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Su Y, Chen Y, Sun M, Ren A, Li J, Liu Z, Zheng T. Tailoring the physicochemical properties of starch: impact of integrated ultrasonic and ethanol pretreatment on the oil uptake of infrared fried ginkgo seeds. J Sci Food Agric 2024. [PMID: 38477402 DOI: 10.1002/jsfa.13417] [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] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 01/16/2024] [Accepted: 03/13/2024] [Indexed: 03/14/2024]
Abstract
BACKGROUND The structural changes of starch would have a more crucial impact on oil absorption and quality changes in starch-rich fruits and vegetables during frying process with enhanced heat transfer (such as infrared frying). In the present study, the influence of integrated ultrasonic and ethanol (US + ethanol) pretreatment on oil uptake in infrared fried (IF) ginkgo seeds was evaluated regarding modifications in the physicochemical properties of starch. The pretreatment was performed with ultrasonic (40 kHz, 300 W) and ethanol osmotic (95%, v/v) treatment individually or integrated for 40 min. RESULTS The mass transfer in the pretreatment was facilitated by combined ultrasound and ethanol. The swelling power, solubility, and gelatinization degree of starch was significantly increased. Low-frequency-NMR curves and images revealed that the bound water fraction in ginkgo seeds was increased and the water distribution was homogenized. The results of Fourier transform-infrared spectrum and differential scanning calorimeter revealed that the crystalline regions of starch were reduced and the thermal enthalpy was decreased after US + ethanol pretreatment. The total, surface and structural oil content in IF ginkgo seeds with US + ethanol pretreatment was reduced by 29.10%, 34.52% and 29.73%, respectively. The US + ethanol pretreatment led to a thinner crust layer with increased porosity and smaller-sized pores in the IF ginkgo seeds as observed by stereo microscopy and scanning electron microscopy. CONCLUSION The changes in structural and physicochemical properties of starch by combined ultrasound and ethanol affect the crust ratio and pore characteristics in fried high-starch fruits and vegetables, thereby reducing oil absorption. © 2024 Society of Chemical Industry.
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Affiliation(s)
- Ya Su
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, China
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Ying Chen
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, China
| | - Menglin Sun
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, China
| | - Aiqing Ren
- Institute of Food Research, Hezhou University, Hezhou, China
| | - Jianlin Li
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, China
| | - Zhenbin Liu
- Shaanxi Research Institute of Agricultural Products Processing Technology, Xi'an, China
| | - Tiesong Zheng
- School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, China
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Huang YX, Zeng XF, Ren A, Zhao SF. Tension-free hernioplasty for giant incisional hernia of abdominal wall: A case report. Asian J Surg 2024; 47:1254-1255. [PMID: 38071094 DOI: 10.1016/j.asjsur.2023.11.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Accepted: 11/10/2023] [Indexed: 02/08/2024] Open
Affiliation(s)
- Yu-Xiang Huang
- First Clinical Medical College, The Gannan Medical University, Ganzhou, China
| | - Xiang-Fu Zeng
- Department of G Surgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - A Ren
- First Clinical Medical College, The Gannan Medical University, Ganzhou, China
| | - Shu-Feng Zhao
- Department of G Surgery, The First Affiliated Hospital of Gannan Medical University, Ganzhou, China.
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Meng X, Shen Q, Song T, Zhao H, Zhang Y, Ren A, Yang W. Facile Fabrication of Anthocyanin-Nanocellulose Hydrogel Indicator Label for Intelligent Evaluation of Minced Pork Freshness. Foods 2023; 12:2602. [PMID: 37444340 DOI: 10.3390/foods12132602] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 05/31/2023] [Revised: 06/25/2023] [Accepted: 06/26/2023] [Indexed: 07/15/2023] Open
Abstract
In order to develop a reliable and rapid method for meat freshness detection, nanocellulose (TOCNF) prepared via the TEMPO (2,2,6,6-tetramethylpiperidine oxidation) oxidation method was used as raw material to prepare hydrogels using Zn2+ coordination and binding. Physicochemical properties such as water absorption and porosity were analyzed. It was further used to select suitable hydrogels for the preparation of indication labels after anthocyanin adsorption, and it was applied in the freshness detection of fresh minced pork. Five percent TOCNF (w/w) aqueous solution was homogenized by high shear for 4 min, and 20% (w/w) zinc chloride solution was added to it, so that the concentration of zinc ions could reach 0.25 mol/L. After standing for 24 h, the hydrogel was obtained with good water absorption and a porous three-dimensional network structure. The activation energies of volatile base nitrogen (TVBN) and anthocyanin indicating label color changes were 59.231 kJ/mol and 69.453 kJ/mol, respectively. The difference between the two is within 25 kJ/mol, so the prepared indicator label can accurately visualize the shelf life of fresh pork.
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Affiliation(s)
- Xiangyong Meng
- Anhui Provincial Key Laboratory of Molecular Enzymology and Mechanism of Major Diseases, Key Laboratory of Biomedicine in Gene Diseases and Health of Anhui Higher Education Institutes, College of Life Sciences, Anhui Normal University, Wuhu 241000, China
| | - Qinqin Shen
- Anhui Provincial Key Laboratory of Molecular Enzymology and Mechanism of Major Diseases, Key Laboratory of Biomedicine in Gene Diseases and Health of Anhui Higher Education Institutes, College of Life Sciences, Anhui Normal University, Wuhu 241000, China
- School of Ecology and Environment, Anhui Normal University, Wuhu 241000, China
| | - Teng Song
- Anhui Provincial Key Laboratory of Molecular Enzymology and Mechanism of Major Diseases, Key Laboratory of Biomedicine in Gene Diseases and Health of Anhui Higher Education Institutes, College of Life Sciences, Anhui Normal University, Wuhu 241000, China
| | - Honglei Zhao
- Weifang Inspection and Testing Center, Weifang 261100, China
| | - Yong Zhang
- Anhui Provincial Key Laboratory of Molecular Enzymology and Mechanism of Major Diseases, Key Laboratory of Biomedicine in Gene Diseases and Health of Anhui Higher Education Institutes, College of Life Sciences, Anhui Normal University, Wuhu 241000, China
| | - Aiqing Ren
- Institute of Food Research, Hezhou University, Hezhou 542899, China
| | - Wenbin Yang
- School of Ecology and Environment, Anhui Normal University, Wuhu 241000, China
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Ren A, Cao Z, Tang X, Duan Z, Duan X, Meng X. Reduction of oil uptake in vacuum fried Pleurotus eryngii chips via ultrasound assisted pretreatment. Front Nutr 2022; 9:1037652. [DOI: 10.3389/fnut.2022.1037652] [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: 09/06/2022] [Accepted: 10/24/2022] [Indexed: 11/11/2022] Open
Abstract
The reduction of oil uptake in vacuum-fried Pleurotus eryngii chips by ultrasound assisted pretreatment was investigated regarding the pore structure changes. Pore structure of P. eryngii chips with four pretreatments, such as blanching, blanching + osmosis, blanching + ultrasound and blanching + ultrasound assisted osmosis was determined by mercury intrusion porosimetry (MIP) and scanning electron microscopy (SEM). In addition, the quality parameters of vacuum-fried P. eryngii chips such as hardness, rehydration ratio, reducing sugar, protein and oil content were also measured. The results showed that the oil absorption of vacuum fried P. eryngii chips was affected by the porous structure. The oil content of vacuum fried P. eryngii chips was significantly and positively correlated with the pores with diameters above 50, 5–50, and 0.5–5 μm in the samples both before and after vacuum frying, while negatively correlated with the pores with diameters below 0.5 μm. Ultrasound pretreatment changed the microporous structure of P. eryngii chips, effectively hindering the oil absorption of samples. In particular, ultrasound assisted osmosis pretreatment induced the formation of more micropores. It was concluded that blanching + ultrasound assisted osmosis pretreatment is a promising method to reduce oil absorption and improve the quality of vacuum fried foods.
