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1.
Int. j. odontostomatol. (Print) ; 7(3): 433-440, Dec. 2013. ilus
Artigo em Inglês | LILACS | ID: lil-696575

RESUMO

Antibody levels to some periodontal pathogens are associated with enhanced levels of inflammatory markers. The purpose of the current study was to examine the relative contribution of serum immunoglobulin G (IgG) subclass antibody level factors and local factors on the probing pocket depth in chronic periodontitis. Serum samples were taken from 444 patients diagnosed with moderate and severe periodontitis and 223 control subjects. The IgG subclass antibody titers to Porphyromonas gingivalis (Pg), Aggregatibacter actinomycetemcomitans (Aa) and Tanerella forsythia (Tf) using indirect immunoassay (ELISA) were determined. The relative contribution of patient, tooth and site-associated parameters on the probing pocket depth were evaluated with a hierarchical multilevel model. The results indicated that periodontitis patients had detectable levels of IgG1 and IgG2. High IgG1 and IgG2 antibody levels against Aa occurred in 132 and 142 periodontitis patients, respectively. High IgG1 and IgG2 antibody levels against Pg occurred in 141 and 138, periodontitis patients, respectively, and High IgG1 and IgG2 antibody levels against Tf occurred in 121 and 136 periodontitis patients, respectively. The majority of the variance was attributed to the site level (48 percent). The multilevel analysis associated deeper probing depth with subject factors (serum IgG1 and IgG2 antibody to Pg and Aa), tooth factors (tooth type), and site factors (mesial-distal location and bleeding on probing). Elevated serum IgG1 and IgG2 antibody to Pg and Aa (subject factors) reflects destructive periodontal disease status.


Los niveles de anticuerpos en algunos patógenos periodontales están asociados con mayores niveles de marcadores inflamatorios. El propósito de este estudio fue examinar la contribución relativa de inmunoglobulina sérica G (IgG) factores de nivel de anticuerpos de subclase y factores locales en la profundidad del sondaje en periodontitis crónica. Se tomaron muestras de suero de 444 pacientes con diagnóstico de periodontitis moderada y grave y de 223 sujetos de control. Se determinaron los títulos de anticuerpos IgG subclase a Porphyromonas gingivalis (Pg), Aggregatibacter actinomycetemcomitans (Aa) y Tanerella forsythia (Tf) mediante inmunoensayo indirecto (ELISA). La contribución relativa de los pacientes, los dientes, y el sitio asociado a los parámetros en la profundidad de sondaje fueron evaluados con un modelo multinivel jerárquico. Los resultados indicaron que los pacientes con periodontitis tenían niveles detectables de IgG1 e IgG2. Altos niveles de anticuerpos IgG1 e IgG2 contra Aa fueron observados en 132 y 142 pacientes con periodontitis, respectivamente. Niveles altos de anticuerpos IgG1 e IgG2 contra Pg fueron detectados en 141 y 138 en pacientes con periodontitis respectivamente, y niveles altos de anticuerpos IgG1 e IgG2 contra Tf se produjeron en 121 y 136 pacientes con periodontitis, respectivamente. La mayor parte de la varianza se atribuyó a nivel de sitio (48 por ciento). El análisis multinivel asociados a profundidad de sondaje con factores relacionados a los sujetos, anticuerpos (suero IgG1 e IgG2 Aa y Pg), factores de los dientes (tipo) y los factores del sitio (localización mesial - distal y sangrado al sondaje). Anticuerpos elevados de suero IgG1 e IgG2 Aa y Pg (factores de los sujetos) reflejan el estado de la enfermedad periodontal destructiva.


