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2005 Asian Conference on Sensors and the International Conference on New Techniques in Pharmaceutical and Biomedical Research最新文献

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The Pharmacological and Toxicological Effects of Amygdalin: A Review Study 苦杏仁苷的药理和毒理学作用综述
Parisa Saberi Hasanabadi, F. Shaki
Background: Amygdalin has many pharmacological activities, such as analgesic and antiasthmatic effects. Although several studies supported the cytotoxic effects of amygdalin on different cancer cell lines, no general agreement has been reached on the anticancer aspect of amygdalin. Objectives: This review aims to focus on the pharmacological and toxicological effects of amygdalin and provide a reference and perspective for further investigation. Methods: Electronic databases, including the Web of Science, PubMed, Google Scholar, and ScienceDirect, were searched to identify eligible studies on the pharmacological and toxicological effects of amygdalin and provide a reference and perspective for further investigation. Totally, 90 papers about in vitro or in vivo studies on amygdalin have been reviewed. Results: Pharmacological activities of amygdalin have been well documented over the years; however, in some cases, dose-dependent toxicity has been reported in the human body. Since the acute toxicity of oral administration of amygdalin is far greater than the intravenous route, several in vitro and in vivo studies are needed to assess the amygdalin’s pharmacological value for the induction of apoptosis and anticancer effects. Conclusion: Amygdalin generally has dose-dependent effects. It has positive or desirable effects at lower doses and undesirable impact at a higher intake level. However, there are substantial inter-individual variations.
背景:苦杏仁苷具有镇痛、平喘等药理作用。虽然有几项研究支持苦杏仁苷对不同癌细胞系的细胞毒性作用,但对苦杏仁苷的抗癌作用尚未达成普遍共识。目的:综述苦杏仁苷的药理和毒理学作用,为进一步研究提供参考和视角。方法:检索Web of Science、PubMed、Google Scholar、ScienceDirect等电子数据库,筛选符合条件的有关苦杏仁苷药理和毒理学作用的研究,为进一步研究提供参考和视角。本文综述了有关苦杏仁苷体内、体外研究的相关文献90篇。结果:多年来,苦杏仁苷的药理作用已被证实;然而,在某些情况下,已报道了人体剂量依赖性毒性。由于口服苦杏仁苷的急性毒性远大于静脉给药,因此需要进行一些体外和体内研究来评估苦杏仁苷在诱导细胞凋亡和抗癌作用方面的药理价值。结论:苦杏仁苷具有剂量依赖性。它在低剂量下有积极或理想的效果,而在高剂量下则有不良影响。然而,个体之间存在着很大的差异。
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引用次数: 2
Determination of Caffeine, Total Phenol, and Heavy Metals Content in Green and Black Tea Collected From Gilan Province, Iran by spectroscopic method 光谱法测定伊朗吉兰省绿茶和红茶中咖啡因、总酚和重金属含量
M. Shokrzadeh, M. Hosseinzadeh, Mansoureh Boustani, E. Habibi
Background: Because of its stimulating and valuable effects, tea is the most commonly used beverage in the world after water. These effects are due to caffeine and phenolic compounds in tea. Also, most of the tea in Iran is planted in Gilan Province. However, food pollution from heavy metals is one of the most important problems. Objectives: In this research, we measured the total phenolic content, caffeine, lead, cadmium, and chromium in green and black tea cultivated in Gilan Province. Methods: Ten samples of green and black tea were purchased from different regions of Gilan Province. Methanol and dichloromethane extracts were prepared. Total phenol and caffeine were detected by spectroscopy. Quantification of heavy metals was done by digestion methods and examined by atomic absorption spectrophotometer. Results: The Mesn±SD amounts of total phenolic content, caffeine, lead, cadmium, and chromium in green tea from all regions comprised 27.13±1.54%, 3.20±0.01%, 0.81±0.66 ppm, 1.54±1.39 ppm, and 0.28±0.20 ppm, respectively, and these amounts in black tea were 14.90±1.53%, 3.20±0.05%, 1.00±0.79 ppm, 1.65±0.93 ppm, and 0.24±0.15 ppm, respectively. Conclusion: The content of total phenol and lead in tea was different in various regions of Gilan Province. Green tea contains more phenolic compounds than black tea, but the caffeine in green and black tea is almost equal. The amounts of cadmium and chromium in some Gilan Province areas are higher than the standard level, which needs to be investigated.
