Friday, June 10, 2022

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University of Kentucky investigators receive $3.7 million to study Kentucky’s sleep deprivation epidemic

Grant and Award Announcement

UNIVERSITY OF KENTUCKY

University of Kentucky Investigators Receive $3.7 Million to Study Kentucky’s Sleep Deprivation Epidemic 

IMAGE: UNIVERSITY OF KENTUCKY RESEARCHERS CHRISTAL BADOUR AND MAIREAD MOLONEY ARE LEADING A STUDY TO UNDERSTAND WHY RESIDENTS IN APPALACHIAN KENTUCKY ARE SOME OF THE NATION’S MOST SLEEP-DEPRIVED. view more 

CREDIT: ARDEN BARNES | UNIVERSITY OF KENTUCKY PHOTO

LEXINGTON, Ky. (June 10, 2022) — Poor sleep is linked to a wide range of medical issues, including hypertension, diabetes, depression, obesity and cancer. With more than a third of U.S. adults reporting insufficient sleep, the Centers for Disease Control and Prevention (CDC) describes sleep deprivation as a public health epidemic.

The public health burden of sleep deprivation is especially high in Kentucky: residents are some of the nation’s most sleep-deprived, particularly in rural Appalachia where 25-58% of adults report insufficient sleep, defined as less than six hours a day.

The University of Kentucky has received a $3.7 million grant from the National Institutes of Health (NIH) to find out why people in the Appalachian region of Kentucky have such consistently poor sleep outcomes.

Led by Mairead Moloney, Ph.D., and Christal Badour, Ph.D., associate professors in the College of Arts and Sciences, "Researching Equitable Sleep Time in Kentucky Communities (REST-KY)" will provide answers to long-standing questions about the causes and consequences of sleep deficiencies in rural populations.

The new knowledge will inform interventions to reduce sleep disparities among people in rural Appalachia, who also experience severe health inequities including higher mortality rates for many conditions including diabetes, heart disease and cancer.

“Sleep is the critical pivot point for understanding ways in which people in this region experience health disparities,” said Badour. “If we can understand why people are getting poor sleep, we can then identify interventions that can help them sleep better, which would have cascading benefits for many aspects of their health.”

The REST-KY team includes experts across four UK colleges: Suzanne Segerstrom, Ph.D. and Lauren Whitehurst, Ph.D., from the College of Arts and Sciences, Daniela Moga, Ph.D., from the College of Pharmacy, Nancy Schoenberg, Ph.D. from the College of Medicine, and Emily Slade, Ph.D., from the College of Public Health.

“This collaboration of experts across so many disciplines will enable us to get a holistic look at the biological, behavioral, emotional, and social contributions to sleep health,” said Moloney.

Over the five-year study, the team will track the sleep of 400 adults from Appalachian Kentucky, along with health information such as heart rate, physical activity, blood sugar levels, and immune function. Participants will also report their daily experiences including stress and substance use.

Participants will come from 12 Kentucky counties: six that have been identified as insufficient sleep “hotspots” (Pike, Knott, Perry, Letcher, Bell and Whitley), and six that are not considered hotspots of insufficient sleep (Jackson, Lincoln, Russell, Adair, Rockcastle and Estill) – even though they have comparable economic distress, rurality, and demographics.

Results will show what drives sleep deficiencies and health outcomes over time, how factors linked to sleep deficiencies differ between hotspot and non-hotspot counties, and the degree to which daytime distress impacts sleep.

The findings will be used as a basis to develop and implement interventions to improve sleep among Appalachian Kentuckians. 

As one of the NIH’s prestigious “R01” grants, REST-KY builds upon the team’s previous interdisciplinary research, including a 2018 intervention study to address insomnia among women in Appalachian Kentucky.

That study came about thanks to UK programs intended to generate and support collaborative research.

Moloney, Badour and Moga initially connected through UK’s Building Interdisciplinary Research Careers in Women’s Health (BIRCWH) fellowship, and their study received pilot funding through UK’s Igniting Research Collaborations program and support from UK’s Center for Clinical and Translational Science.

