To explore the curative effect of CT-guided Iodine-125 radioactive seed implantation in the treatment of stage Ⅳprimary hepatocellular carcinoma

Objectives: To explore the clinical efficacy and survival of CT-guided Iodine-125 radioactive seed implantation in the treatment of stage Ⅳ primary hepatocellular carcinoma.Methods: A retrospective study of 62 patients with primary hepatocellular carcinoma in our hospital from January2017 to December 2018 [60 males, 2 females, age(52.76 ± 10.82) years old], All patients were implanted with Iodine-125 radioactive seeds under CT guidance, followed up regularly after operation to observe the clinical efficacy, including comparison of changes in cancer size before and after treatment, tumor marker AFP, and improvement in complications such as abdominal pain and ascites. Follow-up 3–36 months to assess patient survival.Results: Among the 62 patients, 3 months after Iodine-125 radioactive seed implantation, 5 cases(8.1%) had complete remission of cancer, 33 cases(53.2%) had partial remission, 12 cases(19.4%) had stable lesions, and 12 cases(19.4%) had disease progression. The effective rate was 61.3%. The tumor volume(31.44 ± 14.51 cm3) was significantly smaller than before(50.96 ± 30.13 cm3)(t=5.303, p < 0.05). The tumor marker AFP(69.28 ±50.99) ug/L of 3 months after implantation was significantly lower than that before treatment(90.63 ± 68.58)ug/L(t=3.702, P < 0.05). The average survival time of Iodine-125 seed implantation for stageⅣhepatocellular carcinoma is 11.47 ± 0.85 months, and the median survival time is 9 months. The survival time of the group with better pathological differentiation(grade Ⅰ+ⅡⅠ) was significantly better than that of the group with poor differentiation(grade Ⅲ+Ⅳ)(x2=6.869 p < 0.05). Among the 38 patients with different degrees of abdominal pain,22 patients improved better than before;15 of 28 patients with different degrees of ascites were better than before. All patients had no serious complications related to treatment.Conclusions: Iodine-125 radioactive seed implantation therapy can safely and effectively treat hepatocellular carcinoma, and relieve the clinical symptoms of abdominal pain and ascites.

Radioactive 125I seed implantation for pancreatic cancer with unexpected liver metastasis:A preliminary experience with 26 patients

BACKGROUND Preoperative diagnosis rate of pancreatic cancer has increased year by year.The prognosis of pancreatic cancer patients with unexpected liver metastasis found by intraoperative exploration is very poor,and there is no effective and unified treatment strategy.AIM To evaluate the therapeutic effect of radioactive 125I seed implantation for pancreatic cancer patients with unexpected liver metastasis.METHODS The demographics and perioperative outcomes of patients who underwent 125I seed implantation to treat pancreatic cancer with unexpected liver metastasis between January 1,2017 and June 1,2019 were retrospectively analyzed.During the operation,125I seeds were implanted into the pancreatic tumor under the guidance of intraoperative ultrasound,with a spacing of 1.5 cm and a row spacing of 1.5 cm.For patients with obstructive jaundice and digestive tract obstruction,choledochojejunostomy and gastroenterostomy were performed simultaneously.After operation,the patients were divided into a non-chemotherapy group and a chemotherapy group that received gemcitabine combined with albumin-bound paclitaxel treatment.RESULTS Preoperative imaging evaluation of all patients in this study showed that the tumor was resectable without liver metastasis.There were 26 patients in this study,including 18 males and 8 females,aged 60.5±9.7 years.The most common tumor site was the pancreatic head(17,65.4%),followed by the pancreatic neck and body(6,23.2%)and pancreatic tail(3,11.4%).Fourteen patients(53.8%)underwent palliative surgery and postoperative pain relief occurred in 22 patients(84.6%).The estimated blood loss in operation was 148.3±282.1 mL and one patient received blood transfusion.The postoperative hospital stay was 7.6±2.8 d.One patient had biliary fistula,one had pancreatic fistula,and all recovered after conservative treatment.After operation,7 patients received chemotherapy and 19 did not.The 1-year survival rate was significantly higher in patients who received chemotherapy than in those who did not(68.6%vs 15.8%,P=0.012).The mean overall survival of patients in the chemotherapy group and non-chemotherapy group was 16.3 mo and 10 mo,respectively(χ2=7.083,P=0.008).CONCLUSION Radioactive 125I seed implantation combined with postoperative chemotherapy can prolong the survival time and relieve pain of pancreatic cancer patients with unexpected liver metastasis.

