Thursday, April 28, 2016

Drawing Blood

 I have long laughed at the now collapse of Theranos.  I would not have been remotely interested in this business had I not had an Attorney who understood blood work and the science behind testing of it to the point he could diagnose a disease if given the opportunity.  What is interesting is that when a Hitchcock blonde is spewing the bullshit it goes down much easier.  Perhaps if Big Pharma had CEO's that look like their attractive sales crew, the bullshit they spill would go down much easier.

This weekend I read an immensely defensive op-ed with regards to the company and its failings and of course the finger pointing was the media and Walgreens and not the eponymous Silicon Valley geniuses that had not invested in said company and had anyone bothered to ask they could have told you so! So take that haters. 

When I read the below article about the FDA finding their way to San Jose,  I went to the comments section to find I feel the below explain why the surge in the tech sector to create the next big thing, largely due to the ACA, the whole save the world thing is secondary, just ask Elisabeth Holmes.

DrMink : It is important to note that the proliferation of technologies that are no better, and in many cases worse, than existing technologies and therapies was the primary driver of health care inflation prior to the ACA. The reality is most are a waste of money.
Kenneth Gruber: The scientific problem with the liquid biopsy approach (not even hinted at in the article) is the evidence that everyone has malignant cells in their body throughout life. However, only a small fraction of these cells ever develop into a clinical cancer. Immune system surveillance (e.g. natural killer cells) kills the overwhelming majority of malignant cells. So how does a sensitive assay differentiate between DNA from cells that will not develop into cancers from those that will. This exact problem has previously come up with other assays for specific malignancies. Microscopic tumors were detected and treated, but the incidence of the cancer was not decreased. Why? The majority of the cancers detected/treated were ones that would not have developed into a clinically significant tumor! The reporter on this story, Ms Cha, needs to do her homework!
Knotsofast: Much of the success of the Silicon Valley entrepreneurs derives from the fact that most of the technology invented there is minimally regulated by the Federal government. If you have a good idea, get some investors, make the product, take it to market, and profit. Maybe the FCC regulates the electromagnetic radiation coming out of the electronic device (phone, tablet, computer), but there are well-worn pathways that everyone knows to follow to put this kind of device in the hands of consumers. When it comes to healthcare, it is a 180 degree turn to negotiate. Healthcare products and related devices are the most heavily regulated components of our economy, largely through the FDA. You can write any kind of code for a consumer app and sell it straight away. Not so software related to running healthcare devices. Most companies don't understand the difference between sound science that proves a product "works" and regulatory science that shows how robust the process is, what are the limitations, how is the process validated, and how do you know what you know and don't know about the product? With all the documentation to convince the regulators that you have ongoing quality control. That is not something that the typical (or mythical) Mountain Dew stoked 20-something programmer pulling an all nighter in a tech start up can typically do. And the FDA does not care about your hype or the grey emminences vouching for your product sitting across the table from them when it is time to discuss approval of the product. Theranos made the mistake of trying to sell its one-drop-of-blood pan-diagnostic test technology on the promise of things to come. They also thought that having an advisory board with a flotilla of admirals and multi-star generals and luminaries like Henry Kissinger was going to impress the FDA. The GS-13/10 chemist sitting in a cubicle or a GS-14/20 medical officer reviewing your clinical trial plan don't care about your advisory board. At all.


There’s a new sheriff in town in Silicon Valley — the FDA

SAN FRANCISCO — Helmy Eltoukhy’s company is on a roll. The start-up is a leading contender in the crowded field of firms working on “liquid biopsy” tests that aim to be able to tell in a single blood draw whether a person has cancer.  

Venture investors are backing Guardant Health to the tune of nearly $200 million. Leading medical centers are testing its technology. And, earlier this month, it presented promising data on how well its screening tool, which works by scanning for tiny DNA fragments shed by dying tumor cells, worked on an initial group of 10,000 patients with late-stage cancers.

Just one thing is holding the company back: Guardant Health has yet to get approval from government regulators.

As a tidal wave of new health-related gadgets, apps and tests hits the market, the Food and Drug Administration, the Federal Trade Commission and other enforcement agencies are showing up in Silicon Valley like they’ve never done before. They have slapped companies such as Theranos, 23andMe, Lumosity and Pathway Genomics with warning letters and fines and opened investigations into products that regulators believe promise more than they can deliver.

More regulatory scrutiny is likely coming. Venture capital investments in life sciences hit a record high in 2015, with $10.1 billion invested in 783 deals, and total start-up funding is approaching levels of the last dot-com bubble — a development that has some industry observers worried that pseudoscience is being confused with innovation.

But even as some companies push back against federal agencies' reach — contesting which rules, if any, apply to their work — there’s now recognition that the government can be a powerful ally rather than a brake on progress. And its stamp of approval can take firms from being worth multimillions to multibillions.
Jeff Huber, a former senior Google executive who is now chief executive of Grail, which is also working on liquid biopsy tests, said his company reached out to FDA officials while still in the research-and-development phase and is “carefully considering their input as to the right approach.”

