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[Cholecystokinin-B/gastrin receptor is a novel molecular probe for human small cell lung cancer]
Y Matsumori1, N Katakami, N Iwata
1Department of Medicine, Kobe University School of Medicine.
Abstract:
Cloning of CCK-B/gastrin receptor cDNAs showed that they possess the feature of serpentine G protein coupled receptors. In this study, the receptor mRNA was detected selectively in all SCLCs (10 cases) with a RT-PCR assay. By contrast, it was detectable in only one of thirteen squamous cell carcinomas or twenty-one adenocarcinomas of lung. Thus, CCK-B/gastrin receptor has been demonstrated to provide a novel molecular marker for the diagnosis of small cell lung cancer (SCLC) by using biopsy specimens.
Insights
The CCK-B/gastrin receptor is selectively found in small cell lung cancer (SCLC). This discovery offers a new molecular marker for diagnosing SCLC using biopsy samples.
Area of Science:
- Molecular biology
- Oncology
- Gastroenterology
Context:
- The CCK-B/gastrin receptor is a serpentine G protein-coupled receptor.
- Previous research involved cloning CCK-B/gastrin receptor cDNAs.
Purpose:
- To investigate the presence of CCK-B/gastrin receptor mRNA in different types of lung cancer.
- To determine if CCK-B/gastrin receptor can serve as a diagnostic marker for small cell lung cancer (SCLC).
Summary:
- CCK-B/gastrin receptor mRNA was detected in all 10 small cell lung cancer (SCLC) cases using RT-PCR.
- The receptor mRNA was found in only one of 13 squamous cell carcinomas and 21 adenocarcinomas of the lung.
- This selective expression suggests CCK-B/gastrin receptor is a potential biomarker for SCLC.
Impact:
- Provides a novel molecular marker for the diagnosis of small cell lung cancer (SCLC).
- Enables diagnosis using readily available biopsy specimens.
- May lead to earlier and more accurate SCLC detection and treatment.
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