微型心电监视仪的研制

本文介绍我们近年研制成功的一种全新的微型化的心电监视仪。该仪器集主机，显示器，电极导联于一体，适合医务人员随身携带，用于需要快速、简易、准确地获取人体心电图形与心率数据的场合。     

超抗原SEA抗肿瘤研究进展

超抗原是指一些细菌或病毒编码的蛋白分子，只需极低浓度即可激活大量的淋巴细胞克隆．作为一种强大的T细胞激活剂，超抗原成为肿瘤免疫治疗研究的热点之一．本文对其特性及目前的研究进展作一综述．     

2型糖尿病及其血管并发症患者血清ACE活性的变化

This investigation was made with reference to the changes of serum angiotensin converting enzyme (SACE) activity in type 2 diabetes and its vascular complications. SACE activity was studied in 127 type 2 diabetic patients and 90 healthy persons by using a spectrophotometric assay. The results showed SACE activity was obviously higher in diabetic patients (459.51 +/- 175.85 U) than in healthy persons (321.14 +/- 121.27 U); SACE activity was significantly higher in type 2 diabetic patients with diabetic nephropathy (548.27 +/- 166.60 U) than in patients without diabetic nephropathy (383.2 +/- 139.00 U), but there was no difference between patients with microalbuminuria and macroalbuminuria; no statistical difference was detected in SACE activity between diabetic patients with diabetic retinopathy (465.64 +/- 178.93 U) and without retinopathy (449.07 +/- 170.04 U); SACE activity was not associated with the course of diabetes, blood pressure, blood lipid and blood glucose. These data suggest that raised SACE activity might only play a role in the initiation of type 2 diabetes and diabetic nephropathy, but not relate to the progress of diabetic nephropathy, the onset of diabetic retinopathy and hypertension.     

脑外伤后脑干组织中血管内皮细胞及血浆蛋白分布改变的免疫？…

目的:探讨脑外伤后脑干组织中血脑屏障和神经细胞的病理学改变.方法:采用免疫组化染色显示人体脑干组织中的血管内皮细胞(CD31)和某些血浆蛋白(白蛋白及 IgM).结果:1.在正常脑干组织中, CD31阳性物呈连续的线条状,围成规则的血管腔,其周围无明显间隙;血浆蛋白位于血管内,未见到血浆/蛋白阳性神经细胞或神经纤维.2.脑外伤后,脑干中的 CD31阳性物呈不规则弯曲的小片段状,围成不规则的血管腔,其周围间隙明显增宽;同时可见到白蛋白及IgM阳性神经细胞和神经纤维.结论:脑外伤后,脑干组织中的血脑屏障受到了破坏,而且神经细胞也有不同程度的损伤.     

外周动静脉同步换血对血清钙的影响

目的：探讨外周动静脉同步换血对血清钙的影响。方法：对２５全高胆红素血症患儿采用同型血进行外周动静脉同步换血,换血前后在同一动脉端取血测血清钙。结果：换血过程中应用钙剂组（观察组）与未应用钙剂组,血钙水平在换血前后及两组之间均无差异,Ｐ〉０．０５。注射钙剂的不良反应发生率为６．２５％。结论：外周动静脉同步换血疗法对血清钙无明显影响,换血过程中静注钙剂是不必要的。     

退变性腰椎管狭窄症手术治疗的探讨

目的：探讨退变性腰椎管狭窄症的手术治疗。方法：对９４例６０岁以上患者进行分型和手术治疗。结果：将本病分为Ⅰ型（侧隐窝狭窄型）;Ⅱ型（中央管狭窄型）;Ⅲ型（混合型）。对Ⅰ型手术方式采用单侧或双侧椎板开窗,扩大神经根管或（和）摘除髓核;对Ⅱ型行半椎板或全椎板切除术;对Ⅲ型行全椎板切除术。结论：通过术后疗效观察和３年随访,根据分型的不同选择不同的手术方式,可达到较好的临床疗效     

Methamphetamine administration causes overexpression of nNOS in the mouse striatum

The accumulated evidence suggests that the overproduction of nitric oxide (NO) is involved in methamphetamine (METH)-induced neurotoxicity. Using NADPH-diaphorase histochemistry, neuronal nitric oxide synthase (nNOS) and inducible nitric oxide synthase (iNOS) antibody immunohistochemistry, the possible overexpression of nNOS and iNOS was investigated in the brains of mice treated with METH. The number of positive cells or the density of positive fibers was assessed at 1 h, 24 h and 1 week after METH injections. There were no clear positive iNOS cells and fibers demonstrated in the brains of mice after METH treatment. In contrast, METH caused marked increases in nNOS in the striatum and hippocampus at 1 and 24 h post-treatment. The nNOS expression normalized by 1 week. There were no statistical changes in nNOS expression in the frontal cortex, the cerebellar cortex, nor in the substantia nigra. These results provide further support for the idea that NO is involved in the neurotoxic effects of METH.     

Satellite-cell-derived nerve growth factor and neurotrophin-3 are involved in noradrenergic sprouting in the dorsal root ganglia following peripheral nerve injury in the rat

Injury to a peripheral nerve induces in the dorsal root ganglia (DRG) sprouting of sympathetic and peptidergic terminals around large-diameter sensory neurons that project in the damaged nerve. This pathological change may be implicated in the chronic pain syndromes seen in some patients with peripheral nerve injury. The mechanisms underlying the sprouting are not known. Using in situ hybridization and immunohistochemical techniques, we have now found that nerve growth factor (NGF) and neurotrophin-3 (NT3) synthesis is upregulated in satellite cells surrounding neurons in lesioned DRG as early as 48 h after nerve injury. This response lasts for at least 2 months. Quantitative analysis showed that the levels of mRNAs for NT3 and NGF increased in ipsilateral but not contralateral DRG after nerve injury. Noradrenergic sprouting around the axotomized neurons was associated with p75-immunoreactive satellite cells. Further, antibodies specific to NGF or NT3, delivered by an osmotic mini-pump to the DRG via the lesioned L5 spinal nerve, significantly reduced noradrenergic sprouting. These results implicate satellite cell-derived neurotrophins in the induction of sympathetic sprouting following peripheral nerve injury.