Researchers have used genome editing technology to reveal the role of a key gene in human embryos in the first few days of development. This is the first time that genome editing has been used to study gene function in human embryos, which could help scientists to better understand the biology of our early development.
The force gravity and physical activity put on our bones causes tiny tears in the membranes of the tiny cells that enable us to make or break down bone, scientists say. While that may sound bad, it’s actually a key piece of how the force we put on our bones helps keep them strong, they report.
New insights into the long-lasting effects of Fragile X syndrome on connections in the brain during early development highlight the importance of early detection and treatment.
Traditional cultural norms about gendered roles and femininity still matter for women’s choice of college major, according to new research. Researcher have shown how long-held cultural norms about femininity may contribute to ongoing gender segregation in academia, and to the college majors that women decide to pursue in particular.
Important processes that create mutations that cause cancer have been identified by researchers studying the genomes of more than 1,000 tumors. Many mutations in human cancers are caused by mistakes made by a repair mechanism or ‘DNA spellchecker’ rather than the actual damage to DNA caused by the environment. Sunlight and alcohol consumption increase the rate at which this happens, resulting in more mutations in the most important parts of our genomes, add the investigators.
The elicitation of powerful, HIV-blocking antibodies in cows in a matter of weeks — a process that usually takes years in humans — has now been described by researchers. The unexpected animal model is providing clues for important questions at a moment when new energy has infused HIV vaccine research.
Mutations that occur after conception play an important role in autism, suggests a new study of nearly 6,000 families, combining three genetic sequencing technologies.
Using musical cues to learn a physical task significantly develops an important part of the brain, according to a new study.
People who practiced a basic movement task to music showed increased structural connectivity between the regions of the brain that process sound and control movement.
The findings focus on white matter pathways — the wiring that enables brain cells to communicate with each other.
The study could have positive implications for future research into rehabilitation for patients who have lost some degree of movement control.
Thirty right-handed volunteers were divided into two groups and charged with learning a new task involving sequences of finger movements with the non-dominant, left hand. One group learned the task with musical cues, the other group without music.
After four weeks of practice, both groups of volunteers performed equally well at learning the sequences, researchers at the University of Edinburgh found.
Using MRI scans, it was found that the music group showed a significant increase in structural connectivity in the white matter tract that links auditory and motor regions on the right side of the brain. The non-music group showed no change.
Researchers hope that future study with larger numbers of participants will examine whether music can help with special kinds of motor rehabilitation programmes, such as after a stroke.
The interdisciplinary project brought together researchers from the University of Edinburgh’s Institute for Music in Human and Social Development, Clinical Research Imaging Centre, and Centre for Clinical Brain Sciences, and from Clinical Neuropsychology, Leiden University, The Netherlands.
The results are published in the journal Brain & Cognition.
Dr Katie Overy, who led the research team said: “The study suggests that music makes a key difference. We have long known that music encourages people to move. This study provides the first experimental evidence that adding musical cues to learning new motor task can lead to changes in white matter structure in the brain.”
Materials provided by University of Edinburgh. Note: Content may be edited for style and length.
For decades, HIV has successfully evaded all efforts to create an effective vaccine but researchers at The Scripps Research Institute (TSRI) and the La Jolla Institute for Allergy and Immunology (LJI) are steadily inching closer. Their latest study, published in the current issue of Immunity, demonstrates that optimizing the mode and timing of vaccine delivery is crucial to inducing a protective immune response in a preclinical model.
More than any other factors, administering the vaccine candidate subcutaneously and increasing the time intervals between immunizations improved the efficacy of the experimental vaccine and reliably induced neutralizing antibodies. Neutralizing antibodies are a key component of an effective immune response. They latch onto and inactive invading viruses before they can gain a foothold in the body and have been notoriously difficult to generate for HIV.
