Friday, March 03, 2023

Waxing and waning of environment influences hominin dispersals across ancient Iran


Peer-Reviewed Publication

GRIFFITH UNIVERSITY

Upland terrain in the Zagros Mountains during Spring demonstrating the ‘greening’ of landscapes. 

IMAGE: UPLAND TERRAIN IN THE ZAGROS MOUNTAINS DURING SPRING DEMONSTRATING THE ‘GREENING’ OF LANDSCAPES. view more 

CREDIT: GRIFFITH UNIVERSITY

A world-first model of paleoclimate and hydrology in Iran has highlighted favourable routes for Neanderthals and modern human expansions eastwards into Asia. 

Published in PLOS ONE, the findings reveal for the first time that multiple humid periods in ancient Iran led to the expansions of human populations, opening dispersal route across the region, and the possible interactions of species such as Neanderthals and our own Homo sapiens.  

Professor Michael Petraglia, a key researcher in the study, said historic humid periods resulted in massive changes to ecosystems and led the team to identify large lakes in areas that were formerly deserts.  

“Conversely, during glacial periods this increased aridity would have led to the expansion of deserts, led to contractions, and the isolation of hominin populations,” said Professor Petraglia, who is the Director of Griffith’s Australian Research Centre for Human Evolution.  

“This cycle of wetting and drying is shown for the first time in Iran.” 

The research team, led by PhD candidate Mohammad Javad Shoaee from the Max Planck Institute for Geoanthropology in Germany, found that during Marine Isotope Stage (MIS) 5, a warm, humid period beginning roughly 130,000 years ago, lakes and rivers enabled two pathways for human groups.  

One was a northern route through the Alborz and Kopet Dagh Mountains and north of the Dasht-I Kavir desert. The other route, first identified here, ran south along the Zagros Mountains before extending eastwards towards Pakistan and Afghanistan.  

The researchers also found evidence for a potential northern route during MIS 3, beginning about 57,000 years ago, which, given artifacts attributed to multiple tool making groups, could have permitted interactions between modern humans and Neanderthals. 

“These findings highlight the importance of Iran for our species’ dispersals out of Africa and ultimately around the globe,” said Professor Petraglia.  

“As in other regions long considered too arid for early human occupations, such as the Arabian Peninsula, recent palaeoclimatic research is changing how we understand the human story and the role that changing climates have played.” 

“We recognised a new southern route along the Zagros Mountains and extending eastwards towards Pakistan and Afghanistan. We found evidence for a potential northern route during MIS 3, which would have permitted hominin movements and species interactions in Southwest Asia,” Shoaee said. 

To find out how human groups made their way into Iran, the team developed the first spatially comprehensive, high resolution palaeohydrological model for Iran.  

They then compared their model, which showed when and where water was available, to the distribution of previously documented archaeological sites.  

The result was a clear relationship between the availability of water and the evidence of human presence.  

Not only does the current study help to explain the presence of previously documented sites, it also serves as a guide for future archaeological surveys in the region.  

“Our paleohydrological analyses identified 145,354km of rivers and 115 paleolakes calculated from 6380 paleolake deposits. Only a handful of these paleolakes have so far been studied,” Shoaee said.  

By focusing on regions where water once made human occupations possible, Professor Petraglia said “researchers could maximize the potential of finding archaeological sites".   

Stone tools recovered during a recent survey of the Central Zagros Mountains, 

indicating that this zone would have been a favorable habitat for human 

occupations in humid periods.

CREDIT

Griffith University

Disclaimer: AAAS a

Pregnant Shark birth tracking technology provides key data for species protection

Protecting newly born shark pups crucial for balancing ocean ecosystem

Peer-Reviewed Publication

ARIZONA STATE UNIVERSITY

Birth-alert-tag (BAT) insertion 

IMAGE: INSERTION OF THE BIRTH-ALERT-TAG (BAT) VIA A SPECIALIZED APPLICATOR INTO THE CLOACAL OPENING OF A PREGNANT TIGER SHARK view more 

CREDIT: CREDIT: TANYA HOUPPERMANS / BLUE ELEMENTS IMAGING

Most people find sharks threatening. Who doesn’t have an image in their mind of a menacing shark fin racing through the ocean in search of its next meal? 

But it is the shark that is threatened. 

