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ARS Home » Plains Area » Houston, Texas » Children's Nutrition Research Center » Research » Research Project #436054

Research Project: Microbiota and Nutritional Health

Location: Children's Nutrition Research Center

Project Number: 3092-51000-062-000-D
Project Type: In-House Appropriated

Start Date: Mar 4, 2019
End Date: Mar 3, 2024

A number of pressing nutritional issues face mankind. In the US and other developed countries strategies are needed to address the ever-increasing epidemic of obesity and related chronic diseases and in impoverished countries severe acute malnutrition directly contributes to deaths of more than a million children under the age of 5 each year globally. To address these concerns researchers will conduct the following objectives: 1) compare the effects of inulin and fructo-oligosaccharides against a maltodextrin placebo in obese children, using a double-blind randomized controlled trial, to study weight loss, fecal microbiota and their functions; 2) removed due to scientists departure; and 3) conduct a clinical trial adding black-eyed peas to diets of young children at risk for stunting. Determine efficacy in reducing stunting and analyze fecal sample to understand potential mechanisms by which the food supplement ameliorates stunting. Assess dietary compliance in a novel, quantitative manner using a urinary biomarker for black eyed peas. Currently quercetin and ferulic acid are candidates for this biomarker. Additionally, breastfeeding has enormous health benefits to both infant and mother and continued efforts to understand the biology of mammary development and lactation are important to improving both infant and maternal health. Thus we will undertake this objective to further our knowledge: 4) select inbred mouse strains with phenotypic extremes in milk production will be used to: a) identify genomic variants along with intestinal and mammary-expressed genes that differentiate low and high milk production, and b) determine the extent to which genome-driven differences in milk production and mammary gene expression are directly mediated through host-dependent differences in the intestinal and/or mammary tissue microbiome.

A multi-discipline approach will be undertaken to address these nutritional concerns. Hispanic children ages 7-18 years of age will be enrolled in the study, anthropometric measurements and blood draws will be taken and analyzed. Urine and stool samples will be collected and analysis will be performed to account for inulin and B-defensin. Researchers will also assess the pre- and post-treatment serum samples from a recently concluded study of 1-carbon metabolites. We will perform laboratory procedures to assess DNA methylation from the samples collected. Scientists will conduct a randomized, double blind, clinical controlled trial in south central Mali among healthy 6-12 month old children by adding black-eyed peas to diets of young children at risk for stunting. Scientists will analyze urinary and fecal samples to understand potential mechanisms by which the food supplement reduces stunting. And finally, researchers will use genome-wide pathway association study approaches in conjunction with bioinformatics tools to predict the functional consequences of the private alleles within the lactation phenome strains to better understand the phenotypic expression of increased lactation.