Pub Date : 2023-12-01DOI: 10.1016/j.jdermsci.2023.10.003
Xueshan Du , Delu Che , Bin Peng , Yi Zheng , Yong Hao , Tao Jia , Xinyue Zhang , Songmei Geng
Background
Topical tacrolimus, although widely used in the treatment of dermatoses, presents with an immediate irritation on initial application resembling a pseudo-allergic reaction. Mas-related G protein-coupled receptor X2 (MRGPRX2) in mast cells (MCs) mediates drug-induced pseudo-allergic reaction and immunoglobulin E (IgE)-independent pruritis in chronic skin diseases. However, the immunosuppression mechanism of tacrolimus on MCs via MRGPRX2 has not been reported.
Objective
To investigate the role of MRGPRX2 and the mechanism of action of tacrolimus on its short-term and long-term applications.
Methods
Wild-type mice, KitW-sh/W-sh mice, and MrgprB2-deficient (MUT) mice were used to study the effect of tacrolimus on in vivo anaphylaxis model. LAD2 cells and MRGPRX2-knockdown LAD2 cells were specifically used to derive the associated mechanism of the tacrolimus effect.
Results
Short-term application of tacrolimus triggers IgE-independent activation of MCs via MRGPRX2/B2 in both in vivo and in vitro experiments. Tacrolimus binds to MRGPRX2, which was verified by fluorescently labeled tacrolimus in cells. On long-term treatment with tacrolimus, the initial allergic reaction fades away corresponding with the downregulation of MRGPRX2, which leads to decreased release of inflammatory cytokines (P < 0.05 to P < 0.001).
Conclusion
Short-term treatment with tacrolimus induces pseudo-allergic reaction via MRGPRX2/B2 in MCs, whereas long-term treatment downregulates expression of MRGPRX2/B2, which may contribute to its potent immunosuppressive effect in the treatment of various skin diseases.
{"title":"Dual effect of tacrolimus on mast cell–mediated allergy and inflammation through Mas-related G protein-coupled receptor X2","authors":"Xueshan Du , Delu Che , Bin Peng , Yi Zheng , Yong Hao , Tao Jia , Xinyue Zhang , Songmei Geng","doi":"10.1016/j.jdermsci.2023.10.003","DOIUrl":"10.1016/j.jdermsci.2023.10.003","url":null,"abstract":"<div><h3>Background</h3><p><span><span>Topical tacrolimus<span>, although widely used in the treatment of </span></span>dermatoses<span>, presents with an immediate irritation on initial application resembling a pseudo-allergic reaction. Mas-related G protein-coupled receptor X2 (MRGPRX2) in mast cells (MCs) mediates drug-induced pseudo-allergic reaction and immunoglobulin E (IgE)-independent pruritis in chronic skin diseases. However, the immunosuppression mechanism of tacrolimus on MCs </span></span><em>via</em> MRGPRX2 has not been reported.</p></div><div><h3>Objective</h3><p>To investigate the role of MRGPRX2 and the mechanism of action of tacrolimus on its short-term and long-term applications.</p></div><div><h3>Methods</h3><p>Wild-type mice, Kit<sup>W-sh/W-sh</sup> mice, and MrgprB2-deficient (MUT) mice were used to study the effect of tacrolimus on <em>in vivo</em> anaphylaxis model. LAD2 cells and MRGPRX2-knockdown LAD2 cells were specifically used to derive the associated mechanism of the tacrolimus effect.</p></div><div><h3>Results</h3><p>Short-term application of tacrolimus triggers IgE-independent activation of MCs <em>via</em> MRGPRX2/B2 in both <em>in vivo</em> and <em>in vitro</em><span> experiments. Tacrolimus binds to MRGPRX2, which was verified by fluorescently labeled tacrolimus in cells. On long-term treatment with tacrolimus, the initial allergic reaction fades away corresponding with the downregulation of MRGPRX2, which leads to decreased release of inflammatory cytokines (</span><em>P</em> < 0.05 to <em>P</em> < 0.001).</p></div><div><h3>Conclusion</h3><p>Short-term treatment with tacrolimus induces pseudo-allergic reaction <em>via</em><span> MRGPRX2/B2 in MCs, whereas long-term treatment downregulates expression of MRGPRX2/B2, which may contribute to its potent immunosuppressive effect in the treatment of various skin diseases.</span></p></div>","PeriodicalId":94076,"journal":{"name":"Journal of dermatological science","volume":"112 3","pages":"Pages 128-137"},"PeriodicalIF":4.6,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89721335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Advanced glycation end products (AGEs) promote melanogenesis through activating NLRP3 inflammasome in fibroblasts. Although A20 has been highlighted to inhibit NLRP3 inflammasome activation, its roles and mechanisms remain elusive in photoaging-associated pigmentation.
