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Xiu F, Li X, Liu L, Xi Y, Yi X, Li Y, You X. Mycoplasma invasion into host cells: An integrated model of infection strategy. Mol Microbiol 2024; 121:814-830. [PMID: 38293733 DOI: 10.1111/mmi.15232] [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: 07/07/2023] [Revised: 01/12/2024] [Accepted: 01/16/2024] [Indexed: 02/01/2024]
Abstract
Mycoplasma belong to the genus Mollicutes and are notable for their small genome sizes (500-1300 kb) and limited biosynthetic capabilities. They exhibit pathogenicity by invading various cell types to survive as intracellular pathogens. Adhesion is a crucial prerequisite for successful invasion and is orchestrated by the interplay between mycoplasma surface adhesins and specific receptors on the host cell membrane. Invasion relies heavily on clathrin- and caveolae-mediated internalization, accompanied by multiple activated kinases, cytoskeletal rearrangement, and a myriad of morphological alterations, such as membrane invagination, nuclear hypertrophy and aggregation, cytoplasmic edema, and vacuolization. Once mycoplasma successfully invade host cells, they establish resilient sanctuaries in vesicles, cytoplasm, perinuclear regions, and the nucleus, wherein specific environmental conditions favor long-term survival. Although lysosomal degradation and autophagy can eliminate most invading mycoplasmas, some viable bacteria can be released into the extracellular environment via exocytosis, a crucial factor in the prolonging infection persistence. This review explores the intricate mechanisms by which mycoplasma invades host cells and perpetuates their elusive survival, with the aim of highlighting the challenge of eradicating this enigmatic bacterium.
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Affiliation(s)
- Feichen Xiu
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pathogenic Biology, Hengyang Medical College, University of South China, Hengyang, China
| | - Xinru Li
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pathogenic Biology, Hengyang Medical College, University of South China, Hengyang, China
| | - Lu Liu
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pathogenic Biology, Hengyang Medical College, University of South China, Hengyang, China
| | - Yixuan Xi
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pathogenic Biology, Hengyang Medical College, University of South China, Hengyang, China
| | - Xinchao Yi
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pathogenic Biology, Hengyang Medical College, University of South China, Hengyang, China
| | - Yumeng Li
- Department of Clinical Laboratory Medicine, The First Affiliated Hospital, Hengyang Medical College, University of South China, Hengyang, China
| | - Xiaoxing You
- Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pathogenic Biology, Hengyang Medical College, University of South China, Hengyang, China
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Benedetti F, Mongodin EF, Badger JH, Munawwar A, Cellini A, Yuan W, Silvestri G, Kraus CN, Marini S, Rathinam CV, Salemi M, Tettelin H, Gallo RC, Zella D. Bacterial DnaK reduces the activity of anti-cancer drugs cisplatin and 5FU. J Transl Med 2024; 22:269. [PMID: 38475767 PMCID: PMC10935962 DOI: 10.1186/s12967-024-05078-x] [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: 02/16/2024] [Accepted: 03/07/2024] [Indexed: 03/14/2024] Open
Abstract
BACKGROUND Chemotherapy is a primary treatment for cancer, but its efficacy is often limited by cancer-associated bacteria (CAB) that impair tumor suppressor functions. Our previous research found that Mycoplasma fermentans DnaK, a chaperone protein, impairs p53 activities, which are essential for most anti-cancer chemotherapeutic responses. METHODS To investigate the role of DnaK in chemotherapy, we treated cancer cell lines with M. fermentans DnaK and then with commonly used p53-dependent anti-cancer drugs (cisplatin and 5FU). We evaluated the cells' survival in the presence or absence of a DnaK-binding peptide (ARV-1502). We also validated our findings using primary tumor cells from a novel DnaK knock-in mouse model. To provide a broader context for the clinical significance of these findings, we investigated human primary cancer sequencing datasets from The Cancer Genome Atlas (TCGA). We identified F. nucleatum as a CAB carrying DnaK with an amino acid composition highly similar to M. fermentans DnaK. Therefore, we investigated the effect of F. nucleatum DnaK on the anti-cancer activity of cisplatin and 5FU. RESULTS Our results show that both M. fermentans and F. nucleatum DnaKs reduce the effectiveness of cisplatin and 5FU. However, the use of ARV-1502 effectively restored the drugs' anti-cancer efficacy. CONCLUSIONS Our findings offer a practical framework for designing and implementing novel personalized anti-cancer strategies by targeting specific bacterial DnaKs in patients with poor response to chemotherapy, underscoring the potential for microbiome-based personalized cancer therapies.
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Affiliation(s)
- Francesca Benedetti
- Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Emmanuel F Mongodin
- Department of Microbiology and Immunology, Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Jonathan H Badger
- Laboratory of Integrative Cancer Immunology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, DHHS, Bethesda, MD, USA
| | - Arshi Munawwar
- Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Ashley Cellini
- Pathology Biorepository Shared Service, University of Maryland Greenebaum Comprehensive Cancer Center, Baltimore, MD, 21201, USA
| | - Weirong Yuan
- Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Giovannino Silvestri
- Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
| | | | - Simone Marini
- Emerging Pathogens Institute, University of Florida, Gainesville, FL, USA
- Department of Epidemiology, University of Florida, Gainesville, FL, USA
| | - Chozha V Rathinam
- Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Marco Salemi
- Emerging Pathogens Institute, University of Florida, Gainesville, FL, USA
- Department of Pathology, University of Florida, Gainesville, FL, USA
| | - Hervé Tettelin
- Department of Microbiology and Immunology, Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, 21201, USA
| | - Robert C Gallo
- Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD, USA.
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD, USA.
| | - Davide Zella
- Institute of Human Virology, University of Maryland School of Medicine, Baltimore, MD, USA.
