Article
Immunology
Laura E. Mendonca, Erwan Pernet, Nargis Khan, Joaquin Sanz, Eva Kaufmann, Jeffrey Downey, Alexandre Grant, Marianna Orlova, Erwin Schurr, Connie Krawczyk, Russell G. Jones, Luis B. Barreiro, Maziar Divangahi
Summary: Pulmonary macrophages have two distinct ontogenies: long-lived embryonically-seeded alveolar macrophages (AM) and bone marrow-derived macrophages (BMDM). After infection with a virulent strain of Mycobacterium tuberculosis, AM exhibit a unique transcriptomic signature characterized by metabolic reprogramming distinct from BMDM. AM failed to shift from oxidative phosphorylation to glycolysis and consequently were unable to control infection with an avirulent strain.
FRONTIERS IN IMMUNOLOGY
(2023)
Article
Immunology
Kaiqiang Qian, Lidong Shan, Shengwen Shang, Tianyue Li, Shuxin Wang, Meili Wei, Bikui Tang, Jun Xi
Summary: This study reveals the important role of manganese (Mn) in the host cell antiviral response pathway against Mycobacterium tuberculosis infection. Mn2+ increases the phosphorylation of STING and P65, as well as triggers the phosphorylation cascade of TNF signaling pathway proteins. This leads to the expression of inflammatory factors and a strong inflammatory response in macrophages, inhibiting the survival of M. tuberculosis.
INTERNATIONAL IMMUNOPHARMACOLOGY
(2022)
Article
Microbiology
Khushboo Borah Slater, Luana Moraes, Ye Xu, Daniel Kim
Summary: In this study, the authors used C-13 metabolic flux analysis to measure intracellular carbon metabolic fluxes in Mtb-infected macrophages and found that glycolytic fluxes were significantly increased and pentose phosphate pathway fluxes were reduced in infected macrophages.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Biology
Thomas Laval, Laura Pedro-Cos, Wladimir Malaga, Laure Guenin-Mace, Alexandre Pawlik, Veronique Mayau, Hanane Yahia-Cherbal, Oceane Delos, Wafa Frigui, Justine Bertrand-Michel, Christophe Guilhot, Caroline Demangel
Summary: The research revealed that Mtb has the ability to acquire specific fatty acids through Mce1 importer protein, while infected macrophages increase the synthesis of omega 6 PUFAs during the antiviral process, but this does not affect host cells or Mtb growth.
Article
Immunology
Ye-yu Li, Han-Mei Liu, Decheng Wang, Yan Lu, Cairong Ding, Li-Shuang Zhou, Xiang-Yang Wu, Zi-Wei Zhou, Shu-qin Xu, Chen Lin, Lian-Hua Qin, Yao Li, Jun Liu, Hai-Peng Liu, Lu Zhang
Summary: The study found that the AG of Mycobacterium can suppress host immune responses and enhance bacterial intracellular proliferation. The arabinose chains of AG have a greater impact on the virulence and pathogenicity of Mycobacterium.
FRONTIERS IN IMMUNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Jie Zhou, Fang Fang, Jinying Qi, Tengteng Li, Lin Zhang, Hui Liu, Jingzhu Lv, Tao Xu, Fengjiao Wu, Chuanwang Song, Wei Li, Xiaojing Wang, Xianyou Chang, Hongtao Wang, Ting Wang, Zhongqing Qian
Summary: Tuberculosis is a global threat to public health, and Nrf2 plays a key role in regulating protective immunity against mycobacterial infection. The expression of Nrf2 protein increases after M. tuberculosis infection, while the expression of Keap1 protein remains low. The activation of Nrf2 by SFN reduces inflammation, increases ROS levels, promotes autophagy, and enhances bacterial killing by macrophages.
FREE RADICAL BIOLOGY AND MEDICINE
(2022)
Article
Biochemistry & Molecular Biology
Fuzhen Zhang, Shanshan Yu, Qiyao Chai, Jing Wang, Tuoya Wu, Rongmei Liu, Yi Liu, Cui Hua Liu, Yu Pang
Summary: Research has shown that TB resisters exhibit higher immune responses and lower intracellular bacterial loads upon infection, largely dependent on the specific immune factor HDAC6.
Review
Microbiology
Jan D. Simper, Esteban Perez, Larry S. Schlesinger, Abul K. Azad
Summary: This review focuses on macrophage resistance and susceptibility factors in tuberculosis, covering cellular pathways, bioeffector proteins, cytokines, microbiological factors, and host genetic factors. Recent advances in understanding these factors will contribute to the development of host-directed therapeutics.
