변이 도파민 2 수용체와 나트륨 옥소 공동 수송체 이입유전자의 이중 리포터시스템 개발 (Development of Dual Reporter System of Mutant Dopamine 2 Receptor (D2R) and Sodium Iodide Symporter (NIS) Transgenes) |
Author |
황도원1,2.이동수1,2.강주현2.장영수2.김윤희1,2.정재민2.정준기2.이명철2, |
Do Won Hwang, B.S.1,2, Dong Soo Lee, M.D.,Ph.D.1,2, Joo Hyun Kang, Ph.D.2, Young Soo Chang, M.S.2,Yun Hui Kim, B.S.1,2, Jae Min Jeong, Ph.D.2, June-Key Chung, M.D.,Ph.D.2, Myung Chul Lee, M.D.,Ph.D.2 |
Affiliation |
서울대학교 뇌과학 협동과정,1 서울대학교 의과대학 핵의학교실2 Program in Neuroscience,1 Seoul National University and Department of Nuclear Medicine,2 Seoul National University College of Medicine, Seoul, Korea |
Abstract |
Purpose: Both human NIS and mutant D2R transgenes are proposed as reporting system in transplanted cell
tracking. Using hepatoma cell lines, we constructed a dual reporter system containing human sodium-iodide
symporter (hNIS) and dopamine 2 receptor (D2R) and compared its characteristics. Materials and Methods: The
recombinant plasmid (pIRES-hNIS/D2R) was constructed with IRES (internal ribosome entry site) under control of the
CMV promoter. pIRES-hNIS/D2R was transfected to human hepatoma SK-Hep1 cell line with lipofectamine. HEP-ND
(SK-Hep1-hNIS/D2R) cells stably expressing hNIS and D2R was established by selection with G418 for two weeks.
RT-PCR was performed to investigate the expression of both hNIS and D2R genes. The expressions of hNIS and
D2R were measured by 125I uptake assays and receptor binding assays. Specific binding of D2R to [3H]spiperone was
verified by Scatchard plot with (+) butaclamol as a specific inhibitor. Kd and Bmax values were estimated. The
correlation between hNIS and D2R expression was compared by using each clone. Results: Similar quantities of
hNIS and D2R genes were expressed on HEP-ND as RT-PCR assays. HEP-ND cells showed 30 to 40 fold higher
radioiodine uptakes than those of parental SK-Hep1 cells. 125I uptake in HEP-ND cells was completely inhibited by
KClO4, a NIS inhibitor. Specific binding to HEP-ND cells was saturable and the Kd and Bmax values for HEP-ND cells
were 2.92 nM, 745.25 fmol/mg protein and 2.91nM, 1323 fmole/mg protein in two clones, respectively. The
radioiodine uptake by hNIS activity and D2R binding was highly correlated. Conclusion: We developed a dual
positron and gamma imaging reporter system of hNIS and D2R in a stably transfected cell line. We expect that
D2R and hNIS genes can complement mutually as a nuclear reporting system or that D2R can be used as
reporter gene when hNIS gene were used as a treatment gene. (Korean J Nucl Med 38(4):294-299, 2004) |
Keyword |
dopamine 2 receptor, human sodium iodide symporter, SK-Hep1 cell line |
Full text Article |
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