In 2020, the National Eye Institute is launching a clinical trial to test the safety of a patient-specific stem cell therapy to treat geographic atrophy, the advanced dry form of age-related macular degeneration (AMD). The protocol is the first of its kind in the United States to replace a patients eye tissue with tissue derived from induced pluripotent stem (iPS) cells engineered from a patients own blood.
If successful, this new approach to AMD treatment could prevent millions of Americans from going blind. AMD is a leading cause of vision loss in people age 65 and older. By 2050, the estimated number of people with AMD is expected to more than double from 2.07 million to 5.44 million.
The first symptoms of age-related macular degeneration are dark spots in ones central vision, which is used for daily activities such as reading, seeing faces and driving. But as the disease progresses, the spots grow larger and increase in number, which can lead to significant loss of the central vision.
There are two kinds of AMD: the neovascular, or wet, form and the geographic atrophy, or dry form. Remarkable progress has been made in the ability to prevent vision loss from the neovascular form. In particular, anti-VEGF therapy has been shown to preserve vision required for driving among about half of patients who take it for five years.
By contrast, no therapies exist for treating geographic atrophy. Should this NEI-led study, and future studies, confirm the safety and efficacy of iPS cell-derived RPE-replacement therapy, it would likely be the first therapy approved for the treatment of geographic atrophy.
To produce the therapy, we isolate cells from a patients blood and, in a lab, convert them into iPS cells. These iPS cells are theoretically capable of becoming any cell type of the body.
The iPS cells are then programmed to become retinal pigment epithelium (RPE). RPE cells are crucial for eye health because they nourish and support photoreceptors, the light-sensing cells in the retina. In geographic atrophy, RPE cells die, leading to the death of photoreceptors and blindness. The goal of the iPS cell-based therapy is to protect the health of the remaining photoreceptors by replacing dying RPE tissue with healthy iPS cell-derived RPE tissue.
We grow a single-cell layer of iPS cell-derived RPE on a biodegradable scaffold. That patch is then surgically placed next to the photoreceptors where, as we have seen in animal models, it integrates with cells of the retina and protects the photoreceptors from dying.
This years clinical trial is a phase I/IIa study, which means it will focus solely on assessing the safety and feasibility of this RPE replacement therapy. The dozen participants will have one eye treated. Importantly, everyone will already have substantial vision loss from very advanced disease, such that the therapy is not expected to be capable of significant vision restoration. Once safety is established, later study phases will involve individuals with earlier stage disease, for which we are hopeful that therapy will restore vision.
A safety concern with any stem cell-based therapy is its oncogenic potential: the ability for cells to multiply uncontrollably and form tumours. On this point, animal model studies are reassuring. When we genetically analysed the iPSC-derived RPE cells, we found no mutations linked to potential tumour growth.
Likewise, the risk of implant rejection is minimised by the fact that the therapy is derived from patient blood.
Several noteworthy innovations have occurred along the way to launching the trial. Artificial intelligence has been applied to ensure that iPS cell-derived RPE cells function similar to native RPE cells. In addition, Good Manufacturing Practices, have been developed to ensure quality control, which will be crucial for scaling up production of the therapy should it receive approval from the U.S. Food and Drug Administration. Furthermore, the iPS cell-derived RPE patch is being leveraged to develop more complex RPE/photoreceptor replacement therapies.
Potential breakthroughs in treatment cannot move forward without the support of patients willing to participate in clinical trial research. Patients who volunteer for trials such as this are the real heroes of this work because theyre doing it for altruistic reasons. The patients in this first trial are not likely to benefit, so they are doing it to help move the field forward for future patients.
