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Trial details imported from ClinicalTrials.gov
For full trial details, please see the original record at
https://clinicaltrials.gov/study/NCT02501343
Registration number
NCT02501343
Ethics application status
Date submitted
13/07/2015
Date registered
17/07/2015
Date last updated
7/03/2017
Titles & IDs
Public title
Alkaline Diet for Insulin Sensitivity
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Scientific title
Alkaline Diet for Insulin Sensitivity
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Secondary ID [1]
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ADIS (SVH 14/157)
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Universal Trial Number (UTN)
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Trial acronym
ADIS
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Linked study record
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Health condition
Health condition(s) or problem(s) studied:
Dysglycemia
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Type 2 Diabetes Mellitus
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Condition category
Condition code
Metabolic and Endocrine
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Diabetes
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Intervention/exposure
Study type
Interventional
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Description of intervention(s) / exposure
Treatment: Drugs - Sodium Bicarbonate Oral Capsule
Treatment: Drugs - Placebo
Experimental: Sodium bicarbonate - High acid load meal (Western style meal) with Sodium bicarbonate (Sodibic 840mg\*2)
Placebo comparator: Placebo - High acid load meal (Western style meal) with sodibic-matching placebo
Treatment: Drugs: Sodium Bicarbonate Oral Capsule
Sodium bicarbonate 1680 mg will be administered prior to the meal
Treatment: Drugs: Placebo
Sodibic-matching placebo (Stenlake Compounding Chemist, NSW, Australia) will be administered prior to the meal on a different day 1 to 2 weeks apart
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Intervention code [1]
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Treatment: Drugs
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Comparator / control treatment
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Control group
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Outcomes
Primary outcome [1]
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Changes in venous blood pH
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Assessment method [1]
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The investigators aim is to determine whether venous blood pH decreases after a high acid load meal, and whether this effect is attenuated by administration of sodium bicarbonate prior to a mixed meal study
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Timepoint [1]
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Baseline (fasting) and 3 hours post meal
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Secondary outcome [1]
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Changes in glycemic response to the meal
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Assessment method [1]
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Postprandial glucose excursion will be compared between sodium bicarbonate and placebo
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Timepoint [1]
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Baseline (fasting) and 3 hours post meal
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Secondary outcome [2]
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Changes in insulin response to the meal
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Assessment method [2]
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Postprandial insulin excursion will be compared between sodium bicarbonate and placebo
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Timepoint [2]
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Baseline (fasting) and 3 hours post meal
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Secondary outcome [3]
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Changes in arterial stiffness
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Assessment method [3]
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Postprandial arterial stiffness (measured by the augmentation index derived from Sphygmocore, Atcor Medical, Australia) will be compared between sodium bicarbonate and placebo
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Timepoint [3]
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Baseline (fasting) and 3 hours post meal
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Secondary outcome [4]
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Changes in hunger and satiety scores
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Assessment method [4]
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Postprandial hunger and satiety will be compared between sodium bicarbonate and placebo
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Timepoint [4]
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Baseline (fasting) and 3 hours post meal
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Eligibility
Key inclusion criteria
* Age range: 22-65
* Disease status: Healthy.
* Laboratory parameters: Fasting plasma glucose <7 mmol/L, HbA1c <6.5% (48 mmol/mol).
* Willingness to give written informed consent and willingness to participate and comply with the study.
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Minimum age
22
Years
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Maximum age
65
Years
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Sex
Both males and females
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Can healthy volunteers participate?
Yes
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Key exclusion criteria
* Individuals with a personal history of diabetes, hypertension, cardiovascular disease, kidney disease, respiratory disease or inflammatory disease.
* Individuals treated with medications known to affect insulin sensitivity.
* Individuals with fasting plasma glucose =7 mmol/L, HbA1c =6.5% (48 mmol/mol).
* Individuals with an unstable body weight in the past 3 months (+/- 2 kg or more).
* Individuals with a history of a psychological illness or condition that may interfere with the participant's ability to understand the requirements of the study.
* Individuals who smoke.
* Individuals who consume more than 40 g of alcohol daily.
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Study design
Purpose of the study
Prevention
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Allocation to intervention
Randomised controlled trial
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Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
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Methods used to generate the sequence in which subjects will be randomised (sequence generation)
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Masking / blinding
Blinded (masking used)
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Who is / are masked / blinded?
The people receiving the treatment/s
The people analysing the results/data
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Intervention assignment
Crossover
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Other design features
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Phase
NA
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Type of endpoint/s
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Statistical methods / analysis
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Recruitment
Recruitment status
Completed
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Data analysis
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Reason for early stopping/withdrawal
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Other reasons
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Date of first participant enrolment
Anticipated
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Actual
1/03/2015
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Date of last participant enrolment
Anticipated
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Actual
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Date of last data collection
Anticipated
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Actual
1/12/2016
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Sample size
Target
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Accrual to date
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Final
32
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Recruitment in Australia
Recruitment state(s)
NSW
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Recruitment hospital [1]
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Garvan Institute of Medical Research - Darlinghurst
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Recruitment postcode(s) [1]
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2010 - Darlinghurst
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Funding & Sponsors
Primary sponsor type
Other
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Name
Garvan Institute of Medical Research
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Address
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Country
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Ethics approval
Ethics application status
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Summary
Brief summary
The purpose of this study is to test the effect of increasing the body pH acutely with an alkaline medication (sodium bicarbonate, NaHCO3, sodibic) on glucose metabolism post meal in non diabetic subjects with normal renal function. The investigators aim to determine whether there is an acute reduction in venous blood pH following a typical Western-style (high acid load) breakfast in healthy men and women, and whether this effect is attenuated by the concurrent administration of an alkaline medication. The effect on glucose metabolism, hunger/satiety and arterial stiffness post meal will be assessed.
