Study found unique blood biomarkers in patients with post-COVID-19 condition

LONDON, ON – Published this week in Molecular Medicine, researchers at Lawson Health Research Institute have found that patients with post-COVID-19 condition (long COVID) have unique biomarkers in their blood. The team is now working on developing a first of its kind blood test that could be used to diagnose long COVID. The discovery could also lead to new therapeutics for this condition.

Long COVID occurs when someone experiences symptoms like fatigue, cognitive issues, shortness of breath and gastrointestinal issues after an initial COVID-19 diagnosis. It can sometimes take up to 12 months for the condition to occur.

“It’s estimated that 30 to 40 per cent of patients with COVID-19 will develop long COVID,” says Dr. Douglas Fraser, Lawson Scientist and Critical Care Physician at London Health Sciences Centre (LHSC). “Physicians currently rely on symptoms alone to diagnose the condition, but our research offers a unique profile of blood biomarkers that could be used in a clinical test.”

The researchers studied 140 blood samples from participants at LHSC and St. Joseph’s Health Care London, including St. Joseph’s Post-Acute COVID-19 Program. Participants were those with presumed long COVID, hospital inpatients with acute COVID-19 infection and healthy control subjects.

“We chose to study blood vessels that link all the body systems together to look for changes after an acute infection,” explains Dr. Fraser, who is also a Professor at Western University’s Schulich School of Medicine & Dentistry.

The team found that blood vessels of those with presumed long COVID were changing rapidly after a confirmed COVID-19 infection. They also found that patients with long COVID had 14 elevated blood biomarkers associate with blood vessels. With the help of machine learning, they discovered that two biomarkers called ANG-1 and P-SEL could be used to classify long COVID with 96 per cent accuracy. 

“Long COVID is a relatively new condition and we have much to learn about it,” says Dr. Michael Nicholson, Associate Scientist at Lawson, Respirologist at St. Joseph’s and Associate Professor at Schulich Medicine & Dentistry. “This research advances our understanding of long COVID with the potential to improve diagnosis and patient care.”

The advantage of biomarkers is that they not only help diagnose a disease but also provide insight into potential treatments. The team is now focused on using their findings to create a clinical diagnostic test with a goal of also exploring therapeutics.

“With a point-of-care diagnostic test, we could confidently diagnose long COVID and eventually develop targeted therapeutics against these blood vessel changes that we have discovered,” says Dr. Fraser. “The ultimate goal is to improve patient outcomes following a long COVID diagnosis.”

This research was supported by funding from London Health Sciences Foundation, London Community Foundation and the AMOSO Innovation Fund. It builds on a growing body of COVID-19 research from scientists at Lawson Health Research Institute. 
 

LONDON, ON - The COVID-19 pandemic has had a tangible impact on the mental health and wellbeing of Canadian health care workers, who have faced challenges that include increased workloads, resource constraints and fears of exposure to COVID-19.

Announced today, researchers out of Lawson Health Research Institute's MacDonald Franklin OSI Research Centre, have received $2.8 million in funding from the Public Health Agency of Canada (PHAC) to launch a project that will support the mental health and wellbeing of Canadian health care workers. The project is titled “Promoting Resilience and Mental Health: Adapting Canada’s Department of National Defence Road to Mental Readiness (R2MR) Program to Support Canadian Health Care Workers.”

The project will adapt the current Road to Mental Readiness Program, created for the Canadian Military. The aim is to identify mental health and wellness barriers in health care institutions, and create a streamlined framework that will build and promote supportive environments within institutions across the nation. 

“This program has been a personalized approach with the military, and we are now adapting it to focus on Canadian health care workers,” explains Dr. Anthony Nazarov, Associate Scientist at Lawson and the MacDonald Franklin OSI Research Centre at St. Joseph’s Health Care London. “We want to educate institutions to create an environment that supports wellness not just at the individual level, but at the institutional level as well.”

The project, which will span 14 months, will assist in the planning, adaptation and testing of the health care focused Road to Mental Readiness Program.

“One of the main reasons we felt this was necessary stems from a recent study our team conducted that focused on moral distress and the mental health of Canadian health care workers,” says Dr. Don Richardson, Lawson Scientist and Director of the MacDonald Franklin OSI Research Centre at St. Joseph’s. “Our preliminary study results found that many Canadian health care workers have been negatively impacted by the pandemic with conditions such as; posttraumatic stress disorder, stress and depression.” 

Once the research team has adapted the current Road to Mental Readiness Program, they will test it with health care workers to confirm its efficacy.

“We hope to have this type of resiliency program adopted by health care organizations across the country,” explains Dr. Richardson. “If proven effective, this would provide additional tools to health care workers to help them cope, improve their resiliency and hopefully mitigate future staff shortages.”