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Li L, Ren X, Chen J, Cao W, Ren G, Bhandari B, Ren A, Duan X. Changes and relationships of viscoelastic and physical properties of Chinese yam during a novel multiphase microwave drying process. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113969] [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: 10/14/2022]
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Lin Q, Ren A, Liu R, Xing Y, Yu X, Jiang H. Flavor properties of Chinese noodles processed by dielectric drying. Front Nutr 2022; 9:1007997. [PMID: 36245479 PMCID: PMC9558107 DOI: 10.3389/fnut.2022.1007997] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 09/15/2022] [Indexed: 11/13/2022] Open
Abstract
Volatile organic compounds (VOCs) significantly impact food flavor. In this work, Electron nose (E-nose), head space solid phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS), and head space-gas chromatography-ion mobility spectrometry (HS-GC-IMS) techniques were applied to analyze different drying effects: microwave, hot air, and radio frequency on the aroma of Chinese noodles. E-nose analysis suggests that aromatic differences are mainly from broad range-methane. HS-SPME-GC-MS and HS-GC-IMS identified 47 and 26 VOCs in the fresh and dried noodles, respectively. The VOCs in the dried noodles were mainly aldehydes, alcohols, and esters. Drying significantly reduced the types of VOCs in Chinese dried noodles. Microwave dried noodles exhibited the strongest aroma after the shortest time of treatment, suggesting microwave drying may be the best drying method for noodles. Using aromatic analysis, this paper provides useful information for understanding the flavor of flour products and offers new ideas for drying noodles.
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Affiliation(s)
- Qian Lin
- College of Food Science and Engineering, Northwest A&F University, Yangling, China
| | - Aiqing Ren
- Institute of Food Research, Hezhou University, Guangxi, China
| | - Rui Liu
- Cereal Industrial Technology Academy, Hebei Jinshahe Flour and Noodle Group/Hebei Cereal Food Processing Technology Innovation Centre, Xingtai, China
| | - Yanan Xing
- Cereal Industrial Technology Academy, Hebei Jinshahe Flour and Noodle Group/Hebei Cereal Food Processing Technology Innovation Centre, Xingtai, China
| | - Xiuzhu Yu
- College of Food Science and Engineering, Northwest A&F University, Yangling, China
| | - Hao Jiang
- College of Food Science and Engineering, Northwest A&F University, Yangling, China
- Engineering Research Center of Grain and Oil Functionalized Processing, Universities of Shaanxi Province, Yangling, China
- *Correspondence: Hao Jiang, ;
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Zhao M, Cao W, Li L, Ren A, Ang Y, Chen J, Bhandari B, Wang Z, Ren X, Ren G, Duan X. Effects of different proteins and maltodextrin combinations as wall material on the characteristics of Cornus officinalis flavonoids microcapsules. Front Nutr 2022; 9:1007863. [PMID: 36185648 PMCID: PMC9515985 DOI: 10.3389/fnut.2022.1007863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2022] [Accepted: 08/23/2022] [Indexed: 11/13/2022] Open
Abstract
The flavonoids in Cornus officinalis (CO) have various pharmacological activities, however, the flavonoid instability limits its application in food and pharmaceutical industries. In this study, Cornus officinalis flavonoid (COF) microcapsules were prepared by using a combination of whey isolate protein (WPI), soy isolate protein (SPI), gelatin (GE), and maltodextrin (MD) as wall materials, respectively. Meanwhile, the encapsulation efficiency, solubility, color, particle size, thermal stability and microstructure as well as the antioxidant capacity of microcapsules were assessed. When the protein/MD ratio was 3:7, three kinds of combined wall materials realized high encapsulation efficiency (96.32–98.24%) and water solubility index (89.20–90.10%). Compared with other wall material combinations, the microcapsules with WPI-MD wall ratio at 3:7 had lower particle size (7.17 μm), lower moisture content (6.13%), higher encapsulation efficiency (98.24%), better water solubility index (90.1%), higher thermal stability (86.00°C), brightness L* (67.84) and higher 1,1-diphenyl-2-picrylhydrazyl (DPPH) scavenging capacity (6.98 mgVc/g), and better flowability. Results suggested that WPI and MD could be better wall materials applied in encapsulating COF.
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Affiliation(s)
- Mengyue Zhao
- Department of Food Sciences and Engineering, College of Food and Bioengineering, Henan University of Science and Technology, Luoyang, China
| | - Weiwei Cao
- Department of Food Sciences and Engineering, College of Food and Bioengineering, Henan University of Science and Technology, Luoyang, China
- *Correspondence: Weiwei Cao
| | - Linlin Li
- Department of Food Sciences and Engineering, College of Food and Bioengineering, Henan University of Science and Technology, Luoyang, China
| | - Aiqing Ren
- Department of Food Science, Institute of Food Research, Hezhou University, Hezhou, China
- Aiqing Ren
| | - Yuan Ang
- Department of Food Sciences and Engineering, College of Food and Bioengineering, Henan University of Science and Technology, Luoyang, China
| | - Junliang Chen
- Department of Food Sciences and Engineering, College of Food and Bioengineering, Henan University of Science and Technology, Luoyang, China
| | - Bhesh Bhandari
- Department of ARC Dairy Innovation Hub, School of Agriculture and Food Sciences, The University of Queensland, Brisbane, QLD, Australia
| | - Zhe Wang
- Department of Food Sciences and Engineering, College of Food and Bioengineering, Henan University of Science and Technology, Luoyang, China
| | - Xing Ren
- Department of Food Sciences and Engineering, College of Food and Bioengineering, Henan University of Science and Technology, Luoyang, China
| | - Guangyue Ren
- Department of Food Sciences and Engineering, College of Food and Bioengineering, Henan University of Science and Technology, Luoyang, China
| | - Xu Duan
- Department of Food Sciences and Engineering, College of Food and Bioengineering, Henan University of Science and Technology, Luoyang, China
- Xu Duan
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Zheng L, Ren A, Liu R, Xing Y, Yu X, Jiang H. Effect of sodium chloride solution on quality of 3D-printed samples molded using wheat starch gel. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2021.107197] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Cid MC, Unizony S, Pupim L, Fang F, Pirrello J, Ren A, Samant M, Zhou T, Paolini JF. OP0059 MAVRILIMUMAB (ANTI GM-CSF RECEPTOR Α MONOCLONAL ANTIBODY) REDUCES RISK OF FLARE AND INCREASES SUSTAINED REMISSION IN A PHASE 2 TRIAL OF PATIENTS WITH GIANT CELL ARTERITIS. Ann Rheum Dis 2021. [DOI: 10.1136/annrheumdis-2021-eular.1915] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Background:T helper (Th)1 and Th17 lymphocytes play a role in the pathogenesis of giant cell arteritis (GCA). Current treatments primarily target the Th17 axis, possibly leaving residual Th1 activity. Granulocyte macrophage colony stimulating factor (GM-CSF), a mediator of Th1 and Th17 cells, is a pathogenic factor in GCA.Objectives:To evaluate the efficacy and safety of the GM-CSF inhibitor mavrilimumab in patients with GCA.Methods:Randomized, double-blind, placebo-controlled phase 2 trial enrolling patients with active, biopsy- or imaging-proven new onset (N/O) or relapsing refractory (R/R) GCA. Active disease: GCA symptoms and erythrocyte sedimentation rate (ESR) (>30 mm/hr) and/or C-reactive protein (CRP) (≥1 mg/dL) elevation within 6 weeks from randomization. Corticosteroid-induced remission (resolution of GCA symptoms and CRP <1 mg/dL or ESR <20 mm/hr) was required by baseline. 