Dr Clarence Moore Discusses the Importance of Stem Cell Therapy, Heart Health in Beta Thalassemia
Tags: Beta, Heart, Health, Therapy, STEM

How has the emergence of stem cell therapy changed the lives of people with beta thalassemia?

Stem cell therapy is offering a cure. So, with us really looking at stem cell therapy, with the more and more work [being done], we’ll be able to see that these individuals will no longer have to experience this lifelong disease, and they could potentially be cured.

What is the importance of heart health for patients, especially those with beta thalassemia major?

Heart health is very important. When you look at one of the largest comorbidities that is associated with [beta thalassemia], it is heart health. You can see some cardiomyopathy develop. So, maintaining heart health is very important in decreasing the morbidity and mortality associated with the disease state.

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What is the importance conducting blood tests to determine beta thalassemia types in young children?

I think that it’s very important. Knowing upfront what disease or what type of beta thalassemia that these individuals may have is going to be vital for us to manage it. And if we’re able to potentially manage that at the earlier stage, we could potentially have better outcomes in the future.

A recent study from Japan describes a previously unknown mechanism for pain control involving a newly identified group of cells in the spinal cord, offering a potential target for enhancing the therapeutic effect of drugs for pain.

While neurons may be the most well-known cells of the central nervous system, an assortment of non-neuronal cells first discovered in the mid-nineteenth century also play a wide variety of important roles. These glial cells are are critical elements for regulating neuronal development and function in the central nervous system.

Among the different types of glial cells, astrocytes are the most abundant in the central nervous system, but, unlike neurons in different brain regions, researchers still have yet to develop a detailed understanding of groupings of astrocytes with distinct properties.

In the animal study, researchers led by Makoto Tsuda, professor at Kyushu University’s Graduate School of Pharmaceutical Sciences, said they discovered a population of spinal cord astrocytes with a role in producing pain hypersensitivity.

Found in the outer 2 layers of gray matter near the back of the spinal cord, known as the superficial laminae of the spinal dorsal horn, the astrocytes are in a region known to carry general sensory information such as pressure, pain, and heat from around the body to the brain.

Using mice, the researchers showed that stimulating noradrenergic (NAergic) neurons (so-called for their use of noradrenaline as a neurotransmitter) that carry signals from the locus coeruleus (LC) in the brain down to the spinal dorsal horn activates the astrocytes and that the astrocyte activation results in pain hypersensitivity.

These observations counter the view hat descending LC-NAergic neurons suppress pain transmission in the spinal dorsal horn.

“The discovery of this new population of astrocytes reveals a new role of descending LC-NAergic neurons in facilitating spinal pain transmission,” said Tsuda in a statement.

Considering these findings, suppressing signaling of these astrocytes by noradrenaline may enhance the effect of drugs for chronic pain.

To initially test this, the researchers genetically engineered mice in which response of astrocytes to noradrenaline was selectively inhibited and gave them duloxetine, an analgesic drug thought to increase levels of noradrenaline in the spinal cord by preventing uptake by descending LC-NAergic neurons.

Indeed, the modified mice exhibited an enhanced easing of chronic pain by duloxetine, further supporting the researchers’ proposed role of the astrocytes.

“Although we still need more studies with different drugs, this astrocyte population appears to be a very promising target for enhancing the therapeutic potential of drugs for chronic pain,” said Tsuda.