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Lactoferrin

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https://www.readbyqxmd.com/read/28538366/preventing-necrotizing-enterocolitis-by-food-additives-in-neonates-a-network-meta-analysis-revealing-the-efficacy-and-safety
#1
Wentao Yu, Wu Sui, Linsong Mu, Wenying Yi, Haijuan Li, Liqin Wei, Weihong Yin
BACKGROUND: Necrotizing enterocolitis (NEC) is a serious multifactorial gastrointestinal disease which is often discovered in premature infants. Various additives have been used to prevent NEC; yet, their relative efficacy and safety remain disputed. This study aims to compare the efficacy and safety of 5 food additives, namely, probiotics, probiotics + fructo-oligosaccharides, pentoxifylline, arginine, and lactoferrin in preventing NEC in neonates. METHODS: Embase, PubMed, and Cochrane Library had been searched for all eligible randomized control trials...
May 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28534028/mechanisms-affecting-the-gut-of-preterm-infants-in-enteral-feeding-trials
#2
Nicholas D Embleton, Janet E Berrington, Jon Dorling, Andrew K Ewer, Edmund Juszczak, John A Kirby, Christopher A Lamb, Clare V Lanyon, William McGuire, Christopher S Probert, Stephen P Rushton, Mark D Shirley, Christopher J Stewart, Stephen P Cummings
Large randomized controlled trials (RCTs) in preterm infants offer unique opportunities for mechanistic evaluation of the risk factors leading to serious diseases, as well as the actions of interventions designed to prevent them. Necrotizing enterocolitis (NEC) a serious inflammatory gut condition and late-onset sepsis (LOS) are common feeding and nutrition-related problems that may cause death or serious long-term morbidity and are key outcomes in two current UK National Institutes for Health Research (NIHR) trials...
2017: Frontiers in Nutrition
https://www.readbyqxmd.com/read/28533680/preparation-characterization-and-in-vitro-vivo-studies-of-oleanolic-acid-loaded-lactoferrin-nanoparticles
#3
Xiaojing Xia, Haowei Liu, Huixia Lv, Jing Zhang, Jianping Zhou, Zhiying Zhao
Oleanolic acid (OA), a pentacyclic triterpene, is used to safely and economically treat hepatopathy. However, OA, a Biopharmaceutics Classification System IV category drug, has low bioavailability owing to low solubility (<1 μg/mL) and biomembrane permeability. We developed a novel OA nanoparticle (OA-NP)-loaded lactoferrin (Lf) nanodelivery system with enhanced in vitro OA dissolution and improved oral absorption and bioavailability. The OA-NPs were prepared using NP albumin-bound technology and characterized using dynamic light scattering, scanning electron microscopy, X-ray powder diffraction, differential scanning calorimetry, and in vitro dissolution test...
2017: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/28532109/lactoferrin-modified-graphene-oxide-iron-oxide-nanocomposite-for-glioma-targeted-drug-delivery
#4
Meng-Meng Song, Huai-Liang Xu, Jun-Xing Liang, Hui-Hui Xiang, Rui Liu, Yu-Xian Shen
Targeting delivery of drugs in a specific manner represents a potential powerful technology in gliomas. Herein, we prepared a multifunctional targeted delivery system based on graphene oxide (GO) that contains a molecular bio-targeting ligand and superparamagnetic iron oxide nanoparticles on the surface of GO for magnetic targeting. Superparamagnetic Fe3O4 nanoparticles was loaded on the surface of GO via chemical precipitation method to form GO@Fe3O4 nanocomposites. Lactoferrin (Lf), an iron-transporting serum glycoprotein that binds to receptors overexpressed at the surface of glioma cells and vascular endothelial cell of the blood brain barrier, was chosen as the targeted ligand to construct the targeted delivery system Lf@GO@Fe3O4 through EDC/NHS chemistry...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28521818/in-vivo-evaluation-of-microglia-activation-by-intracranial-iron-overload-in-central-pain-after-spinal-cord-injury
#5
Fan Xing Meng, Jing Ming Hou, Tian Sheng Sun
BACKGROUND: Central pain (CP) is a common clinical problem in patients with spinal cord injury (SCI). Recent studies found the pathogenesis of CP was related to the remodeling of the brain. We investigate the roles of iron overload and subsequent microglia activate in the remodeling of the brain after SCI. METHODS: An SCI-induced CP model was established in Sprague-Dawley rats that were randomly assigned to SCI, sham operation, deferoxamine (DFX), minocycline, and nitric oxide synthase inhibitor treatment groups...
