Cancer Immunology Research,
Journal Year:
2024,
Volume and Issue:
12(7), P. 854 - 875
Published: April 26, 2024
Abstract
Glutamine
metabolism
in
tumor
microenvironments
critically
regulates
antitumor
immunity.
Using
the
glutamine-antagonist
prodrug
JHU083,
we
report
potent
growth
inhibition
urologic
tumors
by
JHU083-reprogrammed
tumor-associated
macrophages
(TAMs)
and
tumor-infiltrating
monocytes.
We
show
JHU083-mediated
glutamine
antagonism
induced
TNF,
proinflammatory,
mTORC1
signaling
intratumoral
TAM
clusters.
TAMs
also
exhibited
increased
cell
phagocytosis
diminished
proangiogenic
capacities.
In
vivo
of
consumption
resulted
glycolysis,
a
broken
tricarboxylic
acid
(TCA)
cycle,
purine
disruption.
Although
effect
on
T
cells
was
moderate,
JHU083
promoted
stem
cell–like
phenotype
CD8+
decreased
abundance
regulatory
cells.
Finally,
caused
global
shutdown
glutamine-utilizing
metabolic
pathways
cells,
leading
to
reduced
HIF-1α,
c-MYC
phosphorylation,
induction
apoptosis,
all
key
features.
Altogether,
our
findings
demonstrate
that
targeting
with
led
suppressed
as
well
reprogramming
immunosuppressive
within
prostate
bladder
immune
responses.
can
offer
an
effective
therapeutic
benefit
for
types
are
enriched
TAMs.
Journal of Clinical Investigation,
Journal Year:
2023,
Volume and Issue:
133(1)
Published: Jan. 2, 2023
Glioblastoma
(GBM)
is
the
most
aggressive
tumor
in
central
nervous
system
and
contains
a
highly
immunosuppressive
microenvironment
(TME).
Tumor-associated
macrophages
microglia
(TAMs)
are
dominant
population
of
immune
cells
GBM
TME
that
contribute
to
hallmarks,
including
immunosuppression.
The
understanding
TAMs
has
been
limited
by
lack
powerful
tools
characterize
them.
However,
recent
progress
on
single-cell
technologies
offers
an
opportunity
precisely
at
level
identify
new
TAM
subpopulations
with
specific
tumor-modulatory
functions
GBM.
In
this
Review,
we
discuss
heterogeneity
plasticity
summarize
current
TAM-targeted
therapeutic
potential
We
anticipate
use
followed
functional
studies
will
accelerate
development
novel
effective
therapeutics
for
patients.
Molecular Cancer,
Journal Year:
2022,
Volume and Issue:
21(1)
Published: Sept. 8, 2022
Abstract
Given
that
hypoxia
is
a
persistent
physiological
feature
of
many
different
solid
tumors
and
key
driver
for
cancer
malignancy,
it
thought
to
be
major
target
in
treatment
recently.
Tumor-associated
macrophages
(TAMs)
are
the
most
abundant
immune
cells
tumor
microenvironment
(TME),
which
have
large
impact
on
development
immunotherapy.
TAMs
massively
accumulate
within
hypoxic
regions.
represent
deadly
combination
because
has
been
suggested
induce
pro-tumorigenic
macrophage
phenotype.
Hypoxia
not
only
directly
affects
polarization,
but
also
an
indirect
effect
by
altering
communication
between
macrophages.
For
example,
can
influence
expression
chemokines
exosomes,
both
profound
impacts
recipient
cells.
Recently,
demonstrated
intricate
interaction
TME
relevant
poor
prognosis
increased
malignancy.
However,
there
no
comprehensive
literature
reviews
molecular
mechanisms
underlying
hypoxia-mediated
TAMs.
Therefore,
this
review
aim
collect
all
recently
available
data
topic
provide
insights
developing
novel
therapeutic
strategies
reducing
effects
hypoxia.
International Journal of Biological Sciences,
Journal Year:
2022,
Volume and Issue:
18(16), P. 6210 - 6225
Published: Jan. 1, 2022
Emerging
evidence
suggests
that
metabolic
adaptation
is
a
vital
hallmark
and
prerequisite
for
macrophage
phenotype
transition.Pyruvate
kinase
M2
(PKM2)
an
essential
molecular
determinant
of
adaptions
in
pro-inflammatory
macrophages.Post-translational
modifications
play
central
role
the
regulation
PKM2.However,
doubt
remains
on
whether
lactylation
PKM2
exists
how
modulates
function
PKM2.For
first
time,
our
study
reports
lactate
inhibits
Warburg
effect
by
activating
PKM2,
promoting
transition
macrophages
towards
reparative
phenotype.We
identify
as
substrate
confirm
occurs
mainly
at
K62
site.We
find
increases
level
which
its
tetramer-to-dimer
transition,
pyruvate
activity
reducing
nuclear
distribution.In
short,
novel
post-translational
modification
type
clarifies
potential
regulating
inflammatory
macrophages.
