Pattern recognition receptors (PRRs) play a crucial role in the proper function of the innate immune system. PRRs are germline-encoded host sensors, which detect molecules typical for the pathogens. They are proteins expressed mainly by cells of the innate immune system, such as dendritic cells, macrophages, monocytes, neutrophils, as well as by epithelial cells, to identify two classes of molecules: pathogen-associated molecular patterns (PAMPs), which are associated with microbial pathogens, and damage-associated molecular patterns (DAMPs), which are associated with components of host's cells that are released during cell damage or death. They are also called primitive pattern recognition receptors because they evolved before other parts of the immune system, particularly before adaptive immunity. PRRs also mediate the initiation of antigen-specific adaptive immune response and release of inflammatory cytokines.
Dermot P. Kelleher FMedSci is the Dean of the Faculty of Medicine and Vice-President, Health at the University of British Columbia in Vancouver, Canada.
Myeloid differentiation primary response 88 (MYD88) is a protein that, in humans, is encoded by the MYD88 gene. originally discovered in the laboratory of Dan A. Liebermann as a Myeloid differentiation primary response gene.
Toll-like receptor 4 (TLR4), also designated as CD284, is a key activator of the innate immune response and plays a central role in the fight against bacterial infections. TLR4 is a transmembrane protein of approximately 95 kDa that is encoded by the TLR4 gene.
Interleukin-1 receptor-associated kinase-like 2 is an enzyme that in humans is encoded by the IRAK2 gene.
Anne O'Garra FRS FMedSci is a British immunologist who has made important discoveries on the mechanism of action of Interleukin 10.
Opsona Therapeutics was a drug development company specialising in the human immune system and new drugs and vaccines to prevent and treat autoimmune/inflammatory conditions, cancers and infectious diseases.
The Interleukin-1 family is a group of 11 cytokines that plays a central role in the regulation of immune and inflammatory responses to infections or sterile insults.
miR-146 is a family of microRNA precursors found in mammals, including humans. The ~22 nucleotide mature miRNA sequence is excised from the precursor hairpin by the enzyme Dicer. This sequence then associates with RISC which effects RNA interference.
Interleukin 1 receptor-like 1, also known as IL1RL1 and ST2, is a protein that in humans is encoded by the IL1RL1 gene.
Members of the very wide interleukin-1 receptor (IL-1R) family are characterized by extracellular immunoglobulin-like domains and intracellular Toll/Interleukin-1R (TIR) domain. It is a group of structurally homologous proteins, conserved throughout the species as it was identified from plants to mammals. Proteins of this family play important role in host defence, injury and stress. There are four main groups of TIR domain-containing proteins in animals; Toll-like receptors, Interleukin-1 receptor (IL-1R), cytosolic adaptor proteins and insect and nematode Toll. Each of these groups is involved mainly in host defence; Toll receptors are also involved in embryogenesis.
Brigitta Stockinger, FMedSci, FRS, is a molecular immunologist in the Francis Crick Institute in London. Stockinger's lab focus on understanding how certain immune cells, called T cells, develop and function as well as investigating how diet and other environmental factors can affect the way the immune system works.
Akiko Iwasaki is a Sterling Professor of Immunobiology and Molecular, Cellular and Developmental Biology at Yale University. She is also a principal investigator at the Howard Hughes Medical Institute. Her research interests include innate immunity, autophagy, inflammasomes, sexually transmitted infections, herpes simplex virus, human papillomavirus, respiratory virus infections, influenza infection, T cell immunity, commensal bacteria, COVID-19, and long COVID.
The interleukin-1 receptor (IL-1R) associated kinase (IRAK) family plays a crucial role in the protective response to pathogens introduced into the human body by inducing acute inflammation followed by additional adaptive immune responses. IRAKs are essential components of the Interleukin-1 receptor signaling pathway and some Toll-like receptor signaling pathways. Toll-like receptors (TLRs) detect microorganisms by recognizing specific pathogen-associated molecular patterns (PAMPs) and IL-1R family members respond the interleukin-1 (IL-1) family cytokines. These receptors initiate an intracellular signaling cascade through adaptor proteins, primarily, MyD88. This is followed by the activation of IRAKs. TLRs and IL-1R members have a highly conserved amino acid sequence in their cytoplasmic domain called the Toll/Interleukin-1 (TIR) domain. The elicitation of different TLRs/IL-1Rs results in similar signaling cascades due to their homologous TIR motif leading to the activation of mitogen-activated protein kinases (MAPKs) and the IκB kinase (IKK) complex, which initiates a nuclear factor-κB (NF-κB) and AP-1-dependent transcriptional response of pro-inflammatory genes. Understanding the key players and their roles in the TLR/IL-1R pathway is important because the presence of mutations causing the abnormal regulation of Toll/IL-1R signaling leading to a variety of acute inflammatory and autoimmune diseases.
Katherine A. Fitzgerald is an Irish-born American molecular biologist and virologist. She is a professor of medicine currently working in the Division of Infectious Disease at the University of Massachusetts Medical School. She is also the director of the Program in Innate Immunity.
Inflammaging is a chronic, sterile, low-grade inflammation that develops with advanced age, in the absence of overt infection, and may contribute to clinical manifestations of other age-related pathologies. Inflammaging is thought to be caused by a loss of control over systemic inflammation resulting in chronic overstimulation of the innate immune system. Inflammaging is a significant risk factor in mortality and morbidity in aged individuals.
Tania H. Watts is a Canadian Immunologist, Professor at the University of Toronto, past President of the Canadian Society for Immunology and from 2009-2019 held the Sanofi Pasteur Chair in Human Immunology at the University of Toronto. Tania Watts holds a Tier 1 Canada Research Chair in Anti-viral Immunity and was named a Distinguished Fellow of the American Association of Immunologists, class of 2022.
Mihai G. Netea is a Romanian Dutch physician and professor at Radboud University Nijmegen, specialized in infectious disease, immunology, and global health.
Vishva Mitra Dixit is a physician of Indian origin who is currently Vice President and Senior Fellow of Physiological Chemistry and Research Biology at Genentech.
Seamus J. Martin is an Irish molecular biologist and immunologist working at The Smurfit Institute of Genetics in Trinity College Dublin. Since 1999, he has held the Smurfit Chair of Medical Genetics at Trinity College Dublin, and his research focuses on the links between cell death, cell stress, and inflammation. Martin is known for his contributions to understanding the molecular control of the mode of regulated cell death known as apoptosis. Martin received the 'GlaxoSmithKline Award' of the Biochemical Society in 2006, the British Science Association's 'Charles Darwin Award' in 2005, and The 'RDS-Irish Times Boyle Medal' in 2014, for his work on deciphering the role of caspases in apoptosis. In 2006, he was elected to the Royal Irish Academy, in 2009 he awarded EMBO Membership, and in 2023 he was elected to the Academia Europaea. His research work is widely cited and he received a European Research Council Advanced Research award in 2021.
