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Gui R, Li W, Li Z, Wang H, Wu Y, Jiao W, Zhao G, Shen Y, Wang L, Zhang J, Chen S, Hao L, Cheng Y. Effects and potential mechanisms of IGF1/IGF1R in the liver fibrosis: A review. Int J Biol Macromol 2023; 251:126263. [PMID: 37567540 DOI: 10.1016/j.ijbiomac.2023.126263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 08/07/2023] [Accepted: 08/08/2023] [Indexed: 08/13/2023]
Abstract
Liver fibrosis is a wound-healing response due to persistent liver damage and it may progress to cirrhosis and even liver cancer if no intervention is given. In the current cognition, liver fibrosis is reversible. So, it is of great significance to explore the related gene targets or biomarker for anti-fibrosis of liver. Insulin like growth factor 1 (IGF1) and IGF1 receptor (IGF1R) are mainly expressed in the liver tissues and play critical roles in the liver function. The present review summarized the role of IGF1/IGF1R and its signaling system in liver fibrosis and illustrated the potential mechanisms including DNA damage repair, cell senescence, lipid metabolism and oxidative stress that may be involved in this process according to the studies on the fibrosis of liver or other organs. In particular, the roles of IGF1 and IGF1R in DNA damage repair were elaborated, including membrane-localized and nucleus-localized IGF1R. In addition, for each of the potential mechanism in anti-fibrosis of liver, the signaling pathways of the IGF1/IGF1R mediated and the cell species in liver acted by IGF1 and IGF1R under different conditions were included. The data in this review will support for the study about the effect of IGF1/IGF1R on liver fibrosis induced by various factors, meanwhile, provide a basis for the study of liver fibrosis to focus on the communications between the different kinds of liver cells.
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Affiliation(s)
- Ruirui Gui
- NHC Key Laboratory of Radiobiology, College of Public Health, Jilin University, Changchun 130021, China
| | - Wanqiao Li
- NHC Key Laboratory of Radiobiology, College of Public Health, Jilin University, Changchun 130021, China
| | - Zhipeng Li
- NHC Key Laboratory of Radiobiology, College of Public Health, Jilin University, Changchun 130021, China
| | - Hongbin Wang
- NHC Key Laboratory of Radiobiology, College of Public Health, Jilin University, Changchun 130021, China
| | - Yuchen Wu
- NHC Key Laboratory of Radiobiology, College of Public Health, Jilin University, Changchun 130021, China
| | - Wenlin Jiao
- NHC Key Laboratory of Radiobiology, College of Public Health, Jilin University, Changchun 130021, China
| | - Gang Zhao
- NHC Key Laboratory of Radiobiology, College of Public Health, Jilin University, Changchun 130021, China
| | - Yannan Shen
- NHC Key Laboratory of Radiobiology, College of Public Health, Jilin University, Changchun 130021, China
| | - Luping Wang
- NHC Key Laboratory of Radiobiology, College of Public Health, Jilin University, Changchun 130021, China
| | - Jialu Zhang
- NHC Key Laboratory of Radiobiology, College of Public Health, Jilin University, Changchun 130021, China
| | - Sihan Chen
- NHC Key Laboratory of Radiobiology, College of Public Health, Jilin University, Changchun 130021, China
| | - Linlin Hao
- College of Animal Science, Jilin University, Changchun, Jilin 130062, China.
| | - Yunyun Cheng
- NHC Key Laboratory of Radiobiology, College of Public Health, Jilin University, Changchun 130021, China.
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Uruski P, Matuszewska J, Leśniewska A, Rychlewski D, Niklas A, Mikuła-Pietrasik J, Tykarski A, Książek K. An integrative review of nonobvious puzzles of cellular and molecular cardiooncology. Cell Mol Biol Lett 2023; 28:44. [PMID: 37221467 DOI: 10.1186/s11658-023-00451-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Accepted: 04/17/2023] [Indexed: 05/25/2023] Open
Abstract
Oncologic patients are subjected to four major treatment types: surgery, radiotherapy, chemotherapy, and immunotherapy. All nonsurgical forms of cancer management are known to potentially violate the structural and functional integrity of the cardiovascular system. The prevalence and severity of cardiotoxicity and vascular abnormalities led to the emergence of a clinical subdiscipline, called cardiooncology. This relatively new, but rapidly expanding area of knowledge, primarily focuses on clinical observations linking the adverse effects of cancer therapy with deteriorated quality of life of cancer survivors and their increased morbidity and mortality. Cellular and molecular determinants of these relations are far less understood, mainly because of several unsolved paths and contradicting findings in the literature. In this article, we provide a comprehensive view of the cellular and molecular etiology of cardiooncology. We pay particular attention to various intracellular processes that arise in cardiomyocytes, vascular endothelial cells, and smooth muscle cells treated in experimentally-controlled conditions in vitro and in vivo with ionizing radiation and drugs representing diverse modes of anti-cancer activity.
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Affiliation(s)
- Paweł Uruski
- Department of Hypertensiology, Poznań University of Medical Sciences, Długa ½ Str., 61-848, Poznan, Poland
| | - Julia Matuszewska
- Department of Pathophysiology of Ageing and Civilization Diseases, Poznań University of Medical Sciences, Długa ½ Str., 61-848, Poznan, Poland
| | - Aleksandra Leśniewska
- Department of Pathophysiology of Ageing and Civilization Diseases, Poznań University of Medical Sciences, Długa ½ Str., 61-848, Poznan, Poland
| | - Daniel Rychlewski
- Department of Pathophysiology of Ageing and Civilization Diseases, Poznań University of Medical Sciences, Długa ½ Str., 61-848, Poznan, Poland
| | - Arkadiusz Niklas
- Department of Hypertensiology, Poznań University of Medical Sciences, Długa ½ Str., 61-848, Poznan, Poland
| | - Justyna Mikuła-Pietrasik
- Department of Pathophysiology of Ageing and Civilization Diseases, Poznań University of Medical Sciences, Długa ½ Str., 61-848, Poznan, Poland
| | - Andrzej Tykarski
- Department of Hypertensiology, Poznań University of Medical Sciences, Długa ½ Str., 61-848, Poznan, Poland
| | - Krzysztof Książek
- Department of Pathophysiology of Ageing and Civilization Diseases, Poznań University of Medical Sciences, Długa ½ Str., 61-848, Poznan, Poland.
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3
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Russ E, Davis CM, Slaven JE, Bradfield DT, Selwyn RG, Day RM. Comparison of the Medical Uses and Cellular Effects of High and Low Linear Energy Transfer Radiation. TOXICS 2022; 10:toxics10100628. [PMID: 36287908 PMCID: PMC9609561 DOI: 10.3390/toxics10100628] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Revised: 10/13/2022] [Accepted: 10/14/2022] [Indexed: 05/14/2023]
Abstract
Exposure to ionizing radiation can occur during medical treatments, from naturally occurring sources in the environment, or as the result of a nuclear accident or thermonuclear war. The severity of cellular damage from ionizing radiation exposure is dependent upon a number of factors including the absorbed radiation dose of the exposure (energy absorbed per unit mass of the exposure), dose rate, area and volume of tissue exposed, type of radiation (e.g., X-rays, high-energy gamma rays, protons, or neutrons) and linear energy transfer. While the dose, the dose rate, and dose distribution in tissue are aspects of a radiation exposure that can be varied experimentally or in medical treatments, the LET and eV are inherent characteristics of the type of radiation. High-LET radiation deposits a higher concentration of energy in a shorter distance when traversing tissue compared with low-LET radiation. The different biological effects of high and low LET with similar energies have been documented in vivo in animal models and in cultured cells. High-LET results in intense macromolecular damage and more cell death. Findings indicate that while both low- and high-LET radiation activate non-homologous end-joining DNA repair activity, efficient repair of high-LET radiation requires the homologous recombination repair pathway. Low- and high-LET radiation activate p53 transcription factor activity in most cells, but high LET activates NF-kB transcription factor at lower radiation doses than low-LET radiation. Here we review the development, uses, and current understanding of the cellular effects of low- and high-LET radiation exposure.
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Affiliation(s)
- Eric Russ
- Graduate Program of Cellular and Molecular Biology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Catherine M. Davis
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - John E. Slaven
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Dmitry T. Bradfield
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Reed G. Selwyn
- Department of Radiology, University of New Mexico, Albuquerque, NM 87131, USA
| | - Regina M. Day
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
- Correspondence:
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4
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Rittase WB, Slaven JE, Suzuki YJ, Muir JM, Lee SH, Rusnak M, Brehm GV, Bradfield DT, Symes AJ, Day RM. Iron Deposition and Ferroptosis in the Spleen in a Murine Model of Acute Radiation Syndrome. Int J Mol Sci 2022; 23:ijms231911029. [PMID: 36232330 PMCID: PMC9570444 DOI: 10.3390/ijms231911029] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/08/2022] [Accepted: 09/14/2022] [Indexed: 11/16/2022] Open
Abstract
Total body irradiation (TBI) can result in death associated with hematopoietic insufficiency. Although radiation causes apoptosis of white blood cells, red blood cells (RBC) undergo hemolysis due to hemoglobin denaturation. RBC lysis post-irradiation results in the release of iron into the plasma, producing a secondary toxic event. We investigated radiation-induced iron in the spleens of mice following TBI and the effects of the radiation mitigator captopril. RBC and hematocrit were reduced ~7 days (nadir ~14 days) post-TBI. Prussian blue staining revealed increased splenic Fe3+ and altered expression of iron binding and transport proteins, determined by qPCR, western blotting, and immunohistochemistry. Captopril did not affect iron deposition in the spleen or modulate iron-binding proteins. Caspase-3 was activated after ~7–14 days, indicating apoptosis had occurred. We also identified markers of iron-dependent apoptosis known as ferroptosis. The p21/Waf1 accelerated senescence marker was not upregulated. Macrophage inflammation is an effect of TBI. We investigated the effects of radiation and Fe3+ on the J774A.1 murine macrophage cell line. Radiation induced p21/Waf1 and ferritin, but not caspase-3, after ~24 h. Radiation ± iron upregulated several markers of pro-inflammatory M1 polarization; radiation with iron also upregulated a marker of anti-inflammatory M2 polarization. Our data indicate that following TBI, iron accumulates in the spleen where it regulates iron-binding proteins and triggers apoptosis and possible ferroptosis.
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Affiliation(s)
- W. Bradley Rittase
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - John E. Slaven
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Yuichiro J. Suzuki
- Department of Pharmacology and Physiology, Georgetown University Medical Center, Washington, DC 20007, USA
| | - Jeannie M. Muir
- Department of Pathology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Sang-Ho Lee
- Department of Laboratory Animal Research, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Milan Rusnak
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Grace V. Brehm
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Dmitry T. Bradfield
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Aviva J. Symes
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Regina M. Day
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
- Correspondence: ; Tel.: +1-301-295-3236; Fax: +1-301-295-3220
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5
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Hwang HJ, Kim N, Herman AB, Gorospe M, Lee JS. Factors and Pathways Modulating Endothelial Cell Senescence in Vascular Aging. Int J Mol Sci 2022; 23:ijms231710135. [PMID: 36077539 PMCID: PMC9456027 DOI: 10.3390/ijms231710135] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 08/31/2022] [Accepted: 09/01/2022] [Indexed: 11/16/2022] Open
Abstract
Aging causes a progressive decline in the structure and function of organs. With advancing age, an accumulation of senescent endothelial cells (ECs) contributes to the risk of developing vascular dysfunction and cardiovascular diseases, including hypertension, diabetes, atherosclerosis, and neurodegeneration. Senescent ECs undergo phenotypic changes that alter the pattern of expressed proteins, as well as their morphologies and functions, and have been linked to vascular impairments, such as aortic stiffness, enhanced inflammation, and dysregulated vascular tone. Numerous molecules and pathways, including sirtuins, Klotho, RAAS, IGFBP, NRF2, and mTOR, have been implicated in promoting EC senescence. This review summarizes the molecular players and signaling pathways driving EC senescence and identifies targets with possible therapeutic value in age-related vascular diseases.
