Warning: Creating default object from empty value in /homepages/28/d236552908/htdocs/medilogy/wp-content/plugins/cleaner-gallery/cleaner-gallery.php on line 84

Warning: Cannot modify header information - headers already sent by (output started at /homepages/28/d236552908/htdocs/medilogy/wp-content/plugins/cleaner-gallery/cleaner-gallery.php:84) in /homepages/28/d236552908/htdocs/medilogy/wp-includes/feed-rss2.php on line 8
Medilogy http://www.medilogy.net The Art of Medicine Thu, 29 Dec 2011 04:34:21 +0000 en hourly 1 http://wordpress.org/?v=3.2 Orthokine Therapy & Kobe Bryant’s Knee http://www.medilogy.net/news/orthokine-therapy/ http://www.medilogy.net/news/orthokine-therapy/#comments Thu, 29 Dec 2011 04:34:21 +0000 admin http://www.medilogy.net/?p=644

Christmas this year was a calling to thousands of NBA fans that, yes, there is going to be a season.  During the Lakers vs. Bulls games the commentator began discussing Kobe’s knee treatment.  The procedure involved centrifuging the patients blood and using the serum as an anti-inflammatory drug.  Tracy McGrady reportedly recommended the therapy to Kobe who has now passed the knowledge on to Alex Rodriguez of the New York Yankees.  Even before the season began I remember Derek Fisher mentioning that Kobe’s knee was better than ever.  I’ve been wondering how the procedure works since the game, so lets take a look at it.

Orthokine therapy was designed by Dr. Peter Wehling of Dusseldorf, Germany.  He has treated numerous influential figures including Pope John Paul III (guess the holy powers didn’t work to well here).  Dr. Wehling has reported a 90% success rate for the procedure, and proclaims it is a long term cure to inflammation and its resulting pain.  To ESPN he reported “I am the only one to have found a way to cure arthiritis.”  Along with his clinic in Germany, Wehling has also opened an outpost in Los Angeles, where he deals with ” a very small and exclusive clientele.”  So how exactly does the procedure work?  Well here we go.

The therapy focuses primarily on Interleukin-1.  IL-1 plays a part in a wide variety of metabolic processes, specifically in immune and inflammatory response.  IL-1 binds to specific cytokine receptors to induce inflammation.  It is also known to play a role in disc degeneration, osteoarthritis, and the breakdown of the cartilage in joints.  Thus the doctor’s focus was to stop this receptor mediated pathway via an antagonist protein.  IL-1RA was that antagonist.  The protein is produced by white blood cells (monocytes) and blocks Il-1 from binding to its receptor to significantly reduce inflammation.  In Dr. Wehlings procedure blood is drawn from the arm by a special syringe in which glass beads induce monocytes to increase the growth of Il-1RA by up to 30x.  The solution is placed in an incubator to further induce protein synthesis and the final solution is centrifuged so that the serum of interest may be separated.  The final solution is injected into the area of interest, and it seems to be working pretty well, at least for Kobe Bryant.

Hopefully the technique is further developed and can become more widely used as a potent solution for the problems caused by osteoarthritis, something many of us will face one day, unfortunately.

 Additional details:

Official Website:


http://www.medilogy.net/news/orthokine-therapy/feed/ 19
Finally doing it http://www.medilogy.net/blog/finally-doing-it/ http://www.medilogy.net/blog/finally-doing-it/#comments Sun, 25 Dec 2011 02:35:58 +0000 admin http://www.medilogy.net/?p=614

Must..click...add new..

