Ignite Creation Date:
2025-12-25 @ 12:19 AM
Ignite Modification Date:
2026-02-23 @ 1:11 AM
Study NCT ID:
NCT06431958
Status:
ACTIVE_NOT_RECRUITING
Last Update Posted:
2024-08-09
First Post:
2024-05-22
Is NOT Gene Therapy:
True
Has Adverse Events:
False
Brief Title:
Droplet Digital PCR and PCR-free BIOSensors for the Detection of Resistance-associated SNPs in Pneumocystis Jirovecii
Sponsor:
Organization:
Raw JSON
{'hasResults': False, 'derivedSection': {'miscInfoModule': {'versionHolder': '2025-12-24'}, 'conditionBrowseModule': {'meshes': [{'id': 'D011020', 'term': 'Pneumonia, Pneumocystis'}], 'ancestors': [{'id': 'D008172', 'term': 'Lung Diseases, Fungal'}, {'id': 'D009181', 'term': 'Mycoses'}, {'id': 'D001423', 'term': 'Bacterial Infections and Mycoses'}, {'id': 'D007239', 'term': 'Infections'}, {'id': 'D016720', 'term': 'Pneumocystis Infections'}, {'id': 'D012141', 'term': 'Respiratory Tract Infections'}, {'id': 'D011014', 'term': 'Pneumonia'}, {'id': 'D008171', 'term': 'Lung Diseases'}, {'id': 'D012140', 'term': 'Respiratory Tract Diseases'}]}}, 'protocolSection': {'designModule': {'studyType': 'OBSERVATIONAL', 'designInfo': {'timePerspective': 'RETROSPECTIVE', 'observationalModel': 'CASE_ONLY'}, 'enrollmentInfo': {'type': 'ESTIMATED', 'count': 300}, 'patientRegistry': False}, 'statusModule': {'overallStatus': 'ACTIVE_NOT_RECRUITING', 'startDateStruct': {'date': '2024-06-01', 'type': 'ACTUAL'}, 'expandedAccessInfo': {'hasExpandedAccess': False}, 'statusVerifiedDate': '2024-04', 'completionDateStruct': {'date': '2026-12-31', 'type': 'ESTIMATED'}, 'lastUpdateSubmitDate': '2024-08-08', 'studyFirstSubmitDate': '2024-05-22', 'studyFirstSubmitQcDate': '2024-05-22', 'lastUpdatePostDateStruct': {'date': '2024-08-09', 'type': 'ACTUAL'}, 'studyFirstPostDateStruct': {'date': '2024-05-29', 'type': 'ACTUAL'}, 'primaryCompletionDateStruct': {'date': '2026-12-31', 'type': 'ESTIMATED'}}, 'outcomesModule': {'otherOutcomes': [{'measure': 'to determine the impact of mutations on the effectiveness of anti-Pneumocystis treatment (e.g. favorable vs. unfavorable evolution of the infection)', 'timeFrame': '1 month and 3 month'}, {'measure': 'to evaluate two methods - digital droplet PCR and biosensors without PCR - for the detection and characterization of mutations associated with resistance in Pneumocystis jirovecii', 'timeFrame': 'at inclusion'}], 'primaryOutcomes': [{'measure': 'Presence of specific strains of Pneumocystis jirovecii potentially resistant to treatments in patients infected with this fungus', 'timeFrame': 'at inclusion', 'description': "Four genes encoding therapeutic targets such as dihydropteroate synthase (DHPS), dihydrofolate reductase (DHFR), cytochrome b (CYB), inosine-5'-monophosphate dehydrogenase (IMPDH) will be amplified and sequenced to detect single nucleotide polymorphisms (Single Nucleotide Polymorphism, SNP), in particular those potentially linked to resistance to anti-Pneumocystis treatments."}], 'secondaryOutcomes': [{'measure': 'to determine the factors associated (e.g. exposure to treatments) with P. jirovecii mutant strains', 'timeFrame': 'at inclusion'}]}, 'oversightModule': {'oversightHasDmc': False, 'isFdaRegulatedDrug': False, 'isFdaRegulatedDevice': False}, 'conditionsModule': {'keywords': ['Pneumocystis jirovecii', 'mutant', 'anti-microbial resistance', 'DHPS', 'DHFR', 'Cytochrome b', 'IMPDH'], 'conditions': ['Pneumocystis Pneumonia']}, 'referencesModule': {'references': [{'pmid': '34682270', 'type': 'RESULT', 'citation': "Hoffmann CV, Nevez G, Moal MC, Quinio D, Le Nan N, Papon N, Bouchara JP, Le Meur Y, Le Gal S. Selection of Pneumocystis jirovecii Inosine 5'-Monophosphate Dehydrogenase Mutants in Solid Organ Transplant Recipients: Implication of Mycophenolic Acid. J Fungi (Basel). 