“The BIRCWH fellowship and the Igniting Research Collaboration grants are foundational starting points for REST-KY,” said Moloney. “The project is a testament to how internal funding programs at UK can lead to these wonderful collaborations, which generate extramural grants to support groundbreaking research.”

Research reported in this publication was supported by the National Institute on Minority Health and Health Disparities of the National Institutes of Health under Award Number R01MD016236. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health.

The University of Kentucky is increasingly the first choice for students, faculty and staff to pursue their passions and their professional goals. In the last two years, Forbes has named UK among the best employers for diversity, and INSIGHT into Diversity recognized us as a Diversity Champion four years running. UK is ranked among the top 30 campuses in the nation for LGBTQ* inclusion and safety. UK has been judged a “Great College to Work for" three years in a row, and UK is among only 22 universities in the country on Forbes' list of "America's Best Employers."  We are ranked among the top 10 percent of public institutions for research expenditures — a tangible symbol of our breadth and depth as a university focused on discovery that changes lives and communities. And our patients know and appreciate the fact that UK HealthCare has been named the state’s top hospital for five straight years. Accolades and honors are great. But they are more important for what they represent: the idea that creating a community of belonging and commitment to excellence is how we honor our mission to be not simply the University of Kentucky, but the University for Kentucky.

Latin dance may be a step toward better working memory for older Latinos

Peer-Reviewed Publication

UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN, NEWS BUREAU

aguinaga_susie220505-mh-01-m 

IMAGE: LATINO ADULTS WHO PARTICIPATED IN A HEALTH INTERVENTION THAT PROVIDED LATIN DANCE LESSONS SHOWED SIGNIFICANT IMPROVEMENTS IN THEIR WORKING MEMORY, ACCORDING TO A STUDY LED BY SUSAN AGUIÑAGA, A PROFESSOR OF KINESIOLOGY AND COMMUNITY HEALTH. view more 

CREDIT: PHOTO BY MICHELLE HASSEL

CHAMPAIGN, Ill. — Dance is at the heart of Latin culture, celebrated for its social, historical and cultural significance. And new research suggests that older Latinos who regularly participate in it can help their brains stay healthy, too.

Latinos age 55 and over who participated in a culturally relevant Latin dance program for eight months significantly improved their working memory compared with peers in the control group who attended health education workshops, according to the study’s lead author, Susan Aguiñaga, a professor of kinesiology and community health at the University of Illinois Urbana-Champaign.

Working memory – the ability to temporarily keep a small amount of information in mind while performing other cognitive tasks – is integral to planning, organizing and decision-making in everyday life.

The dance program used in the study, Balance and Activity in Latinos, Addressing Mobility in Older Adults – or BAILAMOS – showed promise at enticing older Latinos to become more physically active and help stave off age-related cognitive decline, Aguiñaga said.

“Dance can be cognitively challenging,” Aguiñaga said. “When you’re learning new steps, you have to learn how to combine them into sequences. And as the lessons progress over time, you must recall the steps you learned in a previous class to add on additional movements.”

BAILAMOS was co-created by study co-author David X. Marquez, a professor of kinesiology and nutrition, and the director of the Exercise and Psychology Lab at the University of Illinois Chicago; and Miguel Mendez, the creator and owner of the Dance Academy for Salsa.

BAILAMOS incorporates four types of Latin dance styles: merengue, salsa, bachata and cha cha cha, said Aguiñaga, who has worked with the program since its inception when she was a graduate student at the U. of I. Chicago.

“It’s an appealing type of physical modality,” she said. “Older Latinos are drawn to Latin dance because most of them grew up with it in some way.”

Latin dance can evoke positive emotions that prompt listeners to participate, increasing levels of physical activity in a population that tends to be sedentary, according to the study, published in the journal Frontiers in Aging Neuroscience.

More than 330 Spanish-speaking Latino adults who were middle-aged or older were recruited for the study, primarily through community outreach in local churches. Participants were randomly assigned to either the dance group or the control group, which met once a week for two-hour health education classes that covered topics such as nutrition, diabetes and stress reduction.