Well…it was some work, moving the mouse from the middle of the screen to the “Add New Post” button, and the hardest is still to come.  October 20, 2009, that was the last time a post was written for the blog, and now here I am scrounging down in the deepest corners of my brain for something to write.  For the past few months I’ve been reading a lot:  fantasy, thrillers, classics, medical books, journals, and currently Siddhartha Mukherjee’s biography on cancer.  One thing that I haven’t been doing though is writing enough, aside from the everyday college essay that I bring together through the aid of multiple sources, I’ve written…nothing.  With this first post, old rusty gears somewhere in my head are starting to turn again, and hopefully will continue to grind for the next few months and years.  This ‘first’ post is kind of like the first time…actually the many times (for some of us at least), that you see the same beautiful woman over and over..yet are unable to speak to her.  Everyday you contemplate how you will approach her, what you will say, the clothes you’ll wear so that in the end you can execute your plans smoother than Seal Team 6.  Well almost everyday I open this same page, write a sentence, delete it, go to sleep and push the task off to the next day, until now, and I give a hell lot of credit to James Altucher.  This post may not be perfect, as a matter of fact is probably full of mistakes, but improvements can’t be made without practice.

So where are we headed to?

Well even I’m not too sure about the answer to that question.  The blog has undergone two full iterations now.  The first time it was rather personal with some very random posts.  After that I expanded the blog and made it oriented around delivering health related news.  Every week we added multiple articles related to various medical/pharmaceutical topics.  There are much larger organizations doing that and more efficiently, WebMD, to name one.  So what now?

Everyday I think about the previous day realizing how much I didn’t know then but do now.  I think about the vasts amounts of knowledge available.  I think about the even greater amount of ignorance that surrounds us, and how whether knowingly or unknowingly we sometimes add to this ignorance.  I think about the warfare constantly taking place around the world and the communities of poor in almost every city that could benefit greatly from the money spent on each and every bullet fired in one of these wars.  And damn do I have a strong opinion on all this, so why not share it.  That’s the first goal of my blog, unlike the past, instead of writing posts on random bits of news why not throw in a little opinion. And luckily, the sciences and medicine are always evolving so as I try to keep up with intriguing topics I’ll be sure to share the knowledge.  I remember during organic chemistry, there were questions I had that no website answered clearly.  It was very frustrating, well I hope to post about those kinds of topics as I learn about them also.

So whats the Medilogy looking like now?  News with some opinion, sharing what little I know on medicine and beyond, along with a blog where I’ll tell it all, with 100% honesty, something I’ve learned once more from Mr. Altucher.

See you in the next post, where things get real.

http://www.medilogy.net/blog/finally-doing-it/feed/ 0
The Formation of Bones http://www.medilogy.net/general/the-formation-of-bones/ http://www.medilogy.net/general/the-formation-of-bones/#comments Tue, 20 Oct 2009 20:18:51 +0000 Priya http://www.medilogy.net/?p=507 As we get older, tremendous increase in size of the bones is an important process in development.  Bone growth usually continues until age 25.  However, do you ever wonder how our body makes the bones or transforms cartilage into bones?  This process of replacing tissues with bones is known as ossification.  Ossification is further split into two categories: endochondral ossification where the cartilage is replaced by bone and intramembranous ossification where bone forms from mesenchyme (loose connective tissue derived from the germ layers from an embryo) or fibrous connective tissue.

Endochondral Ossification:  Most bones begin as hyaline cartilage and are converted to bones through endochondral ossification.

