Gamma-glutamyl transpeptidase and indirect bilirubin may participate in systemic inflammation of patients with psoriatic arthritis

Abstract Background Previous studies have suggested that systemic metabolic abnormalities are closely related to psoriatic arthritis (PsA). Gamma-glutamyl transpeptidase (GGT) and indirect bilirubin (IBIL), two essential active substances in hepatic metabolism that have been demonstrated as an oxidative and anti-oxidative factor respectively, have been proved to be involved in oxidative stress damage and inflammation in several human diseases. However, their role in PsA remains unclear. Methods In this retrospective comparative cohort study, a case group of 68 PsA patients and a control group of 73 healthy volunteers from the Third Hospital of Hebei Medical University were enrolled. Serum GGT, IBIL, GGT/IBIL ratio and C-reactive protein (CRP), a well applied bio-marker of systemic inflammatory in PsA, were compared between the two groups. Furthermore, the relationship of GGT, IBIL and GGT/IBIL with CRP were explored in PsA patients. Finally, the patients were divided into high inflammation group and low inflammation group according to the median value of CRP. Multivariate logistic regression analyses were used for the association of systemic inflammation level with GGT, IBIL and GGT/IBIL. Results Compared with healthy controls, PsA patients exhibited significantly higher serum GGT, GGT/IBIL, and CRP levels and lower IBIL levels. Serum GGT and GGT/IBIL were positively correlated with CRP, whereas IBIL were negatively correlated with CRP. Binary logistic regression analysis revealed that serum GGT was a risk factor for high CRP in PsA, whereas IBIL was a protective factor. Furthermore, GGT/IBIL was a better indicator of high CRP condition in PsA patients than either GGT or IBIL alone, as determined by the receiver operating characteristic curves. Conclusion GGT and IBIL may participate in the pathogenesis of PsA. Additionally, GGT, IBIL and the balance of the two may reflect systemic inflammation mediated by oxidative stress events related to metabolic abnormalities to a certain extent.

The gamma-glutamyl transpeptidase to platelet ratio (GPR) and the gammaglutamyl transpeptidase to albumin (GAR) versus fibroscan as indicators of hepatic fibrosis in Non-Alcoholic Fatty Liver Disease Patients

Background: Identifying patients at risk with Non-alcoholic fatty liver disease (NAFLD) related fibrosis is crucial. Many noninvasive fibrosis markers were developed recently in chronic hepatitis C and B patients, but a few were evaluated in NAFLD. Aim: to assess the accuracy of the gamma-glutamyl transpeptidase and the other noninvasive markers gamma-glutamyl transpeptidase-to-platelet ratio and gammaglutamyl transpeptidase-to-albumin ratio (GPR and GAR) versus fibroscan as indicators of hepatic fibrosis in NAFLD patients. Patients and Methods: A total of 100 NAFLD patients were examined by abdominal ultrasound and then fibroscan to assess liver steatosis and fibrosis. They were grouped into the early fibrosis group and the advanced fibrosis group. Demographic data and laboratory investigation were collected. GPR and GAR were calculated. The correlation between them and liver stiffness measurement (LSM) was reported. The accuracy of predicting liver fibrosis was assessed. Results: There was a significant positive correlation between GPR and GAR and the degree of fibrosis. GPR (P <0.001*) and GAR (P <0.001*) were independent predictors for advanced hepatic fibrosis by multiple linear regression analysis. Fibrosis score was used as the dependent variable, with the other studied biomarkers as independent variables. The AUCs of GPR and GAR were 0.790 and 0.949 in assessing liver fibrosis, respectively. Conclusion: GPR and GAR were positively correlated with hepatic fibrosis and may be used as a novel, simple, accurate, and low-cost parameter for diagnosing hepatic fibrosis in NAFLD patients.

