糖尿病大鼠视网膜基因表达谱差异的初步分析

目的 建立大鼠正常视网膜和糖尿病8周视网膜基因表达谱，比较两者差异，初步分析糖尿病视网膜病变的相关基因。方法 通过限制片段差异显示 PCR（ restriction fragments differential display-PCR，RFDD-PCR）获得正常大鼠视网膜及8周糖尿病大鼠视网膜组织转录组片段。应用Fraent Analysis等软件，对差异片段进行生物信息学分析，初步确定糖尿病视网膜病变相关基因／表达序列标签（ expression sequence tag, Ksr）。结果 获得有意义的片段共3639个，有差异的片段840个，占表达数的23．08％。其中包括5个视觉传导相关基因，13个兴奋性神经递质受体基因和3个抑制性神经递质受体基因。糖尿病8周大鼠视网膜Rhodopsin kinase,β-arrestin,Phosducin, rod photoreceptor cGMP-gated channel 和 Rpe65的表达下调，离子型谷氨酸受体iGluR1-4下调，代谢性谷氨酸受体及γ-氨基丁酸受体各亚型则普遍上调，而甘氨酸受体表达无变化。结论 糖尿病8周大鼠神经视网膜已受到累及，其基因表达模式的改变，可能与糖尿病早期视功能损害有关。     

Localization of CEA,HCG, Lysozyme,alpha-1-antitrypsin,and alpha-1-antichymotrypsin in gastric cancer and prognosis

Summary Carcinoembryonic antigen (CEA),-human chorionic gonadotropin (HCG), alpha-1-antichymotrypsin (ACT), alpha-1-antitrypsin (AAT) and Lysozyme (LYS) were traced by immunoperoxidase staining in gastric carcinomas. The immunohistological results were evaluated in relation to histological types (WHO and Laurén), stage of disease, grade and survival time. CEA was demonstrated in 96% of the tumours, HCG in 34%, ACT in 78%, AAT in 42%, and LYS in 71%. Comparing the staining patterns of the antigens and the intensity of staining some differences were notable. Except for signet-ring cell carcinomas, all of which were intensively positive, CEA expression decreased significantly with loss of differentiation. This observation was not seen with the other marker substances. None of the tested markers was characteristic for one particular histological type, nor could they be correlated with the tumour stage or grade. The marker positivity of CEA, ACT and LYS was not related to survival time. For HCG only, a correlation between tissue expression and a restricted survival time was established. Patients with AAT positive carcinomas had a significantly better survival probability.     

Paternal mosaicism for a novel PBX1 mutation associated with recurrent perinatal death: Phenotypic expansion of the PBX1‐related syndrome

Autosomal dominant (de novo) mutations in PBX1 are known to cause congenital abnormalities of the kidney and urinary tract (CAKUT), with or without extra‐renal abnormalities. Using trio exome sequencing, we identified a PBX1 p.(Arg107Trp) mutation in a deceased one‐day‐old neonate presenting with CAKUT, asplenia, and severe bilateral diaphragmatic thinning and eventration. Further investigation by droplet digital PCR revealed that the mutation had occurred post‐zygotically in the father, with different variant allele frequencies of the mosaic PBX1 mutation in blood (10%) and sperm (20%). Interestingly, the father had subclinical hydronephrosis in childhood. With an expected recurrence risk of one in five, chorionic villus sampling and prenatal diagnosis for the PBX1 mutation identified recurrence in a subsequent pregnancy. The family opted to continue the pregnancy and the second affected sibling was stillborn at 35 weeks, presenting with similar severe bilateral diaphragmatic eventration, microsplenia, and complete sex reversal (46, XY female). This study highlights the importance of follow‐up studies for presumed de novo and low‐level mosaic variants and broadens the phenotypic spectrum of developmental abnormalities caused by PBX1 mutations.     

The hormonal responses to repetitive brief maximal exercise in humans

Summary The responses of nine men and nine women to brief repetitive maximal exercise have been studied. The exercise involved a 6-s sprint on a non-motorised treadmill repeated 10 times with 30 s recovery between each sprint. The total work done during the ten sprints was 37,693±3,956 J by the men and 26,555±4,589 J by the women (M > F,P<0.01). This difference in performance was not associated with higher blood lactate concentrations in the men (13.96± 1.70 mmol·^–1) than the women (13.09±3.04 mmol·l^–1). An 18-fold increase in plasma adrenaline (AD) occurred with the peak concentration observed after five sprints. The peak AD concentration in the men was larger than that seen in the women (9.2 +- 7.3 and 3.7 ± 2.4 nmol · l^–1 respectively,P<0.05). The maximum noradrenaline (NA) concentration occurred after ten sprints in the men (31.6±10.9 nmol·l^–1) and after five sprints in the women (27.4 ± 20.8 nmol · l^–1). Plasma cardiodilatin (CDN) and atrial natriuretic peptide (ANP) concentrations were elevated in response to the exercise. The peak ANP concentration occurred immediately postexercise and the response of the women (10.8 ± 4.5 pmol · l^–1 was greater than that of the men (5.1 ± 2.6 pmol · l^–1,P<0.05). The peak CDN concentrations were 163 ± 61 pmol · l^–1 for the women and 135 ± 61 pmol · l^–1 for the men. No increases in calcitonin gene related peptide (CGRP) were detected in response to the exercise. These results indicate differences between men and women in performance and hormonal responses. There was no evidence for a role of CGRP in the control of the cardiovascular system after brief intermittent maximal exercise.     

