{"id":54429,"date":"2025-09-09T09:00:27","date_gmt":"2025-09-09T16:00:27","guid":{"rendered":"https:\/\/www.salk.edu\/?post_type=disclosure&#038;p=54429"},"modified":"2025-09-17T08:54:43","modified_gmt":"2025-09-17T15:54:43","slug":"can-a-healthy-gut-microbiome-help-prevent-childhood-stunting","status":"publish","type":"disclosure","link":"https:\/\/www.salk.edu\/es\/news-release\/can-a-healthy-gut-microbiome-help-prevent-childhood-stunting\/","title":{"rendered":"Can a healthy gut microbiome help prevent childhood stunting?"},"content":{"rendered":"<p>LA JOLLA \u2014 Malnutrition is responsible for more than half of all deaths in children under the age of five worldwide. Those who survive can still experience lifelong consequences like cognitive and developmental delays, impaired academic performance, economic instability, and negative maternal health outcomes. This enormous public health issue demands solutions. The latest studies point to gut microbiome\u2014the diverse bacteria, viruses, and other microbes living in our intestines\u2014as a great place to start.<\/p>\n<figure id=\"attachment_54502\"  class=\"wp-caption alignright\"><a href=\"https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/Michael-PR-20250717-9E4A5113-scaled.jpg\"><img loading=\"lazy\" decoding=\"async\" width=\"458\" height=\"305\" class=\"img-responsive wp-image-54502 size-col-md-5\" src=\"https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/Michael-PR-20250717-9E4A5113-458x305.jpg\" alt=\"Salk Institute\" srcset=\"https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/Michael-PR-20250717-9E4A5113-458x305.jpg 458w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/Michael-PR-20250717-9E4A5113-300x200.jpg 300w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/Michael-PR-20250717-9E4A5113-1024x683.jpg 1024w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/Michael-PR-20250717-9E4A5113-768x512.jpg 768w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/Michael-PR-20250717-9E4A5113-1536x1025.jpg 1536w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/Michael-PR-20250717-9E4A5113-2048x1366.jpg 2048w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/Michael-PR-20250717-9E4A5113-147x98.jpg 147w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/Michael-PR-20250717-9E4A5113-585x390.jpg 585w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/Michael-PR-20250717-9E4A5113-553x369.jpg 553w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/Michael-PR-20250717-9E4A5113-750x500.jpg 750w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/Michael-PR-20250717-9E4A5113-767x512.jpg 767w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/Michael-PR-20250717-9E4A5113-945x630.jpg 945w\" sizes=\"auto, (max-width: 458px) 100vw, 458px\" \/><\/a><figcaption class=\"wp-caption-text\">From left: Jeremiah Minich, Todd Michael, and Nicholas Allsing.<br \/><a href=\"https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/Michael-PR-20250717-9E4A5113-scaled.jpg\" target=\"_blank\" rel=\"noopener\">Haga clic aqu\u00ed<\/a> para obtener una imagen en alta resoluci\u00f3n.<br \/>Cr\u00e9dito: Instituto Salk<\/figcaption><\/figure>\n<p>Salk Institute researchers searched for links between undernutrition (a form of malnutrition), microbiome health, and childhood growth in a group of toddlers from Malawi, an African nation with an especially high incidence of child stunting (35 percent). They collected fecal samples from eight children over the course of nearly a year to identify microbial patterns associated with child growth. The study found that children whose gut microbial genomes changed more over time tended to have poorer growth, suggesting that microbiome stability may be an important sign of good gut health.<\/p>\n<p>The researchers also used this new dataset to establish the first-ever pediatric undernutrition microbial genome catalog. The resource contains the full genetic profiles of 986 microbes\u2014collectively called a \u201cpangenome\u201d\u2014found in the fecal samples. This will be a critical public health resource for predicting, preventing, and treating malnutrition. The team also established a novel workflow to create this catalog, which saves researchers time and money while preserving data accuracy. Their method could be used to build genome resources for other health conditions, monitor environmental and agricultural microbiomes, track biodiversity, and enable metagenomic research in remote locations.<\/p>\n<p>The findings, made in collaboration with colleagues at Washington University School of Medicine in St. Louis and University of California San Diego, were published in <a href=\"https:\/\/www.cell.com\/cell\/fulltext\/S0092-8674(25)00975-4\" target=\"_blank\" rel=\"noopener\"><em>C\u00e9lula<\/em><\/a> on September 9, 2025.<\/p>\n<p>\u201cDespite a decade of research linking the microbiome with malnutrition, the genetic and biological factors have remained a mystery due to a lack of resolution on the microbes in the gut,\u201d says senior co-corresponding author <a href=\"https:\/\/www.salk.edu\/es\/scientist\/todd-michael\/\" target=\"_blank\" rel=\"noopener\">Todd Michael<\/a>, research professor at Salk. \u201cBy using cutting-edge genome sequencing and pangenomic approaches in a longitudinal design, we were able to pinpoint specific microbial changes linked to poor growth, opening the door to new diagnostics or therapeutics that could help address a crisis impacting more than 150 million children worldwide.