1
|
Zhang M, Guo X, Gao Y, Lu D, Li W. Tumor Cell- Accelerated Senescence Is Associated With DNA-PKcs Status and Telomere Dysfunction Induced by Radiation. Dose Response 2018; 16:1559325818771527. [PMID: 29760601 PMCID: PMC5944147 DOI: 10.1177/1559325818771527] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [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: 01/11/2018] [Revised: 03/08/2018] [Accepted: 03/20/2018] [Indexed: 12/31/2022] Open
Abstract
Whether telomere structure integrity is related to radiosensitivity is not well investigated thus far. In this study, we investigated the relation between telomere instability and radiation-induced accelerated senescence. Partial knockdown of DNA-dependent catalytic subunit of protein kinase (DNA-PKcs) in human breast cancer cell line MCF-7 was established by small interfering RNA. Radiosensitivity of control and DNA-PKcs knockdown MCF-7 cells was analyzed by clonogenetic assay. Cell growth was measured by real-time cell electronic sensing. Senescence and apoptosis were evaluated by β-galactosidase histochemical staining and fluorescence-activated cell sorting, respectively. DNA damage was determined by long polymerase chain reaction (PCR). Telomere length and integrity were analyzed by real-time PCR and cytogenetic assay, respectively. DNA-PKcs knockdown MCF-7 cells were more sensitive to X-irradiation than control cells. Further investigation revealed that accelerated senescence is more pronounced than apoptosis in cells after radiation, particularly in DNA-PKcs knockdown cells. The cytogenetic assay and kinetics of DNA damage repair revealed that the role of telomere end-capping in DNA-PKcs, rather than DNA damage repair, was more relevant to radiosensitivity. To our knowledge, this is the first study to show that DNA-PKcs plays an important role in radiation-induced accelerated senescence via maintenance of telomere integrity in MCF-7 cells. These results could be useful for future understanding of the radiation-induced genome instability and its consequences.
Collapse
Affiliation(s)
- Miaomiao Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.,College of Life Science, University of Chinese Academy of Sciences, Beijing, China
| | - Xiaopeng Guo
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.,College of Life Science, University of Chinese Academy of Sciences, Beijing, China
| | - Yue Gao
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China.,College of Life Science, University of Chinese Academy of Sciences, Beijing, China
| | - Dong Lu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - Wenjian Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| |
Collapse
|
2
|
McCart EA, Thangapazham RL, Lombardini ED, Mog SR, Panganiban RAM, Dickson KM, Mansur RA, Nagy V, Kim SY, Selwyn R, Landauer MR, Darling TN, Day RM. Accelerated senescence in skin in a murine model of radiation-induced multi-organ injury. J Radiat Res 2017; 58:636-646. [PMID: 28340212 PMCID: PMC5737212 DOI: 10.1093/jrr/rrx008] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 01/10/2017] [Indexed: 05/24/2023]
Abstract
Accidental high-dose radiation exposures can lead to multi-organ injuries, including radiation dermatitis. The types of cellular damage leading to radiation dermatitis are not completely understood. To identify the cellular mechanisms that underlie radiation-induced skin injury in vivo, we evaluated the time-course of cellular effects of radiation (14, 16 or 17 Gy X-rays; 0.5 Gy/min) in the skin of C57BL/6 mice. Irradiation of 14 Gy induced mild inflammation, observed histologically, but no visible hair loss or erythema. However, 16 or 17 Gy radiation induced dry desquamation, erythema and mild ulceration, detectable within 14 days post-irradiation. Histological evaluation revealed inflammation with mast cell infiltration within 14 days. Fibrosis occurred 80 days following 17 Gy irradiation, with collagen deposition, admixed with neutrophilic dermatitis, and necrotic debris. We found that in cultures of normal human keratinocytes, exposure to 17.9 Gy irradiation caused the upregulation of p21/waf1, a marker of senescence. Using western blot analysis of 17.9 Gy-irradiated mice skin samples, we also detected a marker of accelerated senescence (p21/waf1) 7 days post-irradiation, and a marker of cellular apoptosis (activated caspase-3) at 30 days, both preceding histological evidence of inflammatory infiltrates. Immunohistochemistry revealed reduced epithelial stem cells from hair follicles 14-30 days post-irradiation. Furthermore, p21/waf1 expression was increased in the region of the hair follicle stem cells at 14 days post 17 Gy irradiation. These data indicate that radiation induces accelerated cellular senescence in the region of the stem cell population of the skin.
