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Cocito C, Branchtein M, Gongora T, Dahmane N, Greenfield J. HGG-41. CHARACTERIZATION OF THE IMMUNE RESPONSE FOLLOWING VARIOUS RADIOTHERAPY TREATMENTS IN GLIOBLASTOMA. Neuro Oncol 2021. [PMCID: PMC8263153 DOI: 10.1093/neuonc/noab090.105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Malignant gliomas represent 6.5% of all childhood brain neoplasms with a 5-years survival rate of less than 20%. Current standard of care for these tumors include radiotherapy; recent data in solid tumors indicate that adequate radiation protocols may synergize with immunotherapy strategies for better outcomes. Nonetheless, a great discrepancy between preclinical studies and clinical trials outcomes persists, the basis of which is not fully understood. One hypothesis may be due to different radiation protocols used. We used the GL261 syngeneic mouse model of glioma to test this hypothesis and characterize the immune response to radiotherapy, with either a single dose of 10Gy, a dose often used in preclinical models, or a fractionated treatment of 2Gy for five consecutive days (2Gyx5), as fractioned radiotherapy is most often used in patients. The immune content of the brain and the blood was assessed by flow cytometry in un-irradiated (control), 10Gyx1 and 2Gyx5 treated mice for three weeks after radiation. In the brain, both radiation regimens drastically reduced the number of CD45+ cells for the first two weeks after treatment. When compared to controls, 10Gyx1 but not 2Gyx5 treated mice showed a significant increase in tumor infiltrating lymphocytes (CD3+) starting from the second week following treatment. This effect persisted until three weeks post treatment. The 10Gyx1 dose was better tolerated by the resident microglia (CD45lowCD11b+) when compared to the 2Gyx5 treatment. Our data describe the dynamics through which the immune microenvironment responds to two radiation regimens over time. Our results show that 10Gyx1 is the most effective regimen to impede tumor growth and to induce lymphocyte infiltration once the system recovers from the treatment. Our work suggests that, in the GL261 model, the fractionated radiation treatment we tested may be less optimal in priming glioma cells to the immune system.
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Cassius C, Branchtein M, Battistella M, Amode R, Lepelletier C, Jachiet M, de Masson A, Frumholtz L, Chasset F, Amoura Z, Mathian A, Samri A, Monfort JB, Bachmeyer C, Bengoufa D, Cordoliani F, Bagot M, Bensussan A, Bouaziz JD, Le Buanec H. Persistent deficiency of mucosal-associated invariant T cells during dermatomyositis. Rheumatology (Oxford) 2021; 59:2282-2286. [PMID: 31846040 DOI: 10.1093/rheumatology/kez564] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 10/22/2019] [Indexed: 12/31/2022] Open
Abstract
OBJECTIVES Mucosal-associated invariant T (MAIT) cells are innate-like lymphocytes that are important for antibacterial immunity and may have regulatory roles. MAIT cells are decreased during SLE. However, their frequencies and phenotype have not been investigated in DM. We studied MAIT cell frequencies and phenotype in DM patients with active and inactive disease (after treatment). METHODS Peripheral blood flow cytometry analysis of MAIT cells was compared between DM (n = 22), SLE (n = 10), psoriasis (n = 7) and atopic dermatitis (n = 5) patients, and healthy controls (n = 19). RESULTS A dramatic decrease of circulating MAIT cell frequency was observed in active DM and SLE patients compared with healthy controls and other inflammatory skin diseases [active DM: median = 0.25% (interquartile range 0.19-0.6%), P < 0.0001; active SLE: median = 0.61 (0.55-0.77), P < 0.0001 vs healthy controls: 2.32% (1.18-4.45%)]. MAIT cells from active DM patients had an abnormal phenotype including increased expression of CD25 and cytotoxic T-lymphocyte-associated protein 4 that correlated with their low frequency in the blood. CONCLUSION In DM, peripheral blood MAIT cells are dramatically reduced and have an activated/exhausted phenotype that may be linked to increased activation-induced cell death.
