Characterization

表征
  • 文章类型: Journal Article
    天南星科拥有超过3000种开花植物,在热带地区茁壮成长。这个家族的研究重点是凝集素,对结合碳水化合物有亲和力的蛋白质。这篇评论试图收集从过去三十年中从天南星科植物中提取的凝集素进行的大量研究中收集的数据。我们的检查涵盖了它们的提取和纯化方法,它们与碳水化合物的特定相互作用,它们的分子结构,和各种物理化学特性。此外,我们研究了这些凝集素的生物学活性,并研究了克隆其基因的结果。尽管它们明显相似,这些凝集素表现出显著的区别,特别是关于它们与动物和人类红细胞相互作用的独特偏好,他们的糖亲和力,功能的关键氨基酸,它们的亚基的分子量和各自的拓扑结构,最终,它们的二聚化和3Dβ-棱镜-II结构,据报道,这与其他GNA相关凝集素中观察到的不同。这些差异不仅加深了我们对单子叶植物凝集素的理解,而且使这些蛋白质具有内在的吸引力。这篇评论标志着首次尝试合并几乎所有已发表的有关天南星科凝集素的报告,目的是为糖生物学科学家提供对潜在实验室挑战的基本见解,这些凝集素的特点,以及未来研究的途径。
    The Araceae family boasts >3000 species of flowering plants that thrive across the tropics. Among the focal points of study within this family are lectins, proteins with affinity for binding carbohydrates. This review endeavors to gather data gleaned from numerous studies conducted over the past three decades on lectins extracted from Araceae plants. Our examination spans their extraction and purification methods, their specific interactions with carbohydrates, their molecular structures, and various physicochemical characteristics. Furthermore, we investigated the biological activities of these lectins and investigated the outcomes of cloning their genes. Despite their apparent similarities, these lectins exhibit notable distinctions, particularly regarding their unique preferences in interacting with erythrocytes from animals and humans, their sugar affinities, the critical amino acids for their functionality, the molecular weights of their subunits and their respective topologies, and ultimately, their dimerization and 3D β-prism-II structure, which reportedly diverge from those observed in other GNA-related lectins. These discrepancies not only deepen our understanding of monocot lectins but also render these proteins inherently captivating. This review marks the inaugural attempt at consolidating almost all published reports on lectins from the Araceae family, with the aim of furnishing glycobiology scientists with essential insights into potential laboratory challenges, the characteristics of these lectins, and avenues for future research.
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  • 文章类型: Journal Article
    经颅磁刺激和脑电图(TMS-EEG)记录对于以无创和无任务的方式直接评估皮质兴奋性和抑制作用至关重要。TMS-EEG信号以TMS诱发电位(TEP)为特征,用于评估皮质功能。尽管如此,多年来,已经使用不同的时间窗口(TW)来计算它们。此外,对于所有省略受试者间变异性的参与者,这些TW往往是相同的。因此,这项研究的目的是评估使用不同的TW来计算TEP的效果,从常见的固定TW转向更具适应性的个性化TW。29名健康(HC)对照和20名精神分裂症患者(SCZ)接受了单脉冲(SP)TMS-EEG协议。首先,只有HC被认为在振幅和地形分布方面评估了三种不同TW的TEP。其次,纳入SCZ患者以确定哪种TW更好地表征SCZ的脑改变。结果表明,更个性化的TW提供了更好的表征SPTMS-EEG信号,尽管它们都表现出相同的趋势。关于组间比较,个性化的TW提供了更好的群体之间的区别。它们还为SCZ群体中皮质兴奋性/抑制的可能失衡提供了进一步的支持,这是由于其在N45TEP中的活性降低和在N100中的振幅值更大。结果还表明SCZ大脑具有基线过度活跃状态,因为SCZ的TEP比HC的TEP出现得更早。
    Transcranial magnetic stimulation and electroencephalography (TMS-EEG) recordings are crucial to directly assess cortical excitability and inhibition in a non-invasive and task-free manner. TMS-EEG signals are characterized by TMS-evoked potentials (TEPs), which are employed to evaluate cortical function. Nonetheless, different time windows (TW) have been used to compute them over the years. Moreover, these TWs tend to be the same for all participants omitting the intersubject variability. Therefore, the objective of this study is to assess the effect of using different TWs to compute the TEPs, moving from a common fixed TW to more adaptive individualized TWs. Twenty-nine healthy (HC) controls and twenty schizophrenia patients (SCZ) underwent single-pulse (SP) TMS-EEG protocol. Firstly, only the HC were considered to evaluate the TEPs for three different TWs in terms of amplitude and topographical distribution. Secondly, the SCZ patients were included to determine which TW is better to characterize the brain alterations of SCZ. The results indicate that a more individualized TW provides a better characterization of the SP TMS-EEG signals, although all of them show the same tendency. Regarding the comparison between groups, the individualized TW is the one that provides a better differentiation between populations. They also provide further support to the possible imbalance of cortical excitability/inhibition in the SCZ population due to its reduced activity in the N45 TEP and greater amplitude values in the N100. Results also suggest that the SCZ brain has a baseline hyperactive state since the TEPs of the SCZ appear earlier than those of the HC.
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  • 文章类型: Journal Article
    Dilleniaindica是Dilleniaceae的药用树,其花提取物用于合成银纳米颗粒(AgNPs)。合成AgNP的最佳条件如下:2mMAgNO3,pH4.5和48小时反应时间。通过紫外可见光谱研究,在435nm波长处观察到AgNP的特征带。傅里叶变换红外(FTIR)分析描绘了植物提取物的几个官能团参与AgNP的合成。纳米粒子大多呈球形,分布均匀,当通过透射电子显微镜(TEM)进行观察时。能量色散X射线(EDX)显示大约在3keV处的吸收峰,因此证实AgNP中存在银金属。X射线衍射(XRD)研究和选区电子衍射(SAED)图显示了AgNP的结晶性质。动态光散射(DLS)分析显示纳米颗粒的平均尺寸为50.17nm,多分散指数(PDI)值为0.298。观察到纳米颗粒的ζ电位为-24.9mV。为了评估抗菌活性,单独使用AgNPs或将其与抗生素联合使用均对6种致病菌进行了试验.AgNP与抗生素的组合对博氏志贺菌(16.07±0.35)和肺炎克雷伯菌(15.03±0.20)的效果最大。单独的AgNP对革兰氏阳性细菌均显示出最大的抑制作用:耐甲氧西林金黄色葡萄球菌(19.97±0.20mm)和屎肠球菌(19.80±0.15mm)。单独使用抗生素可观察到对阴沟肠细胞和铜绿假单胞菌的最大抑制作用。通过2,2-二苯基-1-吡啶酰肼(DPPH)和DNA切口测定的评估证明了纳米颗粒的抗氧化能力。
    Dillenia indica is a medicinal tree of the Dilleniaceae and its flower extract was used for the synthesis of silver nanoparticle (AgNPs). The optimal conditions for AgNPs synthesis were as such: 2 mM AgNO3, pH 4.5 and 48-h reaction time. The characteristic band of AgNPs was observed at the wavelength of 435 nm by UV-visible spectroscopic study. Fourier-transform infrared (FTIR) analysis depicted the involvement of several functional groups of plant extracts in the synthesis of AgNPs. Nanoparticles were mostly spherical shaped and uniformly distributed, when observation was made by Transmission electron microscopy (TEM). Energy Dispersive X-Ray (EDX) showed absorption peak approximately at 3 keV thus confirmed the presence of silver metal in AgNP. X-ray diffraction (XRD) investigation and selected area electron diffraction (SAED) patterns showed the crystalline nature of the AgNPs. Dynamic light scattering (DLS) analysis exhibited average size of the nanoparticles as 50.17 nm with a polydispersity index (PDI) value of 0.298. The zeta potential of nanoparticles was observed as -24.9 mV. To assess antibacterial activity, both AgNPs alone or its combination with the antibiotic were tried against six pathogenic bacteria. The combination of AgNPs with antibiotic was maximum effective against Shigella boydii (16.07 ± 0.35) and Klebsiella pneumoniae (15.03 ± 0.20). AgNPs alone showed maximum inhibition for both Gram-positive bacteria: methicillin-resistant Staphylococcus aureus (19.97 ± 0.20 mm) and Enterococcus faecium (19.80 ± 0.15 mm). Maximum inhibition of Enterobactor cloacae and Pseudomonas aeruginosa was observed by antibiotic taken alone. Evaluation through 2,2-diphenyl-1-picrylhydrazyl (DPPH) and DNA nicking assays demonstrated the antioxidant capabilities of the nanoparticles.
