Only show
results for:

Topics related to "Senescence"

aging
aging in biology, cumulative changes in an organism, organ, tissue, or cell leading to a decrease in functional capacity. In humans, aging is associated with degenerative changes in the skin, bones, heart, blood vessels, lungs, nerves, and other organs and tissues. The branch of medicine that deals... Read more

Encyclopedia entries related to "Senescence"

Cellular Aging
Encyclopedia entry from: Encyclopedia of Aging ...model of human aging. The hallmark of senescence is the inability of cells to replicate...believed to contribute to the process of senescence. The appearance of growth inhibitors...expressed. The factors controlling senescence are dominant over those that control...
Theories of Biological Aging: Programmed Aging
Encyclopedia entry from: Encyclopedia of Aging ...repair themselves, leading to cell senescence and death. Other investigators felt...The proposed mechanisms of programmed senescence included the existence of a life-span...Further refinement of the programmed senescence theory was developed by Bernard Strehler...
Cellular Aging: Cell Death
Encyclopedia entry from: Encyclopedia of Aging ...Perhaps the best known of these is cellular senescence. Cellular senescence First identified in the late 1960s by Leonard Hayflick and his collaborators, the term cellular senescence refers to the fact that normal, nonmalignant...
Physiological Changes, Fibroblast Cells
Encyclopedia entry from: Encyclopedia of Aging ...x2014; or, more accurately, cellular senescence — in culture. In the early...accurately, been termed replicative senescence. Since the 1960s, many cell types...causes and consequences of replicative senescence comes from studies of human fibroblasts...
Accelerated Aging: Animal Models
Encyclopedia entry from: Encyclopedia of Aging ...to study accelerated aging, accelerated senescence, premature aging, premature senescence, and progeria-like syndromes. These models...mortality suggests that the rate of organismic senescence is not accelerated by life-shortening radiation...
ageing
Book article from: The Oxford Companion to the Body ...from complete. Cell replicative senescence Much research on cell ageing...phenomenon of cell replicative senescence. Cells from many tissues can...suggest that cell replicative senescence may be primarily an anti-cancer...
Genetics: Tumor Suppression
Encyclopedia entry from: Encyclopedia of Aging ...damage, and in the responses to DNA damage; namely, cellular senescence and apoptosis. Proteins encoded by tumor suppressor genes...itself, a transcription factor that induces either cellular senescence, apoptosis, or cell-cycle arrest and DNA repair. Loss...
Primates
Encyclopedia entry from: Encyclopedia of Aging ...cardiovascular dysfunction, and osteoporosis), reproductive senescence, neurobiological aging and related cognitive decline, and...male counterparts. Part of the problem may stem from the senescence of the reproductive system, and a critical factor in this...
Immunology: Animal Models
Encyclopedia entry from: Encyclopedia of Aging ...the progressive increase begins with the onset of immune senescence, i.e., dimunution of T lymphocyte function accompanying...These observations indicate that the onset of both immune senescence and skin aging are not dependent on time, but are genetically...
euthanasia
Book article from: The Oxford Companion to the Body ...Christian medicine would surpass pagan science by the conquest of senescence. Francis Bacon and the later philosophers of the Enlightenment...interest in prolongevity. Benjamin Franklin boldly declared senescence to be not a natural process but a ‘disease...

Dictionary entries related to "Senescence"

senescence
Book article from: A Dictionary of Plant Sciences senescence The complex deteriorative processes that terminate naturally the functional life of an...decrease in chlorophyll content and in the ability of the plant to photosynthesize. Plant senescence is controlled by hormones .
racial senescence
Book article from: A Dictionary of Ecology racial senescence See phylogerontism .
phylogerontism
Book article from: A Dictionary of Plant Sciences phylogerontism ( racial senescence ) An outmoded view of evolution which asserted that lineages proceeded through a life cycle, from youth to senility. Lineages on the verge of extinction were thus thought of as examples of racial senescence or phylogerontism.
Maupas, François Émile
Dictionary entry from: Complete Dictionary of Scientific Biography ...of the infusorians. His observations were later confirmed by other protistologists — who showed, however, that senescence does not have the absolute and inevitable character that Maupas had attributed to it. He also demonstrated that there are...
kinetin
Book article from: A Dictionary of Plant Sciences kinetin ( 6-fururylaminopurine ) A degradation product of animal DNA, which does not occur naturally and which has properties similar to those of cytokinins . Applied to certain leaves, kinetin delays senescence in its vicinity and attracts nutrients.
carotenoid
Book article from: A Dictionary of Plant Sciences ...between 450 and 480 nm. The group includes the carotenes , which are orange, and xanthophylls, which are yellow. During the senescence of leaves, chlorophyll breaks down faster than carotenoids and carotenoid colours are revealed. In the vertebrate liver...
climacteric
Book article from: A Dictionary of Plant Sciences climacteric The phase of increased respiration found at the ripening of fruit and at senescence .
mitochondrial theory of ageing
Book article from: A Dictionary of Biology mitochondrial theory of ageing See senescence .
cytokinin
Book article from: A Dictionary of Biology ...numerous aspects of plant metabolism. They stimulate cell division in the presence of auxin and have also been found to delay senescence, overcome apical dominance , and promote cell expansion. They are produced by growing roots in spring and translocated to...
ageing
Book article from: A Dictionary of Biology ageing See senescence .

