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Sarda A, Vaidyanathan V, Das S, De A. Laser and Lights in Psoriasis. Indian J Dermatol 2024; 69:159-164. [PMID: 38841222 PMCID: PMC11149792 DOI: 10.4103/ijd.ijd_423_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2024] Open
Abstract
Psoriasis is a chronic inflammatory skin condition affecting millions of individuals worldwide. Over the years, various treatment modalities have been explored to alleviate the symptoms and improve the quality of life for patients with psoriasis. Among these treatment options, lasers and lights have emerged as promising non-invasive approaches with significant efficacy. This review aims to provide an overview of the current understanding and clinical applications of lasers and lights in the management of psoriasis. We have discussed the mechanisms of action behind different laser and light therapies and their impact on psoriatic plaques. Additionally, we discuss the various types of lasers and lights utilized, including excimer lasers, pulsed dye lasers, and narrowband ultraviolet B (NB-UVB) phototherapy, highlighting their unique properties and clinical outcomes. Moreover, we have addressed important considerations related to patient selection, treatment protocols, and potential side effects associated with lasers and lights. We emphasize the need for proper evaluation, monitoring, and customization of treatment plans to ensure optimal outcomes and minimize adverse events.
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Affiliation(s)
- Aarti Sarda
- From the Consultant Dermatologist, Wizderm Speciality Skin and Hair Clinic, New Delhi, India
| | | | - Sudip Das
- Department of Dermatology, Calcutta National Medical College, Kolkata, West Bengal, India
| | - Abhishek De
- Department of Dermatology, Calcutta National Medical College, Kolkata, West Bengal, India
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2
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Zhou F, Wang P, Chen J, Zhu Z, Li Y, Wang S, Wu S, Sima Y, Fu T, Tan W, Zhao Z. A photochemically covalent lock stabilizes aptamer conformation and strengthens its performance for biomedicine. Nucleic Acids Res 2022; 50:9039-9050. [PMID: 35993818 PMCID: PMC9458419 DOI: 10.1093/nar/gkac703] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 07/13/2022] [Accepted: 08/04/2022] [Indexed: 12/24/2022] Open
Abstract
Aptamers' vast conformation ensemble consisting of interconverting substates severely impairs their performance and applications in biomedicine. Therefore, developing new chemistries stabilizing aptamer conformation and exploring the conformation-performance relationship are highly desired. Herein, we developed an 8-methoxypsoralen-based photochemically covalent lock to stabilize aptamer conformation via crosslinking the inter-stranded thymine nucleotides at TpA sites. Systematical studies and molecular dynamics simulations were performed to explore the conformation-performance relationship of aptamers, revealing that conformation-stabilized aptamers displayed better ability to bind targets, adapt to physiological environment, resist macrophage uptake, prolong circulation half-life, accumulate in and penetrate into tumor than their counterparts. As expected, conformation-stabilized aptamers efficiently improved the therapeutic efficacy of aptamer-drug conjugation on tumor-bearing mice. Collectively, our study has developed a general, simple and economic strategy to stabilize aptamer conformation and shed light on the conformation-performance relationship of aptamers, laying a basis for promoting their basic researches and applications in biomedicine.
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Affiliation(s)
| | | | | | - Zhijia Zhu
- Molecular Science and Biomedicine Laboratory (MBL), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha, Hunan 410082, China
| | - Youshan Li
- Molecular Science and Biomedicine Laboratory (MBL), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha, Hunan 410082, China
| | - Sujuan Wang
- Molecular Science and Biomedicine Laboratory (MBL), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha, Hunan 410082, China
| | - Shanchao Wu
- Molecular Science and Biomedicine Laboratory (MBL), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha, Hunan 410082, China
| | - Yingyu Sima
- Molecular Science and Biomedicine Laboratory (MBL), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha, Hunan 410082, China
| | - Ting Fu
- Molecular Science and Biomedicine Laboratory (MBL), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha, Hunan 410082, China,The Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences Hangzhou, Zhejiang 310022, China
| | - Weihong Tan
- Molecular Science and Biomedicine Laboratory (MBL), State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Aptamer Engineering Center of Hunan Province, Hunan University, Changsha, Hunan 410082, China,The Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences Hangzhou, Zhejiang 310022, China,Institute of Molecular Medicine (IMM), Renji Hospital, Shanghai Jiao Tong University School of Medicine, and College of Chemistry and Chemical Engineering, Shanghai Jiao Tong University Shanghai 200240, China
| | - Zilong Zhao
- To whom correspondence should be addressed. Tel: +86 731 88821894; Fax: +86 731 88821894;
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3
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Ljungman M. Transcription and genome integrity. DNA Repair (Amst) 2022; 118:103373. [PMID: 35914488 DOI: 10.1016/j.dnarep.2022.103373] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2022] [Revised: 07/16/2022] [Accepted: 07/17/2022] [Indexed: 11/03/2022]
Abstract
Transcription can cause genome instability by promoting R-loop formation but also act as a mutation-suppressing machinery by sensing of DNA lesions leading to the activation of DNA damage signaling and transcription-coupled repair. Recovery of RNA synthesis following the resolution of repair of transcription-blocking lesions is critical to avoid apoptosis and several new factors involved in this process have recently been identified. Some DNA repair proteins are recruited to initiating RNA polymerases and this may expediate the recruitment of other factors that participate in the repair of transcription-blocking DNA lesions. Recent studies have shown that transcription of protein-coding genes does not always give rise to spliced transcripts, opening the possibility that cells may use the transcription machinery in a splicing-uncoupled manner for other purposes including surveillance of the transcribed genome.
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Affiliation(s)
- Mats Ljungman
- Departments of Radiation Oncology and Environmental Health Sciences, Rogel Cancer Center and Center for RNA Biomedicine, University of Michigan, Ann Arbor, MI, USA.
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4
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Housh K, Jha JS, Yang Z, Haldar T, Johnson KM, Yin J, Wang Y, Gates KS. Formation and Repair of an Interstrand DNA Cross-Link Arising from a Common Endogenous Lesion. J Am Chem Soc 2021; 143:15344-15357. [PMID: 34516735 DOI: 10.1021/jacs.1c06926] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Interstrand DNA cross-links (ICLs) are cytotoxic because they block the strand separation required for read-out and replication of the genetic information in duplex DNA. The unavoidable formation of ICLs in cellular DNA may contribute to aging, neurodegeneration, and cancer. Here, we describe the formation and properties of a structurally complex ICL derived from an apurinic/apyrimidinic (AP) site, which is one of the most common endogenous lesions in cellular DNA. The results characterize a cross-link arising from aza-Michael addition of the N2-amino group of a guanine residue to the electrophilic sugar remnant generated by spermine-mediated strand cleavage at an AP site in duplex DNA. An α,β-unsaturated iminium ion is the critical intermediate involved in ICL formation. Studies employing the bacteriophage φ29 polymerase provided evidence that this ICL can block critical DNA transactions that require strand separation. The results of biochemical studies suggest that this complex strand break/ICL might be repaired by a simple mechanism in which the 3'-exonuclease action of the enzyme apurinic/apyrimidinic endonuclease (APE1) unhooks the cross-link to initiate repair via the single-strand break repair pathway.
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Affiliation(s)
- Kurt Housh
- University of Missouri Department of Chemistry 125 Chemistry Building Columbia, Missouri 65211, United States
| | - Jay S Jha
- University of Missouri Department of Chemistry 125 Chemistry Building Columbia, Missouri 65211, United States
| | - Zhiyu Yang
- University of Missouri Department of Chemistry 125 Chemistry Building Columbia, Missouri 65211, United States
| | - Tuhin Haldar
- University of Missouri Department of Chemistry 125 Chemistry Building Columbia, Missouri 65211, United States
| | - Kevin M Johnson
- University of Missouri Department of Chemistry 125 Chemistry Building Columbia, Missouri 65211, United States
| | - Jiekai Yin
- Department of Chemistry University of California-Riverside Riverside, California 92521-0403, United States
| | - Yinsheng Wang
- Department of Chemistry University of California-Riverside Riverside, California 92521-0403, United States
| | - Kent S Gates
- University of Missouri Department of Chemistry 125 Chemistry Building Columbia, Missouri 65211, United States.,University of Missouri Department of Biochemistry 125 Chemistry Building Columbia, Missouri 65211, United States
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5
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Whitfield C, Zhang M, Winterwerber P, Wu Y, Ng DYW, Weil T. Functional DNA-Polymer Conjugates. Chem Rev 2021; 121:11030-11084. [PMID: 33739829 PMCID: PMC8461608 DOI: 10.1021/acs.chemrev.0c01074] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Indexed: 02/07/2023]
Abstract
DNA nanotechnology has seen large developments over the last 30 years through the combination of solid phase synthesis and the discovery of DNA nanostructures. Solid phase synthesis has facilitated the availability of short DNA sequences and the expansion of the DNA toolbox to increase the chemical functionalities afforded on DNA, which in turn enabled the conception and synthesis of sophisticated and complex 2D and 3D nanostructures. In parallel, polymer science has developed several polymerization approaches to build di- and triblock copolymers bearing hydrophilic, hydrophobic, and amphiphilic properties. By bringing together these two emerging technologies, complementary properties of both materials have been explored; for example, the synthesis of amphiphilic DNA-polymer conjugates has enabled the production of several nanostructures, such as spherical and rod-like micelles. Through both the DNA and polymer parts, stimuli-responsiveness can be instilled. Nanostructures have consequently been developed with responsive structural changes to physical properties, such as pH and temperature, as well as short DNA through competitive complementary binding. These responsive changes have enabled the application of DNA-polymer conjugates in biomedical applications including drug delivery. This review discusses the progress of DNA-polymer conjugates, exploring the synthetic routes and state-of-the-art applications afforded through the combination of nucleic acids and synthetic polymers.
