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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

Medicine --- Immunology --- lung infection and pathology --- mucosal inflammation --- epithelial barrier function --- mucosal immune response --- therapeutic interventions

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According to a report from the U.S. Centers for Disease Control and Prevention (CDC), achieving safe and healthier foods was one of the top ten achievements of public health in the 20th century. However, considerable persisting challenges currently exist in developed nations and developing economies for further assuring the safety and security of the food supplies. According to CDC estimates, as many as 3000 American adults, as an example, and based on a recent epidemiological estimate of the World Health Organization, around 420,000 individuals around the globe, lose their lives annually due to foodborne diseases. This emphasizes the need for innovative and emerging interventions, for further prevention or mitigation of the risk of foodborne microbial pathogens during food processing and manufacturing. The current publication discusses recent advancements and progress in the elimination and decontamination of microbial pathogens during various stages of manufacturing and production. Special emphasis is placed on hurdle validation studies, investigating decontamination of non-typhoidal Salmonella enterica serovars, various serogroups of Shiga toxin-producing Escherichia coli, public health-significant serotypes of Listeria monocytogenes, and pathogenic species of Cronobacter.

n/a --- bacteria --- stainless steel --- Escherichia coli --- biofilm formation --- beef --- powdered infant formula --- bile acids --- stx-subtypes --- raw milk --- Shiga toxin-producing Escherichia coli --- Cronobacter sakazakii --- synergism of mild heat and pressure --- raspberry --- blueberry --- biocidal effectiveness --- salmonellosis --- Listeria monocytogenes --- small fruits --- biosensors --- food borne pathogens --- grape --- postharvest diseases --- modified atmosphere packaging --- high hydrostatic pressure --- epithelial barrier --- carvacrol --- dietary bioactive components --- rapid detection --- essential oils --- ozon --- stx-genes --- Cronobacter outbreaks --- habituation --- plant extracts --- Escherichia coli (STEC) --- ozonated water --- disinfectants --- caprylic acid --- foodborne pathogens --- temperature --- natural background microflora --- preventive measures --- carbon dioxide --- nitrogen --- strawberry --- high-pressure pasteurization --- gut microbiota --- food safety --- Shiga toxin-producing Escherichia coli (STEC) --- microfluidic chip --- fungi --- blackberry --- serogroups --- infant care setting --- non-ozonated water --- Food contamination. --- Food --- Microbiology. --- Sanitary microbiology --- Contaminated food --- Foods, Contaminated --- Contamination (Technology) --- Food adulteration and inspection --- Bacteriology --- Contamination

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For a long time, the tight junction (TJ) was known to form and regulate the paracellular barrier between epithelia and endothelial cell sheets. Starting shortly after the discovery of the proteins forming the TJ—mainly the two families of claudins and TAMPs—several other functions have been discovered, a striking one being the surprising finding that some claudins form paracellular channels for small ions and/or water. This Special Issue includes 43 articles covering numerous dedicated topics including pathogens affecting the TJ barrier, TJ regulation via immune cells, the TJ as a therapeutic target, TJ and cell polarity, function and regulation by proteins of the tricellular TJ, TJ as a regulator of cellular processes, organ- and tissue-specific functions, TJ as sensors and reacting to environmental conditions, and last but not least, TJ proteins and cancer.

