The Passion of Chris Centeno

By Chris Centeno, MD /

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Chris Centeno

 This week I received an email from a longstanding patient who came across this article and couldn’t understand how it was that she had never seen it before.  She asked me to put it out there as she felt that it accurately portrayed not only what we do, but why.  It originally appeared in Orthopedics This Week in 2013.

The Passion of Chris Centeno

By Robin Young

To paraphrase Oliver Wendell Holmes, medical innovation is great when it is greatly pursued.

Harrington, Charnley, Kirk, Bunnell, Shands, Panjabi, Ilizarov, Michelson, Campbell and Kuntscher. To a man they peered into the recesses of the human body and saw a future very different from the one taught in med­ical school. Why, they wondered, did patients have to suffer because of the parochial science of the time?

Greatly pursuing a vision of better tools, procedures and patient out­comes often comes at a price. John Charnley famously had more than 300 failed hip replacements before perfecting his materials and proce­dure. Harrington’s idea to implant a rod and attach it to the spine at the top and bottom of a scoliotic curve with hooks was considered an abomi­nation when first presented at AAOS in 1958. At his hospital, residents were discouraged from scrubbing in with him.

Chris Centeno, M.D., who is greatly pursuing a vision of autologous bio­logic therapies, has an ever growing registry of stem cell treated orthope­dic patients (now more than 4,300 patients) as well as the dubious honor of having been forced to sue the FDA twice before being sued over one of his five autologous stem cell therapies. Dr. Centeno trained at the Baylor Col­lege of Medicine, Texas Medical Center and the Institute for Rehabilitation Re­search.

Resisting Autologous Biologic Ther­apies?

“Resistance comes when you forge new ideas that are ahead of their time. The nice part is that eventually, when the rest of the world catches up, the resis­tance turns into acceptance.” – Chris Centeno.

Why would autologous therapies be controversial? Because, in the case where the patient’s cells are cultured over the course of several weeks, the FDA has de­cided that they should be ‘drugs.’ Centeno, who is board certified in physical medicine, rehabilitation and pain management through the Ameri­can Board of Anesthesia, has been treat­ing patients for joint pain and arthritis with their own platelets, stem cells and growth factor proteins since 2005. He takes very strong exception to the FDA’s conclusions. In his view, using autolo­gous therapies on patients falls within the practice of medicine guidelines.

The procedure that triggered the FDA action is Centeno’s Regenexx C proce­dure for collecting and then expand­ing the patient’s own mesenchymal stem cells over the course of about 2weeks. That culturing of the patient’s cells caught the attention of FDA in the form of an untitled letter to his prac­tice in 2008. The battle over whether a patient’s own cells should be a drug has gained much attention, with both a Former FDA chief and deputy director (Andrew von Eschenbach, M.D. and Scott Gottlieb) writing separate Wall Street Journal Editorials that the FDA has its position on this issue (that cul­tured cells are drugs) dead wrong. In the meantime, Centeno has published two favorable papers on the cultured technique on the complications seen in 339 patients and on the outcome of 155 patients with severe knee arthritis.

Centeno has had no FDA issues with his four other autologous methods. His family of autologous procedures is: Re­genexx-SD, Regenexx-AD, Regenexx- SCP and Regenexx-PL-Disc. All are same-day procedures.

Unique Methodology

First, you probably wouldn’t recognize parts of the Centeno-Schultz clinic in Broomfield, Colorado, just outside of Denver. While all of the usual bits and pieces are there: exam rooms, procedure rooms, imaging equipment, etc…there’s also a large state of the art clean room lab facility. There a team of PhD’s and lab workers who not only process cells for re-injection, but also use many tools that are usually only found in university labs. Machines for analyzing gene expression, cell surface markers, fluorescent markers inside cells, and cartilage components abound. Incubators for culturing cells lie next to cryopreservation freezers that chill to -150C.

