biphasic

双相
  • 文章类型: Journal Article
    樟子树(LE1),樟子松(LE2),和SorbusaucupariaL.(LE3)叶子的提取物用于合成含有不同量氯化银(AgCl)的银(Ag)纳米复合材料,银金属(Agmet),和磷酸银(Ag3PO4)。这些纳米复合材料被叶提取物中的有机官能团覆盖。值得注意的是,纳米复合材料在细胞上引起双相细胞毒性反应;首先归因于细胞生长的抑制,其次归因于细胞死亡。纳米复合材料与正常胚胎肾(HEK293)细胞在癌细胞的细胞毒性范围内是生物相容的。LE2Ag1[25(±1)°C合成]纳米复合材料在24小时孵育后对HeLa(致死浓度-LC50值为11.4μgmL-1)和A549(LC50值为14.7μgmL-1)表现出最高的细胞毒性。他们各自的LC50值较大。对于HeLa细胞系,这种设计的LE2Ag1纳米复合材料的LC50值与顺铂的有效浓度(EC50)值相似,是阿霉素的3倍.LE2Ag1纳米复合材料在复合材料中含有Ag3PO4,表面含有P,较高的AgCl含量,所有纳米粒子相的微晶尺寸较小,与所有其他纳米复合材料相比,富碳缺氧表面。
    The Malus sylvestris L. (LE1), Pinus sylvestris L. (LE2), and Sorbus aucuparia L. (LE3) leaves` extracts were used for the synthesis of silver (Ag) nanocomposites containing different amounts of silver chloride (AgCl), silver metal (Agmet), and silver phosphate (Ag3PO4). These nanocomposites were capped with the organic functional groups in the leaf extract. Notably, the nanocomposites caused biphasic cytotoxic response on cells; first attributed to the inhibition of cell growth and second to cell death. The nanocomposites were biocompatible with normal embryonic kidney (HEK293) cells in the cytotoxic range for cancer cells. LE2Ag1 [25(±1) °C synthesis] nanocomposites exhibited the highest cytotoxicity towards HeLa (lethal concentration- LC50 value of 11.4 μg mL-1) and A549 (LC50 value of 14.7 μg mL-1) after 24-h incubation and its efficiency was shown also for the more resistant MCF-7 and MDA-MB-231, however, their respective LC50 values were larger. For the HeLa cell line, this designed LE2Ag1 nanocomposite exhibited an LC50 value similar to the effective concentration (EC50) value of Cisplatin and about 3 times larger than Doxorubicin. LE2Ag1 nanocomposite contained Ag3PO4 in the composite and P on the surface, higher AgCl content, smaller crystallite size of all nanoparticle phases, and carbon-rich oxygen-deficient surface compared to all other nanocomposites.
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  • 文章类型: Journal Article
    钠离子电池(SIB)已成为锂离子电池(LIB)的引人注目的替代品,表现出可比的电化学性能,同时利用丰富的钠资源。在SIB中,P2/O3双相阴极,尽管他们精力充沛,需要进一步改善稳定性,以满足当前的能源需求。本研究引入了一种系统的方法,该方法利用元启发式辅助NSGA-II算法来优化电极材料中的多元素掺杂,旨在超越传统的试错方法,并通过P2和O3相的协同整合来提高阴极容量。提出了元启发式设计的阴极材料Na0.76Ni0.20Mn0.42Fe0.30Mg0.04Ti0.015Zr0.025O2(D-NFMO)的综合相分析,展示了其卓越的初始可逆容量175.5mAhg-1和钠电池中卓越的长期循环稳定性。通过集成多种表征技术来研究结构组成和稳定机理。值得注意的是,观察到D-NFMO中P2→OP4的不可逆相变被显著抑制,导致循环稳定性的显著提高。与原始阴极(P-NFMO)的比较为D-NFMO的长期电化学稳定性提供了深刻的见解,强调其作为高压阴极材料的潜力,利用SIBs中丰富的稀土元素。这项研究为钠离子电池技术的未来发展开辟了新的可能性。
