# MicroRNAs Associated with IgLON Cell Adhesion Molecule Expression

## TL;DR

This paper explores how microRNAs regulate the IgLON family of cell adhesion molecules, which are involved in neuronal development and cancer.

## Contribution

The paper identifies microRNAs as key regulators of IgLON expression in various physiological and pathological contexts.

## Key findings

- MicroRNAs modulate LSAMP in cancer and senescence.
- MicroRNAs control OPCML in tumorigenesis.
- MicroRNAs are involved in NEGR1's response to ischemic injury.

## Abstract

The IgLON family of cell adhesion molecules consists of five members (LSAMP, OPCML, neurotrimin, NEGR1, and IgLON5) discovered as supporters of neuronal development, axon growth and guidance, and synapse formation and maintenance. Tumour suppression properties have recently been emerging based on antiproliferative effects through the modulation of oncogenic pathways. Available evidence endorses a role for non-coding RNAs or microRNAs as relevant controllers of IgLON molecule expression that can impact their critical physiological and pathological roles. Current findings support a function for long non-coding RNAs and microRNAs in the modulation of LSAMP expression in cell senescence, cancer biogenesis, addiction, and pulmonary hypertension. For OPCML, data point to a role for several microRNAs in the control of tumorigenesis. MicroRNAs were detected in neurotrimin-mediated functions in cancer biogenesis and in Schwann cell responses to peripheral nerve injury. For NEGR1, studies have mainly investigated microRNA involvement in neuronal responses to ischaemic injury, although data also exist about tumorigenesis and endothelial cell dysfunction. For IgLON5, information is only available about microRNA involved in myocardial infarction. In conclusion, despite much information being still missing and further research needed, the emerging picture favours a model in which non-coding RNAs exert a crucial role in modulating IgLON expression, ultimately affecting their important physiological functions.