Abstract:
:The lysosomal system has often been considered a prominent morphologic marker of distressed or dying neurons. Lysosomes or their constituent hydrolases have been viewed in different neuropathologic states as either initiators and direct agents of cell death, agents of cellular repair and recompensation, effectors of end-stage cellular dissolution, or autolytic scavengers of cellular debris. Limited data and limitations of methodology often do not allow these potential roles to be discriminated. In all forms of neurodegeneration, it may be presumed that lysosomes ultimately rupture and release various hydrolases that promote cell autolysis during the final stages of cellular disintegration. Beyond this perhaps universal contribution to cell death, the degree to which the lysosomal system may be involved in neurodegenerative states varies considerably. In many conditions, morphologic evidence for activation of the lysosomal system is minimal or undetectable. In other cases, lysosomal activation is evident only when other morphologic signs of cell injury are also present. This level of participation may be viewed as either an attempt by the neuron to compensate for or repair the injury or a late-stage event leading to cell dissolution. The early involvement of the lysosomal system in neurodegeneration occurs most commonly in the form of intraneuronal accumulations of abnormal storage profiles or residual bodies (tertiary lysosomes). Very often the lysosomal involvement can be traced to a primary defect or dysfunction of lysosomal components or to accelerated or abnormal membrane breakdown that leads to the buildup of modified digestion-resistant substrates within lysosomes. Because they are often striking, changes in the lysosomal system are a sensitive morphologic indicator of certain types of metabolic distress; however, whether they reflect a salutary response of a compromised neuron or a mechanism to promote cell death and removal of debris from the brain remains to be established for most conditions. Factors that may influence the lysosomal response during lethal neuronal injury include species differences, stage of neuronal development, duration of injury and pace of cell death. The lysosomal system may be more closely coupled to certain forms of neuronal cell death in lower vertebrate or invertebrate systems than in mammalian systems.
journal_name
Ann N Y Acad Scijournal_title
Annals of the New York Academy of Sciencesauthors
Nixon RA,Cataldo AMdoi
10.1111/j.1749-6632.1993.tb18291.xsubject
Has Abstractpub_date
1993-05-28 00:00:00pages
87-109eissn
0077-8923issn
1749-6632journal_volume
679pub_type
杂志文章,评审abstract::This study surveyed serum concentrations of vitamins, electrolytes, and trace elements in subjects seropositive for HIV-1 by ELISA and confirmatory Western blot. Thirty subjects (26 males, 4 females) were recruited at a hospital clinic. Seventeen were classified as having mild or severe ARC (AIDS-related complex), 7 h...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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更新日期:1994-09-15 00:00:00
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journal_title:Annals of the New York Academy of Sciences
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更新日期:1994-11-17 00:00:00
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journal_title:Annals of the New York Academy of Sciences
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更新日期:1984-01-01 00:00:00
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journal_title:Annals of the New York Academy of Sciences
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更新日期:2005-12-01 00:00:00
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journal_title:Annals of the New York Academy of Sciences
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更新日期:1991-01-01 00:00:00
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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journal_title:Annals of the New York Academy of Sciences
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abstract::Myasthenia gravis (MG) is usually caused by autoantibodies against muscle nicotinic acetylcholine receptor (AChR), which is composed of five subunits (alpha(2)betagammadelta or alpha(2)betaepsilondelta). Current treatments, including plasmapheresis, are nonspecific, causing several side effects. We aim to develop an a...
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abstract::Gene expression regulation, in particular at the level of transcription, has been demonstrated to play a key role in the development of human diseases, including cancer, and in bacteria it is crucial for proliferation as well as for pathogenicity. Transcriptional regulation is based on complex networks of interactions...
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abstract::This paper will review our recent data relevant to the antioxidant effects of N-acetylserotonin (NAS), the immediate precursor of melatonin, the pineal gland indole. Mechanisms of the antioxidant effects of NAS might involve interaction with melatonin type 3 receptors and nonreceptor mechanisms such as stimulation of ...
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更新日期:2005-08-01 00:00:00
abstract::Blood-borne beta-amyloids (A beta s) could affect brain function by (1) crossing the BBB to directly interact with brain tissues or (2) altering BBB function by interacting with the brain capillaries that make up the BBB. Several radioactively labeled A beta s have been examined for such interactions. Blood-borne A be...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章,评审
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更新日期:1997-09-26 00:00:00
abstract::Although smell loss has several potential etiologies (e.g., head trauma, allergic rhinitis, and enlarged adenoids) that are common among children, studies evaluating the prevalence of olfactory dysfunction in the pediatric population are rare. Several challenges confront the clinician or researcher hoping to evaluate ...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
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更新日期:2009-07-01 00:00:00
abstract::Patients with probable Alzheimer's disease were either stimulated with a continuous visual recognition task (n = 18) or with a continuous auditory recognition task during PET measurement with 18 FDG. The PET scanner was a Siemens CTI, ECAT EXACT with 5 mm transaxial and 6 mm axial resolution. The global stimulation ef...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
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更新日期:1996-01-17 00:00:00
abstract::Galanin is widely distributed in enteric nerves and nerve terminals throughout the gastrointestinal (GI) tract. Within the GI tract galanin is best known for its ability to alter smooth muscle contractility and regulate intestinal motility. However, recent studies also indicate that galanin can modulate epithelial ion...
journal_title:Annals of the New York Academy of Sciences
pub_type: 杂志文章
doi:10.1111/j.1749-6632.1998.tb10684.x
更新日期:1998-12-21 00:00:00