Abnormalities of iron metabolism and erythropoiesis in vitamin E- deficient rabbits

Rabbits fed a vitamin E-deficient diet developed severe muscular dystrophy in 3-4 wk, but they did not become anemic. Nevertheless, reticulocyte counts increased in deficient rabbits (3.2%) compared to control rabbits (0.9%), and erythroid hyperplasia was evident in the bone marrow. Comparing deficient rabbits to controls, the plasma iron concentration was lower (134.4 versus 206.6 microgram/dl); the TIBC was higher (335.9 versus 228.3 microgram/dl); the whole blood protoporphyrin concentration was higher (131.6 versus 81.7 microgram/dl); and the total iron content was lower in spleen (71 versus 153 microgram), higher in skeletal muscle (4956 versus 3054 microgram), and unchanged in bone marrow, liver, and heart. Studies of iron absorption and excretion using 59Fe showed no abnormalities in deficient rabbits. There were abnormalities of ferrokinetics, however. The half-time of disappearance of 59Fe was shorter (100.6 versus 169.4 min), the plasma iron turnover was greater (1.25 versus 0.95 mg/dl blood/day), and the reappearance of 59Fe in circulating erythrocytes at day 9 was greater (77.2% versus 57.2%) in deficient rabbits. Anemia induced by phlebotomy accentuated the abnormal iron metabolism of deficient rabbits, and the animals were unable to correct the anemia. These findings show that vitamin E deficiency in rabbits causes abnormal erythropoiesis associated with abnormal iron metabolism and sequestration of iron in skeletal muscle.     

美国国家骨髓库20年回顾:成人无关供者造血干细胞移植

自1987年起,美国国家骨髓库(NMDP)提供了>30 000份URD-HCT,其中70%以上的受者是患有恶性血液病或获得性血液疾病的成人.在此期间发生很大变化,包括无偿捐献队伍的扩大、PBSCs采集、脐血库(UCB)的加入、HLA分型技术的进步、新药物的使用、低强度预处理(RIC)以及移植后免疫调节等.本文就过去20年NMDP成人受者HCT的数据及分析作一介绍.     

Imaging characteristics of papillary renal cell carcinoma by computed tomography scan and magnetic resonance imaging

AIM: To analyse the differences in the patterns between clear and papillary renal cell carcinomas using magnetic resonance imaging (MRI) and dual-phase helical computed tomography (CT). METHODS: We examined seven patients with papillary renal cell carcinoma, and six with clear cell carcinoma. The highest attenuation value of tumors in the corticomedullary phase (CMP) and the excretory phase (EP) was measured using the observer-defined region of interest (ROI). MRI consisted of T1-weighted and T2-weighted spin-echo imaging. RESULTS: All five tumors except for one with papillary renal cell carcinoma showed homogenous hypointensity, but all six tumors with clear cell carcinoma showed heterogeneous hyperintensity on their T2-weighted images. In the CMP, the mean CT numbers of the papillary renal cell carcinomas were significantly lower than those of the clear cell carcinomas. The mean enhancement of the papillary renal cell carcinomas in the CMP and the EP was significantly lower than that of the clear renal cell carcinomas. The mean CT numbers of the clear cell carcinomas in the CMP were markedly increased from those on the unenhanced CT; those in the EP were decreased gradually. But the mean CT numbers of the papillary renal cell carcinomas in the EP were still slightly more increased than those in the CMP. The enhancement patterns of the papillary renal cell carcinomas in the CMP and the EP were homogenous, but those of the clear cell carcinomas were heterogeneous. CONCLUSIONS: We can speculate the differential diagnosis from clear to papillary renal cell carcinoma using MRI and dual-phase helical CT.     

美国国家骨髓库20年回顾:成人无关供者造血干细胞移植

自1987年起,美国国家骨髓库(NMDP)提供了>30 000份URD-HCT,其中70%以上的受者是患有恶性血液病或获得性血液疾病的成人.在此期间发生很大变化,包括无偿捐献队伍的扩大、PBSCs采集、脐血库(UCB)的加入、HLA分型技术的进步、新药物的使用、低强度预处理(RIC)以及移植后免疫调节等.本文就过去20年NMDP成人受者HCT的数据及分析作一介绍.     

美国国家骨髓库20年回顾:成人无关供者造血干细胞移植

自1987年起,美国国家骨髓库(NMDP)提供了>30 000份URD-HCT,其中70%以上的受者是患有恶性血液病或获得性血液疾病的成人.在此期间发生很大变化,包括无偿捐献队伍的扩大、PBSCs采集、脐血库(UCB)的加入、HLA分型技术的进步、新药物的使用、低强度预处理(RIC)以及移植后免疫调节等.本文就过去20年NMDP成人受者HCT的数据及分析作一介绍.     

Comparative study of the radiosensitising and cell cycle effects of vinflunine and vinorelbine, <Emphasis Type="Italic">in vitro</Emphasis>

Background  

Vinca alkaloids are an important class of anticancer agents and semisynthetic vinca alkaloids are developed to improve the therapeutic index of this class of drugs. In the present study, a direct comparison was made between vinflunine and vinorelbine regarding their radiosensitising and cell cycle effects.