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Correlation of allelic losses and clinicopathological factors in 504 primary breast cancers

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Abstract

Background

We have defined 18 chromosomal regions in which allelic losses were frequent among breast cancers. We examined whether specific allelic losses might correlate with any clinicopathological factors.

Methods

We tested DNA from matched normal and tumor tissues for loss of heterozygosity (LOH) at 18 microsatellite loci from a cohort of 504 patients who had undergone surgery for breast cancer.

Results

LOH at 3pl4.3 correlated with a larger size of tumor (greater than 2 cm). LOH at 1p22, 3p25.1, 3pl4.3, or 17q21.1 correlated with loss of estrogen receptors. LOH at as many as eleven regions correlated with loss of progesterone receptor, suggesting that these represent general phenomena associated with progression of cancer. Above all, allelic losses at llq23-24,13ql2,17pl3.3, or 22ql3 significantly correlated with lymph-node metastasis (llq23-24,p = 0.0042; 13ql2,p = 0.0207; 17pl3.3,p = 0.0478; 22ql3,p = 0.0162).

Conclusion

These results suggest that some clinical characteristics of breast cancers are determined by loss of tumor suppressor genes present at specific chromosome regions. Especially, LOH at llq23-24, 13ql2, 17pl3.3, and 22ql3 is a significant predictor of lymph-node metastasis for patients who have undergone surgery for breast cancer, and may serve as a negative prognostic indicator.

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Author information

Correspondence to Takemitsu Nagahata or Akira Hirano or Yoshihito Utada or Shinichi Tsuchiya or Kaoru Takahashi or Takashi Tada or Masujirou Makita or Fujio Kasumi or Futoshi Akiyama or Goi Sakamoto or Yusuke Nakamura or Mitsuru Emi.

Additional information

Reprint requests to Mitsuru Emi, Department of Molecular Biology, Institute of Gerontology, Nippon Medical School, 1-396, Kosugi-cho, Nakahara-ku, Kawasaki 21 1-8533, Japan.

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Cite this article

Nagahata, T., Hirano, A., Utada, Y. et al. Correlation of allelic losses and clinicopathological factors in 504 primary breast cancers. Breast Cancer 9, 208–215 (2002). https://doi.org/10.1007/BF02967591

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Key words

  • Breast cancer
  • Loss of heterozygosity
  • Tumor suppressor gene
  • Human chromosomes
  • Clinicopathological factor