PURPOSE: We assessed whether imaging α(v)β(3) integrin could distinguish mature teratoma from necrosis in human non-seminomatous germ cell tumour (NSGCT) post-chemotherapy residual masses. METHODS: Human embryonal carcinoma xenografts (six/rat) were untreated (controls) or treated to form mature teratomas with low-dose cisplatin and all-trans retinoic acid (ATRA) over a period of 8 weeks. In another group, necrosis was induced in xenografts with high-dose cisplatin plus etoposide (two cycles). (18)F-Fluorodeoxyglucose ((18)F-FDG) small animal positron emission tomography (SA PET) imaging was performed in three rats (one control and two treated for 4 and 8 weeks with cisplatin+ATRA). Imaging of α(v)β(3) expression was performed in six rats bearing mature teratomas and two rats with necrotic lesions on a microSPECT/CT device after injection of the tracer [(99m)Tc]HYNIC-RGD [6-hydrazinonicotinic acid conjugated to cyclo(Arg-Gly-Asp-D-Phe-Lys)]. Correlative immunohistochemistry studies of human and mouse α(v)β(3) expression were performed. RESULTS: Cisplatin+ATRA induced differentiation of the xenografts. After 8 weeks, some glandular structures and mesenchymal cells were visible; in contrast, control tumours showed undifferentiated tissues. SA PET imaging showed that mature teratoma had very low avidity for (18)F-FDG [mean standardised uptake value (SUV(mean)) = 0.48 ± 0.05] compared to untreated embryonal carcinoma (SUV(mean) = 0.92 ± 0.13) (p = 0.005). α(v)β(3) imaging accurately distinguished mature teratoma (tumour to muscle ratio = 4.29 ± 1.57) from necrosis (tumour to muscle ratio = 1.3 ± 0.26) (p = 0.0002). Immunohistochemistry studies showed that α(v)β(3) integrin expression was strong in the glandular structures of mature teratoma lesions and negative in host stroma. CONCLUSION: Imaging α(v)β(3) integrin accurately distinguished mature teratoma from necrosis following cisplatin-based treatment in human NSGCT xenografts.
PURPOSE: We assessed whether imaging α(v)β(3) integrin could distinguish mature teratoma from necrosis in human non-seminomatous germ cell tumour (NSGCT) post-chemotherapy residual masses. METHODS:Humanembryonal carcinoma xenografts (six/rat) were untreated (controls) or treated to form mature teratomas with low-dose cisplatin and all-trans retinoic acid (ATRA) over a period of 8 weeks. In another group, necrosis was induced in xenografts with high-dose cisplatin plus etoposide (two cycles). (18)F-Fluorodeoxyglucose ((18)F-FDG) small animal positron emission tomography (SA PET) imaging was performed in three rats (one control and two treated for 4 and 8 weeks with cisplatin+ATRA). Imaging of α(v)β(3) expression was performed in six rats bearing mature teratomas and two rats with necrotic lesions on a microSPECT/CT device after injection of the tracer [(99m)Tc]HYNIC-RGD [6-hydrazinonicotinic acid conjugated to cyclo(Arg-Gly-Asp-D-Phe-Lys)]. Correlative immunohistochemistry studies of human and mouse α(v)β(3) expression were performed. RESULTS:Cisplatin+ATRA induced differentiation of the xenografts. After 8 weeks, some glandular structures and mesenchymal cells were visible; in contrast, control tumours showed undifferentiated tissues. SA PET imaging showed that mature teratoma had very low avidity for (18)F-FDG [mean standardised uptake value (SUV(mean)) = 0.48 ± 0.05] compared to untreated embryonal carcinoma (SUV(mean) = 0.92 ± 0.13) (p = 0.005). α(v)β(3) imaging accurately distinguished mature teratoma (tumour to muscle ratio = 4.29 ± 1.57) from necrosis (tumour to muscle ratio = 1.3 ± 0.26) (p = 0.0002). Immunohistochemistry studies showed that α(v)β(3) integrin expression was strong in the glandular structures of mature teratoma lesions and negative in host stroma. CONCLUSION: Imaging α(v)β(3) integrin accurately distinguished mature teratoma from necrosis following cisplatin-based treatment in human NSGCT xenografts.