\u201d<\/p>\n<p><strong>What we know about the link between malnutrition and the microbiome<\/strong><\/p>\n<figure id=\"attachment_54501\"  class=\"wp-caption alignleft\"><a href=\"https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-corn-scaled.jpeg\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"400\" class=\"img-responsive wp-image-54501 size-pr-300\" src=\"https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-corn-300x400.jpeg\" alt=\"\" srcset=\"https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-corn-300x400.jpeg 300w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-corn-225x300.jpeg 225w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-corn-768x1024.jpeg 768w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-corn-1152x1536.jpeg 1152w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-corn-1536x2048.jpeg 1536w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-corn-147x196.jpeg 147w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-corn-458x611.jpeg 458w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-corn-585x780.jpeg 585w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-corn-553x737.jpeg 553w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-corn-750x1000.jpeg 750w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-corn-767x1023.jpeg 767w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-corn-945x1260.jpeg 945w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-corn-scaled.jpeg 1920w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption class=\"wp-caption-text\">A woman roasts corn in Malawi.<br \/><a href=\"https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-corn-scaled.jpeg\" target=\"_blank\" rel=\"noopener\">Haga clic aqu\u00ed<\/a> para obtener una imagen en alta resoluci\u00f3n.<br \/>Credit: Jeremiah Minich<\/figcaption><\/figure>\n<p>One of the first studies to draw a causal link between the <a href=\"https:\/\/www.science.org\/doi\/abs\/10.1126\/science.1229000\" target=\"_blank\" rel=\"noopener\">microbiome, diet, and severe malnutrition<\/a> was published in 2013. Researchers transplanted microbiota from severely malnourished children into mice, fed them Malawian-like diets, and watched those mice lose weight like their human counterparts. This result traced a direct line from microbiome health to malnutrition. One author of that paper, Mark Manary, a professor of pediatrics at WashU Medicine, is a co-corresponding author on the new Salk study.<\/p>\n<p>In this latest study, the Salk researchers zoomed in on undernutrition, a type of malnutrition that results from poor nutrient uptake due to either an inability to process nutrients effectively or a nutrient-lacking diet. One broadly used metric of undernutrition is length-for-age scores (LAZ), which track children\u2019s heights compared to population-derived expectations for their age and sex.<\/p>\n<p>A low LAZ indicates insufficient growth for the child\u2019s age, and a consistently low or worsening LAZ over time is often associated with chronic gut inflammation or environmental intestinal dysfunction. Chronic gut inflammation, scientists have found, can result from dysfunctional microbes impairing the body\u2019s ability to process and absorb nutrients.<\/p>\n<p>Between the evidence that microbiome health and malnutrition directly impact each other, and research pointing to dysfunctional microbes as one cause for worsening undernutrition, the Salk team had two new goals: 1) create a comprehensive library accounting for the vast variety of gut microbiota present in children with worsening and improving LAZ, and 2) evaluate if the genetic content of the bacteria are predictive or associated with undernutrition.<\/p>\n<p><strong>Establishing a novel microbiome library<\/strong><\/p>\n<p>Geneticists piece together genomes using two types of technologies, called \u201cshort-read\u201d and \u201clong-read\u201d sequencing. Short-read sequencing breaks DNA into many small fragments that are 50 to 300 base pairs long, while long-read sequencing breaks DNA into fewer, larger fragments that are 5,000 to 4,000,000 base pairs long. Once broken up, the genome can be reassembled like putting together a puzzle. A long-read puzzle, as you might imagine, is much easier to put back together\u2014like completing a 10-piece puzzle rather than a 1,000-piece one.<\/p>\n<p>A gut microbiome may have hundreds of species or strains, like a single puzzle box with many smaller puzzles inside. Using long-read sequencing means opening that box to find 200 10-piece puzzles, rather than 200 1,000-piece ones. The Salk team pieced together long-read puzzles from the fecal samples of eight toddlers across a spectrum of improving and worsening LAZ scores.<\/p>\n<p>\u201cLongitudinal sampling and measurement, five times over 11 months, allowed for a unique assessment of both within- and between-child change over time in the microbiome and growth,\u201d said co-senior author Kevin Stephenson, assistant professor at WashU Medicine. \u201cThese data can offer insights otherwise obscured in simple cross-sectional analyses.\u201d<\/p>\n<p>With long-read sequencing, the team collected 50 times more complete microbiota genomes than would have been possible with short-read sequencing.<\/p>\n<p>&#8220;This would not have been possible with short-read technology,\u201d says first author Jeremiah Minich, a postdoctoral researcher in Michael\u2019s lab. \u201cWe found the most efficient, accurate, and cost-effective long-read workflow, applied that workflow to analyze 10- to 20-fold more human samples than anyone has analyzed before, and came out on the other end with a critically important genome resource for undernutrition.\u201d<\/p>\n<p>The final genome resource contains 986 complete microbial genomes, dozens of which are entirely novel. With this comprehensive library established, the next step was finding microbiota patterns specific to undernutrition.