Editor's Recommended Articles
Read the original post:
Eye health: Testing the safety of stem cell therapy for age-related macular degeneration - Open Access Government
- Stem Cell Therapy for Kidney Failure [Last Updated On: April 1st, 2011] [Originally Added On: April 1st, 2011]
- Dogged by pain -- stem cell therapy for dogs [Last Updated On: June 24th, 2013] [Originally Added On: April 3rd, 2011]
- Dogs now getting stem cell therapy [Last Updated On: April 8th, 2011] [Originally Added On: April 8th, 2011]
- Stem Cells for Spinal Cord Injury: Community Outreach San Diego 2011 - Trish Stressman [Last Updated On: April 11th, 2011] [Originally Added On: April 11th, 2011]
- Stem Cell Treatment Doing Wonders For Autistic Boy [Last Updated On: April 14th, 2011] [Originally Added On: April 14th, 2011]
- Is Stem Cell Therapy right for your pet [Last Updated On: April 14th, 2011] [Originally Added On: April 14th, 2011]
- Regenerative Medicines [Last Updated On: May 19th, 2011] [Originally Added On: May 19th, 2011]
- Stem Cell Therapy for Multiple Sclerosis [Last Updated On: June 24th, 2013] [Originally Added On: May 20th, 2011]
- Adult Stem Cell Therapy for Multiple Sclerosis [Last Updated On: May 23rd, 2011] [Originally Added On: May 23rd, 2011]
- Heart Failure Patient After Adult Stem Cell Therapy [Last Updated On: June 24th, 2013] [Originally Added On: May 30th, 2011]
- Stem Cell Therapy For Alzheimer's/Dementia [Last Updated On: June 24th, 2013] [Originally Added On: June 2nd, 2011]
- Stem Cell Therapy For Alzheimer's/Dementia [Last Updated On: June 7th, 2011] [Originally Added On: June 7th, 2011]
- Stem Cell Therapy Injections [Last Updated On: June 24th, 2013] [Originally Added On: June 8th, 2011]
- Clinical Advances in Adult Stem Cell Therapy: Dr. Jorge Paz [Last Updated On: June 24th, 2013] [Originally Added On: June 11th, 2011]
- Stem Cell Therapy MS: Sam Harrell and The Superbowl [Last Updated On: June 12th, 2011] [Originally Added On: June 12th, 2011]
- Stem Cell Therapy MS: Sam Harrell and The Superbowl [Last Updated On: June 24th, 2013] [Originally Added On: June 14th, 2011]
- Lou Gehrig's Disease (ALS): UCSD Team's Stem Cell Therapy Rationale [Last Updated On: June 14th, 2011] [Originally Added On: June 14th, 2011]
- Stem Cell Injection Treatment - Stem Cell Therapy [Last Updated On: June 18th, 2011] [Originally Added On: June 18th, 2011]
- edivet America Dog Arthritis Stem Cell Therapy Stem Cell Therapy for Equine 1 [Last Updated On: June 24th, 2013] [Originally Added On: June 23rd, 2011]
- Lou Gehrig's Disease (ALS): UCSD Team's Stem Cell Therapy Approach [Last Updated On: June 25th, 2011] [Originally Added On: June 25th, 2011]
- Adult Stem Cell Therapy Clinical Advances - Dr. Jorge Paz in San Diego, CA March 2011 [Last Updated On: July 3rd, 2011] [Originally Added On: July 3rd, 2011]
- Adult Stem Cell Therapy Clinical Advances - Dr. Jorge Paz in San Diego, CA March 2011 [Last Updated On: June 24th, 2013] [Originally Added On: July 15th, 2011]
- Duffy Gets Stem Cell Therapy [Last Updated On: June 24th, 2013] [Originally Added On: July 15th, 2011]
- WAVE3 News Adipose Stem Cell Therapy [Last Updated On: June 24th, 2013] [Originally Added On: July 16th, 2011]
- Lou Gehrig's Disease (ALS): UCSD Team's Stem Cell Therapy Approach [Last Updated On: June 24th, 2013] [Originally Added On: July 16th, 2011]
- Clinical Advances in Adult Stem Cell Therapy - Dr. Jorge Paz Rodriguez (Miami) [Last Updated On: June 24th, 2013] [Originally Added On: July 21st, 2011]
- Stem Cell Therapy for Cerebral Palsy - Holly Catalano [Last Updated On: June 24th, 2013] [Originally Added On: August 2nd, 2011]
- Bone Marrow Aspiration - Stem Cell Therapy [Last Updated On: August 5th, 2011] [Originally Added On: August 5th, 2011]
