Q: There was a retrospective study by Lotufo et al. linking male pattern baldness to heart disease. Do you think there are other links like this for androgenetic alopecia?

A: Family studies revealed both the androgen receptor locus on the X chromosome, as well as a new locus on chromosome 3q26. Association studies performed in two independent groups revealed a locus on chromosome 20 (not near any known genes) as well as the androgen receptor on the X chromosome. Read on for the rest of the answer.

Dr. Angela Christiano, a colleague of Dr. Bernstein’s at Columbia University, has been studying the causes of alopecia areata and genetic hair loss for many years. She, in fact, suffers from the disease as well.

The New York Times has published a question and answer interview with Dr. Christiano which covers her own struggle with alopecia, her research into the causes of genetic hair loss, and where she sees the field going in the future.

Two new avenues of scientific research, discussed in an article in the New York Times, might just help enable human beings to regenerate tissue. If we could tap into this capability, the possibilities for medical treatment are limitless. We could regrow an arm, a leg, a hand, repair a heart after a heart attack, or even regrow hair.

It is not a stretch to assume that if scientists can undo the inability of animals to grow heart muscle or limbs, we might someday be able to genetically reverse the inability of a bald person to grow hair.