According to Defenders of Wildlife, a national nonprofit dedicated to protecting imperiled species, 75% of shark species are threatened with extinction and up to 73 million sharks are being killed each year for their fins. 

Habitats that were once secure places for sharks to give birth have also been affected. And the fact that sharks have long gestation periods, giving birth to relatively few young, and maturing late in life — complicates efforts at repopulation.

And that’s a problem.

In a new paper published today (March 1) in Science Advances, authors James Sulikowski, a professor at Arizona State University and Neil Hammerschlag, a marine ecologist at the University of Miami, describe a new technology they developed capable of remotely documenting the location and time of birth of shark pups. This type of data will enable scientists to create ways to protect the sharks’ most vulnerable habitats, where they give birth.

“If they (the mother sharks) don't have that suitable habitat, then their babies won't be able to grow up. And if babies don't grow up, we have no more sharks and literally, the ocean ecosystem would collapse,” explained James Sulikowski, senior Global Futures scientist at Arizona State University and director of the Sulikowski Shark and Fish Conservation Lab at ASU’s New College of Interdisciplinary Arts and Sciences. 

The device is making waves in the scientific community — and for good reason.

“We've been trying to do this since we started studying sharks. This is our holy grail. We have really advanced shark science, 20, 30, 40 years,” said Sulikowski. “This novel, satellite-based technology will be especially valuable for the protection of threatened and endangered shark species, where protection of pupping and nursery grounds is a conservation priority.” 

The paper outlines the deployment and results of an intrauterine satellite tag on two highly mobile sharks — a scalloped hammerhead and a tiger shark –,to detect when birth occurs, leading to its name, birth-alert-tags (BAT).   

Here’s how BAT works. 

First the BAT is inserted into a pregnant shark. The egg-shaped technology is approximately 2 inches long and 1 inch wide. When the shark gives birth, the BAT pops out along with the pups and reaches the ocean surface. Once there, the device switches to transmitter mode sending messages announcing the time and location of the birth. 

The BAT has already yielded remarkable results. Where it was once assumed that sand sharks gave birth inland, the scientists have learned that they are most comfortable having their pups in abandoned shipwrecks on the ocean floor. 

“It was a total surprise,” Sulikowski said. “For most shark species we have no idea where they give birth or how far they must travel to habitats that are essential to their survival.”

Once habitats are discovered, efforts will be made to protect those areas, either by creating sanctuaries or expanding areas already set aside for this purpose. 

The ultimate goal is to go global with the BAT. 

Sulikowski wants to create a worldwide network of shark scientists to determine areas that are important to sharks and figure out how to protect them. 

Persistence pays off

Sulikowski is enjoying his current success. “We've had every sort of failure that can happen,” he said. “We had battery failures. We had firmware failures, we had antenna failures. I felt like giving up multiple times. But thanks to my co-author, Neil Hammerschlag, we kept forging ahead and we didn't give up.” 

“Honestly, it feels incredible to have created technology that is going to revolutionize the way that we study sharks,” Sulikowski added.

Image of the Birth-Alert-Tag (BAT)

CREDIT

Credit: James Sulikowski


In a new study, researchers used new technologies to remotely document, for the first time in the wild, the location and timing of shark birth. Ultrasounds were used to identify pregnant sharks. During pregnancy in sharks, the entrance to the uterus remains semi-permeable to allow for water exchange between the uterus and outside. So, with the aid of a specialized applicator and guided by the ultrasound, the team inserted a new type of satellite tag through the shark’s cloaca (akin to a vaginal opening) and into its uterus, where the tag was then deposit among developing embryonic sharks. Named the Birth-Alert-Tag (BAT), this new satellite tag remained inside the uterus, along with the developing shark pups, until the mother shark gave birth and expelled the newborn pups, along with the BAT, into the surrounding water. The BAT then floated to the surface and transmitted to satellites the location of where the shark birth took place. The first of its kind, the BATs were successfully deployed in a tiger shark and scalloped hammerhead shark, documenting the location birth.

CREDIT

Infographic by Bianca Rangel. Shark by Kelly Quinn / Canvas of the Wild.


