1
|
Fu R, Jiang X, Yang Y, Wang C, Zhang Y, Zhu Y, Zhang H. Bidirectional regulation of structural damage on autophagy in the C. elegans epidermis. Autophagy 2022; 18:2731-2745. [PMID: 35311461 PMCID: PMC9629849 DOI: 10.1080/15548627.2022.2047345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 02/21/2022] [Accepted: 02/23/2022] [Indexed: 12/15/2022] Open
Abstract
A variety of disturbances such as starvation, organelle damage, heat stress, hypoxia and pathogen infection can influence the autophagic process. However, how the macroautophagy/autophagy machinery is regulated intrinsically by structural damage of the cell remains largely unknown. In this work, we utilized the C. elegans epidermis as the model to address this question. Our results showed that structural damage by mechanical wounding exerted proximal inhibitory effect and distant promotional effect on autophagy within the same epidermal cell. By disrupting individual mechanical supporting structures, we found that only damage of the basal extracellular matrix or the underlying muscle cells activated a distinct autophagic response in the epidermis. On the contrary, structural disruption of the epidermal cells at the apical side inhibited autophagy activation caused by different stress factors. Mechanistic studies showed that the basal promotional effect of structural damage on epidermal autophagy was mediated by a mechanotransduction pathway going through the basal hemidesmosome receptor and LET-363/MTOR, while the apical inhibitory effect was mostly carried out by activation of calcium signaling. Elevated autophagy in the epidermis played a detrimental rather than a beneficial role on cell survival against structural damage. The results obtained from these studies will not only help us better understand the pathogenesis of structural damage- and autophagy-related diseases, but also provide insight into more generic rules of autophagy regulation by the structural and mechanical properties of cells across species.Abbreviations : ATG: autophagy related; BLI-1: BLIstered cuticle 1; CeHDs: C. elegans hemidesmosomes; COL-19: COLlagen 19; DPY-7: DumPY 7; ECM: extracellular matrix; EPG-5: ectopic PGL granules 5; GFP: green fluorescent protein; GIT-1: GIT1 (mammalian G protein-coupled receptor kinase InTeractor 1) homolog; GTL-2: Gon-Two Like 2 (TRP subfamily); HIS-58, HIStone 58; IFB-1: Intermediate Filament, B 1; LET: LEThal; LGG-1: LC3, GABARAP and GATE-16 family 1; MTOR: mechanistic target of rapamycin; MTORC1: MTOR complex 1; MUP-4: MUscle Positioning 4; NLP-29: Neuropeptide-Like Protein 29; PAT: Paralyzed Arrest at Two-fold; PIX-1: PIX (PAK (p21-activated kinase) Interacting eXchange factor) homolog 1; RFP: red fluorescent protein; RNAi: RNA interference; SQST-1: SeQueSTosome related 1; UNC: UNCoordinated; UV: ultraviolet; VAB-10: variable ABnormal morphology 10; WT: wild type.
Collapse
Affiliation(s)
- Rong Fu
- Jiangsu Key Laboratory of Infection and Immunity, Institute of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Xiaowan Jiang
- Jiangsu Key Laboratory of Infection and Immunity, Institute of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Yuyan Yang
- Jiangsu Key Laboratory of Infection and Immunity, Institute of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Chunxia Wang
- Jiangsu Key Laboratory of Infection and Immunity, Institute of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Yun Zhang
- Jiangsu Key Laboratory of Infection and Immunity, Institute of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Yi Zhu
- Jiangsu Key Laboratory of Infection and Immunity, Institute of Biology and Medical Sciences, Soochow University, Suzhou, China
| | - Huimin Zhang
- Jiangsu Key Laboratory of Infection and Immunity, Institute of Biology and Medical Sciences, Soochow University, Suzhou, China
| |
Collapse
|
2
|
Meng-zhen S, Ju L, Lan-chun Z, Cai-feng D, Shu-da Y, Hao-fei Y, Wei-yan H. Potential therapeutic use of plant flavonoids in AD and PD. Heliyon 2022; 8:e11440. [DOI: 10.1016/j.heliyon.2022.e11440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 10/16/2022] [Accepted: 10/31/2022] [Indexed: 11/09/2022] Open
|
3
|
Liu WW, Wang F, Li C, Song XY, Otkur W, Zhu YY, Hayashi T, Mizuno K, Hattori S, Fujisaki H, Ikejima T. Silibinin relieves UVB-induced apoptosis of human skin cells by inhibiting the YAP-p73 pathway. Acta Pharmacol Sin 2022; 43:2156-2167. [PMID: 34912007 PMCID: PMC9343358 DOI: 10.1038/s41401-021-00826-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Accepted: 11/16/2021] [Indexed: 02/07/2023] Open
Abstract
Excessive exposure to UVB induces skin diseases. Silibinin, a flavonolignan used for treating liver diseases, is found to be effective against UVB-caused skin epidermal and dermal cell damage. In this study we investigated the molecular mechanisms underlying. Human nonmalignant immortalized keratinocyte HaCaT cells and neonatal human foreskin fibroblasts HFFs were exposed to UVB irradiation. We showed that pre-treatment with silibinin dose-dependently decreased UVB-induced apoptosis of HaCaT cells. Furthermore, we showed that silibinin treatment inhibited nuclear translocation of YAP after UVB irradiation. Molecular docking analysis and DARTS assay confirmed the direct interaction of silibinin with YAP. Silencing YAP by siRNA had no influence on the survival of HaCaT cells, whereas inhibiting classical YAP-TEAD signaling pathway by siRNA targeting TEAD1 or its pharmaceutical inhibitor verteporfin further augmented UVB-induced apoptosis, suggesting that YAP-TEAD pathway was prosurvival, which did not participate in the protective effect of silibinin. We then explored the pro-apoptotic YAP-p73 pathway. p73 was upregulated in UVB-irradiated cells, but reduced by silibinin cotreatment. The mRNA and protein levels of p73 target genes (PML, p21 and Bax) were all increased by UVB but decreased by silibinin co-treatment. Inhibiting p73 by using siRNA reduced UVB-induced apoptosis, suggesting that downregulation of p73 was responsible for the cytoprotective effect of silibinin. In HFFs, the upregulated YAP-p73 pathway by UVB irradiation was also suppressed by silibinin. Collectively, YAP-p73 pathway is a major cause of the death of UVB-exposed epidermal HaCaT cells and dermal HFFs. Silibinin directly inhibits YAP-p73 pathway, exerting the protective action on UVB-irradiated skin cells.
