scholarly journals Intranasal Immunization with SAG1 and Nontoxic Mutant Heat-Labile Enterotoxins Protects Mice againstToxoplasma gondii

2001 ◽  
Vol 69 (3) ◽  
pp. 1605-1612 ◽  
Author(s):  
C. Bonenfant ◽  
I. Dimier-Poisson ◽  
F. Velge-Roussel ◽  
D. Buzoni-Gatel ◽  
G. Del Giudice ◽  
...  
Keyword(s):  
Lymph Node ◽  
Mesenteric Lymph Node ◽  
Interleukin 2 ◽  
Mesenteric Lymph ◽  
Heat Labile ◽  
Intestinal Pathogens ◽  
Lymph Node Cells ◽  
High Level ◽  
Humoral Responses

ABSTRACT Effective protection against intestinal pathogens requires both mucosal and systemic immune responses. Intranasal administration of antigens induces these responses but generally fails to trigger a strong protective immunity. Mucosal adjuvants can significantly enhance the immunogenicities of intranasally administered antigens. Cholera toxin (CT) and heat-labile enterotoxin (LT) are strong mucosal adjuvants with a variety of antigens. Moreover, the toxicities of CT and LT do not permit their use in humans. Two nontoxic mutant LTs, LTR72 and LTK63, were tested with Toxoplasma gondii SAG1 protein in intranasal vaccination of CBA/J mice. Vaccination with SAG1 plus LTR72 or LTK63 induced strong systemic (immunoglobulin G [IgG]) and mucosal (IgA) humoral responses. Splenocytes and mesenteric lymph node cells from mice immunized with LTR72 plus SAG1, but not those from mice immunized with LTK63 plus SAG1, responded to restimulation with a T. gondii lysate antigen in vitro. Gamma interferon and interleukin 2 (IL-2) production by splenocytes and IL-2 production by mesenteric lymph node cells were observed in vitro after antigen restimulation, underlying a Th1-like response. High-level protection as assessed by the decreased load of cerebral cysts after a challenge with the 76K strain of T. gondiiwas obtained in the group immunized with LTR72 plus SAG1 and LTK63 plus SAG1. They were as well protected as the mice immunized with the antigen plus native toxins. This is the first report showing protection against a parasite by using combinations of nontoxic mutant LTs and SAG1 antigen. These nontoxic mutant LTs are now attractive candidates for the development of mucosally delivered vaccines.

Cyclopia Extracts Enhance Th1-, Th2-, and Th17-type T Cell Responses and Induce Foxp3+ Cells in Murine Cell Culture

Planta Medica ◽  
2017 ◽  
Vol 84 (05) ◽  
pp. 311-319 ◽  
Author(s):  
Shiho Murakami ◽  
Yutaka Miura ◽  
Makoto Hattori ◽  
Hiroshi Matsuda ◽  
Christiaan Malherbe ◽  
...  
Keyword(s):  
Lymph Node ◽  
Mesenteric Lymph Node ◽  
Hot Water ◽  
Immunostimulatory Activity ◽  
Murine Splenocytes ◽  
Enhanced Production ◽  
Mesenteric Lymph ◽  
Lymph Node Cells ◽  
Ifn Γ

Abstract Cyclopia genistoides, one of the traditional South African medicinal plants, and other species of the same genus offer noteworthy phenolic profiles, in particular high levels of the anti-allergic xanthone mangiferin. Hot water and 40% ethanol-water (v/v) extracts, prepared from C. genistoides, Cyclopia subternata, and Cyclopia maculata, were tested for immune-regulating activity in vitro using murine splenocytes and mesenteric lymph node cells. The 40% ethanol-water extracts of C. genistoides and C. subternata significantly enhanced production of several types of cytokines, including IL-4, IL-17, and IFN-γ, by antigen-stimulated splenocytes. A concentration-dependent response was observed, noticeably for IFN-γ production. The activity of the extracts did not correlate with the content of any of the major phenolic compounds, indicative that other extract constituents also play a role in immunomodulation. Additionally, the increased ratio of CD4+CD25+Foxp3+ Treg cells to total CD4+ cells indicated induction of Foxp3+ cells when mesenteric lymph node cells were cultured in the presence of these two extracts. This study is the first reporting immunostimulatory activity for Cyclopia, which are widely consumed as the herbal tea known as honeybush, underpinning further investigations into the potential use of its extracts as adjuvants for mucosal immunotherapy.

