<?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>0121-0793</journal-id>
<journal-title><![CDATA[Iatreia]]></journal-title>
<abbrev-journal-title><![CDATA[Iatreia]]></abbrev-journal-title>
<issn>0121-0793</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Antioquia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0121-07932010000100005</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Relación entre la dieta y el desarrollo de la hiperplasia prostática benigna]]></article-title>
<article-title xml:lang="en"><![CDATA[Relationship between diet and benign prostatic hyperplasia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Balparda Arias]]></surname>
<given-names><![CDATA[Jon Kepa]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Pontificia Bolivariana SIFAM ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2010</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2010</year>
</pub-date>
<volume>23</volume>
<numero>1</numero>
<fpage>43</fpage>
<lpage>48</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0121-07932010000100005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0121-07932010000100005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0121-07932010000100005&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[La hiperplasia prostática benigna es muy común en la población general, tanto desde el punto de vista histológico como del clínico. El papel en ella de diversos factores se ha definido por medio de estudios epidemiológicos. Entre ellos está el consumo regular de algunos alimentos que podrían actuar como un factor protector o de riesgo para el posterior desarrollo de la enfermedad. Entre los compuestos demostrados como benéficos para la salud prostática están los licopenos, los fitoestrógenos y las verduras. Por otro lado, entre los que podrían aumentar el riesgo de sufrir la hiperplasia prostática benigna se incluyen las dietas hipercalóricas y con alto contenido graso. En este artículo se revisan los principales estudios al respecto, con miras a que el médico tenga un mejor conocimiento de los patrones dietéticos que pueden incidir en la frecuencia y síntomas de esta enfermedad.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Benign prostatic hyperplasia is very common in the general population, both from the histological and the clinical points of view. The role of different factors in its development has been defined by means of epidemiological studies. One such factor is the composition of the diet, as the regular consumption of certain foods may either protect against benign prostatic hyperplasia or increase the risk of its development. Among foods which may play a protective role are lycopene, phytoestrogens and vegetables. On the other hand, the risk of developing the disease may be increased by a diet rich in fat and calories. In this article the main clinical trials concerning this relationship are reviewed, as a way of informing physicians on the dietetic patterns that may influence the frequency or the symptoms of this disease]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Dieta]]></kwd>
<kwd lng="es"><![CDATA[Hiperplasia prostática]]></kwd>
<kwd lng="en"><![CDATA[Diet]]></kwd>
<kwd lng="en"><![CDATA[Prostatic hyperplasia]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align=right><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>ART&Iacute;CULO DE REVISTA</b></font></p>     <p>&nbsp;</p>     <p align=center><font size="4" face="Verdana, Arial, Helvetica, sans-serif"><b>Relaci&oacute;n entre la dieta y el desarrollo de la hiperplasia prost&aacute;tica benigna</b></font></p>     <p>&nbsp;</p>     <p align=center><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>Relationship between diet and benign prostatic hyperplasia</b></font></p>     <p>&nbsp;</p>     <p>&nbsp;</p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Jon Kepa Balparda Arias<sup>1</sup></b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><sup>1</sup>M&eacute;dico Interno, Investigador Avanzado Semillero SIFAM; Universidad Pontificia Bolivariana. Diplomado en Nutrici&oacute;n Infantil; Universidad CES. Medell&iacute;n, Colombia. Correspondencia: Jon Kepa Balparda Arias <a href="mailto:jonbalparda@gmail.com">  jonbalparda@gmail.com </a></font></p>     <p>&nbsp;</p>     ]]></body>
