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Volume 61(5); May 2023
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Review
Influence of Microbiota on Vaccine Effectiveness: “Is the Microbiota the Key to Vaccine‑induced Responses?”
So-Hee Hong
J. Microbiol. 2023;61(5):483-494.   Published online April 13, 2023
DOI: https://doi.org/10.1007/s12275-023-00044-6
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AbstractAbstract
Vaccines are one of the most powerful tools for preventing infectious diseases. To effectively fight pathogens, vaccines should induce potent and long-lasting immune responses that are specific to the pathogens. However, not all vaccines can induce effective immune responses, and the responses vary greatly among individuals and populations. Although several factors, such as age, host genetics, nutritional status, and region, affect the effectiveness of vaccines, increasing data have suggested that the gut microbiota is critically associated with vaccine-induced immune responses. In this review, I discuss how gut microbiota affects vaccine effectiveness based on the clinical and preclinical data, and summarize possible underlying mechanisms related to the adjuvant effects of microbiota. A better understanding of the link between vaccine-induced immune responses and the gut microbiota using high-throughput technology and sophisticated system vaccinology approaches could provide crucial insights for designing effective personalized preventive and therapeutic vaccination strategies.

Citations

Citations to this article as recorded by  
  • Parasite-microbiota interactions: a pathway to innovative interventions for Chagas disease, leishmaniasis, and ascariasis
    Juan David Ramírez, Sergio Castañeda, Jill Weatherhead, Cristina Poveda
    Future Microbiology.2025; 20(2): 149.     CrossRef
  • Antibiotic-mediated dysbiosis leads to activation of inflammatory pathways
    Jemma J. Taitz, Jian Tan, Duan Ni, Camille Potier-Villette, Georges Grau, Ralph Nanan, Laurence Macia
    Frontiers in Immunology.2025;[Epub]     CrossRef
  • Microbiome and mycobiome cross-talk from an immunobiotic perspective in COVID-19 and post-acute COVID-19 syndrome
    Sunny Kumar, Zeel Bhatia, Sriram Seshadri
    Exploration of Immunology.2025;[Epub]     CrossRef
  • Gut Microbiota and Postbiotic Metabolites: Biotic Intervention for Enhancing Vaccine Responses and Personalized Medicine for Disease Prevention
    Naheed Mojgani, Sumel Ashique, Mehran Moradi, Masoumeh Bagheri, Ashish Garg, Monika Kaushik, Md Sadique Hussain, Sabina Yasmin, Mohammad Yousuf Ansari
    Probiotics and Antimicrobial Proteins.2025;[Epub]     CrossRef
  • Intestinal Microbiota and Its Effect on Vaccine-Induced Immune Amplification and Tolerance
    Yixin Liu, Jianfeng Zhou, Yushang Yang, Xiangzheng Chen, Longqi Chen, Yangping Wu
    Vaccines.2024; 12(8): 868.     CrossRef
  • Immune Cells, Gut Microbiota, and Vaccines: A Gender Perspective
    Pierluigi Rio, Mario Caldarelli, Monica Chiantore, Francesca Ocarino, Marcello Candelli, Antonio Gasbarrini, Giovanni Gambassi, Rossella Cianci
    Cells.2024; 13(6): 526.     CrossRef
  • Ruhao Dashi granules exert therapeutic effects on H1N1 influenza virus infection by altering intestinal microflora composition
    Wei Pan, Rui Wu, Qianyun Zhang, Yuan Ma, Jinxiang Xiang, Jingbo Wang, Jing Chen
    Frontiers in Microbiology.2024;[Epub]     CrossRef
  • When inflammatory stressors dramatically change, disease phenotypes may transform between autoimmune hematopoietic failure and myeloid neoplasms
    Xi-Chen Zhao, Bo Ju, Nuan-Nuan Xiu, Xiao-Yun Sun, Fan-Jun Meng
    Frontiers in Immunology.2024;[Epub]     CrossRef
