Showing posts with label genetics. Show all posts
Showing posts with label genetics. Show all posts

Friday, July 2, 2010

Genes predict living beyond 100

Scientists have developed way of predicting how likely a person is to live beyond the age of 100.

The breakthrough, described in the journal Science, is based on 150 genetic "signposts" found in exceptionally long-lived people.

The researchers created a mathematical model, which takes information from these signposts to work out a person's chance of reaching 100.

It is based on the largest study of centenarians in the world.

This is a rare trait - only one in 6,000 people in industrialised countries reaches such a ripe old age. And 90% them are still disability free by the age of 93.

Read the Article

Monday, May 24, 2010

10 Misconceptions About Neanderthals

As of 2009, the complete Neanderthal genome has been mapped. The most important implication of this is that it now becomes technically possible to clone a Neanderthal – to raise them back from the dead so to speak. The current estimated cost of doing this is $30 million US and no one is putting up the cash. There are ethical questions that are always going to be raised regarding cloning and this is also a hindrance. But there is absolutely no reason not to believe that we will – one day – be able to give birth to and raise a Neanderthal (or at least the closest thing possible to one).

Read the article

Friday, May 21, 2010

No Majesty of God. Just good Chemistry

Scientists create artificial life in laboratory.

Scientists have created synthetic life in the laboratory, in a feat of ingenuity that pushes the boundaries of humankind's ability to manipulate the natural world.

Craig Venter, the biologist who led the effort to map the human genome, said today that the first cell controlled entirely by man-made genetic instructions had been produced.

The synthetic bacterium, nicknamed Synthia, has been hailed as a step-change in biological engineering, allowing the creation of designer organisms with specialised functions that could never have evolved in nature.

The team at the J. Craig Venter Institute in Rockville, Maryland, is investigating how the technology could yield microbes that make vaccines, and algae that turn carbon dioxide into green hydrocarbon biofuels.

Scientists have created synthetic life in the laboratory, in a feat of ingenuity that pushes the boundaries of humankind's ability to manipulate the natural world.

Craig Venter, the biologist who led the effort to map the human genome, said today that the first cell controlled entirely by man-made genetic instructions had been produced.

The synthetic bacterium, nicknamed Synthia, has been hailed as a step-change in biological engineering, allowing the creation of designer organisms with specialised functions that could never have evolved in nature.

The team at the J. Craig Venter Institute in Rockville, Maryland, is investigating how the technology could yield microbes that make vaccines, and algae that turn carbon dioxide into green hydrocarbon biofuels.

Read the Article

Sunday, May 16, 2010

Found:Genes that let you live to 100


An interesting article from the BBC today on the discovery of a set of genes that would ensure people live to over 100 years, regardless of their bad habits.

SCIENTISTS have discovered the “Methuselah” genes whose lucky carriers have a much improved chance of living to 100 even if they indulge in an unhealthy lifestyle.

The genes appear to protect people against the effects of smoking and bad diet and can also delay the onset of age-related illnesses such as cancer and heart disease by up to three decades.

No single gene is a guaranteed fountain of youth. Instead, the secret of longevity probably lies in having the right “suite” of genes, according to new studies of centenarians and their families. Such combinations are extremely rare — only one person in 10,000 reaches the age of 100.

The genes found so far each appear to give a little extra protection against the diseases of old age. Centenarians appear to have a high chance of having several such genes embedded in their DNA.

As science reaches a stage where we can ensure that our bodies don't grow old, the cells in our bodies remained are just as strong with each division, then possibly this would mean that combined with advances in medicine the likelihood of death through natural causes and diseases would be very small.

How old could we hypothetically live for? I'm guessing if we continue to advance as quickly in this area of science as we are now, and are able to understand and manipulate more and more our genetic code then really there is no limit. A world where people cannot die. Its a beautiful but scary thought.

If this was the case, and we could ensure that our children would live forever would it be ethical, in the interests of avoiding the overpopulation of the planet, to prevent reproduction through laws or even sterilization?

Who do we allow to breed? Or put another way, whose genetic code do we choose to be passed onto future generations? It would take artificial selection into a whole new dimension.