Journal of Alzheimer s Disease,
Journal Year:
2024,
Volume and Issue:
102(1), P. 99 - 109
Published: Oct. 15, 2024
Recent
research
suggests
that
selective
serotonin
reuptake
inhibitors
(SSRIs)
may
reduce
mortality
in
COVID-19
patients;
however,
into
their
benefits
for
elderly
Alzheimer's
disease
(AD)
patients
remains
limited.
Computational and Structural Biotechnology Journal,
Journal Year:
2024,
Volume and Issue:
24, P. 115 - 125
Published: Jan. 9, 2024
BackgroundPost-acute
sequelae
of
COVID-19
(PASC)
produce
significant
morbidity,
prompting
evaluation
interventions
that
might
lower
risk.
Selective
serotonin
reuptake
inhibitors
(SSRIs)
potentially
could
modulate
risk
PASC
via
their
central,
hypothesized
immunomodulatory,
and/or
antiplatelet
properties
although
clinical
trial
data
are
lacking.Materials
and
MethodsThis
retrospective
study
was
conducted
leveraging
real-world
within
the
National
COVID
Cohort
Collaborative
(N3C)
to
evaluate
whether
SSRIs
with
agonist
activity
at
sigma-1
receptor
(S1R)
PASC,
since
agonism
this
may
serve
as
a
mechanism
by
which
attenuate
an
inflammatory
response.
Additionally,
determine
potential
benefit
be
traced
S1R
agonism.
Presumed
defined
based
on
computable
phenotype
trained
U09.9
ICD-10
diagnosis
code.ResultsOf
17,908
patients
identified,
1521
were
exposed
baseline
SSRI,
1803
non-S1R
14,584
neither.
Using
inverse
probability
weighting
Poisson
regression,
relative
(RR)
assessed.A
29%
reduction
in
RR
(0.704
[95%
CI,
0.58-0.85];
P
=
4
×10-4)
seen
among
who
received
SSRI
compared
unexposed
21%
those
receiving
without
(0.79
0.67
-
0.93];
0.005).Thus,
reported
associated
decrease
PASC.
medRxiv (Cold Spring Harbor Laboratory),
Journal Year:
2024,
Volume and Issue:
unknown
Published: Feb. 6, 2024
ABSTRACT
Background
Long
COVID,
also
known
as
post-acute
sequelae
of
COVID-19
(PASC),
is
a
poorly
understood
condition
with
symptoms
across
range
biological
domains
that
often
have
debilitating
consequences.
Some
recently
suggested
lingering
SARS-CoV-2
virus
in
the
gut
may
impede
serotonin
production
and
low
drive
many
COVID
systems.
Therefore,
selective
reuptake
inhibitors
(SSRIs),
which
increase
synaptic
availability,
prevent
or
treat
COVID.
SSRIs
are
commonly
prescribed
for
depression,
therefore
restricting
study
sample
to
only
include
patients
depression
can
reduce
concern
confounding
by
indication.
Methods
In
an
observational
electronic
health
records
from
National
Cohort
Collaborative
(N3C)
diagnosis
between
September
1,
2021,
December
2022,
pre-existing
major
depressive
disorder,
leading
indication
SSRI
use,
we
evaluated
relationship
use
at
time
infection
subsequent
12-month
risk
(defined
ICD-10
code
U09.9).
We
defined
prescription
medication
beginning
least
30
days
before
not
ending
infection.
To
minimize
bias,
estimated
causal
associations
interest
using
nonparametric
approach,
targeted
maximum
likelihood
estimation,
aggressively
adjust
high-dimensional
covariates.
Results
analyzed
(
n
=
506,903)
disorder
diagnosis,
where
124,928
(25%)
were
SSRI.
found
users
had
significantly
lower
compared
nonusers
(adjusted
relative
0.90,
95%
CI
(0.86,
0.94)).
