<?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>0120-8748</journal-id>
<journal-title><![CDATA[Acta Neurológica Colombiana]]></journal-title>
<abbrev-journal-title><![CDATA[Acta Neurol Colomb.]]></abbrev-journal-title>
<issn>0120-8748</issn>
<publisher>
<publisher-name><![CDATA[Asociación Colombiana de Neurología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-87482015000100017</article-id>
<article-id pub-id-type="doi">10.22379/2422402217</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Introducción a la historia de la esclerosis múltiple]]></article-title>
<article-title xml:lang="en"><![CDATA[Introduction to the history of multiple sclerosis]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Covo Torres]]></surname>
<given-names><![CDATA[Pedro]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad del Sinú  ]]></institution>
<addr-line><![CDATA[Cartagena ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>01</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>01</month>
<year>2015</year>
</pub-date>
<volume>31</volume>
<numero>1</numero>
<fpage>119</fpage>
<lpage>124</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-87482015000100017&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-87482015000100017&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-87482015000100017&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[La esclerosis múltiple (EM) fue descrita inicialmente en un documento escandinavo y dos siglos más tarde en el diario de una santa holandesa. Mucho después, comenzando el siglo XVIII, se reportó un caso aislado y no es sino hasta el siglo XIX cuando la enfermedad se presenta con mayor frecuencia. En la primera mitad de este siglo se referenció un paciente en la literatura médica y se divulgaron dos atlas de patología. A partir de entonces, a lo largo de la segunda mitad del siglo XIX, se desarrolló la concepción moderna de la EM, partiendo de los relatos de Frerichs, en Alemania, y más tarde de Charcot, a la cabeza de la Pitié-Salpêtrière. Pero es durante el siglo pasado que la EM alcanzó su madurez con el surgimiento de los criterios diagnósticos, el concepto de la remielinización, la neuroimagen y el tratamiento farmacológico. En el siglo XXI, a partir del avance tecnológico ydel mejor conocimiento de la enfermedad, se proponen nuevos criterios diagnósticos y se utilizan alternativas terapéuticas orales y anticuerpos monoclonales. En este siglo representan un gran desafío los adelantos en genética, biomarcadores y medicamentos de mayor eficacia.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Multiple Sclerosis (MS) was initially described in a Scandinavian document and two centuries later in the diary of a Dutch Saint. Long after, at the beginning of the eighteenth century, an isolated case was reported and it was not until the nineteenth century that cases were most frequently reported. During the first half of this century a patient was referenced, for the first time, in the medical literature and two atlas of pathology reported the disease. Thereafter, during the second half of the nineteenth century, the modern conception of MS is developed, based on the stories of Frerichs, in Germany, and later Charcot's, head of the Pitié-Salpêtrière. However, it was during the past century that MS reached maturity with the emergence of the diagnostic criteria, the concept of remyelination, neuroimage and pharmacological treatment. In the XXI century, based on technological advancement and a better understanding of the disease, new diagnostic criteria are proposed as well as alternative therapies and oral monoclonal antibodies. In this century, advances in genetics represent a great challenge, as well as biomarkers and more medications of a wider effectiveness.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Esclerosis Múltiple]]></kwd>
<kwd lng="es"><![CDATA[Ollivier d'Angers]]></kwd>