Review
Biology
Dominga Iacobazzi, Paolo Convertini, Simona Todisco, Anna Santarsiero, Vito Iacobazzi, Vittoria Infantino
Summary: NF-κB transcription factors play a pivotal role in regulating immune cell activation and have a complex interplay with energetic metabolism in innate immunity. New insights into NF-κB function and its crosstalk with immunometabolism contribute to a deeper understanding of molecular mechanisms and potential therapeutic targets for inflammatory/immune chronic diseases.
Article
Cell Biology
Nancy Gupta, Satish Vedi, Saurabh Garg, Eric Loo, Jie Li, Dennis Y. Kunimoto, Rakesh Kumar, Babita Agrawal
Summary: Tuberculosis, caused by Mycobacterium tuberculosis (Mtb), is a serious infectious disease. This study explored the use of a heat-killed non-pathogenic microbe, Caulobacter crescentus (HKCC), to induce innate immunity and limit Mtb infection. The combination of HKCC and a first-line drug isoniazid showed significant reduction in Mtb infection in mice, suggesting a potential new therapeutic strategy for tuberculosis in humans.
Article
Immunology
Jia-Yih Feng, Wei-Juin Su, Fan-Yi Chuang, Sheng-Wei Pan, Yi-Chen Yeh, Yung-Yang Lin, Nien-Jung Chen
Summary: The study demonstrates that TREM-1 enhances pro-inflammatory immune responses in mouse macrophages when stimulated with MTB-related proteins, and the gene expression of Trem-1 can be induced by MTB-related stimulation.
MICROBES AND INFECTION
(2021)
Review
Immunology
Poornima Sankar, Bibhuti Bhusan Mishra
Summary: Tuberculosis remains a global health challenge, causing a significant number of deaths every year. The interaction between Mycobacterium tuberculosis and innate immune cells, such as macrophages and dendritic cells, plays a crucial role in the host defense against the infection. However, our understanding of these interactions is still limited. This review focuses on exploring the early host-pathogen interactions and the contribution of various innate immune cells and mucosal barrier in tuberculosis immunity.
FRONTIERS IN IMMUNOLOGY
(2023)
Review
Oncology
Marine Monnier, Lea Paolini, Emeline Vinatier, Alberto Mantovani, Yves Delneste, Pascale Jeannin
Summary: This review article lists the biological differences between human and mouse macrophages and explains the different efficacy of anti-tumor strategies targeting tumor-associated macrophages (TAMs) between human and animal studies. The article points out that differences in the impact of survival and polarization factors, the cytokines produced and markers expressed by TAMs, as well as the limitations of extrapolations based on in vitro models of TAM-like generation need to be considered to improve the design and efficacy of anti-tumor drugs targeting TAMs.
JOURNAL FOR IMMUNOTHERAPY OF CANCER
(2022)
Article
Microbiology
Bevin C. C. English, Hannah P. P. Savage, Scott P. P. Mahan, Vladimir E. E. Diaz-Ochoa, Briana M. M. Young, Basel H. H. Abuaita, Gautam Sule, Jason S. S. Knight, Mary X. X. O'Riordan, Andreas J. J. Baeumler, Renee M. Tsolis
Summary: IRE1 alpha and its downstream transcription factor XBP1 enhance glycolysis in macrophages in response to bacterial infection. Different inflammatory stimuli activate IRE1 alpha through distinct mechanisms, and the activation of this pathway is not sufficient to increase glycolysis in macrophages. This study provides new insights into the regulation of macrophage metabolism and the role of IRE1 alpha and XBP1 in innate immunity.
Review
Immunology
Jiaqi Li, Yanjin Wang, Hao Deng, Su Li, Hua-Ji Qiu
Summary: Cellular metabolism plays a crucial role in regulating immune responses, including both innate and adaptive immunity. Viral infections induce metabolic reprogramming, which affects immune cell function, immune molecule expression, and cell fate. It is vital to explore effector molecules involved in immunometabolism, such as metabolites, metabolic enzymes, and other related molecules, for the development of antiviral drugs.
FRONTIERS IN IMMUNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Fay M. Allen, Ana S. H. Costa, Anja Gruszczyk, Georgina R. Bates, Hiran A. Prag, Efterpi Nikitopoulou, Carlo Viscomi, Christian Frezza, Andrew M. James, Michael P. Murphy
Summary: The study developed a rapid fractionation procedure to stabilize the distribution of metabolites between mitochondria and the cytosol. The procedure revealed the compartmentation of mitochondrial metabolites in vivo and allows for the assessment of metabolite distribution between the cytosol and mitochondria in various situations.
Article
Immunology
Susana Flores-Villalva, Aude Remot, Florence Carreras, Nathalie Winter, Stephen V. Gordon, Kieran G. Meade
Summary: Research has shown the beneficial role of vitamin D in health and resistance against infectious diseases, including tuberculosis. However, studies on bovines are limited. This study assesses the microbicidal activity and immunoregulatory effect of the vitamin D metabolite 1,25(OH)2D3 on bovine peripheral blood leukocytes (PBL) in response to Mycobacterium bovis BCG (BCG) infection.
