path(MESH:"Drug Tolerance") association a(HBP:"alpha-4-containing nAChR")
In summary, while nicotine-induced upregulation requires at least the beta2 nAChR subunit, development of tolerance to nicotine requires neither the beta2 nor the alpha7 nAChR subunit; instead, it appears to be modulated by a beta4-containing nAChR and to require an alpha4-containing nAChR.
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If you find BEL Commons useful in your work, please consider citing: Hoyt, C. T., Domingo-Fernández, D., & Hofmann-Apitius, M. (2018). BEL Commons: an environment for exploration and analysis of networks encoded in Biological Expression Language. Database, 2018(3), 1–11.