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Morphological, Pathological, Biochemical and Molecular Characterization of Ralstonia solanacearum Isolates in Bangladesh 孟加拉茄枯菌分离株的形态、病理、生化和分子特征
Pub Date : 2021-08-20 DOI: 10.4236/ajmb.2021.114012
S. Razia, M. Chowdhury, F. Aminuzzaman, N. Sultana, M. Islam
One thirty samples (fifty-five potato tubers, twenty-seven potato stems, three chili stems, twenty-eight soil samples, five weed samples, three banana leaves, and nine water samples) were examined and one hundred six (106) Bangladeshi isolates of Ralstonia solanacearum were isolated and identified. Isolation was made on selective media (Tetrazolium chloride media) and R. solanacearum was identified based on morphological, pathological and biochemical properties and polymerase chain reaction (PCR) by using the species-specific primers. Studies showed that 81.54% (106) samples were positive on tetrazolium chloride solid medium. Among them 90 isolates were virulent and rest of them were avirulent. Fifty isolates were selected for chemical characterization based on hypersensitivity test. R. solanacearum is gram negative, aerobic facultative bacteria on the basis of chemical characterization. Fifty tested isolates expressed as race 3 while in biovar test forty-eight showed as biovar III and the rest two showed as biovar I. In nine tested isolates from the three districts a species-specific band of 280 bp was amplified in PCR that confirmed the identity of R. solanacerum.
共检测了30个样品(55个马铃薯块茎、27个马铃薯茎、3个辣椒茎、28个土壤样品、5个杂草样品、3个香蕉叶和9个水样),分离鉴定了106个(106个)孟加拉分离物。在选择性培养基(氯化四氮唑培养基)上进行分离,利用物种特异性引物根据形态、病理和生化特性及聚合酶链反应(PCR)对茄青霉进行鉴定。研究表明,81.54%(106份)样品在氯化四氮唑固体培养基上呈阳性。其中90株毒株为强毒株,其余为无毒株。采用超敏试验对50株菌株进行化学鉴定。从化学性质上看,茄青霉属革兰氏阴性兼性好氧菌。在三个地区的9个分离株中,PCR扩增出280 bp的种特异性条带,证实了茄酸镰刀菌的身份。
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引用次数: 4
Prediction of Monophyletic Groups Based on Gene Order and Sequence Similarity in Organelle DNA 基于组织器DNA基因顺序和序列相似性的单类群预测
Pub Date : 2021-08-20 DOI: 10.4236/ajmb.2021.114008
M. Cserhati
Organelle genomics has become its own field of study. Much information can be gleaned from the study of cell organelles. The differences in the genomes of organelles, such as the mitochondrion and the chloroplast are amenable to phylogenetic and cladistic studies. These differences include the genome sequence, GC%, genome length and gene order. The conserved nature of the organelle genomes and the gene inventory of both mitochondrial and chloroplast genomes also make this easier to accomplish. This paper includes a review of existing organelle genome software. These include gene annotation and genome visualization tools as well as organelle gene databases for both mitochondrion and plastid. A new R tool, available on github, called “Organelle DNA Lineages”, or ODL, was written to compare and classify organelle genomes based on their genome sequence and gene order. The software was run on the mitochondrial genomes of a set of 51 cephalopod species, delineating ten separate monophyletic groups, including argonauts, nautiluses, octopuses, cuttlefish, and six squid groups. This new tool can help enrich and expand the field of organelle genomics.
