Journal of Hematology & Oncology,
Journal Year:
2022,
Volume and Issue:
15(1)
Published: June 3, 2022
Hypoxia,
a
common
feature
of
the
tumor
microenvironment
in
various
types
cancers,
weakens
cytotoxic
T
cell
function
and
causes
recruitment
regulatory
cells,
thereby
reducing
tumoral
immunogenicity.
Studies
have
demonstrated
that
hypoxia
hypoxia-inducible
factors
(HIFs)
1
2
alpha
(HIF1A
HIF2A)
are
involved
immune
escape.
Under
hypoxia,
activation
HIF1A
induces
series
signaling
events,
including
through
programmed
death
receptor-1/programmed
ligand-1.
Moreover,
triggers
shedding
complex
class
I
chain-associated
molecules
nitric
oxide
impairment
to
disrupt
surveillance
by
natural
killer
cells.
The
HIF-1-galactose-3-O-sulfotransferase
1-sulfatide
axis
enhances
escape
via
increased
cell-platelet
binding.
HIF2A
upregulates
stem
factor
expression
recruit
tumor-infiltrating
mast
cells
increase
levels
cytokines
interleukin-10
transforming
growth
factor-β,
resulting
an
immunosuppressive
microenvironment.
Additionally,
tumor-associated
long
noncoding
RNAs
suppresses
function,
enabling
Overall,
elucidating
underlying
mechanisms
which
HIFs
promote
evasion
will
allow
for
targeting
HIF
treatment.
This
review
discusses
current
knowledge
how
facilitate
escape,
with
evidence
date
implicating
as
molecular
target
such
provides
further
insight
into
mechanism
strategies
immunotherapy
suggested.
Molecular Cancer,
Journal Year:
2019,
Volume and Issue:
18(1)
Published: Oct. 23, 2019
Abstract
Programmed
death
ligand
1
(PD-L1),
a
type
I
transmembrane
protein,
binds
to
its
receptor
PD-1
suppress
the
activation
of
T
cells,
thereby
maintaining
immunological
homeostasis.
In
contrast,
tumor
cells
highly
express
PD-L1,
which
expressed
on
activated
leading
immune
escape.
Anti-PD-1/PD-L1
checkpoint
therapy
blocks
binding
PD-1/PD-L1
reinvigorate
exhausted
inhibiting
growth.
Exosomes
are
biologically
active
lipid-bilayer
nanovesicles
secreted
by
various
cell
types
that
mediate
intercellular
signal
communication.
Numerous
studies
have
shown
able
promote
epithelial-mesenchymal
transition,
angiogenesis,
and
escape
releasing
exosomes.
Recent
imply
tumor-derived
exosomes
could
carry
PD-L1
in
same
membrane
topology
as
surface,
resisting
therapy.
this
review,
we
mainly
discuss
role
regulation
progression
potential
resistance
mechanism
immunotherapy
via
exosomal
PD-L1.
addition,
propose
may
be
target
overcome
anti-PD-1/PD-L1
antibody
Signal Transduction and Targeted Therapy,
Journal Year:
2024,
Volume and Issue:
9(1)
Published: Feb. 5, 2024
Abstract
Extracellular
vesicles
(EVs)
are
nano-sized,
membranous
structures
secreted
into
the
extracellular
space.
They
exhibit
diverse
sizes,
contents,
and
surface
markers
ubiquitously
released
from
cells
under
normal
pathological
conditions.
Human
serum
is
a
rich
source
of
these
EVs,
though
their
isolation
proteins
non-EV
lipid
particles
poses
challenges.
These
transport
various
cellular
components
such
as
proteins,
mRNAs,
miRNAs,
DNA,
lipids
across
distances,
influencing
numerous
physiological
events,
including
those
within
tumor
microenvironment
(TME).
Their
pivotal
roles
in
communication
make
EVs
promising
candidates
for
therapeutic
agents,
drug
delivery
systems,
disease
biomarkers.
Especially
cancer
diagnostics,
EV
detection
can
pave
way
early
identification
offers
potential
diagnostic
Moreover,
subtypes
emerging
targeted
tools,
highlighting
clinical
significance.
The
need
non-invasive
biomarkers
to
monitor
biological
processes
purposes
remains
unfulfilled.
Tapping
unique
composition
could
unlock
advanced
avenues
future.
In
this
review,
we
discuss
detail
conditions,
cancers
(encompassing
head
neck,
lung,
gastric,
breast,
hepatocellular
carcinoma),
neurodegenerative
disorders,
diabetes,
viral
infections,
autoimmune
renal
diseases,
emphasizing
advancements
molecular
diagnostics
delivery.
Journal of Hematology & Oncology,
Journal Year:
2022,
Volume and Issue:
15(1)
Published: June 3, 2022
Hypoxia,
a
common
feature
of
the
tumor
microenvironment
in
various
types
cancers,
weakens
cytotoxic
T
cell
function
and
causes
recruitment
regulatory
cells,
thereby
reducing
tumoral
immunogenicity.
Studies
have
demonstrated
that
hypoxia
hypoxia-inducible
factors
(HIFs)
1
2
alpha
(HIF1A
HIF2A)
are
involved
immune
escape.
Under
hypoxia,
activation
HIF1A
induces
series
signaling
events,
including
through
programmed
death
receptor-1/programmed
ligand-1.
Moreover,
triggers
shedding
complex
class
I
chain-associated
molecules
nitric
oxide
impairment
to
disrupt
surveillance
by
natural
killer
cells.
The
HIF-1-galactose-3-O-sulfotransferase
1-sulfatide
axis
enhances
escape
via
increased
cell-platelet
binding.
HIF2A
upregulates
stem
factor
expression
recruit
tumor-infiltrating
mast
cells
increase
levels
cytokines
interleukin-10
transforming
growth
factor-β,
resulting
an
immunosuppressive
microenvironment.
Additionally,
tumor-associated
long
noncoding
RNAs
suppresses
function,
enabling
Overall,
elucidating
underlying
mechanisms
which
HIFs
promote
evasion
will
allow
for
targeting
HIF
treatment.
This
review
discusses
current
knowledge
how
facilitate
escape,
with
evidence
date
implicating
as
molecular
target
such
provides
further
insight
into
mechanism
strategies
immunotherapy
suggested.