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Página 1 desde 31 resultados
Serine protease inhibitor Kazal type 1 promotes proliferation of pancreatic cancer cells through the epidermal growth factor receptor.
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Serine protease inhibitor, Kazal type 1 (SPINK1) is expressed not only in normal human pancreatic acinar cells but also in a variety of pancreatic ductal neoplasms. There are structural similarities between SPINK1 and epidermal growth factor (EGF). Hence, we hypothesized that SPINK1 binds to EGF
Pan‑cancer analysis of transmembrane protease serine 2 and cathepsin L that mediate cellular SARS‑CoV‑2 infection leading to COVID-19
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Severe acute respiratory syndrome (SARS) coronavirus‑2 (SARS‑CoV2) is the cause of a new disease (COVID‑19) which has evolved into a pandemic during the first half of 2020. Older age, male sex and certain underlying diseases, including cancer, appear to significantly increase the risk for severe
Ets-1 gene expression in patients with thymoma.
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OBJECTIVE
The Ets-1 protooncogene transcription factor is involved in several cellular functions, including the activation of several proteases, and reportedly plays an important role in carcinoma invasion and metastasis. We hypothesize that Ets-1 mRNA expression could be a predictor of thymoma
Proteolytic degradation of protein kinase C in the phorbol ester-induced interleukin-2 secreting thymoma cells.
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Effects of phorbol 12-myristate 13-acetate (PMA) on the fate of protein kinase C in two mouse thymoma cell lines, which are either responsive (EL4) or unresponsive (IEL4) to PMA-induced interleukin-2 (IL-2) production, were investigated with polyclonal antibodies raised against rat brain enzyme.
Stabilization of thymic glucocorticoid-receptor complexes by the calcium-activated protease inhibitor, calpastatin.
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We previously described a heat-stable factor from WEHI-7 mouse thymoma, rat liver, spleen, and human chronic lymphocytic leukemia cells that prevents degradation of glucocorticoid-receptor complexes (GRC) in cytosols from rat thymus and acute non-lymphocytic leukemia cells. We now show that the
Alternatively spliced transcripts of the thymus-specific protease PRSS16 are differentially expressed in human thymus.
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The putative serine protease PRSS16 is abundantly expressed in the thymic cortex and the gene is encoded within the HLA I complex. Although its function is not yet defined, the very restricted expression points to a role in T-cell development in the thymus. In this study, we show that the PRSS16
Involvement of a calpain-like protease in the processing of the murine interleukin 1 alpha precursor.
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Interleukin (IL) 1 alpha is synthesized as a 33-kDa precursor that is enzymatically cleaved to the 15-17-kDa forms that are found in the culture supernatants of activated macrophages. We have explored the possibility that calcium might enhance IL-1 processing and secretion via the stimulation of a
Antitumor effect of the human immunodeficiency virus protease inhibitor ritonavir: induction of tumor-cell apoptosis associated with perturbation of proteasomal proteolysis.
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Ritonavir is an HIV protease inhibitor used in the therapy of HIV infection. Ritonavir has also been shown to inhibit the chymotrypsin-like activity of isolated 20S proteasomes. Here, we demonstrate that ritonavir, like classical proteasome inhibitors, has antitumoral activities. In vitro, ritonavir
β-catenin activation drives thymoma initiation and progression in mice.
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Thymoma is the most commonly identified cancer in the anterior mediastinum. To date, the causal mechanism that drives thymoma progression is not clear. Here, we generated K5-âN64Ctnnb1/ERT2 transgenic mice, which express an N-terminal deletion mutant of β-catenin fused to a mutated ligand-binding
A mechanistic target of rapamycin complex 1/2 (mTORC1)/V-Akt murine thymoma viral oncogene homolog 1 (AKT1)/cathepsin H axis controls filaggrin expression and processing in skin, a novel mechanism for skin barrier disruption in patients with atopic dermatitis.
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BACKGROUND
Filaggrin, which is encoded by the filaggrin gene (FLG), is an important component of the skin's barrier to the external environment, and genetic defects in FLG strongly associate with atopic dermatitis (AD). However, not all patients with AD have FLG mutations.
OBJECTIVE
We hypothesized
Purification of three cytotoxic lymphocyte granule serine proteases that induce apoptosis through distinct substrate and target cell interactions.
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We recently reported the purification of a lymphocyte granule protein called "fragmentin," which was identified as a serine protease with the ability to induce oligonucleosomal DNA fragmentation and apoptosis (Shi, L., R. P. Kraut, R. Aebersold, and A. H. Greenberg. 1992. J. Exp. Med. 175:553). We
Giant cell polymyositis and myocarditis associated with myasthenia gravis and thymoma.
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We describe an unusual case of myasthenia gravis. Our patient had been diagnosed as having myasthenia gravis with thymoma at the age of 64 years, and died of acute respiratory failure at the age of 80 years. Post mortem examination revealed CD8-positive lymphocytic infiltration with numerous giant
Shedding of epithin/PRSS14 is induced by TGF-β and mediated by tumor necrosis factor-α converting enzyme.
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Epithin/PRSS14, a type II transmembrane serine protease, plays critical roles in cancer metastasis. Previously, we have reported that epithin/PRSS14 undergoes ectodomain shedding in response to phorbol myristate acetate (PMA) stimulation. In this study, we show that transforming growth factor-β
Migration stimulation factor (MStF), from murine B cells, constitutively produced by a T-B hybridoma.
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Hybridomas were established between murine spleen B cells and the thymoma cell line BW5147, to purify the migration stimulation factor (MStF), a molecule likely involved in immunosuppression. The parental B cells were from Lo/PHA mice previously shown to produce high levels of MStF after
Remodelling of the S3 PA700 proteasome activator gene chromatin structure during thymocyte differentiation.
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The proteasome is the major cytosolic protease, composed of a 20S catalytic core that associates with either the 19S (PA700) activator or the 11S (PA28) regulator complex. The 19S complex is thought to promote protein substrate unfolding and subsequent degradation, but precise functions for the
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