Cell Counting Methods

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Overview

A key step in many experimental workflows involves the counting of cells. Researchers often need to count cells prior to cell culture or before studying downstream processes and using analytical techniques that require an accurate and consistent number of input cells. Knowing the number of input cells is important for standardizing experiments and for measuring assay impact. Processes that require accurate and consistent numbers of input cells include transfection, cell proliferation or viability studies, and quantitative PCR. For researchers performing cell culturing, measuring the number of cells grown in tissue culture is essential to determine the level of confluence before diluting the cells into smaller aliquots for optimal cell growth.

 

This section provides an overview of the different cell counting methods and automated cell counters available, and mentions their advantages and disadvantages.

 

Related Topics: Transfection, Real-Time PCR and Multiplex Immunoassays.

 

Why Count Cells?

  • For maintaining cell cultures
    • Splitting cells or preparing for the next passage (usually cells are diluted into a new culture flask with fresh media for optimal growth)
  • For preparing cells for transfection experiments
  • For preparing cells for downstream experiments that require accurate and consistent numbers of input cells, including qPCR
 

Cell Counting Methods

Cell counting can be performed either by manually using a hemocytometer, or by using an automated cell counter. Read more on cell viability and cytotoxicity assays in the Protocols section below.

 

Hemocytometer

For over 100 years the hemocytometer has been used by cell biologists to count cells. It was first developed for the quantitation of blood cells but became a popular and effective tool for counting a variety of other cell types, particles, and even small organisms. Currently, hemocytometers equipped with improved Neubauer grids are a mainstay of cell biology labs. Cell counting using a hemocytometer suffers from a variety of shortcomings. These shortcomings include, but are not limited to, a lack of statistical robustness at low sample concentration, poor counts due to device misuse, and subjectivity of counts among users. In addition, cell counting using a hemocytometer is a time consuming and tedious operation.

You can find a manual cell counting protocol in the Protocols section below.

 

Automated Cell Counters

In recent years automated cell counting has become an attractive alternative to manual hemocytometer-based cell counting, offering more reliable results in a fraction of the time needed for manual counting.

Automated cell counters, such as the TC20™ automated cell counter, can provide a total count of mammalian cells and a live/dead ratio in a single step. Because there is no bias in counting, automated cell counters yield more accurate and reproducible results. Examples of processes that benefit from the speed and accuracy of automated cell counting include flow cytometry, toxicology studies, viral production, high content screening, and high content analysis.

Comparisons of count reproducibility, accuracy, and time to get results between a hemocytometer and the TC20 automated cell counter have been described in Hsiung et al. 2013 (Bio-Rad bulletin 6003).

 

Related Content

 
TC20 System Tour
In this interactive demonstration you will be able to test drive the TC20 automated cell counter, simulate an experiment, get a 360° view of the instrument, and dig deeper into the instrument's specifications and features.
 
Using the TC20 Automated Cell Counter
The TC20 cell counter provides a total count of mammalian cells and a live/dead ratio in one simple step, giving accurate, reproducible results in less than 30 seconds.
 
Literature
Number Description Download
6003 Comparison of Count Reproducibility, Accuracy, and Time to Results between a Hemocytometer and the TC20 Automated Cell Counter, Rev B Click to download
6011 Multifocal Plane Analysis Is Essential for Accurate Cell Viability Assessment Using an Automated Cell Counter, Rev B Click to download
6087 Comparison between the TC10 Automated Cell Counter and the Lactate Dehydrogenase (LDH) Assay to Assess Cellular Toxicity in Vitro, Rev A Click to download
6152 Accurate Counting of Bio-Plex Magnetic or Polystyrene Beads Using the TC10 Automated Cell Counter, Rev A Click to download
Number Description Options
6234 Cell Viability and Cytotoxicity Click to download
6235 Counting Cells with a Hemocytometer and a Microscope Click to download
 
