Unaltered repopulation properties of mouse hematopoietic stem cells transduced with lentiviral vectors

被引：18

作者：

Gonzalez-Murillo, Africa ^{[1
,2
]}

Lozano, M. Luz ^{[1
,2
]}

Montini, Eugenio ^{[3
]}

Bueren, Juan A. ^{[1
,2
]}

Guenechea, Guillermo ^{[1
,2
]}

机构：

[1] CIEMAT, Hematopoiesis & Gene Therapy Div, E-28040 Madrid, Spain

[2] CIBERER, Madrid, Spain

[3] Univ Milan, Osped San Raffaele, HSR TIGET, I-20127 Milan, Italy

来源：

BLOOD | 2008年 / 112卷 / 08期

关键词：

D O I：

10.1182/blood-2008-03-142661

中图分类号：

R5 [内科学];

学科分类号：

1002 ; 100201 ;

摘要：

Recent studies of retroviral-mediated gene transfer have shown that retroviral integrations themselves may trigger nonmalignant clonal expansion of hematopoietic stem cells (HSCs) in transplant recipients. These observations suggested that previous conclusions of HSC dynamics based on gamma-retroviral gene marking should be confirmed with improved vectors having a more limited capacity to transactivate endogenous genes. Because of the low trans-activation activity of self-inactivating lentiviral vectors (LVs), we have investigated whether the LV marking of mouse HSCs induces a competitive repopulation advantage in recipients of serially transplants. As deduced from analyses conducted in primary and secondary recipients, we concluded that lentivirally transduced HSCs have no competitive repopulation advantages over untransduced HSCs. By linear amplification-mediated polymerase chain reaction (LAM-PCR) analysis, we characterized LV-targeted genes in HSC clones that engrafted up to quaternary recipients. Although 9 clones harbored integrations close to defined retroviral insertion sites, none was characterized as a common integration site, and none was present in HSC clones repopulating quaternary recipients. Taken together, our results show unaltered repopulation properties of HSCs transduced with LVs, and confirm early studies suggesting the natural capacity of a few HSC clones to generate a monoclonal or oligoclonal hematopoiesis in transplant recipients.

引用

页码：3138 / 3147

页数：10

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