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<front>
<journal-meta>
<journal-id>1812-9528</journal-id>
<journal-title><![CDATA[Memorias del Instituto de Investigaciones en Ciencias de la Salud]]></journal-title>
<abbrev-journal-title><![CDATA[Mem. Inst. Investig. Cienc. Salud]]></abbrev-journal-title>
<issn>1812-9528</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Investigaciones en Ciencias de la Salud]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1812-95282015000200015</article-id>
<article-id pub-id-type="doi">10.18004/Mem.iics/1812-9528/2015.013(02)127-138</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Morbimortalidad cardiopulmonar en pacientes con lupus eritematoso sistémico]]></article-title>
<article-title xml:lang="en"><![CDATA[Cardiopulmonary morbidity and mortality in patients with systemic lupus erythematosus]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aquino Valdovinos]]></surname>
<given-names><![CDATA[Alicia]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Acosta Colmán]]></surname>
<given-names><![CDATA[María Isabel]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Centurión]]></surname>
<given-names><![CDATA[Osmar Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ávila Pedretti]]></surname>
<given-names><![CDATA[Gabriela]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Losanto]]></surname>
<given-names><![CDATA[Jhonatan]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Duarte]]></surname>
<given-names><![CDATA[Margarita]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Nacional de Asunción Hospital de Clínicas Departamento de Reumatología]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad Nacional de Asunción Hospital de Clínicas Primera Cátedra de Clínica Médica]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2015</year>
</pub-date>
<volume>13</volume>
<numero>2</numero>
<fpage>126</fpage>
<lpage>137</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_arttext&amp;pid=S1812-95282015000200015&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_abstract&amp;pid=S1812-95282015000200015&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.iics.una.py/scielo.php?script=sci_pdf&amp;pid=S1812-95282015000200015&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Los pacientes con diagnóstico de lupus eritematoso sistémico (LES) presentan una elevada morbi-mortalidad asociada a las manifestaciones cardiopulmonares que se desarrollan durante la evolución de la enfermedad. En este sentido, se han descrito dos picos de incidencia de mortalidad de esta enfermedad inmunológica. El primer pico está relacionado a la actividad de la enfermedad y se observa durante los tres primeros años posteriores al diagnóstico. El segundo pico está relacionado principalmente a las complicaciones cardiopulmonares y se presenta entre los 4 y 20 años posteriores al diagnóstico. Si bien la mortalidad temprana ha disminuido gracias a un mayor conocimiento de la fisiopatología de la enfermedad y al uso de terapias inmunosupresoras, la mortalidad tardía presenta un aumento progresivo de su frecuencia a pesar del avance en el manejo terapéutico. El estudio de estas complicaciones se ha convertido en un tema de gran interés debido a su efecto negativo en el pronóstico de los pacientes que las presentan. Algunos estudios epidemiológicos sugieren que los pacientes con LES tienen un mayor riesgo cardiovascular al ser comparados con la población sana. En este sentido, se ha descrito que estos presentan un mayor riesgo de desarrollar eventos cardiovasculares (infarto agudo del miocardio, accidente cerebro vascular y enfermedad arterial periférica) en comparación con la población general. De forma asociada, se ha objetivado que la presencia de manifestaciones pleuro-pulmonares (pleuritis lúpica, neumonitis, hemorragia pulmonar, embolismo pulmonar e hipertensión pulmonar) aumenta la morbimortalidad de los pacientes con LES. El conocimiento adecuado de las complicaciones cardiopulmonares en los pacientes con diagnóstico de lupus eritematoso sistémico permitirá realizar un manejo individualizado y por lo tanto más eficaz, permitiendo disminuir la morbilidad asociada a las citadas complicaciones. El objetivo de este manuscrito es realizar una revisión de la literatura sobre las principales manifestaciones cardiopulmonares, además de analizar la morbilidad y mortalidad asociada a ellas dentro del contexto clínico de los pacientes con LES.