Aim. To establish correlation between CD34+ autologous hematopoietic stem cell (HSC) count and colony-forming units (CFU) in the same peripheral blood apheresis product samples before and after cryopreservation in multiple myeloma and lymphoma patients, and to assess clinical value of these parameters. Materials & Methods. Cell samples of peripheral blood cyta-pheresis product and cell cultures were studied before and after cryopreservation in 32 multiple myeloma and 25 lymphoma patients who underwent autologous HSC transplantation. The material was analyzed using culture technique and flow cytometry. Results. The paper provides information on the relationship between CD34+ HSC count obtained by flow cytometry, and CFU in cell culture obtained by cytapheresis of the same peripheral blood samples. A direct correlation was confirmed between CD34+ count and all the CFUs before and after cryopreservation in lymphoma patients. Correlation between CD34+ count and granulocyte-macrophage CFUs was revealed in multiple myeloma and lymphoma patients before cryopreservation. Conclusion. The parameter of colony-forming capacity used for the assessment of the functional HSC was shown to be equally reliable criterion for condition evaluation of autotransplant proliferative pool than CD34+ cells. Both methods should be applied for qualitative and quantitative evaluation of an autotransplant for multiple myeloma and lymphoma patients.

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Clinical oncohematology. 2016;9(2): 176-90 Клиническая онкогематология. 2016;9(2) ABSTRACT Background & Aims. Niche-forming elements of the bone marrow and lymphoid organs play an important role in the pathogenesis of chronic lymphocytic leukemias. The aim is to determine multifunctional characteristics of stromal elements of the hematopoietic and lymphoid microenvironment involved in formation of a niche of hematopoietic stem cells and lymphoid precursor cells. Methods. Histological specimens of the bone marrow and lymph nodes of 112 CLL patients (64 men and 48 women) were investigated. 45 patients were included in the combined analysis group. The age median was 60 years. 50 volunteers were included in the control group: trepanobiopsy of the iliac area was performed in 30 healthy subjects, and lymph node biopsy was performed in 20 patients with reactive lymphadenopathy. Standard staining (hematoxylin-eosin, azure-II-eosin, silver impregnation, Masson stain) was used for histological studies. The immunohistochemical analysis was performed using the primary antibody panel and the polymer visualization system Dako according to staining protocol. Results. While analyzing 96 trepanobioptates, we isolated three types of bone marrow infiltration: nodular (18.8 %, n = 18), interstitial (27 %, n = 26) and diffuse (54.2 %, n = 52). Nodular and interstitial bone marrow infiltrations reflect a more favorable course of CLL as compared to the diffuse type. The morphological characteristics of the bone marrow stroma of CLL patients may be caused by both primary impairment of the hematopoietic microenvironment, and cytokine disbalance resulting from the effect on the stroma of the leukemic clone. The morphological examination of lymph node bioptate of CLL patients demonstrated impairment of histoarchitectonics of lymphoid tissue elements in all cases. In lymph nodes of CLL patients, we demonstrated the increased number of small vessels on the background of decreased expression of extracellular matrix protein expression: IV type collagen, laminin, and desmin. Disintegration of lymph node follicular dendritic cells network was demonstrated.