器官基因组学已经成为它自己的研究领域。从细胞器的研究中可以收集到许多信息。细胞器基因组的差异,如线粒体和叶绿体,可以进行系统发育和分支研究。这些差异包括基因组序列、GC%、基因组长度和基因顺序。细胞器基因组的保守性以及线粒体和叶绿体基因组的基因库也使这一点更容易实现。本文综述了现有的细胞器基因组软件。其中包括基因注释和基因组可视化工具,以及线粒体和质体的细胞器基因数据库。github上提供了一种新的R工具,称为“细胞器DNA谱系”或ODL,用于根据细胞器基因组序列和基因顺序对其进行比较和分类。该软件在一组51种头足类动物的线粒体基因组上运行,划分出10个独立的单系群,包括argonauts、鹦鹉螺、章鱼、墨鱼和6个鱿鱼群。这一新工具可以帮助丰富和扩展细胞器基因组学领域。
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引用次数: 0
Occurrence, Molecular Characterization and Phylogenetic Relationship of Aspergillus Species Isolated from Garri Sold in Benue State, North Central, Nigeria 尼日利亚中北部贝努埃州Garri产曲霉的发生、分子特征及系统发育关系
Pub Date : 2021-08-20 DOI: 10.4236/ajmb.2021.114009
I. O. Ogbonna, I. Amai, C. Aguoru, Dooshima Charity Amai
Characterization and identification of molds based on cultural and morphological characteristics are often not reliable and frail with limitations. The occurrence of Aspergillus species in garri on sale in markets in Benue State, Nigeria, was studied by molecular techniques. Aspergillus species were isolated and purified on Potato Dextrose Agar. DNA from the purified isolates was extracted using the ZR fungal DNA miniprep and amplified by PCR mix made up of 12.5 μL of Taq 2X Master Mix. Primer sequences for the fungi characterization were internal transcribed spacers ITS 4 and ITS 5. The phylogenetic tree was plotted between the isolated organisms and reference sequences and evolutionary analysis was conducted in MEGA X. Result revealed that one thousand, six hundred and forty-six Aspergilli were isolated comprising of 980 and 666 isolates from the white and yellow garri respectively. Aspergillus flavus, A. fumigatus, A. niger, A. aculeatinus, and A. aculeatus were identified. Twenty percent (20%) of the strains had aflatoxin D structural gene, 50% amplified AFLP and 70% of the strains expressed AFLQ genes needed for the biosynthesis of aflatoxin B1. Majority of the strains that showed the expression of these structural genes were consistent with Aspergillus flavus. Phylogenetic tree showed a close relationship among the isolates and their most identical sequence in the NCBI database.
基于文化和形态特征对霉菌进行表征和鉴定往往不可靠,而且有局限性。利用分子技术研究了尼日利亚贝努埃州市场上出售的加里曲霉的发生情况。用马铃薯右旋糖酐琼脂分离纯化曲霉菌。使用ZR真菌DNA miniprep提取纯化分离株的DNA,并通过由12.5μL Taq2X Master mix组成的PCR混合物进行扩增。用于真菌鉴定的引物序列是内部转录间隔区ITS 4和ITS 5。结果表明,从白色和黄色加里氏菌中分别分离出一千、六百四十六个Aspergilli菌株,包括980个和666个分离株。鉴定出黄曲霉、烟曲霉、黑曲霉、刺曲霉和刺曲霉。20%的菌株具有黄曲霉毒素D结构基因,50%的菌株扩增了AFLP,70%的菌株表达了黄曲霉毒素B1生物合成所需的AFLQ基因。大多数表现出这些结构基因表达的菌株与黄曲霉一致。在NCBI数据库中,系统发育树显示了分离株之间的密切关系及其最相同的序列。
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引用次数: 0
Assessment of Possible Link of Intestinal Microbiota and Type 2 Diabetes Mellitus 肠道菌群与2型糖尿病可能联系的评估
Pub Date : 2021-06-18 DOI: 10.4236/ajmb.2021.113006
G. Simeon, Arikekpar Ibemologi, Dienize George Cameron
Introduction: This study assessed the role of gut bacteria in the development of type 2 Diabetes Mellitus. Methodology: Using bacteria cultural method, microbial species were isolated from feacal materials, identified and quantitated through application of genomic spectrophotometric systems with a quantitation of some marker biochemical parameters for Diabetes. Result: We observed a concentration of firmicutes, bacteriodetes, protecbacteria and bifidobacterium with Escherichia coli population predominating. Biochemical parameters reveal a 3-fold raised value for some bromakers in type 2 diabetes. At a confidence interval of 95% paired sample test results gave significant differences for all tested pairs. Conclusion: Result suggests that microbiomes have the potential to alter the gut environment and cause changes that promote the development of type 2 diabetes.
本研究评估了肠道细菌在2型糖尿病发展中的作用。方法:采用细菌培养法,从粪便材料中分离微生物种类,应用基因组分光光度系统对糖尿病的一些标志物生化参数进行定量鉴定和定量。结果:观察到厚壁菌门、抑菌门、保护菌和双歧杆菌的浓度,以大肠杆菌为主。生化参数显示,一些bromaker在2型糖尿病中的价值提高了3倍。在95%的置信区间内,成对样本检验结果对所有被检验的对都有显著差异。结论:结果提示微生物组有可能改变肠道环境并引起促进2型糖尿病发展的变化。
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引用次数: 0
Joint Effects of Mexidol and Nitroglycerine on Nitric Oxide Formation in Animal Liver Tissues 墨西多和硝化甘油对动物肝组织一氧化氮形成的联合作用
Pub Date : 2021-06-18 DOI: 10.4236/ajmb.2021.113007
T. Zhumabaeva, Z. Kuropteva, Zh. T. Moldaliev, Nazgul Zhumabaeva, A. Kadyrbaeva, Nurbek Bopoev, Z. Abdullaeva
This work is investigating Mexidol (2-ethyl-6-methyl-3-hydroxy pyridine succinate) effect on the formation of nitric oxide (NO) in animal liver tissues, which is a regulator of many physiological processes and plays an important role in the vascular relaxation, neurotransmission and immune system functioning. Analyses performed by EPR spectroscopy revealed Hem-NO complex signals from paramagnetic centers in arbitrary units; produced nitrogen oxide amount in liver tissues was determined by method of double integration signals from nitrosyl complexes.
