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Bowen J, Cross C. The Role of the Innate Immune Response in Oral Mucositis Pathogenesis. Int J Mol Sci 2023; 24:16314. [PMID: 38003503 PMCID: PMC10670995 DOI: 10.3390/ijms242216314] [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: 10/07/2023] [Revised: 11/11/2023] [Accepted: 11/12/2023] [Indexed: 11/26/2023] Open
Abstract
Oral mucositis (OM) is a significant complication of cancer therapy with limited management strategies. Whilst inflammation is a central feature of destructive and ultimately ulcerative pathology, to date, attempts to mitigate damage via this mechanism have proven limited. A relatively underexamined aspect of OM development is the contribution of elements of the innate immune system. In particular, the role played by barriers, pattern recognition systems, and microbial composition in early damage signaling requires further investigation. As such, this review highlights the innate immune response as a potential focus for research to better understand OM pathogenesis and development of interventions for patients treated with radiotherapy and chemotherapy. Future areas of evaluation include manipulation of microbial-mucosal interactions to alter cytotoxic sensitivity, use of germ-free models, and translation of innate immune-targeted agents interrogated for mucosal injury in other regions of the alimentary canal into OM-based clinical trials.
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Affiliation(s)
- Joanne Bowen
- School of Biomedicine, University of Adelaide, Adelaide 5005, Australia;
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Bruno JS, Al-Qadami GH, Laheij AMGA, Bossi P, Fregnani ER, Wardill HR. From Pathogenesis to Intervention: The Importance of the Microbiome in Oral Mucositis. Int J Mol Sci 2023; 24:ijms24098274. [PMID: 37175980 PMCID: PMC10179181 DOI: 10.3390/ijms24098274] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 04/11/2023] [Accepted: 04/24/2023] [Indexed: 05/15/2023] Open
Abstract
Oral mucositis (OM) is a common and impactful toxicity of standard cancer therapy, affecting up to 80% of patients. Its aetiology centres on the initial destruction of epithelial cells and the increase in inflammatory signals. These changes in the oral mucosa create a hostile environment for resident microbes, with oral infections co-occurring with OM, especially at sites of ulceration. Increasing evidence suggests that oral microbiome changes occur beyond opportunistic infection, with a growing appreciation for the potential role of the microbiome in OM development and severity. This review collects the latest articles indexed in the PubMed electronic database which analyse the bacterial shift through 16S rRNA gene sequencing methodology in cancer patients under treatment with oral mucositis. The aims are to assess whether changes in the oral and gut microbiome causally contribute to oral mucositis or if they are simply a consequence of the mucosal injury. Further, we explore the emerging role of a patient's microbial fingerprint in OM development and prediction. The maintenance of resident bacteria via microbial target therapy is under constant improvement and should be considered in the OM treatment.
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Affiliation(s)
- Julia S Bruno
- Instituto de Ensino e Pesquisa, Hospital Sírio-Libanês, São Paulo 01308-060, Brazil
| | - Ghanyah H Al-Qadami
- School of Biomedicine, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide 5005, Australia
| | - Alexa M G A Laheij
- Department of Oral Medicine, Academic Centre for Dentistry (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, 1081 LA Amsterdam, The Netherlands
- Department of Preventive Dentistry, Academic Centre for Dentistry (ACTA), University of Amsterdam and Vrije Universiteit Amsterdam, 1081 LA Amsterdam, The Netherlands
- Department of Oral Maxillofacial Surgery, Amsterdam UMC, University of Amsterdam, 1081 LA Amsterdam, The Netherlands
| | - Paolo Bossi
- Department of Medical and Surgical Specialties, Radiological Sciences and Public Health, University of Brescia, 25121 Brescia, Italy
