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Ling X, Liu X, Wang K, Guo M, Ou Y, Li D, Xiang Y, Zheng J, Hu L, Zhang H, Li W. Lsr2 acts as a cyclic di-GMP receptor that promotes keto-mycolic acid synthesis and biofilm formation in mycobacteria. Nat Commun 2024; 15:695. [PMID: 38267428 PMCID: PMC10808224 DOI: 10.1038/s41467-024-44774-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 01/03/2024] [Indexed: 01/26/2024] Open
Abstract
Cyclic di-GMP (c-di-GMP) is a second messenger that promotes biofilm formation in several bacterial species, but the mechanisms are often unclear. Here, we report that c-di-GMP promotes biofilm formation in mycobacteria in a manner dependent on the nucleoid-associated protein Lsr2. We show that c-di-GMP specifically binds to Lsr2 at a ratio of 1:1. Lsr2 upregulates the expression of HadD, a (3R)-hydroxyacyl-ACP dehydratase, thus promoting the synthesis of keto-mycolic acid and biofilm formation. Thus, Lsr2 acts as a c-di-GMP receptor that links the second messenger's function to lipid synthesis and biofilm formation in mycobacteria.
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Affiliation(s)
- Xiaocui Ling
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, 530004, China
| | - Xiao Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, 530004, China
| | - Kun Wang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, 530004, China
| | - Minhao Guo
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, 530004, China
| | - Yanzhe Ou
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, 530004, China
| | - Danting Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, 530004, China
| | - Yulin Xiang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, 530004, China
| | - Jiachen Zheng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, 530004, China
| | - Lihua Hu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, 530004, China
| | - Hongyun Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, 530004, China
| | - Weihui Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, College of Life Science and Technology, Guangxi University, Nanning, 530004, China.
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2
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Aceves-Sánchez MDJ, Barrios-Payán JA, Segura-Cerda CA, Flores-Valdez MA, Mata-Espinosa D, Pedroza-Roldán C, Yadav R, Saini DK, de la Cruz MA, Ares MA, Bielefeldt-Ohmann H, Baay-Guzmán G, Vergne I, Velázquez-Fernández JB, Barba León J, Hernández-Pando R. BCG∆BCG1419c and BCG differ in induction of autophagy, c-di-GMP content, proteome, and progression of lung pathology in Mycobacterium tuberculosis HN878-infected male BALB/c mice. Vaccine 2023; 41:3824-3835. [PMID: 37164819 DOI: 10.1016/j.vaccine.2023.04.065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 03/20/2023] [Accepted: 04/24/2023] [Indexed: 05/12/2023]
Abstract
The efficacy of BCG vaccines against Mycobacterium tuberculosis (Mtb) strains of lineage 2 (Beijing) in preclinical models and humans has been questioned. We have developed BCG∆BCG1419c, by deletion of BCG1419c in BCG Pasteur, which improved control of tuberculosis (TB) in preclinical models. Here, we compared the capacity of BCG and BCG∆BCG1419c to induce autophagy in murine macrophages, modify c-di-GMP content and transcript levels of BCG1416c, encoding the enzyme responsible for c-di-GMP synthesis/degradation, and of BCG1419c, encoding the phosphodiesterase involved in c-di-GMP degradation. Furthermore, we evaluated proteomic differences in vitro and compared protection against TB produced by a low dose of the HN878-Beijing strain at 3- and 6-months post-infection. We found that BCG∆BCG1419c induced more autophagy and produced different levels of c-di-GMP as well as different transcription of BCG1416c with no expression of BCG1419c. BCG∆BCG1419c differentially produced several proteins, including some involved in interaction with host cells. Vaccination with either BCG strain led to control of bacillary burden in lungs and spleen at 3- but not 6-months post-infection, whereas it reduced pneumonic areas compared with unvaccinated controls at 6 months post-infection. Vaccination with BCG∆BCG1419c delayed progression of lung necrosis as this was observed only at 6 months post-infection. Taken together, compared with BCG, BCG∆BCG1419c increased autophagy, presented different levels of c-di-GMP and transcription of BCG1416c in vitro in a growth-phase dependent manner, modified its proteome and delayed progression of lung pathology produced by a highly virulent Beijing strain.
