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Titanium Particles Modulate Lymphocyte and Macrophage Polarization in Peri-Implant Gingival Tissues

Kheder, Waad; Bouzid, Amal; Venkatachalam, Thenmozhi; Talaat, Iman M; Elemam, Noha Mousaad; Raju, Tom Kalathil; Sheela, Soumya; ... Hamoudi, Rifat; + view all (2023) Titanium Particles Modulate Lymphocyte and Macrophage Polarization in Peri-Implant Gingival Tissues. International Journal of Molecular Sciences , 24 (14) , Article 11644. 10.3390/ijms241411644. Green open access

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Abstract

Titanium dental implants are one of the modalities to replace missing teeth. The release of titanium particles from the implant’s surface may modulate the immune cells, resulting in implant failure. However, little is known about the immune microenvironment that plays a role in peri-implant inflammation as a consequence of titanium particles. In this study, the peri-implant gingival tissues were collected from patients with failed implants, successful implants and no implants, and then a whole transcriptome analysis was performed. The gene set enrichment analysis confirmed that macrophage M1/M2 polarization and lymphocyte proliferation were differentially expressed between the study groups. The functional clustering and pathway analysis of the differentially expressed genes between the failed implants and successful implants versus no implants revealed that the immune response pathways were the most common in both comparisons, implying the critical role of infiltrating immune cells in the peri-implant tissues. The H&E and IHC staining confirmed the presence of titanium particles and immune cells in the tissue samples, with an increase in the infiltration of lymphocytes and macrophages in the failed implant samples. The in vitro validation showed a significant increase in the level of IL-1β, IL-8 and IL-18 expression by macrophages. Our findings showed evidence that titanium particles modulate lymphocyte and macrophage polarization in peri-implant gingival tissues, which can help in the understanding of the imbalance in osteoblast–osteoclast activity and failure of dental implant osseointegration.

Type: Article
Title: Titanium Particles Modulate Lymphocyte and Macrophage Polarization in Peri-Implant Gingival Tissues
Location: Switzerland
Open access status: An open access version is available from UCL Discovery
DOI: 10.3390/ijms241411644
Publisher version: https://doi.org/10.3390/ijms241411644
Language: English
Additional information: Copyright: © 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/).
Keywords: Science & Technology, Life Sciences & Biomedicine, Physical Sciences, Biochemistry & Molecular Biology, Chemistry, Multidisciplinary, Chemistry, dental implants, peri-implantitis, titanium, lymphocytes, macrophage polarization, IL-1 beta, IL-18, IL-8, WEAR PARTICLES, EXPRESSION, CHEMOKINES, MIGRATION, HEALTH, GENES, CELLS
UCL classification: UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Medical Sciences > Div of Surgery and Interventional Sci > Department of Surgical Biotechnology
URI: https://discovery.ucl.ac.uk/id/eprint/10181630
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