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Meng C, Wang X, Fan L, Fan Y, Yan Z, Wang Y, Li Y, Zhang J, Lv S. A new perspective in the prevention and treatment of antitumor therapy-related cardiotoxicity: Intestinal microecology. Biomed Pharmacother 2024; 170:115588. [PMID: 38039758 DOI: 10.1016/j.biopha.2023.115588] [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: 08/02/2023] [Revised: 09/17/2023] [Accepted: 09/25/2023] [Indexed: 12/03/2023] Open
Abstract
The continuous development of antitumor therapy has significantly reduced the mortality of patients with malignancies. However, the antitumor-related cardiotoxicity has become the leading cause of long-term mortality in patients with malignancies. Besides, the pathogenesis of antitumor-related cardiotoxicity is still unclear, and practical means of prevention and treatment are lacking in clinical practice. Therefore, the major challenge is how to combat the cardiotoxicity of antitumor therapy effectively. More and more studies have shown that antitumor therapy kills tumor cells while causing damage to sensitive tissues such as the intestinal mucosa, leading to the increased permeability of the intestine and the dysbiosis of intestinal microecology. In addition, the dysbiosis of intestinal microecology contributes to the development and progression of cardiovascular diseases through multiple pathways. Thus, the dysbiosis of intestinal microecology may be a potential mechanism and target for antitumor-related cardiotoxicity. We summarized the characteristics of intestinal microecology disorders induced by antitumor therapy and the association between intestinal microecological dysbiosis and CVD. And on this basis, we hypothesized the potential mechanisms of intestinal microecology mediating the occurrence of antitumor-related cardiotoxicity. Then we reviewed the previous studies targeting intestinal microecology against antitumor-associated cardiotoxicity, aiming to provide a reference for future studies on the occurrence and prevention of antitumor-related cardiotoxicity by intestinal microecology.
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Affiliation(s)
- Chenchen Meng
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine (National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion), Tianjin, China
| | - Xiaoming Wang
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine (National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion), Tianjin, China
| | - Lu Fan
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine (National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion), Tianjin, China
| | - Yajie Fan
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine (National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion), Tianjin, China
| | - Zhipeng Yan
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine (National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion), Tianjin, China
| | - Yunjiao Wang
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine (National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion), Tianjin, China
| | - Yanyang Li
- Department of integrated Chinese and Western medicine, Tianjin Medical University Cancer Institute and Hospital, Tianjin, China.
| | - Junping Zhang
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine (National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion), Tianjin, China.
| | - Shichao Lv
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine (National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion), Tianjin, China.
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Wu L, Ai Y, Xie R, Xiong J, Wang Y, Liang Q. Organoids/organs-on-a-chip: new frontiers of intestinal pathophysiological models. LAB ON A CHIP 2023; 23:1192-1212. [PMID: 36644984 DOI: 10.1039/d2lc00804a] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Organoids/organs-on-a-chip open up new frontiers for basic and clinical research of intestinal diseases. Species-specific differences hinder research on animal models, while organoids are emerging as powerful tools due to self-organization from stem cells and the reproduction of the functional properties in vivo. Organs-on-a-chip is also accelerating the process of faithfully mimicking the intestinal microenvironment. And by combining organoids and organ-on-a-chip technologies, they further are expected to serve as innovative preclinical tools and could outperform traditional cell culture models or animal models in the future. Above all, organoids/organs-on-a-chip with other strategies like genome editing, 3D printing, and organoid biobanks contribute to modeling intestinal homeostasis and disease. Here, the current challenges and future trends in intestinal pathophysiological models will be summarized.
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Affiliation(s)
- Lei Wu
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Laboratory of Flexible Electronics Technology, Center for Synthetic and Systems Biology, Tsinghua University, Beijing 100084, P.R. China.
| | - Yongjian Ai
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Laboratory of Flexible Electronics Technology, Center for Synthetic and Systems Biology, Tsinghua University, Beijing 100084, P.R. China.
| | - Ruoxiao Xie
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Laboratory of Flexible Electronics Technology, Center for Synthetic and Systems Biology, Tsinghua University, Beijing 100084, P.R. China.
| | - Jialiang Xiong
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Laboratory of Flexible Electronics Technology, Center for Synthetic and Systems Biology, Tsinghua University, Beijing 100084, P.R. China.
| | - Yu Wang
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Laboratory of Flexible Electronics Technology, Center for Synthetic and Systems Biology, Tsinghua University, Beijing 100084, P.R. China.
| | - Qionglin Liang
- MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Department of Chemistry, Laboratory of Flexible Electronics Technology, Center for Synthetic and Systems Biology, Tsinghua University, Beijing 100084, P.R. China.
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Fan J, Lin B, Fan M, Niu T, Gao F, Tan B, Du X. Research progress on the mechanism of radiation enteritis. Front Oncol 2022; 12:888962. [PMID: 36132154 PMCID: PMC9483210 DOI: 10.3389/fonc.2022.888962] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 08/10/2022] [Indexed: 12/12/2022] Open
Abstract
Radiation enteritis (Re) is one of the most common complications of radiation therapy for abdominal tumors. The efficacy of cancer treatment by radiation is often limited by the side effects of Re. Re can be acute or chronic. Treatment of acute Re is essentially symptomatic. However, chronic Re usually requires surgical procedures. The underlying mechanisms of Re are complex and have not yet been elucidated. The purpose of this review is to provide an overview of the pathogenesis of Re. We reviewed the role of intestinal epithelial cells, intestinal stem cells (ISCs), vascular endothelial cells (ECs), intestinal microflora, and other mediators of Re, noting that a better understanding of the pathogenesis of Re may lead to better treatment modalities.