  • Chondrocytes, cartilage cells, in the center of bone begin to enlarge, causing the cartilage itself to increase in size.  As this occurs, the matrix begins to calcify thwarting diffusion of nutrients through the calcified cartilage.  As a result, the chondrocytes die and disintegrate due to the lack of nourishment.
  • Soon blood vessels grow and spread around the edges of the cartilage, also known as perichondrium.  This results in the cells within perichondrium to differentiate into osteoblasts which work to create a thin layer of bone around the shaft.  Osteoblasts are responsible for manufacturing and releasing the organic and protein components of bone matrix.  The perichondrium then turns into periosteum since it has transformed from cartilage to bone.  Periosteum is a fibrous outer layer and a cellular inner layer which wraps around the bone.
  • The increase in activity in the periosteum causes blood supply to increase.  Soon the capillaries and fibroblasts invade the center of the cartilage causing the calcified matrix (in the center) to break down.  The fibroblasts also specialize to form osteoblasts which turn the matrix into spongy bone.  The center where all this is taking place is known as the primary ossification center which soon spreads outward.
  • As the bone continues to grown, marrow cavity is formed through the process of remodeling.  The osteoclasts secrete acids and proteolytic enzymes to dissolve the matrix, resulting in the formation of marrow cavity.  The bone grows both in length and in width.
  • Soon secondary ossification center forms as the ends of the bones which become calcified.  The capillaries and osteoblasts migrate into the center of the epiphyses, ends of the bones.  The same process that occurred at the primary ossification center occurs in the epiphyses.
  • The epiphysis is occupied with spongy bone; however, some of the original cartilage remains exposed to the joint cavity called articular cartilage.  The articular cartilage thwarts damage to bones when they are in contact.  The epiphysis  is separated from the diaphysis (shaft of the bone) by epiphyseal cartilage or epiphyseal plate.  The epiphyseal plate is usually located at the metaphysis (where epiphysis and diaphysis come together).

Intramembranous Ossification:  This process occurs when osteoblasts differentiate within mesenchymal or fibrous connective tissue to form bones.

  • Mesenchymal cells start the process of ossification as they gather together and produce organic components of matrix, resulting in mineralization of the osteoid (tissue which turns into bone).  These mesenchymal cells then differentiate to form osteoblasts while calcification takes place.  Calcification is the process of depositing calcium or calcium salts.  The bone then grows out from the ossification center in spicules which are small struts.  Some of the osteoblasts become trapped in the process of ossification, forming osteocytes.
  • In order for the bones to continue growing and for the cells to stay alive, they require oxygen and nutrients.  As a result, the fusing of spicules traps some of the blood vessels within the bone.
  • At first, the bone is composed of only spongy bone.  However, through remodeling, compact bone and marrow cavity could be formed.
http://www.medilogy.net/general/the-formation-of-bones/feed/ 4
HIV Vaccines Possible Now? http://www.medilogy.net/news/hiv-vaccines-possible-now/ http://www.medilogy.net/news/hiv-vaccines-possible-now/#comments Thu, 08 Oct 2009 20:22:23 +0000 Priya http://www.medilogy.net/?p=503 AIDS vaccines might be possible as British scientists in a recent study were able to recreate a camouflage mechanism that HIV uses in order to conceal itself from the body’s immune system.  The researchers should be able to use the virus’s strength and turn it into its weakness which might allow them to formulate the first ever vaccine, protecting us against HIV.

A synthetic version of the camouflage mechanism could be injected into the patients, which would teach our immune system to identify HIV and neutralize it.  This idea has been devised into a candidate vaccine and is being evaluated in animals and possibly in humans within two years.  The research is led by Ben Davis, Professor of Organic Chemistry at University of Oxford and is the latest breakthrough in AIDS research.

Moreover, the largest candidate vaccine trial in Thailand indicated that an agent, RV144, can reduce the chances of acquiring an HIV infection by a third.  Although the results and statistical significance were small, this discovery may help us immunize people against the virus and ensures that it is possible to do so.

Another research published last month also provided some breakthrough in AIDS research as they identified two antibodies, which neutralize a wide range of HIV strains.  These antibodies maybe used in designing the vaccines that are far more effective than the RV144.

However, Professor Davis offers a novel method in combating HIV through creation of improved vaccines using the field of synthetic biology.  The scientists are pursuing to recreate natural molecules with slight modifications in hope that they would be pathologically useful.  When HIV binds to the T-cells of the immune system, it uses a surface molecule, glycoprotein 120 (GP-120) in order to infect them.  Although most of the GP-120 mutates quickly, one segment of it always remains uniform, the silent face.  The silent face could be a key target for antibodies produced by vaccines.   The silent face is invisible to human immune system because it is coated by sugars which are too complicated for antibodies of the immune system to distinguish and remove.  “The virus uses this trick to decorate itself with what is effectively camouflage.  It has a cloak of invisibility, as it were,” said Professor Davis.   In most patients, as the silent face goes uncovered, the immune system does not produce antibodies against it; however, in one patient an antibody has been discovered, 2G12.

