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Updated: Jan 10, 2026
Isolation and Enrichment of Human Adipose-derived Stromal Cells for Enhanced Osteogenesis
Published on: January 12, 2015
A serum-free adipose-conditioned medium delays stem cell senescence and maintains tissue homeostasis via IL-6/STAT3
Jing Li1, Longzhu Song1, Dongzi Song1
1Department of Burn and Plastic Surgery, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China.
Background:
Stem cell exhaustion and cellular senescence are two hallmarks of aging. Mesenchymal stem cells (MSCs), as key players in tissue regeneration, are particularly vulnerable to senescence, which compromises both their endogenous regenerative capacity and their therapeutic efficacy in cell-based applications. Suppressing MSC senescence is therefore essential for developing effective regenerative and anti-aging strategies.
Methods:
We developed a serum-free adipose-conditioned medium (SF-ACM) from in vitro-cultured human adipose explants. Its anti-aging effects were evaluated in oxidative stress-induced and replicative senescence models of human adipose-derived stem cells (ADSCs), assessing proliferation, senescence markers, migration, and trilineage differentiation. Parallel experiments in senescent human dermal fibroblasts (HDFs) examined proliferation, fibrosis, and senescence features. In vivo, male C57BL/6 J mice (4 or 16 months old) with D-galactose-induced and naturally aged mice received intraperitoneal SF-ACM. Aging phenotypes were analyzed in skin, adipose tissue, muscle, kidney, and serum, along with hepatic and renal safety assessments.
Results:
SF-ACM significantly reduced senescence-associated markers, including p16, p21, p53, and SA-β-gal, enhanced Lamin B1 expression, and improved the proliferation, migration, and differentiation capacities of ADSCs. It also decreased senescence and fibrosis-related markers in HDFs. In aging mice, SF-ACM improved aging-associated phenotypes in skin, adipose tissue, and skeletal muscle. Mechanistically, these effects were associated with suppression of the IL-6/STAT3 signaling pathway.
Conclusions:
This study identifies a novel xenogeneic-free, paracrine-rich formulation that delays cellular senescence and preserves tissue homeostasis. These findings support its potential as a safe and effective strategy to suppress cellular aging, restore stem cell function, and ameliorate tissue-level aging, offering translational promise for regenerative medicine and anti-aging interventions.
Insights
A novel serum-free adipose-conditioned medium (SF-ACM) effectively combats cellular senescence in stem cells and fibroblasts. This SF-ACM formulation shows promise for regenerative medicine and anti-aging strategies by preserving tissue homeostasis.
Area of Science:
- Gerontology
- Regenerative Medicine
- Cell Biology
Background:
- Cellular senescence and stem cell exhaustion are key aging hallmarks.
- Mesenchymal stem cells (MSCs) are vital for tissue regeneration but susceptible to senescence, impairing their therapeutic potential.
- Inhibiting MSC senescence is crucial for effective anti-aging and regenerative therapies.
Purpose of the Study:
- To develop and evaluate a novel serum-free adipose-conditioned medium (SF-ACM) for its anti-aging properties.
- To assess SF-ACM's efficacy in mitigating senescence in human adipose-derived stem cells (ADSCs) and dermal fibroblasts (HDFs).
- To investigate SF-ACM's effects on aging phenotypes in vivo and elucidate its underlying mechanisms.
Main Methods:
- SF-ACM was derived from human adipose explants.
- In vitro studies used oxidative stress- and replicative senescence models of ADSCs and HDFs, assessing proliferation, senescence markers, migration, and differentiation.
- In vivo studies administered SF-ACM to young and aged mice to evaluate aging phenotypes and safety.
Main Results:
- SF-ACM significantly reduced senescence markers (p16, p21, p53, SA-β-gal) and enhanced proliferation, migration, and differentiation in ADSCs.
- SF-ACM decreased senescence and fibrosis markers in HDFs.
- In aged mice, SF-ACM improved skin, adipose tissue, and skeletal muscle aging phenotypes, linked to IL-6/STAT3 pathway suppression.
Conclusions:
- SF-ACM is a novel, xenogeneic-free formulation that delays cellular senescence and maintains tissue homeostasis.
- This SF-ACM formulation demonstrates potential as a safe and effective strategy for suppressing cellular aging.
- Findings support SF-ACM's translational promise for regenerative medicine and anti-aging interventions by restoring stem cell function and ameliorating tissue aging.
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