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Patients with the diagnosis of systemic lupus erythematosus (SLE) have an elevated morbidity and mortality from cardiopulmonary complications that develop during the evolution of the disease. Considering the incidence of the mortality in this immunologic disease, two peaks have been described. The first one is related to the immune activity itself and it is observed in the first three years the diagnosis. The second peak is related to the cardiopulmonary complications and it is observed after 4 to 20 years after diagnosis. Although, early mortality has diminished due to better knowledge of the physiopathology of the disease and to the use of immunosuppressive drugs, late mortality has a progressive increment despite advances in the therapeutic management. There is a great interest in the study of these complications due to the negative impact on the prognosis of the SLE patients. Some epidemiologic studies suggest that patients with SLE have a higher cardiovascular risk than the healthy population. Indeed, they have greater risk of developing cardiovascular events (acute myocardial infarction, cerebrovascular accidents, and peripheral artery disease) in comparison to the general population. The presence of pulmonary complications (pleuritic effusion, pneumonitis, pulmonary hemorrhage, pulmonary embolism, pulmonary hypertension) increases the mortality in SLE patients. The proper knowledge of the cardiopulmonary complications in SLE patients will provide an individual and more effective management allowing a decrease in morbidity and mortality. The aim of this manuscript is to revise the literature on cardiopulmonary complications and their associated morbidity and mortality in SLE patients.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[manifestaciones cardiopulmonares]]></kwd>
<kwd lng="es"><![CDATA[lupus eritematoso sistémico]]></kwd>
<kwd lng="es"><![CDATA[morbilidad y mortalidad cardiopulmonar]]></kwd>
<kwd lng="en"><![CDATA[cardiopulmonary manifestations]]></kwd>
<kwd lng="en"><![CDATA[systemic lupus erythematosus]]></kwd>
<kwd lng="en"><![CDATA[cardiopulmonary morbidity]]></kwd>
<kwd lng="en"><![CDATA[mortality]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="right"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Articulo de revisi&oacute;n/ Review Article</font></p>     <p>&nbsp;</p>     <p><font size="4" face="Verdana, Arial, Helvetica, sans-serif"><b>Morbimortalidad cardiopulmonar en pacientes con lupus eritematoso sist&eacute;mico</b></font></p>     <p>&nbsp;</p>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>Cardiopulmonary morbidity and mortality in patients with systemic lupus erythematosus</b></font></p>     <p>&nbsp;</p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b><a name="autor"></a><a href="#corres">*</a>Alicia Aquino Valdovinos<sup>I</sup>, Mar&iacute;a Isabel Acosta Colm&aacute;n<sup>I</sup>, Osmar Antonio Centuri&oacute;n<sup>II</sup>, Gabriela &Aacute;vila Pedretti<sup>I</sup>, Jhonatan Losanto<sup>I</sup>, Margarita Duarte<sup>I</sup></b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">I. Departamento de Reumatolog&iacute;a. Hospital de Cl&iacute;nicas. Universidad Nacional de Asunci&oacute;n    <br> II. Primera C&aacute;tedra de Cl&iacute;nica M&eacute;dica. Hospital de Cl&iacute;nicas. Universidad Nacional de Asunci&oacute;n</font></p>     <p>&nbsp;</p> <hr size "1" noshade>     ]]></body>
<body><![CDATA[<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">  Los pacientes con diagn&oacute;stico de lupus eritematoso sist&eacute;mico (LES) presentan una elevada morbi-mortalidad asociada a las manifestaciones cardiopulmonares que se desarrollan durante la evoluci&oacute;n de la enfermedad. En este sentido, se han descrito dos picos de incidencia de mortalidad de esta enfermedad inmunol&oacute;gica. El primer pico est&aacute; relacionado a la actividad de la enfermedad y se observa durante los tres primeros a&ntilde;os posteriores al diagn&oacute;stico. El segundo pico est&aacute; relacionado principalmente a las complicaciones cardiopulmonares y se presenta entre los 4 y 20 a&ntilde;os posteriores al diagn&oacute;stico. Si bien la mortalidad temprana ha disminuido gracias a un mayor conocimiento de la fisiopatolog&iacute;a de la enfermedad y al uso de terapias inmunosupresoras, la mortalidad tard&iacute;a presenta un aumento progresivo de su frecuencia a pesar del avance en el manejo terap&eacute;utico. El estudio de estas complicaciones se ha convertido en un tema de gran inter&eacute;s debido a su efecto negativo en el pron&oacute;stico de los pacientes que las presentan. Algunos estudios epidemiol&oacute;gicos sugieren que los pacientes con LES tienen un mayor riesgo cardiovascular al ser comparados con la poblaci&oacute;n sana. En este sentido, se ha descrito que estos presentan un mayor riesgo de desarrollar eventos cardiovasculares (infarto agudo del miocardio, accidente