Effectiveness of a Micronutrient Supplement to Lower Plasma Homocysteine MDEG2 Pilot Supplementation Trial

NCT ID: NCT03431597

Last Updated: 2019-01-22

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: PHASE2
• Total Enrollment: 298 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2018-04-26
• Study Completion Date: 2018-11-26

Brief Summary

This micronutrient supplementation study is a 3-arm randomized controlled trial, unblinded, with 125 women per arm. Non-pregnant, non-lactating healthy women of reproductive age in West Kiang, The Gambia, will be randomized to 12 weeks of daily supplementation of either a) novel micronutrient supplement, b) a United Nations International Multiple Micronutrient Preparation (UNIMMAP) tablet or c) no intervention (control). The novel micronutrient supplement is a drink powder providing 800 µg folic acid, 5.2 µg cyanocobalamin (B12), 2.8 mg Riboflavin-5'-phosphate (B2), and 4g trimethylglycine (betaine). UNIMMAP contains 15 micronutrients at the Recommended Daily Allowance level. The aim is to test the effectiveness of the supplements on correcting micronutrient deficiencies in the dry season and to reduce homocysteine levels. The hypothesis is that the new drink powder will be the most effective supplement, causing a reduction in 1 µmol/L compared to the control group after supplementation.

The supplements will be supplied to participants on a daily basis by Community-based Birth Attendants (CBCs). The CBCs will observe consumption of the supplement. The novel micronutrient supplement will be provided in powder form with instructions to dissolve one sachet in a cup of 200ml water. UNIMMAP will be provided in capsule form to be taken with water. Women will provide one 10ml fasted venous blood sample at baseline and another after 6 and 12 weeks of supplementation. At each time point they will also have their blood pressure and anthropometry assessed and provide a urine pregnancy test.

Correcting micronutrient deficiencies is extremely important for the long-term health of women, and in particular around the time of conception and throughout pregnancy since micronutrients are needed for the proper physical and cognitive development of the baby. Certain micronutrients are required for adding a methyl group to places on DNA ('DNA methylation'). The pattern of these methyl groups can help determine whether a gene is switched on or off. Correct functioning of DNA methylation processes is therefore of critical importance for fetal development. High levels of homocysteine can impede DNA methylation, therefore supplements that reduce homocysteine may not only be beneficial for the mother but also for the developing child. The most effective supplement in this trial will be considered for testing in larger pregnancy trials.

Detailed Description

In rural Gambia women experience considerable variation in their diet by season. In the dry season women have particular micronutrient deficiencies that can disrupt one-carbon metabolism pathways. In the dry season women have lower levels of most of the B vitamins and higher levels of homocysteine compared to the rainy season. The goal of this trial is to test two nutritional interventions to see which one works best in providing micronutrients in the ratio and quantity necessary for optimal 1-carbon metabolism in the dry season. The primary end point is to assess which supplement is most effective in reducing plasma homocysteine.

This is a 3-arm randomized controlled trial, unblinded, with 125 women per arm. Non-pregnant, non-lactating healthy women of reproductive age in West Kiang will be randomized to 12 weeks of daily supplementation of either a) novel micronutrient drink powder supplement, b) existing available micronutrient supplement (UNIMMAP) or c) no intervention (control). The novel drink powder provides 800 µg folic acid, 5.2 µg cyanocobalamin (B12), 2.8 mg Riboflavin-5'-phosphate (B2), and 4g trimethylglycine (betaine). This dose is twice the Recommended Daily Allowance for folic acid, B12 and B2. The UNIMMAP tablet provides 15 micronutrients (vitamins A, D, E, B1, B2, B6, B12, C, Niacin, Folic Acid, Iron, Zinc, Copper, Iron, Selenium) at the Recommended Daily Allowance level.

Potentially eligible participants will be identified through the Keneba Health and Demographic Surveillance System in all 35 villages of West Kiang region of The Gambia. Field assistants will visit the homes of potentially eligible participants to provide full information about the purpose and methods of the study, potential risks and benefits, and participants' rights. Full inclusion and exclusion criteria will be assessed. Participants will then be asked to provide a signed or thumb-printed informed consent before being enrolled into the study.

The supplements will be supplied to participants on a daily basis by Community-based Birth Companions (CBCs). The novel drink powder will be provided in daily sachets and dissolved in 200ml water. UNIMMAP will be provided in capsule form to be taken with water. The CBCs will observe consumption of the supplement. Participants will be given 7 coloured cards at the start of each week. Every day they will give the CBC one card and receive their supplement. Each week a field assistant will collect data on compliance by recording card collection in liaison with the CBC.

