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Characterization of a novel gene, STAG1/PMEPA1, upregulated in renal cell carcinoma and other solid tumors

F K Rae1, J D Hooper, D L Nicol

  • 1Centre for Molecular Biotechnology, School of Life Sciences, Queensland University of Technology, Brisbane, Australia.

Molecular Carcinogenesis
|September 25, 2001
PubMed

Insights

A novel gene, solid tumor-associated gene 1 (STAG1), is upregulated in renal cell carcinoma and other solid tumors, suggesting a role in cancer development.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Renal cell carcinoma (RCC) is a significant health concern.
  • Identification of novel cancer-associated genes is crucial for understanding tumorigenesis.

Purpose of the Study:

  • To identify and characterize novel genes involved in solid tumor development.
  • To investigate the expression patterns of a newly identified gene in various cancer types.

Main Methods:

  • Differential display-polymerase chain reaction (DD-PCR) for gene discovery.
  • Full-length cDNA sequencing and mRNA transcript analysis.
  • Gene expression profiling in tumor and normal tissues.
  • Bioinformatic analysis of expressed sequence tag databases.
  • Protein analysis and genomic localization.

Main Results:

  • A novel gene, solid tumor-associated gene 1 (STAG1), was identified and found to be upregulated in 87% of RCC samples.
  • STAG1/PMEPA1 expression was also elevated in stomach, rectal, pancreatic, endometrial, and prostatic adenocarcinomas.
  • Expression was significantly lower in leukemia and lymphoma.
  • Two mRNA transcripts (2.7 and 5 kb) and two protein products (36 and 39 kDa) were identified.
  • The gene is located on chromosome 20q13 and encodes a protein with a putative transmembrane domain.

Conclusions:

  • STAG1/PMEPA1 upregulation in multiple solid tumors suggests its potential role in tumorigenesis.
  • This gene represents a potential biomarker and therapeutic target for various cancers.

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