Participants in the BAILAMOS groups met twice weekly for the dance sessions, taught by a professional instructor for the first four months and later by a “program champion” – an outstanding participant in each group who displayed enthusiasm and leadership qualities. The programs champions were selected and trained by the instructor to lead the sessions during the four-month maintenance phase.

Over the different waves of the four-year study, the dance lessons were held at 12 different locations across Chicago, such as neighborhood senior centers and churches that were familiar and easily accessible to participants, Aguiñaga said.

Participants’ working memory – along with their episodic memory and executive function – was assessed with a set of seven neuropsychological tests before the intervention began, when it concluded after four months and again at the end of the maintenance phase.

Participants also completed questionnaires that assessed the number of minutes per week they engaged in light, moderate and vigorous physical activity through tasks associated with their employment, leisure activities, household maintenance and other activities.

On average, participants were about 65 years old with body mass indices that placed them in the obese category. About 85% of the study participants were female.

As with a small pilot study of BAILAMOS conducted previously, the current study found no differences in any of the cognitive measures between the dance participants and their counterparts in the health education group at four months. However, after eight months, people in the dance group performed significantly better on tests that assessed their working memory.

“That’s probably one of the most important findings – we saw cognitive changes after eight months, where participants themselves had been leading the dance classes during the maintenance phase,” Aguiñaga said. “All of our previous studies were three or four months long. The take-home message here is we need longer programs to show effects.

“But to make these programs sustainable and create a culture of health, we also need to empower participants to conduct these activities themselves and make them their own.”

The study also was co-written by Dr. David Buchner, the Shahid and Anne Carlson Kahn Professor in Applied Health Sciences; and Edward McAuley, an emeritus professor of kinesiology and community health, both at the U. of I.’s Urbana campus.

Co-authors at the Chicago campus were Susan Hughes, a professor emerita of community health sciencesMichael Berbaum, the director of both the Methodology Research Core for the Institute for Health Research and Policy, and the Biostatistics Core of the Center for Clinical and Translational Science; and biostatistician Tianxiu Wang.

Other co-authors were health sciences professor Navin Kaushal, of Purdue University, Indianapolis; Guilherme M. Balbim, a postdoctoral research fellow at the University of British Columbia; neurological sciences professor Robert S. Wilson and professor of nursing JoEllen E. Wilbur, both of Rush University; public health professor Priscilla M. Vásquez, of the Charles R. Drew University of Medicine and Science; and Isabela G. Marques, of the CAPES Foundation in Brasilia, Brazil.

Words matter: How to reduce gender bias with word choice

Peer-Reviewed Publication

CELL PRESS

In the workplace, even subtle differences in language choice can influence the perception of gender, for better or worse. These choices fall into two main categories: minimizing the role of gender by using gender-neutral terms or emphasizing an individual’s gender through “gender marking.” In a commentary in the journal Trends in Cognitive Sciences, behavioral scientist Stav Atir argues that by using these two approaches thoughtfully, one can promote gender equality.

“If anyone suggested saying ‘female politician’ or ‘lady scientist,’ I think many would say ‘No, thank you,’” says Atir (@AtirStav), an assistant professor at the University of Wisconsin Madison who studies how gender bias can affect perceptions of professionals.

The gender-neutral approach involves using words like “businessperson,” instead of “businessman” or “businesswoman,” or using gender-neutral pronouns like “they” instead of “he” or “she.” Using this language can erase the conception that men and women are wildly different beings, and it fights back against our natural tendency to rely on stereotypes in our thinking, studies show.

“But wholesale gender neutrality in language is no panacea,” says Atir. This approach suffers from the fact that gender-neutral terms tend to be considered masculine by default.

“Even when gender isn’t explicitly specified, stereotypes often fill in the gender blank,” says Atir. “Occupation words such as ‘businessperson’ or ‘surgeon,’ though technically gender neutral, likely conjure up an image of a man; likewise, ‘nurse’ (also technically gender neutral) conjures up an image of a woman.”

The alternative—using a gender-marking approach—can be used to highlight the success of women in male-dominated fields. “In order to spotlight the breakers of glass ceilings and those following in their footsteps, we must mention their gender,” says Atir.

