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Sakatoku A, Suzuki T, Hatano K, Seki M, Tanaka D, Nakamura S, Suzuki N, Isshiki T. Inhibitors of LAMP used to detect Tenacibaculum sp. strain Pbs-1 associated with black-spot shell disease in Akoya pearl oysters, and additives to reduce the effect of the inhibitors. J Microbiol Methods 2024; 223:106986. [PMID: 38969181 DOI: 10.1016/j.mimet.2024.106986] [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: 03/10/2024] [Revised: 06/30/2024] [Accepted: 06/30/2024] [Indexed: 07/07/2024]
Abstract
Black-spot shell disease is an unresolved disease that decreases pearl quality and threatens pearl oyster survival. In previous studies, the bacterium Tenacibaculum sp. strain Pbs-1 was isolated from diseased Akoya pearl oysters Pinctada fucata, and a rapid, specific, and sensitive loop-mediated isothermal amplification (LAMP) assay for detecting this pathogen was established. This technology has considerable potential for routine diagnosis of strain Pbs-1 in oyster hatcheries and/or pearl farms; therefore, it is vital to identify substances in environmental samples that might inhibit LAMP and to find additives that can reduce the inhibition. In this study, we investigated the effects of six chemicals or proteins, otherwise known as conventional PCR inhibitors, on LAMP, using the DNA of strain Pbs-1 as template: humic acid, urea, iron (III) chloride hexahydrate, melanin, myoglobin, and Ethylenediamine-N,N,N',N'-tetraacetic acid, disodium salt, dihydrate (EDTA; pH 6.5). Next, to reduce the effects of identified inhibitors, we tested the addition of bovine serum albumin (BSA) or T4 gene 32 protein (gp32) to the LAMP assay. When 50 ng of DNA template was used, 4 ng/μL of humic acid, 0.05% melanin, and 10 mM of EDTA (pH 6.5) inhibited the LAMP reaction, whereas myoglobin, urea, and FeCl3 had no effect. When 50 pg of DNA template was used, 4 ng/μL of humic acid, 0.05% melanin, 4 μg/μL of myoglobin, 10 μg/μL of urea, and 10 mM of EDTA inhibited the LAMP reaction. Thus, it was shown that the gene-amplification inhibitory effect of melanin, humic acid, and urea could be reduced by adding BSA or gp32 to the LAMP reaction mixture. This technique could be applied as part of a protocol to prevent mass mortalities of pearl oysters; moreover, the results enhance our knowledge about substances that inhibit LAMP and methods to reduce the inhibition, which have rarely been reported.
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Affiliation(s)
- Akihiro Sakatoku
- School of Science, Academic Assembly, University of Toyama, Toyama 930-8555, Japan.
| | - Takaya Suzuki
- School of Science, Academic Assembly, University of Toyama, Toyama 930-8555, Japan
| | - Kaito Hatano
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-cho, Ishikawa 927-0553, Japan
| | - Makoto Seki
- School of Science, Academic Assembly, University of Toyama, Toyama 930-8555, Japan
| | - Daisuke Tanaka
- School of Science, Academic Assembly, University of Toyama, Toyama 930-8555, Japan
| | - Shogo Nakamura
- School of Science, Academic Assembly, University of Toyama, Toyama 930-8555, Japan
| | - Nobuo Suzuki
- Noto Marine Laboratory, Institute of Nature and Environmental Technology, Kanazawa University, Ogi, Noto-cho, Ishikawa 927-0553, Japan
| | - Tadashi Isshiki
- Graduate School of Bioresources, Mie University, 1577 Kurimamachiya, Tsu, Mie 514-8507, Japan
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He W, Lin J, Yu F, Leng Y, Pan Z, Liang Q, Liu S, Huang X. Identification and function analysis of BCL2 in immune response of Pteria penguin. FISH & SHELLFISH IMMUNOLOGY 2024; 149:109574. [PMID: 38692379 DOI: 10.1016/j.fsi.2024.109574] [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: 01/21/2024] [Revised: 03/28/2024] [Accepted: 04/17/2024] [Indexed: 05/03/2024]
Abstract
B-cell lymphoma/leukemia-2 (BCL2), an anti-apoptotic factor in the mitochondrial regulatory pathway of apoptosis, is critically important in immune defenses. In this study, a novel BCL2 gene was characterized from Pteria penguin (P. penguin). The PpBCL2 was 1482 bp long, containing an open reading frame (ORF) of 588 bp encoding 195 amino acids. Four highly conserved BCL-2 homology (BH) domains were found in PpBCL2. Amino acid alignment and phylogenetic tree showed that PpBCL2 had the highest similarity with BCL2 of Crassostrea gigas at 65.24 %. Tissue expression analysis showed that PpBCL2 had high constitutive expression in gill, digestive diverticulum and mantle, and was significantly increased 72 h of Vibrio parahaemolyticus (V. parahaemolyticus) challenge in these immune tissues. Furthermore, PpBCL2 silencing significantly inhibited antimicrobial activity of hemolymph supernatant by 1.4-fold, and significantly reduced the survival rate by 51.7 % at 72 h post infection in P. penguin. These data indicated that PpBCL2 played an important role in immune response of P. penguin against V. parahaemolyticus infection.
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Affiliation(s)
- Wenhao He
- College of Fisheries, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China; Academician Joint Laboratory of Germplasm Resource Exploitation, Utilization and Health Assessment for Aquatic Animal, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China
| | - Jinji Lin
- College of Fisheries, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China; Academician Joint Laboratory of Germplasm Resource Exploitation, Utilization and Health Assessment for Aquatic Animal, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China
| | - Feifei Yu
- College of Fisheries, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China; Academician Joint Laboratory of Germplasm Resource Exploitation, Utilization and Health Assessment for Aquatic Animal, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China; Guangdong Provincial Key Laboratory of Aquatic Animal Disease Control and Healthy Culture & Key Laboratory of Control for Diseases of Aquatic Economic Animals of Guangdong Higher Education Institutes, College of Fisheries, Guangdong Ocean University, Zhanjiang City, 524088, Guangdong, China.
| | - Yang Leng
- Experiment Animal Center, Guangdong Medical University, Zhanjiang, Guangdong, 524023, China.
