<?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>1413-4012</journal-id>
<journal-title><![CDATA[RFO UPF]]></journal-title>
<abbrev-journal-title><![CDATA[RFO UPF]]></abbrev-journal-title>
<issn>1413-4012</issn>
<publisher>
<publisher-name><![CDATA[Faculdade de Odontologia da UPF]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1413-40122010000100012</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[Determinação fenotípica das haptoglobinas em pacientes com dor crônica causada por desordens temporomandibulares]]></article-title>
<article-title xml:lang="en"><![CDATA[Haptoglobin phenotypic determination in patients with chronic pain caused by temporomandibular disorders]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moraes]]></surname>
<given-names><![CDATA[Norberto Perri]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Caminhas]]></surname>
<given-names><![CDATA[Maria Margareth Theodoro]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Carli]]></surname>
<given-names><![CDATA[João Paulo De]]></given-names>
</name>
<xref ref-type="aff" rid="A03"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[Soluete Oliveira da]]></given-names>
</name>
<xref ref-type="aff" rid="A04"/>
<xref ref-type="aff" rid="A05"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Linden]]></surname>
<given-names><![CDATA[Maria Salete Sandini]]></given-names>
</name>
<xref ref-type="aff" rid="A05"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Trentin]]></surname>
<given-names><![CDATA[Micheline Sandini]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
<xref ref-type="aff" rid="A05"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pedro]]></surname>
<given-names><![CDATA[Rejane Eliete Luz]]></given-names>
</name>
<xref ref-type="aff" rid="A04"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Unesp Faculdade de Odontologia de Araçatuba Departamento de Patologia e Propedêutica Clínica, disciplina de Estomotologia]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A02">
<institution><![CDATA[,Unesp Faculdade de Medicina Veterinária de Araçatuba Departamento de Apoio, Produção e Saúde Animal]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A03">
<institution><![CDATA[,Unesp  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A04">
<institution><![CDATA[,PUCPR  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="A05">
<institution><![CDATA[,UPF Faculdade de Odontologia ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2010</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2010</year>
</pub-date>
<volume>15</volume>
<numero>1</numero>
<fpage>66</fpage>
<lpage>70</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://revodonto.bvsalud.org/scielo.php?script=sci_arttext&amp;pid=S1413-40122010000100012&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://revodonto.bvsalud.org/scielo.php?script=sci_abstract&amp;pid=S1413-40122010000100012&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://revodonto.bvsalud.org/scielo.php?script=sci_pdf&amp;pid=S1413-40122010000100012&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Os fenótipos do sistema hemoglobina-haptoglobina (Hb-Hp) foram determinados em 124 indívíduos, dos quais cem eram pacientes portadores de algia crônica por desordens temporomandibulares (DTMs) e 24 normais, sem nenhuma dor corporal, durante os anos de 2000-2003. O sistema Hb-Hp apresentou polimorfismo Hp1-1, Hp2-1 e Hp2-2, respectivamente, em 100 e 85%, e anahaptoglobinemia (Hp 0) em 15% da amostra estudada. O genótipo Hp1-1 esteve presente significativamente (p < 0,0001) em pacientes com DTMs, independentemente do tipo clínico da DTM diagnosticada, podendo sugerir a Hp1-1 como provável marcador genético de suscetibilidade para o desenvolvimento de algias crônicas por DTMs.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[The phenotypes of the hemoglobin-haptoglobin (Hb-Hp) system were measured in 124 subjects, 100 patients with chronic pain in temporomandibular disorders and 24 normal, without any bodily pain during the years 2000 -2003. The system Hb-Hp showed polymorphism Hp1-1, Hp2-1 and Hp2-2, at 100% and 85% respectively; anahaptoglobinemia (Hp0) in 15% of the sample studied. Hp1-1 genotype was present significantly (p < 0, 0001) in patients with TMDs, regardless the clinical type TMD, suggesting that Hp1-1 and likely genetic marker of susceptibility for the development of chronic pain in TMD.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[Articulação temporomandibular]]></kwd>