<kwd lng="es"><![CDATA[Frerichs]]></kwd>
<kwd lng="es"><![CDATA[Charcot]]></kwd>
<kwd lng="es"><![CDATA[Poser]]></kwd>
<kwd lng="es"><![CDATA[MacDonald]]></kwd>
<kwd lng="en"><![CDATA[Multiple Sclerosis]]></kwd>
<kwd lng="en"><![CDATA[Ollivier d'Angers]]></kwd>
<kwd lng="en"><![CDATA[Frerichs]]></kwd>
<kwd lng="en"><![CDATA[Charcot]]></kwd>
<kwd lng="en"><![CDATA[Poser]]></kwd>
<kwd lng="en"><![CDATA[MacDonald]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  <font face="verdana" size="2">       <p><b>Comunicaci&oacute;n especial en neurolog&iacute;a</b></p>      <p>Comunicaci&oacute;n breve</p>      <p align="center"><font size="4"><b>Introducci&oacute;n a la historia de la esclerosis m&uacute;ltiple</b></font></p>     <p align="center"><font size="3"><b>Introduction to the history of multiple sclerosis</b></font></p>      <p align="center">Pedro Covo Torres (1)</p>      <p>(1) Neur&oacute;logo Cl&iacute;nico. Coordinador del Posgrado de Neurolog&iacute;a Cl&iacute;nica. Universidad del Sin&uacute; - Cartagena, Colombia.</p>      <p>Recibido: 21/01/15. Aceptado: 22/01/15.     <br> Correspondencia: Pedro Covo: <a href="mailto:pcovot@hotmail.com">pcovot@hotmail.com</a></p>  <hr>     <p><font size="3"><B>Resumen</b></font></p>      ]]></body>
<body><![CDATA[<p>La esclerosis m&uacute;ltiple (EM) fue descrita inicialmente en un documento escandinavo y dos siglos m&aacute;s tarde en el diario de una santa holandesa. Mucho despu&eacute;s, comenzando el siglo XVIII, se report&oacute; un caso aislado y no es sino hasta el siglo XIX cuando la enfermedad se presenta con mayor frecuencia. En la primera mitad de este siglo se referenci&oacute; un paciente en la literatura m&eacute;dica y se divulgaron dos atlas de patolog&iacute;a. A partir de entonces, a lo largo de la segunda mitad del siglo XIX, se desarroll&oacute; la concepci&oacute;n moderna de la EM, partiendo de los relatos de Frerichs, en Alemania, y m&aacute;s tarde de Charcot, a la cabeza de la Piti&eacute;-Salp&ecirc;tri&egrave;re. Pero es durante el siglo pasado que la EM alcanz&oacute; su madurez con el surgimiento de los criterios diagn&oacute;sticos, el concepto de la remielinizaci&oacute;n, la neuroimagen y el tratamiento farmacol&oacute;gico. En el siglo XXI, a partir del avance tecnol&oacute;gico ydel mejor conocimiento de la enfermedad, se proponen nuevos criterios diagn&oacute;sticos y se utilizan alternativas terap&eacute;uticas orales y anticuerpos monoclonales. En este siglo representan un gran desaf&iacute;o los adelantos en gen&eacute;tica, biomarcadores y medicamentos de mayor eficacia.</p>      <p><b>Palabra clave:</b> Esclerosis M&uacute;ltiple, Ollivier d&rsquo;Angers, Frerichs, Charcot, Poser, MacDonald (DeCS).</p>  <hr>     <p><font size="3"><B>Summary</b></font></p>      <p>Multiple Sclerosis (MS) was initially described in a Scandinavian document and two centuries later in the diary of a Dutch Saint. Long after, at the beginning of the eighteenth century, an isolated case was reported and it was not until the nineteenth century that cases were most frequently reported. During the first half of this century a patient was referenced, for the first time, in the medical literature and two atlas of pathology reported the disease. Thereafter, during the second half of the nineteenth century, the modern conception of MS is developed, based on the stories of Frerichs, in Germany, and later Charcot&rsquo;s, head of the Piti&eacute;-Salp&ecirc;tri&egrave;re. However, it was during the past century that MS reached maturity with the emergence of the diagnostic criteria, the concept of remyelination, neuroimage and pharmacological treatment. In the XXI century, based on technological advancement and a better understanding of the disease, new diagnostic criteria are proposed as well as alternative therapies and oral monoclonal antibodies. In this century, advances in genetics represent a great challenge, as well as biomarkers and more medications of a wider effectiveness.