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Affiliation(s)
- Michel de Jesús Aceves-Sánchez
- Biotecnología Médica y Farmacéutica, Centro de Investigación y Asistencia en Tecnología y diseño del Estado de Jalisco, Av. Normalistas 800, Col. Colinas de la Normal, Guadalajara, Jalisco 44270, México
| | - Jorge Alberto Barrios-Payán
- Laboratorio de Patología Experimental. Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Vasco de Quiroga 15, Belisario Domínguez sección 16, Tlalpan, Ciudad de México, Mexico
| | - Cristian Alfredo Segura-Cerda
- Biotecnología Médica y Farmacéutica, Centro de Investigación y Asistencia en Tecnología y diseño del Estado de Jalisco, Av. Normalistas 800, Col. Colinas de la Normal, Guadalajara, Jalisco 44270, México
| | - Mario Alberto Flores-Valdez
- Biotecnología Médica y Farmacéutica, Centro de Investigación y Asistencia en Tecnología y diseño del Estado de Jalisco, Av. Normalistas 800, Col. Colinas de la Normal, Guadalajara, Jalisco 44270, México.
| | - Dulce Mata-Espinosa
- Laboratorio de Patología Experimental. Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Vasco de Quiroga 15, Belisario Domínguez sección 16, Tlalpan, Ciudad de México, Mexico
| | - César Pedroza-Roldán
- Departamento de Medicina Veterinaria, Centro Universitario de Ciencias Biológicas y Agropecuarias, Universidad de Guadalajara, Zapopan, Mexico
| | - Rahul Yadav
- Department of Developmental Biology and Genetics, Indian Institute of Science, Bangalore 560012, India
| | - Deepak Kumar Saini
- Department of Developmental Biology and Genetics, Indian Institute of Science, Bangalore 560012, India
| | - Miguel Angel de la Cruz
- Unidad de Investigación Médica en Enfermedades Infecciosas y Parasitarias, Centro Médico Nacional (CMN) Siglo XXI, Instituto Mexicano de Seguro Social (IMSS), Ciudad de México, Mexico
| | - Miguel A Ares
- Unidad de Investigación Médica en Enfermedades Infecciosas y Parasitarias, Centro Médico Nacional (CMN) Siglo XXI, Instituto Mexicano de Seguro Social (IMSS), Ciudad de México, Mexico
| | - Helle Bielefeldt-Ohmann
- School of Chemistry and Molecular Biosciences, University of Queensland St. Lucia Campus, St Lucia, QLD 4072, Australia
| | - Guillermina Baay-Guzmán
- Unidad de Investigación de Enfermedades Hematooncológicas. Hospital Infantil de México Federico Gómez, Del. Cuauhtémoc, Ciudad de México, Mexico
| | - Isabelle Vergne
- Institut de Pharmacologie et de Biologie Structurale, Université de Toulouse, CNRS, Université Paul Sabatier, 31077 Toulouse, France
| | | | - Jeannette Barba León
- Departamento de Salud Pública, Centro Universitario de Ciencias Biológicas y Agropecuarias, Universidad de Guadalajara, Km. 15.5 Carretera a Nogales, Zapopan, Jalisco 45110, Mexico
| | - Rogelio Hernández-Pando
- Laboratorio de Patología Experimental. Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Vasco de Quiroga 15, Belisario Domínguez sección 16, Tlalpan, Ciudad de México, Mexico.
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3
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Badhwar P, Ahmad I, Sharma R, Taneja B. Structural investigation and gene deletion studies of mycobacterial oligoribonuclease reveal modulation of c-di-GMP-mediated phenotypes. Int J Biol Macromol 2022; 223:161-172. [PMID: 36356862 DOI: 10.1016/j.ijbiomac.2022.11.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 10/26/2022] [Accepted: 11/01/2022] [Indexed: 11/09/2022]
Abstract
Cyclic-di-GMP (c-di-GMP) is a ubiquitous bacterial second messenger required for normal physiology as well as survival under hypoxic and reductive stress conditions of mycobacterial cells. Complete degradation of c-di-GMP is necessary for signal termination and maintaining its homeostasis inside the cells. Homeostasis of c-di-GMP in mycobacteria is brought about by the bifunctional diguanylate cyclase (DGC) that synthesizes c-di-GMP from two molecules of GTP and also catalyses the asymmetric cleavage of c-di-GMP to linear pGpG through its phosphodiesterase activity. However, the mycobacterial enzyme for the last step of degradation from pGpG to GMP has not been characterized thus far. Here, we present the identification of oligoribonuclease (Orn) as the most likely phosphodiesterase to degrade pGpG to GMP through AlphaFold-empowered structural homology that exhibited in vitro phosphodiesterase activity on pGpG substrates. In order to understand the physiological role of Orn in mycobacteria, we created a deletion mutant of orn in M. smegmatis and analysed the phenotypes that are associated with c-di-GMP signaling. We find that orn plays important roles in vivo and is required not only for proper growth of M. smegmatis in normal and stress conditions but also for biofilm formation.
