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Enzymatic Characterization of Pectinex XXL,a Pectinase Produced by Aspergillus niger,and Its Application in Fruit Juice Production

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现代食品科技 2024年第7期40卷 81-88页

作者： ZHU Furong LIANG Xiaomei WEI Zhifu LI Li HE Fengyuan CHENG Zhong College of food and Quality engineering Nanning UniversityNanning 530200China Guangxi Bingke food Co.Ltd. Nanning 530100China

Pectinex XXL,a commercially prepared pectinase,was investigated for its potential application in the fruit juice *** acid was used as the substrate for determining the enzymatic properties of Pectinex XXL using the DNS *** to the results,the optimal pH for Pectinex XXL activity was 4.5,and the enzyme was stable in the pH range of 3.0~*** optimal pH and pH stability range are consistent with those of some tropical and subtropical *** optimal temperature for Pectinex XXL activity was 60℃,and the enzyme remained stable after one hour in a water bath set at 40℃.Additionally,the enzymatic activity was not inhibited in the presence of 1 mmol/L of Na^(+),Mg^(2+),Ba^(2+),Co^(2+),Zn^(2+),and Fe^(2+),whereas it was slightly inhibited in the presence of 2 mmol/L of K^(+)and Fe^(2+)and partially inhibited in the presence of 1 and 2 mmol/L of Ca^(2+)and Mn^(2+),demonstrating its good stability in acids and excellent thermal catalytic *** on the above experimental results,depectinization experiments were performed on plantain and cherry tomato juices using different amounts of Pectinex *** one hour reaction with 16 U/mL of the enzyme,the yields of the plantain and cherry tomato juices were substantially increased by 119.03%and 15.97%,respectively,while their light transmittance was remarkably enhanced by 37.65%and 12.35%,***,the enzyme reduced the viscosity of the plantain and cherry tomato juices by 88.29%and 29.50%,*** juice production experiments confirmed that this enzyme can significantly improve the yield and light transmittance of plantain juice,while effectively reducing its *** findings indicate the potential of Pectinex XXL in the industrial production of plantain juice.

关键词： plantain cherry tomato fruit juice Aspergillus niger pectinase

Lactobacillus acidophilus FCQHC4L1 strengthens the intestinal mucus barrier and inhibits endoplasmic reticulum stress

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food Science and Human Wellness 2024年

作者： Yuli Qi Leilei Yu Fengwei Tian Wei Chen Xiaoming Liu Qixiao Zhai State Key Laboratory of food Science and Technology Jiangnan University National engineering Research Center for Functional food Jiangnan University School of food Science and Technology Jiangnan University

Mucin 2 (MUC2) is a critical component of the intestinal mucus barrier. Lactic acid bacteria (LAB) strains can improve mucosal homeostasis. In this study， we determined the expression of Muc2 induced by dead bacteria and cell-free conditioned medium (CM) of 50 LAB strains in the human goblet cell line， LS174T. Dead bacteria or CM of LAB affected the Muc2 expression in a species- and strain-specific manner under homeostasis. Next， LAB strains with different regulatory abilities were selected， gavaged into mice， and exposed to dextran sodium sulfate (DSS) after 1 week. Different LAB strains inhibited intestinal injury to different degrees， with Lactobacillus acidophilus FCQHC4L1 exerting the most potent effect. FCQHC4L1 significantly decreased the secretion of pro-inflammatory factors， promoted the expression and secretion of mucin， and inhibited colitis development. This strain also regulated the gut microbiota and increased the secretion of butyric acid. Moreover， CM of FCQHC4L1 inhibited endoplasmic reticulum (ER) stress and ameliorated the abnormal expression of MUC2 by suppressing the activation of the GRP78/ATF6 and GRP78/IRE1/XBP1 signaling pathways. Our results highlight the potential of FCQHC4L1 as a therapeutic agent for strengthening the mucus barrier and improving the gut health.

