Should the test prove clinically viable, it could lead to new biomarkers for eye disease diagnostics and a new assay for clinical laboratories
Scientists at Flinders University in Australia have developed a genetic blood or saliva test that, they say, is 15 times more effective at identifying individuals at high risk of glaucoma than current medical laboratory tests.
If so, this discovery could lead to new biomarkers for diagnostic blood tests that help medical professionals identify and treat various diseases of the eye. Their test also can be performed on saliva samples. The researchers plan to launch a company later in 2022 to generate an accredited test that can be used in clinical trials.
“Early diagnosis of glaucoma can lead to vision-saving treatment, and genetic information can potentially give us an edge in making early diagnoses, and better treatment decisions,” said lead researcher Owen Siggs, PhD, Associate Professor, College of Medicine and Public Health at Flinders University, in a university press release.
Flinders University researchers have been collaborating with scientists at the QIMR Berghofer Medical Research Institute and other research institutes worldwide for some time to identify genetic risk factors for glaucoma, the press release noted.
“In the cross-sectional study of monogenic and polygenic variants related to the disease, the new genetic test was evaluated in 2,507 glaucoma patients in Australia and 411,337 people with or without glaucoma in the UK. The test, conducted using a blood or saliva sample, could potentially detect individuals at increased risk before irreversible vision loss happens,” Medical Device Network reported.
“Genetic testing is not currently a routine part of glaucoma diagnosis and care, but this test has the potential to change that,” said Jamie Craig, PhD, (above), Distinguished Professor, College of Medicine and Health at Flinders University in Australia and senior author of the study, in a press release. “We’re now in a strong position to start testing this in clinical trials,” he added. This is yet another example of how new research is identifying a novel biomarker that could be incorporated into a clinical laboratory test. (Photo copyright: Flinders University.)
Who Is at Risk for Glaucoma?
Glaucoma is a group of eye diseases that are typically caused by a buildup of pressure within the eye. The eyeball contains and produces a fluid called aqueous humour which provides nutrition to the eye and keeps the eye in a proper pressurized state. Any excess of this fluid should be automatically released via a drainage canal called the trabecular meshwork.
But that’s not always the case. When the fluid cannot drain properly, intraocular pressure is created. Most forms of glaucoma are characterized by this pressure, which can damage the optic nerve and eventually cause vision loss and even blindness. Treatments for the disease include medications, laser treatments, and surgery.
Anyone can develop glaucoma, but according to the Mayo Clinic, individuals at higher risk of the disease include:
Individuals over the age of 60.
Those with a family history of glaucoma.
People of African, Asian, or Hispanic descent.
Patients with certain medical conditions, such as diabetes, heart disease, high blood pressure, and sickle cell anemia.
Those with corneas that are thin in the center.
Individuals who have had a past eye injury or certain types of eye surgery.
People who have taken corticosteroid medications, especially eyedrops, for an extended period of time.
Glaucoma is the second leading cause of blindness worldwide, particularly among the elderly. When diagnosed early, the condition is manageable, but even with treatment, about 15% of glaucoma patients become blind in at least one eye within 20 years.
According to the federal Centers for Disease Control and Prevention (CDC), approximately three million Americans are living with glaucoma. The disease often has no early symptoms, which is why it is estimated that about 50% of individuals who have glaucoma do not realize they have the illness.
Thus, a clinically-viable genetic test that is 15 times more likely to identify people at risk for developing glaucoma in its early stages would be a boon for ophthalmology practices worldwide and could save thousands from going blind.
More research and clinical trials are needed before the Flinders University genetic test for glaucoma becomes available. But the discovery alone demonstrates the importance of continuing research into identifying novel biomarkers that could be incorporated into useful clinical laboratory diagnostic tests.
Last-minute court injunction stopped a mass walkout, but allied health workers continue to push country’s District Health Boards for improvements
In New Zealand, the unprecedented surge in PCR COVID-19 testing due to the SARS-CoV-2 Omicron variant appears to have pushed the country’s 10,000 healthcare workers—including 4,000 medical laboratory scientists and technicians—to the breaking point.
On March 3, just 24 hours before the first of two walkouts was scheduled to begin, New Zealand’s Employment Court banned the strike that would have shut down medical laboratories in the country’s mixed public-private healthcare system. Medical laboratory workers make up 40% of the nation’s 10,000 healthcare workers who planned the nationwide strike to protest low pay and poor working conditions, according to 1News.
