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During cell metabolism, oxygen is partially reduced to reactive oxygen species (ROS) that play a physiological role in cellular processes. However, an imbalance between the production of ROS and the ability of defenses to detoxify the organism provokes oxidative stress. Oxidative stress and its subsequent damages to vital cellular components have been associated with numerous severe chronic disorders. In addition, oxidation reactions are responsible for food deterioration during processing and storage. Peptides from animal and vegetal food sources have attracted attention due to the large evidence of their in vitro antioxidant properties. In addition to their potential as safer alternatives to synthetic antioxidants used to prevent oxidative reactions in foods, antioxidant peptides can also act by reducing the risk of numerous oxidative stress-associated diseases. Furthermore, peptides can act synergistically with nonpeptide antioxidants, enhancing their protective effect. This Special Issue of the Foods journal includes outstanding papers illustrating examples of the most recent advances on antioxidant peptides from both vegetal and animal sources. The existing data on their bioactivities demonstrated by in silico, in vitro, and animal models are included as well as the mechanisms of action of identified antioxidant peptides.

Research & information: general --- food peptides --- reactive oxygen species --- antioxidant enzymes --- whey protein hydrolysate --- hydrolysis condition --- food antioxidant --- ORAC --- cellular ROS --- HepG2 --- peptides --- egg white --- egg yolk --- antioxidant peptides --- sarcopenia --- whey protein --- muscle --- C2C12 --- aged animals --- older adult --- exercise --- bioactive peptides --- animal protein --- multifunctionality --- antioxidant activity --- in silico --- cell models --- fruit residues --- antioxidant --- extraction --- albumin --- albumin peptide --- antioxidant peptide --- bioactive peptide --- mung bean --- mung bean albumin --- peptide sequencing --- Vigna radiata --- food peptides --- reactive oxygen species --- antioxidant enzymes --- whey protein hydrolysate --- hydrolysis condition --- food antioxidant --- ORAC --- cellular ROS --- HepG2 --- peptides --- egg white --- egg yolk --- antioxidant peptides --- sarcopenia --- whey protein --- muscle --- C2C12 --- aged animals --- older adult --- exercise --- bioactive peptides --- animal protein --- multifunctionality --- antioxidant activity --- in silico --- cell models --- fruit residues --- antioxidant --- extraction --- albumin --- albumin peptide --- antioxidant peptide --- bioactive peptide --- mung bean --- mung bean albumin --- peptide sequencing --- Vigna radiata

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During cell metabolism, oxygen is partially reduced to reactive oxygen species (ROS) that play a physiological role in cellular processes. However, an imbalance between the production of ROS and the ability of defenses to detoxify the organism provokes oxidative stress. Oxidative stress and its subsequent damages to vital cellular components have been associated with numerous severe chronic disorders. In addition, oxidation reactions are responsible for food deterioration during processing and storage. Peptides from animal and vegetal food sources have attracted attention due to the large evidence of their in vitro antioxidant properties. In addition to their potential as safer alternatives to synthetic antioxidants used to prevent oxidative reactions in foods, antioxidant peptides can also act by reducing the risk of numerous oxidative stress-associated diseases. Furthermore, peptides can act synergistically with nonpeptide antioxidants, enhancing their protective effect. This Special Issue of the Foods journal includes outstanding papers illustrating examples of the most recent advances on antioxidant peptides from both vegetal and animal sources. The existing data on their bioactivities demonstrated by in silico, in vitro, and animal models are included as well as the mechanisms of action of identified antioxidant peptides.

Research & information: general --- food peptides --- reactive oxygen species --- antioxidant enzymes --- whey protein hydrolysate --- hydrolysis condition --- food antioxidant --- ORAC --- cellular ROS --- HepG2 --- peptides --- egg white --- egg yolk --- antioxidant peptides --- sarcopenia --- whey protein --- muscle --- C2C12 --- aged animals --- older adult --- exercise --- bioactive peptides --- animal protein --- multifunctionality --- antioxidant activity --- in silico --- cell models --- fruit residues --- antioxidant --- extraction --- albumin --- albumin peptide --- antioxidant peptide --- bioactive peptide --- mung bean --- mung bean albumin --- peptide sequencing --- Vigna radiata --- n/a

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• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

