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Targeted NAD+ repletion via biomimetic nanoparticle enables simultaneous management of intimal hyperplasia and accelerated re-endothelialization: A proof-of-concept study toward next-generation of endothelium-protective, anti-restenotic therapy 通过仿生纳米粒子靶向补充 NAD+ 可同时治疗内膜增生和加速内皮再形成:面向下一代内皮保护和抗血管再狭窄疗法的概念验证研究。
IF 10.5 1区 医学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-11-01 DOI: 10.1016/j.jconrel.2024.10.045
Li Yin , Yao Tong , Ruosen Xie , Zhanpeng Zhang , Zain Husain Islam , Kaijie Zhang , Jacobus Burger , Nicholas Hoyt , Eric William Kent , William Aaron Marcum , Campbell Johnston , Rohan Kanchetty , Zoe Tetz , Sophia Stanisic , Yitao Huang , Lian-Wang Guo , Shaoqin Gong , Bowen Wang
Endovascular interventions often fail due to restenosis, primarily caused by smooth muscle cell (SMC) proliferation, leading to intimal hyperplasia (IH). Current strategies to prevent restenosis are far from perfect and impose significant collateral damage on the fragile endothelial cell (EC), causing profound thrombotic risks. Nicotinamide adenine dinucleotide (NAD+) is a co-enzyme and signaling substrate implicated in redox and metabolic homeostasis, with a pleiotropic role in protecting against cardiovascular diseases. However, a functional link between NAD+ repletion and the delicate duo of IH and EC regeneration has yet to be established. NAD+ repletion has been historically challenging due to its poor cellular uptake and low bioavailability. We have recently invented the first nanocarrier that enables direct intracellular delivery of NAD+ in vivo. Combining the merits of this prototypic NAD+-loaded calcium phosphate (CaP) nanoparticle (NP) and biomimetic surface functionalization, we created a biomimetic P-NAD+-NP with platelet membrane coating, which enabled an injectable modality that targets IH with excellent biocompatibility. Using human cell primary culture, we demonstrated the benefits of NP-assisted NAD+ repletion in selectively inhibiting the excessive proliferation of aortic SMC, while differentially protecting aortic EC from apoptosis. Moreover, in a rat balloon angioplasty model, a single-dose treatment with intravenously injected P-NAD+-NP immediately post angioplasty not only mitigated IH, but also accelerated the regeneration of EC (re-endothelialization) in vivo in comparison to control groups (i.e., saline, free NAD+ solution, empty CaP-NP). Collectively, our current study provides proof-of-concept evidence supporting the role of targeted NAD+ repletion nanotherapy in managing restenosis and improving reendothelialization.
血管内介入治疗经常因再狭窄而失败,再狭窄主要是由平滑肌细胞(SMC)增殖导致内膜增生(IH)引起的。目前预防再狭窄的策略远非完美,而且会对脆弱的内皮细胞(EC)造成严重的附带损伤,导致严重的血栓风险。烟酰胺腺嘌呤二核苷酸(NAD+)是一种辅酶和信号底物,与氧化还原和代谢平衡有关,在预防心血管疾病方面具有多重作用。然而,NAD+ 的补充与 IH 和 EC 再生这微妙的二重奏之间的功能性联系尚未确立。由于 NAD+ 的细胞摄取能力差、生物利用率低,因此补充 NAD+ 一直是一项挑战。我们最近发明了第一种纳米载体,可在体内直接在细胞内输送 NAD+。结合这种原型 NAD + 负载磷酸钙(CaP)纳米粒子(NP)和仿生表面功能化的优点,我们创造了一种具有血小板膜涂层的仿生 P-NAD + -NP,从而实现了一种针对 IH 的注射方式,并具有良好的生物相容性。利用人体细胞原代培养,我们证明了 NP 辅助 NAD+ 补充在选择性抑制主动脉 SMC 过度增殖方面的益处,同时还能在不同程度上保护主动脉 EC 免受凋亡。此外,在大鼠球囊血管成形术模型中,与对照组(即生理盐水、游离 NAD+ 溶液、空 CaP-NP)相比,血管成形术后立即静脉注射 P-NAD + -NP 的单剂量治疗不仅减轻了 IH,还加速了体内 EC 的再生(再内皮化)。总之,我们目前的研究提供了概念证明,支持靶向 NAD+ 补充纳米疗法在控制再狭窄和改善再内皮化方面的作用。
