《Biotin-decorated all-HPMA polymeric micelles for paclitaxel delivery》 was published in Journal of Controlled Release in 2020. These research results belong to Wang, Yan; van Steenbergen, Mies J.; Beztsinna, Nataliia; Shi, Yang; Lammers, Twan; van Nostrum, Cornelus F.; Hennink, Wim E.. Reference of N-Boc-1,6-Diaminohexane The article mentions the following:
To avoid poly(ethylene glycol)-related issues of nanomedicines such as accelerated blood clearance, fully N-2-hydroxypropyl methacrylamide (HPMAm)-based polymeric micelles decorated with biotin for drug delivery were designed. To this end, a biotin-functionalized chain transfer agent (CTA), 4-cyano-4-[(dodecylsulfanylthiocarbonyl)-sulfanyl]pentanoic acid (biotin-CDTPA), was synthesized for reversible addition-fragmentation chain-transfer (RAFT) polymerization Amphiphilic poly(N-2-hydroxypropyl methacrylamide)-block-poly(N-2-benzoyloxypropyl methacrylamide) (p(HPMAm)-b-p(HPMAm-Bz)) with mol. weights ranging from 8 to 24 kDa were synthesized using CDTPA or biotin-CDTPA as CTA and 2,2′-azobis(2-methylpropionitrile) as initiator. The copolymers self-assembled in aqueous media into micelles with sizes of 40-90 nm which pos. correlated to the chain length of the hydrophobic block in the polymers, whereas the critical micelle concentrations decreased with increasing hydrophobic block length. The polymer with a mol. weight of 22.1 kDa was used to prepare paclitaxel-loaded micelles which had sizes between 61 and 70 nm, and a maximum loading capacity of around 10 wt%. A549 lung cancer cells overexpressing the biotin receptor, internalized the biotin-decorated micelles more efficiently than non-targeted micelles, while very low internalization of both types of micelles by HEK293 human embryonic kidney cells lacking the biotin receptor was observed As a consequence, the paclitaxel-loaded micelles with biotin decoration exhibited stronger cytotoxicity in A549 cells than non-targeted micelles. Overall, a synthetic pathway to obtain actively targeted poly(ethylene glycol)-free micelles fully based on a poly(HPMAm) backbone was established. These polymeric micelles are promising systems for the delivery of hydrophobic anticancer drugs. In the experiment, the researchers used N-Boc-1,6-Diaminohexane(cas: 51857-17-1Reference of N-Boc-1,6-Diaminohexane)
N-Boc-1,6-Diaminohexane(cas: 51857-17-1) can be used as a linear hexyl spacer (C6-spacer) to synthesize biodegradable poly(disulfide amine)s for gene delivery, a multifunctional dendrimer for theranostics and so on.Reference of N-Boc-1,6-Diaminohexane
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics