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Hydrolysed collagen

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https://www.readbyqxmd.com/read/28315441/physico-chemical-characteristics-and-fibril-forming-capacity-of-carp-swim-bladder-collagens-and-exploration-of-their-potential-bioactive-peptides-by-in-silico-approaches
#1
Gaurav Kumar Pal, P V Suresh
This study explores the sustainable valorization of carp swim bladder by-products. The high-value molecule collagens were successfully extracted from carp swim bladder with a yield of∼60% (dry weight basis) and characterized by sodium dodecyl sulfate polyacrylamide gel electrophoresis, UV-spectrum and Fourier transform infrared spectroscopy. The extracted collagens showed the fibril-forming ability and high denaturation temperature (38-39°C). Furthermore, the extracted collagens subjected to preparing bioactive collagen hydrolysates with potential antioxidant activities...
March 14, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28274424/influence-of-hydrolysis-behaviour-and-microfluidisation-on-the-functionality-and-structural-properties-of-collagen-hydrolysates
#2
Yehui Zhang, Yousheng Zhang, Xueming Liu, Lihua Huang, Zhiyi Chen, Jingrong Cheng
The functionality and structural properties of pig skin hydrolysates with different degrees of hydrolysis (DH, 10% and 20%) and microfluidisation (120MPa), prepared by pepsin and Alcalase® have been investigated in this study. Extensive hydrolysis can significantly improve the absolute value of the zeta potential and surface hydrophobicity. The particle distribution of hydrolysates decreased with increasing DH. The numbers of free sulfhydryl (SH) and disulfide bonds (SS) were significantly increased with increasing DH (p<0...
July 15, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28273315/extracellular-collagen-promotes-interleukin-1%C3%AE-induced-urokinase-type-plasminogen-activator-production-by-human-corneal-fibroblasts
#3
Koji Sugioka, Aya Kodama-Takahashi, Koji Yoshida, Keiichi Aomatsu, Kiyotaka Okada, Teruo Nishida, Yoshikazu Shimomura
Purpose: Keratocytes maintain homeostasis of the corneal stroma through synthesis, secretion, and degradation of collagen fibrils of the extracellular matrix. Given that these cells are essentially embedded in a collagen matrix, keratocyte-collagen interactions may play a key role in regulation of the expression or activation of enzymes responsible for matrix degradation including urokinase-type plasminogen activator (uPA), plasmin, and matrix metalloproteinases (MMPs). We examined the effect of extracellular collagen on the production of uPA by corneal fibroblasts (activated keratocytes) stimulated with the proinflammatory cytokine interleukin-1β (IL-1β)...
March 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28266663/the-effect-of-collagen-hydrolysates-from-silver-carp-hypophthalmichthys-molitrix-skin-on-uv-induced-photoaging-in-mice-molecular-weight-affects-skin-repair
#4
Hongdong Song, Mengfei Meng, Xiaofeng Cheng, Bo Li, Chengtao Wang
The use of collagen hydrolysates (CHs) as a nutraceutical agent in skin aging has gained increasing attention. Here, the effects of various doses and molecular weights of CH from silver carp skin on photoaging in mice were investigated. The ingestion of CH at 50, 100 and 200 mg per kg body weight led to a dose-dependent increase in the hydroxyproline, hyaluronic acid and moisture contents of the skin, but it had no significant effect on the mice body weight, or on the spleen or thymus index. Furthermore, ingesting CH with lower (LMCH, 200-1000 Da, 65%) and higher molecular weight (HMCH, >1000 Da, 72%) significantly increased the skin components and improved the antioxidative enzyme activities in both serum and skin (p < 0...
March 7, 2017: Food & Function
https://www.readbyqxmd.com/read/28244315/oral-ingestion-of-collagen-hydrolysate-leads-to-the-transportation-of-highly-concentrated-gly-pro-hyp-and-its-hydrolyzed-form-of-pro-hyp-into-the-bloodstream-and-skin
#5
Misato Yazaki, Yukihiko Ito, Masayoshi Yamada, Spyros Goulas, Sachiyuki Teramoto, Masa-Aki Nakaya, Shigeo Ohno, Kohji Yamaguchi
Collagen hydrolysate is a well-known dietary supplement for the treatment of skin aging; however, its mode of action remains unknown. Previous studies have shown that the oral ingestion of collagen hydrolysate leads to elevated levels of collagen-derived peptides in the blood, but whether these peptides reach the skin remains unclear. Here, we analyzed the plasma concentration of collagen-derived peptides after ingestion of high tripeptide containing collagen hydrolysate in humans. We identified 17 types of collagen-derived peptides transiently, with a particular enrichment in Gly-Pro-Hyp...