This approach comes with its own drawbacks, like reinforcing negative stereotypes. “Gender marking, then, should not be used thoughtlessly,” says Atir. “Though it can draw attention to professionals whose gender is underrepresented, it can also have ironic consequences, prompting stereotypical thinking and bolstering the perception of women as exotic exceptions to the male rule.”

“We might be tempted to throw up our hands and give up the endeavor of using language to express and promote our beliefs. That would be a mistake,” says Atir. “Language remains one tool in our toolbox for social change, and, unlike some of our other tools, it’s one that we can all use. The key to using this tool effectively is to tailor our language to the context, taking into account our situation-specific goals.”

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Trends in Cognitive Sciences, Atir: “Girlboss? Highlighting versus downplaying gender through language” https://www.cell.com/trends/cognitive-sciences/fulltext/S1364-6613(22)00105-X

Trends in Cognitive Sciences (@TrendsCognSci), published by Cell Press, is a monthly review journal that brings together research in psychology, artificial intelligence, linguistics, philosophy, computer science, and neuroscience. It provides a platform for the interaction of these disciplines and the evolution of cognitive science as an independent field of study. Visit: http://www.cell.com/trends/cognitive-sciencesTo receive Cell Press media alerts, please contact press@cell.com.

Racial disparities in health care spending, use among Medicaid enrollees

JAMA Health Forum

Peer-Reviewed Publication

JAMA NETWORK

About The Study: In this analysis of nearly 2 million Medicaid enrollees in 2016, compared with white enrollees, Black enrollees generated lower spending and used fewer services, including primary care and recommended care for acute and chronic conditions, but had substantially higher emergency department use. Differences persisted among enrollees residing in the same zip codes who were treated by the same health care professionals.

Authors: Jacob Wallace, Ph.D., of the Yale School of Public Health in New Haven, Connecticut, is the corresponding author.

To access the embargoed study: Visit our For The Media website at this link https://media.jamanetwork.com/

(doi:10.1001/jamahealthforum.2022.1398)

Editor’s Note: Please see the article for additional information, including other authors, author contributions and affiliations, conflict of interest and financial disclosures, and funding and support.

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Embed this link to provide your readers free access to the full-text article This link will be live at the embargo time https://jamanetwork.com/journals/jama-health-forum/fullarticle/10.1001/jamahealthforum.2022.1398?utm_source=For_The_Media&utm_medium=referral&utm_campaign=ftm_links&utm_term=061022

About JAMA Health Forum: JAMA Health Forum has transitioned from an information channel to an international, peer-reviewed, online, open access journal that addresses health policy and strategies affecting medicine, health and health care. The journal publishes original research, evidence-based reports and opinion about national and global health policy; innovative approaches to health care delivery; and health care economics, access, quality, safety, equity and reform. Its distribution will be solely digital and all content will be freely available for anyone to read.

Estimating potential deaths averted from hypothetical income support policies

JAMA Health Forum

Peer-Reviewed Publication

JAMA NETWORK

About The Study: Researchers estimated the number of deaths that could be averted among working-age adults age 18 to 64 with hypothetical income support policies in the United States.

Authors: Anton L. V. Avanceña, M.S., of the University of Michigan in Ann Arbor, is the corresponding author.

To access the embargoed study: Visit our For The Media website at this link https://media.jamanetwork.com/

(doi:10.1001/jamahealthforum.2022.1537)

Editor’s Note: Please see the article for additional information, including other authors, author contributions and affiliations, conflict of interest and financial disclosures, and funding and support.

#  #  #

Embed this link to provide your readers free access to the full-text article This link will be live at the embargo time https://jamanetwork.com/journals/jama-health-forum/fullarticle/10.1001/jamahealthforum.2022.1537?utm_source=For_The_Media&utm_medium=referral&utm_campaign=ftm_links&utm_term=061022

About JAMA Health Forum: JAMA Health Forum has transitioned from an information channel to an international, peer-reviewed, online, open access journal that addresses health policy and strategies affecting medicine, health and health care. The journal publishes original research, evidence-based reports and opinion about national and global health policy; innovative approaches to health care delivery; and health care economics, access, quality, safety, equity and reform. Its distribution will be solely digital and all content will be freely available for anyone to read.

