Helicobacter pylori(H.pylori)produce an enzyme known asγ-glutamyl transpeptidase(HpGGT)that is highly conserved and common to all strains.HpGGT has been gaining increasing attention as an important virulence factor o...Helicobacter pylori(H.pylori)produce an enzyme known asγ-glutamyl transpeptidase(HpGGT)that is highly conserved and common to all strains.HpGGT has been gaining increasing attention as an important virulence factor of the bacterium,having been demonstrated to be an important colonization factor in several animal models and has also recently been strongly associated with the development of peptic ulcer disease.From the results of various independent researcher groups,it is clear that HpGGT acts through several pathways to damage gastric epithelial cells including the induction of apoptosis and cell cycle arrest,production of reactive oxygen species leading to DNA damage,promotion of inflammation by increasing cyclooxygenase-2 and interleukin-8 expression,and upregulation of heparin-binding epidermal growth factor-like growth factor resulting in cell survival and proliferation.In addition,the potential role of HpGGT in promoting gastric carcinogenesis will also be discussed in this review.Apart from affecting the gastric epithelium,HpGGT also has immunomodulatory actions on host immune cells where it displays an antiproliferative effect on T cells by inducing cell cycle arrest and also works with other H.pylori virulence factors to skew dendritic cells towards a tolerogenic phenotype,possibly contributing to the persistence of the pathogen in the gastric mucosa.展开更多
Helicobacter pylori(H.pylori)gamma-glutamyl transpeptidase(GGT)is a bacterial virulence factor that converts glutamine into glutamate and ammonia,and converts glutathione into glutamate and cysteinylglycine.H.pylori G...Helicobacter pylori(H.pylori)gamma-glutamyl transpeptidase(GGT)is a bacterial virulence factor that converts glutamine into glutamate and ammonia,and converts glutathione into glutamate and cysteinylglycine.H.pylori GGT causes glutamine and glutathione consumption in the host cells,ammonia production and reactive oxygen species generation.These products induce cell-cycle arrest,apoptosis,and necrosis in gastric epithelial cells.H.pylori GGT may also inhibit apoptosis and induce gastric epithelial cell proliferation through the induction of cyclooxygenase-2,epidermal growth factor-related peptides,inducible nitric oxide synthase and interleukin-8.H.pylori GGT induces immune tolerance through the inhibition of T cell-mediated immunity and dendritic cell differentiation.The effect of GGT on H.pylori colonization and gastric persistence are also discussed.展开更多
Objective We aim to explore the potential association between serum gamma-glutamyl transferase levels and functional outcome after aneurysmal subarachnoid hemorrhage in a Chinese population. Methods A total of 386 ane...Objective We aim to explore the potential association between serum gamma-glutamyl transferase levels and functional outcome after aneurysmal subarachnoid hemorrhage in a Chinese population. Methods A total of 386 aneurysmal subarachnoid hemorrhage patients were included in the study from September 2007 to February 2015. Baseline serum gamma-glutamyl transferase levels and 6-month follow-up functional outcomes were determined. A poor outcome was defined as a modified ranking scale score of ≥ 3. The multivariable logistic model was used to analyze the relationship between serum gamma-glutamyl transferase and clinical outcomes after aneurysmal subarachnoid hemorrhage. Results The adjusted poor outcome rates of patients with gamma-glutamyl transferase levels of 〈 30 U/L, 30-50 U/L and ≥ 50 U/L were 16.7%, 19.6%, and 34.4%, respectively (P 〈 0.01). The age-sex and multivariable adjusted odds ratios (95% confidence intervals) of poor prognosis comparing the top group (≥ 50 U/L) with the lowest group (〈 30 U/L) were 5.76 (2.74-12.13), 6.64 (2.05-21.52), and 6.36 (1.92-21.02). A significant linear trend existed between gamma-glutamyl transferase level and aneurysmal subarachnoid hemorrhage prognosis. This association was also observed among nondrinkers. Conclusion Patients with higher gamma-glutamyl transferase levels were more likely to have a poor prognosis. Serum gamma-glutamyl transferase can be considered to be an independent predictor of functional outcomes after aneurysmal subarachnoid hemorrhage.展开更多
AIM:To investigate the association of serum gammaglutamyl transferase(GGT) levels with chronic hepatitis B infection and hepatitis B e antigen(HBe Ag) seroconversion.METHODS:A retrospective study was performed on clin...AIM:To investigate the association of serum gammaglutamyl transferase(GGT) levels with chronic hepatitis B infection and hepatitis B e antigen(HBe Ag) seroconversion.METHODS:A retrospective study was performed on clinical data collected from patients who had been positive for hepatitis B surface antigen for > 6 mo and who were antiviral-treatment na?ve(n = 215) attending the Hepatitis Clinic at Nanjing Drum Tower Hospital between August 2010 and December 2013. Healthy individuals without liver disease(n = 83) were included as controls. Patients were categorized into four groups based on disease status as recommended by the European Association for the Study of the Liver:immune tolerance(IT; n = 47),HBe Ag-positive hepatitis(EPH; n = 93),HBe Ag-negative hepatitis(ENH;n = 20),and inactive carrier(IC; n = 55). Prediction of complete response(CR) based on serum GGT was also examined in EPH patients(n = 33) treated for 48 wk with nucleos(t)ide analogue(NA) therapy,including lamivudine plus adefovir combination therapy(n = 20) or entecavir monotherapy(n = 13). CR was defined as a serum hepatitis B virus DNA level < 500 copies/m L and HBe Ag seroconversion by 48 wk of treatment. RESULTS:Serum GGT levels were significantly increased in EPH and ENH patients relative to the IT,IC,and healthy control groups(P < 0.01 for all). However,no significant difference in serum GGT levels was found between the EPH and ENH groups. Baseline serum GGT levels were significantly higher in patients who achieved CR(7/33; 21.2%) compared to patients in the non-CR group(26/33; 78.8%; P = 0.011). In addition,the decline in serum GGT was greater in CR patients compared to non-CR patients after 24 wk and 48 wk of treatment(P = 0.012 and P = 0.008,respectively). The receiver operating characteristic curve yielded a sensitivity of 85.71% and a specificity of 61.54% at a threshold value of 0.89 times the upper limit of normal for baseline serum GGT in the prediction of CR following NA therapy. CONCLUSION:Serum GGT is significantly elevated in EPH and ENH patients and is a potential biomarker for the prediction of HBe Ag seroconversion following NA therapy.展开更多
