JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2025
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IF 6.2
Chunhua Zhu,Tao Hong,Mingjing Mou,Yanhong Chen,Zhipeng Li,Mingjing Zheng,Zedong Jiang,Hui Ni,Yanbing Zhu
The immobilized κ-carrageenase MCNF was developed by synergistic integration of κ-carrageenase, calcium phosphate crystals, and magnetic nanoparticles. MCNF outperformed free κ-carrageenase in terms of optimal temperature, thermostability (45–55 °C), stability (pH 6.0 and 12.0), and storage stability. Furthermore, MCNF was extremely reusable and easy to separate from the reaction system. MCNF’s enzymatic breakdown of κ-carrageenan resulted in a tetrasaccharide that competitively inhibited pancreatic lipase (PL). Fluorescence titration experiments showed that κ-carrageenan tetrasaccharide altered the microenvironment of PL by causing static bursting of its intrinsic fluorescence. The circular dichroism experiment demonstrated that adding κ-carrageenan tetrasaccharide reduced α-helix content and increased β-sheet content in PL’s secondary structure. Molecular docking and dynamics simulation research suggested that the κ-carrageenan tetrasaccharide could form a stable complex with PL, entering its hydrophobic cavity and occupying its active site, reducing PL’s catalytic activity. κ-Carrageenan tetrasaccharide could inhibit PL, making it a promising therapeutic agent for obesity prevention and treatment.
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Foods
·
2024
·Vol. 13
·期 16
·2539
·
IF 4.7
Zhonghui Liu,Tieliang Liu,Run Liu,Qi Zhou,Yandaizi Zhou,Yi Zhang,Mingming Zheng
Rapeseed oil is a widely consumed edible oil that contains varieties of beneficial micronutrients such as tocopherols and phytosterols; however, the high acid value due to increased free fatty acid can imperil the oil quality and safety. This paper proposed the enzymatic deacidification for high-acid rapeseed oil and simultaneous production of functional diacylglycerols (DAGs) catalyzed by self-made immobilized lipase CALB@MCM-41-C8. The results indicate that the carrier of molecular sieve MCM-41 exhibited a sufficient surface area of 1439.9 m2/g and a proper pore size of 3.5 nm, promoting the immobilization of lipase CLAB. Under the optimal reaction conditions, the acid value of rapeseed oil was largely decreased from 15.3 mg KOH/g to 1.7 mg KOH/g within 3 h, while DAG content was increased from 1.2% to 40.2%. The antioxidant stability of rapeseed oil was also increased from 4.3 h to 7.6 h after enzymatic deacidification. Besides, the deacidified rapeseed oil exhibited fatty, bitter almond aromas, compared to the picked-vegetable, spicy, and pungent aromas for high-acid oil. Finally, the catalytic stability and applicability of CALB@MCM-41-C8was validated, thus demonstrating the great potential of CALB@MCM-41-C8in green refining of edible oils and sustainable synthesis of functional lipids.
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Food Bioscience
·
2024
·
IF 4.8
Hua-Wei Zhang,Ke Cheng,Jing-Jing Tang,Ling-Zhi Liu,Ruo-Xuan Qin,Yi-Nuo Sun,Jiang-Hua Zhang,Da-Yong Zhou
To synthesize structured phospholipids (SPLs) in an efficient and green manner is of great significance. Herein, novel Fe 3 O 4 @SiO 2 - Aspergillus oryzae lipase (AOL)/copper phosphate trihydrate nanoflowers (FLCNs) were prepared by coprecipitation method and then characterized by energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and vibrating sample magnetometer etc. FLCN activity was further evaluated by promoting functional medium-chain SPL (MCSPL) or short-chain SPL (SCSPL) synthesis via biotransesterification between soybean lecithins and medium-chain fatty acids (MCFAs) or short-chain fatty acids (SCFAs) under optimal reaction conditions. Moreover, FLCNs and free AOLs were comparatively assayed in enzymatic properties. As a result, FLCNs were successfully fabricated with sufficiently large surfaces and numerous enzyme active sites. Owing to these structural features, after reacting at 40 °C for 36 h with FLCN dosage of 6% and substrate mass ratio of 1:3:3, FLCNs exhibited much more excellent activity in MCSPL synthesis with 88.30 ± 0.63% of MCFA incorporation than benchmark enzymes and heterogeneous functional materials. Most significantly, in the first biosynthesis of functional SCSPLs facilitated by FLCNs, much superior SCFA incorporation of 66.55 ± 0.73% was obtained. Notably, FLCNs also possessed convenient magnetic separability together with superior pH and temperature tolerances, thermal and storage stabilities, and recyclability to free AOLs. In brief, the present investigation provides a new biological strategy for effective, economic, convenient, and eco-friendly SPL synthesis in food and pharmaceutical industries, highlighting its merits in functional lipid production.
