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Correlation of Glut-1 glucose transporter expression with
1Department of Radiology, Kanazawa Medical University, Ishikawa, Japan.
European Journal of Nuclear Medicine
|February 24, 2001
Summary
Positron emission tomography (PET) with [18F]2-fluoro-2-deoxy-D-glucose (FDG) uptake is linked to Glut-1 glucose transporter expression in non-small cell lung cancer. Bronchioloalveolar carcinomas show lower Glut-1 expression and FDG uptake compared to other lung adenocarcinomas.
Area of Science:
- Oncology
- Nuclear Medicine
- Molecular Imaging
Background:
- Positron emission tomography (PET) using [18F]2-fluoro-2-deoxy-D-glucose ([18F]FDG) is a key imaging modality for non-small cell lung cancer (NSCLC).
- However, [18F]FDG PET may yield false-negative results, particularly for bronchioloalveolar carcinoma (BAC).
- Glucose transporter 1 (Glut-1) is implicated in glucose metabolism and cancer progression.
Purpose of the Study:
- To investigate the correlation between Glut-1 glucose transporter expression and [18F]FDG uptake in various subtypes of non-small cell lung cancer.
- To determine if Glut-1 expression levels can explain the variable [18F]FDG uptake observed in different NSCLC subtypes, especially BAC.
Main Methods:
- Histological analysis of 34 NSCLC cases (including 7 BACs) after thoracotomy.
- Semi-quantitative analysis of [18F]FDG uptake using standardized uptake values (SUVs) from PET scans.
- Immunohistochemical assessment of Glut-1 expression, evaluating both the intensity and percentage of positive area in tumor tissues.
Main Results:
- Bronchioloalveolar carcinomas (BACs) demonstrated significantly lower Glut-1 expression (6/7 negative) and [18F]FDG uptake (SUV 1.25 ± 0.75) compared to non-bronchioloalveolar adenocarcinomas (non-BAC) (SUV 3.94 ± 1.93).
- A strong positive correlation was found between Glut-1 expression (both percentage of positive area and intensity) and [18F]FDG uptake (SUVs) across all NSCLC subtypes.
- Glut-1 expression and [18F]FDG uptake correlated with the degree of cell differentiation in adenocarcinomas.
Conclusions:
- Glut-1 glucose transporter expression is significantly associated with [18F]FDG uptake in non-small cell lung cancer.
- Lower Glut-1 expression and [18F]FDG uptake in bronchioloalveolar carcinomas may contribute to their potential for negative PET findings.
- These findings highlight the role of Glut-1 in NSCLC metabolism and its impact on PET imaging characteristics.