Proof-of-concept study may eventually lead to new clinical laboratory urine tests for fast, non-invasive detection of cancer
Here is the latest example of researchers finding useful biomarkers in urine for diagnosing certain cancers. The discovery comes from the University of Michigan Health Rogel Cancer Center, where, in a proof-of-concept study, scientists developed a urine-based test that screens for circulating free DNA (cfDNA) fragments (aka, cell-free DNA) released by tumors in the head and neck. If they confirm these findings, it’s possible the technology could be adapted into a non-invasive clinical laboratory test for selected cancers.
One such cancer is human papillomavirus (HPV) which, though “widely recognized for causing cervical cancer” is “increasingly found to cause cancers in the mouth, throat, and other head and neck regions,” according to a U-M Medical School press release.
The U-M study findings could lead to an early, non-invasive test for the detection of cancer, as compared to traditional urine or blood-based liquid biopsy testing.
“In this study, we provide evidence to support the hypothesis that conventional assays do not detect ultrashort fragments found in urine since they are designed to support longer DNA fragments. Our team used an unconventional approach to develop a urine test for HPV-positive head and neck cancer ctDNA detection,” said Chandan Bhambhani, PhD (above), Research Lab Specialist Intermediate at University of Michigan and co-first author of the study, in a news release. Clinical laboratories may soon have a new urine-based test for detecting cancer. (Photo copyright: LinkedIn.)
According to the researchers, benefits of urine testing include:
Testing with urine is convenient for people who may be unable to access healthcare and phlebotomy services.
Urine has low biohazard risk and may be easily collected in large amounts, compared with blood.
Ongoing collection of urine could make way for TR-ctDNA “kinetics to be used as a high time-resolution biomarker” to monitor patients’ response to treatment.
However, urine, the researchers cautioned, must be analyzed in a different manner if it is to be comparable in efficiency to blood-based ctDNA testing.
“There have been mixed reports on the efficiency of TR-ctDNA detection compared with that of blood ctDNA. A potentially crucial factor for the analysis of TR-ctDNA is knowing the length of TR-ctDNA fragments present in urine, because this affects assay design for optimal sensitivity in TR-ctDNA detection,” the researchers explained.
New Assay Detects Ultrashort DNA Fragments
To complete their study, the U-M researchers developed an ultrashort HPV droplet digital PCR (polymerase chain reaction) assay that enabled detection of TR-ctDNA from HPV-associated oropharyngeal squamous cell carcinoma (HPV OPSCC), BioTechniques reported.
The assay was made to target the HPV16 E6 (Human papillomavirus 16) gene and to measure TR-ctDNA in patients with HPV OPSCC, the JCI Insight paper noted.
“The HPV16 E6 gene represents a highly recurrent ctDNA target in the population of patients with HPV OPSCC,” the researchers wrote in JCI Insight, adding:
Targeting ultrashort fragments was essential “for robust TR-ctDNA detection.”
Results in urine with patients with HPV OPSCC was consistent with results from plasma ctDNA.
The test, still in the discovery phase, was mailed to patients who were being treated for the disease and who reside within 100 miles of Ann Arbor, Mich. They returned urine samples for testing at the U-M lab and to get insights into possible post-treatment needs.
“Using longitudinal urine samples from a small case series, we showed proof of concept for early detection of cancer recurrence. Thus, our results indicate that by targeting ultrashort DNA fragments, TR-ctDNA becomes a viable approach for HPV OPSCC detection and potentially for cancer recurrence monitoring after treatment,” the authors wrote.
Further Studies, Possible Test Expansion
HPV infection—and especially HPV type 16—is a growing risk factor for oropharyngeal cancers, according to the National Cancer Institute.
The U-M Rogel Cancer Center scientists plan more studies to leverage the information urine may carry about an individual’s health. The researchers intend to expand the scope of their new test to other cancers including breast cancer and acute myeloid leukemia.
“The test that has been developed has detected cancer far earlier than would typically happen based on clinical imaging. As such, these promising results have given us the confidence to broaden the scope of this study, seeking to expanding distribution even further,” said J. Chad Brenner, PhD, Associate Professor of Otolaryngology-Head and Neck Surgery, U-M Medicine, and co-senior author of the study, in the news release.
