Frontiers in Immunology,
Год журнала:
2024,
Номер
15
Опубликована: Янв. 25, 2024
The
tryptophan-degrading
enzyme
indoleamine
2,3-dioxygenase
1
(IDO1)
is
a
plastic
immune
checkpoint
molecule
that
potently
orchestrates
responses
within
the
tumor
microenvironment
(TME).
As
heme-containing
protein,
IDO1
catalyzes
conversion
of
essential
amino
acid
tryptophan
into
immunoactive
metabolites,
called
kynurenines.
By
depleting
and
enriching
TME
with
kynurenines,
catalytic
activity
shapes
an
immunosuppressive
TME.
Accordingly,
inducible
or
constitutive
expression
in
cancer
correlates
negative
prognosis
for
patients,
representing
one
critical
tumor-escape
mechanisms.
However,
clinically
trialed
inhibitors
disappointed
expected
anti-tumor
efficacy.
Interestingly,
non-enzymatic
apo-form
still
active
as
transducing
capable
promoting
immunoregulatory
phenotype
dendritic
cells
(DCs)
well
pro-tumorigenic
behavior
murine
melanoma.
Moreover,
inhibitor
epacadostat
can
induce
tolerogenic
plasmacytoid
DCs,
overcoming
inhibition
IDO1.
Based
on
this
recent
evidence,
plasticity
was
investigated
human
ovarian
cell
line,
SKOV-3,
constitutively
expresses
dynamic
balance
between
holo-
apo-protein,
thus
potentially
endowed
dual
function
(i.e.,
enzymatic
non-enzymatic).
Besides
inhibiting
activity,
persistently
stabilizes
favoring
its
tyrosine-phosphorylation
association
phosphatase
SHP-2.
In
SKOV-3
cells,
both
these
early
molecular
events
activate
signaling
pathway
transduced
by
which
independent
contributes
to
tumorigenic
cells.
Overall,
our
findings
unveiled
new
mechanism
action
target,
repositioning
stabilizer
IDO1,
tumor.
This
could
contribute
clarify
lack
effectiveness
clinical
trials
shed
light
innovative
immunotherapeutic
strategies
tackle
target.
Signal Transduction and Targeted Therapy,
Год журнала:
2024,
Номер
9(1)
Опубликована: Март 8, 2024
Ferroptosis
is
a
non-apoptotic
form
of
regulated
cell
death
characterized
by
the
lethal
accumulation
iron-dependent
membrane-localized
lipid
peroxides.
It
acts
as
an
innate
tumor
suppressor
mechanism
and
participates
in
biological
processes
tumors.
Intriguingly,
mesenchymal
dedifferentiated
cancer
cells,
which
are
usually
resistant
to
apoptosis
traditional
therapies,
exquisitely
vulnerable
ferroptosis,
further
underscoring
its
potential
treatment
approach
for
cancers,
especially
refractory
cancers.
However,
impact
ferroptosis
on
extends
beyond
direct
cytotoxic
effect
cells.
induction
not
only
inhibits
but
also
promotes
development
due
negative
anticancer
immunity.
Thus,
comprehensive
understanding
role
crucial
successful
translation
therapy
from
laboratory
clinical
applications.
In
this
review,
we
provide
overview
recent
advancements
cancer,
covering
molecular
mechanisms,
functions,
regulatory
pathways,
interactions
with
microenvironment.
We
summarize
applications
immunotherapy,
radiotherapy,
systemic
therapy,
well
inhibition
various
conditions.
finally
discuss
markers,
current
challenges
future
directions
cancer.
Signal Transduction and Targeted Therapy,
Год журнала:
2023,
Номер
8(1)
Опубликована: Март 22, 2023
Abstract
Tumour
cells
have
exquisite
flexibility
in
reprogramming
their
metabolism
order
to
support
tumour
initiation,
progression,
metastasis
and
resistance
therapies.
These
reprogrammed
activities
include
a
complete
rewiring
of
the
bioenergetic,
biosynthetic
redox
status
sustain
increased
energetic
demand
cells.
Over
last
decades,
cancer
field
has
seen
an
explosion
new
biochemical
technologies
giving
more
tools
than
ever
before
navigate
this
complexity.
Within
cell
or
tissue,
metabolites
constitute
direct
signature
molecular
phenotype
thus
profiling
concrete
clinical
applications
oncology.
Metabolomics
fluxomics,
are
key
technological
approaches
that
mainly
revolutionized
enabling
researchers
both
qualitative
mechanistic
model
cancer.
Furthermore,
upgrade
from
bulk
single-cell
analysis
provided
unprecedented
opportunity
investigate
biology
at
cellular
resolution
allowing
depth
quantitative
complex
heterogenous
diseases.
More
recently,
advent
functional
genomic
screening
allowed
identification
pathways,
processes,
biomarkers
novel
therapeutic
targets
concert
with
other
allow
patient
stratification
treatment
regimens.
This
review
is
intended
be
guide
for
metabolism,
highlighting
current
emerging
technologies,
emphasizing
advantages,
disadvantages
potential
leading
development
innovative
anti-cancer
Experimental & Molecular Medicine,
Год журнала:
2023,
Номер
55(7), С. 1371 - 1379
Опубликована: Июль 3, 2023
Amino
acids
are
fundamental
units
of
molecular
components
that
essential
for
sustaining
life;
however,
their
metabolism
is
closely
interconnected
to
the
control
systems
cell
function.
Tryptophan
(Trp)
an
amino
acid
catabolized
by
complex
metabolic
pathways.
Several
resulting
Trp
metabolites
bioactive
and
play
central
roles
in
physiology
pathophysiology.
