Volume 49, Issue 7 pp. 705-718
Basic Science

A new path in defining light parameters for hair growth: Discovery and modulation of photoreceptors in human hair follicle

Serena Buscone BSc

Serena Buscone BSc

Faculty of Life Sciences, University of Bradford, Centre for Skin Sciences, Bradford, West Yorkshire BD7 1DP, United Kingdom

Philips Research, High Tech Campus 34, Eindhoven 5656 AE, The Netherlands

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Andrei N. Mardaryev MD, PhD

Andrei N. Mardaryev MD, PhD

Faculty of Life Sciences, University of Bradford, Centre for Skin Sciences, Bradford, West Yorkshire BD7 1DP, United Kingdom

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Bianca Raafs BSc

Bianca Raafs BSc

Philips Research, High Tech Campus 34, Eindhoven 5656 AE, The Netherlands

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Jan W. Bikker

Jan W. Bikker

Consultants in Quantitative Methods BV, Eindhoven, The Netherlands

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Carsten Sticht PhD

Carsten Sticht PhD

Faculty Mannheim, University of Heidelberg, Center of Medical Research, Heidelberg, Germany

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Norbert Gretz MD, PhD

Norbert Gretz MD, PhD

Faculty Mannheim, University of Heidelberg, Center of Medical Research, Heidelberg, Germany

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Nilofer Farjo MD

Nilofer Farjo MD

Farjo Hair Institute, Manchester, United Kingdom

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Natallia E. Uzunbajakava PhD

Corresponding Author

Natallia E. Uzunbajakava PhD

Philips Research, High Tech Campus 34, Eindhoven 5656 AE, The Netherlands

Correspondence to: Dr. Natalia V. Botchkareva, MD, University of Bradford, Centre for Skin Sciences, Richmond Road, Bradford, West Yorkshire BD7 1DP, England. E-mail: [email protected]

Correspondence to: Dr. ir. Natallia E. Uzunbajakava, MD, PhD, Philips Research, High Tech Campus 34, 5656 AE, Eindhoven, The Netherlands. E-mail: [email protected]

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Natalia V. Botchkareva MD, PhD

Corresponding Author

Natalia V. Botchkareva MD, PhD

Faculty of Life Sciences, University of Bradford, Centre for Skin Sciences, Bradford, West Yorkshire BD7 1DP, United Kingdom

Correspondence to: Dr. Natalia V. Botchkareva, MD, University of Bradford, Centre for Skin Sciences, Richmond Road, Bradford, West Yorkshire BD7 1DP, England. E-mail: [email protected]

Correspondence to: Dr. ir. Natallia E. Uzunbajakava, MD, PhD, Philips Research, High Tech Campus 34, 5656 AE, Eindhoven, The Netherlands. E-mail: [email protected]

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First published: 18 April 2017
Citations: 76
Conflict of Interest Disclosures: All authors have completed and submitted the ICMJE Form for Disclosure of Potential Conflicts of Interest and have disclosed the following: Natallia E. Uzunbajakava, and Bianca Raafs are the employee of Philips Electronics Netherland B.V. and received salary for this study.

Abstract

Background and Objective

Though devices for hair growth based on low levels of light have shown encouraging results, further improvements of their efficacy is impeded by a lack of knowledge on the exact molecular targets that mediate physiological response in skin and hair follicle. The aim of this study was to investigate the expression of selected light-sensitive receptors in the human hair follicle and to study the impact of UV-free blue light on hair growth ex vivo.

Material and Methods

The expression of Opsin receptors in human skin and hair follicles has been characterized using RT-qPCR and immunofluorescence approaches. The functional significance of Opsin 3 was assessed by silencing its expression in the hair follicle cells followed by a transcriptomic profiling. Proprietary LED-based devices emitting two discrete visible wavelengths were used to access the effects of selected optical parameters on hair growth ex vivo and outer root sheath cells in vitro.

Results

The expression of OPN2 (Rhodopsin) and OPN3 (Panopsin, Encephalopsin) was detected in the distinct compartments of skin and anagen hair follicle. Treatment with 3.2 J/cm2 of blue light with 453 nm central wavelength significantly prolonged anagen phase in hair follicles ex vivo that was correlated with sustained proliferation in the light-treated samples. In contrast, hair follicle treatment with 3.2 J/cm2 of 689 nm light (red light) did not significantly affect hair growth ex vivo. Silencing of OPN3 in the hair follicle outer root sheath cells resulted in the altered expression of genes involved in the control of proliferation and apoptosis, and abrogated stimulatory effects of blue light (3.2 J/cm2; 453 nm) on proliferation in the outer root sheath cells.

Conclusions

We provide the first evidence that (i) OPN2 and OPN3 are expressed in human hair follicle, and (ii) A 453 nm blue light at low radiant exposure exerts a positive effect on hair growth ex vivo, potentially via interaction with OPN3. Lasers Surg. Med. 49:705–718, 2017. © 2017 Wiley Periodicals, Inc.

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