1
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Zhao P, He XB, Chen XY, Li ZL, Xing WJ, Liu W, Ren C, Han XD, Guo B. Celastrol inhibits mouse B16-F10 melanoma cell survival by regulating the PI3K/AKT/mTOR signaling pathway and repressing HIF-1α expression. Discov Oncol 2024; 15:178. [PMID: 38771435 PMCID: PMC11109042 DOI: 10.1007/s12672-024-01045-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 05/20/2024] [Indexed: 05/22/2024] Open
Abstract
OBJECTIVE Melanoma, with its high degree of malignancy, stands as one of the most dangerous skin cancers and remains the primary cause of death from skin cancer. With studies demonstrating the potential of traditional Chinese medicine to intervene and treat melanoma, we turned our attention to celastrol. Celastrol is a triterpene compound extracted from the traditional Chinese medicine derived from Tripterygium wilfordii. Previous studies have shown that celastrol exerts inhibitory effects on various malignant tumors, including melanoma. Hence, our goal was to clarify the impact of celastrol on cell viability, apoptosis, and cell cycle progression by elucidating its effects on the PI3K/AKT/mTOR pathway. METHODS CCK-8 and wound healing assays were used to determine the effect of celastrol on the viability and migration of B16-F10 cells. Changes in cell apoptosis, cell cycle, reactive oxygen species (ROS), and mitochondrial membrane potential were detected by flow cytometry. PI3K/AKT/mTOR pathway proteins and HIF-α mRNA expression in B16-F10 cells were detected by western blotting and qPCR. Moreover, the addition of a PI3K activator demonstrated that celastrol could inhibit the function of B16-F10 cells via the PI3K/AKT/mTOR pathway. RESULTS Celastrol inhibited the viability and migration of B16-F10 cells. Through the inhibition of the PI3K/AKT/mTOR pathway down-regulates the expression of HIF-α mRNA, thereby causing an increase of ROS in cells and a decrease in the mitochondrial membrane potential to promote cell apoptosis and cell cycle arrest. The inhibitory effect of celastrol on B16-F10 cells was further demonstrated by co-culturing with a PI3K activator. CONCLUSION Celastrol inhibits the function of B16-F10 cells by inhibiting the PI3K/AKT/mTOR cellular pathway and regulating the expression of downstream HIF-α mRNA.
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Affiliation(s)
- Ping Zhao
- Medical College of Optometry and Ophthalmology, Shandong University of Traditional Chinese Medicine, Jinan, 250000, China
| | - Xing-Bo He
- Medical College of Optometry and Ophthalmology, Shandong University of Traditional Chinese Medicine, Jinan, 250000, China
| | - Xin-Yue Chen
- Medical College of Optometry and Ophthalmology, Shandong University of Traditional Chinese Medicine, Jinan, 250000, China
| | - Zhang-Long Li
- Medical College of Optometry and Ophthalmology, Shandong University of Traditional Chinese Medicine, Jinan, 250000, China
| | - Wen-Jia Xing
- Medical College of Optometry and Ophthalmology, Shandong University of Traditional Chinese Medicine, Jinan, 250000, China
| | - Wei Liu
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, 250000, China
| | - Cong Ren
- Medical College of Optometry and Ophthalmology, Shandong University of Traditional Chinese Medicine, Jinan, 250000, China
| | - Xu-Dong Han
- School of Medicine, Southeast University, Nanjing, 210000, China.
| | - Bin Guo
- Medical College of Optometry and Ophthalmology, Shandong University of Traditional Chinese Medicine, Jinan, 250000, China.
