<?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>0120-9957</journal-id>
<journal-title><![CDATA[Revista colombiana de Gastroenterología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Col Gastroenterol]]></abbrev-journal-title>
<issn>0120-9957</issn>
<publisher>
<publisher-name><![CDATA[Asociación Colombiana de Gastroenterología  ]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-99572016000200001</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Factores de riesgo asociados a hígado graso de origen no alcohólico en una población del Caribe Colombiano]]></article-title>
<article-title xml:lang="en"><![CDATA[Risk Factors Associated with Nonalcoholic Fatty Liver Disease in a Colombian Caribbean Population]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lambis A]]></surname>
<given-names><![CDATA[Lina]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Solana T]]></surname>
<given-names><![CDATA[José Belisario]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gastelbondo P]]></surname>
<given-names><![CDATA[Bertha]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Romero S]]></surname>
<given-names><![CDATA[Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Garrido C]]></surname>
<given-names><![CDATA[Daniela]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Puello R]]></surname>
<given-names><![CDATA[Walter]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García E]]></surname>
<given-names><![CDATA[María C]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Suarez C]]></surname>
<given-names><![CDATA[Amileth]]></given-names>
</name>
<xref ref-type="aff" rid="A04"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad de Cartagena Facultad de Medicina Grupo Prometeus & Biomedicana aplicada a las ciencias clínicas]]></institution>
<addr-line><![CDATA[Cartagena ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Hospital Universitario del Caribe Unidad de hígado vías biliares ]]></institution>
<addr-line><![CDATA[Cartagena ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A03">
<institution><![CDATA[,Universidad de Cartagena Facultad de Medicina ]]></institution>
<addr-line><![CDATA[Cartagena ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="A04">
<institution><![CDATA[,Universidad de Cartagena Facultad de Medicina Grupo Prometeus & Biomedicana aplicada a las ciencias clínicas]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>30</day>
<month>06</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>30</day>
<month>06</month>
<year>2016</year>
</pub-date>
<volume>31</volume>
<numero>2</numero>
<fpage>89</fpage>
<lpage>95</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-99572016000200001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-99572016000200001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-99572016000200001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[La enfermedad hepática grasa no alcohólica NAFLD (Non-alcoholic fatty liver disease) es un problema de salud, así lo demuestran las diversas investigaciones alrededor del mundo, donde se evidencia una alta prevalencia de la patología. El objetivo del estudio piloto fue describir en términos de variables demográficas, epidemiológicas y bioquímicas la relación de factores de riesgo asociados a NAFLD de una muestra de pacientes que acudieron a la sección de Hígado y vías biliares del Hospital Universitario del Caribe (Cartagena, Colombia). El estudio piloto fue descriptivo prospectivo, fueron revisadas historias clínicas para análisis de variables epidemiológicas-demográficas y valorados por medición espectrofotométrica la actividad enzimática de transaminasas para la relación De Ritis (AST/ALT), niveles de colesterol y triglicéridos. Los resultados sugieren que la población subdividida en obesos, diabetes