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Thokchom SK, Indracanti N, Khanna A, Indraganti PK. Safety evaluation of 5-hydroxytryptophan and S-(2-aminoethyl)isothiouronium bromide hydrobromide on rodent lungs. Indian J Pharmacol 2024; 56:28-36. [PMID: 38454586 PMCID: PMC11001180 DOI: 10.4103/ijp.ijp_176_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 06/28/2023] [Accepted: 01/29/2024] [Indexed: 03/09/2024] Open
Abstract
OBJECTIVES During the past few decades, various compounds have been researched for their potential as radioprotectants, and many of them were found to be safe and effective in several preclinical models. However, many of these compounds were found to have serious adverse effects when evaluated in clinical settings, thereby making them unsuitable for human applications. 5-hydroxytryptophan (5-HTP) and S-(2-aminoethyl) isothiouronium bromide hydrobromide (AET) act in a synergistic fashion to promote radioprotection. The present study primarily emphasizes the safety of fixed dose of 5-HTP + AET in the lungs of C57BL/6 mice, a well-known model used in drug safety studies. MATERIALS AND METHODS Post-administration of the combination of HTP+AET at specific time points, blood and bronchoalveolar lavage fluid (BALF) were collected for the analysis of inflammatory and oxidative stress markers of the lungs. Thereafter, the mice were sacrificed and the lungs were dissected out, weighed, and fixed in formalin for histopathological studies. RESULTS The inflammatory biomarkers: tumor necrosis factor-alpha and interleukin-10 and oxidative stress biomarkers: 8-isoprostane and 8-hydroxy-2'-deoxyguanosine were found to have normal levels in blood and BALF in both control and treatment groups, which was further supported by normal histological findings. In addition, other endpoints such as food and water intake were found to be within normal limits. CONCLUSION The present safety study reflects that the combination has no adverse effects on the lungs of the experimental mouse. Further, evaluation in higher mammals including nonhuman primates is essential prior to validation of the safety of the combination in humans.
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Affiliation(s)
- Suresh Kumar Thokchom
- Drug Repurpose and Translational Lab, Department of CBRN, Institute of Nuclear Medicine and Allied Sciences (INMAS), Defence Research and Development Organisation (DRDO), Timarpur, Delhi, India
| | - Namita Indracanti
- Drug Repurpose and Translational Lab, Department of CBRN, Institute of Nuclear Medicine and Allied Sciences (INMAS), Defence Research and Development Organisation (DRDO), Timarpur, Delhi, India
| | - Anoushka Khanna
- Drug Repurpose and Translational Lab, Department of CBRN, Institute of Nuclear Medicine and Allied Sciences (INMAS), Defence Research and Development Organisation (DRDO), Timarpur, Delhi, India
| | - Prem Kumar Indraganti
- Drug Repurpose and Translational Lab, Department of CBRN, Institute of Nuclear Medicine and Allied Sciences (INMAS), Defence Research and Development Organisation (DRDO), Timarpur, Delhi, India
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Brandt F, Ullrich M, Seifert V, Haase-Kohn C, Richter S, Kniess T, Pietzsch J, Laube M. Exploring Nitric Oxide (NO)-Releasing Celecoxib Derivatives as Modulators of Radioresponse in Pheochromocytoma Cells. Molecules 2022; 27:molecules27196587. [PMID: 36235124 PMCID: PMC9573605 DOI: 10.3390/molecules27196587] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 09/29/2022] [Accepted: 10/01/2022] [Indexed: 11/06/2022] Open
Abstract
COX-2 can be considered as a clinically relevant molecular target for adjuvant, in particular radiosensitizing treatments. In this regard, using selective COX-2 inhibitors, e.g., in combination with radiotherapy or endoradiotherapy, represents an interesting treatment option. Based on our own findings that nitric oxide (NO)-releasing and celecoxib-derived COX-2 inhibitors (COXIBs) showed promising radiosensitizing effects in vitro, we herein present the development of a series of eight novel NO-COXIBs differing in the peripheral substitution pattern and their chemical and in vitro characterization. COX-1 and COX-2 inhibition potency was found to be comparable to the lead NO-COXIBs, and NO-releasing properties were demonstrated to be mainly influenced by the substituent in 4-position of the pyrazole (Cl vs. H). Introduction of the N-propionamide at the sulfamoyl residue as a potential prodrug strategy lowered lipophilicity markedly and abolished COX inhibition while NO-releasing properties were not markedly influenced. NO-COXIBs were tested in vitro for a combination with single-dose external X-ray irradiation as well as [177Lu]LuCl3 treatment in HIF2α-positive mouse pheochromocytoma (MPC-HIF2a) tumor spheroids. When applied directly before X-ray irradiation or 177Lu treatment, NO-COXIBs showed radioprotective effects, as did celecoxib, which was used as a control. Radiosensitizing effects were observed when applied shortly after X-ray irradiation. Overall, the NO-COXIBs were found to be more radioprotective compared with celecoxib, which does not warrant further preclinical studies with the NO-COXIBs for the treatment of pheochromocytoma. However, evaluation as radioprotective agents for healthy tissues could be considered for the NO-COXIBs developed here, especially when used directly before irradiation.
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Affiliation(s)
- Florian Brandt
- Department of Radiopharmaceutical and Chemical Biology, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
- Faculty of Chemistry and Food Chemistry, School of Science, Technische Universität Dresden, Mommsenstrasse 4, 01062 Dresden, Germany
| | - Martin Ullrich
- Department of Radiopharmaceutical and Chemical Biology, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
| | - Verena Seifert
- Department of Radiopharmaceutical and Chemical Biology, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
- Faculty of Chemistry and Food Chemistry, School of Science, Technische Universität Dresden, Mommsenstrasse 4, 01062 Dresden, Germany
| | - Cathleen Haase-Kohn
- Department of Radiopharmaceutical and Chemical Biology, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
| | - Susan Richter
- Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Carl Gustav Carus at the Technische Universität Dresden, Fetscherstraße 74, 01307 Dresden, Germany
| | - Torsten Kniess
- Department of Radiopharmaceutical and Chemical Biology, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
| | - Jens Pietzsch
- Department of Radiopharmaceutical and Chemical Biology, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
- Faculty of Chemistry and Food Chemistry, School of Science, Technische Universität Dresden, Mommsenstrasse 4, 01062 Dresden, Germany
- Correspondence: (J.P.); (M.L.)
| | - Markus Laube
- Department of Radiopharmaceutical and Chemical Biology, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328 Dresden, Germany
- Correspondence: (J.P.); (M.L.)
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3
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El Adham EK, Hassan AI, A Dawoud MM. Evaluating the role of propolis and bee venom on the oxidative stress induced by gamma rays in rats. Sci Rep 2022; 12:2656. [PMID: 35173181 PMCID: PMC8850618 DOI: 10.1038/s41598-022-05979-1] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 11/12/2021] [Indexed: 12/17/2022] Open
Abstract
Honeybee products consist of many substances, which have long been known for their medicinal and health-promoting properties. This study set out to appraise the protective potential of Egyptian propolis (EP) and bee venom (BV) separately or combined against total body irradiation (TBI) induced oxidative injury in rats. Besides, we assessed the bioactive components in EP and BV using HPLC and UPLC/ ESI-MS analysis in the positive ion mode. The animals were subjected to a source of gamma ionizing radiation at a dose of 6 Gy. Propolis and BV were administered independently and in combination before 14 days of γ-irradiation. Liver and kidney functions were estimated besides, DNA damage index (8- OHdG) by ELISA. Antioxidants, including glutathione (GSH), catalase (CAT), superoxide dismutase (SOD), and glutathione peroxidase (GPx) were detected. Gene expression technique investigated for BAX, BCL2, and in plasma also miR125b expression in serum of rats. Besides, the histopathological for the brain, liver, kidney, and heart were investigated. In addition, lipid peroxidation was investigated in plasma and in the previous organs. The present results provide opportunities to advance the use of bee products as promising medicinal sources.
