結(jié)核分枝桿菌培養(yǎng)濾液蛋白32的克隆表達(dá)及血清學(xué)診斷應(yīng)用
[Abstract]:Objective: to construct the recombinant plasmid of mycobacterium tuberculosis culture filtrate protein 32 (culture filtrate protein 32 CFP32 and express and purify the recombinant protein CFP32, in Escherichia coli to explore its application value in tuberculosis serological diagnosis. Methods CFP32 gene fragment was amplified by PCR and cloned into pET-21a expression vector. Purification of recombinant CFP32 protein by Ni-NTA affinity chromatography. An enzyme linked immunosorbent assay (ELISA) was established to detect CFP32 antibodies in 160 clinical serum samples. Results: the cfp32 gene was cloned, and the expression plasmid pET21a-cfp32,IPTG was constructed to induce the inclusion body of high expression CFP32 protein in Escherichia coli. SDS-PAGE electrophoresis was carried out at 30 KD. After renaturation of CFP32 protein with high purity, the protein content was 3.46 mg/mL.. A ELISA method for detection of tuberculosis antibody by CFP32 was established and optimized. 62 cases were positive for CFP32 antibody. The sensitivity was 63.9% in 25 cases of non-tuberculosis and 38 cases in healthy persons. The specificity was 96.8%. Conclusion: CFP32 protein was successfully expressed in Escherichia coli. The detection of serum antibody showed that the recombinant CFP32 protein might be one of the effective candidate proteins for the serological diagnosis of tuberculosis.
【學(xué)位授予單位】:蘇州大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2008
【分類號(hào)】:R378;R446.6
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