Gamma-glutamyl transpeptidase-platelet ratio, systemic immune inflammation index, and system inflammation response index in invasive Aspergillosis

SUMMARY OBJECTIVE: Gamma-glutamyl transpeptidase-platelet ratio, system inflammation response index, and systemic immune inflammation index are three systemic immune and inflammation indexes that were investigated for their diagnostic and prognostic proficiencies in cardiovascular diseases and cancers. However, their predictive values for invasive aspergillosis have not yet been studied. The aim of this study was to evaluate Gamma-glutamyl transpeptidase-platelet ratio, system inflammation response index, and systemic immune inflammation index levels and their diagnostic values in invasive aspergillosis. METHODS: A total of 23 patients with invasive aspergillosis and 23 sex- and age-matched healthy participants were included in this study. Complete blood count parameters and liver function tests were studied. Gamma-glutamyl transpeptidase-platelet ratio, system inflammation response index, and systemic immune inflammation index were calculated. RESULTS: Leukocyte, neutrophil, lymphocyte, and monocyte levels were statistically significantly higher in IA group (p=0.031, p=0.027, p=0.033, and p=0.001, respectively). In invasive aspergillosis group, platelets were numerically lower; Aspartate transaminase, alanine aminotransferase, and lactic dehydrogenase levels were numerically higher than those in control group but differences between levels were not statistically significant (p>0.05). The γ-glutamyl transpeptidase levels of patients were statistically significantly higher (p=0.007), and in addition, statistically significant differences were found between groups in terms of gamma-glutamyl transpeptidase-platelet ratio, system inflammation response index, and systemic immune inflammation index (p<0.001, p=0.037, p=0.001, respectively). Receiver operating characteristic analysis was performed, and areas under the curves were evaluated. gamma-glutamyl transpeptidase-platelet ratio had the higher area under the curve than systemic immune inflammation index and system inflammation response index (AUC 0.849, 0.798, 0.693, respectively). The results from receiver operating characteristic analysis of the data suggested that the use of a cutoff value of 0.15 for gamma-glutamyl transpeptidase-platelet ratio would be optimum for clinical use to confirm independent predictors of patients with invasive aspergillosis. CONCLUSIONS: Gamma-glutamyl transpeptidase-platelet ratio is an independent, a useful predictor, and is superior to other evaluated markers in the diagnosis of inflammation in invasive aspergillosis. Gamma-glutamyl transpeptidase-platelet ratio may also be a helpful biomarker for clinicians to follow-up the inflammatory process of these patients.

Gamma glutamil transferasa, marcador de eficacia clínica del ozono médico y su papel en la artritis reumatoide y la osteoartritis de rodilla / Gamma glutamyl transferase: an indicator of medical ozone clinical efficacy and its pathological role in rheumatoid arthritis and knee osteoarthritis

Introducción: El ozono médico tiene eficacia clínica e incrementa la relación beneficio/riesgo en pacientes con artritis reumatoide tratados con la terapia combinada metotrexate + ozono. Hoy, la gamma glutamil transferasa se considera como un marcador de riesgo de enfermedades de una alta morbilidad y mortalidad, y tiene particular valor en la artritis reumatoide por desempeñar un papel patológico asociado al estrés oxidativo y a la remodelación ósea, lo que causa daño al cartílago y al hueso. Objetivo: Evaluar los efectos del ozono médico sobre los niveles de gamma glutamil transferasa. Métodos: Se estudiaron pacientes portadores de dos enfermedades artríticas: artritis reumatoide (n = 100; grupo tratado con metotrexate [n = 50] y grupo con metotrexate + ozono [n = 50]) y osteoartritis de rodilla (n = 40; grupo precondicionado con ozono antes de la artroscopía [n = 20] y grupo sin pretratamiento con ozono antes de la artroscopía [n = 20]). Los pacientes con artritis reumatoide fueron valorados con indicadores clínicos específicos, incluidos los niveles de anticuerpos contra péptidos cíclicos citrulinados, así como las concentraciones de glutatión reducido, importante antioxidante endógeno. Resultados: El ozono médico reguló la actividad sérica de gamma glutamil transferasa. Correlacionó de forma inversamente proporcional con los niveles de glutatión reducido que, a su vez, fue el único marcador redox que para los pacientes tratados con la terapia combinada metotrexate + ozono fue directamente proporcional con todas las variables clínicas evaluadas. Conclusión: Se debe considerar a la gamma glutamil transferasa un indicador de la eficacia clínica del ozono médico en las enfermedades estudiadas, por su doble función: biomarcador de estrés oxidativo e indicador de la remodelación patológica del hueso(AU)