New Zealand’s Public Service Association (PSA) is the country’s largest trade union representing more than 80,000 workers across government, state-owned enterprises, local councils, health boards, and community groups.
The PSA’s 10,000 health workers (which includes 4,000 medical laboratory workers) had planned to strike on March 4-5 and March 18-19, but, according to the New Zealand Herald the Employment Court stopped the walkouts due to the rise in COVID-19-related hospitalizations.
The Herald noted, however, that PSA union members in Auckland had already postponed their walkout after county District Health Boards (DHB) expressed concern over patient safety.
“Striking has always been our last resort, and our members in Auckland continue to demonstrate their commitment to providing quality healthcare to New Zealanders by working tomorrow,” PSA Organizer Will Matthews told the Herald.
He insisted, however, that DHBs need to respond to workers’ concerns. “The depth of feeling from our members, and the support for industrial action nationwide is unprecedented,” Matthews told 1News. “We are now in a position where strike action is our only remaining option to get the DHBs and the government to listen.”
In an interview with Stuff, medical laboratory scientist Terry Taylor (above), president of the New Zealand Institute of Medical Laboratory Science, acknowledged laboratory workers’ commitment to doing the work, but he is concerned about the next big testing surge. “Goodwill only goes a certain distance in the end when people are knackered and not getting what they need. At the moment, we have the capability to do 50,000 to 60,000 [tests] per day throughout the whole country, but we couldn’t run that for more than a week. We’d be dead, we’d be overrun,” he said. Clinical laboratory leaders in this country may want to make note of Taylor’s concerns, as laboratory conditions in this country become stressed as well. (Photo copyright: Newshub.)
While no new strike dates have been set, Matthews said striking workers would include contact tracers and laboratory staff as well as nearly 70 other groups of healthcare workers, many of whom “don’t even earn a living wage.” According to Peoples Dispatch, allied health workers are working under the terms of a contract that expired in 2020.
The starting salary for a DHB medical laboratory scientist after completing a four-year degree is NZ$56,773 (US$39,519), while lab assistants and technicians start out at less than NZ$50,000 (US$34,804), Stuff reported.
In an interview with 1News, Taylor maintained that diagnostic labs in New Zealand have long been understaffed, undervalued, and their workers poorly treated. The COVID-19 pandemic, he says, has exacerbated an ongoing problem. Issues such as space constraints, for example, have become even more problematic.
“We’ve got extra machinery that’s come into the labs, we don’t get any more space, all these consumables sitting all over hallways and corridors, extra staff coming in to do the stuff,” Taylor told RNZ. “So, we’ve lost all our tearooms, we’ve lost all our office space, our conditions are markedly less than they should be.”
1News points out that the country’s medical laboratory scientists and technicians are processing more than 20,000 PCR COVID-19 tests per day in addition to running 120,000 other samples and 200,000 diagnostic tests. At the end of March 2020, the average number of COVID-19 tests processed per day was 1,777.
While New Zealand has preached to its citizens the need for widespread PCR testing, Taylor argued in February 2022 that the country must change its approach to offering PCR testing only to symptomatic individuals and close contacts.
“To run our diagnostic laboratories into the ground with endless irrelevant testing is a direct reflection of poor foresight, planning, and respect for the role of this critical health workforce,” Taylor told Newshub.
Necessity of Rewarding All Medical Laboratory Personnel
Medical laboratory scientist Bryan Raill is president of Apex, a specialist union of allied, scientific and technical employees. Raill told 1News the long-term solution is for the government to address pay equity, staffing levels, and worker wellbeing in the country’s historically undervalued medical laboratories.
“Medical laboratory scientists and technicians have to be fairly rewarded for the training, skill, and expertise they bring to the health system,” Raill said. “Medical laboratory scientists need a timely, fair, and equitable process to determine their worth.”
While the stresses on New Zealand medical laboratory workers are not identical, US clinical laboratory leaders will want to monitor the lengths to which New Zealand’s laboratory workers are willing to go to force improvements in their working conditions, staffing, and pay.
As the noted above, the government-funded health system is continually strapped for funds. Consequently, the health districts often defer capital investment in hospitals and medical laboratories. That is one reason why lab staff can find themselves working in space that is inadequate for the volume of specimens which need to be tested daily.
Many of the mutations were found at sites on the spike protein where antibodies bind, which may explain why the Omicron variant is more infectious than previous variants
Scientists at the University of Missouri (UM) now have a better understanding of why the SARS-CoV-2 Omicron variant is more infectious than previous variants and that knowledge may lead to improved antivirals and clinical laboratory tests for COVID-19.
