Microbiology and Immunology最新文献_第5页

Novel role of host protein SLC25A42 in the HIV-1 reactivation of latent HIV-1 provirus 宿主蛋白 SLC25A42 在潜伏 HIV-1 病毒重新激活过程中的新作用。

IF 2.6 4区医学

Microbiology and Immunology Pub Date : 2024-01-20 DOI: 10.1111/1348-0421.13114

Kei Taga, Hiroaki Takeuchi

{"title":"Novel role of host protein SLC25A42 in the HIV-1 reactivation of latent HIV-1 provirus","authors":"Kei Taga, Hiroaki Takeuchi","doi":"10.1111/1348-0421.13114","DOIUrl":"10.1111/1348-0421.13114","url":null,"abstract":"Despite the effectiveness of combination antiretroviral therapy, human immunodeficiency virus (HIV) infection remains incurable. To seek new strategies to overcome HIV type 1 (HIV-1) latency, one of the major barriers to HIV elimination, it is crucial to better understand how this state is maintained. Here, by means of an RNA interference screen employing an HIV-1 latency model using monocytic cell lines, we identified solute carrier family 25 member 42 (SLC25A42) as a potential host factor not previously known to affect HIV-1 latency. SLC25A42 knockdown resulted in increased HIV-1 expression, whereas forced expression of exogenous SLC25A42 suppressed it in SLC25A42-depleted cells. SLC25A42 depletion increased HIV-1 proviral transcriptional elongation but did not cause HIV-1 activation in an HIV-1 Tat-depleted latency model. This suggests that the role of SLC25A42 in HIV-1 transcription depends on HIV-1 Tat. Chromatin immunoprecipitation-qPCR analysis further revealed that SLC25A42 accumulated on or near the HIV-1 5ʹ long terminal repeat promoter region of the HIV-1 provirus, suggesting a possible role in regulating HIV-1 Tat near this promoter region. These results indicate that SLC25A42 plays a novel role in HIV-1 latency maintenance in monocytic HIV-1 reservoirs.","PeriodicalId":18679,"journal":{"name":"Microbiology and Immunology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1348-0421.13114","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139512931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Oral and rectal colonization of methicillin-resistant Staphylococcus aureus in long-term care facility residents and their association with clinical status 长期护理机构居民耐甲氧西林金黄色葡萄球菌的口腔和直肠定植及其与临床状况的关系。

IF 2.6 4区医学

Microbiology and Immunology Pub Date : 2024-01-17 DOI: 10.1111/1348-0421.13111

Satoru Kusaka, Azusa Haruta, Miki Kawada-Matsuo, Mi Nguyen-Tra Le, Mineka Yoshikawa, Toshiki Kajihara, Koji Yahara, Junzo Hisatsune, Ryota Nomura, Kazuhiro Tsuga, Hiroki Ohge, Motoyuki Sugai, Hitoshi Komatsuzawa

{"title":"Oral and rectal colonization of methicillin-resistant Staphylococcus aureus in long-term care facility residents and their association with clinical status","authors":"Satoru Kusaka, Azusa Haruta, Miki Kawada-Matsuo, Mi Nguyen-Tra Le, Mineka Yoshikawa, Toshiki Kajihara, Koji Yahara, Junzo Hisatsune, Ryota Nomura, Kazuhiro Tsuga, Hiroki Ohge, Motoyuki Sugai, Hitoshi Komatsuzawa","doi":"10.1111/1348-0421.13111","DOIUrl":"10.1111/1348-0421.13111","url":null,"abstract":"Staphylococcus aureus is a commensal bacterium in humans, but it sometimes causes opportunistic infectious diseases such as suppurative skin disease, pneumonia, and enteritis. Therefore, it is important to determine the prevalence of S. aureus and methicillin-resistant S. aureus (MRSA) in individuals, especially older adults. In this study, we investigated the prevalence of S. aureus and MRSA in the oral cavity and feces of residents in long-term care facilities (LTCFs). S. aureus was isolated from the oral cavity of 61/178 (34.3%) participants, including 28 MRSA-positive participants (15.7%), and from the feces of 35/127 (27.6%) participants, including 16 MRSA-positive participants (12.6%). S. aureus and MRSA were isolated from both sites in 19/127 individuals (15.0%) and 10/127 individuals (7.9%), respectively. Among 19 participants with S. aureus isolation from both sites, 17 participants showed the same sequence type (ST) type. Then, we analyzed the correlation of S. aureus and MRSA in the oral cavity and rectum with the participant's condition. S. aureus and MRSA positivity in the oral cavity was significantly related to tube feeding, while there was no correlation of rectal S. aureus/MRSA with any factors. Our findings regarding the oral inhabitation of MRSA and its risk factors indicate the importance of considering countermeasures against MRSA infection in LTCFs.","PeriodicalId":18679,"journal":{"name":"Microbiology and Immunology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2024-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139478884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strain identity of Bordetella pertussis isolates from household members based on whole-genome sequencing 根据全基因组测序鉴定从家庭成员中分离出的百日咳博德特氏菌的菌株特征。

