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Bainter W, Platt CD, Park SY, Stafstrom K, Wallace JG, Peters ZT, Massaad MJ, Becuwe M, Salinas SA, Jones J, Beaussant-Cohen S, Jaber F, Yang JS, Walther TC, Orange JS, Rao C, Rakoff-Nahoum S, Tsokos M, Naseem SUR, Al-Tamemi S, Chou J, Hsu VW, Geha RS. Combined immunodeficiency due to a mutation in the γ1 subunit of the coat protein I complex. J Clin Invest 2021; 131:140494. [PMID: 33529166 DOI: 10.1172/jci140494] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Accepted: 11/25/2020] [Indexed: 12/14/2022] Open
Abstract
The coat protein I (COPI) complex mediates retrograde trafficking from the Golgi to the endoplasmic reticulum (ER). Five siblings with persistent bacterial and viral infections and defective humoral and cellular immunity had a homozygous p.K652E mutation in the γ1 subunit of COPI (γ1-COP). The mutation disrupts COPI binding to the KDEL receptor and impairs the retrieval of KDEL-bearing chaperones from the Golgi to the ER. Homozygous Copg1K652E mice had increased ER stress in activated T and B cells, poor antibody responses, and normal numbers of T cells that proliferated normally, but underwent increased apoptosis upon activation. Exposure of the mutants to pet store mice caused weight loss, lymphopenia, and defective T cell proliferation that recapitulated the findings in the patients. The ER stress-relieving agent tauroursodeoxycholic acid corrected the immune defects of the mutants and reversed the phenotype they acquired following exposure to pet store mice. This study establishes the role of γ1-COP in the ER retrieval of KDEL-bearing chaperones and thereby the importance of ER homeostasis in adaptive immunity.
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Affiliation(s)
- Wayne Bainter
- Division of Immunology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Craig D Platt
- Division of Immunology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Seung-Yeol Park
- Division of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.,Department of Life Sciences, Pohang University of Science and Technology, Pohang, Gyeongbuk, Republic of Korea
| | - Kelsey Stafstrom
- Division of Immunology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Jacqueline G Wallace
- Division of Immunology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Zachary T Peters
- Division of Immunology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Michel J Massaad
- Division of Immunology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Michel Becuwe
- Department of Genetics and Complex Diseases and Department of Molecular Metabolism, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Sandra Andrea Salinas
- Division of Immunogenetics, Department of Pediatrics, Morgan Stanley Children's Hospital of New York Presbyterian, Columbia University Irving Medical Center, New York, New York, USA
| | - Jennifer Jones
- Division of Immunology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Sarah Beaussant-Cohen
- Division of Immunology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Faris Jaber
- Division of Immunology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Jia-Shu Yang
- Division of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Tobias C Walther
- Department of Genetics and Complex Diseases and Department of Molecular Metabolism, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Jordan S Orange
- Division of Immunogenetics, Department of Pediatrics, Morgan Stanley Children's Hospital of New York Presbyterian, Columbia University Irving Medical Center, New York, New York, USA
| | - Chitong Rao
- Division of Infectious Diseases, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Seth Rakoff-Nahoum
- Division of Infectious Diseases, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Maria Tsokos
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA
| | | | - Salem Al-Tamemi
- Department of Child Health, Sultan Qaboos University Hospital, Muscat, Oman
| | - Janet Chou
- Division of Immunology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Victor W Hsu
- Division of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Raif S Geha
- Division of Immunology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
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Kajfasz JK, Katrak C, Ganguly T, Vargas J, Wright L, Peters ZT, Spatafora GA, Abranches J, Lemos JA. Manganese Uptake, Mediated by SloABC and MntH, Is Essential for the Fitness of Streptococcus mutans. mSphere 2020; 5:e00764-19. [PMID: 31915219 PMCID: PMC6952196 DOI: 10.1128/msphere.00764-19] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Accepted: 12/06/2019] [Indexed: 01/02/2023] Open
Abstract
Early epidemiological studies implicated manganese (Mn) as a possible caries-promoting agent, while laboratory studies have indicated that manganese stimulates the expression of virulence-related factors in the dental pathogen Streptococcus mutans To better understand the importance of manganese homeostasis to S. mutans pathophysiology, we first used RNA sequencing to obtain the global transcriptional profile of S. mutans UA159 grown under Mn-restricted conditions. Among the most highly expressed genes were those of the entire sloABC operon, encoding a dual iron/manganese transporter, and an uncharacterized gene, here mntH, that codes for a protein bearing strong similarity to Nramp-type transporters. While inactivation of sloC, which encodes the lipoprotein receptor of the SloABC system, or of mntH alone had no major consequence for the overall fitness of S. mutans, simultaneous inactivation of sloC and mntH (ΔsloC ΔmntH) impaired growth and survival under Mn-restricted conditions, including in human saliva or in the presence of calprotectin. Further, disruption of Mn transport resulted in diminished stress tolerance and reduced biofilm formation in the presence of sucrose. These phenotypes were markedly improved when cells were provided with excess Mn. Metal quantifications revealed that the single mutant strains contained intracellular levels of Mn similar to those seen with the parent strain, whereas Mn was nearly undetectable in the ΔsloC ΔmntH strain. Collectively, these results reveal that SloABC and MntH work independently and cooperatively to promote cell growth under Mn-restricted conditions and that maintenance of Mn homeostasis is essential for the expression of major virulence attributes in S. mutansIMPORTANCE As transition biometals such as manganese (Mn) are essential for all forms of life, the ability to scavenge biometals in the metal-restricted host environment is an important trait of successful cariogenic pathobionts. Here, we showed that the caries pathogen Streptococcus mutans utilizes two Mn transport systems, namely, SloABC and MntH, to acquire Mn from the environment and that the ability to maintain the cellular levels of Mn is important for the manifestation of characteristics that associate S. mutans with dental caries. Our results indicate that the development of strategies to deprive S. mutans of Mn hold promise in the combat against this important bacterial pathogen.
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Affiliation(s)
- Jessica K Kajfasz
- Department of Oral Biology, University of Florida College of Dentistry, Gainesville, Florida, USA
| | - Callahan Katrak
- Department of Oral Biology, University of Florida College of Dentistry, Gainesville, Florida, USA
| | - Tridib Ganguly
- Department of Oral Biology, University of Florida College of Dentistry, Gainesville, Florida, USA
| | - Jonathan Vargas
- Department of Oral Biology, University of Florida College of Dentistry, Gainesville, Florida, USA
| | - Logan Wright
- Department of Biology, Middlebury College, Middlebury, Vermont, USA
| | - Zachary T Peters
- Department of Biology, Middlebury College, Middlebury, Vermont, USA
| | | | - Jacqueline Abranches
- Department of Oral Biology, University of Florida College of Dentistry, Gainesville, Florida, USA
| | - José A Lemos
- Department of Oral Biology, University of Florida College of Dentistry, Gainesville, Florida, USA
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