PlGF/VEGFR-1 signaling promotes macrophage polarization and accelerated tumor progression in obesity
PURPOSE: Obesity promotes pancreatic and breast cancer progression via mechanisms that are poorly understood. Although obesity is associated with increased systemic levels of placental growth factor (PlGF), the role of PlGF in obesity-induced tumor progression is not known. PlGF and its receptor vas...
Gespeichert in:
| Hauptverfasser: | , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
June 2016
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| In: |
Clinical cancer research
Year: 2016, Jahrgang: 22, Heft: 12, Pages: 2993-3004 |
| ISSN: | 1557-3265 |
| DOI: | 10.1158/1078-0432.CCR-15-1839 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1158/1078-0432.CCR-15-1839 Verlag, kostenfrei, Volltext: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4911258/ 
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| Verfasserangaben: | Joao Incio, Joshua Tam, Nuh N. Rahbari, Priya Suboj, Daniel T. McManus, Shan M. Chin, Trupti D. Vardam, Ana Batista, Suboj Babykutty, Keehoon Jung, Anna Khachatryan, Tai Hato, Jennifer Ligibel, Ian E. Krop, Stefan B. Puchner, Christopher L. Schlett, Udo Hoffmman, Marek Ancukiewicz, Masabumi Shibuya, Peter Carmeliet, Raquel Soares, Dan G. Duda, Rakesh K. Jain, and Dai Fukumura |
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| 245 | 1 | 0 | |a PlGF/VEGFR-1 signaling promotes macrophage polarization and accelerated tumor progression in obesity |c Joao Incio, Joshua Tam, Nuh N. Rahbari, Priya Suboj, Daniel T. McManus, Shan M. Chin, Trupti D. Vardam, Ana Batista, Suboj Babykutty, Keehoon Jung, Anna Khachatryan, Tai Hato, Jennifer Ligibel, Ian E. Krop, Stefan B. Puchner, Christopher L. Schlett, Udo Hoffmman, Marek Ancukiewicz, Masabumi Shibuya, Peter Carmeliet, Raquel Soares, Dan G. Duda, Rakesh K. Jain, and Dai Fukumura |
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| 520 | |a PURPOSE: Obesity promotes pancreatic and breast cancer progression via mechanisms that are poorly understood. Although obesity is associated with increased systemic levels of placental growth factor (PlGF), the role of PlGF in obesity-induced tumor progression is not known. PlGF and its receptor vascular endothelial growth factor receptor-1 (VEGFR-1) have been shown to modulate tumor angiogenesis and promote tumor-associated macrophage (TAM) recruitment and activity. Here, we hypothesized that increased activity of PlGF/VEGFR-1 signaling mediates obesity-induced tumor progression by augmenting tumor angiogenesis and TAM recruitment/activity. EXPERIMENTAL DESIGN: We established diet-induced obese mouse models of wild type C57BL/6, VEGFR-1 tyrosine kinase (TK)-null or PlGF null mice, and evaluated the role of PlGF/VEGFR-1 signaling in pancreatic and breast cancer mouse models and in human samples. RESULTS: We found that obesity increased TAM infiltration, tumor growth and metastasis in pancreatic cancers, without affecting vessel density. Ablation of VEGFR-1 signaling prevented obesity-induced tumor progression and shifted the tumor immune environment towards an anti-tumor phenotype. Similar findings were observed in a breast cancer model. Obesity was associated with increased systemic PlGF, but not VEGF-A or VEGF-B, in pancreatic and breast cancer patients and in various mouse models of these cancers. Ablation of PlGF phenocopied the effects of VEGFR-1-TK deletion on tumors in obese mice. PlGF/VEGFR-1-TK deletion prevented weight gain in mice fed a high-fat diet, but exacerbated hyperinsulinemia. Addition of metformin not only normalized insulin levels but also enhanced anti-tumor immunity. CONCLUSIONS: Targeting PlGF/VEGFR-1 signaling reprograms the tumor immune microenvironment and inhibits obesity-induced acceleration of tumor progression. | ||
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