SCF mRNA expression in lung transplant recipients. SCF mRNA was quantified after total RNA reverse transcription by on-line fluorescent PCR in biopsy specimen from control subjects (Control) and lung tranplant patients at Months (Mo) postgraft 1 to 3 (M1-M3), and 4 to 12 (M4-M12). Results were normalised to GAPDH mRNA expression, and expressed in pg/μg as the ratio [SCF mRNA]/[GAPDH mRNA]. Symbols denote individual episodes (◆ : stable condition, ○ : acute lung rejection, × : infection). Median values are also shown (bold line) (NS; non-significative, *; p < 0.05, **; p < 0.01, ***; p < 0.001).