[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-594851-105":59,"doc-detail-594851-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","selection-of-an-optimal-cytotoxicity-assay-for-undergraduate-research","Selection of an Optimal Cytotoxicity Assay for Undergraduate Research","","Undergraduate research enables students to demonstrate the dedication and time required for biology work, but cytotoxicity studies can be constrained by limited training and funding. Counting viable cells directly is laborious and error-prone, while some colorimetric assays add multiple steps and demand accurate pipetting. This study compares MTT, resazurin, and crystal violet assays against direct viability counting using cantharidin-treated breast cancer cells (MCF-7, MDA-MB-231). Results show MTT and resazurin are highly reproducible and cost-effective, whereas crystal violet is less reproducible.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":40,"@type":76,"position":81},"https://docshare.wps.com/document/research-report/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/selection-of-an-optimal-cytotoxicity-assay-for-undergraduate-research/594851/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/selection-of-an-optimal-cytotoxicity-assay-for-undergraduate-research/594851.png","ImageObject",300,407,{"name":92,"@type":93},"Mary Man","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-15",true,{"@type":102,"interactionType":103,"userInteractionCount":24},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"Why is choosing a cytotoxicity assay important for undergraduate research?","Question",{"text":112,"@type":113},"Undergraduates may face limited time, training, and funding. Some assays are tedious or include many pipetting-dependent steps that increase user error.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"Which assays were compared in the study and against what baseline?",{"text":117,"@type":113},"The study compared three colorimetric assays—MTT, resazurin, and crystal violet—against direct counting of viable cells.",{"name":119,"@type":110,"acceptedAnswer":120},"What conclusion did the study reach about assay reproducibility?",{"text":121,"@type":113},"Crystal violet was less reproducible than direct cell counting, while MTT and resazurin were highly reproducible and relatively low cost.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},594851,1793062663,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":39,"category_name":40,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":24,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":44,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":144,"preview_page_count":4},7421720224475,"https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","Selection of an Optimal Cytotoxicity Assay for Undergraduate Research  \nJ. W. Mangis, T. B. Mansur, K. M. Kern, and J. R. Schroeder* Department of Biology, Millikin University, Decatur, USA  \n*email: [j](jrschroeder@millikin.edu)[rschroeder@millikin.edu](jrschroeder@millikin.edu)  \nAbstract  \nUndergraduate research is a valuable tool to demonstrate both the dedication and time required to be a successful biologist. One area of research that has intrigued students over the last several years is cytotoxicity. However, at smaller undergraduate institutions, the time, training, and funding available for these research studies may be limited. Direct counting of cells is tedious and leads to mistakes, and although there are now several colorimetric toxicity assays, some have several steps and require near-perfect pipetting skills. To identify the most reproducible and affordable method(s) for undergraduate students to perform cell-based toxicity studies, we compared three colorimetric assays to counting viable cells directly. Using a breast cancer model system, students applied cantharidin to two different breast cancer cell lines, MCF-7 and MDA-MB- 231, and performed MTT, resazurin, and crystal violet colorimetric assays or counted viable cells directly. We hypothesized that the MTT assay would be the most reproducible assay. Our results indicate that the crystal violet assay was not as reproducible as direct counting of cells, and therefore, not the best assay to use for toxicity tests. In contrast, the MTT and resazurin assays were highly reproducible and relatively low cost, and thus ideal assays for student research.  \nKey words: biology education; comparative study; higher education; cell viability  \nIntroduction  \nBreast cancer is the second most common cancer in the United States, with about 230,000 new cases being discovered annually ([www.cancer.org](www.cancer.org)). Several breast cancer cell lines exist for research studies, including the well-characterized MCF-7 and MDAMB-231 cells (Berthois, Katzenellenbogen, & Katzenellenbogen, 1986; Gupta & Kuperwasser, 2006; Harrell et al., 2006; St-Hilaire, Mandal, Commendador, Mannel, & Derryberry, 2011) . We have used these cells in the past for testing of the toxicity of chemotherapeutics as well as pesticides (Kern & Schroeder, 2014; Jesionowski, Gabriel, Rich,& Schroeder, 2015; Florian, Mansfield, & Schroeder, 2016; Waszczuk & Schroeder, 2017) Additionally, other research has been published utilizing these as model systems for toxicity testing (Reardon et al., 1999; Ukpebor, Llabjani, Martin, & Halsall, 2011; Voborilova et al., 2011; Gurunathan, Han, Eppakayala, Jeyaraj, & Kim, 2013; Han et al., 2013; Gong, Goy, Olivo, & Yong, 2014) .  \nAlthough a model system may be simple to select, the determination of the proper assays to monitor responsiveness can be difficult. There are several published and advertised cytotoxicity assays, examining both basic viability as well as metabolic activity. Henriksson et al. (2006) compared the amount of cell death observed using several assays, including cell counting, 3-(4,5-dimethylthiazol-2-yl) -  \n2,5-diphenyl-tretrazolium bromide (MTT), crystal violet, and AlamarBlue (Henriksson, Kjellen, Wahlberg, Wennerberg, & Kjellstrom, 2006) . MTTassays quantify the conversion of a yellow tetrazolium salt into purple formazan crystals using mitochondrial enzyme succinate dehydrogenase, which will only occur in viable cells (Riss et al., 2004; Niles, Moravec,& Riss, 2009; Sylvester, 2011) . The AlamarBlue assay uses resazurin, a dye that shows both a colorimetric and a fluorometric change depending on cell metabolism, converting a blue dye to a pink color in the presence of active cells (Henriksson et al., 2006) . Crystal violet is often used in microbial studies as a Gram stain. Due to the complexity of the staining process, it should detect only living cells. Dead cells are rinsed away through several washing steps, and the dye only stains the livi","cbCaihPnvtCmKZ1N","https://ap.wps.com/l/cbCaihPnvtCmKZ1N","pdf",490452,"English","# Abstract\n# Introduction\n## Breast cancer model systems and background\n## Overview of cytotoxicity assay principles\n## Study design and cantharidin model","[{\"question\":\"Why is choosing a cytotoxicity assay important for undergraduate research?\",\"answer\":\"Undergraduates may face limited time, training, and funding. Some assays are tedious or include many pipetting-dependent steps that increase user error.\"},{\"question\":\"Which assays were compared in the study and against what baseline?\",\"answer\":\"The study compared three colorimetric assays—MTT, resazurin, and crystal violet—against direct counting of viable cells.\"},{\"question\":\"What conclusion did the study reach about assay reproducibility?\",\"answer\":\"Crystal violet was less reproducible than direct cell counting, while MTT and resazurin were highly reproducible and relatively low cost.\"}]","Selection of an Optimal Cytotoxicity Assay for Undergraduate Research | PDF",1792079961,23]