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Affiliation(s)
- Eithar K El Adham
- Radioisotopes Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Dokki, Giza, 12311, Egypt
| | - Amal I Hassan
- Radioisotopes Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Dokki, Giza, 12311, Egypt.
| | - M M A Dawoud
- Radioisotopes Department, Nuclear Research Center, Egyptian Atomic Energy Authority, Dokki, Giza, 12311, Egypt
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4
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Pedrosa VM, Sanches AG, da Silva MB, Gratão PL, Isaac VL, Gindri M, Teixeira GH. Production of mycosporine-like amino acid (MAA)-loaded emulsions as chemical barriers to control sunscald in fruits and vegetables. J Sci Food Agric 2022; 102:801-812. [PMID: 34223643 DOI: 10.1002/jsfa.11415] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 06/11/2021] [Accepted: 07/05/2021] [Indexed: 06/13/2023]
Abstract
BACKGROUND Sunscald is a physiological disorder that occurs in many horticultural products when exposed to excessive solar radiation and high temperatures. Traditionally, sunscald is controlled using physical barriers that reflect radiation, however this practice is not always efficient. A possible alternative would be the use of chemical barriers, such as mycosporine-like amino acids (MAAs), which protect aquatic organisms against ultraviolet (UV) radiation. Thus, this study aimed to develop a lipid-based emulsion containing MAAs for using in the preharvest of horticultural products. RESULTS Emulsions were developed using 10% (w/v) of corn oil (CO) and soybean oil (SO), carnauba wax (CW), and beeswax (BW) as lipid bases (LBs). The emulsion containing CW and ammonium hydroxide was the most stable, resembling commercial wax. Therefore, this formulation was used as the basis for the incorporation of the commercial product Helioguard™ 365, a source of MAA, in concentrations of 0%, 1%, 2%, and 4% (v/v). The MAA incorporation resulted in little modifications in the stability of the emulsion, providing an increase in the absorbance with peaks in the UV-B ranging from 280 to 300 nm. CONCLUSION The lipid-base emulsion containing MAAs could be used as a chemical barrier to control sunscald in horticultural products. © 2021 Society of Chemical Industry.
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Affiliation(s)
- Vanessa Md Pedrosa
- Faculdade de Ciências Agrárias e Veterinárias (FCAV), Campus de Jaboticabal, Departamento de Ciências da Produção Agrícola, Universidade Estadual Paulista (UNESP), Jaboticabal, Brazil
| | - Alex G Sanches
- Faculdade de Ciências Agrárias e Veterinárias (FCAV), Campus de Jaboticabal, Departamento de Ciências da Produção Agrícola, Universidade Estadual Paulista (UNESP), Jaboticabal, Brazil
| | - Maryelle B da Silva
- Faculdade de Ciências Agrárias e Veterinárias (FCAV), Campus de Jaboticabal, Departamento de Ciências da Produção Agrícola, Universidade Estadual Paulista (UNESP), Jaboticabal, Brazil
| | - Priscila L Gratão
- Faculdade de Ciências Agrárias e Veterinárias (FCAV), Campus de Jaboticabal, Departamento de Biologia Aplicada à Agropecuária, Universidade Estadual Paulista (UNESP), Jaboticabal, Brazil
| | - Vera Lb Isaac
- Faculdade de Ciências Farmacêuticas (FCF), Campus de Araraquara, Departamento de Fármacos e Medicamentos Rodovia Araraquara Jaú, Universidade Estadual Paulista (UNESP), Araraquara, Brazil
| | - Marcelo Gindri
- Faculdade de Ciências Agrárias e Veterinárias (FCAV), Campus de Jaboticabal, Departamento de Zootecnia, Universidade Estadual Paulista (UNESP), Jaboticabal, Brazil
| | - Gustavo Ha Teixeira
- Faculdade de Ciências Agrárias e Veterinárias (FCAV), Campus de Jaboticabal, Departamento de Ciências da Produção Agrícola, Universidade Estadual Paulista (UNESP), Jaboticabal, Brazil
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Nemec-Bakk AS, Sridharan V, Landes RD, Singh P, Cao M, Seawright JW, Liu X, Zheng G, Dominic P, Pathak R, Boerma M. Mitigation of late cardiovascular effects of oxygen ion radiation by γ-tocotrienol in a mouse model. Life Sci Space Res (Amst) 2021; 31:43-50. [PMID: 34689949 PMCID: PMC8548672 DOI: 10.1016/j.lssr.2021.07.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 07/02/2021] [Accepted: 07/29/2021] [Indexed: 05/14/2023]
Abstract
PURPOSE While there is concern about degenerative tissue effects of exposure to space radiation during deep-space missions, there are no pharmacological countermeasures against these adverse effects. γ-Tocotrienol (GT3) is a natural form of vitamin E that has anti-oxidant properties, modifies cholesterol metabolism, and has anti-inflammatory and endothelial cell protective properties. The purpose of this study was to test whether GT3 could mitigate cardiovascular effects of oxygen ion (16O) irradiation in a mouse model. MATERIALS AND METHODS Male C57BL/6 J mice were exposed to whole-body 16O (600 MeV/n) irradiation (0.26-0.33 Gy/min) at doses of 0 or 0.25 Gy at 6 months of age and were followed up to 9 months after irradiation. Animals were administered GT3 (50 mg/kg/day s.c.) or vehicle, on Monday - Friday starting on day 3 after irradiation for a total of 16 administrations. Ultrasonography was used to measure in vivo cardiac function and blood flow parameters. Cardiac tissue remodeling and inflammatory infiltration were assessed with histology and immunoblot analysis at 2 weeks, 3 and 9 months after radiation. RESULTS GT3 mitigated the effects of 16O radiation on cardiac function, the expression of a collagen type III peptide, and markers of mast cells, T-cells and monocytes/macrophages in the left ventricle. CONCLUSIONS GT3 may be a potential countermeasure against late degenerative tissue effects of high-linear energy transfer radiation in the heart.
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Affiliation(s)
- Ashley S Nemec-Bakk
- Division of Radiation Health, Department of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, AR, USA.
| | - Vijayalakshmi Sridharan
- Division of Radiation Health, Department of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Reid D Landes
- Department of Biostatistics, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Preeti Singh
- Division of Radiation Health, Department of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Maohua Cao
- College of Dentistry, Texas A&M University, Dallas TX, USA
| | | | - Xingui Liu
- Department of Pharmacodynamics, University of Florida, Gainesville, FL, USA
| | - Guangrong Zheng
- Department of Medicinal Chemistry, University of Florida, Gainesville, FL, USA
| | - Paari Dominic
- Department of Medicine and Center of Excellence for Cardiovascular Diseases & Sciences, Louisiana State University Health Sciences Center, Shreveport, LA, USA
| | - Rupak Pathak
- Division of Radiation Health, Department of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Marjan Boerma
- Division of Radiation Health, Department of Pharmaceutical Sciences, University of Arkansas for Medical Sciences, Little Rock, AR, USA
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6
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Satyamitra MM, Cassatt DR, Taliaferro LP. Meeting Commentary: A Poly-Pharmacy Approach to Mitigate Acute Radiation Syndrome (ARS). Radiat Res 2021; 196:423-428. [PMID: 34270773 PMCID: PMC8522554 DOI: 10.1667/rade-21-00053.1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 06/23/2021] [Indexed: 11/03/2022]
Affiliation(s)
- Merriline M. Satyamitra
- Radiation and Nuclear Countermeasures Program (RNCP), Division of
Allergy, Immunology and Transplantation (DAIT), National Institute of Allergy
and Infectious Diseases (NIAID), National Institutes of Health (NIH), Rockville,
Maryland
| | - David R. Cassatt
- Radiation and Nuclear Countermeasures Program (RNCP), Division of
Allergy, Immunology and Transplantation (DAIT), National Institute of Allergy
and Infectious Diseases (NIAID), National Institutes of Health (NIH), Rockville,
Maryland
| | - Lanyn P. Taliaferro
- Radiation and Nuclear Countermeasures Program (RNCP), Division of
Allergy, Immunology and Transplantation (DAIT), National Institute of Allergy
and Infectious Diseases (NIAID), National Institutes of Health (NIH), Rockville,
Maryland
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7
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Dowlath MJH, Karuppannan SK, Sinha P, Dowlath NS, Arunachalam KD, Ravindran B, Chang SW, Nguyen-Tri P, Nguyen DD. Effects of radiation and role of plants in radioprotection: A critical review. Sci Total Environ 2021; 779:146431. [PMID: 34030282 DOI: 10.1016/j.scitotenv.2021.146431] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 03/07/2021] [Accepted: 03/08/2021] [Indexed: 05/16/2023]
Abstract
Radiation can be lethal at high doses, whereas controlled doses are useful in medical applications. Other applications include power generation, agriculture sterilization, nuclear weapons, and archeology. Radiation damages genetic material, which is reflected in genotoxicity and can cause hereditary damage. In the medical field, it is essential to avoid the harmful effects of radiation. Radiation countermeasures and the need for radioprotective agents have been explored in recent years. Considering plants that evolve in radiative conditions, their ability to protect organisms against radiation has been studied and demonstrated. Crude extracts, fractioned extracts, isolated phytocompounds, and plant polysaccharides from various plants have been used in radioprotection studies, and their efficiency has been proven in various in vitro and in vivo experimental models. It is important to identify the mechanism of action to develop a potent plant-based radioprotective agent. To identify this protective mechanism, it is necessary to understand the damage caused by radiation in biological systems. This review intends to discuss the effects of ionizing radiation on biological systems and evaluate plant-based radioprotectants that have tested thus far as well as their mechanism of action in protecting against the toxic effects of radiation. From the review, the mechanism of radioprotection exhibited by the plant-based products could be understood. Meanwhile, we strongly suggest that the potential products identified so far should undergo clinical trials for critically evaluating their effects and for developing an ideal and compatible radioprotectant with no side-effects.
