Cancers,
Journal Year:
2023,
Volume and Issue:
15(16), P. 4155 - 4155
Published: Aug. 17, 2023
Multiple
myeloma
(MM)
is
a
plasma
cell
malignancy
characterized
by
several
genetic
abnormalities,
including
chromosomal
translocations,
genomic
deletions
and
gains,
point
mutations.
DNA
damage
response
(DDR)
repair
mechanisms
are
altered
in
MM
to
allow
for
tumor
development,
progression,
resistance
therapies.
Damaged
rarely
induces
an
apoptotic
response,
given
the
presence
of
ataxia-telangiectasia
mutated
(ATM)
loss-of-function
or
mutations,
as
well
deletions,
downregulation
protein
p53
(TP53)
p73
(TP73).
Moreover,
either
hyperactive
defective
rapid
correction
permissive
survival.
Medications
used
treat
patients
with
can
induce
damage,
direct
effects
(mono-adducts
induced
melphalan),
result
reactive
oxygen
species
(ROS)
production
proteasome
inhibitors
such
bortezomib.
In
this
review,
we
will
describe
DDR
normal
tissues,
contribution
these
pathways
disease
progression
other
phenotypes,
potential
therapeutic
opportunities
MM.
Science,
Journal Year:
2022,
Volume and Issue:
378(6623), P. 983 - 989
Published: Dec. 1, 2022
Neurons
harbor
high
levels
of
single-strand
DNA
breaks
(SSBs)
that
are
targeted
to
neuronal
enhancers,
but
the
source
this
endogenous
damage
remains
unclear.
Using
two
systems
postmitotic
lineage
specification-induced
pluripotent
stem
cell-derived
neurons
and
transdifferentiated
macrophages-we
show
thymidine
glycosylase
(TDG)-driven
excision
methylcytosines
oxidized
with
ten-eleven
translocation
enzymes
(TET)
is
a
SSBs.
Although
macrophage
differentiation
favors
short-patch
base
repair
fill
in
single-nucleotide
gaps,
also
frequently
use
long-patch
subpathway.
Disrupting
gap-filling
process
using
anti-neoplastic
cytosine
analogs
triggers
response
cell
death,
which
dependent
on
TDG.
Thus,
TET-mediated
active
demethylation
promotes
damage,
normally
safeguards
identity
can
provoke
neurotoxicity
after
anticancer
treatments.
Signal Transduction and Targeted Therapy,
Journal Year:
2023,
Volume and Issue:
8(1)
Published: Sept. 8, 2023
Genome
instability
has
been
identified
as
one
of
the
enabling
hallmarks
in
cancer.
DNA
damage
response
(DDR)
network
is
responsible
for
maintenance
genome
integrity
cells.
As
cancer
cells
frequently
carry
DDR
gene
deficiencies
or
suffer
from
replicative
stress,
targeting
processes
could
induce
excessive
damages
(or
unrepaired
DNA)
that
eventually
lead
to
cell
death.
Poly
(ADP-ribose)
polymerase
(PARP)
inhibitors
have
brought
impressive
benefit
patients
with
breast
(BRCA)
mutation
homologous
recombination
deficiency
(HRD),
which
proves
concept
synthetic
lethality
treatment.
Moreover,
other
two
scenarios
inhibitor
application,
replication
stress
and
combination
chemo-
radio-
therapy,
are
under
active
clinical
exploration.
In
this
review,
we
revisited
progress
therapy
beyond
launched
first-generation
PARP
inhibitors.
Next
generation
PARP1
selective
inhibitors,
maintain
efficacy
while
mitigating
side
effects,
may
diversify
application
clinic.
Albeit
unavoidable
on-mechanism
toxicities,
several
small
molecules
checkpoints
(gatekeepers)
shown
great
promise
preliminary
results,
warrant
further
evaluations.
addition,
repair
pathways
(caretakers)
also
preclinical
development.
