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Prevalence and Clinical Spectrum of Mycoplasma pneumoniae in Community-acquired Pneumonia 社区获得性肺炎肺炎支原体的流行及临床谱分析
Pub Date : 2023-03-30 DOI: 10.13005/bbra/3081
Mohd Kashif Ali, D. I. Khan, Akansha Mittal, Samreen Khan, Swaleha Akhtar
ABSTRACT: Introduction Community-acquired pneumonia has been a serious health issue, particularly among the pediatric age group, and is considered to be one of the major causes responsible for hospital admissions [1]. It is a substantial cause of respiratory illness and mortality in children in developing countries. It is a widespread bacterial pathogen that has been associated with a variety of clinical features, including pulmonary and extrapulmonary manifestations. But as diagnostic testing is typically based on serology or non-standardized molecular techniques, the prevalence and epidemiology of hospitalized community-acquired pneumonia (CAP) owing to Mycoplasma pneumoniae are poorly recognized [6]. Because of its ample prevalence and fatal complications, there is a need to identify cases of Mycoplasma pneumonia and treat them optimally to minimize the long-term consequences. Material and Method This study aims to recruit the cases of community-acquired pneumonia from the OPD and IPD of Jawahar Lal Nehru Medical College Hospital, AMU, Aligarh, for one year (October 2019–October 2020) in patients within 1–14 years of age and assess the prevalence of Mycoplasma pneumonia among them. Result Five (15.62%) of the total of thirty-two (100%) patients with community-acquired pneumonia had Mycoplasma pneumoniae infection diagnosed based on serology, with the majority of patients in the 1–5 year age group and variable clinical characteristics, with tachypnea, fever, and cough being the most prominent symptoms and diffuse reticular pattern and lobar consolidation being the most common radiological findings. Conclusions It has been concluded from the above study that the prevalence of Mycoplasma pneumoniae in community-acquired pneumonia cases based on serology is low. However, because serology is not 100% sensitive and specific, and titers can range from complete absence for the first 7 days to highly detectable after one week of illness, the diagnosis should not be ruled out solely based on serology. Owing to the severity of the disease, a differential diagnosis of M. pneumoniae must always be kept in mind.
社区获得性肺炎一直是一个严重的健康问题,尤其是在儿童年龄组中,被认为是导致住院的主要原因之一[1]。它是发展中国家儿童呼吸道疾病和死亡的一个重要原因。它是一种广泛存在的细菌病原体,与多种临床特征有关,包括肺和肺外表现。但由于诊断检测通常基于血清学或非标准化的分子技术,因此对肺炎支原体引起的住院社区获得性肺炎(CAP)的患病率和流行病学知之甚少[6]。由于其广泛的流行和致命的并发症,有必要确定肺炎支原体病例并对其进行最佳治疗,以尽量减少长期后果。材料与方法本研究旨在招募阿里格尔贾瓦哈尔·拉尔·尼赫鲁医学院附属医院门诊和IPD 1年(2019年10月- 2020年10月)1-14岁的社区获得性肺炎患者,评估其中肺炎支原体的患病率。结果32例(100%)社区获得性肺炎患者中有5例(15.62%)经血清学诊断为肺炎支原体感染,患者以1 ~ 5岁年龄组居多,临床特征多变,以呼吸急促、发热、咳嗽为主要症状,影像学表现以弥漫性网状和肺叶实变为最常见。结论基于血清学的社区获得性肺炎病例中肺炎支原体的患病率较低。然而,由于血清学不是100%的敏感和特异性,并且滴度可以从最初7天完全不存在到疾病一周后高度可检测到,因此不应仅根据血清学排除诊断。由于疾病的严重性,必须始终牢记肺炎支原体的鉴别诊断。
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引用次数: 0
Review on Microalgae Potential Innovative Biotechnological Applications 微藻创新生物技术应用前景综述
Pub Date : 2023-03-30 DOI: 10.13005/bbra/3066
Kelemu Mulluye, Yibrehu Bogale, Dilnesa Bayle, Yimeslal Atnafu
Novel compounds can be found in marine creatures, many of which have amazing biotechnological capabilities. Microalgae, in particular, have a drawn interest as a potential basis for new industrial creation routes. Many biologically active compounds, such as antioxidants, immunostimulants, antivirals, antibiotics, hem agglutinates, polyunsaturated fatty acids, peptides, proteins, biofuels, and pigments, are derived from these species. Recently, there has been a rise in interest in microalgal biotechnology to create beneficial, sustainable, and ecologically friendly bioproducts. Microalgae biomass is in high demand for a wide range of potential uses, most of which are now the subject of ongoing research. Microalgae are important groups of photosynthetic organisms that use light and carbon dioxide more efficiently than terrestrial plants to produce biomass and use it for biotechnological purposes such as environmental protection, biofuel production, pharmaceutical production, human food supplements, animal feed components, coronavirus treatments, and so on. This paper presents an overview of current advancements in the application of microalgal biotechnology in several industries.
