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Mutations in novel tumor suppressor gene associated with early onset breast cancer
Date:10/24/2013

ficant association between RINT1 mutations and risk of early onset breast cancer, according to the researchers.

In parallel, an additional 684 women with breast cancer who are members of multiple-case breast cancer families were screened for RINT1 mutations, and six additional rare mutations were identified.

The scientists reported that research identifying RINT1 as a breast cancer susceptibility gene is consistent with prior studies showing that mice that carry a RINT1 mutation spontaneously develop a variety of tumors, including breast cancer, at a combined rate of 81 percent, which is higher than the rate at which breast cancer spontaneously develops in laboratory mice that have a BRCA1 mutation.

In their analysis of the families of women with RINT1 mutations, the researchers found a statistically significant 2 to 3-fold excess of cancers associated with mismatch repair defects, such as those found in patients with hereditary colorectal cancer without polyps. This finding indicates that RINT1 mutations may predispose to several other types of tumors, the scientists reported.

Previous studies have shown that RINT1 serves as a tumor suppressor essential for maintaining the function of the Golgi apparatus, which packages proteins inside the cell, and the integrity of the centrosome, which coordinates mitosis, a stage of cell division that separates two identical sets of chromosomes into newly dividing cells.

The scientists' ASHG abstract is titled: "Rare mutations in RINT1 predispose carriers to early-onset breast cancer."


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Contact: Cathy Yarbrough
press@ashg.org
858-243-1814
American Society of Human Genetics
Source:Eurekalert

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