Id |
Subject |
Object |
Predicate |
Lexical cue |
S1 |
0-114 |
Sentence |
denotes |
Mechanism of interleukin-10 inhibition of T-helper cell activation by superantigen at the level of the cell cycle. |
S2 |
115-305 |
Sentence |
denotes |
We have analyzed the effects of interleukin-10 (IL-10) on the entry of quiescent CD4(+) T cells into the cell cycle upon stimulation with the superantigen staphylococcal enterotoxin B (SEB). |
S3 |
306-336 |
Sentence |
denotes |
IL-10 arrested cells at G0/G1. |
S4 |
337-482 |
Sentence |
denotes |
IL-10 treatment prevented the downregulation of p27(Kip1), an inhibitory protein that controls progression out of the G0 phase of the cell cycle. |
S5 |
483-634 |
Sentence |
denotes |
IL-10 also prevented the upregulation of the G1 cyclins D2 and D3, proteins necessary for entry and progression through the G1 phase of the cell cycle. |
S6 |
635-740 |
Sentence |
denotes |
Associated with the inhibition of the cell cycle, IL-10 suppressed SEB induction of interleukin-2 (IL-2). |
S7 |
741-853 |
Sentence |
denotes |
Addition of exogenous IL-2 to IL-10-treated cells significantly reversed the antiproliferative effects of IL-10. |
S8 |
854-969 |
Sentence |
denotes |
Moreover, IL-10 effects on the early G1 proteins p27(Kip1) and cyclin D2 were similarly reversed by exogenous IL-2. |
S9 |
970-1141 |
Sentence |
denotes |
Although this reversal by IL-2 was pronounced, it was not complete, suggesting that IL-10 may have some effects not directly related to the suppression of IL-2 production. |
S10 |
1142-1318 |
Sentence |
denotes |
Cell separation experiments suggest that IL-10 can effect purified CD4(+) T cells directly, providing functional evidence for the presence of IL-10 receptors on CD4(+) T cells. |
S11 |
1319-1443 |
Sentence |
denotes |
IL-10 also inhibited expression of IL-2 transcriptional regulators c-fos and c-jun, which also inhibit other cell functions. |
S12 |
1444-1707 |
Sentence |
denotes |
Our studies show that the mechanism of IL-10 regulation of quiescent CD4(+) T-cell activation is mainly by blocking induction of IL-2 that is critical to downregulation of p27(Kip1) and upregulation of D cyclins in T-cell activation and entry into the cell cycle. |