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引用次数: 0
Extracellular vesicles powered cancer immunotherapy: Targeted delivery of adenovirus-based cancer vaccine in humanized melanoma model 细胞外囊泡驱动癌症免疫疗法:在人源化黑色素瘤模型中靶向递送基于腺病毒的癌症疫苗。
IF 10.5 1区 医学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-11-01 DOI: 10.1016/j.jconrel.2024.10.057
Sara Mathlouthi , Lukasz Kuryk , Marta Prygiel , Maria Giovanna Lupo , Aleksandra Anna Zasada , Cristiano Pesce , Nicola Ferri , Beate Rinner , Stefano Salmaso , Mariangela Garofalo
Malignant melanoma, a rapidly spreading form of skin cancer, is becoming more prevalent worldwide. While surgery is successful in treating early-stage melanoma, patients with advanced disease have only a 20 % chance of surviving beyond five years. Melanomas with mutations in the NRAS gene are characterized for a more aggressive tumor biology, poorer prognosis and shorter survival. Hence, new therapeutic strategies are needed, especially for this specific group of patients. Novel approaches, such as cancer vaccines, offer promising solutions by stimulating the anti-tumor immune response. Nevertheless, their clinical efficacy is still modest and more effective approaches are required. Herein, we propose the systemic administration of the adenovirus-based cancer vaccine complexed in extracellular vesicles (EVs) with the aim of achieving a targeted therapeutic effect. The vaccine was based on previously tested oncolytic adenovirus Ad5/3-D24-ICOSL-CD40L in combination with melanoma-specific antigens targeting NRAS mutations to enhance the anticancer effect. The antineoplastic properties of the oncolytic vaccine were evaluated in xenograft MUG Mel-2 melanoma BALB/c nude mice. Moreover, to mimic the tumor microenvironment, while investigating at the same time immune cell infiltration and drug penetration, we established a 3D co-culture model based on human NRAS mutated MUG Mel-2 spheroids and PBMCs (HLA matched), which displayed a synergistic effect when treated with the cancer vaccine compared to relative controls. Subsequently, we investigated the systemic delivery of the vaccine in EV formulations in a humanized NSG MUG Mel-2 melanoma mouse model. Our study provides a promising strategy for a tumor-targeted vaccine delivery by EVs, resulting in improved anticancer efficacy and increased infiltration of tumor-infiltrating lymphocytes. This study explores the potential of EVs for the selective delivery of cancer vaccines against malignancies, such as NRAS melanoma. Overall, this research could pave the way for applying autologous EVs as a safe and efficacious tool for targeted cancer therapy.
