重组人促红细胞生成素联合铁剂治疗围手术期贫血

重组人促红细胞生成素（促红素）与铁剂联合治疗方案的长期应用已被证实对肾性或肿瘤相关性贫血具有良好疗效。然而,对于围手术期贫血的短期治疗,联合应用的证据尚不充分。相比于促红素单药治疗,联合治疗从不同角度升高血红蛋白,从而叠加贫血治疗效果,缩短疗程,提高治疗效率。我们开展了一项回顾性病例对照研究,纳入95例骨科围手术期轻度贫血(血红蛋白≥90 g/L)患者,结果发现联用组术后血红蛋白水平显著高于促红素组,而术后输血风险约为促红素组的25%,提示对于围手术期轻度贫血患者,联合治疗可能优于促红素单药治疗。     

Erythropoietin enhances immune responses in mice

Erythropoietin (Epo) is the main erythropoietic hormone. Recombinant human Epo (rHuEpo) is thus used in clinical practice for the treatment of anemia. Accumulating data reveals that Epo exerts pleiotropic activities. We have previously shown an anti-neoplastic activity of Epo in murine multiple myeloma (MM) models, and in MM patients. Our findings that this anti-neoplastic effect operates via CD8+ T lymphocytes led us to hypothesize that Epo possesses a wider range of immunomodulatory functions. Here we demonstrate the effect of Epo on B lymphocyte responses, focusing on three experimental models: (i) tumor-bearing mice, (5T2 MM mouse); (ii) antigen-injected healthy mice; and (iii) antigen-injected transgenic mice (tg6), overexpressing human Epo. In the MM model, despite bone marrow dysfunction, Epo-treated mice retained higher levels of endogenous polyclonal immunoglobulins, compared to their untreated controls. In both Epo-treated wild type and tg6 mice, Epo effect was manifested in the higher levels of splenocyte proliferative response induced in vitro by lipopolysaccharide. Furthermore, these mice had increased in vivo production of anti-dinitrophenyl (DNP) antibodies following immunization with DNP-keyhole limpet hemocyanin. Epo-treated mice showed an enhanced immune response also to the clinically relevant hepatitis B surface antigen. These findings suggest a potential novel use of rHuEpo as an immunomodulator.     

Activities of erythropoietin on tumors: an immunological perspective

There is a growing interest in the non-erythropoietic, tissue-protective and restorative actions of erythropoietin (EPO). While studies in this field have indicated that EPO can ameliorate chemotherapy-induced peripheral neuropathy and cardiotoxicity, the issue whether EPO can positively or negatively affect cancer patients is a hot one. In this debate, many activities of EPO are being considered, including tissue/neuroprotection, angiogenesis, anti-inflammatory activity, growth promotion, and inhibition of apoptosis. However, few studies have explored the interactions of EPO with the immune system. A study in this issue of the European Journal of Immunology by Katz et al. adds one new piece to the puzzle by showing that EPO can stimulate B cell-mediated immunity.     

促红细胞生成素心肌保护作用的研究进展

促红细胞生成素(EPO)是一种造血细胞生长因子,以往主要用于治疗多种原因所致的贫血。研究发现EPO受体广泛分布于各种非造血组织,其中包括心脏组织。最近的研究提示,EPO对心肌梗死、缺血再灌注损伤及阿霉素心肌损害等具有保护作用。     

荧光蛋白标记的促红细胞生长素融合蛋白的设计和预测

目的：探讨pTRE顺式作用元件调控，EGFP标记hEPO(hEPO-EGFP)融合蛋白设计的合理性。方法：应用Gene Construction Kit2．5、www．expasy．com网站提供的分析方案，分析重组体的开放读框以及融合蛋白的柔性．并作蛋白质二级结构模拟。结果：重组体的转录受pTRE顺式作用元件调控，Linker所在部位柔性高，融合蛋白表达后，二级结构预测Linker不改变蛋白结构，完全符合作者设计EGFP标记hEPO融合蛋白的初衷。结论：重组蛋白设计合理，融合蛋白有很大可能保留了hEPO和EGFP的理化特性，为进一步的实践操作提供了可靠的理论基础。     

自体骨髓基质干细胞移植联合EPO治疗脊髓损伤的研究

目的：探讨自体骨髓基质干细胞（MSCs）移植联合促红细胞生成素（EPO）对大鼠脊髓损伤（SCI）治疗的效果。方法：培养与纯化骨髓基质干细胞。80只SD大鼠制备脊髓损伤模型,随机分为4组：干细胞移植组、EPO组、联合组和对照组。采用BBB法进行运动能力评分和组织切片观察来评定修复情况。结果：三个实验组与对照组相比,差异具有统计学意义（P〈0.05）,三个实验组均可明显促进大鼠运动功能和损伤后组织结构的恢复,其中联合组效果更显著。结论：骨髓基质干细胞移植联合EPO具有促进大鼠脊髓损伤后神经功能的修复。     

重组人红细胞生成素治疗恶性肿瘤贫血的争论

近年来,在重组人红细胞生成素（rhEPO）治疗恶性肿瘤贫血的应用中,有较多的人主张rhEPO低剂量应用,其固定剂量的用法和每周一次的用法逐渐被医生和患者所接受。一些血液学指标,特别是治疗前血清红细胞生成素的水平,可预测其疗效。目前rhEPO不仅用于治疗重度贫血,也被用于治疗轻至中度贫血。     

蔗糖铁联合重组人促红细胞生成素治疗老年股骨粗隆间骨折围术期贫血患者的作用

目的 探讨应用蔗糖铁联合重组人促红细胞生成素(EPO)对老年股骨粗隆间骨折围术期贫血恢复及术后功能恢复的影响.方法 回顾性对比分析2016年7月至2018年12月于我院行防旋股骨近端髓内钉(PFNA)治疗老年股骨粗隆间骨折治疗患者78例,观察组围术期使用蔗糖铁联合EPO,共40例;对照组围术期未采取其他干预措施.比较两...     

低氧诱导因子-1α、促红细胞生成素在血管性痴呆大鼠海马的表达

目的 观察低氧诱导因子-1α（HIF-1α）和促红细胞生成素（EPO）在大鼠血管性痴呆（VD）形成过程中的动态表达规律,探讨VD发生的可能机制。方法 采用大鼠双侧颈总动脉永久性阻断法（2-VO）建立VD动物模型,应用Y型水迷宫实验测定动物的学习记忆能力,采用免疫组化法检测大鼠海马CA1区HIF-1α和EPO蛋白的表达．结果 ①随缺血时间的延长,痴呆组大鼠学习记忆能力进行性下降（P〈0．05）;②痴呆组大鼠海马CA1区HIF-1α、EPO的表达于缺血1周时最明显,此后缓慢下降,但与假手术组比较仍处于较高水平（P〈0．01）;③痴呆组大鼠两蛋白表达与学习记忆能力呈高度正相关（P〈0．01）。结论 HIF-1α和EPO参与了VD的发生发展过程,并可能在此过程中通过HIF—UEPO缺氧信号转导途径发挥了保护作用。