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Chen J, Tang H, Wang M, Wei H, Ou C. Explorative study for the rapid detection of adulterated surimi using gas chromatography-ion mobility spectrometry. Food Chem 2024; 439:138083. [PMID: 38043278 DOI: 10.1016/j.foodchem.2023.138083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 11/12/2023] [Accepted: 11/24/2023] [Indexed: 12/05/2023]
Abstract
Driven by economic interests, surimi adulteration has become a high-frequency issue. This study aims to assess the feasibility of gas chromatography-ion mobility spectrometry (GC-IMS) in detecting surimi adulteration. In this work, three common adulterated surimi models were established by mixing with different fish species and ratios. The fingerprints enabled a clear discrimination among different tuna surimi, and other two surimi models with different mixing ratios also showed VOCs (volatile organic compounds) differences. Results of unsupervised principal component analysis (PCA) and supervised partial least-squares discrimination analysis (PLS-DA) revealed that different types of adulterated surimi models can be well separated from each other. A total of 12, 16, and 9 VOCs were selected as the potential markers in three simulated models by PLS-DA method, respectively. Therefore, GC-IMS coupled with certain chemometrics is expected to serve as an alternative analytical tool to directly and visually detect adulterated surimi.
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Affiliation(s)
- Jingyi Chen
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, Zhejiang 315832, China
| | - Haiqing Tang
- Faculty of Food Science, Zhejiang Pharmaceutical University, Ningbo, Zhejiang 315100, China
| | - Mengyun Wang
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, Zhejiang 315832, China
| | - Huamao Wei
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, Zhejiang 315832, China
| | - Changrong Ou
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, Zhejiang 315832, China; Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province, Ningbo University, Ningbo, Zhejiang 315832, China.
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2
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Yang J, Huang P, Sun B, Yang W, Ou C, Yuan C, Huang T, Wei H. Comparison of freezing and heating treatment sequence on biochemical properties and flavor of swimming crabs (Portunus Trituberculatus) meat during freeze-thaw cycles. Food Res Int 2024; 175:113758. [PMID: 38128998 DOI: 10.1016/j.foodres.2023.113758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 11/07/2023] [Accepted: 11/22/2023] [Indexed: 12/23/2023]
Abstract
The objective of this study was to compare the effect of freezing and heating treatment sequences on the biochemical properties and flavor of crab (Portunus trituberculatus) meat during freeze-thaw cycles. The results showed that pH, color, K and microstructure changes in the H-F group were not significant with increasing number of freeze-thaw cycles, but TVB-N values increased and WHC values decreased. However, with the increase in the number of freeze-thaw cycles, pH and WHC significantly decreased and TVB-N, L* and K values significantly increased in the C and F-H groups. Proteins were degraded in all groups, but the lower degree of degradation occurred in the H-F group. Although the total free amino acid content decreased with increasing number of freeze-thaw cycles in each group, the high content of AMP and IMP in the H-F group suggested that it still had a better flavor.
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Affiliation(s)
- Jingjing Yang
- College of Food and Pharmaceutical Sciences, Ningbo University, 315211, China
| | - Peiyuan Huang
- College of Food and Pharmaceutical Sciences, Ningbo University, 315211, China
| | - Bolun Sun
- School of Nursing, Wenzhou Medical University, Wenzhou, China
| | - Wenge Yang
- College of Food and Pharmaceutical Sciences, Ningbo University, 315211, China; Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province, Ningbo University, Ningbo 315211, China
| | - Changrong Ou
- College of Food and Pharmaceutical Sciences, Ningbo University, 315211, China; Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province, Ningbo University, Ningbo 315211, China
| | - Chunhong Yuan
- Faculty of Agriculture, Iwate University, Ueda 3-18-8, Morioka, Iwate 020-8550, Japan
| | - Tao Huang
- College of Food and Pharmaceutical Sciences, Ningbo University, 315211, China; Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province, Ningbo University, Ningbo 315211, China.
| | - Huamao Wei
- College of Food and Pharmaceutical Sciences, Ningbo University, 315211, China; Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province, Ningbo University, Ningbo 315211, China.
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Zhang Z, Tang H, Cai K, Liang R, Tong L, Ou C. A Novel Indicator Based on Polyacrylamide Hydrogel and Bromocresol Green for Monitoring the Total Volatile Basic Nitrogen of Fish. Foods 2023; 12:3964. [PMID: 37959082 PMCID: PMC10650302 DOI: 10.3390/foods12213964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 10/21/2023] [Accepted: 10/25/2023] [Indexed: 11/15/2023] Open
Abstract
An intelligent indicator was developed by immobilizing bromocresol green (BCG) within the polyacrylamide (PAAm) hydrogel matrix to monitor the total volatile basic nitrogen (TVB-N) content of fish. The FTIR analysis indicated that BCG was effectively incorporated into the PAAm through the formation of intermolecular hydrogen bonds. A thermogravimetric analysis (TGA) showed that the PAAm/BCG indicator had a mere 0.0074% acrylamide monomer residue, meanwhile, the addition of BCG improved the thermal stability of the indicator. In vapor tests with various concentrations of trimethylamine, the indicator performed similarly at both 4 °C and 25 °C. The total color difference values (ΔE) exhibited a significant linear response to TVB-N levels ranging from 4.29 to 30.80 mg/100 g at 4 °C (R2 = 0.98). Therefore, the PAAm/BCG indicator demonstrated stable and sensitive color changes based on pH variations and could be employed in smart packaging for real-time assessment of fish freshness.
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Affiliation(s)
- Zhepeng Zhang
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315832, China; (Z.Z.); (K.C.); (R.L.); (L.T.)
| | - Haiqing Tang
- Faculty of Food Science, Zhejiang Pharmaceutical University, Ningbo 315100, China;
| | - Keyan Cai
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315832, China; (Z.Z.); (K.C.); (R.L.); (L.T.)
| | - Ruiping Liang
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315832, China; (Z.Z.); (K.C.); (R.L.); (L.T.)
| | - Li Tong
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315832, China; (Z.Z.); (K.C.); (R.L.); (L.T.)
| | - Changrong Ou
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315832, China; (Z.Z.); (K.C.); (R.L.); (L.T.)
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Wu S, Sun W, Yang Y, Jia R, Zhan S, Ou C, Huang T. Phosphorylated Fish Gelatin and the Quality of Jelly Gels: Gelling and Microbiomics Analysis. Foods 2023; 12:3682. [PMID: 37835334 PMCID: PMC10572387 DOI: 10.3390/foods12193682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 09/30/2023] [Accepted: 10/03/2023] [Indexed: 10/15/2023] Open
Abstract
Phosphorylated fish gelatin (PFG) exhibited preferable physical and chemical properties than fish gelatin (FG) in our previous study. To investigate the application values of PFG, the effects of different ratios (2:1, 1:1 and 1:2) of FG(PFG)/κ carrageenan (κC) on the quality of jelly gels (JGs) were investigated. The sensory quality of PFG:κC (1:2)/FG:κC (1:2) was found to be superior based on sensory evaluations, which was also verified with the results for texture, rheology, etc. Moreover, the structural changes in JGs were related to the introduction of phosphoric acid groups into the molecular chain of gelatin and the protein-polysaccharide interactions. According to the storage results, PFG jelly had better storage quality, higher hardness and chewiness values than those of FG jelly. High-throughput sequencing of JG microbial analysis showed that the addition of PFG changed the amount of microorganisms, microbial species abundance and the microbial composition of JGs, which were also closely related to the storage quality of JGs. In conclusion, the applications of PFG have promising potential to improve the quality of confectionery.
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Affiliation(s)
- Shiyu Wu
- College of Food and Pharmaceutical Science, Ningbo University, Ningbo 315211, China; (S.W.); (W.S.); (Y.Y.); (R.J.); (S.Z.); (C.O.)
| | - Wanyi Sun
- College of Food and Pharmaceutical Science, Ningbo University, Ningbo 315211, China; (S.W.); (W.S.); (Y.Y.); (R.J.); (S.Z.); (C.O.)
| | - Yihui Yang
- College of Food and Pharmaceutical Science, Ningbo University, Ningbo 315211, China; (S.W.); (W.S.); (Y.Y.); (R.J.); (S.Z.); (C.O.)
| | - Ru Jia
- College of Food and Pharmaceutical Science, Ningbo University, Ningbo 315211, China; (S.W.); (W.S.); (Y.Y.); (R.J.); (S.Z.); (C.O.)
- Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province, Ningbo University, Ningbo 315832, China
| | - Shengnan Zhan
- College of Food and Pharmaceutical Science, Ningbo University, Ningbo 315211, China; (S.W.); (W.S.); (Y.Y.); (R.J.); (S.Z.); (C.O.)
| | - Changrong Ou
- College of Food and Pharmaceutical Science, Ningbo University, Ningbo 315211, China; (S.W.); (W.S.); (Y.Y.); (R.J.); (S.Z.); (C.O.)
- Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province, Ningbo University, Ningbo 315832, China
| | - Tao Huang
- College of Food and Pharmaceutical Science, Ningbo University, Ningbo 315211, China; (S.W.); (W.S.); (Y.Y.); (R.J.); (S.Z.); (C.O.)
- Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province, Ningbo University, Ningbo 315832, China
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Malik M, Ou C, Curry M, Novack V, Weinstein J, Ahmed M, Sarwar A. Abstract No. 232 Evaluating HCC Patient Experiences to Identify Factors Associated with Underutilization of HCC Treatment in the US: A SEER-CAHPS Analysis. J Vasc Interv Radiol 2023. [DOI: 10.1016/j.jvir.2022.12.293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023] Open
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Yu LC, Hu C, Yang W, Ou C, Jan H, Jan. Prognostic significance of multifocal upper tumors with presence of high inflammation status in upper tract urothelial carcinoma following radical nephrouretectomy. Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)00958-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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Tong L, Tang H, Chen J, Sang S, Liang R, Zhang Z, Ou C. Origin of static magnetic field induced quality improvement in sea bass ( Lateolabrax japonicus) during cold storage: Microbial growth inhibition and protein structure stabilization. Front Nutr 2022; 9:1066964. [PMID: 36466411 PMCID: PMC9709135 DOI: 10.3389/fnut.2022.1066964] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Accepted: 10/31/2022] [Indexed: 09/20/2023] Open
Abstract
To explore the potential application of static magnetic field (SMF) treatment in marine fish preservation, the sea bass (Lateolabrax japonicus) was exposed to SMF (5 mT) and its quality changes during cold storage were evaluated by total viable counts, water holding capacity, pH, color, and textural properties. Characteristics of the protein in the presence of SMF were investigated by measuring total sulfhydryl (SH) content, Ca2+-ATPase activity, secondary structure, and muscle microstructure. SMF treatment exhibited positive effects on fish quality, showing favorable performance on the most quality indicators, especially a significant reduction in the Microbial Counts. Furthermore, higher total SH content and Ca2+-ATPase activity were observed in SMF-treated samples, demonstrating that the oxidation and denaturation of myofibrillar protein (MP) were delayed due to SMF treatment. The transformation of α-helix to random coil was prevented in SMF-treated samples, indicating that the secondary structure of MP was stabilized by SMF treatment. The above changes in protein structures were accompanied by changes in muscle microstructure. More intact and compact structures were observed in SMF-treated samples, characterized by well-defined boundaries between myofibers. Therefore, our findings suggest that under the conditions of this article, SMF treatment could maintain the quality of fish mainly by inhibiting the growth of microorganisms and enhancing the stability of protein structures, and could be a promising auxiliary technology for preservation of aquatic products.
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Affiliation(s)
- Li Tong
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, China
| | - Haiqing Tang
- Faculty of Food Science, Zhejiang Pharmaceutical University, Ningbo, China
| | - Jingyi Chen
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, China
| | - Shangyuan Sang
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, China
- Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
| | - Ruiping Liang
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, China
| | - Zhepeng Zhang
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, China
| | - Changrong Ou
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, China
- Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
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Chen J, Tang H, Zhang M, Sang S, Jia L, Ou C. Exploration of the roles of microbiota on biogenic amines formation during traditional fermentation of Scomber japonicus. Front Microbiol 2022; 13:1030789. [DOI: 10.3389/fmicb.2022.1030789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 10/10/2022] [Indexed: 11/06/2022] Open
Abstract
The influence of microbiota composition and metabolisms on the safety and quality of fermented fish products is attracting increasing attention. In this study, the total viable count (TVC), pH, total volatile base nitrogen (TVB-N) as well as biogenic amines (BAs) of traditional fermented Scomber japonicus (zaoyu) were quantitatively determined. To comprehend microbial community variation and predict their functions during fermentation, 16S rRNA-based high-throughput sequencing (HTS) and phylogenetic investigation of communities by reconstruction of unobserved states (PICRUSt) were employed, respectively. The fresh samples stored without fermentation were used as controls. TVC and TVB-N values increased rapidly, and the content of BAs exceeded the permissible limit on day 2 in the controls, indicating serious spoilage of the fish. In contrast, a slower increase in TVC and TVB-N was observed and the content of BAs was within the acceptable limit throughout the fermentation of zaoyu. Significant differences in microbiota composition were observed between zaoyu and the controls. The bacterial community composition of zaoyu was relatively simple and Lactobacillus was identified as the dominant microbial group. The accumulation of histamine was inhibited in zaoyu, which was positively correlated with the relative abundance of Vibrio, Enterobacter, Macrococcus, Weissella, et al. based on Redundancy analysis (RDA), while Lactobacillus showed a positive correlation with tyramine, cadaverine, and putrescine. Functional predictions, based on Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways analysis, revealed that the relative abundance of metabolic function exhibited a decreasing trend with prolonged fermentation time and the abundance of metabolism-related genes was relatively stable in the later stage of fermentation. Those metabolisms related to the formation of BAs like histidine metabolism and arginine metabolism were inhibited in zaoyu. This study has accompanied microbiota analysis and functional metabolism with the accumulation of BAs to trace their correspondences, clarifying the roles of microorganisms in the inhibition of BAs during fermentation of Scomber japonicus.
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He Y, Sang S, Tang H, Ou C. In vitro
mechanism of antibacterial activity of eucalyptus essential oil against specific spoilage organisms in aquatic products. J FOOD PROCESS PRES 2022. [DOI: 10.1111/jfpp.16349] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Yidan He
- Department of Food Science and Engineering, College of Food and Pharmaceutical Sciences Ningbo University Ningbo China
| | - Shangyuan Sang
- Department of Food Science and Engineering, College of Food and Pharmaceutical Sciences Ningbo University Ningbo China
- Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province Ningbo University Ningbo China
| | - Haiqing Tang
- Department of Food Science Zhejiang Pharmaceutical Colleges Ningbo China
| | - Changrong Ou
- Department of Food Science and Engineering, College of Food and Pharmaceutical Sciences Ningbo University Ningbo China
- Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province Ningbo University Ningbo China
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Ng Y, Nguyen E, Bei B, Hamilton G, Rajaratnam S, Ou C, Mansfield D. P103 Impact of the COVID-19 pandemic on the sleep of patients of a multidisciplinary sleep clinic. SLEEP Advances 2021. [PMCID: PMC8500137 DOI: 10.1093/sleepadvances/zpab014.147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
Introduction
This study aimed to assess the impact of the COVID-19 pandemic on the sleep of adult patients of a multidisciplinary sleep clinic.
Methods
Patients were invited to complete online surveys: Survey 1 in October 2020 (increased COVID-19 restrictions) followed by Survey 2 in February 2021 (after easing of restrictions for a COVIDSafe summer).
Results
Of the 746 patients invited to participate, 73 completed and 8 partially returned Survey 1 (mean age 50.1 years, range 21–83 years, 58% female). Subsequently, 46 completed and 5 partially answered Survey 2. In Survey 1, 22/74 (29.7%) reported reduced sleep quantity and 31/75 (41.3%) indicated worse sleep quality compared with prior to the pandemic. In Survey 2, 33/46 (71.7%) described unchanged sleep quantity whilst 5/46 (10.9%) reported increased sleep quantity since easing COVID-19 restrictions. 36/46 (78.3%) indicated unchanged sleep quality whereas 5/46 (10.9%) described improved sleep quality since easing restrictions. However, 9/46 (19.6%) reported that their sleep remained worse compared with pre-pandemic. For patients who completed both surveys, there was no significant change in Insomnia Severity Index scores (Survey 1 mean 13.6, Survey 2 mean 12.9, mean difference -0.67 [95%CI -2.02, 0.68], p=0.32) or PROMIS Sleep-Related Impairment 8a T-scores (Survey 1 mean 59.0, Survey 2 mean 59.5, mean difference 0.44 [95%CI -1.55, 2.42], p=0.66).
Discussion
The COVID-19 pandemic has negatively affected the sleep of 44% of patients. Following easing of restrictions, symptoms of insomnia and sleep-related impairment did not change significantly, and 19.6% reported that their sleep was not back to their pre-pandemic baseline.
