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PMID |
Sentence |
1 |
10799542
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Tyr(985)-mediated recruitment of SHP-2 does not alter tyrosine phosphorylation of Jak2 or STAT3 but results in GRB-2 binding to tyrosine-phosphorylated SHP-2 and is required for the majority of ERK activation during LRb signaling.
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2 |
11967010
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The HG and Ang II induced growth and collagen IV synthesis studies were performed in GMC transfected with JAK2 antisense or JAK2 sense.
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3 |
11967010
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Transfection of GMC with JAK2 antisense oligonucleotides blocked the Ang II-induced growth and collagen IV synthesis in both NG and HG conditions.
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4 |
11970889
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In this issue of Developmental Cell, two groups identify protein tyrosine phosphatase 1B (PTP1B) as a cause of leptin resistance through dephosphorylation of Jak2.
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5 |
12941779
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We recently found that activation of janus kinase 2 (JAK2) is essential for the Ang II-induced proliferation of vascular smooth muscle cells (VSMCs) and that high glucose augments Ang II-induced proliferation of VSMCs by increasing signal transduction through activation of JAK2.
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6 |
15143188
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Mutation of Tyr(570) does not alter the ability of SOCS3 to bind or inhibit Jak2, however.
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7 |
15378031
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A newly developed bridging yeast tri-hybrid assay showed that APS dimerizes JAK2, insulin receptor and IGF1 receptor kinases using its SH2 and dimerization domains.
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8 |
15601754
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Treatment of rat VSMCs with 5-HT (10(-6) M) resulted in time-dependent activation ( approximately 2-fold) of JAK2, JAK1, and STAT1, but not STAT3 (maximal at 5 min, returned to baseline by 30 min).
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9 |
15601754
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Treatment with the 5-HT2A receptor antagonist ketanserin (10 nM) inhibited JAK2 activation by 5-HT.
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10 |
15601754
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Treatment of streptozotocin-induced diabetic rats with ketanserin (5 mg.kg-1.day-1) reduced activation of JAK2 and STAT1 but not STAT3 in endothelium-denuded thoracic aorta in vivo. 5-HT (10(-6) M) treatment resulted in increased cell proliferation and increased DNA synthesis, which were inhibited by the JAK2 inhibitor AG490.
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11 |
15767667
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Consistent with previous reports, we further show that the SH2 domains of SH2-B and APS bind JAK2 at Tyr813.
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12 |
15767667
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At lower levels of SH2-B or APS expression, dimerization approximates two JAK2 molecules to induce transactivation.
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13 |
15767667
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SH2-B or APS homodimerization and SH2-B/APS heterodimerization thus provide direct mechanisms for activating and inhibiting JAK2 and other kinases from the inside of the cell and for potentiating or attenuating cytokine and growth factor receptor signaling when ligands are present.
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14 |
15950750
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Insulin alone down-regulated the leptin signaling pathway, JAK-2 association with ObR decreased at all time-points, and JAK-2 phosphorylation decreased similarly.
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15 |
15950750
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Leptin alone also appeared to down-regulate JAK-2 association with the ObR, but stimulated the down-regulated pathway to signal, JAK-2 tyrosine phosphorylation being increased at later time-points.
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16 |
15950750
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Pretreatment with leptin followed by insulin time-course showed marked up-regulation of the early leptin signaling pathway, JAK-2 association with the ObR being increased by insulin while JAK-2 tyrosine phosphorylation was also increased.
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17 |
16389635
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At an early intracellular level, angiotensin II, acting through JAK-2/IRS-1/PI3-kinase, JNK and ERK, may induce the serine phosphorylation and inhibition of key elements of the insulin-signaling pathway.
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18 |
16876574
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Leptin activates Janus-activating kinase2 (Jak2) and STAT 3, resulting in stimulation of anorexigenic peptides, e.g., alpha-MSH and CART, and inhibition of orexigenic peptides, e.g., NPY and AGRP.
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19 |
17488973
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GH receptor (GHR) is a cytokine receptor family member that responds to GH by activation of the receptor-associated tyrosine kinase, JAK2 (Janus family of tyrosine kinase 2).
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20 |
17488973
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We previously showed that JAK2, in addition to being a signal transducer, dramatically increases the half-life of mature GHR, partly by preventing constitutive GHR down-regulation.
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21 |
17488973
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In cells that expressed JAK2, but not cells lacking JAK2, GH markedly enhanced GHR degradation.
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22 |
17488973
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Interestingly, GH-induced GHR ubiquitination, like down-regulation, was prevented in cells expressing a kinase-deficient JAK2 protein.
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23 |
17488973
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Collectively, our data suggest that determinants required for JAK2 to protect mature GHR from constitutive degradation differ from those that drive GH-induced GHR down-regulation.
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24 |
17488973
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The latter requires GH-induced JAK2 activation and GHR tyrosine phosphorylation and is correlated to GHR ubiquitination in our reconstitution system.
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25 |
17647198
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SHP-1 and SHP-2 modulate cellular signals that involve phosphatidylinositol 3-kinase, Akt, Janus kinase 2, signal transducer and activator of transcription proteins, mitogen-activating protein kinases, extracellular signal-related kinases, c-Jun-amino terminal kinases, and nuclear factor-kappaB.
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26 |
19136996
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Leptin binding to LepRb activates the associated Janus kinase-2 (Jak2) tyrosine kinase to promote the phosphorylation of Jak2 and three residues on LepRb; each of these sites mediates a distinct aspect of downstream LepRb signaling, with differing physiologic functions.
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27 |
19066310
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Leptin activates ERK1/2 in a receptor-mediated manner that involves JAK2.
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28 |
16449352
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We found that pretreatment with simvastatin significantly inhibited HG- and ANG II-induced collagen IV production, JAK2 activation, and phosphorylation of STAT1 and STAT3 in GMC.
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29 |
20068132
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Leptin binding to LepRb initiates signaling by activating the associated Janus kinase 2 (Jak2) tyrosine kinase, which promotes the phosphorylation of tyrosine residues on the intracellular tail of LepRb.
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30 |
20068132
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We inserted sequences encoding a truncated LepRb mutant (LepRb(Delta65c), which activates Jak2 normally, but is devoid of other LepRb intracellular sequences) into the mouse Lepr locus.
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31 |
20068132
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The ability of Jak2-autonomous LepRb signals to modulate glucose homeostasis in Delta/Delta animals suggests a role for these signals in leptin action.
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32 |
20068132
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Because Jak2-autonomous LepRb signals fail to mediate most leptin action, however, signals from other LepRb intracellular sequences predominate.
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33 |
21620963
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In addition, Epo was able to increase cytosolic Ca(2+) with dependence on extracellular calcium influx and this effect was blocked by either JAK2 or PI3K inhibition.
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34 |
20484460
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In cultured cells, SH2B1 promotes leptin and insulin signaling by binding via its SH2 domain to phosphorylated tyrosines in Janus kinase 2 and the insulin receptor, respectively.
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35 |
21929289
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In our study, we examined the role of PKC and PDGF receptor on JAK2 and STAT1 phosphorylation under high glucose (HG) condition (25 mmol/L) in response to Ang II in cultured vascular smooth muscle cells (VSMC).
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36 |
21929289
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High glucose markedly increased the phosphorylation of tyrosine residues of JAK2 and serine residues of STAT 1 compared with cells cultured in NG (5.5 mmol/L) with and without Ang II stimulation.
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