Conclusion
These
findings
suggest
during
be
protective
against
supporting
hypothesis
key
mechanistic
biomarker
Medical alphabet,
Journal Year:
2025,
Volume and Issue:
34, P. 36 - 41
Published: Jan. 24, 2025
Post-infectious
irritable
bowel
syndrome
(PI–IBS)
is
the
first
phenotype
of
disease
described
in
literature
and
most
studied
to
date.
The
prevalence
PI–IBS
population
continues
grow
steadily
especially
post-COVID-19
pandemic
period.
Taking
into
account
accumulated
scientific
clinical
data
dysfunction
functional
axis
«microbiota-gut-brain»
associated
with
formation
visceral
hypersensitivity
intestinal
motor
disorders
due
abnormal
serotonin
metabolism,
increased
permeability
low-grade
inflammation
considered
as
a
key
pathogenetic
factor
underlying
development
persistence
symptoms.
This
review
article
analyzes
summarizes
information
on
mechanisms
changes
neurohumoral
regulation,
well
qualitative
quantitative
composition
microbiota.
In
addition,
possibility
using
probiotic
therapy
complex
patients
are
presented.
Frontiers in Neurology,
Journal Year:
2025,
Volume and Issue:
16
Published: Feb. 13, 2025
This
opinion
article
attempts
to
connect
knowledge
about
post-Covid
syndrome
(PCS)
gained
in
neuropsychiatry
and
immunology.
It
discusses
some
misunderstandings
PCS
light
of
the
interplay
between
serotonergic
system
kynurenine
pathway
(KP).
From
a
new
perspective,
potential
biomarkers
for
further
research
therapeutic
targets
are
identified.Due
severity
extent
PCS,
researchers
urgently
searching
its
causes
treatments.
For
neurocognitive
autonomic
nervous
problems
such
as
present
it
is
common
encounter
dysregulated
neurotransmitter
systems.
Among
neurotransmitters,
serotonin
plays
special
role
immune
regulating
inflammatory
responses
by
central
peripheral
mechanisms
(1)(2)(3)(4)(5).
Serotonin
-also
known
5-hydroxytryptamine
(5-HT)
-is
with
stimulating
effect
that
influences
memory,
mood,
selfconfidence,
sleep,
emotion,
orgasm
eating
(6)(7)(8)(9).Serotonin
not
only
binds
receptors
on
neurons,
but
also
cells
(3,5,10,11).
Many
studies
have
indicate
receptors,
especially
5-HT3
(one
receptors),
involved
pathogenesis
chronic
conditions
(5,10,11).
Therapeutic
applications
receptor
antagonists
instance
been
reported
rheumatoid
arthritis
(5,11,12).
An
essential
amino
acid
KP
tryptophan,
precursor
both
(see
figure1),
we
get
through
food
part
regular
diet
(13).
The
creating
an
important
energy
factor
modulated
infection
stress
(1,5)and
subsets
T
helper
17
(Th17
cells)
produce
cytokines
signaling
function
(14).Strong
alterations
intestinal
gene
expression
upregulate
genes
viral
recognition
inflammation
pathways
downregulate
nutrient
metabolism,
like
tryptophan
(15).
downregulation
result
serum
reduction
Various
suspect
this
might
be
cause
complaints
(15)(16)(17)(18)(19).In
I
address
question
whether
disruptions
serotonin-and
metabolism
lead
treatment
PCS.In
study
'Serotonin
post-acute
sequelae
infection'
Wong
et
al.
(15)
they
investigated
four
human
cohorts,
animal
models
organoid
cultures.
First,
conducted
among
1540
patients
who
presented
center
severe
complaints.
They
identified
eight
clusters
based
clinical
symptoms,
varying
from
mainly
physical
problems,
loss
strength
muscles,
memory
disorders.
performed
targeted
plasma
metabolomics
58
representative
3-22
months
after
found
compared
30
healthy
controls.For
finding
three
causes:
a)
diminished
absorption
tryptophan.
