Modulation of radiation-induced base excision repair pathway gene expression by melatonin
Objective: Approximately 70% of all cancer patients receive radiotherapy. Although radiotherapy is effective in killing cancer cells, it has adverse effects on normal cells as well. Melatonin (MLT) as a potent antioxidant and anti-inflammatory agent has been proposed to stimulate DNA repair capacity...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wolters Kluwer Medknow Publications
2017-01-01
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| Series: | Journal of Medical Physics |
| Subjects: | |
| Online Access: | http://www.jmp.org.in/article.asp?issn=0971-6203;year=2017;volume=42;issue=4;spage=245;epage=250;aulast=Rezapoor |
| _version_ | 1818836607632932864 |
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| author | Saeed Rezapoor Alireza Shirazi Sakineh Abbasi Javad Tavakkoly Bazzaz Pantea Izadi Hamed Rezaeejam Majid Valizadeh Farid Soleimani-Mohammadi Masoud Najafi |
| author_facet | Saeed Rezapoor Alireza Shirazi Sakineh Abbasi Javad Tavakkoly Bazzaz Pantea Izadi Hamed Rezaeejam Majid Valizadeh Farid Soleimani-Mohammadi Masoud Najafi |
| author_sort | Saeed Rezapoor |
| collection | DOAJ |
| description | Objective: Approximately 70% of all cancer patients receive radiotherapy. Although radiotherapy is effective in killing cancer cells, it has adverse effects on normal cells as well. Melatonin (MLT) as a potent antioxidant and anti-inflammatory agent has been proposed to stimulate DNA repair capacity. We investigated the capability of MLT in the modification of radiation-induced DNA damage in rat peripheral blood cells. Materials and Methods: In this experimental study, male rats (n = 162) were divided into 27 groups (n = 6 in each group) including: irradiation only, vehicle only, vehicle with irradiation, 100 mg/kg MLT alone, 100 mg/kg MLT plus irradiation in 3 different time points, and control. Subsequently, they were irradiated with a single whole-body X-ray radiation dose of 2 and 8 Gy at a dose rate of 200 MU/min. Rats were given an intraperitoneal injection of MLT or the same volume of vehicle alone 1 h prior to irradiation. Blood samples were also taken 8, 24, and 48 h postirradiation, in order to measure the 8-oxoguanine glycosylase1 (Ogg1), Apex1, and Xrcc1 expression using quantitative real-time-polymerase chain reaction. Results: Exposing to the ionizing radiation resulted in downregulation of Ogg1, Apex1, and Xrcc1 gene expression. The most obvious suppression was observed in 8 h after exposure. Pretreatments with MLT were able to upregulate these genes when compared to the irradiation-only and vehicle plus irradiation groups (P < 0.05) in all time points. Conclusion: Our results suggested that MLT in mentioned dose may result in modulation of Ogg1, Apex1, and Xrcc1 gene expression in peripheral blood cells to reduce X-ray irradiation-induced DNA damage. Therefore, administration of MLT may increase the normal tissue tolerance to radiation through enhancing the cell DNA repair capacity. We believed that MLT could play a radiation toxicity reduction role in patients who have undergone radiation treatment as a part of cancer radiotherapy. |
| first_indexed | 2024-12-19T03:09:18Z |
| format | Article |
| id | doaj.art-03d734c5d82f4a2590998e4242417825 |
| institution | Directory Open Access Journal |
| issn | 0971-6203 1998-3913 |
| language | English |
| last_indexed | 2024-12-19T03:09:18Z |
| publishDate | 2017-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | Journal of Medical Physics |
| spelling | doaj.art-03d734c5d82f4a2590998e42424178252022-12-21T20:38:02ZengWolters Kluwer Medknow PublicationsJournal of Medical Physics0971-62031998-39132017-01-0142424525010.4103/jmp.JMP_9_17Modulation of radiation-induced base excision repair pathway gene expression by melatoninSaeed RezapoorAlireza ShiraziSakineh AbbasiJavad Tavakkoly BazzazPantea IzadiHamed RezaeejamMajid ValizadehFarid Soleimani-MohammadiMasoud NajafiObjective: Approximately 70% of all cancer patients receive radiotherapy. Although radiotherapy is effective in killing cancer cells, it has adverse effects on normal cells as well. Melatonin (MLT) as a potent antioxidant and anti-inflammatory agent has been proposed to stimulate DNA repair capacity. We investigated the capability of MLT in the modification of radiation-induced DNA damage in rat peripheral blood cells. Materials and Methods: In this experimental study, male rats (n = 162) were divided into 27 groups (n = 6 in each group) including: irradiation only, vehicle only, vehicle with irradiation, 100 mg/kg MLT alone, 100 mg/kg MLT plus irradiation in 3 different time points, and control. Subsequently, they were irradiated with a single whole-body X-ray radiation dose of 2 and 8 Gy at a dose rate of 200 MU/min. Rats were given an intraperitoneal injection of MLT or the same volume of vehicle alone 1 h prior to irradiation. Blood samples were also taken 8, 24, and 48 h postirradiation, in order to measure the 8-oxoguanine glycosylase1 (Ogg1), Apex1, and Xrcc1 expression using quantitative real-time-polymerase chain reaction. Results: Exposing to the ionizing radiation resulted in downregulation of Ogg1, Apex1, and Xrcc1 gene expression. The most obvious suppression was observed in 8 h after exposure. Pretreatments with MLT were able to upregulate these genes when compared to the irradiation-only and vehicle plus irradiation groups (P < 0.05) in all time points. Conclusion: Our results suggested that MLT in mentioned dose may result in modulation of Ogg1, Apex1, and Xrcc1 gene expression in peripheral blood cells to reduce X-ray irradiation-induced DNA damage. Therefore, administration of MLT may increase the normal tissue tolerance to radiation through enhancing the cell DNA repair capacity. We believed that MLT could play a radiation toxicity reduction role in patients who have undergone radiation treatment as a part of cancer radiotherapy.http://www.jmp.org.in/article.asp?issn=0971-6203;year=2017;volume=42;issue=4;spage=245;epage=250;aulast=RezapoorBase excision repairgene expressionmelatoninradiationreal-time-polymerase chain reaction |
| spellingShingle | Saeed Rezapoor Alireza Shirazi Sakineh Abbasi Javad Tavakkoly Bazzaz Pantea Izadi Hamed Rezaeejam Majid Valizadeh Farid Soleimani-Mohammadi Masoud Najafi Modulation of radiation-induced base excision repair pathway gene expression by melatonin Journal of Medical Physics Base excision repair gene expression melatonin radiation real-time-polymerase chain reaction |
| title | Modulation of radiation-induced base excision repair pathway gene expression by melatonin |
| title_full | Modulation of radiation-induced base excision repair pathway gene expression by melatonin |
| title_fullStr | Modulation of radiation-induced base excision repair pathway gene expression by melatonin |
| title_full_unstemmed | Modulation of radiation-induced base excision repair pathway gene expression by melatonin |
| title_short | Modulation of radiation-induced base excision repair pathway gene expression by melatonin |
| title_sort | modulation of radiation induced base excision repair pathway gene expression by melatonin |
| topic | Base excision repair gene expression melatonin radiation real-time-polymerase chain reaction |
| url | http://www.jmp.org.in/article.asp?issn=0971-6203;year=2017;volume=42;issue=4;spage=245;epage=250;aulast=Rezapoor |
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