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Furukawa M, Yokoi H, Wang J, Ikuyo Y, Tada H, Yamada M, Shikama Y, Matsushita K. Premature gray hair development in the interbrow region owing to the loss of maxillary first molars in young mice. Genes Cells 2024; 29:417-422. [PMID: 38379251 DOI: 10.1111/gtc.13107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 01/29/2024] [Accepted: 02/04/2024] [Indexed: 02/22/2024]
Abstract
The exact sites of premature hair graying and whether tooth loss causes this condition remain unknown. In this study, we aimed to explore the effect of reduced mastication on premature hair graying. Maxillary first molars were extracted from young mice, and the mice were observed for 3 months, along with non-extraction control group mice. After 3 months, gray hair emerged in the interbrow region of mice in the tooth extraction group but not in the control group. The expression of tyrosinase-related protein-2 (TRP-2) mRNA was lower in the interbrow tissues of young mice without maxillary molars than in those with maxillary molars. Tooth loss leads to interbrow gray hair growth, possibly because of weakened trigeminal nerve input, suggesting that reduced mastication causes premature graying. Thus, prompt prosthetic treatment after molar loss is highly recommended.
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Affiliation(s)
- Masae Furukawa
- Department of Oral Disease Research, Geroscience Research Center, National Center for Geriatrics and Gerontology, Obu, Japan
| | - Haruna Yokoi
- Department of Oral Disease Research, Geroscience Research Center, National Center for Geriatrics and Gerontology, Obu, Japan
- Department of Geriatric Oral Science, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Jingshu Wang
- Department of Oral Disease Research, Geroscience Research Center, National Center for Geriatrics and Gerontology, Obu, Japan
| | - Yoriko Ikuyo
- Department of Oral Disease Research, Geroscience Research Center, National Center for Geriatrics and Gerontology, Obu, Japan
- Section of Community Oral Health and Epidemiology, Division of Oral Health, Technology and Epidemiology, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Hirobumi Tada
- Department of Nutrition, Faculty of Wellness, Shigakkan University, Obu, Japan
- Department of Integrative Physiology, Geroscience Research Center, National Center for Geriatrics and Gerontology, Obu, Japan
| | - Mitsuyoshi Yamada
- Department of Oral Disease Research, Geroscience Research Center, National Center for Geriatrics and Gerontology, Obu, Japan
- Department of Operative Dentistry, School of Dentistry, Aichi Gakuin University, Nagoya, Japan
| | - Yosuke Shikama
- Department of Oral Disease Research, Geroscience Research Center, National Center for Geriatrics and Gerontology, Obu, Japan
- Department of Geriatric Oral Science, Graduate School of Dentistry, Tohoku University, Sendai, Japan
| | - Kenji Matsushita
- Department of Oral Disease Research, Geroscience Research Center, National Center for Geriatrics and Gerontology, Obu, Japan
- Department of Geriatric Oral Science, Graduate School of Dentistry, Tohoku University, Sendai, Japan
- Section of Community Oral Health and Epidemiology, Division of Oral Health, Technology and Epidemiology, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
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Arbab AH, Zaroug EE, Mudawi MME. Review on Plants with Traditional Uses and Bio-Activity Against Hair Graying. CURRENT TRADITIONAL MEDICINE 2022. [DOI: 10.2174/2215083808666220208105012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract:
Hair graying occurs worldwide, and it has a high impact on the self-esteem of an individual. Hair graying is a melanogenesis disorder that can be attributed to many factors, including age, oxidative stress, psychological stress, and malnutrition. Though there are effective p-phenylenediamine based hair dyes, they often cause allergy and systematic toxicity. Plants are popular a traditional remedy for the management of hair disorders. Due to their high chemical diversity, phytoproducts offer great promises to develop an effective and safe product to manage hair graying and melanogenesis disorders. The aim of the present article is to review plants with traditional uses and bio-activity against hair graying. An extensive literature search was conducted on PubMed, Science Direct, and Google Scholar databases using many combinations of the following keywords: plants used to treat gray hair, natural products, hair graying, melanogenesis, pigmentation, and tyrosinase activity. This review documented about sixty-one plants, including a summary of 47 plants frequently used in traditional medicine, and a brief review of fourteen plants showing promising activity against hair graying. The active constituents and the mechanisms by which active constituents exert anti-hair graying effects were also reviewed.
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Affiliation(s)
- Ahmed H. Arbab
- Department of Pharmacognosy, Faculty of Pharmacy, University of Khartoum, Khartoum, Sudan
| | - Elwaleed E. Zaroug
- Department of Phytochemistry and Natural Products, Northern Border University, Kingdom of Saudi Arabia
- Department of Pharmacognosy, Faculty of Pharmacy, Omdurman Islamic University, Sudan
| | - Mahmoud M. E. Mudawi
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Northern Border University, Kingdom of Saudi Arabia
- Department of Pharmacology, Faculty of Pharmacy, Omdurman Islamic University, Sudan
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