3:2 randomization to mavrilimumab 150 mg or placebo subcutaneously every 2 weeks and protocol-defined 26-week prednisone taper starting at 20-60 mg/day.Primary efficacy endpoint: time to first adjudicated flare (ESR ≥30 mm/hr and/or CRP ≥1 mg/dL and GCA symptoms or new/worsening vasculitis on imaging) by Week 26 in all treated patients. Key secondary endpoint: sustained remission through Week 26. Safety up to Week 38 was assessed.Results:70 patients (35 N/O, 35 R/R) were enrolled (mavrilimumab [N=42] or placebo [N=28]). Mean (SD) age was 69.7 (7.48) years and 71.4% were female. Flare by Week 26 occurred in 8 (19%) and 13 (46.4%) patients receiving mavrilimumab and placebo, respectively (27.4 percentage points reduction). Median time to flare by Week 26 could not be estimated in the mavrilimumab group due to too few events (Not Estimable) and was 25.1 weeks [95% CI: (16.0, NE)] in the placebo group (HR [95% CI] 0.38 [0.15, 0.92]; p=0.0263) (Figure). Sustained remission at Week 26 occurred in 83.2% of patients receiving mavrilimumab and 49.9% of those receiving placebo (33.4 percentage points increase; p=0.0038). Results were consistent across disease type subgroups (HR for flare: N/O 0.29 [95% CI: 0.06, 1.31; nominal p= 0.0873]; R/R 0.43 [95% CI: 0.14, 1.30]; nominal p=0.1231), although not powered for significance (Table). Adverse events (AEs), mostly mild to moderate, were comparable between groups. There were 5 serious AEs (mavrilimumab 2 [4.8%], placebo 3 [10.7%]), none drug-related. No deaths or vision loss occurred. No adjudicated cases of pulmonary alveolar proteinosis were observed.Table 1.Efficacy at Week 26All Patients [1]SubgroupsN/OR/RMavrilimu-mab (N=42)Placebo (N=28)Mavrilimu-mab (N=24)Placebo (N=11)Mavrilimu-mab (N=18)Placebo (N=17)Patients with Flare, n (%)8 (19.0)13 (46.4)3 (12.5)4 (36.4)5 (27.8)9 (52.9)Time to Flare (weeks) [2]Median, 95% CINE (NE, NE)25.1 (16.0, NE)NE (NE, NE)NE (11.7, NE)NE (16.4, NE)22.6 (16.0, NE)HR (Mavrilimumab vs Placebo), 95% CI [3]0.38 (0.15, 0.92)0.29 (0.06, 1.31)0.43 (0.14, 1.30)P-value [4] [5]0.02630.08730.1231Sustained Remission (%), 95% CI [6]83.2 (67.9, 91.6)49.9 (29.6, 67.3)91.3 (69.3, 97.7)62.3 (27.7, 84.0)72.2 (45.6, 87.4)41.7 (17.4, 64.5)Difference in Proportions (95% CI) [7]33.3 (10.7, 55.8)28.9 (-2.7, 60.5)30.6 (-2.1, 63.2)P-value [5] [7]0.00380.07270.0668NE = Not estimable. [1] Total mITT population. Stratified by randomization strata. [2] Kaplan-Meier. [3] Cox proportional-hazards model; treatment as covariate. [4] Log-rank test. [5] N/O and R/R subgroups not powered for significance; nominal p values reported. [6] Kaplan-Meier Survival Estimates with standard error. [7] Two-sided p-value for the difference in sustained remission between 2 arms using normal approximation. Placebo arm is reference.Conclusion:Mavrilimumab was superior to placebo on the primary and secondary efficacy endpoints of time to flare and sustained remission at week 26 in patients with GCA. Mavrilimumab was well tolerated, and no new safety signals were observed.Disclosure of Interests:Maria C. Cid Speakers bureau: meeting attendance support from Roche and Kiniksa, Paid instructor for: educational from GSK and Vifor, Consultant of: consulting for Janssen, GSK, and Abbvie, Grant/research support from: research grant from Kiniksa, Sebastian Unizony Consultant of: consulting for Janssen and Kiniksa, Grant/research support from: research support from Genentech, Lara Pupim Shareholder of: Kiniksa Pharmaceuticals, Employee of: Kiniksa Pharmaceuticals, Fang Fang Shareholder of: Kiniksa Pharmaceuticals, Employee of: Kiniksa Pharmaceuticals, Joseph Pirrello Shareholder of: Kiniksa Pharmaceuticals, Employee of: Kiniksa Pharmaceuticals, Ai Ren Shareholder of: Kiniksa Pharmaceuticals, Employee of: Kiniksa Pharmaceuticals, Manoj Samant Shareholder of: Kiniksa Pharmaceuticals, Employee of: Kiniksa Pharmaceuticals, Teresa Zhou Shareholder of: Kiniksa Pharmaceuticals, Employee of: Kiniksa Pharmaceuticals, John F. Paolini Shareholder of: Kiniksa Pharmaceuticals, Employee of: Kiniksa Pharmaceuticals
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Xu B, Ren A, Chen J, Li H, Wei B, Wang J, Azam SR, Bhandari B, Zhou C, Ma H. Effect of multi-mode dual-frequency ultrasound irradiation on the degradation of waxy corn starch in a gelatinized state. Food Hydrocoll 2021. [DOI: 10.1016/j.foodhyd.2020.106440] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Wang L, Xiao Y, Tian T, Jin L, Lei Y, Finnell RH, Ren A. Corrigendum to "Digenic variants of planar cell polarity genes in human neural tube defect patients." Mol Genet Metab. 2018 May;124(1):94-100. doi:10.1016/j.ymgme.2018.03.005. Epub 2018 Mar 18. https://pubmed.ncbi.nlm.nih.gov/29573971/. Mol Genet Metab 2021; 132:211. [PMID: 33582009 DOI: 10.1016/j.ymgme.2021.01.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- L Wang
- Institute of Reproductive and Child Health, Ministry of Health Key Laboratory of Reproductive Health, Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China; Departments of Molecular and Cellular Biology and Medicine, Baylor College of Medicine, Houston, TX 77030, USA
| | - Y Xiao
- Institute of Reproductive and Child Health, Ministry of Health Key Laboratory of Reproductive Health, Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China; Departments of Molecular and Cellular Biology and Medicine, Baylor College of Medicine, Houston, TX 77030, USA
| | - T Tian
- Institute of Reproductive and Child Health, Ministry of Health Key Laboratory of Reproductive Health, Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China; Departments of Molecular and Cellular Biology and Medicine, Baylor College of Medicine, Houston, TX 77030, USA
| | - L Jin
- Institute of Reproductive and Child Health, Ministry of Health Key Laboratory of Reproductive Health, Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China
| | - Y Lei
- Departments of Molecular and Cellular Biology and Medicine, Baylor College of Medicine, Houston, TX 77030, USA.
| | - R H Finnell
- Institute of Reproductive and Child Health, Ministry of Health Key Laboratory of Reproductive Health, Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China; Departments of Molecular and Cellular Biology and Medicine, Baylor College of Medicine, Houston, TX 77030, USA
| | - A Ren
- Institute of Reproductive and Child Health, Ministry of Health Key Laboratory of Reproductive Health, Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China.
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Shah K, Ren A, Kuwahara J, Kloster M, Mikolajczyk A, Bui J, Lipnik A, Niemeyer M, Ray C, Gaba R. 3:18 PM Abstract No. 249 Combined transjugular intrahepatic portosystemic shunt plus variceal obliteration versus transjugular intrahepatic portosystemic shunt alone for management of gastric varices: comparative single-center clinical outcomes. J Vasc Interv Radiol 2020. [DOI: 10.1016/j.jvir.2019.12.294] [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: 10/25/2022] Open
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Benzaghou F, Ren A, del Pilar Schneider M, Dinet J, Pham E. Real world practice and outcomes for metastatic renal cell carcinoma: What can we learn from real world data analysis in the US? Ann Oncol 2018. [DOI: 10.1093/annonc/mdy435.001] [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: 11/14/2022] Open
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Ren A, Dai Q. P3782Nicotine promotes atherosclerosis development in apolipoprotein E-deficient mice through alpha 1 nicotinic acetylcholine receptor on RAW264.7 and MOVAS cells. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy563.p3782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- A Ren
- Shanghai Jiao Tong University Affiliated First People's Hospital, Department of Cardiology, Shanghai, China People's Republic of
| | - Q Dai
- Shanghai Jiao Tong University Affiliated First People's Hospital, Department of Cardiology, Shanghai, China People's Republic of
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Zhao P, Ren A, Dong P, Sheng Y, Li D. Antimicrobial Peptaibols, Trichokonins, Inhibit Mycelial Growth and Sporulation and Induce Cell Apoptosis in the Pathogenic Fungus Botrytis cinerea. APPL BIOCHEM MICRO+ 2018. [DOI: 10.1134/s0003683818040154] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Ren A, Wang Q, Fang Z, Gao M, Wang H, Zhang J, Xu W, Yue W, Yin L, Liu Z, Li X, Ding B. Pharmacokinetic study of isatin in dog plasma by liquid chromatography tandem mass spectrometry. Panminerva Med 2015; 57:177-182. [PMID: 26018409] [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: 06/04/2023]
Abstract
AIM A sensitive and selective method was developed and validated to study the pharmacokinetics of isatin. METHODS The blood samples were pretreated by protein precipitation method using methanol. Quetiapine was used as an internal standard. After pretreatment, the samples were assayed by LC/MS/MS method and the pharmacokinetic parameters were calculated by WinNonlin 5.2 using non-compartment model. The separation was performed on a Venusil XBP PH column (5 µm, 2.0×100 mm) with an isocratic mobile phase consisted of methanol-water (containing 50 mM ammonium formate) (65:35, v/v) at a flow rate of 0.3 mL/min. The Agilent G6410B triple quadrupole LC/MS system was operated under the multiple reactions monitoring mode (MRM) using the electrospray ionization technique in positive mode. RESULTS The lower limits of quantification (LLOQ) of the analyte of the method was 10 ng/mL. The method was linear with correlation coefficient >0.995. The intraday and interday accuracy and precision of the assay were acceptable. CONCLUSION This method has been applied successfully to a pharmacokinetic study involving the oral and intravenous administration of isatin to beagle dogs.