恶性黑色素瘤是一种迅速扩散的皮肤癌,在全球的发病率越来越高。虽然手术能成功治疗早期黑色素瘤,但晚期患者只有 20% 的机会存活超过 5 年。NRAS基因突变的黑色素瘤具有肿瘤生物学侵袭性更强、预后更差和生存期更短的特点。因此,我们需要新的治疗策略,尤其是针对这一特殊群体的患者。癌症疫苗等新方法通过刺激抗肿瘤免疫反应提供了有希望的解决方案。然而,它们的临床疗效仍然有限,需要更有效的方法。在此,我们建议全身性注射以腺病毒为基础的癌症疫苗,并将其与细胞外囊泡 (EVs) 复合物,以达到有针对性的治疗效果。该疫苗基于之前测试过的溶瘤腺病毒 Ad5/3-D24-ICOSL-CD40L,并结合了针对 NRAS 突变的黑色素瘤特异性抗原,以增强抗癌效果。在异种移植 MUG Mel-2 黑色素瘤 BALB/c 裸鼠中评估了溶瘤疫苗的抗肿瘤特性。此外,为了模拟肿瘤微环境,同时研究免疫细胞浸润和药物渗透,我们建立了一个基于人NRAS突变MUG Mel-2球形体和PBMC(HLA匹配)的三维共培养模型。随后,我们研究了在人源化 NSG MUG Mel-2 黑色素瘤小鼠模型中以 EV 制剂全身性递送疫苗的情况。我们的研究为通过EV递送肿瘤靶向疫苗提供了一种前景广阔的策略,从而提高了抗癌效果并增加了肿瘤浸润淋巴细胞的浸润。这项研究探索了利用 EVs 选择性递送癌症疫苗以对抗 NRAS 黑色素瘤等恶性肿瘤的潜力。总之,这项研究可为应用自体 EV 作为癌症靶向治疗的安全有效工具铺平道路。
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引用次数: 0
Immunomodulatory microneedle patch for enhanced Ferroptosis and immunogenic cell death in postoperative tumor therapy 免疫调节微针贴片用于增强肿瘤术后治疗中的铁凋亡和免疫性细胞死亡。
IF 10.5 1区 医学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-10-31 DOI: 10.1016/j.jconrel.2024.10.042
Yuqin Wang , Quanmin Wang , Qingguo Zhong , Yanteng Xu , Chunxiong Zheng , Mingqiang Li , Yu Tao , Enguo Ju
Microneedle technologies have emerged as a promising transdermal drug delivery platform for postoperative tumor therapy. Despite their potential, enhancing intracellular drug delivery to tumor cells and boosting the therapeutic efficiency of microneedles pose significant challenges. Herein, we develop a nanomedicine-loaded microneedle to enhance the induction of ferroptosis and immunogenic cell death for postoperative tumor therapy. This advancement is achieved by pre-formulating small molecule drugs with transition metal and protein templates into nanomedicine. Upon insertion into the tumors, the microneedle rapidly dissolves, facilitating the release and subsequent cellular uptake of the nanomedicine by tumor cells. Notably, the nanomedicine can release Mn ions and ferroptosis-inducer sulfasalazine (SAS) under acidic conditions. Furthermore, the released Mn ions can produce reactive oxygen species, which decrease the levels of glutathione (GSH) and glutathione peroxidase 4 (GPX4) with increased lipid peroxidation and enhanced induction of ferroptosis. Besides, the treatment stimulates immunogenic cell death through the cell surface exposure of calreticulin (CRT) and release of high-mobility group box 1 (HMGB1), which further stimulates dendric cell maturation, T cell infiltration, and macrophage polarization towards the M1 phenotype. Consequently, this strategy significantly inhibits postoperative tumor regrowth and extends overall survival. Our study indicates the potential of the combination of nanomedicine and microneedle to improve postoperative therapeutic efficiency.
微针技术已成为肿瘤术后治疗中一种前景广阔的透皮给药平台。尽管微针技术潜力巨大,但加强细胞内药物对肿瘤细胞的输送和提高微针的治疗效率仍是一项重大挑战。在此,我们开发了一种纳米药物微针,以增强诱导铁变态反应和免疫性细胞死亡,用于术后肿瘤治疗。这一进步是通过将小分子药物与过渡金属和蛋白质模板预先配制成纳米药物实现的。插入肿瘤后,微针会迅速溶解,促进纳米药物的释放并随后被肿瘤细胞吸收。值得注意的是,在酸性条件下,纳米药物可释放锰离子和铁突变诱导剂磺胺沙拉嗪(SAS)。此外,释放出的锰离子可产生活性氧,从而降低谷胱甘肽(GSH)和谷胱甘肽过氧化物酶 4(GPX4)的水平,增加脂质过氧化和诱导铁变态反应。此外,治疗还会通过细胞表面的钙网蛋白(CRT)暴露和高迁移率基团框 1(HMGB1)释放刺激免疫原性细胞死亡,从而进一步刺激树突细胞成熟、T 细胞浸润和巨噬细胞向 M1 表型极化。因此,这种策略能明显抑制术后肿瘤的再生,并延长总生存期。我们的研究表明,纳米药物和微针的结合具有提高术后治疗效率的潜力。
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引用次数: 0
Targeted delivery of rapamycin and inhibition of platelet adhesion with multifunctional peptide nanoparticles for atherosclerosis treatment 利用多功能多肽纳米颗粒靶向输送雷帕霉素和抑制血小板粘附,治疗动脉粥样硬化症
IF 10.5 1区 医学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-10-31 DOI: 10.1016/j.jconrel.2024.10.051
Anqi Wang , Kai Yue , Weishen Zhong , Genpei Zhang , Xinxin Zhang , Lei Wang