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Cancer Communications
·
2024
·
IF 20.1
Jian Xiao,Shuqing Cao,Jiawei Wang,Pengyu Li,Quan Cheng,Xinyi Zhou,Jiacheng Dong,Yuan Li,Xinyu Zhao,Zekuan Xu,Li Yang
Background Lymph node metastasis (LNM) is the primary mode of metastasis in gastric cancer (GC). However, the precise mechanisms underlying this process remain elusive. Tumor cells necessitate lipid metabolic reprogramming to facilitate metastasis, yet the role of lipoprotein lipase (LPL), a pivotal enzyme involved in exogenous lipid uptake, remains uncertain in tumor metastasis. Therefore, the aim of this study was to investigate the presence of lipid metabolic reprogramming during LNM of GC as well as the role of LPL in this process. Methods Intracellular lipid levels were quantified using oil red O staining, BODIPY 493/503 staining, and flow cytometry. Lipidomics analysis was employed to identify alterations in intracellular lipid composition following LPL knockdown. Protein expression levels were assessed through immunohistochemistry, Western blotting, and enzyme-linked immunosorbent assays. The mouse popliteal LNM model was utilized to investigate differences in LNM. Immunoprecipitation and mass spectrometry were employed to examine protein associations. In vitro phosphorylation assays and Phos-tag sodium dodecyl-sulfate polyacrylamide gel electrophoresis assays were conducted to detect angiopoietin-like protein 4 (ANGPTL4) phosphorylation. Results We identified that an elevated intracellular lipid level represents a crucial characteristic of node-positive (N+) GC and further demonstrated that a high-fat diet can expedite LNM. LPL was found to be significantly overexpressed in N+ GC tissues and shown to facilitate LNM by mediating dietary lipid uptake within GC cells. Leptin, an obesity-related hormone, intercepted the effect exerted by ANGPTL4/Furin on LPL cleavage. Circulating leptin binding to the leptin receptor could induce the activation of inositol-requiring enzyme-1 (IRE1) kinase, leading to the phosphorylation of ANGPTL4 at the serine 30 residue and subsequently reducing its binding affinity with LPL. Moreover, our research revealed that LPL disrupted lipid homeostasis by elevating intracellular levels of arachidonic acid, which then triggered the cyclooxygenase-2/prostaglandin E2 (PGE2) pathway, thereby promoting tumor lymphangiogenesis. Conclusions Leptin-induced phosphorylation of ANGPTL4 facilitates LPL-mediated lipid uptake and consequently stimulates the production of PGE2, ultimately facilitating LNM in GC.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Run Liu,Yi Zhang,Yuanzhi Xu,Zhonghui Liu,Jinhang Chen,Kheng-Lim Goh,Yufei Zhang,Mingming Zheng
Diacylglycerol (DAG) is a functional lipid that is naturally present in vegetable oils in limited concentrations (1 %–5 %). This study proposed an enzymatic method to afford high-content-DAG vegetable oils via a reaction catalyzed by an immobilized lipase, PS@OMS-C 8 , using high-speed homogenization and molecular distillation. Results indicated that 48.6 % DAG was initially obtained through the enzymatic glycerolysis of rapeseed oil with glycerol, of which 90.2 % was sn -1,3-DAG. PS@OMS-C 8 maintained 35.5 % DAG content after 10 reuse cycles, confirming its catalytic stability; this was attributed to lipase immobilization on the ordered mesoporous silica that significantly improve the secondary protein structures, including α-helix and β-sheet, thereby strengthening the rigidity of PS@OMS-C 8 . In addition to producing DAG-enriched rapeseed oil, other edible oils with 39.4 %–50.2 % DAG content were obtained, as revealed via molecular docking simulation. This study offers new strategies for the sustainable synthesis of vegetable oils with a high content of functional lipids high-content functional lipids.
