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Aging biomarkers schema


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#91 cloudcell

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Posted 19 October 2014 - 05:10 PM

1) WikiPathways

Have a look at WikiPathways, which is "an open, public platform dedicated to the curation of biological pathways by and for the scientific community."

I searched the whole LongeCity and was somewhat surprised that no one has mentioned it here before. Wikipathways was started long ago -- back in 2007. 

 

Mirroring the "Aging biomarkers schema" at that platform might provide useful feedback from experts.

 

2) Digital Ageing Atlas

"The Digital Ageing Atlas (DAA) is a portal of age-related changes covering different biological levels. It integrates molecular, physiological, psychological and pathological age-related data to create an interactive portal that serves as the first centralized collection of human ageing changes and pathologies."

 

This database is open, as opposed to the "Integrated system of aging biomarkers," (see the previous post) which seems to be closed (correct me if I'm wrong). So DAA could be a good foundation for the aging map. 

 

I hope this thread is still alive.


Edited by crowdcell, 20 October 2014 - 03:07 AM.


#92 Danail Bulgaria

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Posted 20 October 2014 - 09:20 AM

1) WikiPathways

Have a look at WikiPathways, which is "an open, public platform dedicated to the curation of biological pathways by and for the scientific community."

I searched the whole LongeCity and was somewhat surprised that no one has mentioned it here before. Wikipathways was started long ago -- back in 2007. 

 

Mirroring the "Aging biomarkers schema" at that platform might provide useful feedback from experts.

 

2) Digital Ageing Atlas

"The Digital Ageing Atlas (DAA) is a portal of age-related changes covering different biological levels. It integrates molecular, physiological, psychological and pathological age-related data to create an interactive portal that serves as the first centralized collection of human ageing changes and pathologies."

 

This database is open, as opposed to the "Integrated system of aging biomarkers," (see the previous post) which seems to be closed (correct me if I'm wrong). So DAA could be a good foundation for the aging map. 

 

I hope this thread is still alive.

 

Thanks for the links! I liked very much the digital ageing atlas.

 



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#93 Avatar of Horus

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Posted 28 April 2015 - 02:53 AM

I am working on this more or less, currently mainly collecting new biomarkers info, for example I have found a new one, follistatin:

 

A mesenchymal stromal cell gene signature for donor age
Alves et al. 2012, http://www.ncbi.nlm....pubmed/22927939

Abstract
Human aging is associated with loss of function and regenerative capacity. Human bone marrow derived mesenchymal stromal cells (hMSCs) are involved in tissue regeneration, evidenced by their capacity to differentiate into several lineages and therefore are considered the golden standard for cell-based regeneration therapy. Tissue maintenance and regeneration is dependent on stem cells and declines with age and aging is thought to influence therapeutic efficacy, therefore, more insight in the process of aging of hMSCs is of high interest. We, therefore, hypothesized that hMSCs might reflect signs of aging. In order to find markers for donor age, early passage hMSCs were isolated from bone marrow of 61 donors, with ages varying from 17-84, and clinical parameters, in vitro characteristics and microarray analysis were assessed. Although clinical parameters and in vitro performance did not yield reliable markers for aging since large donor variations were present, genome-wide microarray analysis resulted in a considerable list of genes correlating with human age. By comparing the transcriptional profile of aging in human with the one from rat, we discovered follistatin as a common marker for aging in both species. The gene signature presented here could be a useful tool for drug testing to rejuvenate hMSCs or for the selection of more potent, hMSCs for cell-based therapy. (emphasis mine)

 

I am working also on some posts with more details related to this, it will be in the:

'Creating a unified theory of aging - Aging Theories - LONGECITY' topic,

http://www.longecity...heory-of-aging/



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#94 Avatar of Horus

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Posted 29 April 2015 - 06:14 PM

A recent finding:

Guess Your Age? 3D Facial Scan Beats Doctor's Exam
by Laura Geggel, Staff Writer   March 31, 2015 06:30am ET
http://www.livescien...arkers-age.html
 
It's no secret that most people accumulate wrinkles on their faces as they age. But now, a 3D analysis of those wrinkles and other signs of aging could reveal a person's age based on only an image of his or her face, a new study finds.
The researchers also found that levels of several biological markers in people's blood are associated with the markers of aging that appear on people's faces. For instance, women with older-looking faces tend to have higher levels of "bad" cholesterol, the researchers found.
"3D facial images can really tell your biological age," said the study's senior researcher Jing-Dong Han, a professor of computational biology at the Chinese Academy of Sciences and the Max Planck Partner Institute in Shanghai. "It's really more accurate than a physical exam."
In the study, the researchers used a special camera, called the 3dMDface System, to take 3D facial scans of 332 Chinese people. The scientists also collected blood samples from the participants, who ranged in age from 17 to 77 years old.