- Dr. Chein discusses Autologous Stem Cell Therapy - Palm Springs [Last Updated On: June 24th, 2013] [Originally Added On: August 12th, 2011]
- Stroke Victim Improved With Stem Cell Therapy. More at http://www.stemcellfusion.com [Last Updated On: June 24th, 2013] [Originally Added On: August 14th, 2011]
- Dr. Craig Saunders Adult Stem Cell Therapy [Last Updated On: August 15th, 2011] [Originally Added On: August 15th, 2011]
- Embryonic stem cell therapy in China (www.esctherapy.com) [Last Updated On: June 24th, 2013] [Originally Added On: August 16th, 2011]
- Ying Liu discusses IPS cell therapy for ALS [Last Updated On: June 24th, 2013] [Originally Added On: August 16th, 2011]
- Stem Cell Therapy: Healing Force of the future [Last Updated On: September 19th, 2011] [Originally Added On: September 19th, 2011]
- Benefits of STEM CELL THERAPY - Adipose Tissue [Last Updated On: September 22nd, 2011] [Originally Added On: September 22nd, 2011]
- Stem Cell Therapy Skin Repair and Anti-Wrinkle Cream [Last Updated On: June 24th, 2013] [Originally Added On: September 24th, 2011]
- Cardiac Stem Cell Therapy [Last Updated On: June 24th, 2013] [Originally Added On: September 24th, 2011]
- Holly Huber on Recovery: Stem Cell Therapy for Multiple Sclerosis Community Outreach Dallas, TX 2011 [Last Updated On: June 24th, 2013] [Originally Added On: September 24th, 2011]
- Stroke Victim Improved With Stem Cell Therapy. More at http://www.stemcellfusion.com [Last Updated On: September 25th, 2011] [Originally Added On: September 25th, 2011]
- A Touch of Love® - Stem Cell Therapy for Pets-Dr. Danny DeRose-Part 3 [Last Updated On: September 27th, 2011] [Originally Added On: September 27th, 2011]
- Adult Stem Cell Therapy for Multiple Sclerosis [Last Updated On: June 24th, 2013] [Originally Added On: September 28th, 2011]
- Multiple Sclerosis Stem Cell Therapy News Coverage [Last Updated On: June 24th, 2013] [Originally Added On: October 1st, 2011]
- The Spinal Cord Journey - Stem cell therapy stories from three spinal cord injury patients [Last Updated On: October 6th, 2011] [Originally Added On: October 6th, 2011]
- Peyton Manning Stem Cell Therapy: Some Doctors Cry Foul Over European Treatment - Video [Last Updated On: October 13th, 2011] [Originally Added On: October 13th, 2011]
- Stem-Cell-Therapy-in-China.wmv - Video [Last Updated On: October 13th, 2011] [Originally Added On: October 13th, 2011]
- Randolph veterinarian uses new stem cell therapy on ailing pets - Video [Last Updated On: June 24th, 2013] [Originally Added On: October 13th, 2011]
- Stem Cell Therapy for Rheumatoid Arthritis - Video [Last Updated On: June 24th, 2013] [Originally Added On: October 14th, 2011]
- Holly Huber on Recovery: Stem Cell Therapy for Multiple Sclerosis Community Outreach Dallas, TX 2011 - Video [Last Updated On: October 14th, 2011] [Originally Added On: October 14th, 2011]
- Affordable Stem Cell Therapy in Guatemala (2hrs from Miami) - Video [Last Updated On: June 24th, 2013] [Originally Added On: October 15th, 2011]
- Stem Cell Research: Macular Degeneration - Video [Last Updated On: October 18th, 2011] [Originally Added On: October 18th, 2011]
- Duffy Gets Stem Cell Therapy - Video [Last Updated On: October 18th, 2011] [Originally Added On: October 18th, 2011]
- VetCell's StemRegen - the original and best stem cell therapy for equine tendon injuries - Video [Last Updated On: October 20th, 2011] [Originally Added On: October 20th, 2011]
- Macular degeneration - Stem Cell therapy (English subtitles) - Video [Last Updated On: October 20th, 2011] [Originally Added On: October 20th, 2011]