DTI and pathological changes in a rabbit model of radiation injury to the spinal cord after ^(125)I radioactive seed implantation

Excessive radiation exposure may lead to edema of the spinal cord and deterioration of the nervous system. Magnetic resonance imaging can be used to judge and assess the extent of edema and to evaluate pathological changes and thus may be used for the evaluation of spinal cord injuries caused by radiation therapy. Radioactive ^125I seeds to irradiate 90% of the spinal cord tissue at doses of 40–100 Gy （D90） were implanted in rabbits at T10 to induce radiation injury, and we evaluated their safety for use in the spinal cord. Diffusion tensor imaging showed that with increased D90, the apparent diffusion coefficient and fractional anisotropy values were increased. Moreover, pathological damage of neurons and microvessels in the gray matter and white matter was aggravated. At 2 months after implantation, obvious pathological injury was visible in the spinal cords of each group. Magnetic resonance diffusion tensor imaging revealed the radiation injury to the spinal cord, and we quantified the degree of spinal cord injury through apparent diffusion coefficient and fractional anisotropy.

Dosimetry for ^(125) I radioactive seed implantation therapy for hepatocellular carcinoma

Hepatocellular carcinoma （HCC） is an aggressive malignancy. Early lesions respond well to hepatic resection or liver transplantation. However, only a few of HCC patients are suitable for surgical intervention. External beam radiation and chemotherapy is poorly efficacious. In the last 20 years, HCCs belonging to the radiosensitive tumor group has been confirmed. Along with the development of new radiotherapy technology and facilities, the research about brachytherapy（especially ^125I seed implantation therapy） has provoked more interests in the world. Radioactive seed implantation therapy is a form of interstitial brachytherapy, with the property of local ＂conformal radiotherapy＂ and the advantages of minimal invasion, convenience, high performance, and minimal adverse effects. It is a promising therapy for HCC, however the dosimetry hasn＇ t yet been identified and lacks verification in prospective research. This report aims to further explore the best prescription dose and radioactivity for ^125I interstitial implantation brachytherapy for HCC.

Significance of 125I radioactive seed implantation on growth differentiation factor and programmed death receptor-1 during treatment of oral cancer

BACKGROUND Oral cancer(OC)is the most common malignant tumor in the oral cavity,and is mainly seen in middle-aged and elderly men.At present,OC is mainly treated clinically by surgery or combined with radiotherapy and chemotherapy;but recently,more and more studies have shown that the stress trauma caused by surgery and the side effects of radiotherapy and chemotherapy seriously affect the prognosis of patients.AIM To determine the significance of 125I radioactive seed implantation on growth differentiation factor 11(GDF11)and programmed death receptor-1(PD-1)during treatment of OC.METHODS A total of 184 OC patients admitted to The Second Affiliated Hospital of Jiamusi University from May 2015 to May 2017 were selected as the research subjects for prospective analysis.Of these patients,89 who received 125I radioactive seed implantation therapy were regarded as the research group(RG)and 95 patients who received surgical treatment were regarded as the control group(CG).The clinical efficacy,incidence of adverse reactions and changes in GDF11 and PD-1 before treatment(T0),2 wk after treatment(T1),4 wk after treatment(T2)and 6 wk after treatment(T3)were compared between the two groups.RESULTS The efficacy and recurrence rate in the RG were better than those in the CG(P<0.05),while the incidence of adverse reactions and survival rate were not different.There was no difference in GDF11 and PD-1 between the two groups at T0 and T1,but these factors were lower in the RG than in the CG at T2 and T3(P<0.05).Using receiver operating characteristic(ROC)curve analysis,GDF11 and PD-1 had good predictive value for efficacy and recurrence(P<0.001).CONCLUSION 125I radioactive seed implantation has clinical efficacy and can reduce the recurrence rate in patients with OC.This therapy has marked potential in clinical application.The detection of GDF11 and PD-1 in patients during treatment showed good predictive value for treatment efficacy and recurrence in OC patients,and may be potential targets for future OC treatment.