| | - Zhenni Pan
- Fangchenggang Marine Environmental Monitoring and Forecasting Center, Fangchenggang, Guangxi, 538000, China
| | - Qiwen Liang
- College of Fisheries, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China; Academician Joint Laboratory of Germplasm Resource Exploitation, Utilization and Health Assessment for Aquatic Animal, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China
| | - Siying Liu
- College of Fisheries, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China; Academician Joint Laboratory of Germplasm Resource Exploitation, Utilization and Health Assessment for Aquatic Animal, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China
| | - Xinyue Huang
- College of Fisheries, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China
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Xu Q, Nie H, Ma Q, Wang J, Huo Z, Yan X. The lgi-miR-2d is Potentially Involved in Shell Melanin Synthesis by Targeting mitf in Manila Clam Ruditapes philippinarum. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2024; 26:432-446. [PMID: 38607523 DOI: 10.1007/s10126-024-10307-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Accepted: 03/21/2024] [Indexed: 04/13/2024]
Abstract
Shell color as an important economic trait is also the crucial target trait for breeding and production. MicroRNA (miRNA) is an endogenous small non-coding RNA that can post-transcriptionally regulate the expression of target genes, it plays important roles in many life activities and physiological processes, such as shell color, stress response, and disease traits. In this study, we investigated the function of lgi-miR-2d in shell melanin formation and the expression patterns of lgi-miR-2d and target gene Rpmitf in Manila clam Ruditapes philippinarum. We further explored and verified the relationship between Rpmitf and lgi-miR-2d and identified the expression level of shell color-related gene changes by RNAi and injecting the antagomir of lgi-miR-2d, respectively. Our results indicated that lgi-miR-2d antagomir affected the expression of its target gene Rpmitf. In addition, the dual-luciferase reporter assay was conducted to confirm the direct interaction between lgi-miR-2d and Rpmitf. The results showed that the expression levels of melanin-related genes such as Rpmitf and tyr were significantly decreased in the positive treatment group compared with the blank control group after the Rpmitf dsRNA injection, indicating Rpmitf plays a crucial role in the melanin synthesis pathway. Taken together, we speculated that lgi-miR-2d might be negatively modulating Rpmitf, which might regulate other shell color-related genes, thereby affecting melanin synthesis in R. philippinarum.
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Affiliation(s)
- Qiaoyue Xu
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, 116023, China
- Engineering and Technology Research Center of Shellfish Breeding in Liaoning Province, Dalian Ocean University, Dalian, 116023, China
| | - Hongtao Nie
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, 116023, China.
- Engineering and Technology Research Center of Shellfish Breeding in Liaoning Province, Dalian Ocean University, Dalian, 116023, China.
| | - Qianying Ma
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, 116023, China
- Engineering and Technology Research Center of Shellfish Breeding in Liaoning Province, Dalian Ocean University, Dalian, 116023, China
| | - Jiadi Wang
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, 116023, China
- Engineering and Technology Research Center of Shellfish Breeding in Liaoning Province, Dalian Ocean University, Dalian, 116023, China
| | - Zhongming Huo
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, 116023, China
- Engineering and Technology Research Center of Shellfish Breeding in Liaoning Province, Dalian Ocean University, Dalian, 116023, China
| | - Xiwu Yan
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, 116023, China
- Engineering and Technology Research Center of Shellfish Breeding in Liaoning Province, Dalian Ocean University, Dalian, 116023, China
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Jiang K, Yu H, Kong L, Liu S, Li Q. cAMP-Mediated CREM-MITF-TYR Axis Regulates Melanin Synthesis in Pacific Oysters. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2024; 26:460-474. [PMID: 38613620 DOI: 10.1007/s10126-024-10309-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Accepted: 04/03/2024] [Indexed: 04/15/2024]
Abstract
Colorful shells in bivalves are mostly caused by the presence of biological pigments, among which melanin is a key component in the formation of shell colours. Cyclic adenosine monophosphate (cAMP) is an important messenger in the regulation of pigmentation in some species. However, the role of cAMP in bivalve melanogenesis has not yet been reported. In this study, we performed in vitro and in vivo experiments to determine the role of cAMP in regulating melanogenesis in Pacific oysters. Besides, the function of cAMP-responsive element modulator (CREM) and the interactions between CREM and melanogenic genes were investigated. Our results showed that a high level of cAMP promotes the expression of melanogenic genes in Pacific oysters. CREM controls the expression of the MITF gene under cAMP regulation. In addition, CREM can regulate melanogenic gene expression, tyrosine metabolism, and melanin synthesis. These results indicate that cAMP plays an important role in the regulation of melanogenesis in Pacific oysters. CREM is a key transcription factor in the oyster melanin synthesis pathway, which plays a crucial role in oyster melanin synthesis through a cAMP-mediated CREM-MITF-TYR axis.
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Affiliation(s)
- Kunyin Jiang
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, 266003, China
| | - Hong Yu
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, 266003, China
| | - Lingfeng Kong
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, 266003, China
| | - Shikai Liu
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, 266003, China
| | - Qi Li
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao, 266003, China.
- Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266237, China.
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Monmai C, Kim JS, Baek SH. Resveratrol-Enriched Rice Callus Extract Inhibits Oxidative and Cellular Melanogenic Activities in Melan-A Cells. Antioxidants (Basel) 2024; 13:625. [PMID: 38929064 PMCID: PMC11201182 DOI: 10.3390/antiox13060625] [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: 05/09/2024] [Revised: 05/16/2024] [Accepted: 05/20/2024] [Indexed: 06/28/2024] Open
Abstract
The excessive production of melanin can cause skin diseases and hyperpigmentation. In this study, resveratrol contained in Dongjin rice seed (DJ526) was increased through callus induction. The antioxidant capacity of resveratrol-enriched rice callus was evaluated using the ABTS radical scavenging method and was equivalent to that of vitamin C. DJ526 rice callus extract significantly increased antioxidant activities in a concentration-dependent manner. The anti-melanogenesis effects of DJ526 rice callus extract were also evaluated in melan-a cells. Resveratrol-enriched rice callus extract significantly (i) decreased the size and number of melanin-containing cells, (ii) suppressed the activity of cellular tyrosinase and melanin content, (iii) downregulated the expression of microphthalmia-associated transcription factor, tyrosinase, tyrosinase-related protein-1, and tyrosinase-related protein-2, (iv) increased the expression of phosphorylated extracellular signal-regulated kinase 1/2 and protein kinase B, and (v) inhibited the activation of phosphorylated p38 in melan-a cells. From the above observations, DJ526 rice callus extract showed strong antioxidant and anti-melanogenesis activity at the concentration test. These findings indicate the potential of resveratrol-enriched rice callus as a novel agent for controlling hyperpigmentation.
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Affiliation(s)
| | | | - So-Hyeon Baek
- Department of Agriculture Life Science, Sunchon National University, Suncheon 59722, Republic of Korea; (C.M.); (J.-S.K.)
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Jeon G, Hwang AR, Park DY, Kim JH, Kim YH, Cho BK, Min J. miRNA profiling of B16F10 melanoma cell exosomes reveals melanin synthesis-related genes. Heliyon 2024; 10:e30474. [PMID: 38711645 PMCID: PMC11070906 DOI: 10.1016/j.heliyon.2024.e30474] [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: 10/02/2023] [Revised: 04/26/2024] [Accepted: 04/27/2024] [Indexed: 05/08/2024] Open
Abstract
This study investigates the communication between skin cells, specifically melanocytes, keratinocytes, and fibroblasts, which is crucial for the process of melanin production known as melanogenesis. We aimed to understand the role of melanocyte exosomes in regulating melanogenesis and to uncover the microRNAs influencing this process. We isolated exosomes and characterized them using advanced microscopy and protein analysis to achieve this. We conducted experiments on melanoma cells to study melanin production regulation and examined how exosomes influenced gene expression related to melanogenesis. The results revealed that melanocyte exosomes increased certain types of tyrosinases, thereby enhancing melanin production. Furthermore, we acquired the miRNA profile of exosomes and hypothesized that specific siRNAs, such as miR-21a-5p, could potentially facilitate melanin synthesis. Our findings shed light on the importance of exosomes in skin health and provide valuable insights into intercellular communication mechanisms. Understanding these processes can pave the way for innovative therapies to treat melanin-related disorders and maintain healthy skin.
