<?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>1870-0195</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias farmacéuticas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. cienc. farm]]></abbrev-journal-title>
<issn>1870-0195</issn>
<publisher>
<publisher-name><![CDATA[Asociación Farmacéutica Mexicana A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-01952012000200003</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Tratamientos farmacológicos contra alternativos en el manejo de pacientes con artritis reumatoide]]></article-title>
<article-title xml:lang="en"><![CDATA[Pharmaceutical vs. alternative treatment in the rheumatoid arthritis patients]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Domínguez Hernández]]></surname>
<given-names><![CDATA[Liliana]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hohlatcheff Ávila]]></surname>
<given-names><![CDATA[Ana Laura]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Montiel Hernández]]></surname>
<given-names><![CDATA[José Luis]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Autónoma del Estado de Morelos Facultad de Farmacia Laboratorio de Citocinas y Autoinmunidad]]></institution>
<addr-line><![CDATA[Cuernavaca Morelos]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2012</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2012</year>
</pub-date>
<volume>43</volume>
<numero>2</numero>
<fpage>23</fpage>
<lpage>30</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-01952012000200003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-01952012000200003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-01952012000200003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[La Artritis Reumatoide es una enfermedad autoinmune progresiva de etiología multifactorial caracterizada por inflamación, dolor y erosión articular. Los tratamientos terapéuticos más frecuentes es el empleo de medicamentos alopáticos (AINES, FARMES y biológicos), los cuales permiten un cierto nivel control de los síntomas y evolución de esta enfermedad en los pacientes. Sin embargo, un alto porcentaje de los pacientes emplean en algún momento, tratamientos no convencionales o alternativos (CAM), lo cual puede derivar en respuestas clínicas muy variadas y algunas veces indeseables. En este trabajo revisión se hace una comparación entre los tratamientos farmacológicos y de los tratamientos alternativos en base a las evidencias científicas en el manejo en pacientes con Artritis Reumatoide.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Rheumatoid Arthritis is an autoimmune and progressive disease, of multifactorial etiology and characterized by inflammation, pain and bone erosion in the peripheral joints. The most common therapeutic treatments included the employ of allopathic drugs (AINES, DMARDs and biological), which allow a control of symptoms and development of the disease in patients. However, an elevated number of patients also employ non-conventional or alternative treatments (CAMs), deriving in very different and sometimes undesirable clinical responses. In this review we compare the pharmacologic treatments and alternative treatments according with the scientific evidences of its effect in the RA patients.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[artritis reumatoide]]></kwd>
<kwd lng="es"><![CDATA[tratamiento]]></kwd>
<kwd lng="es"><![CDATA[inflamación]]></kwd>
<kwd lng="es"><![CDATA[fármaco]]></kwd>
<kwd lng="es"><![CDATA[CAMs]]></kwd>
<kwd lng="en"><![CDATA[rheumatoid arthritis]]></kwd>
<kwd lng="en"><![CDATA[treatment]]></kwd>
<kwd lng="en"><![CDATA[inflammation]]></kwd>
<kwd lng="en"><![CDATA[drug]]></kwd>
