational Research NTMS, University of Pisa Medical School, Pisa 56126, Italy
| | - Simona Piaggi
- Department of Translational Research NTMS, University of Pisa Medical School, Pisa 56126, Italy
| | - Vanna Fierabracci
- Department of Translational Research NTMS, University of Pisa Medical School, Pisa 56126, Italy
| | - Rudy Foddis
- Department of Translational Research NTMS, University of Pisa Medical School, Pisa 56126, Italy
| | - Alfonso Pompella
- Department of Translational Research NTMS, University of Pisa Medical School, Pisa 56126, Italy
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Zhang J, Duan D, Song ZL, Liu T, Hou Y, Fang J. Small molecules regulating reactive oxygen species homeostasis for cancer therapy. Med Res Rev 2020; 41:342-394. [PMID: 32981100 DOI: 10.1002/med.21734] [Citation(s) in RCA: 87] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 07/27/2020] [Accepted: 08/22/2020] [Indexed: 12/13/2022]
Abstract
Elevated intracellular reactive oxygen species (ROS) and antioxidant defense systems have been recognized as one of the hallmarks of cancer cells. Compared with normal cells, cancer cells exhibit increased ROS to maintain their malignant phenotypes and are more dependent on the "redox adaptation" mechanism. Thus, there are two apparently contradictory but virtually complementary therapeutic strategies for the regulation of ROS to prevent or treat cancer. The first strategy, that is, chemoprevention, is to prevent or reduce intracellular ROS either by suppressing ROS production pathways or by employing antioxidants to enhance ROS clearance, which protects normal cells from malignant transformation and inhibits the early stage of tumorigenesis. The second strategy is the ROS-mediated anticancer therapy, which stimulates intracellular ROS to a toxicity threshold to activate ROS-induced cell death pathways. Therefore, targeting the regulation of intracellular ROS-related pathways by small-molecule candidates is considered to be a promising treatment for tumors. We herein first briefly introduce the source and regulation of ROS, and then focus on small molecules that regulate ROS-related pathways and show efficacy in cancer therapy from the perspective of pharmacophores. Finally, we discuss several challenges in developing cancer therapeutic agents based on ROS regulation and propose the direction of future development.
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Affiliation(s)
- Junmin Zhang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, and School of Pharmacy, Lanzhou University, Lanzhou, China
| | - Dongzhu Duan
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, and School of Pharmacy, Lanzhou University, Lanzhou, China.,Shaanxi Key Laboratory of Phytochemistry, Baoji University of Arts and Sciences, Baoji, China
| | - Zi-Long Song
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, and School of Pharmacy, Lanzhou University, Lanzhou, China
| | - Tianyu Liu
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, and School of Pharmacy, Lanzhou University, Lanzhou, China
| | - Yanan Hou
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, and School of Pharmacy, Lanzhou University, Lanzhou, China
| | - Jianguo Fang
- State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, and School of Pharmacy, Lanzhou University, Lanzhou, China
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Bjørklund G, Rajib SA, Saffoon N, Pen JJ, Chirumbolo S. Insights on Melatonin as an Active Pharmacological Molecule in Cancer Prevention: What's New? Curr Med Chem 2019; 26:6304-6320. [PMID: 29714136 DOI: 10.2174/0929867325666180501094850] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 04/10/2018] [Accepted: 04/18/2018] [Indexed: 12/12/2022]
Abstract
Along with playing an important role in circadian rhythm, melatonin is thought to play a significant role in preventing cells from damage, as well as in the inhibition of growth and in triggering apoptosis in malignant cells. Its relationship with circadian rhythms, energetic homeostasis, diet, and metabolism, is fundamental to achieve a better comprehension of how melatonin has been considered a chemopreventive molecule, though very few papers dealing with this issue. In this article, we tried to review the most recent evidence regarding the protective as well as the antitumoral mechanisms of melatonin, as related to diet and metabolic balance. From different studies, it was evident that an intracellular antioxidant defense mechanism is activated by upregulating an antioxidant gene battery in the presence of high-dose melatonin in malignant cells. Like other broad-spectrum antioxidant molecules, melatonin plays a vital role in killing tumor cells, preventing metastasis, and simultaneously keeping normal cells protected from oxidative stress and other types of tissue damage.
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Affiliation(s)
- Geir Bjørklund
- Council for Nutritional and Environmental Medicine, Mo i Rana, Norway
| | | | - Nadia Saffoon
- Department of Pharmacy and Forensic Science, Faculty of Life Science and Medicine, King's College London, London, United Kingdom
| | - Joeri J Pen
- Diabetes Clinic, Department of Internal Medicine, UZ Brussel, Vrije Universiteit Brussel (VUB), Brussels, Belgium.,Department of Nutrition, UZ Brussel, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Salvatore Chirumbolo
- Department of Neurosciences, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
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Wang S, Xiao C, Guo L, Ling L, Li M, Li H, Guo X. Rapidly quantitative analysis of γ-glutamyltranspeptidase activity in the lysate and blood via a rational design of the molecular probe by matrix-assisted laser desorption ionization mass spectrometry. Talanta 2019; 205:120141. [DOI: 10.1016/j.talanta.2019.120141] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 06/29/2019] [Accepted: 07/08/2019] [Indexed: 02/06/2023]
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12
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Kim YJ, Park SJ, Lim CS, Lee DJ, Noh CK, Lee K, Shin SJ, Kim HM. Ratiometric Detection of γ-Glutamyltransferase in Human Colon Cancer Tissues Using a Two-Photon Probe. Anal Chem 2019; 91:9246-9250. [PMID: 31265245 DOI: 10.1021/acs.analchem.9b02137] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
γ-Glutamyltransferase (GGT) plays a role in cleaving the γ-glutamyl bond of glutathione. The GGT is known to be overexpressed in some tumors and has been recognized as a potential biomarker for malignant tumors. Colon cancer is one of the most common cancers worldwide; however, there is no quantitative method for detecting cancer cells in human colon tissues. In this study, we report a ratiometric two-photon probe for GGT that can be applied in human colon tissues. The probe (Probe 2) showed high fluorescence efficiency, marked fluorescence changes, excellent kinetics, and selectivity for the GGT in live colon cells. Additionally, we obtained ratiometric two-photon microscopy images of GGT activity in human colon tissue. We used this method to compare normal and cancer tissues based on their ratio values; the ratio value was higher in cancer tissue than in normal tissue. This study provides a method for quantitative analysis of GGT, particularly in human colon cancer, which will be useful for studying GGT-related diseases and diagnosing colon cancer.
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Affiliation(s)
- Yun Ji Kim
- Department of Energy Systems Research and Department of Chemistry , Ajou University , Suwon 16499 , Korea
| | - Sang Jun Park
- Department of Energy Systems Research and Department of Chemistry , Ajou University , Suwon 16499 , Korea
| | - Chang Su Lim
- Department of Energy Systems Research and Department of Chemistry , Ajou University , Suwon 16499 , Korea
| | - Dong Jun Lee
- Department of Energy Systems Research and Department of Chemistry , Ajou University , Suwon 16499 , Korea
| | - Choong-Kyun Noh
- Department of Gastroenterology , Ajou University School of Medicine , Suwon 16499 , Korea
| | - Kiyoun Lee
- Department of Chemistry , The Catholic University of Korea , Bucheon 14662 , Korea
| | - Sung Jae Shin
- Department of Gastroenterology , Ajou University School of Medicine , Suwon 16499 , Korea
| | - Hwan Myung Kim
- Department of Energy Systems Research and Department of Chemistry , Ajou University , Suwon 16499 , Korea
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Reiser E, Aust S, Seebacher V, Reinthaller A, von Mersi H, Schwameis R, Polterauer S, Grimm C, Helmy-Bader S. Gamma-glutamyltransferase as a preoperative differential diagnostic marker in patients with adnexal mass. Eur J Obstet Gynecol Reprod Biol 2019; 239:16-20. [PMID: 31158789 DOI: 10.1016/j.ejogrb.2019.05.031] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 05/22/2019] [Accepted: 05/24/2019] [Indexed: 01/27/2023]
Abstract
OBJECTIVE Gamma-glutamyltransferase (GGT) is involved in tumor development, progression and chemotherapy resistance. The present study evaluated GGT serum levels as a preoperative predictive marker for ovarian cancer in patients with adnexal mass. STUDY DESIGN Preoperative GGT serum levels of 2235 patients with adnexal mass and subsequent surgery were ascertained (patients with benign ovarian tumors: n = 1811; borderline tumor of the ovary [BTO]: n = 85; epithelial ovarian cancer [EOC]: n = 339). Standardized expert transvaginal ultrasound was documented. RESULTS Median (interquartile range) GGT serum levels in patients with benign ovarian tumors, BTO, and EOC were 15.0 U/l (11.0-23.0), 17.0 U/l (10.0-23.5), and 20.0 U/l (13.0-34.0), respectively (p = 0.002). Elevated GGT serum levels were associated with the presence of BTO/EOC in univariate analysis (p < 0.0001, hazard ratio 1.8, confidence interval 1.5-2.3). GGT did not outperform established tools for preoperative prediction of BTO/EOC in patients with adnexal mass, such as CA-125 measurement or transvaginal ultrasound. CONCLUSION Elevated GGT serum levels were not associated with the presence of BTO/EOC in women with suspicious adnexal mass in multivariate analysis. GGT serum levels did not outperform established risk factors and therefore might add only limited additional value to CA-125 serum levels in the differential diagnosis between benign and malignant adnexal masses.