The funding is part of the federal 2021 budget which has committed an investment of $50 million over two years to support projects that address posttraumatic stress disorder and trauma in frontline and essential workers, and others affected by the pandemic. The nine projects announced, totaling an investment of $28.2 million, is the first round of projects being supported through this Budget 2021 commitment.

LONDON, ON – As part of an initiative called the Global Consortium for Chemosensory Research (GCCR), scientists at Lawson Health Research Institute and Western University are studying the sudden loss of smell in COVID-19 patients. They are asking individuals with confirmed or presumptive cases of COVID-19 worldwide to participate in a survey to better understand this symptom.

A sudden loss of smell, called anosmia, has been widely reported as a marker of COVID-19. More research is needed but emerging evidence suggests that more than 60 per cent of COVID-19 patients experience anosmia and that it is often the first symptom of the disease. 

“While a sudden loss of smell is relatively rare, it is most commonly caused by an upper respiratory tract infection. It therefore stands to reason that COVID-19 could be causing anosmia,” says Dr. Leigh Sowerby, Associate Scientist at Lawson and Associate Professor at Western University’s Schulich School of Medicine & Dentistry. “Colleagues in the United Kingdom first made note of this with a surge of patients presenting with sudden loss of smell and many of these patients went on to develop COVID-19.”

In the new study, patients with loss of smell will answer questions through a publicly accessible survey. They will be asked about their experiences with COVID-19 and other respiratory illnesses. An immediate goal is to better understand the association between anosmia and COVID-19, and determine if loss of smell is the same in symptomatic and asymptomatic patients. The team also hopes to determine if loss of smell happens before other symptoms of COVID-19 as it could allow for earlier self-isolation advice.

“As a sinus surgeon, I see many patients who have lost their sense of smell. It really is the forgotten sense; we don’t appreciate smell until it’s gone,” explains Dr. Sowerby, who is also an Otolaryngologist at St. Joseph’s Health Care London. “Smell is a very important part of taste. Imagine if all food tasted like cardboard, and all you could do was make that cardboard taste spicy, salty, sweet or bitter. It can also be a safety concern if you cannot smell a gas leak, burning food or smoke.”

While there are existing therapies that can aid in regaining a sense of smell, it’s currently unknown whether they are effective for COVID-19 patients. 

“We don’t yet know the long-term consequences of anosmia in COVID-19 patients and that’s why this research is important,” adds Dr. Sowerby. “I encourage anyone who has been diagnosed with COVID-19 or another respiratory illness to complete our survey if able.”

The GCCR survey is currently available in 10 languages at www.covidandsmell.com. 

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LONDON, ON – Researchers at Lawson Health Research Institute (Lawson) and Western University have teamed up with local biotech company, Diagnostics Biochem Canada Inc. (DBC), to help us better understand COVID-19 and the body’s immune response to the infection. 

A recently published study followed 28 critically ill patients at London Health Sciences Centre (LHSC); 14 who tested positive for COVID-19 and 14 who tested negative. They also followed 14 mildly ill non-hospitalized patients with COVID-19 and 14 healthy controls. The researchers tracked their body’s immune responses and found that all COVID-19 positive patients had a robust antibody response to the infection, even those with poorer outcomes.   

“Our previous research showed that in severe cases of COVID-19, the body produces what’s called a cytokine storm, or an intense, initial immune response. However, in this new study, we observed that after a few days and weeks in critical care, the body produced a later, humoral antibody response that is equivalent to what we would expect with any similar infection,” explains Dr. Douglas Fraser, lead researcher and Critical Care Physician at LHSC. 

Patients with COVID-19 reacted to the infection and produced ample anti-SARS-CoV-2 antibodies, including those who passed away. This finding suggests that blunted immune responses – when there is a lack of antibody production - did not contribute to mortality. Dr. Fraser says that based on their data, the focus of treatment should shift to combatting the viral load a person receives, and the body’s more immediate reaction to the infection. 

This research was made possible through a collaboration between Lawson, Western and DBC, with DBC providing the serological testing kits. 

“DBC was the first Canadian company to launch Health Canada-authorized serological tests for COVID-19 and we are happy that our scientists have been working with Lawson on this important study. We look forward to continuing this collaboration and supplying Canadian labs with much needed serological tests,” says Manon Hogue, CEO at DBC. 

Analyzing serum antibody levels using a blood test could help improve patient outcomes by allowing early identification of who may require certain treatments, and guide decisions around patient cohorting. In addition, serological testing allows for viral surveillance and its immunity in the community. 

London West MP, Kate Young adds, “London is once again showing the world that we are leading the way in scientific research into our most pressing health issues. It’s great to see a local business, Diagnostics Biochem Canada Inc., team up with the Lawson Health Research Institute to help better understand Covid-19.  Working together they will help us unlock the keys to how Covid-19 impacts the body’s immune system.” 