Collapse
Affiliation(s)
- Wei-wei Liu
- grid.412561.50000 0000 8645 4345Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016 China
| | - Fang Wang
- grid.412561.50000 0000 8645 4345Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016 China
| | - Can Li
- grid.412561.50000 0000 8645 4345Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016 China
| | - Xiao-yu Song
- grid.412561.50000 0000 8645 4345Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016 China
| | - Wuxiyar Otkur
- grid.412561.50000 0000 8645 4345Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016 China ,grid.423905.90000 0004 1793 300XCAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023 China
| | - Yu-ying Zhu
- grid.412561.50000 0000 8645 4345Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016 China
| | - Toshihiko Hayashi
- grid.412561.50000 0000 8645 4345Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016 China ,grid.411110.40000 0004 1793 1012Department of Chemistry and Life science, School of Advanced Engineering, Kogakuin University, 2665-1, Nakanomachi, Hachioji, Tokyo 192-0015 Japan ,Nippi Research Institute of Biomatrix, Toride, Ibaraki, 302-0017 Japan
| | - Kazunori Mizuno
- Nippi Research Institute of Biomatrix, Toride, Ibaraki, 302-0017 Japan
| | - Shunji Hattori
- Nippi Research Institute of Biomatrix, Toride, Ibaraki, 302-0017 Japan
| | - Hitomi Fujisaki
- Nippi Research Institute of Biomatrix, Toride, Ibaraki, 302-0017 Japan
| | - Takashi Ikejima
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, 110016, China. .,Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Shenyang, 110016, China.
| |
Collapse
|
4
|
UTO T, OHTA T, KATAYAMA K, SHOYAMA Y. Silibinin promotes melanogenesis through the PKA and p38 MAPK signaling pathways in melanoma cells. Biomed Res 2022; 43:31-39. [DOI: 10.2220/biomedres.43.31] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Takuhiro UTO
- Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Nagasaki International University
| | - Tomoe OHTA
- Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Nagasaki International University
| | - Koki KATAYAMA
- Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Nagasaki International University
| | - Yukihiro SHOYAMA
- Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Nagasaki International University
| |
Collapse
|
5
|
Liu W, Wang F, Li C, Otkur W, Hayashi T, Mizuno K, Hattori S, Fujisaki H, Onodera S, Ikejima T. Silibinin treatment protects human skin cells from UVB injury through upregulation of estrogen receptors. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2021; 216:112147. [PMID: 33561689 DOI: 10.1016/j.jphotobiol.2021.112147] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 11/27/2020] [Accepted: 01/28/2021] [Indexed: 02/07/2023]
Abstract
Ultraviolet B (UVB) from the sunlight is a major environmental cause for human skin damages, inducing cell death, inflammation, senescence and even carcinogenesis. The natural flavonoid silibinin, clinically used as liver protectant, has protective effects against UVB-caused skin injury in vivo and in vitro. Silibinin is often classified as a phytoestrogen, because it modulates the activation of estrogen receptors (ERs). However, whether silibinin's estrogenic effect contributes to the skin protection against UVB injury remains to be elucidated. The issue was explored in this study by using the human foreskin dermal fibroblasts (HFF) and human non-malignant immortalized keratinocytes (HaCaT). In HFF, pre-treatment with silibinin rescued UVB-irradiated cells from apoptosis. Interestingly, silibinin increased the whole cellular and nuclear levels of ERα and ERβ in UVB-irradiated cells. Activation of ERs by treatment with estradiol elevated the cell survival and reduced apoptosis in UVB-treated cells. ERα agonist increased cell survival, while its antagonist decreased it. ERβ agonist also increased cell survival, but the antagonist had no effect on cell survival. Transfection of the cells with the small interfering RNAs (si-RNAs) to ERα or ERβ diminished the protective effect of silibinin on UVB-irradiated cells. In UVB-treated HaCaT cells, both ERα and ERβ were increased by silibinin treatment. Inhibition of activation and expression of ERα or ERβ by specific antagonists and si-RNAs, respectively, reduced cell survival in UVB-treated HaCaT cells regardless of silibinin treatment. Taken together, it is summarized that silibinin up-regulates both ERα and ERβ pathways in UVB-treated dermal HFF cells and epidermal HaCaT cells, leading to protection of skin from UVB-damage.
