Host Pathogen Interactions
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Host-Pathogen Interactions
In recent decades, infectious diseases, once believed to be fairly contained, have become a vital, resurgent field of research. In Host-Pathogen Interactions: Methods and Protocols, top experts examine the relationship between the host and the pathogen, crucial in the outcome of an infection and the establishment of disease or asymptomatic, commensal colonization by organisms. The step-by-step laboratory methods and protocols of this volume study host-pathogen interaction, with a focus on fungal, bacterial and parasitic pathogens, at a molecular level in order to reveal the mechanisms of infection and to identify the vulnerabilities of the pathogen of interest. Written in the highly successful Methods in Molecular BiologyTM series format, the chapters feature brief subject introductions, lists of the necessary materials and reagents, and tips on troubleshooting and avoiding known pitfalls. Comprehensive and cutting-edge, Host-Pathogen Interactions: Methods and Protocols serves as an easy entry point for all those investigating the factors responsible for the pathogenicity of microorganisms.
Cell Signaling in Host–Pathogen Interactions: The Host Point of View
The ability of pathogens, such as parasites, bacteria, fungi and viruses to invade, persist and adapt in both invertebrate and vertebrate hosts is multifactorial and depends on both pathogen and host fitness. Communication between a pathogen and its host relies on a wide and dynamic array of molecular interactions. Through this constant communication most pathogens evolved to be relatively benign, whereas killing of its host by a pathogen represents a failure to adapt. Pathogens are lethal to their host when their interaction has not been long enough for adaptation. Evolution has selected conserved immune receptors that recognize signature patterns of pathogens as non-self elements and initiate host innate responses aimed at eradicating infection. Conversely, pathogens evolved mechanisms to evade immune recognition and subvert cytokine secretion in order to survive, replicate and cause disease. The cell signaling machinery is a critical component of the immune system that relays information from the receptors to the nucleus where transcription of key immune genes is activated. Host cells have developed signal transduction systems to maintain homeostasis with pathogens. Most cellular processes and cell signaling pathways are tightly regulated by protein phosphorylation in which protein kinases are key protagonists. Pathogens have developed multiple mechanisms to subvert important signal transduction pathways such as the mitogen activated protein kinase (MAPK) and the nuclear factor kB (NF-kB) pathways. Pathogens also secrete effectors that manipulate actin cytoskeleton and its regulators, hijack cell cycle machinery and alter vesicular trafficking. This research topic focuses on the cellular signaling mechanisms that are essential for host immunity and their subversion by pathogens.
Host-Pathogen Interactions
Although many insects successfully live in dangerous environments exposed to diverse communities of microbes, they are often exploited and killed by specialist pathogens. In the process of the co-evolution of insects and entomopathogenic microorganisms, they develop various adaptive systems that determine the sustainable existence of dynamic host–parasite interactions at both the organismic and population levels.