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  • 文章类型: Journal Article
    为了解决与环境相关的问题(废水修复,节能和空气净化)由快速城市化和工业化引起,近年来,新型改性纳米结构光催化剂的合成受到越来越多的关注。我们在此报告了通过溶胶-凝胶法与石墨烯原位氮掺杂化学锚定的TiO2的容易合成。使用X射线衍射的结构分析表明,结晶氮掺杂的石墨烯-二氧化钛(N-GT)纳米复合材料主要由锐钛矿和少量板钛矿相组成。拉曼光谱显示,除了锐钛矿TiO2的主带外,石墨烯特征带还存在于低强度水平。X射线光电子能谱分析揭示了TiO2通过Ti-O-C键与石墨烯的化学键合,还在TiO2晶格和石墨烯纳米片的骨架中取代氮掺杂剂。UV-Vis吸收光谱分析表明,改性材料由于其带隙变窄,可以有效地吸收较长波长范围的光子。N0.06-GT材料对亚甲基蓝的降解效率最高(MB,98%)在紫外线和磺胺甲恶唑(SMX,90.0%)在可见光照射下。复合材料的活性增加归因于高表面积通过更大的吸附容量的协同效应,通过增加光子吸收缩小带隙,并通过石墨烯纳米片和缺陷位点(Ti3和氧空位(Vo))的良好电子可接受性来减少e-/h重组。ROS实验进一步描述了主要是羟基自由基(OH·)和超氧化物阴离子(O2·-)是氧化还原反应过程中污染物降解的原因。总之,我们的发现为这种新材料的制造提供了新的见解,这种材料的效率可以在H2生产等应用中进一步测试,二氧化碳转化为增值产品,在节能和储存方面。
    To solve environmental-related issues (wastewater remediation, energy conservation and air purification) caused by rapid urbanization and industrialization, synthesis of novel and modified nanostructured photocatalyst has received increasing attention in recent years. We herein report the facile synthesis of in situ nitrogen-doped chemically anchored TiO2 with graphene through sol-gel method. The structural analysis using X-ray diffraction showed that the crystalline nitrogen-doped graphene-titanium dioxide (N-GT) nanocomposite is mainly composed of anatase with minor brookite phase. Raman spectroscopy revealed the graphene characteristic band presence at low intensity level in addition to the main bands of anatase TiO2. X-ray photoelectron spectroscopy analysis disclosed the chemical bonding of TiO2 with graphene via Ti-O-C linkage, also the substitution of nitrogen dopant in both TiO2 lattice and into the skeleton of graphene nanoflakes. UV-Vis absorption spectroscopy analysis established that the modified material can efficiently absorb the longer wavelength range photons due to its narrowed band gap. The N0.06-GT material showed the highest degradation efficiency over methylene blue (MB, ∼98%) under UV and sulfamethoxazole (SMX, ∼ 90.0%) under visible light irradiation. The increased activity of the composite is credited to the synergistic effect of high surface area via greater adsorption capacity, narrowed band gap via increased photon absorption, and reduced e-/h+ recombination via good electron acceptability of graphene nanoflakes and defect sites (Ti3+ and oxygen vacancy (Vo)). The ROS experiments further depict that primarily hydroxyl radicals (OH•) and superoxide anions (O2•-) are responsible for the pollutant degradation in the process redox reactions. In summary, our findings specify new insight into the fabrication of this new material whose efficiency can be further tested in applications like H2 production, CO2 conversion to value-added products, and in energy conservation and storage.
