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Bertrand JU, Petit V, Aktary Z, de la Grange P, Elkoshi N, Sohier P, Delmas V, Levy C, Larue L. Loss of Dicer in Newborn Melanocytes Leads to Premature Hair Graying and Changes in Integrin Expression. J Invest Dermatol 2024; 144:601-611. [PMID: 37739336 DOI: 10.1016/j.jid.2023.08.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2023] [Revised: 08/29/2023] [Accepted: 08/30/2023] [Indexed: 09/24/2023]
Abstract
Premature hair graying occurs owing to the depletion of melanocyte stem cells in the hair follicle, which can be accelerated by stress caused by genetic or environmental factors. However, the connection between stress and melanocyte stem cell loss is not fully understood. MicroRNAs are molecules that control gene expression by regulating mRNA stability and translation and are produced by the enzyme Dicer, which is repressed under stress. In this study, using 2 mouse genetic models and human and mouse cell lines, we found that the inactivation of Dicer in melanocytes leads to misplacement of these cells within the hair follicle, resulting in a lack of melanin transfer to keratinocytes in the growing hair and the exhaustion of the melanocyte stem cell pool. We also show that miR-92b, which regulates ItgaV mRNA and protein levels, plays a role in altering melanocyte migration. Overall, our findings suggest that the Dicer-miR92b-ItgaV pathway serves as a major signaling pathway linking stress to premature hair greying.
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Affiliation(s)
- Juliette U Bertrand
- INSERM U1021, Normal and Pathological Development of Melanocytes, Institut Curie, PSL Research University, Orsay, France; Centre National de la Recherche Scientifique (CNRS) UMR 3347, Univ Paris-Sud, Univ Paris-Saclay, Orsay, France
| | - Valérie Petit
- INSERM U1021, Normal and Pathological Development of Melanocytes, Institut Curie, PSL Research University, Orsay, France; Centre National de la Recherche Scientifique (CNRS) UMR 3347, Univ Paris-Sud, Univ Paris-Saclay, Orsay, France
| | - Zackie Aktary
- INSERM U1021, Normal and Pathological Development of Melanocytes, Institut Curie, PSL Research University, Orsay, France; Centre National de la Recherche Scientifique (CNRS) UMR 3347, Univ Paris-Sud, Univ Paris-Saclay, Orsay, France
| | | | - Nadav Elkoshi
- Department of Human Genetics and Biochemistry, Sackler School of Medicine, Tel Aviv University, Tel-Aviv, Israel
| | - Pierre Sohier
- INSERM U1021, Normal and Pathological Development of Melanocytes, Institut Curie, PSL Research University, Orsay, France; Centre National de la Recherche Scientifique (CNRS) UMR 3347, Univ Paris-Sud, Univ Paris-Saclay, Orsay, France
| | - Véronique Delmas
- INSERM U1021, Normal and Pathological Development of Melanocytes, Institut Curie, PSL Research University, Orsay, France; Centre National de la Recherche Scientifique (CNRS) UMR 3347, Univ Paris-Sud, Univ Paris-Saclay, Orsay, France
| | - Carmit Levy
- Department of Human Genetics and Biochemistry, Sackler School of Medicine, Tel Aviv University, Tel-Aviv, Israel
| | - Lionel Larue
- INSERM U1021, Normal and Pathological Development of Melanocytes, Institut Curie, PSL Research University, Orsay, France; Centre National de la Recherche Scientifique (CNRS) UMR 3347, Univ Paris-Sud, Univ Paris-Saclay, Orsay, France.