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Affiliation(s)
- Pooja Badhwar
- CSIR-Institute of Genomics and Integrative Biology (CSIR-IGIB), New Delhi 110025, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Iftekhar Ahmad
- CSIR-Institute of Genomics and Integrative Biology (CSIR-IGIB), New Delhi 110025, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Rakesh Sharma
- CSIR-Institute of Genomics and Integrative Biology (CSIR-IGIB), New Delhi 110025, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Bhupesh Taneja
- CSIR-Institute of Genomics and Integrative Biology (CSIR-IGIB), New Delhi 110025, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
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4
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Lin X, Jia W, Feng G, Su Y, Kang Y, Zhang C, Liu W, Lu Z, Xue D. The role of APTX4870 peptide in reducing cellular inflammatory responses by inhibiting Mycobacterium tuberculosis-derived mycolic acid-induced cytotoxicity. Front Microbiol 2022; 13:993897. [DOI: 10.3389/fmicb.2022.993897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 10/07/2022] [Indexed: 11/13/2022] Open
Abstract
Tuberculosis is a serious zoonotic disease caused by Mycobacterium tuberculosis (M.tb) and the M.tb complex. Mycolic acid is an extracellular carbohydrate polymer produced, secreted, and accumulated outside the cells of various Mycobacterium tuberculosis strains. Mycolic acid produced by Mycobacterium plays an important role in infection. However, there have been few reports on drugs that inhibit mycolic acid-induced cytotoxicity. The purpose of this study was to investigate the role of the panned peptide in Mycobacterium-derived mycolic acid (M.tb-MA)-induced cell injury. The heptapeptide (APTX4870) was isolated from various phage libraries using phage display (Ph.D-7, Ph.D-12, and Ph.D-C7C). The efficacy of APTX4870 against mycolic acid was demonstrated by evaluating clinical samples and conducting in vitro and Vivo. APTX4870 inhibited apoptosis, increased autophagy to decrease inflammation, and reduced M.tb-MA-induced lung damage. These findings suggest that this heptapeptide, which selectively targets M.tb-MA, might be exploited as a potential novel M.tb therapeutic treatment.
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5
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Phosphoproteomics of Mycobacterium-host interaction and inspirations for novel measures against tuberculosis. Cell Signal 2022; 91:110238. [PMID: 34986388 DOI: 10.1016/j.cellsig.2021.110238] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 12/19/2021] [Accepted: 12/29/2021] [Indexed: 11/23/2022]
Abstract
Tuberculosis caused by Mycobacterium tuberculosis (Mtb) remains a tremendous global public health concern. Deciphering the biology of the pathogen and its interaction with host can inspire new measures against tuberculosis. Phosphorylation plays versatile and important role in the pathogen and host physiology, such as virulence, signaling and immune response. Proteome-wide phosphorylation of Mtb and its infected host cells, namely phosphoproteome, can inform the post-translational modification of the interaction network between the pathogen and the host, key targets for novel antibiotics. We summarized the phosphoproteome of Mtb, as well as the host, focusing on potential application for new measures against tuberculosis.