在海洋生物中可以发现新的化合物,其中许多具有惊人的生物技术能力。特别是微藻,作为新的工业创造路线的潜在基础而引起了人们的兴趣。许多生物活性化合物,如抗氧化剂、免疫刺激剂、抗病毒药物、抗生素、凝血剂、多不饱和脂肪酸、多肽、蛋白质、生物燃料和色素,都是从这些物种中提取的。最近,人们对微藻生物技术的兴趣有所增加,以创造有益的、可持续的和生态友好的生物产品。微藻生物质的需求量很大,具有广泛的潜在用途,其中大多数是目前正在进行的研究课题。微藻是重要的光合生物类群,它们比陆生植物更有效地利用光和二氧化碳产生生物质,并将其用于生物技术目的,如环境保护、生物燃料生产、制药生产、人类食品补充剂、动物饲料成分、冠状病毒治疗等。本文综述了目前微藻生物技术在几个行业中的应用进展。
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引用次数: 1
Investigations and Characterization of Alkaline Protease-Producing Fermentibacillus sp. RSCVS-HS3 产碱性蛋白酶发酵杆菌RSCVS-HS3的研究与特性
Pub Date : 2023-03-30 DOI: 10.13005/bbra/3093
R. Chauhan, R. Mishra
ABSTRACT: The study's goal was to investigate and characterize alkaline protease-producing Fermentibacillus sp. RSCVS-HS3. The bacterium Fermentibacillus sp. RSCVS-HS3 was isolated from Vindhya region (Rewa division) of Madhya Pradesh of central India. It grew on casein-containing media at pH 12 and protease activity was found positive. . The enzyme was in a stable state in its crude form at 50℃ and pH 12, indicating thermal stability and the alkaline nature of the enzyme. It was rod-shaped, long, filamentous, gram-positive bacterium and was positive for casein hydrolysis. Based on NCBI BLAST and Phylogenetic Analysis of 16s rRNA, it was identified as Fermentibacillus sp. RSCVS-HS3. This is probably the first study to date, stating the alkaline protease synthesis from any Fermentibacillus species. It was closest to Fermentibacilolus polygoni IEB3 but in contrast to this, the identified bacterium showed casein hydrolysis. This is probably the first study to date, stating the alkaline protease synthesis from any Fermentibacillus species.
摘要:本研究旨在研究产碱性蛋白酶发酵杆菌RSCVS-HS3的特性。发酵杆菌sp. RSCVS-HS3分离自印度中部中央邦Vindhya地区(Rewa区)。在pH为12的含酪蛋白培养基上生长,蛋白酶活性呈阳性。酶在50℃、pH为12的条件下处于稳定状态,表明酶具有热稳定性和碱性。它是杆状,长,丝状,革兰氏阳性细菌,酪蛋白水解阳性。基于NCBI BLAST和16s rRNA的系统发育分析,鉴定菌株为Fermentibacillus sp. RSCVS-HS3。这可能是迄今为止第一个从发酵杆菌中合成碱性蛋白酶的研究。它与polygoni Fermentibacilolus IEB3最接近,但与此相反,鉴定的细菌表现出酪蛋白水解。这可能是迄今为止第一个从发酵杆菌中合成碱性蛋白酶的研究。
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引用次数: 0
Nanotechnology in Plastic Degradation 纳米技术在塑料降解中的应用
Pub Date : 2023-03-30 DOI: 10.13005/bbra/3068
R. Chandran, Benjamin Isaac Thomson, A. J. Natishah, Jennita Mary, V. Nachiyar
Plastics pose a huge threat to the environment. Plastic accumulation in the land and the seas is now the world’s most terrorising problem, mainly because of its non-degrading character. Plastic degradation has always been a next to impossible concept in the field of science, but nanotechnology provides a revolutionary and modern way to solve the problem of plastic accumulation in the environment. One of the great advantages of nanoparticles is that we can increase and decrease the rate of biodegradation depending on our needs. Nanoparticles enhance the polythene degradation capacity of the microorganisms by altering their metabolic cycles. Numerous studies showed conclusively that the incorporation of nanotechnology enhances the ability of microorganisms to degrade polythene materials. Even though bio degradable plastics are nowadays produced in large quantities to substitute polythene materials, they fail to match the brittleness of plastics. Biodegradable plastics have poor thermal, mechanical and low gas barrier qualities, which are their main drawbacks. To overcome this, nanoparticles are incorporated into the biopolymers. If an appropriate balance between nanotechnology, microbiology and biotechnology is found, plastic degradation can be done economically and feasibly in all the areas.