cerebro vascular y enfermedad arterial perif&eacute;rica) en comparaci&oacute;n con la poblaci&oacute;n general. De forma asociada, se ha objetivado que la presencia de manifestaciones pleuro-pulmonares (pleuritis l&uacute;pica, neumonitis, hemorragia pulmonar, embolismo pulmonar e hipertensi&oacute;n pulmonar) aumenta la morbimortalidad de los pacientes con LES. El conocimiento adecuado de las complicaciones cardiopulmonares en los pacientes con diagn&oacute;stico de lupus eritematoso sist&eacute;mico permitir&aacute; realizar un manejo individualizado y por lo tanto m&aacute;s eficaz, permitiendo disminuir la morbilidad asociada a las citadas complicaciones. El objetivo de este manuscrito es realizar una revisi&oacute;n de la literatura sobre las principales manifestaciones cardiopulmonares, adem&aacute;s de analizar la morbilidad y mortalidad asociada a ellas dentro del contexto cl&iacute;nico de los pacientes con LES.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Palabras clave:</b> manifestaciones cardiopulmonares, lupus eritematoso sist&eacute;mico, morbilidad y mortalidad cardiopulmonar.</font></p> <hr size "1" noshade>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>ABSTRACT</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Patients with the diagnosis of systemic lupus erythematosus (SLE) have an elevated morbidity and mortality from cardiopulmonary complications that develop during the evolution of the disease. Considering the incidence of the mortality in this immunologic disease, two peaks have been described. The first one is related to the immune activity itself and it is observed in the first three years the diagnosis. The second peak is related to the cardiopulmonary complications and it is observed after 4 to 20 years after diagnosis. Although, early mortality has diminished due to better knowledge of the physiopathology of the disease and to the use of immunosuppressive drugs, late mortality has a progressive increment despite advances in the therapeutic management. There is a great interest in the study of these complications due to the negative impact on the prognosis of the SLE patients. Some epidemiologic studies suggest that patients with SLE have a higher cardiovascular risk than the healthy population. Indeed, they have greater risk of developing cardiovascular events (acute myocardial infarction, cerebrovascular accidents, and peripheral artery disease) in comparison to the general population. The presence of pulmonary complications (pleuritic effusion, pneumonitis, pulmonary hemorrhage, pulmonary embolism, pulmonary hypertension) increases the mortality in SLE patients. The proper knowledge of the cardiopulmonary complications in SLE patients will provide an individual and more effective management allowing a decrease in morbidity and mortality. The aim of this manuscript is to revise the literature on cardiopulmonary complications and their associated morbidity and mortality in SLE patients.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Keywords:</b> cardiopulmonary manifestations, systemic lupus erythematosus, cardiopulmonary morbidity, mortality.</font></p> <hr size "1" noshade>     <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">  El Lupus Eritematoso Sist&eacute;mico (LES) es una enfermedad inflamatoria autoinmune y multisist&eacute;mica que se caracteriza por presentar diferentes manifestaciones cl&iacute;nicas constitucionales o especificas dependiendo del compromiso org&aacute;nico (1-4). Este compromiso org&aacute;nico se debe a un estado inflamatorio secundario a las alteraciones tanto del sistema inmune innato como del adaptativo (5-9).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">  La gravedad de esta enfermedad es variable y se ve influenciada por determinadas caracter&iacute;sticas. En este sentido, varios estudios han demostrado que el pron&oacute;stico de los pacientes con esta enfermedad est&aacute; influenciado por la etnia, el g&eacute;nero, la edad y factores socioecon&oacute;micos como los ingresos econ&oacute;micos, el nivel de educaci&oacute;n y el acceso a los servicios de salud (10-14).</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">  En relaci&oacute;n a la etnia, se han descrito diferencias en la incidencia y en el curso cl&iacute;nico de la enfermedad seg&uacute;n el diferente origen de los pacientes. Varios estudios han objetivado que los individuos de raza negra tienen una incidencia y prevalencia tres veces mayor que los individuos de raza blanca y que adem&aacute;s desarrollan la enfermedad de forma m&aacute;s temprana que &eacute;stos (15,16). Se ha descrito que el LES tiende a ser una enfermedad m&aacute;s grave en la poblaci&oacute;n de origen no cauc&aacute;sico. As&iacute; los pacientes de origen afroamericano, latinoamericano, y orientales presentan formas m&aacute;s graves de la enfermedad con una morbimortalidad aumentada. Con respecto a los pacientes de origen hisp&aacute;nico, se ha demostrado que &eacute;stos desarrollan una enfermedad m&aacute;s grave y con peores resultados terap&eacute;uticos que sus pares cauc&aacute;sicos (17-19).