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Affiliation(s)
- Jinjia Fan
- Departmant of Oncology, National Health Commission Key Laboratory of Nuclear Technology Medical Transformation (Mianyang Central Hospital), Mianyang Central Hospital, School of Medicine, University of Electronic Science and Technology, Mianyang, China
- Department of Oncology, Affiliated Hospital of North Sichuan Medical College, Nan Chong, China
| | - Binwei Lin
- Departmant of Oncology, National Health Commission Key Laboratory of Nuclear Technology Medical Transformation (Mianyang Central Hospital), Mianyang Central Hospital, School of Medicine, University of Electronic Science and Technology, Mianyang, China
| | - Mi Fan
- Departmant of Oncology, National Health Commission Key Laboratory of Nuclear Technology Medical Transformation (Mianyang Central Hospital), Mianyang Central Hospital, School of Medicine, University of Electronic Science and Technology, Mianyang, China
- Department of Oncology, Affiliated Hospital of North Sichuan Medical College, Nan Chong, China
| | - Tintin Niu
- Departmant of Oncology, National Health Commission Key Laboratory of Nuclear Technology Medical Transformation (Mianyang Central Hospital), Mianyang Central Hospital, School of Medicine, University of Electronic Science and Technology, Mianyang, China
- Department of Oncology, Affiliated Hospital of North Sichuan Medical College, Nan Chong, China
| | - Feng Gao
- Departmant of Oncology, National Health Commission Key Laboratory of Nuclear Technology Medical Transformation (Mianyang Central Hospital), Mianyang Central Hospital, School of Medicine, University of Electronic Science and Technology, Mianyang, China
| | - Bangxian Tan
- Department of Oncology, Affiliated Hospital of North Sichuan Medical College, Nan Chong, China
| | - Xiaobo Du
- Departmant of Oncology, National Health Commission Key Laboratory of Nuclear Technology Medical Transformation (Mianyang Central Hospital), Mianyang Central Hospital, School of Medicine, University of Electronic Science and Technology, Mianyang, China
- Department of Oncology, Affiliated Hospital of North Sichuan Medical College, Nan Chong, China
- *Correspondence: Xiaobo Du,
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Differential Radiosensitizing Effect of 50 nm Gold Nanoparticles in Two Cancer Cell Lines. BIOLOGY 2022; 11:biology11081193. [PMID: 36009820 PMCID: PMC9404963 DOI: 10.3390/biology11081193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 07/19/2022] [Accepted: 08/08/2022] [Indexed: 11/17/2022]
Abstract
Simple Summary Nanoparticle treatment on tumor cells is proposed for its potential radiosensitizing properties, increasing the radiation effect on tumor cells and reducing the adverse effects on healthy tissues. The present study evaluates, on two cell lines derived from colon and breast adenocarcinomas, the impact of irradiation in the presence of specifically targeted gold nanoparticles. Cells were irradiated in the absence and in the presence of non-functionalized or specifically functionalized gold nanoparticles. The results pointed out that actively targeting gold nanoparticles has a clear radiosensitizing effect in both cell lines. Abstract Radiation therapy is widely used as an anti-neoplastic treatment despite the adverse effects it can cause in non-tumoral tissues. Radiosensitizing agents, which can increase the effect of radiation in tumor cells, such as gold nanoparticles (GNPs), have been described. To evaluate the radiosensitizing effect of 50 nm GNPs, we carried out a series of studies in two neoplastic cell lines, Caco2 (colon adenocarcinoma) and SKBR3 (breast adenocarcinoma), qualitatively evaluating the internalization of the particles, determining with immunofluorescence the number of γ-H2AX foci after irradiation with ionizing radiation (3 Gy) and evaluating the viability rate of both cell lines after treatment by means of an MTT assay. Nanoparticle internalization varied between cell lines, though they both showed higher internalization degrees for functionalized GNPs. The γ-H2AX foci counts for the different times analyzed showed remarkable differences between cell lines, although they were always significantly higher for functionalized GNPs in both lines. Regarding cell viability, in most cases a statistically significant decreasing tendency was observed when treated with GNPs, especially those that were functionalized. Our results led us to conclude that, while 50 nm GNPs induce a clear radiosensitizing effect, it is highly difficult to describe the magnitude of this effect as universal because of the heterogeneity found between cell lines.