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Affiliation(s)
- Colette
J. Whitfield
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Meizhou Zhang
- Hubei
Key Laboratory of Bioinorganic Chemistry and Materia Medica, School
of Chemistry and Chemical Engineering, Huazhong
University of Science and Technology, Luoyu Road 1037, Hongshan, Wuhan 430074, People’s Republic of China
| | - Pia Winterwerber
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Yuzhou Wu
- Hubei
Key Laboratory of Bioinorganic Chemistry and Materia Medica, School
of Chemistry and Chemical Engineering, Huazhong
University of Science and Technology, Luoyu Road 1037, Hongshan, Wuhan 430074, People’s Republic of China
| | - David Y. W. Ng
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
| | - Tanja Weil
- Max
Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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6
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Biskup E, Niazi O, Pless V. Cell membrane permeability and defective G2/M block as factors potentially contributing to increased cell chemosensitivity. SeAx cell line as an example. Biochem Biophys Rep 2021; 26:101005. [PMID: 34027132 PMCID: PMC8129889 DOI: 10.1016/j.bbrep.2021.101005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 04/05/2021] [Accepted: 04/20/2021] [Indexed: 11/28/2022] Open
Abstract
Background Immortalized mammalian cell lines are a valuable research tool, though they represent a highly simplified model. Due to accumulated mutations they may not reflect characteristics of the disease or even the tissue they derive from. Objective We aim to pinpoint factors distinguishing SeAx cells from two other cutaneous T-cell lymphoma (CTCL) cell lines, namely Hut78 and MyLa2000. Of note, these factors may influence cell sensitivity in an unspecific way and therefore should be taken under consideration. Methods We evaluated transcriptional levels of drug transporters across cell lines, cell membrane permeability, functionality of pathways related to DNA damage response and activation of G2/M block. Results Analysis of the transcriptional levels of genes coding drug efflux pumps indicated that they are not consistently down-regulated in SeAx. However, we noted that SeAx cell membrane is markedly more permeable than Hut78 and MyLa2000, which may contribute to increased chemosensitivity in an unspecific way. Moreover, though DNA damage response seemed to be at least partly functional in SeAx cells, they fail to activate G2/M block in response to psoralen + UVA treatment. Any DNA damage should be repaired before cells enter mitosis, in order to uphold genome integrity. Thus, a defective cell cycle block may contribute to cell sensitivity. Conclusions We believe that factors such as increased membrane permeability or defective cell cycle block should be accounted for when comparing sensitivity of cell line panels to chemotherapeutics of interest. It is worth to exclude a simple, indiscriminative mechanisms of cell resistance or sensitivity before attempting comparisons. Cell lines that are indiscriminately sensitive to a broad range of chemicals may contribute to overestimating the cytotoxic potential of tested compounds if used in cytotoxicity studies. Mammalian cell lines are a valuable, but highly simplified model. Cell chemosensitivity and resistance may have specific or unspecific character. SeAx cell line exhibits higher chemosensitivity than other tested CTCL cell lines. SeAx chemosensitivity may result from high membrane permeability and/or defective G2/M block. Unspecific mechanisms of cell sensitivity or resistance may lead to false conclusions.
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Affiliation(s)
- Edyta Biskup
- Department of Dermatology, Bispebjerg Hospital, Bispebjerg Bakke 23, 2400, Copenhagen, Denmark
| | - Omid Niazi
- Department of Dermatology, Bispebjerg Hospital, Bispebjerg Bakke 23, 2400, Copenhagen, Denmark
| | - Vibeke Pless
- Department of Dermatology, Bispebjerg Hospital, Bispebjerg Bakke 23, 2400, Copenhagen, Denmark
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Citrus Consumption and the Risk of Non-Melanoma Skin Cancer in the Women's Health Initiative. Cancers (Basel) 2021; 13:cancers13092173. [PMID: 33946526 PMCID: PMC8125104 DOI: 10.3390/cancers13092173] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 04/15/2021] [Accepted: 04/27/2021] [Indexed: 11/23/2022] Open
Abstract
Simple Summary Citrus products are rich in furocoumarins, which can increase the risk of incident non-melanoma skin cancer (NMSC) when combined with ultraviolet radiation. However, few observational studies have evaluated the link between citrus intake and NMSC incidence. The aim of this study was to determine whether citrus intake was related to the NMSC incidence in participants of the Women’s Health Initiative Observational Study. The results of this study indicated that high citrus juice consumption was associated with a higher risk of incident NMSC compared to low consumption. These findings add further evidence of the potentially carcinogenic nature of certain citrus products and highlight the need to continue investigations in identifying risk factors and mechanisms. Abstract Evidence from animal studies suggests that furocoumarins, compounds present in citrus products, can increase the risk of non-melanoma skin cancer (NMSC) when combined with ultraviolet radiation. The objective of this study was to determine the relationship between citrus intake and NMSC risk among postmenopausal women from the Women’s Health Initiative (WHI) Observational Study, who were aged 50–79 years at enrollment (1993–1998). The consumption of citrus fruit, citrus juice, and non-citrus fruit and juice were measured at the baseline of the study using a food frequency questionnaire (FFQ). NMSC cases (basal or squamous cell carcinomas) were self-reported during annual follow-up surveys. The outcome data used for this analysis were collected through March 2020. The relative risk (RR) for incident NMSC by citrus consumption was calculated. Among 49,007 non-Hispanic white participants, there were 8642 cases of incident NMSC. Using less than one serving of citrus juice per week as reference, the RRs and 95% confidence intervals (CI) for incident NMSC by citrus juice intake were 1.03 (0.95, 1.10) for one serving/week, 1.06 (1.00, 1.12) for two to four servings/week, 0.98 (0.90, 1.07) for five to six servings/week, and 1.08 (1.02, 1.13) for one or more serving/day (p-trend = 0.007). Subgroup analyses did not reveal meaningful associations by sun exposure variables. In conclusion, there were indications of a slightly higher risk of incident NMSC among citrus juice consumers; however, further longitudinal and mechanistic studies are needed to confirm the key risk factors.
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8
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Karisma VW, Wu W, Lei M, Liu H, Nisar MF, Lloyd MD, Pourzand C, Zhong JL. UVA-Triggered Drug Release and Photo-Protection of Skin. Front Cell Dev Biol 2021; 9:598717. [PMID: 33644041 PMCID: PMC7905215 DOI: 10.3389/fcell.2021.598717] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 01/13/2021] [Indexed: 12/11/2022] Open
Abstract
Light has attracted special attention as a stimulus for triggered drug delivery systems (DDS) due to its intrinsic features of being spatially and temporally tunable. Ultraviolet A (UVA) radiation has recently been used as a source of external light stimuli to control the release of drugs using a "switch on- switch off" procedure. This review discusses the promising potential of UVA radiation as the light source of choice for photo-controlled drug release from a range of photo-responsive and photolabile nanostructures via photo-isomerization, photo-cleavage, photo-crosslinking, and photo-induced rearrangement. In addition to its clinical use, we will also provide here an overview of the recent UVA-responsive drug release approaches that are developed for phototherapy and skin photoprotection.