<kwd lng="en"><![CDATA[CAMs]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  	     <p align="justify"><font face="verdana" size="4">Revisi&oacute;n bibliogr&aacute;fica</font></p>  	    <p>&nbsp;</p>  	    <p align="center"><font face="verdana" size="4"><b>Tratamientos farmacol&oacute;gicos contra alternativos en el manejo de pacientes con artritis reumatoide</b></font></p>  	    <p>&nbsp;</p>  	    <p align="center"><font face="verdana" size="3"><b>Pharmaceutical vs. alternative treatment in the rheumatoid arthritis patients</b></font></p>  	    <p>&nbsp;</p>  	    <p align="center"><font face="verdana" size="2"><b>Liliana Dom&iacute;nguez Hern&aacute;ndez, Ana Laura Hohlatcheff &Aacute;vila, Jos&eacute; Luis Montiel Hern&aacute;ndez</b></font></p>  	    <p>&nbsp;</p>  	     <p align="justify"><font face="verdana" size="2"><i>Universidad Aut&oacute;noma    del Estado de Morelos, Facultad de Farmacia. Laboratorio de Citocinas y Autoinmunidad.</i></font></p>  	    ]]></body>
<body><![CDATA[<p>&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2"><b>Correspondencia:</b></font></p>  	     <p align="justify"><font face="verdana" size="2"><i>Dr. Jos&eacute; Luis Montiel    Hern&aacute;ndez.     <br>   Universidad Aut&oacute;noma del Estado de Morelos    <br>   Facultad de Farmacia    <br>   Laboratorio de Citocinas y Autoinmunidad     <br>   Universidad 1001 Col. Chamilpa C.P. 62209,     <br>   Cuernavaca, Morelos     <br>   Tel. 01 7773297000 ext 3371    <br>   e&#45;mail:</i> <a href="mailto:jlmontiel@uaem.mx">jlmontiel@uaem.mx</a></font></p>     ]]></body>
<body><![CDATA[<p align="justify">&nbsp;</p>     <p align="justify"><font size="2" face="verdana">Fecha de recepci&oacute;n: 23    de agosto de 2011.    <br>   Fecha de recepci&oacute;n de modificaciones: 1 de diciembre de 2011.    <br>   Fecha de aceptaci&oacute;n: 17 de enero de 2012.</font></p>  	    <p>&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>  	    <p align="justify"><font face="verdana" size="2">La Artritis Reumatoide es una enfermedad autoinmune progresiva de etiolog&iacute;a multifactorial caracterizada por inflamaci&oacute;n, dolor y erosi&oacute;n articular. Los tratamientos terap&eacute;uticos m&aacute;s frecuentes es el empleo de medicamentos alop&aacute;ticos (AINES, FARMES y biol&oacute;gicos), los cuales permiten un cierto nivel control de los s&iacute;ntomas y evoluci&oacute;n de esta enfermedad en los pacientes. Sin embargo, un alto porcentaje de los pacientes emplean en alg&uacute;n momento, tratamientos no convencionales o alternativos (CAM), lo cual puede derivar en respuestas cl&iacute;nicas muy variadas y algunas veces indeseables. En este trabajo revisi&oacute;n se hace una comparaci&oacute;n entre los tratamientos farmacol&oacute;gicos y de los tratamientos alternativos en base a las evidencias cient&iacute;ficas en el manejo en pacientes con Artritis Reumatoide.</font></p>  	     <p align="justify"><font face="verdana" size="2"><b>Palabras clave:</b> artritis    reumatoide, tratamiento, inflamaci&oacute;n, f&aacute;rmaco, CAMs.</font></p>  	    <p>&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>  	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">Rheumatoid Arthritis is an autoimmune and progressive disease, of multifactorial etiology and characterized by inflammation, pain and bone erosion in the peripheral joints. The most common therapeutic treatments included the employ of allopathic drugs (AINES, DMARDs and biological), which allow a control of symptoms and development of the disease in patients. However, an elevated number of patients also employ non&#45;conventional or alternative treatments (CAMs), deriving in very different and sometimes undesirable clinical responses. In this review we compare the pharmacologic treatments and alternative treatments according with the scientific evidences of its effect in the RA patients.</font></p>  	     <p align="justify"><font face="verdana" size="2"><b>Key words:</b> rheumatoid    arthritis, treatment, inflammation, drug, CAMs.</font></p>  	    <p>&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2"><b>Introducci&oacute;n</b></font></p>  	    <p align="justify"><font face="verdana" size="2">La Artritis Reumatoide (AR) es una enfermedad autoinmune cr&oacute;nica y progresiva, caracterizada por la inflamaci&oacute;n, dolor y destrucci&oacute;n &oacute;sea en las articulaciones perif&eacute;ricas, situaci&oacute;n que puede desembocar en discapacidad. Se estima que afecta aproximadamente entre el 0.5&#45;1.0% de la poblaci&oacute;n mexicana.