A phenomenological model for the dynamics of cell cycle in responding to X-rays

来源 :中华放射医学与防护杂志 | 被引量 : 0次 | 上传用户:lhtskl
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Objective

To establish a model to predict the cell-cycle process in response to ionizing radiation.

Methods

Human choroidal malignant melanoma 92-1 cells were used and the cell cycle distribution of cells was analyzed in 0-96 h after exposure to X-rays. A phenomenological model was constructed based on biological knowledge to describe the cell cycle dynamics in experiments.

Results

In the present study, a phenomenological model was constructed to describe the cellcycle dynamics of synchronized 92-1 cells in responding to various doses of ionizing radiation. The simulation results obtained with the model were consistent with the experimental data, demonstrating that the model had a good expansibility and could be used to predict the dynamics of cell cycle in responding to ionizing radiation. Further theoretical modeling of the cellcycle dynamics was made and the results were consistent with the simulation.

Conclusions

A phenomenological model was constructed which could be used to describe the dynamics of cell cycle of cells exposed to ionizing radiation and was supported by the experimental data. Because this model is easy to run by the written code, it has a good expansibility for studying the behaviors of cell populations under various conditions.

其他文献
ObjectiveTo study the characteristics of cell engraftment in mice at a lower dose under nonlethal radiated condition.MethodsA syngeneic C57BL/6 mouse model, transplanted with 1×107 bone marrow cells a
全身化疗和局部治疗是目前小细胞肺癌(SCLC)的标准治疗方法.局限期SCLC化疗及胸部放疗后完全缓解的患者,给予脑预防照射(PCI)以进一步减少颅内复发和提高总生存率[1].目前广泛期SCLC化疗有效后是否需行胸部放疗和PCI,尚无定论.现就吉林省肿瘤医院60例广泛期SCLC患者经化疗有效后合并放疗与同期单纯化疗进行回顾性分析,比较结果报道如下。
期刊
胸部恶性肿瘤放疗过程中,心脏不可避免受到一定剂量的照射,近年来的研究提示心脏的放射性损伤不容忽视[1-2]。随着放射治疗技术的不断发展和临床疗效的提高,一些肿瘤患者获得长期生存,放射性心脏损伤问题逐渐突出,对患者的长期生存率及生活质量有一定影响。本研究通过分析心电图、心肌酶谱、心肌肌钙蛋白I、心功能状况的改变,以期为指导临床预测和评价放射性心脏损伤提供一定参考。
目的 探讨氯喹对食管癌TE-1细胞系的放射增敏作用及其主要机制.方法 采用MTT法检测不同浓度氯喹对TE-1细胞的生长抑制作用.分别用单纯照射或照射前联合氯喹、照射后联合氯喹作用于TE-1细胞,作用6h后用Western blot测定自噬相关蛋白LC3和Beclin1的表达,用Lyso-Tracker Red DND-99/Hochest 33258进行荧光染色,并用荧光显微镜观察细胞内酸性囊泡(
目的探索用荧光原位杂交(FISH)技术分析大剂量照射后Calyculin A(CA)诱导的早熟凝集染色体的可行性。方法采用X射线照射离体外周血,吸收剂量为0、1、5、10、15和20 Gy。RPMI 1640培养基培养,CA诱导染色体早熟凝集,1、4号全染色体探针荧光原位杂交,荧光显微镜下观察,计数畸变阳性细胞数及两条染色体断片数,拟合剂量效应曲线。结果以阳性细胞作为观察对象,剂量范围在0~15
ObjectiveTo study the nuclear protein association of high-mobility group box-1(HMGB1) and histone deacetylase 1(HDAC1), and the effect of interaction on radiosensitivity in human breast cancer cells.M
现阶段Ⅰ ~ Ⅱ期早期乳腺癌保乳术后的标准放疗方式为全乳腺常规分割照射25次后局部瘤床电子线推量照射5次[1].据报道常规分割放疗的局部控制率可达90%~ 95%,而总的治疗时间为6~7周.放疗在提高早期乳腺癌的局部控制率中有重要作用,但仍有大约15% ~ 20%的早期乳腺癌患者未遵医嘱行保乳术后放疗,其中的一个主要的原因就是放疗时间长,患者的依从性较差.如果能明显地缩短放疗时间,必将大大增加患者
期刊
期刊
目的对我国核医学诊断工作场所辐射防护现状进行调查。方法2013年2–12月期间,在东北、华中和华北地区分别选择1家三甲医院,用γ剂量率仪巡测核医学诊断制药、淋洗、分装、注射、扫描过程中工作场所周围剂量当量率,光致发光剂量计测量放射工作人员个人有效剂量和当量剂量。结果在放射性药物分装、注射和受检者摆位等操作环节中周围剂量当量率较高,分装时最高达1.92 mSv/h,注射时距针管5 cm处剂量率最高达
目的探讨长期连续天然放射性照射对人群氧化损伤及抗氧化水平的影响。方法选择广东天然放射性高本底辐射地区(HBRA)48名男性居民为研究对象,选择恩平市某镇(CA)相匹配的48名男性居民为对照人群。采集2组人群外周静脉血并分离血浆,采用酶联免疫吸附试验(ELISA),测定血浆中DNA氧化损伤指标8-羟基脱氧鸟苷(8-OHdG)和抗氧化指标硫氧还蛋白还原酶(TrxR)的表达水平。结果与对照组相比,高本底