<?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>2007-1124</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias pecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. pecuarias]]></abbrev-journal-title>
<issn>2007-1124</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11242018000400719</article-id>
<article-id pub-id-type="doi">10.22319/rmcp.v9i4.4192</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Kisspeptina en becerras prepúberes: 2. Respuesta de LH, FSH y GH a distintas dosis de kisspeptina-10 y su asociación con IGF-I y leptina circulantes]]></article-title>
<article-title xml:lang="en"><![CDATA[Kisspeptin in prepuberal heifers: 2. Response of LH, FSH and GH to different doses of kisspeptin-10 and its association with circulating IGF-I and leptin]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villa Godoy]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santos Echeverría]]></surname>
<given-names><![CDATA[Rubén]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rosete Fernández]]></surname>
<given-names><![CDATA[Jorge Víctor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Calderón Robles]]></surname>
<given-names><![CDATA[René Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Perera Marín]]></surname>
<given-names><![CDATA[Gerardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Arreguín Arevalo]]></surname>
<given-names><![CDATA[Jesús Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Nett]]></surname>
<given-names><![CDATA[Terry M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[ Ciudad de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,INIFAP CIR Pacífico Sur ]]></institution>
<addr-line><![CDATA[ Guerrero]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,INIFAP CIR Golfo Centro ]]></institution>
<addr-line><![CDATA[ Puebla]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Estatal de Colorado Departamento de Ciencias Biomédicas ]]></institution>
<addr-line><![CDATA[ Colorado]]></addr-line>
<country>USA</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2018</year>
</pub-date>
<volume>9</volume>
<numero>4</numero>
<fpage>719</fpage>
<lpage>737</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242018000400719&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242018000400719&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242018000400719&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: En becerras prepúberes, la kisspeptina-10 (KISS-10) estimula la liberación de hormona luteinizante (LH) y hormona foliculoestimulante (FSH), pero su acción en la hormona del crecimiento (GH) es inconsistente. La hipótesis fue que en becerras prepúberes la magnitud de liberación de LH, FSH y GH en respuesta a KISS-10 es determinada por la dosis y las concentraciones endógenas de IGF-I y leptina. Se usaron 20 becerras prepúberes (100-232 kg de peso y 7-11 meses de edad), mismas que recibieron un bolo i.v. de 5 o 50 µg de KISS-10/kg de peso. Ambas dosis de KISS-10 indujeron un incremento de LH y FSH, más no de GH. La dosis de 50 µg de KISS-10 indujo un área bajo la curva de LH y una duración del incremento de FSH mayores (P&lt;0.05) que la dosis de 5 µg. IGF-I se relacionó negativamente con el aumento de LH en respuesta a la dosis de 50 µg (P&lt;0.05), pero no estuvo asociado con la respuesta de LH a la dosis de 5 µg de KISS-10. La magnitud del incremento de FSH y las concentraciones de GH posteriores a KISS-10 no fueron alteradas por las concentraciones de IGF-I (P&gt;0.05). De la misma forma, las concentraciones de leptina no determinaron (P&gt;0.05) la magnitud del incremento de LH y FSH ni las concentraciones de GH pos tratamiento. En conclusión, la GH no respondió a ninguna dosis, pero la FSH y la LH fueron sensibles al aumento de dosis de KISS-10. Además, la magnitud de respuesta de LH a KISS-10 fue determinada por las concentraciones endógenas de IGF-I, pero no de leptina.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: In prepubertal heifers, kisspeptin-10 (KISS-10) stimulates the release of the luteinizing hormone (LH) and the follicle-stimulating hormone (FSH) but the growth hormone (GH) response is inconsistent. The hypothesis of this study was that in prepubertal heifers, the release of LH, FSH and GH in response to KISS-10 is determined by dose and by endogenous levels of IGF-I and leptin. Twenty heifer calves (100-232 kg of body weight and 7-11 mo of age) received an i.v. injection of 5 or 50 µg of KISS-10/kg of body weight (low and high dose, respectively). The high dose of KISS-10 induced a greater (P&lt;0.05) response of LH (area under the curve) and FSH (duration) than the low dose. IGF-I was negatively associated (P&lt;0.05) to LH in response to the high dose of KISS-10 but IGF-I was not associated with LH in calves treated with the low dose (P&gt;0.05). The magnitude of FSH response as well as GH serum concentrations after KISS-10 were not altered by IGF-I levels (P&gt;0.05). Similarly, leptin concentrations were not associated (P&gt;0.05) with the magnitude of LH and FSH response or GH concentrations after KISS-10. In conclusion, GH did not respond to any dose of KISS-10 but FSH and LH were sensitive to an increment in the KISS-10 dose. Additionally, the magnitude of response of LH to KISS-10 was determined by endogenous levels of IGF-I but it was not associated with levels of leptin.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Kisspeptina-10]]></kwd>
<kwd lng="es"><![CDATA[Becerras prepúberes]]></kwd>
<kwd lng="es"><![CDATA[LH]]></kwd>
<kwd lng="es"><![CDATA[FSH]]></kwd>
<kwd lng="es"><![CDATA[GH]]></kwd>
<kwd lng="es"><![CDATA[IGF-I]]></kwd>
<kwd lng="es"><![CDATA[Leptina]]></kwd>
<kwd lng="en"><![CDATA[Kisspeptin-10]]></kwd>
<kwd lng="en"><![CDATA[Prepubertal heifers]]></kwd>
<kwd lng="en"><![CDATA[LH]]></kwd>
<kwd lng="en"><![CDATA[FSH]]></kwd>
<kwd lng="en"><![CDATA[GH]]></kwd>
<kwd lng="en"><![CDATA[IGF-I]]></kwd>
<kwd lng="en"><![CDATA[Leptin]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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