Scientists have long hoped that stem cells might have the power to treat diseases. But it's always been clear that they could be dangerous too, especially if they're not used carefully.
Now a pair of papers published Wednesday in the New England Journal of Medicine is underscoring both the promise and the peril of using stem cells for therapy.
In one report, researchers document the cases of three elderly women who were blinded after getting stem cells derived from fat tissue at a for-profit clinic in Florida. The treatment was marketed as a treatment for macular degeneration, the most common cause of blindness among the elderly. Each woman got cells injected into both eyes.
In a second report, a patient suffering from the same condition had a halt in the inexorable loss of vision patients usually experience, which may or may not have been related to the treatment. That patient got a different kind of stem cell derived from skin cells as part of a carefully designed Japanese study.
The Japanese case marks the first time anyone has given induced pluripotent stem (iPS) cells to a patient to treat any condition.
"These two reports are about as stark a contrast as it gets," says George Q. Daley, Harvard Medical School's dean and a leading stem cell researcher. He wrote an editorial accompanying the two papers. "It's really striking."
The report about the three women in their 70s and 80s who were blinded in Florida is renewing calls for the Food and Drug Administration to crack down on the hundreds of clinics that are selling unproven stem cell treatments for a wide variety of medical conditions, including arthritis, autism and stroke.
"One of the big mysteries about this particular case and the mushrooming stem cell clinic industry more generally is why the FDA has chosen to effectively sit itself out on the sidelines even as this situation overall grows increasingly risky to patients," says Paul Knoepfler, a University of California, Davis, stem cell researcher who has studied the proliferation of stem cell clinics.
"The inaction by the FDA not only puts many patients at serious risk from unproven stem cell offerings, but also it undermines the agency's credibility," Knoepfler wrote in an email.
In response to a query from Shots, an FDA spokeswoman wrote in an email that the agency is in the process of finalizing four new guidelines aimed at clarifying how clinics could use stem cells as treatments. The agency also noted that it had previously issued a warning to patients.
In the meantime, "consumers are encouraged to contact FDA and the appropriate state authorities in their jurisdictions to report any potentially illegal or harmful activity related to stem cell based products," the FDA email says.
Other researchers say the cases should stand as a warning to patients considering unproved stem cell treatments, especially those tried outside carefully designed research studies.
"Patients have to be wary and tell the difference between the snake oil salesmen who are going to exploit them and the kind of slow, painstaking legitimate clinical trials that are also going on," Daley says.
The New England Journal of Medicine report did not name the Florida clinic, but noted that the treatment was listed on a government website that serves as a clearinghouse for research studies. The sponsor is listed as Bioheart, Inc., which is part of U.S. Stem Cell Inc. in Sunrise, Fla.
Kristen Comella, the scientific director of U.S. Stem Cell, would not discuss the cases. "There were legal cases associated with eye patients that were settled under confidentiality, so I am not permitted to speak on any details of those cases due to the confidentiality clause," Comella said by phone.
She acknowledged, however, that the clinic had been performing the stem cell procedures. They were discontinued after at least two patients suffered detached retinas, she says.
But Comella defended the use of stem cells from fat tissue to treat a wide variety of other health problems.
"We have treated more than 7,000 patients and we've have had very few adverse events reported. So the safety track record is very strong," Comella says. "We feel very confident about the procedures that we do, and we've had great success in many different indications."
According to the New England Journal of Medicine report, The Florida clinic was using adult stem cells, which circulate in various parts of the body, including in fat tissue. While those cells may someday be turn out to be useful for treating disease, none have been proven to work.
The body produces a variety of stem cells. The kind that have generated the most excitement and controversy are human embryonic stem cells, which are derived from early human embryos and can be coaxed to become any kind of cell in the body.
Scientists are also excited about iPS cells, which can be made in the laboratory by turning any cell in the body, such as skin cells, into cells that resemble embryonic stem cells.
Those are the cells that were tested by the Japanese scientists. The stem cells were converted into retinal pigment epithelium (RPE) cells, which are the cells that are destroyed by macular degeneration.
"This represents a landmark," says Daley. "It's the first time any patient has been treated with cellular derivatives of iPS cells. So it's definitely a world first."
Daley noted that the scientists only treated one of the patient's eyes in case something went wrong, to ensure remaining vision would not be threatened in the other eye.
After at least a year, no complications had occurred and the patient had not experienced any further deterioration of vision in the treated eye. While that is promising, more patients would have to be treated and followed for much longer to know whether that approach is successful, Daley says.
"Given that macular degeneration is the most frequent cause of vision loss and blindness in the elderly and our population is aging, the prevalence of macular degeneration is going up dramatically," Daley says. "So to be able to preserve or even restore sight would be a really remarkable medical advance."
