Abstract
In presynaptic nerve terminals, synaptic vesicles are recycled locally via an evolutionarily conserved process that ensures maintenance of neurotransmission as well as structural integrity of synapses. Temperature is a key environmental factor that impacts critical steps involved in fusion, endocytosis and transport in different vesicle trafficking pathways. In neurons, temperature changes have been shown to impact synaptic vesicle recycling and synaptic efficacy. But contrary to non-neuronal systems, the temperature dependence of the steps involved in fusion, endocytosis and recycling of synaptic vesicles in presynaptic terminals is not completely understood, and the existing data remain highly debated. In this Review, we discuss the implications of biophysical, biochemical and functional findings on temperature dependence of membrane retrieval in multiple systems. We propose that systematic investigation of the temperature dependence of the presynaptic vesicle trafficking process can provide novel insight into poorly understood mechanisms that govern synaptic vesicle trafficking under diverse physiological conditions.
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