Growing old, frailty, and care of the elderly.
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Qurʾān
القرآن6 shownVerses named for this subject by hand come first. The rest are found by the subject’s own Arabic and English senses and are shown as lexical matches, not as anchors anyone has confirmed.
Qur'ān 16:70English sense: old age | Arabic sense: ارذل العمر
وَٱللَّهُ خَلَقَكُمۡ ثُمَّ يَتَوَفَّىٰكُمۡۚ وَمِنكُم مَّن يُرَدُّ إِلَىٰٓ أَرۡذَلِ ٱلۡعُمُرِ لِكَيۡ لَا يَعۡلَمَ بَعۡدَ عِلۡمࣲ شَيۡـًٔاۚ إِنَّ ٱللَّهَ عَلِيمࣱ قَدِيرࣱ
It is God who has created you and in time will cause you to die. Some of you will be reduced, in old age, to a most abject state, so that, after having knowledge, they will know nothing at all: God is truly all knowing and all powerful
Qur'ān 30:54Arabic sense: شيب | English sense: grey hair
۞ٱللَّهُ ٱلَّذِي خَلَقَكُم مِّن ضَعۡفࣲ ثُمَّ جَعَلَ مِنۢ بَعۡدِ ضَعۡفࣲ قُوَّةࣰ ثُمَّ جَعَلَ مِنۢ بَعۡدِ قُوَّةࣲ ضَعۡفࣰ ا وَشَيۡبَةࣰۚ يَخۡلُقُ مَا يَشَآءُۚ وَهُوَ ٱلۡعَلِيمُ ٱلۡقَدِيرُ
It is God who creates you weak, then gives you strength, then weakness after strength, together with your grey hair: He creates what He will; He is the All Knowing, the All Powerful
Qur'ān 22:5Arabic sense: ارذل العمر
يَٰٓأَيُّهَا ٱلنَّاسُ إِن كُنتُمۡ فِي رَيۡبࣲ مِّنَ ٱلۡبَعۡثِ فَإِنَّا خَلَقۡنَٰكُم مِّن تُرَابࣲ ثُمَّ مِن نُّطۡفَةࣲ ثُمَّ مِنۡ عَلَقَةࣲ ثُمَّ مِن مُّضۡغَةࣲ مُّخَلَّقَةࣲ وَغَيۡرِ مُخَلَّقَةࣲ لِّنُبَيِّنَ لَكُمۡۚ وَنُقِرُّ فِي ٱلۡأَرۡحَامِ مَا نَشَآءُ إِلَىٰٓ أَجَلࣲ مُّسَمࣰّ ى ثُمَّ نُخۡرِجُكُمۡ طِفۡلࣰ ا ثُمَّ لِتَبۡلُغُوٓاْ أَشُدَّكُمۡۖ وَمِنكُم مَّن يُتَوَفَّىٰ وَمِنكُم مَّن يُرَدُّ إِلَىٰٓ أَرۡذَلِ ٱلۡعُمُرِ لِكَيۡلَا يَعۡلَمَ مِنۢ بَعۡدِ عِلۡمࣲ شَيۡـࣰٔ اۚ وَتَرَى ٱلۡأَرۡضَ هَامِدَةࣰ فَإِذَآ أَنزَلۡنَا عَلَيۡهَا ٱلۡمَآءَ ٱهۡتَزَّتۡ وَرَبَتۡ وَأَنۢبَتَتۡ مِن كُلِّ زَوۡجِۭ بَهِيجࣲ
People, [remember,] if you doubt the Resurrection, that We created you from dust, then a drop of fluid, then a clinging form, then a lump of flesh, both shaped and unshaped: We mean to make Our power clear to you. Whatever We choose We cause to remain in the womb for an appointed time, then We bring you forth as infants and then you grow and reach maturity. Some die young and some are left to live on to such an age that they forget all they once knew. You sometimes see the earth lifeless, yet when We send down water it stirs and swells and produces every kind of joyous growth
Qur'ān 14:39English sense: old age
ٱلۡحَمۡدُ لِلَّهِ ٱلَّذِي وَهَبَ لِي عَلَى ٱلۡكِبَرِ إِسۡمَٰعِيلَ وَإِسۡحَٰقَۚ إِنَّ رَبِّي لَسَمِيعُ ٱلدُّعَآءِ
Praise be to God, who has granted me Ishmael and Isaac in my old age: my Lord hears all requests
Qur'ān 15:54English sense: old age
قَالَ أَبَشَّرۡتُمُونِي عَلَىٰٓ أَن مَّسَّنِيَ ٱلۡكِبَرُ فَبِمَ تُبَشِّرُونَ
He said, ‘How can you give me such news when old age has come to me? What sort of news is this?’
