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Investigation on the Potential of Some N-phenylalkanehydrazides as Superoxide Anion Radical Scavengers and Glutathione Peroxidase Binderswith ADME Prediction: Comparison with Vitamin C 关于某些 N-苯基烷酰肼作为超氧阴离子自由基清除剂和谷胱甘肽过氧化物酶粘合剂的潜力的研究以及 ADME 预测:与维生素 C 的比较
Q2 Pharmacology, Toxicology and Pharmaceutics Pub Date : 2024-07-22 DOI: 10.2174/0115734072325272240712114444
H. Mouada, T. Lanez
An investigation on the antioxidant activity and ADME properties of someN-phenylalkanehydrazides (NPhs) in comparison with ascorbic acid was carried out.The power of the compounds to scavenge the superoxide anion radicalwas examined using cyclic voltammetry. Furthermore, molecular docking was used to examinehow NPhs bind to the antioxidant enzyme glutathione peroxidase (GPx). Finally, ADME propertieswere predicted using the SwissADME webserver.The results showed that the studied compounds had significantly higher EC50 values thanVitamin C and displayed spontaneous binding with GPx with binding energy similar to ascorbicacid. Also, substantial values emerged from the predictive analysis of drug-likeness and bioavailabilitycharacteristics.First, the EC50 of the compounds under study was determined by assessing the decreasein the anodic current peak intensity; this demonstrated significant radical scavenging activity.Next, the electrostatic way of binding with ROS radical and with antioxidant enzyme wasdisclosed by the binding free energies; however, the oxygen and nitrogen atoms in the compounds'structures might make many conventional hydrogen bonds with amino acids. Finally,NPh (a) followed all the rules for drug-likeness and bioavailability estimates, making it a promisingmoiety for synthesising new antioxidant chemicals.The current study is a hybrid of experimental and computational methods that complementeach other perfectly.
与抗坏血酸相比,研究人员对一些N-苯基烷酰肼(NPhs)的抗氧化活性和ADME特性进行了调查,并使用循环伏安法检测了这些化合物清除超氧阴离子自由基的能力。此外,还使用分子对接法研究了 NPhs 如何与抗氧化酶谷胱甘肽过氧化物酶(GPx)结合。结果表明,所研究的化合物的 EC50 值明显高于维生素 C,并显示出与 GPx 的自发结合,结合能量与抗坏血酸相似。首先,通过评估阳极电流峰值强度的下降确定了所研究化合物的 EC50 值,这表明其具有显著的自由基清除活性;其次,通过结合自由能揭示了与 ROS 自由基和抗氧化酶的静电结合方式;然而,化合物结构中的氧原子和氮原子可能会与氨基酸形成许多常规氢键。最后,NPh (a)符合药物相似性和生物利用度估计的所有规则,使其成为合成新型抗氧化化学物质的一个有前途的品种。
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引用次数: 0
Chemistry or Hypoglycaemic Aspect of Thiazolidin-2,4-Dione Insight intothe Structure-activity Relationship 噻唑烷-2,4-二酮的化学或降血糖作用对结构-活性关系的启示
Q2 Pharmacology, Toxicology and Pharmaceutics Pub Date : 2024-06-12 DOI: 10.2174/0115734072316442240603061608
Parvinder Kaur, Nitin Kumar, Shikha Sharma, B. Banik
Heterocyclic compounds that incorporate nitrogen and sulfur, particularly those withinthe thiazole family, have garnered significant attention due to their versatile synthetic properties.This interest arises from their abundance of biologically active natural products and their effectivenessas potent agrochemicals and pharmaceuticals. Among these, the thiazolidin-2,4-dione(TZD) motif plays a pivotal role in the biological functions of many important molecules. Theadaptability of the TZD scaffold is further heightened by the potential for substitutions at the thirdand fifth positions, rendering it a widely employed moiety with diverse biological effects. TZDanalogs, bearing substitutions at these positions, exhibit a wide spectrum of biological activities,with a notable emphasis on hypoglycemic effects attributed to enhanced insulin resistancethrough the activation of the PPAR-γ receptor. This manuscript aims to present a comprehensivereview of research conducted on TZD derivatives as potential antihyperglycemic agents spanningfrom 2010 to the current date. The review encompasses insights into their molecular mechanisms.Thiazolidin-based chemicals have received significant attention as hypoglycemic agents and providedinformation on patents granted for TZD analogs.
