MULTIPLE DRUG RESISTANCE PROTEINS OF PULMONARY SOMATIC CELLS AND THEIR SPECIFIC EXPRESSION IN FIBROUS CAVERNOUS TUBERCULOSIS

Abstract

Cells of the host containing special proteins-transporters, so-called proteins of multiple drug resistance (MDR proteins) can contribute to the drug resistance formation.Goal of the study: to define specific expression of gene and distribution of main MDR proteins (MDR1/Pgp, MRP1, lRP, BCRP) in the pulmonary cells in case of active tuberculosis.Materials and methods. Expression of MDR protein genes was evaluated by RT-PCR for mRNA isolated from the surgical specimen of fibrous cavernous tuberculosis patients. Localization of MDR proteins was performed by immunohistochemical staining and confocal laser microscopy. Main results. Intensity of MDR protein genes expression varies in different zones of tuberculous lesions: MDR1 and BCRP are characterized by the highest level and MRP1 gene is characterized by the minimum level. The level of lRP gene expression depends on the inflammation zone and it is maximum in perifocal zone where protein is detected in the cells of alveolar epithelium and macrophages. High expression of MDR protein genes in various parts of tuberculous lesions witnesses about the potential involvement of these proteins in the development of drug resistance to anti-tuberculosis drugs.

Keywords

• фиброзно-кавернозный туберкулез легких
• лекарственная устойчивость