Abstract
The most prominent long lasting effect of repeated injection of commercial pancreatic glucagon (0.1–30 mg/kg s.c. twice daily) in fed and starving rats is a depression of the major plasma lipids. This lipid-lowering effect of glucagon becomes maximal after 2–3 days and persists for at least 4 weeks. After withdrawal of glucagon, the lipid levels, slowly return to normal. Plasma lipid depression occurs at glucagon doses (0.1 mg/kg) which have no comparable long-lasting effect on the level of other plasma components, such as glucose, FFA, α-amino nitrogen and urea, as well as on urinary excretion of urea. Dose-frequency curves suggest that lipid depression could also be obtained by the frequent release of small pulses of endogenous glucagon. On a molar basis, glucagon is more potent than other lipid-lowering hormones, like thyroxine and oestradiol. The injection of glucagon leads to a marked increase of the glucagon/insulin ratio in plasma, in spite of a considerable insulin release. Experiments in streptozotocin-treated rats with fully developed diabetes demonstrate that the lipid depression by glucagon does not depend on insulin. In consequence, a role of glucagon in the physiologic regulation of plasma lipids in the rat is suggested.
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Gey, F., Georgi, H., Buhler, E. (1977). Lowering of Plasma Lipids, The Major Effect of Repeated Glucagon Administration in Rats. In: Foà, P.P., Bajaj, J.S., Foà, N.L. (eds) GLUCAGON: Its Role in Physiology and Clinical Medicine. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-6366-1_33
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DOI: https://doi.org/10.1007/978-1-4612-6366-1_33
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