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Nuclear BAG-1 expression reflects malignant potential in colorectal carcinomas
R Kikuchi1, T Noguchi, S Takeno
1Department of Surgery II, Oita Medical University, 1-1 Idaigaoka, Hasama-machi, Oita 879-5593, Japan. kikuchir@oita-med.ac.jp
British Journal of Cancer
|October 29, 2002
Summary
Nuclear BAG-1 expression predicts distant metastasis and poor survival in colorectal cancer patients. This finding highlights nuclear BAG-1 as a key prognostic indicator for disease progression and mortality.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- BAG-1 (Bcl-2-associated athanogene 1) is an anti-apoptotic protein interacting with Bcl-2.
- Understanding BAG-1's role in colorectal cancer (CRC) is crucial for prognostic assessment.
Purpose of the Study:
- To investigate the immunohistochemical staining patterns of BAG-1 in CRC.
- To examine associations between BAG-1 expression and clinicopathological factors, including patient survival.
Main Methods:
- Immunohistochemical analysis of BAG-1 protein expression in 86 colorectal cancer tumor samples.
- Statistical analysis to correlate BAG-1 staining patterns (nuclear vs. cytoplasmic) with clinicopathological factors and survival outcomes.
Main Results:
- Significant variation in BAG-1 staining patterns observed, with 24.4% showing nuclear and 65.1% cytoplasmic staining.
- Nuclear BAG-1 positivity was significantly higher in patients with distant metastasis (55.6%) compared to those without (20.8%; P=0.036).
- Patients with nuclear BAG-1 positive tumors had significantly shorter overall survival (P=0.011).
Conclusions:
- Nuclear BAG-1 expression is a significant predictor of distant metastasis in colorectal cancer.
- Nuclear BAG-1 is an independent prognostic variable for mortality, indicating poor prognosis.
- BAG-1 nuclear expression serves as a valuable predictive factor for colorectal cancer progression and patient outcomes.