Transmembrane
signaling
receptors,
such
as
integrins,
organize
nanoclusters
that
provide
several
advantages,
including
increasing
avidity,
sensitivity
(increasing
the
signal-to-noise
ratio),
and
robustness
(signaling
threshold)
of
signal
in
contrast
to
by
single
receptors.
Furthermore,
compared
large
micron-sized
clusters,
offer
advantage
rapid
turnover
for
disassembly
signal.
However,
whether
function
hubs
remains
poorly
understood.
Here,
we
employ
fluorescence
nanoscopy
combined
with
photoactivation
photobleaching
at
subdiffraction
limited
resolution
∼100
nm
length
scale
within
a
focal
adhesion
examine
dynamics
diverse
proteins.
We
show
(i)
subregions
adhesions
are
enriched
an
immobile
population
integrin
β3
organized
nanoclusters,
which
(ii)
turn
serve
associated
key
adhesome
proteins-vinculin,
kinase
(FAK)
paxillin,
demonstrating
proceeds
formation
rather
than
through
individual
(iii)
Distinct
protein
exhibit
distinct
dynamics,
is
closely
correlated
their
signaling.
(iv)
Long-lived
hubs─wherein
phosphorylated
FAK
form
stable
close
proximity
them,
disassembled
response
inactivation
removal
force
activation
phosphatase
PTPN12.
(v)
Signaling
takes
place
external
signals
or
geometric
arrangement
when
removed,
these
disassemble.
term
functional
transit
relay
nodes
(STARnodes).
Taken
together,
results
demonstrate
STARnodes
seed
downstream
receptors
organizing
proteins
(FAK,
vinculin)
incoming
intracellularly
bring
about
robust
function.
Signal Transduction and Targeted Therapy,
Год журнала:
2023,
Номер
8(1)
Опубликована: Янв. 2, 2023
Abstract
Integrins
are
considered
the
main
cell-adhesion
transmembrane
receptors
that
play
multifaceted
roles
as
extracellular
matrix
(ECM)-cytoskeletal
linkers
and
transducers
in
biochemical
mechanical
signals
between
cells
their
environment
a
wide
range
of
states
health
diseases.
Integrin
functions
dependable
on
delicate
balance
active
inactive
status
via
multiple
mechanisms,
including
protein-protein
interactions,
conformational
changes,
trafficking.
Due
to
exposure
cell
surface
sensitivity
molecular
blockade,
integrins
have
been
investigated
pharmacological
targets
for
nearly
40
years,
but
given
complexity
sometimes
opposite
characteristics,
targeting
integrin
therapeutics
has
challenge.
To
date,
only
seven
drugs
successfully
marketed,
abciximab,
eptifibatide,
tirofiban,
natalizumab,
vedolizumab,
lifitegrast,
carotegrast.
Currently,
there
approximately
90
kinds
integrin-based
therapeutic
or
imaging
agents
clinical
studies,
small
molecules,
antibodies,
synthetic
mimic
peptides,
antibody–drug
conjugates
(ADCs),
chimeric
antigen
receptor
(CAR)
T-cell
therapy,
agents,
etc.
A
serious
lesson
from
past
drug
discovery
research
efforts
is
successes
rely
both
deep
understanding
integrin-regulatory
mechanisms
unmet
needs.
Herein,
we
provide
systematic
complete
review
all
family
members
integrin-mediated
downstream
signal
transduction
highlight
ongoing
develop
new
therapies/diagnoses
bench
clinic.
In
addition,
further
discuss
trend
development,
how
improve
success
rate
trials
therapies,
key
points
research,
basic
translational
research.
Nature Immunology,
Год журнала:
2023,
Номер
24(7), С. 1173 - 1187
Опубликована: Июнь 8, 2023
Abstract
Blood
protein
extravasation
through
a
disrupted
blood–brain
barrier
and
innate
immune
activation
are
hallmarks
of
neurological
diseases
emerging
therapeutic
targets.
However,
how
blood
proteins
polarize
cells
remains
largely
unknown.
Here,
we
established
an
unbiased
blood-innate
immunity
multiomic
genetic
loss-of-function
pipeline
to
define
the
transcriptome
global
phosphoproteome
blood-induced
polarization
its
role
in
microglia
neurotoxicity.
induced
widespread
microglial
transcriptional
changes,
including
changes
involving
oxidative
stress
neurodegenerative
genes.
Comparative
functional
multiomics
showed
that
induce
distinct
receptor-mediated
programs
macrophages,
such
as
redox,
type
I
interferon
lymphocyte
recruitment.
Deletion
coagulation
factor
fibrinogen
reversed
signatures.
Genetic
elimination
fibrinogen-binding
motif
CD11b
Alzheimer’s
disease
mice
reduced
lipid
metabolism
signatures
were
shared
with
autoimmune-driven
neuroinflammation
multiple
sclerosis
mice.
Our
data
provide
interactive
resource
for
investigation
immunology
could
support
targeting
by
vascular
signals.
Cell,
Год журнала:
2024,
Номер
187(12), С. 2990 - 3005.e17
Опубликована: Май 20, 2024
Integrins
link
the
extracellular
environment
to
actin
cytoskeleton
in
cell
migration
and
adhesiveness.
Rapid
coordination
between
events
outside
inside
is
essential.