A prospective study:intraoperative ^(125)I radioactive seed implant therapy in advanced esophageal squamous cell carcinoma

Objective： To investigated the role of intraoperative iodine-125 （125I） brachytherapy as a treatment option for advanced thoracic esophageal squamous cell carcinoma （ESCC）. Methods： Using preoperative computed tomography （CT）-based staging criteria, between 2000 and 2008, 298 patients with ESCC （stage Ⅱ-Ⅲ） were enrolled in this prospective study. With informed consent, patients were randomized into two groups： intraoperative ^125^I seed implantation and surgery alone （control group）. Twenty to forty 125I seeds （0.5 mCi per seed）, with a total activity in 10-30 mCi, and a matched peripheral dose （MPD） of 60-70 Gy, were implanted under direct visualization. The surgical procedure used in this study was either a radical resection, which involved an esophagectomy through a left thoracotomy with two-field lymphadenectomy, or palliative resection. The postoperative complications were observed and recorded. The location and quality assessment of J25I seeds were assessed using CT scans or X-ray imaging. The short-term efficacy was evaluated according to WHO criteria. The 1, 3, 5 and 7-year survival rates were determined on follow-up. Results： There was no displacement or loss of 125I seeds. The local recurrence rates in the intraoperative 125I seed implantation group and control group were 14.9% and 38.7%, respectively （P 〈 0.05）. An objective response rate of 92% was observed in the seed implant group, which was significantly higher than 0% in the control group （P 〈 0.05）. There was no significant difference between the two groups when comparing of complications （P 〉 0.05）. The 1-year survival rate of the two groups were not significantly different （P 〉 0.05）. However, the 3, 5 and 7-year survival rates in the united 125I group （64%, 55.3% and 8%, respectively） were statistically different from those in the control group （52%, 29.1% and 1.4%,respectively）（P 〈 0.05）. Conclusion： Intraoperative 125I seed implantation is safe and effective for advanced ESCC. Seed implantation may reduce the local recurrence rate and improve survival in patients with ESCC. The MPD of 60-70 Gy, with single 125I seed activity of 0.5 mCi, is reasonable.

Intraoperative permanent implantation of radioactive I-125 seed for local advanced non small lung cancer

Objective: To study the clinical efficacy and methods of permanent implantation of radioactive I-125 seed in surgery for local advanced non small lung cancer (LANSCLC). Methods: From Apr. 2004 to Apr. 2006, the I-125 seeds were implanted into 30 patients with LANSCLC in surgery. The numbers of seeds were 10–40. The chemotherapy was performed in 10 to 14 days after operation. Results: There was no operative death, and the distribution of seeds and complications were reviewed by CT and X-ray after treatment. The distribution of seeds was satisfactory in all patients. The complete response rate (CR) was 56.6% and the part response (PR) was 26.6%. The overall response rate was 83.3% after 4–24 months of surgery. There was no one occurred radiation pneumonia. Prospective efficacy await further follow-up. Conclusion: Permanent implantation of I-125 seed in surgery for LANSCLC, is a safe and effective method with mild complications.