Objectives
To determine the significance of fibroblast A20 in AGEs-induced NLRP3 inflammasome activation and pigmentation.
Methods
The correlation between A20 and AGEs or melanin was studied in sun-exposed skin and lesions of melasma and solar lentigo. We then investigated A20 level in AGEs-treated fibroblast and the effect of fibroblast A20 overexpression or knockdown on AGEs-BSA-induced NLRP3 inflammasome activation and pigmentation, respectively. Finally, the severity of NLRP3 inflammasome activation and pigmentation was evaluated after mice were injected intradermally with A20-overexpression adeno-associated virus and AGEs-BSA.
Results
Dermal A20 expression was decreased and exhibited negative correlation with either dermal AGEs deposition or epidermal melanin level in sun-exposed skin and pigmentary lesions. Moreover, both AGEs-BSA and AGEs-collagen robustly decreased A20 expression via binding to RAGE in fibroblasts. Further, A20 overexpression or depletion significantly decreased or augmented AGEs-BSA-induced activation of NF-κB pathway and NLRP3 inflammasome and IL-18 production and secretion in fibroblasts, respectively. Importantly, fibroblast A20 potently repressed AGEs-BSA-stimulated melanin content,tyrosinase activity,and expression of microphthalmia-associated transcription factor and tyrosinase in melanocytes. Particularly, fibroblast A20 significantly abrogated AGEs-BSA-promoted melanogenesis in ex vivo skin and mouse models. Additionally, fibroblast A20 inhibited AGEs-BSA-activated MAPKs in melanocytes and the epidermis of ex vivo skin.
Conclusions
Fibroblast A20 suppresses AGEs-stimulate melanogenesis in photoaging-associated hyperpigmentation disorders by inhibiting NLRP3 inflammasome activation.
{"title":"A20 ameliorates advanced glycation end products-induced melanogenesis by inhibiting NLRP3 inflammasome activation in human dermal fibroblasts","authors":"Mengyao Wang , Xianyin Huang , Mengting Ouyang , Jingjing Lan, Jingqian Huang, Hongpeng Li, Wei Lai, Yifeng Gao, Qingfang Xu","doi":"10.1016/j.jdermsci.2023.09.002","DOIUrl":"10.1016/j.jdermsci.2023.09.002","url":null,"abstract":"<div><h3>Background</h3><p>Advanced glycation end products (AGEs) promote melanogenesis through activating NLRP3 inflammasome in fibroblasts. Although A20 has been highlighted to inhibit NLRP3 inflammasome activation, its roles and mechanisms remain elusive in photoaging-associated pigmentation.</p></div><div><h3>Objectives</h3><p>To determine the significance of fibroblast A20 in AGEs-induced NLRP3 inflammasome activation and pigmentation.</p></div><div><h3>Methods</h3><p>The correlation between A20 and AGEs or melanin was studied in sun-exposed skin and lesions of melasma and solar lentigo. We then investigated A20 level in AGEs-treated fibroblast and the effect of fibroblast A20 overexpression or knockdown on AGEs-BSA-induced NLRP3 inflammasome activation and pigmentation, respectively. Finally, the severity of NLRP3 inflammasome activation and pigmentation was evaluated after mice were injected intradermally with A20-overexpression adeno-associated virus and AGEs-BSA.</p></div><div><h3>Results</h3><p>Dermal A20 expression was decreased and exhibited negative correlation with either dermal AGEs deposition or epidermal melanin level in sun-exposed skin and pigmentary lesions. Moreover, both AGEs-BSA and AGEs-collagen robustly decreased A20 expression via binding to RAGE in fibroblasts. Further, A20 overexpression or depletion significantly decreased or augmented AGEs-BSA-induced activation of NF-κB pathway and NLRP3 inflammasome and IL-18 production and secretion in fibroblasts, respectively. Importantly, fibroblast A20 potently repressed AGEs-BSA-stimulated melanin content,tyrosinase activity,and expression of microphthalmia-associated transcription factor and tyrosinase in melanocytes. Particularly, fibroblast A20 significantly abrogated AGEs-BSA-promoted melanogenesis in <em>ex vivo</em> skin and mouse models. Additionally, fibroblast A20 inhibited AGEs-BSA-activated MAPKs in melanocytes and the epidermis of <em>ex vivo</em> skin.</p></div><div><h3>Conclusions</h3><p>Fibroblast A20 suppresses AGEs-stimulate melanogenesis in photoaging-associated hyperpigmentation disorders by inhibiting NLRP3 inflammasome activation.</p></div>","PeriodicalId":94076,"journal":{"name":"Journal of dermatological science","volume":"112 2","pages":"Pages 71-82"},"PeriodicalIF":4.6,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41173262","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.1016/j.jdermsci.2023.08.006