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Parikh R, Parikh S, Hemi R, Elkoshi N, Gepner Y, Levy C, Percik R. Seasonal AMH variability implies a positive effect of UV exposure on the deterioration of ovarian follicles. Steroids 2023; 200:109307. [PMID: 37648009 DOI: 10.1016/j.steroids.2023.109307] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/24/2023] [Accepted: 08/27/2023] [Indexed: 09/01/2023]
Abstract
Anti-Müllerian hormone (AMH) is produced exclusively by granulosa cells of ovarian follicles and is an indicator of ovarian reserve which declines with age. Seasonality in AMH levels have been reported to be correlated with variations in Vitamin D levels, which is dependent on sunlight exposure. However, the effects of age and its association with solar radiation intensity with respect to AMH was never studied before. In this study, we investigated the relationship between AMH levels with season and with solar radiation intensity in a cohort of 2235 women aged 19-40 years undergoing hormonal work-up over a four-year period. Our findings revealed that among women aged 20-29 years, there was no significant association between AMH levels and either season or solar radiation intensity. However, for women aged 30-40 years, a seasonal pattern was observed, with higher AMH levels during spring and autumn months characterized by moderate solar radiation intensity. Women in their declining ovarian reserve age were found to be more sensitive to the effects of moderate solar radiation. Moderate solar radiation exposure positively impacted AMH levels, whereas low and high intensity exposure had a negative effect. Our findings indicate that age and solar radiation intensity must be considered when assessing AMH levels and provide valuable insights into the intricate relationship between AMH, seasonality, and UVB exposure in the context of reproductive health.
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Affiliation(s)
- Roma Parikh
- Department of Human Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Shivang Parikh
- Department of Human Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Rina Hemi
- Institute of Endocrinology, Chaim Sheba Medical Center, Tel-Hashomer 5262000, Israel
| | - Nadav Elkoshi
- Department of Human Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Yftach Gepner
- School of Public Health, Sackler Faculty of Medicine and Sylvan Adams Sports Institute, Tel Aviv University, Tel Aviv 69978, Israel
| | - Carmit Levy
- Department of Human Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Ruth Percik
- Institute of Endocrinology, Chaim Sheba Medical Center, Tel-Hashomer 5262000, Israel; Sackler School of Medicine, Tel Aviv University, Tel Aviv 69978, Israel.
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Elkoshi N, Parikh S, Malcov-Brog H, Parikh R, Manich P, Netti F, Maliah A, Elkoshi H, Haj M, Rippin I, Frand J, Perluk T, Haiat-Factor R, Golan T, Regev-Rudzki N, Kiper E, Brenner R, Gonen P, Dror I, Levi H, Hameiri O, Cohen-Gulkar M, Eldar-Finkelman H, Ast G, Nizri E, Ziv Y, Elkon R, Khaled M, Ebenstein Y, Shiloh Y, Levy C. Ataxia Telangiectasia Mutated Signaling Delays Skin Pigmentation upon UV Exposure by Mediating MITF Function toward DNA Repair Mode. J Invest Dermatol 2023; 143:2494-2506.e4. [PMID: 37236596 DOI: 10.1016/j.jid.2023.03.1686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 02/24/2023] [Accepted: 03/02/2023] [Indexed: 05/28/2023]
Abstract
Skin pigmentation is paused after sun exposure; however, the mechanism behind this pausing is unknown. In this study, we found that the UVB-induced DNA repair system, led by the ataxia telangiectasia mutated (ATM) protein kinase, represses MITF transcriptional activity of pigmentation genes while placing MITF in DNA repair mode, thus directly inhibiting pigment production. Phosphoproteomics analysis revealed ATM to be the most significantly enriched pathway among all UVB-induced DNA repair systems. ATM inhibition in mouse or human skin, either genetically or chemically, induces pigmentation. Upon UVB exposure, MITF transcriptional activation is blocked owing to ATM-dependent phosphorylation of MITF on S414, which modifies MITF activity and interactome toward DNA repair, including binding to TRIM28 and RBBP4. Accordingly, MITF genome occupancy is enriched in sites of high DNA damage that are likely repaired. This suggests that ATM harnesses the pigmentation key activator for the necessary rapid, efficient DNA repair, thus optimizing the chances of the cell surviving. Data are available from ProteomeXchange with the identifier PXD041121.
