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Defining CD4 T helper and T regulatory cell endotypes of progressive and remitting pulmonary sarcoidosis (BRITE): protocol for a US-based, multicentre, longitudinal observational bronchoscopy study

Por: Koth · L. L. · Harmacek · L. D. · White · E. K. · Arger · N. K. · Powers · L. · Werner · B. R. · Magallon · R. E. · Grewal · P. · Barkes · B. Q. · Li · L. · Gillespie · M. · Collins · S. E. · Cardenas · J. · Chen · E. S. · Maier · L. A. · Leach · S. M. · OConnor · B. P. · Hamzeh · N. Y.
Introduction

Sarcoidosis is a multiorgan granulomatous disorder thought to be triggered and influenced by gene–environment interactions. Sarcoidosis affects 45–300/100 000 individuals in the USA and has an increasing mortality rate. The greatest gap in knowledge about sarcoidosis pathobiology is a lack of understanding about the underlying immunological mechanisms driving progressive pulmonary disease. The objective of this study is to define the lung-specific and blood-specific longitudinal changes in the adaptive immune response and their relationship to progressive and non-progressive pulmonary outcomes in patients with recently diagnosed sarcoidosis.

Methods and analysis

The BRonchoscopy at Initial sarcoidosis diagnosis Targeting longitudinal Endpoints study is a US-based, NIH-sponsored longitudinal blood and bronchoscopy study. Enrolment will occur over four centres with a target sample size of 80 eligible participants within 18 months of tissue diagnosis. Participants will undergo six study visits over 18 months. In addition to serial measurement of lung function, symptom surveys and chest X-rays, participants will undergo collection of blood and two bronchoscopies with bronchoalveolar lavage separated by 6 months. Freshly processed samples will be stained and flow-sorted for isolation of CD4 +T helper (Th1, Th17.0 and Th17.1) and T regulatory cell immune populations, followed by next-generation RNA sequencing. We will construct bioinformatic tools using this gene expression to define sarcoidosis endotypes that associate with progressive and non-progressive pulmonary disease outcomes and validate the tools using an independent cohort.

Ethics and dissemination

The study protocol has been approved by the Institutional Review Boards at National Jewish Hospital (IRB# HS-3118), University of Iowa (IRB# 201801750), Johns Hopkins University (IRB# 00149513) and University of California, San Francisco (IRB# 17-23432). All participants will be required to provide written informed consent. Findings will be disseminated via journal publications, scientific conferences, patient advocacy group online content and social media platforms.

Tele-health-monitoring may decrease emergency room visits and hospitalisation in patients with COPD

Por: OConnor · S.

Commentary on: Hong Y and Lee SH. Effectiveness of tele-monitoring by patient severity and intervention type in chronic obstructive pulmonary disease patients: a systematic review and meta-analysis. Int J Nurs Stud 2019;92:1–15.

Implications for practice and research

  • Monitoring patients’ health remotely at home using technology has been gaining in popularity for a number of years.

  • Evidence suggests that tele-monitoring may have the potential to reduce emergency room visits and hospitalisation for patients with chronic obstructive pulmonary disease (COPD), particularly those with high disease severity.

  • More rigorously conducted trials of tele-monitoring in patients with  COPD are required to determine clinical and cost-effectiveness.

  • Context

    COPD is a long-term, debilitating, respiratory condition that impacts the lives of millions of people worldwide. Poor management of COPD can lead to hospital admissions, increased healthcare costs and poorer outcomes for patients and their families.1 A range of interventions are...

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