VGF (VGF nerve growth factor inducible) is a nerve growth factor-inducible protein with diverse cellular functions and disease relevance. Based on functional annotations, VGF exhibits antimicrobial activity against gram-positive bacteria (Micrococcus luteus) and fungi (Pichia pastoris), suggesting a potential role in innate immunity [UniProt]. The protein localizes to multiple cellular compartments including the Golgi apparatus, endoplasmic reticulum lumen, and cytoplasmic vesicles, consistent with its involvement in secretory and signaling pathways [GO annotations]. VGF participates in carbohydrate homeostasis and hormone activity, and modulates synaptic plasticity and cAMP signaling, indicating roles in neural function and metabolic regulation [GO annotations]. Notably, VGF has been identified as a biomarker candidate associated with Parkinson's disease pathology; proteome profiling of cerebrospinal fluid from PD patients and controls identified VGF among proteins significantly altered in PD patients, with levels correlating with clinical severity measures 1. This suggests VGF may be involved in neuroinflammatory or neurodegenerative processes characteristic of Parkinson's disease. The protein's pleiotropic functions—spanning antimicrobial activity, vesicular trafficking, synaptic modulation, and metabolic control—combined with its potential as a PD biomarker, highlight VGF as a multifunctional neuropeptide with translational significance for understanding neurodegeneration.