There is increasing evidence supporting the unique benefits of targeted therapy in treating atherosclerotic disease. Given the complex nature of atherosclerosis development, we proposed a novel strategy for the efficient delivery of rapamycin (RAPA) by targeting both the exposed subendothelial collagen and oxidized low-density lipoprotein (oxLDL) present in plaques. In response, we developed multifunctional peptide (MP) nanoparticles for targeted drug delivery. The ability of MP nanoparticles to load RAPA and target collagen/oxLDL was investigated through molecular dynamics simulations and in vitro experiments. The efficacy of MP nanoparticles in atherosclerosis treatment was assessed via in vivo experiments on ApoE−/− mice. Results indicate that MP nanoparticles have encapsulation and drug loading efficiencies for RAPA of 78.3 % and 43.9 %, respectively. By targeting collagen, MP nanoparticles create steric hindrance that inhibits 77.2 % of platelet adhesion. These nanoparticles can also target oxLDL, delivering RAPA into plaques and significantly reducing macrophage uptake of oxLDL. In vivo experiments showed that MP nanoparticles effectively targeted and accumulated in plaques. Treating mice with MP@RAPA nanoparticles for 10 weeks led to an 81.3 % reduction in the aortic vascular plaque area and decreased concentrations of MCP-1, hs-CRP, MMP-1, P-selectin, IL-1β, and IL-8 inflammatory factors, as well as the optical density of platelet-associated proteins (CD42, CD61, and PECAM-1). These results highlight the promising potential of MP nanoparticles for atherosclerotic disease treatment.
越来越多的证据支持靶向疗法在治疗动脉粥样硬化疾病方面的独特优势。鉴于动脉粥样硬化发展的复杂性,我们提出了一种新的策略,通过靶向斑块中暴露的内皮下胶原蛋白和氧化低密度脂蛋白(oxLDL)来高效递送雷帕霉素(RAPA)。为此,我们开发了用于靶向给药的多功能肽(MP)纳米颗粒。我们通过分子动力学模拟和体外实验研究了 MP 纳米颗粒负载 RAPA 和靶向胶原蛋白/oxLDL 的能力。通过对载脂蛋白E-/-小鼠进行体内实验,评估了MP纳米颗粒治疗动脉粥样硬化的功效。结果表明,MP 纳米颗粒对 RAPA 的包裹率和药物负载率分别为 78.3% 和 43.9%。通过靶向胶原蛋白,MP 纳米粒子可产生立体阻碍,抑制 77.2% 的血小板粘附。这些纳米粒子还能靶向氧化低密度脂蛋白,将 RAPA 送入斑块,并显著减少巨噬细胞对氧化低密度脂蛋白的吸收。体内实验表明,MP 纳米粒子能有效靶向斑块并在斑块中积聚。用MP@RAPA纳米粒子治疗小鼠10周后,主动脉血管斑块面积减少了81.3%,MCP-1、hs-CRP、MMP-1、P-选择素、IL-1β和IL-8等炎症因子的浓度以及血小板相关蛋白(CD42、CD61和PECAM-1)的光密度均有所下降。这些结果凸显了 MP 纳米粒子治疗动脉粥样硬化疾病的巨大潜力。
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引用次数: 0
Recent advances in liposomes and peptide-based therapeutics for glioblastoma treatment 治疗胶质母细胞瘤的脂质体和多肽疗法的最新进展。
IF 10.5 1区 医学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-10-30 DOI: 10.1016/j.jconrel.2024.10.037
M.-A. Jourdain, J. Eyer
In the context of glioblastoma treatment, the penetration of drugs is drastically limited by the blood-brain-barrier (BBB). Emerging therapies have focused on the field of therapeutic peptides for their excellent BBB targeting properties that promote a deep tumor penetration. Peptide-based strategies are also renowned for their abilities of driving cargo such as liposomal system allowing an active targeting of receptors overexpressed on GBM cells. This review provides a detailed description of the internalization mechanisms of specific GBM homing and penetrating peptides as well as the latest in vitro/in vivo studies of liposomes functionalized with them. The purpose of this review is to summarize a selection of promising pre-clinical results that demonstrate the advantages of this nanosystem, including an increase of tumor cell targeting, triggering drug accumulation and thus a strong antitumor effect. Aware of the early stage of these studies, many challenges need to be overcome to promote peptide-directed liposome at clinical level. In particular, the lack of suitable production, the difficulty to characterize the nanosystem and therapeutic competition leaded by antibodies.