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Affiliation(s)
- Y Ng
- Monash University, Notting Hill, Australia
- Monash Lung, Sleep, Allergy and Immunology, Monash Health, Clayton, Australia
| | - E Nguyen
- Monash University, Notting Hill, Australia
| | - B Bei
- Monash University, Notting Hill, Australia
| | - G Hamilton
- Monash University, Notting Hill, Australia
- Monash Lung, Sleep, Allergy and Immunology, Monash Health, Clayton, Australia
| | | | - C Ou
- Monash University, Notting Hill, Australia
| | - D Mansfield
- Monash University, Notting Hill, Australia
- Monash Lung, Sleep, Allergy and Immunology, Monash Health, Clayton, Australia
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Chen Z, Tang H, Ou C, Xie C, Cao J, Zhang X. A comparative study of volatile flavor components in four types of zaoyu using comprehensive two‐dimensional gas chromatography in combination with time‐of‐flight mass spectrometry. J FOOD PROCESS PRES 2021. [DOI: 10.1111/jfpp.15230] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Zhipeng Chen
- Department of Food Science and Engineering College of Food and Pharmaceutical Sciences Ningbo University Ningbo China
| | - Haiqing Tang
- Department of Food Nutrition and Testing Faculty of Food Science Zhejiang Pharmaceutical College Ningbo China
| | - Changrong Ou
- Department of Food Science and Engineering College of Food and Pharmaceutical Sciences Ningbo University Ningbo China
| | - Cheng Xie
- Department of Food Science and Engineering College of Food and Pharmaceutical Sciences Ningbo University Ningbo China
| | - Jinxuan Cao
- Department of Food Science and Engineering College of Food and Pharmaceutical Sciences Ningbo University Ningbo China
| | - Xin Zhang
- Department of Food Science and Engineering College of Food and Pharmaceutical Sciences Ningbo University Ningbo China
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Lin J, Pan D, Sun Y, Ou C, Wang Y, Cao J. The modification of gelatin films: Based on various cross-linking mechanism of glutaraldehyde at acidic and alkaline conditions. Food Sci Nutr 2019; 7:4140-4146. [PMID: 31890193 PMCID: PMC6924296 DOI: 10.1002/fsn3.1282] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2019] [Revised: 08/11/2019] [Accepted: 09/14/2019] [Indexed: 11/07/2022] Open
Abstract
In order to investigate the effect of glutaraldehyde (GTA) on the structure, mechanical properties and thermal stability of gelatin films, gelatin films modified by GTA at various pH (4.5, 6.5, and 11), were prepared. According to FTIR analysis, the reaction mechanism between GTA and gelatin was different at various pH. With the addition of GTA, the intermolecular forces (hydrogen bonds and ionic bonds) and triple helix structure of gelatin film were significantly disrupted. At pH 4.5, gelatin films modified by GTA showed the highest mechanical properties and thermal stability among all films, which tensile strength and residues in TGA up to 16.13 MPa and 15.05%, respectively. Therefore, an optimum pH was around 4.5 in gelatin films cross-linked by GTA.
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Affiliation(s)
- Junjie Lin
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang ProvinceNingbo UniversityNingboChina
| | - Daodong Pan
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang ProvinceNingbo UniversityNingboChina
| | - Yangying Sun
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang ProvinceNingbo UniversityNingboChina
| | - Changrong Ou
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang ProvinceNingbo UniversityNingboChina
| | - Ying Wang
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang ProvinceNingbo UniversityNingboChina
| | - Jinxuan Cao
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang ProvinceNingbo UniversityNingboChina
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13
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Mao AY, Chen MJ, Yang C, Ou C, Ye XQ, Qin QH, Mo M, Wei CY. [Comparison of modeling effects of two different 7, 12-dimethylbenz[a] anthracene induced breast cancer models in tree shrew]. Zhonghua Zhong Liu Za Zhi 2019; 41:346-350. [PMID: 31137167 DOI: 10.3760/cma.j.issn.0253-3766.2019.05.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the feasibility of 7, 12-dimethylbenz[a] anthracene (DMBA) induced tree shrew breast cancer model, and compare the effects of two administration modes by gavage and mammary gland injection. Methods: A total of 40 tree shrews were randomly divided into two groups (20 animals per group): DMBA gavage group and mammary gland injection group. DMBA was dissolved in edible vegetable oil. For gavage group, tree shrews were administered with DMBA solutions (15 mg/kg) by gavage once a day. For mammary gland injection group, DMBA solution (10 mg/kg) was injected into the mammary fat pad of tree shrews, and the injection was performed for a total of 3 times. From the first administration of DMBA, medroxyprogesterone acetate (MPA, 100 mg/kg) was intramuscularly injected into the muscles of the lateral thighs of tree shrews at the same time, for a total of 5 times. The tumorigenesis and survival of tree shrews were monitored. The tumor histological morphology was observed by HE staining. The expression of estrogen receptor (ER), progesterone receptor (PR), cytokeratin5/6 (CK5/6) and human epidermal factor receptor-2 (HER-2) was detected by immunohistochemical staining. Results: In the gavage group, there were 10 deaths, and 4 tree shrews developed mammary tumors with 20.0% (4/20) tumor formation rate. The success rate of mammary cancer modeling was 10.0% (2/20), and the tumor formation time was 197.3±15.1 days. In the mammary gland injection group, there were 8 tree shrews died, and 9 tree shrews formed tumors with 45.0% (9/20) tumor formation rate. The success rate of mammary cancer modeling was 40.0% (8/20), and the tumor formation time was 71.8±19.0 days. There was no significant difference in mortality and tumor formation rate (P>0.05) between the two groups (all P>0.05). However, in the mammary gland injection group, the success rate of mammary cancer modeling was significantly higher than that in the gavage group (P<0.05), whereas the tumor formation time was markedly shorter than that in the gavage group (P<0.01). The pathological types in the gavage group included ductal hyperplasia, intraductal papilloma and ductal carcinoma in situ, while those in the breast injection group included intraductal papilloma and ductal carcinoma in situ. In both groups, immunohistochemical staining showed the negative expression of HER-2 but positive expression of ER, PR and CK5/6 with varying degrees. Conclusion: Both the DMBA gavage and mammary gland injection can successfully establish the tree shrew breast cancer model, and the modeling effect of mammary gland injection is better than gavage.
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Affiliation(s)
- A Y Mao
- Department of Breast Surgery, Affiliated Tumor Hospital of Guangxi Medical University, Nanning 530021, China
| | - M J Chen
- Department of Breast Surgery, Affiliated Tumor Hospital of Guangxi Medical University, Nanning 530021, China
| | - C Yang
- Department of Experimental Research, Affiliated Tumor Hospital of Guangxi Medical University, Nanning 530021, China
| | - C Ou
- Department of Experimental Research, Affiliated Tumor Hospital of Guangxi Medical University, Nanning 530021, China
| | - X Q Ye
- Department of Pathology, Affiliated Tumor Hospital of Guangxi Medical University, Nanning 530021, China
| | - Q H Qin
- Department of Breast Surgery, Affiliated Tumor Hospital of Guangxi Medical University, Nanning 530021, China
| | - M Mo
- Department of Breast Surgery, Affiliated Tumor Hospital of Guangxi Medical University, Nanning 530021, China
| | - C Y Wei
- Department of Breast Surgery, Affiliated Tumor Hospital of Guangxi Medical University, Nanning 530021, China
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14
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Zhang Y, Xu H, Jiang S, Wang F, Ou C, Zhao Y, Ma L, Li Y. First Report of Colletotrichum truncatum Causing Anthracnose on the Berry Stalk and the Rachis of Kyoho Grape (Vitis labruscana × V. vinifera) Clusters in Hebei, China. Plant Dis 2018; 102:PDIS02180275PDN. [PMID: 30095322 DOI: 10.1094/pdis-02-18-0275-pdn] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Affiliation(s)
- Y Zhang
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Germplasm Resources Utilization, Ministry of Agriculture, and Research Institute of Pomology, Chinese Academy of Agricultural Sciences, Xingcheng 125100, China
| | - H Xu
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Germplasm Resources Utilization, Ministry of Agriculture, and Research Institute of Pomology, Chinese Academy of Agricultural Sciences, Xingcheng 125100, China
| | - S Jiang
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Germplasm Resources Utilization, Ministry of Agriculture, and Research Institute of Pomology, Chinese Academy of Agricultural Sciences, Xingcheng 125100, China
| | - F Wang
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Germplasm Resources Utilization, Ministry of Agriculture, and Research Institute of Pomology, Chinese Academy of Agricultural Sciences, Xingcheng 125100, China
| | - C Ou
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Germplasm Resources Utilization, Ministry of Agriculture, and Research Institute of Pomology, Chinese Academy of Agricultural Sciences, Xingcheng 125100, China
| | - Y Zhao
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Germplasm Resources Utilization, Ministry of Agriculture, and Research Institute of Pomology, Chinese Academy of Agricultural Sciences, Xingcheng 125100, China
| | - L Ma
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops, Germplasm Resources Utilization, Ministry of Agriculture, and Research Institute of Pomology, Chinese Academy of Agricultural Sciences, Xingcheng 125100, China
| | - Y Li
- Hebei Agricultural University, National Engineering Research Center for Agriculture in Northern Mountainous Areas, Biological Control Center of Plant Diseases and Plant Pests of Hebei Province, Baoding 071001, China
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15
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Zhang J, Ye Y, Sun Y, Pan D, Ou C, Dang Y, Wang Y, Cao J, Wang D. 1H NMR and multivariate data analysis of the differences of metabolites in five types of dry-cured hams. Food Res Int 2018; 113:140-148. [PMID: 30195506 DOI: 10.1016/j.foodres.2018.07.009] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 07/02/2018] [Accepted: 07/04/2018] [Indexed: 12/30/2022]
Abstract
In order to distinguish the taste styles of dry-cured hams (Jinhua, Xuanwei, Country, Parma and Bama), we established a 1H nuclear magnetic resonance spectroscopy method to identify metabolites. Totally, 33 charged metabolites, including amino acids, organic acids, nucleic acids and their derivatives, sugars, alkaloids and others were identified. The abundant glutamate, lysine, alanine, leucine and lactate could be the major contributors of taste. Total variables were explained by PC1 (67.7%) and PC2 (16.0%) which showed that Parma and Xuanwei styles were close to each other (similar amino acids, peptide, organic acids and alkaloids contents). Bama style showed the highest PC1 and amino acids, organic acids and alkaloids contents. Country style was located on the left-most area of PC1 (the lowest amino acids, organic acids and peptide, but the highest sugars contents). Sensory evaluation revealed that Bama ham had the highest overall taste score, followed by Jinhua, Parma, Xuanwei and American Country ham. We concluded that the proportions and combinations of taste components explained the specific taste instead of any single component. These findings provided a better understanding of different metabolomics among hams.