BACKGROUND There is increasing interest in transplanting patients with hepatocellularcarcinoma (HCC) with tumors greater than 5 cm (Milan criteria).AIM To investigate possible prognostically-useful factors for liver t...BACKGROUND There is increasing interest in transplanting patients with hepatocellularcarcinoma (HCC) with tumors greater than 5 cm (Milan criteria).AIM To investigate possible prognostically-useful factors for liver transplantation inHCC patients with large tumors.METHODS In this clinical study, 50 patients with HCC who were transplanted at our LiverTransplant Center between April 2006 and August 2019 and had tumors greaterthan 6 cm maximum diameter were retrospectively analyzed. Their survival andfull clinical characteristics were examined, with respect to serum alphafetoprotein(AFP) and gamma glutamyl transpeptidase (GGT) levels. Kaplan-Meier survival estimates were used to determine overall survival and disease-freesurvival in these patients. The inclusion criterion was evidence of HCC. Exclusioncriteria were the presence of macroscopic portal vein thrombosis or metastasisand a follow-up period of less than 90 d.RESULTS Using receiver operating characteristic curve (ROC) analysis, cutoff values of AFP200 ng/mL and GGT 104 IU/L were identified and used in this study.Significantly longer overall survival (OS) and disease-free-survival (DFS) were found in patients who had lower values of either parameter, compared withhigher values. Even greater differences in survival were found when the 2parameters were combined. Two tumor size bands were identified, in searchingfor the limits of this approach with larger tumors, namely 6-10 cm and > 10 cm.Combination parameters in the 6-10 cm band reflected 5-year OS of 76.2% inpatients with low AFP plus low GGT vs 0% for all other groups. Patients withtumors greater than 10 cm, did not have low AFP plus low GGT. The mostconsistent clinical correlates for longer survival were degree of tumordifferentiation and absence of microscopic portal venous invasion.CONCLUSION Serum levels of AFP and GGT, both alone and combined, represent a simpleprognostic identifier in patients with large HCCs undergoing liver transplantation.展开更多
·AIM:To investigate the independent pathogenic role of high serum gamma-glutamyl transferase (GGT) levels, sociodemographic data, dietary and environmental risk factors for visual disability (VD). ·METHODS:T...·AIM:To investigate the independent pathogenic role of high serum gamma-glutamyl transferase (GGT) levels, sociodemographic data, dietary and environmental risk factors for visual disability (VD). ·METHODS:This was a case-control study, run in 200 black Congolese patients managed in Saint Joseph Hospital Ophthalmology Division from Kinshasa town. Logistic regression model was used to identify determinants of VD (n = 58) among sex, age, cigarette smoking, alcohol abuse, rural-urban migration, education levels, aging ≥60 years, intake of red Beans, Safou fruit and Taro leaves, lipid profile, residence, socioeconomic status, and GGT. ·RESULTS:After adjusting for confounding factors, we identified migration (OR=3.7 95% CI:1.2-11.3; P =0.023), low education level (OR=3.1 95% CI 1.1-8.5; P =0.026), no intake of Safou fruit (OR=34.2 95% CI 11.5-102; P < 0.0001), age ≥60 years (OR=2.5 95% CI 1.01-6.5; P = 0.049), and serum GGT ≥10U/L (OR=3.6 95% CI 1.3-9.6; P = 0.012) as the significant and independent determinants of VD. ·CONCLUSION:VD appears as a major public health problem in Central Africa to be prevented or delayed by control of migration, lifestyle changes, antioxidant supplements, appropriate diet, nutrition education, and blocking of oxidative stress.展开更多
BACKGROUND Gamma-glutamyl transferase(GGT)is associated with the risk of cardiovascular disease(CVD)in the general population.AIM To identify the association of baseline GGT level and QRISK2 score among patients with ...BACKGROUND Gamma-glutamyl transferase(GGT)is associated with the risk of cardiovascular disease(CVD)in the general population.AIM To identify the association of baseline GGT level and QRISK2 score among patients with biopsy-proven nonalcoholic fatty liver disease(NAFLD).METHODS This was a retrospective study involving 1535 biopsy-proven NAFLD patients from 10 Asian centers in 8 countries using data collected by the Gut and Obesity in Asia(referred to as“GO ASIA”)workgroup.All patients with available baseline GGT levels and all 16 variables for the QRISK2 calculation(QRISK2-2017;developed by researchers at the United Kingdom National Health Service;https://qrisk.org/2017/;10-year cardiovascular risk estimation)were included and compared to healthy controls with the same age,sex,and ethnicity.Relative risk was reported.QRISK2 score>10%was defined as the high-CVD-risk group.Fibrosis stages 3 and 4(F3 and F4)were considered advanced fibrosis.RESULTS A total of 1122 patients(73%)had complete data and were included in the final analysis;314(28%)had advanced fibrosis.The median age(interquartile range[IQR])of the study population was 53(44-60)years,532(47.4%)were females,and 492(43.9%)were of Chinese ethnicity.The median 10-year CVD risk(IQR)was 5.9%(2.6-10.9),and the median relative risk of CVD over 10 years(IQR)was 1.65(1.13-2.2)compared to healthy individuals with the same age,sex,and ethnicity.The high-CVD-risk group was significantly older than the low-risk group(median[IQR]:63[59-67]vs 49[41-55]years;P<0.001).Higher fibrosis stages in biopsy-proven NAFLD patients brought a significantly higher CVD risk(P<0.001).Median GGT level was not different between the two groups(GGT[U/L]:Median[IQR],high risk 60[37-113]vs low risk 66[38-103],P=0.56).There was no correlation between baseline GGT level and 10-year CVD risk based on the QRISK2 score(r=0.02).CONCLUSION The CVD risk of NAFLD patients is higher than that of healthy individuals.Baseline GGT level cannot predict CVD risk in NAFLD patients.However,advanced fibrosis is a predictor of a high CVD risk.展开更多
