1
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Wang X, Liu K, Meng Y, Chen J, Zhong Z. The degradation of TYR variants derived from Chinese OCA families is mediated by the ERAD and ERLAD pathway. Gene 2024:148907. [PMID: 39218412 DOI: 10.1016/j.gene.2024.148907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2024] [Revised: 08/27/2024] [Accepted: 08/28/2024] [Indexed: 09/04/2024]
Abstract
Oculocutaneous albinism (OCA) is a genetically heterogeneous group of autosomal recessive disorders, which presents with decreased or absent pigmentation in the hair, skin, and eyes. OCA1, as a subtype of OCA, is caused by mutations in the tyrosinase gene (TYR). In this study, we performed in vitro functional analysis of eight TYR variants (one frameshift variant: c.929dupC (p.Arg311Lysfs*7); seven missense variants: c.896G>A (p.Arg299His), c.1234C>A (p.Pro412Thr), c.1169A>G (p.His390Arg), c.937C>A (p.Pro313Thr), c.636A>T (p.Arg212Ser), c.623 T>G (p.Leu208Arg), c.1325C>A (p.Ser442Tyr)) identified in Chinese OCA families. TYR plasmids were transfected into HEK 293 T cells to explore the effects of TYR variants on their processing, protein expression, activity, and degradation. The results showed that all eight variants caused TYR to be retained in the endoplasmic reticulum (ER), processing was blocked, and TYR activity almost disappeared; the frameshift variant caused the size of the TYR protein to be reduced by about 30KD, and the protein expression of the remaining seven missense variants was reduced; the ER-associated degradation (ERAD) pathway mediates the degradation of TYR variants that occur on the Tyrosinase copper-binding domain, while the degradation of TYR variants that are not located on that domain may be mediated by a new degradation pathway--ER-to-lysosome-associated degradation (ERLAD). In summary, TYR variants affected their protein processing and activity, and may also induce ER stress and trigger degradation through the ERLAD pathway in addition to the ERAD degradation pathway, providing new insights into the potential pathogenic mechanism for OCA1 caused by TYR variants.
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Affiliation(s)
- Xinyao Wang
- Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Clinical Research Center for Anesthesiology and Perioperative Medicine, Translational Research Institute of Brain and Brain-Like Intelligence, Department of Pediatrics, Shanghai Fourth People's Hospital, School of Medicine, Tongji University, Shanghai 200434, China; Institute of Medical Genetics, Department of Child, Adolescent and Maternal Health, School of Public Health and General Medicine, School of Medicine, Tongji University, Shanghai 200092, China
| | - Kangyu Liu
- Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Clinical Research Center for Anesthesiology and Perioperative Medicine, Translational Research Institute of Brain and Brain-Like Intelligence, Department of Pediatrics, Shanghai Fourth People's Hospital, School of Medicine, Tongji University, Shanghai 200434, China; Institute of Medical Genetics, Department of Child, Adolescent and Maternal Health, School of Public Health and General Medicine, School of Medicine, Tongji University, Shanghai 200092, China
| | - Yunlong Meng
- Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Clinical Research Center for Anesthesiology and Perioperative Medicine, Translational Research Institute of Brain and Brain-Like Intelligence, Department of Pediatrics, Shanghai Fourth People's Hospital, School of Medicine, Tongji University, Shanghai 200434, China; Institute of Medical Genetics, Department of Child, Adolescent and Maternal Health, School of Public Health and General Medicine, School of Medicine, Tongji University, Shanghai 200092, China
| | - Jianjun Chen
- Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Clinical Research Center for Anesthesiology and Perioperative Medicine, Translational Research Institute of Brain and Brain-Like Intelligence, Department of Pediatrics, Shanghai Fourth People's Hospital, School of Medicine, Tongji University, Shanghai 200434, China; Institute of Medical Genetics, Department of Child, Adolescent and Maternal Health, School of Public Health and General Medicine, School of Medicine, Tongji University, Shanghai 200092, China.
| | - Zilin Zhong
- Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Clinical Research Center for Anesthesiology and Perioperative Medicine, Translational Research Institute of Brain and Brain-Like Intelligence, Department of Pediatrics, Shanghai Fourth People's Hospital, School of Medicine, Tongji University, Shanghai 200434, China; Institute of Medical Genetics, Department of Child, Adolescent and Maternal Health, School of Public Health and General Medicine, School of Medicine, Tongji University, Shanghai 200092, China.
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2
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Snyman M, Walsdorf RE, Wix SN, Gill JG. The metabolism of melanin synthesis-From melanocytes to melanoma. Pigment Cell Melanoma Res 2024; 37:438-452. [PMID: 38445351 PMCID: PMC11178461 DOI: 10.1111/pcmr.13165] [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: 09/28/2023] [Revised: 02/06/2024] [Accepted: 02/18/2024] [Indexed: 03/07/2024]
Abstract
Melanin synthesis involves the successful coordination of metabolic pathways across multiple intracellular compartments including the melanosome, mitochondria, ER/Golgi, and cytoplasm. While pigment production offers a communal protection from UV damage, the process also requires anabolic and redox demands that must be carefully managed by melanocytes. In this report we provide an updated review on melanin metabolism, including recent data leveraging new techniques, and technologies in the field of metabolism. We also discuss the many aspects of melanin synthesis that intersect with metabolic pathways known to impact melanoma phenotypes and behavior. By reviewing the metabolism of melanin synthesis, we hope to highlight outstanding questions and opportunities for future research that could improve patient outcomes in pigmentary and oncologic disease settings.
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Affiliation(s)
- Marelize Snyman
- Dermatology Department, University of Texas Southwestern Medical Center, Dallas, Texas, 75235
| | - Rachel E. Walsdorf
- Dermatology Department, University of Texas Southwestern Medical Center, Dallas, Texas, 75235
| | - Sophia N. Wix
- Dermatology Department, University of Texas Southwestern Medical Center, Dallas, Texas, 75235
| | - Jennifer G. Gill
- Dermatology Department, University of Texas Southwestern Medical Center, Dallas, Texas, 75235
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3
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Linsaenkart P, Ruksiriwanich W, Muangsanguan A, Sommano SR, Sringarm K, Arjin C, Rachtanapun P, Jantanasakulwong K, Castagnini JM, Chutoprapat R, Boonpisuttinant K. Antioxidant, Anti-Inflammation, and Melanogenesis Inhibition of Sang 5 CMU Rice ( Oryza sativa) Byproduct for Cosmetic Applications. PLANTS (BASEL, SWITZERLAND) 2024; 13:1795. [PMID: 38999635 PMCID: PMC11244455 DOI: 10.3390/plants13131795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2024] [Revised: 06/15/2024] [Accepted: 06/26/2024] [Indexed: 07/14/2024]
Abstract
Prolonged exposure to environmental oxidative stress can result in visible signs of skin aging such as wrinkles, hyperpigmentation, and thinning of the skin. Oryza sativa variety Sang 5 CMU, an inbred rice cultivar from northern Thailand, contains phenolic and flavonoid compounds in its bran and husk portions that are known for their natural antioxidant properties. In this study, we evaluated the cosmetic properties of crude extracts from rice bran and husk of Sang 5 CMU, focusing on antioxidant, anti-inflammatory, anti-melanogenesis, and collagen-regulating properties. Our findings suggest that both extracts possess antioxidant potential against DPPH, ABTS radicals, and metal ions. Additionally, they could downregulate TBARS levels from 125% to 100% of the control, approximately, while increasing the expression of genes related to the NRF2-mediated antioxidant pathway, such as NRF2 and HO-1, in H2O2-induced human fibroblast cells. Notably, rice bran and husk extracts could increase mRNA levels of HO-1 more greatly than the standard L-ascorbic acid, by about 1.29 and 1.07 times, respectively. Furthermore, the crude extracts exhibited anti-inflammatory activity by suppressing nitric oxide production in both mouse macrophage and human fibroblast cells. Specifically, the bran and husk extracts inhibited the gene expression of the inflammatory cytokine IL-6 in LPS-induced inflammation in fibroblasts. Moreover, both extracts demonstrated potential for inhibiting melanin production and intracellular tyrosinase activity in human melanoma cells by decreasing the expression of the transcription factor MITF and the pigmentary genes TYR, TRP-1, and DCT. They also exhibit collagen-stimulating effects by reducing MMP-2 expression in H2O2-induced fibroblasts from 135% to 80% of the control, approximately, and increasing the gene associated with type I collagen production, COL1A1. Overall, the rice bran and husk extracts of Sang 5 CMU showed promise as effective natural ingredients for cosmetic applications.
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Affiliation(s)
- Pichchapa Linsaenkart
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Warintorn Ruksiriwanich
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University, Chiang Mai 50200, Thailand
- Cluster of Valorization and Bio-Green Transformation for Translation Research Innovation of Raw Materials and Products, Chiang Mai University, Chiang Mai 50200, Thailand
- Center of Excellence in Agro Bio-Circular-Green Industry (Agro BCG), Chiang Mai University, Chiang Mai 50200, Thailand
| | - Anurak Muangsanguan
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Sarana Rose Sommano
- Cluster of Valorization and Bio-Green Transformation for Translation Research Innovation of Raw Materials and Products, Chiang Mai University, Chiang Mai 50200, Thailand
- Center of Excellence in Agro Bio-Circular-Green Industry (Agro BCG), Chiang Mai University, Chiang Mai 50200, Thailand
- Department of Plant and Soil Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Korawan Sringarm
- Cluster of Valorization and Bio-Green Transformation for Translation Research Innovation of Raw Materials and Products, Chiang Mai University, Chiang Mai 50200, Thailand
- Center of Excellence in Agro Bio-Circular-Green Industry (Agro BCG), Chiang Mai University, Chiang Mai 50200, Thailand
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Chaiwat Arjin
- Department of Animal and Aquatic Sciences, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
| | - Pornchai Rachtanapun
- Center of Excellence in Agro Bio-Circular-Green Industry (Agro BCG), Chiang Mai University, Chiang Mai 50200, Thailand
- School of Agro-Industry, Faculty of Agro-Industry, Chiang Mai University, Chiang Mai 50100, Thailand
| | - Kittisak Jantanasakulwong
- Center of Excellence in Agro Bio-Circular-Green Industry (Agro BCG), Chiang Mai University, Chiang Mai 50200, Thailand
- School of Agro-Industry, Faculty of Agro-Industry, Chiang Mai University, Chiang Mai 50100, Thailand
| | - Juan M Castagnini
- Research Group in Innovative Technologies for Sustainable Food (ALISOST), Department of Preventive Medicine and Public Health, Food Science, Toxicology and Forensic Medicine, Faculty of Pharmacy, Universitat de València, Avenida Vicent Andrés Estellés s/n, 46100 Burjassot, Spain
| | - Romchat Chutoprapat
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok 10300, Thailand
| | - Korawinwich Boonpisuttinant
- Innovative Natural Products from Thai Wisdoms (INPTW), Faculty of Integrative Medicine, Rajamangala University of Technology Thanyaburi, Pathum Thani 12130, Thailand
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4
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Shu D, Xie W, Liu H, Li J, Jiao J, Mao G, Yang S, Zhang K. Fluorescence monitoring of refluxed tyrosinase using endoplasmic reticulum-localized enzymatic activity-based sensing. Chem Commun (Camb) 2024; 60:5618-5621. [PMID: 38713525 DOI: 10.1039/d4cc00662c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/09/2024]
Abstract
A tyrosinase-activatable fluorescent probe with endoplasmic reticulum targetability was developed for the first time. It can ratiometrically fluoresce and hence be used to monitor refluxed tyrosinase into the endoplasmic reticulum.
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Affiliation(s)
- Dunji Shu
- Laboratory of Chemical Biology & Traditional Chinese Medicine Research, Ministry of Education, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China.
| | - Wenzhi Xie
- Hunan Provincial Key Laboratory of Cytochemistry, School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, P. R. China
| | - Huihong Liu
- Laboratory of Chemical Biology & Traditional Chinese Medicine Research, Ministry of Education, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China.
- Hunan Provincial Key Laboratory of Cytochemistry, School of Chemistry and Chemical Engineering, Changsha University of Science and Technology, Changsha 410114, P. R. China
| | - Jingjing Li
- Laboratory of Chemical Biology & Traditional Chinese Medicine Research, Ministry of Education, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China.
| | - Jinglong Jiao
- Laboratory of Chemical Biology & Traditional Chinese Medicine Research, Ministry of Education, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China.
| | - Guojiang Mao
- Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, P. R. China
| | - Sheng Yang
- Laboratory of Chemical Biology & Traditional Chinese Medicine Research, Ministry of Education, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, P. R. China.
| | - Kai Zhang
- Department of Chemistry, School of Basic Medical Sciences, Southwest Medical University, Luzhou 646000, P. R. China.
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5
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Choi SH, Kim H, Hwang-Bo J, Kim KM, Kwon JE, Lee SR, Hwang SH, Kang SC, Lee YG. Anti-Melanogenic Effects of Cnidium monnieri Extract via p38 Signaling-Mediated Proteasomal Degradation of Tyrosinase. PLANTS (BASEL, SWITZERLAND) 2024; 13:1305. [PMID: 38794376 PMCID: PMC11125256 DOI: 10.3390/plants13101305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 04/30/2024] [Accepted: 05/07/2024] [Indexed: 05/26/2024]
Abstract
Cnidium monnieri fructus is widely used in traditional Oriental medicine for treating female genital disorders, male impotence, frigidity, and skin-related conditions in East Asia. However, the role of C. monnieri fructus extract (CMFE) in melanin synthesis is not well elucidated. This study aimed to investigate the anti-melanogenesis effect and mechanism of action of CMFE in α-MSH-stimulated B16F10 cells. Intracellular melanin content and tyrosinase activity were measured in α-MSH-stimulated B16F10 cells treated with various concentrations of CMFE (0.5-5 μg/mL). mRNA and protein levels of tyrosinase and MITF were evaluated using qRT-PCR and ting. CMFE's effect on the proteasomal degradation of tyrosinase was confirmed using a proteasomal degradation inhibitor, MG132. CMFE treatment activated p38, a protein associated with proteasomal degradation. Treatment with CMFE at up to 5 μg/mL showed no significant cytotoxicity. CMFE significantly reduced α-MSH-stimulated melanin production (43.29 ± 3.55% decrease, p < 0.05) and cellular tyrosinase activity (31.14 ± 3.15% decrease, p < 0.05). Although mRNA levels of MITF and tyrosinase increased, CMFE suppressed tyrosinase protein levels. The suppressive effect of CMFE on tyrosinase protein was blocked by MG132. CMFE inhibited melanogenesis by promoting the proteasome degradation of tyrosinase through p38 activation. These findings suggest that CMFE has the potential to be a natural whitening agent for inhibiting melanogenesis.
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Affiliation(s)
- Soon Ho Choi
- Research Institute, APRG Inc., Yongin 16950, Republic of Korea;
| | - Hyunggun Kim
- Department of Biomechatronic Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea;
| | - Jeon Hwang-Bo
- Department of Biopharmaceutical Biotechnology and Graduate School of Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea; (J.H.-B.); (J.E.K.); (S.H.H.)
| | - Kyoung Mi Kim
- Research Center, CureBio Therapeutics Co., Ltd., Suwon 16229, Republic of Korea;
| | - Jeong Eun Kwon
- Department of Biopharmaceutical Biotechnology and Graduate School of Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea; (J.H.-B.); (J.E.K.); (S.H.H.)
| | - Sung Ryul Lee
- Department of Convergence Biomedical Science, Cardiovascular and Metabolic Disease Center, College of Medicine, Inje University, Busan 47392, Republic of Korea;
| | - Sun Ha Hwang
- Department of Biopharmaceutical Biotechnology and Graduate School of Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea; (J.H.-B.); (J.E.K.); (S.H.H.)
| | - Se Chan Kang
- Department of Biopharmaceutical Biotechnology and Graduate School of Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea; (J.H.-B.); (J.E.K.); (S.H.H.)
| | - Yeong-Geun Lee
- Department of Biopharmaceutical Biotechnology and Graduate School of Biotechnology, Kyung Hee University, Yongin 17104, Republic of Korea; (J.H.-B.); (J.E.K.); (S.H.H.)