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TALANTA
·
2024
·
IF 5.6
Guangxuan Chen,Huicong Yuan,Lumei Zhang,Jingran Zhang,Kefeng Li,Xu Wang
The discovery of pancreatic lipase (PL) inhibitors is an essential route to develop new anti-obesity drugs. In this experiment, chitosan was used to add amino groups to cellulose filter paper (CFP) and then glutaraldehyde was used to covalently combine PL with amino-modified CFP through the Schiff base reaction. Under optimal immobilization conditions, CFP immobilized PL has a wide range of pH and temperature tolerance, as well as excellent reproducibility, reusability and storage stability. Subsequently, 26 natural products (NPs) were screened by immobilized PL with black tea extract having the highest inhibition rate. Three compounds with binding effects on PL (epigallocatechin gallate, theaflavin-3-gallate and theaflavin-3,3′-digallate) were captured. Molecular docking proved that these three compounds have a strong binding affinity for PL. Fluorescence spectra further revealed that theaflavin-3,3′-digallate could statically quench the intrinsic fluorescence of pancreatic lipase. The molecular docking and thermodynamic parameters indicated that electrostatic interaction was considered as the main interaction force between PL and theaflavin-3,3′-digallate. Finally, the potential anti-obesity targets and pathways of the three compounds were discussed through network pharmacology. This study not only proposes a simple and efficient method for screening PL inhibitors, but also sheds light on the anti-obesity mechanism of active compounds in black tea.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2017
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IF 3.671
Chenyu Jiang,Chuanchuan Cheng,Mei Hao,Hongbin Wang,Ziying Wang,Cai Shen,Ling-Zhi Cheong
Eggshell membrane (ESM) is an industrial waste that is available in abundance from food industry. Present study investigated the physicochemical properties of oxidized ESM and compared the efficiency of ESM and oxidized ESM as carrier for Burkholderia cepacia lipase (BCL) used in esters hydrolysis and transesterification . Following oxidation treatment, FTIR analysis and Ellman’s assay showed amino acid cysteine in ESM was oxidized to form disulfide bond-containing cystine . In addition, AFM analysis showed ESM which exhibited a highly porous filamentous structure appeared to be coalesce following oxidation treatment. Oxidized ESM also showed reduced porosity (38.67%) in comparison to native ESM (51.65%). BCL were successfully immobilized on oxidized ESM through carrier activation method (enzyme loading of 5.01 mg protein/g oxidized ESM). These immobilized lipase demonstrated significantly (P < 0.05) enhanced catalytic stability with close to 100% of initial hydrolysis (12.03 ± 0.29 mmol/min/g) activity; and more than 85% of its initial transesterification (7.83 ± 0.05) activity for at least 10 consecutive runs. Enhanced catalytic stability of BCL immobilized on oxidized ESM might be due to stabilization of the protein structure in oxidized ESM by disulfide bonds which helped formation of a stable bonding with BCL.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Lili Xu,Qi Qi,Huanruo Liu,Qi Li,Xinyue Geng,Xiangnan Liu,Shu Chen,Xuekun Wang,Hongbo Suo
Modifying the carrier interface is a promising method to improve the microenvironment of immobilized enzymes and enhance their activity and stability. In this work, using proline as amino acid , magnetic metal-organic frameworks (MOFs) were modified with an amino-acid-based ionic liquid (AAIL) with two hydroxyl groups followed by adsorption of porcine pancreatic lipase (PPL). The activity recovery of the prepared immobilized lipase (MMOF-AAIL/PPL) was up to 162 % higher than that of MMOF-PPL (70.8 %). The Michaelis constant of MMOF-AAIL/PPL was 0.0742 mM lower than that of MMOF-PPL, but the catalytic efficiency was 0.0223 min −1 which was higher than MMOF-PPL. Furthermore, MMOF-AAIL/PPL maintained 85.6 % residual activity after stored for 40 days and its residual activity was 71.9 % while that for MMOF-PPL was 58.8 % after incubated in 6 M urea for 2 h. Particularly, after ten consecutive cycles, the residual activity of MMOF-AAIL/PPL still reached 84.4 %. In addition, the magnetic properties of the support facilitate the separation process which improves the utilization efficiency of immobilized enzymes.
