慢性粒细胞白血病骨髓细胞体外培养净化作用实验研究

目的 :采用 FISH方法直接在干细胞水平对慢性粒细胞白血病 (CML )患者自体骨髓体外培养前后的间期细胞进行 bcr/abl融合基因检测 ,从而探讨 CML 骨髓细胞体外培养对自体骨髓移植物的净化作用。方法 :分离初治的慢性期 Ph+ CML 7例骨髓单个核细胞 (MNCs) ,体外培养 10 d,用免疫磁珠 (MACS)富集培养前后的 CD34+ 细胞 ,通过流式细胞仪检测培养前后 MNCs中 CD34+ 干细胞比例 ,然后用 FISH方法检测其中 bcr/abl融合基因 ,同时分别用正常人细胞及 K5 6 2细胞株作阴性及阳性对照。结果 :(1) 7例患者骨髓细胞培养前后 CD34+ 细胞中 bcr/abl融合基因平均检出率分别为 85 .3%± 4 .9%和 78%± 5 .1% ,有统计学意义 (P<0 .0 5 ) ,(2 )培养前培养体系中 CD34+ 细胞数量为 (6 .0 6 0± 1.5 6 4 )× 10 5个 ,培养后体系中的 CD34+细胞数量为 (5 .974± 1.4 2 4 )× 10 5个 ,两者无明显差异 (P>0 .0 5 )。 (3)在对照组中假阳性率为 2 .5 % ,假阴性率为 2 %。结论 :自体骨髓细胞体外培养对 CML 病人的骨髓肿瘤细胞有一定程度的净化作用 ;FISH技术直接在干细胞水平检测 bcr/abl融合基因 ,且能定量分析 ,较传统方法更适合对骨髓净化进行评价 ,为骨髓净化提供了一种更方便、可靠的评定方法     

超声引导介入治疗肝癌40例

目的观察超声引导介入治疗肝癌的效果。方法对40例经超声引导穿刺获得病理诊断的肝癌,经超声引导将无水酒精或化疗药物直接注入癌瘤体内后观察,其中无水酒精者30例,化疗药物10例。结果(1)治疗后肿块缩小:<5cm的肿块缩小明显,2-3cm的肿块有的可"消失"(境界模糊);(2)肿块内部回声增强,有的可钙化,血供减少或消失;(3)5-10cm的肿块可多次重复注射,多的达10次。随访3-24个月,30例存活,最长有2例存活5年。结论超声引导介入治疗肝癌疗效肯定,但无水酒精治疗较化疗药直接注射肝癌安全性高,副作用少。     

Analysis of nutritive sucking function in very low and extremely low birthweight infants in Japan: A pilot study

Aim: The purpose of the present study was to investigate the differences in nutritive sucking patterns between very low, extremely low birth‐weight infants (LBWI) and full‐term infants (FTI) and to examine the change in those sucking patterns within 5 months after birth. Methods: Sucking patterns of eight LBWI and seven FTI were compared. In addition, sucking patterns were measured in four of the LBWI and seven of the FTI until 5 months of age to determine change in sucking wave patterns over time. Results: During the first month after birth, there was a significant difference in the sucking wave between the LBWI and FTI. The sucking cycle time was significantly shorter and the intensity of the sucking pressure was significantly smaller in the LBWI than that in the FTI. By 5 months, significant correlations were noted between the actual age or the modified age and the sucking pressure in both LBWI and FTI. Conclusions: The findings suggest that the weakness of oral muscular function and less sucking skill can bring about the weakness of intensity of sucking pressure, decreased time of the sucking stage in a sucking cycle, and unstable intensity of sucking pressure and time of the sucking stage in LBWI infants, causing low efficiency of milk intake and smaller amounts of milk swallowing during each sucking period as they obstructs the development of oral muscular function itself. These problems last for a longer period of time in LBWI than in FTI, leading to a deficit in the development of masticatory function in LBWI. The results of the current pilot study will serve as a foundation to investigate the development of masticatory function in LBWI as they grow into early childhood.     