<sup>1</sup> Asimismo, es un padecimiento que afecta principalmente a mujeres adultas, por lo que se sugiere la participaci&oacute;n de las hormonas sexuales.<sup>2</sup> Se reconoce que la etiolog&iacute;a de esta enfermedad es multifactorial, donde los factores m&aacute;s importantes son la predisposici&oacute;n gen&eacute;tica, la desregulaci&oacute;n de la respuesta inmune y los factores medioambientales, tales como infecciones bacterianas y virales, la exposici&oacute;n a sustancias qu&iacute;micos y f&iacute;sicas (tabaquismo), etc.<sup>3,4</sup> Debido a la amplia gama de factores que pueden favorecer el desarrollo de esta enfermedad, se han dise&ntilde;ado diferentes alternativas farmacol&oacute;gicas para controlar s&iacute;ntomas de la enfermedad, as&iacute; como su desarrollo (<a href="#t1">Tabla 1</a>). A pesar de la presencia de varias opciones farmacol&oacute;gicas dentro de la medicina alop&aacute;tica, un porcentaje grande de los pacientes tambi&eacute;n hacen uso de m&eacute;todos y reactivos de la Medicina complementaria y alternativa (CAM; por sus siglas en ingl&eacute;s <i>Complementary and Alternative Medicine).</i> Situaci&oacute;n que ha significado un gran aumento en la comercializaci&oacute;n y generaci&oacute;n de nuevas opciones terap&eacute;uticas. Lamentablemente, pocos pacientes informan a los reumat&oacute;logos sobre el empleo de estos tratamientos, lo cual puede llevar en respuestas cl&iacute;nicas muy variadas y algunas veces indeseables.</font></p>  	     <p align="center"><font face="verdana" size="2"><a name="t1"></a></font></p>     <p align="center"><img src="../img/revistas/rmcf/v43n2/a3t1.jpg"></p>     <p align="center"><font face="verdana" size="2">* ver Material suplementario</font></p>     <p align="justify"><font face="verdana" size="2">En esta tabla se muestran los    mecanismos de acci&oacute;n de las diferentes alternativas farmacol&oacute;gicas    com&uacute;nmente utilizados en el tratamiento de AR.</font></p>  	    <p align="justify"><font face="verdana" size="2">En esa situaci&oacute;n, nos interesa en el presente trabajo comparar los dos tipos de medicina, en base a las evidencias cient&iacute;ficas que explican su efecto biol&oacute;gico y beneficio en el uso cl&iacute;nico. Para eso realizamos una b&uacute;squeda bibliogr&aacute;fica en Pubmed (<a href="http://www.ncbi.nlm.nih.gov/pubmed" target="_blank">www.ncbi.nlm.nih.gov/pubmed</a>) de trabajos en idioma ingl&eacute;s, del per&iacute;odo 2000&#45;2010, con las palabras clave: "antirheumatic drugs", "rheumatoid arthritis treatment", "alternative medicine". Es importante considerar que debido a la extensa de literatura especializada en la caracterizaci&oacute;n biol&oacute;gica y cl&iacute;nica de los tratamientos farmacol&oacute;gicos, en la secci&oacute;n de material suplementario se presenta una lista de enlaces a portales electr&oacute;nicos de organizaciones nacionales y mundiales especializadas en el tratamiento de pacientes con AR, as&iacute; como una relaci&oacute;n adicional de revisiones bibliogr&aacute;ficas recientes sobre este tema (2010&#45;11). Asimismo, dado que los fines del presente trabajo fueron comparar la base cient&iacute;fica de ambos tipos de tratamientos y, en ning&uacute;n momento el constituirse en un compendio exhaustivo de los medicamentos antireum&aacute;ticos, preferimos hacer hincapi&eacute; en las evidencias cient&iacute;ficas que pudimos localizar en la medicina complementaria y alternativa.</font></p>  	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2"><b>Tratamiento Farmacol&oacute;gico</b></font></p>  	    <p align="justify"><font face="verdana" size="2">Como su nombre lo dice, los anti&#45;inflamatorios no esteroideos (AINES), disminuyen el dolor y la inflamaci&oacute;n, mediante la inhibici&oacute;n de las ciclo&#45;oxigenasas (COX&#45;1 y 2) y el bloqueo de la secreci&oacute;n de mediadores pro&#45;inflamatorios<sup>6</sup>. Sin embargo, se reconoce que su acci&oacute;n s&oacute;lo bloquea los s&iacute;ntomas pero no induce un efecto significativo sobre el curso de la enfermedad.