<?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>0034-7515</journal-id>
<journal-title><![CDATA[Revista Cubana de Farmacia]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Cubana Farm]]></abbrev-journal-title>
<issn>0034-7515</issn>
<publisher>
<publisher-name><![CDATA[Editorial Ciencias Médicas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0034-75151997000200012</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Centro de química farmacéutica tiazolidinadionas: una nueva familia de hipoglicemiantes orales]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rodríguez Riera]]></surname>
<given-names><![CDATA[Zalua]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Xuárez Marill]]></surname>
<given-names><![CDATA[Lisbet]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fernández Falcón]]></surname>
<given-names><![CDATA[Carlota A]]></given-names>
</name>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Centro de Química Farmacéutica  ]]></institution>
<addr-line><![CDATA[La Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>1997</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>1997</year>
</pub-date>
<volume>31</volume>
<numero>2</numero>
<fpage>138</fpage>
<lpage>144</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0034-75151997000200012&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0034-75151997000200012&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0034-75151997000200012&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[A partir de un estudio de la literatura más actualizada se presenta una revisión bibliográfica de una nueva serie de compuestos conocidos como tiazolidinadionas. Se consultaron las bases de datos Medline (1989-8/96), Excerpta Medica (1990-7/96), Predicast (1992-6/96), Medical Research Division (1991) y Life Science (1993-95). Se resumen los resultados obtenidos en los estudios preclínicos y clínicos de los derivados de esta familia conocidos hasta el momento.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[A bibliographic review of a new series of compunds known as thiazolidinediones is made from a study of the most current and up-dated literature. Databases such as MEDLINE (1989-8/96), Excerpta Medica (1990-7/96), Predicast (1992-6/96), Medical Research Division (1991) and Life Science (1993-95) were consulted. Results obtained from preclinical and clinical trials of the derivates of this family known up to the present, are reported.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[TIAZOLES]]></kwd>
<kwd lng="es"><![CDATA[INSULINA]]></kwd>
<kwd lng="es"><![CDATA[HIPERGLICEMIA]]></kwd>
<kwd lng="es"><![CDATA[HIPERINSULINISMO]]></kwd>
<kwd lng="es"><![CDATA[HIPERTRIGLICERIDEMIA]]></kwd>
<kwd lng="es"><![CDATA[DIABETES MELLITUS NO INSULINO DEPENDIENTE]]></kwd>
<kwd lng="es"><![CDATA[TEST DE TOLERANCIA A LA GLUCOSA]]></kwd>
<kwd lng="es"><![CDATA[MODELOS ANIMALES DE ENFERMEDAD.]]></kwd>
<kwd lng="en"><![CDATA[THIAZOLES]]></kwd>
<kwd lng="en"><![CDATA[INSULIN]]></kwd>
<kwd lng="en"><![CDATA[HY-PERGLYCEMIA]]></kwd>
<kwd lng="en"><![CDATA[HYPERINSULINISM]]></kwd>
<kwd lng="en"><![CDATA[HYPERTRIGLICERIDEMIA]]></kwd>
<kwd lng="en"><![CDATA[DIABETES MELLITUS; NON-INSULIN-DEPENDENT]]></kwd>
<kwd lng="en"><![CDATA[GLUCOSE TOLERANCE TEST]]></kwd>
<kwd lng="en"><![CDATA[DISEASE MODELS, ANIMALS]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <H3> Art&iacute;culo de Revisi&oacute;n</H3>      <H2>   Centro de qu&iacute;mica farmac&eacute;utica tiazolidinadionas: una nueva   familia de hipoglicemiantes orales</H2>   <I>Zalua Rodr&iacute;guez Riera,<SUP>1</SUP> Lisbet Xu&aacute;rez Marill<SUP>2</SUP>   y Carlota A. Fern&aacute;ndez Falc&oacute;n<SUP>3</SUP></I>   <DIR><I>1</I> Licenciada en Qu&iacute;mica. Aspirante a Investigadora.       <BR>2 M&aacute;ster en Qu&iacute;mica. Aspirante a Investigadora.       <BR>3 Licenciada en Informaci&oacute;n Cient&iacute;fica y Bibliotecolog&iacute;a.</DIR>      <H4>   RESUMEN</H4>   A partir de un estudio de la literatura m&aacute;s actualizada se presenta   una revisi&oacute;n bibliogr&aacute;fica de una nueva serie de compuestos   conocidos como tiazolidinadionas. Se consultaron las bases de datos Medline   (1989-8/96), Excerpta Medica (1990-7/96), Predicast (1992-6/96), Medical   Research Division (1991) y Life Science (1993-95). Se resumen los resultados   obtenidos en los estudios precl&iacute;nicos y cl&iacute;nicos de los derivados   de esta familia conocidos hasta el momento.          <P><I>Descriptores DeCS:</I> TIAZOLES/farmacolog&iacute;a; INSULINA/fisiolog&iacute;a;   HIPERGLICEMIA/fisiopatolog&iacute;a; HIPERINSULINISMO/fisiopatolog&iacute;a;   HIPERTRIGLICERIDEMIA/fisiopatolog&iacute;a; DIABETES MELLITUS NO INSULINO   DEPENDIENTE; TEST DE TOLERANCIA A LA GLUCOSA; MODELOS ANIMALES DE ENFERMEDAD.          <P>La diabetes mellitus no insulino-dependiente o tipo II se caracteriza   por la secreci&oacute;n irregular de insulina desde el p&aacute;ncreas   y por la insulino-resistencia que se manifiesta cuando los tejidos se hacen   resistentes a la acci&oacute;n de la insulina, lo que provoca un incremento   de glucosa en sangre. El control de la enfermedad se logra mediante ejercicios   f&iacute;sicos, dietas alimenticias y el uso de los hipoglicemiantes orales.<SUP>1</SUP>          <P>Los hipoglicemiantes orales son medicamentos que disminuyen la cantidad   de glucosa en sangre. No son iguales a la insulina, ni la pueden sustituir,   tampoco curan la diabetes pero tienen la ventaja que se pueden ingerir,   porque a diferencia de la insulina no se destruyen en el tracto gastrointestinal.<SUP>1</SUP>          <P>En la actualidad se estudian muchas mol&eacute;culas por su acci&oacute;n   hipoglicemiante diferente a las sulfonilureas y biguanidas, &eacute;stas   son heterog&eacute;neas tanto en su estructura qu&iacute;mica como en su   mecanismo de acci&oacute;n y pueden clasificarse, seg&uacute;n <I>Presti,</I><SUP>2</SUP>   en 3 grandes grupos:   <UL>       <LI>   Las que interfieren en la digesti&oacute;n y absorci&oacute;n de los carbohidratos.</LI>       </UL>      <UL>       <LI>   Las que son activas sobre el p&aacute;ncreas endocrino tanto en las c&eacute;lulas   b como en otros tipos de c&eacute;lulas.</LI>       ]]></body>
<body><![CDATA[</UL>      <UL>       <LI>   Las que act&uacute;an a nivel extrapancre&aacute;tico porque incrementan   la acci&oacute;n de la insulina sin estimular su secreci&oacute;n en el   p&aacute;ncreas.</LI>       </UL>   La s&iacute;ntesis de nuevos compuestos pertenecientes a este &uacute;ltimo   grupo, que mejoren la acci&oacute;n de la insulina y logren controlar la   diabetes mellitus no insulino-dependiente constituye un nuevo enfoque a   nivel mundial.<SUP>3</SUP> Los derivados de las tiazolidinadionas se incluyen   dentro de este grupo y se conocen como sensibilizadores de insulina por   el efecto que producen. Dentro de ellas se encuentran la ciglitazona, la   pioglitazona, la troglitazona y la englitazona entre otras.          <P>El objetivo de este trabajo es presentar una revisi&oacute;n bibliogr&aacute;fica   sobre los derivados de las tiazolidinadionas, conocidos hasta el momento.   Se resumen los resultados obtenidos en los estudios precl&iacute;nicos   y cl&iacute;nicos de estos compuestos. Para ello se consultaron las bases   de datos Medline (1989-8/96), Excerpta Medica (1990-7/96), Predicast (1992-6/96),   Medical Research Division (1991) y Life Science (1993-95).   <H4>   DERIVADOS DE LAS TIAZOLIDINADIONAS</H4>   En 1982, <I>Shoda</I><SUP>4</SUP> <I>y otros</I>, reportaron una serie   de derivados de las tiazolidinadionas como nuevos agentes antidiab&eacute;ticos   que fueron efectivos en la reducci&oacute;n de la insulino-resistencia   e incrementaron la acci&oacute;n de la insulina en animales diab&eacute;ticos.   