肌病肾病代谢综合征治疗进展

肌病肾病代谢综合征是急性动脉阻塞致骨骼肌溶解的严重并发症。积极治疗原发病，及早补液扩容、碱化尿液、早期血液净化治疗是降低截肢率、病死率的关键。本文就肌病肾病代谢综合征治疗进展作一综述。     

Cognitive behavioral treatment for young children with obsessive-compulsive disorder.

Obsessive-compulsive disorder (OCD) is a distressing and functionally impairing disorder that can emerge as early as age 4. Cognitive behavior therapy (CBT) for OCD in youth shows great promise for amelioration of symptoms and associated functional impairment. However, the empirical evidence base for the efficacy of CBT in youth has some significant limitations, particularly as related to treating the very young child with OCD. This report includes a quantitative review of existing child CBT studies to evaluate evidence for the efficacy of CBT for OCD. It identifies gaps in the literature that, when addressed, would enhance the understanding of effective treatment in pediatric OCD. Finally, it presents a proposed research agenda for addressing the unique concerns of the young child with OCD.     

Effect of early and late antibiotic treatment in experimental acute pancreatitis in rats

Background The clinical course in acute necrotizing pancreatitis is mainly determined by bacterial infection of pancreatic and peripancreatic necrosis. The effect of two antibiotic regimens for early and late treatment was investigated in the taurocholate model of necrotizing pancreatitis in the rat. Materials and methods Seventy male Wistar rats were divided into five pancreatitis groups (12 animals each) and a sham-operated group (10 animals). Pancreatitis was induced by intraductal infusion of 3% taurocholate under sterile conditions. Animals received two different antibiotic regimes (20 mg/kg imipenem or 20 mg/kg ciprofloxacin plus 20 mg/kg metronidazole) early at 2, 12, 20, and 28 h after induction of pancreatitis or late at 16 and 24 h after induction of pancreatitis or no antibiotics (control). Animals were examined after 30 h for pancreatic and extrapancreatic infection. Results Early and late antibiotic treatment with both regimes could significantly reduce pancreatic infection from 58 to 8–25%. However, extrapancreatic infection was only reduced by early antibiotic therapy. While quinolones also reduced bacterial counts in small and large bowel, imipenem did not. Conclusions In our animal model of necrotizing pancreatitis, early and late treatment with ciprofloxacin/metronidazole and imipenem reduce bacterial infection of the pancreas. Extrapancreatic infection, however, is reduced significantly only by early antibiotic treatment. The effectivity of early antibiotic treatment in the clinical setting should be subject to further investigation with improved study design and sufficient patient numbers.     

Engineering angiogenesis following spinal cord injury: a coculture of neural progenitor and endothelial cells in a degradable polymer implant leads to an increase in vessel density and formation of the blood–spinal cord barrier

Angiogenesis precedes recovery following spinal cord injury and its extent correlates with neural regeneration, suggesting that angiogenesis may play a role in repair. An important precondition for studying the role of angiogenesis is the ability to induce it in a controlled manner. Previously, we showed that a coculture of endothelial cells (ECs) and neural progenitor cells (NPCs) promoted the formation of stable tubes in vitro and stable, functional vascular networks in vivo in a subcutaneous model. We sought to test whether a similar coculture would lead to the formation of stable functional vessels in the spinal cord following injury. We created microvascular networks in a biodegradable two-component implant system and tested the ability of the coculture or controls (lesion control, implant alone, implant + ECs or implant + NPCs) to promote angiogenesis in a rat hemisection model of spinal cord injury. The coculture implant led to a fourfold increase in functional vessels compared with the lesion control, implant alone or implant + NPCs groups and a twofold increase in functional vessels over the implant + ECs group. Furthermore, half of the vessels in the coculture implant exhibited positive staining for the endothelial barrier antigen, a marker for the formation of the blood–spinal cord barrier. No other groups have shown positive staining for the blood–spinal cord barrier in the injury epicenter. This work provides a novel method to induce angiogenesis following spinal cord injury and a foundation for studying its role in repair.     

