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Archives in Cancer Research

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Investigation of LRRC24, a putative negative regulator of ErbB receptor tyrosine kinases

International Conference on Cancer Epigenetics and Biomarkers
October 26-28, 2017 Osaka, Japan

Amber Andrews

Hampton University, Virginia, USA

Posters & Accepted Abstracts: Arch Can Res

Abstract:

LRRC24 is a 513-amino acid transmembrane protein with a domain organization very similar to Kekkon-1. Preliminary data from the Fennell lab has revealed that LRRC24 decreases ErbB receptor expression as efficiently as LRIG1, strongly suggesting that LRRC24 is a negative regulator of the ErbB family of RTKs. Furthermore, LRRC24 is expressed in the murine mammary gland and the epithelium of the healthy human breast but may be decreased in breast cancer. Analysis of the Weigelt breast cancer dataset demonstrates that LRRC24 expression inversely correlates with time to metastasis, suggesting that LRRC24 could be a metastasis suppressor. Furthermore, LRRC24 is decreased in prostate adenocarcinoma compared to normal prostate. Collectively, our preliminary data highlight several key features of LRRC24 which suggest it could be an important growth suppressor including its ability to negatively regulate oncogenic ErbB RTKs, its expression in normal tissue in which ErbBs are expressed and its potential loss in cancer. Author hypothesize that LRRC24 is a novel negative regulator of the ErbB family of RTKs and that it functions to suppress ErbB-driven tumor cell proliferation, motility and/or invasion.