“This study is an important staging point on the long journey toward an HIV vaccine,” says TSRI Professor Dennis R. Burton, Ph.D, who is also scientific director of the International AIDS Vaccine Initiative (IAVI) Neutralizing Antibody Center and of the National Institutes of Health’s Center for HIV/AIDS Vaccine Immunology and Immunogen Discovery (CHAVI-ID) at TSRI. “The vaccine candidates we worked with here are probably the most promising prototypes out there, and one will go into people in 2018,” says Burton.
“There had been a lot of big question marks and this study was designed to get as many answers as possible before we go into human clinical trials,” adds senior co-author Shane Crotty, Ph.D., a professor in LJI’s Division of Vaccine Discovery. “We are confident that our results will be predictive going forward.”
HIV has faded from the headlines, mainly because the development of antiretroviral drugs has turned AIDS into a chronic, manageable disease. Yet, only about half of the roughly 36.7 million people currently infected with HIV worldwide are able to get the medicines they need to control the virus. At the same time, the rate of new infections has remained stubbornly high, emphasizing the need for a preventive vaccine.
The latest findings are the culmination of years of collaborative and painstaking research by a dozen research teams centered around the development, improvement, and study of artificial protein trimers that faithfully mimic a protein spike found on the viral surface. At the core of this effort is the CHAVI-ID immunogen working group, comprised of TSRI’s own William R. Schief, Ph.D., Andrew B. Ward, Ph.D., Ian A. Wilson, D.Phil. and Richard T. Wyatt, Ph.D., in addition to Crotty and Burton. This group of laboratories in collaboration with Darrell J. Irvine, Ph.D., professor at MIT, and Rogier W. Sanders, Ph.D., professor at the University of Amsterdam, provided the cutting-edge immunogens tested in the study.
The recombinant trimers, or SOSIPs as they are called, were unreliable in earlier, smaller studies conducted in non-human primates. Non-human primates, and especially rhesus macaques, are considered the most appropriate pre-clinical model for HIV vaccine studies, because their immune system most closely resembles that of humans.
“The animals’ immune responses, although the right kind, weren’t very robust and a few didn’t respond at all,” explains Colin Havenar-Daughton, Ph.D., a scientific associate in the Crotty lab. “That caused significant concern that the immunogen wouldn’t consistently trigger an effective immune response in all individuals in a human clinical trial.”
In an effort to reliably induce a neutralizing antibody response, the collaborators tested multiple variations of the trimers and immunization protocols side-by-side to determine the best strategy going forward. Crotty and Burton and their colleagues teamed up with Professor Dan Barouch, M.D., Ph.D., Director of the Center for Virology and Vaccine Research at Beth Israel Deaconess Medical Center, who coordinated the immunizations.
The design of the study was largely guided by what the collaborators had learned in a previous study via fine needling sampling of the lymph nodes, where the scientists observed follicular helper T cells help direct the maturation steps of antibody-producing B cells. Administering the vaccine subcutaneously versus the more conventional intramuscular route, and spacing the injection at 8 weeks instead of the more common 4-6 weeks, reliably induced a strong functional immune response in all animals.
Using an osmotic pump to slowly release the vaccine over a period of two weeks resulted in the highest neutralizing antibody titers ever measured following SOSIP immunizations in non-human primates. While osmotic pumps are not a practical way to deliver vaccines, they illustrate an important point. “Depending on how we gave the vaccine, there was a bigger difference due to immunization route than we would have predicted,” says Matthias Pauthner, a graduate student in Burton’s lab and the study’s co-lead author. “We can help translate what we know now into the clinic.”
If the recent Women’s March revealed anything, it’s that we have the power to stand up and demand change. Voices are meant to be heard, and it’s important to use them. Over the past century, there have been tons of amazing women who have dedicated their lives to supporting certain causes. Their work—whether through protests, social activism, or online campaigns—has made real change happen, ensuring that they leave the planet a better, more equal place. Here, ten women who fought for, and achieved, change.