Background:
Pancreatic
ductal
adenocarcinoma
(PDAC)
is
a
devastating
disease
with
limited
number
of
known
driver
mutations
but
considerable
cancer
cell
heterogeneity.
Phosphoproteomics
provides
direct
read-out
aberrant
signalling
and
the
resultant
clinically
relevant
phenotype.
Methods:
Mass
spectrometry
(MS)-based
proteomics
phosphoproteomics
were
applied
to
42
PDAC
tumors.
To
this
end,
protein
lysates
subjected
tryptic
digestion
sequential
phosphopeptide
capture
using
pY
antibodies
IMAC
beads
followed
by
nanoLC-MS/MS
database
searching.
Functional
data
mining
was
performed
Integrative
iNferred
Kinase
Activity
(INKA)
scoring,
ssGSEA
PTM-SEA.
subtypes
investigated
consensus
clustering.
The
collected
correlated
genomic
patient
survival
outcomes.
Findings:
Data
encompassed
over
19936
pS/T
(in
5412
phosphoproteins)
1208
sites
501
total
3756
proteins.
Proteome
identified
three
distinct
tumor
intrinsic
stromal
features.
Subsequently,
phospho-subtypes
apparent:
two
tumour-intrinsic
(Phos1/2)
one
(Phos3),
resembling
molecular
subtypes.
Phos
displayed
differential
phosphorylation
signals
kinase
activity,
such
as
FGR
GSK3
activation
in
Phos1,
SRC
family
EPHA2
Phos2,
EGFR,
INSR,
MET,
ABL1,
HIPK1,
JAK
PRKCD
Phos3.
activity
analysis
an
external
cohort
supported
our
findings
underscored
importance
PI3K/AKT
ERK
pathways,
among
other.
Interestingly,
unfavorable
prognosis
higher
RTK,
MAPK
CDK
high
proliferation,
whereas
long
associated
MYLK,
ILK,
PTK6
previously
unknown.
Interpretation:
Subtype-associated
profiles
can
guide
therapeutic
combination
approaches
tumour
stroma
enriched
tissues,
emphasize
critical
role
parallel
pathways.
In
addition,
profiling
identifies
potential
markers
prognostic
significance.Funding:
This
project
Dutch
Cancer
Society
(KWF
Kankerbestrijding,
grant
KWF2016-1
/
10212
C.R.J.,
M.F.B.
E.G.).
Center
Amsterdam
Netherlands
Organisation
for
Scientific
Research
(NWO-Middelgroot
91116017)
are
acknowledged
support
mass
infrastructure
Surfsara
computing
(reference
e-infra180166).Declaration
Interest:
has
received
research
funding
from
Celgene,
Frame
Therapeutics,
Lead
Pharma.
He
acted
consultant
Servier.
Ethical
Approval:
Tumor
tissue
specimens,
snap-frozen
liquid
nitrogen
stored
at
-80°C,
retrospectively
archive
Department
Pathology
(approved
Committee
Review
Biobanks,
CTB.2015-081)
purpose
phosphoproteomic
research.
Retrospective
collection
conducted
accordance
ethical
guidelines
UMC
Code,
based
on
'Code
conduct
Health
Research'
(Dutch
Regulation
Research).
The Journal of Gene Medicine,
Journal Year:
2023,
Volume and Issue:
26(1)
Published: Sept. 11, 2023
Abstract
Background
Cytotoxic
T‐lymphocyte
(CTL)‐mediated
therapy
has
become
the
central
theme
of
cancer
immunotherapy.
The
present
study
emphasized
role
CTLs
in
acute
myeloid
leukemia
(AML)
and
aimed
to
understand
cytogenetic
markers
monitoring
AML
prognostic
outcomes
clinical
treatment
responses.
Methods
Seurat
was
employed
analyze
single‐cell
RNA
sequencing
data
GSE116256.
CellChat
used
detect
cell–cell
interactions
determine
CTLs.
marker
genes
were
extracted
randomForestSRC
construct
a
random
forest
model.
prognosis,
immune
checkpoint
expression,
cell
infiltration,
immunotherapy
response
drug
sensitivity
patients
evaluated
according
Results
Seven
types
cellular
components
identified
GSE116256,
radiated
most
with
other
types.
Random
analysis
screened
out
six
for
construction
risk
score
calculated
model
positively
correlated
score,
expression
multiple
checkpoints
effect
pathway.
rate
significantly
higher
more
sensitive
14
drugs
high‐risk
samples
than
low‐risk
samples,
whereas
showed
drugs.
Conclusions
communication
established
regression
based
on
its
markers,
which
helps
stratify
prognosis
AML,
promotes
understanding
phenotype
may
also
guide
choice
patients,
contributed
stratification
promoted
selection
AML.
Molecular Oncology,
Journal Year:
2024,
Volume and Issue:
18(8), P. 2020 - 2041
Published: April 22, 2024
Pancreatic
ductal
adenocarcinoma
(PDAC)
is
a
devastating
disease
with
limited
number
of
known
driver
mutations
but
considerable
cancer
cell
heterogeneity.
Phosphoproteomics
provides
direct
read-out
aberrant
signaling
and
the
resultant
clinically
relevant
phenotype.
Mass
spectrometry
(MS)-based
proteomics
phosphoproteomics
were
applied
to
42
PDAC
tumors.
Data
encompassed
over
19
936
phosphoserine
or
phosphothreonine
(pS/T;
in
5412
phosphoproteins)
1208
phosphotyrosine
(pY;
501
sites
total
3756
proteins.
Proteome
data
identified
three
distinct
subtypes
tumor
intrinsic
stromal
features.
Subsequently,
phospho-subtypes
apparent:
two
(Phos1/2)
one
(Phos3),
resembling
molecular
subtypes.
