配方和工艺参数对RNA载脂纳米粒子在雾化过程中的稳定性和生物活性的影响
Katrin F Wiebe1, Stefan C Schneid2, Werner Hoheisel3
1Department of Pharmacy, Pharmaceutical Technology and Biopharmaceutics, LMU Munich, Munich, 81377, Germany; INVITE GmbH, Leverkusen, 51368, Germany.
概括
脂质纳米颗粒 (LNP) 的雾化用于RNA输送显示了吸入的前景. 虽然siRNA LNP保持了RNA完整性和功能,但mRNA LNP降解,突出了路线特定LNP优化的需要.
科学领域:
- 纳米技术 纳米技术
- 制药科学 制药科学
- 药物运输 药物运输 药物运输
背景情况:
- 脂质纳米颗粒 (LNP) 是RNA疗法的关键纳米载体,通常通过注射给药.
- 吸入提供了一个潜在的替代输送路径,为肺部LNPs,利用其大表面积和血管化.
- 振动网状雾化器使患者友好,高剂量的LNP输送,但给配方带来压力.
研究的目的:
- 研究雾化对脂质纳米粒子 (LNP) 的物理化学性质和生物活性的影响.
- 了解如何配方和过程参数影响LNP稳定性和RNA完整性在雾化过程中.
- 为了比较小干扰RNA (siRNA) LNP与信使RNA (mRNA) LNP在雾化后的行为.
主要方法:
- 评估LNP属性,包括粒子大小分布和泽塔潜力.
- 在雾化后评估了体外活性和RNA完整性.
- 研究了温度,度,缓冲器类型和RNA模式等变量的影响.
主要成果:
- 装有siRNA的LNP聚合但保护封装RNA免受降解,保持生物功能.
- 载有mRNA的LNP在雾化后经历了载荷降解和生物功能的减弱.
- 配方和工艺参数显著影响了LNP特性和RNA稳定性.
结论:
- 雾化可以保持siRNA载荷的LNP的完整性和功能,支持它们用于吸入治疗.
- 在雾化过程中,mRNA LNP更容易降解,这可能是由于mRNA敏感性和LNP形态.
- 优化LNP对于吸入输送至关重要,与注射配方相比,它需要不同的质量标准.
相关概念视频
01:28Factors Influencing Drug Absorption: Pharmaceutical Parameters
383
Solid dosage forms such as tablets and capsules undergo rigorous manufacturing processes to ensure stability and effectiveness. Their dissolution and absorption properties are influenced significantly by the choice of excipients (inactive ingredients that serve various roles in the formulation), and the methodology applied during production. The manufacturing parameters, such as compression force and granulation techniques, significantly affect dissolution rates. Elevated compression forces...
383
01:23Factors Affecting Dissolution: Particle Size and Effective Surface Area
1.6K
Dissolution kinetics, an essential aspect of oral drug delivery, is significantly influenced by the drug's particle size. According to the Noyes-Whitney dissolution model, the dissolution rate correlates directly with the drug's surface area. The larger the surface area, the higher the drug's solubility in water, leading to a faster drug dissolution rate. Reducing particle size increases the effective surface area, enhancing the dissolution process. Micronization and nanosizing are...
1.6K
01:05Bioavailability Enhancement: Drug Stability Enhancement and GI Retention
185
Body:Improving a drug's stability in the gastrointestinal (GI) tract is paramount for enhancing its bioavailability and therapeutic effectiveness. Various strategies are employed to protect the drug from the harsh gastric milieu and to ensure its release and absorption at the desired site within the GI tract.Polymer coatings are one such method used to shield drugs from the stomach's acidic environment. By preventing premature drug release, these coatings improve the bioavailability of unstable...
185
01:16Bioavailability Enhancement: Drug Solubility Enhancement
204
Body:Bioavailability is a critical factor in determining a drug's effectiveness. It refers to the proportion of a drug that enters the circulation when introduced into the body and is, as a result, able to have an active effect. Enhancing bioavailability is essential for drugs with poor solubility, as it can significantly impact their therapeutic efficacy. Various methods are employed to increase the solubility of drugs, thereby enhancing their bioavailability.Micronization and nanonization are...
204
01:20Factors Affecting Dissolution: Drug Permeability, Stability and Stereochemistry
481
Orally administered drugs primarily enter the systemic circulation via passive diffusion through the intestinal membranes. The drug's absorption is influenced by drug stability in the gastrointestinal GI tract, membrane permeability, the surface area available for absorption, luminal drug concentration, and residence time in the lumen. Drug permeability can be enhanced by adjusting the lipophilicity, polarity, or molecular size of the drug, promoting its passive transport across intestinal...
481
01:27Bioavailability Enhancement: Drug Permeability Enhancement
176
Body:After oral administration, poor permeability often limits the rate at which drugs are absorbed through the intestinal epithelium. Enhancing drug permeability is crucial for effective therapy, and several strategies have been developed to overcome this challenge.One effective strategy involves the use of lipid-based formulations. These formulations enhance dissolution and solubility, targeting physiological mechanisms to increase drug absorption. This includes stimulating bile salt...
176