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Main Author:	J Díaz-Zúñiga
Format:	Artículo científico
Language:	es
Published:	Sociedad de Periodoncia de Chile 2013
Subjects:	Medicina citoquinas Células dendríticas Aggregatibacter actinomycetemcomitans
Online Access:	https://www.redalyc.org/articulo.oa?id=331028622001
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Variabilidad de la síntesis de citoquinas por células dendríticas humanas estimuladas con los distintos serotipos de Aggregatibacter actinomycetecomitans J Díaz-Zúñiga S Melgar-Rodríguez JP Yáñez C Álvarez C Rojas A Benítez P Ciuchi G Monasterio R Vernal Medicina citoquinas Células dendríticas Aggregatibacter actinomycetemcomitans Objetivo: Sobre la base de la antigenicidad del polisacárido O del LPS, en A. actinomycetemcomitans se describen distintos serotipos bacterianos y entre ellos se ha especulado una patogenicidad e inmunogenicidad diferente. El objetivo de este trabajo es analizar las diferencias en la síntesis de citoquinas producidas por células dendríticas cuando son estimuladas con los distintos serotipos de A. actinomycetemcomitans . Metodología: Células dendríticas diferenciadas a partir de monocitos circulantes periféricos humanos fueron estimuladas a MOIs=10 -1 -10 -2 con los serotipos a, b y c de A. Actinomycetemcomitans . Mediante PCR y ELISA se evaluaron los niveles de expresión y secreción de citoquinas. Resultados: En las células dendríticas, la producción de citoquinas fue diferente ante los distintos serotipos de A. actinomycetemcomitans , con mayores niveles de secreción de IL-1β, IL-6, IL-12, IL-23, IFN-γ y TNF-α cuando el microorganismo estimulante fue la cepa ATCC ® 43718™ (serotipo b). Conclusión: El serotipo b de A. actinomycetemcomitans posee un mayor potencial inmuno-estimulador de células dendríticas comparado con los otros serotipos bacterianos y potencialmente contribuiría a inducir un patrón de respuesta inmune tipo Th1 y/o Th17 durante las periodontitis. 2013 artículo científico 0718-5391 https://www.redalyc.org/articulo.oa?id=331028622001 es http://www.redalyc.org/revista.oa?id=3310 Revista Clínica de Periodoncia, Implantología y Rehabilitación Oral application/pdf Sociedad de Periodoncia de Chile Revista Clínica de Periodoncia, Implantología y Rehabilitación Oral (Chile) Num.2 Vol.6

if (filemtime($filename) + $maxlifetime < time()) { unlink($filename); $count++; } } return $count; } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ protected function saveSession($sessId, $data): bool { $sessFile = $this->path . '/sess_' . $sessId; if ($handle = fopen($sessFile, 'w')) { $return = false; // Lock the file for exclusive access to avoid issues with multiple // processes writing session simultaneously: if (flock($handle, LOCK_EX)) { $return = fwrite($handle, $data); // Make sure that there's no trailing data by truncating the file to // the correct length: ftruncate($handle, strlen($data)); fflush($handle); flock($handle, LOCK_UN); } fclose($handle); if ($return !== false) { return true; } } // If we got this far, something went wrong with the file output... // It is tempting to throw an exception here, but this code is called // outside of the context of exception handling, so all we can do is // echo a message.

// Anecdotal testing Today and Yesterday seems to indicate destroy() // is called by the garbage collector and everything is good. // Something to keep in mind though. return 0; } /** * Write function that is called when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ public function write($sessId, $data): bool { if ($this->writesDisabled) { return true; } return $this->saveSession($sessId, $data); } /** * A function that is called internally when session data is to be saved. * * @param string $sessId The current session ID * @param string $data The session data to write * * @return bool */ abstract protected function saveSession($sessId, $data): bool; }

* * @return void */ public function writeClose() { // The assumption is that we're using PHP's ext/session. // session_write_close() will actually overwrite $_SESSION with an // empty array on completion -- which leads to a mismatch between what // is in the storage object and $_SESSION. To get around this, we // temporarily reset $_SESSION to an array, and then re-link it to // the storage object. // // Additionally, while you _can_ write to $_SESSION following a // session_write_close() operation, no changes made to it will be // flushed to the session handler. As such, we now mark the storage // object isImmutable. $storage = $this->getStorage(); if (! $storage->isImmutable()) { $_SESSION = $storage->toArray(true); session_write_close(); $storage->fromArray($_SESSION); $storage->markImmutable(); } } /** * Attempt to set the session name * * If the session has already been started, or if the name provided fails * validation, an exception will be raised. * * @param string $name * @return SessionManager * @throws Exception\InvalidArgumentException */ public function setName($name) { if ($this->sessionExists()) { throw new Exception\InvalidArgumentException( 'Cannot set session name after a session has already started'

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