Anemia is one of the commonest manifestations of leukemia.Majority of patients with leukemia(75%~90%)have already had anemia at diagnosis.Leukemic anemia is closely related to the quality of life and the tolerance to chemotherapy of patients with leukemia and needs to be appropriately treated as an important component of supportive care.Multiple mechanisms are involved in the pathophysiology of leukemic anemia.Blood component transfusion remains the mainstay of management of leukemic anemia.Rare types of leukemic anemia are also addressed from a clinical point of view for the purpose of correct resolution of these problems.A general consideration of leukemic anemia is introduced in the review.

Objective To investigate the clinical features,treatment response and prognosis of patients with severe hemorrhagic fever with renal syndrome and complicated with acute anhemopoisis.Methods The clinical features of 18 patients with hemorrhagic fever with renal syndrome complicated with acute anhemopoisis were retrospectively analyzed.Resalts The clinical manifestations of the 18 adult patients(10 males and 8 females,age ranged from 14 to 55 years)with hemorrhagic fever with renal syndrome showed irregular fever,abrupt anemia and multiple sites hemorrhage at the severe stage(9-25 days after the onset).Peripheral leucocytes counts reduced to(2.3-3.2)×109/L,platelet to(23-31)×109/L,erythrocytes to(2.23-2.79)×1012/L,hemoglobulin to 52-67 g/L and reticulocyte to 0-0.002.Bone marrow test results showed that the hyperplasia of erythrocytes series decreased.The ratio of granulocyte to erythroeyte was significantly elevated,while granuloeyte and megalocaryocyte series decreased.The specific manifestations of acute anhemopoiesis were abrupt anemia,irregular fever and multiple sites hemorrhage.The major combined treatments were cortecosteroids and blood transfusion.These patients recovered at 26-60 days after the onset of the disease.Conclusions Hantaan virus could attack human bone marrow cells and induce cytopathogenic effect.In the course of hemorrhagic fever with renal syndrome,acute anhemopoisis could occur.The prognosis of these complicated cases is usually favorable.

Objective:To assess the potential of mouse immune-costimulating signal B7-2 in inducing immune effect.Methods:(1)The specific mB7-2cDNA fragment from LPS-stimulated mouse splenocytes was obtained by reverse transcription and polymerase chain reaction.The obtained fragment was inserted to pLXSN plasmid.Then the plasmid pLXSN-mB7-2 was packaged into PA317 cells;(2)The EL4/mB7-2 was obtained by infecting the EL4 by the concentrated virus particles produced by PA317/mB7-2;(3)In vitro,the secretion of IL-2 of EL4/mB7-2 stimulated-lymphocytes was detected by using mixed lymphocytes culture.Results:pLXSN-mB7-2 and transgenetic EL4/mB7-2 cells were obained successfully.IL-2 production in 24h in the supernatant stimulated by EL4/mB7-2 was much higher than wild EL4 cells.Conclusion:EL4/mB7-2 can activated T cell to produce IL-2.This research lay foundation for the research of the function of immune-costimulating signal in the tumor immunity and treatment,the mechanism of autoimmune disease and organ transplantation.