| | - Eduardo R Fregnani
- Instituto de Ensino e Pesquisa, Hospital Sírio-Libanês, São Paulo 01308-060, Brazil
| | - Hannah R Wardill
- School of Biomedicine, Faculty of Health and Medical Sciences, University of Adelaide, Adelaide 5005, Australia
- The Supportive Oncology Research Group, Precision Cancer Medicine Theme, The South Australian Health and Medical Research Institute, Adelaide 5000, Australia
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Bruno JS, Heidrich V, Knebel FH, de Molla VC, Parahyba CJ, Miranda-Silva W, Asprino PF, Tucunduva L, Rocha V, Novis Y, Arrais-Rodrigues C, Camargo AA, Fregnani ER. Commensal oral microbiota impacts ulcerative oral mucositis clinical course in allogeneic stem cell transplant recipients. Sci Rep 2022; 12:17527. [PMID: 36266464 PMCID: PMC9584897 DOI: 10.1038/s41598-022-21775-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Accepted: 10/04/2022] [Indexed: 01/13/2023] Open
Abstract
Oral mucositis (OM) is a complex acute cytotoxicity of antineoplastic treatment that affects 40-85% of patients undergoing hematopoietic stem-cell transplantation. OM is associated with prolonged hospitalization, increased extensive pharmacotherapy, need for parenteral nutrition, and elevated treatment costs. As OM onset relates to the mucosal microenvironment status, with a particular role for microbiota-driven inflammation, we aimed to investigate whether the oral mucosa microbiota was associated with the clinical course of OM in patients undergoing allogeneic hematopoietic stem-cell transplantation. We collected oral mucosa samples from 30 patients and analyzed the oral mucosa microbiota by 16S rRNA sequencing. A total of 13 patients (43%) developed ulcerative OM. We observed that specific taxa were associated with oral mucositis grade and time to oral mucositis healing. Porphyromonas relative abundance at preconditioning was positively correlated with ulcerative OM grade (Spearman ρ = 0.61, P = 0.028) and higher Lactobacillus relative abundance at ulcerative OM onset was associated with shortened ulcerative OM duration (P = 0.032). Additionally, we generated a machine-learning-based bacterial signature that uses pre-treatment microbial profiles to predict whether a patient will develop OM during treatment. Our findings suggest that further research should focus on host-microbiome interactions to better prevent and treat OM.
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Affiliation(s)
- Julia S. Bruno
- grid.413471.40000 0000 9080 8521Centro de Oncologia Molecular, Hospital Sírio Libanês, Rua Prof. Daher Cutait, 69, São Paulo, SP Brazil
| | - Vitor Heidrich
- grid.413471.40000 0000 9080 8521Centro de Oncologia Molecular, Hospital Sírio Libanês, Rua Prof. Daher Cutait, 69, São Paulo, SP Brazil ,grid.11899.380000 0004 1937 0722Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, SP Brazil
| | - Franciele H. Knebel
- grid.413471.40000 0000 9080 8521Centro de Oncologia Molecular, Hospital Sírio Libanês, Rua Prof. Daher Cutait, 69, São Paulo, SP Brazil
| | | | - Claudia Joffily Parahyba
- grid.413471.40000 0000 9080 8521Centro de Oncologia, Hospital Sírio Libanês, São Paulo, SP Brazil
| | - Wanessa Miranda-Silva
- grid.413471.40000 0000 9080 8521Centro de Oncologia Molecular, Hospital Sírio Libanês, Rua Prof. Daher Cutait, 69, São Paulo, SP Brazil
| | - Paula F. Asprino
- grid.413471.40000 0000 9080 8521Centro de Oncologia Molecular, Hospital Sírio Libanês, Rua Prof. Daher Cutait, 69, São Paulo, SP Brazil
| | - Luciana Tucunduva
- grid.413471.40000 0000 9080 8521Centro de Oncologia, Hospital Sírio Libanês, São Paulo, SP Brazil
| | - Vanderson Rocha
- grid.413471.40000 0000 9080 8521Centro de Oncologia, Hospital Sírio Libanês, São Paulo, SP Brazil ,grid.11899.380000 0004 1937 0722Hospital das Clínicas da Faculdade de Medicina, Universidade de São Paulo/ICESP, São Paulo, SP Brazil ,grid.415719.f0000 0004 0488 9484Churchill Hospital, NHS-BT, Oxford, UK
| | - Yana Novis
- grid.413471.40000 0000 9080 8521Centro de Oncologia, Hospital Sírio Libanês, São Paulo, SP Brazil
| | | | - Anamaria A. Camargo
