{"id":306360,"date":"2025-11-22T03:14:25","date_gmt":"2025-11-22T03:14:25","guid":{"rendered":"https:\/\/www.newsbeep.com\/us\/306360\/"},"modified":"2025-11-22T03:14:25","modified_gmt":"2025-11-22T03:14:25","slug":"in-animal-tests-this-needle-free-insulin-acted-as-fast-as-injections","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/us\/306360\/","title":{"rendered":"In animal tests, this needle-free insulin acted as fast as injections"},"content":{"rendered":"<p>A material that slips through skin might someday make needle-free insulin possible for people with diabetes.<\/p>\n<p>In mice and mini pigs, attaching the permeating polymer to insulin and applying the resulting compound like a cream normalized blood glucose levels almost <a href=\"https:\/\/doi.org\/10.1038\/s41586-025-09729-x\" target=\"_blank\" rel=\"noopener nofollow\">as quickly as injecting insulin<\/a>, researchers report November 19 in Nature. This approach, called transdermal delivery, could allow people to manage diabetes using patches rather than injections.<\/p>\n<p>For many essential medications, \u201ctransdermal drug delivery has been a longtime dream,\u201d with millions of dollars invested for insulin alone, says bioengineer Youqing Shen of Zhejiang University in Hangzhou, China. Regular insulin injections come with problems such as needle phobia, pain, skin complications and poor compliance. Insulin can\u2019t be taken in pill form because the digestive system breaks it down.<\/p>\n<p>  Sign up for our newsletter<\/p>\n<p style=\"padding-left: 20px; margin: 0px; max-width: 900px; margin: auto\">We summarize the week&#8217;s scientific breakthroughs every Thursday.<\/p>\n<p>                        input[type=&#8221;radio&#8221;].svelte-wecxzz{display:none}.payment-option-wrapper.svelte-wecxzz.svelte-wecxzz{display:flex;flex:1 0 28%;width:100%}.payment-option-wrapper.svelte-wecxzz.svelte-wecxzz:only-child{max-width:325px}.box-container.svelte-wecxzz.svelte-wecxzz{display:flex;flex-direction:column;flex:1 1 0;width:0;text-align:center}.inner-box.svelte-wecxzz.svelte-wecxzz{border:var(&#8211;zf-payment-options-border);border-radius:var(&#8211;zf-payment-options-borderRadius);background-color:var(&#8211;zf-payment-options-bgColor);height:100%;display:flex;flex-direction:column}.box-container.highlighted.svelte-wecxzz 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}}.zephr-form-disabled-div{pointer-events:none;opacity:0.8}.zephr-form-relative-container{position:relative}.zephr-form-flex-container{display:flex}.zephr-form-input-inner-button{cursor:pointer;position:absolute;top:50%;transform:translateY(-50%);right:5px;padding:10px 5px}.zephr-form-input-inner-text{color:var(&#8211;zephr-color-text-main);font-size:var(&#8211;zf-subtext-fontSize);font-weight:bold;font-family:var(&#8211;zf-root-fontFamily)}<br \/>\n]]><\/p>\n<p>Transdermal delivery is already used for some small <a href=\"https:\/\/www.snexplores.org\/article\/nicotine-smoke-enters-body-through-skin\" target=\"_blank\" rel=\"noopener nofollow\">molecules like nicotine<\/a>, but insulin, a large protein hormone, can\u2019t get through the skin\u2019s complex structure. Researchers can boost skin permeability with techniques <a href=\"https:\/\/www.sciencenews.org\/article\/painless-nanoneedle-patch-biopsies\" rel=\"nofollow noopener\" target=\"_blank\">including microneedles<\/a>, ultrasound or chemicals that liquidize parts of the skin\u2019s outer barrier layer. These compromise the skin\u2019s integrity though, raising concerns about infection and safety.<\/p>\n<p>Shen and colleagues instead used a polymer designed to travel through skin by interacting with its different layers. The polymer changes state depending on pH, exploiting the fact that the pH of skin increases with depth.<\/p>\n<p>The polymer starts off positively charged and so binds to negatively charged fatty acid molecules in skin\u2019s topmost barrier layer. This surface layer is acidic, with a pH of 4 to 5, but deeper layers are neutral, with a pH around 7. The increase in pH triggers a reaction in which the polymer becomes electrically neutral. In this state, it detaches from the fatty molecules, enabling it to diffuse through deeper layers.<\/p>\n<p>Shen and colleagues chemically joined insulin to this polymer. Using a fluorescent dye and an array of imaging techniques, they confirmed that the combined molecule permeates through skin into the bloodstream, where it accumulates in tissues involved in regulating glucose, including the liver. \u201cThe polymer works as a locomotive, with insulin as cargo,\u201d Shen says.<\/p>\n<p>In diabetic mice and mini pigs, whose skin is similar to humans, applying the permeable insulin lowered blood glucose to normal levels within one to two hours, comparable to injected insulin. Levels stayed normal for 12 hours, significantly longer than the four hours for insulin delivered by needle.<\/p>\n<p>\u201cThe polymer hasn\u2019t shown any side effects in mice or pigs, but humans use insulin for decades, so we need to investigate long-term toxicity,\u201d Shen says. His team is also working on giving just the right dose, since lowering blood glucose by too much can be dangerous.<\/p>\n<p>The next step then would be human testing, where evaluating effectiveness and long-term safety will be key, says chemical engineer Robert Langer of MIT, who was not involved in the study.<\/p>\n<p>The team is already exploring through-skin delivery with other drugs, including the active ingredient in the weight-loss drug Ozempic, says Shen. \u201cThat also works very well.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"A material that slips through skin might someday make needle-free insulin possible for people with diabetes. In mice&hellip;\n","protected":false},"author":2,"featured_media":306361,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[58],"tags":[97,243],"class_list":{"0":"post-306360","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-medication","8":"tag-health","9":"tag-medication"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts\/306360","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/comments?post=306360"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/posts\/306360\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/media\/306361"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/media?parent=306360"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/categories?post=306360"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/us\/wp-json\/wp\/v2\/tags?post=306360"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}