Characterization of cytokine profile to distinguish latent tuberculosis from active tuberculosis and healthy controls
CYTOKINE
Authors: He, Jianqin; Fan, Yumei; Shen, Dongni; Yu, Mengjia; Shi, Lingfang; Ding, Shiping; Li, Lanjuan
Abstract
Background: Tuberculosis (TB) is an infectious disease and its mortality rate ranks first. Latent tuberculosis infection (LTBI) means that a patient is infected with Mycobacterium tuberculosis, but has no relative clinical symptoms. It has been estimated that approximately 10% of patients with LTBI would develop into active tuberculosis. Therefore, it was urgent to search for more efficient biomarkers to discriminate LTBI from healthy population. Methods: The Luminex assay was employed to detect the quantity of cytokines secreted by mononuclear cells from peripheral blood stimulated with the ESAT6 protein among TB, LTBI and healthy controls. The cytokine profile was analyzed by principal components analysis and the receiver operating characteristic curve analysis. Results: The principal components analysis indicated that LTBI and TB were clearly separated from healthy controls, and that LTBI was also successfully differentiated from healthy controls. The cytokine profiling method to distinguish LTBI from healthy controls has a sensitivity and specificity of 100%. Nine potential biomarkers, including IL-23, IL-21, HGF, Bngf, IL-27, IL-31, IL-15, IL-22 and IL-18, were identified, and these cytokines were considered as a potential cytokine complex for more effectively discriminating LTBI from healthy controls. Conclusion: IL-23, IL-21, HGF, Bngf, IL-27, IL-31, IL-1 beta, IL-22 and IL-18 were demonstrated to be the potential cytokine complex for the assessment between LTBI and healthy controls.
Physicochemical characterization and cytotoxicity of articaine-2-hydroxypropyl-beta-cyclodextrin inclusion complex
NAUNYN-SCHMIEDEBERGS ARCHIVES OF PHARMACOLOGY
Authors: Burga-Sanchez, Jonny; Ferreira, Luiz Eduardo Nunes; Volpato, Maria Cristina; Cabeca, Luis Fernando; Braga, Mario; Fraceto, Leonardo Fernandes; de Paula, Eneida; Groppo, Francisco Carlos
Abstract
Articaine (ATC) is one of the most widely used local anesthetics in dentistry. Despite its safety, local toxicity has been reported. This study aimed to develop an ATC-2- hydroxypropyl-beta-cyclodextrin inclusion complex (ATC HP beta CD) and to assess its toxicity in vitro. The inclusion complex was performed by solubilization, followed by a fluorimetric and job plot assay to determine the complex stoichiometry. Scanning electron microscopy, DOSY- 1 H-NMR, differential scanning calorimetry (DSC), and sustained release kinetics were used to confirm the inclusion complex formation. In vitro cytotoxicity was analyzed by MTT assay and immunofluorescence in HGF cells. Fluorimetric and job plot assay determined the inclusion complex stoichiometry (ATC:HP beta CD = 1:1) and complex formation time (400 min), as indicated by a strong host/guest interaction (K-a = 117.8 M - 1), complexed fraction (f = 41.4%), and different ATC and ATC HP beta CD melting points (172 degrees C e 235 degrees C, respectively). The mean of cell viability was 31.87% and 63.17% for 20-mM ATC and 20-mM ATC HP beta CD, respectively. Moreover, remarkable cell toxicity was observed with free ATC by immunofluorescence. These results indicate the ATC HP beta CD complex could be used to improve the safety of ATC. Further research are needed to establish the anesthetic safety and effectiveness in vivo .