‘Chunky dunk?’ Cleveland’s prehistoric sea monster may have been shorter, stouter, than once believed

Case Western Reserve University scientist PhD student applies new calculations to reveal downsizing and chunky details about species from Devonian Period

Peer-Reviewed Publication

CASE WESTERN RESERVE UNIVERSITY

Downsized Dunkleosteus 

IMAGE: GRAPHICAL ABSTRACT SHOWING THE RELATIVE SIZE OF DUNKLEOSTEUS COMPARED TO A HUMAN FIGURE--BEFORE AND AFTER THE NEW CALCULATIONS. view more 

CREDIT: RUSSELL ENGELMAN/CASE WESTERN RESERVE UNIVERSITY

CLEVELAND—About 360 million years ago, in the shallow subtropical waters above what is now the city of Cleveland, an armor-plated fish many believed to be up to 30 feet long ruled the seas.

The species Dunkleosteus terrelli was Earth’s first vertebrate “superpredator” and lived during the Age of Fishes (Devonian Period)—when North America was near the latitude of what is now Rio de Janeiro.

But in nearly 150 years of research since fossilized remains of the prehistoric big fish were discovered on the shores of Lake Erie in 1867, scientists may have made some incorrect assumptions about Dunkleosteus’ size and shark-like shape.  

In research published this month, a Case Western Reserve University scientist suggests the length of this prehistoric predator may have been greatly exaggerated—that it was much shorter and chunkier.

Cleveland mascot and Ohio’s top fossil fish

Dunkleosteus is already a strange fish, but it turns out the old size estimates resulted in us overlooking a lot of features that made this fish even stranger, like a very tuna-like torso,” said Russell Engelman, a Case Western Reserve PhD student in biology and lead author on a study published in the journal Diversity in February. “Some colleagues have been calling it ‘Chunky Dunk’ or ‘Chunkleosteus’ after seeing my research.”

Engelman said he recognizes downsizing the iconic Dunkleosteus may not be welcome news because the big fish “is essentially Cleveland's mascot when it comes to paleontology” (The species even had a Twitter account for a few years). As a native Clevelander, he said he originally had similar feelings.

Most research on Dunkleosteus is based on specimens in the Cleveland Museum of Natural History, which has the largest and highest quality collection of Dunkleosteus remains in the world. And its name honors both a former museum curator (David Dunkle) and a local business owner (Jay Terrell) who discovered the fossilized species.

Dunkleosteus is such a homegrown icon that in 2020, the Ohio General Assembly declared Dunkleosteus terrelli the state fossil fish.

Even so, little research has been done on the fish since the 1930s, Engelman said.

“Without reliable size estimates, not much could be said about Dunkleosteus scientifically beyond ‘look at the big, scary fish!’” Engelman said. “These length estimates were an example of something that just slipped by everyone's notice because it was assumed this fish has been well-studied.”

Short head, short body

Most estimates of the species’ length weren’t based on hard evidence, Engelman said.

That’s because Dunkleosteus was a type of extinct fish called an arthrodire. Unlike modern fishes, arthrodires like Dunkleosteus had bony, armored heads but internal skeletons made of cartilage. This means only the heads of these animals were preserved as fossils, leaving the size and shape a mystery.

The new study proposes estimating the length based on the 24-inch-long head, minus the snout—considered a way to measure that’s consistent among groups of living fishes and smaller relatives of Dunkleosteus known from complete skeletons.

“The reasoning behind this study can be summed up in one simple observation,” Engelman said. “Short fish generally have short heads and long fish generally have long heads.”

Based on that method, Engelman concluded Dunkleosteus was only 11 to 13 feet long—much shorter than any researcher had proposed before.

‘Wrecking balls’ of the deep

Dunkleosteus has often been reconstructed assuming it had a body shape like a shark,” Engelman said.

But a shorter body and shape of the body armor also meant Dunkleosteus was likely much chunkier.

“An 11-foot Dunkleosteus is essentially the same weight as a 15-foot great white shark,” Engelman said. “These things were built like wrecking balls. The new proportions for Dunkleosteus may look goofy until you realize it has the same body shape as a tuna…and a mouth twice as large as a great white shark.”

These new size estimates also help put Dunkleosteus in a broader scientific context. Dunkleosteus is part of a larger evolutionary story, in which vertebrates went from small, unassuming bottom-dwellers to massive giants.