The University of Michigan Health study exemplifies scientists’ commitment to new categories of biomarkers that can be used for medical laboratory tests and prescription drugs. And by focusing on urine, the researchers made it possible for patients to collect specimens themselves and send them to the medical laboratory for analysis and reporting.
Even US military clinical laboratories strive to cut costs, protect quality, and improve outcomes
Defense Health Agency (DHA), a part of the federal Department of Defense (DOD), recently launched a plan to consolidate healthcare facilities within certain geographical regions and to unify and integrate the military’s clinical laboratory operations in those areas. The goal is to streamline efficiencies and lower costs while maintaining quality lab testing services.
The DOD operates a nationwide network of medical treatment facilities (MTFs) that include state-of-the-art clinical and anatomic pathology laboratories serving military personnel and their families. These military labs face the same issues of cost, efficiency, and outcomes as do civilian clinical laboratories throughout the United States.
To address those challenges and bring together clinical laboratory services in specific regions, the DHA established the Tidewater Market in April of 2021 to serve select US Air Force, Army, and Navy MTFs in the Washington DC metro area, central North Carolina, Jacksonville, and coastal Mississippi.
Tidewater is the fifth Military Health System (MHS) market created to manage MTFs as they transition into the DHA.
Health.mil—a website maintained by the MHS as an informational resource for those it serves—describes the MHS as “one of America’s largest and most complex healthcare institutions, and the world’s preeminent military healthcare delivery operation.
“Our MHS saves lives on the battlefield, combats infectious disease around the world, and is responsible for providing health services through both direct care [at military hospitals and clinics known as ‘military treatment facilities’] and private sector care to approximately 9.6 million beneficiaries, composed of uniformed service members, military retirees, and family members,” Health.mil notes.
With 9.6 million beneficiaries, MHS is one of the largest healthcare service organizations operating in the United States.
“The establishment of this market provides a true opportunity to optimize healthcare for our beneficiaries by focusing on outcomes and access across the Tidewater market,” said Navy Rear Admiral Darin Via, MD, Tidewater market manager, in an MHS/DHA news release. “It also allows us to work towards standardization of processes, creating an easier environment for our patients to navigate within.” (Photo copyright: US Navy.)
Finding Efficiencies, Optimizing Clinical Laboratory Processes and Services
In an article outlining the Tidewater Market clinical laboratory initiative, Health.mil noted that “A market is a group of MTFs in one geographic area working together with its TRICARE partners, Veterans Affairs hospitals, other federal healthcare organizations, private sector teaching hospitals and medical universities, as well as other healthcare partners. Markets operate as a system to support the sharing of patients, staff, budget, and other functions across facilities to improve readiness and the delivery and coordination of health services.”
The Tidewater Market provides integrated, affordable, high-quality healthcare services to active-duty service members, military retirees, reservists and national guardsmen, and their families. The market currently serves more than 390,000 beneficiaries.
In 2022, the Tidewater Market Laboratory/Pathology Integration Working Group was created to optimize services while reducing costs within the market. The group was created by US Navy Captain Stacie Milavec, who has more than 23 years of experience in military medicine.
“One of DHA’s goals with setting up a market structure is to find efficiencies and optimize and standardize processes and services wherever possible,” Milavec said in an MHS/DHA news release. “We’ve been able to do exactly that by collaborating within our working group.”
Resource Sharing between Military Clinical Laboratories
The MTFs that are geographically close to each other helped expedite turnaround times for testing results. By working together, they saved the Tidewater Market an estimated $80,000 during fiscal year 2022.
One of the methods they used to streamline testing and lower costs was to allow resource sharing between facilities within the market. For example, the full-service clinical laboratory located at the Naval Medical Center Portsmouth (NMCP) began performing head and neck pathology cases, breast biopsies, and PAP testing for some of the other facilities within the Tidewater Market. These services were previously performed by other means and in some cases were sent to commercially-contracted clinical laboratories for analysis at a high cost.
The NMCP also took on Human Papilloma Virus (HPV) testing for all MTFs within the market.
In February of 2023, NMCP began taking on additional clinical chemistry tests from the 633rd Medical Group at Joint Base Langley-Eustis located in Hampton, Virginia. Prior to that collaboration, those tests were sent out to contracted labs off-base for analysis.