May 18, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28521427/immunoexpression-of-lactoferrin-in-triple-negative-breast-cancer-patients-a-proposal-to-select-a-less-aggressive-subgroup
#6
Antonio Ieni, Valeria Barresi, Luana Licata, Roberta Cardia, Carmine Fazzari, Giuseppe Nuciforo, Francesco Caruso, Michele Caruso, Vincenzo Adamo, Giovanni Tuccari
Triple-negative breast cancer (TNBC) indicates a subset of breast carcinomas that does not express estrogen receptor (ER), progesterone receptor (PR) and human epidermal growth factor receptor-2 (HER2). According to the literature, TNBCs are aggressive tumors, characterized by a high incidence of recurrence and a high risk of disease progression. Lactoferrin (LF) is a single-chain, iron-binding glycoprotein of ~700 amino acids, which is involved in a wide range of biological activities, including iron-trafficking and carcinogenesis...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28505540/salivary-protective-factors-in-patients-suffering-from-decompensated-type-2-diabetes
#7
Marcin Chorzewski, Karolina Orywal, Teresa Sierpinska, Maria Golebiewska
PURPOSE: Defining the level of protective factors in saliva of patients suffering from decompensated type 2 diabetes. MATERIAL AND METHODS: 50 Patients with diagnosis of decompensated type 2 diabetes, including 32 women and 18 men at the age of 57.9±9.2 years. The control group consisted of 50 people among whom there were 38 women and 12 men whose average age was estimated at 51.2±9.9 years. RESULTS: It was stated the increased concentration of total protein by 60% and decreased concentration of IgA by 70%, of lysozyme by 27% and of lactoferrin by 40% in resting saliva of patients with type 2 diabetes if compared to the control group...
May 12, 2017: Advances in Medical Sciences
https://www.readbyqxmd.com/read/28505283/oxidative-injury-and-iron-redistribution-are-pathological-hallmarks-of-marmoset-experimental-autoimmune-encephalomyelitis
#8
Jordon Dunham, Jan Bauer, Graham R Campbell, Don J Mahad, Nikki van Driel, Susanne M A van der Pol, Bert A 't Hart, Hans Lassmann, Jon D Laman, Jack van Horssen, Yolanda S Kap
Oxidative damage and iron redistribution are associated with the pathogenesis and progression of multiple sclerosis (MS), but these aspects are not entirely replicated in rodent experimental autoimmune encephalomyelitis (EAE) models. Here, we report that oxidative burst and injury as well as redistribution of iron are hallmarks of the MS-like pathology in the EAE model in the common marmoset. Active lesions in the marmoset EAE brain display increased expression of nicotinamide adenine dinucleotide phosphate (NADPH) oxidase (p22phox, p47phox, and gp91phox) and inducible nitric oxide synthase immunoreactivity within lesions with active inflammation and demyelination, coinciding with enhanced expression of mitochondrial heat-shock protein 70 and superoxide dismutase 1 and 2...
June 1, 2017: Journal of Neuropathology and Experimental Neurology
https://www.readbyqxmd.com/read/28505248/lactobacilli-lactoferrin-interplay-in-chlamydia-trachomatis-infection
#9
Rosa Sessa, Marisa Di Pietro, Simone Filardo, Alessia Bressan, Paola Mastromarino, Alessandra Vittoria Biasucci, Luigi Rosa, Antimo Cutone, Francesca Berlutti, Rosalba Paesano, Piera Valenti
In the cervico-vaginal micro-environment, lactobacilli are known to protect against genital infections and, amongst the host defence compounds, lactoferrin has recently acquired importance for its anti-microbial and anti-inflammatory properties. An abnormal genital micro-environment facilitates the acquisition of pathogens like Chlamydia trachomatis, the leading cause of bacterial sexually transmitted infections worldwide. The aim of our study is to investigate the effects of Lactobacillus crispatus, Lactobacillus brevis and bovine lactoferrin on chlamydial infection, in order to shed light on the complex interplay between host defence mechanisms and C...
May 15, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/28494220/effects-of-recombinant-human-lactoferrin-on-osteoblast-growth-and-bone-status-in-piglets
#10
Qiuling Li, Jie Zhao, Wenping Hu, Jianwu Wang, Tian Yu, Yunping Dai, Ning Li
Lactoferrin (LF), an ~80 kDa iron-binding glycoprotein, modulates many biological effects, including antimicrobial and immunomodulatory activities. Recently, it was shown that LF also regulates bone cell activity, suggesting its therapeutic effect on postmenopausal bone loss. However, a minimal amount is known regarding the effects of recombinant human LF (rhLF) supplementation on bone status in young healthy infants. We found osteoblast cell differentiation was significantly promoted in vitro. Furthermore, treatment of human osteoblast cells with rhLF rapidly induced phosphorylation of p44/p42 mitogen-activated protein kinase (p44/p42 MAPK, ERK1/2)...