Qur'ān 2:266English sense: old age
أَيَوَدُّ أَحَدُكُمۡ أَن تَكُونَ لَهُۥ جَنَّةࣱ مِّن نَّخِيلࣲ وَأَعۡنَابࣲ تَجۡرِي مِن تَحۡتِهَا ٱلۡأَنۡهَٰرُ لَهُۥ فِيهَا مِن كُلِّ ٱلثَّمَرَٰتِ وَأَصَابَهُ ٱلۡكِبَرُ وَلَهُۥ ذُرِّيَّةࣱ ضُعَفَآءُ فَأَصَابَهَآ إِعۡصَارࣱ فِيهِ نَارࣱ فَٱحۡتَرَقَتۡۗ كَذَٰلِكَ يُبَيِّنُ ٱللَّهُ لَكُمُ ٱلۡأٓيَٰتِ لَعَلَّكُمۡ تَتَفَكَّرُونَ
Would any of you like to have a garden of palm trees and vines, graced with flowing streams and all kinds of produce, which, when you are afflicted with old age and feeble offspring, is struck by a fiery whirlwind and burnt down? In this way God makes His messages clear to you, so that you may reflect on them
Tafsīr
التفسير6 shownCommentary on the verses above, at most two editions per verse.
en-al-jalalayn on 16:70en-al-jalalayncommentary on an ayah this subject surfaced
And God has created you when you were nothing then He takes you in death when your terms of life are concluded; and there are some among you who are relegated to the most abject stage of life that is the most diminished because of old-age and senility so that he knows nothing after having possessed some knowledge. ‘Ikrima said ‘Whoever recites the Qur’ān will not come to such a predicament’. God is Knowing of how to manage the affairs of His creation Powerful in doing what He will.
en-tafisr-ibn-kathir on 16:70en-tafisr-ibn-kathircommentary on an ayah this subject surfaced
And Allah created you and then He will cause you to die; and among you there are some who are sent back to senility, so that they know nothing after having known (much). Truly, Allah is Knowing, capable of all things (70)
In Man there is a Lesson
Allah tells us that He is controlling the affairs of His servants. He is the One Who created them out of nothing, then He will cause them to die. But there are some of them that He allows to grow old, which is a physical weakness, as Allah says:
اللَّهُ الَّذِي خَلَقَكُم مِّن ضَعْفٍ ثُمَّ جَعَلَ مِن بَعْدِ ضَعْفٍ قُوَّةً
(Allah is He Who created you in (a state of) weakness, then gave you strength after weakness, then after strength gave (you) weakness)(30:54)
لِكَيْ لَا يَعْلَمَ بَعْدَ عِلْمٍ شَيْئًا
(so that they know nothing after having known.) meaning, after he knew things, he will reach a stage where he knows nothing because of weakn
en-asbab-al-nuzul-by-al-wahidi on 22:5en-asbab-al-nuzul-by-al-wahidicommentary on an ayah this subject surfaced
O people, if you are in doubt about the Uprising, surely We created you of dust, then of a sperm drop, then of a blood clot, then of a lump of flesh, fully created and not fully created, that We might make clear to you. The composition of the Adamic body in the first creation is a clear argument against the deniers of the Uprising. He is saying, “I am the Lord who created a body and figure with such comeliness, a stature and form with such beauty, from that feeble sperm drop in that firm settledness. He says, “Did We not create you of feeble water, then put it in a firm settledness?” [77:20-21]. If you ponder this body, you will find an exemplar of all the created and newly arrived things in the celestial and terrestrial worlds. Just as He arranged the seven spheres in heaven, so also He composed seven parts in this body-water and dust, and then flesh, skin, veins, sinews, and bones. Jus
en-al-jalalayn on 30:54en-al-jalalayncommentary on an ayah this subject surfaced
God is the One Who created you from a state of weakness from a ‘base fluid’ cf. Q. 328 then He ordained after a second weakness which is the weakness of the period of childhood strength that is the strength of youth then after strength He appointed weakness again and grey hair the weakness of old age and the grey hairs of decrepitude read vocalised as du‘f ‘weakness’ in all three places. He creates what He will of weakness and strength youth and grey hairs and He is the Knower of how to manage His creatures the Omnipotent.
