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2015 ; 15
(ä): 102
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The choroid plexus may be an underestimated site of tumor invasion to the brain:
an in vitro study using neuroblastoma cell lines
#MMPMID26500454
Vandenhaute E
; Stump-Guthier C
; Lasierra Losada M
; Tenenbaum T
; Rudolph H
; Ishikawa H
; Schwerk C
; Schroten H
; Dürken M
; März M
; Karremann M
Cancer Cell Int
2015[]; 15
(ä): 102
PMID26500454
show ga
BACKGROUND: The central nervous system (CNS) is protected by several barriers,
including the blood-brain (BBB) and blood-cerebrospinal fluid (BCSFB) barriers.
Understanding how cancer cells circumvent these protective barriers to invade the
CNS is of crucial interest, since brain metastasis during cancer is often a fatal
event in both children and adults. However, whereas much effort has been invested
in elucidating the process of tumor cell transmigration across the BBB, the role
of the BCSFB might still be underestimated considering the significant number of
meningeal cancer involvement. Our work aimed to investigate the transmigration of
neuroblastoma cells across the BCSFB in vitro. METHODS: We used an inverted model
of the human BCSFB presenting proper restrictive features including adequate
expression of tight-junction proteins, low permeability to integrity markers, and
high trans-epithelial electrical resistance. Two different human neuroblastoma
cell lines (SH-SY5Y and IMR-32) were used to study the transmigration process by
fluorescent microscopy analysis. RESULTS: The results show that neuroblastoma
cells are able to actively cross the tight human in vitro BCSFB model within
24 h. The presence and transmigration of neuroblastoma cancer cells did not
affect the barrier integrity within the duration of the experiment. CONCLUSIONS:
In conclusion, we presume that the choroid plexus might be an underestimated site
of CNS invasion, since neuroblastoma cell lines are able to actively cross a
choroid plexus epithelial cell layer. Further studies are warranted to elucidate
the molecular mechanisms of tumor cell transmigration in vitro and in vivo.