<kwd lng="pt"><![CDATA[Dor]]></kwd>
<kwd lng="pt"><![CDATA[Haptoglobina]]></kwd>
<kwd lng="pt"><![CDATA[Polimorfismo genético]]></kwd>
<kwd lng="en"><![CDATA[Temporomandibular joint]]></kwd>
<kwd lng="en"><![CDATA[Pain]]></kwd>
<kwd lng="en"><![CDATA[Haptoglobin]]></kwd>
<kwd lng="en"><![CDATA[Polymorphism genetic]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p><a name="top"></a><font face="Verdana, Arial, Helvetica, sans-serif" size="4"><b>Determina&ccedil;&atilde;o    fenot&iacute;pica das haptoglobinas em pacientes com dor cr&ocirc;nica causada    por desordens temporomandibulares</b></font></p>     <p>&nbsp;</p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="3"><b>Haptoglobin    phenotypic determination in patients with chronic pain caused by temporomandibular    disorders</b></font></p>     <p>&nbsp;</p>     <p>&nbsp;</p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2"><b>Norberto Perri    Moraes<sup>I</sup>; Maria Margareth Theodoro Caminhas<sup>II</sup>; Jo&atilde;o    Paulo De Carli<sup>III</sup>; Soluete Oliveira da Silva<sup>IV</sup>; Maria    Salete Sandini Linden<sup>V</sup>; Micheline Sandini Trentin<sup>VI</sup>; Rejane    Eliete Luz Pedro<sup>VII</sup></b></font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2"><sup>I</sup>Professor    Titular do Departamento de Patologia e Proped&ecirc;utica Cl&iacute;nica, disciplina    de Estomotologia - Faculdade de Odontologia de Ara&ccedil;atuba/SP/Unesp    <br>   <sup>II</sup>Professora Assistente Doutora de Gen&eacute;tica Animal do Departamento    de Apoio, Produ&ccedil;&atilde;o e Sa&uacute;de Animal - Faculdade de Medicina    Veterin&aacute;ria de Ara&ccedil;atuba/ SP/Unesp    <br>   <sup>III</sup>Mestre em Estomatologia pela Unesp de Ara&ccedil;atuba - SP, aluno    do curso de doutorado em Estomatologia pela PUCPR e professor Assistente da    Faculdade de Odontologia da UPF    <br>   <sup>IV</sup>Doutora em Estomatologia Cl&iacute;nica pela PUCRS, professora    Titular da Faculdade de Odontologia da UPF    ]]></body>
<body><![CDATA[<br>   <sup>V</sup>Doutora em Implantodontia pela SL Mandic/Campinas/SP, professora    Titular da Faculdade de Odontologia da UPF    <br>   <sup>VI</sup>Doutora em Periodontia pela Unesp de Araraquara - SP, professora    Adjunta da Faculdade de Odontologia da UPF    <br>   <sup>VII</sup>Mestra e aluna do curso de doutorado em Gerontologia da PUCRS</font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2"><a href="#back">Endere&ccedil;o    para correspond&ecirc;ncia</a></font></p>     <p>&nbsp;</p>     <p>&nbsp;</p> <hr size="1" noshade>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2"><b>RESUMO</b></font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">Os fen&oacute;tipos    do sistema hemoglobina-haptoglobina (Hb-Hp) foram determinados em 124 ind&iacute;v&iacute;duos,    dos quais cem eram pacientes portadores de algia cr&ocirc;nica por desordens    temporomandibulares (DTMs) e 24 normais, sem nenhuma dor corporal, durante os    anos de 2000-2003. O sistema Hb-Hp apresentou polimorfismo Hp1-1, Hp2-1 e Hp2-2,    respectivamente, em 100 e 85%, e anahaptoglobinemia (Hp 0) em 15% da amostra    estudada. O gen&oacute;tipo Hp1-1 esteve presente significativamente (p &lt;    0,0001) em pacientes com DTMs, independentemente do tipo cl&iacute;nico da DTM    diagnosticada, podendo sugerir a Hp1-1 como prov&aacute;vel marcador gen&eacute;tico    de suscetibilidade para o desenvolvimento de algias cr&ocirc;nicas por DTMs.</font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2"><b>Palavras-chave:    </b> Articula&ccedil;&atilde;o temporomandibular. Dor. Haptoglobina. Polimorfismo    gen&eacute;tico.</font></p> <hr size="1" noshade>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2"><b>ABSTRACT</b></font></p>     ]]></body>
