1
|
A D, Chen CX, Zou MY, Deng YY, Zhang XM, Du JJ, Yang Y. Removal efficiency, kinetic, and behavior of antibiotics from sewage treatment plant effluent in a hybrid constructed wetland and a layered biological filter. J Environ Manage 2021; 288:112435. [PMID: 33823453 DOI: 10.1016/j.jenvman.2021.112435] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 01/18/2021] [Revised: 02/21/2021] [Accepted: 03/18/2021] [Indexed: 06/12/2023]
Abstract
Sewage treatment plant (STP) is the major point source of antibiotic contamination, yet the advanced treatment of antibiotic polluted STP effluent has not been given necessary attention. This study is conducted to evaluate the removal efficiency, kinetic, and behavior of sulfonamides, quinolones, tetracyclines, and macrolides antibiotics from STP effluent in a hybrid constructed wetland (HCW) and a layered biological filter (LBF) at different hydraulic loading rates (HLRs). The results showed that the removal efficiency of antibiotics in all the HLRs was ranked as follow: quinolones of HCW (70-95%) > macrolides of HCW (58-77%) > tetracyclines of both systems (59-67%) > quinolones of LBF (28-64%) > macrolides of LBF (13-25%) > sulfonamides of both systems (<0%). The optimal HLR is 1.0 m/day for quinolones and 2.0 m/day for tetracyclines-macrolides in the HCW, and 6.4 m/day for quinolones-tetracyclines in the LBF, respectively. Although HCW performed better on the removal of most antibiotics, LBF exhibited stronger total loading toleration and higher removal loading ability to antibiotics. Among them, quinolones were markedly removed by multiple effect of substrate adsorption, microbial anaerobic degradation, and photolysis in the HCW (planted), and by filter sorption and interception in the LBF (unplanted); adsorption is the dominant elimination approach for tetracyclines in both systems; plant uptake plays a significant role on the removal of macrolides in the HCW.
Collapse
Affiliation(s)
- Dan A
- Engineering and Technology Research Center for Agricultural Land Pollution Integrated Prevention and Control of Guangdong Higher Education Institute, College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Chun-Xing Chen
- Shenzhen Academy of Environmental Sciences, Shenzhen, 518001, China
| | - Meng-Yao Zou
- Engineering and Technology Research Center for Agricultural Land Pollution Integrated Prevention and Control of Guangdong Higher Education Institute, College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Yang-Yang Deng
- Engineering and Technology Research Center for Agricultural Land Pollution Integrated Prevention and Control of Guangdong Higher Education Institute, College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Xiao-Meng Zhang
- Department of Ecology, Jinan University, Guangzhou, 510632, China; Engineering Research Center of Tropical and Subtropical Aquatic Ecological Engineering, Ministry of Education, Guangzhou, 510632, China
| | - Jian-Jun Du
- Engineering and Technology Research Center for Agricultural Land Pollution Integrated Prevention and Control of Guangdong Higher Education Institute, College of Resources and Environment, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Yang Yang
- Department of Ecology, Jinan University, Guangzhou, 510632, China; Engineering Research Center of Tropical and Subtropical Aquatic Ecological Engineering, Ministry of Education, Guangzhou, 510632, China.
