具核梭杆菌诱导内质网应激相关蛋白GRP78及XBP1高表达在食管鳞癌中的临床意义

目的分析食管鳞癌（ESCC）中具核梭杆菌（Fn）对内质网应激相关蛋白葡萄糖调节蛋白78（GRP78）及X盒结合蛋白1（XBP1）的诱导效应，并探讨其潜在机制及临床意义。方法采用Fn感染ESCC细胞KYSE150及KYSE140不同时间（12 h、24 h及48 h），通过氧化应激指标试剂盒及Western blot检测各组细胞中氧化应激指标（ROS、MDA与SOD）及GRP78与XBP1的表达情况。实验分为Fn组，Fn+siNC1组，Fn+siGRP78组，Fn+siNC2组及Fn+siXBP1组，比较各组细胞中氧化应激指标、紫杉醇（PTX）应答效力、增殖、侵袭及转移能力差异。采用RNA scope及免疫组化法检测234例ESCC组织及癌旁组织中Fn感染及GRP78与XBP1的表达情况。利用卡方检验分析各因素与患者临床病理特征之间的相关性。采用Kaplan-Meier生存分析比较各因素对患者生存期的影响。结果与Fn未感染的KYSE150及KYSE140组细胞相比，Fn感染组（12 h、24 h及48 h）细胞中ROS与MDA含量逐渐增加，SOD活性逐渐降低，且GRP78及XBP1表达量逐渐增高（均P < 0.05）。与Fn组、Fn+siNC1组及Fn+siNC2组相比，Fn+siGRP78组及Fn+siXBP1组细胞中ROS与MDA含量减少，SOD活性增强，PTX应答效力增强，增殖、侵袭及转移能力减弱（均P < 0.05）。ESCC组织中Fn感染率、GRP78及XBP1阳性率分别为43.16%、69.66%及60.68%，三者具有显著一致性（P < 0.05）。Fn感染阳性、GRP78及XBP1高表达的患者多为有吸烟、饮酒史的男性患者，且肿瘤分化程度低、浸润程度深、淋巴结转移率高、临床分期多为Ⅲ/Ⅳ期。三者阳性组的患者5年生存期均缩短（P < 0.05）。结论Fn可通过诱导GRP78及XBP1高表达，引发内质网应激，促进ESCC恶性演进

Measurement of integrated luminosity of data collected at 3.773 GeV by BESIII from 2021 to 2024

We present a measurement of the integrated luminosity e+e- of collision data collected by the BESIII detector at the BEPCII collider at a center-of-mass energy of Ecm = 3.773 GeV. The integrated luminosities of the datasets taken from December 2021 to June 2022, from November 2022 to June 2023, and from October 2023 to February 2024 were determined to be 4.995±0.019 fb-1, 8.157±0.031 fb-1, and 4.191±0.016 fb-1, respectively, by analyzing large angle Bhabha scattering events. The uncertainties are dominated by systematic effects, and the statistical uncertainties are negligible. Our results provide essential input for future analyses and precision measurements

Determination of the number of ψ(3686) events taken at BESIII

The number of ψ(3686) events collected by the BESIII detector during the 2021 run period is determined to be (2259.3±11.1)×106 by counting inclusive ψ(3686) hadronic events. The uncertainty is systematic and the statistical uncertainty is negligible. Meanwhile, the numbers of ψ(3686) events collected during the 2009 and 2012 run periods are updated to be (107.7±0.6)×106 and (345.4±2.6)×106, respectively. Both numbers are consistent with the previous measurements within one standard deviation. The total number of ψ(3686) events in the three data samples is (2712.4±14.3)×10^