The Journal of Physical Chemistry B,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 17, 2025
Poly(ADP-ribose)
polymerase1
(PARP1)
plays
a
vital
role
in
DNA
repair,
and
its
inhibition
cancer
cells
may
cause
cell
apoptosis.
In
this
study,
we
investigated
the
effects
of
PARP1
variant,
V762A,
which
is
strongly
associated
with
several
cancers
humans,
on
by
three
FDA-approved
inhibitors:
niraparib,
rucaparib,
talazoparib.
Specifically,
compared
mutant
to
that
wild-type
(WT)
PARP1.
Additionally,
how
mutation
influences
binding
these
inhibitors
Our
work
suggests
while
exhibits
only
minor
differences
residual
fluctuations,
backbone
deviations,
residue
motion
correlations
WT
under
niraparib
rucaparib
inhibitions,
it
shows
significant
distinct
features
when
inhibited
Among
talazoparib
uniquely
lowers
average
fluctuations
than
including
lower
mutant's
N-
C-terminal
residues
catalytic
domain,
conserved
H-Y-E
traid
residues,
donor
loop
(D-loop)
are
important
for
catalysis
more
effectively
other
inhibitions.
However,
also
significantly
enhances
destabilizing
interactions
between
site
HD
domain
WT.
Further,
among
disrupts
functional
terminal
regions
mutant,
otherwise
present
The
do
not
affect
PARP1's
essential
dynamics.
Lastly,
bind
V762A
WT,
similar
free
energies
them.
Cell,
Год журнала:
2023,
Номер
186(21), С. 4475 - 4495
Опубликована: Окт. 1, 2023
ADP-ribosylation
is
a
ubiquitous
modification
of
biomolecules,
including
proteins
and
nucleic
acids,
that
regulates
various
cellular
functions
in
all
kingdoms
life.
The
recent
emergence
new
technologies
to
study
has
reshaped
our
understanding
the
molecular
mechanisms
govern
establishment,
removal,
recognition
this
modification,
as
well
its
impact
on
organismal
function.
These
advances
have
also
revealed
intricate
involvement
human
physiology
pathology
enormous
potential
their
manipulation
holds
for
therapy.
In
review,
we
present
state-of-the-art
findings
covering
work
structural
biology,
biochemistry,
cell
clinical
aspects
ADP-ribosylation.
Nature,
Год журнала:
2024,
Номер
628(8007), С. 433 - 441
Опубликована: Март 20, 2024
Abstract
An
important
advance
in
cancer
therapy
has
been
the
development
of
poly(ADP-ribose)
polymerase
(PARP)
inhibitors
for
treatment
homologous
recombination
(HR)-deficient
cancers
1–6
.
PARP
trap
PARPs
on
DNA.
The
trapped
are
thought
to
block
replisome
progression,
leading
formation
DNA
double-strand
breaks
that
require
HR
repair
7
Here
we
show
PARP1
functions
together
with
TIMELESS
and
TIPIN
protect
early
S
phase
from
transcription–replication
conflicts.
Furthermore,
synthetic
lethality
deficiency
is
due
an
inability
damage
caused
by
conflicts,
rather
than
PARPs.
Along
these
lines,
inhibiting
transcription
elongation
rendered
HR-deficient
cells
resistant
depleting
small-interfering
RNA
was
lethal
deficiency.
Thus,
enzymatic
activity
may
suffice
efficacy
settings.
Frontiers in Cell and Developmental Biology,
Год журнала:
2023,
Номер
11
Опубликована: Март 22, 2023
BRCA1
and
BRCA2
play
a
critical
role
in
variety
of
molecular
processes
related
to
DNA
metabolism,
including
homologous
recombination
mediating
the
replication
stress
response.
Individuals
with
mutations
(
BRCA1/2
)
genes
have
significantly
higher
risk
developing
various
types
cancers,
especially
cancers
breast,
ovary,
pancreas,
prostate.
Currently,
Food
Drug
Administration
(FDA)
has
approved
four
PARP
inhibitors
(PARPi)
treat
mutations.
In
this
review,
we
will
first
summarize
clinical
outcomes
FDA-approved
PARPi
treating
deficient
cancers.
We
then
discuss
evidence
supporting
hypothesis
that
cytotoxic
effect
is
likely
due
inducing
excessive
at
difficult-to-replicate
(DTR)
genomic
regions
mutated
tumors.
Finally,
ongoing
preclinical
studies
on
how
combine
immuno-oncology
drugs
further
improve
outcomes.
Nucleic Acids Research,
Год журнала:
2023,
Номер
51(5), С. 2215 - 2237
Опубликована: Фев. 16, 2023
Abstract
PARP1
is
a
DNA-dependent
ADP-Ribose
transferase
with
ADP-ribosylation
activity
that
triggered
by
DNA
breaks
and
non-B
structures
to
mediate
their
resolution.
was
also
recently
identified
as
component
of
the
R-loop-associated
protein-protein
interaction
network,
suggesting
potential
role
for
in
resolving
this
structure.
R-loops
are
three-stranded
nucleic
acid
consist
RNA–DNA
hybrid
displaced
non-template
strand.
involved
crucial
physiological
processes
but
can
be
source
genome
instability
if
persistently
unresolved.
In
study,
we
demonstrate
binds
vitro
associates
R-loop
formation
sites
cells
which
activates
its
activity.
Conversely,
inhibition
or
genetic
depletion
causes
an
accumulation
unresolved
promotes
genomic
instability.