IF 2.6 4区医学

Microbiology and Immunology Pub Date : 2024-01-15 DOI: 10.1111/1348-0421.13113

Kazunari Kamachi, Kentaro Koide, Nao Otsuka, Masataka Goto, Tsuyoshi Kenri

引用次数: 0

Issue Information – Cover 发行信息 - 封面

IF 2.6 4区医学

Microbiology and Immunology Pub Date : 2024-01-04 DOI: 10.1111/1348-0421.13112

引用次数: 0

Circ_0008410 contributes to fibroblast-like synoviocytes dysfunction by regulating miR-149-5p/HIPK2 axis Circ_0008410 通过调控 miR-149-5p/HIPK2 轴导致成纤维细胞样滑膜细胞功能障碍。

IF 2.6 4区医学

Microbiology and Immunology Pub Date : 2023-12-21 DOI: 10.1111/1348-0421.13110

Wensi Su, Zhifang Ye, Guangji Wang, Hui Huang, Yehan Fang

{"title":"Circ_0008410 contributes to fibroblast-like synoviocytes dysfunction by regulating miR-149-5p/HIPK2 axis","authors":"Wensi Su, Zhifang Ye, Guangji Wang, Hui Huang, Yehan Fang","doi":"10.1111/1348-0421.13110","DOIUrl":"10.1111/1348-0421.13110","url":null,"abstract":"Circular RNAs (circRNAs) play functional roles in rheumatoid arthritis (RA) progression. Fibroblast-like synoviocytes (RASFs) are the main effectors in RA development. In this study, we explored the function and mechanism of circ_0008410 in RASFs. qRT-PCR was used to detect the expression of circ_0008410, microRNA-149-5p (miR-149-5p), and homeodomain-interacting protein kinase 2 (HIPK2). Cell counting kit-8, EdU assay, flow cytometry, and transwell assay were performed to evaluate cell proliferation, apoptosis, migration, and invasion. Western blot measured the protein levels of related markers and HIPK2. The levels of IL-1β, TNF-α, and IL-6 were tested by corresponding ELISA kits and Western blot. The combination between miR-149-5p and circ_0008410 or HIPK2 was detected by dual-luciferase reporter assay or RNA immunoprecipitation (RIP) assay. Our data showed that circ_0008410 and HIPK2 were elevated, while miR-149-5p was downregulated in RA synovial tissues and RASFs. Circ_0008410 promoted RASF proliferation, migration, invasion, and inflammation while inhibiting apoptosis. MiR-149-5p was a target of circ_0008410, and its overexpression could reverse the promoting effects of circ_0008410 on RASF dysfunction. Moreover, miR-149-5p could target HIPK2 to suppress RASF proliferation, migration, invasion, and inflammation. Collectively, circ_0008410 promoted RASF dysfunction via miR-149-5p/HIPK2, which might provide a potential target for RA therapy.","PeriodicalId":18679,"journal":{"name":"Microbiology and Immunology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2023-12-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138830485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

RpoN (sigma factor 54) contributes to bacterial fitness during tracheal colonization of Bordetella bronchiseptica RpoN（sigma factor 54）有助于支气管败血波氏杆菌气管定植过程中的细菌适应性

