Summary: The BrainGate brain-machine interface is able to transmit signals from a single neuron resolution with full broadband fidelity without physically tethering the user to a decoding system.
Source: Brown University.
Brain-computer interfaces (BCIs) are an emerging assistive technology, enabling people with paralysis to type on computer screens or manipulate robotic prostheses just by thinking about moving their own bodies. For years, investigational BCIs used in clinical trials have required cables to connect the sensing array in the brain to computers that decode the signals and use them to drive external devices.
Gene editing has shown great promise as a non-heritable way to treat a wide range of conditions, including many genetic diseases and more recently, even COVID-19. But could a version of the CRISPR gene-editing tool also help deliver long-lasting pain relief without the risk of addiction associated with prescription opioid drugs?
In work recently published in the journal Science Translational Medicine, researchers demonstrated in mice that a modified version of the CRISPR system can be used to “turn off” a gene in critical neurons to block the transmission of pain signals [1]. While much more study is needed and the approach is still far from being tested in people, the findings suggest that this new CRISPR-based strategy could form the basis for a whole new way to manage chronic pain.
This novel approach to treating chronic pain occurred to Ana Moreno, the study’s first author, when she was a Ph.D. student in the NIH-supported lab of Prashant Mali, University of California, San Diego. Mali had been studying a wide range of novel gene-and cell-based therapeutics. While reading up on both, Moreno landed on a paper about a mutation in a gene that encodes a pain-enhancing protein in spinal neurons called NaV1.7.
Dr. Shawna Pandya MD, is a scientist-astronaut candidate with Project PoSSUM, physician, aquanaut, speaker, martial artist, advanced diver, skydiver, and pilot-in-training.
Dr. Pandya is also the VP of Immersive Medicine with the virtual reality healthcare company, Luxsonic Technologies, Director of the International Institute of Astronautical Sciences (IIAS)/PoSSUM Space Medicine Group, Chief Instructor of the IIAS/PoSSUM Operational Space Medicine course, Director of Medical Research at Orbital Assembly Construction (a company building the world’s first rotating space station providing the first artificial gravity habitat), clinical lecturer at the University of Alberta, podcast host with the World Extreme Medicine’s WEMCast series, Primary Investigator (PI) for the Shad Canada-Blue Origin student micro-gravity competition, member of the ASCEND 2021 Guiding Coalition, Life Sciences Team Lead for the Association of Spaceflight Professionals, sesional lecturer for the “Technology and the Future of Medicine,” course at the University of Alberta, and Fellow of the Explorers’ Club.
Dr. Pandya also serves as medical advisor to several space, medical and technology companies, including Mission: Space Food, Gennesys and Aquanauta, as well as the Jasper Dark Sky Festival Advisory Committee.
Dr. Pandya holds a Bsc degree in neuroscience from University of Alberta, a MSc in Space Studies from International Space University, an MD from University of Alberta, and a certification in entrepreneurship from the Graduate Studies Program at Singularity University.
“The axons of nerve cells function a bit like a railway system, where the cargo is essential components required for the cells to survive and function. In neurodegenerative diseases, this railway system can get damaged or blocked,” Tasneem Khatib, the study’s first author, explained in a statement. “We reckoned that replacing two molecules that we know work effectively together would help to repair this transport network more effectively than delivering either one alone, and that is exactly what we found.”
Most neurodegenerative diseases are caused by multiple genetic abnormalities, making them difficult to address with gene therapy targeted at single mutations. Astellas is working on a gene therapy that expresses two proteins, and a University of Cambridge team has shown that it holds promise in glau…
Harvard University researchers have identified the biological mechanism of how chronic stress impairs hair follicle stem cells, confirming long-standing observations that stress might lead to hair loss.
In a mouse study published in the journal Nature, the researchers found that a major stress hormone causes hair folliclestem cells to stay in an extended resting phase, without regenerating the hair follicle and hair. The researchers identified the specific cell type and molecule responsible for relaying the stress signal to the stem cells, and showed that this pathway can be potentially targeted to restore hair growth.
“My lab is interested in understanding how stress affects stem cell biology and tissue biology, spurred in part by the fact that everyone has a story to share about what happens to their skin and hair when they are stressed. I realized that as a skin stem cell biologist, I could not provide a satisfying answer regarding if stress indeed has an impact—and more importantly, if yes, what are the mechanisms,” said Ya-Chieh Hsu, Ph.D., the Alvin and Esta Star Associate Professor of Stem Cell and Regenerative Biology at Harvard and senior author of the study. “The skin offers a tractable and accessible system to study this important problem in depth, and in this work, we found that stress does actually delay stem cell activation and fundamentally changes how frequently hair follicle stem cells regenerate tissues.”
