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Clinical Laboratories and Pathology Groups

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Real-time In Vitro Diagnostic Results at the Point of Care? Possible? One San Diego-based IVD Developer Says “Yes!”

Genalyte’s cloud-based Maverick Detection System could potentially change how and when doctors order blood draws, altering long-standing clinical laboratory workflows

Anatomic pathologists and medical laboratory leaders may be aware of efforts in the in vitro diagnostics (IVD) industry to perform clinical laboratory tests with smaller quantities of blood. The most high-profile company to try and fail is Theranos, which both Dark Daily and its sister print publication The Dark Report reported on as events unfolded.

So far, though, continued efforts to dramatically reduce the amount of blood needed for most typical medical laboratory tests have come up dry. But this has not stopped innovative companies from trying to do so.

One such company is San Diego-based Genalyte. The biomedical diagnostics developer has announced it is readying its new Maverick Detection System (Maverick), which, according to the company’s website, “completes a comprehensive battery of blood tests in the physician’s office with results in 15 minutes.”

According to a news release, “Genalyte is laying the groundwork to move the business of biomedical diagnostics online, with the idea of creating an integrated delivery service for test results that can be generated from a drop of blood.” If successful, Maverick may be poised to disrupt the phlebotomy and clinical laboratory industries in a big way.

Fifteen Minutes from Fingerprick to Clinical Lab Test Results

Maverick, according to its developers, “[will] send digital samples to the cloud for quality review before releasing to the physician and patient. Our central lab handles tests that cannot be completed onsite.

“At the core of our cloud-based, diagnostic laboratory offering is revolutionary technology that uses silicon photonic biosensors to perform multiple tests off a single drop of whole blood in 15 minutes,” notes Genalyte’s website.

In a MedCity News article, Cary Gunn, Genalyte’s founder and CEO, said, “There will always be a need for esoteric testing that needs to be referred to a laboratory. But for the vast majority of routine testing, there’s no reason why that can’t be done in the doctor’s office.”

How Maverick Completes Medical Laboratory Tests in Doctor’s Offices

According to Genalyte’s website, “The Maverick Detection System performs real-time detection of macromolecules in crude samples using biologically functionalized silicon photonic biosensors lithographically printed on disposable silicon chips.”

About the width of a pencil erasure, Maverick biosensor chips “are individually functionalized with unique probe molecules and are individually interrogated, making highly multiplexed analysis possible. As a sample flows over the chip, the probes on the sensors bind with their corresponding ligands. This binding results in a localized change in refractive index on the sensor surface; this change is directly proportional to analyte concentration.”

“The silicon chip itself is watching the chemical reactions take place. Anytime two molecules bind, we can see that happen. So, the technology is capable of almost an infinite number of tests,” Gunn explained in the MedCity News article.

According to the developer, test results are available “in 10-30 minutes depending on the type of assay performed.”

Cary Gunn PhD

Cary Gunn, PhD, Genalyte’s Founder and Chief Executive Officer, said in a news release that the San Diego-based biomedical diagnostics company wants “to put a rapid and powerful suite of diagnostic tests in every physician’s office.” (Photo copyright: Genalyte.)

Pilot Studies Show Test Feasibility in Doctor’s Offices

The company also announced completion of two pilot studies of the platform’s effectiveness in performing anti-nuclear antibody (ANA) testing. The purpose of study “one” was to “evaluate the feasibility of using this novel instrument to perform ANA 8 tests in the clinic and to compare those results to the same sample tested in Genalyte’s CLIA registered laboratory.” Study “two” focused on “Detection of anti-nuclear antibodies for the diagnosis of connective tissue diseases (CTD).”

The ANA test is often ordered by physicians for diagnosis of CTDs, including:

• Rheumatoid arthritis;

Systemic lupus erythematosus;

•  Raynaud syndrome; and,

Systemic scleroderma, according to an article in Rheumatoid Arthritis News.

“We are starting with rheumatology, but I call that our entry point,” Gunn told MedCity News. “Our goal is to decentralize the vast majority of diagnostic testing to be near the patient and near the physician.”

The two studies together involved about 750 patients, who were tested by Genaltye’s Maverick system over four months. Results of their blood tests, via fingerprick in the doctor’s office, were compared to traditional medical laboratory procedures and patient diagnoses.

How Maverick Technology Works video

According to the Genalyte video above, “The Maverick Detection System … directly detects the binding of proteins or antibodies to the sensor in real-time and results are analyzed simultaneously with the accompanying Genalyte software. Almost all of the most time consuming and expensive parts of assay development and sample testing are reduced or eliminated.” Click on the image to view the video. (Caption and video copyright: Genalyte.)

