Autoradiographic and fluorescent staining studies of bone marrow chromosomes from a patient with acute granulocytic leukemia

Results of cytogenetic studies of a patient with acute granulocytic leukemia are described. The modal number of chromosomes in cells from bone marrow samples was 43; the karyotype was characterized by missing chromosomes in groups B, C, and E. According to successive studies of the same metaphases by fluorescent staining and autoradiographic techniques, the labeling pattern of chromosomes in leukemic cells was generally similar to those observed in normal cultured leukocytes, whereas the fluorescent pattern of leukemic chromosomes was rather indistinct, and the bright fluorescent pattern of the Y chromosome was not apparent.

Two C Receptors on Lymphoid Cells

Some cultured lymphoid cell lines from Burkitt lymphoma such as Daudi cells do not fix EA(IgM)C43 which were prepared with guinea pig C although the cells fix EA(IgM)Cm which were prepared with mouse C. For the analysis of mouse serum factors, EA(IgM)C42 were reacted with a dilution of test sample at 37°C for 15 min in the presence of EDTA. After the incubation, human erythrocytes (HuE) or Daudi cells (Dc) were added to the reaction mixture to examine the adherence reactivity to those indicator cells. The activities to convert EA(IgM)C42 into being reactive to HuE and to Dc were designated as H-activity and D-activity, respectively. After DEAE-cellulose column chromatography, H- and D-activities of mouse plasma were separated on a CM-cellulose column. Although almost 100% of H-activity was recovered, the recovery of D-activity at the last column was less than 20%. But retitration of D-activity in the presence of a fraction of H-activity showed that D-activity also recovered at about 100%.

Electrokinetic Behavior of Intermediate Cells in Immune Hemolysis

Electrophoretic mobility of intermediate cells was increased with the reaction of C2 and further increased with the addition of C3. Less than 18 molecules of C2 per cell produced detectable change in electrophoretic mobility. The increase in mobility by the formation of C2 sites diminished with the decay of C2 sites. C1 is required to maintain the high mobility of EAC142, EAC1423 or EAC143. No change in the mobility of intermediate cells was observed by the reaction of C5, C6, C7 or C8. After the reaction of C9, the electrophoretic mobility of E* decreased significantly before rupture of the cell.

Effects of compound 48-80 on immune haemolysis: enhancement of C1 site formation and inhibition of C4 site formation

Compound 48/80 inhibits the interaction of C4 to make an active C4 site on EAC1. Treatment of EAC4 with 48/80 enhances the reactivity of the cells with C1 to form SAC14.

Histochemical studies of experimental heterotopic calcification induced by potassium permanganate in the pulp of the mandibular incisor of rabbits

Heterotopic calcification in the pulp of the mandibular incisor of rabbits was induced by pulpal injection of potassium permanganate. There were similarities in the histochemical and microradiographic properties, in the tubular structures, and in the appositional patterns between dentin and the calcified tissues produced by odontoblastlike cells.