Journal of Enzyme Inhibition and Medicinal Chemistry,
Journal Year:
2024,
Volume and Issue:
39(1)
Published: May 30, 2024
Tyrosinase,
a
pivotal
enzyme
in
melanin
synthesis,
is
primary
target
for
the
development
of
depigmenting
agents.
In
this
work,
vitro
and
silico
techniques
were
employed
to
identify
novel
tyrosinase
inhibitors
from
set
12
anilino-1,4-naphthoquinone
derivatives.
Results
mushroom
activity
assay
indicated
that,
among
derivatives,
three
compounds
(1,
5,
10)
demonstrated
most
significant
inhibitory
against
tyrosinase,
surpassing
effectiveness
kojic
acid.
Molecular
docking
revealed
that
all
studied
derivatives
interacted
with
copper
ions
amino
acid
residues
at
active
site.
dynamics
simulations
provided
insights
into
stability
enzyme–inhibitor
complexes,
which
1,
particularly
10
displayed
greater
stability,
atomic
contacts,
structural
compactness
than
Drug
likeness
prediction
further
strengthens
potential
anilino-1,4-naphthoquinones
as
promising
candidates
treatment
hyperpigmentation
disorders.
Advanced Functional Materials,
Journal Year:
2024,
Volume and Issue:
34(19)
Published: Jan. 4, 2024
Abstract
The
blood–brain
barrier
(BBB)
is
a
tailored
system
of
capillary
endothelial
cells
intermixed
with
tight
junctions
and
adherent
that
regulates
the
transport
various
materials
substances
between
blood
vasculature
central
nervous
(CNS).
However,
in
cases
brain
diseases,
BBB's
protective
regulatory
effects
hamper
therapeutics
from
reaching
affected
sites
sufficient
quantities.
This
has
so
far
been
leading
challenge
treating
CNS
diseases
disorders.
For
this
problem
to
be
overcome,
recent
research
sought
develop
novel
modalities
achieve
efficient
therapy
alleviate
associated
symptoms.
Therefore,
numerous
strategies
have
operated
years
address
limitations
traditional
invasive
methods,
including
poor
penetration
serious
side
effects.
As
desperately
in‐demand
technology,
nanotheranostics
particularly
shown
promising
results.
Herein,
review
reports
advancements
techniques
nanotechnology‐based
developed
for
neurodegenerative
study
provides
comprehensive
data
on
subject
used
future
studies
management
disorders
diseases.
Jordan Journal of Pharmaceutical Sciences,
Journal Year:
2024,
Volume and Issue:
17(3), P. 530 - 548
Published: Sept. 24, 2024
Background:
Skin
problems
caused
by
oxidative
stress
lead
to
the
activation
of
collagenase
and
tyrosinase
enzymes,
contributing
skin
aging,
discoloration,
infections.
Equisetum
ramosissimum
Moringa
peregrina
were
assessed
for
their
potential
uses
in
treating
various
conditions.
Objective:
The
present
research
aimed
investigate
positive
effects
polyphenols
extracts
as
cosmetic
products
treatment
different
Methods:
Total
phenolic
flavonoid
contents,
antioxidants,
anti-collagenase
anti-tyrosinase
activities
plant
extract
mixtures
(PEM)
at
ratios
(M.
peregrina:
E.
ramosissimum)
determined
using
standard
procedures.
Inhibitory
PEM
against
acne-causing
Staphylococcus
aureus
(ATCC
29213)
evaluated
diameter
(cm)
inhibition
zone
method.
A
cream
formulation
containing
was
developed
characterized
stability
irritation
rats
Results:
a
ratio
(2:1)
showed
highest
total
content
(150.15
±
2.8
mg/g,
equivalent
gallic
acid,
41.5
1.2
quercetin,
respectively).
Antioxidant
also
optimal,
DPPH
ABTS
methods
(IC50
=
7.06
0.12
µg/mL
53.29
3.3
µg/mL,
Furthermore,
exhibited
superior
inhibitory
enzymes
32.4
1.19
8.4
Antimicrobial
activity
tested
on
S.
largest
growth
(2.8
cm)
concentration
60
mg/mL.
Studies
revealed
that
it
remained
stable
under
room
tests
no
signs
oedema
or
erythema
after
treatment.
Conclusion:
with
demonstrated
optimal
an
stress-neutralizing
agent,
inhibitor
responsible
aging
hyperpigmentation,
antibacterial
agent.
physical
detectable
risk
throughout
Journal of Medicinal Chemistry,
Journal Year:
2024,
Volume and Issue:
67(9), P. 7260 - 7275
Published: April 23, 2024
Artificial
intelligence
(AI)
de
novo
molecular
generation
is
a
highly
promising
strategy
in
the
drug
discovery,
with
deep
reinforcement
learning
(RL)
models
emerging
as
powerful
tools.
This
study
introduces
fragment-by-fragment
growth
RL
forward
and
optimization
based
on
low
activity
lead
compound.
process
integrates
fragment
growth-based
reaction
templates,
while
target
docking
drug-likeness
prediction
were
simultaneously
performed.
comprehensive
approach
considers
similarity,
internal
diversity,
synthesizability,
effectiveness,
thereby
enhancing
quality
efficiency
of
generation.
