糖皮质激素受体 mRNA在慢性鼻窦炎鼻息肉组织中的表达

目的通过检测糖皮质激素受体(glucocorticoid receptor, GR)-α及β mRNA在接受鼻腔糖皮质激素治疗后不同疗效的两组患者鼻息肉黏膜的定量表达,探讨在不同组慢性鼻窦炎鼻息肉组织中GR-α和GR-β的表达意义.方法采用荧光定量反转录聚合酶链反应(FQ-RT-PCR)方法检测40例患者鼻息肉组织中GR-α mRNA和GR-β mRNA的定量表达.结果通过随访80例门诊患者后筛查出40例患者,其中激素敏感组26例,激素不敏感组14例.在激素不敏感鼻息肉组织中GR-β mRNA 表达(5.72±0.58)×102 拷贝/μg]均高于激素敏感组(4.82±0.28)×102拷贝/μg,t=-6.65,P<0.01]和正常鼻黏膜组(4.44±0.35)×102拷贝/μg,t=-9.19, P<0.01],并在该两组之间差异均有统计学意义.GR-α mRNA与GR-β mRNA的比值在激素敏感组(829.42±67.36)与激素不敏感组(535.70±89.00)间差异有统计学意义(t=11.74, P<0.01).结论慢性鼻-鼻窦炎患者中的GR-β mRNA高表达,GR-α mRNA表达下调提示激素不敏感的存在,GR-β在评价鼻息肉患者对激素治疗疗效上有一定作用.

Investigation of GR mRNA quantu expression in chronic sinusitis and nasal polyps

OBJECTIVE: To detect the expression of the glucocorticoid receptor-alpha/beta (GR-alpha/beta) mRNA in nasal polyp and normal nasal mucosa and investigate the significance of receptor-alpha/beta in GC-insensitive and GC-sensitive patients. METHODS: The expression of GR-alpha/beta mRNA in 40 samples of nasal polyp and 30 normal nasal mucosa was examined by using Fluorescent quantitative PCR. RESULTS: Forty cases were screened from the 80 cases after follow-up, including 26 cases of GC-sensitive and 14 cases of GC-insensitive. the levels of GR-beta mRNA in group of GC-insensitive (5.72 +/- 0.58) x 10(2) copy/microg] were significantly higher than that of GC-sensitive (4.82 +/- 0.28) x 10(2) copy/microg, t = -6.65, P < 0.01] and normal nasal mucosa (4.44 +/- 0.35) x 10(2) copy/microg, t = -9.19, P < 0.01]. There was difference between group of GC-insensitive and other two groups of GC-sensitive and normal nasal mucosa (P < 0.01). The ratio of GR-alpha/GR-beta showed significant difference between the group of GC-sensitive (829.42 +/- 67.36) and that of GC-insensitive (535.70 +/- 89. 00, t = 11.74, P < 0.01). CONCLUSIONS: The high expression of GR-beta mRNA and low expression of GR-alpha mRNA in nasal polyp show the status of "insensition" in chronic sinusitis and nasal polyp. The GR-beta may play an important role in evaluating the effect of glucocorticoid in chronic sinusitis and nasal polyps.