Journal of Microbiology

Full articles

Arctic lichen Cladonia borealis-induced cell death is mediated by p53-independent activation of Caspase-9 and PARP-1 signaling in human colorectal cancer cell lines: Ju-Mi Hong, Seul Ki Min, Kyung Hee Kim, Se Jong Han, Joung Han Yim, Sojin Kim, Youn-Jung Kim, Il-Chan Kim; J. Microbiol. 2025;63(4):e2412012. Published online April 29, 2025; DOI: https://doi.org/10.71150/jm.2412012

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Abstract PDF: The anti-cancer effects of Cladonia borealis (an Arctic lichen) methanol extract (CBME) on human colon carcinoma HCT116 cells were investigated for the first time. The proliferation of the HCT116 cells treated with CBME significantly decreased in a dose- and time-dependent manner. Flow cytometry results indicated that treatment with CBME resulted in significant apoptosis in the HCT116 cells. Furthermore, immunoblotting and qRT-PCR results revealed the expression of apoptosis-related marker genes and indicated a significant downregulation of the apoptosis regulator B-cell lymphoma expression and upregulation of the cleaved form of poly (ADP-ribose) polymerase as DNA repair and apoptosis regulators and central tumor suppressor p53. Therefore, CBME significantly inhibited cell proliferation by inducing apoptosis via the mitochondrial apoptotic pathway in colon carcinoma cells. Collectively, these data suggested that CBME contained one or more compounds with anti-cancer effects and could be a potential therapeutic agent. Further studies are required to identify candidate compounds and understand the mechanism of action of CBME.

The key pathways and genes related to oncolytic Newcastle disease virus-induced phenotypic changes in ovarian cancer cells: Wei Song, Yuan Yuan, Fangfang Cao, Huazheng Pan, Yaqing Liu; J. Microbiol. 2025;63(4):e2411018. Published online April 29, 2025; DOI: https://doi.org/10.71150/jm.2411018

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Abstract PDF Supplementary Material: The poor prognosis and high recurrence rate of ovarian cancer highlight the urgent need to develop new therapeutic strategies. Oncolytic Newcastle disease virus (NDV) can kill cancer cells directly and regulate innate and adaptive immunity. In this study, ovarian cancer cells infected with or without velogenic NDV-BJ were subjected to a CCK-8 assay for detecting cell proliferation, flow cytometry for detecting the cell cycle and apoptosis, and wound healing and transwell assays for detecting cell migration and invasion. Transcriptomic sequencing was conducted to identify the differentially expressed genes (DEGs). GO and KEGG enrichment analyses were performed to explore the mechanism underlying the oncolytic effect of NDV on ovarian cancer cells. The results showed that infection with NDV inhibited ovarian cancer cell proliferation, migration, and invasion; disrupted the cell cycle; and promoted apoptosis. Compared with those in negative control cells, the numbers of upregulated and downregulated genes in ovarian cancer cells infected with NDV were 1,499 and 2,260, respectively. Thirteen KEGG pathways related to cell growth and death, cell mobility, and signal transduction were significantly enriched. Among these pathways, 48 DEGs, especially SESN2, HLA B/C/E, GADD45B, and RELA, that may be involved in the oncolytic process were screened, and qPCR analysis verified the reliability of the transcription data. This study discovered some key pathways and genes related to oncolytic NDV-induced phenotypic changes in ovarian cancer cells, which will guide our future research directions and help further explore the specific mechanisms by which infection with NDV suppresses ovarian cancer development.

