nm23-H1表达预测大肠癌转移的价值研究

 目的　大肠癌预后取决于是否存在肿瘤转移,目前尚无肯定的观测大肠癌细胞恶性潜能的生物学指标。本研究目的在于探讨nm23-H1作为预测大肠癌转移指标的潜在价值。方法　采用免疫组织化学链霉菌亲合物素蛋白—生物素酶标(SP)方法对58例存档大肠癌标本进行nm23-H1蛋白表达检测,用SSPS统计软件包对nm-H1表达与临床病理参数的关系进行分析。结果　正常大肠粘膜和大肠腺瘤nm23呈阳性表达,62.1%大肠癌组织阳性表达。nm23表达与肿瘤分级、淋巴结及肝转移负相关(P值分别为0.0100,0.2087,0.00376)。nm23阳性表达的大肠癌患者预后好(P=0.0002)。结论　nm23-H1是预测大肠癌细胞转移潜能和预后的敏感指标。     

H(2)O(2) regulates cardiac myocyte phenotype via concentration-dependent activation of distinct kinase pathways

Reactive oxygen species (ROS) can act as signaling molecules to stimulate either hypertrophy or apoptosis in cardiac myocytes. We tested the hypothesis that the phenotypic effects of ROS are due to differential, concentration-dependent activation of specific kinase signaling pathways. Adult rat ventricular myocytes were exposed to H(2)O(2) over a broad concentration range (10-1000 microM). Low concentrations of H(2)O(2) (10-30 microM) increased protein synthesis without affecting survival. Higher concentrations of H(2)O(2) (100-200 microM) increased apoptosis (assessed by TUNEL). Still higher concentrations of H(2)O(2) (300-1000 microM) caused both apoptosis and necrosis. A hypertrophic concentration of H(2)O(2) (10 microM) increased the activity of ERK1/2, but not that of JNK, p38 kinase or Akt. An apoptotic concentration of H(2)O(2) (100 microM) activated JNK, p38 kinase and Akt, and further activated ERK1/2. The MEK1/2 inhibitor U0126 prevented the hypertrophic effect of 10 microM H(2)O(2). The apoptotic effect of 100 microM H(2)O(2) was inhibited bya dominant-negative JNK adenovirus, and was potentiated by U0126 or an Akt inhibitor. Thus, the concentration-dependent effects of ROS on myocyte hypertrophy and growth are due, at least in part, to the differential activation of specific kinase signaling pathways that regulate hypertrophy and apoptosis.     

肾动脉支架置入术对缺血性肾病患者血ET-1,AT-Ⅱ及肾功能的影响

目的 评价肾动脉支架置入术对缺血性肾病患者血压及肾功能的影响及机制探讨.方法 对11例经肾动脉造影确诊为单侧或双侧肾动脉狭窄(管腔内径减少≥70%)的患者行肾动脉支架置入术,比较术前、术后血压、血肌酐(Scr)及内皮素-1(ET-1)、血管紧张素-Ⅱ(AT-Ⅱ)的变化.结果 11例患者置入支架13枚均获成功,术后6月患者的血压4例治愈,6例改善,1例无效,Scr较术前明显下降(P＜0.05);ET-1、AT-Ⅱ自术后3月起即稳定在低水平,与术前比较有显著性差异(P＜0.05,P＜0.01).结论 肾动脉支架置入术有助于缺血性肾病患者的血压控制,改善肾功能;机制与降低血ET-1、AT-Ⅱ有关.     

Digestive cancer management in Asia: Position statements: A report on GI Oncology Summit in 2011

Background and Aim: With the rising incidence of digestive cancers in the Asia Pacific region and the advancement in diagnosis, management and palliation in these conditions, the clinical burden on oncologists is ever increasing. This Summit meeting was called to discuss the optimal management of digestive cancers and the role of Gastroenterologists Method: Experts from Asia Pacific countries in the fields of medical, oncologic, surgical and endoscopic management of cancers in the esophagus, stomach, colon/rectum and the liver reviewed the literature and their practice. 18 position statements were drafted, debated and voted. Results: It was agreed that the burden on GI cancer is increasing. More research will be warranted on chemotherapy, chemoprevention, cost‐effectiveness of treatment and nutrition. Cancer management guidelines should be developed in this region when more clinical data are available. In order to improve care to patients, a multi‐disciplinary team coordinated by a “cancer therapist” is proposed. This cancer therapist can be a gastroenterologist, a surgeon or any related discipline who have acquired core competence training. This training should include an attachment in a center‐of‐excellence in cancer management for no less than 12 months. Conclusion: The management of GI cancer should be an integrated multi‐disciplinary approach and training for GI cancer therapists should be provided for.     