    Sodium-ion batteries (SIBs) have emerged as a compelling alternative to lithium-ion batteries (LIBs), exhibiting comparable electrochemical performance while capitalizing on the abundant availability of sodium resources. In SIBs, P2/O3 biphasic cathodes, despite their high energy, require furthur improvements in stability to meet current energy demands. This study introduces a systematic methodology that leverages the meta-heuristically assisted NSGA-II algorithm to optimize multi-element doping in electrode materials, aiming to transcend conventional trial-and-error methods and enhance cathode capacity by the synergistic integration of P2 and O3 phases. A comprehensive phase analysis of the meta-heuristically designed cathode material Na0.76Ni0.20Mn0.42Fe0.30Mg0.04Ti0.015Zr0.025O2 (D-NFMO) is presented, showcasing its remarkable initial reversible capacity of 175.5 mAh g-1 and exceptional long-term cyclic stability in sodium cells. The investigation of structural composition and the stabilizing mechanisms is performed through the integration of multiple characterization techniques. Remarkably, the irreversible phase transition of P2→OP4 in D-NFMO is observed to be dramatically suppressed, leading to a substantial enhancement in cycling stability. The comparison with the pristine cathode (P-NFMO) offers profound insights into the long-term electrochemical stability of D-NFMO, highlighting its potential as a high-voltage cathode material utilizing abundant earth elements in SIBs. This study opens up new possibilities for future advancements in sodium-ion battery technology.
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  • 文章类型: Journal Article
    双相模型已广泛用于模拟软组织的时间依赖性生物力学反应。在过去的十年中,具有双相负重软组织的关节的建模技术得到了显着改善,增强我们对功能的理解,关节干预的退化机制和结果。本文回顾了近年来的研究进展,具有双相负重软组织的关节计算模型中的挑战和机遇。该综述从生物力学方面介绍关节的功能和退化。关节软骨的不同本构模型,特别是双相材料,在关节接触力学研究的背景下进行了说明。方法,提出了髋关节和膝关节双相模型的进展和主要发现,随后讨论了有待解决的挑战,包括融合问题,计算成本高,验证不充分。最后,提供并讨论了特定主题建模和组织工程领域的机会和临床见解。
    Biphasic models have been widely used to simulate the time-dependent biomechanical response of soft tissues. Modelling techniques of joints with biphasic weight-bearing soft tissues have been markedly improved over the last decade, enhancing our understanding of the function, degenerative mechanism and outcomes of interventions of joints. This paper reviews the recent advances, challenges and opportunities in computational models of joints with biphasic weight-bearing soft tissues. The review begins with an introduction of the function and degeneration of joints from a biomechanical aspect. Different constitutive models of articular cartilage, in particular biphasic materials, are illustrated in the context of the study of contact mechanics in joints. Approaches, advances and major findings of biphasic models of the hip and knee are presented, followed by a discussion of the challenges awaiting to be addressed, including the convergence issue, high computational cost and inadequate validation. Finally, opportunities and clinical insights in the areas of subject-specific modeling and tissue engineering are provided and discussed.
