Acute wounds accelerate tumorigenesis by a T cell-dependent mechanism.
We investigated the influence of acute wounding on tumor growth in a syngeneic mouse breast cancer model. Metastatic mouse breast cancer cells (4T1) were orthotopically injected into the mammary fat pads of BALB/c mice, and animals were wounded locally by full thickness dermal incisions above the mammary fat pads or remotely above the scapula 9 days later. Local, but not remote, wounding increased tumor size when compared with sham treatment. Injection of wound fluid close to the tumor site increased tumor growth, whereas in vitro wound fluid compared with serum increased the proliferation rate of 4T1 cells. Our results show that wound stroma can unfavorably influence growth of nearby tumors. This effect is T cell-dependent, as local wounding had no effect on tumor growth in nu/nu mice. The effect of wounding on tumor growth can be mimicked by acellular wound fluid, suggesting that T cells secrete or mediate secretion of cytokines or growth factors that then accelerate tumor growth. Here, we define an experimental model of wound-promoted tumor growth that will enable us to identify mechanisms and therapeutic targets to reduce the negative effect of tissue repair on residual tumors.
Stuelten
Christina H
CH
Cell and Cancer Biology Branch, National Cancer Institute, Bethesda, Maryland 20892, USA. chrisstu@mail.nih.gov
Barbul
Adrian
A
Busch
Johanna I
JI
Sutton
Emily
E
Katz
Ryan
R
Sato
Misako
M
Wakefield
Lalage M
LM
Roberts
Anita B
AB
Niederhuber
John E
JE
D000818:Animals; D048708:Cell Growth Processes / Q000502:physiology; D002471:Cell Transformation, Neoplastic / Q000473:pathology*; D004195:Disease Models, Animal; D005260:Female; D008321:Mammary Glands, Animal / Q000293:injuries* / Q000473:pathology; D008325:Mammary Neoplasms, Experimental / Q000276:immunology / Q000473:pathology*; D051379:Mice; D008807:Mice, Inbred BALB C; D013601:T-Lymphocytes / Q000276:immunology / Q000473:pathology*; D014947:Wounds and Injuries / Q000276:immunology / Q000473:pathology*
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