JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
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2021
·
IF 5.279
Qing Liu,Tianzhi Xie,Yujia Xi,Ling Li,Fengfeng Mo,Xuebo Liu,Zhigang Liu,Jin-Ming Gao,Tian Yuan
Alzheimer’s disease (AD), a neurodegenerative disease, is the leading cause of dementia. Sesamol is a lignan extracted from sesame oil and has been found to exert neuroprotective effects. The present study aimed to investigate the neuroprotective effects of sesamol on APPswe/PS1dE9 transgenic AD mice. The AD mice were fed with a diet supplemented with sesamol (0.075 w/w %). Sesamol treatment improved spatial memory and learning ability in AD mice, improved neuronal damage, and decreased Aβ accumulation. Sesamol protected the synaptic ultrastructure and inhibited neuroinflammatory responses in the brain of AD mice. Sesamol also significantly inhibited the overactivated microglia and reduced the overexpression of TNF-α and IL-1β in the brain of AD mice. Notably, sesamol reshaped gut microbiota by significantly decreasing the relative abundance of Helicobacter hepaticus, Clostridium, and Bacillaceae, enhancing the relative abundance of Rikenellaceae and Bifidobacterium in AD mice. It has been found that sesamol protected the gut barrier integrity and prevented the LPS leakage into the serum. Importantly, sesamol remarkably enhanced the content of SCFAs, including acetate, propionate, isobutyrate, butyrate, and valerate, in AD mice. Correlation analysis indicated that there was a strong correlation between the levels of SCFAs and cognitive functions. These results demonstrated that sesamol attenuated AD-related cognitive dysfunction and neuroinflammatory responses, which could be partly explained by its role in mediating the gut microbe–SCFA–brain axis. Thus, sesamol is a promising nutritional intervention strategy to prevent AD via the microbiota–gut–brain axis.
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ACS Omega
·
2021
·
IF 3.512
Ruiming Xiao,Wanci Liao,Guangjuan Luo,Zhenning Qin,Shuangyan Han,Ying Lin
Mogroside V (MV), a sweetener, is one of the major components inSiraitia grosvenorii. In our research, after in vitro incubation with MV for 24 h, the human gut microbiota diversity changed, with an enrichment of the genera Bacteroides, Lactobacillus, Prevotella, Megasphaera, and Olsenella and the inhibition of Clostridium XlVa, Dorea, and Desulfovibrio. Moreover, the synthesis of short-chain fatty acids, such as acetate, propionate, and butyrate, was increased by gut microbiota. According to ultraperformance liquid chromatography–mass spectrometry (UPLC-MS) analysis, MV was decomposed into secondary mogrosides, such as mogroside II/I and mogrol, by gut microbiota. Enhanced antioxidant abilities of the metabolites were found in the broth. The results suggested that MV, as a potential prebiotic, could benefit human health through its interaction with gut microbiota.
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NEW JOURNAL OF CHEMISTRY
·
2019
·Vol. 44
·期 1
·162-170
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IF 3.069
Dawei Jiang,Tao Yue,Guichen Wang,Chaochao Wang,Chao Chen,Hongliang Cao,Yun Gao
Due to biological safety and negligible toxicity, nitric oxide (NO) therapy has gained increasing interest in the field of cancer therapy during the past few years. However, individual NO cancer therapy normally exhibited limited therapeutic efficiency. In order to acquire satisfactory therapeutic outcomes, the NO therapy is usually combined with other therapeutic treatments, mostly chemotherapy. Herein, we constructed HA-TPP@NORM nanoparticles based on the co-assembly of an NO donor (NORM) and tetraphenylporphyrin (TPP)-modified hyaluronic acid, which can efficiently generate a highly biocidal molecule of peroxynitrite (ONOO−) via the synergistic interactions of the nitric oxide (NO) therapy and photodynamic therapy (PDT) to enhance the cancer therapeutic efficiency. In addition, MTT results exhibited that without light irradiation, the HA-TPP@NORM nanoparticles have favourable biocompatibility with the cell viability above 95% at the maximum TPP concentration (20 μg mL−1). Under simultaneous irradiation with 365 nm and 650 nm light, ONOO− can be efficiently produced in cancer cells via the direct coupling reaction of the generated NO and superoxide anion radical (O2˙−), which significantly enhanced the anticancer effect, when compared with individual NO therapy or PDT therapy. Therefore, the HA-TPP@NORM nanoparticles may provide a new insight into the design of efficiently NO-related cancer therapeutic systems.
