Ignite Creation Date:
2025-12-25 @ 12:05 AM
Ignite Modification Date:
2025-12-25 @ 10:04 PM
Study NCT ID:
NCT03236558
Status:
WITHDRAWN
Last Update Posted:
2020-04-01
First Post:
2017-07-28
Is NOT Gene Therapy:
True
Has Adverse Events:
False
Brief Title:
The Role of the Thymus in Type I Diabetes.
Sponsor:
Organization:
Raw JSON
{'hasResults': False, 'derivedSection': {'miscInfoModule': {'versionHolder': '2025-12-24'}, 'conditionBrowseModule': {'meshes': [{'id': 'D003922', 'term': 'Diabetes Mellitus, Type 1'}], 'ancestors': [{'id': 'D003920', 'term': 'Diabetes Mellitus'}, {'id': 'D044882', 'term': 'Glucose Metabolism Disorders'}, {'id': 'D008659', 'term': 'Metabolic Diseases'}, {'id': 'D009750', 'term': 'Nutritional and Metabolic Diseases'}, {'id': 'D004700', 'term': 'Endocrine System Diseases'}, {'id': 'D001327', 'term': 'Autoimmune Diseases'}, {'id': 'D007154', 'term': 'Immune System Diseases'}]}, 'interventionBrowseModule': {'meshes': [{'id': 'D001800', 'term': 'Blood Specimen Collection'}], 'ancestors': [{'id': 'D013048', 'term': 'Specimen Handling'}, {'id': 'D019411', 'term': 'Clinical Laboratory Techniques'}, {'id': 'D019937', 'term': 'Diagnostic Techniques and Procedures'}, {'id': 'D003933', 'term': 'Diagnosis'}, {'id': 'D011677', 'term': 'Punctures'}, {'id': 'D013514', 'term': 'Surgical Procedures, Operative'}, {'id': 'D008919', 'term': 'Investigative Techniques'}]}}, 'protocolSection': {'designModule': {'phases': ['NA'], 'studyType': 'INTERVENTIONAL', 'designInfo': {'allocation': 'NA', 'maskingInfo': {'masking': 'NONE'}, 'primaryPurpose': 'BASIC_SCIENCE', 'interventionModel': 'SINGLE_GROUP'}, 'enrollmentInfo': {'type': 'ACTUAL', 'count': 0}}, 'statusModule': {'whyStopped': 'lack of Financial support', 'overallStatus': 'WITHDRAWN', 'startDateStruct': {'date': '2018-03', 'type': 'ESTIMATED'}, 'expandedAccessInfo': {'hasExpandedAccess': False}, 'statusVerifiedDate': '2020-03', 'completionDateStruct': {'date': '2019-03', 'type': 'ESTIMATED'}, 'lastUpdateSubmitDate': '2020-03-30', 'studyFirstSubmitDate': '2017-07-28', 'studyFirstSubmitQcDate': '2017-07-28', 'lastUpdatePostDateStruct': {'date': '2020-04-01', 'type': 'ACTUAL'}, 'studyFirstPostDateStruct': {'date': '2017-08-02', 'type': 'ACTUAL'}, 'primaryCompletionDateStruct': {'date': '2019-03', 'type': 'ESTIMATED'}}, 'outcomesModule': {'primaryOutcomes': [{'measure': "Variability of the diversity of antigen-receptors' repertoires, expressed by regulatory T cells from type I diabetes patients and healthy controls.", 'timeFrame': 'Day 1', 'description': "Treg from the pediatric patients and the control subjects' blood will be isolated by cytometry, the messenger ribonucleic acid (mRNA) of these cells will be isolated, and the analysis of the alpha and beta chains of the TCRs will be carried out by high-throughput sequencing."}], 'secondaryOutcomes': [{'measure': 'Ratio between TCR diversities expressed by Treg cells vs. conventional T cells.', 'timeFrame': 'Day 1', 'description': "Treg from the pediatric patients and the control subjects' blood will be isolated by cytometry, the mRNA of these cells will be isolated, and the analysis of the alpha and beta chains of the TCRs will be carried out by high-throughput sequencing."}]}, 'oversightModule': {'oversightHasDmc': False, 'isFdaRegulatedDrug': False, 'isFdaRegulatedDevice': False}, 'conditionsModule': {'keywords': ['Type 1 diabetes', 'Juvenile diabetes', 'Immune-tolerance', 'Regulatory T lymphocyte', 'Treg', 'TCR', 'Repertoire'], 'conditions': ['Type1 Diabetes']}, 'referencesModule': {'references': [{'pmid': '19359477', 'type': 'BACKGROUND', 'citation': 'Ferreira C, Singh Y, Furmanski AL, Wong FS, Garden OA, Dyson J. Non-obese diabetic mice select a low-diversity repertoire of natural regulatory T cells. Proc Natl Acad Sci U S A. 2009 May 19;106(20):8320-5. doi: 10.1073/pnas.0808493106. Epub 2009 Apr 9.'}, {'pmid': '25939024', 'type': 'BACKGROUND', 'citation': 'Thiault N, Darrigues J, Adoue V, Gros M, Binet B, Perals C, Leobon B, Fazilleau N, Joffre OP, Robey EA, van Meerwijk JP, Romagnoli P. Peripheral regulatory T lymphocytes recirculating to the thymus suppress the development of their precursors. Nat Immunol. 2015 Jun;16(6):628-34. doi: 10.1038/ni.3150. Epub 2015 May 4.'