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Affiliation(s)
- Elisabeth Reiser
- Medical University of Vienna, Comprehensive Cancer Center, Department of Obstetrics and Gynecology, Division of General Gynecology and Gynecologic Oncology, Vienna, Austria
| | - Stefanie Aust
- Medical University of Vienna, Comprehensive Cancer Center, Department of Obstetrics and Gynecology, Division of General Gynecology and Gynecologic Oncology, Vienna, Austria
| | - Veronika Seebacher
- Medical University of Vienna, Comprehensive Cancer Center, Department of Obstetrics and Gynecology, Division of General Gynecology and Gynecologic Oncology, Vienna, Austria
| | - Alexander Reinthaller
- Medical University of Vienna, Comprehensive Cancer Center, Department of Obstetrics and Gynecology, Division of General Gynecology and Gynecologic Oncology, Vienna, Austria; Karl Landsteiner Institute for General Gynecology and Experimental Gynecologic Oncology, Vienna, Austria
| | - Hannah von Mersi
- Medical University of Vienna, Comprehensive Cancer Center, Department of Obstetrics and Gynecology, Division of General Gynecology and Gynecologic Oncology, Vienna, Austria; Karl Landsteiner Institute for General Gynecology and Experimental Gynecologic Oncology, Vienna, Austria
| | - Richard Schwameis
- Medical University of Vienna, Comprehensive Cancer Center, Department of Obstetrics and Gynecology, Division of General Gynecology and Gynecologic Oncology, Vienna, Austria
| | - Stephan Polterauer
- Medical University of Vienna, Comprehensive Cancer Center, Department of Obstetrics and Gynecology, Division of General Gynecology and Gynecologic Oncology, Vienna, Austria; Karl Landsteiner Institute for General Gynecology and Experimental Gynecologic Oncology, Vienna, Austria
| | - Christoph Grimm
- Medical University of Vienna, Comprehensive Cancer Center, Department of Obstetrics and Gynecology, Division of General Gynecology and Gynecologic Oncology, Vienna, Austria.
| | - Samir Helmy-Bader
- Medical University of Vienna, Comprehensive Cancer Center, Department of Obstetrics and Gynecology, Division of General Gynecology and Gynecologic Oncology, Vienna, Austria
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Bozkaya Y, Yazıcı O. Prognostic significance of gamma-glutamyl transferase in patients with metastatic non-small cell lung cancer. Expert Rev Mol Diagn 2019; 19:267-272. [PMID: 30722710 DOI: 10.1080/14737159.2019.1579644] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND The prognostic significance of serum gamma-glutamyl transferase (GGT) level at diagnosis in patients with metastatic non-small lung cancer (NSCLC) is not clear. We aimed to assess the relationship between serum GGT level and overall survival (OS) and progression-free survival (PFS) in this patient population. METHODS Data of patients with metastatic NSCLC who were admitted to the medical oncology clinic of our hospital during April 2013-December 2017 were retrospectively analyzed. Patients were divided into two groups based on GGT levels, normal and high (as defined by normal reference levels), and then compared. RESULTS Significant differences between the high and normal GGT level groups were found regarding female sex, Eastern Cooperative Oncology Group performance score, weight loss at the time of diagnosis, and lactate dehydrogenase level (p < 0.05). The high GGT group had a shorter median OS (11.5 vs. 3.4 months, p < 0.001) and PFS (7.8 vs. 3.0 months, p = 0.001). High GGT level is an independent risk factor for OS (hazard ratio [HR] 2.270; 95% confidence interval [CI], 1.398-3.686; p < 0.001) and PFS (HR 2.489; 95% CI, 1.323-4.684; p = 0.005). CONCLUSIONS High serum GGT level is an independent prognostic factor for OS and PFS in metastatic NSCLC patients.
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Affiliation(s)
- Yakup Bozkaya
- a Clinic of Medical Oncology , Edirne State Hospital , Edirne , Turkey
| | - Ozan Yazıcı
- b Department of Medical Oncology , Gazi University Faculty of Medicine , Ankara , Turkey
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Corti A, Belcastro E, Pompella A. Antitumoral effects of pharmacological ascorbate on gastric cancer cells: GLUT1 expression may not tell the whole story. Am J Cancer Res 2019; 8:6035-6037. [PMID: 30613280 PMCID: PMC6299431 DOI: 10.7150/thno.29864] [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: 09/11/2018] [Accepted: 10/10/2018] [Indexed: 11/05/2022] Open
Abstract
The recently reported results of Lu et al. (Theranostics. 2018; 8: 1312-26) - highlighting GLUT1 expression as a marker for sensitivity of gastric cancer cells to therapeutic doses of ascorbate - are discussed in the light of additional factors potentially affecting the underlying processes, such as the concomitant expression of membrane gamma-glutamyltransferase activity, the resistance of cancer cells to oxidative injury and other known biomarkers.
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Ultrasensitive detection of glutathione based on liquid crystals in the presence of γ-glutamyl transpeptidase. Anal Chim Acta 2018; 1040:187-195. [DOI: 10.1016/j.aca.2018.08.029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 08/08/2018] [Accepted: 08/13/2018] [Indexed: 01/20/2023]
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Arasteh S, Moohebati M, Avan A, Esmaeili H, Ghazizadeh H, Mahdizadeh A, Rahmani F, Mohamamdazade E, Ferns GA, Parizadeh MR, Ghayour-Mobarhan M. Serum level of gamma-glutamyl transferase as a biomarker for predicting stenosis severity in patients with coronary artery disease. Indian Heart J 2018; 70:788-792. [PMID: 30580846 PMCID: PMC6306306 DOI: 10.1016/j.ihj.2017.11.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 10/24/2017] [Accepted: 11/20/2017] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Gamma glutamyl transferase (GGT) is associated with pathogenesis of various diseases such as coronary artery disease (CAD). GGT activity displays an essential role in the catabolism of glutathione which is reported as a major antioxidant. The aim of this study was to explore the association of GGT activity with obstruction severity of artery in 500 CAD patients. RESULTS Our finding showed a significant association between serum GGT activity and CAD patients. In particular, the level of GGT in patients who had ≥50% obstruction was higher, compared to healthy and patients with less than 50% obstruction in their coronary arteries (the level of GGT in patients with at least one (1 SVD), two (2VD), three (3VD) coronary artery obstruction were 55.6±9.7, 71.7±12.7 and 84.7±13.4, while these values in patients with negative angio or control group were 28±10 and 17±4.6). Furthermore, the activity of this marker was associated with increased the risk of CAD (Odd ratio of GGT in 3VD group: 2, 95%CI: 1.8-2.3), which was also related with HDL-C. Of note, the level of GGT was enhanced progressively with increasing the obstruction severity of arteries. CONCLUSION We demonstrate the prognostic value of serum level of GGT as a biomarker for predicting obstruction severity in patients with CAD.
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Affiliation(s)
- Siavash Arasteh
- Metabolic Syndrome Research Center, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Clinical Biochemistry, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mohsen Moohebati
- Cardiovascular Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Amir Avan
- Metabolic Syndrome Research Center, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Modern Sciences and Technologies, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Habibollah Esmaeili
- Department of Biostatistics, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hamideh Ghazizadeh
- Metabolic Syndrome Research Center, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Modern Sciences and Technologies, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Adeleh Mahdizadeh
- Metabolic Syndrome Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Farzad Rahmani
- Department of Clinical Biochemistry, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Elham Mohamamdazade
- Metabolic Syndrome Research Center, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Gordon A Ferns
- Brighton & Sussex Medical School, Division of Medical Education, Falmer, Brighton, Sussex BN1 9PH, UK
| | - Mohammad Reza Parizadeh
- Metabolic Syndrome Research Center, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Clinical Biochemistry, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
| | - Majid Ghayour-Mobarhan
- Metabolic Syndrome Research Center, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Modern Sciences and Technologies, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
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Dominici S, Visvikis A, Pieri L, Paolicchi A, Valentini MA, Comporti M, Pompella A. Redox Modulation of NF-κB Nuclear Translocation and DNA Binding in Metastatic Melanoma. The Role of Endogenous and γ-Glutamyl Transferase-Dependent Oxidative Stress. TUMORI JOURNAL 2018; 89:426-33. [PMID: 14606649 DOI: 10.1177/030089160308900416] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Aims and background The transcription factor NF-κB is implicated in the expression of genes involved in cell proliferation, apoptosis and metastasis. In melanoma, high constitutive levels of NF-κB activation are usually observed. NF-κB is regulated by oxidation/reduction (redox) processes, and the occurrence of constitutive oxidative stress in melanoma cells has been documented. Recent studies of our laboratories showed that the membrane-bound gamma-glutamyl transferase (GGT) enzyme activity – expressed by a number of malignancies, including melanoma – can act as a basal source of superoxide, hydrogen peroxide and other prooxidants. Methods In the present study we utilized the 2/60 clone of Me665/2 human metastatic melanoma, which displays high levels of GGT activity, in order to verify if the presence of this enzyme - through the promotion of redox processes - may influence the activation status of NF-κB. The latter was evaluated by determining the nuclear translocation of the p65 subunit (by immunoblot), the DNA binding of NF-kB (by elec-trophoretic mobility shift assay) and its transcriptional activity (by gene transactivation studies). Results Me665/2/60 cells displayed a basal production of hydrogen peroxide. Stimulation of GGT activity by its substrates glutathione and glycyl-glycine caused additional production of hydrogen peroxide, up to levels approx. double the basal levels. Nuclear translocation of the NF-κB p65 subunit, DNA-binding and gene transactivation were thus investigated in Me665/2/60 cells whose GGT activity was modulated by means of substrates or inhibitors. Stimulation of GGT activity resulted in increased nuclear translocation of p65, while on the other hand NF-κB DNA binding and gene transactivation were paradoxically decreased. NF-κB DNA binding could be restored by treating cell lysates with the thiol-re-ducing agent dithiothreitol (DTT). Treatment of cells with exogenous hydrogen peroxide did not affect NF-κB activation status. Conclusions Altogether, the data obtained indicate that GGT activity may impair the redox status of thiols that is critical for NF-κB DNA binding and gene transactivation, through the production of prooxidant species allegedly distinct from hydrogen peroxide. GGT activity therefore appears to be an additional factor in modulation of NF-κB transcriptional activity in melanoma, capable of hindering NF-κB DNA binding even in conditions where continuous oxidative stress would favor NF-κB nuclear translocation.
