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Updated: Feb 18, 2026

Efficient Differentiation of Pluripotent Stem Cells to NKX6-1+ Pancreatic Progenitors
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Efficient Differentiation of Pluripotent Stem Cells to NKX6-1+ Pancreatic Progenitors

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The ATPase activity of Asna1/TRC40 is required for pancreatic progenitor cell survival

Stefan Norlin1, Vishal Parekh1, Helena Edlund2

  • 1Umeå Centre for Molecular Medicine, Umeå University, SE-901 87 Umeå, Sweden.

Development (Cambridge, England)
|November 29, 2017
PubMed

Insights

Asna1 (also known as TRC40) protein is crucial for pancreatic progenitor cell survival. Its inactivation leads to pancreatic agenesis by disrupting Golgi integrity and triggering apoptosis.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Developmental Biology

Background:

  • Asna1 (TRC40) facilitates tail-anchored protein insertion into the endoplasmic reticulum.
  • It plays roles in vesicle transport and protein chaperoning during cellular stress.
  • Dysfunction in Asna1 may impact organ development and cellular homeostasis.

Purpose of the Study:

  • To investigate the role of Asna1 in pancreatic progenitor cell (MPC) function and survival.
  • To elucidate the molecular mechanisms underlying Asna1 deficiency in pancreatic development.
  • To determine the impact of Asna1 inactivation on Golgi apparatus and protein trafficking.

Main Methods:

  • Asna1 gene inactivation in pancreatic progenitor cells.
  • Analysis of Golgi morphology and localization of SNARE proteins (syntaxin 5 and 6).
  • Assessment of integrated stress response signaling and apoptosis pathways (p53 modulation).

Main Results:

  • Asna1 inactivation caused Golgi fragmentation and altered syntaxin 5/6 distribution.
  • Asna1-deficient MPCs activated integrated stress response and underwent apoptosis, leading to pancreatic agenesis.
  • Asna1's ATPase activity and CXXC motif were essential for Golgi integrity and MPC survival.

Conclusions:

  • Asna1 ATPase activity is vital for pancreatic MPC survival, likely by inhibiting p53-mediated apoptosis.
  • Perturbations in Asna1 function disrupt Golgi homeostasis and protein transport, impacting pancreatic development.
  • Targeting Asna1 may offer therapeutic potential for pancreatic developmental disorders.

Keywords:
ApoptosisAsna1/TRC40Impaired differentiationIntegrated stress responseMousePancreatic hypoplasiaPancreatic progenitor cell

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