Journal Article

Upgrading Isoquercitrin Concentration via Submerge Fermentation of Mulberry Fruit Extract with Edible Probiotics to Suppress Gene Targets for Controlling Kidney Cancer and Inflammation: Md Rezaul Karim, Safia Iqbal, Shahnawaz Mohammad, Jong-Hoon Kim, Li Ling, Changbao Chen, Abdus Samad, Md Anwarul Haque, Deok-Chun Yang, Yeon Ju Kim, Dong Uk Yang; J. Microbiol. 2024;62(10):919-927. Published online October 8, 2024; DOI: https://doi.org/10.1007/s12275-024-00163-8

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Abstract

In recent years, kidney cancer has become one of the most serious medical issues. Kidney cancer is treated with a variety of active compounds that trigger genes that cause cancer. We identified in our earlier research that isoquercitrin (IQ) can activate PIK3CA, IGF1R, and PTGS2. However, it has a very low bioavailability because of its lower solubility in water. So, we utilized sub-merge fermentation technology with two well-known probiotics, Lactobacillus acidophilus and Bacillus subtilis, as a microbial source and mulberry fruit extract as a substrate, which has a high IQ level to improve IQ yield. Furthermore, we compared the total phenolic, flavonoid, and antioxidant contents of fermented and non-fermented samples, and we found that the fermented samples had greater levels than non-fermented sample. In addition, the high-performance liquid chromatography (HPLC) results showed that the fermented mulberry fruit extract from B. subtilis and L. acidophilus showed higher IQ values (190.73 ± 0.004 μg/ml and 220.54 ± 0.007 μg/ml, respectively), compared to the non-fermented samples, which had IQ values (80.12 ± 0.002 μg/ml). Additionally, at 62.5 µg/ml doses of each sample, a normal kidney cell line (HEK 293) showed higher cell viability for fermented and non-fermented samples. Conversely, at the same doses, the fermented samples of L. acidophilus and B. subtilis in a kidney cancer cell line (A498) showed an inhibition of cell growth around 36% and 31%, respectively. Finally, we performed RT and qRT PCR assay, and we found a significant reduction in the expression of the PTGS2, PIK3CA, and IGF1R genes. We therefore can conclude that the fermented samples have a higher concentration of isoquercitrin, and also can inhibit the expression of the genes PTGS2, PIK3CA, and IGF1R, which in turn regulates kidney cancer and inflammation.

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Recent research on the bioactivity of polyphenols derived from edible fungi and their potential in chronic disease prevention
Wenbin Yu, Yufei Zhang, Yi Lu, Zhiwei Ouyang, Jiahua Peng, Yayi Tu, Bin He
Journal of Functional Foods.2025; 124: 106627. CrossRef

Review

Adenoviral Vector System: A Comprehensive Overview of Constructions, Therapeutic Applications and Host Responses: Anyeseu Park, Jeong Yoon Lee; J. Microbiol. 2024;62(7):491-509. Published online July 22, 2024; DOI: https://doi.org/10.1007/s12275-024-00159-4

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Abstract

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

Journal Article

Genetically Engineered CLDN18.2 CAR-T Cells Expressing Synthetic PD1/CD28 Fusion Receptors Produced Using a Lentiviral Vector: Heon Ju Lee, Seo Jin Hwang, Eun Hee Jeong, Mi Hee Chang; J. Microbiol. 2024;62(7):555-568. Published online May 3, 2024; DOI: https://doi.org/10.1007/s12275-024-00133-0

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Abstract: This study aimed to develop synthetic Claudin18.2 (CLDN18.2) chimeric antigen receptor (CAR)-T (CAR-T) cells as a treatment for advanced gastric cancer using lentiviral vector genetic engineering technology that targets the CLDN18.2 antigen and simultaneously overcomes the immunosuppressive environment caused by programmed cell death protein 1 (PD-1). Synthetic CAR T cells are a promising approach in cancer immunotherapy but face many challenges in solid tumors. One of the major problems is immunosuppression caused by PD-1. CLDN18.2, a gastric-specific membrane protein, is considered a potential therapeutic target for gastric and other cancers. In our study, CLDN18.2 CAR was a second-generation CAR with inducible T-cell costimulatory (CD278), and CLDN18.2-PD1/CD28 CAR was a third-generation CAR, wherein the synthetic PD1/CD28 chimeric-switch receptor (CSR) was added to the second-generation CAR. In vitro, we detected the secretion levels of different cytokines and the killing ability of CAR-T cells. We found that the secretion of cytokines such as interferon-gamma (IFN-γ) and tumor necrosis factor-alpha (TNF-α) secreted by three types of CAR-T cells was increased, and the killing ability against CLDN18.2-positive GC cells was enhanced. In vivo, we established a xenograft GC model and observed the antitumor effects and off-target toxicity of CAR-T cells. These results support that synthetic anti-CLDN18.2 CAR-T cells have antitumor effect and anti-CLDN18.2-PD1/CD28 CAR could provide a promising design strategy to improve the efficacy of CAR-T cells in advanced gastric cancer.

