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MORF’ing of cGAS-STING to precisely tune radiosensitization and immune activation in hepatocellular carcinoma
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作者 Tamalika Paul Manali Powar Irving Coy Allen 《Cellular & Molecular Immunology》 2026年第1期117-119,共3页
Radiotherapy is an effective local tumor ablation modality that can be used for the treatment of hepatocellular carcinoma(HCC)in specific clinical situations.Tumor cell ablation is facilitated through targeted ionizin... Radiotherapy is an effective local tumor ablation modality that can be used for the treatment of hepatocellular carcinoma(HCC)in specific clinical situations.Tumor cell ablation is facilitated through targeted ionizing radiation to directly induce DNA damage in cancer cells,which typically have dysfunctional DNA repair systems.In addition to direct tumor ablation,radiotherapy can also induce immunogenic cell death,release tumor-associated neoantigens,and promote dendritic cell activation.This type of immunogenic cell death can also significantly alter the tumor microenvironment,enhancing T-cell infiltration and reducing tumor-associated immune suppression. 展开更多
关键词 hepatocellular carcinoma hcc induce dna damage tumor ablationradiotherapy induce immunogenic cell deathrelease tumor ablation targeted ionizing radiation promote dendritic cell activationthis morfing
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弓形虫感染引起小胶质细胞与神经元的接触以及细胞体周边抑制性突触丧失 被引量:2
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作者 Carrillo GL Ballard VA +7 位作者 Glausen T Boone Z Teamer J Hinkson CL Wohlfert EA Blader IJ Fox MA 杜一星(编译) 《神经损伤与功能重建》 2020年第3期F0004-F0004,共1页
大脑内的感染和炎症会引起神经元连通性和功能的改变。细胞内的原生动物寄生虫,弓形虫,是一种感染脑部的病原体,可引起脑炎和癫痫发作。这种寄生虫的持续感染还与行为改变和发生精神疾病(包括精神分裂症)的风险增加有关。目前来自人类... 大脑内的感染和炎症会引起神经元连通性和功能的改变。细胞内的原生动物寄生虫,弓形虫,是一种感染脑部的病原体,可引起脑炎和癫痫发作。这种寄生虫的持续感染还与行为改变和发生精神疾病(包括精神分裂症)的风险增加有关。目前来自人类和小鼠模型的研究证据表明,癫痫发作和精神分裂症均由抑制性突触的丧失或功能障碍引起。与此相符,我们最近报道了持续性弓形虫感染改变谷氨酸脱羧酶67(GAD67)的分布,该酶在抑制性突触中催化GABA的合成。这些变化可能反映突触前装置在抑制性神经元中的重新分布或抑制性神经末梢的丧失。为了直接评估后者的可能性,我们采用序列块面扫描电子显微镜(SBFSEM)并量化寄生虫感染后新皮质和海马中的细胞体周边抑制性突触。持续感染不仅导致明显的细胞体周边突触丧失,而且还诱导髓样来源的细胞对神经元细胞体的包封。免疫组织化学、遗传和超微结构分析显示,这些髓样来源的细胞包括活化的小胶质细胞。最后,超微结构分析确定了包膜于细胞体周围神经末梢的髓样来源的细胞,提示它们可能会主动置换或吞噬突触元件。因此,这些结果表明,活化的小胶质细胞有助于寄生虫感染后细胞体周围抑制突触损失,并对于弓形虫的持续感染可能如何导致癫痫发作和精神疾病提供了一种新的机制。 展开更多
关键词 弓形虫 海马 抑制性突触 小胶质细胞 新皮质 细胞体周边突触
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星形胶质细胞对维持成年小鼠脑血脑屏障是必需的 被引量:1
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作者 Benjamin P Heithoff Kijana K George +4 位作者 Aubrey N Phares Ivan A Zuidhoek Carmen Munoz-Ballester Stefanie Robel 杜一星(编译) 《神经损伤与功能重建》 2021年第11期F0003-F0003,共1页
已知在成年大脑中多种细胞类型会产生调节血脑屏障(BBB)特性的因子,包括星形胶质细胞。然而,最近的几项研究对成熟星形胶质细胞在BBB中的作用提出了质疑。我们使用他莫昔芬诱导的星形胶质细胞消融小鼠模型,以确定星形胶质细胞在维持成年... 已知在成年大脑中多种细胞类型会产生调节血脑屏障(BBB)特性的因子,包括星形胶质细胞。然而,最近的几项研究对成熟星形胶质细胞在BBB中的作用提出了质疑。我们使用他莫昔芬诱导的星形胶质细胞消融小鼠模型,以确定星形胶质细胞在维持成年BBB中是否有有着非冗余和必要功能。在成年小鼠中,他莫昔芬诱导在2 h内导致星形胶质细胞稀疏的凋亡性死亡。早在星形胶质细胞消融出现时即可检测到小分子尸胺的渗漏和进入脑实质的大血浆蛋白纤维蛋白原等表明BBB损伤的迹象。在星形胶质细胞丢失区域内和邻近的血管,紧密连接蛋白zonula occludens-1的表达降低,而内皮葡萄糖转运蛋白1的表达不受干扰。尸胺渗漏持续数周,表明缺乏BBB的修复。这与消融的星形胶质细胞未被替换的发现一致。相邻的星形胶质细胞出现部分非增殖性胶质细胞增生,其特征是形态变化和STAT3的延迟磷酸化。这使泄漏入脑内的染料在消融1月后仍局限于缺乏星形胶质细胞覆盖的血管表面区域。总之,星形胶质细胞是维持成年大脑BBB完整性所必需的。其他细胞类型(如周细胞)分泌的BBB调节因子不足以补偿星形胶质细胞的缺失的影响。 展开更多
