Hair Restoration Blog

Minoxidil (Rogaine) is one of the two proven treatments for hair loss along with hair transplant. Although minoxidil mechanism of action for hair growth is not fully understood, there have been several suggested mechanisms such as:

• Nitric oxide chemical agonist effect impactig scalp blood vessels
• Potassium channel opener causing hyperpolarization of follicles cell membrane
• Vasodilation possibly due to its nitric oxide effect

This new study is done in Department of Immunology of Kyungpook National University in Korea. The result of the study was published in The Journal of Dermatological Science shows a new mechanism for minoxidil as activator of β-catenin pathway in human dermal papilla cells, one of the two stem cells involved in development and growth of hair. The investigators announced that this mechanism could be an explanation for anagen prolongation effect of minoxidil.

The length of the actively growing hair in anagen phase (growth phase) is responsible for hair length. The investigators indicated that maintenance of β-catenin activity in the dermal papilla cells (DPCs) enables hair follicles to keep growing actively. Minoxidil or Rogain promotes hair growth in male patterned baldness suggesting that minoxidil can prolong the growth phase in hair life cycle.

The study is done in mouse model with application of 3% minoxidil for ten days. DPCs were transfected with β-catenin responsive TCF reporter plasmid. They showed that extension of anagen phase was significantly promoted after minoxidil application. The researchers concluded that minoxidil extends the anagen phase by activating β-catenin activity in the DPCs and that can be one of the main pathways in its hair growth or hair loss prevention mechanism.

Studies like this increase our understanding of hair loss and hair growth and over time can help hair restoration field to have more options to fight hair loss in a more efficient way.

Q:

Is Hair cloning or multiplication being done anywhere yet?

A:

Hair cloning or multiplication has been in the news in the last few years. I prefer to use the term hair multiplication, rather than cloning because cloning refers to production of genetically identical organisms. Dolly the most celebrated sheep was the product of first cloning. When it comes to hair, we do not really clone the cells, but we culture them and try to get a whole organism from cultured cells. Unfortunately the process of culturing hair follicle cells has not been as simple as some other tissues in human body. The complexity of hair physiology is due to participation of many different stem cells in development of each hair follicle. In this process, we do not multiply genetic material or DNA of cells.

Hair cloning news

Hair multiplication if become a reality could bring about a great opportunity for bald people with violated donor scalp who cannot be good candidates for hair transplantation with current techniques. Despite our enthusiasm about hair multiplication, hair cloning news in last few years has not been filled with many success stories.

Hair cloning 2007

Year 2006 intercytex company announced that they are going to start phase 3 of hair multiplication study soon. Hair cloning has been in the news and many people are eagerly following that news to see when and how they can get a full head of hair using hair cloning techniques. Unfortunately, cloning hair has not been going that well and in last few years we only had limited research results on hair multiplication in animal models and in human. Here is the question that people usually ask me: Is hair cloning being done anywhere yet? And my answer usually is: Not except on experimental levels. Several investigations are in process on hair multiplication field and hair stem cell research.

Hair cloning 2008

Hair multiplication or as people call it hair cloning is a method that allows us to culture hair follicles and multiply it so we can increase the final number of hairs. So far, we know that it is doable on animals, and there are some reports of its feasibility on human volunteers. Safety has been one of the biggest questions on any research involved with stem cells. Stimulating growth of stem cells has always raised the flag for possible tumor formation. In year 2008, we should witness some results of the phase 3 studies on the procedure. During this year or in next few years, we should have a better understanding of the effectiveness and safety of hair multiplication. I know many of my patients are following hair cloning news carefully. Unfortunately, hair multiplication news has not been very fruitful in last year, but the process is complex and one way or another it will become clear in next few years that we can or cannot use hair multiplication methods in hair restoration surgeries.