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Biomimetic polysaccharide-cloaked lipidic nanovesicles/microassemblies for improving the enzymatic activity and prolonging the action time for hyperuricemia treatment.
Nanoscale ( IF 5.8 ) Pub Date : 2020-06-23 , DOI: 10.1039/d0nr02651d
Lan Yang 1 , Yonghong Zhang 1 , Jiangchuan Xie 1 , Cailing Zhong 1 , Dan He 1 , Tingting Wang 2 , Kailing Li 1 , Yao Li 3 , Da Shi 4 , Ruben Abagyan 4 , Lin Yang 5 , Jingqing Zhang 1
Affiliation  

The improvement and maintenance of enzymatic activities represent major challenges. However, to address these we developed novel biomimetic polysaccharide hyaluronan (Hn)-cloaked lipidic nanovesicles (BHLN) and microassemblies (BHLNM) as enzyme carriers that function by entrapping enzymes in the core or by tethering them to the inner/outer surfaces via covalent interactions. The effectiveness of these enzyme carriers was demonstrated through an evaluation of the enzymatic activity and anti-hyperuricemia bioactivity of urate oxidase (also called uricase, Uase). We showed that Uase was effectively loaded within the BHLN/BHLNM (UHLN/UHLNM) and maintained good enzymatic bioactivity through a range of effects, including isolation from the external environment due to the vesicle-carrying (shielding effect), avoidance of recognition by the reticuloendothelial system due to Hn-cloaking (long-term effect), production of beneficial conformational changes (allosteric effect) due to a favorable internal microenvironment of construction and vesicle loading, and stabilization due to the reversible conjugation of Uase or vesicle and serum albumin (deposit effect). UHLN/UHLNM had significantly increased bioavailability (∼533% and ∼331% compared to Uase) and demonstrated greatly improved efficacy, whereby the time required for UHLN/UHLNM to lower the plasma uric acid concentration to a normal level was much shorter than that for free Uase. The interactions of the therapeutic enzyme (Uase), biomimetic membrane components (Hn and phospholipid), and serum albumin were investigated with a fluorescent probe and computational simulations to help understand the superior properties of UHLN/UHLNM.

中文翻译:

仿生多糖隐蔽的脂质纳米囊泡/微组件,可改善酶活性并延长高尿酸血症治疗的作用时间。

酶活性的改善和维持是主要的挑战。但是,为了解决这些问题,我们开发了新型仿生多糖透明质酸(Hn)掩盖的脂质纳米囊泡(BHLN)和微组件(BHLNM)作为酶载体,其作用是通过将酶截留在核心中或通过将它们束缚到内/外表面来实现共价相互作用。通过评估尿酸盐氧化酶(也称为尿酸酶,Uase)的酶活性和抗高尿酸血症生物活性,证明了这些酶载体的有效性。我们显示Uase有效地负载在BHLN / BHLNM(UHLN / UHLNM)内,并通过一系列作用保持了良好的酶促生物活性,这些作用包括由于囊泡携带而与外界环境隔离(屏蔽作用), Hn掩盖引起的网状内皮系统(长期作用),有利的构象变化(构象作用)产生有益的构象变化(变构作用),以及Uase或囊泡与血清白蛋白的可逆结合导致稳定存款效果)。UHLN / UHLNM的生物利用度显着提高(与Uase相比,约为533%和331%),并且功效大大提高,因此UHLN / UHLNM将血浆尿酸浓度降低至正常水平所需的时间大大短于UHLN / UHLNM免费的Uase。用荧光探针和计算机模拟研究了治疗性酶(Uase),仿生膜成分(Hn和磷脂)和血清白蛋白之间的相互作用,以帮助理解UHLN / UHLNM的优越性能。
更新日期:2020-07-23
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