Implanting iodine-125 seeds into rat dorsal root ganglion for neuropathic pain: neuronal microdamage without impacting hind limb motion

The use of iodine-125 （L251） in cancer treatment has been shown to relieve patients＇ pain. Consid- ering dorsal root ganglia are critical for neural transmission between the peripheral and central nervous systems, we assumed that 125I could be implanted into rat dorsal root ganglia to provide relief for neuropathic pain. 125I seeds with different radioactivity （0, 14.8, 29.6 MBq） were im- planted separately through L4-5 and L5-6 intervertebral foramen into the vicinity of the L5 dorsal root ganglion, von Frey hair results demonstrated the mechanical pain threshold was elevated after implanting 125I seeds from the high radioactivity group. Transmission electron microscopy revealed that nuclear membrane shrinkage, nucleolar margination, widespread mitochondrial swelling, partial vacuolization, lysosome increase, and partial endoplasmic reticulum dilation were visible at 1,440 hours in the low radioactivity group and at 336 hours in the high radio- activity group. Abundant nuclear membrane shrinkage, partial fuzzy nuclear membrane and endoplasmic reticulum necrosis were observed at 1,440 hours in the high radioactivity group. No significant difference in combined behavioral scores was detected between preoperation and postoperation in the low and high radioactivity groups. These results suggested that the mechan- ical pain threshold was elevated after implanting 125I seeds without influencing motor functions of the hind limb, although cell injury was present.

CT引导下^(125)I粒子植入联合TACE+射频消融治疗肝包膜下小肝癌的价值

目的探讨计算机断层扫描(CT)引导下放射性^(125)I粒子植入联合肝动脉化疗栓塞(TACE)+射频消融治疗肝包膜下小肝癌的价值。方法选取2020年1月-2022年2月收治的80例肝包膜下小肝癌患者,随机分为观察组和对照组各40例,对照组采用TACE+射频消融术治疗,观察组在对照组的基础上采用CT引导下^(125)I粒子植入治疗,比较两组客观缓解率(ORR)、肝功能[谷丙转氨酶(ALT)、天冬氨酸转氨酶(AST)和总胆红素(TBil)]、血清肿瘤标志物[甲胎蛋白(APF)、癌胚抗原(CEA)]、不良反应以及无进展生存率。结果观察组ORR高于对照组(85.00%vs 62.50%,χ^(2)=5.230,P<0.05);两组ALT、AST、TBil水平比较,差异无统计学意义(P>0.05);治疗后,观察组APF、CEA水平低于对照组(t=7.616;t=8.938,P<0.05);两组不良反应水平比较,差异无统计学意义(P>0.05);观察组1年无进展生存率为80.00%,高于对照组的50.00%(Log Rankχ^(2)=7.487,P<0.05)。结论CT引导下^(125)I粒子植入联合TACE+射频消融治疗肝包膜下小肝癌的疗效显著,可有效降低血清肿瘤标志物水平,提高无进展生存率,且安全性较好。

超声引导下放射性^(125)I粒子植入治疗转移性腹膜后去分化脂肪肉瘤1例

去分化脂肪肉瘤(DDLPS)是一种罕见的脂肪肉瘤亚型,预后不良。本病例报告描述了1例65岁中国女性的肝脏及腹膜后DDLPS,临床表现为无痛性腹部肿物。进行计算机断层扫描和超声检查发现瘤体较大且出现部分脏器转移,遂行腹膜后巨大肿瘤切除术及肝部分切除术。术后肿瘤免疫组织化学表现为S-100(+),SOX10(-),Desmin(+)。患者愈合良好,为控制转移病灶,术后三个月行超声引导下右侧腹膜后(肝肾间隙)肿瘤放射性^(125)I粒子植入治疗。通过粒子放射治疗,达到稳定病情的治疗目标。本病例报告对该患者的治疗及病例资料进行分析,从DDLPS的临床诊断、治疗和病理特点等方面对文献进行综述,以期提高诊疗水平。

