[The phenomenon of pseudotumorous cross immunohistochemical reactivity of glia in progressive multifocal leukoencephalopathy]. / Fenomen psevdotumoroznoi perekrestnoi immunogistokhimicheskoi reaktivnosti glii pri progressiruyushchei mul'tifokal'noi leikoentsefalopatii.

Progressive multifocal leukoencephalopathy (PML) is a subacute demyelinating brain damage caused by infection of oligodendrocytes and astrocytes with the lytic JC virus on the background of immunosuppression. A case report of PML with a tumor-like course is presented. Morphological diagnostics revealed non-specific staining of antibodies to Ki-67, p53, IDH1, NF and Vim in the nuclei of gliocytes affected by the JC virus. Histological examination and microscopic evaluation of the changes in the brain for the diagnosis of PML is a priority. The recommended intravital biopsy does not always help in clear verification of PML due to the limited volume of tissue fragments presented for research. For the correct interpretation of changes during an intravital pathological examination and verification of PML, it is important to take material during a stereotaxic biopsy, not only from the center, but from the edges and perifocal zone of the altered tissues for the possibility of a spatial histological assessment of the pathological process.

Reaction of the Palatine Tonsillar Immunocompetent Cells to Irrigation of Crypts by Suspension of Silica Nanoparticles under Conditions of Chronic Tonsillitis.

We studied the response of neutrophils, macrophages, and mast cells to local application of silica nanoparticles (10-20 nm). Histological examination of tonsillar postoperative material from 6 patients aged 24-44 years with recurrent tonsillitis was carried out. Irrigation of the tonsillar lacunae was carried out over 5 days before bilateral tonsillectomy: on the right by Polysorb MP suspension (1 g/liter), on the left by saline. The contact of nanoparticles with the mucosa led to a decrease in the number of cells expressing myeloperoxidase (p=0.02) and an increase in the count of CD68+ cells (p=0.04); the count of mast cells remained unchanged. Local use of medical adsorbent based on silica nanoparticles induced changes in cells due to their resorption by the tissue. Positive chemotaxis of CD68+ macrophages revealed in the tonsillar lymphoid tissue attested to stimulation of non-specific immunity and inductive phase of specific immunity. The authors hypothesized that internalization of medical nanoparticles by resident phagocytes of the mucosa could support targeted biodistribution of drugs in the palatine tonsils.

[Efficacy of the infusion hepatotropic drug remaxol in the pathogenetic therapy for cirrhotic stage chronic viral hepatitides]. / Effektivnost' infuzionnogo gepatotropnogo preparata remaksol v patogeneticheskoi terapii khronicheskikh virusnykh gepatitov na tsirroticheskoi stadii.

AIM: To investigate the impact of therapy with the infusion hepatoprotector remaxol on liver function in cirrhosis in the outcome of chronic viral hepatitides (CVH): HCV, HBV, HCV+HBV, and HBV+HDV. SUBJECTS AND METHODS: Sixty-five patients aged 26 to 76 years, who had been diagnosed as having liver cirrhosis (LC) in the outcome of CVH: HCV, HBV, HCV+HBV, and HBV+HDV were examined. During infusion therapy, every day 32 cirrhotic patients in the outcome of CVH B or C received intravenous remaxol 400 ml in a jetwise manner once daily for 11 days. A comparison group comprised 33 patients with the similar condition who had intravenous ademetionine 400 mg in a jetwise fashion during infusion therapy with crystalloids (400 ml of isotonic sodium chloride solution, Ringer's solution) for 11 days. RESULTS: After an infusion therapy cycle, the study group patients were recorded to have more significantly reduced cytolytic and cholestatic parameters. The pronounced hepatotropic effect of the drug was confirmed by the rate of a decline in the average concentrations of alanine aminotransferase, aspartate aminotransferase, and total bilirubin. In the study group patients, the relative values of a decrease in the levels of these biochemical parameters were 29, 29, and 40% versus 15, 20, and 9% in the control patients. CONCLUSION: Infusion therapy with remaxol in the combination treatment of the patients with viral LC not only improves liver function (reduces the degree of cytolysis, cholestasis), but also exerts a cytoprotective effect on peripheral blood cells (leukocytes, lymphocytes, platelets).