Davis’s team formulated synthetic sugars which surround the virus’s silent face and slightly altered it so that it would be easy for the immune system to identify it.  Through lab tests, researchers discovered that 2G12 antibody binds to these synthetic molecules, concluding that they should prepare and teach the body to make these antibodies.  “We’ve done the whole thing with chemistry,” he said.  “We’ve built constructs that look like the silent face, but which the body recognizes as being unnatural.  We hope it will create an immune response.  We’re turning the virus’s shield into its Achilles’ heel.  If we can build something that elicits antibodies towards the silent face, we could have a vaccine against HIV.”

In order to test the synthetic silent face molecules, 30 different ones have been created which are implemented in rabbits to reveal whether or not their body would encourage the production of antibodies to fight the silent face.  The results should be available within three to six months.

Remaining hopeful, Professor Davis said, “As soon as one shows neutralizing properties, we hope within two years we could see it in people.”

http://www.medilogy.net/news/hiv-vaccines-possible-now/feed/ 1
Genes manipulation may prevent age-related diseases http://www.medilogy.net/news/genes-manipulation-may-prevent-age-related-diseases/ http://www.medilogy.net/news/genes-manipulation-may-prevent-age-related-diseases/#comments Fri, 02 Oct 2009 19:52:29 +0000 Priya http://www.medilogy.net/?p=499 A new experiment showed that removing certain genes in mice could imitate the effects and benefits of low-calorie diets such as extended lives and prevention of diseases. Scientists said that a drug, which may have similar effect on genes, could help people live longer and healthier lives.

British researchers discovered that removal of a gene associated with nutrients and growth allowed the mice to increase their lifespan by 20 percent, justifying why eating less is better for your health and can increase longevity. A drug that could target this specific gene can also combat aging-related diseases.

“What we have shown is that this gene is one that regulates life span and also determines how healthy animals are in middle and late age,” said Dominic Withers of the Center for Diabetes and Endocrinology at University College London.

The mice were bred by removing the ribosomal S6 protein kinase 1 (S6K1) gene that allowed their bodies to conduct in a “similar way to mammals whose calorie intake is restricted,” said the researchers.

“These mice were resistant to type 2 diabetes … and they also appeared to have reduced incidence of the mouse-equivalent of osteoporosis — so they had stronger bones,” Withers said.

Not only were the mice treated by an experimental condition that enable them to live longer, but they also had improved balance, strength, coordination, suggesting a healthier brain. “Our results demonstrate that S6K1 influences healthy mammalian life span,” the researchers wrote in their study.

In the past, studies about calorie restrictions have discovered that eating less does have long-term benefits and many researchers are hoping to replicate their findings in people through drugs. Withers knew of many pharmaceutical companies attempting to manipulate the S6K1 pathway, hoping that it would prevent age-related diseases, if the treatment or drug were safe.

A similar gene, the AMP-activated protein kinase, AMPK was also on the same pathway as S6K1, suggesting that current drugs which target the AMPK may also produce similar results of increased longevity and improved health. Metformin, a common diabetes drug which stimulates the AMPK, could be used to test this hypothesis.

However, since there is a difference between lifespan of mice and human beings, researchers are uncertain about the extent to which the drugs would affect human health and lifespan. But the researchers remain hopeful as Withers said that the study has been conducted in mice and monkeys and has the potential to offer clues into the human functions.

