PMID- 22158049 OWN - NLM STAT- MEDLINE DCOM- 20121120 LR - 20211021 IS - 1476-5594 (Electronic) IS - 0950-9232 (Print) IS - 0950-9232 (Linking) VI - 31 IP - 37 DP - 2012 Sep 13 TI - Breaking the 'harmony' of TNF-alpha signaling for cancer treatment. PG - 4117-27 LID - 10.1038/onc.2011.567 [doi] AB - Tumor necrosis factor-alpha (TNF-alpha) binds to two distinct receptors, TNFR1/p55 and TNFR2/p75. TNF-alpha is implicated in the processes of tumor growth, survival, differentiation, invasion, metastases, secretion of cytokines and pro-angiogenic factors. We have shown that TNFR2/p75 signaling promotes ischemia-induced angiogenesis via modulation of several angiogenic growth factors. We hypothesized that TNFR2/p75 may promote tumor growth and angiogenesis. Growth of mouse Lewis lung carcinoma (LLC1) and/or mouse melanoma B16 cell was evaluated in wild type (WT), p75 knockout (KO) and double p55KO/p75KO mouse tumor xenograft models. Compared with WT and p55KO/p75KO mice, growth of tumors in p75KO mice was significantly decreased (twofold) in both LLC and B16 tumors. Tumor growth inhibition was correlated with decreases in vascular endothelial growth factor (VEGF) expression and capillary density, as well as bone marrow-derived endothelial progenitor cells incorporation into the functional capillary network, and an increase in apoptotic cells in LLC xenografts. Gene array analysis of tumor tissues showed a decrease in gene expression in pathways that promote tumor angiogenesis and cell survival. Blocking p75 by short-hairpin RNA in cultured LLCs led to increases in TNF-mediated apoptosis, as well as decreases in the constitutive and TNF-mediated expression of angiogenic growth factors (VEGF, HGF, PLGF), and SDF-1alpha receptor CXCR4. In summary, p75 is essential for tumor angiogenesis and survival in highly vascularized murine lung tumor xenografts. Blocking p75 expression may lead to tumor regression. This may represent new and effective therapy against lung neoplasms and potentially tumors of other origin. FAU - Sasi, S P AU - Sasi SP AD - Center of Cancer Systems Biology, Brighton, MA 02135, USA. FAU - Yan, X AU - Yan X FAU - Enderling, H AU - Enderling H FAU - Park, D AU - Park D FAU - Gilbert, H-Y AU - Gilbert HY FAU - Curry, C AU - Curry C FAU - Coleman, C AU - Coleman C FAU - Hlatky, L AU - Hlatky L FAU - Qin, G AU - Qin G FAU - Kishore, R AU - Kishore R FAU - Goukassian, D A AU - Goukassian DA LA - eng GR - R01 HL091983/HL/NHLBI NIH HHS/United States GR - R21 AG026777/AG/NIA NIH HHS/United States GR - HL091983/HL/NHLBI NIH HHS/United States GR - 5R21AG026777-02/AG/NIA NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. DEP - 20111212 PL - England TA - Oncogene JT - Oncogene JID - 8711562 RN - 0 (CXCR4 protein, mouse) RN - 0 (Chemokine CXCL12) RN - 0 (Pgf protein, mouse) RN - 0 (Pregnancy Proteins) RN - 0 (RNA, Small Interfering) RN - 0 (Receptors, CXCR4) RN - 0 (Receptors, Tumor Necrosis Factor, Type I) RN - 0 (Receptors, Tumor Necrosis Factor, Type II) RN - 0 (Tumor Necrosis Factor-alpha) RN - 0 (Vascular Endothelial Growth Factors) RN - 144589-93-5 (Placenta Growth Factor) RN - 67256-21-7 (Hepatocyte Growth Factor) RN - EC 2.7.11.24 (p38 Mitogen-Activated Protein Kinases) SB - IM MH - Animals MH - Apoptosis MH - Bone Marrow Cells MH - Carcinoma, Lewis Lung/*metabolism/pathology MH - Cell Line, Tumor MH - Cell Proliferation MH - Chemokine CXCL12/biosynthesis MH - Hepatocyte Growth Factor/biosynthesis MH - Melanoma, Experimental/*metabolism/pathology MH - Mice MH - Mice, Inbred C57BL MH - Mice, Knockout MH - Neovascularization, Pathologic/*genetics MH - Placenta Growth Factor MH - Pregnancy Proteins/biosynthesis MH - RNA Interference MH - RNA, Small Interfering MH - Receptors, CXCR4/biosynthesis MH - Receptors, Tumor Necrosis Factor, Type I/genetics/metabolism MH - Receptors, Tumor Necrosis Factor, Type II/genetics/*metabolism MH - Transplantation, Heterologous MH - Tumor Microenvironment MH - Tumor Necrosis Factor-alpha/*metabolism MH - Vascular Endothelial Growth Factors/biosynthesis MH - p38 Mitogen-Activated Protein Kinases/biosynthesis/metabolism PMC - PMC3962797 MID - NIHMS560265 EDAT- 2011/12/14 06:00 MHDA- 2012/12/10 06:00 PMCR- 2014/03/23 CRDT- 2011/12/14 06:00 PHST- 2011/12/14 06:00 [entrez] PHST- 2011/12/14 06:00 [pubmed] PHST- 2012/12/10 06:00 [medline] PHST- 2014/03/23 00:00 [pmc-release] AID - onc2011567 [pii] AID - 10.1038/onc.2011.567 [doi] PST - ppublish SO - Oncogene. 2012 Sep 13;31(37):4117-27. doi: 10.1038/onc.2011.567. Epub 2011 Dec 12.