<meta charset="utf8"></head><body>Nauwkeurige beoordeling van de telomeerlengte in studies naar de menselijke populatie

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Q., 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=Ambient+air+pollution+exposure+and+telomere+length:+A+systematic+review+and+meta-analysis.">Ambient air pollution exposure and telomere length: A systematic review and meta-analysis.</a> Public Health. 215, 42-55 (2023).</li><li>Tang, L., Li, D., Wang, J., Su, B., Tian, Y. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Ambient+air+pollution,+genetic+risk+and+telomere+length+in+uk+biobank.">Ambient air pollution, genetic risk and telomere length in uk biobank.</a> J Expo Sci Environ Epidemiol. , (2023).</li><li>Aubert, G., Hills, M., Lansdorp, P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Telomere+length+measurement-caveats+and+a+critical+assessment+of+the+available+technologies+and+tools.">Telomere length measurement-caveats and a critical assessment of the available technologies and tools.</a> Mutat Res. 730 (1), 59-67 (2012).</li><li>Lin, 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=Systematic+and+cell+type-specific+telomere+length+changes+in+subsets+of+lymphocytes.">Systematic and cell type-specific telomere length changes in subsets of lymphocytes.</a> J Immunol Res. 2016, 5371050 (2016).</li><li>Needham, B. L., 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=Socioeconomic+status,+health+behavior,+and+leukocyte+telomere+length+in+the+national+health+and+nutrition+examination+survey,+1999-2002.">Socioeconomic status, health behavior, and leukocyte telomere length in the national health and nutrition examination survey, 1999-2002.</a> Soc Sci Med. 85, 1-8 (2013).</li><li>Verhulst, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Improving+comparability+between+qpcr-based+telomere+studies.">Improving comparability between qpcr-based telomere studies.</a> Mol Ecol Res. 20 (1), 11-13 (2020).</li><li>Dagnall, C. L., 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=Effect+of+pre-analytic+variables+on+the+reproducibility+of+qpcr+relative+telomere+length+measurement.">Effect of pre-analytic variables on the reproducibility of qpcr relative telomere length measurement.</a> PloS one. 12 (9), e0184098 (2017).</li><li>Lin, J., Smith, D. L., Esteves, K., Drury, S. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Telomere+length+measurement+by+qpcr-summary+of+critical+factors+and+recommendations+for+assay+design.">Telomere length measurement by qpcr-summary of critical factors and recommendations for assay design.</a> Psychoneuroendocrinology. 99, 271-278 (2019).</li><li>Wolf, S. E., 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=Cross-tissue+comparison+of+telomere+length+and+quality+metrics+of+DNA+among+individuals+aged+8+to+70+years.">Cross-tissue comparison of telomere length and quality metrics of DNA among individuals aged 8 to 70 years.</a> PLOS One. 19 (2), e0290918 (2024).</li><li>RoDer, B., FruHwirth, K., Vogl, C., Wagner, M., Rossmanith, P. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Impact+of+long-term+storage+on+stability+of+standard+DNA+for+nucleic+acid-based+methods.">Impact of long-term storage on stability of standard DNA for nucleic acid-based methods.</a> J Clin Microbiol. 48 (11), 4260-4262 (2010).</li><li>Dagnall, 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=Effect+of+pre-analytic+variables+on+the+reproducibility+of+qpcr+relative+telomere+length+measurement.">Effect of pre-analytic variables on the reproducibility of qpcr relative telomere length measurement.</a> PLoS One. 12 (9), e0184098 (2017).</li><li>Shao, W., Khin, S., Kopp, W. 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<table border="1" fo:keep-together.within-page="1" fo:keep-with-next.within-page="always">