VETERINARY IMMUNOLOGY AND IMMUNOPATHOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Amin Mottahedin, Hiran A. Prag, Andreas Dannhorn, Richard Mair, Christina Schmidt, Ming Yang, Annabel Sorby-Adams, Jordan J. Lee, Nils Burger, Duvaraka Kulaveerasingam, Margaret M. Huang, Stefano Pluchino, Luca Peruzzotti-Jametti, Richard Goodwin, Christian Frezza, Michael P. Murphy, Thomas Krieg
Summary: Current treatments for acute ischemic stroke can lead to significant ischemia-reperfusion (IR) injury. Accumulation of succinate during ischemia and its rapid oxidation upon reperfusion can drive IR injury. Targeting succinate metabolism to minimize IR injury shows promising results in experimental models, suggesting its potential as an adjunct therapy in ischemic stroke.
Meeting Abstract
Biochemistry & Molecular Biology
Patricia Sanchez-Perez, Ana Mata, May-Kristin Torp, Elia Lopez-Bernardo, Christina M. Heiestad, Jan M. Aronsen, Antonio Molina-Iracheta, Luis Jesus Jimenez-Borreguero, Pablo Garcia-Roves, Ana S. H. Costa, Christian Frezza, Michael P. Murphy, Kare-Olav Stenslokken, Susana Cadenas
FREE RADICAL BIOLOGY AND MEDICINE
(2023)
Article
Multidisciplinary Sciences
Alexander Hooftman, Christian G. Peace, Dylan G. Ryan, Emily A. Day, Ming Yang, Anne F. McGettrick, Maureen Yin, Erica N. Montano, Lihong Huo, Juliana E. Toller-Kawahisa, Vincent Zecchini, Tristram A. J. Ryan, Alfonso Bolado-Carrancio, Alva M. Casey, Hiran A. Prag, Ana S. H. Costa, Gabriela de los Santos, Mariko Ishimori, Daniel J. Wallace, Swamy Venuturupalli, Efterpi Nikitopoulou, Norma Frizzell, Cecilia Johansson, Alexander Von Kriegsheim, Michael P. Murphy, Caroline Jefferies, Christian Frezza, Luke A. J. O'Neill
Summary: Metabolic rewiring through an inflammatory aspartate-argininosuccinate shunt induces fumarate-mediated protein succination and inflammatory effects in macrophages. Inhibition of fumarate hydratase (FH) increases fumarate levels, suppresses mitochondrial respiration, and enhances interferon responses. FH inhibition may play a pathogenic role in systemic lupus erythematosus. These findings highlight the importance of FH in regulating macrophage functions and cytokine responses.
Article
Multidisciplinary Sciences
Vincent Zecchini, Vincent Paupe, Irene Herranz-Montoya, Joelle Janssen, Inge M. N. Wortel, Jordan L. Morris, Ashley Ferguson, Suvagata Roy Chowdury, Marc Segarra-Mondejar, Ana S. H. Costa, Goncalo C. Pereira, Laura Tronci, Timothy Young, Efterpi Nikitopoulou, Ming Yang, Dora Bihary, Federico Caicci, Shun Nagashima, Alyson Speed, Kalliopi Bokea, Zara Baig, Shamith Samarajiwa, Maxine Tran, Thomas Mitchell, Mark Johnson, Julien Prudent, Christian Frezza
Summary: The loss of FH in the kidney leads to early changes in mitochondrial morphology and the release of mtDNA into the cytosol, which activates the cGAS-STING-TBK1 pathway and induces an inflammatory response. This phenomenon is mediated by mitochondrial-derived vesicles and depends on SNX9. These findings demonstrate that increased levels of intracellular fumarate trigger a remodelling of the mitochondrial network and the generation of mitochondrial-derived vesicles, resulting in the release of mtDNA in the cytosol and the activation of the innate immune response.
Article
Agriculture, Dairy & Animal Science
Chloe Matthews, Aaron M. Walsh, Stephen V. Gordon, Bryan Markey, Paul D. Cotter, Jim O' Mahony
Summary: This study investigated the changes in the faecal microbiome of cattle exposed to MAP compared to a control group. Significant differences in taxonomic diversity and composition were observed at 3 months post inoculation, including changes in the relative abundance of Methanobrevibacter and Bifidobacterium genera.