mellitus, hipertensos/obesos, diabetes/obesos y principalmente del género femenino presenta mayor riesgo de padecer hígado graso, con lo que amerita un estudio bioquímico molecular y un diagnóstico definitivo de NAFLD en la población de estudio]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Nonalcoholic fatty liver disease (NAFLD) is a health problem that has been demonstrated by research from everywhere around the world where the disease's prevalence appears to be high. The aim of this pilot study was to describe the relationship of risk factors associated with NAFLD in terms of demographic, epidemiological and biochemical variables. Patients included in the study were drawn from people who came to the liver and biliary tract section of the Hospital Universitario del Caribe in Cartagena, Colombia. This was a prospective and descriptive pilot study that reviewed medical records for analysis of epidemiological and demographic variables. It assessed spectrophotometric measurement of transaminases for determination of De Ritis ratios (AST/ALT), and relationship to levels of cholesterol and triglycerides. The results suggest that risks of developing NAFLD were higher among women, among patients who were obese, among patients who had diabetes mellitus, among patients who had hypertension and obesity, and among patients who had diabetes combined with obesity. Patients at risk merit biochemical molecular study and a definitive diagnosis]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Hígado graso]]></kwd>
<kwd lng="es"><![CDATA[NAFLD]]></kwd>
<kwd lng="es"><![CDATA[gastroenterología]]></kwd>
<kwd lng="en"><![CDATA[Fatty liver]]></kwd>
<kwd lng="en"><![CDATA[NAFLD]]></kwd>
<kwd lng="en"><![CDATA[gastroenterology]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  <FONT FACE="Verdana" SIZE=4>    <p align="center"><b>Factores de riesgo asociados a h&iacute;gado graso de origen no alcoh&oacute;lico en una poblaci&oacute;n del Caribe Colombiano</b></p>     <p align="center"><b>Risk Factors Associated with Nonalcoholic   Fatty Liver Disease in a Colombian Caribbean Population</b></p></FONT> <FONT FACE="Verdana" SIZE=2>    <p align="center">Lina Lambis A. (1), Jos&eacute; Belisario Solana T. MD. (2), Bertha   Gastelbondo P. (1), Daniel Romero S. (1), Daniela Garrido C. (1), Walter Puello   R. MD (3), Mar&iacute;a C. Garc&iacute;a E. (1)  Amileth Suarez C. (4)</p>     <p>(1) Grupo Prometeus &amp; Biomedicina aplicada a las   Ciencias cl&iacute;nicas. Laboratorio de Bioqu&iacute;mica, Facultad de Medicina, Universidad   de Cartagena. Cartagena, Colombia.</p>     <p>(2) M&eacute;dico Unidad de H&iacute;gado V&iacute;as biliares, Hospital   Universitario del Caribe. Cartagena, Colombia.</p>     <p>(3) Residente de Cirug&iacute;a, Facultad de Medicina, Universidad   de Cartagena. Cartagena, Colombia.</p>     <p>(4) Directora del grupo Prometeus &amp; Biomedicina aplicada   a las ciencias cl&iacute;nicas. Docente de Bioqu&iacute;mica (PhD), Facultad de Medicina,   Universidad de Cartagena, Colombia. Mail: <a href="mailto:asuarezc1@unicartagena.edu.co">asuarezc1@unicartagena.edu.co</a></p>     <p>Fecha recibido:    28-05-15  Fecha aceptado:  18-04-16</p>     <p><strong>Resumen</strong></p>     ]]></body>