According to the news release and the published clinical abstracts, the researchers concluded that:

• Positive and negative results on whole blood tested on the Maverick system highly correlated with serum tested on previously approved devices;

• Multiplex ANA testing on whole blood in physician offices is feasible;

• Venous draw and fingerstick blood samples highly correlated; and

• Maverick has the propensity to improve patients wait times for diagnosis and to enhance their testing convenience.

“There is extremely high correlation for absolute value between venous blood and fingerstick blood, and between positive and negative results seen with whole blood on the Maverick and serum on the FIDIS Connective 10,” noted study “one” researchers.

“I’m impressed,” Patricia Jones, PhD, former President of the American Association for Clinical Chemistry (AACC), told Bloomberg News. “The game-changing part of this would be being able to do testing and potentially make a diagnosis immediately, instead of having to send out lab tests, wait several days, and then call the patient,” she added.

Can One Drop Do It All? Some Researchers Advise Caution

The controversy surrounding point-of-care fingerprick capillary blood draws performed on in-office automated blood analyzers, versus clinical laboratory venous draws performed on high-volume laboratory systems, is not new. Dark Daily has reported on several blood test studies in the past.

One such study involved bioengineers at Rice University. It concluded that fingerpricked capillary blood may not be accurate or reliable enough for clinical decision-making.

Their study acknowledged the value of such capillary blood testing in remote areas. But it also urged caution about use of measurements from a single drop of fingerprick blood.

“Using both a hematology analyzer and POC hemoglobinometer, we found the variability of blood component measures to be greater for successive drops of fingerprick blood than for multiple drops of venous blood,” the researchers wrote in The American Journal of Clinical Pathology (AJCP).

Research will no doubt continue until a viable, accurate, and affordable blood analyzer system that conducts dozens of clinical laboratory tests based on a few drops of blood comes to market. It’s basically inevitable in today’s world where computers can be built from molecules and miniature medical laboratories can be placed in chips, skin patches, and needles.

Pathologists and clinical laboratory leaders would be well advised to monitor the development of these various new diagnostic technologies. For most of the past decade, there has been a steady parade of companies and research teams announcing new discoveries that could revolutionize clinical diagnostics as performed today. However, few disruptive clinical laboratory tests or analyzers based on these technologies have made it into the clinical marketplace.

—Donna Marie Pocius

Related Information:

Can Genalyte Achieve What Theranos Touted?

Genalyte Takes Aim at Lab Testing Giants with Cloud-Based Service

Genalyte Raises $36 Million From Khosla for its One-Drop Blood Test

AACC President Calls Genalyte’s Blood Diagnostic Tests ‘Game-Changing’

Drop-to-Drop Variation in the Cellular Components of Fingerprick Blood: Implications for Point-of-Care Diagnostic Development

Genalyte Diagnostic Tool Shows Potential to Improve Turnaround Time in RA, Other Conditions

Application of a Novel Anti-Nuclear Antibody Multiplex Test Using Finger Stick and Venous Whole Blood in a Rheumatology Clinic—Demonstration of Feasibility

Rice University Researchers Publish Study About Variation in Drop-to-Drop Samples of Capillary Blood Collected by Fingerprick and Used for Clinical Laboratory Testing

After AACC Presentation, Elizabeth Holmes and Theranos Failed to Convince Clinical Laboratory Scientists and the News Media about Quality of Its Technology

Score for Theranos After AACC: Fail

CMS Seeks ‘New Direction’ for its Innovation Center as the Agency Evaluates Current Value-Based Payment Models for Medicare Services, including Medical Laboratory Testing

Federal agency receives input on eight focus areas as it looks for ways to enable providers ‘to design and offer new approaches to delivering care’

Medical laboratories and anatomic pathology groups preparing for the transition from fee-for-service healthcare will want to keep a close eye on the Centers for Medicare and Medicaid Services (CMS). The federal agency’s administrator plans to set a “new direction” for CMS as it shifts to value-based reimbursement models for Medicare services that could impact clinical laboratory revenues.

In an informal Request for Information (RFI), the Center for Medicare and Medicaid Innovation (CMMI) sought feedback on a “new direction to promote patient-centered care and test market-driven reforms that empower beneficiaries as consumers, provide price transparency, increase choices and competition to drive quality, reduce costs, and improve outcomes.”

CMS to ‘Move Away’ from Engineering Healthcare ‘From Afar’

The agency requested input on eight focus areas:

1. Increased participation in Advanced Alternative Payment Models (APMs);

2. Consumer-directed care and market-based innovation models;

3. Physician specialty models;

4. Prescription drug models;

5. Medicare Advantage innovation models;

6. State-based and local innovation;

7. Mental and behavioral health models; and,

8. Program integrity.

Comments from healthcare providers, clinicians, states, payers, and stakeholders were accepted through November 20, 2017.

In a Wall Street Journal (WSJ) op-ed, CMS Administrator Seema Verma explained the agency’s process moving forward. “We will move away from the assumption that Washington can engineer a more efficient healthcare system from afar—that we should specify the processes healthcare providers are required to follow,” she wrote.

