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Utilizing Bacteria-Derived Components for Cancer Immunotherapy 利用细菌衍生成分进行癌症免疫治疗
Pub Date : 1900-01-01 DOI: 10.15212/bioi-2022-0022
Chengxiao Zhang, Y. Mu, Ye Zhuo, Taihua Li, F. Jin, Chun-Zhin Jin, Hyung-Gwan Lee, Long Jin
Bacteria-related cancer immunotherapy, because of its mechanisms and useful applications in the induction of anti-tumor immunity, has gained substantial attention in recent decades. Bacteria can enable targeting of tumors, and specifically can colonize the core tumor area. Because they contain many pathogen-associated molecular patterns—which efficiently stimulate immune cells, even within microenvironments that suppress anti-tumor immunity—bacteria boost immunological recognition leading to the destruction of malignant cells. This Editorial highlights various bacteria with immunotherapeutic effects and their by-products used as immunotherapeutics.
近几十年来,细菌相关的癌症免疫治疗由于其机制和在诱导抗肿瘤免疫方面的有用应用而受到了广泛的关注。细菌可以靶向肿瘤,并且可以在肿瘤核心区域定殖。因为它们含有许多与病原体相关的分子模式,即使在抑制抗肿瘤免疫的微环境中,细菌也能有效地刺激免疫细胞,从而增强免疫识别,从而破坏恶性细胞。这篇社论重点介绍了具有免疫治疗作用的各种细菌及其用作免疫治疗药物的副产品。
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引用次数: 1
The Integration of Reactive Oxygen Species Generation and Prodrug Activation for Cancer Therapy 活性氧生成与药物前活化在癌症治疗中的整合
Pub Date : 1900-01-01 DOI: 10.15212/bioi-2021-0011
Xiaoen Shi, Xu Zhang, Xinlu Zhang, Hai-bing Guo, Sheng Wang
The combination of chemotherapeutic drugs and reactive oxygen species (ROS) can improve cancer treatment outcome. Many ROS-generation strategies can specifically consume tumor-inherent oxygen and generate ROS, resulting in amplified ROS level and aggravated hypoxia. Therefore, the ROS generation strategy can integrate with prodrug activation strategy to realize synergetic therapy. In recent years, stimuli-responsive nanomedicines have been developed to realize the integration of ROS generation and prodrug activation. Triggered by a stimulus, nanomedicines can generate ROS at the tumor site, which can further activate the release of active drugs. In this review, we will summarize the latest progress of these nanomedicines and discuss the perspectives and challenges.
化疗药物与活性氧(reactive oxygen species, ROS)联合使用可以改善肿瘤的治疗效果。许多ROS生成策略可特异性消耗肿瘤固有氧产生ROS,导致ROS水平升高,缺氧加重。因此,ROS生成策略可与前药激活策略相结合,实现协同治疗。近年来,刺激反应型纳米药物被开发出来,以实现ROS生成和药前激活的整合。纳米药物在刺激的作用下,可以在肿瘤部位产生ROS,进一步激活活性药物的释放。本文将对纳米药物的最新研究进展进行综述,并对其发展前景和面临的挑战进行讨论。
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引用次数: 0
First experiments with carbon black pigment dispersion acting as a Janus ultrasound contrast agent 首先用炭黑颜料分散体作为Janus超声造影剂进行实验
Pub Date : 1900-01-01 DOI: 10.15212/bioi-2023-0004
Jean de Bruin Jordaan, Ken J. Nixon, Craig S. Carlson, M. Postema
Background: Theranostic ultrasound contrast agents comprise a therapeutic component whose controlled release is triggered by an ultrasound pulse. However, once the therapeutic component has been released from an ultrasound contrast agent microbubble, its intended uptake cannot be monitored, as its acoustically active host has been destroyed. Acoustic Janus particles, whose hydrophobic and hydrophilic properties depend on the external acoustic regime, are of potential use as contrast agents and drug-delivery tracers. The purpose of this study was to evaluate the hypothesis that submicron particles with Janus properties may act as ultrasound contrast agents whose hydrophobicity changes over time.Methods: Fifty samples of carbon black were subjected to 5-minute sonication with pulses with a center frequency of 10 MHz and a 1% duty cycle, after which the optical absorption coefficients were measured in n-octanol and water. These coefficients were compared with those of unsonicated samples.Results: Our preliminary results show that the difference between the linear absorption coefficients of sonicated and unsonicated samples was Δα = 80 ± 13 m−1 immediately after sonication, indicating that the carbon black particles were less hydrophobic after sonication than prior to it. Forty-eight hours after sonication, the difference in linear optical absorption coefficients had lessened to Δα = 16 ± 9 m−1, indicating that the carbon black particles had become more hydrophobic over time, but not equal to the hydrophobicity situation prior to sonication.Conclusion: The experiments confirmed that submicron carbon black particles have acoustic Janus properties.