- Stem Cell Therapy for Rheumatoid Arthritis - Community Outreach Dallas - Darnell Morris - Video [Last Updated On: June 24th, 2013] [Originally Added On: October 21st, 2011]
- Adult Stem Cell Therapy for Congestive Heart Failure [Last Updated On: June 24th, 2013] [Originally Added On: October 21st, 2011]
- Stem Cell Therapy for Critical Limb Ischemia: First Choice or Last Ditch? - Video [Last Updated On: October 22nd, 2011] [Originally Added On: October 22nd, 2011]
- WAVE3News Adipose Stem Cell Therapy - Video [Last Updated On: October 22nd, 2011] [Originally Added On: October 22nd, 2011]
- Stem Cell Therapy in Cardiac Disease - Video [Last Updated On: June 24th, 2013] [Originally Added On: October 24th, 2011]
- Stem Cell Treatment for Autism: Community Outreach Miami, Florida - May 2011 - Video [Last Updated On: June 24th, 2013] [Originally Added On: October 24th, 2011]
- Pre Post n 6 Months Post Stem Cell Therapy of Dystonic Cerebral Palsy - Video [Last Updated On: June 24th, 2013] [Originally Added On: October 24th, 2011]
- Stem Cell Treatment for Rheumatoid Arthritis - "I am basically pain free." - Video [Last Updated On: October 26th, 2011] [Originally Added On: October 26th, 2011]
- UMBILICAL CORD STEM CELL THERAPY - Video [Last Updated On: June 24th, 2013] [Originally Added On: October 26th, 2011]
- Stem Cell Therapy for Peripheral Artery Disease - Video [Last Updated On: June 24th, 2013] [Originally Added On: October 26th, 2011]
- Multiple Sclerosis Adult Stem Cell Therapy - Video [Last Updated On: June 24th, 2013] [Originally Added On: October 26th, 2011]
- Stem Cell Therapy for Multiple Sclerosis Stimulates IDO - Video [Last Updated On: June 24th, 2013] [Originally Added On: October 26th, 2011]
- HIV/AIDS: Spotlight on Stem Cell Research - John Zaia - Video [Last Updated On: October 26th, 2011] [Originally Added On: October 26th, 2011]
- Stem cell treatment by Adiva Health Care India after Spinal Cord Injury - Video [Last Updated On: October 27th, 2011] [Originally Added On: October 27th, 2011]
- Stem Cell Treatment for Spinal Cord Injury - Video [Last Updated On: October 28th, 2011] [Originally Added On: October 28th, 2011]
- Lou Gehrig's Disease: Stem Cell Therapy Pre-Clinical Studies - Video [Last Updated On: October 28th, 2011] [Originally Added On: October 28th, 2011]
- Stem Cell Treatment for Spinal Cord Injury - Video [Last Updated On: June 24th, 2013] [Originally Added On: October 28th, 2011]
- Holly Huber on Recovery: Stem Cell Therapy for Multiple Sclerosis Community Outreach San Diego CA - Video [Last Updated On: June 24th, 2013] [Originally Added On: October 28th, 2011]
- Stem Cell Treatment for Rheumatoid Arthritis - "I got my life back" - Video [Last Updated On: October 28th, 2011] [Originally Added On: October 28th, 2011]
- Adult Stem Cell Therapy Following Heart Attack and Stroke - Video [Last Updated On: October 28th, 2011] [Originally Added On: October 28th, 2011]
- Stem Cells - Treatment for Autism - Video [Last Updated On: November 2nd, 2011] [Originally Added On: November 2nd, 2011]
- Stem Cell Treatment Diabetes - Video [Last Updated On: November 7th, 2011] [Originally Added On: November 7th, 2011]
- Stem Cell Therapy: Psoriatic Arthritis Treatment - Video [Last Updated On: June 24th, 2013] [Originally Added On: November 8th, 2011]
- Stem Cell Therapy Cure Hair Loss. More at http://www.stemcellfusion.com - Video [Last Updated On: June 24th, 2013] [Originally Added On: November 10th, 2011]
- BioLogic Stem Cell Therapy - Video [Last Updated On: November 16th, 2011] [Originally Added On: November 16th, 2011]
- BioLogic Stem Cell Therapy - Video [Last Updated On: June 24th, 2013] [Originally Added On: November 16th, 2011]
- AVS Stem Cell Therapy - Video [Last Updated On: June 24th, 2013] [Originally Added On: November 17th, 2011]