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Affiliation(s)
- Jian Zhang
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo 315211, China
| | - Yangfang Ye
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo 315211, China
| | - Yangying Sun
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo 315211, China
| | - Daodong Pan
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo 315211, China
| | - Changrong Ou
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo 315211, China
| | - Yali Dang
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo 315211, China
| | - Ying Wang
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo 315211, China
| | - Jinxuan Cao
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo 315211, China.
| | - Daoying Wang
- Institute of Agricultural Products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China.
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16
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Du X, Sun Y, Pan D, Wang Y, Ou C, Cao J. Change of the structure and the digestibility of myofibrillar proteins in Nanjing dry-cured duck during processing. J Sci Food Agric 2018; 98:3140-3147. [PMID: 29215140 DOI: 10.1002/jsfa.8815] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 11/13/2017] [Accepted: 12/02/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND To investigate the change of bioavailability and structure of myofibrillar proteins during Nanjing dry-cured duck processing, carbonyl content, sulfhydryl (SH) group, disulfide (SS) group, sodium dodecyl sulfate polyacrylamide gel electrophoresis, surface hydrophobicity, secondary structures and in vitro digestibility were determined. RESULTS During processing, carbonyl content and surface hydrophobicity increased; SH turned into SS group; α-helix turned into β-sheet and random coil fractions. Protein degradation occurred during dry-curing and drying-ripening stages. The in vitro digestibility of pepsin and pancreatic proteases increased during the salt curing stage and decreased during the drying-ripening stage. CONCLUSION The increase of digestibility could be attributed to the mild oxidation, degradation and unfolding of proteins while the decrease of digestibility was related to the intensive oxidation and aggregation of proteins. Protein degradation was not a main factor of digestibility during the drying-ripening stage. Results demonstrated that the bioavailability loss of myofibrillar proteins in Nanjing dry-cured duck occurred during the stage of drying-ripening instead of curing. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Xiaojing Du
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
| | - Yangying Sun
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
| | - Daodong Pan
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
| | - Ying Wang
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
| | - Changrong Ou
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
| | - Jinxuan Cao
- Key Laboratory of Animal Protein Food Processing Technology of Zhejiang Province, Ningbo University, Ningbo, China
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17
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Lin J, Wang Y, Pan D, Sun Y, Ou C, Cao J. Physico-mechanical properties of gelatin films modified with Lysine, Arginine and Histidine. Int J Biol Macromol 2018; 108:947-952. [DOI: 10.1016/j.ijbiomac.2017.11.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 11/02/2017] [Accepted: 11/03/2017] [Indexed: 11/15/2022]
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18
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Xiong J, Yu W, Dai W, Zhang J, Qiu Q, Ou C. Quantitative prediction of shrimp disease incidence via the profiles of gut eukaryotic microbiota. Appl Microbiol Biotechnol 2018; 102:3315-3326. [PMID: 29497796 DOI: 10.1007/s00253-018-8874-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Revised: 02/04/2018] [Accepted: 02/12/2018] [Indexed: 10/17/2022]
Abstract
One common notion is emerging that gut eukaryotes are commensal or beneficial, rather than detrimental. To date, however, surprisingly few studies have been taken to discern the factors that govern the assembly of gut eukaryotes, despite growing interest in the dysbiosis of gut microbiota-disease relationship. Herein, we firstly explored how the gut eukaryotic microbiotas were assembled over shrimp postlarval to adult stages and a disease progression. The gut eukaryotic communities changed markedly as healthy shrimp aged, and converged toward an adult-microbiota configuration. However, the adult-like stability was distorted by disease exacerbation. A null model untangled that the deterministic processes that governed the gut eukaryotic assembly tended to be more important over healthy shrimp development, whereas this trend was inverted as the disease progressed. After ruling out the baseline of gut eukaryotes over shrimp ages, we identified disease-discriminatory taxa (species level afforded the highest accuracy of prediction) that characteristic of shrimp health status. The profiles of these taxa contributed an overall 92.4% accuracy in predicting shrimp health status. Notably, this model can accurately diagnose the onset of shrimp disease. Interspecies interaction analysis depicted how the disease-discriminatory taxa interacted with one another in sustaining shrimp health. Taken together, our findings offer novel insights into the underlying ecological processes that govern the assembly of gut eukaryotes over shrimp postlarval to adult stages and a disease progression. Intriguingly, the established model can quantitatively and accurately predict the incidences of shrimp disease.
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Affiliation(s)
- Jinbo Xiong
- Faculty of Marine Science, Ningbo University, Ningbo, 315211, China. .,Collaborative Innovation Center for Zhejiang Marine High-Efficiency and Healthy Aquaculture, Ningbo, 315211, China.
| | - Weina Yu
- Faculty of Marine Science, Ningbo University, Ningbo, 315211, China.,Collaborative Innovation Center for Zhejiang Marine High-Efficiency and Healthy Aquaculture, Ningbo, 315211, China
| | - Wenfang Dai
- Faculty of Marine Science, Ningbo University, Ningbo, 315211, China.,Collaborative Innovation Center for Zhejiang Marine High-Efficiency and Healthy Aquaculture, Ningbo, 315211, China
| | - Jinjie Zhang
- Faculty of Marine Science, Ningbo University, Ningbo, 315211, China
| | - Qiongfen Qiu
- Faculty of Marine Science, Ningbo University, Ningbo, 315211, China
| | - Changrong Ou
- Faculty of Marine Science, Ningbo University, Ningbo, 315211, China
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19
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Xu B, Lefringhouse J, Liu Z, West D, Baldwin LA, Ou C, Chen L, Napier D, Chaiswing L, Brewer LD, St Clair D, Thibault O, van Nagell JR, Zhou BP, Drapkin R, Huang JA, Lu ML, Ueland FR, Yang XH. Inhibition of the integrin/FAK signaling axis and c-Myc synergistically disrupts ovarian cancer malignancy. Oncogenesis 2017; 6:e295. [PMID: 28134933 PMCID: PMC5294249 DOI: 10.1038/oncsis.2016.86] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 10/23/2016] [Accepted: 11/16/2016] [Indexed: 02/06/2023] Open
Abstract
Integrins, a family of heterodimeric receptors for extracellular matrix, are promising therapeutic targets for ovarian cancer, particularly high-grade serous-type (HGSOC), as they drive tumor cell attachment, migration, proliferation and survival by activating focal adhesion kinase (FAK)-dependent signaling. Owing to the potential off-target effects of FAK inhibitors, disruption of the integrin signaling axis remains to be a challenge. Here, we tackled this barrier by screening for inhibitors being functionally cooperative with small-molecule VS-6063, a phase II FAK inhibitor. From this screening, JQ1, a potent inhibitor of Myc oncogenic network, emerged as the most robust collaborator. Treatment with a combination of VS-6063 and JQ1 synergistically caused an arrest of tumor cells at the G2/M phase and a decrease in the XIAP-linked cell survival. Our subsequent mechanistic analyses indicate that this functional cooperation was strongly associated with the concomitant disruption of activation or expression of FAK and c-Myc as well as their downstream signaling through the PI3K/Akt pathway. In line with these observations, we detected a strong co-amplification or upregulation at genomic or protein level for FAK and c-Myc in a large portion of primary tumors in the TCGA or a local HGSOC patient cohort. Taken together, our results suggest that the integrin–FAK signaling axis and c-Myc synergistically drive cell proliferation, survival and oncogenic potential in HGSOC. As such, our study provides key genetic, functional and signaling bases for the small-molecule-based co-targeting of these two distinct oncogenic drivers as a new line of targeted therapy against human ovarian cancer.