Medicine --- tissue barrier --- tight junction --- claudins --- tricellulin --- tight junctions --- organ preservation --- intestine --- transplantation --- ischemia --- intestinal mucosa --- lung --- epithelia --- interleukin 13 --- UBE2Z --- ubiquitin --- osmolality --- hydrostatic pressure --- cancer --- sensor --- tricellular tight junctions --- endometrial cancer --- epithelial barrier dysfunction --- Claudin-7 --- permeability --- WNK4 --- epithelial sodium channel (ENaC), collecting duct cells --- claudin-1 --- hydrogen peroxide --- phosphorylation --- claudin --- angulin --- drug development --- angubindin-1 --- Clostridium perfringens enterotoxin --- Clostridium perfringens iota-toxin --- antibody --- Mz-ChA-1 cells --- biliary epithelial cells --- phosphatidylcholine --- mucus --- paracellular transport --- atopic dermatitis --- cytokines --- STAT3 --- ZO-2 --- cholestasis --- gene transcription --- hypertrophy --- tumor suppressor --- NLS --- NES --- CaSR --- RhoA --- barrier function --- paracellular permeability --- antidiuretic hormone --- Claudin-14 --- CLDN14 --- hearing loss --- vestibular function --- cochlear implantation --- Hepatitis C Virus --- viral entry --- epidermal barrier --- reconstructed human epidermis --- claudin targeting --- Campylobacter jejuni --- curcumin --- apoptosis --- co-culture --- mouse colon --- TNF --- NFκB --- lipolysis-stimulated lipoprotein receptor (LSR) --- epithelial barrier --- cell–cell contact --- caspase --- kidney stones --- ion reabsorption --- quercetin --- brain barriers --- blood-brain barrier --- neurovascular unit --- blood-cerebrospinal fluid barrier --- arachnoid barrier --- glia limitans --- adherens junctions --- paracellular sodium transport --- thick ascending limb --- nephropathy --- HELIX syndrome --- hypokalemia --- hypermagnesemia --- anhidrosis --- gland dysfunction --- aging --- blood–brain barrier --- mutations --- kidney --- liver --- skin --- human --- mice --- disease --- in silico --- drug discovery --- membrane proteins --- protein interactions --- molecular dynamics --- antibiotic-associated hemorrhagic colitis --- Klebsiella oxytoca --- tight junction assembly --- monocytes --- celiac disease --- claudin-2 --- epithelium --- inflammation --- fibrosis --- proliferation --- migration --- tricellular tight junction --- paracellular water transport --- tight epithelium --- MDCK C7 cells --- cell growth --- endothelia --- adherens junction --- apical junctional complex --- AMP-activated protein kinase (AMPK) --- paracellular barrier --- protein structure --- protein domain --- occludin --- junctional adhesion molecule --- zonula occludens --- MAGUK proteins --- PDZ domain --- stem cell --- chemoresistance --- retinal pigment epithelium --- retinopathy --- barrier formation --- collecting duct --- claudin-5 --- neuropathic pain --- nerve injury --- dorsal root ganglion --- enteropathogenic E. coli (EPEC) --- tight junctions (TJ) --- polarity --- atypical aPKCζ --- transepithelial electrical resistance (TER) --- sorting nexin 9 (SNX9) --- EspF --- claudin 1 --- tumor --- metastasis --- epithelial to mesenchymal transition --- cerebral cavernous malformation --- endothelial barrier --- Rho --- ROCK --- MEKK3 --- ion transport --- ion channel --- super-resolution microscopy --- structured illumination microscopy --- stimulated emission depletion --- single molecule localization microscopy --- Claudin --- blood-biliary barrier --- chronic liver disease --- hepatocellular carcinoma --- cholangiocellular carcinoma --- NISCH syndrome --- repair --- NHE2 --- ClC-2 --- inflammatory bowel disease --- mucosal immunology --- ZO-1 --- actomyosin --- aquaporin --- drinking rate --- epithelial fluid transport --- enterocyte --- osmoregulation --- paracellular --- proximal tubule --- calcium permeability --- claudin-12 --- paracellular channels and barriers --- cell polarity --- pathogens --- immune cells --- environmental sensors

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For a long time, the tight junction (TJ) was known to form and regulate the paracellular barrier between epithelia and endothelial cell sheets. Starting shortly after the discovery of the proteins forming the TJ—mainly the two families of claudins and TAMPs—several other functions have been discovered, a striking one being the surprising finding that some claudins form paracellular channels for small ions and/or water. This Special Issue includes 43 articles covering numerous dedicated topics including pathogens affecting the TJ barrier, TJ regulation via immune cells, the TJ as a therapeutic target, TJ and cell polarity, function and regulation by proteins of the tricellular TJ, TJ as a regulator of cellular processes, organ- and tissue-specific functions, TJ as sensors and reacting to environmental conditions, and last but not least, TJ proteins and cancer.

