<?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>0188-6266</journal-id>
<journal-title><![CDATA[Acta universitaria]]></journal-title>
<abbrev-journal-title><![CDATA[Acta univ]]></abbrev-journal-title>
<issn>0188-6266</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Guanajuato, Dirección de Investigación y Posgrado]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0188-62662016000500024</article-id>
<article-id pub-id-type="doi">10.15174/au.2016.984</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Quantitation of Cd, Pb and Fe in three medicinal plants (Justicia spicigera, Arnica montana and Hamelia pantens) from environmentally diverse locations of Huasteca Potosina, Mexico]]></article-title>
<article-title xml:lang="es"><![CDATA[Cuantificación de Cd, Pb y Fe en tres plantas medicinales (Justicia spicigera, Arnica montana y Hamelia pantens) de distintas localidades de la Huasteca Potosina, México]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carranza-Álvarez]]></surname>
<given-names><![CDATA[Candy]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alonso Castro]]></surname>
<given-names><![CDATA[Ángel Josabad]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Maldonado-Miranda]]></surname>
<given-names><![CDATA[Juan José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández Morales]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Autónoma de San Luis Potosí Unidad Académica Multidisciplinaria Zona Huasteca ]]></institution>
<addr-line><![CDATA[ S.L.P.]]></addr-line>
<country>México</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad de Guanajuato Departamento de Farmacia División de Ciencias Naturales y Exactas]]></institution>
<addr-line><![CDATA[ Guanajuato]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2016</year>
</pub-date>
<volume>26</volume>
<numero>5</numero>
<fpage>24</fpage>
<lpage>30</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0188-62662016000500024&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0188-62662016000500024&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0188-62662016000500024&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Recently, use of medicinal plants in Mexico and around the world has increased. However, in order to guarantee safe use of medicinal plants, it is necessary to quantify their content of heavy metals. In Mexico there is little information regarding content of toxic elements in medicinal plants, and these are consumed directly without a prior analysis of heavy metals. In this study, concentration of two toxic elements: cadmiom and lead (Cd and Pb) and a micronutrient (iron [Fe]) was quantified in three medicinal plants (Justicia spicigera, Arnica montana, and Hamelia pantens) collected from three different locations in two municipalities in the Huasteca Potosina, Mexico. Cd and Pb are two toxic elements with no biological function, and can cause severe damage when introduced into food chain, whereas iron is an essential element. However, iron is a major element that can form oxides and entrap trace elements such as Pb and Cd, and induce bioaccumulation of these elements in plants. Also, in the Huasteca Potosina, the three medicinal plants of this study are used for empirical treatment of iron deficiency. Therefore, it was important to study concentration of the three elements in these medicinal plants. Results of this analysis showed that 50% and 22% of herbal preparations contain higher contents of Cd and Pb than those considered as safe, respectively. In addition, the three medicinal plants could be an important source of Fe. Results suggest that collection of medicinal plants should be carried out in sites free of potentially dangerous toxic elements.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Recientemente, el uso de plantas medicinales en México y en todo el mundo se ha incrementado. Sin embargo, con el fin de garantizar el uso seguro en de las plantas medicinales, es necesario cuantificar su contenido de metales pesados. En México existe poca información sobre el contenido de elementos tóxicos en las plantas medicinales, y estas son consumidas directamente sin realizar un análisis previo de metales pesados. En este estudio se cuantificó la concentración de dos elementos tóxicos: cadmio y plomo (Cd y Pb) y de un micronutriente: fierro (Fe), en tres plantas medicinales (Justicia spicigera, Arnica montana y Hamelia pantens) colectadas de tres sitios diferentes de dos municipios de la Huasteca Potosina, México. El Cd y Pb son dos elementos tóxicos sin ninguna función biológica conocida, que pueden causar severos daños al introducirse en la cadena alimenticia, mientras que el hierro es un elemento esencial. Sin embargo, el hierro es un elemento mayoritario que puede formar óxidos y atrapar elementos traza como el Pb y Cd, y favorecer la bioacumulación de estos elementos en las plantas. Además, en la Huasteca Potosina, las tres plantas medicinales en estudio son usadas para el tratamiento empírico en la deficiencia de hierro. Por lo anterior, fue importante estudiar la concentración de los tres elementos en ambas plantas medicinales. Los resultados de este análisis mostraron que el 50% y el 22% de los preparados de plantas medicinales contienen valores más altos que los considerados como seguros para Cd y Pb, respectivamente. Además, se confirma que estas tres plantas medicinales podrían ser una fuente importante de Fe. Con esto se sugiere que la recolección de plantas medicinales se debe realizar en sitios libres de elementos tóxicos potencialmente peligrosos.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Medicinal plants]]></kwd>
<kwd lng="en"><![CDATA[heavy metals]]></kwd>
<kwd lng="en"><![CDATA[Cd]]></kwd>
<kwd lng="en"><![CDATA[Pb]]></kwd>
<kwd lng="en"><![CDATA[Fe]]></kwd>
<kwd lng="es"><![CDATA[Plantas medicinales]]></kwd>
<kwd lng="es"><![CDATA[metales pesados]]></kwd>
<kwd lng="es"><![CDATA[Cd]]></kwd>
<kwd lng="es"><![CDATA[Pb]]></kwd>
<kwd lng="es"><![CDATA[Fe]]></kwd>
</kwd-group>
</article-meta>
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