背景:治疗性超声造影剂包括一种治疗成分,其受控释放由超声脉冲触发。然而,一旦治疗成分从超声造影剂微泡中释放出来,它的预期摄取就无法监测,因为它的声学活性宿主已经被破坏了。声学Janus粒子的疏水性和亲水性取决于外部声学状态,因此具有作为造影剂和药物传递示踪剂的潜在用途。本研究的目的是评估具有Janus特性的亚微米颗粒可能作为超声造影剂的假设,其疏水性随时间而变化。方法:对50个炭黑样品进行中心频率为10 MHz、占空比为1%的脉冲超声处理5分钟后,测定其在正辛醇和水中的光学吸收系数。将这些系数与未超声样品的系数进行了比较。结果:我们的初步结果表明,经过超声处理的炭黑样品与未经过超声处理的样品的线性吸收系数的差值为Δα = 80±13 m−1,表明经过超声处理的炭黑颗粒的疏水性比处理前有所降低。超声处理48小时后,线性光学吸收系数的差值减小到Δα = 16±9 m−1,表明炭黑颗粒随着时间的推移变得更加疏水,但不等于超声处理前的疏水情况。结论:实验证实了亚微米炭黑颗粒具有声学双面神特性。
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引用次数: 0
Classification and Medical Applications of Biomaterials–A Mini Review 生物材料分类与医学应用综述
Pub Date : 1900-01-01 DOI: 10.15212/bioi-2022-0009
Eric Tzyy Jiann Chong, Jun Wei Ng, P. Lee
Biomaterials are natural, synthetic, or hybrid materials, which are used in medical devices or implants that are placed in contact with the human biological system to compensate for or restore diminished functions of the body. The field of biomaterials has rapidly developed to meet the ever-expanding needs in healthcare and medicine practices. Advancements in science and technology have enabled the fabrication and reengineering of biomaterials into useful medical devices or implants, such as heart valves, bone plates, hip joints, and cardiac pacemakers. Because biomaterials are placed in continuous close contact with the recipient’s body fluids or tissues, the classification of available biomaterials is crucial for selecting safer and highly biocompatible materials. This review focuses on biomaterial classification, namely bioceramic, polymeric, and metallic biomaterials. Their medical applications, advantages, and disadvantages are discussed. Current trends in biomaterials involved in disease treatments, such as controlled drug delivery and cancer therapy, are additionally explored.
生物材料是天然、合成或混合材料,用于与人体生物系统接触的医疗设备或植入物,以补偿或恢复身体功能的减弱。生物材料领域迅速发展,以满足医疗保健和医学实践中不断扩大的需求。科学技术的进步使生物材料的制造和再造成为有用的医疗设备或植入物,如心脏瓣膜、骨板、髋关节和心脏起搏器。由于生物材料与受体体液或组织持续密切接触,因此对可用生物材料进行分类对于选择更安全和高度生物相容性的材料至关重要。本文综述了生物材料的分类,即生物陶瓷、聚合物和金属生物材料。讨论了它们的医学应用、优缺点。目前的趋势,生物材料涉及疾病治疗,如控制药物输送和癌症治疗,另外探讨。
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引用次数: 2
Integration in Bioscience: Dynamic, Inclusive, and Full of Possibility 生物科学的融合:动态、包容和充满可能性
Pub Date : 1900-01-01 DOI: 10.15212/bioi-2023-0002
Zhiyi Chen
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引用次数: 0
In vivo Iron-Based Coordination Assembly for Disease Diagnosis and Treatment 用于疾病诊断和治疗的体内铁基配位组装
Pub Date : 1900-01-01 DOI: 10.15212/bioi-2022-0016
Gan Lin, Huirong Lin, Zhen Yuan, Gang Liu
Advances in in vivo iron-based coordination assembly have enabled the simultaneous detection and treatment of iron-overload disorders. Specific interactions between local FeIII and organic ligands (e.g., indocyanine green and lecithin) facilitate magnetic resonance imaging with enhanced sensitivity and photoacoustic imaging with high contrast, thus overcoming the longstanding limitations of traditional iron quantification approaches. Moreover, enhanced iron depletion can also be achieved in murine genetic models of iron-overload disorders. These advances provide great promise in interdisciplinary leveraging of biology, medicine and materials science to design nanomedicines for addressing unmet clinical needs.