Despite the potentially encouraging results with the first patient, Daley noted that the Japanese scientists decided not to treat a second patient and suspended the study. That's because they discovered worrisome genetic variations in the RPE cells they had produced for the second patient.
"They weren't certain these would cause problems for the patient, but they were restrained enough and cautious enough that they decided not to go forward," Daley says. "That's what contrasts so markedly with the approach of the second group, who treated the three patients with an unproven stem cell therapy that ended up have devastating effects on their vision."
In this case, the New England Journal of Medicine report says, patients paid $5,000 each to receive injections of solutions that supposedly contained stem cells that were obtained from fat removed from their abdomens through liposuction.
Even though the safety and effectiveness of this procedure is unknown, all three patients received injections in both eyes.
"That's what led to these horrible results," says Thomas Albini, a retina specialist at the University of Florida's Bascom Palmer Eye Institute, who helped write the report.
Before the procedure, all three women still had at least some vision. Afterwards, one woman was left completely blind while the other two were effectively blind, Albini and his colleagues reported.
The cases show that patients need to be warned that something that "sounds too good to be true may indeed be too good to be true and may even be horrible," Albini says.
See original here:
3 Women Blinded By Unproven Stem Cell Treatments - Alabama Public Radio
- Woman Who Conceived Twins in Rape Rejects Abortion, Shares How Her 21-Year-Old Twins Saved Her Life - The Epoch Times - October 13th, 2022
- Kid Captain Eli Belser takes the field with Hawkeyes, celebrating two years cancer free - UI The Daily Iowan - September 8th, 2022
- How space technology like the James Webb telescope is improving healthcare on Earth - The National - July 27th, 2022
- How COVID-19, Long COVID, and COVID Vaccines Differ Between Males and Females - CreakyJoints - July 27th, 2022
- Researchers find fabrication of artificial heart for transplant - ThePrint - July 19th, 2022
- Paolo Macchiarini - Wikipedia - July 3rd, 2022
- President Freeman Hrabowski prepares for retirement after turning UMBC into the top producer of Black M.D., Ph.D. graduates - Afro American - July 3rd, 2022
- Women find community in STEM fields at UA - The University of Alabama Crimson White - April 19th, 2022
- Poker Run event planned to benefit twins with rare syndrome - The Andalusia Star-News - Andalusia Star-News - April 6th, 2022
- Dr Borehams Crucible: Mesoblast within months of 3 major trial results, key regulatory decision - Stockhead - July 6th, 2020
- Alabama Stem Cells | Stem Cell TV - September 12th, 2019
- Only Cosmetic Stem Cell Therapy in Alabama - msbmd.com - April 20th, 2019
- Stem Cell Therapy in Houston, TX | National Stem Cell Centers - March 23rd, 2019
- Central Alabama Pain Management Center Established 1993 - March 6th, 2019
- Stem Cell Mobile Alabama 36607 - January 4th, 2019
- Stem Cell Birmingham Alabama 35282 - August 30th, 2018
- USA College of Medicine - University of South Alabama ... - July 24th, 2018
- Researchers find new glioblastoma inhibitor - Patient Daily - August 24th, 2017
- A Chip That Reprograms Cells Helps Healing, At Least In Mice - Alabama Public Radio - August 12th, 2017
- 'Happiness' Explores The Complex Push And Pull Of Human Relationships - Alabama Public Radio - August 12th, 2017
- Hampton Creek to enter clean meat market in 2018: 'We are building a multi-species, multi-product platform' - FoodNavigator-USA.com - June 30th, 2017
- Brain Tumors: Still Devastating, but Treatment Has Come a Long Way - Newswise (press release) - June 20th, 2017
- Walk for "terrible, awful" disease - Timmins Press - June 18th, 2017
- Rare disease hits 2 of family's 4 children - The Ledger - June 18th, 2017
- Hill-Rom Holdings, Inc. (HRC) Reaches $76.89 52-Week High, Biotime (NYSEMKT:BTX) Shorts Increased By 4.64% - UtahHerald.com - June 13th, 2017
- STEM College Students Who Learn by Example May Lack Key Attribute - GoodCall News (blog) - June 13th, 2017
- Wolf Evolution and Settled Science - PLoS Blogs (blog) - June 8th, 2017
- 3D-Printed Patch Mends Hearts - Photonics.com - June 6th, 2017
- When states have strong guns laws, they also have fewer fatal police shootings - Los Angeles Times - May 19th, 2017
- Top graduating senior in 'crazy race to the finish line' | Berkeley News - UC Berkeley - May 9th, 2017
