B-cell chronic lymphocytic leukaemia (B-CLL) cells were treated in vitro with CD40-ligand (CD40L) (CD154) or the protein kinase C modulator Bryostatin-1, exploring the effects on: (a) sensitivity to apoptosis induction by chemotherapeutic drugs (fludarabine, dexamethasone) or anti-Fas antibody; (b) expression of apoptosis-regulatory proteins (Bcl-2, Bcl-X, Mcl-1, Bax, Bak, BAG-1, Flip, XIAP); (c) expression of cell surface co-stimulatory antigens (CD80 [B7.1]; CD54 [ICAM-1]; CD70); and (d) expression of immune modulatory receptors (CD27, CD40, CD95 [Fas]).
B-cell chronic lymphocytic leukaemia (B-CLL) cells were treated in vitro with CD40-ligand (CD40L) (CD154) or the protein kinase C modulator Bryostatin-1, exploring the effects on: (a) sensitivity to apoptosis induction by chemotherapeutic drugs (fludarabine, dexamethasone) or anti-Fas antibody; (b) expression of apoptosis-regulatory proteins (Bcl-2, Bcl-X, Mcl-1, Bax, Bak, BAG-1, Flip, XIAP); (c) expression of cell surface co-stimulatory antigens (CD80 [B7.1]; CD54 [ICAM-1]; CD70); and (d) expression of immune modulatory receptors (CD27, CD40, CD95 [Fas]).
Common variable immune deficiency (CVID) is a primary immune deficiency characterized by low levels of serum immune globulins, lack of Ab, and reduced numbers of CD27+ memory B cells.
CD27-CD70 interaction could not induce apoptosis in either type of myeloma transfectant, and binding between Siva and CD27 was not detected. cDNA microarray (human apoptosis CHIP) analysis showed a significant upregulation of expression of the ectodermal neural cortex 1 (ENC1) gene by CD27-CD70 interaction compared with CD27 transfection alone.
CD27 is a co-stimulatory molecule of T cells, and inherited CD27 deficiency is characterized by high susceptibility to EBV infection, though the underlying pathological mechanisms have not yet been identified.
CD27 is a co-stimulatory molecule of T cells, and inherited CD27 deficiency is characterized by high susceptibility to EBV infection, though the underlying pathological mechanisms have not yet been identified.