Frontiers in Immunology,
Journal Year:
2023,
Volume and Issue:
14
Published: June 26, 2023
Background
A
growing
body
of
evidence
suggests
that
particulate
matter
(PM10)
enters
the
gastrointestinal
(GI)
tract
directly,
causing
GI
epithelial
cells
to
function
less
efficiently,
leading
inflammation
and
an
imbalance
in
gut
microbiome.
PM10
may,
however,
act
as
exacerbation
factor
patients
with
inflamed
intestinal
epithelium,
which
is
associated
inflammatory
bowel
disease.
Objective
The
purpose
this
study
was
dissect
pathology
mechanism
exposure
intestines.
Methods
In
study,
we
established
chronically
epithelium
models
utilizing
two-dimensional
(2D)
human
(hIECs)
3D
organoids
(hIOs),
mimic
vivo
cellular
diversity
function,
order
examine
deleterious
effects
intestine-like
vitro
models.
Results
Inflamed
2D
hIECs
hIOs
exhibited
pathological
features,
such
inflammation,
decreased
markers,
defective
barrier
function.
addition,
found
induced
a
more
severe
disturbance
peptide
uptake
than
control
cells.
This
due
fact
it
interferes
calcium
signaling,
protein
digestion,
absorption
pathways.
findings
demonstrate
PM10-induced
alterations
contribute
disorders
caused
by
intestine.
Conclusions
According
our
findings,
hIEC
hIO
could
be
powerful
platforms
for
evaluation
causal
relationship
between
PM
abnormal
functions.
bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2023,
Volume and Issue:
unknown
Published: May 23, 2023
Summary
Formation
of
fluid
filled
lumen
by
epithelial
tissues
is
a
fundamental
process
for
organ
development.
How
cells
regulate
the
hydraulic
and
cortical
forces
to
control
morphology
not
completely
understood.
Here,
we
quantified
mechanical
role
tight
junctions
in
formation
using
genetically
modified
MDCKII
cysts.
We
found
that
paracellular
ion
barrier
formed
claudin
receptors
required
inflation
lumen.
However,
depletion
zonula
occludens
scaffold
resulted
collapse
folding
apical
membranes.
Combining
quantitative
measurements
perturbations
hydrostatic
pressure
junctional
tension
with
modelling,
were
able
predict
morphologies
from
pressure-tension
force
balance.
MDCK
tissue
junction
promotes
spherical
decreasing
via
inhibition
myosin.
In
addition,
surface
area
largely
uncoupled
volume
changes,
suggesting
excess
contributes
opening
low-pressure
regime.
Overall,
our
findings
provide
understanding
how
use
modulate
shape.
Journal of Cell Science,
Journal Year:
2023,
Volume and Issue:
136(15)
Published: July 18, 2023
Epithelial
barrier
function
is
commonly
analyzed
using
transepithelial
electrical
resistance,
which
measures
ion
flux
across
a
monolayer,
or
by
adding
traceable
macromolecules
and
monitoring
their
passage
the
monolayer.
Although
these
methods
measure
changes
in
global
function,
they
lack
sensitivity
needed
to
detect
local
transient
breaches,
do
not
reveal
location
of
leaks.
Therefore,
we
previously
developed
method
that
named
zinc-based
ultrasensitive
microscopic
assay
(ZnUMBA),
overcomes
limitations,
allowing
for
detection
tight
junction
leaks
with
high
spatiotemporal
resolution.
Here,
present
expanded
applications
ZnUMBA.
ZnUMBA
can
be
used
Xenopus
embryos
dynamics
restoration
actin
accumulation
following
laser
injury.
also
effectively
utilized
developing
zebrafish
as
well
cultured
monolayers
Madin-Darby
canine
kidney
(MDCK)
II
epithelial
cells.
powerful
flexible
that,
minimal
optimization,
applied
multiple
systems
dynamic
precision.
Frontiers in Immunology,
Journal Year:
2023,
Volume and Issue:
14
Published: June 26, 2023
Background
A
growing
body
of
evidence
suggests
that
particulate
matter
(PM10)
enters
the
gastrointestinal
(GI)
tract
directly,
causing
GI
epithelial
cells
to
function
less
efficiently,
leading
inflammation
and
an
imbalance
in
gut
microbiome.
PM10
may,
however,
act
as
exacerbation
factor
patients
with
inflamed
intestinal
epithelium,
which
is
associated
inflammatory
bowel
disease.
Objective
The
purpose
this
study
was
dissect
pathology
mechanism
exposure
intestines.
Methods
In
study,
we
established
chronically
epithelium
models
utilizing
two-dimensional
(2D)
human
(hIECs)
3D
organoids
(hIOs),
mimic
vivo
cellular
diversity
function,
order
examine
deleterious
effects
intestine-like
vitro
models.
Results
Inflamed
2D
hIECs
hIOs
exhibited
pathological
features,
such
inflammation,
decreased
markers,
defective
barrier
function.
addition,
found
induced
a
more
severe
disturbance
peptide
uptake
than
control
cells.
This
due
fact
it
interferes
calcium
signaling,
protein
digestion,
absorption
pathways.
findings
demonstrate
PM10-induced
alterations
contribute
disorders
caused
by
intestine.
Conclusions
According
our
findings,
hIEC
hIO
could
be
powerful
platforms
for
evaluation
causal
relationship
between
PM
abnormal
functions.