Previous studies showed that gammaIFN decreases metastatic hepatic tumor growth by stimulating Kupffer cells (KC). The present studies examine whether lymphocyte stimulation via cells engineered to secrete GM-CSF or IL-2 decreases hepatic tumor growth, and whether stimulation of both macrophages and lymphocytes is more effective than either individually. Rats were immunized with irradiated hepatoma cells transduced by herpes viral amplicon vectors containing the genes for GM-CSF, IL-2 or LacZ. On day 18, half of each group was treated with 5 x 10(4) U gammaIFN, or saline intraperitoneally for 3 d. On day 21, all rats received 5 x 10(5) hepatoma cells intrasplenically. On day 41, rats were killed and tumor nodules were counted. Separate rats underwent splenocyte and KC harvest for assessment of lymphocyte- and macrophage-mediated tumor cell kill in vitro. GM-CSF or IL-2 vaccines or gammaIFN decreased tumor nodules significantly (GM-CSF 13+/-4, IL-2 14+/-6 vs. control 75+/-24, P < 0.001). Combination therapy was more effective, and completely eliminated tumor in 4 of 12 IFN-GM-CSF and 8 of 11 IFN-IL-2 animals. Additional rats underwent partial hepatectomy, an immunosuppressive procedure known to accelerate the growth of hepatic tumor, following tumor challenge. Therapy was equally effective in this immunosuppressive setting. Vaccination is associated with enhancement of splenocyte-mediated tumoricidal activity, whereas the effect of gammaIFN is mediated by KC. GM-CSF and IL-2 vaccine therapy and pretreatment with gammaIFN represent effective strategies in reducing hepatic tumor. Combination therapy targets both lymphocytes and macrophages, and is more effective in reducing tumor than either therapy alone.
H M Karpoff, M D'Angelica, S Blair, M D Brownlee, H Federoff, Y Fong
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FH van Duijnhoven, RI Aalbers, J Rothbarth, OT Terpstra, PJ Kuppen |
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Use of radiolabelled iododeoxyuridine as adjuvant treatment for experimental tumours of the liver
JS Zager, KA Delman, MI Ebright, S Malhotra, S Larson, Y Fong |
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KA Delman, JS Zager, JJ Bennett, S Malhotra, MI Ebright, PF McAuliffe, MW Halterman, HJ Federoff, Y Fong |
Annals of Surgery | 2002 |
Efficacy of Multiagent Herpes Simplex Virus Amplicon-Mediated Immunotherapy as Adjuvant Treatment for Experimental Hepatic Cancer
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Annals of Surgery | 2002 |
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Annals of Surgery | 2001 |
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ME Wilcox, W Yang, D Senger, NB Rewcastle, DG Morris, PM Brasher, ZQ Shi, RN Johnston, S Nishikawa, PW Lee, PA Forsyth |
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Dendritic Cells Transduced with HSV-1 Amplicons Expressing Prostate-Specific Antigen Generate Antitumor Immunity in Mice
RA Willis, WJ Bowers, MJ Turner, TL Fisher, CS Abdul-Alim, DF Howard, HJ Federoff, EM Lord, JG Frelinger |
Human Gene Therapy | 2001 |
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AD Brooks, B Ng, D Liu, M Brownlee, M Burt, HJ Federoff, Y Fong |
Surgery | 2001 |
Combination suicide/cytokine gene therapy as adjuvants to a defective herpes simplex virus-based cancer vaccine
M Toda, RL Martuza, SD Rabkin |
Gene Therapy | 2001 |
A Novel Approach to Cancer Therapy Using an Oncolytic Herpes Virus to Package Amplicons Containing Cytokine Genes
JF Carew, DA Kooby, MW Halterman, SH Kim, HJ Federoff, Y Fong |
Molecular Therapy | 2001 |
Combination Vascular Delivery of Herpes Simplex Oncolytic Viruses and Amplicon Mediated Cytokine Gene Transfer Is Effective Therapy for Experimental Liver Cancer
JS Zager, KA Delman, S Malhotra, MI Ebright, JJ Bennett, T Kates, M Halterman, H Federoff, Y Fong |
Molecular Medicine | 2001 |
Positron emission tomography imaging for herpes virus infection: Implications for oncolytic viral treatments of cancer
JJ Bennett, J Tjuvajev, P Johnson, M Doubrovin, T Akhurst, S Malholtra, T Hackman, J Balatoni, R Finn, SM Larson, H Federoff, R Blasberg, Y Fong |
Nature Medicine | 2001 |
Neoadjuvant interleukin-12 immunogene therapy protects against cancer recurrence after liver resection in an animal model
WR Jarnagin, K Delman, D Kooby, S Mastorides, J Zager, MF Brennan, LH Blumgart, H Federoff, Y Fong |
Annals of Surgery | 2000 |
Regional muramyl tripeptide phosphatidylethanolamine administration enhances hepatic immune function and tumor surveillance
HM Karpoff, W Jarnagin, K Delman, Y Fong |
Surgery | 2000 |
Neoadjuvant Interleukin-12 Immunogene Therapy Protects Against Cancer Recurrence After Liver Resection in an Animal Model
WR Jarnagin, K Delman, D Kooby, S Mastorides, J Zager, MF Brennan, LH Blumgart, H Federoff, Y Fong |
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Journal of Hepatology | 2000 |
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HPB : the official journal of the International Hepato Pancreato Biliary Association | 2000 |
Clinical score for predicting recurrence after hepatic resection for metastatic colorectal cancer: analysis of 1001 consecutive cases
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Annals of Surgery | 1999 |
Clinical Score for Predicting Recurrence After Hepatic Resection for Metastatic Colorectal Cancer
Y Fong, J Fortner, RL Sun, MF Brennan, LH Blumgart |
Annals of Surgery | 1999 |
Herpes Simplex Virus (HSV)-Mediated ICAM-1 Gene Transfer Abrogates Tumorigenicity and Induces Anti-Tumor Immunity
M DAngelica, C Tung, P Allen, M Halterman, K Delman, T Delohery, D Klimstra, M Brownlee, H Federoff, Y Fong |
Molecular Medicine | 1999 |
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DA Kooby, JF Carew, MW Halterman, JE Mack, JR Bertino, LH Blumgart, HJ Federoff, Y Fong |
The FASEB Journal | 1999 |
Eradication of Pre-Established Lymphoma Using Herpes Simplex Virus Amplicon Vectors
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Blood | 1999 |
Pretreatment with IFN-γ Decreases Infectious Complications After Partial Hepatectomy in the Rat
SL Blair, HM Karpoff, C Hodyl, Y Fong |
Journal of Interferon & Cytokine Research | 1998 |
Experimental vaccine strategies for cancer immunotherapy
CH Chen, TC Wu |
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Cytokine Gene Therapy for Human Tumors
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Surgical oncology clinics of North America | 1998 |