{"id":288665,"date":"2026-02-13T03:33:06","date_gmt":"2026-02-13T03:33:06","guid":{"rendered":"https:\/\/www.newsbeep.com\/il\/288665\/"},"modified":"2026-02-13T03:33:06","modified_gmt":"2026-02-13T03:33:06","slug":"antigen-orientation-boosts-hpv-cancer-sna-vaccine-slows-tumors-in-models","status":"publish","type":"post","link":"https:\/\/www.newsbeep.com\/il\/288665\/","title":{"rendered":"Antigen Orientation Boosts HPV Cancer SNA Vaccine, Slows Tumors in Models"},"content":{"rendered":"

\"\"<\/a>An artistic interpretation of a spherical nucleic acid (SNA) nanoparticle carrying HPV antigen (E7\u2081\u2081\u2013\u2081\u2089) and CpG adjuvant DNA interacting with scavenger receptor A to facilitate cellular internalization. Display and N-terminal orientation of the HPV antigen on N-HSNAs enhance antigen-specific CD8\u207a T-cell responses and anti-tumor activity. [Connor Forsyth and Jake Cohen \/ Mirkin Research Group \/ Northwestern University]<\/p>\n

Biologists often say that structure determines function. In a new study, Northwestern University researchers show that this principle applies not only to proteins but may also to cancer vaccines\u2014where the nanoscale arrangement of a single peptide can dramatically alter therapeutic potency. By re\u2011engineering the orientation of an HPV\u2011derived antigen on a spherical nucleic acid (SNA) platform, the team created a vaccine that slowed tumor growth and extended survival in preclinical models of HPV\u2011driven cancer.<\/p>\n

The work, published in Science Advances and titled \u201cE711\u201119 Placement and Orientation Dictate CD8\u207a T Cell Response in Structurally Defined Spherical Nucleic Acid Vaccines<\/a>,\u201d explores how subtle architectural changes can reshape immune activation. HPV\u2011positive head and neck cancers, which are rising in incidence, often present at advanced stages and are treated with toxic regimens, according to the authors. While prophylactic HPV vaccines prevent infection, they do not help patients with established tumors\u2014leaving a need for therapeutic strategies that can safely drive strong cytotoxic T\u2011cell responses.<\/p>\n

To address this, the researchers designed three SNA\u2011based vaccines containing identical components: a lipid core, CpG adjuvant, and a short HPV16 E711\u201119 peptide. The only difference was how the antigen was displayed. One formulation buried the peptide inside the nanoparticle, while two others attached it to the surface through either the N\u2011terminus or C\u2011terminus\u2014a small structural shift with potentially large immunological consequences.<\/p>\n

The differences were striking. All three SNAs enhanced dendritic cell activation and CD8\u207a T\u2011cell cytotoxicity compared to a simple peptide\u2011adjuvant mixture, but the N\u2011terminally displayed version, dubbed N\u2011HSNA, consistently outperformed the others. It induced roughly eight\u2011fold higher interferon\u2011\u03b3 secretion and about 2.5\u2011fold greater cytotoxicity in primary human cells, the authors wrote.<\/p>\n

In tumor\u2011bearing AAD mice, the N\u2011HSNA formulation cut tumor burden by more than threefold and extended survival, while also driving a noticeable expansion of CD8\u207a T cells. The same design performed strongly in patient\u2011derived HPV\u2011positive head and neck cancer spheroids, where it produced roughly a 2.5\u2011fold increase in tumor\u2011cell killing\u2014a sign that the structural tuning may translate across model systems.<\/p>\n

The findings highlight the emerging field of \u201cstructural nanomedicine,\u201d which emphasizes the deliberate arrangement of vaccine components rather than simply mixing them together\u2014what lead author Chad A. Mirkin, PhD, calls the \u201cblender approach.\u201d<\/p>\n

\u201cThere are thousands of variables in the large, complex medicines that define vaccines,\u201d said Mirkin, the George B. Rathmann Professor at Northwestern. \u201cThe promise of structural nanomedicine is being able to identify the configurations that lead to the greatest efficacy and least toxicity. In other words, we can build better medicines from the bottom up.\u201d<\/p>\n

By demonstrating that antigen placement and orientation can dictate immune potency, the study provides a blueprint for revisiting past cancer vaccines that failed not because of their ingredients, but perhaps because of their architecture. The authors suggest that rational design\u2014potentially aided by machine learning\u2014could accelerate the development of more effective therapeutic vaccines for HPV\u2011driven tumors and beyond.<\/p>\n","protected":false},"excerpt":{"rendered":"An artistic interpretation of a spherical nucleic acid (SNA) nanoparticle carrying HPV antigen (E7\u2081\u2081\u2013\u2081\u2089) and CpG adjuvant DNA…\n","protected":false},"author":2,"featured_media":288666,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[147201,165,147202,32599,163,29470,85,46,105965,43,3171,8351,9804],"class_list":{"0":"post-288665","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-health","8":"tag-antigens","9":"tag-cancer","10":"tag-cytotoxic-t-cells","11":"tag-head-and-neck-cancer","12":"tag-health","13":"tag-human-papillomavirus","14":"tag-il","15":"tag-israel","16":"tag-nanomedicine","17":"tag-news","18":"tag-topics","19":"tag-translational-medicine","20":"tag-vaccines"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/posts\/288665","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/comments?post=288665"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/posts\/288665\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/media\/288666"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/media?parent=288665"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/categories?post=288665"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/il\/wp-json\/wp\/v2\/tags?post=288665"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}