en-tafisr-ibn-kathir on 30:54en-tafisr-ibn-kathircommentary on an ayah this subject surfaced
Allah is He Who created you in weakness, then gave you strength after weakness, then after strength gave (you) weakness and grey hair. He creates what He wills. And He is the All-Knowing, the All-Powerful (54)
The Different Stages of Man
Here Allah points out how man passes through different stages of creation, one phase after another. He is originally created from dust, then from a Nutfah, then from a clot, then from a lump of flesh. Then he becomes bones, then the bones are clothed with flesh, then the soul is breathed into him. Then he emerges from his mother's womb, weak and thin and powerless. Then he grows up little by little, until he becomes a child, then he reaches the stage of puberty, then he becomes a young man, which is strength after weakness. Then he starts to get older, reaching middle age, then old age and senility, weakness after strength, so he loses his resolve, pow
en-al-jalalayn on 22:5en-al-jalalayncommentary on an ayah this subject surfaced
O mankind in other words O people of Mecca if you are in doubt about the Resurrection then lo! consider that We have created you that is We have created your origin — Adam — from dust then We created his progeny from a drop a sperm-drop then from a clot congealed blood then from a little lump of flesh mudgha a piece of flesh the size of what one would be able to chew mā yumdagh partly formed shaped complete in form and partly unformed that is uncomplete in form that We may make clear to you the perfect nature of Our power that you might then infer from this initial act of creation the reality of its future restoration. And We establish nuqirru marks a new grammatically independent sentence in the wombs whatever We will for a specified time that is until the time for it to come out then We bring you forth from the bellies of your mothers as infants and then We extend your life that you ma
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376 to 400 of 1,184Allostatic load and ageing: linking the microbiome and nutrition with age-related health.
Ageing is a process of decline in physiological function and capability over time. It is an anticipated major burden on societal health-care costs due to an increasingly aged global population. Accelerated biological ageing is a feature of age-related morbidities, which also appear to share common underpinning features, including low-grade persistent inflammation, phosphate toxicity, diminished Nrf2 activity, a depleted metabolic capability, depressed mitochondrial biogenesis and a low diversity gut microbiome. Social, psychological, lifestyle and nutritional risk factors can all influence the trajectory of age-related health, as part of an individual's exposome, which reflects the interplay between the genome and the environment. This is manifest as allostatic (over)load reflecting the burden of lifestyle/disease at both a physiological and molecular level. In particular, age-related ge…
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Psychobiological factors of resilience and depression in late life.