“Although the reduced sizes for Dunkleosteus may seem disappointing,” Engelman said, “it was still probably the biggest animal that existed on Earth up to that point in time. And these new estimates make it possible to do so many types of analyses on Dunkleosteus that it was thought would never be possible. This is the bitter pill that has to be swallowed, so that now we can get to the fun stuff.”

Patricia Princehouse, associate director of CWRU's Institute for the Science of Origins said it was exciting to see the new work.

"This fresh take on the legendary Dunkleosteus 'sea monster' shows there's still lots of brand-new breakthroughs waiting to be discovered in the world of paleontology, even with famous species," Princehouse said. The multidisciplinary institute initiates and conducts scientific research in origins-related sciences and has promoted work undertaken by Engelman and other students.

Engelman conducted his research under advisor Darin Croft, professor of anatomy at the Case Western Reserve School of Medicine, who also advises students in biology in the College of Arts and Sciences.

The Future of Touch

Researchers uncover physical limitation in haptic holography

Peer-Reviewed Publication

UNIVERSITY OF CALIFORNIA - SANTA BARBARA

(Santa Barbara, Calif.) — Haptic holography promises to bring virtual reality to life, but a new study reveals a surprising physical obstacle that will need to be overcome.

A research team at UC Santa Barbara has discovered a new phenomenon that underlies emerging holographic haptic displays, and could lead to the creation of more compelling virtual reality experiences. The team’s findings are published in the journal Science Advances.

Holographic haptic displays use phased arrays of ultrasound emitters to focus ultrasound in the air, allowing users to touch, feel and manipulate three-dimensional virtual objects in mid-air using their bare hands, without the need for a physical device or interface. While these displays hold great promise for use in various application areas, including augmented reality, virtual reality and telepresence, the tactile sensations they currently provide are diffuse and faint, feeling like a “breeze” or “puff of air.”

“Our new research explains why such holograms feel much more diffuse or indistinct than would be expected,” said Yon Visell, an associate professor of electrical and computer engineering, whose research focus is on interactive technologies with an emphasis on haptics, robotics and electronics. 

The study led by Visell and Gregory Reardon, a doctoral student researcher, used high resolution optical imaging, simulations and perception experiments to study ultrasound-excited waves that are excited in the skin during haptic holography. They discovered that holographic displays excite widespread vibration patterns — shear shock waves — in the skin.  

In haptic holography, Visell explained, shock waves are created when ultrasound waves are focused and scanned in mid-air, causing vibrations in the skin. These vibrations can interfere with each other in a way that amplifies their strength at some locations, a phenomenon known as constructive interference. The formation of shock waves creates a trailing wake pattern that extends beyond the intended focal point, reducing the spatial precision and clarity of the tactile sensations. As an analogy, according to the researchers, if the focused sound beam is a fast-moving boat on the water, the shock wave pattern is a wake trailing the boat. Current holographic haptic displays excite shock wave patterns that are so spread out in the skin that the sensations feel very diffuse.

“Our study reveals how holographic haptic displays, which are a promising new technology for virtual reality and telepresence, require new knowledge in acoustics innovations in design,” Visell said. “By understanding the underlying physics of ultrasound-generated shear shock waves in the skin, we hope to improve the design of haptic holographic displays and make them more realistic and immersive for users. Such haptic displays could enable us to augment our physical surroundings with a limitless variety of virtual objects, interactive animated characters, or graspable tools that can be not only seen, but also touched and felt with the hands.”

The team’s discovery of the previously unknown shock wave phenomena that underlie haptic holography provides an important step forward in creating haptic holographic displays that may enable users to more realistically and immersively interact in the future metaverse.

DESPITE DESANTIS

FSU criminology faculty ranked No. 1 in the nation for research productivity and scholarly influence


Peer-Reviewed Publication

FLORIDA STATE UNIVERSITY

Faculty in Florida State University’s College of Criminology and Criminal Justice are No. 1 in the country for research productivity and influence among faculty in their field, according to a quantitative assessment in the Journal of Criminal Justice Education.  

The journal’s findings draw from data gathered from criminology and criminal justice doctoral programs in the United States from 2015-2021. 

Thomas Blomberg, dean of the College of Criminology and Criminal Justice, said the acknowledgment affirms the college’s progress toward achieving its mission.    