“A core part of our reputation and brand is the scientific rigor we’re putting behind this,” Huber said. That includes designing rigorous, large-scale clinical trials targeted to begin in 2017. (Grail’s early backers include Bill Gates and Jeffrey P. Bezos, who owns The Washington Post.)

Putting a product on the market without consulting with the FDA is risky, but companies doing so have a legal argument for their move. Guardant Health contends that the liquid biopsy test it began selling to oncologists in 2014 falls outside the agency's purview because the end result is data about the composition of a person’s blood, not a definitive diagnosis. Even so, its founder said he proactively contacted a local FDA office a few months ago to express his eagerness to work with the agency in the future.

“It’s the patient at the end of the day who is the person we’re trying to help,” said Eltoukhy, who has a PhD in electrical engineering from Stanford University. “We’re not doing them any justice or any benefits by putting a technology that’s not ready for prime time into the market.”

Given the super-hot field, the pressure to be first remains intense, however. Nearly 40 companies are working there, according to a research report by Piper Jaffray analysts William Quirk and Alexander Nowak, who valued the U.S. market alone at $32.6 billion a year. Liquid biopsies, they noted, could “revolutionize” cancer, transplant and prenatal care.

Being tested for cancer today often means having a slice of tissue cut out — which can be painful and dangerous — and waiting days or even weeks for the results to come back. The promise of liquid biopsies is that the same information might be available based on an extremely low-risk blood draw that takes mere minutes.


The concept is so simple and potentially inexpensive that it could upend practically everything about the disease. Healthy people would be able to walk into their doctor’s office for an annual checkup and know whether they had cancer well before it becomes life-threatening. Doctors would be able to track their patients’ responses to therapies in almost real time by studying which cancerous mutations are in the mix and in what concentration.

Yet the science behind liquid biopsies is incredibly tricky because of how cancerous DNA is obscured by healthy DNA in the blood, with a sophisticated combination of molecular biology, informatics, genetic sequencing and other disciplines required to reveal it. Eltoukhy likens the challenge to trying to find the fine details in the “snow” on a TV screen that’s relying on an old rabbit-ear antenna.

Guardant Health has had early success with its screening tool in late-stage cancer patients, and about 2,000 oncologists are using it to help create personalized therapies when first-line treatments have failed. The company says its test is the most comprehensive on the market, examining over 150,000 places in the genome compared with the half-dozen or so that many competitors review. It has partnered with the National Cancer Institute as well as some major pharmaceutical companies for further investigations.

In the abstract presented at the American Association for Cancer Research this month — though not peer reviewed, it is being submitted to a journal, according to Eltoukhy — the company said the test was as “highly accurate” as a surgical biopsy in detecting the cancer DNA. Lung, gastrointestinal and breast cancers were most commonly found.

Still, the real game-changer would be a test that can pinpoint cancer in its earliest stages, when the amount of DNA in the blood is mind-bogglingly small.

Pathway Genomics claimed to have done just that when it launched a direct-to-consumer $699 screening tool last year for the early detection of up to 10 different cancer types among people at high risk but without symptoms. The FDA disagreed. In a letter in  September, the agency warned that it had not found any evidence to support the claims and that the product could “harm the public health.”

The company declined to talk about its discussions with regulators, but the FDA said Pathway Genomics has since made the test available only by prescription and “also limited the claims of what their test does to ones that seem to be more in line with the current available evidence.”

Separately, the company recently paid the Justice Department $4 million to settle allegations that it offered kickbacks to physicians to refer patients to its service. It admitted no wrongdoing.

The FDA’s mandate was written decades before anyone could imagine these new technologies, so the extent of its powers continues to be much debated.  The agency said in a statement Thursday that it considers all diagnostic in vitro tests – which include blood tests – to be medical devices but that it has not always “exercised enforcement discretion over laboratory-developed tests except for those being marketed direct-to-consumers.”

“All devices, including diagnostic tests, are subject to FDA regulation,” the statement noted.

Guardant Health is far from the only firm to claim that its blood tests — or spit tests in the case of 23andMe — fall outside the regulatory bounds because they’re simply informational and do not definitively detect diseases, conditions or infections that lead to treatment decisions. But growing evidence suggests the tide may be shifting on this view.

Massimo Cristofanilli, an oncologist at the Robert H. Lurie Comprehensive Cancer Center of Northwestern University, has used Guardant Health’s test on more than 200 breast cancer patients with late-stage disease and said it has been helpful in about 6o to 70 percent of cases to determine a next course of treatment. He sees FDA approval as critical for widespread adoption.

“Physicians, especially community physicians, won’t feel comfortable until they have more of a guarantee that the tests are doing what they are supposed to be doing,” he said.

Otis Brawley, chief medical officer for the American Cancer Society, thinks FDA approval isn’t the panacea some believe it to be. Even if a liquid biopsy is rigorously validated, he said, it may only be able to identify the presence of a cancer, not where it is or whether it will have an impact on a person’s health. It’s possible that some people could have cancer, per a DNA test, that will never grow into something that will hurt them.

“The purpose of the screening test is more than to find disease. The purpose is to find disease in a situation such that medical treatment can prevent death,” Brawley said. “There’s a bunch of folks in the corporate community who don’t understand that fine detail.”

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