To investigate the exon mutation of vitamin K-dependent gamma-glutamyl carboxylase (GGCX or VKDC) in patients with calcium oxalate urolithasis, renal cortex and peripheral blood samples were obtained from severe hyd...To investigate the exon mutation of vitamin K-dependent gamma-glutamyl carboxylase (GGCX or VKDC) in patients with calcium oxalate urolithasis, renal cortex and peripheral blood samples were obtained from severe hydronephrosis patients (with or without calculi), and renal tumor patients undergoing nephrectomy. GGCX mutations in all 15 exons were examined in 44 patients with calcium oxalate urolithiasis (COU) by polymerase chain reaction (PCR) and denatured high pressure liquid chromatography (DHPLC), and confirmed by sequencing. Mutation was not found in all COU samples compared to the controls. These data demonstrated that functional GGCX mutations in all 15 exons do not occur in most COU patients. It was suggested that there may be no significant association between the low activity and mutation of GGCX in COU.展开更多
Cancer chemoprevention, a desirable and important facet of biomedical research, provides a practical approach to identify potentially useful inhibitors of cancer development, and offers an opporiunity to study the me...Cancer chemoprevention, a desirable and important facet of biomedical research, provides a practical approach to identify potentially useful inhibitors of cancer development, and offers an opporiunity to study the mechanism of carcinogenesis. During the recent Past a number of compounds have been tested for their anticarcinogenic potential specially constituents of our diet. The enzyme γglutamyl transpeptidase (GGT) which catalyses the transfer of glutamyl groups of peptides to other peptides and amino acid and has been proposed as a marker of cell proliferation and neoplasia. It also serves as a tool to evaluate the carcinogenic and cocarcinogenic potential of environmental toxicants. In the present investigations, CGT activity induced by careinogenic polycyclic aromatic hydmiarbons, viz. 7, 12-dimethylbenz(a) anthracene (DMBA) and benzo(a) pyrene (BaP) was significantly inhibited by diallylsulfide (DAS) and indole-3-carbnol (I3C) in mouse skin. DAS and 13C are constituents of garlic and cruciferous vegetables respectively. A significant iIthibition in GGT levels was also observed in a strong mitogen (12-o-tetradecanoyl phorbol-13-acetate) induced activity in mouse skin by pretreatment with DAS/13C. Therefore these dietary constituents seem to be strong modifiers of chemically induced carcinogenesis展开更多
Eighteen male piglets weaned at 28 days age were randomly assigned to one of three treatments (1% glutamate. 1% and 2% glutamine supplementation). The basal diet contained 5% raw soybean. The diets were calculated to ...Eighteen male piglets weaned at 28 days age were randomly assigned to one of three treatments (1% glutamate. 1% and 2% glutamine supplementation). The basal diet contained 5% raw soybean. The diets were calculated to be isonitrogenous and isoenergetic. The level of plasma glutahione(GSH) increased markedly in piglets fed glutamine, and the response was related to dose. In treatments I and I , the levels of plasma GSH were significantly higher than that in the control at the 35 days age (P<0.05). The level of plasma GSH in treatment I was significantly higher than that in the control at 42 days age (P<0. 05). At 49 days age, there was no significantly difference of the level of GSH in plasma, liver, spleen, intestine and mes-enteric lymph node. The level of superoxide dismutase (SOD) in liver and spleen was higher than that of the control, however, the difference wasn't significant. Dietary glutamine supplementation decreased γ-glutamyl transpeptidase(γ-GT) activities in liver. The activities of γ-GT of liver protein in treatmentⅡ were significantly lower than that in the control (P<0.05). The activities ofγ-GT of duodenum in treatments I and Ⅱwere also significantly lower than that in the control (P<0.05). But there were no significant differences of the activities of γ-GT in jejunum and ileum. The results showed that dietary glutamine supplementation increased the level of plasma GSH, and decreased γ-GT activities.展开更多
Polyamides with chiral environment were obtained from aromatic diamine, 1,3-phenylenediamine (1,3-PDA) or 1,4- phenylenediamine (1,4-PDA), and N-α-benzoyl-L-glutamic acid (Benzoyl-L-Glu). The optical rotation ([α]D)...Polyamides with chiral environment were obtained from aromatic diamine, 1,3-phenylenediamine (1,3-PDA) or 1,4- phenylenediamine (1,4-PDA), and N-α-benzoyl-L-glutamic acid (Benzoyl-L-Glu). The optical rotation ([α]D) for 1,3- PDA-Benzoyl-L-Glu was determined to be 3.7 deg cm2 g–1, while that for 1,4-PDA-Benzoyl-L-Glu to be 9.7 deg cm2 g–1. 1,3-PDA-Benzoyl-L-Glu showed adsorption selectivity toward D-Glu and its adsorption selectivity was determined to be 1.68. Contrary to this, 1,4-PDA-Benzoyl-L-Glu showed adsorption selectivity toward L-Glu and the adsorption selectivity toward L-Glu was determined to be 1.33. From those results, those two types of chiral polyamide are expected to applicable to chiral separation or chiral recognition.展开更多