Introduction: Medical ozone has demonstrated its clinical efficacy as well as the increase of beneficial/risk relationship in rheumatoid arthritis patients treated with metotrexate+ozone combined therapy. At present, gamma-glutamyl transpeptidase is considered as risk indicator of high morbimortality diseases. It has a special value in arthritis diseases due to its pathologic role associated to oxidative stress and in the abnormal bone remodeling processes. Objective: Assess the ozone medical effects on gamma-glutamyl transpeptidase levels. Method: Patients who suffered of two arthritic diseases: rheumatoid arthritis (n=100; Group treated with Metotrexate (n=50) and metotrexate+ozone (n=50) and knee osteoarthritis (n=40); Group preconditioned with ozone before arthroscopy (n=20) and Group without previous treatment with ozone before arthroscopy (n=20). Rheumatoid arthritis patients were assessed through specific clinic indicators which included antibodies against cyclic citrullinate peptides as well as reduced gluthatione concentrations which are an important endogenous antioxidant. Results: Medical ozone regulated serum gamma-glutamyl transpeptidase activity which correlated in inverse proportion to reduced glutathione levels which was the only one redox marker that correlated with all clinical variables (p < 0.05) when patients were treated with metotrexate+ozone. Conclusion: Gamma-glutamyl transpeptidase should be considered as biomarker of medical ozone clinical efficacy in rheumatoid arthritis and knee osteoarthritis due to GGT´s both pathologic functions: indicator of oxidative stress and abnormal bone remodeling processes(AU)

Asociación entre elevación sérica de gamma-glutamil transpeptidasa y riesgo aumentado de evento vascular cerebral isquémico en población mexicana / Relation between serum elevation of gamma-glutamyl transpeptidase and increased risk of ischemic stroke in Mexican population

Resumen: ANTECEDENTES: Las concentraciones elevadas de gamma-glutamil transpeptidasa (GGT) se han asociado con el riesgo de enfermedad coronaria isquémica, diabetes mellitus tipo 2 y evento vascular cerebral. OBJETIVO: Determinar mediante métodos estadísticos estandarizados que la elevación sérica de gamma-glutamil transpeptidasa es predictor temprano de evento vascular cerebral en la población mexicana. MATERIAL Y MÉTODO: Estudio tipo casos y controles, con medición de GGT sérica en pacientes con enfermedades crónico-degenerativas en control y pacientes crónicos con un evento cardiovascular adverso, en este caso, un evento vascular cerebral de tipo isquémico (EVC), efectuado de mayo de 2016 a julio de 2017. RESULTADOS: Se incluyeron 74 pacientes; los pacientes con EVC tuvieron, en pro- medio, 17.81 U/L de GGT más que los controles ajustado por edad, con diferencia estadísticamente significativa (p = 0.038, IC95% 1.04-34.57). CONCLUSIONES: Las concentraciones de gamma-glutamil transpeptidasa se correlacionan de manera directamente proporcional con el riesgo cardiovascular, lo que tiene gran importancia debido a que se ha demostrado que sus concentraciones séricas pueden disminuirse con medidas como dieta y ejercicio, por lo que se abre un amplio panorama para posteriores estudios que puedan reafirmar la validez de éste y hacer otros con un enfoque preventivo.

Abstract: BACKGROUND: Elevated levels of gamma-glutamyl transpeptidase (GGT) have been associated with the risk of ischemic heart disease, diabetes mellitus and stroke. OBJECTIVE: To determine, by means of standardized statistical methods, that the serum elevation of GGT is an early predictor of ischemic stroke in the Mexican population. MATERIAL AND METHOD: A case-control study was conducted with measurement of serum GGT in patients with chronic-degenerative diseases without cardiovascular events and chronic patients with an adverse cardiovascular event, in this case, an ischemic stroke, done from May 2016 to June 2017. RESULTS: A total of 74 patients were analyzed; patients with ischemic stroke presented, on average, 17.81 U/L of GGT more than controls adjusted for age, with a statistically significant difference (p = 0.038, 95%CI 1.04- 34.57). CONCLUSIONS: GGT levels correlated directly with cardiovascular risk, which is of great importance, since it has been shown that serum levels can be reduced with measures such as diet and exercise, so that a broad panorama opens up for further studies that can reaffirm the validity of this study and do others with a preventive approach.

