Abstract: Disclosed are a pharmaceutical composition for preventing or treating a respiratory disease, and health functional food, a food composition, and a quasi-drug composition for preventing and ameliorating a respiratory disease, each including, as active ingredients, a Lactobacillus plantarum KC3 strain and a Leonurus japonicus extract. The composition including the Lactobacillus plantarum KC3 strain (Accession No: KCTC13375BP) and the Leonurus japonicus extract as active ingredients according to an aspect has a defense effect against respiratory damage caused by air pollutants such as fine dust and can inhibit expression of IL-17A, TNF-?, and CXCL-1, thereby being able to effectively treat or prevent a respiratory disease including chronic obstructive pulmonary disease (COPD).

Abstract: The present disclosure relates to a composition for ameliorating immune disorders and preventing or treating respiratory inflammatory diseases, the composition including, as an active ingredient, new lactic acid bacteria from Lactobacillus plantarum KC3 (also referred to as “CKDB-KC3”).