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Rashwan AM, El-Gendy SAA, Ez Elarab SM, Alsafy MAM. A comprehensive exploration of diverse skin cell types in the limb of the desert tortoise (Testudo graeca) through light, transmission, scanning electron microscopy, and immunofluorescence techniques. Tissue Cell 2024; 87:102335. [PMID: 38412578 DOI: 10.1016/j.tice.2024.102335] [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: 01/06/2024] [Revised: 02/18/2024] [Accepted: 02/20/2024] [Indexed: 02/29/2024]
Abstract
The Greek tortoise, inhabiting harsh desert environments, provides a compelling case for investigating skin adaptations to extreme conditions. We have utilized light microscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and immunofluorescence analysis to describe the structure of the arid-adapted limb skin in the Greek tortoise. Our aim was to identify the cell types that reflect the skin adaptation of this tortoise to arid conditions. Utilizing seven antibodies, we localized and elucidated the functions of various skin cells, shedding light on how the tortoise adapts to adverse environmental conditions. Our findings unveiled numerous scales on the limbs, varying in size and color, acting as protective armor against abrasions, bites, and other potential threats in their rocky habitats. The epidermis comprises four layers: stratum basalis, stratum spinosum, peri-corneous layer, and stratum corneum. Cytokeratin 14 (CK14) was explicitly detected in the basal layer of the epidermis, suggesting a role in maintaining epidermal integrity and cellular function. Langerhans cells were observed between epidermal cells filled with ribosomes and Birbeck granules. Numerous dendritic-shaped Langerhans cells revealed through E-Cadherin signify strong immunity in tortoises' skin. Melanophores were identified using the Melan-A antibody, labeling the cytoplasm, and the SOX10 antibody, labeling the nucleus, providing comprehensive insights into melanophores morphology and distribution. Two types of melanophores were found: dendritic below the stratum basalis of the epidermis and clustered oval melanophores in the deep dermal layer. Varied melanophores distribution resulted in a spotted skin pattern, potentially offering adaptive camouflage and protection against environmental challenges. Numerous myofibroblasts were discerned through alpha-smooth actin (α-SMA) expression, indicating that the Greek tortoise's skin possesses a robust tissue repair and remodeling capacity. B-cell lymphocytes detected via CD20 immunostaining exhibited sporadic distribution in the dermis, concentrating in lymphoid aggregates and around vessels, implying potential roles in local immune responses and inflammation modulation. Employing Tom20 to identify skin cells with abundant mitochondria revealed a notable presence in melanophores and the basal layer of the epidermis, suggesting high metabolic activity in these cell types and potentially influencing cellular functions. These findings contribute to our comprehension of tortoise skin anatomy and physiology, offering insights into the remarkable adaptations of this species finely tuned to their specific environmental habitats.
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Affiliation(s)
- Ahmed M Rashwan
- Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Damanhour University, Damanhour 22511 Egypt; Department of Life Science Frontiers, Center for iPS Cell Research and Application, Kyoto University, 53 Kawahara-cho, Shogoin, Sakyo-ku, Kyoto 606-8507, Japan
| | - Samir A A El-Gendy
- Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Alexandria University, Alexandria 21944, Egypt
| | - Samar M Ez Elarab
- Department of Histology and Cytology, Faculty of Veterinary Medicine, Alexandria University, Alexandria 21944, Egypt
| | - Mohamed A M Alsafy
- Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Alexandria University, Alexandria 21944, Egypt.
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3
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Agüera-Lorente A, Alonso-Pardavila A, Larrinaga M, Boyano MD, González E, Falcón-Pérez JM, Asumendi A, Apraiz A. Small extracellular vesicle-based human melanocyte and melanoma signature. Pigment Cell Melanoma Res 2023. [PMID: 38158521 DOI: 10.1111/pcmr.13158] [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: 07/26/2023] [Revised: 11/10/2023] [Accepted: 12/12/2023] [Indexed: 01/03/2024]
Abstract
Intercellular communication is a cell-type and stimulus-dependent event driven not only by soluble factors but also by extracellular vesicles (EVs). EVs include vesicles of different size and origin that contain a myriad of molecules. Among them, small EVs (sEV; <200 nm) have been shown to modulate not just regional cell responses but also distant organ behavior. In cancer, distant organ modulation by sEVs has been associated to disease dissemination, which is one of the main concerns in melanoma. Description of broadly conserved alterations in sEV-contained molecules represents a strategy to identify key modifications in cellular communication as well as new disease biomarkers. Here, we characterize proteomes of cutaneous melanocyte and melanoma-derived sEVs to deepen on the landscape of normal and disease-related cell communication. Results reveal the presence of unique protein signatures for melanocytes and melanoma cells that reflect cellular transformation-related profound modifications. Melanocyte-derived sEVs are enriched in oxidative metabolism (e.g., aconitase 2, ACO2) or pigmentation (e.g., tyrosinase, TYR) related proteins while melanoma-derived sEVs reflect a generalized decrease in mature melanocytic markers (e.g., melanoma antigen recognized by T-cells 1, MART-1, also known as MLANA) and an increase in epithelial to mesenchymal transition (EMT)-related adhesion molecules such as tenascin C (TNC).