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Trial website
https://clinicaltrials.gov/study/NCT02501343
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Trial related presentations / publications
DeFronzo RA, Beckles AD. Glucose intolerance following chronic metabolic acidosis in man. Am J Physiol. 1979 Apr;236(4):E328-34. doi: 10.1152/ajpendo.1979.236.4.E328. Fagherazzi G, Vilier A, Bonnet F, Lajous M, Balkau B, Boutron-Rualt MC, Clavel-Chapelon F. Dietary acid load and risk of type 2 diabetes: the E3N-EPIC cohort study. Diabetologia. 2014 Feb;57(2):313-20. doi: 10.1007/s00125-013-3100-0. Reaich D, Graham KA, Channon SM, Hetherington C, Scrimgeour CM, Wilkinson R, Goodship TH. Insulin-mediated changes in PD and glucose uptake after correction of acidosis in humans with CRF. Am J Physiol. 1995 Jan;268(1 Pt 1):E121-6. doi: 10.1152/ajpendo.1995.268.1.E121. Souto G, Donapetry C, Calvino J, Adeva MM. Metabolic acidosis-induced insulin resistance and cardiovascular risk. Metab Syndr Relat Disord. 2011 Aug;9(4):247-53. doi: 10.1089/met.2010.0108. Epub 2011 Feb 25. Adeva MM, Souto G. Diet-induced metabolic acidosis. Clin Nutr. 2011 Aug;30(4):416-21. doi: 10.1016/j.clnu.2011.03.008. Epub 2011 Apr 9. Samocha-Bonet D, Campbell LV, Mori TA, Croft KD, Greenfield JR, Turner N, Heilbronn LK. Overfeeding reduces insulin sensitivity and increases oxidative stress, without altering markers of mitochondrial content and function in humans. PLoS One. 2012;7(5):e36320. doi: 10.1371/journal.pone.0036320. Epub 2012 May 7. Farwell WR, Taylor EN. Serum bicarbonate, anion gap and insulin resistance in the National Health and Nutrition Examination Survey. Diabet Med. 2008 Jul;25(7):798-804. doi: 10.1111/j.1464-5491.2008.02471.x. Mandel EI, Curhan GC, Hu FB, Taylor EN. Plasma bicarbonate and risk of type 2 diabetes mellitus. CMAJ. 2012 Sep 18;184(13):E719-25. doi: 10.1503/cmaj.120438. Epub 2012 Jul 23. Crawford SO, Hoogeveen RC, Brancati FL, Astor BC, Ballantyne CM, Schmidt MI, Young JH. Association of blood lactate with type 2 diabetes: the Atherosclerosis Risk in Communities Carotid MRI Study. Int J Epidemiol. 2010 Dec;39(6):1647-55. doi: 10.1093/ije/dyq126. Epub 2010 Aug 25. Lovejoy J, Newby FD, Gebhart SS, DiGirolamo M. Insulin resistance in obesity is associated with elevated basal lactate levels and diminished lactate appearance following intravenous glucose and insulin. Metabolism. 1992 Jan;41(1):22-7. doi: 10.1016/0026-0495(92)90185-d. Hayata H, Miyazaki H, Niisato N, Yokoyama N, Marunaka Y. Lowered extracellular pH is involved in the pathogenesis of skeletal muscle insulin resistance. Biochem Biophys Res Commun. 2014 Feb 28;445(1):170-4. doi: 10.1016/j.bbrc.2014.01.162. Epub 2014 Feb 3. Akter S, Eguchi M, Kurotani K, Kochi T, Pham NM, Ito R, Kuwahara K, Tsuruoka H, Mizoue T, Kabe I, Nanri A. High dietary acid load is associated with increased prevalence of hypertension: the Furukawa Nutrition and Health Study. Nutrition. 2015 Feb;31(2):298-303. doi: 10.1016/j.nut.2014.07.007. Epub 2014 Jul 30. Juraschek SP, Selvin E, Miller ER, Brancati FL, Young JH. Plasma lactate and diabetes risk in 8045 participants of the atherosclerosis risk in communities study. Ann Epidemiol. 2013 Dec;23(12):791-796.e4. doi: 10.1016/j.annepidem.2013.09.005. Epub 2013 Oct 5. Heilbronn LK, Gan SK, Turner N, Campbell LV, Chisholm DJ. Markers of mitochondrial biogenesis and metabolism are lower in overweight and obese insulin-resistant subjects. J Clin Endocrinol Metab. 2007 Apr;92(4):1467-73. doi: 10.1210/jc.2006-2210. Epub 2007 Jan 23. Maalouf NM, Cameron MA, Moe OW, Adams-Huet B, Sakhaee K. Low urine pH: a novel feature of the metabolic syndrome. Clin J Am Soc Nephrol. 2007 Sep;2(5):883-8. doi: 10.2215/CJN.00670207. Epub 2007 Aug 16.
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Public notes
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Contacts
Principal investigator
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Dorit Samocha-Bonet, BSc(Hons) MSc(Hons) PhD
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Address
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Garvan Institute of Medical Research
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Phone
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Fax
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Email
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Contact person for public queries
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Contact person for scientific queries
No information has been provided regarding IPD availability
What supporting documents are/will be available?
No Supporting Document Provided
Results publications and other study-related documents
No documents have been uploaded by study researchers.
Results not provided in
https://clinicaltrials.gov/study/NCT02501343
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