Taihao Quan
Human skin is the most widespread and abundant type of tissue in the human body. With the passage of time, most of our organs, including a substantial part of the skin, tend to undergo a gradual thinning or decrease in size. As we age, there is a gradual and progressive reduction in the thickness of both the epidermis and dermis layers of our skin. This is primarily attributed to the decline of epidermal stem cells and the loss of dermal collagen, which is the most abundant protein in the human body. Age-related alterations of the epidermis and dermis impair skin structure/function and create a tissue microenvironment that promotes age-related skin diseases, such as impaired skin barrier, delayed wound healing, and skin cancer development. This review will examine the current body of literature pertaining to our knowledge of skin epidermal and dermal aging.
{"title":"Molecular insights of human skin epidermal and dermal aging","authors":"Taihao Quan","doi":"10.1016/j.jdermsci.2023.08.006","DOIUrl":"10.1016/j.jdermsci.2023.08.006","url":null,"abstract":"<div><p>Human skin is the most widespread and abundant type of tissue in the human body. With the passage of time, most of our organs, including a substantial part of the skin, tend to undergo a gradual thinning or decrease in size. As we age, there is a gradual and progressive reduction in the thickness of both the epidermis and dermis<span><span> layers of our skin. This is primarily attributed to the decline of epidermal stem cells<span> and the loss of dermal collagen, which is the most abundant protein in the human body. Age-related alterations of the epidermis and dermis impair skin structure/function and create a tissue microenvironment that promotes age-related skin diseases, such as impaired skin barrier, </span></span>delayed wound healing, and skin cancer development. This review will examine the current body of literature pertaining to our knowledge of skin epidermal and dermal aging.</span></p></div>","PeriodicalId":94076,"journal":{"name":"Journal of dermatological science","volume":"112 2","pages":"Pages 48-53"},"PeriodicalIF":4.6,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10137286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Transient receptor potential vanilloid 4 (TRPV4), a cation ion channel, is expressed in different cells, and it regulates the development of different diseases. We recently found a high TRPV4 expression in the wounded skin area. However, the role of TRPV4 in cutaneous wound healing is unknown.
Objective
To investigate the role of TRPV4 in cutaneous wound healing in a mouse model.
Methods
Skin wound healing experiment and histopathological studies were performed between WT and TRPV4 KO mice. The effect of TRPV4 antagonist and agonist on cell migration, proliferation, and differentiation were examined in vitro.
Results
TRPV4 expression was enhanced in wounded area in the skin. TRPV4 KO mice had impaired cutaneous wound healing compared with the WT mice. Further, they had significantly suppressed re-epithelialization and formation of granulation tissue, amount of collagen deposition, and number of α-SMA-positive myofibroblasts in skin wounds. qPCR revealed that the KO mice had decreased mRNA expression of COL1A1 and ACTA2 in skin wounds. In vitro, treatment with selective TRPV4 antagonist suppressed migrating capacity, scratch stimulation enhanced the expression of phospho-ERK in keratinocytes, and TGF-β stimulation enhanced the mRNA expression of COL1A1 and ACTA2 in fibroblasts. Selective TRPV4 agonist suppressed cell migration in keratinocytes, and did not enhance proliferation and migration, but promoted differentiation in fibroblasts.
Conclusion
TRPV4 mediates keratinocytes and fibroblasts migration and increases collagen deposition in the wound area, thereby promoting cutaneous wound healing.
