This article has been reviewed according to Science X's editorial process and policies. Editors have highlighted the following attributes while ensuring the content's credibility:

fact-checked

trusted source

proofread

Biolab replaces horseradish roots for production of important enzymes

Biolab replaces horseradish roots
The biolab at TU Wien. Credit: TU Wien

It is one of the most important enzymes in medical diagnostics: Horseradish peroxidase is used for many medical products—it is often used when a color change of a test strip is to detect the presence of antibodies or other proteins.

Recently, however, there has been a shortage of peroxidase, because it is obtained from horseradish roots, and this has major disadvantages: The agricultural yield is not always the same, the roots produce not just one version of the enzyme, but a whole family of similar enzymes, in varying amounts.

For this reason, scientists at TU Wien decided to develop a reliable, precise synthesis method in the laboratory. After years of research, they have now succeeded: The production of horseradish peroxidase is now possible with the help of E. coli bacteria. Only one specific enzyme is produced in a precisely reproducible manner, and the process can be scaled up to large-scale . Having already applied for two patents, TU Wien is now looking for industrial partners.

Unpredictable vegetables

"When you extract horseradish peroxidase from plants, you don't get a chemically well-defined substance," says Prof. Oliver Spadiut from the Institute of Chemical, Environmental and Bioscience Engineering at TU Wien. "Depending on the environmental conditions, the plant produces different amounts of different enzymes." For certain , such substances cannot be used at all—for example, it would be absolutely irresponsible to inject such a mixture of different enzymes into a human being.

In medical diagnostics, the rules are less strict, and horseradish peroxidase is used for western blots or ELISAs. In these techniques, certain antibodies are coupled to the enzyme. The antibody docks onto a specific molecule, and the enzyme then initiates a . In this way, the presence of certain molecules can be made visible.

"We are currently experiencing shortages of this enzyme worldwide," says Spadiut. "One of the reasons for that is climate change and poor harvests. When change, the plant also changes the composition of the enzymes produced in ways that are difficult to predict." At the same time, however, global demand is increasing: the market volume for horseradish peroxidase trade is estimated to reach more than 90 million euros per year in the next few years.

Biolab replaces horseradish roots
Horseradish: the usual source of the valuable chemical. Credit: TU Wien

A bacterium to the rescue

Oliver Spadiut and his team therefore set out to develop a recombinant production process for the valuable enzyme. The gene for the production of horseradish peroxidase was inserted in the laboratory into , mammalian cells and E. coli cells. All three hosts actually produced the desired enzyme, but the best technical solution proved to be the use of E. coli—a well-known bacterium that has also been used in biotechnology with great success many times before.

However, this does not directly yield a functional enzyme, but rather a so-called ""—a protein that is biochemically identical to the desired , but is geometrically folded differently. In a further step, therefore, the inclusion body must be unraveled and then folded into the correct shape, similar to unwinding a ball of wool and then rolling it up into a well-ordered ball.

Especially in this field of research, the processing of inclusion bodies, Spadiut's team has a lot of experience—and so, for the first time ever, TU Wien succeeded in developing a reliable, reproducible process for the production of horseradish peroxidase. Patents have already been filed, and the process is ready. "We could start applying the method on an industrial scale tomorrow," says Spadiut. "We don't just have a theoretical concept here, but a proven method that is ready for industrial application."

Next step: Cancer therapy?

Now that it has been possible to produce horseradish peroxidase in a precisely defined, highly pure manner, this means that completely new applications beyond diagnostics are now conceivable. "For example, one could now also use horseradish peroxidase for by coupling it to antibodies, which then dock very specifically to cancer cells," says Spadiut.

"We therefore expect that the market volume of horseradish could even increase dramatically with many new applications." He now wants to hold talks with interested pharmaceutical companies in order to initiate the technological application of the new invention as quickly as possible.

Citation: Biolab replaces horseradish roots for production of important enzymes (2023, June 22) retrieved 7 March 2024 from https://phys.org/news/2023-06-biolab-horseradish-roots-production-important.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.

Explore further

Researchers develop 'cytological ruler' to build 3-D map of human genome

30 shares

Feedback to editors