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Affiliation(s)
- A Ren
- Shandong Provincial Hospital affiliated to Shandong University, Jinan, China -
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Ren A, Qiu Y, Cui H, Fu G. Tigecycline exerts an antitumoral effect in oral squamous cell carcinoma. Oral Dis 2015; 21:558-64. [PMID: 25581076 DOI: 10.1111/odi.12311] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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: 07/10/2014] [Revised: 11/30/2014] [Accepted: 12/12/2014] [Indexed: 12/12/2022]
Abstract
OBJECTIVE To explore whether antibacterial drug tigecycline could exert an antitumoral effect in oral squamous cell carcinoma (OSCC). MATERIALS AND METHODS Two OSCC cell lines Tca8113 and KB were used in this study. To investigate the cytostatic effects of tigecycline in OSCC, cell growth was tested by trypan blue staining, MTT assay, and Brdu immunofluorescence staining. Then, the apoptosis proportion was measured by FITC Annexin-V and PI labeling, and cell cycle was determined by PI staining. The expression of caspase 3 (CASP3) and cell cycle regulatory protein was detected by Western blot assay. Finally, the clonogenesis and tumorigenesis capacity were analyzed by soft agar growth and xenograft model. RESULTS Here, we showed that tigecycline significantly inhibited cell growth and proliferation in OSCC cell lines Tca8113 and KB. It did not induce cell apoptosis but led to an increase of cells in G0/G1 phase with down-regulation of cyclin E2 (CCNE2) and cyclin-dependent kinase4 (CDK4) protein expression. We also showed that tigecycline inhibited colony formation in soft agar and reduced tumor growth in a xenograft model. CONCLUSION Our results suggested that tigecycline might be used as a novel candidate agent for the treatment of OSCC.
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Affiliation(s)
- A Ren
- Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing Medical University, Chongqing, China.,Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing, China
| | - Y Qiu
- Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing Medical University, Chongqing, China.,Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing, China
| | - H Cui
- State Key Laboratory of Silkworm Genome Biology, Southwest University, Chongqing, China
| | - G Fu
- Chongqing Key Laboratory for Oral Diseases and Biomedical Sciences, Chongqing Medical University, Chongqing, China.,Affiliated Hospital of Stomatology, Chongqing Medical University, Chongqing, China
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Xiao CC, Ren A, Yang J, Ye SD, Xing XN, Li SM, Chen C, Chen RP. Effects of pioglitazone and glipizide on platelet function in patients with type 2 diabetes. Eur Rev Med Pharmacol Sci 2015; 19:963-970. [PMID: 25855920] [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] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE Platelet hyper-reactivity is one of the most important causes of accelerated atherosclerosis and increased risk of thrombotic vascular events associated with type 2 diabetes mellitus (T2DM). This study aimed to investigate the effects of different add-on anti-diabetic therapies on platelet function in T2DM patients. PATIENTS AND METHODS A three-group parallel study was conducted in 120 patients with T2DM (HbA1c > 7%) undergoing treatment with metformin. Patients were randomly assigned to receive add-on therapy with glipizide or pioglitazone. Markers of PF (platelet PAC-1 binding, p-selectin expression and adenosine diphosphate-induced platelet aggregation) were measured at weeks 0, 4 and 24. Primary outcome was effects of pioglitazone and glipizide on platelet aggregation. Secondary outcome was the related influencing factors of platelet aggregation. RESULTS There were no significant differences in baseline characteristics between glipizide and pioglitazone groups. After 24 weeks, fasting blood glucose (p < 0.01) and HbA1c (p < 0.01) were higher in pioglitazone group than those in glipizide group. Fasting insulin (p < 0.01) and HOMA-IR (p < 0.01) were lower in pioglitazone group than that in glipizide group. Markers of platelet function were significantly decreased in both groups at 24 weeks (PAC-1: pioglitazone: -63.3%; glipizide: -45.9%; p-selectin: pioglitazone: -73.9%; glipizide: -54.9%; platelet aggregation: pioglitazone: -24.1%; glipizide: -13.4%; all p < 0.01 vs. baseline), but the decrease in platelet function was more significant in pioglitazone group (p < 0.05). Multiple linear regression analyses showed that platelet aggregation was independently associated with treatment groups (p < 0.001), Triglyceride (p = 0.009) and HDL-C (p = 0.015). CONCLUSIONS Add-on therapy with pioglitazone may be more effective than glipizide for inhibiting platelet activation in T2DM.
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Affiliation(s)
- C-C Xiao
- Department of Endocrinology, Anhui Provincial Hospital Affiliated to Anhui Medical University, Hefei, Anhui Province, China.
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Hu LB, Huang ZG, Wei HY, Wang W, Ren A, Xu YY. Osteonecrosis of the femoral head: using CT, MRI and gross specimen to characterize the location, shape and size of the lesion. Br J Radiol 2014; 88:20140508. [PMID: 25496444 DOI: 10.1259/bjr.20140508] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE To investigate the accuracy of using CT and MRI to characterize lesions of osteonecrosis of the femoral head (ONFH). METHODS Coronal CT and MRI scans were performed on 30 femoral head specimens collected from 23 patients who had undertaken hip arthroplasty owing to ONFH. The results were compared with findings from coronal sectional gross specimens. Two radiologists independently measured the volume of necrotic lesions from CT and MR images using computer software, and the results were averaged. The volume of specimens' necrotic lesion was measured using the water displacement method. RESULTS There was a high degree of consistency between CT, MRI and the coronal sectional gross specimen on the location, shape and spatial structure of lesions. Differences of the lesion volume measured from CT and MR images were not statistically significant between two radiologists. The necrotic lesion volumes measured from CT and MR images and gross specimens were 22.07 ±5.35, 22.21 ± 5.15 and 21.12 ±4.96 cm(3), respectively, and the differences were not statistically significant (F = 0.396; p = 0.674). CONCLUSION For patients with ONFH in Association Research Circulation Osseous stage III or above, CT and MRI can accurately display the characterization of lesion. ADVANCES IN KNOWLEDGE The size and location of necrotic lesions are major factors associated with femoral head collapse. CT is superior to MRI in identifying subchondral fracture. CT can help diagnose and predict the prognosis of ONFH.
