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Página 1 a partir de 147 resultados
Lysozyme, a major low-molecular-weight cationic protein of the intervertebral disc, which increases with ageing and degeneration.
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Lysozyme was demonstrated to increase in content in the human intervertebral disc in a significant age-dependent manner. In young discs (less than 20 years) the levels were 440 U/g wet weight, whereas in older discs (greater than 65 years) the concentration was 3,460 U/g wet weight. These findings
Rates of ubiquitin conjugation increase when muscles atrophy, largely through activation of the N-end rule pathway.
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The rapid loss of muscle mass that accompanies many disease states, such as cancer or sepsis, is primarily a result of increased protein breakdown in muscle, and several observations have suggested an activation of the ubiquitin-proteasome system. Accordingly, in extracts of atrophying muscles from
Isolation and characterization of the lysozyme-encoding gene from the silkworm Bombyx mori.
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We have isolated and characterized a Bombyx mori (Bm) cDNA encoding a lysozyme (Lyz). A 90-bp DNA fragment was amplified by PCR using degenerate oligodeoxyribonucleotide primers derived from the known amino acid (aa) sequence of the Bm Lyz. These PCR fragments were used to screen a fat body cDNA
Isolation and characterization of a cDNA encoding for a lysozyme from the gut of the reduviid bug Triatoma infestans.
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We have isolated and characterised a Triatoma infestans cDNA encoding a lysozyme. A 174-bp fragment was amplified by PCR using degenerate oligodeoxyribonucleotide primers derived from the known amino acid sequences of lysozyme from other insects. This PCR fragment was used to screen a cDNA gut
Structural basis of protein oxidation resistance: a lysozyme study.
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Accumulation of oxidative damage in proteins correlates with aging since it can cause irreversible and progressive degeneration of almost all cellular functions. Apparently, native protein structures have evolved intrinsic resistance to oxidation since perfectly folded proteins are, by large most
Noncovalent PEGylation: different effects of dansyl-, L-tryptophan-, phenylbutylamino-, benzyl- and cholesteryl-PEGs on the aggregation of salmon calcitonin and lysozyme.
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Protein aggregation is a major instability that can occur during all stages of protein drug production and development. Protein aggregates may compromise the safety and efficacy of the final protein formulation. In this paper, various new excipients [phenylbutylamino-, benzyl-, and
Muscle fibre atrophy in critically ill patients is associated with the loss of myosin filaments and the presence of lysosomal enzymes and ubiquitin.
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Muscle wasting and weakness are common features of patients with critical illnesses, and may impair their recovery. This study examines whether cytoskeletal and contractile proteins are damaged, and which proteolytic mechanisms might be involved, in the muscle fibre atrophy or necrosis associated
Relevance of amadori and maillard products to seed deterioration.
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The possible role of Amadori and Maillard reactions in the deterioration of dry seeds was investigated using model systems and whole soybean seeds, Glycine max cv Hodgson. In model systems of glucose plus an enzyme (lysozyme), the production of Amadori products was accelerated by higher temperature
Aggregation and chemical reaction in hen lysozyme caused by heating at pH 6 are depressed by osmolytes, sucrose and trehalose.
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We examined the effects of osmolytes, sucrose and trehalose, on the deterioration of hen lysozyme as a model protein. Sucrose and trehalose depressed the aggregation of lysozyme molecules caused by heating at 100 degrees C at pH 6. Since lysozyme was fully denatured under these conditions, the
Ethyl gallate, a scavenger of hydrogen peroxide that inhibits lysozyme-induced hydrogen peroxide signaling in vitro, reverses hypotension in canine septic shock.
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Although hydrogen peroxide (H2O2) is a well-described reactive oxygen species that is known for its cytotoxic effects and associated tissue injury, H2O2 has recently been established as an important signaling molecule. We previously demonstrated that lysozyme (Lzm-S), a mediator of sepsis that is
Use of deoxyinosine-containing primers vs degenerate primers for polymerase chain reaction based on ambiguous sequence information.
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The performance of oligonucleotide primers containing deoxyinosine (dl) at all ambiguous positions for polymerase chain reaction, based on ambiguous sequence information derived either from compilations of consensus nucleotide sequences or from amino acid sequences, has been evaluated in two model
Degenerative processes of elastic fibers in sun-protected and sun-exposed skin: immunoelectron microscopic observation of elastin, fibrillin-1, amyloid P component, lysozyme and alpha1-antitrypsin.
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Degenerative processes of elastic fibers in sun-protected and sun-exposed skin were analyzed by light and electron microscopic (post-embedding) immunocytochemistry using antisera to elastin, fibrillin-1, amyloid P component, lysozyme and alpha1-antitrypsin. To assess the effect of aging and sun
Cadmium induces osteomalacia mediated by proximal tubular atrophy and disturbances of phosphate reabsorption. A study of 11 autopsies.
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Osteomalacia of cadmium (Cd) poisoning (Itai-Itai disease) is induced by renal tubular dysfunction; however, the precise pathological changes and mechanisms have not been adequately elucidated. Of the 25 inhabitants in a Cd-polluted area who developed chronic tubular proteinuria, 22 individuals died
Long-Term Oral Administration of LLHK, LHK, and HK Alters Gene Expression Profile and Restores Age-Dependent Atrophy and Dysfunction of Rat Salivary Glands.
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Xerostomia, also known as dry mouth, is caused by a reduction in salivary secretion and by changes in the composition of saliva associated with the malfunction of salivary glands. Xerostomia decreases quality of life. In the present study, we investigated the effects of peptides derived from
Crystal structure of a cross-reaction complex between Fab F9.13.7 and guinea fowl lysozyme.
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The crystal structure of the complex between the cross-reacting antigen Guinea fowl lysozyme and the Fab from monoclonal antibody F9.13.7, raised against hen egg lysozyme, has been determined by x-ray diffraction to 3-A resolution. The antibody interacts with exposed residues of an alpha-helix and
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