塑料对环境构成巨大威胁。陆地和海洋中的塑料堆积现在是世界上最可怕的问题,主要是因为它的非降解特性。塑料降解在科学领域一直是一个近乎不可能的概念,但纳米技术为解决塑料在环境中的积累问题提供了一种革命性的现代方法。纳米粒子的一大优点是我们可以根据自己的需要来提高或降低生物降解的速度。纳米颗粒通过改变微生物的代谢循环来增强其降解聚乙烯的能力。大量研究表明,纳米技术的加入增强了微生物降解聚乙烯材料的能力。尽管生物可降解塑料现在被大量生产以取代聚乙烯材料,但它们无法与塑料的脆性相匹配。可生物降解塑料的主要缺点是热、机械和气体阻隔性差。为了克服这个问题,纳米粒子被加入到生物聚合物中。如果在纳米技术、微生物学和生物技术之间找到适当的平衡,塑料降解可以在所有领域进行经济和可行的。
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引用次数: 1
Effect of the Anticancer Drug Doxorubicin (Adriamycin) on Antioxidant Studies and Ultrastructural Investigation in the Liver, Kidney, and Heart Tissues of Male Rats 抗癌药物阿霉素对雄性大鼠肝、肾、心脏组织抗氧化及超微结构的影响
Pub Date : 2023-03-30 DOI: 10.13005/bbra/3089
S. M. Kewedar
Doxorubicin is a well-known antineoplastic agent that has proved to be successful in the treatment of various types of cancer. I used rats as the model to evaluate the effect of doxorubicin on antioxidant studies and ultrastructural investigations in the liver, kidney, and heart tissues. Male albino rats were given 1.0 mg/kg body weight of the anticancer drug doxorubicin intraperitoneally three times a week for 52 days. This was for a total of 18 doses. Control animals received 52 doses of 0.5 ml of saline over 52 days. The body weights of rats injected with doxorubicin experienced a significant decrease after the last dose compared to the control group of rats. In this study, the weights of the heart, kidneys, and liver were measured. Except for cardiac tissues, the protein content in the aforementioned tissues in treated rats was significantly different from the control. Glutathione (GSH) levels in the kidneys of experimental rats were not significantly lower (7.946 ± 0.781) compared to controls (8.06 ± 0.74) but there was a non-significant increase in GSH levels in the liver (17.095 ± 1.066) compared to controls (13.8 ± 1.3). In addition, the mean GSH levels in doxorubicin-treated hearts were significantly lower (7.9462 ± 0.781) compared to controls (8.06 ± 0.74). Lipid peroxidation (Lpx) and malondialdehyde content (MDA), a marker of lipid peroxidation, were found in much lower concentrations in the liver organ of the doxorubicin-treated group (0.0162 ± 0.00086) as compared to (0.20 ± 0.02) controls, and MDA content in the kidney was decreased (0.0239 ± 0.0003) compared to control rats (0.31 ± 0.03), as well as heat production (0.0398 ± 0.00097) compared to (47.451 ± 1.708) controls. Glutathione reductase (GR) levels were significantly elevated in the same tissue treatment group. Glutathione-S-Transferase (G-S-T) activity was assessed and significantly increased in all tissues in the doxorubicin model. Glutathione peroxidase (GPx) activity showed a significant decrease in all the above tissues after doxorubicin injection. The catalase (CAT) activity of doxorubicin was greatly increased in one