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Tierney MT, Polak L, Yang Y, Abdusselamoglu MD, Baek I, Stewart KS, Fuchs E. Vitamin A resolves lineage plasticity to orchestrate stem cell lineage choices. Science 2024; 383:eadi7342. [PMID: 38452090 DOI: 10.1126/science.adi7342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 02/07/2024] [Indexed: 03/09/2024]
Abstract
Lineage plasticity-a state of dual fate expression-is required to release stem cells from their niche constraints and redirect them to tissue compartments where they are most needed. In this work, we found that without resolving lineage plasticity, skin stem cells cannot effectively generate each lineage in vitro nor regrow hair and repair wounded epidermis in vivo. A small-molecule screen unearthed retinoic acid as a critical regulator. Combining high-throughput approaches, cell culture, and in vivo mouse genetics, we dissected its roles in tissue regeneration. We found that retinoic acid is made locally in hair follicle stem cell niches, where its levels determine identity and usage. Our findings have therapeutic implications for hair growth as well as chronic wounds and cancers, where lineage plasticity is unresolved.
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Affiliation(s)
- Matthew T Tierney
- Howard Hughes Medical Institute, Robin Chemers Neustein Laboratory of Mammalian Cell Biology and Development, The Rockefeller University, New York, NY 10065, USA
| | - Lisa Polak
- Howard Hughes Medical Institute, Robin Chemers Neustein Laboratory of Mammalian Cell Biology and Development, The Rockefeller University, New York, NY 10065, USA
| | - Yihao Yang
- Howard Hughes Medical Institute, Robin Chemers Neustein Laboratory of Mammalian Cell Biology and Development, The Rockefeller University, New York, NY 10065, USA
| | - Merve Deniz Abdusselamoglu
- Howard Hughes Medical Institute, Robin Chemers Neustein Laboratory of Mammalian Cell Biology and Development, The Rockefeller University, New York, NY 10065, USA
| | - Inwha Baek
- Howard Hughes Medical Institute, Robin Chemers Neustein Laboratory of Mammalian Cell Biology and Development, The Rockefeller University, New York, NY 10065, USA
| | - Katherine S Stewart
- Howard Hughes Medical Institute, Robin Chemers Neustein Laboratory of Mammalian Cell Biology and Development, The Rockefeller University, New York, NY 10065, USA
| | - Elaine Fuchs
- Howard Hughes Medical Institute, Robin Chemers Neustein Laboratory of Mammalian Cell Biology and Development, The Rockefeller University, New York, NY 10065, USA
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2
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Dodamani MH, Lila AR, Memon SS, Sarathi V, Arya S, Rane A, Sehemby MK, Garg R, Bhandare VV, Karlekar M, Patil VA, Kunwar A, Bandgar TR. Genotypic Spectrum and its Correlation with Alopecia and Clinical Response in Hereditary Vitamin D Resistant Rickets: Our Experience and Systematic Review. Calcif Tissue Int 2023; 112:483-492. [PMID: 36705686 DOI: 10.1007/s00223-023-01061-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 01/14/2023] [Indexed: 01/28/2023]
Abstract
Alopecia in hereditary vitamin D resistant rickets (HVDRR) has some correlation with severe rickets and poor overall response. However, these observations are based on small series. Hence, we aim to assess the genotypic spectrum of HVDRR and its correlation with alopecia and clinical response. Seven genetically-proven HVDDR patients from five unrelated families and 119 probands from systematic review were analysed retrospectively for phenotypic and genotypic data and overall response to therapy. In our cohort mean age at rickets onset was 12 (± 3.4) months. Alopecia was present in all patients but one. All patients had poor overall response to oral high-dose calcium and calcitriol and most required intravenous calcium. Genetic analyses revealed four novel variants. On systematic review, alopecia was present in majority (81.5%) and preceded the onset of rickets. Patients with alopecia had higher serum calcium (7.6 vs.6.9 mg/dl, p = 0.008), lower 1, 25(OH)2 D (200 vs.320 pg/ml, p = 0.03) and similar overall response to oral therapy (28.7% vs. 35.3%, p = 0.56). Alopecia was present in 51.4% of non-truncating (NT) ligand-binding domain (LBD) variants, whereas it was universal in truncating LBD and all DNA binding-domain (DBD) variants. Overall response to oral therapy was highest in LBD-NT (46.4%) as compared to 7.6% in LBD-truncating and 19% in DBD-NT variants. Among LBD-NT variants, those affecting RXR heterodimerization, but not those affecting ligand affinity, were associated with alopecia. Both alopecia and overall response have genotypic correlation. Age at diagnosis and overall response to oral therapy were similar between patients with and without alopecia in genetically proven HVDRR.
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Affiliation(s)
- Manjunath Havalappa Dodamani
- Department of Endocrinology, Seth G.S Medical College & KEM Hospital, Parel, Mumbai, Maharashtra, 4000012, India
| | - Anurag Ranjan Lila
- Department of Endocrinology, Seth G.S Medical College & KEM Hospital, Parel, Mumbai, Maharashtra, 4000012, India
| | - Saba Samad Memon
- Department of Endocrinology, Seth G.S Medical College & KEM Hospital, Parel, Mumbai, Maharashtra, 4000012, India.
| | - Vijaya Sarathi
- Department of Endocrinology, Vydehi Institute of Medical Sciences and Research Centre, Bangalore, Karnataka, India
| | - Sneha Arya
- Department of Endocrinology, Seth G.S Medical College & KEM Hospital, Parel, Mumbai, Maharashtra, 4000012, India
| | - Ankita Rane
- Department of Endocrinology, Seth G.S Medical College & KEM Hospital, Parel, Mumbai, Maharashtra, 4000012, India
| | - Manjeet Kaur Sehemby
- Department of Endocrinology, Seth G.S Medical College & KEM Hospital, Parel, Mumbai, Maharashtra, 4000012, India
| | - Robin Garg
- Department of Endocrinology, Seth G.S Medical College & KEM Hospital, Parel, Mumbai, Maharashtra, 4000012, India
| | | | - Manjiri Karlekar
- Department of Endocrinology, Seth G.S Medical College & KEM Hospital, Parel, Mumbai, Maharashtra, 4000012, India
| | - Virendra A Patil
- Department of Endocrinology, Seth G.S Medical College & KEM Hospital, Parel, Mumbai, Maharashtra, 4000012, India
| | - Ambarish Kunwar
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Mumbai, India
| | - Tushar R Bandgar
- Department of Endocrinology, Seth G.S Medical College & KEM Hospital, Parel, Mumbai, Maharashtra, 4000012, India
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3
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Määttä A, Nixon R, Robinson N, Ambler CA, Goncalves K, Maltman V, Przyborski S. Regulation of epidermal proliferation and hair follicle cycling by synthetic photostable retinoid EC23. J Cosmet Dermatol 2023; 22:1658-1669. [PMID: 36718827 DOI: 10.1111/jocd.15629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 12/22/2022] [Accepted: 01/03/2023] [Indexed: 02/01/2023]
Abstract
BACKGROUND Retinoid signaling is an important regulator of the epidermis and skin appendages. Therefore, synthetic retinoids have been developed for therapeutic use for skin disorders such as psoriasis and acne. AIMS In previous studies, we showed how the photostable retinoid EC23 induces neuronal differentiation in stem cell-like cell populations, and here, we aim to investigate its ability to influence epidermal and hair follicle growth. METHODS EC23 influence on skin biology was investigated initially in cultures of monolayer keratinocytes and three-dimentional in vitro models of skin, and finally in in vivo studies of mice back skin. RESULTS EC23 induces keratinocyte hyperproliferation in vitro and in vivo, and when applied to mouse skin increases the number of involucrin-positive suprabasal cell layers. These phenotypic changes are similar in skin treated with the natural retinoid all-trans retinoic acid (ATRA); however, EC23 is more potent; a tenfold lower dose of EC23 is sufficient to induce epidermal thickening, and resulting hyperproliferation is sustained for a longer time period after first dose. EC23 treatment resulted in a disorganized stratum corneum, reduced cell surface lipids and compromised barrier, similar to ATRA treatment. However, EC23 induces a rapid telogen to anagen transition and hair re-growth in 6-week-old mice with synchronously resting back skin follicles. The impact of EC23 on the hair cycle was surprising as similar results have not been seen with ATRA. CONCLUSIONS These data suggest that synthetic retinoid EC23 is a useful tool in exploring the turnover and differentiation of cells and has a potent effect on skin physiology.
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Affiliation(s)
- Arto Määttä
- Department of Biosciences, Durham University, Durham, UK
| | - Rebecca Nixon
- Department of Biosciences, Durham University, Durham, UK
| | - Neil Robinson
- Department of Biosciences, Durham University, Durham, UK
| | | | | | | | - Stefan Przyborski
- Department of Biosciences, Durham University, Durham, UK.,Reprocell Europe Ltd, West of Scotland Science Park, Glasgow, UK
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Ramchatesingh B, Martínez Villarreal A, Arcuri D, Lagacé F, Setah SA, Touma F, Al-Badarin F, Litvinov IV. The Use of Retinoids for the Prevention and Treatment of Skin Cancers: An Updated Review. Int J Mol Sci 2022; 23:ijms232012622. [PMID: 36293471 PMCID: PMC9603842 DOI: 10.3390/ijms232012622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 10/12/2022] [Accepted: 10/13/2022] [Indexed: 11/21/2022] Open
Abstract
Retinoids are natural and synthetic vitamin A derivatives that are effective for the prevention and the treatment of non-melanoma skin cancers (NMSC). NMSCs constitute a heterogenous group of non-melanocyte-derived skin cancers that impose substantial burdens on patients and healthcare systems. They include entities such as basal cell carcinoma and cutaneous squamous cell carcinoma (collectively called keratinocyte carcinomas), cutaneous lymphomas and Kaposi’s sarcoma among others. The retinoid signaling pathway plays influential roles in skin physiology and pathology. These compounds regulate diverse biological processes within the skin, including proliferation, differentiation, angiogenesis and immune regulation. Collectively, retinoids can suppress skin carcinogenesis. Both topical and systemic retinoids have been investigated in clinical trials as NMSC prophylactics and treatments. Desirable efficacy and tolerability in clinical trials have prompted health regulatory bodies to approve the use of retinoids for NMSC management. Acceptable off-label uses of these compounds as drugs for skin cancers are also described. This review is a comprehensive outline on the biochemistry of retinoids, their activities in the skin, their effects on cancer cells and their adoption in clinical practice.
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Affiliation(s)
| | | | - Domenico Arcuri
- Faculty of Medicine and Health Sciences, McGill University, Montreal, QC H4A 3J1, Canada
| | - François Lagacé
- Faculty of Medicine and Health Sciences, McGill University, Montreal, QC H4A 3J1, Canada
- Division of Dermatology, McGill University Health Center, Montreal, QC H4A 3J1, Canada
| | - Samy Abu Setah
- Faculty of Medicine and Health Sciences, McGill University, Montreal, QC H4A 3J1, Canada
| | - Fadi Touma
- Faculty of Medicine and Health Sciences, McGill University, Montreal, QC H4A 3J1, Canada
| | - Faris Al-Badarin
- Faculté de Médicine, Université Laval, Québec, QC G1V 0V6, Canada
| | - Ivan V. Litvinov
- Division of Experimental Medicine, McGill University, Montreal, QC H4A 3J1, Canada
- Faculty of Medicine and Health Sciences, McGill University, Montreal, QC H4A 3J1, Canada
- Division of Dermatology, McGill University Health Center, Montreal, QC H4A 3J1, Canada
- Correspondence:
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5
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Jiang XY, Yang PS, Xiao O, Yu K, Wang SY, Yang SJ, Zhou SY. Effects of PPAR-γ and RXR-α on mouse meibomian gland epithelial cells during inflammation induced by latanoprost. Exp Eye Res 2022;:109251. [PMID: 36150542 DOI: 10.1016/j.exer.2022.109251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 08/30/2022] [Accepted: 09/13/2022] [Indexed: 11/21/2022]
Abstract
The purpose of this study is to investigate the effects of latanoprost on the secretion of cytokines and chemokines from meibomian gland epithelial cells, and to evaluate the modulation of peroxisome proliferator-activated receptor γ (PPAR-γ) and retinoid X receptor α (RXR-α) during latanoprost-induced inflammation. Mouse meibomian gland epithelial cells were cultured in proliferation and differentiation medium, respectively. Cells were exposed to latanoprost, rosiglitazone (PPAR-γ agonist), or LG100268 (RXR-α agonist), respectively. The expression of IL-6, IL-1β, TNF-α, MMP-9, MCP-1, and CCL-5 were detected by real-time PCR and ELISA. The effect of latanoprost, rosiglitazone, LG100268, and inflammatory cytokines on the differentiation of meibocyte were evaluated by related gene expression and lipid staining. The expression of Keratin-1, 6, 17 protein was detected by western immunoblotting. The results showed that the above cytokines could be induced by latanoprost in meibomian gland epithelial cells. LG100268 and rosiglitazone could inhibit the production of IL-6 and TNF-α induced by latanoprost, respectively. Latanoprost suppressed the expression of differentiation-related mRNA through a positive feedback loop by enhancement of COX-2 expression via FP receptor-activated ERK signaling. The expression of Keratin-17 was upregulated by rosiglitazone and suppressed by LG100268. The application of IL-6 and TNF-α showed negative effects on lipid accumulation in meibomian gland epithelial cells. These results demonstrated that latanoprost could induce inflammation and suppress differentiation of mouse meibomian gland epithelial cells. The activation of PPAR-γ and RXR-α showed an anti-inflammatory effect, showing a potential role to antagonize the effect of latanoprost eyedrops on meibomian gland epithelial cells.