During cell metabolism, oxygen is partially reduced to reactive oxygen species (ROS) that play a physiological role in cellular processes. However, an imbalance between the production of ROS and the ability of defenses to detoxify the organism provokes oxidative stress. Oxidative stress and its subsequent damages to vital cellular components have been associated with numerous severe chronic disorders. In addition, oxidation reactions are responsible for food deterioration during processing and storage. Peptides from animal and vegetal food sources have attracted attention due to the large evidence of their in vitro antioxidant properties. In addition to their potential as safer alternatives to synthetic antioxidants used to prevent oxidative reactions in foods, antioxidant peptides can also act by reducing the risk of numerous oxidative stress-associated diseases. Furthermore, peptides can act synergistically with nonpeptide antioxidants, enhancing their protective effect. This Special Issue of the Foods journal includes outstanding papers illustrating examples of the most recent advances on antioxidant peptides from both vegetal and animal sources. The existing data on their bioactivities demonstrated by in silico, in vitro, and animal models are included as well as the mechanisms of action of identified antioxidant peptides.

food peptides --- reactive oxygen species --- antioxidant enzymes --- whey protein hydrolysate --- hydrolysis condition --- food antioxidant --- ORAC --- cellular ROS --- HepG2 --- peptides --- egg white --- egg yolk --- antioxidant peptides --- sarcopenia --- whey protein --- muscle --- C2C12 --- aged animals --- older adult --- exercise --- bioactive peptides --- animal protein --- multifunctionality --- antioxidant activity --- in silico --- cell models --- fruit residues --- antioxidant --- extraction --- albumin --- albumin peptide --- antioxidant peptide --- bioactive peptide --- mung bean --- mung bean albumin --- peptide sequencing --- Vigna radiata --- n/a

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Supporting initiation, development and resolution of appropriate immune responses is key to survival. Many nutrients and dietary components have been purported to have a role in supporting optimal immune function. This is vital throughout the life course, from the development and programming of the immune system in early life, to supporting immunity and reducing chronic inflammation in older people. In this special issue of Nutrients, we examine the evidence for the role of diet and dietary components in promoting protective immunity.

immunonutrition --- supplementation --- superoxide dismutase (SOD) --- fermented milk --- selenocysteine --- dendritic cells --- lipoxygenase (LOX) --- chronic inflammatory conditions --- formulation --- immune system --- cytokines --- skeletal muscle --- zinc --- non-digestible carbohydrates --- Toll-like receptor --- carbohydrates --- fiber --- lymphocytes --- antibody --- infants --- liver --- macrophage --- inflammatory process --- probiotic --- plant --- older people --- gut barrier --- infection --- amino acids --- gut --- T helper 1 (Th1) --- immunity --- T cells --- bioactive peptide --- inhibitor of kappa kinase (IKK) --- inflammation --- adhesion molecules --- leukocytes --- human milk oligosaccharides --- vitamin D --- food structure --- vitamin E --- mitogen-activated protein Kinase (MAPK) --- gut microbiota --- weaning --- homeostasis --- intestinal immune system --- extra-cellular signal regulated kinases (ERK) --- cyclooxygenase (COX) --- oxidative stress --- life course --- polyphenols --- oligosaccharides --- micronutrients --- Th17 --- obesity --- tolerance --- arachidonic acid --- growth factors --- anti-inflammation --- age-related immunity --- prebiotic --- biomarker --- microbiome --- functional foods --- immunosenescence --- nutrition --- molecular mechanisms --- metabolism --- macronutrients --- toll-like receptor 4 --- sepsis --- nutrition guidelines --- microbiota --- immunomodulation --- inflammatory markers --- elderly --- Th1/Th17 response --- adults --- reactive oxygen species (ROS) --- anorexia nervosa --- macrophages --- autoimmune diseases --- fatty acids --- T cell --- Treg --- breast milk --- nitric oxide synthase (NOS) --- chemokines --- anti-tumorigenic --- metabolites --- deficiency --- protein hydrolysate --- nuclear factor kappa-light-chain-enhancer of activated B cells (NF-?B) --- cancer

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In recent years, peptides have received increased interest from the pharmaceutical industry. The high potency, specificity, and safety profile are the main strengths of bioactive peptides as new and promising therapies that may fill the gap between small molecules and protein drugs. These positive attributes have renewed interest in the discovery, optimization, and development of peptides as pharmacological therapy. Among bioactive peptides, those released from food sources have acquired importance as nutraceutical and active components in functional foods because they possess regulatory functions that can lead to health benefits. This Special Issue covers a selection of recent research papers and reviews in the field of bioactive peptides. It covers all aspects of peptide research in relation to health promotion. In particular, it emphasizes current knowledge and research trends concerning bioactive peptides, including identification and quantification of peptides from new sources, methods for their production and purification, structure–function relationships, mechanisms of action, in vitro and in vivo assays for the evaluation of their bioactivity, physiological evidence to support health benefits, and peptide stability and bioavailability. Papers regarding the development of new drugs, functional foods, or nutraceuticals based on bioactive peptides were also considered.

