Name: diagnosis of hirschsprung's disease by immunostaining rectal suction biopsies for calretinin, s100 protein and protein gene product 9.5
Uploaded: 2019-04-26T12:30:00
Description: Watch this Scientific Journal Video about Diagnosis of Hirschsprung's Disease by Immunostaining Rectal Suction Biopsies for Calretinin, S100 Protein and Protein Gene Product 9.5 at JoVE.com

The authors thank Weibing Tang for his great help in providing the filming lab. This article is supported by the Public Welfare Research, and special funds were received from the National Health and Family Planning of China (Grant No.201402007).

This protocol was approved by the Research Ethics Board of the Union Hospital of Huazhong University of Science and Technology.
1. Rectal Suction Biopsy
<ol>
	<li>Perform the rectal suction biopsy by a well-trained pediatric surgeon and an assistant using a Rbi2 suction rectal biopsy system after obtaining informed consent from the guardian.
	<ol>
		<li>Perform RSB on patients that have the following indications: inability to pass meconium in infants or long-term bloating with or without con...

<ol>
	<li>Tam, P. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Hirschsprung's+disease:+A+bridge+for+science+and+surgery.">Hirschsprung's disease: A bridge for science and surgery.</a> Journal of Pediatric Surgery. 51 (1), 18-22 (2016).</li><li>Heanue, T. A., Pachnis, V. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Enteric+nervous+system+development+and+Hirschsprung's+disease:+advances+in+genetic+and+stem+cell+studies.">Enteric nervous system development and Hirschsprung's disease: advances in genetic and stem cell studies.</a> Nature Reviews Neuroscience. 8 (6), 466-479 (2007).</li><li>Setiadi, J. A., Dwihantoro, A., Iskandar, K., Heriyanto, D. 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Here we described a procedure using three different immunohistochemical antibodies to stain RBS sections for the diagnosis of HD. The sensitivity of our diagnostic protocol was 96.49% (95% CI, 0.88-0.99), and the specificity was 100% (95% CI, 0.97-1.00).
The most critical steps of the protocol are RSB and antigen-antibody reaction. The size of the biopsy determines the accuracy of the staining. A small biopsy will not provide enough tissue to make a precise diagnosis, while a large biopsy lead...

Hirschsprung&#39;s disease (HD) is a common congenital gut intestinal disorder characterized by a lack of ganglion cells in different segments of the distal intestinal tract1. The human enteric nervous system is formed when the invasion of the embryonic neural cells is completed. If there is a disturbance of the process and the invasion fails to complete, the distal intestine of the newborn becomes aganglionic2. This potentially fatal condition is called Hirschsprung&#39;s disease. Proliferation, motility, and gut growth are the three main components of successful colonization.
Traditional hematoxylin and eosin (H&#38;E) staining of a limited submucosal biopsy cannot attain as satisfactory of a result as H&#38;E staining of a full-thickness tissue obtained from surgery. Additionally, acetylcholinesterase (AChE) staining of rectal suction tissue is theoretically challenging due to its inadequate sensitivity, which is 91%, and complex processing of frozen sections3,4. Several other immunohistochemical markers of ganglion cells and nerve fibers that can be stained in formalin-fixed and paraffin-embedded specimens are gradually becoming the mainstream HD diagnostics. Calretinin is a vitamin D-dependent calcium-binding protein that is not expressed in the myenteric and submucosal plexus of HD-affected segments5. S100 protein is expressed in cells derived from the neural crest, such as nerve fibers and glial cells, which often present neural hypertrophy in the submucosal tissue of HD-affected segments6. Protein gene product 9.5 (PGP9.5) reliably stains nerve fibers and ganglion cells; PGP9.5 staining acts as a supplement to calretinin staining, especially in cases of isolated hypoganglionosis. Double staining with S100 and PGP9.5 can decrease the false-negative rate and increase the sensitivity. As a prerequisite, the current study aims to ensure adequate specificity and high sensitivity of this novel diagnostic method. Our novel protocol used all three markers for the discrimination of aganglionic intestine and hypertrophic nerve fibers. A prospective study of 318 children was performed by our lab and previously published without a detailed protocol7. The detailed protocol and precautions are discussed in this article. Any neonates who suffered from a severe defecation problem since birth or children with chronic constipation excluding other common diseases are potential candidates for rectal suction biopsy (RSB). Our novel protocol is suitable for staining not only RSBs but also full-thickness biopsies or surgical specimens to make a final diagnosis.