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Affiliation(s)
- Silvia Dominici
- Department of Experimental Pathology, University of Pisa Medical School, Pisa, Italy
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Regulation of protein function by S-nitrosation and S-glutathionylation: processes and targets in cardiovascular pathophysiology. Biol Chem 2017; 398:1267-1293. [DOI: 10.1515/hsz-2017-0150] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 08/07/2017] [Indexed: 02/07/2023]
Abstract
AbstractDecades of chemical, biochemical and pathophysiological research have established the relevance of post-translational protein modifications induced by processes related to oxidative stress, with critical reflections on cellular signal transduction pathways. A great deal of the so-called ‘redox regulation’ of cell function is in fact mediated through reactions promoted by reactive oxygen and nitrogen species on more or less specific aminoacid residues in proteins, at various levels within the cell machinery. Modifications involving cysteine residues have received most attention, due to the critical roles they play in determining the structure/function correlates in proteins. The peculiar reactivity of these residues results in two major classes of modifications, with incorporation of NO moieties (S-nitrosation, leading to formation of proteinS-nitrosothiols) or binding of low molecular weight thiols (S-thionylation, i.e. in particularS-glutathionylation,S-cysteinylglycinylation andS-cysteinylation). A wide array of proteins have been thus analyzed in detail as far as their susceptibility to either modification or both, and the resulting functional changes have been described in a number of experimental settings. The present review aims to provide an update of available knowledge in the field, with a special focus on the respective (sometimes competing and antagonistic) roles played by proteinS-nitrosations andS-thionylations in biochemical and cellular processes specifically pertaining to pathogenesis of cardiovascular diseases.
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Zhu Y, Zhang AJ, Wu DB, Shen Z, Chen G, Shi YY, Wu H, Wang J. Prognostic significance of the pretreatment serum gamma-glutamyltransferase levels in Chinese patients with non-metastatic cervical cancer. Oncotarget 2017; 8:115701-115708. [PMID: 29383193 PMCID: PMC5777805 DOI: 10.18632/oncotarget.22273] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 09/18/2017] [Indexed: 11/25/2022] Open
Abstract
This study was performed to evaluate the prognostic significance of the pretreatment serum gamma-glutamyltransferase (GGT) levels in a Chinese cohort of patients with early-stage or locally advanced cervical cancer. The pretreatment serum GGT levels were examined in 290 cervical cancer patients with stage I-III disease and 230 healthy controls selected from a cancer-free population in the same region. Patients were assigned to normal or high-risk GGT groups, as previously described, and the GGT levels were correlated to clinicopathologic parameters and survival data. The GGT levels in cervical cancer patients were significantly higher than those in healthy controls (35.6 ± 29.1 vs. 24.1 ± 14.7 U/L, P < 0.001). In addition, the pretreatment serum GGT levels were associated with the histology type (P = 0.023), lymph node involvement (P = 0.040), stage (P = 0.029), recurrence (P = 0.015) and death (P = 0.005), but not with age (P = 0.432), tumor size (P = 0.067) or degree of differentiation (P = 0.901). Moreover, univariate survival analysis revealed that patients with high GGT levels tended to have poorer disease-free survival (DFS) [hazard ratio (HR), 1.721; 95% confidence interval (CI), 1.189–2.491; P = 0.004] and overall survival (OS) (HR, 1.929; 95% CI, 1.294–2.876; P = 0.001) compared to those with normal GGT levels. However, a multivariate Cox-regression model did not support these data (HR, 1.373; 95% CI, 0.925–2.039; P = 0.116 for DFS and HR, 1.357; 95% CI, 0.887–2.078; P = 0.160 for OS, respectively) after adjusting for other confounding variables. High pretreatment serum GGT was associated with more advanced tumor behavior, but could not serve as an independent prognostic indicator in patients with early-stage or locally advanced cervical cancer.
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Affiliation(s)
- Yi Zhu
- Department of Obstetrics and Gynecology, Anhui Provincial Hospital Affiliated Anhui Medical University, Hefei, Anhui, 230001, People's Republic of China
| | - Ai-Jun Zhang
- Department of Obstetrics and Gynecology, Anhui Provincial Hospital Affiliated Anhui Medical University, Hefei, Anhui, 230001, People's Republic of China
| | - Da-Bao Wu
- Department of Obstetrics and Gynecology, Anhui Provincial Hospital Affiliated Anhui Medical University, Hefei, Anhui, 230001, People's Republic of China
| | - Zhen Shen
- Department of Obstetrics and Gynecology, Anhui Provincial Hospital Affiliated Anhui Medical University, Hefei, Anhui, 230001, People's Republic of China
| | - Gang Chen
- Department of Obstetrics and Gynecology, Anhui Provincial Hospital Affiliated Anhui Medical University, Hefei, Anhui, 230001, People's Republic of China
| | - Yang-Yang Shi
- Department of Obstetrics and Gynecology, Anhui Provincial Hospital Affiliated Anhui Medical University, Hefei, Anhui, 230001, People's Republic of China
| | - Hao Wu
- Department of Obstetrics and Gynecology, Anhui Provincial Hospital Affiliated Anhui Medical University, Hefei, Anhui, 230001, People's Republic of China
| | - Jing Wang
- Department of Obstetrics and Gynecology, Anhui Provincial Hospital Affiliated Anhui Medical University, Hefei, Anhui, 230001, People's Republic of China
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Zhang C, Wang H, Ning Z, Xu L, Zhuang L, Wang P, Meng Z. Serum liver enzymes serve as prognostic factors in patients with intrahepatic cholangiocarcinoma. Onco Targets Ther 2017; 10:1441-1449. [PMID: 28331337 PMCID: PMC5348058 DOI: 10.2147/ott.s124161] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Objective Liver functions, reflective of the overall status of the host, have been reported to be important factors affecting the prognosis in many types of cancers. In this study, we explored the influences of liver enzymes albumin (ALB), globulin (GELO), total protein (TP), alkaline phosphatase (ALP), alanine aminotransferase (ALT), aspartate aminotransferase (AST), total bilirubin (TBIL), direct bilirubin (DBIL), gamma glutamyltranspeptidase (GGT), and lactate dehydrogenase (LDH) on the overall survival (OS) in a number of 173 patients with intrahepatic cholangiocarcinoma (ICC). Patients and methods Between 2011 and 2015, we enrolled patients with pathologically proven locally advanced or metastatic ICC. The impact of ALB, GELO, TP, ALP, ALT, AST, TBIL, DBIL, GGT, and LDH on OS were analyzed using Kaplan–Meier analysis. Next, the associations between these liver enzymes and OS were evaluated by univariate and multivariate analyses. Finally, the role of these enzymes in OS was evaluated in the subgroups. Results Elevated liver enzymes were linked with OS. We revealed that independent prognostic factors of poor outcome were ALP, TBIL, DBIL, and GGT, whereas ALB is a protective factor in ICC patients. Conclusion Our results demonstrate that these liver enzymes may serve as valuable predictive markers in ICC patients.
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Affiliation(s)
- Chenyue Zhang
- Department of Integrative Oncology, Fudan University Shanghai Cancer Center, Shanghai, People's Republic of China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
| | - Haiyong Wang
- Department of Integrative Oncology, Fudan University Shanghai Cancer Center, Shanghai, People's Republic of China; Department of Radiation Oncology, Shandong Cancer Hospita & Institute, Jinan, People's Republic of China
| | - Zhouyu Ning
- Department of Integrative Oncology, Fudan University Shanghai Cancer Center, Shanghai, People's Republic of China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
| | - Litao Xu
- Department of Integrative Oncology, Fudan University Shanghai Cancer Center, Shanghai, People's Republic of China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
| | - Liping Zhuang
- Department of Integrative Oncology, Fudan University Shanghai Cancer Center, Shanghai, People's Republic of China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
| | - Peng Wang
- Department of Integrative Oncology, Fudan University Shanghai Cancer Center, Shanghai, People's Republic of China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
| | - Zhiqiang Meng
- Department of Integrative Oncology, Fudan University Shanghai Cancer Center, Shanghai, People's Republic of China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, People's Republic of China
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Prognostic impact of pretherapeutic gamma-glutamyltransferase on patients with nasopharyngeal carcinoma. PLoS One 2017; 12:e0172345. [PMID: 28241022 PMCID: PMC5328260 DOI: 10.1371/journal.pone.0172345] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Accepted: 02/03/2017] [Indexed: 01/01/2023] Open
Abstract
Background Gamma-glutamyltransferase (GGT) is a membrane-bound enzyme involved in the metabolism of glutathione. Studies suggested that GGT played an important role in the tumor development, progression, invasion and drug resistance and prognosis. The association between GGT and prognosis of patients with nasopharyngeal carcinoma (NPC) was unknown. This study was conducted to investigate the association of pretherapeutic serum level of GGT with clinical-pathological parameters and survival in patients with NPC. Methods Two hundred and twenty-two patients with NPC were recruited in this study and were stratified into two GGT risk groups (≤ 34.5 U/L, > 34.5 U/L). The association of pretherapeutic serum GGT levels with clinical–pathological parameters was examined. Univariate and multivariate survival analyses were performed. Findings The pretherapeutic serum level of GGT was not associated with gender, age, pathology, T stage, N stage, TNM stage, chemotherapy or radiotherapy in patients with NPC. Patients in the high-risk GGT group had a poorer survival than the low-risk GGT group (3-year overall survival, 74.2% vs. 50.2%, P = 0.001; 3-year progression-free survival, 76.4% vs. 47.1%, P < 0.001; 3-year loco-regional relapse-free survival, 76.4% vs. 51.3%, P < 0.001; 3-year distant metastasis-free survival, 89.5% vs. 66.4%, P < 0.001). Multivariate analysis suggested that patients in the high-risk GGT group had 2.117 (95% confidence interval [CI], 1.225 ∼ 3.659, P = 0.007) times the risk of death, 2.836 (95% CI, 1.765 ∼ 4.557, P < 0.001) times the risk of progression, 2.551 (95% CI, 1.573 ∼ 4.138, P < 0.001) times the risk of relapse, and 3.331 (95% CI, 1.676 ∼ 6.622, P < 0.001) times the risk of metastasis compared with those in the low-risk GGT group. Conclusion The pretherapeutic serum level of GGT might serve as a novel independent prognostic factor for overall-survival, progression-free survival, loco-regional relapse-free survival and distant metastasis-free survival in patients with NPC.
