NK cell neoplasias

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Imaging Case: NK/T-Cell Lymphoma, Nasal Type

Peripheral T-cell lymphomas are a group of heterogeneous disorders and according to WHO classification, are categorized into nodal and extranodal forms. NK/T-cell lymphoma, nasal type, is a subtype of extranodal peripheral T-cell lymphoma and commonly presents as a midfacial destructive lesion. This disorder is more prevalent in Asia and South America and has a strong association with Epstein B...

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Modeling human endothelial cell transformation in vascular neoplasias

Endothelial cell (EC)-derived neoplasias range from benign hemangioma to aggressive metastatic angiosarcoma, which responds poorly to current treatments and has a very high mortality rate. The development of treatments that are more effective for these disorders will be expedited by insight into the processes that promote abnormal proliferation and malignant transformation of human ECs. The stu...

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NK cell-released exosomes

We have recently reported that human natural killer (NK) cells release exosomes that express both NK-cell markers and cytotoxic molecules. Similar results were obtained with circulating exosomes from human healthy donors. Both NK-cell derived and circulating exosomes exerted a full functional activity and killed both tumor and activated immune cells. These findings indicate that NK-cell derived...

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NK-cell fratricide

The intercellular transfer of plasma membrane patches, also known as trogocytosis, has a strong impact on the function and fate of immune cells. We have recently shown that natural killer (NK) cells undergo fratricide following the trogocytosis-mediated acquisition of tumor-derived NKG2D ligands. Malignant cells may therefore employ trogocytosis to escape NKG2D-mediated immune responses.

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NK Cell Exhaustion

Natural killer cells are important effector lymphocytes of the innate immune system, playing critical roles in antitumor and anti-infection host defense. Tumor progression or chronic infections, however, usually leads to exhaustion of NK cells, thus limiting the antitumor/infection potential of NK cells. In many tumors or chronic infections, multiple mechanisms might contribute to the exhaustio...

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ژورنال

عنوان ژورنال: Atlas of Genetics and Cytogenetics in Oncology and Haematology

سال: 2011

ISSN: 1768-3262

DOI: 10.4267/2042/38081