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD, USA.
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Benedetti F, Silvestri G, Denaro F, Finesso G, Contreras-Galindo R, Munawwar A, Williams S, Davis H, Bryant J, Wang Y, Radaelli E, Rathinam CV, Gallo RC, Zella D. Mycoplasma DnaK expression increases cancer development in vivo upon DNA damage. Proc Natl Acad Sci U S A 2024; 121:e2320859121. [PMID: 38412130 PMCID: PMC10927570 DOI: 10.1073/pnas.2320859121] [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: 11/27/2023] [Accepted: 01/24/2024] [Indexed: 02/29/2024] Open
Abstract
Well-controlled repair mechanisms are involved in the maintenance of genomic stability, and their failure can precipitate DNA abnormalities and elevate tumor risk. In addition, the tumor microenvironment, enriched with factors inducing oxidative stress and affecting cell cycle checkpoints, intensifies DNA damage when repair pathways falter. Recent research has unveiled associations between certain bacteria, including Mycoplasmas, and various cancers, and the causative mechanism(s) are under active investigation. We previously showed that Mycoplasma fermentans DnaK, an HSP70 family chaperone protein, hampers the activity of proteins like PARP1 and p53, crucial for genomic integrity. Moreover, our analysis of its interactome in human cancer cell lines revealed DnaK's engagement with several components of DNA-repair machinery. Finally, in vivo experiments performed in our laboratory using a DnaK knock-in mouse model generated by our group demonstrated that DnaK exposure led to increased DNA copy number variants, indicative of genomic instability. We present here evidence that expression of DnaK is linked to increased i) incidence of tumors in vivo upon exposure to urethane, a DNA damaging agent; ii) spontaneous DNA damage ex vivo; and iii) expression of proinflammatory cytokines ex vivo, variations in reactive oxygen species levels, and increased β-galactosidase activity across tissues. Moreover, DnaK was associated with increased centromeric instability. Overall, these findings highlight the significance of Mycoplasma DnaK in the etiology of cancer and other genetic disorders providing a promising target for prevention, diagnostics, and therapeutics.
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Affiliation(s)
- Francesca Benedetti
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD21201
| | - Giovannino Silvestri
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD21201
| | - Frank Denaro
- Department of Biology, Morgan State University, Baltimore, MD21251
| | - Giovanni Finesso
- Comparative Pathology Core, Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA19104
| | | | - Arshi Munawwar
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
| | - Sumiko Williams
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
- Department of Biology, Morgan State University, Baltimore, MD21251
| | - Harry Davis
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
| | - Joseph Bryant
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
| | - Yin Wang
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
- Department of Surgery, School of Medicine, University of Maryland School of Medicine, Baltimore, MD21201
| | - Enrico Radaelli
- Comparative Pathology Core, Department of Pathobiology, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA19104
| | - Chozha V. Rathinam
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD21201
| | - Robert C. Gallo
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
- Department of Medicine, University of Maryland School of Medicine, Baltimore, MD21201
| | - Davide Zella
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD21201
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Benedetti F, Silvestri G, Saadat S, Denaro F, Latinovic OS, Davis H, Williams S, Bryant J, Ippodrino R, Rathinam CV, Gallo RC, Zella D. Mycoplasma DnaK increases DNA copy number variants in vivo. Proc Natl Acad Sci U S A 2023; 120:e2219897120. [PMID: 37459550 PMCID: PMC10372619 DOI: 10.1073/pnas.2219897120] [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: 11/21/2022] [Accepted: 06/14/2023] [Indexed: 07/20/2023] Open
Abstract
The human microbiota affects critical cellular functions, although the responsible mechanism(s) is still poorly understood. In this regard, we previously showed that Mycoplasma fermentans DnaK, an HSP70 chaperone protein, hampers the activity of important cellular proteins responsible for DNA integrity. Here, we describe a novel DnaK knock-in mouse model generated in our laboratory to study the effect of M. fermentans DnaK expression in vivo. By using an array-based comparative genomic hybridization assay, we demonstrate that exposure to DnaK was associated with a higher number of DNA copy number variants (CNVs) indicative of unbalanced chromosomal alterations, together with reduced fertility and a high rate of fetal abnormalities. Consistent with their implication in genetic disorders, one of these CNVs caused a homozygous Grid2 deletion, resulting in an aberrant ataxic phenotype that recapitulates the extensive biallelic deletion in the Grid2 gene classified in humans as autosomal recessive spinocerebellar ataxia 18. Our data highlight a connection between components of the human urogenital tract microbiota, namely Mycoplasmas, and genetic abnormalities in the form of DNA CNVs, with obvious relevant medical, diagnostic, and therapeutic implications.
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Affiliation(s)
- Francesca Benedetti
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD21201
| | - Giovannino Silvestri
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
- Department of Medicine, School of Medicine, University of Maryland School of Medicine, Baltimore, MD21201
| | - Saman Saadat
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
| | - Frank Denaro
- Department of Biology, Morgan State University, Baltimore, MD21251
| | - Olga S. Latinovic
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
- Department of Microbiology and Immunology, University of Maryland School of Medicine, Baltimore, MD21201
| | - Harry Davis
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
| | - Sumiko Williams
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
| | - Joseph Bryant
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
| | | | - Chozha V. Rathinam
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
- Department of Medicine, School of Medicine, University of Maryland School of Medicine, Baltimore, MD21201
| | - Robert C. Gallo
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
- Department of Medicine, School of Medicine, University of Maryland School of Medicine, Baltimore, MD21201
| | - Davide Zella
- Institute of Human Virology and Global Virus Network Center, University of Maryland School of Medicine, Baltimore, MD21201
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD21201
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