<sup>5,6</sup></font></p>  	    <p align="justify"><font face="verdana" size="2">Por otra parte, los glucocorticoides son otra alternativa farmacol&oacute;gica muy empleada para controlar los s&iacute;ntomas de pacientes con AR, debido a su potente efecto anti&#45;inflamatorio y analg&eacute;sico.<sup>8</sup> Sin embargo, debido a que se presentan diversos efectos adversos (favorece infecciones, riesgo cardiovascular, neoplasia, etc.), se recomienda su empleo a dosis bajas y por per&iacute;odos cortos.<sup>7</sup></font></p>  	    <p align="justify"><font face="verdana" size="2">La primera alternativa de tratamiento empleada por los reumat&oacute;logos son los f&aacute;rmacos modificadores de la enfermedad (FARMES), los cuales adem&aacute;s de disminuir la inflamaci&oacute;n y proteger de los da&ntilde;os estructurales, tambi&eacute;n pueden llevar a la remisi&oacute;n en el 50&#45;80% de los pacientes, sobre todo en aquellos que iniciaron el tratamiento en una etapa temprana (&lt;1 a&ntilde;o del inicio de los s&iacute;ntomas).<sup>9&#45;16</sup> Varios estudios en sistemas in vitro, en modelos animales y en humanos han mostrado inducir efectos sobre la activaci&oacute;n, proliferaci&oacute;n y viabilidad de c&eacute;lulas inmunol&oacute;gicas.<sup>12</sup> En particular se ha confirmado un efecto inhibidor de la respuesta inmunol&oacute;gica adaptativa para metrotexate y leflunomida, por bloqueo de cascadas de activaci&oacute;n intracelular en linfocitos T, NK y B,<sup>10,1215</sup> favoreciendo un descenso de los t&iacute;tulos de autoanticuerpos y prote&iacute;nas de fase aguda.<sup>15</sup> A pesar de sus ventajas, sus efectos se observan en tiempos largos, por lo que se prefiere esquemas de tratamiento combinado o con r&aacute;pido escalamiento. Por otro lado, existe un porcentaje significativo de los pacientes que muestran resistencia a sus efectos, al tiempo que su uso prolongado conlleva a efectos gastrointestinales.</font></p>  	     <p align="justify"><font face="verdana" size="2">La alternativa farmacol&oacute;gica    m&aacute;s reciente para el control de la AR es el empleo de los agentes biol&oacute;gicos<sup>17</sup>.    Se trata de prote&iacute;nas de origen biotecnol&oacute;gico dise&ntilde;adas    para bloquear de manera selectiva citocinas y prote&iacute;nas asociadas en    la regulaci&oacute;n de la inflamaci&oacute;n (por ejemplo, anticuerpos o receptores    solubles para bloquear citocinas tales como TNF&#45;&#945;, IL&#45;1&#946;,    IL&#45;6, entre otras.<sup>13&#45;15,</sup><sup>17</sup> Esta estrategia ha    mostrado efectos muy buenos en los pacientes con AR, ya que influye tanto en    la respuesta inflamatoria como en la desregulaci&oacute;n autoinmune (ver material    suplementario). En este sentido, el empleo combinado de biol&oacute;gicos con    FARMES ha permitido un efecto positivo en cerca del 80&#45;90% de los pacientes    con AR y en casi el 100% de los pacientes con espondiloartripat&iacute;as. Sin    embargo, aun as&iacute; se ha observado que un porcentaje minoritario de los    pacientes son resistentes a estos medicamentos.<sup>16,17</sup> Ajeno a su efecto    terap&eacute;utico, el factor que limita su empleo de manera generalizada es    su costo tan elevado, lo cual hace prohibitivo su empleo para gran parte de    los pacientes en pa&iacute;ses en v&iacute;as de desarrollo.</font></p>  	    <p align="justify"><font face="verdana" size="2">A pesar de la presencia de diferentes alternativas farmacol&oacute;gicas para el control de los s&iacute;ntomas en pacientes con AR, un porcentaje significativo de los pacientes presenta falta de apego al tratamiento, motivado ya sea porque no se alcanzaron las expectativas en corto tiempo, por el gasto econ&oacute;mico o por una mezcla de estos factores.<sup>16,18</sup> En esas condiciones, la presencia de alternativas no farmacol&oacute;gicas para el tratamiento de la AR parece llenar un vac&iacute;o de la atenci&oacute;n m&eacute;dica.