Frontiers in Aging Neuroscience,
Journal Year:
2021,
Volume and Issue:
13
Published: Feb. 12, 2021
Patients
with
Parkinson's
disease
(PD)
were
often
observed
gastrointestinal
symptoms,
which
preceded
the
onset
of
motor
symptoms.
Neuropathology
PD
has
also
been
found
in
enteric
nervous
system
(ENS).
Many
studies
have
reported
significant
PD-related
alterations
gut
microbiota.
This
meta-analysis
was
performed
to
evaluate
differences
microbiota
between
patients
and
healthy
controls
(HCs)
across
different
geographical
regions.
We
conducted
a
systematic
online
search
for
case-control
detecting
HCs.
Mean
difference
(MD)
95%
confidence
interval
(CI)
calculated
access
abundance
certain
families
PD.
Fifteen
included
this
study.
Our
results
showed
lower
levels
Prevotellaceae
(MD
=
−0.37,
CI
−0.62
−0.11),
Faecalibacterium
−0.41,
CI:
−0.57
−0.24),
Lachnospiraceae
−0.34,
−0.59
−0.09)
compared
Significant
higher
level
Bifidobacteriaceae
0.38,
95%;
0.12
0.63),
Ruminococcaceae
0.58,
0.07
1.10),
Verrucomicrobiaceae
0.45,
0.21
0.69),
Christensenellaceae
0.20,
0.34)
Thus,
shared
detected
These
dysbiosis
might
lead
impairment
short-chain
fatty
acids
(SCFAs)
producing
process,
lipid
metabolism,
immunoregulatory
function,
intestinal
permeability,
contribute
pathogenesis
Biomedicine & Pharmacotherapy,
Journal Year:
2021,
Volume and Issue:
139, P. 111661 - 111661
Published: May 8, 2021
During
the
past
decade,
accumulating
evidence
from
research
highlights
suggested
effects
of
bacterial
communities
human
gut
microbiota
and
their
metabolites
on
health
disease.
In
this
regard,
microbiota-derived
receptors,
beyond
immune
system,
maintain
metabolism
homeostasis,
which
is
essential
to
host's
by
balancing
utilization
intake
nutrients.
It
has
been
shown
that
dysbiosis
can
cause
pathology
altered
metabolites'
formation,
resulting
in
dysregulation
system
metabolism.
The
short-chain
fatty
acids
(SCFAs),
such
as
butyrate,
acetate,
succinate,
are
produced
due
fermentation
process
bacteria
gut.
noted
remodeling
associated
with
pathophysiology
several
neurological
disorders,
Alzheimer's
disease,
multiple
sclerosis,
Parkinson's
amyotrophic
lateral
stress,
anxiety,
depression,
autism,
vascular
dementia,
schizophrenia,
stroke,
neuromyelitis
optica
spectrum
among
others.
This
review
will
discuss
current
most
significant
studies
dealing
some
SCFAs
microbial
selected
disorders.
Nutrients,
Journal Year:
2018,
Volume and Issue:
10(6), P. 708 - 708
Published: June 1, 2018
In
recent
years
evidence
has
emerged
that
neurodegenerative
diseases
(NDs)
are
strongly
associated
with
the
microbiome
composition
in
gut.
Parkinson’s
disease
(PD)
is
most
intensively
studied
this
context.
review,
we
performed
a
systematic
evaluation
of
published
literature
comparing
changes
colonic
PD
to
ones
observed
other
NDs
including
Alzheimer’s
(AD),
multiple
system
atrophy
(MSA),
sclerosis
(MS),
neuromyelitis
optica
(NMO)
and
amyotrophic
lateral
(ALS).
To
enhance
comparability
different
studies,
only
human
case-control
studies
were
included.
Several
showed
an
increase
Lactobacillus,
Bifidobacterium,
Verrucomicrobiaceae
Akkermansia
PD.
A
decrease
Faecalibacterium
spp.,
Coprococcus
Blautia
Prevotella
spp.