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6
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Chen L, Dong Y, Liu L, Zhu M, Qin X. Achieving the maximum efficacy by combining non-ablative fractional laser with vitamin C, vitamin E and ferulic acid serum for skin quality improvement in Asian population. J Cosmet Dermatol 2024; 23:1592-1596. [PMID: 38279196 DOI: 10.1111/jocd.16203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 01/15/2024] [Accepted: 01/18/2024] [Indexed: 01/28/2024]
Affiliation(s)
- Lei Chen
- Department of Dermatology, Artemis Medical Aesthetics Clinic, Changzhou, China
| | - Yujie Dong
- Department of Dermatology, Hanchen Medical Aesthetics Clinic, Kunming, China
| | - Lingyan Liu
- Department of Dermatology, Deyi Skin Deyue Clinic, Shenzhen, China
| | - Mingzhen Zhu
- Department of Dermatology, Yiyi Medical Aesthetics Clinic, Shanghai, China
| | - Xiaolei Qin
- Department of Dermatology, Deyi Skin Deyue Clinic, Shenzhen, China
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7
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Choi BM, Kim M, Hong H, Park TJ, Kim C, Park JS, Chi WJ, Kim SY. Melanin Inhibitory Effect of Tuber himalayense Isolated in Incheon, Korea. J Microbiol Biotechnol 2024; 34:949-957. [PMID: 38480002 DOI: 10.4014/jmb.2311.11021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2023] [Revised: 12/28/2023] [Accepted: 01/18/2024] [Indexed: 05/16/2024]
Abstract
There has been a growing interest in skin beauty and antimelanogenic products. Melanogenesis is the process of melanin synthesis whereby melanocytes are activated by UV light or hormone stimulation to produce melanin. Melanogenesis is mediated by several enzymes, such as tyrosinase (TYR), microphthalmia-associated transcription factor (MITF), tyrosinase-related protein-1 (TRP-1), and TRP-2. In this study, we investigated the effect of Tuber himalayense extract on melanin synthesis in α-melanocyte-stimulating hormone (α-MSH)-treated B16F10 melanoma cells. We confirmed that T. himalayense extract was not toxic to α-MSH-treated B16F10 melanoma cells and exhibited a significant inhibitory effect on melanin synthesis at concentrations of 25, 50, and 100 μg/ml. Additionally, the T. himalayense extract inhibited melanin, TRP-1, TRP-2, tyrosinase, and MITF, which are enzymes involved in melanin synthesis, in a concentration-dependent manner. Furthermore, T. himalayense extract inhibited the mitogen-activated protein kinase (MAPK) pathways, such as extracellular signal-regulated kinase-1/2 (ERK), c-Jun N-terminal kinase (JNK), and p38. Therefore, we hypothesized that various components of T. himalayense extract affect multiple factors involved in melanogenesis in B16F10 cells. Our results indicate that T. himalayense extract could potentially be used as a new material for preparing whitening cosmetics.
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Affiliation(s)
- Byeong Min Choi
- Department of Pharmaceutical Engineering and Biotechnology, Sunmoon University, Chungnam 31460, Republic of Korea
| | - Minkyeong Kim
- Biodiversity Research Department Species Diversity Research Division, National Institute of Biological Resources, Incheon 22689, Korea
| | - Hyehyun Hong
- Department of Pharmaceutical Engineering and Biotechnology, Sunmoon University, Chungnam 31460, Republic of Korea
| | - Tae-Jin Park
- Department of Pharmaceutical Engineering and Biotechnology, Sunmoon University, Chungnam 31460, Republic of Korea
| | - Changmu Kim
- Biodiversity Research Department Species Diversity Research Division, National Institute of Biological Resources, Incheon 22689, Korea
| | - Jin-Soo Park
- Natural Product Informatics Research Center, Korea Institute of Science and Technology, Gangneung 25451, Republic of Korea
| | - Won-Jae Chi
- Biodiversity Research Department Species Diversity Research Division, National Institute of Biological Resources, Incheon 22689, Korea
| | - Seung-Young Kim
- Department of Pharmaceutical Engineering and Biotechnology, Sunmoon University, Chungnam 31460, Republic of Korea
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8
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P SM, S S. Comparative Assessment of Gingival Depigmentation Using Scalpel Versus Microneedling With Ascorbic Acid: A Randomized Controlled Trial. Cureus 2024; 16:e58285. [PMID: 38752063 PMCID: PMC11094566 DOI: 10.7759/cureus.58285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Accepted: 04/15/2024] [Indexed: 05/18/2024] Open
Abstract
Background Gingival pigmentation (GP), characterized by the presence of melanin in the gingival tissues, is a common aesthetic concern in dental practice. While it poses no inherent health risks, the visible discoloration may cause psychological distress for individuals seeking optimal dental aesthetics. Understanding the efficacy of various methods is essential for refining treatment strategies and enhancing patient satisfaction in the realm of gingival depigmentation (GD). Aim The objective of the study was to compare the effectiveness of scalpel and microneedling (MN) with ascorbic acid in the treatment of GD. Materials and methods Sixteen patients who had a complaint of GP were included in the study, of whom eight were allocated for depigmentation with a scalpel, and the other eight patients were treated with the MN technique with ascorbic acid. Postoperative wound healing scores were evaluated on the first and seventh days, respectively. The intensity of depigmentation was assessed at baseline, in the first month, and at the end of the third month, respectively. Results The mean Dummett-Gupta Oral Pigmentation Index (DOPI) score at baseline was 2.65±0.16 and 2.61±0.17 in the surgical and microneedling groups with ascorbic acid, respectively. The mean DOPI score at the end of the third month was 1.67±0.39 and 0.87±0.17 in the scalpel and MN with ascorbic acid groups, respectively. There was a statistically significant difference between the scalpel and MN with ascorbic acid groups at the end of the first and third months, respectively, where MN with ascorbic acid showed aesthetically pleasing outcomes. Patients treated with the scalpel technique showed incomplete healing and ulceration on the first and seventh days after the procedure when compared to the MN technique with ascorbic acid. The healing index scores were statistically significant in the MN with ascorbic acid group. Conclusion The MN technique with ascorbic acid is a successful technique for treating GD. It showed aesthetically gratifying outcomes when compared to the conventional surgical technique.
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Affiliation(s)
- Swarna Meenakshi P
- Periodontics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, IND
| | - Subasree S
- Periodontics, Saveetha Dental College and Hospitals, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, IND
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9
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Kim JH, Sim WJ, Nam J, Park SH, Song JH, Nam TG, Kim JH, Lim W, Lim TG. Skin-whitening effects of Spergularia marina by suppressing MITF translocation. Food Sci Biotechnol 2024; 33:925-933. [PMID: 38371694 PMCID: PMC10866852 DOI: 10.1007/s10068-023-01376-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 05/16/2023] [Accepted: 06/15/2023] [Indexed: 02/20/2024] Open
Abstract
Spergularia marina is a plant that grows in salty regions along the coastline and exerts radical-scavenging and anti-inflammatory effects. In this study, we investigated the skin-whitening effects of S. marina extract (SME) in B16F10 melanoma cells. SME was found to exert radical-scavenging effects. It suppressed α-melanocyte-stimulating hormone-induced melanogenesis and tyrosinase activity. We also assessed the melanin production signaling pathway to identify the inhibitory action mechanism of SME on melanogenesis. SME decreased the protein expression levels of tyrosinase-related protein (TRP)-1, TRP-2, and tyrosinase, which play important roles in melanogenesis. Furthermore, western blotting revealed that SME inhibited the nuclear translocation of melanocyte inducing transcription factor (MITF), which is a transcription factor for TRP-1, TRP-2, and tyrosinase, suggesting that SME exerts its skin-whitening effect by inhibiting MITF nuclear translocation. Therefore, SME may potentially be used in skin-whitening medicines and cosmetics.
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Affiliation(s)
- Jae-Hoon Kim
- Department of Food Science & Biotechnology, Sejong University, Seoul, 05006 Republic of Korea
| | - Woo-Jin Sim
- Department of Food Science & Biotechnology, Sejong University, Seoul, 05006 Republic of Korea
| | - Jisoo Nam
- Department of Food Science & Biotechnology, Sejong University, Seoul, 05006 Republic of Korea
| | - Soo-Hyun Park
- Korea Food Research Institute, Jeollabuk-Do, Republic of Korea
| | - Ji-Hye Song
- Korea Food Research Institute, Jeollabuk-Do, Republic of Korea
| | - Tae Gyu Nam
- Major of Food Science and Biotechnology, Division of Bio-Convergence, Kyounggi University, Suwon, 16227 Republic of Korea
| | - Jong Hun Kim
- Department of Food Science and Biotechnology, Sungshin (Women’s) University, Seoul, 01133 Republic of Korea
| | - Wonchul Lim
- Department of Food Science & Biotechnology, and Carbohydrate Bioproduct Research Center, Sejong University, Seoul, 05006 Republic of Korea
| | - Tae-Gyu Lim
- Department of Food Science & Biotechnology, Sejong University, Seoul, 05006 Republic of Korea
- Department of Food Science & Biotechnology, and Carbohydrate Bioproduct Research Center, Sejong University, Seoul, 05006 Republic of Korea
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10
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Ueda R, Hashimoto R, Fujii Y, Menezes JCJMDS, Takahashi H, Takeda H, Sawasaki T, Motokawa T, Tokunaga K, Fujita H. Membrane-Associated Ubiquitin Ligase RING Finger Protein 152 Orchestrates Melanogenesis via Tyrosinase Ubiquitination. MEMBRANES 2024; 14:43. [PMID: 38392670 PMCID: PMC10890620 DOI: 10.3390/membranes14020043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 01/24/2024] [Accepted: 01/27/2024] [Indexed: 02/24/2024]
Abstract
Lysosomal degradation of tyrosinase, a pivotal enzyme in melanin synthesis, negatively impacts melanogenesis in melanocytes. Nevertheless, the precise molecular mechanisms by which lysosomes target tyrosinase have remained elusive. Here, we identify RING (Really Interesting New Gene) finger protein 152 (RNF152) as a membrane-associated ubiquitin ligase specifically targeting tyrosinase for the first time, utilizing AlphaScreen technology. We observed that modulating RNF152 levels in B16 cells, either via overexpression or siRNA knockdown, resulted in decreased or increased levels of both tyrosinase and melanin, respectively. Notably, RNF152 and tyrosinase co-localized at the trans-Golgi network (TGN). However, upon treatment with lysosomal inhibitors, both proteins appeared in the lysosomes, indicating that tyrosinase undergoes RNF152-mediated lysosomal degradation. Through ubiquitination assays, we found the indispensable roles of both the RING and transmembrane (TM) domains of RNF152 in facilitating tyrosinase ubiquitination. In summary, our findings underscore RNF152 as a tyrosinase-specific ubiquitin ligase essential for regulating melanogenesis in melanocytes.
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Affiliation(s)
- Ryota Ueda
- Faculty of Pharmaceutical Sciences, Nagasaki International University, Sasebo 859-3298, Japan
| | - Rina Hashimoto
- Faculty of Pharmaceutical Sciences, Nagasaki International University, Sasebo 859-3298, Japan
| | - Yuki Fujii
- Faculty of Pharmaceutical Sciences, Nagasaki International University, Sasebo 859-3298, Japan
| | - José C J M D S Menezes
- Faculty of Pharmaceutical Sciences, Nagasaki International University, Sasebo 859-3298, Japan
- Esteem Industries Pvt Ltd., Bicholim 403529, Goa, India
| | | | - Hiroyuki Takeda
- Proteo-Science Center, Ehime University, Matsuyama 790-8577, Japan
| | - Tatsuya Sawasaki
- Proteo-Science Center, Ehime University, Matsuyama 790-8577, Japan
| | - Tomonori Motokawa
- Frontier Research Center, POLA Chemical Industries, Inc., Yokohama 244-0812, Japan
| | - Kenzo Tokunaga
- Department of Pathology, National Institute of Infectious Diseases, Tokyo 162-8640, Japan
| | - Hideaki Fujita
- Faculty of Pharmaceutical Sciences, Nagasaki International University, Sasebo 859-3298, Japan
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11
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Nakamura H, Fukuda M. Establishment of a synchronized tyrosinase transport system revealed a role of Tyrp1 in efficient melanogenesis by promoting tyrosinase targeting to melanosomes. Sci Rep 2024; 14:2529. [PMID: 38291221 PMCID: PMC10827793 DOI: 10.1038/s41598-024-53072-6] [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: 11/28/2023] [Accepted: 01/27/2024] [Indexed: 02/01/2024] Open
Abstract
Tyrosinase (Tyr) is a key enzyme in the process of melanin synthesis that occurs exclusively within specialized organelles called melanosomes in melanocytes. Tyr is synthesized and post-translationally modified independently of the formation of melanosome precursors and then transported to immature melanosomes by a series of membrane trafficking events that includes endoplasmic reticulum (ER)-to-Golgi transport, post-Golgi trafficking, and endosomal transport. Although several important regulators of Tyr transport have been identified, their precise role in each Tyr transport event is not fully understood, because Tyr is present in several melanocyte organelles under steady-state conditions, thereby precluding the possibility of determining where Tyr is being transported at any given moment. In this study, we established a novel synchronized Tyr transport system in Tyr-knockout B16-F1 cells by using Tyr tagged with an artificial oligomerization domain FM4 (named Tyr-EGFP-FM4). Tyr-EGFP-FM4 was initially trapped at the ER under oligomerized conditions, but at 30 min after chemical dissociation into monomers, it was transported to the Golgi and at 9 h reached immature melanosomes. Melanin was then detected at 12 h after the ER exit of Tyr-EGFP-FM4. By using this synchronized Tyr transport system, we were able to demonstrate that Tyr-related protein 1 (Tyrp1), another melanogenic enzyme, is a positive regulator of efficient Tyr targeting to immature melanosomes. Thus, the synchronized Tyr transport system should serve as a useful tool for analyzing the molecular mechanism of each Tyr transport event in melanocytes as well as in the search for new drugs or cosmetics that artificially regulate Tyr transport.
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Affiliation(s)
- Hikari Nakamura
- Laboratory of Membrane Trafficking Mechanisms, Department of Integrative Life Sciences, Graduate School of Life Sciences, Tohoku University, Aobayama, Aoba-Ku, Sendai, Miyagi, 980-8578, Japan
| | - Mitsunori Fukuda
- Laboratory of Membrane Trafficking Mechanisms, Department of Integrative Life Sciences, Graduate School of Life Sciences, Tohoku University, Aobayama, Aoba-Ku, Sendai, Miyagi, 980-8578, Japan.
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12
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Pham TN, Cazier EA, Gormally E, Lawrence P. Valorization of biomass polyphenols as potential tyrosinase inhibitors. Drug Discov Today 2024; 29:103843. [PMID: 38000718 DOI: 10.1016/j.drudis.2023.103843] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Revised: 11/08/2023] [Accepted: 11/17/2023] [Indexed: 11/26/2023]
Abstract
Tyrosinases (TYRs; EC 1.14.18.1) catalyze two sequential oxidative reactions of the melanin biosynthesis pathway and play an important role in mammalian pigmentation and enzymatic browning of fruit and vegetables. Inhibition of TYR activity is therefore an attractive target for new drugs and/or food ingredients. In addition, increasing evidence suggests that TYR regulation could be a novel target for treatments of cancer and Parkinson's disease. Biomasses, notably industrial byproducts and biowaste, are good sustainable sources of phytochemicals that may be valorized into bioactive compounds including TYR inhibitors. This review presents potential applications of biomass-derived polyphenols targeting TYR inhibition. Insights into structure-activity relationships of several polyphenols and their glycosides are highlighted. Finally, some remarks and perspectives on research into new TYR inhibitors from biomass waste are provided.