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Li HL, Wei YY, Li XH, Zhang SS, Zhang RT, Li JH, Ma BW, Shao SB, Lv ZW, Ruan H, Zhou HG, Yang C. Diosmetin has therapeutic efficacy in colitis regulating gut microbiota, inflammation, and oxidative stress via the circ-Sirt1/Sirt1 axis. Acta Pharmacol Sin 2022; 43:919-932. [PMID: 34262136 PMCID: PMC8976001 DOI: 10.1038/s41401-021-00726-0] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Accepted: 06/22/2021] [Indexed: 02/06/2023] Open
Abstract
Diosmetin (3',5,7 -trihydroxy-4'-methoxy flavone) is a natural flavonoid compound in the citrus species, it exhibits a variety of pharmacological activities, but little is known of its effects on colitis. In this study we evaluated the therapeutic effects of diosmetin on mouse models of chronic and acute colitis. Chronic colitis was induced in mice by drinking water containing 3% dextran sulfate sodium (DSS) from D0 to D8, followed by administration of diosmetin (25, 50 mg · kg-1 · d-1) for another 8 days. Acute colitis was induced by drinking water containing 5% DSS from D0 to D7, the mice concomitantly received diosmetin (25, 50 mg · kg-1 · d-1) from D1 to D7. During the experiments, body weight and disease activity index (DAI) were assessed daily. After the mice were sacrificed, colon tissue and feces samples were collected, and colon length was measured. We showed that in both models, diosmetin administration significantly decreased DAI score and ameliorated microscopic colon tissue damage; increased the expression of tight junction proteins (occludin, claudin-1, and zonula occludens-1), and reduced the secretion of proinflammatory cytokines IL-1β, IL-6, TNF-α, and Cox-2 in colon tissue. We found that diosmetin administration remarkably inhibited colon oxidative damage by adjusting the levels of intracellular and mitochondrial reactive oxygen species, GSH-Px, SOD, MDA and GSH in colon tissue. The protection of diosmetin against intestinal epithelial barrier damage and oxidative stress were also observed in LPS-treated Caco-2 and IEC-6 cells in vitro. Furthermore, we demonstrated that diosmetin markedly increased the expression of Nrf2 and HO-1 and reduced the ratio of acetylated NF-κB and NF-κB by activating the circ-Sirt1/Sirt1 axis, which inhibited oxidative stress and inflammation in vivo and in vitro. Diosmetin reversed the effects of si-circSirt1 and si-Sirt1 in LPS-treated Caco-2 and IEC-6 cells. When the gut microbiota was analyzed in the mouse model of colitis, we found that diosmetin administration modulated the abundance of Bacteroidetes, Actinobacteria, Cyanobacteria and Firmicutes, which were crucial for inflammatory bowel disease. Our results have linked colitis to the circ-Sirt1/Sirt1 signaling pathway, which is activated by diosmetin. The results imply that diosmetin may be a novel candidate to alleviate DSS-induced colitis and can be a lead compound for future optimization and modification.
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Affiliation(s)
- Hai-long Li
- grid.216938.70000 0000 9878 7032The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350 China ,grid.488175.7High-throughput Molecular Drug Screening Centre, Tianjin International Joint Academy of Biomedicine, Tianjin, 300350 China
| | - Yi-ying Wei
- grid.216938.70000 0000 9878 7032The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350 China ,grid.488175.7High-throughput Molecular Drug Screening Centre, Tianjin International Joint Academy of Biomedicine, Tianjin, 300350 China
| | - Xiao-he Li
- grid.216938.70000 0000 9878 7032The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350 China ,grid.488175.7High-throughput Molecular Drug Screening Centre, Tianjin International Joint Academy of Biomedicine, Tianjin, 300350 China
| | - Shan-shan Zhang
- grid.216938.70000 0000 9878 7032The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350 China ,grid.488175.7High-throughput Molecular Drug Screening Centre, Tianjin International Joint Academy of Biomedicine, Tianjin, 300350 China
| | - Ruo-tong Zhang
- grid.216938.70000 0000 9878 7032The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350 China ,grid.488175.7High-throughput Molecular Drug Screening Centre, Tianjin International Joint Academy of Biomedicine, Tianjin, 300350 China
| | - Jin-he Li
- grid.216938.70000 0000 9878 7032The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350 China ,grid.488175.7High-throughput Molecular Drug Screening Centre, Tianjin International Joint Academy of Biomedicine, Tianjin, 300350 China
| | - Bo-wei Ma
- grid.216938.70000 0000 9878 7032The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350 China ,grid.488175.7High-throughput Molecular Drug Screening Centre, Tianjin International Joint Academy of Biomedicine, Tianjin, 300350 China
| | - Shuai-bo Shao
- grid.216938.70000 0000 9878 7032The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350 China ,grid.488175.7High-throughput Molecular Drug Screening Centre, Tianjin International Joint Academy of Biomedicine, Tianjin, 300350 China
| | - Zi-wei Lv
- grid.216938.70000 0000 9878 7032The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350 China ,grid.488175.7High-throughput Molecular Drug Screening Centre, Tianjin International Joint Academy of Biomedicine, Tianjin, 300350 China
| | - Hao Ruan
- grid.216938.70000 0000 9878 7032The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350 China ,grid.488175.7High-throughput Molecular Drug Screening Centre, Tianjin International Joint Academy of Biomedicine, Tianjin, 300350 China
| | - Hong-gang Zhou
- grid.216938.70000 0000 9878 7032The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350 China ,grid.488175.7High-throughput Molecular Drug Screening Centre, Tianjin International Joint Academy of Biomedicine, Tianjin, 300350 China
| | - Cheng Yang
- grid.216938.70000 0000 9878 7032The State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy and Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350 China ,grid.488175.7High-throughput Molecular Drug Screening Centre, Tianjin International Joint Academy of Biomedicine, Tianjin, 300350 China
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Ma F, Sui S, Yang Z, Ye T, Yang L, Han P, Gan H, Wu Z, Gu R, Zhu X, Li F, Meng Z, Jiang Z, Dou G. Evaluation of Novel Tranexamic Acid/Montmorillonite Intercalation Composite, as a New Type of Hemostatic Material. BIOMED RESEARCH INTERNATIONAL 2022; 2022:3963681. [PMID: 35265711 PMCID: PMC8901336 DOI: 10.1155/2022/3963681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 01/27/2022] [Indexed: 11/17/2022]
Abstract
Radiation enteritis-clinically manifested as diarrhea, intestinal bleeding, and so on-is frequently caused when the body is exposed to radiation or radiotherapy because the intestine is radiation-sensitive as an abdominal organ. Therefore, strategies to modulate intestinal hemostasis had inspired an important research trend in the process of preventing and treating radiation enteritis. Based on the structural characteristics of montmorillonite (MMT) and the hemostatic drug tranexamic acid (TXA) which was used clinically to treat enteritis, the tranexamic acid-montmorillonite composite material (TXA-MMT) was prepared through intercalation composite technology. According to the analysis of FTIR, XRD, TG-DTG, SEM, and XRF, the prepared TXA-MMT was verified that tranexamic acid could intercalate into layers of montmorillonite. To evaluate the biocompatibility, two experiments were conducted by in vitro hemolysis and in vitro cytotoxicity experiments and results showed that TXA-MMT exhibited good visible biocompatibility. Activated partial thromboplastin time, prothrombin time, and in vitro clotting time were adopted to determine the hemostatic effect of TXA-MMT. Compared with other groups, TXA-MMT revealed a significant decrease in clotting time variations, APTT, and PT. In addition, to investigate the preventive effect of TXA-MMT by the intervention of radiation enteritis mice, inflammatory factors IL-1β, IL-6, and TNF-α and the content of endotoxin in the serum of mice were detected. It demonstrated that TXA-MMT reduced the levels of these factors. Besides, the expression and the pathological changes of the small intestine tissue of mice were relieved. Our findings suggests that TXA-MMT as a promising intercalation composite has a great potential for application in the field of intestinal hemostasis.