<body><![CDATA[<p>&nbsp;</p> <hr noshade size="1">     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>RESUMEN</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La hiperplasia prost&aacute;tica benigna es muy com&uacute;n en la poblaci&oacute;n general, tanto desde el punto de vista histol&oacute;gico como del cl&iacute;nico. El papel en ella de diversos factores se ha definido por medio de estudios epidemiol&oacute;gicos. Entre ellos est&aacute; el consumo regular de algunos alimentos que podr&iacute;an actuar como un factor protector o de riesgo para el posterior desarrollo de la enfermedad. Entre los compuestos demostrados como ben&eacute;ficos para la salud prost&aacute;tica est&aacute;n los licopenos, los fitoestr&oacute;genos y las verduras. Por otro lado, entre los que podr&iacute;an aumentar el riesgo de sufrir la hiperplasia prost&aacute;tica benigna se incluyen las dietas hipercal&oacute;ricas y con alto contenido graso. En este art&iacute;culo se revisan los principales estudios al respecto, con miras a que el m&eacute;dico tenga un mejor conocimiento de los patrones diet&eacute;ticos que pueden incidir en la frecuencia y s&iacute;ntomas de esta enfermedad.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Palabras clave</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><i>Dieta, Hiperplasia prost&aacute;tica</i></font></p> <hr noshade size="1">     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>SUMMARY</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Benign prostatic hyperplasia is very common in the general population, both from the histological and the clinical points of view. The role of different factors in its development has been defined by means of epidemiological studies. One such factor is the composition of the diet, as the regular consumption of certain foods may either protect against benign prostatic hyperplasia or increase the risk of its development. Among foods which may play a protective role are lycopene, phytoestrogens and vegetables. On the other hand, the risk of developing the disease may be increased by a diet rich in fat and calories. In this article the main clinical trials concerning this relationship are reviewed, as a way of informing physicians on the dietetic patterns that may influence the frequency or the symptoms of this disease</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Key words</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><i>Diet , Prostatic hyperplasia</i></font></p> <hr noshade size="1">     <p>&nbsp;</p>     ]]></body>
<body><![CDATA[<p>&nbsp;</p>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>INTRODUCCI&Oacute;N</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"> La hiperplasia prost&aacute;tica benigna (HPB), definida como   un crecimiento excesivo no maligno del tejido   prost&aacute;tico alrededor de la uretra,<sup>1</sup> es una entidad   urol&oacute;gica com&uacute;n<sup>2</sup> y tiene el potencial de llevar a una   verdadera disminuci&oacute;n en la calidad de vida de los   pacientes si no se hace a tiempo un tratamiento   efectivo.<sup>3&#8211;5</sup> La manifestaciones cl&iacute;nicas de la   enfermedad, agrupadas en lo que se denomina   <i>sintomatolog&iacute;a urinaria</i> baja (SUB), incluyen desde pujo   y vacilaci&oacute;n, hasta nicturia, disuria y urgencia   urinaria.<sup>5,6</sup> El t&eacute;rmino prostatismo, utilizado   anteriormente, se encuentra en la actualidad revaluado   y no se recomienda usarlo en la pr&aacute;ctica cl&iacute;nica   moderna por ser confuso.</font></p>       <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Por ser la HPB una enfermedad tan frecuente en la   poblaci&oacute;n general,<sup>1</sup> es importante que el m&eacute;dico de   atenci&oacute;n primaria tenga conceptos claros con respecto   a la historia cl&iacute;nica de los pacientes y de los distintos   elementos del estilo de vida que pueden modular su   aparici&oacute;n.