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Deprecated: Implicit conversion from float 245.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Nat+Commun 2015 ; 6 (ä): 6536 Nephropedia Template TP
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Immunotoxin targeting glypican-3 regresses liver cancer via dual inhibition of Wnt signaling and protein synthesis #MMPMID25758784
Gao W; Tang Z; Zhang Y; Feng M; Qian M; Dimitrov DS; Ho M
Nat Commun 2015[]; 6 (ä): 6536 PMID25758784show ga
Glypican-3 is a cell surface glycoprotein that associates with Wnt in liver cancer. We develop two antibodies targeting glypican-3, HN3 and YP7. The first antibody recognizes a functional epitope and inhibits Wnt signaling, whereas the second antibody recognizes a C-terminal epitope but does not inhibit Wnt signaling. Both are fused to a fragment of Pseudomonas exotoxin A (PE38) to create immunotoxins. Interestingly, the immunotoxin based on HN3 (HN3-PE38) has superior anti-tumor activity as compared to YP7 (YP7-PE38) both in vitro and in vivo. Intravenous administration of HN3-PE38 alone, or in combination with chemotherapy, induces regression of Hep3B and HepG2 liver tumor xenografts in mice. This study establishes glypican-3 as a promising candidate for immunotoxin-based liver cancer therapy. Our results demonstrate immunotoxin-induced tumor regression via dual mechanisms: inactivation of cancer signaling via the antibody and inhibition of protein synthesis via the toxin.