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Affiliation(s)
- Hyun Jung Hwang
- Research Center for Controlling Intercellular Communication, College of Medicine, Inha University, Incheon 22212, Korea
- Department of Molecular Medicine, College of Medicine, Inha University, Incheon 22212, Korea
| | - Nayeon Kim
- Research Center for Controlling Intercellular Communication, College of Medicine, Inha University, Incheon 22212, Korea
- Department of Molecular Medicine, College of Medicine, Inha University, Incheon 22212, Korea
- Program in Biomedical Science and Engineering, College of Medicine, Inha University, Incheon 22212, Korea
| | - Allison B. Herman
- Laboratory of Genetics and Genomics, National Institute on Aging-Intramural Research Program, NIH, Baltimore, MD 21224, USA
| | - Myriam Gorospe
- Laboratory of Genetics and Genomics, National Institute on Aging-Intramural Research Program, NIH, Baltimore, MD 21224, USA
| | - Jae-Seon Lee
- Research Center for Controlling Intercellular Communication, College of Medicine, Inha University, Incheon 22212, Korea
- Department of Molecular Medicine, College of Medicine, Inha University, Incheon 22212, Korea
- Program in Biomedical Science and Engineering, College of Medicine, Inha University, Incheon 22212, Korea
- Correspondence:
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6
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Role of p53 in Regulating Radiation Responses. LIFE (BASEL, SWITZERLAND) 2022; 12:life12071099. [PMID: 35888186 PMCID: PMC9319710 DOI: 10.3390/life12071099] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 07/15/2022] [Accepted: 07/16/2022] [Indexed: 12/12/2022]
Abstract
p53 is known as the guardian of the genome and plays various roles in DNA damage and cancer suppression. The p53 gene was found to express multiple p53 splice variants (isoforms) in a physiological, tissue-dependent manner. The various genes that up- and down-regulated p53 are involved in cell viability, senescence, inflammation, and carcinogenesis. Moreover, p53 affects the radioadaptive response. Given that several studies have already been published on p53, this review presents its role in the response to gamma irradiation by interacting with MDM2, NF-κB, and miRNA, as well as in the inflammation processes, senescence, carcinogenesis, and radiation adaptive responses. Finally, the potential of p53 as a biomarker is discussed.
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7
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Abdelgawad IY, Agostinucci K, Zordoky BN. Cardiovascular ramifications of therapy-induced endothelial cell senescence in cancer survivors. Biochim Biophys Acta Mol Basis Dis 2022; 1868:166352. [PMID: 35041996 PMCID: PMC8844223 DOI: 10.1016/j.bbadis.2022.166352] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 12/22/2021] [Accepted: 01/07/2022] [Indexed: 12/15/2022]
Abstract
Cancer survivorship has remarkably improved over the past decades; nevertheless, cancer survivors are burdened with multiple health complications primarily caused by their cancer therapy. Therapy-induced senescence is recognized as a fundamental mechanism contributing to adverse health complications in cancer survivors. In this mini-review, we will discuss the recent literature describing the mechanisms of cancer therapy-induced senescence. We will focus on endothelial cell senescence since it has been shown to be a key player in numerous cardiovascular complications. We will also discuss novel senotherapeutic approaches that have the potential to combat therapy-induced endothelial cell senescence.
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Affiliation(s)
- Ibrahim Y Abdelgawad
- Department of Experimental and Clinical Pharmacology, University of Minnesota College of Pharmacy, Minneapolis, MN 55455, USA.
| | - Kevin Agostinucci
- Department of Experimental and Clinical Pharmacology, University of Minnesota College of Pharmacy, Minneapolis, MN 55455, USA.
| | - Beshay N Zordoky
- Department of Experimental and Clinical Pharmacology, University of Minnesota College of Pharmacy, Minneapolis, MN 55455, USA.
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8
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Patil S, Reedy JL, Scroggins BT, White AO, Kwon S, Shankavaram U, López-Coral A, Chung EJ, Citrin DE. Senescence-associated tumor growth is promoted by 12-Lipoxygenase. Aging (Albany NY) 2022; 14:1068-1086. [PMID: 35158337 PMCID: PMC8876904 DOI: 10.18632/aging.203890] [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: 10/20/2021] [Accepted: 02/08/2022] [Indexed: 12/24/2022]
Abstract
Radiation therapy is a commonly used treatment modality for cancer. Although effective in providing local tumor control, radiation causes oxidative stress, inflammation, immunomodulatory and mitogenic cytokine production, extracellular matrix production, and premature senescence in lung parenchyma. The senescence associated secretory phenotype (SASP) can promote inflammation and stimulate alterations in the surrounding tissue. Therefore, we hypothesized that radiation-induced senescent parenchymal cells in irradiated lung would enhance tumor growth. Using a murine syngeneic tumor model of melanoma and non-small cell lung cancer lung metastasis, we demonstrate that radiation causes a significant increase in markers of premature senescence in lung parenchyma within 4 to 8 weeks. Further, injection of B16F0 (melanoma) or Lewis Lung carcinoma (epidermoid lung cancer) cells at these time points after radiation results in an increase in the number and size of pulmonary tumor nodules relative to unirradiated mice. Treatment of irradiated mice with a senolytic agent (ABT-737) or agents that prevent senescence (rapamycin, INK-128) was sufficient to reduce radiation-induced lung parenchymal senescence and to mitigate radiation-enhanced tumor growth. These agents abrogated radiation-induced expression of 12-Lipoxygenase (12-LOX), a molecule implicated in several deleterious effects of senescence. Deficiency of 12-LOX prevented radiation-enhanced tumor growth. Together, these data demonstrate the pro-tumorigenic role of radiation-induced senescence, introduces the dual TORC inhibitor INK-128 as an effective agent for prevention of radiation-induced normal tissue senescence, and identifies senescence-associated 12-LOX activity as an important component of the pro-tumorigenic irradiated tissue microenvironment. These studies suggest that combining senotherapeutic agents with radiotherapy may decrease post-therapy tumor growth.
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Affiliation(s)
- Shilpa Patil
- Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Jessica L Reedy
- Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Bradley T Scroggins
- Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Ayla O White
- Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Seokjoo Kwon
- Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Uma Shankavaram
- Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Alfonso López-Coral
- Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Eun Joo Chung
- Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
| | - Deborah E Citrin
- Radiation Oncology Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
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Abstract
Replicative senescence occurs due to an inability to repair DNA damage and activation of p53/p21 and p16INK4 pathways. It is considered a preventive mechanism for arresting proliferation of DNA-damaged cells. Stably senescent cells are characterized by a senescence-associated secretory phenotype (SASP), which produces and secretes cytokines, chemokines, and/or matrix metalloproteinases depending on the cell type. SASP proteins may increase cell proliferation, facilitating conversion of premalignant to malignant tumor cells, triggering DNA damage, and altering the tissue microenvironment. Further, senescent cells accumulate with age, thereby aggravating age-related tissue damage. Here, we review a heretofore unappreciated role for growth hormone (GH) as a SASP component, acting in an autocrine and paracrine fashion. In senescent cells, GH is activated by DNA-damage-induced p53 and inhibits phosphorylation of DNA repair proteins ATM, Chk2, p53, and H2AX. Somatotroph adenomas containing abundant intracellular GH exhibit increased somatic copy number alterations, indicative of DNA damage, and are associated with induced p53/p21. As this pathway restrains proliferation of DNA-damaged cells, these mechanisms may underlie the senescent phenotype and benign nature of slowly proliferating pituitary somatotroph adenomas. In highly proliferative cells, such as colon epithelial cells, GH induced in response to DNA damage suppresses p53, thereby triggering senescent cell proliferation. As senescent cells harbor unrepaired DNA damage, GH may enable senescent cells to evade senescence and reenter the cell cycle, resulting in acquisition of harmful mutations. These mechanisms, at least in part, may underlie pro-aging effects of GH observed in animal models and in patients with chronically elevated GH levels.
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Affiliation(s)
- Vera Chesnokova
- Pituitary Center, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
| | - Shlomo Melmed
- Pituitary Center, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048, USA
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10
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Transcriptomic profiling and pathway analysis of cultured human lung microvascular endothelial cells following ionizing radiation exposure. Sci Rep 2021; 11:24214. [PMID: 34930946 PMCID: PMC8688546 DOI: 10.1038/s41598-021-03636-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 12/06/2021] [Indexed: 12/25/2022] Open
Abstract
The vascular system is sensitive to radiation injury, and vascular damage is believed to play a key role in delayed tissue injury such as pulmonary fibrosis. However, the response of endothelial cells to radiation is not completely understood. We examined the response of primary human lung microvascular endothelial cells (HLMVEC) to 10 Gy (1.15 Gy/min) X-irradiation. HLMVEC underwent senescence (80-85%) with no significant necrosis or apoptosis. Targeted RT-qPCR showed increased expression of genes CDKN1A and MDM2 (10-120 min). Western blotting showed upregulation of p2/waf1, MDM2, ATM, and Akt phosphorylation (15 min-72 h). Low levels of apoptosis at 24-72 h were identified using nuclear morphology. To identify novel pathway regulation, RNA-seq was performed on mRNA using time points from 2 to 24 h post-irradiation. Gene ontology and pathway analysis revealed increased cell cycle inhibition, DNA damage response, pro- and anti- apoptosis, and pro-senescence gene expression. Based on published literature on inflammation and endothelial-to-mesenchymal transition (EndMT) pathway genes, we identified increased expression of pro-inflammatory genes and EndMT-associated genes by 24 h. Together our data reveal a time course of integrated gene expression and protein activation leading from early DNA damage response and cell cycle arrest to senescence, pro-inflammatory gene expression, and endothelial-to-mesenchymal transition.
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11
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Selvarani R, Mohammed S, Richardson A. Effect of rapamycin on aging and age-related diseases-past and future. GeroScience 2021; 43:1135-1158. [PMID: 33037985 PMCID: PMC8190242 DOI: 10.1007/s11357-020-00274-1] [Citation(s) in RCA: 114] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 09/21/2020] [Indexed: 12/19/2022] Open
Abstract
In 2009, rapamycin was reported to increase the lifespan of mice when implemented later in life. This observation resulted in a sea-change in how researchers viewed aging. This was the first evidence that a pharmacological agent could have an impact on aging when administered later in life, i.e., an intervention that did not have to be implemented early in life before the negative impact of aging. Over the past decade, there has been an explosion in the number of reports studying the effect of rapamycin on various diseases, physiological functions, and biochemical processes in mice. In this review, we focus on those areas in which there is strong evidence for rapamycin's effect on aging and age-related diseases in mice, e.g., lifespan, cardiac disease/function, central nervous system, immune system, and cell senescence. We conclude that it is time that pre-clinical studies be focused on taking rapamycin to the clinic, e.g., as a potential treatment for Alzheimer's disease.