Medicine --- tissue barrier --- tight junction --- claudins --- tricellulin --- tight junctions --- organ preservation --- intestine --- transplantation --- ischemia --- intestinal mucosa --- lung --- epithelia --- interleukin 13 --- UBE2Z --- ubiquitin --- osmolality --- hydrostatic pressure --- cancer --- sensor --- tricellular tight junctions --- endometrial cancer --- epithelial barrier dysfunction --- Claudin-7 --- permeability --- WNK4 --- epithelial sodium channel (ENaC), collecting duct cells --- claudin-1 --- hydrogen peroxide --- phosphorylation --- claudin --- angulin --- drug development --- angubindin-1 --- Clostridium perfringens enterotoxin --- Clostridium perfringens iota-toxin --- antibody --- Mz-ChA-1 cells --- biliary epithelial cells --- phosphatidylcholine --- mucus --- paracellular transport --- atopic dermatitis --- cytokines --- STAT3 --- ZO-2 --- cholestasis --- gene transcription --- hypertrophy --- tumor suppressor --- NLS --- NES --- CaSR --- RhoA --- barrier function --- paracellular permeability --- antidiuretic hormone --- Claudin-14 --- CLDN14 --- hearing loss --- vestibular function --- cochlear implantation --- Hepatitis C Virus --- viral entry --- epidermal barrier --- reconstructed human epidermis --- claudin targeting --- Campylobacter jejuni --- curcumin --- apoptosis --- co-culture --- mouse colon --- TNF --- NFκB --- lipolysis-stimulated lipoprotein receptor (LSR) --- epithelial barrier --- cell–cell contact --- caspase --- kidney stones --- ion reabsorption --- quercetin --- brain barriers --- blood-brain barrier --- neurovascular unit --- blood-cerebrospinal fluid barrier --- arachnoid barrier --- glia limitans --- adherens junctions --- paracellular sodium transport --- thick ascending limb --- nephropathy --- HELIX syndrome --- hypokalemia --- hypermagnesemia --- anhidrosis --- gland dysfunction --- aging --- blood–brain barrier --- mutations --- kidney --- liver --- skin --- human --- mice --- disease --- in silico --- drug discovery --- membrane proteins --- protein interactions --- molecular dynamics --- antibiotic-associated hemorrhagic colitis --- Klebsiella oxytoca --- tight junction assembly --- monocytes --- celiac disease --- claudin-2 --- epithelium --- inflammation --- fibrosis --- proliferation --- migration --- tricellular tight junction --- paracellular water transport --- tight epithelium --- MDCK C7 cells --- cell growth --- endothelia --- adherens junction --- apical junctional complex --- AMP-activated protein kinase (AMPK) --- paracellular barrier --- protein structure --- protein domain --- occludin --- junctional adhesion molecule --- zonula occludens --- MAGUK proteins --- PDZ domain --- stem cell --- chemoresistance --- retinal pigment epithelium --- retinopathy --- barrier formation --- collecting duct --- claudin-5 --- neuropathic pain --- nerve injury --- dorsal root ganglion --- enteropathogenic E. coli (EPEC) --- tight junctions (TJ) --- polarity --- atypical aPKCζ --- transepithelial electrical resistance (TER) --- sorting nexin 9 (SNX9) --- EspF --- claudin 1 --- tumor --- metastasis --- epithelial to mesenchymal transition --- cerebral cavernous malformation --- endothelial barrier --- Rho --- ROCK --- MEKK3 --- ion transport --- ion channel --- super-resolution microscopy --- structured illumination microscopy --- stimulated emission depletion --- single molecule localization microscopy --- Claudin --- blood-biliary barrier --- chronic liver disease --- hepatocellular carcinoma --- cholangiocellular carcinoma --- NISCH syndrome --- repair --- NHE2 --- ClC-2 --- inflammatory bowel disease --- mucosal immunology --- ZO-1 --- actomyosin --- aquaporin --- drinking rate --- epithelial fluid transport --- enterocyte --- osmoregulation --- paracellular --- proximal tubule --- calcium permeability --- claudin-12 --- paracellular channels and barriers --- cell polarity --- pathogens --- immune cells --- environmental sensors

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• Reference Manager
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For a long time, the tight junction (TJ) was known to form and regulate the paracellular barrier between epithelia and endothelial cell sheets. Starting shortly after the discovery of the proteins forming the TJ—mainly the two families of claudins and TAMPs—several other functions have been discovered, a striking one being the surprising finding that some claudins form paracellular channels for small ions and/or water. This Special Issue includes 43 articles covering numerous dedicated topics including pathogens affecting the TJ barrier, TJ regulation via immune cells, the TJ as a therapeutic target, TJ and cell polarity, function and regulation by proteins of the tricellular TJ, TJ as a regulator of cellular processes, organ- and tissue-specific functions, TJ as sensors and reacting to environmental conditions, and last but not least, TJ proteins and cancer.