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Affiliation(s)
- Andrea Agüera-Lorente
- Department of Cell Biology and Histology, Faculty of Medicine and Nursing, Leioa, Spain
| | | | - María Larrinaga
- Department of Cell Biology and Histology, Faculty of Medicine and Nursing, Leioa, Spain
| | - María Dolores Boyano
- Department of Cell Biology and Histology, Faculty of Medicine and Nursing, Leioa, Spain
- Biocruces Bizkaia Health Research Institute, Barakaldo, Spain
| | - Esperanza González
- Exosomes Laboratory, Center for Cooperative Research in Biosciences, Basque Research and Technology Alliance, Derio, Spain
| | - Juan Manuel Falcón-Pérez
- Exosomes Laboratory, Center for Cooperative Research in Biosciences, Basque Research and Technology Alliance, Derio, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas, Madrid, Spain
- Metabolomics Platform, Center for Cooperative Research in Biosciences, Basque Research and Technology Alliance, Derio, Spain
- IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
| | - Aintzane Asumendi
- Department of Cell Biology and Histology, Faculty of Medicine and Nursing, Leioa, Spain
- Biocruces Bizkaia Health Research Institute, Barakaldo, Spain
| | - Aintzane Apraiz
- Department of Cell Biology and Histology, Faculty of Medicine and Nursing, Leioa, Spain
- Biocruces Bizkaia Health Research Institute, Barakaldo, Spain
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4
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Benito-Martín A, Jasiulionis MG, García-Silva S. Extracellular vesicles and melanoma: New perspectives on tumor microenvironment and metastasis. Front Cell Dev Biol 2023; 10:1061982. [PMID: 36704194 PMCID: PMC9871288 DOI: 10.3389/fcell.2022.1061982] [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: 10/05/2022] [Accepted: 12/27/2022] [Indexed: 01/11/2023] Open
Abstract
Secreted extracellular vesicles (EVs) are lipid bilayer particles without functional nucleus naturally released from cells which constitute an intercellular communication system. There is a broad spectrum of vesicles shed by cells based on their physical properties such as size (small EVs and large EVs), biogenesis, cargo and functions, which provide an increasingly heterogenous landscape. In addition, they are involved in multiple physiological and pathological processes. In cancer, EV release is opted by tumor cells as a beneficial process for tumor progression. Cutaneous melanoma is a cancer that originates from the melanocyte lineage and shows a favorable prognosis at early stages. However, when melanoma cells acquire invasive capacity, it constitutes the most aggressive and deadly skin cancer. In this context, extracellular vesicles have been shown their relevance in facilitating melanoma progression through the modulation of the microenvironment and metastatic spreading. In agreement with the melanosome secretory capacity of melanocytes, melanoma cells display an enhanced EV shedding activity that has contributed to the utility of melanoma models for unravelling EV cargo and functions within a cancer scenario. In this review, we provide an in-depth overview of the characteristics of melanoma-derived EVs and their role in melanoma progression highlighting key advances and remaining open questions in the field.
