The Effect of N-Acetyl-L-Cysteine, on Inflammatory and Oxidative Stress Markers in Pulmonary Sarcoidosis

Not Applicable

Completed

• Conditions: Pulmonary Sarcoidosis
• Interventions: Dietary Supplement: N-acetyl-cysteine; Drug: Placebo

• Registration Number: NCT01587001
• Lead Sponsor: National Jewish Health

Brief Summary

This is a pilot study investigating the effect of an antioxidant, N-Acetyl-L-Cysteine (NAC), on inflammation and oxidative stress in sarcoidosis.

Detailed Description

Sarcoidosis is a granulomatous lung disease predominantly affecting the lungs. Reactive oxidative species are produced secondary to oxidative stress and inflammation and can affect key cellular processes. The investigators have shown a role for oxidative stress in chronic beryllium disease (CBD), a granulomatous disease that resembles sarcoidosis, and have also shown that antioxidant therapy reduces inflammation in CBD. Oxidative stress also plays a role in sarcoidosis but the exact mechanism and potential effect of antioxidant therapy on sarcoidosis is unknown. The investigators propose conducting a pilot study investigating the effect of an antioxidant, N-Acetyl-L-Cysteine (NAC), on inflammation and oxidative stress in sarcoidosis. The investigators will measure and compare markers of inflammation and oxidative stress in the lungs of sarcoidosis patients before and after treatment with NAC. The results of this study will prepare the investigators for a larger study investigating the role of NAC as a therapy for sarcoidosis with changes in lung function and x-ray as our primary outcome. This will provide the investigators with a new non-toxic therapy for sarcoidosis that can be used on its own or to supplement other therapies minimizing their toxicity.

Study Timeline

• Study Start: 2011-11
• Study First Submitted: 2012-01-10
• Study First Submitted QC: 2012-04-26
• Study First Posted: 2012-04-27
• Primary Completion: 2014-10
• Study Completion: 2014-10
• Results First Submitted: 2016-03-21
• Results First Submitted QC: 2016-06-15
• Results First Posted: 2016-07-26
• Status Verified: 2020-10
• Last Update Submitted: 2020-10-14
• Last Update Posted: 2020-11-04

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 17

Inclusion Criteria

• Biopsy proven sarcoidosis.
• Pulmonary parenchymal involvement with a Scadding chest x-ray stage II, III or IV.
• Abnormal spirometry and/or DLCO (< 80% of predicted).
• Consenting adults : Age 18 years and above

Exclusion Criteria

• Positive lung washing or biopsy cultures for fungi or mycobacterial disease;
• Presence of other co-morbid conditions that may affect the patient's outcome.
• Patient inability to undergo venipuncture and BAL procedures.
• Current use of tobacco (smoking or otherwise) in the past 6 months
• Treatment with immunosuppressive therapy within the past 6 months.
• On oral anti-oxidant supplements.
• Active peptic ulcer disease.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Oral N-acetyl-cysteine	N-acetyl-cysteine	oral NAC 900mg three times daily for 8 weeks
Matching Placebo	Placebo	oral placebo three times daily for 8 weeks

Primary Outcome Measures

Name	Time	Method
Bronchoalveolar Lavage (BAL) and Peripheral Blood Mononuclear Cells (PBMC) TNF-α Levels	8 weeks of anti-oxidant therapy	Baseline peripheral blood mononuclear cells and bronchoalveolar lavage (BAL) lymphocyte percentages and lipopolysaccharide (LPS) stimulated tumor necrosis factor-α levels (pg/ml)

Secondary Outcome Measures

Name	Time	Method
Bronchoalveolar Lavage (BAL) Cell Glutathione (GSH) Levels	8 weeks of anti-oxidant therapy	We measured changes at baseline and at 8 weeks in BAL whole cell total GSH levels and cellular 8-OHdG before and after treatment with NAC/placebo.

Trial Locations

Locations (1)

National Jewish Health; 🇺🇸 Denver, Colorado, United States