MIRLET7A1 and pulmonary emphysema: Next, we elucidated Mirlet7b/Mirlet7c2 and Mirlet7a1/Mirlet7f1/Mirlet7d cluster expression (herein referred to as Mirlet7bc2 and Mirlet7afd, respectively) in murine models of CS- or nCB-induced emphysema, respectively (Figure 1E).