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">  En relaci&oacute;n a la mortalidad de la enfermedad, se ha descrito un patr&oacute;n bimodal en su incidencia, objetiv&aacute;ndose dos picos de la misma durante la evoluci&oacute;n de la enfermedad. El primero se observa durante los tres primeros a&ntilde;os posteriores al diagn&oacute;stico de la enfermedad, debido principalmente a infecciones, afectaci&oacute;n renal y al uso de corticoides. El segundo pico se relaciona principalmente con el desarrollo de aterosclerosis y enfermedad cardiovascular prematura, lo que ocasiona un aumento de la mortalidad dos veces mayor que el descrito en la poblaci&oacute;n general (1,20).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En algunos estudios epidemiol&oacute;gicos se sugiere que los pacientes con LES tienen un elevado riesgo cardiovascular en relaci&oacute;n a la poblaci&oacute;n sana. En ellos se ha descrito una mayor incidencia de infarto agudo del miocardio y de accidentes cerebrovasculares, adem&aacute;s de una mayor mortalidad asociada a dichos eventos (21).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En relaci&oacute;n a la morbimortalidad, la patolog&iacute;a pleuro-pulmonar es una complicaci&oacute;n que conlleva una mayor morbilidad en los pacientes con LES. Si bien la mayor&iacute;a de los pacientes no desarrollan una intersticiopat&iacute;a cl&iacute;nicamente evidente, el LES como patolog&iacute;a autoinmune es responsable del 2% de las muertes provocadas por una afectaci&oacute;n pulmonar (2,22).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">  Las manifestaciones cardiovasculares y pleuro-pulmonares aumentan la morbimortalidad de los pacientes con LES, por lo que un mayor conocimiento de estas complicaciones nos permitir&aacute; actuar de forma r&aacute;pida y eficaz, mejorando el pron&oacute;stico de los pacientes en etapas incipientes de esta enfermedad inmunol&oacute;gica. Por lo tanto, el objetivo del presente manuscrito es realizar una revisi&oacute;n de la morbimortalidad cardiovascular de los pacientes con lupus eritematoso sist&eacute;mico.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Etiopatogenia del Lupus Eritematoso Sist&eacute;mico</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">  Para poder comprender mejor las complicaciones cardiopulmonares y su morbimortalidad asociada es de suma importancia entender la etiopatogenia de esta enfermedad autoinmune. La patogenia del LES es compleja, por lo que es considerada la enfermedad m&aacute;s representativa de los procesos de naturaleza autoinmunitaria. Se caracteriza por la producci&oacute;n excesiva de autoanticuerpos, formaci&oacute;n de complejos inmunes y da&ntilde;o tisular mediado inmunol&oacute;gicamente (23).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">  La patolog&iacute;a tisular en todos los tejidos refleja una variedad de mecanismos inmunes aberrantes, pero el da&ntilde;o tisular en pacientes con LES tambi&eacute;n puede reflejar procesos no inmunes. Algunos de &eacute;stos, como la aterosclerosis temprana, pueden ser iniciados y acelerados a trav&eacute;s de mecanismos inmunol&oacute;gicos (22,24).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">  En el LES, la respuesta inmune adaptativa es aberrante, observ&aacute;ndos eanormalidades tanto de las c&eacute;lulas T como de las c&eacute;lulas B. Estas anormalidades incluyen defectos en la tolerancia de las c&eacute;lulas B, de las c&eacute;lulas T helper, as&iacute; como irregularidades intr&iacute;nsecas, funcionales y bioqu&iacute;micas de las c&eacute;lulas T (24,25). De forma asociada se observa una apoptosis alterada y un clearance de auto-anticuerpos defectuoso (26,27). La suma de todas estas alteraciones resulta en la producci&oacute;n de autoanticuerpos y de complejos inmunes circulantes (22,27).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">  Teniendo en cuenta lo mencionado en los p&aacute;rrafos previos, el LES puede ser considerado como la enfermedad modelo para la comprensi&oacute;n de la inmunopatog&eacute;nesis mediada por complejos inmunes. A diferencia de otras enfermedades autoinmunes que son &oacute;rgano espec&iacute;ficas, el LES se caracteriza por la capacidad de afectar a varios &oacute;rganos. Ciertamente la formaci&oacute;n de auto-anticuerpos, el dep&oacute;sito de inmunoglobulinas y la infiltraci&oacute;n de los tejidos por c&eacute;lulas mononucleares son las principales caracter&iacute;sticas de esta enfermedad (25,27).