The method of serum gamma-glutamyl transferase colorimeter assay was modified by changing the wave length from 420 nm to 400 nm, the incubated temperature from 37℃ to 50℃, the sample amount from 30 μl to 6μl. The ...The method of serum gamma-glutamyl transferase colorimeter assay was modified by changing the wave length from 420 nm to 400 nm, the incubated temperature from 37℃ to 50℃, the sample amount from 30 μl to 6μl. The modified method was proved to be more sensitive, with CV of intra-group being 2. 06% and accuracy 97. 4%. The method is suitable for clinical application with small-amount blood samples collected frorri earlobe or finger tip.展开更多
A randomized, double-blind, placebo-controlled clinical trial in Japanese habitual drinkers was conducted to evaluate the efficacy of Lactobacillus brevis SBC8803 to alleviate adverse effect of alcohol. Subjects who d...A randomized, double-blind, placebo-controlled clinical trial in Japanese habitual drinkers was conducted to evaluate the efficacy of Lactobacillus brevis SBC8803 to alleviate adverse effect of alcohol. Subjects who drank habitually and had moderately higher levels of gamma-glutamyl transferase (GGT) (50 - 100 IU/L) were enrolled. The levels of transaminases in these subjects were almost within normal levels (aspartate transaminase (AST) <30 IU/L and alanine transaminase (ALT) <40 IU/L). Either the capsules containing placebo (n = 23) or 130 mg (4.0 × 1010 colony-forming units) of live L. brevis SBC8803 (n = 22) per day were administered for the continuous eight weeks (56 days). During the period, the subjects both in test group and placebo groups have kept each drinking behavior as usual. Regarding lipid metabolism, triacylglycerol (TG) levels in the male test group significantly decreased at week 4 as compared with week 0. Biomarkers of hepatocytes-damage;AST and ALT levels showed no significant differences between the pla- cebo and test groups at both weeks 4 and 8. Oxidative stress marker;GGT at weeks 4 was significantly lower in the test group than that in the placebo group (p = 0.017), but not at weeks 8. However, taking a reduced rate of GGT at weeks 8 comparing with that at week 0, that in the test group showed larger value comparing with that in the placebo group. These data about TG and GGT suggest that, although efficacy of L. brevis SBC8803 is limited in this study, intake of the probiotic may alleviate alcoholic influence in lipid metabolism and oxidative stress.展开更多
Experimental evaluation of efficiency of a new prostatotropic medication tertapeptide lysil-glutamyl-aspartyl-proline (Lys-Glu-Asp-Pro)?in treatment of benign prostatic hyperplasia was performed in Wistar rats. The ef...Experimental evaluation of efficiency of a new prostatotropic medication tertapeptide lysil-glutamyl-aspartyl-proline (Lys-Glu-Asp-Pro)?in treatment of benign prostatic hyperplasia was performed in Wistar rats. The efficiency of the medication was compared with that one of injections of the?Serenoa repensextract. The investigation showed the statistically significant decrease in the square of the epithelium of acini. The same effect of similar severity was obtained when the?Serenoa repens?extract was applied. Tertapeptide Lys-Glu-Asp-Pro, in difference from?Serenoa repens?extract, also resulted in weight loss and volume decrease of the prostate gland.展开更多
Gamma glutamyl transferases (GGT) are highly conserved enzymes that occur from bacteria to humans. They remove terminal y-glutamyl residue from peptides and amides. GGTs play an important role in the homeostasis of ...Gamma glutamyl transferases (GGT) are highly conserved enzymes that occur from bacteria to humans. They remove terminal y-glutamyl residue from peptides and amides. GGTs play an important role in the homeostasis of glutathione (a major cellular antioxidant) and in the detoxification of xenobiotics in mammals. They are implicated in diseases like diabetes, inflammation, neurodegenerative diseases and cardiovascular diseases. The physiological role of GGTs in bacteria is still unclear. Nothing is known about the basis for the strong conservation of the enzyme across the living system. The review focuses on the enzyme's physiology, chemistry and structural properties of the enzyme with emphasis on the evolutionary relationships. The available data indicate that the members of the GGT family share common structural features but are functionally heterogenous.展开更多
Background:Limited data exist on the association of serum gamma-glutamyl transferase (GGT) level within the reference range with the increased risk of coronary heart disease (CHD) prediction in men.The study exam...Background:Limited data exist on the association of serum gamma-glutamyl transferase (GGT) level within the reference range with the increased risk of coronary heart disease (CHD) prediction in men.The study examined the association between serum GGT concentration within the reference range and the CHD risk prediction in Korean men.Methods:The study employed data from Korean National Health and Nutrition Examination Survey (V-1,2010 and V-2,2011) where a total of 1301 individuals were analyzed.A 10-year CHD risk prediction was computed using the Framingham Risk Score (FRS) modified by the National Cholesterol Education Program (NCEP) Adult Treatment Panel Ⅲ (ATP Ⅲ).Results:Positive correlations were established between log-transformed GGT concentration and FRS (r =0.237,P 〈 0.001).After adjustment of body mass index,the amount of alcohol intake and low-density lipoprotein-cholesterol,the odds ratio (95% confidence interval) for intermediate risk and beyond of 10-year CHD prediction (10-year risk ≥10%) with lowest quartile of participants was 1.21 (0.78-1.87) for second quartiles,1.39 (0.88-2.21) for third quartiles and 2.03 (1.23-3.34) for highest quartiles.Conclusions:Higher serum GGT within its reference range was significantly correlated with a 10-year CHD risk prediction estimation using NCEP ATP Ⅲ in Korean men.展开更多
