Abstract:
AIMS/HYPOTHESIS:High levels of inflammation locally in the graft during the initial days after transplantation can cause primary non-function (PNF) of grafted xenogeneic islets in NOD mice. The aim of this study was to explore in a model of spontaneous diabetes, the NOD mouse, the potential of anti-inflammatory agents in the prevention of PNF after xenogeneic islet transplantation. METHODS:Spontaneously diabetic NOD mice were transplanted with 300 rat islets. Animals were treated with acetylsalicylic acid (AsA), rofecoxib, TGF-beta or IL-1 receptor antagonist (IL-1ra). Intra-graft expression of inflammation-related molecules was measured by real time PCR 8 h post-transplantation. At the same time point, plasma nitrite levels were measured. RESULTS:Xenogeneic islets transplanted in control spontaneously diabetic mice resulted in PNF in 16 out of 38 mice (42%). Initial graft loss was not altered by administration of rofecoxib (30%) or TGF-beta (25%). AsA reduced the rate of rapid graft loss to 8% ( p<0.05 vs controls) and administration of IL-1ra even totally prevented PNF (0%, p<0.05 vs controls). Furthermore, all therapies prolonged the mean survival time of xenogeneic islet grafts. The inhibition of PNF by AsA was associated with decreased intra-islet levels of inflammation-related molecules (IL-1, TNF-alpha, iNOS, COX-2) and chemokines (MCP-1 and MIP-3alpha). Finally, also a diminished production of systemic nitrite levels was observed in AsA- and IL-1ra-treated islet recipients. CONCLUSIONS/INTERPRETATION:These data show that treatment with AsA or IL-1ra prevents PNF after islet transplantation in spontaneously diabetic NOD mice. Moreover, the involvement of non-specific inflammation is recognized in xenogeneic islet PNF in spontaneously diabetic NOD mice.
journal_name
Diabetologiajournal_title
Diabetologiaauthors
Gysemans C,Stoffels K,Giulietti A,Overbergh L,Waer M,Lannoo M,Feige U,Mathieu Cdoi
10.1007/s00125-003-1154-0subject
Has Abstractpub_date
2003-08-01 00:00:00pages
1115-23issue
8eissn
0012-186Xissn
1432-0428journal_volume
46pub_type
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