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Lee YG, Jung Y, Choi HK, Lee JI, Lim TG, Lee J. Natural Product-Derived Compounds Targeting Keratinocytes and Molecular Pathways in Psoriasis Therapeutics. Int J Mol Sci 2024; 25:6068. [PMID: 38892253 PMCID: PMC11172960 DOI: 10.3390/ijms25116068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 05/28/2024] [Accepted: 05/29/2024] [Indexed: 06/21/2024] Open
Abstract
Psoriasis is a chronic autoimmune inflammatory skin disorder that affects approximately 2-3% of the global population due to significant genetic predisposition. It is characterized by an uncontrolled growth and differentiation of keratinocytes, leading to the formation of scaly erythematous plaques. Psoriasis extends beyond dermatological manifestations to impact joints and nails and is often associated with systemic disorders. Although traditional treatments provide relief, their use is limited by potential side effects and the chronic nature of the disease. This review aims to discuss the therapeutic potential of keratinocyte-targeting natural products in psoriasis and highlight their efficacy and safety in comparison with conventional treatments. This review comprehensively examines psoriasis pathogenesis within keratinocytes and the various related signaling pathways (such as JAK-STAT and NF-κB) and cytokines. It presents molecular targets such as high-mobility group box-1 (HMGB1), dual-specificity phosphatase-1 (DUSP1), and the aryl hydrocarbon receptor (AhR) for treating psoriasis. It evaluates the ability of natural compounds such as luteolin, piperine, and glycyrrhizin to modulate psoriasis-related pathways. Finally, it offers insights into alternative and sustainable treatment options with fewer side effects.
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Affiliation(s)
- Yu Geon Lee
- Division of Food Functionality Research, Korea Food Research Institute, Wanju-gun 55365, Republic of Korea; (Y.G.L.); (Y.J.); (H.-K.C.); (J.-I.L.)
| | - Younjung Jung
- Division of Food Functionality Research, Korea Food Research Institute, Wanju-gun 55365, Republic of Korea; (Y.G.L.); (Y.J.); (H.-K.C.); (J.-I.L.)
| | - Hyo-Kyoung Choi
- Division of Food Functionality Research, Korea Food Research Institute, Wanju-gun 55365, Republic of Korea; (Y.G.L.); (Y.J.); (H.-K.C.); (J.-I.L.)
| | - Jae-In Lee
- Division of Food Functionality Research, Korea Food Research Institute, Wanju-gun 55365, Republic of Korea; (Y.G.L.); (Y.J.); (H.-K.C.); (J.-I.L.)
| | - Tae-Gyu Lim
- Department of Food Science & Biotechnology, College of Life Sciences, Sejong University, Seoul 05006, Republic of Korea;
- Carbohydrate Bioproduct Research Center, Department of Food Science & Biotechnology, Sejong University, Seoul 05006, Republic of Korea
| | - Jangho Lee
- Division of Food Functionality Research, Korea Food Research Institute, Wanju-gun 55365, Republic of Korea; (Y.G.L.); (Y.J.); (H.-K.C.); (J.-I.L.)
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Wiegand C, Hipler UC, Elsner P, Tittelbach J. Keratinocyte and Fibroblast Wound Healing In Vitro Is Repressed by Non-Optimal Conditions but the Reparative Potential Can Be Improved by Water-Filtered Infrared A. Biomedicines 2021; 9:biomedicines9121802. [PMID: 34944618 PMCID: PMC8698951 DOI: 10.3390/biomedicines9121802] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 11/19/2021] [Accepted: 11/26/2021] [Indexed: 11/16/2022] Open
Abstract
It is a general goal to improve wound healing, especially of chronic wounds. As light therapy has gained increasing attention, the positive influence on healing progression of water-filtered infrared A (wIRA), a special form of thermal radiation, has been investigated and compared to the detrimental effects of UV-B irradiation on wound closure in vitro. Models of keratinocyte and fibroblast scratches help to elucidate effects on epithelial and dermal healing. This study further used the simulation of non-optimal settings such as S. aureus infection, chronic inflammation, and anti-inflammatory conditions to determine how these affect scratch wound progression and whether wIRA treatment can improve healing. Gene expression analysis for cytokines (IL1A, IL6, CXCL8), growth (TGFB1, PDGFC) and transcription factors (NFKB1, TP53), heat shock proteins (HSP90AA1, HSPA1A, HSPD1), keratinocyte desmogleins (DSG1, DSG3), and fibroblast collagen (COL1A1, COL3A1) was performed. Keratinocyte and fibroblast wound healing under non-optimal conditions was found to be distinctly reduced in vitro. wIRA treatment could counteract the inflammatory response in infected keratinocytes as well as under chronic inflammatory conditions by decreasing pro-inflammatory cytokine gene expression and improve wound healing. In contrast, in the anti-inflammatory setting, wIRA radiation could re-initiate the acute inflammatory response necessary after injury to stimulate the regenerative processes and advance scratch closure.
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Engin B, Tanakol A, Bulut H, Songür A, Vehid HE, Gökalp E, Kutlubay Z, Özkoca D, Tüzün Y, Serdaroğlu S. Changes in serum TNF‐like weak inducer of apoptosis (TWEAK) levels and Psoriasis Area Severity Index (PASI) scores in plaque psoriasis patients treated with conventional versus anti‐TNF treatments. Int J Dermatol 2019; 59:207-215. [DOI: 10.1111/ijd.14646] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Revised: 07/30/2019] [Accepted: 08/15/2019] [Indexed: 12/11/2022]
Affiliation(s)
- Burhan Engin
- Department of Dermatology Cerrahpaşa Medical Faculty İstanbul University‐Cerrahpaşa Istanbul Turkey
| | - Ali Tanakol
- Department of Dermatology Cerrahpaşa Medical Faculty İstanbul University‐Cerrahpaşa Istanbul Turkey
| | - Huri Bulut
- Department of Biochemistry Medical Faculty Bezm‐i Alem University Istanbul Turkey
| | | | - Hayriye E. Vehid
- Department of Biostatistics Cerrahpaşa Medical Faculty İstanbul University‐Cerrahpaşa Istanbul Turkey
| | - Eral Gökalp
- Department of Biostatistics Cerrahpaşa Medical Faculty İstanbul University‐Cerrahpaşa Istanbul Turkey
| | - Zekayi Kutlubay
- Department of Dermatology Cerrahpaşa Medical Faculty İstanbul University‐Cerrahpaşa Istanbul Turkey
| | - Defne Özkoca
- Department of Dermatology Cerrahpaşa Medical Faculty İstanbul University‐Cerrahpaşa Istanbul Turkey
| | - Yalçın Tüzün
- Department of Dermatology Medical Park Bahçelievler Hospital Altınbaş University Istanbul Turkey
| | - Server Serdaroğlu
- Department of Dermatology Cerrahpaşa Medical Faculty İstanbul University‐Cerrahpaşa Istanbul Turkey
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Preparation of A Spaceflight: Apoptosis Search in Sutured Wound Healing Models. Int J Mol Sci 2017; 18:ijms18122604. [PMID: 29207508 PMCID: PMC5751207 DOI: 10.3390/ijms18122604] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 11/23/2017] [Accepted: 12/01/2017] [Indexed: 12/25/2022] Open
Abstract
To prepare the ESA (European Space Agency) spaceflight project “Wound healing and Sutures in Unloading Conditions”, we studied mechanisms of apoptosis in wound healing models based on ex vivo skin tissue cultures, kept for 10 days alive in serum-free DMEM/F12 medium supplemented with bovine serum albumin, hydrocortisone, insulin, ascorbic acid and antibiotics at 32 °C. The overall goal is to test: (i) the viability of tissue specimens; (ii) the gene expression of activators and inhibitors of apoptosis and extracellular matrix components in wound and suture models; and (iii) to design analytical protocols for future tissue specimens after post-spaceflight download. Hematoxylin-Eosin and Elastica-van-Gieson staining showed a normal skin histology with no signs of necrosis in controls and showed a normal wound suture. TdT-mediated dUTP-biotin nick end labeling for detecting DNA fragmentation revealed no significant apoptosis. No activation of caspase-3 protein was detectable. FASL, FADD, CASP3, CASP8, CASP10, BAX, BCL2, CYC1, APAF1, LAMA3 and SPP1 mRNAs were not altered in epidermis and dermis samples with and without a wound compared to 0 day samples (specimens investigated directly post-surgery). BIRC5, CASP9, and FN1 mRNAs were downregulated in epidermis/dermis samples with and/or without a wound compared to 0 day samples. BIRC2, BIRC3 were upregulated in 10 day wound samples compared to 0 day samples in epidermis/dermis. RELA/FAS mRNAs were elevated in 10 day wound and no wound samples compared to 0 day samples in dermis. In conclusion, we demonstrate that it is possible to maintain live skin tissue cultures for 10 days. The viability analysis showed no significant signs of cell death in wound and suture models. The gene expression analysis demonstrated the interplay of activators and inhibitors of apoptosis and extracellular matrix components, thereby describing important features in ex vivo sutured wound healing models. Collectively, the performed methods defining analytical protocols proved to be applicable for post-flight analyzes of tissue specimens after sample return.
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Activation of TRPV3 Regulates Inflammatory Actions of Human Epidermal Keratinocytes. J Invest Dermatol 2017; 138:365-374. [PMID: 28964718 DOI: 10.1016/j.jid.2017.07.852] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 07/07/2017] [Accepted: 07/19/2017] [Indexed: 01/19/2023]
Abstract
Transient receptor potential (TRP) ion channels were first characterized on neurons, where they are classically implicated in sensory functions; however, research in recent decades has shown that many of these channels are also expressed on nonneuronal cell types. Emerging findings have highlighted the role of TRP channels in the skin, where they have been shown to be important in numerous cutaneous functions. Of particular interest is TRPV3, which was first described on keratinocytes. Its functional importance was supported when its gain-of-function mutation was linked to Olmsted syndrome, which is characterized by palmoplantar keratoderma, periorifacial hyperkeratosis, diffuse hypotrichosis and alopecia, and itch. Despite these exciting results, we have no information about the role and functionality of TRPV3 on keratinocytes at the cellular level. In this study, we identified TRPV3 expression both on human skin and cultured epidermal keratinocytes. TRPV3 stimulation was found to function as a Ca2+-permeable ion channel that suppresses proliferation of epidermal keratinocytes and induces cell death. Stimulation of the channel also triggers a strong proinflammatory response via the NF-κB pathway. Collectively, our data show that TRPV3 is functionally expressed on human epidermal keratinocytes and that it plays a role in cutaneous inflammatory processes.