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Affiliation(s)
- Vega Widya Karisma
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, Bioengineering College, Chongqing University, Chongqing, China
| | - Wei Wu
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, Bioengineering College, Chongqing University, Chongqing, China
| | - Mingxing Lei
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, Bioengineering College, Chongqing University, Chongqing, China
| | - Huawen Liu
- Three Gorges Central Hospital, Chongqing, China
| | - Muhammad Farrukh Nisar
- Department of Physiology and Biochemistry, Cholistan University of Veterinary and Animal Sciences (CUVAS), Bahawalpur, Pakistan
| | - Matthew D. Lloyd
- Drug and Target Discovery, Department of Pharmacy and Pharmacology, University of Bath, Bath, United Kingdom
| | - Charareh Pourzand
- Medicines Design, Department of Pharmacy and Pharmacology, University of Bath, Bath, United Kingdom
- Medicines Development, Centre for Therapeutic Innovation, University of Bath, Bath, United Kingdom
| | - Julia Li Zhong
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, Bioengineering College, Chongqing University, Chongqing, China
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Adil MT, Henry JJ. Understanding cornea epithelial stem cells and stem cell deficiency: Lessons learned using vertebrate model systems. Genesis 2021; 59:e23411. [PMID: 33576188 DOI: 10.1002/dvg.23411] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 01/08/2021] [Accepted: 01/09/2021] [Indexed: 12/13/2022]
Abstract
Animal models have contributed greatly to our understanding of human diseases. Here, we focus on cornea epithelial stem cell (CESC) deficiency (commonly called limbal stem cell deficiency, LSCD). Corneal development, homeostasis and wound healing are supported by specific stem cells, that include the CESCs. Damage to or loss of these cells results in blindness and other debilitating ocular conditions. Here we describe the contributions from several vertebrate models toward understanding CESCs and LSCD treatments. These include both mammalian models, as well as two aquatic models, Zebrafish and the amphibian, Xenopus. Pioneering developments have been made using stem cell transplants to restore normal vision in patients with LSCD, but questions still remain about the basic biology of CESCs, including their precise cell lineages and behavior in the cornea. We describe various cell lineage tracing studies to follow their patterns of division, and the fates of their progeny during development, homeostasis, and wound healing. In addition, we present some preliminary results using the Xenopus model system. Ultimately, a more thorough understanding of these cornea cells will advance our knowledge of stem cell biology and lead to better cornea disease therapeutics.
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Affiliation(s)
- Mohd Tayyab Adil
- Department of Cell & Developmental Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
| | - Jonathan J Henry
- Department of Cell & Developmental Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA
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Vieyra-Garcia PA, Wolf P. A deep dive into UV-based phototherapy: Mechanisms of action and emerging molecular targets in inflammation and cancer. Pharmacol Ther 2020; 222:107784. [PMID: 33316286 DOI: 10.1016/j.pharmthera.2020.107784] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 11/25/2020] [Indexed: 02/07/2023]
Abstract
UV-based phototherapy (including psoralen plus UVA (PUVA), UVB and UVA1) has a long, successful history in the management of numerous cutaneous disorders. Photoresponsive diseases are etiologically diverse, but most involve disturbances in local (and occasionally systemic) inflammatory cells and/or abnormalities in keratinocytes that trigger inflammation. UV-based phototherapy works by regulating the inflammatory component and inducing apoptosis of pathogenic cells. This results in a fascinating and complex network of simultaneous events-immediate transcriptional changes in keratinocytes, immune cells, and pigment cells; the emergence of apoptotic bodies; and the trafficking of antigen-presenting cells in skin-that quickly transform the microenvironment of UV-exposed skin. Molecular elements in this system of UV recognition and response include chromophores, metabolic byproducts, innate immune receptors, neurotransmitters and mediators such as chemokines and cytokines, antimicrobial peptides, and platelet activating factor (PAF) and PAF-like molecules that simultaneously shape the immunomodulatory effects of UV and their interplay with the microbiota of the skin and beyond. Phototherapy's key effects-proapoptotic, immunomodulatory, antipruritic, antifibrotic, propigmentary, and pro-prebiotic-promote clinical improvement in various skin diseases such as psoriasis, atopic dermatitis (AD), graft-versus-host disease (GvHD), vitiligo, scleroderma, and cutaneous T-cell lymphoma (CTCL) as well as prevention of polymorphic light eruption (PLE). As understanding of phototherapy improves, new therapies (UV- and non-UV-based) are being developed that will modify regulatory T-cells (Treg), interact with (resident) memory T-cells and /or utilize agonists and antagonists as well as antibodies targeting soluble molecules such as cytokines and chemokines, transcription factors, and a variety of membrane-associated receptors.
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Affiliation(s)
- Pablo A Vieyra-Garcia
- Department of Dermatology, Medical University of Graz, Auenbruggerplatz 8, Graz A-8036, Austria.
| | - Peter Wolf
- Department of Dermatology, Medical University of Graz, Auenbruggerplatz 8, Graz A-8036, Austria.
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Photochemotherapy Induces Interferon Type III Expression via STING Pathway. Cells 2020; 9:cells9112452. [PMID: 33182724 PMCID: PMC7697763 DOI: 10.3390/cells9112452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Revised: 10/30/2020] [Accepted: 11/06/2020] [Indexed: 11/16/2022] Open
Abstract
DNA-damaging cancer therapies induce interferon expression and stimulate the immune system, promoting therapy responses. The immune-activating STING (Stimulator of Interferon Genes) pathway is induced when DNA or double-stranded RNA (dsRNA) is detected in the cell cytoplasm, which can be caused by viral infection or by DNA damage following chemo- or radiotherapy. Here, we investigated the responses of cutaneous T-cell lymphoma (CTCL) cells to the clinically applied DNA crosslinking photochemotherapy (combination of 8–methoxypsoralen and UVA light; 8–MOP + UVA). We showed that this treatment evokes interferon expression and that the type III interferon IFNL1 is the major cytokine induced. IFNL1 upregulation is dependent on STING and on the cytoplasmic DNA sensor cyclic GMP-AMP synthase (cGAS). Furthermore, 8–MOP + UVA treatment induced the expression of genes in pathways involved in response to the tumor necrosis factor, innate immune system and acute inflammatory response. Notably, a subset of these genes was under control of the STING–IFNL1 pathway. In conclusion, our data connected DNA damage with immune system activation via the STING pathway and contributed to a better understanding of the effectiveness of photochemotherapy.
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12
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Mahamat-Saleh Y, Cervenka I, Al-Rahmoun M, Mancini FR, Severi G, Ghiasvand R, Veierod MB, Caini S, Palli D, Botteri E, Sacerdote C, Ricceri F, Trichopoulou A, Peppa E, La Vecchia C, Overvad K, Dahm CC, Olsen A, Tjønneland A, Perez-Cornago A, Jakszyn P, Grioni S, Schulze MB, Skeie G, Lasheras C, Colorado-Yohar S, Rodríguez-Barranco M, Kühn T, Katzke VA, Amiano P, Tumino R, Panico S, Ezponda A, Sonestedt E, Scalbert A, Weiderpass E, Boutron-Ruault MC, Kvaskoff M. Citrus intake and risk of skin cancer in the European Prospective Investigation into Cancer and Nutrition cohort (EPIC). Eur J Epidemiol 2020; 35:1057-1067. [PMID: 32710289 DOI: 10.1007/s10654-020-00666-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 07/16/2020] [Indexed: 01/10/2023]
Abstract
Citrus intake has been suggested to increase the risk of skin cancer. Although this relation is highly plausible biologically, epidemiologic evidence is lacking. We aimed to examine the potential association between citrus intake and skin cancer risk. EPIC is an ongoing multi-center prospective cohort initiated in 1992 and involving ~ 520,000 participants who have been followed-up in 23 centers from 10 European countries. Dietary data were collected at baseline using validated country-specific dietary questionnaires. We used Cox proportional hazards regression models to compute hazard ratios (HR) and 95% confidence intervals (CI). During a mean follow-up of 13.7 years, 8448 skin cancer cases were identified among 270,112 participants. We observed a positive linear dose-response relationship between total citrus intake and skin cancer risk (HR = 1.10, 95% CI 1.03-1.18 in the highest vs. lowest quartile; Ptrend = 0.001), particularly with basal cell carcinoma (BCC) (HR = 1.11, 95% CI 1.02-1.20, Ptrend = 0.007) and squamous cell carcinoma (SCC) (HR = 1.23, 95% CI 1.04-1.47, Ptrend = 0.01). Citrus fruit intake was positively associated with skin cancer risk (HR = 1.08, 95% CI 1.01-1.16, Ptrend = 0.01), particularly with melanoma (HR = 1.23, 95% CI 1.02-1.48; Ptrend = 0.01), although with no heterogeneity across skin cancer types (Phomogeneity = 0.21). Citrus juice was positively associated with skin cancer risk (Ptrend = 0.004), particularly with BCC (Ptrend = 0.008) and SCC (Ptrend = 0.004), but not with melanoma (Phomogeneity = 0.02). Our study suggests moderate positive linear dose-response relationships between citrus intake and skin cancer risk. Studies with available biomarker data and the ability to examine sun exposure behaviors are warranted to clarify these associations and examine the phototoxicity mechanisms of furocoumarin-rich foods.
