Loss of caveolin-1 and gain of MCT4 expression in the tumor stroma Key events in the progression from an in situ to an invasive breast carcinoma

• Type: Article in International Scientific Journal
• Date: 2013

Authors

Martins, D (Author) Other; Beca, FF (Author) Other; Sousa, B (Author) Other; Baltazar, F (Author) Other; Joana Paredes (Author) FMUP; Fernando Schmitt (Author) FMUP

Journal

Title: Cell Cycle

Vol. 12

Pages: 2684-2690

ISSN: 1538-4101

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 41 Citations

Scopus - 39 Citations

Other information

Authenticus ID: P-008-DGN

DOI: 10.4161/cc.25794

Abstract (EN): The progression from in situ to invasive breast carcinoma is still an event poorly understood. However, it has been suggested that interactions between the neoplastic cells and the tumor microenvironment may play an important role in this process. Thus, the determination of differential tumor-stromal metabolic interactions could be an important step in invasiveness. The expression of stromal Caveolin-1 (Cav-1) has already been implicated in the progression from ductal carcinoma in situ (DCIS) to invasive ductal carcinoma (IDC). Additionally, stromal Cav-1 expression has been associated with the expression of stromal monocarboxylate transporter 4 (MCT4) in invasive breast cancer. However, the role of stromal MCT4 in invasiveness has never been explored, neither the association between Cav-1 and MCT4 in the transition from breast DCIS to IDC. Therefore, our aim was to investigate in a series of breast cancer samples including matched in situ and invasive components, if there was a relationship between stromal Cav-1 and MCT4 in the progression from in situ to invasive carcinoma. We found loss of stromal Cav-1 in the progression to IDC in 75% of the cases. In contrast, MCT4 stromal expression was acquired in 87% of the IDCs. Interestingly, a concomitant loss of Cav-1 and gain of MCT4 was observed in the stroma of 75% of the cases, when matched in situ and invasive carcinomas were compared. These results suggest that alterations in Cav-1 and MCT4 may thus mark a critical point in the progression from in situ to invasive breast cancer.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7