PHARMACOGENETIC EFFECTS OF METHOTREXATE (MTX) IN UKRAINIAN PATIENTS DEPENDING ON THE MTHFR GENOTYPES (CLINICAL CASES)

The aim of the study is an evaluation the influence of MTHFR gene polymorphisms in the response to MTX in Ukrainian patients. The study group included unrelated Ukrainian patients with dermatoses - psoriasis vulgaris, psoriasis arthritis, psoriasis erythrodermic, atopic dermatitis, scleroderma, eczema, flat lichen and ectopic pregnancy. The materials for this study are based on the accumulated data from clinical observations of different reactions of patients with dermatoses and ectopic pregnancies when using methotrexate as the basic therapy according protocols. The analysis of the results obtained in the retrospective study indicated that MTX-treated patients had shown a different parameters depending on genotypes or haplotypes of MTHFR gene. After the treatment in the group of patients, carriers of CC genotype on C677T polymorphism of MTHFR gene, who received methotrexate, the normal levels of transaminases were observed. Probably, patients with the CCAA genotype are the fast metabolizers and could take methotrexate and other medications without complications for a long time. In the presented study, alpha-amylase levels in patients with CC and CT genotypes of C677T MTHFR gene before MTX treatment were normal or lower than normal. We found out that the level of amylase was significantly, almost 2 times, increased after treatment with MTX in patients with CCAA haplotype of MTHFR gene. Thus, the study of the association of polymorphisms of the MTHFR gene with a response to MTX has shown that the decrease in the therapeutic effect and the appearance of side effects in different genotypes is in the following relationship: CCAA <CTAA <CTAC. The main idea of future research is the search for ways to increase the effectiveness of therapy in patients, taking into account the pathophysiological processes and the genotypes of one-carbon metabolism genes for successful treatment.

[ANALYSIS OF ONE-CARBON METABOLISM GENES AND EPIDERMAL DIFFERENTIATION COMPLEX IN PATIENTS WITH ICHTHYOSIS VULGARIS]

The aim of the study was to evaluate the effects of allelic polymorphism of the FLG and MTHFR genes and their associations in gynecological patients with ichthyosis vulgaris. Gynecological disorders are observed in presence of some forms of ichtyosis. From the prospective of improving nation's healthcare, the greatest attention is drawn to reproductive disorders. Based on this, the research was also tasked with studying of the genetic nature of gynecological diseases, as well as the influence of geographical latitude on the frequencies of mutagenic alleles of the FLG gene and heterogeneous carriers of these mutations. The collection of clinical-gynecological history was carried out by the method of single registration of the proband on the basis of the Regional Clinical Dermatological and Venereological Health Center No. 1 and the Dermatovenerological Health Centers of the Kharkiv Region. The diagnosis and form of dermatosis is established on the basis of the analysis of clinical and gynecological data and the results of laboratory tests in accordance with ICD-10: ichthyosis vulgaris (Q 80.1.0, OMIM 146700). The data on 18 women and 20 men from 3 families, aged 26 to 76 years old, suffering from ichthyosis, were analyzed. As a result of the study, a direct correlation was determined between the latitude and frequencies of mutant alleles of the FLG gene, as well as between the geographical latitude and frequency of heterozygous carriers of these mutations. The frequencies of the T allele and the CT genotype according to polymorphic variant C677T of the MTHFR gene demonstrate feedback with the latitude indicators. The frequency distributions of the 2282del4 allele and the CT genotype, the N/2282del4 and CT genotypes, the 2282del4 and T alleles, the N/2282del4 genotype and the T allele have opposite latitudinal zonation. The established connections made it possible to predict the development of gynecological pathologies in women with ichthyosis vulgaris. The prevalence of endometriosis and endometrial cancer in women with ichthyosis vulgaris in the Kharkiv region was 33.3%, while the average for the female population in the region was 0.29-0.35%. The number of children born to women with ichthyosis vulgaris did not differ from the regional index.

On the possibility of lipid-induced regulation of conformation and immunogenicity of influenza a virus H1/N1 hemagglutinin as antigen of TI-complexes

The tubular immunostimulating complex (TI-complex) consisting of cucumarioside A2-2, cholesterol and monogalactosyldiacylglycerol (MGDG) from marine macrophytes is the perspective antigen delivery system for subunit vaccines. MGDG is a lipid matrix for the protein antigen incorporated in the TI-complex. The aim of the present work was to study the influence of MGDGs from different macrophytes on conformation and immunogenicity of the secreted recombinant uncleaved hemagglutinin monomer (HA0S) of influenza A virus H1/N1. Differential scanning calorimetry, fluorescence spectroscopy and circular dichroism showed a dependence of the conformational changes of HA0S on the microviscosity of MGDG. The most viscous MGDG from Zostera marina induced the strongest rearrangements in protein conformation. Immunization of mice with HA0S within TI-complexes comprising different MGDGs resulted in an approximately 2-fold increase of the levels of anti-HA0S antibodies and granulocyte-macrophage colony-stimulating factor (GM-CSF) compared with those induced by HA0S alone. TI-complexes based on MGDG from Z. marina stimulated the maximal production of GM-CSF. However, humoral immune response (anti-HA0S antibodies), unlike cell-mediated immune response (GM-CSF), did not depend on the physicochemical properties of MGDGs. It is assumed that this is due to the different localization and conformational lipid sensitivity of the HA0S regions, which are responsible for these types of immune responses.