“In addition to our research productivity, we value carrying out high-quality research that makes a difference in the lives of citizens,” he said. “We are very pleased with our consistently high faculty research rankings but translating our research into meaningful policies and practices to reduce the pain and suffering of crime is what we are most proud of.” 

The assessment included 727 faculty members across 45 criminology doctoral programs. Based on multiple indicators of productivity and influence, FSU’s College of Criminology and Criminal Justice was ranked No. 1 for the programs with the highest publication credit per faculty. Penn State University, Arizona State University and the University of Pennsylvania rounded out the top four. 

The College of Criminology and Criminal Justice faculty are teachers and scholars who prepare students to be leaders in shaping America’s response to crime. A branch of the college, the Center for Criminology and Public Policy Research, contributes to evidence-based policymaking and practice at local, state and national levels by producing policy-relevant research that is published in leading journals. 

For more information about the FSU College of Criminology and Criminal Justice and the Center for Criminology and Public Policy Research visit, https://www.criminology.fsu.edu

To access the article, visit the Journal of Criminal Justice Education

RACIST HEALTHCARE U$A

Higher levels of perceived racism linked to increased risk of heart disease in Black women


American Heart Association Epidemiology, Prevention, Lifestyle & Cardiometabolic Health Scientific Sessions 2023, Abstract 455

Reports and Proceedings

AMERICAN HEART ASSOCIATION

Research Highlight:

  • A long-term study of more than 48,000 Black women assessed two measures of perceived interpersonal racism with risk of coronary heart disease.
  • Experiencing self-reported interpersonal racism in employment, housing and interactions with the police was associated with a 26% higher risk of coronary heart disease, relative to not experiencing interpersonal racism in those areas.
  • Self-reported experiences of racism in everyday life were not associated with an increased risk of coronary heart disease.

DALLAS, March 1, 2023 — Self-reported interpersonal racism in employment, housing and interactions with the police was associated with a 26% higher risk of coronary heart disease among Black women, according to preliminary research presented at the American Heart Association’s Epidemiology, Prevention, Lifestyle & Cardiometabolic Health Scientific Sessions 2023. The meeting will be held in Boston, February 28-March 3, 2023, and offers the latest science on population-based health and wellness and implications for lifestyle and cardiometabolic health.

“Many Black adults in the U.S. are already at higher risk of developing heart disease due to high blood pressure or Type 2 diabetes,” said Shanshan Sheehy, Sc.D., lead author of the study and an assistant professor at the Slone Epidemiology Center at Boston University and Boston University’s Chobanian & Avedisian School of Medicine. “Current evidence shows that racism may act as a chronic stressor in the human body, and chronic stress may lead to high blood pressure, which increases the risk of heart attack and stroke.”

Researchers evaluated data for approximately 48,000 individuals enrolled in the Black Women’s Health Study, the largest follow-up study on the health of Black women in the U.S. They reviewed data gathered from 1997, two years after the Black Women’s Health Study began, through 2019 to investigate whether self-perceived interpersonal racism was associated with an increased risk of coronary heart disease. In 1997, the age range of participants in the study was 22-72 years old and by 2019, the age range was 40-90 years old. All participants were free of cardiovascular disease and cancer in 1997; during the 22-year follow-up period, 1,947 women developed coronary heart disease.

In 1997, the participants answered five questions about their experiences related to interpersonal racism in their everyday activities, such as “How often do people act as if they think you are dishonest?” They also answered three questions (for a total of eight) that asked “have you ever been treated unfairly due to your race in any of the following circumstances?” — employment (hiring, promotion, firing), housing (renting, buying, mortgage) or in interactions with police (stopped, searched, threatened).

The researchers calculated a score for self-perceived interpersonal racism in everyday life by averaging participants’ responses to the first set of five questions and divided the participants into quartiles of the score; this analysis found no association with reported experiences of racism in everyday life and increased risk of CHD.

The researchers also calculated a perceived interpersonal racism score for interactions that involved jobs, housing and police interactions by adding up the positive responses to those three additional questions. The self-perceived interpersonal racism scores ranged from 0 (no to all three questions) to 3 (yes to all three questions). The researchers’ analysis of perceived interpersonal racism scores for interactions that involved jobs, housing and police found that women who reported experiencing racism in all three categories had an estimated 26% higher risk of heart disease relative to those who answered no to all three questions.