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Xiong Y, Chen H, Liu L, Lu L, Wang Z, Tian F, Zhao Y. microRNA-130a Promotes Human Keratinocyte Viability and Migration and Inhibits Apoptosis Through Direct Regulation of STK40-Mediated NF-κB Pathway and Indirect Regulation of SOX9-Meditated JNK/MAPK Pathway: A Potential Role in Psoriasis. DNA Cell Biol 2017; 36:219-226. [PMID: 28085489 DOI: 10.1089/dna.2016.3517] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Psoriasis is a chronic inflammatory skin disorder. The aim of this study was to determine a potential role of microRNA (miR)-130a in psoriasis, and underlying mechanism. Expression levels of miR-130a in psoriasis specimens and normal skin tissues were analyzed. MiR-130a mimic, inhibitor, miR-control, small interfering RNA (siRNA) specific serine/threonine kinase 40 (STK40), or sex-determining region Y chromosome-box 9 (SOX9) were transfected to human keratinocyte HaCaT cells, respectively. After transfection, the cell viability, apoptosis, and migration were determined. Luciferase reporter assay, quantitative reverse transcription-polymerase chain reaction, and western blot were performed to explore whether STK40 was a target of miR-130a. The effects of aberrant expressions of miR-130a, STK40, or SOX9 on key proteins of NF-κB and c-Jun N-terminal kinase (JNK)/mitogen-activated protein kinase (MAPK) pathway were assessed. The miR-130a levels were significantly higher in patients with psoriasis compared to the healthy controls (p < 0.01). Overexpressing miR-130a strikingly promoted HaCaT cell viability and migration and inhibited apoptosis (p < 0.01 or p < 0.05). We confirmed that STK40 was a direct target of miR-130a, and STK40 was involved in miR-130a-induced cell functions. Overexpressing miR-130a significantly upregulated NF-κB p65, SOX9, p-c-Jun, p-JNK, and p-p38MAPK proteins and silencing miR-130a downregulated them. In addition, silencing STK40 alleviated the effects of anti-miR-130a on SOX9 expression. Furthermore, silencing SOX9 also decreased levels of p-c-Jun, p-JNK, and p-p38MAPK proteins. MiR-130a regulates human keratinocyte HaCaT viability, migration and apoptosis might be by direct regulation of STK40-mediated NF-κB pathway and by indirect regulation of SOX9-mediated downstream JNK/MAPK signaling pathway.
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Affiliation(s)
- Ying Xiong
- Department of Dermatology, Linyi People's Hospital , Linyi, China
| | - Hongxiao Chen
- Department of Dermatology, Linyi People's Hospital , Linyi, China
| | - Liqian Liu
- Department of Dermatology, Linyi People's Hospital , Linyi, China
| | - Leihong Lu
- Department of Dermatology, Linyi People's Hospital , Linyi, China
| | - Zongshan Wang
- Department of Dermatology, Linyi People's Hospital , Linyi, China
| | - Fujun Tian
- Department of Dermatology, Linyi People's Hospital , Linyi, China
| | - Yongliang Zhao
- Department of Dermatology, Linyi People's Hospital , Linyi, China
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Abstract
BACKGROUND Caffeine has been shown to prevent ultraviolet radiation-induced carcinogenesis and to inhibit growth of melanoma cells in experimental studies. We evaluated the association among caffeine intake, coffee consumption, and melanoma risk among three large cohort studies. METHODS The analysis used data from 89,220 women in the Nurses' Health Study II (1991-2009), 74,666 women in the Nurses' Health Study (1980-2008), and 39,424 men in the Health Professionals Follow-up Study (1986-2008). We used Cox proportional hazards models to estimate the hazard ratios (HR) with 95% confidence intervals (CIs) of melanoma associated with dietary intakes. RESULTS We documented 2,254 melanoma cases over 4 million person-years of follow-up. After adjustment for other risk factors, higher total caffeine intake was associated with a lower risk of melanoma (≥393 mg/day vs. <60 mg/day: HR = 0.78, 95% CI = 0.64, 0.96; Ptrend = 0.048). The association was more apparent in women (≥393 mg/day vs. <60 mg/day: HR = 0.70, 95% CI = 0.58, 0.85; Ptrend = 0.001) than in men (HR = 0.94, 95% CI = 0.75, 1.2; Ptrend = 0.81), and more apparent for melanomas occurring on body sites with higher continuous sun exposure (head, neck, and extremities; ≥393 mg/day vs. <60 mg/day: HR = 0.71, 95% CI = 0.59, 0.86; Ptrend = 0.001) than for melanomas occurring on body sites with lower continuous sun exposure (trunk including shoulder, back, hip, abdomen, and chest; HR = 0.90, 95% CI = 0.70, 1.2; Ptrend = 0.60). This pattern of association was similar to that for caffeinated coffee consumption, whereas no association was found for decaffeinated coffee consumption and melanoma risk. CONCLUSIONS Increasing caffeine intake and caffeinated coffee consumption is associated with decreased risk of cutaneous malignant melanomas.
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Epidermal RelA Specifically Restricts Contact Allergen–Induced Inflammation and Apoptosis in Skin. J Invest Dermatol 2014; 134:2541-2550. [DOI: 10.1038/jid.2014.193] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 03/18/2014] [Accepted: 04/04/2014] [Indexed: 11/08/2022]
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Salminen A, Kauppinen A, Hiltunen M, Kaarniranta K. Epigenetic regulation of ASC/TMS1 expression: potential role in apoptosis and inflammasome function. Cell Mol Life Sci 2014; 71:1855-64. [PMID: 24287895 PMCID: PMC11113932 DOI: 10.1007/s00018-013-1524-9] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Revised: 10/25/2013] [Accepted: 11/14/2013] [Indexed: 12/11/2022]
Abstract
Cloning studies have revealed that the apoptosis-associated speck-like protein possessing a caspase-recruiting domain (ASC) and the target of methylation-induced silencing-1 (TMS) are identical proteins. ASC/TMS1 is a bipartite adaptor protein containing the N-terminal pyrin domain and the C-terminal caspase-recruitment domain. There is abundant literature on ASC/TMS1, mostly under the name TMS1, in the epigenetic regulation of apoptosis and carcinogenesis, whereas the abbreviation ASC has been adopted from studies on the assembly of inflammasomes and stimulation of inflammation. There is substantial literature emphasizing that there are common aspects in the regulation of apoptosis and inflammation, which may be related to the function of ASC/TMS1. The region of the transcription start site of ASC/TMS1 gene contains a 600-bp-long CpG island that is highly methylated and the transcription of ASC/TMS1 is repressed in several cancers. However, it is not known whether the ASC/TMS1-dependent epigenetic regulation controls the inflammasome functions and moreover whether this regulation has any role in the inflammation-mediated carcinogenesis or in the pathogenesis of age-related degenerative diseases. We will examine the mechanisms involved in the epigenetic regulation of ASC/TMS1 as well as their significance in the coordination of apoptosis and inflammasome functions. We will also review the role of aberrant methylation of ASC/TMS1 promoter in the function of inflammasomes, a major host defense system, in cellular housekeeping and carcinogenesis.
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Affiliation(s)
- Antero Salminen
- Department of Neurology, Institute of Clinical Medicine, University of Eastern Finland, PO Box 1627, 70211, Kuopio, Finland,
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Zippi M, Pica R, De Nitto D, Paoluzi P. Biological therapy for dermatological manifestations of inflammatory bowel disease. World J Clin Cases 2013; 1:74-78. [PMID: 24303470 PMCID: PMC3845939 DOI: 10.12998/wjcc.v1.i2.74] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2013] [Revised: 02/18/2013] [Accepted: 03/29/2013] [Indexed: 02/05/2023] Open
Abstract
Ulcerative colitis and Crohn’s disease are the two forms of inflammatory bowel disease (IBD). The advent of biological drugs has significantly changed the management of these conditions. Skin manifestations are not uncommon in IBD. Among the reactive lesions (immune-mediated extraintestinal manifestations), erythema nodosum (EN) and pyoderma gangrenosum (PG) are the two major cutaneous ills associated with IBD, while psoriasis is the dermatological comorbidity disease observed more often. In particular, in the last few years, anti-tumor necrosis factor (TNF)-α agents have been successfully used to treat psoriasis, especially these kinds of lesions that may occur during the treatment with biological therapies. The entity of the paradoxical manifestations has been relatively under reported as most lesions are limited and a causal relationship with the treatment is often poorly understood. The reason for this apparent side-effect of the therapy still remains unclear. Although side effects may occur, their clinical benefits are undoubted. This article reviews the therapeutic effects of the two most widely used anti-TNF-α molecules, infliximab (a fusion protein dimer of the human TNF-α receptor) and adalimumab (a fully human monoclonal antibody to TNF-α), for the treatment of the major cutaneous manifestations associated with IBD (EN, PG and psoriasis).
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Abstract
Because of their genetically determined capacity to respond to pro-inflammatory stimuli, keratinocytes have a crucial role in the pathogenesis of psoriasis. Upon IFN-γ and TNF-α exposure, psoriatic keratinocytes express exaggerated levels of inflammatory mediators, and show aberrant hyperproliferation and terminal differentiation. The thickening of psoriasic skin also results from a peculiar resistance of keratinocytes to cytokine-induced apoptosis. In this study, we investigated on the molecular mechanisms concurring to the resistance of psoriatic keratinocytes to cell death, focusing on the role having suppressor of cytokine signaling (SOCS)1 and SOCS3, two molecules abundantly expressed in IFN-γ/TNF-α-activated psoriatic keratinocytes, in sustaining anti-apoptotic pathways. We found that SOCS1 and SOCS3 suppress cytokine-induced apoptosis by sustaining the activation of the PI3K/AKT pathway in keratinocytes. The latter determines the activation of the anti-apoptotic NF-κB cascade and, in parallel, the inhibition of the pro-apoptotic BAD function in keratinocytes. For the first time, we report that phosphorylated AKT and phosphorylated BAD are strongly expressed in lesional psoriatic skin, compared with healthy or not lesional skin, and they strictly correlate to the high expression of SOCS1 and SOCS3 molecules in the psoriatic epidermis. Finally, the depletion of SOCS1 and SOCS3, as well as the chemical inactivation of PI3K activity in psoriatic keratinocytes, definitively unveils the role of PI3K/AKT cascade on the resistance of diseased keratinocytes to apoptosis.