  • Long Prime–Boost Interval and Heightened Anti-GD2 Antibody Response to Carbohydrate Cancer Vaccine
    Irene Y. Cheung, Audrey Mauguen, Shakeel Modak, Ellen M. Basu, Yi Feng, Brian H. Kushner, Nai Kong Cheung
    Vaccines.2024; 12(6): 587.     CrossRef
  • Baseline Gut Microbiota Was Associated with Long-Term Immune Response at One Year Following Three Doses of BNT162b2
    Li-Na Zhang, Jing-Tong Tan, Ho-Yu Ng, Yun-Shi Liao, Rui-Qi Zhang, Kwok-Hung Chan, Ivan Fan-Ngai Hung, Tommy Tsan-Yuk Lam, Ka-Shing Cheung
    Vaccines.2024; 12(8): 916.     CrossRef
  • Immunologische Konsequenzen bei frühgeborenen Kindern
    Josina M. Hofer, Dimitra E. Zazara, Anke Diemert, Petra Clara Arck
    Gynäkologische Endokrinologie.2023; 21(4): 261.     CrossRef
  • Ginsenoside Rb1 enhanced immunity and altered the gut microflora in mice immunized by H1N1 influenza vaccine
    Chuanqi Wan, Rufeng Lu, Chen Zhu, Haibo Wu, Guannan Shen, Yang Yang, Xiaowei Wu, Bangjiang Fang, Yuzhou He
    PeerJ.2023; 11: e16226.     CrossRef
  • Factors Influencing Microbiota in Modulating Vaccine Immune Response: A Long Way to Go
    Francesca Romana Ponziani, Gaetano Coppola, Pierluigi Rio, Mario Caldarelli, Raffaele Borriello, Giovanni Gambassi, Antonio Gasbarrini, Rossella Cianci
    Vaccines.2023; 11(10): 1609.     CrossRef
Journal Articles
Ten Novel Species Belonging to the Genus Flavobacterium, Isolated from Freshwater Environments: F. praedii sp. nov., F. marginilacus sp. nov., F. aestivum sp. nov., F. flavigenum sp. nov., F. luteolum sp. nov., F. gelatinilyticum sp. nov., F. aquiphilum sp. nov., F. limnophilum sp. nov., F. lacustre
Hyunyoung Jo , Miri S. Park , Yeonjung Lim , Ilnam Kang , Jang-Cheon Cho
J. Microbiol. 2023;61(5):495-510.   Published online May 23, 2023
DOI: https://doi.org/10.1007/s12275-023-00054-4
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AbstractAbstract
Eleven bacterial strains were isolated from freshwater environments and identified as Flavobacterium based on 16S rRNA gene sequence analyses. Complete genome sequences of the 11 strains ranged from 3.45 to 5.83 Mb with G + C contents of 33.41–37.31%. The average nucleotide identity (ANI) values showed that strains IMCC34515T and IMCC34518 belonged to the same species, while the other nine strains represented each separate species. The ANI values between the strains and their closest Flavobacterium species exhibited ≤ 91.76%, indicating they represent each novel species. All strains had similar characteristics such as being Gram-stain-negative, rod-shaped, and contained iso-C15:0 as the predominant fatty acid, menaquinone-6 as the respiratory quinone, and phosphatidylethanolamine and aminolipids as major polar lipids. Genomic, phylogenetic, and phenotypic characterization confirmed that the 11 strains were distinct from previously recognized Flavobacterium species. Therefore, Flavobacterium praedii sp. nov. (IMCC34515T = KACC 22282T = NBRC 114937T), Flavobacterium marginilacus sp. nov. (IMCC34673T = KACC 22284T = NBRC 114940T), Flavobacterium aestivum sp. nov. (IMCC34774T = KACC 22285T = NBRC 114941T), Flavobacterium flavigenum sp. nov. (IMCC34775T = KACC22286T = NBRC 114942T), Flavobacterium luteolum sp. nov. (IMCC34776T = KACC 22287T = NBRC 114943T), Flavobacterium gelatinilyticum sp. nov. (IMCC34777T = KACC 22288T = NBRC 114944T), Flavobacterium aquiphilum sp.nov. (IMCC34779T = KACC 22289T = NBRC 114945T), Flavobacterium limnophilum sp. nov. (IMCC36791T = KACC22290T = NBRC 114947T), Flavobacterium lacustre sp. nov. (IMCC36792T = KACC 22291T = NBRC 114948T), and Flavobacterium eburneipallidum sp. nov. (IMCC36793T = KACC 22292T = NBRC 114949T) are proposed as novel species.