IF 2.6 4区医学

Microbiology and Immunology Pub Date : 2023-12-17 DOI: 10.1111/1348-0421.13109

Xingyan Ma, Dendi K. Nugraha, Yukihiro Hiramatsu, Yasuhiko Horiguchi

{"title":"RpoN (sigma factor 54) contributes to bacterial fitness during tracheal colonization of Bordetella bronchiseptica","authors":"Xingyan Ma, Dendi K. Nugraha, Yukihiro Hiramatsu, Yasuhiko Horiguchi","doi":"10.1111/1348-0421.13109","DOIUrl":"10.1111/1348-0421.13109","url":null,"abstract":"The Gram-negative pathogenic bacterium Bordetella bronchiseptica is a respiratory pathogen closely related to Bordetella pertussis, the causative agent of whooping cough. Despite sharing homologous virulence factors, B. bronchiseptica infects a broad range of mammalian hosts, including some experimental animals, whereas B. pertussis is strictly adapted to humans. Therefore, B. bronchiseptica is often used as a representative model to explore the pathogenicity of Bordetella in infection experiments with laboratory animals. Although Bordetella virulence factors, including toxins and adhesins have been studied well, our recent study implied that unknown virulence factors are involved in tracheal colonization and infection. Here, we investigated bacterial genes contributing to tracheal colonization by high-throughput transposon sequencing (Tn-seq). After the screening, we picked up 151 candidate genes of various functions and found that a rpoN-deficient mutant strain was defective in tracheal colonization when co-inoculated with the wild-type strain. rpoN encodes σ54, a sigma factor that regulates the transcription of various genes, implying its contribution to various bacterial activities. In fact, we found RpoN of B. bronchiseptica is involved in bacterial motility and initial biofilm formation. From these results, we propose that RpoN supports bacterial colonization by regulating various bacteriological functions.","PeriodicalId":18679,"journal":{"name":"Microbiology and Immunology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2023-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1348-0421.13109","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138714334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

HPV vaccines induce trained immunity and modulate pro-inflammatory cytokine expression in response to secondary Toll-like receptor stimulations 人乳头瘤病毒疫苗诱导训练有素的免疫力，并在继发性 Toll 样受体刺激下调节促炎细胞因子的表达

IF 2.6 4区医学

Microbiology and Immunology Pub Date : 2023-12-17 DOI: 10.1111/1348-0421.13108

Mako Yamaguchi, Yohana S. Mtali, Hitomi Sonokawa, Ken Takashima, Yoshimi Fukushima, Takahisa Kouwaki, Hiroyuki Oshiumi

{"title":"HPV vaccines induce trained immunity and modulate pro-inflammatory cytokine expression in response to secondary Toll-like receptor stimulations","authors":"Mako Yamaguchi, Yohana S. Mtali, Hitomi Sonokawa, Ken Takashima, Yoshimi Fukushima, Takahisa Kouwaki, Hiroyuki Oshiumi","doi":"10.1111/1348-0421.13108","DOIUrl":"10.1111/1348-0421.13108","url":null,"abstract":"Cervical cancer is caused mostly by human papillomavirus (HPV), and several HPV vaccines have been developed to prevent its onset. Vaccines include antigens as well as adjuvants, with adjuvants playing an important role in activating the innate immune responses necessary for inducing adaptive immunological responses. Recent research has shown the presence of trained immunity inside the innate immune system. However, trained immunity conferred by HPV vaccinations is not well understood. In this work, we explored the innate immune responses and trained immunity caused by two HPV vaccines, Cervarix and Gardasil. Cervarix includes monophosphoryl lipid A and an aluminum adjuvant, and it significantly increased the expression of IL-6 and IFN-β mRNAs in RAW264.7 cells. On the contrary, Gardasil, which only includes an aluminum adjuvant, exhibited little cytokine expression but increased the expression of TLRs. Furthermore, Cervarix significantly increased IL-1β secretion from mouse macrophages, while Gardasil only mildly induced IL-1β secretion. Interestingly, initial stimulation with Gardasil enhanced the expression of IL-6 and TNF-α mRNAs upon secondary stimulation with TLR ligands, indicating that Gardasil induced trained immunity in macrophages. Moreover, Gardasil injection into mice resulted in enhanced TNF-α production in sera following secondary TLR stimulation. Our findings suggest that HPV vaccinations have the ability to induce trained immunity that modulate TLR ligand responses.","PeriodicalId":18679,"journal":{"name":"Microbiology and Immunology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2023-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138714561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of recombinant rotavirus carrying herpes simplex virus 2 glycoprotein D gene based on reverse genetics technology 基于反向遗传学技术开发携带单纯疱疹病毒 2 糖蛋白 D 基因的重组轮状病毒

IF 2.6 4区医学

Microbiology and Immunology Pub Date : 2023-12-14 DOI: 10.1111/1348-0421.13107

Yoshiki Kawamura, Satoshi Komoto, Saori Fukuda, Masanori Kugita, Shuang Tang, Amita Patel, Julianna R. Pieknik, Shizuko Nagao, Koki Taniguchi, Philip R. Krause, Tetsushi Yoshikawa