背景:由于茶具有刺激和有价值的作用,它是世界上仅次于水的最常用的饮料。这些效果是由于茶中的咖啡因和酚类化合物。此外,伊朗的大部分茶叶都种植在吉兰省。然而,来自重金属的食品污染是最重要的问题之一。目的:测定吉兰地区绿茶和红茶中总酚、咖啡因、铅、镉和铬的含量。方法:从吉兰不同地区采购绿茶和红茶样品10份。制备甲醇和二氯甲烷提取物。用光谱法测定总酚和咖啡因。用消解法测定重金属含量,用原子吸收分光光度计测定。结果:各地区绿茶中总酚、咖啡因、铅、镉和铬的Mesn±SD分别为27.13±1.54%、3.20±0.01%、0.81±0.66 ppm、1.54±1.39 ppm和0.28±0.20 ppm,红茶中总酚、咖啡因、铅、镉和铬的Mesn±SD分别为14.90±1.53%、3.20±0.05%、1.00±0.79 ppm、1.65±0.93 ppm和0.24±0.15 ppm。结论:吉兰不同地区茶叶中总酚和铅的含量存在差异。绿茶比红茶含有更多的酚类化合物,但绿茶和红茶中的咖啡因几乎相等。吉兰部分地区镉、铬含量超标,有待调查。
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引用次数: 1
The Effects of Vitamin C on the Quality of Semen, Testicular Tissue, and Apoptosis in Mice Exposed to Sodium Arsenite 维生素C对亚砷酸钠暴露小鼠精液质量、睾丸组织和细胞凋亡的影响
E. Cheraghi, Hamid Piroozmanesh, M. Mehranjani
Background: Arsenic is a heavy metal that causes malformation. It affects the reproductive system of men by induction of oxidative stress. Objectives: This study investigated the effect of Vitamin C (Vit C), as a potent antioxidant, on sperm quality and testicular tissue in mice that received sodium arsenite. Methods: A total of 28 adult male NMRI mice were divided into four groups: control, sodium arsenite (7 mg/kg/d), Vitamin C (Vit C; 150 mg/kg/d), and sodium arsenite+Vit C (with previous doses). Gavage treatments were administered for 35 days. At the end of the treatments, the right testis was used for histopathological observations and apoptosis assessment, and the left testis to evaluate sperm parameters. Results: Sperm parameters such as count, motility, viability, morphology, tail length, Daily Sperm Production (DSP), the diameter of seminiferous tubules, the height of the germinal epithelium, and the number of germ cells and Sertoli cells were significantly decreased in the sodium arsenite group compared to the control group (P<0.05). Malondialdehyde levels were significantly increased, and serum testosterone levels were significantly reduced in the sodium arsenite group. The mentioned parameters were compensated for in the sodium arsenite+Vit C group compared to the sodium arsenite group (P<0.05). Conclusion: Vitamin C can decrease the undesired changes induced by sodium arsenite in the male reproductive system.
