A novel mertansine conjugate for acid-reversible targeted drug delivery validated through the Avidin-Nucleic-Acid-NanoASsembly platform

IF 4.2 2区医学 Q2 MEDICINE, RESEARCH & EXPERIMENTAL Nanomedicine : nanotechnology, biology, and medicine Pub Date : 2024-09-03 DOI:10.1016/j.nano.2024.102784

Elisa Schiavon MSc , Sara Rezzola PhD , Erica Filippi MSc , Marta Turati PhD , Sofia Parrasia PhD , Simone Bernardotto MSc , Martina Stocco MSc , Ildikò Szabò PhD , Andrea Mattarei PhD , Roberto Ronca PhD , Margherita Morpurgo PhD

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Abstract

In targeted cancer therapy, antibody-drug-conjugates using mertansine (DM1)-based cytotoxic compounds rely on covalent bonds for drug conjugation. Consequently, the cytotoxic DM1 derivative released upon their proteolytic digestion is up to 1000-fold less potent than DM1 and lacks a bystander effect. To overcome these limitations, we developed a DM1 derivative (keto-DM1) suitable for bioconjugation through an acid-reversible hydrazone bond. Its acid-reversible hydrazone conjugate with biotin (B-Hz-DM1) was generated and tested for efficacy using the cetuximab-targeted Avidin-Nucleic-Acid-NanoASsembly (ANANAS) nanoparticle (NP) platform.

NP-tethered B-Hz-DM1 is stable at neutral pH and releases its active moiety only in endosome/lysosome mimicking acidic pH. In vitro, the NP/Cetux/B-Hz-DM1 assembly showed high potency on MDA-MB231 breast cancer cells. In vivo both B-Hz-DM1 and NP/Cetux/B-Hz-DM1 reduced tumor growth. A significantly major effect was exerted by the nanoformulation, associated with an increased in situ tumor cell death. Keto-DM1 is a promising acid-reversible mertansine derivative for targeted delivery in cancer therapy.

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通过 Avidin-Nucleic-Acid-NanoASsembly 平台验证了用于酸可逆靶向给药的新型默坦宁共轭物。

在癌症靶向治疗中，使用基于美金刚烷（DM1）的细胞毒性化合物的抗体-药物共轭物依靠共价键进行药物共轭。因此，其蛋白水解后释放的细胞毒性 DM1 衍生物的效力比 DM1 低达 1000 倍，而且缺乏旁观者效应。为了克服这些局限性，我们通过酸可逆腙键开发了一种适合生物共轭的 DM1 衍生物（酮-DM1）。我们生成了其与生物素的酸可逆腙共轭物（B-Hz-DM1），并使用西妥昔单抗靶向阿维丁-核酸-纳米组装（ANANAS）纳米粒子（NP）平台进行了药效测试。NP系留的B-Hz-DM1在中性pH值下稳定，只有在模拟酸性pH值的内膜/溶酶体中才会释放其活性分子。在体外，NP/Cetux/B-Hz-DM1组装体对MDA-MB231乳腺癌细胞具有很高的效力。在体内，B-Hz-DM1 和 NP/Cetux/B-Hz-DM1 都能减少肿瘤生长。纳米制剂具有明显的主要效果，与肿瘤细胞原位死亡增加有关。Keto-DM1是一种很有前景的酸性可逆默坦辛衍生物，可用于癌症治疗的靶向递送。

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来源期刊

Nanomedicine : nanotechnology, biology, and medicine 工程技术-纳米科技

CiteScore

11.10

自引率

0.00%

发文量

133

审稿时长

42 days

期刊介绍： The mission of Nanomedicine: Nanotechnology, Biology, and Medicine (Nanomedicine: NBM) is to promote the emerging interdisciplinary field of nanomedicine. Nanomedicine: NBM is an international, peer-reviewed journal presenting novel, significant, and interdisciplinary theoretical and experimental results related to nanoscience and nanotechnology in the life and health sciences. Content includes basic, translational, and clinical research addressing diagnosis, treatment, monitoring, prediction, and prevention of diseases.