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https://www.readbyqxmd.com/read/28528342/an-insight-into-the-changes-in-skin-texture-and-properties-following-dietary-intervention-with-a-nutricosmeceutical-containing-a-blend-of-collagen-bioactive-peptides-and-antioxidants
#1
Licia Genovese, Andrea Corbo, Sara Sibilla
BACKGROUND: Skin aging is a multifactorial phenomenon which causes alterations in skin physiological functions and, most visibly, phenotypic changes. In particular, during the aging process, hyaluronic acid, collagen, and elastin fibers undergo structural and functional changes. AIMS: This study aimed to give an insight into the photo-protective benefits and efficacy of an oral liquid nutricosmeceutical containing collagen bioactive peptides and antioxidants to counteract the signs of aging...
May 20, 2017: Skin Pharmacology and Physiology
https://www.readbyqxmd.com/read/28528116/ph-controllable-cell-penetrating-polypeptide-possessing-cancer-targeting
#2
DaeYong Lee, IlKoo Noh, Jisang Yoo, N Sanoj Rejinold, Yeu-Chun Kim
Helical peptides were naturally-occurring ordered conformations that mediated various biological functions essential for biotechnology. However, it was difficult for natural helical polypeptides to be applied in biomedical fields due to low bioavailability. To avoid these problems, synthetic alpha-helical polypeptides have recently been introduced by further modifying pendants in the side chain. In spite of an attractive biomimetic helical motif, these systems could not be tailored for targeted delivery mainly due to nonspecific binding events...
May 17, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/28528097/protein-digestomic-analysis-reveals-the-bioactivity-of-deer-antler-velvet-in-simulated-gastrointestinal-digestion
#3
Yang Yu, Yan Jin, Fangjun Wang, Jiaze Yan, Yanxia Qi, Mingliang Ye
Proteins are the most prominent bioactive component in deer antler velvet. The aim of the present study was to track the fate of protein of antler velvet by protein digestomics. The peptide profile identified by LC-MS/MS and the in vitro bioactivity of antler velvet aqueous extract (AAE) were investigated in simulated gastrointestinal digestion. A total of 23, 387 and 417 peptides in AAE, gastric and pancreatic digests were identified using LC-MS/MS, respectively. Collagens, the predominant proteins, released 34 peptides in gastric digests and 146 peptides in pancreatic digests...
June 2017: Food Research International
https://www.readbyqxmd.com/read/28528024/structure-diverse-phylomer-libraries-as-a-rich-source-of-bioactive-hits-from-phenotypic-and-target-directed-screens-against-intracellular-proteins
#4
REVIEW
Paul M Watt, Nadia Milech, Shane R Stone
Phylomers are peptides derived from biodiverse protein fragments. Genetically encoded Phylomer libraries have been constructed, containing hundreds of billions of peptides derived from virtually all of the few thousand fold families found in the protein universe. They offer a rich source of high quality hits against diverse target sequences and have been used for three main purposes: firstly, to identify and validate targets in phenotypic screens; secondly, to block protein interactions with nanomolar potency binding affinities; thirdly as a source of more efficient cell penetrating peptides for the delivery of a wide range of biologics...
May 18, 2017: Current Opinion in Chemical Biology
https://www.readbyqxmd.com/read/28527782/protective-roles-of-bioactive-peptides-during-ischemia-reperfusion-injury-from-bench-to-bedside
#5
REVIEW
Dongdong Wu, Jun Wang, Honggang Wang, Ailing Ji, Yanzhang Li
Ischemia-reperfusion (I/R) is a well-known pathological condition which may lead to disability and mortality. I/R injury remains an unresolved and complicated situation in a number of clinical conditions, such as cardiac arrest with successful reanimation, as well as ischemic events in brain and heart. Peptides have many attractive advantages which make them suitable candidate drugs in treating I/R injury, such as low toxicity and immunogenicity, good solubility property, distinct tissue distribution pattern, and favorable pharmacokinetic profile...
