<?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>1657-9550</journal-id>
<journal-title><![CDATA[Biosalud]]></journal-title>
<abbrev-journal-title><![CDATA[Biosalud]]></abbrev-journal-title>
<issn>1657-9550</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Caldas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1657-95502013000200009</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[IMPLICACIONES METABÓLICAS Y CLÍNICAS DE ALGUNAS DROGAS DE DISEÑO]]></article-title>
<article-title xml:lang="en"><![CDATA[METABOLIC AND CLINICAL IMPLICATIONS OF SOME DESIGNED DRUGS]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Osorio]]></surname>
<given-names><![CDATA[José Henry]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad de Caldas  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2013</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2013</year>
</pub-date>
<volume>12</volume>
<numero>2</numero>
<fpage>110</fpage>
<lpage>117</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S1657-95502013000200009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S1657-95502013000200009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S1657-95502013000200009&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Antecedentes: Las drogas de diseño del tipo anfetamina, o de benzil y fenil piperazina, o del tipo pirrolidinfenona, producen sentimientos de euforia, energía y deseos de socializar, por eso son conocidas como rave drugs o drogas de club. A pesar de que los consumidores aducen que son drogas seguras, estudios experimentales en biomodelos y de tipo epidemiológico en humanos, indican riesgos potenciales para quien las usa. Materiales y Métodos: El presente artículo de revisión analiza, cualitativamente, la literatura científica disponible en las bases de datos Science Direct y PUBMED, relacionada con el metabolismo de estas drogas recreacionales y sus implicaciones en salud. Resultados: Se obtuvo información pertinente relacionada con los objetivos propuestos, por lo cual puede clasificarse en 2 secciones a saber: metabolismo de las drogas de diseño e implicaciones clínicas de su consumo. Conclusión: Las vías metabólicas que involucran isoenzimas P450 son responsables de la degradación hepática de las drogas de diseño. Existen riesgos potenciales para quien las consume, entre los que se encuentran el síndrome de serotonina, hepatotoxicidad, neurotoxicidad y psicopatología.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Background: Designer drugs of the amphetamine, benzyl, phenyl piperazine, or pyrrolidinophenone type produce feelings of euphoria and energy and a desire to socialize, reason why they are known as "rave drugs" or "club drugs". Although consumers adduce that these are safe drugs, experimental studies using bio models and epidemiological studies in humans, indicate potential risks for users. Materials and Methods: The review article analyses quantitatively scientific literature from Science Direct and PUBMED data bases related to metabolism of these drugs and their implications in health. Results: Relevant information related to the objectives proposed in the present review was found and it can be classified in 2 sections as follows: metabolism of designer drugs and clinical implications of consumption of designer drugs. Conclusion: The metabolic pathways which involve P450 isoenzymes are responsible for hepatic degradation of designer drugs. There are potential risks for consumers such as serotonin syndrome, hepatotoxicity, neurotoxicity, and psychopathology.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[drogas de abuso]]></kwd>
