Airway Epithelial Repair by a Prebiotic Mannan Derived from Saccharomyces cerevisiae

Area of Science:

• Pulmonary Medicine
• Cell Biology
• Biochemistry

Background:

• Asthmatic airways experience recurrent epithelial damage and impaired repair processes.
• Current therapies do not directly address the epithelial repair deficit in asthma.
• Mannose receptors are implicated in cellular processes within the airway epithelium.

Purpose of the Study:

• To investigate the effect of Saccharomyces cerevisiae-derived mannan (SC-MN) on in vitro airway epithelial wound repair.
• To determine the role of mannose receptors in SC-MN-mediated epithelial repair.
• To explore the molecular mechanisms underlying SC-MN's effects on bronchial epithelial cells.

Main Methods:

• Utilized 16HBE and primary normal human bronchial epithelial cells (NHBEC).
• Assessed epithelial wound closure and cell spreading following SC-MN treatment.
• Quantified expression and activation of Krüppel-like factors (KLFs) 4 and 5.
• Demonstrated mannose receptor functionality via endocytosis assays.

Main Results:

• SC-MN significantly accelerated wound closure in NHBEC.
• SC-MN treatment promoted cell spreading in 16HBE cells.
• SC-MN increased the expression and activation of KLFs 4 and 5 in NHBEC.
• Mannose receptor presence and function were confirmed in bronchial epithelial cells.

Conclusions:

• SC-MN effectively facilitates wound repair in human bronchial epithelium.
• The repair process involves the engagement of mannose receptors on epithelial cells.
• SC-MN shows potential as a therapeutic agent for improving airway epithelial healing.