Molecular Biotechnology最新文献

筛选
英文 中文
Exploring Niclosamide as a Multi-target Drug Against SARS-CoV-2: Molecular Dynamics Simulation Studies on Host and Viral Proteins. 探索尼可刹米作为抗 SARS-CoV-2 的多靶点药物:宿主和病毒蛋白质的分子动力学模拟研究。
IF 2.4 4区 生物学
Molecular Biotechnology Pub Date : 2024-10-07 DOI: 10.1007/s12033-024-01296-2
Prachi Jagtap, Virendra Kumar Meena, Susmit Sambhare, Atanu Basu, Priya Abraham, Sarah Cherian
{"title":"Exploring Niclosamide as a Multi-target Drug Against SARS-CoV-2: Molecular Dynamics Simulation Studies on Host and Viral Proteins.","authors":"Prachi Jagtap, Virendra Kumar Meena, Susmit Sambhare, Atanu Basu, Priya Abraham, Sarah Cherian","doi":"10.1007/s12033-024-01296-2","DOIUrl":"https://doi.org/10.1007/s12033-024-01296-2","url":null,"abstract":"<p><p>Niclosamide has emerged as a promising repurposed drug against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). In vitro studies suggested that niclosamide inhibits the host transmembrane protein 16F (hTMEM16F), crucial for lipid scramblase activity, which consequently reduces syncytia formation that aids viral spread. Based on other in vitro reports, niclosamide may also target viral proteases such as papain-like protease (PLpro) and main protease (Mpro), essential for viral replication and maturation. However, the precise interactions by which niclosamide interacts with these multiple targets remain largely unclear. Docking and molecular dynamics (MD) simulation studies were undertaken based on a homology model of the hTMEM16F and available crystal structures of SARS-CoV-2 PLpro and Mpro. Niclosamide was observed to bind stably throughout a 400 ns MD simulation at the extracellular exit gate of the hTMEM16F tunnel, forming crucial interactions with residues spanning the TM1-TM2 loop (Gln350), TM3 (Phe481), and TM5-TM6 loop (Lys573, Glu594, and Asp596). Among the SARS-CoV-2 proteases, niclosamide was found to interact effectively with conserved active site residues of PLpro (Tyr268), exhibiting better stability in comparison to the control inhibitor, GRL0617. In conclusion, our in silico analyses support niclosamide as a multi-targeted drug inhibiting viral and host proteins involved in SARS-CoV-2 infections.</p>","PeriodicalId":18865,"journal":{"name":"Molecular Biotechnology","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142381286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Identification of Cutinolytic Esterase from Microplastic-Associated Microbiota Using Functional Metagenomics and Its Plastic Degrading Potential. 利用功能宏基因组学从微塑料相关微生物群中鉴定角质分解酯酶及其塑料降解潜力。
IF 2.4 4区 生物学
Molecular Biotechnology Pub Date : 2024-10-01 Epub Date: 2023-10-10 DOI: 10.1007/s12033-023-00916-7
Ali Osman Adıgüzel, Fatma Şen, Serpil Könen-Adıgüzel, Ahmet Erkan Kıdeyş, Arzu Karahan, Tuğrul Doruk, Münir Tunçer
{"title":"Identification of Cutinolytic Esterase from Microplastic-Associated Microbiota Using Functional Metagenomics and Its Plastic Degrading Potential.","authors":"Ali Osman Adıgüzel, Fatma Şen, Serpil Könen-Adıgüzel, Ahmet Erkan Kıdeyş, Arzu Karahan, Tuğrul Doruk, Münir Tunçer","doi":"10.1007/s12033-023-00916-7","DOIUrl":"10.1007/s12033-023-00916-7","url":null,"abstract":"<p><p>Plastic pollution has threatened biodiversity and human health by shrinking habitats, reducing food quality, and limiting the activities of organisms. Therefore, global interest in discovering novel enzymes capable of degrading plastics has increased considerably. Within this context, the functional metagenomic approach, which allows for unlocking the functional potential of uncultivable microbial biodiversity, was used to discover a plastic-degrading enzyme. First, metagenomic libraries derived from microplastic-associated microbiota were screened for esterases capable of degrading both tributyrin and polycaprolactone. Clone KAD01 produced esterase highly active against p-nitrophenyl