“The big implication is that intervening in aging protects against a broad spectrum of aging-related diseases, and there is now a druggable pathway providing a means to do this which could be used, in principle, in people,” he said.

http://www.medilogy.net/news/genes-manipulation-may-prevent-age-related-diseases/feed/ 6
Causes of Acne http://www.medilogy.net/beauty/causes-of-acne/ http://www.medilogy.net/beauty/causes-of-acne/#comments Tue, 22 Sep 2009 02:56:02 +0000 Priya http://www.medilogy.net/?p=493 Acne is common in most adolescents and is one of the most widespread skin conditions in the world.  More than 90 percent of adolescents and almost 25 percent of all adults suffer from it.  Although there is no cure, we can still educate ourselves about what causes it, in order to better understand the condition many suffer from.

Most of us suffer from acne during puberty when our body begins to produce hormones called androgens.  These hormones over-stimulate the sebaceous glands, which release an oily lipid secretion.  The secretion is stimulated by adrenal glands and gonads.

Sebum Production:
Sebaceous glands secrete sebum which is a lipid product made up of triacylglycerides, cholesterol, proteins and electrolytes.  Because of the overstimulation of the sebaceous glands by androgens, there is an excessive production of sebum.  As the sebum travels up the follicle and onto the skin surface, it mixes with bacteria and dead skin cells.  This extra production of sebum clogs up the follicles, causing acne.  During adolescent years, the sebum production is at its peak and usually decreases after twenty years.

Bacteria:Causes of Acne, Skin Diagram
On our skin surface lays the bacteria Propionibacterium acne, which maintain the sebum production system.  However, when follicles are plugged, the bacteria quickly multiply, causing inflammation.  These bacteria use sebum as a nutrient for growth; the increase in sebum production allows the bacteria to rapidly increase in number as they have the necessary nutrients for growth.  Through chemotaxis or inflammatory response, the body sends white blood cells to attack the exceeding number of Propionibacterium acne.  As a result, the pimples tend to become red, swollen, and sometimes even painful.  There is also an accumulation of pus as the white blood cells hydrolyze free fatty acids in the follicles.

Follicular Obstruction:
In people with acne, sticky squamous epithelium lines the follicle.  In most people, dead cells from the follicle are shed away as they move to the skin’s surface.  However, in people with acne and increased sebum production, these dead cells are not shed away properly and become adhesive to the follicles.  Sometimes, these cells are shed away at a quicker rate, creating a mixture of sebum and dead skin cells.  This results in the obstruction of follicles and thwarts the skin from naturally renewing itself.

Sometimes the cause of acne is due to the genetic factors or traits we have inherited from our parents.  Researchers have not yet discovered the specific genetic factor that affects acne.

http://www.medilogy.net/beauty/causes-of-acne/feed/ 3
Chocolate reduces risks of Cardiac Death? http://www.medilogy.net/news/chocolate-reduce-risks-cardiac-death/ http://www.medilogy.net/news/chocolate-reduce-risks-cardiac-death/#comments Wed, 16 Sep 2009 03:30:31 +0000 Priya http://www.medilogy.net/?p=487 For all the chocolate lovers out there, you might be able to support your consumption of chocolate using health related reasons.  A study performed by Sweden researchers discovered that people who eat chocolate have an increased survival rate after acquiring a heart attack.

The study include 1,169 subjects both nondiabetic men and women who had been previously hospitalized for their first heart attack.  The subjects had to fill out a uniform health questionnaire, which had questions regarding chocolate consumptions within the past 12 months.  Chocolate, through previous researches, has been known to contain flavonoid antioxidants that are presumed to be beneficial for cardiovascular diseases.

Three months after being discharged from the hospital, the patients were involved in health examinations and were followed by researchers for the next eight months.  The researchers also used the Swedish national registries of hospitalization and deaths in order to examine their patient’s activities within those eight months.  In order to legitimize the study and ensure that the consumption of chocolate was causing the increase in survival rate, researchers had to control age, sex, obesity, physical inactivity, smoking, education, and other factors.

