<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0016-3813</journal-id>
<journal-title><![CDATA[Gaceta médica de México]]></journal-title>
<abbrev-journal-title><![CDATA[Gac. Méd. Méx]]></abbrev-journal-title>
<issn>0016-3813</issn>
<publisher>
<publisher-name><![CDATA[Academia Nacional de Medicina de México A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0016-38132025000400001</article-id>
<article-id pub-id-type="doi">10.24875/gmm.25000049</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Relación entre la microbiota intestinal y la pérdida de masa muscular (sarcopenia) en adultos mayores: una revisión narrativa]]></article-title>
<article-title xml:lang="en"><![CDATA[Relationship between intestinal microbiota and muscle mass loss (sarcopenia) in older adults: a narrative review]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Meza]]></surname>
<given-names><![CDATA[Julio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mejía]]></surname>
<given-names><![CDATA[Iván I.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Noyola-Villalobos]]></surname>
<given-names><![CDATA[Héctor F.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[Marco A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ibarra]]></surname>
<given-names><![CDATA[Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Anáhuac México Facultad de Ciencias de la Salud Centro de Investigación en Ciencias de la Salud]]></institution>
<addr-line><![CDATA[Estado de México ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad del Ejército y Fuerza Aérea Centro de Investigación y Desarrollo del Ejército y Fuerza Aérea Mexicanos Laboratorio de Medicina Traslacional, Escuela Militar de Graduados de Sanidad]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Superior de Medicina ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad del Ejército y Fuerza Aérea Dirección de la Escuela Militar de Graduados de Sanidad ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad del Ejército y Fuerza Aérea Centro de Investigación y Desarrollo del Ejército y Fuerza Aérea Mexicanos Subdirección de Investigación, Escuela Militar de Graduados en Sanidad]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2025</year>
</pub-date>
<volume>161</volume>
<numero>4</numero>
<fpage>363</fpage>
<lpage>369</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0016-38132025000400001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0016-38132025000400001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0016-38132025000400001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes: Diversos estudios han destacado el papel de los metabolitos producidos por la microbiota en la regulación de la masa y la funcionalidad muscular, en particular a través del eje intestino-músculo.  Objetivo: Examinar los mecanismos mediante los cuales la microbiota intestinal interactúa con el músculo esquelético y compilar las estrategias terapéuticas más recientes basadas en la suplementación con probióticos para corregir las alteraciones en la microbiota (disbiosis) y así prevenir o tratar la sarcopenia en pacientes geriátricos.  Material y métodos: Se realizó una búsqueda sistemática de estudios en las bases de datos PubMed y NIH, incluyendo análisis sistemáticos, metaanálisis y ensayos clínicos, enfocados en pacientes geriátricos con sarcopenia o síndrome de fragilidad en quienes se implementara una suplementación con probióticos.  Resultados: Las intervenciones con probióticos han mostrado resultados prometedores en modelos animales para limitar la sarcopenia y la caquexia, pero los datos disponibles en humanos son limitados y variables.  Conclusiones: Es necesario realizar investigaciones que incluyan una muestra amplia y diversa para evaluar el impacto de la suplementación con probióticos en diferentes grupos demográficos y estados de salud, con el propósito de diseñar una nutrición personalizada.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: Several studies have highlighted the role of metabolites produced by the microbiota in regulating muscle mass and functionality, particularly through the gut-muscle axis.  Objective: To examine the mechanisms by which the gut microbiota interacts with skeletal muscle and to compile the most recent therapeutic strategies based on probiotic supplementation to correct alterations in the microbiota (dysbiosis) and thus prevent or treat sarcopenia in geriatric patients.  Material and methods: A systematic search for studies was conducted in the PubMed and NIH databases, including systematic reviews, meta-analyses, and clinical trials, focused on geriatric patients with sarcopenia and/or frailty syndrome in which probiotic supplementation has been implemented.  Results: Probiotic interventions have shown promising results in animal models to limit sarcopenia and cachexia, but the data available in humans are limited and variable.  Conclusions: Research involving a broad and diverse sample is needed to evaluate the impact of probiotic supplementation on different demographic groups and health statuses, with the aim of designing personalized nutrition.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Sarcopenia]]></kwd>
<kwd lng="es"><![CDATA[Microbiota]]></kwd>
<kwd lng="es"><![CDATA[Músculo esquelético]]></kwd>
<kwd lng="es"><![CDATA[Probióticos]]></kwd>
<kwd lng="es"><![CDATA[Disbiosis]]></kwd>
<kwd lng="en"><![CDATA[Sarcopenia]]></kwd>
<kwd lng="en"><![CDATA[Microbiota]]></kwd>
<kwd lng="en"><![CDATA[Skeletal muscle]]></kwd>
<kwd lng="en"><![CDATA[Probiotics]]></kwd>
<kwd lng="en"><![CDATA[Dysbiosis]]></kwd>
</kwd-group>
</article-meta>
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