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Histochemical analysis of frozen, thin sections revealed the distribution of alkaline phosphatase (ALPase) in 47 primary intracranial neoplasms in humans. The cytoplasm of meningioma cells exhibited the strongest ALPase reactivity. Pretreatment of these materials by levamisol indicated that the
A case of malignant schwannoma of the sciatic nerve is described associated with hepatic dysfunction in the absence of hepatic metastases. An elevated serum alkaline phosphatase activity was present with an isoenzyme pattern indicating hepatic involvement. These abnormalities disappeared after
Exposure of trigeminal neurinoma 476-16 cells to C2-ceramide in a serum-deprived medium induces cell rounding followed by cell death characterized by cytoplasmic shrinkage and nuclear condensation. The induction of cell rounding and death occurs in proliferating cells but not in essentially
Background: High-grade glioma is the most pervasive and lethal of all brain malignancies. Despite advances in imaging technologies, discriminating between gliomas and other brain diseases such as multiple sclerosis (MS) often requires
OCT4 is an 18-kDa POU-domain transcription factor encoded by the POU5F1 gene. Also known as OCT3, OTF3, and POU5F1, OCT4 is involved in the initiation, maintenance, and differentiation of pluripotent and germline cells during normal development. It is expressed in mouse and human embryonic stem and
Transplantable tumor (KE) and clone cell (KE-F11) lines were established from a spontaneous malignant schwannoma found in an aged F344 rat. The primary tumor and KE tumors consisted of oval or spindle cells arranged in ill-defined bundles. Cultured KE-F11 cells exhibited polygonal or spindle
OBJECTIVE
To report the first case of choroidal schwannoma in a patient affected by PTEN hamartoma tumor syndrome (PHTS) and investigate the molecular involvement of the phosphatase and tensin homolog (PTEN) and neurofibromin 2 (NF2) genes in this rare intraocular tumor.
METHODS
Observational case
OBJECTIVE
Provide an overview of the literature on vestibular schwannoma biology with special attention to tumor behavior and targeted therapy.
BACKGROUND
Vestibular schwannomas are benign tumors originating from the eighth cranial nerve and arise due to inactivation of the NF2 gene and its product
Merlin is a tumour suppressor involved in the development of a variety of tumours including mesotheliomas. Neurofibromatosis type 2 (NF2), a dominantly inherited tumour disease, is also caused by loss of merlin. NF2 patients suffer from multiple genetically well-defined tumours, schwannomas are most
OBJECTIVE
Elevated levels of hsa-microRNA-21 (miR-21) in vestibular schwannomas (VSs) may contribute to tumor growth by downregulating the tumor suppressor phosphatase and tensin homolog (PTEN) and consequent hyperactivation of protein kinase B (AKT), a key signaling protein in the cellular pathways
OBJECTIVE
The neurofibromatosis 2 gene, which encodes the tumor suppressor protein merlin, is frequently mutated in vestibular schwannomas (VS). Merlin can inhibit phosphatidylinositol 3 kinase (PI3 kinase) by binding to PI3 kinase enhancer long isoform. Therefore, we hypothesized that the PI3
The use of radiation treatment has increased for both sporadic and neurofibromatosis type 2 (NF2)-associated vestibular schwannoma (VS). However, there are a subset of radioresistant tumors and systemic treatments that are seldom used in these patients. We investigated molecular alterations after
Objectives: Autoantibodies (AAb) and donor-specific HLA antibodies (DSA) are frequently present in pediatric liver transplant (LT) recipients. Their clinical significance remains incompletely understood. We aimed to investigate the
The activity of the ZnTP (Felicetti und Rath 1975; Rath and Felicetti 1975) was investigated histo- and biochemically in neurinomas of trigeminal nerves of rats. The tumors were induced by a single transplacental pulse of 30 mg ENU/kg on the 17th day of gestation. The rats were killed at the age of