Clinical trial NCT01684722: Vitamin D and Omega-3 Trial to Prevent and Treat Diabetic Kidney Disease
Official title: Vitamin D and Omega-3 Trial to Prevent and Treat Diabetic Kidney Disease
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Diabetes
Keywords: vitamin D3
omega-3 fatty acids
fish oil
diabetes
kidney disease
albuminuria
urine albumin excretion
glomerular filtration rate
diabetic kidney disease
Lead sponsor: University of Washington
Sponsor class: OTHER
Collaborators: name: Brigham and Women's Hospital
name: National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
First posted: 2012-09-13
Enrollment: 1312
Sex: ALL
Minimum age (years): 50
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: FACTORIAL
Primary purpose: PREVENTION

Brief summary: The VITamin D and OmegA-3 TriaL (VITAL; NCT 01169259) is a randomized clinical trial in 20,000 U.S. men and women investigating whether taking daily dietary supplements of vitamin D3 (2000 IU) or fish oil (1 gram of omega-3 fatty acids) reduces the risk of developing cancer, heart disease, and stroke in people who do not have a prior history of these illnesses. This ancillary study is being conducted among participants in VITAL with a history of diabetes and will examine whether vitamin D or fish oil prevents the development and progression of diabetic kidney disease.

Detailed description: This ancillary study to the VITamin D and OmegA-3 TriaL (VITAL) will test whether vitamin D3, omega-3 fatty acids, or both prevent the development and progression of diabetic kidney disease (DKD). Persons with diabetes are at high risk of kidney disease. In 2005-2008, the prevalence of DKD among people with type 2 diabetes in the United States was 34.5%. Moreover, from 1988-1994 to 2005-2008, the prevalence of DKD in the United States grew 34% to 6.9 million people. DKD is both the leading cause of end stage renal disease in the developed world and a potent amplifier of cardiovascular disease risk.

Vitamin D and omega-3 fatty acids are promising interventions for DKD prevention and treatment, based on results of animal-experimental models and early human studies. Because these interventions are relatively safe, inexpensive, and widely available, they may offer opportunity to substantially reduce the burden of DKD in large populations. This VITAL ancillary study will test whether vitamin D3 and/or omega-3 fatty acids prevent progression of albuminuria and loss of glomerular filtration rate, two complementary manifestations of DKD, over 3 years of treatment.

In VITAL, 20,000 participants will be randomly assigned in a 2x2 factorial design to vitamin D3 (cholecalciferol) 2000 IU daily versus placebo, and to eicosapentaenoic acid 465 mg plus docosahexaenoic acid 375 mg daily versus placebo, and followed for a mean of 5 years to assess effects on cardiovascular disease and cancer events. This ancillary study will identify and recruit a sub-cohort of VITAL participants with diabetes at baseline and ascertain effects of study interventions on albuminuria and glomerular filtration rate in this group. First morning voids will be collected at baseline and year 3 for measurement of urine albumin-creatinine ratio. Blood samples will be collected simultaneously for measurement of estimated glomerular filtration rate (using serum creatinine and cystatin C) and other relevant biomarkers. This VITAL ancillary study is designed to determine whether vitamin D3 and/or omega-3 fatty acids have causal and clinically relevant effects on the development and progression of DKD.

Eligibility criteria: Inclusion Criteria: Participants in VITAL (NCT 01169259) with a self-reported physician diagnosis of diabetes are eligible to participate in this ancillary study.

Exclusion Criteria:

* Type 1 diabetes
* Diabetes only during pregnancy
* Known cause of kidney disease other than diabetes
* History of kidney transplantation

Primary outcomes:
measure: Change in Estimated Glomerular Filtration Rate
timeFrame: baseline to 5 years
Secondary outcomes:
measure: Change in Urine Albumin Excretion
timeFrame: baseline to 5 years
measure: Change in C-reactive Protein
timeFrame: baseline to 5 years
measure: Change in Interleukin-6
timeFrame: baseline to 5 years
measure: Change in NT-proBNP
timeFrame: baseline to 5 years
Other outcomes:
Locations:
city: Boston
country: United States
facility: Brigham Women's Hospital
state: Massachusetts
Study officials:
affiliation: University of Washington
name: Ian H de Boer, MD, MS
role: PRINCIPAL_INVESTIGATOR
References:
citation: Best CM, Zelnick LR, Thummel KE, Hsu S, Limonte C, Thadhani R, Sesso HD, Manson JE, Buring JE, Mora S, Lee IM, Cook NR, Friedenberg G, Luttmann-Gibson H, de Boer IH, Hoofnagle AN. Serum Vitamin D: Correlates of Baseline Concentration and Response to Supplementation in VITAL-DKD. J Clin Endocrinol Metab. 2022 Jan 18;107(2):525-537. doi: 10.1210/clinem/dgab693.
citation: Limonte CP, Zelnick LR, Ruzinski J, Hoofnagle AN, Thadhani R, Melamed ML, Lee IM, Buring JE, Sesso HD, Manson JE, de Boer IH. Effects of long-term vitamin D and n-3 fatty acid supplementation on inflammatory and cardiac biomarkers in patients with type 2 diabetes: secondary analyses from a randomised controlled trial. Diabetologia. 2021 Feb;64(2):437-447. doi: 10.1007/s00125-020-05300-7. Epub 2020 Oct 24.
citation: de Boer IH, Zelnick LR, Ruzinski J, Friedenberg G, Duszlak J, Bubes VY, Hoofnagle AN, Thadhani R, Glynn RJ, Buring JE, Sesso HD, Manson JE. Effect of Vitamin D and Omega-3 Fatty Acid Supplementation on Kidney Function in Patients With Type 2 Diabetes: A Randomized Clinical Trial. JAMA. 2019 Nov 19;322(19):1899-1909. doi: 10.1001/jama.2019.17380.