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Affiliation(s)
- Fei Ma
- State Key Laboratory of Drug Metabolism and Pharmacokinetics, Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Shujing Sui
- Department of Gastroenterology, Taian City Central Hospital, Taian 271000, China
| | - Zhiyuan Yang
- State Key Laboratory of Drug Metabolism and Pharmacokinetics, Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Tong Ye
- State Key Laboratory of Drug Metabolism and Pharmacokinetics, Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Lei Yang
- State Key Laboratory of Drug Metabolism and Pharmacokinetics, Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Peng Han
- State Key Laboratory of Drug Metabolism and Pharmacokinetics, Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Hui Gan
- State Key Laboratory of Drug Metabolism and Pharmacokinetics, Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Zhuona Wu
- State Key Laboratory of Drug Metabolism and Pharmacokinetics, Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Ruolan Gu
- State Key Laboratory of Drug Metabolism and Pharmacokinetics, Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Xiaoxia Zhu
- State Key Laboratory of Drug Metabolism and Pharmacokinetics, Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Fei Li
- College of Life Science and Technology, Beijing University of Chemical Technology, Beijing 100089, China
- Clinical Laboratory Center, Taian City Central Hospital, Taian 271000, China
| | - Zhiyun Meng
- State Key Laboratory of Drug Metabolism and Pharmacokinetics, Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, China
| | - Zhiping Jiang
- Pharmacy Intravenous Admixture Services, Taian City Central Hospital, Taian 271000, China
| | - Guifang Dou
- State Key Laboratory of Drug Metabolism and Pharmacokinetics, Department of Pharmaceutical Sciences, Beijing Institute of Radiation Medicine, Beijing 100850, China
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Roots of the xerophyte Panicum turgidum host a cohort of ionizing-radiation-resistant biotechnologically-valuable bacteria. Saudi J Biol Sci 2022; 29:1260-1268. [PMID: 35197792 PMCID: PMC8847929 DOI: 10.1016/j.sjbs.2021.09.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 09/06/2021] [Accepted: 09/09/2021] [Indexed: 11/21/2022] Open
Abstract
Bacterial communities associated with roots of Panicum turgidum, exposed to arid conditions, were investigated with a combination of cultural and metataxonomic approaches. Traditional culture-based techniques were used and 32 isolates from the irradiated roots were identified as belonging to Actinobacteria, Bacteroidetes, Firmicutes and Proteobacteria phyla. Four actinobacterial strains were shown to be ionizing-radiation (IR)-resistant: Microbacterium sp. PT8 (4.8 kGy (kGy)), Micrococcus sp. PT11 (4.4 kGy), Kocuria rhizophila PT10 (2.9 kGy) and Promicromonospora panici PT9T (2.6 kGy), based on the D10 dose necessary for a 90% reduction in colony forming units (CFU). Concerning the investigation of microbial communities in situ, metataxonomic analyses of the diversity of IR-resistant microorganisms associated with irradiated roots revealed a marked dominance of Actinobacteria (46.6%) and Proteobacteria (31.5%) compared to Bacteroidetes (4.6%) and Firmicutes (3.2%). Gamma irradiation not only changed the structure of bacterial communities, but also affected their functional properties. Comparative analyses of metabolic profiles indicated the induction of several pathways related to adaptation to oxidative stress in irradiated roots, such as DNA repair, secondary metabolites synthesis, reactive oxygen species (ROS)-mitigating enzymes, etc. P. turgidum is emblematic of desert-adapted plants. Until now, there is no other work that has focused on the microbial profile of irradiated roots of this xerophyte.
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Prieto C, Evtoski Z, Pardo-Figuerez M, Hrakovsky J, Lagaron JM. Nanostructured Valsartan Microparticles with Enhanced Bioavailability Produced by High-Throughput Electrohydrodynamic Room-Temperature Atomization. Mol Pharm 2021; 18:2947-2958. [PMID: 34181413 PMCID: PMC8494385 DOI: 10.1021/acs.molpharmaceut.1c00098] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
![]()
The high-throughput drying and encapsulation
technique called electrospraying
assisted by pressurized gas (EAPG) was used for the first time to
produce nanostructured valsartan within microparticles of excipients.