	<tbody>
		<tr>
			<td>0.5mL Tubes</td>
			<td>USA Scientific</td>
			<td>1605-0099</td>
			<td>Seal-Rite 0.5mL Microcentrifuge Tubes, Sterile 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>1.5mL Tubes</td>
			<td>USA Scientific</td>
			<td>1615-5599</td>
			<td>Seal-Rite 1.5mL Microcentrifuge Tubes, Sterile 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>100mM DTT</td>
			<td>In House</td>
			<td>Not Applicable</td>
			<td>Made with stock DTT, diluted sodium acetate, and PCR Grade H2O 
			Storage Temperature and Conditions: minus 20 &#176;C&#160;</td>
		</tr>
		<tr>
			<td>15mL Tubes</td>
			<td>Thermo Fisher</td>
			<td>14-959-53A</td>
			<td>Corning 352196 Falcon 15mL Conical Centrifuge Tubes 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>1M MgCl2</td>
			<td>Thermo Fisher</td>
			<td>50152107</td>
			<td>Biotang Inc 1M MgCl2 1M Magnesium Chloride Solution, Prepared in 18.2 Megohms Water and Filtered through 0.22 Micron Filter 
			Storage Temperature and Conditions: 4 &#176;C&#160;</td>
		</tr>
		<tr>
			<td>1x Gold Buffer</td>
			<td>In House</td>
			<td>Not Applicable</td>
			<td>10X Gold Buffer diluted with PCR Grade H2O 
			Storage Temperature and Conditions: minus 20 &#176;C&#160;</td>
		</tr>
		<tr>
			<td>25mM dNTPs</td>
			<td>New England BioLabs</td>
			<td>N0446S</td>
			<td>Deoxynucleotide Solution Set 
			Storage Temperature and Conditions: minus 20 &#176;C&#160;</td>
		</tr>
		<tr>
			<td>5mL Tubes</td>
			<td>Thermo Fisher</td>
			<td>3391276</td>
			<td>Argos Technologies Microcentrifuge Tubes &#8211; 5mL 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>96 Well Plate</td>
			<td>Bio-Rad</td>
			<td>HSP9601</td>
			<td>Hard-Shell 96-Well PCR Plates, Low Profile, Thin Wall, Skirted, White / Clear 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Aluminum Foil</td>
			<td>Office Depot</td>
			<td>3489072</td>
			<td>Reynolds Wrap Stanard Aluminum Foil Roll, 12&#34; x 75&#39;, Silver 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>AmpliTaq Gold Kit &#8211; Polymerase and Buffer</td>
			<td>Thermo Fisher</td>
			<td>4311806</td>
			<td>AmpliTaq Gold DNA Polymerase with Gold Buffer and MgCl2 (MgCl2 in this kit is not used), 10X Gold Buffer, 2.5U AmpliTaq Gold Polymerase 
			Storage Temperature and Conditions: minus 20 &#176;C&#160;</td>
		</tr>
		<tr>
			<td>Betaine</td>
			<td>Thermo Fisher</td>
			<td>AAJ77507AB</td>
			<td>Betaine, 5M Solution, Molecular Biology Grade, Ultrapure, 10mL 
			Storage Temperature and Conditions: minus 20 &#176;C&#160;</td>
		</tr>
		<tr>
			<td>Big Tube Rack</td>
			<td>Thermo Fisher</td>
			<td>344817</td>
			<td>Fisherbrand 4-Way Tube Rack 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>CFX Maestro Software</td>
			<td>Bio-Rad</td>
			<td>12004110</td>
			<td>Software for real-time PCR plate setup, data collection, statistics, and graphiing of results 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>CFX96 Optical Reaction Module for Real-Time PCR Systems with Starter Package</td>
			<td>Bio-Rad</td>
			<td>1845096</td>
			<td>96-well optical module for real-time PCR 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>DTT</td>
			<td>Fisher Scientific</td>
			<td>AAJ1539706</td>
			<td>Dithiothreitol, &#62;99.5+ Molecular Biology Grade, 5 g 
			Storage Temperature and Conditions: minus 20 &#176;C&#160;</td>
		</tr>
		<tr>
			<td>ELIMINase</td>
			<td>Fisher Scientific</td>
			<td>04-355-32</td>
			<td>ELIMINase Laboratory Decontaminant 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>HEPA Filter</td>
			<td>USA Scientific</td>
			<td>Replacement Filters</td>
			<td>High-Efficiency Particulate Air Filter for AirClean Workstations 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Kimwipes</td>
