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2015 ; 15
(ä): 1011
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Natural killer (NK) cells inhibit systemic metastasis of glioblastoma cells and
have therapeutic effects against glioblastomas in the brain
#MMPMID26704632
Lee SJ
; Kang WY
; Yoon Y
; Jin JY
; Song HJ
; Her JH
; Kang SM
; Hwang YK
; Kang KJ
; Joo KM
; Nam DH
BMC Cancer
2015[Dec]; 15
(ä): 1011
PMID26704632
show ga
BACKGROUND: Glioblastoma multiforme (GBM) is characterized by extensive local
invasion, which is in contrast with extremely rare systemic metastasis of GBM.
Molecular mechanisms inhibiting systemic metastasis of GBM would be a novel
therapeutic candidate for GBM in the brain. METHODS: Patient-derived GBM cells
were primarily cultured from surgical samples of GBM patients and were inoculated
into the brains of immune deficient BALB/c-nude or NOD-SCID IL2Rgamma(null) (NSG)
mice. Human NK cells were isolated from peripheral blood mononucleated cells and
expanded in vitro. RESULTS: Patient-derived GBM cells in the brains of NSG mice
unexpectedly induced spontaneous lung metastasis although no metastasis was
detected in BALB/c-nude mice. Based on the difference of the innate immunity
between two mouse strains, NK cell activities of orthotopic GBM xenograft models
based on BALB/c-nude mice were inhibited. NK cell inactivation induced
spontaneous lung metastasis of GBM cells, which indicated that NK cells inhibit
the systemic metastasis. In vitro cytotoxic activities of human NK cells against
GBM cells indicated that cytotoxic activity of NK cells against GBM cells
prevents systemic metastasis of GBM and that NK cells could be effective cell
therapeutics against GBM. Accordingly, NK cells transplanted into orthotopic GBM
xenograft models intravenously or intratumorally induced apoptosis of GBM cells
in the brain and showed significant therapeutic effects. CONCLUSIONS: Our results
suggest that innate NK immunity is responsible for rare systemic metastasis of
GBM and that sufficient supplementation of NK cells could be a promising
immunotherapeutic strategy for GBM in the brain.