Frontiers Vascular adhesion protein 1 in giant cell arteritis and polymyalgia rheumatica Structural and functional studies of the VAPB PTPIP51 ER mitochondria tethering proteins in neurodegenerative diseases Acta Neuropathologica Communications Springer Nature Link Frontiers VAP Proteins From Organelle Tethers to Pathogenic Host Interactors and Their Role in Neuronal Disease Functional Modulation of Vascular Adhesion Protein 1 by a Novel Splice Variant PLOS One