As the Omicron variant of the coronavirus spread across the globe, scientists noted it appeared to be more contagious than previous variants and seemed resistant to the existing vaccines. As time went by it also appeared to increase risk for reinfection.
The UM researchers wanted to know why. They began by examining the Omicron variant’s mutation distribution, its evolutionary relationship to previous COVID-19 variants, and the structural impact of its mutations on antibody binding. They then analyzed protein sequences of Omicron variant samples collected from around the world.
“We know that viruses evolve over time and acquire mutations, so when we first heard of the new Omicron variant, we wanted to identify the mutations specific to this variant,” said Kamlendra Singh, PhD, Associate Research Professor, Department of Veterinary Pathobiology at UM’s College of Veterinary Medicine (CVM), in a UM press release.
Kamlendra Singh, PhD (above), an associate research professor in the Department of Veterinary Pathobiology at UM’s College of Veterinary Medicine, led the team that identified 46 mutations of the SARS-CoV-2 Omicron variant. “I went to India last April and I got infected by the Delta variant. So, it then became personal to me,” he told NBC affiliate KOMU. The UM team hopes their findings lead to improvements in existing COVID-19 antivirals and clinical laboratory tests. (Photo copyright: University of Missouri.)
In their paper, the UM team wrote, “Here we present the analyses of mutation distribution, the evolutionary relationship of Omicron with previous variants, and probable structural impact of mutations on antibody binding. … The structural analyses showed that several mutations are localized to the region of the S protein [coronavirus spike protein] that is the major target of antibodies, suggesting that the mutations in the Omicron variant may affect the binding affinities of antibodies to the S protein.”
There are a total of 46 highly prevalent mutations throughout the Omicron variant.
Twenty-three of the 46 mutations belong to the S protein (more than any previous variant).
Twenty-three of 46 is a markedly higher number of S protein mutations than reported for any SARS-CoV-2 variant.
A significant number of Omicron mutations are at the antibody binding surface of the S protein.
“Mutation is change in the genome that results in a different type of protein,” Singh told NBC affiliate KOMU. “Once you have different kinds of protein after the virus and the virus attacks the cell, our antibodies do not recognize that, because it has already been mutated.”
Omicron Mutations Interfere with Antibody Binding
Of the 46 Omicron variant mutations discovered by the UM researchers, some were found in areas of the coronavirus’ spike protein where antibodies normally bind to prevent infection or reinfection.
“The purpose of antibodies is to recognize the virus and stop the binding, which prevents infection,” Singh explained. “However, we found many of the mutations in the Omicron variant are located right where the antibodies are supposed to bind, so we are showing how the virus continues to evolve in a way that it can potentially escape or evade the existing antibodies, and therefore continue to infect so many people.”
These findings explain how the Omicron variant bypasses pre-existing antibodies in a person’s blood to cause initial infection as well as reinfection.
The UM team hopes their research will help other scientists better understand how the SARS-CoV-2 coronavirus has evolved and lead to future clinical laboratory antiviral treatments.
“The first step toward solving a problem is getting a better understanding of the specific problem in the first place,” Singh said. “It feels good to be contributing to research that is helping out with the pandemic situation, which has obviously been affecting people all over the world.”
Singh and his team have developed a supplement called CoroQuil-Zn designed to reduce a patient’s viral load after being infected with the SARS-CoV-2 coronavirus. The drug is currently being used in parts of India and is awaiting approval from the US Food and Drug Administration (FDA).
New discoveries about SARS-CoV-2 and its variants continue to further understanding of the coronavirus. Research such as that performed at the University of Missouri may lead to new clinical laboratory tests, more effective treatments, and improved vaccines that could save thousands of lives worldwide.
Like Holmes, Balwani faces 12 counts of fraud and conspiracy to commit wire fraud for allegedly misleading investors, patients, and others about blood-testing startup’s technology
Clinical laboratory managers and pathologists are buckling up as the next installment of the Theranos story gets underway, this time for the criminal fraud trial of ex-Theranos President and COO Ramesh “Sunny” Balwani.
In one text to Holmes, Balwani wrote, “I am responsible for everything at Theranos,” NBC Bay Area reported.
Partners in Everything, including Crime, Prosecutors Allege
According to the Wall Street Journal (WSJ), prosecutors are following the Holmes trial playbook. They focused their opening arguments on the personal and working relationships between the pair, tying Balwani to Holmes’ crimes at the Silicon Valley blood-testing startup.
