Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: UMLS:C0019158 (hepatitis)
 30,205 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

To determine the anabolic effectiveness of nitrous preparations for the parenteral alimentation an urea increment rate in normal albino rats and in the ones with parenchymatous hepatitis was used. With subcutaneous introduction of nitrous preparations moriamine S-2, aminosol, polyamine and of an improved caseine hydrolysate the level of the blood urea was found to attain the maximum in 6 hours. With toxic lesion of the liver the ureogenic function remains intact and, for this reason, this test may be used for assessing the anabolic effectiveness of the preparations with a changed functional state of the liver in different pathological conditions. The urea increment rate may be recommended for determining the biological value of the preparations for nitrogenous parenteral alimentation.
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PMID:[Possibility of using the urea increment index for assessing the anabolic effectiveness of parenteral nitrogen feeding in toxic hepatitis]. 10 74

A mixture with essential and nonessential amino acids high in branched chain amino acids and low in aromatic amino acids (Fischer solution), and another synthetic mixture of branched chain amino acids containing 3 amino acids associated with the urea cycle (Hep-OU) were infused to control subjects and patients with severe hepatic disease. Alterations in serum aminograms, blood ammonia levels and electroencephalograms following the infusion were studied and compared with those obtained by a commercially available amino acid mixture. Short-term or continuous infusion of a commercially available amino acid solution to cirrhotic patients caused an increase in methionine, phenylalanine and tyrosine and a decrease in branched chain amino acids. These post-infusion results were similar to the patterns seen in hepatic encephalopathy. In cirrhotic patients, infusion of Fischer solution which contains small quantities of methionine and phenylalanine produced an increase in the concentrations of these 2 amino acids, probably because of impaired utilization by the injured liver. No marked alterations in serum aminograms, however, were observed in cirrhotic patients either immediately after, or 3 h after, the end of the Hep-OU infusion. Reduction of methionine, tyrosine and phenylalanine levels and elevation of the molar ratio of (valine + leucine + isoleucine)/(phenylalanine + tyrosine) were significant. The infusion of Hep-OU to patients with liver cirrhosis or subacute hepatitis resulted in clinical and neurological improvements and the restoration of the molar ratio of branched chain amino acids/aromatic amino acids.
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PMID:An approach to nutritional therapy of hepatic encephalopathy by normalization of deranged amino acid patterns in serum. 15 28

The concentrations of total free amino acids, single free amino acids, urea, and ammonia were determined in plasma of mice during experimental infection with the MHV-3 strain of mouse hepatitis virus. Analysis of free amino acids was done by ion-exchange resin chromatography under conditions that allowed the use of a single chromatographic column, separation of glutamine and asparagine, and an accelerated rate of chromatography. The results showed that as early as 6 hr after infection there was a decrease in the concentration of several free amino acids as well as in the total concentration of free amino acids in plasma. For most of the amino acids the decrease persisted until 48 hr. Only at 72 hr, during severe cytolysis, did the concentration of amino acids increase significantly. It is suggested that the decrease during the initial phases of the infection may be due to a thermolabile factor that is produced by circulating leukocytes and that effects a flow of free amino acids from the plasma toward the liver. The final increase in concentration of several free amino acids reflects the cytolytic damage to the liver caused by the virus.
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PMID:Free amino acids in plasma during experimental infection of mice with the MHV-3 strain of mouse hepatitis virus. 19 86

Virus particles banding at 1.34 g/ml in CsCl and sedimenting at 160S in sucrose gradients were isolated from fecal specimens of patients suffering from hepatitis. In the presence of 4 M urea and about 90% formamide, these particles released linear nucleic acid molecules of the kinked appearance characteristic of single-stranded RNA or single-stranded DNA. They could be distinguished from the nucleic acid of phage lambda added to the preparation as a marker for double-stranded configuration. Experiments in which the virus particles under investigation were incubated at pH 12.9 at 50 degrees C for 30 min revealed that their nucleic acid molecules were hydrolyzed as readily as the RNA genome of poliovirus type 2 analyzed in parallel. Both the single-stranded DNA of phage phiX174 and that of parvovirus LuIII, however, proved unaffected by this treatment, and the double-stranded DNA of phage lambda was denatured to single-stranded molecules. It was concluded, therefore, that the virus of human hepatitis A contains a linear genome of single-stranded RNA and has to be classified with the picornaviruses.
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PMID:Characterization and classification of virus particles associated with hepatitis A. II. Type and configuration of nucleic acid. 20 31

The activities of urea-cycle enzymes were measured in liver biopsies of patients suffering from chronic-persistent hepatitis (CPH), chronic-active hepatitis (CAH) and liver cirrhosis. Most of the activities of urea-cycle enzymes did not differ in the case of CPH as compared to controls. Chronic-active hepatitis and liver cirrhosis are associated with a significant (p less than 0.05) decrease of enzyme activity as compared to normal persons. Most of the urea-cycle enzymes are significantly decreased in patients with CAH in comparison with CPH. No significant differences can be demonstrated in the case of CAH as compared to patients with complete cirrhosis. In conclusion, progression of chronic liver disease is associated with increasing alterations of enzyme activities catalyzing a liver specific metabolic pathway. The decrease of the activities of the key enzymes of the urea cycle (Carbamylphosphate-Synthetase and Arginino-succinate-Synthetase) is nearly identical both in CAH and liver cirhosis, although CAH may be a reversible disease. Therefore, marked alterations in the metabolic pathway of ammonia detoxification seem to preceed the histological manifestation of irreversible liver damage.
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PMID:Activities of urea-cycle enzymes in chronic liver disease. 22 5

