Human lung tissue engineering: a critical tool for safer medicines

Area of Science:

• Biomedical Engineering
• Regenerative Medicine
• In Vitro Toxicology

Background:

• Current research heavily relies on animal models and cell lines, which have significant limitations in relevance and accuracy.
• Immortalized cell lines, while providing abundant material, raise concerns about their original cell type identification and physiological relevance.
• The limitations of traditional models hinder accurate preclinical safety and efficacy assessments.

Purpose of the Study:

• To highlight the broader applications of tissue engineering beyond clinical repair and replacement.
• To advocate for the development and adoption of engineered human tissue models for research and safety testing.
• To emphasize the potential of tissue engineering to replace animal models with more biomimetic in vitro systems.

Main Methods:

• Engineering normal, biomimetic human tissues with defined physiology (human tissue equivalents).
• Capturing complex 3-dimensional tissue/organ physiology in vitro.
• Developing testing strategies utilizing organotypic models.

Main Results:

• Engineered human tissue equivalents offer a more relevant in vitro system compared to traditional animal and cell line models.
• These models accurately replicate complex 3-D tissue/organ physiology.
• The use of these advanced models can directly replace animal testing in certain research and safety evaluations.

Conclusions:

• Tissue engineering provides superior alternatives to animal and cell line models for research and safety testing.
• Organotypic models developed through tissue engineering can significantly improve drug development processes.
• Adopting these advanced in vitro systems will lead to faster delivery of safer, more effective drugs with fewer human side effects.