Posted on 03/29/2005 6:12:53 PM PST by razoroccam
Hair is good source of stem cells
Most people have about 100,000 hairs on their head
US scientists say they found a good source of stem cells - hair follicles.
The fact that hair grows quickly and is continually replenished makes it an attractive source to harvest the amount of stem cells needed for treatments.
This has been a major stumbling block of stem cell research, as well as controversy surrounding the ethics of harvesting cells from embryos.
The Proceedings of the National Academy of Science study shows nerve cells can be grown from hair follicle stem cells.
Stem cells are immature cells that have the ability to become any kind of tissue in the body.
Hair facts
Hair grows 1.25cm per month on average
Humans have about 100,000 hairs on their head
Blonds have 140,000, brunettes 120,000 and red-heads 90,000
The lifespan of a single head hair varies from race to race, but on average is about 5 years
A new hair takes 3-6 months to grow
Source: Institute of Trichologists
Hair grows from follicles and new follicle cells are born from stem cells that exist in a small bulge on the side of the hair follicle.
Researchers from the University of Pennsylvania have already suggested that these stem cells might be a way of treating baldness.
Now Dr Yasuyuki Amoh and colleagues from the University of California, San Diego, have shown that the same stem cells could potentially be used to treat neurological conditions.
They found that the follicle stem cells from the whiskers of mice expressed a substance called nestin, a known signal to tell cells to develop into neurons.
They then tested whether the follicle cells could develop into mature nerve cells and found that they could when they were transplanted under the skin of the mice.
The follicle stem cells were also able to grow into skin cells, smooth muscle cells and pigment-producing cells called melanocytes.
"These results suggests that hair follicle stem cells may provide an accessible source of stem cells for therapeutic application," said the researchers.
Dr Robin Lovell-Badge, head of the division of developmental genetics at the Medical Research Council's National Institute for Medical Research, said: "It's definitely a source of cells that needs to be explored.
"We want to find the best source of cells possible."
He said it would be important to compare the quality of hair follicle stem cells with stem cells derived from other sources.
He said follicle stem cells did carry the bonus of being relatively accessible.
I started donating at age 23 and I've kept on giving to this day.
Blonds have 140,000, brunettes 120,000 and red-heads 90,000
I knew that blondes have more fun, but I didn't know they have more hair. ;-)
Huh...and here I always thought Hair was just a 1960's Broadway play...a source of unbathed hippies
I am follicularly challenged and so am unable to contribute to this field of research (damn!)
Maybe that is why they are supposed to be hair-brained?
My supply is practically gone, as well.
There's got to be a connection. ;-)
Glad you said "for some of us", especially since you are living in the orient.....
Yes, well, I like to explain my body fur by claiming its an evolutionary trait due to my being from the Scottish tropical heritage. The body grew the fur to promote natural air conditioning via evaporation of perspiration., The hair grew to facilitate a natural wicking process, allowing increased cooling efficiency.
Thats my story and I'm sticking to it.
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