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Medina-Alarcón KP, Tobias da Silva IP, Ferin GG, Pereira-da-Silva MA, Marcos CM, Dos Santos MB, Regasini LO, Chorilli M, Mendes-Giannini MJS, Pavan FR, Fusco-Almeida AM. Mycobacterium tuberculosis and Paracoccidioides brasiliensis Formation and Treatment of Mixed Biofilm In Vitro. Front Cell Infect Microbiol 2021; 11:681131. [PMID: 34790584 PMCID: PMC8591247 DOI: 10.3389/fcimb.2021.681131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Accepted: 09/16/2021] [Indexed: 12/02/2022] Open
Abstract
Co-infection of Mycobacterium tuberculosis and Paracoccidioides brasiliensis, present in 20% in Latin America, is a public health problem due to a lack of adequate diagnosis. These microorganisms are capable of forming biofilms, mainly in immunocompromised patients, which can lead to death due to the lack of effective treatment for both diseases. The present research aims to show for the first time the formation of mixed biofilms of M. tuberculosis and P. brasiliensis (Pb18) in vitro, as well as to evaluate the action of 3’hydroxychalcone (3’chalc) -loaded nanoemulsion (NE) (NE3’chalc) against monospecies and mixed biofilms, the formation of mixed biofilms of M. tuberculosis H37Rv (ATCC 27294), 40Rv (clinical strains) and P. brasiliensis (Pb18) (ATCC 32069), and the first condition of formation (H37Rv +Pb18) and (40Rv + Pb18) and second condition of formation (Pb18 + H37Rv) with 45 days of total formation time under both conditions. The results of mixed biofilms (H37Rv + Pb18) and (40Rv + Pb18), showed an organized network of M. tuberculosis bacilli in which P. brasiliensis yeasts are connected with a highly extracellular polysaccharide matrix. The (Pb18 + H37Rv) showed a dense biofilm with an apparent predominance of P. brasiliensis and fragments of M. tuberculosis. PCR assays confirmed the presence of the microorganisms involved in this formation. The characterization of NE and NE3’chalc displayed sizes from 145.00 ± 1.05 and 151.25 ± 0.60, a polydispersity index (PDI) from 0.20± 0.01 to 0.16± 0.01, and zeta potential -58.20 ± 0.92 mV and -56.10 ± 0.71 mV, respectively. The atomic force microscopy (AFM) results showed lamellar structures characteristic of NE. The minimum inhibitory concentration (MIC) values of 3’hidroxychalcone (3’chalc) range from 0.97- 7.8 µg/mL and NE3’chalc from 0.24 - 3.9 µg/mL improved the antibacterial activity when compared with 3’chalc-free, no cytotoxicity. Antibiofilm assays proved the efficacy of 3’chalc-free incorporation in NE. These findings contribute to a greater understanding of the formation of M. tuberculosis and P. brasiliensis in the mixed biofilm. In addition, the findings present a new possible NE3’chalc treatment alternative for the mixed biofilms of these microorganisms, with a high degree of relevance due to the lack of other treatments for these comorbidities.
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Affiliation(s)
- Kaila Petronila Medina-Alarcón
- School of Pharmaceutical Sciences, Department of Clinical Analysis, Universidade Estadual Paulista (UNESP), Araraquara, Brazil
| | - Iara Pengo Tobias da Silva
- School of Pharmaceutical Sciences, Department of Clinical Analysis, Universidade Estadual Paulista (UNESP), Araraquara, Brazil
| | - Giovana Garcia Ferin
- School of Pharmaceutical Sciences, Department of Clinical Analysis, Universidade Estadual Paulista (UNESP), Araraquara, Brazil
| | - Marcelo A Pereira-da-Silva
- Institute of Physics of Sao Carlos (IFSC)-University of Sao Paulo (USP) IFSC/USP, Sao Carlos, Brazil.,Exact Sciences and Engineering, Paulista Central University Center (UNICEP), Säo Carlos, Brazil
| | - Caroline Maria Marcos
- School of Pharmaceutical Sciences, Department of Clinical Analysis, Universidade Estadual Paulista (UNESP), Araraquara, Brazil
| | - Mariana Bastos Dos Santos
- Department of Chemistry and Environmental Sciences, Institute of Biosciences, Humanities and Exact Sciences, Universidade Estadual Paulista, São José do Rio Preto, Brazil
| | - Luis Octávio Regasini
- Department of Chemistry and Environmental Sciences, Institute of Biosciences, Humanities and Exact Sciences, Universidade Estadual Paulista, São José do Rio Preto, Brazil
| | - Marlus Chorilli
- Department of Drug and Medicines, School of Pharmaceutical Sciences, Universidade Estadual Paulista, Araraquara, Brazil
| | - Maria José S Mendes-Giannini
- School of Pharmaceutical Sciences, Department of Clinical Analysis, Universidade Estadual Paulista (UNESP), Araraquara, Brazil
| | - Fernando Rogerio Pavan
- Department of Biological, School of Pharmaceutical Sciences, Universidade Estadual Paulista, Araraquara, Brazil
| | - Ana Marisa Fusco-Almeida
- School of Pharmaceutical Sciences, Department of Clinical Analysis, Universidade Estadual Paulista (UNESP), Araraquara, Brazil
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7