Valsartan, a poorly absorbed and lipid-soluble drug, was selected
since it is considered a good model for BCS class II drugs. Two different
polymeric matrices were selected as excipients, i.e., hydroxypropyl
methylcellulose (HPMC) and lactose monohydrate, while Span 20 was
used as a surfactant. The produced 80% valsartan loading formulations
were characterized in terms of morphology, crystallinity, in vitro release, in vitro Caco-2 cells’
permeability, and in vivo pharmacokinetic study.
Spherical microparticles of ca. 4 μm were obtained
within which valsartan nanoparticles were seen to range from 150 to
650 nm. Wide-angle X-ray scattering and differential scanning calorimetry
confirmed that valsartan had a lower and/or more ill-defined crystallinity
than the commercial source, and photon correlation spectroscopy and
transmission electron microscopy proved that it was dispersed and
distributed in the form of nanoparticles of controlled size. In vitro dissolution tests showed that the HPMC formulation
with the lowest API particle size, i.e., 150 nm, dissolved 2.5-fold
faster than the commercial valsartan in the first 10 min. This formulation
also showed a 4-fold faster in vitro permeability
than the commercial valsartan and a 3-fold higher systemic exposure
than the commercial sample. The results proved the potential of the
EAPG processing technique for the production of safe-to-handle microparticles
containing high quantities of a highly dispersed and distributed nanonized
BCS class II model drug with enhanced bioavailability.
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Affiliation(s)
- Cristina Prieto
- Novel Materials and Nanotechnology Group, Institute of Agrochemistry and Food Technology (IATA), Spanish Council for Scientific Research (CSIC), Calle Catedrático Agustín Escardino Benlloch 7, 46980 Paterna, Valencia, Spain
| | - Zoran Evtoski
- Novel Materials and Nanotechnology Group, Institute of Agrochemistry and Food Technology (IATA), Spanish Council for Scientific Research (CSIC), Calle Catedrático Agustín Escardino Benlloch 7, 46980 Paterna, Valencia, Spain
| | - María Pardo-Figuerez
- Novel Materials and Nanotechnology Group, Institute of Agrochemistry and Food Technology (IATA), Spanish Council for Scientific Research (CSIC), Calle Catedrático Agustín Escardino Benlloch 7, 46980 Paterna, Valencia, Spain.,Bioinicia R&D Department, Bioinicia S.L., Calle Algepser 65 nave 3, 46980 Paterna, Valencia, Spain
| | - Julia Hrakovsky
- R&D Finished Dosage Forms, Zakłady Farmaceutyczne Polpharma SA, ul. Pelplińska 19, 83-200 Starogard Gdański, Poland
| | - Jose M Lagaron
- Novel Materials and Nanotechnology Group, Institute of Agrochemistry and Food Technology (IATA), Spanish Council for Scientific Research (CSIC), Calle Catedrático Agustín Escardino Benlloch 7, 46980 Paterna, Valencia, Spain
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Guardamagna I, Lonati L, Savio M, Stivala LA, Ottolenghi A, Baiocco G. An Integrated Analysis of the Response of Colorectal Adenocarcinoma Caco-2 Cells to X-Ray Exposure. Front Oncol 2021; 11:688919. [PMID: 34150657 PMCID: PMC8209426 DOI: 10.3389/fonc.2021.688919] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 05/11/2021] [Indexed: 11/17/2022] Open
Abstract
Colorectal cancer is among the three top cancer types for incidence and the second in terms of mortality, usually managed with surgery, chemotherapy and radiotherapy. In particular, radiotherapeutic concepts are crucial for the management of advanced rectal cancer, but patients’ survival remains poor, despite advances in treatment modalities. The use of well-characterized in vitro cell culture systems offers an important preclinical strategy to study mechanisms at the basis of cell response to therapeutic agents, including ionizing radiation, possibly leading to a better understanding of the in vivo response to the treatment. In this context, we present an integrated analysis of results obtained in an extensive measurement campaign of radiation effects on Caco-2 cells, derived from human colorectal adenocarcinoma. Cells were exposed to X-rays with doses up to 10 Gy from a radiotherapy accelerator. We measured a variety of endpoints at different post-irradiation times: clonogenic survival after ~ 2 weeks; cell cycle distribution, cell death, frequency of micronucleated cells and atypical mitoses, activation of matrix metalloproteases (MMPs) and of different proteins involved in DNA damage response and cell cycle regulation at earlier time points, up to 48 h post-exposure. Combined techniques of flow cytometry, immunofluorescence microscopy, gelatin zymography and western blotting were used. For selected endpoints, we also addressed the impact of the irradiation protocol, comparing results obtained when cells are plated before irradiation or first-irradiated and then re-plated. Caco-2 resistance to radiation, previously assessed up to 72 h post exposure in terms of cell viability, does not translate into a high clonogenic survival. Survival is not affected by the irradiation protocol, while endpoints measured on a shorter time frame are. Radiation mainly induces a G2-phase arrest, confirmed by associated molecular markers. The activation of death pathways is dose- and time-dependent, and correlates with a dose-dependent inhibition of MMPs. Genomic aberrations are also found to be dose-dependent. The phosphorylated forms of several proteins involved in cell cycle regulation increase following exposure; the key regulator FoxM1 appears to be downregulated, also leading to inhibition of MMP-2. A unified molecular model of the chain of events initiated by radiation is proposed to interpret all experimental results.
