<?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>S1025-028X2001000200003</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estudio serológico y de protección en ratones utilizando diferentes esquemas y dosis de VA-MENGOC-BC®]]></article-title>
<article-title xml:lang="en"><![CDATA[Serological and Protection Study in Mice using different vaccination schemes and Doses of VA-MENGOC-BC® Vaccine]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Infante]]></surname>
<given-names><![CDATA[Juan F]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mayo]]></surname>
<given-names><![CDATA[Jorge E]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sifontes]]></surname>
<given-names><![CDATA[Sergio]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pedroso]]></surname>
<given-names><![CDATA[Eslie]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Muñoz]]></surname>
<given-names><![CDATA[Enrique]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fariñas]]></surname>
<given-names><![CDATA[Mildrey]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gutiérrez]]></surname>
<given-names><![CDATA[Mercedes]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ochoa]]></surname>
<given-names><![CDATA[Rolando]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[Juan C]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Annet]]></surname>
<given-names><![CDATA[Aida]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Camaraza]]></surname>
<given-names><![CDATA[María A]]></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>
<country>Cuba</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Centro de Bioactivos Químicos  ]]></institution>
<addr-line><![CDATA[Santa Clara ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2001</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2001</year>
</pub-date>
<volume>10</volume>
<numero>2</numero>
<fpage>13</fpage>
<lpage>18</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S1025-028X2001000200003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S1025-028X2001000200003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S1025-028X2001000200003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[La alta incidencia mundial de meningitis meningocócica por Neisseria meningitidis serogrupo B (N. meningitidis) movilizó los recursos de la ciencia hacia su enfrentamiento en un período corto de tiempo. Para el estudio de esta enfermedad fue imprescindible desarrollar modelos experimentales que posibilitaran caracterizar no sólo la capacidad inmunogénica y protectora de los candidatos vacunales, sino también la toxigenicidad del producto. El estudio basado en el modelo ratón Balb/c con la utilización de factores estimulantes de la virulencia, posibilitó el desarrollo experimental de la enfermedad. Consistió en la aplicación de diferentes esquemas de dosis y diluciones de la vacuna (1/2, 1/4, 1/8, 1/16) en solución salina fisiológica 0,85%. Se conformaron 15 grupos de ocho animales cada uno que previamente recibieron Dextrana Férrica (IMEFA) y mucina gástrica de cerdo 8% en un volumen total de 0,4 mL, y un grupo control al que le fue administrada la vacuna pura. Se empleó para el reto la cepa 385 de N. meningitidis con una concentración del inóculo de 107 UFC/mL. El esquema de vacunación contempló grupos vacunados con 1, 2, y 3 dosis a los 0,15 y 30 días. Se administraron 0,2 mL del inóculo de N. meningitidis por vía intraperitoneal. Se determinó la dosis letal media (DL50), anticuerpos bactericidas, respuesta serológica por el método de ELISA y se calculó la protección conferida. Se aplicó el método de Log rank para la comparación de los tiempos de sobrevivencia y para el ensayo de ELISA se aplicó el método de superficie ajustada por SPLINE. Hemos demostrado la utilidad del biomodelo ratón Balb/c para comprobar la eficacia de la vacuna VA-MENGOC-BC®. Quedó demostrada la correlación entre los niveles de anticuerpos y la protección conferida por la vacuna, comprobándose además por los ensayos de reto. Se logró obtener una aproximación con respecto a los límites de eficacia de VA-MENGOC-BC® mediante diluciones consecutivas del producto en la línea de ratones Balb/c.