<?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>0028-3746</journal-id>
<journal-title><![CDATA[Neumología y cirugía de tórax]]></journal-title>
<abbrev-journal-title><![CDATA[Neumol. cir. torax]]></abbrev-journal-title>
<issn>0028-3746</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Neumología y Cirugía de Tórax; Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas; Sociedad Cubana de Neumología; Sociedad Paraguaya de Neumología; Sociedad Boliviana de Neumología.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0028-37462023000300153</article-id>
<article-id pub-id-type="doi">10.35366/116814</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Niveles séricos de CD26 y marcadores fenotípicos de fibroblastos en pacientes con estenosis traqueal por intubación]]></article-title>
<article-title xml:lang="en"><![CDATA[Serum CD26 levels and fibroblast phenotypic markers in patients with tracheal stenosis secondary to orotracheal intubation]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Waldo-Hernández]]></surname>
<given-names><![CDATA[Luis Iván]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Iñiguez-García]]></surname>
<given-names><![CDATA[Marco Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Jiménez]]></surname>
<given-names><![CDATA[Claudia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Díaz-Martínez]]></surname>
<given-names><![CDATA[Néstor Emmanuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Baltazares-Lipp]]></surname>
<given-names><![CDATA[Matilde]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jasso-Victoria]]></surname>
<given-names><![CDATA[Rogelio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valencia-Sánchez]]></surname>
<given-names><![CDATA[Liliana Denisse]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Solares-Espinosa]]></surname>
<given-names><![CDATA[Andrea Gloria]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Enfermedades Respiratorias Ismael Cosío Villegas  ]]></institution>
<addr-line><![CDATA[Ciudad de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco Laboratorio de Reprogramación Celular y Bioingeniería de Tejidos ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Hospital Central «Dr. Ignacio Morones Prieto»  ]]></institution>
<addr-line><![CDATA[San Luis Potosí ]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2023</year>
</pub-date>
<volume>82</volume>
<numero>3</numero>
<fpage>153</fpage>
<lpage>161</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0028-37462023000300153&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0028-37462023000300153&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0028-37462023000300153&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Introducción: la estenosis traqueal secundaria a intubación orotraqueal es la causa más común de estenosis traqueal benigna. Es el resultado de una respuesta desregulada de cicatrización, proceso en el cual la dipeptidil peptidasa-4 (DPP-4 o CD26) se ha propuesto como una de las moléculas con posible papel regulatorio. El trabajo tiene por objetivo evaluar la relación entre los niveles séricos y la expresión tisular de CD26 con la estenosis traqueal secundaria a intubación orotraqueal y sus complicaciones, así como describir la expresión de miofibroblastos mediante inmunofluorescencia.  Material y métodos:  se realizó un estudio de casos y controles; se midieron niveles séricos y tisulares de CD26. Se compararon las características de los casos (pacientes con estenosis traqueal) versus controles (sanos), así como asociaciones entre DPP-4 sérica y las variables quirúrgicas (sangrado, complicaciones, tipo de anastomosis, etcétera); posteriormente, se realizó un modelo de regresión logística para evaluar la asociación de DPP-4-S y la presencia de estenosis traqueal secundaria a intubación orotraqueal. Además, de manera cualitativa, se evaluó la expresión de DPP-4 y miofibroblastos en tejido traqueal.  Resultados:  se analizaron 22 casos y 22 controles. En el análisis de los casos no se encontraron diferencias entre niveles de DPP-4-S prequirúrgicos y tres meses posquirúrgicos. En el análisis de regresión logística los niveles de DPP-4-S no mostraron una adecuada sensibilidad y especificidad para discriminar estenosis traqueal secundaria a intubación orotraqueal; la expresión de miofibroblastos en el tejido traqueal analizado por inmunofluorescencia reveló un aumento en la expresión de éstos.  Conclusiones:  bajo las condiciones de realización de este estudio, los niveles de DPP-4-S no discriminaron adecuadamente los casos de estenosis traqueal secundaria a intubación orotraqueal, aunque su expresión se encontró incrementada en tejido traqueal; y no se descarta que pueda fungir como blanco terapéutico en etapas tempranas de la estenosis traqueal secundaria a intubación orotraqueal o previo a su formación.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Introduction: orotracheal intubation stenosis (OTIS) is the most common cause of benign tracheal stenosis. It is the result of a deregulated healing response, a process in which dipeptidyl peptidase-4 (DPP-4 or CD26) has been proposed as one of the molecules with a possible regulatory role. This work aims to evaluate the relationship between serum levels and tissue expression of CD26 with OTIS and its complications, as well as to describe the expression of myofibroblasts by immunofluorescence.  Material and methods:  a case-control study was carried out; serum and tissue CD26 levels were measured. The characteristics of the cases (patients with tracheal stenosis) versus controls (healthy) were compared, as well as associations between serum DPP-4 and surgical variables (bleeding, complications, type of anastomosis, etc.); subsequently, a logistic regression model was performed to evaluate the association of DPP-4-S and the presence of OTIS. The expression of DPP-4 and myofibroblasts in tracheal tissue was also qualitatively evaluated.  Results:  22 cases and 22 controls were analyzed. In the analysis of the cases, no differences were found between pre-surgical and three months post-surgical DPP-4-S levels. In the logistic regression analysis, DPP-4-S levels did not show adequate sensitivity and specificity to discriminate OTIS; the expression of myofibroblasts in the tracheal tissue analyzed by immunofluorescence revealed an increase in their expression.  Conclusions:  under the conditions of this study, DPP-4-S levels did not adequately discriminate cases of OTIS, although its expression was found to increase in tracheal tissue, and it cannot be ruled out that it may serve as a therapeutic target in the early stages of tracheal stenosis secondary to orotracheal intubation or before its formation.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[estenosis traqueal]]></kwd>
<kwd lng="es"><![CDATA[CD26]]></kwd>
<kwd lng="es"><![CDATA[traqueoplastía]]></kwd>
<kwd lng="es"><![CDATA[DPP-4]]></kwd>
<kwd lng="es"><![CDATA[miofibroblastos]]></kwd>
<kwd lng="en"><![CDATA[tracheal stenosis]]></kwd>
<kwd lng="en"><![CDATA[CD26]]></kwd>
<kwd lng="en"><![CDATA[tracheoplasty]]></kwd>
<kwd lng="en"><![CDATA[DPP-4]]></kwd>
<kwd lng="en"><![CDATA[myofibroblasts]]></kwd>
</kwd-group>
</article-meta>
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