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  <front>
    <journal-meta>
      <journal-id journal-id-type="nlm-ta">Arq Bras Cardiol</journal-id>
      <journal-id journal-id-type="publisher-id">abc</journal-id>
      <journal-title-group>
        <journal-title>Arquivos Brasileiros de Cardiologia</journal-title>
        <abbrev-journal-title abbrev-type="publisher">Arq. Bras. Cardiol.</abbrev-journal-title>
      </journal-title-group>
      <issn pub-type="ppub">0066-782X</issn>
      <issn pub-type="epub">1678-4170</issn>
      <publisher>
        <publisher-name>Sociedade Brasileira de Cardiologia - SBC</publisher-name>
      </publisher>
    </journal-meta>
    <article-meta>
      <article-id pub-id-type="publisher-id" specific-use="scielo-v3">dRGVwBXd4SrkkSWz5Pvsgjc</article-id>
      <article-id pub-id-type="publisher-id" specific-use="scielo-v2">S0066-782X2018000100004</article-id>
      <article-id pub-id-type="doi">10.5935/abc.20180010</article-id>
      <article-categories>
        <subj-group subj-group-type="heading">
          <subject>Short Editorial</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title>Cardiovascular Risk Stratification: From Phenotype to Genotype?</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name>
            <surname>Bittencourt</surname>
            <given-names>Marcio Sommer</given-names>
          </name>
          <xref ref-type="aff" rid="aff1">1</xref>
          <xref ref-type="aff" rid="aff2"/>
          <xref ref-type="aff" rid="aff3"/>
          <xref ref-type="corresp" rid="c1"/>
        </contrib>
      </contrib-group>
      <aff id="aff1">
        <label>1</label>
        <institution content-type="orgname">Hospital Israelita Albert Einstein</institution>
        <institution content-type="orgdiv1">Faculdade Israelita de Ci&#234;ncias da Sa&#250;de Albert Einstein</institution>
        <addr-line>
          <named-content content-type="city">S&#227;o Paulo</named-content>
          <named-content content-type="state">SP</named-content>
        </addr-line>
        <country country="BR">Brazil</country>
        <institution content-type="original">Hospital Israelita Albert Einstein e Faculdade Israelita de Ci&#234;ncias da Sa&#250;de Albert Einstein; Centro de Pesquisa Cl&#237;nica e Epidemiol&#243;gica - Hospital Universit&#225;rio e Instituto do C&#226;ncer do Estado de S&#227;o Paulo (ICESP) - Universidade de S&#227;o Paulo; Diagn&#243;sticos da Am&#233;rica (DASA) &#8211; S&#227;o Paulo, SP &#8211; Brazil</institution>
        <institution content-type="normalized">Hospital Israelita Albert Einstein</institution>
      </aff>
      <aff id="aff2">
        <institution content-type="orgname">Universidade de S&#227;o Paulo</institution>
        <institution content-type="orgdiv1">Hospital Universit&#225;rio</institution>
        <institution content-type="orgdiv2">Centro de Pesquisa Cl&#237;nica e Epidemiol&#243;gica</institution>
        <addr-line>
          <named-content content-type="city">S&#227;o Paulo</named-content>
          <named-content content-type="state">SP</named-content>
        </addr-line>
        <country country="BR">Brazil</country>
        <institution content-type="normalized">Universidade de S&#227;o Paulo</institution>
      </aff>
      <aff id="aff3">
        <institution content-type="orgname">Diagn&#243;sticos da Am&#233;rica</institution>
        <addr-line>
          <named-content content-type="city">S&#227;o Paulo</named-content>
          <named-content content-type="state">SP</named-content>
        </addr-line>
        <country country="BR">Brazil</country>
      </aff>
      <author-notes>
        <corresp id="c1"><bold>Mailing Address: Marcio Sommer Bittencourt,</bold> Hospital Universit&#225;rio - Universidade de S&#227;o Paulo - Av. Lineu Prestes, 2565 Postal Code 05508-000, S&#227;o Paulo - Brazil. E-mail: <email>msbittencourt@mail.harvard.edu</email>
				</corresp>
      </author-notes>
      <pub-date pub-type="epub-ppub">
        <month>01</month>
        <year>2018</year>
      </pub-date>
      <volume>110</volume>
      <issue>1</issue>
      <fpage>4</fpage>
      <lpage>4</lpage>
      <permissions>
        <license license-type="open-access" xlink:href="https://creativecommons.org/licenses/by/4.0/" xml:lang="en">
          <license-p>This is an Open Access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited</license-p>
        </license>
      </permissions>
      <kwd-group xml:lang="en">
        <title>Keywords</title>
        <kwd>Acute Coronary Syndrome/genetic</kwd>
        <kwd>Metabolic Syndrome</kwd>
        <kwd>Risk Factors</kwd>
        <kwd>Risk Assessment</kwd>
        <kwd>Polymorphism, Genetic</kwd>
      </kwd-group>
    </article-meta>
  </front>
  <body>
