<?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>0034-7418</journal-id>
<journal-title><![CDATA[Revista Colombiana de Ciencias Químico - Farmacéuticas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. colomb. cienc. quim. farm.]]></abbrev-journal-title>
<issn>0034-7418</issn>
<publisher>
<publisher-name><![CDATA[Departamento de Farmácia, Facultad de Ciencias, Universidade Nacional da Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0034-74182021000300685</article-id>
<article-id pub-id-type="doi">10.15446/rcciquifa.v50n3.100226</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Coumarin (2H-1-Benzopyran-2-one) act against planktonic and biofilm forms of Staphylococcus aureus, Klebsiellapneumoniae and Pseudomonas aeruginosa]]></article-title>
<article-title xml:lang="es"><![CDATA[La cumarina (2H-1-Benzopiran-2-ona) actúa contra las formas planctónicas y de biopelícula de Staphylococcus aureus, Klebsiella pneumoniae y Pseudomonas aeruginosa]]></article-title>
<article-title xml:lang="pt"><![CDATA[A cumarina (2H-1-benzopiran-2-ona) age contra as formas planctônicas e de biofilme de Staphylococcus aureus, Klebsiella pneumoniae e Pseudomonas aeruginosa]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vilar Cordeiro]]></surname>
<given-names><![CDATA[Laísa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[da Silva Souza]]></surname>
<given-names><![CDATA[Helivaldo Diógenes]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[da Silva Sá]]></surname>
<given-names><![CDATA[Giulian César]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pereira Sousa]]></surname>
<given-names><![CDATA[Aleson]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramalho de Figueiredo]]></surname>
<given-names><![CDATA[Pedro Thiago]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silva Neta]]></surname>
<given-names><![CDATA[Maria das Neves]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barbosa Filho]]></surname>
<given-names><![CDATA[José Maria]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[de Oliveira Lima]]></surname>
<given-names><![CDATA[Edeltrudes]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Federal University of Paraíba Health Sciences Center Department of Pharmaceutical Science]]></institution>
<addr-line><![CDATA[ João Pessoa]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Federal University of Rio Grande do Norte Biochemistry Department Biosciences Center]]></institution>
<addr-line><![CDATA[ Natal]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Federal University of Paraíba Chemistry Department Exact and Natural Sciences Center]]></institution>
<addr-line><![CDATA[ João Pessoa]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>50</volume>
<numero>3</numero>
<fpage>685</fpage>
<lpage>694</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0034-74182021000300685&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0034-74182021000300685&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0034-74182021000300685&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[SUMMARY  Introduction: biofilm-related infections caused by Staphylococcus aureus, Klebsiella pneumoniae and Pseudomonas aeruginosa are difficult to treat and few effective pharmacological options are currently available for this purpose. In this context, coumarin (2H-1-Benzopyran-2-one) has been reported to have antibacterial and antibiofilm activity, but this potential remains poorly understood.  Aim: to investigate the action of coumarin on planktonic and biofilm forms of S. aureus, K. pneumoniae and P. aeruginosa.  Results: a minimum inhibitory concentration (MIC) of coumarin ranging from 256 to 1024 fig/mL was observed, with a remarkable ability to inhibit the formation of biofilms and to act on mature biofilms in concentrations close to MIC.  Conclusion: coumarin has strong activity against planktonic and biofilm forms on the three species of great relevance in the clinical scenario. These results are interesting to enable a pharmacological alternative for the treatment of these infections.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN  Introducción: las infecciones relacionadas con la biopelícula causadas por Staphylococcus aureus, Klebsiella pneumoniae y Pseudomonas aeruginosa son difíciles de tratar y actualmente existen pocas opciones farmacológicas eficaces para este propósito. En este contexto, se ha informado que la cumarina (2H-1-Benzopiran-2-ona) tiene actividad antibacteriana y antibiofilm, pero este potencial sigue siendo poco conocido.  Objetivo: investigar la acción de la cumarina sobre formas planctónicas y de biopelículas de S. aureus, K. pneumoniae y P. aeruginosa.  Resultados: se observó una concentración inhibitoria mínima (CMI) de cumarina en el rango de 256 a 1024 &#956;g/mL, con una notable capacidad para inhibir la formación de biofilms y actuar sobre biofilms maduros en concentraciones cercanas a la CMI.  Conclusión: la cumarina tiene una fuerte actividad contra las formas planctónicas y biofilm sobre las tres especies de gran relevancia en el escenario clínico. Estos resultados son interesantes para habilitar una alternativa farmacológica para el tratamiento de estas infecciones.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[RESUMO  Introdução: as infecções relacionadas ao biofilme causadas por Staphylococcus aureus, Klebsiella pneumoniae e Pseudomonas aeruginosa são difíceis de tratar e poucas opções farmacológicas eficazes estão disponíveis atualmente para esse propósito. Nesse contexto, foi relatado que a cumarina (2H-1-benzopirano-2-ona) tem atividade antibacteriana e antibiofilme, mas esse potencial permanece pouco conhecido.  Objetivo: investigar a ação da cumarina sobre as formas planctónicas e de biofilme de S. aureus, K. pneumoniae e P. aeruginosa.  Resultados: observou-se uma concentração inibitória mínima (CIM) de cumarina variando de 256 a 1024 &#956;g/mL, com notável capacidade de inibir a formação de biofilmes e de atuar sobre biofilmes maduros em concentrações próximas à CIM.  Conclusão: a cumarina possui forte atividade contra as formas planctónicas e de biofilme sobre as três espécies de grande relevância no cenário clínico. Esses resultados são interessantes para possibilitar uma alternativa farmacológica para o tratamento dessas infecções.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Coumarin]]></kwd>
<kwd lng="en"><![CDATA[antibacterial activity]]></kwd>
<kwd lng="en"><![CDATA[biofilms]]></kwd>
<kwd lng="en"><![CDATA[2H-1-Benzopyran-2-one]]></kwd>
<kwd lng="es"><![CDATA[Cumarina]]></kwd>
<kwd lng="es"><![CDATA[actividad antibacterial]]></kwd>
<kwd lng="es"><![CDATA[biopelículas]]></kwd>
<kwd lng="es"><![CDATA[2H-1-Benzopiran-2-ona]]></kwd>
<kwd lng="pt"><![CDATA[Cumarina]]></kwd>
<kwd lng="pt"><![CDATA[atividade antibacteriana]]></kwd>
<kwd lng="pt"><![CDATA[biofilmes]]></kwd>
<kwd lng="pt"><![CDATA[2H-1-benzopirano-2-ona]]></kwd>
</kwd-group>
</article-meta>
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