Drug Safety,
Journal Year:
2023,
Volume and Issue:
46(10), P. 927 - 949
Published: Aug. 8, 2023
Trastuzumab
deruxtecan
(T-DXd)—an
antibody–drug
conjugate
targeting
the
human
epidermal
growth
factor
receptor
2
(HER2)—improved
outcomes
of
patients
with
HER2-positive
and
HER2-low
metastatic
breast
cancer.
Guidance
on
monitoring
managing
T-DXd–related
adverse
events
(AEs)
is
an
emerging
unmet
need
as
translating
clinical
trial
experience
into
real-world
practice
may
be
difficult
due
to
practical
cultural
considerations
differences
in
health
care
infrastructure.
Thus,
13
experts
including
oncologists,
pulmonologists
a
radiologist
from
Asia-Pacific
region
gathered
provide
recommendations
for
AE
management
by
using
latest
evidence
DESTINY-Breast
trials,
our
own
loco-regional
considerations.
While
subgroup
analysis
Asian
(excluding
Japanese)
versus
overall
population
DESTINY-Breast03
uncovered
no
major
profile,
we
concluded
that
proactive
are
essential
maximising
benefits
T-DXd.
As
interstitial
lung
disease
(ILD)/pneumonitis
serious
AE,
should
undergo
regular
computed
tomography
scans,
but
frequency
have
account
median
time
ILD/pneumonitis
onset
access.
appears
highly
emetic
regimen,
prophylaxis
serotonin
antagonists
dexamethasone
(with
or
without
neurokinin-1
antagonist)
considered.
Health
professionals
vigilant
treatable
causes
fatigue,
encouraged
use
support
groups
low-intensity
exercises.
To
increase
treatment
acceptance,
made
aware
alopecia
risk
prior
starting
Detailed
AEs
discussed
further.
BMC Medicine,
Journal Year:
2022,
Volume and Issue:
20(1)
Published: March 17, 2022
Abstract
Background
HER2-low
breast
cancer
(BC)
is
currently
an
area
of
active
interest.
This
study
evaluated
the
impact
low
expression
HER2
on
survival
outcomes
in
HER2-negative
non-metastatic
(BC).
Methods
Patients
with
BC
from
6
centres
within
Asian
Breast
Cancer
Cooperative
Group
(ABCCG)
(
n
=
28,280)
were
analysed.
was
defined
as
immunohistochemistry
(IHC)
1+
or
2+
and
situ
hybridization
non-amplified
(ISH−)
HER2-zero
IHC
0.
Relapse-free
(RFS)
overall
(OS)
by
hormone
receptor
status
0,
ISH−
main
outcomes.
A
combined
TCGA-BRCA
METABRIC
cohort
1967)
also
analysed
to
explore
association
between
expression,
ERBB2
copy
number
variation
(CNV)
RFS.
Results
ABCCG
median
follow-up
6.6
years;
there
12,260
(43.4%)
16,020
(56.6%)
BC.
The
better
than
(RFS:
centre-adjusted
hazard
ratio
(HR)
0.88,
95%
CI
0.82–0.93,
P
<
0.001;
OS:
HR
0.82,
0.76–0.89,
0.001).
On
multivariable
analysis,
prognostic
0.90,
0.85–0.96,
0.002;
0.86,
0.79–0.93,
These
differences
remained
significant
receptor-positive
tumours
for
OS
receptor-negative
tumours.
Superior
observed
IHC1+
versus
0.89,
0.83–0.96,
0.85,
0.78–0.93,
No
seen
IHC2+
BCs.
In
cohorts,
CNV
independent
RFS
factor
(neutral
non-neutral
0.71,
0.59–0.86,
0.001);
no
mRNA
levels
found.
Conclusions
had
a
superior
prognosis
compared
setting,
though
absolute
modest
driven
merits
further
investigation
ESMO Open,
Journal Year:
2023,
Volume and Issue:
8(4), P. 101592 - 101592
Published: July 4, 2023
•Patients
with
HER2-low
tumours
showed
better
OS
than
those
HER2-zero
cancers
in
both
settings.•No
differences
were
found
terms
of
PFS
between
patients
and
tumours.•Patients
a
lower
rate
pCR
compared
to
cancers.
