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Human Pseudoislet System for Synchronous Assessment of Fluorescent Biosensor Dynamics and Hormone Secretory Profiles

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Signalling to and from the secretory pathway.

Hesso Farhan¹, Catherine Rabouille

¹Biozentrum, University of Basel, Klingelbergstrasse 50/70, Basel, Switzerland. hesso.farhan@bitg.ch

Journal of Cell Science

|December 29, 2010

Summary

Cells use the secretory pathway for protein transport. This pathway dynamically interacts with cellular signaling, allowing cells to adapt to environmental changes and control protein secretion.

Area of Science:

Cell Biology
Molecular Biology
Cellular Signaling

Background:

The secretory pathway is crucial for protein transport to the plasma membrane and extracellular space, essential for cell growth, survival, and communication.
This pathway must adapt to diverse internal and external stimuli, involving complex regulatory mechanisms.
Kinases activated by environmental cues signal from the plasma membrane to modulate the secretory pathway's structure and function.

Purpose of the Study:

To highlight recent advancements in understanding the interplay between the secretory pathway and cellular signaling.
To emphasize the bidirectional regulation between these two critical cellular systems.
To explore how signaling initiated at early secretory pathway membranes influences cellular outcomes.

Main Methods:

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This commentary synthesizes findings from recent research publications.
It focuses on signaling pathways originating from both the plasma membrane and early secretory pathway membranes.
The review integrates knowledge on kinase-mediated regulation and spatial organization of signaling.

Main Results:

The plasma membrane and early secretory pathway membranes act as signaling hubs that mutually regulate each other.
Signaling cascades initiated at the early secretory pathway can spatially organize cellular signals, leading to distinct cellular responses.
Kinase-mediated signaling from the plasma membrane remodels the secretory pathway architecture and controls secretion capacity.

Conclusions:

The secretory pathway and cellular signaling pathways are intricately linked through mutual regulation.
Understanding this crosstalk is vital for comprehending cellular adaptation, homeostasis, and response to stimuli.
Spatial organization of signaling by the early secretory pathway offers novel insights into cellular function.