<sup>19</sup></font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Tratamiento no farmacol&oacute;gico</b></font></p>  	    <p align="justify"><font face="verdana" size="2">La medicina complementaria y alternativa es un grupo de sistemas de salud, pr&aacute;cticas, productos m&eacute;dicos y del cuidado de la salud que son ajenos a la medicina alop&aacute;tica o convencional. En a&ntilde;os recientes, su uso se ha incrementado de manera importante tanto en pa&iacute;ses en v&iacute;as de desarrollo como en pa&iacute;ses desarrollados. Estudios epidemiol&oacute;gicos en varios pa&iacute;ses han reportado que entre un 20&#45;60% de los pacientes han empleado, en alg&uacute;n momento, los tratamientos de tipo CAM.<sup>20&#45;23</sup> Nuestro pa&iacute;s no es la excepci&oacute;n, dado que cerca del 70% de los pacientes declararon haber empleado alguno de estos tratamientos y s&oacute;lo el 26% lo informaron al especialista. Lo m&aacute;s notable de esta pr&aacute;ctica es que fue un motivo para suspender su tratamiento farmacol&oacute;gico.<sup>24</sup> Aunque en trabajos recientes se han enumerado las pocas evidencias cient&iacute;ficas del efecto ben&eacute;fico de estos tratamientos en pacientes con AR,<sup>19,25,26</sup> resulta parad&oacute;jico que su empleo no s&oacute;lo no ha disminuido, sino que sigue creciendo. A continuaci&oacute;n se ofrece una descripci&oacute;n de estas pr&aacute;cticas o productos m&eacute;dicos, as&iacute; como las evidencias objetivas en que se basa su efecto ben&eacute;fico en el control de los s&iacute;ntomas de la AR.</font></p>  	    <p align="justify"><font face="verdana" size="2">La acupuntura se basa en la estimulaci&oacute;n de la piel para potenciar la liberaci&oacute;n de neurotransmisores, los cuales, se sugiere, inhiben el dolor. Esta alternativa involucra el uso de t&eacute;cnicas de estimulaci&oacute;n a trav&eacute;s de agujas, estimulaci&oacute;n el&eacute;ctrica y cal&oacute;rica. Sin embargo, no se ha podido identificar evidencias significativas de su efecto ben&eacute;fico en el desarrollo o control de la AR.<sup>28&#45;31</sup> Recientemente, en un estudio piloto, al azar, doble ciego y controlado, se observ&oacute; que el tratamiento con acupuntura por 9 semanas permiti&oacute; que un porcentaje significativo de los pacientes alcanzaran una mejor&iacute;a del 20% (ACR20), al tiempo que su funcionalidad y evaluaci&oacute;n anal&oacute;gica mejoraron. Sin embargo, ninguno de sus par&aacute;metros de laboratorio se modific&oacute;, sugiriendo que la mejor&iacute;a observada pudo haber sido resultado de la percepci&oacute;n del dolor.<sup>32</sup> Por otra parte, algunos estudios realizados en modelos animales sugieren que la electroacupuntura tiene efectos m&aacute;s importantes sobre el desarrollo de la inflamaci&oacute;n, sin embargo, estos resultados no han sido validados en los pacientes.<sup>19</sup></font></p>  	    <p align="justify"><font face="verdana" size="2">Una alternativa de la acupuntura, podr&iacute;a ser la aplicaci&oacute;n articular del veneno de abeja, donde adem&aacute;s de la estimulaci&oacute;n cut&aacute;nea, se implica la acci&oacute;n biol&oacute;gica de los componentes del veneno. Los estudios en modelos animales, sugieren que su efecto depende de la acci&oacute;n para controlar el dolor y formaci&oacute;n de radicales de ox&iacute;geno.<sup>33</sup> En un estudio cl&iacute;nico corto, se observ&oacute; una disminuci&oacute;n en los par&aacute;metros de inflamaci&oacute;n articular,<sup>19</sup> esto fue similar en otros estudios, aunque fueron evaluaciones con pocos pacientes y de dise&ntilde;o poco riguroso.<sup>34</sup> Conviene considerar que su aplicaci&oacute;n indiscriminada puede generar efectos adversos serios en pacientes sensibles (reacci&oacute;n anafil&aacute;ctica).</font></p>  	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">Por su parte, la homeopat&iacute;a es otra CAM ampliamente empleada en procesos cr&oacute;nicos, aunque sus resultados son material de un amplio debate. En estudios controlados y doble ciego, empleando pacientes con AR que continuaron recibiendo su tratamiento farmacol&oacute;gico, se observ&oacute; que los medicamentos homeop&aacute;ticos no modificaron los par&aacute;metros cl&iacute;nicos de los pacientes.