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Henri P, Beaumel S, Guezennec A, Poumès C, Stoebner PE, Stasia MJ, Guesnet J, Martinez J, Meunier L. MC1R expression in HaCaT keratinocytes inhibits UVA-induced ROS production via NADPH oxidase- and cAMP-dependent mechanisms. J Cell Physiol 2012; 227:2578-85. [PMID: 21898403 DOI: 10.1002/jcp.22996] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Ultraviolet A (UVA) radiations are responsible for deleterious effects, mainly due to reactive oxygen species (ROS) production. Alpha-melanocyte stimulating hormone (α-MSH) binds to melanocortin-1 receptor (MC1R) in melanocytes to stimulate pigmentation and modulate cutaneous inflammatory responses. MC1R may be induced in keratinocytes after UV exposure. To investigate the effect of MC1R signaling on UVA-induced ROS (UVA-ROS) production, we generated HaCaT cells that stably express human MC1R (HaCaT-MC1R) or the Arg151Cys (R(151)C) non-functional variant (HaCaT-R(151)C). We then assessed ROS production immediately after UVA exposure and found that: (1) UVA-ROS production was strongly reduced in HaCaT-MC1R but not in HaCaT-R(151)C cells compared to parental HaCaT cells; (2) this inhibitory effect was further amplified by incubation of HaCaT-MC1R cells with α-MSH before UVA exposure; (3) protein kinase A (PKA)-dependent NoxA1 phosphorylation was increased in HaCaT-MC1R compared to HaCaT and HaCaT-R(151)C cells. Inhibition of PKA in HaCaT-MC1R cells resulted in a marked increase of ROS production after UVA irradiation; (4) the ability of HaCaT-MC1R cells to produce UVA-ROS was restored by inhibiting epidermal growth factor receptor (EGFR) or extracellular signal-regulated kinases (ERK) activity before UVA exposure. Our findings suggest that constitutive activity of MC1R in keratinocytes may reduce UVA-induced oxidative stress via EGFR and cAMP-dependent mechanisms.
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Affiliation(s)
- Pauline Henri
- Institute of Biomolecules Max Mousseron (IBMM), University Montpellier I and II, UMR CNRS 5247, Montpellier Cedex 5, France
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Liu Y, Wang L, Kikuiri T, Akiyama K, Chen C, Xu X, Yang R, Chen W, Wang S, Shi S. Mesenchymal stem cell-based tissue regeneration is governed by recipient T lymphocytes via IFN-γ and TNF-α. Nat Med 2011; 17:1594-601. [PMID: 22101767 PMCID: PMC3233650 DOI: 10.1038/nm.2542] [Citation(s) in RCA: 514] [Impact Index Per Article: 39.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2011] [Accepted: 09/29/2011] [Indexed: 12/31/2022]
Abstract
Stem cell-based regenerative medicine is a promising approach in tissue reconstruction. Here we show that proinflammatory T cells inhibit the ability of exogenously added bone marrow mesenchymal stem cells (BMMSCs) to mediate bone repair. This inhibition is due to interferon γ (IFN-γ)-induced downregulation of the runt-related transcription factor 2 (Runx-2) pathway and enhancement of tumor necrosis factor α (TNF-α) signaling in the stem cells. We also found that, through inhibition of nuclear factor κB (NF-κB), TNF-α converts the signaling of the IFN-γ-activated, nonapoptotic form of TNF receptor superfamily member 6 (Fas) in BMMSCs to a caspase 3- and caspase 8-associated proapoptotic cascade, resulting in the apoptosis of these cells. Conversely, reduction of IFN-γ and TNF-α concentrations by systemic infusion of Foxp3(+) regulatory T cells, or by local administration of aspirin, markedly improved BMMSC-based bone regeneration and calvarial defect repair in C57BL/6 mice. These data collectively show a previously unrecognized role of recipient T cells in BMMSC-based tissue engineering.
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Affiliation(s)
- Yi Liu
- Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, 2250 Alcazar Street, CSA 103, Los Angeles, CA 90033, USA University of Southern California, 2250 Alcazar Street, CSA 103, Los Angeles, CA 90033, USA
- Molecular Laboratory for Gene Therapy and Tooth Regeneration, Capital Medical University School of Stomatology, Tian Tan Xi Li No. 4, Beijing 100050, China
| | - Lei Wang
- Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, 2250 Alcazar Street, CSA 103, Los Angeles, CA 90033, USA University of Southern California, 2250 Alcazar Street, CSA 103, Los Angeles, CA 90033, USA
- Fourth Military Medical University School of Stomatology, Xi’an, Shanxi 710032, China
| | - Takashi Kikuiri
- Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, 2250 Alcazar Street, CSA 103, Los Angeles, CA 90033, USA University of Southern California, 2250 Alcazar Street, CSA 103, Los Angeles, CA 90033, USA
| | - Kentaro Akiyama
- Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, 2250 Alcazar Street, CSA 103, Los Angeles, CA 90033, USA University of Southern California, 2250 Alcazar Street, CSA 103, Los Angeles, CA 90033, USA
| | - Chider Chen
- Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, 2250 Alcazar Street, CSA 103, Los Angeles, CA 90033, USA University of Southern California, 2250 Alcazar Street, CSA 103, Los Angeles, CA 90033, USA
| | - Xingtian Xu
- Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, 2250 Alcazar Street, CSA 103, Los Angeles, CA 90033, USA University of Southern California, 2250 Alcazar Street, CSA 103, Los Angeles, CA 90033, USA
- Key Laboratory of Translational Research, Tong Ji University School of Stomatology, No. 399 Yan Chang Zhong Road, Shanghai 200072, China
| | - Ruili Yang
- Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, 2250 Alcazar Street, CSA 103, Los Angeles, CA 90033, USA University of Southern California, 2250 Alcazar Street, CSA 103, Los Angeles, CA 90033, USA
| | - WanJun Chen
- National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, Maryland, USA
| | - Songlin Wang
- Molecular Laboratory for Gene Therapy and Tooth Regeneration, Capital Medical University School of Stomatology, Tian Tan Xi Li No. 4, Beijing 100050, China
| | - Songtao Shi
- Center for Craniofacial Molecular Biology, Ostrow School of Dentistry, University of Southern California, 2250 Alcazar Street, CSA 103, Los Angeles, CA 90033, USA University of Southern California, 2250 Alcazar Street, CSA 103, Los Angeles, CA 90033, USA
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Effects of Thai medicinal herb extracts with anti-psoriatic activity on the expression on NF-κB signaling biomarkers in HaCaT keratinocytes. Molecules 2011; 16:3908-32. [PMID: 21555979 PMCID: PMC6263342 DOI: 10.3390/molecules16053908] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2011] [Revised: 04/25/2011] [Accepted: 05/04/2011] [Indexed: 01/01/2023] Open
Abstract
Psoriasis is a chronic inflammatory skin disorder characterized by rapid proliferation of keratinocytes and incomplete keratinization. Discovery of safer and more effective anti-psoriatic drugs remains an area of active research at the present time. Using a HaCaT keratinocyte cell line as an in vitro model, we had previously found that ethanolic extracts from three Thai medicinal herbs, namely Alpinia galanga, Curcuma longa and Annona squamosa, possessed anti-psoriatic activity. In the current study, we aimed at investigating if these Thai medicinal herb extracts played a molecular role in suppressing psoriasis via regulation of NF-κB signaling biomarkers. Using semi-quantitative RT-PCR and report gene assays, we analyzed the effects of these potential herbal extracts on 10 different genes of the NF-κB signaling network in HaCaT cells. In accordance with our hypothesis, we found that the extract derived from Alpinia galanga significantly increased the expression of TNFAIP3 and significantly reduced the expression of CSF-1 and NF-κB2. Curcuma longa extract significantly decreased the expression of CSF-1, IL-8, NF-κB2, NF-κB1 and RelA, while Annona squamosa extract significantly lowered the expression of CD40 and NF-κB1. Therefore, this in vitro study suggested that these herbal extracts capable of functioning against psoriasis, might exert their activity by controlling the expression of NF-κB signaling biomarkers.
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Sohn EJ, Kim DW, Kim YN, Kim SM, Lim SS, Kang TC, Kwon HY, Kim DS, Cho SW, Han KH, Park J, Eum WS, Hwang HS, Choi SY. Effects of pergolide mesylate on transduction efficiency of PEP-1-catalase protein. Biochem Biophys Res Commun 2011; 406:336-40. [PMID: 21324306 DOI: 10.1016/j.bbrc.2011.02.038] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2011] [Accepted: 02/09/2011] [Indexed: 10/18/2022]
Abstract
The low transduction efficiency of various proteins is an obstacle to their therapeutic application. However, protein transduction domains (PTDs) are well-known for a highly effective tool for exogenous protein delivery to cells. We examined the effects of pergolide mesylate (PM) on the transduction of PEP-1-catalase into HaCaT human keratinocytes and mice skin and on the anti-inflammatory activity of PEP-1-catatase against 12-O-tetradecanoylphorbol-13-acetate (TPA)-induced inflammation using Western blot and histological analysis. PM enhanced the time- and dose-dependent transduction of PEP-1-catalase into HaCaT cells without affecting the cellular toxicity. In a mouse edema model, PEP-1-catalase inhibited the increased expressions of inflammatory mediators and cytokines such as cyclooxygenase-2, inducible nitric oxide synthase, interleukin-6 and -1β, and tumor necrosis factor-α induced by TPA. On the other hand, PM alone failed to exert any significant anti-inflammatory effects. However, the anti-inflammatory effect of co-treatment with PEP-1-catalase and PM was more potent than that of PEP-1-catalase alone. Our results indicate that PM may enhance the delivery of PTDs fusion therapeutic proteins to target cells and tissues and has potential to increase their therapeutic effects of such drugs against various diseases.
