美国分子生物学期刊(英文)Pub Date : 2021-03-26DOI: 10.4236/AJMB.2021.112004
A. Zhang, Zhiming Zhou
{"title":"Characteristics of a Critical Calcium Transportation Regulator: Plasma Membrane Ca2+-ATPase Involved in Calcium Homeostasis from Hyriopsis cumingii (Lea)","authors":"A. Zhang, Zhiming Zhou","doi":"10.4236/AJMB.2021.112004","DOIUrl":"https://doi.org/10.4236/AJMB.2021.112004","url":null,"abstract":"Plasma Membrane Calcium ATPase (PMCA) plays a critical role in transporting Ca2+ out of the cytosol across the plasma membrane. Here, a full-length cDNA sequence of plasma membrane Ca2+-ATPase gene was isolated from the gill of Hyriopsis cumingii (HcPMCA) by using SMART RACE technique. The entire cDNA was 5230 bp, including a 417-bp 5'-UTR, a 3588-bp ORF and a 1225-bp 3'-UTR, encoding a 1195-amino acid protein, and no putative signal peptide was predicted. Compared with PMCA homologs from seawater mollusks, HcPMCA had high similarity with them in both sequence and structure. Tissue-specific expression analysis revealed that HcPMCA mRNA was detected in all the sampled tissues, but was prominently expressed in the gill and mantle. When exposed to a serie of increasing Ca2+ that lasted for 7 days, the mRNA expression of HcPMCA in the mantle was slightly downregulated, but peaked at 60 mg/L. Moreover, the temporal expression of HcPMCA transcripts in the mantle after 60 mg/L Ca2+ exposure was shown to be bell-shaped, which was slightly downregulated at 24 h, but upregulated from 24 h to 48 h post-treatment, peaking at 48 h. The result of present study provides useful information for further studies on function and regulation mechanism of HcPMCA gene.","PeriodicalId":65391,"journal":{"name":"美国分子生物学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46197151","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
美国分子生物学期刊(英文)Pub Date : 2021-03-04DOI: 10.4236/AJMB.2021.112003
Yoshihito Hosaka, S. Matsutani, Shinya Kawate, K. Itoh, A. Miura, Yukaze Mizoura, Sayumi Yamada, S. Uemura, H. Konno, Ewa Grave, H. Wakui, H. Itoh
{"title":"Expression of Difficult-to-Express Proteins, Human IL-12 and IFN-γ","authors":"Yoshihito Hosaka, S. Matsutani, Shinya Kawate, K. Itoh, A. Miura, Yukaze Mizoura, Sayumi Yamada, S. Uemura, H. Konno, Ewa Grave, H. Wakui, H. Itoh","doi":"10.4236/AJMB.2021.112003","DOIUrl":"https://doi.org/10.4236/AJMB.2021.112003","url":null,"abstract":"It is known to be that lactic acid bacteria induce the IL-12. IL-12 activates NK cells and promotes the production of IFN-γ. IFN-γ activates macrophages, resulting in enhanced phagocytosis and bactericidal activity. We have been investigating fermented foods that activate the immune function. For that purpose, a specific antibody is required. We tried to express IL-12p35 by the usual method, but IL-12p35 was not expressed at all. In the present study, we constructed, purified human IL-12p35 and obtained a specific antibody against IL-12p35. We also purified human IFN-γ and obtained specific antibody against IFN-γ. We have established a method for expressing poorly expressed proteins. The method we have established can be applied to the purification of poorly expressed proteins and antibody production.","PeriodicalId":65391,"journal":{"name":"美国分子生物学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45015565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
美国分子生物学期刊(英文)Pub Date : 2021-03-04DOI: 10.4236/AJMB.2021.112005
S. Nawar, M. Rashid, A. Ahmed, Mahboob Hossain
