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Archive for the ‘genetics’ category: Page 335

Dec 13, 2019

Humans are genetically hardwired to only live for 38 YEARS

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

Humans have a maximum natural lifespan of only 38 years, according to researchers, who have discovered a way to estimate how long a species lives based on its DNA.

Scientists at Australia’s national science agency have developed a genetic ‘clock’ computer model that they claim can accurately estimate how long different vertebrates are likely to survive — including both living and extinct species.

Continue reading “Humans are genetically hardwired to only live for 38 YEARS” »

Dec 12, 2019

Viewpoint: Rampage movie offers twisted take on CRISPR gene editing

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

Is a film based on a video game with fleeting mentions of a biotech buzzword compelling sci-fi? No. But I liked Rampage anyway.

The use of CRISPR to edit genes is perhaps the only novel plot point in this latest monster movie. An evil head of a biotech company subverts a scientist’s work to fashion a bioweapon that revs up the growth hormone gene, and more, in three unfortunate animals. Cue Godzilla, King Kong, and the beast in Lake Placid.

But the screenwriters seem to confuse gene editing with an infectious bioweapon, like anthrax. The tagline at IMDb reveals the befuddlement: “When three different animals become infected with a dangerous pathogen, a primatologist and a geneticist team up to stop them from destroying Chicago.” Infectious disease, genetic modification, or both?

Dec 12, 2019

By turning stem cells into brain cells, Aspen Neuroscience hopes to rewind the progress of Parkinson’s disease

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

The idea of a cell therapy for Parkinson’s disease starts out simple: Symptoms of the progressive disease are largely driven by the deaths of dopamine-producing neurons found deep within the brain. With lower levels of the neurotransmitter come the characteristic tremors, rigidity and slow movements.

By replacing those lost nerve cells with new dopamine producers, researchers hope to renew the brain’s connection to the body’s muscles and improve a person’s overall motor function.

But in the brain, everything becomes more complicated. On top of the risk of immune system rejection that comes with any kind of living tissue transplant, it’s important to make sure the implanted cells function correctly and do not pick up any dangerous genetic mutations as they grow.

Dec 11, 2019

The Greys

Posted by in category: genetics

O.,o.


Acknowledges the fact that the Greys are cross-breeding with human beings in an attempt to re-vitalize the genetic structure of their species.

Dec 11, 2019

Genetic brain disorder fixed in mice using precision epigenome editing

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

Using a targeted gene epigenome editing approach in the developing mouse brain, Johns Hopkins Medicine researchers reversed one gene mutation that leads to the genetic disorder WAGR syndrome, which causes intellectual disability and obesity in people. This specific editing was unique in that it changed the epigenome—how the genes are regulated—without changing the actual genetic code of the gene being regulated.

The researchers found that this gene, C11orf46, is an important regulator during . Specifically, it turns on and off the direction-sensing proteins that help guide the long fibers growing out of newly formed neurons responsible for sending electrical messages, helping them form into a bundle, which connects the two hemispheres of the brain. Failure to properly form this bundled structure, known as the , can lead to conditions such as , autism or other brain .

“Although this work is early, these findings suggest that we may be able to develop future epigenome editing therapies that could help reshape the neural connections in the brain, and perhaps prevent developmental disorders of the brain from occurring,” says Atsushi Kamiya, M.D., Ph.D., associate professor of psychiatry and at the Johns Hopkins University School of Medicine.

Dec 11, 2019

Eating more ketones may fight against Alzheimer’s disease

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

A ketone-supplemented diet may protect neurons from death during the progression of Alzheimer’s disease, according to research in mice recently published in JNeurosci.

Early in the development of Alzheimer’s disease, the brain becomes over excited, potentially through the loss of inhibitory, or GABAergic, interneurons that keep other neurons from signaling too much. Because interneurons require more energy compared to other neurons, they may be more susceptible to dying when they encounter the Alzheimer’s disease protein amyloid beta. Amyloid beta has been shown to damage mitochondria — the metabolic engine for cells — by interfering with SIRT3, a protein that preserves mitochondrial functions and protects neurons.

Cheng et al. genetically reduced levels of SIRT3 in mouse models of Alzheimer’s disease. Mice with low levels of SIRT3 experienced a much higher mortality rate, more violent seizures, and increased interneuron death compared to the mice from the standard Alzheimer’s disease model and control mice. However, the mice with reduced levels of SIRT3 experienced fewer seizures and were less likely to die when they ate a diet rich in ketones, a specific type of fatty acid. The diet also increased levels of SIRT3 in the mice.

Dec 11, 2019

Exclusive: Interview with US presidential candidate

Posted by in categories: economics, genetics, geopolitics, life extension, policy, robotics/AI, transhumanism

Last week, the transhumanist activist Zoltan Istvan announced his candidacy for President of the United States in next year’s elections. The writer, humanitarian and outspoken advocate of radical science is no stranger to the issues surrounding Longevity, and has spoken widely on subjects including AI, genetic editing, technology policy, and futurism.

In 2016, Istvan ran as an independent presidential candidate and travelled across the United States, spreading his message from a coffin-shaped bus, known as the “Immortality Bus.” This time he’s on the ballot, running against Donald Trump as a candidate for the Republican party in next year’s primaries. Things are a bit more serious this time.

Among his key policies, Istvan includes transhumanism, universal basic income and the need to beat China in the global innovation race – an issue we addressed in our Jamie Metzl interview. We spoke to him to find out more about his views on the Longevity sector.

Dec 10, 2019

Common Genetic Link Between Autism and Tourette’s Discovered – Brain Communication Impaired

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

Lancaster University researchers have discovered, for the first time, how a genetic alteration that increases the risk of developing Autism and Tourette’s impacts on the brain.

Their research also suggests that ketamine, or related drugs, may be a useful treatment for both of these disorders.

Autism affects an estimated 2.8 million people in the UK while Tourette’s Syndrome — a condition that causes a person to make involuntary sounds and movements called tics –affects an estimated 300,000 people in the UK. The treatments available for both disorders are limited and new treatments are urgently required. Recent research has also shown that these disorders are genetically linked.

Dec 10, 2019

Beneficial Viruses and the Human Virome — ideaXme — Dr. Jack Stapleton, MD, — University of Iowa College of Medicine — Ira Pastor

Posted by in categories: aging, bioengineering, biotech/medical, DNA, genetics, health, science, transhumanism

Dec 9, 2019

New bone healing mechanism has potential therapeutic applications

Posted by in categories: biotech/medical, genetics

Led by researchers at Baylor College of Medicine, a study published in the journal Cell Stem Cell reveals a new mechanism that contributes to adult bone maintenance and repair and opens the possibility of developing therapeutic strategies for improving bone healing.

“Adult bone repair relies on the activation of bone stem cells, which still remain poorly characterized,” said corresponding author Dr. Dongsu Park, assistant professor of molecular and human genetics and of pathology and immunology at Baylor. “Bone stem cells have been found both in the inside the bone and also in the periosteum—the outer layer of tissue—that envelopes the bone. Previous studies have shown that these two populations of stem cells, although they share many characteristics, also have unique functions and specific regulatory mechanisms.”

Of the two, periosteal stem cells are the least understood. It is known that they comprise a heterogeneous population of cells that can contribute to bone thickness, shaping and fracture repair, but scientists had not been able to distinguish between different subtypes of bone stem cells to study how their different functions are regulated.