目的探讨并分析急性非ST段抬高心肌梗死(NSTEMI)患者经皮冠状动脉介入治疗(PCI)术后血清纤维蛋白原/白蛋白值(FAR)、γ-谷氨酰转肽酶(γ-GGT),N端脑钠肽前体(NT-proBNP)水平对预后的预测价值。方法回顾性分析2020年2月至2023年2月邯郸...目的探讨并分析急性非ST段抬高心肌梗死(NSTEMI)患者经皮冠状动脉介入治疗(PCI)术后血清纤维蛋白原/白蛋白值(FAR)、γ-谷氨酰转肽酶(γ-GGT),N端脑钠肽前体(NT-proBNP)水平对预后的预测价值。方法回顾性分析2020年2月至2023年2月邯郸市中心医院收治的实施PCI的急性NSTEMI患者93例,根据术后30 d主要不良心血管事件(MACE)发生情况将其分为MACE组(n=21)及无MACE组(n=72)。比较术前、术后30 d MACE组及无MACE组血清FAR、γ-GGT、NT-proBNP水平,采用单因素和多因素Logistic回归分析对影响急性NSTEMI患者术后30 d MACE发生的危险因素进行分析,采用受试者操作特征(ROC)曲线分析血清FAR、γ-GGT、NT-proBNP水平对急性NSTEMI患者术后MACE发生的预测价值。结果MACE组年龄为(65.37±3.46)岁;Killip分级为Ⅰ级2例,Ⅱ级3例,Ⅲ级5例,Ⅳ级11例;病变支数双支5例,3支16例;术后30 d血清FAR、γ-GGT、NT-proBNP水平分别为(2.87±0.55)%、(53.27±3.06)U/L、(914.35±84.35)ng/mL。无MACE组的年龄为(58.71±2.86)岁;Killip分级为Ⅰ级32例,Ⅱ级27例,Ⅲ级7例,Ⅳ级6例;病变支数为双支53例,3支19例;术后30 d血清FAR、γ-GGT、NT-proBNP水平分别为(2.12±0.51)%、(44.33±3.35)U/L、(656.82±75.63)ng/mL。MACE组和无MACE组的年龄、Killip分级、病变支数及术后30 d血清FAR、γ-GGT、NT-proBNP水平比较,差异均有统计学意义(P<0.05),两组性别、吸烟史、高血压史、高血脂史、糖尿病史及术前1 d血清FAR、γ-GGT、NT-proBNP水平比较差异无统计学意义(P>0.05)。多因素Logistic回归分析结果显示,血清FAR、γ-GGT、NT-proBNP升高均为影响急性期NSTEMI患者术后MACE发生的独立危险因素(OR=3.074、2.686、3.340,P均<0.05)。ROC结果显示血清FAR、γ-GGT、NT-proBNP及其联合检测预测急性NSTEMI患者术后MACE发生的曲线下面积(AUC)分别为0.681、0.690、0.733和0.790,联合检测的AUC更高(P<0.05)。结论血清FAR、γ-GGT、NT-proBNP水平升高增加了急性NSTEMI患者PCI术后MACE的发生风险,三者联合检测对患者术后不良预后有一定预测价值。展开更多
基金Supported by Singapore National Medical Research Council,No.R182000180213
文摘Helicobacter pylori(H.pylori)produce an enzyme known asγ-glutamyl transpeptidase(HpGGT)that is highly conserved and common to all strains.HpGGT has been gaining increasing attention as an important virulence factor of the bacterium,having been demonstrated to be an important colonization factor in several animal models and has also recently been strongly associated with the development of peptic ulcer disease.From the results of various independent researcher groups,it is clear that HpGGT acts through several pathways to damage gastric epithelial cells including the induction of apoptosis and cell cycle arrest,production of reactive oxygen species leading to DNA damage,promotion of inflammation by increasing cyclooxygenase-2 and interleukin-8 expression,and upregulation of heparin-binding epidermal growth factor-like growth factor resulting in cell survival and proliferation.In addition,the potential role of HpGGT in promoting gastric carcinogenesis will also be discussed in this review.Apart from affecting the gastric epithelium,HpGGT also has immunomodulatory actions on host immune cells where it displays an antiproliferative effect on T cells by inducing cell cycle arrest and also works with other H.pylori virulence factors to skew dendritic cells towards a tolerogenic phenotype,possibly contributing to the persistence of the pathogen in the gastric mucosa.
基金Supported by Italian Ministry for University and Research(Progetto di Ricerca di Interesse Nazionale No.2009A37C8C_002,to Ricci V)Fondazione Cariplo Grant(No.2011-0485 to Ricci V)+2 种基金Second University of Naples(CIRANAD to Romano M)University of Naples "Federico Ⅱ"(Fondo d’Ateneo per la Ricercato Zarrilli R)
文摘Helicobacter pylori(H.pylori)gamma-glutamyl transpeptidase(GGT)is a bacterial virulence factor that converts glutamine into glutamate and ammonia,and converts glutathione into glutamate and cysteinylglycine.H.pylori GGT causes glutamine and glutathione consumption in the host cells,ammonia production and reactive oxygen species generation.These products induce cell-cycle arrest,apoptosis,and necrosis in gastric epithelial cells.H.pylori GGT may also inhibit apoptosis and induce gastric epithelial cell proliferation through the induction of cyclooxygenase-2,epidermal growth factor-related peptides,inducible nitric oxide synthase and interleukin-8.H.pylori GGT induces immune tolerance through the inhibition of T cell-mediated immunity and dendritic cell differentiation.The effect of GGT on H.pylori colonization and gastric persistence are also discussed.
基金supported by the Jiangsu Provincial Medical Youth Talent of the Project of Invigorating Health Care through Science,Technology and Education(Grant No.QNRC2016694)the Six Talents Peak Project of Jiangsu Province(Grant No.2015-WSN-061)+2 种基金the fifth‘226’High Level Talent Training Project of Nantong Citythe National Natural Science Foundation of China(Grant No.81502867)the Technology Innovation Programme of Nantong University(Grant No.YKS14017)
文摘Objective We aim to explore the potential association between serum gamma-glutamyl transferase levels and functional outcome after aneurysmal subarachnoid hemorrhage in a Chinese population. Methods A total of 386 aneurysmal subarachnoid hemorrhage patients were included in the study from September 2007 to February 2015. Baseline serum gamma-glutamyl transferase levels and 6-month follow-up functional outcomes were determined. A poor outcome was defined as a modified ranking scale score of ≥ 3. The multivariable logistic model was used to analyze the relationship between serum gamma-glutamyl transferase and clinical outcomes after aneurysmal subarachnoid hemorrhage. Results The adjusted poor outcome rates of patients with gamma-glutamyl transferase levels of 〈 30 U/L, 30-50 U/L and ≥ 50 U/L were 16.7%, 19.6%, and 34.4%, respectively (P 〈 0.01). The age-sex and multivariable adjusted odds ratios (95% confidence intervals) of poor prognosis comparing the top group (≥ 50 U/L) with the lowest group (〈 30 U/L) were 5.76 (2.74-12.13), 6.64 (2.05-21.52), and 6.36 (1.92-21.02). A significant linear trend existed between gamma-glutamyl transferase level and aneurysmal subarachnoid hemorrhage prognosis. This association was also observed among nondrinkers. Conclusion Patients with higher gamma-glutamyl transferase levels were more likely to have a poor prognosis. Serum gamma-glutamyl transferase can be considered to be an independent predictor of functional outcomes after aneurysmal subarachnoid hemorrhage.
