<?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>0120-5633</journal-id>
<journal-title><![CDATA[Revista Colombiana de Cardiología]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Colomb. Cardiol.]]></abbrev-journal-title>
<issn>0120-5633</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Colombiana de Cardiologia. Oficina de Publicaciones]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-56332013000100007</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Canakinumab: un anticuerpo monoclonal prometedor en el tratamiento de enfermedades cardiovasculares]]></article-title>
<article-title xml:lang="en"><![CDATA[Canakinumab: a promising monoclonal antibody in the treatment of cardiovascular diseases]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Manzur]]></surname>
<given-names><![CDATA[Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moneriz]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad de Cartagena  ]]></institution>
<addr-line><![CDATA[Cartagena ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2013</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2013</year>
</pub-date>
<volume>20</volume>
<numero>1</numero>
<fpage>33</fpage>
<lpage>39</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-56332013000100007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-56332013000100007&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-56332013000100007&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[El canakinumab es un anticuerpo monoclonal anti-IL-1&beta; totalmente humano desarrollado por Novartis, cuyo mecanismo de acción se basa en la neutralización de la señalización IL-1&beta;, lo cual conduce a la supresión de la inflamación en pacientes con trastornos de origen autoinmune. La IL-1&beta; actúa como un mediador de la respuesta inmune periférica durante la infección y la inflamación. Mediante la unión antígeno-anticuerpo el canakinumab inhibe la acción de la IL1-&beta; evitando sus efectos pro-inflamatorios. En la actualidad, está en evaluación como un nuevo posible agente dirigido frente a la IL-1&beta;, con el objetivo de reducir la tasa de eventos cardiovasculares y la diabetes de aparición reciente (estudio CANTOS).]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Canakinumab is a totally human monoclonal antibody anti-IL-1&beta; developed by Novartis, whose mode of action is based on the neutralization of IL-1&beta; signaling, which leads to suppression of inflammation in patients with autoimmune disorders. The IL-1&beta; acts as a mediator of the peripheral immune response during infection and inflammation. By the antigen-antibody binding, canakinumab inhibits the action of IL1-&beta; avoiding its pro-inflammatory effects. Currently, it is being evaluated as a new possible agent directed against IL-1&beta;, with the goal of reducing the rate of cardiovascular events and new onset diabetes (study CANTOS).]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[factores de riesgo cardiovascular]]></kwd>
<kwd lng="es"><![CDATA[biomarcadores]]></kwd>
<kwd lng="es"><![CDATA[diagnóstico]]></kwd>
<kwd lng="en"><![CDATA[cardiovascular risk factors]]></kwd>
<kwd lng="en"><![CDATA[biomarkers]]></kwd>
<kwd lng="en"><![CDATA[diagnosis]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  <font size="2" face="Verdana">     <p><font size="4" face="Verdana">    <center>   <b>Canakinumab: un anticuerpo monoclonal prometedor en el tratamiento de enfermedades cardiovasculares</b> </center></font></p>     <p><font size="3" face="Verdana">    <center>   <b>Canakinumab: a promising monoclonal antibody in the treatment of cardiovascular diseases</b> </center></font></p>     <p>    <center>Fernando Manzur, MD., FACC.<sup>(1,2)</sup>; Carlos Moneriz, MD.<sup>(1)</sup></center></p>     <p><sup>(1)</sup>	Universidad de Cartagena. Cartagena, Colombia.    <br> <sup>(2)</sup>	Nuevo Hospital Bocagrande. Cartagena, Colombia.</p>     <p><b><i>Correspondencia</i></b>: Dr. Fernando Manzur, Cartagena, Colombia. Correo electr&oacute;nico: <a href="mailto:fmanzur1954@hotmail.com">fmanzur1954@hotmail.com</a>. Dr. Carlos Moneriz, Cartagena, Colombia. Correo electr&oacute;nico: <a href="mailto:cmonerizpretel@yahoo.com">cmonerizpretel@yahoo.com</a></p>     ]]></body>