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Affiliation(s)
- Mohammed Junaid Hussain Dowlath
- Center for Environmental Nuclear Research, Directorate of Research, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur, 603203, Kanchipuram, Chennai, Tamil Nadu, India
| | - Sathish Kumar Karuppannan
- Center for Environmental Nuclear Research, Directorate of Research, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur, 603203, Kanchipuram, Chennai, Tamil Nadu, India
| | - Pamela Sinha
- Project Management, Bioneeds India Pvt. Ltd, Peenya Industrial Area, Bengaluru 560058, India
| | - Nihala Sultana Dowlath
- Department of Biochemistry, Ethiraj College for Women, Chennai, Tamil Nadu 600008, India
| | - Kantha Deivi Arunachalam
- Center for Environmental Nuclear Research, Directorate of Research, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur, 603203, Kanchipuram, Chennai, Tamil Nadu, India.
| | - B Ravindran
- Department of Environmental Energy and Engineering, Kyonggi University Youngtong-Gu, Suwon, Gyeonggi-Do 16227, South Korea.
| | - S Woong Chang
- Department of Environmental Energy and Engineering, Kyonggi University Youngtong-Gu, Suwon, Gyeonggi-Do 16227, South Korea
| | - Phuong Nguyen-Tri
- Département de Chimie, Biochimie et Physique, Université du Québec à Trois-Rivières (UQTR), Trois-Rivières, QC G8Z 4M3, Canada
| | - D Duc Nguyen
- Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, 300A Nguyen Tat Thanh, District 4, Ho Chi Minh City, 755414, Vietnam; Department of Environmental Energy and Engineering, Kyonggi University Youngtong-Gu, Suwon, Gyeonggi-Do 16227, South Korea.
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Tian YN, Zhong RH, Wei JB, Luo HH, Eyal Y, Jin HL, Wu LJ, Liang KY, Li YM, Chen SZ, Zhang ZQ, Pang XQ. Arabidopsis CHLOROPHYLLASE 1 protects young leaves from long-term photodamage by facilitating FtsH-mediated D1 degradation in photosystem II repair. Mol Plant 2021; 14:1149-1167. [PMID: 33857689 DOI: 10.1016/j.molp.2021.04.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 04/01/2021] [Accepted: 04/08/2021] [Indexed: 06/12/2023]
Abstract
The proteolytic degradation of the photodamaged D1 core subunit during the photosystem II (PSII) repair cycle is well understood, but chlorophyll turnover during D1 degradation remains unclear. Here, we report that Arabidopsis thaliana CHLOROPHYLLASE 1 (CLH1) plays important roles in the PSII repair process. The abundance of CLH1 and CLH2 peaks in young leaves and is induced by high-light exposure. Seedlings of clh1 single and clh1-1/2-2 double mutants display increased photoinhibition after long-term high-light exposure, whereas seedlings overexpressing CLH1 have enhanced light tolerance compared with the wild type. CLH1 is localized in the developing chloroplasts of young leaves and associates with the PSII-dismantling complexes RCC1 and RC47, with a preference for the latter upon exposure to high light. Furthermore, degradation of damaged D1 protein is retarded in young clh1-1/2-2 leaves after 18-h high-light exposure but is rescued by the addition of recombinant CLH1 in vitro. Moreover, overexpression of CLH1 in a variegated mutant (var2-2) that lacks thylakoid protease FtsH2, with which CLH1 interacts, suppresses the variegation and restores D1 degradation. A var2-2 clh1-1/2-2 triple mutant shows more severe variegation and seedling death. Taken together, these results establish CLH1 as a long-sought chlorophyll dephytylation enzyme that is involved in PSII repair and functions in long-term adaptation of young leaves to high-light exposure by facilitating FtsH-mediated D1 degradation.
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Affiliation(s)
- Ya-Nan Tian
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, South China Agricultural University, Guangzhou 510642, People's Republic of China; College of Life Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Rui-Hao Zhong
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, South China Agricultural University, Guangzhou 510642, People's Republic of China; College of Life Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Jun-Bin Wei
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, South China Agricultural University, Guangzhou 510642, People's Republic of China; College of Life Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Hong-Hui Luo
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, South China Agricultural University, Guangzhou 510642, People's Republic of China; College of Horticulture, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Yoram Eyal
- Institute of Plant Sciences, The Volcani Center, Agricultural Research Organization, Bet Dagan 50250, Israel
| | - Hong-Lei Jin
- Institute of Medical Plant Physiology and Ecology, School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, People's Republic of China
| | - La-Jie Wu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, South China Agricultural University, Guangzhou 510642, People's Republic of China; College of Life Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Ke-Ying Liang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, South China Agricultural University, Guangzhou 510642, People's Republic of China; College of Life Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Ying-Man Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, South China Agricultural University, Guangzhou 510642, People's Republic of China; College of Life Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Shu-Zhen Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, South China Agricultural University, Guangzhou 510642, People's Republic of China; College of Life Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Zhao-Qi Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, South China Agricultural University, Guangzhou 510642, People's Republic of China; College of Horticulture, South China Agricultural University, Guangzhou 510642, People's Republic of China.
| | - Xue-Qun Pang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, South China Agricultural University, Guangzhou 510642, People's Republic of China; College of Life Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China.
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9
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Xue JS, Zhang B, Zhan H, Lv YL, Jia XL, Wang T, Yang NY, Lou YX, Zhang ZB, Hu WJ, Gui J, Cao J, Xu P, Zhou Y, Hu JF, Li L, Yang ZN. Phenylpropanoid Derivatives Are Essential Components of Sporopollenin in Vascular Plants. Mol Plant 2020; 13:1644-1653. [PMID: 32810599 DOI: 10.1016/j.molp.2020.08.005] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 06/03/2020] [Accepted: 08/13/2020] [Indexed: 05/22/2023]
Abstract
The outer wall of pollen and spores, namely the exine, is composed of sporopollenin, which is highly resistant to chemical reagents and enzymes. In this study, we demonstrated that phenylpropanoid pathway derivatives are essential components of sporopollenin in seed plants. Spectral analyses showed that the autofluorescence of Lilium and Arabidopsis sporopollenin is similar to that of lignin. Thioacidolysis and NMR analyses of pollen from Lilium and Cryptomeria further revealed that the sporopollenin of seed plants contains phenylpropanoid derivatives, including p-hydroxybenzoate (p-BA), p-coumarate (p-CA), ferulate (FA), and lignin guaiacyl (G) units. The phenylpropanoid pathway is expressed in the tapetum in Arabidopsis, consistent with the fact that the sporopollenin precursor originates from the tapetum. Further germination and comet assays showed that this pathway plays an important role in protection of pollen against UV radiation. In the pteridophyte plant species Ophioglossum vulgatum and Lycopodium clavata, phenylpropanoid derivatives including p-BA and p-CA were also detected, but G units were not. Taken together, our results indicate that phenylpropanoid derivatives are essential for sporopollenin synthesis in vascular plants. In addition, sporopollenin autofluorescence spectra of bryophytes, such as Physcomitrella and Haplocladium, exhibit distinct characteristics compared with those of vascular plants, indicating the diversity of sporopollenin among land plants.
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Affiliation(s)
- Jing-Shi Xue
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
| | - Baocai Zhang
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - HuaDong Zhan
- State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
| | - Yong-Lin Lv
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
| | - Xin-Lei Jia
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
| | - TianHua Wang
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
| | - Nai-Ying Yang
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
| | - Yu-Xia Lou
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
| | - Zai-Bao Zhang
- College of Life Science, Xinyang Normal University, Xinyang, Henan 464000, China
| | - Wen-Jing Hu
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
| | - Jinshan Gui
- National Key Laboratory of Plant Molecular Genetics & CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Beijing 200032, China
| | - Jianguo Cao
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
| | - Ping Xu
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China
| | - Yihua Zhou
- State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
| | - Jin-Feng Hu
- Department of Natural Products Chemistry, School of Pharmacy, Fudan University, No. 826 Zhangheng Road, Shanghai, 201203, China
| | - Laigeng Li
- National Key Laboratory of Plant Molecular Genetics & CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology and Ecology, Chinese Academy of Sciences, Beijing 200032, China.
| | - Zhong-Nan Yang
- Shanghai Key Laboratory of Plant Molecular Sciences, College of Life Sciences, Shanghai Normal University, Shanghai 200234, China.
