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Xenotransplantation. 2009 Mar-Apr;16(2):74-82. doi: 10.1111/j.1399-3089.2009.00514.x.

Acute cell-mediated rejection in orthotopic pig-to-mouse corneal xenotransplantation.

Author information

1
Seoul Artificial Eye Center, Seoul National University Hospital Clinical Research Institute, 28 Yeongeon-dong, Chongno-gu, Seoul, Korea.

Abstract

BACKGROUND:

To investigate the role of T cells and natural killer (NK) cells in mediating corneal xenograft rejection in a pig-to-mouse model.

METHODS:

Pig corneas were orthotopically transplanted into BALB/c, C57BL/6, nude, severe combined immunodeficiency (SCID), and NOD/SCID/gammac(null) (NOG) mice. Graft survival was clinically assessed by slit-lamp biomicroscopy and median survival times (MST) were calculated. The rejected grafts were histologically evaluated using antibodies against CD4, CD8, NK1.1, and F4/80.

RESULTS:

The pig corneal xenografts were acutely rejected by BALB/c and C57BL/6 mice (MST 9.0 days), while nude, SCID and NOG mice rejected pig corneas in a more delayed fashion (MST 16.0, 16.4, and 16.9 days, respectively). The majority of infiltrating cells found in rejected grafts in C57BL/6 mice were macrophages and CD4(+) T cells, while CD8(+) T cells and NK cells were rarely found. The grafts in nude mice had markedly decreased inflammatory infiltration with small numbers of macrophages and CD4(+) T cells. Infiltration was even more modest in grafts in SCID and NOG mice.

CONCLUSIONS:

T cells play an important role in acute rejection of pig corneal xenografts in mice, although acute rejection is not solely the result of T-cell-mediated immunity. NK cells are less likely to be involved in the rejection process.

[Indexed for MEDLINE]

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