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Affiliation(s)
- Alberto Benito-Martín
- Facultad de Medicina, Unidad de Investigación Biomédica, Universidad Alfonso X El Sabio (UAX), Villanueva de la Cañada, Spain,*Correspondence: Alberto Benito-Martín, ; Miriam Galvonas Jasiulionis, ; Susana García-Silva,
| | - Miriam Galvonas Jasiulionis
- Departamento de Farmacologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, São Paulo, Brazil,*Correspondence: Alberto Benito-Martín, ; Miriam Galvonas Jasiulionis, ; Susana García-Silva,
| | - Susana García-Silva
- Microenvironment and Metastasis Laboratory, Molecular Oncology Programme, Spanish National Cancer Research Center (CNIO), Madrid, Spain,*Correspondence: Alberto Benito-Martín, ; Miriam Galvonas Jasiulionis, ; Susana García-Silva,
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5
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Baess SC, Burkhart AK, Cappello S, Graband A, Seré K, Zenke M, Niemann C, Iden S. Lrig1- and Wnt-dependent niches dictate segregation of resident immune cells and melanocytes in murine tail epidermis. Development 2022; 149:275959. [PMID: 35815643 PMCID: PMC9382897 DOI: 10.1242/dev.200154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 06/13/2022] [Indexed: 11/20/2022]
Abstract
The barrier-forming, self-renewing mammalian epidermis comprises keratinocytes, pigment-producing melanocytes and resident immune cells as first-line host defense. In murine tail skin, interfollicular epidermis patterns into pigmented ‘scale’ and hypopigmented ‘interscale’ epidermis. Why and how mature melanocytes accumulate in scale epidermis is unresolved. Here, we delineate a cellular hierarchy among epidermal cell types that determines skin patterning. Already during postnatal development, melanocytes co-segregate with newly forming scale compartments. Intriguingly, this process coincides with partitioning of both Langerhans cells and dendritic epidermal T cells to interscale epidermis, suggesting functional segregation of pigmentation and immune surveillance. Analysis of non-pigmented mice and of mice lacking melanocytes or resident immune cells revealed that immunocyte patterning is melanocyte and melanin independent and, vice versa, immune cells do not control melanocyte localization. Instead, genetically enforced progressive scale fusion upon Lrig1 deletion showed that melanocytes and immune cells dynamically follow epithelial scale:interscale patterns. Importantly, disrupting Wnt-Lef1 function in keratinocytes caused melanocyte mislocalization to interscale epidermis, implicating canonical Wnt signaling in organizing the pigmentation pattern. Together, this work uncovers cellular and molecular principles underlying the compartmentalization of tissue functions in skin. Summary: Pigmentation and immune surveillance functions in murine tail skin are spatially segregated by Lrig1- and Wnt-Lef1-dependent keratinocyte lineages that control the partitioning of melanocytes and tissue-resident immune cells into distinct epidermal niches.