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Affiliation(s)
- Ramasamy Selvarani
- Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Sabira Mohammed
- Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Arlan Richardson
- Department of Biochemistry & Molecular Biology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA.
- Oklahoma City VA Medical Center, Oklahoma City, OK, USA.
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12
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Abdelgawad IY, Sadak KT, Lone DW, Dabour MS, Niedernhofer LJ, Zordoky BN. Molecular mechanisms and cardiovascular implications of cancer therapy-induced senescence. Pharmacol Ther 2021; 221:107751. [PMID: 33275998 PMCID: PMC8084867 DOI: 10.1016/j.pharmthera.2020.107751] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Revised: 11/16/2020] [Accepted: 11/23/2020] [Indexed: 12/11/2022]
Abstract
Cancer treatment has been associated with accelerated aging that can lead to early-onset health complications typically experienced by older populations. In particular, cancer survivors have an increased risk of developing premature cardiovascular complications. In the last two decades, cellular senescence has been proposed as an important mechanism of premature cardiovascular diseases. Cancer treatments, specifically anthracyclines and radiation, have been shown to induce senescence in different types of cardiovascular cells. Additionally, clinical studies identified increased systemic markers of senescence in cancer survivors. Preclinical research has demonstrated the potential of several approaches to mitigate cancer therapy-induced senescence. However, strategies to prevent and/or treat therapy-induced cardiovascular senescence have not yet been translated to the clinic. In this review, we will discuss how therapy-induced senescence can contribute to cardiovascular complications. Thereafter, we will summarize the current in vitro, in vivo, and clinical evidence regarding cancer therapy-induced cardiovascular senescence. Then, we will discuss interventional strategies that have the potential to protect against therapy-induced cardiovascular senescence. To conclude, we will highlight challenges and future research directions to mitigate therapy-induced cardiovascular senescence in cancer survivors.
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Affiliation(s)
- Ibrahim Y Abdelgawad
- Department of Experimental and Clinical Pharmacology, University of Minnesota College of Pharmacy, Minneapolis, MN 55455, USA
| | - Karim T Sadak
- Department of Pediatrics, University of Minnesota Medical School, Minneapolis, MN 55455, USA; University of Minnesota Masonic Children's Hospital, Minneapolis, MN 55455, USA; University of Minnesota Masonic Cancer Center, Minneapolis, MN 55455, USA
| | - Diana W Lone
- University of Minnesota Masonic Children's Hospital, Minneapolis, MN 55455, USA
| | - Mohamed S Dabour
- Clinical Pharmacy Department, Faculty of Pharmacy, Tanta University, Tanta 31527, Egypt
| | - Laura J Niedernhofer
- Institute on the Biology of Aging and Metabolism and Department of Biochemistry, Molecular Biology and Biophysics, University of Minnesota Medical School, Minneapolis, MN 55455, USA
| | - Beshay N Zordoky
- Department of Experimental and Clinical Pharmacology, University of Minnesota College of Pharmacy, Minneapolis, MN 55455, USA.
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13
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Mungunsukh O, George J, McCart EA, Snow AL, Mattapallil JJ, Mog SR, Panganiban RAM, Bolduc DL, Rittase WB, Bouten RM, Day RM. Captopril reduces lung inflammation and accelerated senescence in response to thoracic radiation in mice. JOURNAL OF RADIATION RESEARCH 2021; 62:236-248. [PMID: 33616187 PMCID: PMC7948861 DOI: 10.1093/jrr/rraa142] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Revised: 07/31/2020] [Indexed: 05/10/2023]
Abstract
The lung is sensitive to radiation and exhibits several phases of injury, with an initial phase of radiation-induced pneumonitis followed by delayed and irreversible fibrosis. The angiotensin-converting enzyme inhibitor captopril has been demonstrated to mitigate radiation lung injury and to improve survival in animal models of thoracic irradiation, but the mechanism remains poorly understood. Here we investigated the effect of captopril on early inflammatory events in the lung in female CBA/J mice exposed to thoracic X-ray irradiation of 17-17.9 Gy (0.5-0.745 Gy min-1). For whole-body + thoracic irradiation, mice were exposed to 7.5 Gy (0.6 Gy min-1) total-body 60Co irradiation and 9.5 Gy thoracic irradiation. Captopril was administered orally (110 mg kg-1 day-1) in the drinking water, initiated 4 h through to150 days post-irradiation. Captopril treatment increased survival from thoracic irradiation to 75% at 150 days compared with 0% survival in vehicle-treated animals. Survival was characterized by a significant decrease in radiation-induced pneumonitis and fibrosis. Investigation of early inflammatory events showed that captopril significantly attenuated macrophage accumulation and decreased the synthesis of radiation-induced interleukin-1β (IL-1β) and tumor necrosis factor-α (TNF-α) pro-inflammatory cytokines in the lungs of irradiated mice. Suppression of IL-1β and TNF-α correlated with an increase of the anti-inflammatory cytokine IL-10 in the spleen with captopril treatment. We also found that captopril decreased markers for radiation-induced accelerated senescence in the lung tissue. Our data suggest that suppression of inflammation and senescence markers, combined with an increase of anti-inflammatory factors, are a part of the mechanism for captopril-induced survival in thoracic irradiated mice.
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Affiliation(s)
- Ognoon Mungunsukh
- Department of Pharmacology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Jeffy George
- Department of Pharmacology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Elizabeth A McCart
- Department of Pharmacology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Andrew L Snow
- Department of Pharmacology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Joseph J Mattapallil
- Department of Microbiology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Steven R Mog
- Center for Food Safety and Applied Nutrition, U.S. Food and Drug Administration, College Park, MD 20740, USA
| | - Ronald Allan M Panganiban
- Department of Pharmacology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - David L Bolduc
- Scientific Research Department, Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD 20889, USA
| | - W Bradley Rittase
- Department of Pharmacology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Roxane M Bouten
- Department of Pharmacology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Regina M Day
- Department of Pharmacology, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
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14
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IGF-1 Receptor Signaling Regulates Type II Pneumocyte Senescence and Resulting Macrophage Polarization in Lung Fibrosis. Int J Radiat Oncol Biol Phys 2020; 110:526-538. [PMID: 33385497 DOI: 10.1016/j.ijrobp.2020.12.035] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 12/15/2020] [Accepted: 12/22/2020] [Indexed: 11/22/2022]
Abstract
PURPOSE Type II pneumocyte (alveolar epithelial cells type II [AECII]) senescence has been implicated in the progression of lung fibrosis. The capacity of senescent cells to modulate pulmonary macrophages to drive fibrosis is unexplored. Insulin-like growth factor-1 receptor (IGF-1R) signaling has been implicated as a regulator of senescence and aging. METHODS AND MATERIALS Mice with an AECII-specific deletion of IGF-1R received thoracic irradiation (n ≥ 5 per condition), and the effect of IGF-1R deficiency on radiation-induced AECII senescence and macrophage polarization to an alternatively activated phenotype (M2) was investigated. IGF-1R signaling, macrophage polarization, and senescence were evaluated in surgically resected human lung (n = 63). RESULTS IGF-1R deficient mice demonstrated reduced AECII senescence (senescent AECII/field; intact: 7.25% ± 3.5% [mean ± SD], deficient: 2.75% ± 2.8%, P = .0001), reduced accumulation of M2 macrophages (intact: 24.7 ± 2.2 cells/field, deficient: 15.5 ± 1.2 cells/field, P = .0086), and fibrosis (hydroxyproline content; intact: 71.9 ± 21.7 μg/lung, deficient: 31.7 ± 7.9, P = .0485) after irradiation. Senescent AECII enhanced M2 polarization in a paracrine fashion (relative Arg1 mRNA, 0 Gy: 1.0 ± 0.4, 17.5 Gy: 7.34 ± 0.5, P < .0001). Evaluation of surgical samples from patients treated with chemoradiation demonstrated increased expression of IGF-1 (unirradiated: 10.2% ± 4.9% area, irradiated: 15.1% ± 11.5%, P = .0377), p21 (unirradiated: 0.013 ± 0.02 histoscore, irradiated: 0.084 ± 0.09 histoscore, P = .0002), IL-13 (unirradiated: 13.7% ± 2.8% area, irradiated: 21.7% ± 3.8%, P < .0001), and M2 macrophages in fibrotic regions relative to nonfibrotic regions (unirradiated: 11.4 ± 12.2 CD163 + cells/core, irradiated: 43.1 ± 40.9 cells/core, P = .0011), consistent with findings from animal models of lung fibrosis. CONCLUSIONS This study demonstrates that senescent AECII are necessary for the progression of pulmonary fibrosis and serve as a targetable, chronic stimuli for macrophage activation in fibrotic lung.
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15
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Laiakis EC, McCart EA, Deziel A, Rittase WB, Bouten RM, Jha J, Wilkins WL, Day RM, Fornace AJ. Effect of 3,3'-Diindolylmethane on Pulmonary Injury Following Thoracic Irradiation in CBA Mice. HEALTH PHYSICS 2020; 119:746-757. [PMID: 32384373 PMCID: PMC8579862 DOI: 10.1097/hp.0000000000001257] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The molecule 3,3'-diindolylmethane (DIM) is small, a major bioactive metabolite of indole-3 carbinol (13C), and a phytochemical compound from cruciferous vegetables released upon exposure to the gut acid environment. DIM is a proposed anti-cancer agent and was previously demonstrated to prevent radiation damage in the bone marrow and the gastrointestinal tract. Here we investigated the effect of DIM on radiation-induced injury to the lung in a murine model through untargeted metabolomics and gene expression studies of select genes. CBA mice were exposed to thoracic irradiation (17.5 Gy). Mice were treated with vehicle or DIM (250 mg kg, subcutaneous injection) on days -1 pre-irradiation through +14 post-irradiation. DIM induced a significant improvement in survival by day 150 post-irradiation. Fibrosis-related gene expression and metabolomics were examined using lung tissue from days 15, 45, 60, 90, and 120 post-irradiation. Our qRT-PCR experiments showed that DIM treatment reduced radiation-induced late expression of collagen Iα and the cell cycle checkpoint proteins p21/waf1 (CDKN1A) and p16ink (CDKN2A). Metabolomic studies of lung tissue demonstrated a significant dampening of radiation-induced changes following DIM treatment. Metabolites associated with pro-inflammatory responses and increased oxidative stress, such as fatty acids, were suppressed by DIM treatment compared to irradiated samples. Together these data suggest that DIM reduces radiation-induced sequelae in the lung.