Citations

Citations to this article as recorded by  
  • Indoor pollution of funeral homes and potential health risk of workers: A case study in central China
    Jinjun Ye, Zhengtao Ai, Lup Wai Chew
    Building and Environment.2025; 272: 112677.     CrossRef
  • Flavobacterium magnesitis sp. nov. and Flavobacterium zubiriense sp. nov., two novel Flavobacterium species isolated from alkaline magnesite residues
    Leonor Matos, Lorrie Maccarrio, Ana Paula Chung, Diogo N. Proença, Søren Sørensen, Paula V. Morais, Romeu Francisco
    International Journal of Systematic and Evolutionary Microbiology .2025;[Epub]     CrossRef
  • Comprehensive genome analysis of five novel flavobacteria: Flavobacterium piscisymbiosum sp. nov., Flavobacterium pisciphilum sp. nov., Flavobacterium flavipigmentatum sp. nov., Flavobacterium lipolyticum sp. nov. and Flavobacterium cupriresistens sp. nov
    Izzet Burcin Saticioglu, Hilal Ay, Soner Altun, Nihed Ajmi, Enes Said Gunduz, Huban Gocmen, Muhammed Duman
    Systematic and Applied Microbiology.2024; 47(4): 126518.     CrossRef
  • Leuconostoc aquikimchii sp. nov., a Lactic Acid Bacterium Isolated from Cabbage Watery Kimchi
    Subin Kim, Se Hee Lee, Ki Hyun Kim, Misun Yun
    Journal of Microbiology.2024; 62(12): 1089.     CrossRef
  • Overproduction of Xanthophyll Pigment in Flavobacterium sp. JSWR-1 under Optimized Culture Conditions
    Jegadeesh Raman, Young-Joon Ko, Jeong-Seon Kim, Da-Hye Kim, Soo-Jin Kim
    Journal of Microbiology and Biotechnology.2024; 34(3): 710.     CrossRef
  • Flavobacterium rivulicola sp. nov., Isolated from a Freshwater Stream
    Sumin Kim, Miri S. Park, Ilnam Kang, Jang-Cheon Cho
    Current Microbiology.2024;[Epub]     CrossRef
  • Congregibacter variabilis sp. nov. and Congregibacter brevis sp. nov. Within the OM60/NOR5 Clade, Isolated from Seawater, and Emended Description of the Genus Congregibacter
    Hyeonsu Tak, Miri S. Park, Hyerim Cho, Yeonjung Lim, Jang-Cheon Cho
    Journal of Microbiology.2024; 62(9): 739.     CrossRef
  • Validation List no. 213. Valid publication of new names and new combinations effectively published outside the IJSEM
    Aharon Oren, Markus Göker
    International Journal of Systematic and Evolutionary Microbiology .2023;[Epub]     CrossRef
Those Nematode‑Trapping Fungi That are not Everywhere: Hints Towards Soil Microbial Biogeography
Wei Deng , Fa Zhang , Davide Fornacca , Xiao-Yan Yang , Wen Xiao
J. Microbiol. 2023;61(5):511-523.   Published online April 6, 2023
DOI: https://doi.org/10.1007/s12275-023-00043-7
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AbstractAbstract
The existence of biogeography for microorganisms is a raising topic in ecology and researchers are employing better distinctions between single species, including the most rare ones, to reveal potential hidden patterns. An important volume of evidence supporting heterogeneous distributions for bacteria, archaea and protists is accumulating, and more recently a few efforts have targeted microscopic fungi. We propose an insight into this latter kingdom by looking at a group of soil nematode-trapping fungi whose species are well-known and easily recognizable. We chose a pure culture approach because of its reliable isolation procedures for this specific group. After morphologically and molecularly identifying all species collected from 2250 samples distributed in 228 locations across Yunnan province of China, we analyzed occurrence frequencies and mapped species, genera, and richness. Results showed an apparent cosmopolitan tendency for this group of fungi, including species richness among sites. However, only four species were widespread across the region, while nonrandom heterogeneous distributions were observed for the remaining 40 species, both in terms of statistical distribution of species richness reflected by a significant variance-to-mean ratio, as well as in terms of visually discernible spatial clusters of rare species and genera on the map. Moreover, several species were restricted to only one location, raising the question of whether endemicity exists for this microbial group. Finally, environmental heterogeneity showed a marginal contribution in explaining restricted distributions, suggesting that other factors such as geographical isolation and dispersal capabilities should be explored. These findings contribute to our understanding of the cryptic geographic distribution of microorganisms and encourage further research in this direction.