Collapse
Affiliation(s)
- Weiwei Liu
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, Liaoning, China
| | - Fang Wang
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, Liaoning, China
| | - Can Li
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, Liaoning, China
| | - Wuxiyar Otkur
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, Liaoning, China; CAS Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, China
| | - Toshihiko Hayashi
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, Liaoning, China; Department of Chemistry and Life science, School of Advanced Engineering, Kogakuin University, 2665-1, Nakanomachi, Hachioji, Tokyo 192-0015, Japan; Nippi Research Institute of Biomatrix, Toride, Ibaraki 302-0017, Japan
| | - Kazunori Mizuno
- Nippi Research Institute of Biomatrix, Toride, Ibaraki 302-0017, Japan
| | - Shunji Hattori
- Nippi Research Institute of Biomatrix, Toride, Ibaraki 302-0017, Japan
| | - Hitomi Fujisaki
- Nippi Research Institute of Biomatrix, Toride, Ibaraki 302-0017, Japan
| | - Satoshi Onodera
- Medical Research Institute of Curing Mibyo, 1-6-28 Narusedai Mechida Tokyo, 194-0042, Japan
| | - Takashi Ikejima
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, Liaoning, China; Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Shenyang Pharmaceutical University, Shenyang 110016, Liaoning, China.
| |
Collapse
|
6
|
Prasad RR, Paudel S, Raina K, Agarwal R. Silibinin and non-melanoma skin cancers. J Tradit Complement Med 2020; 10:236-244. [PMID: 32670818 PMCID: PMC7340873 DOI: 10.1016/j.jtcme.2020.02.003] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Revised: 02/04/2020] [Accepted: 02/05/2020] [Indexed: 01/20/2023] Open
Abstract
Skin is the largest human organ that shields the inner body from contact with xenobiotic and genotoxic agents, and in this process, the skin's cellular genome faces continuous stress due to direct exposure to these noxious factors. Accumulation of genetic stress results in genomic alterations leading to undesirable gene or protein alteration/expression in skin cells, which eventually causes the formation of non-melanoma skin cancers (NMSCs). Ultraviolet B (UVB) radiation from sun is the most prominent factor contributing to ∼5 million skin cancer cases (which are mostly NMSCs) in the United States (US) and western countries. UVB exposure causes aberrations in a range of biochemical and molecular pathways such as: thymine dimer formation, DNA damage, oxidative stress, inflammatory responses, altered cellular signaling, which ultimately contribute to the development of NMSCs. The focus of this review is to summarize the protective and preventive potential of silymarin and/or silibinin against UVB-induced NMSC in pre-clinical skin cancer studies. Over two decades of research has shown the strong potential of silibinin, a biologically active flavonolignan (crude form Silymarin) derived from milk thistle plant, against a wide range of cancers, including NMSCs. Silibinin protects against UVB-induced thymine dimer formation and in turn promotes DNA repair and/or initiates apoptosis in damaged cells via an increase in p53 levels. Additionally, silibinin has shown strong efficacy against NMSCs via its potential to target aberrant signaling pathways, and induction of anti-inflammatory responses. Overall, completed comprehensive studies suggest the potential use of silibinin to prevent and/or manage NMSCs in humans.
Collapse
Affiliation(s)
- Ram Raj Prasad
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Denver-Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Sandeep Paudel
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Denver-Anschutz Medical Campus, Aurora, CO, 80045, USA
| | - Komal Raina
- Department of Pharmaceutical Sciences, South Dakota State University, Brookings, SD, 57007, USA
| | - Rajesh Agarwal
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of Colorado Denver-Anschutz Medical Campus, Aurora, CO, 80045, USA
- University of Colorado Comprehensive Cancer Center, University of Colorado Denver-Anschutz Medical Campus, Aurora, CO, 80045, USA
| |
Collapse
|
7
|
Giampieri F, Afrin S, Forbes-Hernandez TY, Gasparrini M, Cianciosi D, Reboredo-Rodriguez P, Varela-Lopez A, Quiles JL, Battino M. Autophagy in Human Health and Disease: Novel Therapeutic Opportunities. Antioxid Redox Signal 2019; 30:577-634. [PMID: 29943652 DOI: 10.1089/ars.2017.7234] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
SIGNIFICANCE In eukaryotes, autophagy represents a highly evolutionary conserved process, through which macromolecules and cytoplasmic material are degraded into lysosomes and recycled for biosynthetic or energetic purposes. Dysfunction of the autophagic process has been associated with the onset and development of many human chronic pathologies, such as cardiovascular, metabolic, and neurodegenerative diseases as well as cancer. Recent Advances: Currently, comprehensive research is being carried out to discover new therapeutic agents that are able to modulate the autophagic process in vivo. Recent evidence has shown that a large number of natural bioactive compounds are involved in the regulation of autophagy by modulating several transcriptional factors and signaling pathways. CRITICAL ISSUES Critical issues that deserve particular attention are the inadequate understanding of the complex role of autophagy in disease pathogenesis, the limited availability of therapeutic drugs, and the lack of clinical trials. In this context, the effects that natural bioactive compounds exert on autophagic modulation should be clearly highlighted, since they depend on the type and stage of the pathological conditions of diseases. FUTURE DIRECTIONS Research efforts should now focus on understanding the survival-supporting and death-promoting roles of autophagy, how natural compounds interact exactly with the autophagic targets so as to induce or inhibit autophagy and on the evaluation of their pharmacological effects in a more in-depth and mechanistic way. In addition, clinical studies on autophagy-inducing natural products are strongly encouraged, also to highlight some fundamental aspects, such as the dose, the duration, and the possible synergistic action of these compounds with conventional therapy.