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Affiliation(s)
- Thanh-Nhat Pham
- UCLy (Lyon Catholic University), ESTBB, Lyon, France; UCLy (Lyon Catholic University), UR CONFLUENCE: Sciences et Humanités (EA 1598), Lyon, France.
| | - Elisabeth A Cazier
- UCLy (Lyon Catholic University), ESTBB, Lyon, France; UCLy (Lyon Catholic University), UR CONFLUENCE: Sciences et Humanités (EA 1598), Lyon, France; Nantes Université, Oniris, GEPEA, UMR 6144, F-44600 Saint-Nazaire, France
| | - Emmanuelle Gormally
- UCLy (Lyon Catholic University), ESTBB, Lyon, France; UCLy (Lyon Catholic University), UR CONFLUENCE: Sciences et Humanités (EA 1598), Lyon, France
| | - Philip Lawrence
- UCLy (Lyon Catholic University), ESTBB, Lyon, France; UCLy (Lyon Catholic University), UR CONFLUENCE: Sciences et Humanités (EA 1598), Lyon, France
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13
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Hong C, Zhang Y, Yang L, Xu H, Cheng K, Lv Z, Chen K, Li Y, Wu H. Epimedin B exhibits pigmentation by increasing tyrosinase family proteins expression, activity, and stability. J Pharm Anal 2024; 14:69-85. [PMID: 38352950 PMCID: PMC10859565 DOI: 10.1016/j.jpha.2023.09.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 07/28/2023] [Accepted: 09/05/2023] [Indexed: 02/16/2024] Open
Abstract
Epimedin B (EB) is one of the main flavonoid ingredients present in Epimedium brevicornum Maxim., a traditional herb widely used in China. Our previous study showed that EB was a stronger inducer of melanogenesis and an activator of tyrosinase (TYR). However, the role of EB in melanogenesis and the mechanism underlying the regulation remain unclear. Herein, as an extension to our previous investigation, we provide comprehensive evidence of EB-induced pigmentation in vivo and in vitro and elucidate the melanogenesis mechanism by assessing its effects on the TYR family of proteins (TYRs) in terms of expression, activity, and stability. The results showed that EB increased TYRs expression through microphthalmia-associated transcription factor-mediated p-Akt (referred to as protein kinase B (PKB))/glycogen synthase kinase 3β (GSK3β)/β-catenin, p-p70 S6 kinase cascades, and protein 38 (p38)/mitogen-activated protein (MAP) kinase (MAPK) and extracellular regulated protein kinases (ERK)/MAPK pathways, after which EB increased the number of melanosomes and promoted their maturation for melanogenesis in melanoma cells and human primary melanocytes/skin tissues. Furthermore, EB exerted repigmentation by stimulating TYR activity in hydroquinone- and N-phenylthiourea-induced TYR inhibitive models, including melanoma cells, zebrafish, and mice. Finally, EB ameliorated monobenzone-induced depigmentation in vitro and in vivo through the enhancement of TYRs stability by inhibiting TYR misfolding, TYR-related protein 1 formation, and retention in the endoplasmic reticulum and then by downregulating the ubiquitination and proteolysis processes. These data conclude that EB can target TYRs and alter their expression, activity, and stability, thus stimulating their pigmentation function, which might provide a novel rational strategy for hypopigmentation treatment in the pharmaceutical and cosmetic industries.
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Affiliation(s)
- Chen Hong
- Department of TCM Chemistry, School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 200000, China
| | - Yifan Zhang
- Department of TCM Chemistry, School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 200000, China
| | - Lili Yang
- Department of Dermatology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, 200000, China
| | - Haoyang Xu
- International Education College, Shanghai University of Traditional Chinese Medicine, Shanghai, 200000, China
| | - Kang Cheng
- Shanghai Inoherb Cosmetics Co., Ltd., Shanghai, 200000, China
| | - Zhi Lv
- Shanghai Inoherb Cosmetics Co., Ltd., Shanghai, 200000, China
| | - Kaixian Chen
- Department of TCM Chemistry, School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 200000, China
| | - Yiming Li
- Department of TCM Chemistry, School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 200000, China
| | - Huali Wu
- Department of TCM Chemistry, School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai, 200000, China
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14
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Kim YS, Lee EB, Yu YJ, Kim GW, Kim WJ, Choi DK. Ethyl Acetate Fraction from a Catalpa ovata G. Don Extract Inhibits ɑ-MSH-Induced Melanogenesis through the cAMP/CREB Pathway. Int J Mol Sci 2023; 25:151. [PMID: 38203322 PMCID: PMC10778878 DOI: 10.3390/ijms25010151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 12/18/2023] [Accepted: 12/20/2023] [Indexed: 01/12/2024] Open
Abstract
The whitening effect of reducing skin pigmentation is one of the most important goals of cosmetics. The purpose of this study was to determine whether Catalpa ovata extract and its fractions have potential as natural skin-lightening agents. Initially, we screened various fractions of Catalpa ovata extract using an in vitro antioxidant assay. Then, the inhibitory effects of C. ovata extract and its fraction on melanogenesis and the related mechanisms were investigated in B16F1 melanoma cells. The results showed that the ethyl acetate fraction (EF) from C. ovata extract markedly inhibited melanin synthesis in a dose-dependent manner at non-toxic concentrations. Furthermore, EF downregulated both the protein and mRNA levels of tyrosinase, which is a specific enzyme that catalyzes the conversion of tyrosine into melanin. We also found that EF decreased the microphthalmia-associated transcription factor (MITF) at the protein and mRNA levels. EF increased the phosphorylation of ERK and suppressed the phosphorylation of JNK and p38 in ɑ-MSH-induced B16F1 cells. These results indicate that EF can regulate the MAPK pathway. In addition, EF has an anti-melanogenic effect via the downregulation of intracellular cyclic-AMP (cAMP). Nineteen major compounds of EF were identified using LC-MS/MS. Taken together, these results suggest that EF may be a potential anti-melanogenic agent for use in skin-whitening cosmetics and in topical treatments for hyperpigmentation disorders.
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Affiliation(s)
- Yon-Suk Kim
- Department of Biotechnology, Research Institute of Inflammatory Disease (RID), College of Biomedical and Health Science, Konkuk University, Chungju 27478, Republic of Korea
| | - Eun-Bin Lee
- Department of Biotechnology, Research Institute of Inflammatory Disease (RID), College of Biomedical and Health Science, Konkuk University, Chungju 27478, Republic of Korea
| | - Ye-Ji Yu
- Department of Applied Life Sciences, Research Institute (RIBHS), College of Biomedical & Health Science, Graduate School, Konkuk University, Chungju 27478, Republic of Korea
| | - Ga-Won Kim
- Department of Applied Life Sciences, Research Institute (RIBHS), College of Biomedical & Health Science, Graduate School, Konkuk University, Chungju 27478, Republic of Korea
| | - Woo-Jung Kim
- Biocenter, Gyeonggido Business and Science Accelerator, Gwanggyo-ro 147, Yeongtong-gu, Suwon 16229, Republic of Korea
| | - Dong-Kug Choi
- Department of Biotechnology, Research Institute of Inflammatory Disease (RID), College of Biomedical and Health Science, Konkuk University, Chungju 27478, Republic of Korea
- Department of Applied Life Sciences, Research Institute (RIBHS), College of Biomedical & Health Science, Graduate School, Konkuk University, Chungju 27478, Republic of Korea
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15
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Logesh R, Prasad SR, Chipurupalli S, Robinson N, Mohankumar SK. Natural tyrosinase enzyme inhibitors: A path from melanin to melanoma and its reported pharmacological activities. Biochim Biophys Acta Rev Cancer 2023; 1878:188968. [PMID: 37657683 DOI: 10.1016/j.bbcan.2023.188968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 08/15/2023] [Accepted: 08/15/2023] [Indexed: 09/03/2023]
Abstract
The skin containing melanin pigment acts as a protective barrier and counteracts the UVR and other environmental stressors to maintain or restore disrupted cutaneous homeostasis. The production of melanin pigment is dependent on tyrosine levels. L-tyrosine and L-dihydroxyphenylalanine (L-DOPA) can serve both as a substrates and intermediates of melanin synthetic pathway and as inducers and positive regulators of melanogenesis. The biosynthesis of melanin is stimulated upon exposure to UVR, which can also stimulate local production of hormonal factors, which can stimulate melanoma development by altering the chemical properties of eu- and pheomelanin. The process of melanogenesis can be altered by several pathways. One involves activation of POMC, with the production of POMC peptides including MSH and ACTH, which increase intracellular cAMP levels, which activates the MITF, and helps to stimulate tyrosinase (TYR) expression and activity. Defects in OCA1 to 4 affects melanogenic activity via posttranslational modifications resulting in proteasomal degradation and reducing pigmentation. Further, altering, the MITF factor, helps to regulate the expression of MRGE in melanoma, and helps to increase the TYR glycosylation in ER. CRH stimulates POMC peptides that regulate melanogenesis and also by itself can stimulate melanogenesis. The POMC, P53, ACTH, MSH, MC1R, MITF, and 6-BH4 are found to be important regulators for pigmentation. Melanogenesis can affect melanoma behaviour and inhibit immune responses. Therefore, we reviewed natural products that would alter melanin production. Our special focus was on targeting melanin synthesis and TYR enzyme activity to inhibit melanogenesis as an adjuvant therapy of melanotic melanoma. Furthermore, this review also outlines the current updated pharmacological studies targeting the TYR enzyme from natural sources and its consequential effects on melanin production.
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Affiliation(s)
- Rajan Logesh
- Department of Pharmacognosy, JSS College of Pharmacy, JSS Academy of Higher Education and Research, Mysuru 570015, Karnataka, India.
| | - Sagar Rajendra Prasad
- Department of Pharmacognosy, Varadaraja Institute of Pharmaceutical Education and Research, Tumkur 572102, Karnataka, India
| | - Sandhya Chipurupalli
- Department of Pharmacology, JSS College of Pharmacy, JSS Academy of Higher Education and Research, Ooty, India
| | - Nirmal Robinson
- Cellular Stress and Immune Response Laboratory, Centre for Cancer Biology, University of South Australia, Adelaide, Australia
| | - Suresh Kumar Mohankumar
- Pharmacy, Swansea University Medical School, Singleton Park, Swansea University, Wales SA2 8PP, United Kingdom
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16
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Griffiths TW, Watson REB, Langton AK. Skin ageing and topical rejuvenation strategies. Br J Dermatol 2023; 189:i17-i23. [PMID: 37903073 DOI: 10.1093/bjd/ljad282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/02/2023] [Indexed: 11/01/2023]
Abstract
Skin ageing is a complex process involving the additive effects of skin's interaction with its external environment, predominantly chronic sun exposure, upon a background of time-dependent intrinsic ageing. Skin health and beauty is considered one of the principal factors perceived to represent overall 'health and wellbeing'; thus, the demand for skin rejuvenation strategies has rapidly increased, with a worldwide annual expenditure expected to grow from $US24.6 billion to around $US44.5 billion by 2030 (https://www.databridgemarketresearch.com/reports/global-facial-rejuvenation-market). Skin rejuvenation can be achieved in several ways, ranging from laser and device-based treatments to chemical peels and injectables; however, topical skin care regimes are a mainstay treatment for ageing skin and all patients seeking skin rejuvenation can benefit from this relatively low-risk intervention. While the most efficacious topical rejuvenation treatment is application of tretinoin (all-trans retinoic acid) - a prescription-only medicine considered to be the clinical 'gold standard' - a hybrid category of 'cosmeceutical' products at the midpoint of the spectrum of cosmetics and pharmaceutical has emerged. This article reviews the clinical manifestations of skin ageing and the available topical treatments for skin rejuvenation, including retinoids, peptides and antioxidants.
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Affiliation(s)
- Tamara W Griffiths
- Centre for Dermatology Research, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
| | - Rachel E B Watson
- Centre for Dermatology Research, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
- A*STAR Skin Research Laboratory (A*SRL), Agency for Science, Technology and Research (A*STAR), Republic of Singapore
| | - Abigail K Langton
- Centre for Dermatology Research, The University of Manchester & Salford Royal NHS Foundation Trust, Manchester Academic Health Science Centre, Manchester, UK
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17
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Zheng PH, Lu YP, Zhang XX, Luan KE, Zhang ZL, Li JJ, Xu T, Li JT, Xian JA, Guo H, Wang AL. New insights into the regulation mechanism of Pacific white shrimp (Litopenaeus vannamei) hepatopancreas under 4-nonylphenol exposure using transcriptome analysis. FISH & SHELLFISH IMMUNOLOGY 2023; 141:109050. [PMID: 37666313 DOI: 10.1016/j.fsi.2023.109050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 08/28/2023] [Accepted: 09/01/2023] [Indexed: 09/06/2023]
Abstract
4-Nonylphenol (4-NP) is one of the common endocrine-disrupting chemicals (EDCs) in estuaries and coastal zones, which can exert detrimental effects on the physiological function of aquatic organisms. However, the molecular response triggered by 4-NP remains largely unknown in Pacific white shrimp (Litopenaeus vannamei). In this study, transcriptomic analysis was performed to investigate the underlying mechanisms of 4-NP toxicity in the hepatopancreas of L. vannamei. Nine RNA-Seq libraries were generated from L. vannamei at 0 h, 24 h, and 48 h following exposure to 4-NP. Compared with 0 h vs 24 h, 962 up- and 463 down-regulated differentially expressed genes (DEGs) were identified, indicating that many genes in L. vannamei were induced to resist adverse circumstances by 4-NP exposure. In contrast, 902 up- and 1027 down-regulated DEGs were revealed in the comparison of 0 h vs 48 h, demonstrating that prolonged exposure to the stress from 4-NP resulted in more inhibited genes. To validate the accuracy of the transcriptome data, eight DEGs were selected for quantitative real-time polymerase chain reaction (qRT-PCR), which were consistent with the RNA-Seq results. Through KEGG pathway enrichment analysis, three specific pathways related to hormonal effects and endocrine function of L. vannamei were enriched significantly, including tyrosine metabolism, insect hormone biosynthesis, and melanogenesis. After 4-NP stress, genes involved in tyrosine metabolism (Tyr) and melanogenesis pathway (AC, CBP, Wnt, Frizzled, Tcf, and Ras) were induced to promote melanin pigment to help shrimp resist adverse environments. In the insect hormone biosynthesis, ALDH, CYP15A1, CYP15A1/C1, and JHE genes were activated to synthesize juvenile hormone (JH), while Spook, Phm, Sad, and CYP18A1 were induced to generate molting hormone. There is an enhanced interaction between the molting hormone and JH, with JH playing a dominant role and maintaining its "classic status quo action". Our study demonstrated that 4-NP exposure led to impairments of biological functions in L. vannamei hepatopancreas. The genes and pathways identified provide novel insights into the molecular mechanisms underlying 4-NP toxicity effects in prawns and enrich the information on the toxicity mechanism of crustaceans in response to EDCs exposure.
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Affiliation(s)
- Pei-Hua Zheng
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-resources, Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences & Key Laboratory for Biology and Genetic Resources of Tropical Crops of Hainan Province, Hainan Institute of Tropical Agricultural Resources, Haikou, 571101, PR China
| | - Yao-Peng Lu
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-resources, Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences & Key Laboratory for Biology and Genetic Resources of Tropical Crops of Hainan Province, Hainan Institute of Tropical Agricultural Resources, Haikou, 571101, PR China
| | - Xiu-Xia Zhang
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-resources, Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences & Key Laboratory for Biology and Genetic Resources of Tropical Crops of Hainan Province, Hainan Institute of Tropical Agricultural Resources, Haikou, 571101, PR China
| | - Ke-Er Luan
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-resources, Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences & Key Laboratory for Biology and Genetic Resources of Tropical Crops of Hainan Province, Hainan Institute of Tropical Agricultural Resources, Haikou, 571101, PR China
| | - Ze-Long Zhang
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-resources, Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences & Key Laboratory for Biology and Genetic Resources of Tropical Crops of Hainan Province, Hainan Institute of Tropical Agricultural Resources, Haikou, 571101, PR China
| | - Jia-Jun Li
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-resources, Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences & Key Laboratory for Biology and Genetic Resources of Tropical Crops of Hainan Province, Hainan Institute of Tropical Agricultural Resources, Haikou, 571101, PR China
| | - Tong Xu
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-resources, Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences & Key Laboratory for Biology and Genetic Resources of Tropical Crops of Hainan Province, Hainan Institute of Tropical Agricultural Resources, Haikou, 571101, PR China
| | - Jun-Tao Li
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-resources, Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences & Key Laboratory for Biology and Genetic Resources of Tropical Crops of Hainan Province, Hainan Institute of Tropical Agricultural Resources, Haikou, 571101, PR China
| | - Jian-An Xian
- Hainan Provincial Key Laboratory for Functional Components Research and Utilization of Marine Bio-resources, Institute of Tropical Biosciences and Biotechnology, Chinese Academy of Tropical Agricultural Sciences & Key Laboratory for Biology and Genetic Resources of Tropical Crops of Hainan Province, Hainan Institute of Tropical Agricultural Resources, Haikou, 571101, PR China.
| | - Hui Guo
- Guangdong South China Sea Key Laboratory of Aquaculture for Aquatic Economic Animals, College of Fisheries, Guangdong Ocean University, Zhanjiang, 524025, PR China.
| | - An-Li Wang
- School of Life Sciences, South China Normal University, Guangzhou, 510631, PR China.
