Cancer Science,
Journal Year:
2023,
Volume and Issue:
114(6), P. 2609 - 2621
Published: Feb. 28, 2023
Glioblastomas
are
highly
heterogeneous
brain
tumors.
Despite
the
availability
of
standard
treatment
for
glioblastoma
multiforme
(GBM),
i.e.,
Stupp
protocol,
which
involves
surgical
resection
followed
by
radiotherapy
and
chemotherapy,
remains
refractory
to
recurrence
is
inevitable.
Moreover,
biology
recurrent
unclear.
Increasing
evidence
has
shown
that
intratumoral
heterogeneity
tumor
microenvironment
contribute
therapeutic
resistance.
However,
interaction
between
intracellular
drug
resistance
in
GBMs
controversial.
The
aim
this
study
was
map
transcriptome
landscape
cancer
cells
drug-resistant
at
a
single-cell
resolution
further
explore
mechanism
GBMs.
We
analyzed
six
tissue
samples
from
three
patients
with
primary
GBM
developed
after
protocol
using
RNA
sequencing.
Using
unbiased
clustering,
nine
major
cell
clusters
were
identified.
Upregulation
expression
stemness-related
cell-cycle-related
genes
observed
cells.
Compared
initial
tissues,
tissues
showed
decreased
proportion
microglia,
consistent
previous
reports.
Finally,
vascular
endothelial
growth
factor
A
blood-brain
barrier
permeability
high,
O6
-methylguanine
DNA
methyltransferase-related
signaling
pathway
activated
GBM.
Our
results
delineate
glioblastoma,
heterogeneity,
microenvironment,
drug-resistance
mechanisms,
providing
new
insights
into
strategies
glioblastomas.
Science Advances,
Journal Year:
2022,
Volume and Issue:
8(27)
Published: July 8, 2022
Genomic
alteration
can
reshape
tumor
microenvironment
to
drive
malignancy.
However,
how
PTEN
deficiency
influences
microenvironment-mediated
cell-cell
interactions
in
glioblastoma
(GBM)
remains
unclear.
Here,
we
show
that
induces
a
symbiotic
glioma-M2
macrophage
interaction
support
glioma
progression.
Mechanistically,
-deficient
GBM
cells
secrete
high
levels
of
galectin-9
(Gal-9)
via
the
AKT-GSK3β-IRF1
pathway.
The
secreted
Gal-9
drives
M2
polarization
by
activating
its
receptor
Tim-3
and
downstream
pathways
macrophages.
These
macrophages,
turn,
VEGFA
stimulate
angiogenesis
growth.
Furthermore,
enhanced
Gal-9/Tim-3
expression
predicts
poor
outcome
patients.
In
models,
blockade
signaling
inhibits
suppresses
Moreover,
α-lactose
attenuates
down-regulating
macrophage-derived
VEGFA,
providing
novel
antivascularization
strategy.
Therefore,
our
study
suggests
is
effective
impair
progression
inhibiting
polarization,
specifically
for
-null
GBM.
Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: Jan. 27, 2023
Abstract
Glioblastoma
(GBM)
is
the
most
common
primary
malignant
brain
tumor
in
adults,
yet
it
remains
refractory
to
systemic
therapy.
Elimination
of
senescent
cells
has
emerged
as
a
promising
new
treatment
approach
against
cancer.
Here,
we
investigated
contribution
GBM
progression.
Senescent
are
identified
patient
and
mouse
GBMs.
Partial
removal
p16
Ink4a
-expressing
cells,
which
make
up
less
than
7
%
tumor,
modifies
ecosystem
improves
survival
GBM-bearing
female
mice.
By
combining
single
cell
bulk
RNA
sequencing,
immunohistochemistry
genetic
knockdowns,
identify
NRF2
transcription
factor
determinant
phenotype.
Remarkably,
our
transcriptional
signature
underlying
mechanisms
senescence
conserved
GBMs,
whom
higher
scores
correlate
with
shorter
times.
These
findings
suggest
that
senolytic
drug
therapy
may
be
beneficial
adjuvant
for
patients
GBM.
Cancer Discovery,
Journal Year:
2022,
Volume and Issue:
12(12), P. 2820 - 2837
Published: Sept. 19, 2022
Abstract
Isocitrate
dehydrogenase
(IDH)
wild-type
glioblastoma
(GBM)
has
a
dismal
prognosis.
A
better
understanding
of
tumor
evolution
holds
the
key
to
developing
more
effective
treatment.
Here
we
study
GBM's
natural
evolutionary
trajectory
by
using
rare
multifocal
samples.