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Abstract
Research over the past 30 years has identified mechanistic biochemical oxidation pathways that contribute to asthma pathophysiology. Redox imbalance is present in asthma and strongly linked to the pathobiology of airflow obstruction, airway hyperreactivity, and remodeling. High levels of reactive oxygen species, reactive nitrogen species, and oxidatively modified proteins in the lung, blood, and urine provide conclusive evidence for pathologic oxidation in asthma. Concurrent loss of antioxidants, such as superoxide dismutases and catalase, is attributed to redox modifications of the enzymes, and further amplifies the oxidative injury in the airway. The presence of high levels of urine bromotyrosine, an oxidation product of eosinophil peroxidase, identifies activated eosinophils, and shows promise for use as a noninvasive biomarker of poor asthma control.
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Kannan N, Sakthivel KM, Guruvayoorappan C. Anti-tumor and Chemoprotective Effect of Bauhinia tomentosa by Regulating Growth Factors and Inflammatory Mediators. Asian Pac J Cancer Prev 2016; 16:8119-26. [PMID: 26745048 DOI: 10.7314/apjcp.2015.16.18.8119] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Cancer is a leading cause of death worldwide. Due to the toxic side effects of the commonly used chemotherapeutic drug cyclophosphamide (CTX), the use of herbal medicines with fewer side effects but having potential use as inducing anti-cancer outcomes in situ has become increasingly popular. The present study sought to investigate the effects of a methanolic extract of Bauhinia tomentosa against Dalton's ascites lymphoma (DAL) induced ascites as well as solid tumors in BALB/c mice. Specifically, B. tomentosa extract was administered intraperitonealy (IP) at 10 mg/kg. BW body weight starting just after tumor cell implantation and thereafter for 10 consecutive days. In the ascites tumor model hosts, administration of extract resulted in a 52% increase in the life span. In solid tumor models, co-administration of extract and CTX significantly reduced tumor volume (relative to in untreated hosts) by 73% compared to just by 52% when the extract alone was provided. Co-administration of the extract also mitigated CTX-induced toxicity, including decreases in WBC count, and in bone marrow cellularity and α-esterase activity. Extract treatment also attenuated any increases in serum levels of TNFα, iNOS, IL-1β, IL-6, GM-CSF, and VEGF seen in tumor-bearing hosts. This study confirmed that, the potent antitumor activity of B.tomentosa extract may be associated with immune modulatory effects by regulating anti-oxidants and cytokine levels.
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Affiliation(s)
- Narayanan Kannan
- Department of Biotechnology, Karunya University, Coimbatore, India E-mail :
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Cappiello M, Spinelli M, Mormino M, Renzone G, Scaloni A, Moschini R, Balestri F, Mura U, Del-Corso A. Purification and characterization of a Cys-Gly hydrolase from the gastropod mollusk, Patella caerulea. J Enzyme Inhib Med Chem 2016; 31:1560-5. [PMID: 27541739 DOI: 10.3109/14756366.2016.1158170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
A magnesium-dependent cysteinyl-glycine hydrolyzing enzyme from the gastropod mollusk Patella caerulea was purified to electrophoretic homogeneity through a simple and rapid purification protocol. The molecular masses of the native protein and the subunit suggest that the enzyme has a homohexameric structure. Structural data in combination with kinetic parameters determined with Cys-Gly and compared with Leu-Gly as a substrate, indicate that the purified enzyme is a member of the peptidase family M17. The finding that an enzyme of the peptidase family M17 is responsible also in mollusks for the breakdown of Cys-Gly confirms the important role of this peptidase family in the glutathione metabolism.
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Affiliation(s)
- Mario Cappiello
- a Biology-Biochemistry Unit, University of Pisa , Pisa , Italy and
| | - Matteo Spinelli
- a Biology-Biochemistry Unit, University of Pisa , Pisa , Italy and
| | - Maurizio Mormino
- a Biology-Biochemistry Unit, University of Pisa , Pisa , Italy and
| | - Giovanni Renzone
- b ISPAAM-Proteomics & Mass Spectrometry Laboratory, National Research Council , Naples , Italy
| | - Andrea Scaloni
- b ISPAAM-Proteomics & Mass Spectrometry Laboratory, National Research Council , Naples , Italy
| | - Roberta Moschini
- a Biology-Biochemistry Unit, University of Pisa , Pisa , Italy and
| | | | - Umberto Mura
- a Biology-Biochemistry Unit, University of Pisa , Pisa , Italy and
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Li L, Shi W, Wu X, Gong Q, Li X, Ma H. Monitoring γ-glutamyl transpeptidase activity and evaluating its inhibitors by a water-soluble near-infrared fluorescent probe. Biosens Bioelectron 2016; 81:395-400. [DOI: 10.1016/j.bios.2016.03.021] [Citation(s) in RCA: 79] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 03/01/2016] [Accepted: 03/11/2016] [Indexed: 11/28/2022]
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Preyer O, Johansen D, Holly J, Stocks T, Pompella A, Nagel G, Concin H, Ulmer H, Concin N. γ-Glutamyltransferase and Breast Cancer Risk Beyond Alcohol Consumption and Other Life Style Factors - A Pooled Cohort Analysis. PLoS One 2016; 11:e0149122. [PMID: 26863311 PMCID: PMC4749274 DOI: 10.1371/journal.pone.0149122] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2015] [Accepted: 01/27/2016] [Indexed: 01/05/2023] Open
Abstract
Objective Elevated γ-Glutamyltransferase serum levels are associated with increased risk of overall cancer incidence and several site-specific malignancies. In the present prospective study we report on the associations of serum γ-Glutamyltransferase with the risk of breast cancer in a pooled population-based cohort considering established life style risk factors. Methods Two cohorts were included in the present study, i.e. the Vorarlberg (n = 97,268) and the Malmoe cohort (n = 9,790). Cox proportional hazards regression models were fitted to estimate HRs for risk of breast cancer. Results In multivariate analysis adjusted for age, body mass index and smoking status, women with γ-Glutamyltransferase levels in the top quartile were at significantly higher risk for breast cancer compared to women in the lowest quartile (HR 1.21, 95% CI 1.09 to 1.35; p = 0.005). In the subgroup analysis of the Malmoe cohort, γ-Glutamyltransferase remained an independent risk factor for breast cancer when additionally considering alcohol intake. A statistically significant increase in risk was seen in women with γ-Glutamyltransferase-levels in the top versus lowest quartile in a multivariate model adjusted for age, body mass index, smoking status, physical activity, parity, oral contraceptive-use and alcohol consumption (HR 1.37, 95% CI 1.11–1.69, p = 0.006). Conclusion Our findings identified γ-Glutamyltransferase as an independent risk factor for breast cancer beyond the consumption of alcohol and other life style risk factors.
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Affiliation(s)
- Oliver Preyer
- Agency for Preventive and Social Medicine, Bregenz, Vorarlberg, Austria
| | | | - Jessica Holly
- Department of Obstetrics and Gynaecology, Innsbruck Medical University, Innsbruck, Austria
| | - Tanja Stocks
- Lund University Diabetes Centre, Diabetes and Cardiovascular Disease—Genetic Epidemiology Department of Clinical Sciences Malmö, CRC, Malmoe, Sweden
| | - Alfonso Pompella
- Department of Experimental Pathology, University of Pisa, Medical School, Pisa, Italy
| | - Gabriele Nagel
- Agency for Preventive and Social Medicine, Bregenz, Vorarlberg, Austria
- Institute of Epidemiology and Medical Biometry, Ulm University, Ulm, Germany
| | - Hans Concin
- Agency for Preventive and Social Medicine, Bregenz, Vorarlberg, Austria
| | - Hanno Ulmer
- Department of Medical Statistics, Informatics and Health Economics, Innsbruck Medical University, Innsbruck, Austria
| | - Nicole Concin
- Department of Obstetrics and Gynaecology, Innsbruck Medical University, Innsbruck, Austria
- * E-mail:
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Wrotek S, Jędrzejewski T, Nowakowska A, Kozak W. Glutathione deficiency attenuates endotoxic fever in rats. Int J Hyperthermia 2015; 31:793-9. [DOI: 10.3109/02656736.2015.1067333] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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Yang F, Zhang S, Yang H, Luo K, Wen J, Hu Y, Hu R, Huang Q, Chen J, Fu J. Prognostic significance of gamma-glutamyltransferase in patients with resectable esophageal squamous cell carcinoma. Dis Esophagus 2015; 28:496-504. [PMID: 24766310 DOI: 10.1111/dote.12227] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Gamma-glutamyltransferase (GGT) is a membrane-bound enzyme involved in the glutathione metabolism. Studies suggested that GGT was a marker of apoptotic balance and modulated tumor progression, invasion and drug resistance. Recently, GGT was shown to be associated with the progression of high-grade esophageal epithelial dysplasia to invasive carcinoma. This study was conducted to investigate the value of pre-therapeutic serum GGT levels as prognostic parameter in esophageal squamous cell carcinoma. Six hundred thirty-nine resectable esophageal squamous cell carcinoma patients were recruited in this study and were stratified into two GGT risk groups. The association of pre-therapeutic serum GGT levels and clinical-pathological parameters was examined. Univariate and multivariate survival analyses were performed. GGT serum levels were associated with gender, smoking status, TNM stage and lymph node involvement. Higher pre-therapeutic serum GGT was found in males, smoker, advanced TNM stage and lymph node positive patients. Patients assigned to the low-risk group had higher 5-year overall survival rate (53.1% vs. 33.0%, P < 0.01) and disease-free survival rate (45.2% vs. 23.4%, P < 0.01) than the high-risk group. Patients with high-risk group of GGT had 1.568 (95% confidence interval [CI], 1.259 ∼ 1.952) times the risk of death and 1.582 (95% CI, 1.286 ∼ 1.946) times the risk of disease recurrence contrast with those with low-risk group of GGT. The pre-therapeutic serum GGT is a novel independent prognostic parameter for disease-free survival and overall survival in resectable esophageal squamous cell carcinoma.
