title: The appearance and role of gamma delta T cells in the peritoneal cavity and liver during primary infection with Listeria monocytogenes in rats.
abstract: We have previously reported that gamma delta T cells play important roles in protection during the early stage of infection with Listeria monocytogenes in mice. To generalize the protective roles of gamma delta T cells in listerial infection to different species, we examined the appearance of gamma delta T cells during infection with L. monocytogenes in Fisher F344 rats. The numbers of bacteria in the peritoneal cavity and liver increased to a maximum level on day 3 and then decreased to an undetectable level by day 10 after an intraperitoneal infection with a sublethal dose (1 x 10(8)) of viable L. monocytogenes in rats. CD3+ alpha beta- T cells in the peritoneal cavity and liver began to increase on day 3, reached a maximum level on day 6, and thereafter decreased gradually by day 10 after infection. Northern blot analysis confirmed that the CD3+ alpha beta- T cells expressed TCR delta and gamma gene messages. In vivo treatment with anti-TCR alpha beta mAb, which suppressed most of the alpha beta T cells in the periphery and impaired resistance during the late stage of listerial infection, did not affect the host defense by day 6 after infection. A significantly increased number of gamma delta T cells was detected in the peritoneal cavity of the TCR alpha beta-suppressed rats on day 6 after infection. These results suggest that the early appearing gamma delta T cells may contribute to the host defense at a relatively early stage during listeriosis in rats.
authors: Laboratory of Germfree Life, Nagoya University School of Medicine, Japan.
authors: T
authors: T
authors: Hasegawa
authors: T
authors: T
authors: Tanaka
authors: Y
authors: Y
authors: Yoshikai
mesh_terms: D000818:Animals; D017252:CD3 Complex / Q000032:analysis; D008089:Listeria monocytogenes / Q000254:growth & development / Q000302:isolation & purification; D008088:Listeriosis / Q000276:immunology* / Q000382:microbiology / Q000473:pathology; D008099:Liver / Q000276:immunology* / Q000382:microbiology / Q000473:pathology; D008297:Male; D010529:Peritoneal Cavity / Q000382:microbiology / Q000473:pathology*; D051381:Rats; D011916:Rats, Inbred F344 / Q000276:immunology; D011923:Rats, Nude / Q000276:immunology; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000032:analysis; D016692:Receptors, Antigen, T-Cell, gamma-delta / Q000032:analysis*; D016176:T-Lymphocyte Subsets
chemical_list: D017252:CD3 Complex; D016693:Receptors, Antigen, T-Cell, alpha-beta; D016692:Receptors, Antigen, T-Cell, gamma-delta