4.6 Article

PhoP: A Missing Piece in the Intricate Puzzle of Mycobacterium tuberculosis Virulence

期刊

PLOS ONE
卷 3, 期 10, 页码 -

出版社

PUBLIC LIBRARY SCIENCE
DOI: 10.1371/journal.pone.0003496

关键词

-

资金

  1. Spanish MEC [BIO2005-07949-C02-01]
  2. EU FP6 TB-VAC [LSHP-CT203-503367]

向作者/读者索取更多资源

Inactivation of the transcriptional regulator PhoP results in Mycobacterium tuberculosis attenuation. Preclinical testing has shown that attenuated M. tuberculosis phoP mutants hold promise as safe and effective live vaccine candidates. We focused this study to decipher the virulence networks regulated by PhoP. A combined transcriptomic and proteomic analysis revealed that PhoP controls a variety of functions including: hypoxia response through DosR crosstalking, respiratory metabolism, secretion of the major T-cell antigen ESAT-6, stress response, synthesis of pathogenic lipids and the M. tuberculosis persistence through transcriptional regulation of the enzyme isocitrate lyase. We also demonstrate that the M. tuberculosis phoP mutant SO2 exhibits an antigenic capacity similar to that of the BCG vaccine. Finally, we provide evidence that the SO2 mutant persists better in mouse organs than BCG. Altogether, these findings indicate that PhoP orchestrates a variety of functions implicated in M. tuberculosis virulence and persistence, making phoP mutants promising vaccine candidates.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.6
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

Article Cell Biology

Septins promote caspase activity and coordinate mitochondrial apoptosis

Hoan Van Ngo, Stevens Robertin, Dominik Brokatzky, Magdalena K. Bielecka, Damian Lobato-Marquez, Vincenzo Torraca, Serge Mostowy

Summary: Apoptosis is a crucial mechanism that regulates cell death, and septins are important components that promote mitochondrial apoptosis and combat bacterial infection.

CYTOSKELETON (2023)

Article Oncology

BCG-activation of leukocytes is sufficient for the generation of donor-independent innate anti-tumor NK and γδ T-cells that can be further expanded in vitro

Gloria Esteso, Maria Jose Felgueres, Alvaro F. Garcia-Jimenez, Christina Reyburn-Vales, Alberto Benguria, Enrique Vazquez, Hugh T. Reyburn, Nacho Aguilo, Carlos Martin, Eugenia Puentes, Ingrid Murillo, Esteban Rodriguez, Mar Vales-Gomez

Summary: In this study, it was found that stimulation with iBCG can expand oligoclonal gamma delta T-cells and anti-tumor NK cells in human peripheral blood mononuclear cells. These cells exhibited cytotoxicity and can inhibit the growth of bladder cancer. The expansion of these cells in vitro may provide a new approach for cell-based immunotherapy.

ONCOIMMUNOLOGY (2023)

Article Cell Biology

Zebrafish null mutants of Sept6 and Sept15 are viable but more susceptible to Shigella infection

Vincenzo Torraca, Magdalena K. Bielecka, Margarida C. Gomes, Dominik Brokatzky, Elisabeth M. Busch-Nentwich, Serge Mostowy

Summary: This study characterized null mutants for zebrafish Sept6 and Sept15 and found that they both play important roles in zebrafish development and host defence against Shigella infection. The mutation of Sept6 and Sept15 did not significantly affect the expression of other zebrafish septin genes.

CYTOSKELETON (2023)

Editorial Material Cell Biology

Introduction to the Special Issue of Cytoskeleton on the molecular and cell biology of septins

Serge Mostowy, Aurelie Bertin, Helge Ewers

CYTOSKELETON (2023)

Article Cell Biology

An automated microscopy workflow to study Shigella-neutrophil interactions and antibiotic efficacy in vivo

Arthu Lensen, Margarida C. Gomes, Ana Teresa Lopez-Jimenez, Serge Mostowy

Summary: Shigella, a gram-negative bacterial pathogen, is responsible for bacillary dysentery. The lack of a licensed vaccine and the emergence of antibiotic resistance have made Shigella a priority pathogen requiring urgent attention. In this study, a Shigella-zebrafish infection model and high-content microscopy were used to develop an automated microscopy workflow to study bacterial and neutrophil interactions in vivo. Antibiotics were found to reduce bacterial burden but not neutrophil recruitment, and nalidixic acid was shown to work with leukocytes to control Shigella infection and restrict its dissemination. The researchers propose that their automated microscopy workflow can be useful in innovating infection control treatments in humans.