Kinase
activity
was
analyzed
by
Integrative
iNferred
Activity
(INKA)
scoring.
Phospho-subtypes
displayed
differential
phosphorylation
signals
kinase
activity,
such
as
FGR
GSK3
activation
Phos1,
SRC
family
EPHA2
Phos2,
EGFR,
INSR,
MET,
ABL1,
HIPK1,
JAK,
PRKCD
Phos3.
analysis
an
external
cohort
supported
our
findings
underscored
importance
PI3K/AKT
ERK
pathways,
among
others.
Interestingly,
unfavorable
patient
prognosis
correlated
higher
RTK,
PAK2,
STK10,
CDK7
high
proliferation,
whereas
long
survival
associated
MYLK
PTK6
which
previously
unknown.
Subtype-associated
profiles
can
guide
therapeutic
combination
approaches
stroma-enriched
tissues,
emphasize
critical
role
parallel
pathways.
In
addition,
profiling
identifies
potential
markers
prognostic
significance.
Journal of Proteome Research,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Nov. 18, 2024
The
study
of
circulating
peptides
in
the
blood
offers
significant
opportunities
for
diagnosing,
stratifying,
and
managing
various
diseases.
With
recent
technological
advances
ongoing
need
to
understand
complex
diseases
such
as
acute
leukemias
(AL),
peptidomic
analysis
peripheral
blood,
especially
serum
plasma,
has
become
increasingly
important
studying
human
biology
pathophysiology.
Here,
we
provide
insights
perspectives
on
developments
potential
clinical
applications
using
widely
used
methods.
We
discuss
examples
where
peptidomics
or
plasma
contributed
understanding
AL.
Specifically,
highlight
scarcity
studies
applied
AL
emphasize
importance
exploring
this
area,
few
published
present
promising
results
that
can
significantly
contribute
precision
medicine.
Expert Review of Proteomics,
Journal Year:
2024,
Volume and Issue:
unknown, P. 1 - 14
Published: Nov. 22, 2024
Acute
myeloid
leukemia
(AML)
is
an
aggressive
and
poor-prognosis
blood
cancer.
Despite
a
low
mutation
burden
compared
to
other
cancers,
AML
heterogenous
identifying
robust
therapeutic
targets
has
been
difficult.
Genomic
profiling
greatly
advanced
our
understanding
of
AML,
revealed
for
therapy.
However,
only
50%
patients
have
gene
mutations
that
are
currently
druggable,
relapse
rates
remain
high.
The
addition
proteomic
emerging
address
these
challenges.
Background:
Pancreatic
ductal
adenocarcinoma
(PDAC)
is
a
devastating
disease
with
limited
number
of
known
driver
mutations
but
considerable
cancer
cell
heterogeneity.
Phosphoproteomics
provides
direct
read-out
aberrant
signalling
and
the
resultant
clinically
relevant
phenotype.
Methods:
Mass
spectrometry
(MS)-based
proteomics
phosphoproteomics
were
applied
to
42
PDAC
tumors.
To
this
end,
protein
lysates
subjected
tryptic
digestion
sequential
phosphopeptide
capture
using
pY
antibodies
IMAC
beads
followed
by
nanoLC-MS/MS
database
searching.
Functional
data
mining
was
performed
Integrative
iNferred
Kinase
Activity
(INKA)
scoring,
ssGSEA
PTM-SEA.
subtypes
investigated
consensus
clustering.
The
collected
correlated
genomic
patient
survival
outcomes.
Findings:
Data
encompassed
over
19936
pS/T
(in
5412
phosphoproteins)
1208
sites
501
total
3756
proteins.
Proteome
identified
three
distinct
tumor
intrinsic
stromal
features.
Subsequently,
phospho-subtypes
apparent:
two
tumour-intrinsic
(Phos1/2)
one
(Phos3),
resembling
molecular
subtypes.
Phos
displayed
differential
phosphorylation
signals
kinase
activity,
such
as
FGR
GSK3
activation
in
Phos1,
SRC
family
EPHA2
Phos2,
EGFR,
INSR,
MET,
ABL1,
HIPK1,
JAK
PRKCD
Phos3.
activity
analysis
an
external
cohort
supported
our
findings
underscored
importance
PI3K/AKT
ERK
pathways,
among
other.
Interestingly,
unfavorable
prognosis
higher
RTK,
MAPK
CDK
high
proliferation,
whereas
long
associated
MYLK,
ILK,
PTK6
previously
unknown.
Interpretation:
Subtype-associated
profiles
can
guide
therapeutic
combination
approaches
tumour
stroma
enriched
tissues,
emphasize
critical
role
parallel
pathways.
In
addition,
profiling
identifies
potential
markers
prognostic
significance.Funding:
This
project
Dutch
Cancer
Society
(KWF
Kankerbestrijding,
grant
KWF2016-1
/
10212
C.R.J.,
M.F.B.
E.G.).
Center
Amsterdam
Netherlands
Organisation
for
Scientific
Research
(NWO-Middelgroot
91116017)
are
acknowledged
support
mass
infrastructure
Surfsara
computing
(reference
e-infra180166).Declaration
Interest:
has
received
research
funding
from
Celgene,
Frame
Therapeutics,
Lead
Pharma.
He
acted
consultant
Servier.
Ethical
Approval:
Tumor
tissue
specimens,
snap-frozen
liquid
nitrogen
stored
at
-80°C,
retrospectively
archive
Department
Pathology
(approved
Committee
Review
Biobanks,
CTB.2015-081)
purpose
phosphoproteomic
research.
Retrospective
collection
conducted
accordance
ethical
guidelines
UMC
Code,
based
on
'Code
conduct
Health
Research'
(Dutch
Regulation
Research).