含有氮和硫的杂环化合物,尤其是噻唑家族的杂环化合物,因其多用途的合成特性而备受关注。其中,噻唑啉-2,4-二酮(TZD)基团在许多重要分子的生物功能中发挥着关键作用。TZD 支架的适应性因第三位和第五位的潜在取代而进一步提高,使其成为具有多种生物效应的广泛应用分子。在这些位置上发生取代的 TZD 类似物具有广泛的生物活性,尤其是通过激活 PPAR-γ 受体增强胰岛素抵抗力而产生的降血糖作用。本手稿旨在对 2010 年至今有关 TZD 衍生物作为潜在降血糖药物的研究进行全面综述。噻唑烷类化学品作为降血糖药物受到了广泛关注,并提供了有关 TZD 类似物专利的信息。
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引用次数: 0
Unveiling the Potential of Piper cubeba L. f.: A ComprehensiveReview Covering its Phytochemistry, Pharmacology, and Cutting-edgeApplications 揭示 Piper cubeba L. f. 的潜力:涵盖其植物化学、药理学和前沿应用的全面综述涵盖其植物化学、药理学和前沿应用的全面综述
Q2 Pharmacology, Toxicology and Pharmaceutics Pub Date : 2024-06-11 DOI: 10.2174/0115734072310948240529112415
Sonia Singh, Khushi Sharma
Cubeb, often referred to as Piper cubeba (Piperaceae), has a long history in traditionalherbal medicine, particularly in the management of digestive and respiratory disorders. The plantis a valuable source of essential oils, which are very important economically and are mostly foundin its fruits. Recent research has validated many of the traditional applications and their bioactivecomponents, highlighting their antibacterial, antioxidant, anticancer, and anti-inflammatory properties.This article presents a contemporary summary of bioactive compounds and the pharmacologicalproperties of plants. It also explores the potential of plant P. cubeba for future applicationsin promoting health and nutrition.
古巴簕杜鹃通常被称为胡椒科(Piper cubeba),在传统草药中有着悠久的历史,尤其是在治疗消化系统和呼吸系统疾病方面。该植物是一种宝贵的精油来源,具有非常重要的经济价值,主要存在于其果实中。最近的研究验证了植物的许多传统应用及其生物活性成分,强调了它们的抗菌、抗氧化、抗癌和抗炎特性。本文对植物的生物活性化合物和药理特性进行了当代总结,并探讨了立巴仙人掌在未来应用于促进健康和营养方面的潜力。
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引用次数: 0
Cucurbitacin: Unveiling its Role as Phytomolecule in Health Benefits 葫芦素:揭示其作为植物大分子在健康益处中的作用
Q2 Pharmacology, Toxicology and Pharmaceutics Pub Date : 2024-06-07 DOI: 10.2174/0115734072316509240530044415
Reshmi Paul, Sourav Nag, Sumanta Mondal, Naresh Panigrahi, Partha Roy, Santosh Kumar Sahoo, Raja S, Abu Mohiuddin
In recent scientific studies, a variety of phytochemicals, including carotenoids,polyphenols, isoprenoids, phytosterols, saponins, and dietetic fibers, besides polysaccharides,have been linked to beneficial health effects, which include reducing the risk of diabetes, obesity,and cancer, cardiovascular diseases, and other conditions. Squash, pumpkin, cucumber, andmelons are just a few examples of the Cucurbitaceae family plants that contain cucurbitacins,highly oxygenated tetracyclic triterpenes. Since ancient times, various traditional remedies havebeen made from plants that contain cucurbitacins. Several cucurbitacins (A, B, C, D, E, F, G, I, J,K, L, O, P, Q, R, S) have an extensive assortment of bioactivities, including hepatoprotectiveactivity, liver protection, anticancer, anti-inflammatory, antiviral, and anti-diabetic properties.Cucurbitacins, for instance, have a well-known anticancer effect. Specific reports suggest thatcucurbitacins stimulate apoptosis via the JAK/STAT3 pathway. Through cyclin inhibition,cucurbitacins may inhibit the cell cycle. Besides, they expedite autophagy while preventingcancer cells from migrating and infecting other tissues. Cucurbitacins have been categorized assignal transducers and activators of transcription. It is soundly acknowledged that the plant-basedcompound cucurbitacin B (CuB) has insecticidal and repellent properties. CuB has been shown tohave non-specific toxicity and limited bioavailability in studies evaluating its toxicity andpharmacokinetic characteristics. Hence, we aimed to concentrate on the numerous properties ofcucurbitacins in this article, including their chemistry, an analysis of biosynthesis, several typesof bioactivities, and studies on their toxicity.