Reviews

Metabolic Interaction Between Host and the Gut Microbiota During High‑Fat Diet‑Induced Colorectal Cancer: Chaeeun Lee, Seungrin Lee, Woongjae Yoo; J. Microbiol. 2024;62(3):153-165. Published online April 16, 2024; DOI: https://doi.org/10.1007/s12275-024-00123-2

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Abstract

Colorectal cancer (CRC) is the second-highest cause of cancer-associated mortality among both men and women worldwide. One of the risk factors for CRC is obesity, which is correlated with a high-fat diet prevalent in Western dietary habits. The association between an obesogenic high-fat diet and CRC has been established for several decades; however, the mechanisms by which a high-fat diet increases the risk of CRC remain unclear. Recent studies indicate that gut microbiota strongly infuence the pathogenesis of both high-fat diet-induced obesity and CRC. The gut microbiota is composed of hundreds of bacterial species, some of which are implicated in CRC. In particular, the expansion of facultative anaerobic Enterobacteriaceae, which is considered a microbial signature of intestinal microbiota functional imbalance (dysbiosis), is associated with both high-fat diet-induced obesity and CRC. Here, we review the interaction between the gut microbiome and its metabolic byproducts in the context of colorectal cancer (CRC) during high-fat diet-induced obesity. In addition, we will cover how a high-fat diet can drive the expansion of genotoxin-producing Escherichia coli by altering intestinal epithelial cell metabolism during gut infammation conditions.

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Wheat β-glucan reduces obesity and hyperlipidemia in mice with high-fat and high-salt diet by regulating intestinal flora
Min Li, Qingshan Wang, Xiuwei Zhang, Kaikai Li, Meng Niu, Siming Zhao
International Journal of Biological Macromolecules.2025; 288: 138754. CrossRef
Microbial Metabolites-induced Epigenetic Modifications for Inhibition of Colorectal Cancer: Current Status and Future Perspectives
Vaibhav Singh, Ekta Shirbhate, Rakesh Kore, Subham Vishwakarma, Shadiya Parveen, Ravichandran Veerasamy, Amit K Tiwari, Harish Rajak
Mini-Reviews in Medicinal Chemistry.2025; 25(1): 76. CrossRef
Deciphering the impact of dietary habits and behavioral patterns on colorectal cancer
Qihang Yuan, Jiahua Liu, Xinyu Wang, Chunchun Du, Yao Zhang, Lin Lin, Chengfang Wang, Zhijun Hong
International Journal of Surgery.2025; 111(3): 2603. CrossRef
Molecular Mechanisms of Skatole-Induced Inflammatory Responses in Intestinal Epithelial Caco-2 Cells: Implications for Colorectal Cancer and Inflammatory Bowel Disease
Katsunori Ishii, Kazuma Naito, Dai Tanaka, Yoshihito Koto, Koichi Kurata, Hidehisa Shimizu
Cells.2024; 13(20): 1730. CrossRef
Research Progress on the Relationship between Intestinal Flora and Gastrointestinal Malignancy
军陈
Advances in Clinical Medicine.2024; 14(11): 262. CrossRef
Host-Associated Microbiome
Woo Jun Sul
Journal of Microbiology.2024; 62(3): 135. CrossRef

The Microbiome Matters: Its Impact on Cancer Development and Therapeutic Responses: In‑Young Chung, Jihyun Kim, Ara Koh; J. Microbiol. 2024;62(3):137-152. Published online April 8, 2024; DOI: https://doi.org/10.1007/s12275-024-00110-7

