Abstract：
:Striatal dopamine (DA) and metabolite (DOPAC) levels in 8-, 21-, 52- and 104-week-old C57BL mice were compared with those in 11-week-old mice, 20 days after 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) treatment. DA and DOPAC concentrations expressed relative to striatal wet weight did not change with age. In contrast, DA and DOPAC levels increased almost linearly when values were expressed relative to the proportion of remaining tyrosine hydroxylase-positive (TH+) SNc neurons, reaching a 5-7-fold increase per average remaining TH+ neuron by 104 weeks of age (corresponding to neuronal loss of 70%) relative to that found per average neuron in 8-week-old mice. DA and DOPAC levels per average remaining TH+ SNc neuron following MPTP increased for low doses (neuronal losses less than 42%) but decreased for higher doses (55 and 70% losses) but the DOPAC/DA ratio per SNc neuron increased and was 9-fold higher in the 300 mg/kg MPTP-treated animals in comparison to saline controls. Cytoplasmic TH protein (estimated by somal TH immunodensity) was increased by 45% in SNc somata from mice treated with 150 mg/kg MPTP in comparison to saline controls, and by 63% in 104-week-old mice in comparison to 8-week-old animals. This study provides evidence that an average surviving TH+ SNc neuron compensates for the age-related loss of other SNc neurons by increasing dopamine synthesis similar to younger SNc neurons surviving low levels of toxically induced damage and that the compensation may be in part mediated by increased synthesis of TH.
journal_name
Neurobiol Agingjournal_title
Neurobiology of agingauthors
Greenwood CE,Tatton WG,Seniuk NA,Biddle FGdoi
10.1016/0197-4580(91)90087-zsubject
Has Abstractpub_date
1991-09-01 00:00:00pages
557-65issue
5eissn
0197-4580issn
1558-1497pii
0197-4580(91)90087-Zjournal_volume
12pub_type
杂志文章abstract：:The neuroprotective effects of menopausal hormonal therapy in Parkinson's disease have not yet been clarified, and it is not known whether there is a critical period. Estrogen induced significant protection against 6-hydroxydopamine-induced dopaminergic degeneration when administered immediately or 6 weeks, but not 20...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/j.neurobiolaging.2014.10.028
更新日期：2015-02-01 00:00:00
abstract：:There is a large body of evidence highlighting the importance of oxidative stress in the pathogenesis of Alzheimer's disease (AD). We have previously standardised a method that can be applied to study oxidative changes in individual brain proteins by using two-dimensional oxyblots (Korolainen MA, Goldsteins G, Alafuzo...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/j.neurobiolaging.2004.11.010
更新日期：2006-01-01 00:00:00
abstract：:Elevated expression of human hyperphosphorylated tau is associated with neuronal loss and white matter (WM) pathology in Alzheimer's disease (AD) and related neurodegenerative disorders. Using in vivo diffusion tensor magnetic resonance imaging (DT-MRI) at 11.1 Tesla we measured age-related alterations in WM diffusion...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/j.neurobiolaging.2013.12.009
更新日期：2014-06-01 00:00:00
abstract：:Firing characteristics of "place" cells in dorsal CA1 of hippocampus were recorded from 5 young (10-14 months) and 5 old (25-29 months) Fischer-344 rats. Animals were trained to obtain food reward on a radial 8-arm maze. Entry to the arms was controlled by the experimenter so that all 8-arm were visited in random sequ...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/0197-4580(83)90034-9
更新日期：1983-07-01 00:00:00
abstract：:Calmodulin (CaM) and tubulin were analyzed by radioimmunoassay in subcellular fractions prepared from cerebral cortex and striatum of aging male C57BL/6J mice. Three fractions were prepared by a new procedure: cytosol (soluble); EGTA-releasable, membrane-bound; and detergent-extractable (Triton X-100), membrane-bound ...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/0197-4580(87)90022-4
更新日期：1987-03-01 00:00:00
abstract：:The H1 MAPT haplotype in the 17q21 chromosomal region has been associated with several neurodegenerative diseases. Some reports have suggested that there is an association between genetic variants within the H1 haplotype with Parkinson's disease (PD), progressive supranuclear palsy (PSP) and corticobasal degeneration ...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/j.neurobiolaging.2009.09.011
更新日期：2011-03-01 00:00:00
abstract：:Frontotemporal lobar degeneration is a neuropathological disorder that causes a variety of clinical syndromes including frontotemporal dementia (FTD), progressive supranuclear palsy, and corticobasal syndrome (CBS). FTD associated with parkinsonism occurs frequently as a result of mutations in the C9orf72 gene and als...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/j.neurobiolaging.2017.02.002
更新日期：2017-05-01 00:00:00
abstract：:Inflammation in the aging brain increases risk for neurodegenerative disease. In humans, the regulator of G-protein signaling-10 (RGS10) locus has been associated with age-related maculopathy. Chronic peripheral administration of lipopolysaccharide in the RGS10-null mice induces nigral dopaminergic (DA) degeneration, ...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/j.neurobiolaging.2015.02.006
更新日期：2015-05-01 00:00:00