<body><![CDATA[<p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">The phenotypes    of the hemoglobin-haptoglobin (Hb-Hp) system were measured in 124 subjects,    100 patients with chronic pain in temporomandibular disorders and 24 normal,    without any bodily pain during the years 2000 -2003. The system Hb-Hp showed    polymorphism Hp1-1, Hp2-1 and Hp2-2, at 100% and 85% respectively; anahaptoglobinemia    (Hp0) in 15% of the sample studied. Hp1-1 genotype was present significantly    (p &lt; 0, 0001) in patients with TMDs, regardless the clinical type TMD, suggesting    that Hp1-1 and likely genetic marker of susceptibility for the development of    chronic pain in TMD.</font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2"><b>Key words:</b>    Temporomandibular joint. Pain. Haptoglobin. Polymorphism genetic.</font></p> <hr size="1" noshade>     <p>&nbsp;</p>     <p>&nbsp;</p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="3"><b>Introdu&ccedil;&atilde;o</b></font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">Na associa&ccedil;&atilde;o    entre doen&ccedil;as e gen&eacute;tica destaca-se o estudo eletrofor&eacute;tico    do polimorfismo gen&eacute;tico bioqu&iacute;mico do sistema hemoglobina-haptoglobina    associado &agrave; suscetibilidade a infec&ccedil;&otilde;es, inflama&ccedil;&otilde;es    e neoplasias, al&eacute;m de ser um m&eacute;todo laboratorial de baixo custo<sup>1-6</sup>.</font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">A haptoglobina    &eacute; uma prote&iacute;na ligada &agrave; hemoglobina (sistema Hb-Hp) que    apresenta propriedades antioxidantes e imunomodulat&oacute;rias<sup>7-9</sup>.    A fun&ccedil;&atilde;o principal da haptoglobina &eacute; impedir a perda da    hemoglobina em n&iacute;vel renal por meio da forma&ccedil;&atilde;o do sistema    Hb-Hp, que &eacute; estruturalmente est&aacute;vel e de grande tamanho, portanto    n&atilde;o atravessa a membrana glomerular<sup>1</sup>. O sistema Hb-Hp, sendo    est&aacute;vel e estando presente dessa forma na circula&ccedil;&atilde;o sangu&iacute;nea,    permite o estudo bioqu&iacute;mico dos seus n&iacute;veis s&eacute;ricos em    diferentes abordagens de pesquisa, incluindo os estudos gen&eacute;ticos. No    homem existe o polimorfismo gen&eacute;tico da cadeia alfa com tr&ecirc;s principais    gen&oacute;tipos: Hp1-1, Hp1-2 e Hp2-2<sup>1</sup>; determinados por dois genes    codominantes, Hp1 e Hp2, localizados no cromossomo 16q22<sup>10,11</sup>.</font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">Na regi&atilde;o    bucofacial, enfermidades desenvolvem dor cr&ocirc;nica ou persistente durante    tr&ecirc;s a seis meses<sup>12-14</sup>. Dentre as dores cr&ocirc;nicas da regi&atilde;o    bucofacial, as desordens temporomandibulares (DTMs) s&atilde;o motivo de queixa    de grande n&uacute;mero de pacientes no consult&oacute;rio odontol&oacute;gico<sup>15-18</sup>.    Foi constatado que 6% da popula&ccedil;&atilde;o civil americana (10,8 milh&otilde;es    de pessoas) apresentaram dores na regi&atilde;o da articula&ccedil;&atilde;o    temporomandibular (ATM) ou na face/bochecha nos &uacute;ltimos seis meses, sintomas    que estavam comumente associados &agrave;s DTMs<sup>19</sup>.</font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">&Eacute; prop&oacute;sito    deste trabalho estudar a poss&iacute;vel base gen&eacute;tica no desenvolvimento    das DTMs por meio do estudo gen&eacute;tico-bioqu&iacute;mico eletrofor&eacute;tico    da haptoglobina de pacientes acometidos por algia cr&ocirc;nica ocasionada por    desordens temporomandibulares. Dessa forma, este trabalho caracterizou o padr&atilde;o    eletrofor&eacute;tico do complexo hemoglobina-haptoglobina em pacientes com    algia cr&ocirc;nica por DTMs e em indiv&iacute;duos normais, sem nenhuma dor    corporal; al&eacute;m disso, pesquisou poss&iacute;veis associa&ccedil;&otilde;es    entre o polimorfismo do complexo hemoglobina-haptoglobina e a algia cr&ocirc;nica    por DTMs.</font></p>     <p>&nbsp;</p>     ]]></body>
