Blood Glucose Response After Oral Lactulose Intake in Type 2 Diabetic Individuals
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World Journal of W J D Diabetes Submit a Manuscript: https://www.f6publishing.com World J Diabetes 2021 June 15; 12(6): 893-907 DOI: 10.4239/wjd.v12.i6.893 ISSN 1948-9358 (online) ORIGINAL ARTICLE Randomized Controlled Trial Blood glucose response after oral lactulose intake in type 2 diabetic individuals Thomas R Pieber, Eva Svehlikova, Ines Mursic, Tamara Esterl, Manfred Wargenau, Tina Sartorius, Lioba Pauly, Susann Schwejda-Guettes, Annalena Neumann, Valentin Faerber, John Friedrich Stover, Barbara Gaigg, Angelika Kuchinka-Koch ORCID number: Thomas R Pieber Thomas R Pieber, Eva Svehlikova, Ines Mursic, Tamara Esterl, Division of Endocrinology and 0000-0003-3554-0405; Eva Diabetology, Department of Internal Medicine, Medical University of Graz, Graz 8036, Austria Svehlikova 0000-0002-9743-2031; Ines Mursic 0000-0003-3836-6529; Manfred Wargenau, Department of Statistic, M.A.R.C.O. GmbH & Co. KG, Institute for Tamara Esterl 0000-0002-2615-680X; Clinical Research and Statistics, Düsseldorf 40211, Germany Manfred Wargenau 0000-0002-0886- 0158; Tina Sartorius 0000-0002-5264- Tina Sartorius, Department of Nutritional CRO, BioTeSys GmbH, Esslingen 73728, Germany 7207; Lioba Pauly 0000-0002-2673- 012X; Susann Schwejda-Guettes Lioba Pauly, Susann Schwejda-Guettes, Department of Medical & Clinical Affairs, Market 0000-0002-6635-6005; Annalena Access & Education Business Unit Enteral Nutrition, Bad Homburg 61352, Germany Neumann 0000-0002-9716-329X; Valentin Faerber 0000-0003-4250- Annalena Neumann, Valentin Faerber, Department of Medical, Clinical & Regulatory Affairs, 3389; John Friedrich Stover 0000- Business Unit Parenteral Nutrition, Keto-Analogues and Standard I.V. Fluids, Fresenius Kabi 0001-9457-0941; Barbara Gaigg 0000- Deutschland GmbH, Bad Homburg 61352, Germany 0002-8549-8877; Angelika Kuchinka- Koch 0000-0003-1874-1571. John Friedrich Stover, Department of Consultancy, Stover-Solutions, Zurich 8006, Switzerland Author contributions: Pieber TR, Barbara Gaigg, Angelika Kuchinka-Koch, Market Unit Lactulose, Fresenius Kabi Austria GmbH, Svehlikova E, Mursic I, and Esterl Linz 4020, Austria T performed the study, data Corresponding author: Valentin Faerber, PhD, Director, Department of Medical, Clinical & collection and interpretation; Stover JF, Pauly L, Schwejda- Regulatory Affairs, Business Unit Parenteral Nutrition, Keto-Analogues and Standard I. V. Guettes S, Kuchinka-Koch A, and Fluids, Fresenius Kabi Deutschland GmbH, Else-Kroener-Straße 1, Bad Homburg 61352, Gaigg B designed and supervised Germany. [email protected] the study; Wargenau M planned and performed the statistical analysis of the data and interpreted Abstract the results; Sartorius T, Neumann BACKGROUND A, and Faerber V wrote the Lactulose is approved for the symptomatic treatment of constipation, a gastrointe- manuscript; all authors reviewed, stinal (GI) complication common in individuals with diabetes. Lactulose products edited, and approved the contain carbohydrate impurities (e.g., lactose, fructose, galactose), which occur manuscript for submission. during the lactulose manufacturing process. These impurities may affect the blood glucose levels of individuals with type 2 diabetes mellitus (T2DM) using lactulose Supported by Fresenius Kabi for the treatment of mild constipation. A previous study in healthy subjects Deutschland GmbH, Germany. revealed no increase in blood glucose levels after oral lactulose intake. However, it is still unclear whether the intake of lactulose increases blood glucose levels in Institutional review board individuals with diabetes. WJD https://www.wjgnet.com 893 June 15, 2021 Volume 12 Issue 6 Pieber TR et al. Blood glucose after lactulose in diabetes statement: This study protocol was AIM reviewed and approved by the To evaluate the blood glucose profile after oral lactulose intake in mildly Independent Ethics Committee of constipated, non-insulin-dependent subjects with T2DM in an outpatient setting. the Medical University of Graz, METHODS Austria. This prospective, double-blind, randomized, controlled, single-center trial was Clinical trial registration statement: conducted at the Clinical Research Center at the Medical University of Graz, Austria, in 24 adult Caucasian mildly constipated, non-insulin-dependent subjects This study was registered in the with T2DM. Eligible subjects were randomized and assigned to one of six European Union Drug Regulating treatment sequences, each consisting of four treatments stratified by sex using an Authorities Clinical Trials incomplete block design. Subjects received a single dose of 20 g or 30 g lactulose Database, No. 2018-002359-14. (crystal and liquid formulation), water as negative control or 