Blar i forfatter "Valkov, Andrey Yurjevich"

Viser treff 1-17 av 17

    • Fibroblast growth factor 2 orchestrates angiogenic networking in non-GIST STS patients 

      Kilvær, Thomas Karsten; Valkov, Andrey Yurjevich; Sørbye, Sveinung Wergeland; Smeland, Eivind; Bremnes, Roy M.; Busund, Lill-Tove; Dønnem, Tom (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      Non-gastrointestinal stromal tumor soft-tissue sarcomas (non-GIST STSs) constitute a heterogeneous group of tumors with poor prognosis. Fibroblast growth factor 2 (FGF2) and fibroblast growth factor receptor-1 (FGFR-1), in close interplay with platelet-derived growth factor-B (PDGF-B) and vascular endothelial growth factor receptor-3 (VEGFR-3), are strongly involved in angiogenesis. This study ...

    • High expression of CD20+ lymphocytes in soft tissue sarcomas is a positive prognostic indicator 

      Sørbye, Sveinung Wergeland; Kilvær, Thomas Karsten; Valkov, Andrey Yurjevich; Dønnem, Tom; Smeland, Eivind; Al-Shibli, Khalid Ibrahim; Bremnes, Roy M.; Busund, Lill-Tove (Journal article; Tidsskriftartikkel, 2012)
      The immune status is important in cancer patients. Tissue microarrays from 249 patients with soft tissue sarcomas were constructed. Immunohistochemistry was used to evaluate the CD3+, CD4+, CD8+, CD20+ and CD45+ lymphocytes in tumors. High density of CD20+ lymphocytes is an independent positive prognostic indicator for these patients.

    • High tumor cell expression of microRNA-21 in node positive non-small cell lung cancer predicts a favorable clinical outcome 

      Stenvold, Helge; Dønnem, Tom; Andersen, Sigve; Al-Saad, Samer; Valkov, Andrey Yurjevich; Pedersen, Mona Irene; Busund, Lill-Tove; Bremnes, Roy M. (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)

    • Inhibitor of neuronal nitric oxide synthase improves gas exchange in ventilator-induced lung injury after pneumonectomy. 

      Suborov, Evgeny; Smetkin, Alexey Anatolievich; Kondratyev, Timofey; Valkov, Andrey Yurjevich; Kuzkov, Vsevolod; Kirov, Mikhail; Bjertnæs, Lars J. (Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
      Mechanical ventilation with high tidal volumes may cause ventilator-induced lung injury (VILI) and enhanced generation of nitric oxide (NO). We demonstrated in sheep that pneumonectomy followed by injurious ventilation promotes pulmonary edema. We wished both to test the hypothesis that neuronal NOS (nNOS), which is distributed in airway epithelial and neuronal tissues, could be involved in the ...

    • Molecular prognostic markers in soft tissue sarcomas 

      Valkov, Andrey Yurjevich (Doctoral thesis; Doktorgradsavhandling, 2012-09-06)
      Soft tissue sarcomas (STS) is a group of malignant tumors arising from extraskeletal connective tissues. They are rare tumors and show high mortality rates. In our study, we sought to elucidate the prognostic impact of molecular factors participating in regulating tumor cell behaviour from benign to malignant and to unravel the impact of the tissue expression of these factors on patients’ survival. ...

    • Profiling of VEGFs and VEGFRs as prognostic factors in soft tissue sarcoma: VEGFR-3 is an independent predictor of poor prognosis 

      Smeland, E; Kilvær, Thomas Karsten; Valkov, Andrey Yurjevich; Sørbye, Sveinung Wergeland; Bremnes, Roy M.; Busund, Lill-Tove Rasmussen; Dønnem, Tom (Journal article; Tidsskriftartikkel; Peer reviewed, 2010)

    • The prognostic impact of Akt isoforms, PI3K and PTEN related to female steroid hormone receptors in soft tissue sarcomas 

      Valkov, Andrey Yurjevich; Kilvær, Thomas Karsten; Sørbye, Sveinung Wergeland; Dønnem, Tom; Smeland, Eivind; Bremnes, Roy M.; Busund, Lill-Tove (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      The PI3K/Akt pathway is involved in cellular survival pathways by inhibiting apoptotic processes and stimulating cell growth and proliferation. Its negative prognostic value has been proven in many types of cancer. In soft tissue sarcomas, the expression profiles of the PI3K/Akt pathway components are poorly defined and their significance uncertain. We aimed to investigate the prognostic impact of ...

