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2017 ; 7
(ä): 45305
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Extracellular matrix protein Reelin promotes myeloma progression by facilitating
tumor cell proliferation and glycolysis
#MMPMID28345605
Qin X
; Lin L
; Cao L
; Zhang X
; Song X
; Hao J
; Zhang Y
; Wei R
; Huang X
; Lu J
; Ge Q
Sci Rep
2017[Mar]; 7
(ä): 45305
PMID28345605
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Reelin is an extracellular matrix protein that is crucial for neuron migration,
adhesion, and positioning. We examined the expression of Reelin in a large cohort
of multiple myeloma patients recorded in Gene Expression Omnibus (GEO) database
and used over-expression and siRNA knockdown of Reelin to investigate the role of
Reelin in myeloma cell growth. We find that Reelin expression is negatively
associated with myeloma prognosis. Reelin promotes myeloma cell proliferation in
vitro as well as in vivo. The Warburg effect, evidenced by increased glucose
uptake and lactate production, is also enhanced in Reelin-expressing cells. The
activation of FAK/Syk/Akt/mTOR and STAT3 pathways contributes to Reelin-induced
cancer cell growth and metabolic reprogramming. Our findings further reveal that
activated Akt and STAT3 pathways induce the upregulation of HIF1? and its
downstream targets (LDHA and PDK1), leading to increased glycolysis in myeloma
cells. Together, our results demonstrate the critical contributions of Reelin to
myeloma growth and metabolism. It presents an opportunity for myeloma therapeutic
intervention by inhibiting Reelin and its signaling pathways.