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  • 文章类型: Journal Article
    最近对行为分析期刊的评论表明,参与者的人口统计学描述不足。这些评论仅限于几种期刊的简短时期,强调的特定变量(例如,社会经济地位),或仅包括特定人群。当前的范围审查包括1982-2020年《言语行为分析》中所有已发表的文章。在226篇文章中,为1888名参与者编码了六个人口统计学变量。尽管样本量很小(即,62.3%的研究中少于6名参与者),大多数参与者仅报告了年龄(85.4%)和性别认同(71.6%).社会经济地位,种族/民族,和主要语言报告不到20%的参与者.随着时间的推移,报告的人口统计学变量的数量显示出略有增加的趋势,尽管多年来观察到相当大的变异性。这些发现表明,编辑和审稿人必须考虑什么构成可接受的参与者表征。研究人员也可能会大胆地将他们的工作扩展到目前在该杂志上代表性不足的人群。
    Recent reviews of behavior analytic journals suggest that participant demographics are inadequately described. These reviews have been limited to brief periods across several journals, emphasized specific variables (e.g., socioeconomic status), or only included specific populations. The current scoping review included all published articles in The Analysis of Verbal Behavior from 1982-2020. Six demographic variables were coded for 1888 participants across 226 articles. Despite small sample sizes (i.e., fewer than six participants in 62.3% of studies), only age (85.4%) and gender identity (71.6%) were reported for the majority of participants. Socioeconomic status, race/ethnicity, and primary language were reported for fewer than 20% of participants. Over time, the number of demographic variables reported showed a slight increasing trend, although considerable variability was observed across years. These findings suggest that editors and reviewers must consider what constitutes acceptable participant characterization. Researchers might also be emboldened to extend their work to populations currently underrepresented in the journal.
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  • 文章类型: Journal Article
    核苷酸糖(UDP-Sugars)对于药物中使用的多糖和糖缀合物的生产至关重要,化妆品,和食品工业。半乳糖-1-磷酸尿嘧啶基转移酶(GalU;EC2.7.7.12)负责从α-D-半乳糖-1-磷酸(Gal-1P)和UTP合成UDP-半乳糖。一种由嗜热细菌编码的新型细菌GalU(TiGalU),热脱硫剂indicus,在大肠杆菌中表达后,使用Ni-NTA柱成功纯化。重组TiGalU的最佳pH被确定为5.5。酶的最适温度为45℃。TiGalU的活性不依赖于Mg2,并被SDS强烈抑制。当与半乳糖激酶(GALK1)和β-1,4-半乳糖基转移酶1(B4GALT1)偶联时,该酶通过利用半乳糖和UTP作为底物实现了Gal-β-1,4-GlcNAc-X的一锅法合成。本研究首次报道了Gal-β-1,4-GlcNAc-X的体外生物合成,提供了一种环境友好的方式来生物合成糖苷和其他多糖。
    Nucleotide sugars (UDP-Sugars) are essential for the production of polysaccharides and glycoconjugates utilized in medicines, cosmetics, and food industries. The enzyme Galactose-1-phosphate uridylyltransferase (GalU; EC 2.7.7.12) is responsible for the synthesis of UDP-galactose from α-d-galactose-1-phosphate (Gal-1P) and UTP. A novel bacterial GalU (TiGalU) encoded from a thermophilic bacterium, Thermodesulfatator indicus, was successfully purified using the Ni-NTA column after being expressed in Escherichia coli. The optimal pH for recombinant TiGalU was determined to be 5.5. The optimum temperature of the enzyme was 45 °C. The activity of TiGalU was not dependent on Mg2+ and was strongly inhibited by SDS. When coupled with galactose kinase (GALK1) and β-1,4-galactosyltransferase 1 (B4GALT1), the enzyme enabled the one-pot synthesis of Gal-β-1,4-GlcNAc-X by utilizing galactose and UTP as substrates. This study reported the in vitro biosynthesis of Gal-β-1,4-GlcNAc-X for the first time, providing an environmentally friendly way to biosynthesis glycosides and other polysaccharides.