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Affiliation(s)
- Eun Jeong Sohn
- Department of Biomedical Science and Research Institute of Bioscience and Biotechnology, Hallym University, Chunchon 200-702, Republic of Korea
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Chung WH, Hung SI. Genetic markers and danger signals in stevens-johnson syndrome and toxic epidermal necrolysis. Allergol Int 2010; 59:325-32. [PMID: 20962567 DOI: 10.2332/allergolint.10-rai-0261] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2010] [Indexed: 12/26/2022] Open
Abstract
Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN) are life-threatening adverse reactions, which could be induced by a variety of drugs. It was proposed that human leukocyte antigen (HLA)-restricted presentation of antigens (drugs or their metabolites) to T lymphocytes initiates the immune reactions of SJS/TEN. However, the genetic susceptibility and the exact pathogenesis were not clear until the recent studies. We first identified that HLA-B*1502 is strongly associated with carbamazepine (CBZ)-induced SJS/TEN and HLA-B*5801 with allopurinol-SJS/TEN in Han Chinese. The same associations had been validated across different human populations. For the downstream danger signals, Fas-Fas ligand (FasL) and perforin/granzyme B had been advocated as cytotoxic mediators for keratinocyte death in SJS/TEN. However, expression levels of these cytotoxic proteins from the skin lesions were too low to explain the distinct and extensive epidermal necrosis. Our recent study identified that the granulysin, a cytotoxic protein released from cytotoxic T cells or natural killer (NK) cells, is a key mediator for disseminated keratinocyte death in SJS/TEN. This article aims to provide an overview of both of the genomic and immunologic perspectives of SJS/TEN. These studies give us a better understanding of the immune mechanisms, biomarkers for disease prevention and early diagnosis, as well as providing the therapeutic targets for the treatments of SJS/TEN.
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Affiliation(s)
- Wen-Hung Chung
- Department of Dermatology, Chang Gung Memorial Hospital, Chang Gung University, Taipei, Taiwan.
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Chrysotoxine, a novel bibenzyl compound, inhibits 6-hydroxydopamine induced apoptosis in SH-SY5Y cells via mitochondria protection and NF-κB modulation. Neurochem Int 2010; 57:676-89. [DOI: 10.1016/j.neuint.2010.08.007] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2010] [Revised: 07/15/2010] [Accepted: 08/04/2010] [Indexed: 02/06/2023]
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18
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Hamajima Y, Komori M, Preciado DA, Choo DI, Moribe K, Murakami S, Ondrey FG, Lin J. The role of inhibitor of DNA-binding (Id1) in hyperproliferation of keratinocytes: the pathological basis for middle ear cholesteatoma from chronic otitis media. Cell Prolif 2010; 43:457-63. [PMID: 20887552 DOI: 10.1111/j.1365-2184.2010.00695.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVES A hallmark of cholesteatoma is hyperproliferation of keratinocytes with abundant production of keratins in the middle ear under chronic inflammatory conditions. However, little is known about the driving force of cellular proliferation and keratin production of cholesteatomal matrix. The purpose of this study was to investigate the cellular proliferation and keratin production of keratinocytes under the influence of Id1, a candidate transcription factor to cell proliferation. MATERIALS AND METHODS Keratinocytes were transfected with Id1 and the responses of keratinocytes to Id1 were studied by using cellular and molecular biologic methods. RESULTS Id1 positively contributed to the cell cycle progression and negatively to the p16(Ink4a) downregulation via the nuclear factor-kappa B (NF-κB)/cyclin D1 pathway. Id1 significantly increased the promoter activity of NF-κB which, in turn, up-regulated the expression of cyclin D1 and keratin 10 in keratinocytes. Specific NF-κB inhibitors (pyrrolidine dithiocarbamate, PDTC), or dominant-negative inhibitor (I kappa B alpha mutant, IκBαM) abrogated the Id1-induced cell proliferation and keratin 10 production whereas p65, a subunit of the NF-κB heterodimer and an enhancer of the NF-κB activity, strengthened the Id1-induced cell proliferation and keratin 10 production. CONCLUSIONS Id1 contributed to hyperproliferation of keratinocytes via enhancement of cell cycle progression, removal of cell cycle inhibition, and simultaneously increased keratin production.
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Affiliation(s)
- Y Hamajima
- Department of Otolaryngology-Head and Neck Surgery, University of Minnesota, Minneapolis, MN 55455, USA
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Moon DO, Choi YH, Moon SK, Kim WJ, Kim GY. Butein suppresses the expression of nuclear factor-kappa B-mediated matrix metalloproteinase-9 and vascular endothelial growth factor in prostate cancer cells. Toxicol In Vitro 2010; 24:1927-34. [DOI: 10.1016/j.tiv.2010.08.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2010] [Revised: 08/02/2010] [Accepted: 08/03/2010] [Indexed: 10/19/2022]
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NFX1 plays a role in human papillomavirus type 16 E6 activation of NFkappaB activity. J Virol 2010; 84:11461-9. [PMID: 20739528 DOI: 10.1128/jvi.00538-10] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
High-risk human papillomavirus (HR HPV) requires differentiating epithelial cells to continue to divide in order to replicate the viral DNA. To achieve this, HPV perturbs several regulatory pathways, including cellular apoptosis and senescence signals. HPV E6 has been identified as a regulator of the NFκB signaling pathway, a pathway important in many cellular processes, as well as regulation of virus-host cell interactions. We report here that NFX1-91, an endogenously expressed transcriptional regulator of human telomerase reverse transcriptase (hTERT) that is targeted by HPV type 16 (HPV16) E6/E6-associated protein (E6AP) for degradation, is also critical for regulation of the NFκB pathway by HPV16 E6. Microarray analysis revealed induction of NFκB-responsive genes and reduction of NFκB inhibitors with knockdown of NFX1-91. Knockdown of NFX1-91 induced downregulation of p105, an NFκB inhibitor in both primary human foreskin keratinocytes (HFKs) and HCT116 cells. Chromatin immunoprecipitation assays further confirmed that NFX1-91 bound to the p105 promoter and upregulated its expression. Similarly, in HPV16 E6-positive cells, reduction of p105 expression was observed, paralleling knockdown of NFX1-91 expression. Overall, our data suggest a mechanism for HPV16 E6 activation of the NFκB pathway through NFX1-91. Also, it provides evidence that NFX1-91 can function as a dual regulator, not only a transcriptional repressor, but also a transcriptional activator, when bound to DNA.
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OKHLOPKOV VA, MEDVEDCHIKOV EK, DOLGIKH TI, PRAVDINA OV, GORODILOV RV, ZARAYEVA IF. Assessment of the cytokine profile in psoriasis patients against the background of an immune-modulating therapy. VESTNIK DERMATOLOGII I VENEROLOGII 2010. [DOI: 10.25208/vdv890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
The authors examined the clinical effect and dynamics of immunological indices (IL-1, IL-6, TNF-, IFN-) at the progressing
and stationary stages of psoriasis with the administration of Stemokin®. A reliable reduction of IL-1, TNF- и IFN- was observed
against the background of treatment and was accompanied with an evident clinical effect. Two variants of the immune system
response were revealed for the complex therapy.
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Adams S, Valchanova RS, Munz B. RIP2: A novel player in the regulation of keratinocyte proliferation and cutaneous wound repair? Exp Cell Res 2010; 316:728-36. [DOI: 10.1016/j.yexcr.2009.12.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2009] [Revised: 12/01/2009] [Accepted: 12/01/2009] [Indexed: 12/25/2022]
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Ridd K, Dhir S, Smith AG, Gant TW. Defective TPA signalling compromises HaCat cells as a human in vitro skin carcinogenesis model. Toxicol In Vitro 2009; 24:910-5. [PMID: 19945525 DOI: 10.1016/j.tiv.2009.11.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2009] [Revised: 11/16/2009] [Accepted: 11/24/2009] [Indexed: 10/20/2022]
Abstract
HaCat cells, a human keratinocyte line, are commonly utilised as an in vitro cell model for toxicity testing and the discernment of processes of chemically induced skin carcinogenesis. Here, as part of an ongoing program of carcinogenesis research, we tested the genomic transcriptional response of two keratinocyte cell lines HaCat (human) and Pam212 (mouse) to 12-O-tetradecanoylphorbol 13-acetate (TPA), one of the most studied skin carcinoma promoting agents, and compared this with the response in primary keratinocytes. Differences in the genomic response profile indicated an insufficiency in the MEK/ERK pathway signalling in HaCat but not Pam212 cells compared to primary keratinocytes. TPA can also activate NFkappaB and so we tested whether this was also deficient in the HaCat cells using TNFalpha which signals directly to NFkappaB. By this method NFkappaB was found to be equally active in both HaCat and Pam212 cells. Analysis of ERK phosphorylation showed that while TPA mediated ERK phosphorylation occurred in both cell lines it was more robust and difficult to inhibit in Pam212 cells suggesting that there may be an insufficiency in this step in HaCat cells leading to a reduced response. Overall these data indicate that caution should be employed when using HaCat cells as an in vitro skin model for biochemical research or toxicological evaluation.
