共查询到18条相似文献,搜索用时 281 毫秒
1.
2.
3.
《中国新药与临床杂志》2018,(1)
槲皮素虽有广泛的药理作用,但水溶性差、生物利用度低限制了其临床应用。为提高槲皮素的溶解度和生物利用度,许多学者开展了槲皮素的纳米制剂研究,如纳米结晶混悬剂、聚合物纳米粒、聚合物胶束、类脂纳米囊等。在多种恶性肿瘤的研究中,槲皮素纳米制剂均表现出抑制肿瘤生长和侵袭的作用。近年来,利用槲皮素联合化疗药物的纳米制剂也体现了更强的抗肿瘤作用。本文对槲皮素纳米制剂及其抗肿瘤作用的最新进展进行介绍。 相似文献
4.
5.
目的对纳米制剂生物安全性评价研究进行了综述。方法查阅相关文献33篇,从纳米制剂的给药途径,结构与粒径,纳米材料或载体以及生物学评价方法等多个角度对纳米制剂的安全性评价研究进展进行了分别综述,并对中药纳米制剂的特点及潜在性安全进行相关评价。结果不同纳米制剂的给药途径、粒径、结构,应用的纳米载体或纳米材料不同均会对细胞或组织的损害具有不同程度影响,同时,评价手段不同也会对评价结果乃至结论产生影响;对于多组成多成分的中药纳米制剂,更应尽快找出有效评价方法对其毒性作用做出有效评价,避免盲目的进行中药纳米制剂的开发。结论纳米制剂为一类新型有效的药物制剂,研究者不仅应致力于其制剂学的开发研究,也应从安全性角度对其进行有效评价,制定统一的评价标准是目前纳米制剂科研人员亟待解决的问题。 相似文献
6.
纳米载体是药剂学备受关注的研究领域,作为一类新型给药系统,它能显著提高难溶性药物的溶解度、生物利用度和稳定性,且具有明显的缓释作用,因此得到了广泛的应用。目前常用于提高难溶性药物口服生物利用度的纳米载体有纳米脂质体、固体脂质纳米粒、纳米胶束、和纳米结晶等,它们的粒径、表面性质及其释药环境等是影响纳米载体药物口服吸收的主要因素。本文对纳米载体提高难溶性药物口服生物利用度的研究进展作一综述。 相似文献
7.
8.
《中国药房》2017,(31):4452-4455
目的:为小干扰RNA(siRNA)纳米制剂递送的研究提供参考。方法:以"基因治疗""RNA干扰""小干扰RNA""载体系统""siRNA""Gene therapy""RNA interference""Protamine"等为关键词,组合查询1996-2016年在PubMed、中国知网、万方、维普等数据库中的相关文献,对载siRNA的纳米制剂的导入方法、载体类型及影响递送过程的主要因素进行综述。结果:共检索到相关文献500余篇,其中有效文献40篇。载siRNA的纳米制剂导入方法主要分为物理化学法和载体介导法。在载体介导法中的非病毒载体,不仅克服了siRNA半衰期短、生物利用度低等缺点,而且在一定程度上提高了siRNA的递送效率,是现代药剂学研究的一个热点。常用非病毒载体包括阳离子脂质体、二元复合物纳米载体、三元复合物纳米载体。载体靶向性修饰、粒径与表面电荷是递送siRNA纳米载体主要影响因素。siRNA的高效递送依赖于新的高效、低免疫原性载体的开发以及纳米制剂递送系统的优化。因此,可载siRNA的高效、低免疫原性纳米制剂的研究任重而道远。 相似文献
9.
10.
纳米混悬剂具有增加药物溶解度,提高生物利用度,降低毒副作用等特点,有关这方面的研究是目前纳米制剂研究的一个热点,美国FDA至今已批准多个相关产品上市。物理稳定性问题在纳米药物混悬液中比较突出,是制约纳米混悬液研发的重要因素之一。本文就纳米混悬剂物理稳定性所面临的问题、理论机制及其应对策略进行综述。 相似文献
11.
姜黄素是一种天然的多酚类化合物,广泛存在于包括姜黄在内的多种草本植物中。它是一种天然的抗氧剂,具有许多的药理活性,安全有效,尤其是抗肿瘤作用受到广泛的关注。但由于姜黄素的水中溶解度差、光降解、化学不稳定以及生物利用度低等问题限制了其在临床的广泛应用。因此,需要开发适当的给药系统来解决这一问题。本文综述了近年来姜黄素纳米制剂在肿瘤治疗中的研究进展,重点阐述了其抗肿瘤纳米制剂的种类及其在细胞和动物实验中的应用,为进一步的研发提供依据。 相似文献
12.
