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Endogenous ADP-Ribosylation
This volume gathers the latest exciting findings on ADP-ribosylation from renowned experts in the field. It includes ten chapters, organized into the following three thematic sections: · Evolution and detection of endogenous ADP-ribosylation · ADP-ribosylation by the ARTC family of ADP-ribosyltransferases (R-S-E ARTs) · ADP-ribosylation by the ARTD family of ADP-ribosyltransferases (H-Y-E ARTs) The book will provide readers a better understanding of ADP-ribosylating toxins and their endogenous relatives. This provides a basis for developing novel toxin-neutralizing drugs and drugs targeting endogenous ADP-ribosyltransferase relatives.
ADP-Ribosylation in Animal Tissues
Proceedings of an international workshop held in Hamburg, Germany, May 19-23, 1996
Selection of Nanobodies that Block the Enzymatic and Cytotoxic Activities of the Binary Clostridium Difficile Toxin CDT
Abstract: The spore-forming gut bacterium Clostridium difficile is the leading cause of antibiotic-associated diarrhea in hospitalized patients. The major virulence factors are two large glucosylating cytotoxins. Hypervirulent strains (e.g. ribotype 027) with higher morbidity and mortality additionally produce the binary CDT toxin (Clostridium difficile transferase) that ADP-ribosylates actin and induces microtubule-based cell protrusions. Nanobodies are robust single domain antibodies derived from camelid heavy chain antibodies. Here we report the generation of functional nanobodies against the enzymatic CDTa and the heptameric receptor binding subunit CDTb. The nanobodies were obtained from a variable-domain repertoire library isolated from llamas immunized with recombinant CDTa or CDTb. Five CDTa-specific nanobodies blocked CDTa-mediated ADP-ribosylation of actin. Three CDTa-specific and two CDTb-specific nanobodies neutralized the cytotoxicity of CDTa+b. These nanobodies hold promise as new tools for research, diagnosis and therapy of C. difficile associated disease
Single-Domain Antibodies: Biology, Engineering and Emerging Applications
Single-domain antibodies (sdAbs) represent the minimal antigen binding-competent form of the immunoglobulin domain and have unique properties and applications. SdAbs are naturally produced as the variable domains of the heavy chain-only antibodies of camelid ruminants and cartilaginous fishes, but can also be engineered synthetically from autonomous human or mouse VH or VL domains. The scope of this research topic and associated e-book covers current understanding and new developments in (i) the biology, immunology and immunogenetics of sdAbs in camelids and cartilaginous fishes, (ii) strategies for sdAb discovery, (iii) protein engineering approaches to increase the solubility, stability and antigen-binding affinity of sdAbs and (iv) specialized applications of sdAbs in areas such diagnostics, imaging and therapeutics.
Tissue-Resident Memory T Cells
Tissue-resident memory T (TRM) cells play a major role in control of viral infections. Their involvement in cancer diseases has been more recently demonstrated. This non-circulating T-lymphocyte subset lacks molecules enabling egress from the tissue and migration to lymph nodes, expresses specific markers of residency and displays specific transcription factors. The present special issue elucidates our current knowledge on CD8+ TRM cells and explores less frequently described resident subsets, such as CD4+ TRM and innate-like cells, as well as their specific metabolism and niches for their formation in infectious and cancer diseases.