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Affiliation(s)
- Katie Ridd
- Medical Research Council Toxicology Unit, Hodgkin Building, University of Leicester, PO Box 138, Lancaster Road, Leicester LE1 9HN, UK
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24
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Garcin G, Le Gallic L, Stoebner PE, Guezennec A, Guesnet J, Lavabre-Bertrand T, Martinez J, Meunier L. Constitutive Expression of MC1R in HaCaT Keratinocytes Inhibits Basal and UVB-induced TNF-α Production. Photochem Photobiol 2009; 85:1440-50. [DOI: 10.1111/j.1751-1097.2009.00598.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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25
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Zhou G, Xia K, Du GF, Chen XM, Xu XY, Lu R, Zhou HM. Activation of nuclear factor-kappa B correlates with tumor necrosis factor-alpha in oral lichen planus: a clinicopathologic study in atrophic-erosive and reticular form. J Oral Pathol Med 2009; 38:559-64. [DOI: 10.1111/j.1600-0714.2009.00779.x] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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26
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Daehn IS, Varelias A, Rayner TE. T-lymphocyte-induced, Fas-mediated apoptosis is associated with early keratinocyte differentiation. Exp Dermatol 2009; 19:372-80. [PMID: 19645855 DOI: 10.1111/j.1600-0625.2009.00917.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The development of eczematous lesions is thought to be due in part to a breakdown in skin barrier function as a result of T lymphocytes (T cells) invading the skin causing epidermal keratinocyte apoptosis. In this study, we investigated the interaction of T cells and keratinocytes on apoptosis and terminal differentiation using an in vitro co-culture system. Experiments were performed using the HaCaT keratinocyte cell line or normal human epidermal keratinocytes. Activated human peripheral blood-derived T cells were found to induce Fas-dependent keratinocyte apoptosis by up to sixfold. Increased Fas was associated with increased IFN-gamma. The T-cell apoptotic signal was found to target preferentially keratinocytes in the very early stages of terminal differentiation, such as those with low levels of alpha 6-integrin expression, and result in subsequent increased caspase 3 activity. This observation was accompanied by a marked increase in keratinocyte ICAM-1 expression and its ligand LFA-1 on T cells. Our data suggest that T cells may initiate the onset of keratinocyte terminal differentiation making them more susceptible to Fas-dependent cell death signals delivered by the T cells.
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Affiliation(s)
- Ilse S Daehn
- Women's & Children's Health Research Institute, Women's and Children's Hospital, North Adelaide, SA, Australia.
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27
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Fiorino G, Allez M, Malesci A, Danese S. Review article: anti TNF-alpha induced psoriasis in patients with inflammatory bowel disease. Aliment Pharmacol Ther 2009; 29:921-7. [PMID: 19210297 DOI: 10.1111/j.1365-2036.2009.03955.x] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Anti TNF-alpha agents are used successfully for several autoimmune diseases, including IBD and psoriasis. An emerging challenge is the increasing incidence of anti TNF-alpha induced psoriasis. A total of 120 cases have been currently reported, of whom 18 patients were treated with biological agents for IBD. OBJECTIVES To analyse all cases of anti TNF-alpha induced psoriasis in patients with IBD in the literature and to investigate potential mechanisms of action. METHODS A literature review was performed in the PubMed, Medline, Cochrane and EMBASE databases, with simple analysis of demographic data, drug administration and psoriasis onset. Risk and incidence patient/year/duration (pyd) was calculated. RESULTS A total of 18 patients with IBD treated by anti TNF-alpha agents developed drug-induced psoriasis of which, 17 patients developed with infliximab, one with adalimumab. The most frequent time of onset is between 3rd and 4th infusion of infliximab. Withdrawal of infliximab led to regression of lesions in 16 patients. In six patients, infliximab was reintroduced with no further recurrence of psoriasis. CONCLUSIONS Although anti TNF-alpha induced psoriasis is extremely rare, understanding the mechanism will be a key step towards better realizing the role played by TNF-alpha and its pharmacological inhibitors in immune-mediated diseases.
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Affiliation(s)
- G Fiorino
- GI Unit, Dipartimento di Scienze Cliniche, Policlinico Umberto I, Rome, Italy
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28
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Abstract
The skin is the largest organ of the body and protects the organism against external physical, chemical and biological insults, such as wounding, ultraviolet radiation and micro-organisms. The epidermis is the upper part of the skin that is continuously renewed. The keratinocytes are the major cell type in the epidermis and undergo a specialized form of programmed cell death, called cornification, which is different from classical apoptosis. In keep with this view, several lines of evidence indicate that NF-kB is an important factor providing protection against keratinocyte apoptosis in homeostatic and inflammatory conditions. In contrast, the hair follicle is an epidermal appendage that shows cyclic apoptosis-driven involution, as part of the normal hair cycle. The different cell death programs need to be well orchestrated to maintain skin homeostasis. One of the major environmental insults to the skin is UVB radiation, causing the occurrence of apoptotic sunburn cells. Deregulation of cell death mechanisms in the skin can lead to diseases such as cancer, necrolysis and graft-versus-host disease. Here we review the apoptotic and the anti-apoptotic mechanisms in skin homeostasis and disease.
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Van Laethem A, Garmyn M, Agostinis P. Starting and propagating apoptotic signals in UVB irradiated keratinocytes. Photochem Photobiol Sci 2009; 8:299-308. [DOI: 10.1039/b813346h] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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30
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Moon DO, Kim MO, Kang SH, Choi YH, Kim GY. Sulforaphane suppresses TNF-alpha-mediated activation of NF-kappaB and induces apoptosis through activation of reactive oxygen species-dependent caspase-3. Cancer Lett 2008; 274:132-42. [PMID: 18952368 DOI: 10.1016/j.canlet.2008.09.013] [Citation(s) in RCA: 103] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2008] [Revised: 06/20/2008] [Accepted: 09/09/2008] [Indexed: 01/09/2023]
Abstract
Sulforaphane (SFN) is a biologically active compound extracted from cruciferous vegetables, and possessing potent anti-cancer and anti-inflammatory activities. Here, we show that tumor necrosis factor-alpha (TNF-alpha), in combination with a sub-toxic dose of SFN, significantly triggered apoptosis in TNF-alpha-resistant leukemia cells (THP-1, HL60, U937, and K562), which was associated with caspase activity and poly (ADP-ribose)-polymerase cleavage. We also report that SFN non-specifically inhibited TNF-alpha-induced NF-kappaB activation through the inhibition of IkappaBalpha phosphorylation, IkappaBalpha degradation, and p65 nuclear translocation. This inhibition correlated with the suppression of NF-kappaB-dependent genes involved in anti-apoptosis (IAP-1, IAP-2, XIAP, Bcl-2, and Bcl-xL), cell proliferation (c-Myc, COX-2, and cyclin D1), and metastasis (VEGF and MMP-9). These effects suggest that SFN inhibits TNF-alpha-induced NF-kappaB activation through the suppression of IkappaBalpha degradation, leading to reduced expression of NF-kappaB-regulated gene products. Combined treatment with SFN and TNF-alpha was also accompanied by the generation of reactive oxygen species (ROS). Pre-treatment with N-acetyl-l-cysteine significantly attenuated the combined treatment-induced ROS generation and caspase-3-dependent apoptosis, implying the involvement of ROS in this type of cell death. In conclusion, the results of the present study indicate that SFN suppresses TNF-alpha-induced NF-kappaB activity and induces apoptosis through activation of ROS-dependent caspase-3.
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Affiliation(s)
- Dong-Oh Moon
- Department of Marine Life Science, Cheju National University, Jeju 690-756, Republic of Korea
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31
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Kim MO, Moon DO, Heo MS, Lee JD, Jung JH, Kim SK, Choi YH, Kim GY. Pectenotoxin-2 abolishes constitutively activated NF-kappaB, leading to suppression of NF-kappaB related gene products and potentiation of apoptosis. Cancer Lett 2008; 271:25-33. [PMID: 18602210 DOI: 10.1016/j.canlet.2008.05.034] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2007] [Revised: 12/29/2007] [Accepted: 05/23/2008] [Indexed: 01/13/2023]
Abstract
Although pectenotoxin-2 (PTX-2) is known to modify the actin cytoskeleton, very little is known about its apoptosis mechanism. In this study, we investigated whether PTX-2 induces apoptotic effects through suppression of the NF-kappaB signaling pathway in several leukemia cell types. PTX-2 significantly induced growth inhibition and apoptosis in a dose-dependent manner. Treatment with PTX-2 also significantly increased caspase-3 activity and poly (ADP-ribose) polymerase (PARP) cleavage, however caspase-3 inhibitor z-DEVD-fmk significantly inhibited PTX-2-induced cell death. These data suggest that the activation of caspase-3 is associated with PTX-2-induced apoptosis. NF-kappaB has also been shown to inhibit apoptosis in response to chemotherapeutic agents. As examined by the DNA-binding of NF-kappaB activation, we found that PTX-2 suppressed constitutive NF-kappaB activation and determined by p65 and p50 nuclear translocation, and IkappaBalpha degradation through dephosphorylation of Akt. Attenuation of constitutive NF-kappaB activity by pretreatment with pyrrolidine dithiocarbamate (PDTC), an NF-kappaB nuclear translocation inhibitor, induced significantly apoptosis in the presence of PTX-2. In addition, treatment of PTX-2 down-regulated NF-kappaB-dependent gene expression, Cox-2, IAP-1, IAP-2 and XIAP, at the transcriptional and translational level. Taken together, these results suggest that anti-cancer activities induced by PTX-2 may be mediated in part through suppression of constitutive NF-kappaB activity.
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Affiliation(s)
- Mun-Ock Kim
- Department of Microbiology, College of Natural Sciences, Pusan National University, Busan, Republic of Korea
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da Costa RMA, Quayle C, de Fátima Jacysyn J, Amarante-Mendes GP, Sarasin A, Menck CFM. Resistance to ultraviolet-induced apoptosis in DNA repair deficient growth arrested human fibroblasts is not related to recovery from RNA transcription blockage. Mutat Res 2008; 640:1-7. [PMID: 18207202 DOI: 10.1016/j.mrfmmm.2007.11.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2007] [Revised: 10/18/2007] [Accepted: 11/30/2007] [Indexed: 05/25/2023]
Abstract
The impact of ultraviolet (UV-C) photoproducts on apoptosis induction was investigated in growth arrested (confluent) and proliferating human primary fibroblasts. Confluent fibroblasts were more resistant to UV-C-induced apoptosis than proliferating cells, and this was observed for normal human cells and for cells from patients with Cockayne and trichothiodystrophy syndromes, deficient in transcription coupled repair. This resistance was sustained for at least seven days and was not due to DNA repair efficiency, as the removal of CPDs in the genome was similar under both growth conditions. There was no correlation between reduced apoptosis and RNA synthesis recovery. Following UV-C treatment, proliferating and confluent fibroblasts showed a similar level of RNA synthesis inhibition and recovery from transcription blockage. These results support the hypothesis that the decrease of DNA replication, in growth arrested cells, protects cell from UV-C-induced apoptosis, even in the presence of DNA lesions.