BackgroundHuman
epidermal
growth
factor
receptor
2
(HER2)-low
expression
breast
cancer
has
been
recently
identified
as
new
therapeutic
target.
However,
it
is
unclear
if
status
an
independent
impact
on
prognosis.Materials
methodsA
systematic
literature
research
was
carried
out
identify
studies
comparing
survival
outcomes
affected
by
versus
cancer.
Using
random-effects
models,
pooled
hazard
ratios
(HRs)
odds
(ORs)
95%
confidence
intervals
(CIs)
calculated
for
progression-free
(PFS)
overall
(OS)
the
metastatic
setting
well
disease-free
(DFS),
pathological
complete
response
(pCR)
early
setting.
Subgroup
analyses
hormone
(HoR)
out.
The
study
protocol
registered
PROSPERO
(n.CRD42023390777).ResultsAmong
1916
records,
42
including
1
797
175
eligible.
In
setting,
associated
significant
improved
DFS
(HR
0.86,
CI
0.79-0.92,
P
<
0.001)
0.90,
0.85-0.95,
when
status.
Improved
observed
HoR-positive
HoR-negative
populations,
while
improvement
only
subgroup.
significantly
population
(OR
0.74,
0.62-0.88,
=
subgroup
0.77,
0.65-0.90,
0.001).
0.94,
0.89-0.98,
0.008),
regardless
HoR
No
found.ConclusionsCompared
status,
appears
be
slightly
increased
advanced
settings,
expression.
seem
rates,
especially
HoR-positive.
Human
prognosis.
A
(n.CRD42023390777).
Among
found.
Compared
Clinical Cancer Research,
Journal Year:
2024,
Volume and Issue:
30(19), P. 4299 - 4309
Published: Aug. 1, 2024
Abstract
Purpose:
Elacestrant
significantly
prolonged
progression-free
survival
(PFS)
with
manageable
safety
versus
standard-of-care
(SOC)
endocrine
therapy
(ET)
in
patients
estrogen
receptor–positive
(ER+),
HER2−
metastatic
breast
cancer
and
tumors
harboring
receptor
1
(ESR1)
mutation
following
ET
plus
a
cyclin-dependent
kinase
4/6
inhibitor
(ET+CDK4/6i).
In
ESR1-mutated
tumors,
we
evaluated
the
efficacy
of
elacestrant
SOC
based
on
prior
ET+CDK4/6i
duration
clinical
subgroups
≥12
months.
Patients
Methods:
EMERALD,
an
open-label
phase
III
trial,
randomly
assigned
ER+,
who
had
received
1–2
lines
ET,
mandatory
CDK4/6i,
≤1
chemotherapy
to
(345
mg
daily)
or
(aromatase
fulvestrant).
PFS
was
assessed
across
post
hoc
exploratory
analyses
without
adjustment
for
multiple
testing.
Results:
months,
median
8.6
1.9
months
(HR,
0.41;
95%
confidence
interval,
0.26–0.63).
this
population,
(in
months)
9.1
(bone
metastases),
7.3
(liver
and/or
lung
9.0
(<3
sites),
10.8
1.8
(≥3
5.5
(PIK3
catalytic
subunit
α
mutation),
(tumor
protein
p53
gene
(HER2-low),
(ESR1D538G-mutated
tumors),
(ESR1Y537S/N-mutated
tumors).
Subgroup
consistent
overall
population.
Conclusions:
The
associated
clinically
meaningful
improvement
compared
all
HER2−,
tumors.
European Journal of Cancer,
Journal Year:
2022,
Volume and Issue:
176, P. 181 - 188
Published: Sept. 28, 2022
Half
of
HER2-negative
breast
cancers
(BC)
show
HER2-low
expression.
The
strong
efficacy
recent
anti-HER2
antibody-drug
conjugates
(ADC)
in
tumours
has
risen
the
interest
as
a
proper
BC
subtype.
Chemosensitivity
and
prognosis
this
subtype
are
not
clear
when
compared
to
HER2-0
tumours.
