ABSTRACT
This study was purposed to establish and identify the model of extramedullary infiltration of CML-NOD/SCID mice. 24 mice were irradiated with 270 cGy of (137)Cs and absorbed dose rate 80 cGy/min, and were randomly divided into test group I, test group II and control group. The mice in test group I and test group II were injected with 5×10(6) and 1×10(7) K562 cells per mouse respectively, the mice in control group were injected with 0.2 ml of normal saline. The general situation and survival time of these mice were monitored, the extramedullary infiltration of leukemia cells was detected by histopathology examination and RT-PCR. The results indicated that at 4 - 8 weeks after injection, all the mice of group I and group II displayed extramedullary infiltration, suggesting that CML/NOD-SCID model was successfully established. It is concluded that the model of extramedullary infiltration of CML/NOD-SCID mice can be established by injection K562 cells into caudal vein, and can be confirmed by histopathologic examination and detection of BCR-ABL fusion gene using RT-PCR.
Subject(s)
Animals , Female , Humans , Male , Mice , Disease Models, Animal , Injections, Intravenous , K562 Cells , Leukemia, Myelogenous, Chronic, BCR-ABL Positive , Mice, Inbred NOD , Mice, SCID , Neoplasm Transplantation , TailABSTRACT
This study was aimed to investigate the effect of polypeptide extract from scorpion venom (PESV) on PI3K, p-Akt signal protein regulating K562 cell apoptosis and its mechanism. The K562 cells were cultured with PESV for different time, the cell growth curve was determined by MTT method, the levels of PI3K and p-Akt proteins were detected by Western blot. The results showed that as compared with control group, the apoptosis rate of K562 cells treated with PESV increased, the levels of PI3K and p-Akt expression decreased. It is concluded that the PESV inhibits the proliferation and promotes the apoptosis of K562 cells probably through suppressing the expression of PI3K and p-Akt signal proteins.
Subject(s)
Humans , Apoptosis , Cell Proliferation , K562 Cells , Phosphatidylinositol 3-Kinases , Metabolism , Proto-Oncogene Proteins c-akt , Metabolism , Scorpion Venoms , Pharmacology , Signal TransductionABSTRACT
NOD/SCID (non-obese diabetic/severe combined immunodeficient) mice are immune deficient mice which are made by backcross of severe combined immunodeficient mice with non-obese diabetic mice strains. NOD/SCID mice are both innate immune deficiencies and lack of T and B lymphocytes. Various tumor cells can be implanted in this kind of mice, the rejection and graft-versus-host disease (GVHD) occur fewer. Therefore, NOD/SCID mice gradually become a useful tool for the study on Experimental Hematology. This paper comprehensively reviews the biological characteristics of NOD/SCID mice, the establishment of human leukemia model, stem cell transplantation, drug research, deficiency and improvement of NOD/SCID mice in application for study.