<?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>0120-0690</journal-id>
<journal-title><![CDATA[Revista Colombiana de Ciencias Pecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Colom Cienc Pecua]]></abbrev-journal-title>
<issn>0120-0690</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Ciencias Agrarias, Universidad de Antioquia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-06902022000200093</article-id>
<article-id pub-id-type="doi">10.17533/udea.rccp.v35n2a03</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Well-of-the-well (WOW) versus polyester mesh (PM): a comparison of single-embryo culture systems in bovines]]></article-title>
<article-title xml:lang="es"><![CDATA[Pozo dentro de pozo (WOW) versus tela de poliéster (PM): una comparación de sistemas de cultivo individual de embriones bovinos]]></article-title>
<article-title xml:lang="pt"><![CDATA[Well-of-the-well (WOW) versus malha de poliéster (PM): uma comparação de sistemas de cultura de um único embrião em bovinos]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Contreras-Benicio]]></surname>
<given-names><![CDATA[Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castro-Valenzuela]]></surname>
<given-names><![CDATA[Beatriz Elena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Grado-Ahuir]]></surname>
<given-names><![CDATA[Juan Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Burrola-Barraza]]></surname>
<given-names><![CDATA[María Eduviges]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Chihuahua Facultad de Zootecnia y Ecología ]]></institution>
<addr-line><![CDATA[Chihuahua Chihuahua]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<volume>35</volume>
<numero>2</numero>
<fpage>93</fpage>
<lpage>108</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-06902022000200093&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-06902022000200093&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-06902022000200093&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Background: Mexico is innovating in the livestock industry through in vitro generation of bovine embryos with technologies such as well-of-the-well (WOW) and polyester mesh (PM) single-embryo culture systems. These techniques allow to maintain embryos in separate areas of a shared culture medium.  Objective: To compare the quantity and quality of bovine embryos produced in WOW and PM culture systems versus the conventional (CG) culture system.  Methods: In total, 345 embryos fertilized in vitro were evaluated for blastocyst yield in the three culture systems. To count blastocyst cell numbers, 69 embryos in each system were differentially stained for trophectoderm (TE), inner cell mass (ICM), and apoptotic cells. A qPCR gene expression analysis was performed for embryos in all three systems.  Results: The WOW, PM and CG systems developed similar amount of blastocysts (41, 35 and 36%, respectively; p&gt;0.05). Blastocysts in all three systems showed adequate amounts of ICM and apoptotic cells. Blastocysts in the PM system showed a greater number of TE cells [63.7 versus 58.6% in the CG system (p&lt;0.05)]. Relative mRNA expression of the embryonic genes POUF5F1, GNAS and TP53 did not differ significantly among systems (p&gt;0.05). The ATP5B expression was higher in WOW than in PM (p&lt;0.05), but similar to CG (p&gt;0.05). The TJP3 expression was higher in PM than in WOW and CG (p&lt;0.05). Expression of ID2 and CLDN4 was higher in WOW than in PM and CG (p&lt;0.05). The biplot graphic from Principal Component Analysis (PCA) revealed that CG was located near degenerated embryos, whereas PM was located near arrested embryos, larger ICM and TE, and TJP3 expression. The WOW was located toward blastocysts, morulae, and expression of CLDN4, ID2 and GNAS.  Conclusion: Compared with CG, both the PM and WOW systems are good options for culturing single embryos in the bovine model. Moreover, the PCA results suggest that embryos developed in the WOW system have greater capacity for generating blastocysts with increased ability to form TE and ICM layers, which might improve implantation.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Antecedentes: México está innovando en la industria ganadera a través de la generación in vitro de embriones bovinos con tecnologías de cultivo individual como lo son Pozo dentro de Pozo (WOW) y Malla de Poliéster (PM). Estos mantienen los embriones en áreas separadas mientras comparten un mismo medio de cultivo celular.  Objetivo: Comparar la cantidad y calidad de embriones bovinos producidos en los sistemas WOW y PM contra el sistema de cultivo convencional en grupo (CG).  Métodos: En total se evaluaron 345 embriones fertilizados in vitro para determinar la producción de blastocistos generados en los tres sistemas. Para contar el número de células por blastocisto, 69 embriones en cada sistema se tiñeron diferencialmente para trofectodermo (TE), masa celular interna (ICM) y células apoptóticas. Se realizó un análisis de expresión génica por qPCR de los embriones obtenidos en los tres sistemas.  