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Affiliation(s)
- Gyeongchan Jeon
- Graduate School of Semiconductor and Chemical Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea
| | - Ae Rim Hwang
- Graduate School of Semiconductor and Chemical Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea
| | - Dae-Young Park
- Department of Microbiology, Chungbuk National University, Chungdae-Ro, Seowon-Gu, Cheongju, 28644, Republic of Korea
| | - Ji-Hun Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-Gu, Daejeon, 34141, Republic of Korea
| | - Yang-Hoon Kim
- Department of Microbiology, Chungbuk National University, Chungdae-Ro, Seowon-Gu, Cheongju, 28644, Republic of Korea
| | - Byung-Kwan Cho
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Yuseong-Gu, Daejeon, 34141, Republic of Korea
| | - Jiho Min
- Graduate School of Semiconductor and Chemical Engineering, Jeonbuk National University, 567 Baekje-daero, Deokjin-gu, Jeonju-si, Jeollabuk-do, 54896, Republic of Korea
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Bjørgen H, Koppang EO. The melano-macrophage: The black leukocyte of fish immunity. FISH & SHELLFISH IMMUNOLOGY 2024; 148:109523. [PMID: 38522495 DOI: 10.1016/j.fsi.2024.109523] [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: 01/04/2024] [Revised: 03/20/2024] [Accepted: 03/21/2024] [Indexed: 03/26/2024]
Abstract
Melanin and the process of melanin synthesis or melanogenesis have central roles in the immune system of insects, and production of melanin-synthesizing enzymes from their haemocytes may be induced following activation through danger signals. Melanin-containing macrophage-like cells have been extensively studied in amphibians and they are also present in reptiles. In fish, melano-macrophages are especially recognized with respect to melano-macrophage centres (MMCs), hypothesized to be analogues of germinal centres in secondary lymphoid organs of mammals and some birds. Melano-macrophages are in addition present in several inflammatory conditions, in particular melanised focal changes, or black spots, in the musculature of farmed Atlantic salmon, Salmo salar. Melanins are complex compounds that may be divided into different forms which all have the ability to absorb and scatter light. Other functions include the quenching of free radicals and a direct effect on the immune system. According to the common view held in the pigment cell community, vertebrate melanin synthesis with melanosome formation may only occur in cells of ectodermal origin. However, abundant information suggests that also myeloid cells of ectothermic vertebrates may be classified as melanocytes. Here, we discuss these opposing views and review relevant literature. Finally, we review the current status on the research concerning melanised focal muscle changes that represent the most severe quality problem in Norwegian salmon production, but also other diseases where melano-macrophages play important roles.
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Affiliation(s)
- Håvard Bjørgen
- Unit of Anatomy, Veterinary Faculty, Norwegian University of Life Sciences (NMBU), Ås, Norway
| | - Erling Olaf Koppang
- Unit of Anatomy, Veterinary Faculty, Norwegian University of Life Sciences (NMBU), Ås, Norway.
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Sanjaya SS, Park MH, Karunarathne WAHM, Lee KT, Choi YH, Kang CH, Lee MH, Jung MJ, Ryu HW, Kim GY. Inhibition of α-melanocyte-stimulating hormone-induced melanogenesis and molecular mechanisms by polyphenol-enriched fraction of Tagetes erecta L. flower. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2024; 126:155442. [PMID: 38394730 DOI: 10.1016/j.phymed.2024.155442] [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: 09/20/2023] [Revised: 01/30/2024] [Accepted: 02/08/2024] [Indexed: 02/25/2024]
Abstract
BACKGROUND The pursuit for safe and efficacious skin-whitening agents has prompted a dedicated exploration of plant-derived compounds. Notably, Tagetes erecta L. flowers have been used as a medicinal extract and possessed in vitro mushroom tyrosinase activity. However, whether polyphenol-enriched fraction extracted from T. erecta L. flowers (TE) regulates melanogenesis within cellular and animal models has not yet been investigated. PURPOSE This study aimed to investigate the effect of TE as a prospective inhibitor of melanogenesis. METHODS Through advanced UPLC-QTof/MS analysis, the components of TE were analyzed. Anti-melanogenic effects of TE were evaluated in α-melanocyte-stimulating hormone (α-MSH)-stimulated B16F10 melanoma cells by measuring cell viability assay, extracellular and intracellular melanin biosynthesis, cyclic adenosine monophosphate (cAMP) production, and melanogenesis-related gene and protein expression. Zebrafish larvae were employed for in vivo studies, assessing both heart rate and melanogenesis. Furthermore, molecular docking analyses were employed to predict the interaction between TE components and the melanocortin 1 receptor (MC1R). Direct binding activity of TE components to MC1R was compared with [Nle4, d-Phe7]-MSH (NDP-MSH). RESULTS TE was found to contain significant phenolic compounds such as patulitrin, quercetagetin, kaempferol, patuletin, and isorhamnetin. This study revealed that TE effectively inhibits melanin biosynthesis in both in vitro and in vivo models. This inhibition was attributed to interference of TE with the cAMP-cAMP response element-binding protein (CREB)-microphthalmia-associated transcription factor (MITF)-tyrosinase pathway, which plays a pivotal role in regulating melanogenesis. Importantly, TE exhibited the remarkable ability to curtail α-MSH-induced melanogenesis in zebrafish larvae without impacting heart rates. Molecular docking analyses predicted that the components of TE possibly interact with the melanocortin 1 receptor, suggesting their role as potential inhibitors of melanin biosynthesis. However, through the direct binding activity compared with NDP-MSH, any TE components did not directly bind to MC1R, suggesting that TE inhibits α-MSH-induced melanogenesis by inhibiting the cAMP-mediated intracellular signaling pathway. The assessment of anti-melanogenic activity, conducted both in vitro and in vivo, revealed that patulitrin and patuletin exhibited significant inhibitory effects on melanin formation, highlighting their potency as major contributors. DISCUSSION This investigation demonstrated the considerable potential of TE as a natural remedy endowed with remarkable anti-melanogenic properties. The demonstrated capacity of TE to attenuate melanin production by modulating the cAMP-CREB-MITF-tyrosinase pathway underscores its central role in management of disorders associated with excessive pigmentation. Importantly, the implications of these findings extend to the cosmetics industry, where TE emerges as a prospective and valuable ingredient for the formulation of skin-whitening products. The elucidated interactions between TE components and MC1R not only provide insight into a potential mechanism of action but also elevate the significance of this study. In summary, this study not only contributes to our comprehension of pigmentation-related conditions but also firmly establishes TE as a secure and natural strategy for the regulation of melanin production. The innovative aspects of TE propel it into the forefront of potential interventions, marking a noteworthy advancement in the pursuit of effective and safe solutions for pigmentation disorders.
