Saudi Journal of Biological Sciences最新文献

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Microbiological risk assessment and resistome analysis from shotgun metagenomics of bovine colostrum microbiome 从牛初乳微生物组的散弹枪元基因组学中进行微生物风险评估和抗性组分析
IF 4.4 2区 生物学
Saudi Journal of Biological Sciences Pub Date : 2024-02-16 DOI: 10.1016/j.sjbs.2024.103957
Muhammad Yasir , Ibrahim A. Al-Zahrani , Raees Khan , Samah Abdullah Soliman , Safaa A. Turkistani , Maha Alawi , Esam I. Azhar
{"title":"Microbiological risk assessment and resistome analysis from shotgun metagenomics of bovine colostrum microbiome","authors":"Muhammad Yasir ,&nbsp;Ibrahim A. Al-Zahrani ,&nbsp;Raees Khan ,&nbsp;Samah Abdullah Soliman ,&nbsp;Safaa A. Turkistani ,&nbsp;Maha Alawi ,&nbsp;Esam I. Azhar","doi":"10.1016/j.sjbs.2024.103957","DOIUrl":"https://doi.org/10.1016/j.sjbs.2024.103957","url":null,"abstract":"<div><p>Colostrum is known for its nutraceutical qualities, probiotic attributes, and health benefits. The aim of this study was to profile colostrum microbiome from bovine in rural sites of a developing country. The focus was on microbiological safety assessments and antimicrobial resistance, taking into account the risks linked with the consumption of raw colostrum. Shotgun sequencing was employed to analyze microbiome in raw buffalo and cow colostrum. Alpha and beta diversity analyses revealed increased inter and intra-variability within colostrum samples' microbiome from both livestock species. The colostrum microbiome was mainly comprised of bacteria, with over 90% abundance, whereas fungi and viruses were found in minor abundance. Known probiotic species, such as <em>Leuconostoc mesenteroides</em>, <em>Lactococcus lactis</em>, <em>Streptococcus thermophilus</em>, and <em>Lactobacillus paracasei</em>, were found in the colostrum samples. A relatively higher number of pathogenic and opportunistic pathogenic bacteria were identified in colostrum from both animals, including clinically significant bacteria like <em>Clostridium botulinum</em>, <em>Pseudomonas aeruginosa</em>, <em>Escherichia coli</em>, and <em>Listeria monocytogenes</em>. Binning retrieved 11 high-quality metagenome-assembled genomes (MAGs), with three MAGs potentially representing novel species from the genera <em>Psychrobacter</em> and <em>Pantoea</em>. Notably, 175 antimicrobial resistance genes (ARGs) and variants were detected, with 55 of them common to both buffalo and cow colostrum metagenomes. These ARGs confer resistance against aminoglycoside, fluoroquinolone, tetracycline, sulfonamide, and peptide antibiotics. In conclusion, this study describes a thorough overview of microbial communities in buffalo and cow colostrum samples. It emphasizes the importance of hygienic processing and pasteurization in minimizing the potential transmission of harmful microorganisms linked to the consumption of colostrum.</p></div>","PeriodicalId":21540,"journal":{"name":"Saudi Journal of Biological Sciences","volume":"31 4","pages":"Article 103957"},"PeriodicalIF":4.4,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1319562X24000354/pdfft?md5=35da16d6cfac71e6a7fa5bb613ff91a7&pid=1-s2.0-S1319562X24000354-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139908517","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Diversity of endophytic fungi from medicinal plant Oxalis latifolia and their antimicrobial potential against selected human pathogens 药用植物牛樟芝内生真菌的多样性及其对某些人类病原体的抗菌潜力
IF 4.4 2区 生物学
Saudi Journal of Biological Sciences Pub Date : 2024-02-15 DOI: 10.1016/j.sjbs.2024.103958
J.M. Hussein, H. Myovela, D.D. Tibuhwa