Collapse
Affiliation(s)
- Francesca Giampieri
- 1 Dipartimento di Scienze Cliniche Specialistiche ed Odontostomatologiche-Sez. Biochimica , Facoltà di Medicina, Università Politecnica delle Marche , Ancona, Italy
| | - Sadia Afrin
- 1 Dipartimento di Scienze Cliniche Specialistiche ed Odontostomatologiche-Sez. Biochimica , Facoltà di Medicina, Università Politecnica delle Marche , Ancona, Italy
| | - Tamara Y Forbes-Hernandez
- 1 Dipartimento di Scienze Cliniche Specialistiche ed Odontostomatologiche-Sez. Biochimica , Facoltà di Medicina, Università Politecnica delle Marche , Ancona, Italy .,2 Area de Nutricion y Salud, Universidad Internacional Iberoamericana , Campeche, Mexico
| | - Massimiliano Gasparrini
- 1 Dipartimento di Scienze Cliniche Specialistiche ed Odontostomatologiche-Sez. Biochimica , Facoltà di Medicina, Università Politecnica delle Marche , Ancona, Italy
| | - Danila Cianciosi
- 1 Dipartimento di Scienze Cliniche Specialistiche ed Odontostomatologiche-Sez. Biochimica , Facoltà di Medicina, Università Politecnica delle Marche , Ancona, Italy
| | - Patricia Reboredo-Rodriguez
- 1 Dipartimento di Scienze Cliniche Specialistiche ed Odontostomatologiche-Sez. Biochimica , Facoltà di Medicina, Università Politecnica delle Marche , Ancona, Italy .,3 Departamento de Quimica Analıtica y Alimentaria, Grupo de Nutricion y Bromatologıa, Universidade Vigo , Ourense, Spain
| | - Alfonso Varela-Lopez
- 1 Dipartimento di Scienze Cliniche Specialistiche ed Odontostomatologiche-Sez. Biochimica , Facoltà di Medicina, Università Politecnica delle Marche , Ancona, Italy
| | - Jose L Quiles
- 4 Department of Physiology, Institute of Nutrition and Food Technology "Jose Mataix," Biomedical Research Centre, University of Granada , Granada, Spain
| | - Maurizio Battino
- 1 Dipartimento di Scienze Cliniche Specialistiche ed Odontostomatologiche-Sez. Biochimica , Facoltà di Medicina, Università Politecnica delle Marche , Ancona, Italy .,5 Centre for Nutrition and Health, Universidad Europea del Atlantico (UEA) , Santander, Spain
| |
Collapse
|
8
|
Sil P, Wong SW, Martinez J. More Than Skin Deep: Autophagy Is Vital for Skin Barrier Function. Front Immunol 2018; 9:1376. [PMID: 29988591 PMCID: PMC6026682 DOI: 10.3389/fimmu.2018.01376] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 06/04/2018] [Indexed: 12/30/2022] Open
Abstract
The skin is a highly organized first line of defense that stretches up to 1.8 m2 and is home to more than a million commensal bacteria. The microenvironment of skin is driven by factors such as pH, temperature, moisture, sebum level, oxidative stress, diet, resident immune cells, and infectious exposure. The skin has a high turnover of cells as it continually bares itself to environmental stresses. Notwithstanding these limitations, it has devised strategies to adapt as a nutrient-scarce site. To perform its protective function efficiently, it relies on mechanisms to continuously remove dead cells without alarming the immune system, actively purging the dying/senescent cells by immunotolerant efferocytosis. Both canonical (starvation-induced, reactive oxygen species, stress, and environmental insults) and non-canonical (selective) autophagy in the skin have evolved to perform astute due-diligence and housekeeping in a quiescent fashion for survival, cellular functioning, homeostasis, and immune tolerance. The autophagic “homeostatic rheostat” works tirelessly to uphold the delicate balance in immunoregulation and tolerance. If this equilibrium is upset, the immune system can wreak havoc and initiate pathogenesis. Out of all the organs, the skin remains under-studied in the context of autophagy. Here, we touch upon some of the salient features of autophagy active in the skin.