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18
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Ishida T, Morisawa S, Jobu K, Kawada K, Yoshioka S, Miyamura M. Atractylodes lancea rhizome derived exosome-like nanoparticles prevent alpha-melanocyte stimulating hormone-induced melanogenesis in B16-F10 melanoma cells. Biochem Biophys Rep 2023; 35:101530. [PMID: 37637942 PMCID: PMC10458288 DOI: 10.1016/j.bbrep.2023.101530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 08/10/2023] [Accepted: 08/10/2023] [Indexed: 08/29/2023] Open
Abstract
Aberrant melanin overproduction can significantly impact an individual's appearance and cause mental and psychological distress. Current inhibitors of melanin production exert harmful side effects due to inadequate selectivity; thus a need to develop more selective melanin synthesis inhibitors is necessary. Extracellular vesicles are important agents of intercellular signalling in prokaryotes and eukaryotes. Recently, plant-derived nanoparticles, similar to mammalian exosomes, have attracted attention for their use in health research. In this study, to investigate the potential of plant-derived exosome-like nanoparticles (ELNs) as inhibitors of melanin production, we used hot water to extract ELNs from the rhizome of Atractylodes lancea (A-ELNs). The size of A-ENLs ranged from 34 to 401 nm and carried three microRNA: ath-miR166f, ath-miR162a-5p, and ath-miR162b-5p. These A-ENLs were applied to B16-F10 melanoma cells treated with α-melanocyte-stimulating hormone (α-MSH). After A-ELNs were taken up by B16-F10 cells, their melanin levels were significantly reduced. Furthermore, A-ELNs significantly reduced tyrosinase activity in B16-F10 cells and mRNA expression of microphthalmia-associated transcription factor (Mitf), tyrosinase, tyrosinase-related protein 1, and DOPA chrome tautomerase. These results suggest that A-ELN suppresses melanogenic enzymes expression by downregulating Mitf, thereby inhibiting melanin synthesis. Hence, A-ELN can be developed into a novel topical drug after additional studies and optimization.
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Affiliation(s)
- Tomoaki Ishida
- Department of Pharmacy, Kochi Medical School Hospital, 185-1 Kohasu, Oko, Nankoku, Kochi, Japan
| | - Shumpei Morisawa
- Department of Pharmacy, Kochi Medical School Hospital, 185-1 Kohasu, Oko, Nankoku, Kochi, Japan
| | - Kohei Jobu
- Department of Pharmacy, Kochi Medical School Hospital, 185-1 Kohasu, Oko, Nankoku, Kochi, Japan
| | - Kei Kawada
- Department of Pharmacy, Kochi Medical School Hospital, 185-1 Kohasu, Oko, Nankoku, Kochi, Japan
- Graduate School of Integrated Arts and Sciences, Kochi University, 185-1 Kohasu, Oko, Nankoku, Kochi, Japan
| | - Saburo Yoshioka
- Department of Pharmacy, Kochi Medical School Hospital, 185-1 Kohasu, Oko, Nankoku, Kochi, Japan
- Graduate School of Integrated Arts and Sciences, Kochi University, 185-1 Kohasu, Oko, Nankoku, Kochi, Japan
| | - Mitsuhiko Miyamura
- Department of Pharmacy, Kochi Medical School Hospital, 185-1 Kohasu, Oko, Nankoku, Kochi, Japan
- Graduate School of Integrated Arts and Sciences, Kochi University, 185-1 Kohasu, Oko, Nankoku, Kochi, Japan
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19
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Mahalapbutr P, Sabuakham S, Nasoontorn S, Rungrotmongkol T, Silsirivanit A, Suriya U. Discovery of amphotericin B, an antifungal drug as tyrosinase inhibitor with potent anti-melanogenic activity. Int J Biol Macromol 2023; 246:125587. [PMID: 37379954 DOI: 10.1016/j.ijbiomac.2023.125587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 06/05/2023] [Accepted: 06/25/2023] [Indexed: 06/30/2023]
Abstract
Tyrosinase, a rate-limiting enzyme for melanin production, has been the most efficient target for the development of depigmenting agents. Although hydroquinone, kojic acid, and arbutin are the most well-known tyrosinase inhibitors, their adverse effects are inevitable. In the present study, an in silico drug repositioning combined with experimental validation was performed to search for novel potent tyrosinase inhibitors. Docking-based virtual screening results revealed that, among the 3210 FDA-approved drugs available in the ZINC database, amphotericin B, an antifungal drug exhibited the highest binding efficiency against human tyrosinase. Results from tyrosinase inhibition assay demonstrated that amphotericin B could inhibit the activity of mushroom and cellular tyrosinases, especially from MNT-1 human melanoma cells. Molecular modeling results revealed that amphotericin B/human tyrosinase complex exhibited high stability in an aqueous environment. Melanin assay results demonstrated that amphotericin B significantly suppressed melanin production in α-MSH-induced B16F10 murine melanoma and MNT-1 human melanoma cell lines better than the known inhibitor, kojic acid. Mechanistically, amphotericin B treatment significantly activated ERK and Akt signaling pathways, resulting in the decreased expression of MITF and tyrosinase. The obtained results may pursue pre-clinical and clinical studies to examine the possibility of using amphotericin B as an alternative treatment for hyperpigmentation disorders.
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Affiliation(s)
- Panupong Mahalapbutr
- Department of Biochemistry, Center for Translational Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand.
| | - Sahachai Sabuakham
- Department of Biochemistry, Center for Translational Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Sutita Nasoontorn
- Department of Biochemistry, Center for Translational Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Thanyada Rungrotmongkol
- Program in Bioinformatics and Computational Biology, Graduate School, Chulalongkorn University, Bangkok 10330, Thailand; Center of Excellence in Biocatalyst and Sustainable Biotechnology, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Atit Silsirivanit
- Department of Biochemistry, Center for Translational Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Utid Suriya
- Program in Biotechnology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
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20
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Baber MA, Crist CM, Devolve NL, Patrone JD. Tyrosinase Inhibitors: A Perspective. Molecules 2023; 28:5762. [PMID: 37570734 PMCID: PMC10420840 DOI: 10.3390/molecules28155762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/22/2023] [Accepted: 07/27/2023] [Indexed: 08/13/2023] Open
Abstract
Due to its integral role in the biosynthesis of melanin in all kingdoms of life, tyrosinase has become an extremely important target for inhibition in several sectors of research including agricultural and cosmetic research. Inhibitors of tyrosinase have made it to the market in the cosmetics industry, but their use has been limited due to conflicting efficacy and potential toxicity, which has led to several small molecules being removed from the market. Undaunted, researchers have continued to pursue tyrosinase inhibitors with varying degrees of success. These pursuits have built an impressive and rich library of research. This review is intended to provide a perspective of the past twenty years (2003-2023) of research on tyrosinase inhibitors by highlighting exemplar molecules and developments.
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Affiliation(s)
- Mason A. Baber
- Department of Medicinal Chemistry, University of Michigan, Ann Arbor, MI 48209, USA;
| | - Cole M. Crist
- Program in Biochemistry & Molecular Biology, Rollins College, Winter Park, FL 32789, USA;
| | - Noah L. Devolve
- Department of Chemistry, Rollins College, Winter Park, FL 32789, USA;
| | - James D. Patrone
- Program in Biochemistry & Molecular Biology, Rollins College, Winter Park, FL 32789, USA;
- Department of Chemistry, Rollins College, Winter Park, FL 32789, USA;
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21
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Schubert R, Bae T, Simic B, Smith SN, Park SH, Nagy-Davidescu G, Gradinaru V, Plückthun A, Hur JK. CRISPR-clear imaging of melanin-rich B16-derived solid tumors. Commun Biol 2023; 6:370. [PMID: 37016073 PMCID: PMC10073193 DOI: 10.1038/s42003-023-04614-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Accepted: 02/21/2023] [Indexed: 04/06/2023] Open
Abstract
Tissue clearing combined with deep imaging has emerged as a powerful technology to expand classical histological techniques. Current techniques have been optimized for imaging sparsely pigmented organs such as the mammalian brain. In contrast, melanin-rich pigmented tissue, of great interest in the investigation of melanomas, remains challenging. To address this challenge, we have developed a CRISPR-based gene editing approach that is easily incorporated into existing tissue-clearing workflows such the PACT clearing method. We term this method CRISPR-Clear. We demonstrate its applicability to highly melanin-rich B16-derived solid tumors, including one made transgenic for HER2, constituting one of very few syngeneic mouse tumors that can be used in immunocompetent models. We demonstrate the utility in detailed tumor characterization by staining for targeting antibodies and nanoparticles, as well as expressed fluorescent proteins. With CRISPR-Clear we have unprecedented access to optical interrogation in considerable portions of intact melanoma tissue for stained surface markers, expressed fluorescent proteins, of subcellular compartments, and of the vasculature.
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Affiliation(s)
- Rajib Schubert
- Department of Biochemistry, University of Zürich, Zürich, Switzerland.
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, USA.
- Research and early development, Roche Sequencing Solutions, Pleasanton, CA, USA.
| | - Taegeun Bae
- Department of Medicine, Graduate School, Kyung Hee University, Seoul, South Korea
- College of Pharmacy, The Catholic University of Korea, Gyeonggi-do, South Korea
| | - Branko Simic
- Department of Biochemistry, University of Zürich, Zürich, Switzerland
- Vector BioPharma AG, Basel, Switzerland
| | - Sheena N Smith
- Department of Biochemistry, University of Zürich, Zürich, Switzerland
- Vector BioPharma AG, Basel, Switzerland
| | - Seong-Ho Park
- Department of Medicine, Major in Medical Genetics, Graduate School, Hanyang University, Seoul, South Korea
| | | | - Viviana Gradinaru
- Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA, USA
| | - Andreas Plückthun
- Department of Biochemistry, University of Zürich, Zürich, Switzerland.
| | - Junho K Hur
- Department of Genetics, College of Medicine, Hanyang University, Seoul, South Korea.
- Department of Pathology, College of Medicine, Kyung Hee University, Seoul, South Korea.
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22
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Nunes JA, de Araújo RSA, da Silva FN, Cytarska J, Łączkowski KZ, Cardoso SH, Mendonça-Júnior FJB, da Silva-Júnior EF. Coumarin-Based Compounds as Inhibitors of Tyrosinase/Tyrosine Hydroxylase: Synthesis, Kinetic Studies, and In Silico Approaches. Int J Mol Sci 2023; 24:5216. [PMID: 36982292 PMCID: PMC10048804 DOI: 10.3390/ijms24065216] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 02/22/2023] [Accepted: 03/01/2023] [Indexed: 03/11/2023] Open
Abstract
Cancer represents the main cause of morbidity and mortality worldwide, constituting a serious health problem. In this context, melanoma represents the most aggressive and fatal type of skin cancer, with death rates increasing every year. Scientific efforts have been addressed to the development of inhibitors targeting the tyrosinase enzyme as potential anti-melanoma agents due to the importance of this enzyme in melanogenesis biosynthesis. Coumarin-based compounds have shown potential activity as anti-melanoma agents and tyrosinase inhibitors. In this study, coumarin-based derivatives were designed, synthesized, and experimentally evaluated upon tyrosinase. Compound FN-19, a coumarin-thiosemicarbazone analog, exhibited potent anti-tyrosinase activity, with an IC50 value of 42.16 ± 5.16 µM, being more active than ascorbic acid and kojic acid, both reference inhibitors. The kinetic study showed that FN-19 acts as a mixed inhibitor. Still, for this compound, molecular dynamics (MD) simulations were performed to determine the stability of the complex with tyrosinase, generating RMSD, RMSF, and interaction plots. Additionally, docking studies were performed to elucidate the binding pose at the tyrosinase, suggesting that the hydroxyl group of coumarin derivative performs coordinate bonds (bidentate) with the copper(II) ions at distances ranging from 2.09 to 2.61 Å. Then, MM/PBSA calculations revealed that van der Waals interactions are the most relevant intermolecular forces for complex stabilization. Furthermore, it was observed that FN-19 has a binding energy (ΔEMM) value similar to tropolone, a tyrosinase inhibitor. Therefore, the data obtained in this study will be useful for designing and developing novel coumarin-based analogs targeting the tyrosinase enzyme.
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Affiliation(s)
- Jéssica Alves Nunes
- Biological and Molecular Chemistry Research Group, Institute of Chemistry and Biotechnology, Federal University of Alagoas, AC Simões Campus, Lourival Melo Mota Avenue, s/n, Maceió 57072-970, Alagoas, Brazil (E.F.d.S.-J.)
| | - Rodrigo Santos Aquino de Araújo
- Laboratory of Synthesis and Drug Delivery, Department of Biological Sciences, State University of Paraíba, João Pessoa 58429-500, Paraíba, Brazil
| | - Fabrícia Nunes da Silva
- Laboratory of Organic and Medicinal Synthesis, Federal University of Alagoas, Campus Arapiraca, Manoel Severino Barbosa Avenue, Arapiraca 57309-005, Alagoas, Brazil
| | - Joanna Cytarska
- Department of Chemical Technology and Pharmaceuticals, Faculty of Pharmacy, Collegium Medicum, Nicolaus Copernicus University, Jurasza 2, 85-089 Bydgoszcz, Poland
| | - Krzysztof Z. Łączkowski
- Department of Chemical Technology and Pharmaceuticals, Faculty of Pharmacy, Collegium Medicum, Nicolaus Copernicus University, Jurasza 2, 85-089 Bydgoszcz, Poland
| | - Sílvia Helena Cardoso
- Laboratory of Organic and Medicinal Synthesis, Federal University of Alagoas, Campus Arapiraca, Manoel Severino Barbosa Avenue, Arapiraca 57309-005, Alagoas, Brazil
| | | | - Edeildo Ferreira da Silva-Júnior
- Biological and Molecular Chemistry Research Group, Institute of Chemistry and Biotechnology, Federal University of Alagoas, AC Simões Campus, Lourival Melo Mota Avenue, s/n, Maceió 57072-970, Alagoas, Brazil (E.F.d.S.-J.)
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23
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Fluorescent Probes as a Tool in Diagnostic and Drug Delivery Systems. Pharmaceuticals (Basel) 2023; 16:ph16030381. [PMID: 36986481 PMCID: PMC10056067 DOI: 10.3390/ph16030381] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 02/24/2023] [Accepted: 02/27/2023] [Indexed: 03/06/2023] Open
Abstract
Over the last few years, the development of fluorescent probes has received considerable attention. Fluorescence signaling allows noninvasive and harmless real-time imaging with great spectral resolution in living objects, which is extremely useful for modern biomedical applications. This review presents the basic photophysical principles and strategies for the rational design of fluorescent probes as visualization agents in medical diagnosis and drug delivery systems. Common photophysical phenomena, such as Intramolecular Charge Transfer (ICT), Twisted Intramolecular Charge Transfer (TICT), Photoinduced Electron Transfer (PET), Excited-State Intramolecular Proton Transfer (ESIPT), Fluorescent Resonance Energy Transfer (FRET), and Aggregation-Induced Emission (AIE), are described as platforms for fluorescence sensing and imaging in vivo and in vitro. The presented examples are focused on the visualization of pH, biologically important cations and anions, reactive oxygen species (ROS), viscosity, biomolecules, and enzymes that find application for diagnostic purposes. The general strategies regarding fluorescence probes as molecular logic devices and fluorescence–drug conjugates for theranostic and drug delivery systems are discussed. This work could be of help for researchers working in the field of fluorescence sensing compounds, molecular logic gates, and drug delivery.
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24
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Quercetin 3-O-(6″-O-E-caffeoyl)-β-D-glucopyranoside, a Flavonoid Compound, Promotes Melanogenesis through the Upregulation of MAPKs and Akt/GSK3β/β-Catenin Signaling Pathways. Int J Mol Sci 2023; 24:ijms24054780. [PMID: 36902210 PMCID: PMC10003212 DOI: 10.3390/ijms24054780] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2023] [Revised: 02/22/2023] [Accepted: 02/24/2023] [Indexed: 03/06/2023] Open
Abstract
Quercetin 3-O-(6″-O-E-caffeoyl)-β-D-glucopyranoside is a flavonoid compound produced by various plants with reported antiprotozoal potential against E. histolytica and G. lamblia; however, its effects on skin pigment regulation have not been studied in detail. In this investigation, we discovered that quercetin 3-O-(6″-O-E-caffeoyl)-D-glucopyranoside (coded as CC7) demonstrated a more increased melanogenesis effect in B16 cells. CC7 exhibited no cytotoxicity or effective stimulating melanin content or intracellular tyrosinase activity. This melanogenic-promoting effect was accompanied by activated expression levels of microphthalmia-associated transcription factor (MITF), a key melanogenic regulatory factor, melanogenic enzymes, and tyrosinase (TYR) and tyrosinase-related protein-1 (TRP-1) and 2 (TRP-2) in the CC7-treated cells. Mechanistically, we found that CC7 exerted melanogenic effects by upregulating the phosphorylation of stress-regulated protein kinase (p38) and c-Jun N-terminal kinase (JNK). Moreover, the CC7 upregulation of phosphor-protein kinase B (Akt) and Glycogen synthase kinase-3 beta (GSK-3β) increased the content of β-catenin in the cell cytoplasm, and subsequently, it translocated into the nucleus, resulting in melanogenesis. Specific inhibitors of P38, JNK, and Akt validated that CC7 promotes melanin synthesis and tyrosinase activity by regulating the GSK3β/β-catenin signaling pathways. Our results support that the CC7 regulation of melanogenesis involves MAPKs and Akt/GSK3β/β-catenin signaling pathways.