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Affiliation(s)
| | - Mi Hyeon Park
- Natural Product Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, Republic of Korea
| | | | - Kyoung Tae Lee
- Forest Bioresources Department, Forest Microbiology Division, National Institute of Forest Science, Suwon 16631, Republic of Korea
| | - Yung Hyun Choi
- Department of Biochemistry, College of Korean Medicine, Dong-Eui University, Busan 47227, Republic of Korea
| | - Chang-Hee Kang
- Nakdonggang National Institute of Biological Resources, Sangju 37242, Republic of Korea
| | - Mi-Haw Lee
- Nakdonggang National Institute of Biological Resources, Sangju 37242, Republic of Korea
| | - Min-Jeong Jung
- GENE & BIO, 145 Sindae-ro, Jeju 63134, Republic of Korea
| | - Hyung Won Ryu
- Natural Product Research Center, Korea Research Institute of Bioscience and Biotechnology, Cheongju 28116, Republic of Korea.
| | - Gi-Young Kim
- Department of Marine Life Science, Jeju National University, Jeju 63243, Republic of Korea.
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Li R, Li D, Xu S, Zhang P, Zhang Z, He F, Li W, Sun G, Jiang R, Li Z, Tian Y, Liu X, Kang X. Whole-transcriptome sequencing reveals a melanin-related ceRNA regulatory network in the breast muscle of Xichuan black-bone chicken. Poult Sci 2024; 103:103539. [PMID: 38382189 PMCID: PMC10900940 DOI: 10.1016/j.psj.2024.103539] [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: 11/28/2023] [Revised: 01/31/2024] [Accepted: 02/05/2024] [Indexed: 02/23/2024] Open
Abstract
The economic losses incurred due to reduced muscle pigmentation highlight the crucial role of melanin-based coloration in the meat of black-bone chickens. Melanogenesis in the breast muscle of black-bone chickens is currently poorly understood in terms of molecular mechanisms. This study employed whole-transcriptome sequencing to analyze black and white breast muscle samples from black-bone chickens, leading to the identification of 367 differentially expressed (DE) mRNAs, 48 DElncRNAs, 104 DEcircRNAs, and 112 DEmiRNAs involved in melanin deposition. Based on these findings, a competitive endogenous RNA (ceRNA) network was developed to better understand the complex mechanisms of melanin deposition. Furthermore, our analysis revealed key DEmRNAs (TYR, DCT, EDNRB, MLPH and OCA2) regulated by DEmiRNAs (gga-miR-140-5p, gga-miR-1682, gga-miR-3529, gga-miR-499-3p, novel-m0012-3p, gga-miR-200b-5p, gga-miR-203a, gga-miR-6651-5p, gga-miR-7455-3p, gga-miR-31-5p, miR-140-x, miR-455-x, novel-m0065-3p, gga-miR-29b-1-5p, miR-455-y, novel-m0085-3p, and gga-miR-196-1-3p). These DEmiRNAs competitively interacted with DElncRNAs including MSTRG.2609.2, MSTRG.4185.1, LOC112530666, LOC112533366, LOC771030, LOC107054724, LOC121107411, LOC100859072, LOC101750037, LOC121108550, LOC121109224, LOC121110876, and LOC101749016, as well as DEcircRNAs, such as novel_circ_000158, novel_circ_000623, novel_001518, and novel_circ_003596. The findings from this study provide insight into the mechanisms that regulate lncRNA, circRNA, miRNA, and mRNA expression in chicken melanin deposition.
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Affiliation(s)
- Ruiting Li
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China; Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou, 450046, China
| | - DongHua Li
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China; Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou, 450046, China.
| | - Shuohui Xu
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China; Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou, 450046, China
| | - Pengwei Zhang
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China; Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou, 450046, China
| | - Zhiyuan Zhang
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China; Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou, 450046, China
| | - Fumin He
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China; Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou, 450046, China
| | - Wenting Li
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China; Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou, 450046, China; The Shennong Laboratory, Zhengzhou, 450046, China
| | - Guirong Sun
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China; Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou, 450046, China; The Shennong Laboratory, Zhengzhou, 450046, China
| | - Ruirui Jiang
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China; Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou, 450046, China
| | - Zhuanjian Li
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China; Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou, 450046, China
| | - Yadong Tian
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China; Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou, 450046, China
| | - Xiaojun Liu
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China; Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou, 450046, China
| | - Xiangtao Kang
- College of Animal Science and Technology, Henan Agricultural University, Zhengzhou, 450046, China; Henan Key Laboratory for Innovation and Utilization of Chicken Germplasm Resources, Zhengzhou, 450046, China; The Shennong Laboratory, Zhengzhou, 450046, China
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10
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Zhu Y, Li Q. Mitf involved in shell pigmentation by activating tyrosinase-mediated melanin synthesis in Pacific oyster (Crassostrea gigas). Gene 2024; 897:148086. [PMID: 38104952 DOI: 10.1016/j.gene.2023.148086] [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: 09/29/2023] [Revised: 12/05/2023] [Accepted: 12/13/2023] [Indexed: 12/19/2023]
Abstract
Pigmentation is frequently observed in the molluscan shells, whereas the molecular regulation about these shell pigments formation is not clear. The microphthalmia-associated transcription factor (Mitf) is an important transactivator in melanin synthesis in vertebrates. Here, the Mitf containing a highly conserved basic helix-loop-helixleucine zipper (bHLH-LZ) domain was identified in an economically important marine bivalve Pacific oyster Crassostrea gigas. The Mitf was found to widespread tissue distribution and the expression was higher in the marginal mantle than in the central mantle. Particularly, the expression level of Mitf was high in black shell color oysters compared with white shell oysters. After injecting siRNA, the expression of Mitf decreased significantly, and the efficiency of RNA interference reached 53%. Besides, knockdown Mitf obviously decreased expression of tyrosinase family genes and tyrosinase activity of mantles, indicating a potential regulatory relationship between Mitf and Tyr or Typs. Simultaneously, there was a sharply reduce in the number of the melanosomes in the outer fold of mantle by silencing of Mitf. Luciferase assays in cell culture further verified that Mitf was involved in transcriptional regulation of Typ-2 and Typ-3 genes through binding to their specific promoter regions. These data argue that Mitf is involved in shell pigmentation through activating tyrosinase-mediated melanin synthesis in C. gigas.
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Affiliation(s)
- Yijing Zhu
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China; Marine Science Research Institute of Shandong Province (National Oceanographic Center, Qingdao), Qingdao 266104, China
| | - Qi Li
- Key Laboratory of Mariculture, Ministry of Education, Ocean University of China, Qingdao 266003, China; Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China.
