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CRISPER/CAS: A potential tool for genomes editing CRISPER/CAS:基因组编辑的潜在工具
Pub Date : 2021-11-12 DOI: 10.47262//bl/7.2.20210711
Maria Fayyaz, Aqsa Iqbal, M. Maqsood, Haseeb Akram
The ability to engineer genomes presents a significant opportunity for applied biology research. In 2050, the population of this world is expected to reach 9.6 billion residents; rising food with better quality is the most promising approach to food security. Compared to earlier methodologies including Zinc Finger Nucleases (ZFNs) plus Transcription Activator-Like Effector Nucleases (TALENs), which were expensive as well as time-consuming, innovation in Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR) and related CRISPR (Cas) protein classifications allowed selective editing of genes for the enhancement of food. The basic mechanism of CRISPR Cas9 process and its applications on genome editing has been summarized in this manuscript. The method relies on Sequence-Specific Nucleases (SSNs) to create Double Stranded Breaks (DSB) of DNA at the locus of genome defined by user, mended by using one of two DNA mending ways: Non-Homologous End Joining (NHEJ) or Homology Directed Repair (HDR). Cas9, an RNA-guided endonuclease, was used to produce stable knock-in and knock-out mutants. The focus of this effort is to explore the CRISPR Cas9 genome editing to manage gene expression and improve future editing success. This adaptable technique can be consumed for a wide range of applications of genome editing requiring high precision. Advances in this technology have sparked renewed interest in the possibilities for editing genome in plants.
基因组工程的能力为应用生物学研究提供了一个重要的机会。到2050年,世界人口预计将达到96亿;提高粮食质量是最有希望的粮食安全途径。与早期的方法(包括锌指核酸酶(ZFNs)和转录激活因子样效应核酸酶(TALENs))相比,这些方法既昂贵又耗时,集群规则间隔短回环重复序列(CRISPR)和相关CRISPR (Cas)蛋白质分类的创新允许对基因进行选择性编辑以增强食物。本文综述了CRISPR Cas9过程的基本机制及其在基因组编辑中的应用。该方法依靠序列特异性核酸酶(ssn)在用户定义的基因组位点上产生DNA双链断裂(DSB),通过两种DNA修复方式之一进行修复:非同源末端连接(NHEJ)或同源定向修复(HDR)。Cas9是一种rna引导的内切酶,用于产生稳定的敲入和敲除突变体。这项工作的重点是探索CRISPR Cas9基因组编辑来管理基因表达并提高未来编辑的成功率。这种适应性强的技术可用于需要高精度的基因组编辑的广泛应用。这项技术的进步重新激起了人们对编辑植物基因组可能性的兴趣。
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引用次数: 0
An ethnobotanical study of medicinal plants used to treat skin diseases by the native communities of Murree, Pakistan 巴基斯坦Murree土著社区用于治疗皮肤病的药用植物的民族植物学研究
Pub Date : 2021-11-02 DOI: 10.47262/bl/7.2.20210630
Husna Arshad, B. Parveen, R. Batool, Fozia Bibi, Nidaa, Harun, K. Fatima, Darima Habib
The objective of this study was to document traditional medicinal plants (including their applications and associated procedures) used to treat skin diseases by native communities of Murree Hills (Pakistan). Data was collected from 5 different sampling sites and 138 informants were interviewed. Respondents were queried in their local language for the type of herbal treatment, famous to that area. It was observed that elderly people and health practitioners of the study area possessed more knowledge about herbal remedies in contrast to young aged people. Results reported that total 56 plants belonging to 36 families and 54 genera were in use by local communities for treatment of multiple skin diseases. It was detected that herbs (41%) constituted the highest proportion of medicinal plants followed by shrubs. Leaves were most reported plant part (43 %) followed by fruits (20%), whereas infusion (30%) was a widely used mode of preparation of traditional remedies and direct application on skin was the dominant route of administration. Relative frequency citation (RFC) was recorded highest for Mentha royleana (0.913) and least for Ajuga bracteosa (0.369). Cluster analysis grouped these medicinal species into high, medium and low-ranking groups. High ranking group comprised of 18 medicinal plants, which reflected the popularity and trust of local communities of these plants. Therefore, further pharmacological studies are highly recommended. This study is first proper documentation based on the valuable information attained by the local tribes and it can be utilized by scientific community for further validation and characterization.