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Affiliation(s)
- Renata M A da Costa
- Department of Microbiology, Institute of Biomedical Sciences, Universidade de São Paulo, Av. Prof. Lineu Prestes 1374, 05508-900 São Paulo, Brazil
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Yim EK, Lee KH, Myeong J, Tong SY, Um SJ, Park JS. Novel interaction between HPV E6 and BARD1 (BRCA1-associated ring domain 1) and its biologic roles. DNA Cell Biol 2008; 26:753-61. [PMID: 17678435 DOI: 10.1089/dna.2007.0588] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Human papillomaviruses (HPVs), which are associated with the majority of cervical cancers, encode a transforming protein, E6, which interacts with the p53 tumor suppressor protein. There is a wide effort focused on searching for the target of the involvement of p53-independent HPV 16 E6-interacting proteins. We identified Breast Cancer 1 Gene (BRCA1)-associated ring domain protein 1 (BARD1) as a binding partner of E6 and investigated its biological function in cervical cancer cells. In vivo co-immunoprecipitation assay was performed to determine whether E6-BARD1 interaction occurred. We then used a degradation assay to determine whether E6-mediated inactivation of BARD1 transactivation function was associated with BARD1 degradation. A mutation assay revealed the site of interaction of E6 with BARD1. The effect of BARD1 on p53 transcriptional activity was tested using BARD1 knockdown and overexpression systems. BARD1 was not degraded by E6, and, instead, formed a physical complex with E6. Moreover, the mutations of the metal motif zinc-finger region decreased the ability of E6 to interact with BARD1. Transient transfection of BARD1 increased the p53-mediated activation of p21(WAF1) promoter despite the presence of E6. Additionally, the existence of BARD1 inactivated the expression of E6 in cervical cancer cells. These findings suggest that BARD1 may regulate the transcriptional activities of p53 as tumor suppressors.
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Affiliation(s)
- Eun-Kyoung Yim
- Department of Obstetrics and Gynecology, The Catholic University of Korea, Seoul, Republic of Korea
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Abstract
Ca(2+) influx evoked across the plasma membrane upon internal store depletion is essential for a myriad of cellular functions including gene expression, cell proliferation, differentiation and even apoptosis. Darier's disease (DD), an autosomal dominant inherited disorder of the skin, arising due to mutations in the isoform 2 of the sarco (endo) plasmic reticulum Ca(2+) ATPase (SERCA2), exemplifies an anomaly of Ca(2+) signaling disturbances. Owing to loss of function mutations in SERCA2, keratinocytes in DD patients have a reduced pool of endoplasmic reticulum (ER) Ca(2+). Importantly, the status of ER Ca(2+) is critical for the activation of a class of plasma membrane Ca(2+) channels referred to as store operated Ca(2+) channels (SOCs). The widely expressed transient receptor potential (TRP) family of channels is proposed to be SOCs. In this review we discuss DD from the viewpoint of Ca(2+) signaling and present a potential role for TRPC1 in the disease pathogenesis.
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Affiliation(s)
- B. Pani
- Department of Biochemistry and Molecular Biology, School of Medicine & Health Sciences, University of North Dakota, Grand Forks, North Dakota 58202 USA
| | - B. B. Singh
- Department of Biochemistry and Molecular Biology, School of Medicine & Health Sciences, University of North Dakota, Grand Forks, North Dakota 58202 USA
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Caffeine inhibits UV-mediated NF-κB activation in A2058 melanoma cells: an ATM-PKCδ-p38 MAPK-dependent mechanism. Mol Cell Biochem 2007; 308:193-200. [DOI: 10.1007/s11010-007-9628-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2007] [Accepted: 10/03/2007] [Indexed: 10/22/2022]
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36
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Hellweg CE, Baumstark-Khan C. Detection of UV-induced activation of NF-kappaB in a recombinant human cell line by means of Enhanced Green Fluorescent Protein (EGFP). RADIATION AND ENVIRONMENTAL BIOPHYSICS 2007; 46:269-79. [PMID: 17429671 DOI: 10.1007/s00411-007-0104-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2006] [Accepted: 02/27/2007] [Indexed: 05/14/2023]
Abstract
The cellular protection reaction known as ultraviolet (UV) response leads to increased transcription of several genes. Parts of this transcriptional response are transmitted via activation of the Nuclear factor kappaB (NF-kappaB). The contribution of different UV radiation qualities to this process is not yet known. In a previous work, a stably transfected human cell line was developed which indicates activation of the NF-kappaB pathway by fluorescence of the reporters Enhanced Green Fluorescent Protein (EGFP) and its destabilized variant (d2EGFP) thereby allowing a fast and reliable monitoring of UV effects on the NF-kappaB pathway. Cells were exposed to a mercury low-pressure lamp or to simulated sunlight of different wavelength ranges and subjected to flow cytometric analysis after different post-irradiation periods. Growth capacity of cells after UV irradiation was quantified using a luminance measurement of crystal violet stained cell layers. In contrast to UVC and UVB, UVA radiation induced d2EGFP expression and NF-kappaB activation in a non-cytotoxic dose range. These results show that NF-kappaB plays a role in the UVA-induced gene activation in a non-cytotoxic dose range in a human epithelial cell line.
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Affiliation(s)
- Christine E Hellweg
- Radiation Biology, Institute of Aerospace Medicine, DLR, Linder Höhe, 51147, Köln, Germany.
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Büchau AS, Hassan M, Kukova G, Lewerenz V, Kellermann S, Würthner JU, Wolf R, Walz M, Gallo RL, Ruzicka T. S100A15, an antimicrobial protein of the skin: regulation by E. coli through Toll-like receptor 4. J Invest Dermatol 2007; 127:2596-604. [PMID: 17625598 DOI: 10.1038/sj.jid.5700946] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
E. coli is a gram-negative bacterium rarely found on human skin. We investigated whether direct interaction of E. coli with keratinocytes might induce an innate immune response through recognition by pattern recognition receptors. The capacity of E. coli to activate innate immune responses and IL-8 induction was investigated. We found that E. coli significantly induced human S100A7 and S100A15 transcript abundance and IL-8 release in cultured primary human keratinocytes. S100A15 is a member of the S100 protein family with previously unknown function. E. coli induced effects could be inhibited by neutralizing Toll-like receptor 4 (TLR4) antibodies, suggesting that E. coli-induced IL-8 and S100A15 expression in human keratinocytes are TLR4 dependent. TLR4-/- mice lacked elevated mS100A15 expression after infection with E. coli in contrast to wild-type mice. In vitro, human S100A15 displayed antimicrobial activity against E. coli. Our findings suggest that E. coli modulates S100A15 and IL-8 expression of keratinocytes by recognition through TLR4.
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Affiliation(s)
- Amanda S Büchau
- Department of Dermatology, Heinrich-Heine-University, Duesseldorf, Germany.
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Wu ZH, Miyamoto S. Many faces of NF-kappaB signaling induced by genotoxic stress. J Mol Med (Berl) 2007; 85:1187-202. [PMID: 17607554 DOI: 10.1007/s00109-007-0227-9] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2007] [Revised: 04/20/2007] [Accepted: 05/22/2007] [Indexed: 12/22/2022]
Abstract
The nuclear factor-kappaB (NF-kappaB) family of dimeric transcription factors plays pivotal roles in physiologic and pathologic processes, including immune and inflammatory responses and development and progression of various human cancers. Inactive NF-kappaB dimers normally exist in the cytoplasm in association with inhibitor proteins belonging to the inhibitor of NF-kappaB (IkappaB) family of related proteins. Activation of NF-kappaB involves its release from IkappaB and subsequent nuclear translocation to induce expression of target genes. Intense research effort has revealed many distinct signaling pathways and mechanisms of NF-kappaB activation induced by immune and inflammatory stimuli. These aspects of NF-kappaB biology have been amply reviewed in the literature. However, those that involve DNA-damaging agents are less well understood, and multiple conflicting pathways and mechanisms have been described in the literature. In this review, we summarize the proposed mechanisms of NF-kappaB activation by various DNA-damaging agents, discuss the significance of such activation in the context of cancer treatment, and highlight some of the critical questions that remain to be addressed in future studies.
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Affiliation(s)
- Zhao-Hui Wu
- Department of Pharmacology, University of Wisconsin-Madison, WI 53706, USA
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Curry CL, Reed LL, Broude E, Golde TE, Miele L, Foreman KE. Notch inhibition in Kaposi's sarcoma tumor cells leads to mitotic catastrophe through nuclear factor-κB signaling. Mol Cancer Ther 2007; 6:1983-92. [PMID: 17604336 DOI: 10.1158/1535-7163.mct-07-0093] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Kaposi's sarcoma (KS) is the most common neoplasm in untreated AIDS patients and accounts for significant morbidity and mortality worldwide. We have recently reported that Notch signaling (which plays an important role in cell proliferation, apoptosis, and oncogenesis) is constitutively activated in KS tumor cells. Blockade of this activity using γ-secretase inhibitors resulted in apoptosis of SLK cells, a KS tumor cell line; however, this apoptosis was preceded by a prolonged G2-M cell cycle arrest. This result led us to hypothesize that the cells were undergoing mitotic catastrophe, an abnormal mitosis that leads to eventual cell death. Here, we show that Notch inhibition in KS tumor cells using γ-secretase inhibitors or Notch-1 small interfering RNA resulted in G2-M cell cycle arrest and mitotic catastrophe characterized by the presence of micronucleated cells and an increased mitotic index. Interestingly, Notch inhibition led to a sustained increase in nuclear cyclin B1, a novel observation suggesting that Notch signaling can modulate expression of this critical cell cycle protein. Further analysis showed the induction of cyclin B1 was due, at least in part, to increased nuclear factor-κB (NF-κB) activity, which was also required for the G2-M growth arrest after Notch inhibition. Taken together, these studies suggest that Notch inhibition can initiate aberrant mitosis by inducing NF-κB activity that inappropriately increases cyclin B1 resulting in cell death via mitotic catastrophe. [Mol Cancer Ther 2007;6(7):1983–92]
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Affiliation(s)
- Christine L Curry
- Department of Pathology, Cardinal Bernardin Cancer Center, Loyola University Chicago, 2160 South First Avenue, Maywood, IL 60153, USA
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Lan CCE, Lin CL, Wu CS, Chai CY, Chen WT, Chen GS. Treatment of idiopathic prurigo nodularis in Taiwanese patients with low-dose thalidomide. J Dermatol 2007; 34:237-42. [PMID: 17352720 DOI: 10.1111/j.1346-8138.2007.00260.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Prurigo nodularis is an intensely pruritic dermatosis characterized by lichenified and excoriated papules and nodules. The course of prurigo nodularis is often chronic, and some patients respond very poorly to the standard therapeutic modalities. Because the pathogenesis of this disease remains obscure, the treatment of prurigo nodularis can be disappointing and frustrating for both the patients and physicians. Thalidomide, a tumor necrosis factor-alpha antagonist, has been suggested as an alternative treatment option for recalcitrant prurigo nodularis. In the past, the regimen for treatment of prurigo nodularis often required thalidomide at 200 mg/day. We recruited patients with intractable prurigo nodularis and treated them with low-dose thalidomide. Six patients with idiopathic prurigo nodularis were successfully treated with low-dose thalidomide (50-100 mg/day) without clinical development of peripheral neuropathy. In summary, our preliminary results suggest that low-dose thalidomide may be a safe and effective treatment option for patients with recalcitrant idiopathic prurigo nodularis.
