People with heart failure may have trouble breathing, walking, and having a normal life. Current treatments for heart failure are aimed at making the healthy heart tissue pump harder (e.g. digoxin). On the other hand, treatments largely ignore dead heart tissue because there A myocardial infarction, better known as a heart attack, occurs when blood flow through the coronary arteries to the heart is blocked. This usually occurs when a blood clot forms in a coronary artery. Since the heart is a highly active muscle, it requires a constant supply of oxygen and nutrients to maintain its pumping function. When the heart muscle is starved of oxygen, as is the case during myocardial infarction, heart cells become dysfunctional. If blood flow through the coronary arteries (which carries oxygen to the heart) is not restored soon after a heart attack begins, those dysfunctional heart cells will die.
When heart tissue has been destroyed by a heart attack, patients are usually left with poor heart function. This can lead to congestive heart failure. One way to determine whether someone who has had a heart attack has suffered lasting heart damage is to perform an echocardiogram, or simply an “echo.” By performing an echo, doctors can estimate the heart’s ability to pump blood by measuring left ventricular function.
has been no known way to rescue it. With the discovery and use of stem cells, however, there is a chance that scientists may be able to rescue dead heart muscle and improve cardiac function.
In a study, researchers blocked the coronary arteries of experimental animals to cause myocardial infarction. Four weeks later, they injected either bone marrow-derived stem cells or adipose-tissue-derived stem cells into the heart. Impressively, blood flow significantly improved to the heart and heart function. Treated animals had substantially higher left ventricular ejection fraction, essentially reversing heart failure a full month after a heart attack. Shockingly, the researchers found that stem cells appeared to salvage dead heart tissue, meaning that the size of the damaged area was smaller after treatment.
While these incredible results will need to be replicated in humans, this research represents an exciting breakthrough in cardiology and regenerative medicine. The stem cell approach may be able to help patients who have had a heart attack, but could not get medical treatment in time to remove the clot.
The application of stem cells to treat health disorders, diseases, and injuries has been rapidly expanding in recent years. The breadth of their application comes from the fact that stem cells are undifferentiated and can, therefore, differentiate into all sorts of cells with different specialized functions and therefore have an enormous number of potential ways that they can improve health. A review published in Frontiers in Physiology covers the way stem cells can be used for therapy of oral diseases.
According to the authors of the article, adult stem cells and induced pluripotent stem cells are the best types of stem cells to use to treat oral and maxillofacial defects. There are pros and cons associated with adult stem cells, including both autologous and allogeneic stem cells, as well as with induced pluripotent stem cells. For instance, whereas autologous stem cells can modulate the immune system, allogeneic stem cells appear helpful for malignant diseases, and induced pluripotent stem cells are unlimited in terms of their source and do not involve any ethical issues.
There are a number of potential sources for treating oral disease, including tooth germ progenitor cells, dental follicle stem cells, salivary gland stem cells, stem cells of the apical papilla, dental pulp stem cells, inflamed periapical progenitor cells, among others. While adults stem cells can differentiate directly into specialized cells or can be turned into induced pluripotent stem cells, induced pluripotent stem cells can be driven to differentiate into specialized cells.
Clinical trials have been undertaken to study the ways in which stem cells can address a number of oral diseases, including bone diseases, dental pulp diseases, eye diseases, facial diseases, and periodontal diseases, as well as tooth extraction. The strategies for treating oral disease with stem cells involve sorting and expanding the stem cells outside of the body, mixing them with materials and factors that help them grow, and implanting them into the impaired region.
Future research will help to delineate the different ways in which certain types of stem cells can best be used to address individual oral diseases. Studies will also help to uncover the specific types of stem cells that are best for specific diseases and the protocols that should be used to reap the greatest benefits for patients.
Patients usually recover from bone fractures with the right treatment, but sometimes the bone fails to heal because new tissue does not form and connect the broken pieces properly. Delayed union refers to cases where the bone takes longer than usual to heal, and nonunion refers to cases where the bone does not heal. In approximately 5 to 10 percent of cases of a fractured bone, delayed union or nonunion occurs. These conditions are associated with long-term pain and discomfort, and though can be addressed through surgical treatments, these interventions do not always lead to long-term healing.
In recent years, researchers have begun exploring the potential for mesenchymal stem cells to help address these important challenges of delayed union and nonunion. A review of the potential for these stem cells to help in these cases where fractures do not properly heal was recently published in the Journal of Biomedical Materials Research.