在治疗胶质母细胞瘤方面,药物的渗透受到血脑屏障(BBB)的极大限制。新出现的疗法主要集中在治疗肽领域,因为它们具有良好的 BBB 靶向特性,能促进药物深入肿瘤。基于肽的治疗策略还因其驱动货物的能力而闻名,如脂质体系统可主动靶向肿瘤细胞上过度表达的受体。本综述详细介绍了特定 GBM 归巢肽和穿透肽的内化机制,以及使用这些肽功能化脂质体的最新体外/体内研究。本综述旨在总结一些有前景的临床前研究结果,这些结果证明了这种纳米系统的优势,包括增加肿瘤细胞靶向性、引发药物蓄积,从而产生强大的抗肿瘤效果。由于这些研究还处于早期阶段,要在临床上推广肽导向脂质体还需要克服许多挑战。特别是缺乏合适的生产、纳米系统难以表征以及抗体导致的治疗竞争。
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引用次数: 0
Drug conjugates crosslinked bioresponsive hydrogel for combination therapy of diabetic wound 用于糖尿病伤口综合治疗的药物共轭交联生物反应性水凝胶。
IF 10.5 1区 医学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-10-30 DOI: 10.1016/j.jconrel.2024.10.046
Manhui Zheng , Wenxiang Song , Peipei Huang , Yueping Huang , Hanxuan Lin , Miao Zhang , Huacheng He , Jiang Wu
Basic fibroblast growth factor (bFGF) has proved to be effective for wound healing, yet its effectiveness is extremely retarded in diabetic wounds due to the severe oxidative stress in wound beds. To solve this issue, herein a novel combination therapy of bFGF and N-acetylcysteine (NAC, antioxidant) was devised for improved diabetic wound repair. To avoid rapid loss of both drugs in the wound beds, a bioresponsive hydrogel (bFGF-HSPP-NAC) was engineered by incorporating bFGF and NAC into polymer-drug conjugates (HSPP) via thiol-disulfide exchange reactions. In response to oxidative stress (e.g., reactive oxygen species), the disulfide bonds (SS) within the hydrogel are broken into thiol groups (-S-H), thereby promoting hydrogel degradation and enabling controlled drug release. Initially, NAC is released to scavenge free radicals and ameliorate oxidative damage. Subsequently, bFGF is released to expedite tissue regeneration. This combinatorial strategy is tailored to the specific characteristics of the wound microenvironment at various stages of diabetic wound healing, thereby achieving therapeutic efficacy. The results indicate that the bFGF-HSPP-NAC hydrogel markedly enhances re-epithelialization, collagen deposition, hair follicle regeneration, and neovascularization. In conclusion, the bioresponsive bFGF-HSPP-NAC hydrogel demonstrates significant potential for application in combinatorial therapeutic approaches for diabetic wound healing.
