Abstract
Purpose
Since their discovery in 2006, induced pluripotent stem cells (iPSCs) have gained increasing interest for tissue regeneration and transplantation therapies. However, teratoma formation after iPSC transplantation is one of the most serious drawbacks that may limit their further clinical application. We investigated here whether human iPSC-derived teratomas could be detected by an integrin-targeting agent 99mTc-PEG4-E[PEG4-c(RGDfK)]2 (99mTc-3PRGD2).
Methods
Human-induced pluripotent stem cells (hiPSCs) were generated and characterized. In vitro integrin αvβ3 expression levels of hiPSC- and hiPSC-derived teratoma cells were determined by flow cytometry. 99mTc-3PRGD2 was prepared, and planar gamma imaging and biodistribution studies were carried out in teratoma-bearing severe combined immunodeficient (SCID) mice. Positron emission tomography (PET) imaging of teratomas with 2-deoxy-2-[18F]fluoro-d-glucose (18F-FDG) was also performed for comparison. Integrin αvβ3 expression in teratoma tissues was determined by immunofluorescence staining.
Results
99mTc-3PRGD2 showed high (2.82 ± 0.21 and 2.69 ± 0.73%ID/g at 0.5 and 1 h pi, respectively) and specific (teratoma uptake decreased from 2.69 ± 0.73 to 0.53 ± 0.26%ID/g after blocking with cold 3PRGD2) uptake in teratoma tissues, and planar gamma imaging demonstrated the feasibility of noninvasively detecting the teratoma formation with 99mTc-3PRGD2. 18F-FDG showed low teratoma uptake and thus failed to detect the teratomas. Ex vivo immunofluorescence staining validated the integrin αvβ3 expression in the vasculature during teratoma formation.
Conclusion
Gamma imaging with 99mTc-3PRGD2 is a promising approach for the noninvasive monitoring of tumorigenicity after hiPSCs transplantation.
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References
Klimanskaya I, Rosenthal N, Lanza R (2008) Derive and conquer: sourcing and differentiating stem cells for therapeutic applications. Nat Rev Drug Discov 7:131–142
Swijnenburg RJ, Schrepfer S, Govaert JA, Cao F, Ransohoff K, Sheikh AY, Haddad M, Connolly AJ, Davis MM, Robbins RC et al (2008) Immunosuppressive therapy mitigates immunological rejection of human embryonic stem cell xenografts. Proc Natl Acad Sci USA 105:12991–12996
Fong CY, Gauthaman K, Bongso A (2010) Teratomas from pluripotent stem cells: a clinical hurdle. J Cell Biochem 111:769–781
Takahashi K, Yamanaka S (2006) Induction of pluripotent stem cells from mouse embryonic and adult fibroblast cultures by defined factors. Cell 126:663–676
Takahashi K, Tanabe K, Ohnuki M, Narita M, Ichisaka T, Tomoda K, Yamanaka S (2007) Induction of pluripotent stem cells from adult human fibroblasts by defined factors. Cell 131:861–872
Yu J, Vodyanik MA, Smuga-Otto K, Antosiewicz-Bourget J, Frane JL, Tian S, Nie J, Jonsdottir GA, Ruotti V, Stewart R et al (2007) Induced pluripotent stem cell lines derived from human somatic cells. Science 318:1917–1920
Hussein SM, Nagy K, Nagy A (2011) Human induced pluripotent stem cells: the past, present, and future. Clin Pharmacol Ther 89:741–745
Folkman J (1995) Angiogenesis in cancer, vascular, rheumatoid and other disease. Nat Med 1:27–31
Yan X (2010) Angiogenesis: a promising strategy for tumor therapy. Acta Biophys Sin 26:180–193
Cai W, Niu G, Chen X (2008) Imaging of integrins as biomarkers for tumor angiogenesis. Curr Pharm Des 14:2943–2973
Liu Z, Wang F, Chen X (2008) Integrin alpha(v)beta(3)-targeted cancer therapy. Drug Dev Res 69:329–339
He Q, Liu Z, Jia B, Li X, Shi J, Zhang J, Lan F, Yang Z, Liu Y, Shen L et al (2008) In vivo gamma imaging of the secondary tumors of transplanted human fetal striatum neural stem cells-derived primary tumor cells. Neuroreport 19:1009–1014
Liu S (2009) Radiolabeled cyclic RGD peptides as integrin alpha(v)beta(3)-targeted radiotracers: maximizing binding affinity via bivalency. Bioconjug Chem 20:2199–2213
