Suillus collinitus methanolic extract increases p53 expression and causes cell cycle arrest and apoptosis in a breast cancer cell line

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Josiana A Vaz (Author) Other; Isabel C F R Ferreira (Author) Other; Catarina Tavares (Author) Other; Gabriela M Almeida (Author) Other; Anabela Martins (Author) Other; Helena Vasconcelos, MH (Author) FFUP

Journal

Title: Food Chemistry

Vol. 135 No. 3

Pages: 596-602

ISSN: 0308-8146

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 25 Citations

Scopus - 28 Citations

Scientific classification

FOS: Agrarian Sciences > Other Agrarian Sciences

Other information

Authenticus ID: P-002-3E8

DOI: 10.1016/j.foodchem.2012.04.127

Abstract (EN): In the present work, methanolic, ethanolic and boiled water extracts of Suillus collinitus were chemically characterised and submitted to an evaluation of their bioactive properties (antioxidant potential and cytotoxic activity in tumor cell lines). Phenolic acids and sugars were identified chromatographically and quantified in the methanolic and boiled water extracts, respectively. S. collinitus ethanolic extract had the highest antioxidant activity. Nevertheless, with respect to cell growth inhibition, the methanolic extract was the most potent extract, particularly in MCF-7 cells (GI(50) 25.2 +/- 0.2 mu g/ml). Moreover, the GI(50) concentration of this extract induced a G1 cell cycle arrest, with a concomitant decrease in the percentage of cells in the S phase. Furthermore, it caused an increase in the percentage of apoptotic cells, from 6.0 +/- 0.2% in untreated cells, to 15.3 +/- 2.0% in cells treated with the GI(50) concentration and to 16.3 +/- 2.0% in cells treated with 2 x GI(50) concentration. In addition, 48 h treatment with the GI(50) concentration caused a strong increase in the levels of p53, p21, and cleaved PARP, together with a decrease in Bcl-2 and XIAP. Results indicate that S. collinitus may be a promising source of bioactive compounds. Particularly, its methanolic extract appears to have a p53-mediated effect on the normal cell cycle distribution and apoptosis induction in a human breast tumor cell line.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7