Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review
Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review
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TY - JOUR
T1 - Preparation and comparison of cytotoxic complexes formed between oleic acid and either bovine or human α-lactalbumin
AU - Brinkmann, C R
AU - Thiel, S
AU - Larsen, M K
AU - Petersen, T E
AU - Jensenius, Jens Christian
AU - Heegaard, C W
N1 - Copyright © 2011 American Dairy Science Association. Published by Elsevier Inc. All rights reserved.
PY - 2011
Y1 - 2011
N2 - α-Lactalbumin is a ubiquitous calcium-binding milk protein with a well-characterized function in regulating the synthesis of lactose. An entirely different activity has been shown to occur when a complex is formed between calcium-free α-lactalbumin and oleic acid. This complex shows strong cytotoxic action against several cancer cells, and several mechanisms have been suggested to account for this cell-killing activity. Most studies have been performed using the human protein, but bovine α-lactalbumin shows similar activity. A new and simple 2-step method for purification of calcium-free α-lactalbumin has been developed, and the resulting highly purified preparation was used to generate a complex with oleic acid. Using 3 different cell lines and 2 types of cell viability assays, the bovine and human α-lactalbumin showed comparable cytotoxic activity. The effect was apparent after 15 min of incubation and was inhibited by the presence of fetal bovine serum or bovine serum albumin. The bovine protein might be a useful alternative to the human protein, but also raises the question whether cytotoxic activity could be generated in different kinds of food containing α-lactalbumin.
AB - α-Lactalbumin is a ubiquitous calcium-binding milk protein with a well-characterized function in regulating the synthesis of lactose. An entirely different activity has been shown to occur when a complex is formed between calcium-free α-lactalbumin and oleic acid. This complex shows strong cytotoxic action against several cancer cells, and several mechanisms have been suggested to account for this cell-killing activity. Most studies have been performed using the human protein, but bovine α-lactalbumin shows similar activity. A new and simple 2-step method for purification of calcium-free α-lactalbumin has been developed, and the resulting highly purified preparation was used to generate a complex with oleic acid. Using 3 different cell lines and 2 types of cell viability assays, the bovine and human α-lactalbumin showed comparable cytotoxic activity. The effect was apparent after 15 min of incubation and was inhibited by the presence of fetal bovine serum or bovine serum albumin. The bovine protein might be a useful alternative to the human protein, but also raises the question whether cytotoxic activity could be generated in different kinds of food containing α-lactalbumin.
KW - Animals
KW - Cattle
KW - Cell Count
KW - Cell Line, Tumor
KW - Culture Media, Serum-Free
KW - Cytotoxins
KW - HL-60 Cells
KW - Humans
KW - Lactalbumin
KW - Milk
KW - Milk, Human
KW - Oleic Acid
KW - Oleic Acids
KW - Serum
KW - U937 Cells
U2 - 10.3168/jds.2010-3622
DO - 10.3168/jds.2010-3622
M3 - Journal article
C2 - 21524506
VL - 94
SP - 2159
EP - 2170
JO - Indian Journal of Dairy Science
JF - Indian Journal of Dairy Science
SN - 0019-5146
IS - 5
ER -