Citations

Citations to this article as recorded by  
  • Linking watershed formation with the phylogenetic distribution of a soil microscopic fungus in Yunnan Province, China
    Davide Fornacca, Wei Deng, Yaoquan Yang, Fa Zhang, Xiaoyan Yang, Wen Xiao
    BMC Microbiology.2024;[Epub]     CrossRef
  • Analysis of Nuclear Dynamics in Nematode-Trapping Fungi Based on Fluorescent Protein Labeling
    Liang Zhou, Zhiwei He, Keqin Zhang, Xin Wang
    Journal of Fungi.2023; 9(12): 1183.     CrossRef
Relationship Between Mycotoxin Production and Gene Expression in Fusarium graminearum Species Complex Strains Under Various Environmental Conditions
Wenwen Huang , Ping Zhou , Guanghui Shen , Tao Gao , Xin Liu , Jianrong Shi , Jianhong Xu , Jianbo Qiu
J. Microbiol. 2023;61(5):525-542.   Published online May 2, 2023
DOI: https://doi.org/10.1007/s12275-023-00046-4
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AbstractAbstract
The Fusarium graminearum species complex (FGSC) can produce various mycotoxins and is a major concern for food quantity and quality worldwide. In this study, we determined the effects of water activity ( aw), temperature, incubation time and their interactions on mycotoxin accumulation and the expression levels of biosynthetic genes in FGSC strains from maize samples in China. The highest deoxynivalenol (DON), 3-acetyldeoxynivalenol(3ADON) and 15-acetyldeoxynivalenol (15ADON) levels of the F. boothii and F. graminearum strains were observed at 0.98 aw/ 30 °C or 0.99 aw/ 25 °C. F. asiaticum and F. meridionale reached maximum nivalenol (NIV) and 4-acetylnivalenol (4ANIV) contents at 0.99 aw and 30 °C. With the extension of the incubation time, the concentrations of DON and NIV gradually increased, while those of their derivatives decreased. F. boothii, F. meridionale and one F. asiaticum strain had the highest zearalenone (ZEN) values at 0.95 aw and 25 °C, while the optimum conditions for the other F. asiaticum strain and F. graminearum were 0.99 aw and 30 °C. Four genes associated with trichothecene and zearalenone synthesis were significantly induced under higher water stress in the early stage of production. The results indicated independence of mycotoxin production and gene expression, as maximum amounts of these toxic metabolites were observed at higher aw in most cases. This study provides useful information for the monitoring and prevention of such toxins entering the maize production chain.

Citations

Citations to this article as recorded by  
  • Application of MOX Sensors to Determine the Emission of Volatile Compounds in Corn Groats as a Function of Vertical Pressure in the Silo and Moisture Content of the Bed
    Robert Rusinek, Aleksandra Żytek, Mateusz Stasiak, Joanna Wiącek, Marek Gancarz
    Sensors.2024; 24(7): 2187.     CrossRef
Silver Nanoparticles Modified with Polygonatum sibiricum Polysaccharide Improve Biocompatibility and Infected Wound Bacteriostasis
Ruonan Wang , Rongyu Li , Peng Zheng , Zicheng Yang , Cheng Qian , Zhou Wang , Senhe Qian
J. Microbiol. 2023;61(5):543-558.   Published online April 13, 2023
DOI: https://doi.org/10.1007/s12275-023-00042-8
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AbstractAbstract
Silver nanoparticles (AgNPs) exhibit strong antibacterial activity and do not easily induce drug resistance; however, the poor stability and biocompatibility in solution limit their widespread application. In this study, AgNPs were modified with Polygonatum sibiricum Polysaccharide (PSP) to synthesize PSP@AgNPs with good stability, biocompatibility, and antibacterial activity. When PSP@AgNP synthesis was performed under a reaction time of 70 min, a reaction temperature of 35 °C, and an AgNO3- to-PSP volume ratio of 1:1, the synthesized PSP@AgNPs were more regular and uniform than AgNPs, and their particle size was around 10 nm. PSP@AgNPs exhibited lower cytotoxicity and hemolysis, and stronger bacteriostatic activity. PSP@AgNPs damage the integrity and internal structure of cells, resulting in the leakage of intracellular nucleic acids and proteins. The rate of cell membrane damage in Escherichia coli and Staphylococcus aureus treated with PSP@ AgNPs increased by 38.52% and 43.75%, respectively, compared with that of AgNPs. PSP@AgNPs inhibit the activities of key enzymes related to antioxidant, energy and substance metabolism in cells. The inhibitory effects on the activities of superoxide dismutase (SOD), catalase (CAT), adenosine triphosphate enzyme (ATPase), malate dehydrogenase (MDH), and succinate dehydrogenase (SDH) in E. coli and S. aureus cells were significantly higher than those of AgNPs. In addition, compared with AgNPs, PSP@AgNPs promote faster healing of infected wounds. Therefore, PSP@AgNPs represent potential antibacterial agents against wound infections.

