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Cellular retinoic acid-binding protein in human lung carcinomas
Journal of the National Cancer Institute
|July 1, 1981
Summary
Cellular retinoic acid-binding protein (CRABP) was found in human non-small-cell lung cancer cytosol. Normal lung and small-cell lung cancer tissues did not contain CRABP, suggesting its potential role in non-small-cell lung cancer.
Area of Science:
- Biochemistry
- Oncology
- Molecular Biology
Background:
- Cellular retinoic acid-binding protein (CRABP) plays a role in retinoid metabolism and signaling.
- Retinoids are crucial for cell differentiation, proliferation, and apoptosis.
- Dysregulation of retinoid pathways is implicated in various cancers.
Purpose of the Study:
- To investigate the presence and levels of CRABP in human non-small-cell lung cancer (NSCLC).
- To compare CRABP expression in NSCLC with normal lung tissue and small-cell lung cancer (SCLC).
Main Methods:
- Cytosol extraction from human lung cancer specimens (NSCLC and SCLC) and normal lung tissue.
- Detection and quantification of CRABP using biochemical assays.
Main Results:
- CRABP was detected in the cytosol of all 11 human non-small-cell lung cancer specimens analyzed.
- CRABP was not detected in normal lung tissue or in the single small-cell lung cancer specimen examined.
- The concentration of CRABP in NSCLC cytosol varied significantly, ranging from 48.3 to 426.5 fmol per milligram of protein.
Conclusions:
- The specific presence of CRABP in non-small-cell lung cancer, but not in normal lung or small-cell lung cancer, suggests a potential role in NSCLC development or progression.
- CRABP may serve as a potential biomarker for non-small-cell lung cancer.