简介:摘要抗γ-氨基丁酸B型(γ-aminobutyric acid B,GABAB)受体脑炎是以中枢神经系统神经元细胞表面GABAB受体为靶点的自身免疫性脑炎,多数为副肿瘤性,以难治性癫痫、认知功能下降和精神行为障碍等为常见临床表现。但目前抗GABAB受体脑炎的确切机制尚不明确,文章对抗GABAB受体脑炎机制的最新研究进展作一综述。
简介:AbstractObjective:The plant polyphenol resveratrol (3,4′,5-trihydroxystilbene) (RSV) has been proposed for use because of its protective effect on ultraviolet (UV)-induced skin disorders. In UVB-induced skin damage, cell autophagy and apoptosis have been approved to prevent the damage and to contribute to the cytoprotective role of RSV; however, the detailed mechanism remains unknown. So, we conducted this study to investigate the cytoprotective effects of RSV on UVB-irradiated human epidermal keratinocytes (HEKs) and its undergoing mechanisms.Methods:Secretion of thirty-six inflammatory cytokines of HEKs induced by 50 mJ/cm2 UVB at 0, 12, 24, and 48 hours were detected by a human cytokine assay and the interleukin (IL)-8 protein level in the culture media were determined by ELISA. Next, HEKs were treated with or without 100 μmol/L RSV in the presence or absence of 50 mJ/cm2 UVB, and activator protein 1 and NF-κB-related proteins were measured by Western blot. Furthermore, cells exposed to UVB radiation were treated with apoptosis activators procaspase-activating compound 1 (PAC-1), apoptosis activator 2 (AA2) or RSV to investigate the effect of RSV on the percentage of apoptotic cells by flow cytometry. Then cells were treated with autophagy inhibitors LY294002, 3-methyladenine (3-MA) or RSV in the presence of UVB and chloroquine (CQ) to investigate the effect of RSV on autophagy through detecting microtubule-associated protein 1 light chain 3 (LC3) expression by western blot. Finally, the effect of LY294002, 3-MA, ATG5 siRNA, PAC-1, and AA2 on RSV-mediated reduction of IL-8 expression was determined by ELISA assay.Results:RSV treatment decreased the secretion of IL-8 (UVB vs. UVB+ RSV: [1454.05 pg/mL ± 52.95 pg/mL] vs. [553.68 pg/mL ± 206.03 pg/mL], P < 0.001), and downregulated the protein level of c-Fos in UVB-irradiated HEKs (UVB vs. UVB+ RSV: [0.103 ± 0.009] vs. [0.048 ± 0.015], P < 0.01). In UVB-irradiated HEKs, the result of western blot showed that LY294002 and 3-MA inhibited RSV-induced LC3 II accumulation (UVB + CQ + RSV vs. UVB + CQ + 3-MA+ RSV vs. UVB + CQ + LY294002+ RSV: [1.15 ± 0.03] vs. [0.77 ± 0.13] vs. [0.67 ± 0.13], P < 0.01), and the result of flow cytometry showed that PAC-1 and AA2 prevented RSV from reducing cell apoptosis (UVB+ RSV vs. UVB+ PAC-1 + RSV vs. UVB+ AA2+ RSV: [19.56% ± 0.62%] vs. [94.33% ± 0.15%] vs. [94.97% ± 1.91%], P < 0.001). The data of ELSA assay showed that LY294002, 3-MA, and ATG5 siRNA reversed the RSV-mediated inhibition of IL-8 protein secretion by UVB-irradiated HEKs (UVB + LY294002 vs. UVB + LY294002 + RSV: [3283.00 pg/mL ± 444.05 pg/mL] vs. [1608.58 pg/mL ± 128.42 pg/mL], P < 0.05; UVB + 3-MA vs. UVB+ 3-MA+ RSV: [2941.88 pg/mL ± 103.80 pg/mL] vs. [1867.51 pg/mL ± 153.84 pg/mL], P < 0.01; UVB+ siATG5 vs. UVB+ siATG5+ RSV: [2530.11 pg/mL ± 685.34 pg/mL] vs. [3011.42 pg/mL ± 435.69 pg/mL], P > 0.05), whereas neither PAC-1 nor AA2 exerted similar effects.Conclusion:RSV may regulate autophagic flux to inhibit IL-8 expression in UVB-challenged keratinocytes.