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Affiliation(s)
- L B Hu
- 1 Department of Radiology, China-Japan Friendship Hospital, Beijing, China
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Li H, Ye R, Pei L, Ren A, Zheng X, Liu J. Caesarean delivery, caesarean delivery on maternal request and childhood overweight: a Chinese birth cohort study of 181 380 children. Pediatr Obes 2014; 9:10-6. [PMID: 23512941 DOI: 10.1111/j.2047-6310.2013.00151.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2012] [Revised: 01/26/2013] [Accepted: 02/02/2013] [Indexed: 11/28/2022]
Abstract
UNLABELLED What is already known about this subject Both rates of caesarean section and childhood overweight have been steadily increasing over the past decade in many parts of the world. Caesarean delivery on maternal request contributes remarkably to the rising trend of caesarean births. A few small-scale studies suggest that caesarean section may be associated with later overweight and obesity, whereas little is known about the impact of caesarean delivery on maternal request. What this study adds Caesarean section is associated with an increased risk of childhood overweight. Children born by caesarean delivery on maternal request are also more likely to be overweight. The strength of the caesarean-overweight association is modest. OBJECTIVES To assess the impact of caesarean delivery including non-medically indicated maternal request caesarean delivery on childhood overweight. METHODS We conducted a prospective investigation of a Chinese birth cohort involving 181 380 children, who were born during 1993-1996 to mothers registered in a perinatal care surveillance system and whose weight and height were measured in 2000. Information on delivery mode and covariates was obtained from the surveillance system. Overweight was defined according to the International Obesity Task Force body mass index (BMI) cutoffs. Multivariable logistic regression was used to estimate adjusted odds ratios. Stratified analyses were done to test whether the association between caesarean section and overweight persisted across subgroups. RESULTS The adjusted odds ratio of overweight for children born by caesarean compared with vaginal delivery was 1.13 [95% confidence interval {CI}: 1.08, 1.18]. The association persisted in subgroups stratified by gender, maternal education, maternal BMI, weight gain during pregnancy and child birthweight (all P values for interaction test ≥0.30). The adjusted odds ratio of overweight for children born by non-medically indicated caesarean delivery compared with vaginal delivery was 1.18 (95% CI: 1.00, 1.41). CONCLUSION Caesarean delivery including non-medically indicated maternal request caesarean delivery compared with vaginal delivery modestly increases childhood overweight risk.
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Affiliation(s)
- H Li
- Institute of Reproductive and Child Health, Ministry of Health Key Laboratory of Reproductive Health, School of Public Health, Peking University Health Science Center, Beijing, China; Department of Epidemiology and Biostatistics, School of Public Health, Peking University Health Science Center, Beijing, China
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Yin L, Ren A, Wei M, Wu L, Zhou Y, Li X, Gao Y. Neotyphodium coenophialum-infected tall fescue and its potential application in the phytoremediation of saline soils. Int J Phytoremediation 2014; 16:235-246. [PMID: 24912220 DOI: 10.1080/15226514.2013.773275] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The growth response of endophyte-infected (EI) and endophyte-free (EF) tall fescue to salt stress was investigated under two growing systems (hydroponic and soil in pots). The hydroponic experiment showed that endophyte infection significantly increased tiller and leaf number, which led to an increase in the total biomass of the host grass. Endophyte infection enhanced Na accumulation in the host grass and improved Na transport from the roots to the shoots. With a 15 g l(-1) NaCl treatment, the phytoextraction efficiency of EI tall fescue was 2.34-fold higher than EF plants. When the plants were grown in saline soils, endophyte infection also significantly increased tiller number, shoot height and the total biomass of the host grass. Although EI tall fescue cannot accumulate Na to a level high enough for it to be termed a halophyte, the increased biomass production and stress tolerance suggested that endophyte/plant associations had the potential to be a model for endophyte-assisted phytoextraction in saline soils.
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Khuu T, Cadeiras M, Wisniewski N, Allareddy M, Baas A, Cheng R, Cruz D, Depasquale E, Hickey A, Kubak B, Nsair A, Rajalingam R, Khuu W, Ren A, Holt C, Fishbein M, Kwon M, Ardehali A, Shemin R, Reed E, Deng M. Reduced HLA Class II Antibody Response to Proteasome Inhibition. J Heart Lung Transplant 2013. [DOI: 10.1016/j.healun.2013.01.239] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Li HT, Ye R, Achenbach TM, Ren A, Pei L, Zheng X, Liu JM. Caesarean delivery on maternal request and childhood psychopathology: a retrospective cohort study in China. BJOG 2010; 118:42-8. [PMID: 21050366 DOI: 10.1111/j.1471-0528.2010.02762.x] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To prospectively examine the association between mode of delivery and childhood psychopathology. DESIGN Retrospective cohort study. SETTING Eighteen counties and three cities in China. POPULATION A total of 4190 preschool children whose mothers were registered in a perinatal surveillance programme were assessed with the Child Behaviour Checklist (CBCL), an instrument to assess child emotional (internalising) and behavioural (externalising) problems. METHODS Differences in CBCL problem scores were analysed both quantitatively and categorically among children born by caesarean delivery on maternal request (CDMR), assisted vaginal delivery (AVD), and spontaneous vaginal delivery (SVD). MAIN OUTCOME MEASURES The CBCL total, externalising, and internalising scores. RESULTS There were significant differences in the mean scores of total (20.9, 23.0, and 25.0), externalising (7.6, 8.4, and 9.1), and internalising (4.7, 5.2, and 5.6) problems among children born by CDMR, SVD, and AVD, after adjusting for potential confounding factors (P = 0.007, 0.014, and 0.031). Children born by AVD were more likely than those born by SVD to have total (OR 1.43; 95% CI 1.10-1.86), externalising (OR 1.46; 95% CI 1.11-1.92), and internalising (OR 1.41; 95% CI 1.08-1.84) scores in the highest quartile, whereas children born by CDMR were less likely to have externalising scores in the highest quartile (OR 0.64; 95% CI 0.42-0.97). Furthermore, there were significant increasing linear trends on all problem scores, and in the odds of being in the highest quartile, from children born by CDMR to those born by SVD and AVD. CONCLUSION The likelihood of childhood psychopathological problems may be the lowest in children born by CDMR, followed by those born by SVD, whereas the highest probability was observed in those born by AVD.
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Affiliation(s)
- H-T Li
- Department of Epidemiology, Institute of Reproductive and Child Health, Peking University Health Science Center, Beijing, China
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Matuoka T, Hara E, Ren A, Hirooki Y, Kaneko S. P4-4 The probability effect on the discriminative sensitivity inside temporal window integration. Clin Neurophysiol 2010. [DOI: 10.1016/s1388-2457(10)60499-3] [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: 11/24/2022]
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Ye SD, Zheng M, Zhao LL, Qian Y, Yao XM, Ren A, Li SM, Jing CY. Intensive insulin therapy decreases urinary MCP-1 and ICAM-1 excretions in incipient diabetic nephropathy. Eur J Clin Invest 2009; 39:980-5. [PMID: 19663918 DOI: 10.1111/j.1365-2362.2009.02203.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND Nowadays, intensive insulin treatment has been widely used in type 2 diabetics who have poor control of blood glucose, to reduce the risk of chronic complications of diabetes. Recently, some scholars have paid more attention to the pivotal role of inflammation involved in type 2 diabetes and its complications. Monocyte chemoattractant protein-1 (MCP-1) and intercellular adhesion molecule-1 (ICAM-1), which are two important inflammatory chemokines, have been documented to participate in the onset and development of type 2 diabetes and its complications, such as diabetic nephropathy (DN). DESIGN In the current study, we recruited 30 type 2 diabetics with microalbuminuria to be treated with multiple insulin injections daily for 2 weeks. Random spot urine samples (corrected for creatinine-Cr) were collected for the examination of urinary MCP-1, ICAM-1 and albumin (Alb) levels before and after the intensive insulin therapy. Changes in their levels were observed to test the hypothesis that type 2 diabetes with microalbuminuria is associated with elevated urinary concentrations of MCP-1 and ICAM-1, and intensive insulin therapy can result in a decline of Alb by reducing the inflammatory reaction. RESULTS The urinary MCP-1/Cr and urinary ICAM-1/Cr ratios in type 2 diabetic patients with microalbuminuria were much higher than those in normal controls, and intensive insulin treatment could decrease significantly the urinary MCP-1/Cr, ICAM-1/Cr and Alb/Cr ratios in type 2 diabetics with microalbuminuria. CONCLUSION Intensive insulin treatment may protect against renal injury in early DN by reducing the urinary MCP-1 and ICAM-1 excretions.
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Affiliation(s)
- S D Ye
- Anhui Provincial Hospital Affiliated to Anhui Medical University, Hefei 230001, China.
