Slashdot Mirror
All Blood Converted to Type O?
UnanimousCoward writes "The BBC is reporting that scientists claim to have discovered a technique to convert all blood into Type O with the discovery of an enzyme that can strip the A and B antigens. This has implications to transform the stored blood supply into transfusable blood for all. It does not address the RH negative issue, however."
Now I can't sell my rare blood at a premium. It was my only worthwhile body fluid since they shut down the saliva banks.
You can't talk about Wikipedia's flaws on Wikipedia
The Japanese are totally gonna freak out...
It does not address the RH negative issue, however
OK, so not everyone would be a universal recipient, but most people would be. 85% of the US population (apologies to the international community.
Those are my principles. If you don't like them I have others. -Groucho Marx
While I won't mind the ability of people to donate to me, the benefit is actually pretty amazing. O Negative is the preferred donor type, as (IIRC) anyone can accept it, but no other blood type works for us poor O Neg's.
So this technology could literally save my life!
No! It's a *SIG*. Keep the Special Interest Groups away! (Con joke!)
I take it that you didn't RTFA. The article says nothing about converting the blood in your body to O. The article was all about converted donated, stored blood to type O, the universal donor blood. This breakthrough (if found to be safe and effective) means that type specific donations could be converted and thus increases the supply of available blood. In a shortage now, some patients don't get the blood they need because the only available types are not compatible. This will help mitigate that problem. Of course there will always be a need for type-specific blood but for emergency transfusions, this could save lives.
Well, there's spam egg sausage and spam, that's not got much spam in it.
I wouldn't worry about it. This is only for Type-O transfusions. Since a transfusion doesn't change your blood type (it just supplements your existing plasma until your body can manufacture sufficient replacement quantities), you won't have to worry about those "new diseases". Unless you're normally O-negative, that is...
Javascript + Nintendo DSi = DSiCade
I'm actually surprised that we haven't developed synthetic blood before now. We've known about blood types for 100 years and I keep expecting to see a machine producing blood cells in the news any day now.
Provided with the proper nutrients couldn't we keep a cell alive and dividing to have an unlimited supply?
Something I didn't know before that I learned from the article: Anyone can receive type O blood without risk.
Great post!
Scientists have discovered enzymes that can efficiently convert blood groups A, B and AB into the 'universal' O group -- which can be given to anyone but is always in short supply.
The two novel glycosidase enzymes were identified in bacteria by an international team led by Henrik Clausen of the University of Copenhagen in Denmark. The researchers hope that the enzymes will both improve the erratic supplies of blood around the world, and also the safety of transfusions. Clinical trials to test the safety and effectiveness of their converted blood are being planned.
The ABO blood-type system is based on the presence or absence of the sugar-based antigens 'A' and 'B' on red blood cells. Type O blood cells have neither A nor B antigens, so may be safely transfused into anyone. But types A, B and AB blood do, and cause life-threatening immune reactions if they are given to patients with a different blood group. The bacterial glycosidase enzymes strip these antigens away from A, B and AB blood.
The idea of such antigen-stripping goes back to the early 1980s, with the discovery of an enzyme in coffee beans that removes B antigens from red blood cells1. Early-stage clinical trials showed that the converted blood could be safely transfused into individuals of different blood groups; no traces of enzyme or antigen remained to cause reactions2. But the enzyme reaction was far too inefficient to make large-scale conversion practical.
Clausen's team screened 2,500 extracts from different bacteria and fungi for their ability to cleave off A and B antigens. The newly discovered bacterial 'B' enzyme is nearly 1,000 times more efficient then the coffee-bean B enzyme -- the additional discovery of an enzyme to remove A antigens means that all blood types can now be converted. The work is reported in Nature Biotechnology3.
(snip)
Diesel.
Duh. Rh factor is a combination of several different genes. Blood type isn't controlled by those.
Also, it should be noted that, unlike what several of the replies thus far seem to think, this won't change your blood type - it will only alter blood that has already been removed from the body for future transfusion. Your body will still produce blood of whatever type you normally produce. Also, it basically has the added implication of making more than just O neg the universal donor. After all, if I can 'strip' A, and B off of cells, then A neg, B neg, and AB neg also become universal donors.
But this is slashdot. A slashdoter who didn't build his own computer is like a Jedi who didn't build his own lightsaber!
All bow before me, The Universal Donor!
If you post it, they will read.
Although ABO and RhD grouping systems are the most well-known and the most important, there are a myriad of other blood groups (about 29 last time I checked) that are of relevance when it comes to crossmatching blood for a patient.
Whilst this potentially is a great step forward, as always with biomedical headlines, it's not the be-all and end-all.
Not a member of the General Public
Bad news for Vampires, Type A is the tastiest. So much for just going to the blood bank for meals!
Adidas To Bring Back Sneakernet
Naturally, before this sees widespread clinical use, it'll have to go through a very stringent set of studies, tests, trials, and approvals. So, it may well be 5-10 years before this sees even pilot-program use. Even once in place, this process won't lessen the demand for blood of all types, merely make the blood supply more available.
So, in the meantime, everyone who is able should at least consider donating blood. It is fast, easy, and (nearly) painless. Many may object to the exclusion criteria used by the Red Cross and other organizations, but the overwhelming majority of eligible donors simply do not give. Chances are good that, at some point in your life, you too will need a blood transfusion.
Find a blood drive near you.
Is half a problem not a problem?
Isn't stripping this DRM off of blood going to be illegal under the DMCA? I mean, you've got it DRM'd so that only certain people can use it, and if you're breaking that....
