Существуют многочисленные подтверждения того, что при ряде опухолей диссеминированные опухолевые клетки (ДОК) в костном мозге (КМ)-предшественники последующих отдаленных метастазов. Детекция ДОК при немелкоклеточном раке легкого (НМРЛ) позволит получить важную информацию об особенностях метастазирования и оценить возможности выявления новых мишеней для лекарственной терапии НМРЛ. Цель исследования-оценить возможность детекции ДОК в КМ у больных НМРЛ, а также проанализировать частоту поражения и взаимосвязь с клинико-морфологическими параметрами опухоли.
Introduction Generation of most immunocompetent cells takes place in bone marrow Bone marrow. As well, bone marrow is a peripheral lymphoid organ where antitumor effector cells and memory cells are present. The aim of the work is to estimate peripheral lymphoid cell subpopulations in bone marrow of lung cancer patients. Materials and methods Study has been done in 68 pts with lung cancer: squamous cell cancer (n = 28), adenocarcinoma (n = 38), other forms (n = 2). In all cases standard diagnostic and staging procedures were performed, as well as morphological (myelogram) and immunological study of bone marrow lymphocyte subpopulations. Multicolor Flow cytomtry was used for study of bone marrow lymphocyte populations. We studied T-cells and its subpopulations, B-cells, NK-cells, perforin-positive cells, and CD27-positive cells. Results Squamous cell lung cancer was characterized by higher content of bone marrow mature T-cells (CD3), and CD8 lymphocytes. More typical for adenocarcinoma was mature B-cell reaction (CD20). Effector (perforin-positive) populations of lymphocytes also were related to histological type of cancer: for adenocarcinoma presence of CD4-positive cytotoxic lymphocytes and CD27-expression on effector cells. Perforin-containing lymphoid cells were in opposite correlation to erythrocaryocytes. Conclusion Subpopulational lymphocyte content of bone marrow is related to histological variant of cancer and erythropoiesis in lung cancer patients.
Introduction.Detection of disseminated tumor cells (DTC) in solid tumors is an important component of the assessment of disease prognosis. Bone marrow damage is common. There is evidence indicating an important role for bone marrow lymphocyte subpopulations in hematogenous metastasis. Aim.To evaluate the frequency of bone marrow damage in patients with non-small cell lung cancer (NSCLC) based on the detection of DTC by flow cytometry, as well as their effect on the population of bone marrow lymphocytes. Materials and methods.62 bone marrow samples of patients with a verified diagnosis of NSCLC: adenocarcinoma (33), squamous cell carcinoma (27), other types (2). Methods: morphological, multicolor flow cytometry. Studied DTC, lymphocyte populations CD3, CD4, CD8, CD19, CD20, CD16, CD27. Collection and analysis: FACS Canto II, USA, Kaluza Analysis v2.1. Results.In bone marrow, DTC (EPCAM+CD45-) were found in 43.5% of patients with NSCLC (1 cell per 10 million myelocariоcytes was taken as the threshold value). The presence of DTC did not correlate with the size of the tumor, the status of the lymph nodes, and the stage of the tumor process. DTC was more often observed in more differentiated tumors (p=0.023). A significant increase in the level of subpopulations of CD16+CD4-NK-cells (p=0.002), CD27+CD3+T-cells (p=0.015) with bone marrow damage was revealed. Conclusion.The possibility of detecting DTC in the bone marrow of patients with NSCLC was established, in 43.5% of patients with NSCLC in the bone marrow DTC was detected, and their presence was established even with a localized tumor process. More frequent bone marrow damage was observed with well-differentiated tumors. The relationship between DTC and bone marrow lymphocyte populations was revealed: subpopulations of CD16+CD4-, CD27+CD3+.
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