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Ren A, Wang J, Ye RW, Li S, Liu JM, Li Z. Low first-trimester hemoglobin and low birth weight, preterm birth and small for gestational age newborns. Int J Gynaecol Obstet 2007; 98:124-8. [PMID: 17585914 DOI: 10.1016/j.ijgo.2007.05.011] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2006] [Revised: 05/11/2007] [Accepted: 05/16/2007] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To examine the relationship between first-trimester hemoglobin (Hb) concentration and risk of low birth weight (LBW), preterm birth and small for gestational age (SGA). METHODS Data were obtained from a population-based prenatal care program in China. A total of 88,149 women who delivered during 1995-2000 and had their Hb measured in the first trimester were selected as study subjects. RESULTS The prevalence of anemia (Hb<110 g/L) was 22.1% in the first trimester. The risk of LBW, preterm birth and SGA was increased steadily with the decrease of first-trimester Hb concentration. After controlling for confounding factors, women with Hb 80-99 g/L had significantly higher risk for LBW (OR=1.44, 95% CI 1.17-1.78), preterm birth (OR=1.34, 95% CI 1.16-1.55) and SGA (OR=1.13, 95% CI 0.98-1.31) than women with Hb 100-119 g/L. No elevated risk was noted for women with Hb> or =120 g/L. CONCLUSION Low first-trimester Hb concentration increases the risk of LBW, preterm birth and SGA.
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Affiliation(s)
- A Ren
- Institute of Reproductive and Child Health, Peking University Health Science Center, 38 Xueyuan Road, Haidian District, Beijing 100083, China.
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Ren A, Yu S, Han J, Chang P, Chen C, Chen J, Wang X. A comparative study of Pb2+ sorption onto MX-80 bentonite, LA bentonite, γ-Al2O3 and SiO2. J Radioanal Nucl Chem 2007. [DOI: 10.1007/s10967-006-6762-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Wang X, Xu D, Chen L, Tan X, Zhou X, Ren A, Chen C. Sorption and complexation of Eu(III) on alumina: Effects of pH, ionic strength, humic acid and chelating resin on kinetic dissociation study. Appl Radiat Isot 2006; 64:414-21. [PMID: 16290942 DOI: 10.1016/j.apradiso.2005.08.010] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2005] [Revised: 07/15/2005] [Accepted: 08/19/2005] [Indexed: 11/26/2022]
Abstract
The effects of pH (pH=2-12), ionic strength (0.01-2 mol/l NaNO(3)) and humic acid on the sorption and complexation of Eu(III) on alumina were investigated by using batch techniques. The experiments were carried out at room temperature and under ambient conditions. The results indicate that the sorption of Eu(III) on alumina is strongly influenced by humic acid. The sorption of Eu(III) on alumina is significantly dependent on pH values and independent of ionic strength. The sorption of Eu(III) on alumina may be attributed to surface complexation. The species of Eu(III) on HA-alumina colloids is dominated by both HA and alumina, and the addition sequences of HA or Eu(III) to the ternary system do not influence the sorption of Eu(III) to HA-coated alumina. Kinetic dissociation of Eu(III) from bare and HA-coated alumina was also studied by using the chelating resin. The result was discussed by a pseudo-first-order kinetics model.
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Affiliation(s)
- X Wang
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O.Box 1126, Hefei, Anhui 230031, PR China.
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Zhang ML, Zhang ML, Zhang ML, Ren A, Ren A, Ren A, Shao D, Shao D, Shao D, Wang X, Wang X, Wang X. Effect of fulvic acid and ionic strength on the sorption of radiostrontium on Chinese calcareous soil and its solid components. J Radioanal Nucl Chem 2006. [DOI: 10.1007/s10967-006-0119-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Wang X, Chen C, Yu S, Zhou X, Xu D, Ren A. Effect of pH and Fulvic Acid on the Sorption and Diffusion of Europium Ions in Compacted Bentonite as Studied by the Capillary Method. ADSORPT SCI TECHNOL 2005. [DOI: 10.1260/026361705777642034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Affiliation(s)
- X. Wang
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, Anhui, 230031, P. R. China
| | - C. Chen
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, Anhui, 230031, P. R. China
| | - S. Yu
- College of Chemical Engineering, Hefei University of Technology, 230009, Hefei, P. R. China
| | - X. Zhou
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, Anhui, 230031, P. R. China
| | - D. Xu
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, Anhui, 230031, P. R. China
| | - A. Ren
- Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei, Anhui, 230031, P. R. China
- College of Chemical Engineering, Hefei University of Technology, 230009, Hefei, P. R. China
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Ren A, Ma J, Feng F. [Safety and immunogenicity of a new inactivated hepatitis A vaccine]. Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi 2001; 15:357-9. [PMID: 11986726] [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] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
BACKGROUND To evaluate the safety and immunogenicity of a new inactivated hepatitis A virus (HAV) vaccine. METHODS In a randomized controlled trail thirty-one HAV-seronegative adults were enrolled and randomly assigned to either study group or control group. Subjects in the study group were given 1000 units of the new inactivated HAV vaccine, with a booster at 3 months. Subjects in the control group were given 720 ELISA units Havrix, produced by SmithKline Beecham Biologicals, with a subsequent dose at 3 months. Local and systematic reactions and serum response to the vaccines were compared between the two groups. RESULTS Mild local reactions were noted in one subject from the study group and two from the control group after primary vaccination. Mild systematic reactions were reported in two subjects from each group after primary vaccination and in one subject from the study group after booster vaccination. Seroconversion rates were 94%, 100%, and 100% in the study group at 1, 3, and 4 (1 month after booster) month, respectively. The corresponding figures were 73%, 80% and 100% in the control group. Geometric mean antibody titers were 139.2 mIU/ml, 137.7 mIU/ml, and 1 066.7 mIU/ml at 1, 3, and 4 months,respectively, in the study group,and 104.3 mIU/ml, 111.3 mIU/ml, and 760.7 mIU/ml in the control group. CONCLUSIONS The new inactivated hepatitis A vaccine was safe and highly immunogenic.
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Affiliation(s)
- A Ren
- Institute of Reproductive and Child Health,Peking University,Beijing 100083,China
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Takahashi K, Washio M, Ren A, Tokui N, Aw TC, Wong O. An international comparison of the involvement of epidemiology in the most frequently cited publications in the field of clinical medicine. J Epidemiol 2001; 11:41-5. [PMID: 11253909 DOI: 10.2188/jea.11.41] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [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: 11/18/2022] Open
Abstract
The objectivity, validity and credibility of research in clinical medicine can be enhanced by the appropriate involvement of epidemiology. However, the overall contribution of epidemiology to clinical research, either as a methodology or as a resource for research, has been poorly quantified. We therefore assessed the involvement of epidemiology in influential publications in the field of clinical medicine, and made an international comparison on a quantitative basis. The 500 most frequently cited papers published during 1981-96 in the field of clinical medicine in the US, the UK, and Japan were compared in terms of epidemiological involvement using predetermined criteria. The three criteria were based on the indexing of relevant MeSH keywords, publication types, or the departmental affiliations of the authors. For all three criteria, the proportion of clinical papers with epidemiological involvement was the highest in the US, followed by the UK, whereas it was the lowest in Japan. The difference was almost four-fold between the US and Japan. There was also an increasing trend of epidemiological involvement in publications of clinical medicine over the years, which was more apparent in the US than in either the UK or Japan. These findings may reflect inter-country differences in resources as well as in the stance towards evidence-based health sciences.
