<?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>S0120-00112021000300203</article-id>
<article-id pub-id-type="doi">10.15446/revfacmed.v69n3.80142</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Effect of neural therapy on NGF and BDNF serum levels in patients with chronic pain. A pilot study]]></article-title>
<article-title xml:lang="es"><![CDATA[Efecto de la terapia neural sobre los niveles séricos del NGF y el BDNF en pacientes con dolor crónico. Estudio piloto]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Garzón]]></surname>
<given-names><![CDATA[Carolina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Caminos]]></surname>
<given-names><![CDATA[Jorge Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alzate]]></surname>
<given-names><![CDATA[Juan Pablo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Eslava-Schmalbach]]></surname>
<given-names><![CDATA[Javier Hernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Garcés]]></surname>
<given-names><![CDATA[María Fernanda]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Beltrán-Dussan]]></surname>
<given-names><![CDATA[Eduardo Humberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Colombia Faculty of Medicine ]]></institution>
<addr-line><![CDATA[Bogotá D.C. ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional de Colombia Faculty of Medicine Department of Physiological Sciences]]></institution>
<addr-line><![CDATA[Bogotá D.C. ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional de Colombia Faculty of Medicine Department of Public Health]]></institution>
<addr-line><![CDATA[Bogotá D.C. ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Nacional de Colombia Faculty of Medicine Department of Surgery]]></institution>
<addr-line><![CDATA[Bogotá D.C. ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad Nacional de Colombia Faculty of Medicine ]]></institution>
<addr-line><![CDATA[Bogotá D.C. ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2021</year>
</pub-date>
<volume>69</volume>
<numero>3</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-00112021000300203&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-00112021000300203&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-00112021000300203&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: Neurotrophins (NT) are a family of proteins consisting of the nerve growth factor (NGF), the brain-derived neurotrophic factor (BDNF) and NT-3 and NT-4/5. These proteins play an essential role in neuronal survival, differentiation, and proliferation.  Objectives: To analyze the variations of NGF and BDNF serum levels in patients with chronic pain after undergoing neural therapy and to establish the effects of this type of intervention on their quality of life.  Materials and methods: Prospective pilot study conducted in 10 patients with chronic pain treated with neural therapy between July 2017 and April 2018 in Bogotá D.C., Colombia. Three consultations were performed (one in which the intervention was initiated, and two follow-up visits every three weeks). During each consultation, the patients' quality of life was assessed using the SF-12 scale and their NGF and BDNF serum levels were measured. Data were analyzed by means of descriptive statistics, using medians and interquartile ranges for quantitative variables, and absolute frequencies and percentages for qualitative variables.  Results: The median score on the SF-12 scale tended to improve in the first and second follow-up visits compared with the baseline score (pre-intervention), particularly during the first follow-up visit (consultation No. 1: 34.5; follow-up No. 1: 39.5, and follow-up No. 2: 38). Median NGF serum levels had a downward trend after the intervention, particularly in the first follow-up visit (157.6, 42.95, and 237.8, respectively), and in the case of BNDF, an overall downward trend was also found (29.96, 19.24 and 20.43, respectively). An improvement in quality of life related to the decrease in the serum levels of both neurotrophins was observed.  Conclusion: Neural therapy intervention reduced NGF and BDNF serum levels and improved the quality of life of the participants. Therefore, the behavior of these neurotrophins could become a biomarker for the diagnosis, treatment, and follow-up of patients with chronic pain.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción. Las neurotrofinas (NT) son una familia de proteínas conformada por el factor de crecimiento nervioso (NGF), el factor neurotrófico derivado del cerebro (BDNF) y las neurotrofinas NT-3 y NT-4/5; estas proteínas tienen un papel esencial en la supervivencia, diferenciación y proliferación neuronal.  Objetivos. Analizar las variaciones de los niveles séricos del NGF y el BDNF en pacientes con dolor crónico luego de recibir terapia neural y establecer los efectos de este tipo de intervención en su calidad de vida.  Materiales y métodos. Estudio piloto prospectivo realizado en 10 pacientes con dolor crónico tratados con terapia neural entre julio de 2017 y abril de 2018 en Bogotá D.C., Colombia. Se realizaron 3 consultas (una en la que se inició la intervención y dos de control cada tres semanas) y en cada una se evaluó la calidad de vida mediante el cuestionario de salud SF-12 y se midieron los niveles séricos del NGF y el BDNF. Los datos se analizaron mediante estadística descriptiva, utilizando medianas y rangos intercuartiles para las variables cuantitativas, y frecuencias absolutas y porcentajes para las cualitativas.  Resultados. La mediana de puntaje del cuestionario SF-12 tendió a mejorar en el primer y segundo control comparada con la puntuación inicial (antes de la intervención), en particular en el primer control (consulta 1: 34.5; control 1: 39.5, y control 2: 38). La mediana de los niveles séricos del NGF tendió a disminuir luego de la intervención, en particular en el primer control (157.6, 42.95 y 62.2, respectivamente), y en el caso del BNDF, la tendencia global también fue hacia la disminución (29.96, 19.24 y 20.43, respectivamente). Se observó una mejora en la calidad de vida relacionada con la disminución de los niveles séricos de ambas neurotrofinas.  Conclusión. La intervención de terapia neural produjo una reducción en los niveles séricos del NGF y el BDNF y mejoró la calidad de vida de los participantes; por tanto, el comportamiento de estas neurotro-finas podría convertirse en un biomarcador para el diagnóstico, tratamiento y seguimiento de pacientes con dolor crónico.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Nerve Growth Factors]]></kwd>
<kwd lng="en"><![CDATA[Pain Management]]></kwd>
<kwd lng="en"><![CDATA[Local Anesthetics]]></kwd>
<kwd lng="en"><![CDATA[Quality of Life]]></kwd>
<kwd lng="en"><![CDATA[Pain (MeSH)]]></kwd>
<kwd lng="es"><![CDATA[Factores de crecimiento nervioso]]></kwd>
<kwd lng="es"><![CDATA[Manejo del dolor]]></kwd>
<kwd lng="es"><![CDATA[Anestésicos locales]]></kwd>
<kwd lng="es"><![CDATA[Calidad de vida]]></kwd>
<kwd lng="es"><![CDATA[Dolor (DeCS)]]></kwd>
</kwd-group>
</article-meta>
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