As second in command at Theranos, Balwani helped run the company from 2009 to 2016. He also invested $5 million in Theranos stock, while also underwriting a $13 million corporate loan.
“They were partners in everything, including their crimes,” Assistant US Attorney Robert Leach told jurors, the Mercury News reported. “The defendant and Holmes knew the rosy falsehoods that they were telling investors were contrary to the reality within Theranos.”
Leach maintained that Balwani was responsible for the phony financial projections Theranos gave investors in 2015 predicting $990 million in revenue when the company had less than $2 million in sales.
Former Theranos President and COO Ramesh “Sunny” Balwani (above) is seen arriving at the federal court in San Jose, California, for the start of his federal fraud trial. Clinical laboratory leaders and pathologists who followed the trial of ex-Theranos founder and CEO Elizabeth Holmes will no doubt be interested in what can be learned from this trail as well. (Photo copyright: Jim Wilson/The New York Times.)
“This is a case about fraud. About lying and cheating to obtain money and property,” Leach added. Balwani “did this to get money from investors, and he did this to get money and business from paying patients who were counting on Theranos to deliver accurate and reliable blood tests so that they could make important medical decisions,” the WSJ reported.
Defense attorneys downplayed Balwani’s decision-making role within Theranos, pointing out that he did not join the start-up until six years after Holmes founded the company with the goal of revolutionizing blood testing by developing a device capable of performing blood tests using a finger-prick of blood.
“Sunny Balwani did not start Theranos. He did not control Theranos. Elizabeth Holmes, not Sunny, founded Theranos and built Theranos,” defense attorney Stephen Cazares, JD of San Francisco-based Orrick, said in his opening argument, the WSJ reported.
The trial was expected to begin in January but was delayed by the unexpected length of the Holmes trial. It was then pushed out to March when COVID-19 Omicron cases spiked in California during the winter.
Balwani’s trial is being held in the same San Jose courthouse where Holmes was convicted. Balwani, 56, is facing identical charges as Holmes, which include two counts of conspiracy to commit wire fraud and 10 counts of wire fraud. He has pleaded not guilty.
Holmes, who is currently free on a $500,000 bond, will be sentenced on Sept. 26, Dark Daily reported in January.
Judge Excludes Jurors for Watching Hulu’s ‘The Dropout’
During jury selection in March, some jurors acknowledged they were familiar with the case, causing delays in impaneling the 12-member jury and six alternates. US District Court Judge Edward Davila excluded two potential jurors because they had watched “The Dropout,” Hulu’s miniseries about Holmes and Theranos. Multiple other jurors were dropped because they had followed the Holmes trial in the news, Law360 reported.
When testimony began, prosecutors had a familiar name take the stand—whistleblower and former Theranos lab tech Erika Cheung, who provided key testimony in the Holmes trial. During her testimony, Cheung said she revealed to authorities what she saw at Theranos because “Theranos had gone to extreme lengths to [cover up] what was happening in the lab,” KRON4 in San Francisco reported.
“It was important to report the truth,” she added. “I felt that despite the risk—and I knew there could be consequences—people really need to see the truth of what was happening behind closed doors.”
Nevada State Public Health Laboratory (NSPHL) Director Mark Pandori, PhD, who served as Theranos’ lab director from December 2013 to May 2014, was the prosecution’s second witness. Pandori testified that receiving accurate results for some tests run through Theranos’ Edison blood testing machine was like “flipping a coin.”
“When you are working in a place like Theranos, you’re developing something new. And you want it to work. Quality control remained a problem for the duration of my time at the company. There was never a solution to poor performance,” Pandori testified, according to KRON4.
While the defense team has downplayed Balwani’s decision-making role—calling him a “shareholder”—Aron Solomon, JD, a legal analyst with Esquire Digital, maintains they may have a hard time convincing the jury that Balwani wasn’t a key player.
“There’s no way the defense is going to be successful in painting Sunny Balwani in the light simply as a shareholder,” he told NBC Bay Area. “We know that, literally, Sunny Balwani was intimately involved with Theranos, because he was intimately involved with Elizabeth Holmes,” Solomon added.
Little Media Buzz for Balwani, Unlike Holmes Trial
While the Holmes trial hogged the media spotlight and drew daily onlookers outside the courthouse, reporters covering Balwani’s court appearances describe a much different atmosphere.