Collapse
Affiliation(s)
- Elizabeth A McCart
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD 20814, USA
| | - Rajesh L Thangapazham
- Department of Dermatology, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD 20814, USA
| | - Eric D Lombardini
- Current address: Public Health Activity-Fort Carson, 1661 O'Connell Blvd, Fort Carson, CO 80913, USA
| | - Steven R Mog
- Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, 5001 Campus Drive, College Park, MD 20740, USA
| | - Ronald Allan M Panganiban
- Current address: Molecular and Integrative Physiological Sciences, Harvard TH Chan School of Public Health, 677 Huntington Ave., Boston, MA 02115, USA
| | - Kelley M Dickson
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD 20814, USA
| | - Rihab A Mansur
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD 20814, USA
| | - Vitaly Nagy
- Department of Radiation Dosimetry, Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD 20814, USA
| | - Sung-Yop Kim
- Current address: Department of Radiology, University of New Mexico, 1 University of New Mexico, Albuquerque, NM 87131, USA
| | - Reed Selwyn
- Current address: Department of Radiology, University of New Mexico, 1 University of New Mexico, Albuquerque, NM 87131, USA
| | - Michael R Landauer
- Radiation Countermeasures Program, Scientific Research Department, Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD 20814, USA
| | - Thomas N Darling
- Department of Dermatology, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD 20814, USA
| | - Regina M Day
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD 20814, USA
| |
Collapse
|
4
|
Castro-Garcia P, Díaz-Moreno M, Gil-Gas C, Fernández-Gómez FJ, Honrubia-Gómez P, Álvarez-Simón CB, Sánchez-Sánchez F, Cano JCC, Almeida F, Blanco V, Jordán J, Mira H, Ramírez-Castillejo C. Defects in subventricular zone pigmented epithelium-derived factor niche signaling in the senescence-accelerated mouse prone-8. FASEB J 2015; 29:1480-92. [PMID: 25636741 DOI: 10.1096/fj.13-244442] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [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: 01/06/2014] [Accepted: 12/05/2014] [Indexed: 12/27/2022]
Abstract
We studied potential changes in the subventricular zone (SVZ) stem cell niche of the senescence-accelerated mouse prone-8 (SAM-P8) aging model. Bromodeoxyuridine (BrdU) assays with longtime survival revealed a lower number of label-retaining stem cells in the SAM-P8 SVZ compared with the SAM-Resistant 1 (SAM-R1) control strain. We also found that in SAM-P8 niche signaling is attenuated and the stem cell pool is less responsive to the self-renewal niche factor pigmented epithelium-derived factor (PEDF). Protein analysis demonstrated stable amounts of the PEDF ligand in the SAM-P8 SVZ niche; however, SAM-P8 stem cells present a significant expression decrease of patatin-like phospholipase domain containing 2, a receptor for PEDF (PNPLA2-PEDF) receptor, but not of laminin receptor (LR), a receptor for PEDF (LR-PEDF) receptor. We observed changes in self-renewal related genes (hairy and enhancer of split 1 (Hes1), hairy and enhancer of split 1 (Hes5), Sox2] and report that although these genes are down-regulated in SAM-P8, differentiation genes (Pax6) are up-regulated and neurogenesis is increased. Finally, sheltering mammalian telomere complexes might be also involved given a down-regulation of telomeric repeat binding factor 1 (Terf1) expression was observed in SAM-P8 at young age periods. Differences between these 2 models, SAM-P8 and SAM-R1 controls, have been previously detected at more advanced ages. We now describe alterations in the PEDF signaling pathway and stem cell self-renewal at a very young age, which could be involved in the premature senescence observed in the SAM-P8 model.
