Cell,
Journal Year:
2024,
Volume and Issue:
187(7), P. 1801 - 1818.e20
Published: March 1, 2024
The
repertoire
of
modifications
to
bile
acids
and
related
steroidal
lipids
by
host
microbial
metabolism
remains
incompletely
characterized.
To
address
this
knowledge
gap,
we
created
a
reusable
resource
tandem
mass
spectrometry
(MS/MS)
spectra
filtering
1.2
billion
publicly
available
MS/MS
for
bile-acid-selective
ion
patterns.
Thousands
are
distributed
throughout
animal
human
bodies
as
well
cultures.
We
employed
library
identify
polyamine
amidates,
prevalent
in
carnivores.
They
present
humans,
their
levels
alter
with
diet
change
from
Mediterranean
typical
American
diet.
This
work
highlights
the
existence
many
more
acid
than
previously
recognized
value
leveraging
public
large-scale
untargeted
metabolomics
data
discover
metabolites.
availability
modification-centric
will
inform
future
studies
investigating
roles
health
disease.
Gut,
Journal Year:
2024,
Volume and Issue:
73(11), P. 1893 - 1908
Published: Sept. 25, 2024
The
understanding
that
changes
in
microbiome
composition
can
influence
chronic
human
diseases
and
the
efficiency
of
therapies
has
driven
efforts
to
develop
microbiota-centred
such
as
first
next
generation
probiotics,
prebiotics
postbiotics,
microbiota
editing
faecal
transplantation.
Central
research
is
how
disease
impacts
vice
versa,
yet
there
a
problematic
issue
with
term
'dysbiosis',
which
broadly
links
microbial
imbalances
various
illnesses
without
precision
or
definition.
Another
significant
discussions
defining
'healthy
individuals'
ascertain
what
characterises
healthy
microbiome.
This
involves
questioning
who
represents
healthiest
segment
our
population-whether
it
those
free
from
illnesses,
athletes
at
peak
performance,
individuals
living
healthily
through
regular
exercise
good
nutrition
even
elderly
adults
centenarians
have
been
tested
by
time
achieved
remarkable
longevity.This
review
advocates
for
delineating
'what
defines
microbiome?'
considering
broader
range
factors
related
health
environmental
influences
on
microbiota.
A
undoubtedly
linked
gut
health.
Nevertheless,
very
difficult
pinpoint
universally
accepted
definition
'gut
health'
due
complexities
measuring
functionality
besides
composition.
We
must
take
into
account
individual
variabilities,
diet,
lifestyle,
host
factors.
Moreover,
challenge
distinguishing
causation
correlation
between
overall
presented.The
also
highlights
resource-heavy
nature
comprehensive
assessments,
hinders
their
practicality
broad
application.
Finally,
we
call
continued
nuanced
approach
better
understand
intricate
evolving
concept
health,
emphasising
need
more
precise
inclusive
definitions
methodologies
studying
Gut Microbes,
Journal Year:
2024,
Volume and Issue:
16(1)
Published: July 24, 2024
Commensal
microorganisms
in
the
human
gut
produce
numerous
metabolites
by
using
small
molecules
derived
from
host
or
diet
as
precursors.
Host
dietary
lipid
are
involved
energy
metabolism
and
maintaining
structural
integrity
of
cell
membranes.
Notably,
microbes
can
convert
these
lipids
into
bioactive
signaling
through
their
biotransformation
synthesis
pathways.
These
microbiota-derived
affect
physiology
influencing
body's
immune
metabolic
processes.
This
review
aims
to
summarize
recent
advances
microbial
transformation
immunomodulatory
functions
metabolites,
with
a
special
focus
on
fatty
acids
steroids
produced
our
microbiota.
bioRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2025,
Volume and Issue:
unknown
Published: Jan. 4, 2025
Abstract
Bacteroidota,
a
diverse
phylum
of
bacteria,
are
increasingly
recognized
for
their
significant
contributions
to
host
health,
particularly
through
antimicrobial
and
probiotic
properties.
This
study
investigates
the
functional
diversity
potential
42
new
Bacteroidota
strains
enriched
identified
from
hosts,
including
mouse
ceca
human
stool
samples.
Using
16S
rRNA
gene
sequencing,
we
phylogenetically
characterized
genera
Bacteroides,
Phocaeicola
Sphingobacterium
assessed
properties
related
potential.
The
were
evaluated
concerning
ability
inhibit
biofilm
formation
WHO
declared
clinically
pathogens,
gram-positive
Staphylococcus
aureus
epidermidis
,
gram-negative
Klebsiella
oxytoca
Pseudomonas
aeruginosa
eukaryotic
fungus
Candida
albicans.
