Reviews
- Adenoviral Vector System: A Comprehensive Overview of Constructions, Therapeutic Applications and Host Responses
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Anyeseu Park, Jeong Yoon Lee
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J. Microbiol. 2024;62(7):491-509. Published online July 22, 2024
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DOI: https://doi.org/10.1007/s12275-024-00159-4
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7
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Abstract
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Adenoviral vectors are crucial for gene therapy and vaccine development, offering a platform for gene delivery into host cells. Since the discovery of adenoviruses, first-generation vectors with limited capacity have evolved to third-generation vectors flacking viral coding sequences, balancing safety and gene-carrying capacity. The applications of adenoviral vectors for gene therapy and anti-viral treatments have expanded through the use of in vitro ligation and homologous recombination, along with gene editing advancements such as CRISPR-Cas9. Current research aims to maintain the efficacy and safety of adenoviral vectors by addressing challenges such as pre-existing immunity against adenoviral vectors and developing new adenoviral vectors from rare adenovirus types and non-human species. In summary, adenoviral vectors have great potential in gene therapy and vaccine development. Through continuous research and technological advancements, these vectors are expected to lead to the development of safer and more effective treatments.
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- Engineering an oncolytic adenoviral platform for precise delivery of antisense peptide nucleic acid to modulate PD-L1 overexpression in cancer cells
Andrea Patrizia Falanga, Francesca Greco, Monica Terracciano, Stefano D’Errico, Maria Marzano, Sara Feola, Valentina Sepe, Flavia Fontana, Ilaria Piccialli, Vincenzo Cerullo, Hélder A. Santos, Nicola Borbone
International Journal of Pharmaceutics.2025; 668: 124941. CrossRef - Enhancing precision in cancer treatment: the role of gene therapy and immune modulation in oncology
Emile Youssef, Brandon Fletcher, Dannelle Palmer
Frontiers in Medicine.2025;[Epub] CrossRef - Protein-Based Degraders: From Chemical Biology Tools to Neo-Therapeutics
Lisha Ou, Mekedlawit T. Setegne, Jeandele Elliot, Fangfang Shen, Laura M. K. Dassama
Chemical Reviews.2025; 125(4): 2120. CrossRef - Intestinal mucus: the unsung hero in the battle against viral gastroenteritis
Waqar Saleem, Ateeqa Aslam, Mehlayl Tariq, Hans Nauwynck
Gut Pathogens.2025;[Epub] CrossRef - Chromatin structure and gene transcription of recombinant p53 adenovirus vector within host
Duo Ning, Yuqing Deng, Simon Zhongyuan Tian
Frontiers in Molecular Biosciences.2025;[Epub] CrossRef - Molecular Engineering of Virus Tropism
Bo He, Belinda Wilson, Shih-Heng Chen, Kedar Sharma, Erica Scappini, Molly Cook, Robert Petrovich, Negin P. Martin
International Journal of Molecular Sciences.2024; 25(20): 11094. CrossRef - Antisolvent 3D Printing of Gene-Activated Scaffolds for Bone Regeneration
Andrey Vyacheslavovich Vasilyev, Irina Alekseevna Nedorubova, Viktoria Olegovna Chernomyrdina, Anastasiia Yurevna Meglei, Viktoriia Pavlovna Basina, Anton Vladimirovich Mironov, Valeriya Sergeevna Kuznetsova, Victoria Alexandrovna Sinelnikova, Olga Anatol
International Journal of Molecular Sciences.2024; 25(24): 13300. CrossRef
- Minor and major circRNAs in virus and host genomes
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Zhihao Lou , Rui Zhou , Yinghua Su , Chun Liu , Wenting Ruan , Che Ok Jeon , Xiao Han , Chun Lin , Baolei Jia
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J. Microbiol. 2021;59(3):324-331. Published online February 23, 2021
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DOI: https://doi.org/10.1007/s12275-021-1021-z
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Abstract
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As a special type of noncoding RNA, circular RNAs (circRNAs)
are prevalent in many organisms. They can serve as sponges
for microRNAs and protein scaffolds, or templates for protein
translation, making them linked to cellular homeostasis
and disease progression. In recent years, circRNAs have been
found to be abnormally expressed during the processes of
viral infection and pathogenesis, and can help a virus escape
the immune response of a host. Thus, they are now considered
to play important functions in the invasion and development
of viruses. Moreover, the potential application of circRNAs
as biomarkers of viral infection or candidates for therapeutic
targeting deserves consideration. This review summarizes
circRNAs in the transcriptome, including their classification,
production, functions, and value as biomarkers. This review
paper also describes research progress on circRNAs in viral
infection (mainly hepatitis B virus, HIV, and some human
herpes viruses) and aims to provide new ideas for antiviral
therapies targeting circRNAs.
