{"id":49207,"date":"2023-04-21T08:51:29","date_gmt":"2023-04-21T12:51:29","guid":{"rendered":"https:\/\/textiles.ncsu.edu\/?p=49207"},"modified":"2024-12-20T14:41:00","modified_gmt":"2024-12-20T19:41:00","slug":"new-fluorescent-dyes-help-illuminate-microscopic-life","status":"publish","type":"post","link":"https:\/\/textiles.ncsu.edu\/news\/2023\/04\/new-fluorescent-dyes-help-illuminate-microscopic-life\/","title":{"rendered":"New Fluorescent Dyes Help Illuminate Microscopic Life"},"content":{"rendered":"\n<p>Inspired by the mechanism behind light-sensitive sunglasses, a team led by a North Carolina State University researcher invented a family of fluorescent dyes to illuminate biological processes at a very small scale \u2013 comparable in size to human hair.<\/p>\n\n\n<p>The researchers described the mechanism behind the dyes in <a href=\"https:\/\/pubs.acs.org\/doi\/full\/10.1021\/acsaom.3c00025\">a publication in <em>ACS Applied Optical Materials<\/em><\/a>, led by <a href=\"https:\/\/textiles.ncsu.edu\/people\/yzhan296\/\">Yang Zhang<\/a>, assistant professor of textile engineering, chemistry and science at NC&#160;State.<\/p>\n\n\n<p>The Abstract spoke to Zhang about how the dyes work.<\/p>\n\n\n<p><strong>The Abstract<\/strong>: How do these dyes work?<\/p>\n\n\n<p><strong>Yang Zhang<\/strong>: <a href=\"https:\/\/pubs.acs.org\/doi\/full\/10.1021\/ja5125308\">We designed a family of dyes called \u201cphotoactivatable fluorophores.\u201d <\/a>These fluorescent dye molecules change color when they\u2019re hit by blue light irradiation. The dyes change color because part of the dye structure is photosensitive, and light irradiation changes their molecular structure. The dye conformations will emit light on a greener spectrum initially, and will emit red light after irradiation.<\/p>\n\n\n<p><strong>TA<\/strong>: How do the dyes fluoresce?<\/p>\n\n\n<p><strong>Zhang:<\/strong> It\u2019s like when human beings eat food, we absorb energy so we can do work, and then we go to bed to relax. After the molecule absorbs the energy, it wants to relax back to its ground state, so it relaxes and throws out the photons. The microscopic biological world is dark, and these dyes help to illuminate the biological processes with a microscope.<\/p>\n\n\n<p><strong>TA<\/strong>: How do you use them to illuminate microscopic processes?<\/p>\n\n\n<p><strong>Zhang<\/strong>: We designed these dyes to be used with microscopy in basic biomedical research, although they have not been used in humans. We used the dyes to illuminate tiny transport molecules, or nanocarriers, diffusing within developing nematodes, or in developing flies. Those are typically hard to image using any other approaches.<\/p>\n\n\n<p>Currently, we are exploring our dyes for single-molecule imaging, building upon work <a href=\"https:\/\/www.nobelprize.org\/prizes\/chemistry\/2014\/press-release\/\">that won three scientists the Nobel Prize in Chemistry in 2014<\/a>. This technique helps biomedical researchers investigate complicated life processes down to the nanoscale \u2013 in other words, at the molecular level.<\/p>\n\n\n<p><strong>TA<\/strong>: Do dyes like this exist already, and if so, how are the ones you worked on different?<\/p>\n\n\n<p><strong>Zhang<\/strong>: The dyes we worked on are brighter, and we think they are safer. That\u2019s because they emit light in the near-infrared region. You want to avoid having irradiation absorbed into tissue or cells. Also, we excite the cells by hitting them with light at a longer wavelength, so at a lower energy level. That will avoid heating up the cells, and potentially killing them. Our next steps are to look more closely at the phototoxicity levels to see how these dyes can be used more widely for single-molecule imaging.<\/p>\n\n\n<p><em>The paper, \u201cPhotoactivatable Fluorophores for Bioimaging Applications,\u201d was published online Feb. 27, 2023, in ACS Applied Optical Materials.\u201d Co-authors included Yeting Zheng, Andrea Tomassini, Ambarish Kumar Singh and Francisco M. Raymo. The work was supported by the National Institutes of Health (NIGMS-R01GM143397 and R21GM141675) and National Science Foundation (CHE-1954430).<\/em><\/p>\n<p><em>This post was <a href=\"https:\/\/news.ncsu.edu\/2023\/04\/new-fluorescent-dyes-help-illuminate-microscopic-life\/\">originally published<\/a> in NC&#160;State News.<\/em><\/p>","protected":false,"raw":"<!-- wp:paragraph -->\n<p>Inspired by the mechanism behind light-sensitive sunglasses, a team led by a North Carolina State University researcher invented a family of fluorescent dyes to illuminate biological processes at a very small scale \u2013 comparable in size to human hair.<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p>The researchers described the mechanism behind the dyes in <a href=\"https:\/\/pubs.acs.org\/doi\/full\/10.1021\/acsaom.3c00025\">a publication in <em>ACS Applied Optical Materials<\/em><\/a>, led by <a href=\"https:\/\/textiles.ncsu.edu\/people\/yzhan296\/\">Yang Zhang<\/a>, assistant professor of textile engineering, chemistry and science at NC State.