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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact

chemokine --- CVB3 --- Hantavirus --- hcmv --- HIV --- Inflammation --- influenza --- interferon

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Cardiovascular disease (CVD) is the most common cause of morbidity and mortality worldwide, putting a major burden on life quality and social health care systems. Type 2 diabetes mellitus (T2DM) and chronic kidney disease (CKD) have been identified as important risk factors for CVD, severely increasing the risk on e.g. myocardial infarction, and cardiovascular complications constitute the main cause of death in patients presenting with T2DM, CKD or a combination of both. As these pathologies are expected to rise alarmingly in the next decades, a better understanding of molecular and cellular mechanisms contributing to T2DM, CKD and CVD is required to improve prevention and treatment of these diseases. Furthermore, insight into the interplay between these pathologies and identification of molecular players interconnecting these comorbidities is of tremendous importance for optimal health management in the future. This Research Topic will focus on the chemokine receptor CXCR4 and its ligands CXCL12/SDF-1a and macrophage migration inhibitory factor (MIF) in the context of CVD and its link with T2DM and CKD, as well as address dipeptidyl peptidase-4 (DPP4) as an important protease destabilizing CXCL12. Chemokines and their receptors are important mediators of cell mobilization, recruitment and arrest, and also more broadly induce cell activation by triggering various intracellular signalling tracks. They control homeostatic conditions, but are also critically involved in inflammatory and pathological processes. Genome-wide association studies revealed single nucleotide polymorphisms connecting CXCL12 as well as MIF with CVD, and a role for both chemokines in T2DM and CKD has also been reported. In this review collection, current knowledge on molecular aspects of the CXCR4 ligand/receptor family and associated signalling pathways will be discussed. The physiological roles of CXCR4, CXCL12, MIF and DPP4 will be summarized, and recent findings on their function in pathological conditions of CVD, T2DM and CKD will be highlighted. This is combined with an extensive introduction providing insight into the pathologies of CVD, T2DM and CKD, discussing clinical features and common pathological aspects of these comorbidities on cellular and molecular level. Also, an overview of available animal models to study these diseases will be provided. This way, this Research Topic summarizes latest knowledge on this crucial molecular axis and its relationship with cardiovascular pathologies for both specialists and interested non-specialists and aims to stimulate further initiatives to unravel the mechanistic involvement of the CXCR4 ligand/receptor family in these morbidities, potentially paving the way for new therapeutical initiatives in the future.

cardiovascular disease --- chemokine --- CXCL12/SDF-1 --- dipeptidyl peptidase --- CXCR4 --- kidney disease --- MIF --- DPP4/CD26 --- diabetes --- chemokine receptor

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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact

chemokines --- cancer therapy --- cancer metastases --- anti-tumor immune response --- cancer inflammation --- immune suppression --- chemokine receptor antagonists

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Among infectious diseases, viral infections are the leading cause of death worldwide, especially in the most low-income countries, particularly in young children. Most of the human viruses are all well characterized in terms of structure, life-cycle, tropism, and associated primary pathologies, but many of the pathogenetic mechanisms underlying their ability to cause acute infection, persist or reactivate in the host and cause chronic and/or degenerative damage, and still need to be fully clarified. At the same time, it seems necessary to develop novel therapeutic approaches and rationale, and possibly more potent antiviral compounds that are addressed to novel targets.

hRSV --- F gene --- G gene --- children --- respiratory diseases --- genotyping --- Saudi Arabia --- α chemokine receptor 4 --- β-chemokine receptor 5 --- human immunodeficiency virus --- monocyte-derived macrophages --- HPV --- sexually transmitted diseases (STDs) --- laboratory methods --- PCR --- genotypes --- surveillance --- epidemiology --- exopolysaccharides --- lactic acid bacteria --- human adenovirus type 5 --- antiviral activity --- cell cycle --- prevalence --- hepatitis B virus --- genotype --- bahrain --- sRAGE --- oxidative stress --- inflammation --- warts

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Mercury is a global pollutant that affects the health of both humans and ecosystems. This Special Issue collects three review papers and six research articles that report on the latest findings on the mechanisms of mercury toxicology and its impacts on environmental health. This collection of papers provides useful, new information on the mechanisms of mercury toxicity and methods of improving the risk assessment of mercury exposure.

toxicity --- Cd --- n/a --- chemokine --- sympathodominant state --- child development --- mRNA --- exposure assessment --- methylmercury --- Pb --- prenatal exposure --- heart rate variability --- review --- cortical precursors --- CCL4 --- Fish --- delayed toxicity --- dose-response relationship --- Hg --- severity --- low-dose exposure --- long term exposure --- methylmercury neurotoxicity --- brain --- correlation of signs and symptoms --- developmental neurotoxicity --- symptoms --- molecular mechanisms --- neurological findings --- delayed effects --- kinetics --- fetus --- oxidative stress --- mercury vapor --- metallothionein-III