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Affiliation(s)
- Evagelia C. Laiakis
- Department of Oncology, Georgetown University, Washington, DC 20057, USA
- Department of Biochemistry and Molecular & Cellular Oncology, Georgetown University, Washington, DC 20057, USA
| | - Elizabeth A. McCart
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Annabella Deziel
- Department of Oncology, Georgetown University, Washington, DC 20057, USA
| | - W. Bradley Rittase
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Roxane M. Bouten
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Jyoti Jha
- Current address: Rise Therapeutics, Rockville, MD 20850, USA
| | - W. Louis Wilkins
- Division of Comparative Pathology, the Armed Forces Radiobiology Research Institute/Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Regina M. Day
- Department of Pharmacology and Molecular Therapeutics, Uniformed Services University of the Health Sciences, Bethesda, MD 20814, USA
| | - Albert J. Fornace
- Department of Oncology, Georgetown University, Washington, DC 20057, USA
- Department of Biochemistry and Molecular & Cellular Oncology, Georgetown University, Washington, DC 20057, USA
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Obrador E, Salvador R, Villaescusa JI, Soriano JM, Estrela JM, Montoro A. Radioprotection and Radiomitigation: From the Bench to Clinical Practice. Biomedicines 2020; 8:E461. [PMID: 33142986 PMCID: PMC7692399 DOI: 10.3390/biomedicines8110461] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 10/27/2020] [Accepted: 10/29/2020] [Indexed: 02/07/2023] Open
Abstract
The development of protective agents against harmful radiations has been a subject of investigation for decades. However, effective (ideal) radioprotectors and radiomitigators remain an unsolved problem. Because ionizing radiation-induced cellular damage is primarily attributed to free radicals, radical scavengers are promising as potential radioprotectors. Early development of such agents focused on thiol synthetic compounds, e.g., amifostine (2-(3-aminopropylamino) ethylsulfanylphosphonic acid), approved as a radioprotector by the Food and Drug Administration (FDA, USA) but for limited clinical indications and not for nonclinical uses. To date, no new chemical entity has been approved by the FDA as a radiation countermeasure for acute radiation syndrome (ARS). All FDA-approved radiation countermeasures (filgrastim, a recombinant DNA form of the naturally occurring granulocyte colony-stimulating factor, G-CSF; pegfilgrastim, a PEGylated form of the recombinant human G-CSF; sargramostim, a recombinant granulocyte macrophage colony-stimulating factor, GM-CSF) are classified as radiomitigators. No radioprotector that can be administered prior to exposure has been approved for ARS. This differentiates radioprotectors (reduce direct damage caused by radiation) and radiomitigators (minimize toxicity even after radiation has been delivered). Molecules under development with the aim of reaching clinical practice and other nonclinical applications are discussed. Assays to evaluate the biological effects of ionizing radiations are also analyzed.
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Affiliation(s)
- Elena Obrador
- Department of Physiology, Faculty of Medicine and Odontology, University of Valencia, 46010 Valencia, Spain; (E.O.); (R.S.); (J.M.E.)
| | - Rosario Salvador
- Department of Physiology, Faculty of Medicine and Odontology, University of Valencia, 46010 Valencia, Spain; (E.O.); (R.S.); (J.M.E.)
| | - Juan I. Villaescusa
- Service of Radiological Protection, Clinical Area of Medical Image, La Fe University Hospital, 46026 Valencia, Spain;
- Biomedical Imaging Research Group GIBI230, Health Research Institute (IISLaFe), La Fe University Hospital, 46026 Valencia, Spain
| | - José M. Soriano
- Food & Health Lab, Institute of Materials Science, University of Valencia, 46980 Valencia, Spain;
- Joint Research Unit in Endocrinology, Nutrition and Clinical Dietetics, University of Valencia-Health Research Institute IISLaFe, 46026 Valencia, Spain
| | - José M. Estrela
- Department of Physiology, Faculty of Medicine and Odontology, University of Valencia, 46010 Valencia, Spain; (E.O.); (R.S.); (J.M.E.)
| | - Alegría Montoro
- Service of Radiological Protection, Clinical Area of Medical Image, La Fe University Hospital, 46026 Valencia, Spain;
- Biomedical Imaging Research Group GIBI230, Health Research Institute (IISLaFe), La Fe University Hospital, 46026 Valencia, Spain
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Zhao LD, Bie LY, Hu L, Zhu ZH, Meng XH, Cong LL, Zhang S, Ma N, Xiao JH. IGF-1 induces cellular senescence in rat articular chondrocytes via Akt pathway activation. Exp Ther Med 2020; 20:49. [PMID: 32952639 PMCID: PMC7480142 DOI: 10.3892/etm.2020.9177] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Accepted: 06/20/2019] [Indexed: 12/13/2022] Open
Abstract
Cellular senescence decreases cell proliferation over time and is characterized by typical markers, including larger cell volume, a flattened morphology, irreversible cell cycle arrest, augmentation of senescence-associated β-galactosidase (SA-β-gal) activity and senescence-associated secretory phenotype. A variety of factors are implicated in the process of cellular aging, which mediates an organisms' lifespan. Insulin-like growth factor-1 (IGF-1) serves an essential role in regulating cell growth, division, proliferation and senescence. In the present study, the role of IGF-1 and the downstream Akt signaling pathway in rat articular chondrocyte senescence was assessed. The results of the current study demonstrated that IGF-1 promoted cellular senescence in rat articular chondrocytes via activation of SA-β-gal and the upregulation of p53 and p21 mRNA and protein levels. IGF-1 enhanced Akt phosphorylation and treatment with Akt inhibitor, MK-2206, significantly suppressed the induction of these markers. Overall, the results indicated the involvement of IGF-1 and Akt in senescence exhibited by rat articular chondrocytes.
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Affiliation(s)
- Li-Dong Zhao
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Lian-Yu Bie
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Lan Hu
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Zi-Han Zhu
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Xing-Hua Meng
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Lin-Lin Cong
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Shai Zhang
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Ning Ma
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Jian-Hua Xiao
- Heilongjiang Key Laboratory for Laboratory Animals and Comparative Medicine, College of Veterinary Medicine, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
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18
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Zeng ZM, Du HY, Xiong L, Zeng XL, Zhang P, Cai J, Huang L, Liu AW. BRCA1 protects cardiac microvascular endothelial cells against irradiation by regulating p21-mediated cell cycle arrest. Life Sci 2020; 244:117342. [PMID: 31978450 DOI: 10.1016/j.lfs.2020.117342] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 01/12/2020] [Accepted: 01/20/2020] [Indexed: 12/14/2022]
Abstract
AIMS Microvascular endothelial cell dysfunction is a leading cause of radiation-induced heart disease (RIHD). BRCA1 plays an important role in DNA damage repair. The study aims to explore the effect of BRCA1 in endothelial cells involved in RIHD. MATERIALS AND METHODS BRCA1 and p21 expression were detected in human umbilical vein endothelial cells (HUVECs) and in mouse heart tissue after irradiation exposure. The effects of BRCA1 on cell proliferation, cell cycle and radiosensitivity were determined in HUVECs with overexpression and knockdown of BRCA1. A mouse model of RIHD was established. Heart damage was detected in C57BL/6J mice and endothelial cell specific knockout BRCA1 mice (EC-BRCA1-/-). KEY FINDINGS BRCA1 and p21 expression was significantly increased both in vitro and vivo response to irradiation. BRCA1 overexpression in endothelial cells enhanced cell growth and G1/S phase arrest, and the opposite results were observed in BRCA1 knockdown endothelial cells. BRCA1 downregulated endothelial cell cycle-related genes cyclin A, cyclin D1, cyclin E and p-Rb through increasing p21 expression, and HUVECs with BRCA1 gene knockdown were more sensitive to radiation. In vivo, a decrease in cardiac microvascular density, as well as cardiomyocyte hypoxia and apoptosis were observed in a time-dependent manner. EC-BRCA1-/- mice were more prone to severe RIHD than EC-BRCA1+/- mice after 16Gy radiation exposure due to endothelial dysfunction caused by loss of BRCA1, and p21 was declined in EC-BRCA1-/- mice heart. SIGNIFICANCE These findings indicate that BRCA1 plays a protective role in RIHD by regulating endothelial cell cycle arrest mediated by p21 signal.
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Affiliation(s)
- Zhi-Min Zeng
- Department of Oncology, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, PR China; Jiangxi Key Laboratory of Clinical Translational Cancer Research, Nanchang, Jiangxi Province, PR China
| | - Hai-Yang Du
- Department of Oncology, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, PR China; Jiangxi Key Laboratory of Clinical Translational Cancer Research, Nanchang, Jiangxi Province, PR China
| | - Le Xiong
- Department of Oncology, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, PR China; Jiangxi Key Laboratory of Clinical Translational Cancer Research, Nanchang, Jiangxi Province, PR China
| | - Xiao-Li Zeng
- Department of Oncology, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, PR China
| | - Peng Zhang
- Department of Radiation Oncology, Zhejiang Key Laboratory of Radiation Oncology, Zhejiang Cancer Hospital, Hangzhou, PR China
| | - Jing Cai
- Department of Oncology, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, PR China
| | - Long Huang
- Department of Oncology, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, PR China; Jiangxi Key Laboratory of Clinical Translational Cancer Research, Nanchang, Jiangxi Province, PR China.
| | - An-Wen Liu
- Department of Oncology, The Second Affiliated Hospital of Nanchang University, Nanchang, Jiangxi Province, PR China; Jiangxi Key Laboratory of Clinical Translational Cancer Research, Nanchang, Jiangxi Province, PR China.
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19
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Beach TA, Groves AM, Williams JP, Finkelstein JN. Modeling radiation-induced lung injury: lessons learned from whole thorax irradiation. Int J Radiat Biol 2020; 96:129-144. [PMID: 30359147 PMCID: PMC6483900 DOI: 10.1080/09553002.2018.1532619] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 09/12/2018] [Accepted: 09/13/2018] [Indexed: 12/25/2022]
Abstract
Models of thoracic irradiation have been developed as clinicians and scientists have attempted to decipher the events that led up to the pulmonary toxicity seen in human subjects following radiation treatment. The most common model is that of whole thorax irradiation (WTI), applied in a single dose. Mice, particularly the C57BL/6J strain, has been frequently used in these investigations, and has greatly informed our current understanding of the initiation and progression of radiation-induced lung injury (RILI). In this review, we highlight the sequential progression and dynamic nature of RILI, focusing primarily on the vast array of information that has been gleaned from the murine model. Ample evidence indicates a wide array of biological responses that can be seen following irradiation, including DNA damage, oxidative stress, cellular senescence and inflammation, all triggered by the initial exposure to ionizing radiation (IR) and heterogeneously maintained throughout the temporal progression of injury, which manifests as acute pneumonitis and later fibrosis. It appears that the early responses of specific cell types may promote further injury, disrupting the microenvironment and preventing a return to homeostasis, although the exact mechanisms driving these responses remains somewhat unclear. Attempts to either prevent or treat RILI in preclinical models have shown some success by targeting these disparate radiobiological processes. As our understanding of the dynamic cellular responses to radiation improves through the use of such models, so does the likelihood of preventing or treating RILI.