In contrast to traditional perspectives of resilience as a stable, trait-like characteristic, resilience is now recognized as a multidimentional, dynamic capacity influenced by life-long interactions between internal and environmental resources. We review psychosocial and neurobiological factors associated with resilience to late-life depression (LLD). Recent research has identified both psychosocial characteristics associated with elevated LLD risk (e.g., insecure attachment, neuroticism) and psychosocial processes that may be useful intervention targets (e.g., self-efficacy, sense of purpose, coping behaviors, social support). Psychobiological factors include a variety of endocrine, genetic, inflammatory, metabolic, neural, and cardiovascular processes that bidirectionally interact to affect risk for LLD onset and course of illness. Several resilience-enhancing intervention modalities …
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Miquel S, Champ C, Day J, Aarts E, Bahr BA, Bakker M, Bánáti D, Calabrese V, Cederholm T, Cryan J, Dye L, Farrimond JA, Korosi A, Layé S, Maudsley S, Milenkovic D, Mohajeri MH, Sijben J, Solomon A, Spencer JPE, Thuret S, Vanden Berghe W, Vauzour D, Vellas B, Wesnes K, Willatts P, Wittenberg R, Geurts L (2018)reviewMEDLINE-indexed journal, not yet read by usAgeing research reviews119 citations Poor cognitive ageing: Vulnerabilities, mechanisms and the impact of nutritional interventions.
Background: Ageing is a highly complex process marked by a temporal cascade of events, which promote alterations in the normal functioning of an individual organism. The triggers of normal brain ageing are not well understood, even less so the factors which initiate and steer the neuronal degeneration, which underpin disorders such as dementia. A wealth of data on how nutrients and diets may support cognitive function and preserve brain health are available, yet the molecular mechanisms underlying their biological action in both normal ageing, age-related cognitive decline, and in the development of neurodegenerative disorders have not been clearly elucidated.
Objectives: This review aims to summarise the current state of knowledge of vulnerabilities that predispose towards dysfunctional brain ageing, highlight potential protective mechanisms, and discuss dietary interventions that may b…
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Impact of stress on aged immune system compartments: Overview from fundamental to clinical data.
Life expectancy is continuously increasing due to major progress in preventing, delaying or curing various pathologies normally encountered in old age. However, both scientific and medical advances are still required to understand underlying cause of the disparate comorbidities occurrence with aging. In one hand, aging profoundly impairs the immune system; it is characterized by many changes in haematopoiesis, adaptive and innate systems, associated with pro-inflammatory environment. In another hand, stressful events (acute or chronic) can also impact the immune system through the secretion of hormones, which are also altered with aging. The field of psychoneuroimmunology is now providing evidences that in acute medical conditions, elderly people are not equal in their responses to stressors depending on many extrinsic and intrinsic factors. These parameters could interfere with elderly'…
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Role of D-galactose-induced brain aging and its potential used for therapeutic interventions.
Aging is a phenomenon that all living organisms inevitably face. Every year, 9.9million people, globally, suffer from dementia, an indicator of the aging brain. Brain aging is significantly associated with mitochondrial dysfunction. This is characterized by a decrease in the activity of respiratory chain enzymes and ATP production, and increased free radical generation, mitochondrial deoxyribonucleic acid (DNA) mutations, and impaired mitochondrial structures. To get a better understanding of aging and to prevent its effects on many organs, chronic systemic administration of D-galactose was used to artificially create brain senescence in animal models and established to be beneficial for studies of anti-aging therapeutic interventions. Several studies have shown that D-galactose-induced brain aging which does so not only by causing mitochondrial dysfunction, but also by increasing oxidat…
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Oxidative Stress and Accelerated Aging in Neurodegenerative and Neuropsychiatric Disorder.
Background: Neurodegenerative diseases are becoming more and more common in today's world. As people are continuously being exposed to exogenous factors like UV radiations, gamma rays, X-Rays, environmental pollutants and heavy metals, the cases of increased oxidative damage are increasing. Even though some amount of oxidative damage occurs in all metabolic reactions but their increase from the normal level in organisms causes neurodegenerative diseases. These neurodegenerative disorders like Alzeimers, Parkinsons disease and neuropsychiatric disorders such as schizophrenia, bipolar, depression are caused due to the decline in physiological and psychological functions caused by ROS and RNS. These ROS and RNS are formed as the result of excess oxidative damage in the system.
Methods: The following article goes into detail explaining all the effects caused by excess oxidative damage like R…
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Saretzki G (2018)reviewMEDLINE-indexed journal, not yet read by usSub-cellular biochemistry85 citations Telomeres, Telomerase and Ageing.
