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Paternal Insulin-like Growth Factor 2 (Igf2) Regulates Stem Cell Activity During Adulthood
Vilma Barroca1, Daniel Lewandowski1, Agnieszka Jaracz-Ros1
1INSERM UMR 967, 92265 Fontenay-aux-roses cedex, France; CEA/DSV/iRCM, 92265 Fontenay-aux-roses cedex, France; Université Paris-Diderot, Paris 7, 92265 Fontenay-aux-roses cedex, France; Université Paris-Sud, Paris 11, 92265 Fontenay-aux-roses cedex, France.
Ebiomedicine
|December 24, 2016
Summary
Insulin-like Growth Factor 2 (IGF2) is crucial for adult stem cell function. Its deficiency prevents age-related stem cell loss, aiding tissue regeneration and potentially improving regenerative medicine outcomes.
Area of Science:
- Stem cell biology
- Endocrinology
- Aging research
Background:
- Insulin-like Growth Factor 2 (IGF2) is part of the conserved IGF/Insulin pathway regulating growth and lifespan.
- IGF2 is highly expressed during embryonic development and in cancer cells.
- Adult hematopoietic stem cells (HSCs) express IGF2, with its role in adulthood being largely unknown.
Purpose of the Study:
- To investigate the role of IGF2 in adult hematopoietic stem cells (HSCs).
- To determine the impact of IGF2 deficiency on HSC function, tissue homeostasis, and regeneration in adult mice.
Main Methods:
- Analysis of adult HSCs from mice genetically modified to be deficient in IGF2 transcripts.
- Assessment of HSC pool size, self-renewal, differentiation balance, and tissue regeneration capacity.
Main Results:
- IGF2 is specifically expressed in adult HSCs.
- IGF2 deficiency prevented the age-related decline in the HSC pool.
- IGF2 is essential for maintaining tissue homeostasis and regeneration.
- IGF2 levels critically regulate the balance between HSC self-renewal and differentiation, likely via niche interactions.
Conclusions:
- IGF2 plays a vital role in maintaining adult HSC function and preventing age-related stem cell attrition.
- Understanding IGF2's role in HSCs and their niche has significant implications for regenerative medicine and transplantation.
- Targeting IGF2 could enhance the efficacy of regenerative therapies and impact health- and lifespan.
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