The role of retinal pigment epithelial senescence and the potential of senotherapeutics in age-related macular degeneration
Yingying Chen,
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Feipeng Jiang,
No information about this author
Yue Zeng
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et al.
Survey of Ophthalmology,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 1, 2025
Language: Английский
Pten Loss Triggers Progressive Photoreceptor Degeneration in an mTORC1-Independent Manner
Joseph Hanna,
No information about this author
Yacine Touahri,
No information about this author
Alissa Pak
No information about this author
et al.
Investigative Ophthalmology & Visual Science,
Journal Year:
2025,
Volume and Issue:
66(3), P. 45 - 45
Published: March 21, 2025
Purpose:
Silencing
Phosphatase
and
tensin
homolog
(Pten)
is
a
proposed
therapeutic
strategy
for
tissue
regeneration
to
treat
neurological
disorders.
However,
Pten
pleiotropic,
inhibiting
several
signaling
metabolic
pathways,
including
mTORC1
glycolysis,
both
pro-regenerative
in
certain
contexts.
This
study
aims
assess
the
long-term
impact
of
inactivating
on
photoreceptor
survival
retina
identify
downstream
pathway(s).
Methods:
We
assessed
retinal
integrity
conditional
knock-outs
(cKOs)
that
were
progenitor
cell
(RPC)-specific
(Pten
RPC-cKO),
congenital
model,
or
rod-specific
Rho-cKO).
examined
early
changes
gene
expression
used
immunostaining
photoreceptors,
reactive
astrocytes,
microglia,
angiogenesis,
subretinal
deposit
formation
from
postnatal
day
(P)
21
1
year
age.
RPC-cKO
explants
treated
with
rapamycin,
an
mTOR
inhibitor,
2-deoxy-D-glucose
(2DG),
glycolysis
inhibitor.
Results:
In
Pten-cKO
models,
retinas
display
signs
pathogenesis
as
photoreceptor-specific
downregulated
at
P0,
before
loss.
loss
triggers
progressive
rod
cone
degeneration
beginning
P21
RPC-cKOs
6
months
age
Rho-cKOs.
Activated
microglia
increased
are
observed
while
amyloid-β
deposits
develop
RPC-cKOs.
Rapamycin
accelerates
RPC-cKOs,
whereas
2DG
has
no
effect.
Conclusions:
Our
findings
suggest
loss,
either
RPCs
solely
mature
leads
exacerbated
by
suppression,
drawing
into
question
value
Pten-mTORC1
manipulations.
Language: Английский
Genetic Risk, Inflammation, and Therapeutics: An Editorial Overview of Recent Advances in Aging Brains and Neurodegeneration
Aging and Disease,
Journal Year:
2024,
Volume and Issue:
15(5), P. 1989 - 1989
Published: Jan. 1, 2024
Neurodegenerative
disorders,
including
Dementia,
Parkinson's
disease,
various
Vision
Multiple
sclerosis,
and
transsynaptic
degenerative
changes
represent
a
significant
challenge
in
aging
populations.
This
editorial
synthesizes
discusses
recent
advancements
understanding
the
genetic
environmental
factors
contributing
to
these
diseases.
Central
is
role
of
neuroinflammation
oxidative
stress,
which
exacerbate
neuronal
damage
accelerate
disease
progression.
Emerging
research
underscores
significance
mitochondrial
dysfunction
protein
aggregation
neurodegenerative
pathology,
highlighting
shared
mechanisms
across
disorders.
Innovative
therapeutic
strategies,
gene
therapy,
CRISPR-Cas
technology,
use
naturally
occurring
antioxidant
molecules,
are
being
investigated
target
manage
conditions.
Additionally,
lifestyle
interventions
such
as
exercise
healthy
diet
have
shown
promise
enhancing
brain
plasticity
reducing
neuroinflammation.
Advances
neuroimaging
biomarker
discovery
necessary
improve
early
diagnosis,
while
clinical
preclinical
studies
essential
for
translation
novel
treatments.
edition
aims
bridge
gap
between
molecular
applications,
offering
insights
into
potential
mitigate
impact
By
establishing
deeper
complex
processes,
we
aim
move
closer
effective
prevention
treatment
ultimately
improving
quality
life
those
affected
by
Language: Английский