| Id |
Subject |
Object |
Predicate |
Lexical cue |
| T124 |
0-39 |
Sentence |
denotes |
FcγR activating or inhibitory signaling |
| T125 |
40-167 |
Sentence |
denotes |
Effector functions that are initiated via the activating‐type FcγR occur by signaling via the ITAM pathway of immune receptors. |
| T126 |
168-352 |
Sentence |
denotes |
This well‐characterized pathway is used by BCR and T‐cell antigen receptors, the IgE receptor FcεRI and IgA receptor FcαRI (reviewed extensively by Hogarth and Pietersz 7 Anania et al. |
| T127 |
353-520 |
Sentence |
denotes |
11 and Getahun and Cambier 32) Induction of an activating signal requires the aggregation of activating FcγR by immune complexes, or by antigen in the case of the BCR. |
| T128 |
521-681 |
Sentence |
denotes |
This aggregation at the cell membrane results in specific tyrosine phosphorylation of the ITAM by Src kinases, thus initiating the activation cascade.32, 33, 34 |
| T129 |
682-1315 |
Sentence |
denotes |
The inhibitory‐type FcγRs, FcγRIIb1 and FcγRIIb2, whose expression is cell lineage restricted, modulate the ITAM signaling of the BCR or the activating‐type FcγRs, respectively.11 Their function is dependent on the immunoreceptor tyrosine inhibition motif in their cytoplasmic tail.32, 33 This checkpoint action requires that FcγRIIbs are coaggregated with the tyrosine‐phosphorylated ITAM‐signaling receptor complex which results also in immunoreceptor tyrosine inhibition motif tyrosine phosphorylation and consequential recruitment of lipid or protein tyrosine phosphatases that powerfully dampen the ITAM‐induced cell activation. |