			<td>Thermo Fisher</td>
			<td>06666A</td>
			<td>Kimberly-Clark Professional Kimtech Science Kimwipes Delicate Task Wipers, 1-Ply 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Loading Trough</td>
			<td>Thermo Fisher</td>
			<td>14387069</td>
			<td>Thermo Scientific Matrix Reagent Reservoirs 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Microsoft Excel</td>
			<td>Microsoft</td>
			<td>Not Applicable</td>
			<td>Microsoft 365 package, Excel software application 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Mini Centrifuge</td>
			<td>Genesee Scientific</td>
			<td>31-500B</td>
			<td>Poseidon 31-500B Mini Centrifuge, Blue Lid 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>PCR Grade H2O</td>
			<td>Thermo Fisher</td>
			<td>AM9937</td>
			<td>Nuclease-Free Water (not DEPC-Treated) 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>PCR Hood</td>
			<td>USA Scientific</td>
			<td>4263-2588</td>
			<td>Nucleic Acid Workstation with HEPA Filtration, AirClean Systems Combination PCR Workstation 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>PCR Strips</td>
			<td>Thermo Fisher</td>
			<td>AB0776</td>
			<td>Low Profile Tubes and Flat Caps, Strips of 8 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>PCR Tube Rack</td>
			<td>Thermo Fisher</td>
			<td>344820</td>
			<td>Fisherbrand 96-Well PCR Tube Rack 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Pipette Tips (Multichannel)</td>
			<td>Ranin</td>
			<td>17005860</td>
			<td>Pipette Tips SR LTS 20&#181;L F 960A/5, 20&#181;L Maximum 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Pipette Tips (Single Channel)</td>
			<td>USA Scientific</td>
			<td>1181-3850</td>
			<td>10&#181;L Graduated TipOne RPT Filter Tips 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Pipette Tips (Single Channel)</td>
			<td>USA Scientific</td>
			<td>1180-1850</td>
			<td>20&#181;L Beveled TipOne RPT Filter Tips 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Pipette Tips (Single Channel)</td>
			<td>USA Scientific</td>
			<td>1111-0880</td>
			<td>200&#181;L Natural TipOne Pipette Tips in Racks 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Pipette Tips (Single Channel)</td>
			<td>USA Scientific</td>
			<td>1111-2890</td>
			<td>1000&#181;L Natural Graduated TipOne Pipette Tips in Racks 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Pipettors (Multichannel)</td>
			<td>Ranin</td>
			<td>17013802</td>
			<td>Pipet-Lite Multi Pipette L8-10XLS, 0.5 to 10&#181;L 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Pipettors (Multichannel)</td>
			<td>Ranin</td>
			<td>17013803</td>
			<td>Pipet-Lite Multi Pipette L8-20LS+, 2 to 20&#181;L 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Pipettors (Single Channel)</td>
			<td>Thermo Fisher</td>
			<td>F144802G</td>
			<td>Gilson Pipetman Classic Pipets, 1 to 10&#181;L 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Pipettors (Single Channel)</td>
			<td>Thermo Fisher</td>
			<td>F123600</td>
			<td>Gilson Pipetman Classic Pipets, 2 to 20&#181;L 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Pipettors (Single Channel)</td>
			<td>Thermo Fisher</td>
			<td>F123601</td>
			<td>Gilson Pipetman Classic Pipets, 20 to 200&#181;L 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Pipettors (Single Channel)</td>
			<td>Thermo Fisher</td>
			<td>F123602</td>
			<td>Gilson Pipetman Classic Pipets, 200 to 1000&#181;L 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Plate Sealing Film</td>
			<td>Bio-Rad</td>
			<td>MSB1001</td>
			<td>Microseal &#8220;B&#8221; PCR Plate Sealing Film, Adhesive, Optical 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Plate Spinner</td>
			<td>Thermo Fisher</td>