{"title":"A Study of Prevalence and Pathogenic Activity of Bacteria in the Air of Dhaka City and Their Antimicrobial Resistance Pattern","authors":"S. Nawar, M. Rashid, A. Ahmed, Mahboob Hossain","doi":"10.4236/AJMB.2021.112005","DOIUrl":"https://doi.org/10.4236/AJMB.2021.112005","url":null,"abstract":"Bangladesh composes the most polluted air with Dhaka securing the top position. The purpose of the study is the enumeration of the prevalence of pathogenic bacteria in Dhaka city’s air and their antibiotic susceptibility to the common antibiotics. For the sample collection, different selective media was exposed in air where the highest and lowest CFU was 137 and 1 respectively. Pathogens were screened through Hemolysis, DNase and Coagulase test and identified by 16s rRNA sequencing followed by antibiotic susceptibility test. 16s rRNA sequencing revealed that the organisms were Bacillus altitudinis strain 41KF2bT.28, Bacillus licheniformis strain QMA46-2, Bacillus altitudinis, Bacillus pumilis strain BJ-DEBCR-34, Staphylococcus aureus strain TPS3156, Bacillus sp CO16, Pseudomonas sp strain 96LC22 and Shigella dysenteriae strain ATCC 13313. Shigella dysenteriae, Staphylococcus aureus were 81.81% and 54.54% resistant to the antibiotics. Whole-genome sequencing would help to observe mutations in the traits as changes in hemolytic activity were found during pathogenecity tests.","PeriodicalId":65391,"journal":{"name":"美国分子生物学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46708669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
美国分子生物学期刊(英文)Pub Date : 2021-01-01DOI: 10.4236/ajmb.2021.114013
Ioannis Krasias
{"title":"The Anti-Sickling Properties of Medicinal Plants, Insights in Botanical Medicine*","authors":"Ioannis Krasias","doi":"10.4236/ajmb.2021.114013","DOIUrl":"https://doi.org/10.4236/ajmb.2021.114013","url":null,"abstract":"SCD is one of the most prevailing homogeneous inherited haemoglobinopathies causing a plethora of various clinical complications to the patients. The high mortality and morbidity severely concern the Western community, where numerous clinical trials and research for a cure are in process. In order to al-leviate patients from the severe symptoms of the disease, avoiding the side effects, Botanical Medicine exhibits concrete evidence, as a gold candidate, to be the salvation to the problem. The Preferred Reporting Items for Systematic Review (PRISMA) protocol has been used to achieve extensive research on the topic, focusing on the identification and evaluation of the phytochemical properties of common medicinal plants. Meta-analysis has also been imple-mented on the results of published literature. Forest plots have been plotted, comparing and evaluating the results’ validity and significance. The meta-analysis results have undoubtedly demonstrated the importance and significance of the medicinal plants and their properties against various clinical complications, focusing on the pathogenicity of SCD. Surprisingly, their effectiveness to suppress haemoglobin polymerisation and increase the Fe 2+ /Fe 3+ ratio in patients, en-hanced the normal morphological erythrocytes’ appearance by suppressing the sickle shape of drepanocytes. Research made on the epidemiology of SCD asso-ciates the disease with the geographical frequency of malaria infection. Based on the natural selection theory of Charles Darwin, nature aids in the popula-tion’s survival by the endemicity of various medicinal plants in areas with increased SCD patients. Limitations to the medicinal plants’ consumptions and further therapeutic options have been discussed.","PeriodicalId":65391,"journal":{"name":"美国分子生物学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70513590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
美国分子生物学期刊(英文)Pub Date : 2021-01-01DOI: 10.4236/ajmb.2021.111002
Jane Sadhna Jagernath, Shuai Meng, Jiehua Qiu, Shi Huanbin, Yanjun Kou
{"title":"Selective Degradation of Mitochondria by Mitophagy in Pathogenic Fungi","authors":"Jane Sadhna Jagernath, Shuai Meng, Jiehua Qiu, Shi Huanbin, Yanjun Kou","doi":"10.4236/ajmb.2021.111002","DOIUrl":"https://doi.org/10.4236/ajmb.2021.111002","url":null,"abstract":"Selective mitochondrial autophagy or mitophagy is an evolutionarily conserved cellular process that selectively degrades superfluous, damaged, and dysfunctional mitochondria. This process is believed to be a mitochondrial quality control system crucial for intracellular homeostasis. Recently, researchers developed a range of methods to induce mitophagy and a variety of assays to monitor this process. With these new methods, the research on mitophagy has been developed rapidly. In particular, some