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Category: biotech/medical – Page 910

Yes, Aging Backwards Is Possible. Here’s How to Do It

Silicon Valley tech bro Bryan Johnson claims he’s shaved five years off his biological age. Longevity mastermind David Sinclair, Ph.D., says tests show his biological age is a full decade younger than the 53 candles on his birthday cake. Sixty-three-year-old functional medicine doctor Mark Hyman, M.D., say tests clock his biological age at a young 43. But can aging really be cured? Maybe not—but adopting or eschewing certain lifestyle habits to add years to your life.

When it comes to understanding how to reverse aging, there are tests on the market that claim to be able to help you do that. They calculate your ‘biological age’ to see how your body could be aging across various cell-level metrics versus the number of candles on your birthday cake.

But are these tests accurate?

Researchers describe ‘nanoclays,’ an innovative addition to tools for chemists

Microscopic materials made of clay, designed by researchers at the University of Missouri, could be key to the future of synthetic materials chemistry. By enabling scientists to produce chemical layers tailor-made to deliver specific tasks based on the goals of the individual researcher, these materials, called nanoclays, can be used in a wide variety of applications, including the medical field or environmental science.

A paper describing this research is published in the journal ACS Applied Engineering Materials.

A fundamental part of the material is its electrically charged surface, said Gary Baker, co-principal investigator on the project and an associate professor in the Department of Chemistry.

New ALS Therapeutic Strategy Targets mRNA and Protein Distribution

Maintenance of mRNA and protein localization in motor neurons is a potential therapeutic avenue for Amyotrophic lateral sclerosis (ALS), report researchers from The Francis Crick Institute and the University College London (UCL). A new study shows how the extensive changes in mRNA and protein in ALS motor neurons are linked to mutations in an ATPase called VCP. These mutations may contribute to the mislocalization of RNA binding proteins (RBPs) that tend to clump together and the redistribution of the mRNAs they are bound to. Inhibition of VCP partly restored mRNA and protein localization and other ALS phenotypes. These results show how RBP mislocalization and mRNA redistribution in motor neurons are linked to ALS and how VCP inhibition could be used as a treatment.

The study “Nucleocytoplasmic mRNA redistribution accompanies RNA binding protein mislocalization in ALS motor neurons and is restored by VCP ATPase inhibition” was published today in Neuron.

“For the patients I see, it’s devastating that there aren’t yet impactful treatments available for ALS,” said Rickie Patani, PhD, senior group leader of the Human Stem Cells and Neurodegeneration Laboratory at the Crick, professor at UCL, and consultant neurologist at the National Hospital for Neurology. “This research represents a shift in our thinking about what causes ALS—it doesn’t involve abnormal movement of just a few proteins, but the abnormal localization of hundreds of proteins and mRNAs. This opens new avenues for research and potential therapies.

Dr Google? AI could be doctor in the pocket, but company’s health officer urges caution about its limits

I expect this to double over at least 2 maybe 3 times between now and 2030. AND, we here need to back it at every step if we really want indefinite life extension. Time to pick a side is right now.

The arrival of artificial intelligence into healthcare means everyone could one day have a doctor in their pocket, but Google’s chief health officer has urged caution about what AI can do and what its limits should be.

“There’s going to be an opportunity for people to have even better access to services, [and] to great quality services,” Dr Karen DeSalvo told Guardian Australia in an interview last week.

A Common Probiotic Could Boost Brain Health in Older Adults

It’s said the way to one’s heart is through the stomach, but it looks like the way to a healthy brain is by dropping a deuce regularly. According to new research presented at the Alzheimer’s Association International Conference in Amsterdam this week, chronic constipation appears to be linked to worsening cognitive abilities, likely due to an imbalance of gut bacteria causing inflammation.

While the study has yet to be peer-reviewed, it emphasizes a link between cognition and the microbiome — microorganisms like bacteria, viruses, and fungi living rent-free in and on our bodies — that hasn’t gone unnoticed. There’s still a whole lot we don’t know about the microbiome, but what we do know suggests these microscopic houseguests can be manipulated to improve our own health.

To offset cognitive decline, it could be as simple as a daily probiotic, says Mashael Aljumaah, a doctoral student at the University of North Carolina at Chapel Hill (UNC) and North Carolina State University. In findings presented Monday at the American Society for Nutrition in Boston, Aljumaah and her colleagues at UNC and Kent State University in Ohio found that for older adults, a daily probiotic containing gut-friendly Lactobacillus rhamnosus helped improve mild cognitive impairment by resetting the imbalance in gut bacteria.

