This is another approach to the liquid biopsy that clinical laboratories and pathologists may use to detect cancer less invasively
Screening for cancer usually involves invasive, often painful, costly biopsies to provide samples for diagnostic clinical laboratory testing. But now, scientists at the University of Technology (UTS) in Sydney, Australia, have developed a novel approach to identifying tumorous cells in the bloodstream that uses imaging to cause cells with elevated lactase to fluoresce, according to a UTS news release.
The UTS researchers created a Static Droplet Microfluidic (SDM) device that detects circulating tumor cells (CTC) that have separated from the cancer source and entered the bloodstream. The isolation of CTCs is an intrinsic principle behind liquid biopsies, and microfluidic gadgets can improve the efficiency in which problematic cells are captured.
The University of Technology’s new SDM device could lead the way for very early detection of cancers and help medical professionals monitor and treat cancers.
“Managing cancer through the assessment of tumor cells in blood samples is far less invasive than taking tissue biopsies. It allows doctors to do repeat tests and monitor a patient’s response to treatment,” explained Majid E. Warkiani, PhD, Professor, School of Biomedical Engineering, UTS, and one of the authors of the study, in a news release. Clinical laboratories and pathologists may soon have a new liquid biopsy approach to detecting cancers. (Photo copyright: University of New South Wales.)
Precision Medicine a Goal of UTS Research
The University of Technology’s new SDM device differentiates tumor cells from normal cells using a unique metabolic signature of cancer that involves the waste product lactate.
“A single tumor cell can exist among billions of blood cells in just one milliliter of blood, making it very difficult to find,” explained Majid E. Warkiani, PhD, a professor in the School of Biomedical Engineering at UTS and one of the authors of the study, in the news release.
“The new [SDM] detection technology has 38,400 chambers capable of isolating and classifying the number of metabolically active tumor cells,” he added.
“In the 1920s, Otto Warburg discovered that cancer cells consume a lot of glucose and so produce more lactate. Our device monitors single cells for increased lactate using pH sensitive fluorescent dyes that detect acidification around cells,” Warkiani noted.
After the SDM device has detected the presence of questionable cells, those cells undergo further genetic testing and molecular analysis to determine the source of the cancer. Because circulating tumor cells are a precursor of metastasis, the device’s ability to identify CTCs in very small quantities can aid in the diagnosis and classification of the cancer and the establishment of personalized treatment plans, a key goal of precision medicine.
The new technology was also designed to be operated easily by medical personnel without the need for high-end equipment and tedious, lengthy training sessions. This feature should allow for easier integration into medical research, clinical laboratory diagnostics, and enable physicians to monitor cancer patients in a functional and inexpensive manner, according to the published study.
“Managing cancer through the assessment of tumor cells in blood samples is far less invasive than taking tissue biopsies. It allows doctors to do repeat tests and monitor a patient’s response to treatment,” stated Warkiani in the press release.
The team have filed for a provisional patent for the device and plan on releasing it commercially in the future.
Other Breakthroughs in MCED Testing
Scientists around the world have been working to develop a simple blood test for diagnosing cancer and creating optimal treatment protocols for a long time. There have been some notable breakthroughs in the advancement of multi-cancer early detection (MCED) tests, which Dark Daily has covered in prior ebriefings.
According to the Centers for Disease Control and Prevention (CDC), cancer ranks second in the leading causes of death in the US, just behind heart disease. There were 1,603,844 new cancer cases reported in 2020, and 602,347 people died of various cancers that year in the US.
According to the National Cancer Institute, the most common cancers diagnosed in the US annually include:
Cancer is a force in Australia as well. It’s estimated that 151,000 Australians were diagnosed with cancer in 2021, and that nearly one in two Australians will receive a diagnosis of the illness by the age of 85, according to Cancer Council South Australia.
The population of Australia in 2021 was 25.69 million, compared to the US in the same year at 331.9 million.
The development of the University of Technology’s static droplet microfluidic device is another approach in the use of liquid biopsies as a means to detect cancer less invasively.
