M2 Macrophages Serve as Critical Executor of Innate Immunity in Chronic Allograft Rejection

Chronic allograft dysfunction: a model disorder of innate immunity.

The innate immune system is a highly sensitive organ of perception sensing any cell stress and tissue injury. Its major type of response to all potential inciting and dangerous challenges is inflammation and tissue repair and, if needed, induction of a supportive adaptive immune response, the aim always being to maintain homeostasis. However, although initially beneficial, innate immunity-media...

The role of innate immunity in acute allograft rejection after lung transplantation.

Although innate immunity is crucial to pulmonary host defense and can initiate immune and inflammatory responses independent of adaptive immunity, it remains unstudied in the context of transplant rejection. To investigate the role of innate immunity in the development of allograft rejection, we assessed the impact of two functional polymorphisms in the toll-like receptor 4 (TLR4) associated wi...

The innate immune system in allograft rejection and tolerance.

As T cells alone are both necessary and sufficient for the rejection of virtually all allogeneic tissues, much of transplantation immunology has focused on cells of the adaptive immune system. During the past decade, advances in our understanding of innate responses to pathogen-associated molecules have spurred a "rediscovery" of innate immunity. Fueled by this, an increasing body of literature...

Rejection and Tolerance The Innate Immune System in Allograft

Non-invasive molecular imaging of inflammatory macrophages in allograft rejection.

BACKGROUND Macrophages represent a critical cell type in host defense, development and homeostasis. The ability to image non-invasively pro-inflammatory macrophage infiltrate into a transplanted organ may provide an additional tool for the monitoring of the immune response of the recipient against the donor graft. We therefore decided to image in vivo sialoadhesin (Sn, Siglec 1 or CD169) using ...