Rational engineering of single-chain polypeptides into protein-only, BBB-targeted nanoparticles

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• 作者：Naroa Serna ; BSc^a ; ^b ; ^c ; Marí ; a Virtudes Cé ; spedes ; PhD^c ; ^d ; Paolo Saccardo ; PhD^a ; ^b ; ^c ; Zhikun Xu ; PhD^a ; ^b ; ^c ; Ugutz Unzueta ; PhD^c ; ^d ; Patricia &Aacute ; lamo ; PhD^c ; ^d ; Mireia Pesarrodona ; BSc^a ; ^b ; ^c ; Alejandro S&aacute ; nchez-Chardi ; PhD^e ; Mó ; nica Rold&aacute ; n ; PhD^e ; Ramó ; n Mangues ; PhD^c ; ^d ; Esther V&aacute ; zquez ; PhD^a ; ^b ; ^c ; Antonio Villaverde ; PhD^a ; ^b ; ^c ; ^{antoni.villaverde@uab.cat" class="auth_mail" title="E-mail the corresponding author} ; Neus Ferrer-Miralles ; PhD^a ; ^b ; ^c ; ^{neus.ferrer@uab.cat" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Protein engineering ; Nanoparticles ; Self-assembling ; Biodistribution ; LDLR
• 刊名：Nanomedicine: Nanotechnology, Biology and Medicine
• 出版年：2016
• 出版时间：July 2016
• 年：2016
• 卷：12
• 期：5
• 页码：1241-1251
• 全文大小：1358 K

文摘

A single chain polypeptide containing the low density lipoprotein receptor (LDLR) ligand Seq-1 with blood–brain barrier (BBB) crossing activity has been successfully modified by conventional genetic engineering to self-assemble into stable protein-only nanoparticles of 30 nm. The nanoparticulate presentation dramatically enhances in vitro, LDLR-dependent cell penetrability compared to the parental monomeric version, but the assembled protein does not show any enhanced brain targeting upon systemic administration. While the presentation of protein drugs in form of nanoparticles is in general advantageous regarding correct biodistribution, this principle might not apply to brain targeting that is hampered by particular bio-physical barriers. Irrespective of this fact, which is highly relevant to the nanomedicine of central nervous system, engineering the cationic character of defined protein stretches is revealed here as a promising and generic approach to promote the controlled oligomerization of biologically active protein species as still functional, regular nanoparticles.