Jie Ding1, Chao Wang2, Xiaofeng Chang3,4. 1. Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, #87 Dingjiaqiao Road, Nanjing, 210009, China. dingjie711@seu.edu.cn. 2. Education Ministry's Key Laboratory of Developmental Genes and Human Diseases, Institute of Life Sciences, Southeast University, #2 Sipailou, Nanjing, 210096, China. 3. Jiangsu Key Laboratory of Molecular and Functional Imaging, Department of Radiology, Zhongda Hospital, Medical School, Southeast University, #87 Dingjiaqiao Road, Nanjing, 210009, China. 4. Department of Urology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University, #321 Zhongshan Road, Nanjing, 210008, China.
Abstract
PURPOSE: Luciferase modification of tumour cells enables early and non-invasive imaging to detect tumour growth in situ and could provide sensitive and effective detection of carcinoma during research and therapy. METHODS: Renca cells, a murine renal carcinoma cell line, were infected with lentivirus expressing luciferase to obtain Renca-luc. The proliferation, invasion, and migration of Renca and Renca-luc cell lines were compared using colorimetric, Boyden chamber, and wound-healing assays. Orthotopic tumour models were established in BALB/c mice using Renca and Renca-luc cells, and tumour growth in vivo was detected using bioluminescence imaging and magnetic resonance imaging (MRI). RESULTS: Intensity of luciferase signals from Renca-luc was positively correlated with cell number. Bioluminescence signal was detected 1 day after the establishment of the renal carcinoma model using Renca-luc and was significantly increased after 7 days. Tumour size at 7 days following the establishment of renal carcinoma models using Renca and Renca-luc was determined using MRI. The presence of renal model tumours was confirmed by histological staining. The expression of luciferase did not affect Renca cell characteristics in vitro or tumour growth in vivo. CONCLUSION: Luciferase labelling could provide a sensitive and non-invasive evaluation method for immunological and tumour therapy of renal carcinomas.
PURPOSE: Luciferase modification of tumour cells enables early and non-invasive imaging to detect tumour growth in situ and could provide sensitive and effective detection of carcinoma during research and therapy. METHODS: Renca cells, a murinerenal carcinoma cell line, were infected with lentivirus expressing luciferase to obtain Renca-luc. The proliferation, invasion, and migration of Renca and Renca-luc cell lines were compared using colorimetric, Boyden chamber, and wound-healing assays. Orthotopic tumour models were established in BALB/c mice using Renca and Renca-luc cells, and tumour growth in vivo was detected using bioluminescence imaging and magnetic resonance imaging (MRI). RESULTS: Intensity of luciferase signals from Renca-luc was positively correlated with cell number. Bioluminescence signal was detected 1 day after the establishment of the renal carcinoma model using Renca-luc and was significantly increased after 7 days. Tumour size at 7 days following the establishment of renal carcinoma models using Renca and Renca-luc was determined using MRI. The presence of renal model tumours was confirmed by histological staining. The expression of luciferase did not affect Renca cell characteristics in vitro or tumour growth in vivo. CONCLUSION: Luciferase labelling could provide a sensitive and non-invasive evaluation method for immunological and tumour therapy of renal carcinomas.
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