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Affiliation(s)
- Susanne C. Baess
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne 1 , 50931 Cologne , Germany
- Center for Molecular Medicine Cologne (CMMC), University of Cologne 2 , 50931 Cologne , Germany
- Cell and Developmental Biology, Center of Human and Molecular Biology (ZHMB), Saarland University 3 , Faculty of Medicine, 66421 Homburg/Saar , Germany
| | - Ann-Kathrin Burkhart
- Cell and Developmental Biology, Center of Human and Molecular Biology (ZHMB), Saarland University 3 , Faculty of Medicine, 66421 Homburg/Saar , Germany
| | - Sabrina Cappello
- Cell and Developmental Biology, Center of Human and Molecular Biology (ZHMB), Saarland University 3 , Faculty of Medicine, 66421 Homburg/Saar , Germany
| | - Annika Graband
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne 1 , 50931 Cologne , Germany
- Center for Molecular Medicine Cologne (CMMC), University of Cologne 2 , 50931 Cologne , Germany
- Cell and Developmental Biology, Center of Human and Molecular Biology (ZHMB), Saarland University 3 , Faculty of Medicine, 66421 Homburg/Saar , Germany
| | - Kristin Seré
- Institute for Biomedical Engineering 4 , Department of Cell Biology , , 52074 Aachen , Germany
- RWTH Aachen University Medical School 4 , Department of Cell Biology , , 52074 Aachen , Germany
- Helmholtz-Institute for Biomedical Engineering, RWTH Aachen University 5 , 52074 Aachen , Germany
| | - Martin Zenke
- Institute for Biomedical Engineering 4 , Department of Cell Biology , , 52074 Aachen , Germany
- RWTH Aachen University Medical School 4 , Department of Cell Biology , , 52074 Aachen , Germany
- Helmholtz-Institute for Biomedical Engineering, RWTH Aachen University 5 , 52074 Aachen , Germany
| | - Catherin Niemann
- Center for Molecular Medicine Cologne (CMMC), University of Cologne 2 , 50931 Cologne , Germany
- Center of Biochemistry 6 , Faculty of Medicine , , 50931 Cologne , Germany
- University Hospital Cologne 6 , Faculty of Medicine , , 50931 Cologne , Germany
| | - Sandra Iden
- Cologne Excellence Cluster on Cellular Stress Responses in Aging-Associated Diseases (CECAD), University of Cologne 1 , 50931 Cologne , Germany
- Center for Molecular Medicine Cologne (CMMC), University of Cologne 2 , 50931 Cologne , Germany
- Cell and Developmental Biology, Center of Human and Molecular Biology (ZHMB), Saarland University 3 , Faculty of Medicine, 66421 Homburg/Saar , Germany
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6
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Saida K, Chong PF, Yamaguchi A, Saito N, Ikehara H, Koshimizu E, Miyata R, Ishiko A, Nakamura K, Ohnishi H, Fujioka K, Sakakibara T, Asada H, Ogawa K, Kudo K, Ohashi E, Kawai M, Abe Y, Tsuchida N, Uchiyama Y, Hamanaka K, Fujita A, Mizuguchi T, Miyatake S, Miyake N, Kato M, Kira R, Matsumoto N. Monogenic causes of pigmentary mosaicism. Hum Genet 2022; 141:1771-1784. [PMID: 35503477 DOI: 10.1007/s00439-022-02437-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Accepted: 01/28/2022] [Indexed: 12/30/2022]
Abstract
Pigmentary mosaicism of the Ito type, also known as hypomelanosis of Ito, is a neurocutaneous syndrome considered to be predominantly caused by somatic chromosomal mosaicism. However, a few monogenic causes of pigmentary mosaicism have been recently reported. Eleven unrelated individuals with pigmentary mosaicism (mostly hypopigmented skin) were recruited for this study. Skin punch biopsies of the probands and trio-based blood samples (from probands and both biological parents) were collected, and genomic DNA was extracted and analyzed by exome sequencing. In all patients, plausible monogenic causes were detected with somatic and germline variants identified in five and six patients, respectively. Among the somatic variants, four patients had MTOR variant (36%) and another had an RHOA variant. De novo germline variants in USP9X, TFE3, and KCNQ5 were detected in two, one, and one patients, respectively. A maternally inherited PHF6 variant was detected in one patient with hyperpigmented skin. Compound heterozygous GTF3C5 variants were highlighted as strong candidates in the remaining patient. Exome sequencing, using patients' blood and skin samples is highly recommended as the first choice for detecting causative genetic variants of pigmentary mosaicism.
