NbS

NBS
  • 文章类型: Journal Article
    最大限度地提高癌症治疗效果和预测患者预后需要战略性地使用靶向治疗。再加上恶性肿瘤的快速精确检测。气体系统作为产生纳米气泡(NBs)的适应性平台的利用已经引起了人们的极大关注,其中涉及将通常用于成像的造影剂与药物相结合,以不同的方式对每位患者进行协同诊断和治疗。这篇综述专门研究了氧气NBs平台作为肿瘤学领域的治疗治疗武器的利用。我们彻底检查了影响NBs制剂有效性的关键因素以及这些治疗方法的后果。这篇综述广泛考察了构图方案的最新进展,临床前阶段的先进发展,以及NB领域的其他开创性发明。此外,这篇评论对乐观的未来可能性进行了彻底的审查,解决改善和纳入广泛接受的治疗实践的前瞻性方法。当我们探索不断变化的癌症治疗领域时,氧NBs的掺入似乎是一个有希望的发展,为精准医学提供新的机会,标志着癌症研究和治疗的革命性时代。
    Maximizing treatment efficacy and forecasting patient prognosis in cancer necessitates the strategic use of targeted therapy, coupled with the prompt precise detection of malignant tumors. Theutilizationof gaseous systems as an adaptable platform for creating nanobubbles (NBs) has garnered significant attention as theranostics, which involve combining contrast chemicals typically used for imaging with pharmaceuticals to diagnose and treattumorssynergistically in apersonalizedmanner for each patient. This review specifically examines the utilization of oxygen NBsplatforms as a theranostic weapon in the field of oncology. We thoroughly examine the key factors that impact the effectiveness of NBs preparations and the consequences of these treatment methods. This review extensively examines recent advancements in composition schemes, advanced developments in pre-clinical phases, and other groundbreaking inventions in the area of NBs. Moreover, this review offers a thorough examination of the optimistic future possibilities, addressing prospective methods for improvement and incorporation into widely accepted therapeutic practices. As we explore the ever-changing field of cancer theranostics, the incorporation of oxygen NBs appears as a promising development, providing new opportunities for precision medicine and marking a revolutionary age in cancer research and therapy.
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  • 文章类型: Journal Article
    本文考察了中国东北国家林区(NNFR)的社会生态复原力,关注气候变化对森林管理和碳固存的影响。它对天然林保护计划(NFPP)和相关的伐木禁令政策进行了严格的评估,认识到它们对森林保护的关键贡献,但也指出了一刀切方法的缺点。整合泛政府理论,该研究提出了可持续管理实践,使生态动态与社会需求保持一致,强调基于自然的解决方案。总体目标是增强NNFR森林的长期复原力并增强其固碳潜力。它旨在利用NNFR的经验教训为全球环境战略提供信息,倡导确保生态可持续性和社区繁荣的综合方法。这种方法旨在为应对环境挑战提供全面有效的战略,确保生态完整性和社区福祉。
    This paper examines the socio-ecological resilience within China\'s Northeast National Forest Region (NNFR), focusing on the implications of climate change for forest management and carbon sequestration. It offers a critical assessment of the Natural Forest Protection Program (NFPP) and the associated logging ban policy, recognizing their pivotal contributions to forest conservation but also identifying the shortcomings of a one-size-fits-all approach. Integrating panarchy theory, the study proposes sustainable management practices that align ecological dynamics with societal needs, emphasizing nature-based solutions. The overarching aim is to bolster the long-term resilience and enhance the carbon sequestration potential of the NNFR\'s forests. It aims to inform global environmental strategy with lessons from the NNFR, advocating for integrated approaches that ensure both ecological sustainability and community prosperity. This approach seeks to provide a comprehensive and effective strategy for addressing environmental challenges, ensuring both ecological integrity and community well-being.
