bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2023,
Volume and Issue:
unknown
Published: April 3, 2023
Abstract
Conjugative
plasmids
play
a
key
role
in
the
dissemination
of
antimicrobial
resistance
(AMR)
genes
across
bacterial
pathogens.
AMR
are
widespread
clinical
settings,
but
their
distribution
is
not
random,
and
certain
associations
between
clones
particularly
successful.
For
example,
globally
spread
carbapenem
plasmid
pOXA-48
can
use
wide
range
enterobacterial
species
as
hosts,
it
usually
associated
with
small
number
specific
Klebsiella
pneumoniae
clones.
These
successful
represent
an
important
threat
for
hospitalized
patients.
However,
knowledge
remains
limited
about
factors
determining
clinically
relevant
bacteria.
Here,
we
combined
vitro
vivo
experimental
approaches
to
analyze
pOXA-48-associated
levels
conjugation
dynamics
collection
wild
type
strains
isolated
from
Our
results
reveal
significant
variability
these
traits
different
spp.
showing
higher
pOXA-48-mediated
frequencies
than
Escherichia
coli
strains.
Using
experimentally
determined
parameters,
developed
simple
mathematical
model
interrogate
contribution
permissiveness
communities.
The
simulations
revealed
that
subset
clones,
combining
high
permissiveness,
critical
stabilizing
polyclonal
microbial
help
explain
preferential
association
K.
settings.
More
generally,
our
study
reveals
species-
strain-specific
plasmid-associated
phenotypes
shape
evolution
Significance
statement
disseminate
Understanding
rules
governing
communities
therefore
crucial
controlling
global
crisis.
In
this
study,
analyzed
great
relevance,
pOXA-48,
bacteria
recovered
We
reported
degree
two
phenotypes,
level
ability,
based
on
results,
studied
how
arise
accounting
understand
Journal of Enzyme Inhibition and Medicinal Chemistry,
Journal Year:
2023,
Volume and Issue:
38(1)
Published: Nov. 23, 2023
Carbonic
anhydrases
(CAs)
from
the
pathogenic
bacteria
Nesseria
gonorrhoeae
and
vancomycin-resistant
enterococci
(VRE)
have
recently
been
validated
as
antibacterial
drug
targets.
Here
we
explored
inhibition
of
α-CA
N.
(α-NgCA),
α-
γ-class
enzymes
Enterococcus
faecium
(α-EfCA
γ-EfCA)
with
a
panel
aliphatic,
heterocyclic
aryl-alkyl
primary/secondary
monothiocarbamates
(MTCs).
α-NgCA
was
inhibited
in
vitro
KIs
ranging
0.367
to
0.919
µM.
The
compounds
α-EfCA
γ-EfCA
KI
ranges
0.195–0.959
µM
0.149–1.90
µM,
respectively.
Some
MTCs
were
also
investigated
for
their
inhibitory
effects
on
growth
clinically-relevant
VRE
strains.
No
noted
all
MTCs,
whereas
one
compound
(13)
strains
at
concentrations
16
64
µg/mL.
This
suggests
that
13
may
be
potential
agent
against
gonorrhoeae.
microLife,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 23, 2025
Abstract
Oil
reservoirs
are
society's
primary
source
of
hydrocarbons.
While
microbial
communities
in
industrially
exploited
oil
have
been
investigated
the
past,
pristine
untapped
little
explored,
as
distribution
patterns
respective
genetic
signatures.
Here,
we
show
that
a
sample
contains
complex
community
consisting
bacteria
and
fungi
for
degradation
We
identified
microorganisms
their
pathways
methane,
n-alkanes,
mono-aromatic,
polycyclic
aromatic
compounds
metagenome
retrieved
from
biodegraded
petroleum
encountered
subsurface
reservoir
Barents
Sea.
Capitalizing
on
marker
genes
metagenomes
public
data
mining,
compared
prokaryotes,
putative
viruses,
plasmids
sampled
site
to
those
ten
other
hydrocarbon-associated
sites,
revealing
shared
network
species
elements
across
globe.