esters (C2-C16). The gene corresponding to the enzyme activity showed moderate identity (≤ 55.94%) to any known esterases/cutinases. The gene was extracellularly expressed with a 6× histidine tag in E. coli BL21(DE3), extracellularly. Titer of the enzyme (CEstKAD01) was raised from 21.32 to 35.17 U/mL by the statistical optimization of expression conditions and media components. CEstKAD01 was most active at pH 7.0 and 30 °C. It was noteworthy stable over a wide pH (6.0-10.0) and temperature (20-50 °C). The enzyme was active and stable in elevated NaCl concentrations up to 12% (w/v). Pre-incubation of CEstKAD01 with Mg<sup>2+</sup>, Mn<sup>2+</sup>, and Ca<sup>2+</sup> increased the enzyme activity. CEstKAD01 displayed an excellent tolerance against various chemicals and solvents. It was determined that 1 mg of the enzyme caused the release of 5.39 ± 0.18 mM fatty acids from 1 g apple cutin in 120 min. K<sub>m</sub> and V<sub>max</sub> values of CEstKAD01 against p-nitrophenyl butyrate were calculated to be 1.48 mM and 20.37 µmol/min, respectively. The enzyme caused 6.94 ± 0.55, 8.71 ± 0.56, 7.47 ± 0.47, and 9.22 ± 0.18% of weight loss in polystyrene, high-density polyethylene, low-density polyethylene, and polyvinyl chloride after 30-day incubation. The scanning electron microscopy (SEM) analysis indicated the formation of holes and pits on the plastic surfaces supporting the degradation. In addition, the change in chemical structure in plastics treated with the enzyme was determined by Fourier Transform Infrared Spectroscopy (FTIR) analysis. Finally, the degradation products were found to have no genotoxic potential. To our knowledge, no cutinolytic esterase with the potential to degrade polystyrene (PS), high-density polyethylene (HDPE), low-density polyethylene (LDPE), and polyvinyl chloride (PVC) has been identified from metagenomes derived from microplastic-associated microbiota.</p>","PeriodicalId":18865,"journal":{"name":"Molecular Biotechnology","volume":" ","pages":"2995-3012"},"PeriodicalIF":2.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41183027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Effect of Mild Therapeutic Hypothermia Combined with Stereotactic Aspiration on Patients with Severe Cerebral Hemorrhage. 亚低温联合立体定向吸入治疗重型脑出血的疗效观察。
IF 2.4 4区 生物学
Molecular Biotechnology Pub Date : 2024-10-01 Epub Date: 2023-10-16 DOI: 10.1007/s12033-023-00882-0
Qin Song, Yingying Liang, Yan Zhang, Yonglei Zhang, Yuanxin Wang, Zijuan Chang
{"title":"Effect of Mild Therapeutic Hypothermia Combined with Stereotactic Aspiration on Patients with Severe Cerebral Hemorrhage.","authors":"Qin Song, Yingying Liang, Yan Zhang, Yonglei Zhang, Yuanxin Wang, Zijuan Chang","doi":"10.1007/s12033-023-00882-0","DOIUrl":"10.1007/s12033-023-00882-0","url":null,"abstract":"<p><p>This study aimed to investigate the effects of mild therapeutic hypothermia combined with stereotactic aspiration of spontaneous intracerebral hematoma on neurological function, inflammatory markers, cerebral hematoma, and cerebral edema in patients with severe cerebral hemorrhage. The clinical data of 86 patients with severe cerebral hemorrhage treated at our hospital between March 2020 and January 2022 were retrospectively analyzed. The patients were grouped according to their treatment plans: the control group consisted of 40 patients who underwent stereotactic aspiration of the spontaneous intracerebral hematoma, whereas the study group consisted of 46 patients who received adjuvant mild therapeutic hypothermia in addition to the aforementioned treatment. Clinical efficacy, neurological function (NIHSS score), daily living ability (BI score), cerebral hematoma, cerebral edema, cerebral hemodynamics (PI, RI, Vm, Vd), inflammatory markers (IL-6, IL-8, TNF-α, hs-CRP), oxidative stress indicators (SOD, MDA, 8-iso-PGF2α), serum-related factors (MMP-9, ICAM-1, ET-1, NO), and prognosis were compared between the groups. The total efficacy rate in the study group (95.65%) was significantly higher than that in the control group (77.50%) (P < 0.05). Post-treatment NIHSS scores, intracranial hematoma volume, perihematoma edema volume, cerebral edema volume, RI, serum IL-6, IL-8, TNF-α, hs-CRP, MDA, and 8-iso-PGF2α levels were significantly lower in both groups, with the study group showing even greater reductions. The BI score and PI, Vm, Vd, SOD, and NO levels were significantly higher in the study group (P < 0.05). At the 6-month follow-up, the prognosis of patients in the intervention group was significantly better than that of patients in the control group (P < 0.05). The combination of mild therapeutic hypothermia with stereotactic aspiration of a spontaneous intracerebral hematoma has demonstrated efficacy in the treatment of severe cerebral hemorrhage. This approach effectively reduces cerebral hematoma and edema, improves daily living ability, alleviates neurological deficits, regulates cerebral hemodynamics, suppresses inflammatory responses and oxidative stress, modulates serum-related factor levels, and enhances patient prognosis.</p>","PeriodicalId":18865,"journal":{"name":"Molecular Biotechnology","volume":" ","pages":"2804-2815"},"PeriodicalIF":2.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41236906","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
ITGB4 Serves as an Identification and Prognosis Marker Associated with Immune Infiltration in Small Cell Lung Carcinoma. ITGB4作为小细胞肺癌免疫浸润相关的鉴定和预后标志物。
IF 2.4 4区 生物学
Molecular Biotechnology Pub Date : 2024-10-01 Epub Date: 2023-10-17 DOI: 10.1007/s12033-023-00912-x
Guo-Sheng Li, Zhi-Guang Huang, Rong-Quan He, Wei Zhang, Yu-Xing Tang, Zhi-Su Liu, Xiang-Yu Gan, Deng Tang, Dong-Ming Li, Yu-Lu Tang, Yan-Ting Zhan, Yi-Wu Dang, Hua-Fu Zhou, Jin-Hua Zheng, Mei-Hua Jin, Jia Tian, Gang Chen
{"title":"ITGB4 Serves as an Identification and Prognosis Marker Associated with Immune Infiltration in Small Cell Lung Carcinoma.","authors":"Guo-Sheng Li, Zhi-Guang Huang, Rong-Quan He, Wei Zhang, Yu-Xing Tang, Zhi-Su Liu, Xiang-Yu Gan, Deng Tang, Dong-Ming Li, Yu-Lu Tang, Yan-Ting Zhan, Yi-Wu Dang, Hua-Fu Zhou, Jin-Hua Zheng, Mei-Hua Jin, Jia Tian, Gang Chen","doi":"10.1007/s12033-023-00912-x","DOIUrl":"10.1007/s12033-023-00912-x","url":null,"abstract":"<p><p>Integrin beta 4 (ITGB4) is a vital factor for numerous cancers. However, no reports regarding ITGB4 in small cell lung carcinoma (SCLC) have been found in the existing literature. This study systematically investigated the expression and clinical value of ITGB4 in SCLC using multi-center and large-sample (n = 963) data. The ITGB4 expression levels between SCLC and control tissues were compared using standardized mean difference and Wilcoxon rank-sum test. The clinical significance of the gene in SCLC was observed using Cox regression and Kaplan-Meier curves. ITGB4 is overexpressed in multiple cancers and represents significant value in distinguishing among cancer samples (AUC = 0.91) and predicting the prognoses (p < 0.05) of patients with different cancers. In contrast, decreased ITGB4 mRNA expression was determined in SCLC (SMD < 0), and this finding was further confirmed at protein levels using in-house specimens (p < 0.05). This decrease in expression may be attributed to the regulatory role of estrogen receptor 1. ITGB4 may participate in the progression of SCLC by affecting several signaling pathways (e.g., tumor necrosis factor signaling pathway) and a series of immune cells (e.g., dendritic cells) (p < 0.05). The gene may serve as a potential marker for predicting the disease status (AUC = 0.97) and prognoses (p < 0.05) of patients with SCLC. Collectively, ITGB4 was identified as an identification and prognosis marker associated with immune infiltration in SCLC.</p>","PeriodicalId":18865,"journal":{"name":"Molecular Biotechnology","volume":" ","pages":"2956-2971"},"PeriodicalIF":2.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41236908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Generation of Zebrafish Models of Human Retinitis Pigmentosa Diseases Using CRISPR/Cas9-Mediated Gene Editing System. 利用CRISPR/ cas9介导的基因编辑系统生成人类视网膜色素变性疾病斑马鱼模型