体内铁基配位组装的进展使铁超载疾病的同时检测和治疗成为可能。局部FeIII与有机配体(如吲哚菁绿和磷脂)之间的特定相互作用有助于增强磁共振成像的灵敏度和光声成像的高对比度,从而克服了传统铁定量方法的长期局限性。此外,在铁超载疾病的小鼠遗传模型中也可以实现铁消耗的增强。这些进展为跨学科利用生物学、医学和材料科学来设计纳米药物以解决未满足的临床需求提供了巨大的希望。
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引用次数: 0
Morphological Evaluation of Mitral Valve Based on Three-dimensional Printing Models: Potential Implication for Mitral Valve Repair 基于三维打印模型的二尖瓣形态学评价:对二尖瓣修复的潜在意义
Pub Date : 1900-01-01 DOI: 10.15212/bioi-2021-0017
Yuan-ting Yang, Hao Wang, Hong-ning Song, Yugang Hu, Qincheng Gong, Ye Xiong, Junbi Liu, Wei Ren, Qing Zhou
Objective: This study aimed to analyze the morphological characteristics of rheumatic (RMVD) and degenerative mitral valve diseases (DMVD) based on three-dimensional (3D) printing model before and after surgery and to explore the potential implication of the 3D printing model for mitral valve (MV) repair.Methods: 3D transesophageal echocardiography (TEE) data of the MV were acquired in 45 subjects (15 with RMVD, 15 with DMVD, and 15 with normal MV anatomy). 3D printing models of the MV were constructed by creating molds to be printed with water-soluble polyvinyl alcohol, then filled with room temperature vulcanizing silicone. The parameters of the annulus and leaflet of the MV were acquired and analyzed using the 3D printing model. Mitral valve repair was simulated on 3D printing models of 10 subjects and compared with the actual operation performed on patients. The effects of surgery were assessed by evaluating the changes in coaptation length (CL) and the annular height to commissural width ratio (AHCWR) before and after MV repairs. The correlations of the grade of mitral regurgitation with CL and AHCWR were analyzed.Results: 3D silicone MV models were all successfully constructed based on 3D TEE data. Compared with the normal groups, the mitral annulus size in the RMVD groups showed no significant differences. In contrast, mitral annulus in DMVD groups was dilated and flattened with diameters of anteroposterior, anterolateral-posteromedial, commissural width, annular circumferences, and area increased. Mitral repair was successfully simulated on 10 models with significant increase in leaflet coaptation area both in vivo and in vitro. Good agreement was observed in CL and AHCWR after surgery in the 3D printing model compared with real surgery on the patient valve. The grade of mitral regurgitation correlated inversely with CL (r = –0.87, P < 0.01) and AHCWR (r = –0.79, P < 0.01). Mitral valve repair was performed twice in one model to assess which provided a better outcome.Conclusions: 3D printing models of the MV based on 3D TEE data could be used in morphological analysis of the MV before and after surgery in RMVD and DMVD. Surgery simulation on 3D printing models could provide valuable information concerning morphological changes after surgery, with are closely associated with clinical outcomes.
