We thank Jonathan Rodenfels, Kazimierz Tycowski, and Johanna B. Withers for advice on data analysis. We also thank G. Hayward for the anti-SSB antibody. This work was supported by grants T32GM007223 and T32AI055403 from the National Institutes of Health (to TKV) and NIH grant (CA16038) (to JAS). JAS is an investigator of the Howard Hughes Medical Institute. Figures 1-3&#160;and Table 1 were reproduced with permission from the American Society for Microbiology under a Creative Commons Attribution license from the following publication: Vallery, T. K., Withers, J. B., Andoh, J. A., Steitz, J. A. Kaposi&#39;s Sarcoma-Associated Herpesvirus mRNA Accumulation in Nuclear Foci Is Influenced by Viral DNA Replication and Viral Noncoding Polyadenylated Nuclear RNA. Journal of Virology.&#160;92 (13), doi:10.1128/JVI.00220-18, (2018).

1. Design of fluorescence in situ (FISH) anti-sense oligonucleotides to detect a specific herpesviral transcript
<ol>
	<li>Select 25 to 40 nt segments from the sequence of RNA of interest and convert to be anti-sense. A successful FISH strategy may contain from one up to ten or more different anti-sense oligonucleotides. When selecting sequences, consider the following:
	<ol>
		<li>If the RNA of interest contains a unique repeat region, then capitalize on this feature and design an anti-sense oligonucleotide to target ...