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Affiliation(s)
- Nadav Elkoshi
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Shivang Parikh
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Hagar Malcov-Brog
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Roma Parikh
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Paulee Manich
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Francesca Netti
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Avishai Maliah
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Hana Elkoshi
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Majd Haj
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Ido Rippin
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Jacob Frand
- Department of Plastic and Reconstructive Surgery, Edith Wolfson Medical Center, Holon, Israel
| | - Tomer Perluk
- Department of Plastic and Reconstructive Surgery, Edith Wolfson Medical Center, Holon, Israel
| | - Rivi Haiat-Factor
- Department of Plastic and Reconstructive Surgery, Edith Wolfson Medical Center, Holon, Israel
| | - Tamar Golan
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Neta Regev-Rudzki
- Department of Biomolecular Sciences, Faculty of Biochemistry, Weizmann Institute of Science, Rehovot, Israel
| | - Edo Kiper
- Department of Biomolecular Sciences, Faculty of Biochemistry, Weizmann Institute of Science, Rehovot, Israel
| | - Ronen Brenner
- Institute of Oncology, Edith Wolfson Medical Center, Holon, Israel
| | - Pinchas Gonen
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Iris Dror
- Department of Biological Chemistry, University of California Loss Angeles School of Medicine, Los Angeles, California, USA
| | - Hagai Levi
- The Blavatnik School of Computer Science, Tel Aviv University, Tel Aviv, Israel
| | - Ofir Hameiri
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Mazal Cohen-Gulkar
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Hagit Eldar-Finkelman
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Gil Ast
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Eran Nizri
- Department of Dermatology, Tel Aviv Sourasky Medical Center Ichilov, Tel Aviv, Israel; Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Yael Ziv
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Rani Elkon
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Mehdi Khaled
- INSERM 1186, Gustave Roussy, Université Paris-Saclay, Villejuif, France
| | - Yuval Ebenstein
- School of Chemistry, Center for Nanoscience and Nanotechnology, Center for Light-Matter Interaction, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Yosef Shiloh
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Carmit Levy
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
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Agbarya A, Sarel I, Ziv-Baran T, Agranat S, Schwartz O, Shai A, Nordheimer S, Fenig S, Shechtman Y, Kozlener E, Taha T, Nasrallah H, Parikh R, Elkoshi N, Levy C, Khoury R, Brenner R. Efficacy of the mRNA-Based BNT162b2 COVID-19 Vaccine in Patients with Solid Malignancies Treated with Anti-Neoplastic Drugs. Cancers (Basel) 2021; 13:4191. [PMID: 34439346 PMCID: PMC8391288 DOI: 10.3390/cancers13164191] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 08/15/2021] [Accepted: 08/17/2021] [Indexed: 12/30/2022] Open
Abstract
The BNT162b2 vaccine was shown to be highly effective in reducing the risk of COVID-19 infection in healthy individuals and patients with chronic disease. However, there are little data regarding its efficacy in patients treated for cancer. We analyzed the humoral response following vaccination with the second dose of BNT162b2 in 140 patients with solid malignancies who were receiving anti-cancer therapy at the time of vaccination and 215 participants who had not been diagnosed with cancer. Multivariate analysis was performed, followed by matching the two groups by age, gender and days from vaccination. The humoral response in the cancer patient group was significantly lower than in the non-cancer group: 20/140 seronegative (14.3%) vs. 3/215 (1.4%), p < 0.001; median IgG levels 2231 AU/mL (IQR 445-8023) vs. 4100 (IQR 2231-6774) p = 0.001 respectively. The odds ratio for negative serology results in cancer patients adjusted by age and gender was 7.35 compared to participants without cancer. This effect was observed only in chemotherapy treated patients: 17/73 seronegative (23.3%) vs. 3/215 (1.4%), p < 0.001; median IgG 1361 AU/mL vs. 4100, p < 0.001 but not in patients treated with non-chemotherapeutic drugs. Reduced immunogenicity to COVID-19 vaccine among chemotherapy-treated cancer patients, raises the need to continue exercising protective measures after vaccination in these patients.