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Vaccination with BCGΔBCG1419c protects against pulmonary and extrapulmonary TB and is safer than BCG. Sci Rep 2021; 11:12417. [PMID: 34127755 PMCID: PMC8203684 DOI: 10.1038/s41598-021-91993-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 06/03/2021] [Indexed: 02/07/2023] Open
Abstract
A single intradermal vaccination with an antibiotic-less version of BCGΔBCG1419c given to guinea pigs conferred a significant improvement in outcome following a low dose aerosol exposure to M. tuberculosis compared to that provided by a single dose of BCG Pasteur. BCGΔBCG1419c was more attenuated than BCG in murine macrophages, athymic, BALB/c, and C57BL/6 mice. In guinea pigs, BCGΔBCG1419c was at least as attenuated as BCG and induced similar dermal reactivity to that of BCG. Vaccination of guinea pigs with BCGΔBCG1419c resulted in increased anti-PPD IgG compared with those receiving BCG. Guinea pigs vaccinated with BCGΔBCG1419c showed a significant reduction of M. tuberculosis replication in lungs and spleens compared with BCG, as well as a significant reduction of pulmonary and extrapulmonary tuberculosis (TB) pathology measured using pathology scores recorded at necropsy. Evaluation of cytokines produced in lungs of infected guinea pigs showed that BCGΔBCG1419c significantly reduced TNF-α and IL-17 compared with BCG-vaccinated animals, with no changes in IL-10. This work demonstrates a significantly improved protection against pulmonary and extrapulmonary TB provided by BCGΔBCG1419c in susceptible guinea pigs together with an increased safety compared with BCG in several models. These results support the continued development of BCGΔBCG1419c as an effective vaccine for TB.
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Niño-Padilla EI, Velazquez C, Garibay-Escobar A. Mycobacterial biofilms as players in human infections: a review. BIOFOULING 2021; 37:410-432. [PMID: 34024206 DOI: 10.1080/08927014.2021.1925886] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 04/18/2021] [Accepted: 04/28/2021] [Indexed: 06/12/2023]
Abstract
The role of biofilms in pathogenicity and treatment strategies is often neglected in mycobacterial infections. In recent years, the emergence of nontuberculous mycobacterial infections has necessitated the development of novel prophylactic strategies and elucidation of the mechanisms underlying the establishment of chronic infections. More importantly, the question arises whether members of the Mycobacterium tuberculosis complex can form biofilms and contribute to latent tuberculosis and drug resistance because of the long-lasting and recalcitrant nature of its infections. This review discusses some of the molecular mechanisms by which biofilms could play a role in infection or pathological events in humans.
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Affiliation(s)
| | - Carlos Velazquez
- Departamento de Ciencias Químico Biológicas, Universidad de Sonora, Hermosillo, Sonora, México
| | - Adriana Garibay-Escobar
- Departamento de Ciencias Químico Biológicas, Universidad de Sonora, Hermosillo, Sonora, México
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9
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Velázquez-Fernández JB, Ferreira-Souza GHM, Rodríguez-Campos J, Aceves-Sánchez MDJ, Bravo-Madrigal J, Vallejo-Cardona AA, Flores-Valdez MA. Proteomic characterization of a second-generation version of the BCGΔBCG1419c vaccine candidate by means of electrospray-ionization quadrupole time-of-flight mass spectrometry. Pathog Dis 2020; 79:5986614. [PMID: 33201999 DOI: 10.1093/femspd/ftaa070] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Accepted: 11/13/2020] [Indexed: 01/11/2023] Open
Abstract
Tuberculosis (TB) is the most important infectious disease worldwide, based on the number of new cases and deaths reported by the World Health Organization. Several vaccine candidates against TB have been characterized at preclinical and clinical levels. The BCGΔBCG1419c vaccine candidate, which lacks the BCG1419c gene that encodes for a c-di-GMP phosphodiesterase, provides improved efficacy against chronic TB, reactivation from latent-like infection and against chronic TB in the presence of type 2 diabetes in murine models. We previously reported that compared with wild type BCG, BCGΔBCG1419c changed levels of several proteins. Here, using a label-free proteomic approach, we confirmed that a novel, second-generation version of BCGΔBCG1419c maintains changes in antigenic proteins already reported, and here we further found differences in secreted proteins, as well as that this new BCGΔBCG1419c version modifies its production of proteins involved in redox and nitrogen/protein metabolism compared with wild type BCG. This work contributes to the proteomic characterization of a novel vaccine candidate that is more effective against TB than parental BCG in diverse murine models.
