Summary of Study ST003203
This data is available at the NIH Common Fund's National Metabolomics Data Repository (NMDR) website, the Metabolomics Workbench, https://www.metabolomicsworkbench.org, where it has been assigned Project ID PR001997. The data can be accessed directly via it's Project DOI: 10.21228/M8KT6Q This work is supported by NIH grant, U2C- DK119886.
See: https://www.metabolomicsworkbench.org/about/howtocite.php
This study contains a large results data set and is not available in the mwTab file. It is only available for download via FTP as data file(s) here.
Study ID | ST003203 |
Study Title | Metabolomic investigation of tear fluid biomarkers obtained from participants enrolled in the BiZiFED nutrition study |
Study Summary | Zinc is an essential micronutrient, and its deficiency is particularly prevalent amongst the female population of Pakistan, leading to a substantial health burden on women of reproductive age and their children. Biofortification of wheat with zinc may offer a cost-effective strategy to attempt to improve nutritional status on a national scale. Biofortification with Zinc and Iron for Eliminating Deficiency (BiZiFED) is research program that aims to evaluate the impact of consuming zinc biofortified wheat flour on the zinc status and associated health outcomes of vulnerable communities northwest Pakistan. Of the health outcomes measured, tear biofluid was collected as a non-invasive method of determining whether zinc supplementation altered tear metabolomic biomarkers. In a crossover trial, 25 women of reproductive age received standard, non-biofortified wheat flour, and another 25 women received zinc-biofortified wheat flour for 8 weeks. At the end of this period, the nutritional intervention was switched for a further 8 weeks, whereby those individuals receiving the zinc-biofortified flour subsequently received the standard flour, whilst those receiving standard flour subsequently received the zinc-biofortified flour. The tear biofluid was collected using Schirmer strips after a 2-week baseline period and after 8 weeks and 16 weeks of the study. Metabolomic analysis was conducted using the MxP Quant 500 kit (Biocrates). Following multiple comparisons, four metabolites were significantly correlated with plasma zinc concentration, two demonstrating a positive correlation and two demonstrating a negative correlation. Five metabolites were significantly altered in response to zinc supplementation with biofortified wheat flour. These results highlight the potential of using tear biofluids as an alternative source for metabolomic biomarkers for the assessment of zinc status of individuals enrolled in nutritional studies. |
Institute | Institute for Global Food Security |
Last Name | Pan |
First Name | Xiaobei |
Address | 19 Chlorine Gardens, Belfast, Antrim, BT9 5DL, United Kingdom |
x.pan@qub.ac.uk | |
Phone | 02890975984 |
Submit Date | 2024-04-22 |
Raw Data Available | Yes |
Raw Data File Type(s) | wiff |
Analysis Type Detail | LC-MS |
Release Date | 2024-05-31 |
Release Version | 1 |
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Collection:
Collection ID: | CO003315 |
Collection Summary: | Tears were collected on Schirmer tear test strips (4701001, Haag-Streit UK Ltd., Essex, UK) from both eyes of the study participants. Briefly, the Schirmer strips were folded at the notch, before resting the rounded notch in the inferior conjunctival fornix (inside the lower eyelid) (FIGURE SUPPLEMENTARY 1A). Participants were given the option to close their eyes. The Schirmer strips were removed when the strips became saturated with tear fluid, or once 5 minutes had passed, whichever came first. The strips were shipped to QUB at ambient temperature, and stored at -80°C prior to analysis . |
Sample Type: | Tear |