<kwd lng="es"><![CDATA[drogas de diseño]]></kwd>
<kwd lng="es"><![CDATA[éxtasis]]></kwd>
<kwd lng="es"><![CDATA[piperazina]]></kwd>
<kwd lng="es"><![CDATA[pirrolidinfenona]]></kwd>
<kwd lng="es"><![CDATA[metabolismo]]></kwd>
<kwd lng="en"><![CDATA[abuse drugs]]></kwd>
<kwd lng="en"><![CDATA[designer drugs]]></kwd>
<kwd lng="en"><![CDATA[ecstasy]]></kwd>
<kwd lng="en"><![CDATA[piperazine]]></kwd>
<kwd lng="en"><![CDATA[pyrrolidinophenone]]></kwd>
<kwd lng="en"><![CDATA[metabolism]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <center><font face="verdana" size="3"><b>IMPLICACIONES METAB&Oacute;LICAS Y CL&Iacute;NICAS DE ALGUNAS DROGAS DE DISE&Ntilde;O    <br>    <br> METABOLIC AND CLINICAL IMPLICATIONS OF SOME DESIGNED DRUGS</b></font></center> <font face="verdana" size="2">     <p align="right"> Jos&eacute; Henry Osorio<a href="#a1"><sup>1</sup></a> </p>     <p> <a name="a1"><sup>1</sup></a> Laboratorio de Investigaci&oacute;n en Bioqu&iacute;mica Cl&iacute;nica y Patolog&iacute;a Molecular, Departamento de Ciencias B&aacute;sicas de la Salud, Universidad de Caldas. Correo electr&oacute;nico: <a href="mailto:jose.osorio_o@ucaldas.edu.co">jose.osorio_o@ucaldas.edu.co</a> </p> <b>RESUMEN</b>     <p> <b>Antecedentes</b>: Las drogas de dise&ntilde;o del tipo anfetamina, o de benzil y fenil piperazina, o del tipo pirrolidinfenona, producen sentimientos de euforia, energ&iacute;a y deseos de socializar, por eso son conocidas como <i>rave drugs</i> o drogas de club. A pesar de que los consumidores aducen que son drogas seguras, estudios experimentales en biomodelos y de tipo epidemiol&oacute;gico en humanos, indican riesgos potenciales para quien las usa. <b>Materiales y M&eacute;todos</b>: El presente art&iacute;culo de revisi&oacute;n analiza, cualitativamente, la literatura cient&iacute;fica disponible en las bases de datos Science Direct y PUBMED, relacionada con el metabolismo de estas drogas recreacionales y sus implicaciones en salud. <b>Resultados</b>: Se obtuvo informaci&oacute;n pertinente relacionada con los objetivos propuestos, por lo cual puede clasificarse en 2 secciones a saber: metabolismo de las drogas de dise&ntilde;o e implicaciones cl&iacute;nicas de su consumo. <b>Conclusi&oacute;n</b>: Las v&iacute;as metab&oacute;licas que involucran isoenzimas P450 son responsables de la degradaci&oacute;n hep&aacute;tica de las drogas de dise&ntilde;o. Existen riesgos potenciales para quien las consume, entre los que se encuentran el s&iacute;ndrome de serotonina, hepatotoxicidad, neurotoxicidad y psicopatolog&iacute;a.  </p>     <p> <b>Palabras clave</b>: drogas de abuso, drogas de dise&ntilde;o, &eacute;xtasis, piperazina, pirrolidinfenona, metabolismo. </p> <b>ABSTRACT</b>     <p> <b>Background</b>: Designer drugs of the amphetamine, benzyl, phenyl piperazine, or pyrrolidinophenone type produce feelings of euphoria and energy and a desire to socialize, reason why they are known as <i>&quot;rave drugs&quot;</i> or <i>&quot;club drugs&quot;</i>. Although consumers adduce that these are safe drugs, experimental studies using bio models and epidemiological studies in humans, indicate potential risks for users. <b>Materials and Methods</b>: The review article analyses quantitatively scientific literature from Science Direct and PUBMED data bases related to metabolism of these drugs and their implications in health. <b>Results</b>: Relevant information related to the objectives proposed in the present review was found and it can be classified in 2 sections as follows:  metabolism of designer drugs and clinical implications of consumption of designer drugs. <b>Conclusion</b>: The metabolic pathways which