Cell Discovery,
Journal Year:
2022,
Volume and Issue:
8(1)
Published: July 12, 2022
The
Omicron
variant
of
SARS-CoV-2
carries
multiple
unusual
mutations,
particularly
in
the
receptor-binding
domain
(RBD)
spike
(S)
protein.
Moreover,
host-adapting
such
as
residues
493,
498,
and
501,
were
also
observed
RBD,
which
indicates
that
it
is
necessary
to
evaluate
interspecies
transmission
risk
variant.
Herein,
we
evaluated
recognition
BA.1
Delta
RBDs
by
27
ACE2
orthologs,
including
humans.
We
found
expanded
its
receptor
binding
spectra
palm-civet,
rodents,
more
bats
(least
horseshoe
bat
greater
bat)
lesser
hedgehog
tenrec.
Additionally,
determined
cryo-electron
microscopy
(cryo-EM)
structure
S
protein
complexed
with
mouse
(mACE2)
crystal
RBD
palm-civet
(cvACE2).
Several
key
for
host
range
have
been
identified.
These
results
suggest
surveillance
should
be
enhanced
on
broader-species
prevent
spillover
expansion
reservoir
hosts
a
prolonged
pandemic.
New England Journal of Medicine,
Journal Year:
2022,
Volume and Issue:
386(22), P. 2097 - 2111
Published: May 4, 2022
The
ZF2001
vaccine,
which
contains
a
dimeric
form
of
the
receptor-binding
domain
severe
acute
respiratory
syndrome
coronavirus
2
and
aluminum
hydroxide
as
an
adjuvant,
was
shown
to
be
safe,
with
acceptable
side-effect
profile,
immunogenic
in
adults
phase
1
clinical
trials.
Signal Transduction and Targeted Therapy,
Journal Year:
2022,
Volume and Issue:
7(1)
Published: April 26, 2022
Abstract
The
current
pandemic
of
COVID-19
is
fueled
by
more
infectious
emergent
Omicron
variants.
Ongoing
concerns
variants
include
possible
recombinants,
as
genome
recombination
an
important
evolutionary
mechanism
for
the
emergence
and
re-emergence
human
viral
pathogens.
In
this
study,
we
identified
diverse
events
between
two
major
subvariants
(BA.1
BA.2)
other
concern
(VOCs)
interest
(VOIs),
suggesting
that
co-infection
subsequent
play
roles
in
ongoing
evolution
SARS-CoV-2.
Through
scanning
high-quality
completed
spike
gene
sequences,
18
core
mutations
BA.1
(frequency
>99%)
27
BA.2
(nine
than
BA.1)
were
identified,
which
15
are
specific
to
Omicron.
share
nine
common
amino
acid
(three
protein
with
most
VOCs,
a
origin
from
these
VOCs.
There
three
Alpha-related
BA.2,
phylogenetically
closer
Alpha
Revertant
found
some
dominant
>95%)
BA.1.
Most
notably,
multiple
characteristic
Delta
have
been
also
“Deltacron”-like
Variants
isolated
since
November
11,
2021
South
Africa,
implies
occurring
Monitoring
evolving
SARS-CoV-2
genomes
especially
critically
recognition
abrupt
changes
attributes
including
its
epitopes
may
call
vaccine
modifications.
New England Journal of Medicine,
Journal Year:
2022,
Volume and Issue:
386(9), P. 894 - 896
Published: Jan. 26, 2022
A
list
of
the
investigators
in
MEDLEY
Study
Group
is
provided
Section
S1
Supplementary
Appendix.A
complete
authors
available
with
full
text
this
letter
at
NEJM.org.The
data
sets
generated
or
analyzed
Emerging Microbes & Infections,
Journal Year:
2022,
Volume and Issue:
11(1), P. 1058 - 1071
Published: March 21, 2022
Safe,
efficacious,
and
deployable
vaccines
are
urgently
needed
to
control
COVID-19
in
the
large-scale
vaccination
campaigns.
We
report
here
preclinical
studies
of
an
approved
protein
subunit
vaccine
against
COVID-19,
ZF2001,
which
contains
tandem-repeat
dimeric
receptor-binding
domain
(RBD)
with
alum-based
adjuvant.
assessed
immunogenicity
efficacy
both
mice
non-human
primates
(NHPs).
ZF2001
induced
high
levels
RBD-binding
SARS-CoV-2
neutralizing
antibody
primates,
elicited
balanced
TH1/TH2
cellular
responses
NHPs.
Two
doses
protected
Ad-hACE2-transduced
infection,
as
detected
by
reduced
viral
RNA
relieved
lung
injuries.
In
NHPs,
either
25
μg
or
50
prevented
infection
lung,
trachea,
bronchi,
milder
lesions.
No
evidence
disease
enhancement
was
observed
animal
models.
has
been
for
emergency
use
China,
Uzbekistan,
Indonesia,
Columbia.
The
safety,
immunogenicity,
protection
NHPs
found
this
study
consistent
results
human
clinical
trials.
Cell Reports Medicine,
Journal Year:
2023,
Volume and Issue:
4(4), P. 100991 - 100991
Published: March 21, 2023
Emerging
Omicron
sub-variants
are
causing
global
concerns,
and
their
immune
evasion
should
be
monitored
continuously.
We
previously
evaluated
the
escape
of
BA.1,
BA.1.1,
BA.2,
BA.3
from
an
atlas
50
monoclonal
antibodies
(mAbs),
covering
seven
epitope
classes
severe
acute
respiratory
syndrome
coronavirus
2
(SARS-CoV-2)
receptor-binding
domain
(RBD).
Here,
we
update
totally
77
mAbs
against
emerging
including
BQ.1.1
XBB
find
that
BA.4/5,
BQ.1.1,
display
further
evasion.
Besides,
investigation
into
correlation
binding
neutralization
reveals
important
role
antigenic
conformation
in
mAb
functioning.
Moreover,
complex
structures
BA.2
RBD/BD-604/S304
BA.4/5
RBD/BD-604/S304/S309
elucidate
molecular
mechanism
antibody
by
these
sub-variants.
By
focusing
on
identified
broadly
potent
mAbs,
a
general
hotspot
RBD,
which
could
guide
design
vaccines
calls
for
new
broad-spectrum
countermeasures
COVID-19.