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Xavier JPO, Xavier JCC, da Silva MG, Marques MEA. Impact of VDR and RXR expression in non-melanoma skin cancer pathogenesis. Exp Dermatol 2022; 31:1202-1207. [PMID: 35377505 DOI: 10.1111/exd.14574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 01/18/2022] [Accepted: 03/30/2022] [Indexed: 11/29/2022]
Abstract
1,25(OH)2 D3 , the active form of vitamin D, has been extensively studied for its putative protective activities against tumors. It does biological work by connecting to a nuclear receptor called VDR, which heterodimerizes itself to another nuclear receptor, RXR. The study observed differences in VDR and RXR expression in nonmelanoma skin cancer and actinic keratosis and compared it to normal skin. We performed VDR and RXR immunohistochemistry of 76 controls (normal skin), 49 actinic keratosis, 99 basal cell carcinomas and 96 squamous cell carcinomas from formalin-fixed paraffin-embedded, resulting from surgical procedures. There was a clear pattern in the control group (p<0.001), with the positivity of both receptors, VDR and RXR. Actinic keratosis differed from the basal cell carcinoma and control groups concerning RXR expression (p<0.001). SCC was negative for both receptors, differing in all groups (p<0.001). The site of positivity (nuclear, cytoplasmatic, or both) of VDR differed between all groups (p<0.001). To date, our series is the largest of VDR and RXR immunohistochemistry concerning non-melanoma skin cancer. Our findings reinforce the need to understand the pathways involving VDR and RXR to direct therapies and prevention maneuvers.
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Affiliation(s)
| | - José Cândido Caldeira Xavier
- Department of Pathology, São Paulo State University - UNESP.,Araçatuba Institute of Pathology.,Salesiano "Auxilium" Catholic University Center - Faculty of Medicine - Unisalesiano
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7
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Saika A, Nagatake T, Hirata SI, Sawane K, Adachi J, Abe Y, Isoyama J, Morimoto S, Node E, Tiwari P, Hosomi K, Matsunaga A, Honda T, Tomonaga T, Arita M, Kabashima K, Kunisawa J. ω3 fatty acid metabolite, 12-hydroxyeicosapentaenoic acid, alleviates contact hypersensitivity by downregulation of CXCL1 and CXCL2 gene expression in keratinocytes via retinoid X receptor α. FASEB J 2021; 35:e21354. [PMID: 33749892 DOI: 10.1096/fj.202001687r] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 12/14/2020] [Accepted: 12/23/2020] [Indexed: 11/11/2022]
Abstract
ω3 fatty acids show potent bioactivities via conversion into lipid mediators; therefore, metabolism of dietary lipids is a critical determinant in the properties of ω3 fatty acids in the control of allergic inflammatory diseases. However, metabolic progression of ω3 fatty acids in the skin and their roles in the regulation of skin inflammation remains to be clarified. In this study, we found that 12-hydroxyeicosapentaenoic acid (12-HEPE), which is a 12-lipoxygenase metabolite of eicosapentaenoic acid, was the prominent metabolite accumulated in the skin of mice fed ω3 fatty acid-rich linseed oil. Consistently, the gene expression levels of Alox12 and Alox12b, which encode proteins involved in the generation of 12-HEPE, were much higher in the skin than in the other tissues (eg, gut). We also found that the topical application of 12-HEPE inhibited the inflammation associated with contact hypersensitivity by inhibiting neutrophil infiltration into the skin. In human keratinocytes in vitro, 12-HEPE inhibited the expression of two genes encoding neutrophil chemoattractants, CXCL1 and CXCL2, via retinoid X receptor α. Together, the present results demonstrate that the metabolic progression of dietary ω3 fatty acids differs in different organs, and identify 12-HEPE as the dominant ω3 fatty acid metabolite in the skin.
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Affiliation(s)
- Azusa Saika
- Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research and Laboratory of Gut Environmental System, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Osaka, Japan.,Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan
| | - Takahiro Nagatake
- Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research and Laboratory of Gut Environmental System, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Osaka, Japan
| | - So-Ichiro Hirata
- Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research and Laboratory of Gut Environmental System, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Osaka, Japan
| | - Kento Sawane
- Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research and Laboratory of Gut Environmental System, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Osaka, Japan.,Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan.,Nippon Flour Mills Co., Ltd, Innovation Center, Atsugi, Japan
| | - Jun Adachi
- Laboratory of Proteome Research and Laboratory of Proteomics for Drug Discovery, NIBIOHN, Osaka, Japan
| | - Yuichi Abe
- Laboratory of Proteome Research and Laboratory of Proteomics for Drug Discovery, NIBIOHN, Osaka, Japan.,Division of Molecular Diagnosis, Aichi Cancer Center Research Institute, Nagoya, Japan
| | - Junko Isoyama
- Laboratory of Proteome Research and Laboratory of Proteomics for Drug Discovery, NIBIOHN, Osaka, Japan
| | - Sakiko Morimoto
- Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research and Laboratory of Gut Environmental System, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Osaka, Japan
| | - Eri Node
- Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research and Laboratory of Gut Environmental System, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Osaka, Japan
| | - Prabha Tiwari
- Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research and Laboratory of Gut Environmental System, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Osaka, Japan
| | - Koji Hosomi
- Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research and Laboratory of Gut Environmental System, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Osaka, Japan
| | - Ayu Matsunaga
- Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research and Laboratory of Gut Environmental System, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Osaka, Japan.,Department of Food and Life Science, School of Life and Environmental Science, Azabu University, Sagamihara, Japan
| | - Tetsuya Honda
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Department of Dermatology, Hamamatsu University School of Medicine, Shizuoka, Japan
| | - Takeshi Tomonaga
- Laboratory of Proteome Research and Laboratory of Proteomics for Drug Discovery, NIBIOHN, Osaka, Japan
| | - Makoto Arita
- Division of Physiological Chemistry and Metabolism, Faculty of Pharmacy, Keio University, Tokyo, Japan.,Laboratory for Metabolomics, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan.,Cellular and Molecular Epigenetics Laboratory, Graduate School of Medical Life Science, Yokohama City University, Yokohama, Japan
| | - Kenji Kabashima
- Department of Dermatology, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Jun Kunisawa
- Laboratory of Vaccine Materials, Center for Vaccine and Adjuvant Research and Laboratory of Gut Environmental System, National Institutes of Biomedical Innovation, Health and Nutrition (NIBIOHN), Osaka, Japan.,Graduate School of Pharmaceutical Sciences, Osaka University, Osaka, Japan.,Department of Microbiology and Immunology, Kobe University Graduate School of Medicine, Kobe, Japan.,International Research and Development Center for Mucosal Vaccines, The Institute of Medical Science, The University of Tokyo, Tokyo, Japan.,Graduate School of Medicine, Graduate School of Dentistry, Osaka University, Suita, Japan
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8
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Abstract
The discovery of nuclear receptors, particularly retinoid X receptors (RXR), and their involvement in numerous pathways related to development sparked interest in their immunomodulatory properties. Genetic models using deletion or overexpression of RXR and the subsequent development of several small molecules that are agonists or antagonists of this receptor support a promising therapeutic role for these receptors in immunology. Bexarotene was approved in 1999 for the treatment of cutaneous T cell lymphoma. Several other small molecule RXR agonists have since been synthesized with limited preclinical development, but none have yet achieved FDA approval. Cancer treatment has recently been revolutionized with the introduction of immune checkpoint inhibitors, but their success has been restricted to a minority of patients. This review showcases the emerging immunomodulatory effects of RXR and the potential of small molecules that target this receptor as therapies for cancer and other diseases. Here we describe the essential roles that RXR and partner receptors play in T cells, dendritic cells, macrophages and epithelial cells, especially within the tumor microenvironment. Most of these effects are site and cancer type dependent but skew immune cells toward an anti-inflammatory and anti-tumor effect. This beneficial effect on immune cells supports the promise of combining rexinoids with approved checkpoint blockade therapies in order to enhance efficacy of the latter and to delay or potentially eliminate drug resistance. The data compiled in this review strongly suggest that targeting RXR nuclear receptors is a promising new avenue in immunomodulation for cancer and other chronic inflammatory diseases.
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Affiliation(s)
- Ana S Leal
- Department of Pharmacology & Toxicology, Michigan State University, East Lansing, MI, United States
| | - Lyndsey A Reich
- Department of Pharmacology & Toxicology, Michigan State University, East Lansing, MI, United States
| | - Jessica A Moerland
- Department of Pharmacology & Toxicology, Michigan State University, East Lansing, MI, United States
| | - Di Zhang
- Department of Pharmacology & Toxicology, Michigan State University, East Lansing, MI, United States
| | - Karen T Liby
- Department of Pharmacology & Toxicology, Michigan State University, East Lansing, MI, United States.
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9
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Li J, Lee YK, Fu W, Whalen AM, Estable MC, Raftery LA, White K, Weiner L, Brissette JL. Modeling by disruption and a selected-for partner for the nude locus. EMBO Rep 2020; 22:e49804. [PMID: 33369874 PMCID: PMC7926259 DOI: 10.15252/embr.201949804] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2019] [Revised: 11/03/2020] [Accepted: 11/20/2020] [Indexed: 12/25/2022] Open
Abstract
A long‐standing problem in biology is how to dissect traits for which no tractable model exists. Here, we screen for genes like the nude locus (Foxn1)—genes central to mammalian hair and thymus development—using animals that never evolved hair, thymi, or Foxn1. Fruit flies are morphologically disrupted by the FOXN1 transcription factor and rescued by weak reductions in fly gene function, revealing molecules that potently synergize with FOXN1 to effect dramatic, chaotic change. Strong synergy/effectivity in flies is expected to reflect strong selection/functionality (purpose) in mammals; the more disruptive a molecular interaction is in alien contexts (flies), the more beneficial it will be in its natural, formative contexts (mammals). The approach identifies Aff4 as the first nude‐like locus, as murine AFF4 and FOXN1 cooperatively induce similar cutaneous/thymic phenotypes, similar gene expression programs, and the same step of transcription, pre‐initiation complex formation. These AFF4 functions are unexpected, as AFF4 also serves as a scaffold in common transcriptional‐elongation complexes. Most likely, the approach works because an interaction's power to disrupt is the inevitable consequence of its selected‐for power to benefit.
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Affiliation(s)
- Jian Li
- Department of Cell Biology, State University of New York Downstate Health Sciences University, Brooklyn, NY, USA.,Cutaneous Biology Research Center, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - Yun-Kyoung Lee
- Department of Cell Biology, State University of New York Downstate Health Sciences University, Brooklyn, NY, USA
| | - Wenyu Fu
- Department of Cell Biology, State University of New York Downstate Health Sciences University, Brooklyn, NY, USA.,Cutaneous Biology Research Center, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - Anne M Whalen
- Cutaneous Biology Research Center, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - Mario C Estable
- Department of Chemistry and Biology, Ryerson University, Toronto, ON, Canada
| | - Laurel A Raftery
- Cutaneous Biology Research Center, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - Kristin White
- Cutaneous Biology Research Center, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - Lorin Weiner
- Department of Cell Biology, State University of New York Downstate Health Sciences University, Brooklyn, NY, USA.,Cutaneous Biology Research Center, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
| | - Janice L Brissette
- Department of Cell Biology, State University of New York Downstate Health Sciences University, Brooklyn, NY, USA.,Cutaneous Biology Research Center, Massachusetts General Hospital and Harvard Medical School, Charlestown, MA, USA
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10
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Kim D, Garza LA. Hypothesis: Wound-induced TLR3 activation stimulates endogenous retinoic acid synthesis and signalling during regeneration. Exp Dermatol 2020; 28:450-452. [PMID: 30927295 DOI: 10.1111/exd.13931] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Accepted: 03/13/2019] [Indexed: 12/20/2022]
Abstract
Although the mechanism is unclear, it has been shown that genetically normal adult mice with a large wound form de novo morphogenesis of hair follicles in wound-induced hair neogenesis (WIHN)(1). We focused on how tissues recognize damage signals and identified that double-stranded RNA (dsRNA)-mediated toll-like receptor 3 (TLR3) activation stimulates WIHN. Here, we propose a hypothesis that TLR3 stimulates retinoic acid synthesis and signalling to allow for regeneration, suggesting that common clinical methods of facial rejuvenation in human subjects through damage (such as lasers or dermabrasion), and the use of topical retinoids reflect the same biologic pathway.
