Oscar R Burrone

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Viroplasms are discrete structures formed in the cytoplasm of rotavirus-infected cells and constitute the replication machinery of the virus. The non-structural proteins NSP2 and NSP5 localize in viroplasms together with other viral proteins, including the polymerase VP1, VP3 and the main inner-core protein, VP2. NSP2 and NSP5 interact with each other,(More)
In rotavirus-infected cells, the non-structural proteins NSP5 and NSP2 localize in complexes called viroplasms, where replication and assembly occur. Recently, we have demonstrated direct interaction of NSP5 with NSP2, and as a consequence of that, up-regulation of NSP5 hyperphosphorylation. To investigate a possible structural role for the NSP2-NSP5(More)
A high prevalence of chronic hepatitis C virus (HCV) infection has recently been shown in a subset of B-cell non-Hodgkin's lymphomas, most of which belong to the lymphoplasmacytoid lymphoma/immunocytoma subtype and are characterized by the production of a monoclonal IgM cryoglobulin with rheumatoid factor activity. To better define the stage of(More)
NSP5 (non-structural protein 5) is one of two proteins encoded by genome segment 11 of group A rotaviruses. In virus-infected cells NSP5 accumulates in the virosomes and is found as two polypeptides with molecular masses of 26 and 28 kDa (26K and 28K proteins). NSP5 has been previously shown to be post-translationally modified by the addition of O-linked(More)
BACKGROUND Several authors have reported on the effectiveness of alpha-interferon (IFN-alpha) in the treatment of patients with mixed cryoglobulinemia. This prompted the authors to investigate the long term effects of this drug on clinical, hematologic, and virologic parameters in a group of 20 patients (13 women and 7 men) affected by mixed(More)
We recently demonstrated that a human recombinant scFv, L19, reacting with the ED-B domain of fibronectin, a marker of angiogenesis, selectively targets tumoral vasculature in vivo. Using the variable regions of L19, we constructed and expressed a human "small immunoprotein" (SIP) and a complete human IgG1 and performed biodistribution studies in(More)
CD57(+) expression in T lymphocytes has been recognized for decades as a marker of in vitro replicative senescence. In recent years, accumulating evidences have pointed on the utility of this marker to measure functional immune deficiency in patients with autoimmune disease, infectious diseases, and cancers. We review here the relevant literature and(More)
Improvement of the strategy to target tumor Ags to dendritic cells (DCs) for immunotherapy requires the identification of the most appropriate ligand/receptor pairing. We screened a library of Ab fragments on mouse DCs to isolate new potential Abs capable of inducing protective immune responses. The screening identified a high-affinity Ab against CD36, a(More)
We have designed and expressed bivalent small immune proteins (SIP) based on scFv fragments connected through a short linker of four amino acids to the CH3 domain of the human immunoglobulin gamma 1 H-chain. Three different versions have been designed and expressed in mammalian cells. In one construct a cysteine residue was included in the last amino acid(More)
Vaccination with immunogenic formulations of lymphoma-derived immunoglobulin can elicit strong anti-idiotypic immune responses which have proved effective in murine B cell tumor challenge experiments and suggested possible benefits in recent human clinical trials. Naked plasmid DNA vaccines encoding the Id determinants as scFv fragments provide the most(More)