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Articles by Cristina Rodriguez-Padilla
Total Records ( 2 ) for Cristina Rodriguez-Padilla
  Ricardo Gomez-Flores , Diana Caballero-Hernandez , Richard J. Weber , Reyes Tamez-Guerra , Patricia Tamez-Guerra and Cristina Rodriguez-Padilla
  Norepinephrine (NE) has been associated not only with increasing blood pressure, atherosclerosis, heart disease, and other life threatening conditions, but also with altering immune responses by influencing leukocyte functions. In the present study, we evaluated the in vitro effects of NE on rat thymic lymphocyte and human peripheral blood mononuclear cells (HPBMC) functions. We observed that NE marginally, but significantly (P < 0.01) enhanced (1.3-fold increase) proliferation of rat thymic lymphocytes at 10-5 M, without altering HPBMC proliferation, as compared with untreated control. In addition, NE (10-5 M) significantly (P < 0.01) enhanced nitric oxide production (2.9 + 0.095 nmol/well) (which reduced 20% cell viability), and stimulated (P < 0.01) TNF-α production (4 + 0.16 pg/ml) by rat macrophages. NE (10-5 M) was also observed to induce 2-fold increase in mRNA signal of TNF-α, and stimulated that of IL-1 and IL-6 by HPBMC, as compared with untreated control. Taken together, these results indicated that NE was capable to activate in vitro rat and human lymphocyte and macrophage pro-inflammatory response.
  Carlos Ramirez-Pfeiffer , Efren Diaz-Aparicio , Ricardo Gomez-Flores , Cristina Rodriguez-Padilla , Alberto Morales-Loredo and Genoveva Alvarez-Ojeda
  The performance of the fluorescence polarization assay (FPA) using the recently described Brucella melitensis native hapten and the Brucella abortus O-polysaccharide tracer was evaluated and compared with those of The World Organization for Animal Health tests related to indirect and competitive enzyme-linked immunosorbent assays as classification variables for goat sera obtained from a high-prevalence area where vaccination was performed; test series were also evaluated to increase the final specificity of the tests. Our results showed that the respective relative sensitivity and specificity were 99.7% and 32.5% for the rose Bengal test with a 3% cell concentration (RBT3), 92.8% and 68.8% for the rose Bengal test with 8% cell concentration (RBT8), 98.4% and 84.9% for the Canadian complement fixation test (CFT), 83.7% and 65.5% for the Mexican CFT, 98.4% and 81.0% for the buffered plate agglutination test (BPAT), and 78.1% and 89.3% for the fluorescence polarization assay (FPA). The use of the FPA as the secondary test significantly increased the final specificities of test combinations; the screening tests BPAT, RBT3, and RBT8 plus FPA resulted in 90%, 91.2%, and 91.3% final specificities, respectively, whereas for the combinations RBT3 plus Mexican CFT, RBT8 plus Mexican CFT, and BPAT plus Canadian CFT, the specificities were 65.5%, 63.2%, and 91.7%, respectively. The results suggested that the FPA may be routinely applied as an adaptable screening test for diagnosis of goat brucellosis, since its cutoff can be adjusted to improve its sensitivity or specificity, it is a rapid and simple test, it can be the test of choice when specificity is relevant or when an alternative confirmatory test is not available, and it is not affected by vaccination, thus reducing the number of goats wrongly slaughtered due to misdiagnosis.
 
 
 
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