Transient
receptor
potential
channel
1
(TRPC1)
is
a
widely
expressed
mechanosensitive
ion
located
within
the
endoplasmic
reticulum
membrane,
crucial
for
refilling
depleted
internal
calcium
stores
during
activation
of
calcium-dependent
signaling
pathways.
Here,
we
demonstrate
that
TRPC1
activity
protective
cartilage
homeostasis
in
prevention
cellular
senescence
associated
breakdown
mechanical
and
inflammatory
challenge.
We
reveal
loss
with
early
stages
osteoarthritis
(OA)
plays
non-redundant
role
chondrocytes.
Trpc1-/-
mice
subjected
to
destabilization
medial
meniscus
induced
OA
developed
more
severe
phenotype
than
wild
type
controls.
During
development,
displayed
an
increased
chondrocyte
survival
rate,
however
remaining
cells
features
including
p16INK4a
expression
decreased
Sox9.
RNA
sequencing
identified
differentially
genes
related
cell
number,
apoptosis
extracellular
matrix
organization.
Trpc1-/-chondrocytes
exhibited
accelerated
dedifferentiation,
while
demonstrating
susceptibility
senescence.
Targeting
mechanism
Trpc1
may
be
promising
therapeutic
strategy
prevention.
Journal of Nanobiotechnology,
Год журнала:
2025,
Номер
23(1)
Опубликована: Янв. 16, 2025
RNA
interference
(RNAi)
and
oxidative
stress
inhibition
therapeutic
strategies
have
been
extensively
utilized
in
the
treatment
of
osteoarthritis
(OA),
most
prevalent
degenerative
joint
disease.
However,
synergistic
effects
these
approaches
on
attenuating
OA
progression
remain
largely
unexplored.
In
this
study,
matrix
metalloproteinase-13
siRNA
(siMMP-13)
was
incorporated
onto
polyethylenimine
(PEI)-polyethylene
glycol
(PEG)
modified
Fe3O4
nanoparticles,
forming
a
nucleic
acid
nanocarrier
termed
si-Fe
NPs.
Subsequently,
poly(vinyl
alcohol)
(PVA)
crosslinked
phenylboronic
(PBA)-modified
hyaluronic
(HA)
hydrogel
(HPP)
used
to
encapsulate
NPs,
resulting
bifunctional
(si-Fe-HPP)
with
reactive
oxygen
species
(ROS)-responsive
RNAi
properties.
Studies
vitro
demonstrated
that
si-Fe-HPP
exhibited
excellent
biocompatibility,
anti-inflammatory
prolonged
stable
retention
time
knee
joint.
Intra-articular
injection
significantly
attenuated
cartilage
degradation
mice
destabilization
medial
meniscus
(DMM)-induced
OA.
The
not
only
notably
alleviated
synovitis,
osteophyte
formation
subchondral
bone
sclerosis,
but
also
markedly
improved
physical
activity
reduced
pain
DMM-induced
mice.
This
study
reveals
si-Fe-HPP,
its
ROS-responsive
abilities,
can
protect
chondrocytes
attenuate
progression,
providing
novel
insights
directions
for
development
materials
treatment.
Advanced Science,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 4, 2025
Abstract
Chondrocyte
senescence
is
an
important
pathogenic
factor
causing
osteoarthritis
(OA)
progression
through
persistently
producing
pro‐inflammatory
factors.
Mesenchymal
stem
cells‐derived
small
extracellular
vesicles
(MSC‐sEVs)
have
shown
anti‐inflammatory
effects
in
OA
models,
while
persistent
existence
of
senescent
chondrocytes
still
promotes
cartilage
destruction.
Therefore,
improving
the
targeted
elimination
ability
on
required
to
facilitate
translation
MSC‐sEVs
treatment.
In
this
study,
versatile
engineered
are
developed
targetedly
clear
and
maintain
metabolic
homeostasis.
Specifically,
loaded
with
siRNA
mouse
double
minute
2
homologue
(siMDM2)
modified
cartilage‐targeting
peptide
WYRGRL‐PEG
2K
‐DSPE
(WPD),
named
WPD‐sEVs
siMDM2
.
The
results
demonstrate
modification
improves
cellular
uptake
chondrocytes,
thus
antiaging
effects.
Importantly,
multifunctional
enhances
penetration
extends
joint
retention
time
MSC‐sEVs.
both
post‐traumatic
mice
naturally
aged
mice,
more
effectively
eliminates
maintained
matrix
By
using
P53
phosphorylation
inhibitor,
essential
role
MDM2‐P53
pathway
function
verified.
ex
vivo
cultured
human
explants,
it
confirmed
that
alleviates
phenotype.
Altogether,
findings
suggest
promising
translational
potential
for
Osteoarthritis
(OA)
is
a
chronic
joint
disease
characterized
by
cartilage
degradation,
inflammation,
and
pain.