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Abstract

In the evolving landscape of cancer research, the human microbiome emerges as a pivotal determinant reshaping our understanding of tumorigenesis and therapeutic responses. Advanced sequencing technologies have uncovered a vibrant microbial community not confned to the gut but thriving within tumor tissues. Comprising bacteria, viruses, and fungi, this diverse microbiota displays distinct signatures across various cancers, with most research primarily focusing on bacteria. The correlations between specifc microbial taxa within diferent cancer types underscore their pivotal roles in driving tumorigenesis and infuencing therapeutic responses, particularly in chemotherapy and immunotherapy. This review amalgamates recent discoveries, emphasizing the translocation of the oral microbiome to the gut as a potential marker for microbiome dysbiosis across diverse cancer types and delves into potential mechanisms contributing to cancer promotion. Furthermore, it highlights the adverse efects of the microbiome on cancer development while exploring its potential in fortifying strategies for cancer prevention and treatment.

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COVID-19, Long COVID, and Gastrointestinal Neoplasms: Exploring the Impact of Gut Microbiota and Oncogenic Interactions
do Rêgo Amália Cinthia Meneses, Araújo-Filho Irami
Archives of Cancer Science and Therapy.2024; 8(1): 054. CrossRef
Glycans in the oral bacteria and fungi: Shaping host-microbe interactions and human health
Xiameng Ren, Min Wang, Jiabao Du, Yu Dai, Liuyi Dang, Zheng Li, Jian Shu
International Journal of Biological Macromolecules.2024; 282: 136932. CrossRef
A Review of the Relationship between Tumors of the Biliary System and Intestinal Microorganisms
勇利李
Advances in Clinical Medicine.2024; 14(07): 833. CrossRef
Host-Associated Microbiome
Woo Jun Sul
Journal of Microbiology.2024; 62(3): 135. CrossRef

Journal Articles

Syntaxin17 Restores Lysosomal Function and Inhibits Pyroptosis Caused by Acinetobacter baumannii: Zhiyuan An, Wenyi Ding; J. Microbiol. 2024;62(4):315-325. Published online March 7, 2024; DOI: https://doi.org/10.1007/s12275-024-00109-0

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Abstract: Acinetobacter baumannii (A. baumannii) causes autophagy flux disorder by degrading STX17, resulting in a serious inflammatory response. It remains unclear whether STX17 can alter the inflammatory response process by controlling autolysosome function. This study aimed to explore the role of STX17 in the regulation of pyroptosis induced by A. baumannii. Our findings indicate that overexpression of STX17 enhances autophagosome degradation, increases LAMP1 expression, reduces Cathepsin B release, and improves lysosomal function. Conversely, knockdown of STX17 suppresses autophagosome degradation, reduces LAMP1 expression, augments Cathepsin B release, and accelerates lysosomal dysfunction. In instances of A. baumannii infection, overexpression of STX17 was found to improve lysosomal function and reduce the expression of mature of GSDMD and IL-1β, along with the release of LDH, thus inhibiting pyroptosis caused by A. baumannii. Conversely, knockdown of STX17 led to increased lysosomal dysfunction and further enhanced the expression of mature of GSDMD and IL-1β, and increased the release of LDH, exacerbating pyroptosis induced by A. baumannii. These findings suggest that STX17 regulates pyroptosis induced by A. baumannii by modulating lysosomal function.

The Revision of Lichen Flora Around Maxwell Bay, King George Island, Maritime Antarctic: Jae Eun So , Josef P. Halda , Soon Gyu Hong , Jae&# , Ji Hee Kim; J. Microbiol. 2023;61(2):159-173. Published online February 27, 2023; DOI: https://doi.org/10.1007/s12275-023-00015-x

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Abstract

Since the floristic study of lichens at the Barton and Weaver Peninsulas of King George Island in 2006, there have been intense investigations of the lichen flora of the two peninsulas as well as that of Fildes Peninsula and Ardley Island in Maxwell Bay, King George Island, South Shetland Islands, maritime Antarctic. In this study, a total of 104 species belonging to 53 genera, are identified from investigations of lichens that were collected in austral summer seasons from 2008 to 2016. Phenotypic and molecular analyses were incorporated for taxonomic identification. In particular, 31 species are found to be endemic to the Antarctic and 22 species are newly recorded to the Maxwell Bay region. Lepra dactylina, Stereocaulon caespitosum, and Wahlenbergiella striatula are newly recorded in the Antarctic, and the previously reported taxon Cladonia furcata is excluded from the formerly recorded list due to misidentification. We also provide ecological and geographical information about lichen associations and habitat preferences.