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  • 文章类型: Journal Article
    慢性炎性疾病被认为是世界上最重要的死亡原因。由于缺乏对早期疾病进展中涉及的生物学因素的了解,目前对炎性疾病的治疗是有限的。神经生长因子(nervegrowthfactor,NGF)是一种与骨关节炎等炎症和自身免疫性疾病直接相关的神经营养因子。多发性硬化症,和类风湿性关节炎。已经显示,NGF水平在炎症部位显著上调,并且在发展强烈的炎症反应中起关键作用。然而,在炎症的初始进展阶段,对NGF的时间表达谱知之甚少。本研究旨在确定佐剂性关节炎(AIA)期间大鼠皮肤(表皮)中NGF的时间表达模式。将SD大鼠随机分为对照组和完全弗氏佐剂(CFA)治疗组。在不同时间点的单侧AIA后评估NGF水平,发现AIA引起的外周炎症以双相模式显著上调NGFmRNA和蛋白的表达。这些结果表明,在AIA期间,NGF信号传导对于启动和维持大鼠周围神经源性炎症至关重要。
    Chronic inflammatory diseases are considered the most significant cause of death worldwide. Current treatments for inflammatory diseases are limited due to the lack of understanding of the biological factors involved in early-stage disease progression. Nerve growth factor (NGF) is a neurotrophic factor directly associated with inflammatory and autoimmune diseases like osteoarthritis, multiple sclerosis, and rheumatoid arthritis. It has been shown that NGF levels are significantly upregulated at the site of inflammation and play a crucial role in developing a robust inflammatory response. However, little is known about NGF\'s temporal expression profile during the initial progressive phase of inflammation. This study aimed to determine the temporal expression patterns of NGF in rat skin (epidermis) during adjuvant-induced arthritis (AIA). Sprague Dawley rats were randomly divided into control and complete Freund\'s adjuvant (CFA)-treated groups. Levels of NGF were evaluated following unilateral AIA at different time points, and it was found that peripheral inflammation due to AIA significantly upregulated the expression of NGF mRNA and protein in a biphasic pattern. These results suggest that NGF signaling is crucial for initiating and maintaining peripheral neurogenic inflammation in rats during AIA.
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  • 文章类型: Journal Article
    先前的子宫内膜癌(EC)FIGO分期主要取决于诊断时疾病扩散到解剖部位的程度。最近的一项(2023年)纳入了临床病理特征,如组织学亚型,肿瘤分级,淋巴管间隙侵犯(LVI)的程度,and,当可用时,EC的分子亚型。强调准确的组织学分型,肿瘤分级,癌症的分子特征比以往任何时候都强。这篇综述针对五个类别的组织学亚型和EC分级中具有挑战性的诊断模式:1。带梭形细胞的EC,2.带透明细胞的EC,3.具有乳头状结构的EC,4.具有双相形态的EC,和5.具有微腺结构的EC。讨论了区分低级和高级癌症的形态学特征,以及相关的临床检查。总结了有关该疾病的诊断和预后的最新分子遗传学发现以及相关临床试验的结果。LVI评估中的潜在挑战遵循这些部分。本综述的最后一部分包括将EC的分子亚型纳入临床实践的文献概述。
    The previous endometrial cancer (EC) FIGO staging primarily relied on the extent of the disease spread into the anatomical sites at diagnosis. The most recent one (2023) incorporates clinicopathological features such as histological subtype, tumor grade, the extent of lymphovascular space invasion (LVI), and, when available, molecular subtypes of EC. The emphasis on accurate histological typing, tumor grading, and the molecular features of the cancer is stronger than ever. This review addresses challenging diagnostic patterns in the histologic subtyping and grading EC under five categories: 1. EC with spindle cells, 2. EC with clear cells, 3. EC with a papillary architecture, 4. EC with a biphasic morphology, and 5. EC with a microglandular architecture. The morphological features differentiating low- and high-grade cancers are discussed, along with relevant clinical work-ups. Recent molecular genetic findings regarding the diagnosis and prognosis of the disease and the results of related clinical trials are summarized. The potential challenges in the evaluation of LVI follow these sections. The final section of the review includes an overview of the literature on incorporating molecular subtypes of EC into clinical practice.
