Identification of Protein Markers of Epidemiological and Clinical Interest by MALDI-TOF (SPECTRASURV)

August 8, 2018 updated by: Assistance Publique Hopitaux De Marseille

Not all infectious agents have the same epidemic potential, and this can vary widely within the same species. Rapid determination of this potential is essential to optimize control of infectious diseases. It is now accepted that identification with the species is clearly insufficient to identify an epidemic and to carry out epidemiological analyzes. Indeed, if the same bacterial species can present a great diversity of strains, it is organized in clonal complexes having strong variations of clinical and epidemiological expression.

More specifically, on a bio-epidemiological level, the clonal identification of the bacterial agent is a real asset because it can make it possible to identify the highly virulent strains or known to be resistant, the clones associated with nosocomial infections, the source of the infection. an epidemic and to follow its spatio-temporal extension, to know the epidemiological antiquity of the clone, to follow or rebuild a chain of transmission, to discover epidemic clusters.

There are rapid identification techniques, for example by polymerase chain reaction (PCR), but which are targeted at particular genomic compositions previously identified.

Routine bacterial identification now rests on the determination of the protein composition by mass spectrometry (MALDI-TOF). The bacterial spectrum is compared to a reference library of protein composition, thus obtaining an identification equivalent to that based on the 16s RNA (ribonucleic acid 16s) and can descend to an infra-species level.

The aim of this work is to use the proteome part of the MALDI-TOF spectrum to identify peaks that signal clonality and to determine proteomic fingerprintings that can be used for epidemiological and clinical purposes.

Instead of relying on expensive genomic methods, the identification of the clonal characteristics of the strains will rely on the bacterial proteome present on the MALDI-TOF spectrum that is produced during the routine identification of the bacterium.

The results are intended to feed a complementary knowledge base

Study Overview

Status

Unknown

Conditions

Intervention / Treatment

Study Type

Observational

Enrollment (Anticipated)

600000

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

  • France
      • Marseille, France, 13354
        • Recruiting
        • Assistance Publique Hôpitaux de Marseille
        • Contact:
        • Principal Investigator:
          • Hervé CHAUDET, PH

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

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Probability Sample

Study Population

Bacterial identification of patients taken as part of the care

Description

Inclusion Criteria:

  • bacterial identification by Matrix Assisted Laser Desorption Ionisation - Time of Flight (MALDI-TOF)

Exclusion Criteria:

  • Unidentified strain or noisy spectrum

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

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
Bacterial identification
Describe the MALDI-TOF spectrum to identify peaks that may be associated with epidemiological and clinical characteristics of bacterial strains
Diagnostic test: mass spectrometry (MALDI-TOF)
The determination of the protein composition of the bacterial spectrum

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Ability to find protein peaks that mark epidemic clones
Time Frame: 36 months
Ability to find protein peaks that mark epidemic clones Association of these clones with epidemic characteristics (age, antibacterial resistance, virulence)
36 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Assistance Publique Hopitaux De Marseille

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

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 (Actual)

July 31, 2018

Primary Completion (Anticipated)

July 31, 2022

Study Completion (Anticipated)

July 31, 2022

Study Registration Dates

First Submitted

August 8, 2018

First Submitted That Met QC Criteria

August 8, 2018

First Posted (Actual)

August 13, 2018

Study Record Updates

Last Update Posted (Actual)

August 13, 2018

Last Update Submitted That Met QC Criteria

August 8, 2018

Last Verified

August 1, 2018

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2017-16
  • TPS 15219ter (Registry Identifier: INDS number)

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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