Single cell-derived clones from human adipose stem cells present different immunomodulatory properties

Area of Science:

• Stem Cell Biology
• Immunology
• Regenerative Medicine

Background:

• Human adipose mesenchymal stem cells (hAMSCs) are a heterogeneous population.
• Single-cell clones display varying differentiation plasticity and immunomodulatory functions.

Purpose of the Study:

• To investigate the immunomodulatory and anti-inflammatory properties of distinct hAMSC clones.
• To characterize the heterogeneity within hAMSC populations regarding cytokine secretion and immune cell inhibition.

Main Methods:

• Isolation and characterization of five single-cell hAMSC clones from two donors.
• Analysis of surface antigen expression (CD105, CD73, CD44).
• Assessment of spontaneous and lipopolysaccharide-stimulated cytokine secretion (IL-6, IL-8, IL-1β, IL-4, IL-5) and lymphocyte proliferation inhibition.

Main Results:

• Clones exhibited distinct surface marker profiles and cytokine secretion patterns.
• Clone 3.X produced higher pro-inflammatory cytokines (IL-1β) post-stimulation, while clones 1.X showed potent inhibition of T lymphocyte and NK cell proliferation.
• Differences in methylation profiles partially explained functional variations.

Conclusions:

• Adipose stem cell populations are heterogeneous in cytokine production and immunomodulatory capacity.
• Isolation, characterization, and selection of specific hAMSC clones represent a precise strategy for developing targeted cell therapies.