- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03869593
Role of the NLRP3 Inflammasome in Escherichia Coli and Staphylococcus Aureus Bacteria (NLRP3-Bact)
March 7, 2019 updated by: Centre Hospitalier Universitaire de Nice
Our previous studies delineate a novel pathway of immune activation in animals that the investigators have named Anti-Virulence Immunity (AVI).
Using a mice model of bacteremia, the investigators have demonstrated that Escherichia coli Cytotoxic Necrotizing Factor 1 (CNF1) activity is sensed by the immune system.
This immune sensing results in a rapid bacterial clearing during bacteremia triggered by uropathogenic E. coli-expressing CNF1.
The investigators already confirmed the involvement of one inflammasome using macrophages isolated from Knock-out mice.
The investigators have recently determined the conservation in human monocytes of the interleukin -1beta maturation triggered by CNF1 and observed the heterogeneous capacity of monocytes to respond to the CNF1 treatment depending on the donors.
Here, to determine the importance in natura of AVI the investigators will analyze the blood content of patients presenting E. coli and S. aureus bacteremia.
The DNA of monocytes isolated from patients will be extracted and various genes implicated in the activity of various inflammasomes will be sequenced to identify mutations that could explain the susceptibility to bacteremia or a specific clinical presentation, i.e. requirement of a management in ICU because of organ failure.
Study Overview
Status
Unknown
Conditions
Intervention / Treatment
Study Type
Observational
Enrollment (Anticipated)
96
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
-
-
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Antibes, France
- CHG d'Antibes
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Cannes, France
- CH Pierre Nouveau
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Nice, France
- CHU de Lenval
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Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
8 years to 75 years (Child, Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Sampling Method
Non-Probability Sample
Study Population
Patient with S. aureus or E. coli bacteremia defined by at least one positive blood culture
Description
Inclusion Criteria:
- Patient with S. aureus or E. coli bacteriostatic bacteremia defined by at least one positive blood culture bottle
- Patient requiring a blood test as part of his bacteremia
- not subject to a judicial protection measure
- Signature of the non-opposition of consent (for minor patients signed by one of the parents or the representative of the parental authority)
- Affiliation to social security
Exclusion Criteria:
Immunocompromised patient defined by:
- current immunosuppressive therapies: corticosteroids, chemotherapy, biotherapy
- solid organ transplant patient or hematopoietic stem cell transplant
- chemotherapy-induced neutropenia
- Congenital immune deficiency
- bacteremia related to a peripheral or central catheter
- Urinary obstruction not lifted within the first 24 hours of management
- Intra-abdominal infection collected undrained in the first 24 hours of management
- primary infectious focus represented by mechanically ventilated pneumonia
- Pregnant or lactating woman
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Observational Models: Case-Only
- Time Perspectives: Prospective
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
Patients presenting E. coli and S. aureus bacteremia
Here, to determine the importance of the mutation we will analyze the blood content of patients presenting E. coli and S. aureus bacteremia
|
Here, to determine the importance of the mutation we will analyze the blood content of patients presenting E. coli and S. aureus bacteremia
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Time Frame |
---|---|
Establish an association between mutations in some inflammasomes and occurrence of E. coli associated with sepsis.
Time Frame: 1 hour
|
1 hour
|
Establish an association between mutations in some inflammasomes and occurrence of S. aureus bacteremia associated with sepsis.
Time Frame: 1 hour
|
1 hour
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Investigators
- Principal Investigator: Johan COURJON, MD, Centre Hospitalier Universitaire de Nice
Publications and helpful links
The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.
General Publications
- Lee CC, Chen SY, Chang IJ, Chen SC, Wu SC. Comparison of clinical manifestations and outcome of community-acquired bloodstream infections among the oldest old, elderly, and adult patients. Medicine (Baltimore). 2007 May;86(3):138-44. doi: 10.1097/SHK.0b013e318067da56. Erratum In: Medicine (Baltimore). 2013 Jul;92(4):216.
- Weinstein MP, Towns ML, Quartey SM, Mirrett S, Reimer LG, Parmigiani G, Reller LB. The clinical significance of positive blood cultures in the 1990s: a prospective comprehensive evaluation of the microbiology, epidemiology, and outcome of bacteremia and fungemia in adults. Clin Infect Dis. 1997 Apr;24(4):584-602. doi: 10.1093/clind/24.4.584.
- Wisplinghoff H, Bischoff T, Tallent SM, Seifert H, Wenzel RP, Edmond MB. Nosocomial bloodstream infections in US hospitals: analysis of 24,179 cases from a prospective nationwide surveillance study. Clin Infect Dis. 2004 Aug 1;39(3):309-17. doi: 10.1086/421946. Epub 2004 Jul 15. Erratum In: Clin Infect Dis. 2004 Oct 1;39(7):1093. Clin Infect Dis. 2005 Apr 1;40(7):1077.
- Valles J, Palomar M, Alvarez-Lerma F, Rello J, Blanco A, Garnacho-Montero J, Martin-Loeches I; GTEI/SEMICYUC Working Group on Bacteremia. Evolution over a 15-year period of clinical characteristics and outcomes of critically ill patients with community-acquired bacteremia. Crit Care Med. 2013 Jan;41(1):76-83. doi: 10.1097/CCM.0b013e3182676698.
- Herrmann JB, Muenstermann M, Strobel L, Schubert-Unkmeir A, Woodruff TM, Gray-Owen SD, Klos A, Johswich KO. Complement C5a Receptor 1 Exacerbates the Pathophysiology of N. meningitidis Sepsis and Is a Potential Target for Disease Treatment. mBio. 2018 Jan 23;9(1):e01755-17. doi: 10.1128/mBio.01755-17.
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Anticipated)
March 1, 2019
Primary Completion (Anticipated)
March 1, 2019
Study Completion (Anticipated)
September 1, 2020
Study Registration Dates
First Submitted
March 4, 2019
First Submitted That Met QC Criteria
March 7, 2019
First Posted (Actual)
March 11, 2019
Study Record Updates
Last Update Posted (Actual)
March 11, 2019
Last Update Submitted That Met QC Criteria
March 7, 2019
Last Verified
February 1, 2019
More Information
Terms related to this study
Additional Relevant MeSH Terms
Other Study ID Numbers
- 18-AOI-08
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
No
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
No
Studies a U.S. FDA-regulated device product
No
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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