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Affiliation(s)
- Ken Saida
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan
| | - Pin Fee Chong
- Department of Pediatric Neurology, Fukuoka Children's Hospital, Fukuoka, Japan
| | - Asuka Yamaguchi
- Department of Pediatrics, Tokyo-Kita Medical Center, Tokyo, Japan
| | - Naka Saito
- Department of Pediatrics, Tsuruoka Municipal Shonai Hospital, Yamagata, Japan
| | - Hajime Ikehara
- Department of Pediatrics, Chiba University Graduate School of Medicine, Chiba, Japan
| | - Eriko Koshimizu
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan
| | - Rie Miyata
- Department of Pediatrics, Tokyo-Kita Medical Center, Tokyo, Japan
| | - Akira Ishiko
- Department of Dermatology, Toho University School of Medicine, Tokyo, Japan
| | - Kazuyuki Nakamura
- Department of Pediatrics, Faculty of Medicine, Yamagata University, Yamagata, Japan
| | - Hidenori Ohnishi
- Department of Pediatrics, Gifu University Graduate School of Medicine, Gifu, Japan
| | - Kei Fujioka
- Center of General Internal Medicine and Rheumatology, Gifu Municipal Hospital, Gifu, Japan
| | - Takafumi Sakakibara
- Department of Pediatrics, Nara Medical University School of Medicine, Nara, Japan
| | - Hideo Asada
- Department of Dermatology, Nara Medical University School of Medicine, Nara, Japan
| | - Kohei Ogawa
- Department of Dermatology, Nara Medical University School of Medicine, Nara, Japan
| | - Kyoko Kudo
- Department of Dermatology, Fukuoka Children's Hospital, Fukuoka, Japan
| | - Eri Ohashi
- Division of Neurology, National Center for Child Health and Development, Tokyo, Japan
| | - Michiko Kawai
- Division of Neurology, National Center for Child Health and Development, Tokyo, Japan
| | - Yuichi Abe
- Division of Neurology, National Center for Child Health and Development, Tokyo, Japan
| | - Naomi Tsuchida
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan.,Department of Rare Disease Genomics, Yokohama City University Hospital, Yokohama, Japan
| | - Yuri Uchiyama
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan.,Department of Rare Disease Genomics, Yokohama City University Hospital, Yokohama, Japan
| | - Kohei Hamanaka
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan
| | - Atsushi Fujita
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan
| | - Takeshi Mizuguchi
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan
| | - Satoko Miyatake
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan.,Clinical Genetics Department, Yokohama City University Hospital, Yokohama, Japan
| | - Noriko Miyake
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan.,Department of Human Genetics, Research Institute, National Center for Global Health and Medicine, Tokyo, Japan
| | - Mitsuhiro Kato
- Department of Pediatrics, Showa University School of Medicine, Shinagawa-ku, Tokyo, Japan
| | - Ryutaro Kira
- Department of Pediatric Neurology, Fukuoka Children's Hospital, Fukuoka, Japan
| | - Naomichi Matsumoto
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, 3-9 Fukuura, Kanazawa-ku, Yokohama, 236-0004, Japan.
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7
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Sevilla A, Chéret J, Slominski RM, Slominski AT, Paus R. Revisiting the role of melatonin in human melanocyte physiology: A skin context perspective. J Pineal Res 2022; 72:e12790. [PMID: 35133682 PMCID: PMC8930624 DOI: 10.1111/jpi.12790] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 01/24/2022] [Accepted: 02/02/2022] [Indexed: 11/30/2022]
Abstract
The evolutionarily ancient methoxyindoleamine, melatonin, has long perplexed investigators by its versatility of functions and mechanisms of action, which include the regulation of vertebrate pigmentation. Although first discovered through its potent skin-lightening effects in amphibians, melatonin's role in human skin and hair follicle pigmentation and its impact on melanocyte physiology remain unclear. Synthesizing our limited current understanding of this role, we specifically examine its impact on melanogenesis, oxidative biology, mitochondrial function, melanocyte senescence, and pigmentation-related clock gene activity, with emphasis on human skin, yet without ignoring instructive pointers from nonhuman species. Given the strict dependence of melanocyte functions on the epithelial microenvironment, we underscore that melanocyte responses to melatonin are best interrogated in a physiological tissue context. Current evidence suggests that melatonin and some of its metabolites inhibit both, melanogenesis (via reducing tyrosinase activity) and melanocyte proliferation by stimulating melatonin membrane receptors (MT1, MT2). We discuss whether putative melanogenesis-inhibitory effects of melatonin may occur via activation of Nrf2-mediated PI3K/AKT signaling, estrogen receptor-mediated and/or melanocortin-1 receptor- and cAMP-dependent signaling, and/or via melatonin-regulated changes in peripheral clock genes that regulate human melanogenesis, namely Bmal1 and Per1. Melatonin and its metabolites also accumulate in melanocytes where they exert net cyto- and senescence-protective as well as antioxidative effects by operating as free radical scavengers, stimulating the synthesis and activity of ROS scavenging enzymes and other antioxidants, promoting DNA repair, and enhancing mitochondrial function. We argue that it is clinically and biologically important to definitively clarify whether melanocyte cell culture-based observations translate into melatonin-induced pigmentary changes in a physiological tissue context, that is, in human epidermis and hair follicles ex vivo, and are confirmed by clinical trial results. After defining major open questions in this field, we close by suggesting how to begin answering them in clinically relevant, currently available preclinical in situ research models.