<sup>35</sup> En cambio, su asistencia a las consultas homeop&aacute;ticas, ocasion&oacute; una mejora significativa en los &iacute;ndices cl&iacute;nicos, sugiriendo que la atenci&oacute;n personalizada tiene mayor efecto que los medicamentos homeop&aacute;ticos.<sup>36,37</sup></font></p>  	     <p align="justify"><font face="verdana" size="2">Otro de los tratamientos alternativos    es el empleo de suplementos alimenticios como las vitaminas con antioxidantes    y los &aacute;cidos grasos poliinsaturados Omega&#45;3. Es bien conocido que    los &aacute;cidos grasos poliinsaturados Omega&#45;3 tienen un efecto anti&#45;inflamatorio,    gracias a la expresi&oacute;n de las mol&eacute;culas resolvinas y protectinas,<sup>38,39</sup>    las cuales inhiben la activaci&oacute;n de NF&#45;kB y la liberaci&oacute;n    de IL&#45;1&#946; y TNF&#45;&#945;.<sup>40&#45;42</sup> En un estudio cl&iacute;nico    con un n&uacute;mero limitado de pacientes, durante 24 semanas se observ&oacute;    que la mezcla de aceites de pescado y olivo indujo una disminuci&oacute;n significativa    en el dolor, rigidez matutina, aunque no altero los par&aacute;metros de laboratorio.<sup>43</sup></font></p>  	    <p align="justify"><font face="verdana" size="2">Quiz&aacute;s la m&aacute;s importante de las alternativas terap&eacute;uticas no farmacol&oacute;gicas, es el empleo de preparados a partir de plantas (fitoterapia). Esta constituye una pr&aacute;ctica muy com&uacute;n tanto en nuestro pa&iacute;s como en muchos otros pa&iacute;ses, por lo que por s&iacute; sola se ha constituido como una de las &aacute;reas m&aacute;s florecientes. Recientemente, se hizo una revisi&oacute;n bibliogr&aacute;fica detallada de 260 productos CAM ofertados en Jap&oacute;n, encontrando que s&oacute;lo 41 presentaban alguna evidencia experimental.<sup>27</sup> A manera de conclusi&oacute;n, los autores se&ntilde;alan la posibilidad de incorporar algunos de estos suplementos al tratamiento farmacol&oacute;gico, sobre todo para el control del dolor; aunque se enfatiza que varias de las evidencias declaradas carecen de par&aacute;metros objetivos. Por otro lado, debido al pobre conocimiento de su empleo prolongado, el Colegio Americano de Reumatolog&iacute;a recomienda hacer un empleo cuidadoso durante las primeras etapas del desarrollo de la AR, para limitar su efecto adverso a nivel de la erosi&oacute;n articular.<sup>16</sup></font></p>  	    <p align="justify"><font face="verdana" size="2">En la <a href="#t2">Tabla 2</a> se presentan algunas de las alternativas herbolarias donde pudimos localizar evidencias objetivas de su efecto <i>in vitro</i> o modelos animales y en estudios con pacientes. Obs&eacute;rvese que la mayor parte de estos extractos basan su efecto en la disminuci&oacute;n de mediadores de inflamaci&oacute;n,<sup>18,26,43</sup> sin embargo pocos preparados se han evaluado en estudios cl&iacute;nicos controlados, con un n&uacute;mero suficiente de pacientes y con par&aacute;metros cl&iacute;nicamente aceptados.<sup>26</sup> Asimismo, una importante desventaja para la realizaci&oacute;n de estudios farmacol&oacute;gicos en este &aacute;rea, es la deficiente caracterizaci&oacute;n y purificaci&oacute;n de los metabolitos potencialmente activos.</font></p>  	     <p align="center"><font face="verdana" size="2"><a name="t2"></a></font></p>     <p align="center"><font size="2" face="verdana"><img src="../img/revistas/rmcf/v43n2/a3t2.jpg"></font></p>  	     <p align="justify"><font face="verdana" size="2">En diferentes estudios en modelos    animales, la administraci&oacute;n de extractos de <i>Camellia sinensis</i>    (t&eacute; verde) sugiere un efecto anti&#45;inflamatorio, del cual se responsabiliza    al alto contenido de polifenoles, principalmente epigalocatecina&#45;3&#45;galato.    En modelos animales, estos metabolitos ocasionaron disminuci&oacute;n de citocinas    tales como IL&#45;1&#946;, IFN&#45;&#947;, TNF&#45;&#945;, as&iacute; como la    disminuci&oacute;n de &oacute;xido n&iacute;trico, prostaglandina E2 y de las    metaloproteasas MMP&#45;1 y MMP&#45;3.