Comparison of salivary levels of mucin and amylase and their relation with clinical parameters obtained from patients with aggressive and chronic periodontal disease

Objective Salivary mucin and amylase levels are increased in patients with chronic periodontitis (CP). Due to the fact that aggressive periodontitis (AgP) not only differs from chronic periodontitis in terms of its clinical manifestation, the aim of this study was to compare salivary mucin and amylase levels and their relation to the clinical parameters of patients with aggressive periodontitis with that of patients with chronic periodontitis. Material and Methods Eighty subjects were divided into two groups: 20 patients with AgP and their 20 matched controls and 20 patients with CP and their 20 matched controls, based on clinical attachment loss (CAL), probing pocket depth (PPD) and bleeding on probing (BOP). Whole unstimulated saliva was obtained and mucin, amylase and protein were determined by colorimetric methods. Pearson's correlation analysis was used to determine the relationship between salivary mucin, amylase and protein levels and the clinical parameters. Results Salivary mucin, amylase and protein levels were increased in patients with AgP and CP but there were no differences between them or between control groups. Pearson's correlation analysis, determined in the entire subjects studied, showed a positive and significant correlation of mucin, amylase and proteins with CAL and PPD and a negative correlation with the flow rate. When Pearson's correlation analysis was carried out in each group separately, Fisher's z transformation showed no significant difference between both groups. Conclusion Comparison of the salivary levels of mucin, amylase and protein and their relationship with clinical parameters of AgP patients with that of CP patients revealed no differences between both groups. .

Mucinas salivales: estructura química, mecanismos de liberación y participación en la defensa no inmunológica de la cavidad bucal / Salivary mucins: chemical structure, release mechanisms and participation in the non-immunological defense of the oral cavity

En este artículo se describen: 1) las características físico-químicas de las mucinas salivales, denominadas MG1 y MG2. 2) El mecanismo de secreción por estimulación simpática y parasimpática. 3) La distinta participación de MG1 y MG2 tanto en la actividad deglutoria como en los mecanismos de defensa de la cavidad bucal, en relación con sus propiedades físico-químicas. 4) El rol de las mucinas salivales en la protección de la mucosa del tracto gastrointestinal. 5) La relación entre las mucinas saliales y las patologías de la cavidad bucal.

Inhibitory effects of Diazepam in rat Vas Deferens: role of Calcium

Diazepam and Ro5-4864 effects on noradrenaline-induced rat vas deferend contractions were studied. We investigated whether central or peripheral type benzodiazepine receptors were involved, by studying the effects of the selective central or peripheral benzodiazepine receptor antagonists, flumazenil (Ro 151788) or PK 11195 respectively. Diazepam interactions with GABA, adenosine, theophylline, and hypercalcic medium (3.5mM) were studied. Also, we investigate diazepam effect on KC1 depolarized vas deferens. Results showed that diazepam (10(-4) to 1.7x10(-4) M)) and Ro 5-4864 (10(-5) to 5.5x10(-5)M) inhibited NA-induced vas deferens contractions and that neither flumazenil nor PK 11195 antagonized diazepam or Ro 5-4864 inhibitory effects respectively. GABA, adenosine and theophylline did not modify neither NA vas deferens response nor diazepam inhibitory action. Diazepam effect was significantly reduced in an 3.5 mM calcium medium and KC1 vas deferense was inhibited by diazepam 1.3x10(-5) and 1.3 x 10(-4) M. It is concluded that in rat vas deferens diazepam effect seems to be related with calcium mobilization.

Effects of calcium and its antagonists on histamine-induced leakage in rat skin

Se estudiaron los efectos del calcio, del lantano, de los bloqueantes de los canales del calcio de tipo L y de la trifluoperazina sobre el aumento de permeabilidad capilar provado por histamina, utilizando el método de la extravasación del azul de Evans en la piel de la rata. El efecto de la histamina fue inhibido por calcio 12,5 mM, lantano 1-10mM, nifedipina 0,1 y 1 µM y trifluoperazina 30 y 100 µM. Los efectos del calcio disminuyeron progresivamente a medida que las concentraciones se aumentaron hasta 10 mM. Los efectos inhibitorios fueron mayores al asociar nifedipina 0,1 µM o trifluoperazina 30 µM con calcio 3m. El efecto de la nifedipina 0,1 µM fue revertido por calcio 10mM, mientras que los efectos del lantano 1mM y trifluoperazina 30 µM no fueron modificados por esa concentración. Se propone que el efecto del calcio sobre el aumento de permeabilidad capilar inducido por histamina es el resultado de un balance entre un efecto inhibitorio extracelular y un efecto facilitador intracelular

Effects of calcium and EDTA on rat skin capillary permeability and on its response to histamine, serotonin and bradykinin

Para estudiar los efectos del calcio y el EDTA sobre la permeabilidad vascular y su respuesta a mediadores de la inflamación se utilizó el método de la extravasación del azul de Evans. El Ca2+ provocó una disminución concentración-dependeniente de la permeabilidad capilar. El EDTA en concentraciones 0.2 mM o mayores tuvo el efecto opuesto. La extravasación provocada por la inyección intradérmica de histamina 100 microng/ml, serotoninas 5 microng/ml y bradiquinina 5 microng/ml, fue menor cuando se innyectó en el mismo sitio Ca2+ 8mM y mayor en presencia de EDTA e mM. Los efectos del EDTA fueron inhibidos por el calcio. Estos resultados sugieren que, en la piel de la rata, el calcio disminuye la permeabilidad capilar y su respuesta a histamina, serotonina y bradiquinina