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简介:【摘要】目的:探析高频B超在乳腺疾病诊断中的临床病理研究。方法:选取2018年3月~2020年3月我院收治的100例乳腺疾病患者做为研究对象,按照抽签的方式将其分为常规组和实验组,每组50例,常规组患者采用常规超声检查,实验组患者采用高频B超检查。然后与最终病理做对比,比较两组患者乳腺疾病诊断准确率。 结果:实验组患者经高频B超检查后检出乳腺炎性病变25例,纤维腺良性肿瘤15例,乳腺恶性肿瘤8例,其中检出浸润性导管癌2例,导管内原位癌4例,小叶癌2例,检查准确率为96%,明显高于常规超声检查78%的准确率。(P<0.05),有统计学意义。结论:采用高频B超检查乳腺疾病准确率高,能够为后续治疗提高有效支持,值得临床广泛推广应用。
简介:摘要:目的对B超诊断在妇科子宫肌瘤疾病诊断中的临床应用效果进行研究。方法在本次研究中,随机选取我院在2018年1月到2019年12月期间收治的患者中的76例作为研究对象,对这些患者的临床疾病诊断,其全部采用的是超声B超方法进行诊断,然后通过对患者的病灶进行观察和临床分析,将患者的病理检测结果同其B超诊断结果进行对比。结果通过病理检查对患者的病情进行确认,然后以此作为标准,B超诊断的准确率为88.2%,腹部B超诊断的准确率为81.25%,而对于阴道B超诊断结果的准确率为90%。结论对于妇科子宫肌瘤疾病的临床诊断,其采用B超诊断的准确率较高,且这种诊断方法操作更加简单,能够大大提高该疾病的临床诊断效率。
简介:摘要: 本文从华北油田电网的现状出发,引进了SID-40B无扰动替续切换装置,介绍了其原理及与传统备自投相比较的优越性,指出了在使用中的注意事项,为同行业在快切装置的应用提供指导和借鉴。
简介:AbstractAlthough the first-line rituximab plus cyclophosphamide, doxorubicin, vincristine, and prednisone regimen (R-CHOP) substantially improved outcomes for patients with diffuse large B-cell lymphoma (DLBCL), 40% of the patients suffered from relapsed/refractory disease and had poor survival outcomes. The detailed mechanism underlying R-CHOP resistance has not been well defined. For this review, we conducted a thorough search for literature and clinical trials involving DLBCL resistance. We discussed DLBCL biology, epigenetics, and aberrant signaling of the B-cell receptor (BCR), phosphatidylinositol 3-kinase (PI3K)/Akt, nuclear factor kappa light chain enhancer of activated B-cells (NF-κB), and the Janus kinase (JAK)/signal transducer and activator of transcription 3 (STAT3) pathways as defining mechanisms of DLBCL heterogeneity and R-CHOP resistance. The cell of origin, double- or triple-hit lymphoma and double-protein-expression, clonal evolution, tumor microenvironment, and multi-drug resistance help to contextualize DLBCL resistance in an (epi)genetically and biologically comparative manner. With better understanding of the biological and molecular landscape of DLBCL, a more detailed classification system and tailored treatments will ideally become available to further improve the prognosis of DLBCL patients.
简介:摘要目的探讨综合放疗用于初诊ⅣB期胸段食管鳞癌患者的价值。方法选取2010—2016年间于河北医科大学第四医院初诊并经胃镜/食管镜或转移灶活检证实为ⅣB的原发胸段食管鳞癌患者199例。单纯远处淋巴结转移者130例(65.3%),单纯实质脏器转移51例(25.6%),实质脏器合并远处淋巴结转移者18例(9.0%)。单纯化疗16例(8.0%),单纯放疗50例(25.1%),放化疗133例(66.8%)(同期放化疗81例、序贯放化疗52例)。使用Kaplan-Meier法计算生存率并行log-rank检验差异,采用Cox模型行多因素预后分析。结果全组中位总生存期为12.3个月(95%CI为10.6~15.4个月),1、2、3、5年总生存率分别为52.1%、25.2%、19.1%、11.5%。多因素分析显示病变长度、转移器官数目、治疗模式是总生存的独立影响因素。同期放化疗对比序贯放化疗总生存相近(P=0.955)。放疗剂量≥6000 cGy组患者总生存明显高于4500~5039 cGy组和5040~6000 cGy组(均为P<0.001)。结论对于初诊ⅣB期胸段食管鳞癌患者,原发病变长度≤3cm、单器官转移、放化疗模式有相对更长的总生存。对于体质较好的患者可考虑在全身化疗基础上将放疗参与到Ⅳ期食管癌的综合治疗中,个体化选择序贯或同期放化疗模式。在患者能够耐受基础上,建议给予原发灶或非区域转移淋巴结等部位进行放化疗,以达到延长患者生存的目的。
简介:摘要: 随着我国航空公司飞机机型和数量的不断增加,近年来许多航空器都陆续选装了适合新航行系统的电子机载设备,具备了地空双向数据通信能力。同时空管自动化系统随着自身的不断升级也完全具备处理ADS航迹的能力,下面就具体阐述下ADS-B与雷达融合在太原的实际应用。关键词:
简介:摘 要:本文介绍了B296-X6井概况,钻井施工中的技术难点,施工中使用的优快钻井技术,克服了造斜点浅、井斜大、裸眼段长、位移大,轨迹难控制等困难,顺利完成施工任务。所使用的优快钻井技术,对其它大位移井施工亦有借鉴意义。
简介:摘 要:目的:探究产前进行B超检查对胎儿异常的诊断价值。方法:选取2020年5月到2021年4月之间,我院收治的60例孕产妇作为本次研究对象,将其按照住院号随机分成两组,分别为实验组和对照组,每组患者各30例,对照组患者在孕妇产后进行胎儿的B超检查,实验组患者在产前进行B超检查。对比两组生产的胎儿异常情况。结果:实验组生产的胎儿异常情况发生率为3.33%,对照组生产的胎儿异常情况发生率为20%,实验组明显低于对照组,P<0.05,具有统计学意义。结论:在孕妇产前进行相关B超检查,可以发现胎儿是否有异常,即使进行处理,可以有效减少新生胎儿的异常发生率,适合在临床上广泛应用。
简介:摘要: 目的:研究分析磁疗系统配合常规治疗对于矽肺患者的效果与作用。方法:选择从2019年1-12月来我院接受治疗的矽肺患者52名,将其随机分成治疗组和对照组,治疗组25名,对照组27名,治疗组增加磁疗系统治疗,每日一次,每次30min。比较治疗组和对照组的患者在治疗后的肺功能变化情况、基本病症的改善情况。结果:经过一段时间治疗后,治疗组有21例患者病情得到改善,总有效率达84.00%;对照组有19例患者病情得到改善,总有效率达70.37%,两组疗效差异有统计学意义(P<0.05)。结论:治疗组所提倡的磁疗系统与西医疗法相结合使用的方法对于治疗矽肺患者有明显的优势,值得在临床上推广使用。