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Peptide C16 derived from laminin, regulate the expression of potential biomarkers of breast cancer.

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Author(s):
Basilio Smuczek
Total Authors: 1
Document type: Master's Dissertation
Press: São Paulo.
Institution: Universidade de São Paulo (USP). Instituto de Ciências Biomédicas (ICB/SDI)
Defense date:
Examining board members:
Ruy Gastaldoni Jaeger; Taize Machado Augusto; Fernanda Ortis
Advisor: Ruy Gastaldoni Jaeger
Abstract

Breast cancer is an important public health. The microenvironment in which cancer cells are found contains molecules such as laminin and its bioactive peptides that influence tumor biology. Previous study conducted in the laboratory showed that the C16 peptide derived from laminin, increases the gene expression of GPNMB and SPOCK1. In this work, we demonstrate that the C16 peptide increased molecular levels of GPNMB and SPOCK in malignant cells MDA-MB-231e MCF-7 cells compared with normal cells MCF-10A. C16 significantly stimulated invasion of MDA-MB-231 cells. GPNMB silencing decreased cell invasion triggered by C16. Contextualizing in vivo our in vitro results, tissue microarrays immunohistochemistry showed that the presence of GPNMB and SPOCK are significantly higher in breast cancer. Thus, C16 regulates the levels of GPNMB and SPOCK in malignant breast cells. C16 and cooperate GPNMB regulating the invasion of MDA-MB-231 cells. SPOCK and GPNMB were more detected in breast cancer compared to normal breast. (AU)