tissue barrier --- tight junction --- claudins --- tricellulin --- tight junctions --- organ preservation --- intestine --- transplantation --- ischemia --- intestinal mucosa --- lung --- epithelia --- interleukin 13 --- UBE2Z --- ubiquitin --- osmolality --- hydrostatic pressure --- cancer --- sensor --- tricellular tight junctions --- endometrial cancer --- epithelial barrier dysfunction --- Claudin-7 --- permeability --- WNK4 --- epithelial sodium channel (ENaC), collecting duct cells --- claudin-1 --- hydrogen peroxide --- phosphorylation --- claudin --- angulin --- drug development --- angubindin-1 --- Clostridium perfringens enterotoxin --- Clostridium perfringens iota-toxin --- antibody --- Mz-ChA-1 cells --- biliary epithelial cells --- phosphatidylcholine --- mucus --- paracellular transport --- atopic dermatitis --- cytokines --- STAT3 --- ZO-2 --- cholestasis --- gene transcription --- hypertrophy --- tumor suppressor --- NLS --- NES --- CaSR --- RhoA --- barrier function --- paracellular permeability --- antidiuretic hormone --- Claudin-14 --- CLDN14 --- hearing loss --- vestibular function --- cochlear implantation --- Hepatitis C Virus --- viral entry --- epidermal barrier --- reconstructed human epidermis --- claudin targeting --- Campylobacter jejuni --- curcumin --- apoptosis --- co-culture --- mouse colon --- TNF --- NFκB --- lipolysis-stimulated lipoprotein receptor (LSR) --- epithelial barrier --- cell–cell contact --- caspase --- kidney stones --- ion reabsorption --- quercetin --- brain barriers --- blood-brain barrier --- neurovascular unit --- blood-cerebrospinal fluid barrier --- arachnoid barrier --- glia limitans --- adherens junctions --- paracellular sodium transport --- thick ascending limb --- nephropathy --- HELIX syndrome --- hypokalemia --- hypermagnesemia --- anhidrosis --- gland dysfunction --- aging --- blood–brain barrier --- mutations --- kidney --- liver --- skin --- human --- mice --- disease --- in silico --- drug discovery --- membrane proteins --- protein interactions --- molecular dynamics --- antibiotic-associated hemorrhagic colitis --- Klebsiella oxytoca --- tight junction assembly --- monocytes --- celiac disease --- claudin-2 --- epithelium --- inflammation --- fibrosis --- proliferation --- migration --- tricellular tight junction --- paracellular water transport --- tight epithelium --- MDCK C7 cells --- cell growth --- endothelia --- adherens junction --- apical junctional complex --- AMP-activated protein kinase (AMPK) --- paracellular barrier --- protein structure --- protein domain --- occludin --- junctional adhesion molecule --- zonula occludens --- MAGUK proteins --- PDZ domain --- stem cell --- chemoresistance --- retinal pigment epithelium --- retinopathy --- barrier formation --- collecting duct --- claudin-5 --- neuropathic pain --- nerve injury --- dorsal root ganglion --- enteropathogenic E. coli (EPEC) --- tight junctions (TJ) --- polarity --- atypical aPKCζ --- transepithelial electrical resistance (TER) --- sorting nexin 9 (SNX9) --- EspF --- claudin 1 --- tumor --- metastasis --- epithelial to mesenchymal transition --- cerebral cavernous malformation --- endothelial barrier --- Rho --- ROCK --- MEKK3 --- ion transport --- ion channel --- super-resolution microscopy --- structured illumination microscopy --- stimulated emission depletion --- single molecule localization microscopy --- Claudin --- blood-biliary barrier --- chronic liver disease --- hepatocellular carcinoma --- cholangiocellular carcinoma --- NISCH syndrome --- repair --- NHE2 --- ClC-2 --- inflammatory bowel disease --- mucosal immunology --- ZO-1 --- actomyosin --- aquaporin --- drinking rate --- epithelial fluid transport --- enterocyte --- osmoregulation --- paracellular --- proximal tubule --- calcium permeability --- claudin-12 --- paracellular channels and barriers --- cell polarity --- pathogens --- immune cells --- environmental sensors