背景:砷是一种导致畸形的重金属。它通过诱导氧化应激影响男性的生殖系统。目的:研究维生素C (Vit C)作为一种有效的抗氧化剂对亚砷酸钠小鼠精子质量和睾丸组织的影响。方法:将28只成年雄性NMRI小鼠分为4组:对照组、亚砷酸钠(7 mg/kg/d)、维生素C (Vit C;150mg /kg/d),亚砷酸钠+维生素C(既往剂量)。灌胃治疗35 d。治疗结束时,右睾丸进行组织病理学观察和细胞凋亡评估,左睾丸进行精子参数评估。结果:与对照组相比,亚砷酸钠组精子数量、活力、活力、形态、尾长、日精子产量(DSP)、精小管直径、生殖上皮高度、生殖细胞和支持细胞数量显著降低(P<0.05)。亚砷酸钠组丙二醛水平显著升高,血清睾酮水平显著降低。与亚砷酸钠组相比,亚砷酸钠+Vit C组上述参数得到补偿(P<0.05)。结论:维生素C可减轻亚砷酸钠对男性生殖系统的不良影响。
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引用次数: 0
A Review on Cyperus rotundus: Ancient Weed to Modern Elixir of Life Phytochemistry and Therapeutic Uses of Cyperus rotundus (Mustaka) 圆草:古杂草到现代生药、植物化学及治疗用途综述
H. Kandikattu, N. Amruta, F. Khanum, V.V.P.C. Narayana, Doddaga Srinivasulu
Background: Since time immemorial, humans have identified several herbs to treat various ailments. With the advancement of science and state-of-the-art technologies, different herbal extracts and chemical constituents of herbs were identified as therapeutic targets. Cyperus rotundus, also called mustaka, is one of the most ancient herbs widely distributed in tropical and subtropical regions across the globe. The tuberous and aerial parts of the herb were identified to possess various pharmacological properties. Objectives: This review focuses on the various phytocompounds of mustaka and how these compounds exert pharmacological effects and their mode of action. The molecular and cellular effects of mustaka were also discussed based on the preclinical and clinical reports available using an array of in vitro, in vivo, and ex vivo methodologies. Methods: The information from Google Scholar, Science direct, PUBMED, were reviewed with a special focus on the mode of action of C. rotundus from the data on animal and preclinical experiments to treat various diseases. Conclusion: Based on the literature available on C. rotundus in Google Scholar, Science Direct, and PubMed, the pharmacological properties of mustaka were reviewed with a particular focus on its neuropharmacological activities. The mode of action of C. rotundus and its bioactive metabolites at the molecular biology level were demonstrated based on animal and preclinical experiments to cure various ailments. These diverse effects prove C. rotundus as a valuable traditional medicine for treating various disorders.
背景:自古以来,人类已经发现了几种草药来治疗各种疾病。随着科学技术的进步,不同的草药提取物和草药的化学成分被确定为治疗靶点。圆草(Cyperus rotundus),又称木茸(mustaka),是世界上最古老的草本植物之一,广泛分布在热带和亚热带地区。经鉴定,该草药的块茎和地上部分具有不同的药理特性。目的:对木参中各种化合物的药理作用及其作用方式进行综述。根据临床前和临床报告,利用一系列体外、体内和离体方法,讨论了木参的分子和细胞效应。方法:通过检索Google Scholar、Science direct、PUBMED等网站的资料,重点从动物实验和临床前实验的数据中对圆梭菌治疗多种疾病的作用方式进行了综述。结论:基于Google Scholar、Science Direct和PubMed等网站上关于圆锥菊的文献,对圆锥菊的药理特性进行了综述,重点对圆锥菊的神经药理活性进行了综述。在动物实验和临床前实验的基础上,从分子生物学水平上论证了圆菌的作用方式及其生物活性代谢物对多种疾病的治疗作用。这些不同的作用证明了圆藤是治疗各种疾病的有价值的传统药物。
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引用次数: 1
Healthy Baby Delivery of a COVID-19 Infected Mother in Iran: Process and Protection 伊朗感染COVID-19的母亲健康分娩:过程和保护
Hamideh Abbaspour Kasgary, Parisa Moradimajd, Hamidreza Samaei, L. Davoodi
Background: In late December 2019, a kind of pneumonia caused by a novel coronavirus (SARS-CoV-2) emerged in Wuhan, Hubei Province, China. This virus rapidly spread worldwide and infected 195 countries and territories, including Iran. By March 22, 2020, the virus had affected more than 40000 people worldwide and caused more than 19000 deaths. Pregnant women are a vulnerable group to viral infections because partial immune suppression occurs during pregnancy. Therefore, the COVID-19 epidemic may cause a rising global concern about its consequences for pregnant women and fetuses. Objectives:In this case study, we report the delivery of a pregnant woman after her COVID-19 confirmation. Methods: We report a 44-year-old pregnant woman (32 weeks gestation) with COVID-19 who gave birth to a healthy baby with no evidence of COVID-19. We did not observe any worse clinical outcomes, such as maternal mortality, stillbirth, spontaneous abortion, and preterm delivery. Results: A preterm baby girl with 2500 g weight and Apgar scores at 5 minutes and 10 minutes were 9 and 10 was delivered. The preterm baby was normocephalic, had no icteric sclera, and the heart sounded normal without murmurs, Lung ventilation was normal. Conclusion: Viral pneumonia may severely be presented in pregnancy because of physiological and immunological changes and shift from cell-mediated to humoral-mediated immunity during the pregnancy period. Vertical transmission of COVID-19 from mother to child, shortterm and long-term adverse effects on mother and newborn are still unclear and controversial.