May 11, 2017: Animal Biotechnology
https://www.readbyqxmd.com/read/28490576/complement-c5a-functions-as-a-master-switch-for-the-ph-balance-in-neutrophils-exerting-fundamental-immunometabolic-effects
#11
Stephanie Denk, Miriam D Neher, David A C Messerer, Rebecca Wiegner, Bo Nilsson, Daniel Rittirsch, Kristina Nilsson-Ekdahl, Sebastian Weckbach, Anita Ignatius, Miriam Kalbitz, Florian Gebhard, Manfred E Weiss, Josef Vogt, Peter Radermacher, Jörg Köhl, John D Lambris, Markus S Huber-Lang
During sepsis, excessive activation of the complement system with generation of the anaphylatoxin C5a results in profound disturbances in crucial neutrophil functions. Moreover, because neutrophil activity is highly dependent on intracellular pH (pHi), we propose a direct mechanistic link between complement activation and neutrophil pHi In this article, we demonstrate that in vitro exposure of human neutrophils to C5a significantly increased pHi by selective activation of the sodium/hydrogen exchanger. Upstream signaling of C5a-mediated intracellular alkalinization was dependent on C5aR1, intracellular calcium, protein kinase C, and calmodulin, and downstream signaling regulated the release of antibacterial myeloperoxidase and lactoferrin...
May 10, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28490130/formation-of-lactoferrin-sodium-caseinate-complexes-and-their-adsorption-behaviour-at-the-air-water-interface
#12
Quanyang Li, Zhengtao Zhao
This research investigated the complexation behaviour between lactoferrin (Lf) and sodium caseinate (NaCas) before and after heat treatment. The results showed that heating facilitated their interaction and different complexes were formed at different Lf/NaCas ratios. The presence of low concentrations of NaCas resulted in the rapid precipitation of Lf, while no precipitation was observed at the NaCas concentrations higher than Lf/NaCas ratio of 2:1. The formed complexes at the ratio of 2:1 have an average diameter of 194±9...
October 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28489917/mucosal-fluid-glycoprotein-dmbt1-suppresses-twitching-motility-and-virulence-of-the-opportunistic-pathogen-pseudomonas-aeruginosa
#13
Jianfang Li, Matteo M E Metruccio, David J Evans, Suzanne M J Fleiszig
It is generally thought that mucosal fluids protect underlying epithelial surfaces against opportunistic infection via their antimicrobial activity. However, our published data show that human tear fluid can protect against the major opportunistic pathogen Pseudomonas aeruginosa independently of bacteriostatic activity. Here, we explored the mechanisms for tear protection, focusing on impacts of tear fluid on bacterial virulence factor expression. Results showed that tear fluid suppressed twitching motility, a type of surface-associated movement conferred by pili...
May 10, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28487398/transition-metals-at-the-host-pathogen-interface-how-neisseria-exploit-human-metalloproteins-for-acquiring-iron-and-zinc
#14
REVIEW
Wilma Neumann, Rose C Hadley, Elizabeth M Nolan
Transition metals are essential nutrients for all organisms and important players in the host-microbe interaction. During bacterial infection, a tug-of-war between the host and microbe for nutrient metals occurs: the host innate immune system responds to the pathogen by reducing metal availability and the pathogen tries to outmaneuver this response. The outcome of this competition, which involves metal-sequestering host-defense proteins and microbial metal acquisition machinery, is an important determinant for whether infection occurs...
May 9, 2017: Essays in Biochemistry
https://www.readbyqxmd.com/read/28485077/ltf-and-defb1-polymorphisms-are-associated-with-susceptibility-towards-chronic-periodontitis-development
#15
Luisa Zupin, Antonietta Robino, Chiara Ottavia Navarra, Nicola Pirastu, Roberto Di Lenarda, Paolo Gasparini, Sergio Crovella, Lorenzo Bevilacqua
OBJECTIVES: Chronic periodontitis is a common pathological condition that affects the supporting tissue of the teeth, leading to progressive alveolar bone destruction and teeth loss. The disease is caused by bacteria and derives from an altered host immune and inflammatory response, also involving different factors such as the oral hygiene, smoking, genetic background etc. The innate immune response, the first line of host defense, could also play an important role in the susceptibility to chronic periodontitis...
