Department of Environmental and Occupational Health, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, United States.
Front Cell Infect Microbiol. 2021 Nov 22;11:652944. doi: 10.3389/fcimb.2021.652944. eCollection 2021.
Bacterial infections contribute to accelerated progression and severity of chronic obstructive pulmonary disease (COPD). Apples have been associated with reduced symptoms of COPD and disease development due to their polyphenolic content. We examined if phloretin, an apple polyphenol, could inhibit bacterial growth and inflammation induced by the main pathogens associated with COPD. Phloretin displayed bacteriostatic and anti-biofilm activity against nontypeable (NTHi), , , and to a lesser extent, . , phloretin inhibited NTHi adherence to NCI-H292 cells, a respiratory epithelial cell line. Phloretin also exhibited anti-inflammatory activity in COPD pathogen-induced RAW 264.7 macrophages and human bronchial epithelial cells derived from normal and COPD diseased lungs. In mice, NTHi bacterial load and chemokine (C-X-C motif) ligand 1 (CXCL1), a neutrophil chemoattractant, was attenuated by a diet supplemented with phloretin. Our data suggests that phloretin is a promising antimicrobial and anti-inflammatory nutraceutical for reducing bacterial-induced injury in COPD.
细菌感染会加速慢性阻塞性肺疾病(COPD)的进展和严重程度。由于苹果富含多酚类物质,因此与 COPD 症状减轻和疾病发展有关。我们研究了苹果多酚根皮苷是否可以抑制与 COPD 相关的主要病原体引起的细菌生长和炎症。根皮苷对非典型性(NTHi)、 、 、 显示出抑菌和抗生物膜活性,对 的活性较弱。根皮苷还抑制了 NTHi 与 NCI-H292 细胞(呼吸上皮细胞系)的黏附。根皮苷在 COPD 病原体诱导的 RAW 264.7 巨噬细胞和源自正常和 COPD 肺病的人支气管上皮细胞中也表现出抗炎活性。在小鼠中,富含根皮苷的饮食可减轻 NTHi 细菌负荷和趋化因子(C-X-C 基序)配体 1(CXCL1),一种中性粒细胞趋化因子的水平。我们的数据表明,根皮苷是一种很有前途的抗菌和抗炎营养保健品,可减少 COPD 中细菌引起的损伤。