Our
study
reveals
novel
sensor
highlights
suppressor
Therapeutic Advances in Medical Oncology,
Год журнала:
2024,
Номер
16
Опубликована: Янв. 1, 2024
The
relatively
high
prevalence
of
alterations
in
the
homologous
recombination
repair
(HRR)
pathway
described
advanced
prostate
cancer
provides
a
unique
opportunity
to
develop
therapeutic
strategies
that
take
advantage
decreased
tumor
ability
DNA
damage.
Poly
ADP-ribose
polymerase
(PARP)
inhibitors
have
been
demonstrated
improve
outcomes
metastatic
castration-resistant
(mCRPC)
patients
with
HRR
defects,
particularly
those
BRCA1/2
alterations.
To
expand
benefit
PARPi
without
detectable
alterations,
multiple
studies
are
addressing
potential
synergies
between
PARP
inhibition
(PARPi)
and
androgen
receptor
(ARSi),
radiation,
radioligand
therapy,
chemotherapy,
or
immunotherapy,
these
also
being
evaluated
hormone-sensitive
setting.
In
this
review,
we
summarize
development
cancer,
synergies,
combinations
investigated
as
well
future
directions
for
management
disease.
Molecular Cell,
Год журнала:
2023,
Номер
83(10), С. 1743 - 1760.e11
Опубликована: Апрель 27, 2023
PARP1,
an
established
anti-cancer
target
that
regulates
many
cellular
pathways,
including
DNA
repair
signaling,
has
been
intensely
studied
for
decades
as
a
poly(ADP-ribosyl)transferase.
Although
recent
studies
have
revealed
the
prevalence
of
mono-ADP-ribosylation
upon
damage,
it
was
unknown
whether
this
signal
plays
active
role
in
cell
or
is
just
byproduct
poly-ADP-ribosylation.
By
engineering
SpyTag-based
modular
antibodies
sensitive
and
flexible
detection
mono-ADP-ribosylation,
fluorescence-based
sensors
live-cell
imaging,
we
demonstrate
serine
constitutes
second
wave
PARP1
signaling
shaped
by
HPF1/PARP1
ratio.
Multilevel
chromatin
proteomics
reveals
histone
readers,
RNF114,
ubiquitin
ligase
recruited
to
lesions
through
zinc-finger
domain,
modulating
damage
response
telomere
maintenance.
Our
work
provides
technological
framework
illuminating
ADP-ribosylation
wide
range
applications
biological
contexts
establishes
important
information
carrier
signaling.
Biochemical Society Transactions,
Год журнала:
2023,
Номер
51(1), С. 207 - 221
Опубликована: Янв. 6, 2023
The
DNA
damage
response
(DDR)
is
an
elegant
system,
coordinating
repair
with
cell
cycle
checkpoints,
that
evolved
to
protect
living
organisms
from
the
otherwise
fatal
levels
of
inflicted
by
endogenous
and
environmental
sources.
Since
many
agents
used
treat
cancer;
radiotherapy
cytotoxic
chemotherapy,
work
damaging
DDR
represents
a
mechanism
resistance.
original
rational
for
development
drugs
inhibit
was
overcome
this
resistance
but
clinical
studies
using
approach
have
not
led
improvements
in
therapeutic
index.
A
more
exciting
exploit
cancer-specific
defects
DDR,
represent
vulnerabilities
tumour
opportunity
selectively
target
tumour.
PARP
inhibitors
(PARPi)
kill
homologous
recombination
defective
(HRD,
e.g.
through
BRCA
mutation)
cells.
This
has
proven
successful
clinically
there
are
now
six
PARPi
approved
cancer
therapy.
Drugs
targeting
other
aspects
under
pre-clinical
evaluation
as
monotherapy
combination
studies.
For
promising
therapy
be
fully
realised
reliable
biomarkers
needed
identify
tumours
exploitable
defect
applications.
possibility
some
combinations
may
result
toxicity
normal
tissues
also
needs
considered.
brief
overview
current
status
such
described
here.
PARP1
and
PARP2
detect
DNA
breaks,
which
activates
their
catalytic
production
of
poly(ADP-ribose)
that
recruits
repair
factors
contributes
to
PARP1/2
release
from
DNA.
PARP
inhibitors
(PARPi)
are
used
in
cancer
treatment
target
activity,
interfering
with
increasing
persistence
on
damage.
In
addition,
certain
PARPi
exert
allosteric
effects
increase
retention
However,
no
clinical
exhibit
this
behavior
toward
PARP1.
contrast,
we
show
an
effect
retains
breaks
a
manner
depends
communication
between
the
binding
regions.
Using
mutant
mimics
inhibitor
effect,
observed
increased
at
cellular
damage
sites.
The
AZD5305
also
exhibited
clear
reverse
PARP2.
Our
results
can
help
explain
toxicity
suggest
ways
improve
moving
forward.
Nature Communications,
Год журнала:
2024,
Номер
15(1)
Опубликована: Март 23, 2024
The
effectiveness
of
poly
(ADP-ribose)
polymerase
inhibitors
(PARPi)
in
creating
single-stranded
DNA
gaps
and
inducing
sensitivity
requires
the
FANCJ
helicase.
Yet,
how
relates
to
PARP1
inhibition
or
trapping,
which
contribute
PARPi
toxicity,
remains
unclear.
Here,
we
find
hinges
on
S-phase
activity,
is
reduced
deficient
cells
as
G-quadruplexes
sequester
MSH2.
Additionally,
loss
FANCJ-MLH1
interaction
diminishes
activity;
however,
depleting
MSH2
reinstates
gaps.
Indicating
sequestered
trapped
are
distinct,
increases
resistance
susceptible
trapping.
However,
with
BRCA1
deficiency,
mirrors
inhibition,
detrimental
commonality
being
activity.
These
insights
underline
crucial
role
activity
during
replication
emphasize
importance
understanding
drug
mechanisms
for
enhancing
therapeutic
response.