CAJ | 학술논문

目的研究131I-RC-160(伐普肽)对转染人生长抑素受体二型(SSTR2)的A549(A549-SSTR2)肺腺癌移植瘤的抑制作用.方法建立A549-SSTR2肺腺癌裸鼠皮下移植瘤模型,同时建立pcDNA3质粒转染组的A549(A549-pc3)肺腺癌移植瘤模型作对照,观察131I-RC-160、RC-160、Na131I对移植瘤的抑制作用,等量的生理盐水作空白对照.治疗结束后,计算抑瘤率,随后处死裸鼠,取肿瘤组织作HE染色和免疫荧光染色,观察瘤组织的病理变化.采用SPSS 11.0软件对数据进行统计学处理.结果 A549-SSTR2细胞致瘤组中,131I-RC.160组和RC-160组的移植瘤生长明显受抑[抑瘤率分别为(75.1±4.2)%和(45.2±3.7)%],且131I-RC-160的抗肿瘤增殖效应较RC-160明显提高,差异有统计学意义(t=-6.165,P＜0.01);HE染色显示131I-RC-160组的肿瘤组织大部分片状坏死,残留少量瘤细胞,RC-160组肿瘤组织也可见片状坏死,但不如131I-RC-160组明显;免疫荧光染色显示131I-RC-160组和RC-160组的坏死区域荧光强度明显减弱,未坏死区域与生理盐水对照组无明显差异,可见明亮的绿色荧光.A549-pc3细胞致瘤组中,131I-RC-160和RC-160对瘤体有较弱的抑制效应[抑瘤率分别为(18.4 ±3.9)%和(15.2±3.4)%],与生理盐水组差异均无统计学意义(t值分别为-0.261和-0.302,P＞0.1);HE染色显示可见点状坏死,未见明显片状坏死;免疫荧光染色各组均未见明显的绿色荧光.Na131I组对转染或未转染SSTR2的移植瘤抑制作用与生理盐水组差异无统计学意义.结论将SSTR2转染至不表达SSTR2的肿瘤后,可以介导放射性核素对肿瘤进行靶向杀伤效应,提高对这类肿瘤的治疗效果,为外源性受体基因介导放射性核素靶向性内照射治疗肿瘤提供依据.
목적 연구131I-RC-160(벌보태)대전염인생장억소수체이형(SSTR2)적A549(A549-SSTR2)폐선암이식류적억제작용.방법 건립A549-SSTR2폐선암라서피하이식류모형,동시건립pcDNA3질립전염조적A549(A549-pc3)폐선암이식류모형작대조,관찰131I-RC-160、RC-160、Na131I대이식류적억제작용,등량적생리염수작공백대조.치료결속후,계산억류솔,수후처사라서,취종류조직작HE염색화면역형광염색,관찰류조직적병리변화.채용SPSS 11.0연건대수거진행통계학처리.결과 A549-SSTR2세포치류조중,131I-RC.160조화RC-160조적이식류생장명현수억[억류솔분별위(75.1±4.2)%화(45.2±3.7)%],차131I-RC-160적항종류증식효응교RC-160명현제고,차이유통계학의의(t=-6.165,P＜0.01);HE염색현시131I-RC-160조적종류조직대부분편상배사,잔류소량류세포,RC-160조종류조직야가견편상배사,단불여131I-RC-160조명현;면역형광염색현시131I-RC-160조화RC-160조적배사구역형광강도명현감약,미배사구역여생리염수대조조무명현차이,가견명량적록색형광.A549-pc3세포치류조중,131I-RC-160화RC-160대류체유교약적억제효응[억류솔분별위(18.4 ±3.9)%화(15.2±3.4)%],여생리염수조차이균무통계학의의(t치분별위-0.261화-0.302,P＞0.1);HE염색현시가견점상배사,미견명현편상배사;면역형광염색각조균미견명현적록색형광.Na131I조대전염혹미전염SSTR2적이식류억제작용여생리염수조차이무통계학의의.결론 장SSTR2전염지불표체SSTR2적종류후,가이개도방사성핵소대종류진행파향살상효응,제고대저류종류적치료효과,위외원성수체기인개도방사성핵소파향성내조사치료종류제공의거.
Objective The radionuclide tracing technique has an important role in the targeted diagnosis and therapy in oncology.The aim of the paper was to observe the inhibition induced by 131I-RC-160 (Vapreotide)on a somatostatin receptor subtype 2(SSTR2)transfected A549(A549-SSTR2)lung adenocarcinoma in nude mice.Methods The tumor model of A549 lung carcinoma transfected with SSTR2 (A549-SSTR2)was established in nude mice,with the same tumor cells transfected with plasmid pcDNA3 (A549-pc3)as control in the other side of body.The inhibition effects of 131-RC-160,RC-160.Na 131I and normal saline(NS)on the tumors were observed.The tumor volume was determined at the end of studv and the tissue samples was HE stained and fluorescence immunocytochemistry analyzed.SPSS 11.0 was used for data analysis.Results In A549-SSTR2 tumors.the growth of the tumors was inhibited by 131I-RCz-160 and RC-160[(75.1±4.2)%and(45.2±3.7)%],and anti-proliferation of 131I-RC-160 was stronger than that of RC-160(t=-6.165,P＜0.01).HE stain showed that bulk lamellar cellular necrosis occurred in up to 80% of tumor volume after 131I-RC-160. Fluorescence immunocytochemistrv proved necrosis of 131I-RC-160 and RC-160 treated tumors.In the A549-pc3 tumor,only slight inhibition effect of 131I-RC-160 and RC-160 on the tumors was observed[(18.4±3.9)%and(15.2 ±3.4)%,t was-0.261.-0.302.respectively,P＞0.1(compared with NS group)].Only was punctiform cellular necrosis in HE stain observed.Na 131I had no inhibition on either tumor models.Conclusion SSTR2 transfection might enhance receptor gene-mediated internal radiotherapy of human cancer.