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Antioxidant and anti-HepG2 cell activities of a novel bioactive peptide from cowhide collagen in vitro

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未来食品学报(英文) 2024年第3期4卷 248-257页

作者： Zhike Xie Yuhan Zhai Yuqing Zhang Ming He Xuguang Wang Shaoxuan Yu Haifang Xiao Yuanda Song School of Agricultural engineering and food Science Shandong University of TechnologyZibo 255049China State Key Laboratory of food Science and Resources Nanchang 330047China

In the present study,the antioxidant and anti-human liver cancer(HepG2)cells effects of bioactive peptides from cowhide collagen(BPCC)were *** exhibited significant scavenging effect on l,1-diphenyl-2-picrylhydrazyl(DPPH)radicals((60.09±3.51)%),2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)(ABTS)radicals((77.40±3.10)%)and hydroxyl radicals((56.00±2.30)%)as well as strong reducing power(0.320士0.025).Meanwhile,BPCC effectively protected biomacromolecules including proteins,lipids and DNA from oxidative damage induced by Cu^(2+)H_(2)O_(2)and 2,2'-azobis(2-methylpropionamidine)dihydrochloride(AAPH).Moreover,BPCC significantly inhibited cell viability of HepG2 cells in a dose-dependent manner with an estimated IC_(50)of 7.61 mg/*** results of 4',6-diamidino-2-phenylindole(DAPI)and acridine:orange/ethidium bromide(AO/EB)staining demonstrated the apoptotic morphological changes and cell mediated death in BPCC treated HepG2 *** addition,BPCC induced decrease of mitochondrial membrane potential(MMP)in HepG2 ***,the present finding proved that BPCC encompasses significant antioxidant activity and anticancer property on HepG2 cells and can be used as alternative food antioxidants for cancer prevention benefits.

关键词： Cowhide collagen peptide Antioxidant activity Oxidative damage Anticancer activity

Modification of food protein fibrils: During and after fibrillization

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food Science and Human Wellness 2024年

作者： Kefan Ouyang Hexiang Xie Hua Xiong Qiang Zhao Wenjun Wang State Key Laboratory of food Science and Resources Nanchang University Jiangxi Key Laboratory of Natural Products and Functional food College of food Science and engineering Jiangxi Agricultural University

Fibrillization endows food proteins with anisotropic nanostructures， significantly enhancing their functional properties. The resultant food protein fibrils (FPFs) have garnered attention for their diverse applications across the food industry. However， the full potential of FPFs is hindered by inherent challenges， particularly their limited stability. This review critically examines the formation of FPFs in food processing， the new protein sources， and on the modification strategies of FPFs， thereby unlocking new avenues for FPF utilization in food processing. In particular， the strategies during and after fibrillization are highlighted. The first strategy is to modify the structure and function of protein fibrils by influencing fibrillization， such as through pretreatment， incubation conditions， nuclei induction， and ingredient interactions. The second strategy is to modify the mature FPFs by regulating their properties and interactions with other components. The review also discusses the potential applications and challenges of FPFs in food systems， such as food preservation， functional food design， and novel delivery carriers.

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Diet mediates the gut microbiome composition and assembly processes in infant and toddler populations

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food Science and Human Wellness 2024年

作者： Shumin Wang Leilei Yu Fengwei Tian Wei Chen Qixiao Zhai State Key Laboratory of food Science and Resources Jiangnan University School of food Science and Technology Jiangnan University National engineering Research Center for Functional food Jiangnan University

Infancy and toddlerhood are critical phases of life， as the gut microbiota is established here， which influences current and future health. During this period， the microbiota was relatively less stable and highly responsive to environmental factors. Therefore， it is important to understand how dietary factors affect this complex stage of microbial assembly. The effect of feeding practices (breast milk/formula) on microbial colonization in early infancy has been actively studied; however， studies on the effect of diet on the gut microbiota during the complementary feeding period are sparse. The introduction of complementary foods provides abundant new dietary compounds for the gut microbiota， which induces a shift in gut microbiota and metabolism from milk-adapted toward a more mature and diverse adult-like community. Herein， we discuss the impact of dietary nutrients (carbohydrates， proteins， fats， vitamins， and minerals) on microbiome of infants and toddlers. Furthermore， this review summarizes the effects of complementary feeding patterns， specific foods (such as cereals; legumes and nuts; vegetables and fruits; meats; dairy products)， food additives， and malnutrition (undernutrition or overnutrition) on gut microbiota of this populations. These findings might deepen our comprehension of the complex interactions between diets and the development and establishment of the gut microbiota. This may facilitate the tailoring of interventions aimed at promoting beneficial modifications within the gut microbial community. Furthermore， the insights gained could inform the design and implementation of safe and efficacious complementary feeding practices.

