Inhibition of Na(+)/H(+) isoform-1 exchange protects hearts perfused after 6-hour cardioplegic cold storage.

OBJECTIVES: Cardiac ischemia-reperfusion activates Na(+)/H(+) exchange; excess Na(+) and the resulting Ca(2+) overload, through reverse Na(+)/Ca(2+) exchange, cause cellular injury and cardiac dysfunction. We postulated that inhibiting the Na(+)/H(+) isoform-1 exchanger would add to the protection of hearts after long-term cold storage in acidic cardioplegic solution. METHODS: Guinea pig hearts were isolated and perfused at 37 degrees C with Krebs-Ringer's solution (KRS) and then switched to an acidic St. Thomas solution (STS) at 25 degrees C. Perfusion was stopped at 10 degrees C, and hearts were stored for 6 hours in STS at 3.4 degrees C. On reperfusion to 25 degrees C, hearts were perfused with KRS for 60 minutes. Hearts were divided into 4 groups: sham control (SHAM); eniporide (EPR, EMD96785) IV, 1 mg/kg given IV over 15 minutes before heart isolation; EPR intracoronary, 1 micromol/liter in STS given intracoronary after heart isolation; and EPR IV and intracoronary. RESULTS: Values at 60 minutes reperfusion (the percentage of control [100%] before cold storage) are given, respectively, for EPR IV, EPR intracoronary, and EPR IV and intracoronary vs drug-free SHAM (SEM, *p < 0.05 vs SHAM): 72% +/- 3%*, 65% +/- 3%*, and 81% +/- 2%* vs 55% +/- 3% for left ventricular pressure; 94% +/- 3%*, 96% +/- 5%*, and 102% +/- 2%* vs 81% +/- 3% for coronary flow; 60% +/- 2%, 58% +/- 3%, and 74%* +/- 3% vs 58% +/- 4% for cardiac efficiency; 106% +/- 2%*, 108% +/- 3%*, and 107% +/- 2%* vs 116% +/- 4% for percentage of O(2) extraction. Infarct size as percentage of ventricular weight was 20% +/- 3%*, 31% +/- 3%, and 6% +/- 2%* vs 35% +/- 3% (SHAM) after 60 minutes of reperfusion. CONCLUSIONS: Na(+)/H(+) isoform-1 exchanger inhibition, particularly if given IV before storage and intracoronary during cooling and rewarming, adds to the protection of cardioplegic solutions.     

Biomechanical comparison of effects of supraspinatus tendon detachments,tendon defects,and muscle retractions

BACKGROUND: Rotator cuff ruptures are frequently associated with loss of strength of the shoulder. However, the characteristics of the rotator cuff tear that are responsible for the loss of force generation and transmission have not yet been identified. The purpose of this study was to compare the effects of supraspinatus tendon detachments, tendon defects, and muscle retractions on in vitro force transmission by the rotator cuff to the humerus. METHODS: The rotator cuff tendons from ten cadaver shoulders were loaded proportionally to the respective cross-sectional areas of their muscles. A fiberglass rod was cemented into the medullary canal of the humerus and connected to a three-component load cell for the measurement of the forces transmitted by the rotator cuff to the humerus. This study was performed with the humerus in a hanging arm position and with various sizes of supraspinatus tendon detachments, tendon defects, and muscle retractions. RESULTS: Detachment or creation of a defect involving one-third or two-thirds of the supraspinatus tendon resulted in a minor reduction in the force transmitted by the rotator cuff (< or =5%), while detachment or creation of a defect involving the whole tendon resulted in a moderate reduction (11% and 17%, respectively). Simulated muscle retraction involving one-third, two-thirds, and the whole tendon resulted in losses of torque measuring 19%, 36%, and 58%, respectively. Side-to-side repair of the one-third and two-thirds defects nearly restored the force transmission capability, whereas a deficit remained after side-to-side repair following complete resection. CONCLUSIONS: Our results support the rotator cable concept and correspond to the clinical observation that patients with a small rupture of the rotator cuff may present without a loss of shoulder strength. Muscle retraction is potentially an important factor responsible for loss of shoulder strength following large rotator cuff ruptures. Clinical Relevance: Supraspinatus muscle retraction diminishes glenohumeral abduction torque significantly more than either a defect in the tendon or a simple detachment of the tendon from the tuberosity. In cases of irreparable defects, side-to-side repair may be worthwhile to restore muscle tension and the integrity of the rotator cable.     

