Evaluation of Pathogenesis and Diagnosis of Mycoplasma Pneumoniae Community-acquired Pneumonia (CAP)

NCT ID: NCT03613636

Last Updated: 2024-02-22

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

490 participants

Study Classification

OBSERVATIONAL

Study Start Date

2016-05-01

Study Completion Date

2020-10-31

Brief Summary

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To investigate the Mycoplasma pneumoniae-specific circulating antibody-secreting cell (ASC) response and Mycoplasma pneumoniae-specific interferon (INF)-γ-secreting T cell response, along with polymerase chain reaction (PCR) and serology, in a cohort of children with community-acquired pneumonia (CAP) and controls.

Detailed Description

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Conditions

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Childhood Pneumonia Mycoplasma Pneumonia Antibody-secreting Cells Enzyme-linked Immunospot (ELISpot) Diagnosis

Study Design

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Observational Model Type

COHORT

Study Time Perspective

PROSPECTIVE

Study Groups

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CAP cohort

* Children of age 3 to 16 years;
* In- and outpatients;
* Clinically diagnosed community-acquired pneumonia (CAP).

Enzyme-linked immunospot (ELISpot) assay [Blood]

Intervention Type DIAGNOSTIC_TEST

The ASC ELISpot will be developed based on the improved methods recently described \[Nat Protoc 2013;8:1073-87\]. This protocol allows rapid (6-8 h) detection of specific ASCs in small volumes (1-2 ml) of blood. M. pneumoniae protein P1 (50 μl/ml) will be used as antigen. The optimal concentration of coating antigen will be assessed in advance in two-fold serial dilutions for clear spot definition. The M. pneumoniae-specific T cell ELISpot will be developed based on methods recently described \[Nat Protoc 2009;4:461-9\].

Healthy control cohort

* Healthy asymptomatic children of age 3 to 16 years;
* undergoing an elective surgical procedure.

Enzyme-linked immunospot (ELISpot) assay [Blood]

Intervention Type DIAGNOSTIC_TEST

The ASC ELISpot will be developed based on the improved methods recently described \[Nat Protoc 2013;8:1073-87\]. This protocol allows rapid (6-8 h) detection of specific ASCs in small volumes (1-2 ml) of blood. M. pneumoniae protein P1 (50 μl/ml) will be used as antigen. The optimal concentration of coating antigen will be assessed in advance in two-fold serial dilutions for clear spot definition. The M. pneumoniae-specific T cell ELISpot will be developed based on methods recently described \[Nat Protoc 2009;4:461-9\].

Family control cohort

\- Family members of index CAP patients.

Enzyme-linked immunospot (ELISpot) assay [Blood]

Intervention Type DIAGNOSTIC_TEST

The ASC ELISpot will be developed based on the improved methods recently described \[Nat Protoc 2013;8:1073-87\]. This protocol allows rapid (6-8 h) detection of specific ASCs in small volumes (1-2 ml) of blood. M. pneumoniae protein P1 (50 μl/ml) will be used as antigen. The optimal concentration of coating antigen will be assessed in advance in two-fold serial dilutions for clear spot definition. The M. pneumoniae-specific T cell ELISpot will be developed based on methods recently described \[Nat Protoc 2009;4:461-9\].

Interventions

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Enzyme-linked immunospot (ELISpot) assay [Blood]

The ASC ELISpot will be developed based on the improved methods recently described \[Nat Protoc 2013;8:1073-87\]. This protocol allows rapid (6-8 h) detection of specific ASCs in small volumes (1-2 ml) of blood. M. pneumoniae protein P1 (50 μl/ml) will be used as antigen. The optimal concentration of coating antigen will be assessed in advance in two-fold serial dilutions for clear spot definition. The M. pneumoniae-specific T cell ELISpot will be developed based on methods recently described \[Nat Protoc 2009;4:461-9\].

Intervention Type DIAGNOSTIC_TEST

Other Intervention Names

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Polymerase chain reaction (PCR) [Pharyngeal swab specimens] Enzyme-linked immunosorbent assay (ELISA) [Serum]

Eligibility Criteria

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Inclusion Criteria

CAP cohort:

* Children of age 3 to 18 years;
* In- and outpatients;
* Clinically diagnosed community-acquired pneumonia (CAP);

Healthy control cohort:

\- Healthy asymptomatic children of age 3 to 18 years undergoing an elective surgical procedure;

Family control cohort:

\- Family members of index CAP patients.

Exclusion Criteria

* Hospital-acquired pneumonia;
* Immunodeficiencies;
* Chronic lung disorders.
Minimum Eligible Age

3 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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University Children's Hospital, Zurich

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Patrick M. Meyer Sauteur, MD

Role: PRINCIPAL_INVESTIGATOR

University Children's Hospital, Zurich

Other Identifiers

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2016-00148

Identifier Type: -

Identifier Source: org_study_id

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