Immunohistochemistry of the Gut-Associated Lymphoid Tissue (GALT) in African Bonytongue (Heterotis niloticus, Cuvier 1829)
International Journal of Molecular Sciences,
Journal Year:
2023,
Volume and Issue:
24(3), P. 2316 - 2316
Published: Jan. 24, 2023
Heterotis
niloticus
is
a
basal
teleost,
belonging
to
the
Osteoglossidae
family,
which
widespread
in
many
parts
of
Africa.
The
digestive
tract
H.
presents
similar
characteristics
those
higher
vertebrates,
exhibiting
gizzard-like
stomach
and
lymphoid
aggregates
intestinal
lamina
propria.
adaptive
immune
system
teleost
fish
linked
with
each
their
mucosal
body
surfaces.
In
fish,
gut-associated
tissue
(GALT)
generally
diffuse
that
represents
an
important
line
defense
against
pathogens
inhabiting
external
environment
can
enter
through
food.
GALT
comprises
intraepithelial
lymphocytes,
reside
epithelial
layer,
propria
leukocytes,
consist
macrophages,
granulocytes,
dendritic-like
cells.
This
study
aims
characterize,
for
first
time,
leukocytes
present
niloticus,
by
confocal
immuno-
fluorescence
techniques,
using
specific
antibodies:
toll-like
receptor
2,
major
histocompatibility
complex
class
II,
S100
protein,
serotonin,
CD4,
langerin,
inducible
nitric
oxide
synthetase.
Our
results
show
massive
cells
thickness
submucosa,
arranged
circumscribed
oval-shaped
structures
are
morphologically
isolated
follicles
birds
mammals,
thus
expanding
our
knowledge
about
immunity
shown
this
fish.
Language: Английский
Effects of structural remodelling on gill physiology
Journal of Comparative Physiology B,
Journal Year:
2024,
Volume and Issue:
194(5), P. 595 - 609
Published: May 17, 2024
Language: Английский
Localization of Acetylcholine, Alpha 7-NAChR and the Antimicrobial Peptide Piscidin 1 in the Macrophages of Fish Gut: Evidence for a Cholinergic System, Diverse Macrophage Populations and Polarization of Immune Responses
Fishes,
Journal Year:
2023,
Volume and Issue:
8(1), P. 43 - 43
Published: Jan. 8, 2023
The
recognition
and
elimination
of
invading
pathogens
are
vital
for
host
survival.
Macrophages
play
a
central
role
in
protection
cells
functionally
reminiscent
vertebrate
macrophages
present
all
multicellular
organisms.
A
pattern
responsible
bacterial
found
on
the
surface
is
CD14.
These
possess
repertoire
antimicrobial
molecules
stored
their
granules
lysosomes.
Polarization
states
observed
mammalian
termed
M1
M2
also
likely
exist
fish
macrophages.
Markers
macrophage
subtypes
slowly
but
definitively
emerging
species.
In
study
cell
markers
such
as
CD14,
acetylcholine,
alpha
7
acetylcholine
nicotinic
receptor
(nAChR)
subtype,
inducible
nitric
oxidase
synthase
(iNOS),
peptide
piscidin
1
reported
first
time
intestinal
both
catfish
Heteropneustes
fossilis
(Bloch,
1794)
African
bonytongue
Heterotis
niloticus
(Cuvier,
1829)
along
anterior
posterior
axis
concentric
muscle
layers.
Many
effector
responses
including
respiratory
burst
NO
induction
similar
across
diverse
animal
taxa.
Antibodies
against
calbindin
coupled
with
ones
to
VAChT
tubulin
revealed
localization
myenteric
submucosal
plexuses,
which
made
up
enteric
neurons,
glial
cells,
nerves
near
Current
studies
allow
elucidation
multiple
roles
disease
models
providing
an
insight
into
vivo
function
fish.
Language: Английский
Nitric Oxide Function and Nitric Oxide Synthase Evolution in Aquatic Chordates
International Journal of Molecular Sciences,
Journal Year:
2023,
Volume and Issue:
24(13), P. 11182 - 11182
Published: July 6, 2023
Nitric
oxide
(NO)
is
a
key
signaling
molecule
in
almost
all
organisms
and
active
variety
of
physiological
pathological
processes.
Our
understanding
the
peculiarities
functions
this
simple
gas
has
increased
considerably
by
extending
studies
to
non-mammal
vertebrates
invertebrates.
In
review,
we
report
nitric
synthase
(Nos)
genes
so
far
characterized
chordates
provide
an
extensive,
detailed,
comparative
analysis
function
NO
aquatic
tunicates,
cephalochordates,
teleost
fishes,
amphibians.