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- Host combats porcine reproductive and respiratory syndrome virus infection at non-coding RNAs level
Zhi Qin, Weiye Liu, Zhihua Qin, Hongliang Zhang, Xuewei Huang
Virulence.2024;[Epub] CrossRef - miRNA, lncRNA and circRNA: targeted molecules with therapeutic promises in Mycoplasma pneumoniae infection
Tian Gan, Jianwei Yu, Jun He
Archives of Microbiology.2023;[Epub] CrossRef - Circ_0138959/miR-495-3p/TRAF6 axis regulates proliferation, wound healing and osteoblastic differentiation of periodontal ligament cells in periodontitis
Wenjuan Deng, Xiaoliang Wang, Jin Zhang, Sainan Zhao
Journal of Dental Sciences.2022; 17(3): 1125. CrossRef - Epigenetic regulation in cardiovascular disease: mechanisms and advances in clinical trials
Yuncong Shi, Huanji Zhang, Suli Huang, Li Yin, Feng Wang, Pei Luo, Hui Huang
Signal Transduction and Targeted Therapy.2022;[Epub] CrossRef - Omics-based microbiome analysis in microbial ecology: from sequences to information
Jang-Cheon Cho
Journal of Microbiology.2021; 59(3): 229. CrossRef
Journal Article
- Carbohydrate-binding specificities of potential probiotic Lactobacillus strains in porcine jejunal (IPEC-J2) cells and porcine mucin
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Valerie Diane Valeriano , Bernadette B. Bagon , Marilen P. Balolong , Dae-Kyung Kang
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J. Microbiol. 2016;54(7):510-519. Published online June 28, 2016
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DOI: https://doi.org/10.1007/s12275-016-6168-7
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24
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Abstract
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Bacterial lectins are carbohydrate-binding adhesins that recognize
glycoreceptors in the gut mucus and epithelium of
hosts. In this study, the contribution of lectin-like activities
to adhesion of Lactobacillus mucosae LM1 and Lactobacillus
johnsonii PF01, which were isolated from swine intestine,
were compared to those of the commercial probiotic Lactobacillus
rhamnosus GG. Both LM1 and PF01 strains have
been reported to have good adhesion ability to crude intestinal
mucus of pigs. To confirm this, we quantified their adhesion
to porcine gastric mucin and intestinal porcine enterocytes
isolated from the jejunum of piglets (IPEC-J2). In addition,
we examined their carbohydrate-binding specificities by suspending
bacterial cells in carbohydrate solutions prior to adhesion
assays. We found that the selected carbohydrates affected
the adherences of LM1 to IPEC-J2 cells and of LGG to
mucin. In addition, compared to adhesion to IPEC-J2 cells,
adhesion to mucin by both LM1 and LGG was characterized
by enhanced specific recognition of glycoreceptor components
such as galactose, mannose, and N-acetylglucosamine.
Hydrophobic interactions might make a greater contribution
to adhesion of PF01. A similar adhesin profile between a probiotic
and a pathogen, suggest a correlation between shared
pathogen–probiotic glycoreceptor recognition and the ability
to exclude enteropathogens such as Escherichia coli K88 and
Salmonella Typhimurium KCCM 40253. These findings extend
our understanding of the mechanisms of the intestinal
adhesion and pathogen-inhibition abilities of probiotic Lactobacillus
strains.