Additionally,
investigated
bile
salt
hydrolase
quorum
quenching
activities
strains,
key
traits
associated
with
efficacy.
Our
findings
demonstrate
that
all
examined
consistently
exhibit
capacity
but
different
extent.
Furthermore,
14
showed
activity,
39
highlighting
High
inhibition
as
well
activity
against
both
autoinducers,
AHL
AI-2,
predominantly
observed
in
Bacteroides
caecimuris
muris
making
them
attractive
candidates
next-generation
probiotics.
Overall,
this
advances
field
probiotics
by
identifying
promising
therapeutic
applications
potentially
revolutionizing
approaches
microbiome-based
interventions
pathogen
control
clinical
settings.
Biomolecules,
Journal Year:
2025,
Volume and Issue:
15(1), P. 86 - 86
Published: Jan. 8, 2025
Bile
salt
hydrolase
(BSH;
EC
3.5.1.24)
is
the
microbial
enzyme
that
catalyzes
conversion
of
primary
bile
acids
(BAs)
into
secondary
ones,
promoting
adaptation
and
modulating
several
host's
biological
functions.
Probiotics
with
BSH
activity
are
supposed
to
survive
harsh
intestinal
conditions
exert
a
cholesterol-lowering
effect.
Here,
Lacticaseibacillus
rhamnosus
strains
(VB4
VB1),
isolated
from
vaginal
ecosystem,
were
submitted
genomic
survey,
in
vitro
activity,
BAs
tolerance
assay
unravel
their
probiotic
potential
as
modulators.
The
draft
genomes
Lcb.
VB4
VB1
comprised
2769
2704
CDSs,
respectively.
Gene
annotation
revealed
numerous
strain-specific
genes
involved
metabolism
transport,
well
DNA
recombination.
Each
strain
harbors
single
bsh
gene,
encoding
C-N
amide
hydrolase,
which
conserved
essential
residues
required
core
site.
According
results,
compared
VB1,
tolerated
better
stress
was
more
active
deconjugating
BAs.
However,
increased
gene
transcription
but
not
strain,
suggesting
partially
nonlinear
relationship
between
expression.
In
conclusion,
despite
complexity
transcriptional
system,
results
support
promising
BAs-deconjugating
candidate.
Sclerosis,
Journal Year:
2025,
Volume and Issue:
3(1), P. 8 - 8
Published: March 5, 2025
Background/Objectives:
Amyotrophic
lateral
sclerosis
(ALS)
is
a
neurodegenerative
disorder
characterized
by
the
progressive
degeneration
of
motor
neurons.
The
gut
microbiota,
community
microorganisms
in
digestive
tract,
has
recently
been
implicated
ALS
pathogenesis
through
its
influence
on
neuroinflammation
and
metabolic
pathways.
This
review
explores
potential
role
microbiota
metabolites
progression
investigates
therapeutic
approaches
targeting
microbiota.
Methods:
A
comprehensive
current
literature
was
conducted
to
assess
relationship
between
composition,
microbial
metabolites,
patients.
We
searched
for
published
reports
ALS,
emphasizing
complex
interplay
dysbiosis,
neuroinflammation,
systemic
metabolism.
Special
emphasis
placed
studies
exploring
short-chain
fatty
acids
(SCFAs),
bacterial
amyloids
(curli-like
factors),
neurotoxins
such
as
β-methylamino-L-alanine
(BMAA).
liver–gut
axis
evaluated
well.
changes
would
sustain
rationale
strategies
probiotics,
prebiotics,
fecal
transplantation
(FMT),
dietary
interventions.
Results:
patients
exhibit
reduced
SCFA-producing
bacteria
an
increase
potentially
pathogenic
genera.
Of
note,
different
do
not
agree
common
patterns
being
linked
supporting
need
further,
more
extensive
studies.
Dysbiosis
sometimes
correlates
with
inflammation
disrupted
liver
function,
amplifying
neuroinflammatory
responses.
Key
including
SCFAs,
amyloids,
BMAA,
may
exacerbate
neuron
promoting
protein
misfolding,
oxidative
stress,
neuroinflammation.
Emerging
strategies,
probiotics
FMT,
show
restoring
balance,
although
clinical
data
remain
limited.
Conclusions:
could
modulate
metabolism
ALS.
Microbiota-targeted
therapies,
interventions,
represent
promising
avenues
mitigating
disease
progression.
Further
research
required
validate
these
interventions
large-scale,
longitudinal
develop
personalized
microbiota-based
treatments
tailored
individual
phenotypes.