Autoradiographic studies of the γ-aminobutyric acid (GABA) system in the rat pancreas

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Abstract
The β-cells of the pancreatic islets have been shown to contain γ-aminobutyric acid (GABA) together with insulin. Autoradiographic analysis indicated that high affinity GABA binding sites (GABA receptors) are not present in the pancreas. High affinity GABA uptake sites are present, not in β-cells, but in a few cells on the periphery of the islets. These observations cast doubt on the suggestion that GABA has a paracrine role in the pancreas.