<body><![CDATA[<p>La enfermedad hep&aacute;tica grasa no alcoh&oacute;lica NAFLD (Non-alcoholic   fatty liver disease) es un problema de salud, as&iacute; lo demuestran las diversas   investigaciones alrededor del mundo, donde se evidencia una alta prevalencia de   la patolog&iacute;a. El objetivo del estudio piloto fue describir en t&eacute;rminos de   variables demogr&aacute;ficas, epidemiol&oacute;gicas y bioqu&iacute;micas la relaci&oacute;n de factores   de riesgo asociados a NAFLD de una muestra de pacientes que acudieron a la   secci&oacute;n de H&iacute;gado y v&iacute;as biliares del Hospital Universitario del Caribe   (Cartagena, Colombia). El estudio piloto fue descriptivo prospectivo, fueron   revisadas historias cl&iacute;nicas para an&aacute;lisis de variables   epidemiol&oacute;gicas-demogr&aacute;ficas y valorados por medici&oacute;n espectrofotom&eacute;trica la   actividad enzim&aacute;tica de transaminasas para la relaci&oacute;n De Ritis (AST/ALT),   niveles de colesterol y triglic&eacute;ridos. Los resultados sugieren que la poblaci&oacute;n   subdividida en obesos, diabetes mellitus, hipertensos/obesos, diabetes/obesos y   principalmente del g&eacute;nero femenino presenta mayor riesgo de padecer h&iacute;gado   graso, con lo que amerita un estudio bioqu&iacute;mico molecular y un diagn&oacute;stico   definitivo de NAFLD en la poblaci&oacute;n de estudio.</p>     <p><strong>Palabras clave</strong></p>     <p>H&iacute;gado graso, NAFLD, gastroenterolog&iacute;a.</p>     <p><strong>Abstract</strong></p>     <p>Nonalcoholic fatty liver disease (NAFLD) is a health problem   that has been demonstrated by  research from everywhere around the world where   the disease's prevalence appears to be high. The aim of this pilot study was to   describe the relationship of risk factors associated with NAFLD in terms of   demographic, epidemiological and biochemical variables. Patients included in   the study were drawn from people who came to the liver and biliary tract   section of the Hospital Universitario del Caribe in Cartagena, Colombia. This   was a prospective and descriptive pilot study that reviewed medical records for   analysis of epidemiological and demographic variables. It assessed   spectrophotometric measurement of transaminases for determination of De Ritis   ratios (AST/ALT), and relationship to levels of cholesterol and triglycerides.   The results suggest that risks of developing NAFLD were higher among women,   among patients who were obese, among patients who had diabetes mellitus, among   patients who had hypertension and obesity, and among patients who had diabetes   combined with obesity. Patients at risk merit biochemical molecular study and a   definitive diagnosis.  </p>     <p><strong>Keywords</strong></p>     <p>Fatty liver, NAFLD, gastroenterology.</p>     <p><strong>INTRODUCCI&Oacute;N</strong></p>     <p>La enfermedad hep&aacute;tica grasa no alcoh&oacute;lica NAFLD (Non-alcoholic   fatty liver disease, h&iacute;gado graso o esteatosis hep&aacute;tica no alcoh&oacute;lica) es una   condici&oacute;n cl&iacute;nico-patol&oacute;gica caracterizada por la infiltraci&oacute;n de grasa en los   hepatocitos del par&eacute;nquima hep&aacute;tico en un porcentaje que excede del 5% al 10%   de peso y anormalidad persistente de las enzimas hep&aacute;ticas, adem&aacute;s del consumo   de alcohol no significativo. Tambi&eacute;n es considerada la manifestaci&oacute;n hep&aacute;tica   del s&iacute;ndrome metab&oacute;lico (1,2). La prevalencia de NAFLD est&aacute; relacionada con la   obesidad y resistencia insulina; var&iacute;a dependiendo del &aacute;rea geogr&aacute;fica (<a href="#tabla1">Tabla 1</a>),   pero se puede estimar un rango entre 20%-30% a nivel mundial, principalmente en   pa&iacute;ses industrializados del mundo occidental (3).</p>     <p align="center"><img src="img/revistas/rcg/v31n2/v31n2a01t1.jpg" width="430" height="359"><a name="tabla1"></a></p>     ]]></body>