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25
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Mostafa D, A.Alaizari N, M.AlOtaibi S, Ahmed Aldosari N, Rabie Al-Anazi J, S.Alsughayer R, M.AlFayir H, S.AlHarthi M, H.AlAnazi M. Gingival Depigmentation Using Microneedling Technique With Topical Vitamin C: A Prospective Case Series. Cureus 2023; 15:e35345. [PMID: 36974245 PMCID: PMC10039435 DOI: 10.7759/cureus.35345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/20/2023] [Indexed: 02/25/2023] Open
Abstract
Introduction Gingival pigmentation is mainly physiological due to the production of melanin. This study aimed to evaluate the effectiveness of a microneedling technique using topical ascorbic acid in treating gingival hyperpigmentation. Methods A case-series study was established, and 16 out of 42 participants enrolled in this study according to the inclusion and exclusion criteria. A microneedling technique was performed using a Dermapen instrument, followed by the topical application of ascorbic acid on the pigmented gingiva. Variations in the Dummett oral pigmentation index (DOPI) and Hedin melanin index (HMI) scores were considered for each patient. A one-month follow-up was conducted on all patients. Results All the reported cases demonstrated noticeable improvement at the end of the sessions. Moreover, seven patients showed complete depigmentation of the gingiva. Analysis using paired T-tests showed a statistically significant lower post-treatment DOPI score with a mean difference of 1.8 ± 0.7, 95% CI: 0.17-1.49. Similarly, the HMI score was lower post-treatment with a mean difference of 3.1 ± 0.7, 95% CI: 2.74-3.50. Conclusions Microneedling combined with topical ascorbic acid is a novel, non-invasive dental technique that can effectively treat gingival hyperpigmentation.
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26
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Waku T, Nakada S, Masuda H, Sumi H, Wada A, Hirose S, Aketa I, Kobayashi A. The CNC-family transcription factor Nrf3 coordinates the melanogenesis cascade through macropinocytosis and autophagy regulation. Cell Rep 2023; 42:111906. [PMID: 36640303 DOI: 10.1016/j.celrep.2022.111906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 10/06/2022] [Accepted: 12/09/2022] [Indexed: 12/31/2022] Open
Abstract
Melanin is a pigment produced from the amino acid L-tyrosine in melanosomes. The CNC-family transcription factor Nrf3 is expressed in the basal layer of the epidermis, where melanocytes reside, but its melanogenic function is unclear. Here, we show that Nrf3 regulates macropinocytosis and autophagy to coordinate melanogenesis cascade. In response to an exogenous inducer of melanin production, forskolin, Nrf3 upregulates the core melanogenic gene circuit, which includes Mitf, Tyr, Tyrp1, Pmel, and Oca2. Furthermore, Nrf3 induces the gene expression of Cln3, an autophagosome-related factor, for melanin precursor uptake by macropinocytosis. Ulk2 and Gabarapl2 are also identified as Nrf3-target autophagosome-related genes for melanosome formation. In parallel, Nrf3 prompts autolysosomal melanosome degradation for melanocyte survival. An endogenous melanogenic inducer αMSH also activates Nrf3-mediated melanin production, whereas it is suppressed by an HIV-1 protease inhibitor, nelfinavir. These findings indicate the significant role of Nrf3 in the melanogenesis and the anti-melanogenic potential of nelfinavir.
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Affiliation(s)
- Tsuyoshi Waku
- Laboratory for Genetic Code, Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, 1-3 Miyakodani, Tatara, Kyotanabe, Kyoto 610-0394, Japan.
| | - Sota Nakada
- Laboratory for Genetic Code, Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, 1-3 Miyakodani, Tatara, Kyotanabe, Kyoto 610-0394, Japan
| | - Haruka Masuda
- Laboratory for Genetic Code, Graduate School of Life and Medical Sciences, Doshisha University, 1-3 Miyakodani, Tatara, Kyotanabe, Kyoto 610-0394, Japan
| | - Haruna Sumi
- Laboratory for Genetic Code, Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, 1-3 Miyakodani, Tatara, Kyotanabe, Kyoto 610-0394, Japan
| | - Ayaka Wada
- Laboratory for Genetic Code, Graduate School of Life and Medical Sciences, Doshisha University, 1-3 Miyakodani, Tatara, Kyotanabe, Kyoto 610-0394, Japan
| | - Shuuhei Hirose
- Laboratory for Genetic Code, Graduate School of Life and Medical Sciences, Doshisha University, 1-3 Miyakodani, Tatara, Kyotanabe, Kyoto 610-0394, Japan
| | - Iori Aketa
- Laboratory for Genetic Code, Graduate School of Life and Medical Sciences, Doshisha University, 1-3 Miyakodani, Tatara, Kyotanabe, Kyoto 610-0394, Japan
| | - Akira Kobayashi
- Laboratory for Genetic Code, Department of Medical Life Systems, Faculty of Life and Medical Sciences, Doshisha University, 1-3 Miyakodani, Tatara, Kyotanabe, Kyoto 610-0394, Japan; Laboratory for Genetic Code, Graduate School of Life and Medical Sciences, Doshisha University, 1-3 Miyakodani, Tatara, Kyotanabe, Kyoto 610-0394, Japan.
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27
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Liu Y, Chen Y, Yu Z, Zhang Y. Biological control of melanin biosynthesis pathway on prolific and pleochromatic induction of Lasiodiplodia theobromae. Arch Microbiol 2023; 205:46. [PMID: 36592230 DOI: 10.1007/s00203-022-03396-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 12/12/2022] [Accepted: 12/29/2022] [Indexed: 01/03/2023]
Abstract
To obtain a kind of microbial pigment with high yield and variety coloration by regulating the pigment synthesis pathway in this experiment, Lasiodiplodia theobromae was used to induce pigment secretion by prolific inducing factors (tyrosinase, Cu2+, stilbene glycoside) and pleochromatic inducing factors (L-tyrosine, L-cysteine, tricyclazole). The results showed that through single factor and compound culture, the most reasonable inducing formula was 150 ku/L tyrosinase, while tricyclazole at 10 mg/L for 30 days had a maximum color difference of 42.92 NBS with a reddish-brown color in 10 days. The melanin content increased gradually with the extension of culture time, and the pleochromatic inducing group was up to 3.47 mg/mL, higher than that of the prolific inducing group. However, the poor solubility of purified melanin with a diameter of 100-200 nm was observed in conventional solvents. Through effective induction, it is expected that L. theobromae can secrete melanin stably and be widely used in printing, dyeing, electronics, and the chemical industry.
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Affiliation(s)
- Yuansong Liu
- College of Design and Innovation, Wenzhou Polytechnic, Wenzhou, 325035, China. .,College of Materials Science and Technology, Beijing Forestry University, Beijing, 100083, China. .,Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing, 100083, China.
| | - Yunyun Chen
- College of Design and Innovation, Wenzhou Polytechnic, Wenzhou, 325035, China
| | - Zhiming Yu
- College of Materials Science and Technology, Beijing Forestry University, Beijing, 100083, China.,Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing, 100083, China
| | - Yang Zhang
- College of Materials Science and Technology, Beijing Forestry University, Beijing, 100083, China.,Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing, 100083, China
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28
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Miglitol, an Oral Antidiabetic Drug, Downregulates Melanogenesis in B16F10 Melanoma Cells through the PKA, MAPK, and GSK3β/β-Catenin Signaling Pathways. MOLECULES (BASEL, SWITZERLAND) 2022; 28:molecules28010115. [PMID: 36615308 PMCID: PMC9822252 DOI: 10.3390/molecules28010115] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 12/19/2022] [Accepted: 12/20/2022] [Indexed: 12/28/2022]
Abstract
Hyperpigmentation is a common condition that causes darker spots or patches on the skin, which often look brown, black, gray, red, or pink. This results in unresolved psychological impact due to high anxiety, depression, and somatoform disorder. We aimed to repurpose an antidiabetic drug, miglitol, as an effective compound against hyperpigmentation when applied as a cosmeceutical agent. The present study investigated the antimelanogenic effects of miglitol and the trehalase inhibitor validamycin A. Miglitol in isolation exhibited no cytotoxicity and significantly reduced the melanin production and intracellular tyrosinase activity in B16F10 melanoma cells. The Western blotting results showed that miglitol reduces the expression of melanogenic regulatory factors, including tyrosinase, tyrosinase-related protein (TRP)-1, TRP-2, and microphthalmia-associated transcription factor (MITF). Mechanistically, miglitol appears to suppress melanin synthesis through cAMP-dependent protein kinase (PKA)-dependent downregulation of MITF, a master transcription factor in melanogenesis. The antimelanogenic effects of miglitol was mediated by downregulation of the p38 signaling pathway and upregulation of extracellular signal-regulated kinase (ERK). Moreover, miglitol decreases P-GSK3β and β-catenin levels compared to those in the untreated group. However, miglitol activated P-β-catenin expression compared to that in the untreated group. Finally, we tested the potential of miglitol in topical application through primary human skin irritation tests on the normal skin (upper back) of 33 volunteers. In these assays, miglitol (125 and 250 μM) did not induce any adverse reactions. Taken together, these findings suggest that the regulation of melanogenesis by miglitol may be mediated by the PKA, MAPK, and GSK3β/β-Catenin signaling pathways and that miglitol might provide new insights into drug repurposing for the treatment of hyperpigmentation symptoms.
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29
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Sefi O, Bourgou S, Megdiche-Ksouri W, Libiad M, Khabbach A, El Haissoufi M, Lamchouri F, Krigas N, Ghrabi-Gammar Z. Bioactivities and phenolic composition of Limonium boitardii Maire and L. cercinense Brullo & Erben (Plumbaginaceae): two Tunisian strict endemic plants. INTERNATIONAL JOURNAL OF ENVIRONMENTAL HEALTH RESEARCH 2022; 32:2496-2511. [PMID: 34482786 DOI: 10.1080/09603123.2021.1973970] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 08/24/2021] [Indexed: 06/13/2023]
Abstract
Limonium genus is traditionally used in North Africa for disease treatment and in cosmetic. This study investigates for the first time the antioxidant, anti-inflammatory and enzyme inhibitory activities of two Tunisian endemic plants, L. boitardii and L. cercinense. Analysis of phenolic compounds was carried out by using RP-HPLC. Total phenolic and flavonoid contents, antioxidant activity (antiradical, reducing and total antioxidant activities), tyrosinase and α-glucosidase, collagenase inhibition activities were determined. Inhibiting of NO release in LPS-stimulated macrophages was assessed. L. cercinense exhibited strong antioxidant and anti-inflammatory effects. In the tyrosinase and α-glucosidase inhibitor activity tests, the two species were highly active, especially L. cercinense. High total phenolic and flavonoid contents were recorded in L. cercinense and myricitrin, myricetin, myricetin 3-O-β-D-galatopyranoside, luteolin 7-O-glucoside and rutin were the main phenolics in both species. The results obtained render L. boitardii and L. cercinense as valuable new natural sources for cosmetic and pharmacological applications.
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Affiliation(s)
- Ons Sefi
- Laboratory of Biotechnology, Conservation and Development of Natural Resources (BCVRN)
| | - Soumaya Bourgou
- Laboratoire Des Plantes Aromatiques Et Médicinales, Centre De Biotechnologie De Borj-Cédria, Hammam-Lif Tunisia
| | - Wided Megdiche-Ksouri
- Laboratoire Des Plantes Aromatiques Et Médicinales, Centre De Biotechnologie De Borj-Cédria, Hammam-Lif Tunisia
| | - Mohamed Libiad
- Laboratory of Natural Substances, Pharmacology, Environment, Modelling, Health and Quality of Life (Snamopeq), Polydisciplinary Faculty of Taza, Sidi Mohamed Ben Abdellah University,Taza Gare, Taza Morocco
- Laboratory of Ecology, Systematics and Biodiversity Conservation (Lescobio), Department of Biology,Faculty of Sciences, Abdelmalek Essaâdi University, Tetouan Morocco
| | - Abdelmajid Khabbach
- Laboratory of Natural Substances, Pharmacology, Environment, Modelling, Health and Quality of Life (Snamopeq), Polydisciplinary Faculty of Taza, Sidi Mohamed Ben Abdellah University,Taza Gare, Taza Morocco
- Department of Biology, Faculty of Sciences Dhar El Mahraz, Sidi Mohamed Ben Abdellah University,Fez-Atlas Morocco
| | - Mohamed El Haissoufi
- Laboratory of Natural Substances, Pharmacology, Environment, Modelling, Health and Quality of Life (Snamopeq), Polydisciplinary Faculty of Taza, Sidi Mohamed Ben Abdellah University,Taza Gare, Taza Morocco
| | - Fatima Lamchouri
- Laboratory of Natural Substances, Pharmacology, Environment, Modelling, Health and Quality of Life (Snamopeq), Polydisciplinary Faculty of Taza, Sidi Mohamed Ben Abdellah University,Taza Gare, Taza Morocco
| | - Nikos Krigas
- Institute of Plant Breeding and Genetic Resources, Hellenic Agricultural Organization Demeter, Thessaloniki, Greece
| | - Zeineb Ghrabi-Gammar
- Laboratoire De Recherche Biogéographie, Climatologie Appliquée Et Dynamiques Environnementales (Bicade 18ES13), Faculté Des Lettres Des Arts Et Des Humanités De Manouba, Université De La Manouba, Campus Universitaire De La Manouba, Manouba Tunisia
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30
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Jin Q, Huo C, Yang W, Jin K, Cai S, Zheng Y, Huang B, Wei L, Zhang M, Han Y, Zhang X, Liu Y, Wang X. Regulation of Tyrosinase Gene Expression by Retinoic Acid Pathway in the Pacific Oyster Crassostrea gigas. Int J Mol Sci 2022; 23:12840. [PMID: 36361629 PMCID: PMC9656583 DOI: 10.3390/ijms232112840] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 09/28/2022] [Accepted: 10/19/2022] [Indexed: 08/26/2023] Open
Abstract
Retinoic acid (RA) plays important roles in various biological processes in animals. RA signaling is mediated by two types of nuclear receptors, namely retinoic acid receptor (RAR) and retinoid x receptor (RXR), which regulate gene expression by binding to retinoic acid response elements (RAREs) in the promoters of target genes. Here, we explored the effect of all-trans retinoic acid (ATRA) on the Pacific oyster Crassostera gigas at the transcriptome level. A total of 586 differentially expressed genes (DEGs) were identified in C. gigas upon ATRA treatment, with 309 upregulated and 277 downregulated genes. Bioinformatic analysis revealed that ATRA affects the development, metabolism, reproduction, and immunity of C. gigas. Four tyrosinase genes, including Tyr-6 (LOC105331209), Tyr-9 (LOC105346503), Tyr-20 (LOC105330910), and Tyr-12 (LOC105320007), were upregulated by ATRA according to the transcriptome data and these results were verified by real-time quantitative polymerase chain reaction (RT-qPCR) analysis. In addition, increased expression of Tyr (a melanin-related TYR gene in C. gigas) and Tyr-2 were detected after ATRA treatment. The yeast one-hybrid assay revealed the DNA-binding activity of the RA receptors CgRAR and CgRXR, and the interaction of CgRAR with RARE present in the Tyr-2 promoter. These results provide evidence for the further studies on the role of ATRA and the mechanism of RA receptors in mollusks.