Authors: Marcel Janssen; Wim J G Oyen; Leon F A G Massuger; Cathelijne Frielink; Ingrid Dijkgraaf; D Scott Edwards; Milind Radjopadhye; Frans H M Corstens; Otto C Boerman Journal: Cancer Biother Radiopharm Date: 2002-12 Impact factor: 3.099
Authors: Susanne Krege; Jörg Beyer; Rainer Souchon; Peter Albers; Walter Albrecht; Ferran Algaba; Michael Bamberg; István Bodrogi; Carsten Bokemeyer; Eva Cavallin-Ståhl; Johannes Classen; Christoph Clemm; Gabriella Cohn-Cedermark; Stéphane Culine; Gedske Daugaard; Pieter H M De Mulder; Maria De Santis; Maike de Wit; Ronald de Wit; Hans Günter Derigs; Klaus-Peter Dieckmann; Annette Dieing; Jean-Pierre Droz; Martin Fenner; Karim Fizazi; Aude Flechon; Sophie D Fosså; Xavier Garcia del Muro; Thomas Gauler; Lajos Geczi; Arthur Gerl; Jose Ramon Germa-Lluch; Silke Gillessen; Jörg T Hartmann; Michael Hartmann; Axel Heidenreich; Wolfgang Hoeltl; Alan Horwich; Robert Huddart; Michael Jewett; Johnathan Joffe; William G Jones; László Kisbenedek; Olbjørn Klepp; Sabine Kliesch; Kai Uwe Koehrmann; Christian Kollmannsberger; Markus Kuczyk; Pilar Laguna; Oscar Leiva Galvis; Volker Loy; Malcolm D Mason; Graham M Mead; Rolf Mueller; Craig Nichols; Nicola Nicolai; Tim Oliver; Dalibor Ondrus; Gosse O N Oosterhof; Luis Paz-Ares; Giorgio Pizzocaro; Jörg Pont; Tobias Pottek; Tom Powles; Oliver Rick; Giovanni Rosti; Roberto Salvioni; Jutta Scheiderbauer; Hans-Ulrich Schmelz; Heinz Schmidberger; Hans-Joachim Schmoll; Mark Schrader; Felix Sedlmayer; Niels E Skakkebaek; Aslam Sohaib; Sergei Tjulandin; Padraig Warde; Stefan Weinknecht; Lothar Weissbach; Christian Wittekind; Eva Winter; Lori Wood; Hans von der Maase Journal: Eur Urol Date: 2007-12-26 Impact factor: 20.096
Authors: Susanne Krege; Jörg Beyer; Rainer Souchon; Peter Albers; Walter Albrecht; Ferran Algaba; Michael Bamberg; István Bodrogi; Carsten Bokemeyer; Eva Cavallin-Ståhl; Johannes Classen; Christoph Clemm; Gabriella Cohn-Cedermark; Stéphane Culine; Gedske Daugaard; Pieter H M De Mulder; Maria De Santis; Maike de Wit; Ronald de Wit; Hans Günter Derigs; Klaus-Peter Dieckmann; Annette Dieing; Jean-Pierre Droz; Martin Fenner; Karim Fizazi; Aude Flechon; Sophie D Fosså; Xavier Garcia del Muro; Thomas Gauler; Lajos Geczi; Arthur Gerl; Jose Ramon Germa-Lluch; Silke Gillessen; Jörg T Hartmann; Michael Hartmann; Axel Heidenreich; Wolfgang Hoeltl; Alan Horwich; Robert Huddart; Michael Jewett; Johnathan Joffe; William G Jones; László Kisbenedek; Olbjørn Klepp; Sabine Kliesch; Kai Uwe Koehrmann; Christian Kollmannsberger; Markus Kuczyk; Pilar Laguna; Oscar Leiva Galvis; Volker Loy; Malcolm D Mason; Graham M Mead; Rolf Mueller; Craig Nichols; Nicola Nicolai; Tim Oliver; Dalibor Ondrus; Gosse O N Oosterhof; Luis Paz Ares; Giorgio Pizzocaro; Jörg Pont; Tobias Pottek; Tom Powles; Oliver Rick; Giovanni Rosti; Roberto Salvioni; Jutta Scheiderbauer; Hans-Ulrich Schmelz; Heinz Schmidberger; Hans-Joachim Schmoll; Mark Schrader; Felix Sedlmayer; Niels E Skakkebaek; Aslam Sohaib; Sergei Tjulandin; Padraig Warde; Stefan Weinknecht; Lothar Weissbach; Christian Wittekind; Eva Winter; Lori Wood; Hans von der Maase Journal: Eur Urol Date: 2007-12-26 Impact factor: 20.096
Authors: György Trencsényi; Teréz Márián; Imre Lajtos; Zoltán Krasznai; László Balkay; Miklós Emri; Pál Mikecz; Katalin Goda; Gábor Szalóki; István Juhász; Enikő Németh; Tünde Miklovicz; Gábor Szabó; Zoárd T Krasznai Journal: Biomed Res Int Date: 2014-09-18 Impact factor: 3.411