模拟调强技术照射鼻咽低分化鳞癌细胞的生物效应机制研究

Objective To study the altered radiobiological effect of simulative intensity-modulated radiotherapy (SIMR) in cultured human nasopharyngeal carcinoma (NPC) cells and the related mechanism. Methods Single cell suspension of exponentially growing CNE-2 cells, a poor differentiated NPC cell line, was seeded and cultured for 12 hours, then the cells were irradiated in two different models by 6 MV X-ray beams at 3 Gy/min. In single fraction irradiation (SFR) model, cells were irradiated a single fraction of 0, 2, 4, 6 or 8 Gy within 0 to 3 minutes. In S1MR model, cells were irradiated 0, 2, 4, 6 or 8 Gy in 5 frac-tions with interval of 8.0-8.5 minutes between. Clonogenic assay was performed to determine the radiosen-sitivity. Cellular apoptosis was measured by flow cytometry. RT-PCR was used to detect mRNA expressions of Bax and Bcl-2, Respectively. Results Compared with SFR group, the survival fraction in SIMR group was higher at all the dose levels. The values of α, β, D0 and Dq were higher in SIMR group than in SFR group. At dose levels of 2 Gy, 4 Gy and 6 Gy, The early and late apoptotic cells in SIMR group were lower than in SFR group (21.20%: 15.89%, F=18.51, P=0.020;13.00%: 10.20, F=15.67, P=0.040).The mRNA expression of Bax was upregulated in a dose-dependent manner in the both groups. Compared with SFR group, the mRNA expression of Bax in SIMR group was lower at all the dose levels (Mean value of 76.75% : 62.50%, F =36.57, P =0.000). Bcl-2 mRNA expression at every dose level had no significant difference between the two groups (Mean value of 29.25% : 29.75%, F=0.74, P=0.800). Conclusions Prolonged delivery time in SIMR model can decrease the radiobiological effects.     

介入加放疗综合治疗6例晚期下咽癌临床报道

下咽癌是头颈部比较常见的恶性肿瘤，约占头颈部恶性肿瘤的0．8％～2．5％，由于解剖结构特殊，治疗上首先放疗。放疗后5年生存率约50％，晚期病例仅为10％～20％。我们对6例晚期下咽癌放疗前中进行选择性动脉灌注化疗，受到很好效果，现报告如下。     

鼻腔嗅神经母细胞瘤11例临床分析

目的 回顾分析鼻腔嗅神经母细胞瘤的放疗疗效.方法 1974～1994年鼻腔嗅神经母细胞瘤11例,其中B期6例,C期5例.单纯放疗6例,术后放疗5例.3例术后无肿瘤肉眼残留者照射剂量D_T45Gy～55Gy/23～28次共4.5～5.5周.其余8例照射剂量D_T均在60Gy/30次共6周以上.3例颈淋巴结转移者照射剂量D_T60Gy～65Gy/30～33次共6～7周.结果 本组病例三、五年生存率分别为55%、36%,单纯放疗组分别为33%、17%,术后放疗组分别为80%、60%.P值0.2727,二组在统计学上无显著差异.全组病例中3例局部复发,2例血行转移.结论 B、C期患者根治性手术加术后放疗为局部控制的较好治疗方案.     

新疆地区局部晚期鼻咽癌Nomogram预后模型研究

目的:分析新疆地区局部晚期鼻咽癌患者治疗后的预后相关因素,构建列线图(Nomogram)预后模型,并对此模型进行验证。方法:选择2010年7月至2017年6月新疆医科大学附属肿瘤医院收治并行根治性调强放射治疗的鼻咽癌患者317例,使用最小绝对收缩和选择算子(LASSO)回归法进行单因素筛选后行Cox多因素回归分析,并构...     

疗前绝对淋巴细胞计数及其相关参数比对局部晚期宫颈癌患者疗效的预测价值

目的:探讨治疗前绝对淋巴细胞计数(ALC)及其中性粒-淋巴细胞比(NLR)、单核细胞-淋巴细胞比(MLR)以及血小板-淋巴细胞比(PLR)对局部晚期宫颈癌(LACC)患者预后的预测价值。方法:纳入2016—2019年间新疆医科大学附属肿瘤医院收治的初诊LACC患者175例,完整记录患者的临床资料及治疗前ALC并计算NL...     

