Completely serum-free and chemically defined adipocyte development and maintenance.

Area of Science:

• Biotechnology
• Tissue Engineering
• Cell Biology

Background:

• In vitro engineered adipose tissue is vital for soft tissue repair and drug screening.
• Current methods often rely on animal-derived sera, limiting clinical translation.
• Excluding sera is essential for robust and clinically applicable engineered adipose tissue.

Purpose of the Study:

• To develop a serum-free in vitro adipose tissue model.
• To ensure long-term maintenance of adipose tissue function without animal-derived components.

Main Methods:

• Human adipose tissue-derived stem cells were cultured in a xeno- and serum-free environment.
• Adipogenic differentiation was induced using a fully defined medium.
• Adipocytes were maintained in a defined maturation medium for 28 days, with assessments of viability, adherence, and specific markers.

Main Results:

• The defined differentiation medium significantly improved cell adherence and lipid accumulation.
• The defined maturation medium supported long-term cell adherence and functional adipocyte maturation.
• Key adipocyte markers like perilipin A expression and leptin release were evaluated.

Conclusions:

• A novel process for generating and maintaining functional adipocytes without sera or unknown constituents was established.
• This serum-free approach represents a significant step towards clinical trials and in vitro screening using engineered adipose tissue.