Identifying PARDS Endotypes

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

76 participants

Study Classification

OBSERVATIONAL

Study Start Date

2018-04-01

Study Completion Date

2022-09-05

Brief Summary

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Pediatric acute respiratory distress syndrome (PARDS) is a severe and diffuse lung injury that is a common cause of admission and mortality in the pediatric intensive care unit (PICU). PARDS can be secondary to many different causes, and there are few therapies that have been shown beneficial in PARDS. This study seeks to identify important PARDS subtypes using gene expression profiling of bronchial epithelial cells from control and PARDS subjects.

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Detailed Description

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Enrolled subjects will have nasal brushings collected at days 1, 3, 7, and 14 of intubation with collection of serum at these same time points. Brushing RNA will be processed by mRNA-Seq for gene expression analysis and compared to previously published serum biomarkers (interleukin-8, advanced glycosylation end-product specific receptor, and angiopoietin-2) to assess correlation and ability to discriminate PARDS endotypes. Changes in gene expression over time will be assessed to define a PARDS recovery gene expression signature, and correlation between bronchial and nasal gene expression will be determined.

Conditions

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Respiratory Distress Syndrome Respiratory Distress Syndrome, Adult

Study Design

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Observational Model Type

CASE_CONTROL

Study Time Perspective

PROSPECTIVE

Study Groups

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PARDS

Children \<18 years of age with PARDS and expected duration of hospitalization seven days or greater.

Respiratory epithelial cell brushing

Intervention Type DIAGNOSTIC_TEST

At specified time points, nasal brushings will be performed to obtain RNA.

Control

Children \<18 years of age without PARDS or other lung disease and expected duration of hospitalization 7 days or greater.

Respiratory epithelial cell brushing

Intervention Type DIAGNOSTIC_TEST

At specified time points, nasal brushings will be performed to obtain RNA.

Interventions

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Respiratory epithelial cell brushing

At specified time points, nasal brushings will be performed to obtain RNA.

Intervention Type DIAGNOSTIC_TEST

Eligibility Criteria

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Inclusion Criteria

All potential participants must:

1. Be aged zero to 18 years (both control and ARDS, not age matched)
2. Be admitted to the PICU with expected duration of hospitalization 7 days or greater.

ARDS patients must:

1. Have acute changes in chest x-ray (CXR)
2. Have a known or suspected insult within the prior 7 days that is consistent with ARDS
3. Have an oxygenation index (OI) of 4 or greater or and oxygen-sat index (OSI) of 5 or greater

1. OI = mean airway pressure X fraction inspired oxygen (FiO2) / arterial oxygen partial pressure (PaO2)
2. OSI = mean airway pressure X FiO2 / oxyhemoglobin saturation (SpO2) with sat \<= 97%.

Exclusion Criteria

1. Have a baseline oxygen requirement of 2 liters of oxygen or greater at home
2. Have disruption of the nasal passages
3. Have a history of excessive bleeding or known bleeding disorders
4. Be at high risk of bleeding
5. Have a do not resuscitate (DNR) or Limited Resuscitation Order

Minimum Eligible Age

1 Month

Maximum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No