Occluding-junctions form a permeability barrier around the hematopoietic niche in Drosophila that controls the production of immune cells in response to infection by shaping the signalling micro-environment produced by the niche.
That early cortical neural progenitor divisions strictly require OCLN isoform expression is a paradigm shift in the functional consideration of this protein best known for promoting between-cell barrier functions.
Clarinet, a novel C. elegans active zone protein with homology to vertebrate Piccolo and Rim, uses its different isoforms for diverse functions, including synaptic vesicle clustering, vesicle release and synaptogenesis.
The amount of secreted Pgk1 is sharply decreased in Rtn4al/NogoA-overexpressed muscle cells, leading to various manifestations of neurodegenerative disease, including denervated neuromuscular junction and failed neurite outgrowth of motoneurons.
Ultrastructural and loss-of-function experiments show that oligodendrocyte-encoded Kir4.1 is located near active axonal structures, including within myelin inner tongue, and has critical functions to promote axonal activity and preserve integrity.
Proteins implicated in Alzheimer’s disease, including amyloid precursor protein and ApoE receptors, interact with each other and with a signalling molecule called agrin to influence the development of the neuromuscular junction.
An effector of AMPK is essential for the kinase and its pharmacological activators, including Metformin, to strengthen cell-cell junctions and preserve epithelial cell polarity and barrier functions in the face of energetic stress, as well as to suppress oncogenesis.