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  • 文章类型: Journal Article
    背景:先天性代谢错误(IEM)的发生率因国家和地区而异。目前,在中国东部沿海地区,没有使用新生儿筛查(NBS)进行IEM的研究。我们旨在估计IEM的发病率和遗传变异,并了解IEM引起的疾病谱及其变异。
    方法:回顾性回顾了2016年至2021年通过串联质谱(MS/MS)进行的NBS。在出生后72小时从所有新生儿收集脚跟血。进行靶向大规模平行测序用于遗传分析。
    结果:在245,194名新生儿中,95人被诊断为IEM,观察到的总发病率为-IEM:1/2581;氨基酸代谢紊乱:1/4715;有机酸代谢紊乱:1/11676;脂肪酸代谢紊乱:1/11145.不同IEM的发生率在1/245194至1/6452的范围内。苯丙酮尿症(PKU,1/7211)是最常见的IEM,其次是甲基丙二酸血症(MMA,1/27244),短链酰基辅酶A脱氢酶缺乏症(SCADD,1/30649),和citrin缺乏症(CD,1/35028)。对于遗传变异,发现的常见热点变异是PKU的PAH基因:c.728G>A,c.442-1G>A,c.611A>G,c.721C>T;非经典PKU的PTS基因:c.259C>T;MMACHC基因为MMA:c.658_660delAAG,c.609G>A;MMA的MMUT基因:c.1663G>A;SCADD的ACADS基因:c.1031A>G和c.1130C>T;CD的SLC25A13基因:c.1638_1660dup,c.852_855del。
    结论:本研究显示了中国东部沿海地区IEM的疾病和不同范围。通过MS/MS结合大规模并行测序实施用于IEM的NBS可以为NBS检测IEM提供改进的计划。
    The incidence of inborn errors of metabolism (IEM) varies across countries and areas. Currently, there are no studies on IEM using newborn screening (NBS) in eastern coastal areas of China. We aimed to estimate the incidence and genetic variants of IEM and understand the spectrum of diseases caused by IEM and variants among them in this area.
    The NBS performed by tandem mass spectrometry (MS/MS) from 2016 to 2021 was retrospectively reviewed. Heel blood was collected from all newborns 72 h after birth. Targeted massively parallel sequencing was performed for genetic analysis.
    Among 245,194 newborns, 95 were diagnosed with IEM, the overall incidence observed was-IEM: 1/2581; amino acid metabolism disorder: 1/4715; organic acid metabolism disorder: 1/11676; and fatty acid metabolism disorder: 1/11145. The incidence of different IEM was in the range of 1/245194 to 1/6452. Phenylketonuria (PKU, 1/7211) was the most common IEM, followed by methylmalonic acidemia (MMA, 1/27244), short-chain acyl-CoA dehydrogenase deficiency (SCADD, 1/30649), and citrin deficiency (CD, 1/35028). For genetic variants, the common hotspot variants found were-PAH gene for PKU: c.728G > A, c.442-1G > A, c.611A > G, c.721C > T; PTS gene for non-classical PKU: c.259C > T; MMACHC gene for MMA: c.658_660delAAG, c.609G > A; MMUT gene for MMA: c.1663G > A; ACADS gene for SCADD: c.1031A > G and c.1130C > T; and SLC25A13 gene for CD: c.1638_1660dup, c.852_855del.
    This study displayed the diseases and varied spectrum of IEM in eastern coastal areas of China. Implementing NBS for IEM by MS/MS combined with massively parallel sequencing can offer an improved plan for NBS to detect IEM.