<ol>
	<li>Amen, M. A., Griffiths, A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Packaging+of+Non-Coding+RNAs+into+Herpesvirus+Virions:+Comparisons+to+Coding+RNAs.">Packaging of Non-Coding RNAs into Herpesvirus Virions: Comparisons to Coding RNAs.</a> Frontiers in Genetics. 2, 81 (2011).</li><li>Schmid, M., Speiseder, T., Dobner, T., Gonzalez, R. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=DNA+virus+replication+compartments.">DNA virus replication compartments.</a> Journal of Virology. 88 (3), 1404-1420 (2014).</li><li>Pawlicki, J. M., Steitz, J. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Primary+microRNA+transcript+retention+at+sites+of+transcription+leads+to+enhanced+microRNA+production.">Primary microRNA transcript retention at sites of transcription leads to enhanced microRNA production.</a> Journal of Cell Biology. 182 (1), 61-76 (2008).</li><li>Borah, S., Darricarrere, N., Darnell, A., Myoung, J., Steitz, J. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=A+viral+nuclear+noncoding+RNA+binds+re-localized+poly(A)+binding+protein+and+is+required+for+late+KSHV+gene+expression.">A viral nuclear noncoding RNA binds re-localized poly(A) binding protein and is required for late KSHV gene expression.</a> Public Library of Science Pathogens. 7 (10), e1002300 (2011).</li><li>Tycowski, K. T., Shu, M. D., Borah, S., Shi, M., Steitz, J. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Conservation+of+a+triple-helix-forming+RNA+stability+element+in+noncoding+and+genomic+RNAs+of+diverse+viruses.">Conservation of a triple-helix-forming RNA stability element in noncoding and genomic RNAs of diverse viruses.</a> Cell Reports. 2 (1), 26-32 (2012).</li><li>Weinberg, R. A., Penman, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Small+molecular+weight+monodisperse+nuclear+RNA.">Small molecular weight monodisperse nuclear RNA.</a> Journal of Molecular Biology. 38 (3), 289-304 (1968).</li><li>Myoung, J., Ganem, D. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Generation+of+a+doxycycline-inducible+KSHV+producer+cell+line+of+endothelial+origin:+maintenance+of+tight+latency+with+efficient+reactivation+upon+induction.">Generation of a doxycycline-inducible KSHV producer cell line of endothelial origin: maintenance of tight latency with efficient reactivation upon induction.</a> Journal of Virology Methods. 174 (1-2), 12-21 (2011).</li><li>Brulois, K. F., 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=Construction+and+manipulation+of+a+new+Kaposi's+sarcoma-associated+herpesvirus+bacterial+artificial+chromosome+clone.">Construction and manipulation of a new Kaposi's sarcoma-associated herpesvirus bacterial artificial chromosome clone.</a> Journal of Virology. 86 (18), 9708-9720 (2012).</li><li>Sturzl, M., Gaus, D., Dirks, W. G., Ganem, D., Jochmann, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Kaposi's+sarcoma-derived+cell+line+SLK+is+not+of+endothelial+origin,+but+is+a+contaminant+from+a+known+renal+carcinoma+cell+line.">Kaposi's sarcoma-derived cell line SLK is not of endothelial origin, but is a contaminant from a known renal carcinoma cell line.</a> International Journal of Cancer. 132 (8), 1954-1958 (2013).</li><li>Chiou, C. J., 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=Patterns+of+gene+expression+and+a+transactivation+function+exhibited+by+the+vGCR+(ORF74)+chemokine+receptor+protein+of+Kaposi's+sarcoma-associated+herpesvirus.">Patterns of gene expression and a transactivation function exhibited by the vGCR (ORF74) chemokine receptor protein of Kaposi's sarcoma-associated herpesvirus.</a> Journal of Virology. 76 (7), 3421-3439 (2002).</li><li>Cole, R. W., Jinadasa, T., Brown, C. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Measuring+and+interpreting+point+spread+functions+to+determine+confocal+microscope+resolution+and+ensure+quality+control.">Measuring and interpreting point spread functions to determine confocal microscope resolution and ensure quality control.</a> Nature Protocols. 6 (12), 1929-1941 (2011).</li><li>Nakamura, H., 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=Global+changes+in+Kaposi's+sarcoma-associated+virus+gene+expression+patterns+following+expression+of+a+tetracycline-inducible+Rta+transactivator.">Global changes in Kaposi's sarcoma-associated virus gene expression patterns following expression of a tetracycline-inducible Rta transactivator.</a> Journal of Virology. 77 (7), 4205-4220 (2003).</li><li>Majerciak, V., Yamanegi, K., Zheng, Z. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Gene+structure+and+expression+of+Kaposi's+sarcoma-associated+herpesvirus+ORF56,+ORF57,+ORF58,+and+ORF59.">Gene structure and expression of Kaposi's sarcoma-associated herpesvirus ORF56, ORF57, ORF58, and ORF59.</a> Journal of Virology. 80 (24), 11968-11981 (2006).</li><li>Sun, R., Lin, S. F., Gradoville, L., Miller, G. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Polyadenylylated+nuclear+RNA+encoded+by+Kaposi+sarcoma-associated+herpesvirus.">Polyadenylylated nuclear RNA encoded by Kaposi sarcoma-associated herpesvirus.</a> Proceedings of the National Academy Sciences U S A. 93 (21), 11883-11888 (1996).</li><li>Vallery, T. K., Withers, J. B., Andoh, J. A., Steitz, J. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Kaposi's+Sarcoma-Associated+Herpesvirus+mRNA+Accumulation+in+Nuclear+Foci+Is+Influenced+by+Viral+DNA+Replication+and+Viral+Noncoding+Polyadenylated+Nuclear+RNA.">Kaposi's Sarcoma-Associated Herpesvirus mRNA Accumulation in Nuclear Foci Is Influenced by Viral DNA Replication and Viral Noncoding Polyadenylated Nuclear RNA.</a> Journal of Virology. 92 (13), (2018).</li><li>Borah, S., Nichols, L. A., Hassman, L. M., Kedes, D. H., Steitz, J. A. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Tracking+expression+and+subcellular+localization+of+RNA+and+protein+species+using+high-throughput+single+cell+imaging+flow+cytometry.">Tracking expression and subcellular localization of RNA and protein species using high-throughput single cell imaging flow cytometry.</a> RNA. 18 (8), 1573-1579 (2012).</li><li>Bruce, A. G., 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=Quantitative+Analysis+of+the+KSHV+Transcriptome+Following+Primary+Infection+of+Blood+and+Lymphatic+Endothelial+Cells.">Quantitative Analysis of the KSHV Transcriptome Following Primary Infection of Blood and Lymphatic Endothelial Cells.</a> Pathogens. 6 (1), (2017).</li><li>Chen, C. P., 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=Kaposi's+Sarcoma-Associated+Herpesvirus+Hijacks+RNA+Polymerase+II+To+Create+a+Viral+Transcriptional+Factory.">Kaposi's Sarcoma-Associated Herpesvirus Hijacks RNA Polymerase II To Create a Viral Transcriptional Factory.</a> Journal of Virology. 91 (11), (2017).</li></ol>

The authors have no conflicts of interest to disclose.

The protocol described in this report can be adapted to different cell types and includes steps for double RNA FISH and RNA FISH with IF using both monoclonal and polyclonal primary antibodies. Although prepared slides are typically imaged with a confocal microscope, imaging can be performed with a STED (stimulated emission depletion) microscope after modifications of increased antibody concentration and a different mounting medium. For enhanced analysis of individual cells, samples prepared with this protocol may also b...

