Cardiac glial cells release neurotrophic S100B upon catheter-based treatment of atrial fibrillation

Katharina Scherschel, Katja Hedenus, Christiane Jungen, Marc D. Lemoine, Nicole Rübsamen, Marieke W. Veldkamp, Niklas Klatt, Diana Lindner, Dirk Westermann, Simona Casini, Pawel Kuklik, Christian Eickholt, Nikolaj Klöcker, Kalyanam Shivkumar, Torsten Christ, Tanja Zeller, Stephan Willems, Christian Meyer

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Atrial fibrillation (AF), the most common sustained heart rhythm disorder worldwide, is linked to dysfunction of the intrinsic cardiac autonomic nervous system (ICNS). The role of ICNS damage occurring during catheter-based treatment of AF, which is the therapy of choice for many patients, remains controversial. We show here that the neuronal injury marker S100B is expressed in cardiac glia throughout the ICNS and is released specifically upon catheter ablation of AF. Patients with higher S100B release were more likely to be AF free during follow-up. Subsequent in vitro studies revealed that murine intracardiac neurons react to S100B with diminished action potential firing and increased neurite growth. This suggests that release of S100B from cardiac glia upon catheter-based treatment of AF is a hallmark of acute neural damage that contributes to nerve sprouting and can be used to assess ICNS damage.
Original languageEnglish
Article numbereaav7770
JournalScience Translational Medicine
Issue number493
Publication statusPublished - 2019

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