Current Opinion in Microbiology,
Год журнала:
2022,
Номер
70, С. 102229 - 102229
Опубликована: Ноя. 5, 2022
While
they
are
the
most
abundant
biological
entities
on
planet,
role
of
bacteriophages
(phages)
in
microbiome
remains
enigmatic
and
understudied.
With
a
rise
number
metagenomics
studies
publication
highly
efficient
phage
mining
programmes,
we
now
have
extensive
data
genomic
taxonomic
diversity
(mainly)
DNA
wide
range
environments.
In
addition,
higher
throughput
quality
sequencing
is
allowing
for
strain-level
reconstructions
genomes
from
metagenomes.
These
factors
will
ultimately
help
us
to
understand
these
phages
play
as
part
specific
microbial
communities,
enabling
tracking
individual
virus
through
space
time.
Using
lessons
learned
latest
metagenomic
studies,
focus
two
explicit
aspects
within
microbiome,
their
ecological
structuring
bacterial
populations,
contribution
functioning
by
encoding
auxiliary
metabolism
genes.
The ISME Journal,
Год журнала:
2021,
Номер
16(3), С. 686 - 694
Опубликована: Сен. 22, 2021
Abstract
Necrotizing
enterocolitis
(NEC)
is
a
life-threatening
gastrointestinal
disorder
afflicting
preterm
infants,
which
currently
unpreventable.
Fecal
microbiota
transplantation
(FMT)
promising
preventive
therapy,
but
the
transfer
of
pathogenic
microbes
or
toxic
compounds
raise
concern.
Removal
bacteria
from
donor
feces
by
micropore
filtering
may
reduce
this
risk
bacterial
infection,
while
residual
bacteriophages
could
maintain
NEC-preventive
effects.
We
aimed
to
assess
preclinical
efficacy
and
safety
fecal
filtrate
(FFT).
Using
material
healthy
suckling
piglets,
we
compared
rectal
FMT
administration
(FMT,
n
=
16)
with
cognate
FFT
either
(FFTr,
14)
oro-gastric
(FFTo,
13)
saline
(CON,
in
preterm,
cesarean-delivered
piglets
as
models
for
infants.
assessed
gut
pathology
analyzed
mucosal
luminal
viral
composition
using
16S
rRNA
gene
amplicon
meta-virome
sequencing.
Finally,
used
isolated
ileal
mucosa,
coupled
RNA-Seq,
gauge
host
response
different
treatments.
Oro-gastric
completely
prevented
NEC,
was
confirmed
microscopy,
whereas
did
not
perform
better
than
control.
increased
diversity
reduced
Proteobacteria
relative
abundance
mucosa
An
induction
immunity
observed
FFT.
As
infants
are
extremely
vulnerable
infections,
rational
strategies
need
incontestable
profiles.
show
clinically
relevant
animal
model
that
FFT,
opposed
FMT,
efficiently
prevents
NEC
without
any
recognizable
side
Viral
infection
of
the
respiratory
tract
can
be
associated
with
propagating
effects
on
airway
microbiome,
and
microbiome
dysbiosis
may
influence
viral
disease.
Here,
we
investigated
in
coronavirus
disease
2019
(COVID-19)
its
relationship
to
severity,
systemic
immunologic
features,
outcomes.
We
examined
507
oropharyngeal,
nasopharyngeal,
endotracheal
samples
from
83
hospitalized
COVID-19
patients
as
well
non-COVID
healthy
controls.
Bacterial
communities
were
interrogated
using
16S
rRNA
gene
sequencing,
commensal
DNA
viruses
Anelloviridae
Redondoviridae
quantified
by
qPCR.
found
that
had
upper
greater
change
over
time
than
critically
ill
without
COVID-19.
Oropharyngeal
diversity
at
first
point
correlated
inversely
severity
during
hospitalization.
Microbiome
composition
was
also
immune
parameters
blood,
measured
lymphocyte/neutrophil
ratios
profiling
peripheral
blood
mononuclear
cells.