More research and clinical studies are needed before the device can be ready for clinical use by anatomic pathology groups and medical laboratories, but its creation may lead to faster diagnosis of cancers, especially in the early stages, which could lead to improved patient outcomes.
Incident serves as a reminder that all clinical laboratories can be just one mistake away from reporting erroneous results to a number of doctors and patients
In May, more than 400 patients who agreed to take the Galleri multi-cancer early detection (MCED) blood test from GRAIL—a California-based biotechnology company that is owned by genetic technology developer Illumina—received letters falsely suggesting they had cancer, according to the Financial Times which broke the news.
The Times reported that a software error had caused GRAIL’s telemedicine provider PWNHealth, which is owned by Everly Health Solutions, to send an erroneous letter to 408 patients misinforming them that “they had a signal in their blood suggesting they could have cancer.”
In a statement, GRAIL said the letters were “in no way related to or caused by an incorrect Galleri laboratory test result” and that “the letters were inadvertently triggered by a PWNHealth software configuration issue, which had now been disabled,” Financial Times reported.
GRAIL, which stated that more than half of the people who received the letters hadn’t even had blood drawn for the test, also added that “no patient health information has been disclosed or breached due to this issue, and no patient harm or adverse events have been reported,” the Financial Times noted.
Nevertheless, it’s not hard to imagine the effect the letters had on those people. No clinical laboratory wants national headlines as a consequence of an error that causes incorrect test results to be reported to doctors and patients. How to prevent such occurrences is a challenge to all clinical laboratory managers.
According to GRAIL, its Galleri multicancer early detection test “can detect a signal shared by more than 50 cancer types and predict the tissue type or organ associated with the signal. At least 45 of these cancers lack recommended screening tests in the US today.” Clinical laboratories that draw the blood sample for the genetic test ship the collection kit directly to GRAIL’s laboratory for processing. (Photo copyright: GRAIL.)
What Went Wrong
PWNHealth said in a statement that the letters were sent due to “a misconfiguration of our patient engagement platform used to send templated communications to individuals,” CBS News reported.
Financial Times reported that the letters were issued from May 10-18, and on May 19 PWNHealth informed GRAIL of the problem. “We addressed the underlying problem within an hour of becoming aware of it and have implemented additional processes to ensure it does not happen again,” PWNHealth said. “In partnership with GRAIL, we started contacting impacted individuals within 36 hours.”
The software configuration fault was deactivated by PWNHealth, and GRAIL notified affected individuals via phone, email, and regular mail until all had been informed of the error, GRAIL said.
Though GRAIL reacted quickly, there has been fallout caused by the letters. Insurer confidence may have been damaged.
According to Financial Times, customers of life insurance company MassMutual and another unnamed insurer had “been affected” by the erroneous letters. As a result, MassMutual had suspended a pilot program and the unnamed insurer was “reviewing its relationship” with GRAIL.
About GRAIL and the Galleri Liquid Biopsy Test
GRAIL was founded in 2015 in San Francisco, California, with the goal of detecting early-stage cancer. They developed the Galleri liquid biopsy test which requires only one blood sample and can “detect a signal shared by over 50 types of cancer with 99.5% specificity and predict the cancer signal origin with high accuracy to help guide next steps,” according to the company’s website.
The $949 test can only be obtained by a doctor’s prescription. At this time it is not covered by insurance, Healthnews reported.
According to a GRAIL Galleri fact sheet, “All cells—cancer and healthy ones—shed DNA, which is called cell-free DNA (cfDNA), into the bloodstream. … After a blood sample is taken at a healthcare provider’s office or at a GRAIL partner laboratory, the Galleri test uses the power of next-generation sequencing and machine-learning algorithms to analyze cfDNA methylation patterns.
“The test uses these methylation patterns to determine if a cancer signal is present and, if so, predict the tissue type or organ where the cancer signal originated.
“If a cancer signal is detected, a healthcare provider will determine next steps for diagnostic evaluation, which may include personal and family health history, physical examination, and guideline directed evaluation(s) including lab work and imaging.”
