Cytochemistry of nucleoproteids and some cathionic proteins in the peripheral blood leukocytes of patients with lung cancer.

: In 40 patients with untreated lung cancer cytochemical studies of the peripheral blood leukocytes were conducted by means of a cytological method for the simultaneous staining of nucleoproteids (RNP and DNP) and some cathionic proteins (after Zvetkova and Zvetkov [60]). Changes were detected in the RNP cytoplasmic contents of lymphocytes, of which the most outstanding were the reduction and uneven distribution of RNP granules, their frequent extracellular expulsion by means of microclasmatoses, as well as changes in the staining of cathionic proteins of RNP accompanied by an increased nuclear chromatin condensation in the small and medium-sized lymphocytes. Parellel to reducing of the percentage of these cells in the peripheral blood of patients with advanced neoplastic disease an increased number of lymphoblastoid and monoblastoid cells is established with RNP diffusely stained, but reduced in quantity and localized in the cytoplasmic periphery and projections (compared to Downey type II atypical cells). By means of one of the variants of the method (modified type of Feulgen's reaction) a characteristic distribution and structuring of the nuclear chromatin is established in mono- and polymorphonuclear cells, most clearly expressed in the nuclei of monocytes and monoblastoid cells, as well as in nuclei of neutrophil granulocytes. In these cellular types a more specific nuclear modelling (microhypersegmentation) is observed resulting in multiple irregular nuclear projections on the nuclear surface, probably caused by subkaryolemal distribution of uneven chromatin thickenings. The changes are also recorded in the cathionic protein containing secondary cytoplasmic granules in granulocytes-neutrophils and eosinophils, probably associated with changes in the lysosomal and phagocytic functions of these cells in neoplastic diseases. The authors discuss the importance of the obtained results in connection with data on the participation of lymphocytes and neutrophils in the immune response to tumour antigenic stimuli during the course of the neoplastic process, as well as with data on the suppressive effect of antigenic (serum, viral) factors, possibly affecting the synthesis and the transport of cellular nucleoproteids (RNP and DNP) in leukocytes of cancer patients.