The association between ratio index of gamma glutamyl transpeptidase/platelet and the prognosis of patients with hepatitis B virus related hepatocellular carcinoma before liver resection / 天津医药

Objective To explore the association between ratio index of gamma glutamyl transpeptidase/platelet (GPRI) and the prognosis of patients with hepatitis B virus (HBV) related hepatocellular carcinoma (HCC) before liver resection. Methods A total of 368 patients underwent liver resection for HBV-related HCC were retrospectively analyzed in this study. Patients were divided into high GPRI group (n=184, GPRI≥0.38) and low GPRI group (n=184, GPRI<0.38). Clinicopathologic characteristics including overall survival (OS) and disease-free survival (DFS) were compared between the two groups. Independent risk factors influencing DFS and OS were determined by Cox multivariate analysis. Results Compared to low GPRI group, there were higher levels of serum total bilirubin and alanine aminotransferase, higher proportions of tumor diameter larger than 10 cm, amount of tumou more than 3, and patients with macrovascular invasion and intermediate or advanced HCC in high GPRI group (all P<0.05). Values of DFS at 1, 3, and 5 years were significantly lower in high GPRI group (50.8%, 16.9%and 5.7%) than those in low GPRI group (69.0%, 33.3%, 10.7%;P=0.001). Values of OS at 1, 3, and 5 years were also significantly lower in high GPRI group (75.0%, 51.8%and 36.0%) than those in low GPRI group (89.8%, 72.8%and 63.2%;P<0.05). Cox multivariate analysis also demonstrated that GPRI ≥0.38 was an independent risk factor for DFS and OS in patients with HBV-related HCC after liver resection. Conclusion Preoperative GPRI can predict tumor recurrence and long-term survival in patients with HBV-related HCC after liver resection.

Observation on serumγ-glutamyl transpeptidase levels of patients with sub-clinical schistosomiasis before and after pathogen treatment / 中国血吸虫病防治杂志

Objective To observe the changes of serumγ?glutamyl transpeptidase(GGT)levels before and after the patho?gen treatment in patients with subclinical schistosomiasis,and explore its clinical value in the diagnosis and treatment of sub?clinical schistosomiasis. Methods Totally 109 patients with subclinical schistosomiasis,who were found in the endemic inves?tigation of schistosomiasis in Ezhou City,were selected as the investigation subjects,and then they were treated with praziquan?tel. The serum GGT levels of the subjects before and after the treatment were detected and compared. Results Before the treat?ment,the average value of the GGT levels of the 109 patients was(48.1 ± 45.9)IU/L,among which,the GGT levels of 69 cases (63.3%)were normal,and the levels of 40 cases(36.7%)were increased. After the treatment,the average GGT level of the pa?tients was(32.1 ± 23.4)IU/L,which decreased by 33.3%comparing with that before the treatment,and the difference had a statistical significance(U=2.17,P=0.01). The GGT levels of 65 patients decreased in different degrees. Among the 40 pa?tients whose GGT levels had increased before the treatment,the GGT levels of 31 ones returned to the normal. Conclusion The GGT level detection can accurately reflect the liver function in the patients with subclinical schistosomiasis ,and also it has certain clinical application value to judge the liver function damage and recovery of the patients before and after the pathogen treatment.

A study of Adenosine Deaminase and Gamma Glutamyl Transpeptidase in Acute Pancreatitis.

Background: Acute pancreatitis is an important cause of morbidity and mortality worldwide. Alcohol and gallstone disease remain the commonest causes of acute pancreatitis but metabolic abnormalities, obesity and genetic susceptibility are thought to be increasingly important etiological factors. Serum enzymes amylases and lipase are used as conventional biomarkers of acute pancreatitis. Objectives: To assay serum enzymes amylase, lipase, adenosine deaminase (ADA) and gamma glutamyl transpeptidase (GGT) in acute pancreatitis of alcoholic and non-alcoholic etiology. The present study also aimed to find the correlation among the enzymes. Materials and methods: The study subjects were categorized as non-alcoholic acute pancreatitis (n=30), alcoholic acute pancreatitis (n=30) and healthy controls (n=30). Levels of amylase, lipase, adenosine deaminase and gamma glutamyl transpeptidase were estimated in serum samples by standard spectrophotometric methods. Results: The levels of amylase, lipase, ADA and GGT were significantly higher in acute pancreatitis patients than controls. With respect to amylase and lipase, more pronounced increase was seen in nonalcoholic than the alcoholic acute pancreatitis patients. Increase in GGT was more in alcoholic acute pancreatitis while increase in ADA was comparable in acute pancreatitis of alcoholic and non- Yerrajwala KS, Saradhini V, Reddy BR, Gudimella S. A study of Adenosine Deaminase and Gamma Glutamyl Transpeptidase in Acute Pancreatitis. IAIM, 2016; 3(3): 162-167. Page 163 alcoholic etiologies. Serum amylase showed significant positive correlation with lipase, GGT and ADA in alcoholic acute pancreatitis and with lipase in non-alcoholic acute pancreatitis. Conclusion: Serum levels of enzymes amylase, lipase, ADA and GGT served sensitive markers of acute pancreatitis. Future studies employing larger sample size and differentiating various etiologies of acute pancreatitis, findings correlation among enzyme biomarkers are required.