Telomeres are specialised structures at the end of linear chromosomes. They consist of tandem repeats of the hexanucleotide sequence TTAGGG, as well as a protein complex called shelterin. Together, they form a protective loop structure against chromosome fusion and degradation. Shortening or damage to telomeres and opening of the loop induce an uncapped state that triggers a DNA damage response resulting in senescence or apoptosis. Average telomere length, usually measured in human blood lymphocytes, was thought to be a biomarker for ageing, survival and mortality. However, it becomes obvious that regulation of telomere length is very complex and involves multiple processes. For example, the "end replication problem" during DNA replication as well as oxidative stress are responsible for the shortening of telomeres. In contrast, telomerase activity can potentially counteract telomere shor…
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Chromosomal Processes in Mind-Body Medicine: Chronic Stress, Cell Aging, and Telomere Length.
Stress affects cellular aging and inflammatory and chromosomal processes, including telomere length, thereby potentially compromising health and facilitating disease onset and progression. Stress-related diseases and strategies to manage stress usually require integrative or behavioral therapeutic approaches that also operate on cellular levels. Mind-body medicine (MBM) uses the interaction between the mind, body, behavior, and the environment to correct physical and psychological malfunctions, thus ameliorating disease states and improving health. The relaxation response (RR) is a physiological opponent of stress and the stress response (SR) (i.e., fight-or-flight response), also invoking molecular anti-stress processes. Techniques that elicit the RR are at the core of practically all MBM interventions. We surmise that these techniques can also affect chromosomal and telomere processes,…
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The complexity of loneliness.
Loneliness is a prevalent and global problem for adult populations, and a number of different studies have linked it to multiple chronic conditions, including: heart disease, lung disease, cardiovascular disease, hypertension, atherosclerosis, stroke, and metabolic disorders, such as obesity and metabolic disease. Is a major predictor of psychological problems, such as depression, psychological stress, and anxiety. Loneliness is linked to overall morbidity and mortality in adult populations. But limited interventions have demonstrated long-term effectiveness in reducing loneliness in adults with these same chronic conditions. Our research of the extant literature addresses the following question: What evidence exists regarding the relationships between loneliness and health? We focus on recent findings with respect to the links between loneliness and health.
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Integration of multi-omics techniques and physiological phenotyping within a holistic phenomics approach to study senescence in model and crop plants.
The study of senescence in plants is complicated by diverse levels of temporal and spatial dynamics as well as the impact of external biotic and abiotic factors and crop plant management. Whereas the molecular mechanisms involved in developmentally regulated leaf senescence are very well understood, in particular in the annual model plant species Arabidopsis, senescence of other organs such as the flower, fruit, and root is much less studied as well as senescence in perennials such as trees. This review addresses the need for the integration of multi-omics techniques and physiological phenotyping into holistic phenomics approaches to dissect the complex phenomenon of senescence. That became feasible through major advances in the establishment of various, complementary 'omics' technologies. Such an interdisciplinary approach will also need to consider knowledge from the animal field, in p…
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Social Cognition through the Lens of Cognitive and Clinical Neuroscience.
Social cognition refers to a set of processes, ranging from perception to decision-making, underlying the ability to decode others' intentions and behaviors to plan actions fitting with social and moral, besides individual and economic considerations. Its centrality in everyday life reflects the neural complexity of social processing and the ubiquity of social cognitive deficits in different pathological conditions. Social cognitive processes can be clustered in three domains associated with (a) perceptual processing of social information such as faces and emotional expressions (social perception), (b) grasping others' cognitive or affective states (social understanding), and (c) planning behaviors taking into consideration others', in addition to one's own, goals (social decision-making). We review these domains from the lens of cognitive neuroscience, i.e., in terms of the brain areas …
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Hallmarks of Brain Aging: Adaptive and Pathological Modification by Metabolic States.