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  • 文章类型: Journal Article
    常见的杂草稻植物是现代育种计划的重要遗传资源,因为它们是水稻品种的近亲,并且其基因组包含优良基因。确定WRKY和核苷酸结合位点(NBS)抗性相关基因的效用和拷贝数可能有助于阐明其变异模式并导致作物改良。在这项研究中,在全基因组水平上检查了杂草稻品系LM8。为了鉴定LM8所属的水稻亚群,利用180个栽培稻和23个杂草稻品种的单核苷酸多态性(SNPs)构建系统发育树,并进行主成分分析和结构分析。结果表明,具有粳稻(GJ)和in稻(XI)混合物成分的LM8属于GJ混合物(GJ-adm),其60%以上的遗传背景来自XI-2(22.98%),GJ-热带(22.86%),和GJ-亚热带(17.76%)。不到9%的遗传背景来自杂草稻。我们的结果还表明LM8可能起源于亚热带或热带地理区域。此外,与Nipponbare(NIP)和Shuhui498(R498)的比较显示,LM8基因组中有许多特定的结构变异(SV),而LM8和NIP之间的SV比LM8和R498之间少。接下来,鉴定了96个WRKY和464个NBS基因,并将其定位在LM8染色体上以消除冗余。III组中的三个WRKY基因(ORUFILM02g002693,ORUFILM05g002725和ORUFILM05g001757)和一个RNL[包括对白粉病8(RPW8)结构域的抗性,国家统计局,在LM8中检测到富含亮氨酸重复序列(LRRs)]型NBS基因(ORUFILM12g000772)。在NBS基因中,仅在ORUFILM12g000772中检测到RPW8域。如先前报道的,该基因可以提高植物对病原体的抗性。它的分类和潜在用途意味着LM8应被视为与水稻育种计划相关的种质资源。
    Common weedy rice plants are important genetic resources for modern breeding programs because they are the closest relatives to rice cultivars and their genomes contain elite genes. Determining the utility and copy numbers of WRKY and nucleotide-binding site (NBS) resistance-related genes may help to clarify their variation patterns and lead to crop improvements. In this study, the weedy rice line LM8 was examined at the whole-genome level. To identify the Oryza sativa japonica subpopulation that LM8 belongs to, the single nucleotide polymorphisms (SNPs) of 180 cultivated and 23 weedy rice varieties were used to construct a phylogenetic tree and a principal component analysis and STRUCTURE analysis were performed. The results indicated that LM8 with admixture components from japonica (GJ) and indica (XI) belonged to GJ-admixture (GJ-adm), with more than 60% of its genetic background derived from XI-2 (22.98%), GJ-tropical (22.86%), and GJ-subtropical (17.76%). Less than 9% of its genetic background was introgressed from weedy rice. Our results also suggested LM8 may have originated in a subtropical or tropical geographic region. Moreover, the comparisons with Nipponbare (NIP) and Shuhui498 (R498) revealed many specific structure variations (SVs) in the LM8 genome and fewer SVs between LM8 and NIP than between LM8 and R498. Next, 96 WRKY and 464 NBS genes were identified and mapped on LM8 chromosomes to eliminate redundancies. Three WRKY genes (ORUFILM02g002693, ORUFILM05g002725, and ORUFILM05g001757) in group III and one RNL [including the resistance to powdery mildew 8 (RPW8) domain, NBS, and leucine rich repeats (LRRs)] type NBS gene (ORUFILM12g000772) were detected in LM8. Among the NBS genes, the RPW8 domain was detected only in ORUFILM12g000772. This gene may improve plant resistance to pathogens as previously reported. Its classification and potential utility imply LM8 should be considered as a germplasm resource relevant for rice breeding programs.
