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Review
. 2024 Jun;62(3):e23610.
doi: 10.1002/dvg.23610.

Roles of odorant receptors during olfactory glomerular map formation

Ai Nakashima  1 , Haruki Takeuchi  2
Affiliations
Review

Roles of odorant receptors during olfactory glomerular map formation

Ai Nakashima et al. Genesis. 2024 Jun.

Abstract

The organization of the olfactory glomerular map involves the convergence of olfactory sensory neurons (OSNs) expressing the same odorant receptor (OR) into glomeruli in the olfactory bulb (OB). A remarkable feature of the olfactory glomerular map formation is that the identity of OR instructs the topography of the bulb, resulting in thousands of discrete glomeruli in mice. Several lines of evidence indicate that ORs control the expression levels of various kinds of transmembrane proteins to form glomeruli at appropriate regions of the OB. In this review, we will discuss how the OR identity is decoded by OSNs into gene expression through intracellular regulatory mechanisms.

Keywords: G‐protein‐coupled receptors; agonist‐independent activity; axonal projection; cAMP; odorant receptors; olfactory map; olfactory sensory neurons.

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