Mon, May 29, 2017 | updated 12:05 AM IST

Drug found to treat rare genetic disorder

Updated: Aug 31, 2016 17:44 IST      
Drug found to treat rare genetic disorder

WashingtonD.C.[USA], Aug. 31 (ANI): In a recent study researchers have discovered a type of drug delivery system that may offer new hope for patients with a rare, ultimately fatal genetic disorder Niemann Pick Type C1 and make what might become a terrible choice a little easier.

No treatment currently exists for this disease that affects about one in every 120,000 children globally, and results in abnormal cholesterol accumulation, progressive neurodegeneration and eventual death.

However, a compound that shows promise is now undergoing clinical trials, but it has major drawbacks, the high doses necessary also cause significant hearing loss and lung damage, as well as requiring direct brain injection.

New findings outline the potential for a nanotech-based delivery system to carry the new drug into cells far more effectively, improve its efficacy by about five times, and allow use of much lower doses that may still help treat this condition without causing such severe hearing loss.

The same system may ultimately show similar benefits for 50 or more other genetic disorders, especially those that require "brain targeting" of treatments.

Professor Gaurav Sahay said, "Right now there's nothing that can be done for patients with this disease, and the median survival time is 20 years."

Adding, "The new cholesterol-scavenging drug proposed to treat this disorder, called cyclodextrin or HPßCD, may for the first time offer a real treatment. But it can cause significant hearing loss and requires multiple injections directly into the brain, which can be very traumatic. I'm very excited about the potential of our new drug delivery system to address these problems."

The HPßCD drug is attached to an extraordinarily small, nanotech-sized lipid particle that can carry it into cells, where it helps to flush out cholesterol.

However, researchers were surprised to discover that the carrier itself also helped address the problem, while working in synergy with the drug it carries to greatly increase its effectiveness.

This should allow use of much lower dosages and possibly an easier delivery through intravenous injection, instead of brain injection.

In the form currently used, only 0.2 percent of the drug is able to cross the blood brain barrier.

In previous research with the HPßCD drug in animal models, the treatment did slow the progression of this disease, but did not reverse it. The disease focuses its damage on liver and brain cells.

In their report, researchers noted that this type of drug delivery system has several advantages, including prolonged circulation times, the ability to incorporate multiple drugs with different mechanisms of action, and a variety of "targeting ligands" that can help cross the blood brain barrier.

The research was published in Scientific Reports. (ANI)

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Higher BMI can cause cardiovascular problems for youngsters

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Updated: May 27, 2017 16:56 IST     

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Suicide rates among people with autism on rise

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