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Affiliation(s)
- Yahya Mahamat-Saleh
- CESP, Fac. de médecine - Univ. Paris-Sud, Fac. de médecine - UVSQ, INSERM, Université Paris Saclay, 94 805, Villejuif, France
- Inserm UMR1018, Gustave Roussy, 114 Rue Edouard Vaillant, F-94805, Villejuif, France
| | - Iris Cervenka
- CESP, Fac. de médecine - Univ. Paris-Sud, Fac. de médecine - UVSQ, INSERM, Université Paris Saclay, 94 805, Villejuif, France
- Inserm UMR1018, Gustave Roussy, 114 Rue Edouard Vaillant, F-94805, Villejuif, France
| | - Marie Al-Rahmoun
- CESP, Fac. de médecine - Univ. Paris-Sud, Fac. de médecine - UVSQ, INSERM, Université Paris Saclay, 94 805, Villejuif, France
- Inserm UMR1018, Gustave Roussy, 114 Rue Edouard Vaillant, F-94805, Villejuif, France
| | - Francesca R Mancini
- CESP, Fac. de médecine - Univ. Paris-Sud, Fac. de médecine - UVSQ, INSERM, Université Paris Saclay, 94 805, Villejuif, France
- Inserm UMR1018, Gustave Roussy, 114 Rue Edouard Vaillant, F-94805, Villejuif, France
| | - Gianluca Severi
- CESP, Fac. de médecine - Univ. Paris-Sud, Fac. de médecine - UVSQ, INSERM, Université Paris Saclay, 94 805, Villejuif, France
- Inserm UMR1018, Gustave Roussy, 114 Rue Edouard Vaillant, F-94805, Villejuif, France
| | - Reza Ghiasvand
- Oslo Centre for Biostatistics and Epidemiology, Department of Biostatistics, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
| | - Marit B Veierod
- Oslo Centre for Biostatistics and Epidemiology, Department of Biostatistics, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
| | - Saverio Caini
- Cancer Risk Factors and Lifestyle Epidemiology Unit, Cancer Research, Prevention and Clinical Network Institute (ISPRO), Florence, Italy
| | - Domenico Palli
- Cancer Risk Factors and Lifestyle Epidemiology Unit, Cancer Research, Prevention and Clinical Network Institute (ISPRO), Florence, Italy
| | - Edoardo Botteri
- Department of Bowel Cancer Screening, Cancer Registry of Norway, Oslo University Hospital, Oslo, Norway
- Norwegian National Advisory Unit for Women's Health, Women's Clinic, Oslo University Hospital, Oslo, Norway
| | - Carlotta Sacerdote
- Piedmont Reference Centre for Epidemiology and Cancer Prevention (CPO Piemonte), Turin, 10126, Italy
| | - Fulvio Ricceri
- Epidemiology Unit, ASL TO3, Piedmont Region, Grugliasco, 10095, Italy
| | | | | | - Carlo La Vecchia
- Hellenic Health Foundation, Athens, Greece
- Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
| | - Kim Overvad
- Department of Public Health, Aarhus University, Aarhus, Denmark
- Department of Cardiology, Aalborg University Hospital, Aalborg, Denmark
| | | | - Anja Olsen
- Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Anne Tjønneland
- Danish Cancer Society Research Center, Copenhagen, Denmark
- Department of Public Health, University of Copenhagen, Copenhagen, Denmark
| | - Aurora Perez-Cornago
- Cancer Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, UK
| | - Paula Jakszyn
- Unit of Nutrition and Cancer, Cancer Epidemiology Research Programme, Catalan Institute of Oncology, ĹHospitallet de Llobregat, Barcelona, Spain
- Facultat de Ciències de la Salut Blanquerna, Universitat Ramón Llull, Barcelona, Spain
| | - Sara Grioni
- Epidemiology and Prevention Unit, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan, Italy
| | - Matthias B Schulze
- Department of Molecular Epidemiology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany
- Institute of Nutritional Sciences, University of Potsdam, Nuthetal, Germany
| | - Guri Skeie
- Department of Community Medicine, University of Tromsø, The Arctic University of Norway, Tromsø, Norway
| | - Cristina Lasheras
- Department of Functional Biology, University of Oviedo, Asturias, Spain
| | - Sandra Colorado-Yohar
- Department of Epidemiology, Murcia Regional Health Council, IMIB-Arrixaca, Murcia, Spain
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Research Group on Demography and Health, National Faculty of Public Health, University of Antioquia, Medellín, Colombia
| | - Miguel Rodríguez-Barranco
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Andalusian School of Public Health (EASP), Granada, Spain
- Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), Universidad de Granada, Granada, Spain
| | - Tilman Kühn
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Verena A Katzke
- Division of Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Pilar Amiano
- CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
- Public Health Division of Gipuzkoa, BioDonostia Research Institue, Donostia-San Sebastian, Spain
| | - Rosario Tumino
- Cancer Registry and Histopathology Department, Civic-M. P. Arezzo Hospital, ASP Ragusa, Ragusa, Italy
| | - Salvatore Panico
- Dipartimento di Medicina Clinica e Sperimentale, Federico II University, Naples, Italy
| | - Ana Ezponda
- Clínica Universidad de Navarra, Pamplona, Spain
| | - Emily Sonestedt
- Nutritional Epidemiology, Department of Clinical Sciences Malmö, Lund University, Malmö, Sweden
| | - Augustin Scalbert
- Biomarkers Group, International Agency for Research on Cancer, Lyon, France
| | - Elisabete Weiderpass
- International Agency for Research on Cancer, World Health Organization, Lyon, France
| | - Marie-Christine Boutron-Ruault
- CESP, Fac. de médecine - Univ. Paris-Sud, Fac. de médecine - UVSQ, INSERM, Université Paris Saclay, 94 805, Villejuif, France
- Inserm UMR1018, Gustave Roussy, 114 Rue Edouard Vaillant, F-94805, Villejuif, France
| | - Marina Kvaskoff
- CESP, Fac. de médecine - Univ. Paris-Sud, Fac. de médecine - UVSQ, INSERM, Université Paris Saclay, 94 805, Villejuif, France.
- Inserm UMR1018, Gustave Roussy, 114 Rue Edouard Vaillant, F-94805, Villejuif, France.
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13
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Kuzmin VA, Volnukhin VA, Egorov AE, Klimovich ON, Kostyukov AA, Nekipelova TD, Khodot EN, Shakhmatov VV, Shevelev AV, Shibaeva AB, Shtil AA. Furodihydroquinolines as Novel Photosensitizers for Photochemotherapy. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B 2020. [DOI: 10.1134/s199079311906023x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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Kemény L, Varga E, Novak Z. Advances in phototherapy for psoriasis and atopic dermatitis. Expert Rev Clin Immunol 2019; 15:1205-1214. [PMID: 31575297 DOI: 10.1080/1744666x.2020.1672537] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Introduction: Phototherapy has long been used for the treatment of inflammatory skin diseases, such as psoriasis and atopic dermatitis. The most frequent treatment approach utilizes ultraviolet (UV) light, however, recently, different lasers and low-level light therapies (LLLT) emitting wavelengths in the spectrum of the visible light have also been tried for the treatment of inflammatory skin diseases with variable success.Areas covered: This review provides an update on the different forms of phototherapy used for the treatment of psoriasis and atopic dermatitis. The proposed mechanism of action of the different phototherapeutical approaches are covered, including the immunosuppressive effect of UV light, the anti-inflammatory effect of vascular lasers and the LLLT induced photobiomodulation. The clinical efficacy of the different treatment options is also discussed.Expert opinion: Based on the efficacy and safety, NB-UVB represents the gold standard for treating psoriasis and atopic dermatitis. The UVB excimer laser and excimer lamp might be the best option for clearing localized therapy-resistant lesions. Home UV phototherapy systems might promote treatment adherence and better compliance of the patients. Vascular lasers, IPLs and LLLT, however, can not currently be recommended for the treatment of inflammatory skin diseases because of the lack of well-controlled studies.
