ASNS and cancer: In addition, we discussed metabolites and their regulators currently established as contributors to cancer–nerve crosstalk (i.e., SLC2A3, asparagine synthetase, and serine) and suggested metabolites that may be implicated in cancer–nerve crosstalk based on their tumorigenic and neuroregulatory properties (i.e., lactate and vitamins A, B, D, E, and K).