The number of fibrocytes (% Col I+/CD45+; A) and differentiating fibrocytes (% α-SMA+; B) within the NANT cell population, were determined in the NANT cells from healthy subjects (n = 8–9) and patients with non-severe (n = 7) or severe asthma (n = 7–9) at day 0 (0 d) or after 3 days (3 d) in the absence or presence of salmeterol (10−9- 10−7 M). The gene discussed is ACTA1; the disease is asthma.