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Affiliation(s)
- Tyler A. Beach
- Department of Environmental Medicine, University of Rochester Medical Center, Rochester, NY 14642
- These authors contributed equally to this publication
| | - Angela M. Groves
- Department of Pediatrics and Neonatology, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642
- These authors contributed equally to this publication
| | - Jacqueline P. Williams
- Department of Environmental Medicine, University of Rochester Medical Center, Rochester, NY 14642
- Department of Radiation Oncology, University of Rochester Medical Center, Rochester, NY 14642
| | - Jacob N. Finkelstein
- Department of Environmental Medicine, University of Rochester Medical Center, Rochester, NY 14642
- Department of Pediatrics and Neonatology, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642
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20
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Sarfstein R, Yeheskel A, Sinai-Livne T, Pasmanik-Chor M, Werner H. Systems Analysis of Insulin and IGF1 Receptors Networks in Breast Cancer Cells Identifies Commonalities and Divergences in Expression Patterns. Front Endocrinol (Lausanne) 2020; 11:435. [PMID: 32733384 PMCID: PMC7359857 DOI: 10.3389/fendo.2020.00435] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Accepted: 06/02/2020] [Indexed: 11/13/2022] Open
Abstract
Insulin and insulin-like growth factor-1 (IGF1), acting respectively via the insulin (INSR) and IGF1 (IGF1R) receptors, play key developmental and metabolic roles throughout life. In addition, both signaling pathways fulfill important roles in cancer initiation and progression. The present study was aimed at identifying mechanistic differences between INSR and IGF1R using a recently developed bioinformatics tool, the Biological Network Simulator (BioNSi). This application allows to import and merge multiple pathways and interaction information from the KEGG database into a single network representation. The BioNsi network simulation tool allowed us to exploit the availability of gene expression data derived from breast cancer cell lines with specific disruptions of the INSR or IGF1R genes in order to investigate potential differences in protein expression that might be linked to biological attributes of the specific receptor networks. Modeling-generated information was corroborated by experimental and biological assays. BioNSi analyses revealed that the expression of 75 and 71 genes changed during simulation of IGF1R-KD and INSR-KD, compared to control cells, respectively. Out of 16 proteins that BioNSi analysis was based on, validated by Western blotting, nine were shown to be involved in DNA repair, eight in cell cycle checkpoints, six in proliferation, eight in apoptosis, seven in oxidative stress, six in cell migration, two in energy homeostasis, and three in senescence. Taken together, analyses identified a number of commonalities and, most importantly, dissimilarities between the IGF1R and INSR pathways that might help explain the basis for the biological differences between these networks.
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MESH Headings
- Antigens, CD/genetics
- Antigens, CD/metabolism
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- Breast Neoplasms/genetics
- Breast Neoplasms/metabolism
- Breast Neoplasms/pathology
- Female
- Gene Expression Profiling
- Gene Expression Regulation, Neoplastic
- Gene Regulatory Networks
- Humans
- Receptor, IGF Type 1/antagonists & inhibitors
- Receptor, IGF Type 1/genetics
- Receptor, IGF Type 1/metabolism
- Receptor, Insulin/antagonists & inhibitors
- Receptor, Insulin/genetics
- Receptor, Insulin/metabolism
- Systems Analysis
- Tumor Cells, Cultured
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Affiliation(s)
- Rive Sarfstein
- Department of Human Molecular Genetics and Biochemistry, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Adva Yeheskel
- Bioinformatics Unit, George Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel
| | - Tali Sinai-Livne
- Department of Human Molecular Genetics and Biochemistry, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Metsada Pasmanik-Chor
- Bioinformatics Unit, George Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv, Israel
- *Correspondence: Metsada Pasmanik-Chor
| | - Haim Werner
- Department of Human Molecular Genetics and Biochemistry, Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
- Yoran Institute for Human Genome Research, Tel Aviv University, Tel Aviv, Israel
- Haim Werner
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21
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Bylicky MA, Mueller GP, Day RM. Radiation resistance of normal human astrocytes: the role of non-homologous end joining DNA repair activity. JOURNAL OF RADIATION RESEARCH 2019; 60:37-50. [PMID: 30423138 PMCID: PMC6373697 DOI: 10.1093/jrr/rry084] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 08/03/2018] [Indexed: 05/27/2023]
Abstract
Radiotherapy is a common modality for treatment of brain cancers, but it can induce long-term physiological and cognitive deficits. The responses of normal human brain cells to radiation is not well understood. Astrocytes have been shown to have a variety of protective mechanisms against oxidative stress and have been shown to protect neurons. We investigated the response of cultured normal human astrocytes (NHAs) to X-ray irradiation. Following exposure to 10 Gy X-irradiation, NHAs exhibited DNA damage as indicated by the formation of γ-H2AX foci. Western blotting showed that NHAs displayed a robust increase in expression of non-homologous end joining DNA repair enzymes within 15 min post-irradiation and increased expression of homologous recombination DNA repair enzymes ~2 h post-irradiation. The cell cycle checkpoint protein p21/waf1 was upregulated from 6-24 h, and then returned to baseline. Levels of DNA repair enzymes returned to basal ~48 h post-irradiation. NHAs re-entered the cell cycle and proliferation was observed at 6 days. In contrast, normal human mesenchymal stem cells (MSCs) failed to upregulate DNA repair enzymes and instead displayed sustained upregulation of p21/waf1, a cell cycle checkpoint marker for senescence. Ectopic overexpression of Ku70 was sufficient to protect MSCs from sustained upregulation of p21/waf1 induced by 10 Gy X-rays. These findings suggest that increased expression of Ku70 may be a key mechanism for the radioresistance of NHAs, preventing their accelerated senescence from high-dose radiation. These results may have implications for the development of novel targets for radiation countermeasure development.
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Affiliation(s)
- Michelle A Bylicky
- Department of Anatomy, Physiology, and Genetics, The Uniformed Services University of the Health Sciences, Jones Bridge Road, Bethesda, MD, USA
| | - Gregory P Mueller
- Department of Anatomy, Physiology, and Genetics, The Uniformed Services University of the Health Sciences, Jones Bridge Road, Bethesda, MD, USA
| | - Regina M Day
- Department of Pharmacology and Molecular Therapeutics, The Uniformed Services University of the Health Sciences, Jones Bridge Road, Bethesda, MD, USA
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22
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Samadi P, Afshar S, Amini R, Najafi R, Mahdavinezhad A, Sedighi Pashaki A, Gholami MH, Saidijam M. Let‐7e enhances the radiosensitivity of colorectal cancer cells by directly targeting insulin‐like growth factor 1 receptor. J Cell Physiol 2018; 234:10718-10725. [DOI: 10.1002/jcp.27742] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2018] [Accepted: 10/22/2018] [Indexed: 12/18/2022]
Affiliation(s)
- Pouria Samadi
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences Hamadan Iran
| | - Saeid Afshar
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences Hamadan Iran
| | - Razieh Amini
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences Hamadan Iran
| | - Rezvan Najafi
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences Hamadan Iran
| | - Ali Mahdavinezhad
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences Hamadan Iran
| | | | | | - Massoud Saidijam
- Research Center for Molecular Medicine, Hamadan University of Medical Sciences Hamadan Iran
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23
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Kim JH, Jenrow KA, Brown SL. Novel biological strategies to enhance the radiation therapeutic ratio. Radiat Oncol J 2018; 36:172-181. [PMID: 30309208 PMCID: PMC6226138 DOI: 10.3857/roj.2018.00332] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 08/29/2018] [Indexed: 02/06/2023] Open
Abstract
Successful anticancer strategies require a differential response between tumor and normal tissue (i.e., a therapeutic ratio). In fact, improving the effectiveness of a cancer therapeutic is of no clinical value in the absence of a significant increase in the differential response between tumor and normal tissue. Although radiation dose escalation with the use of intensity modulated radiation therapy has permitted the maximum tolerable dose for most locally advanced cancers, improvements in tumor control without damaging normal adjacent tissues are needed. As a means of increasing the therapeutic ratio, several new approaches are under development. Drugs targeting signal transduction pathways in cancer progression and more recently, immunotherapeutics targeting specific immune cell subsets have entered the clinic with promising early results. Radiobiological research is underway to address pressing questions as to the dose per fraction, irradiated tumor volume and time sequence of the drug administration. To exploit these exciting novel strategies, a better understanding is needed of the cellular and molecular pathways responsible for both cancer and normal tissue and organ response, including the role of radiation-induced accelerated senescence. This review will highlight the current understanding of promising biologically targeted therapies to enhance the radiation therapeutic ratio.
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Affiliation(s)
- Jae Ho Kim
- Department of Radiation Oncology, Henry Ford Hospital, Detroit, MI, USA
| | - Kenneth A Jenrow
- Department of Psychology/Neuroscience Program, Central Michigan University, Mount Pleasant, MI, USA
| | - Stephen L Brown
- Department of Radiation Oncology, Henry Ford Hospital, Detroit, MI, USA
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24
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Nguyen HQ, To NH, Zadigue P, Kerbrat S, De La Taille A, Le Gouvello S, Belkacemi Y. Ionizing radiation-induced cellular senescence promotes tissue fibrosis after radiotherapy. A review. Crit Rev Oncol Hematol 2018; 129:13-26. [PMID: 30097231 DOI: 10.1016/j.critrevonc.2018.06.012] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Revised: 06/08/2018] [Accepted: 06/15/2018] [Indexed: 02/06/2023] Open
Abstract
Ionizing radiation-exposure induces a variety of cellular reactions, such as senescence and apoptosis. Senescence is a permanent arrest state of the cell division, which can be beneficial or detrimental for normal tissue via an inflammatory response and senescence-associated secretion phenotype. Damage to healthy cells and their microenvironment is considered as an important source of early and late complications with an increased risk of morbidity in patients after radiotherapy (RT). In addition, the benefit/risk ratio may depend on the radiation technique/dose used for cancer eradication and the irradiated volume of healthy tissues. For radiation-induced fibrosis risk, the knowledge of mechanisms and potential prevention has become a crucial point to determining radiation parameters and patients' intrinsic radiosensitivity. This review summarizes our understanding of ionizing radiation-induced senescent cell in fibrogenesis. This mechanism may provide new insights for therapeutic modalities for better risk/benefit ratios after RT in the new era of personalized treatments.
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Affiliation(s)
- Hoang Quy Nguyen
- University of Paris Saclay, University of Paris Est Créteil (UPEC), France, University of Medicine and Pharmacy, Ho Chi Minh City, Viet Nam; INSERM U955 Team 07, Créteil, France
| | - Nhu Hanh To
- INSERM U955 Team 07, Créteil, France; APHP, Department of Radiation Oncology and Henri Mondor Breast Cancer and, Henri Mondor University Hospital, University of Paris Est Créteil (UPEC), France
| | | | - Stéphane Kerbrat
- INSERM U955 Team 04, University of Paris Est Créteil (UPEC), France
| | - Alexandre De La Taille
- INSERM U955 Team 07, Créteil, France; APHP, Department of Urology, Henri Mondor University Hospital, University of Paris Est Créteil (UPEC), Créteil, France
| | - Sabine Le Gouvello
- INSERM U955 Team 04, University of Paris Est Créteil (UPEC), France; APHP, Department of Biology & Pathology, Henri Mondor University Hospital, University of Paris Est Créteil (UPEC), Créteil, France
| | - Yazid Belkacemi
- INSERM U955 Team 07, Créteil, France; APHP, Department of Radiation Oncology and Henri Mondor Breast Cancer and, Henri Mondor University Hospital, University of Paris Est Créteil (UPEC), France.
