心室肌脂肪:一个意想不到的远期生存生物标志物?

正目的非增强CT常常观察到心肌脂肪,但对其认识不足,本文旨在探究心肌内脂肪与全因死亡率的关系,无论是否有心肌梗死病史。方法本回顾性队列研究收集了不     

3种沙眼衣原体POCT检测试剂盒性能评估

目的对3种不同厂家的商品化沙眼衣原体即时检测(POCT)试剂盒进行评估,为中国医学科学院北京协和医院检验科实验室及其他医疗机构实验室提供参考。方法采用沙眼衣原体菌株(血清型D和E)冻存毒株,化冻后经细胞培养法滴定确定浓度,使用生理盐水进行系列稀释,对试剂盒A(衣原体抗原检测试剂盒)、试剂盒B(沙眼衣原体抗原检测试剂盒)、试剂盒C(沙眼衣原体抗原检测试剂盒)进行最低检出限和重复性实验。采用人胚肺成纤维细胞、非洲绿猴肾细胞系、大肠埃希菌标准菌株菌悬液进行特异度实验。结果对血清型D的最低检出限,试剂盒B和C浓度均达1.86×10~7 IFU/mL,试剂盒B在1.86×10~6 IFU/mL观察到隐约可见条带;试剂盒A仅能检测到1.86×10~9 IFU/mL。对血清型E检测灵敏度,试剂盒B和C均达2.80×10~7IFU/mL,但均为弱阳性;试剂盒A仅能检测到2.80×10~9 IFU/mL。3种试剂盒均有较好的重复性,但均存在阳性条带显示颜色强弱不完全一致的情况。3种试剂盒均能够抗人胚肺成纤维细胞MRC-5(2.9×10~6/mL),非洲绿猴肾细胞系BGMK(5.0×10~6/mL)和标准菌株ATCC25922大肠埃希菌(1.5×10~8 CFU/mL)的干扰。结论试剂盒B和C最低检出限明显优于试剂盒A,但试剂盒B较试剂盒C略好。在特异度和重复性方面3种试剂盒均较好。     

美国≥65岁女性的数字二维乳腺摄影与断层成像对比

正摘要虽然乳腺癌的发病率和死亡率随着年龄的增长而增加,但有关老年妇女筛查乳腺X线检查的益处和风险,以及老年妇女二维数字乳腺X线摄影(DM)和数字乳腺断层成     

Inhibition of focal adhesion kinase enhances antitumor response of radiation therapy in pancreatic cancer through CD8+ T cells

Objective:Pancreatic ductal adenocarcinoma(PDAC)is a deadly malignancy,due in large part to its resistance to conventional therapies,including radiotherapy(RT).Despite RT exerting a modest antitumor response,it has also been shown to promote an immunosuppressive tumor microenvironment.Previous studies demonstrated that focal adhesion kinase inhibitors(FAKi)in clinical development inhibit the infiltration of suppressive myeloid cells and T regulatory(T regs)cells,and subsequently enhance effector T cell infiltration.FAK inhibitors in clinical development have not been investigated in combination with RT in preclinical murine models or clinical studies.Thus,we investigated the impact of FAK inhibition on RT,its potential as an RT sensitizer and immunomodulator in a murine model of PDAC.Methods:We used a syngeneic orthotopic murine model to study the effect of FAKi on hypofractionated RT.Results:In this study we showed that IN10018,a small molecular FAKi,enhanced antitumor response to RT.Antitumor activity of the combination of FAKi and RT is T cell dependent.FAKi in combination with RT enhanced CD8+T cell infiltration significantly in comparison to the radiation or FAKi treatment alone(P<0.05).FAKi in combination with radiation inhibited the infiltration of granulocytes but enhanced the infiltration of macrophages and T regs in comparison with the radiation or FAKi treatment alone(P<0.01).Conclusions:These results support the clinical development of FAKi as a radiosensitizer for PDAC and combining FAKi with RT to prime the tumor microenvironment of PDAC for immunotherapy.     