Mexidol(2-乙基-6-甲基-3-羟基琥珀酸吡啶)对动物肝脏组织一氧化氮(NO)形成的影响,一氧化氮是许多生理过程的调节剂,在血管舒张、神经传递和免疫系统功能中起重要作用。EPR光谱分析显示任意单位的顺磁中心有Hem-NO复合信号;采用亚硝基配合物双积分信号法测定肝脏组织中产生的氮氧化物量。
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引用次数: 0
Characteristics of a Critical Calcium Transportation Regulator: Plasma Membrane Ca2+-ATPase Involved in Calcium Homeostasis from Hyriopsis cumingii (Lea) 一种关键钙转运调节因子:三角帆蚌(Lea)质膜Ca2+-ATP酶参与钙稳态的特性
Pub Date : 2021-03-26 DOI: 10.4236/AJMB.2021.112004
A. Zhang, Zhiming Zhou
Plasma Membrane Calcium ATPase (PMCA) plays a critical role in transporting Ca2+ out of the cytosol across the plasma membrane. Here, a full-length cDNA sequence of plasma membrane Ca2+-ATPase gene was isolated from the gill of Hyriopsis cumingii (HcPMCA) by using SMART RACE technique. The entire cDNA was 5230 bp, including a 417-bp 5'-UTR, a 3588-bp ORF and a 1225-bp 3'-UTR, encoding a 1195-amino acid protein, and no putative signal peptide was predicted. Compared with PMCA homologs from seawater mollusks, HcPMCA had high similarity with them in both sequence and structure. Tissue-specific expression analysis revealed that HcPMCA mRNA was detected in all the sampled tissues, but was prominently expressed in the gill and mantle. When exposed to a serie of increasing Ca2+ that lasted for 7 days, the mRNA expression of HcPMCA in the mantle was slightly downregulated, but peaked at 60 mg/L. Moreover, the temporal expression of HcPMCA transcripts in the mantle after 60 mg/L Ca2+ exposure was shown to be bell-shaped, which was slightly downregulated at 24 h, but upregulated from 24 h to 48 h post-treatment, peaking at 48 h. The result of present study provides useful information for further studies on function and regulation mechanism of HcPMCA gene.
质膜钙ATP酶(PMCA)在将Ca2+转运出胞质溶胶穿过质膜方面起着关键作用。本文利用SMART RACE技术从三角帆蚌(HcPMCA)鳃中分离到一个质膜Ca2+-ATP酶基因的全长cDNA序列。整个cDNA全长5230bp,包括417bp的5'-UTR、3588bp的ORF和1225bp的3'-UTR,编码1195个氨基酸的蛋白质,并且没有预测到推定的信号肽。与海水软体动物的PMCA同源物相比,HcPMCA在序列和结构上与它们具有高度相似性。组织特异性表达分析显示,HcPMCA mRNA在所有取样组织中都检测到,但在鳃和地幔中显著表达。当暴露于持续7天的一系列增加的Ca2+时,地幔中HcPMCA的mRNA表达略有下调,但在60mg/L时达到峰值。此外,60 mg/L Ca2+暴露后,HcPMCA转录物在地幔中的时间表达呈钟形,在24小时略有下调,但在处理后24小时至48小时上调,在48小时达到峰值。本研究的结果为进一步研究HcPMCA基因的功能和调节机制提供了有用的信息。
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引用次数: 0
Expression of Difficult-to-Express Proteins, Human IL-12 and IFN-γ 难表达蛋白、人IL-12和IFN-γ的表达
Pub Date : 2021-03-04 DOI: 10.4236/AJMB.2021.112003
Yoshihito Hosaka, S. Matsutani, Shinya Kawate, K. Itoh, A. Miura, Yukaze Mizoura, Sayumi Yamada, S. Uemura, H. Konno, Ewa Grave, H. Wakui, H. Itoh
It is known to be that lactic acid bacteria induce the IL-12. IL-12 activates NK cells and promotes the production of IFN-γ. IFN-γ activates macrophages, resulting in enhanced phagocytosis and bactericidal activity. We have been investigating fermented foods that activate the immune function. For that purpose, a specific antibody is required. We tried to express IL-12p35 by the usual method, but IL-12p35 was not expressed at all. In the present study, we constructed, purified human IL-12p35 and obtained a specific antibody against IL-12p35. We also purified human IFN-γ and obtained specific antibody against IFN-γ. We have established a method for expressing poorly expressed proteins. The method we have established can be applied to the purification of poorly expressed proteins and antibody production.