基金Supported by National Natural Science Foundation of China,No.81470093Jiangsu Provincial Outstanding Medical Academic Leader Program,No.LJ201154Jiangsu Provincial Clinical Medicine and Technology Special Program,No.BL2012034
文摘AIM:To investigate the association of serum gammaglutamyl transferase(GGT) levels with chronic hepatitis B infection and hepatitis B e antigen(HBe Ag) seroconversion.METHODS:A retrospective study was performed on clinical data collected from patients who had been positive for hepatitis B surface antigen for > 6 mo and who were antiviral-treatment na?ve(n = 215) attending the Hepatitis Clinic at Nanjing Drum Tower Hospital between August 2010 and December 2013. Healthy individuals without liver disease(n = 83) were included as controls. Patients were categorized into four groups based on disease status as recommended by the European Association for the Study of the Liver:immune tolerance(IT; n = 47),HBe Ag-positive hepatitis(EPH; n = 93),HBe Ag-negative hepatitis(ENH;n = 20),and inactive carrier(IC; n = 55). Prediction of complete response(CR) based on serum GGT was also examined in EPH patients(n = 33) treated for 48 wk with nucleos(t)ide analogue(NA) therapy,including lamivudine plus adefovir combination therapy(n = 20) or entecavir monotherapy(n = 13). CR was defined as a serum hepatitis B virus DNA level < 500 copies/m L and HBe Ag seroconversion by 48 wk of treatment. RESULTS:Serum GGT levels were significantly increased in EPH and ENH patients relative to the IT,IC,and healthy control groups(P < 0.01 for all). However,no significant difference in serum GGT levels was found between the EPH and ENH groups. Baseline serum GGT levels were significantly higher in patients who achieved CR(7/33; 21.2%) compared to patients in the non-CR group(26/33; 78.8%; P = 0.011). In addition,the decline in serum GGT was greater in CR patients compared to non-CR patients after 24 wk and 48 wk of treatment(P = 0.012 and P = 0.008,respectively). The receiver operating characteristic curve yielded a sensitivity of 85.71% and a specificity of 61.54% at a threshold value of 0.89 times the upper limit of normal for baseline serum GGT in the prediction of CR following NA therapy. CONCLUSION:Serum GGT is significantly elevated in EPH and ENH patients and is a potential biomarker for the prediction of HBe Ag seroconversion following NA therapy.
文摘BACKGROUND There is increasing interest in transplanting patients with hepatocellularcarcinoma (HCC) with tumors greater than 5 cm (Milan criteria).AIM To investigate possible prognostically-useful factors for liver transplantation inHCC patients with large tumors.METHODS In this clinical study, 50 patients with HCC who were transplanted at our LiverTransplant Center between April 2006 and August 2019 and had tumors greaterthan 6 cm maximum diameter were retrospectively analyzed. Their survival andfull clinical characteristics were examined, with respect to serum alphafetoprotein(AFP) and gamma glutamyl transpeptidase (GGT) levels. Kaplan-Meier survival estimates were used to determine overall survival and disease-freesurvival in these patients. The inclusion criterion was evidence of HCC. Exclusioncriteria were the presence of macroscopic portal vein thrombosis or metastasisand a follow-up period of less than 90 d.RESULTS Using receiver operating characteristic curve (ROC) analysis, cutoff values of AFP200 ng/mL and GGT 104 IU/L were identified and used in this study.Significantly longer overall survival (OS) and disease-free-survival (DFS) were found in patients who had lower values of either parameter, compared withhigher values. Even greater differences in survival were found when the 2parameters were combined. Two tumor size bands were identified, in searchingfor the limits of this approach with larger tumors, namely 6-10 cm and > 10 cm.Combination parameters in the 6-10 cm band reflected 5-year OS of 76.2% inpatients with low AFP plus low GGT vs 0% for all other groups. Patients withtumors greater than 10 cm, did not have low AFP plus low GGT. The mostconsistent clinical correlates for longer survival were degree of tumordifferentiation and absence of microscopic portal venous invasion.CONCLUSION Serum levels of AFP and GGT, both alone and combined, represent a simpleprognostic identifier in patients with large HCCs undergoing liver transplantation.
文摘·AIM:To investigate the independent pathogenic role of high serum gamma-glutamyl transferase (GGT) levels, sociodemographic data, dietary and environmental risk factors for visual disability (VD). ·METHODS:This was a case-control study, run in 200 black Congolese patients managed in Saint Joseph Hospital Ophthalmology Division from Kinshasa town. Logistic regression model was used to identify determinants of VD (n = 58) among sex, age, cigarette smoking, alcohol abuse, rural-urban migration, education levels, aging ≥60 years, intake of red Beans, Safou fruit and Taro leaves, lipid profile, residence, socioeconomic status, and GGT. ·RESULTS:After adjusting for confounding factors, we identified migration (OR=3.7 95% CI:1.2-11.3; P =0.023), low education level (OR=3.1 95% CI 1.1-8.5; P =0.026), no intake of Safou fruit (OR=34.2 95% CI 11.5-102; P < 0.0001), age ≥60 years (OR=2.5 95% CI 1.01-6.5; P = 0.049), and serum GGT ≥10U/L (OR=3.6 95% CI 1.3-9.6; P = 0.012) as the significant and independent determinants of VD. ·CONCLUSION:VD appears as a major public health problem in Central Africa to be prevented or delayed by control of migration, lifestyle changes, antioxidant supplements, appropriate diet, nutrition education, and blocking of oxidative stress.
文摘BACKGROUND Gamma-glutamyl transferase(GGT)is associated with the risk of cardiovascular disease(CVD)in the general population.AIM To identify the association of baseline GGT level and QRISK2 score among patients with biopsy-proven nonalcoholic fatty liver disease(NAFLD).METHODS This was a retrospective study involving 1535 biopsy-proven NAFLD patients from 10 Asian centers in 8 countries using data collected by the Gut and Obesity in Asia(referred to as“GO ASIA”)workgroup.All patients with available baseline GGT levels and all 16 variables for the QRISK2 calculation(QRISK2-2017;developed by researchers at the United Kingdom National Health Service;https://qrisk.org/2017/;10-year cardiovascular risk estimation)were included and compared to healthy controls with the same age,sex,and ethnicity.Relative risk was reported.QRISK2 score>10%was defined as the high-CVD-risk group.Fibrosis stages 3 and 4(F3 and F4)were considered advanced fibrosis.RESULTS A total of 1122 patients(73%)had complete data and were included in the final analysis;314(28%)had advanced fibrosis.The median age(interquartile range[IQR])of the study population was 53(44-60)years,532(47.4%)were females,and 492(43.9%)were of Chinese ethnicity.The median 10-year CVD risk(IQR)was 5.9%(2.6-10.9),and the median relative risk of CVD over 10 years(IQR)was 1.65(1.13-2.2)compared to healthy individuals with the same age,sex,and ethnicity.The high-CVD-risk group was significantly older than the low-risk group(median[IQR]:63[59-67]vs 49[41-55]years;P<0.001).Higher fibrosis stages in biopsy-proven NAFLD patients brought a significantly higher CVD risk(P<0.001).Median GGT level was not different between the two groups(GGT[U/L]:Median[IQR],high risk 60[37-113]vs low risk 66[38-103],P=0.56).There was no correlation between baseline GGT level and 10-year CVD risk based on the QRISK2 score(r=0.02).CONCLUSION The CVD risk of NAFLD patients is higher than that of healthy individuals.Baseline GGT level cannot predict CVD risk in NAFLD patients.However,advanced fibrosis is a predictor of a high CVD risk.