<body><![CDATA[<p>Recibido: 04/05/2012. Aceptado: 21/08/2012.</p> <hr size="1">     <p> El canakinumab es un anticuerpo monoclonal anti-IL-1&beta; totalmente humano desarrollado por Novartis, cuyo mecanismo de acci&oacute;n se basa en la neutralizaci&oacute;n de la se&ntilde;alizaci&oacute;n IL-1&beta;, lo cual conduce a la supresi&oacute;n de la inflamaci&oacute;n en pacientes con trastornos de origen autoinmune. La IL-1&beta; act&uacute;a como un mediador de la respuesta inmune perif&eacute;rica durante la infecci&oacute;n y la inflamaci&oacute;n. Mediante la uni&oacute;n ant&iacute;geno-anticuerpo el canakinumab inhibe la acci&oacute;n de la IL1-&beta; evitando sus efectos pro-inflamatorios. En la actualidad, est&aacute; en evaluaci&oacute;n como un nuevo posible agente dirigido frente a la IL-1&beta;, con el objetivo de reducir la tasa de eventos cardiovasculares y la diabetes de aparici&oacute;n reciente (estudio CANTOS).</p>       <p><b><i>Palabras clave</i></b>: factores de riesgo cardiovascular, biomarcadores, diagn&oacute;stico.</p> <hr size="1">       <p>Canakinumab is a totally human monoclonal antibody anti-IL-1&beta; developed by Novartis, whose mode of action is based on the neutralization of IL-1&beta; signaling, which leads to suppression of inflammation in patients with autoimmune disorders. The IL-1&beta; acts as a mediator of the peripheral immune response during infection and inflammation. By the antigen-antibody binding, canakinumab inhibits the action of IL1-&beta; avoiding its pro-inflammatory effects. Currently, it is being evaluated as a new possible agent directed against IL-1&beta;, with the goal of reducing the rate of cardiovascular events and new onset diabetes (study CANTOS).</p>       <p><b><i>Keywords</i></b>: cardiovascular risk factors, biomarkers, diagnosis.</p> <hr size="1">      <p><font size="3" face="Verdana"><b>Introducci&oacute;n</b></font> </p>       <p>El canakinumab, un anticuerpo monoclonal totalmente humanizado desarrollado por Novartis Pharma, es un f&aacute;rmaco biotecnol&oacute;gico anti-interleuquina-1&beta; (IL-1&beta;) que pertenece al isotipo IgG1/k (1) y que ha sido utilizado en el tratamiento de los s&iacute;ndromes peri&oacute;dicos asociados a la criopirina (CAPS, del ingl&eacute;s cryopyrin-associated periodic syndromes) (2-5). Los CAPS son un conjunto de s&iacute;ndromes autoinflamatorios de muy baja prevalencia, que presentan herencia autos&oacute;mica dominante, incluyendo entidades como el s&iacute;ndrome de Muckle-Wells (MWS) (6), el s&iacute;ndrome autoinflamatorio familiar inducido por el fr&iacute;o (FCAS, del ingl&eacute;s familial cold induced autoinflammatory syndrome), y la enfermedad neonatal multisist&eacute;mica inflamatoria (NOMID, del ingl&eacute;s neonatal onset multisystem inflammatory disease) tambi&eacute;n conocida como CINCA (chronic, infantile neurological, cutaneous, articular syndrome) (7, 8).</p>       <p>Este f&aacute;rmaco ha sido designado como medicamento hu&eacute;rfano por la FDA (US Food and Drug Administration) y por la EMEA (European Medicines Agency) y en junio de 2009 la primera de estas entidades lo aprob&oacute; para el tratamiento de dos formas de CAPS: el s&iacute;ndrome de Muckle-Wells (MWS) y el FACS (1). El producto fue aprobado en Suiza para estas formas de CAPS en julio de 2009, as&iacute; como para la enfermedad inflamatoria multisist&eacute;mica de inicio neonatal (NOMID) (1, 9-14).</p>     <p>Estos s&iacute;ndromes cursan con una actividad excesiva de la criopirina y el incremento consiguiente en la producci&oacute;n de IL-1&beta;. La prote&iacute;na criopirina contiene un dominio N-terminal pirina y tiene un papel importante en la regulaci&oacute;n del ensamblaje del inflamasoma, un grupo de prote&iacute;nas intracelulares que cuando se agrupan favorecen la activaci&oacute;n de IL-1&beta;. Las mutaciones en la criopirina est&aacute;n asociadas con activaci&oacute;n aumentada de la caspasa-1, la enzima que cataliza la escisi&oacute;n del precursor de IL-1&beta; (Pro-IL-1&beta;), para generar IL-1&beta; activa en exceso (8, 15, 16).</p>     <p><b><font size="3" face="Verdana">Mecanismo de acci&oacute;n del canakinumab</font>  </b></p>     ]]></body>