</p>      <p><b>Key words:</b> Multiple Sclerosis, Ollivier d&rsquo;Angers, Frerichs, Charcot, Poser, MacDonald (MeSH).</p>  <hr>     <p>Primeros relatos. La m&aacute;s antigua descripci&oacute;n de una probable Esclerosis M&uacute;ltiple (EM) se encuentra en &ldquo;Isla Saga&rdquo;, de San Torlakr (1133-1193), santo patrono de Islandia, donde se menciona la ceguera y los disturbios del lenguaje de Hala, una mujer vikinga que se habr&iacute;a recuperado despu&eacute;s de algunos d&iacute;as de oraci&oacute;n y sacrificios (1). Hay razones para creer que la EM aparece en individuos escandinavos antes del siglo XI y que fue diseminada por los vikingos en Europa (2). El primer diario conocido de un posible caso de EM es el de Santa Lidwina de Scheidam, una monja holandesa del siglo XIV (1380-1433), quien estamp&oacute; los s&iacute;ntomas que padeci&oacute; desde el comienzo de la enfermedad, a los 16 a&ntilde;os, hasta su muerte a los 53 a&ntilde;os de edad. Sus trastornos entra&ntilde;aban dificultad en la marcha, dolores lancinantes, debilidad en brazo derecho, ceguera, disturbios sensitivos y disfagia. Su sufrimiento est&aacute; bien documentado por la iglesia y fue fundamental para consagrar su santidad (3).</p>      <p>Las dos Margaret, Auguste, el poeta Heine y Alan Stevenson. Richard Gough, en &ldquo;Antiquityes and Memoyres of the Parish of Myddles, County of Salop&rdquo; (1700), relat&oacute; el caso de Margaret Davies, quien present&oacute; cojera asociada al embarazo y d&eacute;ficit progresivo durante un per&iacute;odo de 30 a&ntilde;os. Fue examinada y tratada por m&eacute;dicos, cirujanos y boticarios (4). Augusto Frederick d&rsquo;Este (1749-1848), nieto ileg&iacute;timo de Jorge III, rey de la Gran Breta&ntilde;a, narr&oacute; su enfermedad en un diario que escribi&oacute; rigurosamente durante 26 a&ntilde;os. Cuenta c&oacute;mo inici&oacute; en 1822 con p&eacute;rdida de visi&oacute;n mientras asist&iacute;a al funeral de un amigo. Se recuper&oacute; a los diez meses y m&aacute;s tarde manifest&oacute; nuevos s&iacute;ntomas como paraparesia con episodios de reca&iacute;da-remisi&oacute;n y empeoramiento gradual. Numerosos m&eacute;dicos brit&aacute;nicos tuvieron conocimiento de su enfermedad, entre ellos el legendario Sir Astley Cooper, Sir Benjam&iacute;n Brodie y Sir Richard Bright. Entre las alternativas terap&eacute;uticas recomendadas podemos mencionar agua mineral, ba&ntilde;os con sulfato de zinc, valeriana, diversos tipos de hierbas y flores, estricnina, quinina, nitrato de plata, hidroterapia, estimulaci&oacute;n el&eacute;ctrica, sangr&iacute;as, masajes y equinoterapia. Sin embargo, d&rsquo;Este refiere que s&oacute;lo obtuvo alg&uacute;n alivio cuando viaj&oacute; por Escocia y fue &ldquo;abrazado y vigorizado por el aire de la tierra alta&rdquo; (5). El poeta alem&aacute;n de origen jud&iacute;o, Heinrich Heine (1797-1856), present&oacute; un cuadro cl&iacute;nico caracterizado por un d&eacute;ficit progresivo y deterioro visual; sin embargo, la presencia de ptosis, hallazgo poco com&uacute;n en la EM, despierta dudas sobre su verdadero diagn&oacute;stico (6). Alan Stevenson (1807-1865), t&iacute;o del escritor brit&aacute;nico Robert Louis Stevenson, fue un sobresaliente arquitecto, constructor y supervisor de faros, poeta, pol&iacute;glota y pionero de la tecnolog&iacute;a &oacute;ptica. Padeci&oacute; un trastorno neurol&oacute;gico progresivo que inici&oacute; cuando era muy joven y que lo confinaba al lecho; en sus cartas refleja gran sufrimiento, refiere dolores reum&aacute;ticos, fatiga, lumbalgia y paraplegia recurrente. Su bi&oacute;grafo Bella Barthurst considera que sufr&iacute;a de EM (7). La novelista victoriana y naturalista Margaret Gatty (1809-1873) comenz&oacute; a presentar una enfermedad