简介:摘要:鄂尔多斯盆地西南缘延长组长8储层主要为长石岩屑砂岩,孔隙度平均值为11.7%,渗透率为0.56mD,属于典型的低孔低渗储层。通过对长8油层组储层铸体薄片的观察,明确了该区储层主要经历了压实、压溶、胶结、交代等破坏性成岩作用,同时溶蚀作用的发生改善了储层物性。
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.
简介:摘要目的筛选在肺腺癌(LUAD)中起关键作用的肿瘤干细胞相关基因(SRGs),并研究作用机制,和对患者预后的影响。方法从GEO数据库和TCGA数据库下载肺腺癌数据集的基因表达谱。使用R软件分析差异表达基因(DGEs),并和SRGs交叉分析,确定影响肺腺癌发生和预后的关键SRGs。采用蛋白质-蛋白质相互作用(PPI)网络构建方法对关键SRGs分析,利用GO和GSEA进行富集分析。使用TIMER数据库分析SRGs对肿瘤免疫浸润的影响。此外,分析SRGs与生存预后的关系。结果在数据集GSE68465中得到740个差异基因,在数据集GSE31210中得到364个差异基因,在数据集GSE115002中得到859个差异基因,在TCGA数据集中得到4 464个差异基因,4个数据集与肿瘤干性基因集取交集得到干性基因CDCA8。采用GO和GSEA分析CDCA8主要参与有丝分裂过程,PPI分析得到核心基因,TIMER分析CDCA8与多种免疫细胞表达水平相关,高表达CDCA8肺腺癌患者预后较差。结论CDCA8作为SRGs参与肺腺癌发生发展过程,与肺腺癌免疫浸润相关,是肺腺癌患者生存与预后评价指标之一,并可为免疫治疗发展提供新的思路。
简介:摘要为探讨SCN8A基因突变相关婴儿痉挛症的临床特点与诊治,选择四川大学华西第二医院2019年9月收治的1例1岁9个月的SCN8A基因突变相关婴儿痉挛症患儿,采用回顾性分析方法对其临床表现和诊治过程进行分析。同时复习相关文献,总结SCN8A基因突变相关婴儿痉挛症的临床特点与诊治要点。本研究系国内首次关于SCN8A基因突变相关婴儿痉挛症的报道,且该患儿合并食管裂孔疝,目前在SCN8A基因突变患儿中尚未报道过。该例患儿在8月龄抽搐发作后出现了明显的发育倒退,联合应用多种抗癫痫药物效果欠佳,此次发作类型转变为婴儿痉挛症,入院后减停左乙拉西坦,应用促皮质素(ACTH)治疗,痉挛发作逐渐缓解。食管裂孔疝可能是SCN8A基因突变的一个表型,该例患儿扩展了SCN8A基因表型谱。SCN8A基因突变相关癫痫的抗癫痫药物选用钠离子通道阻滞剂治疗有效。SCN8A基因突变相关婴儿痉挛症应用ACTH治疗有一定效果。
简介:摘 要:本文结合孤东区块孤东8-16-斜121井的施工情况,从基层角度就口井的作业环节进行总结,针对该井三开油气显示较差,技术套管内开窗侧钻的问题,从不同的层面就该井施工中遇到的实际问题进行分析,研究开窗的作业流程,总结施工经验,学习开窗的广泛应用,为以后同类型井的施工积累经验。
简介:摘要目的了解不同甲状腺容积校正方法对武汉市学龄儿童的适用性,探索适宜武汉市学龄儿童的甲状腺容积的校正方法。方法2019年5 - 8月,在武汉市洪山、汉阳、汉南、江夏、东西湖区,按东、西、南、北、中5个方位划分5个抽样片区,每个片区抽取1所小学,每所小学抽取8 ~ 10岁非寄宿学生40人(性别均衡)作为调查对象,采集随机1次尿样、家庭食用盐盐样检测尿碘、盐碘含量,测量儿童身高、体重、甲状腺容积。同时,采用身高容积指数1(HVI1)、体重身高容积指数(WHVI)、体质容积指数(BMIV)、体表面积容积指数(BSAV)和身高容积指数2(HVI2)对甲状腺容积进行校正。结果共调查8 ~ 10岁儿童1 000人,其中男生499人、女生501人;8、9、10岁儿童各269、321、410人。尿碘中位数为247.50 μg/L;盐碘中位数为23.20 mg/kg;身高、体重、甲状腺容积分别为140.00(133.00,146.00)cm、31.00(27.00,37.00)kg、2.56(2.13,3.21)ml。共检出甲状腺肿大儿童30人,甲状腺肿大率为3%(30/1 000)。男、女生甲状腺容积分别为2.57(2.16,3.28)、2.56(2.10,3.16)ml,不同性别间比较差异无统计学意义(U = - 0.981,P > 0.05)。8、9、10岁儿童甲状腺容积分别为2.31(1.98,2.81)、2.68(2.13,3.30)、2.74(2.28,3.35)ml,不同年龄间比较差异有统计学意义(H = 47.585,P < 0.01)。经Spearman相关分析,8、9、10岁儿童原始甲状腺容积与身高、体重均呈正相关(P均< 0.01)。经HVI1校正后,8岁儿童甲状腺容积与身高未见相关性(P > 0.05),与体重呈正相关(P < 0.01);9、10岁儿童甲状腺容积与身高、体重均呈正相关(P均< 0.01)。经WHVI校正后,8、9、10岁儿童甲状腺容积与身高、体重均呈负相关(P均< 0.01)。经BMIV校正后,8、9、10岁儿童甲状腺容积与身高均呈正相关(P均< 0.01);10岁儿童甲状腺容积与体重呈负相关(P < 0.05)。经BSAV校正后,9岁儿童甲状腺容积与体重呈正相关(P < 0.05)。经HVI2校正后,9岁儿童甲状腺容积与体重呈正相关(P < 0.01)。5种校正方法得出的甲状腺容积均小于原始甲状腺容积,其中BSAV校正后的甲状腺容积最接近原始甲状腺容积,差异在0.87% ~ 13.87%。结论武汉市学龄儿童甲状腺容积受年龄、身高、体重因素影响,甲状腺肿大的判定应对这些因素加以校正。BSAV校正方法相对独立,较为稳定,可消除身高、体重对甲状腺容积的影响,初步认为其适用于武汉市学龄儿童甲状腺容积的校正。