<body><![CDATA[<p>El canakinumab se une a la IL-1&beta; y bloquea la interacci&oacute;n de esta citoquina con sus receptores tipos I y II. La se&ntilde;alizaci&oacute;n de la IL-1 est&aacute; controlada por un complejo de prote&iacute;nas citopl&aacute;smicas denominado inflamasoma, el cual favorece la maduraci&oacute;n y secreci&oacute;n de citoquinas proinflamatorias como la IL-1&beta; y la IL-18. El inflamasoma relacionado con la criopirina o NLRP3 (nucleotide-binding leucine-rich repeat-containing pyrin receptor 3) es el mejor estudiado hasta la fecha. Se compone de la prote&iacute;na NLRP3 junto con ASC (apoptosis-associated speck-like proteine), procaspasa 1, y en algunos casos, cardinal. El receptor NLRP3 puede ser activado por diversos agentes, tales como microorganismos pat&oacute;genos, ATP extracelular, s&iacute;lice, asbesto inhalado y factores de estr&eacute;s y, de forma end&oacute;gena, por cristales de urato monos&oacute;dico (17).</p>       <p>Estas se&ntilde;ales de est&iacute;mulo entran en monocitos y macr&oacute;fagos activando la prote&iacute;na NLRP3, la cual se despliega y se ensambla con los otros componentes proteicos del inflamasoma (<a href="img/revistas/rcca/v20n1/v20n1a7f1.gif" target="_blank">Figura 1</a>). Esta oligomerizaci&oacute;n induce la escisi&oacute;n de procaspasa 1 para formar la caspasa 1 activa, que a su vez escinde a la pro IL-1 &beta; para producir IL-1&beta;, la cual es liberada de las c&eacute;lulas (18). La IL-1&beta; es una citoquina proinflamatoria que se produce principalmente en las c&eacute;lulas mieloides y que tiene efectos pleiotr&oacute;picos. Su s&iacute;ntesis y liberaci&oacute;n est&aacute; regulada por el antagonista del receptor IL-1 (IL-1Ra), un antagonista de la IL-1&beta; y la IL-1&beta;. La uni&oacute;n de IL-1&beta; a su receptor de IL-1R tipo I (IL-1RI) conduce a la se&ntilde;alizaci&oacute;n intracelular y la transcripci&oacute;n de otros genes proinflamatorios, de ah&iacute; que la desregulaci&oacute;n de la producci&oacute;n de IL-1&beta; conlleve consecuencias patol&oacute;gicas (19-21).</p>     <p>La IL-1&beta; liberada de la c&eacute;lula provoca respuestas inflamatorias, incluyendo:</p>     <p>&bull;	Estimulaci&oacute;n de la producci&oacute;n y liberaci&oacute;n de las prote&iacute;nas de fase aguda del h&iacute;gado por efecto directo sobre &eacute;ste o mediante la estimulaci&oacute;n de la producci&oacute;n de IL-6 a partir de c&eacute;lulas endoteliales.    <br>   &bull;	Acci&oacute;n sobre el hipot&aacute;lamo para inducir fiebre y sensibilizaci&oacute;n al dolor.    <br> &bull;	Acci&oacute;n sobre el hueso para inducir resorci&oacute;n &oacute;sea y rotura del cart&iacute;lago, que induce la producci&oacute;n y activaci&oacute;n de linfocitos, neutr&oacute;filos y plaquetas.</p>     <p>IL-1&beta; tambi&eacute;n act&uacute;a v&iacute;a realimentaci&oacute;n positiva para inducir la producci&oacute;n adicional de IL-1&beta; por uni&oacute;n a receptores en monocitos y macr&oacute;fagos que inducen la activaci&oacute;n de las v&iacute;as de se&ntilde;alizaci&oacute;n de NF-kB, dando lugar a la regulaci&oacute;n de la transcripci&oacute;n del ARNm de IL-1&beta; y al aumento de la producci&oacute;n de pro IL-1&beta; (<a href="img/revistas/rcca/v20n1/v20n1a7f1.gif" target="_blank">Figura 1</a>) (18, 22). Mediante la uni&oacute;n ant&iacute;geno-anticuerpo, el canakinumab inhibe la acci&oacute;n de la IL1-&beta; evitando sus efectos pro-inflamatorios.