细支气管肺泡癌葡萄糖易化扩散转运蛋白-1表达特点及与^(18)F-脱氧葡萄糖摄取的关系

Relationship Between Characteristic of Expression of Facilitative Glucose Transporter-1 in Bronchial Aveolar Carcinoma and Fluorine-18 Fluorodeoxyglucose Uptake

目的探讨葡萄糖易化扩散转运蛋白-1(Glut1)在细支气管肺泡癌(BAC)组织中表达的特点及与18F-脱氧葡萄糖(18F-FDG)摄取之间的关系。方法20例BAC患者术前行18F-FDG正电子发射体层显像(PET)检查,检测肿瘤最大标准摄取值(SUVmax)、平均标准摄取值(SUVmean)及正常肺组织标准摄取值(SUVlung)。采用标准链霉菌抗生物素蛋白-过氧化物酶亲和(SP)免疫组织化学染色法对肿瘤与周围正常支气管肺组织的Glut1表达情况进行检测,观察其染色阳性细胞率与染色强度。结果20例患者肿瘤的18F-FDG摄取高于相应的正常肺组织(SUVmax、SUVmean和SUVlung分别为3.09±1.35,2.37±1.03和0.39±0.09)。20例BAC组织均有Glut1的表达(阳性细胞率73.8%±14.8%,染色强度2.8±0.9级),但肿瘤组织普遍表现为胞浆着色,染色强度较弱。正常支气管肺组织无Glut1表达1。8F-FDG摄取和Glut1表达与肿瘤大小呈正相关(P<0.01)。结论BAC组织中Glut1表达有其自身的特点,与18F-FDG摄取有关。

Objective To investigate the characteristic of the expression of facilitative glucose transporter 1 （Glut1） in bronchial aveolar carcinoma （BAC） and the relationship between expression of Glutl and fluorine-18 fluorodeoxyglucose （^18F-FDG） uptake. Methods Twenty patients with BAC were imaged with ^18F-FDG positron emission tomography （PET） before surgery. Maximum standard uptake value （SUVmax） and mean standard uptake value （SUVmean ） of tumor and standard uptake value of normal lung （SUVIung） were measured. The expression of Glutl was studied in paraffin sections by streptavidin peroxidase （SP） immunohistochemistry. Results All tumors of the patients could be detected by ^18F-FDG-PET.^ 18F-FDG uptake of tumor was higher than that of normal lung （SUV SUV and SUVlong were 3.09± 1.35, 2.37±1.03 and 0.39±0.09 respectively）. The expression of Glutl were positive in all tumors （73. 8%± 14. 8% of positive cell rate, 2. 8 ± 0. 9 grade of staining intensity）. Predominantly cytoplasm positive with weak staining intensity were observed in many tumors. Glutl negtive were observed in normal bronchial and lung parenchyma. Positive correlations were found among ^18F-FDG uptake, Glut1 expression and tumor size （P〈0. 01）. Conclusion Glutl expression with peculiarity in BAC is correlate with ^18F-FDG uptake.