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      Zinc Supplementation Increases the Level of Serum Insulin-Like Growth Factor-I but Does Not Promote Growth in Infants with Nonorganic Failure to Thrive

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          Abstract

          We investigated in a randomized double-blind placebo-controlled study the effects of zinc supplementation (2 mg/kg/day) for 12 weeks on growth, serum insulin-like growth factor-I (IGF-I) and insulin-like factor binding protein-3 (IGFBP-3) on 3- to 9-month-old infants with nonorganic failure to thrive (NOFTT). 25 infants completed the study, 14 received zinc supplementation (group A), and 11 received placebo (group B). The control group for baseline measurements was composed of 10 age-matched normal growing infants. There were no significant changes in weight for age, length for age, or weight for length during the entire study period in either group A or B. Serum IGF-I levels at baseline were similar in all the groups. After 12 weeks of therapy, serum IFG-I levels increased significantly only in the zinc-supplemented group, from 40.3 ± 7 ng/ml at baseline to 65 ± 8 ng/ml (p < 0.05). There was a marked difference in serum IGF-I levels between the zinc-supplemented group and the placebo group after 12 weeks: 65 ± 8 vs. 49.4 ± 5 ng/ml (p = 0.058, 95% CI of difference 9.88–21.31). No change was demonstrated in serum IGFBP-3 levels in either study group. We conclude that although zinc supplementation increased serum IGF-I levels, it did not improve the growth parameters of infants with NOFTT.

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          Nutritional regulation of the insulin-like growth factors

          J. Thissen (1994)
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            The Effect of Different Growth Hormone Administration Frequencies on Growth in Growth Hormone-Deficient Patients

            In two different groups of clinically prepubertal children (bone age ≤8 years) with isolated growth hormone deficit we have evaluated either if the substitutive therapy administered by pump (permitting between 20.00 and 08.00 h the association of continuous and intermittent subcutaneous growth hormone administration) could improve growth (study A) or if a 3 times/week schedule treatment could be performed without any negative effect on growth with respect to 6 injections/week (study B). All patients had been previously successfully treated for at least 2 years by the same dose used during both studies (0.6 IU/kg/week) administered at bedtime 6 times/week. Study A: Each child underwent at bedtime both pump administration (6 months) and single daily injection (6 months). The circulating IGF-I pattern as well as the growth velocity and the ratio bone age increase/height age increase did not differ during the two treatment regimens. Study B: No differences were observed in auxological parameters during the treatment schedule on 3 times/week compared to the previous year on 6 times/week. In conclusion: Our treatment, consisting of the association of continuous and intermittent subcutaneous growth hormone administration, did not improve growth velocity with respect to single daily subcutaneous injection; the growth hormone administration 3 times/week, starting at the 3rd year of substitutive therapy or later, seems to have no negative effect on growth with respect to 6 injections/week.
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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
              1663-2818
              1663-2826
              1999
              March 2000
              09 March 2000
              : 52
              : 4
              : 200-204
              Affiliations
              Pediatric Diagnostic and Therapeutic Unit, Soroka Medical Center, Ben-Gurion University of the Negev, Beer-Sheva, Israel
              Article
              23461 Horm Res 1999;52:200–204
              10.1159/000023461
              10725786
              df67188f-2492-460d-92bb-b49cb5bd2223
              © 2000 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
              Figures: 1, Tables: 2, References: 31, Pages: 5
              Categories
              Original Paper

              Endocrinology & Diabetes,Neurology,Nutrition & Dietetics,Sexual medicine,Internal medicine,Pharmacology & Pharmaceutical medicine
              Failure to thrive,Insulin-like growth factor I,Zinc,Insulin-like growth factor binding protein 3,Growth,Randomized controlled study

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