Doxycycline for COPD in HIV-Infected Patients

Chronic obstructive pulmonary disease (COPD) is emerging as an important cause of morbidity in HIV-infected patients, likely due to multiple factors, including an increased prevalence of smoking, chronic inflammation and immune activation, oxidant stress and respiratory infections. Our preliminary data suggest that several lung matrix metalloproteinases (MMPs) are upregulated in HIV-infected smokers, which could contribute to accelerated emphysema by virtue of their ability to degrade extracellular matrix and basement membrane components. Our Specific Aim is to determine the safety, tolerability, and biologic effects of twice daily doxycycline for 6 months in HIV-infected subjects with COPD. To address this aim, we will conduct a randomized, double-blind, placebo-controlled pilot study of doxycycline 100 mg twice daily in 30 HIV-infected subjects with COPD (2:1 doxy:placebo). The primary endpoint will be safety/tolerability and secondary endpoints will include change in FEV1, reduction of MMP activity in epithelial lining fluid and cells obtained by bronchoscopy and doxycycline levels in blood, ELF and bronchoalveolar lavage (BAL) cell pellets. In addition to providing novel insights into the biologic effects of doxycycline in the lung, the pilot study will inform selection of endpoints for a phase II trial, which ultimately will address an unmet medical need for novel interventions for COPD/emphysema in HIV-infected patients.

Inclusion criteria

• Documented HIV infection
• CD4 cell count greater than 200 cells/mm3
• HIV RNA less than 400 copies/ml
• Stable antiretroviral therapy for greater than or equal to 12 weeks
• Fulfills GOLD definition for COPD (post-bronchodilator FEV1/FVC less than 0.7) and/or has radiographic evidence of emphysema
• Current or history of smoking with minimum 3 pack-year history
• ALT and AST less than 3 x upper limit of normal
• For women of childbearing potential: willingness to use 2 forms of birth control
• Subjects on therapy for COPD must be on stable therapy for at least 4 weeks

Exclusion criteria

• Pulmonary infection, COPD exacerbation, or acute opportunistic infection within 30 days of entry
• Conditions associated with increased sedation of bronchoscopy risk, including but not limited to Gold class 3 or 4 COPD, requirement for home oxygen, hypercapneic respiratory failure, poorly controlled hypertension
• Known allergy/intolerance to doxycycline, atropine, or any local anesthetic
• Inability to provide informed consent
• Pregnant or lactating women
• Men must agree not to attempt to make a woman pregnant or participate in sperm donation during the study and for 6 weeks after discontinuing the drug
• End stage renal disease
• Cirrhosis
• INR greater than 1.4
• Platelets less than 80,000
• Any condition including active drug or alcohol use or dependence that, in the opinion of the site investigator, would interfere with adherence to study requirements or increase the risk of bronchoscopy
• Active or planned participation in any other clinical trial or observational study without prior approval from the PI