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The Immune Response is a unique reference work covering the basic and clinical principles of immunology in a modern and comprehensive fashion.Written in an engaging conversational style, the book conveys the broad scope and fascinating appeal of immunology.The book is beautifully illustrated with superb figures as well as many full color plates.

PirB is an inhibitory cell surface receptor particularly prominent on myeloid cells. PirB curtails the phenotypes of activated macrophages during inflammation or tumorigenesis, but its functions in macrophage homeostasis are obscure. To elucidate PirB-related functions in macrophages at steady-state, we generated and compared single-cell RNA-sequencing (scRNAseq) datasets obtained from myeloid cell subsets of wild type (WT) and PirB-deficient knockout (PirB KO) mice. To facilitate this analysis, we developed a novel approach to clustering parameter optimization called “Cluster Similarity Scoring and Distinction Index” (CaSSiDI). We demonstrate that CaSSiDI is an adaptable computational framework that facilitates tandem analysis of two scRNAseq datasets by optimizing clustering parameters. We further show that CaSSiDI offers more advantages than a standard Seurat analysis because it allows direct comparison of two or more independently clustered datasets, thereby alleviating the need for batch-correction while identifying the most similar and different clusters. Using CaSSiDI, we found that PirB is a novel regulator of Cebpb expression that controls the generation of Ly6C lo patrolling monocytes and the expansion properties of peritoneal macrophages. PirB’s effect on Cebpb is tissue-specific since it was not observed in splenic red pulp macrophages (RPMs). However, CaSSiDI revealed a segregation of the WT RPM population into a CD68 lo Irf8 + “neuronal-primed” subset and an CD68 hi Ftl1 + “iron-loaded” subset. Our results establish the utility of CaSSiDI for single-cell assay analyses and the determination of optimal clustering parameters. Our application of CaSSiDI in this study has revealed previously unknown roles for PirB in myeloid cell populations. In particular, we have discovered homeostatic functions for PirB that are related to Cebpb expression in distinct macrophage subsets.

Experimental autoimmune encephalomyelitis (EAE) is a mouse model of multiple sclerosis (MS) in which Th17 cells have a crucial but unclear function. Here we show that choline acetyltransferase (ChAT), which synthesizes acetylcholine (ACh), is a critical driver of pathogenicity in EAE. Mice with ChAT-deficient Th17 cells resist disease progression and show reduced brain-infiltrating immune cells. ChAT expression in Th17 cells is linked to strong TCR signaling, expression of the transcription factor Bhlhe40, and increased Il2, Il17, Il22, and Il23r mRNA levels. ChAT expression in Th17 cells is independent of IL21r signaling but dampened by TGFβ, implicating ChAT in controlling the dichotomous nature of Th17 cells. Our study establishes a cholinergic program in which ACh signaling primes chronic activation of Th17 cells, and thereby constitutes a pathogenic determinant of EAE. Our work may point to novel targets for therapeutic immunomodulation in MS.

Cholinergic nerves are involved in tumor progression and dissemination. In contrast to other visceral tissues, cholinergic innervation in the hepatic parenchyma is poorly detected. It remains unclear whether there is any form of cholinergic regulation of liver cancer. Here, we show that cholinergic T cells curtail the development of liver cancer by supporting antitumor immune responses. In a mouse multihit model of hepatocellular carcinoma (HCC), we observed activation of the adaptive immune response and induction of two populations of CD4 + T cells expressing choline acetyltransferase (ChAT), including regulatory T cells and dysfunctional PD-1 + T cells. Tumor antigens drove the clonal expansion of these cholinergic T cells in HCC. Genetic ablation of Chat in T cells led to an increased prevalence of preneoplastic cells and exacerbated liver cancer due to compromised antitumor immunity. Mechanistically, the cholinergic activity intrinsic in T cells constrained Ca 2+ –NFAT signaling induced by T cell antigen receptor engagement. Without this cholinergic modulation, hyperactivated CD25 + T regulatory cells and dysregulated PD-1 + T cells impaired HCC immunosurveillance. Our results unveil a previously unappreciated role for cholinergic T cells in liver cancer immunobiology.