This
comprehensive
set
data
adds
new
elements
our
Nos
evolution,
from
single
gene
commonly
found
invertebrates
three
present
vertebrates.
Language: Английский
Fish gill chemosensing: knowledge gaps and inconsistencies
Journal of Comparative Physiology B,
Journal Year:
2024,
Volume and Issue:
194(5), P. 1 - 33
Published: May 17, 2024
Language: Английский
Air‐breathing behavior in Heterotis niloticus fingerlings: Response to changes in oxygen, temperature, and exercise regimes
Journal of Fish Biology,
Journal Year:
2023,
Volume and Issue:
103(5), P. 1044 - 1053
Published: July 8, 2023
Air-breathing
in
fish
is
believed
to
have
arisen
as
an
adaptation
aquatic
hypoxia.
Although
air-breathing
has
been
widely
studied
numerous
species,
little
known
about
the
obligate
African
bonytongue,
Heterotis
niloticus.
We
evaluated
if
abiotic
factors
and
physical
activity
affect
patterns
fingerlings.
The
frequency
(fAB
)
behavioral
responses
of
H.
niloticus
fingerlings
were
assessed
response
environmental
oxygen,
temperature,
exhaustion
a
series
experiments.
behavior
under
optimum
water
conditions
was
characterized
by
swift
excursions
lasting
less
than
1
s
air-water
interface
gulp
air.
intervals
between
air-breaths
highly
variable,
ranging
from
3
259
s.
Body
size
only
slightly
affected
fAB
,
while
hypoxia,
hyperthermia,
exercise
stress
significantly
increased
.
Progressive
hypoxia
17.69
2.17
kPa
caused
~2.5-fold
increase
Increasing
temperatures
27
32°C,
baseline
temperature
22°C,
0.4
±
0.2
1.3
0.5
1.6
breaths
min-1
respectively.
Lastly,
following
exhaustive
exercise,
up
3-fold.
These
observations
suggest
that
are
very
reliant
on
aerial
their
sensitive
changes
levels.
Language: Английский
The gas bladder of Heterotis niloticus (Cuvier, 1829)
Journal of Morphology,
Journal Year:
2023,
Volume and Issue:
284(5)
Published: March 28, 2023
This
work
reports
on
the
structural
characteristics
of
respiratory
gas
bladder
osteoglossiform
fish
Heterotis
niloticus.
The
bladder-vertebrae
relationships
are
also
analyzed.
A
slit-shaped
orifice
in
mediodorsal
pharyngeal
wall
is
surrounded
by
a
muscle
sphincter
and
serves
as
glottis-like
opening
to
bladder.
dorsolateral
internal
surface
lined
parenchyma
highly
vascularized
trabeculae
septa
displaying
an
alveolar-like
structure.
contain,
addition
vessels,
numerous
eosinophils
probably
involved
immune
responses.
air
spaces
endowed
with
thin
exchange
barrier
indicating
good
potential
for
exchange.
ventral
well-vascularized
membrane
that
exhibits
luminal
face
inner
structure
dominated
presence
layer
richly
innervated
smooth
muscle.
suggestive
autonomous
adjustability
wall.
trunk
vertebrae
show
large
transverse
processes
(parapophyses)
openings
lead
into
intravertebral
become
invaded
parenchyma.
Curiously,
caudal
regular
teleost
morphology
neural
hemal
arches,
but
have
similar
pneumatic
spaces.
African
Arowana
hence
rivals
freshwater
butterfly
Pantodon
its
exceptional
role
postcranial
skeletal
pneumaticity
outside
Archosauria.
possible
significance
these
findings
discussed.
Language: Английский
Heterotis niloticus (African Bonytongue) Domestication: Potentials, Efforts, and Challenges
Fishes,
Journal Year:
2024,
Volume and Issue:
10(1), P. 3 - 3
Published: Dec. 25, 2024
Heterotis
niloticus
is
a
fascinating
freshwater
fish
species
popularly
referred
to
as
the
African
bonytongue.
It
offers
great
potential
for
aquaculture
due
its
rapid
growth,
flesh
quality,
adaptability
low
oxygen
environments,
and
high
market
value.
Domestication
efforts
this
have
been
initiated
optimize
production
meet
increasing
global
demand
sustainable
protein
sources.
This
review
explores
current
state
of
H.
domestication
highlights
key
challenges
opportunities.
Despite
their
promising
potential,
several
obstacles
remain,
including
development
efficient
hatchery
techniques,
optimization
feed
formulations,
disease
control.
Overcoming
these
essential
promote
full
contribute
improved
food
security.
Future
research
should
focus
on
refining
breeding
programs,
improving
water
quality
management,
exploring
innovative
systems.
Policy
support
driving
investments,
innovation,
conservation
efforts,
aquaculture.
Language: Английский