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Affiliation(s)
- F Yang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Centre for Cancer Medicine, Sun Yat-Sen University Cancer Centre, Guangzhou, Guangdong, China.,Department of Thoracic Oncology, Sun Yat-Sen University Cancer Centre, Guangzhou, Guangdong, China.,Guangdong Esophageal Cancer Research Institute, Guangzhou, Guangdong, China
| | - S Zhang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Centre for Cancer Medicine, Sun Yat-Sen University Cancer Centre, Guangzhou, Guangdong, China.,Department of Thoracic Oncology, Sun Yat-Sen University Cancer Centre, Guangzhou, Guangdong, China.,Guangdong Esophageal Cancer Research Institute, Guangzhou, Guangdong, China
| | - H Yang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Centre for Cancer Medicine, Sun Yat-Sen University Cancer Centre, Guangzhou, Guangdong, China.,Department of Thoracic Oncology, Sun Yat-Sen University Cancer Centre, Guangzhou, Guangdong, China.,Guangdong Esophageal Cancer Research Institute, Guangzhou, Guangdong, China
| | - K Luo
- State Key Laboratory of Oncology in South China, Collaborative Innovation Centre for Cancer Medicine, Sun Yat-Sen University Cancer Centre, Guangzhou, Guangdong, China.,Department of Thoracic Oncology, Sun Yat-Sen University Cancer Centre, Guangzhou, Guangdong, China.,Guangdong Esophageal Cancer Research Institute, Guangzhou, Guangdong, China
| | - J Wen
- State Key Laboratory of Oncology in South China, Collaborative Innovation Centre for Cancer Medicine, Sun Yat-Sen University Cancer Centre, Guangzhou, Guangdong, China.,Department of Thoracic Oncology, Sun Yat-Sen University Cancer Centre, Guangzhou, Guangdong, China.,Guangdong Esophageal Cancer Research Institute, Guangzhou, Guangdong, China
| | - Y Hu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Centre for Cancer Medicine, Sun Yat-Sen University Cancer Centre, Guangzhou, Guangdong, China.,Department of Thoracic Oncology, Sun Yat-Sen University Cancer Centre, Guangzhou, Guangdong, China.,Guangdong Esophageal Cancer Research Institute, Guangzhou, Guangdong, China
| | - R Hu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Centre for Cancer Medicine, Sun Yat-Sen University Cancer Centre, Guangzhou, Guangdong, China.,Department of Thoracic Oncology, Sun Yat-Sen University Cancer Centre, Guangzhou, Guangdong, China.,Guangdong Esophageal Cancer Research Institute, Guangzhou, Guangdong, China
| | - Q Huang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Centre for Cancer Medicine, Sun Yat-Sen University Cancer Centre, Guangzhou, Guangdong, China.,Department of Thoracic Oncology, Sun Yat-Sen University Cancer Centre, Guangzhou, Guangdong, China.,Guangdong Esophageal Cancer Research Institute, Guangzhou, Guangdong, China
| | - J Chen
- State Key Laboratory of Oncology in South China, Collaborative Innovation Centre for Cancer Medicine, Sun Yat-Sen University Cancer Centre, Guangzhou, Guangdong, China.,Department of Thoracic Oncology, Sun Yat-Sen University Cancer Centre, Guangzhou, Guangdong, China.,Guangdong Esophageal Cancer Research Institute, Guangzhou, Guangdong, China
| | - J Fu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Centre for Cancer Medicine, Sun Yat-Sen University Cancer Centre, Guangzhou, Guangdong, China.,Department of Thoracic Oncology, Sun Yat-Sen University Cancer Centre, Guangzhou, Guangdong, China.,Guangdong Esophageal Cancer Research Institute, Guangzhou, Guangdong, China
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Abstract
The expression of gamma-glutamyl transpeptidase (GGT) is essential to maintaining cysteine levels in the body. GGT is a cell surface enzyme that hydrolyzes the gamma-glutamyl bond of extracellular reduced and oxidized glutathione, initiating their cleavage into glutamate, cysteine (cystine), and glycine. GGT is normally expressed on the apical surface of ducts and glands, salvaging the amino acids from glutathione in the ductal fluids. GGT in tumors is expressed over the entire cell membrane and provides tumors with access to additional cysteine and cystine from reduced and oxidized glutathione in the blood and interstitial fluid. Cysteine is rate-limiting for glutathione synthesis in cells under oxidative stress. The induction of GGT is observed in tumors with elevated levels of intracellular glutathione. Studies in models of hepatocarcinogenesis show that GGT expression in foci of preneoplastic hepatocytes provides a selective advantage to the cells during tumor promotion with agents that deplete intracellular glutathione. Similarly, expression of GGT in tumors enables cells to maintain elevated levels of intracellular glutathione and to rapidly replenish glutathione during treatment with prooxidant anticancer therapy. In the clinic, the expression of GGT in tumors is correlated with drug resistance. The inhibitors of GGT block GGT-positive tumors from accessing the cysteine in extracellular glutathione. They also inhibit GGT activity in the kidney, which results in the excretion of GSH in the urine and a rapid decrease in blood cysteine levels, leading to depletion of intracellular GSH in both GGT-positive and GGT-negative tumors. GGT inhibitors are being developed for clinical use to sensitize tumors to chemotherapy.
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Affiliation(s)
- Marie H Hanigan
- Department of Cell Biology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA.
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Zhang JX, Xiang GD, Xiang L, Dong J. Serum gamma-glutamyl transferase is associated with the elevated uric acid levels in normotensive Chinese adults. Clin Chim Acta 2014; 441:122-6. [PMID: 25545230 DOI: 10.1016/j.cca.2014.12.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 12/20/2014] [Accepted: 12/22/2014] [Indexed: 01/09/2023]
Abstract
BACKGROUND Although both serum gamma-glutamyltransferase (GGT) and uric acid are correlated with hypertension, studies on the association between serum GGT and uric acid in normotensive individuals are rare. In this study, we tried to reveal this relationship in normotensive Chinese adults. METHODS Four hundred seven normotensive adults were recruited. The subjects were divided into 3 subgroups according to serum GGT tertiles. Anthropometric parameters as well as systolic blood pressure (SBP), diastolic blood pressure (DBP), uric acid, GGT, alanine aminotransferase (ALT), aspartate aminotransferase (AST), blood glucose, blood lipids, and fasting insulin were measured. Insulin resistance was assessed using HOMA-IR index. RESULTS Uric acid was increased in parallel with increasing serum GGT (P<0.001). After correction for age, sex, smoking and alcohol consumption, serum GGT was positively associated with uric acid (r=0.42, P<0.001), SBP (r=0.22, P<0.001), and DBP (r=0.19, P<0.001). When compared with lowest GGT tertile, the odds ratio of the middle tertile for the increased serum uric acid was 3.43 (95% CI, 1.39-8.47) and 7.29 (95% CI, 1.57-33.82) for the highest tertile after adjustment for age, sex, BMI, smoking, alcohol consumption, SBP, DBP, creatinine and HOMA-IR. CONCLUSIONS Serum GGT is strongly associated with the increased uric acid concentrations in normotensive Chinese adults.
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Affiliation(s)
- Jun-Xia Zhang
- Department of Endocrinology, Wuhan General Hospital of Guangzhou Command, Wuhan, PR China.
| | - Guang-Da Xiang
- Department of Endocrinology, Wuhan General Hospital of Guangzhou Command, Wuhan, PR China
| | - Lin Xiang
- Department of Endocrinology, Wuhan General Hospital of Guangzhou Command, Wuhan, PR China
| | - Jing Dong
- Department of Endocrinology, Wuhan General Hospital of Guangzhou Command, Wuhan, PR China
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Huang CH, Chiou SH. Clinical proteomics identifies potential biomarkers in Helicobacter pylori for gastrointestinal diseases. World J Gastroenterol 2014; 20:1529-1536. [PMID: 24587628 PMCID: PMC3925861 DOI: 10.3748/wjg.v20.i6.1529] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2013] [Revised: 11/03/2013] [Accepted: 01/06/2014] [Indexed: 02/07/2023] Open
Abstract
The development of gastrointestinal diseases has been found to be associated with Helicobacter pylori (H. pylori) infection and various biochemical stresses in stomach and intestine. These stresses, such as oxidative, osmotic and acid stresses, may bring about bi-directional effects on both hosts and H. pylori, leading to changes of protein expression in their proteomes. Therefore, proteins differentially expressed in H. pylori under various stresses not only reflect gastrointestinal environment but also provide useful biomarkers for disease diagnosis and prognosis. In this regard, proteomic technology is an ideal tool to identify potential biomarkers as it can systematically monitor proteins and protein variation on a large scale of cell’s translational landscape, permitting in-depth analyses of host and pathogen interactions. By performing two-dimensional polyacrylamide gel electrophoresis (2-DE) followed by liquid chromatography-nanoESI-mass spectrometry (nanoLC-MS/MS), we have successfully pinpointed alkylhydroperoxide reductase (AhpC), neutrophil-activating protein and non-heme iron-binding ferritin as three prospective biomarkers showing up-regulation in H. pylori under oxidative, osmotic and acid stresses, respectively. Further biochemical characterization reveals that various environmental stresses can induce protein structure change and functional conversion in the identified biomarkers. Especially salient is the antioxidant enzyme AhpC, an abundant antioxidant protein present in H. pylori. It switches from a peroxide reductase of low-molecular-weight (LMW) oligomers to a molecular chaperone of high-molecular-weight (HMW) complexes under oxidative stress. Different seropositivy responses against LMW or HMW AhpC in H. pylori-infected patients faithfully match the disease progression from disease-free healthy persons to patients with gastric ulcer and cancer. These results has established AhpC of H. pylori as a promising diagnostic marker for gastrointestinal maladies, and highlight the utility of clinical proteomics for identifying disease biomarkers that can be uniquely applied to disease-oriented translational medicine.
