Science Signaling,
Journal Year:
2023,
Volume and Issue:
16(784)
Published: May 9, 2023
Although
largely
confined
to
the
airways,
SARS-CoV-2
infection
has
been
associated
with
sensory
abnormalities
that
manifest
in
both
acute
and
chronic
phenotypes.
To
gain
insight
on
molecular
basis
of
these
abnormalities,
we
used
golden
hamster
model
characterize
compare
effects
influenza
A
virus
(IAV)
nervous
system.
We
detected
transcripts
but
no
infectious
material
cervical
thoracic
spinal
cord
dorsal
root
ganglia
(DRGs)
within
first
24
hours
intranasal
infection.
SARS-CoV-2–infected
hamsters
exhibited
mechanical
hypersensitivity
was
milder
prolonged
compared
observed
IAV-infected
hamsters.
RNA
sequencing
analysis
DRGs
1
4
days
after
suggested
perturbations
predominantly
neuronal
signaling
animals
as
opposed
type
I
interferon
animals.
Later,
31
infection,
a
neuropathic
transcriptome
emerged
from
animals,
which
coincided
SARS-CoV-2–specific
hypersensitivity.
These
data
revealed
potential
targets
for
pain
management,
including
binding
protein
ILF3,
validated
murine
models.
This
work
elucidates
transcriptomic
signatures
triggered
by
may
underlie
short-
long-term
abnormalities.
Neuron,
Journal Year:
2022,
Volume and Issue:
110(21), P. 3484 - 3496
Published: Oct. 7, 2022
Persistent
neurological
and
neuropsychiatric
symptoms
affect
a
substantial
fraction
of
people
after
COVID-19
represent
major
component
the
post-acute
syndrome,
also
known
as
long
COVID.
Here,
we
review
what
is
understood
about
pathobiology
impact
on
CNS
discuss
possible
neurobiological
underpinnings
cognitive
affecting
survivors.
We
propose
chief
mechanisms
that
may
contribute
to
this
emerging
health
crisis.
Frontiers in Medicine,
Journal Year:
2023,
Volume and Issue:
10
Published: June 2, 2023
Some
patients
remain
unwell
for
months
after
"recovering"
from
acute
COVID-19.
They
develop
persistent
fatigue,
cognitive
problems,
headaches,
disrupted
sleep,
myalgias
and
arthralgias,
post-exertional
malaise,
orthostatic
intolerance
other
symptoms
that
greatly
interfere
with
their
ability
to
function
can
leave
some
people
housebound
disabled.
The
illness
(Long
COVID)
is
similar
myalgic
encephalomyelitis/chronic
fatigue
syndrome
(ME/CFS)
as
well
persisting
illnesses
follow
a
wide
variety
of
infectious
agents
following
major
traumatic
injury.
Together,
these
are
projected
cost
the
U.S.
trillions
dollars.
In
this
review,
we
first
compare
ME/CFS
Long
COVID,
noting
considerable
similarities
few
differences.
We
then
in
extensive
detail
underlying
pathophysiology
two
conditions,
focusing
on
abnormalities
central
autonomic
nervous
system,
lungs,
heart,
vasculature,
immune
gut
microbiome,
energy
metabolism
redox
balance.
This
comparison
highlights
how
strong
evidence
each
abnormality,
illness,
helps
set
priorities
future
investigation.
review
provides
current
road
map
literature
biology
both
illnesses.
Nature Communications,
Journal Year:
2024,
Volume and Issue:
15(1)
Published: Jan. 4, 2024
A
subgroup
of
patients
infected
with
SARS-CoV-2
remain
symptomatic
over
three
months
after
infection.
distinctive
symptom
long
COVID
is
post-exertional
malaise,
which
associated
a
worsening
fatigue-
and
pain-related
symptoms
acute
mental
or
physical
exercise,
but
its
underlying
pathophysiology
unclear.
With
this
longitudinal
case-control
study
(NCT05225688),
we
provide
new
insights
into
the
malaise
in
COVID.
We
show
that
skeletal
muscle
structure
lower
exercise
capacity
patients,
local
systemic
metabolic
disturbances,
severe
exercise-induced
myopathy
tissue
infiltration
amyloid-containing
deposits
muscles
worsen
induction
malaise.
This
highlights
novel
pathways
help
to
understand
suffering
from
other
post-infectious
diseases.
COVID-19,
with
persistent
and
new
onset
of
symptoms
such
as
fatigue,
post-exertional
malaise,
cognitive
dysfunction
that
last
for
months
impact
everyday
functioning,
is
referred
to
Long
COVID
under
the
general
category
post-acute
sequelae
SARS-CoV-2
infection
(PASC).