<\/p>\n<p><strong>What the team found <\/strong><\/p>\n<p>The researchers used novel pangenome comparison tools, partially developed in Michael\u2019s lab, to quickly scour their new library of 986 microbiota. Remarkably, within a given genus (one classification step above species), they found genetic differences in bacterial genomes between children with improving versus worsening growth in four genera (<em>Bifidobacterium, Megasphaera, Faecalibacterium, <\/em>y<em> Prevotella<\/em>).<\/p>\n<p>But more interesting than these specific bacteria was an observation about bacterial genome diversity over time.<\/p>\n<p>\u201cOur analysis showed that children with improving growth had stable microbial pangenomes within species, while those with growth faltering had unstable microbial pangenomes,\u201d says Manary. \u201cIt may then be possible to assess gut health and collect that crucial public health data by measuring gut microbiome genetic diversity.\u201d<\/p>\n<p><strong>What\u2019s next for malnutrition microbiome research<\/strong><\/p>\n<figure id=\"attachment_54500\"  class=\"wp-caption alignright\"><a href=\"https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-cows-scaled.jpeg\"><img loading=\"lazy\" decoding=\"async\" width=\"458\" height=\"344\" class=\"img-responsive wp-image-54500 size-col-md-5\" src=\"https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-cows-458x344.jpeg\" alt=\"\" srcset=\"https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-cows-458x344.jpeg 458w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-cows-300x225.jpeg 300w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-cows-1024x768.jpeg 1024w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-cows-768x576.jpeg 768w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-cows-1536x1152.jpeg 1536w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-cows-2048x1536.jpeg 2048w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-cows-147x110.jpeg 147w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-cows-585x439.jpeg 585w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-cows-553x415.jpeg 553w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-cows-750x563.jpeg 750w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-cows-767x575.jpeg 767w, https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-cows-945x709.jpeg 945w\" sizes=\"auto, (max-width: 458px) 100vw, 458px\" \/><\/a><figcaption class=\"wp-caption-text\">Cows in a field in Malawi.<br \/><a href=\"https:\/\/www.salk.edu\/wp-content\/uploads\/2025\/09\/PR-Michael-Cell-cows-scaled.jpeg\" target=\"_blank\" rel=\"noopener\">Haga clic aqu\u00ed<\/a> para obtener una imagen en alta resoluci\u00f3n.<br \/>Credit: Jeremiah Minich<\/figcaption><\/figure>\n<p>The study accomplishes four incredible feats across laboratory technology and public health. First, the team collected 10- to 20-fold more human clinical samples than any previous study in the field. Second, they assembled the first longitudinal, pediatric undernutrition microbial library, which contains 986 complete microbiota genomes. Third, they identified specific bacteria and genes amongst species linked to undernutrition and found microbial genome instability over time was associated with poor child growth. And finally, they optimized a long-read sequencing workflow that can now be applied across scientific disciplines.<\/p>\n<p>\u201cWhen applied in remote, field-based molecular laboratories, the genome sequencing and pangenomic approaches we developed can deliver real-time insights not only into pandemic surveillance, antibiotic resistance, and infectious disease, but also into agricultural productivity, environmental monitoring, and biodiversity conservation,\u201d says Michael. \u201cIt\u2019s a powerful technological advance that expands the reach of genomics and sets a new standard for scientific research in the field.\u201d<\/p>\n<p>Other authors include Nicholas Allsing, Nolan Hartwick, Allen Mamerto, and Tiffany Duong of Salk; M. Omar Din, Caitriona Brennan, Lauren Hansen, and Rob Knight of UC San Diego; Michael Tisza and Daniel McDonald of Baylor College of Medicine; Kenneth Maleta of Kamuzu University of Health Sciences in Malawi; Justin Shaffer of California State University; and Emilly Murray of Salk and Scripps Institution of Oceanography.<\/p>\n<p>The work was supported by the NOMIS Foundation, Tang Genomics Fund, National Science Foundation, and U.S. Agency for International Development.<\/p>","protected":false},"featured_media":54513,"template":"","faculty":[365],"disease-research":[123],"class_list":["post-54429","disclosure","type-disclosure","status-publish","has-post-thumbnail","hentry","faculty-todd-michael","disease-research-metabolism-and-diabetes"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Can a healthy gut microbiome help prevent childhood stunting? - Salk Institute for Biological Studies<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.salk.edu\/es\/news-release\/can-a-healthy-gut-microbiome-help-prevent-childhood-stunting\/\" \/>\n<meta property=\"og:locale\" content=\"es_MX\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Can a healthy gut microbiome help prevent childhood stunting? - Salk Institute for Biological Studies\" \/>\n<meta property=\"og:description\" content=\"LA JOLLA \u2014 Malnutrition is responsible for more than half of all deaths in children under the age of five worldwide. 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Those who survive can still experience lifelong consequences like cognitive and developmental delays, impaired academic performance, economic instability, and negative maternal health outcomes. This enormous public health issue demands solutions. 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