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11
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Wu S, Huang J, Li Y, Zhao L. Involvement of miR-495 in the skin pigmentation of rainbow trout (Oncorhynchus mykiss) through the regulation of mc1r. Int J Biol Macromol 2024; 254:127638. [PMID: 37879576 DOI: 10.1016/j.ijbiomac.2023.127638] [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: 05/09/2023] [Revised: 09/04/2023] [Accepted: 10/21/2023] [Indexed: 10/27/2023]
Abstract
MicroRNAs (miRNAs) play crucial roles in skin pigmentation in animals. Rainbow trout (Oncorhynchus mykiss) is a key economic fish species worldwide, and skin color directly affects its economic value. However, the functions of miRNAs in rainbow trout skin pigmentation remain largely unknown. Herein, we overexpressed and silenced miR-495 in vitro and in vivo to investigate its functions. The analysis of spatial and temporal expression patterns suggested that miR-495 is a potential regulator during the process of skin pigmentation. In vitro, mc1r was validated as a direct target for miR-495 by dual-luciferase reporter assay, and overexpression of miR-495 significantly inhibited mc1r expression; in contrast, mc1r and its downstream gene mitf levels were markedly upregulated by decreased miR-495. In vivo, overexpressed miR-495 by injecting agomiR-495 led to a substantial decrease in the expression of mc1r and mitf in dorsal skin and liver, while the opposite results were obtained after miR-495 silencing by antagomiR-495. These findings suggested that miR-495 can target mc1r to regulate rainbow trout skin pigmentation, which provide a potential basis for using miRNAs as target drugs to treat pigmentation disorders and melanoma.
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Affiliation(s)
- Shenji Wu
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
| | - Jinqiang Huang
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China.
| | - Yongjuan Li
- College of Science, Gansu Agricultural University, Lanzhou 730070, China
| | - Lu Zhao
- College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
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12
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Liu J, Nie H, Huo Z, Yan X. Genome-Wide Identification and Characterization of MITF Genes in Ruditapes philippinarum and Their Involvement in the Immune Response to Vibrio anguillarum Infection. Biochem Genet 2023; 61:2514-2530. [PMID: 37119506 DOI: 10.1007/s10528-023-10365-1] [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: 08/01/2022] [Accepted: 03/09/2023] [Indexed: 05/01/2023]
Abstract
Studies have shown that the shellfish have innate immune system, which is a very important immune form of shellfish, and they rely on the innate immune system to resist diseases. As a transcription factor, Microphthalmia-associated transcription factor (MITF) plays a regulatory role in immune response and the shell color is also an important index for the breeding of excellent varieties of R. philippinarum. The research on immune response mechanism of RPMITFs can provide important reference data for the breeding of excellent clam varieties. In the genome of R. philippinarum, the RPMITF genes family of shell color-related gene family was selected as the target gene of this experiment. There are 12 RpMITF genes named RpMITF1, RpMITF2, RpMITF3, RpMITF4, RpMITF5, RpMITF6, RpMITF7, RpMITF8, RpMITF9, RpMITF10, RpMITF11, and RpMITF12. The open reading frame length is 639, 1233, 996, 1239, 675, 624, 816, 1365, 612, 1614, 1122, and 486 bp, encoding 212, 410, 331, 412, 224, 207, 271, 454, 203, 537, 373, and 161 aa, respectively. The predicted molecular weight range of amino acids is 18.85-62.61 kda, and the isoelectric point range is 5.26-9.44. Real-time quantitative PCR was used to detect the gene expression of RpMITF gene family in hepatopancreas tissues of two populations of Manila clam at 6 time points (0, 3, 6, 12, 24, and 48 h) after Vibrio anguillarum stress. The results show that RpMITF gene family was significantly expressed in hepatopancreas of two clam populations after V. anguillarum stress (P < 0.05).
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Affiliation(s)
- Jie Liu
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, 116023, China
- Engineering Research Center of Shellfish Culture and Breeding in Liaoning Province, Dalian Ocean University, Dalian, 116023, China
| | - Hongtao Nie
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, 116023, China.
- Engineering Research Center of Shellfish Culture and Breeding in Liaoning Province, Dalian Ocean University, Dalian, 116023, China.
| | - Zhongming Huo
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, 116023, China.
- Engineering Research Center of Shellfish Culture and Breeding in Liaoning Province, Dalian Ocean University, Dalian, 116023, China.
| | - Xiwu Yan
- College of Fisheries and Life Science, Dalian Ocean University, Dalian, 116023, China
- Engineering Research Center of Shellfish Culture and Breeding in Liaoning Province, Dalian Ocean University, Dalian, 116023, China
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13
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Neo JRE, Teo CWL, Ung YW, Yap WN. Tocotrienol-Rich Fraction Attenuates Blue Light-Induced Oxidative Stress and Melanogenesis in B16-F1 Melanocytes via Anti-Oxidative and Anti-Tyrosinase Properties. Int J Mol Sci 2023; 24:15373. [PMID: 37895053 PMCID: PMC10607579 DOI: 10.3390/ijms242015373] [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: 09/22/2023] [Revised: 10/14/2023] [Accepted: 10/18/2023] [Indexed: 10/29/2023] Open
Abstract
Our skin is constantly exposed to blue light (BL), which is abundant in sunlight and emitted by digital devices. Prolonged exposure to BL can lead to oxidative stress-induced damages and skin hyperpigmentation. For this study, we used a cell line-based model to examine the protective effects of tocotrienol-rich fraction (TRF) on BL-induced oxidative stress and hyperpigmentation in B16-F1 melanocytes. Alpha-tocopherol (αTP) was used as a comparator. Molecular assays such as cell viability assay, flow cytometry, western blotting, fluorescence imaging, melanin and tyrosinase analysis were performed. Our results showed that TRF effectively suppressed the formation of reactive oxygen species and preserved the mitochondrial membrane potential. Additionally, TRF exhibited anti-apoptotic properties by reducing the activation of the p38 mitogen-activated protein kinase molecule and downregulating the expression of cleaved caspase-3. Moreover, TRF modulated tyrosinase activity, resulting in a lowered rate of melanogenesis and reduced melanin production. In contrast, αTP did not exhibit significant protective effects against skin damages and pigmentation in BL-induced B16-F1 cells. Therefore, this study indicates that TRF may offer superior protective effects over αTP against the effects of BL on melanocytes. These findings demonstrate the potential of TRF as a protective natural ingredient that acts against BL-induced skin damages and hyperpigmentation via its anti-oxidative and anti-melanogenic properties.
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Affiliation(s)
- Juvenia Rui En Neo
- Research and Development Department, Davos Life Science, 3 Biopolis Drive, #04-19 Synapse, Singapore 138623, Singapore; (J.R.E.N.)
| | - Cheryl Wei Ling Teo
- Research and Development Department, Davos Life Science, 3 Biopolis Drive, #04-19 Synapse, Singapore 138623, Singapore; (J.R.E.N.)
| | - Yee Wei Ung
- Research and Development Department, KL-Kepong Oleomas (KLK Oleo), Level 8, Menara KLK, No 1, Jalan PJU 7/6, Mutiara Damansara, Petaling Jaya 47810, Malaysia;
| | - Wei Ney Yap
- Research and Development Department, Davos Life Science, 3 Biopolis Drive, #04-19 Synapse, Singapore 138623, Singapore; (J.R.E.N.)