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  • 文章类型: Journal Article
    硬糖是主要包含水和蔗糖的糖食。玉米糖浆,着色剂和调味剂通常也添加到硬糖配方中。硬糖的生产需要将成分加热到非常高的温度以降低水分含量,随后冷却以获得固体基质。混合物的冷却实现了最终的,众所周知的玻璃态的产品。在这种玻璃状态下,该系统是动力学稳定的,分子迁移率受到限制,提供更长的保质期硬糖。有,然而,影响硬糖最终质量和消费者接受度的几个因素。生产方法和参数,初始配方以及储存条件都在物理化学中起着至关重要的作用,硬糖的质地和感官特性。着色剂和香料的添加在最终质量中也起着至关重要的作用。虽然硬糖生产是一个简单的过程,生产阶段很少,即使生产方法和工艺参数的微小变化也可能导致最终产品特性的实质性变化。此外,储存条件,如温度和湿度,可以改变产品的性质,导致粒化和粘性,这是储存期间硬糖的两个主要问题。因此,应仔细选择和控制生产和储存条件以获得所需的硬糖性质。本文介绍了一般的生产方法,并考虑了硬糖产品的工艺参数和质量参数。此外,还介绍了相关硬糖文献的全面回顾。大多数硬糖评论侧重于具体的方法和过程,但这次审查将提供一个更笼统的框架。
    Hard candies are sugar confections comprising mainly water and sucrose. Corn syrup, colorants and flavors are also usually added to hard candy formulations. The production of hard candy requires heating of the ingredients to very high temperatures to reduce moisture content and subsequent cooling to obtain a solid matrix. Cooling of the mixtures achieves the final, well known glassy state of the products. In this glassy state, the system is kinetically stable and molecular mobility is restricted, providing longer shelf life to hard candies. There are, however, several factors affecting the final quality and consumer acceptance of hard candies. Production methods and parameters, initial formulations as well as storage conditions all play a crucial role in the physicochemical, textural and sensory properties of hard candies. Addition of colorants and flavors also plays a vital role in the final quality. Although hard candy production is a simple process with few production stages, even small changes in the method of production and process parameters may induce substantial changes in the final product characteristics. Additionally, storage conditions such as temperature and humidity can change the product properties leading to graining and stickiness which are the two major problems for hard candies during storage. Both production and storage conditions should therefore be carefully chosen and controlled for desirable hard candy properties. This review addresses the general production methods and considers process parameters and quality parameters of hard candy products. Moreover, a comprehensive review of the related hard candy literature is also presented. The majority of hard candy reviews focus on specific methods and processes, but this review will present a more general frame on the subject.
