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The sigma-2 (σ-2) receptor: a review of recent patent applications: 2013-2018
Benjamin E Blass1, John Patrick Rogers1
1a Moulder Center for Drug Discovery Research , Temple University School of Pharmacy , Philadelphia , PA , USA.
Introduction:
The discovery of the sigma-2 receptor and the analogous sigma-1 receptor led to a decade-long quest to determine the true nature of this protein and novel ligands capable of modulating its activity. Despite this challenge, the sigma-2 receptor has been linked to several disease states, and multiple classes of sigma-2 ligands have been published in the 40+ years since its initial discovery.
Areas Covered:
This review covers newly published patent applications that describe sigma-2 receptor ligands capable of modulating disease states. The aforementioned documents entered the public domain as PCT patent applications between 2013 and 2018.
Expert Opinion:
In 2017, the sigma-2 receptor was positively identified as TMEM97 (transmembrane protein 97). The resolution of this 'identity crisis' will facilitate a greater understanding of the pharmacological role of sigma-2 receptor as well as support the identification of novel sigma-2 receptor ligands with potential utility as disease-modifying therapies.
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