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14
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Brown AD, Lynch K, Langelaan DN. The C-terminal transactivation domain of MITF interacts promiscuously with co-activator CBP/p300. Sci Rep 2023; 13:16094. [PMID: 37752231 PMCID: PMC10522771 DOI: 10.1038/s41598-023-43207-6] [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: 07/18/2023] [Accepted: 09/21/2023] [Indexed: 09/28/2023] Open
Abstract
The microphthalmia-associated transcription factor (MITF) is one of four closely related members of the MiT/TFE family (TFEB, TFE3, TFEC) that regulate a wide range of cellular processes. MITF is a key regulator of melanocyte-associated genes, and essential to proper development of the melanocyte cell lineage. Abnormal MITF activity can contribute to the onset of several diseases including melanoma, where MITF is an amplified oncogene. To enhance transcription, MITF recruits the co-activator CREB-binding protein (CBP) and its homolog p300 to gene promoters, however the molecular determinants of their interaction are not yet fully understood. Here, we characterize the interactions between the C-terminal MITF transactivation domain and CBP/p300. Using NMR spectroscopy, protein pulldown assays, and isothermal titration calorimetry we determine the C-terminal region of MITF is intrinsically disordered and binds with high-affinity to both TAZ1 and TAZ2 of CBP/p300. Mutagenesis studies revealed two conserved motifs within MITF that are necessary for TAZ2 binding and critical for MITF-dependent transcription of a reporter gene. Finally, we observe the transactivation potential of the MITF C-terminal region is reliant on the N-terminal transactivation domain for function. Taken together, our study helps elucidate the molecular details of how MITF interacts with CBP/p300 through multiple redundant interactions that lend insight into MITF function in melanocytes and melanoma.
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Affiliation(s)
- Alexandra D Brown
- Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, NS, B3H 4R2, Canada
| | - Kyle Lynch
- Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, NS, B3H 4R2, Canada
| | - David N Langelaan
- Department of Biochemistry and Molecular Biology, Dalhousie University, Halifax, NS, B3H 4R2, Canada.
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15
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Monmai C, Kim JS, Chin JH, Lee S, Baek SH. Inhibitory Effects of Polyphenol- and Flavonoid-Enriched Rice Seed Extract on Melanogenesis in Melan-a Cells via MAPK Signaling-Mediated MITF Downregulation. Int J Mol Sci 2023; 24:11841. [PMID: 37511600 PMCID: PMC10380342 DOI: 10.3390/ijms241411841] [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: 06/30/2023] [Revised: 07/21/2023] [Accepted: 07/21/2023] [Indexed: 07/30/2023] Open
Abstract
Melanin production is an important process that prevents the host skin from harmful ultraviolet radiation; however, an overproduction of melanin results in skin diseases. In the present study, we determined the antioxidative and anti-melanogenic activities of polyphenol- and flavonoid-enriched rice seed extracts in melan-a cells. The polyphenol and flavonoid content of Hopum (HP) and Sebok (SB) rice seed extracts was measured. The antioxidant capacity was determined using the ABTS radical scavenging method. SB contained high amounts of polyphenols and flavonoids, which significantly increased antioxidative activity compared with HP. Various concentrations of these extracts were evaluated in a cytotoxicity using melan-a cells. At 100 µg/mL, there was no significant difference for all treatments compared with untreated cells. Therefore, 100 µg/mL was selected as a concentration for the further experiments. SB significantly suppressed the phosphorylation/activation of p-38 MAPK, increased the expression of phosphorylated ERK 1/2 and Akt, and downregulated the microphthalmia-associated transcription factor (MITF). This resulted in decreased levels of tyrosinase and tyrosinase-related protein-1 and -2. These results indicate the potential of polyphenol- and flavonoid-enriched rice seed as a treatment for hyperpigmentation.
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Affiliation(s)
- Chaiwat Monmai
- Department of Agricultural Life Science, Sunchon National University, Suncheon 59722, Republic of Korea
| | - Jin-Suk Kim
- Department of Agricultural Life Science, Sunchon National University, Suncheon 59722, Republic of Korea
| | - Joong Hyoun Chin
- Department of Integrative Biological Sciences and Industry, Sejong University, Seoul 05006, Republic of Korea
| | - Sanghyun Lee
- Department of Plant Science and Technology, Chung-Ang University, Anseong 17546, Republic of Korea
| | - So-Hyeon Baek
- Department of Agricultural Life Science, Sunchon National University, Suncheon 59722, Republic of Korea
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16
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Li MX, Kang KW, Huang M, Cheng R, Wang W, Gao J, Wang J. Simple and rapid detection of tyrosinase activity with the adjustable light scattering properties of CoOOH nanoflakes. Anal Bioanal Chem 2023:10.1007/s00216-023-04710-x. [PMID: 37171584 DOI: 10.1007/s00216-023-04710-x] [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: 02/11/2023] [Revised: 03/18/2023] [Accepted: 03/28/2023] [Indexed: 05/13/2023]
Abstract
Tyrosinase (TYR), as an important biological enzyme, has been widely used in synthetic biology, medical hairdressing, environmental detection, biological sensors, and other fields. In clinical practice, tyrosinase activity is an important indicator for detecting melanoma. Therefore, the detection of tyrosinase activity is of great importance. Based on the polyphenol oxidase activity of tyrosinase, a simple and rapid detection method was proposed based on the adjustable light scattering properties of cobalt hydroxyl oxide nanoflakes (CoOOH NFs). It was found that the amount and size of CoOOH NFs decreased due to the redox reaction mediated by catechol (CC), resulting in a lower light scattering signal of CoOOH NFs. However, in the presence of tyrosinase, catechol was oxidized to a quinone structure, resulting in the reduced decomposition of CoOOH NFs and recovered light scattering signal, which was developed for the quantitative detection of tyrosinase activity. It was found that in the range of 10-400 U/L, the light scattering intensity was correlated linearly with tyrosinase activity, and the limit of detection was 6.71 U/L (3σ/k). To verify the feasibility of the proposed method in clinical samples, the spiked recovery experiments were carried out with human serum samples, which showed recovery rates between 93.0% and 104.6%, suggesting the high accuracy. The proposed assay provides a simple and rapid method for detection of a natural enzyme based on the adjustable light scattering properties of CoOOH nanoflakes, which lays the foundation for the development of various enzyme sensing applications in the future.
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Affiliation(s)
- Meng Xiao Li
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715, People's Republic of China
| | - Kai Wen Kang
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715, People's Republic of China
| | - Min Huang
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715, People's Republic of China
| | - Ru Cheng
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715, People's Republic of China
| | - Wei Wang
- The People's Hospital of Qingdao West Coast New Area, Qingdao, Shandong, 266499, People's Republic of China
| | - Jie Gao
- Department of Biological and Chemical Engineering, Chongqing University of Education, Chongqing, 400067, People's Republic of China
| | - Jian Wang
- Key Laboratory of Luminescence Analysis and Molecular Sensing (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing, 400715, People's Republic of China.
