Department of Pathology, Stanford University School of Medicine, Stanford, CA 94305, USA.
Clin Biochem. 2012 Apr;45(6):490-2. doi: 10.1016/j.clinbiochem.2012.01.016. Epub 2012 Jan 28.
Identify the etiology of elevated B(12) in autoimmune lymphoproliferative syndrome (ALPS).
Peripheral blood of ALPS patients with elevated B(12) and controls were evaluated.
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.
Elevated concentrations of B(12) found in ALPS patients were due to increased lymphocyte expression of HC.
确定自身免疫性淋巴组织增生综合征(ALPS)中 B(12)升高的病因。
评估 ALPS 患者和对照者的外周血。
ALPS 患者的总结合钴胺素和全钴胺素(HC)水平分别升高了 26 倍和 23 倍。未发现异常的 B(12)结合蛋白。Western blot 仅显示来自 ALPS 患者的淋巴细胞裂解物中存在 HC。
在 ALPS 患者中发现的 B(12)浓度升高是由于淋巴细胞 HC 表达增加所致。