Vitamin B12 Dose Escalation Trial in Pregnancy

Single-blinded, Stratified, Multiple Ascending Dose Trial to Assess Pharmacokinetics and Identify Optimal Dose of Vitamin B12 in Pregnancy in Tanzania

Sponsors

Lead Sponsor: George Washington University

Collaborator: Ifakara Health Institute

Source George Washington University
Brief Summary

Vitamin B12 is a cofactor for 2 enzymes that have essential functions in pregnancy, both for maternal health and for fetal development. However, there is currently limited data regarding the metabolic fate and optimal dose of supplemental vitamin B12 and its relationship to vitamin B12 status in pregnancy. This is a single-blinded, stratified, dose-ranging trial of maternal vitamin B12 supplementation during pregnancy that will be conducted at the Ifakara Health Institute Bagamoyo Clinical Trial Unit in Tanzania. The investigators will enroll 40 pregnant women (gestational age 25-28 weeks) and 10 non-pregnant women (comparison group). Participants will be blinded to dosing (2.6, 10, and 50 µg) and supplementation will be given for six weeks. With this trial, the investigators aim to enhance our understanding of vitamin B12 bioavailability during pregnancy in people with sufficient and insufficient baseline B12 status, identify priority dose regimens of vitamin B12 in pregnancy for investigation in later phase clinical trials to be conducted in populations where vitamin B12 insufficiency or deficiency is common, and identify biomarkers of vitamin B12 intake appropriate for pregnancy.

Overall Status Not yet recruiting
Start Date 2022-06-30
Completion Date 2022-12-01
Primary Completion Date 2022-12-01
Phase Phase 1
Study Type Interventional
Primary Outcome
Measure Time Frame
Assessing the pharmacokinetics (PK) of B12 upon oral administration in pregnant women. Over 4 weeks
Assessing the pharmacokinetics (PK) of B12 upon oral administration in pregnant women. Over 4 weeks
Assessing the pharmacokinetics (PK) of B12 upon oral administration in pregnant women. Over 4 weeks
Secondary Outcome
Measure Time Frame
Assessing serum methylmalonic acid (MMA) At two time points: Day 29 and 43
Assessing serum and urinary homocysteine At two time points: Day 29 and 43
Assessing hematological response: hemoglobin At two time points: Day 29 and 43
Assessing hematological response: hematocrit At two time points: Day 29 and 43
Assessing hematological response: erythrocyte count At two time points: Day 29 and 43
Assessing hematological response: mean cell volume At two time points: Day 29 and 43
Assessing hematological response: reticulocyte number At two time points: Day 29 and 43
Assessing serum vitamin B12 At Day 43
Assessing holotranscobalamin II At Day 43
Assessing the ratio of serum B12 to holotranscobalamin At Day 43
Enrollment 50
Condition
Intervention

Intervention Type: Drug

Intervention Name: Vitamin B12 2.6 µg

Description: There are four groups of women (n = 20 total) who will receive B12 dosing once daily, including group 1a (sufficient baseline B12, pregnant), group 1b (sufficient baseline B12, non-pregnant), group 1c (insufficient baseline B12, pregnant), and group 1d (insufficient baseline B12, non-pregnant).

Arm Group Label: Dose 1 (2.6 µg)

Intervention Type: Drug

Intervention Name: Vitamin B12 10 µg

Description: There are two groups of women (n = 10 total) who will receive B12 dosing once daily, including group 2a (sufficient baseline B12, pregnant) and group 2b (insufficient baseline B12, pregnant).

Arm Group Label: Dose 2 (10 µg)

Intervention Type: Drug

Intervention Name: Vitamin B12 50 µg

Description: The participants (n = 20 total) will be randomly assigned to receive either a once per day B12 dose or a twice per day B12 dose. The four groups at this dose level include: group 3a (sufficient baseline B12, pregnant, Q12), group 3b (sufficient baseline B12, Q24), group 3c (insufficient baseline B12, pregnant, Q12), group 3d (insufficient baseline B12, Q24).

Arm Group Label: Dose 3 (50 µg)

Eligibility

Criteria:

