1
|
Impey S, Pelz C, Riparip LK, Tafessu A, Fareh F, Zuloaga DG, Marzulla T, Stewart B, Rosi S, Turker MS, Raber J. Postsynaptic density radiation signature following space irradiation. Front Physiol 2023; 14:1215535. [PMID: 37440997 PMCID: PMC10334289 DOI: 10.3389/fphys.2023.1215535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 06/14/2023] [Indexed: 07/15/2023] Open
Abstract
Introduction: The response of the brain to space radiation is an important concern for astronauts during space missions. Therefore, we assessed the response of the brain to 28Si ion irradiation (600 MeV/n), a heavy ion present in the space environment, on cognitive performance and whether the response is associated with altered DNA methylation in the hippocampus, a brain area important for cognitive performance. Methods: We determined the effects of 28Si ion irradiation on object recognition, 6-month-old mice irradiated with 28Si ions (600 MeV/n, 0.3, 0.6, and 0.9 Gy) and cognitively tested two weeks later. In addition, we determined if those effects were associated with alterations in hippocampal networks and/or hippocampal DNA methylation. Results: At 0.3 Gy, but not at 0.6 Gy or 0.9 Gy, 28Si ion irradiation impaired cognition that correlated with altered gene expression and 5 hmC profiles that mapped to specific gene ontology pathways. Comparing hippocampal DNA hydroxymethylation following proton, 56Fe ion, and 28Si ion irradiation revealed a general space radiation synaptic signature with 45 genes that are associated with profound phenotypes. The most significant categories were glutamatergic synapse and postsynaptic density. Discussion: The brain's response to space irradiation involves novel excitatory synapse and postsynaptic remodeling.
Collapse
Affiliation(s)
- Soren Impey
- Department of Pediatrics, Oregon Stem Cell Center, Oregon Health and Science University, Portland, OR, United States
- Dow Neuroscience Laboratories, Department of Cell and Developmental Biology, Legacy Research Institute, Legacy Health Systems, Oregon Health and Science University, Portland, OR, United States
| | - Carl Pelz
- Department of Pediatrics, Oregon Stem Cell Center, Oregon Health and Science University, Portland, OR, United States
| | - Lara-Kirstie Riparip
- Departments of Neurological Surgery and Physical Therapy and Rehabilitation Science, Brain and Spinal Injury Center, University of California, San Francisco, San Francisco, CA, United States
| | - Amanuel Tafessu
- Department of Pediatrics, Oregon Stem Cell Center, Oregon Health and Science University, Portland, OR, United States
| | - Fatema Fareh
- Department of Pediatrics, Oregon Stem Cell Center, Oregon Health and Science University, Portland, OR, United States
| | - Damian G. Zuloaga
- Department of Behavioral Neuroscience, Oregon Health and Science University, Portland, OR, United States
| | - Tessa Marzulla
- Department of Behavioral Neuroscience, Oregon Health and Science University, Portland, OR, United States
| | - Blair Stewart
- Department of Behavioral Neuroscience, Oregon Health and Science University, Portland, OR, United States
| | - Susanna Rosi
- Departments of Neurological Surgery and Physical Therapy and Rehabilitation Science, Brain and Spinal Injury Center, University of California, San Francisco, San Francisco, CA, United States
| | - Mitchell S. Turker
- Department of Molecular and Medical Genetics, Oregon Institute of Occupational Health Sciences, Oregon Health and Science University, Portland, OR, United States
| | - Jacob Raber
- Department of Behavioral Neuroscience, Oregon Health and Science University, Portland, OR, United States
- Departments of Neurology and Radiation Medicine, Division of Neuroscience ONPRC, Oregon Health and Science University, Portland, OR, United States
| |
Collapse
|
2
|
Bastide K, Ugolin N, Levalois C, Bernaudin JF, Chevillard S. Are adenosquamous lung carcinomas a simple mix of adenocarcinomas and squamous cell carcinomas, or more complex at the molecular level? Lung Cancer 2009; 68:1-9. [PMID: 20004040 DOI: 10.1016/j.lungcan.2009.11.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2009] [Revised: 09/17/2009] [Accepted: 11/02/2009] [Indexed: 12/23/2022]
Abstract
Adenocarcinomas (AC), squamous cell carcinomas (SCC) and adenosquamous carcinomas (ASC) are three histological subtypes of non-small-cell lung carcinomas (NSCLC). ASC are morphologically mixed tumours that contain the two cell components AC and SCC. To understand if they are a "simple" mix of AC and SCC or if they present molecular specificities, as compared with the molecular characterization of both components, we performed a comparative transcriptome analysis on a series of nine ASC, five AC and five SCC induced in rats by radon exposure. We found that 72, 40 and 39 genes were differentially expressed when comparing AC_SCC, ASC_SCC and AC_ASC, respectively. Moreover, when classifying the three histological subtypes, using genes that discriminated AC and SCC, we observed that all ASC were classified as intermediate between the AC and SCC, some being closer to AC, others to SCC. These results indicated that, regarding gene expression, ASC could be considered as a mix of AC and SCC, both in various proportions. However, they also exhibit molecular specificities since we found specific genes discriminating ASC_SCC and AC_ASC. In conclusion, the ASC mixed lung tumours are more complex than simple mixes of AC and SCC components. Neuroendocrine differentiation and ERK proliferation pathways seemed preferentially deregulated in ASC compared to AC and SCC respectively, pathways that are worthy of being explored because they could partially explain the high clinical aggressiveness of ASC.
Collapse
MESH Headings
- Adenocarcinoma/chemically induced
- Adenocarcinoma/genetics
- Adenocarcinoma/metabolism
- Adenocarcinoma/pathology
- Animals
- Carcinoma, Adenosquamous/chemically induced
- Carcinoma, Adenosquamous/genetics
- Carcinoma, Adenosquamous/metabolism
- Carcinoma, Adenosquamous/pathology
- Carcinoma, Squamous Cell/chemically induced
- Carcinoma, Squamous Cell/genetics
- Carcinoma, Squamous Cell/metabolism
- Carcinoma, Squamous Cell/pathology
- Cell Line, Tumor
- Cell Transformation, Neoplastic
- DNA Mutational Analysis
- GATA6 Transcription Factor/genetics
- GATA6 Transcription Factor/metabolism
- Gene Expression Profiling
- Gene Expression Regulation, Neoplastic
- Genes, ras/genetics
- Lung/metabolism
- Lung/pathology
- Lung Neoplasms/chemically induced
- Lung Neoplasms/genetics
- Lung Neoplasms/metabolism
- Lung Neoplasms/pathology
- MAP Kinase Signaling System/genetics
- Microarray Analysis
- Mucin-1/genetics
- Mucin-1/metabolism
- Radon/toxicity
- Rats
- Rats, Sprague-Dawley
- Receptor, Notch2/genetics
- Receptor, Notch2/metabolism
Collapse
Affiliation(s)
- Kristell Bastide
- CEA, DSV, IRCM, SREIT, Laboratoire de Cancérologie Expérimentale, BP6, Fontenay-aux-Roses Cedex F-92265, France.
| | | | | | | | | |
Collapse
|