DISEASE MODELS & MECHANISMS (2023)

Article Cell Biology

Septins and K63 ubiquitin chains are present in separate bacterial microdomains during autophagy of entrapped Shigella

Damian Lobato-Marquez, Jose Javier Conesa, Ana Teresa Lopez-Jimenez, Michael E. Divine, Jonathan N. Pruneda, Serge Mostowy

Summary: During Shigella invasion of host cells, it escapes to the cytosol and uses actin polymerization to spread between cells. Host cells employ cell-autonomous immune responses, including autophagy and septin cage entrapment, to restrict this spread. This study used cryo-SXT and other imaging techniques to investigate the interaction between septins, autophagy, and Shigella. The findings provide insights into the targeting of septin-caged Shigella for autophagy and the interaction between autophagy and the cytoskeleton.

JOURNAL OF CELL SCIENCE (2023)

Article Microbiology

Acquisition of a large virulence plasmid (pINV) promoted temperature-dependent virulence and global dispersal of O96:H19 enteroinvasive Escherichia coli

Sydney L. L. Miles, Vincenzo Torraca, Zoe A. A. Dyson, Ana Teresa Lopez-Jimenez, Ebenezer Foster-Nyarko, Damian Lobato-Marquez, Claire Jenkins, Kathryn E. E. Holt, Serge Mostowy

Summary: By analyzing the genetic sequences of ST99 E. coli, we found that there are two subsets of strains, one with a virulence plasmid pINV and one without. The results of zebrafish infection experiments show that the virulence of ST99 E. coli is temperature-dependent. Furthermore, it was discovered that ST99 strains may have been virulent before the acquisition of pINV, indicating the importance of pINV in the dissemination of ST99 E. coli.
Article Biochemical Research Methods

P1 Bacteriophage-Enabled Delivery of CRISPR-Cas9 Antimicrobial Activity Against Shigella flexneri

Yang W. Huan, Vincenzo Torraca, Russell Brown, Jidapha Fa-arun, Sydney L. Miles, Diego A. Oyarzun, Serge Mostowy, Baojun Wang

Summary: The discovery of CRISPR-Cas9 provides opportunities to selectively kill specific bacteria, but its delivery into bacterial cells is inefficient. In this study, the P1-derived phagemid is used to efficiently deliver the CRISPR-Cas9 chromosomal-targeting system into Escherichia coli and Shigella flexneri, achieving DNA sequence-specific killing of targeted bacterial cells. The P1 phage particles can also deliver cas9 phagemids into S. flexneri in vivo, reducing bacterial load and promoting host survival. This study demonstrates the potential of combining P1 phage-based delivery with the CRISPR system for efficient clearance of bacterial infection.

ACS SYNTHETIC BIOLOGY (2023)

Article Immunology

Shigella Serotypes Associated With Carriage in Humans Establish Persistent Infection in Zebrafish

Vincenzo Torraca, Dominik Brokatzky, Sydney L. Miles, Charlotte E. Chong, P. Malaka De Silva, Stephen Baker, Claire Jenkins, Kathryn E. Holt, Kate S. Baker, Serge Mostowy

Summary: Shigella, including specific serotypes, can establish persistent infection in the zebrafish model. The O-antigen plays a crucial role in this process, and the serotype-associated effects observed in humans are also observed in zebrafish.

JOURNAL OF INFECTIOUS DISEASES (2023)

Article Multidisciplinary Sciences

Intravenous administration of BCG in mice promotes natural killer and T cell-mediated antitumor immunity in the lung

Eduardo Moreo, Aitor Jarit-Cabanillas, Inaki Robles-Vera, Santiago Uranga, Claudia Guerrero, Ana Belen Gomez, Pablo Mata-Martinez, Luna Minute, Miguel Araujo-Voces, Maria Jose Felgueres, Gloria Esteso, Iratxe Uranga-Murillo, Maykel Arias, Julian Pardo, Carlos Martin, Mar Vales-Gomez, Carlos del Fresno, David Sancho, Nacho Aguilo

Summary: Intravenous administration of BCG shows potential in the treatment of lung tumors, reducing tumor growth and enhancing immune responses. It also enhances the efficacy of immune checkpoint blockade.