May 17, 2017: Life Sciences
https://www.readbyqxmd.com/read/28527356/exceptional-release-kinetics-and-cytotoxic-selectivity-of-oxidised-mwcnts-double-functionalised-with-doxorubicin-and-prostate-homing-peptide
#6
Vedran Milosavljevic, Ludmila Krejcova, Roman Guran, Hana Buchtelova, Dorota Wawrzak, Lukas Richtera, Zbynek Heger, Pavel Kopel, Vojtech Adam
Multiwall carbon nanotubes (MWCNTs) are among the frequently studied carbon materials, particularly because of their physical and chemical properties and high potential for application in materials chemistry, industry, and medicine. MWCNTs are very promising as transporters of bioactive molecules because of their π electrons and large surface area, which can be easily modified, mostly by the application of inorganic acids for the introduction of carboxylic moieties on the surface. In the present study, we designed an oxidised MWCNTs (oMWCNTs) transporter for the targeted delivery of doxorubicin (Dox)...
May 3, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28524092/marine-fish-proteins-and-peptides-for-cosmeceuticals-a-review
#7
REVIEW
Jayachandran Venkatesan, Sukumaran Anil, Se-Kwon Kim, Min Suk Shim
Marine fish provide a rich source of bioactive compounds such as proteins and peptides. The bioactive proteins and peptides derived from marine fish have gained enormous interest in nutraceutical, pharmaceutical, and cosmeceutical industries due to their broad spectrum of bioactivities, including antioxidant, antimicrobial, and anti-aging activities. Recently, the development of cosmeceuticals using marine fish-derived proteins and peptides obtained from chemical or enzymatical hydrolysis of fish processing by-products has increased rapidly owing to their activities in antioxidation and tissue regeneration...
May 18, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28522994/new-potent-membrane-targeting-antibacterial-peptides-from-viral-capsid-proteins
#8
Susana A Dias, João M Freire, Clara Pérez-Peinado, Marco M Domingues, Diana Gaspar, Nuno Vale, Paula Gomes, David Andreu, Sónia T Henriques, Miguel A R B Castanho, Ana S Veiga
The increasing prevalence of multidrug-resistant bacteria urges the development of new antibacterial agents. With a broad spectrum activity, antimicrobial peptides have been considered potential antibacterial drug leads. Using bioinformatic tools we have previously shown that viral structural proteins are a rich source for new bioactive peptide sequences, namely antimicrobial and cell-penetrating peptides. Here, we test the efficacy and mechanism of action of the most promising peptides among those previously identified against both Gram-positive and Gram-negative bacteria...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28522438/anti-inflammatory-effects-of-oxpapc-involve-endothelial-cell-mediated-generation-of-lxa4
#9
Yunbo Ke, Noureddine Zebda, Olga Oskokova, Taras Afonyushkin, Evgeny Berdyshev, Yufeng Tian, Fanyong Meng, Nicolene Sarich, Valery N Bochkov, Ji Ming Wang, Anna A Birukova, Konstantin G Birukov
Rationale: Oxidation of 1-palmitoyl-2-arachidonoyl-sn-glycero-3-phosphorylcholine generates a group of bioactive oxidized phospholipid products (OxPAPC) with a broad range of biological activities. Barrier-enhancing and anti-inflammatory effects of OxPAPC on pulmonary endothelial cells (EC) are critical for prevention of acute lung injury caused by bacterial pathogens or excessive mechanical ventilation. Anti-inflammatory properties of OxPAPC are associated with its antagonistic effects on toll-like receptors and suppression of RhoA GTPase signaling...
May 18, 2017: Circulation Research
https://www.readbyqxmd.com/read/28521118/automated-cassette-based-production-of-high-specific-activity-203-212-pb-peptide-based-theranostic-radiopharmaceuticals-for-image-guided-radionuclide-therapy-for-cancer
#10
Mengshi Li, Xiuli Zhang, Thomas P Quinn, Dongyoul Lee, Dijie Liu, Falk Kunkel, Brian E Zimmerman, Daniel McAlister, Keith Olewein, Yusuf Menda, Saed Mirzadeh, Roy Copping, Frances L Johnson, Michael K Schultz
A method for preparation of Pb-212 and Pb-203 labeled chelator-modified peptide-based radiopharmaceuticals for cancer imaging and radionuclide therapy has been developed and adapted for automated clinical production. Pre-concentration and isolation of radioactive Pb2+ from interfering metals in dilute hydrochloric acid was optimized using a commercially-available Pb-specific chromatography resin packed in disposable plastic columns. The pre-concentrated radioactive Pb2+ is eluted in NaOAc buffer directly to the reaction vessel containing chelator-modified peptides...