Assuntos
Humanos , Masculino , Adulto , Feminino , Pessoa de Meia-Idade , Imunoglobulina G , Periodontite Crônica/imunologia , Periodontite Crônica/microbiologia , Anticorpos , Aggregatibacter actinomycetemcomitans/imunologia , Ensaio de Imunoadsorção Enzimática , Análise Multinível , Porphyromonas gingivalis/imunologia , Análise de Regressão , Medição de Risco
2.
Rev. méd. Chile ; 141(9): 1182-1189, set. 2013. ilus, tab
Artigo em Espanhol | LILACS | ID: lil-699686

RESUMO

Spondyloarthritis is a group of several related but phenotypically distinct chronic inflammatory diseases, characterized by progressive new bone formation which leads to ankylosis and functional disability. Radiographic images evidence not only erosive changes but also overgrowth of bony structures called syndesmophytes. These inflammation, bone destruction and new bone formation are located in the entheses, which constitutes the primary organ of the disease. As a consequence, the inflammatory process results in excess of bone formation and the impact depends on the location, cell type, cytokines and local microenvironment factors. Several molecules playing a role as immune modulators or regulators of bone homeostasis, mediate the imbalance between bone resorption and formation. In the same way, animal models suggest that joint ankylosis may be independent from the effects of tumor necrosis factor alpha. Therefore, the process of new tissue (bone) formation can be considered as an additional therapeutic target. The Wnt signaling pathway, which is considered the primary regulator of osteoblastogenesis, constitutes a new research field of great interest in the last decade.


Assuntos
Humanos , Remodelação Óssea/fisiologia , Ossificação Heterotópica/fisiopatologia , Espondilartrite/fisiopatologia , Biomarcadores , Doença Crônica , Ossificação Heterotópica/terapia , Espondilartrite/terapia
3.
Acta odontol. venez ; 46(2): 227-233, jun. 2008.
Artigo em Espanhol | LILACS | ID: lil-630020

RESUMO

En general es aceptado que la  condición  inmune innata y/o adaptativa puede afectar  la respuesta inmune local, incluyendo al periodonto y dentro de la progresión de la enfermedad  es crítico poder determinar la naturaleza de la respuesta inflamatoria generada por el reto microbiano antigénico subgingival. Existen controversias en la literatura a nivel mundial con respecto al papel de los linfocitos T en la enfermedad periodontal, el entendimiento de su naturaleza y la regulación  de estas células puede estar asociado a condiciones protectoras  o destructivas no estando claro aún los eventos inflamatorios o antiinflamatorios en donde la respuesta inmune celular mediada por células T  puede estar ausente o  deficiente  durante el curso de la infección periodontal. De hecho las opiniones son divididas, algunas señalan que la principal función de estas células  es la de proteger al huésped contra los microorganismos periodontopáticos, mientras que otros han demostrado su participación activa en el inicio y progresión de la enfermedad periodontal,  por esta razón la presente revisión pretende discutir  su participación dentro de la patogenia de la periodontitis  para tratar de esclarecer los mecanismos protectores y  aquellos que pueden estar relacionados con la destrucción del tejido de soporte del diente; lo cual es importante ya que nos permitiría comprender nuevos enfoques terapéuticos para esta enfermedad


In general is accepted that the innate or adaptive immunity affect the local immune response including the periodontium and in the progression of the disease is critical determinate the nature of the inflammatory response produced by the subgingival bacterial challenge. There are controversies in the literature about the role of T lymphocytes in the periodontal disease, the nature and regulation of these cells can be associated to protective o destructive conditions, but today is not clear the inflammatory or anti-inflammatory events where the cellular immune response by T cells can be absent o deficient during the course of periodontal infection. In fact the opinions about this subject are divided: some of these indicate that the main function of this cells is to protect the host against the periodontal bacteria while another had demonstrated that them participate in the beginning and progression of periodontal disease, for this reason this reviews pretend to discuss their participation in the pathogenesis of this pathology and to know the protective and destructive mechanisms relate with the destruction of periodontal tissue, this is important because they let us to understand new ways for the treatment of this disease


Assuntos
Doenças Periodontais/diagnóstico , Pulpite , Linfócitos T , Periodontite
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