Biomedical subjects

P Matucha

Publications and source records attributed to P Matucha.

8 recordsLinked to original sources

PubMed2006

[Autoimmune thyroiditis--selected etiopathogenic mechanisms].

Autoimmune thyroiditis occurs as organ specific autoimmune disease not only as an isolated impairment of thyroid gland, but also linked to many autoimmune endocrinopathies. Genetic predisposition in the area of HLA antigens was followed up by patients with autoimmune thyroiditis diagnosed in this way and it appeared that genetic predisposition in isolated autoimmune thyroiditis is different when compared to the occurrence linked to endocrine polyglandular disease. In selected groups of patients with autoimmune disease also the influence of extraneous factors on the development of the autoimmune process was followed up, namely the influence of heavy metals and the influence of infectious agent--Helicobacter pylori. These factors have a different character of activation of autoimmune thyroiditis too, depending on the character of its manifestation as isolated disorder or in link to autoimmune polyglandular syndrome type II, or in link to the group of polyglandular activation of autoimmunity. To conclude, this study leads to the assumption, that autoimmune thyroiditis is a set of clinical syndromes that depends on the activation of the autoimmune process, rather than a strictly genetically and epigenetically characterized nosological unit.

Adult↗

PubMed2004

Serum levels of IGF-I, HGF, TGFbeta1, bFGF and VEGF in thyroid gland tumors.

IGF-I, HGF, TGFbeta1, bFGF and VEGF are involved in the pathogenesis of thyroid gland tumors and their growth. We decided to find whether changes in the production of these cytokines by thyroid tumor cells are reflected by changes of their peripheral blood. Using ELISA kits, we measured the concentrations of growth factors in the peripheral blood serum in 28 patients with thyroid gland tumors (14 adenomas, 14 papillary carcinomas) and compared these concentrations with those in healthy people. We found significantly lower serum levels of IGF-I in patients with thyroid adenoma compared to the healthy population. Serum levels of HGF and bFGF were significantly higher in patients with thyroid adenoma and papillary carcinoma compared with those in healthy subjects. Serum concentrations of TGFbeta1 and VEGF were not significantly different in any groups of investigated subjects. Changes in the production of these cytokines by thyroid gland tumor cells are reflected in their peripheral blood levels, but these levels also depend on a number of other physiological and pathological processes in the organism. However, significant differences of HGF and bFGF serum levels can be explained by their very high production by thyroid tumor cells and by their strong effect on the follicular and endothelial cell proliferation.

Adenoma↗

PubMed2004

HLA antigen expression in autoimmune endocrinopathies.

The HLA allelic frequency was determined in three groups of autoimmune endocrinopathies: A) 30 patients with autoimmune thyroiditis, B) 20 patients with polyglandular activation of autoimmunity, and C) 10 patients with the autoimmune polyglandular syndrome type II. The groups were defined by the clinical state and serological parameters. Healthy blood donors of Caucasian population from the US database of HLA frequencies served as the controls. In group A, a higher occurrence of HLA-A24 (21.7 %) was found as compared to group B (5.0 %) and to the controls (8.5 %), of HLA-B27 (15.0 %) and of HLA-DR-11 (20 %) as compared to the controls (4.2 % and 8.5 %). In group B, a higher occurrence of HLA-A3 (25.0 %) was found as compared to group A (10 %) and to the controls (11.8 %), and of HLA-B8 (22.5 %) as compared to group A (8.3 %) and to the controls (8.6 %). In this group the occurrence of HLA-DR3 (30.0 %) was higher as compared to group A (10.0 %) and to the controls (9.8 %) and of HLA-B8 (30.0 %) as compared to group A (8.3 %) and to the controls (8.6 %). Genetic markers indicate a similarity of groups B and C. Patients in these groups could be at different stages of the same disease, however, some distinctions between them lead us to consider the possibility whether different epigenetic factors could extend the difference between these groups in the course of clinical development.

Adrenal Glands↗

PubMed2003

Comparison of cytokine levels in sera of patients with autoimmune endocrinopathies.

Autoimmune endocrinopathies can be divided according to the presence of organ specific autoantibodies and according to the clinical manifestations into isolated autoimmune endocrinopathies, autoimmune polyglandular syndromes (APS) and polyglandular activation of autoimmunity (PAA). Many factors take part in the development of the autoimmune disease: predominantly a genetic predisposition, environmental etiologic causes and dysregulation in the microenvironment of the target organ. Until now it is not completely clear, if manifestations of the clinical disease depend primarily upon external factors and the degree of regulation mechanism disorder (e.g. in Th1/Th2 regulation) or upon the different genetic predisposition. In this work we compared the levels of Th1 and Th2 lymphocyte cytokines in peripheral blood in three groups of patients: group A of 30 patients with autoimmune thyroiditis, group B of 25 patients with PAA, and group C of 10 patients with APS type II. From group of Th1 cytokines IL-2 and IFN-gamma were detected, whereas from group of Th2 cytokines IL-4 and IL-10 were determined by ELISA kit. We did not find any differences in the concentrations of IL-2, IFN-gamma, IL-4 and IL-10 among the groups of patients with autoimmune endocrinopathies.