CMS Administrator Seema Verma (above) plans to lead the Center for Medicare and Medicaid Innovation “in a new direction” and may be signaling a willingness to give providers more flexibility with value-based care payment models for Medicare services. (Photo copyright: Healthcare Dive.)

The RFI states the new model design will follow six guiding principles:

1. Choice and competition in the market;

2. Provider choice and incentives;

3. Patient-centered care;

4. Benefit design and price transparency;

5. Transparent model design and evaluation; and,

6. Small scale testing.

Providers Need Freedom to Design New Approaches to Healthcare

Verma said CMS plans to review all Innovation Center models to determine “what is working and should continue, and what isn’t and shouldn’t.” She voiced concern that the complexity of some of the current models may have encouraged consolidation in the healthcare system, resulting in fewer choices for patients.

“We must shift away from a fee-for-service system that reimburses only on volume and move toward a system that holds providers accountable for outcomes and allows them to innovate,” Verma wrote in the WSJ op-ed. “Providers need the freedom to design and offer new approaches to delivering care. Our goal is to increase flexibility by providing more waivers from current requirements.”

Actual Progress of Value-based Healthcare ‘Herky-Jerky’

In its reporting on the recent CMS announcements, Healthcare DIVE suggested that the U.S. Department of Health and Human Services (HHS) “is looking to make some potentially major changes” in value-based payment models.

However, Neil Smiley, CEO of Loopback Analytics, which assists healthcare organizations with managing outcome-based care, believes the transition to value-based care may face stiffer headwinds under the new administration. He points to an August CMS proposal that canceled some mandatory bundled payment programs and scaled back others as an indication that healthcare transformation could be slowing.

“The pace at which CMS committed to rolling out value-based care is fundamentally different from the pace we’re currently seeing,” he told Health IT. “The progress toward value-based care, instead of this steady momentum they expected, is more of a herky-jerky fashion.”

Modify, Don’t Abandon Existing Payment Models, suggests HCTTF

The Health Care Transformation Task Force (HCTTF), a 42-member industry consortium, was among the stakeholders who responded to CMS’ RFI. In a 22-page letter, the task force reiterated its support for the healthcare system’s transformation to value-based payment and care delivery, while outlining areas for improvements. The group urged CMS to continue to develop new models while modifying, rather than abandoning, existing models that show promise and need time to achieve a lasting return.

“We would like CMS to continue support for promising models while balancing the current portfolio with new, innovative payment models,” Clare Wrobel, Director of Payment Reform Models at HCTTF, told Home Health Care News. “[But] it would be a mistake to discard current models that providers have already invested in and are showing real promise.”

Smiley, meanwhile, suggests clinical laboratory managers, pathologists, and other healthcare providers keep watch as healthcare transformation continues to evolve.

“The fee-for-service model, love it or hate it, is not dying. The organism has adapted,” he told Health IT. “For those that were aggressive early adopters of value-based care and really believed what they were hearing, and have gone fully after value-based care, some of them may feel a little exposed. If they go too hard too fast, they may suffer economically if they misjudge the pace at which this moves.”

—Andrea Downing Peck

Related Information:

Centers for Medicare and Medicaid Services: Innovation Center New Direction

Medicare and Medicaid Need Innovation

CMS Seeks ‘New Direction’ for Innovation Center

Comprehensive Care for Joint Replacement Payment Model

Task Force Calls on CMS to Encourage Alternative Payment Models

CMS Request for Information: Innovation Center New Direction

Task Force Urges CMS to Preserve Value Based Payment Models

Children’s Study Determines MicroRNA in Saliva Can Accurately Diagnose Acute and Prolonged Concussion Symptoms; Could Lead to New Medical Laboratory Tests and Point-of-Care Diagnostics

Research published in JAMA Pediatrics reports that non-invasive salivary microRNA testing identifies prolonged concussion symptoms with 85% accuracy

Sports-related concussions are always tragic, but doubly so when they involve child athletes. Quick diagnoses and treatments are critical to prevent permanent brain injury. But doctors are often hampered by the pace at which traditional medical imaging modalities and clinical laboratory diagnostic technologies provide crucial feedback.

Now, researchers at Penn State Health Children’s Hospital have determined that microRNA in saliva could be used as biomarkers in point-of-care concussion testing during sports events, according to a Penn State Health news release. Such sideline saliva analyses could provide quick feedback to field doctors on whether a head injury is serious enough to put injured athletes out of play, and how long the effects of such injuries might last. But is it accurate?

