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Topham B, de Vries M, Nonis M, van Berkel R, Pullar JM, Magon NJ, Vissers MCM, Currie MJ, Robinson BA, Gibbs D, Ang A, Dachs GU. Blood Vitamin C Levels of Patients Receiving Immunotherapy and Relationship to Monocyte Subtype and Epigenetic Modification. EPIGENOMES 2024; 8:17. [PMID: 38804366 PMCID: PMC11130941 DOI: 10.3390/epigenomes8020017] [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: 02/19/2024] [Revised: 04/26/2024] [Accepted: 04/26/2024] [Indexed: 05/29/2024] Open
Abstract
The treatment of metastatic melanoma has been revolutionised by immunotherapy, yet a significant number of patients do not respond, and many experience autoimmune adverse events. Associations have been reported between patient outcome and monocyte subsets, whereas vitamin C (ascorbate) has been shown to mediate changes in cancer-stimulated monocytes in vitro. We therefore investigated the relationship of ascorbate with monocyte subsets and epigenetic modifications in patients with metastatic melanoma receiving immunotherapy. Patients receiving immunotherapy were compared to other cancer cohorts and age-matched healthy controls. Ascorbate levels in plasma and peripheral blood-derived mononuclear cells (PBMCs), monocyte subtype and epigenetic markers were measured, and adverse events, tumour response and survival were recorded. A quarter of the immunotherapy cohort had hypovitaminosis C, with plasma and PBMC ascorbate levels significantly lower than those from other cancer patients or healthy controls. PBMCs from the immunotherapy cohort contained similar frequencies of non-classical and classical monocytes. DNA methylation markers and intracellular ascorbate concentration were correlated with monocyte subset frequency in healthy controls, but correlation was lost in immunotherapy patients. No associations between ascorbate status and immune-related adverse events or tumour response or overall survival were apparent.
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Affiliation(s)
- Ben Topham
- Mackenzie Cancer Research Group, Department of Pathology and Biomedical Science, University of Otago Christchurch, Christchurch 8011, New Zealand; (B.T.); (M.J.C.); (B.A.R.); (A.A.)
| | - Millie de Vries
- Mackenzie Cancer Research Group, Department of Pathology and Biomedical Science, University of Otago Christchurch, Christchurch 8011, New Zealand; (B.T.); (M.J.C.); (B.A.R.); (A.A.)
| | - Maria Nonis
- Mackenzie Cancer Research Group, Department of Pathology and Biomedical Science, University of Otago Christchurch, Christchurch 8011, New Zealand; (B.T.); (M.J.C.); (B.A.R.); (A.A.)
| | - Rebecca van Berkel
- Mackenzie Cancer Research Group, Department of Pathology and Biomedical Science, University of Otago Christchurch, Christchurch 8011, New Zealand; (B.T.); (M.J.C.); (B.A.R.); (A.A.)
| | - Juliet M. Pullar
- Mātai Hāora—Centre for Redox Biology and Medicine, Department of Pathology and Biomedical Science, University of Otago Christchurch, Christchurch 8011, New Zealand; (J.M.P.); (M.C.M.V.)
| | - Nicholas J. Magon
- Mātai Hāora—Centre for Redox Biology and Medicine, Department of Pathology and Biomedical Science, University of Otago Christchurch, Christchurch 8011, New Zealand; (J.M.P.); (M.C.M.V.)
| | - Margreet C. M. Vissers
- Mātai Hāora—Centre for Redox Biology and Medicine, Department of Pathology and Biomedical Science, University of Otago Christchurch, Christchurch 8011, New Zealand; (J.M.P.); (M.C.M.V.)
| | - Margaret J. Currie
- Mackenzie Cancer Research Group, Department of Pathology and Biomedical Science, University of Otago Christchurch, Christchurch 8011, New Zealand; (B.T.); (M.J.C.); (B.A.R.); (A.A.)
| | - Bridget A. Robinson
- Mackenzie Cancer Research Group, Department of Pathology and Biomedical Science, University of Otago Christchurch, Christchurch 8011, New Zealand; (B.T.); (M.J.C.); (B.A.R.); (A.A.)