</p>     <p><b><font size="3" face="Verdana">La IL-1 y sus efectos proinflamatorios</font>   </b></p>       <p>La interleuquina-1 (IL-1) consta de un grupo de citoquinas que activan la expresi&oacute;n de varios genes pro-inflamatorios. Hay dos receptores de IL-1: receptor tipo 1 de IL-1 (IL-1RI) y receptor tipo 2 de IL-1 (IL-1 RII). Los genes de la familia de la IL-1 codifican tres prote&iacute;nas principales: la IL-1&alpha; y la IL-1&beta; (que ejercen efectos pleiotr&oacute;picos proinflamatorios en una variedad de c&eacute;lulas mediante la uni&oacute;n al receptor de IL-1 tipo I) y el antagonista del receptor de IL-1 (IL-1Ra; un inhibidor end&oacute;geno que inhibe competitivamente la uni&oacute;n de las IL-1&alpha; y &beta; al receptor de IL-1 tipo I). El balance de los efectos pro y anti-inflamatorios mediados a trav&eacute;s de la IL-1 y la IL-1Ra tambi&eacute;n depende del receptor de IL-1 tipo II que act&uacute;a como un &quot;receptor se&ntilde;uelo&quot; y no genera transducci&oacute;n de se&ntilde;al intracelular (23, 24). Diversas observaciones cl&iacute;nicas apoyan el concepto de que el balance neto de la actividad inflamatoria influenciado por los niveles relativos de la IL-1 y la IL-1Ra, pueden contribuir a enfermedad humana (<a href="#figura2">Figura 2</a>) (25). Tras la uni&oacute;n de la IL-1 a IL-1RI, un segundo receptor denominado prote&iacute;na accesoria del receptor IL-1 (IL-1RAcP) se recluta en la membrana celular para formar un complejo de uni&oacute;n de alta afinidad que conduce a la se&ntilde;alizaci&oacute;n intracelular (1, 26).</p>     <p>    ]]></body>
<body><![CDATA[<center>     <a name="figura2"></a>    <br>     <img src="img/revistas/rcca/v20n1/v20n1a7f2.gif">   </center></p>     <p>La IL-1&beta; act&uacute;a como un mediador de la respuesta inmune perif&eacute;rica durante la infecci&oacute;n y la inflamaci&oacute;n (27). Esta citoquina fue descrita al principio como un pir&oacute;geno leucocitario, y puede mediar los s&iacute;ntomas de fiebre, fatiga, dolor y artritis, as&iacute; como las respuestas hep&aacute;ticas de fase aguda, incluyendo la s&iacute;ntesis de la prote&iacute;na C reactiva (PCR) y la prote&iacute;na amiloide A s&eacute;rica (SAA) (28).</p>     <p><b><font size="3" face="Verdana">Interleuquina-1 y aterotrombosis</font></b></p>     <p>Aunque muchos tipos de c&eacute;lulas pueden producir miembros de la familia de la IL-1, son los monocitos, macr&oacute;fagos y c&eacute;lulas de la placa ateroscler&oacute;tica los que producen la mayor parte de la IL-1&beta; (22). Evidencias experimentales acumuladas durante los &uacute;ltimos veinticinco a&ntilde;os han demostrado la implicaci&oacute;n de la IL-1 en los procesos aterotromb&oacute;ticos (25). La placa ateroscler&oacute;tica humana contiene tanto a la IL-1&beta; como a la IL-1Ra, y el balance no regulado entre citoquinas pro y anti-inflamatorias es un factor determinante en la patog&eacute;nesis de la enfermedad (29-31).</p>       <p>Adem&aacute;s, estudios recientes han demostrado que para la activaci&oacute;n de la IL-1&beta;, el inflamasoma NLRP3 no s&oacute;lo responde frente a bacterias, cristales de &aacute;cido &uacute;rico y cristales de pirofosfato, sino tambi&eacute;n a cristales de colesterol y m&iacute;nimamente al colesterol LDL modificado (17, 32). Los cristales de colesterol que abundan en las lesiones ateroscler&oacute;ticas, aumentan la secreci&oacute;n de IL-1&beta; mediante la activaci&oacute;n de la v&iacute;a del inflamasoma en macr&oacute;fagos humanos (17).</p>       <p>La inflamaci&oacute;n cr&oacute;nica de la pared arterial es un elemento clave en la patog&eacute;nesis de la aterosclerosis. Los sitios de desarrollo de la placa ateroscler&oacute;tica en la pared arterial se caracterizan por la acumulaci&oacute;n de colesterol y la infiltraci&oacute;n de monocitos de sangre perif&eacute;rica, que gradualmente se diferencian de macr&oacute;fagos. Una vez activados, los monocitos y macr&oacute;fagos segregan gran cantidad de citoquinas que promueven la inflamaci&oacute;n en la pared arterial (33-35). La aterosclerosis se asocia con la activaci&oacute;n de procesos inflamatorios y con aumento sist&eacute;mico de mol&eacute;culas proinflamatorias como la IL-1, la IL-6, el TNF y la prote&iacute;na C-reactiva (36).