Flashback to Another Notable Lab Error
This is not the first time inaccurate genetic test results have been sent out to patients.
In 2017, Dark Daily’s sister publication, The Dark Report, covered how genetic test developer Invitae Corporation had reported inaccurate genetic test results for up to 50,000 patients over a period of 11 months from September 2016 to July 2017.
In a statement, Invitae said the error occurred “because of the unique characteristics of how we we’re testing for the MSH2 Boland inversion, our quality control checks did not catch omission of the components of the assay. … As soon as the omission was recognized and relevant components returned to the assay, it once again performed properly. We have added two separate quality controls to ensure this issue will not reoccur.”
Negative Online Reviews Hurt Businesses including Clinical Laboratories
In its article, Status Labs references a 2021 PEW Research survey which found that “More than eight-in-10 US adults (86%) say they get news from a smartphone, computer, or tablet ‘often’ or ‘sometimes,’ including 60% who say they do so often. This is higher than the portion who get news from television, though 68% get news from TV at least sometimes and 40% do so often. Americans turn to radio and print publications for news far less frequently, with half saying they turn to radio at least sometimes (16% do so often) and about a third (32%) saying the same of print (10% get news from print publications often).”
Status Labs also cited studies showing the impact of negative press online. One study by Trustpilot showed that 90% of consumers said they will not frequent a business that has a bad reputation.
Another study by the University of Pennsylvania found that “negative reviews, messages, or rumors hurt product evaluations and reduce purchase likelihood and sales.”
Vigilance Is the Key
Clinical laboratory leaders are keenly aware that a lab’s reputation can make or break its business. This incident involving GRAIL and its telemedicine provider PWNHealth is a reminder that vendors providing services to medical laboratories can be a source of problems ranging from breaches of protected health information (PHI) to misstatements or misreporting of clinical laboratory test results.
Thus, it behooves lab managers to constantly monitor information leaving the lab, and to ensure all test results sent to patients and doctors are valid and accurate.
Though still in trials, early results show tests may be more accurate than traditional clinical laboratory tests for detecting prostate cancer
Within weeks of each other, different research teams in the US and UK published findings of their respective efforts to develop a better, more accurate clinical laboratory prostate cancer test. With cancer being a leading cause of death among men—second only to heart disease according to the Centers for Disease Control and Prevention (CDC)—new diagnostics to identify prostate cancer would be a boon to precision medicine treatments for the deadly disease and could save many lives.
Thus, these are two different pathways toward the goal of achieving earlier, more accurate diagnosis of prostate cancer, the holy grail of prostate cancer diagnosis.
“There is currently no single test for prostate cancer, but PSA blood tests are among the most used, alongside physical examinations, MRI scans, and biopsies,” said Dmitry Pshezhetskiy, PhD (above), Professorial Research Fellow at University of East Anglia and one of the authors of the UEA study. “However, PSA blood tests are not routinely used to screen for prostate cancer, as results can be unreliable. Only about a quarter of people who have a prostate biopsy due to an elevated PSA level are found to have prostate cancer. There has therefore been a drive to create a new blood test with greater accuracy.” With the completion of the US and UK studies, clinical laboratories may soon have a new diagnostic test for prostate cancer. (Photo copyright: University of East Anglia.)
East Anglia’s Research into a More Accurate Blood Test
Scientists at the University of East Anglia (UEA) worked with researchers from Imperial College in London, Imperial College NHS Trust, and Oxford BioDynamics to develop a new precision medicine blood test that can detect prostate cancer with greater accuracy than current methods.
The researchers evaluated their test in a pilot study involving 147 patients. They found their testing method had a 94% accuracy rate, which is higher than that of PSA testing alone. They discovered their test significantly improved the overall detection of prostate cancer in men who are at risk for the disease.
“When tested in the context of screening a population at risk, the PSE test yields a rapid and minimally invasive prostate cancer diagnosis with impressive performance,” Dmitry Pshezhetskiy, PhD, Professorial Research Fellow at UEA and one of the authors of the study told Science Daily. “This suggests a real benefit for both diagnostic and screening purposes.”