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Affiliation(s)
- Alec Sevilla
- Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Jérémy Chéret
- Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Radomir M. Slominski
- Graduate Biomedical Sciences Program, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Andrzej T. Slominski
- Department of Dermatology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Pathology Laboratory Service, Veteran Administration Medical Center at Birmingham, Birmingham, AL35294, USA
- Corresponding authors: Ralf Paus, MD, DSc: ; Andrzej T. Slominski, MD, PhD:
| | - Ralf Paus
- Dr. Phillip Frost Department of Dermatology and Cutaneous Surgery, University of Miami Miller School of Medicine, Miami, Florida, USA
- Monasterium Laboratory, Münster, Germany
- CUTANEON – Skin & Hair Innovations, Hamburg, Germany
- Corresponding authors: Ralf Paus, MD, DSc: ; Andrzej T. Slominski, MD, PhD:
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Deregulation of Trace Amine-Associated Receptors (TAAR) Expression and Signaling Mode in Melanoma. Biomolecules 2022; 12:biom12010114. [PMID: 35053262 PMCID: PMC8774021 DOI: 10.3390/biom12010114] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/05/2022] [Accepted: 01/09/2022] [Indexed: 12/10/2022] Open
Abstract
Trace amine-associated receptors (TAARs) interact with amine compounds called “trace amines” which are present in tissues at low concentrations. Recently, TAARs expression in neoplastic tumors was reported. In this study, TAARs expression was analyzed in public RNAseq datasets in nevi and melanoma samples and compared to the expression of dopamine receptors (DRDs) that are known to be involved in melanoma pathogenesis. It was found that all DRDs and TAARs are expressed in nevi at comparable levels. Differential expression analysis demonstrated the drastic decrease of TAAR1, TAAR2, TAAR5, TAAR6, and TAAR8 expression in melanomas compared to benign nevi with only TAAR6, TAAR8, and TAAR9 remaining detectable in malignant tumors. No association of TAARs expression levels and melanoma clinicopathological characteristics was observed. TAARs co-expressed genes in melanoma and nevi were selected by correlation values for comparative pathway enrichment analysis between malignant and benign neoplasia. It was found that coexpression of TAARs with genes inquired in neurotransmitter signaling is lost in melanoma, and tumor-specific association of TAAR6 expression with the mTOR pathway and inflammatory signaling is observed. It is not excluded that TAARs may have certain functions in melanoma pathogenesis, the significance of which to tumor progression is yet to be understood.