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TRANSITION METAL CHEMISTRY
·
2019
·Vol. 45
·期 2
·111-119
·
IF 1.016
Song Kunpeng,Tang Cheng,Zou Zhijuan,Wu Yundang
The conversion of carbon dioxide into useful chemical raw materials is a necessary development for advancing carbon dioxide capture and storage technology. In this work, a Friedel–Crafts reaction of lignin and metalloporphyrin was used to produce a lignin-based porous organic polymer (P-(L-FeTPP)) with a surface area of up to 1153 m 2 g −1 . P-(L-FeTPP)) efficiently catalyzed the cycloaddition reactions of epoxides and CO 2 under solvent-free conditions, with porphyrin iron acting as an active center. The product yield reached up to 99.6% after 12 h under 1 MPa CO 2 and 70 °C. A turnover number of 1481 was achieved, indicating that this catalyst is much more active than its homogeneous counterpart and is one of the most efficient lignin-supported heterogeneous catalysts ever reported. This method for the in situ incorporation of a metalloporphyrin into a lignin skeleton greatly improved the stability of the metal catalyst, and P-(L-FeTPP) was readily recycled and reused more than six times without any significant loss of catalytic activity. Thus, this catalyst design is promising for practical applications, including the industrial production of cyclic carbonates.
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JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2019
·
IF 3.571
Zhuolin Wang,Qing Xiao,Jinda Zhuang,Tao Feng,Chi-Tang Ho,Shiqing Song
Gas chromatography–olfactometry coupled with sensory analysis and partial least-squares regression (PLSR) analysis led to the identification of the odorants responsible for the different flavors of four yeast extracts. Sensory analysis showed that LA00L had an intense sulfurous attribute, and LA00 was characterized by fatty and green notes, FA31 exhibited the floral odor, while KA02 had strong phenolic, animal, fermented, roasted, and caramellic notes. A total of 37 key aroma compounds with odor activity values greater than 1 were determined. 2,4-Di-tert-butylphenol and methional were the most potent aroma compounds. In addition, the key aroma compounds in LA00L were nonanal, dimethyl disulfide, and γ-decalactone. Octanal, dimethyl disulfide, and benzeneacetaldehyde were the key aroma compounds in LA00. In FA31, styrene, benzeneacetaldehyde, and acetophenone were the key aroma compounds, while indole, 2-methoxyphenol, benzeneacetaldehyde, and p-cresol contributed significantly to the aroma of KA02. PLSR showed that p-cresol and indole were significantly responsible for the phenolic and animal notes inducing the off-flavor (yeasty odor) of yeasty extracts. More significantly, indole was first reported to have an important effect on yeasty odor.
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JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART A
·
2019
·Vol. 108
·期 1
·148-156
·
IF 3.221
Yanli Bao,Liping Yin,Lin Liu,Li Chen
In order to improve the treatment efficacy and reduce the side effects, the synergistic therapy has been effectively exploited in cancer treatment. Herein, we fabricated a kind of acid-sensitive ROS-triggered dextran-based drug delivery system (DHTD/Zn-TPP) for synergistic therapy, in which chemotherapeutics doxorubicin was conjugated to the dextran backbone via ROS cleavable thioketal conjugates while photosensitizer porphyrin (Zn-TPP) was encapsulated via acid-responsive metallic coordinated interaction. The structure and acid-responsive self-assemble behavior of DHTD/Zn-TPP were measured by 1 H NMR, Fourier transform infrared, dynamic laser scattering, and transmission electron microscopy. Further, the in vivo ROS-triggered DOX release and anticancer efficiency were evaluated toward HeLa cells and MCF-7 cells. All the data obtained verified that DHTD/Zn-TPP had a significantly improved cell growth inhibitory effect with light irritation due to the combined application of photodynamic-chemotherapy.
