The white adipose tissue used in lipotransfer procedures is a rich reservoir of CD34+ progenitors able to promote cancer progression.

Abstract:

:Previous studies have suggested a "catalytic role" in neoplastic angiogenesis and cancer progression for bone marrow-derived endothelial progenitor cells (EPC). However, preclinical and clinical studies have shown that the quantitative role of marrow-derived EPCs in cancer vascularization is extremely variable. We have found that human and murine white adipose tissue (WAT) is a very rich reservoir of CD45-CD34(+) EPCs with endothelial differentiation potential, containing a mean of 263 times more CD45-CD34(+) cells/mL than bone marrow. Compared with marrow-derived CD34(+) cells mobilized in blood by granulocyte colony-stimulating factor, purified WAT-CD34(+) cells expressed similar levels of stemness-related genes, significantly increased levels of angiogenesis-related genes, and increased levels of FAP-α, a crucial suppressor of antitumor immunity. In vitro, WAT-CD34(+) cells generated mature endothelial cells and capillary tubes as efficiently as mature mesenchymal cells. The coinjection of human WAT-CD34(+) cells from lipotransfer procedures contributed to tumor vascularization and significantly increased tumor growth and metastases in several orthotopic models of human breast cancer in immunodeficient mice. Endothelial cells derived from human WAT-CD34(+) cells lined the lumen of cancer vessels. These data indicate that CD34(+) WAT cells can promote cancer progression and metastases. Our results highlight the importance of gaining a better understanding of the role of different WAT-derived cells used in lipotransfer for breast reconstruction in patients with breast cancer.

journal_name

Cancer Res

journal_title

Cancer research

authors

Martin-Padura I,Gregato G,Marighetti P,Mancuso P,Calleri A,Corsini C,Pruneri G,Manzotti M,Lohsiriwat V,Rietjens M,Petit JY,Bertolini F

doi

10.1158/0008-5472.CAN-11-1739

subject

Has Abstract

pub_date

2012-01-01 00:00:00

pages

325-34

issue

1

eissn

0008-5472

issn

1538-7445

pii

0008-5472.CAN-11-1739

journal_volume

72

pub_type

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