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  • 文章类型: Journal Article
    近年来,生物金属纳米粒子(NPs)因其独特的性质和在不同领域的各种应用而受到广泛关注。NPs,包括黄金,银,氧化锌,铜,钛,和氧化镁NP,引起了相当大的兴趣。绿色合成方法,利用天然产品,提供可持续性和环境友好等优势。这些NP的治疗应用在医学和诊断领域具有巨大的意义。这篇综述探讨了复杂的细胞摄取途径,内化动力学,活性氧的产生,以及随之而来的炎症反应,揭示了在分子水平上控制它们行为的复杂机制。有趣的是,生物金属纳米粒子在医学上具有广泛的应用,包括但不限于抗炎,抗癌,抗糖尿病,抗疟原虫,抗病毒性能和自由基清除功效。他们在个性化医疗方面的潜力脱颖而出,专注于根据这些NP的独特属性和有针对性的输送能力为个体患者量身定制治疗。本文最终强调了生物金属NP在塑造个性化医疗格局中的作用。利用他们独特的特性为量身定制的疗法,诊断和有针对性的干预措施,这些NP为医疗保健的范式转变铺平了道路,有希望的增强疗效和减少不良反应。
    Biogenic metallic nanoparticles (NPs) have garnered significant attention in recent years due to their unique properties and various applications in different fields. NPs, including gold, silver, zinc oxide, copper, titanium, and magnesium oxide NPs, have attracted considerable interest. Green synthesis approaches, utilizing natural products, offer advantages such as sustainability and environmental friendliness. The theranostics applications of these NPs hold immense significance in the fields of medicine and diagnostics. The review explores intricate cellular uptake pathways, internalization dynamics, reactive oxygen species generation, and ensuing inflammatory responses, shedding light on the intricate mechanisms governing their behaviour at a molecular level. Intriguingly, biogenic metallic NPs exhibit a wide array of applications in medicine, including but not limited to anti-inflammatory, anticancer, anti-diabetic, anti-plasmodial, antiviral properties and radical scavenging efficacy. Their potential in personalized medicine stands out, with a focus on tailoring treatments to individual patients based on these NPs\' unique attributes and targeted delivery capabilities. The article culminates in emphasizing the role of biogenic metallic NPs in shaping the landscape of personalized medicine. Harnessing their unique properties for tailored therapeutics, diagnostics and targeted interventions, these NPs pave the way for a paradigm shift in healthcare, promising enhanced efficacy and reduced adverse effects.
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  • 文章类型: Journal Article
    生物启发的氧化锌纳米颗粒由于其安全性而获得了巨大的兴趣,低成本,生物相容性,和广泛的生物学特性。近年来,许多研究都集中在基于植物的纳米粒子上,主要是为了他们的环保,轻而易举,无毒特性。因此,目前的研究强调了从番石榴水叶提取物中自下而上合成氧化锌纳米颗粒(ZnONPs)并评估其生物学特性。使用各种分析方法证实了生物合成ZnONPs的结构特征,如紫外可见光谱,X射线衍射(XRD)能量色散X射线分析(EDX),傅里叶变换红外光谱(FT-IR),动态光散射(DLS),扫描电子显微镜(SEM)和高分辨率透射电子显微镜(HR-TEM)。合成的ZnONP表现出流体动力学形状,平均粒径为11.6-80.2nm。粪肠球菌的最低抑菌浓度(MIC)和最低杀菌浓度(MBC)分别为40和27µg/ml,具有显着的抗菌效率,然后是金黄色葡萄球菌30和40微克/毫升,20和30微克/毫升的变异葡萄球菌,通过ZnONP观察到白色念珠菌为30µg/ml。此外,他们显示变形链球菌和白色念珠菌生物膜的显著分解,表明其在耐药性研究中的未来价值.此外,注意到抗氧化性能的优异剂量依赖性活性,IC50为9.89µg/ml。MDAMB231细胞的活力表明ZnONP的抗增殖潜力,这表明响应于生物合成的ZnONP浓度的增加而急剧下降。因此,本研究结果为未来开发靶向抗癌药物开辟了前景。
    Bio-inspired zinc oxide nanoparticles are gaining immense interest due to their safety, low cost, biocompatibility, and broad biological properties. In recent years, much research has been focused on plant-based nanoparticles, mainly for their eco-friendly, facile, and non-toxic character. Hence, the current study emphasized a bottom-up synthesis of zinc oxide nanoparticles (ZnO NPs) from Psidium guajava aqueous leaf extract and evaluation of its biological properties. The structural characteristic features of biosynthesized ZnO NPs were confirmed using various analytical methods, such as UV-Vis spectroscopy, X-ray diffraction (XRD), energy-dispersive X-ray analysis (EDX), Fourier transform infrared spectroscopy (FT-IR), dynamic light scattering (DLS), Scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HR-TEM). The synthesized ZnO NPs exhibited a hydrodynamic shape with an average particle size of 11.6-80.2 nm. A significant antimicrobial efficiency with minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of 40 and 27 µg/ml for Enterococcus faecalis, followed by 30 and 40 µg/ml for Staphylococcus aureus, 20 and 30 µg/ml for Staphylococcus mutans, 30 µg/ml for Candida albicans was observed by ZnO NPs. Additionally, they showed significant breakdown of biofilms of Streptococcus mutans and Candida albicans indicating their future value in drug-resistance research. Furthermore, an excellent dose-dependent activity of antioxidant property was noticed with an IC50 of 9.89 µg/ml. The antiproliferative potential of the ZnO NPs was indicated by the viability of MDA MB 231 cells, which showed a drastic decrease in response to increased concentrations of biosynthesized ZnO NPs. Thus, the present results open up vistas to explore their pharmaceutical potential for the development of targeted anticancer drugs in the future.