Citations

Citations to this article as recorded by  
  • Improving the biocompatibility and antibacterial efficacy of silver nanoparticles functionalized with (LLRR)3 antimicrobial peptide
    Rongyu Li, Jiaqing Mao, Peng Zheng, Ruonan Wang, Zicheng Yang, Senhe Qian
    World Journal of Microbiology and Biotechnology.2024;[Epub]     CrossRef
  • Advancing engineered approaches for sustainable wound regeneration and repair: Harnessing the potential of green synthesized silver nanoparticles
    J. Nandhini, E. Karthikeyan, E. Elizabeth Rani, V.S. Karthikha, D. Sakthi Sanjana, H. Jeevitha, S. Rajeshkumar, Vijayan Venugopal, A. Priyadharshan
    Engineered Regeneration.2024; 5(3): 306.     CrossRef
  • Effect of Polygonatum sibiricum on biological toxicity of zinc oxide nanoparticles during respiratory exposure
    Jingjing Yao, Wanqing Yang, Liang Tang, Dicheng Yang, Yan Xu, Shenmin Zhu, Jun Zhu
    RSC Advances.2024; 14(43): 31360.     CrossRef
  • Enhancing Healing of Infected Wounds with Glycerin‐Modified Sodium Alginate/Silk Sericin Composite Film Functionalized with Polygonatum sibiricum Polysaccharide‐Capped Silver Nanoparticles
    Zicheng Yang, Rongyu Li, Ruonan Wang, Senhe Qian
    ChemistrySelect.2024;[Epub]     CrossRef
  • Host Defense Peptides: Exploiting an Innate Immune Component Against Infectious Diseases and Cancer
    Taiwo Scholes Adewole, Oladiran Boniface Oladokun, Adenike Kuku
    International Journal of Peptide Research and Therapeutics.2024;[Epub]     CrossRef
  • Research progress on medicinal components and pharmacological activities of polygonatum sibiricum
    Ruilian Liu, Xili Zhang, Yuhan Cai, Shuang Xu, Qian Xu, Chengli Ling, Xin Li, Wenjiao Li, Pingan Liu, Wenlong Liu
    Journal of Ethnopharmacology.2024; 328: 118024.     CrossRef
  • A comprehensive review on the potential applications of medicine Polygonatum species in the food sector
    Mi Li, Bingzong Xie, Lewen Li, Yunge Zhang, Qingmin Chen, Jian Ju, Yanli Ma
    Food Bioscience.2024; 60: 104116.     CrossRef
  • Fabrication of Highly Stable Polyurushiol-Decorated Silver Nanoparticles and Evaluation of Their Antibacterial and Anti-Microalgae Activities
    Lu Zheng, Jide Zhu, Jipeng Chen, Yanlian Xu, Lilong Jiang
    Journal of Inorganic and Organometallic Polymers and Materials.2024;[Epub]     CrossRef
  • Metallic elements combine with herbal compounds upload in microneedles to promote wound healing: a review
    Xiao Tang, Li Li, Gehang You, Xinyi Li, Jian Kang
    Frontiers in Bioengineering and Biotechnology.2023;[Epub]     CrossRef
Tn5 Transposon-based Mutagenesis for Engineering Phage-resistant Strains of Escherichia coli BL21 (DE3)
Yinfeng Wang , Guanhua Xuan , Houqi Ning , Jiuna Kong , Hong Lin , Jingxue Wang
J. Microbiol. 2023;61(5):559-569.   Published online May 22, 2023
DOI: https://doi.org/10.1007/s12275-023-00048-2
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AbstractAbstract
Escherichia coli is a preferred strain for recombinant protein production, however, it is often plagued by phage infection during experimental studies and industrial fermentation. While the existing methods of obtaining phage-resistant strains by natural mutation are not efficient enough and time-consuming. Herein, a high-throughput method by combining Tn5 transposon mutation and phage screening was used to produce Escherichia coli BL21 (DE3) phage-resistant strains. Mutant strains PR281-7, PR338-8, PR339-3, PR340-8, and PR347-9 were obtained, and they could effectively resist phage infection. Meanwhile, they had good growth ability, did not contain pseudolysogenic strains, and were controllable. The resultant phage-resistant strains maintained the capabilities of producing recombinant proteins since no difference in mCherry red fluorescent protein expression was found in phage-resistant strains. Comparative genomics showed that PR281-7, PR338-8, PR339-3, and PR340-8 mutated in ecpE, nohD, nrdR, and livM genes, respectively. In this work, a strategy was successfully developed to obtain phage-resistant strains with excellent protein expression characteristics by Tn5 transposon mutation. This study provides a new reference to solve the phage contamination problem.
Comparison of Conjunctival Sac Microbiome between Low and High Myopic Eyes
Kang Xiao , Zhengyu Chen , Qin Long
J. Microbiol. 2023;61(5):571-578.   Published online April 21, 2023
DOI: https://doi.org/10.1007/s12275-023-00045-5
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AbstractAbstract
Microbial communities played a vital role in maintaining homeostasis of ocular surface. However, no studies explored the myopia-associated conjunctiva microbiota changes until now. In this study, conjunctival sac swab specimens were collected from 12 eyes of low myopia (LM), and 14 eyes of high myopia (HM) patients. The V3–V4 region of the 16S rRNA gene was amplified and then sequenced. Statistical analysis was performed to investigate differences in the taxonomy and diversity between two groups. Compared to LM, higher Ocular Surface Disease Index (OSDI) scores were observed in HM group. The Shannon index of the HM was lower than that of the LM group (P = 0.017). Principle coordinate analysis and Partial Least Squares Discrimination Analysis showed distinct microbiome composition between two groups. At the phylum level, there were higher relative abundances of Proteobacteria (68.27% vs 38.51%) and lower abundances of Actinobacteria (3.71% vs 9.19%) in HM, compared to LM group (P = 0.031, 0.010, respectively). At the genus level, the abundances of Acinetobacter in HM (18.16%) were significantly higher than the LM (6.52%) group (P = 0.011). Actinobacteria levels were negatively correlated with the myopic spherical equivalent and OSDI scores. Moreover, positive correlations were found between Proteobacteria levels and OSDI scores, Acinetobacter levels were positively correlated with myopic spherical equivalent and OSDI scores. In conclusion, HM Patients have bacterial microbiota imbalance in the conjunctival sac, compared with LM patients. Proteobacteria, Actinobacteria, Acinetobacter may play roles in the HM associated ocular surface irritation.