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10
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Musa AE, Shabeeb D, Okoro NOE, Agbele AT. Radiation protection by Ex-RAD: a systematic review. Environ Sci Pollut Res Int 2020; 27:33592-33600. [PMID: 32583118 DOI: 10.1007/s11356-020-09618-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 06/04/2020] [Indexed: 06/11/2023]
Abstract
Protection of normal tissues against ionizing radiation-induced damages is a critical issue in clinical and environmental radiobiology. One of the ways of accomplishing radiation protection is through the use of radioprotectors. In the search for the most effective radioprotective agent, factors such as toxicity, effect on tumors, number of tissues protected, ease of administration, long-term stability, and compatibility with other drugs need to be assessed. Thus, in the present study, we systematically review existing studies on a chemical radioprotector, Ex-RAD, with the aim of examining its efficacy of radiation protection as well as underlying mechanisms. To this end, a systematic search of the electronic databases including Pubmed, Scopus, Embase, and Google Scholar was conducted to retrieve articles investigating the radioprotective effect of Ex-RAD. From an initial search of 268 articles, and after removal of duplicates as well as applying the predetermined inclusion and exclusion criteria, 10 articles were finally included for this systematic review. Findings from the reviewed studies indicated that Ex-RAD showed potentials for effective radioprotection of the studied organs with no side effect. Furthermore, the inhibition of apoptosis through p53 signaling pathway was the main mechanism of radioprotection by Ex-RAD. However, its radioprotective effect would need to be investigated for more organs in future studies.
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Affiliation(s)
- Ahmed Eleojo Musa
- Department of Medical Physics, Tehran University of Medical Sciences, Tehran, Iran.
| | - Dheyauldeen Shabeeb
- Department of Physiology, University of Misan, Misan, Iraq
- Misan Radiotherapy Center, Misan Health Directorate, Ministry of Health/Environment, Misan, Iraq
| | - Nnamdi O E Okoro
- Department of Radiology, Obijackson Women & Children's Hospital, Okija, Anambra State, Nigeria
| | - Alaba Tolulope Agbele
- Department of Medical Physics, Tehran University of Medical Sciences, Tehran, Iran
- Department of Basic Medical Sciences, College of Health Sciences and Technology, Ijero-Ekiti, Nigeria
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11
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Nomura R. [Ⅱ. Radiation-Induced Neurocognitive Impairment-Pathophysiology and Countermeasures]. Gan To Kagaku Ryoho 2020; 47:899-904. [PMID: 32541164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Affiliation(s)
- Ryutaro Nomura
- Dept. of Neurosurgery, CyberKnife Center, Chigasaki Central Hospital
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12
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González A, Atienza V, Montoro A, Soriano JM. Use of Ganoderma lucidum (Ganodermataceae, Basidiomycota) as Radioprotector. Nutrients 2020; 12:E1143. [PMID: 32325828 PMCID: PMC7230513 DOI: 10.3390/nu12041143] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 04/14/2020] [Accepted: 04/15/2020] [Indexed: 12/30/2022] Open
Abstract
For millennia, naturopaths and physicians have used Ganoderma lucidum (reishi mushroom) for its diverse therapeutic properties, as recorded in the oldest Chinese herbal encyclopedia. Indeed, a radioprotective effect has been reported in the isolated components of its extracts. A systematic review and meta-analyses (PRISMA) was conducted in March 2020, searching databases including PubMed, Scopus, Embase, and Google Scholar, along with Clinical Trials. The inclusion criteria were ex vivo, in vitro, and in vivo studies, with full texts in English, conducted to determine the radioprotective benefits of G. lucidum, or reports in which ionizing radiation was used. From a total number of 1109 records identified, 15 full text articles were eligible, none of them were clinical trials. In vivo studies reveal the efficiency of G. lucidum aqueous extracts of polysaccharides and triterpenes in mice exposed to γ-rays. In plasmid, they can reduce radiation damage as an increment of the open circular form, as well as increase the DNA extension, as shown in vitro studies. Ex vivo studies conducted in human blood cells show the radioprotective effect of β-glucan of aqueous extract of G. lucidum, nevertheless, its implementation as radioprotector to humans is in need of further clinical research studies.
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Affiliation(s)
- Aránzazu González
- Food & Health Lab, Institute of Materials Science, University of Valencia, 46980 Paterna, Valencia, Spain;
- Joint Research Unit on Endocrinology, Nutrition and Clinical Dietetics, University of Valencia-Health Research Institute La Fe, 46021 Valencia, Spain
| | - Violeta Atienza
- Department of Botany and Geology, Faculty of Biological Sciences, University of Valencia, 46100 Burjassot, Valencia, Spain;
| | - Alegría Montoro
- Radiation Protection Service, University and Polytechnic Hospital La Fe, 46021 Valencia, Spain;
- Biomedical Imaging Research Group GIBI230, Health Research Institute La Fe, 46021 Valencia, Spain
| | - Jose M. Soriano
- Food & Health Lab, Institute of Materials Science, University of Valencia, 46980 Paterna, Valencia, Spain;
- Joint Research Unit on Endocrinology, Nutrition and Clinical Dietetics, University of Valencia-Health Research Institute La Fe, 46021 Valencia, Spain
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Rivero‐Müller A, Nees M. Preparing biomedical students for the unknown: Some unusual challenges for students to help them understand the fundamentals of empirical research. EMBO Rep 2019; 20:e49004. [PMID: 31523933 PMCID: PMC6776910 DOI: 10.15252/embr.201949004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Make teaching challenging again: a pedagogic approach to educate students on how to do science rather than learn about it.
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Affiliation(s)
- Adolfo Rivero‐Müller
- Department of Biochemistry and Molecular BiologyMedical University of LublinLublinPoland
- Faculty of Science and Engineering, Cell BiologyÅbo Akademi UniversityTurkuFinland
| | - Matthias Nees
- Department of Biochemistry and Molecular BiologyMedical University of LublinLublinPoland
- Institute of BiomedicineUniversity of TurkuTurkuFinland
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14
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Mitrović B, Stojanović M, Sekulić Ž, Andrić V, Vićentijević M, Vranješ B. Toxicity of high uranium doses in broilers and protection with mineral adsorbents. Radiat Environ Biophys 2019; 58:385-391. [PMID: 30972493 DOI: 10.1007/s00411-019-00790-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Accepted: 04/02/2019] [Indexed: 06/09/2023]
Abstract
The aim of this study was to determine the uranium distribution and histopathological changes in broiler organs (kidney, liver, and brain) and muscle after 7 days of contamination with high doses of uranyl nitrate hexahydrate (UN), and the protective efficiency of three different mineral adsorbents (organobentonite, organozeolite, and sepiolite). During the 7 days, the UN administration was 50 mg per day, and administration of adsorbents was 2 g per day immediately after UN. In control group where broilers received only UN, histopathological changes such as necrosis of intestinal villi, oedema, vacuolisation and abruption of epithelial cells in renal tubules, oedema and vacuolisation of the cytoplasm of hepatocytes, and dystrophic changes in the neurons of the medulla oblongata were observed. In contrast, when the adsorbents organobentonite, organozeolite, and sepiolite were administered, no histopathological changes were observed in liver and brain. The investigated adsorbents showed the highest protective effects in liver (80-92%), compared to the kidney (77-86%), brain (37-64%), and meat (31-63%).
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Affiliation(s)
- Branislava Mitrović
- Faculty of Veterinary Medicine, Bulevar oslobodjenja 18, Belgrade, 11000, Serbia.
| | - Mirjana Stojanović
- Institute for Technology of Nuclear and Other Mineral Row Materials, University of Belgrade, Bulevar Franše d'Eperea 86, Belgrade, 11000, Serbia
| | - Živko Sekulić
- Institute for Technology of Nuclear and Other Mineral Row Materials, University of Belgrade, Bulevar Franše d'Eperea 86, Belgrade, 11000, Serbia
| | - Velibor Andrić
- Faculty of Veterinary Medicine, Bulevar oslobodjenja 18, Belgrade, 11000, Serbia
| | - Mihajlo Vićentijević
- Science Institute of Veterinary Medicine of Serbia, Vojvode Toze 14, Belgrade, 11000, Serbia
| | - Borjana Vranješ
- Faculty of Veterinary Medicine, Bulevar oslobodjenja 18, Belgrade, 11000, Serbia
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15
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Abstract
Almost since the earliest utilization of ionizing radiation, many within the radiation community have worked toward either preventing (i.e. protecting) normal tissues from unwanted radiation injury or rescuing them from the downstream consequences of exposure. However, despite over a century of such investigations, only incremental gains have been made toward this goal and, with certainty, no outright panacea having been found. In celebration of the 60th anniversary of the International Journal of Radiation Biology and to chronicle the efforts that have been made to date, we undertook a non-rigorous survey of the articles published by normal tissue researchers in this area, using those that have appeared in the aforementioned journal as a road map. Three 'snapshots' of publications on normal tissue countermeasures were taken: the earliest (1959-1963) and most recent (2013-2018) 5-year of issues, as well as a 5-year intermediate span (1987-1991). Limiting the survey solely to articles appearing within International Journal of Radiation Biology likely reduced the number of translational studies interrogated given the basic science tenor of this particular publication. In addition, by taking 'snapshots' rather than considering the entire breadth of the journal's history in this field, important papers that were published during the interim periods were omitted, for which we apologize. Nonetheless, since the journal's inception, we observed that, during the chosen periods, the majority of studies undertaken in the field of normal tissue countermeasures, whether investigating radiation protectants, mitigators or treatments, have focused on agents that interfere with the physical, chemical and/or biological effects known to occur during the acute period following whole body/high single dose exposures. This relatively narrow approach to the reduction of normal tissue effects, especially those that can take months, if not years, to develop, seems to contradict our growing understanding of the progressive complexities of the microenvironmental disruption that follows the initial radiation injury. Given the analytical tools now at our disposal and the enormous benefits that may be reaped in terms of improving patient outcomes, as well as the potential for offering countermeasures to those affected by accidental or mass casualty exposures, it appears time to broaden our approaches to developing normal tissue countermeasures. We have no doubt that the contributors and readership of the International Journal of Radiation Biology will continue to contribute to this effort for the foreseeable future.