Because
angiotensin
converting
enzyme
(ACE2)
these
strongly
decreased.
Furthermore,
COVID-19
virus
spike
proteins
attaches
(20,21).
As
consequence,
during
infection,
has
compete
over
reduced
number
ACE2
receptors;
b)
micro-clots
thrombocytes.
Thrombocytes
contain
serotonin.
reduce
thrombocytes
thus
availability
serotonin;
c)
enhanced
monoamine
oxidase
(MAO)
promotes
breakdown
serotonin.In
Sadlier
(17),
cohort
20
hospitalized
were
controls,
4-6
6-9
infection.
Levels
multiple
metabolites
immunomodulatory
properties
elevated
quinolinate,
toxic
metabolite.
There
levels
other
things
glutamate
(a
neurotransmitter)
level
was
increased.Su
(18)
longitudinal
multi-omic
analysis
(n=209).
followed
immediately
Covid-19
had
less
symptoms.
measured
autoantibodies,
specific
RNAemia,
metabolic
profiles,
global
proteomic
blood
mononuclear
(PBMCs)
draws.
no
457
controls.
What
striking
stands
out
reporting
neurological
symptoms
exhibited
associated
negative
regulation
circadian
sleep/wake
cycle.
hormone
melatonin
responsible
produced
brain
(in
pineal
gland)
serotonin.Wong
conclude
serious
greater
chance
permanently
retaining
than
mild
checked
Peluso
(22)
did
indeed
negatively
correlate
complaints.However,
retrospective
Mathé
(19)
using
Liquid
Chromatography
-Mass
Spectrometry
(lc-ms/ms)
technology
34
at
least
6
complaints,
which
14
controls.Although
colleagues
much
more
extensive
most
comprehensive
all
interesting
results,
agree
conclusion
reliable
biomarker
should
used
routine
diagnostic
assessment,
two
arguments.The
first
reason
cannot
cross
blood-brain
barrier
appears
reaches
via
cranial
nerve,
vagus
nerve
normally
uses
Acetylcholine
(Ach)
(9).
So,
directly
related
brain.
Based
models,
assume
PCS.
In
vivo,
however,
technically
very
difficult
measure
With
possible
techniques
(microdialysis,
functional
magnetic
resonance
imaging
(fMRI),
fast-scan
cyclic
voltammetry
(FSCV),
genetically
encoded
indicators
(GESIs)
positron
emission
tomography
(PET)
either
spatiotemporal
resolution
too
poor
or
technique
invasive
or/and
expensive
.However,
vivo
you
(23).
authorsWong
can
move
up
hippocampus,
control
causing
disorders
our
describe
into
95
selective
reuptake
inhibitors
(SSRIs)
'Treatment
SSRIs'
(
16),
give
however
another
explanation.
We
hypothesize
occurs
brainstem
After
all,
pons
origin
serotoninergic
there,
axons
sent
throughout
(CNS)
(6,7).
afferent
arises
(6,7)
full
attach
(20).
Hypometabolic
areas
(24,25).Further
corroboration
argument
rRecent
Besteher
(26)
confirms
argument.
fMRI
scans
suffering
neuropsychiatric
(n
=
30)
significantly
larger
gray
matter
volumes
(GMV)
controls
20).
Such
example
prefrontal
cortex
(PFC)
-which
range
higher
order
cognitive
functions
limbic
(27).
predominates
(27,28).
authors
state
enlargement
GMV
could
sign
recovery
neurogenesis
compensation
(26).
However,
Another
explanation
cerebral
swelling
caused
reactions.Using
PET
-for
transmission
systems
-researchers
see
exactly
what
happening
enlarged
Given
persist,
seems
likely
pathology.