The study, “Critically Ill COVID-19 Patients Exhibit Anti-SARS-CoV-2 Serological Responses,” is published in the journal Pathophysiology. 

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LONDON, ON – Researchers at Lawson Health Research Institute have launched a pilot study and pilot project called Queer in the Classroom, to examine the benefits of a proactive, inclusive approach within the education system for those who are part of the 2SLBTGQIA+ student community.

“The Queer in the Classroom initiative is so important because when we look at the data, youth in the 2SLGBTQIA+ community are 14 times more likely to die by suicide,” says Dr. Arlene MacDougall, Lawson Scientist, Director of MINDS and Psychiatrist at St. Joseph’s Health Care London. “We need to be focusing on this population who are also experiencing a higher degree of isolation, stigma and substance use.”

The pilot project focuses on professional development for teachers and staff to help create an environment that is tailored to best support 2SLGBTQIA+ students through the additional stress they face as a minority group. 

“This project is about connecting with school boards and teachers to help develop the knowledge and skills to create spaces that go beyond tolerating differences,” explains MacDougall. “The focus is to create an environment that is more affirming, that is more responsive and more proactive rather than reactive.”

The foundation for the pilot project came from a scoping review of existing research on this topic conducted by the research team through the Mental Health INcubator for Disruptive Solutions (MINDS), that looked extensively at how teachers themselves can create a classroom that embraces all students. 

“We further conducted our own research based on a series of interviews of 2SLGBTQIA+ students at both elementary and secondary schools in Ontario, and their parents and teachers. We focused on not only their safety in school, but also being celebrated for who they are,” says Iylah Neves, Lawson Research Assistant through MINDS.  “We drew on all of this research to best inform the practices we are using with the Queer in the Classroom initiative.”

Currently the Queer in the Classroom project is being rolled out on a ‘by-request’ basis. However, the research team is working with a couple of school boards within Ontario to discuss the possibility of wider implementation.

“Queer in the Classroom has been driven by the voices of students with personal experiences who feel there is a deep need for this type of innovation,” says Neves. “It is our responsibility to make those changes so that students can access a safe, inclusive and nurturing environment.”

LONDON, ON – Lawson Health Research Institute has been awarded over $2 million in federal funding for a project focusing on two unique medical imaging systems designed to give unparalleled insight into brain function and disease.  

Today, the Right Honourable Justin Trudeau, Prime Minister of Canada, announced more than $518 million in research infrastructure support through the Canada Foundation for Innovation (CFI). In a live conversation today at 1 p.m., the Honourable François-Philippe Champagne, Minister of Innovation, Science and Industry, will share more about how the funding will support 102 state-of-the-art projects at 35 post-secondary institutions and research hospitals across the country - helping Canada remain at the forefront of exploration, innovation and discovery. 

“Imaging technologies, such as MRI and PET scanners, have revolutionized our understanding and treatment of major neurological diseases, including dementia and mental illness, by allowing us to study disease mechanisms and their impact on brain health,” says Dr. Keith St. Lawrence, Lawson Scientist and project co-lead. “We are developing and testing two leading-edge systems that will enable imaging of key vascular, metabolic and molecular factors linked to disease.”  

The first system is a head-only PET (positron emission tomography) insert that can be placed in any clinical MRI machine. Combining the molecular specificity of PET with the structural and functional capabilities of MRI, the possibilities for brain imaging will be greatly enhanced. The head-only PET insert being tested in London has been developed by Cubresa Inc., located in Winnipeg, Manitoba.  

“Combined with deep-learning approaches, we could achieve a highly improved sensitivity of the PET insert and reduce the radiation dose by up to 50 times compared to whole-body imaging,” explains Dr. Jonathan Thiessen, Lawson Scientist and project co-lead. “This will be the first commercially available high-resolution brain PET/MRI installed in the world.”  

For example, better diagnosis of different forms of dementias would be possible and researchers could closely compare protein abnormalities in the brain with cognitive function. The low radiation dose allows for long-term studies investigating changes in the brain and neuroinflammation that can lead to major psychiatric diseases and cognitive degeneration or disability. 

The second system uses portable, state-of-the-art optical imaging to increase the reliability of bedside brain monitoring to provide rapid assessment of brain health in restrictive environments.   

“We believe this technology will demonstrate how biomedical optics can improve neurological outcome for surgery and patients in intensive care, provide an accessible technology for assessing neurovascular health, and become a clinically relevant tool for monitoring changes in brain function,” says Dr. St. Lawrence.  

With current systems, the type of data is limited and extremely vulnerable to signal contamination from the scalp which can overshadow signals from the brain. Using the team’s specialized detection approach, the scalp signal contributions could be greatly reduced to get more accurate information on markers of brain activity, such as cerebral blood flow and energy metabolism.  