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25
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Guipaud O, Jaillet C, Clément-Colmou K, François A, Supiot S, Milliat F. The importance of the vascular endothelial barrier in the immune-inflammatory response induced by radiotherapy. Br J Radiol 2018; 91:20170762. [PMID: 29630386 DOI: 10.1259/bjr.20170762] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Altered by ionising radiation, the vascular network is considered as a prime target to limit normal tissue damage and improve tumour control in radiotherapy (RT). Irradiation damages and/or activates endothelial cells, which then participate in the recruitment of circulating cells, especially by overexpressing cell adhesion molecules, but also by other as yet unknown mechanisms. Radiation-induced lesions are associated with infiltration of immune-inflammatory cells from the blood and/or the lymph circulation. Damaged cells from the tissues and immune-inflammatory resident cells release factors that attract cells from the circulation, leading to the restoration of tissue balance by fighting against infection, elimination of damaged cells and healing of the injured area. In normal tissues that surround the tumours, the development of an immune-inflammatory reaction in response to radiation-induced tissue injury can turn out to be chronic and deleterious for the organ concerned, potentially leading to fibrosis and/or necrosis of the irradiated area. Similarly, tumours can elicit an immune-inflammation reaction, which can be initialised and amplified by cancer therapy such as radiotherapy, although immune checkpoints often allow many cancers to be protected by inhibiting the T-cell signal. Herein, we have explored the involvement of vascular endothelium in the fate of healthy tissues and tumours undergoing radiotherapy. This review also covers current investigations that take advantage of the radiation-induced response of the vasculature to spare healthy tissue and/or target tumours better.
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Affiliation(s)
- Olivier Guipaud
- 1 Human Health Department, Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-SANTE, SERAMED, LRMed , Fontenay-aux-Roses , France
| | - Cyprien Jaillet
- 1 Human Health Department, Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-SANTE, SERAMED, LRMed , Fontenay-aux-Roses , France
| | - Karen Clément-Colmou
- 2 Département de Radiothérapie, Institut de Cancérologie de l'Ouest , Nantes St-Herblain , France.,3 Oncology and New Concept in Oncology Department, Centre de Recherche en Cancérologie et Immunologie Nantes-Angers (CRCiNA), Unité U1232, Institut de Recherche en Santé de l'Université de Nantes , Nantes , France
| | - Agnès François
- 1 Human Health Department, Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-SANTE, SERAMED, LRMed , Fontenay-aux-Roses , France
| | - Stéphane Supiot
- 2 Département de Radiothérapie, Institut de Cancérologie de l'Ouest , Nantes St-Herblain , France.,3 Oncology and New Concept in Oncology Department, Centre de Recherche en Cancérologie et Immunologie Nantes-Angers (CRCiNA), Unité U1232, Institut de Recherche en Santé de l'Université de Nantes , Nantes , France
| | - Fabien Milliat
- 1 Human Health Department, Institut de Radioprotection et de Sûreté Nucléaire (IRSN), PSE-SANTE, SERAMED, LRMed , Fontenay-aux-Roses , France
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26
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Friedrich CC, Lin Y, Krannich A, Wu Y, Vacanti JP, Neville CM. Enhancing engineered vascular networks in vitro and in vivo: The effects of IGF1 on vascular development and durability. Cell Prolif 2017; 51. [PMID: 29110360 DOI: 10.1111/cpr.12387] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2016] [Accepted: 07/21/2017] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVES Creation of functional, durable vasculature remains an important goal within the field of regenerative medicine. Engineered biological vasculature has the potential to restore or improve human tissue function. We hypothesized that the pleotropic effects of insulin-like growth factor 1 (IGF1) would enhance the engineering of capillary-like vasculature. MATERIALS AND METHODS The impact of IGF1 upon vasculogenesis was examined in in vitro cultures for a period of up to 40 days and as subcutaneous implants within immunodeficient mice. Co-cultures of human umbilical vein endothelial cells and human bone marrow-derived mesenchymal stem cells in collagen-fibronectin hydrogels were supplemented with either recombinant IGF1 protein or genetically engineered cells to provide sustained IGF1. Morphometric analysis was performed on the vascular networks that formed in four concentrations of IGF1. RESULTS IGF1 supplementation significantly enhanced de novo vasculogenesis both in vitro and in vivo. Effects were long-term as they lasted the duration of the study period, and included network density, vessel length, and diameter. Bifurcation density was not affected. However, the highest concentrations of IGF1 tested were either ineffective or even deleterious. Sustained IGF1 delivery was required in vivo as the inclusion of recombinant IGF1 protein had minimal impact. CONCLUSION IGF1 supplementation can be used to produce neovasculature with significantly enhanced network density and durability. Its use is a promising methodology for engineering de novo vasculature to support regeneration of functional tissue.
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Affiliation(s)
- Claudia C Friedrich
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA, USA.,Department of Surgery, Massachusetts General Hospital, Boston, MA, USA.,Department of Anesthesiology and Intensive Care Medicine, Campus Virchow Klinikum and Campus Charité Mitte, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Yunfeng Lin
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA, USA.,Department of Orthopaedics, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.,State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University, Chengdu, China
| | - Alexander Krannich
- Department of Biostatistics, Clinical Research Unit, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Yinan Wu
- Department of Biostatistics, Clinical Research Unit, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Joseph P Vacanti
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA, USA.,Department of Surgery, Massachusetts General Hospital, Boston, MA, USA
| | - Craig M Neville
- Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA, USA.,Department of Surgery, Massachusetts General Hospital, Boston, MA, USA.,Department of Orthopaedics, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
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27
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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. JOURNAL OF RADIATION RESEARCH 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] [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.
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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
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28
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Lafargue A, Degorre C, Corre I, Alves-Guerra MC, Gaugler MH, Vallette F, Pecqueur C, Paris F. Ionizing radiation induces long-term senescence in endothelial cells through mitochondrial respiratory complex II dysfunction and superoxide generation. Free Radic Biol Med 2017; 108:750-759. [PMID: 28431961 DOI: 10.1016/j.freeradbiomed.2017.04.019] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Revised: 04/01/2017] [Accepted: 04/16/2017] [Indexed: 12/18/2022]
Abstract
Ionizing radiation causes oxidative stress, leading to acute and late cellular responses. We previously demonstrated that irradiation of non-proliferating endothelial cells, as observed in normal tissues, induces early apoptosis, which can be inhibited by pretreatment with Sphingosine-1-Phosphate. We now propose to better characterize the long-term radiation response of endothelial cells by studying the molecular pathways associated with senescence and its link with acute apoptosis. First, senescence was validated in irradiated quiescent microvascular HMVEC-L in a dose- and time-dependent manner by SA β-galactosidase staining, p16Ink4a and p21Waf1 expression, pro-inflammatory IL-8 secretion and DNA damage response activation. This premature aging was induced independently of Sphingosine 1-Phosphate treatment, supporting its non-connection with acute IR-induced apoptosis. Then, senescence under these conditions showed persistent activation of p53 pathway and mitochondrial dysfunctions, characterized by O2·- generation, inhibition of respiratory complex II activity and over-expression of SOD2 and GPX1 detoxification enzymes. Senescence was significantly inhibited by treatment with pifithrin-α, a p53 inhibitor, or by MnTBAP, a superoxide dismutase mimetic, validating those molecular actors in IR-induced endothelial cell aging. However, MnTBAP, but not pifithrin-α, was able to limit superoxide generation and to rescue the respiratory complex II activity. Furthermore, MnTBAP was not modulating p53 up-regulation, suggesting that IR-induced senescence in quiescent endothelial cells is provided by at least 2 different pathways dependent of the mitochondrial oxidative stress response and the p53 activation. Further characterization of the actors involved in the respiratory complex II dysfunction will open new pharmacological strategies to modulate late radiation toxicity.
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Affiliation(s)
| | | | - Isabelle Corre
- CRCINA, INSERM, CNRS, Université de Nantes, Nantes, France
| | - Marie-Clotilde Alves-Guerra
- Inserm UMR1016, Paris F-75014, France; CNRS UMR8104, Paris F-75014, France; Université Paris Descartes, Paris F-75014, France
| | | | - François Vallette
- CRCINA, INSERM, CNRS, Université de Nantes, Nantes, France; Institut de Cancérologie de l'Ouest, Saint-Herblain F-44800, France
| | | | - François Paris
- CRCINA, INSERM, CNRS, Université de Nantes, Nantes, France; Institut de Cancérologie de l'Ouest, Saint-Herblain F-44800, France.
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29
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Beach TA, Johnston CJ, Groves AM, Williams JP, Finkelstein JN. Radiation induced pulmonary fibrosis as a model of progressive fibrosis: Contributions of DNA damage, inflammatory response and cellular senescence genes. Exp Lung Res 2017; 43:134-149. [PMID: 28534660 DOI: 10.1080/01902148.2017.1318975] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Purpose/Aim of Study: Studies of pulmonary fibrosis (PF) have resulted in DNA damage, inflammatory response, and cellular senescence being widely hypothesized to play a role in the progression of the disease. Utilizing these aforementioned terms, genomics databases were interrogated along with the term, "pulmonary fibrosis," to identify genes common among all 4 search terms. Findings were compared to data derived from a model of radiation-induced progressive pulmonary fibrosis (RIPF) to verify that these genes are similarly expressed, supporting the use of radiation as a model for diseases involving PF, such as human idiopathic pulmonary fibrosis (IPF). MATERIALS AND METHODS In an established model of RIPF, C57BL/6J mice were exposed to 12.5 Gy thorax irradiation and sacrificed at 24 hours, 1, 4, 12, and 32 weeks following exposure, and lung tissue was compared to age-matched controls by RNA sequencing. RESULTS Of 176 PF associated gene transcripts identified by database interrogation, 146 (>82%) were present in our experimental model, throughout the progression of RIPF. Analysis revealed that nearly 85% of PF gene transcripts were associated with at least 1 other search term. Furthermore, of 22 genes common to all four terms, 16 were present experimentally in RIPF. CONCLUSIONS This illustrates the validity of RIPF as a model of progressive PF/IPF based on the numbers of transcripts reported in both literature and observed experimentally. Well characterized genes and proteins are implicated in this model, supporting the hypotheses that DNA damage, inflammatory response and cellular senescence are associated with the pathogenesis of PF.