To
test
potential
dispersal
microbes
predicted
via
seawater,
our
findings
Tara
Ocean
dataset,
resulting
broad
prokaryotic
viral
Although
frequently
between
plasmids,
however,
showed
coverage
Oceans
suggesting
an
undiscovered
mode
transfer
hydrocarbon-affected
ecosystems.
Based
analyses,
information
is
globally
propose
currents
physical
occurrences
within
ocean
along
with
deep
aquifers
major
distributors
prokaryotes
viruses
into
these
Molecular Systems Biology,
Journal Year:
2024,
Volume and Issue:
20(4), P. 311 - 320
Published: Feb. 26, 2024
Abstract
Antimicrobial
resistance
(AMR)
in
bacteria
is
a
major
public
health
threat
and
conjugative
plasmids
play
key
role
the
dissemination
of
AMR
genes
among
bacterial
pathogens.
Interestingly,
association
between
pathogens
not
random
certain
associations
spread
successfully
at
global
scale.
The
burst
genome
sequencing
has
increased
resolution
epidemiological
programs,
broadening
our
understanding
plasmid
distribution
populations.
Despite
immense
value
these
studies,
ability
to
predict
future
plasmid-bacteria
remains
limited.
Numerous
empirical
studies
have
recently
reported
systematic
patterns
genetic
interactions
that
enable
predictability,
phenomenon
known
as
epistasis.
In
this
perspective,
we
argue
epistasis
hold
potential
genomes,
thereby
facilitating
prediction
successful
associations.
To
assess
validity
idea,
use
previously
published
data
identify
clinically
relevant
Furthermore,
using
simple
mechanistic
models
antibiotic
resistance,
illustrate
how
may
allow
us
generate
new
hypotheses
on
mechanisms
associated
with
Collectively,
aim
illustrating
relevance
exploring
context
biology.
Proceedings of the Royal Society B Biological Sciences,
Journal Year:
2024,
Volume and Issue:
291(2025)
Published: June 1, 2024
Antibiotic
resistance
genes
(ARGs)
benefit
host
bacteria
in
environments
containing
corresponding
antibiotics,
but
it
is
less
clear
how
they
are
maintained
where
antibiotic
selection
weak
or
sporadic.
In
particular,
few
studies
have
measured
if
the
direct
effect
of
ARGs
on
fitness
fixed
depends
strain,
perhaps
marking
some
ARG–host
combinations
as
selective
refuges
that
can
maintain
absence
selection.
We
quantified
effects
six
11
diverse
Escherichia
spp.
strains.
Three
(bla
TEM-116
,
cat
and
dfrA5
encoding
to
β-lactams,
chloramphenicol,
trimethoprim,
respectively)
imposed
an
overall
cost,
all
had
at
least
one
reflecting
a
significant
strain
interaction
effect.
A
simulation
predicts
these
interactions
cause
success
depend
available
strains,
and,
lesser
extent,
present
community.
These
results
indicate
importance
considering
ARG
across
different
especially
potential
refuge
strains
allow
persist
selection,
efforts
understand
dynamics.
Ecology and Evolution,
Journal Year:
2024,
Volume and Issue:
14(8)
Published: Aug. 1, 2024
Abstract
Plasmids
incur
a
fitness
cost
that
has
the
potential
to
restrict
dissemination
of
resistance
in
bacterial
pathogens.
However,
bacteria
can
overcome
this
disadvantage
by
compensatory
evolution
maintain
their
resistance.
Compensatory
occur
via
both
chromosomes
and
plasmids,
but
there
are
few
reviews
regarding
topic,
most
them
focus
on
plasmids.
In
review,
we
provide
comprehensive
overview
currently
reported
mechanisms
underlying
elucidate
key
targets
regulating
plasmid
cost,
discuss
future
challenges
field.
We
found
primarily
arises
from
mutations
transcriptional
regulatory
factors,
whereas
plasmids
predominantly
involves
three
pathways:
copy
number
regulation,
conjugation
transfer
efficiency,
expression
antimicrobial
(AMR)
genes.
Furthermore,
importance
reasonable
selection
research
subjects
effective
integration
diverse
advanced
methods
is
also
emphasized
our
study
mechanisms.
Overall,
review
establishes
theoretical
framework
aims
innovative
ideas
for
minimizing
emergence
spread
AMR