在最近的科学研究中,各种植物化学物质,包括类胡萝卜素、多酚、异丙烯酸、植物甾醇、皂苷、膳食纤维以及多糖,都与有益健康的作用有关,其中包括降低患糖尿病、肥胖症、癌症、心血管疾病和其他疾病的风险。南瓜、黄瓜和西瓜只是葫芦科植物中含有葫芦素(高含氧四环三萜)的几个例子。自古以来,各种传统疗法都是从含有葫芦素的植物中提取的。几种葫芦素(A、B、C、D、E、F、G、I、J、K、L、O、P、Q、R、S)具有广泛的生物活性,包括保肝活性、护肝、抗癌、抗炎、抗病毒和抗糖尿病特性。具体报告表明,葫芦素通过 JAK/STAT3 途径刺激细胞凋亡。通过抑制细胞周期蛋白,葫芦素可以抑制细胞周期。此外,它们还能加速自噬,同时防止癌细胞迁移和感染其他组织。葫芦素被归类为转录转换器和激活剂。众所周知,以植物为基础的化合物葫芦素 B(CuB)具有杀虫和驱虫特性。在对 CuB 的毒性和药代动力学特性进行评估的研究中,发现其具有非特异性毒性和有限的生物利用度。因此,本文旨在集中讨论葫芦素的众多特性,包括其化学性质、生物合成分析、几种生物活性以及对其毒性的研究。
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引用次数: 0
Influence of Parameters of Mechanochemical Processing on the Efficacy of Complex Solid Dispersion of Anthelmintics 机械化学处理参数对复合杀虫剂固体分散体药效的影响
Q2 Pharmacology, Toxicology and Pharmaceutics Pub Date : 2024-06-07 DOI: 10.2174/0115734072303357240528095424
A. Varlamova, S. Khalikov, I. Arkhipov, M. Arisov, K. Sadov, Michael M. Ilyin
Due to the fact that animal parasitic diseases often occur in the formof mixed infections, it is necessary to use complex drugs with a combination of active substancesthat act against different classes of helminths. Fenbendazole has a wide spectrum of nematocidalaction and is less effective against cestodes. Considering that sheep are often infected withboth gastro-intestinal nematodes and cestodes, a complex drug based on fenbendazole,niclosamide with polyvinylpyrrolidone polymer, was developed using mechanochemicaltechnology in order to increase its solubility and bioavailability and reduce the dosages and sideeffects.This study aimed to evaluate the influence of mechanochemical technology on the efficacyof complex solid dispersions of anthelmintics against cestodoses and nematodoses.The influence of different types of mills (roller and planetary mills), levels of energyintensity (20, 40, 60 g), and component ratio (2:20:78; 3:30:67; 4:40:56) during mechanochemicalprocessing was studied on the anthelmintic efficacy of complex solid dispersions of fenbendazole,niclosamide, and polyvinylpyrrolidone in laboratory models of trichinellosis and hymenolepiosisof white mice, and on sheep naturally infected with helminths.The efficacy of complex solid dispersions obtained in the planetary mill was higher thanthe activity of dispersions obtained in a roller mill. It showed 87.5, 96.36, 83.77, and 99.39% efficacy,respectively, against experimental trichinellosis, hymenolepiosis of white mice, gastrointestinalnematode infection and monieziosis of sheep at a ratio of 2:20:78. The basic drug –fenbendazole demonstrated 31.37 and 22.77% activity against experimental trichinellosis andgastro-intestinal nematode infection of sheep. The basic drug, niclosamide, showed 36.37% efficacyagainst hymenolepiosis in mice and 28.31% against monieziosis in sheep. It was establishedthat with an increase in the energy intensity level of the planetary mill (20, 40, and 60 g), the decreasein the efficacy of solid dispersion occurred from 73.90 to 59.12% against T. spiralis andfrom 92.73% to 79.81% against H. nana.The use of mechanochemical technology for the production of solid dispersionsof fenbendazole and niclosamide with polyvinylpyrrolidone makes it possible to increase theanthelmintic efficacy by 2.7–3 times compared to the activity of basic substances. It wasnoted that the complex solid dispersions of anthelmintics obtained in a planetary mill had7.51–10.17% greater activity in comparison with the samples obtained in a roller mill. The mostoptimal ratio of active substances was 2:20:78 at a 20 g level of energy intensity of the planetarymill.
