NK-1 and NK-2 mRNA in BM stroma stimulated with 10 ng/mL SCF and/or 10 nM SP(1-4).

Stroma was stimulated with SCF; at 16 hours, cultures were terminated or washed and then restimulated with SP(1-4) for 16 hours. Total RNA from each culture was studied for NK-1 and NK-2 mRNA by Northern analyses. Lane 1, media alone; lane 2, SCF; lane 3, SCF-SP(1-4).