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Affiliation(s)
- Qianqian Jin
- School of Agriculture, Ludong University, Yantai 264025, China
| | - Chuncao Huo
- School of Agriculture, Ludong University, Yantai 264025, China
| | - Wenhao Yang
- School of Agriculture, Ludong University, Yantai 264025, China
| | - Kaidi Jin
- School of Agriculture, Ludong University, Yantai 264025, China
| | - Shuai Cai
- Changdao Enhancement and Experiment Station, Chinese Academy of Fishery Sciences, Yantai 265800, China
| | - Yanxin Zheng
- Changdao Enhancement and Experiment Station, Chinese Academy of Fishery Sciences, Yantai 265800, China
| | - Baoyu Huang
- School of Agriculture, Ludong University, Yantai 264025, China
| | - Lei Wei
- School of Agriculture, Ludong University, Yantai 264025, China
| | - Meiwei Zhang
- School of Agriculture, Ludong University, Yantai 264025, China
| | - Yijing Han
- School of Agriculture, Ludong University, Yantai 264025, China
| | - Xuekai Zhang
- School of Agriculture, Ludong University, Yantai 264025, China
| | - Yaqiong Liu
- School of Agriculture, Ludong University, Yantai 264025, China
| | - Xiaotong Wang
- School of Agriculture, Ludong University, Yantai 264025, China
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31
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Eom S, Lee S, Lee J, Yeom HD, Lee SG, Lee J. DDX3 Upregulates Hydrogen Peroxide-Induced Melanogenesis in Sk-Mel-2 Human Melanoma Cells. Molecules 2022; 27:molecules27207010. [PMID: 36296601 PMCID: PMC9606883 DOI: 10.3390/molecules27207010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 10/08/2022] [Accepted: 10/14/2022] [Indexed: 11/16/2022] Open
Abstract
DDX3 is a DEAD-box RNA helicase with diverse biological functions through multicellular pathways. The objective of this study was to investigate the role of DDX3 in regulating melanogenesis by the exploring signaling pathways involved. Various concentrations of hydrogen peroxide were used to induce melanogenesis in SK-Mel-2 human melanoma cells. Melanin content assays, tyrosinase activity analysis, and Western blot analysis were performed to determine how DDX3 was involved in melanogenesis. Transient transfection was performed to overexpress or silence DDX3 genes. Immunoprecipitation was performed using an antityrosinase antibody. Based on the results of the cell viability test, melanin content, and activity of tyrosinase, a key melanogenesis enzyme, in SK-Mel-2 human melanoma cells, hydrogen peroxide at 0.1 mM was chosen to induce melanogenesis. Treatment with H2O2 notably increased the promoter activity of DDX3. After treatment with hydroperoxide for 4 h, melanin content and tyrosinase activity peaked in DDX3-transfected cells. Overexpression of DDX3 increased melanin content and tyrosinase expression under oxidative stress induced by H2O2. DDX3 co-immunoprecipitated with tyrosinase, a melanogenesis enzyme. The interaction between DDX3 and tyrosinase was strongly increased under oxidative stress. DDX3 could increase melanogenesis under the H2O2-treated condition. Thus, targeting DDX3 could be a novel strategy to develop molecular therapy for skin diseases.
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Affiliation(s)
- Sanung Eom
- Department of Biotechnology, Chonnam National University, Gwangju 61886, Korea
| | - Shinhui Lee
- Department of Biotechnology, Chonnam National University, Gwangju 61886, Korea
| | - Jiwon Lee
- Department of Biotechnology, Chonnam National University, Gwangju 61886, Korea
| | | | - Seong-Gene Lee
- Department of Biotechnology, Chonnam National University, Gwangju 61886, Korea
- Correspondence: (S.-G.L.); (J.L.); Tel.: +82-62-530-2160 (S.-G.L.); +82-62-530-2164 (J.L.)
| | - Junho Lee
- Department of Biotechnology, Chonnam National University, Gwangju 61886, Korea
- Correspondence: (S.-G.L.); (J.L.); Tel.: +82-62-530-2160 (S.-G.L.); +82-62-530-2164 (J.L.)
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32
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Shining Light on Autophagy in Skin Pigmentation and Pigmentary Disorders. Cells 2022; 11:cells11192999. [PMID: 36230960 PMCID: PMC9563738 DOI: 10.3390/cells11192999] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 09/13/2022] [Accepted: 09/23/2022] [Indexed: 01/18/2023] Open
Abstract
Autophagy is a vital process for cell survival and it preserves homeostasis by recycling or disassembling unnecessary or dysfunctional cellular constituents. Autophagy ameliorates skin integrity, regulating epidermal differentiation and constitutive pigmentation. It induces melanogenesis and contributes to skin color through melanosome turnover. Autophagy activity is involved in skin phenotypic plasticity and cell function maintenance and, if altered, it concurs to the onset and/or progression of hypopigmentary and hyperpigmentary disorders. Overexpression of autophagy exerts a protective role against the intrinsic metabolic stress occurring in vitiligo skin, while its dysfunction has been linked to the tuberous sclerosis complex hypopigmentation. Again, autophagy impairment reduces melanosome degradation by concurring to pigment accumulation characterizing senile lentigo and melasma. Here we provide an updated review that describes recent findings on the crucial role of autophagy in skin pigmentation, thus revealing the complex interplay among melanocyte biology, skin environment and autophagy. Hence, targeting this process may also represent a promising strategy for treating pigmentary disorders.
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Newly Designed Quinazolinone Derivatives as Novel Tyrosinase Inhibitor: Synthesis, Inhibitory Activity, and Mechanism. Molecules 2022; 27:molecules27175558. [PMID: 36080324 PMCID: PMC9457556 DOI: 10.3390/molecules27175558] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Revised: 08/20/2022] [Accepted: 08/24/2022] [Indexed: 11/18/2022] Open
Abstract
We synthesized a series of quinazolinone derivates as tyrosinase inhibitors and evaluated their inhibition constants. We synthesized 2-(2,6-dimethylhepta-1,5-dien-1-yl)quinazolin-4(3H)-one (Q1) from the natural citral. The concentration, which led to 50% activity loss of Q1, was 103 ± 2 μM (IC50 = 103 ± 2 μM). Furthermore, we considered Q1 to be a mixed-type and reversible tyrosinase inhibitor, and determined the KI and KIS inhibition constants to be 117.07 μM and 423.63 μM, respectively. Our fluorescence experiment revealed that Q1 could interact with the substrates of tyrosine and L-DOPA in addition to tyrosinase. Molecular docking studies showed that the binding of Q1 to tyrosinase was driven by hydrogen bonding and hydrophobicity. Briefly, the current study confirmed a new tyrosinase inhibitor, which is expected to be developed into a novel pigmentation drug.
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A systematic exploration reveals the potential of spermidine for hypopigmentation treatment through the stabilization of melanogenesis-associated proteins. Sci Rep 2022; 12:14478. [PMID: 36008447 PMCID: PMC9411574 DOI: 10.1038/s41598-022-18629-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 08/16/2022] [Indexed: 11/08/2022] Open
Abstract
Spermidine (SPD), a polyamine naturally present in living organisms, is known to prolong the lifespan of animals. In this study, the role of SPD in melanogenesis was investigated, showing potential as a pigmenting agent. SPD treatment increased melanin production in melanocytes in a dose dependent manner. Computational analysis with RNA-sequencing data revealed the alteration of protein degradation by SPD treatment without changes in the expressions of melanogenesis-related genes. Indeed, SPD treatment significantly increased the stabilities of tyrosinase-related protein (TRP)-1 and -2 while inhibiting ubiquitination, which was confirmed by treatment of proteasome inhibitor MG132. Inhibition of protein synthesis by cycloheximide (CHX) showed that SPD treatment increased the resistance of TRP-1 and TRP-2 to protein degradation. To identify the proteins involved in SPD transportation in melanocytes, the expression of several solute carrier (SLC) membrane transporters was assessed and, among 27 transporter genes, SLC3A2, SLC7A1, SLC18B1, and SLC22A18 were highly expressed, implying they are putative SPD transporters in melanocytes. Furthermore, SLC7A1 and SLC22A18 were downregulated by SPD treatment, indicating their active involvement in polyamine homeostasis. Finally, we applied SPD to a human skin equivalent and observed elevated melanin production. Our results identify SPD as a potential natural product to alleviate hypopigmentation.
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35
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Chemical Permeation Enhancers for Topically-Applied Vitamin C and Its Derivatives: A Systematic Review. COSMETICS 2022. [DOI: 10.3390/cosmetics9040085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
This paper reports the permeation-enhancing properties and safety of different chemical permeation enhancers (CPEs) on the topical delivery of vitamin C (VC) and its derivatives. A literature search using search keywords or phrases was done in PubMed®, ScienceDirect, and MEDLINE databases. The calculated Log P (cLog P) values were referenced from PubChem and the dermal LD50 values were referenced from safety data sheets. Thirteen studies described the permeation-enhancing activity of 18 identified CPEs in the topical delivery of VC. Correlation analysis between ER and cLog P values for porcine (r = 0.114) and rabbit (r = 0.471) showed weak and moderate positive correlation, while mouse (r = −0.135), and reconstructed human epidermis (r = −0.438) had a negative correlation. The majority (n = 17) of the CPEs belonged to Category 5 of the Globally Harmonized System of Classification or low toxicity hazard. CPEs alone or in combination enhanced permeation (ER = 0.198–106.57) of VC in topical formulations. The combination of isopropyl myristate, sorbitan monolaurate, and polyoxyethylene 80 as CPEs for VC resulted in the highest permeation enhancement ratio.
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36
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Effect of Rice ( Oryza sativa L.) Ceramides Supplementation on Improving Skin Barrier Functions and Depigmentation: An Open-Label Prospective Study. Nutrients 2022; 14:nu14132737. [PMID: 35807914 PMCID: PMC9268538 DOI: 10.3390/nu14132737] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 06/17/2022] [Accepted: 06/28/2022] [Indexed: 01/27/2023] Open
Abstract
Ceramides plays a crucial role in maintaining skin barrier function. Although foregoing evidence supported beneficial effects of topical ceramides for restoration of the skin barrier, studies on oral ceramides are extremely scarce, with most published data collected from in vivo and in vitro models. Thus, this study aimed to evaluate the efficacy of rice ceramides (RC) supplementation to improve skin barrier function and as a depigmenting agent through comprehensive clinical assessments. This study investigated the beneficial effects of orally administered RC supplementation in 50 voluntary participants. Skin hydration, firmness and elasticity, transepidermal water loss (TEWL), melanin index (MI), erythema index (EI), sebum production, pH, and wrinkle severity were assessed at baseline and during monthly follow-up visits. RC supplementation was found to significantly (p < 0.01) improve skin hydration, sebum production, firmness and elasticity, and wrinkle severity for three assessed areas, namely the left cheek, dorsal neck, and right inner forearm. Additionally, RC significantly (p < 0.01) reduced the rates of TEWL, levels of MI and EI. Analyses of data indicated that participants at older age were more responsive towards the effect of RC supplementation. Our findings suggest that RC supplementation can effectively improve skin barrier function, reduce wrinkle severity, and reduce pigmentation.
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Liu Y, Gao Y, Yu Z, Zhang Y. Study on infection behavior and characteristics of poplar wood dyed by Lasiodiplodia theobromae. HOLZ ALS ROH- UND WERKSTOFF = EUROPEAN JOURNAL OF WOOD AND WOOD PRODUCTS 2022; 80:1151-1163. [PMID: 37521514 PMCID: PMC9210801 DOI: 10.1007/s00107-022-01832-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Accepted: 05/09/2022] [Indexed: 08/01/2023]
Abstract
The technology of dyeing wood by microorganisms is a kind of pollution-free and sustainable wood dyeing technology. To achieve fast and rich dyeing of Lasiodiplodia theobromae on the surface of poplar wood, tyrosinase and tricyclazole were used as induction factors in this experiment. The results showed that L. theobromae had a better induction effect in the cross-section of poplar wood and induced with tricyclazole. The surface color of poplar ranged from light yellow dyeing to gray and brown, the chromatic aberration of the cross-section of wood was above 44.5 NBS, and the infected area was over 50%, while the dyed parts of radial and tangential sections of wood were only on the surface of the wood after 30 days of infection. The induced infection of L. theobromae on poplar wood had little effect on the chemical components of poplar and had good colorfastness to washing and light. Therefore, microbial dyeing of wood showed a beneficial application prospect in the field of wood dyeing.
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Affiliation(s)
- Yuansong Liu
- College of Design and Innovation, Wenzhou Polytechnic, Wenzhou, 325035 China
- College of Materials Science and Technology, Beijing Forestry University, Beijing, 100083 China
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing, 100083 China
| | - Yunxiao Gao
- College of Materials Science and Technology, Beijing Forestry University, Beijing, 100083 China
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing, 100083 China
| | - Zhiming Yu
- College of Materials Science and Technology, Beijing Forestry University, Beijing, 100083 China
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing, 100083 China
| | - Yang Zhang
- College of Materials Science and Technology, Beijing Forestry University, Beijing, 100083 China
- Beijing Key Laboratory of Wood Science and Engineering, Beijing Forestry University, Beijing, 100083 China
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38
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Nam G, An SK, Park IC, Bae S, Lee JH. Daphnetin inhibits α-MSH-induced melanogenesis via PKA and ERK signaling pathways in B16F10 melanoma cells. Biosci Biotechnol Biochem 2022; 86:596-609. [PMID: 35325017 DOI: 10.1093/bbb/zbac016] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 01/24/2022] [Indexed: 12/18/2022]
Abstract
Daphnetin is a dehydroxylated derivative of coumarin isolated from Daphne species. However, the effect of daphnetin on melanogenesis has not been elucidated. This study aims to investigate the inhibitory effect of daphnetin on melanogenesis in α-melanocyte stimulating hormone (α-MSH)-treated B16F10 cells and its potential mechanism. Melanin content analysis and cellular tyrosinase activity assay showed that daphnetin inhibited melanin biosynthesis in α-MSH-treated B16F10 cells. Immunoblotting and qRT-PCR also indicated that daphnetin suppressed the expression of microphthalmia-associated transcription factor, a mastering transcription factor of melanogenesis and its downstream melanogenic enzymes including tyrosinase and tyrosinase-related proteins. Moreover, daphnetin downregulated the phosphorylation of PKA, ERK, MSK1, and CREB. Additionally, daphnetin inhibited melanin synthesis in UVB-irradiated HaCaT conditioned medium system suggesting that daphnetin has potential as an antipigmentation activity in a physiological skin condition. Our data propose that daphnetin inhibits melanogenesis via modulating both the PKA/CREB and the ERK/MSK1/CREB pathways.
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Affiliation(s)
- Garam Nam
- Department of Cosmetics Engineering, Konkuk University, Seoul, Republic of Korea
| | - Sung Kwan An
- Department of Cosmetics Engineering, Konkuk University, Seoul, Republic of Korea
| | - In-Chul Park
- Division of Radiation Cancer Research, Korea Institute of Radiological and Medical Sciences, Nowon-gu, Seoul, Republic of Korea
| | - Seunghee Bae
- Department of Cosmetics Engineering, Konkuk University, Seoul, Republic of Korea
| | - Jae Ho Lee
- Department of Cosmetics Engineering, Konkuk University, Seoul, Republic of Korea
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Lee S, Park HO, Yoo W. Anti-Melanogenic and Antioxidant Effects of Cell-Free Supernatant from Lactobacillus gasseri BNR17. Microorganisms 2022; 10:microorganisms10040788. [PMID: 35456838 PMCID: PMC9027439 DOI: 10.3390/microorganisms10040788] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Revised: 04/05/2022] [Accepted: 04/07/2022] [Indexed: 02/04/2023] Open
Abstract
In recent years, there has been considerable interest in the use of cell-free supernatant of probiotics culture for nutritional and functional applications. In this study, we investigated the effect of the cell-free supernatant from Lactobacillus gasseri BNR17 (CFS) on anti-melanogenesis and reducing oxidative stress in B16-F10 murine melanoma cells and HaCaT human keratinocytes. Treatment with CFS significantly inhibited the production of extracellular and intracellular melanin without cytotoxicity during melanogenesis induced by the α-MSH in B16-F10 cells. The CFS dramatically reduced tyrosinase activity and the melanogenesis-related gene expression. Further, it showed antioxidative effects in a dose-dependent manner in DPPH (2,2-diphenyl-1-picryl-hydrazyl-hydrate) assays and significantly increased the mRNA levels of HO-1 and CAT in HaCaT cells. Furthermore, the CFS increased HO-1 and anti-oxidative-related gene expression during H2O2-induced oxidative stress in HaCaT cells. Together, this study suggests that the CFS reduces hyperpigmentation and inhibits oxidative stress, and thus can be used as a potential skincare product in the future.