碱性成纤维细胞生长因子(bFGF)已被证明能有效促进伤口愈合,但由于伤口床存在严重的氧化应激,它在糖尿病伤口中的疗效极差。为了解决这个问题,本文设计了一种新型的 bFGF 和 N-乙酰半胱氨酸(NAC,抗氧化剂)联合疗法,以改善糖尿病伤口的修复。为了避免两种药物在伤口床中快速流失,研究人员通过硫醇-二硫化物交换反应将 bFGF 和 NAC 加入聚合物-药物共轭物(HSPP)中,从而设计出一种生物反应性水凝胶(bFGF-HSPP-NAC)。在氧化应激(如活性氧)作用下,水凝胶中的二硫键(SS)会断裂成硫醇基团(-S-H),从而促进水凝胶降解并实现药物的可控释放。最初,NAC 被释放出来清除自由基,改善氧化损伤。随后,释放 bFGF 以加速组织再生。这种组合策略针对糖尿病伤口愈合不同阶段伤口微环境的具体特点,从而达到治疗效果。研究结果表明,bFGF-HSPP-NAC 水凝胶能明显促进伤口的再上皮化、胶原沉积、毛囊再生和新生血管形成。总之,生物反应性 bFGF-HSPP-NAC 水凝胶在糖尿病伤口愈合的组合治疗方法中具有巨大的应用潜力。
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引用次数: 0
A bifunctional nanocomplex with remineralizing and antibacterial activities to interrupt dental caries 一种具有再矿化和抗菌活性的双功能纳米复合物,可阻断龋齿。
IF 10.5 1区 医学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-10-30 DOI: 10.1016/j.jconrel.2024.10.041
Cheng Zhi , Xu Chen , Kaining Yu , Min Li , Fan Li , Yangyang Ye , Yanyun Pang , Ye Zhang , Xiangyu Zhang , Xu Zhang
Dental caries result from an imbalance between the demineralization and remineralization of dental hard tissues, primarily caused by biofilm accumulation. According to the theory of interrupting dental caries, effective anticaries materials and techniques should possess both remineralizing and antibacterial properties. However, current anticaries materials fail to mimic the process of amelogenesis to achieve remineralization while inhibiting the adhesion of cariogenic bacteria and the formation of biofilms. In this study, silk fibroin (SF) loaded with benzalkonium chloride (BZC) successfully formed an SF-BZC composite. This composite stabilized amorphous calcium phosphate (ACP), creating an ACP@SF-BZC dual-functional nanocomplex with both remineralizing and antibacterial properties. ACP@SF-BZC demonstrated significant anti-adhesion and biofilm inhibitory effects against Streptococcus mutans and Streptococcus sobrinus. Moreover, compared to fluoride, ACP@SF-BZC significantly enhanced the remineralization of demineralized enamel surfaces, forming a stable remineralized layer with improved mechanical properties, both in vitro and in vivo. In summary, the dual-function ACP@SF-BZC nanocomplex, with its remineralizing and antibacterial effects, offers a promising alternative for preventing and arresting enamel caries.
龋齿是牙齿硬组织脱矿和再矿化失衡的结果,主要是由生物膜堆积引起的。根据阻断龋齿的理论,有效的防龋材料和技术应同时具有再矿化和抗菌特性。然而,目前的抗龋齿材料无法复制髓质生成,而髓质生成对于再矿化和防止细菌粘附及生物膜形成至关重要。在这项研究中,蚕丝纤维素(SF)负载苯扎氯铵(BZC)成功地形成了 SF-BZC 复合材料。这种复合材料稳定了无定形磷酸钙(ACP),形成了具有再矿化和抗菌特性的 ACP@SF-BZC 双功能纳米复合物。ACP@SF-BZC 对变异链球菌和索布林链球菌具有显著的抗粘附和生物膜抑制作用。此外,与氟化物相比,ACP@SF-BZC 能显著增强脱矿珐琅质表面的再矿化,形成稳定的再矿化层,并改善体外和体内的机械性能。总之,具有再矿化和抗菌双重功效的 ACP@SF-BZC 纳米复合物为预防和阻止釉质龋提供了一种很有前景的替代方法。
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引用次数: 0
A single molecule carrier for ocular posterior segment diseases 治疗眼后节疾病的单分子载体
IF 10.8 1区 医学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-10-29 DOI: 10.1016/j.jconrel.2024.10.052
Xiao-Ling Zhang, Yu-Xin Yue, Yang Yang, An-Kang Ying, Rong Ma, Jie Chen, Fang-Yuan Chen, Xiao-Yun Hou, Yu-Chen Pan, Da-Zhuang Ren, Tao Yang, Zhi-Qing Li, Dong-Sheng Guo
