Science Rehashed Science Rehashed Inc.

Imagine having a telescope that could allow you to see whether a syndrome will manifest in the future. Imagine being able to use it to cure diseases before they can even occur. For Dr. Thomas McElrath, MD-PhD in the Division of Maternal-Fetal Medicine at the Brigham & Women’s Hospital, this telescope exists and is called LIFECODES. The LIFECODES Biobank is an extensive biobank of samples collected for over 14 years with data on over 6,000 pregnancies. It is used to look at biomarkers associated with pregnancy complications and the effects of environmental exposures on pregnancy outcomes. In this episode, we have interviewed Dr. McElrath to talk about his recent work published in Nature. He has leveraged these data to shed light on normal pregnancy progression to uncover new biomarkers that can be used to diagnose syndromes months before clinical presentation.

 “Zenyatta is my Spirit Animal and Hyacinths’’ music composition administered by Rukudzo © 2022 Rukudzo Kanyemba. All rights reserved.

We do not often think about our past as a species. What are the changes that made us like we are now? When, where, and why did these changes happen? Can we go back in history and find the answers to these questions? Archaeologists reconstruct human behavior in the past, mainly using things that people left behind, or this is what they used to do. In recent years, the possibility to study ancient DNA has revolutionized our way of looking at the past. Ancient DNA allows us to explore human diversity in different places and times and understand what factors shaped it, revealing mysteries about our history. We have interviewed Mary E. Prendergast, Assistant Professor of Anthropology at Rice University and a leader of one of the largest-scale studies of ancient DNA in Africa. Listen to this episode to find out how Dr. Prendergast and her team could use ancient DNA from individuals who lived between 18,000-400 years ago to explore how people interacted as far back as the last 80,000-50,000 years. Music by Doug Maxwell, “A good day on the African Planes” and Joel Cummings, “Robots and Aliens”.

 

Alzheimer’s disease affects millions of people and their families. Scientists have made extraordinary progress characterizing the pathology of Alzheimer’s and working to find effective treatments. As scientists continue to unlock more and more about the disease and how to combat it, how can we address the challenges currently facing doctors, patients, and caregivers? In this 360 Perspective episode, we talk about the history of Alzheimer’s, the stigma surrounding it, disparities in healthcare, and the impacts on caregivers. We interviewed Drs. Carl Hill, Stephanie Kalb, Jason Karlawish, Gad Marshall, and Stephen Salloway to discuss these issues.

Music credits: Myuu - “Suspicious”

Sneaky Snitch Kevin MacLeod (incompetech.com). Licensed under Creative Commons: By Attribution 3.0 License

Additional music provided by Aaron Troutman.

Puberty may seem like a chaotic phase of life, but the process is precisely controlled by a series of timed signals beginning in the brain. Before we are born, a set of neurons secreting GnRH (gonadotropin-releasing hormone) migrate to the brain and set up the hub that will control reproductive processes. During this time, these neurons recruit newborn astrocytes, and they stick together throughout life. In this episode, we speak with Dr. Vincent Prévot, Director of the Development and Plasticity of the Neuroendocrine Brain Team of INSERM, to discuss his research on the neuroendocrine regulators of reproduction. Dr Prévot tells us about how the GnRH neurons actively recruit astrocytes, and how this process can be interrupted. Listen to hear more about the processes that lead to puberty, environmental factors that affect the natural timing of puberty, and why it is important for puberty to happen at the “right time.” Additional music provided by Aaron Troutman.

The disease that would ultimately become known AIDS was first diagnosed in June 1981. At that time, researchers had not yet determined what caused it, and by the time most patients presented with symptoms, they had only months to live. After four decades of effort by the global research community, the development of promising experimental HIV vaccines has now finally come true. We have interviewed Dr. Paolo Lusso, Chief of the Viral Pathogenesis Section at the National Institute of Allergy and Infectious Diseases, to discuss his research in developing and testing promising HIV vaccines. In this episode, Dr. Lusso explains why it took so long to develop a vaccine with the potential to defeat this “master of disguise and transformation”, words he uses to refer to HIV. Listen to this episode to learn more about the immune system, the process of developing a vaccine, and the challenges scientists had to face to stop the most invisible of all viruses. 
“I miss you (reimagined)”, music composition administered by Rukudzo © 2022 Rukudzo Kanyemba. All rights reserved.

“Every gambler knows that the secret to survivin' is knowin' what to throw away and knowin' what to keep...”. Have you ever listened to “The Gambler” by Kenny Rogers? He knew how to play the game right, and it turns out that so does our body! Dr. Phil Jones, a Professor of Cancer Development at the University of Cambridge UK, works on uncovering the dynamics of cell behavior. He found that human cells play a dice game, balancing the odds between production and shedding. This game protects the genomes of our cells, throwing out most of the damage we accumulate during our lives. However, mutations can change the game's rules and increase the odds in favor of dividing cells, potentially leading to cancer. Acquiring mutations is easier than we think: ultraviolet light in sunshine or tobacco-derived chemicals can cause extensive mutations in our body. Despite this, our tissue can surprisingly continue to look and function normally. Listen to this episode to learn how normal tissues restrain the expansion of mutant clones, so very few of them progress to form tumors. Phew!