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Fibrosis results from inflammatory tissue damage and impaired regeneration. In the context of bleomycin-induced pulmonary fibrosis, we demonstrated that the matricellular protein termed secreted protein acidic and rich in cysteine (SPARC) distinctly regulates inflammation and collagen deposition, depending on its cellular origin. Reciprocal Sparc(-/-) and(More)
PURPOSE Exosomes deliver signals to target cells and could thus be exploited as an innovative therapeutic tool. We investigated the ability of membrane TRAIL-armed exosomes to deliver proapoptotic signals to cancer cells and mediate growth inhibition in different tumor models. EXPERIMENTAL METHODS AND RESULTS K562 cells, transduced with lentiviral human(More)
A live attenuated AroA- auxotrophic mutant of Salmonella typhimurium (SL7207) has been used as carrier for the pCMVbeta vector that contains the beta-galactosidase (beta-gal) gene under the control of the immediate early promoter of Cytomegalovirus (CMV). We tested whether orally administered bacterial carrier could enter and deliver the transgene to(More)
Listeria monocytogenes has been proposed as a carrier to elicit major histocompatibility complex class-I restricted immune responses able to protect against tumor challenge. In this study the properties of the attenuated L. monocytogenes delta mp12 mutant has been evaluated in vivo against a highly aggressive mouse fibrosarcoma which expresses(More)
We have compared the therapeutic activity and characterized the antitumor response induced by IL-12 and IL-2 gene-transduced tumor cell vaccines. Mice bearing lung metastases of the BALB/c colon carcinoma C51 were treated with syngenic, histologically related, and antigenically cross-reacting irradiated IL-12 (C26/IL12) or IL-2 (C26/IL2) gene-transduced C26(More)
Tumor immunotherapy has exploited the ability of heat shock proteins to chaperone precursors of antigenic peptides to antigen-presenting cells and to activate efficiently an immune response against tumor-associated antigens. The most common strategy is based on the purification of heat shock protein-peptide complexes from tumor cell lines or from tumor(More)
Intra-tumor injection of immunotherapeutic agents is often the most effective, likely because of concomitant modification of tumor microenvironment. We tested an immunotherapeutic regimen consisting of CpG oligonucleotides and of adenovirus-mediated gene delivery of CCL16 chemokine directly into orthotopically implanted prostate tumors by ultrasound-guided(More)
We evaluated whether antibody response correlates with tumor therapy by cytokine gene-modified tumor cell vaccines. To characterize the antibody (Ab) response against a known antigen, colon carcinoma C26 cells and C26 variants engineered to produce interleukin (IL) 12 or IL-4 were further transduced to express the human tumor-associated antigen gp38 folate(More)
Vaccinations with tumor cells engineered to produce IL-4 prolonged survival and cured 30% of mice bearing pulmonary metastases, an effect abrogated by in vivo depletion of T cells. Vaccination induced type 2 T cell polarization in both CD4 and CD8 T lymphocyte subsets. We focused on the antitumor activity exerted by type 2 CD8+ T cells (Tc2) activated by(More)
The virus-induced BALB/c lymphoma YC8 is known to be lysed in vitro by syngeneic lymphoid cells immune to non-H-2 antigens of B10.D2 and DBA/2 backgrounds. This tumor is weakly immunogenic in vivo and kills 100% of syngeneic mice with 1 X 10(3) cells given either intravenously (i.v.) or intraperitoneally (i.p.). We show here that i.v.-injected YC8 cells(More)