Collapse
Affiliation(s)
- Payel Sil
- Immunity, Inflammation, and Disease Laboratory, National Institute of Environmental Health Sciences, Durham, NC, United States
| | - Sing-Wai Wong
- Immunity, Inflammation, and Disease Laboratory, National Institute of Environmental Health Sciences, Durham, NC, United States.,Oral and Craniofacial Biomedicine Curriculum, School of Dentistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Jennifer Martinez
- Immunity, Inflammation, and Disease Laboratory, National Institute of Environmental Health Sciences, Durham, NC, United States
| |
Collapse
|
9
|
Kumar R, Deep G, Agarwal R. An Overview of Ultraviolet B Radiation-Induced Skin Cancer Chemoprevention by Silibinin. ACTA ACUST UNITED AC 2015; 1:206-215. [PMID: 26097804 DOI: 10.1007/s40495-015-0027-9] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Skin cancer incidences are rising worldwide, and one of the major causative factors is excessive exposure to solar ultraviolet radiation (UVR). Annually, ~5 million skin cancer patients are treated in United States, mostly with nonmelanoma skin cancer (NMSC), which is also frequent in other Western countries. As sunscreens do not provide adequate protection against deleterious effects of UVR, additional and alternative chemoprevention strategies are urgently needed to reduce skin cancer burden. Over the last couple of decades, extensive research has been conducted to understand the molecular basis of skin carcinogenesis, and to identifying novel agents which could be useful in the chemoprevention of skin cancer. In this regard, several natural non-toxic compounds have shown promising efficacy in preventing skin carcinogenesis at initiation, promotion and progression stages, and are considered important in better management of skin cancer. Consistent with this, we and others have studied and established the notable efficacy of natural flavonolignan silibinin against UVB-induced skin carcinogenesis. Extensive pre-clinical animal and cell culture studies report strong anti-inflammatory, anti-oxidant, DNA damage repair, immune-modulatory and anti-proliferative properties of silibinin. Molecular studies have identified that silibinin targets pleotropic signaling pathways including mitogenic, cell cycle, apoptosis, autophagy, p53, NF-κB, etc. Overall, the skin cancer chemopreventive potential of silibinin is well supported by comprehensive mechanistic studies, suggesting its greater use against UV-induced cellular damages and photocarcinogenesis.
Collapse
Affiliation(s)
- Rahul Kumar
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences
| | - Gagan Deep
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences ; University of Colorado Cancer Center, University of Colorado Denver, Aurora, Colorado 80045, USA
| | - Rajesh Agarwal
- Department of Pharmaceutical Sciences, Skaggs School of Pharmacy and Pharmaceutical Sciences ; University of Colorado Cancer Center, University of Colorado Denver, Aurora, Colorado 80045, USA
| |
Collapse
|
10
|
Lim R, Morwood CJ, Barker G, Lappas M. Effect of silibinin in reducing inflammatory pathways in in vitro and in vivo models of infection-induced preterm birth. PLoS One 2014; 9:e92505. [PMID: 24647589 PMCID: PMC3960267 DOI: 10.1371/journal.pone.0092505] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Accepted: 02/21/2014] [Indexed: 12/21/2022] Open
Abstract
Infection-induced preterm birth is the largest cause of infant death and of neurological disabilities in survivors. Silibinin, from milk thistle, exerts potent anti-inflammatory activities in non-gestational tissues. The aims of this study were to determine the effect of silibinin on pro-inflammatory mediators in (i) human fetal membranes and myometrium treated with bacterial endotoxin lipopolysaccharide (LPS) or the pro-inflammatory cytokine IL-1β, and (ii) in preterm fetal membranes with active infection. The effect of silibinin on infection induced inflammation and brain injury in pregnant mice was also assessed. Fetal membranes and myometrium (tissue explants and primary cells) were treated with 200 μM silibinin in the presence or absence of 10 μg/ml LPS or 1 ng/ml IL-1β. C57BL/6 mice were injected with 70 mg/kg silibinin with or without 50 μg LPS on embryonic day 16. Fetal brains were collected after 6 h. In human fetal membranes, silibinin significantly decreased LPS-stimulated expression of IL-6 and IL-8, COX-2, and prostaglandins PGE2 and PGF2α. In primary amnion and myometrial cells, silibinin also decreased IL-1β-induced MMP-9 expression. Preterm fetal membranes with active infection treated with silibinin showed a decrease in IL-6, IL-8 and MMP-9 expression. Fetal brains from mice treated with silibinin showed a significant decrease in LPS-induced IL-8 and ninjurin, a marker of brain injury. Our study demonstrates that silibinin can reduce infection and inflammation-induced pro-labour mediators in human fetal membranes and myometrium. Excitingly, the in vivo results indicate a protective effect of silibinin on infection-induced brain injury in a mouse model of preterm birth.