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Insight into effects of egg- and soybean-derived phosphatidylcholine on non-alcoholic steatosis in mice and HepG2 cells by lipidomics

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food Science and Human Wellness 2024年

作者： Zhihui Yu Chunyou Liu Yating Gao Haoran Guo Huiling Duan Lixin Zhang Yisheng Chen College of food Science and engineering Shanxi Agricultural University Institute of food Nutrition and Safety Shanxi Agricultural University Department of food Science and Technology Guangxi University of Science and Technology

Dietary phosphatidylcholine (PC) is an ideal source of bioactive lipids showing efficacy to alleviate non-alcoholic fatty liver disease (NAFLD). In this study， the lipidomic profiles of nonalcoholic steatosis in mice and HepG2 cells treated with PC isolated from eggs (EPC) and soybean (SPC) were evaluated. EPC and SPC could significantly ameliorate fatty liver disease by down-regulating triglyceride (TG) and diglyceride (DG) levels. Remarkably， EPC exhibited better performance in regulating the hepatic lipid profile leading to decreased PC and TG， ceramides， phosphatidylethanolamine and phosphatidylserine levels. A total of 117 and 20 lipid biomarkers in liver and HepG2 cells involved in glycerophospholipid metabolism were screened out， respectively. The regulatory mechanism of EPC may be attributed to a decrease in the expression of ACACA and SREBP-1c. EPC， via suppressing lipogenic gene expression， which was superior to that of SPC in alleviating nonalcoholic steatosis. Overall， EPC and SPC attenuated HFD-induced NAFLD by improving the hepatic lipid profile. The more significant effect observed with EPC may be attributed to its modulation of glycerophospholipid metabolism.

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An overview of potential cardioprotective benefits of xanthophylls in atherosclerosis:an evidence-based review

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food Science and Human Wellness 2024年第4期13卷 1739-1755页

作者： Yuting Su Feng Chen Jiehua Chen Mingfu Wang Shenzhen Key Laboratory of Marine Microbiome engineering Institute for Advanced StudyShenzhen UniversityShenzhen 518060China Institution for Innovative Development of food Industry Shenzhen UniversityShenzhen 518060China College of Civil and Transportation engineering Shenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of food Nutrition and Health Shenzhen UniversityShenzhen 518060China

Atherosclerosis,as the most prevalent form of cardiovascular disease,is characterized by oxidized lowdensity lipoprotein(ox-LDL)accumulation in the vascular wall,increased inflammation of the large arteries,dysfunction of the endothelial cells(ECs)and vascular smooth muscle cells(VSMCs),which may eventually lead to the formation of ***,one of the main groups of carotenoids,have been proposed as preventive agents or adjunct therapies to prevent and slow the progression of atherosclerosis due to their cardioprotective ***,the underlying preventive mechanism of action of xanthophylls on the pathogenesis of atherosclerosis remains unclear,and clinical evidence of the effect of xanthophylls on atherosclerosis have not yet been summarized and critically *** this regard,we conducted a comprehensive literature search in four scientific databases(Pub Med,Google Scholar,Science Direct and Web of Science)and carefully analyzed the existing evidence to provide meaningful insights on the association between xanthophylls and atherosclerosis from various *** on the evidence from in vitro and in vivo studies,we explored several potential mechanisms,including antioxidant effect,anti-inflammatory effect,regulation of lipid metabolism,and modulation of ECs and VSMCs dysfunction,and we found that a clear picture of regulatory pathways of xanthophylls on atherosclerosis prevention and treatment is still *** addition,epidemiological studies suggested the possible relationship among high dietary intake of xanthophylls,high plasma/serum xanthophylls and a reduced risk of *** evidence from interventional studies investigating the effect of xanthophylls on atherosclerosis is very sparse,whilst indirect clinical evidence was only limited to astaxanthin and ***,well-designed long-term randomized controlled trials(RCTs)are highly recommended for future studies to investigate the effective dose of different

