Cyclic weapon against Multiple Sclerosis

Flower of Oldenlandia-affinis; image credit: David Wilson
11 April 2016

Published in PNAS: An international study involving the University of Queensland researchers has demonstrated that a new plant-derived drug can block the progression of multiple sclerosis (MS).

The new drug T20K is based on a compound present in the traditional medicinal plant Oldenlandia affinis, and has been successful in an animal model of MS.

The drug belongs to a new class of synthesised peptides called cyclotides. They are present in a range of common plants, and are considered ideal 'template' molecules for a variety of new drugs.

The medicinal potential of cyclotides has long been known. Thus African women have traditionally used a tea made from Oldenlandia-affinis to induce labor and facilitate childbirth. The active ingredient was later determined as the cyclotide kalata B1.

In general they are biologically very stable compounds. Therefore it is expected that patients will be able to take T20K orally.

This would be a significant advantage over existing treatments, which require frequent injections.

Image shows the structure of a cyclotide, here kalata B1 derived from Oldenlandia affinis. Image source: wikipedia

According to Dr Christian Gruber, who is affiliated with both the Medical University of Vienna and the University of Queensland, Phase I clinical trials could begin as early as 2018.

The drug has been licenced to start-up company Cyxone - a Swedish company founded in 2015 to develop cyclotide drugs for autimmune and other diseases.

Story is based on a media release by the University of Queensland