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  • 文章类型: Journal Article
    电荷平衡用于深部脑刺激(DBS),以避免在组织-电极界面处净电荷积聚,从而导致神经损伤。电荷平衡范例包括被动再充电和主动再充电。在被动充电中,每个阴极脉冲都伴随着下一次刺激之前的等待期,而主动充电使用能量依次传递对称的阳极和阴极刺激脉冲,产生净零电荷。我们试图确定刺激诱导的副作用阈值之间的差异术中单极复查期间的被动充电。
    对2021年至2022年连续65例接受DBS的患者进行回顾性分析。对所有纳入患者进行了术中单极检查,同时进行了主动充电和被动充电,以确定副作用刺激阈值。16例患者(共64例DBS接触者)符合进一步分析的纳入标准。将术中单极审查结果与第一次DBS编程访问的单极审查进行比较。
    术中主动再充电刺激阈值平均值为4.1mA,而平均术中被动再充电刺激阈值为3.9mA,尽管这种差异在t检验中没有统计学意义(p=0.442)。临床随访时的平均刺激阈值为3.2mA。在皮尔逊相关性中,术中被动再充电阈值与随访刺激阈值(Pearsonr=0.5281,p<0.001)的相关性高于术中主动再充电阈值(Pearsonr=0.340,p=0.018),然而,在FisherZ相关检验中,这些相关性之间的差异无统计学意义(p=0.294).术中被动再充电刺激阈值与随访刺激阈值的平均差值为0.8mA,而术中主动充电阈值和随访阈值之间的平均差异为1.2mA。这种差异在t检验中没有统计学意义(p=0.134)。
    术中主动再充电和被动再充电刺激均与首次编程访视时的单极检查密切相关。没有观察到统计学上的显着差异,表明术中可以使用被动或主动充电。
    UNASSIGNED: Charge balancing is used in deep brain stimulation (DBS) to avoid net charge accumulation at the tissue-electrode interface that can result in neural damage. Charge balancing paradigms include passive recharge and active recharge. In passive recharge, each cathodic pulse is accompanied by a waiting period before the next stimulation, whereas active recharge uses energy to deliver symmetric anodic and cathodic stimulation pulses sequentially, producing a net zero charge. We sought to determine differences in stimulation induced side effect thresholds between active vs. passive recharge during the intraoperative monopolar review.
    UNASSIGNED: Sixty-five consecutive patients undergoing DBS from 2021 to 2022 were retrospectively reviewed. Intraoperative monopolar review was performed with both active recharge and passive recharge for all included patients to determine side effect stimulation thresholds. Sixteen patients with 64 total DBS contacts met inclusion criteria for further analysis. Intraoperative monopolar review results were compared with the monopolar review from the first DBS programming visit.
    UNASSIGNED: The mean intraoperative active recharge stimulation threshold was 4.1 mA, while the mean intraoperative passive recharge stimulation threshold was 3.9 mA, though this difference was not statistically significant on t-test (p = 0.442). Mean stimulation threshold at clinic follow-up was 3.2 mA. In Pearson correlation, intraoperative passive recharge thresholds had stronger correlation with follow-up stimulation thresholds (Pearson r = 0.5281, p < 0.001) than intraoperative active recharge (Pearson r = 0.340, p = 0.018), however the difference between these correlations was not statistically significant on Fisher Z correlation test (p = 0.294). The mean difference between intraoperative passive recharge stimulation threshold and follow-up stimulation threshold was 0.8 mA, while the mean difference between intraoperative active recharge threshold and follow-up threshold was 1.2 mA. This difference was not statistically significant on a t-test (p = 0.134).
    UNASSIGNED: Both intraoperative active recharge and passive recharge stimulation were well-correlated with the monopolar review at the first programming visit. No statistically significant differences were observed suggesting that either passive or active recharge may be utilized intraoperatively.
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  • 文章类型: Case Reports
    梭形细胞癌(SpCC)或肉瘤样癌是一种罕见的双相恶性肿瘤,主要发生在上消化道。它具有纺锤状或多形性肿瘤细胞,模拟具有上皮起源的真正肉瘤。WHO认为这种肿瘤是鳞状细胞癌的侵袭性变体,并进一步将其指定为梭形细胞癌。这种肿瘤以其复发和转移的倾向而闻名,这加强了其正确诊断的重要性。在我们的案例报告中,根据组织病理学和免疫组织化学特征,我们谈论涉及口腔的肉瘤样癌具有高转移率。
    Spindle cell carcinoma (SpCC) or sarcomatoid carcinoma is an uncommon biphasic malignant neoplasm occurring mainly in the upper aerodigestive tract. It has spindled or pleomorphic tumor cells simulating a true sarcoma with epithelial origin. WHO recognized this tumor as an aggressive variant of squamous cell carcinoma and further designated it as spindle cell carcinoma. This neoplasm is known for its propensity of recurrence and metastasis reinforcing the importance of its proper diagnosis. In our case report, we talk about sarcomatoid carcinoma involving the oral cavity having a high metastasizing rate according to histopathological and immunohistochemical features.