<body><![CDATA[<p>Cl&iacute;nicamente, la NAFLD presenta un amplio espectro   patol&oacute;gico que incluye una simple esteatosis macrovesicular, h&iacute;gado graso   acompa&ntilde;ado por inflamaci&oacute;n, fibrog&eacute;nesis y necrosis hepatocelular (esteatosis   hep&aacute;tica no alcoh&oacute;lica), lo que aumenta el riesgo a fibrosis perdiendo la   funci&oacute;n del h&iacute;gado; en algunos casos desarrollo del hepatocarcinoma (15-20).   Entre los factores de riesgo asociados a esta patolog&iacute;a est&aacute;n estilos de vida   como dieta y ejercicio, resistencia a insulina, diabetes tipo II, dislipidemia,   edad, g&eacute;nero y factores gen&eacute;ticos (21). Es de resaltar que la obesidad y la   resistencia a la insulina se consideran los factores de riesgo asociados m&aacute;s   frecuentemente a la NAFLD; as&iacute;, el grado de esteatosis puede ser correlacionado   con &iacute;ndice de masa corporal (IMC) y la diabetes puede ser un factor   independiente de predictor de NAFLD o cualquier da&ntilde;o hep&aacute;tico.</p>     <p>El mecanismo bioqu&iacute;mico es complejo e incluye acumulo de   triglic&eacute;ridos, resistencia a insulina, desregulaci&oacute;n del metabolismo de   l&iacute;pidos, estr&eacute;s oxidativo por disfunci&oacute;n mitocondrial y peroxidaci&oacute;n lip&iacute;dica,   as&iacute; como disfunci&oacute;n de respuesta inmune innata. Estos procesos se encuentran   asociados con m&uacute;ltiples polimorfismos en genes, que est&aacute;n vinculados con esos   procesos (22,23). Por tanto, la gen&eacute;tica puede ser un determinante de riesgo y   severidad del desarrollo de h&iacute;gado graso (24). Para el diagn&oacute;stico, las pruebas   bioqu&iacute;micas en particular las transaminasas, triglic&eacute;ridos y colesterol son   pruebas sensibles para la esteatosis simple, pero se requiere confirmar con   im&aacute;genes histol&oacute;gicas o pruebas de imagenolog&iacute;a (ultrasonograf&iacute;a, tomograf&iacute;a   computarizada, resonancia magn&eacute;tica, fibroscan, etc.).</p>     <p>Uno de los par&aacute;metros que ha estado en el olvido, pero que   su utilidad fue demostrada en 1957 por Fernando De Ritis, es la relaci&oacute;n   AST/ALT (aspartato-aminotransferasa (EC 2.6.1.1)/alanina-aminotransferasa (EC   2.6.1.2) (25), el cual predice da&ntilde;o hepatocelular. La ALT est&aacute; presente solo en   el citoplasma, mientras que la AST presenta dos isoformas, la citoplasm&aacute;tica   (cAST) y la mitocondrial (mAST); estas &uacute;ltimas son inmunol&oacute;gicamente distintas,   la mAST es la isoenzima m&aacute;s prevalente,   con aproximadamente el 80% del total de actividad en h&iacute;gado humano (26). La   actividad de estas transaminasas es reflejo de la actividad metab&oacute;lica en los   tejidos en los cuales se expresan, y representan la relaci&oacute;n importante entre   el metabolismo de carbohidratos y prote&iacute;nas <a href="#figura1">(Figuras 1</a> y <a href="#figura2">2</a>). La relaci&oacute;n   AST/ALT (De Ritis ratio) es un valor &uacute;til de apoyo para predecir un indicio muy   probable de da&ntilde;o hep&aacute;tico que tiende a cirrosis, debido a que cuando hay muerte   hepatocelular se incrementan los niveles s&eacute;ricos de AST, comparado con ALT, y   refleja el da&ntilde;o de la proporci&oacute;n celular siempre que AST sea muy superior a   ALT. As&iacute;, relaciones superiores a 2,0 reflejan liberaci&oacute;n intracelular de la   enzima (mAST y cAST) y por tanto da&ntilde;o hepatocelular.</p>     <p align="center"><img src="img/revistas/rcg/v31n2/v31n2a01f1.jpg" width="430" height="328"><a name="figura1"></a></p>     <p align="center"><img src="img/revistas/rcg/v31n2/v31n2a01f2.jpg" width="430" height="379"><a name="figura2"></a></p>     <p>El objetivo de esta primera parte del estudio piloto fue   valorar en t&eacute;rminos demogr&aacute;ficos, epidemiol&oacute;gicos y bioqu&iacute;micos la relaci&oacute;n de   factores de riesgo asociados que conducen a NAFLD; en los pacientes que   acudieron a la secci&oacute;n de H&iacute;gado y v&iacute;as biliares del Hospital Universitario del   Caribe, Cartagena.