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Distribution and neurochemical characterisation of neurons containing neuregulin 1 in the enteric nervous system within the porcine small intestine Cover

Distribution and neurochemical characterisation of neurons containing neuregulin 1 in the enteric nervous system within the porcine small intestine

Open Access
|Nov 2024

Figures & Tables

Fig. 1.

Example micrographs of neuregulin 1 (NRG 1)-positive neurons in the duodenal myenteric plexus (I), jejunal outer submucous plexus (II) and ileal inner submucous plexus (III). Arrows – neurons immunoreactive to both the anti–protein gene product (PGP) 9.5 and anti-NRG 1 antibodies; scale bar – 20 μm

Fig. 2.

Example micrographs of the colocalisation of vasoactive intestinal polypeptide (VIP) and neuregulin 1 (NRG 1) in neurons located in the duodenal outer submucous plexus (I), jejunal inner submucous plexus (II) and ileal myenteric plexus (III). Arrows – neurons immunoreactive to both the anti-VIP and anti-NRG1 antibodies; scale bar – 20 μm

Fig. 3.

Example micrographs of the colocalisation of galanin (GAL) and neuregulin 1 (NRG 1) in neurons located in the duodenal myenteric plexus (I), jejunal inner submucous plexus (II) and ileal outer submucous plexus (III). Arrows – neurons immunoreactive to both the anti-GAL and anti-NRG1 antibodies; scale bar – 20 μm

Fig. 4.

Example micrographs of the colocalisation of the neuronal isoform of nitric oxide synthase (nNOS) and neuregulin 1 (NRG 1) in neurons located in the duodenal outer submucous plexus (I), jejunal inner submucous plexus (II) and ileal myenteric plexus (III). Arrows – neurons immunoreactive to both the anti-nNOS and anti-NRG 1 antibodies; scale bar – 20 μm

The list of antisera and reagents used in immunohistochemical investigations

Primary antibodies
AntigenCodeSpeciesWorking dilutionSupplier
GALT-5036Guinea pig1 : 2,000Peninsula Labs, San Carlos, CA, USA
nNOSN218Mouse1 : 1,000Sigma-Aldrich, Saint Louis, MO, USA
NRG 1AA 198–229Rabbit1 : 1,000Antibodies-online, Aachen, Germany
PGP 9.57863-2004Mouse1 : 1,000BioRad, Hercules, CA, USA
VIP9535-0504Mouse1 : 1,000BioRad
Secondary antibodies
Working dilutionSupplier
Alexa Fluor 488 donkey anti-rabbit IgG1 : 1,000ThermoFisher Scientific Waltham, MA, USA
Alexa Fluor 546 donkey anti-mouse IgG1 : 1,000ThermoFisher Scientific
Alexa Fluor 546 donkey anti-guinea pig IgG1 : 1,000ThermoFisher Scientific

The degree of colocalisation of neuregulin 1 (NRG 1) and the neuronal isoform of nitric oxide synthase (nNOS) in the porcine small intestine

Enteric plexusDuodenumJejunumIleum
MP17.03 ± 1.35 %a31.04 ± 1.06 %b31.77 ± 1.14 %b
OSP26.25 ± 1.46 %a31.43 ± 1.22 %b29.52 ± 0.93 %b
ISP18.82 ± 1.28 %a15.96 ± 1.02 %a16.96 ± 1.19 %a

The degree of colocalisation of neuregulin 1(NRG 1) and galanin (GAL) in the porcine small intestine

Enteric plexusDuodenumJejunumIleum
MP15.67 ± 0.94%a28.73 ± 0.81%b26.38 ± 1.37%b
OSP17.41 ± 1.00%a30.53 ± 1.29%b26.21 ± 0.84%c
ISP11.47 ± 1.21%a26.01 ± 1.10%b15.17 ± 1.24%a

The percentage of neuregulin 1-positive neurons in the porcine small intestine

Enteric plexusDuodenumJejunumIleum
MP21.52 ± 0.98%a16.16 ± 0.88%b18.48 ± 0.66%b
OSP19.98 ± 0.69%a16.26 ± 0.84%b15.20 ± 0.63%b
ISP16.92 ± 1.19%a8.38 ± 0.55%b10.26 ± 0.70%b

The degree of colocalisation of neuregulin 1 (NRG 1) and vasoactive intestinal polypeptide (VIP) in the porcine small intestine

Enteric plexusDuodenumJejunumIleum
MP32.39 ± 1.82%a25.50 ± 1.69%b29.17 ± 1.45%a
OSP41.91 ± 1.90%a24.96 ±2.24%b36.62 ± 1.43%c
ISP25.16 ± 0.94%a20.46 ± 1.23%b23.55 ± 0.87%a
Language: English
Page range: 623 - 632
Submitted on: Jun 4, 2024
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Accepted on: Oct 29, 2024
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Published on: Nov 6, 2024
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year

© 2024 Łukasz Puchała, Sławomir Gonkowski, Liliana Rytel, Joanna Wojtkiewicz, Waldemar Jarosław Grzegorzewski, published by National Veterinary Research Institute in Pulawy
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.