Tumor evasion of humoral immunity mediated by proteolytic impairment of antibody triggered immune effector function

Effector triggered immunity

Pathogenic bacteria produce virulence factors called effectors, which are important components of the infection process. Effectors aid in pathogenesis by facilitating bacterial attachment, pathogen entry into or exit from the host cell, immunoevasion, and immunosuppression. Effectors also have the ability to subvert host cellular processes, such as hijacking cytoskeletal machinery or blocking p...

Humoral regulation of cell-mediated immunity to syngeneic tumor.

Inoculation i.p. of C57BL/6 mice with FBL-3 cells, a syngeneic Friend virus-induced leukemia, results in progressive growth of ascitic tumors; in contrast, s.c. inoculation of FBL-3 cells produces transient, localized tumor growth; the recipients are then subsequently resistant to further i.p. challenge of this tumor. Experiments were performed to study the effects of humoral factors that might...

Effector-mediated suppression of chitin-triggered immunity by magnaporthe oryzae is necessary for rice blast disease.

Plants use pattern recognition receptors to defend themselves from microbial pathogens. These receptors recognize pathogen-associated molecular patterns (PAMPs) and activate signaling pathways that lead to immunity. In rice (Oryza sativa), the chitin elicitor binding protein (CEBiP) recognizes chitin oligosaccharides released from the cell walls of fungal pathogens. Here, we show that the rice ...

Metastamir-mediated immune evasion

Metastases are responsible for more than 90% of cancer-related deaths. We have recently reported that miR-10b inhibits the expression of MICB, a stress-induced ligand of the activating natural killer (NK)-cell receptor NKG2D. Here, we discuss our findings, which link metastasis formation to immune evasion.

Humoral Immunity and Cell-Mediated Immunity