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Szabo D, Ostorhazi E, Stercz B, Makra N, Penzes K, Kristof K, Antal I, Rethelyi JM, Zsigmond RI, Birtalan E, Merkely B, Tamas L. Specific nasopharyngeal Corynebacterium strains serve as gatekeepers against SARS-CoV-2 infection. GeroScience 2023; 45:2927-2938. [PMID: 37338780 PMCID: PMC10643471 DOI: 10.1007/s11357-023-00850-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 06/01/2023] [Indexed: 06/21/2023] Open
Abstract
The SARS-CoV-2 virus is still causing a worldwide problem. The virus settles primarily on the nasal mucosa, and the infection and its course depend on individual susceptibility. Our aim was to investigate the nasopharynx composition's role in the individual susceptibility. During the first phase of SARS-CoV-2 pandemic, nasopharyngeal microbiome samples of close contact unvaccinated patients were investigated by 16S rRNA analysis and by culturing. The whole genome of cultured Corynebacteria was sequenced. The relative expression of ACE2, TMPRSS2, and cathepsin L on Caco-2 cells and the strength of S1-ACE2 binding were determined in the presence of Corynebacteria. From 55 close contacts exposed to identical SARS-CoV-2 exposure, 26 patients became infected and 29 remained uninfected. The nasopharyngeal microbiome analysis showed significantly higher abundance of Corynebacteria in uninfected group. Corynebacterium accolens could be cultivated only from uninfected individuals and Corynebacterium propinquum from both infected and uninfected. Corynebacteria from uninfected patient significantly reduced the ACE2 and cathepsin L expression. C. accolens significantly reduced the TMPRSS2 expression compared to other Corynebacteria. Furthermore, Corynebacterium spp. weakened the binding of the S1-ACE2. Most C. accolens isolates harbored the TAG lipase LipS1 gene. Based on these results, the presence of Corynebacterium spp. in the nasopharyngeal microbiota, especially C. accolens strains, could reduce the individual susceptibility to SARS-CoV-2 infection by several mechanisms: by downregulation the ACE2, the TMPRSS2 receptors, and cathepsin L in the host; through the inhibition of S1-ACE2 binding; and lipase production. These results suggest the use of C. accolens strains as probiotics in the nasopharynx in the future.
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Affiliation(s)
- Dora Szabo
- Institute of Medical Microbiology, Semmelweis University, Üllői Street 26, 1085, Budapest, Hungary.
- Human Microbiota Study Group, Semmelweis University-Eötvös Lóránd Research Network, Budapest, Hungary.
| | - Eszter Ostorhazi
- Institute of Medical Microbiology, Semmelweis University, Üllői Street 26, 1085, Budapest, Hungary
- Human Microbiota Study Group, Semmelweis University-Eötvös Lóránd Research Network, Budapest, Hungary
| | - Balazs Stercz
- Institute of Medical Microbiology, Semmelweis University, Üllői Street 26, 1085, Budapest, Hungary
- Human Microbiota Study Group, Semmelweis University-Eötvös Lóránd Research Network, Budapest, Hungary
| | - Nora Makra
- Institute of Medical Microbiology, Semmelweis University, Üllői Street 26, 1085, Budapest, Hungary
| | - Kinga Penzes
- Institute of Medical Microbiology, Semmelweis University, Üllői Street 26, 1085, Budapest, Hungary
| | - Katalin Kristof
- Institute of Laboratory Medicine, Clinical Microbiology Laboratory, Semmelweis University, Budapest, Hungary
| | - Istvan Antal
- Department of Pharmaceutics, Semmelweis University, Budapest, Hungary
| | - Janos M Rethelyi
- Department of Psychiatry and Psychotherapy, Semmelweis University, Budapest, Hungary
| | - Reka I Zsigmond
- Department of Psychiatry and Psychotherapy, Semmelweis University, Budapest, Hungary
| | - Ede Birtalan
- Department of Oto-Rhino-Laryngology and Head and Neck Surgery, Semmelweis University, Budapest, Hungary
| | - Bela Merkely
- Heart and Vascular Center, Semmelweis University, Budapest, Hungary
| | - Laszlo Tamas
- Department of Oto-Rhino-Laryngology and Head and Neck Surgery, Semmelweis University, Budapest, Hungary
- Department of Voice, Speech and Swallowing Therapy, Faculty of Health Sciences, Semmelweis University, Budapest, Hungary
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Rogers M, Kelly S, Varga J, Penzes K. Investigation of cyclic depsipeptides by fast atom bombardment-mass spectrometry. Pept Res 1993; 6:95-9. [PMID: 8485342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
In recent years, the synthetic analogue elcatonin has been used successfully in the treatment of osteoporosis. During an investigation of synthetic strategies for the production of elcatonin, a number of peptide products were generated. These could be purified by liquid chromatography and were shown to have identical amino acid compositions. Investigation by fast atom bombardment-mass spectrometry revealed three of the peptides to have a common pseudomolecular ion but notably dissimilar fragmentation patterns. Further studies involving chemical modification, mass spectrometry and chromatographic separation showed these products to be novel depsipeptides, cyclized with an ester bond between either the serine or the threonine residue and the side chain of aminosuberic acid.
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Affiliation(s)
- M Rogers
- M-Scan, Inc., West Chester, PA 19380
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