In a first, scientists have revealed that animal and human DNA can be plucked straight out of thin air. The development heralds a promising new scientific technique with possible applications for ecology, forensics, and medicine, according to a new study.
“For example, this technique could help us to better understand the transmission of airborne diseases such as COVID-19.”
The research team is working with partners in industry, including the company NatureMetrics, to see how the technique can be applied in other ways, the university said.
A handful of passports are already in the works, including two in Las Vegas. It is not yet clear if any Las Vegas businesses will limit access solely to vaccinated guests.
Las Vegas is no stranger to exclusive VIP lists, but there’s a new way of limiting guest access coming to town: vaccine passports.
These digital credential systems can show whether someone has been vaccinated against COVID-19 and can help businesses limit access to those who have been inoculated. The systems were designed to increase health and safety at various venues, but experts warn of pushback over concerns on privacy and personal choice.
“What we’re seeing throughout the pandemic is people guarding their personal rights, and I think a lot of people will find that intrusive in their day to day,” said Jonathan Day, an associate professor of hospitality and tourism management at Purdue University.
New data from Children’s National Hospital shows parental experience with a number of social determinants of health can ultimately impact brain development in utero, something researchers said should suggest future community health intervention among pregnant people. The data, published in JAMA Network Open, specifically found poorer brain development in fetuses among pregnant people with low socioeconomic status (SES), low educational attainment, and limited employment opportunity.
New data from Children’s National Hospital has found that social determinants of health like income, education, and occupation can impact fetal brain development, following that child into life.
As brain activity-dependent human genes are of great importance in human neuropsychiatric disorders we also examined the expression of these genes to postmortem RNAseq databases from patients suffering from various neurological and psychiatric disorders (Table 1). Datasets were chosen based on similarities in tissue processing and RNAseq methodology to our own protocol. We performed a PCA (Principal Component Analysis) of our fresh brain compared to postmortem brain from healthy, Parkinson’s, Schizophrenia, Huntington’s, and Autism brains for the top 500 brain activity-dependent genes that showed the greatest reduction in the healthy postmortem samples. The PCA revealed a significant separation between the 4 fresh samples and the postmortem samples, independent of whether or not the fresh tissue was from epileptic (high activity, H) or non-epileptic (low activity, L) brain regions (Fig. 2 J). This further demonstrates a selective reduction of activity-dependent genes in postmortem brain independent of whether the underlying tissue is electrically active or not.
The sudden removal of brain tissue from a living person in many ways mimics a catastrophic event that occurs with a hypoxic brain injury or a traumatic death with exsanguination. The human brain has high energy needs, estimated to be 10 times that of other tissues21. As a means to understand how the postmortem interval selectively affects some genes and not others in human neocortex, we performed RNAseq and histological analyses in cortical brain tissue as a function of time from 0–24 h at 24 °C in order to simulate a postmortem interval. Neuropathological examination of the tissue used for this study showed a normal-appearing cortical pattern with no histopathologic abnormalities. RNAseq analysis showed a loss of brain activity-dependent genes that were 3-times more prone to be degraded than expected by chance compared to more stable housekeeping genes (Table 2). The threshold to detect activity-dependent genes was related to the probability of being affected by the PMI. The higher the relative expression of the brain activity gene, the more it was enriched in the population of genes affected by the PMI. These findings confirm that genes involved in brain activity are more prone to degradation during the PMI.
One possible explanation for the selective loss of activity-dependent genes could relate to the stability of various cell populations during the simulated PMI. As a means to implicate specific cell populations that could be responsible for the reduction of genes during the simulated PMI we used a clustering algorithm as we have previously described9. We found that 1427 genes (71% known brain activity-dependent genes) could be clustered across the seven time points of the simulated PMI. For these clusters, we used AllegroMcode to identify two main clusters. One cluster of 317 rapidly declining genes was predicted to be neuronal and strongly overlapped with the activity-dependent genes. A second cluster of 474 genes was predicted to be glial, including astrocytes and microglia (Fig. 3A). Remarkably, as the neuronal cell cluster rapidly fell, there was a reciprocal and dramatic increase in the expression of the glial cell cluster (Fig. 3B).
Pfizer and BioNTech’s COVID-19 vaccine is 100% effective against the virus in children ages 12 to 15, the companies announced in a press release Wednesday.
In a placebo-controlled trial of 2260 adolescents, none of the participants who received the real vaccine developed COVID-19, the companies said.