目前已知的是乳酸菌诱导IL-12。IL-12激活NK细胞,促进IFN-γ的产生。IFN-γ激活巨噬细胞,增强其吞噬和杀菌活性。我们一直在研究能激活免疫功能的发酵食品。为此,需要一种特殊的抗体。我们尝试用常规方法表达IL-12p35,但IL-12p35完全不表达。在本研究中,我们构建、纯化了人IL-12p35,并获得了针对IL-12p35的特异性抗体。我们还纯化了人IFN-γ,获得了针对IFN-γ的特异性抗体。我们已经建立了一种表达低表达蛋白的方法。我们建立的方法可以应用于低表达蛋白的纯化和抗体的产生。
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引用次数: 2
A Study of Prevalence and Pathogenic Activity of Bacteria in the Air of Dhaka City and Their Antimicrobial Resistance Pattern 达卡市空气中细菌的患病率、致病性及其耐药性模式研究
Pub Date : 2021-03-04 DOI: 10.4236/AJMB.2021.112005
S. Nawar, M. Rashid, A. Ahmed, Mahboob Hossain
Bangladesh composes the most polluted air with Dhaka securing the top position. The purpose of the study is the enumeration of the prevalence of pathogenic bacteria in Dhaka city’s air and their antibiotic susceptibility to the common antibiotics. For the sample collection, different selective media was exposed in air where the highest and lowest CFU was 137 and 1 respectively. Pathogens were screened through Hemolysis, DNase and Coagulase test and identified by 16s rRNA sequencing followed by antibiotic susceptibility test. 16s rRNA sequencing revealed that the organisms were Bacillus altitudinis strain 41KF2bT.28, Bacillus licheniformis strain QMA46-2, Bacillus altitudinis, Bacillus pumilis strain BJ-DEBCR-34, Staphylococcus aureus strain TPS3156, Bacillus sp CO16, Pseudomonas sp strain 96LC22 and Shigella dysenteriae strain ATCC 13313. Shigella dysenteriae, Staphylococcus aureus were 81.81% and 54.54% resistant to the antibiotics. Whole-genome sequencing would help to observe mutations in the traits as changes in hemolytic activity were found during pathogenecity tests.
孟加拉国的空气污染最严重,达卡位居榜首。本研究的目的是统计达卡市空气中致病菌的流行情况及其对常见抗生素的抗生素敏感性。对于样品采集,不同的选择性培养基暴露在空气中,其中最高和最低CFU分别为137和1。通过溶血、DNA酶和凝固酶试验筛选病原体,并通过16s rRNA测序和抗生素敏感性试验进行鉴定。16s rRNA测序显示,这些生物体为高原芽孢杆菌菌株41KF2bT.28、地衣芽孢杆菌菌株QMA46-2、高原芽孢杆菌、短小芽孢杆菌菌株BJ-DEBCR-34、金黄色葡萄球菌菌株TPS3156、芽孢杆菌sp CO16、假单胞菌sp菌株96LC22和痢疾志贺菌菌株ATCC 13313。痢疾杆菌、金黄色葡萄球菌对抗生素的耐药性分别为81.81%和54.54%。全基因组测序将有助于观察致病性测试中发现的溶血活性变化导致的性状突变。
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引用次数: 1
The Anti-Sickling Properties of Medicinal Plants, Insights in Botanical Medicine* 药用植物抗镰刀病特性,植物医学见解*
Pub Date : 2021-01-01 DOI: 10.4236/ajmb.2021.114013
Ioannis Krasias
SCD is one of the most prevailing homogeneous inherited haemoglobinopathies causing a plethora of various clinical complications to the patients. The high mortality and morbidity severely concern the Western community, where numerous clinical trials and research for a cure are in process. In order to al-leviate patients from the severe symptoms of the disease, avoiding the side effects, Botanical Medicine exhibits concrete evidence, as a gold candidate, to be the salvation to the problem. The Preferred Reporting Items for Systematic Review (PRISMA) protocol has been used to achieve extensive research on the topic, focusing on the identification and evaluation of the phytochemical properties of common medicinal plants. Meta-analysis has also been imple-mented on the results of published literature. Forest plots have been plotted, comparing and evaluating the results’ validity and significance. The meta-analysis results have undoubtedly demonstrated the importance and significance of the medicinal plants and their properties against various clinical complications, focusing on the pathogenicity of SCD. Surprisingly, their effectiveness to suppress haemoglobin polymerisation and increase the Fe 2+ /Fe 3+ ratio in patients, en-hanced the normal morphological erythrocytes’ appearance by suppressing the sickle shape of drepanocytes. Research made on the epidemiology of SCD asso-ciates the disease with the geographical frequency of malaria infection. Based on the natural selection theory of Charles Darwin, nature aids in the popula-tion’s survival by the endemicity of various medicinal plants in areas with increased SCD patients. Limitations to the medicinal plants’ consumptions and further therapeutic options have been discussed.