NATURE COMMUNICATIONS (2023)

Article Microbiology

Natural mutations in the sensor kinase of the PhoPR two-component regulatory system modulate virulence of ancestor-like tuberculosis bacilli

Wladimir Malaga, Delphine Payros, Eva Meunier, Wafa Frigui, Fadel Sayes, Alexandre Pawlik, Mickael Orgeur, Celine Berrone, Flavie Moreau, Serge Mazeres, Jesus Gonzalo-Asensio, David Rengel, Carlos Martin, Catherine Astarie-Dequeker, Lionel Mourey, Roland Brosch, Christophe Guilhot

Summary: In this study, the authors found that the sensor protein PhoPR in Mycobacterium canettii strains has amino acid substitutions that affect its activity compared to Mycobacterium tuberculosis. These mutations impact the production and secretion of virulence factors, enhancing the capacity of the strains to colonize and transmit within the host. Therefore, these findings support the hypothesis that variants of the PhoPR regulatory system are key evolutionary adaptations for enhancing the epidemic capacity of tuberculosis.

PLOS PATHOGENS (2023)

Article Biochemistry & Molecular Biology

NAC Pre-Administration Prevents Cardiac Mitochondrial Bioenergetics, Dynamics, Biogenesis, and Redox Alteration in Folic Acid-AKI-Induced Cardio-Renal Syndrome Type 3

Belen Cuevas-Lopez, Edgar Ignacio Romero-Ramirez, Fernando E. Garcia-Arroyo, Edilia Tapia, Juan Carlos Leon-Contreras, Alejandro Silva-Palacios, Francisco-Javier Roldan, Omar Noel Medina Campos, Luz Hernandez-Esquivel, Alvaro Marin-Hernandez, Jose Guillermo Gonzaga-Sanchez, Rogelio Hernandez-Pando, Jose Pedraza-Chaverri, Laura Gabriela Sanchez-Lozada, Omar Emiliano Aparicio-Trejo

Summary: The incidence of kidney disease is increasing globally, and acute kidney injury (AKI) can contribute to the development of cardio-renal syndrome (CRS) type 3. However, the mechanism behind CRS development is not fully understood. This study aimed to investigate the molecular mechanisms associated with cardiac mitochondrial impairment and its role in CRS development. The findings suggest that mitochondrial bioenergetics impairment plays a crucial role in heart damage, and the preservation of heart mitochondrial function during AKI could be a valuable strategy to prevent CRS type 3.

ANTIOXIDANTS (2023)

Article Biochemistry & Molecular Biology

Ex Vivo and In Silico Approaches of Tracheal Relaxation through Calcium Channel Blockade of 6-Aminoflavone and Its Toxicological Studies in Murine Models

Angelica Flores-Flores, Samuel Estrada-Soto, Cesar Millan-Pacheco, Blanca Bazan-Perkins, Rogelio Hernandez-Pando, Maximiliano Ibarra-Barajas, Rafael Villalobos-Molina

Summary: Asthma is a condition where the airways become inflamed and narrowed, causing symptoms such as shortness of breath and wheezing. It was found that 6-aminoflavone (6-NH2F) can effectively relax the airways and has low toxicity in animal models, potentially through calcium channel blockade.

BIOMEDICINES (2023)

Review Chemistry, Medicinal

The Use of Viral Vectors for Gene Therapy and Vaccination in Tuberculosis

Dulce Mata-Espinosa, Jacqueline V. Lara-Espinosa, Jorge Barrios-Payan, Rogelio Hernandez-Pando

Summary: This study reviews the model strategies for gene therapy and new vaccines in the treatment of tuberculosis, suggesting that it is a potential alternative therapy for active TB, as well as for the prevention and treatment of latent TB reactivation and transmission of Mtb.

PHARMACEUTICALS (2023)

Article Hematology

Proximity proteomics identifies septins and PAK2 as decisive regulators of actomyosin-mediated expulsion of von Willebrand factor

Sammy El-Mansi, Christopher L. Robinson, Katja B. Kostelnik, Jessica J. McCormack, Tom P. Mitchell, Damian Lobato-Marquez, Vinothini Rajeeve, Pedro Cutillas, Daniel F. Cutler, Serge Mostowy, Thomas D. Nightingale

Summary: In response to tissue injury, the ultra-large glycoprotein von Willebrand factor (VWF) is released from endothelial storage organelles into the blood vasculature, leading to platelet recruitment. Endothelial cells have developed mechanisms, such as an actomyosin ring, to overcome the challenge of releasing VWF. Inhibiting the formation or function of these structures could be a potential therapeutic target for thrombotic diseases.
暂无数据