During aging, the cellular milieu of the brain exhibits tell-tale signs of compromised bioenergetics, impaired adaptive neuroplasticity and resilience, aberrant neuronal network activity, dysregulation of neuronal Ca2+ homeostasis, the accrual of oxidatively modified molecules and organelles, and inflammation. These alterations render the aging brain vulnerable to Alzheimer's and Parkinson's diseases and stroke. Emerging findings are revealing mechanisms by which sedentary overindulgent lifestyles accelerate brain aging, whereas lifestyles that include intermittent bioenergetic challenges (exercise, fasting, and intellectual challenges) foster healthy brain aging. Here we provide an overview of the cellular and molecular biology of brain aging, how those processes interface with disease-specific neurodegenerative pathways, and how metabolic states influence brain health.
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Diet, nutrition and the ageing brain: current evidence and new directions.
Globally populations are ageing. By 2050, it is estimated that there will be two billion people aged 60 years or over, of which 131 million are projected to be affected by dementia, while depression is predicted to be the second leading cause of disability worldwide by 2020. Preventing or delaying the onset of these disorders should therefore be a public health priority. There is some evidence linking certain dietary patterns, particularly the Mediterranean diet, with a reduced risk of dementia and depression. Specific dietary components have also been investigated in relation to brain health, with emerging evidence supporting protective roles for n-3 PUFA, polyphenols, vitamin D and B-vitamins. At this time, the totality of evidence is strongest in support of a role for folate and the metabolically related B-vitamins (vitamin B12, vitamin B6 and riboflavin) in slowing the progression of…
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Polyunsaturated fatty acids and endocannabinoids in health and disease.
Polyunsaturated fatty acids (PUFAs) are lipid derivatives of omega-3 (docosahexaenoic acid, DHA, and eicosapentaenoic acid, EPA) or of omega-6 (arachidonic acid, ARA) synthesized from membrane phospholipids and used as a precursor for endocannabinoids (ECs). They mediate significant effects in the fine-tune adjustment of body homeostasis. Phyto- and synthetic cannabinoids also rule the daily life of billions worldwide, as they are involved in obesity, depression and drug addiction. Consequently, there is growing interest to reveal novel active compounds in this field. Cloning of cannabinoid receptors in the 90s and the identification of the endogenous mediators arachidonylethanolamide (anandamide, AEA) and 2-arachidonyglycerol (2-AG), led to the characterization of the endocannabinoid system (ECS), together with their metabolizing enzymes and membrane transporters. Today, the ECS is know…
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Loneliness, social isolation and risk of cardiovascular disease in the English Longitudinal Study of Ageing.
Background There is increasing evidence of an association between social relationships and morbidity in general, and cardiovascular disease in particular. However, recent syntheses of the evidence raise two important questions: is it the perceived quality or the more objective quantity of relationships that matters most; and what are the implications of changes in relationships over time? In this study, we investigate the cumulative effects of loneliness and social isolation on incident cardiovascular disease. Design A secondary analysis of prospective follow-up data from the English Longitudinal Study of Ageing (ELSA). Methods To assess the association between social isolation or loneliness and incident cardiovascular disease, lagged values of exposure to loneliness and isolation were treated as time-varying variables in discrete time survival models controlling for potential confounder…
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Froy O (2018)reviewMEDLINE-indexed journal, not yet read by usThe Proceedings of the Nutrition Society23 citations Circadian rhythms, nutrition and implications for longevity in urban environments.
Presently, about 12% of the population is 65 years or older and by the year 2030 that figure is expected to reach 21%. In order to promote the well-being of the elderly and to reduce the costs associated with health care demands, increased longevity should be accompanied by ageing attenuation. Energy restriction, which limits the amount of energy consumed to 60-70% of the daily intake, and intermittent fasting, which allows the food to be available ad libitum every other day, extend the life span of mammals and prevent or delay the onset of major age-related diseases, such as cancer, diabetes and cataracts. Recently, we have shown that well-being can be achieved by resetting of the circadian clock and induction of robust catabolic circadian rhythms via timed feeding. In addition, the clock mechanism regulates metabolism and major metabolic proteins are key factors in the core clock mecha…
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Docosahexaenoic acid: one molecule diverse functions.
