IP Peru, Bioavailability of Iron From Potatoes (IPPERU)

Iron Bioavailability From Iron Bio-fortified Irish Potato in Peruvian Women Between 18-25 Years of Age.

To combat iron deficiency in Low and Middle-Income Countries, sustainable food-based solutions have to be implemented to serve populations, not only individuals. One solution is the introduction of iron biofortified staple crops on market level. Before market level introduction, the bioavailability of iron in the new biofortified Irish Potato (IP) breed needs to be assessed. In this study the investigator compares the fractional and total iron absorption after extrinsic stable isotope labelling of the new biofortified high iron IP variety and a normal market level IP variety. The study is conducted in Peruvian women of reproductive age with marginal iron status.

Study Overview

• Status: Completed
• Conditions: Iron-deficiency; Iron Deficiency Anemia; Iron Deficiency (Without Anemia)
• Intervention / Treatment: Other: High Fe IP meal labelled with Fe-58; Other: Control OFSP meal labelled with Fe-57

Detailed Description

The 40 women enrolled will consume test meals consisting of 500g steamed and mashed high iron Irish potatoes labelled with Fe-58 daily for a period of 10 days and will then switch to the test meals consisting of 400g steamed and mashed control sweet potatoes labelled with Fe-57 for a period of 10 days. The order of test meal type is random. A baseline blood sample will be taken on the first meal feeding day prior to consumption of any test meals, study day 15 (before switching to the other test meal IP variety), on study day 26 (14 days after completion of the first test meal period) and on Day 40 (14 days after completion of the second test meal period). Erythrocyte incorporation of the stable isotope labels will be measured in these blood samples using an ICPMS and will be used to calculate fractional and total iron absorption from the two different type of test meals.

• Study Type: Interventional
• Enrollment (Actual): 36
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Peru
  • Lima, Peru, 1506
    • Instituto de Investigacion Nutricional

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 25 years (Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: Female

Description

Inclusion Criteria:

1. Woman aged 18-25 years old.
2. Low/marginal iron status: serum ferritin (SF) ≤ 25 μg/L.
3. Normal BMI for age (18.5-25.0 kg/m2).
4. Weight less than 65 kg. We will give equal amounts of stable isotopes to each study participant and therefore need to set a limit on body weight in order to achieve measurable isotope enrichment in erythrocytes.
5. Willing and able to commute to the meal distribution/health centre site.
6. Able to understand and to sign written concept prior to trial entry.
7. Informed consent signed.
8. Prepared to use contraceptives for the duration of the study

Exclusion Criteria:

1. Severe anaemia Hb <107.2 g/L (adjusted for meters above sea level)
2. Inflammation/infection (CRP > 5 mg/100 ml).
3. Relevant digestive (intestinal, gastric, hepatic or pancreatic), renal, metabolic disease, and any other problem that will interfere with the study as determined by the screening visit and by self-report from the subjects.
4. Pregnant (urine test before entering the study) or breast-feeding.
5. Any medication or supplement which may impact iron metabolism.
6. Unwilling to discontinue vitamin and minerals supplements at least two weeks prior to the study start, as ascertained at the screening visit.
7. Significant blood losses over the past 6 months (i.e. trauma, major surgery, blood donation).
8. Subject who cannot be expected to comply with study procedures.
9. Presence of fever (>37.5 °C) on the first study day

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Prevention
• Allocation: Randomized
• Interventional Model: Crossover Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: High iron Irish potato; Meal sequence B, IP High Fe	Other: High Fe IP meal labelled with Fe-58; 500 gram steamed, mashed OFSP high Fe with 0.33 mg FeSO4-58 daily for 10 days
Active Comparator: Regular Irish potato; Meal sequence A, OFSP control	Other: Control OFSP meal labelled with Fe-57; 500 gram steamed, mashed OFSP control with 0.33 mg FeSO5-57 daily for 10 days

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Fractional iron absorption from both Irish Potato test meals	Proportion of stable isotope administered with test meals that has been incorporate into erythrocytes 14 days after completion of specific test meal feeding period	Measured 2 weeks after completion of feeding day sequence. Sequence consist of 2 times 10 feeding days.
Total iron absorption from both Irish Potato test meals	Amount of iron absorbed (mg) from the labelled test meals	Measured 2 weeks after completion of feeding day sequence. Sequence consist of 2 times 10 feeding days.

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Concentration of plasma ferritin level	Iron status marker	screening (-1), day 1 (baseline), day 15 (before switch to other test meal type) day 26 (last feeding day) and day 40 (14 days after last test meal consumption).
Concentration of plasma CRP level	Inflammation status marker	screening (-1), day 1 (baseline), day 15 (before switch to other test meal type) day 26 (last feeding day) and day 40 (14 days after last test meal consumption).

Collaborators and Investigators

• Sponsor: Swiss Federal Institute of Technology
• Collaborators: United States Agency for International Development (USAID); Quadram Institute Bioscience; Genetics, Genomics and Crop Improvement Program, International Potato Center, Lima, Peru; Instituto de Investigacion Nutricional, Lima, Peru
• Investigators: Principal Investigator: Reyna Liria, INN; Principal Investigator: Mary Penny, INN

Publications and helpful links

General Publications

• Jongstra R, Mwangi MN, Burgos G, Zeder C, Low JW, Mzembe G, Liria R, Penny M, Andrade MI, Fairweather-Tait S, Zum Felde T, Campos H, Phiri KS, Zimmermann MB, Wegmuller R. Iron Absorption from Iron-Biofortified Sweetpotato Is Higher Than Regular Sweetpotato in Malawian Women while Iron Absorption from Regular and Iron-Biofortified Potatoes Is High in Peruvian Women. J Nutr. 2020 Dec 10;150(12):3094-3102. doi: 10.1093/jn/nxaa267.

Study record dates

Study Major Dates

• Study Start (Actual): May 14, 2019
• Primary Completion (Actual): August 8, 2019
• Study Completion (Actual): August 8, 2019

Study Registration Dates

• First Submitted: December 29, 2019
• First Submitted That Met QC Criteria: December 29, 2019
• First Posted (Actual): January 2, 2020

Study Record Updates

• Last Update Posted (Actual): May 13, 2020
• Last Update Submitted That Met QC Criteria: May 11, 2020
• Last Verified: May 1, 2020

More Information

Terms related to this study

• Keywords: Biofortification; Staple crops; Stable isotope studies
• Additional Relevant MeSH Terms: Metabolic Diseases; Hematologic Diseases; Anemia, Hypochromic; Iron Metabolism Disorders; Anemia, Iron-Deficiency; Anemia
• Other Study ID Numbers: 1267-USAI-000-ETH-01

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: No

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No