Ender钉并钢丝环扎治疗股骨转子下骨折

我院从1989年～1999年应用Ender钉并钢丝环扎切开复位内固定治疗转子下骨折69例,平均随访1.5年,全部病例均获骨性愈合,疗效满意,并发症较少,现报告如下.     

Y染色体微缺失与男性不育研究进展

约 10 %～ 15 %原因不明的无精子症和 5 %～ 10 %严重少精子症存在Y染色体AZF微缺失 ,该不育人群借助ICSI技术可产生子代 ,但同时可将微缺失垂直传播给男性后代引起不育。本文从Y染色体微缺失的频率位置、基因型和表型的关系、缺失的来源机制、检测手段、助孕技术与其关系等几个方面予以综述 ,以进一步理解男性不育的原因 ,从而为诊断、治疗提供一条新途径     

扩大壁细胞迷走神经切断术治疗十二指肠溃疡及其并发症

目的：评价扩大壁细胞迷走神经切断术（EPCV）治疗十二指肠溃疡及其并发症的远期临床疗效。方法：采用EPCV共治疗十二指肠溃疡及其并发症321例。其中慢性溃疡56例,并发急性穿孔204例,出血21例,狭窄40例。评价内容包括：术后并发症发生率、胃酸分泌功能、胃排空功能、胃镜和上消化道钡餐检查、营养状态、Visick分级。结果：全组321例患者中289例获得随访,随访率为90%,随访期为0.5-22.0年,平均为11.3年。全组无手术死亡,无纵隔炎和倾倒综合征发生。发生粘连性肠梗阻4例（1.4%）,进食后上腹胀19例（6.5%）,返酸17例（5.8%）,总的溃疡复发16例（5.5%）,其中慢性十二指肠溃疡为19.5%,出血为0,狭窄为5.3%,穿孔为3.1%。16例复发溃疡经内科药物治疗后溃疡愈合10例,其余6例经胃部分切除或胃窦切除痊愈。EPCV总的优良率（VisickⅠ和Ⅱ级）为91.7%,其中穿孔为95.3%,效果最佳。结论：EPCV具有手术操作简便、术后并发症较少、溃疡复发率低、术后远期患者营养状况良好、生活质量较高的特点,疗效优良。EPCV术是治疗十二指肠溃疡及其并发急性穿孔、出血和狭窄首选的安全有效术式。     

Cellular basis of diabetic nephropathy: 1. Study design and renal structural-functional relationships in patients with long-standing type 1 diabetes.

This study was designed to elucidate the cellular basis of risk of or protection from nephropathy in patients with type 1 diabetes. Entry criteria included diabetes duration of > or =8 years (mean duration, 22.5 years) and glomerular filtration rate (GFR) >30 ml x min(-1) x 1.73 m(-2). Patients were classified, on the basis of the estimated rate of mesangial expansion, as "fast-track" (upper quintile) or "slow-track" (lower quintile). A total of 88 patients were normoalbuminuric, 17 were microalbuminuric, and 19 were proteinuric. All three groups had increased glomerular basement membrane (GBM) width and mesangial fractional volume [Vv(Mes/glom)], with increasing severity from normoalbuminuria to microalbuminuria to proteinuria but with considerable overlap among groups. Vv(Mes/glom) (r = 0.75, P < 0.001) and GBM width (r = 0.63, P < 0.001) correlated with albumin excretion rate (AER), whereas surface density of peripheral GBM per glomerulus [Sv(PGBM/glom)] (r = 0.50, P < 0.001) and Vv(Mes/glom) (r = -0.48, P < 0.001) correlated with GFR. Vv(Mes/glom) and GBM width together explained 59% of AER variability. GFR was predicted by Sv(PGBM/glom), AER, and sex. Fast-track patients had worse glycemic control, higher AER, lower GFR, more hypertension and retinopathy, and, as expected, worse glomerular lesions than slow-track patients. Thus, there are strong relationships between glomerular structure and renal function across the spectrum of AER, but there is considerable structural overlap among AER categories. Given that normoalbuminuric patients may have advanced glomerulopathy, the selection of slow-track patients based on glomerular structure may better identify protected patients than AER alone.     