scholarly journals Swine Interleukin 2 Activity Produced by Mesenteric Lymph Node Cells.

1993 ◽  
Vol 55 (5) ◽  
pp. 729-734 ◽  
Author(s):  
Hiroyuki IWATA ◽  
Tatsuo UEDA ◽  
Kyoko TAKAYANAGI ◽  
Mutsumi WADA ◽  
Takeshi INOUE
Keyword(s):  
Lymph Node ◽  
Mesenteric Lymph Node ◽  
Interleukin 2 ◽  
Mesenteric Lymph ◽  
Lymph Node Cells

Evidence for the involvement of a bone marrow-derived cell population in the immune expulsion ofTrichinella spiralis

Parasitology ◽  
1977 ◽  
Vol 74 (3) ◽  
pp. 225-234 ◽  
Author(s):  
D. Wakelin ◽  
Margaret M. Wilson
Keyword(s):  
Bone Marrow ◽  
Lymph Node ◽  
Cell Population ◽  
Mesenteric Lymph Node ◽  
Trichinella Spiralis ◽  
Mesenteric Lymph ◽  
Lymph Node Cells

When mice were irradiated immediately before infection withTrichinella spiralisthere was a profound and long-lasting interference with their ability to expel adult worms from the intestine. Irradiation given after the fifth day of infection was progressively less effective in this respect. The ability to expel worms was not restored when mesenteric lymph node cells (MLNC) were transferred (a) on the day of infection in mice irradiated one day previously, or (b) on day 7 of an infection in mice irradiated on day 6, even though the MLNC transferred immunity to intact recipients. Transfer of bone marrow (BM) alone was also without effect. However, worm explusion was restored if, following irradiation and injection of BM, 10 days were allowed for BM differentiation before transfer of MLNC. This restoration was effective even after lethal levels of irradiation and was clearly dependent upon a donor-derived BM component cooperating with, or responding to, the activity of the transferred MLNC. The possibility that the BM component is non-lymphoid in nature is discussed.

Dietary effects on insulin and nutrient metabolism in mesenteric lymph node cells, splenocytes, and pancreatic islets of BB rats

Metabolism ◽  
2000 ◽  
Vol 49 (9) ◽  
pp. 1111-1117 ◽  
Author(s):  
Fraser W. Scott ◽  
Elizabeth Olivares ◽  
Abdullah Sener ◽  
Willy J. Malaisse
Keyword(s):  
Lymph Node ◽  
Pancreatic Islets ◽  
Mesenteric Lymph Node ◽  
Nutrient Metabolism ◽  
Dietary Effects ◽  
Mesenteric Lymph ◽  
Bb Rats ◽  
Lymph Node Cells

scholarly journals Adoptive transfer of nontransgenic mesenteric lymph node cells induces colitis in athymic HLA-B27 transgenic nude rats

2006 ◽  
Vol 143 (3) ◽  
pp. 474-483 ◽  
Author(s):  
F. Hoentjen ◽  
S. L. Tonkonogy ◽  
B. Liu ◽  
R. B. Sartor ◽  
J. D. Taurog ◽  
...  
Keyword(s):  
Lymph Node ◽  
Adoptive Transfer ◽  
Mesenteric Lymph Node ◽  
Hla B27 ◽  
Mesenteric Lymph ◽  
Nude Rats ◽  
Lymph Node Cells
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