Friday, July 14, 2023

Psychedelic-assisted therapies for patients with PTSD


The resurgence of research into psychedelic-based treatments is poised to benefit many people who face mental health challenges, such as post-traumatic stress disorder, but how do they feel about it?


Peer-Reviewed Publication

MEDICAL UNIVERSITY OF SOUTH CAROLINA

Demonstration of psychedelic-assisted therapy 

IMAGE: MEDICAL UNIVERSITY OF SOUTH CAROLINA PSYCHIATRIST DR. JENNIFER JONES (LEFT) AND MELISSA MICHEL (RIGHT, RECLINING), LEAD THERAPIST FOR MUSC'S CENTERSPACE CLINIC, DEMONSTRATING PSYCHEDELIC-ASSISTED THERAPY. view more 

CREDIT: MEDICAL UNIVERSITY OF SOUTH CAROLINA. PHOTOGRAPH COURTESY OF DR. JENNIFER JONES.



Psychedelic-based therapies are poised to change the treatments that psychiatrists can offer patients.

“I often talk about psychedelic treatments as catalysts for change, for both the individual and the field of psychiatry,” said Medical University of South Carolina psychiatrist Jennifer Jones, M.D., who conducts research on these treatments.

The highly anticipated approval of MDMA, or “ecstasy,” to treat post-traumatic stress disorder would be the first for a psychedelic drug, ushering in changes for patients, mental health providers and society. The Food and Drug Administration is expected to issue a decision on MDMA-assisted therapy for PTSD in early 2024.

How well this revolutionary research will be implemented into practice will depend on patients’ willingness to undergo psychedelic-based treatments and their ability to access those treatments, said Jones. Jones’ latest research, published in Frontiers in Psychiatry, examines these potential barriers in a population that stands to benefit greatly from psychedelic therapies for PTSD: individuals that use substances.

Changing treatments and outcomes

Approval of psychedelic therapies could help patients with mental illnesses, particularly those with multiple or treatment-resistant disorders. PTSD is an often severe mental disorder that can occur after being exposed to a traumatic event. Current treatments, while improving symptoms in some patients, leave many without any benefit at all.

For the many people who have PTSD and habitually use alcohol or other substances, rates of nonresponse to treatment are even higher. Jones thinks this is unacceptable, so she started researching new approaches to treat patients with both PTSD and a substance use disorder.

A promising ‘new’ treatment option for patients with both PTSD and SUD may come from an ‘old’ group of drugs called psychedelics. Psychedelics include both natural (psilocybin, mescaline, DMT) and synthetic (LSD, MDMA) drugs. Natural psychedelics have been used medicinally and spiritually in traditional cultures for centuries. However, they were described scientifically mostly in the 1950s and 1960s.

“It is really interesting – in these early studies looking at psychedelic therapy for one indication, like PTSD, they noticed improvements in symptoms of another mental health disorder, like depression or SUD,” said Jones.

Since 2009, approximately 80 clinical trials involving MDMA have been completed or are ongoing, according to Clinicaltrials.gov. These trials investigate the use of MDMA in a wide range of disorders, including anxiety, depression, obsessive compulsive disorder, SUD and PTSD. These diverse studies highlight the potential effects of MDMA across multiple disorders, something that prior treatments have lacked.

“This is really important,” said Jones. “It is very common to have concurrent mental health disorders, so having a treatment like MDMA that could, for example, improve both PTSD and SUD symptoms is really exciting for the field.”

Currently, drugs used to treat PTSD may be given with or without another form of therapy, broadly referred to as “talk therapy.” For MDMA-assisted therapy, the talk therapy component is a fundamental part of the treatment.

“In the context of MDMA-assisted therapy for PTSD, MDMA is thought to dampen the fear response around the traumatic memory, allowing the participant to engage with the therapy team to process this memory, sometimes for the first time in their lives,” said Jones. “Instead of running from it, they can process the traumatic memory and move past it.”

This processing may also apply to other mental functions, perhaps accounting for MDMA’s ability to improve symptoms for other disorders, like SUD.

“Participants in psychedelic clinical trials have lasting benefits that come from changes in their behaviors, their thought processes and their interactions with others,” said Jones. “Participants often point to these changes as what made the difference in their symptoms.”