非小细胞肺癌组织中Snail、E-cadherin及N-cadherin的表达及临床意义

目的探讨指转录因子Snail、上皮细胞钙粘蛋白(E-cadherin)及神经钙黏素(N-cadherin)在非小细胞肺癌组织中的表达及其之间的相关性。方法采用免疫组化法检测63例非小细胞肺癌(NSCLC)手术切除标本及30例癌旁组织中Snail、E-cadherin、N-cadherin蛋白的表达,并分析相互间关系及其临床意义。结果与癌旁组织比较,NSCLC组织中E-cadherin表达显著减少,N-cadherin和Snail表达明显增加(P<0.01)。NSCLC组织中,Snail的表达与N-cadherin呈明显的正相关(P<0.05,r=0.33),与E-cadherin呈显著负相关(P<0.05,r=-0.41),N-cadherinl的表达与E-cadheri也呈明显负相关(P<0.05,r=-0.56)。Snail表达阳性率与TNM分期和有无转移相关(P<0.05);E-cadherin表达阳性率与TNM分期和有无转移相关(P<0.05);N-cadherin表达阳性率与组织学分型、TNM分期和有无转移相关(P<0.05)。结论 NSCLC癌组织中Snail、E-cadherin和N-cadherin表达水平与肿瘤的浸润转移密切相关,可作为临床诊断和治疗靶点的参考指标。     

立体定向放疗与手术治疗早期非小细胞肺癌疗效的Meta分析

目的：比较体部立体定向放疗（stereotactic body radiotherapy,SBRT or stereotactic ablative radiothera-py,SABR）与手术治疗早期非小细胞肺癌（non-small cell lung cancer,NSCLC）的疗效。方法通过计算机检索Cochrane图书馆、PubMed、Medline、中国期刊全文数据库（CNKI）、中国生物医学文献数据库（CBM）、万方数据库,收集国内外公开发表关于 SBRT与手术治疗早期 NSCLC的相关文献,采取双人平行评价的方法对收集的文献进行评价,提取资料并交叉核对,应用统计软件RevMan5．2进行Meta分析。结果筛查后共纳入4项回顾性研究,均为英文文献,共1265个患者,其中手术治疗914例（手术组）,SBRT351例（SBRT组）,根据研究内容将两组生存率分为 A、B、C 3组进行 Meta分析,4项研究综合评价2种治疗方法生存率作为 A组,2项研究两组病例进行了1∶1配对,两组在年龄、合并症评分及肿瘤分期等因素方面差异无统计学意义,为 B组;另外2项研究对两组病例也进行了1∶1配对,但两组在年龄、合并症及肺功能等因素方面差异有统计学意义,且手术组优于 SBRT组,为 C组。A组：1、2、3年总生存率差异均有统计学意义（P ＜0．0001～0．00001）,手术组优于 SBRT组;B组：1、2年总生存率差异无统计学意义（P ＝0．35;P ＝0．29）,3年总生存率差异有统计学意义（P ＝0．02）,手术组优于 SBRT组;C组：1、2、3年总生存率差异均有统计学意义（P ＜0．01～0．00001）,手术组优于 SBRT组。2项研究中两组肿瘤特异性生存率差异无统计学意义（P ＝0．46,P ＝0．19）。结论由于两组间存在年龄、肺功能及合并症等方面的差异,不能明确得出手术组优于 SBRT组的结论,但两组间肿瘤特异性生存率无差异,两组疗效的比较还需要临床随机对照试验来进一步研究。     

