Article
Multidisciplinary Sciences
Shuangshuang Zhao, Qiuping Xu, Yanqin Cui, Su Yao, Sihui Jin, Qian Zhang, Zeyu Wen, Haihua Ruan, Xin Liang, Yanjie Chao, Sitang Gong, Philippe Sansonetti, Ke Wei, Hong Tang, Yaming Jiu
Summary: Intracellular bacteria can manipulate the host cytoskeleton to create spaces for replication. The Salmonella effector SopB rearranges the vimentin network to form cage-like structures around the bacteria. Inhibition of MEK1/2 results in vimentin dispersion and disrupts bacterial replication, demonstrating the importance of the SopB-Cdc42-MEK1/2 signaling axis in maintaining stable Salmonella-containing vacuoles.
NATURE COMMUNICATIONS
(2023)
Article
Cell Biology
Sheila Bandyopadhyay, Xiao Zhang, Andrea Ascura, Karen L. Edelblum, Edward M. Bonder, Nan Gao
Summary: In this study, a novel host regulator of enteric Salmonella infections, CDC42EP1, was identified. It was found that CDC42EP1 interacts with SEPTIN-7 and Villin, and its localization and engagement with bacteria depends on host CDC42 and S. Typhimurium's capability of activating CDC42. CDC42EP1 is not required for S. Typhimurium's initial cellular entry but contributes to the pathogen's intracellular growth and replication.
JOURNAL OF CELLULAR PHYSIOLOGY
(2023)
Article
Multidisciplinary Sciences
Lingyan Jiang, Peisheng Wang, Xiaorui Song, Huan Zhang, Shuangshuang Ma, Jingting Wang, Wanwu Li, Runxia Lv, Xiaoqian Liu, Shuai Ma, Jiaqi Yan, Haiyan Zhou, Di Huang, Zhihui Cheng, Chen Yang, Lu Feng, Lei Wang
Summary: S. Typhimurium infection induces upregulated glycolysis and decreased serine synthesis in host macrophages, leading to accumulation of glycolytic intermediates that promote bacterial replication and virulence.
NATURE COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Jennifer Barrila, Shameema F. Sarker, Nicole Hansmeier, Shanshan Yang, Kristina Buss, Natalia Briones, Jin Park, Richard R. Davis, Rebecca J. Forsyth, C. Mark Ott, Kevin Sato, Cristine Kosnik, Anthony Yang, Cheryl Shimoda, Nicole Rayl, Diana Ly, Aaron Landenberger, Stephanie D. Wilson, Naoko Yamazaki, Jason Steel, Camila Montano, Rolf U. Halden, Tom Cannon, Sarah L. Castro-Wallace, Cheryl A. Nickerson
Summary: This study investigated the effects of spaceflight on the physiology of human cells and microbial pathogens relevant to infectious disease, with a focus on the host-pathogen interactions. The results from the first in-flight infection and dual RNA-seq analysis using human cells provide valuable insights into the impact of space environment on cellular and molecular responses.
Article
Multidisciplinary Sciences
Vera Goser, Nathalie Sander, Marc Schulte, Felix Scharte, Rico Franzkoch, Viktoria Liss, Olympia E. E. Psathaki, Michael Hensel
Summary: Salmonella enterica remodels the host endosomal system to create a specific intracellular niche for survival and proliferation. Translocated effectors interact with endosomal vesicles, continuously fusing with Salmonella-containing vacuoles and induced filaments to ensure bacterial survival and proliferation.