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Affiliation(s)
- Lajos Kemény
- Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary.,MTA-SZTE Dermatological Research Group, University of Szeged, Szeged, Hungary.,HCEMM-USZ Skin Research Group, Szeged, Hungary
| | - Emese Varga
- Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary
| | - Zoltan Novak
- Department of Gynaecology, National Insitute of Oncology, Budapest, Hungary
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15
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Maiuri T, Suart CE, Hung CLK, Graham KJ, Barba Bazan CA, Truant R. DNA Damage Repair in Huntington's Disease and Other Neurodegenerative Diseases. Neurotherapeutics 2019; 16:948-956. [PMID: 31364066 PMCID: PMC6985310 DOI: 10.1007/s13311-019-00768-7] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Recent genome-wide association studies of Huntington's disease (HD) primarily highlighted genes involved in DNA damage repair mechanisms as modifiers of age at onset and disease severity, consistent with evidence that more DNA repair genes are being implicated in late age-onset neurodegenerative diseases. This provides an exciting opportunity to advance therapeutic development in HD, as these pathways have already been under intense investigation in cancer research. Also emerging are the roles of other polyglutamine disease proteins in DNA damage repair mechanisms. A potential universal trigger of oxidative DNA damage shared in these late age-onset diseases is the increase of reactive oxygen species (ROS) in human aging, defining an age-related mechanism that has defied other hypotheses of neurodegeneration. We discuss the potential commonality of DNA damage repair pathways in HD and other neurodegenerative diseases. Potential targets for therapy that may prove beneficial across many of these diseases are also identified, defining nodes in the ataxia telangiectasia-mutated (ATM) complex, mismatch repair, and poly ADP-ribose polymerases (PARPs).
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Affiliation(s)
- T Maiuri
- Department of Biochemistry and Biomedical Sciences, McMaster University, HSC 4N54, 1200 Main Street West, Hamilton, Ontario, L8N3Z5, Canada
| | - C E Suart
- Department of Biochemistry and Biomedical Sciences, McMaster University, HSC 4N54, 1200 Main Street West, Hamilton, Ontario, L8N3Z5, Canada
| | - C L K Hung
- Department of Biochemistry and Biomedical Sciences, McMaster University, HSC 4N54, 1200 Main Street West, Hamilton, Ontario, L8N3Z5, Canada
| | - K J Graham
- Department of Biochemistry and Biomedical Sciences, McMaster University, HSC 4N54, 1200 Main Street West, Hamilton, Ontario, L8N3Z5, Canada
| | - C A Barba Bazan
- Department of Biochemistry and Biomedical Sciences, McMaster University, HSC 4N54, 1200 Main Street West, Hamilton, Ontario, L8N3Z5, Canada
| | - R Truant
- Department of Biochemistry and Biomedical Sciences, McMaster University, HSC 4N54, 1200 Main Street West, Hamilton, Ontario, L8N3Z5, Canada.
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16
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Wu RA, Semlow DR, Kamimae-Lanning AN, Kochenova OV, Chistol G, Hodskinson MR, Amunugama R, Sparks JL, Wang M, Deng L, Mimoso CA, Low E, Patel KJ, Walter JC. TRAIP is a master regulator of DNA interstrand crosslink repair. Nature 2019; 567:267-272. [PMID: 30842657 PMCID: PMC6417926 DOI: 10.1038/s41586-019-1002-0] [Citation(s) in RCA: 122] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Accepted: 02/01/2019] [Indexed: 12/24/2022]
Abstract
Cells often use multiple pathways to repair the same DNA lesion, and the choice of pathway has substantial implications for the fidelity of genome maintenance. DNA interstrand crosslinks covalently link the two strands of DNA, and thereby block replication and transcription; the cytotoxicity of these crosslinks is exploited for chemotherapy. In Xenopus egg extracts, the collision of replication forks with interstrand crosslinks initiates two distinct repair pathways. NEIL3 glycosylase can cleave the crosslink1; however, if this fails, Fanconi anaemia proteins incise the phosphodiester backbone that surrounds the interstrand crosslink, generating a double-strand-break intermediate that is repaired by homologous recombination2. It is not known how the simpler NEIL3 pathway is prioritized over the Fanconi anaemia pathway, which can cause genomic rearrangements. Here we show that the E3 ubiquitin ligase TRAIP is required for both pathways. When two replisomes converge at an interstrand crosslink, TRAIP ubiquitylates the replicative DNA helicase CMG (the complex of CDC45, MCM2-7 and GINS). Short ubiquitin chains recruit NEIL3 through direct binding, whereas longer chains are required for the unloading of CMG by the p97 ATPase, which enables the Fanconi anaemia pathway. Thus, TRAIP controls the choice between the two known pathways of replication-coupled interstrand-crosslink repair. These results, together with our other recent findings3,4 establish TRAIP as a master regulator of CMG unloading and the response of the replisome to obstacles.
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Affiliation(s)
- R Alex Wu
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA
| | - Daniel R Semlow
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA
| | | | - Olga V Kochenova
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA
| | - Gheorghe Chistol
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA
| | | | - Ravindra Amunugama
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA
| | - Justin L Sparks
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA
| | - Meng Wang
- MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Cambridge, UK
- Department of Haematology, University of Cambridge, Cambridge, UK
| | - Lin Deng
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
- Department of Cell Biology, Harvard Medical School, Boston, MA, USA
| | - Claudia A Mimoso
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA
| | - Emily Low
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA
| | - Ketan J Patel
- MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Cambridge, UK
- Department of Medicine, University of Cambridge, Addenbrooke's Hospital, Cambridge, UK
| | - Johannes C Walter
- Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA, USA.
- Howard Hughes Medical Institute, Boston, MA, USA.
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17
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Dietary furocoumarins and skin cancer: A review of current biological evidence. Food Chem Toxicol 2018; 122:163-171. [DOI: 10.1016/j.fct.2018.10.027] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Revised: 08/21/2018] [Accepted: 10/10/2018] [Indexed: 11/21/2022]
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Govindarajan SR, Jain T, Choi JW, Joy A, Isayeva I, Vorvolakos K. A hydrophilic coumarin-based polyester for ambient-temperature initiator-free 3D printing: Chemistry, rheology and interface formation. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.06.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Chen HJC, Chang YL, Teng YC, Hsiao CF, Lin TS. A Stable Isotope Dilution Nanoflow Liquid Chromatography Tandem Mass Spectrometry Assay for the Simultaneous Detection and Quantification of Glyoxal-Induced DNA Cross-Linked Adducts in Leukocytes from Diabetic Patients. Anal Chem 2017; 89:13082-13088. [PMID: 29172486 DOI: 10.1021/acs.analchem.6b04296] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Glyoxal (gx) is a bifunctional electrophile capable of cross-linking DNA. Although it is present in foods and from the environment, endogenous formation of glyoxal occurs through metabolism of carbohydrates and oxidation of lipids and nucleic acids. Plasma concentrations of glyoxal are elevated in in diabetes mellitus patients compared to nondiabetics. The most abundant 2'-deoxyribonucleoside adducts cross-linked by glyoxal are dG-gx-dC, dG-gx-dA, and dG-gx-dG. These DNA cross-links can be mutagenic by damaging the integrity of the DNA structure. Herein, we developed a highly sensitive and specific assay for the simultaneous detection and quantification of the dG-gx-dC and dG-gx-dA cross-links based on stable isotope dilution (SID) nanoflow liquid chromatography nanospray ionization tandem mass spectrometry (nanoLC-NSI/MS/MS) under the highly selected reaction monitoring mode and using a triple quadrupole mass spectrometer. The entire assay procedure involved addition of the stable isotope standards [15N5]dG-gx-dC and [15N5]dG-gx-dA as internal standards, enzyme hydrolysis to release the cross-links as nucleosides, enrichment by a reversed-phase solid-phase extraction column, and nanoLC-NSI/MS/MS analysis. The detection limit is 0.19 amol for dG-gx-dC and 0.89 amol for dG-gx-dA, which is 400 and 80 times more sensitive, respectively, than capillary LC-NSI/MS/MS assay of these adducts. The lower limit of quantification was 94 and 90 amol for dG-gx-dC and dG-gx-dA, respectively, which is equivalent to 0.056 and 0.065 adducts in 108 normal nucleotides in 50 μg of DNA. In type 2 diabetes mellitus (T2DM) patients (n = 38), the levels of dG-gx-dC and dG-gx-dA in leukocyte DNA were 1.94 ± 1.20 and 2.10 ± 1.77 in 108 normal nucleotides, respectively, which were significantly higher than those in nondiabetics (n = 39: 0.83 ± 0.92 and 1.05 ± 0.99 in 108 normal nucleotides, respectively). Excluding the factor of smoking, an exogenous source of glyoxal, levels of these two cross-linked adducts were found to be significantly higher in nonsmoking T2DM patients than in nonsmoking control subjects. Furthermore, the levels of dG-gx-dC and dG-gx-dA correlated with HbA1c with statistical significance. To our best knowledge, this is the first report of the identification and quantification of glyoxal-derived cross-linked DNA adducts in human leukocyte DNA and their association with T2DM. This SID nanoLC-NSI/MS/MS assay is highly sensitive and specific and it requires only 50 μg of leukocyte DNA isolated from 2-3 mL of blood to accurately quantify these two cross-linked adducts simultaneously. Our assay thus provides a useful biomarker for the evaluation of glyoxal-derived DNA damage.
