Europe South Asia Asia Pacific Americas Middle East Africa BBC Homepage World Service Education

Front Page



UK Politics







Talking Point

In Depth

On Air

Low Graphics

Tuesday, August 24, 1999 Published at 15:27 GMT 16:27 UK


Modified cows could fight MS

The work would be done in Friesian cows

A human gene could be introduced into cows in an attempt to find a new treatment for multiple sclerosis, a disease that affects the nervous system.

Scientists believe the disease is caused by a breakdown in the protein which coats the nerves in the brain and spinal cord.

Researchers in New Zealand hope that by introducing the human gene that codes for this protein into cows they can make the animals produce the chemical in their milk.

This could then be extracted and purified and used in an experimental treatment for MS sufferers.

Complex cells

AgResearch said it had applied to New Zealand's Environmental Risk Management Authority (ERMA) for permission to undertake a series of experiments on transgenic cattle.

The authority is responsible for compliance with biosecurity and other environmental safety regulations.

Modifying the genetics of farm animals so that they express medically-useful chemicals in their milk has been labelled "pharming". Although bacteria have long been used to make human drugs, there are some complex proteins that can only be produced in the more sophisticated cells of larger organisms.

Cows have an extra advantage in that a single animal can produce 10,000 litres of milk a year. Even at low concentrations, the potential yield of a pharmaceutical is very high.

Small herd

AgResearch is interested in myelin basic protein (MBP). It is thought the patchy degeneration of the myelin sheath that coats nerves in the brain and spinal cord is involved in the development of MS.

"In animals showing clinical signs of the disease, recovery can be helped by ingestion of myelin basic protein," AgResearch scientist Dr Phil L'Huillier said in a statement.

If the MBP from genetically-modified milk proved useful, it could potentially prove to be a breakthrough, he said. AgResearch's proposal involves the production of a small herd of up to 30 cattle for the project, at a secure containment site in the Waikato region of New Zeland.

The application goes before ERMA on Wednesday. Earlier this year, it approved an application from the developers of Dolly the cloned sheep, PPL Therapeutics.

The proposal was to breed a flock of sheep in New Zealand incorporating another human gene that will hopefully lead to a drug capable of treating the lung tissue disease cystic fibrosis.

Advanced options | Search tips

Back to top | BBC News Home | BBC Homepage | ©

Sci/Tech Contents

Relevant Stories

24 Aug 99 | Sci/Tech
Cloned animals could save burns victims

24 Aug 99 | Sci/Tech
GM plants to produce medicinal honey

26 Apr 99 | Sci/Tech
Scientists clone a goat

24 Aug 99 | Sci/Tech
Drugs giants unite for medical revolution

19 Dec 97 | Sci/Tech
First there was Dolly...

Internet Links

New Zealand Biotechnology Association


Environmental Risk Management Authority

The BBC is not responsible for the content of external internet sites.

In this section

World's smallest transistor

Scientists join forces to study Arctic ozone

Mathematicians crack big puzzle

From Business
The growing threat of internet fraud

Who watches the pilots?

From Health
Cold 'cure' comes one step closer