Pegylated hyaluronate-endo-β-N-acetylhexosaminidase considerably potentiates the hemostimulating effects of erythropoietin due to intensifi cation of proliferation and differentiation of erythroid precursors against the background of enhanced secretion of hemopoietins by nonadherent hemopoiesis-inducing environment cells and elevation of serum erythropoietin concentration. The use of the enzyme allows 10-fold reduction of the maximum effective erythropoietin dose.

Предложена новая модель изучения процессов миграции циркулирующих в периферической крови стволовых клеток. Исследована мобилизующая предшественники активность гранулоцитарного колониестимулирующего фактора (Г-КСФ), иммобилизированного (имм) на полиэтиленоксиде с помощью нанотехнологии электронно-лучевого синтеза. Выявлена выраженная способность иммГ-КСФ вызывать выход в кровь костномозговых мезенхимальных и кроветворных прогениторных клеток различной степени зрелости. Установлено, что иммГ-КСФ по своей активности превосходит действие неконъюгированного Г-КСФ. Показано наличие специфической активности иммГ-КСФ при его приеме внутрь.

Changes in granulocytopoesis were studied in patients with III-IV stage non small cell lung cancer who received cytostatic treatment with docetaxel/cisplatin regimen as compared to combination of cyclophosphamide/vincristin/carboplatin. Granulocytopoesis under conditions of cytostatic treatment with docetaxel/cisplatin was shown to be able to compensate damages induced by cytostatic agents, that was detected on the levels of committed precursors, morphologically differentiated elements of the marrow and peripheral blood.

This study demonstrated the possibility of in vivo activation of progenitor cells by hyaluronidase. Specifically, treatment with hyaluronidase increased the number of mesenchymal and bone marrow precursor cells, their proliferative activity, and differentiation. Also, it promoted stem cell mobilization into blood under effect of granulocyte colony-stimulating factor (G-CSF) and enhanced progenitor cell adhesive properties. Therapeutic efficiency of transplantation of mononuclear cells isolated from peripheral blood after administration of G-CSF improved under effect of hyaluronidase. Hyaluronidase immobilized by electron beam synthesis nanotechnology exhibited high specific activity with respect to stem cells via both enteral and parenteral routes.

Mechanisms of action of pantogematogen (PG), granulocyte colony-stimulating factor (G-CSF), glycyram, and D-glucuronic asid (D-GA) have been investigated under the conditions of myelosuppression caused by the introduction of cyclophosphane. It is established that the activation of granulocytopoiesis by these preparations is based on various mechanisms: G-CSF directly stimulates the proliferation and differentiation of hemopoietic cells; PG enhances the proliferation of granulocytes due to activation of the regulatory systems; D-GA and glycyram normalize the structural and functional organization of a bone marrow, thus providing intensive maturing of the colony-forming units.

The effect of various hemopoiesis stimulators on the granulocytic stem-cell recovery under the condition of cyclophosphane-induced myelosupression was studied. Cultural and morphological methods of studying the hemopoietic cells and hemopoiesis-induced microenvironment were used. Granulocytic colony-stimulating factor was shown to stimulate proliferation and differentiation of hemopoietic cells. Pantogematogen enhanced proliferation of granulocytes due to activation of regulatory systems. D-glucuronic acid and glyciram normalized structural-functional organization of bone marrow producing the intensive maturation of colony-forming units.

The granulocyte lineage reaction and its mechanism were studied in the bone marrow of patients with breast cancer in stage III-IV treated according to a specific CAF scheme including cropanol, an antitumor drug of the animal origin. It was found that the bone marrow cytopoiesis suppressed by the cytostatics is stimulated by cropanol on the level of committed precursors, morphologically differentiated bone marrow elements, and peripheral blood.

The granulocyte lineage reaction and its mechanism were studied in the bone marrow of patients with breast cancer in stage III - IV treated according to a specific CAF scheme including cropanol, an antitumor drug of the animal origin. It was found that the bone marrow cytopoiesis suppressed by the cytostatics is stimulated by cropanol on the level of comitted precursors, morphologically differentiated bone marrow elements, and peripheral blood.