Additionally,
various
physiological
functions
mutually
regulated
gut
microbiota
intestine
coordinately
maintain
intestinal
homeostasis
symbiosis
under
steady
state
conditions
during
immune
response
pathogens
xenotoxins.
Cancer
inflammatory
diseases
associated
with
dysbiosis-
host-related
aberrant
inactivation
aryl
hydrocarbon
receptor
(AHR),
which
a
several
metabolites.
In
this
review,
we
focus
on
mechanisms
through
converges
AHR
activation
modulation
function
restoration
tissue
how
these
processes
can
be
targeted
using
therapeutic
approaches
cancer
autoimmune
diseases.
Abstract
Emerging
evidence
reveals
that
amino
acid
metabolism
plays
an
important
role
in
ferroptotic
cell
death.
The
conversion
of
methionine
to
cysteine
is
well
known
protect
tumour
cells
from
ferroptosis
upon
starvation
through
transamination.
However,
whether
acids‐produced
metabolites
participate
independent
the
pathway
largely
unknown.
Here,
authors
show
tryptophan
serotonin
(5‐HT)
and
3‐hydroxyanthranilic
(3‐HA)
remarkably
facilitate
escape
distinct
cysteine‐mediated
inhibition.
Mechanistically,
both
5‐HT
3‐HA
act
as
potent
radical
trapping
antioxidants
(RTA)
eliminate
lipid
peroxidation,
thereby
inhibiting
Monoamine
oxidase
A
(MAOA)
markedly
abrogates
protective
effect
via
degrading
5‐HT.
Deficiency
MAOA
renders
cancer
resistant
treatment.
Kynureninase
(KYNU),
which
essential
for
production,
confers
death,
whereas
3‐hydroxyanthranilate
3,4‐dioxygenase
(HAAO)
significantly
blocks
mediated
inhibition
by
consuming
3‐HA.
In
addition,
expression
level
HAAO
positively
correlated
with
peroxidation
clinical
outcome.
Together,
findings
demonstrate
works
a
new
anti‐ferroptotic
promote
growth,
targeting
this
will
be
promising
therapeutic
approach
Redox Biology,
Год журнала:
2024,
Номер
69, С. 103030 - 103030
Опубликована: Янв. 3, 2024
Ferroptosis
is
a
type
of
programmed
cell
death
resulting
from
iron
overload-dependent
lipid
peroxidation,
and
could
be
promoted
by
activating
transcription
factor
3
(ATF3).
SIRT1
an
enzyme
accounting
for
removing
acetylated
lysine
residues
target
proteins
consuming
NAD+,
but
its
role
remains
elusive
in
ferroptosis
ATF3.
In
this
study,
we
found
was
activated
during
the
process
RSL3-induced
glioma
ferroptosis.
Moreover,
aggravated
activator
SRT2183,
suppressed
SIRT
inhibitor
EX527
or
when
silenced
with
siRNA.
These
indicated
sensitized
cells
to
Furthermore,
expressional
upregulation
nuclear
translocation
Silence
ATF3
siRNA
attenuated
increases
ferrous
downregulation
SLC7A11
GPX4
depletion
cysteine
GSH.
Thus,
inducting
activation.
Mechanistically,
activation
reinforced
decline
NAD+
FK866
that
inhibit
NAD
+
synthesis
via
salvage
pathway,
intracellular
maintained
at
higher
level
supplement
exogenous
NAD+.
Notably,
caused
RSL3
enhanced
further
inhibited
EX527.
consumption
Finally,
inducing
reactive
oxygen
species-dependent
AROS.
Together,
our
study
revealed
AROS
sensitizes
ATF3-dependent
inhibition
GPX4.
Journal of Cellular and Molecular Medicine,
Год журнала:
2025,
Номер
29(2)
Опубликована: Янв. 1, 2025
ABSTRACT
The
clinical
application
of
doxorubicin
(DOX)
is
limited
due
to
its
cardiotoxicity,
which
primarily
attributed
interaction
with
iron
in
mitochondria,
leading
lipid
peroxidation
and
myocardial
ferroptosis.
This
study
aimed
investigate
the
role
gut
microbiota‐derived
metabolite,
indole‐3‐lactic
acid
(ILA),
mitigating
DOX‐induced
cardiotoxicity
(DIC).
Cardiac
function,
pathological
changes,
ferroptosis
were
assessed
vivo.
cardioprotective
effects
mechanisms
ILA
explored
using
multi‐omics
approaches,
including
single‐nucleus
RNA
sequencing
(snRNA‐seq)
bulk
RNA‐seq,
further
validated
Nrf2
knockout
mice.
findings
revealed
that
DOX
treatment
disrupted
microbiota,
significantly
reducing
levels
tryptophan
metabolite
ILA.
In
DIC
models,
supplementation
markedly
improved
cardiac
reduced
collagen
deposition,
mitigated
atrophy.
snRNA‐seq
analyses
indicated
played
a
crucial
Experimental
data
demonstrated
decreased
both
mice
DOX‐treated
H9C2
cells,
evidenced
by
restoration
GPX4
SLC7A11
reduction
ACSL4.
Mechanistically,
functions
as
ligand
for
aryl
hydrocarbon
receptor
(AhR),
upregulation
expression.
protective
against
abolished
silencing
AhR.
Moreover,
beneficial
on
eliminated
Nrf2‐deficient
conclusion,
exerts
therapeutic
inhibiting
through
activation
AhR/Nrf2
signalling
pathway.
Identifying
microbial
could
offer
viable
strategies
DIC.