</p>     <p><strong>METODOLOG&Iacute;A</strong></p>     <p>En este estudio piloto descriptivo prospectivo fueron   incluidos 105 pacientes adultos con posibles factores de riesgo asociados a   h&iacute;gado graso que acudieron a la secci&oacute;n de cirug&iacute;a de h&iacute;gado y v&iacute;as biliares   del hospital Universitario del Caribe, durante el per&iacute;odo de septiembre de 2014   – abril de 2015. Los criterios de exclusi&oacute;n fueron: consumo de alcohol (20   g/d&iacute;a para hombres y 10 g/d&iacute;a para mujeres), hepatitis viral, medicamentos   hepatot&oacute;xicos, hemocromatosis y enfermedad de Wilson. Fueron determinadas las   caracter&iacute;sticas demogr&aacute;ficas, el motivo de remisi&oacute;n del paciente, los   antecedentes referidos en la historia cl&iacute;nica, los datos del examen f&iacute;sico y   las pruebas de laboratorio. Para el an&aacute;lisis estad&iacute;stico se analiz&oacute; la   informaci&oacute;n mediante estad&iacute;stica descriptiva, se calcularon medidas de   tendencia central, porcentajes y frecuencias absolutas; se tom&oacute; un error del   5%. Se utiliz&oacute; Graphpad prism para el an&aacute;lisis de los datos. Todos los datos de   este estudio fueron conducidos de acuerdo con los principios declarados en la   XVIII Asamblea M&eacute;dica Mundial (Helsinki, 1964).</p>     <p><strong>An&aacute;lisis bioqu&iacute;mico</strong></p>     <p>La muestra de sangre fue obtenida por punci&oacute;n venosa, se   recolect&oacute; en tubos que conten&iacute;an EDTA como anticoagulante; para obtenci&oacute;n del   plasma las muestras se centrifugaron por 10 minutos a 2500 revoluciones por   minuto (rpm) a 4 &deg;C. Los ensayos se realizaron en el Laboratorio de   Investigaci&oacute;n de Bioqu&iacute;mica de la Facultad de Medicina. La determinaci&oacute;n de   actividad enzim&aacute;tica de transaminasas, triglic&eacute;ridos y colesterol se realiz&oacute;   seg&uacute;n indicaciones del fabricante (Biosystems). Los valores de referencia   establecidos para valorar actividad enzim&aacute;tica de AST y ALT, colesterol y   triglic&eacute;ridos fueron 40 y 41 U/L, 200&nbsp;mg/dL,   150&nbsp;mg/dL respectivamente. La actividad enzim&aacute;tica (U)   fue establecida como concentraci&oacute;n de enzima que cataliza la conversi&oacute;n de 1 µmol   de sustrato en un minuto. Todas las determinaciones se realizaron por   triplicado en el equipo Tecan infinite M200&reg;.</p>     ]]></body>
<body><![CDATA[<p><strong>RESULTADOS</strong></p>     <p>En este estudio fueron tomadas 105 historias cl&iacute;nicas para   el an&aacute;lisis descriptivo de algunos factores de riesgo que conducen a h&iacute;gado   graso, que corresponden a pacientes que ingresan a la Unidad de h&iacute;gado y v&iacute;as   biliares del Hospital Universitario del Caribe. El rango de edad de los   pacientes incluidos en el estudio fue j&oacute;venes (18-23 a&ntilde;os), adultos (24-59   a&ntilde;os) y adulto mayor (mayores   de 60 a&ntilde;os). Los resultados preliminares muestran que la poblaci&oacute;n mayoritaria   est&aacute; representada por individuos adultos con un 52%. Aun as&iacute;, es preocupante el   18% que representa la poblaci&oacute;n joven del estudio. Por otra parte, el 85% de   los individuos del estudio corresponde al g&eacute;nero femenino y demogr&aacute;ficamente el   82% de toda la poblaci&oacute;n vive en &aacute;rea urbana (<a href="#tabla2">Tabla 2</a>). Dentro de los factores   de riesgo asociados a h&iacute;gado graso no alcoh&oacute;lico se encontraron diabetes mellitus   tipo II (DM), obesidad e hipertensi&oacute;n arterial (HT). Se observ&oacute; una frecuencia   de igual importancia para todas las condiciones, fue 28% para obesidad, 20% DM   y 38% para hipertensi&oacute;n arterial; se tomaron valores absolutos sin combinar las   patolog&iacute;as. La <a href="#figura3">Figura 3</a> muestra el porcentaje y asocia grupos con combinaci&oacute;n   de dos patolog&iacute;as, la distribuci&oacute;n queda as&iacute;:   28% a los pacientes obesos, 20% DM, 17%   HT/obeso y 35% DM/HT.