In their lytic (active) phase, herpesviruses hijack the host cell, causing changes in cell morphology and localization of biological molecules, to produce virions. The base of operations is the nucleus, where the double-stranded DNA viral genome is replicated and packaged into a protein shell, called a capsid1. To begin, the virus expresses its own proteins, hijacking host machinery and preventing expression of non-essential host genes, a process termed the host shutoff effect. The majority of this activity is localized to specific 4&#8242;,6-diamidino-2-phenylindole (DAPI)-free nuclear regions called viral replication compartments, comprised of both host and viral proteins, RNAs, and viral DNA2. The cell is overhauled to provide space and resources for the replication compartments and thus assembly of viral capsids. Once the capsid exits the nucleus, how the capsid is enveloped in the cytoplasm to produce a membrane-bound viral particle, also known as a virion, is unclear. Understanding of the localization and spatial shifts of both host and viral biomolecules during the lytic phase provides deeper mechanistic insight into the arrangement of the replication compartment, host shutoff effect, the virion-egress pathway, and other processes related to herpesviral infection and replication.
Currently the best method to detect and study these changes is the visualization of proteins and RNAs in infected cells with immunofluorescence (IF) and fluorescent in situ hybridization (FISH), respectively. Use of a time-course with these techniques reveals the localization of biomolecules at key points of the lytic phase or simply, spatiotemporal data. FISH and IF complement other biochemical techniques, such as inhibition of a cellular process (e.g., inhibition of viral DNA replication), RT-qPCR (real-time polymerase chain reaction), RNA sequencing, Northern blots, mass spectrometry, Western blotting, and analysis of viral DNA production, that may provide a more global picture of cellular activities.
We developed RNA FISH strategies to examine the RNA products from specific genes and a computational analysis that quantitatively calculates the nucleocytoplasmic ratio of a specific gene product. The sample preparation, modified from earlier publications by Steitz and colleagues3,4, is relatively easy and can be used for both adherent and suspended cells. The protocol is also adaptable for simultaneous use of multiple RNA FISH strategies (double RNA FISH) or RNA FISH with IF strategies. Development of a specific FISH strategy is challenging, but suggestions to improve success are outlined. The data analysis described here is quantitative if fluorescent beads and strong markers of compartment boundaries are used and offers additional insight into the micrographs, insight that removes observation bias. The detailed protocol is designed for both latent and lytic cells infected by Kaposi&#39;s sarcoma-associated herpesvirus (KSHV) and can be used with uninfected cells or cells infected by other herpesviruses5. The methods of quantitation are applicable to studies on nucleocytoplasmic shifts or relocalization between subcellular compartments in most cells.

<table border="0" cellpadding="0" cellspacing="0" style="width:947px;" width="948">
	<tbody>
		<tr height="21">
			<td height="21" style="height:21px;width:361px;">AlexaFluor594-5-dUTP</td>
			<td style="width:191px;">Life Technologies</td>
			<td style="width:117px;">C1100</td>
			<td style="width:277px;"></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">anti-DIG FITC&#160;</td>
			<td>Jackson Lab Immunologicals</td>
			<td>200-092-156</td>
			<td style="width:277px;"></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Anti-Rabbit Secondary AlexaFluor594 Monoclonal Antibody</td>
			<td>Invitrogen</td>
			<td>A-11037</td>
			<td>Goat</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Anti-SSB Antibody</td>
			<td>N/A</td>
			<td>N/A</td>
			<td>Ref. Chiou et al. 2002</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">BLASTn</td>
			<td>NIH NCBI</td>
			<td>N/A</td>
			<td style="width:277px;">Free Sequence Alignment Software</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Dextran Sulfate</td>
			<td>Sigma Aldrich</td>
			<td>D8906</td>
			<td style="width:277px;">Molecular Biology Grade</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">DIG-Oligonucleotide Tailing Kit</td>
			<td>Sigma Roche</td>
			<td>#03353583910</td>
			<td style="width:277px;">2nd Gen</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;">Eight-Chamber Slides</td>
			<td>Nunc Lab Tek II</td>
			<td>#154453</td>
			<td style="width:277px;">Blue seal promotes surface tension but separation by clear gel is also available.&#160;</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Formamide</td>
			<td>Sigma Aldrich</td>
			<td>F9037</td>
			<td style="width:277px;">Molecular Biology Grade</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">GAPDH Probes</td>
			<td>Stellaris</td>
			<td>SMF-2019-1</td>
			<td style="width:277px;">Compatible with protocol, Quasar 670</td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;">ImageJ&#160;</td>
			<td>NIH, Bethesda, MD</td>
			<td>N/A</td>
			<td style="width:277px;">Free Image Analysis Software, [http:rsb.info.nih.gov/ij/]</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">OligoAnalyzer</td>
			<td>IDT</td>
			<td>N/A</td>
			<td style="width:277px;">Free Oligonucleotide Analyzer&#160;</td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">pcDNA3</td>
			<td>Invitrogen</td>
			<td>A-150228</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">pmaxGFP</td>
			<td>Amaxa</td>
			<td>VDF-1012</td>
			<td></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Poly L-Lysine</td>
			<td>Sigma Aldrich</td>
			<td>P8920</td>
			<td style="width:277px;"></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Terminal Transferase</td>
			<td>Sigma Roche</td>
			<td>#003333574001</td>
			<td style="width:277px;"></td>
		</tr>
		<tr height="21">
			<td height="21" style="height:21px;">Vanadyl Ribonucleoside Complexes&#160;</td>
			<td>NEB</td>
			<td>S1402S</td>
			<td style="width:277px;"></td>
		</tr>
		<tr height="42">
			<td height="42" style="height:42px;">Vectashield</td>
			<td>Vector Laboratories, Inc.&#160;</td>
			<td>H-1000</td>
			<td style="width:277px;">DAPI within the mounting media scatters the light and reduces contrast.&#160;</td>
		</tr>
	</tbody>
</table>