Prevotellaceae
was
On
low
taxonomic
resolution,
like
phylum
level,
not
disease-specific
inconsistent.
However,
on
higher
resolution
genus
or
species
minor
overlap
between
MSA,
both
alpha
synucleinopathies.
We
show
standardization
sample
collection
analysis
necessary
for
ensuring
reproducibility
data.
also
provide
assessing
microbiota
at
high
reveals
relative
abundance
may
be
specific
characteristic
one
group,
might
evolve
discriminative
power.
The
interactions
bacterial
strains
co-abundances
must
investigated
before
assumptions
about
effects
bacteria
host
can
made
certainty.
Frontiers in Integrative Neuroscience,
Journal Year:
2018,
Volume and Issue:
12
Published: Sept. 11, 2018
Mental
disorders
and
neurological
diseases
have
brought
rapidly
increasing
medical
burdens.
Although
extensive
researches
been
conducted
hugely,
effective
therapies
still
progressing
slowly.
Current
dilemma
reminds
us
that
the
human
is
a
superorganism.
Only
if
we
take
self
its
partner
microbiota
into
consideration
at
same
time
can
better
understand
these
diseases.
Over
last
few
centuries,
has
experienced
tremendous
changes
much
more
than
own
genes
because
of
modern
transformations
in
diet,
lifestyle,
care,
so
on,
paralleling
epidemiological
transition.
Existing
research
indicates
gut
plays
an
important
role
this
According
to
gut–brain
psychology,
crucial
part
gut–brain,
it
communicates
with
brain
via
microbiota–gut–brain
axis.
The
almost
develops
synchronously
brain,
mind.
Gut
influences
various
normal
mental
processes
phenomena
they
are
involved
pathophysiology
numerous
Targeting
therapy
for
promising
approach
supported
by
three
theories:
hypothesis,
"old
friend"
leaky
theory.
effects
behavior
fulfilled
through
microbiota-gut-brain
axis
which
mainly
composed
nervous
pathway,
endocrine
immune
pathway.
Undoubtedly,
psychology
will
bring
great
enhancement
neuroscience,
psychiatry.
Various
improving
methods
including
FMT,
probiotics,
prebiotics,
healthy
lifestyle
shown
capability
promote
function
brain.
Harnessing
improve
health,
prevent
related
be
true
future.
PLoS ONE,
Journal Year:
2017,
Volume and Issue:
12(11), P. e0187307 - e0187307
Published: Nov. 1, 2017
Background
We
previously
reported
gut
dysbiosis
in
patients
with
Parkinson’s
disease
(PD).
Objective
The
aim
of
this
study
is
to
examine
whether
correlates
the
progression
PD.
Methods
examined
changes
microbiota
and
demographic
features
2
years
36
PD
patients.
Results
A
change
total
UPDRS
scores
was
predicted
by
counts
Bifidobacterium
Atopobium
cluster
at
year
0
a
correlation
coefficient
0.52.
Correlation
analysis
additionally
revealed
that
low
Bacteroides
fragilis
were
associated
worsening
I
years.
In
addition,
hallucinations/delusions
Similarly,
B.
motivation/initiative
evenly
divided
into
deteriorated
stable
groups
based
on
degree
scores.
group
had
lower
Bifidobacterium,
fragilis,
Clostridium
leptium
than
but
not
2,
suggesting
may
demonstrate
accelerated
lowering
these
bacteria
0.
Conclusions
intestinal
bacterial
decrease
course
progression.
Temporal
profiles
are
likely
be
different
from
bacteria,
also
between
deteriorating
groups,
which
able
exploited
differentiate
rapidly
slowly
progressive
pathology.
mSystems,
Journal Year:
2020,
Volume and Issue:
5(5)
Published: Sept. 14, 2020
Parkinson's
disease
is
a
neurodegenerative
disorder
characterized
by
the
accumulation
of
intracellular
aggregates
misfolded
alpha-synuclein
along
cerebral
axis.
Several
studies
report
association
between
intestinal
dysbiosis
and
disease,
although
cause-effect
relationship
remains
to
be
established.