背景:2019年12月下旬,一种新型冠状病毒(SARS-CoV-2)引起的肺炎在中国湖北省武汉市出现。这种病毒在世界范围内迅速传播,感染了包括伊朗在内的195个国家和地区。截至2020年3月22日,该病毒已影响全球4万多人,造成1.9万多人死亡。孕妇是易受病毒感染的群体,因为在怀孕期间会发生部分免疫抑制。因此,COVID-19疫情可能会引起全球对其对孕妇和胎儿后果的日益关注。目的:在本病例研究中,我们报告了一名孕妇在确诊COVID-19后分娩的情况。方法:我们报告了一名44岁(孕32周)感染COVID-19的孕妇,她生下了一名健康的婴儿,没有COVID-19的证据。我们没有观察到任何更差的临床结果,如产妇死亡率、死产、自然流产和早产。结果:早产女1例,体重2500 g, Apgar评分分别为5分钟、10分钟、9分钟和10分钟。早产儿头位正常,无黄疸巩膜,心音正常,无杂音,肺通气正常。结论:病毒性肺炎可能在妊娠期发生严重的生理和免疫变化,由细胞免疫向体液免疫转变。COVID-19母婴垂直传播、对母亲和新生儿的短期和长期不良影响仍不清楚,也存在争议。
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引用次数: 0
Effects of Propolis and Persica Mouthwashes on Three Common Oral Streptococci: A Comparative Study 蜂胶漱口水和桃胶漱口水对三种常见口腔链球菌影响的比较研究
M. Alemrajabi, Mehdi Dastorani, Hadi Hamidi, Saeed Mohammadian, Maryam-Sadat Sadrzadeh-Afshar
Background: Dental caries and periodontal diseases are among the most common oral diseases, and research to achieve an effective strategy to overcome these diseases is necessary. One of these strategies is to use anti-septics and disinfectants, including mouthwashes. Although chlorhexidine was the first and most common mouthwash and the gold standard of anti-plaque treatments, it bears many side effects. However, herbal mouthwashes with antimicrobial properties and fewer side effects can effectively treat many of these diseases. Objectives: This study aimed to compare the efficiency of the two herbal types of mouthwash produced in Iran. Methods: The present in vitro study was conducted to investigate the anti-bacterial effects of persica and propolis mouthwashes on three strains of oral streptococci. The Zone of Inhibition (ZOI) was measured by the Disk Diffusion Method (DDM). The Minimum Inhibitory Concentration (MIC) value of each mouthwash was determined for all microorganisms using the macrodilution method. Results: Statistical analysis of data of DDM showed that the anti-bacterial effect of persica was significantly higher than propolis against Streptococcus. salivarius and Streptococcus. mutans (P<0.001), and these two types of mouthwash had similar anti-bacterial effects on Streptococcus. sanguis. Local propolis exhibited better MIC results than persica against S. salivarius and S. mutans, and these two types of mouthwash showed similar results against S. sanguis. Conclusion: Local propolis was more potent than persica in preventing the growth of oral streptococci.
