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Category: biotech/medical – Page 1797

An international team of researchers has found that an ancient crocodile relative underwent body transitions as it evolved from a land to a sea creature before its ears changed to suit an underwater environment. In their paper published in Proceedings of the National Academy of Sciences, the group describes their in-depth study of thalattosuchia skulls and what they found.

Thalattosuchia was an ancient crocodile species that lived in the world’s oceans over 150 million years ago. But before that, they were land-dwelling. Prior research has shown that they took to water in a much slower fashion than other creatures like whales, existing as semi-aquatic creatures for many years before becoming full-fledged sea creatures. Study of their fossilized remains has shown their front legs evolving to become fins, and their back legs evolving into a fluked tail. Their bodies grew slimmer and sleeker to so they could glide smoothly through the water. And once they became sea creatures, their changed to suit the new environment. One such organ was the inner ear. And it was this organ that was the focus of this new work.

To learn more about the evolution of thalattosuchia’s , the researchers conducted CAT scans on over a dozen skull fossils. They focused most specifically on the inner ear structures used to maintain balance and equilibrium in land creatures.

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The common view of heredity is that all information passed down from one generation to the next is stored in an organism’s DNA. But Antony Jose, associate professor of cell biology and molecular genetics at the University of Maryland, disagrees.

In two new papers, Jose argues that DNA is just the ingredient list, not the set of instructions used to build and maintain a living organism. The instructions, he says, are much more complicated, and they’re stored in the that regulate a cell’s DNA and other functioning systems.

Jose outlined a new theoretical framework for heredity, which was developed through 20 years of research on genetics and epigenetics, in peer-reviewed papers in the Journal of the Royal Society Interface and the journal BioEssays. Both papers were published on April 22, 2020.

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When the researchers studied the patterns of aging-associated chemical tags called methyl groups, which serve as an indicator of a cell’s chronological age, they found that the treated cells appeared to be about 1½ to 3½ years younger on average than untreated cells from elderly people, with peaks of 3½ years (in skin cells) and 7½ years (in cells that line blood vessels).

The study found that inducing old human cells in a lab dish to briefly express these proteins rewinds many of the molecular hallmarks of aging and renders the treated cells nearly indistinguishable from their younger counterparts.

“When iPS cells are made from adult cells, they become both youthful and pluripotent,” says Vittorio Sebastiano, assistant professor of obstetrics and gynecology at Stanford University and senior author of the paper, published in Nature Communications.

“We’ve wondered for some time if it might be possible to simply rewind the aging clock without inducing pluripotency. Now we’ve found that, by tightly controlling the duration of the exposure to these protein factors, we can promote rejuvenation in multiple human cell types.”

Continue reading “Method turns back the clock on old human cells” | >

What do you think about.this?

Coronavirus patients taking hydroxychloroquine, a treatment touted by President Trump, were no less likely to need mechanical ventilation and had higher deaths rates compared to those who did not take the drug, according to a study of hundreds of patients at US Veterans Health Administration medical centers.

The study, which reviewed veterans’ medical charts, was posted Tuesday on medrxiv.org, a pre-print server, meaning it was not peer reviewed or published in a medical journal. The research was funded by the National Institutes of Health and the University of Virginia.

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THE HAGUE, Netherlands (AP) — All it took was a few sturdy swings with a sledgehammer and a prized painting by Vincent van Gogh was gone.

A Dutch crime-busting television show has aired security camera footage showing how an art thief smashed his way through reinforced glass doors at a museum in the early hours of March 30. He later hurried out through the museum gift shop with a Vincent van Gogh painting tucked under his right arm and the sledgehammer in his left hand.

Police hope that publicizing the images will help them track down the thief who stole Van Gogh’s “The Parsonage Garden at Nuenen in Spring 1884” from the Singer Laren Museum while it was shut down due to coronavirus containment measures.

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An artificial neural network can reveal patterns in huge amounts of gene expression data, and discover groups of disease-related genes. This has been shown by a new study led by researchers at Linköping University, published in Nature Communications. The scientists hope that the method can eventually be applied within precision medicine and individualised treatment.

It’s common when using social media that the platform suggests people whom you may want to add as friends. The suggestion is based on you and the other person having common contacts, which indicates that you may know each other. In a similar manner, scientists are creating maps of biological networks based on how different proteins or genes interact with each other. The researchers behind a new study have used artificial intelligence, AI, to investigate whether it is possible to discover biological networks using deep learning, in which entities known as “artificial neural networks” are trained by experimental data. Since artificial neural networks are excellent at learning how to find patterns in enormous amounts of complex data, they are used in applications such as image recognition. However, this machine learning method has until now seldom been used in biological research.

“We have for the first time used deep learning to find disease-related genes. This is a very powerful method in the analysis of huge amounts of biological information, or ‘big data’,” says Sanjiv Dwivedi, postdoc in the Department of Physics, Chemistry and Biology (IFM) at Linköping University.

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Chinese research i think.

Developing an effective universal influenza vaccine against influenza virus with highly conserved antigenic epitopes could induce a broad-spectrum immune response to prevent infection.

(An epitope, also known as antigenic determinant, is the part of an antigen that is recognized by the immune system, specifically by antibodies, B cells, or T cells. For example, the epitope is the specific piece of the antigen to which an antibody binds. See picture1)

Vaccination is the most effective way to prevent influenza virus infection. Current influenza vaccines are based on induction of protective antibodies against the viral surface hemagglutinin (HA) protein, which can effectively neutralize the influenza virus and significantly reduce morbidity and mortality. However, owing the variability of HA, vaccine strains need to be changed every year.

Continue reading “👽 Universal Vaccine, a consideration?” | >

This is pretty cool:

The vaccine targets the novel coronavirus’s Achilles’ heel, its Receptor Binding Motif (RBM), a critical structure that enables the virus to bind to and infect a target cell. According to Prof. Gershoni, the vaccine would reconstruct the coronavirus’s RBM, a tiny feature of its “spike” protein. Though the virus uses many different proteins to replicate and invade cells, the “spike” protein is the major surface protein that it uses to bind to a receptor — another protein that acts like a doorway into a human cell. After the spike protein binds to the human cell receptor, the viral membrane fuses with the human cell membrane, allowing the genome of the virus to enter human cells and begin infection.

Tel Aviv University’s Professor Jonathan Gershoni has been awarded a US patent for a novel coronavirus vaccine design.

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The virus is likely only to fuel the disaster preparedness industry in New Zealand and beyond. “Obviously the coronavirus is making people realize how vulnerable we all are, but what people are really concerned about is the aftermath,” said Vicino, the Vivos founder, who believes the wealthy fear an economic collapse or global depression could lead to uprisings against the top 1%. “They don’t want to have to defend their homes when the gangs of looters or marauders show up.”

Interest in New Zealand bunkers has surged.

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