International Journal of Molecular Sciences,
Journal Year:
2023,
Volume and Issue:
24(15), P. 12528 - 12528
Published: Aug. 7, 2023
Brain
organoids
are
three-dimensional
(3D)
structures
derived
from
human
pluripotent
stem
cells
(hPSCs)
that
reflect
early
brain
organization.
These
contain
different
cell
types,
including
neurons
and
glia,
similar
to
those
found
in
the
brain.
Human
provide
unique
opportunities
model
features
of
development
not
well-reflected
animal
models.
Compared
with
traditional
cultures
models,
offer
a
more
accurate
representation
function,
rendering
them
suitable
models
for
neurodevelopmental
diseases.
In
particular,
patients’
have
enabled
researchers
study
diseases
at
stages
gain
better
understanding
disease
mechanisms.
Multi-brain
regional
assembloids
allow
investigation
interactions
between
distinct
regions
while
achieving
higher
level
consistency
molecular
functional
characterization.
Although
possess
promising
features,
their
usefulness
is
limited
by
several
unresolved
constraints,
cellular
stress,
hypoxia,
necrosis,
lack
high-fidelity
maturation,
circuit
formation.
this
review,
we
discuss
studies
overcome
natural
limitations
organoids,
emphasizing
importance
combinations
all
neural
such
as
glia
(astrocyte,
oligodendrocytes,
microglia)
vascular
cells.
Additionally,
considering
similarity
developing
brain,
regionally
patterned
organoid-derived
(NSCs)
could
serve
scalable
source
replacement
therapy.
We
highlight
potential
application
therapy
within
field.
Nature,
Journal Year:
2023,
Volume and Issue:
620(7976), P. 1001 - 1006
Published: Aug. 30, 2023
Abstract
Bio-integrated
devices
need
power
sources
to
operate
1,2
.
Despite
widely
used
technologies
that
can
provide
large-scale
targets,
such
as
wired
energy
supplies
from
batteries
or
wireless
transduction
3
,
a
efficiently
stimulate
cells
and
tissues
on
the
microscale
is
still
pressing.
The
ideal
miniaturized
source
should
be
biocompatible,
mechanically
flexible
able
generate
an
ionic
current
for
biological
stimulation,
instead
of
using
electron
flow
in
conventional
electronic
4–6
One
approach
use
soft
inspired
by
electrical
eel
7,8
;
however,
combine
required
capabilities
have
not
yet
been
produced,
because
it
challenging
obtain
units
both
conserve
contained
before
usage
are
easily
triggered
produce
output.
Here
we
develop
depositing
lipid-supported
networks
nanolitre
hydrogel
droplets
internal
ion
gradients
energy.
Compared
original
eel-inspired
design
7
our
shrink
volume
unit
more
than
10
5
-fold
store
longer
24
h,
enabling
operation
on-demand
with
680-fold
greater
density
about
1,300
W
m
−3
Our
droplet
device
serve
biocompatible
modulate
neuronal
network
activity
three-dimensional
neural
microtissues
ex
vivo
mouse
brain
slices.
Ultimately,
ionotronic
might
integrated
into
living
organisms.
Signal Transduction and Targeted Therapy,
Journal Year:
2024,
Volume and Issue:
9(1)
Published: April 26, 2024
The
induced
pluripotent
stem
cell
(iPSC)
technology
has
transformed
in
vitro
research
and
holds
great
promise
to
advance
regenerative
medicine.
iPSCs
have
the
capacity
for
an
almost
unlimited
expansion,
are
amenable
genetic
engineering,
can
be
differentiated
into
most
somatic
types.
been
widely
applied
model
human
development
diseases,
perform
drug
screening,
develop
therapies.
In
this
review,
we
outline
key
developments
iPSC
field
highlight
immense
versatility
of
modeling
therapeutic
applications.
We
begin
by
discussing
pivotal
discoveries
that
revealed
potential
a
nucleus
reprogramming
led
successful
generation
iPSCs.
consider
molecular
mechanisms
dynamics
as
well
numerous
methods
available
induce
pluripotency.
Subsequently,
discuss
various
iPSC-based
cellular
models,
from
mono-cultures
single
type
complex
three-dimensional
organoids,
how
these
models
elucidate
diseases.
use
examples
neurological
disorders,
coronavirus
disease
2019
(COVID-19),
cancer
diversity
disease-specific
phenotypes
modeled
using
iPSC-derived
cells.
also
used
high-throughput
screening
toxicity
studies.
Finally,
process
developing
autologous
allogeneic
therapies
their
alleviate
International Journal of Molecular Sciences,
Journal Year:
2023,
Volume and Issue:
24(15), P. 12046 - 12046
Published: July 27, 2023
Although
historically,
the
traditional
bidimensional
in
vitro
cell
system
has
been
widely
used
research,
providing
much
fundamental
information
regarding
cellular
functions
and
signaling
pathways
as
well
nuclear
activities,
simplicity
of
this
does
not
fully
reflect
heterogeneity
complexity
vivo
systems.
From
arises
need
to
use
animals
for
experimental
research
testing.
Nevertheless,
animal
experimentation
presents
various
aspects
complexity,
such
ethical
issues,
which
led
Russell
Burch
1959
formulate
3R
(Replacement,
Reduction,
Refinement)
principle,
underlying
urgent
introduce
non-animal-based
methods
research.
Considering
this,
three-dimensional
(3D)
models
emerged
scientific
community
a
bridge
between
models,
allowing
achievement
differentiation
while
avoiding
The
purpose
review
is
provide
general
overview
most
common
establish
3D
culture
discuss
their
promising
applications.
Three-dimensional
cultures
have
employed
study
both
organ
physiology
diseases;
moreover,
they
represent
valuable
tool
studying
many
cancer.
Finally,
possibility
using
drug
screening
regenerative
medicine
paves
way
development
new
therapeutic
opportunities
diseases.
Nature,
Journal Year:
2024,
Volume and Issue:
628(8009), P. 818 - 825
Published: April 24, 2024
Abstract
Timothy
syndrome
(TS)
is
a
severe,
multisystem
disorder
characterized
by
autism,
epilepsy,
long-QT
and
other
neuropsychiatric
conditions
1
.
TS
type
(TS1)
caused
gain-of-function
variant
in
the
alternatively
spliced
developmentally
enriched
CACNA1C
exon
8A,
as
opposed
to
its
counterpart
8.
We
previously
uncovered
several
phenotypes
neurons
derived
from
patients
with
TS1,
including
delayed
channel
inactivation,
prolonged
depolarization-induced
calcium
rise,
impaired
interneuron
migration,
activity-dependent
dendrite
retraction
an
unanticipated
persistent
expression
of
8A
2–6
reasoned
that
switching
utilization
8
would
represent
potential
therapeutic
strategy.
Here
we
developed
antisense
oligonucleotides
(ASOs)
effectively
decrease
inclusion
human
cells
both
vitro
and,
following
transplantation,
vivo.
discovered
ASO-mediated
switch
robustly
rescued
defects
patient-derived
cortical
organoids
migration
forebrain
assembloids.
Leveraging
transplantation
platform
7
,
found
single
intrathecal
ASO
administration
changes
vivo
patient
neurons,
suggesting
suppression
treatment
for
TS1.
Broadly,
these
experiments
illustrate
how
multilevel,
stem
cell
model-based
approach
can
identify
strategies
reverse
disease-relevant
neural
pathophysiology.