quantitative fluorescence in situ hybridization (fish) and immunofluorescence (if) of specific gene products in kshv-infected cells

Mechanistic insight arrives from careful study and quantification of specific RNAs and proteins. The relative locations of these biomolecules throughout the cell at specific times can be captured with fluorescence in situ hybridization (FISH) and immunofluorescence (IF). During lytic herpesvirus infection, the virus hijacks the host cell to preferentially express viral genes, causing changes in cell morphology and behavior of biomolecules. Lytic activities are centered in nuclear factories, termed viral replication compartments, which are discernable only with FISH and IF. Here we describe an adaptable protocol of RNA FISH and IF techniques for Kaposi's sarcoma-associated herpesvirus (KSHV)-infected cells, both adherent and in suspension. The method includes steps for the development of specific anti-sense oligonucleotides, double RNA FISH, RNA FISH with IF, and quantitative calculations of fluorescence intensities. This protocol has been successfully applied to multiple cell types, uninfected cells, latent cells, lytic cells, time-courses, and cells treated with inhibitors to analyze the spatiotemporal activities of specific RNAs and proteins from both the human host and KSHV.

The FISH and IF methods detailed in this manuscript are shown in Figure 1 along with the quantification of results by line traces of fluorescent intensity. The results presented here are semi-quantitative and offer insight into localization, rather than into comparisons between intensities of different fluorescent stains because experiments did not include a fluorescent bead in the slide preparation. Figure 1 also reveals that th...

Watch this Scientific Journal Video about Quantitative Fluorescence In Situ Hybridization FISH and Immunofluorescence IF of Specific Gene Products in KSHV-Infected Cells at JoVE.com

Quantitative Fluorescence In Situ Hybridization FISH and Immunofluorescence IF of Specific Gene Products in KSHV-Infected Cells

We describe a protocol utilizing fluorescence in situ hybridization (FISH) to visualize multiple herpesviral RNAs within lytically infected human cells, either in suspension or adherent. This protocol includes quantification of fluorescence producing a nucleocytoplasmic ratio and can be extended for simultaneous visualization of host and viral proteins with immunofluorescence (IF).

Quantitative Fluorescence In Situ Hybridization (FISH) and Immunofluorescence (IF) of Specific Gene Products in KSHV-Infected Cells

Mechanistic insight arrives from careful study and quantification of specific RNAs and proteins. The relative locations of these biomolecules throughout ...