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Association of gamma-glutamyltransferase with severity of disease at diagnosis and prognosis of ovarian cancer. Br J Cancer 2013; 109:610-4. [PMID: 23921280 PMCID: PMC3738124 DOI: 10.1038/bjc.2013.323] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2013] [Revised: 05/22/2013] [Accepted: 06/04/2013] [Indexed: 01/19/2023] Open
Abstract
Background: Gamma-glutamyltransferase (GGT) – a membrane-bound enzyme crucially involved in the cell's detoxification pathway and apoptotic balance – is involved in tumour development, progression and chemotherapy resistance. Elevated GGT serum levels are associated with increased cancer risk in women and worse prognosis in gynaecologic cancers. The present study investigated the prognostic role of GGT in ovarian cancer patients. Methods: In this multicenter study, pre-therapeutic GGT levels were ascertained in 634 consecutive patients with epithelial ovarian cancer (EOC, n=567) and borderline tumour of the ovary (BTO, n=67). Gamma-glutamyltransferase serum levels were associated with clinicopathological parameters and uni- and multivariate survival analyses were performed. Immunohistochemistry of GGT was performed in ovarian cancer tissue and correlated with GGT serum levels. Results: Pre-therapeutic GGT serum levels were higher in patients with EOC (28.56 (38.24) U l−1) than in patients with BTO (20.01 (12.78) U l−1, P=0.01). High GGT serum levels were associated with advanced FIGO stage (P<0.001) and with worse overall survival in univariate (P<0.001) and multivariable analysis (P=0.02, HR 1.2 (1.1–1.5)). We further investigated the association between systemic GGT serum levels and local GGT expression in EOC tumour tissue and observed an association between these two parameters (P=0.03). Conclusion: High pre-therapeutic GGT serum levels are associated with advanced tumour stage and serve as an independent prognostic marker for worse overall survival in patients with EOC. Gamma-glutamyltransferase expression in ovarian cancer tissue is reflected in GGT serum levels.
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Lacroix S, Egrise D, Van Simaeys G, Doumont G, Monclus M, Sherer F, Herbaux T, Leroy D, Goldman S. [18F]-FBEM, a tracer targeting cell-surface protein thiols for cell trafficking imaging. CONTRAST MEDIA & MOLECULAR IMAGING 2013; 8:409-16. [DOI: 10.1002/cmmi.1540] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 03/02/2013] [Accepted: 03/10/2013] [Indexed: 11/06/2022]
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Abstract
SIGNIFICANCE Oxidative stress is widely invoked in inflammation, aging, and complex diseases. To avoid unwanted oxidations, the redox environment of cellular compartments needs to be tightly controlled. The complementary action of oxidoreductases and of high concentrations of low-molecular-weight (LMW) nonprotein thiols plays an essential role in maintaining the redox potential of the cell in balance. RECENT ADVANCES While LMW thiols are central players in an extensive range of redox regulation/metabolism processes, not all organisms use the same thiol cofactors to this effect, as evidenced by the recent discovery of mycothiol (MSH) and bacillithiol (BSH) among different gram-positive bacteria. CRITICAL ISSUES LMW thiol-disulfide exchange processes and their cellular implications are often oversimplified, as only the biology of the free thiols and their symmetrical disulfides is considered. In bacteria under oxidative stress, especially where concentrations of different LMW thiols are comparable [e.g., BSH, coenzyme A (CoA), and cysteine (Cys) in many low-G+C gram-positive bacteria (Firmicutes)], mixed disulfides (e.g., CoASSB and CySSCoA) must surely be major thiol-redox metabolites that need to be taken into consideration. FUTURE DIRECTIONS There are many microorganisms whose LMW thiol-redox buffers have not yet been identified (either bioinformatically or experimentally). Many elements of BSH and MSH redox biochemistry remain to be explored. The fundamental biophysical properties, thiol pK(a) and redox potential, have not yet been determined, and the protein interactome in which the biothiols MSH and BSH are involved needs further exploration.
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Affiliation(s)
- Koen Van Laer
- Department of Structural Biology, Vlaams Instituut voor Biotechnologie (VIB), Brussels, Belgium
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Up-regulation of neutrophil activating protein in Helicobacter pylori under high-salt stress: structural and phylogenetic comparison with bacterial iron-binding ferritins. Biochimie 2013; 95:1136-45. [PMID: 23352965 DOI: 10.1016/j.biochi.2012.12.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2012] [Accepted: 12/30/2012] [Indexed: 02/08/2023]
Abstract
It is generally accepted that most gastrointestinal diseases are probably caused by the bacterial pathogen Helicobacter pylori (H. pylori). In this study we have focused on the comparison of protein expression profiles of H. pylori grown under normal and high-salt conditions by a proteomics approach. We have identified about 190 proteins whose expression levels changed after growth at high salt concentration. Among these proteins, neutrophil-activating protein (NapA) was found to be consistently up-regulated under osmotic stress brought by high salts. We have investigated the effect of high salt on secondary and tertiary structures of NapA by circular dichroism spectroscopy followed by analytical ultracentrifugation to monitor the change of quaternary structure of recombinant NapA with increasing salt concentration. The loss of iron-binding activity of NapA coupled with noticeable energetic variation in protein association of NapA as revealed by isothermal titration calorimetry was found under high salt condition. The phylogenetic tree analysis based on sequence comparison of 16 protein sequences encompassing NapA proteins and ferritin of H. pylori and other prokaryotic organisms pointed to the fact that all H. pylori NapA proteins of human origin are more homologous to NapA of Helicobacter genus than to other bacterial NapA. Based on computer modeling, NapA proteins from H. pylori of human isolates are found more similar to ferritin from H. pylori than to NapA from other species of bacteria. Taken together, these results suggested that divergent evolution of NapA and ferritin possessing dissimilar and diverse sequences follows a path distinct from that of convergent evolution of NapA and ferritin with similar dual functionality of iron-binding and ferroxidase activities.
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Castellano I, Merlino A. Gamma-Glutamyl Transpeptidases: Structure and Function. GAMMA-GLUTAMYL TRANSPEPTIDASES 2013. [DOI: 10.1007/978-3-0348-0682-4_1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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Yilmaz MI, Turgut F, Kanbay M, Saglam M, Sonmez A, Yaman H, Demirbas S, Unal HU, Gok M, Karaman M, Ay SA, Demirkaya E, Covic A, Carrero JJ. Serum gamma-glutamyltransferase levels are inversely related to endothelial function in chronic kidney disease. Int Urol Nephrol 2012; 45:1071-8. [PMID: 23242503 DOI: 10.1007/s11255-012-0354-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2012] [Accepted: 11/30/2012] [Indexed: 12/15/2022]
Abstract
BACKGROUNDS Gamma-glutamyltransferase (GGT) is an enzyme responsible for the extracellular catabolism of the antioxidant glutathione and recently implicated in the pathogenesis of atherosclerosis. Endothelial dysfunction is a prodromal feature of atherogenesis. Since oxidative stress is highly present in uremia and causally linked to endothelial dysfunction, we hypothesized that GGT may be a factor implicated in this process. METHODS Serum GGT and C-reactive protein (CRP) levels, estimated glomerular filtration rate (eGFR), and 24-h proteinuria were measured in 214 nondiabetic stages 3-5 CKD patients. The endothelium-dependent vasodilatation (FMD) of the brachial artery was assessed by using high-resolution ultrasound. We investigated the relationship between FMD and circulating serum GGT. RESULTS Serum GGT levels were negatively associated with FMD (r = -0.41, p < 0.001) and eGFR (r = -0.34, p < 0.001) in univariate analysis. Multivariate regression analysis showed that the association between GGT and FMD persisted after adjustment for age, sex, smoking, renal function (eGFR), inflammation (CRP), proteinuria, and homeostatic model assessment index. CONCLUSION Circulating GGT levels significantly associate with endothelial dysfunction, an important early feature of the atherogenic process. GGT might be an early marker of oxidative or other cellular stress that it is possibly directly related to the pathogenesis of endothelial dysfunction.
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Gamma-glutamyltransferase, H2O2-induced apoptosis and expression of catalase. Toxicol In Vitro 2012; 27:991. [PMID: 22995583 DOI: 10.1016/j.tiv.2012.09.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2012] [Accepted: 09/10/2012] [Indexed: 11/23/2022]
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Kwiecień I, Iciek M, Włodek L. Acceleration of anaerobic cysteine transformations to sulfane sulfur consequent to γ-glutamyl transpeptidase inhibition. ScientificWorldJournal 2012; 2012:253724. [PMID: 22629124 PMCID: PMC3353287 DOI: 10.1100/2012/253724] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Accepted: 12/27/2011] [Indexed: 11/25/2022] Open
Abstract
Toxicity of drugs and radiation in the cells is largely dependent on the level of thiols. In the present studies, an attempt has been made to inhibit γ-glutamyl transpeptidase (γGT) activity in EAT-bearing animals tissue. We have expected that administration of γGT inhibitors: acivicin and 1,2,3,4-tetrahydroisoquinoline (TIQ) may influence GSH/γ–glutamyl transpeptidase (γGT) system in the regulation of cysteine concentration and anaerobic cysteine metabolism in normal and cancer cells. Development of Ehrlich ascites tumor in mice enhances peroxidative processes, diminishes levels of nonprotein thiols (NPSH) and sulfane sulfur, and lowers activities of enzymes involved in its formation and transfer in the liver and kidney. Although γGT inhibitors further decrease NPSH level, they increase cysteine and sulfane sulfur levels. This means that upon γGT inhibition, cysteine can be efficiently acquired by normal liver and kidney cells via another pathway, that is so productive that sulfane sulfur level and intensity of anaerobic cysteine metabolism even rise.
