1
|
Santana da Costa T, Rodrigues da Silva M, Jerônimo Barbosa JC, Da Silva Das Neves U, de Jesus MB, Tasic L. Biogenic silver nanoparticles' antibacterial activity and cytotoxicity on human hepatocarcinoma cells (Huh-7). RSC Adv 2024; 14:2192-2204. [PMID: 38213978 PMCID: PMC10777275 DOI: 10.1039/d3ra07733k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2023] [Accepted: 12/31/2023] [Indexed: 01/13/2024] Open
Abstract
Exploring diverse synthetic pathways for nanomaterial synthesis has emerged as a promising direction. For example, silver nanoparticles (AgNPs) are synthesized using different approaches yielding nanomaterials with distinct morphological, physical and biological properties. Hence, the present study reports the biogenic synthesis of silver nanoparticles using the aqueous secretome of the fungus Fusarium oxysporum f. sp. cubense (AgNP@Fo) and orange peel extract (AgNP@OR). The physical and morphological properties of synthesized nanoparticles were similar, with AgNP@Fo measuring 56.43 ± 19.18 nm and AgNP@OR measuring 39.97 ± 19.72 nm in size. The zeta potentials for the nanoparticles were low, -26.8 ± 7.55 and -26.2 ± 2.87 mV for AgNP@Fo and AgNP@OR, respectively, demonstrating a similar negative charge. The spherical morphologies of both nanoparticles were evidenced by Scanning Transmission Electron Microscopy (STEM) and Atomic Force Microscopy (AFM). However, despite their similar physical and morphological properties, AgNPs demonstrated different bioactivities. We evaluated and compared the antimicrobial efficacy of these nanoparticles against a range of bacteria, such as Staphylococcus aureus, Enterococcus faecalis, Pseudomonas aeruginosa, and Escherichia coli. The AgNP@Fo showed Minimum Inhibitory Concentration (MIC) values ranging from 0.84 to 1.68 μg mL-1 and were around ten times more potent compared to AgNP@OR. The anticancer activities of both nanoparticles were investigated using human hepatocarcinoma cells (Huh-7), where AgNP@Fo exhibited around 20 times higher cytotoxicity than AgNP@OR with an IC50 value of 0.545 μmol L-1. Anticancer effects were demonstrated by the MTT, confirmed by the calcein-AM assay and fluorescence imaging. This study establishes solid groundwork for future exploration of molecular interactions of nanoparticles synthesized through distinct biosynthetic routes, particularly within bacterial and cancerous cell environments.
Collapse
Affiliation(s)
- Thyerre Santana da Costa
- Institute of Chemistry, Biological Chemistry Laboratory, Universidade Estadual de Campinas, UNICAMP Campinas SP 13083-970 Brazil
| | - Mariana Rodrigues da Silva
- Department of Biochemistry and Tissue Biology, Institute of Biology, Universidade Estadual de Campinas, UNICAMP Campinas SP 13083-862 Brazil
| | - Júlio César Jerônimo Barbosa
- Institute of Chemistry, Biological Chemistry Laboratory, Universidade Estadual de Campinas, UNICAMP Campinas SP 13083-970 Brazil
- Department of Organic Chemistry, Institute of Chemistry, Universidade Estadual de Campinas, UNICAMP Campinas SP 13083-970 Brazil
| | - Uedson Da Silva Das Neves
- Institute of Chemistry, Biological Chemistry Laboratory, Universidade Estadual de Campinas, UNICAMP Campinas SP 13083-970 Brazil
| | - Marcelo Bispo de Jesus
- Department of Biochemistry and Tissue Biology, Institute of Biology, Universidade Estadual de Campinas, UNICAMP Campinas SP 13083-862 Brazil
| | - Ljubica Tasic
- Institute of Chemistry, Biological Chemistry Laboratory, Universidade Estadual de Campinas, UNICAMP Campinas SP 13083-970 Brazil
| |
Collapse
|
2
|
Nokso-Koivisto J, Ehrlich GD, Enoksson F, Komatsu K, Mason K, Melhus Å, Patel JA, Vijayasekaran S, Ryan A. Otitis media: Interactions between host and environment, immune and inflammatory responses. Int J Pediatr Otorhinolaryngol 2024; 176:111798. [PMID: 38041988 DOI: 10.1016/j.ijporl.2023.111798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2023] [Revised: 11/12/2023] [Accepted: 11/19/2023] [Indexed: 12/04/2023]
Abstract
OBJECTIVE To review and highlight progress in otitis media (OM) research in the areas of immunology, inflammation, environmental influences and host-pathogen responses from 2019 to 2023. Opportunities for innovative future research were also identified. DATA SOURCES PubMed database of the National Library of Medicine. REVIEW METHODS Key topics were assigned to each panel member for detailed review. Search of the literature was from June 2019 until February 2023. Draft reviews were collated, circulated, and discussed among panel members at the 22nd International Symposium on Recent Advances in Otitis Media in June 2023. The final manuscript was prepared and approved by all the panel members. CONCLUSIONS Important advances were identified in: environmental influences that enhance OM susceptibility; polymicrobial middle ear (ME) infections; the role of adaptive immunity defects in otitis-proneness; additional genes linked to OM; leukocyte contributions to OM pathogenesis and recovery; and novel interventions in OM based on host responses to infection. Innovative areas of research included: identification of novel bacterial genes and pathways important for OM persistence, bacterial adaptations and evolution that enhance chronicity; animal and human ME gene expression, including at the single-cell level; and Sars-CoV-2 infection of the ME and Eustachian tube.