Moreover,
provides
plausible
positive
SSRIs
when
there
something
wrong
balance
those
regions
(16).Furthermore,
Su
melatonin,
serotonin,
reduced.
additional
support-contrary
-that
may
reduced.The
second
reject
biomarker,
variability
degree
variable
cohorts
different
(15,(17)(18)(19).
probably
many
variables
studies.
as:
time
passed
measurement:
ranging
0
22
months,
their
exact
quantification
(especially
subjective
complaints)
subgroups
belonged
cohort.
believe
methodology
therefore
results
vary
research.Unlike
(9,13)
better
option
(14,16).
expected
if
instead
levels,
case
comparative
above
preferably
comparable.Beside
given
colleagues,
fourth
cause:
KP,
create
nicotinamide
adenine
dinucleotide
(NAD+),
interacts
extensively
system,
activated
(14,(29)(30)(31).
formation
process
demands
lot
14)
figure1)
because
deficiency
(9).In
study,
decline
lasted
longer.
Therefore,
major
reduction.
Guo
(30)
show
persistently
INDO-2,
stimulates
production
(figure
1).
Cron
(14)
(such
quinoline),
while
depleted.
Additionally,
Cysique
significant
relationship
impairment
(29).
These
overactivity
KP.
active
left
Figure
1
2.4.
overactive
deficiencies
hormones
neurotransmitters
illustrates
too.
regulates
cycle
(17,32).
sleep
(16,33).Too
due
runaway
feedback
loop
blocks
tetrahydrobiopterin
(BH4),
coenzyme
dopamine,
turn
ensures
(nor)epinephrine
Norepinephrine
sympathetic
increases
frequency
force
muscle
contractions
(34)why
symptom
SNRI
(selective
norepinephrine
inhibitor)
SSRI
(16).If
look
metabolites,
quinolinic
glutaminergic
antagonists.
accumulation
(35)
leads
various
concentration
palpitations
(35),
often
suffer
(16,33).
That
why
recommend
(16)
Nacetylcysteine
drug
restore
(35).
(36).
stimulatesexcept
besides
pathological
propose
would
preferable
choose
5-hydroxytryptophan
(5-HTP,
confused
5-HT)5hydroxytryptophan)
5-HTP
direct
does
feed
barrier.
2.5.2.
reduces
-to
lesser
-norepinephrine
presynaptic
neuron
allows
synapse
transmit
signal
postsynaptic
longer
period
Normally
usually
described
depression
anxiety
(37).Wong
mice
treated
fluoxetine
(an
SSRI)
improved
Previously,
several
took
SSRIs,
lower
developing
(38)(39)(40)(41)(42)(43).In
exploratory
thirds
PCS-patients
showed
considerable
even
strong
being
(16).
confirmed
hypothesis
regarding
importance
formulated
seven
action
one
hypothetical
mechanism.
short:
,
short.
instance,
a.
influence
hypothalamic
-pituitary
-adrenalaxis
(HPA-axis,
system)
(44-51),
b.
circulatory
(52,53),
c.
.
Bby
prolonging
clotting
theoretically
help
dissolve
microclots
(54),
d.
oxidative
e.
tThe
fluvoxamine
shown
extra
anti-inflammatory
effects
inhibiting
sphingomyelinase
(ASM)
(55),
f.
pro-inflammatory
interleukin
2
(IL
2)
IL
CNS
(56)
-in
achieve
effects,
must
then
sigma1
agonist
receptor)
(56),.
g.
stimulate
hippocampus
(9,57).
Finally,
slow
down
(9).Disruptions
-and
provide
clear
direction
advancing
line
inquiry.
literature
noticed
While
evident
scientists
explore
focus
route
(14,(29)(30)(31)
(15,(17)(18)(19)36),
typically
overlook
possibility
routes
related,
regard
pathology
overlooked.Additionally,
sSerotonin
assessment
turned
(15,(17)(18)(19)22).
Tryptophan
option.
comparable.Toxic
good
well,
(29).Wong
advised
do
examine
(15)(16)(17)36).