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Affiliation(s)
- Dongwon Kim
- Department of Dermatology, Johns Hopkins School of Medicine, Baltimore, Maryland
| | - Luis A Garza
- Department of Dermatology, Johns Hopkins School of Medicine, Baltimore, Maryland
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11
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Flesher JL, Paterson-Coleman EK, Vasudeva P, Ruiz-Vega R, Marshall M, Pearlman E, MacGregor GR, Neumann J, Ganesan AK. Delineating the role of MITF isoforms in pigmentation and tissue homeostasis. Pigment Cell Melanoma Res 2019; 33:279-292. [PMID: 31562697 DOI: 10.1111/pcmr.12828] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 09/16/2019] [Accepted: 09/18/2019] [Indexed: 01/01/2023]
Abstract
MITF, a gene that is mutated in familial melanoma and Waardenburg syndrome, encodes multiple isoforms expressed from alternative promoters that share common coding exons but have unique amino termini. It is not completely understood how these isoforms influence pigmentation in different tissues and how the expression of these independent isoforms of MITF is regulated. Here, we show that melanocytes express two isoforms of MITF, MITF-A and MITF-M. The expression of MITF-A is partially regulated by a newly identified retinoid enhancer element located upstream of the MITF-A promoter. Mitf-A knockout mice have only subtle changes in melanin accumulation in the hair and reduced Tyr expression in the eye. In contrast, Mitf-M-null mice have enlarged kidneys, lack neural crest-derived melanocytes in the skin, choroid, and iris stroma, yet maintain pigmentation within the retinal pigment epithelium and iris pigment epithelium of the eye. Taken together, these studies identify a critical role for MITF-M in melanocytes, a minor role for MITF-A in regulating pigmentation in the hair and Tyr expression in the eye, and a novel role for MITF-M in size control of the kidney.
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Affiliation(s)
- Jessica L Flesher
- Department of Biological Chemistry, University of California, Irvine, CA, USA.,Center for Cancer Systems Biology, University of California, Irvine, CA, USA
| | | | - Priya Vasudeva
- Department of Dermatology, University of California, Irvine, CA, USA
| | - Rolando Ruiz-Vega
- Center for Cancer Systems Biology, University of California, Irvine, CA, USA.,Department of Developmental and Cell Biology, University of California, Irvine, CA, USA.,Center for Complex Biological Systems, University of California, Irvine, CA, USA
| | - Michaela Marshall
- Department of Ophthalmology, University of California, Irvine, CA, USA
| | - Eric Pearlman
- Department of Ophthalmology, University of California, Irvine, CA, USA
| | - Grant R MacGregor
- Department of Developmental and Cell Biology, University of California, Irvine, CA, USA.,Irvine Transgenic Mouse Facility, University Laboratory Animal Resources, Office of Research, Universitiy of California, Irvine, CA, USA
| | - Jonathan Neumann
- Irvine Transgenic Mouse Facility, University Laboratory Animal Resources, Office of Research, Universitiy of California, Irvine, CA, USA
| | - Anand K Ganesan
- Department of Biological Chemistry, University of California, Irvine, CA, USA.,Center for Cancer Systems Biology, University of California, Irvine, CA, USA.,Department of Dermatology, University of California, Irvine, CA, USA
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12
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Wier EM, Garza LA. Through the lens of hair follicle neogenesis, a new focus on mechanisms of skin regeneration after wounding. Semin Cell Dev Biol 2019; 100:122-129. [PMID: 31607627 DOI: 10.1016/j.semcdb.2019.10.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 09/26/2019] [Accepted: 10/01/2019] [Indexed: 12/31/2022]
Abstract
Wound-induced hair follicle neogenesis (WIHN) is a phenomenon that occurs in adult mammalian skin, where fully functional hair follicles are regenerated in the center of large full-thickness excisional wounds. Although originally discovered over 50 years ago in mice and rabbits, within the last decade it has received renewed interest, as the molecular mechanism has begun to be defined. This de novo regeneration of hair follicles largely recapitulates embryonic hair development, requiring canonical Wnt signaling in the epidermis, however, important differences between the two are beginning to come to light. TLR3 mediated double stranded RNA sensing is critical for the regeneration, activating retinoic acid signaling following wounding. Inflammatory cells, including Fgf9-producing γ-δ T cells and macrophages, are also emerging as important mediators of WIHN. Additionally, while dispensable in embryonic hair follicle development, Shh signaling plays a major role in WIHN and may be able to redirect cells fated to scarring wounds into a regenerative phenotype. The cellular basis of WIHN is also becoming clearer, with increasing evidence suggesting an incredible level of cellular plasticity. Multiple stem cell populations, along with lineage switching of differentiated cells all contribute towards the regeneration present in WIHN. Further study of WIHN will uncover key steps in mammalian development and regeneration, potentially leading to new clinical treatments for hair-related disorders or fibrotic scarring.
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Affiliation(s)
- Eric M Wier
- Department of Dermatology, Johns Hopkins University School of Medicine, Baltimore, MD, 21287, United States.
| | - Luis A Garza
- Department of Dermatology, Johns Hopkins University School of Medicine, Baltimore, MD, 21287, United States.
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13
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Rühl R, Krezel W, de Lera AR. 9-Cis-13,14-dihydroretinoic acid, a new endogenous mammalian ligand of retinoid X receptor and the active ligand of a potential new vitamin A category: vitamin A5. Nutr Rev 2019; 76:929-941. [PMID: 30358857 DOI: 10.1093/nutrit/nuy057] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The identity of the endogenous RXR ligand has not been conclusively determined, even though several compounds of natural origin, including retinoids and fatty acids, have been postulated to fulfill this role. Filling this gap, 9-cis-13,14-dihydroretinoic acid (9CDHRA) was identified as an endogenous RXR ligand in mice. This review examines the physiological relevance of various potential endogenous RXR ligands, especially 9CDHRA. The elusive steps in the metabolic synthesis of 9CDHRA, as well as the nutritional/nutrimetabolic origin of 9CDHRA, are also explored, along with the suitability of the ligand to be the representative member of a novel vitamin A class (vitamin A5).
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Affiliation(s)
- Ralph Rühl
- Paprika Bioanalytics BT, Debrecen, Hungary
| | - Wojciech Krezel
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Inserm, Centre National Recherche Scientifique (CNRS), Université de Strasbourg, Illkirch, France.,Fédération de Médecine Translationnelle de Strasbourg, Université de Strasbourg, Strasbourg, France
| | - Angel R de Lera
- Departamento de Química Orgánica, Facultad de Química, Centro De Investigaciones Biomédicasand Instituto de Investigación Biomédica de Vigo, Universidade de Vigo, Campus Lagoas-Marcosende, Vigo, Spain
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14
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Kim D, Chen R, Sheu M, Kim N, Kim S, Islam N, Wier EM, Wang G, Li A, Park A, Son W, Evans B, Yu V, Prizmic VP, Oh E, Wang Z, Yu J, Huang W, Archer NK, Hu Z, Clemetson N, Nelson AM, Chien A, Okoye GA, Miller LS, Ghiaur G, Kang S, Jones JW, Kane MA, Garza LA. Noncoding dsRNA induces retinoic acid synthesis to stimulate hair follicle regeneration via TLR3. Nat Commun 2019; 10:2811. [PMID: 31243280 DOI: 10.1038/s41467-019-10811-y] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Accepted: 06/03/2019] [Indexed: 02/06/2023] Open
Abstract
How developmental programs reactivate in regeneration is a fundamental question in biology. We addressed this question through the study of Wound Induced Hair follicle Neogenesis (WIHN), an adult organogenesis model where stem cells regenerate de novo hair follicles following deep wounding. The exact mechanism is uncertain. Here we show that self-noncoding dsRNA activates the anti-viral receptor toll like receptor 3 (TLR3) to induce intrinsic retinoic acid (RA) synthesis in a pattern that predicts new hair follicle formation after wounding in mice. Additionally, in humans, rejuvenation lasers induce gene expression signatures for dsRNA and RA, with measurable increases in intrinsic RA synthesis. These results demonstrate a potent stimulus for RA synthesis by non-coding dsRNA, relevant to their broad functions in development and immunity. During wound induced hair follicle neogenesis (WIHN), stem cells regenerate hair follicles but how this arises is unclear. Here, the authors show that self-noncoding dsRNA activates the antiviral receptor TLR3 to induce intrinsic retinoic acid, which stimulates WIHN in mice, and in isolated human keratinocyte cells.
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15
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Leyva-Castillo JM, Galand C, Kam C, Burton O, Gurish M, Musser MA, Goldsmith JD, Hait E, Nurko S, Brombacher F, Dong C, Finkelman FD, Lee RT, Ziegler S, Chiu I, Austen KF, Geha RS. Mechanical Skin Injury Promotes Food Anaphylaxis by Driving Intestinal Mast Cell Expansion. Immunity 2019; 50:1262-1275.e4. [PMID: 31027995 DOI: 10.1016/j.immuni.2019.03.023] [Citation(s) in RCA: 134] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 01/17/2019] [Accepted: 03/25/2019] [Indexed: 12/15/2022]
Abstract
Mast cell (MC) mediator release after crosslinking of surface-bound IgE antibody by ingested antigen underlies food allergy. However, IgE antibodies are not uniformly associated with food allergy, and intestinal MC load is an important determinant. Atopic dermatitis (AD), characterized by pruritis and cutaneous sensitization to allergens, including foods, is strongly associated with food allergy. Tape stripping mouse skin, a surrogate for scratching, caused expansion and activation of small intestinal MCs, increased intestinal permeability, and promoted food anaphylaxis in sensitized mice. Tape stripping caused keratinocytes to systemically release interleukin-33 (IL-33), which synergized with intestinal tuft-cell-derived IL-25 to drive the expansion and activation of intestinal type-2 innate lymphoid cells (ILC2s). These provided IL-4, which targeted MCs to expand in the intestine. Duodenal MCs were expanded in AD. In addition to promoting cutaneous sensitization to foods, scratching may promote food anaphylaxis in AD by expanding and activating intestinal MCs.
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Affiliation(s)
| | - Claire Galand
- Division of Immunology, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Christy Kam
- Division of Immunology, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Oliver Burton
- Division of Immunology, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Michael Gurish
- Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Melissa A Musser
- Department of Microbiology and Immunobiology, Harvard Medical School, Boston, MA 02115, USA
| | | | - Elizabeth Hait
- Division of Gastroenterology, Boston Children's Hospital, Boston, MA, USA
| | - Samuel Nurko
- Division of Gastroenterology, Boston Children's Hospital, Boston, MA, USA
| | - Frank Brombacher
- International Center for Genetic Engineering and Biotechnology & University of Cape Town & South Africa Medical Research Council, South Africa
| | - Chen Dong
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing, China
| | - Fred D Finkelman
- Department of Internal Medicine and Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Richard T Lee
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, USA
| | - Steven Ziegler
- Immunology Program, Benaroya Research Institute, Seattle, WA, USA
| | - Isaac Chiu
- Department of Microbiology and Immunobiology, Harvard Medical School, Boston, MA 02115, USA
| | - K Frank Austen
- Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Raif S Geha
- Division of Immunology, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA.
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16
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Park YS, Lee JE, Park JI, Myung CH, Lim YH, Park CK, Hwang JS. Inhibitory mechanism of ginsenoside Rh3 on granulocyte-macrophage colony-stimulating factor expression in UV-B-irradiated murine SP-1 keratinocytes. J Ginseng Res 2018; 44:274-281. [PMID: 32148409 PMCID: PMC7031754 DOI: 10.1016/j.jgr.2018.12.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 11/20/2018] [Accepted: 12/18/2018] [Indexed: 12/16/2022] Open
Abstract
Background Ultraviolet (UV) goes through the epidermis and promotes release of inflammatory cytokines in keratinocytes. Granulocyte–macrophage colony-stimulating factor (GM-CSF), one of the keratinocyte-derived cytokines, regulates proliferation and differentiation of melanocytes. Extracellular signal–regulated kinase (ERK1/2) and protein kinase C (PKC) signaling pathways regulate expression of GM-CSF. Based on these results, we found that ginsenoside Rh3 prevented GM-CSF production and release in UV-B–exposed SP-1 keratinocytes and that this inhibitory effect resulted from the reduction of PKCδ and ERK phosphorylation. Methods We investigated the mechanism by which ginsenoside Rh3 from Panax ginseng inhibited GM-CSF release from UV-B–irradiated keratinocytes. Results Treatment with 12-O-tetradecanoylphorbol-13-acetate (TPA) or UV-B induced release of GM-CSF in the SP-1 keratinocytes. To elucidate whether the change in GM-CSF expression could be related to PKC signaling, the cells were pretreated with H7, an inhibitor of PKC, and irradiated with UV-B. GM-CSF was decreased by H7 in a dose-dependent manner. When we analyzed which ginsenosides repressed GM-CSF expression among 15 ginsenosides, ginsenoside Rh3 showed the largest decline to 40% of GM-CSF expression in enzyme-linked immunosorbent assay. Western blot analysis showed that TPA enhanced the phosphorylation of PKCδ and ERK in the keratinocytes. When we examined the effect of ginsenoside Rh3, we identified that ginsenoside Rh3 inhibited the TPA-induced phosphorylation levels of PKCδ and ERK. Conclusion In summary, we found that ginsenoside Rh3 impeded UV-B–induced GM-CSF production through repression of PKCδ and ERK phosphorylation in SP-1 keratinocytes.