<body><![CDATA[<p><font face="Verdana, Arial, Helvetica, sans-serif" size="3"><b>Sujeitos e m&eacute;todo</b></font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">O presente trabalho    foi aprovado pelo Comit&ecirc; de &Eacute;tica em Pesquisa da Faculdade de Odontologia    de Ara&ccedil;atuba (protocolo nº 2007-00151).</font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">Foram coletados,    em seringas heparinizadas, 0,5 mL de sangue total venoso de 124 indiv&iacute;duos    adultos, selecionados aleatoriamente quanto a g&ecirc;nero, idade e ra&ccedil;a.    Esses foram divididos em: Grupo I - 100 indiv&iacute;duos portadores de algia    cr&ocirc;nica por DTMs, registrados no Servi&ccedil;o de Dor Orofacial do Centro    de Oncologia Bucal (COB) e na Cl&iacute;nica de Estomatologia da Faculdade de    Odontologia de Ara&ccedil;atuba/Unesp; Grupo II - 24 indiv&iacute;duos volunt&aacute;rios,    formado por alunos e docentes da Unesp/Campus de Botucatu, sem nenhuma dor corporal.</font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">O diagn&oacute;stico    das DTMs baseou-se principalmente na an&aacute;lise conjunta dos dados da hist&oacute;ria    da doen&ccedil;a, sinais e sintomas, al&eacute;m dos achados dos exames radiogr&aacute;ficos    de rotina<sup>12,14,17,20</sup>.</font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">A determina&ccedil;&atilde;o    dos fen&oacute;tipos do sistema Hb-Hp foi feita no Laborat&oacute;rio de Gen&eacute;tica    da Faculdade de Medicina Veterin&aacute;ria da FOA/Unesp por meio de eletroforese    horizontal<sup>1</sup>; modificando o meio suporte para &aacute;gar-amido<sup>21</sup>.</font></p>     <p>&nbsp;</p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="3"><b>Resultados e    discuss&atilde;o</b></font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">O estudo cl&iacute;nico    revelou como resultado de maior significado os seguintes tipos cl&iacute;nicos    diagnosticados de DTMs: artralgia (sinovite, capsulite, retrodiscite), em 94%    dos casos; artralgia associada a deslocamento do disco sem redu&ccedil;&atilde;o    e desordem miofacial, em 25% dos casos; artralgia associada ao deslocamento    do disco sem redu&ccedil;&atilde;o, desordem miofacial e desordem espinocervical,    em 20% dos casos (<a href="#f1">Fig. 1</a>).</font></p>     <p><a name="f1"></a></p>     <p>&nbsp;</p>     ]]></body>
<body><![CDATA[<p align="center"><img src="/img/revistas/rfo/v15n1/12f01.jpg"></p>     <p>&nbsp;</p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">Os resultados do    estudo laboratorial do polimorfismo gen&eacute;tico bioqu&iacute;mico do sistema    hemoglobina-haptoglobina demonstraram que o gen&oacute;tipo HbA-A esteve presente    em 95,96% da amostra e o gen&oacute;tipo HbA-B, em 4,04% (<a href="#f2">Fig.    2</a>); o gen&oacute;tipo Hp1-1 esteve presente significativamente (<i>p</i>    &lt; 0,0001) em 85,48% da amostra e em 100% dos pacientes estudados, independentemente    do tipo cl&iacute;nico da DTM diagnosticada. O gene Hp1 prevaleceu nas mulheres    (77 casos no g&ecirc;nero feminino e 8 no masculino) e na ra&ccedil;a branca    (69 casos). A anahaptoglobinemia (Hp0) foi detectada em 14,52% da amostra (14    mulheres e 4 homens) e com maior frequ&ecirc;ncia na ra&ccedil;a branca (10,48%).</font></p>     <p><a name="f2"></a></p>     <p>&nbsp;</p>     <p align="center"><img src="/img/revistas/rfo/v15n1/12f02.jpg"></p>     <p>&nbsp;</p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">Os gen&oacute;tipos    Hp2-1 e Hp2-2 foram detectados, respectivamente, em 8,87% e 3,23% dos indiv&iacute;duos    e apenas no grupo de controle. Entretanto, no grupo de pacientes com algia cr&ocirc;nica    por desordens temporomandibulares houve o monomorfismo para o sistema Hb-Hp    e para a haptoglobina Hp1-1 em indiv&iacute;duos do g&ecirc;nero feminino e    da ra&ccedil;a branca, independentemente do tipo cl&iacute;nico da DTM. Sugere-se,    portanto, que a haptoglobina Hp1-1 participa da etiopatogenia da algia cr&ocirc;nica    por desordens temporomandibulares.