involve P450 isoenzymes are responsible for hepatic degradation of designer drugs. There are potential risks for consumers such as serotonin syndrome, hepatotoxicity, neurotoxicity, and psychopathology. </p>     <p> <b>Key words</b>: abuse drugs, designer drugs, ecstasy, piperazine, pyrrolidinophenone, metabolism. </p> <b>Abreviaturas</b>     <p> <b>Derivados de la anfetamina</b>: MDA: metilenodioxianfetamina: MDMA: R,S metilenodioximetanfetamina; MDE: R,S metilenodioxietilanfetamina; BDB: R,S-benzodioxazolilbutanamina; MBDB: R,S-N-metil-benzodioxazolilbutanamina; <b>Derivados de la piperazina</b>: benzilpiperazinas (BZP: N-benzilpiperazina; MDBP: R,S-metilenedioxibenzilpiperazina); <b>fenilpiperazinas</b> (mCPP: 1-(3-clorofenil) piperazina; TFMPP: 1-(3 trifluorometilfenil-piperazina; MeOPP: 1-(4-metoxifenil-piperazina). <b>Derivados de la pirrolidinofenona</b>: PPP: R,S-pirrolidinopropiofenona; MOPPP: R,S-metoxi-pirrolidinopropiofenona; MDPPP: R,S metilenedioxi pirrolidinopropiofenona; MPPP: R,S- metil-pirrolidinopropiofenona MPHP: R,S-metil-pirrolidinohexanofenona. </p> <hr>    ]]></body>
<body><![CDATA[<br> </font>     <center><font face="verdana" size="3"><b>INTRODUCCI&Oacute;N</b></font></center> <font face="verdana" size="2">     <p> El eslogan PLUR (<i>peace, love, unity and respect</i>) comprende los valores de la denominada &quot;cultura rave&quot;, una versi&oacute;n moderna del fen&oacute;meno <i>hippy</i> de los a&ntilde;os sesenta, pero en la cual las fiestas clandestinas en las que participan personas plenamente integradas a la sociedad, incluyen m&uacute;sica electr&oacute;nica y el consumo simult&aacute;neo de m&uacute;ltiples sustancias qu&iacute;micas con &aacute;nimo recreativo (1-3). &Uacute;ltimamente se denomina a esta tendencia &quot;cultura de club&quot; o simplemente &quot;fiesta&quot;, por haber sido trasladada a los clubes del mundo (4); en ella predomina el consumo de 3,4-metilendioximetanfetamina (MDMA o &quot;&eacute;xtasis&quot;) y sus derivados, el gammahidroxibutirato (GHB, &quot;&eacute;xtasis l&iacute;quido&quot;), la metanfetamina (<i>speed</i>), la ketamina, el flunitrazepam, el dextrometorfano, el &oacute;xido nitroso, la lisergida (LSD) o los hongos tipo <i>Psylocibe</i>, durante sesiones marat&oacute;nicas de baile al ritmo de la m&uacute;sica electr&oacute;nica, buscando con ello un estado trascendente de euforia, con amplificaci&oacute;n de sensaciones de euforia o de alucinaci&oacute;n (5). Por eso, es com&uacute;n el consumo asociado de varias drogas a la vez (6-8). </p>     <p> El grupo de sustancias de s&iacute;ntesis con efectos intermedios entre los alucin&oacute;genos y los estimulantes, se denomina &quot;drogas de dise&ntilde;o&quot; e incluye sustancias como los derivados anfetam&iacute;nicos, los entact&oacute;genos y los alucin&oacute;genos, el cual debe diferenciarse de otro grupo de sustancias denominadas &quot;drogas de s&iacute;ntesis&quot;, que incluye varias sustancias de consumo il&iacute;cito y de naturaleza sint&eacute;tica, como el LSD, hero&iacute;na, derivados triptam&iacute;nicos, entre otras. La estructura original de la dextro-anfetamina se sintetiz&oacute; en 1887, y en 1914 Merck patent&oacute; drogas como el MDMA, m&aacute;s conocida como &eacute;xtasis, el MDA (Ad&aacute;n) y el MDE (Eva), buscando f&aacute;rmacos anorex&iacute;genos, pero sus efectos psicoestimulantes solo se describieron hasta 1933 (9, 10). La toxicidad de las anfetaminas se potencia con el alcohol (11). La metanfetamina es el psicoestimulante usado m&aacute;s frecuentemente, puede ser inyectable, fumable o tomada oralmente. La anfetamina es mucho menos