Collapse
Affiliation(s)
- Johanna Nokso-Koivisto
- Department of Otorhinolaryngology, Helsinki University Hospital and University of Helsinki, Helsinki, Finland.
| | - Garth D Ehrlich
- Department of Microbiology and Immunology and Department of Otolaryngology - Head and Neck Surgery, Drexel University College of Medicine, Philadelphia, PA, USA
| | | | - Kensei Komatsu
- Center for Inflammation, Immunity & Infection, Institute for Biomedical Sciences, Georgia State University, Atlanta, GA, USA
| | - Kevin Mason
- The Research Institute at Nationwide Children's Hospital, Infectious Diseases Institute, The Ohio State University School of Medicine, Columbus, OH, USA
| | - Åsa Melhus
- Department of Medical Sciences, Section of Clinical Bacteriology, Uppsala University, Uppsala, Sweden
| | - Janak A Patel
- Department of Infection Control & Healthcare Epidemiology and Division of Pediatric Infectious Diseases, Department of Pediatrics, University of Texas Medical Branch, Galveston, TX, USA
| | - Shiyan Vijayasekaran
- Perth ENT Centre, Perth Children's Hospital, University of Western Australia, Perth, Australia
| | - Allen Ryan
- Department of Surgery, Division of Otolaryngology, University of California San Diego, San Diego, CA, USA
| |
Collapse
|
3
|
Wills BM, Garai P, Dickinson Q, Meyer JG, Brockman KL. Phase variable acetylation of lipooligosaccharide modifies antibody production and opsonophagocytic killing of non-typeable Haemophilus influenzae. iScience 2023; 26:107785. [PMID: 37727736 PMCID: PMC10505976 DOI: 10.1016/j.isci.2023.107785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 05/12/2023] [Accepted: 08/28/2023] [Indexed: 09/21/2023] Open
Abstract
Non-typeable Haemophilus influenzae (NTHi) causes millions of infections each year. Though it is primarily known to cause otitis media, recent studies have shown NTHi is emerging as a primary pathogen for invasive infection, prompting the need for new vaccines and treatments. Lipooligosaccharide (LOS) has been identified as a potential vaccine candidate due to its immunogenic nature and outer membrane localization. Yet, phase variable expression of genes involved in LOS synthesis has complicated vaccine development. In this study, we used a chinchilla model of otitis media to investigate how phase variation of oafA, a gene involved in LOS biosynthesis, affects antibody production in response to infection. We found that acetylation of LOS by OafA inhibited production of LOS-specific antibodies during infection and that NTHi expressing acetylated LOS were subsequently better protected against opsonophagocytic killing. These findings highlight the importance of understanding how phase variable modifications might affect vaccine efficacy and success.
Collapse
Affiliation(s)
- Brandon M. Wills
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Preeti Garai
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Quinn Dickinson
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Jesse G. Meyer
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Kenneth L. Brockman
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| |
Collapse
|
4
|
Zhang Y, Jen FEC, Fox KL, Edwards JL, Jennings MP. The biosynthesis and role of phosphorylcholine in pathogenic and nonpathogenic bacteria. Trends Microbiol 2023:S0966-842X(23)00024-0. [PMID: 36863982 DOI: 10.1016/j.tim.2023.01.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 01/18/2023] [Accepted: 01/23/2023] [Indexed: 03/03/2023]
Abstract
Phosphorylcholine (ChoP) can be found in all life forms. Although this molecule was first thought to be uncommon in bacteria, it is now appreciated that many bacteria express ChoP on their surface. ChoP is usually attached to a glycan structure, but in some cases, it is added as a post-translational modification to proteins. Recent findings have demonstrated the role of ChoP modification and phase variation (ON/OFF switching) in bacterial pathogenesis. However, the mechanisms of ChoP synthesis are still unclear in some bacteria. Here, we review the literature and examine the recent developments in ChoP-modified proteins and glycolipids and of ChoP biosynthetic pathways. We discuss how the well-studied Lic1 pathway exclusively mediates ChoP attachment to glycans but not to proteins. Finally, we provide a review of the role of ChoP in bacterial pathobiology and the role of ChoP in modulating the immune response.
Collapse
Affiliation(s)
- Yuan Zhang
- Institute for Glycomics, Griffith University, Gold Coast Campus, Southport, QLD 4222, Australia
| | - Freda E-C Jen
- Institute for Glycomics, Griffith University, Gold Coast Campus, Southport, QLD 4222, Australia
| | - Kate L Fox
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Jennifer L Edwards
- Center for Microbial Pathogenesis, Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, OH 43205, USA; Department of Pediatrics, The Ohio State University, Columbus, OH 43210, USA
| | - Michael P Jennings
- Institute for Glycomics, Griffith University, Gold Coast Campus, Southport, QLD 4222, Australia.
| |
Collapse
|