TY - JOUR
T1 - Radioimmunotherapy targeting the extra domain B of fibronectin in C6 rat gliomas: a preliminary study about the therapeutic efficacy of iodine-131-labeled SIP(L19)
AU - Spaeth, Nicolas
AU - Wyss, Matthias T.
AU - Pahnke, Jens
AU - Biollaz, Gregoire
AU - Trachsel, Eveline
AU - Drandarov, Konstantin
AU - Treyer, Valerie
AU - Weber, Bruno
AU - Neri, Dario
AU - Buck, Alfred
N1 - Funding Information:
This study was supported by Wilhelm-Sander-Stiftung (Zurich, Switzerland). The authors thank Gustav K. von Schulthess and Gerrit Westera for valuable discussions.
PY - 2006/7
Y1 - 2006/7
N2 - Despite aggressive treatment protocols, patients suffering from glioblastoma multiforme still experience poor outcome. Therefore, new adjuvant therapeutic options such as radioimmunotherapy (RIT) have been studied and have resulted in significant survival benefit. In this study, we assessed the efficacy of a novel radioimmunotherapeutic approach targeting the extra domain B (EDB) of fibronectin, a marker of angiogenesis, in glioma-bearing rats. Methods: C6 gliomas were induced intracerebrally in Wistar rats. Ten to 11 days later, 220-360 MBq of iodine-131-labeled anti-EDB SIP(L19) ("small immunoprotein") was administered intravenously into nine animals, yielding a radiation dose of 13-21 Gy. Another nine rats served as controls. Then the following parameters were compared: median survival time, tumor size and histology. Results: Histological examination of the tumors revealed typical glioblastoma characteristics. Eleven of 18 rats developed a tumor size bigger than 150 mm3. When these animals were used for survival analysis, median survival did significantly differ between groups [22 days (therapy; n=7) vs. 16 days (control; n=4); P<.0176]. Conclusions: In this preliminary trial, 131I-SIP(L19)-RIT showed promising potential in treating C6 gliomas, warranting further studies. However, larger trials with preferentially higher doses are needed to confirm this finding and, potentially, to further increase the efficacy of this treatment.
AB - Despite aggressive treatment protocols, patients suffering from glioblastoma multiforme still experience poor outcome. Therefore, new adjuvant therapeutic options such as radioimmunotherapy (RIT) have been studied and have resulted in significant survival benefit. In this study, we assessed the efficacy of a novel radioimmunotherapeutic approach targeting the extra domain B (EDB) of fibronectin, a marker of angiogenesis, in glioma-bearing rats. Methods: C6 gliomas were induced intracerebrally in Wistar rats. Ten to 11 days later, 220-360 MBq of iodine-131-labeled anti-EDB SIP(L19) ("small immunoprotein") was administered intravenously into nine animals, yielding a radiation dose of 13-21 Gy. Another nine rats served as controls. Then the following parameters were compared: median survival time, tumor size and histology. Results: Histological examination of the tumors revealed typical glioblastoma characteristics. Eleven of 18 rats developed a tumor size bigger than 150 mm3. When these animals were used for survival analysis, median survival did significantly differ between groups [22 days (therapy; n=7) vs. 16 days (control; n=4); P<.0176]. Conclusions: In this preliminary trial, 131I-SIP(L19)-RIT showed promising potential in treating C6 gliomas, warranting further studies. However, larger trials with preferentially higher doses are needed to confirm this finding and, potentially, to further increase the efficacy of this treatment.
UR - http://www.scopus.com/inward/record.url?scp=33745933054&partnerID=8YFLogxK
U2 - 10.1016/j.nucmedbio.2006.05.001
DO - 10.1016/j.nucmedbio.2006.05.001
M3 - Journal articles
C2 - 16843841
AN - SCOPUS:33745933054
SN - 0969-8051
VL - 33
SP - 661
EP - 666
JO - Nuclear Medicine and Biology
JF - Nuclear Medicine and Biology
IS - 5
ER -