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Citations
Citations to this article as recorded by

- Effects of Probiotics on Gut Microbiota: An Overview
Preethi Chandrasekaran, Sabine Weiskirchen, Ralf Weiskirchen
International Journal of Molecular Sciences.2024; 25(11): 6022. CrossRef - Safety assessment of five candidate probiotic lactobacilli using comparative genome analysis
Patrick Josemaria d.R Altavas, Mia Beatriz C. Amoranto, Sang Hoon Kim, Dae-Kyung Kang, Marilen P. Balolong, Leslie Michelle M. Dalmacio
Access Microbiology
.2024;[Epub] CrossRef - Galacto-oligosaccharides regulate intestinal mucosal sialylation to counteract antibiotic-induced mucin dysbiosis
Laipeng Xu, Xuan Li, Shuibing Han, Chunlong Mu, Weiyun Zhu
Food & Function.2024; 15(24): 12016. CrossRef - Isolation and Characterization of Lactic Acid Bacteria With Probiotic Attributes From Different Parts of the Gastrointestinal Tract of Free-living Wild Boars in Hungary
Tibor Keresztény, Balázs Libisch, Stephanya Corral Orbe, Tibor Nagy, Zoltán Kerényi, Róbert Kocsis, Katalin Posta, Péter P. Papp, Ferenc Olasz
Probiotics and Antimicrobial Proteins.2024; 16(4): 1221. CrossRef - Comparative Genome Analysis and Characterization of the Probiotic Properties of Lactic Acid Bacteria Isolated from the Gastrointestinal Tract of Wild Boars in the Czech Republic
Katerina Kavanova, Iveta Kostovova, Monika Moravkova, Tereza Kubasova, Vladimir Babak, Magdalena Crhanova
Probiotics and Antimicrobial Proteins.2024;[Epub] CrossRef - The Effects of Cellular Membrane Damage on the Long-Term Storage and Adhesion of Probiotic Bacteria in Caco-2 Cell Line
Jakub Kiepś, Wojciech Juzwa, Anna Olejnik, Anna Sip, Jolanta Tomaszewska-Gras, Radosław Dembczyński
Nutrients.2023; 15(15): 3484. CrossRef - Targeting gut microbiota and metabolism as the major probiotic mechanism - An evidence-based review
Teng Ma, Xin Shen, Xuan Shi, Hafiz Arbab Sakandar, Keyu Quan, Yalin Li, Hao Jin, Lai-Yu Kwok, Heping Zhang, Zhihong Sun
Trends in Food Science & Technology.2023; 138: 178. CrossRef - Difference analysis of intestinal microbiota and metabolites in piglets of different breeds exposed to porcine epidemic diarrhea virus infection
Zhili Li, Wandi Zhang, Langju Su, Zongyang Huang, Weichao Zhang, Liangliang Ma, Jingshuai Sun, Jinyue Guo, Feng Wen, Kun Mei, Saeed El-Ashram, Shujian Huang, Yunxiang Zhao
Frontiers in Microbiology.2022;[Epub] CrossRef - The effects of diet and gut microbiota on the regulation of intestinal mucin glycosylation
Dingwu Qu, Gang Wang, Leilei Yu, Fengwei Tian, Wei Chen, Qixiao Zhai
Carbohydrate Polymers.2021; 258: 117651. CrossRef - Immunomodulatory potential of four candidate probiotic Lactobacillus strains from plant and animal origin using comparative genomic analysis
Paul Benedic U. Salvador, Leslie Michelle M. Dalmacio, Sang Hoon Kim, Dae-Kyung Kang, Marilen P. Balolong
Access Microbiology
.2021;[Epub] CrossRef - Exoproteome Perspective on the Bile Stress Response of Lactobacillus johnsonii
Bernadette B. Bagon, Valerie Diane V. Valeriano, Ju Kyoung Oh, Edward Alain B. Pajarillo, Ji Yoon Lee, Dae-Kyung Kang
Proteomes.2021; 9(1): 10. CrossRef - Exploring the Bile Stress Response of Lactobacillus mucosae LM1 through Exoproteome Analysis
Bernadette B. Bagon, Ju Kyoung Oh, Valerie Diane V. Valeriano, Edward Alain B. Pajarillo, Dae-Kyung Kang
Molecules.2021; 26(18): 5695. CrossRef - Characterization of Lactic Acid Bacteria Isolated From the Gastrointestinal Tract of a Wild Boar as Potential Probiotics
Miao Li, Yi Wang, Hongyu Cui, Yongfeng Li, Yuan Sun, Hua-Ji Qiu
Frontiers in Veterinary Science.2020;[Epub] CrossRef - Characterisation of a lysophospholipase from Lactobacillus mucosae
Sang Hoon Kim, Ji Hoon Song, Jinyoung Kim, Dae-Kyung Kang
Biotechnology Letters.2020; 42(9): 1735. CrossRef - Quantifying and Engineering Mucus Adhesion of Probiotics
