Related Experiment Video
Updated: Mar 20, 2026
In Vitro Culture of Epithelial Cells from Different Anatomical Regions of the Human Amniotic Membrane
Published on: November 28, 2019
Conditioned medium derived from rat amniotic epithelial cells confers protection against inflammation, cancer, and
Clara Di Germanio1,2, Michel Bernier2, Michael Petr2
1Faculty of Veterinary Medicine, University of Teramo, Teramo, Italy.
Insights
Rat amniotic epithelial cells (AECs) show stemness and can differentiate. Their conditioned medium reduces inflammation and tumor growth, offering potential for regenerative and anti-aging therapies.
Area of Science:
- Stem Cell Biology
- Regenerative Medicine
- Immunology
Background:
- Amniotic epithelial cells (AECs) are fetal stem cells with therapeutic potential.
- Human AECs are well-studied, but rat AECs remain largely unexplored.
- Rat models are crucial for medical research, necessitating understanding of rat AECs.
Purpose of the Study:
- To characterize rat AECs for stemness and differentiation potential.
- To investigate the therapeutic effects of rat AEC-conditioned medium.
- To explore applications in regenerative medicine, inflammation, and aging.
Main Methods:
- Isolation and characterization of rat AECs.
- Assessment of stemness markers (Sox2, Nanog, Oct4) and osteogenic differentiation.
- In vitro and in vivo studies using rat AEC-conditioned medium on macrophages and tumor cells.
- Evaluation of senescence-associated secretory phenotype in human fibroblasts.
Main Results:
- Rat AECs exhibit stemness properties and osteogenic differentiation capacity.
- Rat AEC-conditioned medium demonstrated anti-inflammatory effects by reducing TNF-alpha expression.
- Conditioned medium inhibited tumor cell proliferation in vitro and in vivo.
- Rat AEC-conditioned medium reduced the senescence-associated secretory phenotype.
Conclusions:
- Rat AECs possess stem cell characteristics and therapeutic potential.
- Rat AEC-derived factors can modulate inflammatory responses and inhibit tumor growth.
- These findings support AECs as a promising source for regenerative medicine and anti-aging strategies.
Abstract:
Amniotic epithelial cells (AECs) are a class of fetal stem cells that derives from the epiblast and resides in the amnion until birth. AECs are suitable candidates for regenerative medicine because of the ease of collection, their low immunogenicity and inability to form tumors after transplantation. Even though human AECs have been widely investigated, the fact remains that very little is known about AECs isolated from rat, one of the most common animal models in medical testing. In this study, we showed that rat AECs retained stemness properties and plasticity, expressed the pluripotency markers Sox2, Nanog, and Oct4 and were able to differentiate toward the osteogenic lineage. The addition of conditioned medium collected from rat AECs to lipopolysaccharide-activated macrophages elicited anti-inflammatory properties through a decrease of Tnfa expression and slowed tumor cell proliferation in vitro and in vivo. The senescence-associated secretory phenotype was also significantly lower upon incubation of senescent human IMR-90 fibroblast cells with conditioned medium from rat AECs. These results confirm the potential of AECs in the modulation of inflammatory mechanisms and open new therapeutic possibilities for regenerative medicine and anti-aging therapies as well.