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Affiliation(s)
- Abed Agbarya
- Bnai-Zion Medical Center, Oncology Institute, 47 Golomb Avenue, Haifa 3339419, Israel; (Y.S.); (E.K.); (R.K.)
| | - Ina Sarel
- Edith Wolfson Medical Center, Oncology Institute, 62 Halohamim Street, Holon 5822012, Israel; (I.S.); (S.A.); (S.N.); (S.F.)
| | - Tomer Ziv-Baran
- School of Public Health, Sackler Faculty of Medicine, Tel-Aviv University, 35 Klatchkin Street, Tel-Aviv 6997801, Israel;
| | - Sivan Agranat
- Edith Wolfson Medical Center, Oncology Institute, 62 Halohamim Street, Holon 5822012, Israel; (I.S.); (S.A.); (S.N.); (S.F.)
| | - Orna Schwartz
- Microbiology and Immunology Laboratory, Edith Wolfson Medical Center, 62 Halohamim Street, Holon 5822012, Israel;
| | - Ayelet Shai
- Department of Oncology, Galilee Medical Center, P.O. Box 21, Nahariya 22100, Israel;
| | - Sharon Nordheimer
- Edith Wolfson Medical Center, Oncology Institute, 62 Halohamim Street, Holon 5822012, Israel; (I.S.); (S.A.); (S.N.); (S.F.)
| | - Shlomit Fenig
- Edith Wolfson Medical Center, Oncology Institute, 62 Halohamim Street, Holon 5822012, Israel; (I.S.); (S.A.); (S.N.); (S.F.)
| | - Yelena Shechtman
- Bnai-Zion Medical Center, Oncology Institute, 47 Golomb Avenue, Haifa 3339419, Israel; (Y.S.); (E.K.); (R.K.)
| | - Ella Kozlener
- Bnai-Zion Medical Center, Oncology Institute, 47 Golomb Avenue, Haifa 3339419, Israel; (Y.S.); (E.K.); (R.K.)
| | - Tarek Taha
- Department of Oncology, Rambam Health Care Campus, 8 HaAlyia Hashniya, Haifa 31096, Israel; (T.T.); (H.N.)
| | - Haitam Nasrallah
- Department of Oncology, Rambam Health Care Campus, 8 HaAlyia Hashniya, Haifa 31096, Israel; (T.T.); (H.N.)
| | - Roma Parikh
- Department of Human Genetics and Biochemistry, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv 69978, Israel; (R.P.); (N.E.); (C.L.)
| | - Nadav Elkoshi
- Department of Human Genetics and Biochemistry, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv 69978, Israel; (R.P.); (N.E.); (C.L.)
| | - Carmit Levy
- Department of Human Genetics and Biochemistry, Sackler Faculty of Medicine, Tel-Aviv University, Tel-Aviv 69978, Israel; (R.P.); (N.E.); (C.L.)
| | - Rasha Khoury
- Bnai-Zion Medical Center, Oncology Institute, 47 Golomb Avenue, Haifa 3339419, Israel; (Y.S.); (E.K.); (R.K.)
| | - Ronen Brenner
- Edith Wolfson Medical Center, Oncology Institute, 62 Halohamim Street, Holon 5822012, Israel; (I.S.); (S.A.); (S.N.); (S.F.)
