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Suppression of CD44 expression decreases migration and invasion of human glioma cells
Author(s) -
Okada Hideho,
Yoshida Jun,
Sokabe Masahiro,
Wakabayashi Takashi,
Hagiwara Masatoshi
Publication year - 1996
Publication title -
international journal of cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.475
H-Index - 234
eISSN - 1097-0215
pISSN - 0020-7136
DOI - 10.1002/(sici)1097-0215(19960410)66:2<255::aid-ijc20>3.0.co;2-a
Subject(s) - glioma , cd44 , biology , cancer research , expression (computer science) , cell , genetics , computer science , programming language
We have reported high expression of CD44H in human glioma cells. To investigate the role of CD44H in the invasion of human glioma, we established a CD44‐anti‐sense‐gene‐expression glioma cell line named U‐251A1. The expression of CD44H in the G‐418‐selected U‐251A1 cells was reduced to 20% of that in the parental U‐251SP cells, as determined by flow‐cytometry analysis. We first examined the migratory responses of U‐251A1 cells in vitro by time‐lapse video‐microscopic sparse cell‐migration assay on hyaluronic acid or on chondroitin 6 sulfate. U‐251A1 cells did not show significant differences in motility on any substrate, while U‐251SP and other CD44H‐positive glioma cells showed dose‐dependent increase of migration specifically on hyaluronic acid. To examine the physiologic function of CD44H in gliomas in vivo , U‐251A1 and its control cells, U‐251S1, which retain CD44‐sense‐expression vector, were injected stereotactically into the brains of nude mice. U‐251A1 cells were localised in the region of the injection site, with relatively well demarcated borders between tumour and brain tissue, while the control cells demonstrated a cell‐infiltration pattern. Our data suggest that CD44H may be required for infiltration of glioma cells through its interaction with hyaluronic acid, a major component of the brain extracellular matrix. © 1996 Wiley‐Liss, Inc.