<table>
	<tbody>
		<tr>
			<td>calretinin antibody</td>
			<td>MXB Biotechnologies</td>
			<td>MAB-0716 170416405c</td>
			<td>antibody: primary antibody</td>
		</tr>
		<tr>
			<td>S-100 antibody</td>
			<td>MXB Biotechnologies</td>
			<td>Kit-0007</td>
			<td>antibody: primary antibody</td>
		</tr>
		<tr>
			<td>PGP9.5 antibody</td>
			<td>Shanghai long island antibody Co. Ltd</td>
			<td>R-0457-03</td>
			<td>antibody: primary antibody</td>
		</tr>
		<tr>
			<td>enhancer reagent</td>
			<td>MXB Biotechnologies</td>
			<td>KIT-9902-A 170416405a</td>
			<td>antibody: secondary antibody A</td>
		</tr>
		<tr>
			<td>Goat anti-Rabbit/Mouse IgG Secondary Antibody</td>
			<td>MXB Biotechnologies</td>
			<td>KIT-9902-B</td>
			<td>antibody: secondary antibody B</td>
		</tr>
		<tr>
			<td>DAB staining kit (containing reagent A B and C)</td>
			<td>MXB Biotechnologies</td>
			<td>DAB-0031</td>
			<td>staining kit</td>
		</tr>
		<tr>
			<td>Heat incubator</td>
			<td>Shanghai yiheng instrument Co. Ltd</td>
			<td>DHP-9082</td>
			<td>instrument</td>
		</tr>
		<tr>
			<td>Rbi2 suction rectal biopsy system</td>
			<td>Aus Systems Pty Ltd, South Australia, Australia</td>
			<td>CP1200 HP1000 SS1000</td>
			<td>instrument</td>
		</tr>
		<tr>
			<td>microtome</td>
			<td>Leica</td>
			<td>leica RM2016</td>
			<td>instrument</td>
		</tr>
		<tr>
			<td>citric acid sodium citrate buffer(100X)</td>
			<td>MXB Biotechnologies</td>
			<td>MVS-0101</td>
			<td>antigen retrieval buffer</td>
		</tr>
		<tr>
			<td>pathological tissue dehydrator</td>
			<td>wuhan junjie electronic Co. Ltd</td>
			<td>JT-12F</td>
			<td>instrument</td>
		</tr>
	</tbody>
</table>

diagnosis of hirschsprung's disease by immunostaining rectal suction biopsies for calretinin, s100 protein and protein gene product 9.5

Hirschsprung&#39;s disease (HD) is a congenital intestinal disease that is clinically manifested as an inability to pass meconium in infants or as long-term constipation in children. Rectal suction biopsy (RSB) to determine the absence of ganglion cells and neural hypertrophy is the most accurate test for the diagnosis of HD at present. Traditional hematoxylin-eosin staining lacks sensitivity and specificity. Acetylcholinesterase staining cannot be widely used due to its complex process. Our novel protocol of immunostaining for calretinin, S100 protein, and protein gene product 9.5 (PGP9.5), which we conducted on RSBs, exhibits high sensitivity and specificity rates of 96.49% (95% confidence interval, 0.88-0.99) and 100% (95% confidence interval, 0.97-1.00), respectively. The HD-affected segments often present as the absence of the expression of calretinin, S100 protein, and PGP9.5, which are markers of neural hypertrophy in the submucosal tissue. This protocol describes the detailed operating process of this new diagnostic method.

In total, 318 patients were enrolled in our study. All of the patients underwent RSB, and the tissues were stained for calretinin, S100, and PGP9.5. The diagnosis based on our novel protocol was HD in 97 cases, non-HD in 213 cases, and suspected HD in 8 cases. Among the 132 surgical patients, 99 patients were diagnosed with HD by immunostaining of full-thickness specimens after surgery. S100 and PGP9.5 staining showed that 92% and 93% of the 99 patients, respectively, had hypertrophied ne...