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Affiliation(s)
- Isabella Guardamagna
- Laboratory of Radiation Biophysics and Radiobiology, Department of Physics, University of Pavia, Pavia, Italy
| | - Leonardo Lonati
- Laboratory of Radiation Biophysics and Radiobiology, Department of Physics, University of Pavia, Pavia, Italy
| | - Monica Savio
- Immunology and General Pathology Unit, Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | - Lucia A Stivala
- Immunology and General Pathology Unit, Department of Molecular Medicine, University of Pavia, Pavia, Italy
| | - Andrea Ottolenghi
- Laboratory of Radiation Biophysics and Radiobiology, Department of Physics, University of Pavia, Pavia, Italy
| | - Giorgio Baiocco
- Laboratory of Radiation Biophysics and Radiobiology, Department of Physics, University of Pavia, Pavia, Italy
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10
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Guesmi S, Nouioui I, Pujic P, Dubost A, Najjari A, Ghedira K, Igual JM, Cherif A, Klenk HP, Sghaier H, Normand P. Draft genome sequence of Promicromonospora panici sp. nov., a novel ionizing-radiation-resistant actinobacterium isolated from roots of the desert plant Panicum turgidum. Extremophiles 2020; 25:25-38. [PMID: 33104875 DOI: 10.1007/s00792-020-01207-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 10/07/2020] [Indexed: 11/26/2022]
Abstract
A novel strain of the genus Promicromonospora, designated PT9T, was recovered from irradiated roots of the xerophyte Panicum turgidum collected from the Ksar Ghilane oasis in southern Tunisia. Strain PT9T is aerobic, non-spore-forming, Gram- positive actinomycete that produces branched hyphae and forms white to yellowish-white colonies. Chemotaxonomic features, including fatty acids, whole cell sugars and polar lipid profiles, support the assignment of PT9T to the genus Promicromonospora. The genomic relatedness indexes based on DNA-DNA hybridization and average nucleotide identity values revealed a significant genomic divergence between strain PT9T and all sequenced type strains of the taxon. Phylogenomic analysis showed that isolate PT9T was most closely related to Promicromonospora soli CGMCC 4.7398T. Phenotypic and phylogenomic analyses suggest that isolate PT9T represents a novel species of the genus Promicromonospora, for which the name Promicromonospora panici sp. nov. is proposed. The type strain is PT9T (LMG 31103T = DSM 108613T).The isolate PT9T is an ionizing-radiation-resistant actinobacterium (D10 value = 2.6 kGy), with resistance to desiccation and hydrogen peroxide. The complete genome sequence of PT9T consists of 6,582,650 bps with 71.2% G+C content and 6291 protein-coding sequences. This genome will help to decipher the microbial genetic bases for ionizing-radiation resistance mechanisms including the response to oxidative stress.
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Affiliation(s)
- Sihem Guesmi
- National Agronomy Institute of Tunisia, Avenue Charles Nicolle, 1082, Tunis, Mahrajène, Tunisia
- Laboratory "Energy and Matter for Development of Nuclear Sciences" (LR16CNSTN02), National Center for Nuclear Sciences and Technology, Sidi Thabet Technopark, 2020, Sidi Thabet, Tunisia
| | - Imen Nouioui
- School of Natural and Environmental Sciences, Newcastle University, Ridley Building 2, Newcastle upon Tyne, NE1 7RU, UK
- Leibniz Institute DSMZ-German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany
| | - Petar Pujic
- Université de Lyon, Université Lyon 1, Lyon, France
- CNRS, UMR 5557, Écologie Microbienne, UMR1418, INRA, 69622 Cedex, Villeurbanne, France
| | - Audrey Dubost
- Université de Lyon, Université Lyon 1, Lyon, France
- CNRS, UMR 5557, Écologie Microbienne, UMR1418, INRA, 69622 Cedex, Villeurbanne, France
| | - Afef Najjari
- Université de Tunis el Manar, Faculté des Sciences de Tunis, LR03ES03 Microorganismes et Biomolécules Actives, 2092, Tunis, Tunisia
| | - Kais Ghedira
- Laboratory of Bioinformatics, Biomathematics and Biostatistics-LR16IPT09, Institut Pasteur de Tunis, Université de Tunis El Manar, 1002, Tunis, Tunisia
| | - José M Igual
- Instituto de Recursos Naturales y Agrobiología de Salamanca, Consejo Superior de Investigaciones Científicas (IRNASA-CSIC), c/Cordel de Merinas 40-52, 37008, Salamanca, Spain
| | - Ameur Cherif
- University Manouba, ISBST, BVBGR-LR11ES31,, Biotechpole Sidi Thabet, 2020, Ariana, Tunisia
| | - Hans-Peter Klenk
- School of Natural and Environmental Sciences, Newcastle University, Ridley Building 2, Newcastle upon Tyne, NE1 7RU, UK
| | - Haïtham Sghaier
- Laboratory "Energy and Matter for Development of Nuclear Sciences" (LR16CNSTN02), National Center for Nuclear Sciences and Technology, Sidi Thabet Technopark, 2020, Sidi Thabet, Tunisia
- University Manouba, ISBST, BVBGR-LR11ES31,, Biotechpole Sidi Thabet, 2020, Ariana, Tunisia
| | - Philippe Normand
- Université de Lyon, Université Lyon 1, Lyon, France.
- CNRS, UMR 5557, Écologie Microbienne, UMR1418, INRA, 69622 Cedex, Villeurbanne, France.
