title: TWEAK mediates anti-tumor effect of tumor-infiltrating macrophage.
abstract: TWEAK induces diverse cellular responses, including pro-inflammatory chemokine production, migration, proliferation, and cell death through the TWEAK receptor, Fn14. In the present study, we examined the effect of TWEAK or Fn14 expression in tumor cells on tumor outgrowth in vivo. Administration of neutralizing anti-TWEAK mAb significantly reduced the frequency of tumor rejection and shortened the survival of mice intraperitoneally inoculated with TWEAK-sensitive Fn14-expressing tumor cells. Moreover, anti-TWEAK mAb treatment promoted the subcutaneous growth of TWEAK-sensitive Fn14-expressing tumor cells, and this promotion was abolished by the inhibition of macrophage infiltration but not NK cell depletion. In contrast, administration of anti-TWEAK mAb had no apparent effect on the growth of TWEAK-resistant tumor cells, even if tumor cells expressed Fn14. On the other hand, TWEAK expression in tumor cells had no significant effect on subcutaneous tumor growth. These results indicate that TWEAK mediates anti-tumor effect of macrophages in vivo.
authors.affiliation: Department of Immunology, Juntendo University School of Medicine, Tokyo 113-8421, Japan. ktakeda@med.juntendo.ac.jp
authors.forename: Yuki
authors.initials: Y
authors.lastname: Kaduka
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Takeda
authors.forename: Masafumi
authors.initials: M
authors.lastname: Nakayama
authors.forename: Katsuyuki
authors.initials: K
authors.lastname: Kinoshita
authors.forename: Hideo
authors.initials: H
authors.lastname: Yagita
authors.forename: Ko
authors.initials: K
authors.lastname: Okumura
mesh_terms: D000818:Animals; D051017:Apoptosis Regulatory Proteins; D002352:Carrier Proteins / Q000235:genetics / Q000378:metabolism*; D002455:Cell Division; D045744:Cell Line, Tumor; D000074049:Cytokine TWEAK; D003602:Cytotoxicity, Immunologic; D008264:Macrophages / Q000166:cytology / Q000276:immunology*; D051379:Mice; D009368:Neoplasm Transplantation; D009369:Neoplasms / Q000235:genetics / Q000276:immunology* / Q000378:metabolism* / Q000473:pathology; D018124:Receptors, Tumor Necrosis Factor / Q000235:genetics / Q000378:metabolism; D040521:Subcutaneous Tissue / Q000473:pathology; D000074050:TWEAK Receptor; D048069:Tumor Necrosis Factors
chemical_list: D051017:Apoptosis Regulatory Proteins; D002352:Carrier Proteins; D000074049:Cytokine TWEAK; D018124:Receptors, Tumor Necrosis Factor; D000074050:TWEAK Receptor; C000613299:Tnfrsf12a protein, mouse; C491645:Tnfsf12 protein, mouse; D048069:Tumor Necrosis Factors