    • Prognostic impact of CD57, CD68, M-CSF, CSF-1R, Ki67 and TGF-beta in soft tissue sarcomas 

      Sørbye, Sveinung Wergeland; Kilvær, Thomas Karsten; Valkov, Andrey Yurjevich; Dønnem, Tom; Smeland, Eivind; Al-Shibli, Khalid Ibrahim; Bremnes, Roy M.; Busund, Lill-Tove (Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
      BACKGROUND: Prognostic markers in curable STS may have the potential to guide therapy after surgical resection. The purpose of this study was to clarify the prognostic impact of the presence of cells and growth factors belonging to the innate immune system in soft tissue sarcomas (STS). The significance of macrophages (CD68), their growth factor macrophage colony-stimulating factor (M-CSF), its ...

    • Prognostic Impact of Jab1, p16, p21, p62, Ki67 and Skp2 in Soft Tissue Sarcomas 

      Sørbye, Sveinung Wergeland; Kilvær, Thomas Karsten; Valkov, Andrey Yurjevich; Dønnem, Tom; Smeland, Eivind; Al-Shibli, Khalid; Bremnes, Roy M.; Busund, Lill-Tove (Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
      Purpose The purpose of this study is to clarify the prognostic significance of expression of Jab1, p16, p21, p62, Ki67 and Skp2 in soft tissue sarcomas (STS). Optimised treatment of STS requires better identification of high risk patients who will benefit from adjuvant therapy. The prognostic significance of Jab1, p16, p21, p62, Ki67 and Skp2 in STS has not been sufficiently investigated. ...

    • Prognostic Impact of Lymphocytes in Soft Tissue Sarcomas 

      Sørbye, Sveinung Wergeland; Kilvær, Thomas Karsten; Valkov, Andrey Yurjevich; Dønnem, Tom; Smeland, Eivind; Al-Shibli, Khalid Ibrahim; Bremnes, Roy M.; Busund, Lill-Tove (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      The purpose of this study was to clarify the prognostic significance of lymphocyte infiltration in soft tissue sarcomas (STS). Prognostic markers in potentially curable STS should guide therapy after surgical resection. The immune status at the time of resection may be important, but the prognostic significance of tumor infiltrating lymphocytes is controversial as the immune system has conflicting ...

    • Prognostic impact of peritumoral lymphocyte infiltration in soft tissue sarcomas 

      Sørbye, Sveinung Wergeland; Kilvær, Thomas Karsten; Valkov, Andrey Yurjevich; Dønnem, Tom; Smeland, Eivind; Al-Shibli, Khalid Ibrahim; Bremnes, Roy M.; Busund, Lill-Tove (Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
      BACKGROUND: The purpose of this study was to clarify the prognostic significance of peritumoral lymphocyte infiltration in the capsule of soft tissue sarcomas (STS). Multiple observations in preclinical and clinical studies have shown that the immune system has a role in controlling tumor growth and progression. Prognostic markers in potentially curable STS should guide therapy after surgical ...

    • Prognostic impact of Skp2, ER and PGR in male and female patients with soft tissue sarcomas 

      Sørbye, Sveinung Wergeland; Kilvær, Thomas Karsten; Valkov, Andrey Yurjevich; Dønnem, Tom; Smeland, Eivind; Al-Shabli, Khalid; Bremnes, Roy M.; Busund, Lill-Tove (Journal article; Tidsskriftartikkel; Peer reviewed, 2013)
      BACKGROUND: S-phase kinase-associated protein 2 (Skp2) is a member of mammalian F-box proteins. The purpose of this study is to clarify the prognostic significance of expression of Skp2 related to gender, estrogen receptor (ER) and progesterone receptor (PGR) in soft tissue sarcomas (STS). Optimized treatment of STS requires better identification of high-risk patients who will benefit from adjuvant ...