El prototipo de esta familia es la ciglitazona (inicialmente conocida por   ADD-3878 &oacute; U-63,287), que en modelos de animales no insulino-resistentes   normaliz&oacute; la hiperglicemia, la hiperinsulinemia y la hipertrigliceridemia.<SUP>5</SUP>          <P>A partir de este momento se comenz&oacute; a trabajar en la s&iacute;ntesis   y el estudio biol&oacute;gico de una serie de an&aacute;logos estructurales   de la ciglitazona, tales como: la pioglitazona (AD-4833 &oacute; U-72,107),   troglitazona (CS-045) y la englitazona (CP-68722).          <P>Algunas de las caracter&iacute;sticas y propiedades farmacol&oacute;gicas   de estos compuestos son:          <P><I>CIGLITAZONA</I>          <P><I>(+/-)5-[4-(1-metilciclohexilmetoxi) bencil]2,4 tiazo-lidinadiona</I>          <P>Los estudios precl&iacute;nicos de la ciglitazona (figura 1) en animales   diab&eacute;ticos tipo II comprobaron que mejoraba la tolerancia a la glucosa   y disminu&iacute;a la secreci&oacute;n de insulina.<SUP>6,7</SUP> Su mecanismo   de acci&oacute;n no se ha definido. Los estudios en el tejido adiposo y   en el m&uacute;sculo esqueletal demostraron que mejoraba la sensibilidad   o respuesta de los tejidos a la acci&oacute;n de la insulina.<SUP>8-10</SUP>   Este mismo efecto se comprob&oacute; en modelos de animales insulino-resistentes.<SUP>11</SUP>   Cuando se realizaron los estudios cl&iacute;nicos con dosis de 125 mg en   pacientes con diabetes mellitus no insulino-dependiente se logr&oacute;   una r&aacute;pida disminuci&oacute;n de los niveles de glucosa y triglic&eacute;ridos.<SUP>12,13</SUP>   Por esos resultados se expandi&oacute; en Jap&oacute;n hasta la fase II   aplicando dosis entre 30 y 500 mg, pero no se obtuvo una buena respuesta   en la disminuci&oacute;n de triglic&eacute;ridos por lo que su desarrollo   fue descontinuado.<SUP>14</SUP>       <CENTER><A HREF="/img/revistas/far/v31n2/f112297.gif"><IMG SRC="/img/revistas/far/v31n2/f112297.gif" ALT="Figura 1" VSPACE=10 BORDER=1 HEIGHT=101 WIDTH=220></A></CENTER>          
]]></body>
<body><![CDATA[<CENTER>FIGURA 1. Estructura qu&iacute;mica de la ciglitazona.</CENTER>             <P><I>PIOGLITAZONA</I>          <P><I>(+/-)-5-{4-[2-(5-etil-2-piridinil)etoxi]bencil}2,4 tia-zolidinadiona</I>          <P>En 1990, <I>Shoda</I><SUP>15</SUP> realiz&oacute; un estudio de relaci&oacute;n   estructura-actividad biol&oacute;gica de una serie de compuestos donde   el fragmento de 1-metilciclohexilmetoxi de la ciglitazona fue sustituido   por uno de 2-piridiniletoxi, que con respecto a la actividad hipoglic&eacute;mica   e hipolipid&eacute;mica fue aproximadamente de 5 a 10 veces m&aacute;s   potente que la ciglitazona. De todos los compuestos estudiados se seleccion&oacute;   la pioglitazona (figura 2) por ofrecer tambi&eacute;n una buena respuesta   en animales insulino-resistentes.       <CENTER><A HREF="/img/revistas/far/v31n2/f212297.gif"><IMG SRC="/img/revistas/far/v31n2/f212297.gif" ALT="Figura 2" VSPACE=10 BORDER=1 HEIGHT=96 WIDTH=219></A></CENTER>          
<CENTER>FIGURA 2. Estructura qu&iacute;mica de la pioglitazona.</CENTER>             <P>A partir del estudio de relaci&oacute;n estructura-actividad biol&oacute;gica   de la pioglitazona y sus derivados se pudo concluir que la presencia del   anillo piridinil, enlazado a la cadena alcoxi que est&aacute; unida al   anillo benc&eacute;nico en su estructura, potencia la actividad biol&oacute;gica.   Particularmente la presencia de un &aacute;tomo de nitr&oacute;geno en   posici&oacute;n alfa con respecto a la cadena oxietil juega un papel importante   en esta actividad.