Effects of radioactive 125I on apoptosis of HGC-27 gastric cancer cells

Yang,Yong; Chen,Aifei; Ma,Jun; Wu,Aiping; Xu,Fazhen

doi:10.3892/ol.2019.10832

Effects of radioactive 125I on apoptosis of HGC-27 gastric cancer cells

Authors:
- Yong Yang
- Aifei Chen
- Jun Ma
- Aiping Wu
- Fazhen Xu
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Affiliations: Department of Oncology, Huai'an TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Huai'an, Jiangsu 223001, P.R. China, Department of Gastroenterology, Lianshui County People's Hospital, Huai'an, Jiangsu 223400, P.R. China
Published online on: September 9, 2019 https://doi.org/10.3892/ol.2019.10832
Pages: 4916-4922
Copyright: © Yang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Effects of radioactive 125I particles at different doses on apoptosis of HGC-27 gastric cancer cells were investigated. HGC-27 gastric cancer cell suspension was used to establish a tumor-bearing mouse model. The model was reared for approximately 3 weeks and then divided into the control group (implanted with blank particles), the low dose group (implanted with 1.48x10-7 Bq 125I particles), the medium dose group (implanted with 2.22x10-7 Bq 125I particles) and the high dose group (implanted with 2.96x10-7 Bq 125I particles) (n=15 per group). Six nude mice were randomly sacrificed to collect the tumor tissue and measure tumor volume and mass. TUNEL (TdT-mediated dUTP nick-end labeling) was used for detecting apoptosis of tumor cells, and reverse transcription-quantitative polymerase chain reaction (RT-qPCR) for detecting the relative expression of Bax, caspase-3 and caspase-8. On the 28th day after implantation, the apoptotic rate in the low, medium and high dose groups was significantly higher than that in the control group, which in the medium and high dose groups was significantly lower than that in the low dose group (P<0.05). On the 28th day after implantation, the relative expression of Bax, caspase-3 and caspase-8 mRNA in the control group was significantly lower than that in the low, medium and high dose groups (P<0.05), which in the low dose group was significantly higher than that in the medium and high dose groups (P<0.05). 125I particles can inhibit the growth of HGC-27 gastric cancer cell transplants and promote the expression of Bax, caspase-3 and caspase-8 mRNA in the tumor tissue. Low-dose 125I particles are significantly more effective than medium- or high-dose 125I particles.

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