Gama-glutamil transpeptidase urinária como indicador de insuficiência renal aguda induzida por gentamicina em cães / Gama glutamil transpeptidase urinaria como indicador de insuficiencia renal aguda inducida por gentamicina en perros / Urinary gamma-glutamyl transpeptidase as an indicator of acute renal failure induced by gentamicin in dogs

Com o objetivo de avaliar a atividade da enzima gama-glutamil transpeptidase urinária (GGT) no diagnóstico da insuficiência renal aguda (IRA) induzida pelo uso da gentamicina, em comparação com a avaliação da urinálise e dos níveis séricos de uréia e creatinina, foram estudados 11 cães, machos, adultos, hígidos, sem definição racial e submetidos à administração de gentamicina em dose nefrotóxica, até o estabelecimento de azotemia, sendo avaliados diariamente com exames físicos e laboratoriais. Os resultados demonstraram que a atividade da enzima GGT urinária revelou elevação significativa após quatro dias da aplicação da gentamicina, enquanto os níveis séricos de uréia e creatinina elevaram-se significativamente após sete dias. Alterações de urinálise foram concomitantes ou ligeiramente tardias (cinco dias) às alterações da GGT urinária. Estes resultados demonstram que a GGT é um indicador confiável e precoce da insuficiência renal aguda induzida por gentamicina em cães

This study assesses the urinary gamma-glutamyl transpeptidase (GGT) activity as a diagnostic indicator of acute gentamicin-induced renal failure (AGIRF) in relation to urinalysis assessment and the levels of serum urea and creatinine. Eleven adult, male, healthy, mongrel dogs were administered with nefrotoxic doses of gentamicin until azotemy, which was detected by daily physical and laboratory exams. Urinary GGT was significantly increased after a 4-day gentamicin administration, while serum urea and creatinine levels significantly increased after 7 days. Urinalysis changes occurred concomitantly or slightly after (5 days) GGT increase. These results support that urinary GGT is a reliable and early indicator of acute renal failure induced by gentamicin in dogs

Con el objetivo de evaluar la actividad de la enzima gama glutamil transpeptidase urinaria (GGT) en El diagnostico de la insuficiencia renal aguda (IRA) inducida por el uso de la gentamicina, en comparación con la evaluación de la orinase y de los niveles séricos de la urea y creatinina, fueron estudiados 11 perros, machos, adultos, sanos, sin definición de raza y sometidos a la administración de gentamicina en dosis nefrotóxica, hasta el establecimiento de azotemia, siendo evaluados diariamente con exámenes físicos y de laboratorio. Los resultados demostraron que la actividad de la enzima GGT urinaria reveló elevación significativa después de cuatro días de la aplicación de la gentamicina, mientras los niveles séricos de urea y creatinina alzaron significativamente después de siete días. Alteraciones de orinase fueron concomitantes o ligeramente tardías (cinco días) las alteraciones de la GGT urinaria. Los resultados demostraron que la GGT es un indicador precoz y confiable de la insuficiencia renal aguda inducida por gentamicina en perros

Stereological Analysis of gamma-Glutamyl Transpeptidase Positive Foci in Diethylnitrosamine-Induced Hepatocarcinogenesis of Sprague-Dawley Rats / 대한간학회지