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FOOD RESEARCH INTERNATIONAL
·
2025
·
IF 8
Weizhe Wang,Yanmei Xi,Jianfeng Wang,Lunaike Zhao,Jingyi Liu,Xuelu Chi,Baoguo Sun,Nasi Ai
The addition of lipase enhances milk flavor. However, the lipolysis metabolism in milk, particularly at low temperatures, remains poorly understood. This study presents the first comprehensive investigation into the effects of lipase treatment (4 °C, 0–6 h) on the sensory characteristics, volatile compound profiles, and lipid composition of milk. Facial expression analysis and sensory evaluation demonstrated that lipolyzed milk generated happiness due to enhanced fat aroma and creaminess, while increased bitter and astringent notes were associated with mild feelings of sadness and disgust. Analyses based on relative odorant activity value (ROAV), partial least squares-discriminant analysis (PLS-DA), and random forest (RF) models identified hexanoic acid, heptanoic acid, octanoic acid, 2-heptanone, 2-pentadecanone, and delta-dodecalactone as key volatile compounds formed during lipolysis. Lipidomic analysis showed the breakdown of glycerides (TGs and MGs), glycerophospholipids (mainly PEs), and sphingomyelin released free fatty acids (FFAs), serving as precursors for flavor development. During lipolysis, saturated fatty acids in the molecular chains were preferentially hydrolyzed to release FFAs that enhanced aroma, whereas polyunsaturated fatty acids tend to undergo oxidation, forming aldehydes and ketones. This study demonstrates the potential to improve milk flavor through low-temperature lipase treatment and elucidates the associated lipid profile changes during lipolysis.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Yufei Zhang,Jing Jin,Daoxue Zhou,Huihui Liu,Jinmei Lu,Mingming Zheng
Covalent organic frameworks (COFs) are crystalline, porous organic materials that have significant potential as supports for enzyme immobilization. Nevertheless, the in situ preparation of biocatalysts during the COF formation process remains a considerable challenge. Herein, we developed a one-pot in situ preparation strategy. The immobilized lipase PS@TPB-TFPB COF-I was fabricated by mixing the polyvinylpyrrolidone (PVP)-lipase PS complex with precursors 1,3,5-tris(4-aminophenyl)benzene (TPB) and 1,3,5-tris(4-formylphenyl)benzene (TFPB) in acetonitrile catalyzed by acetic acid at room temperature for 48 h. The formation mechanism was systematically investigated using time-dependent microscopy techniques. PVP acts as a guiding reagent, controlling the morphological changes that occur during this process. Furthermore, the biocatalyst was employed in the kinetic resolution of racemic 1-phenylethanol, resulting in a significant enhancement in the conversion rate, with a range of 2.1 to 10.6 times higher compared to free PS at the same reaction time. The robust biocatalyst maintained high catalytic activity and enantioselectivity even after 10 cycles. The strategy described here is promising for lipase immobilization and expands the range of applications for COFs in biomanufacturing.
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FOOD CHEMISTRY
·
2025
·
IF 9.8
Zhouliang Sun,Yufei Zhang,Huanyu Zheng,Yi Zhang,Yang Li,Mingming Zheng
This study aims to construct a food-grade Pickering emulsion stabilized by zein-hydroxypropyl chitosan composite nanoparticles ( Z -HPCS NPs) adsorbed with lipase CRL (Z-HPCS NPs@CRL) to synthesize phytosterol esters. Uniform spherical Z-HPCS NPs with a strong positive charge (39.2 ± 0.4 mV) were fabricated and complexed with negatively charged lipase CRL to stabilize the emulsion interface. Comprehensive characterization revealed that lipase CRL bound to Z -HPCS NPs through synergistic electrostatic interactions and hydrogen bonding. Furthermore, the unique interfacial characteristics of the Pickering emulsion enable efficient migration of by-product (water) from the oil phase to the aqueous phase, driving the equilibrium towards product formation. The Pickering emulsion system stabilized by Z -HPCS NPs@CRL achieved exceptional phytosterol ester yield (90.9 % in 3 h), surpassing both traditional biphasic systems (15.8 %) and free lipase CRL (82.2 %). This work provides fundamental insights into food-grade Pickering emulsion interfacial biocatalysis for the efficient synthesis of phytosterol esters.
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FOOD CHEMISTRY
·
2024
·
IF 8.5
Yonglin Li,Yancai Li,Yan Guo,Jie Qiang,Yongsheng Cao,Guoyi Qu,Yuan Gao,Qi Li,Xiuzhu Yu
Chloropropanol esters are major contaminants in food, but their formation during traditional Chinese cooking remains unclear. In this study, a method based on lipase hydrolysis pretreatment was developed and validated to determine 4 chloropropanol esters. The formation of these esters during stir-frying and hotpot cooking under various conditions was investigated. The results showed that the proposed method outperformed the fast alkali-catalyzed transesterification method. Higher NaCl concentrations led to increased formation of chloropropanol esters. Chloropropanol esters decreased with increasing cooking time due to degradation. Refined oils with a higher ratio of unsaturated fatty acids produced more chloropropanol esters. Adding NaCl at the beginning or end of cooking resulted in fewer chloropropanol esters. Free radicals contribute to the chloropropanol esters, resulting in a strong correlation between chloropropanol esters, the peroxide value, and total polar compounds. This study provides valuable insights into the formation of chloropropanol esters and their mitigation during cooking.
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危险品化学品经营许可证（带存储）