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Affiliation(s)
| | - Gustavo Henrique Martins Ferreira-Souza
- Mass Spectrometry Research & Development Laboratory, SpectraMass Limited, Campinas, São Paulo, Brazil. Rua Monteiro Lobato, 255 - Cidade Universitária, Campinas - SP, 13083-862, Brazil
| | - Jacobo Rodríguez-Campos
- Centro de Investigación y Asistencia en Tecnología y diseño del Estado de Jalisco (CIATEJ), A. C., Unidad de Servicios Analíticos y Metrológicos, Av. Normalistas 800, Col. Colinas de la Normal, 44270 Guadalajara, Jalisco, México
| | - Michel de Jesús Aceves-Sánchez
- Centro de Investigación y Asistencia en Tecnología y diseño del Estado de Jalisco (CIATEJ), A.C., Biotecnología Médica y Farmacéutica, Av. Normalistas 800, Col. Colinas de la Normal, 44270 Guadalajara, Jalisco, México
| | - Jorge Bravo-Madrigal
- Centro de Investigación y Asistencia en Tecnología y diseño del Estado de Jalisco (CIATEJ), A.C., Biotecnología Médica y Farmacéutica, Av. Normalistas 800, Col. Colinas de la Normal, 44270 Guadalajara, Jalisco, México
| | - Alba Adriana Vallejo-Cardona
- CONACYT-CIATEJ, Biotecnología Médica y Farmacéutica, Av. Normalistas 800, Col. Colinas de la Normal, 44270 Guadalajara, Jalisco, México
| | - Mario Alberto Flores-Valdez
- Centro de Investigación y Asistencia en Tecnología y diseño del Estado de Jalisco (CIATEJ), A.C., Biotecnología Médica y Farmacéutica, Av. Normalistas 800, Col. Colinas de la Normal, 44270 Guadalajara, Jalisco, México
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10
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Vaca-González A, Flores-Valdez MA, Aceves-Sánchez MDJ, Camacho-Villegas TA, Pérez-Padilla NA, Burciaga-Flores M, De la Cruz MÁ, Ares MA, Mora-Montes HM, Bravo-Madrigal J, Gaona-Bernal J, Tamez-Castrellón AK. Overexpression of the celA1 gene in BCG modifies surface pellicle, glucosamine content in biofilms, and affects in vivo replication. Tuberculosis (Edinb) 2020; 125:102005. [PMID: 33032092 DOI: 10.1016/j.tube.2020.102005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Revised: 09/22/2020] [Accepted: 09/28/2020] [Indexed: 01/04/2023]
Abstract
Biofilm formed in vitro by mycobacteria has been associated with increased antibiotic tolerance as compared with planktonic cells. Cellulose has been identified as a component of DTT-exposed biofilms formed by M. tuberculosis. The celA1 gene of M. tuberculosis encodes a cellulase, which could affect the formation of biofilm by slow-growing mycobacteria. In this work, the celA1 gene of M. tuberculosis was cloned into the integrative pMV361 plasmid and then transformed into M. bovis BCG Pasteur to produce BCG:celA1, to have celA1 expressed from the strong promoter hsp60. We compared planktonic and biofilm growth, possible presence of CelA1 in whole protein extracts, quantitated biofilm, presence of monosaccharides, and bacillary burden in lungs after aerosol infection in BALB/c mice. Differences in the appearance of the surface pellicle and of the biofilm attached to the substrate were observed. In biofilms, we observed a significant decrease of glucosamine in BCG:celA1 compared with BCG:pMV361. Finally, BCG:celA1 had lower viable bacteria than the BCG:pMV361 strain after 24 h and 3 weeks post-infection, but no difference was found at 9 weeks post-infection.