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Affiliation(s)
- B Xu
- Department of Pharmacology and Nutritional Science, University of Kentucky, Lexington, KY, USA.,Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY, USA.,Markey Cancer Center, University of Kentucky, Lexington, KY, USA
| | - J Lefringhouse
- Department of Pharmacology and Nutritional Science, University of Kentucky, Lexington, KY, USA.,Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY, USA.,Markey Cancer Center, University of Kentucky, Lexington, KY, USA.,Department of Obstetrics and Gynecology, University of Kentucky, Lexington, KY, USA.,Department of Pathology, University of Kentucky, Lexington, KY, USA
| | - Z Liu
- Department of Pharmacology and Nutritional Science, University of Kentucky, Lexington, KY, USA.,Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY, USA.,Markey Cancer Center, University of Kentucky, Lexington, KY, USA.,Department of Respiratory Medicine, First Affiliated Hospital of Soochow University, Jiangsu Province, PR China
| | - D West
- Department of Obstetrics and Gynecology, University of Kentucky, Lexington, KY, USA.,Department of Pathology, University of Kentucky, Lexington, KY, USA
| | - L A Baldwin
- Department of Pharmacology and Nutritional Science, University of Kentucky, Lexington, KY, USA.,Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY, USA.,Markey Cancer Center, University of Kentucky, Lexington, KY, USA.,Department of Obstetrics and Gynecology, University of Kentucky, Lexington, KY, USA.,Department of Pathology, University of Kentucky, Lexington, KY, USA
| | - C Ou
- Department of Pharmacology and Nutritional Science, University of Kentucky, Lexington, KY, USA.,Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY, USA.,Markey Cancer Center, University of Kentucky, Lexington, KY, USA
| | - L Chen
- Department of Pharmacology and Nutritional Science, University of Kentucky, Lexington, KY, USA.,Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY, USA.,Markey Cancer Center, University of Kentucky, Lexington, KY, USA
| | - D Napier
- Department of Obstetrics and Gynecology, University of Kentucky, Lexington, KY, USA.,Department of Pathology, University of Kentucky, Lexington, KY, USA
| | - L Chaiswing
- Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, KY, USA
| | - L D Brewer
- Department of Pharmacology and Nutritional Science, University of Kentucky, Lexington, KY, USA.,Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY, USA.,Markey Cancer Center, University of Kentucky, Lexington, KY, USA
| | - D St Clair
- Department of Toxicology and Cancer Biology, University of Kentucky, Lexington, KY, USA
| | - O Thibault
- Department of Pharmacology and Nutritional Science, University of Kentucky, Lexington, KY, USA.,Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY, USA.,Markey Cancer Center, University of Kentucky, Lexington, KY, USA
| | - J R van Nagell
- Department of Obstetrics and Gynecology, University of Kentucky, Lexington, KY, USA.,Department of Pathology, University of Kentucky, Lexington, KY, USA
| | - B P Zhou
- Department of Pharmacology and Nutritional Science, University of Kentucky, Lexington, KY, USA.,Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY, USA.,Markey Cancer Center, University of Kentucky, Lexington, KY, USA
| | - R Drapkin
- Department of Gynecologic Cancer Research, Basser Center for BRCA, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA, USA
| | - J-A Huang
- Department of Respiratory Medicine, First Affiliated Hospital of Soochow University, Jiangsu Province, PR China
| | - M L Lu
- Department of Biomedical Science, Florida Atlantic University, Boca Raton, FL, USA
| | - F R Ueland
- Department of Obstetrics and Gynecology, University of Kentucky, Lexington, KY, USA.,Department of Pathology, University of Kentucky, Lexington, KY, USA
| | - X H Yang
- Department of Pharmacology and Nutritional Science, University of Kentucky, Lexington, KY, USA.,Department of Molecular and Cellular Biochemistry, University of Kentucky, Lexington, KY, USA.,Markey Cancer Center, University of Kentucky, Lexington, KY, USA.,Department of Respiratory Medicine, First Affiliated Hospital of Soochow University, Jiangsu Province, PR China
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20
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wu C, Gan N, Ou C, Tang H, Zhou Y, Cao J. A homogenous “signal-on” aptasensor for antibiotics based on a single stranded DNA binding protein-quantum dot aptamer probe coupling exonuclease-assisted target recycling for signal amplification. RSC Adv 2017. [DOI: 10.1039/c6ra27337h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The method is based on replacement reaction, just by mixing the probes with targets for detection, which is simple and easy for manipulation.
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Affiliation(s)
- Caiye wu
- Faculty of Marine
- Ningbo University
- Ningbo
- China
- Faculty of Material Science and Chemical Engineering
| | - Ning Gan
- Faculty of Material Science and Chemical Engineering
- Ningbo University
- Ningbo
- China
| | | | - Haiqing Tang
- School of Food Science and Technology
- Zhejiang Pharmaceutical College
- Ningbo
- China
| | - You Zhou
- Faculty of Material Science and Chemical Engineering
- Ningbo University
- Ningbo
- China
| | - Jinxuan Cao
- Faculty of Marine
- Ningbo University
- Ningbo
- China
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21
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Huang J, Gan N, Lv F, Cao Y, Ou C, Tang H. Environmentally friendly solid-phase microextraction coupled with gas chromatography and mass spectrometry for the determination of biogenic amines in fish samples. J Sep Sci 2016; 39:4384-4390. [PMID: 27753266 DOI: 10.1002/jssc.201600893] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 09/12/2016] [Accepted: 09/21/2016] [Indexed: 12/29/2022]
Abstract
In this work, a facile and environmentally friendly solid-phase microextraction assay based on on-fiber derivatization coupled with gas chromatography and mass spectrometry was developed for determining four nonvolatile index biogenic amines (putrescine, cadaverine, histamine, and tyramine) in fish samples. In the assay, the fiber was firstly dipped into a solution with isobutyl chloroformate as derivatization reagent and isooctane as extraction solvent. Thus, a thin organic liquid membrane coating was developed. Then the modified fiber was immersed into sample solution to extract four important bioamines. Afterwards, the fiber was directly inserted into gas chromatography injection port for thermal desorption. 1,7-Diaminoheptane was employed as internal standard reagent for quantification of the targets. The limits of detection of the method were 2.98-45.3 μg/kg. The proposed method was successfully applied to the detection of bioamines in several fish samples with recoveries ranging 78.9-110%. The organic reagent used for extraction was as few as microliter that can greatly reduce the harm to manipulator and environment. Moreover, the extraction procedures were very simple without concentration and elution procedures, which can greatly simplify the pretreatment process. The assay can be extended to the in situ screening of other pollutant in food safety by changing the derivatization reagent.
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Affiliation(s)
- Jie Huang
- Faculty of Marine Science, Ningbo University, Ningbo, China.,Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China
| | - Ning Gan
- Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo, China
| | - Fangying Lv
- Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo, China
| | - Yuting Cao
- Faculty of Materials Science and Chemical Engineering, Ningbo University, Ningbo, China
| | - Changrong Ou
- Faculty of Marine Science, Ningbo University, Ningbo, China.,Collaborative Innovation Center for Zhejiang Marine High-efficiency and Healthy Aquaculture, Ningbo, China
| | - Haiqing Tang
- Faculty of Food Science, Zhejiang Pharmaceutical College, Ningbo, China
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22
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Li S, Zhou Y, Williams G, Jaakkola J, Ou C, Chen S, Yao T, Qin T, Wu S, Guo Y. Seasonality and temperature effects on fasting plasma glucose: A population-based longitudinal study in China. Diabetes & Metabolism 2016; 42:267-75. [DOI: 10.1016/j.diabet.2016.01.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2015] [Revised: 01/05/2016] [Accepted: 01/08/2016] [Indexed: 01/05/2023]
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23
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Lu H, Shao X, Cao J, Ou C, Pan D. Antimicrobial activity of eucalyptus essential oil againstPseudomonas in vitroand potential application in refrigerated storage of pork meat. Int J Food Sci Technol 2016. [DOI: 10.1111/ijfs.13052] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hao Lu
- Department of Food Science and Engineering; Ningbo University; Ningbo Zhejiang 315211 China
| | - Xingfeng Shao
- Department of Food Science and Engineering; Ningbo University; Ningbo Zhejiang 315211 China
| | - Jinxun Cao
- Department of Food Science and Engineering; Ningbo University; Ningbo Zhejiang 315211 China
| | - Changrong Ou
- Department of Food Science and Engineering; Ningbo University; Ningbo Zhejiang 315211 China
| | - Daodong Pan
- Department of Food Science and Engineering; Ningbo University; Ningbo Zhejiang 315211 China
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24
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Winemiller KO, McIntyre PB, Castello L, Fluet-Chouinard E, Giarrizzo T, Nam S, Baird IG, Darwall W, Lujan NK, Harrison I, Stiassny MLJ, Silvano RAM, Fitzgerald DB, Pelicice FM, Agostinho AA, Gomes LC, Albert JS, Baran E, Petrere M, Zarfl C, Mulligan M, Sullivan JP, Arantes CC, Sousa LM, Koning AA, Hoeinghaus DJ, Sabaj M, Lundberg JG, Armbruster J, Thieme ML, Petry P, Zuanon J, Torrente Vilara G, Snoeks J, Ou C, Rainboth W, Pavanelli CS, Akama A, van Soesbergen A, Sáenz L. Balancing hydropower and biodiversity in the Amazon, Congo, and Mekong. Science 2016; 351:128-9. [PMID: 26744397 DOI: 10.1126/science.aac7082] [Citation(s) in RCA: 346] [Impact Index Per Article: 43.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Affiliation(s)