由于动物寄生虫病常常以混合感染的形式出现,因此有必要使用复合药物,将对不同种类蠕虫起作用的活性物质组合在一起。芬苯达唑的杀线虫作用范围很广,但对绦虫的作用较弱。考虑到绵羊经常同时感染胃肠道线虫和绦虫,我们利用机械化学技术开发了一种基于芬苯达唑、烟酰胺和聚乙烯吡咯烷酮聚合物的复方药物,以增加其溶解度和生物利用度,并减少用量和副作用。研究了不同类型的研磨机(辊式研磨机和行星式研磨机)、能量强度水平(20、40、60 克)和机械化学处理过程中的组分比例(2:20:78;3:30:67;4:40:56)对芬苯达唑、烟酰胺和聚乙烯吡咯烷酮复合固体分散体在白鼠旋毛虫病和膜孔虫病实验室模型以及自然感染蠕虫的羊身上的驱虫效力的影响。用行星磨获得的复合固体分散体的效力高于用辊磨获得的分散体。按 2:20:78 的比例计算,它对实验性旋毛虫病、白鼠膜孔虫病、绵羊胃肠道线虫感染和单核细胞增多症的有效率分别为 87.5%、96.36%、83.77%和 99.39%。基本药物芬苯达唑对实验性毛滴虫病和绵羊胃肠线虫感染的活性分别为 31.37% 和 22.77%。基本药物烟酰胺对小鼠膜包虫病的有效率为 36.37%,对绵羊单核细胞增多症的有效率为 28.31%。研究表明,随着行星磨的能量强度水平(20、40 和 60 克)的增加,固体分散体对螺旋蓟马的药效从 73.90% 降至 59.12%,对绵羊花叶病毒的药效从 92.73% 降至 79.81%。使用机械化技术生产芬苯达唑和烟酰胺与聚乙烯吡咯烷酮的固体分散体,可使驱虫效力比基本物质的活性提高 2.7-3 倍。结果表明,用行星磨获得的抗蠕虫药复合固体分散体的活性比用辊磨获得的样品高 7.51-10.17%。在行星式粉碎机的能量强度为 20 克时,活性物质的最佳比例为 2:20:78。
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引用次数: 0
Design, Synthesis, In vitro Antimicrobial and Antioxidant Evaluation ofNovel Pyrimidine Derivatives 新型嘧啶衍生物的设计、合成、体外抗菌和抗氧化评估
Q2 Pharmacology, Toxicology and Pharmaceutics Pub Date : 2024-06-06 DOI: 10.2174/0115734072301970240528053901
Kaushal Arora, Prabhakar Kumar Verma
In this study, a new series of 2-amino-6-(substituted)pyrimidin-4-yl-2Hchromen-2-one analogues (S1-S15) was prepared by using the Knovengeal condensation methodand evaluated for antimicrobial as well as antioxidant activity.To ensure the progress and confirmation of the reactions, TLC was employed. The meltingpoints (MP) were ascertained utilising a Sunbim-made sonar melting point device produced in India.To confirm the chemical structures of these compounds, we employed a range of techniques, includingFT-IR, MS, 1H-NMR, and Elemental analysis. The antimicrobial and antifungal activity wasevaluated using the tube dilution method, and a DPPH assay was used to assess antioxidant activity.Within the series, S1 demonstrated strong antibacterial efficacy against S. Aureus, with a minimum inhibitory concentration value of 16.26μg/ml, while compound S7 displayed significant potential against B. subtilis and E. coli, with a MIC value of 17.34μg/ml. For antifungal activity, compounds S7 and S11 are the most potent against A. niger, showing a minimum inhibitory concentration of 17.34μg/ml. In the evaluation of antioxidant activity, it was observed that compounds S2 and S4 displayed outstanding antioxidant properties, with IC50 values of 13.33μg/ml and 43.13μg/ml.The newly created derivatives exhibited robust antimicrobial and antioxidant characteristicsupon assessment through designated methodologies, surpassing the efficacy of conventionaldrugs in the comparative analysis. Notably, compounds S1, S2, S7, S4, and S11 exhibited evengreater activity than the reference drugs. Their structure-activity relationship was also discussed.