treated rat. In the doxorubicin-treated group, levels of cytochrome p450 (CYTp450) were significantly decreased in liver and kidney tissue and significantly elevated in heart tissue. After doxorubicin treatment, cytochrome b5 (CYTb5) levels in liver tissues increased significantly (837.177± 61.197) compared to controls (615 ± 37.0), and the contents of cytochrome b5 in rats' kidneys increased significantly (447.685 ± 35.215) compared to controls (2605.5± 259.2). and cytochrome b5 in heart tissues was lower (165.352± 8.7) when compared to controls (88± 0.4). The results showed that there were few obvious changes in histological, ultrastructural, and biochemical changes in liver tissue in the doxorubicin model. Long-term doxorubicin treatment in kidney tissue results in no significant changes at the light microscopic level, but the electron microscopic lev
阿霉素是一种众所周知的抗肿瘤药物,已被证明在治疗各种类型的癌症方面是成功的。我以大鼠为模型,评价阿霉素对肝脏、肾脏和心脏组织的抗氧化研究和超微结构的影响。雄性白化大鼠腹腔注射抗癌药物阿霉素1.0 mg/kg体重,每周3次,连续52天。这是总共18剂的数据。对照动物在52天内接受52次生理盐水,每次0.5 ml。与对照组大鼠相比,注射阿霉素的大鼠在最后一次剂量后体重明显下降。在这项研究中,测量了心脏、肾脏和肝脏的重量。除心脏组织外,治疗大鼠上述组织的蛋白质含量均与对照组有显著差异。实验大鼠肾脏谷胱甘肽(GSH)水平(7.946±0.781)与对照组(8.06±0.74)相比没有显著降低,但肝脏谷胱甘肽(GSH)水平(17.095±1.066)与对照组(13.8±1.3)相比无显著升高。此外,阿霉素治疗组的平均GSH水平(7.9462±0.781)明显低于对照组(8.06±0.74)。脂质过氧化(Lpx)和丙二醛(MDA)(脂质过氧化的标志物)在阿霉素治疗组的肝脏器官中的浓度(0.0162±0.00086)与对照组(0.20±0.02)相比明显降低,肾脏中的MDA含量(0.0239±0.0003)与对照组(0.31±0.03)相比降低,产热(0.0398±0.00097)与对照组(47.451±1.708)相比降低。同一组织处理组谷胱甘肽还原酶(GR)水平显著升高。评估谷胱甘肽- s -转移酶(G-S-T)活性,并在阿霉素模型的所有组织中显著升高。注射阿霉素后,上述组织中谷胱甘肽过氧化物酶(GPx)活性均显著降低。阿霉素处理后的大鼠过氧化氢酶(CAT)活性明显升高。在阿霉素治疗组中,肝脏和肾脏组织中细胞色素p450 (CYTp450)水平显著降低,心脏组织中细胞色素p450水平显著升高。阿霉素处理后,大鼠肝脏组织细胞色素b5 (CYTb5)水平较对照组(615±37.0)显著升高(837.177±61.197),肾脏细胞色素b5含量较对照组(2605.5±259.2)显著升高(447.685±35.215)。心肌组织细胞色素b5(165.352±8.7)低于对照组(88±0.4)。结果显示,阿霉素模型大鼠肝组织组织学、超微结构及生化变化均未见明显变化。长期应用阿霉素治疗肾组织在光镜下无明显变化,但电镜下从组织学角度看无变化。
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引用次数: 0
Isolation and Characterization of Protease Inhibitors with Antimicrobial Activity from Sirisa (Albizia lebbeck) Seed Protein Extract 小檗种子蛋白提取物中具有抗菌活性的蛋白酶抑制剂的分离与鉴定
Pub Date : 2023-03-30 DOI: 10.13005/bbra/3071
Rutwika S. Thete, S. Roushani, F. Shaikh, Jyoti Kulkarni, R. H. L
The present study aimed to identify protease inhibitors (PIs) with antimicrobial activity from sirisa (Albizia lebbeck) seed protein extracts that may be a natural alternative to overcome multi-drug resistance, toxicity, and side effects of existing antimicrobial drugs. The crude PIs were extracted from seeds of A. lebbeck in 1% PVP and further partially purified by ammonium sulphate (NH4)2SO4 fractionation. The total protein content was found to be high in 0-30 % (NH4)2SO4 saturated protein fraction F1 (7.3 ± 0.17 mg/ml). Reasonably high PI activity towards trypsin was observed in 60–90 % (NH4)2SO4 saturated