</p>     <p align="center"><img src="img/revistas/rcg/v31n2/v31n2a01t2.jpg" width="430" height="486"><a name="tabla2"></a></p>     <p align="center"><img src="img/revistas/rcg/v31n2/v31n2a01f3.jpg" width="430" height="378"><a name="figura3"></a></p>     <p>Con respecto a los marcadores bioqu&iacute;micos, para la relaci&oacute;n   de Ritis (AST/ALT) se obtuvo un valor significativamente superior a 1,0 (p   &lt;0,05), triglic&eacute;ridos por encima de 160 mg/dL y colesterol menor de 200   mg/dL en todos los factores asociados a h&iacute;gado graso abordados. La poblaci&oacute;n de   pacientes incluidos en el estudio muestra, seg&uacute;n las caracter&iacute;sticas de la <a href="#tabla3">Tabla   3</a>, que la poblaci&oacute;n adulta caracterizada como HT/obeso presenta mayor &iacute;ndice De   Ritis y un promedio de &iacute;ndice de masa corporal de 36,6.</p>     <p align="center"><img src="img/revistas/rcg/v31n2/v31n2a01t3.jpg" width="580" height="172"><a name="tabla3"></a></p>     <p><strong>DISCUSI&Oacute;N</strong></p>     <p>La enfermedad de h&iacute;gado graso es extensamente estudiada a   nivel mundial por ser un problema de salud p&uacute;blica importante. La incidencia se   ha estimado en uno de cada tres adultos en pa&iacute;ses desarrollados y puede afectar   a los individuos a cualquier edad. Se ha demostrado una prevalencia importante   en un estudio prospectivo de cohorte en pacientes adultos asintom&aacute;ticos usando   ultrasonido (US) y biopsia hep&aacute;tica, en el cual se encontr&oacute; una prevalencia de   NAFLD de 46% (28,29). La etnia tambi&eacute;n influye en la prevalencia de NAFLD (30).   As&iacute;, la poblaci&oacute;n de Am&eacute;rica del Sur ha sido registrada con el mayor n&uacute;mero de   individuos con esta patolog&iacute;a a nivel mundial (31,32). De acuerdo con los   resultados, los principales factores de riesgo asociados a NAFLD en la   poblaci&oacute;n son: obesidad, DM, HT, &iacute;ndice Ritis &gt;1,0 y dislipidemia; as&iacute; como   se reporta en las gu&iacute;as de pr&aacute;ctica cl&iacute;nica para NAFLD (Evidence-based clinical   practice guidelines for nonalcoholic fatty liver disease/nonalcoholic   steatohepatitis), con lo cual amerita la realizaci&oacute;n de un estudio   bioqu&iacute;mico-molecular amplio, que incluya diagn&oacute;stico de NAFLD para mayor   comprensi&oacute;n de esta patolog&iacute;a (33).</p>     <p>Si bien ha sido reportada una relaci&oacute;n lineal entre la edad   y la frecuencia de los factores asociados y confirmados de NAFLD, pero en   nuestro estudio no fue as&iacute;. Dos posibles razones podr&iacute;an ser la muerte temprana   por enfermedad hep&aacute;tica y la baja cobertura de salud de la poblaci&oacute;n. Por otra   parte, el hecho de que el 18% de los pacientes con enfermedad hep&aacute;tica de   h&iacute;gado graso sean individuos j&oacute;venes, es un dato inquietante que repercutir&iacute;a   en la historia natural de esta patolog&iacute;a, considerando que su h&iacute;gado estar&iacute;a   expuesto durante un mayor tiempo a alteraciones metab&oacute;licas, que finalmente   podr&iacute;an llevar a un incremento del riesgo de progresi&oacute;n y complicaci&oacute;n de esta   patolog&iacute;a.