March 8, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28242948/optimization-of-process-parameters-for-the-production-of-collagen-peptides-from-fish-skin-epinephelus-malabaricus-using-response-surface-methodology-and-its-characterization
#6
G S Hema, C G Joshy, K Shyni, Niladri S Chatterjee, George Ninan, Suseela Mathew
The study optimized the hydrolysis conditions for the production of fish collagen peptides from skin of Malabar grouper (Epinephelus malabaricus) using response surface methodology. The hydrolysis was done with enzymes pepsin, papain and protease from bovine pancreas. Effects of process parameters viz: pH, temperature, enzyme substrate ratio and hydrolysis time of the three different enzymes on degree of hydrolysis were investigated. The optimum response of degree of hydrolysis was estimated to be 10, 20 and 28% respectively for pepsin, papain and protease...
February 2017: Journal of Food Science and Technology
https://www.readbyqxmd.com/read/28159262/transepithelial-transport-efficiency-of-bovine-collagen-hydrolysates-in-a-human-caco-2-cell-line-model
#7
Mengmeng Feng, Mirko Betti
Collagen was extracted from raw bovine hide and hydrolyzed by one of three enzymes - Alcalase, Flavourzyme, or trypsin - or by using a combination of two or three of these enzymes. The Alcalase-containing enzymatic hydrolysis treatments generated a greater proportion of hydrolysates with molecular weight (MW) <2kDa (79.8-82.7%). Flavourzyme-containing hydrolysis treatments exhibited the greatest proportion of free amino acids (686-740nmol/mg). The hydrolysates were then subjected to a simulated gastrointestinal (GI) digestion, and transport studies were conducted using a Caco-2 cell model...
June 1, 2017: Food Chemistry
https://www.readbyqxmd.com/read/28117676/characterization-of-collagen-peptides-in-elaphuri-davidiani-cornu-aqueous-extract-with-proliferative-activity-on-osteoblasts-using-nano-liquid-chromatography-in-tandem-with-orbitrap-mass-spectrometry
#8
Yanjuan Zhai, Zhenhua Zhu, Yue Zhu, Dawei Qian, Rui Liu, Yunru Peng, Yuhua Ding, Zhen Ouyang, Jin-Ao Duan
First documented in Shennong Bencao Jing (about 200 B.C.-200 A.D.), Elaphuri Davidiani Cornu (EDC) has been recorded for its effects in strengthening bones and balancing other aspects of overall health for approximately 2000 years. In the present study, our aim was to investigate which are the components of the active EDC fraction by a peptidomic strategy. We explored the extent to which EDC increases the proliferation of osteoblasts by measuring the elevations in osteonectin and type I collagen mRNA levels and characterized it using nano-flow liquid chromatography in tandem with orbitrap mass spectrometry...
January 20, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28117674/metabolic-response-of-human-osteoarthritic-cartilage-to-biochemically-characterized-collagen-hydrolysates
#9
Saskia Schadow, Viktor S Simons, Guenter Lochnit, Jens Kordelle, Zuzana Gazova, Hans-Christian Siebert, Juergen Steinmeyer
The most frequent disease of the locomotor system is osteoarthritis (OA), which, as a chronic joint disease, might benefit more from nutrition than acute illnesses. Collagen hydrolysates (CHs) are peptidic mixtures that are often used as nutraceuticals for OA. Three CHs were characterized biochemically and pharmacologically. Our biophysical (MALDI-TOF-MS, NMR, AFM) and fluorescence assays revealed marked differences between CHs of fish (Peptan(®) F 5000, Peptan(®) F 2000) and porcine (Mobiforte(®)) origin with respect to the total number of peptides and common peptides between them...
January 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28004272/rice-bran-protein-hydrolysates-attenuate-diabetic-nephropathy-in-diabetic-animal-model
#10
Kampeebhorn Boonloh, Eun Soo Lee, Hong Min Kim, Mi Hye Kwon, You Mi Kim, Patchareewan Pannangpetch, Bunkerd Kongyingyoes, Upa Kukongviriyapan, Supawan Thawornchinsombut, Eun Young Lee, Veerapol Kukongviriyapan, Choon Hee Chung
INTRODUCTION: Diabetic nephropathy (DN) is an important microvascular complication of uncontrolled diabetes. The features of DN include albuminuria, extracellular matrix alterations, and progressive renal insufficiency. Rice bran protein hydrolysates (RBPs) have been reported to have antihyperglycemic, lipid-lowering, and anti-inflammatory effects in diabetic rats. Our study was to investigate the renoprotective effects of RBP in diabetic animals and mesangial cultured cells. METHODS: Eight-week-old male db/m and db/db mice were orally treated with tap water or RBP (100 or 500 mg/kg/day) for 8 weeks...
