Protein-tyrosine kinase and protein-serine/threonine kinase expression in human gastric cancer cell lines

Jyh Shi Lin, Chi Wei Lu, Chang Jen Huang, Peng Fyn Wu, Daniel Robinson, Hsing Jien Kung, Chin Wen Chi, Chew Wun Wu, Wen Kang Yang, Jacqueline J.K. Whang-Peng, Wen Chang Lin

Research output: Contribution to journalArticlepeer-review

23 Scopus citations


Protein kinases play key roles in cellular functions. They are involved in many cellular functions including; signal transduction, cell cycle regulation, cell division, and cell differentiation. Alterations of protein kinase by gene amplification, mutation or vital factors often induce tumor formation and tumor progression toward malignancy. The identification and cloning of kinase genes can provide a better understanding of the mechanisms of tumorigenesis as well as diagnostic tools for tumor staging. In this study, we have used degenerated polymerase-chain-reaction primers according to the consensus catalytic domain motifs to amplify protein kinase genes (protein-tyrosine kinase, PTK, and protein-serine/threonine kinase, PSK) from human stomach cancer cells. Following amplification, the protein kinase molecules expressed in the gastric cancer cells were cloned into plasmid vectors for cloning and sequencing. Sequence analysis of polymerase-chain- reaction products resulted in the identification of 25 protein kinases, including two novel ones. Expression of several relevant PTK/PSK genes in gastric cancer cells and tissues was further substantiated by RT-PCR using gene-specific primers. The identification of protein kinases expressed or activated in the gastric cancer cells provide the framework to understand the oncogenic process of stomach cancer.

Original languageEnglish (US)
Pages (from-to)101-110
Number of pages10
JournalJournal of Biomedical Science
Issue number2
StatePublished - 1998
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Endocrinology, Diabetes and Metabolism
  • Molecular Biology
  • Clinical Biochemistry
  • Cell Biology
  • Biochemistry, medical
  • Pharmacology (medical)


  • Gastric cancer
  • Protein serine/threonine kinase
  • Protein tyrosine kinase
  • RT-PCR


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