Collapse
Affiliation(s)
- Paola Castro-Garcia
- *Laboratorio de Células Madre, Centro Regional de Investigaciones Biomédicas, Universidad de Castilla-La Mancha, Albacete, Spain; Unidad Funcional de Investigación en Enfermedades Crónicas, Instituto de Salud Carlos III, Madrid, Spain; Grupo de Neurofarmacología, Departamento de Ciencias Médicas, Area de Genética, Facultad de Medicina de Albacete, and Instituto de Investigación en Discapacidades Neurológicas, Universidad de Castilla-La Mancha, Albacete, Spain; and Departamento Estadística, I. O. y Computación, Universidad de La Laguna, La Laguna, Canarias, Spain
| | - María Díaz-Moreno
- *Laboratorio de Células Madre, Centro Regional de Investigaciones Biomédicas, Universidad de Castilla-La Mancha, Albacete, Spain; Unidad Funcional de Investigación en Enfermedades Crónicas, Instituto de Salud Carlos III, Madrid, Spain; Grupo de Neurofarmacología, Departamento de Ciencias Médicas, Area de Genética, Facultad de Medicina de Albacete, and Instituto de Investigación en Discapacidades Neurológicas, Universidad de Castilla-La Mancha, Albacete, Spain; and Departamento Estadística, I. O. y Computación, Universidad de La Laguna, La Laguna, Canarias, Spain
| | - Carmen Gil-Gas
- *Laboratorio de Células Madre, Centro Regional de Investigaciones Biomédicas, Universidad de Castilla-La Mancha, Albacete, Spain; Unidad Funcional de Investigación en Enfermedades Crónicas, Instituto de Salud Carlos III, Madrid, Spain; Grupo de Neurofarmacología, Departamento de Ciencias Médicas, Area de Genética, Facultad de Medicina de Albacete, and Instituto de Investigación en Discapacidades Neurológicas, Universidad de Castilla-La Mancha, Albacete, Spain; and Departamento Estadística, I. O. y Computación, Universidad de La Laguna, La Laguna, Canarias, Spain
| | - Francisco J Fernández-Gómez
- *Laboratorio de Células Madre, Centro Regional de Investigaciones Biomédicas, Universidad de Castilla-La Mancha, Albacete, Spain; Unidad Funcional de Investigación en Enfermedades Crónicas, Instituto de Salud Carlos III, Madrid, Spain; Grupo de Neurofarmacología, Departamento de Ciencias Médicas, Area de Genética, Facultad de Medicina de Albacete, and Instituto de Investigación en Discapacidades Neurológicas, Universidad de Castilla-La Mancha, Albacete, Spain; and Departamento Estadística, I. O. y Computación, Universidad de La Laguna, La Laguna, Canarias, Spain
| | - Paloma Honrubia-Gómez
- *Laboratorio de Células Madre, Centro Regional de Investigaciones Biomédicas, Universidad de Castilla-La Mancha, Albacete, Spain; Unidad Funcional de Investigación en Enfermedades Crónicas, Instituto de Salud Carlos III, Madrid, Spain; Grupo de Neurofarmacología, Departamento de Ciencias Médicas, Area de Genética, Facultad de Medicina de Albacete, and Instituto de Investigación en Discapacidades Neurológicas, Universidad de Castilla-La Mancha, Albacete, Spain; and Departamento Estadística, I. O. y Computación, Universidad de La Laguna, La Laguna, Canarias, Spain
| | - Carmen Belén Álvarez-Simón
- *Laboratorio de Células Madre, Centro Regional de Investigaciones Biomédicas, Universidad de Castilla-La Mancha, Albacete, Spain; Unidad Funcional de Investigación en Enfermedades Crónicas, Instituto de Salud Carlos III, Madrid, Spain; Grupo de Neurofarmacología, Departamento de Ciencias Médicas, Area de Genética, Facultad de Medicina de Albacete, and Instituto de Investigación en Discapacidades Neurológicas, Universidad de Castilla-La Mancha, Albacete, Spain; and Departamento Estadística, I. O. y Computación, Universidad de La Laguna, La Laguna, Canarias, Spain
| | - Francisco Sánchez-Sánchez