抗肿瘤药物水溶性差、药代动力学行为不理想等特征在临床应用中严重影响疗效。抗肿瘤纳米制剂的开发可以实现药物増溶的目的,能够改善抗肿瘤药物的药代动力学行为,具有良好的应用前景。本文综述了抗肿瘤纳米制剂的研究现状,分别从整体和细胞水平介绍其药代动力学行为特征,探讨抗肿瘤纳米制剂发挥优势可能的作用机制。 相似文献
13.
Pranav Gupta Khushboo A. Jani Dong-Hua Yang Mostafa Sadoqi Emilio Squillante 《Expert opinion on drug metabolism & toxicology》2016,12(3):281-289
Introduction: Drug resistance is the major obstacle impeding the efficacy of chemotherapeutic agents. Although numerous drug delivery techniques have been developed to combat drug resistance, their limitations of non-specific targeting and inconsistent bioavailability has led to the search of novel delivering strategies, such as nanoparticles.Areas covered: Nanoparticles for anti-cancer drug delivery are microscopic preparations encapsulating a chemotherapeutic and a chemosensitizer into a rationally designed drug delivery vehicle. Nano-strategies directed against multi-drug resistance (MDR) can be categorized into those inhibiting the drug efflux pumps, those effective against the cellular factors of drug resistance, and the combinational based strategies. Here, we review the most recent literature to reposition nanoparticles as chemotherapeutics and inhibitors of MDR.Expert Opinion: Novelty in anti-cancer drug delivery has led to the formulation of chemotherapeutics and MDR inhibitors as nano-preparations, which are multi-functional and have better tumor cell-targeting effects. Their characteristics of size and surface attachments make them readily diffusible through the tumor vasculature and increase their retention time as well. With a better understanding of the molecular mechanisms of drug resistance, more potent and multi-targeted nano-preparations can be formulated in the near future. 相似文献
14.
缺血性心脏病是严重威胁人类健康的疾病。至今为止,药物预处理和治疗依旧是心肌缺血预防和治疗的重要手段。但大多数抗心肌缺血药物缺乏组织特异性,同时由于缺血区域血液循环受阻,导致药物在缺血部位的分布往往不甚理想。靶向纳米制剂是一种治疗心血管疾病的新型给药策略。纳米制剂在体内主要可以通过"被动靶向"、"主动靶向"和"物理化学靶向"作用将药物递送至病变部位,提高药物在缺血区域的靶向性和释放率,从而改善药物治疗效果。本文对应用靶向纳米制剂治疗心肌缺血的疗效及机制研究作一综述。 相似文献
15.
16.
Biologics (i.e., nucleic acid and protein-based drugs) suffer from poor bioavailability, as membrane partitioning and intracellular targeting are a significant problem. Various strategies have been developed in an attempt to modulate biologics bioavailability by means of manipulating whole body pharmacokinetics and subcellular trafficking. Limited direct success has been observed. This review focuses on the components of nanomedicine systems rather than the whole, facilitating an overview of materials that may be of clinical relevance in the future. Some of the advantages and disadvantages associated with the use of soluble drug delivery systems are considered. Although the focus is on linear poly(amidoamine) polymers, emerging technologies capable of the delivery of large molecules to other specific intracellular compartments are also examined. The focus is maintained on cytosolic access for two reasons, initially because this intracellular compartment may be viewed as a 'gateway' to other intracellular organelles and also because this is where the greatest therapeutic benefit is likely to be found. It is likely that in the coming years and in combination with other existing, well-characterized drug delivery platform technologies, such as liposomal formulation or polymer conjugation, that the targeting of specific organelles will become more accessible. 相似文献
17.
Background and objective High levels of cholesterol lead to atherosclerosis, a factor predisposing to the development of coronary artery disease. Statin drugs, i.e. HMG‐CoA reductase inhibitors, have been known since the end of the last century for their benefits against cardio‐ and cerebrovascular diseases and are widely used clinically. This review aims at compiling the research inputs being made for developing therapeutically efficacious dosage forms that have the potential to surmount the limitations of conventional dosage forms of statins. Key findings Statin drugs can reduce the endogenous synthesis of cholesterol and prevent the onset and development of atherosclerosis, and are therefore used as an effective treatment against primary hypercholesterolemia. At present, statin drugs are most often administered orally, on a daily basis. After administration, the bioavailability and the general circulation of statin drugs is fairly low due to the first‐pass metabolism in the liver and clearance by the digestive system. Extensive pharmaceutical research in understanding the causes of low oral bioavailability has led to the development of novel technologies to address these challenges. Summary These technologies vary from conventional dosage forms to nanoparticulate drug‐delivery systems, and have the potential to cause improvements in bioavailability and consequently therapeutic efficacy. 相似文献
18.