}, {'pmid': '11027449', 'type': 'BACKGROUND', 'citation': 'Steffens CM, Al-Harthi L, Shott S, Yogev R, Landay A. Evaluation of thymopoiesis using T cell receptor excision circles (TRECs): differential correlation between adult and pediatric TRECs and naive phenotypes. Clin Immunol. 2000 Nov;97(2):95-101. doi: 10.1006/clim.2000.4938.'}, {'pmid': '21952680', 'type': 'BACKGROUND', 'citation': 'Calder AE, Hince MN, Dudakov JA, Chidgey AP, Boyd RL. Thymic involution: where endocrinology meets immunology. Neuroimmunomodulation. 2011;18(5):281-9. doi: 10.1159/000329496. Epub 2011 Sep 22.'}, {'pmid': '20559327', 'type': 'BACKGROUND', 'citation': 'Sakaguchi S, Miyara M, Costantino CM, Hafler DA. FOXP3+ regulatory T cells in the human immune system. Nat Rev Immunol. 2010 Jul;10(7):490-500. doi: 10.1038/nri2785. Epub 2010 Jun 18.'}, {'pmid': '15189396', 'type': 'BACKGROUND', 'citation': 'Lancaster GA, Dodd S, Williamson PR. Design and analysis of pilot studies: recommendations for good practice. J Eval Clin Pract. 2004 May;10(2):307-12. doi: 10.1111/j..2002.384.doc.x.'}]}, 'descriptionModule': {'briefSummary': 'Regulatory T lymphocytes play a major role in the protection from autoimmune pathology. Defects in immunosuppression mediated by these cells is therefore suspected to contribute to these diseases. This issue has very little been studied in humans.Regulatory T cells emigrated from the thymus will be isolated from the blood of patients and healthy controls. The repertoire of antigen-receptors will be analysed by high throughput sequencing and its diversity estimated using appropriate statistical models borrowed from ecology.', 'detailedDescription': 'In the thymus of an animal model of type I diabetes, the population of regulatory T cells expresses a repertoire of antigen receptors that is approximately ten-fold less diverse than that found in mice resistant to autoimmune pathology. Genetic models later showed that this reduced diversity was involved in the susceptibility to diabetes. Researchers study the diversity of the TCR expressed by regulatory T cells from paediatric type I diabetes patients and controls. Regulatory T cells emigrated from the thymus will be isolated from the blood of patients and healthy controls. The repertoire of antigen-receptors will be analysed by high throughput sequencing and its diversity estimated using appropriate statistical models borrowed from ecology.'}, 'eligibilityModule': {'sex': 'ALL', 'stdAges': ['CHILD'], 'maximumAge': '12 Years', 'minimumAge': '6 Years', 'healthyVolunteers': True, 'eligibilityCriteria': 'Inclusion Criteria:\n\n* type I diabetes patient\n* having at least one age-matched sibling (healthy control)\n\nExclusion Criteria:\n\n* other immunopathology\n* treatment with any anti-inflammatory or immunosuppressive drugs\n* puberty\n* legal protection'}, 'identificationModule': {'nctId': 'NCT03236558', 'acronym': 'TregDiab', 'briefTitle': 'The Role of the Thymus in Type I Diabetes.', 'organization': {'class': 'OTHER', 'fullName': 'University Hospital, Toulouse'}, 'officialTitle': 'Thymic Generation of Regulatory T Lymphocytes in Type I Diabetes Patients.', 'orgStudyIdInfo': {'id': 'RC31/16/8254'}}, 'armsInterventionsModule': {'armGroups': [{'type': 'EXPERIMENTAL', 'label': 'Patients with diabetes', 'description': 'T1D patients with blood collection', 'interventionNames': ['Procedure: Blood collection']}], 'interventions': [{'name': 'Blood collection', 'type': 'PROCEDURE', 'description': 'Ten cc of peripheral blood will be taken from patients and healthy controls as soon as possible after T1D diagnosis of the former.', 'armGroupLabels': ['Patients with diabetes']}]}, 'contactsLocationsModule': {'locations': [{'zip': '31059', 'city': 'Toulouse', 'state': 'Midi-Pyrénées', 'country': 'France', 'facility': 'CHU de Toulouse', 'geoPoint': {'lat': 43.60426, 'lon': 1.44367}}], 'overallOfficials': [{'name': 'Claire Le Tallec, MD', 'role': 'PRINCIPAL_INVESTIGATOR', 'affiliation': 'University Hospital, Toulouse'}]}, 'sponsorCollaboratorsModule': {'leadSponsor': {'name': 'University Hospital, Toulouse', 'class': 'OTHER'}, 'collaborators': [{'name': 'Institut National de la Santé Et de la Recherche Médicale, France', 'class': 'OTHER_GOV'}, {'name': 'Centre National de la Recherche Scientifique, France', 'class': 'OTHER'}], 'responsibleParty': {'type': 'SPONSOR'}}}}