- 3D-printed patch could lead to new treatments for patients after a heart attack - Biotechin.Asia - May 5th, 2017
- Meet Curry Cates: 2017 Big Man on Campus - The Auburn Plainsman - April 28th, 2017
- Andrews Institute Looks Ahead - Inweekly - April 27th, 2017
- UMN research team fixes broken hearts with 3D-printed tissue patch - Minnesota Daily - April 27th, 2017
- Bengals set to hold onto McCarron for at least 1 more year | Sports ... - Newsexaminer - April 27th, 2017
- Andrews Institute Celebrates Ten Years, Looks to Next Ten - WUWF - April 25th, 2017
- Scientists want to help you recover heart attack with a 3d printed patch - Industry Leaders Magazine - April 25th, 2017
- Bengals set to hold onto McCarron for at least 1 more year - WTOP - April 25th, 2017
- Mending broken hearts - The Sydney Morning Herald - April 22nd, 2017
- 3D-printed Patch Can Help Mend a 'Broken' Heart | Technology ... - Technology Networks - April 22nd, 2017
- UAB performs Alabama's first transplant where cadaver liver is 'kept ... - Medical Xpress - April 22nd, 2017
- Heart-healing patch has got the beat - New Atlas - April 20th, 2017
- 3D-printed Patch Can Help Mend a 'Broken' Heart - Technology Networks - April 19th, 2017
- 3D-Printed Patch Can Help Mend a 'Broken' Heart | Lab Manager - Lab Manager | News (press release) (blog) - April 18th, 2017
- 3D-printed patch can help mend a broken heart - UMN News - April 14th, 2017
- Bart Starr returns to Tijuana for stem cells - USA Today - April 10th, 2017
- Pioneering Investigators in Experimental Heart Stem Cell and ... - Newswise (press release) - April 9th, 2017
- The mystique of the invisible: Understanding mental illness - Glens Falls Post-Star - March 27th, 2017
- The Equities Research Analysts' Updated EPS Estimates for March, 20th (AIMT, AMID, AUPH, AVD, BDREF, BPTH ... - Petro Global News 24 - March 23rd, 2017
- Hettinger, ND gets state-of-art new clinic and vets - AG Week - March 21st, 2017
- Harvard Scientists Call For Better Rules To Guide Research On 'Embryoids' - Alabama Public Radio - March 21st, 2017
- State-of-art new clinic - and vets - The Dickinson Press - March 19th, 2017
- Hot Biotech Stocks Recap: Nektar Therapeutics (NASDAQ:NKTR), Biostage, Inc. (NASDAQ:BSTG) - The Voice Registrar - March 7th, 2017
- Trump's coal council to drill down on advanced technology - Washington Examiner - March 6th, 2017
- Embryo Experiments Reveal Earliest Human Development, But Stir Ethical Debate - Alabama Public Radio - March 3rd, 2017
- Houston Solar Car featured in IMAX film, Smithsonian - Northeast Mississippi Daily Journal - February 24th, 2017
- News Scan for Feb 20, 2017 - CIDRAP - February 21st, 2017
- On Second Attempt, SpaceX Launches Rocket At NASA's Historic Pad - Alabama Public Radio - February 20th, 2017
- A Liftoff Deferred: SpaceX Mission From NASA's Historic Launch Pad Delayed - Alabama Public Radio - February 19th, 2017
- ECO VIEWS: Advertising is not just for humans - Tuscaloosa News - February 13th, 2017
- ECOViEWS: Advertising is not just for humans - Aiken Standard - February 11th, 2017
- Unsung: Jewel Plummer Cobb - Undark Magazine - February 8th, 2017
- Bart Starr prepares to watch Super Bowl from home as health keeps improving - USA TODAY - February 7th, 2017
- Romero '87 Sees ACLU Donations Soar, Munson *79 to Lead RIT, and More - Princeton Alumni Weekly - February 7th, 2017
- Meet the Team - The University of Alabama at Birmingham - January 26th, 2017
- Tallasee Dog Undergoes Stem Cell Procedure - Alabama News - December 30th, 2016
- Dermal fibroblast - Wikipedia - November 27th, 2016
- Stem Cell Hair Growth Huntsville | Steve Latham Hair ... - September 12th, 2016
- Adult Stem Cell Success - Children of God for Life - April 18th, 2015
- Can cancer vaccines prolong survival? - April 7th, 2015
- Human embryonic stem cells clinical trials - Wikipedia ... - February 19th, 2015
- Christian singer Carman shares testimony of cancer victory - February 2nd, 2015
- Urban Dictionary: stem cell - January 21st, 2015
- Huntsville blood bank to preserve umbilical cord tissues - November 25th, 2014
- CGS : 60 Minutes Exposes Stem Cell Scams Again - November 22nd, 2014
- What Are Stem Cells? (with pictures) - wiseGEEK - November 16th, 2014
- alabama StemCells Therapy StemCells Therapy - October 24th, 2014
- Life Issues Institute - Successes of Adult Stem Cell ... - October 16th, 2014
- A heartbeat away? Hybrid 'patch' could replace transplants - October 1st, 2014
- Huntsville AL Resources - Stem Cells: Get Facts on Uses ... - September 29th, 2014