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Archive for the ‘genetics’ category: Page 118

Mar 23, 2023

Telomere shortening—a sign of cellular aging—linked to signs of Alzheimer’s in brain scans

Posted by in categories: biotech/medical, genetics, life extension, neuroscience

Changes in the brain caused by Alzheimer’s disease are associated with shortening of the telomeres—the protective caps on the ends of chromosomes that shorten as cells age—according to a new study led by Anya Topiwala of Oxford Population Health, part of the University of Oxford, UK, published March 22 in the open-access journal PLOS ONE.

Telomeres on chromosomes protect DNA from degrading, but every time a cell divides, the telomeres lose some of their length. Short telomeres are a sign of stress and cellular aging, and are also associated with a higher risk of neurological and psychiatric disorders. Currently, little is known about the links between and changes that occur in the brains of people with neurological conditions. Understanding those relationships could offer insights into the biological mechanisms that cause neurodegenerative disorders.

In the new study, researchers compared telomere length in to results from brain MRIs and from more than 31,000 participants in the UK Biobank, a large-scale biomedical database and research resource containing anonymized genetic, lifestyle and from half a million UK participants.

Mar 21, 2023

NAD Test #3: Impact of 1000 mg NMN/d?

Posted by in categories: biotech/medical, genetics

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Use Code: ConquerAging At Checkout.

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Mar 20, 2023

Biologists Figured Out How to Generate New Neurons in the Adult Brain, Revolutionizing Neurodegenerative Disease Research

Posted by in categories: biotech/medical, genetics, neuroscience

Recently biologists discovered how to generate new neurons in the adult brain. This is an incredible breakthrough that has enormous potential to revolutionize neurodegenerative disease research. By generating genetically-mutated mice with a unique gene that activates dormant neural stem cells, scientists were able to generate new neurons in the brain. For years, scientists have been searching for ways to promote the growth of new neurons in the brain, especially in individuals with neurodegenerative diseases such as Alzheimer’s and Parkinson’s. This new discovery could lead to new treatments and therapies that could help to restore brain function and improve the quality of life for millions of people around the world.

Leslie Samuel, founder of Interactive Biology, gives some context for the importance of genetic trading between organisms for scientific research, and notes how the loss of nerve cells in the brain is one of the hallmarks of neurodegenerative diseases. The ability to generate new neurons in the adult brain could be a game-changer in the field of neurology.

Leslie’s Thoughts

Mar 19, 2023

Dr Katcher’s E5 Lifespan Experiment Final Result | 22% Lifespan Extension

Posted by in categories: biotech/medical, genetics, life extension

So, 22% increase. Roughly like a 120 person, which means if this literally translates to people it means a maximizing of our current lifespan. The rest is just a rundown of Aubrey’s experiment.


Dr Katcher’s lifespan experiment has come to an end as the last remaining rat, Sima, has died. She was 1,464 days old which is a record for Sprague-Dawley rats. We also talk about the exciting Robust Mouse Rejuvenation project at the LEV Foundation.

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Mar 19, 2023

Blood Test #2 in 2023: Impact of NMN?

Posted by in categories: biotech/medical, genetics

Join us on Patreon! https://www.patreon.com/MichaelLustgartenPhD

Discount Links:
NAD+ Quantification: https://www.jinfiniti.com/intracellular-nad-test/
Use Code: ConquerAging At Checkout.

Continue reading “Blood Test #2 in 2023: Impact of NMN?” »

Mar 18, 2023

Gene-edited rice may be able to grow on Mars

Posted by in categories: biotech/medical, food, genetics

😗


Martian soil is generally poor for growing plants, but researchers have used CRISPR to create gene-edited rice that might be able to germinate and grow despite the hostile habitat.

By Leah Crane

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Mar 17, 2023

Scientists restore sight in mice using a new gene-editing technique

Posted by in categories: biotech/medical, genetics

The research team used a new CRISPR-based genome editing system named PESpRY.

Scientists in China have effectively treated retinitis pigmentosa.

The research team utilized a novel form of CRISPR-based genome editing that is exceptionally adaptable and could potentially remedy numerous genetic mutations responsible for causing different diseases.

Mar 17, 2023

CRISPR Gene-Editing Technique Reverses Vision Loss in Mice

Posted by in categories: bioengineering, biotech/medical, genetics

Summary: Using a highly versatile form of CRISPR gene editing, researchers successfully restored vision in mice with retinitis pigmentosa.

Source: Rockefeller University Press.

Researchers in China have successfully restored the vision of mice with retinitis pigmentosa, one of the major causes of blindness in humans.

Mar 17, 2023

New gene-editing technique reverses vision loss in mice

Posted by in categories: biotech/medical, genetics, neuroscience

Researchers in China have successfully restored the vision of mice with retinitis pigmentosa, one of the major causes of blindness in humans. The study, to be published March 17 in the Journal of Experimental Medicine, uses a new, highly versatile form of CRISPR-based genome editing with the potential to correct a wide variety of disease-causing genetic mutations.

Researchers have previously used genome editing to restore the vision of mice with , such as Leber , that affect the , a layer of non-neuronal cells in the eye that supports the light-sensing rod and cone photoreceptor cells. However, most inherited forms of blindness, including , are caused by in the neural photoreceptors themselves.

“The ability to edit the genome of neural retinal cells, particularly unhealthy or dying photoreceptors, would provide much more convincing evidence for the potential applications of these genome-editing tools in treating diseases such as retinitis pigmentosa,” says Kai Yao, a professor at the Wuhan University of Science and Technology.

Mar 16, 2023

The Impact of Ions on DNA

Posted by in categories: biotech/medical, computing, genetics, health

A study of the electron excitation response of DNA to proton radiation has elucidated mechanisms of damage incurred during proton radiotherapy.

Radiobiology studies on the effects of ionizing radiation on human health focus on the deoxyribonucleic acid (DNA) molecule as the primary target for deleterious outcomes. The interaction of ionizing radiation with tissue and organs can lead to localized energy deposition large enough to instigate double strand breaks in DNA, which can lead to mutations, chromosomal aberrations, and changes in gene expression. Understanding the mechanisms behind these interactions is critical for developing radiation therapies and improving radiation protection strategies. Christopher Shepard of the University of North Carolina at Chapel Hill and his colleagues now use powerful computer simulations to show exactly what part of the DNA molecule receives damaging levels of energy when exposed to charged-particle radiation (Fig. 1) [1]. Their findings could eventually help to minimize the long-term radiation effects from cancer treatments and human spaceflight.

The interaction of radiation with DNA’s electronic structure is a complex process [2, 3]. The numerical models currently used in radiobiology and clinical radiotherapy do not capture the detailed dynamics of these interactions at the atomic level. Rather, these models use geometric cross-sections to predict whether a particle of radiation, such as a photon or an ion, crossing the cell volume will transfer sufficient energy to cause a break in one or both of the DNA strands [46]. The models do not describe the atomic-level interactions but simply provide the probability that some dose of radiation will cause a population of cells to lose their ability to reproduce.