Human cyclin D1 oncogene and esophageal squamous cell carcinoma

Hiroshi Nakagawa, Lawrence Zukerberg, Kazumi Togawa, Stephen J. Meltzer, Tetsuro Nishihara, Anil K. Rustgi

Research output: Contribution to journalArticlepeer-review

Abstract

Background. Oncogene activation and tumor suppressor gene inactivation have been implicated in the genetic basis of esophageal squamous cell carcinoma (ESCC). Cyclin D1, an oncogene that has a critical role in G1 progression of the cell cycle, has been observed to be amplified in carcinomas of the breast and head and neck, and translocated in parathyroid adenomas and centrocytic lymphomas. Methods. Established ESCC cell lines were assayed for cyclin D1 amplification and overexpression by Southern, Northern, and Western blot analyses. In addition, cyclin D1 overexpression was determined in primary tumors and adjacent normal mucosa by differential polymerase chain reaction (PCR) and immunohistochemical staining. Results. The authors observed that approximately 50% of ESCC cell lines with cyclin D1 DNA amplification also had RNA and protein overexpression. Related genes, cyclin D2 and D3, were not amplified or overexpressed in these cell lines with rare exception. The cyclin D1 protein was able to associate with the cell‐cycle‐dependent kinases, cdk4 and cdk6, but not always with proliferating cell nuclear antigen in selected cell lines tested, representing a novel finding. In addition, approximately 50% of primary tumors had cyclin D1 overexpression that was not present in adjacent normal mucosa. Cyclin D1 over‐expression based on PCR correlated with enhanced cyclin D1 protein nuclear staining in malignant cells. Conclusion. Cyclin D1 is amplified and overexpressed in ESCC and may be important in its molecular pathogenesis. Cancer 1995; 76:541–9.

Original languageEnglish (US)
Pages (from-to)541-549
Number of pages9
JournalCancer
Volume76
Issue number4
DOIs
StatePublished - Aug 15 1995
Externally publishedYes

Keywords

  • cyclin D1
  • esophageal squamous cell carcinoma
  • gene amplification
  • oncogene
  • polymerase chain reaction

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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