Cathepsin L
Mostrando 13-24 de 121 artigos, teses e dissertações.
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13. Search of natural products as specific inhibitors of enzymes / Busca de produtos naturais como inibidores específicos de enzimas
The present work describes the search of bioactive secondary metabolites isolated from plants, against enzymes: gGAPDH (glyceraldehydes-3- phosphate dehydrogenase from Trypanosoma cruzi and lysosomal cathepsins K, V, L and S. This work is divided in two parts: Part I: Study of the oil from the nut shells of Anacardium occidentale (Anacardiaceae) - Chagas dis
Publicado em: 2008
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14. Produção recombinante e estudos funcionais de três novas cistatinas da cana-de-açúcar e sua utilização em estudos de inibição da adesão, proliferação, migração e invasão celular
ABSTRACT Tumor metastasis is usually a major cause of death among cancer patients. Degradation and invasion of the extracellular matrix and basement membrane, key steps in the metastatic process, rely on the activity of proteolytic enzymes. The levels and activities of cathepsins B and L are considerably increased in cancer cells, and have been related to th
Publicado em: 2008
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15. Intestinal molecular physiology of Dysdercus peruvianus (Hemiptera) / Fisiologia molecular intestinal de Dysdercus Peruvianus (Hemiptera)
After identification of cathepsins L in vitro assays and in zimograms we began to purify this enzyme in insect midgut. The region V2 was selected as a source of material for purifying a cysteine proteinase because it contains most of the activity of that proteinase. After several attempts to purify this proteinase, an effective process was developed that avo
Publicado em: 2008
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16. Efeitos da pró-renina humana em cardiomiócitos de ratos neonatos e seu processamento pela catepsina B humana em céluklas GH4CI / Efeitos da pró-renina humana em cardiomiócitos de ratos neonatos e seu processamento pela catepsina B humana em céluklas GH4CI
A renina é uma aspartil protease sintetizada in vivo pela remoção proteolítica do prósegmento amino-terminal de seu precursor, a pró-renina. A catepsina B, uma tiol protease, tem sido sugerida como candidata à enzima conversora de pró-renina devido à sua colocalização com a renina nos grânulos secretórios e também pela sua capacidade de process
Publicado em: 2008
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17. Avaliação do efeito citotóxico da lectina da esponja marinha Cliona varians contra células de leucemia mielóide crônica
In this study, a BCR-ABL expressing human chronic myelogenous leukaemia cell line (K562) was used to investigate the antitumoral potential of a novel lectin (CvL) purified from the marine sponge Cliona varians. CvL inhibited the growth of K562 cells with an IC50 value of 70 g/ml, but was ineffective to normal human peripheral blood lymphocytes in the same ra
Publicado em: 2007
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18. Characterization of the cathepsin-like cysteine proteinases of Schistosoma mansoni.
Adult Schistosoma mansoni parasites synthesize and secrete both cathepsin L and cathepsin B cysteine proteinases. These cysteine proteinase activities, believed to be involved in hemoglobin digestion by adult schistosomes, were characterized by using specific fluorogenic peptide substrates and zymography. Both cathepsin L- and B-like activities with pH optim
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19. Induction of protective immunity in cattle against infection with Fasciola hepatica by vaccination with cathepsin L proteinases and with hemoglobin.
Two cathepsin L proteinases, cathepsin L1 and cathepsin L2, secreted by liver flukes may be involved in tissue penetration, nutrition, and protection from immune attack. To ascertain the immunoprophylactic potential of these proteinases, and of another molecule, liver fluke hemoglobin (Hb), we performed vaccine trials in cattle. In the first vaccine trial va
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20. Thyroid functions of mouse cathepsins B, K, and L
Thyroid function depends on processing of the prohormone thyroglobulin by sequential proteolytic events. From in vitro analysis it is known that cysteine proteinases mediate proteolytic processing of thyroglobulin. Here, we have analyzed mice with deficiencies in cathepsins B, K, L, B and K, or K and L in order to investigate which of the cysteine proteinase
American Society for Clinical Investigation.
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21. Cathepsin L in secretory vesicles functions as a prohormone-processing enzyme for production of the enkephalin peptide neurotransmitter
Multistep proteolytic mechanisms are essential for converting proprotein precursors into active peptide neurotransmitters and hormones. Cysteine proteases have been implicated in the processing of proenkephalin and other neuropeptide precursors. Although the papain family of cysteine proteases has been considered the primary proteases of the lysosomal de
National Academy of Sciences.
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22. Uptake of extracellular enzyme by a novel pathway is a major determinant of cathepsin L levels in human macrophages.
The phorbol myristate acetate (PMA)-differentiated myelomonocytic cell line, THP-1, and human alveolar macrophages contain the cysteine proteinase cathepsin L. This enzyme is synthesized as a 43-kD proenzyme and processed to the active 25-kD form. Differentiation of THP-1 cells in the presence of human serum resulted in an increase in the size of the vacuola
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23. Inhibitors of cathepsin L prevent severe acute respiratory syndrome coronavirus entry
Severe acute respiratory syndrome (SARS) is caused by an emergent coronavirus (SARS-CoV), for which there is currently no effective treatment. SARS-CoV mediates receptor binding and entry by its spike (S) glycoprotein, and infection is sensitive to lysosomotropic agents that perturb endosomal pH. We demonstrate here that the lysosomotropic-agent-mediated blo
National Academy of Sciences.
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24. Alterations in cysteine proteinase content of rat lung associated with development of Pneumocystis carinii infection.
The rate of hydrolysis of three cysteine-type proteinase substrates, N-benzyloxycarbonyl-Arg-Arg-4-methyl-7-coumarylamide (AMC) (cathepsin B), Arg-AMC (cathepsin H), and N-benzyloxycarbonyl-Phe-Arg-AMC (cathepsin L), were determined in rat lung throughout the time course of the induction of Pneumocystis carinii infection by immunosuppression. Cathepsin B-lik