نتایج جستجو برای: jak2
تعداد نتایج: 4657 فیلتر نتایج به سال:
Abnormalities in the JAK2/STAT3 pathway are involved in the pathogenesis of colorectal cancer (CRC), including apoptosis. However, the exact mechanism by which dysregulated JAK2/STAT3 signalling contributes to the apoptosis has not been clarified. To investigate the role of both JAK2 and STAT3 in the mechanism underlying CRC apoptosis, we inhibited JAK2 with AG490 and depleted STAT3 with a smal...
The JAK2-V617F mutation occurs in about 50% of patients with myelofibrosis and might be a reliable marker to monitor residual disease after allogeneic stem cell transplantation. We describe a new, highly sensitive (>or= 0.01%) real-time polymerase chain reaction (PCR) to monitor and quantify V617F-JAK2-positive cells after dose-reduced allogeneic stem cell transplantation. After 22 allogeneic s...
Cytokines are deregulated in cancers and can contribute to tumor growth. In patients with diffuse large-cell lymphoma (DLBCL), we observed higher levels of JAK/STAT pathway-related serum cytokines (ie, IL-6, IL-10, epidermal growth factor, and IL-2) compared with controls. Of these, only IL-10 activated the JAK2 pathway in lymphoma cells in vitro. Patients with high serum IL-10 had shorter even...
Members of the Jak family play a critical role in signal transduction mediated by cytokine and hormone receptors. In this study, we report the cloning and characterization of human Jak2. The predicted amino acid sequence shows 91% homology to the described murine Jak2, but with a significant difference in the extreme C-terminal sequence. Using the human cDNA as a probe, we localized the gene fo...
OBJECTIVE Polycythemia vera (PV) is a clonal myeloproliferative neoplasia associated with the activation of the Janus-activating kinase 2 (JAK2) mutation. The aim of this study is to identify clonal expansion of exon 12 mutations. METHODS We performed DNA sequencing of the JAK2 exon 12 after TA-cloning in JAK2-V617F-negative and JAK2-V617F-positive PV patients. RESULTS AND CONCLUSIONS We fo...
Results Control subjects with a normal haematological profiles were all JAK2 V617F negative and expressed a variable amount of platelet Mpl protein (mean 80%±17, n=20). Patients with a myeloproliferative disease were variably positive for the mutation with JAK2 V617F detected in 73% of PV and 63% of ET patients. In these myeloproliferative patients, Mpl was reduced compared to the control group...
چکیده سابقه و هدف نئوپلاسمهای میلوپرولیفراتیو، از جمله بدخیمیهای خونی هستند که علایم بالینی بسیار متغیری دارند. تقسیمبندی بیماران میلوپرولیفراتیو به دو گروه دارای کروموزوم فیلادلفیا(Ph+) و فاقد آن(Ph-) میباشد. در گروه Ph- ، بیماریهای پلیسایتمیورا، ترومبوسایتمی اساسی، میلوفیبروز اولیه و دیگر بیماریهای نادر قرار میگیرد. این گروه از بیماران دارای جهش JAK2 V617F میباشند که با درصدهای مخت...
Activating alleles of Janus kinase 2 (JAK2) such as JAK2(V617F) are central to the pathogenesis of myeloproliferative neoplasms (MPN), suggesting that small molecule inhibitors targeting JAK2 may be therapeutically useful. We have identified an aminopyrimidine derivative (CYT387), which inhibits JAK1, JAK2, and tyrosine kinase 2 (TYK2) at low nanomolar concentrations, with few additional target...
Purpose:We determined the activity of hsp90 inhibitor, and/or Janus-activated kinase 2 (JAK2) tyrosine kinase inhibitor (TKI), against JAK2-V617F–expressing cultured mouse (Ba/F3-JAK2-V617F) and human (HEL92.1.7 and UKE-1) or primary human CD34þ myeloproliferative neoplasm (MPN) cells. Experimental Design: Following exposure to the hsp90 inhibitor AUY922 and/or JAK2-TKI TG101209, the levels of ...
To design rational therapies for JAK2-driven hematological malignancies, we functionally dissected the key survival pathways downstream of hyperactive JAK2. In tumors driven by mutant JAK2, Stat1, Stat3, Stat5, and the Pi3k and Mek/Erk pathways were constitutively active, and gene expression profiling of TEL-JAK2 T-ALL cells revealed the upregulation of prosurvival Bcl-2 family genes. Combining...
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