Diagnosis
and
treatment
of
circadian
rhythm
sleep-wake
disorders
both
require
assessment
phase
the
brain’s
pacemaker.
The
gold-standard
univariate
method
is
based
on
collection
a
24-hr
time
series
plasma
melatonin,
suprachiasmatic
nucleus-driven
pineal
hormone.
We
developed
validated
multivariate
whole-blood
mRNA-based
predictor
melatonin
which
requires
few
samples.
Transcriptome
data
were
collected
under
normal,
sleep-deprivation
abnormal
sleep-timing
conditions
to
assess
robustness
predictor.
Partial
least
square
regression
(PLSR),
applied
transcriptome,
identified
set
100
biomarkers
primarily
related
glucocorticoid
signaling
immune
function.
Validation
showed
that
PLSR-based
predictors
outperform
published
blood-derived
predictors.
When
given
one
sample
as
input,
R2
predicted
vs
observed
was
0.74,
whereas
for
two
samples
taken
12
hr
apart,
0.90.
This
blood
transcriptome-based
model
enables
from
Science,
Journal Year:
2018,
Volume and Issue:
359(6381)
Published: Feb. 8, 2018
Daily
transcription
cycling
in
the
baboon
Much
of
our
knowledge
about
important
effects
circadian
rhythms
physiology
comes
from
studies
mice,
which
are
nocturnal.
Mure
et
al.
report
transcriptional
profiles
many
tissues
and
brain
regions
baboons
over
a
24-hour
period
(see
Perspective
by
Millius
Ueda).
The
results
emphasize
how
extensive
rhythmic
expression
is,
with
more
than
80%
protein-coding
genes
involved.
They
also
highlight
unanticipated
differences
between
mouse
transcripts
various
tissues.
findings
provide
comprehensive
analysis
variation
gene
for
diurnal
animal
closely
related
to
humans.
Science
,
this
issue
p.
eaao0318
;
see
1210
Stress,
Journal Year:
2018,
Volume and Issue:
21(5), P. 403 - 416
Published: May 15, 2018
The
hypothalamic-pituitary-adrenal
(HPA)
axis
is
the
major
neuroendocrine
regulating
homeostasis
in
mammals.
Glucocorticoid
hormones
are
rapidly
synthesized
and
secreted
from
adrenal
gland
response
to
stress.
In
addition,
under
basal
conditions
glucocorticoids
released
rhythmically
with
both
a
circadian
an
ultradian
(pulsatile)
pattern.
These
rhythms
important
not
only
for
normal
function
of
glucocorticoid
target
organs,
but
also
HPA
responses
Several
studies
have
shown
that
disruption
associated
disease
humans
rodents.
this
review,
we
will
discuss
our
knowledge
negative
feedback
mechanisms
regulate
synthesis
secretion
glucocorticoids,
including
role
mineralocorticoid
receptors
their
chaperone
protein
FKBP51.
Moreover,
light
recent
findings,
importance
intra-adrenal
receptor
signaling
synthesis.
Pharmacological Reviews,
Journal Year:
2017,
Volume and Issue:
69(2), P. 161 - 199
Published: March 28, 2017
Chronotherapeutics
aim
at
treating
illnesses
according
to
the
endogenous
biologic
rhythms,
which
moderate
xenobiotic
metabolism
and
cellular
drug
response.
The
molecular
clocks
present
in
individual
cells
involve
approximately
fifteen
clock
genes
interconnected
regulatory
feedback
loops.
They
are
coordinated
by
suprachiasmatic
nuclei,
a
hypothalamic
pacemaker,
also
adjusts
circadian
rhythms
environmental
cycles.
As
result,
many
mechanisms
of
diseases
effects
controlled
timing
system.
Thus,
tolerability
nearly
500
medications
varies
up
fivefold
scheduling,
both
experimental
models
and/or
patients.
Moreover,
treatment
itself
disrupted,
maintained,
or
improved
system
as
function
timing.
Improved
patient
outcomes
on
circadian-based
treatments
(chronotherapy)
have
been
demonstrated
randomized
clinical
trials,
especially
for
cancer
inflammatory
diseases.
However,
recent
technological
advances
highlighted
large
interpatient
differences
functions
resulting
significant
variability
chronotherapy
Such
findings
advocate
advancement
personalized
chronotherapeutics
through
interdisciplinary
systems
approaches.
combination
mathematical,
statistical,
technological,
experimental,
expertise
is
now
shaping
development
dedicated
devices
diagnostic
delivery
algorithms
enabling
individualization.