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Affiliation(s)
- Young Sun Park
- Department of Genetic Engineering & Graduate School of Biotechnology, Kyung Hee University, Yongin, Republic of Korea
| | - Ji Eun Lee
- Department of Genetic Engineering & Graduate School of Biotechnology, Kyung Hee University, Yongin, Republic of Korea
| | - Jong Il Park
- Department of Genetic Engineering & Graduate School of Biotechnology, Kyung Hee University, Yongin, Republic of Korea
| | - Cheol Hwan Myung
- Department of Genetic Engineering & Graduate School of Biotechnology, Kyung Hee University, Yongin, Republic of Korea
| | - Young-Ho Lim
- KGC R&D Headquarters, Daejeon, Republic of Korea
| | | | - Jae Sung Hwang
- Department of Genetic Engineering & Graduate School of Biotechnology, Kyung Hee University, Yongin, Republic of Korea
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17
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Elmaadawy E, Elgarhy LH, Shareef M. Cellular retinol-binding protein-1 expression increases with increasing clinical severity of alopecia areata. J Cosmet Dermatol 2018; 18:659-664. [PMID: 30556317 DOI: 10.1111/jocd.12833] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Revised: 08/28/2018] [Accepted: 10/30/2018] [Indexed: 11/29/2022]
Abstract
BACKGROUND Alopecia areata (AA) is multifactorial disease mostly autoimmune affecting anagen hair follicles. Many researchers hypothesize that adequate retinoic acid (RA) levels are important for proper hair follicle behavior. Previous animal studies revealed increase in RA synthesis proteins and decrease in RA degradation proteins in AA patients when compared with controls. OBJECTIVE To evaluate cellular retinol-binding protein-1 expression in lesional skin of alopecia areata in comparison with controls, in an attempt to know its role in the pathogenesis of alopecia areata . METHODS Immunohistochemical expression of cellular retinol-binding protein-1 CRBP1 was evaluated in skin biopsies taken from lesions of alopecia areata in 30 patients and 10 normal biopsy specimens taken from skin of healthy controls (HC) who were within the same age and sex. RESULTS CRBP1 expression was significantly increased in lesional alopecia areata skin in comparison with normal skin of controls (P < 0.001*). Significant positive correlation was found between expression of CRBP-1 and percentage of hair loss in the scalp (SALT score; r = 0.840, P = <0.001). CONCLUSION These results may enhance the idea of the possible role of CRBP1 in the pathogenesis of AA, and ensuring the importance of its level in AA treatment.
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Affiliation(s)
- Eman Elmaadawy
- Department of Dermatology and Venereology, Faculty of medicine, Tanta University, Tanta, Egypt
| | - Lamia H Elgarhy
- Department of Dermatology and Venereology, Faculty of medicine, Tanta University, Tanta, Egypt
| | - Mohammad Shareef
- Department of Pathology, Faculty of medicine, Tanta University, Tanta, Egypt
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18
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Chagani S, Wang R, Carpenter EL, Löhr CV, Ganguli-Indra G, Indra AK. Ablation of epidermal RXRα in cooperation with activated CDK4 and oncogenic NRAS generates spontaneous and acute neonatal UVB induced malignant metastatic melanomas. BMC Cancer 2017; 17:736. [PMID: 29121869 PMCID: PMC5679438 DOI: 10.1186/s12885-017-3714-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Accepted: 10/30/2017] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Understanding the underlying molecular mechanisms involved in the formation of cutaneous malignant melanoma is critical for improved diagnosis and treatment. Keratinocytic nuclear receptor Retinoid X Receptor α (RXRα) has a protective role against melanomagenesis and is involved in the regulation of keratinocyte and melanocyte homeostasis subsequent acute ultraviolet (UV) irradiation. METHODS We generated a trigenic mouse model system (RXRα ep-/- | Tyr-NRAS Q61K | CDK4 R24C/R24C ) harboring an epidermal knockout of Retinoid X Receptor α (RXRα ep-/- ), combined with oncogenic NRAS Q61K (constitutively active RAS) and activated CDK4 R24C/R24C (constitutively active CDK4). Those mice were subjected to a single neonatal dose of UVB treatment and the role of RXR α was evaluated by characterizing the molecular and cellular changes that took place in the untreated and UVB treated trigenic RXRα ep-/- mice compared to the control mice with functional RXRα. RESULTS Here we report that the trigenic mice develops spontaneous melanoma and exposure to a single neonatal UVB treatment reduces the tumor latency in those mice compared to control mice with functional RXRα. Melanomas from the trigenic RXRα ep-/- mice are substantial in size, show increased proliferation, exhibit increased expression of malignant melanoma markers and exhibit enhanced vascularization. Altered expression of several biomarkers including increased expression of activated AKT, p21 and cyclin D1 and reduced expression of pro-apoptotic marker BAX was observed in the tumor adjacent normal (TAN) skin of acute ultraviolet B treated trigenic RXRα ep-/- mice. Interestingly, we observed a significant increase in p21 and Cyclin D1 in the TAN skin of un-irradiated trigenic RXRα ep-/- mice, suggesting that those changes might be consequences of loss of functional RXRα in the melanoma microenvironment. Loss of RXRα in the epidermal keratinocytes in combination with oncogenic NRAS Q61K and CDK4 R24C/R24C mutations in trigenic mice led to significant melanoma invasion into the draining lymph nodes as compared to controls with functional RXRα. CONCLUSIONS Our study demonstrates the protective role of keratinocytic RxRα in (1) suppressing spontaneous and acute UVB-induced melanoma, and (2) preventing progression of the melanoma to malignancy in the presence of driver mutations like activated CDK4 R24C/R24C and oncogenic NRAS Q61K .
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Affiliation(s)
- Sharmeen Chagani
- Molecular and Cellular Biology Program, OSU, Corvallis, 97331, OR, USA
- Department of Pharmaceutical Sciences, College of Pharmacy, OSU, Corvallis, 97331, OR, USA
| | - Rong Wang
- Department of Pharmaceutical Sciences, College of Pharmacy, OSU, Corvallis, 97331, OR, USA
- Linus Pauling Institute, OSU, Corvallis, OR, USA
| | - Evan L Carpenter
- Department of Pharmaceutical Sciences, College of Pharmacy, OSU, Corvallis, 97331, OR, USA
| | - Christiane V Löhr
- College of Veterinary Medicine, Oregon State University, Corvallis, Oregon, 97331, USA
| | - Gitali Ganguli-Indra
- Molecular and Cellular Biology Program, OSU, Corvallis, 97331, OR, USA
- Department of Pharmaceutical Sciences, College of Pharmacy, OSU, Corvallis, 97331, OR, USA
- Knight Cancer Institute, Oregon Health & Science University (OHSU), Portland, 97239, OR, USA
| | - Arup K Indra
- Molecular and Cellular Biology Program, OSU, Corvallis, 97331, OR, USA.
- Department of Pharmaceutical Sciences, College of Pharmacy, OSU, Corvallis, 97331, OR, USA.
- Linus Pauling Institute, OSU, Corvallis, OR, USA.
- Knight Cancer Institute, Oregon Health & Science University (OHSU), Portland, 97239, OR, USA.
- Department of Dermatology, OHSU, Portland, 97239, OR, USA.
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19
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Tamura M, Ishizawa M, Isojima T, Özen S, Oka A, Makishima M, Kitanaka S. Functional analyses of a novel missense and other mutations of the vitamin D receptor in association with alopecia. Sci Rep 2017; 7:5102. [PMID: 28698609 PMCID: PMC5505967 DOI: 10.1038/s41598-017-05081-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 05/23/2017] [Indexed: 01/08/2023] Open
Abstract
Hereditary 1,25-dihydroxyvitamin D-resistant rickets (HVDRR) is a rare disorder, caused by bialellic mutations of the vitamin D receptor (VDR) gene, sometimes associated with alopecia. The aim of this study is to elucidate the mechanism of functional disruption of a novel mutation, detected in a patient with HVDRR, comparing to other mutations with or without alopecia. The patient was a 2-year-old girl with alopecia, who was clinically diagnosed as HVDRR. Genetic analysis revealed a novel homozygous mutation, S360P, located in ligand binding domain (LBD). The mutation was predicted as not disease causing by Polyphen2 and SIFT. But the transcriptional activity of S360P was disrupted as well as other reported mutations, Q152X (located in the hinge lesion), and R274L, H305Q (located in LBD). Following assays revealed no ligand binding affinity, no interaction with cofactors or RXR and no functioning of nuclear localization signals. Our results provide an additional evidence for the previous findings suggesting that DNA binding by the VDR/RXR heterodimer is essential for the function of the VDR in hair development. In conclusion, we identified a novel missense mutation of VDR causing HVDRR with alopecia. Functional analyses revealed that the single amino acid substitution could disrupt the function of the protein.
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Affiliation(s)
- Mayuko Tamura
- Department of Pediatrics, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.,The Japan Society for the Promotion of Science, Tokyo, Japan
| | - Michiyasu Ishizawa
- Division of Biochemistry, Department of Biochemical Sciences, Nihon University School of Medicine, Tokyo, Japan
| | - Tsuyoshi Isojima
- Department of Pediatrics, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Samim Özen
- Department of Pediatric Endocrinology, School of Medicine, Ege University, Izmir, Turkey
| | - Akira Oka
- Department of Pediatrics, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Makoto Makishima
- Division of Biochemistry, Department of Biochemical Sciences, Nihon University School of Medicine, Tokyo, Japan
| | - Sachiko Kitanaka
- Department of Pediatrics, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan.
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20
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Hochfeld LM, Anhalt T, Reinbold CS, Herrera-Rivero M, Fricker N, Nöthen MM, Heilmann-Heimbach S. Expression profiling and bioinformatic analyses suggest new target genes and pathways for human hair follicle related microRNAs. BMC Dermatol 2017; 17:3. [PMID: 28228108 PMCID: PMC5322611 DOI: 10.1186/s12895-017-0054-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Accepted: 02/11/2017] [Indexed: 01/05/2023]
Abstract
BACKGROUND Human hair follicle (HF) cycling is characterised by the tight orchestration and regulation of signalling cascades. Research shows that micro(mi)RNAs are potent regulators of these pathways. However, knowledge of the expression of miRNAs and their target genes and pathways in the human HF is limited. The objective of this study was to improve understanding of the role of miRNAs and their regulatory interactions in the human HF. METHODS Expression levels of ten candidate miRNAs with reported functions in hair biology were assessed in HFs from 25 healthy male donors. MiRNA expression levels were correlated with mRNA-expression levels from the same samples. Identified target genes were tested for enrichment in biological pathways and accumulation in protein-protein interaction (PPI) networks. RESULTS Expression in the human HF was confirmed for seven of the ten candidate miRNAs, and numerous target genes for miR-24, miR-31, and miR-106a were identified. While the latter include several genes with known functions in hair biology (e.g., ITGB1, SOX9), the majority have not been previously implicated (e.g., PHF1). Target genes were enriched in pathways of interest to hair biology, such as integrin and GnRH signalling, and the respective gene products showed accumulation in PPIs. CONCLUSIONS Further investigation of miRNA expression in the human HF, and the identification of novel miRNA target genes and pathways via the systematic integration of miRNA and mRNA expression data, may facilitate the delineation of tissue-specific regulatory interactions, and improve our understanding of both normal hair growth and the pathobiology of hair loss disorders.