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Affiliation(s)
- Angela M. Groves
- Departments of Pediatrics and Neonatology, University of Rochester Medical Center, Rochester, USA
| | - Jacqueline P. Williams
- Departments of Environmental Medicine, University of Rochester Medical Center, Rochester, USA
- Departments of Radiation Oncology, University of Rochester Medical Center, Rochester, USA
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16
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Long W, Wang J, Yang J, Wu H, Wang J, Mu X, He H, Liu Q, Sun YM, Wang H, Zhang XD. Naturally-Derived PHA-L Protein Nanoparticle as a Radioprotector Through Activation of Toll-Like Receptor 5. J Biomed Nanotechnol 2019; 15:62-76. [PMID: 30480515 PMCID: PMC6300143 DOI: 10.1166/jbn.2019.2665] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
High energy ray in medical diagnosis and therapy can benefit to patients, but can also cause the significant damages to biomolecules such as DNA, as well as free radical generation, inevitably leading to numerous side effects. Small molecular radioprotectors provide an effective route to preserve the healthy tissue and whole body from ionizing radiation, but always have a short circulation time in body. Inorganic nanoparticles show major protection effect but their heavy metal components considerably jeopardize translational promise due to suboptimal biocompatibility. Herein, we report a novel protein nanoparticle that can overcome limitations of both small molecular and inorganic nanoparticle radioprotectors and can be used as a radioprotector with spontaneous biocompatibility, outstanding pharmacokinetics and improvement on survival rate under exposure to γ-ray irradiation. PHA-L protein nanoparticle serves to clear excessive reactive oxygen species in vivo, prevents radiation-induced hematopoietic and gastrointestinal damages and boosts the survival rate of irradiated mice to ∼70%. A detailed study of the mechanism shows PHA-L protein nanoparticle can target and activate the toll-like receptor 5 in vitro and in vivo, and thus protect irradiated cells by immune response. Importantly, the PHA-L protein nanoparticle can perform highly efficient clearance while eliciting negligible toxicological response.
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Affiliation(s)
- Wei Long
- Tianjin Key Laboratory of Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 238, Baidi Road, Tianjin 300192, China
| | - Junying Wang
- Department of Physics and Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, School of Sciences, Tianjin University, Tianjin 300350, China
| | - Jiang Yang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-sen University Cancer Center, Guangzhou 510060, China
| | - Hongying Wu
- Tianjin Key Laboratory of Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 238, Baidi Road, Tianjin 300192, China
| | - Jingya Wang
- Tianjin Key Laboratory of Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 238, Baidi Road, Tianjin 300192, China
| | - Xiaoyu Mu
- Department of Physics and Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, School of Sciences, Tianjin University, Tianjin 300350, China
| | - Hua He
- State Key Laboratory of Heavy Oil Processing and Center for Bioengineering and Biotechnology, China University of Petroleum (East China), Qingdao 266580, China
| | - Qiang Liu
- Tianjin Key Laboratory of Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 238, Baidi Road, Tianjin 300192, China
| | - Yuan-Ming Sun
- Tianjin Key Laboratory of Molecular Nuclear Medicine, Institute of Radiation Medicine, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 238, Baidi Road, Tianjin 300192, China
| | - Haichao Wang
- Laboratory of Emergency Medicine, North Shore University Hospital and The Feinstein Institute for Medical Research, Manhasset, New York 11030, USA
| | - Xiao-Dong Zhang
- Department of Physics and Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, School of Sciences, Tianjin University, Tianjin 300350, China
- Tianjin Collaborative Innovation Center of Chemical Science and Engineering, Tianjin 300072, China
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17
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Mortazavi SMJ. Comments on "Sesamol ameliorates radiation induced DNA damage in hematopoietic system of whole body γ-irradiated mice". Environ Mol Mutagen 2018; 59:170-171. [PMID: 29067715 DOI: 10.1002/em.22143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 09/11/2017] [Indexed: 06/07/2023]
Affiliation(s)
- S M J Mortazavi
- Diagnostic Imaging Center, Fox Chase Cancer Center, Philadelphia, Pennsylvania, 19111
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18
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Mollet M, Lafitte P, Morand B, Hoarau T, Piot P, Thomas AL, Fréchet M, Nicolaÿ JF. New nature-inspired urocanic acid mimic preventing DNA damages and immunosuppressive signalling induced by ultraviolet-B radiations. J Cosmet Sci 2017; 68:99-106. [PMID: 29465390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Affiliation(s)
- M Mollet
- Exsymol S.A.M., Monaco, Principality of Monaco
| | - P Lafitte
- Exsymol S.A.M., Monaco, Principality of Monaco
| | - B Morand
- Exsymol S.A.M., Monaco, Principality of Monaco
| | - T Hoarau
- Exsymol S.A.M., Monaco, Principality of Monaco
| | - P Piot
- Exsymol S.A.M., Monaco, Principality of Monaco
| | - A L Thomas
- Exsymol S.A.M., Monaco, Principality of Monaco
| | - M Fréchet
- Exsymol S.A.M., Monaco, Principality of Monaco
| | - J-F Nicolaÿ
- Exsymol S.A.M., Monaco, Principality of Monaco
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Kalita B, Ranjan R, Singh A, Yashavarddhan MH, Bajaj S, Gupta ML. A Combination of Podophyllotoxin and Rutin Attenuates Radiation Induced Gastrointestinal Injury by Negatively Regulating NF-κB/p53 Signaling in Lethally Irradiated Mice. PLoS One 2016; 11:e0168525. [PMID: 28036347 PMCID: PMC5201299 DOI: 10.1371/journal.pone.0168525] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Accepted: 12/03/2016] [Indexed: 12/15/2022] Open
Abstract
Development of an effective radio protector to minimise radiation-inflicted damages have largely failed owing to inherent toxicity of most of the agents examined so far. This study is centred towards delivering protection to lethally irradiated mice by pre-administration of a safe formulation G-003M (combination of podophyllotoxin and rutin) majorly through regulation of inflammatory and cell death pathways in mice. Single intramuscular dose of G-003M injected 60 min prior to 9 Gy exposure rescued 89% of whole body lethally irradiated C57BL/6J mice. Studies have revealed reduction in radiation induced reactive oxygen species (ROS), nitric oxide (NO) generation, prostaglandin E2 (PGE2) levels and intestinal apoptosis in G-003M pre-treated mice intestine. Restricted nuclear translocation of redox-sensitive Nuclear factor-κB (NF-κB) and subsequent downregulation of cyclo-oxygenase 2 (COX-2), inducible nitric oxide synthase (iNOS; EC 1.14.13.39) and tumor necrosis factor (TNF-α) levels demonstrated the anti-inflammatory effect that G-003M exerts. Support to early hematopoietic recovery was exhibited through G-003M mediated induction of granulocyte colony stimulating factor (G-CSF) and interleukin (IL-6) levels in lethally irradiated mice. Considerable attenuation in radiation induced morphological damage to the intestinal villi, crypts and mucosal layers was observed in G-003M pre-treated mice. Additionally, our formulation did not reduce the sensitivity of tumor tissue to radiation. Altogether, these results suggest that G-003M ameliorates the deleterious effects of radiation exposure by minimising ROS and NO generation and effectively regulating inflammatory and cell death pathways. Mechanism of protection elucidated in the current study demonstrates that G-003M can be used as a safe and effective radio protective agent in radiotherapy for human application.