key receptors and regulatory factors in fungi have been identified, which provides a basis for further understanding of the mechanism of this process. Although it has been studied extensively in the model yeast Saccharomyces cerevisiae, mitophagy in pathogenic fungi remains poorly understood. However recent studies have shown that mitophagy is involved in the regulation of pathogenicity of pathogenic fungi, which greatly increases the importance of mitophagy. Therefore, it is necessary to review the current research on mitophagy in order to provide an accurate understanding of mitophagy and promote mitophagy research in the pathogenic fungi.","PeriodicalId":65391,"journal":{"name":"美国分子生物学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70513540","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
美国分子生物学期刊(英文)Pub Date : 2020-12-18DOI: 10.4236/ajmb.2021.111001
I. Rosales, Laura Salazar, Daniel Luna, A. Negrón, I. Bdikin, B. Rodriguez, A. Heredia
{"title":"Self-Assembly of Amyloid-Beta and Its Piezoelectric Properties","authors":"I. Rosales, Laura Salazar, Daniel Luna, A. Negrón, I. Bdikin, B. Rodriguez, A. Heredia","doi":"10.4236/ajmb.2021.111001","DOIUrl":"https://doi.org/10.4236/ajmb.2021.111001","url":null,"abstract":"Investigating amyloid nanofibril self-assembly, with an emphasis on the electromechanical property of amyloid peptides, namely, piezoelectricity, may have several important implications: 1) the self-assembly process can hinder the biological stability and give rise to the formation of amyloid structures associated with neurodegenerative diseases; 2) investigations in this field may lead to an improved understanding of high-performance, functional biological nanomaterials, 3) new technologies could be established based on peptide self-assembly and the resultant functional properties, e.g., in the creation of a piezoelectric device formed with vertical diphenylalanine peptide tubes as a piezoelectric biosensor, and 4) new knowledge can be generated about neurodegenerative disorders, potentially yielding new therapies. Therefore, in this review, we will present the current investigations associated with self-assembly of amyloid-beta, the mechanisms that generate new structures, as well as theoretical calculations exploring the functionality of the structures under physiological pressure and electric field.","PeriodicalId":65391,"journal":{"name":"美国分子生物学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42052727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
美国分子生物学期刊(英文)Pub Date : 2020-09-09DOI: 10.4236/ajmb.2020.104017
H. Ahmed, Nassreldeen Khalid Abdelrahman, M. A. Adam
{"title":"The Prevalence of Human Metapneumovirus among Children with Acute Respiratory Tract Infection in North Kordofan State, Sudan","authors":"H. Ahmed, Nassreldeen Khalid Abdelrahman, M. A. Adam","doi":"10.4236/ajmb.2020.104017","DOIUrl":"https://doi.org/10.4236/ajmb.2020.104017","url":null,"abstract":"Objective: To determine the prevalence of human metapneumovirus (hMPV) among children with acute respiratory tract infection and the correlation between (hMPV) and age group. Methods: This prospective, descriptive cross-sectional hospital-based study is carried out from January to May 2019 among children from under five years old who were admitted to El-Obeid pediatric teaching Hospital, North kordofan, Sudan with acute respiratory tract infection. Results: Fifty hospitalized children with acute respiratory tract infection were enrolled in the study. Two of these (4%) were tested positive for (hMPV) in the age group (7 months - 2 years) old. Moreover, the study showed no significant correlation between infection with (hMPV) and age.","PeriodicalId":65391,"journal":{"name":"美国分子生物学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49149239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
美国分子生物学期刊(英文)Pub Date : 2020-09-09DOI: 10.4236/ajmb.2020.104019
K. Tun, A. Z. Latt, Win Naing, S. Htwe, Y. K. Ko, W. Mar, S. Hlaing, Wai Wai Han, S. Win
