Tridimas Andreas, Gillett Godfrey T, Pollard Sally, Sadasivam Nandini, Williams Adrian, Mellor Kirsty, Catchpole Anthony, Stepien Karolina M
Department of Clinical Biochemistry and Metabolic Medicine Royal Liverpool Hospital Liverpool UK.
Laboratory Medicine, Northern General Hospital Sheffield Teaching Hospitals NHS Foundation Trust Sheffield UK.
JIMD Rep. 2020 Oct 26;57(1):23-28. doi: 10.1002/jmd2.12176. eCollection 2021 Jan.
Acaeruloplasminemia is a rare autosomal recessive condition caused by inactivating mutations of the gene encoding caeruloplasmin (ferroxidase). Caeruloplasmin is a copper-containing plasma ferroxidase enzyme with a key role in facilitating cellular iron efflux. We describe a case of a patient with acaeruloplasminemia, confirmed by genetic analysis, treated with combination therapy of monthly fresh-frozen plasma (FFP) or Octaplas and iron chelation over a 3-year period. This 19-year-old male was diagnosed at the age of 14 after developing issues with social interaction at school prompting investigation. Prior to this, he had been well with a normal childhood. He was found to have an iron deficient picture with a paradoxically high ferritin, with low serum copper and undetectable caeruloplasmin. Genetic testing identified a homozygous splicing mutation, c.(1713 + delG);(c.1713 + delG), in intron 9 of the caeruloplasmin gene. Ferriscan showed a high liver iron concentration of 5.3 mg/g dry tissue (0.17-1.8). Brain and cardiac T2-weighted magnetic resonance (MR) imaging did not detect iron deposition of the brain or heart respectively. Treatment with monthly Octaplas infusion was commenced alongside deferasirox (540 mg o.d.) in an attempt to increase caeruloplasmin levels and reduce iron overload, respectively. After 3 years of treatment, there was biochemical improvement with a reduction in ferritin from 1084 (12-250) to 457 μg/L, ALT from 87 (<50) to 34 U/L together with improvement in his microcytic anaemia. No significant adverse events occurred. This case report adds further evidence of treatment efficacy and safety of combined FFP and iron chelation therapy in acaeruloplasminemia.
无铜蓝蛋白血症是一种罕见的常染色体隐性疾病,由编码铜蓝蛋白(铁氧化酶)的基因发生失活突变引起。铜蓝蛋白是一种含铜的血浆铁氧化酶,在促进细胞铁外流中起关键作用。我们描述了一例经基因分析确诊的无铜蓝蛋白血症患者,在3年期间接受了每月新鲜冷冻血浆(FFP)或Octaplas联合铁螯合治疗。这名19岁男性在14岁时因在学校出现社交互动问题而接受调查后被诊断出该病。在此之前,他童年正常,身体状况良好。他被发现有缺铁表现,同时铁蛋白异常升高,血清铜降低,铜蓝蛋白检测不到。基因检测在铜蓝蛋白基因第9内含子中发现了纯合剪接突变c.(1713 + delG);(c.1713 + delG)。Ferriscan检测显示肝脏铁浓度较高,为5.3 mg/g干组织(0.17 - 1.8)。脑部和心脏的T2加权磁共振成像(MR)分别未检测到脑部或心脏的铁沉积。开始每月输注Octaplas并同时服用地拉罗司(每日540 mg),分别试图提高铜蓝蛋白水平和减少铁过载。经过3年治疗,生化指标有所改善,铁蛋白从1084(12 - 250)降至457 μg/L,谷丙转氨酶从87(<50)降至34 U/L,小细胞贫血也有所改善。未发生重大不良事件。本病例报告进一步证明了FFP和铁螯合联合治疗无铜蓝蛋白血症的疗效和安全性。