Ex Vivo Culture of Fancc-/- Stem/progenitor Cells Predisposes Cells to Undergo Apoptosis, and Surviving Stem/progenitor Cells Display Cytogenetic Abnormalities and an Increased Risk of Malignancy

Overview

Journal Blood

Publisher Elsevier

Specialty Hematology

Date 2005 Jan 13

PMID 15644418

Citations 32

Authors

Xiaxin Li

Michelle M Le Beau

Samantha Ciccone

Feng-Chun Yang

Brian Freie

Shi Chen

Jin Yuan

Ping Hong

Attilio Orazi

Laura S Haneline

D Wade Clapp

Affiliations

Soon will be listed here.

Abstract

Current strategies for genetic therapy using Moloney retroviruses require ex vivo manipulation of hematopoietic cells to facilitate stable integration of the transgene. While many studies have evaluated the impact of ex vivo culture on normal murine and human stem/progenitor cells, the cellular consequences of ex vivo manipulation of stem cells with intrinsic defects in genome stability are incompletely understood. Here we show that ex vivo culture of Fancc(-/-) bone marrow cells results in a time-dependent increase in apoptosis of primitive Fancc(-/-) progenitor cells in conditions that promote the proliferation of wild-type stem/progenitor cells. Further, recipients reconstituted with the surviving Fancc(-/-) cells have a high incidence of cytogenetic abnormalities and myeloid malignancies that are associated with an acquired resistance to tumor necrosis factor alpha (TNF-alpha). Collectively, these data indicate that the intrinsic defects in the genomic stability of Fancc(-/-) stem/progenitor cells provide a selective pressure for cells that are resistant to apoptosis and have a propensity for the evolution to clonal hematopoiesis and malignancy. These studies could have implications for the design of genetic therapies for treatment of Fanconi anemia and potentially other genetic diseases with intrinsic defects in genome stability.

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