Resultados: Los sistemas WOW, PM y CG desarrollaron similares cantidades de blastocistos (41, 35 y 36%, respectivamente; p&gt;0,05). Los blastocistos en los tres sistemas mostraron cantidades adecuadas de ICM y células apoptóticas. Los blastocistos en el sistema PM mostraron un mayor número de células TE [63,7% versus 58,6% en el sistema CG (p&lt;0,05)]. La expresión relativa de mRNA de los genes embrionarios POUF5F1, GNAS y TP53 no difirió significativamente entre los sistemas (p&gt;0,05). La expresión de ATP5B fue mayor en WOW que en PM (p&lt;0,05), pero similar a CG (p&lt;0,05). La expresión de TJP3 fue mayor en PM que en WOW y CG (p&lt;0,05). La expresión de ID2 y CLDN4 fue mayor en WOW que en PM y CG (p&lt;0,05). El gráfico de biplot del análisis de componentes principales reveló que CG se encontró cerca de embriones degenerados, mientras que PM se encontró cerca de embriones en arresto, ICM, TE, y TJP3. El WOW se localizó hacia blastocistos, mórulas y la expresión de CLDN4, ID2 y GNAS.  Conclusión: En el modelo bovino los sistemas PM y WOW son buenas opciones para cultivar embriones individuales, ya que se obtienen resultados muy similares a los obtenidos con el sistema CG. Además, los resultados de PCA sugieren que los embriones individuales desarrollados en el sistema WOW generan blastocistos con mayor capacidad de formar TE e ICM, lo que podría mejorar su éxito de implantación.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo  Antecedentes: O México está inovando na indústria pecuária por meio da geração in vitro de embriões bovinos com tecnologias de cultura de embriões individuais, bem como em poço (WOW) e malha de poliéster (PM). Estes mantêm os embriões em áreas separadas, enquanto compartilham o mesmo meio de cultura de células.  Objetivo: Comparar a quantidade e a qualidade de embriões bovinos produzidos nos sistemas de cultura WOW e PM com o sistema convencional de cultura em grupo (CG).  Métodos: No total, 345 embriões fertilizados in vitro foram avaliados para determinar a produção de blastocistos gerados nos três sistemas. O número de células por blatocisto foi contado, 69 embriões em cada sistema foram diferencialmente corados para trofectoderme (TE), massa celular interna (ICM) e células apoptóticas. Uma análise de expressão gênica qPCR foi realizada para os embriões obtidos nos três sistemas.  Resultados: Os sistemas WOW, PM e CG desenvolveram quantidades semelhantes de blastocistos (41, 35 e 36%, respectivamente; p&gt;0,05). Os blastocistos nos três sistemas mostraram quantidades adequadas de ICM e células apoptóticas. Os blastocistos no sistema PM mostraram um número maior de células TE [63,7 versus 58,6% no sistema CG (p&lt;0,05)]. A expressão relativa do mRNA dos genes embrionários POUF5F1, GNAS e TP53 não diferiu significativamente entre os sistemas (p&gt;0,05). A expressão de ATP5B foi maior no WOW do que no PM (p&lt;0,05), mas semelhante ao GC (p&lt;0,05). A expressão de TJP3 foi maior no PM do que no WOW e CG (p&lt;0,05). A expressão de ID2 e CLDN4 foi maior no WOW do que no PM e CG (p&lt;0,05). O gráfico biplot da análise de componentes principais revelou que CG foi encontrado próximo a embriões degenerados, enquanto PM foi encontrado próximo a embriões presos, ICM, TE e TJP3. WOW foi encontrado para ter blastocistos, mórulas e a expressão de CLDN4, ID2 e GNAS.  Conclusão: Em comparação com o CG, os sistemas PM e WOW são boas opções para a cultura de embriões individuais no modelo bovino. Além disso, os resultados da PCA sugerem que embriões individuais desenvolvidos no sistema WOW têm maior capacidade de desenvolver blastocistos com maior capacidade de formar as camadas TE e ICM, o que poderia melhorar seu sucesso de implantação.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[bovine embryo]]></kwd>
<kwd lng="en"><![CDATA[embryo quality]]></kwd>
<kwd lng="en"><![CDATA[embryo recovery]]></kwd>
<kwd lng="en"><![CDATA[in vitro culture]]></kwd>
<kwd lng="en"><![CDATA[in vitro embryo production]]></kwd>
<kwd lng="en"><![CDATA[polyester mesh culture]]></kwd>
<kwd lng="en"><![CDATA[single-embryo culture]]></kwd>
<kwd lng="en"><![CDATA[well-of-the-well culture]]></kwd>
<kwd lng="es"><![CDATA[calidad embrionaria]]></kwd>
<kwd lng="es"><![CDATA[cultivo de malla de poliéster]]></kwd>
<kwd lng="es"><![CDATA[cultivo individual]]></kwd>
<kwd lng="es"><![CDATA[cultivo in vitro]]></kwd>
<kwd lng="es"><![CDATA[cultivo pozo- dentro-de-pozo]]></kwd>
<kwd lng="es"><![CDATA[embriones bovinos]]></kwd>
<kwd lng="es"><![CDATA[producción in vitro de embriones]]></kwd>
<kwd lng="es"><![CDATA[recuperación de embriones]]></kwd>
<kwd lng="pt"><![CDATA[cultura em tela de poliéster]]></kwd>
<kwd lng="pt"><![CDATA[cultura individual]]></kwd>
<kwd lng="pt"><![CDATA[cultura in vitro]]></kwd>
<kwd lng="pt"><![CDATA[cultura well-in-well]]></kwd>
<kwd lng="pt"><![CDATA[embriões bovinos]]></kwd>
<kwd lng="pt"><![CDATA[qualidade embrionária]]></kwd>
<kwd lng="pt"><![CDATA[produção de embriões in vitro]]></kwd>
<kwd lng="pt"><![CDATA[recuperação embrionária]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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