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2015 ; 5
(ä): 12879
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Novel microscopy-based screening method reveals regulators of contact-dependent
intercellular transfer
#MMPMID26271723
Frei DM
; Hodneland E
; Rios-Mondragon I
; Burtey A
; Neumann B
; Bulkescher J
; Schölermann J
; Pepperkok R
; Gerdes HH
; Kögel T
Sci Rep
2015[Aug]; 5
(ä): 12879
PMID26271723
show ga
Contact-dependent intercellular transfer (codeIT) of cellular constituents can
have functional consequences for recipient cells, such as enhanced survival and
drug resistance. Pathogenic viruses, prions and bacteria can also utilize this
mechanism to spread to adjacent cells and potentially evade immune detection.
However, little is known about the molecular mechanism underlying this
intercellular transfer process. Here, we present a novel microscopy-based
screening method to identify regulators and cargo of codeIT. Single donor cells,
carrying fluorescently labelled endocytic organelles or proteins, are co-cultured
with excess acceptor cells. CodeIT is quantified by confocal microscopy and image
analysis in 3D, preserving spatial information. An siRNA-based screening using
this method revealed the involvement of several myosins and small GTPases as
codeIT regulators. Our data indicates that cellular protrusions and tubular
recycling endosomes are important for codeIT. We automated image acquisition and
analysis to facilitate large-scale chemical and genetic screening efforts to
identify key regulators of codeIT.