{"title":"Diversity of endophytic fungi from medicinal plant Oxalis latifolia and their antimicrobial potential against selected human pathogens","authors":"J.M. Hussein,&nbsp;H. Myovela,&nbsp;D.D. Tibuhwa","doi":"10.1016/j.sjbs.2024.103958","DOIUrl":"10.1016/j.sjbs.2024.103958","url":null,"abstract":"<div><p>Endophytic fungi that inhabit medicinal plants are microbial resources renowned for having compounds analogous to those produced by their host plants. This study aimed to describe the diversity of endophytic fungi found in <em>Oxalis latifolia</em> Kunth. To better understand the diversity of foliar endophytic fungi found in the leaves of the medicinal plant <em>Oxalis latifolia</em>, we isolated and characterized endophytic by using both morphological and molecular methods employing ITS markers. The antimicrobial activity of endophytic fungi against common human pathogens <em>Escherichia coli, Staphylococcus aureus,</em> and <em>Bacillus subtilis</em> was also investigated. A Total of 16 endophytic fungi were successfully isolated from leaves and classified into five orders of Pezizomycotina based on the phylogenic analyses; <em>Xylariales</em> (56%)<em>, Diaporthales</em> (19%) <em>Sordariales</em> (6%)<em>, Glomerellales</em> (13%) and <em>Botryosphaeriales</em> (6%). The antimicrobial activity of crude extracts from fungal endophyte against <em>Escherichia coli, Staphylococcus aureus</em>, and <em>Bacillus subtilis</em> revealed that three isolates; <em>N. aurantiaca, Phyllosticta capitalensis N. oryzae</em> were the most potent, while <em>Colletotrichum karstii</em> and <em>N. sphaerica</em> displayed no growth inhibition property against the tested organism. The diversity indices were calculated by using the Shannon-Wiener, Margalef, and Simpson indices. The diversity indices analysis revealed an abundance of species diversity, where the dominant species were <em>Nigrospora oryzae</em>, <em>N. sphaerica,</em> and <em>Colletotrichum karstii.</em> This study describes the diversity of endophytic fungi found in <em>O. latifolia</em> and emphasizes their potential as a source of novel bioactive compounds. More research on phytochemical composition and antimicrobial activity is ongoing to correlate the traditional uses and scientific findings.</p></div>","PeriodicalId":21540,"journal":{"name":"Saudi Journal of Biological Sciences","volume":"31 4","pages":"Article 103958"},"PeriodicalIF":4.4,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1319562X24000366/pdfft?md5=e39fb7e1b2d6a091e7aba869da06557e&pid=1-s2.0-S1319562X24000366-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139883259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Insights into cucumber (Cucumis sativus) genetics: Genome-wide discovery and computational analysis of the Calreticulin Domain-Encoding gene (CDEG) family 黄瓜(Cucumis sativus)遗传学透视:钙调蛋白域编码基因(CDEG)家族的全基因组发现与计算分析
IF 4.4 2区 生物学
Saudi Journal of Biological Sciences Pub Date : 2024-02-13 DOI: 10.1016/j.sjbs.2024.103959
Pravej Alam, Thamer Albalawi
{"title":"Insights into cucumber (Cucumis sativus) genetics: Genome-wide discovery and computational analysis of the Calreticulin Domain-Encoding gene (CDEG) family","authors":"Pravej Alam,&nbsp;Thamer Albalawi","doi":"10.1016/j.sjbs.2024.103959","DOIUrl":"https://doi.org/10.1016/j.sjbs.2024.103959","url":null,"abstract":"<div><p>Cucumber is an essential vegetable crop throughout the world. Cucumber development is vital for accomplishing both quality and productivity requirements. Meanwhile, numerous factors have resulted in substantial cucumber losses. However, the calreticulin domain-encoding genes (CDEGs) in cucumber were not well-characterized and had little function. In the genome-wide association study (GWAS), we recognized