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  • 文章类型: Journal Article
    皮肤癌是指特征在于非典型皮肤细胞以不受控制的方式增殖的病理状况。植物性产品,如必新,虽然显示有希望的抗癌特性,但是在配方中保持它们的稳定性是一项艰巨的任务。本研究的目的是制备一种银纳米粒子凝胶制剂,并评价其抗癌性能。
    通过热提取技术制备了BixaOrellana种子的提取物,以分离活性成分,比辛。采用绿色合成方法制备了Bixin银纳米粒子凝胶(BOAgNPs)。使用FTIR对银纳米粒子进行了表征,扫描电子显微镜,相容性研究,同质性测试,pH评估,和药物含量测定。使用细胞系(B16F10)进行体外抗癌活性,并在小鼠体内通过化学致癌物(7,12-二甲基苯并(a)蒽)进行体内抗癌活性。
    发现负载BOAgNPs的外用凝胶与皮肤均匀(透明橙色)且pH相容(pH≈6.66)。表征研究表明制剂中存在所有官能团。当与参考药物等同时,优化的一批Bixin-nanogel对B16F10细胞系(体外活性)的抑制作用约为60%,5-氟尿嘧啶.体内抗癌研究表明,通过在皮肤上应用Bixin-nano凝胶可以抑制肿瘤发生并促进愈合过程。
    结果表明,当配制在银纳米颗粒凝胶中时,必新的抗癌性能很有希望。用Bixin制备银颗粒纳米凝胶可能为治疗皮肤癌提供有效的替代选择,提供了更多的研究补充了本研究的发现。
    UNASSIGNED: Skin cancer refers to the pathological condition characterized by the proliferation of atypical skin cells in an uncontrolled manner. Plant-based products such as bixin although show promising anticancer properties, but maintaining their stability in a formulation is a difficult task. The objective of the research is to formulate a silver nanoparticle gel preparation of bixin and evaluate its anticancer properties.
    UNASSIGNED: The extract from Bixa orellana seed was prepared by hot extraction technique to isolate the active ingredient, bixin. A green synthesis approach was utilized for preparing the silver nanoparticle gel of bixin (BOAgNPs). Characterization of silver nanoparticles was done using FTIR, scanning electron microscopy, compatibility study, homogeneity testing, pH evaluation, and drug content determination. The in-vitro anticancer activity was performed using cell lines (B16F10) and in-vivo by chemical carcinogen (7,12-dimethylbenz (a) anthracene) in mice.
    UNASSIGNED: The BOAgNPs-loaded topical gel was found to be homogeneous (clear orange color) and pH-compatible (pH ≈ 6.66) with the skin. The characterization studies indicated the presence of all functional groups in the formulation. An optimized batch of bixin-nano gel showed about 60% inhibitory effects on B16F10 cell lines (in-vitro activity) when equated with a reference drug, 5-fluorouracil. The in-vivo anticancer study suggested suppression of tumorigenesis and promotion of the healing process with bixin-nano gel application on the skin.
    UNASSIGNED: The results suggested the promising anticancer property of bixin when formulated in silver nanoparticle gel. The preparation of silver particles nano gel with bixin might provide an effective alternative option for treating skin cancers, provided more research complements the findings of the present study.
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