abstract：:Transcranial magnetic stimulation may represent an effective means for improving motor function in the elderly. The aim of this study was therefore to investigate the effects of paired associative stimulation (PAS; a plasticity-inducing transcranial magnetic stimulation paradigm) on acquisition of a novel visuomotor t...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/j.neurobiolaging.2019.05.017
更新日期：2019-09-01 00:00:00
abstract：:Advanced age is associated with a higher incidence of stroke and worse functional outcomes. Vagus nerve stimulation (VNS) paired with rehabilitative training has emerged as a potential method to improve recovery after brain injury but to date has only been evaluated in young rats. Here, we evaluated whether VNS paired...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/j.neurobiolaging.2016.03.030
更新日期：2016-07-01 00:00:00
abstract：:The goal of this experiment was to determine the correlations among different behavioral and neurobiological measures in aged rats. Aged Sprague-Dawley rats were given a battery of cognitive and sensorimotor tests, followed by electrophysiological assessment of sleep and biochemical measurements of various neurotransm...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/s0197-4580(89)80008-9
更新日期：1989-01-01 00:00:00
abstract：:In a prospective study of dementia in Flanders (Belgium), we observed a substantial fraction of early-onset dementia patients who did not fulfill the criteria for a specific dementia subtype, leaving the patients without a precise clinical diagnosis. We selected 211 of these patients for genetic testing of causal gene...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/j.neurobiolaging.2018.04.015
更新日期：2018-09-01 00:00:00
abstract：:Accumulating evidence suggests that engagement in leisure activities is associated with favorable trajectories of cognitive aging, but little is known about brain changes related to both activities and cognition. White matter microstructure shows experience-dependent plasticity and declines in aging. Therefore, we inv...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/j.neurobiolaging.2016.02.013
更新日期：2016-05-01 00:00:00
abstract：:Recent reports have suggested that beta-amyloid (A beta) species of variable length C-termini are differentially deposited within early and late-stage plaques and the cerebrovasculature. Specifically, longer C-terminal length A beta 42/3 fragments (i.e., A beta forms extending to residues 42 and/or 43) are thought to ...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/0197-4580(96)00062-0
更新日期：1996-07-01 00:00:00
abstract：:The effect of aging on acquisition of a learned suppression of photopositive tendencies was studied in 1-7-week-old flies of both sexes. Flies had to choose in a T-maze between an alley leading to a lighted vial associated with an aversive stimulus, a quinine hydrochloride solution, and another alley leading to a dark...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/j.neurobiolaging.2003.12.004
更新日期：2004-10-01 00:00:00
abstract：:GRN mutations are frequent causes of familial frontotemporal degeneration. Although there is no clear consensual threshold, plasma progranulin levels represent an efficient biomarker for predicting GRN mutations when decreased. We evaluated plasma levels to determine whether it could also predict age at onset, clinica...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/j.neurobiolaging.2020.02.014
更新日期：2020-07-01 00:00:00
abstract：:Although peripheral nerves are capable of regeneration, advanced age decreases the potential for functional recovery after injury. The cellular mechanisms for this are not currently understood. Here, we performed sciatic nerve grafting with young (2 months old) and aged (18 months old) Brown-Norway male rats, in which...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/j.neurobiolaging.2016.05.004
更新日期：2016-09-01 00:00:00
abstract：:Neuropeptide Y (NPY) has been implicated in the control of reproductive and cardiovascular function. We observed an age-related decrease in the number of males copulating to ejaculation and a moderate systolic hypertension in middle-aged (16- to 17-month-old) rats. NPY content was examined in microdissected brain nucl...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/0197-4580(94)90111-2
更新日期：1994-03-01 00:00:00
abstract：:Transgenic mice expressing mutant forms of both amyloid-beta (Abeta) precursor protein (APP) and presenilin (PS) 2 develop severe brain amyloidosis and cognitive deficits, two pathological hallmarks of Alzheimer's disease (AD). One-year-old APP/PS2 mice with high brain levels of Abeta and abundant Abeta plaques show d...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/j.neurobiolaging.2005.06.015
更新日期：2006-09-01 00:00:00
abstract：:Time-dependent changes in brain activity were assessed in a group of older adults who maintained good physical and cognitive health at years 1, 3, 5, 7, and 9 of the Baltimore Longitudinal Study of Aging neuroimaging study. Each year, these participants underwent PET scans during rest and delayed verbal and figural re...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/j.neurobiolaging.2006.11.011
更新日期：2008-04-01 00:00:00
abstract：:Altered glutamate transport and aberrant EAAT1 expression were shown in Alzheimer's disease (AD) brains. It is presently unknown whether these modifications are a consequence of neurodegeneration or play a pathogenetic role. However, recent findings of decreased glutamate uptake, EAAT1 protein and mRNA in AD platelets...