“[Through collaboration between the MTFs] we’ve been able to successfully transition civilian marketplace send-out testing back into the military market by utilizing market resources,” said pathologist US Air Force Captain Dianna Chormanski, MD, Laboratory Medical Director with the 633rd Medical Group at Joint Base Langley-Eustis, in the press release. “I’m a big fan of cooperation and working together, and that’s what a market should be.”
The DHA established the market-based structure as part of the National Defense Authorization Act for Fiscal Year 2017. It’s an example of regional laboratory consolidation within one region of the US where a common effort brought together clinical laboratories operating on military bases of different services. The military’s goal was a unified, integrated medical laboratory operation that could deliver targeted cost savings while maintaining quality lab testing services. It appears to be successful.
CDC estimates that 92% of cancers caused by HPV could be eliminated in the US if HPV vaccination recommendations in this country are followed
Medical
laboratories in the United States once processed as many as 55-million Pap tests each year. However,
the need for cervical cancer screening tests is diminishing. That’s primarily because
the human
papilloma virus (HPV) vaccination effectively eliminates new cases of
cervical cancer. At least, that’s what’s happening in Australia.
When it was introduced in 2007, Australia’s nationwide
publicly-funded HPV
vaccination program only included girls, but was extended to boys in 2013.
Today, it is being credited with helping slash the country’s cervical cancer
rates.
Research published in The
Lancet Public Health (Lancet) predicts cervical cancer could be
eliminated in Australia by 2028 if current vaccination rates and screening
programs continue. Cervical cancer would be classified as effectively
eliminated once there are four or fewer new cases per 100,000 women each year.
These developments will be of interests to pathologists and cytotechnologists in
the United States.
“From the beginning, I think the [Australian] government
successfully positioned the advent of HPV vaccination as a wonderful package
that had a beneficial effect for the population,” Karen
Canfell, PhD, Director, Cancer Research Division at Cancer Council New
South Wales, Australia, and Adjunct Professor, University
of Sydney, told the Texas
Tribune. “It was celebrated for that reason, and it was a great public
health success.”
In addition to high vaccination rates, the Lancet
study notes that last year Australia transitioned from cytology-based cervical screening
every two years for women aged 18 to 69 years, to primary HPV testing every
five years for women aged 25 to 69 and exit testing for women aged 70 to 74
years.
“Large-scale clinical trials and detailed modelling suggest
that primary HPV screening is more effective at detecting cervical
abnormalities and preventing cervical cancer than screening with cytology at
shorter intervals,” the Lancet study states.
The incidence of cervical cancer in Australia now stands at
seven cases per 100,000. That’s about half the global average. The country is
on pace to see cervical cancer officially considered a “rare” cancer by 2020,
when rates are projected to drop to fewer than six new cases per 100,000 women.
US Cervical Cancer Rates
In Texas, meanwhile, the state’s failure to embrace HPV
vaccination is being blamed for slowing potential improvements in cervical
cancer rates. In 2007, Texas lawmakers rejected legislation that would have
mandated girls entering sixth grade be vaccinated for HPV. The Texas Tribune
reports that, in the decade that followed, vaccination rates remained stagnant
with only about 40% of Texans between 13 and 17 years old having been vaccinated
for HPV by 2017.
Though Texas has a similar size population as Australia, the
state’s low vaccination rates have meant cervical cancer rates have shown
little improvement. Statistics compiled by the federal Centers for Disease Control
and Prevention (CDC) show that Texas’ age-adjusted rate of new cervical
cancer cases sits at 9.2 per 100,000 women—unchanged since 2006.
Texas has the fifth highest rate of cervical cancer in the
nation, according to the CDC.
Texas State Rep. Jessica Farrar, a Democrat from Houston, maintains Texas should have followed the example of Australia, which in 2007 began a publicly funded HPV vaccination program that has the country on the verge of eliminating cervical cancer by 2028. Texas rejected mandatory HPV vaccinations and now has one of the highest cervical cancer rates in the US. “This is a preventable disease, and we should and can be doing more,” she told the Texas Tribune. “Here we are 12 years later, and look where we could’ve been, but because of certain beliefs, we’re suffering from cancers that could have been avoided.” (Photo copyright: The Texas Tribune.)