Article
Genetics & Heredity
Elena Hailu, Daire Cantillon, Carlos Madrazo, Graham Rose, Paul R. Wheeler, Paul Golby, Bethlehem Adnew, Sebastien Gagneux, Abraham Aseffa, Stephen V. Gordon, Inaki Comas, Douglas B. Young, Simon J. Waddell, Gerald Larrouy-Maumus, Stefan Berg
Summary: Lineage 7 (L7) emerged in the phylogeny of the Mycobacterium tuberculosis complex (MTBC) subsequent to the branching of 'ancient' lineage 1 and prior to the Eurasian dispersal of 'modern' lineages 2, 3 and 4. The restricted distribution of L7, mainly confined to the Ethiopian population, may be explained by lineage-specific mutations in biosynthesis pathways of cell wall lipids, including deficiency of methoxy-mycolic acids. The loss of these mycolic acid moieties alters the cell structure, colony morphology, and biofilm formation, potentially impacting the host-pathogen interaction and contributing to the limited geographical spread of L7.
MICROBIAL GENOMICS
(2023)
Article
Microbiology
Jeewan Thapa, Joseph Yamweka Chizimu, Soyoka Kitamura, Mwangala Lonah Akapelwa, Pondpan Suwanthada, Nami Miura, Jirachaya Toyting, Tomoyasu Nishimura, Naoki Hasegawa, Yukiko Nishiuchi, Stephen V. Gordon, Chie Nakajima, Yasuhiko Suzuki
Summary: This study found that amino acid substitutions in the gyrA of M. avium contribute to fluoroquinolone resistance, shedding light on the role of these substitutions in the development of resistance.
MICROBIOLOGY SPECTRUM
(2023)
Article
Biochemistry & Molecular Biology
Almudena Serrano-Benitez, Sophie E. Wells, Lylah Drummond-Clarke, Lilian C. Russo, John Christopher Thomas, Giovanna A. Leal, Mark Farrow, James Michael Edgerton, Shankar Balasubramanian, Ming Yang, Christian Frezza, Amit Gautam, Jan Brazina, Kamila Burdova, Nicolas C. Hoch, Stephen P. Jackson, Keith W. Caldecott
Summary: DNA single-strand breaks (SSBs) play a role in disrupting DNA replication and causing chromosome breakage. This study investigates whether SSBs induce chromosome breakage when located behind or ahead of replication forks, and finds that only SSBs ahead of replication forks trigger fork collapse and chromosome breakage. Furthermore, the study shows that CldU, a thymidine analogue, is cytotoxic to cells lacking SSB repair mechanisms and its incorporation in template DNA is particularly harmful during the following cell cycle. Additionally, BRCA-defective cells are highly sensitive to CldU, suggesting its potential clinical utility.
Article
Biochemistry & Molecular Biology
Patricia Sanchez-Perez, Ana Mata, May-Kristin Torp, Elia Lopez-Bernardo, Christina M. Heiestad, Jan Magnus Aronsen, Antonio Molina-Iracheta, Luis J. Jimenez-Borreguero, Pablo Garcia-Roves, Ana S. H. Costa, Christian Frezza, Michael P. Murphy, Kare-Olav Stenslokken, Susana Cadenas
Summary: Myocardial ischemia-reperfusion injury can lead to cardiomyocyte dysfunction, and mitochondria play a critical role in cardiomyocyte recovery. This study investigated the effects of UCP3 deficiency on functional, structural, and metabolic cardiac remodeling after IR. The results showed that UCP3 deficiency increases myocardial damage by promoting superoxide generation and mitochondrial structural changes.
FREE RADICAL BIOLOGY AND MEDICINE
(2023)
Article
Cell Biology
Connor Rogerson, Marco Sciacovelli, Lucas A. Maddalena, Andromachi Pouikli, Marc Segarra-Mondejar, Lorea Valcarcel-Jimenez, Christina Schmidt, Ming Yang, Elena Ivanova, Joshua Kent, Ariane Mora, Danya Cheeseman, Jason S. Carroll, Gavin Kelsey, Christian Frezza
Summary: Hereditary leiomyomatosis and renal cell cancer (HLRCC) is a cancer syndrome caused by inactivating germ-line mutations in fumarate hydratase (FH) and subsequent accumulation of fumarate. Fumarate accumulation leads to profound epigenetic changes and the activation of an antioxidant response via nuclear translocation of the transcription factor NRF2. The identification of FOXA2 as an antioxidant regulator provides additional insights into the molecular mechanisms behind cell responses to fumarate accumulation and potentially provides further avenues for therapeutic intervention for HLRCC.
Editorial Material
Oncology
Christian G. Peace, Alexander Hooftman, Dylan G. Ryan
CLINICAL AND TRANSLATIONAL MEDICINE
(2023)
Article
Oncology
Maria Fala, Susana Ros, Ashley Sawle, Jyotsna U. Rao, Anastasia Tsyben, Laura Tronci, Christian Frezza, Richard Mair, Kevin M. Brindle
Summary: BCAT1 expression in glioblastoma varies widely, and its role in cell proliferation and invasion depends on the tumor subtype.
NEURO-ONCOLOGY ADVANCES
(2023)