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Affiliation(s)
- Alonso Vaca-González
- Maestría en Microbiología Médica, Departamento de Microbiología y Patología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Mexico; Biotecnología Médica y Farmacéutica, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, A. C., Av. Normalistas 800, Col. Colinas de la Normal, Guadalajara, 44270, Mexico
| | - Mario Alberto Flores-Valdez
- Biotecnología Médica y Farmacéutica, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, A. C., Av. Normalistas 800, Col. Colinas de la Normal, Guadalajara, 44270, Mexico.
| | - Michel de Jesús Aceves-Sánchez
- Biotecnología Médica y Farmacéutica, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, A. C., Av. Normalistas 800, Col. Colinas de la Normal, Guadalajara, 44270, Mexico
| | - Tanya Amanda Camacho-Villegas
- Biotecnología Médica y Farmacéutica, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, A. C., Av. Normalistas 800, Col. Colinas de la Normal, Guadalajara, 44270, Mexico
| | - Nayeli Areli Pérez-Padilla
- Biotecnología Médica y Farmacéutica, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, A. C., Av. Normalistas 800, Col. Colinas de la Normal, Guadalajara, 44270, Mexico
| | - Mirna Burciaga-Flores
- Biotecnología Médica y Farmacéutica, Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco, A. C., Av. Normalistas 800, Col. Colinas de la Normal, Guadalajara, 44270, Mexico
| | - Miguel Ángel De la Cruz
- Unidad de Investigación en Enfermedades Infecciosas y Parasitarias, Centro Médico Nacional (CMN) Siglo XXI, Instituto Mexicano de Seguro Social (IMSS), Ciudad de México, Mexico
| | - Miguel A Ares
- Unidad de Investigación en Enfermedades Infecciosas y Parasitarias, Centro Médico Nacional (CMN) Siglo XXI, Instituto Mexicano de Seguro Social (IMSS), Ciudad de México, Mexico
| | - Héctor Manuel Mora-Montes
- Departamento de Biología, División de Ciencias Naturales y Exactas, Universidad de Guanajuato, Guanajuato, Mexico
| | - Jorge Bravo-Madrigal
- Maestría en Microbiología Médica, Departamento de Microbiología y Patología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Mexico
| | - Jorge Gaona-Bernal
- Maestría en Microbiología Médica, Departamento de Microbiología y Patología, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Mexico
| | - Alma Karina Tamez-Castrellón
- Departamento de Biología, División de Ciencias Naturales y Exactas, Universidad de Guanajuato, Guanajuato, Mexico
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Transcriptional portrait of M. bovis BCG during biofilm production shows genes differentially expressed during intercellular aggregation and substrate attachment. Sci Rep 2020; 10:12578. [PMID: 32724037 PMCID: PMC7387457 DOI: 10.1038/s41598-020-69152-2] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 07/07/2020] [Indexed: 12/15/2022] Open
Abstract
Mycobacterium tuberculosis and M. smegmatis form drug-tolerant biofilms through dedicated genetic programs. In support of a stepwise process regulating biofilm production in mycobacteria, it was shown elsewhere that lsr2 participates in intercellular aggregation, while groEL1 was required for biofilm maturation in M. smegmatis. Here, by means of RNA-Seq, we monitored the early steps of biofilm production in M. bovis BCG, to distinguish intercellular aggregation from attachment to a surface. Genes encoding for the transcriptional regulators dosR and BCG0114 (Rv0081) were significantly regulated and responded differently to intercellular aggregation and surface attachment. Moreover, a M. tuberculosis H37Rv deletion mutant in the Rv3134c-dosS-dosR regulon, formed less biofilm than wild type M. tuberculosis, a phenotype reverted upon reintroduction of this operon into the mutant. Combining RT-qPCR with microbiological assays (colony and surface pellicle morphologies, biofilm quantification, Ziehl–Neelsen staining, growth curve and replication of planktonic cells), we found that BCG0642c affected biofilm production and replication of planktonic BCG, whereas ethR affected only phenotypes linked to planktonic cells despite its downregulation at the intercellular aggregation step. Our results provide evidence for a stage-dependent expression of genes that contribute to biofilm production in slow-growing mycobacteria.
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