Elevated KRAS protein level is associated with better survival in pancreatic cancer
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View abstract on PubMed
Summary
This summary is machine-generated.High KRAS protein levels in pancreatic cancer tumors correlate with better patient survival, despite poor association with KRAS mRNA levels or mutation type. This finding offers new insights into KRAS in pancreatic ductal adenocarcinoma (PDAC).
Area Of Science
- Oncology
- Molecular Biology
- Biochemistry
Background
- Activating KRAS mutations are nearly universal in pancreatic ductal adenocarcinoma (PDAC), often linked to poorer outcomes.
- While KRAS mutation and mRNA levels are associated with prognosis, KRAS protein expression's clinical significance remains less understood.
- This study investigates the prognostic value of KRAS protein levels in PDAC, alongside its relationship with mRNA expression and mutation status.
Purpose Of The Study
- To determine the prognostic significance of KRAS protein levels in pancreatic ductal adenocarcinoma (PDAC).
- To explore the association between KRAS protein levels, KRAS mRNA expression, and specific KRAS mutation types.
- To evaluate the relationship between KRAS protein expression and overall survival (OS) in PDAC patients.
Main Methods
- Screened 41 PDAC tumors for seven common KRAS mutations using Wobble-enhanced ARMS.
- Acquired whole transcriptome and proteome profiles via mRNA microarrays and mass spectrometry (HiRIEF LC-MS/MS).
- Correlated KRAS protein levels with KRAS mRNA expression, mutation status, and overall survival (OS).
Main Results
- KRAS mutations were found in 88% of tumors; p.G12D and p.G12V were most frequent.
- KRAS protein levels showed no significant correlation with KRAS mRNA levels or mutation type.
- High KRAS protein levels were significantly associated with better OS (P < 0.01), while p.G12V mutation correlated with worse OS (P < 0.05).
Conclusions
- KRAS protein expression is a poor indicator of mRNA levels and mutation type in PDAC.
- Elevated KRAS protein levels in tumors are linked to improved clinical outcomes for PDAC patients.
- This suggests KRAS protein level, independent of mutation, may be a crucial prognostic biomarker in PDAC.
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