2021 Oct 10;7(10):849. doi: 10.3390/jof7100849."}, {'pmid': '29514207', 'type': 'RESULT', 'citation': 'Argy N, Le Gal S, Coppee R, Song Z, Vindrios W, Massias L, Kao WC, Hunte C, Yazdanpanah Y, Lucet JC, Houze S, Clain J, Nevez G. Pneumocystis Cytochrome b Mutants Associated With Atovaquone Prophylaxis Failure as the Cause of Pneumocystis Infection Outbreak Among Heart Transplant Recipients. Clin Infect Dis. 2018 Aug 31;67(6):913-919. doi: 10.1093/cid/ciy154.'}, {'pmid': '37656874', 'type': 'RESULT', 'citation': 'Bonnet PL, Hoffmann CV, Le Nan N, Bellamy L, Hoarau G, Flori P, Demar M, Argy N, Morio F, Le Gal S, Nevez G. Atovaquone exposure and Pneumocystis jirovecii cytochrome b mutations: French data and review of the literature. Med Mycol. 2023 Sep 4;61(9):myad095. doi: 10.1093/mmy/myad095.'}, {'pmid': '34682277', 'type': 'RESULT', 'citation': 'de la Horra C, Friaza V, Morilla R, Delgado J, Medrano FJ, Miller RF, de Armas Y, Calderon EJ. Update on Dihydropteroate Synthase (DHPS) Mutations in Pneumocystis jirovecii. J Fungi (Basel). 2021 Oct 13;7(10):856. doi: 10.3390/jof7100856.'}, {'pmid': '15504856', 'type': 'RESULT', 'citation': 'Nahimana A, Rabodonirina M, Bille J, Francioli P, Hauser PM. Mutations of Pneumocystis jirovecii dihydrofolate reductase associated with failure of prophylaxis. Antimicrob Agents Chemother. 2004 Nov;48(11):4301-5. doi: 10.1128/AAC.48.11.4301-4305.2004.'}, {'pmid': '33538349', 'type': 'RESULT', 'citation': 'Kojabad AA, Farzanehpour M, Galeh HEG, Dorostkar R, Jafarpour A, Bolandian M, Nodooshan MM. Droplet digital PCR of viral DNA/RNA, current progress, challenges, and future perspectives. J Med Virol. 2021 Jul;93(7):4182-4197. doi: 10.1002/jmv.26846. Epub 2021 Mar 11.'}, {'pmid': '33213011', 'type': 'RESULT', 'citation': 'Pla L, Avino A, Eritja R, Ruiz-Gaitan A, Peman J, Friaza V, Calderon EJ, Aznar E, Martinez-Manez R, Santiago-Felipe S. Triplex Hybridization-Based Nanosystem for the Rapid Screening of Pneumocystis Pneumonia in Clinical Samples. J Fungi (Basel). 2020 Nov 17;6(4):292. doi: 10.3390/jof6040292.'}]}, 'descriptionModule': {'briefSummary': "The main objective of the proposed research is to identify Pneumocystis jirovecii mutant strains on 4 genes encoding therapeutic targets such as dihydropteroate synthase (DHPS), dihydrofolate reductase (DHFR), cytochrome b (CYB), inosine-5'-monophosphate dehydrogenase (IMPDH) and therefore to assess the prevalence of potentially resistant strains in patients infected with P. jirovecii.", 'detailedDescription': "Pneumocystis jirovecii (P. jirovecii) is an opportunistic pathogenic fungus responsible for pulmonary infection or Pneumocystis pneumonia (PCP) in immunocompromised patients. There is currently no system for its in vitro culture. The diagnostic methods used are mainly based on molecular biology techniques which also allow the detection and analysis of single nucleotide polymorphisms (SNPs), particularly at the level of genes coding for the targets of molecules widely used in the prevention and treatment of PCP. These SNPs may