			<td>14-100-141</td>
			<td>Fisherbrand Mini Plate Spinner Centrifuge, 230 V 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Pre-Hood Filter</td>
			<td>USA Scientific</td>
			<td>4235-3724</td>
			<td>Prefilter for AirClean Systems Workstations 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>R Software</td>
			<td>The R Project for Statistical Computing</td>
			<td>Not Applicable</td>
			<td>R version 4.2.2 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Scale</td>
			<td>Thermo Fisher</td>
			<td>01-922-329</td>
			<td>OHAUS 30430060 PR Series Analytical Balance, 62g Capacity 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Scissors</td>
			<td>Office Depot</td>
			<td>458612</td>
			<td>Office Depot Brand Scissors, 8&#8221;, Straight, Black, Pack of 2 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Sharpies</td>
			<td>Sharpie</td>
			<td>2151734</td>
			<td>Brush Twin Permanent Markers, Black 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Single Copy Gene Forward Primer</td>
			<td>Integrated DNA Technologies</td>
			<td>Custom</td>
			<td>See separate table 
			Storage Temperature and Conditions: minus 20 &#176;C when rehydrated</td>
		</tr>
		<tr>
			<td>Single Copy Gene Reverse Primer</td>
			<td>Integrated DNA Technologies</td>
			<td>Custom</td>
			<td>See separate table 
			Storage Temperature and Conditions: minus 20 &#176;C when rehydrated</td>
		</tr>
		<tr>
			<td>Small Tube Rack</td>
			<td>Thermo Fisher</td>
			<td>21-402-17</td>
			<td>Thermo Fisher 8601 Reversible Microtube Racks with Lid 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Sodium Acetate</td>
			<td>Thermo Fisher</td>
			<td>J63560.EQE</td>
			<td>3M NaOAc pH 5.2 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Stainless Steel Spatula</td>
			<td>Thermo Fisher</td>
			<td>3990240</td>
			<td>Bel-Art SP Scienceware Stainless-Steel Sampling Spoon and Spatula 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>SYBR Green</td>
			<td>Thermo Fisher</td>
			<td>S7563</td>
			<td>SYBR Green I Nucleic Acid Gel Stain &#8211; 10,000X Concentrate in DMSO 
			Storage Temperature and Conditions: minus 20 &#176;C when rehydrated</td>
		</tr>
		<tr>
			<td>Syringe Filters</td>
			<td>Fisher Scientific</td>
			<td>09-927-55A</td>
			<td>GD/X 25 mm Sterile Syringe Filter, cellulose acetate filtration medium, 0.2 &#956;m 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Syringes</td>
			<td>Thermo Fisher</td>
			<td>148232A</td>
			<td>BD Luer-Lok Disposable Syringes without Needles, 10mL 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>TE Buffer</td>
			<td>Fisher Scientific</td>
			<td>BP2474100</td>
			<td>TE Buffer, Tris-EDTA, 1X Solution, pH 7.6, Molecular Biology, Fisher BioReagents 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Telomere Forward Primer</td>
			<td>Integrated DNA Technologies</td>
			<td>Custom</td>
			<td>See separate table 
			Storage Temperature and Conditions: minus 20 &#176;C when rehydrated</td>
		</tr>
		<tr>
			<td>Telomere Reverse Primer</td>
			<td>Integrated DNA Technologies</td>
			<td>Custom</td>
			<td>See separate table 
			Storage Temperature and Conditions: minus 20 &#176;C when rehydrated</td>
		</tr>
		<tr>
			<td>UV Light</td>
			<td>USA Scientific</td>
			<td>4288-2540</td>
			<td>UV Light Bulb for Workstations 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Vortex</td>
			<td>Thermo Fisher</td>
			<td>14-955-151</td>
			<td>Fisherbrand Mini Vortex Mixer, 115 V, 50/60 Hz 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
		<tr>
			<td>Weigh Boat</td>
			<td>Thermo Fisher</td>
			<td>01-549-752</td>
			<td>Fisherbrand Sterile Hexagonal Weighing Boat, 10mL 
			Storage Temperature and Conditions: Room temperature</td>
		</tr>
	</tbody>
</table>