fraction F3 assessed by the agar well diffusion method and in vitro solution assay. Electrophoretic profiling of proteins from the F3 fraction showed nine bands on the gel with differential mobility. The presence of a zone of inhibition (ZOI) for different concentrations of F3- 60–90 % (NH4)2SO4 saturated PIs on agar plate demonstrated antimicrobial activity against E.coli, S. aureus, and P. aeruginosa with MIC values of 100 ± 5 µg/ml, 100 ± 4 µg/ml, and 90 ± 3 µg/ml respectively. Our results indicate that PIs from seeds of sirisa display potent antimicrobial activity against the tested microorganisms and could be investigated further in the future use in designing or formulating natural antimicrobial drugs to treat microbial infection-related diseases.
本研究旨在从茜草(Albizia lebbeck)种子蛋白提取物中鉴定具有抗菌活性的蛋白酶抑制剂(PIs),这些抑制剂可能是克服现有抗菌药物多重耐药、毒性和副作用的天然替代品。从白参种子中提取粗pi,在1% PVP条件下,用硫酸铵(NH4)2SO4分馏提纯部分pi。总蛋白含量在0 ~ 30% (NH4)2SO4饱和蛋白组分F1中较高(7.3±0.17 mg/ml)。琼脂孔扩散法和体外溶液法测定了60 - 90% (NH4)2SO4饱和组分F3对胰蛋白酶具有较高的PI活性。F3蛋白的电泳分析显示,凝胶上有9条具有不同迁移率的条带。不同浓度的F3- 60 - 90% (NH4)2SO4饱和的PIs在琼脂平板上存在抑制区(ZOI),对大肠杆菌、金黄色葡萄球菌和铜绿假单胞菌的抑菌活性分别为100±5µg/ml、100±4µg/ml和90±3µg/ml。我们的研究结果表明,从sirisa种子中提取的pi对所测试的微生物显示出有效的抗菌活性,可以在未来的研究中进一步用于设计或配制天然抗菌药物来治疗微生物感染相关疾病。
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引用次数: 0
Isolation and Characterization of Anticancer Compound Producing Marine Paenibacillus lentimorbus SAGM 3 Collected from a Sea Anemone, Heteractis species 海洋慢芽孢杆菌SAGM - 3抗癌化合物的分离与鉴定
Pub Date : 2023-03-30 DOI: 10.13005/bbra/3069
Nagamuthu Vinothkumar, P. Pugalendhi
Sea anemone-associated bacteria were considered promising candidates for the synthesis of many novel bioactive compounds. Thus culturable symbiotic bacteria that exist in the sea anemones met much attention when compared to other benthic marine dwellers. In this study, an attempt was made to explore the anticancer potentials of symbiotic bacteria isolated from a sea anemone, Heteractis species. Nine symbiotic bacteria were isolated, pure cultured and screened for their anticancer potential using two breast cancer cell lines. Among the strains, SAGM 3 showed appreciable growth inhibition activity of 43.1% and 47.1% against the studied cell lines, viz. MCF7 and MDA-MB-231 and this strain was selected for further studies. Based on the 16S rRNA molecular profiling, the SAGM 3 isolate was noted as Paenibacillus lentimorbus and the sequence of SAGM 3 was deposited in GeneBank with the accession number MW737456.1. During the growth kinetics profiling, maximum bacterial growth rate and anticancer activities were recorded from 60 to 96 hrs of incubation. The present investigation provides baseline data understanding the pharmaceutical significance of a symbiotic marine bacterium procured from the sea anemone, Heteractis species.
