Riociguat for the treatment of pulmonary arterial hypertension: a long-term extension study (PATENT-2)

Riociguat is a soluble, guanylate cyclase stimulator, approved for pulmonary arterial hypertension. In the 12-week PATENT-1 study, riociguat was well tolerated and improved several clinically relevant end-points in patients with pulmonary arterial hypertension who were treatment naïve or had been p...

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Main Authors: Rubin, Lewis J. (Author) , Grünig, Ekkehard (Author)
Format: Article (Journal)
Language:English
Published: 22 January 2015
In: The European respiratory journal
Year: 2015, Volume: 45, Issue: 5, Pages: 1303-1313
ISSN:1399-3003
DOI:10.1183/09031936.00090614
Online Access:Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1183/09031936.00090614
Verlag, kostenfrei, Volltext: http://erj.ersjournals.com/content/45/5/1303
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Author Notes:Lewis J. Rubin, Nazzareno Galiè, Friedrich Grimminger, Ekkehard Grünig, Marc Humbert, Zhi-Cheng Jing, Anne Keogh, David Langleben, Arno Fritsch, Flavia Menezes, Neil Davie, Hossein-Ardeschir Ghofrani

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520 |a Riociguat is a soluble, guanylate cyclase stimulator, approved for pulmonary arterial hypertension. In the 12-week PATENT-1 study, riociguat was well tolerated and improved several clinically relevant end-points in patients with pulmonary arterial hypertension who were treatment naïve or had been pretreated with endothelin-receptor antagonists or prostanoids. The PATENT-2 open-label extension evaluated the long-term safety and efficacy of riociguat. Eligible patients from the PATENT-1 study received riociguat individually adjusted up to a maximum dose of 2.5 mg three times daily. The primary objective was to assess the safety and tolerability of riociguat; exploratory efficacy assessments included 6-min walking distance and World Health Organization (WHO) functional class. Overall, 396 patients entered the PATENT-2 study and 324 (82%) were ongoing at this interim analysis (March 2013). The safety profile of riociguat in PATENT-2 was similar to that observed in PATENT-1, with cases of haemoptysis and pulmonary haemorrhage also being observed in PATENT-2. Improvements in the patients', 6-min walking distance and WHO functional class observed in PATENT-1 persisted for up to 1 year in PATENT-2. In the observed population at the 1-year time point, mean±sd 6-min walking distance had changed by 51±74 m and WHO functional class had improved in 33%, stabilised in 61% and worsened in 6% of the patients versus the PATENT-1 baseline. Long-term riociguat was well tolerated in patients with pulmonary arterial hypertension, and led to sustained improvements in exercise capacity and functional capacity for up to 1 year. Riociguat was well tolerated in patients with PAH, with sustained benefits in 6MWD and WHO FC for up to 1 year http://ow.ly/EskBj 
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