represent missense mutations potentially associated with treatment resistance. They may result from exposure of patients to these treatments before the development of P. jirovecii infection. However, data concerning the prevalence of these mutations remains scarce, particularly in France. Methods for detecting these mutations based on PCR followed by DNA sequencing have limitations in terms of sensitivity. The evaluation of new, more sensitive and rapid tools for the detection and characterization of pathogens in this context is necessary.\n\nThe main objective of the proposed research is to identify P. jirovecii mutant strains on 4 genes encoding therapeutic targets such as dihydropteroate synthase (DHPS), dihydrofolate reductase (DHFR), cytochrome b (CYB), inosine-5'-monophosphate dehydrogenase (IMPDH) and therefore to assess the prevalence of potentially resistant strains in patients infected with P. jirovecii.\n\nThe secondary objectives are:\n\n* to determine the factors associated (e.g. exposure to treatments) with mutant P. jirovecii strains\n* to determine the impact of mutations on the effectiveness of anti-Pneumocystis treatment (e.g. favorable vs. unfavorable evolution of the infection)\n* to evaluate two methods - digital droplet PCR and biosensors without PCR - for the detection and characterization of mutations associated with resistance in Pneumocystis jirovecii"}, 'eligibilityModule': {'sex': 'ALL', 'stdAges': ['CHILD', 'ADULT', 'OLDER_ADULT'], 'samplingMethod': 'NON_PROBABILITY_SAMPLE', 'studyPopulation': 'Patients in whom P. jirovecii was detected in a pulmonary sample (bronchoalveolar lavage, sputum, bronchial aspiration, oropharyngeal rinse, nasopharyngeal sample) can be included in the study', 'healthyVolunteers': False, 'eligibilityCriteria': 'Inclusion Criteria:\n\n* Patients in whom P. jirovecii was detected in a pulmonary sample (bronchoalveolar lavage, sputum, bronchial aspiration, oropharyngeal rinse, nasopharyngeal sample)\n* No opposition\n* Patient affiliated to a social security system\n\nExclusion Criteria:\n\n* Patients under legal protection (guardianship, curatorship)\n* Refusal to participate'}, 'identificationModule': {'nctId': 'NCT06431958', 'acronym': 'DDBIOS', 'briefTitle': 'Droplet Digital PCR and PCR-free BIOSensors for the Detection of Resistance-associated SNPs in Pneumocystis Jirovecii', 'organization': {'class': 'OTHER', 'fullName': 'University Hospital, Brest'}, 'officialTitle': 'Droplet Digital PCR and PCR-free BIOSensors for the Detection of Resistance-associated SNPs in Pneumocystis Jirovecii', 'orgStudyIdInfo': {'id': '29BRC24.0085 - DDBIOS'}}, 'contactsLocationsModule': {'locations': [{'zip': '29609', 'city': 'Brest', 'country': 'France', 'facility': 'Chu Brest', 'geoPoint': {'lat': 48.39029, 'lon': -4.48628}}]}, 'ipdSharingStatementModule': {'infoTypes': ['STUDY_PROTOCOL'], 'timeFrame': 'Data will be available beginning three years and ending fifteen years following the final study report completion', 'ipdSharing': 'YES', 'description': 'All collected data that underlie results in a publication', 'accessCriteria': 'Data access requests will be reviewed by the internal committee of Brest UH. Requestors will be required to sign and complete a data access agreement'}, 'sponsorCollaboratorsModule': {'leadSponsor': {'name': 'University Hospital, Brest', 'class': 'OTHER'}, 'responsibleParty': {'type': 'SPONSOR'}}}}