{"title":"Transient receptor potential vanilloid 4 promotes cutaneous wound healing by regulating keratinocytes and fibroblasts migration and collagen production in fibroblasts in a mouse model","authors":"Bayarmaa Taivanbat , Sahori Yamazaki , Bolor Nasanbat , Akihiko Uchiyama , Syahla Nisaa Amalia , Munkhjargal Nasan-Ochir , Yuta Inoue , Mai Ishikawa , Keiji Kosaka , Akiko Sekiguchi , Sachiko Ogino , Yoko Yokoyama , Ryoko Torii , Mari Hosoi , Koji Shibasaki , Sei-ichiro Motegi","doi":"10.1016/j.jdermsci.2023.10.002","DOIUrl":"10.1016/j.jdermsci.2023.10.002","url":null,"abstract":"<div><h3>Background</h3><p>Transient receptor potential vanilloid 4 (TRPV4), a cation ion channel, is expressed in different cells, and it regulates the development of different diseases. We recently found a high TRPV4 expression in the wounded skin area. However, the role of TRPV4 in cutaneous wound healing is unknown.</p></div><div><h3>Objective</h3><p>To investigate the role of TRPV4 in cutaneous wound healing in a mouse model.</p></div><div><h3>Methods</h3><p>Skin wound healing experiment and histopathological studies were performed between WT and TRPV4 KO mice. The effect of TRPV4 antagonist and agonist on cell migration, proliferation, and differentiation were examined in vitro.</p></div><div><h3>Results</h3><p><span>TRPV4 expression was enhanced in wounded area in the skin. TRPV4 KO mice had impaired cutaneous wound healing compared with the WT mice. Further, they had significantly suppressed re-epithelialization and formation of granulation tissue, amount of collagen deposition, and number of α-SMA-positive myofibroblasts in skin wounds. qPCR revealed that the KO mice had decreased mRNA expression of COL1A1 and ACTA2 in skin wounds. </span><em>In vitro</em><span><span>, treatment with selective TRPV4 antagonist suppressed migrating capacity, scratch stimulation enhanced the expression of phospho-ERK in </span>keratinocytes, and TGF-β stimulation enhanced the mRNA expression of COL1A1 and ACTA2 in fibroblasts. Selective TRPV4 agonist suppressed cell migration in keratinocytes, and did not enhance proliferation and migration, but promoted differentiation in fibroblasts.</span></p></div><div><h3>Conclusion</h3><p>TRPV4 mediates keratinocytes and fibroblasts migration and increases collagen deposition in the wound area, thereby promoting cutaneous wound healing.</p></div>","PeriodicalId":94076,"journal":{"name":"Journal of dermatological science","volume":"112 2","pages":"Pages 54-62"},"PeriodicalIF":4.6,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41242652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Presence of microfibril associated glycoprotein 4 and type V collagen and the possible absence of fibrillin-1 in bead-like structures in elastofibroma","authors":"Haruto Nishida , Takako Sasaki , Yuki Taga , Yusuke Murasawa , Siro Simizu , Shigeto Matsushita , Zenzo Isogai , Shunji Hattori , Tsutomu Daa , Nobuo Nagamine , Akihiro Sekine , Sakuhei Fujiwara","doi":"10.1016/j.jdermsci.2023.09.005","DOIUrl":"10.1016/j.jdermsci.2023.09.005","url":null,"abstract":"","PeriodicalId":94076,"journal":{"name":"Journal of dermatological science","volume":"112 2","pages":"Pages 112-116"},"PeriodicalIF":4.6,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50164209","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-01DOI: 10.1016/j.jdermsci.2023.10.001
Shilpa Kuttikrishnan , Tariq Masoodi , Fareed Ahmad , Gulab Sher , Kirti S. Prabhu , Jericha M. Mateo , Joerg Buddenkotte , Tamam El-Elimat , Nicholas H. Oberlies , Cedric J. Pearce , Ajaz A. Bhat , Feras Q. Alali , Martin Steinhoff , Shahab Uddin
Background
Cutaneous T cell lymphoma (CTCL) is a T cell-derived non-Hodgkin lymphoma primarily affecting the skin, with treatment posing a significant challenge and low survival rates.
Objective
In this study, we investigated the anti-cancer potential of Neosetophomone B (NSP-B), a fungal-derived secondary metabolite, on CTCL cell lines H9 and HH.