<sup>7</sup> En este art&iacute;culo se revisa la evidencia que   sustenta el rol de ciertos alimentos como potenciadores   o retardantes de la aparici&oacute;n de HPB cl&iacute;nica.</font></p>      <p>&nbsp;</p>       <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>LA DIETA COMO FACTOR DE RIESGO</b></font></p>       <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Desde hace ya varios a&ntilde;os<sup>8</sup> se ha venido proponiendo   que distintos alimentos consumidos de manera regular   pueden incrementar o disminuir la incidencia de HPB   cl&iacute;nica y la necesidad de cirug&iacute;a para su tratamiento<sup>8,9</sup>   y, adem&aacute;s, explicar las discrepancias internacionales   en cuanto a la presencia de enfermedad sintom&aacute;tica.<sup>8</sup>   Es este un asunto de gran inter&eacute;s tanto para el ur&oacute;logo   como para el m&eacute;dico general, por cuanto la dieta es   un componente del estilo de vida relativamente f&aacute;cil   de modificar, con el potencial de influir muy   positivamente en la incidencia y el pron&oacute;stico de la   HPB.<sup>9</sup></font></p>       <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Licopenos</b></font></p>       <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Quiz&aacute; entre los compuestos de la dieta m&aacute;s estudiados   en relaci&oacute;n con la HPB est&aacute;n los licopenos, carotenos   que se encuentran en altas concentraciones en todas   las variedades de tomates, a los que se les ha atribuido   un efecto ben&eacute;fico en cuanto a la incidencia y el   pron&oacute;stico de la HPB y el carcinoma prost&aacute;tico.<sup>10, 20</sup> Las teor&iacute;as al respecto se centran principalmente en las caracter&iacute;sticas antioxidantes de estos compuestos, que   contribuir&iacute;an a disminuir el da&ntilde;o oxidativo del ADN   de las c&eacute;lulas prost&aacute;ticas y los linfocitos en la zona.<sup>11</sup> Al   respecto, un estudio publicado en 2003<sup>10</sup> demostr&oacute; que   la administraci&oacute;n diaria de 30 mg de licopenos ejerc&iacute;a   un modesto efecto ben&eacute;fico sobre la tasa de apoptosis   en individuos con HPB y carcinoma prost&aacute;tico, aunque   los resultados del ensayo no fueron categ&oacute;ricos por lo   limitado de la muestra. Un ensayo cl&iacute;nico aleatorizado   de Schwarz y colaboradores<sup>15</sup> demostr&oacute; que la   administraci&oacute;n diaria de 15 mg de licopenos inhib&iacute;a la   progresi&oacute;n de la enfermedad en un grupo de pacientes   con HPB, mientras que esta continu&oacute; su curso natural   en el grupo que recibi&oacute; placebo (p &lt; 0,05). El mismo   estudio<sup>15</sup> encontr&oacute; igualmente una disminuci&oacute;n de   11,3&#37; en el nivel de ant&iacute;geno prost&aacute;tico espec&iacute;fico en   los pacientes del grupo de intervenci&oacute;n y de 0,58&#37; en   el grupo control (p &lt; 0,05). Por &uacute;ltimo, es pertinente   mencionar un estudio in vitro llevado a cabo por   Oberm&uuml;ller y colaboradores,<sup>13</sup> en el cual se demostr&oacute;   que la proliferaci&oacute;n de c&eacute;lulas prost&aacute;ticas humanas era   inhibida por la administraci&oacute;n de licopenos, en forma   dependiente de la dosis; la m&aacute;xima inhibici&oacute;n (80&#37;) se   alcanzaba con una concentraci&oacute;n de 2 &mu;mol&#47;L de licopenos.</font></p>       <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Con base en los resultados anteriores, ser&iacute;a razonable   afirmar que una dieta rica en tomate o en su salsa   podr&iacute;a resultar protectora contra el desarrollo de HPB   sintom&aacute;tica, especialmente cuando se la ingiere a dosis   por encima de 15 mg de licopenos por d&iacute;a.