</font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">Neste trabalho,    no que se refere &agrave; condi&ccedil;&atilde;o de se ter o gen&oacute;tipo    Hp1-1 como associado &agrave; suscetibilidade para o desenvolvimento de DTMs,    encontra-se respaldo na literatura consultada, visto que muitos autores sugerem    o polimorfismo da haptoglobina com determinados gen&oacute;tipos como marcadores    de suscetibilidade a infec&ccedil;&otilde;es, inflama&ccedil;&otilde;es e processos    degenerativos. As leucemias, a artrite reumatoide juvenil e as talassemias do    tipo beta mostraram-se associadas significativamente &agrave; haptoglobina<sup>1</sup>;    e o gen&oacute;tipo Hp1-1, associado &agrave; cirrose hep&aacute;tica<sup>22</sup>.    Em pacientes coronarianos, o gen&oacute;tipo Hp2-2 &eacute; um fator angiog&ecirc;nico    positivo, ao passo que o gen&oacute;tipo Hp 1-1 apresenta maior risco de mortalidade    coronariana, obesidade e diabetes<sup>23-25</sup>; o que foi confirmado por    outros autores<sup>5,25</sup>. Diab&eacute;ticos com o gen&oacute;tipo Hp 2-2    apresentaram significativamente mais nefropatias, retinopatias e doen&ccedil;as    cardiovasculares do que diab&eacute;ticos com os gen&oacute;tipos Hp1-1 e Hp1-2<sup>25,26</sup>.</font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">O gene Hp1 foi    associado significativamente com alguns tipos de tumores: c&acirc;ncer ovariano<sup>27,28</sup>;    tumores mam&aacute;rios malignos (associados ao gen&oacute;tipo Hp1-1), carcinomas    de c&eacute;rvix (associados ao Hp1-2)<sup>29</sup>; adenocarcinoma de pulm&atilde;o    (mulheres com o gen&oacute;tipo Hpt1-1)<sup>30</sup>; c&acirc;ncer de es&ocirc;fago    (gen&oacute;tipo Hpt 1-2), c&acirc;nceres g&aacute;strico<sup>31</sup>; renal<sup>32</sup>    e de bexiga<sup>33</sup> (associados ao gen&oacute;tipo Hpt 1-1) e c&acirc;ncer    de pulm&atilde;o em pacientes sem hist&oacute;rico familial (associado ao gen&oacute;tipo    Hp2-2)<sup>30</sup>. Sugeriu-se<sup>5</sup> o gen&oacute;tipo homozigoto haptoglobina    Hp1-1 como marcador para a osteoporose p&oacute;s-menopausa em mulheres. Em    estudos com pacientes com leucemia, nenhuma associa&ccedil;&atilde;o foi verificada    entre leucemia com Hp1-1, como sugere a literatura; entretanto, observou-se    maior preval&ecirc;ncia de haptoglobin&ecirc;micos entre os pacientes leuc&ecirc;micos<sup>34</sup>.</font></p>     ]]></body>
<body><![CDATA[<p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">Os resultados deste    trabalho v&ecirc;m se somar &agrave;queles da literatura, que sugerem uma poss&iacute;vel    base gen&eacute;tica na etiopatogenia das desordens temporomandibulares. Por    exemplo: a matriz extracelular da cartilagem da ATM &eacute; muito afetada por    atividades celulares, incluindo-se a express&atilde;o g&ecirc;nica<sup>24,35</sup>;    existe uma prov&aacute;vel base gen&eacute;tica no desenvolvimento dos processos    inflamat&oacute;rios e degenerativos da ATM em alguns pacientes<sup>36</sup>.</font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">A base gen&eacute;tica    para as DTMs tamb&eacute;m encontra suporte no estudo etiol&oacute;gico da artrite    reumatoide, na medida em que h&aacute; evid&ecirc;ncias n&atilde;o s&oacute;    do papel imunol&oacute;gico e neural no seu desenvolvimento, como da participa&ccedil;&atilde;o    do fator gen&eacute;tico na sua etiopatogenia, considerando-se que a artrite    reumatoide &eacute;, dentre as doen&ccedil;as artr&iacute;ticas, a que mais    acomete a ATM de pacientes com desordens temporomandibulares<sup>37,38</sup>.