Frontiers in Cellular and Infection Microbiology,
Journal Year:
2023,
Volume and Issue:
13
Published: June 19, 2023
Many
Gram-negative
bacteria
use
quorum
sensing
(QS)
signal
molecules
to
monitor
their
local
population
density
and
coordinate
collective
behaviors.
The
diffusible
factor
(DSF)
family
represents
an
intriguing
type
of
QS
mediate
intraspecies
interspecies
communication.
Recently,
accumulating
evidence
demonstrates
the
role
DSF
in
mediating
inter-kingdom
communication
between
DSF-producing
plants.
However,
regulatory
mechanism
during
Xanthomonas-plant
interactions
remain
unclear.Plants
were
pretreated
with
different
concentration
subsequent
inoculated
pathogen
Xanthomonas
campestris
pv.
(Xcc).
Pathogenicity,
phynotypic
analysis,
transcriptome
combined
metabolome
genetic
analysis
gene
expression
used
evaluate
priming
effects
on
plant
disease
resistance.We
found
that
low
could
prime
immunity
against
Xcc
both
Brassica
oleracea
Arabidopsis
thaliana.
Pretreatment
invasion
triggered
augmented
burst
ROS
by
DCFH-DA
DAB
staining.
CAT
application
attenuate
level
induced
DSF.
RBOHD
RBOHF
up-regulated
activities
antioxidases
POD
increased
after
treatment
followed
inoculation.
Transcriptome
showed
hormone
jasmonic
acid
(JA)
signaling
involved
DSF-primed
resistance
Arabidopsis.
JA
synthesis
genes
(AOC2,
AOS,
LOX2,
OPR3
JAR1),
transportor
(JAT1),
regulator
(JAZ1
MYC2)
responsive
(VSP2,
PDF1.2
Thi2.1)
significantly
upon
challenge.
primed
not
observed
relevant
mutant
coi1-1
jar1-1.These
results
indicated
was
dependent
pathway.
Our
findings
advanced
understanding
signal-mediated
provide
a
new
strategy
for
control
black
rot
oleracea.
Critical Reviews in Microbiology,
Journal Year:
2025,
Volume and Issue:
unknown, P. 1 - 16
Published: Jan. 27, 2025
This
review
discusses
the
chemical
properties,
synthesis
and
detection,
biological
functions
of
a
molecular
group
cis-2-unsaturated
fatty
acids,
containing
acid
carbon
chains
various
lengths
cis
double-bond
configurations,
known
as
diffusible
signaling
factor
family
(DSFF).
Early
postulation
conserved
nature
DSFF
among
Gram-negative
bacteria
have
now
been
challenged
by
latest
evidences
that
unraveled
their
presence
in
other
distinct
microorganisms.
Over
last
decade,
significant
depth
breadth
understanding
has
made
on
multifaceted
DSFFs
bacteria,
interactions
with
evolutionarily
divergent
fungi,
plants
insects
small
animals.
While
knowledge
within
microbial
systems
is
still
developing,
molecules
such
BDSF,
DSF,
SDSF
found
to
modulate
virulence,
cell
adhesion,
biofilm
formation
dispersion,
motility,
antimicrobial
tolerance.
Given
capacity
influence
ecosystems
rapid
emergence
novel
DSFF-like
molecules,
it
critical
identify
full
spectrum
members
better
understand
this
complex
messenger
system
they
offer
potential
be
exploited
development
new
therapeutic
strategies
combat
rising
global
healthcare
threat
resistance.
narrative
therefore
provides
broad
picture
quorum
sensing
core
foundation
built
from
seminal
literature
while
highlighting
developments
field.
Journal of Agricultural and Food Chemistry,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 4, 2025
Phytopathogen
Xanthomonas
campestris
pv
(Xcc)
uses
various
mechanisms,
including
the
quorum
sensing
(QS)
system,
to
regulate
infection
and
colonize
cruciferous
host
plants.
Hydroxycinnamic
acids
(HCAs)
are
widely
distributed
in
plant
kingdom,
but
their
effect
on
diffusible
signaling
factor
family
QS
signal
of
Xcc
remains
unknown.
In
this
study,
we
report
that
HCAs
activate
RpfB-dependent
turnover
via
sensor
protein
HepR,
which
turn
activates
HepABCD
resistance-nodulation-division
efflux
pump
remove
Xcc.
Exogenous
addition
three
induced
DSF
during
late
growth
phase
XYS
medium.
Furthermore,
HCAs-induced
was
dependent
DSF-degrading
enzyme
RpfB
HepR.
Additionally,
pumps
through
pump.
An
electrophoretic
mobility
shift
assay
demonstrated
interfere
with
binding
HepR
Phep
promoter.
This
work
provides
insight
into
molecular
interactions
between
npj Biofilms and Microbiomes,
Journal Year:
2025,
Volume and Issue:
11(1)
Published: March 4, 2025
Complex
molecules-mediated
interactions,
which
are
based
on
the
bidirectional
information
exchange
between
microbes
and
human
cells,
enable
defense
against
diseases
health
maintenance.
Recently,
diverse
single-direction
interactions
active
metabolites,
immunity
factors,
quorum
sensing
signals
have
largely
been
summarized
separately.
In
this
review,
according
to
a
simplified
timeline,
we
proposed
framework
of
Molecules-mediated
Bidirectional
Interactions
(MBI)
microbe
humans
decipher
understand
their
intricate
systematically.
About
microbe-derived
various
molecules,
such
as
short-chain
fatty
acids,
bile
tryptophan
catabolites,
corresponding
receptors.
Concerning
human-derived
reviewed
effect
including
hormones,
cytokines,
other
circulatory
metabolites
microbial
characteristics
phenotypes.
Finally,
discussed
challenges
trends
for
developing
deciphering
molecule-mediated
potential
applications
in
guard
health.
Journal of Basic Microbiology,
Journal Year:
2025,
Volume and Issue:
unknown
Published: March 28, 2025
ABSTRACT
Autoinducer‐2
(AI‐2)
is
a
bacterial
quorum
sensing
(QS)
signaling
molecule
that
regulates
inter‐specific
and
intraspecific
communication
in
complex
ecological
environments.
Here,
we
systematically
analyzed
the
distribution
of
AI‐2
QS‐related
proteins
(synthases
receptors)
domain
bacteria,
explored
evolution
development
receptors,
regulatory
networks
using
human
intestinal
metagenomic
data.
The
results
show
are
distributed
17
phyla,
accounting
for
approximately
36.80%
total
genomes.
Based
on
ability
bacteria
to
synthesize
receive
signals,
divided
into
four
major
categories,
namely
Prosumer,
Producer,
Monitor,
Immunizer.
Gram‐positive
mainly
responsible
producing
while
Gram‐negative
more
likely
respond
AI‐2.
Evolutionary
analysis
shows
receptor
CahR
derived
from
methyl‐accepting
chemotaxis
protein
(MCP).
length
difference
ligand‐binding
domains,
further
speculate
binding
activates
through
either
allostery
or
aggregation
mode.
Using
data,
found
strong
correlation
between
c‐di‐GMP
signaling.
These
findings
will
have
an
important
impact
QS
research
accelerate
its
development.