December 21, 2016: European Journal of Nutrition
https://www.readbyqxmd.com/read/27932548/total-control-of-chromium-in-tanneries-thermal-decomposition-of-filtration-cake-from-enzymatic-hydrolysis-of-chrome-shavings
#11
P Kocurek, K Kolomazník, M Bařinová, J Hendrych
This paper deals with the problem of chromium recovery from chrome-tanned waste and thus with reducing the environmental impact of the leather industry. Chrome-tanned waste was transformed by alkaline enzymatic hydrolysis promoted by magnesium oxide into practically chromium-free, commercially applicable collagen hydrolysate and filtration cake containing a high portion of chromium. The crude and magnesium-deprived chromium cakes were subjected to a process of thermal decomposition at 650°C under oxygen-free conditions to reduce the amount of this waste and to study the effect of magnesium removal on the resulting products...
December 8, 2016: Waste Management & Research
https://www.readbyqxmd.com/read/27877077/amelioration-of-estrogen-deficiency-induced-obesity-by-collagen-hydrolysate
#12
Tsay-I Chiang, I-Chang Chang, Hsueh-Hui Lee, Kuang Hui Hsieh, Yung-Wei Chiu, Te-Jen Lai, Jer-Yuh Liu, Li-Sung Hsu, Shao-Hsuan Kao
Objectives: Menopausal transition with declining estrogen levels significantly affects the physiological properties of women and consequently contributes to a series of medical conditions, including obesity. Obesity is a crucial risk factor associated with cardiovascular diseases, diabetes mellitus, and breast cancer. Increasing dietary protein content improves satiety and energy expenditure. Thus, we hypothesize that supplementing with collagen, a common dietary protein, may alleviate menopause-induced obesity...
2016: International Journal of Medical Sciences
https://www.readbyqxmd.com/read/27832513/collagen-hydrolysates-of-skin-shavings-prepared-by-enzymatic-hydrolysis-as-a-natural-flocculant-and-their-flocculating-property
#13
Ruijie Fu, Kai Yao, Qisheng Zhang, Dongying Jia, Jiayuan Zhao, Yuanlong Chi
A series of collagen hydrolysates (CHs) were prepared from pigskin shavings by using pepsin (PCH), trypsin (TCH), Alcalase (ACH), HCl (HCH), and NaOH (NCH). Their physicochemical properties, including degree of collagen hydrolysis, molecular weight distribution, electric charge, and microstructure, were investigated, and their flocculation performance was evaluated in a kaolin suspension, at varied pHs and concentrations. PCH exhibited high flocculation capability under acidic and neutral conditions, and its efficiency for removing suspended particles was approximately 80% at a concentration of 0...
November 10, 2016: Applied Biochemistry and Biotechnology
https://www.readbyqxmd.com/read/27768951/protective-effect-of-gelatin-peptides-from-pacific-cod-skin-against-photoaging-by-inhibiting-the-expression-of-mmps-via-mapk-signaling-pathway
#14
Tiejun Chen, Hu Hou, Yan Fan, Shikai Wang, Qianru Chen, Leilei Si, Bafang Li
Chronic exposure to ultraviolet (UV) irradiation causes skin photoaging. This study was undertaken to identify the anti-photoaging mechanisms of gelatin hydrolysate (CH) derived from pacific cod skin. Quantitative real-time reverse transcription-polymerase chain reaction (qRT-PCR) and ELISA assays were used to investigate the effects of CH on matrix metalloproteinases (MMPs) and the signaling pathways after UV irradiation by using a mice skin photoaging model. The average molecular weight of CH was 1200Da, and 273/1000 residues were hydrophobic, Gly-Pro and Gly-Leu sequences and Arg at C-terminus appeared frequently in CH...
December 2016: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/27763502/purification-of-antioxidant-peptides-by-high-resolution-mass-spectrometry-from-simulated-gastrointestinal-digestion-hydrolysates-of-alaska-pollock-theragra-chalcogramma-skin-collagen
#15
Liping Sun, Weidan Chang, Qingyu Ma, Yongliang Zhuang
In this study, the stable collagen hydrolysate was prepared by alcalase hydrolysis and twice simulated gastrointestinal digestion from Alaska pollock skin. The characteristics of hydrolysates and antioxidant activities in vitro, including 2,2'-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) radical (ABTS(•+)) scavenging activity, ferric-reducing antioxidant power (FRAP) and hydroxyl radical (OH·) scavenging activity, were determined. After twice simulated gastrointestinal digestion of skin collagen (SGI-2), the degree of hydrolysis (DH) reached 26...