May 10, 2017: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28513435/a-bioactive-peptide-amidating-enzyme-is-required-for-ciliogenesis
#11
Dhivya Kumar, Daniela Strenkert, Ramila S Patel-King, Michael T Leonard, Sabeeha S Merchant, Richard E Mains, Stephen M King, Betty A Eipper
The pathways controlling cilium biogenesis in different cell types have not been fully elucidated. We recently identified peptidylglycine α-amidating monooxygenase (PAM), an enzyme required for generating amidated bioactive signaling peptides, in Chlamydomonas and mammalian cilia. Here, we show that PAM is required for the normal assembly of motile and primary cilia in Chlamydomonas, planaria and mice. Chlamydomonas PAM knockdown lines failed to assemble cilia beyond the transition zone, had abnormal Golgi architecture and altered levels of cilia assembly components...
May 17, 2017: ELife
https://www.readbyqxmd.com/read/28506066/de-novo-computational-design-for-development-of-a-peptide-ligand-oriented-to-vegfr-3-with-high-affinity-and-long-circulation
#12
Hong M Li, Zhi P Dong, Qi Y Wang, Li X Liu, Bing X Li, Xiao N Ma, Ming S Lin, Tao Lu, Yue Wang
The overexpression of VEGFR-3 is correlated with a worse prognosis in lung cancer and has been regarded as a rational target for specific drug delivery. Here, VEGFR-3 homing peptide library was efficiently established by computational design. Strong fluorescent signal of selected peptides were observed in A549 cells, but much weaker in other cells. The positive immunostaining overlapped with VEGFR-3 confirmed high affinity and selectivity of one novel peptide (CP-7). In addition, cell uptake of FITC-CP-7 peptide was significantly blocked by co-injection of excess CP-7 peptide...
May 16, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28504963/novel-pleiotropic-effects-of-bioactive-phospholipids-in-human-lung-cancer-metastasis
#13
Gabriela Schneider, Zachariah Payne Sellers, Kamila Bujko, Sham S Kakar, Magda Kucia, Mariusz Z Ratajczak
We previously proposed that one of the unwanted side effects of chemotherapy and radiotherapy is the increase in several peptide- and non-peptide based chemoattractants in damaged tissues, leading to induction of a prometastatic microenvironment for remaining cancer cells. Herein, we turned out our attention to a potential role of bioactive phospholipids (BphsLs), such as sphingosine-1-phosphate (S1P), ceramide-1-phosphate (C1P), lysophosphatidylcholine (LPC), and lysophosphatidic acid (LPA) in lung cancer (LC) metastasis...
April 27, 2017: Oncotarget
https://www.readbyqxmd.com/read/28502715/identification-of-mature-peptides-from-pban-and-capa-genes-of-the-moths-heliothis-peltigera-and-spodoptera-littoralis
#14
Lapo Ragionieri, Burak Özbagci, Susanne Neupert, Yuval Salts, Michael Davidovitch, Miriam Altstein, Reinhard Predel
By transcriptome analysis, we identified PBAN and CAPA precursors in the moths Spodoptera littoralis and Heliothis peltigera which are among the most damaging pests of agriculture in tropical and subtropical Africa as well as in Mediterranean countries. A combination of mass spectrometry and immunocytochemistry was used to identify mature peptides processed from these precursors and to reveal their spatial distribution in the CNS. We found that the sites of expression of pban genes, the structure of PBAN precursors and the processed neuropeptides are very similar in noctuid moths...
May 11, 2017: Peptides
https://www.readbyqxmd.com/read/28502169/direct-conjugation-of-emerging-contaminants-in-arabidopsis-indication-for-an-overlooked-risk-in-plants
#15
Qiuguo Fu, Jianbo Zhang, Dan Borchardt, Daniel Schlenk, Jay J Gan
Agricultural use of treated wastewater, biosolids and animal wastes introduces a multitude of contaminants of emerging concerns (CECs) into the soil-plant system. The potential for food crops to accumulate CECs depends largely on their metabolism in plants, which at present is poorly understood. Here we evaluated the metabolism of naproxen and ibuprofen, two of the most used human drugs from the profen family, in Arabidopsis thaliana cells and Arabidopsis plant. The complementary use of high-resolution mass spectrometry and 14C labeling allowed characterization of both free and conjugated metabolites, as well as non-extractable residues...