| |
Collapse
|
2
|
Du JJ, Xue HY, Zhao LZ, Zhang ZQ, Xu YG, Hu J, Ye L, Yu CD, Dong YQ. [Laparoscopic circular stapled gastrointestinal anastomosis using novel device of sealed cap access after total laparoscopic gastrectomy]. Zhonghua Wei Chang Wai Ke Za Zhi 2021; 24:370-371. [PMID: 33878828 DOI: 10.3760/cma.j.cn.441530-20210401-00139] [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
Intracorporeal classic gastrointestinal anastomosis using circular stapler in totally laparoscopic gastrectomy (TLG) for gastric cancer requires intracorporeal anvil placement and suitable access for introduction of the circular stapler to the abdominal cavity without gas leak. The novel techniques for anvil placement have been updated, but there is no progress for proper access for circular stapler. In the study, intracorporeal circular-stapled gastrointestinal anastomosis were successfully accomplished using a novel device of sealed cap access with a central hole (WLB-60/70-60/100, Wuhan Widerep Medical Instrument Co.,Ltd, China) customized to the incision protection retractor for the simple and accessible introduction of the circular stapler and anvil under the optimal maintenance of pneumoperitoneum pressure in TLG. In these 3 cases, there was no gas leakage and the pneumoperitoneum was well maintained when performing the gastrointestinal anastomosis, and there was no transition to laparotomy or other anastomosis techniques. The result suggests that the sealed cap access could be a novel choice for introduction of the circular stapler to the abdominal cavity in order to obtain laparoscopic circular-stapled gastroin-testinal anastomosis in TLG.
Collapse
Affiliation(s)
- J J Du
- Department of General Surgery, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - H Y Xue
- Department of General Surgery, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - L Z Zhao
- Department of Digestive Surgery, Hanzhong Central Hospital, Hanzhong, Shanxi 723000, China
| | - Z Q Zhang
- Department of General Surgery, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - Y G Xu
- Department of General Surgery, Huashan Hospital, Fudan University, Shanghai 200040, China
| | - J Hu
- Department of Gastrointestinal Surgery, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - L Ye
- Department of General Surgery, Jiujiang No.1 People's Hospital, Jiujiang, Jiangxi 332000, China
| | - C D Yu
- Department of General Surgery, Jiujiang No.1 People's Hospital, Jiujiang, Jiangxi 332000, China
| | - Y Q Dong
- Department of General Surgery, the First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| |
Collapse
|
3
|
Liu XY, Kong FZ, Du JJ, Chen DB. [Metastatic infiltrating lobular carcinoma of breast with cervical tumor as the first manifestation: a case report]. Zhonghua Zhong Liu Za Zhi 2021; 42:981-982. [PMID: 33256315 DOI: 10.3760/cma.j.cn112152-20200531-00503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- X Y Liu
- Department of Pathology, Peking University People's Hospital, Beijing 100044, China
| | - F Z Kong
- Department of Pathology, Peking University People's Hospital, Beijing 100044, China
| | - J J Du
- Department of Pathology, Peking University People's Hospital, Beijing 100044, China
| | - D B Chen
- Department of Pathology, Peking University People's Hospital, Beijing 100044, China
| |
Collapse
|
4
|
Diao ZH, Dong FX, Yan L, Chen ZL, Qian W, Kong LJ, Zhang ZW, Zhang T, Tao XQ, Du JJ, Jiang D, Chu W. Synergistic oxidation of Bisphenol A in a heterogeneous ultrasound-enhanced sludge biochar catalyst/persulfate process: Reactivity and mechanism. J Hazard Mater 2020; 384:121385. [PMID: 31606253 DOI: 10.1016/j.jhazmat.2019.121385] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [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: 07/21/2019] [Revised: 09/27/2019] [Accepted: 10/02/2019] [Indexed: 06/10/2023]
Abstract
Recently, clean-up of resistant organic compounds has attracted growing attention. In this study, a novel heterogeneous ultrasound-enhanced sludge biochar catalyst/persulfate (BC/PS/US) process was firstly developed for the degradation of bisphenol A (BPA) in water. The results revealed that BC/PS/US process could successfully achieve a positively synergistic effect between sonochemistry and catalytic chemistry on the degradation of BPA compared to its corresponding comparative process. Nearly 98% of BPA could be degraded within 80 min at optimum reaction conditions. The coexisting substances including Cl-, SO42- and NO3- had no obvious inhibition on the BPA degradation, whereas HCO3- and humic acid (HA) had significant inhibition effects on that. PS decomposition of BC/PS/US process was superior to that of BC/PS or US/PS process. Both SO4- and HO participated in the degradation of BPA, but SO4- was predominant radical in the BC/PS/US process. A possible pathway of BPA degradation was proposed, and the BPA molecule was attacked by SO4- and degraded into five kinds of intermediate products through hydroxylation and demethylation processes. This study helps to comprehend the application of sludge biochar catalyst as a persulfate activator for the degradation of organic compounds under ultrasound irradiation, and provides a new strategy in wastewater treatment.