neurol&oacute;gica a los 41 a&ntilde;os de edad, su m&eacute;dico -Thomas King Chamber- public&oacute; el caso en la revista m&eacute;dica Lancet (1864) como atrofia muscular e incluso atribuy&oacute; la causa a que ella utilizaba las herramientas del jard&iacute;n de manera masculina (8). Surgieron nuevos s&iacute;ntomas, as&iacute; que en 1868 consult&oacute; al Dr. Radcliffe, quien sostuvo que padec&iacute;a una alteraci&oacute;n de la m&eacute;dula espinal, opini&oacute;n rechazada por Chamber y otros galenos que intentaron ridiculizarlo por lo que ellos cre&iacute;an era un desatino (9).</p>      <p>La EM aparece en la literatura m&eacute;dica. Charles Prosper Ollivier d&rsquo;Angers (1796-1845) revel&oacute; el primer caso cient&iacute;fico (1824) en el libro &ldquo;Maladies de la Moelle Epini&eacute;re&rdquo; (10). El pionero de las descripciones patol&oacute;gicas fue Sir Robert Carswell, quien en 1838 mencion&oacute; &aacute;reas descoloridas en la protuberancia y m&eacute;dula espinal (&ldquo;hard, semitransparent and atrophied areas&rdquo;). Carswell naci&oacute; en Escocia (1793) y muri&oacute; en Londres (1857). Estudi&oacute; y trabaj&oacute; como pat&oacute;logo en hospitales de Paris y Lyon; fue un excelente artista, tanto que dibuj&oacute; un atlas patol&oacute;gico sobre EM (&ldquo;Pathological Anatomy: Illustrations of the Elementary Form of Disease&rdquo;) publicado en 12 fasc&iacute;culos (11). Simult&aacute;neamente, en los mismos hospitales, el pat&oacute;logo franc&eacute;s Jean Cruveilhier (1791-1874) produjo otro atlas de patolog&iacute;a que, a diferencia del publicado por Carswell, incorporaba aspectos cl&iacute;nicos, uno de los cuales denomin&oacute; &ldquo;Parapl&eacute;gie par d&eacute;g&eacute;n&eacute;rescence grise des cordons de la moelle&rdquo; (12). Divulg&oacute; la &ldquo;Correlaci&oacute;n cl&iacute;nico-patol&oacute;gica de la Esclerosis M&uacute;ltiple&rdquo; en los fasc&iacute;culos de Patolog&iacute;a de la Facultad de Medicina de Paris (1835-1842).</p>      <p>Friedrich Theodor von Frerichs (1819-1885). Pat&oacute;logo alem&aacute;n que revel&oacute;, de manera clara, las caracter&iacute;sticas cl&iacute;nicas y patol&oacute;gicas de la EM. Dio a conocer el variado curso de la enfermedad con exacerbaciones, episodios de reca&iacute;da-remisi&oacute;n y posterior cuadro progresivo. Entre los principales s&iacute;ntomas destac&oacute; el nistagmo, el predominio motor y los trastornos mentales, reconociendo originalmente estas complicaciones. Tambi&eacute;n estableci&oacute; que la enfermedad era m&aacute;s frecuente en j&oacute;venes y que el compromiso era asim&eacute;trico al comienzo. En 1849, 19 a&ntilde;os antes de Charcot, sugiri&oacute; llamar a esta patolog&iacute;a &ldquo;Hernkleroses&rdquo; (13). Frerichs es para muchos el padre de la concepci&oacute;n moderna de la EM pero en su momento no ten&iacute;a la credibilidad ni el apoyo que m&aacute;s tarde tendr&iacute;a Charcot, uno de los pioneros de la neurolog&iacute;a moderna en Europa. Algunos cr&iacute;ticos de la &eacute;poca, entre ellos el todo poderoso &ldquo;C&eacute;sar de la Salp&ecirc;tri&egrave;re&rdquo; (Charcot), sosten&iacute;an que hab&iacute;a pacientes mal diagnosticados entre los informados por Frerichs; sin embargo, George Theodor Valentine, alumno de &eacute;ste, comprob&oacute; mediante autopsia el correcto diagn&oacute;stico de su maestro en publicaci&oacute;n de la revista &ldquo;Deutsche Klin&rdquo; en 1856 (14).