The inclusion criteria for pregnant women are as follows: - Pregnant female - Has an estimated gestational age of 25 to 28 weeks at study initiation - Is between the ages of 18 and 45 years of age - Lives in the study area and does not plan to travel outside of the study area for the duration of the trial - Consents to participate in the trial The exclusion criteria for pregnant women are as follows: - Known multiple pregnancy (e.g. twins, triplets) - Has severe anemia (hemoglobin <7 g/dL) - Has pre-pregnancy or early pregnancy Body Mass Index ≥ 35 kg/m2 - Has a self-reported pre-pregnancy history of type II diabetes mellitus, hypertension, or hypercholesterolemia. - Has currently diagnosed preeclampsia or eclampsia. - Has currently diagnosed gestational diabetes. - Has currently diagnosed renal, liver, autoimmune, or bleeding disorders. The investigators will also assess all women for clinical signs of liver disease including: jaundice or yellowing of skin/sclera/mucosa, right upper quadrant tenderness or pain. All women will be given a liver function test, regardless of clinical signs of liver disease. The tests include: serum Alanine aminotransferase (ALT) and serum Aspartate aminotransferase (AST). Abnormal liver function is defined as the following in this study for women who the investigators screened during the 2nd trimester (25-26 weeks), ALT below 2 or above 33 U/L, or AST below 3 or above 33 U/L; for women screened during the 3rd trimester (27-28 weeks), ALT below 2 or above 25 U/L, or AST below 4 or above 32 U/L (25). Those with liver disease or abnormal liver function will be excluded from the study and referred for treatment. - Has currently diagnosed congestive heart failure. The investigators will first look for clinical signs of heart failure, and the investigators will focus on the following: i) Fatigue with limitation in performance of normal activities; ii) Coughing, wheezing and breathing difficulty because of lung congestion; iii) Swelling of ankles, feet and legs; and iv) Shortness of breath especially when lying flat. The investigators will only perform lab testing for those who have clinical manifestation, and refer them to appropriate and timely care. - Has a history of significant gastrointestinal surgeries, such as bariatric surgery, cholecystectomy, or other surgical procedures affecting the stomach, liver, bile ducts and/or small intestine that may disrupt enterohepatic recycling of vitamin B12. - Has a condition requiring the use of the following medications: H2 blockers, proton pump inhibitors, or prokinetic agents. - Reports regular use of an over-the-counter, high dose vitamin B12 supplementation. (This criteria does not refer to normal prenatal vitamin supplements which typically include approximately 1 RDA of vitamin B12 or 2.6 ug of vitamin B12. Women using multiple micronutrient supplements, or MMS, are eligible for the study). - Reports cigarette smoking or tobacco chewing - Reports heavy alcohol use (>3 drinks per day, or >7 drinks per week) - Current malaria infection (per rapid diagnostic) - HIV/AIDS infection (due to potential interaction between first-line antiretroviral dolutegravir and multivitamins that has been shown to decrease dolutegravir exposure by about 33%). - Has a known allergy to corn or hydroxyethyl starch (HES). The inclusion criteria for non-pregnant women are as follows: - Is between the ages of 18 and 45 years of age. - Lives in the study area and does not plan to travel outside of the study area for the duration of the trial - Consents to participate in the trial The exclusion criteria for non-pregnant women are as follows: - Has severe anemia (hemoglobin <8 g/dL) - Has Body Mass Index ≥ 35 kg/m2 - Has a self-reported diagnosis of type II diabetes mellitus, hypertension, or hypercholesterolemia. - Has currently diagnosed renal, liver, autoimmune, or bleeding disorders. The investigators will also assess all women for clinical signs of liver disease including: jaundice or yellowing of skin/sclera/mucosa, right upper quadrant tenderness or pain. Any woman with clinical signs of liver disease will be given a liver function test including: ALT, AST (26,27). Those with liver disease will be excluded from the study and referred for treatment. - Has currently diagnosed congestive heart failure. - Has a history of significant gastrointestinal surgeries, such as bariatric surgery, cholecystectomy, or other surgical procedures affecting the stomach, liver, bile ducts and/or small intestine that may disrupt enterohepatic recycling of vitamin B12. - Has a condition requiring the use of the following medications: H2 blockers, proton pump inhibitors, or prokinetic agents. - Reports regular use of an over-the-counter, high dose vitamin B12 supplementation. - Reports cigarette smoking or tobacco chewing - Reports heavy alcohol use (>3 drinks per day, or >7 drinks per week) - Current malaria infection (per rapid diagnostic) - HIV/AIDS infection (due to potential interaction between first-line antiretroviral dolutegravir and multivitamins that has been shown to decrease dolutegravir exposure by about 33%). - Has a known allergy to corn or hydroxyethyl starch (HES).

Gender:

Female

Minimum Age:

18 Years

Maximum Age:

45 Years

Healthy Volunteers:

Accepts Healthy Volunteers

Overall Contact Contact information is only displayed when the study is recruiting subjects.
Location
Facility: Contact: Ifakara Health Institute Bagamoyo Clinical Trial Unit (BCTU) Omar Lweno, Dr. +255 787 428 190 [email protected]
Location Countries

Tanzania

Verification Date

2022-06-01

Responsible Party

Type: Sponsor

Keywords
Has Expanded Access No
Condition Browse
Number Of Arms 3
Arm Group

Label: Dose 1 (2.6 µg)

Type: Active Comparator

Description: Adding Vitamin B12 at a dose of 2.6 µg

Label: Dose 2 (10 µg)

Type: Active Comparator

Description: Adding Vitamin B12 at a dose of 10 µg

Label: Dose 3 (50 µg)

Type: Active Comparator

Description: Adding Vitamin B12 at a dose of 50 µg

Acronym MM4MN-B12
Patient Data Undecided
Study Design Info

Allocation: Randomized

Intervention Model: Parallel Assignment

Intervention Model Description: Randomized Clinical Trial

Primary Purpose: Prevention

Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)

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