Jeremiah J. Johnson, MA, BS, Department of Pediatrics, at Penn State College of Medicine in Hershey, Pa., et al, recently published a study in the Journal of the American Medical Association (JAMA) Pediatrics that evaluated the ability of salivary microRNA to identify concussion in children. The salivary test of microRNA levels, Johnson and colleagues argued, does accurately identify the “duration and character of concussion symptoms.” According to the researchers, the test demonstrated high prognostic potential as a “toolset for facilitating concussion management” and may provide an additional biomarker source for use in clinical laboratory testing.

MicroRNA Offers New Biomarkers for Concussion Diagnosis

The study tested the saliva of 52 adolescents with a clinical diagnosis of mild traumatic brain injury in the form of concussion for specific microRNA expressions. Researchers identified five microRNA molecules which “accurately identify” patients with concussion symptoms. Three of those molecules served to diagnose specific symptoms of headache, fatigue, and memory difficulties up to one month after injury with low false detection rates. Because these microRNA molecules are not specific to children, could the test maintain diagnostic accuracy for patients of all ages?

William P. Meehan III, MD, with the Micheli Center for Sports Injury Prevention at Boston General Hospital, and Rebekah Mannix, MD, MPH, with the Brain Injury Center at Boston Children’s Hospital wrote an editorial responding to the original research article stating that “the use of salivary microRNA in this study is both novel and clinically relevant.” Adding that “using this salivary microRNA panel to diagnose and manage concussions could be a major advancement to the field.”

Meehan and Mannix also remarked on the speed and relative ease of obtaining saliva samples, stating that “salivary microRNAs could also offer insights into the underlying biological mechanisms of injuries, potentially identifying specific targets to modify disease.”

More Accurate than Current Concussion Diagnosis Tools

There has been a marked interest in microRNA analysis and testing in recent years. MicroRNA analysis and testing has found use in cancer prognosis and personalized medicine that help predict responses to specific treatments for individual patients with a variety of chronic diseases. The news that microRNA can be used to predict concussion and duration of symptoms further solidifies the role microRNA may play in medical laboratory testing in the near future.

In an interview with CNN, Steve Hicks, MD, PhD, senior author of the JAMA Pediatrics research article and Assistant Professor of Pediatrics at Penn State College of Medicine, reported that the salivary microRNA test predicted concussion with 85% accuracy in comparison to current clinical survey measures, which are “approximately 65% accurate.” Hicks added that “the technology required to measure saliva RNA is already employed in medicine” as a common means of testing for upper respiratory viruses and that “modifying this approach for patients with concussions could potentially provide a rapid, objective tool for managing brain injury.”

Currently the Standard Concussion Assessment Tool, Third Edition (SCAT 3), which includes a series of cognitive and physical tests, is used on sports sidelines to detect concussion symptoms. Hicks notes that one problem with SCAT 3 is that “an athlete may have a concussion even if [his or her] score is ‘normal.’” Therefore, the microRNA saliva test could provide objective evidence of concussion in patients SCAT 3 fails to accurately diagnose.

Steve-Hicks-MD

Steven D. Hicks, MD, PhD (above), led the research team that studied the use of microRNA in saliva, rather than in blood, as a biomarker to identify concussions symptoms in children, and determine how long effects of the injury might last. (Photo copyright: Penn State Health.)

Too Early to Know How Helpful the Test May Be?   

In the same CNN interview, Neurologist Jeffery Kutcher, MD, head of the Sports Neurology Clinic at The Core Institute in Brighton, Mich., stated that the Penn State study’s findings were “promising” and that “work like this is important because it does provide potential for tests that can be helpful in the clinical setting.” Kutcher cautioned however, that it was “too early to know what this type of tool can do for us.”

In an NPR article, Manish Bhomia, M.Eng., PhD, a brain injury researcher with the Uniformed Services University of the Health Sciences commented that “a saliva test could greatly improve care for young people who don’t have obvious symptoms of a concussion.” Bhomia stated that “micro-RNAs offer a promising way to assess concussions in adults as well as children,” but he is wary to laud saliva tests as the best method of measuring relevant microRNA molecules. Bhomia states that blood samples “which tend to contain greater numbers of the genetic fragments” are perhaps a better option.

Hicks disagrees. In an article from Penn State News, Hicks stated that the novel aspect of this study was that it focused on microRNA levels “in saliva rather than blood.” Thus, a test based on saliva, rather than a phlebotomy stick or more invasive blood testing, requires no need for venous blood.

“The ultimate goal is to be able to objectively identify that a concussion has happened and then predict how long the symptoms will go on for,” Hicks noted in the Penn State News article. “Then, we can use that knowledge to improve the care that we provide for children who have concussions, either by starting medicine earlier or holding them out of activities for longer.”

Quadrant Biosciences, a biotech company in Syracuse, N.Y., that helped fund the study, is hoping to “bring a saliva test for concussion to market in the next 12 to 24 months,” according to Hicks in his CNN interview. If development proceeds as planned, the saliva test could prove a “game changer” for sports medicine diagnostics and possibly open new avenues for related microRNA in clinical laboratory testing.