Watch this Scientific Journal Video about Diagnosis of Hirschsprung's Disease by Immunostaining Rectal Suction Biopsies for Calretinin, S100 Protein and Protein Gene Product 9.5 at JoVE.com

Diagnosis of Hirschsprung's Disease by Immunostaining Rectal Suction Biopsies for Calretinin, S100 Protein and Protein Gene Product 9.5

This protocol describes the process of immunostaining rectal suction biopsies for calretinin, S100 protein, and protein gene product 9.5. This novel adjuvant diagnostic method for Hirschsprung&#39;s disease has preferable sensitivity and specificity rates.

Hirschsprung&#39;s disease (HD) is a congenital intestinal disease that is clinically manifested as an inability to pass meconium in infants or as ...

This method can help answer questions in the diagnosis of Hirschsprung's disease. The method and functions of this technique, if you follow protocol, exhibits high sensitivity and the specificity rates which process at the same time. Demonstrating the procedure will be Mijing Fang, a technician from my laboratory.Begin by fixing the rectal suction biopsies in five times the volume of the tissue in 4%paraformaldehyde for six hours at room temperature. Dehydrate the fixed tissues in a pathological tissue dehydrator for 11 hours and embed the processed rectal suction biopsy tissues in paraffin blocks. Trim the blocks on a microtome until a complete section plane of the tissue is exposed.Then use the microtome to obtain a 0.4 micrometer sections of the embedded tissue. Place in 45 to 50 degree Celsius water to allow the sections to spread into a flat plan. Transfer the flattened sections onto glass slides and bake them in a 60 degree Celsius oven for three to five hours.Place the deparaffinized slides into two 15-minute changes of xylene followed by their hydration in sequential five-minute ethanol immersions. Then rinse the slides in reverse osmosis purified water for an additional five minutes. For antigen retrieval, place the slides in a Coplin staining jar of retrieval solution and place the jar into a preheated bath of boiling water.After 20 minutes, allow the jar to cool to room temperature for about 10 minutes and gently rinse the slides with PBS. Then use a hydrophobic marker to encircle each tissue section and place the slides into a wet box. To block any peroxidates, add two or three drops of 3%hydrogen peroxide solution onto each tissue and place the slides at 37 degrees Celsius for 20 minutes.At the end of the incubation, rinse the slides with three five-minute PBS washes followed by blocking with 5%bovine serum albumin for 20 minutes at 37 degrees Celsius. Next, discard the excess bovine serum albumin and label the cells with 50 microliters of the primary antibody of interest at 4 degrees Celsius overnight. The next morning, rinse the slides with three three-minute washes in PBS and add 50 microliters of polymer enhancer to each slide.After 20 minutes at 37 degrees Celsius, wash the slides three times in PBS and add 50 microliters of secondary antibody B to each tissue section. After 30 minutes at 37 degrees Celsius, rinse the sections with three five-minute washes in PBS and add a drop of freshly prepared DAB working solution to each slide. When the appropriate level of brown staining is detected by light microscopy, rinse the slides in PBS for five minutes and counter stain the nuclei with one drop of hematoxylin for one minute.Remove the excess stain under a trickle of water for approximately 30 to 40 seconds followed by a 25 to 30 second wash in fresh PBS. Differentiate the tissues in 1%hydrochloric acid ethanol for 10 seconds followed by a one-minute PBS wash. Dehydrate the slides with five-minute immersions in the reverse order of hydration and expose the slides to two five-minute changes of xylene.Then mount the cover slip using ultra-clean mounting and allow the slides to dry before their visualization on a light microscope. In this representative study of 318 rectal section biopsy patients, 99 patients were initially diagnosed by rectal section biopsy. Many ganglion cells which express calretinin were observed in normal tissue biopsies.However, no ganglion cells were detected in any area of the tissue from the Hirschsprung's disease segments. S-100 and PGP9.5 immunostaining revealed hypertrophied nerve trunks in the submucosa of the diseased tissue with only granular staining of some small nerve twigs observed in the normally innervated intestine. While attempting this procedure, it is important to remember to pay attention to details like size of rectal suction biopsies and thickness of sections.After it is defragmented, this technique will pave the way for researches in the field of pediatric surgery to support a diagnosis of Hirschsprung's disease.

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