<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p>The Abstract spoke to Zhang about how the dyes work.<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p><strong>The Abstract<\/strong>: How do these dyes work?<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p><strong>Yang Zhang<\/strong>: <a href=\"https:\/\/pubs.acs.org\/doi\/full\/10.1021\/ja5125308\">We designed a family of dyes called \u201cphotoactivatable fluorophores.\u201d <\/a>These fluorescent dye molecules change color when they\u2019re hit by blue light irradiation. The dyes change color because part of the dye structure is photosensitive, and light irradiation changes their molecular structure. The dye conformations will emit light on a greener spectrum initially, and will emit red light after irradiation.<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p><strong>TA<\/strong>: How do the dyes fluoresce?<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p><strong>Zhang:<\/strong> It\u2019s like when human beings eat food, we absorb energy so we can do work, and then we go to bed to relax. After the molecule absorbs the energy, it wants to relax back to its ground state, so it relaxes and throws out the photons. The microscopic biological world is dark, and these dyes help to illuminate the biological processes with a microscope.<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p><strong>TA<\/strong>: How do you use them to illuminate microscopic processes?<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p><strong>Zhang<\/strong>: We designed these dyes to be used with microscopy in basic biomedical research, although they have not been used in humans. We used the dyes to illuminate tiny transport molecules, or nanocarriers, diffusing within developing nematodes, or in developing flies. Those are typically hard to image using any other approaches.<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p>Currently, we are exploring our dyes for single-molecule imaging, building upon work <a href=\"https:\/\/www.nobelprize.org\/prizes\/chemistry\/2014\/press-release\/\">that won three scientists the Nobel Prize in Chemistry in 2014<\/a>. This technique helps biomedical researchers investigate complicated life processes down to the nanoscale \u2013 in other words, at the molecular level.<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p><strong>TA<\/strong>: Do dyes like this exist already, and if so, how are the ones you worked on different?<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p><strong>Zhang<\/strong>: The dyes we worked on are brighter, and we think they are safer. That\u2019s because they emit light in the near-infrared region. You want to avoid having irradiation absorbed into tissue or cells. Also, we excite the cells by hitting them with light at a longer wavelength, so at a lower energy level. That will avoid heating up the cells, and potentially killing them. Our next steps are to look more closely at the phototoxicity levels to see how these dyes can be used more widely for single-molecule imaging.<\/p>\n<!-- \/wp:paragraph -->\n<!-- wp:paragraph -->\n<p><em>The paper, \u201cPhotoactivatable Fluorophores for Bioimaging Applications,\u201d was published online Feb. 27, 2023, in ACS Applied Optical Materials.\u201d Co-authors included Yeting Zheng, Andrea Tomassini, Ambarish Kumar Singh and Francisco M. Raymo. The work was supported by the National Institutes of Health (NIGMS-R01GM143397 and R21GM141675) and National Science Foundation (CHE-1954430).<\/em><\/p>\n<!-- \/wp:paragraph -->"},"excerpt":{"rendered":"<p>An NC State researcher is using fluorescent dyes to illuminate biological processes at a small scale.<\/p>\n","protected":false},"author":8,"featured_media":49212,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"source":"ncstate_wire","ncst_custom_author":"","ncst_show_custom_author":false,"ncst_dynamicHeaderBlockName":"ncst\/default-post-header","ncst_dynamicHeaderData":"{\"showAuthor\":true,\"showDate\":true,\"showFeaturedVideo\":false,\"caption\":\"\",\"displayCategoryID\":512}","ncst_content_audit_freq":"","ncst_content_audit_date":"","footnotes":"","_links_to":"","_links_to_target":""},"categories":[512,479],"tags":[1143,1668,2327,504,1382],"class_list":["post-49207","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-research-and-innovation","category-tecs","tag-department-of-textile-engineering-chemistry-and-science","tag-faculty","tag-faculty-research","tag-research","tag-wilson-college-of-textiles"],"displayCategory":{"term_id":512,"name":"Research and Innovation","slug":"research-and-innovation","term_group":0,"term_taxonomy_id":512,"taxonomy":"category","description":"","parent":0,"count":243,"filter":"raw"},"acf":[],"yoast_head":"<title>New Fluorescent Dyes Help Illuminate Microscopic Life - 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