Diabetes, Vol 35, Issue 10 1090-1095, Copyright © 1986 by American Diabetes Association
Immunohistochemical colocalization of GABA and insulin in beta-cells of rat islet
DJ Garry, RL Sorenson, RP Elde, BE Maley and A Madsen
gamma-Aminobutyric acid (GABA) is found in high concentrations in the
pancreatic islet. In addition, enzymes regulating the level of GABA
(L-glutamate decarboxylase and GABA-alpha-ketoglutarate transaminase) have
been immunohistochemically localized in the medullary cells of the islet.
In this study, an immunofluorescence and elution/restaining protocol is
used to determine the distribution of GABA and either insulin, glucagon, or
somatostatin in a tissue section. GABA was not detected within the islet
alpha- or delta-cells but was determined to be localized within the
insulin-containing beta-cells.