本研究采用 Knovengeal 缩合法制备了一系列新的 2-氨基-6-(取代)嘧啶-4-基-2H-苯并吡喃-2-酮类似物(S1-S15),并对其抗菌和抗氧化活性进行了评估。为了确认这些化合物的化学结构,我们采用了一系列技术,包括FT-IR、MS、1H-NMR 和元素分析。在这一系列化合物中,S1 对金黄色葡萄球菌具有很强的抗菌效果,最低抑菌浓度为 16.26μg/ml;化合物 S7 对枯草杆菌和大肠杆菌具有显著的抗菌潜力,最低抑菌浓度为 17.34μg/ml。在抗真菌活性方面,化合物 S7 和 S11 对黑僵菌的作用最强,最低抑制浓度为 17.34μg/ml。在评估抗氧化活性时,发现化合物 S2 和 S4 显示出突出的抗氧化特性,其 IC50 值分别为 13.33μg/ml 和 43.13μg/ml。通过指定方法进行评估后,新生成的衍生物显示出强大的抗菌和抗氧化特性,在比较分析中超过了常规药物的功效。值得注意的是,化合物 S1、S2、S7、S4 和 S11 甚至比参考药物表现出更高的活性。此外,还讨论了它们的结构-活性关系。
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引用次数: 0
Recent Advances in Chemistry and Biological Activity of Sulphonamides 磺胺类药物化学和生物活性的最新进展
Q2 Pharmacology, Toxicology and Pharmaceutics Pub Date : 2024-06-04 DOI: 10.2174/0115734072310728240528071149
Mahmoud N. M. Yousif
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引用次数: 0
Application of Nanotechnology as a Novel Approach to the Treatment ofSkin Cancer 应用纳米技术治疗皮肤癌的新方法
Q2 Pharmacology, Toxicology and Pharmaceutics Pub Date : 2024-05-20 DOI: 10.2174/0115734072320056240513054917
Sonia Singh, Aman Gupta, Mahima Varshney
Skin cancer has become the fifth most frequently reported form of cancer worldwide,imposing significant economic and public health challenges. Over the course of the last ten years,there has been a significant increase in the application of Nanoparticles (NPs) as a method oftherapeutic administration to target skin cancer. The information has been gathered from manyonline databases, such as Scopus, Pubmed, Science Direct, and Web of Science, among others.An analysis of research articles that focused on the therapeutic effect of nanoformulations on skincancer was included as part of the criteria for selecting the study. Nanoparticles have the potentialto change the pharmacokinetics of the drug, increase the drug’s half-life by lowering immunogenicity,increase its bioavailability, decrease drug metabolism, and improve the solubility of poorlywater-soluble drugs. The distribution of NP-based treatments to the skin requires special considerationdue to the fact that the skin acts as both a physical and immunologic barrier. In addition,specialized technologies must take into consideration not only the target but also the channel ofadministration in order to be effective. The purpose of this review article was to provide an overviewof many types of NPs, address the current landscape of NPs for skin cancer prevention andtreatment, and provide a description of the application of NP-based technologies for drug deliverytargeting the skin.
