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- W4313321181 abstract "The aim of the work is to evaluate the hemostimulating activity of recombinant human granulocyte-macrophage colony-stimulating factor (rhGM-CSF) conjugates with alendronic acid (ALN) in the model of cytostatic myelosuppression and the dynamics of rhGM-CSF accumulation as a part of the conjugate in the bone tissue and bone marrow of mice. Materials and methods. The conjugates obtained by a solid-phase synthesis using 1-ethyl-3-[3-dimethylaminopropyl]carbodiimide or periodate oxidation, were used. A hemostimulating activity was evaluated in a model of a cytostatic myelosuppression induced by the administration of cyclophosphamide to CBA/Calac mice. RhGM-CSF preparations were injected subcutaneously for 4-5 days at the dose of 90 µg/kg. After the injections cycle had been completed, the total leukocyte and segmented neutrophil counts were carried out in the blood samples, and the total karyocyte count was carried out in the bone marrow samples. The tissue distribution of rhGM-CSF preparations was assessed in outbred CD-1 mice after a single intravenous administration at the effective dose. The content of rhGM-CSF in blood, femoral tissue and bone marrow was determined by enzyme immunoassay. Results. RhGM-CSF conjugates with ALN have been shown to retain the ability of the original protein to increase the number of leukocytes, segmented blood neutrophils, and bone marrow karyocytes under the action of conjugates. The stimulation of the neutrophil production used to be observed at earlier times than in the case of rhGM-CSF. The increase in the total number of bone marrow cells after the introduction of all three conjugates was more pronounced compared to the original protein (by 34%). The increased hemostimulatory effect of the AEG conjugate was accompanied by a more intense accumulation of rhGM-CSF in the bone tissue and bone marrow of mice. The rhGM-CSF introduced into the conjugate was detected in the bone tissue for 24 h and it circulated in the bloodstream for a longer time compared to the original protein. Conclusion. The data obtained make it possible to conclude that further work on the development of effective hemostimulating drugs based on rhGM-CSF conjugates with ALN, is promising." @default.
- W4313321181 created "2023-01-06" @default.
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- W4313321181 date "2022-12-15" @default.
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- W4313321181 title "HEMOSTIMULATING PROPERTIES OF THE CONJUGATES OF GRANULOCYTE-MACROPHAGE COLONY STIMULATING FACTOR WITH ALENDRONIC ACID" @default.
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- W4313321181 doi "https://doi.org/10.19163/2307-9266-2022-10-5-472-482" @default.
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