Twenty-first century organizations realize the importance of training and development in ensuring engagement with a younger workforce. By modernizing their training and development strategies, organizations may be successful in attracting and retaining millennial employees. The purpose of this transcendental phenomenological (descriptive) qualitative study was to understand the lived experiences of millennial employees with gamified training and development. This study centered on two research questions: What is the nature of the lived experiences of millennial employees when gamification is incorporated in their training and development; and what meaning do millennials ascribe to their lived experiences when using gamification methods in their training? A purposive sample of nine millennials living in the United States were interviewed via telephone. Data collected was grouped and analyzed for common themes using the modified van Kaam approach. The findings indicated that gamification was associated with feelings of playfulness, fun, excitement, accomplishment, and gratified competitiveness. Participants also expressed that gamification had helped them to overcome barriers to work socialization, and had improved their feelings about their employers when gamification seemed intended to benefit employees. Participants took their experiences of gamification to mean that their generation learned in different ways than earlier generations and that employers were finding appropriate ways to engage them by keeping pace with the evolution of content-delivery methods. The results of this study may help leaders and employers to engage millennial employees more effectively by using gamification to overcome barriers to collaboration, to promote collaboration, and by reinforcing in employee communications that gamified systems are to help maximize employee learning and development.

\"The Immune Response is a new and unique reference work covering the basic and clinical principles of immunology in a modern and comprehensive fashion. Written in an engaging and conversational style, the book conveys the broad scope and fascinating appeal of immunology. The book is illustrated with figures as well as many full color plates. This work will be a resource for lecturers and graduate students in immunology, as well as a vital reference for research scientists and clinicians studying related areas in the life and medical sciences.\"--Jacket.

Lecture Notes: Psychiatry provides a concise and accessible introduction to the fundamentals of Psychiatry, presenting the principles of Psychiatric examination followed by systematic coverage of the major psychiatric disorders, as well as covering management and treatment options. This eleventh edition has been revised to include recent developments in history-taking, psychotropic drugs and case presentations, as well as covering the practical elements of patient guidance and care. Key features include: • Clearly presented tables, figures and end-of-chapter 'Key point' summaries to aid revision • An emphasis on core management skills needed by Junior Doctors in both psychiatric and general hospital settings • Quick reference guides to help structure patient assessments on-the-go • MCQs and case studies in line with medical school and professional level psychiatry exams For those embarking on study or refreshing their knowledge of psychiatry, Lecture Notes: Psychiatry provides a step-by-step guide to both its wider and patient-centred practice.

Immunology is the study of the immune system. The immune system is the body's defense system against invasion by non-self entities, including infectious and inert agents, and tumor cells. The normal functioning of the immune system gives rise to immunity. Immunology overlaps more and more with the strictly delineated fields of pathology, biochemistry, and genetics. Immunology is complex and challenging, but it is also essential and fascinating. This chapter describes the involvement of the immune system in defense against pathogens and cancers and highlights its roles in promoting allergy, transplant rejection, and autoimmunity. It also discusses inherited and acquired defects in immunity as well as tumors arising in immune system cells. Thus, the chapter provides an understanding of the cellular and molecular mechanisms underlying immunity, how these mechanisms can go awry to cause disease, and how researchers seek to manipulate these mechanisms with the goal of ensuring good health for all. As the malfunction of the immune system underlies many aspects of human disease, including cancer, autoimmune disorders, allergy, hypersensitivity, transplantation rejection, and immunodeficiency, the immune system is therefore the central player in the maintenance of human health and disease.

Human immunodeficiency virus (HIV) is a cytopathic RNA retrovirus causing acquired immunodeficiency syndrome (AIDS) in human hosts. HIV is most commonly transmitted during sexual contact or intravenous drug use involving contaminated needles. Within the host, the interaction of the viral envelope protein gp120 with CD4 and host chemokine receptors allows the virus to enter both macrophages and CD4+T cells. Viral reverse transcriptase transcribes the viral RNA into a viral DNA that is integrated into the host genome to become the provirus. When the infected cell is stimulated, viral transcription and translation begin and copious amounts of newly synthesized virions bud from the host cell prior to its eventual lysis. The immune responses that occur during HIV infection include T helper (Th) cell responses, CTL responses, antibody responses, abnormal secretion of cytokines, production of the enzyme CEM-15 (APOBEC3G) and complement-mediated responses. The host factors that influence the course of HIV infection include host resistance to HIV infection and clinical course variability (expression of proteins, infection with other pathogens, and age at the time of infection). The cost to societies of the AIDS epidemic, in both human and economic terms, is already immense and predicted to increase astronomically. The only effective form of therapy is life-extending treatment with anti-retroviral drugs. Many barriers continue to thwart development of a successful HIV vaccine, including the extreme antigenic variation of the virus, the incapacitation of immune system cells following infection, and the lack of adequate in vitro and in vivo models of HIV infection.