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Lichens of Larsemann Hills and adjacent oases in the area of Prydz Bay (Princess Elizabeth Land and MacRobertson Land, Antarctica)
Mikhail Andreev (Mихаил АНДРЕЕВ)
Polar Science.2023; 38: 101009. CrossRef

Functional analysis of ascP in Aeromonas veronii TH0426 reveals a key role in the regulation of virulence: Yongchao Guan , Meng Zhang , Yingda Wang , Zhongzhuo Liu , Zelin Zhao , Hong Wang , Dingjie An , Aidong Qian , Yuanhuan Kang , Wuwen Sun , Xiaofeng Shan; J. Microbiol. 2022;60(12):1153-1161. Published online November 10, 2022; DOI: https://doi.org/10.1007/s12275-022-2373-8

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Abstract

Aeromonas veronii is a pathogen which can induce diseases in humans, animals and aquatic organisms, but its pathogenic mechanism and virulence factors are still elusive. In this study, we successfully constructed a mutant strain (ΔascP) by homologous recombination. The results showed that the deletion of the ascP gene significantly down-regulated the expression of associated effector proteins in A. veronii compared to its wild type. The adhesive and invasive abilities of ΔascP to EPC cells were 0.82-fold lower in contrast to the wild strain. The toxicity of ΔascP to cells was decreased by about 2.91-fold (1 h) and 1.74-fold (2 h). Furthermore, the LD50 of the mutant strain of crucian carp was reduced by 19.94-fold, and the virulence was considerably attenuated. In contrast to the wild strain, the ΔascP content in the liver and spleen was considerably lower. The titers of serum cytokines (IL-8, TNF-α, and IL-1β) in crucian carp after the infection of the ΔascP strain were considerably lower in contrast to the wild strain. Hence, the ascP gene is essential for the etiopathogenesis of A. veronii TH0426.

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Complete genome sequence and genome-wide transposon mutagenesis enable the determination of genes required for sodium hypochlorite tolerance and drug resistance in pathogen Aeromonas veronii GD2019
Yifan Bu, Chengyu Liu, Yabo Liu, Wensong Yu, Tingjin Lv, Yuanxing Zhang, Qiyao Wang, Yue Ma, Shuai Shao
Microbiological Research.2024; 284: 127731. CrossRef
Construction of the flagellin F mutant of Vibrio parahaemolyticus and its toxic effects on silver pomfret (Pampus argenteus) cells
Yang Li, Chao Liu, Yuechen Sun, Ruijun Wang, Choufei Wu, Hanqu Zhao, Liqin Zhang, Dawei Song, Quanxin Gao
International Journal of Biological Macromolecules.2024; 259: 129395. CrossRef
Ferric uptake regulator (fur) affects the pathogenicity of Aeromonas veronii TH0426 by regulating flagellar assembly and biofilm formation
Jin-shuo Gong, Ying-da Wang, Yan-long Jiang, Di Zhang, Ya-nan Cai, Xiao-feng Shan, He Gong, Hao Dong
Aquaculture.2024; 580: 740361. CrossRef

Interaction between hypoviral-regulated fungal virulence factor laccase3 and small heat shock protein Hsp24 from the chestnut blight fungus Cryphonectria parasitica: Jeesun Chun† , Yo-Han Ko† , Dae-Hyuk Kim; J. Microbiol. 2022;60(1):57-62. Published online November 26, 2021; DOI: https://doi.org/10.1007/s12275-022-1498-0

