Gene/Protein Disease Symptom Drug Enzyme Compound
Pivot Concepts: Gene/Protein Disease Symptom Drug Enzyme Compound   Target Concepts: Gene/Protein Disease Symptom Drug Enzyme Compound

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Query: EC:2.6.1.2 (alanine aminotransferase)
26,722 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

Post-transfusion hepatitis (PTH) is a major problem in patients with acute leukemias requiring blood products during induction or consolidation therapy. In fact, PTH causes delays of chemotherapy with major violations in the timing of protocols. In order to assess the efficacy and safety of a short course of alpha-interferon (alpha-IFN) in inducing early remission of PTH, we treated seven patients who developed acute hepatitis during a post-remissional phase of AML. Patients received 3 MU of alpha-IFN i.m. three times weekly for one month. One patient stopped alpha-IFN at 2 weeks because of severe itching, after ALT normalization. Five out of 6 subjects normalized ALT within a mean time of two weeks. Minor side effects were observed in 2 cases. Three patients relapsed within eight weeks after stopping alpha-IFN. They underwent a second remission upon treatment with the same schedule. All patients continued their treatment protocol for AML without delay.
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PMID:Recombinant interferon alpha-2B for acute post-transfusion hepatitis in acute myeloid leukemia. 180 50

Chronic delta hepatitis is a severe disease with a rapidly progressive course for which currently no effective treatment exists. Treatment with alpha-interferon (alpha-IFN) can inhibit HDV replication and improve serum chemistries in a number of patients. Meta-analysis of five randomized controlled trials using at least 5 MU/m2 of alpha-IFN t.i.w. for a minimum of 3 months showed that alpha-IFN had a statistically significant effect in normalizing ALT values during therapy at a p level of less than 0.001, with a 10.24 odds ratio and a 28.69% risk difference (Mantel-Haentzel-Peto chi 2 = 24.13) but had no significant effect on ALT activity after its discontinuation. From hitherto available results, it appears that the best treatment schedule is a 5 MU standard dose of alpha-IFN given daily (QD) or 9 MU t.i.w. for at least 1 year, which is associated with a remission of the disease in 50-70% of patients. A trial conducted in Greece showed that the mean duration of disease remission under alpha-IFN therapy was 3.8 months per year compared to 1.7 months per year of non-treatment (relative risk = 2.8). Unlike hepatitis B, no factors predictive of the response to alpha-IFN therapy have been identified except, perhaps, for the duration of the disease. No adjuvants have been found to enhance the efficacy of alpha-IFN treatment and no therapeutic alternatives are available at present. Advances in understanding HDV replication and the pathogenetic mechanisms in chronic delta hepatitis may bring about significant improvement in its therapy in the future.
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PMID:Use of alpha-interferon in the treatment of chronic delta hepatitis. 183 31

IFN-alpha was administered intermittently over a 6 month period in 39 patients with chronic non-A, non-B hepatitis confirmed by peritoneoscopy and liver biopsy. Three million units of IFN-alpha were administered 3 times a week for the first 6 months then twice, then once a week. In 26 patients (67%), GPT decreased and remained within the normal range during the course of administration, and in 9 patients (23%) GPT remained normal for over 6 months after the discontinuation of IFN-alpha. There was no significant difference of efficacy among 3 groups liver histology groups (CPH, CAH-2A, and CAH-2B), but GPT decreased significantly in patients with sporadic hepatitis compared to patients with a history of blood transfusion. Furthermore, GPT decreased significantly in patients with a history of a blood transfusion within the preceding 2 years compared to patients with a history of a blood transfusion over 7 years ago. GPT increased markedly after an early tapering to 2 doses weekly, but it did not increase after a 6 month administration. In conclusion, the long-term administration of 300 million unit IFN-alpha, 3 times weekly for 6 months, about 2.5 hundred million units in total, is thought to be an effective way to control chronic NANB hepatitis.
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PMID:Long-term intermittent administration of interferon-alpha in patients with chronic non-A, non-B hepatitis. 190 37