Amanda Warren

Related Information:

Prolonged Concussion Symptoms Identifiable by Salivary MicroRNA

Association of Salivary MicroRNA Changes with Prolonged Concussion Symptoms

Promise of Salivary MicroRNA for Assessing Concussion

Spit Test May Diagnose, Predict Duration of Concussion in Kids

Molecules in Spit May Be Able to Diagnose and Predict Length of Concussions

Spit Test May Help Reveal Concussion Severity

Meet the Clinical Pathology Laboratory on the Palm of a Hand: Japanese Researchers Announce A Point-Of-Care Testing Device That Detects MicroRNA in 20 Minutes

With Launch of RNAcentral Database, Pathologists Now Have Unprecedented Access to RNA Data

University of Michigan Researchers Use “Labyrinth” Chip Design in Clinical Trial to Capture Circulating Tumor Cells of Different Cancer Types

Research goal was to isolate circulating tumor cells in venipuncture samples with improved purity compared to standard spiral chips

Many research teams are pursuing the goal of creating assays that detect circulating tumor cells (CTCs) that would allow earlier and more accurate diagnosis of cancer. Now comes news of a unique technology developed at the University of Michigan (U-M) Ann Arbor that showed promised in an early study.

The method of using CTCs to diagnose cancer in patients, while further analyzing specific characteristics of a given cancer case, shows promise as an innovative tool for clinical laboratories and oncologists. However, current approaches face challenges when it comes to proving accuracy and establishing thresholds that might indicate the need for further action.

Researchers at U-M believe they may have solved that problem. They created “Labyrinth,” a “label-free microfluidic device” that condenses 637mm of channels—including 11 loops and 56 corners—onto a 500μm-wide chip that uses inertia and Dean flow to separate white blood cells and CTCs from venipuncture samples at rates as high as 2.5ml per minute. These results improve upon the traditional spiral chip design.

Publishing their findings in Cell Systems, first author of the study Eric Lin, PhD, noted, “With the recent advances in tools for genomic characterization, it is more compelling than ever to look at the tumor heterogeneity to understand tumor progression and resistance to therapies. The Labyrinth device enabled high yields of CTCs without the bias induced by antibody-based selection, allowing the identification of true biological tumor heterogeneity.”

The graphic above, taken from the University of Michigan study, demonstrates the “High-throughput and label-free Labyrinth device that enables single CTC isolation and gene expression characterization.” According to the researchers, “Labyrinth offers a cell-surface marker-independent single-cell isolation platform to study heterogeneous CTC subpopulations.” The U-M study shows promise in creating tools for oncologist and clinical laboratory cancer treatment. (Image copyright: University of Michigan/Cell Systems.)

Challenges in the Isolation of CTCs

The Labyrinth chip is not the first device to assist in isolating CTCs. The U-M study notes that while immune-affinity capture is a validated approach to prognosis, therapeutic monitoring and molecular diagnostics, it does not work with all cancer cases. The researchers also note the method creates challenges in single-cell analysis later.

Existing label-free methods of isolation, such as deterministic lateral displacement, microfluidic flow fractionation, and acoustic-based separation, avoid these concerns but face issues of their own. The researchers noted, “Issues encountered with these approaches include pore clogging, high-pressure drop, pre-fixation to prevent CTC loss, low throughput, and excessive non-specific cell retention.”

The researchers further clarified that a major factor separating the Labyrinth chip from other methods is the ability to identify CTC subpopulations without the need for manual selection based on positive or negative protein expression. Thus, improving the ability to conduct further single-cell analysis from the results. Testing of the Labyrinth chip involved a variety of cancer cell lines, including:

·       Human breast (MCF-7);

·       Pancreatic (PANC-1);

·       Prostate (PC-3); and,

·       Lung (H1650).

And while standard spiral chips are already a common method for conducting size-based sorting, the purity of results is less than ideal with thousands of other cells remaining in the sample.

The researchers reported that the Labyrinth chip recovered 91.5% (plus or minus 0.9%) of cancer cells and removed 91.4% (plus or minus 3.3%) of white blood cells in a spiked buffer test.

“Bigger cells, like most cancer cells, focus pretty fast due to the curvature. But the smaller the cell is, the longer it takes to get focused,” Sunitha Nagrath, PhD, Associate Professor of Chemical Engineering and a lead developer of the Labyrinth chip, stated in a U-M news release. “The corners produce a mixing action that makes the smaller white blood cells come close to the equilibrium position much faster.”

Labyrinth also supports a series configuration of multiple chips. While testing two chips in series, researchers noted “a two-log improvement in tumor cell enrichment over the single Labyrinth.” They claim this is a higher purity than other label-free methods they studied, while adding only five minutes to processing times.