</font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">Neste trabalho,    quanto &agrave; constata&ccedil;&atilde;o da preval&ecirc;ncia da Hp1-1 em mulheres,    indicando monomorfismo para Hp1 para as mulheres da amostra estudada, encontra-se    suporte na literatura<sup>39</sup> quando se deduz que ra&ccedil;a branca e    g&ecirc;nero feminino seriam significativamente prevalentes na DTM por osteoartrite    secund&aacute;ria em raz&atilde;o de uma predisposi&ccedil;&atilde;o gen&eacute;tica,    e nos informes da Ciba Collection<sup>40</sup>; ao afirmarem que um gene dominante    nas mulheres e recessivo nos homens poderia estar envolvido na heran&ccedil;a    da osteoartrite. Portanto, sugere-se no presente trabalho que Hp1 represente    um gene dominante para mulheres e recessivo para homens quando na presen&ccedil;a    de algia cr&ocirc;nica por desordens temporomandibulares.</font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">No referente ao    estudo haptoglobina <i>versus</i> ra&ccedil;a, h&aacute; varia&ccedil;&atilde;o    das frequ&ecirc;ncias dos genes Hp1, Hp2 e aus&ecirc;ncia de haptoglobina (anahaptoglobinemia)    ou ocorr&ecirc;ncia de dele&ccedil;&atilde;o do gene promotor da cadeia alfa    Hp1<sup>10</sup> entre as ra&ccedil;as humanas<sup>1,41</sup>. Existe preval&ecirc;ncia    do gene Hp1 em negros da &Aacute;frica, seguidos de leucodermas da Europa e    amarelos da &Aacute;sia; h&aacute; tamb&eacute;m subtipos de Hp1 (HpF e HpS)    em ind&iacute;genas mexicanos<sup>42</sup>.</font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">No presente trabalho    constatou-se que o gen&oacute;tipo Hp1 (91 casos) esteve presente na ra&ccedil;a    branca (75 casos; 60,48%), seguido da ra&ccedil;a negra (13 casos; 10,48%),    da amarela (2 casos; 1,61%) e vermelha (1 caso; 0,81%).</font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">A ana-haptoglobinemia    apresentou-se em 18 casos, sendo 13 na ra&ccedil;a branca, quatro na negra e    uma na amarela.</font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">Quanto &agrave;    haptoglobina <i>versus</i> hist&oacute;ria familial, houve correla&ccedil;&atilde;o    positiva entre Hp1-1 e hist&oacute;ria familial para dores na face e artrite    reumatoide (27 casos, correspondendo a 90% dos casos de hist&oacute;ria familial    positiva), indicando evid&ecirc;ncia da participa&ccedil;&atilde;o gen&eacute;tica    do sistema Hb-Hp no desenvolvimento das DTMs.</font></p>     <p>&nbsp;</p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="3"><b>Conclus&atilde;o</b></font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">O monomorfismo    da haptoglobina Hp1 esteve presente em 85% dos pacientes (mulheres da ra&ccedil;a    branca) com DTMs, independentemente do tipo cl&iacute;nico da DTM diagnosticada.    Isso sugere a haptoglobina Hp1-1 como um prov&aacute;vel marcador gen&eacute;tico    de suscetibilidade para o desenvolvimento de algia cr&ocirc;nica por DTMs. O    m&eacute;todo gen&eacute;tico-bioqu&iacute;mico eletrofor&eacute;tico do sistema    Hb-Hp mostrou-se v&aacute;lido para o estudo da etiopatogenia gen&eacute;tica    das DTMs, al&eacute;m de ser de baixo custo, simples e bem aceito pelo paciente.    Finalizando, sugere-se que novos estudos nesta linha sejam realizados para melhor    compreender os resultados obtidos neste trabalho.</font></p>     ]]></body>
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<body><![CDATA[<br>   Faculdade de Odontologia de Ara&ccedil;atuba/Unesp    <br>   Centro de Oncologia Bucal    <br>   Departamento de Patologia e Proped&ecirc;utica Cl&iacute;nica    <br>   Rua Jos&eacute; Bonif&aacute;cio, 1193, Vila Mendon&ccedil;a, Caixa Postal 341    <br>   16015-050 Ara&ccedil;atuba - SP    <br>   Fone/fax: (18) 3636-3275 / 3636-3332    <br>   E-mail: <a href="mailto:moraes@foa.unesp.br">moraes@foa.unesp.br</a></font></p>     <p><font face="Verdana, Arial, Helvetica, sans-serif" size="2">Recebido: 28.09.2009    <br>   Aceito: 20.11.2009</font></p>      ]]></body>
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