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Affiliation(s)
- Inga Kwiecień
- Chair and Department of Pharmaceutical Botany, Medical College, Jagiellonian University, Medyczna 9, 30-688 Kraków, Poland
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Flahou B, Haesebrouck F, Chiers K, Van Deun K, De Smet L, Devreese B, Vandenberghe I, Favoreel H, Smet A, Pasmans F, D'Herde K, Ducatelle R. Gastric epithelial cell death caused by Helicobacter suis and Helicobacter pylori γ-glutamyl transpeptidase is mainly glutathione degradation-dependent. Cell Microbiol 2011; 13:1933-55. [DOI: 10.1111/j.1462-5822.2011.01682.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Xiong Y, Uys JD, Tew KD, Townsend DM. S-glutathionylation: from molecular mechanisms to health outcomes. Antioxid Redox Signal 2011; 15:233-70. [PMID: 21235352 PMCID: PMC3110090 DOI: 10.1089/ars.2010.3540] [Citation(s) in RCA: 220] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Redox homeostasis governs a number of critical cellular processes. In turn, imbalances in pathways that control oxidative and reductive conditions have been linked to a number of human disease pathologies, particularly those associated with aging. Reduced glutathione is the most prevalent biological thiol and plays a crucial role in maintaining a reduced intracellular environment. Exposure to reactive oxygen or nitrogen species is causatively linked to the disease pathologies associated with redox imbalance. In particular, reactive oxygen species can differentially oxidize certain cysteine residues in target proteins and the reversible process of S-glutathionylation may mitigate or mediate the damage. This post-translational modification adds a tripeptide and a net negative charge that can lead to distinct structural and functional changes in the target protein. Because it is reversible, S-glutathionylation has the potential to act as a biological switch and to be integral in a number of critical oxidative signaling events. The present review provides a comprehensive account of how the S-glutathionylation cycle influences protein structure/function and cellular regulatory events, and how these may impact on human diseases. By understanding the components of this cycle, there should be opportunities to intervene in stress- and aging-related pathologies, perhaps through prevention and diagnostic and therapeutic platforms.
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Affiliation(s)
- Ying Xiong
- Department of Pharmaceutical Sciences, Medical University of South Carolina, Charleston, 29425, USA
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Polterauer S, Hofstetter G, Grimm C, Rahhal J, Mailath-Pokorny M, Kohl M, Concin N, Tempfer C, Marth C, Reinthaller A. Relevance of gamma-glutamyltransferase--a marker for apoptotic balance--in predicting tumor stage and prognosis in cervical cancer. Gynecol Oncol 2011; 122:590-4. [PMID: 21664662 DOI: 10.1016/j.ygyno.2011.05.027] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Revised: 05/10/2011] [Accepted: 05/20/2011] [Indexed: 01/21/2023]
Abstract
INTRODUCTION Recent large epidemiologic population-based studies identified gamma-glutamyltransferase (GGT) as a marker for increased cervical cancer incidence. Furthermore, high levels of GGT seem to increase the risk of progression of high-grade cervical dysplasia to invasive carcinoma. Therefore, we evaluated the association between pre-therapeutic serum GGT levels, tumor stage and prognosis in patients with cervical cancer. MATERIALS AND METHODS In this multi-center trial, pre-therapeutic GGT levels were examined in 692 patients with cervical cancer. GGT levels were correlated with clinico-pathological parameters. Patients were assigned to previously described GGT risk groups and uni- and multivariable survival analyses were performed. RESULTS GGT serum levels were associated with FIGO stage (p<0.0001) and age (r=0.2, p<0.0001) but not with lymph node involvement (p=0.85), and histological type (p=0.98). High-risk GGT group affiliation (p=0.01 and p<0.0001) was associated with poor disease-free and overall survival in a univariate analysis, but not in a multivariable Cox-regression model (p=0.59 and p=0.171). We further investigated the association between prognosis and GGT and observed a linear correlation between GGT and prognosis. Therefore we were not able to identify a clear prognostic cut-off value for GGT in patients with cervical cancer. CONCLUSIONS High GGT--a marker for apoptosis and cervical cancer risk--is associated with advanced tumor stage in patients with cervical cancer.
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Affiliation(s)
- Stephan Polterauer
- Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA.
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Manolescu BN, Berteanu M, Oprea E, Chiriac N, Dumitru L, Vlădoiu S, Popa O, Ianăş O. Dynamic of oxidative and nitrosative stress markers during the convalescent period of stroke patients undergoing rehabilitation. Ann Clin Biochem 2011; 48:338-43. [DOI: 10.1258/acb.2011.010243] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Background Stroke patients have a redox imbalance, a consequence of both the cerebrovascular event and the associated pathological conditions. Our study was aimed to investigate the dynamic of some oxidative and nitrosative markers during the convalescent phase of postacute stroke patients undergoing rehabilitation. Methods We assessed thiol, advanced oxidation protein product, protein carbonyl, 3-nitro-l-tyrosine, ceruloplasmin and oxidized LDL concentrations, as well as gamma-glutamyltranspeptidase (GGT) activity in 20 patients at the beginning of the hospitalization and at the discharge moment, respectively, and 24 apparently healthy controls. Results We found significantly increased values for GGT ( P = 0.04), ceruloplasmin ( P = 0.01) and protein carbonyl ( P = 0.04) in stroke patients at the hospitalization moment when compared with healthy controls, while total thiols were significantly decreased ( P = 0.002). Rehabilitation was associated with a significant decrease of protein carbonyl ( P = 0.03) and oxidized LDL particle concentrations ( P = 0.03), as well as GGT activity ( P = 0.02). At the hospitalization moment, both GGT and ceruloplasmin were significantly negatively correlated with non-proteic thiols ( r = −0.44, P = 0.049, and r = −0.53, P = 0.015, respectively) and significantly positively with protein carbonyls ( r = +0.80, P < 0.001, and r = +0.69, P < 0.001, respectively) suggesting putative roles of GGT and ceruloplasmin in the redox imbalance. Conclusions These results highlight the existence of a redox imbalance in postacute stroke patients, and the possible benefits of an antioxidant-based therapy for the recovery of these patients.
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Affiliation(s)
| | - M Berteanu
- Department of Rehabilitation and Physical Medicine, University of Medicine and Pharmacy ‘Carol Davila’, 020022 Bucharest
- Department of Rehabilitation and Physical Medicine, Universitary Emergency Hospital Elias, 011461 Bucharest
| | - E Oprea
- Department of Organic Chemistry, Faculty of Chemistry, University of Bucharest, 030018 Bucharest
| | - N Chiriac
- Department of Research and Evaluation in Health Services, National School of Public Health, Management and Continuous Medical Education, 021253 Bucharest
| | - L Dumitru
- Department of Rehabilitation and Physical Medicine, University of Medicine and Pharmacy ‘Carol Davila’, 020022 Bucharest
- Department of Rehabilitation and Physical Medicine, Universitary Emergency Hospital Elias, 011461 Bucharest
| | - S Vlădoiu
- National Institute of Endocrinology ‘C.I. Parhon’, 011863 Bucharest, Romania
| | - O Popa
- National Institute of Endocrinology ‘C.I. Parhon’, 011863 Bucharest, Romania
| | - O Ianăş
- National Institute of Endocrinology ‘C.I. Parhon’, 011863 Bucharest, Romania
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Asare GA, Sittie A, Bugyei K, Gyan BA, Adjei S, Addo P, Wiredu EK, Nyarko AK, Otu-Nyarko LS, Adjei DN. Acute toxicity studies of Croton membranaceus root extract. JOURNAL OF ETHNOPHARMACOLOGY 2011; 134:938-943. [PMID: 21335084 DOI: 10.1016/j.jep.2011.02.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2010] [Revised: 01/25/2011] [Accepted: 02/09/2011] [Indexed: 05/30/2023]
Abstract
AIM OF THE STUDY Croton membranaceus root and leaf extracts are used in the Bahamas to aromatize tobacco, in Nigeria to improve digestion, and in Ghana, for benign prostate hyperplasia. Despite claims of success there is paucity of information on its toxicity. The aim of this study was to determine if Croton membranaceus has acute toxicity properties. MATERIALS AND METHODS Roots were air-dried in a solar dryer for one week before milling. The powder was extracted with 96% ethanol, freeze-dried and re-extracted with distilled water and freeze-dried. 15 male Sprague-Dawley rats (180-200 g) were divided equally into 2 treatment groups [low dose (LD) and high dose (HD)], plus a control group (C). LD and HD received 1500 and 3000 mg/kg b.wt. Croton membranaceus aqueous extract, respectively, one time and observed for 14 days. Haematological [Full Blood Count and haemoglobin (Hb)], biochemical [bilirubin, alanine aminotransferase (ALA), aspartate aminotransferase (AST), total protein, albumin, globulin, alkaline phosphatise (ALP), γ-glutamyltranspetidase (GGT), urea, creatinine, creatinine kinase - Muscle and Brain (CK-MB), creatinine kinase - Total (CK-R)] examinations were performed. RESULTS Control group's CK-MB (5444±534 U/L) and LD group CK-MB (4014±1016 U/L) were significantly different (p<0.05). Control and the HD group CK-MB (3955±1135 U/L) were significantly different (p<0.05). Both LD and HD CK-R levels (697±197U/L and 732±203 U/L, respectively), were lower than the control (1139±220 U/L) at 48 h and 14 days (p<0.05, p<0.05, respectively). γ-GT levels of the HD group was 4.8±0.4 U/L compared to the Control group value of 0.9±0.2 U/L (p<0.05). CONCLUSIONS Taking all factors into consideration, Croton membranaceus ingestion does not produce general acute toxicity. However, its creatinine kinase lowering ability could be explored.
