Aneesia Varkey1, Sarita Devi1, Arpita Mukhopadhyay1, Namrata G Kamat2, Maria Pauline3, Madan Dharmar4, Roberta R Holt5, Lindsay H Allen6, Tinku Thomas7, Carl L Keen8, Anura V Kurpad9. 1. Division of Nutrition, St. John's Research Institute, St. John's National Academy of Health Sciences, Bangalore, India. 2. Division of Epidemiology, Biostatistics and Population Health, St. John's Research Institute, St. John's National Academy of Health Sciences, Bangalore, India. 3. Department of Physiology, St. John's Medical College, St. John's National Academy of Health Sciences, Bangalore, India. 4. Betty Irene Moore School of Nursing and the Department of Pediatrics, University of California, Davis School of Medicine, Sacramento, CA, USA. 5. Department of Nutrition, University of California, Davis, Davis, CA, USA. 6. United States Department of Agriculture, Agricultural Research Service, Western Human Nutrition Research Center, Davis, CA, USA. 7. Department of Biostatistics, St. John's Medical College, St. John's National Academy of Health Sciences, Bangalore, India. 8. Department of Nutrition, University of California, Davis, Davis, CA, USA. Electronic address: clkeen@ucdavis.edu. 9. Department of Physiology, St. John's Medical College, St. John's National Academy of Health Sciences, Bangalore, India. Electronic address: a.kurpad@sjri.res.in.
Abstract
BACKGROUND & AIMS: Stunting in children is a comorbid condition in undernutrition that may be ameliorated by the provision of high-quality foods that provide protein and micronutrients. Addressing this problem in lower social economic environments requires, in part, affordable and scalable food-based solutions with efficacious food products. Towards this end, biochemical/metabolic indicators for fast-throughput screening of foods and their components are desired. A highly acceptable and economical micronutrient-fortified food product with different levels of legume protein was provided to stunted Indian children for one month, to determine change in their linear growth and explore associated biochemical, metabolomic and microbiome indicators. METHODS: A randomized controlled pilot trial was conducted with 100 stunted children (6-10 years of age) to elucidate metabolic and microbiome-based biomarkers associated with linear growth. They were randomized into 4 groups receiving 6, 8, 10 or 12 g of legume-based protein for one month. Anthropometry, blood biochemistry, aminoacidomics, acylcarnitomics and fecal microbiome were measured before and after feeding. RESULTS: No significant differences were observed between groups in height, height-for-age Z-score (HAZ) or BMI-for-age Z-score (BAZ); however, 38 serum metabolites were altered significantly (Bonferroni adjusted P < 0.1) in response to the interventions. IGF-1 (Insulin like Growth Factor-1) was positively (ρ > 0.2, P = 0.02), while serine and ornithine (ρ < -0.2, P = 0.08) were negatively associated with change in height. Leucine, isoleucine and valine positively correlated (P = 0.011, 0.023 and 0.007 respectively) with change in BAZ. Three Operational Taxonomic Units belonging to Bacteroidetes and Firmicutes (VIP score > 1.5) were significantly correlated with change in height. CONCLUSIONS: In this pilot trial, a number of fasting serum metabolomic and fecal microbiome signatures were associated with linear growth after a short-term dietary intervention. The alterations of these markers should be validated in long-term dietary intervention trials as potential screening indicators towards the development of food products that favor growth. This trial was registered at www.ctri.nic.in as CTRI/2016/12/007564.
BACKGROUND & AIMS: Stunting in children is a comorbid condition in undernutrition that may be ameliorated by the provision of high-quality foods that provide protein and micronutrients. Addressing this problem in lower social economic environments requires, in part, affordable and scalable food-based solutions with efficacious food products. Towards this end, biochemical/metabolic indicators for fast-throughput screening of foods and their components are desired. A highly acceptable and economical micronutrient-fortified food product with different levels of legume protein was provided to stunted Indian children for one month, to determine change in their linear growth and explore associated biochemical, metabolomic and microbiome indicators. METHODS: A randomized controlled pilot trial was conducted with 100 stunted children (6-10 years of age) to elucidate metabolic and microbiome-based biomarkers associated with linear growth. They were randomized into 4 groups receiving 6, 8, 10 or 12 g of legume-based protein for one month. Anthropometry, blood biochemistry, aminoacidomics, acylcarnitomics and fecal microbiome were measured before and after feeding. RESULTS: No significant differences were observed between groups in height, height-for-age Z-score (HAZ) or BMI-for-age Z-score (BAZ); however, 38 serum metabolites were altered significantly (Bonferroni adjusted P < 0.1) in response to the interventions. IGF-1 (Insulin like Growth Factor-1) was positively (ρ > 0.2, P = 0.02), while serine and ornithine (ρ < -0.2, P = 0.08) were negatively associated with change in height. Leucine, isoleucine and valine positively correlated (P = 0.011, 0.023 and 0.007 respectively) with change in BAZ. Three Operational Taxonomic Units belonging to Bacteroidetes and Firmicutes (VIP score > 1.5) were significantly correlated with change in height. CONCLUSIONS: In this pilot trial, a number of fasting serum metabolomic and fecal microbiome signatures were associated with linear growth after a short-term dietary intervention. The alterations of these markers should be validated in long-term dietary intervention trials as potential screening indicators towards the development of food products that favor growth. This trial was registered at www.ctri.nic.in as CTRI/2016/12/007564.
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