<sup>18,44&#45;46</sup> Basados en un    mecanismo biol&oacute;gico semejante, se ha propuesto que especies como <i>Celastrus    aculeatus</i> y <i>Uncaria tormentosa</i> (U&ntilde;a de gato) poseen tambi&eacute;n    efectos antioxidantes y anti&#45;inflamatorios.<sup>18</sup> Interesantemente,    en un estudio cl&iacute;nico controlado, empleando el extracto de Uncaria tormentosa    se observ&oacute; una disminuci&oacute;n significativa de la inflamaci&oacute;n    articular y el dolor.<sup>47</sup></font></p>  	    <p align="justify"><font face="verdana" size="2">Por su parte, el extracto de <i>Lepidium meyenii,</i> adem&aacute;s de mostrar efectos anti&#45;inflamatorios en modelos animales y en c&eacute;lulas en cultivo, parece promover la restauraci&oacute;n de la articulaci&oacute;n,<sup>18</sup> por un mecanismo que sugiere la estimulaci&oacute;n de IGF&#45;1 por los condrocitos<sup>48</sup>. De manera diferente, se ha sugerido que <i>Tripterygium wilfordii Hook F</i> posee un componente activo (triptolido) que puede inducir efectos anti&#45;inflamatorios al alterar la expresi&oacute;n de MMP&#45;1, MMP&#45;3, IL&#45;1&#946;, IL&#45;17 y TNF&#45;&#945; en fibroblastos, macr&oacute;fagos y condrocitos de rat&oacute;n.<sup>49</sup> De manera interesante, en un estudio cl&iacute;nico controlado, el extracto de esta especie mostr&oacute; un efecto ben&eacute;fico significativo a concentraciones elevadas (360 mg/d&iacute;a) tanto en el n&uacute;mero de articulaciones dolorosas como en &iacute;ndice de recuperaci&oacute;n (ACR50%).<sup>50</sup></font></p>  	    <p align="justify"><font face="verdana" size="2">Por otro lado, estudios en modelos animales con extractos de <i>Perna canaliculus</i> han mostrado efectos anti&#45;inflamatorios comparables a los AINES.<sup>51</sup> Asimismo, empleando un modelo de artritis murina inducido por ant&iacute;geno, este extracto inhibi&oacute; la bios&iacute;ntesis de prostaglandinas (PGE&#45;2) y COX&#45;2.<sup>52</sup> Por otra parte, y mostrando mecanismos similares, se han evaluado extractos de <i>Curcuma longa,</i><sup>53</sup> <i>Zingiber officinale</i><sup>54</sup> y <i>Semecarpus anacardium</i><sup>55</sup> en modelos murinos.</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>De las evidencias de seguridad y eficacia</b></font></p>  	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">Varios otros trabajos de revisi&oacute;n bibliogr&aacute;fica, adem&aacute;s del presente, han evidenciado la pocas evidencias objetivas y significativas de los productos CAM empleados en contra de la AR.<sup>26</sup> Sin embargo se han reportado varios estudios rigurosos en ensayos con animales donde se ha mostrado un efecto positivo de los CAMs, lo cual sugiere que no es posible descartar indiscriminadamente estas pr&aacute;cticas y productos. Conviene considerar que cuando se han realizado evaluaciones en pacientes con AR, los beneficios son m&aacute;s bien modestos o se realizan dise&ntilde;os cl&iacute;nicos incompletos.<sup>25</sup> Finalmente, la gran mayor&iacute;a de los CAMs carece de una descripci&oacute;n fundamentada del mecanismo biol&oacute;gico por el que realizan su efecto (<a href="#t2">Tabla 2</a>).</font></p>  	    <p align="justify"><font face="verdana" size="2">En esta tabla se muestran los efectos potenciales de las alternativas herbolarias m&aacute;s comunes en el tratamiento de AR. MMPs metaloproteasas, COX&#45;2; Cicloxigenasa 2, LPS; Lipopolisac&aacute;rido, IL; Interleucina, TNF&#45;&#945;; Factor de necrosis tumoral &#945;, NF&#45;&#954;B; Factor nuclear &#954; Beta.</font></p>  	    <p align="justify"><font face="verdana" size="2">Por otro lado, el gran empleo de las terapias alternativas por parte de los pacientes con AR parece responder a diferentes factores: primeramente, constituye una alternativa muy accesible para el paciente. Segundo, toda vez que su promoci&oacute;n tiene un componente de car&aacute;cter personal, su utilidad conlleva un importante elemento psicol&oacute;gico. Tercero, dado que una de las principales razones por la cual los pacientes con AR recurren al uso de CAM es la analgesia, su empleo no es regular y obedece a su percepci&oacute;n del dolor en un momento dado, por todo esto no es posible generar un esquema de tratamiento organizado. Finalmente, en general, los pacientes no informan al especialista del empleo de otras alternativas, contaminando su esquema de tratamiento y, por ende, su seguimiento.