Abstract
Background
Clazosentan, an endothelin-1 receptor antagonist, has been shown to prevent the development of large vessel angiographic vasospasm after aneurysmal subarachnoid hemorrhage. We hypothesized that clazosentan can improve cerebral perfusion for territories affected by angiographically confirmed vasospasm.
Methods
The REVERSE study (REversal of Vasospasm with clazosEntan post-aneuRysmal Subarachnoid hEmorrhage) was a prospective multicenter open-label pilot study of adult patients with aneurysmal subarachnoid hemorrhage who received intravenous clazosentan after developing moderate to severe angiographic vasospasm. Using the radiographic data from the REVERSE study and additional retrospective radiographic data from our tertiary medical center, we compared the impact of intravenous clazosentan with intraarterial vasodilator therapy (medical standard of care) on vasospasm reversal using time to peak perfusion (TTPP; the time interval between the peak opacification of contrast dye in the main artery supplying an anatomically defined territory and the parenchymal phase when the dye is diffusely present in the brain parenchyma).
Results
Both intravenous clazosentan (n = 7 vessels) and intraarterial vasodilator therapy (n = 11 vessels) resulted in a statistically significant improvement in TTPP at 24 h post intervention, when compared with the TTPP just prior to intervention for territories with angiographically confirmed severe vasospasm in the proximal arteries at baseline (linear mixed-effect model, p = 0.02). The clazosentan and intraarterial vasodilator therapy groups exhibited no statistically significant interaction term [time x treatment group (medical standard of care vs. clazosentan)] in our model (p = 0.71), suggesting similar temporal course of two therapies.
Conclusions
In our small pilot study, intravenous clazosentan administered for at least 24 h had an effect comparable with that of intraarterial vasodilator therapy in reversing angiographically confirmed severe vasospasm. Our results may indicate that clazosentan, in an appropriately selected patient cohort, could offer a noninvasive approach for alleviating vasospasm.
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Acknowledgements
We would like to acknowledge Angelina Marr and Sébastien Roux of Idorsia Pharmaceuticals Ltd. for their courtesy review, advice, and input on this manuscript.
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RG conceived and designed the study. AL collected the data. RG monitored data collection. AL, JV, CT, RG, JH, and SW analyzed the data. CT provided the statistical analysis of the data. TLM, SW, AL, RG, and CT made contributions to interpretation of the data. AL drafted the article. All authors provided critical feedback and revisions to the article. All parties interested in data sharing may contact RG. All authors approved the final manuscript.
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This research has not received any specific grant from any funding agency in the public, commercial or not-for-profit sectors.
Conflict of interest
RG and SW have been consultants and scientific advisors for Actelion Pharmaceuticals Ltd and Idorsia Pharmaceuticals Ltd and have received consulting fees. COT has been a consultant for Lokavant Inc and has received consulting fees. RG, SW, and JH served as members of the independent review committee on the REVERSE study.
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Ethical approval was obtained from the Partners Human Research Committee, Boston, USA. Reference number: 2014P002368.
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Lai, A., Tan, C.O., Vranic, J. et al. Clazosentan for Improvement of Time to Peak Perfusion in Patients with Angiographically Confirmed Severe Vasospasm. Neurocrit Care 36, 240–247 (2022). https://doi.org/10.1007/s12028-021-01291-4
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DOI: https://doi.org/10.1007/s12028-021-01291-4