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Updated: Jun 25, 2026

Static Adhesion Assay for the Study of Integrin Activation in T Lymphocytes
Published on: June 13, 2014
Integrin-linked kinase is involved in lactoferrin-induced anchorage-independent cell growth and survival in PC12
Toshiaki Ishii1, Tomoka Uto, Kaori Mori
1Department of Basic Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido 080-8555, Japan. ishii@obihiro.ac.jp
Aims:
Bovine lactoferrin (bLf) causes anchorage-independent cell growth in PC12 cells. The present study investigated the mechanisms involved in bLf-induced anchorage-independent cell growth and survival in PC12 cells.
Main Methods:
The number of adherent cells and suspended cells was estimated separately by using a methyl thiazol tetrazolium (MTT) assay, and the sum of both optical density (O.D.) (570 nm) values was used as a measure of the total number of cells.
Key Findings:
Integrin-linked kinase (ILK) plays an important role in integrin and growth factor signaling pathways. Stable transfection of PC12 cells with a dominant negative kinase-deficient mutant of ILK (DN-ILK) inhibited bLf-induced anchorage-independent cell growth. The ILK activity in the parental cells was transiently activated after addition of bLf, whereas bLf-induced activation of ILK was blocked in DN-ILK-transfected cells. bLf also activated p38 mitogen-activated protein kinase (MAPK); however, the p38 MAPK activation was inhibited by stable DN-ILK transfection. Moreover, cell viability in the suspended cells by bLf strongly decreased after treatment with SB203580, an inhibitor of p38 MAPK.
Significance:
These results suggest that ILK is involved in bLf-induced anchorage-independent cell growth and viability via activation of p38 MAPK.
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