Proteomic analysis of chick embryonic heart in experimental hypoxia
Developmental Biology,
Год журнала:
2025,
Номер
unknown
Опубликована: Фев. 1, 2025
Язык: Английский
Narrow Margins: Aerobic Performance and Temperature Tolerance of Coral Reef Fishes Facing Extreme Thermal Variability
Global Change Biology,
Год журнала:
2025,
Номер
31(3)
Опубликована: Март 1, 2025
Climate
change
is
driving
rising
average
sea
temperatures
and
the
intensification
of
thermal
variability.
Tropical
coral
reef
fishes
have
evolved
under
thermally
stable
conditions
to
function
optimally
within
a
narrow
temperature
range,
with
many
currently
living
close
their
upper
limits.
However,
recent
work
has
demonstrated
that
some
species
possess
additional
capacity,
such
as
reductions
in
basal
metabolic
rates
(i.e.,
'plastic
floors'),
compensate
for
acute
effects
challenges
when
assessed
over
multigenerational
timeframes.
In
this
study,
we
use
floors
concrete
ceilings'
hypothesis
generate
then
test
predictions
regarding
physiology
world's
hottest
most
variable
ecosystem
(southern
Arabian/Persian
Gulf).
By
comparing
three
(Scolopsis
ghanam,
Ecsenius
pulcher
Cheilodipterus
novemstriatus)
from
southern
Gulf,
an
annual
range
18.0°C-36.5°C,
conspecifics
nearby
but
more
benign
(~21.0°C-32.0°C)
reefs
Gulf
Oman,
find
enhanced
limits
broadening
performance
curves
aerobic
scope
no
evidence
changes
('plastic
floors').
Despite
these
conserved
increases
tolerance,
summer
safety
margins
were
1.47°C
lower
than
those
demonstrating
while
tolerance
tropical
somewhat
plastic
timeframes,
its
rate
likely
insufficient
keep
pace
growing
variability
expected
climate
change.
Язык: Английский
Cardiac mitochondria function in embryonic and 1-year old American alligators, Alligator mississippiensis, is not altered by hypoxic incubation or an acute anoxic challenge
Journal of Comparative Physiology B,
Год журнала:
2025,
Номер
unknown
Опубликована: Май 4, 2025
Язык: Английский
The integrative biology of the heart: mechanisms enabling cardiac plasticity
Journal of Experimental Biology,
Год журнала:
2024,
Номер
227(20)
Опубликована: Окт. 15, 2024
Cardiac
phenotypic
plasticity,
the
remodelling
of
heart
structure
and
function,
is
a
response
to
any
sustained
(or
repeated)
stimulus
or
stressor
that
results
in
change
performance.
plasticity
can
be
either
adaptive
(beneficial)
maladaptive
(pathological),
depending
on
nature
intensity
stimulus.
Here,
we
draw
articles
published
this
Special
Issue
Journal
Experimental
Biology,
from
broader
comparative
physiology
literature,
highlight
core
components
enable
cardiac
including
structural
remodelling,
excitation-contraction
coupling
metabolic
rewiring.
We
discuss
when
how
these
changes
occur,
with
focus
underlying
molecular
mechanisms,
regulation
gene
transcription
by
epigenetic
processes
post-translational
modifications
proteins.
Looking
future,
anticipate
growing
use
-omics
technologies
integration
traditional
approaches
will
allow
researchers
continue
uncover
vast
scope
for
function
across
animals.
Язык: Английский
Impact of Late Stage Hypoxic Stimulation and Layer Breeder Age on Embryonic Development, Hatching and Chick Quality
Poultry Science,
Год журнала:
2024,
Номер
104(2), С. 104691 - 104691
Опубликована: Дек. 24, 2024
The
present
study
examined
the
effects
of
breeder
age
and
oxygen
(O₂)
concentrations
during
late
chorioallantoic
membrane
(CAM)
growth
stage
on
embryo
development,
hatching
dynamics,
chick
quality,
bone
mineralization
hatchability.
A
total
1200
eggs
from
33-
50-week-old
ISA
layer
breeders,
weighing
53.85
g
60.42
average
respectively,
were
incubated
at
37.7°C
56
%
relative
humidity.
From
embryonic
day
(ED)
13
to
15,
experimental
exposed
hypoxia
(15
or
17
O₂
for
1
hr/day)
while
control
was
21
O₂.
Results
showed
significant
interactions
(p
=
0.040)
between
level,
with
embryos
15
exhibiting
slower
by
ED
17.
However,
weight
internal
pipping
(IP)
unaffected
>
0.05).
At
hatch,
weights
higher
in
hypoxic
groups
due
increased
yolk
sac
retention
0.024),
yolk-free
influenced
only
<
0.001).
Hypoxia
reduced
length,
toe
tibia
parameters
0.05),
likely
impaired
calcium
phosphorus
absorption.
Embryos
O
Язык: Английский