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Natl. Acad. Sci. U.S.A."],"published-print":{"date-parts":[[2023,12,26]]},"abstract":"<jats:p>Genetic medicines have the potential to treat various diseases; however, certain ailments including inflammatory diseases and cancer would benefit from control over extracellular localization of therapeutic proteins. A critical gap therefore remains the need to develop and incorporate methodologies that allow for posttranslational control over expression dynamics, localization, and stability of nucleic acid\u2013generated protein therapeutics. To address this, we explored how the body\u2019s endogenous machinery controls protein localization through signal peptides (SPs), including how these motifs could be incorporated modularly into therapeutics. SPs serve as a virtual zip code for mRNA transcripts that direct the cell where to send completed proteins within the cell and the body. Utilizing this signaling biology, we incorporated secretory SP sequences upstream of mRNA transcripts coding for reporter, natural, and therapeutic proteins to induce secretion of the proteins into systemic circulation. SP sequences generated secretion of various engineered proteins into the bloodstream following intravenous, intramuscular, and subcutaneous SP mRNA delivery by lipid, polymer, and ionizable phospholipid delivery carriers. SP-engineered etanercept\/TNF-\u03b1 inhibitor proteins demonstrated therapeutic efficacy in an imiquimod-induced psoriasis model by reducing hyperkeratosis and inflammation. An SP-engineered anti-PD-L1 construct mediated mRNA encoded proteins with longer serum half-lives that reduced tumor burden and extended survival in MC38 and B16F10 cancer models. The modular nature of SP platform should enable intracellular and extracellular localization control of various functional proteins for diverse therapeutic applications.<\/jats:p>","DOI":"10.1073\/pnas.2313009120","type":"journal-article","created":{"date-parts":[[2023,12,18]],"date-time":"2023-12-18T15:19:04Z","timestamp":1702912744000},"update-policy":"https:\/\/doi.org\/10.1073\/pnas.cm10313","source":"Crossref","is-referenced-by-count":18,"title":["In situ production and secretion of proteins endow therapeutic benefit against psoriasiform dermatitis and melanoma"],"prefix":"10.1073","volume":"120","author":[{"given":"Qiang","family":"Cheng","sequence":"first","affiliation":[{"name":"Department of Biomedical Engineering, The University of Texas Southwestern Medical Center, Dallas, TX 75390"},{"name":"Department of Biochemistry, The University of Texas Southwestern Medical Center, Dallas, TX 75390"},{"name":"Program in Genetic Drug Engineering, The University of Texas Southwestern 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