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Cancer Immune Therapy Edited by G. Stuhler and P. Walden ...

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X Contents<br />

6.4.2 Natural Killer (NK) Cells 101<br />

6.4.3. DCs 105<br />

6.4.4 Macrophages 107<br />

6.4.5 B Cells 108<br />

6.5 Mechanisms Linked to Dysfunction of <strong>Immune</strong> Cells in <strong>Cancer</strong> 108<br />

6.5.1 The CD95±CD95 Lig<strong>and</strong> (CD95L) Pathway 110<br />

6.5.2 T Lymphocyte Apoptosis in Patients with <strong>Cancer</strong> 111<br />

6.5.3 Tumor Sensitivity to FasL-Mediated Signals 111<br />

6.5.4 A Dual Biologic Role of FasL 112<br />

6.5.5 Contributions of other Pathways to Lymphocyte Demise in <strong>Cancer</strong> 112<br />

6.6 Conclusions 113<br />

References 115<br />

7 Immunosuppressive Factors in <strong>Cancer</strong> 119<br />

Richard Bucala <strong>and</strong> Christine N. Metz<br />

7.1 Introduction 119<br />

7.1 Transforming Growth Factor (TGF)-b 119<br />

7.1.1 Sources of TGF-b 121<br />

7.1.2 Effects of TGF-b 121<br />

7.1.2.1 Effects of TGF-b on monocytes/macrophages 121<br />

7.1.2.2 Effects of TGF-b on T lymphocytes 122<br />

7.1.2.3 Effects of TGF-b on NK <strong>and</strong> lymphokine-activated killer (LAK)<br />

activity 123<br />

7.1.2.4 Effects of TGF-1;b on dendritic cells (DCs) 123<br />

7.1.3 Inhibition of TGF-b: Implications for <strong>Therapy</strong> 124<br />

7.2 IL-10 125<br />

7.2.1 Sources of IL-10 125<br />

7.2.2 Effects of IL-10 126<br />

7.2.2.1 Effects of IL-10 on monocytes/macrophages 126<br />

7.2.2.2 Effects of IL-10 on T lymphocytes 126<br />

7.2.2.3 Effects of IL-10 on NK cells 128<br />

7.2.2.4 Effects of IL-10 on DCs 128<br />

7.2.3 Inhibition of IL-10: Implications for <strong>Therapy</strong> 128<br />

7.2.3.1 Antibodies 129<br />

7.2.3.2 Drugs 129<br />

7.2.3.3 Removal of the source of IL-10 129<br />

7.3 Macrophage Migration Inhibitory Factor (MIF) 130<br />

7.4 Prostagl<strong>and</strong>in (PG) E2 131<br />

7.4.1 Sources of PGE2 131<br />

7.4.2 Effects of PGE2 131<br />

7.4.2.1 Effects of PGE 2 on monocytes/macrophages 131<br />

7.4.2.2 Effects of PGE2 on T lymphocytes 131<br />

7.4.2.3 Effects of PGE2 on NK cells <strong>and</strong> LAK activity 132<br />

7.4.3 Inhibition of PGE2: Implications for <strong>Therapy</strong> 132<br />

7.5 Polyamines 132

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