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Affiliation(s)
- Hauh-Jyun Candy Chen
- Department of Chemistry and Biochemistry, National Chung Cheng University , 168 University Road, Ming-Hsiung, Chia-Yi 62102, Taiwan
| | - Ya-Lang Chang
- Department of Chemistry and Biochemistry, National Chung Cheng University , 168 University Road, Ming-Hsiung, Chia-Yi 62102, Taiwan
| | - Yi-Chun Teng
- Department of Chemistry and Biochemistry, National Chung Cheng University , 168 University Road, Ming-Hsiung, Chia-Yi 62102, Taiwan
| | - Chiung-Fong Hsiao
- Department of Chemistry and Biochemistry, National Chung Cheng University , 168 University Road, Ming-Hsiung, Chia-Yi 62102, Taiwan
| | - Tsai-Shiuan Lin
- Department of Chemistry and Biochemistry, National Chung Cheng University , 168 University Road, Ming-Hsiung, Chia-Yi 62102, Taiwan
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20
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Chaowattanapanit S, Choonhakarn C, Foocharoen C, Julanon N. Phototherapy in systemic sclerosis: Review. PHOTODERMATOLOGY PHOTOIMMUNOLOGY & PHOTOMEDICINE 2017; 33:296-305. [PMID: 28703365 DOI: 10.1111/phpp.12331] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/06/2017] [Indexed: 12/16/2022]
Abstract
Systemic scleroderma-also known as systemic sclerosis (SSc)-is a chronic systemic connective tissue disease characterized by collagen deposition in cutaneous and internal organs, leading to skin sclerosis and multiple organ fibrosis. The pathogenesis is complex and remains poorly understood. Treatment is based on organ involvement and requires a multidisciplinary approach. Skin sclerosis can cause disability, leading to decreasing quality of life. Various systemic antifibrotic therapies have been used; however, most have unsatisfactory results. Recently, phototherapy and in particular ultraviolet A (UVA) has been used to treat skin sclerosis in SSc patients with satisfactory results. The main mechanisms include lymphocyte apoptosis, cytokine alteration, inhibition of collagen synthesis and increased collagenase production, and neovascularization, leading to the breakdown of collagen fibrils resulting in skin softening or even healing digital ulcers. Most studies reported that psoralen plus UVA (PUVA) and UVA1 phototherapy improved clinical outcomes vis-à-vis skin sclerosis, joint mobility, ulcers, and histopathology. PUVA and UVA1 phototherapy therefore have potential as an alternative or adjunctive therapy for patients with SSc.
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Affiliation(s)
| | - Charoen Choonhakarn
- Division of Dermatology, Department of Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Chingching Foocharoen
- Division of Allergy-Immunology-Rheumatology, Department of Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Narachai Julanon
- Division of Dermatology, Department of Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
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21
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Liszewski W, Naym DG, Biskup E, Gniadecki R. Psoralen with ultraviolet A-induced apoptosis of cutaneous lymphoma cell lines is augmented by type I interferons via the JAK1-STAT1 pathway. PHOTODERMATOLOGY PHOTOIMMUNOLOGY & PHOTOMEDICINE 2017; 33:164-171. [DOI: 10.1111/phpp.12302] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 02/06/2017] [Indexed: 12/12/2022]
Affiliation(s)
- Walter Liszewski
- Department of Dermatology; Bispebjerg Hospital; Copenhagen Denmark
| | - David Gram Naym
- Department of Dermatology; Bispebjerg Hospital; Copenhagen Denmark
| | - Edyta Biskup
- Department of Dermatology; Bispebjerg Hospital; Copenhagen Denmark
| | - Robert Gniadecki
- Department of Dermatology; Bispebjerg Hospital; Copenhagen Denmark
- Faculty of Health Sciences; University of Copenhagen; Copenhagen Denmark
- Division of Dermatology; University of Alberta; Edmonton AB Canada
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22
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Mukherjee A, Vasquez KM. Tools to Study the Role of Architectural Protein HMGB1 in the Processing of Helix Distorting, Site-specific DNA Interstrand Crosslinks. J Vis Exp 2016. [PMID: 27911399 DOI: 10.3791/54678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
High mobility group box 1 (HMGB1) protein is a non-histone architectural protein that is involved in regulating many important functions in the genome, such as transcription, DNA replication, and DNA repair. HMGB1 binds to structurally distorted DNA with higher affinity than to canonical B-DNA. For example, we found that HMGB1 binds to DNA interstrand crosslinks (ICLs), which covalently link the two strands of the DNA, cause distortion of the helix, and if left unrepaired can cause cell death. Due to their cytotoxic potential, several ICL-inducing agents are currently used as chemotherapeutic agents in the clinic. While ICL-forming agents show preferences for certain base sequences (e.g., 5'-TA-3' is the preferred crosslinking site for psoralen), they largely induce DNA damage in an indiscriminate fashion. However, by covalently coupling the ICL-inducing agent to a triplex-forming oligonucleotide (TFO), which binds to DNA in a sequence-specific manner, targeted DNA damage can be achieved. Here, we use a TFO covalently conjugated on the 5' end to a 4'-hydroxymethyl-4,5',8-trimethylpsoralen (HMT) psoralen to generate a site-specific ICL on a mutation-reporter plasmid to use as a tool to study the architectural modification, processing, and repair of complex DNA lesions by HMGB1 in human cells. We describe experimental techniques to prepare TFO-directed ICLs on reporter plasmids, and to interrogate the association of HMGB1 with the TFO-directed ICLs in a cellular context using chromatin immunoprecipitation assays. In addition, we describe DNA supercoiling assays to assess specific architectural modification of the damaged DNA by measuring the amount of superhelical turns introduced on the psoralen-crosslinked plasmid by HMGB1. These techniques can be used to study the roles of other proteins involved in the processing and repair of TFO-directed ICLs or other targeted DNA damage in any cell line of interest.
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Affiliation(s)
- Anirban Mukherjee
- Division of Pharmacology and Toxicology, College of Pharmacy, The University of Texas at Austin
| | - Karen M Vasquez
- Division of Pharmacology and Toxicology, College of Pharmacy, The University of Texas at Austin;
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Biskup E, Naym DG, Gniadecki R. Small-molecule inhibitors of Ataxia Telangiectasia and Rad3 related kinase (ATR) sensitize lymphoma cells to UVA radiation. J Dermatol Sci 2016; 84:239-247. [PMID: 27743911 DOI: 10.1016/j.jdermsci.2016.09.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 08/19/2016] [Accepted: 09/16/2016] [Indexed: 12/27/2022]
Abstract
BACKGROUND Psoralen plus ultraviolet A (PUVA) photochemotherapy is a combination treatment used for inflammatory and neoplastic skin diseases such as mycosis fungoides (MF), the most common type of cutaneous T-cell lymphoma (CTCL). However, 30% of MF patients do not respond sufficiently to PUVA and require more aggressive therapies. OBJECTIVE The aim of this project was to investigate whether inhibition of Ataxia Telangiectasia and Rad3 related kinase (ATR) may enhance efficacy of phototherapy. METHODS CTCL cell lines (MyLa2000, SeAx and Mac2a) served as in vitro cell models. ATR and Chk1 were inhibited by small molecule antagonists VE-821, VE-822 or Chir-124, or by small interfering RNAs (siRNAs). Cell cycle and viability were assessed by flow cytometry. RESULTS Small molecule inhibitors of ATR and Chk1 potently sensitized all cell lines to PUVA and, importantly, also to UVA, which by itself did not cause apoptotic response. VE-821/2 blocked ATR pathway activation and released the cells from the G2/M block caused by UVA and PUVA, but did not affect apoptosis caused by other chemotherapeutics (etoposide, gemcitabine, doxorubicine) or by hydrogen peroxide. Knockdown of ATR and Chk1 with siRNA also blocked the ATR pathway and released the cells from G2/M block but did not sensitize the cells to UVA as observed with the small molecule inhibitors. The latter suggested that the synergism between VE-821/2 or Chir-124 and UVA was not solely caused by specific blocking of ATR kinase but also ATR-independent photosensitization. This hypothesis was further verified by administrating VE-821/2 or Chir-124 before and after UVA irradiation, as well as comparing their activity with other ATR and Chk1 inhibitors (AZD6738 and MK8776). We found that only VE-821/2 and Chir-124 kinase inhibitors had synergistic effect with UVA, and only if applied before treatment with UVA. CONCLUSION Small molecule ATR and Chk1 inhibitors potently sensitize lymphoma cells to UVA radiation and induce a prominent apoptotic response. Interestingly, this effect is due to the dual (kinase inhibiting and photosensitizing) mode of action of these compounds.
