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This article briefly describes natural killer cells and their role in immune defense. Natural killer (NK) cells are a specialized population of innate lymphoid cells that play a fundamental role in protecting the body against infections and malignant transformation. Unlike antigen-specific lymphocytes, NK cells can rapidly recognize and eliminate abnormal cells without prior sensitization, making … Read more >>
This article describes the fundamental differences between the immune responses mounted against extracellular and intracellular bacterial pathogens. The immune system employs distinct defense strategies depending on the location and lifestyle of the invading bacteria, ensuring their effective recognition, containment, and elimination. While extracellular bacteria are primarily targeted by antibody-mediated mechanisms, intracellular bacteria require robust cell-mediated … Read more >>
This article provides a brief overview of the pivotal role of the complement system during the contraction phase of the immune response. It highlights how complement orchestrates the efficient clearance of apoptotic cells, apoptotic bodies, and immune complexes, thereby promoting the resolution of inflammation, preserving self-tolerance, and preventing the development of autoimmune diseases. The complement … Read more >>
In this article, I briefly describe the generation of peripheral tolerance. It refers to the mechanisms that regulate self-reactive lymphocytes after they leave the primary lymphoid organs. It ensures that immune responses against the body’s own tissues are prevented through processes such as anergy, suppression by regulatory cells, and controlled antigen presentation. These mechanisms help … Read more >>
In this article, I briefly describe the central tolerance in primary lymphoid organs. Central tolerance is a fundamental immunological mechanism that ensures self-tolerance by regulating lymphocyte development. It is established within primary lymphoid organs, where self-reactive T and B lymphocytes are eliminated, modified, or redirected into regulatory pathways. This process is essential for maintaining immune … Read more >>
In this article, I briefly describe the role of Fc receptors in antibody effector functions. Fc receptors (FcRs) are specialized cell-surface receptors that bind to the Fc region of antibodies and link humoral immunity with cellular immune responses. By interacting with different antibody classes, FcRs regulate key immune functions, such as phagocytosis, cytotoxicity, inflammation, and … Read more >>
In this article, I briefly describe how genetic predisposition and environmental exposures interact to drive the development of Type I hypersensitivity (allergic) diseases. Type I hypersensitivity, commonly known as allergy, is an IgE-driven immune disorder characterized by exaggerated responses to otherwise harmless environmental antigens. Its development is influenced by a complex interaction between genetic predisposition … Read more >>
In this article, I briefly describe the induction of immune tolerance in organ transplantation. The process of organ transplantation remains limited by immune-mediated graft rejection, prompting extensive efforts to understand and control host immune responses. Allograft Acceptance Without Immunosuppression The recipient’s immune system may occasionally accept an allograft with minimal or no immunosuppressive therapy. This … Read more >>
In this article, I briefly describe the types of therapeutic approaches to immune suppression. Therapeutic approaches to immune suppression encompass a broad range of strategies designed to prevent or modulate the host’s immune response against transplanted tissues. These interventions target key cellular and molecular pathways involved in allorecognition, aiming to preserve graft function while minimizing … Read more >>
In this article, I briefly describe the immunological mechanisms underlying graft rejection. Graft rejection is a complex immune reaction in which the recipient’s immune system identifies the transplanted tissue as foreign and mounts a defense against it. Understanding the immunological pathways underlying this response, from T-cell activation to antibody-mediated injury, is essential for improving transplant … Read more >>