Zachary J. S. Mays, Todd C. Chappell, Nikhil U. Nair
ACS Synthetic Biology.2020; 9(2): 356. CrossRef - Immune boosting functional foods and their mechanisms: A critical evaluation of probiotics and prebiotics
Tolulope Joshua Ashaolu
Biomedicine & Pharmacotherapy.2020; 130: 110625. CrossRef - Bovine colostrum-driven modulation of intestinal epithelial cells for increased commensal colonisation
Sinead T. Morrin, Jonathan A. Lane, Mariarosaria Marotta, Lars Bode, Stephen D. Carrington, Jane A. Irwin, Rita M. Hickey
Applied Microbiology and Biotechnology.2019; 103(6): 2745. CrossRef - Probiotics interaction with foodborne pathogens: a potential alternative to antibiotics and future challenges
Murphy Lam Yim Wan, Stephen J. Forsythe, Hani El-Nezami
Critical Reviews in Food Science and Nutrition.2019; 59(20): 3320. CrossRef - Comparative genomic analysis of Lactobacillus mucosae LM1 identifies potential niche-specific genes and pathways for gastrointestinal adaptation
Valerie Diane V. Valeriano, Ju Kyoung Oh, Bernadette B. Bagon, Heebal Kim, Dae-Kyung Kang
Genomics.2019; 111(1): 24. CrossRef - Comparative exoproteome analyses of Lactobacillus spp. reveals species- and strain-specific proteins involved in their extracellular interaction and probiotic potential
Bernadette B. Bagon, Valerie Diane V. Valeriano, Ju Kyoung Oh, Edward Alain B. Pajarillo, Chun-Sung Cho, Dae-Kyung Kang
LWT.2018; 93: 420. CrossRef - Proteomic View of the Crosstalk between Lactobacillus mucosae and Intestinal Epithelial Cells in Co-culture Revealed by Q Exactive-Based Quantitative Proteomics
Edward Alain B. Pajarillo, Sang Hoon Kim, Valerie Diane Valeriano, Ji Yoon Lee, Dae-Kyung Kang
Frontiers in Microbiology.2017;[Epub] CrossRef - Probiotic roles ofLactobacillussp. in swine: insights from gut microbiota
V.D.V. Valeriano, M.P. Balolong, D.-K. Kang
Journal of Applied Microbiology.2017; 122(3): 554. CrossRef - Effect of apple extracts and selective polyphenols on the adhesion of potential probiotic strains of Lactobacillus gasseri R and Lactobacillus casei FMP
Tereza Volstatova, Petr Marsik, Vojtech Rada, Martina Geigerova, Jaroslav Havlik
Journal of Functional Foods.2017; 35: 391. CrossRef - Use of Atomic Force Microscopy to Study the Multi-Modular Interaction of Bacterial Adhesins to Mucins
A. Gunning, Devon Kavanaugh, Elizabeth Thursby, Sabrina Etzold, Donald MacKenzie, Nathalie Juge
International Journal of Molecular Sciences.2016; 17(11): 1854. CrossRef
Review
- REVIEW] Interaction of Candida albicans with host cells: virulence factors, host defense, escape strategies, and the microbiota
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Sarah Höfs , Selene Mogavero , Bernhard Hube
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J. Microbiol. 2016;54(3):149-169. Published online February 27, 2016
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DOI: https://doi.org/10.1007/s12275-016-5514-0
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Abstract
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The interaction between Candida albicans and its host cells is
characterized by a complex interplay between the expression
of fungal virulence factors, which results in adherence, invasion
and cell damage, and the host immune system, which
responds by secreting proinflammatory cytokines, activating
antimicrobial activities and killing the fungal pathogen. In
this review we describe this interplay by taking a closer look
at how C. albicans pathogenicity is induced and executed,
how the host responds in order to prevent and clear an infection,
and which mechanisms C. albicans has evolved to
bypass these immune responses to avoid clearance. Furthermore,
we review studies that show how the presence of other
microorganisms affects this interplay.