本研究的目的是记录Murree Hills(巴基斯坦)土著社区用于治疗皮肤病的传统药用植物(包括其应用和相关程序)。从5个不同的采样点收集数据,并对138名举报人进行了访谈。受访者用当地语言询问了该地区著名的草药治疗类型。据观察,与年轻人相比,研究区域的老年人和保健从业人员对草药有更多的了解。结果报告,当地社区共有56种植物用于治疗多种皮肤病,隶属于36科54属。药用植物中以草本植物占比最高(41%),其次为灌木。叶子是报告最多的植物部位(43%),其次是果实(20%),而输液(30%)是传统药物广泛使用的制备方式,直接应用于皮肤是主要的给药途径。相对被引频次(RFC)最高的是薄荷(0.913),最低的是小苞草(0.369)。聚类分析将这些药用植物分为高、中、低3个等级。高排名组由18种药用植物组成,反映了这些植物在当地社区的受欢迎程度和信任度。因此,强烈建议进行进一步的药理学研究。本研究是基于当地部落获得的有价值信息的第一次适当的文献记录,可以为科学界进一步验证和表征所利用。
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引用次数: 0
Mode of inheritance of syndactyly in selected human families in Bahawalnagar, Pakistan 巴基斯坦巴哈瓦尔纳加尔地区某些人类家庭中并趾遗传模式的研究
Pub Date : 2021-10-17 DOI: 10.47262/bl/7.2.20210609
Muhammad Najam-ul-Hassan Khan, Muhammad Saleem Khan, Shozab Khan, Hina Naz, A. Waheed, Hasnain Akmal, M. Wajid
Syndactyly is joining or merging of web in feet and hands digits. It is inherited by autosomal dominant, autosomal recessive, x-linked, and y-linked manner. Its prevalence is around 1 in 2000 live birth. Non-syndromic syndactyly is classified into nine types. In this study, we find out prevalence, percentage, types, and mode of inheritance of syndactyly in families of district Bahawalnagar. The survey was carried out in hospitals, schools, and villages of district Bahawalnagar to find out the patients with congenital syndactyly. Three families with cousin marriages were selected for pedigrees. These families had 2:1 of foot and hand syndactyly. The percentage of complete and incomplete syndactyly was recorded 50% in all families. The mode of inheritance was autosomal dominant and autosomal recessive pattern because of two types of syndactyly type I (SD1) and syndactyly type I-c. In families Bwn1, Bwn2, and Bwn3 the percentage of family members associated with syndactyly was 16%, 9.7%, and 6.89% respectively. It was further noted that all male members of all families were affected with syndactyly. This study finds out the type I (SD1) and type I-c syndactyly in the studied sample population.
并指是指脚和手手指的蹼的连接或合并。它以常染色体显性、常染色体隐性、x连锁和y连锁方式遗传。其患病率约为每2000例活产婴儿中有1例。无证并指分为九种类型。在本研究中,我们了解了巴哈瓦尔纳加尔地区家庭中并指病的患病率、百分比、类型和遗传方式。调查在巴哈瓦尔纳加尔县的医院、学校和村庄进行,以找出先天性并指畸形患者。有表亲结婚的三个家庭被选为家谱。这些家庭的足和手并指比例为2:1。所有家庭中并指完整和不完整的比例均为50%。遗传模式为常染色体显性遗传和常染色体隐性遗传,因为有2种并指型I (SD1)和并指型I-c。在Bwn1、Bwn2和Bwn3家族中,并指发生率分别为16%、9.7%和6.89%。有人进一步指出,所有家庭的所有男性成员都患有并指畸形。本研究在研究样本人群中发现I型(SD1)和I-c型并指。
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引用次数: 0
Adaptive evolutionary analyses of the COVID-19 pandemic in twelve most affected countries 12个受影响最严重国家COVID-19大流行的适应性进化分析
Pub Date : 2021-10-04 DOI: 10.47262/bl/7.1.20210807
Viruses are detrimental to the population from time to time. Nevertheless, COVID-19 is the recent pandemic that affects almost all the countries of the world. September 2021, more than 4.5 million deaths are registered in the world as per the latest report by the World Health Organization. The origin of coronavirus from animals has been discussed in this study. Twelve different SARSCoV-II genomes against five Middle East Respiratory Syndromes (MERS) genomes have been analyzed. In silico approaches have been utilized to analyze the phylogenetic history of SARS-CoV-II from different countries. The genomes of many countries are closely associated with the phylogenetic analysis. The results indicate twelve complete genome studies of representative SARS CoVs, MERS CoVs, and human SARS CoV-II, the genome was found to be the most comparable to the recent novel human SARS CoV-II genomes.
