<?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>0120-0011</journal-id>
<journal-title><![CDATA[Revista de la Facultad de Medicina]]></journal-title>
<abbrev-journal-title><![CDATA[rev.fac.med.]]></abbrev-journal-title>
<issn>0120-0011</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-00112020000100130</article-id>
<article-id pub-id-type="doi">10.15446/revfacmed.v68n1.72108</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Oral tolerance induction in organ and tissue transplantation. Literature review]]></article-title>
<article-title xml:lang="es"><![CDATA[Inducción de tolerancia por vía oral en trasplante de órganos y tejidos. Revisión de la Literatura]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rivillas-Reyes]]></surname>
<given-names><![CDATA[Juan Felipe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Duran]]></surname>
<given-names><![CDATA[Erwin Felipe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Morales-Manrique]]></surname>
<given-names><![CDATA[Jessica Liliana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rivillas]]></surname>
<given-names><![CDATA[María Paula]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lozano-Marquez]]></surname>
<given-names><![CDATA[Harvey]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lozano-Marquez]]></surname>
<given-names><![CDATA[Eyner]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Colombia Faculty of Medicine Department of Morphology]]></institution>
<addr-line><![CDATA[Bogotá D.C ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional de Colombia Faculty of Veterinary Medicine and Zootechnics ]]></institution>
<addr-line><![CDATA[Bogotá D.C ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2020</year>
</pub-date>
<volume>68</volume>
<numero>1</numero>
<fpage>130</fpage>
<lpage>142</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-00112020000100130&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-00112020000100130&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-00112020000100130&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: Oral tolerance is defined as the suppression of the immune response to antigens that have been previously administered orally. The purpose of inducing oral tolerance is to avoid using immunosuppressive drugs since, considering that they are not antigen-specific, they make the host more susceptible to acquire infections and develop neoplasms.  Objective: To carry out a literature review on the most relevant theoretical references regarding oral tolerance induction in organ and tissue transplantation to prove that oral tolerance is a viable alternative therapy in transplant patients.  Materials and methods: A literature review was conducted in the PubMed, MEDLINE, LILACS and Embase databases using the following search strategy: publication time: no limits; publication language: English and Spanish; type of studies: case-control studies, literature and systematic reviews; search terms: "T-Lymphocytes, Regulatory", "Autoimmunity", Immunosuppression", "Immune system" and "Immune Tolerance", and their equivalents in Spanish.  Results: After the initial search was completed, 719 records were retrieved; however, only 99 addressed oral tolerance induction. Once duplicate records and articles without full-text access were removed, 75 studies were included for analysis.  Conclusions: Oral administration of antigens is an effective way to induce immune tolerance in transplant patients (murine models) as it eliminates the adverse effects associated with immunosuppressive therapy, which currently is the standard therapy to treat these patients worldwide.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción. La tolerancia oral es la supresión de la respuesta inmune a antígenos administrados con anterioridad por vía oral; su inducción tiene el propósito de evitar el uso de fármacos inmunosupresores, los cuales, dado que son poco específicos a antígenos, vuelven al huésped más susceptible de contraer infecciones y desarrollar neoplasias.  Objetivos. Realizar una revisión de la literatura sobre los referentes teóricos más relevantes de la inducción de a tolerancia oral en lo que respecta al trasplante de órganos y tejidos para demostrar que el uso de esta alternativa terapéutica es viable en pacientes trasplantados.  Materiales y métodos. Se realizó una revisión de la literatura en PubMed, MEDLINE, LILACS y Embase mediante la siguiente estrategia de búsqueda: periodo de publicación: sin límites; idiomas: Inglés y Español; tipo de artículos: estudios caso-control, revisiones sistemáticas y de la literatura; términos de búsqueda: "T-Lymphocytes, Regulatory", "Autoimmunity", Immunosuppression", "Immune system" and "Immune Tolerance", y sus equivalentes en español.  Resultados. La búsqueda inicial arrojó 719 registros, sin embargo solo 99 abordaban la inducción de la tolerancia oral. Una vez los registros duplicados y los artículos sin acceso a texto completo fueron removidos, se incluyeron 72 estudios en la revisión.  Conclusiones. La administración oral de antígenos es una opción efectiva para inducir tolerancia inmunológica en pacientes trasplantados (modelos murinos), pues elimina los efectos adversos que conlleva la terapia inmunosupresora actualmente utilizada.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[T-Lymphocytes, Regulatory]]></kwd>
<kwd lng="en"><![CDATA[Autoimmunity]]></kwd>
<kwd lng="en"><![CDATA[Immunosuppression]]></kwd>
<kwd lng="en"><![CDATA[Immune System]]></kwd>
<kwd lng="en"><![CDATA[Immune Tolerance (MeSH)]]></kwd>
<kwd lng="es"><![CDATA[Linfocitos T reguladores]]></kwd>
<kwd lng="es"><![CDATA[Autoinmunidad]]></kwd>
<kwd lng="es"><![CDATA[Inmunosupresión]]></kwd>
<kwd lng="es"><![CDATA[Sistema inmune]]></kwd>
<kwd lng="es"><![CDATA[Tolerancia inmunológica (DeCS)]]></kwd>
</kwd-group>
</article-meta>
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