    <p>Cardiovascular risk scores, such as the Framingham score, have been strongly recommended by clinical guidelines on the assessment of cardiovascular risk.<xref ref-type="bibr" rid="B1">1</xref> However, several studies have shown limitations for their use,<xref ref-type="bibr" rid="B2">2</xref><sup>,</sup><xref ref-type="bibr" rid="B3">3</xref> particularly in patients at intermediate risk, young patients with a definite family history, and women. Among different tools aimed at improving risk stratification by complementary methods, the use of genetic information has been proposed to enhance risk prediction.<xref ref-type="bibr" rid="B4">4</xref>
		</p>
    <p>Although many genetic polymorphisms have been associated with increased cardiovascular risk, the additional value of their use in the clinical practice has not been defined yet. One of the reason for such limitation lies on the fact that atherosclerosis is a multifactorial disease, and the individual role of each polymorphism is limited. Since many polymorphisms associated with atherosclerotic disease have been identified, some authors have investigated combinations of several polymorphisms aiming to develop genetic scores that serve as stronger predictors of cardiovascular risk. Nevertheless, despite great enthusiasm about the role of genetic information on the development of cardiovascular risk, previous data have suggested that even with the combination of more than 50 polymorphisms, the best risk stratification achieved was still poor, and of low clinical value in its current form.<xref ref-type="bibr" rid="B5">5</xref>
		</p>
    <p>In another attempt to assess the role of genetic scores on atherosclerotic disease, Fisher et al. investigated 116 individuals with metabolic syndrome and recent history of acute coronary syndrome (ACS) to assess the association between several genetic polymorphisms and the extension of coronary artery disease (CAD).<xref ref-type="bibr" rid="B6">6</xref> While lipoprotein lipase gene polymorphism was associated with atherosclerotic load, polymorphism-derived genetic score was not associated with atherosclerotic load defined by Gensini score in invasive angiography.</p>
    <p>These findings may be explained by several reasons. First, the sample size was relatively small for a genetic study. Second, the value of each polymorphism, alone is usually small. In addition, while most studies use gene panels composed of tens of markers, only seven markers were used in this study. Finally, the population studied was different from those of population-based studies. Using recent ACS as an inclusion criterion, the present study included not only patients with clear evidence of atherosclerosis, but also with recent history of plaque instability. The selection of individuals with such different phenotypes may also have affected the development of a genetic score.</p>
    <p>Despite these limitations, the study expands the literature on genetic assessment of CAD, demonstrating once again that this association is not simple.</p>
    <p>In order to make genetic score part of routine clinical care, improvement of genetic sequencing techniques, development of studies involving larger, representative populations, and the use of modern data modeling methodologies that incorporate nuances beyond the linear association between predictors and outcomes are required.<xref ref-type="bibr" rid="B7">7</xref>
		</p>
  </body>
  <back>
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  </back>
  <sub-article article-type="translation" id="s1" xml:lang="pt">
    <front-stub>
      <article-categories>
        <subj-group subj-group-type="heading">
          <subject>Minieditorial</subject>
        </subj-group>
      </article-categories>
      <title-group>
        <article-title>Estratifica&#231;&#227;o de Risco Cardiovascular: Do Fen&#243;tipo para o Gen&#243;tipo?</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <name>
            <surname>Bittencourt</surname>
            <given-names>Marcio Sommer</given-names>
          </name>
          <xref ref-type="aff" rid="aff4"/>
          <xref ref-type="corresp" rid="c2"/>
        </contrib>
      </contrib-group>
      <aff id="aff4">
        <institution content-type="original">Hospital Israelita Albert Einstein e Faculdade Israelita de Ci&#234;ncias da Sa&#250;de Albert Einstein; Centro de Pesquisa Cl&#237;nica e Epidemiol&#243;gica - Hospital Universit&#225;rio e Instituto do C&#226;ncer do Estado de S&#227;o Paulo (ICESP) - Universidade de S&#227;o Paulo; Diagn&#243;sticos da Am&#233;rica (DASA) &#8211; S&#227;o Paulo, SP &#8211; Brasil</institution>
      </aff>
      <author-notes>