{"title":"Development of recombinant rotavirus carrying herpes simplex virus 2 glycoprotein D gene based on reverse genetics technology","authors":"Yoshiki Kawamura, Satoshi Komoto, Saori Fukuda, Masanori Kugita, Shuang Tang, Amita Patel, Julianna R. Pieknik, Shizuko Nagao, Koki Taniguchi, Philip R. Krause, Tetsushi Yoshikawa","doi":"10.1111/1348-0421.13107","DOIUrl":"10.1111/1348-0421.13107","url":null,"abstract":"Vaccine development for herpes simplex virus 2 (HSV-2) has been attempted, but no vaccines are yet available. A plasmid-based reverse genetics system for Rotavirus (RV), which can cause gastroenteritis, allows the generation of recombinant RV containing foreign genes. In this study, we sought to develop simian RV (SA11) as a vector to express HSV-2 glycoprotein D (gD2) and evaluated its immunogenicity in mice. We generated the recombinant SA11-gD2 virus (rSA11-gD2) and confirmed its ability to express gD2 in vitro. The virus was orally inoculated into suckling BALB/c mice and into 8-week-old mice. Serum IgG and IgA titers against RV and gD2 were measured by ELISA. In the 8-week-old mice inoculated with rSA11-gD2, significant increases in not only antibodies against RV but also IgG against gD2 were demonstrated. In the suckling mice, antibodies against RV were induced, but gD2 antibody was not detected. Diarrhea observed after the first inoculation of rSA11-gD2 in suckling mice was similar to that induced by the parent virus. A gD2 expressing simian RV recombinant, which was orally inoculated, induced IgG against gD2. This strategy holds possibility for genital herpes vaccine development.","PeriodicalId":18679,"journal":{"name":"Microbiology and Immunology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138692892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Azithromycin regulates bacterial virulence and immune response in a murine model of ceftazidime-treated Pseudomonas aeruginosa acute pneumonia 阿奇霉素在头孢他啶治疗铜绿假单胞菌急性肺炎小鼠模型中调节细菌毒力和免疫反应

IF 2.6 4区医学

Microbiology and Immunology Pub Date : 2023-12-10 DOI: 10.1111/1348-0421.13106

A.-G. Leroy, J. Caillon, A. Broquet, V. Lemabecque, S. Delanou, N. Caroff, K. Asehnoune, A. Roquilly, L. Crémet

{"title":"Azithromycin regulates bacterial virulence and immune response in a murine model of ceftazidime-treated Pseudomonas aeruginosa acute pneumonia","authors":"A.-G. Leroy, J. Caillon, A. Broquet, V. Lemabecque, S. Delanou, N. Caroff, K. Asehnoune, A. Roquilly, L. Crémet","doi":"10.1111/1348-0421.13106","DOIUrl":"10.1111/1348-0421.13106","url":null,"abstract":"Pseudomonas aeruginosa (PA) remains one of the leading causes of nosocomial acute pneumonia. The array of virulence factors expressed by PA and the intense immune response associated with PA pneumonia play a major role in the severity of these infections. New therapeutic approaches are needed to overcome the high resistance of PA to antibiotics and to reduce the direct damage to host tissues. Through its immunomodulatory and anti-virulence effects, azithromycin (AZM) has demonstrated clinical benefits in patients with chronic PA respiratory infections. However, there is relatively little evidence in PA acute pneumonia. We investigated the effects of AZM, as an adjunctive therapy combined with ceftazidime (CAZ), in a murine model of PA acute pneumonia. We observed that the combined therapy (i) reduces the weight loss of mice 24 h post-infection (hpi), (ii) decreases neutrophil influx into the lungs at 6 and 24 hpi, while this effect is absent in a LPS-induced pneumonia or when PA is pretreated with antibiotics and mice do not receive any antibiotics, and that (iii) AZM, alone or with CAZ, modulates the expression of PA quorum sensing regulators and virulence factors (LasI, LasA, PqsE, PhzM, ExoS). Our findings support beneficial effects of AZM with CAZ on PA acute pneumonia by both bacterial virulence and immune response modulations. Further investigations are needed to clarify the exact underlying mechanisms responsible for the reduction of the neutrophils influx and to better discriminate between direct immunomodulatory properties of AZM, and indirect effects on neutrophilia resulting from bacterial virulence modulation.","PeriodicalId":18679,"journal":{"name":"Microbiology and Immunology","volume":null,"pages":null},"PeriodicalIF":2.6,"publicationDate":"2023-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138567237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Issue Information – Cover 发行资料-封面

IF 2.6 4区医学

Microbiology and Immunology Pub Date : 2023-12-07 DOI: 10.1111/1348-0421.13010

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