The nitrogen metabolism in rats with toxic affection of the liver caused by administration of CCl4 was studied as affected by the amino acid mixture moriamine S-2. It is established that with toxic hepatitis the nitrogen metabolism is sharply disturbed, especially during protein deficiency. The following evidences for this fact: a rise in the depth of the nitrogen negative balance, an increase in the intensity of amine nitrogen and ammonia excretion with urea as well as an increase in the amount of amine nitrogen in blood and tissues with a simultaneous decrease in the content of protein. The parenteral administration of the amino acid mixture for eight days to the animals with a toxic affection of the liver is more effective when nitrogen preparation is combined with the group B vitamin, vitamin C, insulin, nerobolyl and sirepar.
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PMID:[Correction of nitrogen metabolism in rats with toxic hepatitis by parenteral administration of an amino acid mixture]. 42 34

Ammonia toxicity and the protective effect of arginine thereon were investigated in rats after single and repeated doses of galactosamine. Urea cycle enzymes and ornithine-oxo-acid transaminase activities were measured in rat liver homogenates. Ammonium acetate proved to be less toxic in rats treated with single or repeated doses of galactosamine than in untreated animals. Urea cycle enzyme activities of galactosamine-treated rats were clearly lowered. The protective effect of arginine against lethal ammonia intoxication was found in animals that had been treated with galactosamine as well as in untreated rats. Since the toxicity of ammonium acetate is lower in rats with galactosamine hepatitis, in which the activities of the liver urea cycle enzymes are reduced, it seems likely that ammonia detoxication in galactosamine-poisoned rat liver partly bypasses the urea cycle.
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PMID:[Toxicity of ammonium acetate in rats with acute and subacute galactosamine-induced hepatitis (author's transl)]. 76 43

Disordered gustatory acuity was demonstrated in 22 patients with acute viral hepatitis and in 16 patients with chronic liver disease utilizing subjective responses and objective measurements of detection and recognition thresholds and scaling for NaCl, sucrose, HCl, and urea. In patients with early hepatitis and those with chronic liver disease, the magnitude and the uniformity of the threshold elevations were comparable, implying that disordered gustatory acuity reflects disordered hepatic function per se. Patients with acute hepatitis showed a significant fall in taste thresholds (improvement in acuity) as the hepatitis waned, indicating that the gustatory defect is reversible. This disorder of gustatory acuity may contribute to the anorexia commonly found in patients with liver disease.
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PMID:Disordered gustatory acuity in liver disease. 125 40

The recent cloning of the genome of a parenterally transmitted non-A, non-B hepatitis virus, designated the hepatitis C virus (HCV), has been used for the development of an enzyme immunoassay for the detection of antibodies against HCV (anti-HCV). We have employed this assay to evaluate the prevalence of HCV antibodies in hospital personnel and voluntary blood donors. Twelve of 1018 sera (1.2 percent) from health care workers were repeatedly reactive in the enzyme immunoassay for anti-HCV. Specificity testing with a modification of the enzyme immunoassay (additional wash cycle with 8 mol/l urea) and a recombinant immunoblot assay demonstrated HCV antibodies in only 6 of the 12 sera. Thus, the true prevalence of anti-HCV in hospital personnel was 0.6 percent. Nine of 1046 sera (0.9 percent) from blood donors were reactive in the enzyme immunoassay for anti-HCV. In none of the 9 sera the presence of HCV antibodies could be confirmed by additional testing with the urea wash modification or the recombinant immunoblot assay. The true prevalence of anti-HCV in blood donors thus appears to be lower than 0.1 percent. Our results indicate that the risk of HCV transmission in the hospital setting appears to be low, but is significantly higher than that of the general population.
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PMID:[Prevalence of hepatitis C virus antibodies in hospital personnel and the general population]. 171 67

The two sequences that define the self-cleaving elements from the genomic and antigenomic RNA of hepatitis delta virus were folded into secondary structures with similar features. Evidence in support of the two models was obtained from limited ribonuclease digestion of genomic and antigenomic RNA fragments containing the sequence 3' of the cleavage site. Under conditions where the rates of self-cleavage are enhanced by addition of 5 M urea (2-10 mM Mg2+ at 37 degrees C), ribonucleases T1, U2, A and V1 generated digestion patterns consistent with the proposed RNA structures. The evidence for a relatively stable structure in urea when Mg2+ is present suggests that denaturant-enhanced rates of self-cleavage could result from destabilization of competing inactive structures.
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PMID:Evidence that genomic and antigenomic RNA self-cleaving elements from hepatitis delta virus have similar secondary structures. 192 26


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