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Abstract

Laccase3 is an important virulence factor of the fungus Cryphonectria parasitica. Laccase3 gene (lac3) transcription is induced by tannic acid, a group of phenolic compounds found in chestnut trees, and its induction is regulated by the hypovirus CHV1 infection. CpHsp24, a small heat shock protein gene of C. parasitica, plays a determinative role in stress adaptation and pathogen virulence. Having uncovered in our previous study that transcriptional regulation of the CpHsp24 gene in response to tannic acid supplementation and CHV1 infection was similar to that of the lac3, and that conserved phenotypic changes of reduced virulence were observed in mutants of both genes, we inferred that both genes were implicated in a common pathway. Building on this finding, in this paper we examined whether the CpHsp24 protein (CpHSP24) was a molecular chaperone for the lac3 protein (LAC3). Our pull-down experiment indicated that the protein products of the two genes directly interacted with each other. Heterologous co-expression of CpHsp24 and lac3 genes using Saccharomyces cerevisiae resulted in more laccase activity in the cotransformant than in a parental lac3-expresssing yeast strain. These findings suggest that CpHSP24 is, in fact, a molecular chaperone for the LAC3, which is critical component of fungal pathogenesis.

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Characteristics and expression of heat shock gene Lghsp17.4 in Lenzites gibbosa, a white rot fungus of wood
Lianrong Feng, Yujie Chi, Jian Zhang, Xuxin Yang, Shuying Han
Journal of Forestry Research.2024;[Epub] CrossRef
Hypovirus infection induces proliferation and perturbs functions of mitochondria in the chestnut blight fungus
Jinzi Wang, Rui Quan, Xipu He, Qiang Fu, Shigen Tian, Lijiu Zhao, Shuangcai Li, Liming Shi, Ru Li, Baoshan Chen
Frontiers in Microbiology.2023;[Epub] CrossRef
Applying molecular and genetic methods to trees and their fungal communities
Markus Müller, Ursula Kües, Katharina B. Budde, Oliver Gailing
Applied Microbiology and Biotechnology.2023; 107(9): 2783. CrossRef

Reviews

Rediscovery of antimicrobial peptides as therapeutic agents: Minkyung Ryu , Jaeyeong Park , Ji-Hyun Yeom , Minju Joo , Kangseok Lee; J. Microbiol. 2021;59(2):113-123. Published online February 1, 2021; DOI: https://doi.org/10.1007/s12275-021-0649-z

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Abstract

In recent years, the occurrence of antibiotic-resistant pathogens is increasing rapidly. There is growing concern as the development of antibiotics is slower than the increase in the resistance of pathogenic bacteria. Antimicrobial peptides (AMPs) are promising alternatives to antibiotics. Despite their name, which implies their antimicrobial activity, AMPs have recently been rediscovered as compounds having antifungal, antiviral, anticancer, antioxidant, and insecticidal effects. Moreover, many AMPs are relatively safe from toxic side effects and the generation of resistant microorganisms due to their target specificity and complexity of the mechanisms underlying their action. In this review, we summarize the history, classification, and mechanisms of action of AMPs, and provide descriptions of AMPs undergoing clinical trials. We also discuss the obstacles associated with the development of AMPs as therapeutic agents and recent strategies formulated to circumvent these obstacles.