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Solar RRL
·
2019
·Vol. 4
·期 1
·1900365
·
IF 0
Zi-Cheng Kong,Hong-Hong Zhang,Jin-Feng Liao,Yu-Jie Dong,Yong Jiang,Hong-Yan Chen,Dai-Bin Kuang
The excellent photoelectrical properties have rendered lead halide perovskites potential candidates for photocatalytic CO 2 reduction, but they still suffer from the low charge separation efficiency and slow catalytic reaction dynamics. To tackle these drawbacks, herein, a novel CsPbBr 3 -Re(CO) 3 Br(dcbpy) (dcbpy=4,4’-dicarboxy-2,2’-bipyridine) composite photocatalyst is elaborately designed and fabricated by anchoring the complex molecules onto the surface of CsPbBr 3 nanocrystal to work as co-catalyst. Owing to the robust interfacial interaction, effective electron extraction from CsPbBr 3 to complex molecules can be established, which enables the mutual synergetic action to get boosted visible-light-driven catalytic activity and product selectivity. As an encouraging result, a high electron consumption rate of 73.34 μmol g −1 h −1 is yielded for the optimized CsPbBr 3 -Re(600) sample, which is about 23-fold of that of pristine CsPbBr 3 . In addition, a praiseworthy CO selectivity of up to 95% is obtained. The composite catalyst also exhibits good catalytic stability, and a CO yield of 509.14 μmol g −1 is achieved after 15 h of continuous illumination. This result may provide a new strategy to design efficient lead halide perovskite-based heterogeneous photocatalysts.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2020
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IF 2.369
Jinghao He,Dejun Dong,Fan Yang,Lihui Sun,Xing Yu,Zhanping Yang,Xuedong Zhu,Yinchun Liang
In the present study, the solid–liquid phase diagrams of four systems acetic acid + acetic anhydride, propionic acid + acetic anhydride, butyric acid + acetic anhydride, and pentanoic acid + acetic anhydride were determined by differential scanning calorimetry at atmospheric pressure. The experimental results illustrated that these systems showed a eutectic behavior. The experimental data were compared with predicted data acquired by solving the phase equilibrium equations using an algorithm. The liquid-phase activity coefficients were calculated by the Wilson and nonrandom two-liquid activity coefficient models. The results show that the approaches used for the calculated system equilibrium was capable to accurately describe the eutectic solid–liquid phase diagrams of the above-mentioned systems.
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TALANTA
·
2019
·
IF 4.916
Shengrui Xu,Qingqing Liu,Cuicui Wang,Li Xiao,Suling Feng,Ning Li,Chang-Po Chen
In this study, facile fabrication of three-dimensional (3D) pompon-like gold/zinc oxide (Au/ZnO) porous microspheres by hydrothermal procedure was investigated. These microspheres were utilized as solid phase microextraction (SPME) coating for determination of volatile fatty acids (VFAs) from foot odor coupling with gas chromatography-mass spectrometry (GC-MS). SEM and TEM characterizations showed that as-prepared material was composed of 1D porous nanowires and presented a uniform coating on stainless-steel wire. The extraction of VFAs including propanoic acid, butyric acid , isobutanoic acid, isovaleric acid , hexanoic acid , and heptylic acid was carried out by headspace model after sampling from human foot using cotton wool strips. Following optimization of extraction parameters including extraction temperature and time and desorption temperature and time, the as-prepared SPME coating presented better extraction efficiency than commercial DVB/CAR/PDMS fiber towards all the VFAs due to its excellent properties. Under the optimized conditions, the method exhibited good linearity (0.5–200 ng) with regression coefficients (R 2 ) ranging from 0.9836 to 0.9981 for all the analytes. The limits of detection ranged from 0.017 to 0.098 ng. Single fiber repeatability varied from 6.5% to 11.2% and the fiber-to-fiber reproducibility ranged from 8.6% to 12.3%. The proposed method was successfully applied for extraction and determination of VFAs from foot odor after sampling using cotton wool strips.
