Maximizing the delivery and efficacy of miRNA therapeutics through nanocarrier design
Maximizing the delivery and efficacy of miRNA therapeutics through nanocarrier design
批准号:
9323466
负责人:
Emily S Day
金额:
$38.15万
依托单位:
依托单位国家:
美国
项目类别:
财政年份:
2016
资助国家:
美国
项目状态:
已结题
起止时间:
2016-08-01 至 2021-05-31
关键词:
AddressAntibodiesBindingBiodistributionBiologicalBlood CirculationBreast Cancer ModelCell Surface ReceptorsCellsClinicalClinical TrialsDiseaseDisease ProgressionFutureGene ExpressionGene Expression RegulationGene TargetingHalf-LifeInterventionKnowledgeMediatingMessenger RNAMicroRNAsOsteoporosisOutcomeProcessProteinsRNARNA DegradationResearch PersonnelResistanceShapesSignal TransductionSiteSystemTherapeuticTissuesTranslational Repressionbiological systemschemical propertyclinical translationdesignexperiencein vivointerestmalignant breast neoplasmnanocarriernanoparticlenucleasephysical propertyreceptortargeted agenttooltraffickinguptake
中文摘要
项目摘要/摘要:
--
被称为微RNA(MiRNAs)的非编码核糖核酸分子(MiRNAs)最近变得非常重要。
生物信息学监管机构表示,可能会通过信使RNA降解抑制靶基因的表达。
翻译和抑制。由于miRNAs不能调节基因的表达,因此人们对利用这些基因有强烈的兴趣。
分子是阻止疾病进展的重要工具。不幸的是,这些裸露的miRNAs并不太适合临床使用。
研究人员表示,由于细胞稳定性差,血液循环有限,半衰期短,无法进入细胞。因此,研究人员表示。
已经开始尝试将miRNAs基因整合到纳米载体中,以更好地促进他们在体内的研究。同时也取得了一些进展。
虽然还没有取得进展,但仍然没有实质性的改进空间,这一事实证明了这一事实,即只有一个完整的miRNA。
纳米载体已经进入了临床试验阶段。但这表明目前还缺乏一种临床药物的翻译方法,这表明目前还没有一种非常迫切的治疗需求。
机械论研究试图阐明决定miRNA之间潜在相互作用的基本原则。
我们的目标是通过充分利用我们在生物领域独一无二的技术专长来解决这一需求。
纳米颗粒的设计,其中包括使用miRNA纳米载体和靶向纳米颗粒的经验。
系统。更具体地说,我们将进一步阐明MmiRNA和纳米载体的物理和化学特性是如何变化的。
对五项具体研究结果的影响,这些结果与解决与体内基因治疗和miRNA基因传递相关的主要挑战有关。
包括:细胞稳定性和核酸酶抗性、细胞摄取和细胞内转运、基因调控和效力等。
生物分布、营养和能力有助于阻止包括乳腺癌和骨质疏松症在内的多种疾病的进展。
通过对这五项研究成果的研究,我们可以增加对DNA miRNA和纳米载体对人类健康影响的理解。
主体,以及主体对MmiRNA和纳米载体的影响。这将使我们能够建立一套完整的设计体系。
这些规则将管理MmiRNA和纳米载体与生物免疫系统之间的相互作用,以及它们可能无法实现的相互作用。
在miRNA和纳米载体的全新合成技术中应用,以最大限度地利用它们的特定部位--特定的药物传递能力和疗效。
在未来五年的时间里,我们将继续明确地专注于研究如何将靶向药物整合到MmiRNA中。
纳米载体对上述五种药物结果的影响。这是通过比较不同类型的药物靶向药物来实现的。
(例如,抗体或蛋白质),我们还可以增加对纳米颗粒与蛋白质相互作用的机制的了解。
细胞表面受体对信号转导的影响。我们假设靶向是药物。
不仅可以促进细胞之间的结合,而且还可以通过受体--介导的信号传递过程来操纵细胞信号传导。
这个假说是不正确的,它结合了miRNA的递送过程和靶向的信号-介导的信号级联。
操纵技术可能还会对患病的细胞产生协同效应。更重要的是,在未来的未来,我们将继续扩大我们的研究范围。
研究将进一步调查MmiRNA纳米载体的其他特征,如其大小、形状、结构和硬度。这项研究将使我们能够。
美国需要进一步区分这种纳米载体本身是如何影响各种生物实验结果的。这是一项重要的研究信息。
这将使我们能够创建更准确的基因设计和规则,这将有助于更高效和更临床的新基因miRNA的翻译技术。
纳米载体有助于疾病的治疗和干预。
英文摘要
PROJECT SUMMARY/ABSTRACT
Noncoding ribonucleic acid molecules called microRNAs (miRNAs) have recently emerged as important
biological regulators that suppress the expression of target genes via messenger RNA degradation or
translational repression. Since miRNAs can regulate gene expression, there is intense interest in utilizing these
molecules as tools to halt disease progression. Unfortunately, naked miRNAs are not suitable for clinical use
due to their poor stability, limited circulation half-‐‑life, and inability to enter cells. Accordingly, researchers
have begun to incorporate miRNAs into nanocarriers to facilitate their in vivo delivery. While some progress
has been made, there is substantial room for improvement, evidenced by the fact that only a single miRNA
nanocarrier has entered clinical trials. This lack of clinical translation indicates there is an urgent need for
mechanistic studies to elucidate the underlying principles that dictate the interactions between miRNA
nanocarriers and biological systems. We aim to address this need by capitalizing on our unique expertise in
nanoparticle design, which includes experience with both miRNA nanocarriers and targeted nanoparticle
systems. More specifically, we will elucidate how the physical and chemical properties of miRNA nanocarriers
influence five specific outcomes related to the challenges associated with in vivo miRNA delivery. These
include: stability and nuclease resistance, cell uptake and intracellular trafficking, gene regulation potency,
biodistribution, and ability to halt progression of diseases including breast cancer and osteoporosis. By
studying these five outcomes, we can increase understanding of the effects of miRNA nanocarriers on the
body, as well as the effects of the body on miRNA nanocarriers. This will enable us to establish a set of design
rules that govern the interactions between miRNA nanocarriers and biological systems and which can be
applied in the de novo synthesis of miRNA nanocarriers to maximize their site-‐‑specific delivery and efficacy.
Over the next five years we will focus explicitly on studying how incorporating targeting agents into miRNA
nanocarriers influences the five aforementioned outcomes. By comparing different types of targeting agents
(e.g., antibodies or proteins) we can increase knowledge of the mechanisms of nanoparticle interactions with
cell surface receptors and the impact they have on signal transduction. We hypothesize that targeting agents
can not only promote cell binding, but also manipulate signaling cascades via receptor-‐‑mediated processes. If
this hypothesis is correct, combining miRNA delivery with targeting agent-‐‑mediated signal cascade
manipulation may have synergistic effects on diseased cells. Importantly, in the future we will expand our
studies to investigate other features of miRNA nanocarriers such as size, shape, and stiffness. This will enable
us to distinguish how the nanocarrier itself influences various biological outcomes. This important information
will enable creation of accurate design rules that will facilitate more efficient clinical translation of new miRNA
nanocarriers for disease intervention.
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海外基金