IF 2.4 4区 生物学
Molecular Biotechnology Pub Date : 2024-10-01 Epub Date: 2023-11-19 DOI: 10.1007/s12033-023-00907-8
Farzaneh Mirzaei, Atiyeh Eslahi, Sareh Karimi, Farzaneh Alizadeh, Arash Salmaninejad, Mohammad Rezaei, Sina Mozaffari, Tayebeh Hamzehloei, Alireza Pasdar, Majid Mojarrad
{"title":"Generation of Zebrafish Models of Human Retinitis Pigmentosa Diseases Using CRISPR/Cas9-Mediated Gene Editing System.","authors":"Farzaneh Mirzaei, Atiyeh Eslahi, Sareh Karimi, Farzaneh Alizadeh, Arash Salmaninejad, Mohammad Rezaei, Sina Mozaffari, Tayebeh Hamzehloei, Alireza Pasdar, Majid Mojarrad","doi":"10.1007/s12033-023-00907-8","DOIUrl":"10.1007/s12033-023-00907-8","url":null,"abstract":"<p><p>Generating animal models can explore the role of new candidate genes in causing diseases and the pathogenicity of a specific mutation in the underlying genes. These animals can be used to identify new pharmaceutical or genetic therapeutic methods. In the present experiment, we developed a rpe65a knock out (KO) zebrafish as a retinitis pigmentosa (RP) disease model. Using the CRISPR/Cas9 system, the rpe65a gene was KO in zebrafish. Two specific single-guide RNAs (sgRNAs) were designed for the zebrafish rpe65a gene. SgRNAs were cloned into the DR274 plasmid and synthesized using in vitro transcription method. The efficiency of Ribonucleoprotein (synthesized sgRNA and recombinant Cas9) was evaluated by in vitro digestion experiment. Ribonucleoprotein complexes were microinjected into one to four-celled eggs of the TU zebrafish strain. The effectiveness of sgRNAs in KO the target gene was determined using the Heteroduplex mobility assay (HMA) and Sanger sequencing. Online software was used to determine the percent of mosaicism in the sequenced samples. By examining the sequences of the larvae that showed a mobility shift in the HMA method, the presence of indels in the binding region of sgRNAs was confirmed, so the zebrafish model for RP disease established. Zebrafish is an ideal animal model for the functional study of various diseases involving different genes and mutations and used for evaluating different therapeutic approaches in human diseases. This study presents the production of rpe65a gene KO zebrafish models using CRISPR/Cas9 technology. This model can be used in RP pathophysiology studies and preclinical gene therapy experiments.</p>","PeriodicalId":18865,"journal":{"name":"Molecular Biotechnology","volume":" ","pages":"2909-2919"},"PeriodicalIF":2.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138047377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Glycoprofile Comparison of the SARS-CoV-2 Spike Proteins Expressed in CHO and HEK Cell Lines. 在 CHO 和 HEK 细胞系中表达的 SARS-CoV-2 穗状蛋白质的糖谱比较。
IF 2.4 4区 生物学
Molecular Biotechnology Pub Date : 2024-10-01 DOI: 10.1007/s12033-024-01288-2
Helen L Wright, Caroline Evans, Philip J Jackson, David C James, Kang Lan Tee, Tuck Seng Wong, Mark J Dickman, Jagroop Pandhal
