Apo2 ligand/tumor necrosis factor-related apoptosis-inducing ligand cooperates with chemotherapy to inhibit orthotopic lung tumor growth and improve survival.
Apo2 ligand/tumor necrosis factor-related apoptosis-inducing ligand (Apo2L/TRAIL) is a tumor necrosis factor superfamily member that induces apoptosis through the death receptors DR4 and/or DR5 in various cancer cell types but not in most normal cells. Several lung cancer cell lines express DR4 and DR5 and undergo apoptosis in vitro in response to Apo2L/TRAIL. We investigated the efficacy of recombinant soluble human Apo2L/TRAIL and its interaction with chemotherapy in xenograft models based on human NCI-H460 non-small cell lung carcinoma cells. In vitro, Taxol enhanced caspase activation and apoptosis induction by Apo2L/TRAIL. In vivo, Apo2L/TRAIL or Taxol plus carboplatin chemotherapy partially delayed progression of established subcutaneous tumor xenografts, whereas combined treatment caused tumor regression and a substantially longer growth delay. Apo2L/TRAIL, chemotherapy, or the combination of both inhibited growth of preformed orthotopic lung parenchymal tumors versus control by 60%, 57%, or 97%, respectively (all P < 0.01; n = 8-10). Furthermore, combination treatment improved day-90 survival relative to control (7 of 15 versus 1 of 15; P = 0.0003 by Mantel-Cox) as well as to Apo2L/TRAIL (3 of 14; P = 0.031) or chemotherapy (3 of 15; P = 0.035). These studies provide evidence for in vivo activity of Apo2L/TRAIL against lung tumor xenografts and underscore the potential of this ligand for advancing current lung cancer treatment strategies.
Jin
Hongkui
H
Department of Molecular Oncology, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA.
Yang
Renhui
R
Fong
Sharon
S
Totpal
Klara
K
Lawrence
David
D
Zheng
Zhong
Z
Ross
Jed
J
Koeppen
Hartmut
H
Schwall
Ralph
R
Ashkenazi
Avi
A
D000818:Animals; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000494:pharmacology*; D051017:Apoptosis Regulatory Proteins; D002289:Carcinoma, Non-Small-Cell Lung / Q000188:drug therapy* / Q000473:pathology; D002455:Cell Division / Q000187:drug effects; D045744:Cell Line, Tumor; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000188:drug therapy* / Q000473:pathology; D008562:Membrane Glycoproteins / Q000008:administration & dosage / Q000494:pharmacology*; D051379:Mice; D008819:Mice, Nude; D011994:Recombinant Proteins / Q000494:pharmacology; D053221:TNF-Related Apoptosis-Inducing Ligand; D014409:Tumor Necrosis Factor-alpha / Q000008:administration & dosage / Q000494:pharmacology*; D023041:Xenograft Model Antitumor Assays
D051017:Apoptosis Regulatory Proteins; D008562:Membrane Glycoproteins; D011994:Recombinant Proteins; D053221:TNF-Related Apoptosis-Inducing Ligand; C505653:TNFSF10 protein, human; C505654:Tnfsf10 protein, mouse; D014409:Tumor Necrosis Factor-alpha