Collapse
Affiliation(s)
- Ratana Lim
- Mercy Perinatal Research Centre, Mercy Hospital for Women, Heidelberg, Victoria, Australia
- Obstetrics, Nutrition and Endocrinology Group, Department of Obstetrics and Gynaecology, University of Melbourne, Victoria, Australia
| | - Carrington J. Morwood
- Mercy Perinatal Research Centre, Mercy Hospital for Women, Heidelberg, Victoria, Australia
- Obstetrics, Nutrition and Endocrinology Group, Department of Obstetrics and Gynaecology, University of Melbourne, Victoria, Australia
| | - Gillian Barker
- Mercy Perinatal Research Centre, Mercy Hospital for Women, Heidelberg, Victoria, Australia
- Obstetrics, Nutrition and Endocrinology Group, Department of Obstetrics and Gynaecology, University of Melbourne, Victoria, Australia
| | - Martha Lappas
- Mercy Perinatal Research Centre, Mercy Hospital for Women, Heidelberg, Victoria, Australia
- Obstetrics, Nutrition and Endocrinology Group, Department of Obstetrics and Gynaecology, University of Melbourne, Victoria, Australia
- * E-mail:
| |
Collapse
|
11
|
Singh M, Suman S, Shukla Y. New Enlightenment of Skin Cancer Chemoprevention through Phytochemicals: In Vitro and In Vivo Studies and the Underlying Mechanisms. BIOMED RESEARCH INTERNATIONAL 2014; 2014:243452. [PMID: 24757666 PMCID: PMC3976810 DOI: 10.1155/2014/243452] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/01/2013] [Revised: 12/05/2013] [Accepted: 12/05/2013] [Indexed: 02/08/2023]
Abstract
Skin cancer is still a major cause of morbidity and mortality worldwide. Skin overexposure to ultraviolet irradiations, chemicals, and several viruses has a capability to cause severe skin-related disorders including immunosuppression and skin cancer. These factors act in sequence at various steps of skin carcinogenesis via initiation, promotion, and/or progression. These days cancer chemoprevention is recognized as the most hopeful and novel approach to prevent, inhibit, or reverse the processes of carcinogenesis by intervention with natural products. Phytochemicals have antioxidant, antimutagenic, anticarcinogenic, and carcinogen detoxification capabilities thereby considered as efficient chemopreventive agents. Considerable efforts have been done to identify the phytochemicals which may possibly act on one or several molecular targets that modulate cellular processes such as inflammation, immunity, cell cycle progression, and apoptosis. Till date several phytochemicals in the light of chemoprevention have been studied by using suitable skin carcinogenic in vitro and in vivo models and proven as beneficial for prevention of skin cancer. This revision presents a comprehensive knowledge and the main molecular mechanisms of actions of various phytochemicals in the chemoprevention of skin cancer.
Collapse
Affiliation(s)
- Madhulika Singh
- Proteomics Laboratory, Council of Scientific & Industrial Research, Indian Institute of Toxicology Research, P.O. Box 80, M. G. Marg, Lucknow 226001, India
| | - Shankar Suman
- Proteomics Laboratory, Council of Scientific & Industrial Research, Indian Institute of Toxicology Research, P.O. Box 80, M. G. Marg, Lucknow 226001, India
| | - Yogeshwer Shukla
- Proteomics Laboratory, Council of Scientific & Industrial Research, Indian Institute of Toxicology Research, P.O. Box 80, M. G. Marg, Lucknow 226001, India
| |
Collapse
|
12
|
Cha HJ, Lee KS, Lee GT, Lee KK, Hong JT, Lee SN, Jang HH, Lee JH, Park IC, Kim YR, Ahn KJ, Kwon SB, An IS, An S, Bae S. Altered miRNA expression profiles are involved in the protective effects of troxerutin against ultraviolet B radiation in normal human dermal fibroblasts. Int J Mol Med 2014; 33:957-63. [PMID: 24504083 DOI: 10.3892/ijmm.2014.1647] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2013] [Accepted: 01/28/2014] [Indexed: 11/06/2022] Open
Abstract
The aim of this study was to investigate the mechanisms by which troxerutin protects cells against ultraviolet B (UVB) radiation. First, we demonstrate that pre-treatment with troxerutin protects normal human dermal fibroblasts (nHDFs) against UVB-induced cytotoxicity. As shown by migration assay and DNA repair analysis, troxerutin increased cell migration and DNA repair activity in the nHDFs. Subsequently, we analyzed microRNA (miRNA) expression profiles in the nHDFs. miRNAs are 19- to 24-nucleotide (nt) non-coding RNA molecules that regulate the translation of target genes through RNA interference. In UVB-exposed cells, miRNAs act on crucial functions, such as apoptosis and cellular senescence. miRNA expression is significantly altered during the protective process induced by phytochemicals. Therefore, understanding changes that occur in miRNA expression profiles may help to elucidate the protective mechanisms of troxerutin. We identified 11 miRNAs that were significantly (>2-fold) upregulated and 12 that were significantly downregulated (>2-fold) following treatment of the nHDFs with troxerutin. In addition, we investigated the biological functions of these miRNAs through the prediction of miRNA targets and Gene Ontology analysis of the putative targets. Overall, our findings indicate that pre-treatment with troxerutin increases the viability of UVB-exposed nHDFs through the alteration of the miRNA expression profiles.
