{"id":1957,"date":"2016-09-26T12:00:42","date_gmt":"2016-09-26T19:00:42","guid":{"rendered":"https:\/\/keck.usc.edu\/news\/megan-mccain-receives-american-heart-association-faculty-award\/"},"modified":"2023-11-26T08:21:52","modified_gmt":"2023-11-26T16:21:52","slug":"megan-mccain-receives-american-heart-association-faculty-award","status":"publish","type":"post","link":"https:\/\/keck.usc.edu\/news\/megan-mccain-receives-american-heart-association-faculty-award\/","title":{"rendered":"Megan McCain receives American Heart Association Faculty Award"},"content":{"rendered":"\n \n \n\n\n\n\n\n\n\n
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Megan McCain receives American Heart Association Faculty Award<\/h1>\n\n\n<\/div>\n \n \n
\n \n September 26, 2016<\/span>\n <\/div>\n \n \n
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Megan McCain (Photo courtesy of the USC Viterbi School of Engineering)<\/figcaption>\n <\/figure>\n \n \n \n\n<\/div>\n \n\n <\/div><\/div>\n\r\n\r\n\n\n \n \n\n\n\n\n\n\n\n
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\nMegan McCain has received a 2016 Scientist Development Grant from the American Heart Association. The three-year, $231,000 grant supports highly promising early career scientists in cardiovascular and stroke research. McCain\u2014Gabilan Assistant Professor of Biomedical Engineering, and Stem Cell Biology and Regenerative Medicine\u2014and her research team will focus specifically on developing human-based platforms to test drugs for heart failure caused by muscular dystrophy.\n<\/div>\n
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In the past, pharmaceutical companies and academic labs have used mice with genetic mutations to better understand the incurable disease. In USC Viterbi\u2019s Laboratory for Living Systems Engineering, McCain, who was first attracted to studying the heart after seeing heart cells rhythmically contract on their own when grown in a dish, will use a more \u201chuman-relevant\u201d engineering approach.
\n\u201cMany times, aspects of diseases that are identified in mice don\u2019t translate to humans, so mice are not ideal model systems,\u201d McCain said. \u201cAnimal models are also quite expensive\u2014they take a lot of time at a lot of cost.\u201d
\nIn lieu of mice, McCain\u2019s team will utilize induced pluripotent stem cells derived from patients with muscular dystrophy. This new technology entails reprogramming human skin cells into stem cells that can then be turned into human heart cells. The heart cells will then be grown on scaffolds made from custom biomaterials that better mimic the human body.
\n\u201cWe take heart cells and grow them in an incubator, which people have been doing for a long time,\u201d McCain said. \u201cHowever, most times researchers grow cells on a plastic dish that doesn\u2019t mimic the native human body very well. The cells lose their architecture and are grown on a substrate that doesn\u2019t match the mechanical properties of the native heart.\u201d
\nOnce the new heart cells are fixed to the custom-engineered platforms, the team will study how strongly the cells contract in response to drugs and identify how the disease progresses.
\n\u201cPharmaceutical companies often screen drugs by seeing if the cells are alive or dead because they don\u2019t have sophisticated tools for measuring contraction,\u201d McCain said. \u201cAnother goal of our work is to develop these platforms to extract functional information instead of just toxicity because a lot of things can go wrong with your heart before it fails completely.\u201d
\nThis dynamic model, nicknamed \u201cheart-on-a-chip,\u201d employs a hydrogel scaffold that is tuned to mimic the stiffness of heart tissue, both healthy tissue that is soft and squishy and stiffer tissue meant to replicate a heart affected by muscular dystrophy, which has a lot of scarring.
\nFrom there, the team will test drugs and therapies that other model systems have shown could be promising to treat muscular dystrophy.
\n\u201cThere\u2019s really a need to apply engineering approaches to drug screening because companies need to be very quantitative and test many drugs with high throughput. You don\u2019t want to have false positives or negatives,\u201d McCain states. \u201cBy elevating the way drug screening is done today, we as engineers can have a broad impact on human health.\u201d<\/p>\n

By Breanne Grady<\/h5>\n\n\n\n<\/div>\n <\/div>\n\n\n <\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":168,"featured_media":1958,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"advgb_blocks_editor_width":"","advgb_blocks_columns_visual_guide":"","footnotes":"","_links_to":"","_links_to_target":""},"categories":[6],"tags":[436],"class_list":["post-1957","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-press-release","tag-usc-stem-cell"],"acf":[],"yoast_head":"\nMegan McCain receives American Heart Association Faculty Award<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/keck.usc.edu\/news\/megan-mccain-receives-american-heart-association-faculty-award\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" 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