Chemical Research in Toxicology,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 21, 2025
It
is
uncertain
whether
exposure
to
environmental
concentrations
of
perfluorobutanesulfonate
(PFBS)
disrupts
the
reproductive
endocrine
system
in
amphibian
tadpoles.
In
this
study,
tadpoles
(Lithobates
catesbeianus)
G26
stage
were
treated
with
different
levels
PFBS
(0,
1,
3,
and
10
μg/L)
for
60
days
investigate
how
affects
gonadal
development
Tadpole
testes
exhibited
structural
damage
germ
cells
significantly
fewer
spermatogonia
following
exposure,
but
sex
ratio
remained
unaffected.
Further,
downregulated
transcripts
genes
associated
ovarian
(figla
nobox)
testicular
(sox9
dmrt1)
Encoding
gonadotropin
hormone
transcriptionally
upregulated
pituitary,
serum
gonadotropins
(FSH
LH)
elevated.
Genes
related
testosterone
synthesis
upregulated,
raised.
The
transcription
cyp19a1
gene,
which
involved
estradiol
(E2),
was
downregulated,
leading
decreased
E2.
Furthermore,
transcript
level
vitellogenin
gene
liver.
Thus,
appears
disrupt
hypothalamic-pituitary-gonadal-liver
axis
tadpoles,
subsequently
impacting
development.
findings
study
indicate
that
threaten
amphibians
first
time.
This
provides
important
insights
further
investigation
into
risk
poses
stability
population.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: May 30, 2024
Abstract
Fluorinated
organic
chemicals,
such
as
per-
and
polyfluorinated
alkyl
substances
(PFAS)
fluorinated
pesticides,
are
both
broadly
useful
unusually
long-lived.
To
combat
problems
related
to
the
accumulation
of
these
compounds,
microbial
PFAS
organofluorine
degradation
biosynthesis
less-fluorinated
replacement
chemicals
under
intense
study.
Both
efforts
undermined
by
substantial
toxicity
fluoride,
an
anion
that
powerfully
inhibits
metabolism.
Microorganisms
have
contended
with
environmental
mineral
fluoride
over
evolutionary
time,
evolving
a
suite
detoxification
mechanisms.
In
this
perspective,
we
synthesize
emerging
ideas
on
defluorination/fluorination
resistance
mechanisms
identify
best
approaches
for
bioengineering
new
degrading
making
compounds.
ACS Omega,
Journal Year:
2025,
Volume and Issue:
10(10), P. 10675 - 10684
Published: March 4, 2025
Water
contamination
with
"forever
chemicals"
like
per-
and
polyfluoroalkyl
substances
(PFAS)
poses
significant
toxicity
to
the
environment.
Since
they
are
most
persistent
synthetic
chemicals
that
hardly
degrade
in
natural
environment
carcinogenic
humans,
there
is
an
urgent
need
discover
novel
processes
for
destroying
PFAS.
Herein,
we
report
on
design
of
a
reduced
graphene
oxide
(r-GO)/WO3
nanoflower
(WO3-NF)-based
heterostructure
harnessing
365
nm
light-driven
photocatalytic
oxidation
reduction
process
toward
degradation
perfluorononanoic
acid
(PFNA).
Moreover,
reported
data
reveal
using
r-GO/WO3-NF
photocatalyst,
100%
PFNA
14%
defluorination
can
be
achieved
presence
isopropyl
alcohol
as
hydroxy
radical
(•OH)
quencher
or
glucose
hot
hole
(h+)
after
exposure
light
22
h.
A
mechanistic
study
shows
synergistic
vital
complete
PFNA,
where
hydrated
electron
(eaq
-)
plays
key
role
reducing
agent
h+
•OH
act
agents.
Furthermore,
destruction
mechanism
indicates
chain
shortening
via
C-C
bond
breaking
C-F
major
pathways
degradation.
wavelength-dependent
only
22%
532
h,
which
due
lack
formation
electrons
-).
The
current
sheds
construction
r-GO/WO3
NF
heterojunction
highly
efficient
Frontiers in Microbiology,
Journal Year:
2023,
Volume and Issue:
14
Published: July 21, 2023
Microorganisms
that
exhibit
resistance
to
environmental
stressors,
particularly
heavy
metals,
have
the
potential
be
used
in
bioremediation
strategies.
This
study
aimed
explore
and
identify
microorganisms
are
resistant
metals
soil
environments
as
candidates
for
bioremediation.
Metagenomic
analysis
was
conducted
using
microbiome
metagenomes
obtained
from
rhizosphere
of
contaminated
with
mineral-affected
soil.
The
resulted
recovery
a
total
175
metagenome-assembled
genomes
(MAGs),
73
which
were
potentially
representing
novel
taxonomic
levels
beyond
genus
level.
constructed
ecological
network
revealed
presence
keystone
taxa,
including
Rhizobiaceae,
Xanthobacteraceae,
Burkholderiaceae
,
Actinomycetia
.
Among
recovered
MAGs,
50
associated
these
taxa.
Notably,
MAGs
displayed
an
abundance
genes
conferring
other
abiotic
stresses,
those
affiliated
These
found
combat
excessive
accumulation
zinc/manganese,
arsenate/arsenite,
chromate,
nickel/cobalt,
copper,
tellurite.
Furthermore,
taxa
utilize
both
organic
inorganic
energy
sources,
such
sulfur,
arsenic,
carbon
dioxide.
Additionally,
exhibited
ability
promote
vegetation
development
re-vegetated
mining
areas
through
phosphorus
solubilization
metabolite
secretion.
In
summary,
our
highlights
metabolic
adaptability
significance
microbial
soils.
markedly
higher
number
related
stress
plant
growth
promotion
compared
non-keystone
MAGs.
Journal of Earth Science,
Journal Year:
2024,
Volume and Issue:
35(2), P. 729 - 736
Published: April 1, 2024
Lakes
are
the
main
reservoirs
of
persistent
organic
pollutants
(POPs)
from
land,
atmosphere
and
rivers.
POPs
in
lakes
undergo
complex
exchange,
transformation,
degradation
between
water-air-sediment-biota
interfaces,
which
constrained
regulated
by
various
physical,
chemical
biological
factors.
can
affect
ecological
conditions,
properties
water
sediments,
biodiversity
lake
system.
Therefore,
it
is
important
to
study
sources,
migration,
environmental
behavior
impacts
ecosystems.
This
review
summarizes
research
progress
on
detection
technologies,
diversity
origins,
historical
records,
migration
distribution
patterns,
toxic
effects
lakes.
Finally,
future
directions
related
were
summarized.