SCD是最普遍的同质遗传性血红蛋白病之一,引起过多的各种临床并发症的患者。高死亡率和发病率严重关注西方社会,许多临床试验和治疗研究正在进行中。为了使患者从疾病的严重症状中解脱出来,避免副作用,植物医学作为一种黄金候选者,展现出具体的证据,成为问题的救世之道。系统评价首选报告项目(PRISMA)协议已被用于对该主题进行广泛的研究,重点是鉴定和评估常见药用植物的植物化学特性。对已发表文献的结果也进行了meta分析。绘制了森林样地,并对结果的有效性和显著性进行了比较和评价。荟萃分析结果无疑证明了药用植物及其抗各种临床并发症特性的重要性和意义,重点关注SCD的致病性。令人惊讶的是,它们在抑制血红蛋白聚合和增加患者铁2+ /铁3+比率方面的有效性,通过抑制镰状drepanocytes来增强正常形态红细胞的外观。对疟疾流行病学的研究将该病与疟疾感染的地理频率联系起来。根据达尔文的自然选择理论,大自然通过在SCD患者增加的地区特有的各种药用植物来帮助种群的生存。讨论了药用植物消费的局限性和进一步的治疗选择。
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引用次数: 0
Selective Degradation of Mitochondria by Mitophagy in Pathogenic Fungi 病原真菌线粒体自噬的选择性降解
Pub Date : 2021-01-01 DOI: 10.4236/ajmb.2021.111002
Jane Sadhna Jagernath, Shuai Meng, Jiehua Qiu, Shi Huanbin, Yanjun Kou
Selective mitochondrial autophagy or mitophagy is an evolutionarily conserved cellular process that selectively degrades superfluous, damaged, and dysfunctional mitochondria. This process is believed to be a mitochondrial quality control system crucial for intracellular homeostasis. Recently, researchers developed a range of methods to induce mitophagy and a variety of assays to monitor this process. With these new methods, the research on mitophagy has been developed rapidly. In particular, some key receptors and regulatory factors in fungi have been identified, which provides a basis for further understanding of the mechanism of this process. Although it has been studied extensively in the model yeast Saccharomyces cerevisiae, mitophagy in pathogenic fungi remains poorly understood. However recent studies have shown that mitophagy is involved in the regulation of pathogenicity of pathogenic fungi, which greatly increases the importance of mitophagy. Therefore, it is necessary to review the current research on mitophagy in order to provide an accurate understanding of mitophagy and promote mitophagy research in the pathogenic fungi.
选择性线粒体自噬或线粒体自噬是一种进化上保守的细胞过程,选择性地降解多余的、受损的和功能失调的线粒体。这一过程被认为是线粒体质量控制系统对细胞内稳态至关重要。最近,研究人员开发了一系列诱导有丝分裂的方法和各种检测方法来监测这一过程。随着这些新方法的出现,对线粒体自噬的研究得到了迅速发展。特别是真菌中一些关键受体和调控因子的发现,为进一步了解这一过程的机制提供了基础。尽管在酿酒酵母菌模型中已进行了广泛的研究,但对病原真菌中的有丝分裂仍知之甚少。然而,近年来的研究表明,有丝自噬参与了病原真菌的致病性调控,这大大增加了有丝自噬的重要性。因此,有必要对线粒体自噬的研究现状进行综述,以提供对线粒体自噬的准确认识,促进病原真菌中线粒体自噬的研究。
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引用次数: 1
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美国分子生物学期刊(英文)
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