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Cédric Couturier, Quentin Ronzon, Giulia Lattanzi, Iain Lingard, Sebastien Coyne, Veronique Cazals, Nelly Dubarry, Stephane Yvon, Corinne Leroi-Geissler, Obdulia Rabal Gracia, Joanne Teague, Sylvie Sordello, David Corbett, Caroline Bauch, Chantal Monlong,
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Runfeng Liu, Yuan Yang, Yue Zhang, Qinqiang Sun, Pingchuan Zhu, Huiyan Xu, Wei Zheng, Yangqing Lu, Qiang Fu
Food Chemistry.2024; 448: 139119. CrossRef
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Peptide Flexibility and the Hydrophobic Moment are Determinants to Evaluate the Clinical Potential of Magainins
Daniel Balleza
The Journal of Membrane Biology.2023; 256(4-6): 317. CrossRef
Evaluation of glycyl-arginine and lysyl-aspartic acid dipeptides for their antimicrobial, antibiofilm, and anticancer potentials
Handan Sevim Akan, Gülcan Şahal, Tuğçe Deniz Karaca, Özer Aylin Gürpınar, Meltem Maraş, Alev Doğan
Archives of Microbiology.2023;[Epub] CrossRef
The biological role of charge distribution in linear antimicrobial peptides
Harry Morales Duque, Gisele Rodrigues, Lucas Souza Santos, Octávio Luiz Franco
Expert Opinion on Drug Discovery.2023; 18(3): 287. CrossRef
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Walaa K. Mousa, Rose Ghemrawi, Tareq Abu-Izneid, Azza Ramadan, Farah Al-Marzooq
International Journal of Molecular Sciences.2023; 24(8): 6901. CrossRef
An injectable thermosensitive hydrogel with a self-assembled peptide coupled with an antimicrobial peptide for enhanced wound healing
Tianqi Feng, Hongyan Wu, Wendi Ma, Zhaoguo Wang, Chunli Wang, Yilong Wang, Siyao Wang, Mei Zhang, Linlin Hao
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Dissecting the relationship between antimicrobial peptides and mesenchymal stem cells
Amandda Évelin Silva-Carvalho, Marlon Henrique Cardoso, Thuany Alencar-Silva, Gabriela Muller Reche Bogéa, Juliana Lott Carvalho, Octávio Luiz Franco, Felipe Saldanha-Araujo
Pharmacology & Therapeutics.2022; 233: 108021. CrossRef
A Solid Support‐Based Synthetic Strategy for the Site‐Selective Functionalization of Peptides with Organometallic Half‐Sandwich Moieties
Dianna Truong, Nelson Y. S. Lam, Meder Kamalov, Mie Riisom, Stephen M. F. Jamieson, Paul W. R. Harris, Margaret A. Brimble, Nils Metzler‐Nolte, Christian G. Hartinger
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[MINIREVIEW]Regulation of gene expression by protein lysine acetylation in Salmonella: Hyojeong Koo , Shinae Park , Min-Kyu Kwak , Jung-Shin Lee; J. Microbiol. 2020;58(12):979-987. Published online November 17, 2020; DOI: https://doi.org/10.1007/s12275-020-0483-8

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Abstract

Protein lysine acetylation influences many physiological functions, such as gene regulation, metabolism, and disease in eukaryotes. Although little is known about the role of lysine acetylation in bacteria, several reports have proposed its importance in various cellular processes. Here, we discussed the function of the protein lysine acetylation and the post-translational modifications (PTMs) of histone-like proteins in bacteria focusing on Salmonella pathogenicity. The protein lysine residue in Salmonella is acetylated by the Pat-mediated enzymatic pathway or by the acetyl phosphate-mediated non-enzymatic pathway. In Salmonella, the acetylation of lysine 102 and lysine 201 on PhoP inhibits its protein activity and DNAbinding, respectively. Lysine acetylation of the transcriptional regulator, HilD, also inhibits pathogenic gene expression. Moreover, it has been reported that the protein acetylation patterns significantly differ in the drug-resistant and -sensitive Salmonella strains. In addition, nucleoid-associated proteins such as histone-like nucleoid structuring protein (H-NS) are critical for the gene silencing in bacteria, and PTMs in H-NS also affect the gene expression. In this review, we suggest that protein lysine acetylation and the post-translational modifications of H-NS are important factors in understanding the regulation of gene expression responsible for pathogenicity in Salmonella.

