A Discussion of Mitochondrially Derived Peptide MOTS-c
A number of mitochondrially derived peptides are thought to have positive effects on cell function, though as for most of the approaches of this nature, it is unclear that it is any better than a structured exercise program. One of the better studied of these peptides is MOTS-c, which is itself upregulated by exercise - arguably one of a number of known exercise mimetics. Delivering signal molecules that are normally upregulated by exercise should in principle recapture some of the beneficial effects of exercise, but so far this line of development has yet to much improve on exercise itself.
Mitochondria are organ...
Source: Fight Aging! - February 22, 2023 Category: Research Authors: Reason Tags: Daily News Source Type: blogs
Alternative Approaches to the Treatment of Mitochondrial Aging at the SENS Research Foundation
The primary approach to the prevention and treatment of mitochondrial aging undertaken by the SENS Research Foundation is allotopic expression, putting backup copies of mitochondrial genes into the nuclear genome. This prevents mitochondrial DNA mutations from degrading mitochondrial function in ways that can become pathological. This isn't the only approach on the table, however, and here some of the others are outlined.
Mitochondrial mutations - and above all, large deletions in the mitochondrial DNA - accumulate in long-lived cells over our lifetime. And until we can do something to repair or bypass that proble...
Source: Fight Aging! - February 21, 2023 Category: Research Authors: Reason Tags: Daily News Source Type: blogs
Fight Aging! Newsletter, February 20th 2023
In this study, researchers stimulate the ghrelin receptor using a suitable small molecule for much of the lifespan of mice, and observe the results. The overall extension of life span is a quarter of that produced by calorie restriction, and so we might draw some conclusions from that as to the relative importance of hunger in the benefits resulting from the practice of calorie restriction or fasting. Interestingly, the short term weight gains observed in mice given this ghrelin receptor agonist in the past don't appear in this long term study, in which the controls are the heaver animals. This is possibly because the rese...
Source: Fight Aging! - February 19, 2023 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
SIRT3 Upregulation as a Basis for Improving Mitochondrial Function in the Aging Brain
SIRT3 beneficially affects mitochondrial function, and its upregulation is a calorie restriction mimetic strategy, since it mediates some of the benefits resulting from a lowered calorie intake. Given this, there is some interest in this as a basis for treatments for neurodegenerative conditions, in which loss of mitochondrial function in the brain is thought to be an important contribution to pathology. Mitochondria are the power plants of the cell, and the brain requires a great deal of energy to operate. So far, efforts to improve mitochondrial function in aged tissues by targeting the expressed levels of specific prote...
Source: Fight Aging! - February 13, 2023 Category: Research Authors: Reason Tags: Daily News Source Type: blogs
Fight Aging! Newsletter, February 13th 2023
This study investigated whether taller Polish adults live longer than their shorter counterparts. Data on declared height were available from 848,860 individuals who died in the years 2004-2008 in Poland. To allow for the cohort effect, the Z-values were generated. Separately for both sexes, Pearson's r coefficients of correlation were calculated. Subsequently, one way ANOVA was performed.
The correlation between adult height and longevity was negative and statistically significant in both men and women. After eliminating the effects of secular trends in height, the correlation was very weak (r = -0.0044 in men and ...
Source: Fight Aging! - February 12, 2023 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Targeting the Mitochondrial Unfolded Protein Response to Improve Mitochondrial Function
Every cell contains hundreds of mitochondria, generating chemical energy store molecules to power cellular biochemistry. Mitochondrial function declines with age, with evidence indicating that a disruption of quality control mechanisms such as mitophagy is the proximate cause. Underlying that are age-related changes in the expression of proteins involved in mitochondrial dynamics, the fusion and fission of mitochondria. Is it possible to significantly improve mitochondrial function by forcing an upregulation of quality control mechanisms? Approaches such as delivery of NAD+ precursors have yet to reliably improve on the ef...
Source: Fight Aging! - February 7, 2023 Category: Research Authors: Reason Tags: Daily News Source Type: blogs
Fight Aging! Newsletter, February 6th 2023
In conclusion, our study reveals that aging enhances atherosclerosis via increased inflammation of visceral fat. Our study suggests that future therapies targeting the visceral fat may reduce atherosclerosis diseaseburden in the expanding older population.
Is the Gut a Significant Source of Amyloid-β in Alzheimer's Disease?
https://www.fightaging.org/archives/2023/02/is-the-gut-a-significant-source-of-amyloid-%ce%b2-in-alzheimers-disease/
The early stages of Alzheimer's disease are characterized by rising levels of amyloid-β in the brain and the formation of misfolded amyloid aggregates. It is present...
Source: Fight Aging! - February 5, 2023 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Does Mitochondrial Dysfunction Meaningfully Contribute to the Development of Atherosclerosis?