Can they make graphite from coal? OHIO researchers start by finding new carbon solid

Peer-Reviewed Publication

OHIO UNIVERSITY

Amorphous graphite 

IMAGE: AMORPHOUS GRAPHITE (YELLOW) OBTAINED AFTER THERMAL TREATMENT AT HIGH TEMPERATURE (3000K) FROM A RANDOM INITIAL CONFIGURATION (GRAY). view more 

CREDIT: OHIO UNIVERSITY

As the world's appetite for carbon-based materials like graphite increases, Ohio University researchers presented evidence this week for a new carbon solid they named "amorphous graphite."

Physicist David Drabold and engineer Jason Trembly started with the question, "Can we make graphite from coal?"

"Graphite is an important carbon material with many uses. A burgeoning application for graphite is for battery anodes in lithium-ion batteries, and it is crucial for the electric vehicle industry — a Tesla Model S on average needs 54 kg of graphite. Such electrodes are best if made with pure carbon materials, which are becoming more difficult to obtain owing to spiraling technological demand," they write in their paper, "Ab initio simulation of amorphous graphite," that published today in Physical Review Letters.

Ab initio means from the beginning, and their work pursues novel paths to synthetic forms of graphite from naturally occurring carbonaceous material. What they found, with several different calculations, was a layered material that forms at very high temperatures (about 3000 degrees Kelvin). Its layers stay together due to the formation of an electron gas between the layers, but they're not the perfect layers of hexagons that make up ideal graphene. This new material has plenty of hexagons, but also pentagons and heptagons. That ring disorder reduces the electrical conductivity of the new material compared with graphene, but the conductivity is still high in the regions dominated largely by hexagons.

Not all hexagons

"In chemistry, the process of converting carbonaceous materials to a layered graphitic structure by thermal treatment at high temperature is called graphitization. In this letter, we show from ab initio and machine learning molecular dynamic simulations that pure carbon networks have an overwhelming proclivity to convert to a layered structure in a significant density and temperature window with the layering occurring even for random starting configurations. The flat layers are amorphous graphene: topologically disordered three-coordinated carbon atoms arranged in planes with pentagons, hexagons and heptagons of carbon," said Drabold, Distinguished Professor of Physics and Astronomy in the College of Arts and Sciences at Ohio University.

"Since this phase is topologically disordered, the usual 'stacking registry' of graphite is only statistically respected,” Drabold said. “The layering is observed without Van der Waals corrections to density functional (LDA and PBE) forces, and we discuss the formation of a delocalized electron gas in the galleries (voids between planes) and show that interplane cohesion is partly due to this low-density electron gas. The in-plane electronic conductivity is dramatically reduced relative to graphene."

The researchers expect their announcement to spur experimentation and studies addressing the existence of amorphous graphite, which may be testable from exfoliation and/or experimental surface structural probes.

Trembly, Russ Professor of Mechanical Engineering and director of the Institute for Sustainable Energy and the Environment in the Russ College of Engineering and Technology at Ohio University, has been working in part on green uses of coal. He and Drabold — along with physics doctoral students Rajendra Thapa, Chinonso Ugwumadu and Kishor Nepal — collaborated on the research. Drabold also is part of the Nanoscale & Quantum Phenomena Institute at OHIO, and he has published a series of papers on the theory of amorphous carbon and amorphous graphene. Drabold also emphasized the excellent work of his graduate students in carrying out this research.

CAPTION

One of the planes in 1,000-atom model of amorphous graphite. Yellow spheres are carbon atoms. Note the “ring disorder”: co-existing pentagons, hexagons and heptagons.

CREDIT

Ohio University

Surprising interplane cohesion

"The question that led us to this is whether we could make graphite from coal," Drabold said. "This paper does not fully answer that question, but it shows that carbon has an overwhelming tendency to layer — like graphite, but with many 'defects' such as pentagons and heptagons (five- and seven-member rings of carbon atoms), which fit quite naturally into the network. We present evidence that amorphous graphite exists, and we describe its process of formation. It has been suspected from experiments that graphitization occurs near 3,000K, but the details of the formation process and nature of disorder in the planes was unknown," he added.

