申请人:Nakamura Takanori
公开号:US20100310536A1
公开(公告)日:2010-12-09
An object of the present invention is to expand CD34
+
cells ex vivo efficiently in a short term using a biologically safe and inexpensively obtainable low molecular weight compound. A still another object of the present invention is to provide an expansion agent for CD34
+
cells useful for treatment of various hematopoietic disorders caused by dysfunctional hematopoietic stem cells and/or hematopoietic progenitor cells.
A method for expanding CD34
+
cells, which comprises culturing CD34
+
cells ex vivo in the presence of a compound represented by the formula (I) (wherein A, B, L
1
, L
2
, L
3
, L
4
, R
1
, R
2
, R
3
, X and Y are defined in the description), a tautomer or pharmaceutically acceptable salt of the compound or a solvate thereof.