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Tumor immunology.

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Presentation on theme: "Tumor immunology."— Presentation transcript:

1 Tumor immunology

2 Content IMMUNOLOGICAL SURVEILLANCE TUMOR ANTIGENS
EFFECTOR MECHANISMS IN ANTI-TUMOR IMMUNITY MECHANISMS OF EVASION OF THE IMMUNE SYSTEM BY TUMORS TUMOR IMMUNOTHERAPY

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6 Immunosurveillance Physiological function of the immune system to recognize and destroy malignantly transformed cells before they grow into tumors, or to kill tumors after they are formed

7 Tumor antigens Tumor-specific antigens (TSA)
Antigens expressed on tumor cells but not on normal cells Tumor-associated antigens (TAA) Antigens expressed concurently on normal cells

8 Figure 14-12

9 Figure 14-12

10 Figure 14-13

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12 Effector mechanisms in anti-tumor immunity
T lymphocytes NK cells Antibodies Macrophages

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16 Effector mechanisms in anti-tumor immunity
T lymphocytes NK cells Antibodies Macrophages

17 Figure 1-6

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19 Figure 9-34 part 1 of 2

20 Figure 9-34 part 2 of 2

21 Effector mechanisms in anti-tumor immunity
T lymphocytes NK cells Antibodies Macrophages

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24 Effector mechanisms in anti-tumor immunity
T lymphocytes NK cells Antibodies Macrophages

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28 Mechanisms of evasion of the immune response by tumors

29 IMPORTANT ISSUES IN DESIGNING EFFECTIVE CANCER VACCINE
Too less good things for initiation of antitumor immune response Failure to produce and/or present antigen Failure to activate T cells Too many bad things for maintenance of an effective antitumor immune response Immunosuppresive cytokines Induction of immunoprivileges Induction of regulatory cells

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31 Figure part 1 of 2

32 Figure part 2 of 2

33 Tumor immunotherapy Nonspecific Specific Passive Active Vaccination
Monoclonal Abs adoptive (LAK, TIL) Active Vaccination

34 Figure 14-17

35 IMPORTANT ISSUES IN DESIGNING EFFECTIVE CANCER VACCINE
To identify potent tumor rejection antigens To stimulate an effective antitumor immune response To avoid autoimmune pathology

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