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Affiliation(s)
- Bhargab Kalita
- Division of Radioprotective Drug Development and Research, Institute of Nuclear Medicine and Allied Sciences, Brig.S.K Mazumdar Marg, Delhi, INDIA
| | - Rajiv Ranjan
- Division of Radioprotective Drug Development and Research, Institute of Nuclear Medicine and Allied Sciences, Brig.S.K Mazumdar Marg, Delhi, INDIA
| | - Abhinav Singh
- Division of Radioprotective Drug Development and Research, Institute of Nuclear Medicine and Allied Sciences, Brig.S.K Mazumdar Marg, Delhi, INDIA
| | - M. H. Yashavarddhan
- Division of Radioprotective Drug Development and Research, Institute of Nuclear Medicine and Allied Sciences, Brig.S.K Mazumdar Marg, Delhi, INDIA
| | - Sania Bajaj
- Division of Radioprotective Drug Development and Research, Institute of Nuclear Medicine and Allied Sciences, Brig.S.K Mazumdar Marg, Delhi, INDIA
| | - Manju Lata Gupta
- Division of Radioprotective Drug Development and Research, Institute of Nuclear Medicine and Allied Sciences, Brig.S.K Mazumdar Marg, Delhi, INDIA
- * E-mail:
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20
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Dimri M, Joshi J, Shrivastava N, Ghosh S, Chakraborti R, Indracanti PK. Prilocaine hydrochloride protects zebrafish from lethal effects of ionizing radiation: role of hematopoietic cell expansion. Tokai J Exp Clin Med 2015; 40:8-15. [PMID: 25843444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Accepted: 12/16/2014] [Indexed: 06/04/2023]
Abstract
Drug repositioning is an approach of significant translatability, and the present study was undertaken to screen a collection of FDA approved small-molecule clinical compounds for identification of novel radioprotective agents. Screening of JHCCL (Johns Hopkins Clinical Compound Library), a collection of 1,400 FDA approved small molecules, lead to identification of prilocaine hydrochloride, a local anesthetic used widely during dental procedures, as a potential radioprotector. Prilocaine, at a concentration of 20 µM, protected zebrafish from radiation induced (20 Gy) pericardial edema (PE), microphthalmia and rendered 60 % survival advantage over radiation exposed controls. While 40 % survival advantage over radiation exposed controls was achieved with 10 µM prilocaine. Prilocaine, in a dose-dependent manner, scavenged, radiation-induced hydroxyl radicals and maximally (43 %) at the highest concentration (1 mM) tried in this study. However, prilocaine exerted a mild superoxide anion scavenging potential (around 5 %) at all the concentrations used within this study. Prilocaine, at 20 µM concentration, significantly increased erythropoiesis, a marker for HSC function, in caudal hematopoietic tissue (CHT) in wild type and anemic zebrafish embryos (1.48 and 0.85 folds respectively) when compared to untreated (1) and phenylhydrazine (PHZ) (0.41 fold) treated control groups respectively. These results suggest that prilocaine is a radioprotective agent and free radical scavenging and HSC expanding potential seems to be contributing towards its radioprotective action.
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Affiliation(s)
| | | | | | | | | | - Prem Kumar Indracanti
- Radiation Biosciences Division, Institute of Nuclear Medicine and Allied Sciences (INMAS), Defense Research and Development Organization (DRDO), Brig SK Majumdar Road, Timarpur Delhi-110054, India.
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Yao C, Sheng C, Liu D, Gao S, Jiang W, Yu H, Li J, Chen H, Wu J, Pan C, Chen S, Huang W. [Expression, purification of recombinant human cryptochrome I and its application in preparation of protective agent for radiotherapy]. Sheng Wu Gong Cheng Xue Bao 2015; 31:135-146. [PMID: 26021087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Radiotherapy is a treatment for cancer with undesired by-effects. In order to develop a new radiation protective agent that could reduce the by-effects, we tried to express and purify human cryptochrome 1 (hCRY1). The coding sequence of hCRY1 was inserted into prokaryotic expression plasmid pET28a(+), and this protein was purified from Escherichia coli BL21(DE3) after IPTG induction, ultrasonication, inclusion body dissolution, gradient dialysis, nickel column purification and ultrafiltration. The yield of hCRY1 in 1 L E. coli culture (LB medium) was about 10-15 mg. The radiation protective efficiency of hCRY1 was monitored by detecting X-ray-induced H2A.X foci in HaCaT cells. The results of immunofluorescence show that hCRY1 significantly reduces X-ray stimulated DNA damage response. The apoptosis of HaCaT cell was also detected, and the repression of H2A.X foci formation was not due to hCRY1's cytotoxity. All these data suggest a potential application of recombinant hCRY1 as a protective agent for radiotherapy.
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Bai J, Lu Y, Li PY, Liu CM, Wu HC, Wen R, Du SY. Development and in vitro evaluation of a transdermal hydrogel patch for ferulic acid. Pak J Pharm Sci 2014; 27:369-375. [PMID: 24577928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Current work aimed to develop and evaluate a transdermal delivery system of hydrogel patch for ferulic acid to treat skin damage induced by UV radiation. VISCOMATE(TM) NP700, dihydroxy aluminium aminoacetate, glycerine, tartaric acid were used in combination in different ratios to design the hydrogel patch. In vitro release rate was selected as an index to optimize the formulation. The formulated hydrogel patch was evaluated by several parameters like tacking strength, cohesive strength, peeling strength, residuals after peeling and drug content determination. The in vitro penetration was determined by Franz diffusion technology with hairless mouse skin as permeability media. Different kinetics models were employed to simulate the release and penetrate patterns of ferulic acid from patches in order to investigate the drug transport mechanism. The residual drugs in the patch and skin were determined after the penetration experiment. The optimized preparation was dihydroxy aluminium aminoacetate: NP700: glycerine: ferulic acid as a ratio of 0.02:0.4:1.5:1.25:0.25. The cumulative percentage of release was 60.4465±1.7679% for 24h, which results from a combination of diffusion effect and polymer erosion effect. For the barrier of stratum corneum, the cumulative penetrate rate was only 1.3156±0.3588% and the release mechanism turn out to be the effect of erosion of polymer surface. The residual drugs in the patch were 97.5949±1.4932%. The in vitro data revealed that it was easy for ferulic acid to release from the paste while difficult to permeate through the skin barrier, which resulted in most of drugs residued in the paste. Hence, further experiments will be necessary for finding the penetration enhancer in ferulic acid transdermal delivery.
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Affiliation(s)
- Jie Bai
- Department of Industrial Pharmacy, School of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing, China
| | - Yang Lu
- Department of Industrial Pharmacy, School of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing, China
| | - Peng-yue Li
- Department of Industrial Pharmacy, School of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing, China
| | - Cong-min Liu
- Department of Industrial Pharmacy, School of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing, China
| | - Hui-chao Wu
- Department of Industrial Pharmacy, School of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing, China
| | - Ran Wen
- Department of Industrial Pharmacy, School of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing, China
| | - Shou-ying Du
- Department of Industrial Pharmacy, School of Chinese Pharmacy, Beijing University of Chinese Medicine, Beijing, China
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Sundari J, Selvaraj R, Rajendra Prasad N, Elumalai R. Jatropha curcas leaf and bark fractions protect against ultraviolet radiation-B induced DNA damage in human peripheral blood lymphocytes. Environ Toxicol Pharmacol 2013; 36:875-882. [PMID: 23995553 DOI: 10.1016/j.etap.2013.08.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2012] [Revised: 02/04/2013] [Accepted: 08/01/2013] [Indexed: 06/02/2023]
Abstract
The present study is conducted to investigate the antioxidant potential of Jatropha curcas root bark extract (RB4 fraction) and leaf extract (L1 fraction), and to study their effects on UVB-radiation-induced DNA damage in cultured human blood lymphocytes. In this study, J. curcas showed strong antioxidant property in different free radical scavenging systems. Both the fractions effectively scavenged hydroxyl (OH), superoxide anion (O₂(·-)), 1,1-diphenyl-2-picrylhydrazyl (DPPH·) and 2,2-azino-bis-3-ethylbenzothiazoline-6-sulphonic acid radical cation (ABTS(·+)) in a concentration-dependent manner. The IC₅₀ (Inhibitory Concentration 50) values of J. curcas fractions were compared to standard ascorbic acid used in this study. The antioxidant potential of a compound was directly proportional to the photoprotective effect. In this study, human peripheral blood lymphocytes (HPBL) were exposed to UVB-radiation and there was an increase in comet attributes (% tail DNA, tail length, tail movement and Olive tail moment). Jatropha curcas RB4 fraction and L1 fraction treatment before UVB-irradiation significantly decreased the % tail DNA, tail length, tail moment and Olive tail moment in irradiated HPBL. These results suggested that J. curcas exhibited strong antioxidant property and RB4 and L1 fractions protected UVB-radiation-induced DNA damage in HPBL.
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Affiliation(s)
- J Sundari
- Department of Botany, Faculty of Science, Annamalai University, Annamalainagar 608 002, Tamil Nadu, India
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Liakou AI, Theodorakis MJ, Melnik BC, Pappas A, Zouboulis CC. Nutritional clinical studies in dermatology. J Drugs Dermatol 2013; 12:1104-1109. [PMID: 24085045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND & AIMS Nutrition has long been associated with skin health, beauty, integrity and aging through multiple pathways and cofactors implicated in skin biology. The onset and clinical course of various common skin diseases, especially acne, psoriasis, atopic dermatitis, and hair loss, have been suggested to be critically affected by nutrition patterns and habits. The relationship between acne and diet, predominantly the role of high glycemic load diets and dairy consumption have recently gained increased interest. Abnormal nutritional conditions such as obesity or malnutrition often manifest themselves by specific cutaneous features and altered skin function. Skin photoprotection, rendered by various nutrients, is well documented and appropriate nutritional supplementation has been shown to exert beneficial effects upon impaired skin integrity, restore its appearance and promote skin health. It is our intention to provide a comprehensive review of the most recent information on the role of nutrition for common skin diseases and regulation of skin biology. METHODS Nutritional clinical studies in dermatology have been reviewed using the MedLine literature source and the terms "diet" or "nutrition" and "skin". RESULTS & CONCLUSIONS The data on the relationship between nutrition and skin are until now controversial and much more work is needed to be done to clarify possible etiological correlations.