目的:通过三维(3D)打印模型分析风湿性(RMVD)和退行性二尖瓣疾病(DMVD)手术前后的形态学特征,探讨3D打印模型在二尖瓣(MV)修复中的潜在意义。方法:对45例患者(RMVD 15例,DMVD 15例,MV解剖正常15例)的经食管超声心动图(TEE)数据进行分析。通过用水溶性聚乙烯醇制作打印模具,然后填充室温硫化硅胶,构建了MV的3D打印模型。利用3D打印模型获取并分析了中压环和小叶的参数。采用3D打印模型模拟10例受试者的二尖瓣修复,并与患者的实际手术进行比较。通过观察中压修复前后吻合长度(CL)和环高/节宽比(AHCWR)的变化来评价手术效果。分析二尖瓣反流分级与CL、AHCWR的相关性。结果:基于三维TEE数据,均成功构建了三维硅胶MV模型。与正常组相比,RMVD组二尖瓣环大小无显著差异。相反,DMVD组二尖瓣环扩张、变平,前后径、前外侧-后内侧径、联合宽度、环周长和面积增加。在10个模型上成功模拟了二尖瓣修复,体内和体外的小叶覆盖面积均显著增加。与患者瓣膜的实际手术相比,3D打印模型术后CL和AHCWR的一致性很好。二尖瓣返流分级与CL (r = -0.87, P < 0.01)、AHCWR (r = -0.79, P < 0.01)呈负相关。在一个模型中进行两次二尖瓣修复,以评估哪一种修复效果更好。结论:基于3D TEE数据的3D打印中压模型可用于RMVD和DMVD手术前后中压形态学分析。在3D打印模型上进行手术模拟,可以提供有关手术后形态学变化的有价值的信息,与临床结果密切相关。
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引用次数: 2
CRISPR/Cas-based Diagnostics and Gene Therapy 基于CRISPR/ cas的诊断和基因治疗
Pub Date : 1900-01-01 DOI: 10.15212/bioi-2020-0048
Qiu Meiyu, Liping Pei
Clustered regularly interspaced short palindromic repeats (CRISPR) technology, an easy, rapid, cost-effective, and precise gene-editing technique, has revolutionized diagnostics and gene therapy. Fast and accurate diagnosis of diseases is essential for point-of-care-testing (POCT) and specialized medical institutes. The CRISPR-associated (Cas) proteins system shed light on the new diagnostics methods at point-of-care (POC) owning to its advantages. In addition, CRISPR/Cas-based gene-editing technology has led to various breakthroughs in gene therapy. It has been employed in clinical trials for a variety of untreatable diseases, including cancer, blood disorders, and other syndromes. Currently, the clinical application of CRISPR/Cas has been mainly focused on ex vivo therapies. Recently, tremendous efforts have been made in the development of ex vivo gene therapy based on CRISPR-Cas9. Despite these efforts, in vivo CRISPR/Cas gene therapy is only in its initial stage. Here, we review the milestones of CRISPR/Cas technologies that advanced the field of diagnostics and gene therapy. We also highlight the recent advances of diagnostics and gene therapy based on CRISPR/Cas technology. In the last section, we discuss the strength and significant challenges of the CRISPR/Cas technology for its future clinical usage in diagnosis and gene therapy.
聚类规则间隔短回文重复序列(CRISPR)技术是一种简单、快速、经济、精确的基因编辑技术,已经彻底改变了诊断和基因治疗。快速、准确的疾病诊断对于即时检测(POCT)和专业医疗机构至关重要。crispr相关(Cas)蛋白系统以其优势揭示了在护理点(POC)的新诊断方法。此外,基于CRISPR/ cas的基因编辑技术也带来了基因治疗方面的各种突破。它已被用于临床试验,治疗各种不治之症,包括癌症、血液疾病和其他综合症。目前,CRISPR/Cas的临床应用主要集中在体外治疗。近年来,基于CRISPR-Cas9的体外基因治疗已经取得了巨大的进展。尽管做出了这些努力,体内CRISPR/Cas基因治疗仍处于初级阶段。在这里,我们回顾了CRISPR/Cas技术在诊断和基因治疗领域的里程碑。我们还重点介绍了基于CRISPR/Cas技术的诊断和基因治疗的最新进展。在最后一节中,我们讨论了CRISPR/Cas技术在诊断和基因治疗方面未来临床应用的优势和重大挑战。
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引用次数: 3
Voice series: Interview with Dr. Doris Di, University of Hawaii at Manoa; frontier in COVID-19 detection from wastewater treatment 声音系列:采访夏威夷大学马诺阿分校的 Doris Di 博士;从废水处理中检测 COVID-19 的前沿技术
Pub Date : 1900-01-01 DOI: 10.15212/bioi-2022-0012
Phei Er Saw
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引用次数: 1
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