monochrome multiplex quantitative pcr telomere length measurement 

Telomeres are protective complexes found at the end of all eukaryotic chromosomes, composed of highly conserved, repetitive DNA sequences and associated proteins. The telomere protects the integrity of DNA, preserving chromosome stability. Progressive shortening of telomeres occurs in dividing cells as a result of incomplete lagging-strand DNA synthesis, DNA damage, and other factors1,2. Increased evidence supporting telomere length (TL) as a biomarker of aging and age-related diseases across the human lifespan has been accompanied by an increase in the types of TL measurement assays utilized to evaluate the role of TL in studies of human exposure, disease, and health3,4,5. Meta-analyses have reported associations of TL with overall mortality, environmental exposures, and health outcomes, including cancer, cardiovascular disease, and diabetes6,7,8,9,10,11,12,13. These meta-associations derive from studies utilizing one of over two dozen different TL measurement methodologies where the strengths of associations tend to vary between different methodologies14,15,16. Selecting the optimal TL measurement method for a research study is a crucial step to ensuring accurate results, as each method possesses its own advantages and disadvantages5,17.
Due to the relatively low cost of reagents, rapid assay turnaround, scalability, and lower initial DNA requirement, PCR-based TL measurement techniques are often preferentially utilized when conducting studies with large sample populations, studies with limited access to samples with high DNA concentrations, or studies prioritizing high throughput. The first PCR-based method of TL measurement, the singleplex quantitative polymerase chain reaction (qPCR) originally developed by Richard Cawthon, utilizes the ratio of the fluorescence signals of telomere (T) and single copy gene (S) amplification, run on separate PCR plates18. In this approach, primers complementary to the repeated telomere DNA sequences (T) are used to amplify total telomeric DNA content in the sample and quantified by detection of the fluorescent reporter SYBR green. Similarly, primers complementary to an intergenic region of a conserved single copy (S) gene are used to quantify genome copy number. These two estimates are quantified&#160;relative to a genomic DNA standard curve utilized across all assays in a project to control plate-to-plate variation. Dividing total telomeric DNA (T) by single genome copy number (S) produces the T/S ratio, a unitless, relative measurement representing average telomeric content per cell for an individual DNA sample18,19. Thus, the T/S ratio is not a specific measurement of functional length; however, consistent with literature norms, we utilize the term average TL per sample throughout this protocol.
This method was advanced in 2009 when Richard Cawthon described the monochrome multiplex qPCR (MMqPCR) assay as an approach to potentially reduce the variability in the T/S ratio relative to the original singleplex qPCR method19. The MMqPCR assay possesses the benefits of the qPCR assay with the additional advantage of measuring T and S signals within the same reaction well using one reporting fluorophore, thereby decreasing error relative to singleplex qPCR and resulting in higher precision and reproducibility19. Furthermore, this multiplex method potentially lowers costs and enhances throughput since half as many reactions are required compared to the singleplex assay19.
Given the advantages of MMqPCR TL measurement, this method is well-suited for population-based studies of TL associations with exposures, health outcomes, and biological processes. However, initiating the method can be challenging. To address these challenges, we describe, in detail, the MMqPCR TL measurement protocol utilized in our laboratory, highlighting key steps implemented to increase assay precision, decrease risk of contamination, and enhance repeatability.
Furthermore, this protocol outlines steps for cleaning data and calculating the intraclass correlation coefficient (ICC), an important statistical measure of the reproducibility of TL&#160;measurements2. With our representative results, we demonstrate the capability of generating high ICCs using this protocol. Additionally, we identify quality control (QC) and troubleshooting steps expected to decrease the variation in the TL measurements and increase the resulting ICC. Due to this method&#39;s high repeatability, efficiency, and cost-effectiveness, the MMqPCR TL measurement is ideal for epidemiological TL research. Figure 1&#160;provides a visual overview of the MMqPCR method as described in this protocol.
<img alt="Figure 1" class="xfigimg" src="/files/ftp_upload/66545/66545fig01v2.jpg" /> 
Figure 1: Method overview. A broad overview of the monochrome multiplex quantitative polymerase chain reaction method for measuring telomere length. <a href="https://www.jove.com/files/ftp_upload/66545/66545fig01largev2.jpg" target="_blank">Please click here to view a larger version of this figure.</a>

<meta charset="utf8"></head><body>Auteur in de schijnwerpers: onderzoek naar de impact van trauma op cellulaire veroudering

Monochrome Multiplex kwantitatieve PCR-telomeerlengtemeting 

Telomeres are repetitive nucleoprotein regions at chromosome ends that shorten each time cells divide, resulting in decreases in average telomere length across the lifespan. Our lab investigates the long-term and intergenerational impacts of trauma and adversity on cellular aging by measuring telomere length and population-based studies. Interest in telomere biology is expanding beyond measuring average telomere length.New methods are being developed to assess chromosome specific telomere length and investigate links between health outcomes and other aspects of telomere biology, like telomere associated proteins and DNA damage. The interdisciplinary Telomere Research Network led by laboratory PI, Dr.Stacy Drury, works to enhance telomere measurement rigor and reproducibility by supporting international collaborative studies documenting the impact of pre-analytic factors on telomere assay precision, as well as establishing guidelines for the reporting of telomere length measurements generated using QPCR. The enhanced precision of MMQPCR allows for more granular analyses of the impacts of early adversity and life course environmental exposure on cellular aging, for example, by identifying periods of sensitivity where in exposures that occur during this time window produced more profound impacts on later life health outcomes.

Read this Scientific Article Protocol about Author Spotlight: Exploring the Impact of Trauma on Cellular Aging at JoVE.com

Telomeres are ribonucleoprotein structures at the end of all eukaryotic chromosomes that protect DNA from damage and preserve chromosome stability. ...

monochrome-multiplex-quantitative-pcr-telomere-length-measurement

Research

JoVE Journal

Genetics

Monochrome Multiplex Quantitative PCR Telomere Length Measurement 

650 Views.  Tulane University. Telomeres are repetitive nucleoprotein regions at chromosome ends that shorten each time cells divide, resulting in decreases in average telomere length across the lifespan. Our lab investigates the long-term and intergenerational impacts of trauma and adversity on cellular aging by measuring telomere length and population-based studies. Interest in telomere biology is expanding beyond measuring average telomere length.New methods are being developed to assess chromosome specific telom...