Docosahexaenoic acid (DHA, C22:6, ω-3) is a highly polyunsaturated omega-3 fatty acid. It is concentrated in neuronal brain membranes, for which reason it is also referred to as a "brain food". DHA is essential for brain development and function. It plays an important role in improving antioxidant and cognitive activities of the brain. DHA deficiency occurs during aging and dementia, impairs memory and learning, and promotes age-related neurodegenerative diseases, including Alzheimer's disease (AD). For about two decades, we have reported that oral administration of DHA increases spatial memory acquisition, stimulates neurogenesis, and protects against and reverses memory impairment in amyloid β peptide-infused AD rat models by decreasing amyloidogenesis and protects against age-related cognitive decline in the elderly. These results demonstrate a robust link between DHA and cognitive he…
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Adaptive Capacity: An Evolutionary Neuroscience Model Linking Exercise, Cognition, and Brain Health.
The field of cognitive neuroscience was transformed by the discovery that exercise induces neurogenesis in the adult brain, with the potential to improve brain health and stave off the effects of neurodegenerative disease. However, the basic mechanisms underlying exercise-brain connections are not well understood. We use an evolutionary neuroscience approach to develop the adaptive capacity model (ACM), detailing how and why physical activity improves brain function based on an energy-minimizing strategy. Building on studies showing a combined benefit of exercise and cognitive challenge to enhance neuroplasticity, our ACM addresses two fundamental questions: (i) what are the proximate and ultimate mechanisms underlying age-related brain atrophy, and (ii) how do lifestyle changes influence the trajectory of healthy and pathological aging?
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MicroRNA Regulation of Oxidative Stress-Induced Cellular Senescence.
Aging is a time-related process of functional deterioration at cellular, tissue, organelle, and organismal level that ultimately brings life to end. Cellular senescence, a state of permanent cell growth arrest in response to cellular stress, is believed to be the driver of the aging process and age-related disorders. The free radical theory of aging, referred to as oxidative stress (OS) theory below, is one of the most studied aging promoting mechanisms. In addition, genetics and epigenetics also play large roles in accelerating and/or delaying the onset of aging and aging-related diseases. Among various epigenetic events, microRNAs (miRNAs) turned out to be important players in controlling OS, aging, and cellular senescence. miRNAs can generate rapid and reversible responses and, therefore, are ideal players for mediating an adaptive response against stress through their capacity to fin…
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Daulatzai MA (2017)reviewMEDLINE-indexed journal, not yet read by usJournal of neuroscience research333 citations Cerebral hypoperfusion and glucose hypometabolism: Key pathophysiological modulators promote neurodegeneration, cognitive impairment, and Alzheimer's disease.
Aging, hypertension, diabetes, hypoxia/obstructive sleep apnea (OSA), obesity, vitamin B12/folate deficiency, depression, and traumatic brain injury synergistically promote diverse pathological mechanisms including cerebral hypoperfusion and glucose hypometabolism. These risk factors trigger neuroinflammation and oxidative-nitrosative stress that in turn decrease nitric oxide and enhance endothelin, Amyloid-β deposition, cerebral amyloid angiopathy, and blood-brain barrier disruption. Proinflammatory cytokines, endothelin-1, and oxidative-nitrosative stress trigger several pathological feedforward and feedback loops. These upstream factors persist in the brain for decades, upregulating amyloid and tau, before the cognitive decline. These cascades lead to neuronal Ca2+ increase, neurodegeneration, cognitive/memory decline, and Alzheimer's disease (AD). However, strategies are available to…
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Telomere shortening during aging: Attenuation by antioxidants and anti-inflammatory agents.
