Abstract:
:To elucidate the mechanism of enhancing survival in peritonitis rats treated with lentinan, a fully purified beta-1,3-glucan, we measured the active oxygen-producing ability of polymorphonuclear leukocytes (PMNs). Four groups of rats (group I, fecal peritonitis control; II, rats receiving 3 mg/kg lentinan intraperitoneally at the same time as peritonitis induction; III, rats receiving 1 mg/kg gentamicin intramuscularly; and IV, rats receiving combined lentinan-gentamicin treatment) were used. The survival period was significantly longer in group IV than in the other three groups. The ability of ascitic PMNs to produce active oxygen (superoxide, H2O2, myeloperoxidase) was significantly more than that of blood PMNs in each group at 20 h after peritonitis induction. The increase in active oxygen production in ascitic PMNs was higher in group IV compared with that in the other three groups. The concentration of lentinan in the blood was high at 24 h after administering lentinan intraperitoneally to both the normal and peritonitis rats. In the in vitro study, the superoxide production in normal rat blood PMNs was significantly higher in the presence of cytokines (IL-1 beta, IL-6, TNF-alpha) without dose-dependence but was not higher for the lentinan group than in the control. This study therefore suggests that lentinan activated the peritoneal macrophage secretory activity and produced cytokines which thus enhanced the ability of PMNs to produce active oxygen, which possesses a bactericidal ability in PMNs.
journal_name
Surg Todayjournal_title
Surgery todayauthors
Shen SC,Nakao A,Kishimoto W,Harada A,Nonami T,Nakano M,Takagi Hdoi
10.1007/BF00311908subject
Has Abstractpub_date
1993-01-01 00:00:00pages
603-8issue
7eissn
0941-1291issn
1436-2813journal_volume
23pub_type
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