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Affiliation(s)
- Lara M Hochfeld
- Institute of Human Genetics, University of Bonn, Sigmund-Freud-Str. 25, 53127, Bonn, Germany.,Department of Genomics, Life and Brain Center, University of Bonn, Sigmund-Freud-Str. 25, 53127, Bonn, Germany
| | - Thomas Anhalt
- Institute of Human Genetics, University of Bonn, Sigmund-Freud-Str. 25, 53127, Bonn, Germany.,Department of Genomics, Life and Brain Center, University of Bonn, Sigmund-Freud-Str. 25, 53127, Bonn, Germany
| | - Céline S Reinbold
- Human Genomics Research Group, Department of Biomedicine, University of Basel, Hebelstrasse 20, 4031, Basel, Switzerland
| | - Marisol Herrera-Rivero
- Institute of Human Genetics, University of Bonn, Sigmund-Freud-Str. 25, 53127, Bonn, Germany.,Department of Genomics, Life and Brain Center, University of Bonn, Sigmund-Freud-Str. 25, 53127, Bonn, Germany
| | - Nadine Fricker
- Institute of Human Genetics, University of Bonn, Sigmund-Freud-Str. 25, 53127, Bonn, Germany.,Department of Genomics, Life and Brain Center, University of Bonn, Sigmund-Freud-Str. 25, 53127, Bonn, Germany
| | - Markus M Nöthen
- Institute of Human Genetics, University of Bonn, Sigmund-Freud-Str. 25, 53127, Bonn, Germany.,Department of Genomics, Life and Brain Center, University of Bonn, Sigmund-Freud-Str. 25, 53127, Bonn, Germany
| | - Stefanie Heilmann-Heimbach
- Institute of Human Genetics, University of Bonn, Sigmund-Freud-Str. 25, 53127, Bonn, Germany. .,Department of Genomics, Life and Brain Center, University of Bonn, Sigmund-Freud-Str. 25, 53127, Bonn, Germany.
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21
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Augenlicht LH. Environmental Impact on Intestinal Stem Cell Functions in Mucosal Homeostasis and Tumorigenesis. J Cell Biochem 2017; 118:943-952. [PMID: 27584938 DOI: 10.1002/jcb.25719] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 08/30/2016] [Indexed: 12/22/2022]
Abstract
Multiple cell compartments at or near the base of the intestinal crypt have been identified as contributing intestinal stem cells for homeostasis of the rapidly turning over intestinal mucosa and cells that can initiate tumor development upon appropriate genetic changes. There is a strong literature establishing the importance of the frequently dividing Lgr5+ crypt base columnar cells as the fundamental cell in providing these stem cell-associated functions, but there are also clear data that more quiescent cells from other compartments can be mobilized to provide these stem cell functions upon compromise of Lgr5+ cells. We review the data that vitamin D, a pleiotropic hormone, is essential for Lgr5 stem cell functions by signaling through the vitamin D receptor. Moreover, we discuss the implications of this role of vitamin D and its impact on relatively long-lived stem cells in regards to the fact that virtually all the data on normal functioning of mouse Lgr5 stem cells is derived from mice exposed to vitamin D levels well above those that characterize the human population. Thus, there are still many questions regarding how dietary and environmental factors influence the complement of cells providing stem cell functions and the mechanisms by which this is determined, and the importance of this in human colorectal tumor development. J. Cell. Biochem. 118: 943-952, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Leonard H Augenlicht
- Departments of Medicine and Cell Biology, Albert Einstein College of Medicine, New York 10461, New York
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Mammadova A, Zhou H, Carels CE, Von den Hoff JW. Retinoic acid signalling in the development of the epidermis, the limbs and the secondary palate. Differentiation 2016; 92:326-335. [DOI: 10.1016/j.diff.2016.05.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 04/20/2016] [Accepted: 05/02/2016] [Indexed: 01/06/2023]
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Jusu S, Presley JF, Kremer R. Phosphorylation of Human Retinoid X Receptor α at Serine 260 Impairs Its Subcellular Localization, Receptor Interaction, Nuclear Mobility, and 1α,25-Dihydroxyvitamin D3-dependent DNA Binding in Ras-transformed Keratinocytes. J Biol Chem 2016; 292:1490-1509. [PMID: 27852823 DOI: 10.1074/jbc.m116.758185] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 10/14/2016] [Indexed: 11/06/2022] Open
Abstract
Human retinoid X receptor α (hRXRα) plays a critical role in DNA binding and transcriptional activity through heterodimeric association with several members of the nuclear receptor superfamily, including the human vitamin D receptor (hVDR). We previously showed that hRXRα phosphorylation at serine 260 through the Ras-Raf-MAPK ERK1/2 activation is responsible for resistance to the growth inhibitory effects of 1α,25-dihydroxyvitamin D3 (1α,25(OH)2D3), the biologically active metabolite of vitamin D3 To further investigate the mechanism of this resistance, we studied intranuclear dynamics of hVDR and hRXRα-tagged constructs in living cells together with endogenous and tagged protein in fixed cells. We find that hVDR-, hRXRα-, and hVDR-hRXRα complex accumulate in the nucleus in 1α,25(OH)2D3-treated HPK1A cells but to a lesser extent in HPK1ARas-treated cells. Also, by using fluorescence resonance energy transfer (FRET), we demonstrate increased interaction of the hVDR-hRXRα complex in 1α,25(OH)2D3-treated HPK1A but not HPK1ARas cells. In HPK1ARas cells, 1α,25(OH)2D3-induced nuclear localization and interaction of hRXRα are restored when cells are treated with the MEK1/2 inhibitor UO126 or following transfection of the non-phosphorylatable hRXRα Ala-260 mutant. Finally, we demonstrate using fluorescence loss in photobleaching and quantitative co-localization with chromatin that RXR immobilization and co-localization with chromatin are significantly increased in 1α,25(OH)2D3-treated HPK1ARas cells transfected with the non-phosphorylatable hRXRα Ala-260 mutant. This suggests that hRXRα phosphorylation significantly disrupts its nuclear localization, interaction with VDR, intra-nuclear trafficking, and binding to chromatin of the hVDR-hRXR complex.
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Affiliation(s)
- Sylvester Jusu
- From the Department of Medicine, Calcium Research Laboratory, Royal Victoria Hospital, McGill University, Montreal, Quebec H4A 3J1.,the Department of Medicine, Experimental Therapeutics and Metabolism Program, McGill University Health Center, Montreal, Quebec H4A 3J1, Canada
| | - John F Presley
- the Department of Anatomy and Cell Biology, McGill University, Montreal, Quebec H3A 0C7, and
| | - Richard Kremer
- From the Department of Medicine, Calcium Research Laboratory, Royal Victoria Hospital, McGill University, Montreal, Quebec H4A 3J1, .,the Department of Medicine, Experimental Therapeutics and Metabolism Program, McGill University Health Center, Montreal, Quebec H4A 3J1, Canada
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Shatirishvili M, Burk AS, Franz CM, Pace G, Kastilan T, Breuhahn K, Hinterseer E, Dierich A, Bakiri L, Wagner EF, Ponta H, Hartmann TN, Tanaka M, Orian-Rousseau V. Epidermal-specific deletion of CD44 reveals a function in keratinocytes in response to mechanical stress. Cell Death Dis 2016; 7:e2461. [PMID: 27831556 PMCID: PMC5260879 DOI: 10.1038/cddis.2016.342] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 09/18/2016] [Accepted: 09/23/2016] [Indexed: 11/09/2022]
Abstract
CD44, a large family of transmembrane glycoproteins, plays decisive roles in physiological and pathological conditions. CD44 isoforms are involved in several signaling pathways essential for life such as growth factor-induced signaling by EGF, HGF or VEGF. CD44 is also the main hyaluronan (HA) receptor and as such is involved in HA-dependent processes. To allow a genetic dissection of CD44 functions in homeostasis and disease, we generated a Cd44 floxed allele allowing tissue- and time-specific inactivation of all CD44 isoforms in vivo. As a proof of principle, we inactivated Cd44 in the skin epidermis using the K14Cre allele. Although the skin of such Cd44Δker mutants appeared morphologically normal, epidermal stiffness was reduced, wound healing delayed and TPA induced epidermal thickening decreased. These phenotypes might be caused by cell autonomous defects in differentiation and HA production as well as impaired adhesion and migration on HA by Cd44Δker keratinocytes. These findings support the usefulness of the conditional Cd44 allele in unraveling essential physiological and pathological functions of CD44 isoforms.
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Affiliation(s)
- M Shatirishvili
- Karlsruhe Institute of Technology, Institute of Toxicology and Genetics, Karlsruhe, Germany
| | - A S Burk
- University of Heidelberg, Institute of Physical Chemistry, Heidelberg, Germany
| | - C M Franz
- Karlsruhe Institute of Technology, DFG-Center for Functional Nanostructures, Karlsruhe, Germany
| | - G Pace
- Karlsruhe Institute of Technology, Institute of Toxicology and Genetics, Karlsruhe, Germany
| | - T Kastilan
- Karlsruhe Institute of Technology, Institute of Toxicology and Genetics, Karlsruhe, Germany
| | - K Breuhahn
- Heidelberg University Hospital, Institute of Pathology, Heidelberg, Germany
| | - E Hinterseer
- Laboratory for Immunological and Molecular Cancer Research, Third Medical Department with Hematology, Medical Oncology, Hemostaseology, Infectious Diseases, and Rheumatology, Oncologic Center, Paracelsus Medical University, Salzburg, Austria
| | - A Dierich
- Institut Clinique de la Souris Illkirch, Illkirch, France
| | - L Bakiri
- Spanish National Cancer Centre, Genes Development and Disease Group, Cancer Cell Biology Programme, Madrid, Spain
| | - E F Wagner
- Spanish National Cancer Centre, Genes Development and Disease Group, Cancer Cell Biology Programme, Madrid, Spain
| | - H Ponta
- Karlsruhe Institute of Technology, Institute of Toxicology and Genetics, Karlsruhe, Germany
| | - T N Hartmann
- Laboratory for Immunological and Molecular Cancer Research, Third Medical Department with Hematology, Medical Oncology, Hemostaseology, Infectious Diseases, and Rheumatology, Oncologic Center, Paracelsus Medical University, Salzburg, Austria
| | - M Tanaka
- University of Heidelberg, Institute of Physical Chemistry, Heidelberg, Germany.,Institute for Integrated Cell-Material Sciences (WPI iCeMS), Kyoto University, Kyoto 606-8501, Japan
| | - V Orian-Rousseau
- Karlsruhe Institute of Technology, Institute of Toxicology and Genetics, Karlsruhe, Germany
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Mihály J, Gericke J, Lucas R, de Lera AR, Alvarez S, Törőcsik D, Rühl R. TSLP expression in the skin is mediated via RARγ-RXR pathways. Immunobiology 2016; 221:161-5. [PMID: 26531761 DOI: 10.1016/j.imbio.2015.09.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 09/08/2015] [Accepted: 09/08/2015] [Indexed: 11/19/2022]
Abstract
TSLP is an important trigger and initiator for various atopic diseases mainly atopic dermatitis (AD). Activators of nuclear hormone receptors like bioactive vitamin A and D derivatives are known to induce TSLP up-regulation in the skin. In this study, various combinations of synthetic specific agonists and antagonists of the retinoic acid receptors (RARs), retinoid X receptors (RXRs) and vitamin D receptor (VDR) were topically administered to mice. The aim of the study was to elucidate via which nuclear hormone receptor pathways TSLP is regulated and how this regulation is connected to the development and phenotype of atopic dermatitis. TSLP expression was monitored using QRT-PCR and serum TSLP levels using ELISA. Synthetic agonists of the VDR and RARγ as well as the natural agonist all-trans retinoic acid (ATRA) increased TSLP expression in the skin, while an RXR agonist was not active. Treatments with antagonists of RXRs and RARs in addition to RARα-agonists reduced skin TSLP expression. Strong activation was found after a combination of a VDR and an RXR agonist (ca. 5 times induction) and even stronger by an RARγ and an RXR agonist treatment (ca. 48 times induction). We conclude that besides VDR-mediated signaling mainly RARγ-RXR mediated pathways in the skin are important patho-physiological triggers for increased skin TSLP expression. We conclude that topical synthesized retinoids stimulated by internal or external triggers or topically applied induce TSLP production and are thereby important triggers for atopic dermatitis prevalence.