Jia B, Liu Z, Zhu Z, Shi J, Jin X, Zhao H, Li F, Liu S, Wang F (2011) Blood clearance kinetics, biodistribution, and radiation dosimetry of a kit-formulated integrin alphavbeta3-selective radiotracer 99mTc-3PRGD2 in non-human primates. Mol Imaging Biol 13:730–736
Ma Q, Ji B, Jia B, Gao S, Ji T, Wang X, Han Z, Zhao G (2011) Differential diagnosis of solitary pulmonary nodules using 99mTc-3P4-RGD2 scintigraphy. Eur J Nucl Med Mol Imaging 38:2145–2152
Liu Z, Jia B, Shi J, Jin X, Zhao H, Li F, Liu S, Wang F (2010) Tumor uptake of the RGD dimeric probe 99mTc-G3-2P4-RGD2 is correlated with integrin alphavbeta3 expressed on both tumor cells and neovasculature. Bioconjug Chem 21:548–555
Liu Z, Jia B, Zhao H, Chen X, Wang F (2011) Specific targeting of human integrin alphavbeta3 with 111In-labeled Abegrin in nude mouse models. Mol Imaging Biol 13:112–120
Yoshida Y, Yamanaka S (2010) Recent stem cell advances: induced pluripotent stem cells for disease modeling and stem cell-based regeneration. Circulation 122:80–87
Cai W, Zhang Y, Kamp T (2011) Imaging of induced pluripotent stem cells: from cellular reprogramming to transplantation. Am J Nucl Med Mol Imaging 1:18–28
Kraitchman DL, Heldman AW, Atalar E, Amado LC, Martin BJ, Pittenger MF, Hare JM, Bulte JW (2003) In vivo magnetic resonance imaging of mesenchymal stem cells in myocardial infarction. Circulation 107:2290–2293
Cao F, Lin S, Xie X, Ray P, Patel M, Zhang X, Drukker M, Dylla S, Connolly AJ, Chen X et al (2006) In vivo visualization of embryonic stem cell survival, proliferation, and migration after cardiac delivery. Circulation 113:1005–1014
Rohren EM, Turkington TG, Coleman RE (2004) Clinical applications of PET in oncology. Radiology 231:305–332
Sugawara Y, Zasadny KR, Grossman HB, Francis IR, Clarke MF, Wahl RL (1999) Germ cell tumor: differentiation of viable tumor, mature teratoma, and necrotic tissue with FDG PET and kinetic modeling. Radiology 211:249–256
Kollmannsberger C, Oechsle K, Dohmen BM, Pfannenberg A, Bares R, Claussen CD, Kanz L, Bokemeyer C (2002) Prospective comparison of [18F]fluorodeoxyglucose positron emission tomography with conventional assessment by computed tomography scans and serum tumor markers for the evaluation of residual masses in patients with nonseminomatous germ cell carcinoma. Cancer 94:2353–2362
Johns Putra L, Lawrentschuk N, Ballok Z, Hannah A, Poon A, Tauro A, Davis ID, Hicks RJ, Bolton DM, Scott AM (2004) 18F-Fluorodeoxyglucose positron emission tomography in evaluation of germ cell tumor after chemotherapy. Urology 64:1202–1207
Aide N, Briand M, Bohn P, Dutoit S, Lasnon C, Chasle J, Rouvet J, Modzelewski R, Vela A, Deslandes E et al (2011) Alphavbeta3 imaging can accurately distinguish between mature teratoma and necrosis in 18F-FDG-negative residual masses after treatment of non-seminomatous testicular cancer: a preclinical study. Eur J Nucl Med Mol Imaging 38:323–333
Cao F, Li Z, Lee A, Liu Z, Chen K, Wang H, Cai W, Chen X, Wu JC (2009) Noninvasive de novo imaging of human embryonic stem cell-derived teratoma formation. Cancer Res 69:2709–2713
Acknowledgments
This work was financially supported, in part, by the National Natural Science Foundation of China (NSFC) projects (30930030, 81000625, 31000653, 30870728, 30900373, and 81028009), the Outstanding Youth Fund (81125011), a Beijing Natural Science Foundation project (5112019), a “973” project (2011CB707703), an Innovation Team Project of the Ministry of Education (No. BMU20110263), and grants from the Ministry of Science and Technology of China (2011YQ030114 and 2012ZX09102301-018).
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Li, Y., Liu, Z., Dong, C. et al. Noninvasive Detection of Human-Induced Pluripotent Stem Cell (hiPSC)-Derived Teratoma with an Integrin-Targeting Agent 99mTc-3PRGD2. Mol Imaging Biol 15, 58–67 (2013). https://doi.org/10.1007/s11307-012-0571-1
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DOI: https://doi.org/10.1007/s11307-012-0571-1