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[Changes in the structure of fibronectin glycans caused by the transformation of BHK21/C13 cells induced by hamster sarcoma viruses. Hypothesis concerning metastatic diffusion by masking lectin sites of fibronectin].
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Transformation of BHK21/C13 cells by the hamster sarcoma virus induces dramatic modifications of glycans of the N-acetyllactosaminic type from fibronectin secreted in the culture medium. In fact, the ratio tri + tetraantennary glycans/biantennary glycans increases from 0.73 to 2.46. Moreover, the
Distinct N-glycan glycosylation of P-glycoprotein isolated from the human uterine sarcoma cell line MES-SA/Dx5.
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The uterine sarcoma human cell line MES-SA/Dx5 overexpresses the MDR1 gene product, P-glycoprotein (Pgp). Pgp is a heavily glycosylated, ATP-dependent drug efflux pump expressed in many human cancers. There are more than 150 known isoforms of Pgp, which complicates the characterization of Pgp
Complex N-linked glycans on Asn-89 of Kaposi sarcoma herpes virus-encoded interleukin-6 mediate optimal function by affecting cytokine protein conformation.
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Kaposi sarcoma-associated herpesvirus-encoded interleukin-6 (vIL-6) and its human cellular homologue (huIL-6) share similar biological functions. Our previous work showed that N-linked glycosylation was required for optimal function of vIL6 but not huIL-6 (1). Here we describe heterogeneity in the
Disrupting galectin-1 interactions with N-glycans suppresses hypoxia-driven angiogenesis and tumorigenesis in Kaposi's sarcoma.
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Kaposi's sarcoma (KS), a multifocal vascular neoplasm linked to human herpesvirus-8 (HHV-8/KS-associated herpesvirus [KSHV]) infection, is the most common AIDS-associated malignancy. Clinical management of KS has proven to be challenging because of its prevalence in immunosuppressed patients and its
In-vivo and in-vitro targeting of a murine sarcoma by gelatin microparticles loaded with a glycan (PS1).
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PS1, a complex polysaccharide derived from Mycobacterium bovis (Bacillus Calmette-Guérin, BCG) with considerable antitumor activity in-vivo, was loaded onto gelatin microparticles (mean diam. 1.45 micron) at a level shown to not produce the burst effect often seen with drug-loaded microparticulate
Glycoprotein modifications of sarcoma L-1 tumor cells by tunicamycin, swainsonine, bromoconduritol or 1-desoxynojirimycin treatment inhibits their metastatic lung colonization in Balb/c-mice.
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Synthesis and expression of cell surface carbohydrates appear to be involved in recognition events associated with tumor invasion and metastasis. Thus, the potential of murine sarcoma L-1 cells to form experimental lung metastases after i.v. injection was assessed after inhibiting tumor cell protein
Glycans with Antiviral Activity from Marine Organisms.
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There remains today a critical need for new antiviral agents, particularly in view of the alarming increase in drug resistance and associated issues. The marine environment has been a prolific contributor towards the identification of novel therapeutic agents in the recent few decades. Added to
Antitumor active protein-containing glycans from the Chinese mushroom songshan lingzhi, Ganoderma tsugae mycelium.
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A water-soluble polysaccharide, FI, extracted from the mycelium of Granoderma tsugae, was fractionated and purified by ion-exchange chromatography, gel filtration, and affinity chromatography. Sixteen polysaccharides obtained were examined for antitumor effects on Sarcoma 180 in mice. The three
Antineoplastic activity of BCG: location of antineoplastic glycans in the cellular integument of Mycobacterium bovis, BCG vaccine, Connaught substrain.
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The polysaccharidic integument surrounding growing cells of attenuated Mycobacterium bovis Bacillus Calmette-Guérin (BCG) vaccine, Connaught substrain, can be removed with non-specific proteases. After 5 weeks incubation at 37 degrees C in Middlebrook 7H-9 medium, the collected cells were incubated
Participation of Somatic Stem Cells, Labeled by a Unique Antibody (A3) Recognizing Both N-glycan and Peptide, to Hair Follicle Cycle and Cutaneous Wound Healing in Rats
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A monoclonal antibody (A3) was generated by using rat malignant fibrous histiocytoma (MFH) cells as the antigen. Generally, MFH is considered to be a sarcoma derived from undifferentiated mesenchymal cells. Molecular biological analyses using the lysate of rat MFH cells revealed that A3 is a
Altered glycosylation in Madin-Darby canine kidney (MDCK) cells after transformation by murine sarcoma virus.
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The changes in glycosylation of an immortalized epithelial cell line (MDCK) before and after progression towards a more malignant phenotype have been studied. The parental MDCK-3 cells were immortalized after long-term passage in vitro and have shown no tendency for spontaneous acquisition of
Kaposi's sarcoma-associated herpesvirus-encoded viral interleukin-6 is secreted and modified differently than human interleukin-6: evidence for a unique autocrine signaling mechanism.
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Viral interleukin-6 (vIL-6) is a homolog of cellular IL-6 that is encoded by the Kaposi's sarcoma-associated herpesvirus (KSHV) genome. vIL-6 binds to the IL-6 signal transducer gp130 without the cooperation of the IL-6 high affinity receptor to induce STAT3 DNA binding and cell proliferation.
Molecular signatures of tumor progression in myxoid liposarcoma identified by N-glycan mass spectrometry imaging.
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Myxoid liposarcoma (MLS) is the second most common subtype of liposarcoma, accounting for ~6% of all sarcomas. MLS is characterized by a pathognomonic FUS-DDIT3, or rarely EWSR1-DDIT3, gene fusion. The presence of ≥5% hypercellular round cell areas is associated with a worse prognosis for the
Chondroitin sulfate synthase 1 expression is associated with malignant potential of soft tissue sarcomas with myxoid substance.
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The glycosyltransferases chondroitin sulfate synthase 1 (CHSY1) and exostoses-like 3 (EXTL3) specifically function in biosynthesis of the glycans chondroitin sulfate and heparan sulfate, respectively. Although these glycans play important roles in pathogenesis of various tumors, their significance
An anti-neoplastic glycan isolated from Mycobacterium bovis (BCG vaccine).
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Tice substrain BCG is used clinically as an immunotherapeutic agent against superficial bladder cancer. A boiling-water extract of this BCG showed anti-tumour activity against a murine S180 sarcoma model and was fractionated into three fractions, A, B and C, by the use of Sephadex LH-20
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