</p>     <p>La IL-1&beta; es una potente citoquina pro-aterog&eacute;nica de la cual se ha demostrado una correlaci&oacute;n entre sus niveles en las arterias coronarias ateroscler&oacute;ticas y la severidad de la enfermedad. El mecanismo sugerido para la activaci&oacute;n del receptor NLRP3 por cristales de colesterol, implica la salida de potasio y la liberaci&oacute;n de catepsina B en el citoplasma (<a href="#figura3">Figura 3</a>), con la consiguiente liberaci&oacute;n de IL-1&beta; (17). En consecuencia, la activaci&oacute;n del inflamasoma por los cristales de colesterol representa un importante v&iacute;nculo entre el metabolismo del colesterol y la inflamaci&oacute;n en las lesiones ateroscler&oacute;ticas.</p>     <p>    <center>     <a name="figura3"></a>    ]]></body>
<body><![CDATA[<br>     <img src="img/revistas/rcca/v20n1/v20n1a7f3.gif">   </center></p>     <p><b><font size="3" face="Verdana">La hip&oacute;tesis inflamatoria de la aterotrombosis</font></b></p>     <p>La inflamaci&oacute;n contribuye en todas las fases del proceso aterotromb&oacute;tico incluyendo la ruptura de la placa que subyace en muchos eventos isqu&eacute;micos agudos en la circulaci&oacute;n coronaria y cerebral (29). En la actualidad se utiliza como biomarcador inflamatorio la prote&iacute;na C reactiva de alta sensibilidad (PCR-hs) para identificar a los individuos con alto riesgo de eventos cardiovasculares, incluso en ausencia de hiperlipidemia y otros factores importantes de riesgo cardiovascular (37).</p>       <p>La hip&oacute;tesis inflamatoria de la aterosclerosis se destaca por varias observaciones adicionales. En primer lugar, a pesar de la clara importancia de la lipoprote&iacute;na de baja densidad (LDL) como un factor de riesgo y la utilidad comprobada de la reducci&oacute;n de LDL como una modalidad terap&eacute;utica, la mitad de todas las infecciones del miocardio y los accidentes cerebro-vasculares se producen en hombres y mujeres aparentemente sanos con promedio o incluso bajos niveles de colesterol. En segundo lugar, en la mayor&iacute;a de los ensayos realizados hasta la fecha para disminuir los l&iacute;pidos, la reducci&oacute;n del riesgo relativo de eventos vasculares asociados en la terapia con estatinas ha sido en gran medida independiente de la l&iacute;nea base de los niveles de colesterol LDL (25).</p>     <p>M&uacute;ltiples estudios de cohorte prospectivos tambi&eacute;n demuestran la importancia de la PCR-hs como un predictor independiente de riesgo vascular. En otros estudios se demostr&oacute; tambi&eacute;n que los niveles bajos de PCR-hs contribuyen a la reducci&oacute;n de los niveles de colesterol LDL (38). Por ejemplo, en un ensayo que compar&oacute; atorvastatina con pravastatina, los pacientes que en el tratamiento ten&iacute;an niveles de la PCR-hs mayores a 2 mg/L, ten&iacute;an un riesgo sustancialmente mayor de eventos cardiovasculares recurrentes en comparaci&oacute;n con aquellos que durante el tratamiento lograron niveles de PCR-hs menores a 2 mg/L (39) (<a href="#figura4">Figura 4</a>). Un enfoque muy prometedor a esta problem&aacute;tica es la inhibici&oacute;n de la IL-1&beta;, una potente citoquina proinflamatoria que desempe&ntilde;a m&uacute;ltiples funciones en el proceso aterotromb&oacute;tico.</p>     <p>    <center>     <a name="figura4"></a>    <br>     <img src="img/revistas/rcca/v20n1/v20n1a7f4.gif">   </center></p>       <p><b><font size="3" face="Verdana">Efectos cardiacos relacionados con la IL-1</font> </b></p>     <p>Los niveles circulantes de IL-1 se asocian con la presencia de factores de riesgo card&iacute;acos tradicionales, como diabetes mellitus, hipertensi&oacute;n arterial, tabaquismo y dislipidemia. Los niveles elevados de IL-1 generan secreci&oacute;n de citoquinas y quimiocinas, aumento de expresi&oacute;n de mol&eacute;culas de adhesi&oacute;n, activaci&oacute;n y proliferaci&oacute;n de c&eacute;lulas endoteliales, activaci&oacute;n de macr&oacute;fagos y aumento de permeabilidad vascular (31). Los pacientes con infarto del miocardio presentan niveles significativamente elevados de citoquinas proinflamatorias como la IL-1, la IL-6 y el TNF (36). Otros estudios tambi&eacute;n han demostrado que la inflamaci&oacute;n generada en la diabetes tipo 2 est&aacute; mediada por la liberaci&oacute;n de IL-1&beta; (40, 41).</p>       ]]></body>