30 g glucose as Informed consent statement: All positive control. Capillary blood glucose concentrations were measured over a study participants provided period of 180 min post dose. The primary endpoint was the baseline-corrected written informed consent prior to area under the curve of blood glucose concentrations over the complete assess- enrollment. ment period [AUCbaseline_c (0-180 min)]. Quantitative comparisons were performed for both lactulose doses and formulations vs water for the equal lactulose dose vs Conflict-of-interest statement: The glucose, as well as for liquid lactulose vs crystal lactulose. Safety parameters study was sponsored by Fresenius included GI tolerability, which was assessed at 180 min and 24 h post dose, and Kabi Deutschland GmbH, adverse events occurring up to 24 h post dose. Germany. The sponsor’s representatives contributed to the RESULTS study design and the selection of In 24 randomized and analyzed subjects blood glucose concentration-time curves outcome measures before study after intake of 20 g and 30 g lactulose were almost identical to those after water start but had no role in study intake for both lactulose formulations despite the different amounts of carbohydrate impurities (≤ 3.0% for crystals and approx. 30% for liquid). The execution or data collection, or primary endpoint [AUC ] was not significantly different between data analyses. All other authors baseline_c (0-180 min) lactulose and water regardless of lactulose dose and formulation. Also with declare no potential conflicts of regard to all secondary endpoints lactulose formulations showed comparable interest related to this paper. results to water with one exception concerning maximum glucose level. A minor Data sharing statement: No increase in maximum blood glucose was observed after the 30 g dose, liquid additional data are available. lactulose, in comparison to water with a mean treatment difference of 0.63 mmol/L (95% confidence intervals: 0.19, 1.07). Intake of 30 g glucose significantly CONSORT 2010 statement: The increased all blood glucose endpoints vs 30 g liquid and crystal lactulose, authors read the CONSORT 2010 respectively (all P < 0.0001). No differences in blood glucose response were Statement, and the manuscript was observed between the different lactulose formulations. As expected, lactulose prepared and revised according to increased the number of bowel movements and was generally well tolerated. that statement. Subjects experienced only mild to moderate GI symptoms due to the laxative action of lactulose. Open-Access: This article is an open-access article that was CONCLUSION selected by an in-house editor and Blood glucose AUCbaseline_c (0-180 min) levels in mildly constipated, non-insulin fully peer-reviewed by external dependent subjects with T2DM are not affected by the carbohydrate impurities reviewers. It is distributed in contained in 20 g and 30 g crystal or liquid lactulose formulations. accordance with the Creative Commons Attribution Key Words: Lactulose; Constipation; Blood glucose; Type 2 diabetes mellitus; Laxative; NonCommercial (CC BY-NC 4.0) Sugar substitute license, which permits others to distribute, remix, adapt, build ©The Author(s) 2021. Published by Baishideng Publishing Group Inc. All rights reserved. upon this work non-commercially, and license their derivative works on different terms, provided the Core Tip: Individuals with diabetes are at risk of developing constipation, which can be original work is properly cited and symptomatically treated with lactulose. The question arose whether carbohydrate the use is non-commercial. See: htt impurities in crystal and liquid lactulose formulations would increase blood glucose p://creativecommons.org/License levels in individuals with diabetes. This study demonstrates that, at the recommended s/by-nc/4.0/ maintenance dosage of 20 g and at a higher dosage of 30 g lactulose, the blood glucose baseline-corrected area under the curve from 0 to 180 min levels in mildly constipated, Manuscript source: Unsolicited non-insulin dependent subjects with type 2 diabetes mellitus are not affected. manuscript Specialty type: Endocrinology and metabolism Citation: Pieber TR, Svehlikova E, Mursic I, Esterl T, Wargenau M, Sartorius T, Pauly L, Schwejda-Guettes S, Neumann A, Faerber V, Stover JF, Gaigg B, Kuchinka-Koch A. Blood WJD https://www.wjgnet.com 894 June 15, 2021 Volume 12 Issue 6 Pieber TR et al. Blood glucose after lactulose in diabetes Country/Territory of origin: Austria glucose response after oral lactulose intake in type 2 diabetic individuals. World J Diabetes 2021; 12(6): 893-907 Peer-review report’s scientific URL: https://www.wjgnet.com/1948-9358/full/v12/i6/893.htm quality classification DOI: https://dx.doi.org/10.4239/wjd.v12.i6.893 Grade A (Excellent): 0 Grade B (Very good):