海葵相关细菌被认为是合成许多新型生物活性化合物的有希望的候选者。因此,与其他底栖海洋生物相比,存在于海葵中的可培养共生细菌受到了更多的关注。本研究旨在探讨从海葵中分离的共生菌的抗癌潜力。利用两株乳腺癌细胞系分离、纯培养和筛选9种共生菌的抗癌潜力。其中,SAGM 3对MCF7和MDA-MB-231细胞株的生长抑制活性分别为43.1%和47.1%,选择该菌株进行进一步研究。根据16S rRNA分子图谱,鉴定该分离株为慢芽孢杆菌,并将其序列存入GeneBank,登录号为MW737456.1。在生长动力学分析过程中,从培养60到96小时记录了最大细菌生长速率和抗癌活性。本研究为了解从海葵(Heteractis)中提取的一种共生海洋细菌的药物意义提供了基础数据。
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引用次数: 0
Preparation and In vitro Characterization of Valerianic Acid Loaded Polymeric Nanoparticles 载戊酸聚合物纳米颗粒的制备及体外表征
Pub Date : 2023-03-30 DOI: 10.13005/bbra/3075
S. I. Pasha, Aliya Meraj, Arshiya Meraj, A. Mohammed, Akifa Tanzil, Anam Fatima, Anupama Koneru
This article describe the preparation of valerianic acid loaded HPMC nanoparticles (NPs) using the nano-precipitation method. Objective of this study include enhancement of the dissolution rate of the poorly water soluble drug(Valerenic acid obtained from Valerianawallichii), and further more to look into the in vitro properties, zeta potential and surface characteristics of nanoparticles (percent yield of nanoparticles, percent encapsulation efficiency and in vitro release characteristics).In phosphate buffer medium at pH 6.8, the cumulative drug release from the original drug and nanoparticles were up to about 12% and 35%, respectively. Valerianic acid release can be enhanced by the use of nanoparticles loaded with hydroxy propyl methyl cellulose (HPMC), that also enhances bioavailability and patient compliance.
本文介绍了用纳米沉淀法制备载戊酸的HPMC纳米粒子。本研究的目的是提高难水溶性药物缬草酸的溶出率,进一步研究纳米颗粒的体外性质、zeta电位和表面特性(纳米颗粒得率、包封率和体外释放特性)。在pH为6.8的磷酸盐缓冲介质中,原药和纳米颗粒的累积药物释放量分别高达12%和35%左右。使用含有羟丙基甲基纤维素(HPMC)的纳米颗粒可以增强缬草酸的释放,这也提高了生物利用度和患者的依从性。
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引用次数: 0
Phylogenetic Analysis of the Economically Important Hymenopterans using cytochrome oxidase 1 Enzyme Sequences 利用细胞色素氧化酶1酶序列分析膜翅目昆虫的系统发育
Pub Date : 2023-03-30 DOI: 10.13005/bbra/3073
Charul Charul, Sunali Bandral, Shivalika Shivalika, V. Dogra, M. Feroz, Umer Bin Farook, R. K. Panjaliya
Hymenoptera is the fourth diverse and the most economically important insect order comprising of bees, wasps, ants, sawflies etc. Being an important part of ecosystem, their conservation is of utmost importance. The first step towards conservation strategies is the identification of the species. The traditional morphological approach can sometimes lead to misidentification due to a lack of expertise. DNA barcoding using the small genomic fragments has been identified as an efficient tool in the identification as well as the phylogenetic analysis of the species. In the present study, we used the COI gene sequences as a tool for the characterization of Hymenoptera from different parts of the Jammu region. The collected samples were proceeded for the isolation of DNA, PCR for amplification of the COI gene, and then sequenced by Sanger dideoxy method. A total of 22 COI sequences belonging to 18 different species were successfully generated. Among which eight species sequences (Tachytes sp., Bombus trifasciatus, Rhynchium carnaticum, Ropalidia brevita, Lasioglossum marginatum, Camponotus pennsylvanicus, Tapinoma melanocephalum, Formica rufibarbis) are the novel contribution in the global database. NJ tree using the K2P model with 1000 bootstrap supporting values has been used to study the phylogeny of the species. Sequence analysis shows high AT content (67-77%) in the COI region of Hymenopterans. The generated COI sequence analysis also revealed less than 1% intra-specific divergence in the examined taxa, while the interspecific distances ranged between 8% to 38%. This study added significantly to the databases of DNA barcodes of Hymenopterans species from Jammu region.
