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PMID |
Sentence |
1 |
18593820
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The present study was undertaken to determine how tumour necrosis factor-alpha (TNF-alpha) elicits the inhibition of glucose-stimulated insulin secretion (GSIS) in rat insulinoma cells (INS)-1 beta-cells.
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2 |
18593820
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TNF-alpha pretreatment did not change the expression levels of insulin, PDX-1, glucose transporter 2, glucokinase, K(ATP) channels, Ca(2)(+) channels, and exocytotic molecules and, furthermore, did not reduce the glucose-stimulated ATP level.
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3 |
18593820
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The TNF-alpha treatment was thought to activate c-Jun N-terminal kinase (JNK), p38 mitogen-activated protein kinase (MAPK), and NF-kappaB inflammatory signals, since TNF-alpha increased phospho-JNK and phospho-p38 and reduced I kappaB levels.
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4 |
18593820
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Overexpression of MEKK3, a possible mediator from the TNF-alpha receptor to the JNK/p38 and NK-kappaB signaling cascade, increased the levels of phospho-JNK, phospho-p38, and NF-kappaB, and reduced the glucose-stimulated Ca(2)(+) influx and GSIS.
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5 |
18593820
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The reduction of the Ca(2)(+) influx and GSIS in MEKK3-overexpressing INS-1 cells was also prevented by inhibitors of JNK, p38, and NF-kappaB.
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6 |
18593820
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These data demonstrate that TNF-alpha inhibits GSIS by reducing the glucose-stimulated Ca(2)(+) influx, possibly through the activation of JNK and p38 MAPK and NF-kappaB inflammatory signals.
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7 |
18593820
|
The present study was undertaken to determine how tumour necrosis factor-alpha (TNF-alpha) elicits the inhibition of glucose-stimulated insulin secretion (GSIS) in rat insulinoma cells (INS)-1 beta-cells.
|
8 |
18593820
|
TNF-alpha pretreatment did not change the expression levels of insulin, PDX-1, glucose transporter 2, glucokinase, K(ATP) channels, Ca(2)(+) channels, and exocytotic molecules and, furthermore, did not reduce the glucose-stimulated ATP level.
|
9 |
18593820
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The TNF-alpha treatment was thought to activate c-Jun N-terminal kinase (JNK), p38 mitogen-activated protein kinase (MAPK), and NF-kappaB inflammatory signals, since TNF-alpha increased phospho-JNK and phospho-p38 and reduced I kappaB levels.
|
10 |
18593820
|
Overexpression of MEKK3, a possible mediator from the TNF-alpha receptor to the JNK/p38 and NK-kappaB signaling cascade, increased the levels of phospho-JNK, phospho-p38, and NF-kappaB, and reduced the glucose-stimulated Ca(2)(+) influx and GSIS.
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11 |
18593820
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The reduction of the Ca(2)(+) influx and GSIS in MEKK3-overexpressing INS-1 cells was also prevented by inhibitors of JNK, p38, and NF-kappaB.
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12 |
18593820
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These data demonstrate that TNF-alpha inhibits GSIS by reducing the glucose-stimulated Ca(2)(+) influx, possibly through the activation of JNK and p38 MAPK and NF-kappaB inflammatory signals.
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13 |
20720201
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MEKK3 overexpression contributes to the hyperresponsiveness of IL-12-overproducing cells and CD4+ T conventional cells in nonobese diabetic mice.
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14 |
20720201
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Aberrant p38 activation induced by various inflammatory stimuli in IL-12-overproducing cells is not due to defective MAPK phosphatase-1 induction in NOD mice.
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15 |
20720201
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Deviated IKK and MAPKs activation also occurs in NOD CD4(+) Tconv cells, which is associated with higher rates of proliferation.
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16 |
20720201
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All of the above evidence suggests that the signaling defects occur at the level of MAPK kinase kinase (MAK3K or MEKK).
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17 |
20720201
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Further exploration shows that MEKK3, but not other MAP3Ks, is overexpressed in NOD IL-12-overproducing cells and CD4(+) Tconv cells independent of autoimmune inflammation.
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18 |
20720201
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MEKK3 knockdown leads to reversal of the deviated IKK and MAPKs activation, resulting in reduced IL-12 production and decreased CD4(+) Tconv cell proliferation.
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19 |
20720201
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MEKK3 overexpression contributes to the hyperresponsiveness of IL-12-overproducing cells and CD4+ T conventional cells in nonobese diabetic mice.
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20 |
20720201
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Aberrant p38 activation induced by various inflammatory stimuli in IL-12-overproducing cells is not due to defective MAPK phosphatase-1 induction in NOD mice.
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21 |
20720201
|
Deviated IKK and MAPKs activation also occurs in NOD CD4(+) Tconv cells, which is associated with higher rates of proliferation.
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22 |
20720201
|
All of the above evidence suggests that the signaling defects occur at the level of MAPK kinase kinase (MAK3K or MEKK).
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23 |
20720201
|
Further exploration shows that MEKK3, but not other MAP3Ks, is overexpressed in NOD IL-12-overproducing cells and CD4(+) Tconv cells independent of autoimmune inflammation.
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24 |
20720201
|
MEKK3 knockdown leads to reversal of the deviated IKK and MAPKs activation, resulting in reduced IL-12 production and decreased CD4(+) Tconv cell proliferation.
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25 |
20720201
|
MEKK3 overexpression contributes to the hyperresponsiveness of IL-12-overproducing cells and CD4+ T conventional cells in nonobese diabetic mice.
|
26 |
20720201
|
Aberrant p38 activation induced by various inflammatory stimuli in IL-12-overproducing cells is not due to defective MAPK phosphatase-1 induction in NOD mice.
|
27 |
20720201
|
Deviated IKK and MAPKs activation also occurs in NOD CD4(+) Tconv cells, which is associated with higher rates of proliferation.
|
28 |
20720201
|
All of the above evidence suggests that the signaling defects occur at the level of MAPK kinase kinase (MAK3K or MEKK).
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29 |
20720201
|
Further exploration shows that MEKK3, but not other MAP3Ks, is overexpressed in NOD IL-12-overproducing cells and CD4(+) Tconv cells independent of autoimmune inflammation.
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30 |
20720201
|
MEKK3 knockdown leads to reversal of the deviated IKK and MAPKs activation, resulting in reduced IL-12 production and decreased CD4(+) Tconv cell proliferation.
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31 |
23741327
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Our numerical simulations and experiments on a system comprising branches with JNK and p38MAPK as terminal molecules respectively that share a common MAP3K enzyme MEKK3/4 show that perturbing an enzyme in one branch can result in a series of changes in the activity levels of molecules "upstream" to the enzyme that eventually reaches the branch-point and affects other branches.
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