Abstract
The effects of single and repeated electroconvulsive treatments (ECTs) on brain regional distribution of substance P (SP), neurokinin A (NKA), neurotensin (NT), neuropeptide Y (NPY), vasoactive intestinal polypeptide (VIP), and galanin (GAL) were studied in the rat. Rats were divided into four groups receiving one of the following treatments: one ECT, one sham ECT, six ECTs, or six sham ECTs. After sacrifice by focused microwave irradiation, brains were dissected into frontal cortex, striatum, occipital cortex, hippocampus, hypothalamus, and pituitary sections. Peptides were extracted by boiling the tissues in 1 mol/l acetic acid and measured in extract aliquots by specific radioimmunoassays. Marked regional differences (P = .0005) were found for each of the peptides measured. The highest concentrations of SP and NKA were found in the hypothalamus and, in descending order, in striatum, pituitary, frontal cortex, occipital cortex, and hippocampus. For NT, the highest level was found in the hypothalamus and, in descending order, in pituitary, striatum, hippocampus, frontal cortex, and occipital cortex. The highest VIP concentrations were measured in frontal and occipital cortex, followed by pituitary, hypothalamus, striatum, and ...Continue Reading
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