The UK scientists hope their test can eventually be used in everyday clinical practice as there is a need for a highly accurate method for prostate cancer screening that does not subject patients to unnecessary, costly, invasive procedures.
Cedars-Sinai’s Research into Nanotechnology Cancer Testing
Researchers from Cedars-Sinai Cancer took a different approach to diagnosing prostate cancer by developing a nanotechnology-based liquid biopsy test that detects the disease even in microscopic amounts.
Their test isolates and identifies extracellular vesicles (EVs) from blood samples. EVs are microscopic non-reproducing protein and genetic material shed by all cells. Cedars-Sinai’s EV Digital Scoring Assay accurately extracts EVs from blood and analyzes them faster than similar currently available tests.
“This research will revolutionize the liquid biopsy in prostate cancer,” said oncologist Edwin Posadas, MD, Medical Director of the Urologic Oncology Program and co-director of the Experimental Therapeutics Program in Cedars-Sinai Cancer in a press release. “The test is fast, minimally invasive and cost-effective, and opens up a new suite of tools that will help us optimize treatment and quality of life for prostate cancer patients.”
The researchers tested blood samples from 40 patients with prostate cancer. They found that their EV test could distinguish between cancer localized to the prostate and cancer that has spread to other parts of the body.
Microscopic cancer deposits, called micrometastases, are not always detectable, even with advanced imaging methods. When these deposits spread outside the prostate area, focused radiation cannot prevent further progression of the disease. Thus, the ability to identify cancer by locale within the body could lead to new precision medicine treatments for the illness.
“[The EV Digital Scoring Assay] would allow many patients to avoid the potential harms of radiation that isn’t targeting their disease, and instead receive systemic therapy that could slow disease progression,” Posadas explained.
Other Clinical Laboratory Tests for Prostate Cancer Under Development
According to the American Cancer Society, the number of prostate cancer cases is increasing. One out of eight men will be diagnosed with the illness during his lifetime. Thus, developers have been working on clinical laboratory tests to accurately detect the disease and save lives for some time.
In “University of East Anglia Researchers Develop Non-Invasive Prostate Cancer Urine Test,” Dark Daily reported on a urine test also developed by scientists at the University of East Anglia that clinical laboratories can use to not only accurately diagnose prostate cancer but also determine whether it is an aggressive form of the disease.
And in “UPMC Researchers Develop Artificial Intelligence Algorithm That Detects Prostate Cancer with ‘Near Perfect Accuracy’ in Effort to Improve How Pathologists Diagnose Cancer ,” we outlined how researchers at the University of Pittsburgh Medical Center (UPMC) working with Ibex Medical Analytics in Israel had developed an artificial intelligence (AI) algorithm for digital pathology that can accurately diagnose prostate cancer. In the initial study, the algorithm—dubbed the Galen Prostate AI platform—accurately detected prostate cancer with 98% sensitivity and 97% specificity.
More research and clinical trials are needed before the new US and UK prostate cancer testing methods will be ready to be used in clinical settings. But it’s clear that ongoing research may soon produce new clinical laboratory tests and diagnostics for prostate cancer that will steer treatment options and allow for better patient outcomes.
Researchers say their method can trace ancestry back 100,000 years and could lay groundwork for identifying new genetic markers for diseases that could be used in clinical laboratory tests Cheaper, faster, and more accurate genomic sequencing technologies are deepening scientific knowledge of the human genome. Now, UK researchers at the University of Oxford have used this genomic data to create the largest-ever human family tree, enabling individuals to trace their ancestry back 100,000 years....
MicroRNAs in urine could prove to be promising biomarkers in clinical laboratory tests designed to diagnose brain tumors regardless of the tumor’s size or malignancy, paving the way for early detection and treatment
Researchers at Nagoya University in Japan have developed a liquid biopsy test for brain cancer screening that, they claim, can identify brain tumors in patients with 100% sensitivity and 97% specificity, regardless of the tumor’s size or malignancy. Pathologists will be interested to learn that the research team developing this technology says it is simple and inexpensive enough to make it feasible for use in mass screening for brain tumors.
