Utilization of lipopolysaccharide challenge in cynomolgus macaques to assess IL-10 receptor antagonism.

The current era of drug discovery has been marked by a significant increase in the development of immune modulating agents to address a range of diseases such as cancer, chronic inflammation, and other conditions of dysregulated immunity. Non-clinical evaluation of these agents in animal models can be challenging, as the presence of an active immune state is often required in order to detect the effects of the test agent. Modulation of interleukin (IL)-10 signaling represents this type of situation in that altering IL-10 action can be difficult to appreciate in the absence of an ongoing immune response.

Anti-interleukin-10R1 monoclonal antibody enhances bacillus Calmette-Guérin induced T-helper type 1 immune responses and antitumor immunity in a mouse orthotopic model of bladder cancer.

Purpose: Proper induction of the T-helper type 1 immune response is required for effective bacillus Calmette-Guérin immunotherapy for bladder cancer. Interleukin-10 down-regulates the T-helper 1 response and is associated with bacillus Calmette-Guérin failure. We investigated whether blocking interleukin-10 receptor 1 would enhance the bacillus Calmette-Guérin induced T-helper type 1 immune response and anti-bladder cancer immunity in a mouse model.

A new subtype of Hodgkin's lymphoma, syncytial nodular sclerosing: first case report of primary small bowel lymphoma.

Introduction: Gastrointestinal lymphomas may arise as a component of systemic disease with GI involvement or primary neoplasm. The diagnosis of primary GI lymphoma requires the lack of peripheral or mediastinal lymphadenopathy, normal white blood cell count, and differential on the peripheral blood smear; tumor involvement must be predominantly in the GI tract, and no evidence of liver or spleen involvement. The small bowel accounts for approximately 9% of the GI lymphomas.

H5N1 vaccine-specific B cell responses in ferrets primed with live attenuated seasonal influenza vaccines.

Background: Live attenuated influenza H5N1 vaccines have been produced and evaluated in mice and ferrets that were never exposed to influenza A virus infection (Suguitan et al., Plos Medicine, e360:1541, 2006). However, the preexisting influenza heterosubtypic immunity on live attenuated H5N1 vaccine induced immune response has not been evaluated.

Lymphoid reservoirs of antigen-specific memory T helper cells.

How vaccines control the development of antigen-specific effector and memory T helper cells is central to protective immunity but remains poorly understood. Here we found that protein vaccination selected high-affinity, CXCR5+ICOS(hi) follicular B-helper T cells (T(FH) cells) that developed in draining lymphoid tissue to regulate B cell responses. In the memory phase, reservoirs of antigen-specific CXCR5+ICOS(lo) T(FH) cells persisted with less effector activity but accelerated antigen-recall ability.