Several research methods including sister chromatid exchange, chromosomal aberration and the micronu- cleus assay are normally used for investigating genetic damage. However, these methods are economically costly, time-consuming and require proliferating cells. Therefore, the use of single cell gel electrophore- sis (SCGE) or/and the comet assay for genotoxicity studies have greatly increased during the past few decades14−16).
The comet assay (CA) was first introduced by Ostling and Johanson (1984)17) as a technique to determine DNA single-strand breaks that caused relax- ation of DNA supercoils. This technique was further modified by Singh et al. (1988)18). The CA or SCGE is a precise, simple and fast test that has been exten- sively used to calculate both in-vitro DNA damage and repair following exposure to a variety of geno- toxic agents and even for human biomonitoring19,20). Different possible modifications of the comet assay have helped in the detection of single strand breaks (SSBs), double-strand breaks (DSBs), alkali-labile sites, incomplete excision repair sites, inter-strand cross linkages and cell death or apoptosis21).
Considering the hazardous effects of X-rays and lack of awareness among radiation personnel, this study was conducted to assess the level of DNA
damages in local radiology technicians using the CA technique.
Several research methods including sister chromatid exchange, chromosomal aberration and the micronu- cleus assay are normally used for investigating genetic damage. However, these methods are economically costly, time-consuming and require proliferating cells. Therefore, the use of single cell gel electrophore- sis (SCGE) or/and the comet assay for genotoxicity studies have greatly increased during the past few decades14−16).The comet assay (CA) was first introduced by Ostling and Johanson (1984)17) as a technique to determine DNA single-strand breaks that caused relax- ation of DNA supercoils. This technique was further modified by Singh et al. (1988)18). The CA or SCGE is a precise, simple and fast test that has been exten- sively used to calculate both in-vitro DNA damage and repair following exposure to a variety of geno- toxic agents and even for human biomonitoring19,20). Different possible modifications of the comet assay have helped in the detection of single strand breaks (SSBs), double-strand breaks (DSBs), alkali-labile sites, incomplete excision repair sites, inter-strand cross linkages and cell death or apoptosis21).Considering the hazardous effects of X-rays and lack of awareness among radiation personnel, this study was conducted to assess the level of DNAdamages in local radiology technicians using the CA technique.
การแปล กรุณารอสักครู่..
