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Such a scheme serves as a template for the lactate shuttling current within the mammalian CNS. An almost contemporaneous report extended this scheme to use to the mammalian brain, however with notable differences and additions. It was to prove some of the contentious papers in the field of mind energy metabolism and the talk raging round the subject persists. The paper described experiments carried out utilizing cultures of mouse cerebral neurones and astrocytes, and demonstrated a number of key options, which have been stoichiometrically strong (Pellerin and Magistretti, 1994). The background to the research was the realization that if metabolic signaling were to happen between neurones and astrocytes in the mammalian CNS, there should exist a signaling mechanism whereby the neurones signal to astrocytes their want for supply of metabolic substrate. The signaling mechanism will need to have the next characteristics: (1) it should be related to the frequency of activity of the neurones i.e., the discharge of the compound should be related to the activity of the neurones, (2) it must be sensed by the astrocyte i.e., there must be mechanism(s) whereby the astrocyte senses the molecule, and (3) there should exist a system or process whereby the concentration of the molecule is decreased upon cessation of exercise i.e., there should be an effective buffering system that reduces the concentration of the molecule after exercise.
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