antihypertensive peptides --- functional food --- food-derived --- fermentation --- Chlorella sorokiniana --- in silico --- BIOPEP-UWM database --- proteomics --- bioactive peptides --- nano liquid chromatography tandem mass spectrometry (nanoLC–nanoESI MS/MS) --- apolipoprotein E --- amyloid fibrils --- Alzheimer’s disease --- Αβ oligomer --- amyloid --- Aβ peptide --- glioma --- platelets --- antiproliferative assay --- conjugation --- docetaxel --- doxorubicin --- extra domain B --- fibronectin --- Fmoc/tBu --- peptide–drug conjugate --- prostate cancer --- solid-phase synthesis --- targeting --- acrylamide --- enteric nervous system --- galanin --- pig --- stomach --- formyl peptide receptors --- ligands --- diseases --- polymicrobial biofilms --- intragenic antimicrobial peptide --- Hs02 --- Pseudomonas aeruginosa --- Staphylococcus aureus --- osteostatin --- arthritis --- inflammation --- immune response --- cartilage destruction --- bone erosion --- collagen --- hydrolysis --- enzyme --- molecular weight --- sheepskin --- NF-κB --- dry-cured pork ham --- angiotensin I converting enzyme --- endothelial dysfunction --- molecular blind docking --- Lactoferricin B (Lfcin B) --- Histatin-5 --- antimicrobial peptides (AMPs) --- antifungal activity --- proteome microarray --- synergy --- temporin --- MRSA --- antimicrobial peptide --- human keratinocytes --- pseudin-2 --- antisepsis, peptide antibiotics --- neurotensin --- asthma --- T cells --- In situ tetramer staining --- MHC tetramer --- antigen-specific --- confocal microscopy --- fresh tissue --- velvet antler --- alcalase hydrolysate --- antioxidant peptide --- protection ability --- oxidative stress --- Crassostrea angulata --- pidotimod --- CXCR3 --- monocyte --- migration --- PI3K/Akt pathway --- T cell --- immunomodulant --- host defense peptides --- membrane activity --- copper --- piscidins --- Clostridioides difficile --- prolactin-releasing peptide --- GPR10 --- RF-amide peptides --- food intake regulation --- energy expenditure --- neuroprotection --- signaling --- gender differences --- dyslipidemia --- obesity --- hyperglycemia --- pulmonary emphysema --- endothelial progenitor cells --- angiogenic precursor cells --- pegylated glucagon-like peptide 1 --- and endothelial regeneration --- miiuy croaker (Miichthys miiuy) --- swim bladder --- FPYLRH --- antioxidant activity --- cytoprotective effect --- antimicrobial peptides --- antimicrobial resistance --- AMP identification and design --- biosynthesis --- mode of action --- physico-chemical properties --- therapeutic potential --- insects --- Cecropins --- Cec-analogs --- MDR infectious diseases --- airway inflammation --- non-atopic asthma --- hybrid peptide --- pro-inflammatory cytokines --- sPLA2 --- MDA --- database --- proteolysis --- SMILES code --- foods --- nutrition --- chronic diseases --- nutraceuticals --- peptide vaccine --- immune checkpoint inhibitor --- humanized mouse --- cancer antigen --- immune suppression --- vasoactive intestinal peptide --- VPAC1 receptor --- VPAC2 receptor --- rheumatic diseases --- inflammatory bowel disease --- central nervous system diseases --- type 1 diabetes --- Sjögren’s syndrome --- biomarkers --- human antimicrobial peptides --- defensins --- cathelicidins --- anti-inflammatory --- pro-inflammatory --- peptide --- combinatorial library --- library design --- screening --- mutagenesis --- prolyl-hydroxyproline (Pro-Hyp) --- hydroxyprolyl-glycine (Hyp-Gly) --- collagen peptide --- fibroblasts --- fetal bovine serum (FBS) --- AMD --- CNV --- VEGFR1 --- multimeric peptides --- oral delivery --- colorectal cancer --- cancer stem cells --- chemoprevention --- bioactive peptide --- lunasin --- ACE-inhibitory activity --- whey peptides --- molecular docking --- hypertension --- antibiotic resistance --- cystic fibrosis --- cryptides --- anti-biofilm peptides --- synergistic effects --- n/a --- nano liquid chromatography tandem mass spectrometry (nanoLC-nanoESI MS/MS) --- Alzheimer's disease --- peptide-drug conjugate --- Sjögren's syndrome