        <corresp id="c2"><bold>Correspond&#234;ncia: Marcio Sommer Bittencourt,</bold> Hospital Universit&#225;rio - Universidade de S&#227;o Paulo - Av. Lineu Prestes, 2565 CEP 05508-000, S&#227;o Paulo - Brasil. E-mail: <email>msbittencourt@mail.harvard.edu</email>
				</corresp>
      </author-notes>
      <kwd-group xml:lang="pt">
        <title>Palavras-chave</title>
        <kwd>S&#237;ndrome Coronariana Aguda/gen&#233;tica</kwd>
        <kwd>S&#237;ndrome Metab&#243;lica</kwd>
        <kwd>Fatores de Risco</kwd>
        <kwd>Medi&#231;&#227;o de Risco</kwd>
        <kwd>Polimorfismo Gen&#233;tico</kwd>
      </kwd-group>
    </front-stub>
    <body>
      <p>Os escores de risco cardiovascular, como o escore de risco de Framingham, s&#227;o amplamente recomendados pelas diretrizes cl&#237;nicas de avalia&#231;&#227;o de risco cardiovascular.<xref ref-type="bibr" rid="B1">1</xref> No entanto, diversos estudos demonstram limita&#231;&#245;es para o seu uso,<xref ref-type="bibr" rid="B2">2</xref><sup>,</sup><xref ref-type="bibr" rid="B3">3</xref> particularmente em pacientes de risco intermedi&#225;rio, jovens com hist&#243;ria familiar francamente positiva e mulheres. Dentre as diversas ferramentas adicionais estudadas para refinar a estratifica&#231;&#227;o de risco com m&#233;todos complementares, o uso de informa&#231;&#245;es gen&#233;ticas tem sido proposto como uma forma de melhorar a predi&#231;&#227;o de risco.<xref ref-type="bibr" rid="B4">4</xref>
			</p>
      <p>Diversos polimorfismos gen&#233;ticos est&#227;o associados com um maior risco cardiovascular, todavia, o valor adicional do seu uso na pr&#225;tica cl&#237;nica ainda n&#227;o est&#225; definido. Um dos principais motivos para esta limita&#231;&#227;o &#233; que a doen&#231;a ateroscler&#243;tica &#233; multifatorial, e o papel individual de cada polimorfismo &#233; restrito. Como diversos polimorfismos associados &#224; doen&#231;a ateroscler&#243;tica j&#225; foram identificados, muitos autores t&#234;m combinado diversos polimorfismos na tentativa de desenvolver escores gen&#233;ticos mais robustos para a predi&#231;&#227;o de risco cardiovascular. Apesar do grande entusiasmo com a import&#226;ncia da carga gen&#233;tica individual no desenvolvimento do risco cardiovascular, dados pr&#233;vios sugerem que mesmo com a inclus&#227;o de mais de 50 polimorfismos diferentes a melhor da estratifica&#231;&#227;o de risco &#233; bastante limitada, e de pouco valor para uso cl&#237;nico em sua forma atual.<xref ref-type="bibr" rid="B5">5</xref>
			</p>
      <p>Em mais uma tentativa de avaliar o papel de escores gen&#233;ticos na doen&#231;a ateroscler&#243;tica, Fisher <italic>et al.,</italic> estudaram 116 indiv&#237;duos com s&#237;ndrome metab&#243;lica e hist&#243;ria de s&#237;ndrome coronariana aguda (SCA) recente para a avalia&#231;&#227;o a associa&#231;&#227;o entre diversos polimorfismos gen&#233;ticos com a extens&#227;o de doen&#231;a arterial coronariana (DAC).<xref ref-type="bibr" rid="B6">6</xref> Enquanto que o polimorfismo da lipoprote&#237;na lipase esteve associado com a carga ateroscler&#243;tica, o escore gen&#233;tico derivado dos polimorfismos analisados n&#227;o se associou com a carga ateroscler&#243;tica definida pelo escore de Gensini na angiografia invasiva.</p>
      <p>Diversas raz&#245;es podem explicar tais achados. Primeiro, o tamanho amostral &#233; relativamente pequeno para estudos gen&#233;ticos. Segundo, o valor isolado de cada polimorfismo costuma ser limitado. A maior parte dos estudos gen&#233;ticos utiliza pain&#233;is com dezenas de marcadores, enquanto que o presente estudo se limitou a sete marcadores. Por fim, a popula&#231;&#227;o selecionada &#233; diferente de outros estudos de base populacional. Com o crit&#233;rio de inclus&#227;o de SCA recente, o presente estudo selecionou apenas pacientes n&#227;o s&#243; com aterosclerose manifesta, mas tamb&#233;m com hist&#243;ria recente de instabilidade de placa. Esta sele&#231;&#227;o de indiv&#237;duos com fen&#243;tipos bastante semelhantes de DAC pode tamb&#233;m ter limitado a capacidade de detec&#231;&#227;o do escore gen&#233;tico.</p>
      <p>Apesar destas limita&#231;&#245;es, este estudo amplia a literatura da avalia&#231;&#227;o gen&#233;tica da DAC, demonstrando mais uma vez que esta associa&#231;&#227;o n&#227;o &#233; simples. Para que os escores gen&#233;ticos tornem-se parte da rotina cl&#237;nica, ser&#225; necess&#225;rio n&#227;o s&#243; melhor desenvolvimento nas t&#233;cnicas de sequenciamento, mas tamb&#233;m o estudo de popula&#231;&#245;es representativas e uso de ferramentas de modelagem de dados mais modernas que possam incorporar nuances que ultrapassam a simples associa&#231;&#227;o linear entre os preditores e desfechos.<xref ref-type="bibr" rid="B7">7</xref>
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