**5. Conclusions**

From our investigations, we conclude that the potassium channel Kv1.3, but not KCa3.1, contributes to SMC proliferation in arteriogenesis by controlling the expression of growth factor receptors, as well as their downstream genes relevant for phenotype switch and cell cycle progression.

**Author Contributions:** M.L. wrote and prepared the manuscript; A.C.M., K.K., H.I.-A., and S.M. the experiments; E.D. conducted the scientific direction and wrote the manuscript. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding.

**Acknowledgments:** We thank Anna Kluever for proofreading the manuscript.

**Conflicts of Interest:** The authors declare no conflict of interest.