The immediate effects of MDMA during therapy are not without concern, however. Jones is often asked whether the MDMA will produce feelings of “ecstasy.” “Ecstasy is a common descriptor for the effects caused by recreational MDMA, used so frequently that it became a nickname for the drug. However, because this therapy is a difficult process of self-healing, MDMA in this context does not usually produce ecstasy, Jones said. This common concern points to some of the possible barriers that Jones wanted to assess in her recent publication.

Changing minds

For some, reluctance to receive MDMA-assisted therapy is tied to negative views of psychedelics and their recreational uses. In the 1970s, all psychedelics were classified as Schedule I substances, drugs with high-abuse potential without clinical benefits, tarnishing political and public perceptions of these drugs. Their recreational use and representations in media have continued to perpetuate this stigma.

Negative views of psychedelics and increasing regulatory control halted early promising research on psychedelics in Western medicine in the 1970s, reported the Multidisciplinary Association for Psychedelic Studies. It wasn’t until the 1990s that officially sanctioned psychedelic research resumed on a small scale, only accelerating in the 2010s. New government policies allowed psychedelic clinical research to resume, but public perceptions of psychedelics will determine the success of these drugs as treatments.

In Jones’ study, approximately 70% of survey respondents indicated their support for MDMA-based research and belief that MDMA could be useful for treating mental health disorders. A smaller group, 59%, would be willing to receive an MDMA-based treatment if it were recommended by a mental health provider. The survey results suggest that most people who use substances are open to MDMA research and would be willing to try an MDMA-based therapy.

Jones also examined the role of race and ethnicity on opinions about MDMA-assisted therapy. Despite their underrepresentation in psychedelic clinical trials, racial and ethnic groups had similar levels of support for MDMA research. However, there were small, but potentially important, differences in willingness to try an MDMA-based therapy. “While largely a hypothesis,” said Jones, “differences in willingness to participate in clinical trials are probably related to prior use or cultural beliefs.”

While this research brings up additional questions for Jones and colleagues, she believes these results can help researchers and mental health providers to understand how to develop and implement treatments more equitably for different patient and ethnic populations.

By discussing these issues prior to the FDA decision, Jones hopes steps can be taken to address patient concerns.

“It is my heartfelt goal that everyone who might benefit from MDMA-assisted therapy is able to receive treatment once it is available, and that they will not be held back by worries or stigma about the treatment,” said Jones. “For that to be a reality, we have to seek input directly from those most likely to benefit from the treatments that we are developing.”

 

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About MUSC

Founded in 1824 in Charleston, MUSC is the state’s only comprehensive academic health system, with a unique mission to preserve and optimize human life in South Carolina through education, research and patient care. Each year, MUSC educates more than 3,200 students in six colleges – Dental Medicine, Graduate Studies, Health Professions, Medicine, Nursing and Pharmacy – and trains more than 900 residents and fellows in its health system. MUSC brought in more than $298 million in research funds in fiscal year 2022, leading the state overall in research funding. MUSC also leads the state in federal and National Institutes of Health funding, with more than $220 million. For information on academic programs, visit musc.edu.

As the health care system of the Medical University of South Carolina, MUSC Health is dedicated to delivering the highest-quality and safest patient care while educating and training generations of outstanding health care providers and leaders to serve the people of South Carolina and beyond. Patient care is provided at 16 hospitals (includes owned and equity stake), with approximately 2,700 beds and four additional hospital locations in development; more than 350 telehealth sites and connectivity to patients’ homes; and nearly 750 care locations situated in all regions of South Carolina. In 2022, for the eighth consecutive year, U.S. News & World Report named MUSC Health University Medical Center in Charleston the No. 1 hospital in South Carolina. To learn more about clinical patient services, visit muschealth.org.