Herein,
gut
microbiota
composition
64
Italian
patients
with
51
controls
was
determined
using
next-generation
sequencing
approach.
A
real
metagenomics
shape
based
on
gas
chromatography-mass
spectrometry
also
investigated.
The
most
significant
changes
within
group
highlighted
reduction
in
bacterial
taxa,
which
are
linked
anti-inflammatory/neuroprotective
effects,
particularly
Lachnospiraceae
family
key
members,
such
as
Butyrivibrio,
Pseudobutyrivibrio,
Coprococcus,
Blautia
direct
evaluation
fecal
metabolites
revealed
several
classes
metabolites.
Changes
were
seen
lipids
(linoleic
acid,
oleic
succinic
sebacic
acid),
vitamins
(pantothenic
acid
nicotinic
amino
acids
(isoleucine,
leucine,
phenylalanine,
glutamic
pyroglutamic
acid)
other
organic
compounds
(cadaverine,
ethanolamine,
hydroxy
propionic
acid).
Most
modified
strongly
correlated
abundance
members
belonging
family,
suggesting
that
these
bacteria
correlate
altered
metabolism
rates
disease.IMPORTANCE
To
our
knowledge,
this
one
few
thus
far
correlates
analysis
disease.
Overall,
data
highlight
modifications
numerous
This
suggests
associated
dysregulation
involves
synergistic
microbes
favoring
homeostasis.
Interestingly,
short-chain
fatty
(SCFA)-producing
influenced
metabolomics
profile,
affecting
potential
protective
effects
Parkinson
group.
On
hand,
extensive
impact
has
at
level
metabolic
pathways
could
encourage
identification
specific
biomarkers
for
diagnosis
treatment
light
effect
drugs
have
microbiota.
Molecular Neurodegeneration,
Journal Year:
2022,
Volume and Issue:
17(1)
Published: March 5, 2022
The
implication
of
gut
microbiota
in
the
control
brain
functions
health
and
disease
is
a
novel,
currently
emerging
concept.
Accumulating
data
suggest
that
exert
its
action
at
least
part
by
modulating
neuroinflammation.
Given
link
between
neuroinflammatory
changes
neuronal
activity,
it
plausible
may
affect
indirectly
impacting
microglia,
key
player
Indeed,
increasing
evidence
suggests
interplay
microglia
synaptic
dysfunction
involve
microbiota,
among
other
factors.
In
addition
to
these
indirect
microglia-dependent
actions
on
has
been
recently
recognized
could
also
activity
directly
stimulation
vagus
nerve.
npj Parkinson s Disease,
Journal Year:
2020,
Volume and Issue:
6(1)
Published: June 12, 2020
Abstract
In
Parkinson’s
disease
(PD),
gastrointestinal
features
are
common
and
often
precede
the
motor
signs.
Braak
colleagues
proposed
that
PD
may
start
in
gut,
triggered
by
a
pathogen,
spread
to
brain.
Numerous
studies
have
examined
gut
microbiome
PD;
all
found
it
be
altered,
but
inconsistent
results
on
associated
microorganisms.
Studies
date
been
small
(
N
=
20
306)
difficult
compare
or
combine
due
varied
methodology.
We
conducted
microbiome-wide
association
study
(MWAS)
with
two
large
datasets
for
internal
replication
333
507).
used
uniform
methodology
when
possible,
interrogated
confounders,
applied
statistical
tests
concordance,
followed
correlation
network
analysis
infer
interactions.
Fifteen
genera
were
at
significance
level,
both
datasets,
methods,
without
covariate
adjustment.
The
associations
not
independent,
rather
they
represented
three
clusters
of
co-occurring
Cluster
1
was
composed
opportunistic
pathogens
elevated
PD.
2
short-chain
fatty
acid
(SCFA)-producing
bacteria
reduced
3
carbohydrate-metabolizing
probiotics
Depletion
anti-inflammatory
SCFA-producing
levels
confirmatory.
Overabundance
is
an
original
finding
their
identity
provides
lead
experimentally
test
role