The protocol is helpful for gaining quantitative insight into the temporal regulation of viral gene products, within the context of host cells, especially in relation to herpes viruses. This technique can help address research questions related to both host and viral RNAs and proteins. Moreover, this technique is compatible with simultaneous biochemical assays.To adhere the cells to eight chamber slides, apply 200 microliters of an inherent cell suspension to each chamber of a sterile, eight chambered slide and allow seed growth for 12-24 hours, at 37 degrees Celsius, and 5%carbon dioxide. At the end of the incubation, aspirate the supernatant and unattached cells, and immediately fix the cells with pre-chilled 4%formaldehyde in PBS on ice, for 30 minutes. At the end of the fixation, wash the cells with three, five minute washes in 200 microliters of 4 degree Celsius PBS per wash.After the last wash, permeabilize the fixed cells with 200 microliters of pre-chilled 0.5%Triton-X in PBS per well, for 10 minutes on ice. At the end of the permeabilization, carefully remove the chambers without cracking the slide, and rinse the cells with pre-chilled PBS. Block the rinsed cells with pre-chilled 4%BSA in PBS for 30 minutes at four degrees Celsius, followed by incubation with appropriate polyclonal primary antibody of interest in 0.1%BSA in PBS for one hour, at four degrees Celsius.At the end of the incubation, wash the cells three times with fresh PBS and incubate the cells with an appropriate secondary antibody conjugated with a fluorophoric compatible with the FISH detecting antibody for one hour, at four degrees Celsius. After three PBS washes as demonstrated, fix the samples again in 4%formaldehyde in PBS for 10-15 minutes before a second permeablization as demonstrated. Then cover the slide with aluminum foil to preserve the fluorescent signal and prevent photobleaching.And wash the cells with 2x saline sodium citrate, before applying 45 microliters of hybridization solution. After one hour at 37 degrees Celsius in a humidified chamber, add distilled water to the antisense oligonucleotides of interest to bring the denaturation volume to 10 microliters. Denature the oligonucleotides at 95 degrees Celsius for five minutes, before adding 35 microliters of fresh hybridization solution per slide.Then incubate the samples from 10-24 hours in the humidified chamber at 37 degrees Celsius, protected with foil. The next day, wash the cells with two, 10 minute. 2X saline sodium citrate washes at room temperature, followed by one wash in 1X saline sodium citrate for 10 minutes, at 25 degrees Celsius.After the last wash, fix the cells with pre-chilled 4%formaldehyde in PBS, for 10-15 minutes on ice, followed by three washes with fresh PBS. Next, permeabilize the samples as demonstrated, followed by incubation with anti-dioxigenin FTC and pre-chilled 0.1%BSA in PBS, for one hour at four degrees Celsius. At the end of the incubation, wash the slides three times in fresh PBX, and fix the samples with pre-chilled 4%paraformaldehyde in PBS, for 10-15 minutes at four degrees Celsius.After three washes in PBS, label the nuclei with 0.4 micrograms per milliliter of DAPI and pre-chilled 0.5%Triton-X in PBS for 15 minutes on ice, followed by three final washes in PBS. Mount slides with fluorescent beads, as experimentally relevant and in appropriate mounting medium. After removing excess mounting medium with sterile wipes, seal one coverslip to each slide with multiple coats of clear nail polish, and use a fluorescent microscope to confirm successful execution of the experiment.Images may then be taken on a confocal microscope to collect images of the samples within an hour to a week of mounting, at a 630 times magnification. These representative FISH and immunofluorescence results are semiquantitative and offer insight into oligonucleotide localization, rather than into comparisons between the intensities of the different fluorescent stains, because these experiments did not include a fluorescent bead in the slide preparation. In these experiments, the cytoplasmic and nuclear areas and their ratios were different for latent and lytic KSHV infected cells.As illustrated in this figure, area is controlled in the nucleocytoplasmic ratio. When KSHV DNA replication is inhibited in the lytic phase, the early lytic protein of KSHV oligonucleotide transcript shifts to a predominantly cytoplasmic localization. KSHV polyadenylated RNA, however, localizes to specific nuclear sites despite the inhibition of viral DNA replication.When removing the chambers from the slides, take care that there's very little adhesive residue on the tool, and use ethanol to permeablize the cells and weaken the adhesive. Biochemical assays such as QPCR, Western blot, and high-throughput sequencing, can be performed in tandem to augment the quantitative data collected from the micrographs.

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JoVE Journal

Immunology and Infection

11.9K Views.  Norfolk Academy. Il protocollo è utile per ottenere una visione quantitativa della regolazione temporale dei prodotti genetici virali, nel contesto delle cellule ospiti, specialmente in relazione ai virus dell'herpes. Questa tecnica può aiutare ad affrontare le domande di ricerca relative sia agli RNA e alle proteine ospiti che virali. Inoltre, questa tecnica è compatibile con saggi biochimici simultanei.Per aderire alle cellule a otto vetrini da camera, applicare 200 microlitri di una sospensione c...