Thesaurus entries related to "Senescence"

age
Book article from: The Oxford Pocket Thesaurus of Current English ...age | age can bring infirmity synonyms : maturity, seniority, elderliness, oldness, old age; advancing years, declining years; fml. senescence.   3. the Elizabethan/nuclear age synonyms : era, epoch, period, time.
old
Book article from: The Oxford Pocket Thesaurus of Current English ...synonyms : oldness, elderliness, age, agedness, declining years, advanced years, winter/autumn of one's life, senescence, senility, dotage. antonyms: young; new; modern.   USAGE NOTES   aged, ancient, antediluvian, antiquated...

Related newspaper, magazine, and trade journal articles from HighBeam Research

Senescence-associated gene expression during ozone-induced leaf senescence in Arabidopsis
Magazine article from: Plant Physiology; 8/1/1999; ; 700+ words ; The expression patterns of senescence-related genes were determined during...Transcript levels for eight of 12 senescence related genes characterized showed induction by O^sub 3^. SAG13 (senescence-associated gene), SAG21, ERD1...
Senescence is induced in individually darkened Arabidopsis leaves, but inhibited in whole darkened plants
Magazine article from: Plant Physiology; 11/1/2001; ; 700+ words ; Senescence Is Induced in Individually Darkened...Plants1 It has long been known that leaf senescence can be induced in many plant species...not when entire plants are darkened, senescence is induced in the covered leaves. This...
Senescence induction; a possible cancer therapy.(Review)(Clinical report)
Magazine article from: Molecular Cancer; 1/8/2009; ; 700+ words ; ...This process, termed replicative senescence, is characterized by a drastic phenotypic...by cultured cells before they reach senescence depends on the species from which the...incipient cancer cells must breach this senescence barrier that normally limits their proliferative...
Networking senescence-regulating pathways by using Arabidopsis enhancer trap lines
Magazine article from: Plant Physiology; 6/1/2001; ; 700+ words ; Networking Senescence-Regulating Pathways by Using Arabidopsis...development, generally referred to as leaf senescence, is an integral part of plant development...photosynthetic capacity in a leaf, senescence limits crop yield and forest plant...
Leaf senescence is delayed in tobacco plants expressing the maize homeobox gene knotted1 under the control of a senescence-activated promtoer
Magazine article from: Plant Cell; 6/1/1999; ; 700+ words ; Leaf senescence is an active process involving remobilization...to other parts of the plant. Whereas senescence is accompanied by a decline in leaf...content, supplemental cytokinin delays senescence. Plants that overexpress isopentenyl...
Leaf senescence induced by mild water deficit follows the same sequence of macroscopic, biochemical, and molecular events as monocarpic senescence in pea
Magazine article from: Plant Physiology; 1/1/2002; ; 700+ words ; Leaf Senescence Induced by Mild Water Deficit Follows the Same...Biochemical, and Molecular Events as Monocarpic Senescence in Peal We have compared the time course of leaf senescence in pea (Pisum sativum L. cv Messire) plants...
Is Petal Senescence Due to Sugar Starvation?
Magazine article from: Plant Physiology; 1/1/2004; ; 700+ words ; Senescence occurs at every stage of plant development...the molecular events that initiate senescence have thus far remained a mystery. Thimann...starvation is the direct cause of leaf senescence. Later work with Arabidopsis plants...
Stem cells, senescence, neosis and self-renewal in cancer.(Hypothesis)(Report)
Magazine article from: Cancer Cell International; 12/1/2006; ; 700+ words ; ...advances on the suppressor role of senescence in tumor growth and the breakdown...during the origin of tumor growth. Senescence phenotype can be induced by (1) telomere attrition-induced senescence at the end of the cellular mitotic...
Lessons in Senescence
Magazine article from: The Scientist; 3/28/2005; ; 700+ words ; ...suicide or cancer. But when they undergo senescence, their destiny seems drab in comparison...19905, investigators have detected senescence in T lymphocytes extracted from HIV...he senses a modest resurgence in the senescence field after what he calls "a very dark...
Bcl-2 suppresses senescence and programmed cell death.
Newspaper article from: Health & Medicine Week; 6/21/2004; 700+ words ; ...NewsRx.net) -- Bcl-2 suppresses senescence and programmed cell death. According...induced irreversible growth arrest and senescence, but not to inhibit transient growth...E1B-19K are specifically involved in senescence without participating in growth arrest...