| Identification of ubiquitin in bovine milk and its growth inhibitory effects on human cancer cell lines. | |
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MedLine Citation:
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PMID: 20655412 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Bovine milk is associated with improved health and reduced risk of several diseases, among them cancer. Milk is a complex mixture of known and unknown components. The components and the mechanisms that contribute to the cancer-preventive effects are largely unknown. We set out to find new peptides in milk and identified ubiquitin (Ub) using matrix-assisted laser desorption ionization-time of flight mass spectrometry and Western blot. Using quantitative Western blot, we estimated the Ub concentration to be about 0.003 micromol/L in milk. We then decided to investigate the effect of treating human colon cancer CaCo-2 cells with Ub, using higher concentrations than in milk. CaCo-2 cells treated with 0.02 to 2.0 micromol/L Ub showed significantly decreased proliferation compared with untreated control cells. A higher growth inhibitory effect than in CaCo-2 cells was found in the neuroblastoma cell line SH-SY5Y treated with 0.02 to 0.2 micromol/L Ub. A bromodeoxyuridine DNA flow cytometric method was used to study cell cycle kinetics in Ub-treated CaCo-2 cells. The data point toward a prolongation of the G(1) phase. The levels of several cell cycle regulatory proteins were affected. Our data point to Ub possibly being one of the components in milk reducing the risk of cancer. |
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Authors:
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C Freiburghaus; C Welinder; U Tjörnstad; H Lindmark-Månsson; M Paulsson; S Oredsson |
Publication Detail:
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Type: Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of dairy science Volume: 93 ISSN: 1525-3198 ISO Abbreviation: J. Dairy Sci. Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-07-26 Completed Date: 2010-11-10 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 2985126R Medline TA: J Dairy Sci Country: United States |
Other Details:
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Languages: eng Pagination: 3442-52 Citation Subset: IM |
Copyright Information:
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Copyright (c) 2010 American Dairy Science Association. Published by Elsevier Inc. All rights reserved. |
Affiliation:
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Department of Food Technology, Engineering and Nutrition, Lund University, PO Box 124, 22100 Lund, Sweden. catja.freiburghaus@food.lth.se |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Caco-2 Cells Cattle Cell Cycle / drug effects Cell Line, Tumor Cell Proliferation / drug effects Growth Inhibitors / analysis, pharmacology* Humans Milk / chemistry* Ubiquitin / analysis, pharmacology* |
| Chemical | |
Reg. No./Substance:
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0/Growth Inhibitors; 0/Ubiquitin |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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