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Clinicopathological characteristics of breast carcinomas with allelic loss in the p73

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Abstract

p73, a new member of the p53 family, has been mapped to chromosome 1p 36, a region where loss of heterozygosity (LOH) is frequently observed in primary human tumors. Allelic loss studies involving the 1p arm in breast carcinomas offer rates ranging from 13% to 75%, depending on the genetic interval being studied. We investigated LOH in an intragenic microsatellite marker, and those centromerically flanking the p73 gene, at 1p 36, and their correlations with patient age and 10 pathologic parameters in a series of 193 breast carcinomas. The LOH analysis was performed by amplifying DNA by PCR, using five markers of the 1p 36 region (p73P1, D1S2694, D1S214, D1S2666 and D1S450). LOH was found in at least one of these markers in 27% of tumors. When we established the comparison between tumors with and without LOH and the distribution of the 10 pathologic parameters considered, we observed statistically significant differences in association with higher histologic grade (p = 0.02), more advanced pathological stage (p = 0.02), peritumoral vessel involvement (p = 0.04) and poorly differentiated carcinomas (p = 0.01), as well as in tumors that concomitantly exhibited lymph node metastases, peritumoral vessel involvement and absence of steroid receptors (p = 0.02). These data suggest that LOH in the p73 region could be pathogenically related to breast cancer and possibly to a poor tumor prognosis.

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Authors and Affiliations

  1. Departments of Medical Oncology Pathology, Madrid, Spain

    Gemma Dominguez, Javier Silva, Jose M. Silva, Jose M. Garcia, Celia Miralles, Mariano Provencio, Pilar España & Felix Bonilla

  2. Pathology, Clinica Puerta de Hierro, Madrid, Spain

    Oscar Rodriguez

  3. Department of Pathology, Hospital Santa Cristina, Madrid, Spain

    Eugenia Jareño

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  1. Gemma Dominguez
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  2. Javier Silva
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Dominguez, G., Silva, J., Silva, J.M. et al. Clinicopathological characteristics of breast carcinomas with allelic loss in the p73. Breast Cancer Res Treat 63, 17–22 (2000). https://doi.org/10.1023/A:1006446709715

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