Mucin 5AC-Mediated CD44/ITGB1 Clustering Mobilizes Adipose-Derived Mesenchymal Stem Cells to Modulate Pancreatic Cancer Stromal Heterogeneity
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Summary
This summary is machine-generated.Secreted mucin 5AC (MUC5AC) drives pancreatic cancer progression by mobilizing adipose-derived mesenchymal stem cells (AD-MSCs). These cells then contribute to tumor stroma heterogeneity, impacting patient prognosis.
Area Of Science
- Oncology
- Cancer Biology
- Cell Biology
Background
- Secreted mucin 5AC (MUC5AC) is linked to pancreatic cancer (PC) progression and chemoresistance.
- Genetic ablation of Muc5ac significantly alters tumor stroma.
- Understanding fibroblast heterogeneity is crucial for improving PC outcomes.
Purpose Of The Study
- To investigate the role of MUC5AC in pancreatic cancer-associated stromal heterogeneity.
- To identify the mechanisms by which MUC5AC influences stromal cell behavior.
Main Methods
- Utilized autochthonous murine PC models (KC and KCM) and co-implanted allografts.
- Assessed AD-MSC proliferation, migration, and surface markers via live-cell imaging and flow cytometry.
- Investigated MUC5AC-interactome using mass spectrometry and ELISA.
Main Results
- KCM tumors showed reduced α-smooth muscle actin and fibronectin compared to KC tumors.
- MUC5AC promotes AD-MSC migration by clustering CD44/CD29, activating Rac1.
- AD-MSCs contribute to cancer-associated fibroblasts in a Muc5ac-dependent manner.
Conclusions
- MUC5AC enriches in adipose tissue, enhancing AD-MSC mobilization.
- Recruited AD-MSCs proliferate and contribute to pancreatic tumor stromal heterogeneity.