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  • 文章类型: Journal Article
    具有胸腺样元素的梭形上皮肿瘤(SETTLE)是由上皮和梭形细胞成分组成的双相肿瘤。它是一种罕见的惰性肿瘤,出现在甲状腺,最常见的影响儿童和年轻人。由于其稀有和形态学诊断困难,该实体大多被忽视。我们讨论了两种不同表述的SETTLE案例,诊断挑战和从中吸取的教训。应将SETTLE视为差异,尤其是在处理青年和青少年的甲状腺病变时。本文讨论了组织学细节和要记住的常见模拟物,以帮助到达活检标本的最终诊断。
    Spindle epithelial tumor with thymic like elements (SETTLE) is a biphasic tumor composed of epithelial and spindle cell components. It is an uncommon indolent tumor arising in the thyroid gland and most commonly affects the children and young adults. This entity is mostly overlooked because of its rarity and diagnostic difficulty on morphology. We discuss two cases of SETTLE with varied presentation, diagnostic challenges and lessons learnt from them.SETTLE should be considered as a differential especially when dealing with a thyroid lesion in young and adolescent. The article discusses the histologic details and common mimickers to be borne in mind aiding in arrival at the final diagnosis on biopsy specimens.
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  • 文章类型: Journal Article
    双相乳头状肾细胞癌(双相鳞状肺泡细胞癌的同义词)被认为在乳头状肾细胞癌(PRCC)的范围内。报告的双相PRCC病例少于70例,关于病理谱和临床过程的数据有限。评估了17例双相PRCC病例和10例具有相似双相形态的乳头状腺瘤。双相PRCC患者的平均年龄为62岁(男女比例为1.8:1),从10例部分肾切除术中,根治性肾切除术6例,和1个活检。平均肿瘤大小为3.6cm(范围1.6-8cm),24%显示多焦点。17例中有15例仅限于肾脏(其中1例分期为pT2a,但诊断时有肺转移),2/17例分期为T3a。所有肿瘤均显示典型的双相形态,鳞状病灶的范围在10%至95%之间广泛变化。在88%的病例中发现了腹膜炎。所有双相PRCC测试显示PAX8阳性(16/16),角蛋白7(17/17),EMA(15/15),AMACR(17/17),和波形蛋白(12/12)在大细胞和小细胞中;细胞周期蛋白D1仅在大细胞中表达(16/16)。10个乳头状腺瘤显示出与双相PRCC相似的免疫特征。对13个双相PRCC进行的NGS测试显示,有4个(31%)携带METSNV。在1/5(20%)乳头状腺瘤中,确定了致病性METSNV。双相PRCC很少见,与“1型”PRCC具有相似的免疫特征,但在大细胞成分中对细胞周期蛋白D1具有明显的阳性。尽管大多数双相PRCC病例规模较小,低阶段,以一种懒惰的行为,1例患者患有转移性疾病,1例患者死于该疾病.
    Biphasic papillary renal cell carcinoma (synonymous with biphasic squamoid alveolar renal cell carcinoma) is considered within the spectrum of papillary renal cell carcinoma (PRCC). With < 70 reported cases of biphasic PRCC, there is limited data on the pathologic spectrum and clinical course. Seventeen biphasic PRCC cases and 10 papillary adenomas with similar biphasic morphology were assessed. The mean age of the biphasic PRCC patients was 62 years (male to female ratio of 1.8:1), from 10 partial nephrectomies, 6 radical nephrectomies, and 1 biopsy. The mean tumor size was 3.6 cm (range 1.6-8 cm), with 24% showing multifocality. Fifteen out of 17 cases were limited to the kidney (one of which was staged as pT2a but had lung metastases at diagnosis) and 2/17 cases were staged as T3a. All tumors showed typical biphasic morphology with an extent of squamoid foci widely variable from 10 to 95%. Emperipolesis was identified in 88% of cases. All biphasic PRCC tested exhibited positivity for PAX8 (16/16), keratin 7 (17/17), EMA (15/15), AMACR (17/17), and vimentin (12/12) in both large and small cells; cyclin D1 was only expressed in the large cells (16/16). The 10 papillary adenomas showed a similar immunoprofile to biphasic PRCC. NGS testing performed on 13 biphasic PRCC revealed 4 (31%) harboring MET SNVs. In 1/5 (20%) papillary adenomas, a pathogenic MET SNV was identified. Biphasic PRCC is rare with a generally similar immunoprofile to \"type 1\" PRCC but with notable strong positivity for cyclin D1 in the large cell component. Although most of the biphasic PRCC cases were of small size, low stage, and with an indolent behavior, one patient had metastatic disease and one patient died of the disease.