Centeno’s process is also unique. For the same-day procedure (Regenexx-SD), his clinic staff isolates the mesenchymal stem cells from a sample of the patient’s bone marrow. These cells are then injected back into the patient’s treatment area that same day and are combined with the growth factors found in the patient’s blood platelets. The goal is to deliver much greater numbers of stem cells to the injured area than the patient’s own body could manage.

Among the points of differentiation, the Regenexx procedure doesn’t use an automatic bedside centrifuge to prepare cells but uses sophisticated lab procedures that are part of a lab in a medical practice. Second, while some practices add platelet rich plasma to their stem cell concentrate, Centeno’s clinic uses a proprietary “super platelet” mix. By mixing highly concentrated lab prepared PRP (platelet rich plasma— slow release growth factors) and platelet lysate (immediately available growth factors), Centeno’s lab data shows that the adult stem cells grow many times more than just PRP alone.

184 Patient Follow-up Using Registry Data

Among Dr. Centeno’s passions is data. While treating patients with their own cells and growth factor proteins, Centeno is also collecting data. . He employs a full-time clinical research staff and has created proprietary software to help keep track of massive numbers of patients in a registry.

As of mid-March, he and his staff at his Broomfield, Colorado clinic have treated and are tracking approximately 4,300 orthopedic procedures with the Regenexx family of autologous biologic solutions.

On the website for the Centeno/Shultz clinic, Centeno has posted several of his published studies and podium presentations. One such study, which was derived from his clinic’s registry is regarding the Regenexx- SD procedure, provides data for 184 patients (73% male, 27% female, average age 50, 25.5 BMI [body mass index]) who’ve been treated with Regenexx-SD. According to Centeno, the patients who had their moderate to severe knee arthritis treated with Regenexx-SD experienced a mean improvement at 18 months of 56%. Patients who had the most severe arthritis (Kellgren grade 3-4) reported a 29% rate of improvement. More than 90% of patients reported some improve from baseline. Patients with moderately severe arthritis reported the best rate of mprovement. How long did the pain relief endure? According to his data, patients at the 18-month period reported greater levels of pain relief than the patients at 3-4 weeks.

Super Concentrated Platelets

One of Centeno’s other autologous procedures is a method of super concentrating platelets. Branded Regenexx-SCP, it is a mixture obtained from whole blood that is similar to cells and growth factor proteins, Centeno One of Centeno’s other autologous procedures is a method of super concentrating platelets. Branded Re­genexx-SCP, it is a mixture obtained from whole blood that is similar to platelet rich plasma (PRP) but it is low in red and white blood cells. Centeno claims that his process pro­duces platelet rich plasma that is ca­pable of stimulating more local stem cell growth than that produced by bed side PRP machines. “Most bed­side machines that make PRP can concentrate platelets up to five times normal concentrations. However, our data shows that better stem cell growth can be obtained with 10, 20, 30, or even 40x concentrations,” said Dr. Centeno. And Regenexx’s proce­dure, according to Centeno, delivers those higher levels.

147 Patient Registry Follow-Up With Regenexx PL-Disc

Regenexx PL-Disc is a procedure that removes the concentrated growth fac­tor proteins from the patient’s own platelets and makes them immedi­ately available for injection into the patient. Centeno tested his Regenexx PL-Disc against steroid epidural injec­tions for spine disc treatment. In his study, Centeno injected 147 patients with Regenexx PL-Disc and compared the results with 85 patients who’d been treated with steroid epidural injections.

The average Regenexx PL-Disc patient received an average of 1.25 injections and the average steroid epidural patient received 1.44 injections. Eleven of the steroid epidural patients crossed over to receive the Regenexx PL-Disc treat­ment. None of the Regenexx patients crossed over to the steroid epidural arm of the study.

According to Centeno’s registry, pa­tients who’d received their own growth factors via the Regenexx PL-Disc pro­cess reported a significant Functional Rating Index (FRI) score improvement. The FRI index measures the patient’s self-reported experience of pain as well as the ability to walk, sit, lift, bend, etc. The 60 patients treated with Re­genexx PL-Disc reported substantially better FRI scores (about 4x better) at three months than epidural steroid in­jections. The pain and function relief remained significant at the six-month level for Regenexx PL-Disc patients.