Collapse
Affiliation(s)
- Hwa Jun Cha
- Korea Institute for Skin and Clinical Sciences and Molecular-Targeted Drug Research Center, Konkuk University, Seoul 143-701, Republic of Korea
| | - Kwang Sik Lee
- Songpa R&D Center, Coreana Cosmetics Co., Ltd., Cheonan, Chungcheongnam-do 330-833, Republic of Korea
| | - Ghang Tai Lee
- Songpa R&D Center, Coreana Cosmetics Co., Ltd., Cheonan, Chungcheongnam-do 330-833, Republic of Korea
| | - Kun Kook Lee
- Songpa R&D Center, Coreana Cosmetics Co., Ltd., Cheonan, Chungcheongnam-do 330-833, Republic of Korea
| | - Jin Tae Hong
- College of Pharmacy and Medical Research Center, Chungbuk National University, Cheongju, Chungcheongbuk‑do 361-763, Republic of Korea
| | - Sung Nae Lee
- Department of Cosmetology, Kyung-In Women's College, Incheon 407-740, Republic of Korea
| | - Hyun Hee Jang
- School of Art, Kyungbok University, Namyangju, Gyeonggi-do 472-948, Republic of Korea
| | - Jae Ho Lee
- Laboratory of Molecular Oncology, Cheil General Hospital and Women's Healthcare Center, Kwandong University College of Medicine, Seoul 100‑380, Republic of Korea
| | - In-Chul Park
- Laboratory of Functional Genomics, Korea Institute of Radiological and Medical Sciences, Seoul 139-706, Republic of Korea
| | - Yu Ri Kim
- Department of Dermatology, Konkuk University School of Medicine, Seoul 143-701, Republic of Korea
| | - Kyu Joong Ahn
- Department of Dermatology, Konkuk University School of Medicine, Seoul 143-701, Republic of Korea
| | - Seung Bin Kwon
- Korea Institute for Skin and Clinical Sciences and Molecular-Targeted Drug Research Center, Konkuk University, Seoul 143-701, Republic of Korea
| | - In-Sook An
- Korea Institute for Skin and Clinical Sciences and Molecular-Targeted Drug Research Center, Konkuk University, Seoul 143-701, Republic of Korea
| | - Sungkwan An
- Korea Institute for Skin and Clinical Sciences and Molecular-Targeted Drug Research Center, Konkuk University, Seoul 143-701, Republic of Korea
| | - Seunghee Bae
- Korea Institute for Skin and Clinical Sciences and Molecular-Targeted Drug Research Center, Konkuk University, Seoul 143-701, Republic of Korea
| |
Collapse
|
13
|
Liu W, Otkur W, Zhang Y, Li Q, Ye Y, Zang L, He H, Hayashi T, Tashiro SI, Onodera S, Ikejima T. Silibinin protects murine fibroblast L929 cells from UVB-induced apoptosis through the simultaneous inhibition of ATM-p53 pathway and autophagy. FEBS J 2013; 280:4572-84. [PMID: 23829351 DOI: 10.1111/febs.12426] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 07/01/2013] [Accepted: 07/03/2013] [Indexed: 12/15/2022]
Abstract
Ultraviolet B (UVB) is a major cause of skin inflammation, leading to skin damage. Our previous in vivo study revealed that a natural flavonoid silibinin had marked anti-inflammatory effect on UVB-exposed murine skin. UVB exposure caused reduced autophagy in epidermis while it promoted autophagy in dermis. Nevertheless, silibinin inhibited the inflammatory flux in the skin epidermis as well as dermis through the modulation of autophagy. In order to elucidate the underlying protective mechanisms of silibinin for UVB damage on skin, separate studies on epidermis and dermis are helpful. Derived from the normal tissue of the mouse, L929 cells are capable of representing some characteristics of dermal cells. UVB irradiation caused L929 cell apoptosis in a time- and dose-dependent manner. Ataxia-telangiectasia-mutated (ATM) protein and p53 were activated to cause cell apoptosis, accompanying upregulation of the autophagic flux. The pharmacological inhibition of ATM, p53 and autophagy or the transfection with autophagy-associated protein-targeted small interfering RNAs showed that the UVB-activated ATM-p53 axis and autophagy formed a positive feedback loop, which synergistically promoted cell apoptosis. Silibinin treatment simultaneously repressed the activation of ATM-p53 and autophagy and thereby protected UVB-irradiated L929 cells from apoptotic death.
Collapse
Affiliation(s)
- Weiwei Liu
- China-Japan Research Institute of Medical and Pharmaceutical Sciences, Shenyang Pharmaceutical University, Liaoning, China
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Liu W, Otkur W, Li L, Wang Q, He H, Ye Y, Zhang Y, Hayashi T, Tashiro SI, Onodera S, Ikejima T. Autophagy induced by silibinin protects human epidermoid carcinoma A431 cells from UVB-induced apoptosis. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2013; 123:23-31. [PMID: 23608670 DOI: 10.1016/j.jphotobiol.2013.03.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2013] [Revised: 03/26/2013] [Accepted: 03/28/2013] [Indexed: 12/21/2022]
Abstract
Ultraviolet B (UVB) in the sun light is a major cause of skin damage, which accompanies complex alterations in irradiated skin cells, including DNA lesions, oxidative stress, inflammation and caspase activation. The protection against UVB damage requires multiple interruptions such as repair of the DNA lesions, scavenging of the reactive oxygen species (ROS), repression of the inflammation and others. Silibinin is suggested as an anti-UVB reagent, but the underlying mechanisms have not been fully elucidated. In this study, we found a role of autophagy in the anti-UVB effect of silibinin in A431 cells. Autophagy was reduced after UVB-irradiation while restored by silibinin through the suppression of the IGF-1R signalling pathway. The protective effect of silibinin in UVB-irradiated A431 cells was further enhanced by pre-treatment with an autophagy inducer, rapamycin, while it was reversed by an autophagy inhibitor, wortmannin, indicating that elevated autophagy contributed to the cell survival. Consistently, cell apoptosis was augmented by siRNAs targeting Beclin 1 and Atg5, supporting the hypothesis that autophagy induced by silibinin plays a protective role against UVB-induced epidermal apoptosis.