</p>      <p>Escuela alemana y austr&iacute;aca. A mediados del siglo XIX los pat&oacute;logos de Viena y Alemania superaban a los franceses gracias al uso del microscopio y otros ex&aacute;menes de laboratorio. Algunos profesores de la Piti&eacute;-Salp&ecirc;tri&egrave;re menospreciaban estos m&eacute;todos, no as&iacute; Charcot y Vulpian, quienes asimilaron estas nuevas t&eacute;cnicas y contribuyeron as&iacute; al desarrollo de la medicina gala. Ludwig T&uuml;rck (1810-1868), neur&oacute;logo austr&iacute;aco y jefe de un departamento de neurolog&iacute;a en Viena, contribuy&oacute; en la construcci&oacute;n del conocimiento sobre la degeneraci&oacute;n de la m&eacute;dula espinal. Detall&oacute; el s&iacute;ndrome hoy reconocido como de Brown-Sequard, caracterizado por hemisecci&oacute;n medular (15). Carl Rokitansky (1804-1878) utiliz&oacute; t&eacute;cnicas avanzadas en el microscopio y cre&oacute; en Viena un importante centro de disecci&oacute;n y anatom&iacute;a patol&oacute;gica. En 1846 describi&oacute; los corp&uacute;sculos grasosos en las lesiones producidas por EM (16). Eduard von Rindfleisch (1836-1908), pat&oacute;logo alem&aacute;n, hizo observaciones fundamentales sobre los cambios inflamatorios y la participaci&oacute;n de los vasos sangu&iacute;neos en este proceso. Sostuvo que la inflamaci&oacute;n primaria era la causa de la desmielinizaci&oacute;n, analiz&oacute; muestras post-mortem en cerebro de numerosos pacientes con EM y, en 1863, difundi&oacute; la teor&iacute;a del compromiso inflamatorio en su etiolog&iacute;a (17). El m&eacute;dico jud&iacute;o alem&aacute;n, Moritz Heinrich Romberg (1795-1873), uno de los padres de la neurolog&iacute;a moderna propal&oacute;, de 1840-46, el texto sistem&aacute;tico de neurolog&iacute;a &ldquo;Lehrbuch der Nervenkrankheiten&rdquo; (18). Por otra parte, el fisi&oacute;logo brit&aacute;nico Marshall Hall (1790-1857) particip&oacute; en los estudios de la EM; sus principales ensayos versaron sobre la funci&oacute;n refleja del bulbo y de la m&eacute;dula espinal (19).</p>      ]]></body>
<body><![CDATA[<p>La EM atraviesa el oc&eacute;ano. El primer enfermo fuera de Europa fue presentado el 4 de diciembre de 1867 en el &ldquo;College of Physician&rdquo; de Filadelfia por J.C. Morris y Silas Weir Mitchell (1829-1914), este &uacute;ltimo considerado el padre de la neurolog&iacute;a norteamericana. El enfermo se trataba de un m&eacute;dico -Dr. Pennock- con paraplej&iacute;a progresiva y disturbios vesicales que empeoraban con el calor. La patolog&iacute;a comprob&oacute; &ldquo;manchas irregulares translucidas&rdquo; en la m&eacute;dula a nivel cervical y dorsal. Al microscopio se observaron fibras degeneradas y gl&oacute;bulos de grasa (20).</p>      <p>La contribuci&oacute;n de la Piti&eacute;-Salp&ecirc;tri&egrave;re. El edificio fue construido por Luis XIII durante el siglo XVI para fabricar armas y almacenar p&oacute;lvora; m&aacute;s tarde se convertir&iacute;a en un hospital de caridad. Tradicionalmente se ha atribuido la concepci&oacute;n moderna de la EM al neur&oacute;logo franc&eacute;s Jean Martin Charcot (1825-1893), quien asimil&oacute; investigaciones y conceptos previos que, sumados a sus pesquisas, le permitieron reconocer esta enfermedad como una entidad &uacute;nica. Detall&oacute; los hallazgos cl&iacute;nicos y patol&oacute;gicos, enfatiz&oacute; el concepto de desmielinizaci&oacute;n, determin&oacute; la forma de reca&iacute;da-remisi&oacute;n y expres&oacute; que la fibra desmielinizada es capaz de tener conducci&oacute;n nerviosa. La reconoci&oacute; como una enfermedad en 1868 y la denomin&oacute; Esclerosis en Placas. Estableci&oacute; tres s&iacute;ntomas cl&iacute;nicos caracter&iacute;sticos de la EM (tr&iacute;ada de Charcot): disartria, ataxia y temblor Tambi&eacute;n la presencia de s&iacute;ntomas at&iacute;picos como amiotrofias (21). Sus alumnos Bourneville &amp; Gu&eacute;rard publicaron, en 1869, una obra que conten&iacute;a todo el conocimiento del momento sobre esta enfermedad (22). Aunque hoy se considera la concepci&oacute;n de Charcot como el punto de partida de la visi&oacute;n moderna de la EM, &eacute;l mismo reconoci&oacute; la contribuci&oacute;n de otros investigadores en quienes se apoy&oacute;, entre ellos Ludwig