Methods
Cell viability was measured using Cell counting Kit-8 (CCK8) assays. Apoptosis was measured by annexin V/PI dual staining. Immunoblotting was performed to examine the expression of proteins. Applied Biosystems' high-resolution Human Transcriptome Array 2.0 was used to examine gene expression.
Results
NSP-B induced apoptosis in CTCL cells by activating mitochondrial signaling pathways and caspases. We observed downregulated expression of BUB1B, Aurora Kinases A and B, cyclin-dependent kinases (CDKs) 4 and 6, and polo-like kinase 1 (PLK1) in NSP-B treated cells, which was further corroborated by Western blot analysis. Notably, higher expression levels of these genes showed reduced overall and progression-free survival in the CTCL patient cohort. FOXM1 and BUB1B expression exhibited a dose-dependent reduction in NSP-B-treated CTCL cells.FOXM1 silencing decreased cell viability and increased apoptosis via BUB1B downregulation. Moreover, NSP-B suppressed FOXM1-regulated genes, such as Aurora Kinases A and B, CDKs 4 and 6, and PLK1. The combined treatment of Bortezomib and NSP-B showed greater efficacy in reducing CTCL cell viability and promoting apoptosis compared to either treatment alone.
Conclusion
Our findings suggest that targeting the FOXM1 pathway may provide a promising therapeutic strategy for CTCL management, with NSP-B offering significant potential as a novel treatment option.
{"title":"In vitro evaluation of Neosetophomone B inducing apoptosis in cutaneous T cell lymphoma by targeting the FOXM1 signaling pathway","authors":"Shilpa Kuttikrishnan , Tariq Masoodi , Fareed Ahmad , Gulab Sher , Kirti S. Prabhu , Jericha M. Mateo , Joerg Buddenkotte , Tamam El-Elimat , Nicholas H. Oberlies , Cedric J. Pearce , Ajaz A. Bhat , Feras Q. Alali , Martin Steinhoff , Shahab Uddin","doi":"10.1016/j.jdermsci.2023.10.001","DOIUrl":"10.1016/j.jdermsci.2023.10.001","url":null,"abstract":"<div><h3>Background</h3><p>Cutaneous T cell lymphoma<span> (CTCL) is a T cell-derived non-Hodgkin lymphoma primarily affecting the skin, with treatment posing a significant challenge and low survival rates.</span></p></div><div><h3>Objective</h3><p>In this study, we investigated the anti-cancer potential of Neosetophomone B (NSP-B), a fungal-derived secondary metabolite, on CTCL cell lines H9 and HH.</p></div><div><h3>Methods</h3><p><span><span>Cell viability was measured using Cell counting Kit-8 (CCK8) assays. </span>Apoptosis<span> was measured by annexin V/PI dual staining. Immunoblotting was performed to examine the expression of proteins. Applied Biosystems' high-resolution Human </span></span>Transcriptome Array 2.0 was used to examine gene expression.</p></div><div><h3>Results</h3><p><span><span>NSP-B induced apoptosis in CTCL cells by activating mitochondrial signaling pathways and </span>caspases<span>. We observed downregulated expression of BUB1B, Aurora Kinases A and B, cyclin-dependent kinases (CDKs) 4 and 6, and polo-like kinase 1 (PLK1) in NSP-B treated cells, which was further corroborated by Western blot analysis. Notably, higher expression levels of these genes showed reduced overall and progression-free survival in the CTCL patient cohort. FOXM1 and BUB1B expression exhibited a dose-dependent reduction in NSP-B-treated CTCL cells.FOXM1 silencing decreased cell viability and increased apoptosis via BUB1B downregulation. Moreover, NSP-B suppressed FOXM1-regulated genes, such as Aurora Kinases A and B, CDKs 4 and 6, and PLK1. The combined treatment of </span></span>Bortezomib and NSP-B showed greater efficacy in reducing CTCL cell viability and promoting apoptosis compared to either treatment alone.</p></div><div><h3>Conclusion</h3><p>Our findings suggest that targeting the FOXM1 pathway may provide a promising therapeutic strategy for CTCL management, with NSP-B offering significant potential as a novel treatment option.</p></div>","PeriodicalId":94076,"journal":{"name":"Journal of dermatological science","volume":"112 2","pages":"Pages 83-91"},"PeriodicalIF":4.6,"publicationDate":"2023-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49686677","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}