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Identification of ubiquitin in bovine milk and its growth inhibitory effects on human cancer cell lines.

Freiburghaus, Catja; Welinder, Charlotte LU ; Tjörnstad, U; Lindmark Månsson, Helena; Paulsson, Marie and Oredsson, S (2010) In Journal of Dairy Science 93(8). p.3442-3452
Abstract
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... (More)
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. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Dairy Science
volume
93
issue
8
pages
3442 - 3452
publisher
American Dairy Science Association
external identifiers
  • wos:000280203400008
  • pmid:20655412
  • scopus:77955035863
ISSN
1525-3198
DOI
10.3168/jds.2009-2878
language
English
LU publication?
yes
id
c341159d-0990-4873-9cf8-e11edeac0c2b (old id 1644590)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/20655412?dopt=Abstract
date added to LUP
2010-08-05 10:34:08
date last changed
2018-05-29 12:31:51
@article{c341159d-0990-4873-9cf8-e11edeac0c2b,
  abstract     = {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.},
  author       = {Freiburghaus, Catja and Welinder, Charlotte and Tjörnstad, U and Lindmark Månsson, Helena and Paulsson, Marie and Oredsson, S},
  issn         = {1525-3198},
  language     = {eng},
  number       = {8},
  pages        = {3442--3452},
  publisher    = {American Dairy Science Association},
  series       = {Journal of Dairy Science},
  title        = {Identification of ubiquitin in bovine milk and its growth inhibitory effects on human cancer cell lines.},
  url          = {http://dx.doi.org/10.3168/jds.2009-2878},
  volume       = {93},
  year         = {2010},
}