各位老师们好,最近参加一次会议,听了大牛老师们的讲课,觉得自己十分落后。有几个问题想请教大家:
一、关于MM,上周六听到会上一位教授讲到MM免疫分型中,CD81在正常PC中强表达,在MM细胞中一般呈阴性和弱阳性,因此有研究建议CD19-CD81-/dim+可用来鉴定MM细胞。但是我做的结果并非如此。不知各位老师们做的结果是怎样?另外我看了文献,
1. Leukemia. 2012 Aug;26(8):1862-9. doi: 10.1038/leu.2012.42. Epub 2012 Feb 15.
Clinical significance of CD81 expression by clonal plasma cells in high-risk smoldering and symptomatic multiple myeloma patients.研究显示: CD81 expression was detected in 45% (103/230) MM patients, and the detection of CD81(+) MM-PC was an independent prognostic factor for progression-free (hazard ratio=1.9; P=0.003) and overall survival (hazard ratio=2.0; P=0.02),与不良预后及疾病进展相关。2. Leuk Res. 2014 Mar;38(3):371-6. doi: 10.1016/j.leukres.2013.12.007. Epub 2013 Dec 11.
Flow cytometric differentiation of abnormal and normal plasma cells in the bone marrow in patients with multiple myeloma and its precursor diseases.研究结果显示:abnormal CD81 was only observed in APCs (APC detection sensitivity 95%; specificity 100%).
二、关于白血病免疫分型
想问下老师们,对于细胞表明抗原表达的阳性阈值是20%,那对于胞浆抗原表达的阳性阈值也一样吗?比如cMPO,cTDT,cCD79a?如果有表达,但是略小于20%,老师们怎么报的结果呢?是报部分表达吗?之前也有老师说部分表达这个说法不准确。好纠结。。。
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