popular y los consumidores de otras drogas como la hero&iacute;na, se inclinan m&aacute;s por el metilfenidato (Ritalina), <i>metcation</i> (<i>cat and goobs</i>) y metilenodioximetanfetamina (MDMA) conocido como &eacute;xtasis (12). De manera general, dentro de las drogas de dise&ntilde;o&quot; pueden identificarse dos grupos, a saber: anfetaminas entact&oacute;genas (capacidad de producir inusitada apertura emocional y empat&iacute;a afectiva para con el entorno inmediato que rodea al adicto en el momento de padecimiento de los efectos t&iacute;picos) o derivados metilenodioxianfetaminas, como 3,4-metilenodioxianfetamina, conocida como MDA o &quot;p&iacute;ldora del amor&quot;; 3,4-metilelenodioximetanfetamina (MDMA, &quot;&eacute;xtasis&quot;, &quot;Ad&aacute;n&quot;, XTC); 3,4-metilenodioxietilanfetamina (MDEA o MDE, &quot;Eva&quot;); N-metil-1-(3,4-metilenodioxifenil)-2 butamina (MBDB) y anfetaminas alucin&oacute;genas (derivados metoxianfetaminas) como 4-bromo-2,5-dimetoxianfetamina (DOB); 4-metil-2,5-dimetoxianfetamina (DOM, <i>serenity-tranquility-peace</i> o STP); 2,4,5-trimetoxianfetamina (TMA-2); parametoxianfetamina (PMA) (13). </p>     <p> Existen otros dos grupos importantes de drogas de dise&ntilde;o: las derivadas de la piperazina (benzilpiperazinas y fenilpiperazinas) y las derivadas de la pirrolidinofenona (14). </p>     <center><img src="img/revistas/biosa/v12n2/v12n2a09f1.gif"></center>    <br> </font>     <center><font face="verdana" size="3"><b>METABOLISMO DE LAS DROGAS DE DISE&Ntilde;O</b></font></center> <font face="verdana" size="2">     <p> <b>Metabolismo de las anfetaminas</b> </p>     <p> Las anfetaminas pueden ingresar al organismo v&iacute;a oral, por inhalaci&oacute;n o por inyecci&oacute;n intravenosa. Se absorben directamente de la mucosa nasal y gastrointestinal y penetran libremente la barrera hematoencef&aacute;lica (15). Su metabolismo es muy variable y cerca del 30% del producto consumido puede ser eliminado sin cambios en la orina. La vida media en plasma var&iacute;a entre 5 y 30 horas, dependiendo del flujo de orina y el pH, present&aacute;ndose mayor eliminaci&oacute;n en orinas &aacute;cidas (16). Las anfetaminas o sus metabolitos pueden ser detectadas en la orina por varios d&iacute;as despu&eacute;s de la ingesti&oacute;n y su excreci&oacute;n es prolongada despu&eacute;s de la administraci&oacute;n de grandes dosis o en presencia de orina alcalina; por eso algunos consumidores toman deliberadamente bicarbonato al mismo tiempo, para retardar la excreci&oacute;n y mejorar el efecto de la droga (17). El &eacute;xtasis, derivado de la anfetamina, tiene efectos similares que comienzan aproximadamente 20 minutos despu&eacute;s de la ingesti&oacute;n, con una duraci&oacute;n que va entre las 5 y las 48 horas, siendo metabolizado por el h&iacute;gado y eliminado v&iacute;a renal (18, 19). Los metabolitos de las fases I y II de las drogas de dise&ntilde;o, han sido identificados en orina y microsomas hep&aacute;ticos de humanos y ratas (20). Dos v&iacute;as son postuladas, la primera incluye demetilaci&oacute;n seguida por metilaci&oacute;n y la segunda glucoronidaci&oacute;n y/o sulfataci&oacute;n. La demetilaci&oacute;n es principalmente catalizada por CYP2D1:6 o CYP3A2:4, pero tambi&eacute;n por mecanismos CYP independientes. En humanos, MDMA y MBDB podr&iacute;an adem&aacute;s ser demetilados por CYP1A2. La N-demetilaci&oacute;n es principalmente catalizada por CYP1A2, as&iacute; como la <i>N</i>-deetilaci&oacute;n por CYP3A2:4. (21). </p> <b>Metabolismo de las piperazinas</b>     ]]></body>