- *Laboratorio de Células Madre, Centro Regional de Investigaciones Biomédicas, Universidad de Castilla-La Mancha, Albacete, Spain; Unidad Funcional de Investigación en Enfermedades Crónicas, Instituto de Salud Carlos III, Madrid, Spain; Grupo de Neurofarmacología, Departamento de Ciencias Médicas, Area de Genética, Facultad de Medicina de Albacete, and Instituto de Investigación en Discapacidades Neurológicas, Universidad de Castilla-La Mancha, Albacete, Spain; and Departamento Estadística, I. O. y Computación, Universidad de La Laguna, La Laguna, Canarias, Spain
| | - Juan Carlos Castillo Cano
- *Laboratorio de Células Madre, Centro Regional de Investigaciones Biomédicas, Universidad de Castilla-La Mancha, Albacete, Spain; Unidad Funcional de Investigación en Enfermedades Crónicas, Instituto de Salud Carlos III, Madrid, Spain; Grupo de Neurofarmacología, Departamento de Ciencias Médicas, Area de Genética, Facultad de Medicina de Albacete, and Instituto de Investigación en Discapacidades Neurológicas, Universidad de Castilla-La Mancha, Albacete, Spain; and Departamento Estadística, I. O. y Computación, Universidad de La Laguna, La Laguna, Canarias, Spain
| | - Francisco Almeida
- *Laboratorio de Células Madre, Centro Regional de Investigaciones Biomédicas, Universidad de Castilla-La Mancha, Albacete, Spain; Unidad Funcional de Investigación en Enfermedades Crónicas, Instituto de Salud Carlos III, Madrid, Spain; Grupo de Neurofarmacología, Departamento de Ciencias Médicas, Area de Genética, Facultad de Medicina de Albacete, and Instituto de Investigación en Discapacidades Neurológicas, Universidad de Castilla-La Mancha, Albacete, Spain; and Departamento Estadística, I. O. y Computación, Universidad de La Laguna, La Laguna, Canarias, Spain
| | - Vicente Blanco
- *Laboratorio de Células Madre, Centro Regional de Investigaciones Biomédicas, Universidad de Castilla-La Mancha, Albacete, Spain; Unidad Funcional de Investigación en Enfermedades Crónicas, Instituto de Salud Carlos III, Madrid, Spain; Grupo de Neurofarmacología, Departamento de Ciencias Médicas, Area de Genética, Facultad de Medicina de Albacete, and Instituto de Investigación en Discapacidades Neurológicas, Universidad de Castilla-La Mancha, Albacete, Spain; and Departamento Estadística, I. O. y Computación, Universidad de La Laguna, La Laguna, Canarias, Spain
| | - Joaquín Jordán
- *Laboratorio de Células Madre, Centro Regional de Investigaciones Biomédicas, Universidad de Castilla-La Mancha, Albacete, Spain; Unidad Funcional de Investigación en Enfermedades Crónicas, Instituto de Salud Carlos III, Madrid, Spain; Grupo de Neurofarmacología, Departamento de Ciencias Médicas, Area de Genética, Facultad de Medicina de Albacete, and Instituto de Investigación en Discapacidades Neurológicas, Universidad de Castilla-La Mancha, Albacete, Spain; and Departamento Estadística, I. O. y Computación, Universidad de La Laguna, La Laguna, Canarias, Spain
| | - Helena Mira
- *Laboratorio de Células Madre, Centro Regional de Investigaciones Biomédicas, Universidad de Castilla-La Mancha, Albacete, Spain; Unidad Funcional de Investigación en Enfermedades Crónicas, Instituto de Salud Carlos III, Madrid, Spain; Grupo de Neurofarmacología, Departamento de Ciencias Médicas, Area de Genética, Facultad de Medicina de Albacete, and Instituto de Investigación en Discapacidades Neurológicas, Universidad de Castilla-La Mancha, Albacete, Spain; and Departamento Estadística, I. O. y Computación, Universidad de La Laguna, La Laguna, Canarias, Spain
| | - Carmen Ramírez-Castillejo
- *Laboratorio de Células Madre, Centro Regional de Investigaciones Biomédicas, Universidad de Castilla-La Mancha, Albacete, Spain; Unidad Funcional de Investigación en Enfermedades Crónicas, Instituto de Salud Carlos III, Madrid, Spain; Grupo de Neurofarmacología, Departamento de Ciencias Médicas, Area de Genética, Facultad de Medicina de Albacete, and Instituto de Investigación en Discapacidades Neurológicas, Universidad de Castilla-La Mancha, Albacete, Spain; and Departamento Estadística, I. O. y Computación, Universidad de La Laguna, La Laguna, Canarias, Spain
| |
Collapse
|