Significant impact of cryopreserved amniotic membrane on acute ocular Stevens-Johnson syndrome and toxic epidermal necrolysis

The ocular surface is covered by an epithelium encompassing an area including the cornea,the limbus and the conjunctiva bordered by the upper and lower lids.The healthy state of the ocular surface epithelium depends on a stable and protective preocular tear film when the eye is open.A stable preocular tear film is governed by sound ocular surface defense that involves effective neuroanatomic integration of compositional and hydrodynamic factors by two neural reflexes (1).     

Reduced anoctamin 7(ANO7) expression is a strong and independent predictor of poor prognosis in prostate cancer

Objective:Anoctamin 7(ANO7)is a calcium2+-dependent chloride ion channel protein.Its expression is restricted to prostate epithelial cells.The exact function is unknown.This study aimed to analyze ANO7 expression and its clinical significance in prostate cancer(PCa).Methods:ANO7 expression was assessed by immunohistochemistry in 17,747 clinical PCa specimens.Results:ANO7 was strongly expressed in normal prostate glandular cells but often less abundant in cancer cells.ANO7 staining was interpretable in 13,594 cancer tissues and considered strong in 34.4%,moderate in 48.7%,weak in 9.3%,and negative in 7.6%.Reduced staining was tightly linked to adverse tumor features[high classical and quantitative Gleason grade,lymph node metastasis,advanced tumor stage,high Ki67 labeling index,positive surgical margin,and early biochemical recurrence(P<0.0001 each)].The univariate Cox hazard ratio for prostate-specific antigen(PSA)recurrence after prostatectomy in patients with negative vs.strong ANO7 expression was 2.98(95%confidence interval 2.61–3.38).The prognostic impact was independent of established pre-or postoperatively available parameters(P<0.0001).Analysis of annotated molecular data showed that low ANO7 expression was linked to TMPRSS2:ERG fusions(P<0.0001),elevated androgen receptor expression(P<0.0001),as well as presence of 9 of 11 chromosomal deletions(P<0.05 each).A particularly strong association of low ANO7 expression with phosphatase and tensin homolog(PTEN)deletion may indicate a functional relationship with the PTEN/AKT pathway.Conclusions:These data identify reduced ANO7 protein expression as a strong and independent predictor of poor prognosis in PCa.ANO7 measurement,either alone or in combination,might provide clinically useful prognostic information in PCa.     

Glial regenerative response in the imaginal discs of Drosophila melanogaster

<正>Glial cells play a key role during nervous system development and actively participate in all the cellular processes involved in maintaining its structural robustness and functional plasticity.In response to neuronal damage,glial cells proliferate,migrate to the injured region and change their morphology,function,and behavior     

Tandem pore TWIK-related potassium channels and neuroprotection

TWIK-related potassium channels(TREK) belong to a subfamily of the two-pore domain potassium channels family with three members, TREK1, TREK2 and TWIK-related arachidonic acid-activated potassium channels. The two-pore domain potassium channels is the last big family of channels being discovered, therefore it is not surprising that most of the information we know about TREK channels predominantly comes from the study of heterologously expressed channels. Notwithstanding, in this review we pay special attention to the limited amount of information available on native TREK-like channels and real neurons in relation to neuroprotection. Mainly we focus on the role of free fatty acids, lysophospholipids and other neuroprotective agents like riluzole in the modulation of TREK channels, emphasizing on how important this modulation may be for the development of new therapies against neuropathic pain, depression, schizophrenia, epilepsy, ischemia and cardiac complications.     

多参数MR成像全肿瘤直方图分析三阴性乳腺癌与其他亚型的鉴别

正摘要目的利用多参数MR成像图谱和全肿瘤直方图分析三阴性(TN)乳腺癌与其他分子亚型鉴别的影像学生物标志。方法本回顾性研究包括134例浸润性导管癌病人。从     

慢性血栓栓塞性肺动脉高压病人在球囊血管成形术前后的肺灌注血容量CT、肺灌注SPECT、肺血管造影的临床及预测价值比较

正摘要目的使用双能量CT计算肺灌注血容量(PBV)诊断肺血栓栓塞已被广泛接受。本研究评价慢性血栓栓塞性肺高压(CTEPH)病人在球囊肺血管成形术(BPA)前、后的肺