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Affiliation(s)
- K Takahashi
- Department of Environmental Epidemiology, University of Occupational and Environmental Health, Kitakyushu, Japan
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Qi W, Ren A, Zhang S. [Dynamic changes of serum pro-inflammatory cytokines and anti-inflammatory cytokines in patients with acute infection and the effect of Chinese herbal medicine intervention]. Zhongguo Zhong Xi Yi Jie He Za Zhi 2000; 20:824-7. [PMID: 11938827] [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] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
OBJECTIVE To study the dynamic changes of serum pro-inflammatory cytokines and anti-inflammatory cytokines in patients with acute infection and to explore the effect of 912 compound, a Chinese herbal preparation for intervention. METHODS Forty patients with acute infection were randomly divided into 2 groups, 20 in the 912 group and 20 in the control group, and the levels of plasma endotoxin (lipopolysaccharide, LPS), serum pro-inflammatory cytokines, including tumor necrosis factor alpha (TNF alpha) and interleukin-6 (IL-6) and anti-inflammatory cytokines, including soluble TNF-RI, IL-4 and IL-10 were measured before and after treatment by using limulus reagent stroma azo-colored quantitative method and enzyme-linked immunosorbent assay (ELISA). RESULTS The level of LPS increased at the early stage of acute infection, the levels of pro- and anti-inflammatory cytokines were all elevated in various degrees, particularly obvious in IL-6, sTNF-RI, IL-4 and IL-10 and the elevations of the two were basically parallel. The TNF alpha, IL-6 and sTNF-RI were positively related with APACHE III scoring. The levels of LPS and inflammatory cytokines reduced to a different extent in accord with the improvement of condition after treatment, the levels of LPS, TNF alpha, IL-6 and IL-10 lowered more significantly in the 912 group than those in the control group (P < 0.05). CONCLUSIONS LPS, pro-inflammatory and anti-inflammatory cytokines play important roles in the acute infection process, they were important indexes for evaluating severity of infectious diseases. The Chinese herbal preparation 912 compound could reduce the blood levels of LPS, TNF alpha, IL-6, IL-10 and prevent the decrease of sTNF-RI so as to promote the recovery of patients.
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Affiliation(s)
- W Qi
- Beijing Friendship Hospital, Beijing (100050)
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Chen D, Ren A, Hang Z. [The relationship between arteriolar pathological changes and brain hemorrhage in primary hypertension cases]. Hua Xi Yi Ke Da Xue Xue Bao 2000; 31:383-6. [PMID: 12545841] [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] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
This study was intended to elucidate the relationship between arteriolar pathological changes and encephalorrhagia in the cases of primary hypertension. Gross anatomy and histology of brain were observed in autopsy of 45 cases of primary hypertension. Forty cases of arteriolar hyalinization including 26 cases of brain hemorrhage were found in those 45 cases of primary hypertension. The hyalinized arterioles were divided to two types. One is characterized by the narrow lumen of terminal arterioles, the other by the dilatant lumen of proximal arterioles. Hemorrhage always occurred in the latter type. Besides these changes, 3 cases of acute necrosis and 5 cases of atherosclerosis in arterioles were related to hemorrhage. These data suggest that brain hemorrhage of primary hypertension mainly occur in dilated and hyalinized arterioles, and some cases are probably related to acute necrosis or atheroscleromatous atrerioles.
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Affiliation(s)
- D Chen
- Department of Pathology and Neurology, First Affiliated Hospital, WCUMS, Chengdu 610041
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Ren A, Ju J. [Studies of volatile oils from the flowers of Chrysanthemum nankingense and Chrysanthemum indicum]. Zhong Yao Cai 1999; 22:511-2. [PMID: 12571912] [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] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
Chemical constituents of volatile oils from the flowers of Chrysanthemum nankingense and C. indicum were studied by GC-MS. 59, 30 components were identified respectively.
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Affiliation(s)
- A Ren
- Jiangsu Provincial Institute of Traditional Chinese Medicine, Nanjing 210028
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Robinson B, Dalton L, Harper A, Ren A, Wang F, Zhang C, Todorova G, Lee M, Aniszfeld R, Garner S, Chen A, Steier W, Houbrecht S, Persoons A, Ledoux I, Zyss J, Jen A. The molecular and supramolecular engineering of polymeric electro-optic materials. Chem Phys 1999. [DOI: 10.1016/s0301-0104(99)00079-8] [Citation(s) in RCA: 216] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Chen D, Ren A, Hang Z. [Pathological morphology of arterioles and main visceal organs in primary hypertension--an analysis of 45 autopsies]. Hua Xi Yi Ke Da Xue Xue Bao 1999; 30:188-91. [PMID: 12212056] [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] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
Abstract
The autopsy materials of 45 cases of primary hypertension were studied retrospectively. The arteriolar lesions were reviewed. The arterioles < 100 microns in diameter were defined as distal arterioles; those > or = 100 microns and < 300 microns in diameter were proximal arterioles. The lesions of arteriolar wall were categorized as plasma infiltration and hyaline degeneration, and according to seriousness, the latter was divided into three degrees: I, II and III. The results revealed that (1) the arteriolar lesions in different areas of the body were at different stages of seriousness; (2) the changes in the distal arterioles were earlier than those in the proximal ones; in brain, the proximal arterioles dilated first, and then occurred the hyline degeneration; (3) hyaline degeneration took place early in the abdominal organs such as kidney, liver and pancreas, but relatively late in brain; (4) different parts of an organ were at different stages of seriousness; and (5) the lesions in different organs led to different consequences. The pathogenesis of arteriolar sclerosis in primary hypertension was also discussed.
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Affiliation(s)
- D Chen
- Department of Pathology and Neuology, First Affiliated Hospital, WCUMS, Chengdu 610041
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Tian Y, Chang F, Ren A. [Clinical observation on treatment of bile regurgitational gastritis with danwei capsule]. Zhongguo Zhong Xi Yi Jie He Za Zhi 1999; 19:148-51. [PMID: 11783281] [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] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To evaluate the therpeutic effect of Danwei capsule in treating bile regurgitational gastritis. METHODS One hundred and thirty-four patients with bile regurgitational gastritis were divided into two groups. Danwei capsule was used in therapeutic group and Motilium was used in control group. RESULTS The total effective rate in therapeutic group was 92.59%, and 71.70% in control group (P < 0.01). The improvement in symptoms, physical findings and bile regurgitation in therapeutic group was better than that of control. CONCLUSION Curative effect of Danwei capsule was better than that of Motilium, which should be used widely.
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Affiliation(s)
- Y Tian
- Jiangsu Provincial Academy of Traditional Chinese Medicine, Nanjing (210028)
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40
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Dalton L, Harper A, Ren A, Wang F, Todorova G, Chen J, Zhang C, Lee M. Polymeric Electro-optic Modulators: From Chromophore Design to Integration with Semiconductor Very Large Scale Integration Electronics and Silica Fiber Optics. Ind Eng Chem Res 1998. [DOI: 10.1021/ie9705970] [Citation(s) in RCA: 163] [Impact Index Per Article: 6.3] [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)
- L. Dalton
- Loker Hydrocarbon Research Institute, University of Southern California, Los Angeles, California 90089-1661
| | - A. Harper
- Loker Hydrocarbon Research Institute, University of Southern California, Los Angeles, California 90089-1661
| | - A. Ren
- Loker Hydrocarbon Research Institute, University of Southern California, Los Angeles, California 90089-1661
| | - F. Wang
- Loker Hydrocarbon Research Institute, University of Southern California, Los Angeles, California 90089-1661
| | - G. Todorova
- Loker Hydrocarbon Research Institute, University of Southern California, Los Angeles, California 90089-1661
| | - J. Chen
- Loker Hydrocarbon Research Institute, University of Southern California, Los Angeles, California 90089-1661
| | - C. Zhang
- Loker Hydrocarbon Research Institute, University of Southern California, Los Angeles, California 90089-1661
| | - M. Lee
- Loker Hydrocarbon Research Institute, University of Southern California, Los Angeles, California 90089-1661
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Hang Z, Chen D, Ren A. [Pathological analysis of 180 cases of cerebrovascular disorder in autopsy]. ZHONGHUA YI XUE ZA ZHI 1998; 78:213-5. [PMID: 10923534] [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] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
OBJECTIVE To evaluate the ratio of each kind of causes in 180 cases of cerebrovascular disorder(CVD) in autopsy. RESULTS In 180 cases of CVD in autopsy: (1)125 (69%) belong to brain hemorrhage including hypertension 36 cases(20%), vascular malformation 28 cases(16%), hemopoitic diseases and blood coagulation disturbances 23 cases(13%), congenital aneurysm and brain tumor 9 cases(5%) each separately. (2) 55 cases (31%) are due to brain infarction, main of them are caused by embolism 29 cases (16%) and thrombosis 17 cases(10%). Thrombosis related to atherosclerosis has 5 cases(3%). CONCLUSION In CVD in autopsy, brain hemorrhage is more than infarction, the ratio of them is 2.3:1. More than 50% of cases is due to hypertension and vascular malformation. In infarction, embolism is more than thrombosis, the ratio of them is 1.7:1. Vascular malformation is more than congenital aneurysm, the ratio of them is 3:1.