MUSC has a total enterprise annual operating budget of $5.1 billion. The nearly 26,000 MUSC family members include world-class faculty, physicians, specialty providers, scientists, students, affiliates and care team members who deliver groundbreaking education, research, and patient

Bacterium associated with disease found in NC chiggers

Peer-Reviewed Publication

NORTH CAROLINA STATE UNIVERSITY

Disease Bacterium Detected in North Carolina Chiggers 

IMAGE: SCANNING ELECTRON MICROSCOPY IMAGE OF A CHIGGER. view more 

CREDIT: LOGANATHAN PONNUSAMY, NC STATE UNIVERSITY




A bacterium that causes a disease called scrub typhus – a disease not previously reported in the United States – has been detected in North Carolina, according to a new study by researchers at North Carolina State University and UNC-Greensboro. 

The researchers stress that scrub typhus, which can cause fever, headache and body aches – and can be fatal if left untreated by antibiotics – has not yet been detected in animals or people in the state.

The NC State researchers detected the bacterium – the genus is Orientia in the family Rickettsiaceae – at a high frequency while testing free living, larval (ready to bite) trombiculid mites, commonly called chiggers, in several different recreational parks in North Carolina.

“We wanted to see if chiggers in the United States carried Orientia,” said Loganathan Ponnusamy, an NC State principal research scholar in entomology and co-corresponding author of a paper that describes the research. “We haven’t in the past had the diagnostic tools to test for this specific bacterium at the genus level.”

“We set a black tile on the ground in 10 different North Carolina state parks and picked up chiggers as they crossed the tile. Microbiome studies allowed us to characterize all the bacteria in the chiggers. One park showed a 90% positivity rate for the bacterium (nine out of 10 chiggers captured); another showed an 80% positivity rate (eight of 10 chiggers captured). Other parks showed positivity rates of just 10%.”

Trombiculid mites are only parasitic in their larval stage. They search for vertebrate hosts – including humans – to bite, Ponnusamy says. 

“Chiggers can spread bacteria to people or rodents when they bite but can also pass bacteria to future generations of mites through their eggs,” he added.

The researchers say that scrub typhus presents symptoms similar to those of Rocky Mountain spotted fever, a disease generally ascribed to tick bites.

Scrub typhus is found more commonly in Asia and the Pacific, but in recent years has been detected in Africa and the Middle East. It is uncertain whether spread is caused by people or goods carrying chiggers from one place to another.

“We don’t know if this is a recent introduction into the state or if the bacterium has been here for years,” said R. Michael Roe, William Neal Reynolds Distinguished Professor of Entomology at NC State and co-author of the paper. “We also don’t know if the infected chiggers found in North Carolina actually will cause disease; this has to be determined in future work.”

“We also don't have information about whether the chigger infection rate is decreasing or increasing,” said Kaiying Chen, a postdoctoral research scholar at NC State and lead author of the paper.

The NC State and UNC-Greensboro researchers are resampling chiggers in the recreational park sites to see if the reported findings remain consistent.

The paper appears in the journal Emerging Infectious Diseases. Other co-authors include Nicholas V. Travanty and Charles S. Apperson from North Carolina State University; Reuben Garshong and Gideon Wasserberg from the University of North Carolina Greensboro; and Dac Crossley from the Georgia Museum of Natural History. 

Funding was provided by a grant from the National Institutes of Health, National Institute of Allergy and Infectious Diseases (grant no. 1R03AI166406-01); a grant from the Southeast Center for Agricultural Health and Injury Prevention, and from the Department of the Army, U.S. Army Contracting Command, Aberdeen Proving Ground, Natick Contracting Division, Ft Detrick MD. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the position or the policy of the Government and no official endorsement should be inferred.

- kulikowski -

Note to editors: The abstract of the paper follows.

“Detection of Orientia Spp. Bacteria in Field-Collected Free-Living Eutrombicula Chigger Mites, USA”

Authors: Kaiying Chen, Nicholas V. Travanty, Charles S. Apperson, R. Michael Roe, and Loganathan Ponnusamy, North Carolina State University; Reuben Garshong and Gideon Wasserberg, University of North Carolina Greensboro; Dac Crossley, Georgia Museum of Natural History

Published: July 12, 2023 in Emerging Infectious Diseases

DOI: 10.3201/eid2908.230528 

Abstract: Scrub typhus, a rickettsial disease caused by Orientia spp., is transmitted by infected larval trombiculid mites (chiggers). We report the molecular detection of Orientia species in free-living Eutrombicula chiggers collected in an area in North Carolina, United States, in which spotted fever group rickettsiae infections are endemic.