文摘To investigate the exon mutation of vitamin K-dependent gamma-glutamyl carboxylase (GGCX or VKDC) in patients with calcium oxalate urolithasis, renal cortex and peripheral blood samples were obtained from severe hydronephrosis patients (with or without calculi), and renal tumor patients undergoing nephrectomy. GGCX mutations in all 15 exons were examined in 44 patients with calcium oxalate urolithiasis (COU) by polymerase chain reaction (PCR) and denatured high pressure liquid chromatography (DHPLC), and confirmed by sequencing. Mutation was not found in all COU samples compared to the controls. These data demonstrated that functional GGCX mutations in all 15 exons do not occur in most COU patients. It was suggested that there may be no significant association between the low activity and mutation of GGCX in COU.
文摘Cancer chemoprevention, a desirable and important facet of biomedical research, provides a practical approach to identify potentially useful inhibitors of cancer development, and offers an opporiunity to study the mechanism of carcinogenesis. During the recent Past a number of compounds have been tested for their anticarcinogenic potential specially constituents of our diet. The enzyme γglutamyl transpeptidase (GGT) which catalyses the transfer of glutamyl groups of peptides to other peptides and amino acid and has been proposed as a marker of cell proliferation and neoplasia. It also serves as a tool to evaluate the carcinogenic and cocarcinogenic potential of environmental toxicants. In the present investigations, CGT activity induced by careinogenic polycyclic aromatic hydmiarbons, viz. 7, 12-dimethylbenz(a) anthracene (DMBA) and benzo(a) pyrene (BaP) was significantly inhibited by diallylsulfide (DAS) and indole-3-carbnol (I3C) in mouse skin. DAS and 13C are constituents of garlic and cruciferous vegetables respectively. A significant iIthibition in GGT levels was also observed in a strong mitogen (12-o-tetradecanoyl phorbol-13-acetate) induced activity in mouse skin by pretreatment with DAS/13C. Therefore these dietary constituents seem to be strong modifiers of chemically induced carcinogenesis
文摘Eighteen male piglets weaned at 28 days age were randomly assigned to one of three treatments (1% glutamate. 1% and 2% glutamine supplementation). The basal diet contained 5% raw soybean. The diets were calculated to be isonitrogenous and isoenergetic. The level of plasma glutahione(GSH) increased markedly in piglets fed glutamine, and the response was related to dose. In treatments I and I , the levels of plasma GSH were significantly higher than that in the control at the 35 days age (P<0.05). The level of plasma GSH in treatment I was significantly higher than that in the control at 42 days age (P<0. 05). At 49 days age, there was no significantly difference of the level of GSH in plasma, liver, spleen, intestine and mes-enteric lymph node. The level of superoxide dismutase (SOD) in liver and spleen was higher than that of the control, however, the difference wasn't significant. Dietary glutamine supplementation decreased γ-glutamyl transpeptidase(γ-GT) activities in liver. The activities of γ-GT of liver protein in treatmentⅡ were significantly lower than that in the control (P<0.05). The activities ofγ-GT of duodenum in treatments I and Ⅱwere also significantly lower than that in the control (P<0.05). But there were no significant differences of the activities of γ-GT in jejunum and ileum. The results showed that dietary glutamine supplementation increased the level of plasma GSH, and decreased γ-GT activities.
文摘Polyamides with chiral environment were obtained from aromatic diamine, 1,3-phenylenediamine (1,3-PDA) or 1,4- phenylenediamine (1,4-PDA), and N-α-benzoyl-L-glutamic acid (Benzoyl-L-Glu). The optical rotation ([α]D) for 1,3- PDA-Benzoyl-L-Glu was determined to be 3.7 deg cm2 g–1, while that for 1,4-PDA-Benzoyl-L-Glu to be 9.7 deg cm2 g–1. 1,3-PDA-Benzoyl-L-Glu showed adsorption selectivity toward D-Glu and its adsorption selectivity was determined to be 1.68. Contrary to this, 1,4-PDA-Benzoyl-L-Glu showed adsorption selectivity toward L-Glu and the adsorption selectivity toward L-Glu was determined to be 1.33. From those results, those two types of chiral polyamide are expected to applicable to chiral separation or chiral recognition.
文摘The method of serum gamma-glutamyl transferase colorimeter assay was modified by changing the wave length from 420 nm to 400 nm, the incubated temperature from 37℃ to 50℃, the sample amount from 30 μl to 6μl. The modified method was proved to be more sensitive, with CV of intra-group being 2. 06% and accuracy 97. 4%. The method is suitable for clinical application with small-amount blood samples collected frorri earlobe or finger tip.