病毒有时对人类有害。然而,COVID-19是最近影响世界上几乎所有国家的大流行。2021年9月,根据世界卫生组织的最新报告,全球有450多万人死亡。本研究讨论了冠状病毒的动物来源。12个不同的SARSCoV-II基因组与5个中东呼吸综合征(MERS)基因组进行了分析。利用计算机方法分析了来自不同国家的SARS-CoV-II的系统发育历史。许多国家的基因组与系统发育分析密切相关。结果表明,对代表性SARS冠状病毒、MERS冠状病毒和人类SARS CoV-II进行的12次全基因组研究发现,该基因组与最近发现的新型人类SARS CoV-II基因组最具可比性。
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引用次数: 1
Ecological wastewater treatment system: Management approach to solve sanitation and water problems 生态污水处理系统:解决卫生和水问题的管理方法
Pub Date : 2021-09-30 DOI: 10.47262/bl/7.1.20210721
Wastewater contains various types of pollutants, such as nutrients, solids, organic carbon, metals, inorganic salts, pathogens, etc. Therefore, effective wastewater treatment is crucial for public health as well as for environmental concern. On the other hand, water management with limited water resources is a great challenge in most countries. The freshwater shortage is seriously affecting the economic and social growth of developing nations. An ecological wastewater treatment system is a concept towards ecologically and economically sounds wastewater management. Water and organic nutrients in wastewater consider as a resource and can reuse and recycle in agriculture. The study reviewed the principles and concepts of the ecological wastewater treatment system and a case study of the ecological treatment system by growing economic vegetation. A hybrid constructed wetland (CW) system was used to investigate the performance. The CW system showed high removal efficiency for TP (total phosphorus), NH4 (ammonium), and TN (total nitrogen). The removal efficiencies were 97%, 75%, and 64% for TP, NH4-N, and TN, respectively. Ecological wastewater treatment system is cost-effective, and energy-saving also offers nutrients recycling, water reuse, recreation activities, and vegetation growth.
废水中含有各种类型的污染物,如营养物质、固体、有机碳、金属、无机盐、病原体等。因此,有效的废水处理对公众健康和环境问题至关重要。另一方面,水资源有限的水资源管理在大多数国家是一个巨大的挑战。淡水短缺严重影响着发展中国家的经济和社会发展。生态废水处理系统是对生态和经济上合理的废水管理的概念。废水中的水和有机养分被认为是一种资源,可以在农业中再利用和循环利用。本文综述了污水生态处理系统的原理和概念,并以经济植被生态处理系统为例进行了研究。采用混合人工湿地(CW)系统对其性能进行了研究。连续水处理系统对TP(总磷)、NH4(铵)和TN(总氮)的去除率较高。对TP、NH4-N和TN的去除率分别为97%、75%和64%。生态废水处理系统既节约成本,又节约能源,提供养分循环利用、水回用、娱乐活动和植被生长。
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引用次数: 1
Green synthesis of gold nanoparticles using Tribulus terrestris extract and antibacterial activity against Gram-negative bacteria 蒺藜提取物绿色合成金纳米颗粒及其对革兰氏阴性菌的抗菌活性
Pub Date : 2021-09-29 DOI: 10.47262/bl/7.2.20210617
Nighat Nawaz, Irshad Ahmad, S. G. Patching, Iqbal, Hussain
Aqueous extract of the plant Tribulus terrestris was used to reduce chloroauric acid for synthesizing gold nanoparticles (AuNPs). In this green synthesis, the reaction proceeded to give a red/purple color that was monitored by UV-vis spectrophotometry, where the formed AuNPs had an absorption band with max of 550 nm. In terms of the highest absorbance at 550 nm, reaction conditions were optimized at a temperature of 75°C, at pH 7 and using a reaction time of 4 h. The integrity of the synthesized AuNPs was confirmed and their physical properties were characterized by Fourier-transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM), which also showed evidence that plant metabolites contributed to capping or stabilization of the AuNPs. XRD spectra suggested a particle size of around 40 nm and SEM images revealed spherical and relatively uniform and disperse particles with a size of less than 0.1 m. In a broth microdilution assay, the AuNPs showed inhibitory effects against Gram-negative Escherichia coli, but not against Gram-positive Enterococcus faecalis. The AuNPs showed no hemagglutination activity or cytotoxic activity against human blood cells, which is important for them to be explored as therapeutic antibacterial agents.