<body><![CDATA[<p> Las benzilpiperazinas son metabolizadas por alteraci&oacute;n de su grupo arom&aacute;tico, mediante hidroxilaci&oacute;n o mediante demetilaci&oacute;n. Luego de una <i>N</i>-dealquilaci&oacute;n pasan a piperazina y degradaci&oacute;n metab&oacute;lica de la piperazina heteroc&iacute;clica a su correspondiente etilenodimina o anilina y sus derivados (22). Las fenilpiperazinas son m&aacute;s extensamente metabolizadas que las benzilpiperazinas y excretadas casi exclusivamente como metabolitos. La mayor cantidad de reacciones metab&oacute;licas se dan por la alteraci&oacute;n metab&oacute;lica del grupo arom&aacute;tico por hidroxilaci&oacute;n o mediante <i>O</i>-demetilaci&oacute;n del metoxi. La correspondiente degradaci&oacute;n de piperazina a su correspondiente etilenodiamina o anilina tambi&eacute;n puede observarse. Una segunda fase de reacciones ha sido reportada, caracterizada por glucoronidaci&oacute;n parcial o sulfataci&oacute;n de los metabolitos fen&oacute;licos, metilaci&oacute;n de los catecols y acetilaci&oacute;n parcial a anilina (23). Estudios de identificaci&oacute;n de las isoenzimas CYP involucradas en la mayor&iacute;a de etapas metab&oacute;licas muestran que la hidroxilaci&oacute;n de mCPP as&iacute; como de la demetilaci&oacute;n de MeOPP son catalizadas exclusivamente por CYP2D6 (24) Se han identificado tres isoformas, CYP1A2, CYP2D6 y CYP3A4, capaces de catalizar la hidroxilaci&oacute;n de TFMPP en la cual CYP2D6 es la enzima m&aacute;s importante, responsable de cerca del 80% de su metabolismo (25). </p> <b>Metabolismo de los derivados de la pirrolidinofenona</b>     <p> La PPP se muestra metab&oacute;licamente alterada a nivel de su anillo pirrolidina el cual se oxida a su correspondiente lact&aacute;mico o se degrada metab&oacute;licamente mediante doble dealquilaci&oacute;n a cationina, seguida de reducci&oacute;n de su grupo ceto. En contraste a sus derivados, no se observa desaminaci&oacute;n oxidativa de sus correspondientes metabolitos 2-oxo (26). Todas las otras drogas son metabolizadas principalmente a sus sustituyentes arom&aacute;ticos, mediante oxidaci&oacute;n de sus grupos metilo a su correspondiente &aacute;cido carbox&iacute;lico (MPPP, MHPH), por <i>O</i>-demetilaci&oacute;n a metoxi (MOPPP) o por demetilenaci&oacute;n de su grupo metilenodioxi (MDPPP). La hidroxilaci&oacute;n de la cadena lateral solo se observa en el derivado con cadena lateral elongada MPHP. Una segunda fase de reacciones ha sido reportada, caracterizada por metilaci&oacute;n de los <i>catecols.</i>, glucoronidaci&oacute;n parcial o sulfataci&oacute;n de los metabolitos hidroxi, y glucoronidaci&oacute;n parcial de los metabolitos carboxi (27, 28). Las enzimas CYP involucradas principalmente son CYP2D6 y CYP2C19, siendo CYP2D6 la mayor enzima. Estas son las encargadas de las reacciones de hidroxilaci&oacute;n, <i>O</i>-demetilaci&oacute;n y memetilenaci&oacute;n fundamentalmente. CYP1A2, CYP2B6, y CYP2C9 se encuentran adicionalmente involucradas en la hidroxilaci&oacute;n de MPPP y MPHP en menor grado (29).  </p> </font>     <center><font face="verdana" size="3"><b>IMPLICACIONES CLIN&Iacute;CAS DEL CONSUMO DE DROGAS DE DISE&Ntilde;O</b></font></center> <font face="verdana" size="2">     <p> El mecanismo de acci&oacute;n de las drogas de dise&ntilde;o involucra a varios neurotransmisores como dopamina, serotonina, adrenalina y noradrenalina. Las propiedades entact&oacute;genas (capacidad de producir inusitada apertura emocional y empat&iacute;a afectiva para con el entorno inmediato que rodea al adicto en el momento de padecimiento de los efectos t&iacute;picos), de algunas de ellas obedecen a un mecanismo