We treated 41 chronic hepatitis C patients with recombinant interferon alpha 2a, 6 X 10(6) IU/day, for three weeks daily followed by intermittent therapy, 3 X 10(6) IU/day, three times weekly for 6 months and more. After 6 months of intermittent therapy, serum aminotransferases (AST, ALT) decreased to normal or nearly normal levels in 29 of 41 patients (70.7%) with histological improvement. The HCV (C100-3) antibody disappeared during and after IFN therapy in 7 of 34 HCV antibody positive patients (20.6%). Serum aminotransferases levels of all such patients were normalized or nearly normalized. The IFN antibody was detected in 8 of 41 patients (19.5%) including one whose IFN antibody was already present before starting IFN therapy. IFN treatment was discontinued in 22 of 41 patients (53.7%) because they responded completely or nearly completely to IFN therapy. All of the 22 patients have been maintaining normal aminotransferase levels for 1 to 24 months (mean, 12 months) after the treatment period. We conclude that long-term IFN therapy is greatly beneficial in controlling hepatic inflammatory changes in chronic hepatitis C.
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PMID:[Clinical study on long-term treatment of chronic hepatitis C with interferon]. 190 7

Chronic liver disease associated with hepatitis C virus (HCV) is an important cause of morbidity and mortality in hemophilia. We have used recombinant interferon alpha-2b (IFN alpha-2b) in a randomized controlled liver biopsy trial to treat hemophiliacs with chronic hepatitis. Eighteen patients entered the study, 16 of whom were subsequently shown to have antibodies to the HCV. All underwent liver biopsy at entry and were randomized to either treatment with self-administered IFN alpha-2b, 3 million units subcutaneously thrice weekly (n = 10) or no treatment (control group) (n = 8). Nine subjects had chronic active hepatitis, seven had chronic persistent hepatitis, and two had cirrhosis. Twelve months after entry into the study 17 patients underwent a second liver biopsy. All biopsies were coded, assessed, and scored according to the histologic severity of the liver disease. Ten patients were administered IFN for 1 year, and in four patients normalization of alanine aminotransferase (ALT) occurred compared with none in the untreated group. After the second liver biopsy, six of the eight initial no-treatment patients were treated with interferon 3 million units thrice weekly for 6 months, and normalization of ALT was seen in five patients. Biochemical relapse within 4 months of stopping IFN occurred in one of four patients treated for 1 year and in four of five patients treated for 6 months. IFN treatment was well tolerated. Although the histologic scores of the two groups were similar at entry into the study, after 12 months the biopsy appearances in the treated group were significantly improved compared with the controls (P less than .01). Histologic improvement was noted in the three interferon-treated human immunodeficiency virus antibody-positive patients and also in other patients who had no biochemical response. We conclude that low-dose recombinant IFN alpha is effective in normalizing transaminases and improving the histologic appearances in at least 50% of hemophiliacs with chronic hepatitis C.
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PMID:A randomized controlled trial of recombinant interferon-alpha in chronic hepatitis C in hemophiliacs. 191 56

In a randomized controlled trial of recombinant alpha-2a interferon for chronic hepatitis B, interferon antibodies developed in 21 (39%) of 54 Chinese adults who received IFN. No correlation was observed between sex, age, pretreatment serum ALT level or liver histological findings and the development of interferon antibodies. Antibodies were significantly more likely to develop in patients who received lower doses (2.5 or 5 MU/m2) of alpha-2a interferon than in those who received a higher dose (10 MU/m2): 53% vs. 11% (p = 0.006). The development of interferon antibodies appeared to reverse the initial antiviral response to treatment, with reappearance of hepatitis B virus DNA in serum in 12 patients and HBeAg in three patients. Sustained clearance of HBeAg was achieved in only one (5%) patient but was achieved in seven (21%) patients without interferon antibodies. The mere presence of interferon antibodies did not preclude an antiviral response to interferon therapy, but patients with high titer neutralizing antibodies were less likely to respond. These findings suggest that interferon antibodies may negate the antiviral effects of alpha-2a interferon. A higher incidence of interferon antibodies in Chinese vs. white patients with chronic hepatitis B may contribute to the poorer antiviral response in Chinese patients.
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PMID:Interferon antibodies may negate the antiviral effects of recombinant alpha-interferon treatment in patients with chronic hepatitis B virus infection. 225 42