以蒺藜水提液为原料,还原氯金酸合成纳米金。在这个绿色合成中,反应继续产生红/紫色,通过紫外-可见分光光度法监测,其中形成的AuNPs具有最大550nm的吸收带。在温度为75℃、pH为7、反应时间为4 h的条件下,在550 nm处获得了最高吸光度。通过傅里叶变换红外(FTIR)光谱、x射线衍射(XRD)和扫描电镜(SEM)对合成的AuNPs的完整性进行了验证,并对其物理性质进行了表征,结果表明植物代谢物对AuNPs的覆盖或稳定起了作用。XRD光谱显示其粒径约为40 nm, SEM图像显示粒径小于0.1 m的球形且相对均匀分散的颗粒。在肉汤微量稀释试验中,AuNPs对革兰氏阴性大肠杆菌有抑制作用,但对革兰氏阳性粪肠球菌没有抑制作用。这些AuNPs对人血细胞无血凝活性或细胞毒活性,这对它们作为治疗性抗菌剂的探索具有重要意义。
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引用次数: 1
Immunological considerations and vaccines against COVID-19 针对COVID-19的免疫学考虑和疫苗
Pub Date : 2021-08-16 DOI: 10.47262/bl/7.1.20210501
The outbreak COVID-19 is considered as a revolution in history of biological science. SARS-CoV-2 is a main cause of COVID-19 having resemblance with MERS-CoV and SARS-CoV. The response of host to the infection of SARS-CoV is multiform and strong. Initially, an effective host defense in the lung is affiliated with disease resolution and mild symptoms. The escaping of virus from immune response can lead to damage the alveoli, systematic inflammation, and ineffective lung repair mechanism with associated organ dysfunction. The immunological responses are necessary to fight with the virus and an effective and a safe vaccine is needed to overcome the pandemic. The development of vaccine is progressing fast, billions of dollars committed with more than 200 candidates before even knowing whether a vaccine candidate will succeed.
新冠肺炎疫情被认为是生命科学史上的一次革命。SARS-CoV-2与MERS-CoV和SARS-CoV有相似之处,是COVID-19的主要病因。宿主对SARS-CoV感染的反应是多种多样且强烈的。最初,肺部有效的宿主防御与疾病消退和轻微症状有关。病毒从免疫应答中逃逸可导致肺泡损伤、全身炎症和肺修复机制失效并伴有器官功能障碍。免疫反应是抗击病毒所必需的,需要一种有效和安全的疫苗来克服这一流行病。疫苗的开发进展迅速,甚至在知道一种候选疫苗是否成功之前,就已经投入了数十亿美元用于200多种候选疫苗。
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引用次数: 1
COVID-19 in children: A review 儿童COVID-19:综述
Pub Date : 2021-08-16 DOI: 10.47262/bl/7.1.20210511
From December 2019, SARS-CoV-2 pandemic occurred that started in Wuhan, China, initially spread in China and then globally all over the World. The COVID-19 has also increased in a number of children, but they have better prognosis and lighter course than adults. According to a study, the overall rate is 5,431 cases per 100,000 children. The prevalence of COVID-19 among children under 18 years was 2.1% and their death rate was only 0.01%. Death rate is rare in children. The majority of children have no clinical sign and symptoms; it’s difficult to identify pediatric patients. The patient does not have information about epidemiologically. These patients create dangerous situation in a community to spread infection.
