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system (CNS), driving the need for innovative drug delivery strategies. Among these, nanoparticles (NPs) have gained attention due to their ability to enhance drug transport, improve bioavailability, and enable targeted delivery. Methods: This paper explores various surface modification strategies employed to optimize NP-mediated drug delivery across the BBB. Specifically, the functionalization of NPs with ligands such as transferrin (Tf), lactoferrin (Lf), protamine, and insulin is discussed, each demonstrating unique mechanisms for enhancing brain-targeting efficiency. In addition, this work provides a comprehensive overview of recent scientific advancements and market strategies aimed at accelerating the adoption of low-cost, surface-modified nanoparticles, ultimately improving patient access to effective CNS treatments. Conclusions: Preclinical and in vitro studies have demonstrated the effectiveness of these modifications in increasing drug retention and bioavailability in brain tissues. Additionally, while ligand-conjugated NPs hold significant promise for neuropharmacology, their clinical translation is often hindered by regulatory and economic constraints. Lengthy approval processes can slow market entry, but cost\u2013benefit analyses indicate that surface-modified NPs remain financially viable, particularly as scalable manufacturing techniques and some ligands are cost-efficient.<\/jats:p>","DOI":"10.3390\/pharmaceutics17050661","type":"journal-article","created":{"date-parts":[[2025,5,20]],"date-time":"2025-05-20T04:48:18Z","timestamp":1747716498000},"page":"661","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":18,"title":["Advancing Brain Targeting: Cost-Effective Surface-Modified Nanoparticles for Faster Market Entry"],"prefix":"10.3390","volume":"17","author":[{"given":"Mariana","family":"Gomes","sequence":"first","affiliation":[{"name":"LEPABE\u2014Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2428-7520","authenticated-orcid":false,"given":"Maria Jo\u00e3o","family":"Ramalho","sequence":"additional","affiliation":[{"name":"LEPABE\u2014Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal"},{"name":"ALiCE\u2014Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9841-3967","authenticated-orcid":false,"given":"Joana A.","family":"Loureiro","sequence":"additional","affiliation":[{"name":"LEPABE\u2014Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal"},{"name":"ALiCE\u2014Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal"},{"name":"Department of Mechanical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8505-3432","authenticated-orcid":false,"given":"Maria Carmo","family":"Pereira","sequence":"additional","affiliation":[{"name":"LEPABE\u2014Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal"},{"name":"ALiCE\u2014Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal"}]}],"member":"1968","published-online":{"date-parts":[[2025,5,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"217","DOI":"10.1038\/s41392-023-01481-w","article-title":"The blood-brain barrier: Structure, regulation, and drug delivery","volume":"8","author":"Wu","year":"2023","journal-title":"Sig. 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