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Page 1 de 161 résultats
Growth stimulation of rous sarcoma virus-transformed BHK cells by biotin and serum lipids.
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Biotin or a serum lipid extract stimulated proliferation of G1 arrested Rous sarcoma virus-transformed BHK cells in modified Eagle's MEM (BM). The cells could be maintained continuously in BM plus biotin (BMB), but not in BM plus serum lipid extract (BM X L). Avidin inhibited growth stimulation when
Synovial sarcoma: ultrastructural study and immunohistochemical analysis by a combined peroxidase-antiperoxidase/avidin-biotin-peroxidase complex procedure.
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To analyze the purportedly epithelial features of synovial sarcoma, the antigenic profiles of 20 of these neoplasms (including 12 of the monophasic type) were studied by three different immunohistochemical techniques, and the results were correlated with ultrastructural observations in 10 cases. All
Orbital granulocytic sarcoma.
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OBJECTIVE
Orbital granulocytic sarcoma is a localised tumour composed of cells of myeloid origin. Histological diagnosis can be difficult in patients with poorly differentiated orbital tumours and no evidence of systemic leukaemia. The naphthol AS-D chloracetate esterase (Leder stain) and
Regulation of tumor necrosis factor-like weak inducer of apoptosis receptor protein (TWEAKR) expression by Kaposi's sarcoma-associated herpesvirus microRNA prevents TWEAK-induced apoptosis and inflammatory cytokine expression.
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Kaposi's sarcoma (KS)-associated herpesvirus (KSHV) is the causative agent of KS, the second most common AIDS-associated malignancy. KSHV expresses at least 18 different mature microRNAs (miRNAs) during latency. To identify cellular targets of KSHV miRNAs, we have analyzed a previously reported
Immunohistochemical detection of HER-2/neu, c-kit (CD117) and vascular endothelial growth factor (VEGF) overexpression in soft tissue sarcomas.
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OBJECTIVE
The aim of this study was to determine the incidence of HER-2/neu, VEGF and CD117 overexpression in soft tissue sarcomas (STS) and to study the effect of this overexpression, if present, on survival in patients with specific histological subtypes of STS.
METHODS
We conducted a
Biotin-dependent carboxylase activities in different CNS and skin-derived cells, and their sensitivity to biotin-depletion.
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The validity of various transformed and untransformed CNS and skin-derived cell cultures as a model for studying effects of biotin deficiency was tested. In biotin-sufficient conditions (0.1-10 mumol/L) all cell types showed considerable activities of the four biotin-dependent carboxylases. Notably,
Rapid tumor imaging by active background reduction using biotin-bearing liposomes and avidin.
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Tumor imaging with labeled liposomes is slow; although they reach the tumor quickly, their blood clearance is slow, and the high blood background hinders early imaging. We have developed a rapid tumor imaging technique based on the active removal of liposomes from the circulation by using the
CD1a immunopositivity in perivascular epithelioid cell neoplasms: true expression or technical artifact? A streptavidin-biotin and polymer-based detection system immunohistochemical study of perivascular epithelioid cell neoplasms and their morphologic mimics.
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Perivascular epithelioid cell neoplasms comprise a family of rare neoplasms composed of morphologically distinctive perivascular epithelioid cells exhibiting a "myomelanocytic" immunophenotype. The distinction of perivascular epithelioid cell neoplasms from other tumors with melanocytic and smooth
Growth and G1 arrest of sarcoma virus trnasformed cells in serum free media.
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Rous-sarcoma transformed BHK cells can be continuously cultured in a medium containing Eagle's Minimal Essential Medium, iron and biotin. The rate of cell multiplication increased when serine, or serine plus other non-essential amino-acids were added to the medium. With biotin deleted from the
In situ hybridization analysis of cytomegalovirus lytic infection in Kaposi's sarcoma associated with AIDS. A study of 14 autopsy cases.
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Cytomegalovirus (CMV) was assayed by in situ hybridization with commercially available biotin-labeled CMV-DNA probes in 45 formalin-fixed paraffin-embedded autopsy specimens with Kaposi's sarcoma from 14 cases of the acquired immune deficiency syndrome (AIDS). In seven of the 14 cases, a few
Cytomegalovirus in intraoral Kaposi's sarcoma.
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Intraoral Kaposi's sarcomas from five patients with AIDS were examined for the presence of cytomegalovirus (CMV) DNA by in situ hybridization using a biotin-labeled CMV DNA probe and by Southern blot analysis. CMV DNA was detected in two of the five intraoral Kaposi's sarcomas. The CMV DNA was
Localization of alpha 2-macroglobulin in human primary sarcomas and synthesis in established cell lines.
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The presence of alpha 2-macroglobulin (alpha 2M) was detected with the avidin-biotin technique in more than 20-yr-old paraffin blocks from human sarcomas. alpha 2M was found mainly in the cytoplasm of the tumor cells, and almost all tumor cells were positive. This serum glycoprotein, which is a
Intermediate-sized filament proteins (keratin, vimentin, desmin) in metaplastic carcinomas, carcinosarcomas and stromal sarcomas of the breast.
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The distribution of intermediate-filament (IF) proteins of the keratin, vimentin and desmin type in breast stromal sarcomas, carcinosarcomas, metaplastic carcinomas and phyllodes tumors has been compared using the avidin-biotin complex immunoperoxidase technique. Keratin reactivity was found in
Evaluation of formalin-fixed paraffin-embedded tissues from vaccine site-associated sarcomas of cats for polyomavirus DNA and antigen.
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OBJECTIVE
To determine whether vaccine site-associated sarcomas (VSS) from cats contain polyomavirus antigen or DNA.
METHODS
50 formalin-fixed paraffin-embedded tissue blocks of VSS from cats.
METHODS
Sections from each tissue block were evaluated for polyomavirus antigen by use of an
Evaluation of formalin-fixed paraffin-embedded tissues from vaccine site-associated sarcomas of cats for papillomavirus DNA and antigen.
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OBJECTIVE
To determine whether vaccine site-associated sarcomas (VSS) from cats contain papillomavirus antigen or DNA.
METHODS
50 formalin-fixed paraffin-embedded tissue blocks of VSS from cats.
METHODS
Sections from each tissue block were evaluated for papillomavirus antigen by use of an
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