VPAC2 Receptor Signaling Promotes Growth and Immunosuppression in Pancreatic Cancer
View abstract on PubMed
Summary
This summary is machine-generated.Vasoactive intestinal peptide (VIP) signaling through VIP receptor 2 (VPAC2) in pancreatic cancer cells promotes tumor growth and immune evasion. Blocking VPAC2 may improve immunotherapy effectiveness for pancreatic ductal adenocarcinoma (PDAC).
Area Of Science
- Oncology
- Immunology
- Molecular Biology
Background
- Pancreatic ductal adenocarcinoma (PDAC) has a complex tumor microenvironment contributing to drug resistance.
- Vasoactive intestinal peptide (VIP) is overexpressed in PDAC and targets VIP receptors on T cells, sensitizing PDAC to immunotherapy.
Purpose Of The Study
- To investigate the role of autocrine VIP signaling via VIP receptor 2 (VPAC2) in PDAC.
- To determine if VPAC2 signaling impacts tumor growth, immune evasion, and response to immunotherapy.
Main Methods
- Analysis of VIP and VPAC2 coexpression in PDAC patient samples.
- Investigated VPAC2 activation effects on gene expression (Piwi-like RNA-mediated gene silencing 2, TGFβ1) in PDAC cells.
- Utilized mouse models of PDAC to assess tumor growth and immunotherapy response after VPAC2 manipulation.
Main Results
- High VIP and VPAC2 coexpression correlated with reduced relapse-free survival in PDAC patients.
- VPAC2 activation in PDAC cells promoted clonogenic growth and increased TGFβ1 expression, inhibiting T-cell function.
- Loss of VPAC2 in PDAC cells reduced tumor growth and enhanced sensitivity to anti-PD-1 immunotherapy in mouse models.
Conclusions
- Autocrine VIP/VPAC2 signaling promotes PDAC growth and immune suppression.
- VPAC2 is a potential therapeutic target for PDAC treatment.
- Targeting VPAC2 may enhance the efficacy of immunotherapy for pancreatic cancer.
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