T&uuml;rck, Ernst Leyden, Von Frerichs, Albert von Zenker, Carl Frommann (23). Este &uacute;ltimo public&oacute; un libro ilustrado con cortes de la m&eacute;dula (1864) y Ernst Leyden present&oacute; en la revista &ldquo;Deutsche Klin&rdquo; (1863) 34 casos de EM que design&oacute; mielitis cr&oacute;nica. Estableci&oacute; que era m&aacute;s frecuentes en mujeres (2:1) y sugiri&oacute; una predisposici&oacute;n gen&eacute;tica (24). La importancia de la neurolog&iacute;a francesa, sobre todo durante la segunda mitad del siglo XIX, fue sin duda un factor fundamental para que los conceptos de Charcot se difundieran y fueran aceptados a nivel mundial. M&eacute;dicos de otros pa&iacute;ses europeos y de Am&eacute;rica acostumbraban a entrenarse en Paris, en la Piti&eacute;-Salp&ecirc;tri&egrave;re, templo de la neurolog&iacute;a (25). Edm&eacute; Felix Alfred Vulpian (1826-1887) present&oacute; tres casos ante la Societ&eacute; Medicale des Hospitaux y utiliz&oacute; el t&eacute;rmino &ldquo;Esclerosis en placas diseminadas&rdquo; (1866). Vulpian y Charcot investigaron juntos en la Salp&ecirc;tri&egrave;re, m&aacute;s tarde Vulpian dirigi&oacute; sus intereses a otros campos mientras que Charcot se concentr&oacute; en la neurolog&iacute;a y encabez&oacute; una pl&eacute;yade de cient&iacute;ficos que hacen parte de la historia de las neurociencias (26).</p>      <p>Contin&uacute;a la escuela. Pierre Marie (1853-1940) fue el sucesor de Charcot en el Hospital Piti&eacute;-Salp&ecirc;tri&egrave;re de Paris. Prosigui&oacute; las investigaciones que permitieron revelar nuevos aspectos de la EM. Durante ese per&iacute;odo, la patolog&iacute;a y los s&iacute;ntomas de la EM se conoc&iacute;an bien, pero se desconoc&iacute;a su causa, que a&uacute;n no se ha descubierto. Los hallazgos de Louis Pasteur (1822-1895) dieron nuevas luces y apoyado en ellas Pierre Marie sugiri&oacute;, en 1884, que la EM podr&iacute;a ser producida por un agente infeccioso. Esta hip&oacute;tesis, todav&iacute;a en el siglo XXI, goza de alguna aceptaci&oacute;n (27).</p>      <p>Testimonio dram&aacute;tico. WNP Barbellion (1889-1919) es el pseud&oacute;nimo que utilizaba Bruce Fredrick Cummings, famoso zo&oacute;logo afectado de EM, quien plasm&oacute; su dolencia en un diario publicado el a&ntilde;o de su muerte con el t&iacute;tulo &ldquo;The Journal of a Disappointed Man&rdquo;. Se trata de un relato desgarrador del sufrimiento de una persona que document&oacute; esta enfermedad desde su comienzo, a los 18 a&ntilde;os, hasta su muerte, todav&iacute;a muy joven a los 30 a&ntilde;os de edad. Es considerado uno de los m&aacute;s impactantes diarios de la humanidad; su hermano expres&oacute; que &ldquo;never was a half-dead more alive&rdquo; (28).</p>      <p>Finales del siglo XIX y la primera mitad del siglo XX. Eug&egrave;ne Devic (1858-1930), junto a su disc&iacute;pulo Fernan Gault, describi&oacute; en 1894 una condici&oacute;n nerviosa que afectaba la m&eacute;dula espinal y el nervio &oacute;ptico, hoy conocida como Enfermedad de Devic o neuromielitis &oacute;ptica (29, 30). El signo de Lhermitte en la EM fue descrito y publicado por Lhermitte, Bollack &amp; Nicolas y presentado en la Sociedad Neurol&oacute;gica de Par&iacute;s el 3 de julio de 1924 (31). El rumano Israel Wechsler (1886-1962), jefe del servicio de neurolog&iacute;a del Mount Sinai Hospital de Nueva York, escribi&oacute; un texto de neurolog&iacute;a en 1927, que tuvo varias ediciones, donde precisa el cuadro cl&iacute;nico, el diagn&oacute;stico diferencial y el tratamiento de la EM. El texto recomienda para su tratamiento el uso de hierro, estricnina, ars&eacute;nico, quinina y salvars&aacute;n (32). El Dr. Russell Brain (1895-1966) emerge al principio del siglo XX como una de las grandes figuras en la comprensi&oacute;n de la EM. Public&oacute; la obra &ldquo;Disseminating Sclerosis&rdquo; en 1930 y tres