Could drops replace eye injections for retina disease?


Peer-Reviewed Publication

COLUMBIA UNIVERSITY IRVING MEDICAL CENTER




NEW YORK, NY-- A new study suggests that eye drops developed by Columbia University researchers could be a more effective–and comfortable–therapy for a common eye disease currently treated with injections into the eye.

Retinal vein occlusion (RVO), an eye disease that affects up to 2% of people over age 40, occurs when a vein in the eye’s retina becomes blocked, leading to swelling in the eye, inflammation, damage to the retina, and vision loss. 

Standard therapy involves injecting into the eye a vascular endothelial growth factor inhibitor (anti-VEGF) that reduces swelling. The therapy can improve vision but patients with significant retinal damage due to impaired blood flow often have poor outcomes.

“Anti-VEGF therapy has helped a lot of people with RVO, but the fear factor—having to get a needle in the eye—causes many people to delay treatment, which can lead to retinal damage,” says Carol M. Troy, MD, PhD, professor of pathology & cell biology and of neurology at Columbia University Vagelos College of Physicians and Surgeons. “There’s an opportunity to help more people with this disease that is a leading cause of blindness worldwide.”

The study found that an experimental eye drop treatment was twice as effective as the standard injection therapy at reducing swelling and improving blood flow within the retina of mice with RVO. The eye drops also prevented neurons (photoreceptors) in the retina from deteriorating and preserved visual function over time, whereas the standard injections had no effect on either. 

Eye drops target ‘death enzyme’

The eye drops contain an experimental drug that blocks caspase-9, an enzyme that triggers cell death, and was found by Troy’s lab to be overactive in blood vessels injured by RVO. 

“We think the eye drops improve the health of blood vessels in the retina, which then decreases the toxic signaling that damages the retina’s neurons and leads to vision loss,” says Maria I. Avrutsky, PhD, the study’s first author who conducted the research as a postdoc in the Troy lab.

Future studies are aimed at preparing to test the eye drops in human clinical trials and identifying additional therapeutic targets. 

“Finding the root cause of RVO is the holy grail, but if we can at least provide better symptomatic relief that doesn’t distress patients, it would be a really good start,” Troy says. 

More information

The study, “Caspase-9 inhibition confers stronger neuronal and vascular protection compared to VEGF neutralization in a mouse model of retinal vein occlusion,” was published online in Frontiers of Neuroscience

All authors: Maria I. Avrutsky (Columbia, now at Character Biosciences), Claire W. Chen (Columbia), Jacqueline M. Lawson (Columbia), Scott J. Snipas (Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA) Guy S. Salvesen (Sanford Burnham Prebys), and Carol M. Troy (Columbia).

The study was supported by a sponsored research agreement with Opera Therapeutics and grants from the National Institutes of Health (R01NS091333 and T32EY013933) and the Department of Defense Army/Air Force. 

Carol Troy and Maria Avrutsky are inventors on patent applications filed by Columbia University related to the therapeutic use of caspase-9 inhibitors. Maria Avrutsky received consulting income from Opera Therapeutics.

The other authors report no financial or other conflicts of interest.

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Columbia University Irving Medical Center (CUIMC) is a clinical, research, and educational campus located in New York City. Founded in 1928, CUIMC was one of the first academic medical centers established in the United States of America. CUIMC is home to four professional colleges and schools that provide global leadership in scientific research, health and medical education, and patient care including the Vagelos College of Physicians and Surgeons, the Mailman School of Public Health, the College of Dental Medicine, the School of Nursing. For more information, please visit cuimc.columbia.edu.

As the pickleball craze grows, doctors urge players not to ignore injuries


As pickleball-related sprains, strains and overuse injuries rise, survey finds many forgo care for nagging sports injuries

Reports and Proceedings

ORLANDO HEALTH

News Package 

VIDEO: PICKLEBALL: ALL FUN AND GAMES UNTIL SOMEONE GETS HURT view more 

CREDIT: ORLANDO HEALTH



Orlando, Fla - Pickleball is the fastest growing sport in the country and has proven to be a great way to help millions stay active. And while it may seem like a fun game with a silly name, like any sport, it is not without risk. As doctors see more patients with pickleball-related injuries, a new national survey by The Harris Poll on behalf of Orlando Health finds many Americans are likely to forgo medical care for a nagging sports injury.