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9
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Enkhtaivan E, Lee CH. Role of Amine Neurotransmitters and Their Receptors in Skin Pigmentation: Therapeutic Implication. Int J Mol Sci 2021; 22:ijms22158071. [PMID: 34360837 PMCID: PMC8348573 DOI: 10.3390/ijms22158071] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 07/09/2021] [Accepted: 07/24/2021] [Indexed: 12/27/2022] Open
Abstract
Skin pigmentation can occur due to increased melanin, including melanocyte proliferation, melanin biosynthesis, or melanocyte migration. There are many factors that influence the melanin production process, but the role of neurotransmitters in this process is still unclear. We found that histamine and serotonin influence the different stages of melanogenesis and melanogenesis, which increase melanogenesis. Since then, several related papers have been published, and from these papers, it has been recognised that the role of neurotransmitters in skin-pigment-related diseases needs to be summarised. By introducing the role of neurotransmitters in the regulation of various pigment disorders, including vitiligo and melasma, through this review, many researchers can be expected to try to apply neurotransmitter-related agonists and antagonists as treatments for skin pigment disorders.
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Bilska B, Schedel F, Piotrowska A, Stefan J, Zmijewski M, Pyza E, Reiter RJ, Steinbrink K, Slominski AT, Tulic MK, Kleszczyński K. Mitochondrial function is controlled by melatonin and its metabolites in vitro in human melanoma cells. J Pineal Res 2021; 70:e12728. [PMID: 33650175 DOI: 10.1111/jpi.12728] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 02/19/2021] [Accepted: 02/23/2021] [Indexed: 12/16/2022]
Abstract
Melanoma is a leading cause of cancer deaths worldwide. Although immunotherapy has revolutionized the treatment for some patients, resistance towards therapy and unwanted side effects remain a problem for numerous individuals. Broad anti-cancer activities of melatonin are recognized; however, additional investigations still need to be elucidated. Herein, using various human melanoma cell models, we explore in vitro the new insights into the regulation of melanoma by melatonin and its metabolites which possess, on the other side, high safety profiles and biological meaningful. In this study, using melanotic (MNT-1) and amelanotic (A375, G361, Sk-Mel-28) melanoma cell lines, the comparative oncostatic responses, the impact on melanin content (for melanotic MNT-1 melanoma cells) as well as the mitochondrial function controlled by melatonin, its precursor (serotonin), a kynuric (N1 -acetyl-N2 -formyl-5-methoxykynuramine, AFMK) and indolic pathway (6-hydroxymelatonin, 6(OH)MEL and 5-methoxytryptamine, 5-MT) metabolites were assessed. Namely, significant disturbances were observed in bioenergetics as follows: (i) uncoupling of oxidative phosphorylation (OXPHOS), (ii) attenuation of glycolysis, (iii) dissipation of mitochondrial transmembrane potential (mtΔΨ) accompanied by (iv) massive generation of reactive oxygen species (ROS), and (v) decrease of glucose uptake. Collectively, these results together with previously published reports provide a new biological potential and make an imperative to consider using melatonin or its metabolites for complementary future treatments of melanoma-affected patients; however, these associations should be additionally investigated in clinical setting.
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Affiliation(s)
- Bernadetta Bilska
- Department of Cell Biology and Imaging, Institute of Zoology and Biomedical Research, Jagiellonian University, Kraków, Poland
| | - Fiona Schedel
- Department of Dermatology, University of Münster, Münster, Germany
| | - Anna Piotrowska
- Department of Histology, Medical University of Gdańsk, Gdańsk, Poland
| | - Joanna Stefan
- Department of Oncology, Nicolaus Copernicus University Medical College, Bydgoszcz, Poland
- Department of Dermatology, Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Michal Zmijewski
- Department of Histology, Medical University of Gdańsk, Gdańsk, Poland
| | - Elżbieta Pyza
- Department of Cell Biology and Imaging, Institute of Zoology and Biomedical Research, Jagiellonian University, Kraków, Poland
| | - Russel J Reiter
- Department of Cellular and Structural Biology, UT Health, San Antonio, TX, USA
| | | | - Andrzej T Slominski
- Department of Dermatology, Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, USA
- Pathology and Laboratory Medicine Service, VA Medical Center, Birmingham, AL, USA
| | - Meri K Tulic
- Université Côte d'Azur, INSERM U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Nice, France
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