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2018 ; 37
(30
): 4110-4121
Nephropedia Template TP
gab.com Text
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English Wikipedia
The constitutive activity of the virally encoded chemokine receptor US28
accelerates glioblastoma growth
#MMPMID29706656
Heukers R
; Fan TS
; de Wit RH
; van Senten JR
; De Groof TWM
; Bebelman MP
; Lagerweij T
; Vieira J
; de Munnik SM
; Smits-de Vries L
; van Offenbeek J
; Rahbar A
; van Hoorick D
; Söderberg-Naucler C
; Würdinger T
; Leurs R
; Siderius M
; Vischer HF
; Smit MJ
Oncogene
2018[Jul]; 37
(30
): 4110-4121
PMID29706656
show ga
Glioblastoma (GBM) is the most aggressive and an incurable type of brain cancer.
Human cytomegalovirus (HCMV) DNA and encoded proteins, including the chemokine
receptor US28, have been detected in GBM tumors. US28 displays constitutive
activity and is able to bind several human chemokines, leading to the activation
of various proliferative and inflammatory signaling pathways. Here we show that
HCMV, through the expression of US28, significantly enhanced the growth of 3D
spheroids of U251- and neurospheres of primary glioblastoma cells. Moreover, US28
expression accelerated the growth of glioblastoma cells in an orthotopic
intracranial GBM-model in mice. We developed highly potent and selective
US28-targeting nanobodies, which bind to the extracellular domain of US28 and
detect US28 in GBM tissue. The nanobodies inhibited chemokine binding and reduced
the constitutive US28-mediated signaling with nanomolar potencies and
significantly impaired HCMV/US28-mediated tumor growth in vitro and in vivo. This
study emphasizes the oncomodulatory role of HCMV-encoded US28 and provides a
potential therapeutic approach for HCMV-positive tumors using the nanobody
technology.