</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">  Las respuestas ant&iacute;geno-espec&iacute;ficas y las ant&iacute;geno no espec&iacute;ficas son importantes en la patogenia de la enfermedad, y se manifiestan a trav&eacute;s de un amplio rango de mecanismos patol&oacute;gicos, que incluyen la necrosis fibrinoide, los cuerpos de hematoxilina, la injuria vascular, la disrupci&oacute;n de la uni&oacute;n dermo-epidermica de la piel, y el desarrollo de glomerulonefritis.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">  <b>Factores Gen&eacute;ticos y No gen&eacute;ticos asociados a la patogenia del LES</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">  El lupus eritematoso sist&eacute;mico es una enfermedad compleja de etiolog&iacute;a desconocida, en la que est&aacute;n implicados factores gen&eacute;ticos y no gen&eacute;ticos. Entre los factores no gen&eacute;ticos, el g&eacute;nero, el uso de determinados f&aacute;rmacos, la exposici&oacute;n a ciertos pat&oacute;genos as&iacute; como la luz ultravioleta, se han asociado al desarrollo de esta enfermedad.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En relaci&oacute;n al g&eacute;nero, se ha sugerido que las hormonas femeninas tienen un rol importante en esta enfermedad, ya que el 90% de los pacientes con lupus son mujeres. De forma asociada, se ha estipulado que las hormonas femeninas podr&iacute;an tener un efecto importante en el desarrollo del LES mientras que las hormonas masculinas podr&iacute;an tener un rol protector para el desarrollo de esta enfermedad (28,29).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Existen determinados f&aacute;rmacos que pueden causar una variante del Lupus llamado &ldquo;Lupus inducido por drogas&rdquo;. En este sentido, existe una relaci&oacute;n establecida con la procainamida, la hidralazina y la quinidina. Las principales manifestaciones asociadas al lupus inducido por drogas son las manifestaciones d&eacute;rmicas y articulares, siendo las caracter&iacute;sticas renales y neurol&oacute;gicas poco frecuentes (22,28,30,31).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Los virus han sido uno de los factores m&aacute;s estudiados en el LES, presentando actualmente un rol importante, como probable factor ambiental que desencadena la enfermedad. En este sentido, se han descrito antecedentes de enfermedades virales al inicio del lupus o inmediatamente antes de una reca&iacute;da en los pacientes con enfermedad establecida. El virus del Epstein Barr (EBV) es considerado un pat&oacute;geno importante ya que se ha demostrado una asociaci&oacute;n temporal entre el inicio del Lupus y la infecci&oacute;n por este agente (32).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Por otro lado, la radiaci&oacute;n ultravioleta es el factor ambiental con una asociaci&oacute;n m&aacute;s robusta con la patogenia del LES. Un ejemplo de la importancia de este factor es que actualmente la fotosensibilidades considerada como uno de los criterios del Colegio Americano de Reumatolog&iacute;a para la clasificaci&oacute;n de la enfermedad (33,34).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Los factores gen&eacute;ticos poseen un papel importante en el desarrollo del LES. Se ha determinado que el rango de concordancia es del 25% para gemelos monocig&oacute;ticos y aproximadamente 2% para gemelos dicig&oacute;ticos (35). Estos rangos indican que la contribuci&oacute;n gen&eacute;tica es importante, pero no es suficiente para causar el LES. Se han identificado varios genes que probablemente contribuyen al Lupus gracias al estudio del genoma de familias con varios miembros afectos de LES.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Los genes del Complejo Mayor de la Histocompatibilidad (CMH), particularmente el HLA1, B8, y DR3 han sido relacionados con la patogenia del LES. La respuesta del Linfocito T a un ant&iacute;geno se inicia cuando un receptor molecular sobre la superficie del linfocito reconoce el complejo formado por el ant&iacute;geno y un p&eacute;ptido del CMH en la superficie de la c&eacute;lula presentadora de ant&iacute;geno (36).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Adem&aacute;s de la asociaci&oacute;n con el locus del HLA-DR, se han identificado otras asociaciones como la del <i>STAT 4 (signal transducer and activator of transcription 4), PTPN 22 (protein tyrosine phosphatase non receptor type 22), ITGAM (integrin alpha M)</i> entre otros (37-40). El <i>STAT 4</i> fue el primer gen en quien se ha reportado una asociaci&oacute;n tanto con el LES como con la Artritis Reumatoide. Esta asociaci&oacute;n ha sido confirmada por numerosos estudios incluyendo un estudio de genoma completo (40).