In
particular,
multiscale
chronopharmacology
approaches
currently
combine
mathematical
modeling
based
whole-body
physiology
preclinical
investigations
toward
design
patient-tailored
chronotherapies.
We
review
research
works
aiming
individualization
disease
treatment,
with
emphasis
management
system–resetting
strategies
improving
chronic
control
outcomes.
Frontiers in Neuroendocrinology,
Journal Year:
2018,
Volume and Issue:
49, P. 124 - 145
Published: Feb. 8, 2018
Bruce
McEwen’s
discovery
of
receptors
for
corticosterone
in
the
rat
hippocampus
introduced
higher
brain
circuits
neuroendocrinology
stress.
Subsequently,
these
were
identified
as
mineralocorticoid
(MRs)
that
are
involved
appraisal
processes,
choice
coping
style,
encoding
and
retrieval.
The
MR-mediated
actions
on
cognition
complemented
by
slower
via
glucocorticoid
(GRs)
contextualization,
rationalization
memory
storage
experience.
These
sequential
phases
cognitive
performance
depend
synaptic
metaplasticity
is
regulated
coordinate
MR-
GR
activation.
receptor
activation
includes
recruitment
coregulators
transcription
factors
determinants
context-dependent
specificity
steroid
action;
they
can
be
modulated
genetic
variation
(early)
Interestingly,
inflammatory
responses
to
damage
seem
governed
a
similarly
balanced
MR:GR-mediated
action
initiating,
terminating
priming
mechanisms
stress-adaptation.
We
conclude
with
five
questions
challenging
MR:GR
balance
hypothesis.
The Journal of Clinical Endocrinology & Metabolism,
Journal Year:
2020,
Volume and Issue:
106(1), P. 264 - 281
Published: Oct. 26, 2020
Abstract
Context
Denosumab
discontinuation
is
characterized
by
an
increase
in
bone
turnover
overriding
pretreatment
status,
a
rapid
loss
the
majority
and
multiple
vertebral
fractures
(VFx)
some
patients.
Methods
A
working
group
of
European
Calcified
Tissue
Society
performed
updated
systematic
review
existing
literature
on
changes
turnover,
mineral
density
(BMD),
fracture
risk
after
denosumab
provided
advice
management
based
expert
opinion.
Results
Important
factors
for
VFx
following
cessation
are
prevalent
VFx,
longer
duration
off
therapy,
greater
gain
hip
BMD
during
therapy
according
to
retrospective
analysis
FREEDOM
Extension
Study.
Case
series
indicate
that
prior
bisphosphonate
mitigates
biochemical
rebound
phenomenon
discontinuation,
but
it
uncertain
whether
this
attenuation
prevents
fractures.
Current
evidence
indicates
partial
efficacy
subsequent
antiresorptive
treatment
with
results
seemingly
dependent
treatment.
Conclusions
careful
assessment
indications
start
advised,
especially
younger
case
long-term
can
be
made
patients
at
high
already
given
favorable
safety
profile.
In
alternative
should
initiated
6
months
final
injection.
Assessment
markers
may
help
define
optimal
regimen,
pending
ongoing
randomized
controlled
trials.
Patients
who
have
sustained
offered
prompt
reduce
turnover.
Frontiers in Neurology,
Journal Year:
2018,
Volume and Issue:
9
Published: Feb. 8, 2018
Light
exerts
a
wide
range
of
effects
on
mammalian
physiology
and
behaviour.
As
well
as
synchronising
circadian
rhythms
to
the
external
environment,
light
has
been
shown
modulate
autonomic
neuroendocrine
responses
regulating
sleep
influencing
cognitive
processes
such
attention,
arousal
performance.
The
last
two
decades
have
seen
major
advances
in
our
understanding
retinal
photoreceptors
that
mediate
these
non-image
forming
light,
neural
pathways
molecular
mechanisms
by
which
are
generated
entrained
light/dark
(LD)
cycle.
By
contrast,
lighting
influences
more
equivocal.
different
complex.
direct
indirect
may
also
occur
due
disrupted
entrainment.
Despite
widespread
use
LD
cycles
study
role
cognition,
experimental
protocols
used
subtly
function
not
comparable.
Moreover,
will
disrupt
alter
physiological
arousal,
both
known
cognition.
Studies
behavioural
assays
dependent
upon
sensory
processes,
contribute
their
variable
findings.
Here
we
propose
studies
addressing
conditions
must
account
for
rhythms,
if
fully
understand
basis
effects.