Follicular lymphoma-like B cells in healthy individuals: a novel intermediate step in early lymphomagenesis.

Follicular lymphoma-like B cells in healthy individuals: a novel intermediate step in early lymphomagenesis.
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DOI:
10.1084/jem.20061292
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发表时间:
2006-10-30
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Nadel B
Nadel B
中科院分区:
其他
文献类型:
--
作者:
Roulland S;Navarro JM;Grenot P;Milili M;Agopian J;Montpellier B;Gauduchon P;Lebailly P;Schiff C;Nadel B

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滤泡性淋巴瘤是最常见的成人淋巴瘤之一,尽管其相对惰性,但几乎无法治愈。t(14; 18)(q32; q21)易位是滤泡性淋巴瘤(FL)发病机制的遗传标志和早期起始事件,也以低频率存在于健康个体的外周血中。长期以来,人们一直认为,在健康个体中,t(14;18)由循环中静止的幼稚B细胞携带,在那里其致癌潜力将受到抑制。在这里,我们对当前的观点提出质疑,并证明在健康个体中,t(14;18)实际上是由生发中心产生的不断扩大的非典型B细胞群体携带的,显示FL的基因型和表型特征,并且容易构成有效的癌前FL生态位。这些发现强烈地影响了目前对疾病进展的理解和对血液中t(14;18)频率作为淋巴瘤潜在早期生物标志物的正确处理。
Follicular lymphoma is one of the most common adult lymphoma, and remains virtually incurable despite its relatively indolent nature. t(14;18)(q32;q21) translocation, the genetic hallmark and early initiating event of follicular lymphoma (FL) pathogenesis, is also present at low frequency in the peripheral blood of healthy individuals. It has long been assumed that in healthy individuals t(14;18) is carried by circulating quiescent naive B cells, where its oncogenic potential would be restrained. Here, we question this current view and demonstrate that in healthy individuals, t(14;18) is actually carried by an expanding population of atypical B cells issued from germinal centers, displaying genotypic and phenotypic features of FL, and prone to constitute potent premalignant FL niches. These findings strongly impact both on the current understanding of disease progression and on the proper handling of t(14;18) frequency in blood as a potential early biomarker for lymphoma.
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