</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Manifestaciones cardiopulmonares en los pacientes con LES</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Manifestaciones Pulmonares</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Como se ha explicado previamente, el LES puede afectar a m&uacute;ltiples &oacute;rganos vitales lo que a su vez act&uacute;a en detrimento de la sobrevida a largo plazo de estos pacientes. En la <a href="#2ar01f1">Figura 1</a> se puede observar como la presencia de manifestaciones cardiovasculares disminuye la supervivencia de los pacientes con LES a largo plazo.</font></p>     <p>&nbsp;</p>     <p align="center"><a name="2ar01f1"></a><img src="/img/revistas/iics/v13n2/2ar01f1.jpg"></p>     <p align="center">&nbsp;</p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Las manifestaciones pleuro-pulmonares incluyen a la pleuritis l&uacute;pica, la neumonitis tanto aguda como cr&oacute;nica, la hemorragia pulmonar, el embolismo pulmonar y la hipertensi&oacute;n pulmonar. Las manifestaciones respiratorias se presentan en cerca de un 25% de los pacientes con LES y pueden ser clasificadas en primarias (debidas a la enfermedad) y en secundarias a otras patolog&iacute;as (32,41)</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">  La afectaci&oacute;n pleural, adem&aacute;s de ser un criterio de clasificaci&oacute;n del LES, es la manifestaci&oacute;n respiratoria m&aacute;s frecuentemente observada(32). Ha sido reportada en el 30-60% de los pacientes con LES (32,42), si bien hasta un 93% ha sido descrito en estudios basados en autopsias. El derrame pleural en el LES se caracteriza por ser bilateral y de peque&ntilde;o volumen. Se presenta cl&iacute;nicamente con dolor pleur&iacute;tico, tos y disnea, si bien en algunos casos pueden ser asintom&aacute;ticos (32,43). El an&aacute;lisis del l&iacute;quido pleural, presenta caracter&iacute;sticas de exudado, que puede ser inicialmente de predominio neutrof&iacute;lico para a los pocos d&iacute;as volverse predominantemente linfoc&iacute;tico (42,43).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">  La neumonitis presenta una menor frecuencia, y se ha descrito en un 0-14% de los pacientes (32). Esta puede tener una presentaci&oacute;n aguda o cr&oacute;nica. La primera se manifiesta generalmente como una reca&iacute;da de la enfermedad multisist&eacute;mica; los pacientes se presentan cl&iacute;nicamente con tos, disnea, dolor tor&aacute;cico, fiebre e inclusive hemoptisis. La importancia de esta complicaci&oacute;n radica en la alta morbimortalidad que conlleva. Se ha descrito que hasta un 50% de los pacientes que la padecen fallece, y el grupo de pacientes que sobrevive presenta cronificaci&oacute;n de la complicaci&oacute;n pulmonar (32).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En relaci&oacute;n a la neumonitis l&uacute;pica de evoluci&oacute;n cr&oacute;nica generalmente se presenta como una enfermedad pulmonar intersticial que se caracteriza por tos no productiva, disnea de esfuerzo, fatiga y rales basales (42). Puede producirse como una complicaci&oacute;n de la neumonitis aguda o puede presentarse de forma independiente a &eacute;sta (43). Los estudios de imagen revelan un infiltrado intersticial, con im&aacute;genes en vidrio deslustrado y la presencia de opacidades reticulares basales (43). Es importante considerar que si bien la mayor&iacute;a de los pacientes no desarrolla una intersticiopat&iacute;a cl&iacute;nicamente evidente, el LES como patolog&iacute;a autoinmune es responsable del 2% de las muertes provocadas por una afectaci&oacute;n pulmonar (44).</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La hemorragia alveolar es una complicaci&oacute;n poco frecuente que implica una gravedad importante ya que se asocia con una elevada mortalidad que var&iacute;a entre el 50-90%. Se presenta caracter&iacute;sticamente con disnea de inicio brusco, tos, fiebre, infiltrados pulmonares con predominio en los l&oacute;bulos inferiores y una ca&iacute;da brusca de la hemoglobina. La hemoptisis es una manifestaci&oacute;n t&iacute;pica de la enfermedad, pero se presenta en el 40-60% de los casos, por lo que un porcentaje no despreciable de los pacientes no la presentar&aacute;. Cl&aacute;sicamente se ha descrito la presencia de anemia, condensaciones pulmonares y hemoptisis en esta complicaci&oacute;n (43).