(1) The proliferation of this cell type may represent an escape from the senescence pathway and progression to immortal tumor cells.
(2) In senescent rats, however, the proportions of salt-soluble and detergent-soluble AChE may differ from those in young rats.
(3) In addition, we have shown that long-lived, presumably non-senescent, strains do not arise by suppressor mutation, but lose senescence plasmid DNA by another mechanism.
(4) Senescent (26-28 months) Fischer 344 rats were shown to have a lower density of D2 sites (-36%) without any change in affinity in membranes prepared from homogenized caudate-putamen (CPU), as compared to young adult (5-6 months) rats.
(5) The cell cycle-dependent changes in the transglutaminase mRNA levels strongly support the implicated involvement of the enzyme in cell growth, differentiation, and senescence.
(6) The increased levels of HK1 could affect other erythrocyte metabolic pathways slowing down the physiological rate of cellular senescence and result in increased activity levels of other cell-age-dependent enzymes.
(7) Advancing age was associated with a reduction in cell proliferative responses to PHA in both substrains, although the rate of decline was significantly more rapid in the senescence-prone animals.
(8) Instead of degenerative changes, these results show an activation of the vasopressinergic system in senescence and in SDAT patients, similar to earlier observations in the aged rat and in accordance with a rise in human neurophysin and VP levels reported recently.
(9) Thus, constitutive expression of specific cytochrome P450 genes is repressed or activated in senescent rats.
(10) Mild daily exercise, maintained throughout adult life into early senescence, attenuates muscle atrophy and promotes adaptive enzymatic changes in atrophying muscles.
(11) A second set of experiments which involved the injection of E2 into senescent male as well as female rats indicated that there were no sex differences in improvements in inclined screen performance, and that once the E2 injections were discontinued, performance returned to preadministration levels.
(12) Additionally, analysis of the multiple steps occurring in the El cultures, as well as in the emergence of the continuous cell lines, could potentially elucidate the processes occurring during human epithelial cell carcinogenesis and escape from senescence.
(13) Significant anamnestic SIgA responses were shown after oral immunization with DNP-BGG in adult rats, but was not observed in the senescent and midlife (10-12 months) rats.
(14) Modulation of cellular senescence by growth factors, hormones, and genetic manipulation is contrasted, but newer studies in oncogene involvement are omitted.
(15) Under the same conditions, PM from senescent mice generated 62% of the initial O2- produced in response to zymosan, and 45% in response to OZ.
(16) Untreated cells, or cells treated with MCA or TPA only, usually became senescent around 6-8 weeks after plating and died, but those treated with both MCA and TPA became immortalised and underwent transformation to a phenotype capable of growth in soft agar.
(17) Because immune senescence most profoundly affects T lymphocyte functions, we suspected that LIA production would decline with age.
(18) Abnormal granular structures, which stained positively with periodic acid-Schiff (PAS-positive granular structures; PGS), were observed in the brain of senescence accelerated mouse (SAM).
(19) In senescent females the number of small IMPs was decreased in the perikarya and dendritic shafts compared to young females while the number of large particles was increased in the outer leaflet of the membrane of dendritic shafts, reaching values similar to those observed in males.
(20) Our data suggest that the release of u-PA antigen by human macrovascular endothelial cells can be used as an indicator of cell senescence.
Senile
Definition:
(a.) Of or pertaining to old age; proceeding from, or characteristic of, old age; affected with the infirmities of old age; as, senile weakness.
Example Sentences:
(1) Hyperopia was more common in younger persons, but senile cataract, macular degeneration and palpebral dermatochalasis or blepharochalasis were more common in older persons.
(2) Mucosal drying medications and senile salivary gland atrophy seemed to contribute to the high frequency of sicca in this population with a lesser proportion of the subjects demonstrating previously undiagnosed Sjögren's and possible Sjögren's syndrome.
(3) Key findings include a progressive degeneration of these cholinergic neurons characterized by the formation of immunoreactively atypical NFT, the loss of intraneuronal lipofuscin, a lack of senile plaque and beta-amyloid deposition within the basal forebrain, and end-stage gliosis without residual extracellular NFT.
(4) This finding is consistent with the hypothesis that the majority of deaths attributed to presenile dementia and the majority of deaths from senile dementia are the result of the same disease entity.
(5) Diagnoses like neuroses, alcoholism, and senile dementia produced many visits by few patients.
(6) Her mother had only senile pigmented modification of the fundus and her three daughters had mild macular pigmented changes, like "salt and pepper."
(7) The reduced effectiveness of protection by antibody against viruses which had caused influenza disease 20--30 years ago was conducive to the spread of influenza Al cases among middle-aged and senile population.
(8) Since the detailed molecular events leading to the formation of amyloid-containing senile plaques of the Alzheimer's disease (AD) brain are incompletely understood, the present studies were undertaken to address this issue using a combination of molecular and cytochemical approaches.
(9) Recently in senile dementia of Alzheimer type, neuronal loss of cholinergic neurons in the substantia innominata is described.
(10) Whereas markedly high values of 1, 25-(OH)2D in plasma were found in some cases of primary hyperparathyroidism with prominent bone resorption, relatively low values were seen in some patients with chronic renal failure, senile osteoporosis, osteomalacia and hypercalcemia due to bone metastasis.
(11) The ultrastructure of the water-clear cells of the parathyroid glands in the starved adult and senile animals almost resembled that of the control adult and senile animals.
(12) The study of the drugs effective in the treatment of cognitive deficits and memory loss associated with senile dementia of the Alzheimer's type--tacrine and amiridin, acetylcholinesterase inhibitor physostigmine and nootrop piracetam on uptake of 3H-serotonin (3H-5-HT), 3H-adrenaline (3H-AD), 3H-noradrenaline (3H-HA), 2H-dopamine (3H-DA), 3H-gamma-aminobutyric acid (3H-GABA), 3H-glutamic acid (3H-GLU), 3H-aspartic acid (3H-ASP) and 3H-glycine (3H-GLI) showed that tacrine and amiridin (5 x 10(-5) M) statistically significantly (P less than 0.05) inhibited the uptake of 3H-DA and 3H-5-HT.
(13) The results are as follows: The neurites of senile DRG cells appeared 7 days later than the neurites of neonatal DRG cells.
(14) Although a trend was observed for TMA-DPH mobility to parallel histopathologic severity in hippocampal specimens, the biophysical changes did not appear to reflect a loss of neuronal membranes relative to glial membranes or the presence of senile plaques or neurofibrillary tangles.
(15) Corticotropin-releasing hormone-immunoreactivity (CRH-IR) and CRH receptors (binding capacity and affinity) were measured in postmortem cortical areas from depressed subjects, two groups of senile dementia of the Alzheimer type (SDAT), and age-, sex-, and postmortem-delay-matched controls.
(16) Anti-beta-peptide stained cerebrovascular and plaque core amyloid in all AD cases as well as cerebrovascular amyloid and senile plaque core amyloid in five elderly CJD cases.
(17) Senile dementia and admission other than from the patient's own home, were factors associated with a poorer long term outcome.
(18) In this study 40 fragments of human skin from 4 groups were included: children, adults, aged people with lesions of senile keratosis and without lesions of senile keratosis.
(19) To examine the efficacy of cholinergic enhancement in senile dementia of the Alzheimer type (SDAT), oral physostigmine was given to eight patients in a cross-over trial of three dose levels and a matching placebo.
(20) Here the presence and distribution within senile plaques of various epitopes of the beta-amyloid precursor protein (APP) are compared with the distribution of A beta P itself and markers for plaque neurites.