and characterized the CDEGs in <em>Cucumis sativus</em> (cucumber). Through a comprehensive study of <em>C. sativus</em>, our research has unveiled the presence of three unique genes, denoted as <em>CsCRTb, CsCRT3,</em> and <em>CsCNX1</em>, unevenly distributed on three chromosomes in the genome of <em>C. sativus</em>. In accordance to the phylogenetic investigation, these genes may be categorized into three subfamilies. Based on the resemblance with AtCDE genes, we reorganized the all <em>CsCDE</em> genes in accordance with international nomenclature. The expression analysis and <em>cis</em>-acting components revealed that each of <em>CsCDE</em> gene promoter region enclosed number of <em>cis</em>-elements connected with hormone and stress response. According to subcellular localization studies demonstrated that, they were found in deferent locations of the cell such as endoplasmic reticulum, plasma membrane, golgi apparatus, and vacuole, according to subcellular localization studies. Chromosomal distribution analysis and synteny analysis demonstrated the probability of segmental or tandem duplications within the cucumber CDEG gene family. Additionally, miRNAs displayed diverse modes of action, including mRNA cleavage and translational inhibition. We used the RNA seq data to analyze the expression of CDEG genes in response to cold stress and also improved cold tolerance, which was brought on by treating cucumber plants to an exogenous chitosan oligosaccharide spray. Our investigation revealed that these genes responded to this stress in a variety of ways, demonstrating that they may adapt quickly to environmental changes in cucumber plants. This study provides a base for further understanding in reference to CDE gene family and reveals that genes play significant functions in cucumber stress responses.</p></div>","PeriodicalId":21540,"journal":{"name":"Saudi Journal of Biological Sciences","volume":"31 4","pages":"Article 103959"},"PeriodicalIF":4.4,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1319562X24000378/pdfft?md5=af04d40cdd24ce47ca09b106110d5394&pid=1-s2.0-S1319562X24000378-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139748458","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
IC - Editorial Board IC - 编辑委员会
IF 4.4 2区 生物学
Saudi Journal of Biological Sciences Pub Date : 2024-02-12 DOI: 10.1016/S1319-562X(24)00027-5
{"title":"IC - Editorial Board","authors":"","doi":"10.1016/S1319-562X(24)00027-5","DOIUrl":"https://doi.org/10.1016/S1319-562X(24)00027-5","url":null,"abstract":"","PeriodicalId":21540,"journal":{"name":"Saudi Journal of Biological Sciences","volume":"31 3","pages":"Article 103949"},"PeriodicalIF":4.4,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1319562X24000275/pdfft?md5=f857653bdb30f95746a72a8dffa1a7fb&pid=1-s2.0-S1319562X24000275-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139719573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Preparation and evaluation of antidiabetic activity of mangiferin-loaded solid lipid nanoparticles 负载芒果苷的固体脂质纳米颗粒的制备和抗糖尿病活性评价
IF 4.4 2区 生物学
Saudi Journal of Biological Sciences Pub Date : 2024-02-08 DOI: 10.1016/j.sjbs.2024.103946
Ahmed I. Foudah, Mohammad Ayman Salkini, Mohammed H. Alqarni, Aftab Alam
