Traumatic brain injury (TBI) occurs when sudden trauma damages the brain. While mild TBI can temporarily affect brain cells, more serious injuries can lead to bleeding, torn tissue, and bruising which can cause lasting complications. Brian damage studies have shown that stem cells may be an alternative option for patients to explore.
According to research, exogenous stem cells can target damaged brain tissue. They can then partake in the repair process by differentiating into cells that replaced the damaged tissue, while simultaneously releasing anti-inflammatory properties. These effects have the ability to promote improvements in neurological function in people with TBI.
Several types of stem cells have been studied for TBI, including:
- Mesenchymal Stem Cells: Typically retrieved from adult bone marrow, mesenchymal stem cells (MSCs) aid in tissue regeneration, the inhibition of inflammation, and the recruitment of progenitor cells to replace lost cells. Other studies have shown improvement in neurological function after MSC treatment was administered.
- Neural Stem Cells: Neural stem cells (NSCs) self-renew and can differentiate into different types of cells, including neurons. According to results from animal studies, transplanted NSCs were able to mature into different brain cells and survive for at least five months. Studies have also shown that NSC injection enhances cognitive and learning abilities, as well as motor function.
- Multipotent Adult Progenitor Cells: Known for their ability to differentiate into endothelial cells, multipotent adult progenitor cells (MAPCs) have been shown to improve memory retrieval, the ability to retain information, spatial learning, and dyskinesia (impairment of voluntary movement). These cells have particularly powerful anti-inflammatory response characteristics.
- Induced Pluripotent Stem Cells: In 2007, Japanese scientists reprogramed somatic cells into a new class that resembled embryonic stem cells, known as induced pluripotent stem cells (iPSCs). Using the TBI model, researchers have determined that iPSCs could improve neurological function after transplanted into the injured area and specifically enhance motor function.
- Endothelial Progenitor Cells: Endothelial progenitor cells (EPCs) are the precursors of vascular endothelial cells found in the bone marrow. They are recruited to the site of injury, especially after brain injury. In a brain injury model, endothelial colony-forming cells (ECFCs) showed an ability to home in on the injured area and repair the blood-brain barrier. They can enhance capillary formation and reduce inflammation.
While further research is needed on these methods of stem cell therapy, early results do show promise in their benefits for those exploring regenerative medicine options for Traumatic Brain Injury. Contact a Care Coordinator today for a free assessment!
Traumatic brain injury is a single name given to a broad variety of conditions. In every instance of traumatic brain injury, some external force causes damage to the brain. This may be mild and short-lived, such as a concussion, or severe and permanent, such as severe head trauma. The initial trauma or injury can cause a number of injuries to the skull and brain such as skull fracture, cerebral contusion (“brain bruise”), cerebral edema (“brain swelling”), or hemorrhage (“brain bleed”).
Traumatic brain injury can also cause several secondary injuries that may continue for hours or days. The secondary effects of traumatic brain injury include:
- Electrolyte imbalances
- Mitochondrial dysfunction
- Ischemia (lack of blood flow to parts of the brain)
- Brain cell destruction
These secondary traumatic brain injuries can cause long-term and even permanent neurological dysfunction.
Unfortunately, there are very few treatments for traumatic brain injury. Neurosurgeons can sometimes stop brain bleeding, stabilize skull fractures, and reduce brain swelling; however, there is little that can be done to stop the secondary effects of traumatic brain injury. Doctors have tried using steroids or hypothermia (cooling the patient) to decrease inflammation and stop further injury, but these interventions are not highly effective.
Ideally, one would give a treatment soon after a person has had a traumatic brain injury. This treatment would reduce or block the secondary effects of traumatic brain injury. Scientists are studying whether stem cell treatment can do that very thing.
Researchers recently showed that exosomes from bone marrow mesenchymal stem cells were able to reduce the secondary effects of traumatic brain injury. They humanely caused a traumatic brain injury in a group of mice. Fifteen minutes after the TBI, half the mice were given an injection of stem cells and the other half received a placebo (i.e. saltwater).
