Name: using a whole-mount immunohistochemical method to study the innervation of the biliary tract in suncus murinus
Uploaded: 2017-06-15T12:30:00
Description: Watch this Scientific Journal Video about Using a Whole-mount Immunohistochemical Method to Study the Innervation of the Biliary Tract in Suncus murinus at JoVE.com

The authors have no acknowledgements.

All experimental procedures were approved by the Tokyo Metropolitan University Institutional Animal Care and Use Committee (IACUC). The animals were housed and handled in accordance with the Guide for the Care and Use of Laboratory Animals and the Guide for the Care and Use of Experimental Animals of the Canadian Council on Animal Care. We used animals bred and maintained at the Functional Morphology Laboratory, Department of Frontier Health Sciences, Tokyo Metropolitan University, Japan.
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This work describes the experimental procedure for the visualization of the innervation of the extrahepatic biliary tract using an antibody against neurofilament protein. This protocol was adapted from the protocol described by Kuratani and Tanaka1,2,3.
For this experiment, plan the timeline for each of the experiments, as the whole-mount staining approach continues for 2-3 weeks. The vessel containin...

The house musk shrew, Suncus murinus, belongs to the order Insectivora and the family Soricidae. This tiny mammal is distributed throughout Southeast Asia and inhabits houses and grassy areas that are situated near human habitations or cattle pens4. This species exhibits general morphological characteristics more similar to humans than other laboratory animals, such as the mouse, rat, and rabbit5. Previously, whole-mount immunostaining with a peripheral neuron marker for S. murinus neurofilament protein (NFP) was used to label peripheral nerves in the pancreas6, major duodenal papilla7, pylorus8, gallbladder5, and extrahepatic biliary tract9.
NFP is a macromolecular complex that is part of the mature neuronal cytoskeleton. Neurofilament-related proteins mediate interactions between NFP and the zygosome. Both enzyme function and the structure of linker proteins are regulated by NFP10. The NFP complex is made of three polypeptides: NF-L (70 kDa), NF-M (150-160 kDa), and NF-H (200 kDa). NFP can be found in neuronal axons in both the central and peripheral nervous system. Anti-human NFP antibody has been shown to label axons of the central and peripheral nervous system. Anatomical and electrophysiological investigations have demonstrated that the sphincter, gallbladder, and proximal gastrointestinal tract are connected11,12,13,14. However, the morphological features of their neuronal connections have not yet been defined.
This work demonstrates the use of a whole-mount immunohistochemical staining method to label the innervation of the S. murinus biliary tract with an NFP antibody.

<table border="0" cellpadding="0" cellspacing="0" width="573">
	<tbody>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">orthoperiodic acid</td>
			<td style="width:71px;">Wako</td>
			<td style="width:119px;">162-00732</td>
			<td style="width:167px;"></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">papain</td>
			<td style="width:71px;">Wako</td>
			<td style="width:119px;">164-00172</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">bovine serum albumin (BSA)</td>
			<td style="width:71px;">Wako</td>
			<td style="width:119px;">010-15131</td>
			<td></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:216px;">sodium azide</td>
			<td style="width:71px;">Nacalai Tesque</td>
			<td style="width:119px;">312-33</td>
			<td></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:216px;">neurofilament protein (NFP) antibody</td>
			<td style="width:71px;">Dako</td>
			<td style="width:119px;">M0762, lot 089, clone: 2F11</td>
			<td></td>
		</tr>
		<tr height="63">
			<td height="63" style="height:63px;width:216px;">peroxidase-conjugated affinity-purified sheep anti-mouse IgG-HRP</td>
			<td style="width:71px;">MBL</td>
			<td style="width:119px;">Code 330</td>
			<td></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;width:216px;">3,3&#39;-diaminobenzidine tetrahydrochloride (DAB)</td>
			<td style="width:71px;">Wako</td>
			<td style="width:119px;">349-00903</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;width:216px;">imidazole</td>
			<td style="width:71px;">Sigma</td>
			<td style="width:119px;">I-0125</td>
			<td></td>
		</tr>
	</tbody>
</table>

using a whole-mount immunohistochemical method to study the innervation of the biliary tract in suncus murinus

This work describes the whole-mount immunohistochemistry staining method in detail, using neurofilament protein antibody to label the innervation of the biliary tract in Suncus murinus (S. murinus&#160;). First, the specimen was dissected from S. murinus and fixed in 4% paraformaldehyde (PFA). Second, an enzymatic treatment and potential endogenous peroxidase inactivation were performed. The specimen was then exposed to the primary antibody, anti-neurofilament protein antibody, for 3-6 days. It was then incubated with the secondary antibody conjugated with horseradish peroxidase. The color reaction was revealed by reacting the specimen with a 3,3&#39;-diaminobenzidine (DAB) substrate. This method can be applied to analyze the innervation of all visceral organs. Furthermore, this protocol can also be adapted to test other neuronal antibodies, but optimization of the antibodies should be done first. This method was originally introduced by Kuratani and Tanaka1,2,3.

Figures 1-4 show typical results for NFP-positive nerve fibers in the extrahepatic biliary tract in S. murinus. The antibody against NFP reproducibly labeled the innervation in the entire image of the extrahepatic biliary tract (Figure 1), gallbladder (Figure 2), upper bile duct (Figure 3), and duodenal papilla area (Figure 4), ...

Watch this Scientific Journal Video about Using a Whole-mount Immunohistochemical Method to Study the Innervation of the Biliary Tract in Suncus murinus at JoVE.com

Using a Whole-mount Immunohistochemical Method to Study the Innervation of the Biliary Tract in Suncus murinus

A whole-mount immunohistochemical approach, to visualize neurofilament protein expression in the extrahepatic biliary tract in Suncus murinus. is presented here. This protocol can be used to analyze the innervation of all visceral organs in S. murinus or other species.

Using a Whole-mount Immunohistochemical Method to Study the Innervation of the Biliary Tract in Suncus murinus

This work describes the whole-mount immunohistochemistry staining method in detail, using neurofilament protein antibody to label the innervation of the ...

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