{"title":"Identification of JAK2 (V617F) Mutation in Myeloproliferative Neoplasms by Using Allele Specific Polymerase Chain Reaction (AS-PCR)","authors":"K. Tun, A. Z. Latt, Win Naing, S. Htwe, Y. K. Ko, W. Mar, S. Hlaing, Wai Wai Han, S. Win","doi":"10.4236/ajmb.2020.104019","DOIUrl":"https://doi.org/10.4236/ajmb.2020.104019","url":null,"abstract":"Myeloproliferative neoplasms (MPNs) are a group of clonal haematopoietic stem cell disorders characterized by the proliferation of one or more myeloid cell lineages. According to WHO classification, the Janus associated kinase 2 (JAK2) V617F mutation is one of the major diagnostic criteria in BCR-ABL1 negative myeloproliferative neoplasms. The aim of this study is to detect the JAK2 (V617F) mutation in patients with myeloproliferative neoplasms to get accurate diagnosis and proper management. A total of 90 clinically diagnosed MPN patients attending to Department of Clinical Haematology, Yangon General Hospital were enrolled in this study. The mean age was 53.4 ± 14 years which ranged from 16 to 81 years old and male and female ratio was 2.4:1. The identification of JAK2 (V617F) point mutation was found to be positive in 44/90 MPN patients (48.9%). According to MPN subtypes, the JAK2 mutation positivity was found in 19 out of 46 polycythemia vera patients (41.3%), 17 out of 25 essential thrombocythemia patients (68%), 8 out of 15 primary myelofibrosis patients (53.3%), 0 of 4 others myeloproliferative neoplasms (0%). Confirmation of each of nine JAK2 mutation positive and negative samples was done by Sanger sequencing. The arterial or venous thrombotic attack was found in 32/44 JAK2 mutation positive cases (72.7%) and 12/44 JAK2 mutation negative cases (27.3%). The association between thrombotic attack and presence of JAK2 mutation was statistically significance with p = 0.000. The diagnosis of myeloproliferative neoplasms mainly relies on the molecular genetics according to WHO classification. The Allele specific PCR reaction is sensitive, simple test and relatively cost-effective. Therefore, the identification of JAK2 (V617F) somatic point mutation by AS-PCR should be implemented as a routine diagnosis procedure for patients with chronic and suspected myeloproliferative neoplasms.","PeriodicalId":65391,"journal":{"name":"美国分子生物学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43417587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
美国分子生物学期刊(英文)Pub Date : 2020-09-09DOI: 10.4236/ajmb.2020.104018
Leticia Surian Batalini, S. Castro, Carla Geórgia Rodrigues Guimarães Souto, H. Neitzke-Abreu, M. Lima-Júnior
{"title":"Evaluation of DNA Extraction Methods for Detection of Leishmania by Polymerase Chain Reaction","authors":"Leticia Surian Batalini, S. Castro, Carla Geórgia Rodrigues Guimarães Souto, H. Neitzke-Abreu, M. Lima-Júnior","doi":"10.4236/ajmb.2020.104018","DOIUrl":"https://doi.org/10.4236/ajmb.2020.104018","url":null,"abstract":"There are several methods used to obtain DNA from cells; however, the quantity, integrity, and purity of DNA vary among the methods, which may interfere with the polymerase chain reaction (PCR) results. The objective was to determine the most efficient and cost-effective method that provides the best DNA yield and PCR results. Three methods of DNA isolation were compared: 20% sodium dodecyl sulfate (SDS), guanidine isothiocyanate-phenol-chloroform (GTPC), and DNA extraction using a commercial kit (GE Healthcare GenomicPrep Blood DNA Isolation KitTM). Human peripheral blood samples were inoculated with 104 promastigotes of Leishmania infantum. DNA was quantified and PCR was performed with 13A/13B primers. The results showed that a higher DNA yield was obtained using the GTPC technique (214.51 ng/μL), followed by SDS (26.16 ng/μL) and the commercial kit (10.99 ng/μL). We concluded that while all of the techniques were effective for obtaining DNA, the GTPC method provided the best yield and the brightest bands.","PeriodicalId":65391,"journal":{"name":"美国分子生物学期刊(英文)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47967756","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}