The mice that received the stem cell exosome treatment did substantially better than the mice who received a placebo. Stem cell exosome treatment substantially reduced the size of the damage to the brain compared to control. Moreover, mice that received stem cell exosome treatment did better on sensory, motor, reflex, and balance tests. In other words, stem cell exosome treatment helped mice with traumatic brain injury move better than those that did not receive stem cell exosome treatment.
The scientists went on to show that exosome treatment helped block the secondary effects of traumatic brain injury on the cellular and molecular level. In short, stem cell exosome treatment reduced inflammation in the brain from TBI.
Taken together, these results strongly suggest that treatment with exosomes from bone marrow mesenchymal stem cells soon after traumatic brain injury has the ability to protect the brain from damage. Of course, this treatment will need to be tested in humans who have had incidental TBI. Nevertheless, the basic science results are quite exciting since few neuroprotective agents, if any, can block the secondary effects of traumatic brain injury the way exosomes did in this scientific report.
Reference: Haoqi, N., et al. (2019). Exosomes Derived From Bone Mesenchymal Stem Cells Ameliorate Early Inflammatory Responses Following Traumatic Brain Injury. Frontiers in Neuroscience. 2019 Jan 24; 13:14.
Traumatic brain injury (TBI), also known as concussion, is a common condition that affects thousands of people every year in the United States alone. The most challenging aspect of TBI is its vague clinical presentation, which makes it difficult for physicians to promptly diagnose and treat this condition without a proper history of trauma.
According to the Centers for Disease Control and Prevention (CDC), the number of TBI-related hospital visits and deaths increased by 53% between 2006 and 2014. Unfortunately, patients who survive after a concussion often deal with neurological sequela for the rest of their lives. This article will explore the basic concepts of TBI as well as the role of stem cell therapy in restoring normal neurological function after irreversible damage.
How Do Concussions Happen?
The brain is a fragile organ that’s protected by a boney structure known as the skull. Unfortunately, this protection can be a double-edged sword. To prevent contact between the brain and the skull, a liquid called cerebrospinal fluid (CSF) acts as a shock absorber to avoid any trauma to the brain when the skull is abruptly moved. In other words, the brain is floating in the CSF to be able to easily move around when you change positions.
A concussion occurs when the brain collides with the skull at an intensity that surpasses the CSF-cushioning ability. Consequently, the brain will shrink on itself, sending shock waves through the entire tissue, which tear the neurons. This phenomenon is referred to as diffuse axonal injury. As a result, the interneural network responsible for every task that the brain completes is compromised and may lead to irreversible loss of function.
Stem Cell Therapy and Traumatic Brain Injury
Stem cells have the ability to differentiate into several body tissues, which makes them a candidate to treat and repair damage for a myriad of medical conditions, including traumatic brain injuries.
In a clinical trial, researchers used bone marrow-derived stem cells as repair agents to restore the function of damaged brain tissue after enduring TBI. Stem cells were introduced to patients using minimally-invasive procedures with highly-sensitive imaging guidance to deliver the cells at the exact site of tissue damage.
Researchers stated that “These stem cells secrete growth factors that have shown preclinical benefit and also recruit the patient’s own stem cells through various homing signals. Recent successes with similar stem cell therapy trials in other diseases, such as for heart attack recovery, have generated increased interest in now using these approaches to treat brain injury.”
Moreover, a 2018 study published by nature, scientists aimed to find out if certain types of cell therapy, such as umbilical cord stem cells and bone marrow-derived stem cells benefit patients with traumatic brain injuries. The researchers found that these cells can regenerate neurons and repair damage, which may revolutionize the field of traumatology since patients may restore certain neurological functions even after irreversible damage.