</p>     <p>Adicionalmente, los resultados muestran mayor frecuencia de   la enfermedad en mujeres residentes de &aacute;reas urbanas, datos similares se   reportan en otras investigaciones en Colombia (34). Estos hallazgos podr&iacute;an   estar asociados con altos niveles de estr&eacute;s, disminuci&oacute;n de calidad de vida e   inadecuados h&aacute;bitos alimenticios; aspectos que han sido valorados tambi&eacute;n para   explicar el alto riesgo cardiovascular de las mujeres en la misma regi&oacute;n (35).   Adem&aacute;s, observar mayoritariamente en el &aacute;rea urbana estas caracter&iacute;sticas,   asociadas a NAFLD, es un indicio indirecto de trastorno hep&aacute;tico que siempre ha   estado vinculado a estr&eacute;s y a pa&iacute;ses desarrollados, m&aacute;s que a la ubicaci&oacute;n   geogr&aacute;fica. Esto es debido al estilo de vida y de alimentaci&oacute;n de la poblaci&oacute;n   (1). La poblaci&oacute;n estudiada se caracteriz&oacute; por patolog&iacute;as como diabetes mellitus,   obesidad, hipertensi&oacute;n arterial y combinaciones de estas. Otros investigadores   han reportado enfermedades asociadas a NAFLD e incluyen las reportadas en este   estudio piloto (2).</p>     ]]></body>
<body><![CDATA[<p>La frecuencia relativa de estas patolog&iacute;as asociadas a NAFLD   fue similar para todos los grupos, con mayor incidencia en obesidad; este   factor es uno de los m&aacute;s influyentes y as&iacute; es resaltado en un reporte de Jap&oacute;n,   que encontr&oacute; una prevalencia de 25% aproximado en pacientes con NAFLD (15).   Evidentemente var&iacute;a en diferentes regiones por la cultura y estilos de vida.   Aun as&iacute;, otros investigadores consideran que no siempre todos los obesos   desarrollan NAFLD, pero resaltan su importancia cuando se suma a otros factores   como diabetes, como evento importante a h&iacute;gado graso (18). Es de resaltar que   la organizaci&oacute;n mundial de la salud para Latino Am&eacute;rica reporta la existencia   de m&aacute;s del 15% de la poblaci&oacute;n obesa en Argentina, Colombia, Per&uacute;, Paraguay y   Uruguay. Tambi&eacute;n otros estudios han resaltado que en Latinoam&eacute;rica es m&aacute;s   susceptible a obesidad y diabetes tipo II, por la tendencia de estilo de vida   sedentario y consumo de comidas de alto nivel de grasa (17). Adicionalmente, es   necesario destacar que la obesidad est&aacute; correlacionada con prevalencia y   severidad de NAFLD; as&iacute; lo demuestran recientes estudios americanos, donde la   prevalencia de obesidad-severidad NAFLD fue de 23,5% en hombres y 29,7% en   mujeres (16).</p>     <p>Otro factor de riesgo relacionado, para el desarrollo de   enfermedades cr&oacute;nicas del h&iacute;gado, es la diabetes mellitus. Se estima la   prevalencia de NAFLD en 60%-76% en esta condici&oacute;n, con lo cual la poblaci&oacute;n   estudiada acent&uacute;a su probabilidad de NAFLD porque la resistencia a la insulina   y el estr&eacute;s oxidativo tienen un papel muy importante en el desarrollo y   progresi&oacute;n de NAFLD, debido a la alta concentraci&oacute;n de insulina que puede   causar falla para suprimir el flujo de &aacute;cidos grasos. Todos estos factores   asociados a NAFLD confirman la estricta asociaci&oacute;n fisiopatol&oacute;gica entre el   desequilibrio del metabolismo de l&iacute;pidos y glucosa establecidos bioqu&iacute;micamente   (19,21).</p>     <p>Si bien en nuestro estudio el 20% de la poblaci&oacute;n con posibilidad   de riesgo de NAFLD present&oacute; DM, es indudable que el desbalance metab&oacute;lico de   l&iacute;pidos y carbohidratos que existe es de alta influencia para el   establecimiento de NAFLD, con lo que se hace necesario confirmar este   diagn&oacute;stico. En los resultados, se muestra que los diferentes grupos no   presentan un puntaje significativo para fibrosis hep&aacute;tica (datos no mostrados),   dato que concuerda con los valores de TG y colesterol. Los TG, se consideran   hepatoprotectores en el contexto de NAFLD, protegen