mixto, similar al que se propone para las anorex&iacute;genas, en el que intervendr&iacute;a una liberaci&oacute;n de dopamina en numerosas &aacute;reas cerebrales, como la corteza motora, el hipot&aacute;lamo y el sistema l&iacute;mbico, as&iacute; como una inhibici&oacute;n de la recaptaci&oacute;n de serotonina (30). Otras drogas, como el caso de algunas alucin&oacute;genas, presentan afinidad relativamente elevada por los receptores 5-HT2A (31), coincidiendo con el mecanismo propuesto para alucin&oacute;genos cl&aacute;sicos como el LSD (32). Por otro lado est&aacute; el mecanismo de aminas simpaticomim&eacute;ticas desarrollado por todos los derivados de estructura fenilisopropilamina, y que se caracteriza por una estimulaci&oacute;n tanto directa (estimulaci&oacute;n de receptores adren&eacute;rgicos) como indirecta (incremento de la liberaci&oacute;n) del sistema nervioso vegetativo simp&aacute;tico (33). </p>     <p> De acuerdo con lo anterior varios sistemas est&aacute;n implicados en los efectos del consumo de drogas de dise&ntilde;o, sin embargo los dos sistemas m&aacute;s implicados son el sistema nervioso central y el cardiovascular. Sobre el sistema nervioso central, a bajas dosis (10 mg v&iacute;a oral) producen estimulaci&oacute;n y conducen a estado de alerta, elaci&oacute;n, euforia, incremento en la autoestima y activaci&oacute;n conductual (34); cuando se incrementa la dosis entre 50 y 100 mg por v&iacute;a oral, los sujetos normales desarrollan una euforia exagerada, estado disf&oacute;rico caracterizado por recelo, deterioro cognitivo, sensaci&oacute;n de grandeza, embotamiento, ilusiones, conductas compulsivas y activaci&oacute;n o retardo de la psicomotricidad. Cuando se administran 100 mg v&iacute;a oral diariamente durante 3 &oacute; 4 d&iacute;as, se induce una psicosis florida por anfetaminas (35). Algunos estudios reportan que los disturbios psiqui&aacute;tricos m&aacute;s comunes entre las personas que usan afetaminas por primera vez son la ansiedad, la man&iacute;a y el p&aacute;nico (36). Con relaci&oacute;n al sistema cardiovascular, por estimulaci&oacute;n del sistema simp&aacute;tico se generan grados variables de taquicardia, vasoconstricci&oacute;n, efectos impredecibles sobre la presi&oacute;n sangu&iacute;nea y arritmias, dependiendo de la dosis dada y la presencia o ausencia de enfermedad cardiovascular coexistente. La hipertensi&oacute;n es com&uacute;n, pero puede presentarse hipotensi&oacute;n severa, debido a supresi&oacute;n parad&oacute;jica central del simp&aacute;tico, un estado posterior a la depleci&oacute;n de catecolaminas (37, 38) Los cambios hemodin&aacute;micos asociados a estimulaci&oacute;n simp&aacute;tica incrementan la demanda de ox&iacute;geno por el miocardio. El uso cr&oacute;nico de anfetaminas o sus derivados puede causar episodios a repetici&oacute;n de espasmo coronario y paroxismos de hipertensi&oacute;n, lo que puede desencadenar da&ntilde;o endotelial, disecci&oacute;n de arteria coronaria y aceleraci&oacute;n del proceso ateroscler&oacute;tico (39-42), una vasculitis necrotizante que puede involucrar arterias de mediano y peque&ntilde;o calibre en la mayor&iacute;a de los &oacute;rganos y puede llevar a una isquemia generalizada en algunos consumidores (43); adem&aacute;s, la administraci&oacute;n prolongada de agentes simpaticomim&eacute;ticos, puede estar asociada a cardiomiopat&iacute;a dilatada irreversible (44) y sus efectos t&oacute;xicos pueden ser nocivos para vasos pulmonares (45). Los cambios cardiovasculares adversos y la estimulaci&oacute;n simp&aacute;tica asociada a la administraci&oacute;n de estos compuestos puede