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  • 文章类型: Journal Article
    黄金是有价值的,化学活化或提取具有挑战性的关键元素。无氰提金是现在的重点,和N-溴代琥珀酰亚胺(NBS)引起了人们的关注。在这里,通过对元素金和含金矿石反应的综合分析和检测,深入揭示了对可能机理的新见解。在金箔上的实验表明,Au可以在NBS溶液中被激活,以进行令人满意的溶解。在NBS用量为0.05M的最佳条件下,NBS在矿石中提取金时的收率高达86.24%,液固比4:1,搅拌速度400rpm,pH8,25°C,浸出20小时,而其他共存金属的产量几乎可以忽略不计。该过程导致直接,高效,一罐转换黄金,变成简单的水溶性盐。表征表明,NBS的框架没有被破坏,只有溴从骨架中分离出来。中性金原子氧化为三价Au(III)发生在温和的,清洁和室温化学,将黄金转换为[AuBr4]-,和琥珀酰亚胺的框架。NBS的原位自催化产生的活性溴和自由基Br(Br•)是造成这种情况的原因。系统的结果预示着制备金衍生物和金提取工业的绿色程序。
    Gold is a valued, critical element whose chemical activation or extraction is challenging. Non-cyanide extraction of gold is now the focus, and N-bromosuccinimide(NBS) is attracting attention. Herein, new insights into the possible mechanism are deeply revealed through comprehensive analysis and detection of the reaction by using elementary gold and gold bearing ore. Experiments on gold foil indicate that Au can be activated in NBS solution to perform a satisfactory dissolution. Application of NBS in gold extraction from ore show a high yield of 86.24% under optimal conditions of NBS dosage 0.05 M, liquid-solid ratio 4:1, stirring speed 400 rpm, pH 8, 25 °C and leaching for 20 h, while yields of other coexisting metals are nearly negligible. The process leads to direct, efficient, one-pot conversion of gold, into simple water-soluble salts. Characterizations show that the framework of NBS are not destroyed, only bromine separates from the framework. The oxidation of neutral gold atom to trivalent Au(III) occurs in a mild, clean and room-temperature chemistry, which converts gold to [AuBr4]-, and the framework to succinimide. The active bromine and radical Br (Br•) generated from in-situ autocatalysis of NBS are responsible for this. The systematic results herald a green procedure for preparation of gold derivatives and gold extraction industry.
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  • 文章类型: Journal Article
    描述了一种简单而快速的方法,该方法可从具有NXS(X=Cl或Br)的磺酰肼有效合成磺酰氯/溴化物,并在后期转化为其他几个官能团。多种亲核试剂可以参与这种转化,从而允许合成复杂的磺酰胺和磺酸盐。在大多数情况下,这些反应是高度选择性的,简单,干净,以优异的产量提供产品。
    A simple and rapid method for efficient synthesis of sulfonyl chlorides/bromides from sulfonyl hydrazide with NXS (X = Cl or Br) and late-stage conversion to several other functional groups was described. A variety of nucleophiles could be engaged in this transformation, thus permitting the synthesis of complex sulfonamides and sulfonates. In most cases, these reactions are highly selective, simple, and clean, affording products at excellent yields.
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  • 文章类型: Journal Article
    BACKGROUND: The NBS disease-related gene family coordinates the inherent immune system in plants in response to pathogen infections. Previous studies have identified NBS-encoding genes in Pyrus bretschneideri (\'Dangshansuli\', an Asian pear) and Pyrus communis (\'Bartlett\', a European pear) genomes, but the patterns of genetic variation and selection pressure on these genes during pear domestication have remained unsolved.
    RESULTS: In this study, 338 and 412 NBS-encoding genes were identified from Asian and European pear genomes. This difference between the two pear species was the result of proximal duplications. About 15.79% orthologous gene pairs had Ka/Ks ratio more than one, indicating two pear species undergo strong positive selection after the divergence of Asian and European pear. We identified 21 and 15 NBS-encoding genes under fire blight and black spot disease-related QTL, respectively, suggesting their importance in disease resistance. Domestication caused decreased nucleotide diversity across NBS genes in Asian cultivars (cultivated 6.23E-03; wild 6.47E-03), but opposite trend (cultivated 6.48E-03; wild 5.91E-03) appeared in European pears. Many NBS-encoding coding regions showed Ka/Ks ratio of greater than 1, indicating the role of positive selection in shaping diversity of NBS-encoding genes in pear. Furthermore, we detected 295 and 122 significantly different SNPs between wild and domesticated accessions in Asian and European pear populations. Two NBS genes (Pbr025269.1 and Pbr019876.1) with significantly different SNPs showed >5x upregulation between wild and cultivated pear accessions, and > 2x upregulation in Pyrus calleryana after inoculation with Alternaria alternata. We propose that positively selected and significantly different SNPs of an NBS-encoding gene (Pbr025269.1) regulate gene expression differences in the wild and cultivated groups, which may affect resistance in pear against A. alternata.