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Sheinboim D, Parikh S, Parikh R, Menuchin A, Shapira G, Kapitansky O, Elkoshi N, Ruppo S, Shaham L, Golan T, Elgavish S, Nevo Y, Bell RE, Malcov H, Shomron N, Taub JW, Izraeli S, Levy C. Slow transcription of the 99a/let-7c/125b-2 cluster results in differential miRNA expression and promotes melanoma phenotypic plasticity. J Invest Dermatol 2021; 141:2944-2956.e6. [PMID: 34186058 DOI: 10.1016/j.jid.2021.03.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 03/21/2021] [Accepted: 03/31/2021] [Indexed: 10/21/2022]
Abstract
Almost half of human miRNAs are encoded in clusters. Although transcribed as a single unit, the levels of individual mature miRNAs often differ. The mechanisms underlying differential biogenesis of clustered miRNAs and the resulting physiological implications are mostly unknown. Here, we report that the melanoma master transcription regulator MITF regulates the differential expression of the 99a/let-7c/125b-2 cluster by altering the distribution of RNA polymerase II (Pol-II) along the cluster. We discovered that MITF interacts with TRIM28, a known inhibitor of Pol-II transcription elongation, at the let-7c region resulting in Pol-II pausing and causing its elevated expression, whereas low levels of Pol-II occupation over miR-99a and miR-125b-2 regions decreases their biogenesis. Furthermore, we showed that this differential expression affects the phenotypic state of melanoma cells. RNA-seq analysis of proliferative melanoma cells that express miR-99a and miR-125b mimics revealed a transcriptomic shift toward an invasive phenotype. Conversely, expression of a let-7c mimic in invasive melanoma cells induced a shift to a more proliferative state. We confirmed direct target genes of these miRNAs: FGFR3, BAP1, Bcl2, TGFBR1, and CDKN1A. Our study demonstrates a MITF-governed biogenesis mechanism that results in differential expression of clustered 99a/let-7c/125b-2 miRNAs that control melanoma progression.
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Affiliation(s)
- Danna Sheinboim
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Shivang Parikh
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Roma Parikh
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Amitai Menuchin
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Guy Shapira
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Oxana Kapitansky
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Nadav Elkoshi
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Shmuel Ruppo
- Info-CORE, Bioinformatics Unit of the I-CORE, Hebrew University of Jerusalem and Hadassah Medical Center, Jerusalem 9112102, Israel
| | - Lital Shaham
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel; Division of Pediatric Hematology-Oncology Department, Schneider Children's Medical Center, Petah Tikva 49202, Israel
| | - Tamar Golan
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Sharona Elgavish
- Info-CORE, Bioinformatics Unit of the I-CORE, Hebrew University of Jerusalem and Hadassah Medical Center, Jerusalem 9112102, Israel
| | - Yuval Nevo
- Info-CORE, Bioinformatics Unit of the I-CORE, Hebrew University of Jerusalem and Hadassah Medical Center, Jerusalem 9112102, Israel
| | - Rachel E Bell
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Hagar Malcov
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Noam Shomron
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel; Edmond J. Safra Center of Bioinformatics, Tel Aviv University, Tel Aviv 69978, Israel
| | - Jeffrey W Taub
- Wayne State University School of Medicine, Detroit, MI 48201, USA; Division of Pediatric Hematology and Oncology, Children's Hospital of Michigan, Detroit, MI 48201, USA
| | - Shai Izraeli
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel; Info-CORE, Bioinformatics Unit of the I-CORE, Hebrew University of Jerusalem and Hadassah Medical Center, Jerusalem 9112102, Israel
| | - Carmit Levy
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel.
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Gilat N, Torchinsky D, Margalit S, Michaeli Y, Avraham S, Sharim H, Elkoshi N, Levy C, Zirkin S, Ebenstein Y. Rapid Quantification of Oxidation and UV Induced DNA Damage by Repair Assisted Damage Detection-(Rapid RADD). Anal Chem 2020; 92:9887-9894. [PMID: 32578422 DOI: 10.1021/acs.analchem.0c01393] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Knowing the amount and type of DNA damage is of great significance for a broad range of clinical and research applications. However, existing methods are either lacking in their ability to distinguish between types of DNA damage or limited in their sensitivity and reproducibility. The method described herein enables rapid and robust quantification of type-specific single-strand DNA damage. The method is based on repair-assisted damage detection (RADD) by which fluorescent nucleotides are incorporated into DNA damage sites using type-specific repair enzymes. Up to 90 DNA samples are then deposited on a multiwell glass slide, and analyzed by a conventional slide scanner for quantification of DNA damage levels. Accurate and sensitive measurements of oxidative or UV-induced DNA damage levels and repair kinetics are presented for both in vitro and in vivo models.
