ADAM17 protects against elastase-induced emphysema by suppressing CD62L+ leukocyte infiltration in mice.

ADAM17 protects against elastase-induced emphysema by suppressing CD62L+ leukocyte infiltration in mice.
Am J Physiol Lung Cell Mol Physiol. 2020 Mar 04;:
Authors: Suzuki S, Ishii M, Asakura T, Namkoong H, Okamori S, Yagi K, Kamata H, Kusumoto T, Kagawa S, Hegab AE, Yoda M, Horiuchi K, Hasegawa N, Betsuyaku T
Abstract
Pulmonary emphysema is a major manifestation of chronic obstructive pulmonary disease and is associated with chronic pulmonary inflammation caused by cigarette smoking, with contributions from immune cells such as neutrophils, macrophages, and lymphocytes. Although matrix metalloproteinases are well-known to contribute to emphysema progression, the role of a disintegrin and metalloproteinase (ADAM) family proteins, other major metalloproteinases, in disease pathogenesis is largely unknown. ADAM17 is a major sheddase that cleaves various cell surface proteins, including CD62L, an adhesion molecule that plays a critical role in promoting the migration of immune cells to the site of inflammation. In the present study, we aimed to investigate the potential role of ADAM17 and CD62L in the development of elastase-induced emphysema. Eight-to-ten-week-old control and Adam17flox/flox/Mx1-Cre (Adam17ΔMx1) mice were intratracheally injected with 5 U of porcine pancreas elastase and monitored for 35 days after injection. Lung alveolar destruction was evaluated by analyzing the mean linear intercepts of lung tissue specimens and by...

Source: Am J Physiol Lung Ce... - March 3, 2020 Category: Respiratory Medicine Authors: Suzuki S, Ishii M, Asakura T, Namkoong H, Okamori S, Yagi K, Kamata H, Kusumoto T, Kagawa S, Hegab AE, Yoda M, Horiuchi K, Hasegawa N, Betsuyaku T Tags: Am J Physiol Lung Cell Mol Physiol Source Type: research