Sunitha Nagrath, PhD (above), is an Associate Professor of Chemical Engineering at the University of Michigan, and one of the lead developers of the Labyrinth chip. “You cannot put a box around these cells,” she noted in the U-M news release. “The markers for them are so complex, there is no one marker we could target for all these stages.” (Photo copyright: University of Michigan.)

Current Testing Using the Labyrinth Chip

The chip is already in use in a clinical trial for an aggressive form of breast cancer by Max Wicha, MD, Madeline and Sidney Forbes Professor of Oncology, Founding Director Emeritus, University of Michigan Comprehensive Cancer Center, and co-author of the Cell Systems study, who lead the study along with Nagrath.

The trial involves the attempted activation of adult system cells by blocking the signaling molecule interleukin-6. Wicha suspects the molecule enables cancer stem cells as well. “We think that this may be a way to monitor patients in clinical trials,” he said in the U-M news release. “Rather than just counting the cells, by capturing them, we can perform molecular analysis [to] know what we can target with treatments.”

The news release further highlights how this chip is specifically suited to such a task. As cancer stem cells transition from stem-like cells to more ordinary cell types, their gene expression shifts as well. This creates an issue when using conventional cell targeting. Nagrath notes this concern, stating, “The markers for [cancer stem cells] are so complex, there is no one marker we could target for all these stages.”

The Labyrinth chip shows potential for overcoming one of the biggest hurdles to leveraging CTCs to diagnose cancers and develop personalized therapies. Currently, the chip can output to Fluidigm, DEPArray by Silicon Biosystems, and RainDance Technologies’ RainDrop Digital PCR System.

The U-M researchers hope that future research will yield additional applications and compatible systems to further improve the ability for medical laboratories to use CTCs in the early detection and monitoring of cancer cases.

—Jon Stone

Related Information:

‘Labyrinth’ Chip Could Help Monitor Aggressive Cancer Stem Cells

High-throughput Microfluidic Labyrinth for the Label-free Isolation of Circulating Tumor Cells

Novel Labyrinth Chip Monitors Cancer Stem Cells in Clinical Trial

‘Labyrinth’ Device Sorts Cancer Cells from Healthy Blood

This Awesome Blood Labyrinth Is the Newest Method for Catching Cancer Cells

Labyrinth Chip Has the Potential to Lead to Customized Cancer Treatments

Metabolomics Promises to Provide New Diagnostic Biomarkers, Assays for Personalized Medicine and Medical Laboratories

Researchers are finding multiple approaches to metabolomic research and development involving disparate technology platforms and instrumentation

Human metabolome has been discovered to be a wealth of medical laboratory biomarkers for diagnosis, therapy, and patient monitoring. Because it can provide a dynamic phenotype of the human body, there are many potential clinical laboratory applications that could arise from metabolomics, the study of metabolites.

Researchers are discovering numerous ways the expanding field of metabolomics could transform the future of healthcare. However, to fully exploit the potential of human metabolome, developers must choose from various approaches to research.

“The metabolites we’re dealing with have vast differences in chemical properties, which means you need multi-platform approaches and various types of instrumentation,” James MacRae, PhD, Head of Metabolomics at the Francis Crick Institute in London, told Technology Networks. “We can either use an untargeted approach—trying to measure as much as possible, generating a metabolic profile—or else a more targeted approach where we are focusing on specific metabolites or pathways,” he added.

A multi-platform approach means different diagnostic technologies required to assess an individual’s various metabolomes, which, potentially, could result in multi-biomarker assays for medical laboratories.

Measuring All Metabolites in a Cell or Bio System

Metabolomics is the study of small molecules located within cells, biofluids, tissues, and organisms. These molecules are known as metabolites, and their functions within a biological system are cumulatively known as the metabolome.

Metabolomics, the study of metabolome, can render a real-time representation of the complete physiology of an organism by examining differences between biological samples based on their metabolite characteristics.

“Metabolomics is the attempt to measure all of the metabolites in a cell or bio system,” explained MacRae in the Technology Networks article. “You have tens of thousands of genes, of which tens of thousands will be expressed—and you also have the proteins expressed from them, which will then also be modified in different ways. And all of these things impact on a relatively small number of metabolites—in the thousands rather than the tens of thousands. Because of that, it’s a very sensitive output for the health or physiology of your sample.

“With that in mind, metabolomics has great potential for application in most, if not all, diseases—from diabetes, heart disease, cancer, HIV, autoimmune disease, parasitology, and host-pathogen interactions,” he added.

State-of-the-art metabolomic technologies

The graphic above is taken from a study published in the Journal of the American College of Cardiology (JACC). It notes, “State-of-the-art metabolomic technologies give us the ability to measure thousands of metabolites in biological fluids or biopsies, providing us with a metabolic fingerprint of individual patients. These metabolic profiles may serve as diagnostic and/or prognostic tools that have the potential to significantly alter the management of [chronic disease].” (Image and caption copyright:Journal of the American College of Cardiology.)