Transplant of fresh brain cells replaces diseased and aged ones

Researchers have transplanted cells capable of forming specialized brain support cells into mice brains and found that they not only competed with and replaced unhealthy cells but aged ones, too. The findings open the door to developing an effective treatment for a range of conditions like multiple sclerosis, ALS, Alzheimer’s disease, autism and schizophrenia.

‘Glial cells’ is an umbrella term for the cells that are a support system to nerve cells (neurons). Progenitor cells are descendants of stem cells that can differentiate into specific cell types, and, in the case of glial cells, human glial progenitor cells (hGPCs) differentiate into subtypes, including astrocytes and oligodendrocytes, specialized for particular functions.

Astrocytes comprise most of our central nervous system cells, providing support and protection for neurons, transporting nutrients and removing waste. Oligodendrocytes lay down and maintain the lipid-rich, insulating wrapping called myelin around some axons, the part of the neuron that connects with another neuron and allows the transmission of nerve impulses.

Distinguished Lecture Series | Why life began with RNA | Trivedi School of Biosciences

This video, which is a part of the Distinguished Lecture Series by Trivedi School of Biosciences, Ashoka University, Prof. Jack W. Szostak discusses why life began with RNA. Why was Ribose sugar chosen in the primordial soup, and not several other alternative sugars that may have been available? He shows this using elegant experiments that include chemistry and structural biology.

Distinguished Speaker: Prof. Jack W. Szostak.
2009 Nobel Laureate in Physiology or Medicine.

#structuralbiologylecture #nobellaureate #medicine

Robot made of LEGOs produces DNA machines

A team of ingenious bioengineers at Arizona State University (ASU) has harnessed the power of childhood nostalgia, unveiling a creative solution to a long-standing challenge in DNA origami research.

They’ve successfully employed a LEGO robotics kit to build an affordable, highly effective gradient mixer for purifying self-assembling DNA origami nanostructures. This innovative breakthrough, detailed in a paper published one PLOS ONE, promises to revolutionize how scientists approach DNA origami synthesis.

The creation of DNA origami structures is an intricate process, requiring precise purification of nanostructures. Traditionally, this purification step involved rate-zone centrifugation, relying on a costly piece of equipment called a gradient mixer. However, the maverick minds at ASU have demonstrated that even the iconic plastic bricks of LEGO can be repurposed for scientific advancement.

Russ Hurlburt — What is Consciousness?

Watch more interviews on the mystery of consciousness: https://t.ly/zGDTU

Consciousness is what we can know best and explain least. It is the inner subjective experience of what it feels like to see red or smell garlic or hear Beethoven. Consciousness has intrigued and baffled philosophers. To begin, we must define and describe consciousness. What to include in a complete definition and description of consciousness?

Free access to Closer To Truth’s library of 5,000 videos: https://closertotruth.com/

Support the show with Closer To Truth merchandise: https://bit.ly/3P2ogje.

Russ Hurlburt is a professor of psychology at the University of Nevada, Las Vegas. He received his PhD in clinical psychology from the University of South Dakota.

Register for free at CTT.com for subscriber-only exclusives: https://bit.ly/3He94Ns.

Continue reading “Russ Hurlburt — What is Consciousness?” | >

Natural Compounds That Target DNA Repair Pathways and Their Therapeutic Potential to Counteract Cancer Cells

Resistance to current cancer treatments is an important problem that arises through various mechanisms, but one that stands out involves an overexpression of several factors associated with DNA repair. To counteract this type of resistance, different drugs have been developed to affect one or more DNA repair pathways, therefore, to test different compounds of natural origin that have been shown to induce cell death in cancer cells is paramount. Since natural compounds target components of the DNA repair pathways, they have been shown to promote cancer cells to be resensitized to current treatments. For this and other reasons, natural compounds have aroused great curiosity and several research projects are being developed around the world to establish combined treatments between them and radio or chemotherapy. In this work, we summarize the effects of different natural compounds on the DNA repair mechanisms of cancer cells and emphasize their possible application to re-sensitize these cells.

Day by day we are exposed to chemical carcinogens in the environment, ultraviolet (UV) radiation, ionizing radiation, and also those substances produced in our body during cellular metabolism that attack and produce a variety of DNA injuries. Each lesion favors the development of alterations in DNA and chromosomes, which favors oncogenic transformation and tumor progression. In order to reduce the number of changes in the genome and its instability, cells have several pathways of response to damage and DNA repair proteins that eliminate these lesions. DNA adducts, such as those created by alkylating agents, can be cleaved and repaired by base excision repair (BER) or by nucleotide excision repair (NER), depending on whether it is necessary to remove only a nitrogenous base or a nucleotide. Also, O-6-methylguanine-DNA methyltransferase (MGMT), an alkyltransferase, eliminates alkylations.