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Abstract
The tripeptide glutathione (GSH) is the most abundant intracellular nonprotein thiol, and it is involved in many cellular functions including redox-homeostatic buffering. Cellular radiosensitivity has been shown to be inversely correlated to the endogenous level of GSH. On the other hand, controversy is raised with respect to its role in the field of radioprotection since GSH failed to provide consistent protection in several cases. Reports have been published that DNA repair in cells has a dependence on GSH. Subsequently, S-glutathionylation (forming mixed disulfides with the protein-sulfhydryl groups), a potent mechanism for posttranslational regulation of a variety of regulatory and metabolic proteins when there is a change in the celluar redox status (lower GSH/GSSG ratio), has received increased attention over the last decade. GSH, as a single agent, is found to affect DNA damage and repair, redox regulation and multiple cell signaling pathways. Thus, seemingly, GSH does not only act as a radioprotector against DNA damage induced by X-rays through glutathionylation, it may also act as a modulator of the DNA-repair activity. Judging by the number of publications within the last six years, it is obvious that the field of protein glutathionylation impinges on many aspects of biology, from regulation of protein function to roles of cell cycle and apoptosis. Aberrant protein glutathionylation and its association with cancer and other diseases is an area of increasing interest.
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Affiliation(s)
- Anupam Chatterjee
- Department of Biotechnology & Bioinformatics, North-Eastern Hill University, Shillong 793022, India.
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Hosokawa Y, Okumura K, Terashima S, Sakakura Y. Radiation protective effect of hypoxia-inducible factor-1α (HIF-1α) on human oral squamous cell carcinoma cell lines. Radiat Prot Dosimetry 2012; 152:159-163. [PMID: 22927657 DOI: 10.1093/rpd/ncs215] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We examined the effects of 5-Gy radiation on the expression of hypoxia-inducible factor-1α (HIF-1α) and the radiosensitivity of five human oral squamous cell carcinoma (OSCC) cell lines (SAS, Ca9-22, TT, BSC-OF and IS-FOM). In all of the cell lines, HIF-1α was expressed in mRNA, and radiation had no influence on gene transcription. The number of apoptotic cells increased 72 h after irradiation in cell lines SAS, Ca9-22 and TT cells, indicating low transcriptional levels of HIF-1α, and the levels of non-cleaved caspase-3, an executioner of apoptosis, and non-cleaved poly (adenosine diphosphate-ribose) polymerase (PARP), a marker of DNA damage early in apoptosis, decreased simultaneously. Conversely, radiation failed to induce apoptosis or to decrease expression of non-cleaved caspase-3 and PARP in cell lines BSC-OF and IS-FOM cells that expressed high levels of HIF-1α. BSC-OF and IS-FOM cells exhibited high migratory capacity. When CoCl(2) was present in the medium, HIF-1α expression increased along with the survival of Ca9-22 cells after radiation exposure. These results suggest that OSCC cells expressing high levels of HIF-1α are resistant to radiation. HIF-1α can be used to control the short-term radiosensitivity of cells.
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Affiliation(s)
- Y Hosokawa
- Division of Medical Life Sciences, Hirosaki University, 66-1 Hon-cho, Hirosaki, Aomori 0.6-8564, Japan.
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Epperly MW, Bahary N, Quader M, Dewald V, Greenberger JS. The zebrafish--Danio rerio--is a useful model for measuring the effects of small-molecule mitigators of late effects of ionizing irradiation. In Vivo 2012; 26:889-897. [PMID: 23160669 PMCID: PMC3775014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
BACKGROUND/AIM Use of zebrafish models may decrease the cost of screening new irradiation protectors and mitigators. MATERIALS AND METHODS Zebrafish (Danio rerio) models were tested for screening water-soluble radiation protectors and mitigators. Irradiation of embryos and monitoring survival, and measuring fibrosis of the caudal musculature of adults allowed for testing of acute and late effects, respectively. RESULTS Incubation of zebrafish embryos either before or after irradiation in ethyl pyruvate (1 mM) increased survival. Irradiation of adults to 15 to 75 Gy, delivered in single-fraction at 13 Gy/min, showed dose-dependent fibrosis at 30 days, quantitated as physiological decrease in swimming tail movement, and histopathological detection of collagen deposition in the dorsal musculature. Continuous administration of small-molecule radioprotector drugs in the water after irradiation reduced both acute and chronic injuries. CONCLUSION The zebrafish is cost-effective for screening new radiation countermeasures.
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Affiliation(s)
- Michael W Epperly
- Department of Radiation Oncology, University of Pittsburgh Cancer Institute, Pittsburgh, PA 15232, USA
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Uzair B, Tabassum S, Rasheed M, Rehman SF. Exploring marine cyanobacteria for lead compounds of pharmaceutical importance. ScientificWorldJournal 2012; 2012:179782. [PMID: 22545008 PMCID: PMC3324129 DOI: 10.1100/2012/179782] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2011] [Accepted: 11/20/2011] [Indexed: 11/28/2022] Open
Abstract
The Ocean, which is called the "mother of origin of life," is also the source of structurally unique natural products that are mainly accumulated in living organisms. Cyanobacteria are photosynthetic prokaryotes used as food by humans. They are excellent source of vitamins and proteins vital for life. Several of these compounds show pharmacological activities and are helpful for the invention and discovery of bioactive compounds, primarily for deadly diseases like cancer, acquired immunodeficiency syndrome (AIDS), arthritis, and so forth, while other compounds have been developed as analgesics or to treat inflammation, and so forth. They produce a large variety of bioactive compounds, including substances with anticancer and antiviral activity, UV protectants, specific inhibitors of enzymes, and potent hepatotoxins and neurotoxins. Many cyanobacteria produce compounds with potent biological activities. This paper aims to showcase the structural diversity of marine cyanobacterial secondary metabolites with a comprehensive coverage of alkaloids and other applications of cyanobacteria.
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Affiliation(s)
- Bushra Uzair
- Department of Bioinformatics and Biotechnology, International Islamic University Islamabad, Sector H-10, 44000 Islamabad, Pakistan.
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Kolosov AV, Pugachev VG, Anan'ko GG, Totmenina OD, Kliachko NL, Levashev PA, Kosogova TA. [Design of the composition of baculovirus agents]. Vopr Virusol 2011; 56:40-44. [PMID: 22171478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The ability of 30 compounds to protect infection bacteria and baculoviruses from the damaging effect of ultraviolet (UV) irradiation was investigated. For this B. thuringiensis var. israelensis spores and gypsy moth (Lymantria dispar L.) nuclear polyhedrosis virus were mixed with different components and exposed to UV irradiation at 0.25 WI cm2 for 60 min. Then spore viability and viral pathogenicity were studied in third instar gypsy moth larvae. The composition comprising sodium alginate, albumin, and ascorbic acid ensured the most effective protection of the viruses and bacteria. These components were shown to provide protection from exposure to UV irradiation even at a low concentration. Their incorporation into biopesticides will assist in enhancing the efficiency of their use.
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Saini DK, Saini MR. Evaluation of radioprotective efficacy and possible mechanism of action of Aloe gel. Environ Toxicol Pharmacol 2011; 31:427-35. [PMID: 21787713 DOI: 10.1016/j.etap.2011.02.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2010] [Revised: 01/20/2011] [Accepted: 02/09/2011] [Indexed: 05/12/2023]
Abstract
The present study was undertaken to determine the optimum effective dose, dose reduction factor (DRF) and possible mechanism of action of Aloe gel. Three different doses of gel (250, 500 and 750 mg/kg body weight) were tested against 8 Gy induced damage in Swiss albino mice. A dose of 750 mg/kg body weight of Aloe was found the most effective while, 250 mg/kg body weight was the least effective in providing protection, as observed in the form of higher concentrations of blood GSH and vitamin C and lower level of serum LPO than irradiated animals at 1h post irradiation and higher percent of survivors up to day 30 post irradiation. Treatment of mice with Aloe before irradiation with different doses of gamma radiation (6-12 Gy) delayed the onset and reduced the severity of signs of radiation sickness. The LD(50/30) was calculated as 6.77 and 10 Gy for untreated irradiated and Aloe treated irradiated animals, respectively and its dose reduction factor was also calculated as 1.47. Aloe gel scavenged the free radicals, DPPH•, ABTS(+•) and NO in a concentration dependent manner in vitro and therefore, scavenging of free radicals seems to be its important mechanism of action.