BACKGROUND/AIMS: Hepatocarcinogenesis of microscopically altered foci could be shown to be progressed into a trabecular pattern of hepatocellular carcinoma. And it is reported that down-regulation of TGF beta II receptor and up-regulation of TGF alpha and c-myc reveal the progression of diethylnitrosamine-induced foci into liver cell cancer. Up-regulation of TGF beta II receptor, however, causes apoptosis of foci. To determine characteristic morphology and growth kinetics of putatively precancerous y glutamyl transpeptidase (GGT) positive foci and hyperplastic nodules, a stereological quantification was attempted in the Peraino's neonatal rat model initiated by diethylnitrosamine and promoted by phenobarbital. MATERIALS/METHODS: Fifteen Sprague-Dawley rats were I.p. injected with 0.15 pmole/g of body weight of diethylnitrosamine mixed in corn oil at one day after birth. From weaning at 4 weeks of life, the rats were continuously fed 0.035% phenobarbital in drinking water and sacrified 5 rats at each time point of 8 weeks, 16 weeks, and 32 weeks. Teklad standard diet was fed after weaning. The livers obtained were fixed in freshly prepared, cold ethanol-acetic acid (99:1 vo1%). For the GGT histochemical staining, Rutenberg's method was modified, and counterstained with H & E or toluidine blue. For the stereological analysis GGT positive foci and nodules were traced in 200 consecutive tissue sections and quantified the 3 dimensional volumes by computer assisted planimetry. Either spheroidal or non-spheroidal morphology was determined by parabola 2nd degree equation ' y=ax+bx+c (sphere a=-P,). RESULTS: Thirty nine (55.71%) out of 70 representative lesions were nonspheroidal. Especially at 8 weeks, the 28 out of 40 GGT positive foci were irregular, nonspheroidal shape. Later times, however, GGT positive foci and reprogrammed nodular lesions were become spheroidal. Lilliefors probabilities test for spheroidal frequency was statistically significant (p<0.05). CONCLUSION: Stereologically non-spheroidal characteristics of the early GGT positive foci limit growth kinetic estimation by 3 dimensional volume quantitation but permit in later times in spheroidal, GGT positive foci and reprogrammed nodules showing fade-out of GGT activity. In other words, GGT positive foci may be clonally selected for growing into hyperplastic nodules and hepatocellular carcinoma or regressed by apoptosis.

Atividade da gama glutamil transpeptidase urinária, dosagens séricas de uréia e creatinina como meios diagnósticos auxiliares na nefrotoxicidade induzida por aminoglicosídeo em cães / Urinary gamma glutamyl transpeptidase activity, urinalysis, bun and creatinine serum dosages as a auxiliary diagnostic mean in dogs nephrotoxicity induced by aminoglycosides

Foram utilizados 11 cães, hígidos, com idade entre 1 e 5 anos. Inicialmente procedeu-se à determinação dos valores basais através de cinco colheitas diárias de urina e sangue, e realizou-se a urinálise, determinação da atividade da gama glutamil transpeptidase urinária, dosagens sérica de uréia e creatinina. A nefrotoxicidade foi induzida com a utilização de10mg/kg de gentamicina, 3 vezes ao dia, durante 14 dias. As colheitas de urina foram realizadas a cada 24 hors e o sangue foi colhido a cada 48 horas, durante 14 dias. Após este período os cães foram submetidos à eutanásia, procedendo-se à necropsia, e estudo histopatológico dos rins. Os sinais clínicos apresentados foram apatia, anorexia, poliúria, oligúria, anúria, polidipsia, vômito e diarréia. Pela urinálise observou-se a ocorrência de proteinúria, glicosúria, hematúria, cilindrúria, celulúria e isostenúria; os valores de gama glutamil transpeptidase urinária elevaram-se de forma crescente a partir de 24 horas de administração da gentamicina até o final do experimento, a azotemia foi observada no 12° e 14° dias da pesquisa. Na avaliação histopatológica observou-se nefrose tubular aguda. Com base nos resultados obtidos pode-se concluir que a mensuração da atividade da gama glutamil transpeptidase urinária é um sensível indicador de lesão tubular renal possibilitando o diagnóstico precoce, juntamente com a urinálise.

Eleven healthy dogs, ranging from one to five years old, were used for this study. Base line values were determined through five daily samples of urine for urinalysis and urinary gamma glutamyl transpeptidase activity, and blood for serum dosage of BUN and creatinine. Nephrotoxicity was induced using 10mg/kg of gentamicin, 3 times a day (tid), for 14 days. Urine samples were drawn every 24 hours and blood samples every 48 hours, for 14 days. After this period, the dogs were euthanized and necropsy was done for further histopathologic study. The clinical signs shown by the dogs were lethargy, anorexy, polyuria, oliguria, anuria, polydypsia, vomiting and diarrhea. Urinalysis findings were proteinuria, glucosuria, hematuria, cilindruria, celluria and decrease of urinary specific gravity and crescent values of urinary gamma glutamyl transpeptidase from 24 hours after gentamicin administration until the "end of" the experiment. Azotemia was noticed on the 12th and 14th days of the study. Acute tubular nephrosis was established in the histological evaluation. Based on the results found on this study, the measurement of the urinary gamma glutamyl transpeptidase activity might be considered a sensitive indicator of renal tubular damage allowing early diagnosis of the lesion.