Mitochondria are the power plants of the cell, producing the chemical energy store molecule ATP, but are also integrated into a wide range of fundamental cellular processes. Mitochondrial function declines with age, likely an important contribution to age-related declines in energy-hungry tissues such as the brain and muscles. It is also known that mitochondrial dysfunction can provoke chronic inflammation via the mislocation of mitochondrial DNA into parts of the cell where it will act as a damage-associated molecular pattern. This upregulation of inflammatory signaling is a reasonable proposal for the way in which mitoch...
Source: Fight Aging! - January 30, 2023 Category: Research Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs
Fight Aging! Newsletter, January 30th 2023
In conclusion, deletion of p16Ink4a cells did not negatively impact beta-cell mass and blood glucose under basal and HFD conditions and proliferation was restored in a subset of HFD mice opening further therapeutic targets in the treatment of diabetes.
Communication Between Blood and Brain in Aging and Rejuvenation
https://www.fightaging.org/archives/2023/01/communication-between-blood-and-brain-in-aging-and-rejuvenation/
As noted here, joining the circulatory systems of an old and young mouse results in some degree of rejuvenation in the old mouse. Where brain function is improved, researchers are inte...
Source: Fight Aging! - January 29, 2023 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Mitochondrial Dynamics Triggers Inflammation When Too Imbalanced in Either Direction
In this study, we provide evidence that mitochondrial dynamics also controls the activation of intracellular inflammatory pathways. Our conclusion is based on a number of observations, namely that: a) repression of the mitochondrial fusion proteins Mfn1 or Mfn2 induces mitochondrial fragmentation and TLR9-dependent NFκB activation; and b) Drp1 or Fis1 repression causes mitochondrial elongation and both NFκB-dependent and type I IFN inflammatory responses.
Given the role of mitochondrial dynamics in regulating mitochondrial function and mitophagy, it is conceivable that alterations in these processes could be invo...
Source: Fight Aging! - January 25, 2023 Category: Research Authors: Reason Tags: Daily News Source Type: blogs
Fight Aging! Newsletter, January 23rd 2023
This study explored the association between tap drinking water and longevity in Cilento, Italy, to understand whether trace elements in local drinking water may have an influence on old, nonagenarian, and centenarian people and promote their health and longevity.
Data on population and water sources were collected through the National Demographic Statistics, the Cilento Municipal Archives, and the Cilento Integrated Water Service. Ordinary least squares (OLS) regression and a geographically weight regression (GWR) model were used to study the spatial relationship between the explanatory and outcome variables of long...
Source: Fight Aging! - January 22, 2023 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Extracellular Matrix Stiffening Contributes to Cartilage Aging and Osteoarthritis
Age-related changes in the structure of the extracellular matrix that surrounds and supports cells are not as well studied as changes in cell behavior. Nonetheless, there is plenty of evidence for changes in the extracellular matrix to negatively affect tissue function. Cells create and maintain the matrix, but the state of the matrix in turn influences cells, and over time is affected by more than just cell behavior. Metabolic processes can alter and fragment elastin, cross-link collagen molecules, and so forth.
Cross-linking of matrix molecules occurs with age as a byproduct of the normal operation of metabolism, ...
Source: Fight Aging! - January 17, 2023 Category: Research Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs
Fight Aging! Newsletter, January 9th 2023
Fight Aging! publishes news and commentary relevant to the goal of ending all age-related disease, to be achieved by bringing the mechanisms of aging under the control of modern medicine. This weekly newsletter is sent to thousands of interested subscribers. To subscribe or unsubscribe from the newsletter,
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Longevity Industry Consulting Services
Reason, the founder of Fight Aging! and Repair Biotechnologies, offers strategic consulting services to investors, entrepreneurs, and others interested in the longevity industry and its complexities. To find out m...
Source: Fight Aging! - January 8, 2023 Category: Research Authors: Reason Tags: Newsletters Source Type: blogs
Improving Mitochondrial Complex I Function in Aged Tissues Might Be Achieved via Upregulation of Just a Few Component Proteins
Mitochondria are the power plants of the cell, several hundred working away in every cell to package the chemical energy store molecule adenosine triphosphate (ATP). At the heart of this energetic process taking place inside every mitochondrion is the electron transport chain, consisting of several complicated protein complexes, each made up of multiple subunit proteins that are manufactured from their genetic blueprints somewhat independently of one another.
Research into other complicated protein complexes, such as the proteasome, has shown that the relatively slow pace of production of one of the protein subunit...
Source: Fight Aging! - January 5, 2023 Category: Research Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs
Extracellular Mitochondria Have Some Ability to Selectively Target Tissues Experiencing Mitochondrial Dysfunction
Mitochondria can be ejected and taken up by cells, or transferred via connections between cells, and this appears to one of the many ways in which cells communicate or attempt to assist in cases of damage. It is of great interest to the research community that intracellular mitochondria can be taken up and used by cells, given the existence of inherited diseases resulting from mitochondrial mutations, and given the late life decline in mitochondrial function that contributes to many age-related conditions. It may be possible to deliver fully functional mitochondria as a therapy, to be ingested by cells in order to repair t...
Source: Fight Aging! - January 4, 2023 Category: Research Authors: Reason Tags: Medicine, Biotech, Research Source Type: blogs