血管紧张素(1-7)和依那普利拉对烧伤血清离体灌注大鼠心脏功能的影响

Objective To investigate effects of angiotcnsin ( 1-7 ) [ Ang( 1-7 ) ] and enalaprilat on function of isolated rat heart perfused by burn serum. Methods Eighty SD rats were used to prepare burn serum. Hearts of another 24 SD rats were isolated to reproduce Langendorff perfusion model. The rat hearts were divided into different groups with different perfusion fluids as K-H buffer group, K-H buffer containing 20% burn serum group ( burn serum group) , K-H buffer containing 20% burn serum and 2 μg/mL enala-prilat group (enalaprilat group), and K-H buffer containing 20% burn serum and 1 nmol/mL Ang(1-7) group [ Ang(1-7) group]. The rat hearts were perfused for 30 mins with each of above-mentioned fluids in different groups. Then left ventrieular systolic pressure (LVSP) , left ventricular end diastolic pressure ( LV-EDP) , ± dp/dt max, coronary flow(CF) , level of creatine kinase (CK) and lactate dehydrogenase (LDH) in respective coronary effluent were determined. Results Compared with LVSP ( 11.2 ± 1.0 kPa, 1 kPa = 7.5 mm Hg), +dp/dt max (642±53 kPa/s), -dp/dt max (380±61 kPa/s) and CF level in K-H buffer group, CF, LVSP(5.9±0.8, 8.0±1.1, 8.9±1.3 kPa, respectively), +dp/dt max(275±37, 454±48, 479±63 kPa/s, respectively), - dp/dt max ( 135±35, 219±47, 277±58 kPa/s, respectively ) of burn serum group, those levels in Ang(1-7) group, and enalaprilat group were decreased obviously(P<0.05 or P <0.01 ), but LVEDP, level of CK and LDH in coronary effluent were increased. Compared with those parameters in burn serum group, CF, LVSP, ±dp/dt max of Ang(1-7) group and enalaprilat group were increased obviously(P<0.05 or P<0.01), and LVEDP, level of CK and LDH in coronary effluent were decreased obviously(P<0.01). Conclusions Ang(1-7) and enalaprilat can effectively improve left ventricular function of isolated rat heart perfused by burn serum and mitigate myocardial injury.     

类固醇类激素联合携带Fas基因重组腺病毒治疗瘢痕疙瘩的体内实验研究

目的应用成功制备的携带人Fas基因的两种重组腺病毒,联合类固醇激素进行瘢痕疙瘩的动物实验研究,判断携带人Fas基因的重组腺病毒与类固醇激素联合治疗瘢痕疙瘩的效果。方法构建瘢痕疙瘩裸鼠模型。使用Ad-Fas(B),Ad-Fas(T)两种构建成功的腺病毒注射及其它辅助治疗手段,实施针对植入裸鼠皮下的瘢痕疙瘩组织的体内治疗方案。通过大体观察,常规病理及电镜观察检测瘢痕疙瘩组织块的变化。结果①单纯使用腺病毒注射后的瘢痕疙瘩组织块体积仅轻度缩小。②前期注射Ad-Fas(B)或Ad-Fas(T)后,使用类固醇激素作为后续治疗因素,其瘢痕疙瘩组织块均明显缩小。③使用腺病毒治疗后,能有效地减少曲安缩松的使用,从而减轻类固醇类激素治疗的副作用。结论①裸鼠为免疫缺陷动物,所以该结果并不能否认病毒的直接治疗作用,在免疫性动物体内直接注射腺病毒的治疗效果尚无结论。②重组腺病毒Ad-Fas(B)及Ad-Fas(T)的瘢痕疙瘩基因治疗的动物实验为瘢痕疙瘩的治疗展示了一条全新的途径。