CD163 overexpression using a macrophage-directed gene therapy approach improves wound healing in ex vivo and in vivo human skin models

Large tissue damage or wounds cause serious comorbidities and represent a major burden for patients, families, and health systems. Due to the pivotal role of immune cells in the proper resolution of inflammation and tissue repair, we focus our current study on the interaction of macrophages with skin cells, and specifically on the effects of CD163 gene induction in macrophages in wound healing. We hypothesize that the over-expression of the scavenger receptor gene CD163 in human macrophages would result in a more efficient wound healing process. Using 3D human wounded skin organotypic tissues, we observed that CD163 overexpression in THP-1 and human primary macrophages induced a more efficient re-epithelization when compared to control cells. Using human primary skin cells and an in vitro scratch assay we observed that CD163 overexpression in THP-1 macrophages promoted a more rapid and efficient wound healing process through a unique interaction with fibroblasts. The addition of CD163-blocking antibody, but not isotype control, blocked the efficient wound healing process induced by CD163 overexpression in macrophages. We found that the co-culture of skin cells and CD163 overexpressing macrophages reduced monocyte chemoattractant protein (MCP)-1 and enhanced tumor growth factor (TGF)-α, without altering interleukin (IL)-6 or TGF-β. Our findings show that CD163 induces a more efficient wound healing and seems to promote a wound milieu with a pro-resolution molecular profile. Our studies set the foundation to study this approach in in vivo clinically relevant settings to test its effects in wound healing processes such as acute major injuries, large surgeries, or chronic ulcers.     

纳米水平分子成像与诊疗一体化研究进展与挑战

分子成像能以非侵入性的方式重现活体细胞的生理功能和生物学过程,提高疾病的早期和特异性诊断水平。纳米颗粒/材料具有物理性质可控性高、易于表面修饰、血液循环时间长和可功能化等优点,在疾病诊断与治疗中显示出巨大潜力。但如何阐明纳米材料多功能间的内在联系、解决其代谢及安全性等关键机制难题、实现纳米颗粒/材料多功能性到临床多功能...     

女性盆底重建中纳米材料的研究现状

女性盆底功能障碍性疾病（pelvic floor dysfunction,PFD）是指盆底支持结构缺陷、损伤及功能障碍造成的疾患,包括尿失禁（urinary incontinence,UI）、盆腔器官脱垂（pelvic organ prolapse,POP）、粪失禁（fecal incontinence,FI）等。PFD发病机制尚不明确,治疗PFD的主要目标是恢复盆腔器官的解剖和功能,手术是PFD最主要的治疗方法。当前盆底重建手术中应用的聚丙烯合成材料在降低术后复发率的同时,也存在排异、侵蚀等并发症,学者们仍然在探索组织相容性更好的盆底重建材料。纳米材料直径通常介于数十纳米至数微米之间,具有极大的比表面积和高孔隙率,高度类似细胞外基质,利于细胞的黏附、分化和增殖,在女性盆底重建领域有巨大的应用前景。综述纳米材料的分类、特性、制备技术及其在女性盆底重建中的研究现状。     

内镜超声引导下纳米炭标记法对直肠癌腹腔镜手术的辅助价值

目的:探讨内镜超声引导下纳米炭标记法在直肠癌腹腔镜手术前定位的应用价值。方法:选取2018年4月—2019年4月联勤保障部队第九〇〇医院经活检病理诊断为直肠癌拟行腹腔镜手术的患者60例,根据随机数字表法分为内镜超声标记组（A组）、结肠镜标记组（B组）与无标记的对照组（C组）。记录肠镜下标记时肠腔内染料漏渗率、不良反应情...     

Pure drug nano-assemblies: A facile carrier-free nanoplatform for efficient cancer therapy

Nanoparticulate drug delivery systems (Nano-DDSs) have emerged as possible solution to the obstacles of anticancer drug delivery. However, the clinical outcomes and translation are restricted by several drawbacks, such as low drug loading, premature drug leakage and carrier-related toxicity. Recently, pure drug nano-assemblies (PDNAs), fabricated by the self-assembly or co-assembly of pure drug molecules, have attracted considerable attention. Their facile and reproducible preparation technique helps to remove the bottleneck of nanomedicines including quality control, scale-up production and clinical translation. Acting as both carriers and cargos, the carrier-free PDNAs have an ultra-high or even 100% drug loading. In addition, combination therapies based on PDNAs could possibly address the most intractable problems in cancer treatment, such as tumor metastasis and drug resistance. In the present review, the latest development of PDNAs for cancer treatment is overviewed. First, PDNAs are classified according to the composition of drug molecules, and the assembly mechanisms are discussed. Furthermore, the co-delivery of PDNAs for combination therapies is summarized, with special focus on the improvement of therapeutic outcomes. Finally, future prospects and challenges of PDNAs for efficient cancer therapy are spotlighted.