新型携^(125)I粒子鼻饲营养管治疗食管癌患者周围辐射剂量率的监测

目的:监测新型携^(125)I粒子营养管置入食管癌患者术后周身辐射剂量率,进而指导医护防护。方法:对2019年7月-2021年9月间接受新型携^(125)I粒子鼻饲营养管(简称粒子营养管)置入的30名患者在未辐射防护和0.25 mm铅衣防护状态下,分别于术后即刻和6周,监测胸骨水平前、后、左、右四个方向不同距离(距皮肤表面0.0、0.2、0.4、0.6、0.8和1.0 m)的辐射剂量率,并将点测量值与空气本底值比较。结果:0.25 mm铅衣防护下,术后即刻后、左、右方位及术后6周各方位0.0 m辐射剂量监测值与空气本底值相比差异均无统计学意义(P均>0.05);无防护状态下即刻,在粒子营养管置入患者的前、后、左、右1.0、0.6、0.8、0.8 m处,剂量率与本底值比较,差异无统计学意义(P>0.05);无防护状态下6周后,患者前、后、左、右0.8、0.4、0.6、0.6 m处,剂量率与本底值比较,差异无统计学意义(P>0.05)。结论:在对接受粒子营养管治疗的患者进行诊疗时,应保持1米以上的安全距离,近距离接触时应选用铅衣等防护用品,减少辐射损伤。

^(125)I放射性粒子植入治疗的远隔效应联合PD-1/PD-L1抑制剂协同抗肿瘤作用的研究进展

^(125)I放射性粒子植入作为抗肿瘤近距离放疗的重要手段,在直接杀伤肿瘤细胞的同时可诱导肿瘤特异性抗原释放,激活抗肿瘤免疫效应。远隔效应是指放疗照射局部组织的同时可以在远离照射的部位引发生物响应的现象。而^(125)I放射性粒子植入由于具有局部放射剂量高、正常组织损伤小的优势更有利于肿瘤特异性抗原的释放和传递。^(125)I放射性粒子植入联合程序性细胞死亡受体1/程序性细胞死亡配体1抑制剂既能减少放射性损伤的发生,又有潜在诱导更多远隔效应发生的可能,提高抗肿瘤治疗的疗效。因此,深入探究两种治疗方法的作用机制及联合应用模式,可为晚期恶性肿瘤的综合治疗提供重要的理论支持。

Biological effects of low-dose-rate irradiation of pancreatic carcinoma cells in vitro using ^(125)I seeds

AIM:To determine the mechanism of the radiationinduced biological effects of 125I seeds on pancreatic carcinoma cells in vitro.METHODS:SW1990 and PANC-1 pancreatic cancer cell lines were cultured in DMEM in a suitable environment.Gray’s model of iodine-125(125I)seed irradiation was used.In vitro,exponential phase SW1990,and PANC-1cells were exposed to 0,2,4,6,and 8 Gy using 125I radioactive seeds,with an initial dose rate of 12.13c Gy/h.A clonogenic survival experiment was performed to observe the ability of the cells to maintain their clonogenic capacity and to form colonies.Cell-cycle and apoptosis analyses were conducted to detect the apoptosis percentage in the SW1990 and PANC-1 cells.DNA synthesis was measured via a tritiated thymidine(3H-Td R)incorporation experiment.After continuous low-dose-rate irradiation with 125I radioactive seeds,the survival fractions at 2 Gy(SF2),percentage apoptosis,and cell cycle phases of the SW1990 and PANC-1 pancreatic cancer cell lines were calculated and compared.RESULTS:The survival fractions of the PANC-1 andSW1990 cells irradiated with 125I seeds decreased exponentially as the dose increased.No significant difference in SF2 was observed between SW1990 and PANC-1 cells(0.766±0.063 vs 0.729±0.045,P<0.05).The 125I seeds induced a higher percentage of apoptosis than that observed in the control in both the SW1990and PANC-1 cells.The rate of apoptosis increased with increasing radiation dosage.The percentage of apoptosis was slightly higher in the SW1990 cells than in the PANC-1 cells.Dose-dependent G2/M cellcycle arrest was observed after 125I seed irradiation,with a peak value at 6 Gy.As the dose increased,the percentage of G2/M cell cycle arrest increased in both cell lines,whereas the rate of DNA incorporation decreased.In the 3H-Td R incorporation experiment,the dosimetry results of both the SW1990 and PANC-1cells decreased as the radiation dose increased,with a minimum at 6 Gy.There were no significant differences in the dosimetry results of the two cell lines when they were exposed to the same dose of radiation.CONCLUSION:The pancreatic cancer cell-killing effects induced by 125I radioactive seeds mainly occurred via apoptosis and G2/M cell cycle arrest.