We
investigated
pathological
complete
response
(pCR)
disease-free
survival
(DFS)
rates
patients
receiving
neoadjuvant
chemotherapy
for
or
tumours.Data
were
collected
from
Institut
Paoli-Calmettes
database.
defined
by
HER2
IHC
score
1+
2+
with
negative
FISH,
0.
Clinicopathological
characteristics,
pCR
(defined
[ypT0/ypTis]
[pN0sn
ypN0])
DFS
between
two
cohorts.From
Jan/2005
Jun/2021,
1111
evaluable.
incidence
was
41%,
including
63%
hormone
receptor
(HR)-positive
37%
HR-negative
(p
<
0.001).
In
whole
population,
rate
lower
(23%)
versus
(30%)
=
0.013),
but
association
lost
multivariate
analysis.
HR-positive
patients,
negatively
impacted
(10%
vs.
16%,
p
0.046),
HR-negatives
(46%
42%),
result
maintained
No
correlation
existed
HER2-status.HER2-low
is
associated
HR
positivity.
status
did
impact
whereas
patients.
Cancers,
Journal Year:
2022,
Volume and Issue:
15(1), P. 126 - 126
Published: Dec. 25, 2022
HER2-low
breast
cancer
(BC)
is
a
newly
defined
subset
of
HER2-negative
BC
that
has
HER2
immunohistochemical
(IHC)
score
1+
or
2+/in
situ
hybridization
(ISH)
negative
phenotype.
Recent
clinical
trials
have
demonstrated
significant
benefits
novel
directing
antibody-drug
conjugates
(ADCs)
in
treating
this
group
tumors.
Trastuzumab-deruxtecan
(T-Dxd),
HER2-directing
ADC
was
recently
approved
by
the
U.S.
Food
and
Drug
Administration
as
first
targeted
therapy
to
treat
BC.
However,
still
not
well
characterized
clinically
pathologically.
This
review
aims
update
current
biological,
pathological
landscape
based
on
English
literature
published
past
two
years
propose
future
directions
management,
pathology
practice,
translational
research
We
hope
it
would
help
better
understand
tumor
biology
efforts
for
identifying
recognized
targetable
Therapeutic Advances in Medical Oncology,
Journal Year:
2023,
Volume and Issue:
15
Published: Jan. 1, 2023
Approximately
half
of
breast
cancers
(BCs),
historically
categorized
as
human
epidermal
growth
factor
receptor
2
(HER2)-negative,
have
low
expression
HER2
defined
an
immunohistochemical
(IHC)
score
1+
or
2+
with
negative
European Journal of Cancer,
Journal Year:
2023,
Volume and Issue:
188, P. 152 - 160
Published: May 6, 2023
Anti-HER2
antibody-drug
conjugates
(ADCs)
have
shown
important
efficacy
in
HER2-low
metastatic
breast
cancer
(mBC).
Criteria
for
receiving
ADCs
are
based
on
a
single
assay
the
primary
tumour
or
small
biopsy.
We
assessed
intra-patient
inter-metastasis
heterogeneity
of
status
HER2-negative
mBC.We
included
samples
10
patients
(7
ER-positive
and
3
ER-negative)
donated
context
our
post-mortem
tissue
donation
program
UPTIDER.
Excisional
biopsies
257
metastases
8
tumours
underwent
central
HER2
immunohistochemistry
(IHC),
alongside
41
pre-mortem
samples.
They
were
classified
as
HER2-zero,
(HER2-1+
HER2-2+,
situ
hybridisation
[ISH]
negative)
HER2-positive
(HER2-3+
ISH-positive)
following
ASCO/CAP
guidelines
2018.
HER2-zero
was
further
subdivided
into
HER2-undetected
(no
staining)
HER2-ultralow
(faint
staining
≤10%
cells).Median
interval
2.5
h.
In
8/10
patients,
co-existed,
with
proportion
lesions
ranging
from
5%
to
89%.
A
total
32%
currently
HER2-ultralow.
Intra-organ
HER2-scores
observed
liver
3/6
patients.
Patients
disease
had
higher
compared
ER-negative
(46%
versus
8%,
respectively).
At
metastasis
level,
percentages
ER-expressing
cells
-ultralow
metastases.Important
exists.
This
questions
validity
its
current
form
theranostic
marker.