“Because pickleball is a relatively low impact activity, a lot of people think they won’t get hurt, but we’re seeing more and more people coming in with everything from broken bones and sprains to overuse injuries to the knees, shoulders and elbows,” said Luis Gandara, MD, a sports medicine physician at the Orlando Health Jewett Orthopedic Institute. “Any injury that doesn't seem to be getting better in a matter of a few days needs to be checked out by an orthopedic specialist to get a correct diagnosis and effective treatment.”

The survey found that while a third (33%) of Americans report avoiding participation in a sport or hobby because of a nagging injury, about half (49%) agree it’s not worth seeing a doctor for a sports injury they believe will heal on its own, something Gandara warns can exacerbate injuries and lead to more serious problems that are more difficult to treat.

“Playing through an injury that doesn’t resolve with rest, ice and elevation causes that injury to become increasingly unstable,” he said. “If a patient comes to us right away, there is a good chance we can treat them with less-invasive options to help common injuries like a strained ligament, torn muscle or a hairline fracture heal. But if an injury is left to worsen over time without intervention, a patient is more likely to require surgery and a longer and more difficult recovery.”

The survey also found 44% believe making a doctor’s appointment for an injury that is not too painful is too much work. That’s why the Jewett Orthopedic Institute opened several walk-in clinics, where patients can see an orthopedic specialist without an appointment or a referral, to ensure patients can get the care they need quickly and conveniently.

“Unlike going to the ER or an urgent care center, an orthopedic walk-in clinic is staffed with specialists who can assess sports injuries and immediately initiate effective treatment, whether that involves physical therapy and non-invasive treatments like injections or a same day referral to a specific type of surgeon,” Gandara said.

Robbin Murray fell in love with pickleball a decade ago. But as she played more frequently and competitively, she began to have issues with her knee that were painful enough to keep her off the court.

“I was hooked right from the start and would play as much as I could, all day long, eventually traveling to compete in senior tournaments,” Murray said. “It all added up and I started experiencing sharp pains that would take me down to the ground in the middle of a game.”

Robbin worried she would need knee replacement surgery, but after consulting with Dr. Gandara, has been able to safely participate in the sport she loves and manage her injury with a specialized brace, anti-inflammatory injections and physical therapy to strengthen and stretch the area.

Gandara encourages people to get out and enjoy pickleball or any healthy activity they enjoy, but emphasizes the importance of easing into any new activity, taking precautions like stretching and wearing supportive shoes and listening to your body when something doesn’t feel right.

B-ROLL, SOUND BITES, WEB ELEMENTS & HI-RES STILL PHOTOS - Including HD video available for free/unrestricted use by the news media: https://bit.ly/44yMLLB 
CourtesyOrlando Health

For assistance in downloading, or if you have any questions, contact: allison@mediasourcetv.com or call: 423.742.5091.

Survey Method

This survey was conducted online within the United States by The Harris Poll on behalf of Orlando Health from June 15 - 20, 2023 among 2,076 U.S. adults ages 18 and older. The sampling precision of Harris online polls is measured by using a Bayesian credible interval. For this study, the sample data is accurate to within +/- 2.7 percentage points using a 95% confidence level. For complete survey methodology, including weighting variables and subgroup sample sizes, please contact allison@mediasourcetv.com


Luis Gandara, MD, examines a patient at The Orlando Health Jewett Orthopedic Institute who suffered an injury while playing the increasingly popular sport of pickleball. While he encourages patients to participate in active hobbies they enjoy, he stresses the importance of seeking care for nagging aches and pains to prevent injuries from worsening.

Pickleball is a great way to stay active, but like any sport, it comes with risks. A new national survey by Orlando Health finds many Americans are likely to forgo treatment for nagging sports injuries, something doctors warn can lead to more serious conditions and complicated treatments.