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CHROMATOGRAPHIA
·
2019
·Vol. 83
·期 2
·305-310
·
IF 1.552
Zhang Chaozheng,Fan Longxing,Zhao Hua
Abstract An increasing number of researchers are focusing on short-chain fatty acids (SCFAs), which are closely related to various aspects of the human body. This study presented a pretreatment method for mouse feces that combined acidification and extraction. Then, a direct injection process into gas chromatography was developed. The limits of detection using this method are 0.5–0.8 mg L −1 , and the corresponding sample contents are 0.015–0.024 mg g −1 . The limits of quantification are 0.8–1.0 mg L −1 , and the corresponding sample contents are 0.024–0.030 mg g −1 . The linear relationship of the calibration curve is good and has a correlation coefficient of > 0.999. The recovery rate of the spiked standard is 80–102%. This method had been successfully applied to analysing and determining SCFAs in biological samples. Graphic Abstract
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Journal of Functional Foods
·
2019
·
IF 3.197
Rui Han,Daorui Pang,Lingrong Wen,Lijun You,Riming Huang,Viktoryia Kulikouskaya
The study explored the changes of a sulfated polysaccharide (SP) from Gracilaria Lemaneiformis during simulated human digestive system. The results showed SP was scarcely degraded without significant difference. Moreover, the results of fermentation in vitro indicated 53.7% of SP were utilized by gut microbiota with the molecular weight decreasing by 59.41% at 48 h. Meanwhile, 50.07 ± 2.82 mM of short chain fatty acids were produced in culture medium. Besides, in contrast with the regulation of galacto-oligosaccharide sacrificing diversity and richness of community, SP could regulate the composition of microbiota in a mild way. What’s more, Proteobacteria and Firmicutes were the most sensitive phyla responding to changes of pH values in this study. And Sutterella, Phascolarctobacterium, Parabacteroides, Lachnospiraceae_UCG-004, Desulfovibrio and Bacteroides were dominant genera for degrading and utilizing SP. Furthermore, the metagenomic function characteristics of microbes might be changed by SP. Thus, SP could be a potential prebiotic.
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ANALYTICA CHIMICA ACTA
·
2019
·
IF 5.256
Hui Ma,Christian Marcus Pedersen,Qi Zhao,Zexiang Lyu,Hui Chang,Yan Qiao,Xianglin Hou,Yingxiong Wang
The Fischer–Tropsch (FT) process is a practical approach to convert synthesis gas (CO and H 2 ) into hydrocarbons and oxygenates, and these product mixtures are usually well-characterized. However, the analysis of Fischer–Tropsch waste water (FTW) is still somewhat underdeveloped and the exact composition of FTW remains unclear. Herein, various qualitative NMR techniques, especially diffusion-ordered spectroscopy (DOSY) and one dimension (1D) selective gradient total correlation spectroscopy (SelTOCSY) were strategically applied in the analysis of FTW. The NMR results show that the DOSY technique can pseudo-separate most of components in complex mixtures over the diffusion dimension. The SelTOCSY technique is used as a supporting method in the cases where the DOSY technique cannot clearly distinguish overlapped signals. Moreover, the quantitative 1 H NMR (qNMR) was further used to quantify the components of the sample. These routine and advanced qualitative and quantitative NMR technique utilized here provide a fast, effective and feasible method for the identification of complex mixtures in FTW, which might be a powerful and fast alternative to gas chromatography or high performance liquid chromatography for FTW research.
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