PMID- 20926506 OWN - NLM STAT- MEDLINE DCOM- 20110222 LR - 20231213 IS - 1753-4666 (Electronic) IS - 1753-4658 (Linking) VI - 4 IP - 6 DP - 2010 Dec TI - Retinoid treatment of Emphysema in Patients on the Alpha-1 International Registry. The REPAIR study: study design, methodology and quality control of study assessments. PG - 319-32 LID - 10.1177/1753465810379617 [doi] AB - Emphysema is characterized by the destruction of alveolar wall and enlargement of alveolar airspaces, resulting in a reduction of the total lung gas exchange area, loss of lung elastic recoil and hyperinflation. The REPAIR study (Retinoid treatment of Emphysema in Patients on the Alpha-1 International Registry) is the first proof-of-concept study of a new potential disease-modifying drug, Palovarotene(c), an orally active, gamma selective retinoid agonist in patients with emphysema secondary to alpha-1-antitrypsin deficiency (AATD) as a model population for the general smoke-induced emphysema population. This article describes the study design as well as the effectiveness of the quality control that was implemented on the key efficacy endpoints, based on data derived from the placebo-treated subjects. In this multicentre, multinational study the implementation of standardized procedures included: careful site selection, use of trained staff, regular monitoring and machine calibration, use of biological controls and regular feedback to sites by an independent quality control centre. All of these procedures resulted in high-quality measurements of lung density, spirometry, static lung volumes and gas transfer. It was also confirmed that CT lung density was the most sensitive endpoint followed by TLco, FEV(1) and RV measured by body box. FAU - Stolk, Jan AU - Stolk J AD - Leiden University Medical Center, P.O. Box 9600, 2300 RC Leiden, The Netherlands. FAU - Cooper, Brendan G AU - Cooper BG FAU - Stoel, Berend AU - Stoel B FAU - Rames, Alexis AU - Rames A FAU - Rutman, Olga AU - Rutman O FAU - Soliman, Sherif AU - Soliman S FAU - Stockley, Robert AU - Stockley R LA - eng PT - Journal Article PT - Multicenter Study PT - Randomized Controlled Trial PT - Research Support, Non-U.S. Gov't DEP - 20101006 PL - England TA - Ther Adv Respir Dis JT - Therapeutic advances in respiratory disease JID - 101316317 RN - 0 (Pyrazoles) RN - 0 (Receptors, Retinoic Acid) RN - 0 (Stilbenes) RN - 28K6I5M16G (Palovarotene) SB - IM MH - Administration, Oral MH - Double-Blind Method MH - Emphysema MH - Female MH - Humans MH - Male MH - Middle Aged MH - Pulmonary Emphysema/*drug therapy/etiology/physiopathology MH - Pyrazoles/pharmacology/*therapeutic use MH - Quality Control MH - Receptors, Retinoic Acid/*agonists MH - Research Design MH - Respiratory Function Tests MH - Stilbenes/pharmacology/*therapeutic use MH - alpha 1-Antitrypsin Deficiency/*complications MH - Retinoic Acid Receptor gamma EDAT- 2010/10/12 06:00 MHDA- 2011/02/23 06:00 CRDT- 2010/10/08 06:00 PHST- 2010/10/08 06:00 [entrez] PHST- 2010/10/12 06:00 [pubmed] PHST- 2011/02/23 06:00 [medline] AID - 1753465810379617 [pii] AID - 10.1177/1753465810379617 [doi] PST - ppublish SO - Ther Adv Respir Dis. 2010 Dec;4(6):319-32. doi: 10.1177/1753465810379617. Epub 2010 Oct 6.