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Isolating Intestinal Stem Cells from Adult Drosophila Midguts by FACS to Study Stem Cell Behavior During Aging
Published on: December 16, 2014
Stem cell aging and plasticity in the Drosophila nervous system
Hakima Flici1, Angela Giangrande
1Institut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM/UDS, Illkirch, France.
Fly
|May 29, 2012
Summary
Neural stem cell (NSC) plasticity decreases with age, impacting regenerative medicine. Old neuroblasts (NBs) show limited conversion and may develop cancer-like intermediate identities when forced to change fate.
Area of Science:
- Neuroscience
- Developmental Biology
- Stem Cell Biology
Background:
- Neural stem cells (NSCs) are highly plastic in vitro but exhibit age-dependent proliferation, quiescence, or apoptosis in vivo.
- The plasticity of NSCs throughout their lifespan is crucial for understanding their therapeutic potential in regenerative medicine.
- The transcription factor Gcm/Glide induces stable glial fate conversion in Drosophila neuroblasts (NBs).
Purpose of the Study:
- To investigate the age-dependent plasticity of Drosophila neural stem cells (neuroblasts).
- To determine if aging affects the ability of neuroblasts to undergo fate conversion.
- To explore the implications of age-related changes in neuroblast plasticity for regenerative medicine and cancer biology.
Main Methods:
- Utilized the Gcm/Glide transcription factor to induce ectopic glial fate conversion in Drosophila neuroblasts (NBs) of varying ages.
- Compared the efficiency and stability of fate conversion in newborn versus old NBs.
- Characterized the resulting cell types, focusing on intermediate phenotypes.
Main Results:
- Drosophila neuroblast (NB) plasticity is age-dependent; newborn NBs are more readily converted to glia than old NBs.
- A subset of old NBs, when converted, resulted in cells with a stable intermediate NB/glia identity.
- This intermediate phenotype resembles that observed in cancer cells.
Conclusions:
- Aging significantly reduces the plasticity of neural stem cells (NSCs), specifically Drosophila neuroblasts (NBs).
- The emergence of stable intermediate cell identities in aged NBs suggests a link between aging, stem cell fate, and cancer.
- Findings challenge the notion of universal NSC plasticity and have implications for stem cell-based therapies.