A
randomized
controlled
trial
(RCT)
follow
under
strict
conditions,
testing
pharmacogenetic
profile
advance,
since
absorb
break
quickly
slowly
lack
desired
side
effects.
excluded
RCT
outside
context
RCT.
sensitive
stop
increasing
dosage
threatens
tip
without
affecting
requirements
RCT.Furthermore
recommended
Therefore
option.This
review
call
collaboration
immunologists,
neurologists
psychiatrists
field
neuroimmunology.
already
examples
psychiatric
diseases
immunologically,
schizophrenia
(58)(59)(60)(61)(62),
childhood
(61,63,64)
still
unravel
neuroimmunology
immunological
psychotropic
drugs
considered.
(KP)
same
building
block
system.
From:
Treatment
European Archives of Psychiatry and Clinical Neuroscience,
Journal Year:
2025,
Volume and Issue:
unknown
Published: Feb. 28, 2025
Abstract
Objective
Subjective
cognitive
impairment
is
frequently
reported
by
patients
experiencing
Post-COVID
symptoms.
This
study
aims
to
assess
objective
in
attention,
memory,
and
executive
functions
among
these
patients.
Further,
we
investigated
potential
determinants
of
impairment.
Methods
In
this
cross-sectional
study,
standardized
neuropsychological
testing
(Vienna
Testing
System),
assessment
symptom
aggravation,
psychiatric
anamnesis,
psychometrics
(BDI-II,
Fatigue
Severity
Scale)
were
conducted
229
who
voluntarily
presented
our
outpatient
memory-clinic
due
subjective
following
COVID-19.
Blood-samples
collected
peripheral
immune
markers
(IL-6,
CRP)
APOE-ε4
genotype.
Results
at
least
one
domain
was
present
39%
the
47%
showed
symptoms
moderate
or
severe
depression.
The
APOE
-ε4
allele
32%
Higher
rates
depressive
(OR
=
1.41,
95%-CI
1.02–1.95)
higher
burden
3.29,
1.51–7.40)
predicted
impairment,
regardless
age,
sex,
years
formal
education,
time
since
infection,
medication
for
diabetes
hypertension.
severity,
acute
COVID-19
severity
inflammation
had
no
impact.
Conclusions
more
likely
associated
with
high
depression
rather
than
relatively
low
performance.
Thus,
emphasizes
necessity
extensive
evaluation
when
examining
clinical
practice.
link
between
does
not
appear
be
specific
Therefore,
depression-
APOE-ε4-mediated
neurodegenerative
pathomechanisms
might
a
promising
therapeutical
target.
Life,
Journal Year:
2025,
Volume and Issue:
15(3), P. 439 - 439
Published: March 11, 2025
The
COVID-19
(C-19)
pandemic
has
highlighted
the
significance
of
understanding
long-term
effects
this
disease
on
quality
life
those
infected.
Long
(L-C19)
presents
as
persistent
symptoms
that
continue
beyond
main
illness
period,
usually
lasting
weeks
to
years.
One
lesser-known
but
significant
aspects
L-C19
is
its
impact
neuropsychiatric
manifestations,
which
can
have
a
profound
effect
an
individual’s
life.
Research
shows
creates
issues
such
mental
fog,
emotional
problems,
and
brain
symptoms,
along
with
sleep
changes,
extreme
fatigue,
severe
head
pain,
tremors
seizures,
pain
in
nerves.
People
cognitive
problems
plus
fatigue
mood
disorders
experience
great
difficulty
handling
everyday
activities,
personal
hygiene,
social
interactions.
Neuropsychiatric
make
people
withdraw
from
activity
hurt
relationships,
thus
causing
feelings
loneliness.
unpredictable
state
generates
heavy
psychological
pressure
through
suffering,
including
depression
anxiety.
changes
impairment,
swings
it
hard
for
work
or
study
effectively,
decreases
their
output
at
school
lowers
job
contentment.
purpose
narrative
review
summarize
clinical
data
present
literature
regarding
manifestations
L-C19,
identify
current
methods
diagnosis
treatment
lead
correct
management
condition,
highlight
these
patients’