Eye drops are envisaged as the most promising non-invasive formulation for the treatment of the ocular posterior segment diseases, while it is hindered by a series of complex ocular barriers, both static and dynamic in nature. In this context, we propose a single molecule nanomedicine based on host-guest chemistry to achieve highly efficient drug delivery targeted to ocular posterior segment. Sulfonated azocalix[4]arene (SAC4A) serves as the single molecule carrier, owing the multiple features of small size (24.0 Å in length, 21.2 Å in width, 14.8 Å in height with a Van der Waals volume of 930 Å3), negative charge, hydrophilicity, loading universality and hypoxia-triggered release. As a proof-of-concept, an eye drop formed by the complexation of SAC4A with sunitinib (SUN) is prepared to treat wet age-related macular degeneration (wAMD). SAC4A successfully transports SUN to the ocular posterior segment (the amount of SUN reaching the retinal-choroid tissue in the SUN@SAC4A group was 2.47 times larger than that in the SUN group at 30 min), significantly enhancing its anti-choroidal neoangiogenesis effect of SUN to wAMD, which played a key role in the treatment. We believe that the single molecule nanomedicine paradigm is highly amenable for treating various ocular posterior segment diseases in the future.
滴眼液被认为是治疗眼后节疾病最有前景的非侵入性制剂,但它受到一系列复杂的眼部静态和动态屏障的阻碍。在此背景下,我们提出了一种基于宿主-宿主化学的单分子纳米药物,以实现针对眼后节的高效给药。磺化偶氮[4]炔(SAC4A)具有体积小(长 24.0 Å、宽 21.2 Å、高 14.8 Å,范德华体积为 930 Å3)、带负电荷、亲水性强、装载普遍性和缺氧触发释放等多种特性,因此可作为单分子载体。作为概念验证,我们制备了一种由 SAC4A 与舒尼替尼 (SUN) 复合物形成的眼药水,用于治疗湿性年龄相关性黄斑变性(wAMD)。SAC4A 成功地将 SUN 转运到眼球后段(30 分钟后,SUN@SAC4A 组到达视网膜-脉络膜组织的 SUN 量是 SUN 组的 2.47 倍),显著增强了 SUN 对湿性老年性黄斑变性的抗脉络膜新生血管生成作用,在治疗中发挥了关键作用。我们相信,单分子纳米药物范式在未来治疗各种眼后节疾病方面具有很大的可行性。
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引用次数: 0
Optimizing lipid nanoparticles for fetal gene delivery in vitro, ex vivo, and aided with machine learning 在体外、体内和机器学习的辅助下,优化用于胎儿基因递送的脂质纳米颗粒。
IF 10.5 1区 医学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-10-28 DOI: 10.1016/j.jconrel.2024.10.047
Amr Abostait , Mahmoud Abdelkarim , Zeqing Bao , Yuichiro Miyake , Wai Hei Tse , Caterina Di Ciano-Oliveir , Tina Buerki-Thurnherr , Christine Allen , Richard Keijzer , Hagar I. Labouta
There is a clinical need to develop lipid nanoparticles (LNPs) to deliver congenital therapies to the fetus during pregnancy. The aim of these therapies is to restore normal fetal development and prevent irreversible conditions after birth. As a first step, LNPs need to be optimized for transplacental transport, safety on the placental barrier and fetal organs and transfection efficiency. We developed and characterized a library of LNPs of varying compositions and used machine learning (ML) models to delineate the determinants of LNP size and zeta potential. Utilizing different in vitro placental models with the help of a Random Forest algorithm, we could identify the top features driving percentage LNP transport and kinetics at 24 h, out of a total of 18 input features represented by 41 LNP formulations and 48 different transport experiments. We further