precipitar una amplia e impredecible rango de taquiarritmias ventriculares y supraventriculares potencialmente letales (46). </p>     <p> Algunos autores (47) clasifican los efectos de las drogas de dise&ntilde;o como objetivos: alteraciones hormonales, estre&ntilde;imiento o diarrea, cefaleas, incoordinaci&oacute;n motora, dificultad en la eyaculaci&oacute;n, retenci&oacute;n urinaria, cansancio, anorexia, insomnio, locuacidad, euforia, bruxismo, temblores, trismo, hipertermia, piloerecci&oacute;n, midriasis, hipertensi&oacute;n, arritmias, taquicardia. <b>Subjetivos</b>: empat&iacute;a, sensualidad, alteraciones sensoriales, disminuci&oacute;n del miedo, felicidad, autoestima, espiritualidad, agobio, pensamientos extra&ntilde;os, ansiedad, desorientaci&oacute;n, confusi&oacute;n, irritabilidad, obsesi&oacute;n, p&aacute;nico, angustia, inquietud, percepci&oacute;n del tiempo alterada. <b>Residuales</b>: fatiga, dificultad para concentrarse, anorexia, apat&iacute;a, insomnio, irritabilidad, depresi&oacute;n, falta de deseo sexual, dolores musculares. <b>T&oacute;xicos</b>: hipertermia, rabdomiolisis, hepatotoxicidad, arritmias card&iacute;acas, hipertensi&oacute;n arterial, p&eacute;rdida de memoria, asistolias, colapso cardiovascular, coagulaci&oacute;n intravascular diseminada, insuficiencia renal aguda, hiponatremia, psicosis anfetam&iacute;nica.  </p>     <p> Por otro lado se relaciona constantemente al s&iacute;ndrome de serotonina con el consumo de drogas de dise&ntilde;o; dicho s&iacute;ndrome, tambi&eacute;n denominado serotonin&eacute;rgico, es una condici&oacute;n cl&iacute;nica asociada al uso de medicamentos agonistas de la serotonina, que se presenta por una excesiva estimulaci&oacute;n de los receptores centrales y perif&eacute;­ricos de serotonina y produce cambios mentales, auton&oacute;micos y neuromusculares. Los s&iacute;ntomas ocurren en cuesti&oacute;n de minutos a horas y pueden ser: agitaci&oacute;n o inquietud, diarrea, latidos card&iacute;acos r&aacute;pidos, alucinaciones, incremento de la temperatura corporal, n&aacute;useas, reflejos hiperactivos, p&eacute;rdida de la coordinaci&oacute;n, cambios r&aacute;pidos en la presi&oacute;n arterial y v&oacute;mitos. Usualmente se resuelve en las primeras 24 horas de iniciados los s&iacute;ntomas con tan solo la suspensi&oacute;n del agente causal y medidas de soporte, sin embargo puede progresar a falla multisist&eacute;mica y a la muerte (48). Sin embargo, debe tenerse en cuenta que entre el 5 y el 9% de los hombres y mujeres de raza cauc&aacute;sica carecen de una enzima perteneciente al grupo CYP-450, responsable de la N-desmetilaci&oacute;n del MDMA (CYP2D6) (49, 50). Estos individuos ser&aacute;n menos sensibles a los efectos excitatorios, pero m&aacute;s proclives a sufrir una intoxicaci&oacute;n por sobredosis. </p> </font>     <center><font face="verdana" size="3"><b>CONCLUSI&Oacute;N</b></font></center> <font face="verdana" size="2">     <p> Las v&iacute;as metab&oacute;licas que involucran isoenzimas P450 son responsables de la degradaci&oacute;n hep&aacute;tica de las drogas de dise&ntilde;o. Existen riesgos potenciales para quien las consume, entre ellos se encuentran el s&iacute;ndrome de serotonina, hepatotoxicidad, neurotoxicidad y psicopatolog&iacute;a. Los sistemas org&aacute;nicos m&aacute;s seriamente afectados son el nervioso y el cardiovascular. Existen personas con deficiencias hereditarias de CYPD6, que sin saberlo, est&aacute;n m&aacute;s expuestos a la intoxicaci&oacute;n por drogas de dise&ntilde;o. </p> <hr>    <br> </font>     ]]></body>
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