NATURE COMMUNICATIONS
(2023)
Article
Multidisciplinary Sciences
Ori Heyman, Dror Yehezkel, Camilla Ciolli Mattioli, Neta Blumberger, Gili Rosenberg, Aryeh Solomon, Dotan Hoffman, Noa Bossel Ben-Moshe, Roi Avraham
Summary: Encounters between host cells and intracellular bacterial pathogens lead to complex phenotypes that determine the outcome of infection. Single-cell RNA sequencing (scRNA-seq) has limited capacity to analyze the role of bacterial factors. The scPAIR-seq method developed in this study enables functional analysis of mutant-dependent changes in host transcriptomes, providing insights into bacterial virulence strategies and their interplay with host defense strategies.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Biology
Marc Schulte, Katharina Olschewski, Michael Hensel
Summary: The study demonstrates that non-replicating Salmonella enterica serovar Typhimurium persisters, which are tolerant to antibiotics, can sense their environment and respond to stressors. This suggests that stress sensing and response of persisters may be targeted as an antimicrobial strategy.
COMMUNICATIONS BIOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Fangfang Huang, Suzhou Zhang, Xiaoling Li, Yuge Huang, Shasha He, Lianxiang Luo
Summary: This study investigated the role of ferroptosis-related gene STAT3 in ulcerative colitis and found that it could potentially serve as a biomarker for diagnosis and treatment of the disease.
FREE RADICAL BIOLOGY AND MEDICINE
(2022)
Review
Microbiology
Nora Kostow, Matthew D. Welch
Summary: Manipulation of host cell plasma membrane by intracellular bacterial pathogens is crucial for their infection. Bacteria employ various strategies to target and influence the composition and shape of the plasma membrane, taking advantage of pathways such as signal transduction, endocytosis, and exocytosis. Further investigation into the contributions of bacterial and host factors to plasma membrane manipulation will provide valuable insights into pathogenesis and fundamental principles of plasma membrane biology.
CURRENT OPINION IN MICROBIOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Qifeng Deng, Sidi Yang, Lanqing Sun, Kai Huang, Kedi Dong, Yuan Zhu, Yu Cao, Yuanyuan Li, Shuyan Wu, Rui Huang
Summary: Maintaining host iron homeostasis is crucial for nutritional immunity, and this study reveals a novel role of NLRP6 in regulating host iron metabolism and bacterial infection resistance. The mechanism involves NRF2 regulation through NLRP6/AKT interaction and AKT phosphorylation, affecting NRF2 nuclear translocation and KEAP1 transcription.
Article
Food Science & Technology
Yue Yi, Ahmed G. Abdelhamid, Yumin Xu, Ahmed E. Yousef
Summary: The study identified lytic Salmonella phages isolated from livestock farms in Ohio, USA, which showed activities against various Salmonella serovars, including Typhimurium and Enteritidis. The phages were found to be viable in acidic and alkaline environments as well as at temperatures ranging from 4 to 55 degrees Celsius. Combination of phage treatment and mild heat resulted in significant reductions in Salmonella Typhimurium and Salmonella Enteritidis levels in liquid whole eggs.
LWT-FOOD SCIENCE AND TECHNOLOGY
(2021)
Article
Cell Biology
Prajita Paul, Paritosh Patel, Suresh K. Verma, Pragyan Mishra, Bikash R. Sahu, Pritam Kumar Panda, Gajraj Singh Kushwaha, Shantibhusan Senapati, Namrata Misra, Mrutyunjay Suar
Summary: This study investigated the role of the Hha-TomB TA system in regulating the virulence of Salmonella enterica serovar Typhimurium, revealing that deletion of hha and tomB genes leads to impaired cell adhesion, invasion, and uptake, as well as reduced intracellular replication. The TA mutants did not induce acute colitis in mice and showed decreased dissemination to systemic organs. Additionally, inflammation phenotype was restored upon complementation of the TA genes.
CELL BIOLOGY AND TOXICOLOGY
(2022)
Article
Microbiology
Wenting Zhang, Lin Lyu, Zhihiong Xu, Jinjing Ni, Danni Wang, Jie Lu, Yu-Feng Yao
Summary: This study reveals the role of DNA methylation in the response of Salmonella enterica serovar Typhimurium (S. Typhimurium) to oxidative stress. The researchers found that there is no significant association between DNA methylation and transcription level in most genes, but there is a coincidence of level change between transcription and m6A GATC in certain regulatory regions. These findings provide new insights into the epigenetic regulatory mechanisms of gene expression in S. Typhimurium in the host microenvironment.