Lois Ramondetta,
MD, Professor of Gynecologic Oncology at MD Anderson Cancer Center in Houston,
told the Texas Tribune the state ignored an opportunity that Australia
seized. “[Australia] embraced the vaccine at that time, and our fear kind of
began around then,” Ramondetta said. “Really, vaccination in general has just
gone down the tube since then.”
CDC Study Pushes HPV Vaccination Recommendations in US
Texas is not the only state failing to capitalize on the HPV
vaccine’s cancer-curing promise. The CDC recently stated in a news
release announcing a recent study that 92% of cancers caused by HPV could
be eliminated if HPV vaccine recommendations were followed. CDC published the
study in its Morbidity
and Mortality Weekly Report.
HPV is a common virus that is linked to not only cervical
cancer but also cancers of the penis, head, and neck, as well as conditions
like genital warts. Though the CDC recommends children get the two-dose vaccine
at ages 11-12, the study findings indicate that only 51% of teens ages 11 to 17
have received the recommended doses of HPV vaccine, a 2% increase from 2017 to
2018.
“A future without HPV cancers is within reach, but urgent
action is needed to improve vaccine coverage rates,” Brett
Giroir, MD, Assistant Secretary for Health, US Department of Health and
Human Services (HHS), stated in the CDC news release. “Increasing HPV
vaccination overage to 80% has been and will continue to be a priority
initiative for HHS, and we will continue to work with our governmental and
private sector partners to make this a reality.”
Can Australia Eliminate Cervical Cancer?
University of Queensland Professor Ian Frazer, MD, who
co-authored the Lancet Public Health study, believes Australia is on the
verge not only of eliminating cervical cancer, but also eradicating the HPV
virus itself.
“Because this human papillomavirus only infects humans, and
the vaccine program prevents the spread of the virus, eventually we’ll get rid
of it, like we did with smallpox,” Frazer told The
Age.
“It’s not going to happen in my lifetime,” he added. “But it
could happen in the lifetime of my kids if they go about it the right way.”
If Australia’s combination of high HPV vaccination rates and
new HPV screening program succeeds in effectively eliminating cervical cancer,
clinical laboratories in this country should expect stepped-up efforts to
increase HPV vaccination rates in the United States. A renewed focus on reducing—and
ultimately eliminating—cervical cancer, could lead to fewer or less-frequently
performed Pap tests as part of cervical cancer screening protocols.
If direct-to-consumer testing continues to attract healthcare consumers and financial investors, medical laboratories could have a new source of revenue
Many have tried but few have found the right formula to
offer medical laboratory tests directly to consumers. Direct-to-consumer lab
testing as a robust business model has been an elusive goal. But now one
entrepreneur wants to crack this market and just attracted $50 million in
venture capital to fund her idea!
Outsiders often establish industries. This was the case when Jeff Bezos created Amazon in 1994. The online retailer transformed the way books were sold and, subsequently, established a massive new retail market.
Along the same lines, Julia Taylor Cheek, Founder and CEO of EverlyWell, a well-financed digital health company based in Austin—hopes to build a similarly disruptive business in the clinical laboratory industry.
Cheek is increasing her company’s outreach to consumers by
putting some of the company’s direct-to-consumer (DTC) medical tests on store
shelves at CVS and Target.
A former consultant and Harvard Business School graduate, Cheek raised $50 million in financing to expand EverlyWell’s digital platform. According to a news release, “Just two full years into operation, EverlyWell is reporting 300% year-over-year customer growth and a world-class consumer Net Promoter Score (NPS).”
“I think it’s a representation of sexism in our space. There are 15 other companies that have popped up in blood testing and you don’t hear anyone comparing Theranos to those male-founded startups,” she told Inc.
However, Dark Daily believes Cheek may be missing one
basis for the comparison with Elizabeth Holmes. Holmes intended for Theranos to
serve consumers with lab testing, and let consumers order and purchase their
own medical laboratory tests. Cheek is talking about the same primary business
strategy of letting consumers purchase their own lab tests.
Armed with this additional financing from investors, EverlyWell intends to expand services and develop new partnerships with retail pharmacy chain CVS Health (NYSE:CVS) and for-profit insurance company Humana (NYSE:HUM).
