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ROS1 Expression in Invasive Ductal Carcinoma of the Breast Related to Proliferation Activity
Yonsei Medical Journal ; : 650-657, 2013.
Article in English | WPRIM | ID: wpr-193938
ABSTRACT

PURPOSE:

ROS1 is an oncogene, expressed primarily in glioblastomas of the brain that has been hypothesized to mediate the effects of early stage tumor progression. In addition, it was reported that ROS1 expression was observed in diverse cancer tissue or cell lines and ROS1 is associated with the development of several tumors. However, ROS1 expression has not been studied in breast cancer to date. Therefore, we investigated ROS1 expression at the protein and gene level to compare expression patterns and to verify the association with prognostic factors in invasive ductal carcinoma (IDC) of the breast. MATERIALS AND

METHODS:

Tissue samples from 203 patients were used. Forty-six cases were available for fresh tissue. We performed immunohistochemical staining and real-time polymerase chain reaction (PCR).

RESULTS:

ROS1 expression was significantly lower in proportion to higher histologic grade, higher mitotic counts, lower estrogen receptor expression, and a higher Ki-67 proliferation index, although ROS1 expression was not significantly associated with the survival rate. The result of real-time PCR revealed similar trends, however not statistically significant.

CONCLUSION:

Higher ROS1 expression may be associated with favorable prognostic factors of IDC and its expression in IDC is related to the proliferation of tumor cells.
Subject(s)

Full text: Available Index: WPRIM (Western Pacific) Main subject: Prognosis / Protein-Tyrosine Kinases / Breast Neoplasms / Immunohistochemistry / Survival Analysis / Proto-Oncogene Proteins / Carcinoma, Ductal, Breast / Cell Proliferation / Neoplasm Grading Type of study: Prognostic study Limits: Adult / Aged / Aged80 / Female / Humans Language: English Journal: Yonsei Medical Journal Year: 2013 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Prognosis / Protein-Tyrosine Kinases / Breast Neoplasms / Immunohistochemistry / Survival Analysis / Proto-Oncogene Proteins / Carcinoma, Ductal, Breast / Cell Proliferation / Neoplasm Grading Type of study: Prognostic study Limits: Adult / Aged / Aged80 / Female / Humans Language: English Journal: Yonsei Medical Journal Year: 2013 Type: Article