膜翅目昆虫包括蜜蜂、黄蜂、蚂蚁、锯蝇等,是第四种昆虫,也是经济上最重要的昆虫目。作为生态系统的重要组成部分,保护它们至关重要。保护策略的第一步是确定物种。由于缺乏专业知识,传统的形态学方法有时会导致错误识别。利用基因组小片段的DNA条形码已被确定为物种鉴定和系统发育分析的有效工具。在本研究中,我们使用COI基因序列作为鉴定查谟地区不同地区膜翅目昆虫的工具。采集标本进行DNA分离,PCR扩增COI基因,然后用桑格二脱氧法进行测序。共生成了18个不同种的22条COI序列。其中8个物种序列(Tachytes sp., Bombus trifasciatus, Rhynchium carnaticum, Ropalidia brevita, Lasioglossum marginatum, Camponotus pennsylvanicus, Tapinoma melanocephalum, Formica rufibarbis)是全球数据库的新贡献。采用K2P模型的NJ树(带1000个自举支持值)对物种的系统发育进行了研究。序列分析显示膜翅目昆虫COI区AT含量较高(67 ~ 77%)。生成的COI序列分析还显示,在所研究的分类群中,种内差异小于1%,而种间距离在8%至38%之间。该研究对查谟地区膜翅目昆虫的DNA条形码数据库有重要的补充作用。
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引用次数: 0
Prognostic Potential of Argyrophillic Nucleolar Organizer Regions (Agnors) in Oral Lesions: A Systematic Review 口腔病变中亲银核仁组织区(Agnors)的预后潜力:一项系统综述
Pub Date : 2022-12-20 DOI: 10.13005/bbra/3036
Shafali Singh, D. Bhargava, Sheeba Ali, Richa Mishra, V. Chandavarkar
Early detection of oral squamous cell carcinoma (OSCC) and oral potentially malignant disorders (OPMD) is important for dental professionals to improve patient survival rates. More than half of patients with oral squamous cell cancer had advanced disease at the time of diagnosis, indicating a lack of early detection and risk assessment biomarkers. The development of new protein biomarkers will help in early diagnosis and treatment.The argyrophilic nucleolar organiser regions (AgNORs) staining technique is simple and cost-effective. These are replicatory markers that identify epithelial dysplasia. And it also plays a very important role in differentiating the benign, pre-malignant, and malignant lesions of the oral cavity. The number of AgNORs per cell has been considered an indicator of cellular proliferative activity. Microscopically, NORs can be identified as well-defined black dots located throughout the cell nucleus. The agNOR quantity is strictly proportional to the proliferative activity of the cell. AgNOR quantification helps in the determination of the degree of epithelial dysplasia and, consequently, in the analysis of its potential for malignant transformation. AgNOR qualitative characteristics help in differentiating hyperplastic, premalignant, and malignant oral lesions. The sliver staining technique is useful for studying the structure of the nucleolus as well as the variations in its activity. AgNORs are a valuable parameter in tumour pathology.
口腔鳞状细胞癌(OSCC)和口腔潜在恶性疾病(OPMD)的早期检测对牙科专业人员提高患者生存率非常重要。超过一半的口腔鳞状细胞癌患者在诊断时病情已经进展,这表明缺乏早期发现和风险评估的生物标志物。新的蛋白质生物标志物的开发将有助于早期诊断和治疗。亲银核仁组织者区(AgNORs)染色技术简单,成本效益高。这些是识别上皮发育不良的复制标记。它在鉴别口腔的良性、癌前和恶性病变方面也起着非常重要的作用。每个细胞的AgNORs数量被认为是细胞增殖活性的一个指标。显微镜下,NORs可以被识别为分布在细胞核中的定义明确的黑点。agNOR的数量与细胞的增殖活性严格成正比。AgNOR定量有助于确定上皮异常增生的程度,从而分析其恶性转化的可能性。AgNOR的定性特征有助于鉴别增生性、癌前病变和恶性口腔病变。银染色技术可用于研究核仁的结构及其活性的变化。AgNORs在肿瘤病理学中是一个有价值的参数。
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Biosciences, Biotechnology Research Asia
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