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Affiliation(s)
- Cheng-Che E Lan
- Department of Dermatology, Graduate Institute of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
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41
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Garcin G, Douki T, Stoebner PE, Guesnet J, Guezennec A, Martinez J, Cadet J, Meunier L. Cell surface expression of melanocortin-1 receptor on HaCaT keratinocytes and alpha-melanocortin stimulation do not affect the formation and repair of UVB-induced DNA photoproducts. Photochem Photobiol Sci 2007; 6:585-93. [PMID: 17487313 DOI: 10.1039/b615656h] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ultraviolet (UV) exposure induces an up-regulation of melanocortin-1 receptor (MC1R) expression in human skin and the alpha-melanocyte-stimulating hormone (alpha-MSH) may reduce UVB-induced DNA damage in normal human melanocytes. Using high-performance liquid chromatography coupled to tandem mass spectrometry, we investigated the formation and repair of DNA lesions in UVB-irradiated HaCaT cells stably transfected with the wild type MC1R gene (HaCaT-MC1R). Similar levels of 8 bipyrimidine photoproducts including cyclobutane pyrimidine dimers (CPDs) (T<>T, T<>C, C<>T), (6-4) photoproducts ((6-4)PPs) (TT-(6-4)PPs, TC-(6-4)PPs) and their Dewar valence isomers together with 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodGuo) were found to be generated in both non-transfected and HaCaT-MC1R cells after UVB exposure. Time-course studies of DNA photoproduct yields indicated that the DNA repair ability depended upon radiation doses. It was shown that (6-4)PPs were removed from the DNA of UVB-irradiated cells much more efficiently than CPDs. The repair efficiency of 8-oxodGuo, CPDs and (6-4)PPs was relatively similar in both cell lines and was not modified by stimulation with alpha-MSH before UVB-exposure. In conclusion, cell surface-enforced expression of MC1Rs on HaCaT keratinocytes and alpha-MSH stimulation do not affect the formation of UVB-induced DNA photoproducts and their subsequent repair.
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Affiliation(s)
- Geneviève Garcin
- UMR CNRS 5247 (IBMM), Université Montpellier I - Faculté de Pharmacie, 15 Av. Charles Flahault BP 14 491, 34093, Montpellier Cedex 5, and Department of Dermatology, Groupe Hospitalo-Universitaire Caremeau, Nimes, France
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Abstract
Psoriasis is a chronic immune-mediated inflammatory skin disease characterised by abnormal keratinocyte differentiation and proliferation. The immunopathogenesis is complex and novel evidence shows the involvement of both innate and adaptive immune response. Type 1 T cells and their effector cytokines play a pivotal role. Several drugs under preclinical and clinical development for psoriasis are directed against the immune response, targeting activation or proliferation of T cells, their trafficking and skin-homing, or effector cytokines. Among these, great attention has been given to TNF-alpha, following the demonstration of effectiveness of anti-TNF-alpha biologicals, and to IFN-gamma inducers. Another appealing approach concerns drugs capable of inducing immunological tolerance. Progress made in the recognition of intracellular events has prompted the development of small molecules and oligonucleotides that can inhibit specific molecular targets. There is, however, a plethora of other emerging drugs, clearly suggestive of the current interest for psoriasis, which are briefly described in this paper.
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Affiliation(s)
- Gino A Vena
- 2nd Dermatology Clinic, University of Bari, Bari, Italy.
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43
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Adams S, Pankow S, Werner S, Munz B. Regulation of NF-kappaB activity and keratinocyte differentiation by the RIP4 protein: implications for cutaneous wound repair. J Invest Dermatol 2006; 127:538-44. [PMID: 17039240 DOI: 10.1038/sj.jid.5700588] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Receptor-interacting proteins (RIPs) are important regulators of cell proliferation and differentiation. As RIP4 is a crucial modulator of epidermal differentiation, we analyzed the expression of different rip genes in healing skin wounds. Rip4 expression was strongly downregulated in keratinocytes of the hyperproliferative epithelium at the wound edge early after injury and only returned to basal levels after completion of wound repair. Rip3 expression was strongly induced as early as 1 day after wounding. In contrast, rip and rip2 expression remained unaltered. To determine the factors that regulate rip4 gene expression in keratinocytes, human HaCaT keratinocytes were used as a model system. We found that scratch wounding as well as treatment with whole serum, phorbol esters, the growth/differentiation factors epidermal growth factor, transforming growth factor-beta, and activin A, or the proinflammatory cytokines tumor necrosis factor-alpha and IL-1beta strongly suppressed rip4 expression in these cells. In contrast, the steroid dexamethasone and all-trans retinoic acid slightly stimulated rip4 expression. Suppression of rip4 expression in keratinocytes using small interfering RNA technology reduced the activation of NF-kappaB, and enhanced the expression of epidermal differentiation markers in these cells. These data suggest important and unique functions of different RIP proteins in keratinocytes of normal and wounded skin.
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Affiliation(s)
- Stephanie Adams
- Institute of Physiology, Charité-University Medicine Berlin, Berlin, Germany
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44
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Handa O, Kokura S, Adachi S, Takagi T, Naito Y, Tanigawa T, Yoshida N, Yoshikawa T. Methylparaben potentiates UV-induced damage of skin keratinocytes. Toxicology 2006; 227:62-72. [PMID: 16938376 DOI: 10.1016/j.tox.2006.07.018] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2006] [Revised: 07/11/2006] [Accepted: 07/12/2006] [Indexed: 11/16/2022]
Abstract
For many years, methylparaben (MP) has been used as a preservative in cosmetics. In this study, we investigated the effects of ultraviolet-B (UVB) exposure on MP-treated human skin keratinocytes. HaCaT keratinocyte was cultured in MP-containing medium for 24h, exposed to UVB (15 or 30 mJ/cm(2)) and further cultured for another 24h. Subsequent cellular viability was quantified by MTT-based assay and cell death was qualified by fluorescent microscopy and flow cytometry. Oxidative stress, nitric oxide (NO) production and cellular lipid peroxidation were measured using fluorescent probes. In addition, activation of nuclear factor kappa B and activator protein-1 was assessed by electro-mobility gel-shift assay. Practical concentrations of MP (0.003%) had a little or no effect on cellular viability, oxidative stress, NO production, lipid peroxidation and activation of nuclear transcription factors in HaCaT keratinocytes. Low-dose UVB also had little or no effect on these parameters in HaCaT keratinocytes. However, UVB exposure significantly increased cell death, oxidative stress, NO production, lipid peroxidation and activation of transcription factors in MP-treated HaCaT keratinocytes. These results indicate that MP, which has been considered a safe preservative in cosmetics, may have harmful effects on human skin when exposed to sunlight.
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Affiliation(s)
- Osamu Handa
- Department of Biomedical Safety Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan
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45
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Liang MH, Chuang DM. Differential roles of glycogen synthase kinase-3 isoforms in the regulation of transcriptional activation. J Biol Chem 2006; 281:30479-84. [PMID: 16912034 DOI: 10.1074/jbc.m607468200] [Citation(s) in RCA: 100] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Glycogen synthase kinase-3 (GSK-3) exists as two structurally similar isoforms, alpha and beta, whose activities are negatively regulated by serine phosphorylation but positively controlled by tyrosine phosphorylation. We used GSK-3 isoform-specific small interfering RNAs, dominant negative mutants, and pharmacological inhibitors to search for the differential roles for both GSK-3 isoforms in regulating transcriptional activation in cultured rat cerebral cortical neurons. GSK-3alpha and GSK-3beta were shown to have differentially regulated transactivation such that GSK-3alpha silencing/inhibition was more robust than GSK-3beta silencing/inhibition in causing cAMP-responsive element- and NF-kappaB-dependent transactivation. Moreover, protein-DNA array studies identified two novel GSK-3-regulated transcription factors, early growth response 1 and Smad3/4, which were oppositely affected by GSK-3alpha or GSK-3beta silencing or inhibition. Taken together, our results underscore critical variations in the function and regulation of GSK-3alpha and GSK-3beta. The development of GSK-3 isoform-specific inhibitors is thus crucial for therapeutic intervention of GSK-3-related neuropathological conditions.
