Clinical trial NCT01738763: Effects of Different Doses of Pinitol on Carbohydrate Metabolism Parameters in Healthy Subjects
Official title: Effects of Different Doses of Pinitol on Carbohydrate Metabolism Parameters in Healthy Subjects: a Randomized Cross-over Placebo-controlled Study
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Healthy
Insulin Sensitivity
Keywords: Glucose
Insulin
3-O-methyl-D-chiro-inositol
Lead sponsor: University of Valencia
Sponsor class: OTHER
First posted: 2012-11-30
Enrollment: 30
Sex: ALL
Minimum age (years): 18
Maximum age (years): 65
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: BASIC_SCIENCE

Brief summary: The purpose of this study was to assess the acute effects of increasing doses of pinitol on glucose tolerance and insulin sensitivity and to evaluate the absorption of pinitol after consumption of an oral nutritive pinitol-enriched beverage in healthy subjects.


Eligibility criteria: Inclusion Criteria:

* The inclusion criteria for all subjects were age range of 18-65 years, body mass index of 20-30 Kg/m2 and clinically normal kidney function, liver function, heart function, protein status and haematological profile.

Exclusion Criteria:

* Exclusion criteria were pregnancy or lactation, alteration of carbohydrate metabolism, fasting glycaemia ≥5.55 mmol/l on at least two previous occasions, diabetes, or medication known to interfere with glucose metabolism.

Primary outcomes:
measure: Dose-response curves to assess the change in glucose and insulin concentration after an oral ingestion of different doses of pinitol with respect to the corresponding placebo
timeFrame: up to 120 minutes
Secondary outcomes:
measure: Dose-response curves to assess the change in pinitol concentration after an oral ingestion of different doses of pinitol with respect to the corresponding placebo
timeFrame: up to 240 minutes
Other outcomes:
Locations:
city: Valencia
country: Spain
facility: University Hospital Dr Peset
Study officials:
affiliation: University of Valencia
name: Antonio Hernández Mijares, MD, PhD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Stull AJ, Wood KV, Thyfault JP, Campbell WW. Effects of acute pinitol supplementation on plasma pinitol concentration, whole body glucose tolerance, and activation of the skeletal muscle insulin receptor in older humans. Horm Metab Res. 2009 May;41(5):381-6. doi: 10.1055/s-0028-1128140. Epub 2009 Feb 16.
citation: Campbell WW, Haub MD, Fluckey JD, Ostlund RE Jr, Thyfault JP, Morse-Carrithers H, Hulver MW, Birge ZK. Pinitol supplementation does not affect insulin-mediated glucose metabolism and muscle insulin receptor content and phosphorylation in older humans. J Nutr. 2004 Nov;134(11):2998-3003. doi: 10.1093/jn/134.11.2998.
citation: Larner J, Allan G, Kessler C, Reamer P, Gunn R, Huang LC. Phosphoinositol glycan derived mediators and insulin resistance. Prospects for diagnosis and therapy. J Basic Clin Physiol Pharmacol. 1998;9(2-4):127-37. doi: 10.1515/jbcpp.1998.9.2-4.127.
citation: Larner J, Brautigan DL, Thorner MO. D-chiro-inositol glycans in insulin signaling and insulin resistance. Mol Med. 2010 Nov-Dec;16(11-12):543-52. doi: 10.2119/molmed.2010.00107. Epub 2010 Aug 27.
citation: Kang MJ, Kim JI, Yoon SY, Kim JC, Cha IJ. Pinitol from soybeans reduces postprandial blood glucose in patients with type 2 diabetes mellitus. J Med Food. 2006 Summer;9(2):182-6. doi: 10.1089/jmf.2006.9.182.
citation: Kim JI, Kim JC, Kang MJ, Lee MS, Kim JJ, Cha IJ. Effects of pinitol isolated from soybeans on glycaemic control and cardiovascular risk factors in Korean patients with type II diabetes mellitus: a randomized controlled study. Eur J Clin Nutr. 2005 Mar;59(3):456-8. doi: 10.1038/sj.ejcn.1602081.
citation: Kim HJ, Park KS, Lee SK, Min KW, Han KA, Kim YK, Ku BJ. Effects of pinitol on glycemic control, insulin resistance and adipocytokine levels in patients with type 2 diabetes mellitus. Ann Nutr Metab. 2012;60(1):1-5. doi: 10.1159/000334834. Epub 2011 Dec 16.