October 17, 2016: Marine Drugs
https://www.readbyqxmd.com/read/27747904/improvement-of-skin-condition-by-oral-administration-of-collagen-hydrolysates-in-chronologically-aged-mice
#16
Zhenbin Wang, Qing Wang, Lin Wang, Weidong Xu, Yuanqing He, Yunliang Li, Song He, Haile Ma
BACKGROUND: Collagen hydrolysates (CHs) have been demonstrated to have positive effects on skin photoaging by topical application or oral ingestion. However, there has been little research on their influence on skin chronological aging. In this study, 9-month-old female ICR mice were given normal AIN-93M diets containing CHs (2.5, 5 and 10% w/w) from Nile tilapia scale. RESULTS: After 6 months, the collagen content and antioxidant enzyme (superoxide dismutase and glutathione peroxidase) activities increased significantly (P < 0...
October 17, 2016: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/27640091/dipeptidyl-peptidase-ii-from-probiotic-pediococcus-acidilactici-purification-and-functional-characterization
#17
Dimpi Gandhi, Preeti Chanalia, Pooja Attri, Suman Dhanda
Dipeptidylpeptidase-II (DPP-II, E.C. 3.4.14.2), an exopeptidase was purified 15.4 fold with specific activity and yield of 15.4U/mg/mL and 14.68% respectively by a simple two step procedure from a probiotic Pediococcus acidilactici. DPP-II is 38.7KDa homodimeric serine peptidase with involvement of His and subunit mass of 18.9KDa. The enzyme exhibited optimal activity at pH 7.0 and 37°C with activation energy of 24.97kJ/mol. The enzyme retained more than 90% activity upto 50°C thus adding industrial importance...
December 2016: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/27554764/the-preventive-effects-of-two-nutraceuticals-on-experimentally-induced-acute-synovitis
#18
E van de Water, M Oosterlinck, M Dumoulin, N M Korthagen, P R van Weeren, J van den Broek, H Everts, F Pille, D A van Doorn
BACKGROUND: Nutraceuticals are often used in the management of equine osteoarthritis, but scientific evidence of their efficacy is lacking. OBJECTIVES: To study the preventive effects of two new nutraceuticals after the experimental induction of synovitis in comparison with positive and negative control treatments. STUDY DESIGN: Blinded, controlled, randomised experiment. METHODS: Twenty-four healthy Standardbred horses were randomly allocated to supplement AT (multi-ingredient, 28 days), supplement HP (collagen hydrolysate, 60 days), meloxicam (4 days) or placebo (60 days)...
August 24, 2016: Equine Veterinary Journal
https://www.readbyqxmd.com/read/27553280/the-collagen-derived-dipeptide-hydroxyprolyl-glycine-promotes-c2c12-myoblast-differentiation-and-myotube-hypertrophy
#19
Tomoya Kitakaze, Tomotaka Sakamoto, Takehiro Kitano, Naoki Inoue, Fumihito Sugihara, Naoki Harada, Ryoichi Yamaji
The majority of studies on possible roles for collagen hydrolysates in human health have focused on their effects on bone and skin. Hydroxyprolyl-glycine (Hyp-Gly) was recently identified as a novel collagen hydrolysate-derived dipeptide in human blood. However, any possible health benefits of Hyp-Gly remain unclear. Here, we report the effects of Hyp-Gly on differentiation and hypertrophy of murine skeletal muscle C2C12 cells. Hyp-Gly increased the fusion index, the myotube size, and the expression of the myotube-specific myosin heavy chain (MyHC) and tropomyosin structural proteins...
September 23, 2016: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/27540823/oral-administration-of-collagen-hydrolysates-improves-glucose-tolerance-in-normal-mice-through-glp-1-dependent-and-glp-1-independent-mechanisms
#20
Yoshinori Iba, Koji Yokoi, Itsuka Eitoku, Masaki Goto, Seiko Koizumi, Fumihito Sugihara, Hiroshi Oyama, Tadashi Yoshimoto
The aim of this study was to evaluate the antidiabetic properties of collagen hydrolysates (CHs). CHs exhibited dipeptidyl peptidase-IV inhibitory activity and stimulated glucagon-like-peptide-1 (GLP-1) secretion in vitro. We also determined whether CHs improve glucose tolerance in normal mice. Oral administration of CHs suppressed the glycemic response during the oral and intraperitoneal glucose tolerance tests (OGTT and IPGTT), but the effects were weaker in IPGTT than in OGTT. CHs had no effect on the gastric emptying rate...
September 2016: Journal of Medicinal Food
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