MICROBIOLOGY SPECTRUM
(2023)
Article
Biophysics
Jiahao Gong, Xingxing Cheng, Jinjiao Zuo, Yan Zhang, Jian Lin, Moxin Liu, Yan Jiang, Yunfeng Long, Hongbin Si, Xiuge Gao, Dawei Guo, Ning Gu
Summary: Silver nanoparticles have good biocompatibility and can enter cells to suppress Salmonella Typhimurium infection. In addition, silver nanoparticles can activate mouse dendritic cells and enhance immune function. The combination of silver nanoparticles and inactivated Salmonella Typhimurium can alleviate infection symptoms and improve platelet count in mice.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Article
Microbiology
Jing Zhuang, Xiaoyue Ji, Yue Zhu, Wei Liu, Jing Sun, Xinan Jiao, Xiulong Xu
Summary: A77 1726, an active metabolite of leflunomide, restricts intracellular Salmonella growth by inducing xenophagy through activating AMPK and ULK1 pathways. This study demonstrates that A77 1726 enhances autophagy in infected cells, leading to decreased intracellular Salmonella numbers in macrophages.
VETERINARY MICROBIOLOGY
(2021)
Article
Genetics & Heredity
Sandra Luna, Leire Torices, Janire Mingo, Laura Amo, Isabel Rodriguez-Escudero, Pablo Ruiz-Ibarlucea, Asier Erramuzpe, Jesus M. Cortes, Maria I. Tejada, Maria Molina, Caroline E. Nunes-Xavier, Jose I. Lopez, Victor J. Cid, Rafael Pulido
Summary: The PTEN tumor suppressor gene is frequently mutated in tumors and in cancer predisposition patients or those with macrocephaly associated with autism. A study has analyzed PTEN nonsense mutations and set standards for the potential restoration of full-length PTEN proteins from mutated PTEN genes through translational readthrough. The findings indicate that prevalent pathogenic PTEN mutations can be functionally restored through readthrough-inducing compounds, offering potential for precision interventions in specific patient groups.
Review
Biotechnology & Applied Microbiology
Manuel Sanchez-Angulo, Ignacio Lopez-Goni, Victor J. Cid
Summary: The COVID-19 pandemic has brought challenges for the education system at all levels, with student motivation and creativity being key concerns that need to be addressed. It has also highlighted the importance of microbiology as a core element in education and the opportunity to increase public awareness of the significance of microbes in everyday life.
INTERNATIONAL MICROBIOLOGY
(2021)
Article
Microbiology
Angela Sellers-Moya, Marcos Nuevalos, Maria Molina, Humberto Martin
Summary: Azoles, particularly clotrimazole, have a significant impact on the MAPK signaling in fungi, triggering deep changes in phosphorylation. Clotrimazole-induced ROS production and Slt2 phosphorylation are linked to PKA activity, while resistance depends on stress responses and novel signaling rewiring through the CWI pathway. The strong influence of azole treatment on MAPK signaling is conserved in other yeast species.
Article
Biochemistry & Molecular Biology
Julia Maria Coronas-Serna, Elba del Val, Jonathan C. Kagan, Maria Molina, Victor J. Cid
Summary: Toll-like receptor signaling plays a key role in detecting pathogens and initiating inflammation through supramolecular organizing centers (SMOCs), which rely on protein-protein interactions involving Toll Interleukin-1 Receptor (TIR) and Death Domain (DD).
Review
Microbiology
Gema Gonzalez-Rubio, Lucia Sastre-Vergara, Maria Molina, Humberto Martin, Teresa Fernandez-Acero
Summary: The cell wall integrity (CWI) MAPK pathway of budding yeast Saccharomyces cerevisiae plays a role in responding to cell wall damage and other stressful conditions. The activity of MAPK Slt2 drives the pathway's output by phosphorylating protein substrates, regulating their activity, stability, protein interaction, and subcellular localization. Further research is needed to fully understand the substrates of Slt2.