Iodine-125 interstitial brachytherapy for experimental liver cancer

Objective:To study the effect of iodine-125 interstitial brachytherapy on liver cancer. Methods: Animal model of human liver cancer was established by injecting SMMC-7721 cells cultivated in vitro subcutaneously into the flank of BALB/c nude mice. Nude mice with tumor of 5 mm in diameter were randomly divided into 2 groups (n = 10). One iodine-125 seed of apparent activity 0. 8 mCi was implanted into the center of tumor in treatment group, whereas an inactive seed was implanted in control group. The other 20 nude mice with tumor reaching 10 mm in diameter were also treated as above. The size of tumor was determined weekly after implantation, and pathological examination and blood routine were taken on the 28th day. Results: Tumor growth was obviously inhibited in treatment group of tumor of 5 mm in diameter, and there was statistically significant difference in tumor volume between treatment and control groups (P<0. 01). Around iodine-125 seed, apparent necrosis of tumor was shown in treatment group, accompanied by karyopyknosis and reduced plasma in residual tumor cells microscopically. Tumor growth was not inhibited in either treatment or control group of tumor of 10 mm in diameter. There was no obvious adverse effect except for decreased white blood cells in treatment groups. Conclusion: There is certain effect of iodine-125 interstitial brachytherapy on liver cancer, which is associated with the size of tumor.

放射性^(125)I粒子植入治疗特殊部位肝肿瘤的安全性及有效性

目的:评估放射性^(125)I粒子植入治疗特殊部位肝肿瘤的安全性及有效性。方法:分析2015年12月—2021年12月采用CT引导下放射性^(125)I粒子植入治疗49例60个特殊部位的肝脏肿瘤的临床资料。主要终点是总生存期(OS),次要终点包括无进展生存期(PFS)、疾病控制率(DCR)、客观缓解率(ORR)及肝内复发率(LRR),评估与肝内复发相关的潜在因素。结果:技术成功率为100%,少数患者出现了术后并发症,对症处理后好转。中位OS为12个月(95%CI:11.6612.34),中位PFS为12个月(95%CI:10.8713.13)。1年DCR、ORR和LRR分别为93.48%、60.87%和28.26%。治疗前与治疗后1个月的血液学指标差异无统计学意义(P>0.05)。对肿瘤复发相关因素行Cox单因素分析,结果显示肿瘤来源是影响患者肝内复发时间的因素(P=0.012)。结论:CT引导下放射性^(125)I粒子植入治疗特殊部位肝肿瘤,是一种安全、有效的治疗方法,具有较高的疾病控制率和良好的生存前景,值得临床上进一步推广应用。

^(125)I放射性粒子植入治疗复发性腭部小唾液腺恶性肿瘤7例临床分析

目的:探讨^(125)I放射性粒子植入治疗复发性腭部小唾液腺恶性肿瘤的临床效果。方法:对7例手术+放疗后复发且拒绝二次手术的腭部小唾液腺恶性肿瘤患者进行^(125)I放射性粒子植入治疗,根据患者具体情况制定治疗计划,术中将^(125)I放射性粒子植入设计的靶区组织间,术后视情况戴用赝复体式放射性粒子布源器。定期随访,观察治疗效果及不良反应。结果:7例患者随访17~62个月,均未见肿瘤再次复发,未出现明显3级及以上放射性损伤。随访过程中,1例高龄患者因全身疾病死亡,3例患者出现轻度暂时性不良反应。结论:对于复发的腭部小唾液腺恶性肿瘤,^(125)I放射性粒子植入治疗近期疗效良好,是一种安全、微创、有效的治疗方案。