[Primary giant pulmonary leiomyosarcoma].

The authors describe their case of primary giant pulmonary leiomyosarcoma as a rare cancer nosological entity. The specific features of the case were not only its rarity, the extent of lung and mediastinal involvement, and the pattern of tumor growth, but also the absence of metastases despite aggressive course. The size of the tumor and its specific growth pattern determined technical surgical treatment problems and early postoperative complications that resulted in death.

[Reconstruction of the connective tissue as a result of transplantation of fibrins dermal equivalent to the wounds of experimental animals].

We analyzed the effectiveness of wound healing in rats after application of the dermal equivalent (DE) based on fibrin with dermal fibroblasts. Histological studies of newly formed dermis biopsy samples selected during its recovery in the model wound in laboratory animals have shown a positive effect of DE on wound healing. It was found a significant increase in the area of collagen fibers, in the number of prekapillaries, capillaries and postcapillaries in the granulation tissue after application of DE compared with the control group, suggesting a more intense repair.

[Immunohistochemical study in the diagnosis of tuberculosis].

The comparative analysis of the immunohistochemical method and Ziehl-Neelsen staining was used to search for a new highly sensitivity procedure for diagnosing tuberculosis. With both methods, mycobacteria tuberculosis were detected in 10 cases of fibrocavernous pulmonary tuberculosis, 1 case of general tuberculosis, and 10 cases of disseminated lung lesion (sarcoidosis?). The improved immunohistochemical option using Mycobacterium tuberculosis antibodies (clone 1.1/3/1) have shown AEC and appeared to be the most sensitive than the Ziehl-Neelsen staining and may be therefore recommended for the diagnosis of tuberculosis.

[Testosterone production by tumor tissue in partial androgen deficiency in aged men (PADAM)].

The aim of the study was examination of cause-effect relationships between PADAM, extragonadal production of androgens and high proliferative activity in aged men. The study group included 15 patients aged between 53 and 79 years with prostatic cancer (n = 5), urinary bladder cancer (n = 5) and cancer of the rectum (n = 5). Control samples of tissues of the prostatic gland, urinary bladder and rectum were obtained from dead bodies of men at the age between 18 and 29 years killed in the accidents at the age from 18 to 29 years. Testosterone levels in the tissues of peritumor zone of the prostate, in tumor tissue of patients with cancer of the prostate, urinary bladder and the rectum were higher than in blood serum. In prostatic cancer, testosterone in the tumor tissue was higher than in the tissues of prostatic peritumor zone. The values of Histochemical score AR of the peritumor zone in prostatic cancer patients were higher than those of the control group. It was detected that ER, PR, bcl-2, Ki-67 and p53 in prostatic tissue of young controls were absent while in patients with prostatic cancer these factors were expressed in the peritumor zone. In cancer of the urinary bladder, peritumor zone showed expression of PR, bcl-2, Ki-67 and p53, while no such expression was in the controls. ER, bcl-2, Ki-67 and p53 were registered in the peritumor zone of patients with cancer of the rectum but the controls had neither ER, bcl-2 nor p53 while Ki-67 expression in rectal cancer was higher than in the controls. The results of the study suggest that testosterone production by some tumors and tissues of the peritumor zone accompanied with high proliferative activity and dysregulation of the cell cycle is secondary to PADAM. These changes arise to compensate testicular deficiency and are manifestations of metabolic syndrome (X-syndrome). In this situation immune system fails to utilize all atypical cells.

[Changes in the expression of receptors of steroid hormones in the development of partial androgen deficiency of aging men (PADAM)].

This work is devoted to the vital topic of the influence of partial androgen deficiency of aging men (PADAM) on the development of cells with androgen receptors. The results obtained in this study suggest a conclusion that the production of testosterone by some tumors and tissues of the peritumorous zone, which is accompanied by increased proliferative activity and disturbance of the regulation of the cell cycle, is caused by PADAM. The given changes are directed at compensating for testicular deficiency (in particular at overcoming the androgen-dependent stage of development of androgen-sensitive cells). These changes are a partial manifestation of metabolic syndrome (X-syndrome). The atypical cells, which unavoidably develop during metabolic syndrome, are dealt with by means of the immune system, whose capabilities become less and less adequate in the given circumstances.