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      Improvements and New Potentials in Pharmacological Therapy of Diabetes mellitus in Children and Adolescents

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          Abstract

          Subcutaneous insulin substitution is not physiological. Despite the many attempts using intensified insulin regimens to render current insulin substitution protocols more physiological, a nondiabetic circulating insulin profile cannot be simulated in patients with type 1 diabetes. Despite many efforts, the pharmacological treatment of type 1 diabetes consists of an unphysiological attempt to substitute only one of the hormones which are lost after beta-cell destruction, namely insulin. It is therefore mandatory to search for additional means to achieve physiological regulation of glucose homeostasis and overall metabolic status. Peptides which are being developed as additional new therapeutic compounds for type 1 diabetes include, for example, IGF-I, leptin, C-peptide and amylin. In addition, the application of insulin analogues has already been introduced into clinical practice. However, so far none of these pharmaceutical compounds has been shown to offer real clinical benefits and substantially improve metabolic control in patients with type 1 diabetes. The results of long-term clinical trials using the peptide compounds listed above for the treatment of type 1 diabetes are still not available.

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          Most cited references6

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          Modulation of insulin activities by leptin.

          Leptin mediates its effects on food intake through the hypothalamic form of its receptor OB-R. Variants of OB-R are found in other tissues, but their function is unknown. Here, an OB-R variant was found in human hepatic cells. Exposure of these cells to leptin, at concentrations comparable with those present in obese individuals, caused attenuation of several insulin-induced activities, including tyrosine phosphorylation of the insulin receptor substrate-1 (IRS-1), association of the adapter molecule growth factor receptor-bound protein 2 with IRS-1, and down-regulation of gluconeogenesis. In contrast, leptin increased the activity of IRS-1-associated phosphatidylinositol 3-kinase. These in vitro studies raise the possibility that leptin modulates insulin activities in obese individuals.
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            Prevention of vascular and neural dysfunction in diabetic rats by C-peptide.

            C-peptide, a cleavage product from the processing of proinsulin to insulin, has been considered to possess little if any biological activity other than its participation in insulin synthesis. Injection of human C-peptide prevented or attenuated vascular and neural (electrophysiological) dysfunction and impaired Na+- and K+-dependent adenosine triphosphate activity in tissues of diabetic rats. Nonpolar amino acids in the midportion of the peptide were required for these biological effects. Synthetic reverse sequence (retro) and all-D-amino acid (enantio) C-peptides were equipotent to native C-peptide, which indicates that the effects of C-peptide on diabetic vascular and neural dysfunction were mediated by nonchiral interactions instead of stereospecific receptors or binding sites.
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              Insulin analogues.

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                Author and article information

                Journal
                HRE
                Horm Res Paediatr
                10.1159/issn.1663-2818
                Hormone Research in Paediatrics
                S. Karger AG
                978-3-8055-6720-6
                978-3-318-00326-0
                1663-2818
                1663-2826
                1998
                July 1998
                17 November 2004
                : 50
                : Suppl 1
                : 87-90
                Affiliations
                a Children’s Hospital, University of Leipzig, and b Children’s Hospital, Justus Liebig University, Giessen, Germany
                Article
                53111 Horm Res 1998;50(suppl 1):87–90
                10.1159/000053111
                9677006
                b0f58973-a03c-4c7b-80c6-2d6f568a7e31
                © 1998 S. Karger AG, Basel

                Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher. Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug. Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.

                History
                Page count
                Pages: 4
                Categories
                Approaches to Better Care

                Endocrinology & Diabetes,Neurology,Nutrition & Dietetics,Sexual medicine,Internal medicine,Pharmacology & Pharmaceutical medicine
                Insulin analogues,Insulin-like growth factor,Insulin-like growth factor-binding protein,Leptin,Amylin,C-peptide,Insulin lispro,Insulin-dependent diabetes mellitus,Children,Adolescence

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