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Affiliation(s)
- Sol Lee
- AceBiome Inc., Seoul 06164, Korea; (S.L.); (H.-O.P.)
- R&D Center, AceBiome Inc., Daejeon 34013, Korea
| | - Han-Oh Park
- AceBiome Inc., Seoul 06164, Korea; (S.L.); (H.-O.P.)
- R&D Center, AceBiome Inc., Daejeon 34013, Korea
- siRNAgen Therapeutics, Daejeon 34302, Korea
- Bioneer Corporation, Daejeon 34302, Korea
| | - Wonbeak Yoo
- AceBiome Inc., Seoul 06164, Korea; (S.L.); (H.-O.P.)
- R&D Center, AceBiome Inc., Daejeon 34013, Korea
- Correspondence: ; Tel.: +82-42-335-6020
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40
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Bibi Sadeer N, Sinan KI, Cziáky Z, Jekő J, Zengin G, Jeewon R, Abdallah HH, AlDhaheri Y, Eid AH, Mahomoodally MF. Towards the Pharmacological Validation and Phytochemical Profiling of the Decoction and Maceration of Bruguiera gymnorhiza (L.) Lam.—A Traditionally Used Medicinal Halophyte. Molecules 2022; 27:molecules27062000. [PMID: 35335362 PMCID: PMC8951081 DOI: 10.3390/molecules27062000] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 03/17/2022] [Accepted: 03/18/2022] [Indexed: 02/04/2023] Open
Abstract
Decoctions (leaves and roots) of Bruguiera gymnorhiza (L.) Lam. are traditionally used against diabetes in many countries, including Mauritius. This study endeavoured to evaluate the inhibitory potential of leaves, roots, twigs and fruits extracts (decoction and maceration) of B. gymnorhiza against key enzymes relevant to diabetes. Considering complications related to diabetes, other clinical enzymes, namely, acetylcholinesterase (AChE), butyrylcholinesterase (BChE), tyrosinase, elastase and pancreatic lipase, were used. Identification of compounds was carried out using ultra-high-performance liquid chromatography/electrospray ionization tandem mass spectrometry (UHPLC-ESI-MS/MS). Antioxidant capacities were assessed using DPPH, ABTS, FRAP, CUPRAC, phosphomolybdenum, metal chelating. The relationship between mode of extraction, plant parts and biological activities was determined using multivariate analysis. Macerated fruits, rich in phytochemicals (phenolic, flavanol, tannin, and triterpenoid), exhibited substantially high antioxidant capacities related to radical scavenging (DPPH: 547.75 ± 10.99 and ABTS: 439.59 ± 19.13 mg TE/g, respectively) and reducing potential (CUPRAC: 956.04 ± 11.90 and FRAP: 577.26 ± 4.55 mg TE/g, respectively). Additionally, the same extract significantly depressed AChE and BChE (3.75 ± 0.03 and 2.19 ± 0.13 mg GALAE/g, respectively), tyrosinase (147.01 ± 0.78 mg KAE/g), elastase (3.14 ± 0.08 mg OE/g) and amylase (1.22 ± 0.01 mmol ACAE/g) enzymatic activities. Phytochemical results confirmed the presence of 119 compounds in all maceration and 163 compounds in all decoction samples. The screening also revealed important compounds in the extracts, namely, quinic acid, brugierol, bruguierol A, epigallocatechin, chlorogenic acid, to name a few. Multivariate analysis reported that the plant parts of B. gymnorhiza greatly influenced the observed biological activities in contrast to the types of extraction methods employed. Docking calculations have supported the findings of the experimental part through the high binding affinity and strong interactions of some compounds against tyrosinase, AChE, BChE and elastase enzymes. The decocted root and leaf of B. gymnorhiza showed low to moderate antidiabetic activity, thereby partially supporting its traditional uses in the management of diabetes. However, the fruit, the most active organ, can be used as a diet supplement to reduce the risk of diabetes complications after evaluating its cytotoxic effects.
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Affiliation(s)
- Nabeelah Bibi Sadeer
- Department of Health Sciences, Faculty of Medicine and Health Sciences, University of Mauritius, Réduit 230, Mauritius; (N.B.S.); (R.J.)
| | | | - Zoltán Cziáky
- Agricultural and Molecular Research and Service Institute, University of Nyíregyháza, 001 Nyíregyháza, Hungary; (Z.C.); (J.J.)
| | - József Jekő
- Agricultural and Molecular Research and Service Institute, University of Nyíregyháza, 001 Nyíregyháza, Hungary; (Z.C.); (J.J.)
| | - Gokhan Zengin
- Department of Biology, Science Faculty, Selcuk University, Konya 42130, Turkey;
- Correspondence: (G.Z.); (A.H.E.); (M.F.M.)
| | - Rajesh Jeewon
- Department of Health Sciences, Faculty of Medicine and Health Sciences, University of Mauritius, Réduit 230, Mauritius; (N.B.S.); (R.J.)
| | - Hassan H. Abdallah
- Chemistry Department, College of Education, Salahaddin University-Erbil, Erbil 44001, Iraq;
| | - Yusra AlDhaheri
- Department of Biology, College of Science, United Arab Emirates University, Al Ain P.O. Box 15551, United Arab Emirates;
| | - Ali H. Eid
- Department of Basic Medical Sciences, College of Medicine, QU Health, Qatar University, Doha 2713, Qatar
- Correspondence: (G.Z.); (A.H.E.); (M.F.M.)
| | - Mohamad Fawzi Mahomoodally
- Department of Health Sciences, Faculty of Medicine and Health Sciences, University of Mauritius, Réduit 230, Mauritius; (N.B.S.); (R.J.)
- Correspondence: (G.Z.); (A.H.E.); (M.F.M.)
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Nanoliposome Use to Improve the Stability of Phenylethyl Resorcinol and Serve as a Skin Penetration Enhancer for Skin Whitening. COATINGS 2022. [DOI: 10.3390/coatings12030362] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Phenylethyl resorcinol (PR) is a potent tyrosinase inhibitor and a cosmeceutical skin lightening agent. However, the application of PR is limited by photoinstability and poor solubility. In this study, we formulated and optimized phenylethyl resorcinol loaded nanoliposomes (PR-NLPs) to improve the stability and effective delivery of PR. PR-NLPs were prepared by the ethanol injection method and optimized by a single factor experimental and Box–Behnken design. In addition, Diethylamino Hydroxybenzoyl Hexyl Benzoate (DHHB) as the UBA absorber was added to PR-NLPs, which significantly improved the photostability of PR. The mean size, polydispersity index (PDI), and zeta potential of the optimized PR-NLPs were 130.1 ± 3.54 nm, 0.225 ± 0.02, and −43.9 ± 3.44 mV, respectively. The drug encapsulation efficiency (EE) and loading efficiency (LC) of PR-NLPs were 96.81 ± 3.46% and 8.82 ± 0.6%, respectively. These PR-NLPs showed good physicochemical stability for 3 months at 4 °C and 25 °C in the dark. They showed typical sustained and prolonged drug-release behavior in vitro. The in vitro cytotoxicity assay and cellular uptake demonstrated that the PR-NLPs had excellent biocompatibility and cell transport ability. It significantly inhibited tyrosinase activity and reduced melanin production in B16F10 cells at concentrations of 20 or 30 μg/mL. Moreover, the PR-NLPs enhanced the PR into the skin. These results indicate that PR-NLPs can be used as a nanocarrier to improve the transdermal delivery of PR.
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Mitofusin-2 Negatively Regulates Melanogenesis by Modulating Mitochondrial ROS Generation. Cells 2022; 11:cells11040701. [PMID: 35203350 PMCID: PMC8869806 DOI: 10.3390/cells11040701] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Revised: 02/02/2022] [Accepted: 02/04/2022] [Indexed: 11/17/2022] Open
Abstract
Inter-organellar communication is emerging as one of the most crucial regulators of cellular physiology. One of the key regulators of inter-organellar communication is Mitofusin-2 (MFN2). MFN2 is also involved in mediating mitochondrial fusion–fission dynamics. Further, it facilitates mitochondrial crosstalk with the endoplasmic reticulum, lysosomes and melanosomes, which are lysosome-related organelles specialized in melanin synthesis within melanocytes. However, the role of MFN2 in regulating melanocyte-specific cellular function, i.e., melanogenesis, remains poorly understood. Here, using a B16 mouse melanoma cell line and primary human melanocytes, we report that MFN2 negatively regulates melanogenesis. Both the transient and stable knockdown of MFN2 leads to enhanced melanogenesis, which is associated with an increase in the number of mature (stage III and IV) melanosomes and the augmented expression of key melanogenic enzymes. Further, the ectopic expression of MFN2 in MFN2-silenced cells leads to the complete rescue of the phenotype at the cellular and molecular levels. Mechanistically, MFN2-silencing elevates mitochondrial reactive-oxygen-species (ROS) levels which in turn increases melanogenesis. ROS quenching with the antioxidant N-acetyl cysteine (NAC) reverses the MFN2-knockdown-mediated increase in melanogenesis. Moreover, MFN2 expression is significantly lower in the darkly pigmented primary human melanocytes in comparison to lightly pigmented melanocytes, highlighting a potential contribution of lower MFN2 levels to higher physiological pigmentation. Taken together, our work establishes MFN2 as a novel negative regulator of melanogenesis.
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Guo ZL, Li MX, Li XL, Wang P, Wang WG, Du WZ, Yang ZQ, Chen SF, Wu D, Tian XY. Crocetin: A Systematic Review. Front Pharmacol 2022; 12:745683. [PMID: 35095483 PMCID: PMC8795768 DOI: 10.3389/fphar.2021.745683] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 12/14/2021] [Indexed: 11/25/2022] Open
Abstract
Crocetin is an aglycone of crocin naturally occurring in saffron and produced in biological systems by hydrolysis of crocin as a bioactive metabolite. It is known to exist in several medicinal plants, the desiccative ripe fruit of the cape jasmine belonging to the Rubiaceae family, and stigmas of the saffron plant of the Iridaceae family. According to modern pharmacological investigations, crocetin possesses cardioprotective, hepatoprotective, neuroprotective, antidepressant, antiviral, anticancer, atherosclerotic, antidiabetic, and memory-enhancing properties. Although poor bioavailability hinders therapeutic applications, derivatization and formulation preparation technologies have broadened the application prospects for crocetin. To promote the research and development of crocetin, we summarized the distribution, preparation and production, total synthesis and derivatization technology, pharmacological activity, pharmacokinetics, drug safety, drug formulations, and preparation of crocetin.
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Affiliation(s)
- Zi-Liang Guo
- Department of Clinical Pharmacy, The 940th Hospital of Joint Logistic Support Force of Chinese of PLA, Gansu Plateau Pharmaceutical Technology Center, Lanzhou, China.,College of Pharmacy, Lanzhou University, Lanzhou, China
| | - Mao-Xing Li
- Department of Clinical Pharmacy, The 940th Hospital of Joint Logistic Support Force of Chinese of PLA, Gansu Plateau Pharmaceutical Technology Center, Lanzhou, China.,College of Pharmacy, Lanzhou University, Lanzhou, China.,College of Pharmacy, Gansu University of Chinese Medicine, Lanzhou, China
| | - Xiao-Lin Li
- Department of Clinical Pharmacy, The 940th Hospital of Joint Logistic Support Force of Chinese of PLA, Gansu Plateau Pharmaceutical Technology Center, Lanzhou, China
| | - Peng Wang
- Department of Clinical Pharmacy, The 940th Hospital of Joint Logistic Support Force of Chinese of PLA, Gansu Plateau Pharmaceutical Technology Center, Lanzhou, China.,College of Pharmacy, Gansu University of Chinese Medicine, Lanzhou, China
| | - Wei-Gang Wang
- Department of Clinical Pharmacy, The 940th Hospital of Joint Logistic Support Force of Chinese of PLA, Gansu Plateau Pharmaceutical Technology Center, Lanzhou, China.,College of Pharmacy, Gansu University of Chinese Medicine, Lanzhou, China
| | - Wei-Ze Du
- Department of Clinical Pharmacy, The 940th Hospital of Joint Logistic Support Force of Chinese of PLA, Gansu Plateau Pharmaceutical Technology Center, Lanzhou, China.,College of Pharmacy, Gansu University of Chinese Medicine, Lanzhou, China
| | - Zhi-Qiang Yang
- Department of Clinical Pharmacy, The 940th Hospital of Joint Logistic Support Force of Chinese of PLA, Gansu Plateau Pharmaceutical Technology Center, Lanzhou, China.,Institute of Chemical Technology, Northwest Minzu University, Lanzhou, China
| | - Sheng-Fu Chen
- Department of Clinical Pharmacy, The 940th Hospital of Joint Logistic Support Force of Chinese of PLA, Gansu Plateau Pharmaceutical Technology Center, Lanzhou, China.,College of Pharmacy, Gansu University of Chinese Medicine, Lanzhou, China
| | - Di Wu
- Department of Clinical Pharmacy, The 940th Hospital of Joint Logistic Support Force of Chinese of PLA, Gansu Plateau Pharmaceutical Technology Center, Lanzhou, China.,College of Pharmacy, Ningxia Medical University, Yinchuan, China
| | - Xiu-Yu Tian
- Department of Clinical Pharmacy, The 940th Hospital of Joint Logistic Support Force of Chinese of PLA, Gansu Plateau Pharmaceutical Technology Center, Lanzhou, China.,College of Pharmacy, Lanzhou University, Lanzhou, China
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44
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Sawutdeechaikul P, Kanokrungsee S, Sahaspot T, Thadvibun K, Banlunara W, Limcharoen B, Sansureerungsikul T, Rutwaree T, Oungeun M, Wanichwecharungruang S. Detachable dissolvable microneedles: intra-epidermal and intradermal diffusion, effect on skin surface, and application in hyperpigmentation treatment. Sci Rep 2021; 11:24114. [PMID: 34916571 PMCID: PMC8677736 DOI: 10.1038/s41598-021-03503-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 11/10/2021] [Indexed: 01/04/2023] Open
Abstract
Delivering bioactive compounds into skin tissue has long been a challenge. Using ex vivo porcine and rat skins, here we demonstrate that a detachable dissolvable microneedle (DDMN) array, a special dissolvable microneedle that allows needle detachment from the base within 2 min post administration, can effectively embed a model compound into epidermis and dermis. Diffusion of the compound from the needle embedding sites to the nearby skin tissue is demonstrated at various post administration periods. The relationship between the time that a conventional dissolvable microneedle array is left on skin without needle detachment from the base and the degree of skin surface abrasion at each microneedle penetration spot is also demonstrated on skin of human volunteers. Co-loading glutathione with vitamin C (vitC) can stabilize vitC in the DDMN. DDMN loaded with vitC and glutathione can help erasing post-acne-hyperpigmentation spots.
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Affiliation(s)
| | - Silada Kanokrungsee
- Faculty of Medicine, Skin Center, Srinakharinwirot University, Bangkok, Thailand
| | - Thanyapat Sahaspot
- Faculty of Medicine, Skin Center, Srinakharinwirot University, Bangkok, Thailand
| | - Kamonwan Thadvibun
- Faculty of Medicine, Skin Center, Srinakharinwirot University, Bangkok, Thailand
| | - Wijit Banlunara
- Department of Pathology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
- Center of Excellence in Materials and Bio-Interfaces, Chulalongkorn University, Bangkok, Thailand
| | - Benchaphorn Limcharoen
- Department of Anatomy, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
- Center of Excellence in Materials and Bio-Interfaces, Chulalongkorn University, Bangkok, Thailand
| | | | - Teeranut Rutwaree
- Mineed Technology, 142 Innovation Cluster 2, Thailand Science Park, Pathum Thani, Thailand
| | - Miranda Oungeun
- Department of Petrochemistry and Polymer Science, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Supason Wanichwecharungruang
- Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand.
- Center of Excellence in Materials and Bio-Interfaces, Chulalongkorn University, Bangkok, Thailand.