{"title":"Glycoprofile Comparison of the SARS-CoV-2 Spike Proteins Expressed in CHO and HEK Cell Lines.","authors":"Helen L Wright, Caroline Evans, Philip J Jackson, David C James, Kang Lan Tee, Tuck Seng Wong, Mark J Dickman, Jagroop Pandhal","doi":"10.1007/s12033-024-01288-2","DOIUrl":"https://doi.org/10.1007/s12033-024-01288-2","url":null,"abstract":"<p><p>Coronavirus SARS-CoV-2 spike protein remains a key focus of research due to a continued need for diagnostic and therapeutic tools to monitor and respond to new variants. Glycosylation of the spike protein is critical for the protein's functions in viral attachment and host cell entry. For scalable and cost-effective production of the spike protein, expression system-driven divergence in glycosylation patterns on recombinant spike proteins needs to be fully understood. This study assessed the N-glycosylation profiles of a full-length trimeric spike protein expressed in either Human Embryonic Kidney (HEK Expi293F) or Chinese Hamster Ovary (CHO-S) cells. Glycopeptide analysis was performed using a tandem mass spectrometry workflow and BioPharma <math> <msup><mrow><mtext>Finder</mtext></mrow> <mtext>TM</mtext></msup> </math> incorporating HEK and CHO glycan databases for protein characterisation. The results outline important differences in the variety and types of N-glycan generated by the two cell lines across the 22 known N-glycosylation sites of the spike protein. A notable increase in terminal sialylation, as well as the presence of the potentially immunogenic N-glycolylneuraminic acid at a functionally key N-glycosylation site, was observed in the CHO-S derived spike protein. With the potential for the relatively vast and more complex CHO glycan repertoire (182 glycans relative to 39 human glycans) to produce functional implications with CHO-S expressed spike protein, this study adds valuable knowledge to aid Quality by Design approaches and enable Multi Attribute Monitoring of specific N-glycosylation sites for proteoform analyses. This can further inform antigen development with future variants in order to devise updated diagnostic tests and therapeutic vaccine designs.</p>","PeriodicalId":18865,"journal":{"name":"Molecular Biotechnology","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142350373","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
PTPRC Inhibits Ferroptosis of Osteosarcoma Cells via Blocking TFEB/FTH1 Signaling. PTPRC通过阻断TFEB/FTH1信号传导抑制骨肉瘤细胞的铁下垂。
IF 2.4 4区 生物学
Molecular Biotechnology Pub Date : 2024-10-01 Epub Date: 2023-10-18 DOI: 10.1007/s12033-023-00914-9
Yan Shao, Xiao Zuo
{"title":"PTPRC Inhibits Ferroptosis of Osteosarcoma Cells via Blocking TFEB/FTH1 Signaling.","authors":"Yan Shao, Xiao Zuo","doi":"10.1007/s12033-023-00914-9","DOIUrl":"10.1007/s12033-023-00914-9","url":null,"abstract":"<p><p>Protein tyrosine phosphatase receptor type C (PTPRC) is reported to function as an oncogenic role in various cancer. However, the studies on the roles of PTPRC in osteosarcoma (OS) are limited. This study aimed to explore the potentials of PTPRC in OS. mRNA levels were detected by reverse transcription-quantitative polymerase chain reaction (RT-qPCR). Protein expression was detected by western blot. Lysosome biogenesis was determined using immunofluorescence. The binding sites of transcription factor EB (TFEB) on the promoter of ferritin heavy chain 1 (FTH1) were predicted by the online dataset JASPAR and confirmed by luciferase and chromatin immunoprecipitation (ChIP) assays. Cell death was determined using propidium iodide (PI) and TdT-mediated dUTP nick-end labeling (TUNEL) staining. The results showed that PTPRC was significantly overexpressed in OS tissues and cells. PTPRC knockdown promoted the phosphorylation and nuclear translocation of TFEB. Moreover, PTPRC knockdown markedly promoted lysosome biogenesis and the accumulation of ferrous ion (Fe<sup>2+</sup>), whereas decreased the release of glutathione (GSH). Besides, PTPRC knockdown significantly promoted autophagy and downregulated mRNA expression of FTH1 and ferritin light chain (FTL). Additionally, TFEB transcriptionally inactivated FTH1. PTPRC knockdown significantly promoted the ferroptosis of OS cells, which was markedly alleviated by TFEB shRNA. Taken together, PTPRC knockdown-mediated TFEB phosphorylation and translocation dramatically promoted lysosome biogenesis, ferritinophagy, as well as the ferroptosis of OS cells via regulating FTH1/FTL signaling. Therefore, PTPRC/TFEB/FTH1 signaling may be a potential target for OS.</p>","PeriodicalId":18865,"journal":{"name":"Molecular Biotechnology","volume":" ","pages":"2985-2994"},"PeriodicalIF":2.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41236909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Lag Plot: A Novel Method to Determine Viable Bacterial Cell Number via a Single OD Measurement. 滞后图:通过单次 OD 测量确定存活细菌细胞数的新方法。