Collapse
Affiliation(s)
- Weiwei Liu
- China-Japan Research Institute of Medical and Pharmaceutical Sciences, Shenyang Pharmaceutical University, Shenyang 110016, China
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
15
|
Liu W, Otkur W, Li L, Wang Q, He H, Zang L, Hayashi T, Tashiro SI, Onodera S, Xia M, Ikejima T. Interference of silibinin with IGF-1R signalling pathways protects human epidermoid carcinoma A431 cells from UVB-induced apoptosis. Biochem Biophys Res Commun 2013; 432:314-9. [PMID: 23396055 DOI: 10.1016/j.bbrc.2013.01.109] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Accepted: 01/29/2013] [Indexed: 12/24/2022]
Abstract
Ultraviolet B (UVB) from sunlight is a major cause of cutaneous lesion. Silibinin, a traditional hepatic protectant, elicits protective effects against UVB-induced cellular damage. In A431 cells, the insulin-like growth factor-1 receptor (IGF-1R) was markedly up-regulated by UVB irradiation. The activation of the IGF-1R signalling pathways contributed to apoptosis of the cells rather than rescuing the cells from death. Up-regulated IGF-1R stimulated downstream mitogen-activated protein kinases (MAPKs), such as c-Jun N-terminal kinases (JNK) and extracellular signal-regulated protein kinases 1/2 (ERK1/2). The subsequent activation of caspase-8 and caspase-3 led to apoptosis. The activation of IGF-1R signalling pathways is the cause of A431 cell death. The pharmacological inhibitors and the small interfering RNA (siRNA) targeting IGF-1R suppressed the downstream activation of JNK/ERK-caspases to help the survival of the UVB-irradiated A431 cells. Indeed, silibinin treatment suppressed the IGF-1R-JNK/ERK pathways and thus protected the cells from UVB-induced apoptosis.
Collapse
Affiliation(s)
- Weiwei Liu
- China-Japan Research Institute of Medical and Pharmaceutical Sciences, Shenyang Pharmaceutical University, Shenyang 110016, China
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Salucci S, Burattini S, Battistelli M, Baldassarri V, Maltarello MC, Falcieri E. Ultraviolet B (UVB) irradiation-induced apoptosis in various cell lineages in vitro. Int J Mol Sci 2012; 14:532-46. [PMID: 23271369 PMCID: PMC3565280 DOI: 10.3390/ijms14010532] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 12/19/2012] [Accepted: 12/21/2012] [Indexed: 12/19/2022] Open
Abstract
Ultraviolet B (UVB) radiation acts as a strong apoptotic trigger in many cell types, in tumor and normal cells. Several studies have demonstrated that UVB-induced cell death occurs through the generation of reactive oxygen species. The consequent oxidative stress includes the impairment of cellular antioxidants, the induction of DNA damage and the occurrence of apoptosis. In this review, we investigated UVB apoptotic action in various cell models by using ultrastructural, molecular and cytofluorimetric techniques. Myeloid leukemia HL-60, T-lymphoblastoid Molt-4 and myelomonocytic U937 human cells, generally affected by apoptotic stimuli, were studied. Human chondrocytes and C2C12 skeletal muscle cells, known to be more resistant to damage, were also considered. All of them, when exposed to UVB radiation, revealed a number of characteristic apoptotic markers. Membrane blebbing, cytoplasm shrinkage and chromatin condensation were detected by means of electron microscopy. DNA cleavage, investigated by using agarose gel electrophoresis and TUNEL reaction, was observed in suspended cells. Differently, in chondrocytes and in skeletal muscle cells, oligonucleosomic DNA fragmentation did not appear, even if a certain TUNEL positivity was detected. These findings demonstrate that UVB radiation appears to be an ideal tool to study the apoptotic behavior.
Collapse
Affiliation(s)
- Sara Salucci
- DiSTeVA, University of Urbino “Carlo Bo”, Urbino 61029, Italy; E-Mails: (S.S.); (S.B.); (M.B.); (V.B.)
| | - Sabrina Burattini
- DiSTeVA, University of Urbino “Carlo Bo”, Urbino 61029, Italy; E-Mails: (S.S.); (S.B.); (M.B.); (V.B.)
| | - Michela Battistelli
- DiSTeVA, University of Urbino “Carlo Bo”, Urbino 61029, Italy; E-Mails: (S.S.); (S.B.); (M.B.); (V.B.)
| | - Valentina Baldassarri
- DiSTeVA, University of Urbino “Carlo Bo”, Urbino 61029, Italy; E-Mails: (S.S.); (S.B.); (M.B.); (V.B.)
| | - Maria Cristina Maltarello
- Laboratory of Musculoskeletal Cell Biology, Rizzoli Orthopaedic Institute, Bologna 40136, Italy; E-Mail:
| | - Elisabetta Falcieri
- DiSTeVA, University of Urbino “Carlo Bo”, Urbino 61029, Italy; E-Mails: (S.S.); (S.B.); (M.B.); (V.B.)
- IGM, CNR, Rizzoli Orthopaedic Institute, Bologna 40136, Italy
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +39-0722304284; Fax: +39-0722304244
| |
Collapse
|