The team will study use of the system in surgical and intensive-care settings to monitor for cerebral ischemia and metabolic stress, which are the major causes of brain injury. They will also monitor treatment in patients with schizophrenia and study dysfunction in the brain associated with negative symptoms, as cognitive impairment deteriorates with age for some people with the disease. Another goal is to develop a brain-computer interface for patients who are incapable of physical communication. 

“With this funding, we can develop a truly unique advancement that has the potential to test the limits of optics for brain applications,” adds Dr. Thiessen. These two imaging platforms build on previous investments in Lawson Imaging that now exceed over $40 million in research funds since the initial CFI support in hybrid imaging in 2007.

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LONDON, ON – Researchers in London have been awarded $1.345 million over five years through the second phase of the Canadian Consortium on Neurodegeneration in Aging (CCNA), announced today as part of Canada’s national dementia strategy. CCNA is a collaborative research program tackling the challenge of dementia and other neurodegenerative illnesses. 

Dr. Manuel Montero-Odasso, Scientist at Lawson Health Research Institute, is world renowned for his findings on the relationship between cognition and mobility in the elderly, and gait as a predictor of frailty and dementia. He leads the Mobility, Exercise and Cognition (MEC) Team in London, comprised of top researchers in the areas of mobility, exercise and brain health.

“Evidence from other countries with national dementia strategies shows that coordinated, targeted efforts at the national level improves results for all aspects of dementia care and also for research,” says Dr. Montero-Odasso, also a geriatrician and Director of the Gait and Brain Lab at Parkwood Institute, a part of St. Joseph’s Health Care London. 

CCNA was purpose-built to synergize dementia research within the Canadian context. Phase I saw the creation of infrastructure fostering collaboration amongst Canadian researchers, and there are now 20 teams built around important research topics. 

“This kind of effective national collaboration by scientists and clinicians from many disciplines gives the CCNA a cutting edge in research, prevention, treatment and management of all forms of dementia,” explains Dr. Montero-ODasso. “We created a national network of researchers form west to east coast with a high level of expertise to deliver lifestyle interventions to improve cognition and slow down progression to dementia. I feel privileged working with such excellent investigators and leading this important endeavour locally.” 

The MEC team has several projects in the works, but the majority of the new funding is to complete the SYNERGIC Trial, SYNchronizing Exercises and Remedies on Gait and Cognition. 

This first-in-the-world clinical study is testing a triple intervention aimed at treating Mild Cognitive Impairment (MCI) and delaying the onset of dementia. The SYNERGIC Trial incorporates physical exercises and cognitive training, along with vitamin D supplementation to determine the best treatment for improving mobility and cognition. 

“We are looking at how interventions will work together and targeting cognitive decline at its earliest stage – individuals with MIC,” explains Dr. Montero-Odasso. “Both physical and cognitive exercises have shown promising effects for maintaining cognition, while vitamin D deficiency is associated with cognitive decline.” 

A professor at Western University’s Schulich Medicine & Dentistry, Dr. Montero-Odasso partners with researchers from across the city including Dr. Rob Bartha, imaging scientist at Schulich Medicine & Dentistry and Robarts Research Institute at Western University, and Dr. Kevin Schoemaker who leads the Laboratory for Brain and Heart Health. 

Study participants in the SYNERGIC Trial are asked to complete an individualized and progressive routine of exercises and cognitive training three times a week for six months, with one final assessment at 12 months. The main site for the study is Parkwood Institute with the physical exercises taking place at the Labatt Health Sciences Building on the Western campus.

“Our preliminary analysis is giving us a strong indication that a multimodal approach, combining physical exercise, cognitive training and supplementation, has a synergistic effect. It seems the whole is greater than the sum of its parts,” says Dr. Montero-Odasso. 

To date, 138 research patients has been recruited across multiple sites in Canada. Individuals over 60 years old with mild cognitive impairment without dementia are eligible for this clinical trial. Those interested in participating are encouraged to contact a Lawson research coordinator at 519-685-4292 ext. 42910. 

Dr. Montero-Odasso adds that “as our population ages, a comprehensive strategy is vital to ensure the growing number of those living with dementia receive the care and support they deserve. Over half a million Canadians are currently living with dementia. By 2031, this number is expected to nearly double.” More than one third of dementia cases might be preventable. 

'In CCNA’s Phase II, researchers are working on analyzing the overall health of every patient in a large clinical cohort study, COMPASS-ND. This information will be used to enhance understanding of how changes in the brain affect dementia severity and ways to reduce and prevent this through lifestyle changes. Lawson is the leading recruitment site for COMPASS-ND and the London team will be instrumental in the larger lifestyle interventions moving forward.

CCNA is funded by the Government of Canada, Canadian Institutes of Health Research (CIHR) and other funding partners. 
 

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