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MESH Headings
- Adolescent
- Adult
- Animals
- Calcitriol/analogs & derivatives
- Calcitriol/pharmacology
- Coumaric Acids/pharmacology
- Cytokines/blood
- Cytokines/genetics
- Cytokines/immunology
- Dermatitis, Atopic/chemically induced
- Dermatitis, Atopic/genetics
- Dermatitis, Atopic/immunology
- Dermatitis, Atopic/pathology
- Female
- Gene Expression Regulation
- Humans
- Immunization
- Male
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Organic Chemicals/pharmacology
- Ovalbumin/administration & dosage
- Receptors, Calcitriol/agonists
- Receptors, Calcitriol/antagonists & inhibitors
- Receptors, Calcitriol/genetics
- Receptors, Calcitriol/immunology
- Receptors, Retinoic Acid/agonists
- Receptors, Retinoic Acid/antagonists & inhibitors
- Receptors, Retinoic Acid/genetics
- Receptors, Retinoic Acid/immunology
- Retinoid X Receptors/agonists
- Retinoid X Receptors/antagonists & inhibitors
- Retinoid X Receptors/genetics
- Retinoid X Receptors/immunology
- Signal Transduction/immunology
- Skin/drug effects
- Skin/immunology
- Skin/pathology
- Tetrahydronaphthalenes/pharmacology
- Tretinoin/pharmacology
- Thymic Stromal Lymphopoietin
- Retinoic Acid Receptor gamma
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Affiliation(s)
- Johanna Mihály
- Department of Biochemistry and Molecular Biology, University of Debrecen, Hungary
| | - Janine Gericke
- Department of Biochemistry and Molecular Biology, University of Debrecen, Hungary
| | - Renata Lucas
- Department of Biochemistry and Molecular Biology, University of Debrecen, Hungary
| | - Angel R de Lera
- Departamento de Química Orgánica, Facultade de Química, Universidade Vigo, Vigo, Spain
| | - Susana Alvarez
- Departamento de Química Orgánica, Facultade de Química, Universidade Vigo, Vigo, Spain
| | | | - Ralph Rühl
- Department of Biochemistry and Molecular Biology, University of Debrecen, Hungary; Paprika Bioanalytics BT, Debrecen, Hungary; MTA-DE Public Health Research Group of the Hungarian Academy of Sciences, Faculty of Public Health, University of Debrecen, Hungary.
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26
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Doddapaneni BS, Kyryachenko S, Chagani SE, Alany RG, Rao DA, Indra AK, Alani AW. A three-drug nanoscale drug delivery system designed for preferential lymphatic uptake for the treatment of metastatic melanoma. J Control Release 2015; 220:503-514. [DOI: 10.1016/j.jconrel.2015.11.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 10/18/2015] [Accepted: 11/02/2015] [Indexed: 01/05/2023]
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27
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Coleman DJ, Chagani S, Hyter S, Sherman AM, Löhr CV, Liang X, Ganguli-Indra G, Indra AK. Loss of keratinocytic RXRα combined with activated CDK4 or oncogenic NRAS generates UVB-induced melanomas via loss of p53 and PTEN in the tumor microenvironment. Mol Cancer Res 2014; 13:186-96. [PMID: 25189354 DOI: 10.1158/1541-7786.mcr-14-0164] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
UNLABELLED Understanding the molecular mechanisms behind formation of melanoma, the deadliest form of skin cancer, is crucial for improved diagnosis and treatment. One key is to better understand the cross-talk between epidermal keratinocytes and pigment-producing melanocytes. Here, using a bigenic mouse model system combining mutant oncogenic NRAS(Q61K) (constitutively active RAS) or mutant activated CDK4(R24C/R24C) (prevents binding of CDK4 by kinase inhibitor p16(INK4A)) with an epidermis-specific knockout of the nuclear retinoid X receptor alpha (RXRα(ep-/-)) results in increased melanoma formation after chronic ultraviolet-B (UVB) irradiation compared with control mice with functional RXRα. Melanomas from both groups of bigenic RXRα(ep-/-) mice are larger in size with higher proliferative capacity, and exhibit enhanced angiogenic properties and increased expression of malignant melanoma markers. Analysis of tumor adjacent normal skin from these mice revealed altered expression of several biomarkers indicative of enhanced melanoma susceptibility, including reduced expression of tumor suppressor p53 and loss of PTEN, with concomitant increase in activated AKT. Loss of epidermal RXRα in combination with UVB significantly enhances invasion of melanocytic cells to draining lymph nodes in bigenic mice expressing oncogenic NRAS(Q61K) compared with controls with functional RXRα. These results suggest a crucial role of keratinocytic RXRα to suppress formation of UVB-induced melanomas and their progression to malignant cancers in the context of driver mutations such as activated CDK4(R24C/R24C) or oncogenic NRAS(Q61K). IMPLICATIONS These findings suggest that RXRα may serve as a clinical diagnostic marker and therapeutic target in melanoma progression and metastasis.
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Affiliation(s)
- Daniel J Coleman
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon. Molecular and Cellular Biology Program, Oregon State University, Corvallis, Oregon
| | - Sharmeen Chagani
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon. Molecular and Cellular Biology Program, Oregon State University, Corvallis, Oregon
| | - Stephen Hyter
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon. Molecular and Cellular Biology Program, Oregon State University, Corvallis, Oregon
| | - Anna M Sherman
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon. BioResource Research Program, College of Agricultural Sciences, Oregon State University, Corvallis, Oregon
| | - Christiane V Löhr
- College of Veterinary Medicine, Oregon State University, Corvallis, Oregon
| | - Xiaobo Liang
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon
| | - Gitali Ganguli-Indra
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon. Molecular and Cellular Biology Program, Oregon State University, Corvallis, Oregon
| | - Arup K Indra
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon. Molecular and Cellular Biology Program, Oregon State University, Corvallis, Oregon. Environmental Health Science Center, Oregon State University, Corvallis, Oregon. Department of Dermatology, Oregon Health and Science University, Portland, Oregon.
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28
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Noguchi F, Nakajima T, Inui S, Reddy JK, Itami S. Alteration of skin wound healing in keratinocyte-specific mediator complex subunit 1 null mice. PLoS One 2014; 9:e102271. [PMID: 25122137 DOI: 10.1371/journal.pone.0102271] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Accepted: 06/17/2014] [Indexed: 02/07/2023] Open
Abstract
MED1 (Mediator complex subunit 1) is a co-activator of various transcription factors that function in multiple transcriptional pathways. We have already established keratinocyte-specific MED1 null mice (Med1epi−/−) that develop epidermal hyperplasia. Herein, to investigate the function(s) of MED1 in skin wound healing, full-thickness skin wounds were generated in Med1epi−/− and age-matched wild-type mice and the healing process was analyzed. Macroscopic wound closure and the re-epithelialization rate were accelerated in 8-week-old Med1epi−/− mice compared with age-matched wild-type mice. Increased lengths of migrating epithelial tongues and numbers of Ki67-positive cells at the wounded epidermis were observed in 8-week-old Med1epi−/− mice, whereas wound contraction and the area of α-SMA-positive myofibroblasts in the granulation tissue were unaffected. Migration was enhanced in Med1epi−/− keratinocytes compared with wild-type keratinocytes in vitro. Immunoblotting revealed that the expression of follistatin was significantly decreased in Med1epi−/− keratinocytes. Moreover, the mitogen-activated protein kinase pathway was enhanced before and after treatment of Med1epi−/− keratinocytes with activin A in vitro. Cell-cycle analysis showed an increased ratio of S phase cells after activin A treatment of Med1epi−/− keratinocytes compared with wild-type keratinocytes. These findings indicate that the activin-follistatin system is involved in this acceleration of skin wound healing in 8-week-old Med1epi−/− mice. On the other hand, skin wound healing in 6-month-old Med1epi−/− mice was significantly delayed with decreased numbers of Ki67-positive cells at the wounded epidermis as well as BrdU-positive label retaining cells in hair follicles compared with age-matched wild-type mice. These results agree with our previous observation that hair follicle bulge stem cells are reduced in older Med1epi−/− mice, indicating a decreased contribution of hair follicle stem cells to epidermal regeneration after wounding in 6-month-old Med1epi−/− mice. This study sheds light on the novel function of MED1 in keratinocytes and suggests a possible new therapeutic approach for skin wound healing and aging.
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29
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Akimoto Y, Miyaji M, Morimoto-kamata R, Kosaka Y, Obinata A. Retinoic Acid-Induced Epidermal Transdifferentiation in Skin. J Dev Biol 2014; 2:158-173. [DOI: 10.3390/jdb2030158] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
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30
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Feldman D, J Malloy P. Mutations in the vitamin D receptor and hereditary vitamin D-resistant rickets. Bonekey Rep 2014; 3:510. [PMID: 24818002 DOI: 10.1038/bonekey.2014.5] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Accepted: 09/27/2013] [Indexed: 12/24/2022]
Abstract
Heterogeneous loss of function mutations in the vitamin D receptor (VDR) interfere with vitamin D signaling and cause hereditary vitamin D-resistant rickets (HVDRR). HVDRR is characterized by hypocalcemia, secondary hyperparathyroidism and severe early-onset rickets in infancy and is often associated with consanguinity. Affected children may also exhibit alopecia of the scalp and total body. The children usually fail to respond to treatment with calcitriol; in fact, their endogenous levels are often very elevated. Successful treatment requires reversal of hypocalcemia and secondary hyperparathyroidism and is usually accomplished by administration of high doses of calcium given either intravenously or sometimes orally to bypass the intestinal defect in VDR signaling.
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31
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Miazgowicz MM, Headley MB, Larson RP, Ziegler SF. Thymic stromal lymphopoietin and the pathophysiology of atopic disease. Expert Rev Clin Immunol 2014; 5:547-556. [PMID: 20436950 DOI: 10.1586/eci.09.45] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Thymic stromal lymphopoietin (TSLP) is an IL-7-related cytokine expressed predominantly by barrier epithelial cells. TSLP is a potent activator of several cell types, including myeloid-derived dendritic cells, monocytes/macrophages and mast cells. Recent studies have revealed an important role for TSLP in the initiation and progression of allergic inflammatory diseases. In this review, we will discuss the role of TSLP in atopic diseases, as well as its function in immune homeostasis.
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Affiliation(s)
- Michael M Miazgowicz
- Immunology Program, Benaroya Research Institute, Seattle, WA, USA and Immunology Department, University of Washington School of Medicine, Seattle, WA, USA and Benaroya Research Institute at Virginia Mason, 1201 Ninth Avenue, Seattle, WA 98101, USA, Tel.: +1 206 583 6525, ,
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Paterson EK, Ho H, Kapadia R, Ganesan AK. 9-cis retinoic acid is the ALDH1A1 product that stimulates melanogenesis. Exp Dermatol 2013; 22:202-9. [PMID: 23489423 DOI: 10.1111/exd.12099] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/21/2013] [Indexed: 12/29/2022]
Abstract
Aldehyde dehydrogenase 1A1 (ALDH1A1), an enzyme that catalyses the conversion of lipid aldehydes to lipid carboxylic acids, plays pleiotropic roles in UV-radiation resistance, melanogenesis and stem cell maintenance. In this study, a combination of RNAi and pharmacologic approaches were used to determine which ALDH1A1 substrates and products regulate melanogenesis. Initial studies revealed that neither the UV-induced lipid aldehyde 4-hydroxy-2-nonenal nor the ALDH1A1 product all-trans retinoic acid appreciably induced melanogenesis. In contrast, both the ALDH1A1 substrate 9-cis retinal and its corresponding product 9-cis retinoic acid potently induced the accumulation of MITF mRNA, Tyrosinase mRNA and melanin. ALDH1A1 depletion inhibited the ability of 9-cis retinal but not 9-cis retinoic acid to stimulate melanogenesis, indicating that ALDH1A1 regulates melanogenesis by catalysing the conversion of 9-cis retinal to 9-cis retinoic acid. The addition of potent ALDH1A inhibitors (cyanamide or Angeli's salt) suppressed Tyrosinase and MITF mRNA accumulation in vitro and also melanin accumulation in skin equivalents, suggesting that 9-cis retinoids regulate melanogenesis in the intact epidermis. Taken together, these studies not only identify cyanamide as a potential novel treatment for hyperpigmentary disorders, but also identify 9-cis retinoic acid as a pigment stimulatory agent that may have clinical utility in the treatment of hypopigmentary disorders, such as vitiligo.
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Affiliation(s)
- Elyse K Paterson
- Department of Biological Chemistry, University of California, Irvine, CA 92697-2400, USA
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Gericke J, Ittensohn J, Mihály J, Álvarez S, Álvarez R, Töröcsik D, de Lera ÁR, Rühl R. Regulation of retinoid-mediated signaling involved in skin homeostasis by RAR and RXR agonists/antagonists in mouse skin. PLoS One 2013; 8:e62643. [PMID: 23638129 PMCID: PMC3634743 DOI: 10.1371/journal.pone.0062643] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2012] [Accepted: 03/22/2013] [Indexed: 12/23/2022] Open
Abstract
Endogenous retinoids like all-trans retinoic acid (ATRA) play important roles in skin homeostasis and skin-based immune responses. Moreover, retinoid signaling was found to be dysregulated in various skin diseases. The present study used topical application of selective agonists and antagonists for retinoic acid receptors (RARs) α and γ and retinoid-X receptors (RXRs) for two weeks on mouse skin in order to determine the role of retinoid receptor subtypes in the gene regulation in skin. We observed pronounced epidermal hyperproliferation upon application of ATRA and synthetic agonists for RARγ and RXR. ATRA and the RARγ agonist further increased retinoid target gene expression (Rbp1, Crabp2, Krt4, Cyp26a1, Cyp26b1) and the chemokines Ccl17 and Ccl22. In contrast, a RARα agonist strongly decreased the expression of ATRA-synthesis enzymes, of retinoid target genes, markers of skin homeostasis, and various cytokines in the skin, thereby markedly resembling the expression profile induced by RXR and RAR antagonists. Our results indicate that RARα and RARγ subtypes possess different roles in the skin and may be of relevance for the auto-regulation of endogenous retinoid signaling in skin. We suggest that dysregulated retinoid signaling in the skin mediated by RXR, RARα and/or RARγ may promote skin-based inflammation and dysregulation of skin barrier properties.
