Sugar-Free Organs For Transplant

December 04, 1997

Organ transplantation is now highly successful, offering improved quality of like to thousands around the world each year. However, this success has given transplant surgeons a problem - more people are now able to benefit from a transplant but fewer donated organs are available. At the British Society for Immunology Annual Congress in Brighton this week Dr Mauro Sandrin will explain how immunologists at the Austin Research Institute in Melbourne, Australia are attempting to close the supply-demand gap using genetically modified pigs.

The major technical problem which needs to be overcome when attempting to transplant organs from pigs to humans is that of hyperacute rejection. The recipient's body immediately detects that the new organ is foreign and attacks it, turning it into a black, lifeless lump within minutes.

Dr Sandrin and his group have adopted a two pronged strategy to overcome hyperacute rejection, both arms of which involve removing sugars from the surface of pigs' cells.

Dr Sandrin has identified the trigger of hyperacute rejection. This is a sugar called GAL, which is found on the surface of all pig cells. So the Australian team are trying to produce a pig which doesn't make GAL.

The second prong of the attack is to try to develop a pig which has O type blood. Blood type is determined by sugars on the surface of red blood cells. If A, B or AB blood is given to someone incompatible a harmful immune response is triggered. However, O type blood carries no sugars and so is the universal donor.

Eventually Dr Sandrin and his colleagues would like to produce a pig with both sugars deleted - one with O type blood and no GAL. Organs from such a pig should be suitable for transplantation into any recipient.

The Australian team is attempting to tackle hyperacute rejection from its origin by removing the trigger. This contrasts with the approach of British and American scientists who have been trying to intervene at the next stage by halting the process of rejection once it has started. Dr Sandrin thinks that ultimately it may be advantageous to combine both approaches.

Dr Sandrin hopes that using his approach, pig-to-human transplants could become a reality within the next five years.

1. This strategy differs from the approach of some British and American scientists who are developing donor pigs by adding human genes.

2. Dr Sandrin will be speaking in the Transplantation Biology session on Thursday 4 December. The BSI 5th Annual Congress will be at the Brighton Centre, Brighton, UK from 2-5 December.

3. Dr Sandrin can be contacted at the Austin Research Insitute, Studley Road, Heidelberg, Victoria 3084, Australia. Tel: +61 3 9287 0666 Fax: +61 3 9287 0600

4. There will be a press office at the meeting in operation from 9am on Tuesday 2 December. Tel: +44 1 273 724 320 / 0378 406 416. Journalists are welcome to attend but are asked to contact Kirstie Urquhart in advance to register. 5. Before the meeting Kirstie can be contacted on +44 181 875 2402 /

British Society For Immunology

Related Transplantation Articles from Brightsurf:

A revolutionary new treatment alternative to corneal transplantation
A new approach in ophthalmology that offers a revolutionary alternative to corneal transplantation has just been developed by researchers and clinicians in North America, Europe, and Oceania.

Fewer complications after organ transplantation
A large international study coordinated by University Hospital Regensburg and Charité - Universitätsmedizin Berlin has demonstrated the safety of new cell therapy approaches for use in kidney transplant recipients.

Elderly patients also benefit from kidney transplantation
So far, kidney transplantation has generally not been offered to elderly patients (>75 years) because of the perioperative risks.

New material will allow abandoning bone marrow transplantation
Scientists from the National University of Science and Technology 'MISIS' developed nanomaterial, which will be able to restore the internal structure of bones damaged due to osteoporosis and osteomyelitis.

Fewer medical tests -- timely listing for transplantation
Younger patients would benefit greatly from kidney transplantation. Their expected remaining lifetime may even be doubled by having a transplant.

Uterus transplantation -- ethically just as problematic as altruistic surrogacy
In 2014, the first child to have been gestated in a donated uterus was born.

Advancing transplantation: Hepatitis C-infected organs safe for transplantation when followed by antiviral treatment
Twenty patients at Penn Medicine have been cured of the hepatitis C virus (HCV) following lifesaving kidney transplants from deceased donors who were infected with the disease, according to a study published today in Annals of Internal Medicine.

Transplantation followed by antiviral therapy cured hepatitis C
Twenty patients who received kidneys transplanted from hepatitis C virus (HCV)-infected donors experienced HCV cure, good quality of life, and excellent renal function at one year.

The Journal of Heart and Lung Transplantation: 50 years of heart transplantation progress
This month marks the 50th anniversary of the world's first human heart transplant performed at Groote Schuur Hospital in Cape Town by South African surgeon, Christiaan Barnard.

Older donor lungs should be considered for transplantation
With a scarcity of lungs available for transplantation, the use of lungs from donors older than age 60 has been shown to achieve reasonable outcomes and should be considered as a viable option, according to research published online today in The Annals of Thoracic Surgery.

Read More: Transplantation News and Transplantation Current Events is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to