Id |
Subject |
Object |
Predicate |
Lexical cue |
S1 |
0-80 |
Sentence |
denotes |
Inhibition of protein phosphatases by okadaic acid induces AP1 in human T cells. |
S2 |
81-335 |
Sentence |
denotes |
To examine the role of protein phosphatases in T cell activation, Jurkat cells were treated with okadaic acid, an inhibitor of type 1 and 2A phosphatases, and nuclear extracts were examined for the presence of AP1 as a measure of early T cell activation. |
S3 |
336-389 |
Sentence |
denotes |
Okadaic acid was found to be a potent inducer of AP1. |
S4 |
390-594 |
Sentence |
denotes |
In contrast to phorbol esters such as phorbol myristate acetate (PMA), the induction of AP1 by okadaic acid occurs predominantly by transcriptional activation of the jun and fos family of proto-oncogenes. |
S5 |
595-722 |
Sentence |
denotes |
Surprisingly, while the addition of phytohemagglutinin further enhanced the induction of AP1, the addition of PMA inhibited it. |
S6 |
723-931 |
Sentence |
denotes |
Okadaic acid treatment was found to dramatically increase mRNA transcripts of the jun family of proto-oncogenes including c-jun, junD, and junB and to a lesser extent the fos family including c-fos and fra-1. |
S7 |
932-1020 |
Sentence |
denotes |
By comparison, PMA is a very inefficient inducer of the jun gene family in Jurkat cells. |
S8 |
1021-1141 |
Sentence |
denotes |
Similar to its effect on the induction of AP1 by okadaic acid, PMA inhibits the induction of c-jun mRNA by okadaic acid. |
S9 |
1142-1277 |
Sentence |
denotes |
Transfection of c-jun promoter constructs confirmed the marked difference between PMA and okadaic acid in inducing c-jun transcription. |
S10 |
1278-1476 |
Sentence |
denotes |
The induction of AP1 by okadaic acid suggests that protein phosphatases 1 and 2A (PP1 and PP2A) may be involved in T cell activation as important negative regulators of the transcription factor AP1. |