journal_title：Neurobiology of aging
pub_type： 临床试验,杂志文章
doi：10.1016/j.neurobiolaging.2004.07.007
更新日期：2005-06-01 00:00:00
abstract：:We conducted genetic analysis of the fused in sarcoma gene (FUS) in Chinese Han patients with essential tremor (ET) in a case-control association study. One hundred eighty unrelated patients with ET were screened for mutations in the coding region and exon-intron boundaries of FUS. Reverse transcriptase polymerase cha...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/j.neurobiolaging.2013.03.001
更新日期：2013-08-01 00:00:00
abstract：:Oxidative stress has been linked to noise- and drug-induced as well as age-related hearing loss. Antioxidants can attenuate the decline of cochlear structure and function after exposure to noise or drugs, but it is debated as to whether they can protect from age-related hearing loss. In a long-term longitudinal study,...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/j.neurobiolaging.2011.10.023
更新日期：2012-05-01 00:00:00
abstract：:The supraoptic nucleus of the F344 rat shows an age-related dendritic regression. In order to determine whether this previously observed dendritic regression may have been related to extrinsic (to the cell) hormonal, neurotoxic, or other circulating factors unique to the hypothalamus of older brains, we conducted a qu...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/0197-4580(85)90051-x
更新日期：1985-10-01 00:00:00
abstract：:We previously found a selective loss of the brain specific APP-695 transcript in Alzheimer's disease (AD) cortex, which results in a 2.5-fold increase in the APP-751/APP-695 transcript ratio in AD (9). Here we report a similar increase in APP-751/APP-695 mRNA ratio in AD hippocampus. However, the cerebellum had a 6-fo...
journal_title：Neurobiology of aging
pub_type： 更正并重新发布的文章,杂志文章
doi：10.1016/0197-4580(89)90017-1
更新日期：1989-11-01 00:00:00
abstract：:Demonstrations that grip strength has predictive power in relation to a range of health conditions-even when these are assessed decades later-has motivated claims that hand-grip dynamometry has the potential to serve as a "vital sign" for middle-aged and older adults. Central to this belief has been the assumption tha...
journal_title：Neurobiology of aging
pub_type： 杂志文章,评审
doi：10.1016/j.neurobiolaging.2018.07.023
更新日期：2018-11-01 00:00:00
abstract：:As a major characteristic of aging process, neuroinflammation is involved in the pathogenesis of several aging-related diseases including Alzheimer's disease (AD). Triggering receptor expressed on myeloid cells 2 (TREM2) is a newly identified risk gene for AD, which regulates inflammatory process in peripheral tissues...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/j.neurobiolaging.2013.11.026
更新日期：2014-06-01 00:00:00
abstract：:Since diabetes is a risk factor for Alzheimer's disease (AD), we asked if there is a functional interaction between high glucose and elevated beta amyloid peptide (Abeta) in cultured brain microvascular endothelial cells and presymptomatic AD transgenic mice. When cultured brain microvascular endothelial cells are exp...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/j.neurobiolaging.2008.02.010
更新日期：2009-12-01 00:00:00
abstract：:Aged rats perform poorly on spatial learning tasks, a cognitive impairment which has been linked to the failure of hippocampal networks to fully encode changes in the external environment [Barnes CA, Suster MS, Shen J, McNaughton BL. Multistability of cognitive maps in the hippocampus of old rats. Nature 1997;388(6639...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/j.neurobiolaging.2004.09.006
更新日期：2005-07-01 00:00:00
abstract：:In this study we employed an ELISA assay to measure alpha-synuclein protein in lymphomonocytes from 78 PD patients and 78 controls. We correlated protein levels with demographic and clinical characteristics and with the chymotryptic and tryptic activities of the 20S proteasome. Alpha-synuclein levels were not signific...
journal_title：Neurobiology of aging
pub_type： 杂志文章
doi：10.1016/j.neurobiolaging.2008.06.010
更新日期：2010-05-01 00:00:00