Citations

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  • Gut Microbiota Profiles in Myopes and Nonmyopes
    Wan E. W. Omar, Gurdeep Singh, Andrew J. McBain, Fiona Cruickshank, Hema Radhakrishnan
    Investigative Ophthalmology & Visual Science.2024; 65(5): 2.     CrossRef
Chemokine CCL6 Plays Key Role in the Inhibitory Effect of Vitamin A on Norovirus Infection
Heetae Lee , Giljae Lee , You-Hee Cho , Youngcheon Song , GwangPyo Ko
J. Microbiol. 2023;61(5):579-587.   Published online May 26, 2023
DOI: https://doi.org/10.1007/s12275-023-00047-3
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AbstractAbstract
Norovirus (NoV) is the most common viral cause of acute gastroenteritis worldwide. Vitamin A has demonstrated the potential to protect against gastrointestinal infections. However, the effects of vitamin A on human norovirus (HuNoV) infections remain poorly understood. This study aimed to investigate how vitamin A administration affects NoV replication. We demonstrated that treatment with retinol or retinoic acid (RA) inhibited NoV replication in vitro based on their effects on HuNoV replicon-bearing cells and murine norovirus-1 (MNV-1) replication in murine cells. MNV replication in vitro showed significant transcriptomic changes, which were partially reversed by retinol treatment. RNAi knockdown of CCL6, a chemokine gene that was downregulated by MNV infection but upregulated by retinol administration, resulted in increased MNV replication in vitro. This suggested a role of CCL6 in the host response to MNV infections. Similar gene expression patterns were observed in the murine intestine after oral administration of RA and/or MNV-1.CW1. CCL6 directly decreased HuNoV replication in HG23 cells, and might indirectly regulate the immune response against NoV infection. Finally, relative replication levels of MNV-1.CW1 and MNV-1.CR6 were significantly increased in CCL6 knockout RAW 264.7 cells. This study is the first to comprehensively profile transcriptomes in response to NoV infection and vitamin A treatment in vitro, and thus may provide new insights into dietary prophylaxis and NoV infections.

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