“Structural racism is real — on the job, in educational circumstances and in interactions with the criminal justice system,” said Michelle A. Albert, M.D., M.P.H., FAHA. Albert is president of the American Heart Association, professor of medicine at the University of California at San Francisco (UCSF), Admissions Dean for UCSF Medical School and an author on the study. “Now we have hard data linking it to cardiovascular outcomes, which means that we as a society need to work on the things that create the barriers that perpetuate structural racism.”

The study’s limitations include that the investigation was limited to self-perceived interpersonal racism, which is subjective by definition and may reflect different perceptions of levels of actual racism for each individual, and this information was collected from study participants only once. Also, despite efforts to adjust the findings based on a comprehensive list of additional factors — age, neighborhood socioeconomic status, education level, body mass index, geographic region, physical activity, smoking, history of diabetes and history of hypertension — the study is observational in nature and may still have some unmeasured factors or other elements that may influence the results that were not included, Sheehy said.

“Future research is needed to examine the impacts of structural racism on cardiovascular health,” Sheehy said, “as well as to evaluate the joint impacts of perceived interpersonal racism and structural racism.”

Co-first author is Max Brock, M.D.; additional co-authors include Julie R. Palmer, Sc.D. M.P.H.; Yvette Cozier, D.Sc.; and Lynn Rosenberg, Sc.D. Authors’ disclosures are listed in the abstract.

This study was funded by the National Institutes of Health.

Statements and conclusions of studies that are presented at the American Heart Association’s scientific meetings are solely those of the study authors and do not necessarily reflect the Association’s policy or position. The Association makes no representation or guarantee as to their accuracy or reliability. Abstracts presented at the Association’s scientific meetings are not peer-reviewed, rather, they are curated by independent review panels and are considered based on the potential to add to the diversity of scientific issues and views discussed at the meeting. The findings are considered preliminary until published as a full manuscript in a peer-reviewed scientific journal.

The Association receives funding primarily from individuals; foundations and corporations (including pharmaceutical, device manufacturers and other companies) also make donations and fund specific Association programs and events. The Association has strict policies to prevent these relationships from influencing the science content. Revenues from pharmaceutical and biotech companies, device manufacturers and health insurance providers and the Association’s overall financial information are available here.

Additional Resources:

The American Heart Association’s EPI/LIFESTYLE 2023 Scientific Sessions is the world’s premier meeting dedicated to the latest advances in population-based science. The meeting will be held Tuesday-Friday, February 28 – March 3, 2023, at the Omni Boston Seaport in Boston, Massachusetts. The primary goal of the meeting is to promote the development and application of translational and population science to prevent heart disease and stroke and foster cardiovascular health. The sessions focus on risk factors, obesity, nutrition, physical activity, genetics, metabolism, biomarkers, subclinical disease, clinical disease, healthy populations, global health and prevention-oriented clinical trials. The Councils on Epidemiology and Prevention and Lifestyle and Cardiometabolic Health (Lifestyle) jointly planned the EPI/Lifestyle 2023 Scientific Sessions. Follow the conference on Twitter at #EPILifestyle23.

Obstacles for breast cancer prevention in high-risk Black women


New study finds multiple hurdles, competing priorities

Peer-Reviewed Publication

OHIO STATE UNIVERSITY

Black women at high risk of breast cancer face a variety of obstacles that may keep them from care that could prevent cancer and increase the chances they’ll survive if they develop the disease, new research has found.

A study from researchers at The Ohio State University provides insights into the factors that contribute to racial disparities in use of preventive measures, including genetic testing, prophylactic mastectomies and medication to thwart breast cancer.

In the new study, which appears today (March 1, 2023) in the journal PLOS ONE, the researchers interviewed 20 Black women and 30 white women at high risk of breast cancer to better understand racial differences in the decision-making process, which hadn’t previously been well-studied.

Among their findings: Black women may be less focused on breast cancer risk as an issue to be addressed proactively, may less frequently possess information to help guide their decisions about prevention, and face more constraints when it comes to making and carrying out health-protective decisions.