- Canterbury Regional Cancer and Haematology Service, Te Whatu Ora Waitaha, Canterbury, Christchurch 8011, New Zealand
| | - David Gibbs
- Canterbury Regional Cancer and Haematology Service, Te Whatu Ora Waitaha, Canterbury, Christchurch 8011, New Zealand
| | - Abel Ang
- Mackenzie Cancer Research Group, Department of Pathology and Biomedical Science, University of Otago Christchurch, Christchurch 8011, New Zealand; (B.T.); (M.J.C.); (B.A.R.); (A.A.)
- Division of Cellular Medicine, School of Medicine, University of Dundee, Dundee DD1 4HN, UK
| | - Gabi U. Dachs
- Mackenzie Cancer Research Group, Department of Pathology and Biomedical Science, University of Otago Christchurch, Christchurch 8011, New Zealand; (B.T.); (M.J.C.); (B.A.R.); (A.A.)
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Zhong C, Si Y, Yang H, Zhou C, Chen Y, Wang C, Liu Y, Chen C, Shi H, Lai X, Tang H. Identification of monocyte-associated pathways participated in the pathogenesis of pulmonary arterial hypertension based on omics-data. Pulm Circ 2023; 13:e12319. [PMID: 38130888 PMCID: PMC10733707 DOI: 10.1002/pul2.12319] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2023] [Revised: 10/23/2023] [Accepted: 11/21/2023] [Indexed: 12/23/2023] Open
Abstract
Pulmonary arterial hypertension (PAH) is one kind of chronic and uncurable diseases that can cause heart failure. Immune microenvironment plays a significant role in PAH. The aim of this study was to assess the role of immune cell infiltration in the pathogenesis of PAH. Differentially expressed genes based on microarray data were enriched in several immune-related pathways. To evaluate the immune cell infiltration, based on the microarray data sets in the GEO database, we used both ssGSEA and the CIBERSORT algorithm. Additionally, single-cell RNA sequencing (scRNA-seq) data was used to further explicit the specific role and intercellular communications. Then receiver operating characteristic curves and least absolute shrinkage and selection operator were used to discover and test the potential diagnostic biomarkers for PAH. Both the immune cell infiltration analyses based on the microarray data sets and the cell proportion in scRNA-seq data exhibited a significant downregulation in the infiltration of monocytes in PAH. Then, the intercellular communications showed that the interaction weighs of most immune cells, including monocytes changed between the control and PAH groups, and the ITGAL-ITGB2 and ICAM signaling pathways played critical roles in this process. In addition, ITGAM and ICAM2 displayed good diagnosis values in PAH. This study implicated that the change of monocyte was one of the key immunologic features of PAH. Monocyte-associated ICAM-1 and ITGAL-ITGB2 signaling pathways might be involved in the pathogenesis of PAH.
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Affiliation(s)
- Caiming Zhong
- Department of Respiratory and Critical Care Medicine, Shanghai Changzheng HospitalNaval Medical UniversityShanghaiChina
- Department of Respiratory and Critical Care Medicine, Shanghai Changhai HospitalNaval Medical UniversityShanghaiChina
| | - Yachen Si
- Department of Nephrology, Shanghai Changhai HospitalNaval Medical UniversityShanghaiChina
| | - Huanhuan Yang
- Department of Respiratory and Critical Care Medicine, Shanghai Changzheng HospitalNaval Medical UniversityShanghaiChina
| | - Chao Zhou
- Department of Respiratory and Critical Care Medicine, Shanghai Changzheng HospitalNaval Medical UniversityShanghaiChina
| | - Yang Chen
- Department of Respiratory and Critical Care Medicine, Shanghai Changzheng HospitalNaval Medical UniversityShanghaiChina
| | - Chen Wang
- Department of Respiratory and Critical Care Medicine, Shanghai Changzheng HospitalNaval Medical UniversityShanghaiChina
| | - Yalong Liu
- Department of Respiratory and Critical Care Medicine, Shanghai Changzheng HospitalNaval Medical UniversityShanghaiChina
| | - Cheng Chen
- Department of Respiratory and Critical Care Medicine, Shanghai Changzheng HospitalNaval Medical UniversityShanghaiChina
| | - Hui Shi
- Department of Respiratory and Critical Care Medicine, Shanghai Changhai HospitalNaval Medical UniversityShanghaiChina
| | - Xueli Lai
- Department of Nephrology, Shanghai Changhai HospitalNaval Medical UniversityShanghaiChina
| | - Hao Tang
- Department of Respiratory and Critical Care Medicine, Shanghai Changzheng HospitalNaval Medical UniversityShanghaiChina
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