a&ntilde;os despu&eacute;s el texto &ldquo;Diseases of the Nervous System&rdquo;, que contiene un cap&iacute;tulo sobre esta patolog&iacute;a. Ofreci&oacute; datos estad&iacute;sticos sobre el curso de la enfermedad, por lo que se afirma que con &eacute;l nace el enfoque del tratamiento actual; sus libros sirvieron de gu&iacute;a en muchas facultades de medicina, y &eacute;l mismo revis&oacute; las nuevas ediciones hasta su muerte (33). En la d&eacute;cada de 1930 se desarroll&oacute; la encefalomielitis experimental al&eacute;rgica como modelo de la enfermedad, punto de partida de la investigaci&oacute;n y mejor conocimiento de la EM (34). Los hallazgos anormales en el LCR de pacientes con EM fueron reportados inicialmente por Hinton en 1922, y Charles Poser los incluir&iacute;a en sus famosos criterios para el diagn&oacute;stico de EM (35). En la d&eacute;cada de 1940 el Dr. Elvin Rabat (1914-2000), de la Universidad de Columbia, utiliz&oacute; la reci&eacute;n desarrollada t&eacute;cnica de electroforesis para el diagn&oacute;stico de EM y descubri&oacute; que el LCR presentaba elevaci&oacute;n de las gammaglobulinas, revelado su componente inmunol&oacute;gico (36).</p>      <p>Segunda mitad del siglo XX. En &eacute;sta &eacute;poca se multiplicaron los centros de investigaci&oacute;n sobre EM. Sydney Allinson &amp; Harold Millard fueron pioneros en establecer &ldquo;Criterios cl&iacute;nicos para el diagn&oacute;stico de Esclerosis M&uacute;ltiple&rdquo; en 1954. Diferenciaron tres formas: esclerosis diseminada temprana, esclerosis diseminada probable y esclerosis diseminada posible (37). El concepto de &ldquo;remielinizaci&oacute;n&rdquo; y regeneraci&oacute;n de oligodendrocitos se revel&oacute; a mediados de la d&eacute;cada de 1960; tuvo gran repercusi&oacute;n en la terapia de la EM, ya que entonces se pensaba que los oligodendrocitos y las neuronas eran incapaces de regenerarse (38). George Schumacher et al., de la Universidad de Vermont, establecieron en 1965 criterios b&aacute;sicos tan acertados que todav&iacute;a hoy tienen validez. Consideraban fundamentales para el diagn&oacute;stico cl&iacute;nico de la EM seis caracter&iacute;sticas: anormalidad objetiva en el examen neurol&oacute;gico, evidencia de dos o m&aacute;s lesiones separadas en el sistema nervioso, afecci&oacute;n de la sustancia blanca, compromiso del neuroeje, comienzo entre los 10 y los 50 a&ntilde;os, signos y s&iacute;ntomas que no se explican mejor por otra causa (39). El tratamiento de la EM con ACTH comenz&oacute; con Miller et al., en 1961 (40), no obstante el trabajo inicial a doble ciego lo dirigieron Rose et al., en 1970 con tan buena respuesta que su uso persiste a&uacute;n (41). Los criterios de Douglas McAlpine et al., en 1972, dividieron en tres grupos la EM: esclerosis m&uacute;ltiple probable latente, esclerosis m&uacute;ltiple probable, esclerosis m&uacute;ltiple posible (42). John Prineas (New Jersey, EEUU) utiliz&oacute; t&eacute;cnicas de microscopio electr&oacute;nico para examinar lesiones histol&oacute;gicas en la EM. Confirmo, en 1978, que tanto las c&eacute;lulas microgliales como los macr&oacute;fagos participan en la destrucci&oacute;n de la mielina. Sus trabajos evidenciaron que el proceso de remielinizaci&oacute;n es extenso al comienzo de la EM pero despu&eacute;s decae (43). Todav&iacute;a nos preguntamos: &iquest;por qu&eacute; se detiene la remielinizaci&oacute;n en la EM?, &iquest;qu&eacute; factores intervienen en este fen&oacute;meno? Charles Poser et al. publicaron en 1983 los m&aacute;s reconocidos criterios para el diagn&oacute;stico de EM, fundamentales para investigadores en todo el mundo. Establecieron un lenguaje com&uacute;n y facilitaron la publicaci&oacute;n de art&iacute;culos. Dividieron el diagn&oacute;stico de EM en dos categor&iacute;as apoyadas en el cuadro cl&iacute;nico y/o en el resultado del laboratorio: EM definitiva y EM probable. A partir de entonces, 85% de la investigaci&oacute;n sobre EM se basaron en los criterios de Poser (44). Los modernos m&eacute;todos de neuroimagen revolucionaron la EM, sobre todo la RMN, examen diagn&oacute;stico por excelencia a partir de la publicaci&oacute;n en 1981 de Ian R. Young, &ldquo;Nuclear magnetic resonance imaging of the brain in Multiple Sclerosis&rdquo; (45). Un lustro m&aacute;s tarde, en 1986, Robert I. Grossman descubri&oacute; que el gadolinium-DPTA facilitaba la captaci&oacute;n de las lesiones desmielinizantes y permit&iacute;a identificar las lesiones nuevas y activas (46). A partir de entonces varios autores establecieron criterios diagn&oacute;sticos de EM apoyados en la RMN: 1988 Fazekas, 1988 Paty, 1991 Goodkin, 1997 Barkof, 2000 Tintor&eacute; (47-51). Preston y cols., en 1992, identificaron un miembro de las acuaporinas, estructuras que permiten el paso de agua a trav&eacute;s de determinadas membranas y que participan en la difusi&oacute;n plasm&aacute;tica (52). El tratamiento inmunosupresivo con ciclofosfamida, ciclosporina y plasmaf&eacute;resis se relata desde la d&eacute;cada de 1980; m&aacute;s adelante, en la siguiente d&eacute;cada, aparecen ensayos sobre metrotexate, azatioprina, cladribine, mitoxantrona, inmunoglobulina intravenosa y sulfasalazina (53). Los estudios preliminares sobre interferones en la EM se llevaron a cabo en 1993 (&ldquo;IFNB Multiple Sclerosis Study Group&rdquo;), en esa misma d&eacute;cada se publicaron los informes del &ldquo;Intramuscular interferon beta-1a therapy initiated during a first demyelinating event in Multiple Sclerosis&rdquo; en 1996 y la aplicaci&oacute;n subcut&aacute;nea de interferon beta-1a del Grupo de Estudio PRISM por Jacobs et al., 1998. Esta publicaci&oacute;n establece un tratamiento modificador en la forma reca&iacute;da-remisi&oacute;n (54, 55, 56). La demostraci&oacute;n de la existencia de bandas oligoclonales en el LCR de afectados con EM, alteraci&oacute;n inmunol&oacute;gica frecuente y dato de gran utilidad diagn&oacute;stica, apareci&oacute; en Acta Neurol&oacute;gica de Escandinavia en 1998 (57).</p>      <p>Siglo XXI. El profesor Ian MacDonald (1933-2006) lider&oacute; el grupo de expertos que promulg&oacute; los criterios propuestos en Londres en 2001 (58). Estos tienen en cuenta el cuadro cl&iacute;nico manifestado como brotes, la diseminaci&oacute;n de la lesiones de la RMN con gadolinio en tiempo y espacio, y adem&aacute;s incluye las anormalidades del LCR. En 2004 Lennon y cols. demostraron que los anticuerpos IgG anti-NMO se observan en neuromielitis &oacute;ptica y permite diferenciarla de otras enfermedades desmielinizantes (59). Polman, Reingold, Banwell et al., revisaron los criterios de McDonald en 2010 (60). El tratamiento de la EM ha evolucionado mucho desde la &uacute;ltima d&eacute;cada del siglo pasado, los interferones y el acetato de glatiramer, modificadores de primera generaci&oacute;n para el tratamiento de la forma reca&iacute;da- remisi&oacute;n de la EM est&aacute;n disponibles desde 1990 (61). Otras opciones terap&eacute;uticas que han venido a ocupar un espacio importante en el arsenal terap&eacute;utico de la EM a partir del siglo XXI y que han cambiado el abordaje terap&eacute;utico son los medicamentos orales y los anticuerpos monoclonales. La anhelada terapia oral comenz&oacute; con el fingolimod, despu&eacute;s aparecieron laquinimod, teriflunomida, y dimetil fumarato. Los anticuerpos monoclonales en la EM arrancaron con natalizumab y &eacute;ste abri&oacute; la posibilidad de otros como rituximab, alemtuzumab, ocrelizumab y ofatumumab (62, 63).</p>      <p><B>Conflicto de intereses</B></p>      <p>Los autores declaran no tener conflicto de intereses.</p>  <hr>     <p><font size="3"><B>Referencias</b></font></p>      ]]></body>
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