皮肤癌已成为全球第五大高发癌症,给经济和公共卫生带来了巨大挑战。在过去十年中,纳米粒子(NPs)作为一种针对皮肤癌的治疗方法的应用显著增加。这些信息是从 Scopus、Pubmed、Science Direct 和 Web of Science 等许多在线数据库中收集的,对侧重于纳米制剂对皮肤癌的治疗效果的研究文章进行分析是选择研究的标准之一。纳米颗粒有可能改变药物的药代动力学,通过降低免疫原性延长药物的半衰期,增加生物利用度,降低药物代谢,以及提高水溶性差的药物的溶解度。由于皮肤既是物理屏障,又是免疫屏障,因此需要特别考虑将基于 NP 的治疗分配到皮肤上。此外,专门的技术不仅要考虑目标,还要考虑给药渠道,这样才能有效。这篇综述文章的目的是概述多种类型的 NPs,探讨当前 NPs 在皮肤癌预防和治疗中的应用前景,并介绍基于 NP 的皮肤靶向给药技术的应用。
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引用次数: 0
Anti-carcinogenic Potential of Nano-curcumin -“Killing Cancerous Cells” 纳米姜黄素的抗癌潜力--"杀死癌细胞"
Q2 Pharmacology, Toxicology and Pharmaceutics Pub Date : 2024-05-15 DOI: 10.2174/0115734072294675240502065442
Mohsin Ali Khan, Anwar Khan, Akhlak Ahmed Khan, Simrah, Mohd. Aamir Mirza, Kamran Javed Naquvi, Devendra Kumar
Nowadays, cancer treatment is currently limited to surgery, chemotherapy, and radiation,which carry the risk of damaging the normal tissue of the body and incomplete removal ofthe cancerous cells from the body. Thus, the Nano technique offers a great means to target therapiesdirectly on cancerous cells and neoplasm. Moreover, because nano-based formulations ofpolyphenolic curcumin show a major effect on cancer and tumour cells, nanoparticles have a tendencyto overcome the hydrophobic nature of curcumin to improve its stability and bioavailabilityin vitro and in vivo. It is apparent from the studies that Curcumin has shown anticancer effects byregulating various immunomodulators, which include cytokines, reactive oxygen species, andcyclooxygenase-2 (COX-2). It also takes part in the downregulation of growth factors, proteinkinases, oncogenic molecules, and various signalling pathways, such as nuclear factor kappalight-chain enhancer of activated B cells (NF-κB), c-Jun N-terminal kinase (JNK), and signaltransducer and activator of transcription 3 (STAT3) signalling. According to recent studies andclinical trials, nano curcumin shows a major effect on cancerous cells. In this article, the authorssummarised the mechanism of nano curcumin in various metastatic cancers and the most recentclinical trials performed.
目前,癌症的治疗方法仅限于手术、化疗和放疗,但这些方法都有可能损伤人体正常组织,而且不能完全清除体内的癌细胞。因此,纳米技术为直接针对癌细胞和肿瘤的治疗提供了一个很好的手段。此外,由于多酚姜黄素的纳米制剂对癌细胞和肿瘤细胞有重大作用,因此纳米颗粒有克服姜黄素疏水性的趋势,以提高其在体外和体内的稳定性和生物利用度。研究表明,姜黄素通过调节各种免疫调节剂(包括细胞因子、活性氧和环氧化酶-2 (COX-2))而显示出抗癌作用。它还参与下调生长因子、蛋白inkinases、致癌分子和各种信号通路,如活化 B 细胞的核因子 kappalight-chain 增强子(NF-κB)、c-Jun N 端激酶(JNK)和信号转导和激活转录 3(STAT3)信号。根据最近的研究和临床试验,纳米姜黄素对癌细胞有重大作用。在本文中,作者总结了纳米姜黄素在各种转移性癌症中的作用机制以及最新的临床试验。
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引用次数: 0
Chemical Profile with Antibacterial and Modulatory Activity of Extracts from the Stem Bark of Cnidoscolus quercifolius Pohl. Cnidoscolus quercifolius Pohl 茎皮提取物的抗菌和调节活性化学成分简介
Q2 Pharmacology, Toxicology and Pharmaceutics Pub Date : 2024-05-13 DOI: 10.2174/0115734072297726240430040317
Joice Barbosa do Nascimento, José Walber Gonçalves Castro, Maria Inácio da Silva, José Jonas Ferreira Viturino, Mariana Pereira da Silva, Ana Cecilia Calixto Donelardy, Johnatan Wellisson da Silva Mendes, Fabíola Fernandes Galvão Rodrigues, José Galberto Martins da Costa