3D打印非共面模板引导^(125)I粒子植入治疗肝恶性肿瘤剂量学研究

目的比较3D打印非共面模板(3D-PNCT)引导^(125)I粒子植入治疗肝恶性肿瘤术前与术后剂量学结果,探索3D-PNCT辅助放射性粒子植入治疗肝恶性肿瘤的可行性。方法回顾性收集2019年6月至2021年12月在浙江省肿瘤医院介入科接受3D-PNCT引导^(125)I粒子植入术治疗的肝癌患者20例,处方剂量130~150 Gy。搜集并对比术前、术后剂量学参数,包括D_(90)、D_(100)、V_(90)、V_(100)、V_(150)、V_(200)、CTV体积。按照英国哥伦比亚癌症中心粒子植入质量评价标准对操作评价。结果20例患者设计打印20块模板,技术成功19例,实际针数术后与术前一致8例,术中优化增加针道8例,减少3例。术后验证质量评价结果显示为优的患者10例,良5例,中3例,差2例,技术失败1例。与术前计划相比,术后D_(90)、D_(100)、V_(200)、CTV平均体积差异无统计学差异(P>0.05)。V_(90)、V_(100)、V_(150)差异有统计学差异(P<0.05)。结论使用3D-PNCT引导^(125)I粒子植入治疗肝恶性肿瘤主要剂量学指标在手术前、后基本吻合,有良好的治疗精确性,能满足临床需求。

Relationship between miR-7-5p expression and ^(125)I seed implantation efficacy in pancreatic cancer and functional analysis of target genes

Objective The aim of this study was to investigate the relationship between miR-7-5p expression and intertissue-^(125)I irradiation sensitivity in pancreatic cancer tissues and to analyze the function of target genes.Methods Thirty-seven patients with unresectable pancreatic ductal adenocarcinoma(PDAC)treated with radioactive ^(125)I seed implantation were enrolled.RT-PCR was used to detect the expression level of miR-7-5p in cancer tissues and analyze the relationship between miR-7-5p expression and ^(125)I radiation sensitivity.Bioinformatic software and online tools were used to predict the miR-7-5p target genes and analyze their functional annotation and pathway enrichment.Results Radioactive ^(125)I seed implantation was followed up for 2 months.The objective response rate of the miR-7-5p high expression group was 65.0%(13/20),whereas the objective response rate of the miR-7-5p low expression group was 5.88%(1/17),and the difference between the two groups was statistically significant(χ^(2)=13.654,P<0.001).A total of 187 target genes were predicted using three databases.GO functional annotation showed that target genes were mainly involved in cellular response to insulin stimulus,regulation of gene expression by genetic imprinting,cytosol,peptidyl-serine phosphorylation,bHLH transcription factor binding,cargo loading into vesicles,cellular response to epinephrine stimulus,and nucleoplasm.KEGG pathway enrichment analysis showed that target genes were mainly involved in the ErbB signaling pathway,HIF-1 signaling pathway,axon guidance,longevity regulatory pathway,endocrine resistance,glioma,choline metabolism in cancer,and EGFR tyrosine kinase inhibitor drug resistance.Molecular complex detection analysis by Cytoscape revealed that PIGH,RAF1,EGFR,NXT2,PIK3CD,PIK3R3,ERBB4,TRMT13,and C5orf22 were the key modules of miR-7-5p target gene clustering.Conclusion The expression of miR-7-5p in pancreatic cancer tissues positively correlated with the radiosensitivity of ^(125)I seeds.Via targeted gene regulation,miR-7-5p acts on the network of multiple signaling pathways in PDAC and participates in its occurrence and development.Thus,miR-7-5p may become a predictive index of ^(125)I seed implantation therapy sensitivity in PDAC patients.