“The sparse crowd and quiet atmosphere at US District Court in San Jose, Calif., felt nothing like the circus frenzy that engulfed the same sidewalk months earlier when his alleged co-conspirator and former girlfriend, Elizabeth Holmes, stood trial on the same charges,” The New York Times noted in its coverage of the Balwani trial.
The Balwani trial may not reach the same headline-producing fervor as the Holmes legal battle. However, clinical laboratory directors and pathologists who follow these proceedings will no doubt come away with important insights into how Theranos went so terribly wrong and how lab directors must act under the Clinical Laboratory Improvement Amendments of 1988 (CLIA).
New nanotechnology device is significantly faster than typical rapid detection clinical laboratory tests and can be manufactured to identify not just COVID-19 at point of care, but other viruses as well
Researchers at the University of Central Florida (UCF) announced the development of an optical sensor that uses nanotechnology to identify viruses in blood samples in seconds with an impressive 95% accuracy. This breakthrough underscores the value of continued research into technologies that create novel diagnostic tests which offer increased accuracy, faster speed to answer, and lower cost than currently available clinical laboratory testing methods.
The innovative UCF device uses nanoscale patterns of gold that reflect the signature of a virus from a blood sample. UCF researchers claim the device can determine if an individual has a specific virus with a 95% accuracy rate. Different viruses can be identified by using their DNA sequences to selectively target each virus.
According to a UCF Today article, the University of Central Florida research team’s device closely matches the accuracy of widely-used polymerase chain reaction (PCR) tests. Additionally, the UCF device provides nearly instantaneous results and has an accuracy rate that’s a marked improvement over typical rapid antigen detection tests (RADT).
Debashis Chanda, PhD (above), holds up the nanotechnology biosensor he and his team at the University of Central Florida developed that can detect viruses in a blood sample in seconds with 95% accuracy and without the need for pre-preparation of the blood sample. Chanda is professor of physics at the NanoScience Technology Center and the College of Optics and Photonics (CREOL) at UCF. Should this detection device prove effective at instantly detecting viruses at the point of care, clinical laboratories worldwide could have a major new tool in the fight against not just COVID-19, but all viral pathogens. (Photo copyright: University of Central Florida.)
Genetic Virus Detection on a Chip
“The sensitive optical sensor, along with the rapid fabrication approach used in this work, promises the translation of this promising technology to any virus detection, including COVID-19 and its mutations, with high degree of specificity and accuracy,” Debashis Chanda, PhD, told UCF Today. Chanda is professor of physics at the NanoScience Technology Center at UCF and one of the authors of the study. “Here, we demonstrated a credible technique which combines PCR-like genetic coding and optics on a chip for accurate virus detection directly from blood.”
The team tested their device using samples of the Dengue virus that causes Dengue fever, a tropical disease spread by mosquitoes. The device can detect viruses directly from blood samples without the need for sample preparation or purification. This feature enables the testing to be timely and precise, which is critical for early detection and treatment of viruses. The chip’s capability also can help reduce the spread of viruses.
No Pre-processing or Sample Preparation Needed for Multi-virus Testing
The scientists confirmed their device’s effectiveness with multiple tests using varying virus concentration levels and solution environments, including environments with the presence of non-target virus biomarkers.
“A vast majority of biosensors demonstrations in the literature utilize buffer solutions as the test matrix to contain the target analyte,” Chanda told UCF Today. “However, these approaches are not practical in real-life applications because complex biological fluids, such as blood, containing the target biomarkers are the main source for sensing and at the same time the main source of protein fouling leading to sensor failure.”
The researchers believe their device can be easily adapted to detect other viruses and are optimistic about the future of the technology.
“Although there have been previous optical biosensing demonstrations in human serum, they still require off-line complex and dedicated sample preparation performed by skilled personnel—a commodity not available in typical point-of-care applications,” said Abraham Vazquez-Guardado, PhD, a Postdoctoral Fellow at Northwestern University who worked on the study, in the UCS Today article. “This work demonstrated for the first time an integrated device which separated plasma from the blood and detects the target virus without any pre-processing with potential for near future practical usages.”
More research and additional studies are needed to develop the University of Central Florida scientists’ technology and prove its efficacy. However, should the new chip prove viable for point-of-care testing, it would give clinical laboratories and microbiologists an ability to test blood samples without any advanced preparation. Combined with the claims for the device’s remarkable accuracy, that could be a boon not only for COVID-19 testing, but for testing other types of viruses as well.