Soluble thrombomodulin levels among women with a history of recurrent pregnancy loss, with or without antiphospholipid antibodies.

The endothelial cells produce substances whose elevated plasma levels acquire predictive value for the development of events. For instance, soluble thrombomodulin (sTM) levels evidence endothelial cell injury. Under specific clinical conditions the levels of sTM are raised, such as in patients with certain autoimmune disorders, pre-eclampsia or antiphospholipid syndrome. The levels of sTM, as an endothelial injury marker, were evaluated in 65 women with a history of recurrent pregnancy loss (12 with autoimmune disorders, 19 pregnant women and nine with a history of gestational hypertension or pre-eclampsia or eclampsia); 13 of them had antiphospholipid antibodies. sTM levels could be used as a predictor of pregnancy loss in future prospective studies. We compared those levels with the levels found in control groups without recurrent pregnancy loss (20 healthy women and 14 women with autoimmune disorder). There were no statistically significant differences (P = 0.729) in the levels of sTM between the recurrent pregnancy loss group (31.1 ng/ml) and the healthy control group (31.4 ng/ml) or between the different subgroups with recurrent pregnancy loss (P = 0.873) and the healthy control group or the control group with autoimmune disorder (28.0 ng/ml). There were no statistically significant differences (P = 0.605) in the levels of sTM among the patients with recurrent pregnancy loss, with or without moderate or high antiphospholipid antibodies (32.0 versus 23.3 ng/ml). Consequently, the levels of sTM would not seem to be a useful tool, as an endothelial injury marker, in women with a history of recurrent pregnancy loss with or without antiphospholipid antibodies.     

Periodontal disease in mothers indicates risk in their children

Introduction.  It is well established that severe periodontitis clusters in families, but there are no data about the relationship between mothers with chronic periodontitis and their children's periodontal status.
Objective.  To evaluate a risk for periodontal diseases in children of periodontally diseased and healthy mothers.
Methods.  Four study groups were included: (I) 20 female patients with untreated generalized severe chronic periodontitis, (II) their children (34), (III) 13 periodontally healthy mothers and (IV) their children (13). Material was collected from years 2004–2006. The clinical examination included registration of visible plaque index, modified gingival index and, bleeding sites on probing. Periodontal microbiological samples were obtained from all study subjects and the isolates were identified according to morphology and biochemical profiles; similar interfamilial pathogens were compared by PCR-technique.
Results.  The children of diseased mothers more frequently had periodontal diseases, especially gingivitis. In addition, clinical parameters of gingival inflammation were more expressed and oral hygiene was worse in this group of children. VPI and VPI% of the diseased and healthy mothers differed significantly. The most common oral pathogens were P. intermedia/nigrescens and A. actinomycetemcomitans . The children of healthy mothers harboured pathogens less frequently than the children of diseased mothers. The sharing of P. intermedia/nigrescens was more frequent (5 families) than A. actinomycetemcomitans (2 families).
Conclusion.  Maternal indicators, such as periodontitis, hygiene habits, and periodontal microflora are risk factors for childhood periodontal diseases, and might be predictive of future childhood and adolescent periodontitis.     

寒区边防军人睡眠异常对战斗力的影响调查

目的：调查研究寒区边防军人睡眠异常对部队战斗力的影响。方法：用EpiData302软件包制成的电子问卷,采用问答的形式进行调查,在军医指导下利用计算机同步填写。结果：226位边防军人中睡眠异常者为187人,占82.7％。按睡眠异常对战斗力的影响前10种情况依次为影响白天精力、影响情绪、影响站岗、影响训练、影响学习、影响体力（下降）、影响比赛、影响出操、影响食欲、影响思维。结论：边防军入睡眠异常不容忽视,对部队战斗力产生着不良影响。