evaluated the LNPs for safety, placental cell uptake, transfection efficiency in placental trophoblasts and fetal lung fibroblasts. To ensure the integrity of the LNPs following transplacental transport, we screened LNPs for transport and transfection using a high-throughput integrated transport-transfection in vitro model. Finally, we assessed toxicity of the LNPs in a tracheal occlusion fetal lung explant model. LNPs showed little to no toxicity to fetal and placental cells. Immunoglobin G (IgG) orientation on the surface of LNPs, PEGylated lipids, and ionizable lipids had significant effects on placental transport. The Random Forest algorithm identified the top features driving LNPs placental transport percentage and kinetics. Zeta potential emerged in the top driving features. Building on the ML model results, we developed new LNP formulations to further optimize the transport leading to 622 % increase in transport at 24 h versus control LNP formulation. To induce preferential siRNA transfection of fetal lung, we further optimized cationic lipid percentage and the lipid-to-siRNA ratio. Studying LNPs in an integrated placental and fetal lung fibroblasts model showed a strong correlation between zeta potential and fetal lung transfection. Finally, we assessed the toxicity of LNPs in a tracheal occlusion lung explant model. The optimized formulations appeared to be safe on ex vivo fetal lungs as indicated by insignificant changes in apoptosis (Caspase-3) and proliferation (Ki67) markers. In conclusion, we have optimized an LNP formulation that is safe, with high transplacental transport and preferential transfection in fetal lung cells. Our research findings represent an important step toward establishing the safety and effectiveness of LNPs for gene delivery to the fetal organs.
临床上需要开发脂质纳米粒子(LNPs),以便在怀孕期间为胎儿提供先天性疗法。这些疗法的目的是恢复胎儿的正常发育,防止出生后出现不可逆转的情况。作为第一步,LNPs 需要在经胎盘运输、对胎盘屏障和胎儿器官的安全性以及转染效率方面进行优化。我们开发了一个不同成分的 LNPs 库并对其进行了表征,同时使用机器学习(ML)模型来确定 LNP 尺寸和 zeta 电位的决定因素。在随机森林算法的帮助下,我们利用不同的体外胎盘模型,从 41 种 LNP 配方和 48 种不同转运实验所代表的 18 种输入特征中,找出了驱动 24 小时内 LNP 转运和动力学百分比的首要特征。我们进一步评估了 LNP 的安全性、胎盘细胞摄取率、胎盘滋养细胞和胎肺成纤维细胞的转染效率。为确保 LNPs 经胎盘转运后的完整性,我们使用高通量转运-转染综合体外模型对 LNPs 的转运和转染进行了筛选。最后,我们在气管闭塞胎肺移植模型中评估了 LNPs 的毒性。LNPs 对胎儿和胎盘细胞几乎没有毒性。LNPs表面的免疫球蛋白G(IgG)取向、PEG化脂类和可电离脂类对胎盘转运有显著影响。随机森林算法确定了驱动 LNPs 胎盘转运百分比和动力学的首要特征。Zeta电位是最主要的驱动特征。根据 ML 模型的结果,我们开发了新的 LNP 配方,进一步优化了转运,使 24 小时后的转运率与对照 LNP 配方相比提高了 622%。为了诱导 siRNA 优先转染胎肺,我们进一步优化了阳离子脂质的比例和脂质与 siRNA 的比例。在胎盘和胎肺成纤维细胞综合模型中对 LNPs 的研究表明,zeta 电位与胎肺转染之间存在很强的相关性。最后,我们在气管闭塞肺移植模型中评估了 LNPs 的毒性。凋亡(Caspase-3)和增殖(Ki67)标志物的微小变化表明,优化后的制剂似乎对体内胎肺是安全的。总之,我们优化了一种 LNP 配方,这种配方安全、经胎盘转运率高,并能优先转染胎儿肺细胞。我们的研究成果标志着我们在确定 LNPs 用于胎儿器官基因递送的安全性和有效性方面迈出了重要一步。
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引用次数: 0
Allan Hoffman - My friend. 艾伦-霍夫曼--我的朋友
IF 10.5 1区 医学 Q1 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2024-10-28 DOI: 10.1016/j.jconrel.2024.10.022
James M Anderson
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引用次数: 0
期刊
Journal of Controlled Release
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