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Bacterial protein acetylation: mechanisms, functions, and methods for study
Jocelin Rizo, Sergio Encarnación-Guevara
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Miao Feng, Xiaoyu Yi, Yanling Feng, Feng He, Zonghui Xiao, Hailan Yao
Heliyon.2024; 10(15): e35326. CrossRef
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Yabo Liu, Mengqing Zhou, Yifan Bu, Liang Qin, Yuanxing Zhang, Shuai Shao, Qiyao Wang
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Hyojeong Koo, Eunna Choi, Shinae Park, Eun-Jin Lee, Jung-Shin Lee
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Journal Article

Evolutionary analysis and protein family classification of chitin deacetylases in Cryptococcus neoformans: Seungsue Lee , Hyun Ah Kang , Seong-il Eyun; J. Microbiol. 2020;58(9):805-811. Published online September 1, 2020; DOI: https://doi.org/10.1007/s12275-020-0288-9

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Abstract

Cryptococcus neoformans is an opportunistic fungal pathogen causing cryptococcal meningoencephalitis. Interestingly, the cell wall of C. neoformans contains chitosan, which is critical for its virulence and persistence in the mammalian host. C. neoformans (H99) has three chitin deacetylases (CDAs), which convert chitin to chitosan. Herein, the classification of the chitin-related protein (CRP) family focused on cryptococcal CDAs was analyzed by phylogenetics, evolutionary pressure (dN/dS), and 3D modeling. A phylogenetic tree of 110 CRPs revealed that they can be divided into two clades, CRP I and II with bootstrap values (> 99%). CRP I clade comprises five groups (Groups 1–5) with a total of 20 genes, while CRP II clade comprises sixteen groups (Groups 6–21) with a total of 90 genes. CRP I comprises only fungal CDAs, including all three C. neoformans CDAs, whereas CRP II comprises diverse CDAs from fungi, bacteria, and amoeba, along with other carbohydrate esterase 4 family proteins. All CDAs have the signal peptide, except those from group 11. Notably, CDAs with the putative O-glycosylation site possess either the glycosylphosphatidylinositol (GPI)-anchor motif for CRP I or the chitin-binding domain (CBD) for CRP II, respectively. This evolutionary conservation strongly indicates that the O-glycosylation modification and the presence of either the GPI-anchor motif or the chitin-binding domain is important for fungal CDAs to function efficiently at the cell surface. This study reveals that C. neoformans CDAs carrying GPI anchors have evolved divergently from fungal and bacterial CDAs, providing new insights into evolution and classification of CRP family.

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Chitin Deacetylase Homologous Gene cda Contributes to Development and Aflatoxin Synthesis in Aspergillus flavus
Xin Zhang, Meifang Wen, Guoqi Li, Shihua Wang
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Effects of altered N-glycan structures of Cryptococcus neoformans mannoproteins, MP98 (Cda2) and MP84 (Cda3), on interaction with host cells
Su-Bin Lee, Catia Mota, Eun Jung Thak, Jungho Kim, Ye Ji Son, Doo-Byoung Oh, Hyun Ah Kang
Scientific Reports.2023;[Epub] CrossRef
Novel Chitin Deacetylase from Thalassiosira weissflogii Highlights the Potential for Chitin Derivative Production
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Journal of Marine Science and Engineering.2022; 10(5): 598. CrossRef

Review

MINIREVIEW] Synthetic lethal interaction between oxidative stress response and DNA damage repair in the budding yeast and its application to targeted anticancer therapy: Ji Eun Choi , Woo-Hyun Chung; J. Microbiol. 2019;57(1):9-17. Published online December 29, 2018; DOI: https://doi.org/10.1007/s12275-019-8475-2

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Abstract

Synthetic lethality is an extreme form of negative genetic epistasis that arises when a combination of functional deficiency in two or more genes results in cell death, whereas none of the single genetic perturbations are lethal by themselves. This unconventional genetic interaction is a modification of the concept of essentiality that can be exploited for the purpose of targeted cancer therapy. The yeast Saccharomyces cerevisiae has been pivotally used for early large-scale synthetic lethal screens due to its experimental advantages, but recent advances in gene silencing technology have now made direct high-throughput analysis possible in higher organisms. Identification of tumor-specific alterations and characterization of the mechanistic principles underlying synthetic lethal interaction are the key to applying synthetic lethality to clinical cancer treatment by enabling genome-driven oncological research. Here, we provide emerging ideas on the synthetic lethal interactions in budding yeast, particularly between cellular processes responsible for oxidative stress response and DNA damage repair, and discuss how they can be appropriately utilized for context-dependent cancer therapeutics.

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