| | - P B McIntyre
- See supplementary materials for author affiliations
| | - L Castello
- See supplementary materials for author affiliations
| | | | - T Giarrizzo
- See supplementary materials for author affiliations
| | - S Nam
- See supplementary materials for author affiliations
| | - I G Baird
- See supplementary materials for author affiliations
| | - W Darwall
- See supplementary materials for author affiliations
| | - N K Lujan
- See supplementary materials for author affiliations
| | - I Harrison
- See supplementary materials for author affiliations
| | | | | | | | - F M Pelicice
- See supplementary materials for author affiliations
| | | | - L C Gomes
- See supplementary materials for author affiliations
| | - J S Albert
- See supplementary materials for author affiliations
| | - E Baran
- See supplementary materials for author affiliations
| | - M Petrere
- See supplementary materials for author affiliations
| | - C Zarfl
- See supplementary materials for author affiliations
| | - M Mulligan
- See supplementary materials for author affiliations
| | - J P Sullivan
- See supplementary materials for author affiliations
| | - C C Arantes
- See supplementary materials for author affiliations
| | - L M Sousa
- See supplementary materials for author affiliations
| | - A A Koning
- See supplementary materials for author affiliations
| | | | - M Sabaj
- See supplementary materials for author affiliations
| | - J G Lundberg
- See supplementary materials for author affiliations
| | - J Armbruster
- See supplementary materials for author affiliations
| | - M L Thieme
- See supplementary materials for author affiliations
| | - P Petry
- See supplementary materials for author affiliations
| | - J Zuanon
- See supplementary materials for author affiliations
| | | | - J Snoeks
- See supplementary materials for author affiliations
| | - C Ou
- See supplementary materials for author affiliations
| | - W Rainboth
- See supplementary materials for author affiliations
| | | | - A Akama
- See supplementary materials for author affiliations
| | | | - L Sáenz
- See supplementary materials for author affiliations
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25
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Lu XX, Zhu LQ, Pang F, Sun W, Ou C, Li Y, Cao J, Hu YL. Relationship between RUNX3 methylation and hepatocellular carcinoma in Asian populations: a systematic review. Genet Mol Res 2014; 13:5182-9. [PMID: 25061743 DOI: 10.4238/2014.july.7.11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Runt-related transcription factor 3 (RUNX3) is a potential tumor suppressor that is frequently hypermethylated in hepatocellular carcinoma (HCC). The present meta-analysis of case-control studies was carried out to determine whether RUNX3 hypermethylation is associated with HCC. The PubMed, Embase, and Chinese National Knowledge Infrastructure databases were searched for all relevant studies published between May 2000 and May 2012. A total of 11 studies were identified, and 8 studies involving 491 patients with HCC and 409 patients without tumors were found to satisfy the inclusion criteria for the meta-analysis. All tissue samples were from Asian populations. There was significant heterogeneity between the studies. Over the entire sample, the odds ratio (OR) of RUNX3 promoter methylation was 18.5 [95% confidence interval (CI), 11.6-29.6] for HCC tissues relative to control tissues. The ORs of RUNX3 methylation were 16.6 (95%CI = 6.5-42.4) for tumor tissues relative to tumor-adjacent tissues in patients with HCC, 67.3 (95%CI = 13.0-348.5) for tumor tissues from patients with HCC relative to liver tissues from patients with non-neoplastic liver diseases, and 3.26 (95%CI = 1.54-6.90) for tissues from patients with hepatitis C virus (HCV)- related HCC relative to liver tissues from patients with HCC unrelated to HCV. There was no association between RUNX3 methylation and age, gender, pathological stage, or hepatitis B virus infection in HCC tissues. Methylation of the RUNX3 promoter strongly correlated with HCC in Asian populations, especially in individuals with HCV-related HCC, and may be a useful marker for HCC diagnosis in these populations.
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Affiliation(s)
- X X Lu
- Research Department, Tumor Hospital of Guangxi Medical University, Nanning, China
| | - L Q Zhu
- Research Department, Tumor Hospital of Guangxi Medical University, Nanning, China
| | - F Pang
- Guangxi Medical University, Nanning, China
| | - W Sun
- Research Department, Tumor Hospital of Guangxi Medical University, Nanning, China
| | - C Ou
- Research Department, Tumor Hospital of Guangxi Medical University, Nanning, China
| | - Y Li
- Research Department, Tumor Hospital of Guangxi Medical University, Nanning, China
| | - J Cao
- Research Department, Tumor Hospital of Guangxi Medical University, Nanning, China
| | - Y L Hu
- Medical Scientific Research Centre, Guangxi Medical University, Nanning, China
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Shao Y, Li C, Ou C, Zhang P, Lu Y, Su X, Li Y, Li T. Divergent metabolic responses of Apostichopus japonicus suffered from skin ulceration syndrome and pathogen challenge. J Agric Food Chem 2013; 61:10766-10771. [PMID: 24127639 DOI: 10.1021/jf4038776] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Skin ulceration syndrome (SUS) is the main limitation in the development of Apostichopus japonicus culture industries, in which Vibrio splendidus has been well documented as one of the major pathogens. However, the intrinsic mechanisms toward pathogen challenge and disease outbreak remain largely unknown at the metabolic level. In this work, the metabolic responses were investigated in muscles of sea cucumber among natural SUS-diseased and V. splendidus-challenged samples. The pathogen did not induce obvious biological effects in A. japonicus samples after infection for the first 24 h. An enhanced energy storage (or reduced energy demand) and immune responses were observed in V. splendidus-challenged A. japonicus samples at 48 h, as marked by increased glucose and branched chain amino acids, respectively. Afterward, infection of V. splendidus induced significant increases in energy demand in A. japonicus samples at both 72 and 96 h, confirmed by decreased glucose and glycogen, and increased ATP. Surprisingly, high levels of glycogen and glucose and low levels of threonine, alanine, arginine, glutamate, glutamine, taurine and ATP were founded in natural SUS-diseased sea cucumber. Our present results provided essential metabolic information about host-pathogen interaction for sea cucumber, and informed that the metabolic biomarkers induced by V. splendidus were not usable for the prediction of SUS disease in practice.
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Affiliation(s)
- Yina Shao
- School of Marine Sciences, Ningbo University , Ningbo, Zhejiang Province 315211, P.R China
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Wong CM, Peiris JSM, Yang L, Chan KP, Thach TQ, Lai HK, Lim WWL, Hedley AJ, He J, Chen P, Ou C, Deng A, Zhang X, Zhou D, Ma S, Chow A. Effect of influenza on cardiorespiratory and all-cause mortality in Hong Kong, Singapore and Guangzhou. Hong Kong Med J 2012; 18 Suppl 2:8-11. [PMID: 22311353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023] Open
Abstract
1. Using a common modelling approach, mortality attributable to influenza was higher in the two subtropical cities Guangzhou and Hong Kong than in the tropical city Singapore. 2. The virus activity appeared more synchronised in subtropical cities, whereas seasonality of influenza tended to be less marked in the tropical city. 3. High temperature was associated with increased mortality after influenza infection in Hong Kong, whereas relative humidity was an effect modifier for influenza in Guangzhou. No effect modification was found for Singapore. 4. Seasonal and environmental factors probably play a more important role than socioeconomic factors in regulating seasonality and disease burden of influenza. Further studies are needed in identifying the mechanism behind the regulatory role of environmental factors.
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Affiliation(s)
- C M Wong
- Department of Community Medicine and School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong
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Ou C, Du X, Shellie K, Ross C, Qian MC. Volatile compounds and sensory attributes of wine from Cv. Merlot (Vitis vinifera L.) grown under differential levels of water deficit with or without a kaolin-based, foliar reflectant particle film. J Agric Food Chem 2010; 58:12890-12898. [PMID: 21080711 DOI: 10.1021/jf102587x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The volatile composition and sensory attributes of Merlot wines produced from vines under differing levels of water stress, with or without a foliar, kaolin-based particle film, were analyzed by stir bar sorptive extraction-gas chromatography-mass spectrometry (SBSE-GC-MS) and sensory evaluation. Vines were irrigated over consecutive vintages with 100, 70, or 35% of their estimated water requirements (ET(c)), or 35% until color change then 70% until harvest (35-70% ET(c)). Neither of the treatments consistently influenced ester concentrations or their relative amounts, though their concentrations varied from year to year. However, deficit irrigation had an effect on the concentration of terpene alcohols and norisoprenoids. Wines produced from vines under water deficit contained higher amounts of citronellol, nerol, geraniol, and β-damascenone, but linalool and β-ionone were not affected by deficit irrigation. Particle film did not affect volatile composition in the wine. Untrained panelists in 2007 and 2008 distinguished between wines from vines that received 100 or 35% ET(c) and between wines from vines that received 35 or 35-70% ET(c). Trained sensory panelists detected differences among wines for aroma, flavor, taste, and mouthfeel; however, significant interactive effects between particle film application and vine water status hindered interpretation of independent main effects.