</font></p>  	    <p align="justify"><font face="verdana" size="2">Adem&aacute;s de insuficiente evidencia cient&iacute;fica para establecer esquemas de tratamiento con productos de tipo CAM para garantizar su seguridad y eficacia. En el caso particular del empleo de material bot&aacute;nico, es necesario establecer con seguridad el g&eacute;nero y especie de las plantas empleadas, para intentar garantizar los efectos terap&eacute;uticos; por lo que es indispensable la identificaci&oacute;n taxon&oacute;mica. En t&eacute;rminos oficiales, los medicamentos de cualquier clase, incluyendo los herbolarios y los vitam&iacute;nicos, deben haber demostrado seguridad y eficacia, en ensayos controlados y certificados por organismos reguladores (COFEPRIS).<sup>58</sup> Sin embargo, la gran mayor&iacute;a de las CAMs s&oacute;lo cuentan con el registro como suplementos alimenticios, vitaminas o cosm&eacute;ticos, lo cual no requiere este tipo de evaluaci&oacute;n oficial.</font></p>  	    <p align="justify"><font face="verdana" size="2">Por otro lado, la poblaci&oacute;n considera que los productos herbolarios, por ser naturales, son inocuos; sin embargo, esto no necesariamente es verdadero. Existen numerosos ejemplos en la literatura m&eacute;dica de los efectos adversos debido a la ingesti&oacute;n de productos que contienen extractos de plantas, as&iacute; como reportes de los programas de farmacovigilancia que advierten de efectos graves debido a su empleo.<sup>57,58</sup> Aunque no es obligatoria la presentaci&oacute;n de estudios cl&iacute;nicos que avalen la eficacia de los remedios herbolarios, deben presentarse evidencias de la seguridad de las plantas o derivados contenidos en el remedio. Si se careciera de los datos que respalden la seguridad del producto, deber&aacute; generarse la investigaci&oacute;n cl&iacute;nica que la demuestre.</font></p>  	    <p align="justify"><font face="verdana" size="2">Debido en gran manera a un diagn&oacute;stico tard&iacute;o, insuficiente atenci&oacute;n m&eacute;dica especializada y la respuesta variable a los tratamientos farmacol&oacute;gicos convencionales, la variedad de las alternativas terap&eacute;uticas disponibles en el mercado se ha incrementado de manera descontrolada. En ese sentido, tanto por su diversidad como su importante presencia en los medios de comunicaci&oacute;n ha ocasionado que los tratamientos alternativos para los pacientes con AR, en lugar de servir como complemento en la atenci&oacute;n al paciente, en algunos casos empiecen a sustituir al tratamiento farmacol&oacute;gico, con las consiguientes repercusiones econ&oacute;micas y de salud de los pacientes con AR.</font></p>  	    <p>&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2"><b>Conclusiones</b></font></p>  	    <p align="justify"><font face="verdana" size="2">En estas circunstancias, podr&iacute;amos concluir que los pacientes con AR se encuentran en una situaci&oacute;n complicada: por un lado, es poco frecuente un diagn&oacute;stico temprano de los pacientes, lo cual limita la eficacia de los tratamientos farmacol&oacute;gicos; adem&aacute;s que sus efectos pueden ser tard&iacute;os y sus costos elevados. Por el otro lado, el paciente es sujeto de un "bombardeo" publicitario para emplear tratamientos alternativos, que en t&eacute;rminos generales son m&aacute;s econ&oacute;micos. Sin embargo, a pesar de presentar efectos ben&eacute;ficos moderados, los tratamientos alternativos basan su fortaleza m&aacute;s en aspectos subjetivos del paciente (percepci&oacute;n del dolor, etc.), que en evidencias cient&iacute;ficas derivadas de estudios precl&iacute;nicos y cl&iacute;nicos rigurosos.</font></p>  	    <p>&nbsp;</p>  	    ]]></body>
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