文摘A randomized, double-blind, placebo-controlled clinical trial in Japanese habitual drinkers was conducted to evaluate the efficacy of Lactobacillus brevis SBC8803 to alleviate adverse effect of alcohol. Subjects who drank habitually and had moderately higher levels of gamma-glutamyl transferase (GGT) (50 - 100 IU/L) were enrolled. The levels of transaminases in these subjects were almost within normal levels (aspartate transaminase (AST) <30 IU/L and alanine transaminase (ALT) <40 IU/L). Either the capsules containing placebo (n = 23) or 130 mg (4.0 × 1010 colony-forming units) of live L. brevis SBC8803 (n = 22) per day were administered for the continuous eight weeks (56 days). During the period, the subjects both in test group and placebo groups have kept each drinking behavior as usual. Regarding lipid metabolism, triacylglycerol (TG) levels in the male test group significantly decreased at week 4 as compared with week 0. Biomarkers of hepatocytes-damage;AST and ALT levels showed no significant differences between the pla- cebo and test groups at both weeks 4 and 8. Oxidative stress marker;GGT at weeks 4 was significantly lower in the test group than that in the placebo group (p = 0.017), but not at weeks 8. However, taking a reduced rate of GGT at weeks 8 comparing with that at week 0, that in the test group showed larger value comparing with that in the placebo group. These data about TG and GGT suggest that, although efficacy of L. brevis SBC8803 is limited in this study, intake of the probiotic may alleviate alcoholic influence in lipid metabolism and oxidative stress.
文摘Experimental evaluation of efficiency of a new prostatotropic medication tertapeptide lysil-glutamyl-aspartyl-proline (Lys-Glu-Asp-Pro)?in treatment of benign prostatic hyperplasia was performed in Wistar rats. The efficiency of the medication was compared with that one of injections of the?Serenoa repensextract. The investigation showed the statistically significant decrease in the square of the epithelium of acini. The same effect of similar severity was obtained when the?Serenoa repens?extract was applied. Tertapeptide Lys-Glu-Asp-Pro, in difference from?Serenoa repens?extract, also resulted in weight loss and volume decrease of the prostate gland.
文摘Gamma glutamyl transferases (GGT) are highly conserved enzymes that occur from bacteria to humans. They remove terminal y-glutamyl residue from peptides and amides. GGTs play an important role in the homeostasis of glutathione (a major cellular antioxidant) and in the detoxification of xenobiotics in mammals. They are implicated in diseases like diabetes, inflammation, neurodegenerative diseases and cardiovascular diseases. The physiological role of GGTs in bacteria is still unclear. Nothing is known about the basis for the strong conservation of the enzyme across the living system. The review focuses on the enzyme's physiology, chemistry and structural properties of the enzyme with emphasis on the evolutionary relationships. The available data indicate that the members of the GGT family share common structural features but are functionally heterogenous.
文摘Background:Limited data exist on the association of serum gamma-glutamyl transferase (GGT) level within the reference range with the increased risk of coronary heart disease (CHD) prediction in men.The study examined the association between serum GGT concentration within the reference range and the CHD risk prediction in Korean men.Methods:The study employed data from Korean National Health and Nutrition Examination Survey (V-1,2010 and V-2,2011) where a total of 1301 individuals were analyzed.A 10-year CHD risk prediction was computed using the Framingham Risk Score (FRS) modified by the National Cholesterol Education Program (NCEP) Adult Treatment Panel Ⅲ (ATP Ⅲ).Results:Positive correlations were established between log-transformed GGT concentration and FRS (r =0.237,P 〈 0.001).After adjustment of body mass index,the amount of alcohol intake and low-density lipoprotein-cholesterol,the odds ratio (95% confidence interval) for intermediate risk and beyond of 10-year CHD prediction (10-year risk ≥10%) with lowest quartile of participants was 1.21 (0.78-1.87) for second quartiles,1.39 (0.88-2.21) for third quartiles and 2.03 (1.23-3.34) for highest quartiles.Conclusions:Higher serum GGT within its reference range was significantly correlated with a 10-year CHD risk prediction estimation using NCEP ATP Ⅲ in Korean men.
文摘目的探讨并分析急性非ST段抬高心肌梗死(NSTEMI)患者经皮冠状动脉介入治疗(PCI)术后血清纤维蛋白原/白蛋白值(FAR)、γ-谷氨酰转肽酶(γ-GGT),N端脑钠肽前体(NT-proBNP)水平对预后的预测价值。方法回顾性分析2020年2月至2023年2月邯郸市中心医院收治的实施PCI的急性NSTEMI患者93例,根据术后30 d主要不良心血管事件(MACE)发生情况将其分为MACE组(n=21)及无MACE组(n=72)。比较术前、术后30 d MACE组及无MACE组血清FAR、γ-GGT、NT-proBNP水平,采用单因素和多因素Logistic回归分析对影响急性NSTEMI患者术后30 d MACE发生的危险因素进行分析,采用受试者操作特征(ROC)曲线分析血清FAR、γ-GGT、NT-proBNP水平对急性NSTEMI患者术后MACE发生的预测价值。结果MACE组年龄为(65.37±3.46)岁;Killip分级为Ⅰ级2例,Ⅱ级3例,Ⅲ级5例,Ⅳ级11例;病变支数双支5例,3支16例;术后30 d血清FAR、γ-GGT、NT-proBNP水平分别为(2.87±0.55)%、(53.27±3.06)U/L、(914.35±84.35)ng/mL。无MACE组的年龄为(58.71±2.86)岁;Killip分级为Ⅰ级32例,Ⅱ级27例,Ⅲ级7例,Ⅳ级6例;病变支数为双支53例,3支19例;术后30 d血清FAR、γ-GGT、NT-proBNP水平分别为(2.12±0.51)%、(44.33±3.35)U/L、(656.82±75.63)ng/mL。MACE组和无MACE组的年龄、Killip分级、病变支数及术后30 d血清FAR、γ-GGT、NT-proBNP水平比较,差异均有统计学意义(P<0.05),两组性别、吸烟史、高血压史、高血脂史、糖尿病史及术前1 d血清FAR、γ-GGT、NT-proBNP水平比较差异无统计学意义(P>0.05)。多因素Logistic回归分析结果显示,血清FAR、γ-GGT、NT-proBNP升高均为影响急性期NSTEMI患者术后MACE发生的独立危险因素(OR=3.074、2.686、3.340,P均<0.05)。ROC结果显示血清FAR、γ-GGT、NT-proBNP及其联合检测预测急性NSTEMI患者术后MACE发生的曲线下面积(AUC)分别为0.681、0.690、0.733和0.790,联合检测的AUC更高(P<0.05)。结论血清FAR、γ-GGT、NT-proBNP水平升高增加了急性NSTEMI患者PCI术后MACE的发生风险,三者联合检测对患者术后不良预后有一定预测价值。