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Strana 1 od 38 výsledky
O-(2-[18F]fluorethyl)-L-tyrosine PET in the clinical evaluation of primary brain tumours.
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OBJECTIVE
The aim of this study was to evaluate the differential uptake of O-(2-[18F]fluorethyl)-L-tyrosine (FET) in suspected primary brain tumours.
METHODS
Positron emission tomography (PET) was performed in 44 patients referred for the evaluation of a suspected brain tumour. Acquisition consisted
Reducing glypican-4 in ES cells improves recovery in a rat model of Parkinson's disease by increasing the production of dopaminergic neurons and decreasing teratoma formation.
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The heparan sulfate proteoglycan Glypican 4 (Gpc4) is strongly expressed in mouse embryonic stem (ES) cells where it controls the maintenance of self-renewal by modulating Wnt/β-catenin signaling activities. Here we show that mouse ES cells carrying a hypomorphic Gpc4 allele, in a single-step
Neurochemical studies in a mouse teratoma with neuroepithelial differentiation. Presence of cyclic AMP, serotonin and enzymes of the serotonergic, adrenergic and cholinergic systems.
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A transplantable mouse testicular teratoma (OTT 6050) which displays a spectrum of neuroepithelial differentiation was evaluated biochemically for concentrations of cyclic AMP (cAMP), serotonin (5-HT), and enzymes involved in the metabolism of the biogenic amines and acetylcholine. These values were
Docosahexaenoic acid promotes dopaminergic differentiation in induced pluripotent stem cells and inhibits teratoma formation in rats with Parkinson-like pathology.
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Parkinson's disease (PD) is a neurodegenerative disorder characterized by the degeneration of dopaminergic (DA) neurons in the midbrain. Induced pluripotent stem (iPS) cells have shown potential for differentiation and may become a resource of functional neurons for the treatment of PD. However,
Congenital sacrococcygeal teratomas: effect of gestational age on size, morphologic pattern, ploidy, p53, and ret expression.
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Prognosis of infants born with sacrococcygeal teratomas (SCTs) correlates with gestational age (GA). The survival rate after 30 weeks of gestation is 75%, compared to 7% before 30 weeks of gestation. Studies correlating GA with size, morphologic composition of teratomas, ploidy or expression of cell
K-sam gene encodes secreted as well as transmembrane receptor tyrosine kinase.
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K-sam was first identified as a gene amplified in the stomach cancer cell line KATO-III. The size of the major transcript of the K-sam gene was 3.5 kilobases in KATO-III cells, and we have previously shown that K-sam encodes a receptor tyrosine kinase that belongs to the heparin-binding growth
Selection of embryonic stem cell-derived enhanced green fluorescent protein-positive dopamine neurons using the tyrosine hydroxylase promoter is confounded by reporter gene expression in immature cell populations.
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Transplantation of mouse embryonic stem (mES) cells can restore function in Parkinson disease models, but can generate teratomas. Purification of dopamine neurons derived from embryonic stem cells by fluorescence-activated cell sorting (FACS) could provide a functional cell population for
Embryonic stem cell tumor model reveals role of vascular endothelial receptor tyrosine phosphatase in regulating Tie2 pathway in tumor angiogenesis.
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Inhibiting angiogenesis has become an effective approach for treating cancer and other diseases. However, our understanding of signaling pathways in tumor angiogenesis has been limited by the embryonic lethality of many gene knockouts. To overcome this limitation, we used the plasticity of embryonic
Pluripotency of reprogrammed somatic genomes in embryonic stem hybrid cells.
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Somatic nuclei can be epigenetically reprogrammed by factors present in undifferentiated embryonic stem (ES) cells. The acquisition of pluripotency by somatic genomes could render such cells a viable source of personalized cell type(s) for therapeutic application, avoiding the need for controversial
HPV induced ovarian squamous cell carcinoma: case report and review of the literature.
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BACKGROUND
Ovarian squamous cell carcinoma is usually derived from a teratoma, a Brenner tumour or endometriosis. Association with an HPV infection is rare.
METHODS
A fourth case of ovarian squamous cell cancer associated with HR-HPV is presented. Debulking for stage IIIc ovarian squamous cell
Platelet-derived growth factor receptor-beta constitutive activity promotes angiogenesis in vivo and in vitro.
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OBJECTIVE
Knockout studies have demonstrated crucial roles for the platelet-derived growth factor-B and its cognate receptor, platelet-derived growth factor receptor-beta (PDGFR-beta), in blood vessel maturation, that is, the coverage of newly formed vessels with mural cells/pericytes. This study
Repression of cyclin D1 as a target for germ cell tumors.
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Metastatic germ cell tumors (GCT) are curable, however GCTs refractory to cisplatin-based chemotherapy have a poor prognosis. This study explores D-type cyclins as molecular targets in GCTs because all-trans-retinoic acid (RA)-mediated differentiation of the human embryonal carcinoma (EC) cell line
Absence of c-KIT and members of the epidermal growth factor receptor family in refractory germ cell cancer.
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BACKGROUND
Germ cell tumors (GCTs) in adolescent and young males are very sensitive to cisplatin-based chemotherapy. However, 10-20% of the patients cannot be cured by currently available therapeutic options. Once a tumor does not respond to cisplatin, current therapeutic modalities offer only a
[New therapeutic targets in testicular cancer: contribution of molecular biology].
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Testicular cancer is curable by conventional cytotoxic drugs. Despite these excellent results, a group of patients remain incurable with standard chemotherapy, including patients who progress despite high-dose salvage chemotherapy, patients with malignant transformation of teratomas and patients
Fibroblast growth factor receptor-1 expression is required for hematopoietic but not endothelial cell development.
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OBJECTIVE
The purpose of this study was to clarify the role of fibroblast growth factors (FGFs) and FGF receptors (FGFRs) in hematopoietic/endothelial development.
RESULTS
Using several different FGFR-1-specific antibodies and FGFR-1 promoter-driven LacZ activity, we show that FGFR-1 is expressed
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