Proanthocyanidins and Flavan-3-ols in the Prevention and Treatment of Periodontitis—Immunomodulatory Effects,Animal and Clinical Studies

This paper continues the systematic review on proanthocyanidins and flavan-3-ols in the prevention and treatment of periodontal disease and covers the immunomodulatory effects, and animal- and clinical studies, while the other part discussed the direct antibacterial properties. Inflammation as a major response of the periodontal tissues attacked by pathogenic microbes can significantly exacerbate the condition. However, the bidirectional activity of phytochemicals that simultaneously inhibit bacterial proliferation and proinflammatory signaling can provide a substantial alleviation of both cause and symptoms. The modulatory effects on various aspects of inflammatory and overall immune response are covered, including confirmed and postulated mechanisms of action, structure activity relationships and molecular targets. Further, the clinical relevance of flavan-3-ols and available outcomes from clinical studies is analyzed and discussed. Among the numerous natural sources of flavan-3-ols and proanthocyanidins the most promising are, similarly to antibacterial properties, constituents of various foods, such as fruits of Vaccinium species, tea leaves, grape seeds, and tannin-rich medicinal herbs. Despite a vast amount of in vitro and cell-based evidence of immunomodulatory there are still only a few animal and clinical studies. Most of the reports, regardless of the used model, indicated the efficiency of these phytochemicals from cranberries and other Vaccinium species and tea extracts (green or black). Other sources such as grape seeds and traditional medicinal plants, were seldom. In conclusion, the potential of flavan-3-ols and their derivatives in prevention and alleviation of periodontal disease is remarkable but clinical evidence is urgently needed for issuing credible dietary recommendation and complementary treatments.     

Role of Cachexia and Fragility in the Patient Candidate for Cardiac Surgery

Frailty is the major expression of accelerated aging and describes a decreased resistance to stressors, and consequently an increased vulnerability to additional diseases in elderly people. The vascular aging related to frail phenotype reflects the high susceptibility for cardiovascular diseases and negative postoperative outcomes after cardiac surgery. Sarcopenia can be considered a biological substrate of physical frailty. Malnutrition and physical inactivity play a key role in the pathogenesis of sarcopenia. We searched on Medline (PubMed) and Scopus for relevant literature published over the last 10 years and analyzed the strong correlation between frailty, sarcopenia and cardiovascular diseases in elderly patient. In our opinion, a right food intake and moderate intensity resistance exercise are mandatory in order to better prepare patients undergoing cardiac operation.     

基于疾病诊断相关组的医院内专科评价指标探讨

目的通常疾病诊断相关组(DRGs)指标用于评价综合医院的能力,当用于医院内部评价时,因专科差异较大,现有指标不宜直接用于临床专科比较。本文拟探讨DRGs指标体系应用于医院内评价的问题,并提出专科能力指数及其计算方法。方法以某院2018年DRGs分组结果及该院所在省份DRGs数据,论证现有DRGs指标体系应用于医院内专科评价存在的问题,并提出新评价指标——专科能力指数以对临床科室进行比较与评价。结果新指标能有效地弥补DRGs指标体系在医院内评价临床科室时存在“不可比”的问题,能在一定程度上反映临床科室的专科能力。结论基于DRGs的专科能力指数不仅使得各临床科室具有可比性,且能在一定程度上反映临床科室的医疗服务综合能力。     

郑州市小学生行为问题调查及家庭相关影响因素分析

目的 分析郑州市小学生行为问题状况及其家庭相关影响因素,为有针对性的开展小学生行为问题的干预提供借鉴和依据。方法 于2019年6月在郑州市5个行政辖区12所小学整群随机抽取3 180名小学生,使用Conners 父母症状问卷(PSQ)和自行设计的儿童一般情况问卷进行评定,并进行统计学分析。结果 发放问卷3 180份,合格资料3 063份,有效率为96.3%,行为问题检出者588人(19.2%);其中男生1 669人,检出行为问题者349人(20.9%),女生1 394人,检出行为问题者248人(17.8%),差异有统计学意义(χ²=4.646,P=0.031)。与六年级儿童相比,五、四、二、一年级儿童发生行为问题的危险性增高[OR值(95% CI)分别为0.617(0.449~0.846)、0.633(0.474~0.845)、0.377(0.263~0.540)、0.281(0.204~0.388,P<0.01)]。与父亲沉溺网络相比,父亲不沉溺网络的儿童发生行为问题危险性降低(OR=0.647,95%CI=0.498~0.840,P＝0.001);与母亲职业是干部的儿童相比,母亲职业是教师、农民的儿童发生行为问题的危险性降低[OR值(95% CI)分别为0.578(0.342~0.977)、0.349(0.219~0.555),P<0.05 or <0.01)]。结论 郑州市小学生行为问题检出率较高,需要进一步关注;性别、年级、父亲是否沉溺网络和母亲职业均是郑州市小学生行为问题发生的影响因素。     

2型糖尿病中医辨证分型与血浆内皮素及降钙素基因相关肽研究

为探讨 2型糖尿病中医辨证分型与血浆内皮素及降钙素基因相关肽的关系 ,检测血浆内皮素 ( ET)及降钙素基因相关肽 ( CGRP)含量 ,分析其与中医各证型的关系。结果显示 :1糖尿病各型患者血浆 ET值均较正常对照组明显增高 ,其中血瘀气滞组 >阴阳两虚组 >气阴两虚组和阴虚热盛组 ,而气阴两虚组与阴虚热盛组之间无明显差异。2糖尿病各型患者血 CGRP值均较正常对照组明显下降 ,其中血瘀气滞组和阴阳两虚组 <气阴两虚组 <阴虚热盛组 ,而血瘀气滞组与阴阳两虚组之间无明显差异。说明糖尿病患者中医辨证各证型的微观机制及病程演变与血管内皮细胞功能、肽能神经功能的变化密切相关