The news release notes, “The company has also expanded its
product line to offer 35 panels, including first-to-market tests in fertility,
vitamins, peri- and post-menopause, and high-risk HPV. In addition, EverlyWell
has launched an end-to-end care model for consumers, now offering an
independent physician consult and prescription, if appropriate, for select STDs
and Lyme Disease testing. All of this is included in an upfront price before
purchase.”
EverlyWell Intent on
Bringing Medical Laboratory Tests to Retail
Earlier this year, EverlyWell made nine lab tests available in more than 1,600 Target store locations, MedCity News reported. This may suggest that retailers are intrigued with direct-to-consumer lab testing.
“We didn’t create new tests or technologies. Instead, we’ve built technology that empowers people to get tests more easily. Our medical director works with the labs to create panels that are already validated and clinically relevant and understandable for consumers,” Julia Taylor Cheek (above), Founder and CEO of EverlyWell told Forbes. (Photo copyright: Arnold Wells/Austin Business Journal.)
Cheek reportedly established EverlyWell after becoming
disenchanted with medical laboratory tests that she felt were not well
explained and too costly under high-deductible health plans.
Just two years on, EverlyWell reports “hundreds of thousands of customers and tens of millions in sales.” The company plans to add additional staff on top of its existing 70 employees in anticipation of the new funding, Austin Business Journal reports.
“We are building a consumer brand, which means we have to be where people shop. We need to be in places like CVS and Target to really allow for broader distribution and name recognition,” Cheek told the Austin American-Statesman.
What Draws People to EverlyWell?
EverlyWell offers home health test kits, priced from $49 to
$400 that people can order without a doctor’s prescription and pay for online. Users
take their samples (saliva, urine, or a pinprick of blood) with provided
lancets and cotton swabs, MedCity News
reported.
EverlyWell’s top selling tests are:
Food sensitivity-$159;
Thyroid function-$159;
Metabolism-$89; and
Vitamin D deficiency-$99.
EverlyWell says it is “first” in direct-to-consumer tests
for:
EverlyWell Test kits come with registration information, instructions, collection tools;
Biological samples are sent by consumers to CLIA (Clinical Laboratory Improvement Amendments)-certified labs that partner with EverlyWell;
Results are generally completed within 10 days depending on type of test and business volume;
A physician reviews the test results;
Reports on test results are electronically accessible through smartphone apps and online web dashboards.
“Lab testing is arguably one of the most important steps in preventing and managing illness but has been largely ignored by digital health companies. EverlyWell is successfully navigating an entrenched industry to offer consumers an opportunity to take charge of their own health,” said Eric Kim, Managing Partner at Goodwater Capital (which led the financing), in the news release.
“We’re building the definitive technology-enabled healthcare platform that consumers deserve and have already come to expect in other areas of their lives,” Cheek told VentureBeat. “As high-deductible plans become the norm, consumers are becoming discerning buyers who look for seamless, digitally enabled experiences.”
Learning from
EverlyWell
Of course, pathologists and medical laboratory professionals
will watch to see if EverlyWell can sustain its rapid rise in popularity with
healthcare consumers. In particular, those consumers who prefer DTC testing
over traditional clinical laboratory visits and who may be on high-deductible
health plans.
The DTC test market represents an opportunity that most
clinical laboratories have yet to take seriously. There are many reasons why
medical lab managers and pathologists would be taking a “wait and see”
attitude. Meanwhile, EverlyWell has $50 million of investors’ money to use to
demonstrate the financial viability of its strategy to encourage consumers to purchase
their own clinical laboratory tests—and even collect their own specimens at
home!
Three innovative technologies utilizing CRISPR-Cas13, Cas12a, and Cas9 demonstrate how CRISPR might be used for more than gene editing, while highlighting potential to develop new diagnostics for both the medical laboratory and point-of-care (POC) testing markets
CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats) is in the news again! The remarkable genetic-editing technology is at the core of several important developments in clinical laboratory and anatomic pathology diagnostics, which Dark Daily has covered in detail for years.
Now, scientists at three universities are investigating ways to expand CRISPR’s use. They are using CRISPR to develop new diagnostic tests, or to enhance the sensitivity of existing DNA tests.