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[The elevated world incidence of meningococcal meningitis due to Neisseria meningitidis B (N. meningitidis) has mobilized scientists in the search for a speedy solution to this problem. In order to study this disease, it is indispensable to develop experimental models which will enable the characterization of, not only the immunogenic and protective capability of vaccine candidates, but also the possible toxicity of the preparation. Consequently, a Balb/c mouse model was used, together with virulence stimulating factors, in order to achieve the experimental development of the disease. Different vaccine dose schedules and dilutions were used (1/2,1/4,1/8,1/16) in 0,85% physiologic saline solution. Fifteen groups of 8 animals each, which had previously received Ferric Dextran (IMEFA) and swine gastric mucin (8%) in a total volume of 0,4 mL and a control group which received the pure vaccine were formed. N. meningitidis Strain 385, was used for the challenge, with an inoculum concentration of 107 UFC/mL. The following vaccination schedule was observed: the groups of animals were vaccinated with 1, 2 and 3 doses on days: 0, 15 and 30. A total of 0,2 mL of the N. meningitidis inoculum was administered intraperitoneally. The half lethal dose (LD 50), bactericidal antibodies and serological response using an ELISA assay were determined and the protection conferred by the prepartions were calculated. The Log rank method was used for comparing survival time. The SPLINE surface adjustment method was used in the case of the ELISA assay. The usefulness of the Balb/c mouse biomodel for comparing the efficacy of the VA-MENGOC-BC® vaccine was demonstrated. The correlation between the different levels of antibodies and the protection conferred by the vaccine was demonstrated and verified by challenge assays. An approximation of the efficacy limit of VA-MENGOC-BC® was obtained by means of consecutive dilutions of the product in the Balb/c mouse line.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Neisseria meningitidis B]]></kwd>
<kwd lng="en"><![CDATA[VA-MENGOC-BC®]]></kwd>
<kwd lng="en"><![CDATA[ratón]]></kwd>
<kwd lng="en"><![CDATA[protección]]></kwd>
<kwd lng="en"><![CDATA[Neisseria meningitidis B]]></kwd>
<kwd lng="en"><![CDATA[VA-MENGOC-BC®]]></kwd>
<kwd lng="en"><![CDATA[mouse]]></kwd>
<kwd lng="en"><![CDATA[protection]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="right"><font face="Verdana" size="2"><b><font face="Verdana, Arial, Helvetica, sans-serif">ARTICULOS ORIGINALES</font></b></font></p>     <p align="right">&nbsp;</p>     <p align="right"><font size="4" face="Verdana, Arial, Helvetica, sans-serif"><strong>Estudio serol&oacute;gico y de protecci&oacute;n en ratones utilizando  diferentes esquemas y dosis de VA-MENGOC-BC&reg;</strong></font></p>     <p align="right">&nbsp;</p>     <p align="right"><strong><font size="3" face="Verdana, Arial, Helvetica, sans-serif">Serological and Protection Study in Mice using different vaccination schemes and Doses of VA-MENGOC-BC&reg; Vaccine.    <br> </font></strong></p>     <p>&nbsp;</p>     <p><strong><font size="2" face="Verdana, Arial, Helvetica, sans-serif">Juan F. Infante1, Jorge E. Mayo1, Sergio Sifontes2, Eslie Pedroso1, Enrique Mu&ntilde;oz1, Mildrey Fari&ntilde;as1,     Mercedes Guti&eacute;rrez1, Rolando Ochoa1, Juan C. Mart&iacute;nez1, Aida Annet1, Mar&iacute;a A.Camaraza1.    <br> </font></strong></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">1. Instituto Finlay. Centro de Investigaci&oacute;n-Producci&oacute;n de Vacunas y Sueros. Ciudad de La Habana, Cuba.    ]]></body>
<body><![CDATA[<br>   E-mail:<a href="mailto:jinfante@finlay.edu.cu">jinfante@finlay.edu.cu</a>    <br> </font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">2. Centro de Bioactivos Qu&iacute;micos Universidad Central de Las Villas, Santa Clara, Cuba.</font></p> <hr>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><strong>RESUMEN</strong>    <br> </font></p>     <p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">La alta incidencia mundial de meningitis meningoc&oacute;cica por Neisseria meningitidis serogrupo B (N. meningitidis)    moviliz&oacute; los recursos de la ciencia hacia su enfrentamiento en un per&iacute;odo corto de tiempo. Para el estudio de    esta enfermedad fue imprescindible desarrollar modelos experimentales que posibilitaran caracterizar no s&oacute;lo la    capacidad inmunog&eacute;nica y protectora de los candidatos vacunales, sino tambi&eacute;n la toxigenicidad del producto.   