{"title":"Preparation and evaluation of antidiabetic activity of mangiferin-loaded solid lipid nanoparticles","authors":"Ahmed I. Foudah,&nbsp;Mohammad Ayman Salkini,&nbsp;Mohammed H. Alqarni,&nbsp;Aftab Alam","doi":"10.1016/j.sjbs.2024.103946","DOIUrl":"https://doi.org/10.1016/j.sjbs.2024.103946","url":null,"abstract":"<div><p>This study aimed to develop and optimize mangiferin-loaded solid lipid nanoparticles (MG-SLNs) using the microemulsion technique and ultrasonication. The MG-SLNs were composed of Labrafil M 2130 CS, MG, ethanol, Tween 80, and water. The optimized MG-SLNs exhibited a particle size of 138.37 ± 3.39 nm, polydispersity index of 0.247 ± 0.023, entrapment efficiency of 84.37 ± 2.43 %, and zeta potential of 18.87 ± 2.42 mV. Drug release studies showed a two-fold increase in the release of MG from SLNs compared to the solution. Confocal images indicated deeper permeation of MG-SLNs, highlighting their potential. Molecular docking confirmed mangiferin's inhibitory activity against α-amylase, consistent with previous findings. In vitro studies showed that MG-SLNs inhibited α-amylase activity by 55.43 ± 6.11 %, α-glucosidase activity by 68.76 ± 3.14 %, and exhibited promising antidiabetic activities. In a rat model, MG-SLNs significantly and sustainably reduced blood glucose levels for up to 12 h. Total cholesterol and triglycerides decreased, while high-density lipoprotein cholesterol increased. Both MG-SOL and MG-SLNs reduced SGOT and SGPT levels, with MG-SLNs showing a more significant reduction in SGOT compared to MG-SOL. Overall, the biochemical results indicated that both formulations improved diabetes-associated alterations. In conclusion, the study suggests that loading MG in SLNs using the newly developed approach could be an efficient oral treatment for diabetes, offering sustained blood glucose reduction and positive effects on lipid profiles and liver enzymes.</p></div>","PeriodicalId":21540,"journal":{"name":"Saudi Journal of Biological Sciences","volume":"31 4","pages":"Article 103946"},"PeriodicalIF":4.4,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1319562X2400024X/pdfft?md5=1e8800339e23e3004256a92b1cecebce&pid=1-s2.0-S1319562X2400024X-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139743231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Coproduction of alkaline protease and xylanase from genetically modified Indonesian local Bacillus halodurans CM1 using corncob as an inducing substrate 以玉米芯为诱导底物从转基因印尼本地卤化芽孢杆菌 CM1 共生碱性蛋白酶和木聚糖酶
IF 4.4 2区 生物学
Saudi Journal of Biological Sciences Pub Date : 2024-02-05 DOI: 10.1016/j.sjbs.2024.103947
I Gede Eka Perdana Putra , Maria Ulfah , Niknik Nurhayati , Is Helianti
{"title":"Coproduction of alkaline protease and xylanase from genetically modified Indonesian local Bacillus halodurans CM1 using corncob as an inducing substrate","authors":"I Gede Eka Perdana Putra ,&nbsp;Maria Ulfah ,&nbsp;Niknik Nurhayati ,&nbsp;Is Helianti","doi":"10.1016/j.sjbs.2024.103947","DOIUrl":"https://doi.org/10.1016/j.sjbs.2024.103947","url":null,"abstract":"<div><p>The production of corn generates a substantial amount of agro-industrial waste, with corncob accounting for a significant portion of this waste. In this study, we focused on utilizing corncob as a carbon source and inducer to simultaneously produce two valuable industrial enzymes, protease, and xylanase, using a recombinant strain of <em>B. halodurans</em> CM1. Interestingly, xylan-rich corncob not only enhanced the xylanase activity but also induced protease activity of the modified <em>B. halodurans</em> CM1 strain. The effect of corncob concentration on the coproduction of protease and xylanase was investigated. Corncob with 6 % concentration induced protease activity of 1020.7 U/mL and xylanase activity of 502.8 U/mL in a 7 L bioreactor under the condition of 1 vvm aeration, 250 rpm agitation, 37 °C temperature, initial pH 9.0, and 40 h incubation period. The protease produced was an alkalothermophilic enzyme whose highest activity was at pH 12 and 50 °C, and it belonged to a serine protease family. This alkalothermophilic protease’s activity