模拟调强技术照射鼻咽低分化鳞癌细胞的生物效应机制研究

Objective To study the altered radiobiological effect of simulative intensity-modulated radiotherapy (SIMR) in cultured human nasopharyngeal carcinoma (NPC) cells and the related mechanism. Methods Single cell suspension of exponentially growing CNE-2 cells, a poor differentiated NPC cell line, was seeded and cultured for 12 hours, then the cells were irradiated in two different models by 6 MV X-ray beams at 3 Gy/min. In single fraction irradiation (SFR) model, cells were irradiated a single fraction of 0, 2, 4, 6 or 8 Gy within 0 to 3 minutes. In S1MR model, cells were irradiated 0, 2, 4, 6 or 8 Gy in 5 frac-tions with interval of 8.0-8.5 minutes between. Clonogenic assay was performed to determine the radiosen-sitivity. Cellular apoptosis was measured by flow cytometry. RT-PCR was used to detect mRNA expressions of Bax and Bcl-2, Respectively. Results Compared with SFR group, the survival fraction in SIMR group was higher at all the dose levels. The values of α, β, D0 and Dq were higher in SIMR group than in SFR group. At dose levels of 2 Gy, 4 Gy and 6 Gy, The early and late apoptotic cells in SIMR group were lower than in SFR group (21.20%: 15.89%, F=18.51, P=0.020;13.00%: 10.20, F=15.67, P=0.040).The mRNA expression of Bax was upregulated in a dose-dependent manner in the both groups. Compared with SFR group, the mRNA expression of Bax in SIMR group was lower at all the dose levels (Mean value of 76.75% : 62.50%, F =36.57, P =0.000). Bcl-2 mRNA expression at every dose level had no significant difference between the two groups (Mean value of 29.25% : 29.75%, F=0.74, P=0.800). Conclusions Prolonged delivery time in SIMR model can decrease the radiobiological effects.     

57例鼻腔NK/T细胞淋巴瘤临床分析

目的:探讨鼻腔NK/T细胞淋巴瘤的临床表现、放疗和化疗的近期疗效以及不同的治疗方法对生存率的影响。方法:收集我院1994年2月～2002年12月收治的57例经病理形态学诊断为鼻腔NK/T细胞淋巴瘤患者的临床资料,主要表现为鼻塞、涕血、恶臭。采用单纯放疗或放疗后化疗35例,化疗后放疗22例,观察及治疗效果。结果:近期疗效:35例经单纯放疗或放疗后化疗,放疗后完全缓解(CR)率为74%,其余22例为化疗后放疗,化疗后CR率仅23%,单纯放疗或放疗后化疗的CR率明显高于化疗后放疗的CR率(P<0.01),全组患者中先放疗组、化疗后放疗组患者的5年生存率分别为60%和55%(P>0.05)。结论:鼻腔NK/T细胞淋巴瘤的临床表现不典型,单纯放疗或放疗后化疗的近期疗效显著优于常规化疗,化疗加入放疗并未改善生存率。     

模拟调强技术照射鼻咽低分化鳞癌细胞的生物效应机制研究

Objective To study the altered radiobiological effect of simulative intensity-modulated radiotherapy (SIMR) in cultured human nasopharyngeal carcinoma (NPC) cells and the related mechanism. Methods Single cell suspension of exponentially growing CNE-2 cells, a poor differentiated NPC cell line, was seeded and cultured for 12 hours, then the cells were irradiated in two different models by 6 MV X-ray beams at 3 Gy/min. In single fraction irradiation (SFR) model, cells were irradiated a single fraction of 0, 2, 4, 6 or 8 Gy within 0 to 3 minutes. In S1MR model, cells were irradiated 0, 2, 4, 6 or 8 Gy in 5 frac-tions with interval of 8.0-8.5 minutes between. Clonogenic assay was performed to determine the radiosen-sitivity. Cellular apoptosis was measured by flow cytometry. RT-PCR was used to detect mRNA expressions of Bax and Bcl-2, Respectively. Results Compared with SFR group, the survival fraction in SIMR group was higher at all the dose levels. The values of α, β, D0 and Dq were higher in SIMR group than in SFR group. At dose levels of 2 Gy, 4 Gy and 6 Gy, The early and late apoptotic cells in SIMR group were lower than in SFR group (21.20%: 15.89%, F=18.51, P=0.020;13.00%: 10.20, F=15.67, P=0.040).The mRNA expression of Bax was upregulated in a dose-dependent manner in the both groups. Compared with SFR group, the mRNA expression of Bax in SIMR group was lower at all the dose levels (Mean value of 76.75% : 62.50%, F =36.57, P =0.000). Bcl-2 mRNA expression at every dose level had no significant difference between the two groups (Mean value of 29.25% : 29.75%, F=0.74, P=0.800). Conclusions Prolonged delivery time in SIMR model can decrease the radiobiological effects.