ANAPC2 antibody catalog is a collection of human ANAPC2 antibodies and recombinant proteins. ANAPC2 is a core subunit of the anaphase-promoting complex (APC)/cyclosome, a large protein complex that promotes metaphase-anaphase transition by targeting mitotic cyclins for ubiquitination and subsequent proteasomal degradation. The APC/cyclosome complex is composed of eight subunits, including p27.
APC/C is essential for the maintenance of hematopoiesis by helping hematopoietic stem cells (HSPCs) to stay quiescent. However, in hematological diseases, such as myelodysplastic syndrome (MDS), impaired APC/C activity is associated with a decline in hematopoietic stem cell numbers. In the present study, we generated conditional knockout mice for APC2 and analyzed changes in hematopoiesis by performing blood routine examinations, BM histology and BM colony-forming capacity assays.
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The hematopoiesis was examined in Anapc2flox/floxMx1-Cre mice that were crossed with CD34+LSK cells, a cell line that represents the precursors of erythrocytes and lymphocytes. The number of c-Kit+LSK cells in the peripheral blood and in BM was drastically reduced in Anapc2 cKO mice. Moreover, a dramatic decrease of d-HSPCs was observed in the BM of Anapc2 cKO mice.
To investigate the role of APC2/cyclosome in hematopoiesis, we performed bi-color IHC staining on the BM sections of AA patients with and without APC2/cyclosome activity. We found that in AA marrows, APC2/cyclosome was significantly reduced and that the reduction was correlated with MDS phenotypes. Moreover, we demonstrated that APC2/cyclosome was required for the maintenance of d-HSPCs in vivo.