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Affiliation(s)
- Janine Gericke
- Department of Biochemistry and Molecular Biology, University of Debrecen, Debrecen, Hungary
| | - Jan Ittensohn
- Department of Biochemistry and Molecular Biology, University of Debrecen, Debrecen, Hungary
| | - Johanna Mihály
- Department of Biochemistry and Molecular Biology, University of Debrecen, Debrecen, Hungary
- Paprika Bioanalytics BT, Debrecen, Hungary
| | - Susana Álvarez
- Departamento de Química Orgánica, Universidade de Vigo, Vigo, Spain
| | - Rosana Álvarez
- Departamento de Química Orgánica, Universidade de Vigo, Vigo, Spain
| | - Dániel Töröcsik
- Department of Dermatology, University of Debrecen, Debrecen, Hungary
| | - Ángel R. de Lera
- Departamento de Química Orgánica, Universidade de Vigo, Vigo, Spain
| | - Ralph Rühl
- Department of Biochemistry and Molecular Biology, University of Debrecen, Debrecen, Hungary
- Paprika Bioanalytics BT, Debrecen, Hungary
- Apoptosis and Genomics Research Group of the Hungarian Academy of Science, Debrecen, Hungary
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34
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Hyter S, Indra AK. Nuclear hormone receptor functions in keratinocyte and melanocyte homeostasis, epidermal carcinogenesis and melanomagenesis. FEBS Lett 2013; 587:529-41. [PMID: 23395795 PMCID: PMC3670764 DOI: 10.1016/j.febslet.2013.01.041] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2012] [Revised: 12/12/2012] [Accepted: 01/18/2013] [Indexed: 12/19/2022]
Abstract
Skin homeostasis is maintained, in part, through regulation of gene expression orchestrated by type II nuclear hormone receptors in a cell and context specific manner. This group of transcriptional regulators is implicated in various cellular processes including epidermal proliferation, differentiation, permeability barrier formation, follicular cycling and inflammatory responses. Endogenous ligands for the receptors regulate actions during skin development and maintenance of tissue homeostasis. Type II nuclear receptor signaling is also important for cellular crosstalk between multiple cell types in the skin. Overall, these nuclear receptors are critical players in keratinocyte and melanocyte biology and present targets for cutaneous disease management.
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Affiliation(s)
- Stephen Hyter
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon, USA
- Molecular and Cellular Biology Program, Oregon State University, Corvallis, Oregon, USA
| | - Arup K Indra
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Corvallis, Oregon, USA
- Molecular and Cellular Biology Program, Oregon State University, Corvallis, Oregon, USA
- Environmental Health Science Center, Oregon State University, Corvallis, Oregon, USA
- Department of Dermatology, Oregon Health and Science University, Portland, Oregon, USA
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Abstract
Identification of vitamin D as a potent antirachitic factor almost a century ago prompted investigations aimed at addressing its mechanism of action and key target tissues. Studies in vitamin D deficiency models and in kindreds with impaired hormone activation and function were critical in identifying key steps in the vitamin D signaling pathway. Studies in humans with vitamin D receptor (VDR) mutations provided a tremendous amount of information regarding the role of this receptor in calcium and skeletal homeostasis. The availability of mouse models of VDR ablation provided an important tool for detailed molecular analyses of the pathophysiologic basis for the skeletal, parathyroid and cutaneous phenotypes observed in mice and humans with impaired VDR function. These investigations revealed that a critical action of the liganded receptor is the promotion of intestinal calcium absorption. Bypassing this defect by dietary or transgenic rescue prevents the severe skeletal phenotype of the VDR ablated mice, as well as the development of hyperparathyroidism. In contrast, intestine specific ablation of the receptor results in marked skeletal pathology. Like their human counterparts, VDR knockout mice develop alopecia. Studies in these mice demonstrated that the actions of the VDR required for cyclical regeneration of the hair follicle and prevention of alopecia were shown independent of 1,25-dihydroxyvitamin D demonstrating that the unliganded receptor has an important role in the cutaneous homeostasis.
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Affiliation(s)
- Marie B Demay
- Endocrine Unit, Massachusetts General Hospital, Harvard Medical School, Thier 11, 50 Blossom St., Boston, MA, USA.
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36
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Hyter S, Coleman DJ, Ganguli-Indra G, Merrill GF, Ma S, Yanagisawa M, Indra AK. Endothelin-1 is a transcriptional target of p53 in epidermal keratinocytes and regulates ultraviolet-induced melanocyte homeostasis. Pigment Cell Melanoma Res 2013; 26:247-58. [PMID: 23279852 DOI: 10.1111/pcmr.12063] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2012] [Accepted: 12/27/2012] [Indexed: 12/12/2022]
Abstract
Keratinocytes contribute to melanocyte activity by influencing their microenvironment, in part, through secretion of paracrine factors. Here, we discovered that p53 directly regulates Edn1 expression in epidermal keratinocytes and controls UV-induced melanocyte homeostasis. Selective ablation of endothelin-1 (EDN1) in murine epidermis (EDN1(ep-/-) ) does not alter melanocyte homeostasis in newborn skin but decreases dermal melanocytes in adult skin. Results showed that keratinocytic EDN1 in a non-cell autonomous manner controls melanocyte proliferation, migration, DNA damage, and apoptosis after ultraviolet B (UVB) irradiation. Expression of other keratinocyte-derived paracrine factors did not compensate for the loss of EDN1. Topical treatment with EDN1 receptor (EDNRB) antagonist BQ788 abrogated UV-induced melanocyte activation and recapitulated the phenotype seen in EDN1(ep-/-) mice. Altogether, the present studies establish an essential role of EDN1 in epidermal keratinocytes to mediate UV-induced melanocyte homeostasis in vivo.
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Affiliation(s)
- Stephen Hyter
- Department of Pharmaceutical Sciences, Oregon State University, Corvallis, OR, USA
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Nakajima T, Inui S, Fushimi T, Noguchi F, Kitagawa Y, Reddy JK, Itami S. Roles of MED1 in quiescence of hair follicle stem cells and maintenance of normal hair cycling. J Invest Dermatol 2013; 133:354-60. [PMID: 22931914 DOI: 10.1038/jid.2012.293] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
MED1 (mediator complex subunit 1) is expressed by human epidermal keratinocytes and functions as a coactivator of several transcription factors. To elucidate the role of MED1 in keratinocytes, we established keratinocyte-specific Med1-null (Med1(epi-/-)) mice using the K5Cre/LoxP system. Development of the epidermis and appendages of Med1(epi-/-) mice were macroscopically and microscopically normal until the second catagen of the hair cycle. However, the hair cycle of Med1(epi-/-) mice was spontaneously repeated after the second telogen, which does not occur in wild-type (WT) mice. Hair follicles of Med1(epi-/-) mice could not enter anagen after 6 months of age, resulting in sparse pelage hair in older Med1(epi-/-) mice. Interfollicular epidermis (IFE) of Med1(epi-/-) mice was acanthotic and more proliferative than that of WT mice, whereas these findings were less evident in older Med1(epi-/-) mice. Flow cytometric analysis revealed that the numbers of hair follicle bulge stem cells were reduced in Med1(epi-/-) mice from a few months after birth. These results suggest that MED1 has roles in maintaining quiescence of keratinocytes and preventing depletion of the follicular stem cells.
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38
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Demay MB. The hair cycle and Vitamin D receptor. Arch Biochem Biophys 2012; 523:19-21. [DOI: 10.1016/j.abb.2011.10.002] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2011] [Revised: 09/30/2011] [Accepted: 10/03/2011] [Indexed: 10/16/2022]
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Han R, Beppu H, Lee YK, Georgopoulos K, Larue L, Li E, Weiner L, Brissette JL. A pair of transmembrane receptors essential for the retention and pigmentation of hair. Genesis 2012; 50:783-800. [PMID: 22611050 DOI: 10.1002/dvg.22039] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2011] [Revised: 05/03/2011] [Accepted: 05/12/2011] [Indexed: 01/07/2023]
Abstract
Hair follicles are simple, accessible models for many developmental processes. Here, using mutant mice, we show that Bmpr2, a known receptor for bone morphogenetic proteins (Bmps), and Acvr2a, a known receptor for Bmps and activins, are individually redundant but together essential for multiple follicular traits. When Bmpr2/Acvr2a function is reduced in cutaneous epithelium, hair follicles undergo rapid cycles of hair generation and loss. Alopecia results from a failure to terminate hair development properly, as hair clubs never form, and follicular retraction is slowed. Hair regeneration is rapid due to premature activation of new hair-production programs. Hair shafts differentiate aberrantly due to impaired arrest of medullary-cell proliferation. When Bmpr2/Acvr2a function is reduced in melanocytes, gray hair develops, as melanosomes differentiate but fail to grow, resulting in organelle miniaturization. We conclude that Bmpr2 and Acvr2a normally play cell-type-specific, necessary roles in organelle biogenesis and the shutdown of developmental programs and cell division.
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Affiliation(s)
- Rong Han
- Department of Cell Biology, State University of New York Downstate Medical Center, Brooklyn, NY 11203, USA
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40
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Thomas M, Sukhai MA, Kamel-Reid S. An emerging role for retinoid X receptor α in malignant hematopoiesis. Leuk Res 2012; 36:1075-81. [PMID: 22710246 DOI: 10.1016/j.leukres.2012.05.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2011] [Revised: 04/13/2012] [Accepted: 05/21/2012] [Indexed: 12/29/2022]
Abstract
The retinoid X receptor alpha is the obligatory heterodimerization partner for a range of nuclear hormone receptors, and is required for signaling through the pathways mediated by those receptors. While RXR alpha has critical roles in embryonic development, it appears to be dispensable in adult hematopoiesis. Strikingly, recent evidence has indicated that proper functioning of RXR alpha is necessary for the pathogenesis of acute promyelocytic leukemia (APL), suggesting a novel avenue that can be exploited in the management and treatment of this disease. In this review we highlight recent studies that clarify the role of RXR alpha in normal and malignant hematopoiesis.
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Affiliation(s)
- Mariam Thomas
- Princess Margaret Hospital/the Ontario Cancer Institute, University Health Network, Toronto, ON, Canada
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41
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Rosen CJ, Adams JS, Bikle DD, Black DM, Demay MB, Manson JE, Murad MH, Kovacs CS. The nonskeletal effects of vitamin D: an Endocrine Society scientific statement. Endocr Rev 2012; 33:456-92. [PMID: 22596255 PMCID: PMC3365859 DOI: 10.1210/er.2012-1000] [Citation(s) in RCA: 479] [Impact Index Per Article: 39.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Accepted: 04/18/2012] [Indexed: 12/18/2022]
Abstract
Significant controversy has emerged over the last decade concerning the effects of vitamin D on skeletal and nonskeletal tissues. The demonstration that the vitamin D receptor is expressed in virtually all cells of the body and the growing body of observational data supporting a relationship of serum 25-hydroxyvitamin D to chronic metabolic, cardiovascular, and neoplastic diseases have led to widespread utilization of vitamin D supplementation for the prevention and treatment of numerous disorders. In this paper, we review both the basic and clinical aspects of vitamin D in relation to nonskeletal organ systems. We begin by focusing on the molecular aspects of vitamin D, primarily by examining the structure and function of the vitamin D receptor. This is followed by a systematic review according to tissue type of the inherent biological plausibility, the strength of the observational data, and the levels of evidence that support or refute an association between vitamin D levels or supplementation and maternal/child health as well as various disease states. Although observational studies support a strong case for an association between vitamin D and musculoskeletal, cardiovascular, neoplastic, and metabolic disorders, there remains a paucity of large-scale and long-term randomized clinical trials. Thus, at this time, more studies are needed to definitively conclude that vitamin D can offer preventive and therapeutic benefits across a wide range of physiological states and chronic nonskeletal disorders.