从2019年12月开始,SARS-CoV-2大流行发生在中国武汉,最初在中国传播,然后在全球范围内传播。许多儿童的COVID-19也有所增加,但他们的预后较好,病程较轻。根据一项研究,总体比率为每10万名儿童中有5431例。18岁以下儿童的COVID-19患病率为2.1%,死亡率仅为0.01%。儿童死亡率很低。多数患儿无临床体征和症状;儿科病人很难识别。患者不了解流行病学方面的信息。这些患者在社区中造成了传播感染的危险情况。
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引用次数: 0
A revolution by recombinant DNA technology to improve the quality of life 重组DNA技术的革命提高了生活质量
Pub Date : 2021-02-05 DOI: 10.47262/bl/7.1.20201223
The emergence of recombinant DNA (rDNA) technology occurred through the appropriate use of known procedures and tools in novel ways that resulted in broad applications for modifying and analyzing gene structure and organization of complex genomes. In the past centuries, the production of organisms having desirable traits was a mere imagination. Nowadays, rDNA technology has revolutionized the field of science, having vast and multidisciplinary applications, and products that were impossible to produce by conventional or traditional methods. With the aid of rDNA technology, impossible things could be achieved. rDNA technology has vital applications like plant and animal production, health improvement, increment in food resources, treatment of serious diseases, protein development, improved environmental conditions, etc. This technology plays a crucial role not only in the betterment of health conditions by the development of pharmaceuticals or new vaccines but also in improving the treatment strategies by developing monitoring devices, novel therapeutic approaches, and new diagnostic kits. This review mainly emphasizes the possible roles of rDNA technology for human welfare.
重组DNA (rDNA)技术的出现是通过以新颖的方式适当地使用已知的程序和工具,从而在修改和分析复杂基因组的基因结构和组织方面获得了广泛的应用。在过去的几个世纪里,生产出具有理想特性的生物体仅仅是一种想象。如今,rDNA技术已经彻底改变了科学领域,具有广泛的多学科应用,以及通过传统或传统方法无法生产的产品。在rDNA技术的帮助下,不可能的事情可以实现。rDNA技术在动植物生产、改善健康、增加粮食资源、治疗严重疾病、开发蛋白质、改善环境条件等方面具有重要应用。这项技术不仅通过开发药物或新疫苗来改善健康状况,而且通过开发监测装置、新的治疗方法和新的诊断试剂盒来改进治疗战略,发挥着至关重要的作用。本文主要介绍了rDNA技术在人类福祉方面可能发挥的作用。
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引用次数: 0
Overview of Vitamin D, its status and consequences: Challenges and prospects for Pakistani population: A Review 维生素D概述,其现状和后果:巴基斯坦人口的挑战和前景:综述
Pub Date : 2021-01-07 DOI: 10.47262/bl/7.1.20201114
Muhammad Taimur Siddique, Ahmed Hafeez, Sadaf Mearaj, Shabbar Abbas
Vitamin D, like other vitamins, is an essential micronutrient required for proper human metabolic function. It refers to a group of compounds, the most important of which are D2 (ergocalciferol) and D3 (cholecalciferol). Vitamin D is acquired from two main sources, synthesis in lower layers of the skin triggered by exposure to the sun (90%) and through diet (10%). Vitamin D levels can be determined by measuring 25(OH)D concentration in the serum and deficiencies are responsible for a wide range of issues including bone-related problems, depression, diabetes, autoimmune disorders, cardio and respiratory problems, infections, autism and obesity. Synthesis in the body can be affected by a variety of factors including skin color, age, lifestyle, clothing, weather and even general health illiteracy. In terms of diet, the staple foods of the Pakistani population are generally deficient in vitamin D. As a result, a significant proportion of the Pakistani population, in particular women and children, suffer from vitamin D deficiency. The various challenges that need to be addressed to overcome this issue are discussed, along with potentially employable strategies such as food fortification (for example by micro and nano encapsulation technologies) and bio fortification.
维生素D和其他维生素一样,是人体正常代谢功能所必需的微量营养素。它是指一组化合物,其中最重要的是D2(麦角钙化醇)和D3(胆钙化醇)。维生素D的获取有两个主要来源,在皮肤下层由阳光照射(90%)和饮食(10%)引发的合成。维生素D水平可以通过测量血清中25(OH)D的浓度来确定,缺乏维生素D会导致一系列问题,包括骨骼相关问题、抑郁症、糖尿病、自身免疫性疾病、心血管和呼吸系统问题、感染、自闭症和肥胖。体内的合成会受到多种因素的影响,包括肤色、年龄、生活方式、服装、天气,甚至是一般的健康文盲。在饮食方面,巴基斯坦人口的主食普遍缺乏维生素D。因此,很大一部分巴基斯坦人口,特别是妇女和儿童缺乏维生素D。讨论了克服这一问题需要解决的各种挑战,以及潜在的可行策略,如食品强化(例如通过微纳米封装技术)和生物强化。
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引用次数: 0
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Biomedical Letters
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