National Science Review,
Journal Year:
2024,
Volume and Issue:
12(1)
Published: Sept. 29, 2024
ABSTRACT
Carbon-14
(C-14)
has
been
a
major
contributor
to
the
human
radioactive
exposure
dose,
as
it
is
released
into
environment
from
nuclear
industry
in
larger
quantities
compared
other
radionuclides.
This
most
abundant
nuclide
enters
biosphere
organically
bound
C-14
(OBC-14),
posing
potential
threat
public
health.
Yet,
remains
unknown
how
this
relatively
low
radiotoxic
induces
health
risks
via
chemical
effects,
such
isotope
effect.
By
establishing
trophic
transfer
model
involving
algae
(Scenedesmus
obliquus),
daphnia
(Daphnia
magna)
and
zebrafish
(Danio
rerio),
we
demonstrate
that
rapid
incorporation
transformation
of
inorganic
by
OBC-14
facilitates
blending
biomolecules
zebrafish.
We
find
internalized
persistently
retained
brain
zebrafish,
affecting
DNA
methylation
causing
alterations
neuropathology.
Global
tracing
metabolomics
with
further
reveals
involvement
various
critical
metabolic
pathways,
including
one-carbon
metabolism
nucleotide
metabolism.
thus
characterize
kinetic
effects
for
12C/14C
key
reactions
these
pathways
through
experiments
density
functional
theory
computations,
showing
isotopic
substitution
carbon
biochemicals
regulates
disrupting
reaction
ratios
effects.
Our
results
suggest
discharged
can
be
biotransformed
impact
providing
new
insights
understanding
risk
C-14,
which
traditionally
considered
nuclide.
Metformin
has
been
widely
detected
in
aquatic
ecosystems,
yet
the
knowledge
of
its
impact
on
organisms,
particularly
at
environmentally
relevant
concentrations,
remains
limited.
In
present
study,
we
characterized
developmental
toxicity
metformin
zebrafish,
utilizing
a
transcriptome-guided
toxicological
assessment
framework.
Transcriptomic
analysis
conducted
concentrations
within
μg/L
range
revealed
significant
disruptions
biological
processes
associated
with
nucleotide,
hydrocarbon,
and
amino
acid
metabolism,
suggesting
disturbance
energy
homeostasis.
This
observation
was
corroborated
by
energy-targeted
metabolomic
analysis,
wherein
considerable
number
metabolites
involved
purine
pyrimidine
citrate
cycle
displayed
alterations.
Notably,
most
intermediates
such
as
acetyl-CoA
exhibited
remarkable
decreases.
Additionally,
our
study
identified
impediments
zebrafish
embryonic
development,
including
decreased
yolk
extension
progress,
spontaneous
contraction
body
length,
increased
sac
area
yolk/while
lipid
content
ratio,
low
0.12
μg/L.
Furthermore,
disruption
homeostasis
observed
to
persist
into
adulthood
even
after
prolonged
recovery
period.
The
findings
highlighted
disruptive
effects
development
teleost
thereby
prompting
reevaluation
environmental
risk
nontarget
organisms.
Frontiers in Physiology,
Journal Year:
2023,
Volume and Issue:
14
Published: Oct. 3, 2023
Throughout
their
lives,
humans
encounter
a
plethora
of
substances
capable
inducing
neurotoxic
effects,
including
drugs,
heavy
metals
and
pesticides.
Neurotoxicity
manifests
when
exposure
to
these
chemicals
disrupts
the
normal
functioning
nervous
system,
some
agents
have
been
linked
neurodegenerative
pathologies
such
as
Parkinson's
Alzheimer's
disease.
The
growing
concern
surrounding
impacts
both
naturally
occurring
man-made
toxic
necessitates
identification
animal
models
for
rapid
testing
across
wide
spectrum
concentrations,
utilization
tools
detecting
system
alterations
spanning
from
molecular
level
up
behavioural
one.
Zebrafish
(Danio
rerio)
is
gaining
prominence
in
field
neuroscience
due
its
versatility.
possibility
analysing
all
developmental
stages
(embryo,
larva
adult),
applying
most
common
"omics"
approaches
(transcriptomics,
proteomics,
lipidomics,
etc.)
conducting
range
tests
makes
zebrafish
an
excellent
model
neurotoxicity
studies.
This
review
delves
into
main
experimental
adopted
markers
analysed
studies
zebrafish,
showing
that
phenomena
can
be
triggered
not
only
by
chemical
but
also
fluctuations
temperature.
findings
presented
here
serve
valuable
resource
study
define
new
scenarios
ecotoxicology
suggesting
temperature
synergistically
compound
effects
substances,
intensifying
detrimental
impact
on
fish
populations.