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11
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Hacker BC, Rafat M. Organoids as Complex In Vitro Models for Studying Radiation-Induced Cell Recruitment. Cell Mol Bioeng 2020; 13:341-357. [PMID: 32952734 PMCID: PMC7479086 DOI: 10.1007/s12195-020-00625-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 06/10/2020] [Indexed: 01/01/2023] Open
Abstract
Patients with triple negative breast cancer (TNBC) typically receive chemotherapy, surgery, and radiation therapy. Although this treatment improves prognosis for most patients, some patients continue to experience recurrence within 5 years. Preclinical studies have shown that immune cell infiltration at the irradiated site may play a significant role in tumor cell recruitment; however, little is known about the mechanisms that govern this process. This lack of knowledge highlights the need to evaluate radiation-induced cell infiltration with models that have controllable variables and maintain biological integrity. Mammary organoids are multicellular three-dimensional (3D) in vitro models, and they have been used to examine many aspects of mammary development and tumorigenesis. Organoids are also emerging as a powerful tool to investigate normal tissue radiation damage. In this review, we evaluate recent advances in mammary organoid technology, consider the advantages of using organoids to study radiation response, and discuss future directions for the applications of this technique.
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Affiliation(s)
- Benjamin C. Hacker
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN USA
| | - Marjan Rafat
- Department of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN USA
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN USA
- Department of Radiation Oncology, Vanderbilt University Medical Center, Nashville, TN USA
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Borsci G, Barbieri S, Guardamagna I, Lonati L, Ottolenghi A, Ivaldi GB, Liotta M, Tabarelli de Fatis P, Baiocco G, Savio M. Immunophenotyping Reveals No Significant Perturbation to PBMC Subsets When Co-cultured With Colorectal Adenocarcinoma Caco-2 Cells Exposed to X-Rays. Front Immunol 2020; 11:1077. [PMID: 32655551 PMCID: PMC7326036 DOI: 10.3389/fimmu.2020.01077] [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: 12/23/2019] [Accepted: 05/04/2020] [Indexed: 12/22/2022] Open
Abstract
In vitro co-culture models between tumor cells and peripheral blood mononuclear cells (PBMCs) allow studying the interplay between these cell populations, potentially gaining insight into the in vivo response of the immune system to the presence of the tumor, as well as to possible other agents as radiation used for therapeutic purposes. However, great care is needed in the experimental optimization of models and choice of conditions, as some setups might offer a limited possibility to capture subtle immune perturbations. A co-culture model of PBMCs from healthy donors and colorectal adenocarcinoma Caco-2 cells was successfully adopted in a previous work to measure effects on Caco-2 and modulation of signaling when these latter are irradiated. We here tested if the same experimental setting allows to measure perturbations to the main PBMC subsets: we performed immunophenotyping by means of flow cytometry and quantified helper and cytotoxic T cells, NK cells, and B cells, when PBMCs are cultured alone (control), in presence of non-irradiated Caco-2 cells or when these latter are exposed to a 10 Gy X-ray dose from a conventional radiotherapy accelerator. To measure a baseline response in all experimental conditions, PBMCs were not further stimulated, but only followed in their time-evolution up to 72 h post-irradiation of Caco-2 and assembly of the co-culture. In this time interval PBMCs maintain a high viability (measured via the MTT assay). Caco-2 viability (MTT) is slightly affected by the presence of PBMCs and by the high radiation dose, confirming their radioresistance. Immunophenotyping results indicate a large inter-individual variability for different population subsets already at the control level. We analyzed relative population changes and we detected only a small but significant perturbation to cytotoxic T cells. We conclude that this model, as it is, is not adequate for the measurements of subtler immune perturbations (if any, not washed-out by inter-individual differences). For this purpose, the model needs to be modified and further optimized e.g., including a pre-treatment strategy for PBMCs. We also performed a pooled analysis of all experimental observations with principal component analysis, suggesting the potential of this tool to identify subpopulations of similarly-responding donors.
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Affiliation(s)
- Giuseppina Borsci
- Laboratory of Radiation Biophysics and Radiobiology, Department of Physics, University of Pavia, Pavia, Italy
| | - Sofia Barbieri
- Laboratory of Radiation Biophysics and Radiobiology, Department of Physics, University of Pavia, Pavia, Italy
| | - Isabella Guardamagna
- Laboratory of Radiation Biophysics and Radiobiology, Department of Physics, University of Pavia, Pavia, Italy
| | - Leonardo Lonati
- Laboratory of Radiation Biophysics and Radiobiology, Department of Physics, University of Pavia, Pavia, Italy
| | - Andrea Ottolenghi
- Laboratory of Radiation Biophysics and Radiobiology, Department of Physics, University of Pavia, Pavia, Italy
| | | | - Marco Liotta
- Unit of Medical Physics, ICS Maugeri, IRCCS, Pavia, Italy
| | | | - Giorgio Baiocco
- Laboratory of Radiation Biophysics and Radiobiology, Department of Physics, University of Pavia, Pavia, Italy
| | - Monica Savio
- Immunology and General Pathology Unit, Department of Molecular Medicine, University of Pavia, Pavia, Italy
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Palumbo P, Lombardi F, Cifone MG, Cinque B. The Epithelial Barrier Model Shows That the Properties of VSL#3 Depend from Where it is Manufactured. Endocr Metab Immune Disord Drug Targets 2019; 19:199-206. [PMID: 30360752 PMCID: PMC6425067 DOI: 10.2174/1871530318666181022164505] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Revised: 08/29/2018] [Accepted: 09/17/2018] [Indexed: 02/07/2023]
Abstract
Background: VSL#3 has been extensively investigated and is currently recommended for the prevention and treatment of chronic pouchitis and ulcerative colitis. Nonetheless, in vitro and in vivo stud-ies have recently shown variability in the VSL#3 efficacy often attributed to the manufacturing process. Objective: The aim was to comparatively study the in vitro effects of two VSL#3 preparations produced in different sites (named US- and Italy-made VSL#3) on CaCo-2 epithelial barrier model in terms of trans-epithelial electrical resistance (TEER), dextran flux and expression of Tight Junctions (TJ) proteins i.e. zonulin-1 (ZO-1) and occludin, in the absence or presence of a heat stress-related damage of mono-layer. Methods: TEER was evaluated on CaCo-2 differentiated monolayers. Epithelial permeability of polarized monolayers was assessed by measuring the FITC-labeled dextran flux from the apical to basolateral chambers. ZO-1/occludin levels were analyzed by western blot analysis. A set of experiments was per-formed to compare the effects of both VSL#3 on TEER values, dextran flux and ZO-1/occludin expres-sion in CaCo-2 monolayers after heat stress exposure. Results: US- and Italy-made VSL#3 have opposing effects on TEER values, dextran flux, and ZO-1/occludin expression, being all these parameters negatively influenced just by Italy-made product. US-made probiotic did not affect baseline TEER, dextran flux and ZO-1 expression and strongly increased occludin levels. Of note, pre-treatment of monolayer with US-made VSL#3, but not Italy-made product, totally prevented the heat-induced epithelial barrier integrity loss. Conclusion: Our data trigger the need for reassessing efficacy or safety of the Italy-made VSL#3 con-sidering intestinal epithelial barrier plays an important role in maintaining host health.