</font></p>       ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Fitoestr&oacute;genos</b></font></p>       <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Los fitoestr&oacute;genos, que se encuentran en concentraciones   altas en todas las variedades de soya, son un   grupo de compuestos de origen natural, cuya estructura   se asemeja a la del 17&beta;&#8211;estradiol humano, por lo   que pueden llegar a producir, hasta cierto punto, efectos   an&aacute;logos a los de esta hormona cuando se consumen   regularmente en dosis suficientes. Mucho se ha   discutido acerca de sus posibles efectos ben&eacute;ficos sobre   distintas enfermedades, como las cardiovasculares   y el c&aacute;ncer de mama; la gran mayor&iacute;a de los estudios   han hallado un efecto protector de los fitoestr&oacute;genos,   pero algunos autores no han podido confirmar dicho   hallazgo.<sup>21,22</sup></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En cuanto a la salud prost&aacute;tica, se ha propuesto que   estas sustancias podr&iacute;an tener un efecto ben&eacute;fico<sup>8</sup> al reducir la tasa de crecimiento celular en dicho &oacute;rgano, lo cual repercutir&iacute;a en una disminuci&oacute;n de la incidencia y la gravedad sintom&aacute;tica de la HPB.<sup>23</sup></font></p>       <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"> Al respecto, un estudio inicial liderado por Hong<sup>23</sup>   demostr&oacute; que la concentraci&oacute;n prost&aacute;tica total de un   fitoestr&oacute;geno denominado geniste&iacute;na se encontraba   disminuida en los pacientes con HPB (65,43 &plusmn; 17,05   ng&#47;mL), comparados con los individuos de control   considerados sanos por criterios microsc&oacute;picos   (86,96 &plusmn; 37,75 ng&#47;mL; p &#61; 0,032). Un estudio similar,   de Br&ouml;ssner y colaboradores,<sup>24</sup> hall&oacute; que en 94 muestras   de tejido prost&aacute;tico el nivel de geniste&iacute;na era   inversamente proporcional al tama&ntilde;o total de la   gl&aacute;ndula (p &#61; 0,023). Este mismo grupo<sup>24</sup> inform&oacute; el   hallazgo de un nivel m&aacute;s bajo del mencionado   compuesto en los pacientes con adenocarcinoma   prost&aacute;tico comparados con los que ten&iacute;an HPB, lo que   sugerir&iacute;a un efecto protector de la geniste&iacute;na contra la   malignizaci&oacute;n de las c&eacute;lulas de la zona, aunque la   relaci&oacute;n no lleg&oacute; a ser estad&iacute;sticamente significativa   (p &#61; 0,072).</font></p>       <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Por &uacute;ltimo, cabe mencionar un estudio llevado a cabo   en 2.000 hombres chinos,<sup>25</sup> en quienes se evalu&oacute; la   relaci&oacute;n entre la presencia y gravedad de la SUB y el   consumo de isoflavona en la dieta como productos de   soya. En esta cohorte se encontr&oacute; una fuerte relaci&oacute;n   inversa entre el consumo de 5,1&#8211;9,5 mg diarios de   geniste&iacute;na y la presencia de SUB grave, es decir, que   esta sustancia actu&oacute; como factor protector.</font></p>       <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Vegetales</b></font></p>       <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Este t&eacute;rmino se utiliza com&uacute;nmente para referirse a   las partes comestibles de las distintas plantas, que son   un componente fundamental de la llamada dieta   oriental, a diferencia de la dieta occidental en la que   su consumo es mucho menor. Diversos estudios   observacionales han encontrado que el consumo   regular de vegetales podr&iacute;a relacionarse con una   disminuci&oacute;n en el riesgo de sufrir enfermedades como   infarto agudo de miocardio,<sup>26</sup> diabetes mellitus no   insulino&#8211;dependiente<sup>27</sup> y carcinoma broncog&eacute;nico.<sup>28</sup></font></p>       <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En lo concerniente a la salud prost&aacute;tica, un estudio   reciente que incluy&oacute; 868 pacientes australianos<sup>29</sup>   encontr&oacute; que el consumo regular de vegetales era un   factor protector leve contra la HPB cuyo tratamiento   requerir&iacute;a intervenci&oacute;n quir&uacute;rgica (OR: 0,78; IC95&#37;: 0,63&#8211;0,98). Por otra parte, en una cohorte grande depacientes italianos (1.369 casos y 1.451 controles)<sup>30</sup> se inform&oacute; un efecto protector para HPB en los que consum&iacute;an cebolla regularmente (OR: 0,41; IC95&#37;: 0,24&#8211;0,72) y ajo (OR: 0,72; IC95&#37;: 0,57&#8211;0,91). Datos similares en cuanto al consumo regular de vegetales en general se han obtenido en una cohorte italiana31 y dos estadounidenses.