Article
Biochemistry & Molecular Biology
Elena Jimenez-Gutierrez, Teresa Fernandez-Acero, Esmeralda Alonso-Rodriguez, Maria Molina, Humberto Martin
Summary: The cell wall integrity pathway is a signaling pathway essential for yeast cell response to cell wall damage. By incorporating a genetic circuit as a signal amplifier, novel elements involved in this pathway can be identified. This study discovered various chemical agents, including neomycin, that can activate the pathway.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Biochemistry & Molecular Biology
Leire Torices, Janire Mingo, Isabel Rodriguez-Escudero, Teresa Fernandez-Acero, Sandra Luna, Caroline E. Nunes-Xavier, Jose Lopez, Fatima Mercadillo, Maria Curras, Miguel Urioste, Maria Molina, Victor J. Cid, Rafael Pulido
Summary: Heterozygous germline mutations in PTEN gene are associated with hamartomas, tumors, and neurodevelopmental disorders. PTEN acts as a phosphatase, counteracting the pro-oncogenic function of PI3K. This study characterized several PTEN variants found in PHTS patients and observed complex patterns of loss of function, altered localization, and altered cleavage by caspase-3.
EUROPEAN JOURNAL OF HUMAN GENETICS
(2023)
Article
Biochemistry & Molecular Biology
Ines G. de Oya, Elena Jimenez-Gutierrez, Helene Gaillard, Maria Molina, Humberto Martin, Ralf Erik Wellinger
Summary: This study reveals the importance of oxidative and cell wall stress signaling in the response to manganese stress in yeast. Yap1 and Slt2 are both protective factors against manganese toxicity and oxidative stress. In mutants impaired in manganese detoxification, Yap1 depletion enhances Slt2 activation, suggesting an interplay between different stress signaling pathways.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Multidisciplinary Sciences
Joana aniani Sa-Pessoa, Sara Lopez-Montesino, Kornelia Przybyszewska, Isabel Rodriguez-Escudero, Helina Marshall, Adelia Ova, Gunnar N. Schroeder, Peter Barabas, Maria Molina, Tim Curtis, Victor J. Cid, Jose A. Bengoechea
Summary: The trans-kingdom antimicrobial T6SS effector VgrG4 from Klebsiella pneumoniae can manipulate eukaryotic cells by altering the mitochondrial network. VgrG4 colocalizes with the endoplasmic reticulum protein mitofusin 2. VgrG4 induces the transfer of calcium from the endoplasmic reticulum to the mitochondria, activating the regulator of mitochondrial fission, Drp1, resulting in mitochondrial network fragmentation.
NATURE COMMUNICATIONS
(2023)
Article
Biochemistry & Molecular Biology
Marta Valenti, Maria Molina, Victor J. Cid
Summary: Gasdermin D (GSDMD) and mixed lineage kinase domain-like protein (MLKL) are pore-forming proteins involved in pyroptosis and necroptosis, respectively. By expressing GSDMD and its N-terminal domain (GSDMD(NT)) in yeast, they were found to inhibit yeast growth, induce mitochondrial fragmentation, and cause cell cycle arrest through TORC1 inhibition. They also disrupted endosomal and autophagic vesicular traffic. This study provides a humanized yeast platform for studying GSDMD and MLKL, which can be used for structure-function assays and drug discovery.
Article
Microbiology
Gema Gonzalez-Rubio, Humberto Martin, Maria Molina
Summary: This study demonstrates that the absence of Ptc1 protein phosphatase leads to the upregulation of the MAPK pathway and causes various functional defects in Saccharomyces cerevisiae. Additionally, it shows that the absence of Ptc1 also results in impaired mitochondrial inheritance and perturbed cell cycle progression, along with other physiological alterations including mitochondrial hyperpolarization and ROS accumulation.
MICROBIOLOGY SPECTRUM
(2023)
Editorial Material
Microbiology
Humberto Martin, Maria Molina