Name: in situ detection of bacteria within paraffin-embedded tissues using a digoxin-labeled dna probe targeting 16s rrna
Uploaded: 2015-05-21T13:00:00
Description: Watch this Scientific Journal Video about In Situ Detection of Bacteria within Paraffin-embedded Tissues Using a Digoxin-labeled DNA Probe Targeting 16S rRNA at JoVE.com

This study was supported by a grant (2013R1A1A3005669) from the National Research Foundation of Korea and a grant (HI13C0016) of the Korean Health Technology R&#38;D Project, Ministry of Health &#38; Welfare.

1. Probe Preparation
<ol>
	<li>PCR amplification of the probe
	<ol>
		<li>For the P. gingivalis&#8211;specific probe, amplify a 343-bp DNA fragment of P. gingivalis 16S rRNA by PCR using the genomic DNA of P. gingivalis and the following primers: 5&#39;- TGC AAC TTG CCT TAC AGA GG-3&#39; and 5&#39;- ACT CGT ATC GCC CGT TAT TC-3&#39;10. Perform amplifications with the following cycle conditions: 35 cycles at 95 &#176;C for 30 sec, 60 &#176;C for 30 sec, and 72 &#176;C for 1 min 20 s...

<ol>
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P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Identification+of+intracellular+oral+species+within+human+crevicular+epithelial+cells+from+subjects+with+chronic+periodontitis+by+fluorescence+in+situ.+hybridization.">Identification of intracellular oral species within human crevicular epithelial cells from subjects with chronic periodontitis by fluorescence in situ. hybridization.</a> J. Periodontal Res. 42 (3), 236-243 (2007).</li><li>Abrams, K., Caton, J., Polson, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Histologic+comparisons+of+interproximal+gingival+tissues+related+to+the+presence+or+absence+of+bleeding.">Histologic comparisons of interproximal gingival tissues related to the presence or absence of bleeding.</a> J. Periodontol. 55 (11), 629-632 (1984).</li><li>Kim, Y. C., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Presence+of+Porphyromonas+gingivalis.+and+plasma+cell+dominance+in+gingival+tissues+with+periodontitis.">Presence of Porphyromonas gingivalis. and plasma cell dominance in gingival tissues with periodontitis.</a> Oral Dis. 16 (4), 375-381 (2010).</li><li>Choi, Y. S., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Porphyromonas+gingivalis.+and+dextran+sodium+sulfate+induce+periodontitis+through+the+disruption+of+physical+barriers.">Porphyromonas gingivalis. and dextran sodium sulfate induce periodontitis through the disruption of physical barriers.</a> Eur. J. Inflammation. 10, 419-431 (2013).</li><li>Choi, Y. S., Kim, Y. 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Here a protocol to localize bacteria within paraffin-embedded tissues using a DIG-labeled DNA probe has been described. The probe targets the DNA or RNA molecules of bacterial 16S rRNA gene, and the 16S rRNA-targeting probes can be designed as either species-specific or universal. The specific hybridization of the P. gingivalis-specific probe to P. gingivalis but not to other oral bacteria has been previously shown10. In contrast, the eubacterial probe hybridized to all bacterial genomic DNA ...

Bacteria play a role in the etiology of various oral diseases such as periodontitis, pulpitis, pericoronitis, cellulitis, and osteomyelitis. In order to understand the role of bacteria in the pathogenesis of disease and to monitor the effect of treatments, localization of bacteria within the tissue is important. The presence of bacteria within gingival tissue from patients with periodontitis has been shown using various methods, including electron microscopy1,2, immunohistochemistry and immunofluorescence using bacteria-specific antibodies3-7, and fluorescent in situ hybridization (FISH)8 using a fluorescence-labeled oligonucleotide probe targeting 16S rRNA. Nevertheless, these methods are not widely used due to technical limitation or difficulties. Compared with antibodies, probes targeting 16S rRNA are easy to produce and achieve species-specificity. FISH has proven to be an excellent tool for the visualization of bacteria in their natural environments such as plaque biofilm. However, application of FISH to tissue samples is limited due to autofluorescence of various tissue components. For example, the strong autofluorescence of red blood cells often hampers the application of fluorescence technology to inflamed tissues when they involve bleeding9.
In order to localize bacteria within the inflamed gingival tissues, therefore, an in situ hybridization method using a digoxigenin (DIG)-labeled DNA probe has been developed and successfully applied10,11. Here a detailed protocol for the localization of bacteria within paraffin-embedded tissues using P. gingivalis-specific and universal eubacterial probes has been described. It is particularly focused on standardization of the method so that similar results can be reproduced in other laboratories. This protocol allows localization of bacteria within their histological context and the results are highly reproducible. The described protocol can be used to localize bacteria either in a species-specific or universal manner in various tissues. The universal probe is especially useful to detect bacteria in polymicrobial diseases and to study a potential role of bacteria in diseases where the role of specific bacteria is not known.