    • The Prognostic Impact of TGF-beta 1, Fascin, NF-kappa B and PKC-zeta Expression in Soft Tissue Sarcomas 

      Valkov, Andrey Yurjevich; Sørbye, Sveinung Wergeland; Kilvær, Thomas Karsten; Dønnem, Tom; Smeland, Eivind; Bremnes, Roy M.; Busund, Lill-Tove (Journal article; Tidsskriftartikkel; Peer reviewed, 2011)
      Transforming growth factor-β (TGF-β), fascin, nuclear factor-kappa B (NF-κB) p105, protein-kinase C-zeta (PKC-ζ), partioning-defective protein-6 (Par-6), E-cadherin and vimentin are tumor promoting molecules through mechanisms involved in cell dedifferentiation. In soft tissue sarcomas, their expression profile is poorly defined and their significance is uncertain. We aimed to investigate the ...

    • Prognostic Impacts of Hypoxic Markers in Soft Tissue Sarcoma 

      Smeland, Eivind; Kilvær, Thomas Karsten; Sørbye, Sveinung Wergeland; Valkov, Andrey Yurjevich; Andersen, Sigve; Bremnes, Roy M.; Busund, Lill-Tove; Dønnem, Tom (Journal article; Tidsskriftartikkel; Peer reviewed, 2012)
      We aimed to explore the prognostic impact of the hypoxia-induced factors (HIFαs) 1 and 2, the metabolic HIFregulated glucose transporter GLUT-1, and carbonic anhydrase IX (CAIX) in non-gastrointestinal stromal tumor soft tissue sarcomas (non-GIST STS). Methods. Duplicate cores with viable tumor tissue from206 patients with non-GIST STS were obtained and tissue microarrays were constructed. ...

    • Stromal Expression of MiR-21 Predicts Biochemical Failure in Prostate Cancer Patients with Gleason Score 6 

      Melbø-Jørgensen, Christian Nordahl; Ness, Nora; Andersen, Sigve; Valkov, Andrey Yurjevich; Dønnem, Tom; Al-Saad, Samer; Kiselev, Yury; Berg, Thomas; Nordby, Yngve; Bremnes, Roy M.; Busund, Lill-Tove; Richardsen, Elin (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)

    • SYK Inhibition Potentiates the Effect of Chemotherapeutic Drugs on Neuroblastoma Cells in Vitro 

      Tümmler, Conny; Dumitriu, Gianina; Wickström, Malin; Coopman, Peter; Valkov, Andrey Yurjevich; Kogner, Per; Johnsen, John Inge; Moens, Ugo; Sveinbjørnsson, Baldur (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-02-10)
      Neuroblastoma is a malignancy arising from the developing sympathetic nervous system and the most common and deadly cancer of infancy. New therapies are needed to improve the prognosis for high-risk patients and to reduce toxicity and late effects. Spleen tyrosine kinase (SYK) has previously been identified as a promising drug target in various inflammatory diseases and cancers but has so far not ...

    • The VEGF- and PDGF-family of angiogenic markers have prognostic impact in soft tissue sarcomas arising in the extremities and trunk 

      Kilvær, Thomas Karsten; Smeland, Eivind; Valkov, Andrey Yurjevich; Sørbye, Sveinung Wergeland; Bremnes, Roy M.; Busund, Lill-Tove; Dønnem, Tom (Journal article; Tidsskriftartikkel; Peer reviewed, 2014)
      Background: Soft-tissue sarcomas are rare malignant tumors of mesenchymal lineage that can arise in any part of the body. Prognosis, and hence also treatment may vary according to histologic subtype and localization. Angiogenesis is the process of forming new blood vessels from pre-existing ones. The deregulation of this process is thought to be an important step in malignant transformation. This ...