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Research Support, Non-U.S. Gov'ts
- Live/Dead State Is Not the Factor Influencing Adhesion Ability of Bifidobacterium animalis KLDS2.0603
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Li-Qun Wang , Feng Zhao , Fei Liu , Xiang-Chen Meng
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J. Microbiol. 2013;51(5):584-589. Published online September 14, 2013
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DOI: https://doi.org/10.1007/s12275-013-2632-9
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12
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Abstract
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Two essential requirements for probiotic bifidobacteria are that they be “live” and have “colonization” ability, following FAO/WHO guideline recommendations. The amount of research on the adhesion ability of bifidobacteria compares poorly with that of other probiotic bacteria, such as lactobacilli. The aim of the present study was to determine how gastrointestinal conditions affect the adhesion ability of bifidobacteria, and to investigate the relationship between the adhesion ability and the live/dead state of bifidobacteria. The adhesion ability of Bifidobacterium animalis KLDS2.0603 that had been subjected to the digestive enzymes, pepsin, trypsin, and proteinase K, was decreased significantly, but these treatments did not significantly change the strain’s survival rates, which were 98.78%, 97.60%, and 97.63% respectively. B. animalis KLDS2.0603 subjected to LiCl retained its adhesion ability but had a lower survival rate (59.28%) than the control group (P<0.01). B. animalis KLDS 2.0603 subjected to sodium metaperiodate exhibited higher adhesion ability than the control group (P<0.01), but the bacterial cells were killed totally. The results of transmission electron microscopy and laser scanning confocal microscopy showed that live/dead state of bifidobacteria was not one of the main factors that affected the adhesion ability of bifidobacteira, and that the substances affecting the adhesion ability of bifidobacteria were on the outer surface layer of the bifidobacterial cells. Our results also indicated that the substances related to the adhesion ability of bifidobacteria are proteinaceous. The above results will help us to understand the adhesion and colonization processes of bifidobacteria in the human gastrointestinal tract.
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Citations
Citations to this article as recorded by

- Alteration of the gut microbiome in patients with heart failure: A systematic review and meta-analysis
Jiayi Huang, Yongping Lin, Xiangwei Ding, Song Lin, Xin Li, Wei Yan, Minglong Chen
Microbial Pathogenesis.2024; 192: 106647. CrossRef - The Effects of Cellular Membrane Damage on the Long-Term Storage and Adhesion of Probiotic Bacteria in Caco-2 Cell Line
Jakub Kiepś, Wojciech Juzwa, Anna Olejnik, Anna Sip, Jolanta Tomaszewska-Gras, Radosław Dembczyński
Nutrients.2023; 15(15): 3484. CrossRef - Mechanism of Blood Cholesterol-Lowering Action of Parabiotics
Min Cheol Kim, Min-Goo Kim
Food Supplements and Biomaterials for Health.2023;[Epub] CrossRef - The Role of the PFNA Operon of Bifidobacteria in the Recognition of Host’s Immune Signals: Prospects for the Use of the FN3 Protein in the Treatment of COVID-19
Venera Z. Nezametdinova, Roman A. Yunes, Marina S. Dukhinova, Maria G. Alekseeva, Valery N. Danilenko
International Journal of Molecular Sciences.2021; 22(17): 9219. CrossRef - Comparison of microbial diversity in rumen and small intestine of Xinong Saanen dairy goats using 16S rRNA gene high-throughput sequencing
Cong Li, Yanan Geng, Ping Wang, Huaiping Shi, Jun Luo
Animal Production Science.2021; 62(14): 1379. CrossRef - Adhesion mechanisms of Bifidobacterium animalis subsp. lactis JCM 10602 to dietary fiber
Maria TANIGUCHI, Minori NAMBU, Yoshio KATAKURA, Shino YAMASAKI-YASHIKI
Bioscience of Microbiota, Food and Health.2021; 40(1): 59. CrossRef - Potential Immunomodulatory Activity of a Selected Strain Bifidobacterium bifidum H3-R2 as Evidenced in vitro and in Immunosuppressed Mice
Jiacui Shang, Feng Wan, Le Zhao, Xiangchen Meng, Bailiang Li
Frontiers in Microbiology.2020;[Epub] CrossRef - Antimicrobial and Immunomodulatory Effects of Bifidobacterium Strains: A Review
Hyun Jung Lim, Hea Soon Shin
Journal of Microbiology and Biotechnology.2020; 30(12): 1793. CrossRef - Using probiotics for type 2 diabetes mellitus intervention: Advances, questions, and potential
Zhongke Sun, Xuejiao Sun, Juan Li, Zhaoyang Li, Qingwei Hu, Lili Li, Xinqi Hao, Maoping Song, Chengwei Li
Critical Reviews in Food Science and Nutrition.2020; 60(4): 670. CrossRef - Effects of prebiotics on immunologic indicators and intestinal microbiota structure in perioperative colorectal cancer patients