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  • 文章类型: Case Reports
    类风湿性关节炎(RA)可引起许多喉部表现;然而,其中大多数不会引起呼吸道急症。由于一个或两个声带的声带固定引起的气道阻塞发生在RA疾病过程的后期,并且可以表现为吸气性喘鸣。我们报告了一位老年女士的病例,该女士出现了RA引起的双侧声带麻痹继发的急性喘鸣,并描述了考虑的各种治疗方案。一名85岁的妇女出现呼吸急症室,stridor,和困倦。进行了动脉血气(ABG)检查,显示60%氧气下的高碳酸血症性呼吸衰竭,血液检查显示感染标志物中度升高,胸部X射线显示右下区域巩固。进行了柔性鼻内窥镜检查,显示由于双侧环蝶骨关节固定,双侧固定和内收的声带,声门的测量值大约为3毫米,有反常呼吸的证据。该患者在18个月前以类似的表现入院,然而没有那么严重,再一次,双侧声带麻痹归因于她长期的RA.她通过无创通气稳定下来,并转移到急性呼吸护理单元。彻底讨论了长期的手术选择,包括气管造口术,声带偏侧化,脊髓切开术,和动脉粥样硬化切除术,但最终,这些选择都被认为不适合患者,因此在停用双水平气道正压后采用姑息治疗方法.Stridor是RA的晚期但危及生命的并发症,具有可行的气管造口术和静态声门扩大手术的手术选择;然而,此类手术的适当性应始终与患者的当前临床状态以及它们可能对患者生活质量的影响程度相关。
    Rheumatoid arthritis (RA) can cause a number of laryngeal manifestations; however, most of these do not cause an airway emergency. Airway obstruction due to vocal cord fixation of one or both vocal cords occurs late in the disease process of RA and can present as an inspiratory stridor. We report the case of an elderly lady who presented with acute stridor secondary to RA-induced bilateral vocal cord palsy and describe the various management options that were considered. An 85-year-old woman presented to A&E Resus with tachypnoea, stridor, and drowsiness. An arterial blood gas (ABG) was performed which showed hypercapnic respiratory failure on 60% oxygen with blood tests revealing moderately raised infective markers and a chest X-ray displaying right lower zone consolidation. A flexible nasendoscopy was performed which demonstrated bilaterally fixed and adducted vocal cords due to bilateral cricoarytenoid joint fixation, with a rima glottidis measurement of approximately 3 mm and evidence of paradoxical breathing. The patient had been admitted with a similar presentation 18 months before, however not as severe, and once again, the bilateral vocal cord palsy had been attributed to her longstanding RA. She was stabilised with non-invasive ventilation and transferred to the acute respiratory care unit. Long-term surgical options were thoroughly discussed including tracheostomy, vocal cord lateralisation, cordotomy, and arytenoidectomy, but ultimately, these options were all deemed unsuitable for the patient and so a palliative care approach was adopted following the withdrawal of bilevel positive airway pressure. Stridor is a late but life-threatening complication of RA that has viable surgical options of tracheostomy and static glottis enlarging procedures; however, the appropriateness of such procedures should always be correlated with the patient\'s current clinical status and the extent to which they may impact on the patient\'s quality of life.
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