[Thyroid dysfunctions in patients with viral hepatitis treated with interferon-alpha].
ABSTRACT Many studies have explored that thyroid dysfunctions can be induced by cytokine therapy. Most observations were collected in connection with the treatment of viral hepatitis with interferon-alpha.
Frequency and types of thyroid dysfunction developed during and after recombinant interferon-alpha treatment were studied in 138 patients with viral hepatitis C or B. Therapy lasted 12 months or more, subjects having thyroid dysfunction at the start of therapy were excluded from the study. Thyroid parameters (TSH, FT4, FT3 and anti-TPO) were controlled every third month. In patients in whom thyroid dysfunction occurred the measurements were repeated monthly and other tests were also performed (anti-Tg, IL-6, TSH receptor antibody, thyroid scan and 99mTc-pertechnetate uptake).
Thyroid function disturbances were found in 30 (21.7%) patients, 12 of them (8.7%) showed persistent hypothyroidism. Hyperthyroidism was transitory in all cases. The clinical course of thyroid dysfunction might be monophasic (hyper- or hypothyroidism), biphasic (hyperthyroidism followed by hypofunction) or triphasic. Immune and non-immune forms can be clearly distinguished.
Every fifth patient with chronic hepatitis showed thyroid dysfunction during interferon-alpha therapy, it is necessary therefore to control the hormonal status and the thyroid antibody titer. Treated patients have to be informed in advance that as a "side effect" persistent hypothyroidism may develop.
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ABSTRACT: To determine the frequency of thyroid dysfunction in patients of chronic hepatitis C during treatment with interferon alpha-2b and ribavirin therapy. A cohort study. Army Medical College and Military Hospital, Rawalpindi, from February 2006 to January 2007. One hundred and sixty seven non-cirrhotic chronic hepatitis C patients were grouped into treatment group (n=107) and control group (n=60) awaiting treatment. Baseline serum(s.) Alanine Transferase (ALT) and S. Aspartate Transferase (AST) were measured by IFCC method. Serum Thyroid Stimulating Hormone (S. TSH), serum free thyroxine (S. Free T4) and serum total triiodothyronine (S.T3) level were determined by chemiluminescence. Study group patients underwent 24 weeks IFN and ribavirin therapy and were followed-up for thyroid dysfunction at weeks 0, 12 and 24. Control group patients underwent the same tests at weeks 0, 12 and 24. Statistical analysis was done on SPSS 15. Out of 107 patients of treatment group, 20 patients (18.69%) developed thyroid dysfunction. Females were at higher risk with Relative Risk (RR) of 11.25 and Attributable Risk (AR) of 91%. Hypothyroidism was more common than hyperthyroidism. Interferon-alpha and ribavirin therapy induces thyroid dysfunction in chronic hepatitis C patients. Hypothyroidism was more common. Females are at a higher risk of developing thyroid dysfunction.Journal of the College of Physicians and Surgeons--Pakistan: JCPSP 03/2009; 19(2):86-9. · 0.30 Impact Factor
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ABSTRACT: Ulcerative colitis (UC) is an immune disorder of the gastrointestinal tract which has been reported to be precipitated by interferon (IFN) therapy. We describe the results of a literature review of cases in which the development or exacerbation of UC was coincident with IFN and/or ribavirin (RIB) treatment for chronic hepatitis C. We summarized the studies on the effectiveness of IFN for UC or Crohn's disease, which were primarily carried out in Europe and the USA. In the nine reported cases of UC exacerbation by IFN therapy in Japan, seven involved IFN-α, one involved IFN-α2b plus RIB, and the other involved IFN-β; thus cases induced by IFN-α were more common. The period between the initiation of IFN treatment and the development or exacerbation of UC varied widely among the reported cases (from 1 day to 4.5 years). The reports have all assumed a cause-and-effect correlation between IFN treatment and UC. However, although combination therapy of IFN and RIB has become widespread in Japan, UC development or exacerbation induced by IFN has not increased concurrently. Conversely, numerous studies reporting the effectiveness of IFN for treating UC and Crohn's disease have been published in Europe and the USA. One reason for this finding may be the difference in the balance of T helper cell 1 and T helper cell 2 between populations.Journal of Gastroenterology and Hepatology 12/2011; 26(12):1709-16. · 3.33 Impact Factor
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ABSTRACT: OBJECTIVE: To investigate the prevalence of thyroid dysfunction (TD) and immunoglobulin G (IgG) subclasses of thyroid autoantibodies (TAs), and to determine the predictive factors of TD in chronic hepatitis C (CHC) patients. DESIGN: Three hundred and twelve (312) untreated hepatitis C virus-infected patients without a history of TD or treatment with thyroid hormones were enrolled in a cross-sectional study. Clinical and biological factors were statistically analyzed to determine the correlation between TD and this patient population. RESULTS: The incidence of TD was 12.5% in CHC patients. Clinical hypothyroidism (5.8%) and subclinical hypothyroidism (3.8%) were more frequent than clinical hyperthyroidism (1.6%) and subclinical hyperthyroidism (1.3%). The percentage of TAs positive patients was significantly higher in people >60 than in those <=60 (31.9% vs 18.6%; P=0.042). Positive thyroid peroxidase antibody (TPOAb) was more frequent and ALT levels were lower in patients who displayed TD (TPOAb: 62.1% vs 10.8%, P=0.000; ALT: 43.5IU/L vs 51IU/L, P=0.046). The positive percentage of TPOAb IgG2 subclass in TD group was significantly higher than that of patients without TD (66.7% vs 16.7%, P=0.005). Multiple logistic regression analysis indicated that only TPOAb IgG2 subclass positivity was an independent risk factor for TD in CHC patients (odds ratio=8; 95% confidence interval: 1.225-52.246; P=0.030). CONCLUSIONS: TPOAb IgG2 subclass positivity is a risk factor for TD in CHC patients before antiviral treatment. IgG2 subclass of TPOAb might play an important role in the presence of TD in CHC patients.European Journal of Endocrinology 02/2013; · 3.14 Impact Factor