to some degree was reduced by Co<sup>2+</sup>, Mg<sup>2+</sup>, Fe<sup>2+</sup>, Zn<sup>2+</sup>, and K<sup>+</sup>, but enhanced by Ca<sup>2+</sup> and Ni<sup>2+</sup> (at 5 mM). The protease was stable even under the presence of a 15 % concentration of acetone, DMSO, ethanol, and isopropyl alcohol. The protease activity at 30 °C was not considerably changed by the presence of detergent, indicating excellent potential as a washing detergent additive. According to these findings, corncob has the potential to be a substrate for the coproduction of protease and xylanase, which have a wide range of industrial uses.</p></div>","PeriodicalId":21540,"journal":{"name":"Saudi Journal of Biological Sciences","volume":"31 4","pages":"Article 103947"},"PeriodicalIF":4.4,"publicationDate":"2024-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1319562X24000251/pdfft?md5=30d60f0d31ba2a8c12688e5da7c10d31&pid=1-s2.0-S1319562X24000251-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139713716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
In-silico characterization of GABAT protein found in gut-brain axis associated bacteria of healthy individuals and multiple sclerosis patients 对健康人和多发性硬化症患者肠脑轴相关细菌中发现的 GABAT 蛋白进行分子鉴定
IF 4.4 2区 生物学
Saudi Journal of Biological Sciences Pub Date : 2024-02-02 DOI: 10.1016/j.sjbs.2024.103939
Nadia Hussain , Fatima Muccee
{"title":"In-silico characterization of GABAT protein found in gut-brain axis associated bacteria of healthy individuals and multiple sclerosis patients","authors":"Nadia Hussain ,&nbsp;Fatima Muccee","doi":"10.1016/j.sjbs.2024.103939","DOIUrl":"10.1016/j.sjbs.2024.103939","url":null,"abstract":"<div><h3>Background</h3><p>Multiple sclerosis (MS) is a neurodegenerative disease characterized by inflammation and demyelination of neurons. There is evidence to suggest that level of a neurotransmitter gamma-aminobutyric acid (GABA), due to the degradation by γ-aminobutyric acid transaminase (GABAT), is reduced in certain areas of the brain in MS patients. MS is always accompanied by gut bacteria dysbiosis. In healthy individuals, <em>Faecalibacterium</em> sp. while in MS patients <em>A. calcoaceticus, Clostridium</em> sp. and <em>S. typhimurium</em> are found abundantly. Although all these microbes produce GABAT but only in MS patients this enzyme significantly degrades GABA.</p></div><div><h3>Objective</h3><p>Present study is an attempt to characterize the GABAT protein sequences of these bacteria.</p></div><div><h3>Methodology</h3><p>Sequences of GABAT protein were retrieved from Uniprot database. Sequences were analyzed by Protparam, Gneg-mPLoc, SOSUI, PFP-FunDSeqE, Pepwheel program, PROTEUS and Alphafold and SAVES servers, MEME suite and HDOCK server.</p></div><div><h3>Results</h3><p>In healthy individuals gastrointestinal tract (GIT) bacteria, GABAT protein was present in inner-membrane with α helix content (61 and 62%) and β sheet content (5%), 4-helical cytokines functional domains. It has greater number of B-cell epitopes and more complex 3D configuration as compared to MS patients GIT bacterial enzymes.</p></div><div><h3>Conclusion</h3><p>Present study might enable us to modify the GABAT encoding gene and enzyme through site-directed mutagenesis in pathogenic bacteria thus reducing their potential of causing MS.</p></div>","PeriodicalId":21540,"journal":{"name":"Saudi Journal of Biological Sciences","volume":"31 4","pages":"Article 103939"},"PeriodicalIF":4.4,"publicationDate":"2024-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1319562X24000172/pdfft?md5=61295ff536ef0816bfc5cd27efbbb888&pid=1-s2.0-S1319562X24000172-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139662007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Diversity of endophytic fungi from medicinal plant Oxalis latifolia and their antimicrobial potential against selected human pathogens 药用植物牛樟芝内生真菌的多样性及其对某些人类病原体的抗菌潜力