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Affiliation(s)
- Charles Cassius
- Université de Paris, Inserm U976 - HIPI Unit, Institut de Recherche Saint-Louis
- Dermatology Department, AP-HP, Hôpital Saint-Louis, Paris
- Université Catholique de Louvain, CHU UCL Namur, Godinne
- EMSED (etude des maladies systémiques en Dermatologie), Paris, France
| | - Mylene Branchtein
- Institut Jules Bordet, Université Libre de Belgique, Bruxelles, Belgium
| | - Maxime Battistella
- Université de Paris, Inserm U976 - HIPI Unit, Institut de Recherche Saint-Louis
- Pathology Department, AP-HP, Hôpital Saint-Louis
| | - Reyhan Amode
- Université de Paris, Inserm U976 - HIPI Unit, Institut de Recherche Saint-Louis
- Dermatology Department, AP-HP, Hôpital Saint-Louis, Paris
- EMSED (etude des maladies systémiques en Dermatologie), Paris, France
| | - Clémence Lepelletier
- Université de Paris, Inserm U976 - HIPI Unit, Institut de Recherche Saint-Louis
- Dermatology Department, AP-HP, Hôpital Saint-Louis, Paris
- EMSED (etude des maladies systémiques en Dermatologie), Paris, France
| | - Marie Jachiet
- Dermatology Department, AP-HP, Hôpital Saint-Louis, Paris
- EMSED (etude des maladies systémiques en Dermatologie), Paris, France
| | - Adèle de Masson
- Université de Paris, Inserm U976 - HIPI Unit, Institut de Recherche Saint-Louis
- Dermatology Department, AP-HP, Hôpital Saint-Louis, Paris
| | - Laure Frumholtz
- Dermatology Department, AP-HP, Hôpital Saint-Louis, Paris
- EMSED (etude des maladies systémiques en Dermatologie), Paris, France
| | - François Chasset
- EMSED (etude des maladies systémiques en Dermatologie), Paris, France
- Dermatology Department, AP-HP, Hôpital Tenon
- Sorbonne Université, Faculté de médecine sorbonne université, Paris
| | - Zahir Amoura
- Groupement Hospitalier Pitié-Salpétrère, AP-HP, French National Referral Center for Systemic Lupus Erythematosus, Antiphospholipid Antibody Syndrome and Other Autoimmune Disorders, Service de Mé decine Interne 2, Institut E3M, Inserm UMRS, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris)
| | - Alexis Mathian
- Groupement Hospitalier Pitié-Salpétrère, AP-HP, French National Referral Center for Systemic Lupus Erythematosus, Antiphospholipid Antibody Syndrome and Other Autoimmune Disorders, Service de Mé decine Interne 2, Institut E3M, Inserm UMRS, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris)
| | - Assia Samri
- Groupement Hospitalier Pitié-Salpétrère, AP-HP, French National Referral Center for Systemic Lupus Erythematosus, Antiphospholipid Antibody Syndrome and Other Autoimmune Disorders, Service de Mé decine Interne 2, Institut E3M, Inserm UMRS, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris)
| | | | | | | | | | - Martine Bagot
- Université de Paris, Inserm U976 - HIPI Unit, Institut de Recherche Saint-Louis
- Dermatology Department, AP-HP, Hôpital Saint-Louis, Paris
| | - Armand Bensussan
- Université de Paris, Inserm U976 - HIPI Unit, Institut de Recherche Saint-Louis
| | - Jean-David Bouaziz
- Université de Paris, Inserm U976 - HIPI Unit, Institut de Recherche Saint-Louis
- Dermatology Department, AP-HP, Hôpital Saint-Louis, Paris
- EMSED (etude des maladies systémiques en Dermatologie), Paris, France
| | - Hélène Le Buanec
- Université de Paris, Inserm U976 - HIPI Unit, Institut de Recherche Saint-Louis
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Cassius C, Branchtein M, Battistella M, Lepelletier C, Jachiet M, De Masson A, Frulholtz L, Chasset F, Amoura Z, Mathian A, Monfort JB, Bachmeyer C, Cordoliani F, Bengoufa D, Bensussan A, Bagot M, Le Buanec H, Bouaziz JD. Déficit persistant des cellules MAIT au cours de la dermatomyosite. Ann Dermatol Venereol 2020. [DOI: 10.1016/j.annder.2020.09.074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Cassius C, Jachiet M, Branchtein M, Dubanchet S, Bagot M, Baroudjian B, Salle de Chou C, Gottlieb J, Battistella M, Bensussan A, Bouaziz JD, Le Buanec H. Modifications lymphocytaires T dans la dermatomyosite amyopathique. Ann Dermatol Venereol 2016. [DOI: 10.1016/j.annder.2016.09.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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