The present study aimed to investigate the chemical profile and evaluate theantibacterial and antibiotic-modulating activity of the methanolic extract and ethyl acetate of thestem bark of C. quercifolius against standard and multiresistant strains.The Minimum Inhibitory Concentration was determined by the microdilution method,and the modulating potential of the extracts on aminoglycoside and β-lactam antibiotics wasevaluated.The classes of secondary metabolites identified from qualitative chemical prospectingwere flavones, flavonols, xanthones, flavonones, flavonols, catechins and leucoanthocyanidins.The assays showed inhibition only for Klebsiella pneumoniae-producing extended-spectrum β-lactamase, Klebsiella pneumoniae carbapenemase and Escherichia coli ATCC 25922 with MICsof 256, 512 and 512 μg/mL, respectively. The extracts, when associated with gentamicin andamoxicillin, showed synergism against all standard and multiresistant strains, with the exceptionof Klebsiella pneumoniae carbapenemase and Klebsiella pneumoniae producing extendedspectrumβ-lactamase, respectively. When combined with amikacin, they also demonstrated synergismagainst multidrug-resistant strains; however, only the ethyl acetate extract had a synergisticeffect against E. coli ATCC 25922. The association of penicillin with methanolic extractshowed synergism only for Klebsiella pneumoniae producing extended-spectrum β-lactamase andS. aureus ATCC 29213, while the ethyl acetate extracts demonstrated synergism against S. aureusand Klebsiella pneumoniae producing extended-spectrum β-lactamase.It was found that C. quercifolius extracts have antibacterial potential against gramnegativebacteria. However, the need for additional research using specific methods against bacteriacarrying different resistance mechanisms, especially gram-positive ones, is highlighted, withthe aim of elucidating their mechanism of action.The species was found to have substances with potential against Gram-negative bacteria. However, the need for additional research using specific methods against bacteria carrying different resistance mechanisms, especially Gram-positive ones, is highlighted, with the aim of elucidating their mechanism of action.
本研究旨在研究槲寄生茎皮甲醇提取物和乙酸乙酯的化学成分,并评估其对标准菌株和多重耐药菌株的抗菌和抗生素调节活性。实验结果表明,该提取物仅对产生广谱β-内酰胺酶的肺炎克雷伯菌、肺炎克雷伯菌碳青霉烯酶和大肠埃希菌 ATCC 25922 有抑制作用,抑制浓度分别为 256、512 和 512 μg/mL。这些提取物与庆大霉素和阿莫西林合用时,对所有标准菌株和多重耐药菌株都有协同作用,但肺炎克雷伯菌碳青霉烯酶和产生广谱β-内酰胺酶的肺炎克雷伯菌除外。当与阿米卡星联合使用时,它们还对耐多药菌株产生协同作用;然而,只有乙酸乙酯提取物对大肠杆菌 ATCC 25922 具有协同作用。青霉素与甲醇提取物的结合仅对产生广谱β-内酰胺酶的肺炎克雷伯菌和金黄色葡萄球菌 ATCC 29213 有协同作用,而乙酸乙酯提取物对金黄色葡萄球菌和产生广谱β-内酰胺酶的肺炎克雷伯菌有协同作用。不过,需要使用特定方法对携带不同抗药性机制的细菌(尤其是革兰氏阳性菌)进行进一步研究,以阐明其作用机制。不过,该物种还需要使用特定方法对携带不同抗药性机制的细菌(尤其是革兰氏阳性细菌)进行进一步研究,以阐明其作用机制。
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Current Bioactive Compounds
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