Finally,
series
tyrosinase
inhibitors
generated
synthesized.
Most
compounds
exhibited
more
improved
than
lead,
an
optimal
candidate
compound
surpassing
effects
kojic
acid
demonstrating
significant
antipigmentation
zebrafish
model.
Furthermore,
metabolic
stability
studies
indicated
susceptibility
to
hepatic
metabolism.
The
proposed
AI
structural
strategies
will
play
role
accelerating
discovery
improving
traditional
efficiency.
Pharmaceuticals,
Journal Year:
2024,
Volume and Issue:
17(5), P. 618 - 618
Published: May 10, 2024
Sambuci
folium
(elderberry
leaves)
have
been
used
in
traditional
medicine,
mainly
externally,
to
treat
skin
diseases
and
wounds.
Therefore,
the
aim
of
this
study
was
screen
biological
activity
elderberry
leaves
(antioxidant
potential
possibility
inhibition
tyrosinase
hyaluronidase
enzymes)
combined
with
phytochemical
analysis.
For
purpose,
a
analysis
carried
out.
Elderberry
12
varieties
(“Sampo”,
“Obelisk”,
“Dwubarwny”,
“Haschberg”,
“Haschberg
1”,
“Koralowy”,
“Sambo”,
“Black
Beauty”,
Tower”,
“Golden
hybrid”,
“Samyl”,
“Samyl
1”)
two
growth
stages.
The
compounds
from
selected
groups,
phenolic
acids
(chlorogenic
acid)
flavonols
(quercetin),
were
chromatographically
determined
hydroalcoholic
leaf
extracts.
All
tested
extracts
showed
antioxidant
effects,
but
most
promising
potential:
very
high
content
(TPC
=
61.85
mg
GAE/g),
(e.g.,
DPPH
IC50
1.88
mg/mL;
CUPRAC
IC0.5
0.63
mg/mL)
optimal
anti-inflammatory
(inhibition
41.28%)
activities
indicated
for
older
“Sampo”
variety.
Additionally,
extract
obtained
hybrid”
variety
facilitated
treatment
wounds
scratch
test.
In
summary,
best
multidirectional
pro-health
effect
treating
inflammation
specified
II
(leaves
during
flowering
period);
however,
wound
noted
as
rich
chlorogenic
acid
younger
Molecules,
Journal Year:
2025,
Volume and Issue:
30(4), P. 788 - 788
Published: Feb. 8, 2025
Increasing
attention
is
being
focused
on
skin
health
currently,
especially
the
excessive
deposition
of
melanin
in
skin.
Tyrosinase,
rate-limiting
enzyme
biosynthesis,
a
crucial
synthesis.
However,
existing
tyrosinase
inhibitors
pose
some
degree
toxicity
to
humans.
Therefore,
development
more
efficient
and
low-toxicity
urgently
needed.
This
review
briefly
depicts
biosynthesis
process
crystal
structure
catalytic
mechanism
tyrosinase.
The
latest
research
progress
regarding
small-molecule
also
reviewed.
Moreover,
structure-function
relationships
are
analyzed
summarized.
expected
provide
new
scientific
insights
enable
researchers
explore
safer
potent
inhibitors.
Marine Drugs,
Journal Year:
2025,
Volume and Issue:
23(2), P. 83 - 83
Published: Feb. 14, 2025
The
cosmeceutical
industry
has
increasingly
turned
its
attention
to
marine
macroalgae,
recognizing
their
significant
bioactive
potential
as
sources
of
natural
compounds
for
skincare
applications.
A
growing
number
products
now
incorporate
extracts
or
isolated
from
various
macroalgae
species.
However,
many
species
remain
underexplored,
highlighting
a
valuable
opportunity
further
research.
Among
these,
Caulerpa
prolifera
(Forsskål)
J.V.
Lamouroux
emerged
promising
candidate
This
study
provides
the
most
comprehensive
phytochemical
assessment
C.
date,
revealing
source
and
compounds.
analysis
identified
key
components
lipophilic
profile,
predominantly
saturated
unsaturated
fatty
acids,
alongside
di-(2-ethylhexyl)
phthalate-an
endocrine
disruptor
potentially
biosynthesized
bioaccumulated
by
algae.
While
crude
extract
exhibited
moderate
tyrosinase
inhibitory
activity,
overall
antioxidant
capacity
was
limited.
Fractionation
extract,
however,
yielded
subfractions
with
distinct
bioactivities
linked
changes
in
chemical
composition.
Notably,
enhanced
activities
against
elastase
collagenase
were
observed
enriched
1-octadecanol
only
traces
phthalate.
Conversely,
activity
diminished
loss
specific
such
β-sitosterol,
erucic
acid,
nervonic
lignoceric
acid.
work
advances
understanding
relationship
between
composition
bioactivities,
emphasizing
ingredients,
leading
more
valorization
this
macroalga.