<table border="0" cellpadding="0" cellspacing="0">
	<tbody>
		<tr>
			<td>Acetic anhydride</td>
			<td>Sigma</td>
			<td>6404</td>
			<td></td>
		</tr>
		<tr>
			<td>50% Dextran sulfate solution</td>
			<td>Millipore</td>
			<td>S4030</td>
			<td></td>
		</tr>
		<tr>
			<td>50X Denhardt&#8217;s solution</td>
			<td>Sigma</td>
			<td>D2532</td>
			<td></td>
		</tr>
		<tr>
			<td>DEPC</td>
			<td>Sigma</td>
			<td>P159220</td>
			<td></td>
		</tr>
		<tr>
			<td>DIG DNA labeling and detection kit</td>
			<td>Roche</td>
			<td>11 093 657 910</td>
			<td></td>
		</tr>
		<tr>
			<td>Formamide</td>
			<td>Sigma</td>
			<td>F9037</td>
			<td></td>
		</tr>
		<tr>
			<td>ImmEdge&#8482; Pen</td>
			<td>Dako</td>
			<td>H-400</td>
			<td></td>
		</tr>
		<tr>
			<td>Levamisole</td>
			<td>Vector</td>
			<td>SP-5000</td>
			<td></td>
		</tr>
		<tr>
			<td>Magnesium chloride</td>
			<td>Sigma</td>
			<td>246964</td>
			<td></td>
		</tr>
		<tr>
			<td>Maleic acid</td>
			<td>Sigma</td>
			<td>M0375</td>
			<td></td>
		</tr>
		<tr>
			<td>Methyl green</td>
			<td>Sigma</td>
			<td>M6776</td>
			<td></td>
		</tr>
		<tr>
			<td>Paraformaldehyde</td>
			<td>Sigma</td>
			<td>P1648</td>
			<td></td>
		</tr>
		<tr>
			<td>Permount</td>
			<td>Fisher</td>
			<td>SP15-500</td>
			<td></td>
		</tr>
		<tr>
			<td>Salmon sperm DNA solution</td>
			<td>Invitrogen</td>
			<td>#15632-011</td>
			<td></td>
		</tr>
		<tr>
			<td>Sodium chloride</td>
			<td>Sigma</td>
			<td>S9625</td>
			<td></td>
		</tr>
		<tr>
			<td>Sodium citrate</td>
			<td>Duksan</td>
			<td>D1420</td>
			<td></td>
		</tr>
		<tr>
			<td>Sodium dodecyl sulfate</td>
			<td>Amresco</td>
			<td>227</td>
			<td></td>
		</tr>
		<tr>
			<td>Triethanolamine-HCl</td>
			<td>Sigma</td>
			<td>90279</td>
			<td></td>
		</tr>
		<tr>
			<td>Tris-HCl</td>
			<td>Research organics</td>
			<td>3098T</td>
			<td></td>
		</tr>
	</tbody>
</table>

in situ detection of bacteria within paraffin-embedded tissues using a digoxin-labeled dna probe targeting 16s rrna

The presence of bacteria within the pocket epithelium and underlying connective tissue in gingival biopsies from patients with periodontitis has been reported using various methods, including electron microscopy, immunohistochemistry or immunofluorescence using bacteria-specific antibodies, and fluorescent in situ hybridization (FISH) using a fluorescence-labeled oligonucleotide probe. Nevertheless, these methods are not widely used due to technical limitation or difficulties. Here a method to localize bacteria within paraffin-embedded tissues using DIG-labeled DNA probes has been introduced. The paraffin-embedded tissues are the most common form of biopsy tissues available from pathology banks. Bacteria can be detected either in a species-specific or universal manner. Bacterial signals are detected as either discrete forms (coccus, rod, fusiform, and hairy form) of bacteria or dispersed forms. The technique allows other histological information to be obtained: the epithelia, connective tissue, inflammatory infiltrates, and blood vessels are well distinguished. This method can be used to study the role of bacteria in various diseases, such as periodontitis, cancers, and inflammatory immune diseases.

Figure 1 shows dot blotting of DIG-labeled probes compared with the positive control probe provided in the kit to determine their sensitivity. The 343 bp P. gingivalis-specific probe is 25 times more sensitive than the 70 bp eubacterial probe. Figure 2 shows in situ hybridization of gingival tissues obtained from patients with chronic periodontitis for detection of P. gingivalis and eubacteria. The bacterial signals, shown in violet, were detected within the ep...

Watch this Scientific Journal Video about In Situ Detection of Bacteria within Paraffin-embedded Tissues Using a Digoxin-labeled DNA Probe Targeting 16S rRNA at JoVE.com

In Situ Detection of Bacteria within Paraffin-embedded Tissues Using a Digoxin-labeled DNA Probe Targeting 16S rRNA

Here a method to localize bacteria within paraffin-embedded tissues using DIG-labeled 16S rRNA-targeting DNA probes has been described. This protocol can be applied to study the role of bacteria in various diseases such as periodontitis, cancers, and inflammatory immune diseases.

In Situ Detection of Bacteria within Paraffin-embedded Tissues Using a Digoxin-labeled DNA Probe Targeting 16S rRNA

The presence of bacteria within the pocket epithelium and underlying connective tissue in gingival biopsies from patients with periodontitis has been ...

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