Xiaoliang Xie, Yaqin He, Hai Li, Dong Yu, Li Na, Ting Sun, Dong Zhang, Xinrong Shi, Yuhan Xia, Tao Jiang, Shikuo Rong, Shaoqi Yang, Xiaoqiang Ma, Guangxian Xu
Nutrition.2019; 61: 132. CrossRef - Probiotic properties of Enterococcus strains isolated from traditional naturally fermented cream in China
Lidong Guo, Tingting Li, Yaru Tang, Lijie Yang, Guicheng Huo
Microbial Biotechnology.2016; 9(6): 737. CrossRef - Identification of surface-associated proteins of Bifidobacterium animalis ssp. lactis KLDS 2.0603 by enzymatic shaving
Dequan Zhu, Yu Sun, Fei Liu, Aili Li, Limei Yang, Xiang-Chen Meng
Journal of Dairy Science.2016; 99(7): 5155. CrossRef
- Berberine Inhibits HEp-2 Cell Invasion Induced by Chlamydophila pneumoniae Infection
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Li Jun Zhang , Li Jun Zhang , Wei Quan , Bei Bei Wang , Bing Ling Shen , Teng Teng Zhang , Yi Kang
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J. Microbiol. 2011;49(5):834-840. Published online November 9, 2011
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DOI: https://doi.org/10.1007/s12275-011-1051-z
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Abstract
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This study investigated the inhibitory effects of berberine on Chlamydophila (Chlamydia) pneumoniae infection-induced HEp-2 cell invasion and explored the possible mechanisms involved in this process. C. pneumoniae infection resulted in a significant increase in HEp-2 cell invasion when compared with the control cells (P<0.01) in a Matrigel invasion assay. This enhanced cell invasion was strongly suppressed by berberine (50 μM) (P<0.01). In a cell adhesion assay, the infection-induced HEp-2 cell adhesion to Matrigel was also significantly inhibited by berberine (P<0.01). C. pneumoniae infection was found to promote HEp-2 cell migration remarkably (P<0.01), which was markedly suppressed by berberine (P<0.01) in the cell migration assays. There were no statistically significant differences in the expression of matrix metalloproteinase-1 (MMP-1) and MMP-9 in the infected cells and berberine did not change the expression of MMP-1 and MMP-9. These data suggest that berberine inhibits C. pneumoniae infection-induced HEp-2 cell invasion through suppressing HEp-2 cell adhesion and migration, but not through changing the expression of MMP-1 and MMP-9.
Journal Article
- Evaluation of Antibacterial Activity against Salmonella Enteritidis
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Gaëlle Legendre , Fabienne Faÿ , Isabelle Linossier , Karine Vallée-Réhel
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J. Microbiol. 2011;49(3):349-354. Published online June 30, 2011
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DOI: https://doi.org/10.1007/s12275-011-0162-x
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Abstract
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Salmonella enterica serovar Enteritidis is a well-known pathogenic bacterium responsible for human gastrointestinal enteritis mainly due to the consumption of eggs and egg-products. The first aim of this work was to study several virulence factors of a strain isolated from egg content: SEovo. First, bacterial growth was studied at several temperatures and cell morphology was observed by scanning electronic microscopy. These experiments showed Salmonella’s ability to grow at low temperatures and to produce exoproducts. Next, Salmonella motility was observed performing swimming, twitching, and swarming tests. Results indicated a positive flagellar activity and the cell ability to differentiate and become hyperflagellated under specific conditions. Moreover, SEovo adherence and biofilm formation was carried out. All of these tests enabled us to conclude that SEovo is a potential pathogen, thus it can be used as a model to perform antibacterial experiments. The second part of the study was dedicated to the evaluation of the antibacterial activity of different molecules using several methods. The antibacterial effect of silver and copper aluminosilicates was tested by two different kinds of methods. On the one hand, the effect of these two antibacterial agents was determined using microbiological methods: viable cell count and agar-well diffusion. And on the other hand, the antibacterial activity was evaluated using CLSM and SYTO Red/SYTOX Green dyeing. CLSM allowed for the evaluation of the biocide on sessile cells, whereas the first methods did not. Results showed that adhered bacteria were more resistant than planktonic counterparts and that CLSM was a good alternative to evaluate antibacterial activity on fixed bacteria without having to carry out a removing step.
