CD4 and central nervous system cancer: Expression of FPRL1 mRNA was also detected in human cells derived from a wide variety of origins, such as PBLs, C8166 (T cells), Molt4#8 (T cells), 293T (embryonic kidney cells), HOS (osteosarcoma cells), U251MG (astrocytoma cell), and U87/CD4 (glioma cell) (Fig. 2A).