Efficacy and safety of anti-CD45–saporin as conditioning agent for RAG deficiency

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Monitoring of biological responses of tumor cells after irradiation with99mTc-MIBI — Anin vitro study

Summary To explore the possibility to employ^99mTc-MIBI to monitor biological response of tumor cells after irradiation and to observe the relation between the radiation doses and the uptake levels of^99mTc-MIBI in tumor cells, the cells were irradiated with a single dose of 2 Gy, 10 Gy and 20 Gy respectively. The uptake of^99mTc-MIBI in each dosage group was determined before and 24, 48, 72 h after irradiation respectively. Apoptosis index (AI), plating efficiency (PE) of tumor cells was simultaneously determined. There was a positive correlation between uptake levels of^99mc-MIBI and AI(r = −0.91,P< 0.05). A negative correlation was noted between the uptake levels and PE (r = −0.86,P< 0.05). It is suggested that^99mTc-MIBI may be used as a tracer to monitor the change of viability state of tumor cells after being irradiated with different doses.     

激光照射对小鼠骨髓细胞微核率的影响

目的　研究激光照射的生物效应。方法　采用低能量He Ne激光照射小鼠 ,每天 1次 ,每次 10min ,照射 7天后 ,处死小鼠。测定小鼠骨髓嗜多染红细胞微核的出现率。结果　经低能量He Ne激光照射的小鼠的细胞微核率与对照组比较无差异 (P >0 .0 5 )。结论　受低能量He Ne激光照射后小鼠骨髓嗜多染红细胞微核率无显著增加 ,治疗用低能量的He Ne激光不会致突变     

膝胸卧位红光照射联合肛提运动对产后痔急性发作的疗效

目的 探讨膝胸卧位红光照射联合肛提运动对产后痔急性发作的改善效果.方法 将68例经阴道分娩并发产后痔急性发作的产妇按入院时间分为对照组36例、观察组32例.两组产妇产后给予相同的产褥期知识宣教、母婴护理指导等常规护理措施,在此基础上,对照组采用屈膝侧卧位配合红光照射,观察组给予膝胸卧位红光照射联合肛提运动.观察两组产后24 h和产后5d痔疼痛程度、肛周水肿程度、治疗效果、治疗过程舒适度.结果 干预后两组疼痛评分、肛周水肿程度、治疗效果比较,差异有统计学意义(均P＜0.01);两组治疗过程舒适程度差异无统计学意义(P＞0.05).结论 产后痔急性发作的产妇应用膝胸卧位红光照射配合肛提运动能有效减轻产妇疼痛及肛周水肿程度,治疗效果较好.     

Kidney Function after Treatment for Childhood Cancer: A Report from the St. Jude Lifetime Cohort Study

BackgroundSurvivors of childhood cancer may be at increased risk for treatment-related kidney dysfunction. Although associations with acute kidney toxicity are well described, evidence informing late kidney sequelae is less robust.MethodsTo define the prevalence of and risk factors for impaired kidney function among adult survivors of childhood cancer who had been diagnosed ≥10 years earlier, we evaluated kidney function (eGFR and proteinuria). We abstracted information from medical records about exposure to chemotherapeutic agents, surgery, and radiation treatment and evaluated the latter as the percentage of the total kidney volume treated with ≥5 Gy (V5), ≥10 Gy (V10), ≥15 Gy (V15), and ≥20 Gy (V20). We also used multivariable logistic regression models to assess demographic and clinical factors associated with impaired kidney function and Elastic Net to perform model selection for outcomes of kidney function.ResultsOf the 2753 survivors, 51.3% were men, and 82.5% were non-Hispanic White. Median age at diagnosis was 7.3 years (interquartile range [IQR], 3.3–13.2), and mean age was 31.4 years (IQR, 25.8–37.8) at evaluation. Time from diagnosis was 23.2 years (IQR, 17.6–29.7). Approximately 2.1% had stages 3–5 CKD. Older age at evaluation; grade ≥2 hypertension; increasing cumulative dose of ifosfamide, cisplatin, or carboplatin; treatment ever with a calcineurin inhibitor; and volume of kidney irradiated to ≥5 or ≥10 Gy increased the odds for stages 3–5 CKD. Nephrectomy was significantly associated with stages 3–5 CKD in models for V15 or V20.ConclusionsWe found that 2.1% of our cohort of childhood cancer survivors had stages 3–5 CKD. These data may inform screening guidelines and new protocol development.     

Strain difference in transgene-induced tumorigenesis and suppressive effect of ionizing radiation

Transgenic expression in medaka of the Xiphophorus oncogene xmrk, under a pigment cell specific mitf promoter, induces hyperpigmentation and pigment cell tumors. In this study, we crossed the Hd-rR and HNI inbred strains because complete genome information is readily available for molecular and genetic analysis. We prepared an Hd-rR (p53^+/−, p53^−/−) and Hd-rR HNI hybrid (p53^+/−) fish-based xmrk model system to study the progression of pigment cells from hyperpigmentation to malignant tumors on different genetic backgrounds. In all strains examined, most of the initial hyperpigmentation occurred in the posterior region. On the Hd-rR background, mitf:xmrk-induced tumorigenesis was less frequent in p53^+/− fish than in p53^−/− fish. The incidence of hyperpigmentation was more frequent in Hd-rR/HNI hybrids than in Hd-rR homozygotes; however, the frequency of malignant tumors was low, which suggested the presence of a tumor suppressor in HNI genetic background fish. The effects on tumorigenesis in xmrk-transgenic immature medaka of a single 1.3 Gy irradiation was assessed by quantifying tumor progression over 4 consecutive months. The results demonstrate that irradiation has a different level of suppressive effect on the frequency of hyperpigmentation in purebred Hd-rR compared with hybrids.     

反义VEGF寡核苷酸联合放射线抑制食管癌细胞移植瘤生长

目的 研究干扰VEGF表达联合照射对移植瘤的影响,为抗VEGF基因治疗联合放射治疗食管癌提供理论依据.方法 将16只裸鼠分为4组:(1)对照组(2)转染组(3)照射组(4)转染组 照射组.食管癌TE.1移植瘤直,go.8 cm时开始实验,照射后反义VEGF寡核苷酸转染.观察各组裸鼠移植瘤体积变化与肿瘤生长延迟时间,应用RT-PCR、western blot检测移植瘤组织中VEGF的表达.结果 转染组、照射组、转染组 照射组的绝对延迟时间分别为(3.0 4-2.6)、(10.1±5.4)和(27.4 4-3.1)d,标准化的延迟时间为(24.4±3.1)d,对放射的增益因子为2.41.转染可降低VEGF表达.结论 VEGF能显著提高食管癌细胞株TE一1裸鼠移植瘤的放射效应.