<sup>32,33</sup></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Con base en lo anterior, podr&iacute;a asumirse que una dieta rica en vegetales, como la oriental, ser&iacute;a protectora contra el desarrollo de HPB sintom&aacute;tica y contra la necesidad de cirug&iacute;a para el tratamiento de los s&iacute;ntomas. Sin embargo, es dif&iacute;cil discernir hasta qu&eacute; punto este efecto se deba en realidad al consumo de verduras, o si este &uacute;ltimo factor es m&aacute;s bien un marcador de un estilo de vida m&aacute;s saludable que incluye ejercicio y bajo consumo de grasas saturadas.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Calor&iacute;as y grasa</b></font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">El consumo regular de una dieta rica en calor&iacute;as y grasa se ha relacionado con un riesgo aumentado de padecer HPB sintom&aacute;tica,<sup>2,34,35</sup> incluso en grupos &eacute;tnicos que com&uacute;nmente tienen una incidencia baja de la misma, como los orientales.<sup>34</sup> A&uacute;n se desconocen los mecanismos por los cuales estos elementos pueden modular la aparici&oacute;n de enfermedad prost&aacute;tica y la literatura al respecto es escasa. En investigaciones preliminares se ha demostrado que los &aacute;cidos grasos insaturados act&uacute;an como inhibidores de la 5&alpha;&#8211; reductasa, hormona fundamental para el crecimiento prost&aacute;tico; por ello se ha propuesto que el consumo alto de dichos &aacute;cidos podr&iacute;a ser un factor protector contra el desarrollo de HPB al retrasar el aumento de tama&ntilde;o de la gl&aacute;ndula.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Quiz&aacute; uno de los estudios m&aacute;s grandes que han evaluado este asunto ha sido el de Suzuki y colaboradores,<sup>36</sup> quienes siguieron a 33.344 hombres adultos entre 1986 y 1994. En dicha cohorte se encontr&oacute; que consumir un promedio de 2.741 kilocalor&iacute;as por d&iacute;a representaba un factor de riesgo para el desarrollo de HPB sintom&aacute;tica que requerir&iacute;a cirug&iacute;a en comparaci&oacute;n con quienes ten&iacute;an un consumo promedio de 1.204 kilocalor&iacute;as por d&iacute;a (OR: 1,25; IC95&#37;: 1,11&#8211;1,40). En el mismo estudio,<sup>36</sup> cuando se compararon los individuos cuyo consumo promedio diario de grasa era de 88,3 gramos con quienes solo consum&iacute;an un promedio de 53,6 gramos, se encontr&oacute; una leve tendencia al riesgo de HPB sintom&aacute;tica en los pacientes con m&aacute;s alto consumo de grasa, aunque la relaci&oacute;n no alcanz&oacute; a ser estad&iacute;sticamente significativa (OR 1,11 IC95&#37; 0,99&#8211;1,25). Datos similares informaron Kristal y colaboradores,<sup>33</sup> aunque en dicha cohorte s&iacute; se encontr&oacute; una relaci&oacute;n estad&iacute;sticamente significativa entre el consumo alto de grasa y la HPB cl&iacute;nica (p &lt; 0,05).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">A lo anterior se agrega que Bravi y colaboradores,<sup>31</sup> al evaluar a 2.820 individuos, encontraron que un consumo alto de &aacute;cidos grados poliinsaturados (con m&aacute;s baja densidad cal&oacute;rica) brindaba protecci&oacute;n contra la HPB sintom&aacute;tica (OR: 0,72; IC95&#37;: 0,55&#8211;0,93). Se observ&oacute; que los dos compuestos con mayor rol protector eran los &aacute;cidos linoleico y linol&eacute;nico.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Pese a los hallazgos anteriores, es necesario tener en cuenta la dificultad de evaluar la relaci&oacute;n entre el riesgo de HPB y el alto consumo de calor&iacute;as y grasa, debido a que dichos patrones diet&eacute;ticos tambi&eacute;n est&aacute;n asociados a estilos de vida poco saludables, como la escasa actividad f&iacute;sica y el bajo consumo de vegetales.