{"title":"[Development of human iPS cell-derived alveolar and airway models using micropatterning plate for SARS-CoV-2 research].","authors":"Rina Hashimoto, Atsushi Masui, Shimpei Gotoh, Kazuo Takayama","doi":"10.2222/jsv.74.35","DOIUrl":"10.2222/jsv.74.35","url":null,"abstract":"<p><p>Advanced cell culture systems including human induced pluripotent stem (iPS) cells and organoids enable the generation of intricate structural and functional organ models in vitro. Application of these advanced cell culture systems to research on a wide range of diseases including infectious diseases is underway. Due to the impact of the coronavirus disease 2019 (COVID-19) pandemic, advanced cell culture systems in the virus research field are rapidly becoming popular. Respiratory models generated using human iPS cells and organoid technology are useful for analyzing respiratory cell responses caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. However, there is still room for the development of an apical-out model, which is essential for simple virus infection experiments, and a model that can analyze host responses in the alveoli and airways. In this study, we developed human iPS cell-derived alveolar and airway models with an apical-out structure by using a micropatterning plate. In the alveolar model, we confirmed that this model contains abundant type II alveolar epithelial (AT2) cells, which are the target cells of SARS-CoV-2 in the alveoli. In the airway model, we confirmed that this model contains abundant ciliated cells, which are the target cells of SARS-CoV-2 in the airway. Using our alveolar and airway models, we can analyze the differences in infection efficiency and host response of each SARS-CoV-2 variant. We hope that the human iPS cell-derived alveolar and airway models generated using a micropatterning plate will be used to analyze not only SARS-CoV-2 but also a wide range of respiratory viruses.</p>","PeriodicalId":75275,"journal":{"name":"Uirusu","volume":"74 1","pages":"35-44"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142775504","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}
UirusuPub Date : 2024-01-01DOI: 10.2222/jsv.74.107
Takahiro Hiono, Norikazu Isoda, Yoshihiro Sakoda
{"title":"[The current situation of H5 high pathogenicity avian influenza viruses in wild birds and mammals].","authors":"Takahiro Hiono, Norikazu Isoda, Yoshihiro Sakoda","doi":"10.2222/jsv.74.107","DOIUrl":"https://doi.org/10.2222/jsv.74.107","url":null,"abstract":"<p><p>H5 high pathogenicity avian influenza viruses, which emerged in Guangdong Province, China, in 1996, has now been persistently transmitted among various wild birds due to the \"silent spreading\" of the viruses among vaccinated poultry and domestic waterfowl. These viruses traveled long distances along with bird migration; therefore, the threat of H5 high pathogenicity avian influenza viruses is now a global issue. Furthermore, infection in wild mammals has become more prominent since 2020. The contamination of the wild bird population by the virus is considered to be an irreversible situation, and thus, the reduction of virus levels in the environment is an urgent issue to prevent further deterioration of the situation. This review will describe the history and current situations of influenza virus infection in wild birds and mammals, and discuss the research and countermeasures that are required to stop the damage caused by this virus.</p>","PeriodicalId":75275,"journal":{"name":"Uirusu","volume":"74 2","pages":"107-116"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143538218","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}
{"title":"[Data-Driven Research for Understanding and Predicting Viral Epidemics and Evolution].","authors":"Jumpei Ito","doi":"10.2222/jsv.74.49","DOIUrl":"10.2222/jsv.74.49","url":null,"abstract":"<p><p>The era of big data has begun in life sciences, and virology is no exception. Especially since COVID-19, virology has become one of the most genome data-rich fields in life sciences. In this article, I will introduce the new paradigm of \"understanding and predicting viral epidemics and evolution, \" made possible by the emergence of vast amounts of genome data, focusing on my research to date. Additionally, I would like to introduce our efforts toward advancing the field of viral informatics.</p>","PeriodicalId":75275,"journal":{"name":"Uirusu","volume":"74 1","pages":"49-56"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142775406","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}