^(125)I放射性粒子植入治疗肿瘤病人心理弹性、家庭亲密度与适应性和孤独感的相关性研究

目的:探讨^(125)I放射性粒子植入治疗肿瘤病人的心理弹性、家庭亲密度与适应性和孤独感的相关性。方法:采取便利抽样法,选取106例行^(125)I放射性粒子植入治疗的肿瘤病人作为研究对象,调查病人的一般资料,采用心理弹性量表中文版(CD-RISC)评价病人的心理弹性水平,并使用家庭亲密度与适应性量表中文版(FACESIICV)及孤独感自评量表(UCLA)进行调查问卷。结果:^(125)I放射性粒子植入治疗肿瘤病人孤独感量表得分为(40.01±8.63)分,心理弹性量表得分为(61.79±14.54)分,家庭亲密度与适应性量表得分为(116.32±18.80)分;不同性别、职业、文化程度、家庭人均月收入的孤独感得分差异均有统计学意义(P<0.01),不同性别、家庭人均月收入心理弹性得分和家庭亲密度与适应性得分差异有统计学意义(P<0.01)。106例^(125)I放射性粒子植入治疗的肿瘤病人的孤独感量表得分和心理弹性量表得分呈显著负相关(r=-0.912,P<0.01),心理弹性量表得分和家庭亲密度与适应性量表得分呈显著正相关关系(r=0.884,P<0.01),孤独感量表得分和家庭亲密度与适应性量表得分呈显著负相关关系(r=-0.907,P<0.01);纳入性别、职业、文化程度、家庭人均月收入、心理弹性得分、家庭亲密度与适应性得分进行孤独感影响因素多元线性逐步回归分析,家庭亲密度与适应性得分和家庭人均月收入均有统计学意义(P<0.01)。结论:不同性别、职业、文化程度、家庭人均月收入是^(125)I放射性粒子植入治疗的肿瘤病人孤独感的影响因素,及早对孤独感程度进行评估并提前进行有效干预,改善病人家庭亲密度与适应性情况,对于降低其孤独感程度具有显著效果,对促进病人早日回归家庭与社会具有重大的意义。

免疫治疗联合放射性^(125)I粒子植入治疗晚期肺癌患者的临床疗效

目的探讨免疫治疗联合放射性^(125)I粒子植入治疗晚期肺癌患者的临床疗效。方法采用区组随机法将50例局部晚期肺癌患者分为对照组和研究组,每组25例,对照组患者给予放射性^(125)I粒子植入治疗,研究组患者给予放射性^(125)I粒子植入联合卡瑞利珠单抗治疗。比较两组患者的主要观察终点(肿瘤直径、随访1年的无进展生存期)、次要终点[不良事件、客观缓解率(ORR)、疾病控制率(DCR)]。结果研究组患者的ORR、DCR为80.00%、96.00%,与对照组患者的88.00%、100%比较,差异均无统计学意义(P﹥0.05)。接受^(125)I粒子植入治疗的25例对照组患者,均未发生不良事件。接受^(125)I粒子植入联合免疫治疗的25例研究组患者中,任意级别免疫相关不良事件(irAE)的发生率为88.00%,其中1~2级irAE发生率为84.00%,3~5级irAE发生率为4.00%,所有级别最常见irAE为乏力,发生率为44.00%。截至随访结束,对照组患者的中位无进展生存期为3.00个月(95%CI:2.543~3.457),明显短于研究组患者的8.00个月(95%CI:5.552~10.448),差异有统计学意义(P﹤0.01)。治疗后,研究组患者的肿瘤直径小于本组治疗前和对照组,差异均有统计学意义(P﹤0.05)。结论卡瑞利珠单抗联合放射性^(125)I粒子植入治疗,可以延长晚期肺癌患者的中位无进展生存期,减小肿瘤直径。