Autoimmune Diseases↗

PubMed1999

[Reactions to metals in patients with chronic fatigue and autoimmune endocrinopathy].

Our study was designed to assess the effect of heavy metals on the severity of fatigue in autoimmune thyroid disease associated with autoantibodies against other endocrine organs. We compared our data with those obtained from other groups of patients. A total of five groups of patients were examined by their medical history, dental examination, and using a modified test of blast transformation of metals (Melisa): a) 10 fatigues female patients with autoimmune thyroidism and polyglandular activation of autoimmunity, b) 12 fatigued patients with autoimmune thyroidism, c) 28 fatigued patients free of endocrinopathy, d) 22 professionals without evidence of autoimmunity, e) 13 controls, a population sample, the individuals did not complain of marked fatigue and their laboratory tests did not show signs of autoimmunity and endocrinopathy. Fatigue regardless of the underlying disease is primarily associated with hypersensitivity to inorganic and organic mercury, nickel, and gold. The groups differed in their hypersensitivity to other metals. In the control group, hypersensitivity--mostly to cadmium and lead--was found in four of the examined individuals only. Statistical analysis of data obtained from professionals and controls revealed a higher incidence of positivity to organic and inorganic mercury and nickel in professionals.

Adult↗

PubMed1998

[The fatigue syndrome in autoimmune thyroiditis with polyglandular activation of autoimmunity].

The authors compared in a group of 118 patients with autoimmune thyroiditis and a positive antibody titre against ovaries the grade of fatigue with the presence of organ specific and non-specific autoantibodies in the peripheral blood stream, antibodies against EBV and CMV, immunoglobulin concentrations, biochemical parameters of the lipid metabolism, glucose tolerance, ion balance and melatonin and serotonin levels. Patients with autoimmune thyroiditis were differentiated according to the degree of fatigue into three groups: 38 with fatigue typical for CFS, 30 with occasional fatigue and 50 without the feeling of fatigue. Fatigue of the CSF type was characterized by a significantly higher incidence of autoantibodies against the adrenals and a higher cholesterol level. Increased fatigue of the patients was associated with a lower melatonin level, a higher serotonin level and a lower M/S ratio as compared with patients without fatigue. In other indicators no differences were found. Fatigue in CFS could be associated, similarly as in autoimmune endocrinopathies, with impaired immunoendocrine regulation. In autoimmune thyroiditis, regardless of the concomitant presence of fatigue, in addition to antibodies against thyroid peroxidase most frequently antibodies against the ovaries were detected.

Adult↗

PubMed1997

Simple approach for analysis of plasma oxo-, hydroxy- and dicarboxylic acids.

Following deproteinization of plasma with organic solvents the supernatant was shaken with hexane and cation-exchange resin in an Eppendorf tube to remove fatty and amino acids and the medium was subjected to direct treatment with ethyl chloroformate under catalytic influence of pyridine. A subsequent extraction of the immediately formed ethyl esters with a drop of chloroform enabled us to subject the sample to gas chromatographic (GC) analysis. Since ketocarboxylic acids do not require a preliminary oximation the total time of sample workup and analysis takes only several minutes.

Chromatography, Gas↗

PubMed1996

[Extra-thyroid autoantibodies in autoimmune thyroiditis].

Organ specific autoimmune diseases do not occur isolated. In the authors group of 4509 patients with confirmed autoimmune thyroiditis the authors investigated the frequency of extrathyroid organ specific and non-specific autoantibodies. The objective was to draw attention to other autoimmune diseases which may not yet be clinically manifest. The mutual positivity of antibodies against thyroid peroxidase (TPO) and antibodies against the adrenals was: in the zona glomerulosa 21.1%, in the zona fasciculata 3.0%, in the zona reticularis 19.5%, in the adrenal medulla 9.0%. The mutual positivity of antibodies against TPO and ovaries was 28.5%, testes 12.5%, parathyroid 10.2%, islets of Langerhans 8.2%, hair follicles 45.0%, cell nuclei 26.1%, mitochondria 3.1%, smooth muscles 2.4%, striated muscle 0.2%, and gastroparietal cells of the stomach 12.3%. These results draw attention to the importance of polyclonal activation of the autoimmune process in endocrinopathies and the necessity to assess extrathyroid autoantibodies in autoimmune thyroiditis.

Autoantibodies↗