An optoelectronic cervical cancer screening system for screening cervical cancer: comparison with cervical cytology / 南方医科大学学报

<p><b>OBJECTIVE</b>To study the clinical value of optoelectronic cervical cancer screening system (TruScreen, TS) in the screening of cervical cancer in comparison with cervical cytology test.</p><p><b>METHODS</b>A total of 392 patients were screened by TS, Pap, TCT, and HPV using the pathological and colposcopical results as the golden standard. The sensitivity, specificity, Kappa value and the area of under ROC of each method and their combinations (parallel tests) were compared.</p><p><b>RESULTS</b>The sensitivity of TS, Pap, TCT and HPV were 32.2%, 42.2%, 74.4% and 47.8%, with specificity of 96.7%, 93.7%, 78.8% and 84.8% in detecting cervical cancer, respectively. The sensitivity of the parallel tests, namely TCT/HPV, TCT/TS, Pap/TS and HPV/TS were 65.6%, 87.8%, 82.2% and 86.7%, with the specificity of 81.1%, 74.5%, 75.8% and 67.2%, respectively. In light of the areas of under ROC, significant differences were noted between the parallel tests of TS/Pap and TS/TCT (P<0.05), but not between TCT/Pap and TCT/TS (P>0.05); significant differences were found between the parallel tests with TS and those without TS (P<0.05), but not between TS alone and the parallel tests incorporating TS (P>0.05), nor between the 4 parallel tests (P>0.05).</p><p><b>CONCLUSION</b>As a new modality for early screening of cervical carcinoma, TS offers a means for real-time cancer detection with better diagnostic efficacy than Pap and HPV and equivalent efficacy to TCT. The combination of TS and cytological tests can further enhance the diagnostic accuracy.</p>

Optimization of Fermentation Medium for S-adenosylmethionine Production by Candida sp.YQ5 / 微生物学通报

The optimized cultural medium of fermentation for Candida sp.mutant strain YQ5 to produce S-adenosylmethionine was studied.The results of single factor experiment showed that the most favorable pH value,carbon source,nitrogen source organic nutrient is 6.0,8% sucrose,1.5% tryptone and 2% yeast extract,respectively.As to inorganic salts,MgSO4?7H2O,CaCl2,FeSO4?7H2O,CoCl2,CuSO4?5H2O,H3BO3 could improve accumulation of the intercellular SAM.The ingredients of the culture medium are also opti-mized by the orthogonal experiment.Fermentation for 48 h under the optimal condition resulted in AdoMet production at 1740.0 mg/L.