Breathing immunity into in vitro lung models

Area of Science:

• Immunology
• Respiratory Medicine
• Biotechnology

Background:

• The human lung possesses a specialized immune microenvironment vital for defense and repair.
• Existing animal models inadequately represent human immune pathways, hindering insights into respiratory diseases.
• Current in vitro lung models often lack immune components, limiting the study of host-immune interactions.

Purpose of the Study:

• To review the impact of immune-competent lung models on drug development and disease mechanisms.
• To explore future potential and technical challenges in integrating immune cells into in vitro lung models.
• To discuss strategies for maximizing the clinical relevance of these advanced models.

Main Methods:

• Review of existing literature on immune-competent lung models.
• Analysis of challenges in immune cell integration (viability, phenotype, recruitment).
• Exploration of biofabrication techniques (ECM, bioprinting, microvascular networks).

Main Results:

• Immune-competent lung models show significant impact on clinical drug development and mechanistic studies.
• Key challenges include maintaining immune cell function and ensuring microenvironmental compatibility.
• Biofabrication approaches enable physiologically relevant immune-resident lung cell interactions.

Conclusions:

• Advances in biofabrication and model development are paving the way for improved immune-competent lung models.
• These enhanced models promise to accelerate therapeutic discovery for respiratory diseases.
• Increased translational relevance of in vitro lung models is a key future outcome.