ARTN

ARTN Full Name

artemin

ARTN Introduction

Artemin (ARTN) is a potent, secreted neurotrophic factor that belongs to the glial cell line-derived neurotrophic factor (GDNF) family of ligands. It exerts its complex biological effects primarily by forming a high-affinity complex with its specific cell-surface coreceptor, GDNF family receptor alpha 3 (GFRα3). This binding event subsequently recruits and activates the RET receptor tyrosine kinase, triggering vital intracellular signaling cascades such as the PI3K/AKT and MAPK/ERK pathways. Physiologically, ARTN is an indispensable survival factor for sympathetic and sensory neurons during both embryonic development and adult life. It tightly regulates the guidance of developing axons, maintains peripheral nerve integrity, and dictates the structural and functional plasticity of the nociceptive (pain-sensing) system, making it a master regulator of the neural microenvironment.

Figure 1. ARTN mediates the activation of the GFRα3/RET receptor complex. (Source: Zhu S, et al. 2020)

Clinically, the pathological dysregulation of the ARTN/GFRα3 signaling axis is heavily implicated in a broad spectrum of chronic pain syndromes and aggressive malignancies. In neurobiology, ARTN is uniquely positioned as a major driver of peripheral nerve sensitization. Elevated levels of ARTN in injured tissues are strongly associated with severe inflammatory and neuropathic pain. Notably, recent research has identified ARTN as an exclusive and absolute mediator of pathological cold allodynia (hypersensitivity to cold) following nerve injury. Conversely, because of its robust ability to stimulate axonal sprouting, controlled administration of ARTN is being explored therapeutically to actively repair neural damage and reverse specific neuropathies, highlighting its complex "double-edged" role in sensory neuroscience.

Beyond non-malignant neuropathies, ARTN has rapidly emerged as a potent oncogene in several highly lethal solid tumors, most notably pancreatic, breast, and cervical cancers. Within the tumor microenvironment, cancer cells and surrounding stromal cells frequently overexpress ARTN to fuel aggressive tumor proliferation, invasion, and evasion of apoptosis. Most crucially, ARTN is a key molecular driver of perineural invasion—a devastating process where cancer cells actively migrate along and invade surrounding peripheral nerves. This phenomenon not only facilitates rapid metastatic spread but also causes excruciating, intractable cancer-associated pain. Consequently, selectively inhibiting the ARTN/GFRα3/RET axis presents a highly promising dual therapeutic strategy: simultaneously halting metastatic tumor progression and alleviating severe oncological and neuropathic pain.

Alternate Names for ARTN

ARTN; artemin; EVN; NBN; ENOVIN; neublastin; neurotrophic factor; anti-Neublastin

• 1. Zhu S, et al. The role of glial cell line-derived neurotrophic factor family member artemin in neurological disorders and cancers. Cell Prolif. 2020 Jul;53(7):e12860.
  2. Gupta A, et al. Emerging evidence of artemin/GFRα3 signaling in musculoskeletal pain. Osteoarthritis Cartilage. 2025 Feb;33(2):196-206.