SciPod

The oceans, huge and brimming with diverse lifeforms, pose no less a struggle for survival for their inhabitants than that faced by creatures on dry land. Evolution has furnished marine organisms with huge array of defensive, and indeed, offensive adaptations to help them to thrive in this battleground. Among the organisms who live and compete in the ocean are dinoflagellates. These are small, single-celled creatures that are an important component of plankton found in marine ecosystems. Despite their tiny size, dinoflagellates such as Karlodinium veneficum can wield potent biochemical weaponry that gives them an edge against other competing organisms. Decades since the discovery of the toxic properties of Karlodinium veneficum, researchers such as Dr. Allen Place of the University of Maryland Center for Environmental Sciences, and his colleagues, have begun to unravel the secrets of its potent toxins, called karlotoxins. Their findings offer fascinating insights into the interactions of marine life and the weapons they adopt to capture prey and deter predators.

It’s not difficult to picture a lush forest landscape populated with majestic deer and elk, long admired for their prowess and strength. Now, imagine that same scene, but instead of healthy and happy animals browsing a forest ecosystem, we see creatures that are thin and disoriented, that struggle to run or even stand, with halting and confused movements that are pitiable and distressing to watch. This is the harsh reality of Chronic Wasting Disease, an illness that currently has no cure and that threatens such wildlife around the world. Part of the challenge with Chronic Wasting Disease is the difficulty in studying it reliably in wildlife. The disease has subtle signs at an early stage, and it is difficult to obtain robust and reproducible data from large, wild animals who often live in remote and poorly accessible forest ecosystems. Consequently, researchers have turned to an unlikely but powerful ally, the tiny laboratory mouse, to model and study the disease under laboratory conditions. Dr. Andrea Grindeland of the McLaughlin Research Institute, and her colleagues, have authored a review of the existing mouse models of Chronic Wasting Disease. These tiny creatures have been engineered to mimic the biology of cervids, such as deer and elk, and are providing crucial insights into how Chronic Wasting Disease evolves, is transmitted, and how it might one day be controlled or even eradicated.

Racist encounters, both subtle and overt, continue to plague society and take a severe toll on the mental and physical health of people of colour. However, innovative research shows how we can equip youth and adults with the skills to navigate these stressful situations and emerge stronger. Dr. Howard Stevenson and his team at the University of Pennsylvania are pioneering new approaches to help people cope with racial trauma and find their voice.

The Arctic’s climate is changing faster than almost anywhere else on Earth, but climate scientists are still uncertain how it is being affected by carbon-rich aerosols, released by fires thousands of kilometres to the south. Through their research, a team led by Dr Yvette Gramlich at Stockholm University in Sweden and the Paul Scherrer Institute in Switzerland has gained deeper insights into how these aerosols are impacting Earth’s northernmost reaches. Their work could help climate scientists to better predict how the Arctic’s climate will change in the future.

Cholangiocarcinoma is an aggressive cancer that begins in the bile ducts. While the cancer is relatively rare, affecting approximately 8,000 people in the United States each year, unfortunately, it is often undiagnosed until an advanced stage. This late diagnosis makes cholangiocarcinoma very challenging to treat, and less than 10% of patients survive for five years after diagnosis. Traditional anti-cancer treatments, such as chemotherapy, have only limited effectiveness in cholangiocarcinoma, and can cause serious side effects. Recently developed immunotherapy and targeted therapies have provided promising options for this difficult-to-treat disease. Dr. Kim Saverno of the Incyte Corporation, a biopharmaceutical company headquartered in the U.S., and the study’s co-authors, have been studying the real-world use of an FDA-approved targeted drug for cholangiocarcinoma called pemigatinib. Pemigatinib was approved by the FDA in 2020. It can be specifically used for cholangiocarcinoma patients who have genetic changes in a protein known as fibroblast growth factor receptor 2, or FGFR2 for short. Their study, to the best of our knowledge, is the first to examine pemigatinib's use in real-world settings, and reveals information about treatment patterns, FGFR2 testing patterns, and effectiveness of pemigatinib for cholangiocarcinoma when used in everyday practice.

Hypertrophic cardiomyopathy (or HCM for short) is a serious heart condition that involves thickening of the heart muscle wall and disruption of the normal tissue architecture, called ‘disarray’. This can result in sudden cardiac death caused by abnormal heart rhythms, known as arrhythmias. Identifying those HCM patients who are most at risk could permit preventative measures, such as implanting a cardioverter-defibrillator, which could potentially be lifesaving. However, current techniques to predict the risk of sudden death in HCM are limited, leaving patients underserved. In a recent study, Dr Richard Saumarez, an academic cardiologist formerly of the University of Cambridge, and colleagues, questioned whether conventional methods, which consider risk factors such as family history of sudden death or the degree of heart muscle thickening, are effective in predicting sudden death in HCM patients. Their research suggests that risk factor assessments might miss crucial information about the heart’s electrical behaviour, which could provide more accurate clues about the risk of sudden death. As an alternative, the researchers propose direct heart-investigation methods, called electrophysiological techniques, as a more reliable assessment. Although the study was concerned with HCM, the arguments put forward are more general and applicable to other diseases, particularly to survivors of myocardial infarcts who are also at risk of sudden death.

Our hearing is amongst our most profound senses, connecting us to the surrounding world through sound. However, this connection is diminished or absent altogether in millions of people around the world because of hearing loss. Hearing loss is a common sensory disorder and is often hereditary. The condition can be caused by complex genetic factors, and so far, researchers have linked over 150 genes to hearing impairment. Now, a new collaborative study led by Dr. Qiang Wang of the South China University of Technology, Dr. Tao Cai from the National Institute of Health, and Dr. Yuan Li from the China-Japan Friendship Hospital in Beijing, has uncovered a new genetic clue, a mutation in the OXR1 gene, that could upend our understanding of hereditary hearing loss, and the eventual treatments that we develop to combat it.

Humans aren’t the only species that use tools, many animals do. Our closest relatives, the great apes, have long been known for their intelligence and ability to manipulate objects in their environment. Among the great apes, orangutans stand out for their complex tool use, which may hold important clues about how early human technologies evolved. A recent Outlook article authored by Dr. Robert Shumaker and Dr. Christopher Martin, both of the Indianapolis Zoo, delves into the existing research into ways that orangutans use stone tools, exploring the cognitive processes behind this behavior and what it can tell us about human evolution.

As global agriculture faces increasing challenges from climate change, soil degradation, and herbicide resistance, sustainable practices are becoming more crucial than ever. Among these practices, the use of cover crops, a technique that has been gaining traction for its multiple benefits, stands out. Dr. Kurt Vollmer and his colleagues at the University of Maryland and Rutgers University have delved into this area, focusing on the potential of spring-seeded grass cover crops in improving weed management and crop yields, specifically in cucurbit production. Their research sheds light on how integrating cover crops with traditional farming techniques can lead to more sustainable and productive agricultural systems.

Neuromorphic computing is a powerful tool for identifying time-varying patterns, but is often less effective than some AI-based techniques for more complex tasks. Researchers at the iCAS Lab directed by Ramtin Zand at the University of South Carolina, work on an NSF CAREER project to show how the capabilities of neuromorphic systems could be improved by blending them with specialized machine learning systems, without sacrificing their impressive energy efficiency. Using their approach, the team aims to show how the gestures of American Sign Language could be instantly translated into written and spoken language.