There are four major fields of study that are collectively referred to as the “omics.” In addition to metabolomics, the remaining three are:

•                  Genomics: the study of DNA and genetic information within a cell;

•                  Proteomics: the large-scale study of proteins; and,

•                  Transcriptomics: the study of RNA and differences in mRNA expressions.

Researchers caution that metabolomics should be used in conjunction with other methods to analyze data for the most accurate results.

“Taking everything together—metabolic profiling, targeted assays, label incorporation and computational models, and also trying to associate all of this with proteomics and

genomics and transcriptomic data—that’s really what encapsulates both the power and also the challenges of metabolomics,” MacRae explained.

Metabolome in Precision Medicine

Metabolomics may also have the ability to help researchers and physicians fine-tune therapies to meet the specific needs of individual patients.

“We know we’re all very different and we don’t respond to drugs in the same way, so we could potentially use metabolomics to help select the best treatment for each individual,” Warwick Dunn, PhD, Senior Lecturer in Metabolomics at the University of Birmingham, Director of Mass Spectrometry, Phenome Center Birmingham, and, Co-Director, Birmingham Metabolomics Training Center, UK, told Technology Networks.

“Our genome is generally static and says what might happen in the future. And the metabolome at the other end is the opposite—very dynamic, saying what just happened or could be about the happen,” Dunn explained. “So, we could apply it to identify prognostic biomarkers, for example, to predict if someone is at greater risk of developing diabetes five to ten years from now. And if you know that, you can change their lifestyle or environment to try and prevent it.”

Metabolomics continues to tap the many diagnostic possibilities posed by the human metabolome. And, the resulting human biomarkers derived from the research could result in a rich new vein of medical laboratory assays.

—JP Schlingman

Related Information:

Metabolomics and Health: On the Cusp of a Revolution

‘Metabolomics’ Distinguishes Pancreatic Cancer from Pancreatitis

Using Metabolomics to Prevent Colon Cancer

Applications of Metabolomics

The Emerging Role of Metabolomics in the Diagnosis and Prognosis of Cardiovascular Disease

Metabolomics Takes Another Step Forward as Methodology for Clinical Laboratory Testing with Development of an Assay for the Diagnosis of Concussion

 

Sudden Shutdown of Claritas Genomics After Five Years as A Leading Source of Pediatric Genetic Testing Surprises Clinical Laboratory Industry

Operations ended last week after reports suggested the end came as a result of misalignment of goals among investors in a lab company many considered to be successful

One contributing factor the surprise announcement that the owners of Claritas Genomics were closing the clinical laboratory company may have been the struggle to get payers to reimburse its genetics test claims. If true, it is the latest market sign of how health insurers are making it difficult for labs to get paid for proprietary molecular diagnostic assays and genetic tests.

With no official announcement, Claritas Genomics quietly ended operations effective on Friday, Jan. 19. That evening, a spokeswoman for Claritas Genomics’ majority owner, Boston Children’s Hospital (BCH), confirmed for Dark Daily that the lab was closed and said no reason was given for the closing. More details may be forthcoming this week, she added.

As of the close of business on Tuesday, there was still no word from the genetics testing company founded in 2013. GenomeWeb was the first to report that Claritas Genomic’s diagnostic laboratories no longer do any testing. According to GenomeWeb, Brian Quirbach, former Clinical Testing Coordinator at Claritas Genomics, and part of the lab’s client services team, confirmed that the last day of business was Friday, Jan. 19. The BCH spokeswoman said the GenomeWeb article was accurate.

Asked if there had been a precipitating event at Claritas, if the company had experienced any serious business trouble, if it had struggled to get paid, or if payers were slow in paying, the spokeswoman declined to comment. Instead, she referred to the GenomeWeb article, saying it was mostly accurate.

Claritas Genomics a Casualty of Clinical Laboratory Price Wars

According GenomeWeb, Claritas was like other genetic testing laboratories that have long struggled to get health insurers to pay for rare disease tests. Also, Claritas and other genetic and molecular testing labs suffer financially as a direct result of the ongoing price wars among competing genetic testing lab companies.

“As a small company, it also wasn’t able to offer testing that did not come with potential patient payment obligations, which larger laboratories with better resources or payer contracts can do,” the GenomeWeb article noted.

According to GenomeWeb’s sources, Claritas had a reputation for delivering highly-accurate test results. The reason for this level of performance, the article noted, was Claritas’ use of two sequencing platforms, which lowered false-positive rates. The testing lab combined low false-positive rates with interpretations from WuXi NextCode. The clinical expertise available at BCH gave Claritas the best diagnostic exome in the industry in terms of technical quality and diagnostic power, one source told GenomeWeb.