    CONCLUSIONS: Proximal duplication mainly led to the different number of NBS-encoding genes in P. bretschneideri and P. communis genomes. The patterns of genetic diversity and positive selection pressure differed between Asian and European pear populations, most likely due to their independent domestication events. This analysis helps us understand the evolution, diversity, and selection pressure in the NBS-encoding gene family in Asian and European populations, and provides opportunities to study mechanisms of disease resistance in pear.
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  • 文章类型: Journal Article
    尽管在许多应用中都很有价值,只有重链的抗体(HcAbs)自然只在骆驼和鲨鱼中产生,这是不容易访问和处理。在小型实验动物中生产这种类型的抗体将显著促进它们的应用。我们先前报道了一种小鼠细胞系,其中小鼠γ1的CH1外显子被删除,可以表达仅重链的IgG1抗体。然而,这些小鼠在免疫时对特异性抗原表现出极弱的IgG1反应,我们只能使用这些小鼠获得对抗原具有低亲和力的单个VH结构域。一种可能性是小鼠种系VH库不足以支持功能性仅重链抗体的表达。在这项研究中,我们报道了大鼠系的产生,其中γ2a基因的CH1外显子被去除,γ1和γ2b基因被沉默。虽然转基因大鼠表达了只有重链的IgG2a,它们还表现出对抗原免疫的非常弱的IgG2a应答。使用从免疫大鼠扩增的IgG2aVH片段构建的噬菌体文库的淘选鉴定了抗原特异性单一VH抗体,它也表现出比商业单克隆抗体低得多的亲和力。连同我们以前的报告,这项研究表明,CH1外显子的简单遗传去除并不能保证仅有重链的功能性抗体的成功表达.
    Despite great values in many applications, heavy chain-only antibodies (HcAbs) are naturally only produced in camelids and sharks, which are not easy to access and handle. Production of the type of antibodies in small laboratory animals would remarkably facilitate their applications. We previously reported a mouse line in which the CH1 exon of mouse γ1 was deleted that could express heavy chain-only IgG1 antibodies. However, these mice showed an extremely weak IgG1 response to specific antigens when immunized, and we could only achieve single VH domains with low affinity to antigens using these mice. One possibility is that the mouse germline VH repertoire was not sufficient to support the expression of functional heavy chain-only antibodies. In this study, we report the generation of a rat line in which the CH1 exon of the γ2a gene was removed and the γ1 and γ2b genes were silenced. Although the genetically modified rats expressed heavy chain-only IgG2a, they also exhibited a very weak IgG2a response to antigen immunization. Panning of a phage library constructed using IgG2a VH segments amplified from immunized rats identified antigen-specific single VH antibodies, which also exhibited much lower affinity than that of commercial mAbs. Together with our previous report, this study suggests that the simple genetic removal of the CH1 exon does not guarantee the successful expression of functional heavy chain-only antibodies.
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  • 文章类型: Journal Article
    Plants often use nucleotide-binding leucine-rich repeats (NLRs) to recognize specific virulence proteins and activate the hypersensitive response thereby defending against invaders. However, data on NLRs and the resistance mechanism of NLR protein mediation in tea plant are extremely limited. In this study, 400 and 303 CsNLRs were identified from the genomes of C. sinensis var. sinensis (CSS) and C. sinensis var. assamica (CSA), respectively. Phylogenetic analysis revealed that the numbers in CNL groups are predominant in both CSS and CSA. RNA-Seq revealed that the expression of CsNLRs is induced by Colletotrichum fructicola, cold, drought, salt stress and exogenous methyl jasmonate. The 21 CsCNLs that are highly expressed in tea plant under biotic and abiotic stresses as well as during bud dormancy and in different tissues are identified. Gene structure analysis revealed several cis-regulatory elements associated with phytohormones and light responsiveness in the promoter regions of these 21 CsCNLs.
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  • 文章类型: Journal Article
    A facile and eco-friendly method has been developed for the synthesis of imidazoles and thiazoles from ethylarenes in water. The reaction proceeds via in situ formation of α-bromoketone using NBS as a bromine source as well as an oxidant, followed by trapping with suitable nucleophiles to provide the corresponding products in good yields under metal-free conditions.
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