We
sequenced
61,062
single
cells
from
eight
IDH
primary
GBMs
and
defined
signature
(NES)
tumor.
show
that
NES
significantly
associates
with
activation
transcription
factors
regulate
brain
development,
including
MYBL2
FOSL2.
Hypoxia
is
involved
in
inducing
transition
potentially
via
HIF1A–FOSL2
axis.
High-NES
could
recruit
polarize
bone
marrow–derived
macrophages
through
FOSL2–ANXA1–FPR1/3
These
polarized
can
efficiently
suppress
T-cell
activity
accelerate
cells.
Moreover,
upregulate
CCL2
induce
cell
migration.
Significance:
GBM
progression
be
induced
hypoxia
Tumor-derived
ANXA1
associated
recruitment
polarization
immunoenvironment.
The
promote
This
article
highlighted
In
Issue
feature,
p.
2711
Nature Communications,
Journal Year:
2023,
Volume and Issue:
14(1)
Published: July 11, 2023
Abstract
Intra-tumoral
heterogeneity
and
cell-state
plasticity
are
key
drivers
for
the
therapeutic
resistance
of
glioblastoma.
Here,
we
investigate
association
between
spatial
cellular
organization
glioblastoma
prognosis.
Leveraging
single-cell
RNA-seq
transcriptomics
data,
develop
a
deep
learning
model
to
predict
transcriptional
subtypes
cells
from
histology
images.
Employing
this
model,
phenotypically
analyze
40
million
tissue
spots
410
patients
identify
consistent
associations
tumor
architecture
prognosis
across
two
independent
cohorts.
Patients
with
poor
exhibit
higher
proportions
expressing
hypoxia-induced
program.
Furthermore,
clustering
pattern
astrocyte-like
is
associated
worse
prognosis,
while
dispersion
connection
astrocytes
other
correlate
decreased
risk.
To
validate
these
results,
separate
that
utilizes
images
Applying
data
reveal
survival-associated
regional
gene
expression
programs.
Overall,
our
study
presents
scalable
approach
unravel
establishes
critical
clinical
outcomes.
Cancer Discovery,
Journal Year:
2023,
Volume and Issue:
13(4), P. 974 - 1001
Published: Jan. 17, 2023
Glioblastoma
(GBM)
constitutes
the
most
lethal
primary
brain
tumor
for
which
immunotherapy
has
provided
limited
benefit.
The
unique
immune
landscape
is
reflected
in
a
complex
microenvironment
(TIME)
GBM.
Here,
single-cell
sequencing
of
GBM
TIME
revealed
that
microglia
were
under
severe
oxidative
stress,
induced
nuclear
receptor
subfamily
4
group
A
member
2
(NR4A2)-dependent
transcriptional
activity
microglia.
Heterozygous
Nr4a2
(Nr4a2+/-)
or
CX3CR1+
myeloid
cell-specific
(Nr4a2fl/flCx3cr1Cre)
genetic
targeting
reshaped
plasticity
vivo
by
reducing
alternatively
activated
and
enhancing
antigen
presentation
capacity
CD8+
T
cells
In
microglia,
NR4A2
squalene
monooxygenase
(SQLE)
to
dysregulate
cholesterol
homeostasis.
Pharmacologic
inhibition
attenuated
protumorigenic
TIME,
SQLE
enhanced
therapeutic
efficacy
immune-checkpoint
blockade
vivo.
Collectively,
stress
promotes
growth
through
NR4A2-SQLE
informing
novel
therapy
paradigms
cancer.
Metabolic
reprogramming
informs
synergistic
vulnerabilities
this
immunologically
cold
tumor.
This
article
highlighted
Issue
feature,
p.
799.
Nature Reviews Genetics,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Aug. 12, 2024
The
DNA
methylation
field
has
matured
from
a
phase
of
discovery
and
genomic
characterization
to
one
seeking
deeper
functional
understanding
how
this
modification
contributes
development,
ageing
disease.
In
particular,
the
past
decade
seen
many
exciting
mechanistic
discoveries
that
have
substantially
expanded
our
appreciation
for
generic,
evolutionarily
ancient
can
be
incorporated
into
robust
epigenetic
codes.
Here,
we
summarize
current
distinct
landscapes
emerge
over
mammalian
lifespan
discuss
they
interact
with
other
regulatory
layers
support
diverse
functions.
We
then
review
rising
interest
in
alternative
patterns
found
during
senescence
somatic
transition
cancer.
Alongside
advancements
single-cell
long-read
sequencing
technologies,
collective
insights
made
across
these
fields
offer
new
opportunities
connect
biochemical
genetic
features
cell
physiology,
developmental
potential
phenotype.
Review,
Smith
et
al.
describe
development
within
key
disease
states,
as
well
different
methyltransferases
interface
histone
modifications
proteins
create
maintain
them.