PASC
highly
heterogenous
may
be
associated
multisystem
tissue
damage/dysfunction
including
acute
encephalitis,
cardiopulmonary
syndromes,
fibrosis,
hepatobiliary
damages,
gastrointestinal
dysregulation,
myocardial
infarction,
neuromuscular
neuropsychiatric
disorders,
pulmonary
damage,
renal
failure,
stroke,
vascular
endothelial
dysregulation.
A
better
understanding
pathophysiologic
mechanisms
underlying
essential
guide
prevention
treatment.
This
review
addresses
potential
hypotheses
connect
long-term
health
consequences.
Comparisons
between
other
virus-initiated
chronic
syndromes
myalgic
encephalomyelitis/chronic
fatigue
syndrome
postural
orthostatic
tachycardia
will
addressed.
Aligning
identifying
potentially
regulated
common
underlining
pathways
necessary
true
nature
PASC.
The
discussed
contributors
include
from
injury
one
or
more
organs,
reservoirs
replicating
virus
its
remnants
in
several
tissues,
re-activation
latent
pathogens
Epstein-Barr
herpes
viruses
COVID-19
immune-dysregulated
environment,
interactions
host
microbiome/virome
communities,
clotting/coagulation
dysfunctional
brainstem/vagus
nerve
signaling,
dysautonomia
autonomic
dysfunction,
ongoing
activity
primed
immune
cells,
autoimmunity
due
molecular
mimicry
pathogen
proteins.
individualized
suggests
different
therapeutic
approaches
required
best
manage
specific
patients.
Science Translational Medicine,
Journal Year:
2023,
Volume and Issue:
15(708)
Published: Aug. 9, 2023
Severe
acute
respiratory
syndrome
coronavirus
2
(SARS-CoV-2)
viral
proteins
bind
to
host
mitochondrial
proteins,
likely
inhibiting
oxidative
phosphorylation
(OXPHOS)
and
stimulating
glycolysis.
We
analyzed
gene
expression
in
nasopharyngeal
autopsy
tissues
from
patients
with
disease
2019
(COVID-19).
In
samples
declining
titers,
the
virus
blocked
transcription
of
a
subset
nuclear
DNA
(nDNA)–encoded
OXPHOS
genes,
induced
microRNA
2392,
activated
HIF-1α
induce
glycolysis,
immune
defenses
including
integrated
stress
response.
COVID-19,
SARS-CoV-2
was
no
longer
present,
had
recovered
lungs.
However,
nDNA
remained
suppressed
tissue
heart
and,
lesser
extent,
kidney,
liver,
whereas
host-immune
defense
pathways
were
activated.
During
early
infection
hamsters
peak
lung
load,
minimally
perturbed
but
down-regulated
cerebellum
up-regulated
striatum
even
though
detected
brain.
mid-phase
mice,
starting
recover
mouse
These
data
suggest
that
when
titer
first
peaks,
there
is
systemic
response
followed
by
suppression
induction
glycolysis
leading
deployment
antiviral
defenses.
Even
cleared
function
recovered,
heart,
lymph
nodes
impaired,
potentially
severe
COVID-19
pathology.
Cell Reports,
Journal Year:
2023,
Volume and Issue:
42(3), P. 112189 - 112189
Published: Feb. 17, 2023
Cognitive
dysfunction
is
often
reported
in
patients
with
post-coronavirus
disease
2019
(COVID-19)
syndrome,
but
its
underlying
mechanisms
are
not
completely
understood.
Evidence
suggests
that
severe
acute
respiratory
syndrome
coronavirus
2
(SARS-CoV-2)
Spike
protein
or
fragments
released
from
cells
during
infection,
reaching
different
tissues,
including
the
CNS,
irrespective
of
presence
viral
RNA.
Here,
we
demonstrate
brain
infusion
mice
has
a
late
impact
on
cognitive
function,
recapitulating
post-COVID-19
syndrome.
We
also
show
neuroinflammation
and
hippocampal
microgliosis
mediate
Spike-induced
memory
via
complement-dependent
engulfment
synapses.
Genetic
pharmacological
blockage
Toll-like
receptor
4
(TLR4)
signaling
protects
animals
against
synapse
elimination
induced
by
infusion.
Accordingly,
cohort
86
who
recovered
mild
COVID-19,
genotype
GG
TLR4-2604G>A
(rs10759931)
associated
poor
outcome.
These
results
identify
TLR4
as
key
target
to
investigate
long-term
after
COVID-19
infection
humans
rodents.