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Affiliation(s)
- Edyta Biskup
- Department of Dermatology, Bispebjerg Hospital, Copenhagen, Denmark.
| | - David Gram Naym
- Department of Dermatology, Bispebjerg Hospital, Copenhagen, Denmark
| | - Robert Gniadecki
- Department of Dermatology, Bispebjerg Hospital, Copenhagen, Denmark; Faculty of Health Sciences, University of Copenhagen, Denmark; Division of Dermatology, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Canada
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Kamkaew A, Chen F, Zhan Y, Majewski RL, Cai W. Scintillating Nanoparticles as Energy Mediators for Enhanced Photodynamic Therapy. ACS NANO 2016; 10:3918-35. [PMID: 27043181 PMCID: PMC4846476 DOI: 10.1021/acsnano.6b01401] [Citation(s) in RCA: 226] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/14/2023]
Abstract
Achieving effective treatment of deep-seated tumors is a major challenge for traditional photodynamic therapy (PDT) due to difficulties in delivering light into the subsurface. Thanks to their great tissue penetration, X-rays hold the potential to become an ideal excitation source for activating photosensitizers (PS) that accumulate in deep tumor tissue. Recently, a wide variety of nanoparticles have been developed for this purpose. The nanoparticles are designed as carriers for loading various kinds of PSs and can facilitate the activation process by transferring energy harvested from X-ray irradiation to the loaded PS. In this review, we focus on recent developments of nanoscintillators with high energy transfer efficiency, their rational designs, as well as potential applications in next-generation PDT. Treatment of deep-seated tumors by using radioisotopes as an internal light source will also be discussed.
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Affiliation(s)
- Anyanee Kamkaew
- Department of Radiology, University of Wisconsin - Madison, Wisconsin 53705, United States
| | - Feng Chen
- Department of Radiology, University of Wisconsin - Madison, Wisconsin 53705, United States
- Corresponding Author: Feng Chen: ; Weibo Cai:
| | - Yonghua Zhan
- Department of Radiology, University of Wisconsin - Madison, Wisconsin 53705, United States
- Engineering Research Center of Molecular and Neuro Imaging of the Ministry of Education & School of Life Science and Technology, Xidian University, Xi’an, Shaanxi 710071, China
| | - Rebecca L. Majewski
- Department of Biomedical Engineering, University of Wisconsin - Madison, Wisconsin 53705, United States
| | - Weibo Cai
- Department of Radiology, University of Wisconsin - Madison, Wisconsin 53705, United States
- Department of Medical Physics, University of Wisconsin - Madison, Wisconsin 53705, United States
- University of Wisconsin Carbone Cancer Center, Madison, Wisconsin 53705, United States
- Corresponding Author: Feng Chen: ; Weibo Cai:
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25
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Monteforte R, Beilhack GF, Grausenburger R, Mayerhofer B, Bittner R, Grillari‐Voglauer R, Sibilia M, Dellago H, Tschachler E, Gruber F, Grillari J. SNEV(Prp19/PSO4) deficiency increases PUVA-induced senescence in mouse skin. Exp Dermatol 2016; 25:212-7. [PMID: 26663487 PMCID: PMC4832318 DOI: 10.1111/exd.12910] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/30/2015] [Indexed: 12/14/2022]
Abstract
Senescent cells accumulate during ageing in various tissues and contribute to organismal ageing. However, factors that are involved in the induction of senescence in vivo are still not well understood. SNEV(P) (rp19/) (PSO) (4) is a multifaceted protein, known to be involved in DNA damage repair and senescence, albeit only in vitro. In this study, we used heterozygous SNEV(+/-) mice (SNEV-knockout results in early embryonic lethality) and wild-type littermate controls as a model to elucidate the role of SNEV(P) (rp19/) (PSO) (4) in DNA damage repair and senescence in vivo. We performed PUVA treatment as model system for potently inducing cellular senescence, consisting of 8-methoxypsoralen in combination with UVA on mouse skin to induce DNA damage and premature skin ageing. We show that SNEV(P) (rp19/) (PSO) (4) expression decreases during organismal ageing, while p16, a marker of ageing in vivo, increases. In response to PUVA treatment, we observed in the skin of both SNEV(P) (rp19/) (PSO) (4) and wild-type mice an increase in γ-H2AX levels, a DNA damage marker. In old SNEV(P) (rp19/) (PSO) (4) mice, this increase is accompanied by reduced epidermis thickening and increase in p16 and collagenase levels. Thus, the DNA damage response occurring in the mouse skin upon PUVA treatment is dependent on SNEV(P) (rp19/) (PSO) (4) expression and lower levels of SNEV(P) (rp19/) (PSO) (4) , as in old SNEV(+/-) mice, result in increase in cellular senescence and acceleration of premature skin ageing.
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Affiliation(s)
- Rossella Monteforte
- Department of BiotechnologyUniversity of Natural Resources and Applied Life SciencesViennaAustria
- Christian Doppler Laboratory on Biotechnology of Skin AgingViennaAustria
| | - Georg F. Beilhack
- Division of Nephrology & DialysisInternal Medicine IIIMedical University of ViennaViennaAustria
| | - Reinhard Grausenburger
- Department of BiotechnologyUniversity of Natural Resources and Applied Life SciencesViennaAustria
- Christian Doppler Laboratory on Biotechnology of Skin AgingViennaAustria
| | - Benjamin Mayerhofer
- Neuromuscular Research DepartmentCenter of Anatomy & Cell BiologyMedical University of ViennaViennaAustria
| | - Reginald Bittner
- Neuromuscular Research DepartmentCenter of Anatomy & Cell BiologyMedical University of ViennaViennaAustria
| | - Regina Grillari‐Voglauer
- Department of BiotechnologyUniversity of Natural Resources and Applied Life SciencesViennaAustria
- Evercyte GmbHViennaAustria
| | - Maria Sibilia
- Institute for Cancer ResearchMedical University of ViennaViennaAustria
| | - Hanna Dellago
- Department of BiotechnologyUniversity of Natural Resources and Applied Life SciencesViennaAustria
- Christian Doppler Laboratory on Biotechnology of Skin AgingViennaAustria
| | - Erwin Tschachler
- Department of DermatologyMedical University of ViennaViennaAustria
| | - Florian Gruber
- Christian Doppler Laboratory on Biotechnology of Skin AgingViennaAustria
- Department of DermatologyMedical University of ViennaViennaAustria
| | - Johannes Grillari
- Department of BiotechnologyUniversity of Natural Resources and Applied Life SciencesViennaAustria
- Christian Doppler Laboratory on Biotechnology of Skin AgingViennaAustria
- Evercyte GmbHViennaAustria
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26
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Price N, Johnson KM, Wang J, Fekry MI, Wang Y, Gates KS. Interstrand DNA-DNA cross-link formation between adenine residues and abasic sites in duplex DNA. J Am Chem Soc 2014; 136:3483-90. [PMID: 24506784 PMCID: PMC3954461 DOI: 10.1021/ja410969x] [Citation(s) in RCA: 100] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2013] [Indexed: 01/28/2023]
Abstract
The loss of a coding nucleobase from the structure of DNA is a common event that generates an abasic (Ap) site (1). Ap sites exist as an equilibrating mixture of a cyclic hemiacetal and a ring-opened aldehyde. Aldehydes are electrophilic functional groups that can form covalent adducts with nucleophilic sites in DNA. Thus, Ap sites present a potentially reactive aldehyde as part of the internal structure of DNA. Here we report evidence that the aldehyde group of Ap sites in duplex DNA can form a covalent adduct with the N(6)-amino group of adenine residues on the opposing strand. The resulting interstrand DNA-DNA cross-link occurs at 5'-ApT/5'-AA sequences in remarkably high yields (15-70%) under physiologically relevant conditions. This naturally occurring DNA-templated reaction has the potential to generate cross-links in the genetic material of living cells.