Apogossypolone, a novel inhibitor of anfiapoptotic Bcl-2 family proteins, induces autophagy of PC-3 and LNCaP prostate cancer cells in vitro

Limited treatment options are available for aggressive prostate cancer. Gossypol has been reported to have a potent anticancer activity in many types of cancer. It can increase the sensitivity of cancer cells to alkylating agents, diminish multidrug resistance and decrease metastasis. Whether or not it can induce autophagy in cancer cells has not yet been determined. Here we investigated the antiproliferative activity of apogossypolone （ApoG2） and （-）-gossypol on the human prostate cancer cell line PC3 and LNCaP in vitro. Exposure of PC-3 and LNCaP cells to ApoG2 resulted in several specific features characteristic of autophagy, including the appearance of membranous vacuoles in the cytoplasm and formation of acidic vesicular organelles. Expression of autophagy-associated LC3-Ⅱ and beclin-1 increased in both cell lines after treatment. Inhibition of autophagy with 3-methyladenine promoted apoptosis of both cell types. Taken together, these data demonstrated that induction of autophagy could represent a defense mechanism against apoptosis in human prostate cancer cells.     

Functional urinary and fecal incontinence in neurologically normal children: symptoms of one 'functional elimination disorder'?

OBJECTIVE: To clarify the relationship between disordered defecation and non-neuropathic bladder-sphincter dysfunction (NNBSD) by comparing the prevalence of symptoms of disordered defecation in children with NNBSD before and after treatment for urinary incontinence (UI), and assessing the effect of such symptoms on the cure rate for UI. PATIENTS AND METHODS: In the European Bladder Dysfunction Study, a prospective multicentre study comparing treatment plans for children with NNBSD, 202 children completed questionnaires on voiding and on defecation, at entry and after treatment for UI. Four symptoms of disordered defecation were evaluated; low defecation frequency, painful defecation, fecal soiling, and encopresis. RESULTS: At entry, 17 of the 179 children with complete data sets had low defecation frequency and/or painful defecation (9%), classified as functional constipation (FC). Of the 179 children, 57 had either isolated fecal soiling or soiling with encopresis (32%), classified as functional fecal incontinence (FFI). After treatment for UI, FFI decreased to 38/179 (21%) (statistically significant, P = 0.035); for FC there were too few children for analysis. After treatment for UI, 19 of the 179 children (11%) reported de novo FFI. Symptoms of disordered defecation did not influence the cure rate of treatment for UI. CONCLUSIONS: FFI improved significantly after treatment for UI only, but not in relation to the outcome of such treatment. FFI did not influence the cure rate for UI. There was little to support a causal relation between disordered defecation and NNBDS ('functional elimination syndrome').     

3种肠道清洁方法效果比较

目的 探讨顺产儿脐部护理中修剪法配合Orem自理模式的应用效果。方法 将100名顺产新生儿随机分为对照组和观察组各50名。对照组按常规进行脐部护理；观察组择期行脐部修剪，同时根据Orem自理模式进行全补偿、部分补偿及支持一教育护理模式进行护理。观察两组脐带出血、脱落及疑似感染情况。结果 两组均未出现脐带出血情况；两组出生后9d回访时脐带脱落比较，差异有显著性意义（P〈0．05）。结论 修剪法配合Orem自理模式进行脐部护理，能促进新生儿脐带早脱落。     

肛瘘肛周脓肿术后应用复方角菜酸脂乳膏的效果分析

目的:观察复方角菜酸脂乳膏对肛瘘和肛周脓肿术后治疗的效果,寻找一种安全有效的术后换药药物.方法:将188例后位单纯性肛瘘或肛周脓肿一次性根治术后患者,分为复方角菜酸脂乳膏治疗组和中药换药对照组,对其愈合时间和并发症进行对比观察.结果:复方角菜酸脂乳膏在肛瘘或肛周脓肿术后伤口的促进愈合和减低并发症发生等方面优于传统中药换药(P＜0.01).结论:复方角菜酸脂乳膏是一种安全、有效的肛瘘和肛周脓肿术后换药药物,尤其在纤维增殖期(中期)、上皮覆盖期(后期)作用明显,具有明显的镇痛、促进愈合作用,并有效防止湿疹的出现.