<SUP>15</SUP>          <P>En 1991, <I>Momose</I><SUP>16</SUP> public&oacute; su s&iacute;ntesis   qu&iacute;mica y el estudio de la actividad biol&oacute;gica en modelos   de animales diab&eacute;ticos tipo II. La patente pertenece a la compa&ntilde;&iacute;a   Takeda-Upjon de Jap&oacute;n.<SUP>17</SUP> La acci&oacute;n de este compuesto   disminuye la concentraci&oacute;n de glucosa, triglic&eacute;ridos e insulina   circulante y mejora la tolerancia a la glucosa en modelos de animales con   insulino-resistencia por un incremento de la sensibilidad de los tejidos   a la insulina.<SUP>18-20</SUP> Esto se origina por el aumento de la actividad   de la tirosinkinasa, que act&uacute;a como mediador de la uni&oacute;n   de la insulina al receptor.<SUP>21,22</SUP>          <P>Actualmente los estudios biol&oacute;gicos est&aacute;n dirigidos a   demostrar el efecto regulador de este compuesto sobre los transportadores   de glucosa, que constituye un indicador de su eficacia para el tratamiento   de la diabetes mellitus no insulino-dependiente.<SUP>23,24</SUP>          <P>Adem&aacute;s, se estudia su efecto hipotensor porque se conoce que   diferentes entidades qu&iacute;micas que act&uacute;an como sensibilizadores   de insulina disminuyen la hipertensi&oacute;n, que est&aacute; frecuentemente   asociada con la insulino-resistencia.<SUP>25-27</SUP>          ]]></body>
<body><![CDATA[<P><I>Shoda</I><SUP>28</SUP> logr&oacute; sintetizar en 1995 el metabolito   de la pioglitazona, lo que permiti&oacute; comprobar su estructura y estudiar   sus propiedades farmacol&oacute;gicas.          <P><I>TROGLITAZONA</I>          <P><I>(+/-)-5-[4-(6-hidroxi-2,5,7,8-tetrametilcroman-2-ilme-toxi)bencil]2,4   tiazolidinadiona</I>          <P>La troglitazona (figura 3) fue desarrollada por <I>Yoshioka</I><SUP>29</SUP>   y patentada por la compa&ntilde;&iacute;a Sankyo de Jap&oacute;n en 1991.<SUP>30</SUP>   Este compuesto disminuye la concentraci&oacute;n de glucosa, insulina y   el nivel de triglic&eacute;ridos en sangre en modelos de animales diab&eacute;ticos   insulino-resistentes.<SUP>31,32</SUP> Adem&aacute;s provoca una disminuci&oacute;n   de la peroxidaci&oacute;n lip&iacute;dica que es una de las causas del   surgimiento de la macro y microangiopat&iacute;a diab&eacute;tica.<SUP>29</SUP>       <CENTER><A HREF="/img/revistas/far/v31n2/f312297.gif"><IMG SRC="/img/revistas/far/v31n2/f312297.gif" ALT="Figura 3" VSPACE=10 BORDER=1 HEIGHT=98 WIDTH=256></A></CENTER>          
<CENTER>FIGURA 3. Estructura qu&iacute;mica de la troglitazona.</CENTER>             <P>El estudio cl&iacute;nico fase I en Jap&oacute;n se realiz&oacute; en   204 pacientes con diabetes mellitus no insulino-dependiente. De ellos,   73 recibieron una dosis diaria de 200 mg y 131 de 400 mg. Como resultado   se comprob&oacute; que este compuesto ejerce un efecto hipoglic&eacute;mico-dosis   dependiente, siendo la dosis de 400 mg la m&aacute;s efectiva. Adem&aacute;s   se demostr&oacute; que es m&aacute;s efectivo en los pacientes diab&eacute;ticos   con una alta insulino-resistencia (obesos).<SUP>33</SUP> Posteriormente   la fase III de estudios cl&iacute;nicos demostr&oacute; que en los pacientes   con diabetes tipo II se mejora la tolerancia a la glucosa sin estimular   la secreci&oacute;n de insulina desde el p&aacute;ncreas, es decir, mediante   efectos extrapancre&aacute;ticos.<SUP>34</SUP>          <P>Los resultados obtenidos en el estudio cl&iacute;nico confirmaron que   la troglitazona provoca un aumento de la sensibilidad de los tejidos a   la insulina. Esta hip&oacute;tesis fue confirmada con el resultado de su   efecto sobre la insulino-resistencia y las anormalidades metab&oacute;licas,   surgidas en pacientes diab&eacute;ticos no insulino-dependientes.<SUP>35</SUP>          <P><I>ENGLITAZONA</I>          <P><I>(+/-)-5-[3,4 dihidro-2-fenilmetil-2H-1-benzopiran-6-il)metil 2,4   tiazolidinadiona</I>          ]]></body>