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Affiliation(s)
- Changrong Ou
- Department of Food Science and Technology, 100 Wiegand Hall, Oregon State University, Corvallis, Oregon 97331, United States
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Hsu S, Tseng Y, Liu J, Shih S, Ou C, Chang L, Chen Y, Hong K, Melillo G, Yang L. TLC388, a Novel Topotecan Derivative, as a Chemoradiosensitizer. Int J Radiat Oncol Biol Phys 2009. [DOI: 10.1016/j.ijrobp.2009.07.1279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Mitchell JA, Ou C, Chen Z, Nishimura T, Lye SJ. Parathyroid hormone-induced up-regulation of connexin-43 messenger ribonucleic acid (mRNA) is mediated by sequences within both the promoter and the 3'untranslated region of the mRNA. Endocrinology 2001; 142:907-15. [PMID: 11159864 DOI: 10.1210/endo.142.2.7930] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The gap junction protein connexin 43 (Cx43) mediates communication between osteoblasts and is important for maximal PTH responsiveness. We examined the role of the Cx43 promoter and messenger RNA 3' untranslated region (UTR) in conferring responsiveness to PTH in the rat osteosarcoma cell line UMR-106. PTH induced a 4-fold increase in luciferase activity of a reporter construct containing 1.6 kb 5' of the transcription start site. Deletion analysis of the promoter localized responsive sequences to between -31 to +1 bp. PTH treatment of transgenic mice containing the 1.6 kb promoter luciferase construct induced increases in luciferase and Cx43 immunoreactivity in bone cells underlying the tibial growth plate. The full Cx43 3'UTR conferred a 3-fold response to PTH when placed 3' of a CMV-luciferase construct. Deletion analysis localized responsive sequences to between 2510 and 3132 of the 3'UTR. Cloning of this segment 5' of the CMV promoter disrupted the PTH response, indicating this sequence does not function as an enhancer. Sequences within the promoter conferred responsiveness to forskolin, whereas the 3'UTR responded to both TPA and forskolin. These data indicate that PTH responsive sequences are present in the Cx43 promoter and 3'UTR, suggesting that transcriptional and posttranscriptional pathways operate to regulate PTH-induced Cx43 expression in osteoblast cells.
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Affiliation(s)
- J A Mitchell
- Program in Development and Fetal Health, Samuel Lunenfeld Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada M5G 1X5
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Shulman RJ, Ou C, Reed T, Gardner P. Central venous catheters versus peripheral veins for sampling blood levels of commonly used drugs. JPEN J Parenter Enteral Nutr 1998; 22:234-7. [PMID: 9661125 DOI: 10.1177/0148607198022004234] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Our objective was to compare the accuracy of drug levels in blood samples obtained from central venous catheters with those from peripheral blood samples taken to monitor various drug levels. METHODS Pediatric patients with central venous catheters receiving aminoglycosides, vancomycin, or cyclosporine had central and peripheral blood samples obtained within 5 minutes of each other and analyzed simultaneously. We ascertained how well blood levels from central venous catheters compared with those from peripheral blood (the criterion standard). RESULTS There were no clinically significant differences between central and peripheral values for amikacin, gentamicin, tobramycin, and vancomycin (both peaks and troughs). Preliminary data indicated that oral cyclosporine can be monitored via central venous catheter. In contrast, there was poor agreement between peripheral and central values when cyclosporine was administered by IV. CONCLUSIONS Amikacin, gentamicin, tobramycin, vancomycin, and probably oral cyclosporine can be monitored accurately via central venous catheter. In contrast, IV cyclosporine should be monitored via peripheral blood.
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Affiliation(s)
- R J Shulman
- US Department of Agriculture/Agriculture Research Service Children's Nutrition Research Center, Department of Pediatrics; Houston, TX, USA
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Amend J, Ou C, Ryan-MacFarlane C, Anderson PJ, Amend N, Biro GP. Systemic responses to SFHS-infusion in hemorrhaged dogs. Artif Cells Blood Substit Immobil Biotechnol 1996; 24:19-34. [PMID: 8714716 DOI: 10.3109/10731199609117428] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Anesthetized mongrel (weight range: 16-27 Kg) dogs were prepared for monitoring hemodynamics, blood flow distribution, plasma colloid osmotic pressure and renal functional parameters at various intervals. Removal of 35 ml/Kg blood resulted in marked drop and only partial spontaneous recovery in systemic and pulmonary arterial pressures, cardiac output and organ blood flows (> 50% flow-decrements occurred in kidney, spleen, heart, gut and pancreas); plasma colloid osmotic pressure as well as urine output and creatinine clearance also fell. Group I (n = 6) of dogs was transfused after 45 minutes of hypovolemia with their own anticoagulated blood, while Group II (n = 6) received an equal volume of unmodified 6% stromafree hemoglobin solution (SFHS). Comparison of the two groups' responses to resuscitation yielded some differences. There was a significant overshoot (30 mmHg) in systemic arterial blood pressure accompanied by bradycardia in Group II only. Cardiac output recovered in both groups but was less well sustained in Group II. Cerebral blood flow rose higher and hepatic arterial flow-increment was less in Group II than in Group I; the responses to resuscitation in the other organs were comparable. Colloid osmotic pressure decreased in Group I whereas it rose immediately after resuscitation in Group II, declining thereafter with a converging trend and 30 minutes thereafter the differences were not significant between the groups. Urine excretion and creatinine clearance recovered to comparable extents in both groups, but N-acetyl-beta-D-glucosaminidase (N.A.G.) excretion rose over 10-fold higher in Group II than in Group I. These experiments have defined the response of bled animals to resuscitation with unmodified, unpurified SFHS, when compared to resuscitation with whole blood, showing a less well sustained but adequate hemodynamic and renal functional recovery while revealing indications of early renal tubular cellular injury, providing baseline comparison for testing highly purified and modified hemoglobin solutions.
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Affiliation(s)
- J Amend
- Dept. of Physiology, University of Ottawa, ON, Canada
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Abstract
STUDY OBJECTIVE To determine the digestion and absorption of lactose, a combination of lactose and glucose polymers, and glucose polymers alone in infants born at 28 to 42 weeks of gestation. DESIGN Each infant received the three carbohydrate solutions (85 gm/L concentration) in random order. SETTING Tertiary care urban children's hospital. INTERVENTIONS A double-lumen perfusion catheter was placed in the duodenum-jejunum. Absorption was defined as the disappearance of the carbohydrate and all its components (e.g., for lactose: galactose, glucose). MEASUREMENTS AND MAIN RESULTS Absorption of lactose was less than that of the lactose-glucose polymer combination and the glucose polymers alone. There was no relationship between lactose absorption and postnatal age, whereas absorption of the lactose-glucose polymer combination and the glucose polymers alone correlated with age. Lactose absorption was not related to the number of days that the infants received full-strength feedings or the total number of days of feeding before the study, whereas absorption of both the lactose-glucose polymer combination and the glucose polymers alone was related to both. Absorption of the three solutions was not related to gestational age or to the number of days before the initial feeding. Lactose absorption was greater in infants who received formula alone than in infants fed formula together with human milk. CONCLUSIONS Premature infants do not digest and absorb lactose as well as glucose polymers. However, lactose does not impair the absorption of glucose polymers. Lactose assimilation is not affected by maturation, but the type of diet may affect lactose digestion and absorption. In contrast, digestion and absorption of glucose polymers are related to both postnatal age and diet.
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Affiliation(s)
- R J Shulman
- U.S. Department of Agriculture/Agricultural Research Service (USDA/ARS) Children's Nutrition Research Center, Houston, TX, USA
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Biro GP, Ou C, Ryan-MacFarlane C, Anderson PJ. Oxyradical generation after resuscitation of hemorrhagic shock with blood or stroma-free hemoglobin solution. Artif Cells Blood Substit Immobil Biotechnol 1995; 23:631-45. [PMID: 8556138 DOI: 10.3109/10731199509117977] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Hypovolemic states are characterized by inadequate tissue perfusion; when this state is reversed, the reintroduction of oxygen is accompanied by the excess generation of oxyradicals and these, in turn, may cause "reperfusion injury" in susceptible tissues. When hemoglobin solution is used to resuscitate the hypovolemic state, the generation of oxyradicals may be enhanced by catalytic means. The generation of oxyradicals was estimated in dogs subjected to the acute removal of 35 ml/Kg blood, and resuscitated 45 mins thereafter with an equal volume of either autologous blood (Group I, n = 6) or 6% stromafree hemoglobin solution (S.F.H.S.) (Group II, n = 6). Hepatic and pancreatic enzymes were measured in blood drawn at intervals. The hypovolemic state was characterized by profound hypotension which was reversed by resuscitation. Oxyradical generation in arterial blood samples, drawn at various times, was estimated by the generation of oxidation products (2,3- and 2,5-dihydroxybenzoic acid) of exogenously administered sodium salicylate, determined by HPLC in plasma samples extracted with diethyl ether. Salicylate oxidation products rose significantly above the baseline value in Group I dogs, whereas they rose 5-6-fold higher than the baseline values in those of Group II. The actual values attained and the increments were significantly (p < .05) greater in Group II than in Group I. In the group resuscitated with S.F.H.S., catalytically active iron concentration in plasma also rose 10-12-fold higher and was associated with spuriously elevated levels of gamma-glutamyl transferase due to interference with the assay. These findings are consistent with the hypothesis that blood-resuscitation of hypovolemic shock is accompanied by oxyradical generation of a modest degree; in contrast, S.F.H.S.-resuscitation introduces catalytically active iron and is accompanied by oxyradical generation of a significantly greater degree.