IF 2.4 4区 生物学
Molecular Biotechnology Pub Date : 2024-10-01 DOI: 10.1007/s12033-024-01295-3
Alireza Ebrahiminezhad, Abdolreza Karami, Zeinab Karimi, Mohammad Kargar, Ahmad Vaez, Aydin Berenjian
{"title":"Lag Plot: A Novel Method to Determine Viable Bacterial Cell Number via a Single OD Measurement.","authors":"Alireza Ebrahiminezhad, Abdolreza Karami, Zeinab Karimi, Mohammad Kargar, Ahmad Vaez, Aydin Berenjian","doi":"10.1007/s12033-024-01295-3","DOIUrl":"https://doi.org/10.1007/s12033-024-01295-3","url":null,"abstract":"<p><p>Bactericidal activity is a valuable parameter which is considered and measured for antimicrobial compounds. The available standard protocol to evaluate bactericidal activity is based on the direct colony count. Colony counting requires serial dilution, plating, overnight incubation, and direct counting, which is time-and labor-intensive. In regard to eliminate direct plate count, novel techniques were developed based on the real-time growth monitoring which can come with some limitations and drawbacks. These drawbacks encourage us to develop a novel technique with simple procedure to determine viable bacterial cell count. In this procedure, real-time growth monitoring is not required. In fact, after an incubation time, the number of viable bacteria can be determined with a single OD measurement and through an equation. In this regard, four standard bacterial strains, including Staphylococcus aureus (ATCC 25923), Escherichia coli (ATCC 25922), Pseudomonas aeruginosa (ATCC 27853), and Bacillus subtilis (ATCC 23857), were cultured with descending inoculum densities (1.5 × 10<sup>7</sup> to 15 CFU/mL) and growth curves were drawn. As expected, growth in the samples with lower inoculum densities recorded with longer lag phase. Also, a direct relation was observed between the recorded turbidities and initial cell counts. A logarithmic curve (lag plot) was obtained by plotting the OD, after 12-18 h incubation, against initial cell counts. In all examined strains, R<sup>2</sup> was calculated in the range of 0.96-0.99 which is acceptable value for coefficient of determination. Equation corresponding to the lag plot was obtained and called lag equation. This equation is applicable to calculate the number of viable cells in unknown samples simply by inoculation, incubation, and single OD measurement. Developed technique can be introduced as a simple substitution for labor- and time-intensive direct colony counting.</p>","PeriodicalId":18865,"journal":{"name":"Molecular Biotechnology","volume":" ","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142365848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Glycolysis-Metabolism-Related Prognostic Signature for Ewing Sarcoma Patients. 尤因肉瘤患者糖酵解代谢相关预后特征。
IF 2.4 4区 生物学
Molecular Biotechnology Pub Date : 2024-10-01 Epub Date: 2023-09-29 DOI: 10.1007/s12033-023-00899-5
Fusen Jia, Lei Liu, Qi Weng, Haiyang Zhang, Xuesheng Zhao
