S100B and APP Affect Neural Progenitors in Down Syndrome
Author Information
Author(s): Lu Jie, Esposito Giuseppe, Scuderi Caterina, Steardo Luca, Delli-Bovi Laurent C., Hecht Jonathan L., Dickinson Bryan C., Chang Christopher J., Mori Takashi, Sheen Volney
Primary Institution: Beth Israel Deaconess Medical Center, Harvard Medical School
Hypothesis
Does the overexpression of S100B and APP in Down syndrome neural progenitors lead to impaired neurogenesis and increased gliocentric characteristics?
Conclusion
The study found that S100B and APP overexpression in Down syndrome neural progenitors leads to increased cell death and a shift towards gliocentric progenitor phenotypes, impairing neuronal production.
Supporting Evidence
- DS neural progenitors show increased oxidative stress and cell death.
- S100B and APP levels are elevated in DS neural progenitors.
- Overexpression of S100B and APP leads to gliocentric shifts in progenitor phenotypes.
- DS HNPs exhibit increased apoptosis compared to wild-type controls.
- Treatment with S100B or APP increases mitochondrial dysfunction.
- RAGE blockade reduces the effects of S100B and APP on DS HNPs.
- DS HNPs have a decreased expression of neuronal markers and increased glial markers.
Takeaway
In Down syndrome, certain proteins make brain cells die more and turn into glial cells instead of neurons, which is not good for brain development.
Methodology
The study involved isolating human neural progenitors from fetal frontal cortex and analyzing their response to S100B and APP overexpression.
Potential Biases
Potential bias in sample selection and the interpretation of results based on the specific focus on Down syndrome neural progenitors.
Limitations
The study primarily focuses on in vitro findings, which may not fully represent in vivo conditions.
Participant Demographics
Fetal human neural progenitors from individuals with Down syndrome and age-matched controls.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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