El estudio basado en el modelo rat&oacute;n Balb/c con la utilizaci&oacute;n de factores estimulantes de la virulencia, posibilit&oacute;    el desarrollo experimental de la enfermedad. Consisti&oacute; en la aplicaci&oacute;n de diferentes esquemas de dosis y    diluciones de la vacuna (1/2, 1/4, 1/8, 1/16) en soluci&oacute;n salina fisiol&oacute;gica 0,85%. Se conformaron 15 grupos de    ocho animales cada uno que previamente recibieron Dextrana F&eacute;rrica (IMEFA) y mucina g&aacute;strica de cerdo 8%    en un volumen total de 0,4 mL, y un grupo control al que le fue administrada la vacuna pura. Se emple&oacute; para el    reto la cepa 385 de N. meningitidis con una concentraci&oacute;n del in&oacute;culo de 107 UFC/mL. El esquema de    vacunaci&oacute;n contempl&oacute; grupos vacunados con 1, 2, y 3 dosis a los 0,15 y 30 d&iacute;as. Se administraron 0,2 mL del    <br>   in&oacute;culo de N. meningitidis por v&iacute;a intraperitoneal. Se determin&oacute; la dosis letal media (DL50), anticuerpos    bactericidas, respuesta serol&oacute;gica por el m&eacute;todo de ELISA y se calcul&oacute; la protecci&oacute;n conferida. Se aplic&oacute; el    m&eacute;todo de Log rank para la comparaci&oacute;n de los tiempos de sobrevivencia y para el ensayo de ELISA se aplic&oacute;    el m&eacute;todo de superficie ajustada por SPLINE. Hemos demostrado la utilidad del biomodelo rat&oacute;n Balb/c para    comprobar la eficacia de la vacuna VA-MENGOC-BC&reg;. Qued&oacute; demostrada la correlaci&oacute;n entre los niveles de    anticuerpos y la protecci&oacute;n conferida por la vacuna, comprob&aacute;ndose adem&aacute;s por los ensayos de reto. Se logr&oacute;    obtener una aproximaci&oacute;n con respecto a los l&iacute;mites de eficacia de VA-MENGOC-BC&reg; mediante diluciones    consecutivas del producto en la l&iacute;nea de ratones Balb/c.    <br> </font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><strong>Palabras claves: </strong>Neisseria meningitidis B, VA-MENGOC-BC&reg;, rat&oacute;n, protecci&oacute;n.</font></p> <hr>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif">  <strong>ABSTRACT</strong></font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">  The elevated world incidence of meningococcal meningitis due to Neisseria meningitidis B (N. meningitidis) has mobilized    scientists in the search for a speedy solution to this problem. In order to study this disease, it is indispensable to develop    experimental models which will enable the characterization of, not only the immunogenic and protective capability of    vaccine candidates, but also the possible toxicity of the preparation. Consequently, a Balb/c mouse model was used,   together with virulence stimulating factors, in order to achieve the experimental development of the disease. Different    vaccine dose schedules and dilutions were used (1/2,1/4,1/8,1/16) in 0,85% physiologic saline solution. Fifteen groups of    8 animals each, which had previously received Ferric Dextran (IMEFA) and swine gastric mucin (8%) in a total volume of    0,4 mL and a control group which received the pure vaccine were formed. N. meningitidis Strain 385, was used for the    challenge, with an inoculum concentration of 107 UFC/mL. The following vaccination schedule was observed: the groups    <br>   of animals were vaccinated with 1, 2 and 3 doses on days: 0, 15 and 30. A total of 0,2 mL of the N. meningitidis    <br>   inoculum was administered intraperitoneally. The half lethal dose (LD 50), bactericidal antibodies and serological    <br>   response using an ELISA assay were determined and the protection conferred by the prepartions were calculated. The    Log rank method was used for comparing survival time. The SPLINE surface adjustment method was used in the case of    the ELISA assay. The usefulness of the Balb/c mouse biomodel for comparing the efficacy of the VA-MENGOC-BC&reg;    vaccine was demonstrated. The correlation between the different levels of antibodies and the protection conferred by the    vaccine was demonstrated and verified by challenge assays. An approximation of the efficacy limit of VA-MENGOC-BC&reg;    was obtained by means of consecutive dilutions of the product in the Balb/c mouse line.    <br> </font></p>     <p><font size="2" face="Verdana, Arial, Helvetica, sans-serif"><strong>Keywords:</strong> Neisseria meningitidis B, VA-MENGOC-BC&reg;, mouse, protection.</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. Dlawer A, Ala`Aldeen A. Vacccines against Neisseria meningitidis: A post, present and future. Biotecnolog&iacute;a Aplicada 1996; 13:1-7. </font>     <!-- ref --><P ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">2. Frasch C E, Tsai C M. Mocca L F. Outer membrane proteins of Neisseria Meningitidis: Structure and importance in meningococcal disease: Clin Invest Med 1986; (9):101-107. </font>     <!-- ref --><P ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">3. Infante JF, Sierra GV, Campa HC, Acosta A, Azahares E, P&eacute;rez V, Mu&ntilde;oz E, et al. Las Ratas SPF como modelo experimental para la enfermedad meningoc&oacute;cica y la evaluaci&oacute;n de la efectividad de VA-MENGOC-BC . II. Estudio microbiol&oacute;gico e inmunol&oacute;gico. VacciMonitor 1997; 6 (7):2-6. </font>     <!-- ref --><P ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">4. Sifontes, R,S, Infante,BJ F, Cap&oacute; V, Marrero O, Azahares E, Mu&ntilde;oz E, Sierra G, Campa C: Experimental infection by Haemophilus influenzae type b in inbred mice. Arch Med Res. 1996; 27(2):133-8. </font>     <!-- ref --><P ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">5. Sotolongo P.F. Aspectos te&oacute;rico-Pr&aacute;cticos sobre el diagn&oacute;stico, clasificaci&oacute;n y valoraci&oacute;n de la respuesta inmune. Ciudad de la Habana: Ediones Finlay; 1995. </font>     <!-- ref --><P ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">6. Sifontes RS, Infante BJF, P&eacute;rez RP, Caro AE, Sierra GG, Campa HC. The hyperferremic mouse model for the evaluation of the effectiveness of VA-MENGOC-BC&#174; against Neisseria meningitidis B clinical isolates. Arch Med Res 1997; 28(1):55-60. </font>     <!-- ref --><P ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">7. Aleksakhnina N, Basnak`ian IA, Kolenko VM, Borovkova VM, Saraeva LV, Stukalova NV, et al. The antibody response of animals to a corpuscular meningococcal group B preparation with different methods of immunization. Zh Mikrobiol Epidemiol Immunobiol 1992; (7-8):30-4. </font>     <!-- ref --><P ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">8. Abbas AK, Lichtman AH, Pober JS. Inmunidad frente a los microorganismos. En: Inmunolog&iacute;a Celular y Molecular. 2da ed. Espa&ntilde;a, Madrid: Interamericana Mc Graw Hill; 1995; 369-376. </font>     <!-- ref --><P ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">9. Devi Sj, Zollinger WD, Snoy PJ, Tsai JY Costantini P, Norelli F, Rappuoli R, Frasch CE. Preclinical evaluation of group B Neisseria meningitidis and Escherichia coli K92 capsular polysaccharide- protein conjugate vaccines in juvenile rhesus monkey. Infect Immun 1997; 65(3):1045-52. </font>     <!-- ref --><P ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">10. Gu XX, Tsai CM. Preparation, characterization, and immunogenicity of meningococcal lipooligosaccharidederived oligosaccharide-protein conjugate. Infect Immun. 1993;61(5):1873-80. </font>     <!-- ref --><P ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">11. Vella PP, Marburg S, Staub JM, Kniskern PJ, Miller W, Hagopian A et al. Immunogenicity of conjugate vaccines consisting of pneumococcal capsular polysaccharide types 6B, 14, 19F, and 23F and a meningococcal outer membrane protein complex Infect Immun 1992; 60(12):4977-83. </font>     <!-- ref --><P ALIGN="JUSTIFY"><font size="2" face="Verdana, Arial, Helvetica, sans-serif">12. Lastre M, Batista A, Sierra G, P&eacute;rez O. 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Bactericidal antibody responses of juvenile rherus monkeys immunized with group B Neisseria meningitidis capsular polysaccharide-protein conjugate Vaccines. Infect Immun 1997;65(3):1053-60. </font>     <p>&nbsp; </p>      ]]></body><back>
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