Document Detail

Effects of omega-3 and omega-6 fatty acids on IGF-I receptor signalling in colorectal cancer cells.
MedLine Citation:
PMID:  19480565     Owner:  NLM     Status:  MEDLINE    
The insulin-like growth factor (IGF) system plays a critical role in normal growth and development as well as in malignant states. Most of the biological activities of the IGFs are mediated by the IGF-IR, which is over-expressed in most tumours and cancer cell lines. Fatty acids have critical roles in both systemic physiological processes (e.g. metabolism) and cellular events (e.g. proliferation, apoptosis, signal transduction, and gene expression). Alpha-linolenic acid (ALA) and linoleic acid (LA) are essential fatty acids of the omega-3 and omega-6 families, respectively. The aim of this study was to investigate the potential interactions between fatty acids and the IGF signal transduction pathways, and to evaluate the impact of this interplay on colon cancer cells survival and proliferation. Results of Western blot analyses revealed that ALA and LA enhanced the ligand-induced IGF-IR phosphorylation and, in addition, increased receptor phosphorylation in an IGF-I independent manner. Furthermore, fatty acid treatment led to phosphorylation of downstream signalling molecules, including Akt and Erk. In addition, FACS analysis and apoptosis measurements indicated that ALA and LA have a potential mitogenic effect on HCT116 cells, as reflected by the number of cells in S phase and by a reduction of PARP cleavage, implying a reduction in apoptotic activity. In summary, our results provide evidence that omega-3 and omega-6 fatty acids modulate IGF-I action in colon cancer cells.
Hila Seti; Alicia Leikin-Frenkel; Haim Werner
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Archives of physiology and biochemistry     Volume:  115     ISSN:  1744-4160     ISO Abbreviation:  Arch. Physiol. Biochem.     Publication Date:  2009 Jul 
Date Detail:
Created Date:  2009-07-29     Completed Date:  2010-01-05     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9510153     Medline TA:  Arch Physiol Biochem     Country:  England    
Other Details:
Languages:  eng     Pagination:  127-36     Citation Subset:  IM    
Department of Human Molecular Genetics and Biochemistry, Sackler School of Medicine, Tel Aviv University, Tel Aviv 69978, Israel.
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MeSH Terms
Colorectal Neoplasms / genetics*
Fatty Acids, Omega-3 / genetics*
Fatty Acids, Omega-6 / genetics*
HCT116 Cells
Receptor, IGF Type 1 / metabolism*
Signal Transduction / physiology*
Reg. No./Substance:
0/Fatty Acids, Omega-3; 0/Fatty Acids, Omega-6; EC, IGF Type 1

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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