Single-molecule
fluorescence
dynamics
show
that
ligand
binding
bent-closed
integrin
conformation,
which
predominates
on
surfaces,
followed
within
milliseconds
by
two
concerted
changes,
leg
extension
headpiece
opening,
give
high-affinity
conformation.
The
extended-closed
conformation
not
an
intermediate
but
can
be
directly
accessed
from
extended-open
provides
a
pathway
for
dissociation.
In
contrast
ligand,
talin,
links
β-subunit
cytoplasmic
domain
cytoskeleton,
modestly
stabilizes
does
induce
or
opening.
Integrin
activation
thus
initiated
outside-in
signaling
inside-out
signaling.
Our
results
further
imply
talin
insufficient
tensile
force
transmission
through
ligand-integrin-talin-actin
complex
required.
Giant,
Год журнала:
2024,
Номер
19, С. 100323 - 100323
Опубликована: Июль 10, 2024
Inspired
by
the
extracellular
matrix
(ECM),
biomaterials
have
emerged
as
promising
strategies
in
biomedical
research
and
engineering
domain,
offering
unique
characteristics
for
tissue
regeneration,
drug
delivery,
therapeutic
interventions,
cellular
investigations.
The
ECM,
a
dynamic
network
structure
secreted
various
cells,
primarily
comprises
diverse
proteins
capable
of
facilitating
tissue-ECM
signaling
regulatory
functions
through
its
rich
array
bioactive
substances
multi-level
structural
properties.
Drawing
inspiration
from
intricate
biochemical
composition
natural
researchers
developed
to
encapsulate
these
features
create
biomimetic
microenvironments,
such
electrospinning,
hydrogels/hydrogel
microspheres,
decellularized
ECM(dECM),
ECM-mimicking
peptides.
Furthermore,
mimicking
ECM
components,
ECM-inspired
exhibit
varying
degrees
functionalization,
including
providing
support,
cell
adhesion,
signal
transduction,
mitigating
immune
responses,
remodeling.
In
summary,
advancements
offer
significant
promise
addressing
key
challenges
fields
engineering,
regenerative
medicine,
delivery.
The Journal of Cell Biology,
Год журнала:
2025,
Номер
224(3)
Опубликована: Янв. 3, 2025
Many
cancer
cells
exhibit
increased
amounts
of
paucimannose
glycans,
which
are
truncated
N-glycan
structures
rarely
found
in
mammals.
Paucimannosidic
proteins
proposedly
generated
within
lysosomes
and
exposed
on
the
cell
surface
through
a
yet
uncertain
mechanism.
In
this
study,
we
revealed
that
paucimannosidic
produced
by
lysosomal
glycosidases
secreted
via
exocytosis.
Interestingly,
exocytosis
preferentially
occurred
vicinity
focal
adhesions,
protein
complexes
connecting
actin
cytoskeleton
to
extracellular
matrix.
Through
genome-wide
knockout
screening,
identified
MYO18B,
an
crosslinker,
is
required
for
adhesion
maturation,
facilitating
release
milieu.
Moreover,
mechanosensitive
cation
channel
PIEZO1
locally
activated
at
adhesions
imports
Ca2+
necessary
lysosome-plasma
membrane
fusion.
Collectively,
our
study
unveiled
intimate
relationship
between
adhesion,
shedding
light
unexpected
interplay
activities
cellular
mechanosensing.
Signal Transduction and Targeted Therapy,
Год журнала:
2025,
Номер
10(1)
Опубликована: Март 7, 2025
Redox
signaling
acts
as
a
critical
mediator
in
the
dynamic
interactions
between
organisms
and
their
external
environment,
profoundly
influencing
both
onset
progression
of
various
diseases.
Under
physiological
conditions,
oxidative
free
radicals
generated
by
mitochondrial
respiratory
chain,
endoplasmic
reticulum,
NADPH
oxidases
can
be
effectively
neutralized
NRF2-mediated
antioxidant
responses.
These
responses
elevate
synthesis
superoxide
dismutase
(SOD),
catalase,
well
key
molecules
like
nicotinamide
adenine
dinucleotide
phosphate
(NADPH)
glutathione
(GSH),
thereby
maintaining
cellular
redox
homeostasis.
Disruption
this
finely
tuned
equilibrium
is
closely
linked
to
pathogenesis
wide
range
Recent
advances
have
broadened
our
understanding
molecular
mechanisms
underpinning
dysregulation,
highlighting
pivotal
roles
genomic
instability,
epigenetic
modifications,
protein
degradation,
metabolic
reprogramming.
findings
provide
foundation
for
exploring
regulation
mechanistic
basis
improving
therapeutic
strategies.
While
antioxidant-based
therapies
shown
early
promise
conditions
where
stress
plays
primary
pathological
role,
efficacy
diseases
characterized
complex,
multifactorial
etiologies
remains
controversial.
A
deeper,
context-specific
signaling,
particularly
redox-sensitive
proteins,
designing
targeted
aimed
at
re-establishing
balance.
Emerging
small
molecule
inhibitors
that
target
specific
cysteine
residues
proteins
demonstrated
promising
preclinical
outcomes,
setting
stage
forthcoming
clinical
trials.
In
review,
we
summarize
current
intricate
relationship
disease
also
discuss
how
these
insights
leveraged
optimize
strategies
practice.