FSH and ERK Activation Without Internalization
Author Information
Author(s): Vincent Piketty, Elodie Kara, Florian Guillou, Eric Reiter, Pascale Crepieux
Primary Institution: Laboratoire de Physiologie de la Reproduction et des Comportements, Institut National de la Recherche Agronomique/Centre National pour la Recherche Scientifique/Université de Tours/Haras Nationaux/Institut Fédératif de Recherche 135
Hypothesis
Does the FSH receptor require internalization to activate ERK phosphorylation?
Conclusion
The FSH receptor does not need to internalize to activate ERK phosphorylation in response to FSH.
Supporting Evidence
- FSH stimulated ERK phosphorylation in a dose-dependent manner.
- Blocking internalization did not affect ERK phosphorylation levels.
- Overexpression of beta-arrestins increased internalization but did not change ERK activation.
Takeaway
This study shows that the FSH receptor can activate a signaling pathway without needing to be taken inside the cell.
Methodology
HEK 293 cells were transfected with the FSH receptor and various constructs to manipulate internalization, followed by Western blot analysis to measure ERK phosphorylation.
Limitations
The study was conducted in a cell line and may not fully represent in vivo conditions.
Statistical Information
P-Value
p<0.05
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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