Mechanism for the Instant Blood-Mediated Inflammatory Reaction in Rat Islet Transplantation.

Abstract:

OBJECTIVE:The purpose of this study was to investigate the mechanisms involved in the development of instant blood-mediated inflammatory reaction (IBMIR) triggered by pancreatic islet transplantation in an in vitro system. MATERIALS AND METHODS:Pancreatic islets were prepared and blood was taken from male and female Wistar rats. An in vitro heparinized tubing loop model on a rocking device that was placed in a 37°C incubator was used to generate blood flow inside the loops. Rat blood was added to the device, and after a 60-minute incubation period, 800 islet equivalents were added to the system. Rat blood samples were taken for immediate hematologic analysis before circulation, before the addition of islets, and 5, 15, 30, and 60 minutes after the addition of islets. After 60 minutes, the blood in the tubing was filtered, and the filtrate was stained using hematoxylin and eosin for microscopic analysis. RESULTS:Following the addition of islets, the counts of platelets, white blood cells, and mononuclear cells were significantly decreased at 60 min (P < .05), and the plasma levels of thrombin-antithrombin complexes and complement C3a were significantly increased (P < .05). At 60 minutes after introduction of the islets, the thrombi and tissue in the remaining blood in the device consisted of a few islets with serious structural damage and incomplete capsules, and there were many microthrombi with a large number of infiltrating neutrophils around the islets. CONCLUSION:Our in vitro model of IBMIR was characterized by platelet consumption, activation of the coagulation and complement cascade systems, and leukocytic infiltration.

journal_name

Transplant Proc

authors

Cheng Y,Wang B,Li H,Zhao N,Liu Y

doi

10.1016/j.transproceed.2017.03.090

subject

Has Abstract

pub_date

2017-01-01 00:00:00

pages

1440-1443

issue

6

eissn

0041-1345

issn

1873-2623

pii

S0041-1345(17)30328-7

journal_volume

49

pub_type

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