{"title":"Glycolysis-Metabolism-Related Prognostic Signature for Ewing Sarcoma Patients.","authors":"Fusen Jia, Lei Liu, Qi Weng, Haiyang Zhang, Xuesheng Zhao","doi":"10.1007/s12033-023-00899-5","DOIUrl":"10.1007/s12033-023-00899-5","url":null,"abstract":"<p><p>Ewing sarcoma (EwS) is a malignant sarcoma which occurs in bone and soft tissues commonly happening in children with poor survival rates. Changes in cell metabolism, such as glycolysis, may provide the environment for the transformation and progression of tumors. We aimed to build a model to predict prognosis of EwS patients based on glycolysis and metabolism genes. Candidate genes were obtained by differential gene expression analysis based on GSE17679, GSE17674 and ICGC datasets. We performed GO and KEGG pathway enrichment analysis on candidate genes. Univariate Cox and LASSO Cox regression analyses were conducted to construct a model to calculate the Risk Score. GSEA was done between high-risk and low-risk groups. CIBERSORT was applied to analyze the immune landscape. We got 295 candidate glycolysis-metabolism-related genes which were enriched in 620 GO terms and 18 KEGG pathways. 12 Genes were selected by univariate Cox model and 5 of them were determined by LASSO Cox regression analysis to be used in the construction of the Risk Score model. The Risk Score could be considered as an independent prognosis factor. The immune landscape and immune checkpoints' expression significantly differed between high- and low-risk groups. Our research constructed a new glycolysis-metabolism-related genes (FABP5, EMILIN1, GLCE, PHF11 and PALM3) based prognostic signature for EwS patients and assisted in gaining insight into prognosis to improve therapies further.</p>","PeriodicalId":18865,"journal":{"name":"Molecular Biotechnology","volume":" ","pages":"2882-2896"},"PeriodicalIF":2.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41133985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Bioinformatics Analysis of miR-181a and Its Role in Adipogenesis, Obesity, and Lipid Metabolism Through Review of Literature. miR-181a的生物信息学分析及其在脂肪生成、肥胖和脂质代谢中的作用。
IF 2.4 4区 生物学
Molecular Biotechnology Pub Date : 2024-10-01 Epub Date: 2023-09-29 DOI: 10.1007/s12033-023-00894-w
Guo Hongfang, Rajwali Khan, Ahmed A El-Mansi
{"title":"Bioinformatics Analysis of miR-181a and Its Role in Adipogenesis, Obesity, and Lipid Metabolism Through Review of Literature.","authors":"Guo Hongfang, Rajwali Khan, Ahmed A El-Mansi","doi":"10.1007/s12033-023-00894-w","DOIUrl":"10.1007/s12033-023-00894-w","url":null,"abstract":"<p><p>The miRNAs regulate various biological processes in the mammalian body system. The role of miR-181a in the development, progression, and expansion of cancers is well-documented. However, the role of miR-181a in adipogenesis; lipid metabolism; obesity; and obesity-related issues such as diabetes mellitus needs to be explored. Therefore, in the present study, the literature was searched and bioinformatics tools were applied to explore the role of miR-181a in adipogenesis. The list of adipogenic and lipogenic target genes validated through different publications were extracted and compiled. The network and functional analysis of these target genes was performed through in-silico analysis. The mature sequence of miR-181a of different species were extracted from and were found highly conserved among the curated species. Additionally, we also used various bioinformatics tools such as target gene extraction from Targetscan, miRWalk, and miRDB, and the list of the target genes from these different databases was compared, and common target genes were predicted. These common target genes were further subjected to the enrichment score and KEGG pathways analysis. The enrichment score of the vital KEGG pathways of the target genes is the key regulator of adipogenesis, lipogenesis, obesity, and obesity-related syndromes in adipose tissues. Therefore, the information presented in the current review will explore the regulatory roles of miR-181a in fat tissues and its associated functions and manifestations.</p>","PeriodicalId":18865,"journal":{"name":"Molecular Biotechnology","volume":" ","pages":"2710-2724"},"PeriodicalIF":2.4,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41139127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信