Introduction Platelet aggregation is a fundamental physiological process that plays a vital role in hemostasis, wound healing, and thrombosis. When vascular injury occurs, platelets rapidly adhere to the damaged endothelium, become activated, and clump together to form a platelet plug. This process […]
Introduction Stroke remains one of the leading causes of death and disability worldwide, placing a heavy burden on healthcare systems, communities, and families. According to the World Health Organization (WHO), stroke accounts for approximately 11% of total deaths globally and is a […]
Introduction Clopidogrel is an oral antiplatelet drug from the thienopyridine class. It is widely prescribed to prevent thrombotic cardiovascular events in patients with atherosclerosis, myocardial infarction (MI), ischemic stroke, or peripheral artery disease (PAD). Since its approval in the 1990s, it has […]
Introduction Protein citrullination, also known as deimination, is a post-translational modification (PTM) in which the amino acid arginine is converted into citrulline by the action of a family of enzymes known as peptidylarginine deiminases (PADs). This seemingly subtle biochemical modification can drastically […]
Shared Epitope Molecular Basis, Immunological Role, and Clinical Implications in Autoimmune Diseases
Introduction Autoimmune diseases develop when the immune system erroneously targets self-tissues, leading to chronic inflammation and tissue damage. Among the strongest genetic risk factors identified for autoimmune conditions, particularly rheumatoid arthritis (RA), are allelic variations of the HLA-DRB1 gene. The Shared Epitope […]
Introduction The human leukocyte antigen (HLA) system plays a fundamental role in adaptive immunity by presenting antigenic peptides to T lymphocytes. Among its components, the HLA-DRB1 gene stands out due to its extensive polymorphism and strong associations with autoimmune diseases. HLA-DRB1, located […]
Introduction The immune system plays a vital role in defending the body against pathogens while maintaining tolerance to self-antigens. A balanced immune response is crucial for protection without causing harm to host tissues. Immunoregulation refers to the mechanisms that control and modulate […]
Introduction Prevention is the cornerstone of sustainable health systems, safety measures, and social well-being. The concept of preventive strategies encompasses proactive actions taken to minimize risks, avoid harm, and mitigate potential negative outcomes in health, environment, and society. These strategies are essential […]
Introduction Disease susceptibility refers to the predisposition of an individual to develop a specific illness due to a combination of genetic, environmental, lifestyle, and immunological factors. While some individuals may remain resistant to pathogens or harmful stimuli, others exhibit heightened vulnerability, leading […]
Introduction Signal transducer and activator of transcription 4 (STAT4) is a member of the STAT family of transcription factors, which are essential mediators of cytokine signaling pathways. STAT4 is specifically activated by interleukin-12 (IL-12) and type I interferons, enabling the regulation of […]