METTL3-mediated methylation of RAC2 contributes to cell motility, oxidative stress and inflammation in TNF‐α-stimulated rheumatoid arthritis fibroblast-like synovial cells
Hua Ren,
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Guohua Wei,
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Zhen Kong
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et al.
Journal of Orthopaedic Surgery and Research,
Journal Year:
2025,
Volume and Issue:
20(1)
Published: Feb. 20, 2025
Rheumatoid
arthritis
(RA)
is
a
widely
prevalent
rheumatic
condition
causing
joint
inflammation
and
damage.
RNA
methylation
plays
an
important
role
in
RA.
Herein,
we
intended
to
investigate
the
function
of
methyltransferase-like
3
(METTL3)
its
N6-methyladenosine
(m6A)
regulation
for
ras-related
C3
botulinum
toxin
substrate
2
(RAC2)
MH7A
cells
were
treated
with
TNF-α
establish
RA
cell
model.
The
expression
analysis
was
performed
by
RT-qPCR
western
blot.
Cellular
behaviors
examined
CCK-8
assay,
flow
cytometry,
wound
healing
assay
transwell
assay.
Oxidative
stress
assessed
detecting
associated
indicators.
Inflammatory
cytokines
measured
via
enzyme-linked
immunosorbent
(ELISA).
Interaction
between
METTL3
RAC2
analyzed
immunoprecipitation
(RIP)
MeRIP
highly
expressed
tissues
TNF-α-stimulated
cells.
Knockdown
enhanced
apoptosis
reduced
proliferation,
migration,
invasion
after
treatment.
downregulation
suppressed
oxidative
inflammatory
response
TNF-α-treated
promoted
through
m6A
methylated
modification,
METTL3/RAC2
could
activate
AKT
pathway.
overexpression
reversed
effects
knockdown
on
motility,
inflammation.
above
results
demonstrated
that
facilitated
progression
downregulating
dependent
mechanism
Language: Английский
Role of activating transcription factor 3 as a mediator of the protective effects of Berberine against lipopolysaccharide-stimulated SW982 cells and in rheumatoid arthritis animal models
Kyu-Young Yeon,
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Seongmi Ji,
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Hyae Gyeong Cheon
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et al.
Toxicology and Applied Pharmacology,
Journal Year:
2025,
Volume and Issue:
unknown, P. 117279 - 117279
Published: Feb. 1, 2025
Language: Английский
Near-Infrared Fluorescent Lysosomal Viscosity Probe with Strong Solid Fluorescence for Rapid Imaging of Rheumatoid Arthritis
Analytical Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 6, 2025
Rheumatoid
arthritis
(RA)
is
a
chronic
disease
of
widespread
concern
worldwide,
and
there
an
urgent
need
to
develop
sensitive
methods
for
the
rapid
detection
RA.
Previous
studies
have
shown
that
RA
closely
related
lysosomal
dysfunction.
Lysosomal
viscosity
important
microenvironmental
parameter
reflecting
state
lysosomes,
but
due
lack
probes
demonstrate
correlation
between
RA,
changes
in
during
remain
unclear.
For
this
purpose,
we
report
herein
lysosome-targeted
near-infrared
fluorescent
molecular
rotor
probe
DSMP
investigate
This
utilizes
dicyanomethylene-4H-benzothiopyran
as
electron
acceptor
fluorophore
piperazine
unit
donor
targeting
group
lysosomes.
In
addition,
shows
strong
solid
fluorescence
response
can
effectively
target
lysosomes
detect
live
cells.
Based
on
this,
established
mouse
model
using
λ-carrageenan.
Mice
imaging
show
quickly
image
tissues
exhibit
signals
significantly
brighter
than
those
normal
joint
tissues.
indicates
increase
RA;
therefore,
serve
indicator
be
effective
tool
research.
Language: Английский
Immune imbalance in Lupus Nephritis: The intersection of T-Cell and ferroptosis
Yunhe Fan,
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Kuai Ma,
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Yumeng Lin
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et al.
Frontiers in Immunology,
Journal Year:
2024,
Volume and Issue:
15
Published: Dec. 12, 2024
Ferroptosis
is
a
novel
form
of
cell
death
characterized
by
unlimited
accumulation
iron-dependent
lipid
peroxides.
It
often
accompanied
disease,
and
the
relationship
between
ferroptosis
immune
cells
regulation
has
been
attracting
increasing
attention.
Initially,
it
was
found
in
cancer
research
that
inhibition
regulatory
T
(Treg)
promotion
CD8+
jointly
promoted
formation
an
immune-tolerant
environment
tumors.
T-cell
subsequently
to
have
immunoregulatory
effects
other
diseases.
As
autoimmune
disease
imbalance,
attracted
attention
for
its
potential
regulating
balance
lupus
nephritis.
This
article
reviews
metabolic
processes
within
different
subsets
nephritis
(LN),
including
follicular
helper
(TFH)
cells,
(Th)17
Th1
Th2
Treg
reveals
these
cellular
metabolisms
not
only
facilitate
imbalance
but
are
also
closely
associated
with
occurrence
ferroptosis.
Consequently,
we
hypothesize
targeting
pathways
could
become
direction
effectively
treating
altering
differentiation
incidence
Language: Английский