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Affiliation(s)
- Noa Gilat
- School of Chemistry, Center for Nanoscience and Nanotechnology, Center for Light-Matter Interaction, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Dmitry Torchinsky
- School of Chemistry, Center for Nanoscience and Nanotechnology, Center for Light-Matter Interaction, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Sapir Margalit
- School of Chemistry, Center for Nanoscience and Nanotechnology, Center for Light-Matter Interaction, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Yael Michaeli
- School of Chemistry, Center for Nanoscience and Nanotechnology, Center for Light-Matter Interaction, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Sigal Avraham
- School of Chemistry, Center for Nanoscience and Nanotechnology, Center for Light-Matter Interaction, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Hila Sharim
- School of Chemistry, Center for Nanoscience and Nanotechnology, Center for Light-Matter Interaction, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Nadav Elkoshi
- Department of Human Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Carmit Levy
- Department of Human Genetics and Biochemistry, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Shahar Zirkin
- School of Chemistry, Center for Nanoscience and Nanotechnology, Center for Light-Matter Interaction, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Yuval Ebenstein
- School of Chemistry, Center for Nanoscience and Nanotechnology, Center for Light-Matter Interaction, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel
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7
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Levy M, Elkoshi N, Barber-Zucker S, Hoch E, Zarivach R, Hershfinkel M, Sekler I. Zinc transporter 10 (ZnT10)-dependent extrusion of cellular Mn 2+ is driven by an active Ca 2+-coupled exchange. J Biol Chem 2019; 294:5879-5889. [PMID: 30755481 DOI: 10.1074/jbc.ra118.006816] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 01/30/2019] [Indexed: 01/11/2023] Open
Abstract
Manganese (Mn2+) is extruded from the cell by the zinc transporter 10 (ZnT10). Loss of ZnT10 expression caused by autosomal mutations in the ZnT10 gene leads to hypermanganesemia in multiple organs. Here, combining fluorescent monitoring of cation influx in HEK293-T cells expressing human ZnT10 with molecular modeling of ZnT10 cation selectivity, we show that ZnT10 is exploiting the transmembrane Ca2+ inward gradient for active cellular exchange of Mn2+ In analyzing ZnT10 activity we used the ability of Fura-2 to spectrally distinguish between Mn2+ and Ca2+ fluxes. We found that (a) application of Mn2+-containing Ca2+-free solution to ZnT10-expressing cells triggers an influx of Mn2+, (b) reintroduction of Ca2+ leads to cellular Mn2+ extrusion against an inward Mn2+ gradient, and (c) the cellular transport of Mn2+ by ZnT10 is coupled to a reciprocal movement of Ca2+ Remarkably, replacing a single asparagine residue in ZnT10 (Asp-43) with threonine (ZnT10 N43T) converted the Mn2+/Ca2+ exchange to an uncoupled channel mode, permeable to both Ca2+ and Mn2+ The findings in our study identify the first ion transporter that uses the Ca2+ gradient for active counter-ion exchange. They highlight a remarkable versatility in metal selectivity and mode of transport controlled by the tetrahedral metal transport site of ZnT proteins.
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Affiliation(s)
- Moshe Levy
- From the Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva 8410501 Israel
| | - Nadav Elkoshi
- From the Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva 8410501 Israel
| | - Shiran Barber-Zucker
- Department of Life Sciences and The National Institute for Biotechnology in the Negev and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer Sheva 8410501 Israel
| | - Eitan Hoch
- Program in Medical and Population Genetics and Metabolism Program, Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142
| | - Raz Zarivach
- Department of Life Sciences and The National Institute for Biotechnology in the Negev and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer Sheva 8410501 Israel
| | - Michal Hershfinkel
- From the Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva 8410501 Israel
| | - Israel Sekler
- From the Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva 8410501 Israel.
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