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. 1995 Mar;63(3):1122–1126. doi: 10.1128/iai.63.3.1122-1126.1995

Lipopolysaccharide-induced apoptosis in swine lymphocytes in vivo.

M Norimatsu 1, T Ono 1, A Aoki 1, K Ohishi 1, T Takahashi 1, G Watanabe 1, K Taya 1, S Sasamoto 1, Y Tamura 1
PMCID: PMC173120  PMID: 7868236

Abstract

The in vivo effects of bacterial lipopolysaccharide (LPS) on the immune systems of piglets were investigated. Intravenous injection of 0.5 mg of LPS per kilogram of body weight induced apoptosis, which was characterized by nuclear chromatin condensation and fragmentation and a ladder formation of nucleosomal DNA in lymphocytes both in the cortex of the thymus and in the germinal centers and paracortical areas of mesenteric lymph nodes at 24 h postinjection. The levels of endotoxin, tumor necrosis factor alpha, and cortisol in serum increased, generally according to the dose of LPS. These findings suggest that LPS can induce in vivo apoptosis of lymphocytes in piglets and support the notion that cytokine and endocrine responses may play an important role in LPS-induced apoptosis in the immune system.

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Selected References

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