One such advancement improves the sensitivity of SHERLOCK (Specific High Sensitivity Reporter unLOCKing), a CRISPR-based diagnostic tool developed by a team at MIT. The new development harnesses the DNA slicing traits of CRISPR to adapt it as a multifunctional tool capable of acting as a biosensor. This has resulted in a paper-strip test, much like a pregnancy test, that can that can “display test results for a single genetic signature,” according to MIT News.
Such a medical laboratory test would be highly useful during pandemics and in rural environments that lack critical resources, such as electricity and clean water.
One Hundred Times More Sensitive Medical Laboratory Tests!
MIT News highlighted the high specificity and ease-of-use of their system in detecting Zika and Dengue viruses simultaneously. However, researchers stated that the system can target any genetic sequence. “With the original SHERLOCK, we were detecting a single molecule in a microliter, but now we can achieve 100-fold greater sensitivity … That’s especially important for applications like detecting cell-free tumor DNA in blood samples, where the concentration of your target might be extremely low,” noted Abudayyeh.
“The [CRISPR] technology demonstrates potential for many healthcare applications, including diagnosing infections in patients and detecting mutations that confer drug resistance or cause cancer,” stated senior authorFeng Zhang, PhD. Zhang, shown above in the MIT lab named after him, is a Core Institute Member of the Broad Institute, Associate Professor in the departments of Brain and Cognitive Sciences and Biological Engineering at MIT, and a pioneer in the development of CRISPR gene-editing tools. (Photo copyright: MIT.)
Creating a Cellular “Black Box” using CRISPR
Another unique use of CRISPR technology involved researchers David Liu, PhD, and Weixin Tang, PhD, of Harvard University and Howard Hughes Medical Institute (HHMI). Working in the Feng Zhang laboratory at the Broad Institute, they developed a sort of “data recorder” that records events as CRISPR-Cas9 is used to remove portions of a cell’s DNA.
They published the results of their development of CRISPR-mediated analog multi-event recording apparatus (CAMERA) systems, in Science. The story was also covered by STAT.
“The order of stimuli can be recorded through an overlapping guide RNA design and memories can be erased and re-recorded over multiple cycles,” the researchers noted. “CAMERA systems serve as ‘cell data recorders’ that write a history of endogenous or exogenous signaling events into permanent DNA sequence modifications in living cells.”
This creates a system much like the “black box” recorders in aircraft. However, using Cas9, data is recorded at the cellular level. “There are a lot of questions in cell biology where you’d like to know a cell’s history,” Liu told STAT.
While researchers acknowledge that any medical applications are in the far future, the technology holds the potential to capture and replay activity on the cellular level—a potentially powerful tool for oncologists, pathologists, and other medical specialists.
Using CRISPR to Detect Viruses and Infectious Diseases
Another recently developed technology—DNA Endonuclease Targeted CRISPR Trans Reporter (DETECTR)—shows even greater promise for utility to anatomic pathology groups and clinical laboratories.
Also recently debuted in Science, the DETECTR system is a product of Jennifer Doudna, PhD, and a team of researchers at the University of California Berkeley and HHMI. It uses CRISPR-Cas12a’s indiscriminate single-stranded DNA cleaving as a biosensor to detect different human papillomaviruses (HPVs). Once detected, it signals to indicate the presence of HPV in human cells.
Despite the current focus on HPVs, the researchers told Gizmodo they believe the same methods could identify other viral or bacterial infections, detect cancer biomarkers, and uncover chromosomal abnormalities.
Future Impact on Clinical Laboratories of CRISPR-based Diagnostics
Each of these new methods highlights the abilities of CRISPR both as a data generation tool and a biosensor. While still in the research phases, they offer yet another possibility of improving efficiency, targeting specific diseases and pathogens, and creating new assays and diagnostics to expand medical laboratory testing menus and power the precision medicine treatments of the future.
As CRISPR-based diagnostics mature, medical laboratory directors might find that new capabilities and assays featuring these technologies offer new avenues for remaining competitive and maintaining margins.
However, as SHERLOCK demonstrates, it also highlights the push for tests that produce results with high-specificity, but which do not require specialized medical laboratory training and expensive hardware to read. Similar approaches could power the next generation of POC tests, which certainly would affect the volume, and therefore the revenue, of independent clinical laboratories and hospital/health system core laboratories.
