<?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>1665-1146</journal-id>
<journal-title><![CDATA[Boletín médico del Hospital Infantil de México]]></journal-title>
<abbrev-journal-title><![CDATA[Bol. Med. Hosp. Infant. Mex.]]></abbrev-journal-title>
<issn>1665-1146</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Salud, Hospital Infantil de México Federico Gómez]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1665-11462015000200099</article-id>
<article-id pub-id-type="doi">10.1016/j.bmhimx.2015.05.002</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Determinación de concentraciones séricas de 25(OH) D en niños con lupus eritematoso sistémico y artritis idiopática juvenil]]></article-title>
<article-title xml:lang="en"><![CDATA[Determination of 25(OH)D serum levels in children with systemic lupus erythematosus and juvenile idiopathic arthritis]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández Rosiles]]></surname>
<given-names><![CDATA[Vanessa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Duarte Salazar]]></surname>
<given-names><![CDATA[Carolina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Maldonado Velazquez]]></surname>
<given-names><![CDATA[Rocío]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rivas Ruiz]]></surname>
<given-names><![CDATA[Rodolfo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Clark]]></surname>
<given-names><![CDATA[Patricia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital Infantil de México Federico Gómez Departamento de Gastroenterología y Nutrición ]]></institution>
<addr-line><![CDATA[México D.F.]]></addr-line>
<country>MX</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Rehabilitación Servicio de Reumatología ]]></institution>
<addr-line><![CDATA[México D.F.]]></addr-line>
<country>MX</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Hospital Infantil de México Federico Gómez Servicio de Reumatología ]]></institution>
<addr-line><![CDATA[México D.F.]]></addr-line>
<country>MX</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Hospital Infantil de México Federico Gómez  Unidad de Epidemiología Clínica]]></institution>
<addr-line><![CDATA[México D.F.]]></addr-line>
<country>MX</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2015</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2015</year>
</pub-date>
<volume>72</volume>
<numero>2</numero>
<fpage>99</fpage>
<lpage>105</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1665-11462015000200099&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1665-11462015000200099&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1665-11462015000200099&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen:Introducción: Se sabe que la vitamina D (25(OH) D) tiene un efecto directo sobre la salud del hueso y músculo. Se ha relacionado también con enfermedades reumatológicas de origen autoinmune. Los estudios en niños con este tipo de enfermedades son escasos, sobre todo en artritis idiopática juvenil. El objetivo de este trabajo fue determinar las concentraciones de 25(OH) D en pacientes con lupus eritematoso sistémico (LES) y artritis idiopática juvenil (AIJ), y compararlas con las concentraciones en individuos sanos.Métodos: Se determinaron las concentraciones de 25(OH) D por medio de espectrometría de masas con cromatografía liquida por tándem (ID-LC-MS/MS), las concentraciones de la hormona paratiroidea por análisis inmunorradiométrico (IRMA), y las concentraciones de calcio, fósforo y fosfatasa alcalina por métodos colorimétricos en 37 pacientes con LES, 37 pacientes con AIJ y 79 controles sanos.Resultados: Las concentraciones séricas de 25(OH) D fueron de 18.9 ±7.92 ng/ml en LES, 21.97 ± 5.55 ng/ml en AIJ y 23.6 ± 3.07 ng/ml en controles sanos. Hubo una diferencia significativa al comparar las concentraciones de 25 (OH) D entre los pacientes con LES y los controles sanos (p &lt;0.05). El 29.7% de pacientes con LES, el 35.1% con AIJ y el 31.6% de sujetos sanos cursaron con niveles deficientes de vitamina D en este estudio.Conclusiones: Una tercera parte de los niños estudiados en los tres grupos mostraron deficiencias de vitamina D. La más severa fue en los niños con LES.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract:Background: It is well recognized that vitamin D has a direct effect in bone and muscle and has been associated as well with some rheumatologic diseases. Reports in children are scarce. The aim of this study was to determine the concentration level of 25(OH)D in a group of patients with systemic lupus erythematosus (SLE) and juvenile idiopathic arthritis (JIA) and compare them with healthy controls.Methods: Vitamin D (25(OH)D) was measured with isotope-dilution liquid chromatography-tandem mass spectrometry (ID-LC-MS/MS), PTH with immunoradiometric assay (IRMA), calcium, phosphorus and alkaline phosphatase by colorimetric assay in 37 patients with SLE, 37 patients with JIA and 79 healthy controls.Results: Mean 25(OH)D concentration levels were as follows: SLE 18.9 ± 7.92 ng/ml, JIA 21.97 ± 5.55 ng/ml and 23.6 ± 3.07 ng/ml in healthy controls. There was a significant difference between SLE patients vs. healthy controls (p &lt;0.05); 29.7% of SLE patients, 35.1% of JIA patients and 31.6% of healthy controls had deficient levels of vitamin D.Conclusions: One third of the total sample of children in this study had deficient levels of vitamin D. Patients with SLE presented a significant difference compared with healthy controls.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Lupus eritematoso sistémico]]></kwd>
<kwd lng="es"><![CDATA[Artritis idiopática juvenil]]></kwd>
<kwd lng="es"><![CDATA[Vitamina D]]></kwd>
<kwd lng="en"><![CDATA[Systemic lupus erythematosus]]></kwd>
<kwd lng="en"><![CDATA[Juvenile idiopathic arthritis]]></kwd>
<kwd lng="en"><![CDATA[Vitamin D]]></kwd>
</kwd-group>
</article-meta>
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