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Elevated vitamin B₁₂ levels in autoimmune lymphoproliferative syndrome attributable to elevated haptocorrin in lymphocytes.
Clinical biochemistry Pub Date : 2012-01-28 , DOI: 10.1016/j.clinbiochem.2012.01.016
Raffick A R Bowen 1 , Kennichi C Dowdell , Janet K Dale , Steven K Drake , Thomas A Fleisher , Glen L Hortin , Alan T Remaley , Ebba Nexo , V Koneti Rao
Affiliation  

OBJECTIVE Identify the etiology of elevated B(12) in autoimmune lymphoproliferative syndrome (ALPS). DESIGN Peripheral blood of ALPS patients with elevated B(12) and controls were evaluated. RESULTS Total and holo-haptocorrin (HC) levels were 26- and 23-fold higher in ALPS patients, respectively. No abnormal B(12)-binding proteins were found. Western blot revealed HC in lymphocyte lysates only from ALPS patients. CONCLUSION Elevated concentrations of B(12) found in ALPS patients were due to increased lymphocyte expression of HC.

中文翻译:


自身免疫性淋巴增殖综合征中维生素 B12 水平升高可归因于淋巴细胞中 haptocorrin 升高。



目的 确定自身免疫性淋巴增殖综合征 (ALPS) 中 B(12) 升高的病因。设计 对 B(12) 升高的 ALPS 患者和对照者的外周血进行了评估。结果 ALPS 患者的总和 Holo-haptocorrin (HC) 水平分别高出 26 倍和 23 倍。未发现异常 B(12) 结合蛋白。蛋白质印迹显示仅 ALPS 患者的淋巴细胞裂解物中存在 HC。结论 ALPS 患者中 B(12) 浓度升高是由于 HC 淋巴细胞表达增加所致。
更新日期:2012-01-28
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