Induction of Rat Liver gamma-Glutamyl Transpeptidase by Bile Acid Load / 대한간학회지

BACKGROUND/AIMS: In order to elucidate the possible mechanism of increase of y-glutamyl transpeptidase (y-GTP) activity in cholestatic liver and serum was studied. METHOD: Rats were divided into eight groups: Normal, sham operated control, bile duct obstruction (BDO) alone (BDO group), BDO plus taurocholic acid (TCA) injection (BDO plus TCA group), BDO plus tauroursodeoxycholic acid (TUDCA) injection (BDO plus TUDCA group), choledoco-caval shunt (CCS) operation (CCS groups), CCS plus TCA injection (CCS plus TCA group), and CCS plus TUDCA injection (CCS plus TUDCA group). Y-GTP activity was determined in the serum and liver cytosolic, mitochondrial and microsomal preparations isolated from above experimental rats. The values of Km and Vmax in this hepatic enzyme was measured. RESULT: the activities of liver cytosolic and microsomal y-GTP showed a significant increase in the CCS group. The activities of liver cytosolic, mitochondrial and microsomal y-GTP showed a significant increase in the BDO group. And the activity of serum y-GTP showed a marked increase in teth CCS and BDO poups. However, y-GTP activities in the serum and in liver microsomal prepatation rose more rapidly in the BDO group tban CCS. Y-GTP activity in liver cytosolic and microsomal preparatians, and its Vmax value incmmxl significantly in both CCS plus TCA group, and BDO plus TCA group than each control group, such as CCS and BDO group. On the other hand, the values of Km of the hepatic subcellular y-GTP did not change in the all experimental groups. Sennn y-GTP activity increased significantly in both CCS plus 7CA group, and BDO plus TCA group than each control group. However, these serum and hepatic enzyme activities did not change in both CCS plus TUDCA group and BDO plus TUDCA group. CONCLUSIONS: The above results suggest that 7CA stimulates biosynthesis of the y-GTP in the liver. And the elevations of the serum enzymes activity thought to be caused by increase of hepatocyte membrane permeability by a physical property (detergency) of TCA, which cause the enzyme to leak into the blood in large quantities.

The Change of Glutathione Content in the Placenta of Patients with Pregnancy-induced Hypertension / 대한산부인과학회잡지

Glutathione has a key role in several detoxification reactions and in the protection against injury caused by reactive oxygens. Pregnancy-induced hypertension(PIH) is associated with endothelial cell dysfunction. Such dysfunction could be caused by oxidative stress. There is evidence of increased activity of free radicals in PIH, but little is known about the part played by changes in specific antioxidants. In this study, the changes of glutathione levels were investigated in blood of patients with PIH, and cord blood of these patients was also investigated. The glutathione levels in cord blood of neonates from hypertensive pregnant women were significantly higher than in cord blood from normotensive pregnant women. The changes of gamma-glutamuylcysteine synthetase and of glutathione s-transferase in placenta were not significant, but gamma-glutamyl transpeptidase activity increased significantly in placenta of hypertensive pregnant women. These results suggest that the increased glutathione in cord blood of patients with PIH may be due to increased glutathione interorgan transport resulting from incerased activity of the placenta gamma-glutamyl transpeptidase.

COMBINED ASSAY OF SERUM TUMOR ENZYME MARKERS IN THE DIAGNOSIS OF HEPATOCELLULAR CARCINOMA / 重庆医科大学学报

FDP/FIP (88.8%), respectively; (3) The diagnostic positivity of combination assay was 80.0% in low or negative AFP producing HCC, while 95.7% in those with elevated AFP. Our data suggested that the combination assay of serum tumor enzyme markers was valuable in the diagnosis of HCC, especially in low or negative AFP HCC patients

Serum gamma-glutamyl transpeptidase and alkaline phosphatase activities in normal and hepatic disorders.

Serum gamma-glutamyl transpeptidase (gamma-glutamyl transferase EC 2.3.2.2) and alkaline phosphatase (EC 3.1.3.1) activities from 115 adults with various hepatic diseases were compared to 200 normal adults. Although the values of both enzymes are significantly above normal in the same liver disorders, the first enzyme is much more sensitive in liver cirrhosis. The two enzymes are correlated very well (r = 0.648, p < 0.0005) in hepatic patients.