Blood:羟基脲可减轻镰状细胞性贫血患者的脑代谢压力

2019-03-20 不详 MedSci原创

中心点:与未治疗的患者相比,采用HU治疗的SCA患者的脑代谢压力有所降低,但仍高于采用CTT治疗的患者的。HU可减少中风风险最高区域代谢压力最大的脑组织体积。摘要:长期输血疗法(CTT)可预防部分镰状细胞性贫血患者(SCA)中风。Melanie E. Fields等人发现,CTT减轻了脑代谢压力的特征,可由增高的氧萃取分数(OEF)来指示,OEF可能与中风风险相关。OEF最高的区域位于脑边界区,这

中心点:

与未治疗的患者相比,采用HU治疗的SCA患者的脑代谢压力有所降低,但仍高于采用CTT治疗的患者的。

HU可减少中风风险最高区域代谢压力最大的脑组织体积。

摘要:

长期输血疗法(CTT)可预防部分镰状细胞性贫血患者(SCA)中风。Melanie E. Fields等人发现,CTT减轻了脑代谢压力的特征,可由增高的氧萃取分数(OEF)来指示,OEF可能与中风风险相关。OEF最高的区域位于脑边界区,这里脑血流(CBF)最低;在CTT治疗后,该区域的OEF会降低。但羟基脲(HU)的神经保护作用尚不明确。

研究人员推测采用HU治疗可降低患者的脑代谢压力,为了验证该推测,研究人员招募了84位SCA患者,分至对照组(无疾病适应性治疗)、HU组以及CTT组,在治疗前,对所有患者进行脑MRIs扫描,评估患者的CBF和OEF。

治疗后,3组之间的脑CBF无明显差异(p=0.148)。但是,全脑OEF出现显著差异(p<0.001):对照组的OEF最高(42.9[39.1-49.1]%)、HU组次之(40.7[34.9-43.6]%),CTT组最低(35.3[32.2-38.9]%)。此外,HU组缺血风险最高的脑白质比例(根据OEF高于40和42.5%定义)低于对照组(p=0.025和p=0.034),但高于CTT组(p=0.018和0.029)。

综上所述,HU可能通过减轻SCA患者的脑代谢压力发挥神经保护性作用,但保护效果不如CTT。

原始出处:

Melanie E. Fields, et al.Hydroxyurea reduces cerebral metabolic stress in patients with sickle cell anemia.Blood 2019 :blood-2018-09-876318; doi: https://doi.org/10.1182/blood-2018-09-876318 

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    2019-03-21 深海的鱼

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