However, before concluding that this study shows a cause and effect correlation, we must scrutinize the study’s weaknesses.  The fact that the study was observational and not randomized suggests that we cannot ascertain that it was cause and effect.  Although researchers had considered many other factors, they had not accounted for the idea of placebo effect.  It may be that the increase in survival rate was due to the improvement in mental health caused by chocolate consumption. Moreover, the scientists also did not examine what type of chocolate the patients were consuming; milk chocolate is known to have less flavonoid than dark chocolate.  Though the chocolate consumption showed an increase in survival of patients who had suffered from a heart attack, it did not confirm a reduction in risk for nonfatal cardiac events.

The study does have many factors that could invalidate the results; however, Dr. David L. Katz, an associate professor of public health a Yale believed that the study was “an interesting element, following a group of adults who’ve had a heart attack and noting an impressive reduction in cardiac deaths.”

Another interesting component of the study was that as the patients consumed more chocolate, their risk of death decreased.  Compared to the patients who consumed no chocolate, those who ate it less than once a month had a 27 percent reduction in risk of cardiac death; those who ate it once a week had a 44 percent reduction, while those who ate it twice or more a week had a remarkable 66 percent reduced in risk for cardiac death.

According to Dr. Kenneth J. Mukamal, an associate professor of medicine at Harvard, there has been tons of data suggesting that chocolate lowered blood pressure, which might be the reason why there was a decrease in risk of cardiac death in this particular study.

Dr. Katz said, “I like the study.  It adds to the general fund of knowledge we already have.”

However, before we all begin replacing health snacks with chocolate, Dr. Mukamal suggested a note of caution, “Although this is interesting and provocative, chocolate does not come without costs.  For people looking for a small snack to finish a meal, this is a great choice.  But it should be supplementing healthy eating and replacing less healthy snacks.”

http://www.medilogy.net/news/chocolate-reduce-risks-cardiac-death/feed/ 0
Teachers get ‘High’ Unknowingly http://www.medilogy.net/general/teachers-get-high-unknowingly/ http://www.medilogy.net/general/teachers-get-high-unknowingly/#comments Wed, 16 Sep 2009 02:39:05 +0000 Adi http://www.medilogy.net/?p=482 When a group of preschool teachers in Los Angeles began to feel giddiness, mood changes, and an intense surge of hunger after eating freshly baked brownies health investigators knew it wasn’t a case of food poisoning.  All this happened when one of the teachers bought homemade brownies from what she believed to be a ‘church’ bake sale and shared them with her son and colleagues at work.

Within 90 minutes five of the teachers became ill and reported symptoms to authorities.  The brownies tested positive for cannabinoids and after seeking medical advice two of the teachers were also tested positive for THC, an active substance in marijuana.

“They didn’t know they were eating pot brownies, so it’s not the same symptoms as someone who deliberately ate them at a party and got high,” Ms. Fogleman, one of the teachers reported.

The teachers eventually recovered and the sidewalk vendor also disappeared after making a meager $1.50 for each brownie.

…wonder how the teacher didn’t realize she was buying a stash of ‘special’ brownies.

http://www.medilogy.net/general/teachers-get-high-unknowingly/feed/ 6
Dirty Showerheads & Bacteria http://www.medilogy.net/health/dirty-showerheads-and-bacteria/ http://www.medilogy.net/health/dirty-showerheads-and-bacteria/#comments Tue, 15 Sep 2009 23:50:54 +0000 Priya http://www.medilogy.net/?p=476 Who knew that your shower could be covering you with a dose of bacteria? Ironically, a new study shows that many showerheads are dirty and might be covering you up with bacteria, which can cause sickness.

A research of fifty showerheads from nine different U.S. cities showed that about 15 showerheads or 30 percent of them contained high levels of Mycobacterium avium which when inhaled or consumed cause lung infections.  These researchers from University of Colorado stated that the amount of Mycobacterium avium found in these showerheads was almost 100 times higher than the number found in household water.