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Affiliation(s)
- George A Asare
- University of Ghana School of Allied Health Sciences (SAHS), Korle Bu, Ghana.
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Cheung BMY, Ong KL, Tso AWK, Cherny SS, Sham PC, Lam TH, Lam KSL. Gamma-glutamyl transferase level predicts the development of hypertension in Hong Kong Chinese. Clin Chim Acta 2011; 412:1326-31. [PMID: 21466796 DOI: 10.1016/j.cca.2011.03.030] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2011] [Revised: 03/28/2011] [Accepted: 03/28/2011] [Indexed: 11/25/2022]
Abstract
BACKGROUND Plasma activities of alkaline phosphatase, alanine aminotransferase (ALT), aspartate aminotransferase, and γ-glutamyl transferase (GGT) are often increased in cardiometabolic diseases. We investigated if hypertension is associated with increased activities of these plasma markers. METHODS We included 235 hypertensive and 708 normotensive subjects (mean age 47.3±9.6 and 58.0±10.2 years respectively) from the Hong Kong Cardiovascular Risk Factor Prevalence Study-2 (CRISPS-2) in 2000-2004 who had drank <1/week. In the follow-up study in 2005-2008 (CRISPS-3), 126 out of the 708 subjects had developed hypertension. RESULTS Raised plasma ALT (OR=1.22 per SD of log-transformed level, P=0.045) and GGT (OR=1.38 per SD of log-transformed level, P=0.001) levels were associated with hypertension at baseline in CRISPS-2 after adjusting for covariates. Among subjects not on anti-hypertensive medications, plasma ALP, ALT and GGT were related to blood pressure (P<0.01). In subjects normotensive at CRISPS-2, plasma GGT, but not ALP, ALT and AST, was an independent predictor of new-onset hypertension at CRISPS-3 (OR=1.38 per SD of log-transformed level, P=0.020 and OR=2.68 for 3rd tertile vs. 1st tertile, P=0.004) after adjusting for covariates. CONCLUSIONS Among the 4 plasma markers, increased GGT activity is the strongest predictor for existing and new-onset hypertension in Hong Kong Chinese.
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Affiliation(s)
- Bernard M Y Cheung
- Department of Medicine, University of Hong Kong, Hong Kong; Research Centre of Heart, Brain, Hormone and Healthy Aging, University of Hong Kong, Hong Kong.
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Grek CL, Townsend DM, Tew KD. The impact of redox and thiol status on the bone marrow: Pharmacological intervention strategies. Pharmacol Ther 2010; 129:172-84. [PMID: 20951732 DOI: 10.1016/j.pharmthera.2010.09.008] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2010] [Accepted: 09/14/2010] [Indexed: 10/18/2022]
Abstract
Imbalances in cancer cell redox homeostasis provide a platform for new opportunities in the development of anticancer drugs. The control of severe dose-limiting toxicities associated with redox regulation, including myelosuppression and immunosuppression, remains a challenge. Recent evidence implicates a critical role for redox regulation and thiol balance in pathways that control myeloproliferation, hematopoietic progenitor cell mobilization, and immune response. Hematopoietic stem cell (HSC) self-renewal and differentiation are dependent upon levels of intracellular reactive oxygen species (ROS) and niche microenvironments. Redox status and the equilibrium of free thiol:disulfide couples are important in modulating immune response and lymphocyte activation, proliferation and differentiation. This subject matter is the focus of the present review. The potential of redox modulating chemotherapeutics as myeloproliferative and immunomodulatory agents is also covered.
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Affiliation(s)
- Christina L Grek
- Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Medical University of South Carolina, Charleston, SC 29425, USA
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Acikgoz N, Ermiş N, Yağmur J, Cansel M, Karincaoğlu Y, Ataş H, Cuglan B, Barutcu İ, Pekdemir H, Özdemir R. Elevated Oxidative Stress Markers and its Relationship With Endothelial Dysfunction in Behçet Disease. Angiology 2010; 62:296-300. [DOI: 10.1177/0003319710382417] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Behçet’s disease (BD) is a multisystemic disorder characterized by endothelial dysfunction. However, the relationship between oxidative stress and endothelial function has not been clearly shown. We investigated the relationship between oxidative stress markers and endothelial function in patients with BD. Patients with BD (n = 40) having active disease and sex- and age-matched 40 controls were included. Endothelial function was assessed by flow-mediated dilatation (FMD) technique. Serum gamma-glutamyltransferase (GGT) and high-sensitive C-reactive protein levels (hsCRP) were measured in all participants. Brachial artery FMD was significantly lower in patients with BD than in controls. Gamma-glutamyltransferase and hsCRP levels were higher in patients with BD than in controls. Also, GGT and hsCRP levels were inversely correlated with endothelial function. Oxidative stress markers are elevated in patients with BD having active disease. This may be one of the reasons behind the vasculitis in active BD.
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Affiliation(s)
- Nusret Acikgoz
- Department of Cardiology, Faculty of Medicine, Inonu University, Malatya, Turkey
| | - Necip Ermiş
- Department of Cardiology, Faculty of Medicine, Inonu University, Malatya, Turkey
| | - Jülide Yağmur
- Department of Cardiology, Faculty of Medicine, Inonu University, Malatya, Turkey
| | - Mehmet Cansel
- Department of Cardiology, Faculty of Medicine, Inonu University, Malatya, Turkey
| | - Yelda Karincaoğlu
- Department of Dermatology, Faculty of Medicine, Inonu University, Malatya, Turkey
| | - Halil Ataş
- Department of Cardiology, Faculty of Medicine, Inonu University, Malatya, Turkey
| | - Bilal Cuglan
- Department of Cardiology, Faculty of Medicine, Inonu University, Malatya, Turkey
| | - İrfan Barutcu
- Department of Cardiology, Avicenna Hospital, İstanbul, Turkey,
| | - Hasan Pekdemir
- Department of Cardiology, Faculty of Medicine, Inonu University, Malatya, Turkey
| | - Ramazan Özdemir
- Department of Cardiology, Faculty of Medicine, Inonu University, Malatya, Turkey
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Abstract
Extracellular redox (reduction-oxidation) state is a factor that serves as an important regulator of cell-microenvironmental interactions and is determined by several known variables; including redox-modulating proteins that are located on the plasma membrane or outside of cells, extracellular thiol/disulfide couples, and reactive oxygen species (ROS)/reactive nitrogen species (RNS) that are capable of traveling across plasma membranes into the extracellular space. The extracellular redox state works in concert with the intracellular redox state to control both the influx and efflux of ROS/RNS that may serve to modulate redox signaling or to perturb normal cellular processes or both. Under physiologic conditions, the extracellular space is known to have a relatively more-oxidized redox state than the interior of the cell. During pathologic conditions, such as cancer, the extracellular redox state may be altered, causing specific proteins such as proteases, soluble factors, or the extracellular matrix to have altered functions or activities. Recent studies have strongly supported an important relation between the extracellular redox state and cancer cell aggressiveness. The purpose of this review is to identify redox buffer networks in extracellular spaces and to emphasize the possible roles of the extracellular redox state in cancer, knowledge that may contribute to potential therapeutic interventions.
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Affiliation(s)
- Luksana Chaiswing
- Department of Pathology and Laboratory Medicine, University of Wisconsin School of Medicine and Public Health, Madison,Wisconsin, USA
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Gong M, Ling SSM, Lui SY, Yeoh KG, Ho B. Helicobacter pylori gamma-glutamyl transpeptidase is a pathogenic factor in the development of peptic ulcer disease. Gastroenterology 2010; 139:564-73. [PMID: 20347814 DOI: 10.1053/j.gastro.2010.03.050] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2008] [Revised: 02/03/2010] [Accepted: 03/11/2010] [Indexed: 12/14/2022]
Abstract
BACKGROUND & AIMS gamma-Glutamyl transpeptidase (GGT) has been reported to be a virulence factor of Helicobacter pylori associated with bacterial colonization and cell apoptosis. But its mechanism of pathogenesis is not firmly established. This study aims to examine its role in H pylori-mediated infection. METHODS Various H pylori isogenic mutants were constructed by a polymerase chain reaction (PCR) approach. H pylori native GGT protein (HP-nGGT) was purified with ion-exchange and gel-filtration chromatography. Generation of H2O2 was measured with fluorimetric analysis, whereas nuclear factor-kappaB (NF-kappaB) activation was determined by luciferase assay and Western blot. Cytokine production was examined by enzyme-linked immunoabsorbent assay and real-time PCR. DNA damage was assessed with comet assay and flow cytometry. The GGT activity of 98 H pylori isolates was analyzed by an enzymatic assay. RESULTS Purified HP-nGGT generated H2O2 in primary gastric epithelial cells and AGS gastric cancer cells, resulting in the activation of NF-kappaB and up-regulation of interleukin-8 (IL-8) production. In addition, HP-nGGT caused an increase in the level of 8-OH-dG, indicative of oxidative DNA damage. In contrast, Deltaggt showed significantly reduced levels of H2O2 generation, IL-8 production, and DNA damage in cells compared with the wild type (P<.05). The clinical importance of GGT was indicated by significantly higher (P<.001) activity in H pylori isolates obtained from patients with peptic ulcer disease (n=54) than isolates from patients with nonulcer dyspepsia (n=44). CONCLUSION Our findings provide evidence that GGT is a pathogenic factor associated with H pylori-induced peptic ulcer disease.
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Affiliation(s)
- Min Gong
- Department of Microbiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
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