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Expression and unique functions of four nuclear factor of activated T cells isoforms in non-small cell lung cancer

Zhao-Li Chen1, Shou-Hua Zhao, Zhen Wang

  • 1Department of Thoracic Surgery, Cancer Institute and Hospital, Chinese Academy of Medical Sciences, Beijing 100021, PR China.

Chinese Journal of Cancer
|January 4, 2011
PubMed

Insights

Nuclear factor of activated T cells (NFAT) and calcineurin are upregulated in non-small cell lung cancer (NSCLC). NFAT1 overexpression correlates with poorer survival in NSCLC patients, while NFAT4 and calcineurin expression are linked to specific subtypes and differentiation.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Signaling

Background:

  • Nuclear factor of activated T cells (NFAT) are transcription factors crucial for cellular processes.
  • Calcineurin is a key regulator of NFAT activation in human cells.
  • The role of NFAT isoforms and calcineurin in non-small cell lung cancer (NSCLC) remains to be fully elucidated.

Purpose of the Study:

  • To investigate the expression levels of NFAT1, NFAT2, NFAT3, NFAT4, and calcineurin in NSCLC tissues.
  • To analyze the correlation between the expression of these proteins and clinicopathological characteristics of NSCLC patients.
  • To determine the prognostic significance of NFAT and calcineurin expression in NSCLC.

Main Methods:

  • Tumor and adjacent normal tissues from 159 NSCLC patients were collected for tissue microarray construction.
  • Immunohistochemistry was employed to assess the protein levels of NFAT1, NFAT2, NFAT3, NFAT4, and calcineurin.
  • Statistical analyses, including chi-squared tests and correlation analysis, were performed to evaluate expression patterns and clinical associations.

Main Results:

  • NFAT1, NFAT2, NFAT3, NFAT4, and calcineurin showed significantly higher expression in NSCLC tumor tissues compared to normal tissues.
  • NFAT1 overexpression was associated with adenocarcinoma, lymph node metastasis, advanced stage (II-III), and poorer patient survival.
  • NFAT4 and calcineurin expression were significantly higher in squamous cell carcinoma and associated with differentiation grade, with calcineurin also linked to gender.

Conclusions:

  • NFAT1 expression is implicated in the progression of lung adenocarcinoma and serves as a potential prognostic marker.
  • NFAT4 and calcineurin are differentially expressed in NSCLC subtypes and are associated with tumor differentiation, suggesting their involvement in specific lung cancer pathobiology.

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