While
multiple
factors
contribute
to
OA
development,
age
sex
are
primary
risk
factors,
particularly
affecting
postmenopausal
women.
The
dramatic
increase
in
after
menopause
suggests
estrogen
deficiency
accelerates
progression.
This
review
explores
the
molecular
mechanisms
connecting
aging
focusing
on
key
genes
pathways
identified
through
RNA
sequencing.
Frontiers in Cell and Developmental Biology,
Год журнала:
2025,
Номер
13
Опубликована: Март 19, 2025
Background
Calcification
of
articular
tissues
is
commonly
observed
in
later
osteoarthritis
(OA)
stages
and
can
be
caused
by
basic
calcium
phosphate
(BCP)
or
pyrophosphate
(CPP)
crystals.
Calcification,
particularly
CPP
deposition,
has
recently
been
associated
with
inflammation
cellular
senescence.
Investigating
this
association,
we
analyzed
the
concentration
various
inflammatory
mediators
synovial
fluid
membrane
OA
patients
relation
to
calcification
different
crystal
types.
Methods
Synovial
was
collected
from
during
joint
replacement
surgery.
Cytokine
concentrations
were
measured
using
magnetic
bead-based
multiplex
assay
Luminex®
technology.
Radiographs
used
determine
grade
knee
involved
types
identified
via
Raman
spectroscopy.
Results
radiological
showed
elevated
levels
multiple
cytokines
(IL-10,
IL-15,
IL-1ra,
GM-CSF),
chemokines
(IL-8,
MCP-1,
MIP-1b)
growth
factors
(PDGF-AB/BB,
VEGF).
Crystal
differentiation
revealed
higher
IL-10,
GM-CSF,
PDGF-AB/BB
MIP-1b
CPP-
compared
BCP-calcified
cartilage.
Conclusion
We
show
an
cytokine
profile
that
may
linked
depositison
Nutrients,
Год журнала:
2024,
Номер
16(15), С. 2435 - 2435
Опубликована: Июль 26, 2024
Osteoarthritis
(OA),
characterized
by
chronic
pain
and
joint
degradation,
is
a
progressive
disease
primarily
induced
age-related
systemic
inflammation.
bioRxiv (Cold Spring Harbor Laboratory),
Год журнала:
2024,
Номер
unknown
Опубликована: Май 5, 2024
Osteoarthritis
(OA)
poses
a
significant
healthcare
burden
with
limited
treatment
options.
While
genome-wide
association
studies
(GWAS)
have
identified
over
100
OA-associated
loci,
translating
these
findings
into
therapeutic
targets
remains
challenging.
Integrating
expression
quantitative
trait
loci
(eQTL),
3D
chromatin
structure,
and
other
genomic
approaches
OA
GWAS
data
offers
promising
approach
to
elucidate
disease
mechanisms;
however,
comprehensive
eQTL
maps
in
OA-relevant
tissues
conditions
remain
scarce.
We
mapped
gene
expression,
accessibility,
structure
primary
human
articular
chondrocytes
both
resting
OA-mimicking
conditions.
thousands
of
differentially
expressed
genes,
including
those
associated
differences
sex
age.
RNA-seq
from
101
donors
across
two
uncovered
3782
unique
eGenes,
420
that
exhibited
strong
condition-specific
effects.
Colocalization
signals
revealed
13
putative
risk
10
which
not
been
previously
identified.
Chromatin
accessibility
provided
insights
the
mechanisms
conditional
specificity
variants.
Our
shed
light
on
pathogenesis
highlight
potential
for
development.
Abstract
Osteoarthritis
(OA)
is
characterized
by
articular
cartilage
degeneration,
leading
to
pain
and
loss
of
joint
function.
Recent
studies
have
demonstrated
that
omega‐3
(ω3)
polyunsaturated
fatty
acid
(PUFA)
supplementation
can
decrease
injury‐induced
OA
progression
in
mice
fed
a
high‐fat
diet.
Furthermore,
PUFAs
been
shown
influence
the
mechanical
properties
chondrocyte
membranes,
suggesting
alterations
mechanosensitive
ion
channel
signaling
could
contribute
mechanism
which
ω3
decreased
pathogenesis.
Here,
we
hypothesized
may
alter
through
PIEZO1
(activated
changes
membrane
tension)
TRPV4
physiologic
mechano‐osmotic
signals),
as
these
cation
channels
progression.
Our
results
reduced
sensitivity
single‐cell
compression
pharmacologic
agonists
TRPV4,
with
having
most
significant
effects
overall.
We
also
found
ω6
PUFA
linoleic
(LA)
altered
biophysical
chondrocytes,
evidenced
increased
intracellular
lipid
droplet
formation
more
rapid
rupture
response
hypo‐osmotic
shock,
LA
increases
susceptibility
damage.
findings
underscore
differential
impacts
specific
on
provide
important
considerations
development
nutritional
interventions
prevent
or
treat
OA.