Stem Cell Therapy: The Science of Healing and the Challenge of Translation
Just imagine a medicine that doesn’t just cover up symptoms or keep disease at bay, but one that can repair the damaged tissue of your body from the inside out. That’s stem cell therapy, and it’s why scientists have been pursuing it for decades. But translating the promise of this technology from the laboratory to your local hospital is one of the most complex challenges in modern medicine.
What Exactly Are Stem Cells?
Stem cells are basically building blocks of the body. Most other cells are specialized. A brain cell can transmit signals, and a heart cell can beat – but a brain cell can’t do the work of a heart cell and vice versa. Stem cells, meanwhile, are generalized. They can create copies of themselves, or if you tell them what to do, can be guided to become different kinds of specialized cells for different purposes.
The ability to generate any kind of cell from them was demonstrated in 1961, but researchers demonstrated ability to grow blood cells from bone marrow stem cells for blood cell production. These can then reproduce to fill your brain with 7 trillion cells to do all you brain’s thinking. Their capacity to specialize in other cells wasn’t identified as fully as they are now until the 1990s, when the creation of stem cells from human embryonic cells was announced in 1998.
Another huge breakthrough happened in 2006 when it was discovered that researchers can essentially convert any adult cell type-such as skin cells-back into a form that act like stem cells-called Induced Pluripotent stem cells, or IPs cells.
These IPs cells make it possible to tailor these types of cells to any individual without the ethical implications associated with embryonic stem cell research. The stem cells now mainly employed in clinical trials are mesenchymal stem cells (MSCs) – which can be extracted from bone marrow, fat, or the umbilical cord and the placenta - and are capable of calming inflammations and promoting healing.
How is that Possible?
Stem cells can help heal in a variety of ways, the one that springs most naturally to mind, the repair of injured tissues, isn’t always the primary benefit. The research that have produced promising results for patients with MS or Crohn’s indicate other factors could play a key role in cell repair:Cells themselves as an ‘end product.’ the theory behind which is that you’d basically grow new replacement cells for your heart or brain – you’d be repairing from the inside by effectively regrowing tissues – but at present it’s not so clear how you would do it reliably with enough precision. Many studies using MSCs are showing effects on patient’s immune systems - stem cells ‘switch’ off inflammatory immune cells which have caused many forms of cancer including MS.Chemical signals. Stem cells release a combination of growth factor, protein and signaling ‘micro vesicles’ – essentially tiny biological messengers that signal the ‘neighborhood’ to repair or blood vessels to regenerate to form a more robust environment where damaged tissue can heal. MSCs actually ‘talk’ to immune cells and stop overactivity within the body’s own defense mechanisms, ‘de-escalating’ them so the immune system stop attacking body tissues.They have a homing capability – essentially an instinct for injury and damage. When introduced into the blood they travel to an area of damage and make adjustments to promote healing. They decrease scaring, protect healthy surrounding tissues and ‘restructure’ the environment to allow for natural healing.
Where is this Working NOW?
A number of exciting clinical trials and applications are now helping to give credence to the possibility that one day stem cells could be the answer to many currently untreatable diseases. Among them:Treatment of autoimmune conditions. According to a forthcoming paper on autoimmune research for 2025, several research trials on Crohn’s disease, lupus and scleroderma have already resulted in the positive effects observed in early-stage research aimed at identifying therapeutic safety and signs of patient benefit. For a 2025 study of a class of ‘clot’ problems referred to as the ‘painful to chronic and dangerous tolimb –threatening disease’ (otherwise referred to as limb ischaemia,)umbilical cord blood treatment for patients that received these ‘treatments in the ‘ arteries ‘or ‘channels’. The outcomes from the study observed marked improvement in limb blood flow, reduced leg and foot pain, and improved kidney function as well as protection of nerves from damage from disease as well. An interesting treatment which was initiated from an examination with respect to’moyamoya’ disease – which creates arteries in the brain become severely narrowed so to stop circulation to the brain – the researchers discovered bone marrow stem cells encourage ‘development’ to create blood vessel and also protect cells within the brain which showed some results as the stem cells worked their way around the blood brain network. The researchers stated the trial appeared to have proven safe and has shown that blood in the brain has improved circulation.
So Why isn’t Everyone Having This… and How do I GET SOME!??!
If these cells have the potential to heal so much, why aren’t doctors readily administering it? Several factors come into play: Cost, complexity, and caution.The creation of therapies requires the painstaking procurement, culturing, quality testing, and, at times, genetic manipulation of cells. Whether these cells come from the patient or from a donor, they require costly laboratory work - significantly more than the price tag on any standard medication you take.Safety is also a major consideration. Stem cell from the cord and marrow generally are not associated with immune complications. However, those cells from another individual may be rejected by body’s Immune cells. More worrisome are that the traits that allow these cells to be versatile could result in unchecked replication and development of tumors – especially with fetal or ip stem cells which are particularly adaptable. Many trials do not have long term safety information to assess risk yet.The response of individual patients varies widely with only some experiencing benefit. As such there is still a lack of clarity as to which candidates would benefit.
The Danger of Hype
The problem the ‘science based’ research is up against at the moment is an explosion of dubious businesses touting fake cures for pretty much every illness known, and this includes numerous centers of unproven stem cell ‘therapies’ that don’t use proper scientific methods to ascertain how many, how much of what and where to best introduce these stem cells to provide best and or any therapeutic outcomes. The fact is that in the last ten years these have quadrupled with the FDA only approving a very limited and specific amount of stem cell treatment such as bone marrow procedures to treat certain blood cancer in. The most widely used method is still bone marrow transplantation, which has helped treat cancers for decades now by infusing blood-forming stem cells into the patient. A new field has developed where eye stem cells are used for visual impairment and these are now approved.
Science moves at the speed of evidence not hope, and that requires time. For the broader field of stem cell therapies to fulfill their promise, it will need more long-term, rigorously designed, and randomized clinical trials, greater consensus on regulatory guidelines and standards around the world, and strong protections for the millions of people being preyed upon by dishonest companies.