{"title":"[Study of practical biorisk management in microbiological containment laboratories].","authors":"Yohei Kurosaki, Ken-Ichi Hanaki, Shuetsu Fukushi, Masayuki Shimojima, Yasuhiro Kawai, Asuka Nanbo, Katuaki Shinohara, Shintaro Shichinohe","doi":"10.2222/jsv.74.131","DOIUrl":"https://doi.org/10.2222/jsv.74.131","url":null,"abstract":"<p><p>Biosafety Level 4 facilities have been established in our country to promote research and development and national capacity of diagnostic test systems for infectious diseases, including highly pathogenic viruses. In particular, the operation of a suit-type laboratory requiring positive pressure protective suits is a first for our country, and it is necessary to establish unique safety management technology. With the support of the Research Program on Emerging and Re-emerging Infectious Diseases of the Japan Agency for Medical Research and Development (AMED), we conducted research entitled \"Study of Practical Biorisk Management in the Microbiological Containment Laboratories\" from 2021 to 2023, with the aim of improving biosafety management technology in Japan. We have summarized our research project and its results obtained for the future direction of biorisk management research in Japan.</p>","PeriodicalId":75275,"journal":{"name":"Uirusu","volume":"74 2","pages":"131-140"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143538216","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}
{"title":"[Analysis of RNA virus pathogenicity and development of novel prevention methods.]","authors":"Ryuta Uraki","doi":"10.2222/jsv.74.57","DOIUrl":"10.2222/jsv.74.57","url":null,"abstract":"<p><p>In the first quarter of the 21st century, infectious diseases caused by RNA viruses such as SARS, pandemic influenza viruses, MERS, Zika virus, and SARS-CoV-2 have spread. When such emerging and re-emerging viruses occur and spread, it is important for public health to quickly analyze the characteristics of these viruses and develop preventive measures. We found that the Zika virus causes damage to the testes, leading to testicular atrophy; that a vaccine based on mosquito salivary gland proteins suppresses mosquito-borne Zika virus transmission/infection; that the pathogenicity of SARS-CoV-2 Omicron variants BA.2, BA.4, and BA.5 isolated from patients is comparable to that of Omicron BA.1; and that a strategy targeting regulatory T cells to enhance vaccine efficacy is effective. Here, I would like to briefly discuss these findings.</p>","PeriodicalId":75275,"journal":{"name":"Uirusu","volume":"74 1","pages":"57-66"},"PeriodicalIF":0.0,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142775369","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}
UirusuPub Date : 2023-01-01DOI: 10.2222/jsv.73.139
Takao Masuda, Gota Kawai
{"title":"[Integrase and reversetranscriptase: New insights into the HIV genome replication system in line.]","authors":"Takao Masuda, Gota Kawai","doi":"10.2222/jsv.73.139","DOIUrl":"https://doi.org/10.2222/jsv.73.139","url":null,"abstract":"<p><p>Reverse transcriptase (RT) and integrase (IN) are retrovirus enzymes to convert virus genomic RNA into provirus DNA state in host cells. The RT and IN encoded tandemly in the pol gene, are translated as a fused form and incorporated into the virus particles. Recently, we discovered the potential role of HIV-1 IN to regulate the reverse transcription through the fused state with RT (RT-IN). On the other hand, analysis of HIV-1 transcripts have revealed the variations in number of guanine residue at the 5' end (5'G) due to fluctuations in the transcription initiation point within HIV-1 provirus DNA. Importantly, the number of 5'G dictates the packaging of HIV genome RNA into virus particles serving as a template for the reverse transcription reaction. In this review, we provide new insights into the mechanism of HIV genome replication based on our recent findings of the structural-functional correlation of HIV enzymes (RT and IN) and virus genomic RNA.</p>","PeriodicalId":75275,"journal":{"name":"Uirusu","volume":"73 2","pages":"139-146"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142334090","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}
UirusuPub Date : 2023-01-01DOI: 10.2222/jsv.73.153
Saya Moriyama
{"title":"[Neutralizing antibodies against SARS-CoV-2].","authors":"Saya Moriyama","doi":"10.2222/jsv.73.153","DOIUrl":"https://doi.org/10.2222/jsv.73.153","url":null,"abstract":"<p><p>Severe acute respiratory syndrome (SARS) corona virus 2 (SARS-CoV-2) is a novel coronavirus that infects humans and causes respiratory symptoms, resulting in a global pandemic since its appearance in 2019. Neutralizing antibody production is an important immune response following SARS-CoV-2 infection, and a great deal of research has been performed regarding the immune response against SARS-CoV-2 infection. However, SARS-CoV-2 is constantly changing and multiple amino acid reconstitutions accumulated in the spike protein enabled viruses to escape from immune responses, especially from neutralizing antibodies. In this review, the antibody responses to SARS-CoV-2 and the emergence of escape variants, and the development of broadly neutralizing antibodies will be introduced.</p>","PeriodicalId":75275,"journal":{"name":"Uirusu","volume":"73 2","pages":"153-162"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142334091","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}
引用次数: 0
UirusuPub Date : 2023-01-01DOI: 10.2222/jsv.72.167