Handling diabetes is a daily struggle for many. It can require near constant forethought about when and what a person will eat during the day, if and how much insulin the meals will require, innumerable finger pricks to check glucose levels and the added inconvenience of constantly carrying around insulin pumps and testers, extra batteries and everything else they will need to get through the day.
Diabetics may have to self-administer insulin shots like this three times a day.
Diabetes refers to a family of diseases where the body is unable to effectively produce or use insulin, the hormone required to convert food into energy. The cause of diabetes is not known, and so far, there is no cure. Diabetes is the seventh leading cause of death in the United States today.
According to the American Diabetes Association, "there are 23.6 million children and adults in the United States, or 7.8% of the population, who have diabetes. While an estimated 17.9 million have been diagnosed with diabetes, unfortunately, 5.7 million people (or nearly one quarter) are unaware that they have the disease."
There are three main types of diabetes:
Type 1 Diabetes is characterized by the bodys inability to produce insulin and therefore necessitates daily injections of insulin. Because it most often develops in children, it is often referred to as "juvenile diabetes." The Juvenile Diabetes Research Foundation (JDRF) reports that as many as three million Americans may have type 1 diabetes (T1D) and an average of 40 children each day (more than 15,000 per year) are diagnosed.
Stabilizing insulin levels is the key to managing diabetes. The standard treatment today focusses on supplementing the bodys insulin, typically through injection (needles) or insulin pumps, which are worn outside the body. This requires the patient testing his or her blood sugar levels several times per day and carefully maintaining blood insulin levels. While this is recognized as the best standard of care currently, researchers hope to find a way to help the body produce or better regulate its own insulin levels.
One such method being researched uses stem cells to create the insulin-producing islets in the pancreas. While stem cell therapy has yet to cure type 1 diabetes, there are documented cases where patients have gone years without needing insulin injections. Some clinical trials are using cord blood stem cells specifically to treat diabetes.
In 2017, researches gathered and analyzed 13 studies published between 2006 and 2016 comprising 342 patients who received stem cells like those abundant in cord blood and another 111 who received stem cells like those abundant in cord tissue to treat their diabetes. While not everyone responded to the treatment, researchers observed improved glucose control and reduced dependence on insulin lasting up to four years. While the results showed promise for the treatment of diabetes using stem cells, it still left a few questions unanswered including who were the ideal candidates, what was the best route of administration, what was the optimal dose and was there a need for multiple transfusions.
A clinical trial conducted in Brazil comprising 21 adult patients with type 1 diabetes shows that a stem cell infusion may remedy the disease, at least for a number of years. Published during 2017 in the journal Frontiers in Immunology, the results showed that most patients became insulin-free for three and a half years and one patient did not have to use insulin for eight years. We now understand stem cell transplants can succeed in treating diabetes for some, said Bart Roep, Ph.D., the Chan Soon-Shiong Shapiro Distinguished Chair in Diabetes, professor/founding chair of the Department of Diabetes Immunology and monitor of the clinical trial.
These positive outcomes were not the rule. For some patients, the stem cell transplant had little to no effect on their type 1 diabetes (T1D).
Bart Roep, Ph.D.
We discovered the immune signature predicting these outcomeseither favorable or notwhich is the first step toward personalized medicine in type 1 diabetes, said Dr. Roep. Understanding why it sometimes fails will allow us to design new treatment strategies for those less fortunate patients. Also, it is the first definitive proof that T1D can be cured.
In the study, the type 1 diabetes patients lasted up to 30 months after infusion without insulin; however, after that point in time, the benefits started to decrease and most of the long-lasting insulin-free patients eventually resumed insulin. This indicated that additional mechanisms may be at play or that genetic background may still have an influence. To counter this effect, T-regulatory cells (Tregs) were infused. In short-term follow-ups, infusions of Tregs decreased insulin requirements in six out of eight patients, two of which became insulin-free.
The stem cells in this study were autologous hematopoietic stem cells. They are the same type of stem cells found in umbilical cord blood. Because type 1 diabetes (often referred to as juvenile diabetes) is an auto-immune disease that shows up early in life, it is easy to see where the outcome of this study could prove beneficial to people whose cord blood was stored at birth. Cord blood is the best source of these hematopoietic stem cells because of their navet and lack of any mutations caused by ageing.
The results of this study follow a recent conclusion by the same researchers that type 1 diabetes was not caused by immune system mistakenly attacking insulin-creating beta cells but rather caused by distressed beta cells themselves effecting the immune response.
Researchers at the University of Florida Health say they have found a way to expand certain preserved cord blood cells that could potentially serve as a long-term treatment for type 1 diabetes. The cells are called thymic regulatory T cells, or tTregs for short. They are a type of white blood cell that helps prevent autoimmune responses, which is when a persons immune system attacks him- or herself, such as in diabetes.
Using microbeads that activate and stimulate growth, scientists were able to culture 1.26 billion tTreg cells from a harvest of 250,000500,000 umbilical cord tTregs. Having the ability to propagate these tTreg cells could be a step toward stopping the disease because it allows doctors to do the following: (1) replenish low tTreg counts caught early in life, (2) replace bad tTregs with a fresh supply of new, good tTregs and (3) renew treatments as or if insulin-dependency returns.
The results of this study are also another step toward being able to harvest part of a cryo-preserved cord blood collection for multiple treatment opportunities.
The Stem Cell Educator device is said to re-educate immune system cells
A newly developed Stem Cell Educator (SCE) uses a novel cell identified by Dr. Yong Zhao as having embryonic and hematopoietic characteristics. Dr. Zhao says these cord bloodstem cells (CBSC) can be used to re-educated lymphocytes and stop autoimmune responses. The Educator circulates a patients blood through a closed-loop system that separates mononuclear cells from the whole blood, briefly co-cultures them with adherent cord bloodstem cells and returns the re-educated cells to the patients circulation. The Stem Cell Educator does not introduce new stem cells into patients in comparison with other stem cellbased therapies. In addition, in prior trials, Dr. Zhao says the educator eliminates the need for prior matching and a treatment take as few as 810 hours.
A study out of Australia is recruiting children between the ages of 1 and 12 to see if a re-infusion of their own cord blood can help prevent type I diabetes in those who are at an enhanced risk.
The Institute of Metabolism and Endocrinology in China has a pair of studies looking at Treg cells from cord blood for diabetes.
A study on the Stem Cell Educator is currently in trial in China.
Another three different studies in China are using cord tissue stem cells for patients with diabetes.
A clinical trial in Vietnam is also looking at how cord tissue stem cells can treat the condition.
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