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Affiliation(s)
- Tyler A Beach
- a Department of Environmental Medicine , University of Rochester Medical Center , Rochester , New York , USA
| | - Carl J Johnston
- a Department of Environmental Medicine , University of Rochester Medical Center , Rochester , New York , USA.,b Department of Pediatrics and Neonatology , University of Rochester School of Medicine and Dentistry , Rochester , New York , USA
| | - Angela M Groves
- b Department of Pediatrics and Neonatology , University of Rochester School of Medicine and Dentistry , Rochester , New York , USA
| | - Jacqueline P Williams
- a Department of Environmental Medicine , University of Rochester Medical Center , Rochester , New York , USA
| | - Jacob N Finkelstein
- a Department of Environmental Medicine , University of Rochester Medical Center , Rochester , New York , USA.,b Department of Pediatrics and Neonatology , University of Rochester School of Medicine and Dentistry , Rochester , New York , USA
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30
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López IP, Piñeiro-Hermida S, Pais RS, Torrens R, Hoeflich A, Pichel JG. Involvement of Igf1r in Bronchiolar Epithelial Regeneration: Role during Repair Kinetics after Selective Club Cell Ablation. PLoS One 2016; 11:e0166388. [PMID: 27861515 PMCID: PMC5115747 DOI: 10.1371/journal.pone.0166388] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 10/27/2016] [Indexed: 12/14/2022] Open
Abstract
Regeneration of lung epithelium is vital for maintaining airway function and integrity. An imbalance between epithelial damage and repair is at the basis of numerous chronic lung diseases such as asthma, COPD, pulmonary fibrosis and lung cancer. IGF (Insulin-like Growth Factors) signaling has been associated with most of these respiratory pathologies, although their mechanisms of action in this tissue remain poorly understood. Expression profiles analyses of IGF system genes performed in mouse lung support their functional implication in pulmonary ontogeny. Immuno-localization revealed high expression levels of Igf1r (Insulin-like Growth Factor 1 Receptor) in lung epithelial cells, alveolar macrophages and smooth muscle. To further understand the role of Igf1r in pulmonary homeostasis, two distinct lung epithelial-specific Igf1r mutant mice were generated and studied. The lack of Igf1r disturbed airway epithelial differentiation in adult mice, and revealed enhanced proliferation and altered morphology in distal airway club cells. During recovery after naphthalene-induced club cell injury, the kinetics of terminal bronchiolar epithelium regeneration was hindered in Igf1r mutants, revealing increased proliferation and delayed differentiation of club and ciliated cells. Amid airway restoration, lungs of Igf1r deficient mice showed increased levels of Igf1, Insr, Igfbp3 and epithelial precursor markers, reduced amounts of Scgb1a1 protein, and alterations in IGF signaling mediators. These results support the role of Igf1r in controlling the kinetics of cell proliferation and differentiation during pulmonary airway epithelial regeneration after injury.
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Affiliation(s)
- Icíar P López
- Centro de Investigación Biomédica de la Rioja (CIBIR), Fundación Rioja Salud, Logroño, Spain
| | - Sergio Piñeiro-Hermida
- Centro de Investigación Biomédica de la Rioja (CIBIR), Fundación Rioja Salud, Logroño, Spain
| | - Rosete S Pais
- Centro de Investigación Biomédica de la Rioja (CIBIR), Fundación Rioja Salud, Logroño, Spain
| | - Raquel Torrens
- Centro de Investigación Biomédica de la Rioja (CIBIR), Fundación Rioja Salud, Logroño, Spain
| | - Andreas Hoeflich
- Institute of Genome Biology, Leibniz-Institute for Farm Animal Biology (FBN), Dummerstorf, Germany
| | - José G Pichel
- Centro de Investigación Biomédica de la Rioja (CIBIR), Fundación Rioja Salud, Logroño, Spain
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31
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Chung EJ, Sowers A, Thetford A, McKay-Corkum G, Chung SI, Mitchell JB, Citrin DE. Mammalian Target of Rapamycin Inhibition With Rapamycin Mitigates Radiation-Induced Pulmonary Fibrosis in a Murine Model. Int J Radiat Oncol Biol Phys 2016; 96:857-866. [PMID: 27663762 DOI: 10.1016/j.ijrobp.2016.07.026] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 07/18/2016] [Accepted: 07/21/2016] [Indexed: 12/17/2022]
Abstract
PURPOSE Radiation-induced pulmonary fibrosis (RIPF) is a late toxicity of therapeutic radiation. Signaling of the mammalian target of rapamycin drives several processes implicated in RIPF, including inflammatory cytokine production, fibroblast proliferation, and epithelial senescence. We sought to determine if mammalian target of rapamycin inhibition with rapamycin would mitigate RIPF. METHODS AND MATERIALS C57BL/6NCr mice received a diet formulated with rapamycin (14 mg/kg food) or a control diet 2 days before and continuing for 16 weeks after exposure to 5 daily fractions of 6 Gy of thoracic irradiation. Fibrosis was assessed with Masson trichrome staining and hydroxyproline assay. Cytokine expression was evaluated by quantitative real-time polymerase chain reaction. Senescence was assessed by staining for β-galactosidase activity. RESULTS Administration of rapamycin extended the median survival of irradiated mice compared with the control diet from 116 days to 156 days (P=.006, log-rank test). Treatment with rapamycin reduced hydroxyproline content compared with the control diet (irradiation plus vehicle, 45.9 ± 11.8 μg per lung; irradiation plus rapamycin, 21.4 ± 6.0 μg per lung; P=.001) and reduced visible fibrotic foci. Rapamycin treatment attenuated interleukin 1β and transforming growth factor β induction in irradiated lungs compared with the control diet. Type II pneumocyte senescence after irradiation was reduced with rapamycin treatment at 16 weeks (3-fold reduction at 16 weeks, P<.001). CONCLUSIONS Rapamycin protected against RIPF in a murine model. Rapamycin treatment reduced inflammatory cytokine expression, extracellular matrix production, and senescence in type II pneumocytes.
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Affiliation(s)
- Eun Joo Chung
- Radiation Oncology Branch, Center for Cancer Research, National Institutes of Health, Bethesda, Maryland
| | - Anastasia Sowers
- Radiation Biology Branch, Center for Cancer Research, National Institutes of Health, Bethesda, Maryland
| | - Angela Thetford
- Radiation Biology Branch, Center for Cancer Research, National Institutes of Health, Bethesda, Maryland
| | - Grace McKay-Corkum
- Radiation Oncology Branch, Center for Cancer Research, National Institutes of Health, Bethesda, Maryland
| | - Su I Chung
- Radiation Oncology Branch, Center for Cancer Research, National Institutes of Health, Bethesda, Maryland
| | - James B Mitchell
- Radiation Biology Branch, Center for Cancer Research, National Institutes of Health, Bethesda, Maryland
| | - Deborah E Citrin
- Radiation Oncology Branch, Center for Cancer Research, National Institutes of Health, Bethesda, Maryland.
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32
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Wang Y, Boerma M, Zhou D. Ionizing Radiation-Induced Endothelial Cell Senescence and Cardiovascular Diseases. Radiat Res 2016; 186:153-61. [PMID: 27387862 DOI: 10.1667/rr14445.1] [Citation(s) in RCA: 139] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Exposure to ionizing radiation induces not only apoptosis but also senescence. While the role of endothelial cell apoptosis in mediating radiation-induced acute tissue injury has been extensively studied, little is known about the role of endothelial cell senescence in the pathogenesis of radiation-induced late effects. Senescent endothelial cells exhibit decreased production of nitric oxide and expression of thrombomodulin, increased expression of adhesion molecules, elevated production of reactive oxygen species and inflammatory cytokines and an inability to proliferate and form capillary-like structures in vitro. These findings suggest that endothelial cell senescence can lead to endothelial dysfunction by dysregulation of vasodilation and hemostasis, induction of oxidative stress and inflammation and inhibition of angiogenesis, which can potentially contribute to radiation-induced late effects such as cardiovascular diseases (CVDs). In this article, we discuss the mechanisms by which radiation induces endothelial cell senescence, the roles of endothelial cell senescence in radiation-induced CVDs and potential strategies to prevent, mitigate and treat radiation-induced CVDs by targeting senescent endothelial cells.
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Affiliation(s)
- Yingying Wang
- Division of Radiation Health Department of Pharmaceutical Sciences, University of Arkansas Medical Sciences, Little Rock, Arkansas 72205
| | - Marjan Boerma
- Division of Radiation Health Department of Pharmaceutical Sciences, University of Arkansas Medical Sciences, Little Rock, Arkansas 72205
| | - Daohong Zhou
- Division of Radiation Health Department of Pharmaceutical Sciences, University of Arkansas Medical Sciences, Little Rock, Arkansas 72205
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33
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Satyamitra MM, DiCarlo AL, Taliaferro L. Understanding the Pathophysiology and Challenges of Development of Medical Countermeasures for Radiation-Induced Vascular/Endothelial Cell Injuries: Report of a NIAID Workshop, August 20, 2015. Radiat Res 2016; 186:99-111. [PMID: 27387859 DOI: 10.1667/rr14436.1] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
After the events of September 11, 2001, a decade of research on the development of medical countermeasures (MCMs) to treat victims of a radiological incident has yielded two FDA-approved agents to mitigate acute radiation syndrome. These licensed agents specifically target the mitigation of radiation-induced neutropenia and infection potential, while the ramifications of the exposure event in a public health emergency incident could include the entire body, causing additional acute and/or delayed organ/tissue injuries. Anecdotal data as well as recent findings from both radiation accident survivors and animal experiments implicate radiation-induced injury or dysfunction of the vascular endothelium leading to tissue and organ injuries. There are significant gaps in our understanding of the disease processes and progression, as well as the optimum approaches to develop medical countermeasures to mitigate radiation vascular injury. To address this issue, the Radiation and Nuclear Countermeasures Program of the National Institute of Allergy and Infectious Diseases (NIAID) organized a one-day workshop to examine the current state of the science in radiation-induced vascular injuries and organ dysfunction, the natural history of the pathophysiology and the product development maturity of potential medical countermeasures to treat these injuries. Meeting presentations were followed by a NIAID-led open discussion among academic investigators, industry researchers and government agency representatives. This article provides a summary of these presentations and subsequent discussion from the workshop.
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Affiliation(s)
- Merriline M Satyamitra
- Division of Allergy Immunology and Transplantation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland 20852
| | - Andrea L DiCarlo
- Division of Allergy Immunology and Transplantation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland 20852
| | - Lanyn Taliaferro
- Division of Allergy Immunology and Transplantation, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, Maryland 20852
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Pal S, Yadav P, Sainis KB, Shankar BS. TNF-α and IGF-1 differentially modulate ionizing radiation responses of lung cancer cell lines. Cytokine 2016; 101:89-98. [PMID: 27344406 DOI: 10.1016/j.cyto.2016.06.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 06/08/2016] [Accepted: 06/10/2016] [Indexed: 11/16/2022]
Abstract
The mechanism by which tumor microenvironment derived cytokine network modulates therapy response is of great concern in lung cancer but is not completely understood. In this study, we evaluated the effects of tumor necrosis factor α (TNF-α) and insulin-like growth factor 1 (IGF-1) on response of lung cancer cell lines to ionizing radiation (IR). While TNF-α increased radio sensitivity and inhibited cell migration, treatment with IGF-1 promoted cell growth and increased migration. These effects of TNF- α were mediated by increased immediate activation of stress-activated protein kinases (SAPK)/jun amino-terminal kinases (JNK) and p38. IR induced DNA damage was increased by TNF- α and not altered by IGF-1. However, in IGF-1 treated cells, there was decreased γ- H2AX along with an increase in mitotic index, resulting in abnormal chromosomal segregation in the cells. Bio informatics analysis of 982 lung cancer patients revealed that higher expression of TNF- α was associated with low risk of cancer progression while overexpression of IGF-1 was correlated with high risk. Collectively, these results reveal that the cytokines in the tumor microenvironment differentially modulate radiation therapy through a variety of signaling mechanisms.
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Affiliation(s)
- Shyama Pal
- Immunology Section, Radiation Biology & Health Sciences Division, Bio-Science Group, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Poonam Yadav
- Immunology Section, Radiation Biology & Health Sciences Division, Bio-Science Group, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - K B Sainis
- Immunology Section, Radiation Biology & Health Sciences Division, Bio-Science Group, Bhabha Atomic Research Centre, Mumbai 400 085, India
| | - Bhavani S Shankar
- Immunology Section, Radiation Biology & Health Sciences Division, Bio-Science Group, Bhabha Atomic Research Centre, Mumbai 400 085, India.