<body><![CDATA[<p>Los niveles de IL-1 e IL-1Ra son m&aacute;s elevados en pacientes con s&iacute;ndromes coronarios agudos en comparaci&oacute;n con pacientes asintom&aacute;ticos (42). Por otra parte, en los pacientes con infarto del miocardio que cursan con elevaci&oacute;n del ST, los niveles elevados de IL-1Ra preceden a los aumentos en los marcadores de necrosis mioc&aacute;rdicos como la troponina y la creatinina kinasa (43).</p>       <p>La IL-1 y otras citoquinas proinflamatorias tambi&eacute;n est&aacute;n implicadas en la progresi&oacute;n de insuficiencia card&iacute;aca, como consecuencia de sus efectos inotr&oacute;picos negativos y su acci&oacute;n nociva sobre la remodelaci&oacute;n del ventr&iacute;culo izquierdo (44). La IL-1&beta; estimula: la liberaci&oacute;n de endotelina-1 y tambi&eacute;n estimula la actividad de la &oacute;xido n&iacute;trico sintasa; esta enzima genera &oacute;xido n&iacute;trico que en uni&oacute;n con el ox&iacute;geno aumenta la formaci&oacute;n de radicales libres, lo que conduce a estr&eacute;s, oxidaci&oacute;n y disfunci&oacute;n endotelial (17, 31).</p>     <p>Dado el fuerte v&iacute;nculo entre la IL-1 y la enfermedad arterial coronaria y la experiencia favorable con canakinumab en pacientes con otras patolog&iacute;as inflamatorias, ha crecido el inter&eacute;s en la aplicaci&oacute;n del tratamiento anti-IL-1 con canakinumab en pacientes con enfermedad cardiovascular.</p>     <p><b><font size="3" face="Verdana">Estudio CANTOS (Canakinumab Anti-inflammatory Thrombosis Outcomes Study)</font>  </b></p>     <p>Hoy el canakinumab est&aacute; siendo estudiado como un nuevo posible agente dirigido frente a la IL-1&beta;, con el objetivo de reducir la tasa de eventos cardiovasculares y la diabetes de nueva aparici&oacute;n. Dado el papel de la IL-1&beta; en la aterotrombosis, el uso de inhibidores de la IL-1&beta; como es el caso del canakinumab, ha generado un inter&eacute;s considerable como un posible m&eacute;todo para reducir el riesgo vascular (25).</p>       <p>En pacientes con CAPS, artritis reumatoide y diabetes tipo 2, el canakinumab produce una inhibici&oacute;n r&aacute;pida y sostenida de la respuesta de fase aguda que resulta en reducciones sustanciales de la PCR y la IL-6. Adem&aacute;s, este anticuerpo s&oacute;lo tiene efectos marginales sobre los niveles de l&iacute;pidos, y por tanto, proporciona un nuevo m&eacute;todo para ensayar directamente la hip&oacute;tesis inflamatoria de la aterotrombosis por inhibici&oacute;n de la inflamaci&oacute;n (25).</p>       <p>El objetivo principal del estudio CANTOS es determinar si el tratamiento prolongado con canakinumab (50, 150 &oacute; 300 mg SC cada tres meses) en comparaci&oacute;n con el placebo, reduce la tasa de recurrencia de eventos cardiovasculares en pacientes estables con post-infarto del miocardio que presentan niveles aumentados de PCR-hs (&gt; 2 mg/L) (25). En un esfuerzo multinacional en colaboraci&oacute;n con varios pa&iacute;ses, este estudio trabajar&aacute; aproximadamente con 17.200 participantes (mayores de 18 a&ntilde;os) que se someter&aacute;n a seguimiento durante un per&iacute;odo estimado de hasta cuatro a&ntilde;os. El objetivo primario estar&aacute; orientado a determinar la recurrencia de eventos cardiovasculares mayores, definidos como infarto del miocardio no fatal, ictus no mortal o muerte cardiovascular. El objetivo secundario del estudio CANTOS incluye la determinaci&oacute;n de la seguridad y eficacia de la terapia con canakinumab sobre la mortalidad total en pacientes post-infartados y su relaci&oacute;n con otros eventos vasculares, incluyendo la hospitalizaci&oacute;n por angina inestable con necesidad de revascularizaci&oacute;n (25). Por otra parte, este estudio tambi&eacute;n evaluar&aacute; si canakinumab reduce la incidencia de diabetes de nueva aparici&oacute;n, teniendo como par&aacute;metro si posee glicemia en ayunas normal o alterada.