<body><![CDATA[<P>Este compuesto (figura 4) fue sintetizado por <I>Clark</I> en 1990 (Clark   DA, Goldstein SW, Hulin B, Volkman RA, Eggler JF, Holland GF, et al. Synthesis   and SAR of substituted dihydrobenzopyran and dihydrobenzofuran thiazolidine-2,4-diones   for hypoglycemic activity. 199th American Chemical Society Meeting, Boston,   MA, April 1990).<SUP>36</SUP> El estudio de su actividad biol&oacute;gica   en animales diab&eacute;ticos tipo II demostr&oacute; que tienen un efecto   hipoglicemiante superior a la ciglitazona, y que al igual que las anteriores   aumenta la acci&oacute;n de la insulina y mejora la insulino-resistencia.<SUP>37</SUP>   Adem&aacute;s tiene una actividad insulinomim&eacute;tica <I>in vitro</I>   con respecto a la estimulaci&oacute;n de los transportadores de glucosa.<SUP>38</SUP>       <CENTER><A HREF="/img/revistas/far/v31n2/f412297.gif"><IMG SRC="/img/revistas/far/v31n2/f412297.gif" ALT="Figura 4" VSPACE=10 BORDER=1 HEIGHT=101 WIDTH=251></A></CENTER>          
<CENTER>FIGURA 4. Estructura qu&iacute;mica de la englitazona.</CENTER>             <P>Otros nuevos derivados de esta familia se han sintetizado recientemente   y se encuentran en la etapa de estudios precl&iacute;nicos, tales como:   (+/-)-5-{[4-[2-(metil-2-piridilamino) etoxi] fenil] metil} 2,4 tiazolidinadiona   (BRL 49653),<SUP>39,40</SUP> (+/-)-5-{4-[2-(5-metil-2-fenil-4-oxazolil)   etoxi]bencil} 2,4 tiazolidinadiona (BM 13.1246) y (+/-)-5-{4-[2-(5-metil-2-fenil-4-oxazolil)   etoxi] naftalil}metil 2,4 tiazolidinadiona (BM 50.1050).<SUP>41</SUP>   <H4>   CONSIDERACIONES FINALES</H4>   Las tiazolidinadionas es una nueva familia de hipoglicemiantes orales,   conocida como sensibilizadores de insulina, ya que su acci&oacute;n farmacol&oacute;gica   est&aacute; dirigida a mejorar la acci&oacute;n de la insulina mediante   mecanismos extrapancre&aacute;ticos. Con estos compuestos se logra disminuir   la hiperglicemia y la insulino-resistencia en los pacientes diab&eacute;ticos   no insulino-dependientes. Por ello la investigaci&oacute;n y desarrollo   en este campo con vistas a lograr nuevos derivados con una mayor efectividad   y un menor n&uacute;mero de efectos colaterales, constituye actualmente   uno de los objetivos principales de varias compa&ntilde;&iacute;as farmac&eacute;uticas.   Consideramos que este trabajo pueda motivar a diferentes especialistas   de la salud, vinculados con esta tem&aacute;tica, a profundizar en el estudio   y aplicaci&oacute;n de dichos compuestos.   <H4>   SUMMARY</H4>   A bibliographic review of a new series of compunds known as thiazolidinediones   is made from a study of the most current and up-dated literature. Databases   such as MEDLINE (1989-8/96), Excerpta Medica (1990-7/96), Predicast (1992-6/96),   Medical Research Division (1991) and Life Science (1993-95) were consulted.   Results obtained from preclinical and clinical trials of the derivates   of this family known up to the present, are reported.          <P><I>Subject headings</I>: THIAZOLES/pharmacology; INSULIN/physiology;   HY-PERGLYCEMIA/physiopathology; HYPERINSULINISM/physiopathology; HYPERTRIGLICERIDEMIA/physiopathology;   DIABETES MELLITUS; NON-INSULIN-DEPENDENT; GLUCOSE TOLERANCE TEST; DISEASE   MODELS, ANIMALS.   <H4>   REFERENCIAS BIBLIOGR&Aacute;FICAS</H4>      <OL>       <!-- ref --><LI>   <FONT SIZE=-1>Gerich JE. Oral hypoglycemic agents. New Engl J Med 1989;321(18):1231-45.</FONT></LI>    <!-- ref --><LI>   <FONT SIZE=-1>Lo Presti R, D'Asaro S, Caimi G. Nuovi ipoglicemizzanti orali.   Diabetol 1989;9:363-74.</FONT></LI>    <!-- ref --><LI>   <FONT SIZE=-1>Lefebvre PJ, Scheen AJ. Improving the action of insulin.   Clin Inv Med 1995;18(4):340-7.</FONT></LI>    <!-- ref --><LI>   <FONT SIZE=-1>Sohda T, Mizuno K, Tawada H, Sugiyama Y, Fujita T, Kawamatsu   Y. 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