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42
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Bollag WB. Mediator1: an important intermediary of vitamin D receptor-regulated epidermal function and hair follicle biology. J Invest Dermatol 2012; 132:1068-70. [PMID: 22418940 DOI: 10.1038/jid.2012.25] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Considerable data in the literature support the idea that 1,25-dihydroxyvitamin D3 and the vitamin D receptor (VDR) are involved in regulating skin biology. Studies using cultured keratinocytes, artificial human skin, and transgenic mouse models, as well as observations in patients with rickets, provide evidence of this pathway's importance in epidermal proliferation and differentiation and the hair growth cycle. The report by Oda et al. in this issue also indicates an important role of the VDR coactivator mediator 1 in these processes.
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43
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Schneider MR. Genetic mouse models for skin research: strategies and resources. Genesis 2012; 50:652-64. [PMID: 22467532 DOI: 10.1002/dvg.22029] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2011] [Revised: 03/20/2012] [Accepted: 03/24/2012] [Indexed: 12/16/2022]
Abstract
A number of features contributed to establishing the mouse as the favorite model organism for skin research: the genetic and pathophysiological similarities to humans, the small size and relatively short reproductive period, meaning low maintenance costs, and the availability of sophisticated tools for manipulating the genome, gametes, and embryos. While initial studies depended on strains displaying skin abnormalities due to spontaneous genetic mutations, the availability of the transgenic and knockout technologies and their astonishing perfection during the last decades allowed the development of mouse lines permitting any imaginable genetic modification including gene inactivation, substitution, modification, or overexpression. While these technologies have already contributed to the functional analysis of several genes and processes related to skin research, continued progress requires understanding, awareness, and access to these mouse resources. This review will identify the strategies currently employed for the genetic manipulation of mice in skin research, and outline current resources and their limitations.
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Affiliation(s)
- Marlon R Schneider
- Institute of Molecular Animal Breeding and Biotechnology, Gene Center, LMU Munich, Munich, Germany.
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44
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Lu N, Liu J, Liu J, Zhang C, Jiang F, Wu H, Chen L, Zeng W, Cao X, Yan T, Wang G, Zhou H, Lin B, Yan X, Zhang XK, Zeng JZ. Antagonist effect of triptolide on AKT activation by truncated retinoid X receptor-alpha. PLoS One 2012; 7:e35722. [PMID: 22545132 PMCID: PMC3335786 DOI: 10.1371/journal.pone.0035722] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2011] [Accepted: 03/20/2012] [Indexed: 11/18/2022] Open
Abstract
Background Retinoid X receptor-alpha (RXRα) is a key member of the nuclear receptor superfamily. We recently demonstrated that proteolytic cleavage of RXRα resulted in production of a truncated product, tRXRα, which promotes cancer cell survival by activating phosphatidylinositol-3-OH kinase (PI3K)/AKT pathway. However, how the tRXRα-mediated signaling pathway in cancer cells is regulated remains elusive. Methodology/Principal Findings We screened a natural product library for tRXRα targeting leads and identified that triptolide, an active component isolated from traditional Chinese herb Trypterygium wilfordii Hook F, could modulate tRXRα-mediated cancer cell survival pathway in vitro and in animals. Our results reveal that triptolide strongly induces cancer cell apoptosis dependent on intracellular tRXRα expression levels, demonstrating that tRXRα serves as an important intracellular target of triptolide. We show that triptolide selectively induces tRXRα degradation and inhibits tRXRα-dependent AKT activity without affecting the full-length RXRα. Interestingly, such effects of triptolide are due to its activation of p38. Although triptolide also activates Erk1/2 and MAPK pathways, the effects of triptolide on tRXRα degradation and AKT activity are only reversed by p38 siRNA and p38 inhibitor. In addition, the p38 inhibitor potently inhibits tRXRα interaction with p85α leading to AKT inactivation. Our results demonstrate an interesting novel signaling interplay between p38 and AKT through tRXRα mediation. We finally show that targeting tRXRα by triptolide strongly activates TNFα death signaling and enhances the anticancer activity of other chemotherapies Conclusions/Significance Our results identify triptolide as a new xenobiotic regulator of the tRXRα-dependent survival pathway and provide new insight into the mechanism by which triptolide acts to induce apoptosis of cancer cells. Triptolide represents one of the most promising therapeutic leads of natural products of traditional Chinese medicine with unfortunate side-effects. Our findings will offer new strategies to develop improved triptolide analogs for cancer therapy.
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Affiliation(s)
- Na Lu
- School of Pharmaceutical Sciences and Institute for Biomedical Research, Xiamen University, Xiamen, China
| | - Jinxing Liu
- School of Pharmaceutical Sciences and Institute for Biomedical Research, Xiamen University, Xiamen, China
| | - Jie Liu
- School of Pharmaceutical Sciences and Institute for Biomedical Research, Xiamen University, Xiamen, China
| | - Chunyun Zhang
- School of Pharmaceutical Sciences and Institute for Biomedical Research, Xiamen University, Xiamen, China
| | - Fuquan Jiang
- School of Pharmaceutical Sciences and Institute for Biomedical Research, Xiamen University, Xiamen, China
| | - Hua Wu
- School of Pharmaceutical Sciences and Institute for Biomedical Research, Xiamen University, Xiamen, China
| | - Liqun Chen
- School of Pharmaceutical Sciences and Institute for Biomedical Research, Xiamen University, Xiamen, China
| | - Wenjun Zeng
- School of Pharmaceutical Sciences and Institute for Biomedical Research, Xiamen University, Xiamen, China
| | - Xihua Cao
- Cancer Center, Sanford-Burnham Medical Research Institute, La Jolla, California, United States of America
| | - Tingdong Yan
- School of Pharmaceutical Sciences and Institute for Biomedical Research, Xiamen University, Xiamen, China
| | - Guanghui Wang
- School of Pharmaceutical Sciences and Institute for Biomedical Research, Xiamen University, Xiamen, China
| | - Hu Zhou
- Cancer Center, Sanford-Burnham Medical Research Institute, La Jolla, California, United States of America
| | - Bingzhen Lin
- Cancer Center, Sanford-Burnham Medical Research Institute, La Jolla, California, United States of America
| | - Xiaomei Yan
- The Key Laboratory of Analytical Science, The Key Laboratory for Chemical Biology of Fujian Province, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - Xiao-kun Zhang
- School of Pharmaceutical Sciences and Institute for Biomedical Research, Xiamen University, Xiamen, China
- Cancer Center, Sanford-Burnham Medical Research Institute, La Jolla, California, United States of America
- * E-mail: (JZ); (XK)
| | - Jin-Zhang Zeng
- School of Pharmaceutical Sciences and Institute for Biomedical Research, Xiamen University, Xiamen, China
- * E-mail: (JZ); (XK)
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Abstract
The biochemical and genetic analysis of the VDR in patients with HVDRR has yielded important insights into the structure and function of the receptor in mediating 1,25(OH)2D3 action. Similarly, study of children affected by HVDRR continues to provide a more complete understanding of the biologic role of 1,25(OH)2D3 in vivo. A concerted investigative approach to HVDRR at the clinical, cellular, and molecular levels has proved valuable in gaining knowledge of the functions of the domains of the VDR and elucidating the detailed mechanism of action of 1,25(OH)2D3. These studies have been essential to promote the well-being of the families with HVDRR and in improving the diagnostic and clinical management of this rare genetic disease.
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46
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Ocadiz-delgado R, Castañeda-saucedo E, Indra AK, Hernandez-pando R, Flores-guizar P, Cruz-colin JL, Recillas-targa F, Perez-ishiwara G, Covarrubias L, Gariglio P. RXRα deletion and E6E7 oncogene expression are sufficient to induce cervical malignant lesions in vivo. Cancer Lett 2012; 317:226-36. [DOI: 10.1016/j.canlet.2011.11.031] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2011] [Revised: 11/23/2011] [Accepted: 11/23/2011] [Indexed: 01/01/2023]
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47
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Everts HB. Endogenous retinoids in the hair follicle and sebaceous gland. Biochim Biophys Acta 2012; 1821:222-9. [PMID: 21914489 PMCID: PMC3237781 DOI: 10.1016/j.bbalip.2011.08.017] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2011] [Revised: 08/12/2011] [Accepted: 08/29/2011] [Indexed: 12/19/2022]
Abstract
Vitamin A and its derivatives (retinoids) are critically important in the development and maintenance of multiple epithelial tissues, including skin, hair, and sebaceous glands, as shown by the detrimental effects of either vitamin A deficiency or toxicity. Thus, precise levels of retinoic acid (RA, active metabolite) are needed. These precise levels of RA are achieved by regulating several steps in the conversion of dietary vitamin A (retinol) to RA and RA catabolism. This review discusses the localization of RA synthesis to specific sites within the hair follicle and sebaceous gland, including their stem cells, during both homeostasis and disease states. It also discusses what is known about the specific roles of RA within the hair follicle and sebaceous gland. This article is part of a Special Issue entitled: Retinoid and Lipid Metabolism.
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Affiliation(s)
- Helen B Everts
- Department of Human Nutrition, The Oio State University, 350 Campell Hall, 1787 Neil Ave, Columbus, OH 43210, USA.
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48
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Rezvani HR, Ali N, Serrano-Sanchez M, Dubus P, Varon C, Ged C, Pain C, Cario-André M, Seneschal J, Taïeb A, de Verneuil H, Mazurier F. Loss of epidermal hypoxia-inducible factor-1α accelerates epidermal aging and affects re-epithelialization in human and mouse. J Cell Sci 2011; 124:4172-83. [PMID: 22193962 DOI: 10.1242/jcs.082370] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2023] Open
Abstract
In mouse and human skin, HIF-1α is constitutively expressed in the epidermis, mainly in the basal layer. HIF-1α has been shown to have crucial systemic functions: regulation of kidney erythropoietin production in mice with constitutive HIF-1α epidermal deletion, and hypervascularity following epidermal HIF-1α overexpression. However, its local role in keratinocyte physiology has not been clearly defined. To address the function of HIF-1α in the epidermis, we used the mouse model of HIF-1α knockout targeted to keratinocytes (K14-Cre/Hif1a(flox/flox)). These mice had a delayed skin phenotype characterized by skin atrophy and pruritic inflammation, partly mediated by basement membrane disturbances involving laminin-332 (Ln-332) and integrins. We also investigated the relevance of results of studies in mice to human skin using reconstructed epidermis and showed that HIF-1α knockdown in human keratinocytes impairs the formation of a viable reconstructed epidermis. A diminution of keratinocyte growth potential, following HIF-1α silencing, was associated with a decreased expression of Ln-322 and α6 integrin and β1 integrin. Overall, these results indicate a role of HIF-1α in skin homeostasis especially during epidermal aging.
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Affiliation(s)
- Hamid Reza Rezvani
- INSERM, Biothérapies des maladies génétiques et cancers, U1035, 146 rue Léo Saignat, Bordeaux, F-33000 France
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49
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Abstract
Hereditary Vitamin D Resistant Rickets (HVDRR) is a rare disease caused by mutations in the vitamin D receptor (VDR). The consequence of defective VDR is the inability to absorb calcium normally in the intestine. This leads to a constellation of metabolic abnormalities including hypocalcemia, secondary hyperparathyroidism and hypophosphatemia that cause the development of rickets at an early age in affected children. An interesting additional abnormality is the presence of alopecia in some children depending on the nature of the VDR mutation. The data indicate that VDR mutations that cause defects in DNA binding, RXR heterodimerization or absence of the VDR cause alopecia while mutations that alter VDR affinity for 1,25(OH)(2)D(3) or disrupt coactivator interactions do not cause alopecia. The cumulative findings indicate that hair follicle cycling is dependent on unliganded actions of the VDR. Further research is ongoing to elucidate the role of the VDR in hair growth and differentiation.
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Affiliation(s)
- Peter J Malloy
- Stanford University School of Medicine, Stanford, CA 94305-5103, USA
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50
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Simon DM, Mariani TJ. Role of PPARs and Retinoid X Receptors in the Regulation of Lung Maturation and Development. PPAR Res 2011; 2007:91240. [PMID: 17710236 PMCID: PMC1940052 DOI: 10.1155/2007/91240] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2007] [Accepted: 05/09/2007] [Indexed: 01/13/2023] Open
Abstract
Understanding lung development has significant importance to public health because of the fact that interruptions in the normal developmental processes can have prominent effects on childhood and adult lung health. It is widely appreciated that the retinoic acid (RA) pathway plays an important role in lung development. Additionally, PPARs are believed to partner with receptors of this pathway and therefore could be considered extensions of retinoic acid function, including during lung development. This review will begin by introducing the relationship between the retinoic acid pathway and PPARs followed by an overview of lung development stages and regulation to conclude with details on PPARs and the retinoic acid pathway as they may relate to lung development.
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Affiliation(s)
- Dawn M. Simon
- Division of Pulmonology, Allergy/Immunology, Cystic Fibrosis and Sleep, Department of Pediatrics, School of Medicine,
Emory University, Atlanta, GA 30322, USA
- *Dawn M. Simon:
| | - Thomas J. Mariani
- Division of Pulmonary Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
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