 
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Researchers often need to count cells prior to cell culture or before studying downstream processes and using analytical techniques that require an accurate and consistent number of input cells. Knowing the number of input cells is important for standardizing experiments and for measuring assay impact. Processes that require accurate and consistent numbers of input cells include transfection, cell proliferation or viability studies, and quantitative PCR. For researchers performing cell culturing, measuring the number of cells grown in tissue culture is essential to determine the level of confluence before diluting the cells into smaller aliquots for optimal cell growth.</p> <p>&nbsp;</p> <p>This section provides an overview of the different cell counting methods and automated cell counters available, and mentions their advantages and disadvantages.</p> <p>&nbsp;</p> <p><strong>Related Topics:</strong> <a href="/evportal/destination/solutions?catID=LUSONCB9O">Transfection</a>, <a href="/evportal/destination/solutions?catID=LUSO4W8UU">Real-Time PCR</a> and <a href="/evportal/destination/solutions?catID=LUSM0E8UU">Multiplex Immunoassays</a>.</p> Why Count Cells? <ul> <li>For maintaining cell cultures <ul> <li>Splitting cells or preparing for the next passage (usually cells are diluted into a new culture flask with fresh media for optimal growth)</li> </ul> </li> <li>For preparing cells for transfection experiments</li> <li>For preparing cells for downstream experiments that require accurate and consistent numbers of input cells, including <a href="/evportal/destination/solutions?catID=LUSO4W8UU">qPCR</a> </li> </ul> <div class="top"><a href="#helptop">Back to Top</a></div> Cell Counting Methods <p>Cell counting can be performed either by manually using a hemocytometer, or by using an automated cell counter. <a href="#related_content">Read more on cell viability and cytotoxicity assays</a> in the Protocols section below.</p> <div class="top"><a href="#helptop">Back to Top</a></div> Hemocytometer <p>For over 100 years the hemocytometer has been used by cell biologists to count cells. It was first developed for the quantitation of blood cells but became a popular and effective tool for counting a variety of other cell types, particles, and even small organisms. Currently, hemocytometers equipped with improved Neubauer grids are a mainstay of cell biology labs. Cell counting using a hemocytometer suffers from a variety of shortcomings. These shortcomings include, but are not limited to, a lack of statistical robustness at low sample concentration, poor counts due to device misuse, and subjectivity of counts among users. In addition, cell counting using a hemocytometer is a time consuming and tedious operation.</p> <p><a href="#related_content">You can find a manual cell counting protocol</a> in the Protocols section below.</p> <div class="top"><a href="#helptop">Back to Top</a></div> Automated Cell Counters <p>In recent years <a href="/evportal/destination/solutions?catID=LUSOMAOZR">automated cell counting</a> has become an attractive alternative to manual hemocytometer-based cell counting, offering more reliable results in a fraction of the time needed for manual counting.</p> <p>Automated cell counters, such as the <a href="/evportal/destination/commerce/product_detail?catID=M7FBG34VY">TC20&trade; automated cell counter</a>, can provide a total count of mammalian cells and a live/dead ratio in a single step. Because there is no bias in counting, automated cell counters yield more accurate and reproducible results. Examples of processes that benefit from the speed and accuracy of automated cell counting include flow cytometry, toxicology studies, viral production, high content screening, and high content analysis.</p> <p>Comparisons of count reproducibility, accuracy, and time to get results between a hemocytometer and the TC20 automated cell counter have been described in Hsiung et al. 2013 (<a href="http://www.bio-rad.com/webroot/web/pdf/lsr/literature/Bulletin_6003.pdf" target="blank">Bio-Rad bulletin 6003</a>).</p> <div class="top"><a href="#helptop">Back to Top</a></div> Protocols <table id="carttablealigned" class="literature_table" style="height: auto; width: 583px;" border="0" cellspacing="0" cellpadding="0"> <tbody> <tr> <th>Number</th> <th>Description</th> <th class="options">Options</th> </tr> <tr> <td width="100">6234</td> <td width="350">Cell Viability and Cytotoxicity</td> <td class="pdf"><a class="pdf" href="/webroot/web/pdf/lsr/literature/Bulletin_6234.pdf" target="_blank"><span>Click to download</span></a></td> </tr> <tr> <td width="100">6235</td> <td width="350">Counting Cells with a Hemocytometer and a Microscope</td> <td class="pdf"><a class="pdf" href="/webroot/web/pdf/lsr/literature/Bulletin_6235.pdf" target="_blank"><span>Click to download</span></a></td> </tr> </tbody> </table> Educational tools <p>&nbsp;</p> <div class="custom_content"> <ul> <li><a title="TC20 interactive demo" onclick="window.open('http://biorad-ads.com/green/system-tour/TC20/', 'StatusBar', 