Taurine Effect on Glycemic, Lipidic and Inflammatory Profile in Individuals With Type 2 Diabetes

Official title

Effect of Taurine on Glycemic, Lipid and Inflammatory Profile in Individuals With Type 2 Diabetes: a Randomized Clinical Trial

Overview

Type 2 diabetes mellitus (DM2) is characterized by chronic hyperglycemia, which is a risk factor for comorbidities and death. Although conventional pharmacotherapy is effective, some individuals do not reach the glycemic targets, requiring adjuvant therapies. Taurine is a semi-essential amino acid with antioxidant and osmoregulatory properties, commonly used as a nutritional supplement. Pre-clinical studies show its effectiveness in reducing blood glucose and cholesterol, but there are no well-conducted clinical studies evaluating the effect of taurine on glycated hemoglobin. Additionally, animal models showed that taurine had a protective effect from diabetic nephropathy. The hypothesize of this study is that taurine administration improves the glycemic, lipid, inflammatory, and anthropometric parameters in DM2 individuals.

Detailed description

A randomized, double-blind, placebo-controlled clinical trial will be conducted at Hospital de Clínicas de Porto Alegre (HCPA), Brazil. A total of 94 participants with DM2 will be recruited and randomized on a 1:1 ratio to receive 3 g taurine as a powder for oral suspension, twice per day, for 12 weeks or packets containing placebo. Blood will be collected prior to the treatment and after 12 weeks for glycated hemoglobin, fasting glucose, insulinemia, total cholesterol and fractions, triglycerides, C-reactive protein, creatinine, urea, tumor necrosis factor-alpha (TNF-α), interleukin 1 and 6 (IL-1 and IL-6) measures. Urine will be collected at baseline and after 12 weeks for creatine, protein, and albumin measured. Anthropometric parameters and a 24-h dietary recall will be monthly investigated. Fourteen days before the end of the trial, participants will be connected to a continuous glucose monitoring system for glucose monitoring system for glucose variability evaluation. Participants will be contacted by phone weekly to report adverse effects.

Interventions

• Drug Active comparator Taurine
  Participants will receive 3 g taurine, twice a day, as a powder for oral suspension (3 g/packet) for 12 weeks. Participants will be recommended to take the taurine immediately before the breakfast and dinner.
• Other Placebo Comparator
  Participants will receive the same treatment regimen and intake recommendation, but packets with the same appearance and size from those taurine ones will contain a vehicle

Primary outcome measures

• HbA1c [Time frame: baseline and 12 weeks]

Secondary outcome measures (9)

• Fasting glucose [Time frame: baseline and 12 weeks]
• Insulin levels [Time frame: baseline and12 weeks]
• Total serum cholesterol (CT) and fractions [Time frame: baseline and12 weeks]
• Triglycerides serum levels [Time frame: baseline and12 weeks]
• Glucose variability [Time frame: for 2 weeks (10-12th week)]
• Cytokine levels [Time frame: baseline and 12 weeks]
• Protein creatine index [Time frame: baseline and 12 weeks]
• Albuminuria [Time frame: baseline and 12 weeks]
• Body mass index (BMI) [Time frame: baseline and 4, 8, and 12 weeks]

Eligibility criteria

Inclusion criteria

• Female and male individuals, with clinical diagnosis of DM2 for at least 6 months;
• Age over 30 years;
• BMC equal to or above 18.5 kg/m2, without weight change in the last 3 months;
• HbA1c between 7.5% and 10.5%.

Exclusion criteria

• Use of herbal supplements, antioxidants, and multivitamins in the last 3 months;
• Pregnancy or lactation;
• Chronic renal failure with glomerular filtration rate calculated by MDRD < 30 mL/h;
• Myocardial infarction in the last than 6 months
• Current neoplasia;
• Chronic use of glucocorticoids;
• Bariatric surgery.

Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.

Healthy volunteers: No

Study design

Allocation

Randomized

Model

Parallel assignment

Masking

Triple blind

Primary purpose

Treatment

Study locations

Brazil · 1 center

• Hospital de Clínicas — Porto Alegre

Publications

• Caletti G, Herrmann AP, Pulcinelli RR, Steffens L, Moras AM, Vianna P, Chies JAB, Moura DJ, Barros HMT, Gomez R. Taurine counteracts the neurotoxic effects of streptozotocin-induced diabetes in rats. Amino Acids. 2018 Jan;50(1):95-104. doi: 10.1007/s00726-017-2495-1. Epub 2017 Sep 21. PMID 28936709
• Caletti G, Olguins DB, Pedrollo EF, Barros HM, Gomez R. Antidepressant effect of taurine in diabetic rats. Amino Acids. 2012 Oct;43(4):1525-33. doi: 10.1007/s00726-012-1226-x. PMID 22302366
• Chauncey KB, Tenner TE Jr, Lombardini JB, Jones BG, Brooks ML, Warner RD, Davis RL, Ragain RM. The effect of taurine supplementation on patients with type 2 diabetes mellitus. Adv Exp Med Biol. 2003;526:91-6. doi: 10.1007/978-1-4615-0077-3_12. No abstract available. PMID 12908588
• Chan AW, Tetzlaff JM, Altman DG, Laupacis A, Gotzsche PC, Krleza-Jeric K, Hrobjartsson A, Mann H, Dickersin K, Berlin JA, Dore CJ, Parulekar WR, Summerskill WS, Groves T, Schulz KF, Sox HC, Rockhold FW, Rennie D, Moher D. SPIRIT 2013 statement: defining standard protocol items for clinical trials. Ann Intern Med. 2013 Feb 5;158(3):200-7. doi: 10.7326/0003-4819-158-3-201302050-00583. PMID 23295957
• Fukuda N, Yoshitama A, Sugita S, Fujita M, Murakami S. Dietary taurine reduces hepatic secretion of cholesteryl ester and enhances fatty acid oxidation in rats fed a high-cholesterol diet. J Nutr Sci Vitaminol (Tokyo). 2011;57(2):144-9. doi: 10.3177/jnsv.57.144. PMID 21697633
• Gomez R, Caletti G, Arbo BD, Hoefel AL, Schneider R Jr, Hansen AW, Pulcinelli RR, Freese L, Bandiera S, Kucharski LC, Barros HMT. Acute intraperitoneal administration of taurine decreases the glycemia and reduces food intake in type 1 diabetic rats. Biomed Pharmacother. 2018 Jul;103:1028-1034. doi: 10.1016/j.biopha.2018.04.131. Epub 2018 Apr 25. PMID 29710660
• American Diabetes Association. 6. Glycemic Targets: Standards of Medical Care in Diabetes-2021. Diabetes Care. 2021 Jan;44(Suppl 1):S73-S84. doi: 10.2337/dc21-S006. PMID 33298417
• American Diabetes Association. 5. Facilitating Behavior Change and Well-being to Improve Health Outcomes: Standards of Medical Care in Diabetes-2021. Diabetes Care. 2021 Jan;44(Suppl 1):S53-S72. doi: 10.2337/dc21-S005. PMID 33298416

Identifiers

NCT: NCT04874012 · 20200559

Primary sources (government registries)

• ClinicalTrials.gov (US NIH)

View this study on ClinicalTrials.gov ↗