</p>       <p>Por &uacute;ltimo, el CANTOS tambi&eacute;n abordar&aacute; el impacto de la inhibici&oacute;n de IL-1&beta; con canakinumab sobre la incidencia de varias enfermedades cl&iacute;nicas conocidas y su asociaci&oacute;n con la inflamaci&oacute;n cr&oacute;nica, incluyendo tromboembolismo venoso, fibrilaci&oacute;n auricular, trombosis por stent, hospitalizaci&oacute;n por insuficiencia cardiaca congestiva y degeneraci&oacute;n macular. Adicionalmente, mostrar&aacute; el impacto de canakinumab sobre los biomarcadores plasm&aacute;ticos de riesgo cardiovascular y diabetes, as&iacute; como el efecto de canakinumab en la nefropat&iacute;a seg&uacute;n la evaluaci&oacute;n de la excreci&oacute;n urinaria de alb&uacute;mina-creatinina en pacientes con diabetes tipo 2 o con glicemia alterada en ayunas al inicio del estudio (25).</p>     <p>El estudio CANTOS es patrocinado por Novartis y fue iniciado y dise&ntilde;ado por investigadores en el Centro de Prevenci&oacute;n de Enfermedades Cardiovasculares en el Brigham and Women's Hospital, Harvard Medical School (Boston), en colaboraci&oacute;n con investigadores del laboratorio en menci&oacute;n.</p>     <p><font size="3" face="Verdana"><b>Conclusiones</b></font></p>     ]]></body>
<body><![CDATA[<p>En la actualidad existen gran variedad de agentes que bloquean la IL-1. En tal aspecto, el canakinumab, un anticuerpo monoclonal totalmente humano, frente a la IL-1&beta;, ha mostrado su eficacia en el control de los s&iacute;ntomas de enfermos afectados de CAPS y otros procesos autoinflamatorios. Su efecto es r&aacute;pido y mantenido, y sus propiedades est&aacute;n siendo evaluadas en el tratamiento de enfermedad cardiovascular (estudio CANTOS). De ser positivos los resultados, CANTOS confirmar&iacute;a la hip&oacute;tesis inflamatoria de la aterotrombosis, y proporcionar&iacute;a una nueva terapia basada en la inhibici&oacute;n de citoquinas para la prevenci&oacute;n secundaria de enfermedad cardiovascular y nuevas formas de diabetes.</p>     <p><font size="3" face="Verdana"><b>Bibliograf&iacute;a</b></font></p>     <!-- ref --><p>1.	Dhimolea E. Canakinumab. MAbs 2010; 2 (1): 3-13.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000065&pid=S0120-5633201300010000700001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>       <!-- ref --><p>2.	Curran MP. Canakinumab: in patients with cryopyrin-associated periodic syndromes. BioDrugs 2012; 26 (1): 53-9.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000067&pid=S0120-5633201300010000700002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>       <!-- ref --><p>3.	Kone-Paut I, Lachmann HJ, Kuemmerle-Deschner JB, Hachulla E, Leslie KS, Mouy R, et al. Sustained remission of symptoms and improved health-related quality of life in patients with cryopyrin-associated periodic syndrome treated with canakinumab: results of a double-blind placebo-controlled randomized withdrawal study. Arthritis Res Ther 2011; 13 (6): R202.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000069&pid=S0120-5633201300010000700003&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>       <!-- ref --><p>4.	Kuemmerle-Deschner JB, Hachulla E, Cartwright R, Hawkins PN, Tran TA, Bader-Meunier B, et al. Two-year results from an open-label, multicentre, phase III study evaluating the safety and efficacy of canakinumab in patients with cryopyrin-associated periodic syndrome across different severity phenotypes. Ann Rheum Dis 2011; 70 (12): 2095-102.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000071&pid=S0120-5633201300010000700004&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>       ]]></body>