'toolbar=no, resizable=no, scrollbars=no, width=1024,height=770,left=50%,top=50%');" href="#">TC20 interactive demo</a></li> <li><a href="http://www.biorad-ads.com/09-0804_educational_tools/cell_bio_101_v04.html" target="_blank">Cell biology 101</a></li> <li><a href="http://www.biorad-ads.com/09-0804_educational_tools/09-0248_Bio-Rad_Basic_Cell_Culture.pdf" target="_blank">Basic cell culture introduction</a></li> </ul> </div> <div class="videowrap"> <div class="videoImg"><a title="TC20 Automated Cell Counter System Tour" onclick="window.open('http://biorad-ads.com/green/system-tour/TC20/', 'StatusBar', 'toolbar=no, resizable=no, scrollbars=no, width=1024,height=770,left=50%,top=50%');" href="#"><img style="width: 88px; height: 51px; border: 0px none;" src="/webroot/web/images/lsr/products/cell_counting/product_overlay_icons/global/tc-20-system-tour-thumb.jpg" alt="" /></a></div> <div class="videoDesc"><a title="Using the TC20 Automated Cell Counter" onclick="window.open('http://biorad-ads.com/green/system-tour/TC20/', 'StatusBar', 'toolbar=no, resizable=no, scrollbars=no, width=1024,height=770,left=50%,top=50%');" href="#">TC20 System Tour</a><br /> In this interactive demonstration you will be able to test drive the TC20 automated cell counter, simulate an experiment, get a 360&deg; view of the instrument, and dig deeper into the instrument's specifications and features.</div> <div class="clear">&nbsp;</div> </div> <div class="videowrap"> <div class="videoImg"><a title="Using the TC20 Automated CEll Counter" onclick="javascript:openElementOverlay('usingTC20');" href="javascript:void(0);"><img style="width: 88px; height: 51px; border: 0px none;" src="/webroot/web/images/lsr/products/cell_counting/category_overlay_icons/global/tc20-video-overlay_tn.jpg" alt="" /></a></div> <div class="videoDesc"><a title="Using the TC20 Automated CEll Counter" onclick="javascript:openElementOverlay('usingTC20');" href="javascript:void(0);">Using the TC20 Automated Cell Counter</a><br />The TC20 cell counter provides a total count of mammalian cells and a live/dead ratio in one simple step, giving accurate, reproducible results in less than 30 seconds.</div> <div class="clear">&nbsp;</div> </div> <div id="usingTC20" style="display: none;"> <div class="overlay_contents"> <div class="overlay-head">Using the TC20&trade; Automated Cell Counter</div> <div style="text-align:center;"><iframe src="http://youtube.com/embed/sDHOL7UEL1M?version=3&amp;rel=0&amp;showinfo=0&amp;theme=light&amp;modestbranding=1&amp;fs=1;wmode=transparent" width="620" height="376"></iframe></div> </div> </div> <div class="videowrap vwrap_last"> <div class="videoImg"><a href="http://www.jove.com/video/1904/using-an-automated-cell-counter-to-simplify-gene-expression-studies-sirna-knockdown-of-il-4-dependent-gene-expression-in-namalwa-cells" target="_blank"><img style="border:none" src="/webroot/web/images/lsr/support/tutorials/global/ov_cell_counting_transfection.jpg" alt="" /></a></div> <div class="videoDesc"><a href="http://www.jove.com/video/1904/using-an-automated-cell-counter-to-simplify-gene-expression-studies-sirna-knockdown-of-il-4-dependent-gene-expression-in-namalwa-cells" target="_blank">Using an Automated Cell Counter to Simplify Gene Expression Studies: siRNA Knockdown of IL-4 Dependent Gene Expression in Namalwa Cells</a><br /> &nbsp;</div> <div class="clear">&nbsp;</div> </div> 6003 6011 6087 6152 /templatedata/internet/documentation/data/LSR/Literature/6152.xml Life Science Research/Products/Sample Quantitation/TC10 Automated Cell Counter ->MTS::KW3FRJ15##Life Science Research/Products/Transfection/Electroporation/Gene Pulser MXcell Electroporation System ->MT::fae0f825-da45-4b02-aa33-73781dda6171##Life Science Research/Products/Transfection/Electroporation/Gene Pulser Xcell Electroporation Systems ->MT::b1a35eb3-d55c-47b3-aaf3-95e4d1d85848##Life Science Research/Products/Amplification - PCR/PCR Reagents/Reverse Transcription Reagents/iScript RT -qPCR Sample Preparation Reagent ->MT::1304eaa4-209d-4a27-88d3-0aa20389dad8##Life Science Research/Products/Amplification - PCR/Real-Time PCR Detection Systems/CFX96 Touch Real-Time PCR Detection System ->MTS::LJB1YU15## Life Science Research/Solutions/Technologies/Transfection ->MTS::LUSONCB9O##Life Science Research/Solutions/Technologies/qPCR|Real-Time PCR ->MTS::LUSO4W8UU##Life Science Research/Solutions/Technologies/Multiplex Immunoassays ->MTS::LUSM0E8UU## Shanker Cell Counting Methods <p>Manual and automated cell counting methods and their application to gene expression studies are presented and discussed here.</p> 11/18/11 03:34 PM 11/18/22 03:38 PM AE,AI,AL,AM,AR,AT,AU,AZ,BA,BD,BE,BF,BG,BH,BN,BO,BR,BW,CA,CH,CL,CM,CN,CO,CR,CY,CZ,DE,DK,DO,DZ,EC,EE,EG,EH,ER,ES,ET,FI,FM,FO,FR,GA,GE,GF,GH,GP,GR,GT,GU,HK,HN,HR,HT,HU,ID,IE,IL,IN,IS,IT,JM,JO,JP,KE,KH,KR,KW,KZ,LB,LI,LK,LT,LU,LV,MA,MD,MG,MK,ML,MO,MQ,MS,MT,MU,MX,MY,NG,NI,NL,NO,NP,NZ,OM,PA,PE,PF,PG,PH,PK,PL,PR,PS,PT,PW,PY,QA,RO,RS,RU,SA,SB,SE,SG,SI,SK,SN,ST,SV,TG,TH,TN,TO,TR,TT,TW,TZ,UA,UG,UK,US,UY,UZ,VA,VE,VU,XK,YE,ZA en LSR /LSR/Technologies/Cell_Counting_Methods N 0
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