<?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>0034-7523</journal-id>
<journal-title><![CDATA[Revista Cubana de Medicina]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Cuban de Med]]></abbrev-journal-title>
<issn>0034-7523</issn>
<publisher>
<publisher-name><![CDATA[Centro Nacional de Información de Ciencias MédicasEditorial Ciencias Médicas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0034-75232023000400031</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Anti-C1q como Marcador de Nefritis Lúpica]]></article-title>
<article-title xml:lang="en"><![CDATA[Anti-C1q as Lupus Nephritis Marker]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Kokuina]]></surname>
<given-names><![CDATA[Elena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tamargo Barbeito]]></surname>
<given-names><![CDATA[Teddy Osmin]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Florián San Juan]]></surname>
<given-names><![CDATA[Wilmer Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chico Capote]]></surname>
<given-names><![CDATA[Araceli]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez Bruzón]]></surname>
<given-names><![CDATA[Yeniset]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Estévez del Toro]]></surname>
<given-names><![CDATA[Miguel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Hospital Clínico Quirúrgico Docente &#8220;Hermanos Ameijeiras&#8221;  ]]></institution>
<addr-line><![CDATA[La Habana ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<volume>62</volume>
<numero>4</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0034-75232023000400031&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0034-75232023000400031&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0034-75232023000400031&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción: Los autoanticuerpos anti-C1q han sido propuestos como un marcador útil en el lupus eritematoso sistémico por su asociación con la nefritis lúpica.  Objetivo: Determinar la prevalencia de anti-C1q en pacientes con lupus eritematoso sistémico y otras enfermedades reumáticas para la evaluar la asociación con la nefropatía lúpica.  Métodos: Se incluyeron 179 pacientes con lupus eritematoso sistémico y 82 con otras enfermedades reumáticas. La nefritis lúpica fue diagnosticada en 70 (39 %) de los pacientes con lupus eritematoso sistémico. Los anticuerpos anti-C1q IgG se determinaron por ELISA. Las asociaciones se evaluaron por análisis de regresión logística.  Resultados: La prevalencia de anti-C1q fue de 37 % (66/179) en los pacientes con lupus eritematoso sistémico y de 9 % (7/82) en controles (OR = 6,3; IC 95 % 2,8-14,1; p &lt; 0,001). El anti-C1q fue asociado con proteinuria (OR = 2,6; IC 95 % 1,2-6,0; p &lt; 0,022); eritrosedimentación elevada (OR = 3,2; IC 95 % 1,5-6,7; p &lt; 0,003) y anti-DNAdc (OR = 3,9; IC 95 % 1,7-9,1; p &lt; 0,002). En el modelo de regresión logística ajustado para demografía y anti-DNAdc, aunque la OR del anti-C1q para la nefritis fue 2 veces más alta que en ausencia del anti-C1q, solo se aproximó a la significación estadística. La positividad simultánea de anti-C1q y anti-DNAdc estuvo asociada a la nefritis lúpica (OR = 4,3; IC 95 % 1,9-9,5; p &lt; 0,001).  Conclusiones: El anti-C1q se presentó con mayor frecuencia en pacientes con lupus eritematoso sistémico que en los controles. El anti-C1q combinado con anti-DNAdc resultó fuertemente asociado a la nefritis lúpica.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT  Introducción: Anti-C1q autoantibodies have been proposed as useful marker in systemic lupus erythematosus due to their association with lupus nephritis.  Objective: To determine the prevalence of anti-C1q in patients with systemic lupus erythematosus and other rheumatic diseases to evaluate the association with lupus nephropathy.  Methods: One hundred seventy-nine patients with systemic lupus erythematosus and 82 with other rheumatic diseases were included. Lupus nephritis was diagnosed in 70 (39%) of patients with systemic lupus erythematosus. Anti-C1q IgG antibodies were determined by ELISA. Associations were evaluated by logistic regression analysis.  Results: The prevalence of anti-C1q was 37% (66/179) in patients with systemic lupus erythematosus and 9% (7/82) in controls (OR = 6.3; 95% CI 2.8-14). .1; p &lt; 0.001). Anti-C1q was associated with proteinuria (OR = 2.6; 95% CI 1.2-6.0; p &lt; 0.022); elevated erythrocyte sedimentation rate (OR = 3.2; 95% CI 1.5-6.7; p &lt; 0.003) and anti-dsDNA (OR = 3.9; 95% CI 1.7-9.1; p &lt; 0.002). In the logistic regression model adjusted for demographics and anti-dsDNA, although the OR of anti-C1q for nephritis was 2-fold higher than in the absence of anti-C1q, it only approached statistical significance. Simultaneous positivity of anti-C1q and anti-dsDNA was associated with lupus nephritis (OR = 4.3; 95% CI 1.9-9.5; p &lt; 0.001).  Conclusions: Anti-C1q occurred more frequently in patients with systemic lupus erythematosus than in controls. Anti-C1q combined with anti-dsDNA was strongly associated with lupus nephritis.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[anti-C1q]]></kwd>
<kwd lng="es"><![CDATA[anti-DNAdc]]></kwd>
<kwd lng="es"><![CDATA[nefritis lúpica]]></kwd>
<kwd lng="es"><![CDATA[lupus eritematoso sistémica]]></kwd>
<kwd lng="en"><![CDATA[anti-C1q]]></kwd>
<kwd lng="en"><![CDATA[anti-dsdna]]></kwd>
<kwd lng="en"><![CDATA[lupus nephritis]]></kwd>
<kwd lng="en"><![CDATA[systemic lupus erythematosus]]></kwd>
</kwd-group>
</article-meta>
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