Centeno and the FDA

Approximately four and a half years ago, the FDA notified Centeno that the autologous cell material he was creating using his Regenexx C (cultured) proce­dure in his medical practice constituted the manufacturing of a drug. The FDA argued that because one of the solu­tions used in the process of expanding the patient’s cells was shipped via in­terstate commerce it made his process a “drug” under federal regulations. On that thin reed of an argument, the FDA said in court that Regenexx must only be performed pursuant to a New Drug Application and under the drug factory regulations known as current Good Manufacturing Practices (GMP).

On July 23, 2012, U.S. Federal District Court Judge Rosemary Collyer, in an admittedly close call, sided with the FDA. Regrettably for orthopedists and other doctors, Collyer’s decision to side with FDA means that the agency has the ability to apply drug production guidelines meant to apply to the likes of Pfizer and Merck to a physician’s practice. For example, as Centeno states, “Applying cGMP manufacturing guidelines to an OR would cost mil­lions per year per operating room and not measurably improve anything”.

Practice of Medicine Is an FDA Ju­risdiction?

“The interesting thing is that this is the first time FDA has concerned it­self in a ‘one-off’ therapy. The only existing model to compare this to is a five-day blastocyst procedure be­ing performed as part of IVF fertility treatments. IVF fertility treatments are practice of medicine and do not re­quire FDA approval and don’t follow drug mass manufacture guidelines and drug approvals; instead it uses guidelines designed for this purpose that were promulgated by the Col­lege of American Pathologists. In ad­dition, when asked if this position of applying drug standards to cultured autologous cells made any medical or public health common sense, ev­ery big player in the late 1990s said no. . This included everyone from the American Red Cross to multiple big physician organizations,” said Dr. Centeno.

This is not the first time this issue was triggered by an FDA action.

Fifteen years ago, in 1997, the FDA proposed a set of regulations (the same ones that Centeno has dealt with) that would classify stem cell transplant pro­cedures as prescription drugs or devic­es. In August 1998 ASCO (American Society of Clinical Oncology) filed its vehement opposition saying:

“ASCO objects in the strongest terms to FDA’s proposed regu­lation of stem cell transplants. This misguided proposal is unnecessary, would jeopardize the proper treatment of cancer patients and impede the de­velopment of new therapies, would substantially increase the cost of stem cell trans­plants, and exceeds FDA’s legal authority. Stem cell transplants are medi­cal procedures. Their use is the practice of medicine, not the manufacturing of biologi­cal products as FDA asserts. Transplantation procedures and their associated stem cells do not in any way resemble the products that FDA is chartered to regulate.”

The Society pointed to bone marrow transplants that have been performed since 1971 and have been standard therapy for certain conditions since the late 1970s.

Centeno has appealed the District Court’s ruling. As Lee Buckler, a noted biotechnology industry consultant said recently in his blog about the ruling, “This is a case that was always des­tined for the appellate courts regardless of which way the initial court ruled.” and “This is just the beginning of what will be a long and interesting battle. The ruling was nothing more than the granting of an injunction in response to the government’s motion for summary judgment.”

Regenexx Network?

Approximately 20 affiliated clinics around the United States are now of­fering versions of Centeno’s Regenexx autologous therapies. One clinic in the Cayman Islands still offers the cultured Regenexx-C procedure.

Centeno’s goal is to continue spending on his registry infrastructure and allow the outcome data being collected to do the talking. His Colorado clean room lab is humming with multiple scientists hired by generous private grants. Here mesenchymal stem cells are as rare as water out of the faucet. Their focus is greatly pursuing autologous biologic therapies – one patient at a time.

Category: FDA, Latest News

Chris Centeno, MD

Regenexx Founder

Chris Centeno, MD is a specialist in regenerative medicine and the new field of Interventional Orthopedics. Centeno pioneered orthopedic stem cell procedures in 2005 and is responsible for a large amount of the published research on stem cell use for orthopedic applications.
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