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Affiliation(s)
- Nathan
E. Price
- Department of Chemistry and Department of Biochemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Kevin M. Johnson
- Department of Chemistry and Department of Biochemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Jin Wang
- Department
of Chemistry, University of California-Riverside, Riverside, California 92521-0403, United States
| | - Mostafa I. Fekry
- Department of Chemistry and Department of Biochemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Yinsheng Wang
- Department
of Chemistry, University of California-Riverside, Riverside, California 92521-0403, United States
| | - Kent S. Gates
- Department of Chemistry and Department of Biochemistry, University of Missouri, Columbia, Missouri 65211, United States
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27
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Maddipatla MVSN, Wehrung D, Tang C, Fan W, Oyewumi MO, Miyoshi T, Joy A. Photoresponsive Coumarin Polyesters That Exhibit Cross-Linking and Chain Scission Properties. Macromolecules 2013. [DOI: 10.1021/ma400584y] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
| | - Daniel Wehrung
- College of Pharmacy, Northeast Ohio Medical University, Rootstown, Ohio
44272, United States
| | - Chuan Tang
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325, United
States
| | - Weizheng Fan
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325, United
States
| | - Moses O. Oyewumi
- College of Pharmacy, Northeast Ohio Medical University, Rootstown, Ohio
44272, United States
| | - Toshikazu Miyoshi
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325, United
States
| | - Abraham Joy
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325, United
States
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28
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Rajendran A, Endo M, Katsuda Y, Hidaka K, Sugiyama H. Photo-Cross-Linking-Assisted Thermal Stability of DNA Origami Structures and Its Application for Higher-Temperature Self-Assembly. J Am Chem Soc 2011; 133:14488-91. [DOI: 10.1021/ja204546h] [Citation(s) in RCA: 152] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Arivazhagan Rajendran
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
- CREST, Japan Science and Technology Corporation (JST), Sanbancho, Chiyoda-ku, Tokyo 102-0075, Japan
| | - Masayuki Endo
- CREST, Japan Science and Technology Corporation (JST), Sanbancho, Chiyoda-ku, Tokyo 102-0075, Japan
- Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Yoshida-ushinomiyacho, Sakyo-ku, Kyoto 606-8501, Japan
| | - Yousuke Katsuda
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Kumi Hidaka
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Hiroshi Sugiyama
- Department of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa-oiwakecho, Sakyo-ku, Kyoto 606-8502, Japan
- CREST, Japan Science and Technology Corporation (JST), Sanbancho, Chiyoda-ku, Tokyo 102-0075, Japan
- Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Yoshida-ushinomiyacho, Sakyo-ku, Kyoto 606-8501, Japan
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29
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Ljungman M. The DNA damage response--repair or despair? ENVIRONMENTAL AND MOLECULAR MUTAGENESIS 2010; 51:879-889. [PMID: 20818630 DOI: 10.1002/em.20597] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The term "the DNA damage response" (DDR) encompasses a sophisticated array of cellular initiatives set in motion as cells are exposed to DNA-damaging events. It has been known for over half a century that all organisms have the ability to restore genomic integrity through DNA repair. More recent discoveries of signal transduction pathways linking DNA damage to cell cycle arrest and apoptosis have greatly expanded our views of how cells and tissues limit mutagenesis and tumorigenesis. DNA repair not only plays a pivotal role in suppressing mutagenesis but also in the reversal of signals inducing the stress response. If repair is faulty or the cell is overwhelmed by damage, chances are that the cell will despair and be removed by apoptosis. This final fate is determined by intricate cellular dosimeters that are yet to be fully understood. Here, key findings leading to our current view of DDR are discussed as well as potential areas of importance for future studies.
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Affiliation(s)
- Mats Ljungman
- Division of Radiation and Cancer Biology, Department of Radiation Oncology, University of Michigan Comprehensive Cancer Center, Ann Arbor, Michigan 48109, USA.
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30
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van de Vrugt HJ, Eaton L, Hanlon Newell A, Al-Dhalimy M, Liskay RM, Olson SB, Grompe M. Embryonic lethality after combined inactivation of Fancd2 and Mlh1 in mice. Cancer Res 2010; 69:9431-8. [PMID: 19934329 DOI: 10.1158/0008-5472.can-09-2452] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
DNA repair defects are frequently encountered in human cancers. These defects are utilized by traditional therapeutics but also offer novel cancer treatment strategies based on synthetic lethality. To determine the consequences of combined Fanconi anemia (FA) and mismatch repair pathway inactivation, defects in Fancd2 and Mlh1 were combined in one mouse model. Fancd2/Mlh1 double-mutant embryos displayed growth retardation resulting in embryonic lethality and significant underrepresentation among progeny. Additional inactivation of Trp53 failed to improve the survival of Fancd2/Mlh1-deficient embryos. Mouse fibroblasts were obtained and challenged with cross-linking agents. Fancd2-deficient cells displayed the FA-characteristic growth inhibition after mitomycin C (MMC) exposure. In primary fibroblasts, the absence of Mlh1 did not greatly affect the MMC sensitivity of Fancd2-deficient and Fancd2-proficient cells. However, in Trp53 mutant immortalized fibroblasts, Mlh1 deficiency reduced the growth-inhibiting effect of MMC in Fancd2 mutant and complemented cells. Similar data were obtained using psoralen/UVA, signifying that MLH1 influences the cellular sensitivity to DNA interstrand cross-links. Next, the effect of MLH1 deficiency on the formation of chromosomal aberrations in response to cross-linking agents was determined. Surprisingly, Mlh1 mutant fibroblasts displayed a modest but noticeable decrease in induced chromosomal breakage and interchange frequencies, suggesting that MLH1 promotes interstrand cross-link repair catastrophe. In conclusion, the combined inactivation of Fancd2 and Mlh1 did not result in synthetic lethality at the cellular level. Although the absence of Fancd2 sensitized Mlh1/Trp53 mutant fibroblasts to MMC, the differential survival of primary and immortalized fibroblasts advocates against systemic inactivation of FANCD2 to enhance treatment of MLH1-deficient tumors.
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Affiliation(s)
- Henri J van de Vrugt
- Oregon Stem Cell Center, Oregon Health and Science University, Portland, Oregon, USA.
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31
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Muniandy PA, Thapa D, Thazhathveetil AK, Liu ST, Seidman MM. Repair of laser-localized DNA interstrand cross-links in G1 phase mammalian cells. J Biol Chem 2009; 284:27908-27917. [PMID: 19684342 DOI: 10.1074/jbc.m109.029025] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Interstrand cross-links (ICLs) are absolute blocks to transcription and replication and can provoke genomic instability and cell death. Studies in bacteria define a two-stage repair scheme, the first involving recognition and incision on either side of the cross-link on one strand (unhooking), followed by recombinational repair or lesion bypass synthesis. The resultant monoadduct is removed in a second stage by nucleotide excision repair. In mammalian cells, there are multiple, but poorly defined, pathways, with much current attention on repair in S phase. However, many questions remain, including the efficiency of repair in the absence of replication, the factors involved in cross-link recognition, and the timing and demarcation of the first and second repair cycles. We have followed the repair of laser-localized lesions formed by psoralen (cross-links/monoadducts) and angelicin (only monoadducts) in mammalian cells. Both were repaired in G(1) phase by nucleotide excision repair-dependent pathways. Removal of psoralen adducts was blocked in XPC-deficient cells but occurred with wild type kinetics in cells deficient in DDB2 protein (XPE). XPC protein was rapidly recruited to psoralen adducts. However, accumulation of DDB2 was slow and XPC-dependent. Inhibition of repair DNA synthesis did not interfere with DDB2 recruitment to angelicin but eliminated recruitment to psoralen. Our results demonstrate an efficient ICL repair pathway in G(1) phase cells dependent on XPC, with entry of DDB2 only after repair synthesis that completes the first repair cycle. DDB2 accumulation at sites of cross-link repair is a marker for the start of the second repair cycle.
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Affiliation(s)
- Parameswary A Muniandy
- Laboratory of Molecular Gerontology, NIA, National Institutes of Health, Baltimore, Maryland 21224
| | - Dennis Thapa
- Laboratory of Molecular Gerontology, NIA, National Institutes of Health, Baltimore, Maryland 21224
| | | | | | - Michael M Seidman
- Laboratory of Molecular Gerontology, NIA, National Institutes of Health, Baltimore, Maryland 21224.
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