Mesenchymal stem cells are helpful in bone healing because they differentiate well and can differentiate into different cell lineages that are all important for bone formation, growth, and maintenance. These cell types include chondrocytes, osteoblasts, myoblasts, and adipocytes.
According to the authors of the review, mesenchymal stem cells can be used in conjunction with extracellular matrix scaffolds and biological adjuvants that promote growth, differentiation, and blood vessel formation, to help in the bone healing process when the delayed union or nonunion occurs. Future research will help to determine the best ways that mesenchymal stem cells can be used in combination with bioengineering strategies to help patients whose bone fractures do not heal or do not heal properly.
Multipotent stem cells have the ability to turn into a number of different cells in the body, making them one of the most versatile solutions in regenerative medicine. They are also characterized by their capacity for self-renewal. Here, we take a look at their current applications, as well as their benefits.
What Makes Multipotent Stem Cells Unique?
To understand the distinguishing features of multipotent stem cells, we must first look at the different types of stem cells. There are three main classifications for the varying degrees of stem cell flexibility:
Totipotent: These cells can turn into any cell in the body and are only found within the first couple of cell divisions following the fertilization of a female egg by a male sperm.
Pluripotent: During embryonic development, totipotent cells specialize into pluripotent cells. They can give rise to all cells in the human body but aren’t quite as flexible as totipotent cells.
Multipotent: Finally, pluripotent stem cells specialize into multipotent stem cells, which have been found in cord blood, cord tissue, adipose tissue, cardiac cells, bone marrow, and mesenchymal stem cells (MSCs).
What Are Multipotent Stem Cells Used for?
Not only are multipotent stem cells able to renew themselves almost indefinitely, their ability to become any other cell makes them a powerful agent in treating patients with tissue damage. From knees to other joints and even the gastrointestinal tract, there are many sites in the body where compromised tissue can benefit tremendously from stem cells. They can even help arthritis sufferers and individuals with tendonitis. Because stem cells can also replenish dying or damaged tissue of specialized cell types, multipotent stem cells can also benefit individuals with chronic illnesses such as COPD, multiple sclerosis (MS), and Parkinson’s disease.
What Are the Benefits of Multipotent Stem Cells?
Multipotent stem cells are advantageous because they can be sourced from a number of locations, including the Wharton’s Jelly which lines umbilical cord vessels, as well as fat tissue (adipose stem cells) and bone marrow aspirate. These cells can then be delivered via non-invasive regenerative therapy to replace damaged cells with new ones, which have the ability to help increase energy and control symptoms in chronic conditions. The treatment can also potentially spur healthy tissue development in musculoskeletal injuries, and when injected directly into the joint, it has the potential to promote healing of ligaments, tendons, and cartilage to help return functionality and in some cases could delay the need for joint replacement.
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.
Crohn’s disease is a chronic inflammatory bowel disease that has no cure. It causes abdominal pain, frequent diarrhea, weight loss, fatigue, and anemia. While the disease can be controlled to some degree through oral and injectable medications, life-threatening complications may occur.
One of the feared complications of Crohn’s disease is called a bowel fistula. A fistula is an abnormal connection between two places on the body. In Crohn’s disease, a fistula forms between the intestine and some other structure—the intestine essentially forms a “tunnel.” The fistula can form between one loop of intestine and another, between intestine and bladder, or even between the intestine and the outside of the body. This complication of Crohn’s disease is obviously quite distressing to patients.
Some bowel fistulas may close on their own with conservative treatments, but fistulas associated with Crohn’s disease do not respond well to available medical treatments. Those looking for an alternative treatment may be able to consider stem cell therapy.
Stem cells offer an interesting potential solution to this problem. Stem cells can provide a large dose of normal cells filled with molecules that can help direct normal bowel growth and development. Indeed, researchers have shown that autologous mesenchymal stem cells can help close and heal fistulas in patients with Crohn’s disease.
In phase I, II, and IIB clinical trials, stem cells derived from adipose tissue or bone marrow were directly infused into the bowel area (via a so-called intra-fistular injection). Across five clinical studies including over 100 patients, stem cell administration resulted in complete fistula healing in 50 to 80% of patients treated. Of those who did not obtain complete control fistula closure, almost all had evidence of improvement. These results support that autologous mesenchymal stem cell therapy is a promising future treatment for patients with Crohn’s disease and may offer patients enjoy a better quality of life.
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