Intubated
showed
patient-specific
lung
frequently
highly
dynamic,
prominence
Staphylococcus.
more
frequent
colonization
higher
titers
severe
Machine
learning
analysis
demonstrated
integrated
features
early
sampling
points
high
power
discriminate
ultimate
level
severity.
Thus,
are
disturbed
correlate
parameters,
Future
studies
should
address
clinical
consequences
COVID-19,
possible
use
biomarkers,
role
bacterial
taxa
identified
here
pathogenesis.
IMPORTANCE
caused
acute
syndrome
2
(SARS-CoV-2)
tract,
results
variable
outcomes
ranging
minimal
illness
death,
but
reasons
for
this
not
understood.
small
each
markedly
abnormal
compared
people
differed
Early
tracked
reached
hospitalization,
blood.
These
findings
raise
questions
about
mechanisms
linking
SARS-CoV-2
other
microbial
inhabitants
airway,
including
whether
might
regulate
and/or
serve
biomarkers
Briefings in Bioinformatics,
Год журнала:
2022,
Номер
24(1)
Опубликована: Окт. 17, 2022
Bacteriophages
(or
phages),
which
infect
bacteria,
have
two
distinct
lifestyles:
virulent
and
temperate.
Predicting
the
lifestyle
of
phages
helps
decipher
their
interactions
with
bacterial
hosts,
aiding
phages'
applications
in
fields
such
as
phage
therapy.
Because
experimental
methods
for
annotating
cannot
keep
pace
fast
accumulation
sequenced
phages,
computational
method
predicting
lifestyles
has
become
an
attractive
alternative.
Despite
some
promising
results,
prediction
remains
difficult
because
limited
known
annotations
sheer
amount
contigs
assembled
from
metagenomic
data.
In
particular,
most
existing
tools
precisely
predict
short
contigs.
this
work,
we
develop
PhaTYP
(Phage
TYPe
tool)
to
improve
accuracy
on
We
design
different
training
tasks,
self-supervised
fine-tuning
overcome
difficulties.
rigorously
tested
compared
four
state-of-the-art
methods:
DeePhage,
PHACTS,
PhagePred
BACPHLIP.
The
results
show
that
outperforms
all
these
achieves
more
stable
performance
addition,
demonstrated
utility
analyzing
human
neonates'
gut
This
application
shows
is
a
useful
means
studying
data
extend
our
understanding
microbial
communities.
Nature Microbiology,
Год журнала:
2023,
Номер
8(5), С. 986 - 998
Опубликована: Апрель 10, 2023
Abstract
The
gut
microbiome
is
shaped
through
infancy
and
impacts
the
maturation
of
immune
system,
thus
protecting
against
chronic
disease
later
in
life.
Phages,
or
viruses
that
infect
bacteria,
modulate
bacterial
growth
by
lysis
lysogeny,
with
latter
being
especially
prominent
infant
gut.
Viral
metagenomes
(viromes)
are
difficult
to
analyse
because
they
span
uncharted
viral
diversity,
lacking
marker
genes
standardized
detection
methods.
Here
we
systematically
resolved
diversity
faecal
viromes
from
647
1-year-olds
belonging
Copenhagen
Prospective
Studies
on
Asthma
Childhood
2010,
an
unselected
Danish
cohort
healthy
mother–child
pairs.
By
assembly
curation
uncovered
10,000
species
248
virus
family-level
clades
(VFCs).
Most
(232
VFCs)
were
previously
unknown,
Caudoviricetes
class.
Hosts
determined
for
79%
phage
using
clustered
regularly
interspaced
short
palindromic
repeat
spacers
within
same
children.
Typical
Bacteroides
-infecting
crAssphages
outnumbered
undescribed
families
infecting
Clostridiales
Bifidobacterium
.
Phage
lifestyles
conserved
at
family
level,
33
virulent
118
temperate
families.
Virulent
phages
more
abundant,
while
ones
prevalent
diverse.
Together,
found
this
study
expand
existing
taxonomy
provide
a
resource
aiding
future
virome
research.