With
these
progresses
efforts,
envision
a
new
wave
innovations
within
come
age.
Trends in Biochemical Sciences,
Journal Year:
2023,
Volume and Issue:
49(1), P. 68 - 78
Published: Nov. 30, 2023
DNA
single-strand
breaks
(SSBs)
are
among
the
most
common
lesions
arising
in
human
cells,
with
tens
to
hundreds
of
thousands
each
cell,
day.
Cells
have
efficient
mechanisms
for
sensing
and
repair
these
ubiquitous
lesions,
but
failure
processes
rapidly
remove
SSBs
can
lead
a
variety
pathogenic
outcomes.
The
threat
posed
by
unrepaired
is
illustrated
existence
at
least
six
genetic
diseases
which
SSB
(SSBR)
defective,
all
characterised
neurodevelopmental
and/or
neurodegenerative
pathology.
Here,
I
review
current
understanding
how
arise
impact
on
critical
molecular
processes,
such
as
replication
gene
transcription,
their
links
disease.
Cancers,
Journal Year:
2023,
Volume and Issue:
15(6), P. 1897 - 1897
Published: March 22, 2023
First-line
cancer
treatments
successfully
eradicate
the
differentiated
tumour
mass
but
are
comparatively
ineffective
against
stem
cells
(CSCs),
a
self-renewing
subpopulation
thought
to
be
responsible
for
initiation,
metastasis,
heterogeneity,
and
recurrence.
CSCs
thus
presented
as
principal
target
elimination
during
treatment.
However,
challenging
drug
because
of
numerous
intrinsic
extrinsic
mechanisms
resistance.
One
such
mechanism
that
remains
relatively
understudied
is
DNA
damage
response
(DDR).
presumed
possess
properties
enable
enhanced
repair
efficiency
relative
their
highly
proliferative
bulk
progeny,
facilitating
improved
double-strand
breaks
induced
by
radiotherapy
most
chemotherapeutics.
This
can
occur
through
multiple
mechanisms,
including
increased
expression
splicing
fidelity
genes,
robust
activation
cell
cycle
checkpoints,
elevated
homologous
recombination-mediated
repair.
Herein,
we
summarise
current
knowledge
concerning
genome
integrity
in
non-transformed
CSCs,
discuss
therapeutic
opportunities
within
DDR
re-sensitising
genotoxic
stressors,
consider
challenges
posed
regarding
unbiased
identification
novel
DDR-directed
strategies
CSCs.
A
better
understanding
mediating
chemo/radioresistance
could
lead
approaches,
thereby
enhancing
treatment
efficacy
patients.
Cancers,
Journal Year:
2024,
Volume and Issue:
16(4), P. 680 - 680
Published: Feb. 6, 2024
In
recent
years,
the
emergence
of
cancer
drug
resistance
has
been
one
crucial
tumor
hallmarks
that
are
supported
by
level
genetic
heterogeneity
and
complexities
at
cellular
levels.
Oxidative
stress,
immune
evasion,
metabolic
reprogramming,
overexpression
ABC
transporters,
stemness
among
several
key
contributing
molecular
response
mechanisms.
Topo-active
drugs,
e.g.,
doxorubicin
topotecan,
clinically
active
utilized
extensively
against
a
wide
variety
human
tumors
often
result
in
development
failure
to
therapy.
Thus,
there
is
an
urgent
need
for
incremental
comprehensive
understanding
mechanisms
specifically
context
topo-active
drugs.
This
review
delves
into
intricate
mechanistic
aspects
these
intracellular
extracellular
explores
use
potential
combinatorial
approaches
utilizing
various
drugs
inhibitors
pathways
involved
resistance.
We
believe
this
will
help
guide
basic
scientists,
pre-clinicians,
clinicians,
policymakers
toward
holistic
interdisciplinary
strategies
transcend
resistance,
renewing
optimism
ongoing
battle
cancer.