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17
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Yu F, Du Z, Zhong Z, Yu X, Chen J, Lu Y, Lin J. Creb2 involved in innate immunity by activating PpMitf-mediated melanogenesis in Pteria penguin. FISH & SHELLFISH IMMUNOLOGY 2023; 138:108809. [PMID: 37182797 DOI: 10.1016/j.fsi.2023.108809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2023] [Revised: 05/05/2023] [Accepted: 05/08/2023] [Indexed: 05/16/2023]
Abstract
cAMP response element binding protein 2 (CREB2) acts as an intracellular transcriptional factor and regulates many physiological processes, including melanogenesis and melanocyte differentiation. In our previous research, the Creb2 gene has been characterized from Pteria penguin (P. penguin), but its role and regulatory mechanism in P. penguin are still unclear. In this study, first, the function of PpCreb2 in melanogenesis and innate immunity were identified. PpCreb2 silencing significantly decreased the tyrosinase activity and melanin content, indicating PpCreb2 played an important role in melanogenesis. Meanwhile, PpCreb2 silencing visibly suppressed the antibacterial activity of hemolymph supernatant, indicating that PpCreb2 was involved in innate immunity of P. penguin. Second, the PpCreb2 was confirmed to perform immune function by regulating the melanogenesis. The decreased melanin oxidation product due to PpCreb2 silencing triggered the declining of antibacterial activity of hemolymph supernatant, which then could be rescued by adding exogenous melanin oxidation products. Third, the regulation pathway of PpCreb2 involved in innate immunity was analyzed. The promoter sequence analysis of PpMitf discovered 5 conserved cAMP response element (CRE), which were specifically recognized by basic Leucine zipper domain (bZIP) of upstream activation transcription factor. The luciferase activities analysis showed that PpCreb2 could activate the CRE in PpMitf promoter via highly conserved bZIP domain and regulate the expression of PpMitf, which further regulated the PpTyr expression. Therefore, the results collectively demonstrated that PpCreb2 participated in innate immunity by activating PpMitf-mediated melanogenesis in P. penguin.
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Affiliation(s)
- Feifei Yu
- Fishery College, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China; Academician Joint Laboratory of Germplasm Resource Exploitation, Utilization and Health Assessment for Aquatic Animal, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China
| | - Zexin Du
- Fishery College, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China
| | - Zhiming Zhong
- Fishery College, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China; Academician Joint Laboratory of Germplasm Resource Exploitation, Utilization and Health Assessment for Aquatic Animal, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China
| | - Xiangyong Yu
- Ocean College, South China Agriculture University, 483 Wushan Road, Tianhe District, Guangzhou, 510642, China
| | - Jiayu Chen
- Fishery College, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China; Academician Joint Laboratory of Germplasm Resource Exploitation, Utilization and Health Assessment for Aquatic Animal, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China
| | - Yishan Lu
- Fishery College, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China; Academician Joint Laboratory of Germplasm Resource Exploitation, Utilization and Health Assessment for Aquatic Animal, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China; Shenzhen Institute of Guangdong Ocean University, Shenzhen, 518120, China.
| | - Jinji Lin
- Fishery College, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China; Academician Joint Laboratory of Germplasm Resource Exploitation, Utilization and Health Assessment for Aquatic Animal, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China
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18
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Wu D, Bi X, Li P, Xu D, Qiu J, Li K, Zheng S, Chow KHM. Enhanced insulin-regulated phagocytic activities support extreme health span and longevity in multiple populations. Aging Cell 2023; 22:e13810. [PMID: 36883688 DOI: 10.1111/acel.13810] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 01/27/2023] [Accepted: 02/17/2023] [Indexed: 03/09/2023] Open
Abstract
The immune system plays a central role in many processes of age-related disorders and it remains unclear if the innate immune system may play roles in shaping extreme longevity. By an integrated analysis with multiple bulk and single cell transcriptomic, so as DNA methylomic datasets of white blood cells, a previously unappreciated yet commonly activated status of the innate monocyte phagocytic activities is identified. Detailed analyses revealed that the life cycle of these monocytes is enhanced and primed to a M2-like macrophage phenotype. Functional characterization unexpectedly revealed an insulin-driven immunometabolic network which supports multiple aspects of phagocytosis. Such reprogramming is associated to a skewed trend of DNA demethylation at the promoter regions of multiple phagocytic genes, so as a direct transcriptional effect induced by nuclear-localized insulin receptor. Together, these highlighted that preservation of insulin sensitivity is a key to healthy lifespan and extended longevity, via boosting the function of innate immune system in advanced ages.
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Affiliation(s)
- Deng Wu
- School of Life Sciences, Faculty of Science, The Chinese University of Hong Kong, Hong Kong
| | - Xiaoman Bi
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, College of Biomedical Information and Engineering, Hainan Medical University, Haikou, China.,Key Laboratory of Tropical Cardiovascular Diseases Research of Hainan Province, Tumor Institute of The First Affiliated Hospital, Hainan Women and Children Medical Center, Hainan Medical University, Haikou, China
| | - Peihu Li
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, College of Biomedical Information and Engineering, Hainan Medical University, Haikou, China
| | - Dahua Xu
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, College of Biomedical Information and Engineering, Hainan Medical University, Haikou, China
| | - Jianmin Qiu
- Key Laboratory of Tropical Cardiovascular Diseases Research of Hainan Province, Tumor Institute of The First Affiliated Hospital, Hainan Women and Children Medical Center, Hainan Medical University, Haikou, China
| | - Kongning Li
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, College of Biomedical Information and Engineering, Hainan Medical University, Haikou, China
| | - Shaojiang Zheng
- Key Laboratory of Tropical Cardiovascular Diseases Research of Hainan Province, Tumor Institute of The First Affiliated Hospital, Hainan Women and Children Medical Center, Hainan Medical University, Haikou, China
| | - Kim Hei-Man Chow
- School of Life Sciences, Faculty of Science, The Chinese University of Hong Kong, Hong Kong
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19
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Zhang J, Wang Z, Shi Y, Xia L, Hu Y, Zhong L. Protective effects of chlorogenic acid on growth, intestinal inflammation, hepatic antioxidant capacity, muscle development and skin color in channel catfish Ictalurus punctatus fed an oxidized fish oil diet. FISH & SHELLFISH IMMUNOLOGY 2023; 134:108511. [PMID: 36599381 DOI: 10.1016/j.fsi.2022.108511] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 12/22/2022] [Accepted: 12/26/2022] [Indexed: 06/17/2023]
Abstract
Under oxidative stress condition, the protective effects of dietary chlorogenic acid (CGA) supplementation on liver antioxidant capacity, intestinal inflammation and barrier function, muscle development and skin coloration in channel catfish Ictalurus punctatus were explored in the current study. With that purpose, I. punctatus were fed five experimental diets containing 2% fresh fish oil (FFO, 9.2 meqO2/kg) or 2% oxidized fish oil (OFO, 897.4 meqO2/kg) without or with CGA supplementation (0.02%, 0.04% and 0.08%) for 8 weeks. Upon comparative analysis, the oxidized fish oil consumption significantly lowered weight gain rate, decreased intestinal villi length and muscular thickness values and the tight junction proteins mRNA abundance, augmented the intestinal proinflammatory factors, attenuated hepatic antioxidant enzymes activities and related genes mRNA expression levels, influenced the myogenic regulatory factors expression profile and impacted the myocyte density, myocyte area values as well as the skin pigments contents compared to the FFO treatment. Collectively, long-term feeding of the oxidized fish oil diet suppressed the growth performance, destroyed intestinal structural integrity, caused intestinal inflammation and hepatic oxidative stress, impacted the skeletal development and skin color of I. punctatus. Whereas CGA supplementation in oxidized fish oil diets partially counteracted the negative effects of the oxidized fish oil on I. punctatus in terms of increasing the growth performance, improving the intestinal mucosal structure, alleviating hepatic oxidative stress and intestinal inflammation, recompiling the myogenic regulatory factors expression and improving skin color. In conclusion, CGA has great potential to be an aquatic feed additive.
