Vascular endothelial cell growth factor (VEGF) binds to 2 related receptor tyrosine kinases, known as kinase insert domain-containing receptor (KDR) and fms-like tyrosine kinase (Flt-1). The KDR has been shown to mediate VEGF-stimulated endothelial cell mitogenesis, migration, and permeability. The Flt-1 receptor has been suggested to mediate VEGF-stimulated endothelial branching morphogenesis,...

Visualization of biological processes and pathologic conditions at the cellular and tissue levels largely relies on the use of fluorescence intensity signals from fluorophores or their bioconjugates. To overcome the concentration dependency of intensity measurements, evaluate subtle molecular interactions, and determine biochemical status of intracellular or extracellular microenvironments, flu...

Vascular endothelial growth factor (VEGF) is a potent angiogenic polypeptide that activates 2 distinct high-affinity tyrosine kinase receptors, flk-1/KDR and flt-1. In the present study, we characterized the expression of VEGF and its receptors flk-1/KDR and flt-1 in the normal human pancreas and in human pancreatic cancer tissues and cell lines. VEGF, flk-1/KDR and flt-1 mRNA levels were eleva...

Introduction Flt-3 mutations, which include the internal tandem duplications (ITD) and missense mutations at the D835 (aspartic acid) codon,2 are arguably the most common somatic mutations in acute myeloid leukemia (AML). As relapse remains the principal cause of treatment failure for the majority of AML patients, identification of patients with a high risk of relapse would be useful for the in...

The aim of the study was to evaluate the usefulness of 18F-FLT PET/CT in the detection and differentiation of gastric cancers (GC). 104 consecutive patients (57 cases of adenocarcinoma tubulare (G2 and G3), 17 cases of mucinous adenocarcinoma, 6 cases of undifferentiated carcinoma, 14 cases of adenocarcinoma partim mucocellulare, and 10 cases of end stage gastric cancer) with newly diagnosed ad...

The immune system is highly sensitive to stressors present during spaceflight. The major emphasis of this study was on the T lymphocytes in C57BL/6NTac mice after return from a 13-day space shuttle mission (STS-118). Spleens and thymuses from flight animals (FLT) and ground controls similarly housed in animal enclosure modules (AEM) were evaluated within 3-6 h after landing. Phytohemagglutinin-...

Cystic follicles have excess fluid derived from blood flow in the theca interna of the follicle; therefore, the vasculature network is related to cystic follicle formation. Vascular endothelial growth factor (VEGF) is a potent stimulator of blood vessel permeability and angiogenesis. The aim of this study was to examine the expression of VEGF receptors proteins and mRNA in cystic follicles to e...

OBJECTIVE This study evaluated the relative roles of the vascular endothelial growth factor (VEGF) receptors KDR and Flt-1 in the mediation of altered gene expression elicited by VEGF. METHODS AND RESULTS We used mutants of VEGF selective for the KDR and Flt-1 receptors to differentiate gene expression patterns mediated by wild-type VEGF (VEGFwt) in human umbilical vein endothelial cells. RNA...

Treatment of human monocytes with vascular endothelial growth factor (VEGF) isolated from tumor cell supernatants was reported to induce monocyte activation and migration. In this study we show that recombinant human VEGF165, and VEGF121 had a maximal effect on human monocyte migration at 65 to 250 pmol/L. Chemotactic activity of VEGF165 was inhibited by a specific antiserum against VEGF, by he...

The purpose of this study was to explore the feasibility of 18F-Fluorothymidine (18F-FLT) and 18F-Fluorodeoxyglucose (18F-FDG) positron emission tomography/computed tomography (PET/CT) in predicting treatment response of nasopharyngeal carcinoma (NPC). Patients with NPC of Stage II-IVB were prospectively enrolled, receiving 2 cycles of neoadjuvant chemotherapy (NACT), followed by concurrent che...