关键词 星形胶质细胞增生 接触抑制 胶质疤痕 胶质血管单位 紧密连接
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Patients’experiences with‘sludge’(administrative burden)in the cancer screening process and its relationship with screening completion,experience and health system distrust
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作者 Michelle S Rockwell Brianna Chang +8 位作者 Vivian Zagarese Jamie K Turner Ally Southworth YingXing Wu Paul Yeaton Li Li Jeffrey S Stein Sarah H Parker John W Epling 《Family Medicine and Community Health》 2024年第S02期8-17,共10页
Objective‘Sludge’refers to administrative burdens or frictions that preclude people from getting what they want or need(eg,duplicative forms,complicated instructions,long waiting times).This mixed methods study eval... Objective‘Sludge’refers to administrative burdens or frictions that preclude people from getting what they want or need(eg,duplicative forms,complicated instructions,long waiting times).This mixed methods study evaluated patients’perceptions of sludge in the colorectal cancer(CRC)screening process and some impacts of this sludge.Design We employed an exploratory sequential mixed methods study design that comprised patient interviews and a patient survey.The interviews informed final survey revisions and captured contextual data about patients’experiences with sludge.Interview transcripts were inductively and deductively analysed to identify overarching themes.The survey quantified sludge,delayed or forgone screenings,screening experience(Net Promoter Score)and health system distrust(Health System Distrust Scale).We usedχ2 or t-tests for univariable comparisons and logistic or linear regressions to evaluate the association between cumulative sludge score and delayed or forgone screenings,screening experience and health system distrust.Results were integrated for interpretation.Setting Southeastern United States.Participants Patients who were 45–75 years of age,at average risk for CRC and had either completed or been referred for CRC screening(colonoscopy or stool-based test)within the previous 12 months.Results 22 interview participants and 255 survey participants completed the study.38(15%)survey participants rated their screening experience as poor(Net Promoter Score=0–7 out of 10).The mean(SD)Health System Distrust Scale score was 22.4(6.3)out of 45 possible points(higher score=greater distrust).Perceptions of sludge in the CRC screening process varied,with long waiting times and burdensome communication being the most common sources(58%and 35%of participants,respectively).Sludge was positively associated with delayed or forgone screenings(OR=1.42,95%CI 1.28,1.57,p<0.001),poor screening experience(OR=1.15,95%CI 1.04,1.28,p=0.009)and health system distrust(β=0.47,p<0.001).Qualitative findings add descriptive detail about sludge encountered,context to impacts experienced,and illustrate the heavy emotional impact of sludge:‘it just isn’t worth it’.Conclusion Efforts to reduce sludge in the CRC screening process may improve timely completion of CRC screening,enhance patient experience and restore trust in the health system. 展开更多
关键词 SLUDGE SCREENING BURDEN
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