背景:龋齿和牙周病是最常见的口腔疾病之一,研究有效的防治策略是必要的。其中一个策略是使用杀菌剂和消毒剂,包括漱口水。虽然氯己定是第一个也是最常见的漱口水,也是抗牙菌斑治疗的黄金标准,但它有许多副作用。然而,具有抗菌特性和较少副作用的草药漱口水可以有效治疗许多这些疾病。目的:本研究旨在比较伊朗生产的两种草药漱口水的效率。方法:采用体外实验的方法,研究桃胶蜂胶漱口水对3株口腔链球菌的抑菌作用。采用圆盘扩散法(DDM)测定抑制区(ZOI)。采用宏稀释法测定每种漱口水对所有微生物的最小抑菌浓度(MIC)值。结果:对DDM实验数据进行统计分析,结果表明桃木对链球菌的抑菌作用明显高于蜂胶。唾液和链球菌。(P<0.001),两种漱口水对链球菌的抗菌作用相似。sanguis。局部蜂胶对唾液链球菌和变形链球菌的MIC效果优于桃胶,两种漱口水对血链球菌的MIC效果相似。结论:局部蜂胶对口腔链球菌生长的抑制作用强于桃胶。
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引用次数: 2
Evaluation of the Antioxidant Potential of Aqueous Extracts of Moringa oleifera Leaf and Cocos nucifera Husk: A Comparative Analysis 辣木叶和椰子壳水提物抗氧化能力的比较分析
Adeola Folasade Ehigie, O. Akinyemi, T. E. Ayoade, A. F. Ogundola, Sunday Faith Oyelere, Folasade P. Olabinri
Background: Oxidative Stress (OS) can result in several diseases, such as cancer or neurodegenerative illnesses. Plant antioxidants can supplement the body’s antioxidant system, thereby reducing cell oxidation resulting from OS. Objectives: In this research, the antioxidant potential of aqueous husk extract of Cocos nucifera and aqueous leaf extract of Moringa oleifera was evaluated and compared. Methods:Total Phenolic Contents (TPCs), iron-chelating ability, Ferric Reducing Antioxidant Power (FRAP), and 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging antioxidant activity of aqueous husk extract of Cocos nucifera and aqueous leaf extract of Moringa oleifera are determined spectrophotometrically at varying concentrations (25, 50, 75, 100, 125µg/mL) and 1-sample t test statistical analysis was done using GraphPad Prism. The statistical significance was set at P<0.05. Results: The aqueous husk extract of Cocos nucifera and aqueous leaf extract of Moringa oleifera possess antioxidant activities at all tested concentrations. Significant increases were observed in TPCs, iron-chelating ability, and FRAP of aqueous leaf extract of Moringa oleifera compared with aqueous husk extracts of Cocos nucifera at the same concentration. In contrast, a significant decrease in DPPH scavenging activities was observed. Conclusion: Both aqueous husk extract of Cocos nucifera and aqueous leaf extract of Moringa oleifera are potent antioxidant agents and could be useful in supplementing the endogenous antioxidant system. Albeit, the aqueous leaf extract of Moringa oleifera is a more powerful antioxidant agent.
背景:氧化应激(OS)可导致多种疾病,如癌症或神经退行性疾病。植物抗氧化剂可以补充身体的抗氧化系统,从而减少由氧化引起的细胞氧化。目的:对椰子壳水提物和辣木叶水提物的抗氧化能力进行评价和比较。方法:采用分光光度法测定椰子壳水提物和辣木叶水提物在不同浓度(25、50、75、100、125µg/mL)下的总酚含量(TPCs)、铁螯合能力、铁还原抗氧化能力(FRAP)和2,2-二苯基-1-苦酰肼(DPPH)清除抗氧化活性,并采用GraphPad Prism进行1样本t检验统计分析。差异有统计学意义,P<0.05。结果:椰子壳水提物和辣木叶水提物在不同浓度下均具有抗氧化活性。在相同浓度下,辣木叶水提物的TPCs、铁螯合能力和FRAP均显著高于椰果壳水提物。相反,观察到DPPH清除活性显著降低。结论:椰子壳水提物和辣木叶水提物均为有效的抗氧化剂,可用于补充内源性抗氧化系统。尽管如此,辣木叶的水提取物是一种更强效的抗氧化剂。
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引用次数: 0
A Review on Current Side Effects of Used Drugs During Treatment of Patients With COVID- 19 COVID- 19患者治疗过程中常用药物副作用研究进展
Parisa Saberi Hasanabadi, R. Ataee
Background: Coronavirus disease 2019 (COVID-19) is a contagious disease caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). To increase the success in treating patients with COVID-19, many drug suggestions and some clinical studies are shared in the literature. However, the combination of several drugs with other clinical care has improved patients' conditions. And this review discusses some side effects of Covid-19 drugs' adverse effects. Objectives: Here, we have shortly reported the recent updates on the most common and plausible drugs for treating COVID-19 patients. We also compare these treatment options based on their impact on symptom management, inpatient length of stay, and overall morbidity and mortality. Methods: An extensive literature search was performed through PubMed, Scopus, Web of Science, and Google Scholar. Most of the keywords used were: "COVID-19", "Side effects of used drugs," "Treatment of COVID-19", "Risk factors," "Organ damage," and "Methods of diagnosis and treatment." Results: Anti-inflammatory, antimicrobial, and vitamin supplements do not have obvious benefits, but there is limited information to consider. Other factors and drugs such as improved plasma, eculizumab, immunoglobulins, IgG1-neutralizing monoclonal antibodies, remidseiver, steroids, and tosilizumab have shown potential effects on patient's length of hospital stay and mortality. Currently, there is no evidence that any other vaccines, apart from those specifically designed for the SARSCov-2 virus, will protect against COVID-19. Conclusion: Since the prevention of the COVID-19 virus is a new issue in the medical world, there is no known effective treatment option in this area, and the prevention of its adverse side effects has not been conclusively proven. Of course, the occurrence of side effects in patients undergoing treatment such as hepatotoxicity, retinal damage, nephrotoxicity, and cardiotoxicity proves that the necessary caution should be used in drug combination methods.