IF 4.4 2区 生物学
Saudi Journal of Biological Sciences Pub Date : 2024-02-01 DOI: 10.1016/j.sjbs.2024.103958
J. Hussein, H. Myovela, D. Tibuhwa
{"title":"Diversity of endophytic fungi from medicinal plant Oxalis latifolia and their antimicrobial potential against selected human pathogens","authors":"J. Hussein, H. Myovela, D. Tibuhwa","doi":"10.1016/j.sjbs.2024.103958","DOIUrl":"https://doi.org/10.1016/j.sjbs.2024.103958","url":null,"abstract":"","PeriodicalId":21540,"journal":{"name":"Saudi Journal of Biological Sciences","volume":"6 9","pages":""},"PeriodicalIF":4.4,"publicationDate":"2024-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139823236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Pandemic H1N1 influenza virus triggers a strong T helper cell response in human nasopharynx-associated lymphoid tissues 甲型 H1N1 流感病毒在人类鼻咽相关淋巴组织中引发强烈的 T 辅助细胞反应
IF 4.4 2区 生物学
Saudi Journal of Biological Sciences Pub Date : 2024-01-28 DOI: 10.1016/j.sjbs.2024.103941
Waleed H. Mahallawi , Omar F. Khabour
{"title":"Pandemic H1N1 influenza virus triggers a strong T helper cell response in human nasopharynx-associated lymphoid tissues","authors":"Waleed H. Mahallawi ,&nbsp;Omar F. Khabour","doi":"10.1016/j.sjbs.2024.103941","DOIUrl":"10.1016/j.sjbs.2024.103941","url":null,"abstract":"<div><p>The pH1N1 belongs to influenza A family that is sometimes transmitted to humans via contact with pigs. Human tonsillar immune cells are widely used as <em>in vitro</em> models to study responses to influenza viruses. In the current study, human memory (M) and naïve (N) T cells responses in mononuclear cells of tonsil (TMCs) and peripheral blood (PBMCs) were stimulated by pH1N1/sH1N1, and then stained for estimation of T cells proliferation index. Individuals with an anti-pH1N1 hemagglutination (HA) inhibition (HAI) titer of forty or greater exhibited stronger HA-specific M-CD4<sup>+</sup> T cells responses to pH1N1 in TMCs/PBMCs than those with an HAI titer of less than forty (P &lt; 0.01). In addition, a positive correlation was observed between proliferation indices of M-CD4<sup>+</sup> T cells induced by exposure to sH1N1/pH1N1 (p &lt; 0.01). Moreover, a strong correlation (p &lt; 0.001) was detected between subjects’ age and their HA-specific M-CD4<sup>+</sup> T cells induced by pH1N1 exposure, indicating that this response was age-dependent. Finally, stimulation of TMCs with pH1N1-HA resulted in a significant M−CD8<sup>+</sup> T cells response (p &lt; 0.05). In conclusion, pH1N1 HA elicits a strong M-CD4<sup>+</sup> T cells response in TMCs. Additionally, this response correlates with the response to sH1N1 suggesting cross-reactivity in T cells epitopes directed against HAs of both viral strains.</p></div>","PeriodicalId":21540,"journal":{"name":"Saudi Journal of Biological Sciences","volume":"31 3","pages":"Article 103941"},"PeriodicalIF":4.4,"publicationDate":"2024-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1319562X24000196/pdfft?md5=88fb50c1752b8f7ecb9fa5dcedce7397&pid=1-s2.0-S1319562X24000196-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139588297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Inter - and intraspecific phenotypic variation in co-occurring invasive and introduced cyprinid fish species 入侵和引进鲤科鱼类物种的种间和种内表型变异
IF 4.4 2区 生物学
Saudi Journal of Biological Sciences Pub Date : 2024-01-28 DOI: 10.1016/j.sjbs.2024.103943
Can Mert Gören, Nehir Kaymak
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