The Ohio University researchers' work is also a prediction of a new phase of carbon.

"Until we did this, it was not at all obvious that layers of amorphous graphene (the planes including pentagons and heptagons) would stick together in a layered structure. I find that quite surprising, and it is likely that experimentalists will go hunting for this stuff now that its existence is predicted,” Drabold said. “Carbon is the miracle element — you can make life, diamond, graphite, Bucky Balls, nanotubes, graphene, and now this. There is a lot of interesting basic physics in this, too — for example how and why the planes bind, this by itself is quite surprising for technical reasons."

The process of layer formation (VIDEO)

How crops can better survive floods

Peer-Reviewed Publication

UNIVERSITY OF FREIBURG

Thale cress 

IMAGE: WHEN OBSERVING THALE CRESS, SJON HARTMAN AND HIS COLLABORATORS FOUND OUT WHICH SIGNALING PATHWAYS THE HORMONE ETHYLENE USES TO SWITCH ON A MOLECULAR EMERGENCY PROGRAM IN PLANTS IN THE EVENT OF FLOODING. view more 

CREDIT: IRIS HARTMAN / UNIVERSITY OF FREIBURG

Extreme weather phenomena are on the rise worldwide, including frequent droughts and fires. Floods are also a clear consequence of climate change. For agriculture, a flooded field means major losses: about 15 percent of global crop losses are due to flooding. As part of a collaboration between Freiburg, Utrecht in the Netherlands, and other institutes, Junior Professor Dr. Sjon Hartman from the Cluster of Excellence CIBSS - Centre for Integrative Biological Signalling Studies at the University of Freiburg, has now discovered that a signaling molecule can make plants more resistant to flooding. The gaseous plant hormone ethylene causes the plant to switch on a kind of molecular emergency power system that helps it survive the lack of oxygen during flooding. The team had previously demonstrated that ethylene sends a signal to the plant that it is underwater. Pretreating the experimental plants with the hormone improved their chances of survival. The results, which appeared in the journal Plant Physiology, should help to combat waterlogging and flooding in agriculture and, for example, to develop resistant plant varieties.

Tracking the adaptations to wet conditions

Plant species differ greatly in their ability to survive periods of flooding or waterlogging. “In the case of potatoes, the roots die after two days due to a lack of oxygen. Rice plants are much more resistant, able to survive their entire lives in waterlogged paddy fields,” Hartman explains. The Arabidopsis thaliana, a model organism for plant research, can be used to study the genes and proteins that make up this adaptation. “Plants notice that they are surrounded by water because the gas ethylene, which all plant cells produce, can no longer escape into the air,” Hartman continues. The researchers showed this in previous studies at Utrecht University. Receptors throughout the plant subsequently respond to increased concentrations of the hormone.

Simulate flooding with oxygen deprivation

The team simulated flooding by placing Arabidopsis seedlings in a bell jar without light or oxygen. When the seedlings were previously exposed to ethylene gas, the root tip cells survived longer. The treated plants stopped root growth and switched energy production in the cells to oxygen-free metabolic processes. In addition, the ethylene caused the cells to be better protected against harmful oxygen radicals that accumulate in oxygen-deprived plants. This was revealed by analyses of gene activity and protein composition of the cells.

"Taken together, these rearrangements that ethylene triggers improve plant survival during and after flooding," Hartman summarizes. "As we better understand these signaling pathways, we can learn to make crops more resilient to flooding to combat climate change."

Read more about Jun.-Prof. Dr. Sjon Hartman's research at CIBSS:
https://www.cibss.uni-freiburg.de/de/news/he-is-getting-to-the-root-of-plant-memory-2

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About the Cluster of Excellence CIBSS

The Cluster of Excellence CIBSS - Centre for Integrative Biological Signalling Studies aims to gain a comprehensive understanding of biological signaling processes across scales - from the interactions of single molecules and cells to the processes in organs and whole organisms. The researchers are using the knowledge they have gained to develop strategies that can be used to control signals in a targeted manner. Thanks to these technologies, they not only able to unlock new insights in research, but also enable innovations in medicine and plant sciences.