“We need to recognize that the personal, interpersonal and social dynamics that Black women are experiencing that influence their ability to cope with their risk are complicated and multilayered and need to be taken into account if we’re going to empower people to do something about their risk,” said Tasleem Padamsee, lead author of the study and an assistant professor in Ohio State’s College of Public Health.

Women with strong family histories of breast cancer, genetic predispositions to the disease or other risk factors can face a 20% to 80% risk of developing the disease within their lifetimes, but can cut that risk in half, or more, by using preventive therapies, research has shown. Black women in the U.S. are diagnosed with breast cancer at about the same rate as white women, although at younger ages and later stages of disease, and with higher breast cancer mortality rates.

“I walked away from these conversations feeling like many of these women have experienced horrible things with cancer over and over again, and that they just have an overriding sense that cancer is this thing that comes at you, upends your life and the life of everyone around you, and it’s up to God what happens from there,” said Padamsee, who is a member of The Ohio State University Comprehensive Cancer Center’s Cancer Control Research Program.

“Being in a cutting-edge cancer center, we have ways, and are finding new ones, to head the disease off at the pass and — if we can’t — to catch it earlier, when the prognosis is much better. And we want all high-risk women to have those advantages.”

The researchers found several differences based on race, all of which pointed to potentially worse outcomes for the high-risk Black women.

Overall, the Black women in the study described feeling less ready and equipped to consider and cope with their risk and less informed about their options. They also reported facing more obstacles in availing themselves of those options and having less access to detailed information to help them make decisions about managing their risk.

Previous research using data from the same interviews with this group of women found that experiences with family members had a profound influence on perceptions of their own risk and prevention options. Though Black women generally reported having more up-close experiences with family members who had cancer, that didn’t seem to be associated with awareness of measures they might take to protect themselves, Padamsee said.

The Black women in the study were more likely to describe cancers as a collective group of diseases for which they have an equally high risk, rather than recognizing a particular predisposition to breast cancer. Women who thought this way did not generally believe anything specific could be done to prevent their increased risk, instead viewing a healthy lifestyle and regular health screenings as their sole tools to mitigate risk.

Many white women in the study who were more inclined to pursue preventive medication, such as Tamoxifen, or prophylactic mastectomies, told the researchers they perceived themselves to be at specific risk of breast cancer and that they worried a lot about its impact on them and their families.

In contrast, Black women in the study who worried about their cancer risk were more likely to talk about their faith.

“We’re just a really spiritual family, we believe in God. … I put my faith in God in that everything will be alright,” said one of the middle-aged Black women interviewed for the study.

While worrying less and having a stronger spiritual connection could have mental health benefits for Black women, it also could serve as a barrier to seeking out risk-management options, Padamsee said.

Black women in the study were also more likely to describe other priorities in their lives — including family and work demands and other health struggles — that were top of mind. About 20% of white women in the study had a major health concern besides the high risk of breast cancer, compared to 40% of the Black women.

Access to care from specialists, including genetic counselors, was also uneven. About 15% of the Black women reported access to specialists, compared to 70% of the white women.

That disparity likely has a significant influence on another key finding — that Black women were less likely to know about preventive measures and were much less likely to undergo genetic testing even when they’d heard of it.

Black women’s ability to manage their breast cancer risk also is more significantly impacted by financial barriers, the study suggests. Of the Black women in the study, 40% had experienced a time without insurance, compared to just 3% of the white women. And 40% of the Black women also described significant financial difficulties coping with health challenges, compared to 3% of whites.

These new findings could provide a foundation for building equity within health care, Padamsee said. Among the possibilities she suggests: Find better ways to acknowledge and incorporate patients’ spirituality and religious perspectives into discussions about prevention, ensure that women have access to good insurance coverage or other ways of paying for specialist care, and improve training for primary care physicians who are often the sole source of medical counsel for high-risk Black women. 

“There’s a lot of hand waving when it comes to talking about health equity problems, and discrimination and disadvantage in general,” she said. “One of the things that’s really important in equity work is that we have clear documentation of where the differences are and where they’re coming from, and this study helps provide that.”

Other Ohio State researchers who worked on the study are Anna Muraveva, Megan Hils, Celia Wills and Electra Paskett.

 

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CONTACT: Tasleem Padamsee, Padamsee.1@osu.edu

Written by Misti Crane, 614-292-3739; Crane.11@osu.edu