May 9, 2017: Oral Diseases
https://www.readbyqxmd.com/read/28472751/hydroxyapatite-nanorod-and-microsphere-functionalized-with-bioactive-lactoferrin-as-a-new-biomaterial-for-enhancement-bone-regeneration
#16
Pujie Shi, Qun Wang, Cuiping Yu, Fengjiao Fan, Meng Liu, Maolin Tu, Weihong Lu, Ming Du
Lactoferrin (LF) has been recently recognized as a promising new novel bone growth factor for the beneficial effects on bone cells and promotion of bone growth. Currently, it has been attracted wide attention in bone regeneration as functional food additives or a potential bioactive protein in bone tissue engineering. The present study investigated the possibility that hydroxyapatite (HAP) particles, a widely used bone substitute material for high biocompatibility and osteoconductivity, functionalized with lactoferrin as a composite material are applied to bone tissue engineering...
April 23, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28472424/ven-120-a-recombinant-human-lactoferrin-promotes-a-regulatory-t-cell-treg-phenotype-and-drives-resolution-of-inflammation-in-distinct-murine-models-of-inflammatory-bowel-disease
#17
Christopher F MacManus, Colm B Collins, Tom T Nguyen, Randall W Alfano, Paul Jedlicka, Edwin F de Zoeten
Background and Aims: Inflammatory bowel disease (IBD) is characterized by a disruption of immune homeostasis, which is tightly regulated to protect against harmful pathogens yet not react to commensal antigens. Animal studies indicate that regulatory T cells (Treg) modulate the immune response to prevent IBD development. Lactoferrin (LF), is an endogenous anti-inflammatory pleiotropic protein secreted at high concentrations in colostrum and at mucosal sites. However, the effect of LF on specific T lymphocyte populations has not been studied...
May 2, 2017: Journal of Crohn's & Colitis
https://www.readbyqxmd.com/read/28470337/synergistic-activity-of-synthetic-n-terminal-peptide-of-human-lactoferrin-in-combination-with-various-antibiotics-against-carbapenem-resistant-klebsiella-pneumoniae-strains
#18
P Morici, W Florio, C Rizzato, E Ghelardi, A Tavanti, G M Rossolini, A Lupetti
The spread of multi-drug resistant (MDR) Klebsiella pneumoniae strains producing carbapenemases points to a pressing need for new antibacterial agents. To this end, the in-vitro antibacterial activity of a synthetic N-terminal peptide of human lactoferrin, further referred to as hLF1-11, was evaluated against K. pneumoniae strains harboring different carbapenemase genes (i.e. OXA-48, KPC-2, KPC-3, VIM-1), with different susceptibility to colistin and other antibiotics, alone or in combination with conventional antibiotics (gentamicin, tigecycline, rifampicin, clindamycin, and clarithromycin)...
May 3, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28467701/bivalent-aptasensor-based-on-silver-enhanced-fluorescence-polarization-for-rapid-detection-of-lactoferrin-in-milk
#19
Zhu Chen, Hui Li, Wenchao Jia, Xiaohui Liu, Zhoumin Li, Fang Wen, Nan Zheng, Jindou Jiang, Danke Xu
Here we report a novel type of bivalent aptasensor based on silver-enhanced fluorescence polarization (FP) for detection of lactoferrin (Lac) in milk powder with high sensitivity and specificity. The novel two split aptamers were obtained from the aptamer reported in our previous SELEX (systematic evolution of ligands by exponential enrichment) selection, and their minimal structural units were optimized on the basis of their affinity and specificity. Also, dual binding sites of split aptamers were verified...
May 12, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28465447/human-blood-monocytes-are-able-to-form-extracellular-traps
#20
Vanessa Granger, Dorothée Faille, Vanessa Marani, Benoît Noël, Yann Gallais, Natacha Szely, Héloïse Flament, Marc Pallardy, Sylvie Chollet-Martin, Luc de Chaisemartin
Neutrophil extracellular traps (NETs) are extracellular DNA filaments formed during neutrophil activation. This process, called netosis, was originally associated with neutrophil antibacterial properties. However, several lines of evidence now suggest a major role for netosis in thrombosis, autoimmune diseases, and cancer. We demonstrate here that highly purified human blood monocytes are also capable of extracellular trap (ET) release in response to several stimuli. Monocyte ETs display a morphology analogous to NETs and are associated with myeloperoxidase (MPO), lactoferrin (LF), citrullinated histones, and elastase...
May 2, 2017: Journal of Leukocyte Biology
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