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Affiliation(s)
- Z Hang
- West China University of Medical Sciences, Chengdu
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Takahashi K, Sekikawa A, LaPorte RE, Satoh T, Pan G, Ren A, Okubo T, Yoshimura T. Occupational lung diseases and global occupational health on the Net. Occup Med (Lond) 1998; 48:3-6. [PMID: 9604465 DOI: 10.1093/occmed/48.1.3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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: 11/13/2022] Open
Abstract
Occupational lung disease is a major area of concern in occupational health, exhibiting a diverse panorama across countries. While pneumoconiosis is deemed to be the most common occupational disease in many developing countries, emphasis is shifting towards asbestos-related lung diseases and occupational asthma in industrialized countries. Following the Occupational Health for All strategies set forth by the World Health Organization, we propose that a model system based upon the Global Health Network can serve as an effective vehicle towards the prevention of occupational lung diseases on a global scale. It has the potential to: (1) enhance transmission of data and collaboration with the primary health care system in disease surveillance; (2) strengthen research and information transfer and (3) promote education and training at all levels of prevention, with a possible application to the interpretation of chest radiograms.
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Affiliation(s)
- K Takahashi
- Institute of Industrial Ecological Sciences, University of Occupational and Environmental Health, Japan.
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Ren A, Okubo T, Takahashi K. Health status, health habits, utilization behaviour and health care utilization in an actively employed Japanese population. Occup Med (Lond) 1995; 45:186-92. [PMID: 7662932 DOI: 10.1093/occmed/45.4.186] [Citation(s) in RCA: 4] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Healthcare utilization data from 1 February 1986 to 31 January 1992 for 18,601 local public service employees were analysed in relation to data on their perceived health status, health habits, health care utilization behaviour and health-related worries which were obtained from a questionnaire survey conducted in 1988. The results showed health care utilization behaviour as defined by the questionnaire responses to be the most important predictor of health care utilization as defined by claim rate and group utilization rate, followed by perceived health status and certain health habits (ie caring about sleep, food and diet, watching body weight). Health-related worries, when used as a group variable, were not an independent predictor of utilization. The co-existence of 'active' utilization behaviour or the above-mentioned health habits with fair/poor perceived health status was associated with the highest health care utilization. The implication of these findings is that if utilization behaviour modification is incorporated into various worksite health programmes that aim at improving employee health and containing health care utilization and costs, greater reduction can be achieved in employee health care utilization and costs.
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Affiliation(s)
- A Ren
- Department of Environmental Epidemiology, University of Occupational and Environmental Health, Kitakyushu, Japan
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Abstract
This study examines the association of health-related worries (over cancers, diabetes, work-related stress, heart attack, obesity, general physical fitness, and/or other health conditions) and perceived health status (excellent, good, fair or poor) to the utilization of health care services for 19, 139 Japanese local public service employees. Data on health-related worries and health status were obtained from a self-administered questionnaire survey in 1988 and analyzed in relation to the subsequent 12-month utilization of health care. Results showed that perceived health status was associated with the utilization for almost all medical conditions and so was worry over a specific condition and the subsequent utilization of health care services. The implication of these findings is that measures targeting the relief of an employee's health-related worries, through either health consultation or other health programs, may contribute to the reduction of an employee's health care utilization and costs.
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Affiliation(s)
- A Ren
- Department of Environmental Epidemiology, University of Occupational and Environmental Health, Kitakyushu, Japan
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Ren A, Okubo T, Takahashi K. Comprehensive periodic health examination: impact on health care utilisation and costs in a working population in Japan. J Epidemiol Community Health 1994; 48:476-81. [PMID: 7964358 PMCID: PMC1060011 DOI: 10.1136/jech.48.5.476] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [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: 01/28/2023]
Abstract
STUDY OBJECTIVE To examine the impact of a comprehensive periodic health examination programme on health care utilisation and costs in a working population. DESIGN A cohort method was used to observe the trends in health care utilisation and costs for a group of local government employees from 1 February 1986 until 31 January 1992, during which time (in 1988) a comprehensive periodic health examination programme had been introduced. Health care utilisation was measured by a claim rate per employee (number of claims in a year divided by number of employees) and a utilisation rate per 100 employees (number of employees who submitted at least one claim in a year divided by number of employees x 100). Health care costs were measured by claim costs per employee (total cost of claims divided by number of employees). National and prefectural changes in per capita health care costs were used for the adjustment of claim costs. Internal comparisons were made in relation to the intensiveness of the periodic health examinations administered before the introduction of the comprehensive programme. SETTING Fukuoka Prefecture, Japan. PARTICIPANTS A total of 19,146 local government employees (12,455 men, 6691 women) who worked in small cities, towns, and villages in Fukuoka Prefecture throughout the study period participated. MAIN RESULTS Both the claim and utilisation rates showed an increase in 1988 when the comprehensive programme was introduced. After adjustment for the national changes in per capita health care costs and the aging effect of the study participants, substantial increases in claim costs were noted after introduction of the comprehensive programme. The programme had a greater but short term effect of increasing the health care utilisation of those who had received less intensive periodic health examinations before 1988, but no similar effect on claim costs was noted. CONCLUSIONS The comprehensive programme had some role in increasing health care utilisation and costs. Its effect on costs was confirmed when the general population or another population was used as a reference. When comparisons were made internally, the comprehensive programme was seen to have had a greater but short term effect of increasing the utilisation of those who had previously received less intensive health examinations to equalise the health care utilisation and costs within the study population.
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Affiliation(s)
- A Ren
- Department of Environmental Epidemiology, University of Occupational and Environmental Health, Kitakyushu, Japan
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Kuo SP, Ren A, Schmidt G. Frequency downshift in rapidly ionizing media. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 1994; 49:3310-3315. [PMID: 9961598 DOI: 10.1103/physreve.49.3310] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Ren A, Okubo T, Takahashi K. Hospital use behaviors and associated costs in a health insurance organization, Japan. J Insur Med 1993; 25:115-23. [PMID: 10146313] [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: 04/12/2023]
Abstract
Physicians are known to play an important role in the rise of health care costs. But patients--the other side of the chain of health care systems--have been given little attention. The present study utilized the outpatient claims (in the belief that the outpatient hospital visits are mainly decided by the patients) from a health insurance organization in Japan (the Fukuoka Prefecture public service mutual aid association for government employees who serve in small cities, towns, and villages) to analyze the employee behaviors in the use of hospital care and the costs associated with these behaviors. Number of diseases diagnosed for an employee, number of claims an employee submitted for one disease, number of hospitals an employee visited, number of claims an employee had from one hospital, and the total number of claims an employee submitted were used to describe the hospital use behaviors. Results showed that some employees exhibited unusual behaviors, characterized by having an extremely large number of diseases diagnosed, visiting a large number of different hospitals, having a large number of claims, etc. Higher medical expenditures were associated with such behaviors. The findings of this study suggest that the patients' role in the rise of health care costs cannot be ignored, and cost-containment strategies targeting modification of patient behaviors in the use of hospital care may prove to be very useful.
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Affiliation(s)
- A Ren
- Department of Environmental Epidemiology, University of Environmental and Occupational Health, Yahatanishiku, Kitakyushu, Japan
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Ren A, Han X. [Dietary factors and esophageal cancer: a case-control study]. Zhonghua Liu Xing Bing Xue Za Zhi 1991; 12:200-4. [PMID: 1934041] [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] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A hospital-based case-control study of 112 patients with esophageal cancer was conducted to explore the association of dietary factors with cancer of the esophagus. Each case was matched to one non-cancerous patient from surgical department in the hospital of the same sex, age (+/- 5 years), occupation (farmer or nonfarmer), and residence as control. Multivariate conditional logistic regression analysis showed that the consumption of moldy grains (odds ratio (OR), 4.08), pickled vegetables (OR, 2.57), tea drinking habit (OR, 5.65), and hot food consumption (OR, 2.53) were significant risk factors for esophageal cancer. Intake of eggs (OR, 0.30) and higher proportion of flour and rice in the grain ration (greater than 30% vs. less than or equal to 30%) (OR, 0.43) were protective factors. Relations between factors were also discussed in the paper.
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Affiliation(s)
- A Ren
- North China Coal Mining Medical College, Tangshan
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