de la lipotoxicidad, por   proveer un mecanismo de buffer para la acumulaci&oacute;n de &aacute;cidos grasos libres,   pero esto no es inofensivo, ya que la esteatosis se ha asociado con obesidad,   dislipidemia, resistencia a insulina e hipertensi&oacute;n. A diferencia de los TG, el   colesterol est&aacute; asociado NASH. Un estudio in vitro en Caenorhabditis elegans   demostr&oacute; que el colesterol libre, m&aacute;s que los triglic&eacute;ridos y el acumulo de   &aacute;cidos grasos libres, sensibilizan el h&iacute;gado a esteatosis hep&aacute;tica mediante   factor de necrosis tumoral alfa (FNT-&#945;) y Fas. Tambi&eacute;n hay evidencias en   modelos de ratones hiperlipid&eacute;micos, en los que el colesterol libre es un   factor de riesgo importante en la transici&oacute;n de esteatosis a NASH (36-40).</p>     <p>Finalmente, los &iacute;ndices De Ritis   mayores de 1,0, encontrados en los pacientes y probablemente derivados de la   producci&oacute;n y liberaci&oacute;n mitocondrial de AST, indican que existe progresi&oacute;n de   la fibrosis hep&aacute;tica en los individuos (24). Se ha sugerido que estos cambios   en los niveles de transaminasas preceden al h&iacute;gado graso y se asocian con   tendencia a resistencia a la insulina (4). Si bien la relaci&oacute;n De Ritis mayor a   1,0 podr&iacute;a indicar el desarrollo de cirrosis, la elevaci&oacute;n de los niveles de   las transaminasas en h&iacute;gado graso no siempre es evidencia del grado de afecci&oacute;n   hepatocelular (5). Por tanto, con los resultados bioqu&iacute;micos encontrados, es   importante realizar un estudio amplio del diagn&oacute;stico de NAFLD por   imagenolog&iacute;a, histolog&iacute;a y marcadores bioqu&iacute;micos y moleculares que permitan   elucidar mecanismos moleculares, que subyacen a NAFLD y proveer nuevas bases   para el tratamiento de la inflamaci&oacute;n hep&aacute;tica.</p>     <p><strong>CONCLUSI&Oacute;N</strong></p>     <p>En resumen, los resultados preliminares de este estudio   piloto sugieren que existe una poblaci&oacute;n con alto riesgo de padecer h&iacute;gado   graso a la luz de los factores asociados. Las caracter&iacute;sticas de la poblaci&oacute;n y   la relaci&oacute;n AST/ALT mayor a 1,0, y otras variables bioqu&iacute;micas, alertan sobre   la necesidad de un estudio bioqu&iacute;mico-molecular m&aacute;s completo.</p>     <p><strong>Agradecimientos</strong></p>     <p>A la Facultad de Medicina de la Universidad de Cartagena,   Hospital Universitario del Caribe, Semillero de Investigaci&oacute;n del Grupo   Prometeus, Residentes Especialidad en Cirug&iacute;a Universidad de Cartagena (Dr.   Pedro Vides De la Cruz, Dr. Adolfo Roldan Chica, Dr. Luis Gerardo Villota   Gonz&aacute;lez, Dr. Rub&eacute;n Agresott Marsiglia).</p>     <p><strong>Conflicto de intereses</strong></p>     <p>Los autores declaran no tener ning&uacute;n conflicto de intereses.</p>     ]]></body>
<body><![CDATA[<p><strong>Fuentes de financiaci&oacute;n</strong></p>     <p>Los autores declaran financiaci&oacute;n parcial por parte del plan   de Fortalecimiento de la Maestr&iacute;a en Bioqu&iacute;mica y Financiaci&oacute;n aut&oacute;noma de   parte del grupo reconocido por Colciencias: Prometeus &amp; Biomedicina   aplicada a las Ciencias cl&iacute;nicas.</p>     <p><strong>REFERENCIAS</strong></p>     <!-- ref --><p>1. Marchesini G, Bugianesi E, Forlani G, Cerrelli F, Lenzi   M, Manini R, et al. Nonalcoholic fatty liver, steatohepatitis, and the   metabolic syndrome. Hepatology (Baltimore, Md). 2003;37(4):917-23.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=2629654&pid=S0120-9957201600020000100001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>     <!-- ref --><p>2. 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