<?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>1025-028X</journal-id>
<journal-title><![CDATA[Vaccimonitor]]></journal-title>
<abbrev-journal-title><![CDATA[Vaccimonitor]]></abbrev-journal-title>
<issn>1025-028X</issn>
<publisher>
<publisher-name><![CDATA[Finlay Ediciones]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1025-028X2000000100005</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Influencia del pH sobre la estabilidad de preparados de inmunoglobulinas intravenosas para uso humano durante el almacenamiento]]></article-title>
<article-title xml:lang="en"><![CDATA[The influence of pH in the stability during the storage of intravenous immunoglobulins for human use]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cádiz]]></surname>
<given-names><![CDATA[Armando]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castellano]]></surname>
<given-names><![CDATA[Ma Esther]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández]]></surname>
<given-names><![CDATA[Janhna]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castillo]]></surname>
<given-names><![CDATA[J.R]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mustelier]]></surname>
<given-names><![CDATA[Pavel]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez]]></surname>
<given-names><![CDATA[Ana Teresa]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Instituto Finlay  ]]></institution>
<addr-line><![CDATA[Ciudad de La Habana ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2000</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2000</year>
</pub-date>
<volume>9</volume>
<numero>1</numero>
<fpage>21</fpage>
<lpage>25</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S1025-028X2000000100005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S1025-028X2000000100005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S1025-028X2000000100005&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[La eliminación o disociación de los agregados de IgG, es uno de los requisitos que debe poseer cualquier método de purificación de inmunoglobulinas para uso intravenoso. Se demostró con el uso de la Cromatografía en Gel y la Espectrofotometría, que el pH ácido (4,5), confiere una mayor estabilidad molecular a la IgG, permitiendo la disociación de la mayor parte de los agregados durante el almacenamiento prolongado utilizando dextrosa (5%) como estabilizante, fenómeno que está influido por la fuerza iónica del medio para cada uno de los pH. Muestras con contenido de polímeros entre 1% y 3% pierden los mismos en un período inferior a los seis meses. A su vez el uso de pH 4,0, mostró ventajas en la no formación de polímeros durante el calentamiento, en comparación con los pH más básicos. A los 5 minutos de calentamiento, la absorvancia de la muestra a pH 7,0, aumentó en un 60% en comparación con la muestra a pH 4,0.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[One of the most important requirements that all methods of protein purification for intravenous use must fulfil is the elimination or dissociation of the immunoglobulin aggregates. The use of gel filtration and espectrophotometric techniques showed that acid pH (4.5), gives greater molecular stability to the IgG, dissociating most of the aggregates during lengthy storage using dextrose (5%) as stabilizer, this fact is influenced by the ionic strength of the medium for each pH. Samples with polymers (1-3%) lose them in 6 months. At the same time the use of pH 4.0 showed advantages as the non formation of polymers during the heat of the immunoglobulins, as compared to more basic pH. After 5 minutes of heating the sample at pH 7.0 the absorbance increased in 60% in comparison with the sample at pH 4.0.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Inmunoglobulinas intravenosas]]></kwd>
<kwd lng="es"><![CDATA[agregados]]></kwd>
<kwd lng="es"><![CDATA[polímeros]]></kwd>
<kwd lng="es"><![CDATA[dímeros]]></kwd>
<kwd lng="es"><![CDATA[monómeros]]></kwd>
<kwd lng="es"><![CDATA[almacenamiento]]></kwd>
<kwd lng="es"><![CDATA[calentamiento]]></kwd>
<kwd lng="es"><![CDATA[estabilizantes]]></kwd>
<kwd lng="en"><![CDATA[Intravenous immunoglobulins]]></kwd>
<kwd lng="en"><![CDATA[aggregates]]></kwd>
<kwd lng="en"><![CDATA[polymers]]></kwd>
<kwd lng="en"><![CDATA[dimers]]></kwd>
<kwd lng="en"><![CDATA[monomers]]></kwd>
<kwd lng="en"><![CDATA[storage]]></kwd>
<kwd lng="en"><![CDATA[heating]]></kwd>
<kwd lng="en"><![CDATA[stability]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="right"><font face="Verdana, Arial, Helvetica, sans-serif" size="2"><b>ARTICULOS ORIGINALES</b></font></p>     <p align="right">&nbsp;</p>     <p align="right"><font size="4" face="Verdana, Arial, Helvetica, sans-serif"><strong>Influencia del pH sobre la estabilidad de preparados de Inmunoglobulinas  intravenosas para uso humano durante el almacenamiento.</strong></font></p>     <p>&nbsp;</p>     <p align="right"><font size="3" face="Verdana, Arial, Helvetica, sans-serif"><strong>The influence of pH in the stability during the storage of intravenous immunoglobulins for human use.</strong></font></p>     <p>&nbsp;</p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><strong>Armando C&aacute;diz, Ma Esther Castellano, Janhna Hern&aacute;ndez, J.R. Castillo, Pavel Mustelier, Ana Teresa Ram&iacute;rez.    <br> </strong></font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Instituto Finlay. Centro de Investigaci&oacute;n-Producci&oacute;n de Vacunas y Sueros. Ciudad de La Habana, Cuba.E-mail: <a href="emailto:acadiz@finlay.edu.cu">acadiz@finlay.edu.cu</a></font></p> <hr>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><strong>RESUMEN</strong></font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La eliminaci&oacute;n o disociaci&oacute;n de los agregados de IgG, es uno de los requisitos que debe poseer cualquier m&eacute;todo de    purificaci&oacute;n de inmunoglobulinas para uso intravenoso. Se demostr&oacute; con el uso de la Cromatograf&iacute;a en Gel y la    Espectrofotometr&iacute;a, que el pH &aacute;cido (4,5), confiere una mayor estabilidad molecular a la IgG, permitiendo la disociaci&oacute;n de la    mayor parte de los agregados durante el almacenamiento prolongado utilizando dextrosa (5%) como estabilizante,   fen&oacute;meno que est&aacute; influido por la fuerza i&oacute;nica del medio para cada uno de los pH. Muestras con contenido de pol&iacute;meros    entre 1% y 3% pierden los mismos en un per&iacute;odo inferior a los seis meses. A su vez el uso de pH 4,0, mostr&oacute; ventajas en la    no formaci&oacute;n de pol&iacute;meros durante el calentamiento, en comparaci&oacute;n con los pH m&aacute;s b&aacute;sicos. A los 5 minutos de    calentamiento, la absorvancia de la muestra a pH 7,0, aument&oacute; en un 60% en comparaci&oacute;n con la muestra a pH 4,0.    <br> </font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><strong>Palabras claves:</strong> Inmunoglobulinas intravenosas, agregados, pol&iacute;meros, d&iacute;meros, mon&oacute;meros, almacenamiento, calentamiento, estabilizantes.</font></p> <hr>     <p>  <font size="2" face="Verdana, Arial, Helvetica, sans-serif"><strong>ABSTRACT</strong></font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"> One of the most important requirements that all methods of protein purification for intravenous use must fulfil is the elimination or    dissociation of the immunoglobulin aggregates. The use of gel filtration and espectrophotometric techniques showed that acid pH    (4.5), gives greater molecular stability to the IgG, dissociating most of the aggregates during lengthy storage using dextrose (5%) as    stabilizer, this fact is influenced by the ionic strength of the medium for each pH. Samples with polymers (1&ndash;3%) lose them in 6    months. At the same time the use of pH 4.0 showed advantages as the non formation of polymers during the heat of the    immunoglobulins, as compared to more basic pH. After 5 minutes of heating the sample at pH 7.0 the absorbance increased in 60%  in comparison with the sample at pH 4.0.</font></p>     <p>  <font size="2" face="Verdana, Arial, Helvetica, sans-serif"><strong>Key words:</strong> Intravenous immunoglobulins, aggregates, polymers, dimers, monomers, storage, heating, stability</font></p> <hr>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">texto completo en pdf</font></p>     <P  ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><B>REFERENCIAS</B> </font>     <!-- ref --><P ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">1. Ishizaka T, Ishizaka K. Biological activities of aggregated gammaglobulin. 1. Skin reactive and complement-fixing properties of heat denatured gammaglobulin. <I>Proc. Soc</I>. Exp. <I>Biol. Med</I>. 1959;101:845-50. </font>    <!-- ref --><P ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">2. Bing D. Complement interaction with immune serum globulin intravenous. <I>The Amer. J. of Med</I>. 1984; 76(3A):19-24. </font>    <!-- ref --><P ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">3. Lundblad J, Schroeder D. M&eacute;todos de producci&oacute;n de IGIV y an&aacute;lisis de los preparados comerciales<I>. En: </I>Aplicaciones cl&iacute;nicas del tratamiento con inmunoglobulinas intravenosas. Yap PL. Barcelona: Editorial J. R. Prous S.A. 1993:15-36. </font>    <!-- ref --><P ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">4. Henney C, Ellis E. Antibody production to aggregated human gamma G globulin in acquired hypogammaglobulinemia. <I>New Engl. J. Med. </I>1968; 278:1144-46. </font>    <!-- ref --><P ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">5. Yap P, Williams P. Perfil de seguridad de las inmunoglobulinas intravenosas. En: <I>Aplicaciones cl&iacute;nicas del tratamiento con inmunoglobulinas intravenosas</I>. Yap PL. Barcelona: Editorial J. R. Prous S. A. 1993;37-56. </font>    <P ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">6. Organizaci&oacute;n Mundial de la Salud. <I>Normas para la toma, la preparaci&oacute;n y el control de calidad de la sangre, los componentes sangu&iacute;neos y los derivados del plasma. </I>Ginebra, 1992; (27):91-6. (Serie Informes T&eacute;cnicos; No 840). </font>     <!-- ref --><P ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">7. Hannson V. Inhibition and reversal of aggregation of IgG by freezing. <I>Acta Chem. Scand</I>. 1968;22:490-6. </font>    <!-- ref --><P ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">8. Uemura Y., Uriyu K., Hirao Y, Takechi K, Ishikawa H, Nakajima T. Inactivation and elimination of viruses during the fraccionation of an intravenous immunoglobulins preparation Liquid heat treatment and PEG fractionation. <I>Vox San. </I>1989;56:155-61. </font>    <!-- ref --><P ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">9. Eibl M, Wedgwood R. Intravenous immunolgobulin:<I> A review on immunodeficiencies</I>. En: Rosen F., Seligman M. eds. <I>Harwood Academic Pubs. </I>Switzerland, 1993;659. </font>    <!-- ref --><P ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">10. Thorpe R, Brasher M, Tarelli E, Dilger P, Page M. An&aacute;lisis de laboratorio de los preparados de inmunoglobulinas intravenosas. En: Aplicaciones cl&iacute;nicas del tratamiento con inmunoglobulinas intravenosas. Yap PL, ed. J.R. Prous Barcelona, 1993;239-48. </font>    <!-- ref --><P ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">11.     Perry RI. 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