Overview of facts:

  • Original publication: Liu, Z., Hartman, S., van Veen, H., Zhang, H., Leeggangers, H., Martopawiro, S., Bosman, F., de Deugd, F., Su, P., Hummel, M., Rankenberg, T., Hassall, K., Bailey-Serres, J., Theodoulou, F., Voesenek, L., Sasidharan, R. (2022): Ethylene augments root hypoxia tolerance via growth cessation and reactive oxygen species amelioration, Plant Physiology, 2022, kiac245, https://doi.org/10.1093/plphys/kiac245
  • Sjon Hartman has been Junior Professor for “Plant Environmental Signalling and Development” at the University of Freiburg since 2022 and is a member of the Cluster of Excellence CIBSS - Centre for Integrative Biological Signalling Studies.
  • Hartman researches the biological signaling processes that enable plants to respond to their environment and adapt to changing conditions. https://www.hartman-plantlab.com/

Researchers create rapid test for deadly infections in livestock, starting with pigs

Saliva test allows penside testing

Peer-Reviewed Publication

MCMASTER UNIVERSITY

Leyla Soleymani 

IMAGE: MCMASTER UNIVERSITY RESEARCHER LEYLA SOLEYMANI view more 

CREDIT: MCMASTER UNIVERSITY

HAMILTON, ON, June 10, 2022 – Researchers at McMaster University have developed a new form of rapid test to detect infections in farm animals, responding to the rising threat of dangerous outbreaks.

The prototype has been proven effective in detecting a devastating diarrheal infection in pigs first identified in Canada in 2014, and can be adapted to test for other pathogens, and in other animals.

The test, created by biochemist Yingfu Li and engineer Leyla Soleymani and their colleagues, uses a small sample of saliva to detect the chemical markers of infection.

It employs technology similar to a form of test the same research team recently created to detect COVID and other infections in humans. The human test is now moving toward the marketplace with public research funding and corporate support.

The animal test, once it becomes widely available, is expected to be a valuable tool for identifying and isolating outbreaks in farm settings, and for limiting the possibility of animal-to-human transmission of infections, which is believed to be the origin of the COVID-19 pandemic.

Disease outbreaks often require entire herds to be euthanized, with sometimes severe economic and environmental consequences. Canada is a leading producer of pork, with 14 million hogs on 7,600 farms.

“There is a really a clear need for this technology,” Li said. “There are many reasons why everyone – even people who don’t eat pork – should care about animal-infection surveillance.”

The work has been published today in the influential German science journal Angewandte Chemie, which has identified it as a “very important paper” – a specific and rare distinction. The research was funded by the Natural Sciences and Engineering Research Council of Canada.

Li and Soleymani’s co-authors on the paper are Amanda Victorious, Zijie Zhang, Dingran Chang, Roderick Maclachlan, Richa Pandey, Jianrun Xia, Jimmy Gu and Todd Hoare.

The new test could be a significant advancement in the concept of “One Health,” the growing understanding of the interconnection between human, animal and ecosystem health.

Creating such technology is part of the mission of McMaster’s broader Global Nexus for Pandemics and Biological Threats.

The researchers have designed the aptamer-based test to be portable, accurate and quick, allowing veterinarians and other animal caretakers to identify, isolate and treat infected animals quickly.

The test works by mixing a small saliva sample with a chemical reagent and applying the blend to a small microchip reader, which is in turn attached to a smartphone, which displays the results in minutes.

After consulting with experts in the field, the researchers chose to create their first animal test for Porcine Epidemic Diarhhea, a serious viral threat which can spread quickly through entire farms.

One of the greatest technical challenges in developing the test over the last four years was to extract the infection’s chemical signature from the thick and often contaminated saliva of pigs, using samples collected by veterinarian collaborators.

“The challenge here was that the samples we get from animal swabs are much less pure than what we get from humans,” Soleymani said. “You can’t tell a pig to rinse its mouth before swabbing it, so we had to adapt our process to accommodate these challenges.”