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Affiliation(s)
- Min-Huei Liang
- Molecular Neurobiology Section, National Institute of Mental Health, Bethesda, Maryland 20892-1363, USA
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46
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Pani B, Cornatzer E, Cornatzer W, Shin DM, Pittelkow MR, Hovnanian A, Ambudkar IS, Singh BB. Up-regulation of transient receptor potential canonical 1 (TRPC1) following sarco(endo)plasmic reticulum Ca2+ ATPase 2 gene silencing promotes cell survival: a potential role for TRPC1 in Darier's disease. Mol Biol Cell 2006; 17:4446-58. [PMID: 16899508 PMCID: PMC1635355 DOI: 10.1091/mbc.e06-03-0251] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
The mechanism(s) involved in regulation of store operated calcium entry in Darier's disease (DD) is not known. We investigated the distribution and function of transient receptor potential canonical (TRPC) in epidermal skin cells. DD patients demonstrated up-regulation of TRPC1, but not TRPC3, in the squamous layers. Ca2+ influx was significantly higher in keratinocytes obtained from DD patients and showed enhanced proliferation compared with normal keratinocytes. Similar up-regulation of TRPC1 was also detected in epidermal layers of SERCA2+/- mice. HaCaT cells expressed TRPC1 in the plasma membrane. Expression of sarco(endo)plasmic reticulum Ca2+ ATPase (SERCA)2 small interfering RNA (siRNA) in HaCaT cells increased TRPC1 levels and thapsigargin-stimulated Ca2+ influx, which was blocked by store-operated calcium entry inhibitors. Thapsigargin-stimulated intracellular Ca2+ release was decreased in DD cells. DD keratinocytes exhibited increased cell survival upon thapsigargin treatment. Alternatively, overexpression of TRPC1 or SERCA2-siRNA in HaCaT cells demonstrated resistance to thapsigargin-induced apoptosis. These effects were dependent on external Ca2+ and activation of nuclear factor-kappaB. Isotretinoin reduced Ca2+ entry in HaCaT cells and decreased survival of HaCaT and DD keratinocytes. These findings put forward a novel consequence of compromised SERCA2 function in DD wherein up-regulation of TRPC1 augments cell proliferation and restrict apoptosis. We suggest that the anti-apoptotic effect of TRPC1 could potentially contribute to abnormal keratosis in DD.
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Affiliation(s)
| | | | - William Cornatzer
- Internal Medicine, School of Medicine and Health Sciences, University of North Dakota, Grand Forks, ND 58202
| | - Dong-Min Shin
- Department of Oral Biology, Korea 21 Project for Medical Science, Yonsei University College of Dentistry, Seoul 120-752, Korea
| | - Mark R. Pittelkow
- Department of Dermatology, Mayo Clinic College of Medicine, Rochester, MN 55905
| | - Alain Hovnanian
- Department of Functional Genetics of Epithelial Diseases, Institut National de la Santé et de la Recherche Médicale U563, 31024 Toulouse Cedex 3, France; and
| | - Indu S. Ambudkar
- Secretory Physiology Section, Gene Therapy and Therapeutics Branch, National Institute of Dental and Craniofacial Research, National Institutes of Health, Bethesda, MD 20892
| | - Brij B. Singh
- Departments of *Biochemistry and Molecular Biology and
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Lewis DA, Hengeltraub SF, Gao FC, Leivant MA, Spandau DF. Aberrant NF-κB Activity in HaCaT Cells Alters their Response to UVB Signaling. J Invest Dermatol 2006; 126:1885-92. [PMID: 16741515 DOI: 10.1038/sj.jid.5700333] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The immortalized keratinocyte cell line called HaCaT has been used in experiments as a convenient substitute for cultured normal human keratinocytes. However, some molecular differences have been identified that distinguish HaCaT cells from normal human keratinocytes, including differences in the NF-kappaB signaling pathway and in their response to UVB irradiation. NF-kappaB is a widely expressed transcription factor that is activated by a cacophony of stimuli, including inflammatory mediators such as TNFalpha and oxidative stressors such as UVB exposure. This report delineates and further elucidates the aberrant NF-kappaB signaling pathway and its effect in HaCaT cells exposed to UVB radiation or inflammatory mediators. We demonstrate that NF-kappaB DNA binding is activated by both UVB and TNFalpha, but discrepancies in the activation of key upstream signaling pathway components such as AKT phosphorylation and IkappaBalpha degradation exist. Disruption of the constitutive NF-kappaB activity in HaCaT cells resulted in alterations in NF-kappaB signaling that were more consistent with the NF-kappaB signaling pathway in normal human keratinocytes. These studies suggest that caution should be used in extrapolating the biological responses of HaCaT cells to those of normal human keratinocytes in the absence of confirmatory experiments.
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Affiliation(s)
- Davina A Lewis
- Department of Dermatology, Indiana University School of Medicine, Indianapolis, Indiana, USA
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Albor A, El-Hizawi S, Horn EJ, Laederich M, Frosk P, Wrogemann K, Kulesz-Martin M. The interaction of Piasy with Trim32, an E3-ubiquitin ligase mutated in limb-girdle muscular dystrophy type 2H, promotes Piasy degradation and regulates UVB-induced keratinocyte apoptosis through NFkappaB. J Biol Chem 2006; 281:25850-66. [PMID: 16816390 DOI: 10.1074/jbc.m601655200] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Protein inhibitors of activated STATs (PIAS) family members are ubiquitin-protein isopeptide ligase-small ubiquitin-like modifier ligases for diverse transcription factors. However, the regulation of PIAS protein activity in cells is poorly understood. Previously, we reported that expression of Trim32, a RING domain ubiquitin-protein isopeptide ligase-ubiquitin ligase mutated in human limb-girdle muscular dystrophy type 2H (LGMD2H) and Bardet-Biedl syndrome, is elevated during mouse skin carcinogenesis, protecting keratinocytes from apoptosis induced by UVB and tumor necrosis factor-alpha (TNFalpha). Here we report that Trim32 interacts with Piasy and promotes Piasy ubiquitination and degradation. Ubiquitination of Piasy by Trim32 could be reproduced in vitro using purified components. Their interaction was induced by treatment with UVB/TNFalpha and involved redistribution of Piasy from the nucleus to the cytoplasm, where it accumulated in cytoplasmic granules that colocalized with Trim32. Piasy destabilization and ubiquitination required an intact RING domain in Trim32. The LGMD2H-associated missense point mutation prevented Trim32 binding to Piasy, and human Piasy failed to colocalize with human Trim32 in fibroblasts isolated from an LGMD2H patient. Trim32 expression increased the transcriptional activity of NFkappaB in epidermal keratinocytes, both under basal treatment and after UVB/TNFalpha treatment. Conversely, Piasy inhibited NFkappaB activity under the same conditions and sensitized keratinocytes to apoptosis induced by TNFalpha and UVB. Our results indicate that, by controlling Piasy stability, Trim32 regulates UVB-induced keratinocyte apoptosis through induction of NFkappaB and suggests loss of function of Trim32 in LGMD2H.
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Affiliation(s)
- Amador Albor
- Department of Dermatology and Program in Cell and Molecular Biology, Oregon Health and Science University, Portland, Oregon 97239, USA.
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49
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Laguna C, Martín B, Torrijos A, García-Melgares ML, Febrer I. Síndrome de Stevens-Johnson y necrólisis epidérmica tóxica: experiencia clínica y revisión de la literatura especializada. ACTAS DERMO-SIFILIOGRAFICAS 2006; 97:177-85. [PMID: 16796964 DOI: 10.1016/s0001-7310(06)73376-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
INTRODUCTION The aim of this work is to reflect the clinical experience of the Dermatology Department of Hospital General in Valencia with Stevens-Johnson syndrome (SJS) and toxic epidermal necrolysis (TEN) or Lyell's syndrome over the last 15 years. METHODS Data on epidemiology, likely causal agents, complementary tests, concomitant pathologies, management, evolution and complications was gathered through a retrospective study. RESULTS Thirteen patients were included, with a mean age of 53 years. The most frequently involved drugs were antibiotics (50 %), followed by anti-convulsants (16.6 %). The mucous membranes were involved in 84.6 % of the cases. 61.5 % of the patients presented with systemic symptoms. The most frequent laboratory finding was hypoproteinemia. Corticosteroids were used in 69 % of the cases, and intravenous immunoglobulins in 15 %. Two oncological patients with a diagnosis of TEN died (15 % overall mortality). CONCLUSIONS SJS and TEN are infrequent mucocutaneous reactions, often drug induced, with significant associated morbidity and mortality. Their pathogenesis is still partially unknown, and no specific treatment has been proven to be clearly beneficial; therefore, the best treatment consists of early diagnosis, the withdrawal of the suspect drug and support therapy.
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Affiliation(s)
- Cecilia Laguna
- Servicio de Dermatología, Hospital General Universitario de Valencia, España.
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50
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Yokoyama S, Nakano H, Yamazaki T, Tamai K, Hanada K, Takahashi G. Enhancement of ultraviolet-induced apoptosis by NF-kappaB decoy oligonucleotides. Br J Dermatol 2006; 153 Suppl 2:47-51. [PMID: 16280021 DOI: 10.1111/j.1365-2133.2005.06969.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND A decoy strategy utilizing oligonucleotides (ODN) containing the specific binding sequence of a certain transcription factor has been developed and is considered to be a potential new class of antigene therapy. However, the application of this new therapeutic modality to skin diseases has not been fully documented. OBJECTIVES The aim of this work was to examine the effects of the nuclear factor (NF)-kappaB decoy ODN on UV-elicited skin change. METHODS Mouse keratinocyte Pam 212 cells were transfected with NF-kappaB decoy ODN to examine the effects of the decoy ODN on ultraviolet (UV) B-induced apoptosis. Tape-stripped rat dorsal skin was treated with an ointment containing NF-kappaB decoy ODN for the examination of the in vivo impact of the decoy ODN on sunburned cell (SBC) formation and UVB erythema. RESULTS NF-kappaB decoy ODN specifically induced apoptosis of Pam 212 cells and SBC formation was significantly enhanced by topical NF-kappaB decoy ODN ointment, while UV-induced erythema was not affected. CONCLUSIONS These data suggest that enhancement of UV-induced apoptosis by NF-kappaB decoy ODN may play a cancer-preventive role by further eliminating photodamaged keratinocytes.
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Affiliation(s)
- S Yokoyama
- Department of Dermatology, Hirosaki University School of Medicine, 5 Zaifu-cho, Hirosaki 036-8562, Japan
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