2,237 research outputs found
Partitioning a graph into highly connected subgraphs
Given , a -proper partition of a graph is a partition
of such that each part of induces a
-connected subgraph of . We prove that if is a graph of order
such that , then has a -proper partition with at
most parts. The bounds on the number of parts and the minimum
degree are both best possible. We then prove that If is a graph of order
with minimum degree , where
, then has a -proper partition into at most
parts. This improves a result of Ferrara, Magnant and
Wenger [Conditions for Families of Disjoint -connected Subgraphs in a Graph,
Discrete Math. 313 (2013), 760--764] and both the degree condition and the
number of parts are best possible up to the constant
Graft versus host disease (GVHD) after BN to LEW compared to LEW to BN rat intestinal transplantation under FK 506
Graft-versus-host disease in fully allogeneic small bowel transplantation: incidence of the disease and strain combinations.
Lymphocyte traffic and graft-versus-host disease after fully allogeneic small bowel transplantation
Control of multi-joint arm movements for the manipulation of touch in keystroke by expert pianists
Comparison of the small intestine after multivisceral transplantation with the small intestines transplanted with portal or caval drainage
WWP1 knockout in mice exacerbates obesity-related phenotypes in white adipose tissue but improves whole-body glucose metabolism
Preformed lymphocytotoxic antibodies: The effects of class, titer and specificity on liver vs. heart allografts
The effect on liver and heart allograft survival (ACI rats to Lewis rats) was studied after three methods of recipient presensitization and after different intervals between sensitization and transplantation. With comparable lymphocytotoxic antibody titers, liver allografts always survived longer than heart grafts. The titer, class and specificity of the antibodies varied with the method of sensitization. Four skin grafts produced IgG and IgM lymphocytotoxic antibody titers of 1:2,000 to 4,000. The IgG fraction was shown to have hepatic vascular endothelial specificity by indirect immunofluorescence. These primed recipients hyperacutely rejected both heart and liver allografts, which showed vascular deposition of IgG antibodies. Survival of either kind of graft was inversely proportional to the lymphocytotoxic antibody titer and length of time after placement of the last skin graft. Presensitization with a single heterotopic heart graft produced an even higher mixed IgG and IgM lymphocytotoxic antibody titer of 1:8,000 but with less IgG vascular endothelial specificity. These animals also hyperacutely rejected heart or liver grafts with tissue deposition of IgG but less consistently and with a weaker correlation with lymphocytotoxic antibody titers and time after sensitization. Sensitization with two pretransplant blood transfusions produced the lowest titer (1:500 to 1,000) and the least IgG vascular endothelial specificity. Liver allograft survival was routinely enhanced in these animals, and little effect was seen on heart grafts. Collectively, the experiments showed that the liver is not only resistant to antibody‐mediated rejection relative to the heart but is more easily enhanced. A more precise characterization of preformed antibodies may increase the ability to predict the outcome of liver transplantation in sensitized recipients or guide pretransplant strategies to foster enhancing antibodies. Copyright © 1992 American Association for the Study of Liver Disease
- …