Look out for the RIAA!!
You don't "make a quick buck" by giving blood to the Red Cross.
That's why it's called a blood donation.
you can usually survive 1 non-matching transfusion, even if it's incompatible. After that your immune system is 'primed', much like for a vaccination, and will attack a second transfusion with extreme prejudice, likely resulting in your death.
Which brings up the issue of whether the body would develop an immunity to the enzyme, potentially producing a fatal anaphylactic reaction upon a future transfusion.
On the other hand, if the enzyme remains in the serum rather than attaching to the red cells the reaction would not produce the fatal clumping. Meanwhile the allergy to the enzyme, even if severe, could be handled by other drugs...
Which would also suppress the immune system somewhat - in a hospital "superbug" environment. So artificial type-O will likely remain an emergency measure, and type-O donors will remain in demand.
Bantam Dominique roosters crow a four-note song. Once you've heard it as "Happy BIRTHday" you can't NOT hear it that way
What will happen? Will it rip the markers off their cells too? That sounds like it could have some bad consequences. If it indeed does, then some sort of filtration process or chemical reaction that kills the enzyme only will have to take place, making it even more costly. These are enzymes, so they will not be used up in the chemical reactions.
While I may be naive, this sounds like one of the most significant pieces of medical news I've heard in my lifetime. I'm curious about how much impact this news could have if it turns out to be safe and effective. Type O is in short supply compared to other types, for obvious reasons, but does anyone have any statistics (that aren't made up) concerning deaths as a result of not having the proper type of blood? If the current and future blood supplies were converted to type O (theoretically, I would assume this would be done as needed), how many lives could it save?
When I lived in Japan, I grew so annoyed by the concept of blood-type-based character predestination that I decided to have some fun with the idea. When Japanese people asked me my blood type, I replied 'C', and went on to explain (plausibly enough) that the reason they hadn't heard of it was that it occurred only in European populations. It worked most of the time, although I usually folded and admitted that there was no such thing after stringing them along a bit.
If your comment title says 'Re: Foo', I'm not likely to read it.
The author of the article doesn't seem to understand that 'X negative' is synonymous with 'Type X, RH negative' where X can be A, B, AB or O. See: http://en.wikipedia.org/wiki/Blood_type The positive or negative in a blood type refers to the blood being either positive or negative for the Rhesus (RH) Factor. So there is no such thing as being AB-positive but negative for the RH factor. The preceeding is an oxymoron. Since the author of the article evidently does not understand this, the whole article is unclear and not to be trusted. Either the treated blood is ok for everyone ( both the A, B and also the RH antigens are removed by the enzyme ) or the enzymes remove A and B antigens but not RH antigens. In that case, the blood is not universally safe. Given the author's confusion, I would not hazard to guess which the actual case is.
...
I haven't heard anybody say it yet, so ... HEY SLASHDOT! Get out there and donate blood!
... the rules are harsh.
... I'm actually being serious. It seems to me that there's a pretty strong need for eligible and willing blood donors in my area.
Donating blood is very easy and doesn't take a whole lot of your time. Typically you're not going to be light-headed or anything after you do it. It's recommended that you eat hearty before and after you donate, but how hard is that?
On the plus side, if you donate blood you are helping save somebody's life. LET ME REPEAT THAT. The blood you donate will be used to try to save somebody's life. There is absolutely no reason to give somebody a blood transfusion unless they've sustained a life-threatening injury. When's the last time you've had a blood transfusion? I've never had one, and I've messed myself up pretty bad. I hate to think about the kind of messed-up I'd need to be to require a pint of blood.
What's more, blood banks are regularly short of supply. Hospitals need blood. I know that in my area, they're always begging for extra Type O. I'm O positive. It's a pretty common blood type -- but that doesn't just mean that there's a lot of available supply. It means there's a lot of demand, too.
Consider this, too. Blood banks have all kinds of rules. Some of them you may agree with and some of them you may not. But the rules are in place. Among those rules: If you're a man who has ever had sex with another man since the 1980s, even just once, they don't want your blood. That's right -- gay dudes aren't supposed to donate. Same goes for people who have injected drugs -- even just once. Same goes if you've had a tattoo or piercing in the last 12 months. Same goes if you've spent more than a few months living in England in the last couple decades (it's the BSE thing). Same goes if you've, like, ever had sex with anybody who's a native of Africa. I'm serious, go offer to donate and look at the questionnaire
The point? Well, let's see. Gay dudes, people with tattoos, people who've gotten laid a lot, and people who have done serious drugs are not allowed to donate. I live in San Francisco. So, holy fuck, just who is donating blood in my town??! Not a joke
So I donate. I believe you're allowed to do it every 8 weeks, in the U.S.
Breakfast served all day!
My day job is to run a blood bank.
The enzymes discussed in the article are the next step in 25+ years working toward the goal of making blood universally compatible. The enzymes are years and years away from routine use, if they ever do make it to market. Offhand, major questions that need to be addressed include: Does it *really* work? Is the process cost-effective at manufacturing scales? Is it safe? Does the enzyme affect other proteins so people make antibodies?
Conversion of non-O RBCs to group O RBCs will make them more widely compatible, and may alleviate the shortage of group O RBCs, but does not affect Rh compatibility or the compatibility of platelets or of FFP. We would still have shortages of these products even when the process is up and running, and, so, we still need people to donate.
There are a number of guesses, comments, and half-truths posted above. I'll do my best to answer specific (on-topic!) questions posted as replies to this comment.
Teidou.