Positive autoregulation of the transcription factor Pax6 in response to increased levels of either of its major isoforms, Pax6 or Pax6(5a), in cultured cells
2006
Pax6 and Its Isoforms in Cell Regulation
publication
Evidence: moderate
Author Information
Author(s): Jeni Pinson, Ian T. Simpson, John O. Mason, David J. Price
Primary Institution: University of Edinburgh
Hypothesis
Does overexpression of Pax6 or Pax6(5a) lead to increased expression of endogenous Pax6?
Conclusion
Pax6 can up-regulate its own production from the endogenous locus, maintaining physiological ratios of its isoforms.
Supporting Evidence
- Both Pax6 and Pax6(5a) increased the levels of each other in transfected cells.
- Endogenous Pax6 expression was activated by the introduction of either isoform.
- The ratio of Pax6 to Pax6(5a) remained close to physiological levels.
- Overexpression of Pax6 promoted neurogenesis in Neuro2A cells.
Takeaway
When scientists added more Pax6 or Pax6(5a) to cells, the cells made more of both types of Pax6, which helps keep the right balance.
Methodology
The study involved overexpressing Pax6 and Pax6(5a) in Neuro2A and NIH3T3 cells and measuring the resulting protein and mRNA levels.
Limitations
The study was conducted in cell lines, which may not fully replicate in vivo conditions.
Statistical Information
P-Value
p<0.01
Statistical Significance
p<0.01
Digital Object Identifier (DOI)
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