关键词： Atherosclerosis Xanthophylls Antioxidant Anti-inflammation Lipid metabolism

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Elucidation of potential relationship between endogenous proteases and key flavor substances in dry-cured pork coppa

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food Science and Human Wellness 2024年第4期13卷 2152-2160页

作者： Mingming Li Qiujin Zhu Chao Qu Xiaohui Gong Yunhan Zhang Xin Zhang Shouwei Wang China Meat Research Center Beijing 100068China Guizhou Provincial Key Laboratory of Agricultural and Animal Products Storage and Processing School of Liquor&Food EngineeringGuizhou UniversityGuiyang 550025China Beijing Academy of food Sciences Beijing 100068China

Dry-cured meat products are considerably popular around the world due to unique *** is one of the enzymatic reactions from which flavor substances are derived,which is affected by endogenous *** purpose aimed to reveal the potential relationship between endogenous proteases and key flavor substances in dry-cured pork coppa in this *** dynamic changes of endogenous proteases activity,free amino acids,and volatiles during dry-cured pork coppa processing were *** results showed that 5 kinds of free amino acids,Glu,Lys,Val,Ala,and Leu,were identified as significant contributors to ***,key volatiles,such as hexanal,nonanal,octanal,benzaldehyde,3-methyl butanoic acid,2-methyl propanoic acid,and ethyl octanoate,greatly contributed to the flavor characteristics of dry-cured pork *** partial correlation analysis was performed to better elucidate the relationship among *** results revealed that close relationship between endogenous proteases and key *** not only significantly affected the accumulation of key active-amino acids,but also affected the accumulation of ethyl octanoate,2,3-pentanedione,and 2,3-octanedione by regulating the accumulation of octanoic acid and *** addition,cathepsin B and D,DPP II,DPP IV and RAP notably affected accumulation of hexanal.

关键词： Dry-cured pork coppa Endogenous proteases Proteolysis Key taste-active amino acids Volatile compounds

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A novel low molecular weight compound polysaccharides from Chinese herbal medicines: purification， characterization and anti-tumor activities in vitro and in vivo

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food Science and Human Wellness 2024年

作者： Xu Yang Dongli Cao Haiyu Ji Huijing Xu Mengjie Xu Anjun Liu Key Laboratory of food Nutrition and Safety Ministry of Education School of food Science and engineering Tianjin University of Science and Technology National Center of Inspection and Testing for Processed food Quality Tianjin Institute for food Safety Inspection Technology

A novel low molecular weight polysaccharide (LMW-CPS) was identified from a specific combination of Chinese herb ingredients. The monosaccharide composition of LMW-CPS was consisted of single arabinose， which had an α-L-furanose configuration with an average molecular weight of 2.06 kDa. NMR spectra and monosaccharide constitution analyses revealed that it had a backbone of →5)-α-L-Araf-(1→ with α-L-Araf-(1→ as the terminal residue. In vitro experiments found that it could lead to apoptosis and inhibit hepatocellular carcinoma cell proliferation by arresting them in the S phase. In vivo experiments showed that it protected immune organs such as the thymus and spleen， enhanced immune cell activities， stimulated cytokine release， augmented the abundance of CD8， CD3， CD4， and CD19 positive lymphocytes， and markedly impeded solid hepatocellular carcinoma progression in mice. H&E staining and cell cycle examination also indicated that LMW-CPS arrested hepatocellular carcinoma cells at the S phase to induce apoptosis. These findings indicated its promising potential for the treatment of hepatocellular carcinoma.

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