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Affiliation(s)
- Dinesh Kumar Saini
- Radiation and Cancer Biology Laboratory, Department of Zoology, University of Rajasthan, Jaipur 302004, Rajasthan, India
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Abstract
Abstract
A thiolsulphonate, 2-aminoethyl 2-aminoethanethiolsulphonate (also known as cystamine disulphoxide) affords significant protection to the micro-organism Serratia marcescens against the lethal effects of X-rays. The thiolsulphonate breaks down extensively at pH7, but the degree of protection given by it is much greater than can be accounted for by the action of decomposition products and is considered to be characteristic of the compound itself.
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Caes BR, Raines RT. Conversion of fructose into 5-(hydroxymethyl)furfural in sulfolane. ChemSusChem 2011; 4:353-356. [PMID: 21394925 DOI: 10.1002/cssc.201000397] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Revised: 12/26/2010] [Indexed: 05/30/2023]
Affiliation(s)
- Benjamin R Caes
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA
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Pant HR, Bajgai MP, Nam KT, Seo YA, Pandeya DR, Hong ST, Kim HY. Electrospun nylon-6 spider-net like nanofiber mat containing TiO(2) nanoparticles: a multifunctional nanocomposite textile material. J Hazard Mater 2011; 185:124-30. [PMID: 20875702 DOI: 10.1016/j.jhazmat.2010.09.006] [Citation(s) in RCA: 116] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2010] [Revised: 09/02/2010] [Accepted: 09/02/2010] [Indexed: 05/24/2023]
Abstract
In this study, electrospun nylon-6 spider-net like nanofiber mats containing TiO(2) nanoparticles (TiO(2) NPs) were successfully prepared. The nanofiber mats containing TiO(2) NPs were characterized by SEM, FE-SEM, TEM, XRD, TGA and EDX analyses. The results revealed that fibers in two distinct sizes (nano and subnano scale) were obtained with the addition of a small amount of TiO(2) NPs. In low TiO(2) content nanocomposite mats, these nanofiber weaves were found uniformly loaded with TiO(2) NPs on their wall. The presence of a small amount of TiO(2) NPs in nylon-6 solution was found to improve the hydrophilicity (antifouling effect), mechanical strength, antimicrobial and UV protecting ability of electrospun mats. The resultant nylon-6/TiO(2) antimicrobial spider-net like composite mat with antifouling effect may be a potential candidate for future water filter applications, and its improved mechanical strength and UV blocking ability will also make it a potential candidate for protective clothing.
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Affiliation(s)
- Hem Raj Pant
- Department of Bionanosystem Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea
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Abstract
Radiation is used in the treatment of a broad range of malignancies. Exposure of normal tissue to radiation may result in both acute and chronic toxicities that can result in an inability to deliver the intended therapy, a range of symptoms, and a decrease in quality of life. Radioprotectors are compounds that are designed to reduce the damage in normal tissues caused by radiation. These compounds are often antioxidants and must be present before or at the time of radiation for effectiveness. Other agents, termed mitigators, may be used to minimize toxicity even after radiation has been delivered. Herein, we review agents in clinical use or in development as radioprotectors and mitigators of radiation-induced normal tissue injury. Few agents are approved for clinical use, but many new compounds show promising results in preclinical testing.
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Affiliation(s)
- Deborah Citrin
- Radiation Oncology Branch, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, USA.
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Goel HC, Gupta D, Gupta S, Garg AP, Bala M. Protection of mitochondrial system by Hippophae rhamnoides L. against radiation-induced oxidative damage in mice. J Pharm Pharmacol 2010; 57:135-43. [PMID: 15639001 DOI: 10.1211/0022357055218] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Abstract
The whole extract of the fresh berries of Hippophae rhamnoides L. (RH−3), which has been reported to provide protection to whole mice, various tissues, cells and cell organelles against lethal irradiation, was further investigated for its effects on mitochondria isolated from mouse liver. Superoxide anion, reduced (GSH) and oxidized glutathione (GSSG) levels, NADH-ubiquinone oxidoreductase (complex I), NADH-cytochrome c oxidoreductase (complex I/II), succinate-cytochrome c oxidoreductase (complex II/III), mitochondrial membrane potential (MMP), lipid peroxidation (LPx) and protein oxidation (PO) were determined for RH-3-mediated radioprotective manifestation. Pre-irradiation treatment of mice with RH-3 (30 mg kg−1, i.p.; single dose; −30 min) significantly inhibited the radiation-induced increase in superoxide anions, GSSG, thiobarbituric acid reactive substances (TBARS), complex I, complex I/III activity and MMP maximally at 4 h (P < 0.05). This treatment inhibited the oxidation of proteins (P < 0.05) at all the time periods studied here. This study suggests that pre-irradiation treatment of mice with RH-3 protects the functional integrity of mitochondria from radiation-induced oxidative stress.
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Affiliation(s)
- Harish Chandra Goel
- Radiation Biology Division, Institute of Nuclear Medicine and Allied Sciences, Brig. S. K. Mazumdar Road, Delhi-110 054, India.
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Jeong YM, Lee JE, Kim SY, Yun HY, Baek KJ, Kwon NS, Kim DS. Enhanced effects of citrate on UVB-induced apoptosis of B16 melanoma cells. Pharmazie 2009; 64:829-833. [PMID: 20095142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Ultraviolet (UV) radiation is a major risk factor for the development of melanoma. Recent studies have reported that the intake of citrate-containing juices may reduce the risk of cancer. Thus, we investigated the effects of citrate on UVB-irradiated B16 murine melanoma cells. B16 cells had more evident apoptotic features with the combination of citrate/UVB than by citrate or UVB alone; cell death of HaCaT human keratinocytes was not observed with citrate/UVB. Western blot analysis demonstrated that citrate/UVB led to phosphorylation of the stress signaling proteins, such as c-Jun N-terminal kinase (JNK) and p38 mitogen-activated protein kinase (MAPK). Furthermore, citrate/UVB caused activation of caspase-9/-3 as well as cleavage of poly(ADP-ribose) polymerase (PARP). Correspondingly, cell cycle analysis showed that citrate/UVB clearly increased the sub-G0/G1 phase, which indicated apoptotic cell death of B16 cells. Therefore, our study has demonstrated that sub-lethal doses of citrate enhanced the apoptotic cell death of melanoma cells under UVB irradiation. From these results, we suggest that citrate might reduce the risk of developing melanoma induced by UVB.
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Affiliation(s)
- Yun-Mi Jeong
- Department of Biochemistry, College of Medicine, Chung-Ang University, Seoul, Korea
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Abstract
BACKGROUND The aim of this study was to measure ultraviolet radiation (UVR) exposures of lifeguards in pool settings and evaluate their personal UVR protective practices. METHODS Lifeguards (n = 168) wore UVR sensitive polysulfone (PS) film badges in wrist bracelets on 2 days and completed a survey and diary covering sun protection use. Analyses were used to describe sun exposure and sun protection practices, to compare UVR exposure across locations, and to compare findings with recommended threshold limits for occupational exposure. RESULTS The measured UVR exposures varied with location, ranging from high median UVR exposures of 6.2 standard erythemal doses (SEDs) to the lowest median of 1.7 SEDs. More than 74% of the lifeguards' PS badges showed UVR above recommended threshold limits for occupational exposure. Thirty-nine percent received more than four times the limit and 65% of cases were sufficient to induce sunburn. The most common protective behaviors were wearing sunglasses and using sunscreen, but sun protection was often inadequate. CONCLUSIONS At-risk individuals were exposed to high levels of UVR in excess of occupational limits and though appropriate types of sun protection were used, it was not used consistently and more than 50% of lifeguards reported being sunburnt at least twice during the previous year.
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Affiliation(s)
- Peter Gies
- Australian Radiation Protection and Nuclear Safety Agency, Yallambie, Victoria, Australia.
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SMITH H, BATES TH, DYMOND B, CHAPMAN IV. The Effect of DTPA Treatment after Administration to Rats of239Pu (VI) in Nitric Acid. ACTA ACUST UNITED AC 2009; 8:191-3. [PMID: 14195526 DOI: 10.1080/09553006414550201] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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STUYVAERT J, LIEBECQ C, BACQ ZM. Radio-sensibilité Comparée de Deux Souches deBacillus SubtilisDont L'une Dépourvue D'aconitase. ACTA ACUST UNITED AC 2009; 8:513-7. [PMID: 14278126 DOI: 10.1080/09553006414550641] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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STUYVAERT J, BACQ ZM. Etude de Diverses Substances Pouvant Modifier la Radio-sensibilité d'EscherichiaColi et deBacillus Subtilis; Sensibilisation par la Sulfone de L'ypérite. ACTA ACUST UNITED AC 2009; 8:519-22. [PMID: 14278127 DOI: 10.1080/09553006414550651] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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BACQ ZM, BEAUMARIAGE ML, LIEBECQ HUTTER S. Relation Entre la Radioprotection et L'hypothermie Induite par Certaines Substances Chimiques. ACTA ACUST UNITED AC 2009; 9:175-8. [PMID: 14328337 DOI: 10.1080/09553006514550221] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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