<body><![CDATA[<!-- ref --><p>5.	Yokota S, Kikuchi M, Nozawa T, Kizawa T, Kanetaka T, Miyamae T, et al. An approach to the patients with cryopyrin-associated periodic syndrome (CAPS): a new biologic response modifier, canakinumab. Nihon Rinsho Meneki Gakkai Kaishi 2012; 35 (1): 23-9.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000073&pid=S0120-5633201300010000700005&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>       <!-- ref --><p>6.	Mueller SM, Itin P, Haeusermann P. Muckle-Wells syndrome effectively treated with canakinumab: is the recommended dosing schedule mandatory? Dermatology 2011; 223 (2): 113-8.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000075&pid=S0120-5633201300010000700006&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>       <!-- ref --><p>7.	Yu JR, Leslie KS. Cryopyrin-associated periodic syndrome: an update on diagnosis and treatment response. Curr Allergy Asthma Rep 2011; 11 (1): 12-20.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000077&pid=S0120-5633201300010000700007&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>       <!-- ref --><p>8.	Toker O, Hashkes PJ. Critical appraisal of canakinumab in the treatment of adults and children with cryopyrin-associated periodic syndrome (CAPS). Biologics 2010; 4: 131-8.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000079&pid=S0120-5633201300010000700008&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>       <!-- ref --><p>9.	So A, De Meulemeester M, Pikhlak A, Yucel AE, Richard D, Murphy V, et al. Canakinumab for the treatment of acute flares in difficult-to-treat gouty arthritis: Results of a multicenter, phase II, dose-ranging study. Arthritis Rheum 2010; 62 (10): 3064-76.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000081&pid=S0120-5633201300010000700009&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>       ]]></body>
<body><![CDATA[<!-- ref --><p>10.	Schlesinger N, Mysler E, Lin HY, De Meulemeester M, Rovensky J, Arulmani U, et al. Canakinumab reduces the risk of acute gouty arthritis flares during initiation of allopurinol treatment: results of a double-blind, randomised study. Ann Rheum Dis 2011; 70 (7): 1264-71.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000083&pid=S0120-5633201300010000700010&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>       <!-- ref --><p>11.	Alten R, Gomez-Reino J, Durez P, Beaulieu A, Sebba A, Krammer G, et al. Efficacy and safety of the human anti-IL-1beta monoclonal antibody canakinumab in rheumatoid arthritis: results of a 12-week, phase II, dose-finding study. BMC Musculoskelet Disord 2011; 12: 153.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000085&pid=S0120-5633201300010000700011&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>       <!-- ref --><p>12.	Mitroulis I, Skendros P, Oikonomou A, Tzioufas AG, Ritis K. The efficacy of canakinumab in the treatment of a patient with familial mediterranean fever and longstanding destructive arthritis. Ann Rheum Dis 2011; 70 (7): 1347-8.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000087&pid=S0120-5633201300010000700012&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>       <!-- ref --><p>13.	Ruperto N, Quartier P, Wulffraat N, Woo P, Ravelli A, Mouy R, et al. A phase II, multicenter, open-label study evaluating dosing and preliminary safety and efficacy of canakinumab in systemic juvenile idiopathic arthritis with active systemic features. Arthritis Rheum 2012; 64 (2): 557-67.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000089&pid=S0120-5633201300010000700013&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>       <!-- ref --><p>14.	Schlesinger N, De Meulemeester M, Pikhlak A, Yucel AE, Richard D, Murphy V, et al. Canakinumab relieves symptoms of acute flares and improves health-related quality of life in patients with difficult-to-treat Gouty Arthritis by suppressing inflammation: results of a randomized, dose-ranging study. Arthritis Res Ther 2011; 13 (2): R53.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=000091&pid=S0120-5633201300010000700014&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></p>       ]]></body>
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