May 14, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28499008/rippminer-a-bioinformatics-resource-for-deciphering-chemical-structures-of-ripps-based-on-prediction-of-cleavage-and-cross-links
#16
Priyesh Agrawal, Shradha Khater, Money Gupta, Neetu Sain, Debasisa Mohanty
Ribosomally synthesized and post-translationally modified peptides (RiPPs) constitute a rapidly growing class of natural products with diverse structures and bioactivities. We have developed RiPPMiner, a novel bioinformatics resource for deciphering chemical structures of RiPPs by genome mining. RiPPMiner derives its predictive power from machine learning based classifiers, trained using a well curated database of more than 500 experimentally characterized RiPPs. RiPPMiner uses Support Vector Machine to distinguish RiPP precursors from other small proteins and classify the precursors into 12 sub-classes of RiPPs...
May 12, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28498962/an-iterative-glycosyltransferase-ents-catalyzes-transfer-and-extension-of-o-and-s-linked-monosaccharide-in-enterocin-96
#17
Rupa Nagar, Alka Rao
Glycosyltransferases are essential tools for in vitro-glycoengineering. Bacteria harbor an unexplored variety of protein glycosyltransferases. Here, we describe a peptide glycosyltransferase (EntS) encoded by ORF0417 of Enterococcus faecalis TX0104. EntS di-glycosylates linear peptide of enterocin 96- a known antibacterial, in vitro. It is capable of transferring as well as extending the glycan onto the peptide in an iterative sequential dissociative manner. It can catalyze multiple linkages: Glc/Gal(-O)Ser/Thr, Glc/Gal(-S)Cys and Glc/Gal(β)Glc/Gal(-O/S)Ser/Thr/Cys, in one pot...
May 12, 2017: Glycobiology
https://www.readbyqxmd.com/read/28498321/bdnf-binds-its-pro-peptide-with-high-affinity-and-the-common-val66met-polymorphism-attenuates-the-interaction
#18
Koichi Uegaki, Haruko Kumanogoh, Toshiyuki Mizui, Takatsugu Hirokawa, Yasuyuki Ishikawa, Masami Kojima
Most growth factors are initially synthesized as precursors then cleaved into bioactive mature domains and pro-domains, but the biological roles of pro-domains are poorly understood. In the present study, we investigated the pro-domain (or pro-peptide) of brain-derived neurotrophic factor (BDNF), which promotes neuronal survival, differentiation and synaptic plasticity. The BDNF pro-peptide is a post-processing product of the precursor BDNF. Using surface plasmon resonance and biochemical experiments, we first demonstrated that the BDNF pro-peptide binds to mature BDNF with high affinity, but not other neurotrophins...
May 12, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28491052/receptor-mediated-melanoma-targeting-with-radiolabeled-%C3%AE-melanocyte-stimulating-hormone-relevance-of-the-net-charge-of-the-ligand
#19
Jean-Philippe Bapst, Alex N Eberle
A majority of melanotic and amelanotic melanomas overexpress melanocortin type 1 receptors (MC1Rs) for α-melanocyte-stimulating hormone. Radiolabeled linear or cyclic analogs of α-MSH have a great potential as diagnostic or therapeutic tools for the management of malignant melanoma. Compounds such as [(111)In]DOTA-NAP-amide exhibit high affinity for the MC1R in vitro, good tumor uptake in vivo, but they may suffer from relatively high kidney uptake and retention in vivo. We have shown previously that the introduction of negative charges into radiolabeled DOTA-NAP-amide peptide analogs may enhance their excretion and reduce kidney retention...
2017: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/28490127/milk-bioactive-peptide-database-a-comprehensive-database-of-milk-protein-derived-bioactive-peptides-and-novel-visualization
#20
Søren Drud Nielsen, Robert L Beverly, Yunyao Qu, David C Dallas
During processing and digestion, milk proteins are disassembled into peptides with an array of biological functions, including antimicrobial, angiotensin-converting enzyme inhibition, antioxidant, opioid, and immunomodulation. These functions are summarized in numerous reviews, yet information on which peptides have which functions remains scattered across hundreds of research articles. We systematically searched the literature for all instances of bioactive peptides derived from milk proteins from any mammalian source...
October 1, 2017: Food Chemistry
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