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Khor ES, Noor SM, Wong PF. Expression of zTOR-associated microRNAs in zebrafish embryo treated with rapamycin. Life Sci 2016; 150:67-75. [PMID: 26916825 DOI: 10.1016/j.lfs.2016.02.076] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Revised: 02/17/2016] [Accepted: 02/21/2016] [Indexed: 01/24/2023]
Abstract
AIMS MicroRNAs (miRNAs) are vital in modulating lifespan and various biological processes including vascular function. The pivotal roles of mammalian target of rapamycin (mTOR) in regulating senescence and angiogenesis have been extensively described. However, the roles of its orthologue, zebrafish target of rapamycin (zTOR) in senescence and angiogenesis remain to be unravelled. In the present study, we aimed to investigate the role of zTOR and identify miRNAs associated with senescence and angiogenesis. MAIN METHODS Zebrafish embryos were treated with rapamycin and the inhibition of zTOR and its downstream proteins were validated by immunoblotting. Following the treatment, melanocyte density was quantitated, and senescence and angiogenic responses were determined by senescence-associated beta-galactosidase (SA-β-gal) and endogenous alkaline phosphatase (ALP) staining, respectively. Relative expression of microRNAs were determined by quantitative RT-PCR. KEY FINDINGS Rapamycin (400 nM) suppressed zTOR pathway by down-regulating the phosphorylation of zTOR-associated proteins such as P70S6K and S6K at both 4h post-fertilisation (hpf) and 8hpf while 4E-BP1 was only down-regulated at 8hpf when compared to their respective vehicle controls. Treatment with rapamycin also resulted in significant suppression of melanocyte development and senescence-associated beta-galactosidase (SA-β-gal) activity, and perturbed the development of intersegmental vessels (ISVs) of zebrafish embryos. In addition, the expressions of dre-miR-9-5p and -3p, dre-miR-25-3p and dre-miR-124-3p were significantly up-regulated in embryos treated with rapamycin from 4hpf. SIGNIFICANCE Our findings suggest the involvement of zTOR in embryonic senescence and angiogenesis which could be potentially mediated by selected miRNAs.
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Affiliation(s)
- Eng-Soon Khor
- Department of Pharmacology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Suzita Mohd Noor
- Department of Biomedical Science, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Pooi-Fong Wong
- Department of Pharmacology, Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur, Malaysia.
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3D tumor tissue analogs and their orthotopic implants for understanding tumor-targeting of microenvironment-responsive nanosized chemotherapy and radiation. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2015; 11:2013-23. [PMID: 26282381 DOI: 10.1016/j.nano.2015.07.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Revised: 07/16/2015] [Accepted: 07/22/2015] [Indexed: 12/19/2022]
Abstract
UNLABELLED An appropriate representation of the tumor microenvironment in tumor models can have a pronounced impact on directing combinatorial treatment strategies and cancer nanotherapeutics. The present study develops a novel 3D co-culture spheroid model (3D TNBC) incorporating tumor cells, endothelial cells and fibroblasts as color-coded murine tumor tissue analogs (TTA) to better represent the tumor milieu of triple negative breast cancer in vitro. Implantation of TTA orthotopically in nude mice, resulted in enhanced growth and aggressive metastasis to ectopic sites. Subsequently, the utility of the model is demonstrated for preferential targeting of irradiated tumor endothelial cells via radiation-induced stromal enrichment of galectin-1 using anginex conjugated nanoparticles (nanobins) carrying arsenic trioxide and cisplatin. Demonstration of a multimodal nanotherapeutic system and inclusion of the biological response to radiation using an in vitro/in vivo tumor model incorporating characteristics of tumor microenvironment presents an advance in preclinical evaluation of existing and novel cancer nanotherapies. FROM THE CLINICAL EDITOR Existing in-vivo tumor models are established by implanting tumor cells into nude mice. Here, the authors described their approach 3D spheres containing tumor cells, enodothelial cells and fibroblasts. This would mimic tumor micro-environment more realistically. This interesting 3D model should reflect more accurately tumor response to various drugs and would enable the design of new treatment modalities.
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Abstract
Endothelial cells line blood vessels and modulate vascular tone, thrombosis, inflammatory responses and new vessel formation. They are implicated in many disease processes including atherosclerosis and cancer. IGFs play a significant role in the physiology of endothelial cells by promoting migration, tube formation and production of the vasodilator nitric oxide. These actions are mediated by the IGF1 and IGF2/mannose 6-phosphate receptors and are modulated by a family of high-affinity IGF binding proteins. IGFs also increase the number and function of endothelial progenitor cells, which may contribute to protection from atherosclerosis. IGFs promote angiogenesis, and dysregulation of the IGF system may contribute to this process in cancer and eye diseases including retinopathy of prematurity and diabetic retinopathy. In some situations, IGF deficiency appears to contribute to endothelial dysfunction, whereas IGF may be deleterious in others. These differences may be due to tissue-specific endothelial cell phenotypes or IGFs having distinct roles in different phases of vascular disease. Further studies are therefore required to delineate the therapeutic potential of IGF system modulation in pathogenic processes.
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Affiliation(s)
- Leon A Bach
- Department of Medicine (Alfred)Monash University, Prahran 3181, AustraliaDepartment of Endocrinology and DiabetesAlfred Hospital, Commercial Road, Melbourne 3004, Australia Department of Medicine (Alfred)Monash University, Prahran 3181, AustraliaDepartment of Endocrinology and DiabetesAlfred Hospital, Commercial Road, Melbourne 3004, Australia
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Azimzadeh O, Sievert W, Sarioglu H, Merl-Pham J, Yentrapalli R, Bakshi MV, Janik D, Ueffing M, Atkinson MJ, Multhoff G, Tapio S. Integrative proteomics and targeted transcriptomics analyses in cardiac endothelial cells unravel mechanisms of long-term radiation-induced vascular dysfunction. J Proteome Res 2015; 14:1203-19. [PMID: 25590149 DOI: 10.1021/pr501141b] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Epidemiological data from radiotherapy patients show the damaging effect of ionizing radiation on heart and vasculature. The endothelium is the main target of radiation damage and contributes essentially to the development of cardiac injury. However, the molecular mechanisms behind the radiation-induced endothelial dysfunction are not fully understood. In the present study, 10-week-old C57Bl/6 mice received local X-ray heart doses of 8 or 16 Gy and were sacrificed after 16 weeks; the controls were sham-irradiated. The cardiac microvascular endothelial cells were isolated from the heart tissue using streptavidin-CD31-coated microbeads. The cells were lysed and proteins were labeled with duplex isotope-coded protein label methodology for quantification. All samples were analyzed by LC-ESI-MS/MS and Proteome Discoverer software. The proteomics data were further studied by bioinformatics tools and validated by targeted transcriptomics, immunoblotting, immunohistochemistry, and serum profiling. Radiation-induced endothelial dysfunction was characterized by impaired energy metabolism and perturbation of the insulin/IGF-PI3K-Akt signaling pathway. The data also strongly suggested premature endothelial senescence, increased oxidative stress, decreased NO availability, and enhanced inflammation as main causes of radiation-induced long-term vascular dysfunction. Detailed data on molecular mechanisms of radiation-induced vascular injury as compiled here are essential in developing radiotherapy strategies that minimize cardiovascular complications.
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Affiliation(s)
- Omid Azimzadeh
- Helmholtz Zentrum München - German Research Centre for Environmental Health, Institute of Radiation Biology , Ingolstaedter Landstrasse 1, D-85764 Neuherberg, Germany
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39
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Rosen EM, Day R, Singh VK. New approaches to radiation protection. Front Oncol 2015; 4:381. [PMID: 25653923 PMCID: PMC4299410 DOI: 10.3389/fonc.2014.00381] [Citation(s) in RCA: 68] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2014] [Accepted: 12/19/2014] [Indexed: 12/16/2022] Open
Abstract
Radioprotectors are compounds that protect against radiation injury when given prior to radiation exposure. Mitigators can protect against radiation injury when given after exposure but before symptoms appear. Radioprotectors and mitigators can potentially improve the outcomes of radiotherapy for cancer treatment by allowing higher doses of radiation and/or reduced damage to normal tissues. Such compounds can also potentially counteract the effects of accidental exposure to radiation or deliberate exposure (e.g., nuclear reactor meltdown, dirty bomb, or nuclear bomb explosion); hence they are called radiation countermeasures. Here, we will review the general principles of radiation injury and protection and describe selected examples of radioprotectors/mitigators ranging from small-molecules to proteins to cell-based treatments. We will emphasize agents that are in more advanced stages of development.
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Affiliation(s)
- Eliot M Rosen
- Departments of Oncology, Biochemistry and Molecular & Cellular Biology, and Radiation Medicine, Lombardi Comprehensive Cancer Center, Georgetown University School of Medicine , Washington, DC , USA
| | - Regina Day
- Department of Pharmacology, F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences , Bethesda, MD , USA
| | - Vijay K Singh
- Department of Radiation Biology, F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences , Bethesda, MD , USA ; Radiation Countermeasures Program, Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences , Bethesda, MD , USA
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40
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Day RM, Snow AL, Panganiban RAM. Radiation-induced accelerated senescence: a fate worse than death? Cell Cycle 2014; 13:2011-2. [PMID: 24922064 PMCID: PMC4111686 DOI: 10.4161/cc.29457] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Affiliation(s)
- Regina M Day
- Department of Pharmacology; Uniformed Services University of the Health Sciences; Bethesda, MD USA
| | - Andrew L Snow
- Department of Pharmacology; Uniformed Services University of the Health Sciences; Bethesda, MD USA
| | - Ronald Allan M Panganiban
- Molecular Integrative Physiological Sciences; Department of Environmental Health; Harvard University School of Public Health; Boston, MA USA
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Abstract
Here we discuss the latest progress in development of some kinase inhibitors such as inhibitors of c-MET, LIM and Bcr-Abl kinases. Importantly, many oncogenic kinases signal via the mTOR pathway, suggesting a common target for drug combinations.
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Leontieva OV, Blagosklonny MV. M(o)TOR of pseudo-hypoxic state in aging: rapamycin to the rescue. Cell Cycle 2014; 13:509-15. [PMID: 24496328 DOI: 10.4161/cc.27973] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
A groundbreaking publication by Sinclair and coworkers has illuminated the pseudo-hypoxic state in aging and its reversibility. Remarkably, these data also fit the mTOR-centered model of aging. Here we discuss that the mTOR pathway can cause cellular pseudo-hypoxic state, manifested by HIF-1 expression and lactate production under normoxia. We found that rapamycin decreased HIF-1 and lactate levels in proliferating and senescent cells in vitro. This reduction was independent from mitochondrial respiration: rapamycin decreased lactate production in normoxia, hypoxia, and in the presence of the OXPHOS inhibitor oligomycin. We suggest that pseudo-hypoxic state is not necessarily caused by mitochondrial dysfunction, but instead mitochondrial dysfunction may be secondary to mTOR-driven hyperfunctions. Clinical applications of rapamycin for reversing pseudo-hypoxic state and lactate acidosis are discussed.
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Affiliation(s)
- Olga V Leontieva
- Cell Stress Biology; Roswell Park Cancer Institute; Buffalo, NY USA
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