Telomeres are a repeated sequence -of bases found at the ends of chromosomes. In humans, this sequence is TTAGGG, which is repeated over 2000 times. Telomeres protect the ends chromosomes from fusion with nearby chromosomes, and allow effective replication of DNA. Each time a cell divides, 25-200 base pairs are lost from the terminal sequence of chromosomes. By becoming truncated during cell division, telomeres protect essential genes from being shortened and thus inactivated. In addition, telomeres are sensitive to inflammation and oxidative stress, which can further promote telomere shortening. Reduction in the length of telomeres leads to the cessation of cell division and thus cellular senescence and apoptosis. This review discusses evidence for the role of oxidative stress and inflammation in regulating the length of telomeres in mammalian cells during senescence. Evidence is presen…
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Contribution of neuroinflammation and immunity to brain aging and the mitigating effects of physical and cognitive interventions.
It is widely accepted that the brain and the immune system continuously interact during normal as well as pathological functioning. Human aging is commonly accompanied by low-grade inflammation in both the immune and central nervous systems, thought to contribute to many age-related diseases. This review of the current literature focuses first on the normal neuroimmune interactions occurring in the brain, which promote learning, memory and neuroplasticity. Further, we discuss the protective and dynamic role of barriers to neuroimmune interactions, which have become clearer with the recent discovery of the meningeal lymphatic system. Next, we consider age-related changes of the immune system and possible deleterious influences of immunosenescence and low-grade inflammation (inflammaging) on neurodegenerative processes in the normally aging brain. We survey the major immunomodulators and n…
matched on Aging (mesh)
Calder PC, Bosco N, Bourdet-Sicard R, Capuron L, Delzenne N, Doré J, Franceschi C, Lehtinen MJ, Recker T, Salvioli S, Visioli F (2017)reviewMEDLINE-indexed journal, not yet read by usAgeing research reviews325 citations Health relevance of the modification of low grade inflammation in ageing (inflammageing) and the role of nutrition.
Ageing of the global population has become a public health concern with an important socio-economic dimension. Ageing is characterized by an increase in the concentration of inflammatory markers in the bloodstream, a phenomenon that has been termed "inflammageing". The inflammatory response is beneficial as an acute, transient reaction to harmful conditions, facilitating the defense, repair, turnover and adaptation of many tissues. However, chronic and low grade inflammation is likely to be detrimental for many tissues and for normal functions. We provide an overview of low grade inflammation (LGI) and determine the potential drivers and the effects of the "inflamed" phenotype observed in the elderly. We discuss the role of gut microbiota and immune system crosstalk and the gut-brain axis. Then, we focus on major health complications associated with LGI in the elderly, including mental h…
matched on Aging (mesh)
Microglia across the lifespan: from origin to function in brain development, plasticity and cognition.
Microglia are the only immune cells that permanently reside in the central nervous system (CNS) alongside neurons and other types of glial cells. The past decade has witnessed a revolution in our understanding of their roles during normal physiological conditions. Cutting-edge techniques revealed that these resident immune cells are critical for proper brain development, actively maintain health in the mature brain, and rapidly adapt their function to physiological or pathophysiological needs. In this review, we highlight recent studies on microglial origin (from the embryonic yolk sac) and the factors regulating their differentiation and homeostasis upon brain invasion. Elegant experiments tracking microglia in the CNS allowed studies of their unique roles compared with other types of resident macrophages. Here we review the emerging roles of microglia in brain development, plasticity a…
matched on Aging (mesh)
Weight Gain in Women at Midlife: A Concise Review of the Pathophysiology and Strategies for Management.
Weight gain accompanied by an increased tendency for central fat distribution is common among women in midlife. These changes are a result of aging, decreasing estrogen levels after menopause, and other unique influences in menopausal women that interfere with the adoption of healthy lifestyle measures. Central obesity, in particular, results in several adverse metabolic consequences, including dysglycemia, dyslipidemia, hypertension, and cardiovascular disease. Given that cardiovascular disease is the leading cause of death in postmenopausal women, the importance of weight management in midlife cannot be overemphasized. In addition, weight gain in midlife contributes to other health risks including cancer, arthritis, mood disorders, and sexual dysfunction. It is imperative that primary care physicians screen midlife women for overweight/obesity and offer appropriate advice and referral.…
matched on Aging (mesh)