背景:冠状病毒病2019 (COVID-19)是由严重急性呼吸综合征冠状病毒2 (SARS-CoV-2)引起的传染性疾病。为了提高COVID-19患者的治疗成功率,文献中分享了许多药物建议和一些临床研究。然而,几种药物与其他临床护理的结合改善了患者的病情。本文就新冠肺炎药物的一些副作用进行了综述。目的:在这里,我们简要报告了治疗COVID-19患者最常见和最合理的药物的最新进展。我们还比较了这些治疗方案对症状管理、住院时间和总体发病率和死亡率的影响。方法:通过PubMed、Scopus、Web of Science和Google Scholar进行广泛的文献检索。使用最多的关键词是:“COVID-19”、“使用药物的副作用”、“COVID-19的治疗”、“危险因素”、“器官损害”和“诊断和治疗方法”。结果:抗炎、抗菌和维生素补充剂没有明显的益处,但可供考虑的信息有限。其他因素和药物,如改善血浆、eculizumab、免疫球蛋白、igg1中和单克隆抗体、remidsever、类固醇和tosilizumab,已显示出对患者住院时间和死亡率的潜在影响。目前,没有证据表明,除了专门为SARSCov-2病毒设计的疫苗外,还有任何其他疫苗可以预防COVID-19。结论:COVID-19病毒的预防是医学界的一个新课题,目前尚无已知的有效治疗方案,其不良反应的预防尚未得到最终证实。当然,在接受治疗的患者中出现肝毒性、视网膜损伤、肾毒性、心脏毒性等副作用,证明在联合用药方法中应谨慎使用。
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引用次数: 0
Effects of Methanol Extract on Bioactive Property and in Vitro Antioxidant Activity of Palma Christi (Anthocleista nobilis G. Don.) Root 甲醇提取物对棕榈生物活性及体外抗氧化活性的影响根
A. Ojatula
Background: Plants have diverse phytochemicals with different solubility levels and medicinal efficacy. This study aimed to determine the presence of phytochemical constituents and in vitro antioxidant activity of methanol root extract of Anthocleista nobilis. Objectives: Determining the bioactive principles and free radical scavenging properties of A. nobilis root Methods: The preliminary phytochemical investigations were performed using standard analytical procedures. The in vitro antioxidant properties were assessed by 2,2-diphenyl-1- picrylhydrazyl (DPPH) free radical scavenging assay, nitric oxide (NO) scavenging activity, ferric reducing antioxidant power (FRAP) assay, total antioxidant capacity (TAC), and hydrogen peroxide (H2 O2 ) scavenging activity. Results: The phytochemical analyses revealed the presence of several compounds: saponins, reducing sugar, alkaloids, tannins, flavonoids, cardiac glycosides, and mucilages. The concentrations of these compounds were different. A considerable quantity of phytochemicals was found in the methanol extract. The impact of the extract on DPPH, NO, FRAP, TAC, H2 O2 radicals were dependently and ascendingly concentrated. Solvent extract demonstrated better antioxidant activity, with DPPH and NO showing maximum antioxidant capability in conjunction with IC50 values of 5.45 µg/mL. Conclusion: The study results prove that A. nobilis is a possible source of natural antioxidants, justifying its use in indigenous medicine.