Note that the idea of using stem cell therapy to treat concussions is not new, as a 2002 experimental study on rats concluded that “We show for the first time that the IV administration of human umbilical cord blood cells reduces functional deficits after severe traumatic brain injury in the rat. The injected cells enter the brain, migrate into the injured area, and a few express the neuronal and astrocytic phenotypes and integrate into the vascular structures. Cord blood administration may be a useful treatment for traumatic brain injury.”
The use of stem cell therapy to manage symptoms of TBI are still in the experimental phases; however studies have shown its potential to restore lost functions with minimally-invasive procedures that carry an extremely safe side effect profile.
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Traumatic brain injury (TBI) encompasses a wide range of injuries, neurological problems, and outcomes. On one end of the spectrum is a concussion, which can be mild and short lasting. At the other end of the spectrum, traumatic brain injury can be lethal or leave patients with chronic mental and physical problems. Despite this range of severities, traumatic brain injury is one of the leading causes of disability in the United States, affecting over 13 million people. People who suffer from chronic symptoms related to traumatic brain injury may struggle with chronic seizures, memory problems, concentration problems, agitation, among others. TBI can have profoundly worsened a person’s quality of life and overall well-being.
Unfortunately, little can be done to treat traumatic brain injury directly. Aside from treating symptoms, the main treatment for TBI is to have the patient to rest and avoid stimulation in an effort to give the brain time to heal. Patients can regain some function through intensive work with physical, occupational, speech, and recreational therapist. However, the brain’s ability to heal itself is limited compared to other tissues of the body. In short, the brain has very little capacity to make new brain cells after we are born. So once TBI has occurred, patients either need to depend on other healthy areas of the brain or simply adapt to their circumstances.
Fortunately, researchers are finding ways to improve on nature through hyperbaric oxygen therapy. Drs. Shandley, Wolf and other hyperbaric medicine researchers recruited a group of 28 military veterans who sustained a traumatic brain injury in Iraq or Afghanistan. These individuals had ongoing cognitive problems as a result of their brain injuries. Researchers placed some study participants in 2.4 atm avoid hundred percent oxygen, while the others simply underwent a placebo experience at basically normal pressure and oxygen levels. The two groups underwent 30 exposures each and took a cognitive test before and after these treatments.
Hyperbaric oxygen therapy increased the number of stem cells in the blood of patients with TBI. In other words, hyperbaric oxygen treatment was able to move stem cells from the bone marrow and perhaps other tissues into the bloodstream. At the same time, those treated with hyperbaric oxygen performed better on tests of cognition including ImPACT, BrainCheckers, and PCL-M test. Moreover, no adverse effects of treatment were observed. Taken together, these results suggest 30 sessions of hyperbaric oxygen treatment at 2.4 atm was able to increase stem cells in the blood and improve cognition in US warfighters who suffered traumatic brain injury during combat. These results are encouraging news for the millions of veterans and nonveterans who sustained a traumatic brain injury every year.
Reference: Shandley, S. et al. (2017). Increased circulating stem cells and better cognitive performance in traumatic brain injury subjects following hyperbaric oxygen therapy. Undersea & Hyperbaric Medical Society. 2017 May-Jun;44(3):257-269.
Many US warfighters are left with traumatic brain injury (TBI) and/or posttraumatic stress disorder (PTSD) after suffering blast injury during battle. TBI is one of the leading causes of disability in the United States, and PTSD is rapidly becoming a leading cause of disability among US veterans. PTSD leaves sufferers with flashbacks, severe anxiety, sleep disturbances, mood disorders, and cognitive deficits. Traumatic brain injury, on the other hand, may cause a variety of mental and emotional problems. When these conditions occur in the same patient, it can have devastating effects on quality of life for the veteran’s remaining years.
The main treatment for traumatic brain injury is to simply allow the brain time to heal. Unfortunately, the brain is different than skin or other tissues of the body; it only has limited capacity to heal itself after an injury. The main treatment for PTSD is psychotherapy (talk therapy) and a rather nonspecific collection of medications including antidepressants and antipsychotic drugs. Unfortunately, people with both traumatic brain injury and PTSD are more difficult to treat, and generally, have poorer outcomes.