- grid.413471.40000 0000 9080 8521Centro de Oncologia Molecular, Hospital Sírio Libanês, Rua Prof. Daher Cutait, 69, São Paulo, SP Brazil
| | - Eduardo R. Fregnani
- grid.413471.40000 0000 9080 8521Centro de Oncologia Molecular, Hospital Sírio Libanês, Rua Prof. Daher Cutait, 69, São Paulo, SP Brazil
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Long-Term Analysis of Resilience of the Oral Microbiome in Allogeneic Stem Cell Transplant Recipients. Microorganisms 2022; 10:microorganisms10040734. [PMID: 35456787 PMCID: PMC9030553 DOI: 10.3390/microorganisms10040734] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 03/24/2022] [Accepted: 03/25/2022] [Indexed: 02/01/2023] Open
Abstract
Stem cell transplantation (SCT) is associated with oral microbial dysbiosis. However, long-term longitudinal data are lacking. Therefore, this study aimed to longitudinally assess the oral microbiome in SCT patients and to determine if changes are associated with oral mucositis and oral chronic graft-versus-host disease. Fifty allogeneic SCT recipients treated in two Dutch university hospitals were prospectively followed, starting at pre-SCT, weekly during hospitalization, and at 3, 6, 12, and 18 months after SCT. Oral rinsing samples were taken, and oral mucositis (WHO score) and oral chronic graft-versus-host disease (NIH score) were assessed. The oral microbiome diversity (Shannon index) and composition significantly changed after SCT and returned to pre-treatment levels from 3 months after SCT. Oral mucositis was associated with a more pronounced decrease in microbial diversity and with several disease-associated genera, such as Mycobacterium, Staphylococcus, and Enterococcus. On the other hand, microbiome diversity and composition were not associated with oral chronic graft-versus-host disease. To conclude, dysbiosis of the oral microbiome occurred directly after SCT but recovered after 3 months. Diversity and composition were related to oral mucositis but not to oral chronic graft-versus-host disease.
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Al-Qadami G, Van Sebille Y, Bowen J, Wardill H. Oral-Gut Microbiome Axis in the Pathogenesis of Cancer Treatment-Induced Oral Mucositis. FRONTIERS IN ORAL HEALTH 2022; 3:881949. [PMID: 35419563 PMCID: PMC8996059 DOI: 10.3389/froh.2022.881949] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 03/07/2022] [Indexed: 11/13/2022] Open
Abstract
Oral mucositis (OM) is one of the most common and debilitating oral complications of cancer treatments including chemotherapy, radiotherapy, and hematopoietic stem cell transplantation. It is associated with severe pain and difficulties in chewing, swallowing, and speech. This leads to impairment of basic oral functions and could result in unplanned treatment interruption or modification. As such, OM negatively impacts both patients' quality of life as well as tumor prognostic outcomes. Understanding pathways underlying OM pathogenesis help identify new targets for intervention or prevention. The pathophysiology of OM has been widely studied over past decades with several pathways related to oxidative stress, inflammation, and molecular and cellular signaling being implicated. In this mini-review, we will discuss the emerging role of the oral-gut microbiome axis in the development of OM. Particularly, we will elaborate on how the alterations in the oral and gut microbiota as well as intestinal dysfunction caused by cancer treatments could contribute to the pathogenesis of OM. Further, we will briefly discuss the potential methods for targeting the oral-gut microbiome axis to improve OM outcomes.
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Affiliation(s)
- Ghanyah Al-Qadami
- School of Biomedicine, University of Adelaide, Adelaide, SA, Australia
| | | | - Joanne Bowen
- School of Biomedicine, University of Adelaide, Adelaide, SA, Australia
| | - Hannah Wardill
- School of Biomedicine, University of Adelaide, Adelaide, SA, Australia
- Precision Medicine Theme (Cancer), South Australian Health and Medical Research Institute, Adelaide, SA, Australia
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