Norman Pace, a researcher, stated, “If you are getting a face full of water when you first turn your shower on, that means you are probably getting a particularly high load of Mycobacterium avium, which may not be too healthy.”

Mycobacterium avium causes pulmonary diseases, which exhibit many common symptoms such as fatigue, breathlessness, and lasting drug cough.  It usually attacks people with deteriorated immune system, but it may sometimes infect others that are healthy.

Pace believes that the increase in pulmonary diseases from “non-tuberculosis” mycobacteria may be caused by people engaging in more showers and fewer baths.  As the showerhead sprays out the water, droplets filled with pathogens linger within the air causing one to inhale the pathogens into the deepest parts of their lungs.  The Mycobacterium avium are able to survive within the showerheads because of the warm, dim, and moist insides where the bacteria are able to form “biofilms.”

Although this might have little to no effect on healthy people, researchers recommend people with deteriorated immune systems to use metal showerheads and replace them as frequently as possible.  “This really shouldn’t concern average, healthy people.  The main concern is for people who are immune-compromised,” researcher Leah Feazel told Reuters Health.

http://www.medilogy.net/health/dirty-showerheads-and-bacteria/feed/ 0
Hair Pigmentation: Why does it Gray? http://www.medilogy.net/beauty/hair-pigmentation-why-gray/ http://www.medilogy.net/beauty/hair-pigmentation-why-gray/#comments Mon, 14 Sep 2009 21:05:07 +0000 Adi http://www.medilogy.net/?p=470 Ever wonder why hair begins to go gray with old age?  Well there are a few different theories to why it happens, but how it happens can be explained more thoroughly with some basic biology.

The Process of Hair Pigmentation

Hair Pigmentation via Melanocytes

Process of Hair Pigmentation

Like our skin, hair get’s its natural pigment from the formation of melanin.  Melanin consists of cells known at melanocytes that position themselves at the openings of hair follicles on the skin’s surface in order to inject themselves into the keratin that our hair is composed of.  Now hair has two types of melanin pigments, a darker brownish pigment known as eumelanin and phaeomelanin, a lighter yellow pigment.  The combination of these two results in the wide array of hair colors.

Throughout the growth of your hair melanocytes continue to pass pigment to keratinocytes, the primary protein substance in hair and nails.  The combination and continual injection of melanocytes leads to different pigments in hair.

So, Why does it Gray?

Pigment production is a complex process and varies depending on genetic factors, one being the Mc1R gene.  The gene is known to have some control associated with the red pigment in human hair and a few other species.  So now what does that have to do with gray hair?

Many families studied have had members with graying hair at early ages, some even as early as their 20’s, clearly proving that genetics plays an important role in determining your hair’s health.  Researchers believe that ethnicity and stress can also be key factors in the production of melonacytes.  Stress harmones may impact the activity and growth of melanocytes, however, a clear link has not yet been found between stress and graying hair.

“Graying could be a result of chronic free radical damage,” says Ralf Paus, professor of dermatology at the University Hospital Schleswig-Holstein in Lübeck, Germany. Stress hormones produced either systemically or …could produce inflammation that drives the production of free radicals—unstable molecules that damage cells—and “it is possible that these free radicals could influence melanin production or induce bleaching of melanin,” Paus says. “There is evidence that local expression of stress hormones mediate the signals instructing melanocytes to deliver melanin to keratinocytes,” notes Jennifer Lin, a dermatologist who conducts molecular biology research at the Dana-Farber / Harvard Cancer Center in Boston.

Another research group suggests that the graying of hair occurs due to a chemical chain reaction caused by a drop in the levels of catalase.  Less catalase means that the hydrogen peroxide in our hair cannot be broken down leading to an eventual build up that bleachers our hair from inside out.  The study hopes to aid in the development of new “anti-graying” products.

Hopefully that answers some of your questions, but a ‘true’ link to the graying of hair has not been clearly defined yet.

http://www.medilogy.net/beauty/hair-pigmentation-why-gray/feed/ 1