Nature reviews. Cancer,
Journal Year:
2023,
Volume and Issue:
23(3), P. 156 - 172
Published: Jan. 19, 2023
Few
metabolites
can
claim
a
more
central
and
versatile
role
in
cell
metabolism
than
acetyl
coenzyme
A
(acetyl-CoA).
Acetyl-CoA
is
produced
during
nutrient
catabolism
to
fuel
the
tricarboxylic
acid
cycle
essential
building
block
for
fatty
isoprenoid
biosynthesis.
It
also
functions
as
signalling
metabolite
substrate
lysine
acetylation
reactions,
enabling
modulation
of
protein
response
acetyl-CoA
availability.
Recent
years
have
seen
exciting
advances
our
understanding
normal
physiology
cancer,
buoyed
by
new
mouse
models,
vivo
stable-isotope
tracing
approaches
improved
methods
measuring
acetyl-CoA,
including
specific
subcellular
compartments.
Efforts
target
metabolic
enzymes
are
advancing,
with
one
therapeutic
agent
targeting
synthesis
receiving
approval
from
US
Food
Drug
Administration.
In
this
Review,
we
give
an
overview
regulation
cancer
relevance
major
pathways
which
participates.
We
further
discuss
recent
tissues
tumours
potential
these
therapeutically.
conclude
commentary
on
emerging
nodes
that
may
impact
biology.
Cellular and Molecular Immunology,
Journal Year:
2023,
Volume and Issue:
20(9), P. 983 - 992
Published: July 10, 2023
Abstract
Macrophages
are
critical
regulators
of
tissue
homeostasis
but
also
abundant
in
the
tumor
microenvironment
(TME).
In
both
primary
tumors
and
metastases,
such
tumor-associated
macrophages
(TAMs)
seem
to
support
development.
While
we
know
that
TAMs
dominant
immune
cells
TME,
their
vast
heterogeneity
associated
functions
only
just
being
unraveled.
this
review,
outline
various
known
TAM
populations
found
thus
far
delineate
specialized
roles
with
main
stages
cancer
progression.
We
discuss
how
may
prime
premetastatic
niche
enable
growth
a
metastasis
then
subsequent
metastasis-associated
can
secondary
growth.
Finally,
speculate
on
challenges
remain
be
overcome
research.
Clinical Cancer Research,
Journal Year:
2023,
Volume and Issue:
29(10), P. 1952 - 1968
Published: March 2, 2023
Phosphatase
and
tensin
homolog
(PTEN)
loss
of
function
occurs
in
approximately
50%
patients
with
metastatic
castrate-resistant
prostate
cancer
(mCRPC),
is
associated
poor
prognosis
responsiveness
to
standard-of-care
therapies
immune
checkpoint
inhibitors.
While
PTEN
hyperactivates
PI3K
signaling,
combinatorial
PI3K/AKT
pathway
androgen
deprivation
therapy
(ADT)
has
demonstrated
limited
anticancer
efficacy
clinical
trials.
Here,
we
aimed
elucidate
mechanism(s)
resistance
ADT/PI3K-AKT
axis
blockade,
develop
rational
strategies
effectively
treat
this
molecular
subset
mCRPC.Prostate-specific
PTEN/p53-deficient
genetically
engineered
mice
(GEM)
established
150-200
mm3
tumors,
as
assessed
by
ultrasound,
were
treated
either
ADT
(degarelix),
inhibitor
(copanlisib),
or
anti-PD-1
antibody
(aPD-1),
single
agents
their
combinations,
tumors
monitored
MRI
harvested
for
immune,
transcriptomic,
proteomic
profiling,
ex
vivo
co-culture
studies.
Single-cell
RNA
sequencing
on
human
mCRPC
samples
was
performed
using
10X
Genomics
platform.Coclinical
trials
GEM
revealed
that
recruitment
PD-1-expressing
tumor-associated
macrophages
(TAM)
thwarts
ADT/PI3Ki
combination-induced
tumor
control.
The
addition
aPD-1
combination
led
TAM-dependent
3-fold
increase
responses.
Mechanistically,
decreased
lactate
production
from
PI3Ki-treated
cells
suppressed
histone
lactylation
within
TAM,
resulting
phagocytic
activation,
which
augmented
ADT/aPD-1
treatment
abrogated
feedback
activation
Wnt/β-catenin
pathway.
RNA-sequencing
analysis
patient
biopsy
a
direct
correlation
between
high
glycolytic
activity
TAM
phagocytosis
suppression.Immunometabolic
reverse
PD-1-mediated
immunosuppression,
ADT,
warrant
further
investigation
PTEN-deficient
mCRPC.