Researchers at the Veterans Administration studied the effects of hyperbaric oxygen therapy among military veterans with mild to moderate traumatic brain injury and PTSD. In a phase 1 clinical trial, veterans received 40 treatments of hyperbaric oxygen therapy lasting for 60 minutes each. Each treatment was 1.5 times atmospheric pressure or 50% more than they would experience under normal circumstances. Despite this modest dose of hyperbaric oxygen, the benefits to warfighters were remarkable.
After treatment, the veterans had substantial improvements in short-term memory, attention, concentration, and executive function. Shockingly, their IQ increased by nearly 15 points on average. They also enjoyed a substantial reduction in the frequency and severity of headaches. On average, they had a 30% reduction in PTSD symptoms. In fact, nearly 2/3 of trial participants were able to reduce the dose of or stop their PTSD medications.
Study participants also underwent special studies to examine the effects of hyperbaric oxygen therapy on brain tissue and blood flow. Patients treated with hyperbaric oxygen showed substantial increases in brain blood flow and marked increases in the volume of brain tissue. In other words, hyperbaric oxygen therapy was able to accelerate brain healing in this study.
This groundbreaking research has led to the use of hyperbaric oxygen therapy is a treatment for TBI and PTSD in other military personnel and also civilians. As additional clinical trials are published, the hope is that more health insurers, Medicare, and the VA will reimburse patients for this important treatment.
Traumatic brain injury (TBI) is one of the most common causes of disability in the United States, affecting over 13 million citizens. Traumatic brain injury is responsible for over 2 million emergency department visits, over a quarter of 1 million hospitalizations, and nearly 60,000 deaths each year.
Traumatic brain injury harms brain tissue in two phases. The first phase of injury occurs at the time of the traumatic incident. This initial injury may cause small or large areas of the brain to bleed. It may also shear (stretch/tear) nerve cells, making them dysfunctional. The second phase occurs hours or days after the initial injury. The brain is subjected to ongoing damage because of inflammation, cell death, and injury to blood vessels. Many people with TBI are left with lifelong problems with thinking, memory, and behavior.
In both of these phases of injury, one major way to help prevent long-term brain damage is by maintaining adequate blood flow to brain tissue. Unfortunately, once the damage has occurred, it can be a challenge to reverse the damage. Patients usually must endure months or years of physical and occupational therapy to regain what was lost. Moreover, patients often need substantial amounts of psychiatric and psychological support to treat mental health problems.
Fortunately, researchers are using hyperbaric oxygen therapy (HBOT) to improve blood flow to the brain in patients with traumatic brain injury. Hyperbaric oxygen therapy provides patients with pure oxygen (100%) at slightly higher pressures than they would experience normally. It is been used for hundreds of years to treat scuba divers who suffered “the bends” or decompression sickness; however, researchers are finding that hyperbaric oxygen therapy is a “coveted neurotherapeutic method for brain repair.”
To study the effects of hyperbaric oxygen therapy, researchers selected 10 people who had suffered mild traumatic brain injury in the previous 7 to 13 years. Patients all had brain damage that interfered with attention, memory, and thinking abilities.
Even though patients had sustained traumatic brain injury and brain damage a decade earlier, hyperbaric oxygen therapy was able to improve blood flow in the brain. Likewise, the amount of blood detected within the brain significantly increased, suggesting that hyperbaric oxygen therapy actually caused blood vessels in the brain to grow and multiply. Just as impressively, patients with chronic brain damage performed better on tests of cognition (i.e. thinking). They were able to process information more quickly, they had better motor function, and they were able to take in and process information about the world around them more efficiently.
Because people with traumatic brain damage have limited treatment options to improve their situations, these results are incredibly exciting. This was a study on 10 patients and more studies on larger numbers are still needed to build on these findings. Nonetheless, these results are quite encouraging for people with traumatic brain injury and their loved ones.