Research Support, Non-U.S. Gov'ts
- Asc1p, a Ribosomal Protein, Plays a Pivotal Role in Cellular Adhesion and Virulence in Candida albicans
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Se Woong Kim , Yoo Jin Joo , Joon Kim
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J. Microbiol. 2010;48(6):842-848. Published online January 9, 2011
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DOI: https://doi.org/10.1007/s12275-010-0422-1
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Abstract
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Candida albicans, the common human fungal pathogen, can switch morphology from yeast to pseudohyphal or hyphal form upon various environmental cues. It is well-known that the ability of morphological conversion and adhesive growth renders C. albicans virulent. It is noteworthy that every factor involved in the morphogenesis is known to be important for the virulence of this pathogen. To examine a functional
relevance of Asc1p, a ribosomal protein, in morphogenesis and virulence, an asc1 homozygous null mutant was generated. Although a normal morphological transition of the asc1 deletion strain in liquid media was found, it did not change its morphology on solid media. Moreover, the adhesion activity and hyphal-specific
gene expression were defective due to ASC1 deletion. Finally, it was found that the asc1 null mutant was avirulent in a mouse model. These results strongly suggested that Asc1p a component of the 40S ribosomal subunit and a signal transducer, plays a pivotal role in cellular adhesion and virulence through regulation of specific gene expression in C. albicans.
- Predicting the Chemical Composition and Structure of Aspergillus nidulans Hyphal Wall Surface by Atomic Force Microscopy
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Hyun-uk Lee , Jong Bae Park , Haeseong Lee , Keon-Sang Chae , Dong-Min Han , Kwang-Yeop Jahng
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J. Microbiol. 2010;48(2):243-248. Published online May 1, 2010
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DOI: https://doi.org/10.1007/s12275-010-8094-4
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In fungi, cell wall plays an important role in growth and development. Major macromolecular constituents of the aspergilli cell wall are glucan, chitin, and protein. We examined the chemical composition and structure of the Aspergillus nidulans hyphal wall surface by an atomic force microscope (AFM). To determine the composition of the cell wall surface, the adhesion forces of commercially available β-glucan, chitin, and various proteins were compared to those of corresponding fractions prepared from the hyphal wall. In both setups, the adhesion forces of β-glucan, chitin, and protein were 25-50, 1000-3000, and 125-300 nN, respectively. Adhesion force analysis demonstrated that the cell surface of the apical tip region might contain primarily chitin and β-glucan and relatively a little protein. This analysis also showed the chemical composition of the hyphal surface of the mid-region would be different from that of the apical region. Morphological images obtained by the tapping mode of AFM revealed that the hyphal tip surface has moderate roughness.
Journal Article
- Protective Immune Response of Bacterially-Derived Recombinant FaeG in Piglets
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Huang Yahong , Wanqi Liang , Aihu Pan , Zhiai Zhou , Qiang Wang , Cheng Huang , Jianxiu Chen , Dabing Zhang
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J. Microbiol. 2006;44(5):548-555.
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DOI: https://doi.org/2442 [pii]
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Abstract
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FaeG is the key factor in the infection process of K88ad enterotoxigenic Escherichia coli(ETEC) fimbrial adhesin. In an attempt to determine the possibility of expressing recombinant FaeG with immunogenicity for a new safe and high-production vaccine in E. coli, we constructed the recombinant strain, BL21 (DE3+K88), which harbors an expression vector with a DNA fragment of faeG, without a signal peptide. Results of 15% SDS-polyacrylamide slab gel analysis showed that FaeG can be stably over-expressed in BL21 (DE3+K88) as inclusion bodies without FaeE. Immunoglobulin G (IgG) and M (IgM) responses in pregnant pigs, with boost injections of the purified recombinant FaeG, were detected 4 weeks later in the sera and colostrum. An in vitro villius-adhesion assay verified that the elicited antibodies in the sera of vaccinated pigs were capable of preventing the adhesion of K88ad ETEC to porcine intestinal receptors. The protective effect on the mortality rates of suckling piglets born to vaccinated mothers was also observed one week after oral challenge with the virulent ETEC strain, C83907 (K88ad, CT+, ST+). The results of this study proved that the adhesin of proteinaceous bacterial fimbriae or pili could be overexpressed in engineered E. coli strains, with protective immune responses to the pathogen.