Irvine, Calif., June 30, 2022 University of California, Irvine-led researchers have discovered that a signaling molecule called SCUBE3 potently stimulates hair growth and may offer a therapeutic treatment for androgenetic alopecia, a common form of hair loss in both women and men.
The study, published online today in Developmental Cell, determined the precise mechanism by which the dermal papilla cells specialized signal-making fibroblasts at the bottom of each hair follicle promote new growth. Although its well known that dermal papilla cells play a pivotal role in controlling hair growth, the genetic basis of the activating molecules involved has been poorly understood.
At different times during the hair follicle life cycle, the very same dermal papilla cells can send signals that either keep follicles dormant or trigger new hair growth, said Maksim Plikus, Ph.D., UCI professor of developmental & cell biology and the studys corresponding author. We revealed that the SCUBE3 signaling molecule, which dermal papilla cells produce naturally, is the messenger used to tell the neighboring hair stem cells to start dividing, which heralds the onset of new hair growth.
The production of activating molecules by the dermal papilla cells is critical for efficient hair growth in mice and humans. In people with androgenetic alopecia, dermal papilla cells malfunction, greatly reducing the normally abundant activating molecules. A mouse model with hyperactivated dermal papilla cells and excessive hair, which will facilitate more discoveries about hair growth regulation, was developed for this research.
Studying this mouse model permitted us to identify SCUBE3 as the previously unknown signaling molecule that can drive excessive hair growth, said co-first author Yingzi Liu, a UCI postdoctoral researcher in developmental & cell biology.
Further tests validated that SCUBE3 activates hair growth in human follicles. Researchers microinjected SCUBE3 into mouse skin in which human scalp follicles had been transplanted, inducing new growth in both the dormant human and surrounding mouse follicles.
These experiments provide proof-of-principle data that SCUBE3 or derived molecules can be a promising therapeutic for hair loss, said co-first author Christian Guerrero-Juarez, a UCI postdoctoral researcher in mathematics.
Currently, there are two medications on the market finasteride and minoxidil that are approved by the Food and Drug Administration for androgenetic alopecia. Finasteride is only approved for use in men. Both drugs are not universally effective and need to be taken daily to maintain their clinical effect.
There is a strong need for new, effective hair loss medicines, and naturally occurring compounds that are normally used by the dermal papilla cells present ideal next-generation candidates for treatment, Plikus said. Our test in the human hair transplant model validates the preclinical potential of SCUBE3.
UCI has filed a provisional patent application on the use of SCUBE3 and its related molecular compounds for hair growth stimulation. Further research will be conducted in the Plikus lab and at Amplifica Holdings Group Inc., a biotechnology company co-founded by Plikus.
The study team included health professionals and academics from UCI, San Diego, China, Japan, Korea and Taiwan.
This work was supported by LEO Foundation grants LF-AW-RAM-19-400008 and LF-OC-20-000611; Chan Zuckerberg Initiative grant AN-0000000062; W.M. Keck Foundation grant WMKF-5634988; National Science Foundation grants DMS1951144 and DMS1763272; National Institutes of Health grants U01-AR073159, R01-AR079470, R01-AR079150, R21-AR078939 and P30-AR075047; Simons Foundation grant 594598; the National Natural Science Foundation of China; the NNSFCs Major Research Plan training program; and Taiwans Ministry of Science and Technology.
About UCIs Brilliant Future campaign:Publicly launched on Oct. 4, 2019, the Brilliant Future campaign aims to raise awareness and support for UCI. By engaging 75,000 alumni and garnering $2 billion in philanthropic investment, UCI seeks to reach new heights of excellence instudent success, health and wellness, research and more. The School of Biological Sciences plays a vital role in the success of the campaign. Learn more by visitinghttps://brilliantfuture.uci.edu/school-of-biological-sciences.
About the University of California, Irvine:Founded in 1965, UCI is the youngest member of the prestigious Association of American Universities and is ranked among the nations top 10 public universities byU.S. News & World Report. The campus has produced five Nobel laureates and is known for its academic achievement, premier research, innovation and anteater mascot. Led by Chancellor Howard Gillman, UCI has more than 36,000 students and offers 224 degree programs. Its located in one of the worlds safest and most economically vibrant communities and is Orange Countys second-largest employer, contributing $7 billion annually to the local economy and $8 billion statewide.For more on UCI, visitwww.uci.edu.
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UCI-led team discovers signaling molecule that potently stimulates hair growth - UCI News
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