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Affiliation(s)
- Paola Palumbo
- Department of Life, Health & Environmental Sciences, University of L'Aquila - Building Delta 6, Coppito, L'Aquila, Italy
| | - Francesca Lombardi
- Department of Life, Health & Environmental Sciences, University of L'Aquila - Building Delta 6, Coppito, L'Aquila, Italy
| | - Maria Grazia Cifone
- Department of Life, Health & Environmental Sciences, University of L'Aquila - Building Delta 6, Coppito, L'Aquila, Italy
| | - Benedetta Cinque
- Department of Life, Health & Environmental Sciences, University of L'Aquila - Building Delta 6, Coppito, L'Aquila, Italy
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Modeling radiation injury-induced cell death and countermeasure drug responses in a human Gut-on-a-Chip. Cell Death Dis 2018; 9:223. [PMID: 29445080 PMCID: PMC5833800 DOI: 10.1038/s41419-018-0304-8] [Citation(s) in RCA: 114] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 12/13/2017] [Accepted: 01/12/2018] [Indexed: 12/24/2022]
Abstract
Studies on human intestinal injury induced by acute exposure to γ-radiation commonly rely on use of animal models because culture systems do not faithfully mimic human intestinal physiology. Here we used a human Gut-on-a-Chip (Gut Chip) microfluidic device lined by human intestinal epithelial cells and vascular endothelial cells to model radiation injury and assess the efficacy of radiation countermeasure drugs in vitro. Exposure of the Gut Chip to γ-radiation resulted in increased generation of reactive oxygen species, cytotoxicity, apoptosis, and DNA fragmentation, as well as villus blunting, disruption of tight junctions, and compromise of intestinal barrier integrity. In contrast, pre-treatment with a potential prophylactic radiation countermeasure drug, dimethyloxaloylglycine (DMOG), significantly suppressed all of these injury responses. Thus, the human Gut Chip may serve as an in vitro platform for studying radiation-induced cell death and associate gastrointestinal acute syndrome, in addition to screening of novel radio-protective medical countermeasure drugs.
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Babini G, Morini J, Barbieri S, Baiocco G, Ivaldi GB, Liotta M, Tabarelli de Fatis P, Ottolenghi A. A Co-culture Method to Investigate the Crosstalk Between X-ray Irradiated Caco-2 Cells and PBMC. J Vis Exp 2018. [PMID: 29443050 PMCID: PMC5912320 DOI: 10.3791/56908] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The protocol adopted in this work aims at unraveling how X-rays perturb the functioning of the intestinal barrier, focusing on the interplay between colorectal tumor cells and the immune system. Colorectal carcinoma is among the most common type of cancer, typically treated by surgery, chemotherapy, and radiotherapy. Advantages of radiotherapy in targeting the tumor are well known. However, even limited exposures of healthy tissues are of great concern, particularly regarding the effects on the intestinal barrier and the immune system. The adopted setup allows to study the interplay between two cell populations in a condition more similar to the physiological one, when compared to normal cell cultures. For this purpose, we resort to different techniques and we used an in vitro co-culture model, based on Caco-2 cells differentiated as a monolayer and PBMC, sharing the same culture medium. This protocol has been developed to focus on both macroscopic effects, i.e. cell viability and Trans-Epithelial Electrical Resistance (TEER), and, through western blot, molecular alterations, i.e. the activation of inflammatory pathway in immune cells and the tight junction protein expression in Caco-2 cells. Initial evaluation of radiation effects on Caco-2 cell viability was assessed via the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) and Trypan blue assays, while TEER was measured at fixed time intervals through an ohmmeter specifically designed for co-culture systems. In this way, the effects due to radiation, the presence of Peripheral Blood Mononuclear Cells (PBMC), and eventually their synergistic effect, can be demonstrated. Through these complementary techniques, we observed a high radio-resistance of Caco-2 within the range of 2 - 10 Gy of X-rays and an increased Caco-2 monolayer permeability when PBMCs were added. In particular, PBMC presence was found to be associated with the variation in the tight junction scaffold proteins expression.
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Affiliation(s)
| | - Jacopo Morini
- Dipartimento di Fisica, Università degli Studi di Pavia
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