The decision to close the company, the source noted, was a result of misalignment between investors at WuXi NextCode and BCH. Other sources speculated that Claritas and WuXi NextCode were considering a merger, which did not happen, GenomeWeb reported.

Ultimately, the source stated, BCH held the controlling interest and made the business decision to close the clinical laboratory company. And that the decision was unrelated to the lab’s quality.

Claritas’ clients were told, according to GenomeWeb, to download all test results and data by Thursday, Jan. 18, and that the lab’s operations manager would be available for a few weeks to answer customers’ questions.

Genetic Tests Developer for Pediatrics and Hereditary Disorders

Claritas, which was headquartered in Cambridge, Mass., had about 30 employees. When it was founded as a partnership between BCH and Life Technologies, its goal was to develop genetic and genomics-based diagnostic tests, primarily for pediatric patients with hereditary disorders.

By the middle of 2014, the company had grown to about 60 employees, moved into a new building with a CLIA-certified laboratory in Cambridge, Mass., and launched the ClariView Exome for Pediatric Neurology, GenomeWeb reported. Four months later, Thermo Fisher Scientific acquired Life Technologies.

In 2014, Dark Daily’s sister print publication The Dark Report (TDR) reported on the development of Claritas Genomics as an in-hospital lab that became independent. For 15 years, the lab operated as the genetic diagnostic laboratory at 396-bed BCH, we reported. (See The Dark Report, “Claritas Is Example of New Lab Business Model,” June 13, 2014.)

“As one of the hospital’s CLIA-certified laboratories, it provided the advanced molecular diagnostic testing services used by the hospital,” said Patrice M. Milos, PhD, who was Claritas Genomic’s CEO at the time.

At the 2014 Executive War College in New Orleans, Patrice Milos, PhD, then President and CEO, Claritas Genomics, spoke with Adam Slone, CEO, Slone Partners, about her path to becoming CEO of Claritas Genomics, how to foster a strong company culture, and what traits she looks for in a leadership team. Click on the photo above to watch the video interview. (Video copyright: Sloan Partners.)

In the early days of Claritas Genomics, BCH was challenged to provide the capital and resources needed for the molecular lab to grow, Milos said. “This was due to the rapid pace of genetic discovery, ongoing advances in gene sequencing technologies, and the difficult financial environment in healthcare,” she recalled. “Thus, to make it easier for the lab to grow, the hospital spun out the lab and created Claritas Genomics in February 2013.”

Informatics Tools to Support Clinical Use of Genetic Data

As an independent lab, Claritas had early success winning a role to do testing for the Million Veteran Program (MVP), a $9-million project of the US Department of Veterans Affairs. In October 2013, the lab company reported that it would do exome sequencing of samples from veterans. At the time, it was one of the largest sequencing initiatives in the nation. (The VA has since reported in 2016 that the program was the largest genomic database in the world.)

Further, this MVP was significant because Claritas benefited by generating cash flow, which it could use to acquire the gene sequencing system and staff expertise in next-generation sequencing (NGS) technologies. And, it developed the informatics infrastructure needed to collect, store, and analyze large volumes of genetic data, TDR reported.

Two months later, in December 2013, Claritas entered into a partnership with Cerner Corp. of Kansas City, Mo., to build the tools and connectivity systems needed to integrate NGS-based diagnostic testing into healthcare data systems. Specifically, the companies said they would develop a system “for molecular diagnostics that is tailored to NGS workflows, which are more complex and generate much more data than traditional molecular diagnostic tests.”

At the time, Milos explained the role that Claritas would play in this partnership. “In terms of this collaboration, one barrier to the use of genomics in medicine is the challenge of integrating the complex information derived from large-scale genomic measurements into a patient’s medical record and clinical practice,” he said. “Our mutual goal is to develop the informatics tools that support clinical use of genetic data.”

Claritas also was working with other pediatric institutions, such as Cincinnati Children’s Hospital, to advance clinical knowledge in a number of ways. “For example, we are facilitating a research network by connecting patients with experts who can provide care and by licensing assays from the hospitals where the discoveries that lead to diagnostic tests are made,” Milos said. “Also, in this business model, we can receive investment from outside sources, such as we have from two of our Series A investors, Life Technologies and Cerner.”

The abrupt closure of Claritas Genomics makes this clinical laboratory company the latest to disappear from the marketplace. The mystery factor in this case is why a company viewed by many as establishing a credible reputation for itself came to such a sudden end.

Joseph Burns

Related Information:

Claritas Genomics Shuts Down Operations

Boston Childrens Hospital and Life Technologies Launch Claritas Genomics

Million Veteran Program is Now Largest Genomic Database in the World

Cerner, Claritas Join Forces to Build Gene-Based Diagnostic Testing Tools

Claritas Is Example of New Lab Business Model

2018 Executive War College for senior lab execs, administrators, and pathologists

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