Neurologists, anatomic pathologists, and histopathologists know that brain tumors are one of the most challenging cancers to diagnose. This is partly due to the invasive nature of biopsying tissue in the brain. It’s also because—until recently—clinical laboratory tests based on liquid blood or urine biopsies were in the earliest stages of study and research and are still in development.
Thus, a non-invasive urine test with this level of accuracy that achieves clinical status would be a boon for the diagnosis of brain cancer.
Researchers at Japan’s Nagoya University believe they have developed just such a liquid biopsy test. In a recent study, they showed that microRNAs (tiny molecules of nucleic acid) in urine could be a promising biomarker for diagnosing brain tumors. Their novel microRNA-based liquid biopsy correctly identified 100% of patients with brain tumors.
Atsushi Natsume, MD, PhD (above), Associate Professor at Nagoya University, led the research team that created the simple, liquid biomarker urine test for central nervous system tumors that achieved 100% sensitivity and 97% specificity, regardless of the tumor’s size or malignancy. Such a non-invasive clinical laboratory test used clinically would be a boon to brain cancer diagnosis worldwide. (Photo copyright: Nagoya University.)
Well-fitted for Mass Screenings of Brain Cancer Patients
According to the National Cancer Institute (NCI), brain and other central nervous system (CNS) cancers represent 1.3% of all new cancer cases and have a five-year survival rate of only 32.6%.
In their published study, the Nagoya University scientists wrote, “There are no accurate mass screening methods for early detection of central nervous system (CNS) tumors. Recently, liquid biopsy has received a lot of attention for less-invasive cancer screening. Unlike other cancers, CNS tumors require efforts to find biomarkers due to the blood–brain barrier, which restricts molecular exchange between the parenchyma and blood.
“Additionally, because a satisfactory way to collect urinary biomarkers is lacking, urine-based liquid biopsy has not been fully investigated despite the fact that it has some advantages compared to blood or cerebrospinal fluid-based biopsy.
“Here, we have developed a mass-producible and sterilizable nanowire-based device that can extract urinary microRNAs efficiently. … Our findings demonstrate that urinary microRNAs extracted with the nanowire device offer a well-fitted strategy for mass screening of CNS tumors.”
The Nagoya University researchers focused on microRNA in urine as a biomarker for brain tumors because “urine can be collected easily without putting a burden on the human body,” said Atsushi Natsume, MD, PhD, Associate Professor in the Department of Neurosurgery at Nagoya University and a corresponding author of the study, in a news release.
A total of 119 urine and tumor samples were collected from patients admitted to 14 hospitals in Japan with CNS cancers between March 2017 and July 2020. The researchers used 100 urine samples from people without cancer to serve as a control for their test.
To extract the microRNA from the urine and acquire gene expression profiles, the research team designed an assembly-type microfluidic nanowire device using nanowire scaffolds containing 100 million zinc oxide nanowires. According to the scientists, the device can be sterilized and mass-produced, making it suitable for medical use. The instrument can extract a significantly greater variety and quantity of microRNAs from only a milliliter of urine compared to traditional methods, such as ultracentrifugation, the news release explained.
Simple Liquid-biopsy Test Could Save Thousands of Lives Each Year
While further studies and clinical trials will be necessary to affirm the noninvasive test’s accuracy, the Nagoya University researchers believe that, with the inclusion of additional technologies, a urine-based microRNA test could become a reliable biomarker for detecting brain tumors.
“In the future, by a combination of artificial intelligence and telemedicine, people will be able to know the presence of cancer, whereas doctors will be able to know the status of cancer patients just with a small amount of their daily urine,” Natsume said in the news release.
Biomarkers found in urine or blood samples that provide clinical laboratories with a simple, non-invasive procedure for early diagnosis of brain tumors could greatly increase the five-year survival rate for thousands of patients diagnosed with brain cancer each year. Such diagnostic technologies are also appropriate for hospitals and physicians interested in advancing patient-centered care.