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Affiliation(s)
- G P Biro
- Dept. of Physiology, Faculty of Medicine, University of Ottawa, ON, Canada
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Leenen FH, Harmsen E, Yu H, Ou C. Effects of dietary sodium on central and peripheral ouabain-like activity in spontaneously hypertensive rats. Am J Physiol 1993; 264:H2051-5. [PMID: 8322933 DOI: 10.1152/ajpheart.1993.264.6.h2051] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
High dietary Na+ intake enhances pressor and sympathoexcitatory responses in spontaneously hypertensive rats (SHR) but not Wistar-Kyoto (WKY) rats. To evaluate the possible contribution of central ouabain-like activity (OLA), brain and peripheral OLA was assessed in SHR vs. WKY rats at 4 wk of age and after 2 and 4 wk of high vs. control Na+ intake started at 4 wk of age. In SHR, hypertension developed with maturation and was exacerbated by high Na+ intake. With control Na+ intake, SHR showed higher OLA at 4, 6, and 8 wk of age in the pituitary and hypothalamus and also by 8 wk in the adrenals and left ventricle but not in plasma. High Na+ intake increased OLA in all tissues examined in both WKY rats and SHR. After 2 wk on high Na+, only OLA in hypothalamus and pituitary was higher in SHR vs. WKY rats; after 4 wk on high Na+, peripheral (i.e., adrenals, left ventricle, and plasma) OLA was also higher. These results indicate that in SHR the development of hypertension is associated early on with increases in central OLA and in a later phase with increases in peripheral OLA as well. High Na+ intake increases OLA in both SHR and WKY rats, but the higher OLA may affect sympathetic activity and blood pressure only in SHR.
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Affiliation(s)
- F H Leenen
- Hypertension Unit, University of Ottawa Heart Institute, Ontario, Canada
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Abstract
The phospholipase D (PL D), which catalyzes the formation of phosphatidic acid (PA), was studied in rat myocardium using 14C-labelled phosphatidylcholine (PC) as an exogenous substrate. Subcellular distribution experiments indicated the presence of PL D in particulate fractions only. Different procedures for the isolation of purified cardiac subcellular organelles showed the presence of PL D in sarcolemma (SL), sarcoplasmic reticulum (SR) and mitochondria with 14-, 11- and 5-fold enrichment when compared to the homogenate value, respectively. The activity of SL PL D was observed over a narrow acid pH range with an optimum at 6.5, and it showed a high specificity for PC while phosphatidylethanolamine and phosphatidylinositol showed a low rate of hydrolysis. Under optimal conditions, PA formation was linear for a 90-min period of incubation and the reaction rate was constant for 10 to 100 micrograms SL protein in the assay medium. The SR PL D displayed properties similar to those seen with the SL PL D. In membrane fractions PL D was also found to catalyze a transphosphatidylation reaction for the synthesis of phosphatidylglycerol. Assessment of the intramembranal levels of radioactive 1,2-diacylglycerol (DAG) in the absence or presence of KF suggested the presence of an active PA phosphohydrolase activity. This study indicates that a PC-specific PL D activity is localized in different membrane systems of the myocardium and may be associated with PA phosphohydrolase to act in a coordinated manner. The functional significance of PL D-dependent formation of PA in cardiac membranes is discussed.
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Affiliation(s)
- V Panagia
- Division of Cardiovascular Sciences, St. Boniface General Hospital Research Centre, Winnipeg, Manitoba, Canada
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Moriya M, Ou C, Bodepudi V, Johnson F, Takeshita M, Grollman AP. Site-specific mutagenesis using a gapped duplex vector: a study of translesion synthesis past 8-oxodeoxyguanosine in E. coli. Mutat Res 1991; 254:281-8. [PMID: 2052015 DOI: 10.1016/0921-8777(91)90067-y] [Citation(s) in RCA: 237] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
We have constructed a gapped plasmid vector in which a single defined lesion is introduced, site-specifically, within a single-strand region. Efficiency of translesional synthesis is determined by the number of colonies recovered following transformation of E. coli. The nucleotide sequence of progeny plasmids in the gapped region of the vector reflects incorporation of bases opposite and near the lesion. The analysis detects non-mutagenic as well as mutagenic events. This system was used to establish the mutagenic potential of 2'-deoxy-7,8-dihydro-8-oxoguanosine (8-oxodG), a lesion produced by the action of active oxygen species on DNA. The presence of 8-oxodG did not affect the number of transformants recovered. Most transformants (greater than 99%) contained G:C pairs at the site of the lesion; however, a limited number of targeted G----T transversions were observed in the presence and absence of SOS induction. Base substitutions neighboring the lesion, reported for an in vitro system, were not observed. We conclude that the 8-oxodG lesion in DNA is weakly mutagenic in E. coli.
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Affiliation(s)
- M Moriya
- Department of Pharmacological Sciences, State University of New York, Stony Brook 11794-8651
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Kaneko M, Panagia V, Paolillo G, Majumder S, Ou C, Dhalla NS. Inhibition of cardiac phosphatidylethanolamine N-methylation by oxygen free radicals. Biochim Biophys Acta 1990; 1021:33-8. [PMID: 2153025 DOI: 10.1016/0005-2736(90)90380-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
This study was undertaken to examine the effects of oxygen free radicals on phosphatidylethanolamine (PE) N-methylation in rat heart sarcolemmal (SL) and sarcoplasmic reticular (SR) membranes. Three catalytic sites involved in the sequential methyl transfer reaction were studied by assaying the incorporation of radiolabeled methyl groups from S-adenosyl-L-methionine (0.055, 10, and 150 microM) into SL or SR PE molecules under optimal conditions. In the presence of xanthine + xanthine oxidase (superoxide anion radicals generating system), PE N-methylation was inhibited at site I and III in the heavy SL fraction isolated by the hypotonic shock-LiBr treatment method. In the light SL fraction isolated by sucrose-density gradient, a significant inhibition of PE N-methylation was seen at all three sites. These inhibitory effects of xanthine + xanthine oxidase on PE N-methylation were prevented by the addition of superoxide dismutase. Hydrogen peroxide showed a significant inhibition of PE N-methylation at site I in the heavy SL fraction, and at site I and II in the light SL fraction. Catalase blocked the inhibitory effects of hydrogen peroxide. The effects of both xanthine + xanthine oxidase and hydrogen peroxide on the SR membranes were similar to those seen for the heavy SL fraction. These results suggest that, in addition to lipid peroxidation, the oxygen free radicals may affect the function of cardiac membranes by decreasing the phospholipid N-methylation activity.
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Affiliation(s)
- M Kaneko
- Division of Cardiovascular Sciences, St. Boniface General Hospital Research Centre, Winnipeg, Canada
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Abstract
Poor penetration of antibiotics into paralyzed tissue may contribute to the difficulty of curing soft tissue infections in paralyzed limbs. A novel model of spinal cord hemisection was used to induce paralysis of one hind leg in mice. Five, 10, or 20 days after induction of paralysis, six groups of 10 mice were injected intravenously with a single dose or with four sequential doses of cefepime, a new broad-spectrum cephalosporin, and then sacrificed. High-performance liquid chromatography was used to compare cefepime levels in soft tissue homogenates of paralyzed and normal hind legs; no significant differences were found in any group. Factors other than antibiotic delivery may be responsible for difficulty in curing infections in paralyzed soft tissue.
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Affiliation(s)
- R Darouiche
- Medical Service (Infectious Disease Section), Houston Veterans Administration Medical Center, Texas
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Yang WK, d'Auriol L, Yang DM, Kiggnas JO, Ou C, Périès J, Emanoil-Ravicovitch R. Restricted infectivity of ecotropic type C retroviruses in mouse teratocarcinoma cells: studies on viral DNA intermediates. J Supramol Struct 1980; 14:223-32. [PMID: 6262577 DOI: 10.1002/jss.400140211] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Replication of Gross strain N-tropic type C retrovirus was markedly restricted in a pluripotential undifferentiated embryonal cell line (PCC4) of murine teratocarcinoma, whereas the same virus could cause productive infection in a myoblast-derived differentiated line (PCD1) of the same tumor origin. To investigate the restriction mechanism, we compared the initial viral DNA formation in these two cell lines. Analyses by means of a modified Hirt extraction procedure and a modified Southern gel transfer method indicated that PCC4 and PCD1 cells supported the synthesis of viral DNA intermediates after inoculation of the Gross virus. In both cells, a linear DNA duplex (from III viral DNA) appeared at 4 hr, reached a maximal level at 8-9 hr, and declined rapidly thereafter, while two closed-circular supercoiled DNA duplexes (form I viral DNA) showed their appearance, increase and decline in the 8-24 hr period. During the period from 34 to 78 hr after virus inoculation, another burst of viral DNA synthesis occurred in PCD1 cells, presumably due to secondary virus infection, while at this period both form III and form I viral DNAs became undetectable in PCC4 cells. The Hirt supernatant DNAs prepared from PCD1 and PCC4 cells 10 hr after virus inoculation were equally infectious for NIH3T3 cells in a DNA transfection, although one positive result with PCD1 cells might suggest a difference between the two cell types in this aspect. These results indicate that restriction of type C retrovirus in undifferentiated embryonal carcinoma cells occurs at a step subsequent to formation and maturation of viral DNA intermediates.
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Schugar HJ, Ou C, Thich JA, Potenza JA, Lalancette RA, Furey W. Letter: Molecular structure and copper(II)-mercaptide charge-transfer spectra of a novel Cu14(SC(CH3)2CH2NH2)12Cl cluster. J Am Chem Soc 1976; 98:3047-8. [PMID: 1262637 DOI: 10.1021/ja00426a078] [Citation(s) in RCA: 43] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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