CREDIT

Orlando Health

About Orlando Health
Orlando Health, headquartered in Orlando, Florida, is a not-for-profit healthcare organization with $9.2 billion of assets under management that serves the southeastern United States and Puerto Rico. 

Founded more than 100 years ago, the healthcare system is recognized around the world for Central Florida’s only pediatric and adult Level I Trauma program as well as the only state-accredited Level II Adult Trauma Center in Pinellas County. It is the home of the nation’s largest neonatal intensive care unit under one roof, the only system in the southeast to offer open fetal surgery to repair the most severe forms of spina bifida, the site of an Olympic athlete training facility and operator of one of the largest and highest performing clinically integrated networks in the region. Orlando Health has pioneered life-changing medical research and its Graduate Medical Education program hosts more than 350 residents and fellows. 


The 3,888-bed system includes 29 hospitals and emergency departments – 24 of which are currently operational with five coming soon. The system also includes nine specialty institutes, more than 100 adult and pediatric primary care practices, skilled nursing facilities, an in-patient behavioral health facility under the management of Acadia Healthcare, and more than 60 outpatient facilities that include imaging and laboratory services, wound care centers, home healthcare services in partnership with LHC Group, and urgent care centers in partnership with FastMed Urgent Care. More than 4,750 physicians, representing more than 100 medical specialties and subspecialties have privileges across the Orlando Health system, which employs more than 27,000 team members and more than 1,200 physicians. 

In FY22, Orlando Health served nearly 142,000 inpatients and 3.9 million outpatients. The healthcare system provided more than $782 million in total value to the communities it serves in the form of charity care, community benefit programs and services, community building activities and more in FY 21, the most recent period for which this information is available. Additional information can be found at http://www.orlandohealth.com, or follow us on LinkedInFacebookInstagram and Twitter @orlandohealth.

Marine fossils unearth story about Panama’s deep past


Peer-Reviewed Publication

SMITHSONIAN TROPICAL RESEARCH INSTITUTE

Field work Colon 

IMAGE: MOST OF THE SPECIMENS DESCRIBED IN THE NEW BIOLOGY LETTERS PAPER WERE COLLECTED BY CARLOS DE GRACIA FROM STRI AND JORGE VELEZ JUARBE FROM THE LOS ANGELES MUSEUM OF NATURAL HISTORY. view more 

CREDIT: ALDO B./JORGE V./CARLOS DE G.




Between 6.4 and 5.8 million years ago, most of the land bridge that connects North and South America had already emerged and the channels connecting both Pacific and Atlantic oceans were shallow. Recent fossil discoveries in the northern Panama Canal area suggest that marine species interchange persisted across these shallow waters during the final stages of formation of the isthmus.

In 2017 and 2019, Aldo Benites-Palomino was studying fossils collected in Caribbean Panama, when he came across some unexpected specimens. He was a biology student in Perú, where his training had been very classical. As an intern and later a fellow at the Smithsonian Tropical Research Institute (STRI), his mindset shifted. His mentor, STRI staff scientist and paleobiologist Carlos Jaramillo, encouraged his students to change their focus when looking at fossils: instead of thinking about specimens or methods, to think about the questions that the fossils could help answer.

“I wanted to go to STRI because it is the most important tropical biology center in the world,” said Benites-Palomino. “There I was able to learn a lot about the way biology and ecology is done in the modern world.”

The fossil remains belonged to small-sized cetaceans, a group of aquatic mammals that includes whales and dolphins, and the specimens were new for the region. Most of them had been collected by Carlos de Gracia from STRI and Jorge Velez Juarbe from the Los Angeles Museum of Natural History, both co-authors in a new paper published in Biology Letters. In the article, Benites-Palomino and his colleagues go beyond describing the specimens, they also unearth the story they reveal about the isthmus’ deep past.

The fossils belonged to the Late Miocene, around 6.4 to 5.8 million years ago, when the final stages of formation of the isthmus had already started. This event affected oceanic waters and marine currents across the globe and triggered speciation events, where species separated by the land bridge developed their own unique characteristics on either ocean.

However, these cetaceans found in Caribbean Panama shared similarities with other Late Miocene species from the North and South Pacific Ocean, particularly the Pisco Formation in Peru, suggesting that some organisms were still able to disperse via the shallowing seaway at a time when deep water interchange between both oceans was no longer occurring.