We measured activities of alpha- and gamma-interferon simultaneously in 198 sera of 70 patients with acute and chronic viral hepatitis using specific and sensitive enzyme immunoassay and immunoradiometric assay. The results were compared with those in patients with influenza and in healthy controls. Twelve out of 28 patients with acute viral hepatitis showed positive alpha-IFN and/or gamma-IFN activities. alpha-IFN was detectable throughout the clinical course while gamma-IFN levels rose in the convalescent phase regardless of etiology. Conversely, in patients with influenza, both alpha-IFN and gamma-IFN levels of initial samples tended to be higher than those of late samples. Six out of 12 patients with chronic active type B hepatitis showed increased alpha-IFN and/or gamma-IFN values during acute deterioration with marked elevation of serum alanine aminotransferase. However, the two interferons did not always appear simultaneously, although either was detectable in both acute and chronic hepatitis. Enhanced alpha-IFN or gamma-IFN activity was not found in asymptomatic chronic hepatitis B carriers or in patients with chronic persistent hepatitis and liver cirrhosis with chronic hepatitis B virus infection, with the exception of 2 cases. Our results indicated that circulating multiple IFN species were present during the clinical course in some patients with acute and chronic viral hepatitis.
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PMID:Serum levels of alpha-interferon and gamma-interferon in patients with acute and chronic viral hepatitis. 249 28

Thirty-five patients with active chronic hepatitis B (ACH-B) were evaluated. They were in stable replicative phase (HBeAg +; DNA polymerase and ALT stable in two determinations at least one month apart) and had not been infected by delta virus or HIV-1. Thirty-four patients were heterosexual and no patient was a drug abuser except one. The 23 initial cases were followed up for 15 months without therapy. The subsequent 12 cases were treated with maximal doses of 2.5 megaunits/m2 of lymphoblastoid alpha interferon (IFN-L) daily for two weeks and three times a week during 10 more weeks. While in the controls only two cases (8.69%) lost the DNA-polymerase activity and HBeAg, 5 treated patients (41.66%; p less than 0.05) developed seroconversion to nonreplicative phase. No patient from the control series lost the HBsAg; however, this happened in 2 treated patients (16.66%). These results show that IFN-L is effective in heterosexual patients with ACH-B in replicative phase without delta virus or HIV-I co-infection.
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PMID:[Treatment of chronic hepatitis B with lymphoblastoid alpha interferon]. 261 34

Thirty three heterosexual chronic hepatitis B virus (HBV) carriers were randomized, with stratification for disease activity, to receive intramuscular recombinant interferon alpha-2a (r-IFN) at doses of 4.5 megaunits thrice weekly for 4 months, or no treatment. During r-IFN treatment, serum HBV-DNA levels fell in all, but 2 patients. Final evaluation at 16 months after randomization revealed that the rate of complete response, i.e., loss of both HBV-DNA and HBeAg with ALT normalization was 22.2% (2 of 9 cases) in patients on interferon and 12.5% (1 of 8 cases) in untreated patients for the group with high serum alanine aminotransferase (ALT) and with piecemeal necrosis on liver biopsy on entry. The corresponding value was 25% (2 of 8 cases) in treated and 12.5% (1 of 8 cases) in untreated patients with low liver disease activity. Overall, a complete response was thus observed in 23.5% of treated patients and in 12.5% of controls. None of the patients on therapy became HBsAg negative. It is concluded that treatment of heterosexual patients with chronic hepatitis B with r-IFN in the dose regimen used here was not associated with a significant higher rate of serologic and clinical response compared to controls, independently of pretreatment biochemical and histologic activity of liver disease.
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PMID:Long-term effect of low dose recombinant interferon therapy in patients with chronic hepatitis B. 269 68

A 59-year-old male was admitted to our hospital with complaints of general fatigue, abdominal distension and edema in the legs in February, 1985. Laboratory findings were as follows: GOT 152 IU/l, GPT 129 IU/l, LDH 555 IU/l, ALP 1147 IU/l, gamma-GTP 413 IU/l, T.-Bil 2.1 mg/dl and AFP 422.6 ng/ml. Multiple SOLs were recognized in both lobes of the liver by abdominal CT scan and echography. Interferon-gamma (gamma-IFN: KW-2202; Kyowa Hakko Co.) therapy was started in March from an initial dose of 1 X 10(6) units and was increased up to 4 X 10(6) units, 2 X 10(6) units being administered as a maintenance therapy for 12 weeks. The tumors became remarkably smaller in size, AFP was decreased to 38.8 ng/ml, and PR was obtained. The only side effect was temporary fever. The patient was subsequently followed without gamma-IFN at an outpatient clinic for about 100 days, but finally died due to rupture of esophageal varices and hepatic failure.
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PMID:[A case of hepatoma with a remarkable response to gamma-interferon administration]. 301 53


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