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Sequencing of the tumor suppressor gene TP 53
Barbro Linderholm1, Torbjörn Norberg, Jonas Bergh
1Radiumhemmet, Karolinska Institute and Hospital, Stockholm, Sweden.
Abstract:
The tumour suppressor gene, TP 53 (commonly also called p53) has multiple, important cellular functions involving control of apoptosis, downstream cell cycle regulation via p21 and cyclin dependent kinases, and control of tumour angiogenesis. Somatic mutation of TP 53 is considered to be the most common genetic mutation in human cancer. Mutations of the gene are associated with drug resistance and poor patient prognosis in human cancers. Immunohistochemistry to detect mutated TP 53 is unreliable and molecular biology approaches are therefore preferable for its assessment. This chapter describes protocols for the 'gold standard', but perhaps complex and time consuming, methods for sequencing TP 53, by cDNA and genomic based sequencing techniques.
Insights
The TP53 tumor suppressor gene is crucial for cellular functions, but its mutations are common in cancer, leading to poor prognosis. This study details reliable molecular sequencing methods for TP53 gene assessment.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- TP53, a tumor suppressor gene, regulates critical cellular functions including apoptosis, cell cycle, and angiogenesis.
- Somatic mutations in TP53 are the most frequent genetic alterations observed in human cancers.
- TP53 mutations correlate with drug resistance and adverse patient outcomes.
Purpose of the Study:
- To provide detailed protocols for the accurate molecular assessment of TP53 gene mutations.
- To establish reliable sequencing methods as an alternative to unreliable immunohistochemistry for TP53 detection.
Main Methods:
- Description of 'gold standard' sequencing protocols for the TP53 gene.
- Inclusion of both cDNA and genomic-based sequencing techniques.
- Emphasis on molecular biology approaches for precise TP53 assessment.
Main Results:
- Detailed protocols for TP53 sequencing are presented.
- The methods described are presented as the preferred approach over immunohistochemistry.
- The chapter focuses on complex, time-consuming, yet accurate sequencing techniques.
Conclusions:
- Accurate assessment of TP53 mutations is vital for understanding cancer development and prognosis.
- Molecular sequencing methods, though complex, offer reliable detection of TP53 alterations.
- Standardized protocols are essential for consistent and dependable TP53 gene analysis in cancer research.
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