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45
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Zhang JZ, Abudoureyimu D, Wang M, Yu SR, Kang XJ. Association between celiac disease and vitiligo: A review of the literature. World J Clin Cases 2021; 9:10430-10437. [PMID: 35004975 PMCID: PMC8686139 DOI: 10.12998/wjcc.v9.i34.10430] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Revised: 06/25/2021] [Accepted: 10/20/2021] [Indexed: 02/06/2023] Open
Abstract
Celiac disease (CD) is an autoimmune intestinal disease caused by the intake of gluten-containing cereals and their products by individuals with genetic susceptibility genes. Vitiligo is a commonly acquired depigmentation of the skin; its clinical manifestation are skin patches caused by localized or generalized melanin deficiency. Both diseases have similar global incidence rates (approximately 1%) and are associated to similar diseases, including autoimmune bullous disease, inflammatory bowel disease, autoimmune thyroiditis, autoimmune gastritis, and type 1 diabetes. The relationship between CD and vitiligo has been reported in several studies, but their conclusions are inconsistent. Further, it has also been reported that a gluten-free diet (GFD) can improve the symptoms of immune-related skin diseases such as vitiligo. In this mini-review, we summarize and review the literature on the relationship between CD and vitiligo, assess the therapeutic significance of GFD for patients with vitiligo, and explore their possible physiopathology. We are hopeful that the information summarized here will assist physicians who treat patients with CD or vitiligo, thereby improving the prognosis.
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Affiliation(s)
- Jing-Zhan Zhang
- Department of Dermatology, People’s Hospital of Xinjiang Uygur Autonomous Region, Xinjiang Key Laboratory of Dermatology Research, Urumqi 830001, Xinjiang Uygur Autonomous Region, China
| | - Dilinuer Abudoureyimu
- Department of Dermatology, People’s Hospital of Xinjiang Uygur Autonomous Region, Xinjiang Key Laboratory of Dermatology Research, Urumqi 830001, Xinjiang Uygur Autonomous Region, China
| | - Man Wang
- Department of Gastroenterology, People’s Hospital of Xinjiang Uygur Autonomous Region, Urumqi 830001, Xinjiang Uygur Autonomous Region, China
| | - Shi-Rong Yu
- Department of Dermatology, People’s Hospital of Xinjiang Uygur Autonomous Region, Xinjiang Key Laboratory of Dermatology Research, Urumqi 830001, Xinjiang Uygur Autonomous Region, China
| | - Xiao-Jing Kang
- Department of Dermatology, People’s Hospital of Xinjiang Uygur Autonomous Region, Xinjiang Key Laboratory of Dermatology Research, Urumqi 830001, Xinjiang Uygur Autonomous Region, China
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46
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Kim JK, Heo HY, Park S, Kim H, Oh JJ, Sohn EH, Jung SH, Lee K. Characterization of Phenethyl Cinnamamide Compounds from Hemp Seed and Determination of Their Melanogenesis Inhibitory Activity. ACS OMEGA 2021; 6:31945-31954. [PMID: 34870017 PMCID: PMC8637947 DOI: 10.1021/acsomega.1c04727] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Accepted: 10/06/2021] [Indexed: 06/13/2023]
Abstract
Hyperpigmentation is induced by the overactivation of tyrosinase, which is a rate-limiting enzyme in melanogenesis. The defatted extract of hemp (Cannabis sativa L.) seed is known to have inhibitory effects on melanogenesis; however, effective compounds in the extract have not been identified yet. In this study, three phenethyl cinnamamides present in hemp seed extract were prepared by purification and chemical synthesis and were assessed for their inhibitory effect on melanogenesis in B16F10 melanoma cells. A comparison of the anti-melanogenesis and anti-tyrosinase activity of hemp seed solvent fractions revealed that the ethyl acetate fraction possessed the greatest potential for suppressing melanogenesis in melanoma cells by decreasing tyrosinase activity. We tentatively identified 26 compounds in the ethyl acetate fraction by comparing spectroscopic data with the literature. Three phenethyl cinnamamides such as N-trans-caffeoyltyramine, N-trans-coumaroyltyramine, and N-trans-feruloyltyramine present abundantly in the ethyl acetate fraction were prepared and their anti-melanogenesis and anti-tyrosinase activities in melanoma cells were evaluated. We found that N-trans-caffeoyltyramine and N-trans-feruloyltyramine inhibited alpha melanocyte stimulating hormone (α-MSH)-induced melanogenesis without cytotoxicity, while N-trans-coumaroyltyramine inhibited melanogenesis with cytotoxicity. IC50 values of N-trans-caffeoyltyramine, N-trans-feruloyltyramine, and N-trans-coumaroyltyramine for inhibition of α-MSH-mediated tyrosinase activation were 0.8, 20.2, and 6.3 μM, respectively. Overall, N-trans-caffeoyltyramine possessed the strongest anti-melanogenesis activity among the three phenethyl cinnamamides evaluated. The inhibitory effect of N-trans-caffeoyltyramine was verified by determining the melanin content and tyrosinase activity in melanoma after treating the cells with synthetic compounds. Thus, N-trans-caffeoyltyramine isolated from hemp seed extract could be useful in cosmetics as a skin-whitening agent.
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Affiliation(s)
- Jae Kwon Kim
- Department
of Bio-Health Technology, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Hee-Young Heo
- Department
of Bio-Health Technology, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - SeonJu Park
- Chuncheon
Center, Korea Basic Science Institute (KBSI), Chuncheon 24341, Republic of Korea
| | - Haheon Kim
- Department
of Bio-Health Technology, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Jeong Ju Oh
- Department
of Bio-Health Technology, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
| | - Eun-Hwa Sohn
- Department
of Herbal Medicine Resource, Institute of Bioscience and Biotechnology, Kangwon National University, Samcheok 25949, Republic of Korea
| | - Se-Hui Jung
- Department
of Bio-Health Technology, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
- Research
Institute, K-medichem Co., Ltd., Chuncheon 24341, Republic of Korea
| | - Kooyeon Lee
- Department
of Bio-Health Technology, College of Biomedical Science, Kangwon National University, Chuncheon 24341, Republic of Korea
- Research
Institute, K-medichem Co., Ltd., Chuncheon 24341, Republic of Korea
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47
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de Armas-Ricard M, Quinán-Cárdenas F, Sanhueza H, Pérez-Vidal R, Mayorga-Lobos C, Ramírez-Rodríguez O. Phytochemical Screening and Antioxidant Activity of Seven Native Species Growing in the Forests of Southern Chilean Patagonia. Molecules 2021; 26:6722. [PMID: 34771130 PMCID: PMC8587661 DOI: 10.3390/molecules26216722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 10/29/2021] [Accepted: 10/31/2021] [Indexed: 11/17/2022] Open
Abstract
The genus Nothofagus is one of the most abundant in the subantarctic Patagonian forests. Five species inhabit these ecosystems, three evergreen (Nothofagus betuloides, Nothofagus dombeyi, and Nothofagus nitida) and two deciduous (Nothofagus pumilio and Nothofagus antarctica). This is the first report on the levels of secondary metabolites and the antioxidant capacity of Patagonian tree species growing in natural environments. The aim of this work was to carry out a phytochemical screening, to determine the antioxidant capacity, the sun protection factor, and the α-glucosidase and tyrosinase inhibitory activity of foliar extracts of the five previous species. Besides, Aristotelia chilensis and Berberis microphylla, two species of Patagonian shrubs growing in the same forests, were used as reference. N. dombeyi was the Nothofagus with the best antioxidant capacity. B. microphylla differed from all studied species. Moreover, the Nothofagus was split into two groups. N. betuloides and N. dombeyi are the most similar species to A. chilensis. The α-glucosidase was completely inhibited by all studied extracts. Furthermore, N. antarctica, N.pumilio, and N. nitida inhibited about 70% of the tyrosinase activity. All the results found in this study for the species of the genus Nothofagus support further research on their potential beneficial properties for human health.
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Affiliation(s)
- Merly de Armas-Ricard
- Laboratory of Chemistry and Biochemistry, Campus Lillo, University of Aysén. Eusebio Lillo 667, Coyhaique 5951537, Chile; (F.Q.-C.); (H.S.); (R.P.-V.); (C.M.-L.)
- Campus Patagonia, Universidad Austral de Chile, Camino a Coyhaique Alto Km. 4, Coyhaique 5950000, Chile
| | - Francisco Quinán-Cárdenas
- Laboratory of Chemistry and Biochemistry, Campus Lillo, University of Aysén. Eusebio Lillo 667, Coyhaique 5951537, Chile; (F.Q.-C.); (H.S.); (R.P.-V.); (C.M.-L.)
- Faculty of Sciences, University of Chile, Las Palmeras 3425, Santiago 7800003, Chile
| | - Harold Sanhueza
- Laboratory of Chemistry and Biochemistry, Campus Lillo, University of Aysén. Eusebio Lillo 667, Coyhaique 5951537, Chile; (F.Q.-C.); (H.S.); (R.P.-V.); (C.M.-L.)
| | - Rodrigo Pérez-Vidal
- Laboratory of Chemistry and Biochemistry, Campus Lillo, University of Aysén. Eusebio Lillo 667, Coyhaique 5951537, Chile; (F.Q.-C.); (H.S.); (R.P.-V.); (C.M.-L.)
| | - Cristina Mayorga-Lobos
- Laboratory of Chemistry and Biochemistry, Campus Lillo, University of Aysén. Eusebio Lillo 667, Coyhaique 5951537, Chile; (F.Q.-C.); (H.S.); (R.P.-V.); (C.M.-L.)
- Faculty of Chemical and Pharmaceutical Sciences, University of Chile, Santos Dumont 964, Santiago 8380494, Chile
| | - Oney Ramírez-Rodríguez
- Laboratory of Chemistry and Biochemistry, Campus Lillo, University of Aysén. Eusebio Lillo 667, Coyhaique 5951537, Chile; (F.Q.-C.); (H.S.); (R.P.-V.); (C.M.-L.)
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48
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Jian H, Zu P, Rao Y, Li W, Mou T, Lin J, Zhang F. Comparative analysis of melanin deposition between Chishui silky fowl and Taihe silky fowl. JOURNAL OF APPLIED ANIMAL RESEARCH 2021. [DOI: 10.1080/09712119.2021.1981911] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Huafeng Jian
- Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region, The Ministry of Education, Guizhou University, Guiyang, People’s Republic of China
- Guizhou Province Key Laboratory of Animal Genetics, Breeding and Reproduction, College of Animal Science, Guizhou University, Guiyang, People’s Republic of China
- Research Institute of Poultry, Guizhou University, Guiyang, People’s Republic of China
- Guizhou University Science and Research Poultry Farm, Guiyang, People’s Republic of China
| | - Panyu Zu
- Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region, The Ministry of Education, Guizhou University, Guiyang, People’s Republic of China
- Guizhou Province Key Laboratory of Animal Genetics, Breeding and Reproduction, College of Animal Science, Guizhou University, Guiyang, People’s Republic of China
- Research Institute of Poultry, Guizhou University, Guiyang, People’s Republic of China
- Guizhou University Science and Research Poultry Farm, Guiyang, People’s Republic of China
| | - Yongchao Rao
- Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region, The Ministry of Education, Guizhou University, Guiyang, People’s Republic of China
- Guizhou Province Key Laboratory of Animal Genetics, Breeding and Reproduction, College of Animal Science, Guizhou University, Guiyang, People’s Republic of China
- Research Institute of Poultry, Guizhou University, Guiyang, People’s Republic of China
- Guizhou University Science and Research Poultry Farm, Guiyang, People’s Republic of China
| | - Wei Li
- Guizhou Province Management Station of Livestock Genetic Resources, Guiyang, People’s Republic of China
| | - Tenghui Mou
- Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region, The Ministry of Education, Guizhou University, Guiyang, People’s Republic of China
- Guizhou Province Key Laboratory of Animal Genetics, Breeding and Reproduction, College of Animal Science, Guizhou University, Guiyang, People’s Republic of China
- Research Institute of Poultry, Guizhou University, Guiyang, People’s Republic of China
- Guizhou University Science and Research Poultry Farm, Guiyang, People’s Republic of China
| | - Jiadong Lin
- Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region, The Ministry of Education, Guizhou University, Guiyang, People’s Republic of China
- Guizhou Province Key Laboratory of Animal Genetics, Breeding and Reproduction, College of Animal Science, Guizhou University, Guiyang, People’s Republic of China
- Research Institute of Poultry, Guizhou University, Guiyang, People’s Republic of China
- Guizhou University Science and Research Poultry Farm, Guiyang, People’s Republic of China
| | - Fuping Zhang
- Key Laboratory of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region, The Ministry of Education, Guizhou University, Guiyang, People’s Republic of China
- Guizhou Province Key Laboratory of Animal Genetics, Breeding and Reproduction, College of Animal Science, Guizhou University, Guiyang, People’s Republic of China
- Research Institute of Poultry, Guizhou University, Guiyang, People’s Republic of China
- Guizhou University Science and Research Poultry Farm, Guiyang, People’s Republic of China
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49
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Hinokitiol-induced decreases of tyrosinase and microphthalmia-associated transcription factor are mediated by the endoplasmic reticulum-associated degradation pathway in human melanoma cells. Biochimie 2021; 192:13-21. [PMID: 34536557 DOI: 10.1016/j.biochi.2021.09.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 09/08/2021] [Accepted: 09/09/2021] [Indexed: 01/23/2023]
Abstract
Tyrosinase (TYR) is a key enzyme for melanin production. We previously showed that hinokitiol, a naturally occurring seven-membered ring terpenoid, potently inhibits human TYR activity. Interestingly, hinokitiol was recently reported to decrease expression of TYR and microphthalmia-associated transcription factor (MITF), which is a main transcription factor of the TYR gene, in murine melanoma cells. However, the mechanisms by which hinokitiol decreases the intracellular levels of TYR and MITF have not been fully elucidated. Here, we investigated the underlying mechanisms of the decreases using cultured human melanoma cells. As a result, hinokitiol treatment decreased TYR protein level in a time- and dose-dependent manner in G361 human melanoma cells, while MITF protein level was decreased only at higher concentrations after 3 days treatment. Notably, the mRNA levels of TYR and MITF were slightly increased by hinokitiol treatment. Therefore, we focused on the degradation of TYR and MITF in endoplasmic reticulum (ER)-associated protein degradation (ERAD) pathway. Importantly, co-treatment of ERAD inhibitor with hinokitiol restored the protein levels of TYR and MITF to approximately 30% and 20% of total those in untreated control cells, respectively. Hinokitiol affected the ER homeostasis as well as degradation of TYR and MITF in two human melanoma cell lines, G361 and HT-144, but the changes of ER-stress markers under the hinokitiol treatment were different in the two human melanoma cell lines. Taken together, these observations indicate that hinokitiol may induce ER stress and trigger the degradation of unfolded newly synthesizing TYR and MITF via the ERAD pathway.
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50
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Meyer CE, Schoenenberger CA, Wehr RP, Wu D, Palivan CG. Artificial Melanogenesis by Confining Melanin/Polydopamine Production inside Polymersomes. Macromol Biosci 2021; 21:e2100249. [PMID: 34510748 DOI: 10.1002/mabi.202100249] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 08/09/2021] [Indexed: 11/08/2022]
Abstract
Melanin and polydopamine are potent biopolymers for the development of biomedical nanosystems. However, applications of melanin or polydopamine-based nanoparticles are limited by drawbacks related to a compromised colloidal stability over long time periods and associated cytotoxicity. To overcome these hurdles, a novel strategy is proposed that mimics the confinement of natural melanin in melanosomes. Melanosome mimics are developed by co-encapsulating the melanin/polydopamine precursors L-DOPA/dopamine with melanogenic enzyme Tyrosinase within polymersomes. The conditions of polymersome formation are optimized to obtain melanin/polydopamine polymerization within the cavity of the polymersomes. Similar to native melanosomes, polymersomes containing melanin/polydopamine show long-term colloidal stability, cell-compatibility, and potential for cell photoprotection. This novel kind of artificial melanogenesis is expected to inspire new applications of the confined melanin/polydopamine biopolymers.
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Affiliation(s)
- Claire E Meyer
- Department of Chemistry, University of Basel, Mattenstrasse 24a, Basel, 4002, Switzerland
| | - Cora-Ann Schoenenberger
- Department of Chemistry, University of Basel, Mattenstrasse 24a, Basel, 4002, Switzerland.,NCCR-Molecular Systems Engineering, BPR1095, Basel, 4058, Switzerland
| | - Riccardo P Wehr
- Department of Chemistry, University of Basel, Mattenstrasse 24a, Basel, 4002, Switzerland
| | - Dalin Wu
- Department of Chemistry, University of Basel, Mattenstrasse 24a, Basel, 4002, Switzerland.,NCCR-Molecular Systems Engineering, BPR1095, Basel, 4058, Switzerland
| | - Cornelia G Palivan
- Department of Chemistry, University of Basel, Mattenstrasse 24a, Basel, 4002, Switzerland.,NCCR-Molecular Systems Engineering, BPR1095, Basel, 4058, Switzerland
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