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Otros alimentos</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Otros alimentos, como las prote&iacute;nas y la leche, han sido igualmente considerados posibles factores de riesgo para el desarrollo de HPB cl&iacute;nica;<sup>37,38</sup> sin embargo, la literatura cient&iacute;fica al respecto es escasa.<sup>9</sup></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En cuanto a las prote&iacute;nas en la dieta, Suzuki y colaboradores<sup>36</sup> encontraron que consumir m&aacute;s de 91,6 gramos por d&iacute;a se asociaba con una predisposici&oacute;n leve para el desarrollo de HPB sintom&aacute;tica, en comparaci&oacute;n con un consumo promedio de 72,6 gramos al d&iacute;a (OR: 1,15; IC95&#37;: 1,02&#8211;1,30). Este efecto fue m&aacute;s pronunciado cuando el consumo diario de prote&iacute;nas era de 113 gramos (OR: 1,26; IC95&#37;: 1,12&#8211;1,42). Sin embargo, en un estudio de observaci&oacute;n durante nueve a&ntilde;os en 4.770 pacientes se obtuvieron resultados contrarios, a saber: con un consumo alto de prote&iacute;nas disminu&iacute;a hasta en un 15&#37; el riesgo de padecer HPB diagnosticada cl&iacute;nicamente (p &lt; 0,05).<sup>33</sup> Evidentemente se necesitan m&aacute;s estudios a largo plazo para definir el verdadero comportamiento de la enfermedad prost&aacute;tica con respecto al consumo de prote&iacute;nas en la dieta.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Por otro lado, un estudio hawaiano de cohorte<sup>39</sup> con 6.581 individuos hall&oacute; una relaci&oacute;n positiva entre el consumo regular de carne roja (m&aacute;s de 180 gramos por semana) y la presencia de HPB que requerir&iacute;a tratamiento quir&uacute;rgico (OR 1,3; p &#61; 0,047). Los datos de esta cohorte fueron congruentes con los de otros dos estudios.<sup>8,33</sup> Diversos estudios han encontrado un cierto papel protector del consumo regular de alcohol contra el desarrollo de HPB cl&iacute;nica; Crispo y colaboradores<sup>40</sup> encontraron que este efecto depende de la dosis: es m&aacute;s fuerte entre los individuos que consumen m&aacute;s de siete tragos de bebidas alcoh&oacute;licas al d&iacute;a. Diversos autores han informado hallazgos similares, aunque sus resultados tienden a ser dif&iacute;ciles de comparar debido a las discrepancias en la definici&oacute;n de 'consumo elevado de alcohol';.<sup>2,41,42</sup> Se ha propuesto que esta relaci&oacute;n inversa entre el consumo de alcohol y el desarrollo de HPB podr&iacute;a deberse al nivel m&aacute;s bajo de andr&oacute;genos de los pacientes con una ingesta considerable de alcohol.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Finalmente, se ha propuesto que el consumo elevado de otros alimentos podr&iacute;a incrementar el riesgo de desarrollar enfermedad prost&aacute;tica; entre ellos se incluyen: mantequilla,<sup>43</sup> margarina,<sup>43</sup> leche,<sup>8,44</sup> huevos<sup>31</sup> y pan.<sup>3</sup>1</font></p>     <p>&nbsp;</p>     ]]></body>
<body><![CDATA[<p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>CONCLUSIONES</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Las enfermedades prost&aacute;ticas, especialmente la HPB, son muy frecuentes en la pr&aacute;ctica cl&iacute;nica diaria, especialmente en poblaciones occidentales.<sup>45,46</sup> Son de gran inter&eacute;s para los investigadores y los cl&iacute;nicos por su estrecha relaci&oacute;n con distintos factores de riesgo que podr&iacute;an llegar a modular la expresi&oacute;n de la enfermedad si se influyera en ellos de manera adecuada y costo&#8211;efectiva.<sup>47,48</sup> Diversos estudios sugieren que hay una relaci&oacute;n entre la enfermedad prost&aacute;tica cl&iacute;nica y la dieta.<sup>9,50</sup> Esta informaci&oacute;n puede ser el punto de partida para estudiar maneras de disminuir la incidencia de la enfermedad y de entender su fisiopatolog&iacute;a.</font></p>     <p>&nbsp;</p>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>REFERENCIAS BIBLIOGR&Aacute;FICAS</b></font></p>     <!-- ref --><p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">1. 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