Mechanistic perspectives on anti-aminoacyl-tRNA synthetase syndrome. 2023

Sachiko Kanaji, and Wenqian Chen, and Yosuke Morodomi, and Ryan Shapiro, and Taisuke Kanaji, and Xiang-Lei Yang
Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA.

Antisynthetase syndrome (ASSD) is an autoimmune disease characterized by circulating autoantibodies against one of eight aminoacyl-tRNA synthetases (aaRSs). Although these autoantibodies are believed to play critical roles in ASSD pathogenesis, the nature of their roles remains unclear. Here we describe ASSD pathogenesis and discuss ASSD-linked aaRSs - from the WHEP domain that may impart immunogenicity to the role of tRNA in eliciting the innate immune response and the secretion of aaRSs from cells. Through these explorations, we propose that ASSD pathogenesis involves the tissue-specific secretion of aaRSs and that extracellular tRNAs or tRNA fragments and their ability to engage Toll-like receptor signaling may be important disease factors.

UI MeSH Term Description Entries
D009220 Myositis Inflammation of a muscle or muscle tissue. Inflammatory Myopathy,Myositis, Focal,Myositis, Infectious,Idiopathic Inflammatory Myopathies,Idiopathic Inflammatory Myopathy,Idiopathic Inflammatory Myositis,Infectious Myositis,Inflammatory Muscle Diseases,Inflammatory Myopathies, Idiopathic,Inflammatory Myopathy, Idiopathic,Muscle Diseases, Inflammatory,Myopathies, Idiopathic Inflammatory,Myopathy, Inflammatory,Myositis, Proliferative,Focal Myositides,Focal Myositis,Infectious Myositides,Inflammatory Muscle Disease,Inflammatory Myopathies,Muscle Disease, Inflammatory,Myopathies, Inflammatory,Myopathy, Idiopathic Inflammatory,Myositides,Myositides, Focal,Myositides, Infectious,Myositides, Proliferative,Proliferative Myositides,Proliferative Myositis
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000604 Amino Acyl-tRNA Synthetases A subclass of enzymes that aminoacylate AMINO ACID-SPECIFIC TRANSFER RNA with their corresponding AMINO ACIDS. Amino Acyl T RNA Synthetases,Amino Acyl-tRNA Ligases,Aminoacyl Transfer RNA Synthetase,Aminoacyl-tRNA Synthetase,Transfer RNA Synthetase,tRNA Synthetase,Acyl-tRNA Ligases, Amino,Acyl-tRNA Synthetases, Amino,Amino Acyl tRNA Ligases,Amino Acyl tRNA Synthetases,Aminoacyl tRNA Synthetase,Ligases, Amino Acyl-tRNA,RNA Synthetase, Transfer,Synthetase, Aminoacyl-tRNA,Synthetase, Transfer RNA,Synthetase, tRNA,Synthetases, Amino Acyl-tRNA
D001323 Autoantibodies Antibodies that react with self-antigens (AUTOANTIGENS) of the organism that produced them. Autoantibody
D012343 RNA, Transfer The small RNA molecules, 73-80 nucleotides long, that function during translation (TRANSLATION, GENETIC) to align AMINO ACIDS at the RIBOSOMES in a sequence determined by the mRNA (RNA, MESSENGER). There are about 30 different transfer RNAs. Each recognizes a specific CODON set on the mRNA through its own ANTICODON and as aminoacyl tRNAs (RNA, TRANSFER, AMINO ACYL), each carries a specific amino acid to the ribosome to add to the elongating peptide chains. Suppressor Transfer RNA,Transfer RNA,tRNA,RNA, Transfer, Suppressor,Transfer RNA, Suppressor,RNA, Suppressor Transfer

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