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La hipertensi&oacute;n pulmonar puede ocurrir en el LES debido a la propia enfermedad o como consecuencia de complicaciones como el embolismo pulmonar, la enfermedad valvular cardiaca o la enfermedad pulmonar intersticial. Se ha descrito su presencia en un porcentaje que var&iacute;a entre el 5-14% de los pacientes con LES (45). El desarrollo de esta complicaci&oacute;n se ha asociado frecuentemente a la presencia de anticuerpos anti-fosfol&iacute;pidos, pero es importante recalcar que las complicaciones tromboemb&oacute;licas en el LES pueden estar presentes con o sin estos anticuerpos (45). A modo de resumen en la <a href="#2ar01t1">tabla 1</a> se presentan las principales complicaciones pleuropulmonares descritas en el LES.</font></p>     <p>&nbsp;</p>     <p align="center"><a name="2ar01t1"></a><img src="/img/revistas/iics/v13n2/2ar01t1.jpg"></p>     <p align="center">&nbsp;</p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><b>Manifestaciones Cardiovasculares</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La afectaci&oacute;n cardiovascular es una de las causas m&aacute;s importantes de morbilidad y mortalidad en los pacientes con diagn&oacute;stico de LES. En este sentido se ha descrito que los pacientes con LES presentan un mayor riesgo para padecer un infarto agudo de miocardio y/o un accidente cerebrovascular comparado con el riesgo que presenta la poblaci&oacute;n general (46) (<a href="#2ar01f2">Figura 2</a>). Los pacientes j&oacute;venes con LES tienen un riesgo aumentado a tener un evento cardiovascular con respecto a las personas sanas de la misma edad; y este riesgo aumenta a medida que aumenta la edad. </font></p>     <p>&nbsp;</p>     <p align="center"><a name="2ar01f2"></a><img src="/img/revistas/iics/v13n2/2ar01f2.jpg"></p>     <p align="center">&nbsp;</p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Adem&aacute;s de los factores de riesgo cardiovasculares tradicionales (por ej. la dislipidemia, el tabaquismo, la edad avanzada, la hipertensi&oacute;n arterial el sexo masculino, etc.), se han descrito nuevos factores de riesgo (gen&eacute;ticos, asociados a la inmunidad y asociados con el grado de inflamaci&oacute;n) asociados a la propia enfermedad. Tanto los factores de riesgo cardiovascular tradicionales como los nuevos factores de riesgo, est&aacute;n asociados a un mayor riesgo para desarrollar arteriosclerosis y presentar un evento cardiovascular entre los pacientes con LES (<a href="#2ar01f3">Figura 3</a>).</font></p>     <p>&nbsp;</p>     <p align="center"><a name="2ar01f3"></a><img src="/img/revistas/iics/v13n2/2ar01f3.jpg"></p>     <p align="center">&nbsp;</p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">En un estudio realizado en pacientes con LES, el 53% de &eacute;stos ten&iacute;a m&aacute;s de un factor de riesgo tradicional y de &eacute;stos los m&aacute;s frecuentes eran el sedentarismo (70 %), la obesidad (56%), la dislipidemia (56%) y el antecedente de tabaquismo (56%) (47).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">  El coraz&oacute;n puede estar comprometido cl&iacute;nicamente en el 50% de los pacientes con LES (48-50). Todas las estructuras cardiacas pueden estar afectadas, desde el pericardio, el miocardio, el endocardio, las arterias coronarias hasta el tejido de conducci&oacute;n. Este compromiso puede ser debido al LES o a otra enfermedad sist&eacute;mica como la hipertensi&oacute;n arterial.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">  Aunque algunos estudios de necropsia han demostrado un 40&ndash;70% de miocarditis; la miocarditis sintom&aacute;tica es reportada en solo un 5-10% de los pacientes, sugiriendo que el compromiso subcl&iacute;nico cardiaco es un hallazgo com&uacute;n en el LES (51-53).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">  En relaci&oacute;n a los eventos coronarios, Manzi <i>et al.</i> (50) han reportado que los eventos coronarios fueron 50 veces m&aacute;s frecuentes en los pacientes con LES en el rango etario de 35&ndash;44 a&ntilde;os en relaci&oacute;n a la poblaci&oacute;n sana de la cohorte de Framingham (50). En la cohorte de LES del hospital John Hopkins el riesgo de desarrollar un evento cardiovascular fue de 2,6 veces mayor que para la poblaci&oacute;n de Framingham incluso despu&eacute;s de controlar los factores de riesgo para enfermedad cardiovascular tradicionales en este grupo (51).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">  El s&iacute;ndrome antifosfolip&iacute;dico est&aacute; caracterizado por un riesgo incrementado para accidentes cerebrovasculares e infartos de miocardio y por lo tanto, varios estudios han intentado determinar si la presencia de anticuerpos antifosfolip&iacute;dicos puede ser un factor de riesgo independiente para enfermedad cardiovascular. Se ha observado que la presencia de anticuerpos antifosfolip&iacute;dicos estuvo significativamente asociada con un incremento del riesgo de 4 veces de tener un evento cardiovascular en un promedio de tiempo de aproximadamente 6 a&ntilde;os (54-57).