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Yu S, Lan CCE, Yu HS. Mechanisms of repigmentation induced by photobiomodulation therapy in vitiligo. Exp Dermatol 2020; 28 Suppl 1:10-14. [PMID: 30698884 DOI: 10.1111/exd.13823] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/25/2018] [Indexed: 12/19/2022]
Abstract
Photobiomodulation (PBM) therapy is based on the exposure of biological tissues to low-level laser light (coherent light) or light-emitting diodes (LEDs; noncoherent light), leading to the modulation of cellular functions, such as proliferation and migration, which result in tissue regeneration. PBM therapy has important clinical applications in regenerative medicine. Vitiligo is an acquired depigmentary disorder resulting from disappearance of functional melanocytes in the involved skin. Vitiligo repigmentation depends on available melanocytes derived from (a) melanocyte stem cells located in the bulge area of hair follicles and (b) the epidermis at the lesional borders, which contains a pool of functional melanocytes. Since follicular melanoblasts (MBs) are derived from the melanocyte stem cells residing at the bulge area of hair follicle, the process of vitiligo repigmentation presents a research model for studying the regenerative effect of PBM therapy. Previous reports have shown favourable response for treatment of vitiligo with a low-energy helium-neon (He-Ne) laser. This review focuses on the molecular events that took place during the repigmentation process of vitiligo triggered by He-Ne laser (632.8 nm, red light). Monochromatic radiation in the visible and infrared A (IRA) range sustains matrix metalloproteinase (MMP), improves mitochondrial function, and increases adenosine triphosphate (ATP) synthesis and O2 consumption, which lead to cellular regenerative pathways. Cytochrome c oxidase in the mitochondria was reported to be the photoacceptor upon which He-Ne laser exerts its effects. Mitochondrial retrograde signalling is responsible for the cellular events by red light. This review shows that He-Ne laser initiated mitochondrial retrograde signalling via a Ca2+ -dependent cascade. The impact on cytochrome c oxidase within the mitochondria, an event that results in activation of CREB (cyclic-AMP response element binding protein)-related cascade, is responsible for the He-Ne laser promoting functional development at different stages of MBs and boosting functional melanocytes. He-Ne laser irradiation induced (a) melanocyte stem cell differentiation; (b) immature outer root sheath MB migration; (c) differentiated outer root sheath MB melanogenesis and migration; and (d) perilesional melanocyte migration and proliferation. These photobiomodulation effects result in perifollocular and marginal repigmentation in vitiligo.
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Affiliation(s)
- Sebastian Yu
- Department of Dermatology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,Graduate Institute of Clinical Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Dermatology, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Dermatology, University of California Davis School of Medicine, Sacramento, California, USA
| | - Cheng-Che E Lan
- Department of Dermatology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,Department of Dermatology, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Hsin-Su Yu
- Department of Dermatology, Kaohsiung Medical University Hospital, Kaohsiung Medical University, Kaohsiung, Taiwan.,Graduate Institute of Clinical Medicine, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.,National Institute of Environmental Health Sciences, National Health Research Institutes, Zhunan, Miaoli County, Taiwan
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Mumic FT, Silveira MRGD, Vilalva KH, Jordani ME, Gomes MCJ, Vanni JC, Vollet Filho JD, Kurachi C, Bagnato VS, Silva ODCE. Effect of irradiation with different laser wavelengths on oxidative stress of non-hepatectomized rats. Acta Cir Bras 2016; 31 Suppl 1:40-4. [DOI: 10.1590/s0102-86502016001300009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Mitochondrial emitted electromagnetic signals mediate retrograde signaling. Med Hypotheses 2015; 85:810-8. [DOI: 10.1016/j.mehy.2015.10.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2015] [Revised: 09/25/2015] [Accepted: 10/09/2015] [Indexed: 12/19/2022]
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Castro e Silva OD, Silveira MRGD. To proliferate, not to proliferate or to die. The liver itself decides as needed. Acta Cir Bras 2014; 29:71-5. [PMID: 24474181 DOI: 10.1590/s0102-86502014000100011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Orlando de Castro e Silva
- Sao Paulo University, Ribeirao Preto School of Medicine, Department of Surgery and Anatomy, Ribeirao PretoSP, Brazil
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Sadaf JR, Israr MQ, Nur O, Willander M, Ding Y, Wang ZL. The correlation between radiative surface defect states and high color rendering index from ZnO nanotubes. NANOSCALE RESEARCH LETTERS 2011; 6:513. [PMID: 21878100 PMCID: PMC3212052 DOI: 10.1186/1556-276x-6-513] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2011] [Accepted: 08/30/2011] [Indexed: 05/31/2023]
Abstract
Combined surface, structural and opto-electrical investigations are drawn from the chemically fashioned ZnO nanotubes and its heterostructure with p-GaN film. A strong correlation has been found between the formation of radiative surface defect states in the nanotubes and the pure cool white light possessing averaged eight color rendering index value of 96 with appropriate color temperature. Highly important deep-red color index value has been realized > 95 which has the capability to render and reproduce natural and vivid colors accurately. Diverse types of deep defect states and their relative contribution to the corresponding wavelengths in the broad emission band is suggested.
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Affiliation(s)
- Jamil R Sadaf
- Department of Science and Technology, Campus Norrköping, Linköping University, SE-601 74 Norrköping, Sweden
| | - Muhammad Q Israr
- Department of Science and Technology, Campus Norrköping, Linköping University, SE-601 74 Norrköping, Sweden
| | - Omer Nur
- Department of Science and Technology, Campus Norrköping, Linköping University, SE-601 74 Norrköping, Sweden
| | - Magnus Willander
- Department of Science and Technology, Campus Norrköping, Linköping University, SE-601 74 Norrköping, Sweden
| | - Yong Ding
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245 USA
| | - Zhong L Wang
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0245 USA
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Mitochondrial medicine and biomedical engineering. Biomed Eng Lett 2011. [DOI: 10.1007/s13534-011-0003-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Carroll J. Photomedicine and LLT Literature Watch. Photomed Laser Surg 2007; 25:463. [PMID: 17975963 DOI: 10.1089/pho.2007.9985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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