Bacteria used as factories to produce cancer drugs

Researchers at the Novo Nordisk Foundation Center for Biosustainability in Denmark have developed a method of producing P450 enzymes - used by plants to defend against predators and microbes - in bacterial cell factories. The process could facilitate the production of large quantities of the enzymes, which are also involved in the biosynthesis of active ingredients of cancer drugs.

P450 is the name of a type of cytochrome, a specialised enzyme. These are used by plants to synthesise chemical compounds with many different functions, but their main use is in defending against herbivores, insects and microbes.

"These powerful compounds can be used as active ingredients in drugs for treating diseases such as cancer and psoriasis," SINC was told by the Spanish researcher Darío Vázquez-Albacete, the lead author of a paper describing a new method of producing the enzymes in bacterial cell factories.

The findings of the study, developed at the Novo Nordisk Foundation Center for Biosustainability, a research facility managed by the Technical University of Denmark, were published in the journal Biotechnology and Bioengineering.

According to Vázquez-Albacete, "the new technique is a significant step forward, as plants produce P450 enzymes in very small amounts, extraction is very complex and sometimes we have to use polluting chemical synthesis processes which involve the use of oil derivatives. Additionally, some plant species such as the yew (Taxus baccata), from which the cancer drug Taxol is obtained, are endangered species."

Large-scale production
"We have developed tools which will allow the proteins from plants that produce these compounds to be recognized by the bacterial molecular machinery. The aim is to use bacteria because they arecapable of growing rapidly in controlled fermenters, allowing us to produce large quantities of the enzymes," says the researcher.

To achieve these results, the researchers modified and transferred P450 genes from plants to E. Coli bacteria and to check whether the microbes could produce larger quantities of these enzymes than existing methods.

Vázquez-Albacete says that "in order for the bacteria to properly express the enzymes, the corresponding DNA sequence must frequently be modified to facilitate 'decoding' by the bacteria's system."

In the study, the team developed a toolbox of 'auxiliary' DNA sequences, allowing them to express around 50 P450 enzymes from different plants in E. coli.

Some of these enzymes are involved in synthesising the natural compound ingenol, which is used to treat psoriasis and is currently manufactured using traditional chemical techniques. Other P450s are used to produce the cancer drug Taxol.

The researcher stresses that plants generate a variety of interesting compounds to protect them from the sun and from predators, dehydration, etc. "Many of these are synthesised by P450s, whose function is still very little understood, so there is enormous potential to discover new compounds."

Besides the Novo Nordisk Foundation team, a handful of other groups are already following this line of research. Pharmaceutical firms have already displayed interest in the new technique.

Vazquez-Albacete D, Cavaleiro AM, Christensen U, Seppälä S, Møller BL, Nørholm MH.
An expression tag toolbox for microbial production of membrane bound plant cytochromes P450.
Biotechnol Bioeng. 2017 Apr;114(4):751-760. doi: 10.1002/bit.26203.

Most Popular Now

Sanofi to acquire Ablynx for €3.9 Billion

Sanofi and Ablynx, a biopharmaceutical company engaged in the discovery and development of Nanobodies®, entered into a definitive agreement under which Sanofi will offer ...

Repurposed drug found to be effective against Zika…

In both cell cultures and mouse models, a drug used to treat Hepatitis C effectively protected and rescued neural cells infected by the Zika virus - and blocked transmiss...

More stroke patients may receive crucial treatment…

More patients could be eligible for critical treatments to remove or dissolve blood clots that cause strokes, according to a new treatment guideline issued by the America...

In wine, there's health: Low levels of alcohol goo…

While a couple of glasses of wine can help clear the mind after a busy day, new research shows that it may actually help clean the mind as well. The new study, which appe...

Drug trial protocol redactions by industry sponsor…

New research published by the Journal of the Royal Society of Medicine exposes the extent of redactions in protocols for industry-sponsored randomised drug trials. Trial ...

Advanced Accelerator Applications receives FDA ap…

Novartis AG (NYSE: NVS) announced that Advanced Accelerator Applications, a subsidiary of Novartis Groupe S.A., has received US Food and Drug Administration (FDA) approva...

Interim publications of randomized trials make new…

Early results from randomized trials are sometimes published before the trial is completed. The results of such interim publications may generate a great deal of interest...

Blood vessel-on-a-chips show anti-cancer drug effe…

Researchers at the Institute of Industrial Science (IIS), the University of Tokyo, CNRS and INSERM, report a new organ-on-a-chip technology for the study of blood vessel ...

FDA approves new treatment for certain digestive t…

The U.S. Food and Drug Administration today approved Lutathera (lutetium Lu 177 dotatate) for the treatment of a type of cancer that affects the pancreas or gastrointesti...

Roche reports good results in 2017

In 2017, Group sales rose 5% to CHF 53.3 billion. Core operating profit grew 3% and Core EPS increased 5%, reflecting the good underlying business performance. On an IFRS...

Cells of 3 advanced cancers die with drug-like com…

Researchers at Southern Methodist University have discovered three drug-like compounds that successfully reverse chemotherapy failure in three of the most commonly aggres...

Pfizer announces positive top-line results for pot…

Pfizer Inc. has announced that REFLECTIONS B3281006, a comparative safety and efficacy study of PF-05280586 versus MabThera® (rituximab-EU), met its primary endpoint. PF-...

Pharmaceutical Companies

[ A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Z ]