Signal Transduction and Targeted Therapy,
Journal Year:
2025,
Volume and Issue:
10(1)
Published: March 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.
Pharmaceutics,
Journal Year:
2025,
Volume and Issue:
17(2), P. 176 - 176
Published: Jan. 30, 2025
Proton
therapy
represents
a
groundbreaking
advancement
in
cancer
radiotherapy,
leveraging
the
unique
spatial
energy
distribution
of
protons
to
deliver
precise,
high-dose
radiation
tumors
while
sparing
surrounding
healthy
tissues.
Despite
its
clinical
success,
proton
faces
challenges
optimizing
therapeutic
precision
and
efficacy.
Recent
research
has
highlighted
potential
gold
nanoparticles
enhance
outcomes.
Due
their
high
atomic
number
favorable
biological
properties,
act
as
radiosensitizers
by
amplifying
generation
secondary
electrons
reactive
oxygen
species
upon
irradiation.
This
enhances
DNA
damage
tumor
cells
preserving
Additionally,
functionalization
with
tumor-targeting
ligands
offers
improved
precision,
making
more
effective
against
broader
range
cancers.
review
synthesizes
current
knowledge
on
mechanisms
nanoparticle
radiosensitization,
preclinical
evidence,
technological
hurdles
that
must
be
addressed
integrate
this
promising
approach
into
practice,
aiming
advance
efficacy
accessibility
therapy.
Journal of Hematology & Oncology,
Journal Year:
2022,
Volume and Issue:
15(1)
Published: Oct. 17, 2022
Abstract
Continuous
cell
division
is
a
hallmark
of
cancer,
and
the
underlying
mechanism
tumor
genomics
instability.
Cell
cycle
checkpoints
are
critical
for
enabling
an
orderly
maintaining
genome
stability
during
division.
Based
on
their
distinct
functions
in
control,
classified
into
two
groups:
DNA
damage
replication
stress
checkpoints.
The
(ATM-CHK2-p53)
primarily
monitor
genetic
errors
arrest
progression
to
facilitate
repair.
Unfortunately,
genes
involved
frequently
mutated
human
malignancies.
In
contrast,
associated
with
(ATR-CHK1-WEE1)
rarely
tumors,
cancer
cells
highly
dependent
these
prevent
catastrophe
secure
integrity.
At
present,
poly
(ADP-ribose)
polymerase
inhibitors
(PARPi)
operate
through
“synthetic
lethality”
mutant
repair
pathways
cells.
However,
increasing
number
patients
acquiring
PARP
inhibitor
resistance
after
prolonged
treatment.
Recent
work
suggests
that
combination
therapy
targeting
PARPs
act
synergistically
increase
errors,
compromise
machinery,
disrupt
cycle,
thereby
death
rate
deficiency
or
resistance.
We
highlight
combinational
strategy
involving
inhibition
major
checkpoint
pathways,
ATM-CHK2-TP53
ATR-CHK1-WEE1.
biological
functions,
mechanisms
against
inhibitors,
advances
preclinical
research,
clinical
trials
also
reviewed.
Molecular Cell,
Journal Year:
2023,
Volume and Issue:
84(1), P. 70 - 79
Published: Dec. 15, 2023
Genome
damage
and
transcription
are
intimately
linked.
Tens
to
hundreds
of
thousands
DNA
lesions
arise
in
each
cell
day,
many
which
can
directly
or
indirectly
impede
transcription.
Conversely,
the
process
gene
expression
is
itself
a
source
endogenous
as
result
susceptibility
single-stranded
damage,
conflicts
with
replication
machinery,
engagement
by
cells
topoisomerases
base
excision
repair
enzymes
regulate
initiation
progression
Although
such
processes
tightly
regulated
normally
accurate,
on
occasion,
they
become
abortive
leave
behind
breaks
that
drive
genome
rearrangements,
instability,
death.