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Affiliation(s)
- Junzhi Zhang
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, 410128, PR China
| | - Ziqing Wang
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, 410128, PR China
| | - Yong Shi
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, 410128, PR China
| | - Liqiu Xia
- College of Life Sciences, Hunan Normal University, Changsha, 410081, PR China
| | - Yi Hu
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, 410128, PR China.
| | - Lei Zhong
- College of Animal Science and Technology, Hunan Agricultural University, Changsha, 410128, PR China.
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A novel C6-sulfonated celastrol analog as a tyrosinase and melanin inhibitor: Design, synthesis, biological evaluation and molecular simulation. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
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Yu F, Chen J, Lin J, Zhong Z, Lu Y, Zeng X, Lei X. TLR4 involved in immune response against Vibrio Parahaemolyticus by MyD88-dependent pathway in Crassostrea hongkongensis. FISH & SHELLFISH IMMUNOLOGY 2023; 134:108591. [PMID: 36746228 DOI: 10.1016/j.fsi.2023.108591] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 12/27/2022] [Accepted: 02/03/2023] [Indexed: 06/18/2023]
Abstract
Vibrio parahaemolyticus (V. parahaemolyticus) is a salt-loving gram-negative bacterium, and is the leading cause of mortality in cultured shellfish in recent years. Toll-like Receptor 4 (TLR4) is a classical pattern recognition receptor (PRRs) that recognizes pathogen-associated molecular patterns (PAMPs) of pathogenic microorganism and activates the immune response. However, the function and signal pathway of TLR4 in oyster are still unknown. In this study, a new TLR4 gene was identified from the Crassostrea hongkongensis (C. hongkongensis). The ChTLR4 contained an open reading frame of 2643 bp, encoding 880 amino acids with seven leucine-rich repeat (LRR) domains and a Toll/IL-1R (TIR) domain. The ChTLR4 shared the highest sequence identity (83.0%) with TLR4 of Crassostrea gigas. Tissue expression analysis revealed that ChTLR4 showed the highest constitutive expression in the gill and hepatopancreas, and was significantly upregulated in immune tissues post V. parahaemolyticus infection, especially in gill and hemocytes. Moreover, TLR4 silencing significantly inhibited the immune-enzyme activities, including SOD, CAT, ACP, AKP in gill and LZM in hemolymph supernatant, and increased MDA content in hemolymph supernatant. Meanwhile, the antimicrobial activities of the hemolymph supernatant were also significantly inhibited by TLR4 silencing. These data demonstrated that the ChTLR4 involved in innate immune response of C. hongkongensis against V. parahaemolyticus challenge. Finally, qRT-PCR analysis showed that ChTLR4 silencing clearly inhibited the expression of genes in TLR4-MyD88 pathway, indicating that MyD88-dependent pathway played a crucial role in ChTLR4-mediated immune response against V. parahaemolyticus.
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Affiliation(s)
- Feifei Yu
- College of Fishery, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China; Academician Joint Laboratory of Germplasm Resource Exploitation, Utilization and Health Assessment for Aquatic Animal, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China
| | - Jiayu Chen
- College of Fishery, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China; Academician Joint Laboratory of Germplasm Resource Exploitation, Utilization and Health Assessment for Aquatic Animal, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China
| | - Jinji Lin
- College of Fishery, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China; Academician Joint Laboratory of Germplasm Resource Exploitation, Utilization and Health Assessment for Aquatic Animal, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China
| | - Zhiming Zhong
- College of Fishery, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China
| | - Yishan Lu
- College of Fishery, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China; Academician Joint Laboratory of Germplasm Resource Exploitation, Utilization and Health Assessment for Aquatic Animal, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China; Guangdong Provincial Engineering Research Center for Aquatic Animal Health Assessment, Shenzhen Public Service Platform for Evaluation of Marine Economic Animal Seedings, Shenzhen Institute of Guangdong Ocean University, Shenzhen, Guangdong, 518000, China.
| | - Xiangrong Zeng
- College of Fishery, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China
| | - Xiaoya Lei
- College of Fishery, Guangdong Ocean University, Zhanjiang, Guangdong, 524088, China
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MITF is a novel transcriptional regulator of the calcium sensor STIM1: Significance in physiological melanogenesis. J Biol Chem 2022; 298:102681. [PMID: 36356899 PMCID: PMC9723939 DOI: 10.1016/j.jbc.2022.102681] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 10/28/2022] [Accepted: 10/31/2022] [Indexed: 11/09/2022] Open
Abstract
Stromal Interaction Molecule1 (STIM1) is an endoplasmic reticulum membrane-localized calcium (Ca2+) sensor that plays a critical role in the store-operated Ca2+ entry (SOCE) pathway. STIM1 regulates a variety of physiological processes and contributes to a plethora of pathophysiological conditions. Several disease states and enhanced biological phenomena are associated with increased STIM1 levels and activity. However, molecular mechanisms driving STIM1 expression remain largely unappreciated. We recently reported that STIM1 expression augments during pigmentation. Nonetheless, the molecular choreography regulating STIM1 expression in melanocytes is completely unexplored. Here, we characterized the molecular events that regulate STIM1 expression during pigmentation. We demonstrate that physiological melanogenic stimuli α-melanocyte stimulating hormone (αMSH) increases STIM1 mRNA and protein levels. Further, αMSH stimulates STIM1 promoter-driven luciferase activity, thereby suggesting transcriptional upregulation of STIM1. We show that downstream of αMSH, microphthalmia-associated transcription factor (MITF) drives STIM1 expression. By performing knockdown and overexpression studies, we corroborated that MITF regulates STIM1 expression and SOCE. Next, we conducted extensive bioinformatics analysis and identified MITF-binding sites on the STIM1 promoter. We validated significance of the MITF-binding sites in controlling STIM1 expression by performing ChIP and luciferase assays with truncated STIM1 promoters. Moreover, we confirmed MITF's role in regulating STIM1 expression and SOCE in primary human melanocytes. Importantly, analysis of publicly available datasets substantiates a positive correlation between STIM1 and MITF expression in sun-exposed tanned human skin, thereby highlighting physiological relevance of this regulation. Taken together, we have identified a novel physiologically relevant molecular pathway that transcriptionally enhances STIM1 expression.
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Bayazid AB, Jang YA, Jeong SA, Lim BO. Cypress tree ( Chamaecyparis obtusa) Bark extract inhibits melanogenesis through repressing CREB and MITF signalling pathways in α-MSH-stimulated B16F10 cells. FOOD AGR IMMUNOL 2022. [DOI: 10.1080/09540105.2022.2095986] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Affiliation(s)
- Al Borhan Bayazid
- Department of Applied Life Science, Konkuk University, Chungju, South Korea
| | - Young Ah Jang
- Convergence Research Center for Smart Healthcare, R&DB Foundation of Kyungsung University, Busan, South Korea
| | - Soo Ah Jeong
- Department of Applied Life Science, Konkuk University, Chungju, South Korea
| | - Beong Ou Lim
- Department of Applied Life Science, Konkuk University, Chungju, South Korea
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