The lack of fossil marine mammals from the western Caribbean has thus far hampered understanding of the region’s deep past, so these new findings help strengthen current knowledge regarding the connectivity between the Pacific and Caribbean marine faunas during the final phases of formation of the isthmus.

“The marine vertebrate fossil record of Panama has been barely explored,” said Carlos Jaramillo, STRI staff scientist and co-author of the study. “There are still many specimens that need to be studied and many more still in the rocks waiting to be found.”

The fossils collected in the northern Panama Canal area belonged to small-sized cetacean specimens from the Late Miocene and were new for the region.

CREDIT

Jaime Bran

The cetacean specimens found in Caribbean Panama shared similarities with Late Miocene species from the Pacific Ocean, particularly the Pisco Formation in Peru.

CREDIT

Jorge Alemán/STRI


Hidden details of Egyptian paintings revealed by chemical imaging


On-site analysis of paint layering identifies history of alterations in ancient paintings


Peer-Reviewed Publication

PLOS

Hidden mysteries in ancient Egyptian paintings from the Theban Necropolis observed by in-situ XRF mapping 

IMAGE: PORTRAIT OF RAMSES II IN NAKHTAMUN TOMB, CHIEF OF THE ALTAR IN THE RAMESSEUM (TOMB TT 341, POSSIBLY 20TH DYNASTY, CIRCA 1100 B.C.). view more 

CREDIT: IMAGE CREDIT 1: MARTINEZ ET AL., CC-BY 4.0 (HTTPS://CREATIVECOMMONS.ORG/LICENSES/BY/4.0/)



Portable chemical imaging technology can reveal hidden details in ancient Egyptian paintings, according to a study published July 12, 2023 in the open-access journal PLOS ONE by Philippe Martinez of Sorbonne University, France in collaboration with colleagues at the University of Liège, Belgium.

Ancient Egyptian paintings are commonly thought to be the result of highly formalized workflows that produced skilled works of art. However, most studies of these paintings and the process that created them take place in museums or laboratories. In this study, Martinez and colleagues use portable devices to perform chemical imaging on paintings in their original context, allowing for analysis of paint composition and layering and for the identification of alterations made to ancient paintings.

Two paintings were analyzed in detail, both located in tomb chapels in the Theban Necropolis near the River Nile, dating to the Ramesside Period. On the first painting, researchers were able to identify alterations made to the position of a figure’s arm, though the reason for this relatively small change is uncertain. On the second painting, analysis uncovered numerous adjustments to the crown and other royal items depicted on a portrait of Ramesses II, a series of changes that most likely relate to some change in symbolic meaning over time.

Such alterations to paintings are thought to be rare among such art, but the researchers suggest that these discoveries call for further investigation. Many uncertainties remain about the reasoning and the timing behind the alterations observed, some of which might be resolved by future analysis. This study also serves to prove the utility of portable chemical imaging technology for studying ancient paintings in-situ.

The authors add: “These discoveries clearly call for a systematized and closer inspection of paintings in Egypt using physicochemical characterization.”

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In your coverage please use this URL to provide access to the freely available article in PLOS ONEhttps://journals.plos.org/plosone/article?id=10.1371/journal.pone.0287647

Citation: Martinez P, Alfeld M, Defeyt C, Elleithy H, Glanville H, Hartwig M, et al. (2023) Hidden mysteries in ancient Egyptian paintings from the Theban Necropolis observed by in-situ XRF mapping. PLoS ONE 18(7): e0287647. https://doi.org/10.1371/journal.pone.0287647

Author Countries: France, Egypt, Netherlands, Belgium, USA

Funding: PW: DIM Analytics, project IMAPAT, Ile-de-France, https://www.dim-analytics.fr PW: ANR-11-IDEX-0004-02, National Research Agency under the program Future Investments (program POLYRE of Sorbonne Universités), http://anr.fr CD and DS: Prf-2019-060, The Belgian Federal Science Policy Office through the FED-tWIN program, http://www.belspo.be. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


Hidden mysteries in ancient Egyptian paintings from the Theban Necropolis observed by in-situ XRF mapping