背景:植物具有多种化学物质,具有不同的溶解度和药用功效。本研究旨在测定花青树甲醇根提取物的植物化学成分及其体外抗氧化活性。目的:测定白芷根的生物活性原理和清除自由基的能力。方法:采用标准的分析方法进行初步的植物化学研究。通过2,2-二苯基-1-苦味肼基(DPPH)自由基清除试验、一氧化氮(NO)清除活性、铁还原抗氧化能力(FRAP)试验、总抗氧化能力(TAC)和过氧化氢(H2 O2)清除活性评估其体外抗氧化性能。结果:通过植物化学分析,发现了几种化合物:皂苷、还原糖、生物碱、单宁、黄酮类化合物、心苷和粘液。这些化合物的浓度是不同的。在甲醇提取物中发现了相当数量的植物化学物质。提取物对DPPH、NO、FRAP、TAC、H2 O2自由基的影响呈依赖性增强。溶剂提取物具有较好的抗氧化活性,DPPH和NO的抗氧化能力最强,IC50值为5.45µg/mL。结论:该研究结果表明,黄芪可能是天然抗氧化剂的来源,为其在土医药中的应用提供了依据。
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引用次数: 1
Phenolic Compounds, Antioxidants, and Antibacterial Activity of Some Native Medicinal Plants Against Pseudomonas Aeruginosa 一些本土药用植物对铜绿假单胞菌的酚类化合物、抗氧化剂和抗菌活性
Mandana Ahmadi, N. Bahador, A. Khodavandi
Background: Traditional medicines have a wide range of pharmacological properties. Objectives: This work was done to investigate the antimicrobial effect of Thymus vulgaris, Matricaria chamomilla, Melissa officinalis, and Rhus coriaria extracts against clinical isolates of Pseudomonas aeruginosa. Methods: A total of 180 P. aeruginosa clinical isolates were examined. Using the disc diffusion method, MIC and MBC of the methanol and alcohol herbal extracts were measured. Furthermore, microtiter plate assay evaluated biofilm development in the P. aeruginosa isolates. The free radical scavenging activity of the plant extracts against 2,2-diphenyl-1-picrylhydrazyl (DPPH) was determined. Results: Results showed that P. aeruginosa strains were resistant to more than three different classes of antibiotics. Our results demonstrated that the MBC value of ethanol and methanol extracts of thyme was 43.75 mg/mL, and 31.25 mg/mL, respectively. The highest MIC and MBC values were observed for the thyme and Lemon balm had the lowest MIC and MBC values. Our study showed that thyme extract was the most efficient plant extract against P. aeruginosa. The Mean±SD scavenging activity of thyme, chamomile, sumac, and lemon balm was 91.05±1.10, 89.55±0.70, 64.65±1.95, and 80.1±0.30%, respectively Conclusion: These findings may help in reducing our dependence on antibiotics and handling infections of opportunistic pathogens more efficiently. Further studies are required to distinguish the most important phytochemical compounds and estimate their antibiofilm activities and their mechanisms of action.
背景:传统药物具有广泛的药理特性。目的:研究寻常胸腺、洋甘菊、山茱萸和马齿苋提取物对铜绿假单胞菌临床分离株的抑菌作用。方法:对180株铜绿假单胞菌临床分离株进行检测。采用圆盘扩散法测定甲醇和乙醇提取物的MIC和MBC。此外,微滴板法评价了铜绿假单胞菌分离株的生物膜发育情况。测定了植物提取物对2,2-二苯基-1-苦味酰肼(DPPH)自由基的清除活性。结果:铜绿假单胞菌对3种以上抗生素耐药。结果表明,百里香乙醇和甲醇提取物的MBC值分别为43.75 mg/mL和31.25 mg/mL。百里香的MIC和MBC最高,柠檬香的MIC和MBC最低。研究表明,百里香提取物对铜绿假单胞菌的抑菌效果最好。百里香、洋甘菊、漆树和柠檬香的平均±SD清除率分别为91.05±1.10、89.55±0.70、64.65±1.95和80.1±0.30%。结论:本研究结果有助于降低我们对抗生素的依赖,更有效地处理条件致病菌感染。需要进一步的研究来区分最重要的植物化学化合物,并估计其抗生物膜活性及其作用机制。
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2005 Asian Conference on Sensors and the International Conference on New Techniques in Pharmaceutical and Biomedical Research
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