Abstract
Metabolic potencies of the destetrapeptide insulin analogues des-(B27–B30)-insulin, des-(B27–B30)-insulin-B26-amide, [ThrB26] des-(B27–B30)-insulin-B26-amide and [GluB26] des-(B27-B30)-insulin-B26-amide were studied in anaesthetized adult rats and in primary cultures of rat hepatocytes and compared with that of the native hormone. Hypoglycaemic effects following intravenous bolus injection of insulin or analogues were similar, as were the stimulatory actions on total body glucose disposal during euglycaemic clamping. In these latter studies a maximal stimulation in the range 16–20 mg glucose/kg per hour was observed and identical half-maximally effective serum concentrations for all peptides of about 1 pmol/ml were obtained. Analogue actions on individual peripheral tissues estimated by the uptake of 2-deoxyglucose were not different from those of insulin. In hepatocyte cultures the stimulatory action of destetrapeptide analogues on glycogenesis and on aminoisobutyric acid transport was indistinguishable from that of native insulin, with identical half-maximally effective concentrations. These data demonstrate that des-(B27–B30)-insulin and related destetrapeptide analogues have high biological activity. Since the truncated non-amidated analogue appeared to be monomeric in solution, this peptide could be a candidate for an insulin preparation potentially showing rapid absorption from subcutaneous tissue.
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Hartmann, H., Korf, J., Ottmers, U. et al. Acute metabolic actions of des-(B27–B30)-insulin and related analogues in adult rats. Acta Diabetol 30, 108–114 (1993). https://doi.org/10.1007/BF00578224
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DOI: https://doi.org/10.1007/BF00578224