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">  Adicionalmente, se ha observado que existe una asociaci&oacute;n entre el s&iacute;ndrome nefr&oacute;tico y una prevalencia aumentada de arteriosclerosis no sintom&aacute;tica en pacientes l&uacute;picos diagnosticados antes de los 16 a&ntilde;os; y que los niveles aumentados de creatinina se asociaron a un mayor riesgo de padecer coronariopat&iacute;a (58,59).</font></p>     ]]></body>
<body><![CDATA[<p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">  <b>Mortalidad en el LES</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">  El rango de sobrevida de los pacientes con LES se ha incrementado notablemente en las ultimas 5 d&eacute;cadas, pasando de menos del 50% a los 5 a&ntilde;os en 1955 al 85% a los 10 a&ntilde;os (2). Esta mejor&iacute;a en la supervivencia de los pacientes con LES es el resultado del aumento de la sobrevida global de la poblaci&oacute;n en general, los avances en las modalidades terap&eacute;uticas, el uso m&aacute;s juicioso de las terapias existentes, y a un cambio en los factores de riesgo de mortalidad. A pesar del alentador progreso, se ha descrito que los pacientes diagnosticados con LES y seguidos en varios centros de EEUU tienen el riesgo de mortalidad 2,4 veces mayor que el de la poblaci&oacute;n general. Este incremento en la mortalidad es el resultado de las infecciones, las enfermedades cardiopulmonares y el da&ntilde;o irreversible de los &oacute;rganos blanco (2).</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Los eventos cardiovasculares son una complicaci&oacute;n bien conocida del LES. En 1972, Urowitz <i>et al.</i> (1) describieron un patr&oacute;n de mortalidad con dos picos de incidencia en los pacientes con LES. El primer pico se presentar&iacute;a durante los tres primeros a&ntilde;os posteriores al diagn&oacute;stico de la enfermedad. Las principales causas de muerte ser&iacute;an secundarias a la actividad del LES, a las infecciones, la afectaci&oacute;n renal y las altas dosis de corticoides administrados durante las primeras fases de la enfermedad. El segundo pico se presentar&iacute;a de forma m&aacute;s tard&iacute;a, entre los 4 y los 20 a&ntilde;os posteriores al diagn&oacute;stico. La principal causa de mortalidad tard&iacute;a estar&iacute;a relacionada principalmente con los eventos cardiovasculares. Desde entonces se ha despertado un inter&eacute;s creciente tanto en la epidemiolog&iacute;a como la fisiopatolog&iacute;a de la enfermedad cardiovascular entre los pacientes con LES.</font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Aunque la mortalidad de los pacientes con LES ha mejorado en los &uacute;ltimos 30 a&ntilde;os gracias a los avances en el tratamiento y a una mejor comprensi&oacute;n de los mecanismos patol&oacute;gicos, se ha objetivado que la mortalidad debido a la enfermedad cardiovascular aumenta (3,4,60). Los mecanismos subyacentes asociados a una aterosclerosis acelerada en el LES son complejos y son &aacute;reas de investigaci&oacute;n exhaustiva en los &uacute;ltimos a&ntilde;os. Aunque los riesgos tradicionales como la dislipidemia y el tabaquismo han sido demostrados como factores predictores de riesgo cardiovascular en pacientes con LES, el LES por s&iacute; mismo es un factor de riesgo independiente para enfermedad cardiovascular (<a href="#2ar01f4">Figura 4</a>) (3,61-64).</font></p>     <p>&nbsp;</p>     <p align="center"><a name="2ar01f4"></a><img src="/img/revistas/iics/v13n2/2ar01f4.jpg"></p>     <p align="center">&nbsp;</p>     <p><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><b>CONCLUSI&Oacute;N</b></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La evidencia cient&iacute;fica indica que existe un claro y significativo aumento de eventos cardiopulmonares en los pacientes con LES. Los eventos cardiovasculares m&aacute;s frecuentes son la hipertensi&oacute;n arterial, seguida de los accidentes cerebrovasculares y el infarto agudo de miocardio. El conocimiento adecuado de las complicaciones cardiopulmonares que aumentan considerablemente la mortalidad en el LES nos permitir&aacute; actuar m&aacute;s r&aacute;pidamente y mejorar nuestro manejo terap&eacute;utico individualizado en etapas incipientes de esta enfermedad inmunol&oacute;gica.</font></p>     <p>&nbsp;</p>     ]]></body>
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