Women will provide one 10mL fasted venous blood sample at baseline and another after 6 and 12 weeks of supplementation. At each time point they will also have their blood pressure and anthropometry (weight and height) assessed and provide a urine pregnancy test. Women will be brought to the Medical Research Council Gambia (MRCG) field station at Keneba for the baseline, 6 week (mid-line) and 12 week (end-line) data collection visits. Participants will be followed-up after the intervention period for a further 3 weeks to monitor any adverse effects.

The fasted 10mL baseline, 6 week and 12 week blood samples will be taken by venepuncture into EDTA monovettes and kept on ice. Within one hour of collection the samples will be processed by the laboratory in Keneba to centrifuge the samples, separate the plasma and store plasma and red blood cell aliquots at -70°C. One plasma aliquot will be analysed in Keneba to measure homocysteine using the Cobas Integra 400 Plus analyser.

The hypothesis is that the novel micronutrient supplement will reduce plasma by at least 1 µmol/L compared to the control group after 12 weeks of daily supplementation. It will be more effective in reducing plasma homocysteine than existing UNIMMAP tablets.

This trial is powered to study to detect a decrease of 1 µmol/L homocysteine with 80% power and 95% confidence. The trial statistician will use a linear regression model to determine the mean difference between intervention and control homocysteine at 12 weeks adjusted for baseline homocysteine, week 12 age and week 12 body mass index.

Conditions

Micronutrient Deficiencies; Hyperhomocysteinemia

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Study Groups

oral nutritional supplementation

Daily novel micronutrient supplement: 800 μg folic acid, 5.2 μg cyanocobalamin (B12), 2.8 mg Riboflavin-5'- phosphate (B2), 4g trimethylglycine (betaine) in drink powder form. The drink will be dissolved in 200ml of water and taken daily for 12 weeks

Group Type: EXPERIMENTAL

novel micronutrient

Intervention Type: DIETARY_SUPPLEMENT

The supplements will be supplied to participants on a daily basis. The novel micronutrient supplement will be provided in powder form with instructions to dissolve one sachet in 250ml of clean water

oral nutritional supplementation, UNIMMAP

The United Nations Multiple Micronutrient Preparation (UNIMMAP) supplement is a capsule containing 15 micronutrients (vitamins A, D, E, B1, B2, B6, B12, C, Niacin, Folic Acid, Fe, Zn, Cu, I, Se) at the Recommended Daily Allowance level. UNIMMAP will be provided in capsule form and taken daily with water for 12 weeks.

Group Type: ACTIVE_COMPARATOR

existing micronutrient supplement, UNIMMAP

Intervention Type: DIETARY_SUPPLEMENT

UNIMMAP will be provided in tablet form and given one daily

control

no treatment will be given to this group observation only (no placebo)

Group Type: NO_INTERVENTION

No interventions assigned to this group

Interventions

novel micronutrient

The supplements will be supplied to participants on a daily basis. The novel micronutrient supplement will be provided in powder form with instructions to dissolve one sachet in 250ml of clean water

Intervention Type: DIETARY_SUPPLEMENT

existing micronutrient supplement, UNIMMAP

UNIMMAP will be provided in tablet form and given one daily

Intervention Type: DIETARY_SUPPLEMENT

Eligibility Criteria

Inclusion Criteria

• Pre-menopausal women aged 18-45 years

• Non-pregnant, confirmed by pregnancy urine test at eligibility screen
• Non-lactating (at least 9 months post-partum)
• No plan to conceive in the ensuing 3 months, asked verbally by field worker
• No plans to travel
• Healthy with no current illness and no chronic health problems, asked verbally by field worker

Exclusion Criteria

• Known history of chronic illness (particularly cardiovascular disease, renal disease, thyroid disease, cancer)

• Taking B vitamin or multivitamin supplements.
• Taking medication for prevention of seizures (e.g. Carbamazepine).

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 45 Years
• Eligible Sex: FEMALE
• Accepts Healthy Volunteers: Yes

Sponsors

London School of Hygiene and Tropical Medicine

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Andrew Prentice, PhD

Role: PRINCIPAL_INVESTIGATOR

Medical Research Council Unit, The Gambia

Locations

Keneba Field Station

Banjul, , The Gambia

Countries

The Gambia

References

James PT, Jawla O, Mohammed NI, Ceesay K, Akemokwe FM, Sonko B, Sise EA, Prentice AM, Silver MJ. A novel nutritional supplement to reduce plasma homocysteine in nonpregnant women: A randomised controlled trial in The Gambia. PLoS Med. 2019 Aug 13;16(8):e1002870. doi: 10.1371/journal.pmed.1002870. eCollection 2019 Aug.

Reference Type: DERIVED

PMID: 31408467 (View on PubMed)

Other Identifiers

SCC 1575

Identifier Type: -

Identifier Source: org_study_id