...

 

Three-dimensional human facial morphologies as robust aging markers
Chen et al. Cell Research , (31 March 2015) | doi:10.1038/cr.2015.36
http://www.ncbi.nlm....pubmed/25828530



#95 Avatar of Horus

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Posted 18 September 2015 - 09:47 AM

two papers about two biomarkers:

Beta-galactosidase
...
A biomarker that identifies senescent human cells in culture and in aging skin in vivo
Dimri et al. 1995
http://www.ncbi.nlm..../pubmed/7568133
...
Ink4a/Arf expression is a biomarker of aging
Krishnamurthy et al. 2004
http://www.ncbi.nlm....pubmed/15520862



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#96 HighDesertWizard

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Posted 24 September 2015 - 02:53 PM

The Quantified Body Blog does a podcast interview with Dr. Jun Yoon, "the man behind the Palo Alto Longevity Prize. I found the interview very worthwhile.

 

"A $500,000 Homeostatic Capacity Prize will be awarded to the first team to demonstrate that it can restore homeostatic capacity (using heart rate variability as the surrogate measure) of an aging reference mammal to that of a young adult."

 

Thoughts...

  • I like Dr. Yoon's distinction between achieving a state of Homeostasis via a drug/supplement and restoring Homeostatic Capacity. I  believe he makes a strong argument for the value of the Heart Rate Variability (HRV) Biomarker.
  • I've frequently posted on the HRV Biomarker and the only problem I have with the interview is that Dr. Yoon has dramatically understated the case for the HRV Biomarker in that it IS the Biomarker that has a causation Relationship with NF-kB Inhibition and, at the very least, a Correlation relationship with Telomerase expression.

More than that, Higher HRV has already been shown In Human Studies be correlated with Longevity... We already have 1 study demonstrating it's relevance In Human Survival Curves...

 

The text below In Italics are excerpts from the Opening Post of the NF-kB and Telomerase thread...

 

Here’s the study context... Take a known, Human, Surrogate Marker for Health, it’s a Computed Statistic... Measure this marker for 24 hours in old, wild-type Humans, 65 years old and up with a mean of 73 years… Wait 10 years… 53% of the 347 study animals are now dead... Do some statistical analysis of that surrogate marker data and plot the two survival curves below… That marker, Heart Rate Variability (HRV), has profound implications for human health and longevity... Here’s a link to this study from 1998...

d8RicwD.png

<< SNIP >>

 

2 - Evidence about HRV and its inverse correlation with NF-kB Transcription Activation

Establishing this evidence is basic physiology and biology research and has been the lifework of Karolinska Institute Honorary Doctorate Kevin Tracey, participant in 440+ studies per ResearchGate.
— Heart Rate Variability (HRV) is simultaneously increased with intracellular NF-kB Transcription Inhibition, especially in the Spleen, both via a Vagal-Cholinergic Anti-Inflammatory Pathway (CAIP) mechanism (http://tinyurl.com/nogth6b).
— I recommend two additional study summaries to get a handle on the basic physiology/biology research that Tracey has spearheaded. (http://tinyurl.com/k7r7vzx and http://tinyurl.com/njy4kl6)

— I have been following the Vagus-HRV-CAIP science for a while now and have posted about it here.
 

<< SNIP >>

 

6 – Evidence about HRV, telomere length, telomerase, and NF-kB

Elissa Epel’s
[and Elizabeth Blackburns's] life work asks the questions that lead, inexorably, to the conclusion that the larger Longevity Benefit Mechanism underlying NF-kB Inhibition, measured by its HRV surrogate marker, is the same as that for Telomerase Expression. Her work demonstrates at least two things…
— Meditation, among other Techniques Promoting “Positive Cognition,” increases, both, HRV and telomerase expression. (http://tinyurl.com/pqsh6ae)
— Chronic Stress (i.e., Autonomic Ill Health, aka Lower HRV) shortens Telomeres (http://tinyurl.com/nrawp9w).
— Meanwhile, Fredrickson has also found that Positive Emotions increase HRV (http://tinyurl.com/bxqwyym). And in another study, Fredrickson and Cole found that individuals with Eudaimonic Intent (aka, Noble Intent, a type of Positive Cognition (Emotion) that contrasts with Hedonic Intent) have reduced NF-kB expression in their peripheral blood (http://tinyurl.com/pzuupxu).
— It’s a puzzling thing that Epel, Fredrickson, and Cole have not yet referenced Kevin Tracey’s work...

 

It's a puzzling thing... Does Dr. Yoon know that Higher HRV has a coincident causal relationship with NF-kB Transcription Inhibition via the Cholinergic Anti-Inflammatory Pathway? He provides no hint in the interview that he does...


Edited by HighDesertWizard, 24 September 2015 - 02:58 PM.


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