Collapse
Affiliation(s)
- Zeng-Hui Diao
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China; Department of Civil and Environment Engineering, Hong Kong Polytechnic University, Hong Kong.
| | - Fu-Xin Dong
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Liu Yan
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Zhi-Liang Chen
- Guangdong Engineering Technology Research Center of Heavy Metal Pollution Control and Restoration in Farmland Soil, South China Institute of Environmental Sciences, Guangzhou 510635, China
| | - Wei Qian
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | | | - Zai-Wang Zhang
- College of Biological and Environmental Engineering, Binzhou University, Binzhou 256600, China
| | - Tao Zhang
- Guangdong Environmental Monitoring Center, Guangzhou 510045, China
| | - Xue-Qin Tao
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Jian-Jun Du
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Dan Jiang
- Research Resources Center, South China Normal University, Guangzhou 510631, China
| | - Wei Chu
- Department of Civil and Environment Engineering, Hong Kong Polytechnic University, Hong Kong.
| |
Collapse
|
5
|
Diao ZH, Qian W, Lei ZX, Kong LJ, Du JJ, Liu H, Yang JW, Pu SY. Insights on the nitrate reduction and norfloxacin oxidation over a novel nanoscale zero valent iron particle: Reactivity, products, and mechanism. Sci Total Environ 2019; 660:541-549. [PMID: 30641381 DOI: 10.1016/j.scitotenv.2019.01.037] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 12/11/2018] [Accepted: 01/05/2019] [Indexed: 05/26/2023]
Abstract
Herein, the application of a novel acid mine drainage-based nanoscale zero valent iron (AMD-based nZVI) for the remediation of nitrate and norfloxacin (NOR) was studied. Experimental results indicated that the catalytic reactivity of AMD-based nZVI toward nitrate reduction was superior to that of iron salt-based nanoscale zero valent iron (Iron salt-based nZVI). The presence of ultrasound irradiation could significantly enhance the reactivity toward both the nitrate reduction and NOR oxidation processes. The optimal efficiencies of nitrate and NOR by AMD-based nZVI/US process could be kept 96 and 94% within 120 min, respectively. Ammonia was identified as a major product in nitrate reduction process, while three oxidation products were observed in NOR degradation process. Both reduction reaction of nitrate from AMD-based nZVI and oxidation reaction of NOR from US-assisted Fenton system might be involved in AMD-based nZVI/US process. The AMD-based nZVI/US process showed a better performance on the removal of NOR compared with that of nitrate. The findings of the present work could be as a guide and show that AMD-based nZVI/US process is feasible for the remediation of both nitrate and NOR in real wastewater.
Collapse
Affiliation(s)
- Zeng-Hui Diao
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China; Department of Civil and Environment Engineering, The Hong Kong Polytechnic University, Hong Kong, China.
| | - Wei Qian
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Ze-Xiang Lei
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | | | - Jian-Jun Du
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Hui Liu
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Jie-Wen Yang
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Sheng Yan Pu
- Chengdu University of Technology, Chengdu 610059, China.
| |
Collapse
|
6
|
Diao ZH, Pu SY, Qian W, Liang S, Kong LJ, Xia DH, Lei ZX, Du JJ, Liu H, Yang JW. Photocatalytic removal of phenanthrene and algae by a novel Ca-Ag 3PO 4 composite under visible light: Reactivity and coexisting effect. Chemosphere 2019; 221:511-518. [PMID: 30660907 DOI: 10.1016/j.chemosphere.2019.01.044] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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: 09/24/2018] [Revised: 12/24/2018] [Accepted: 01/06/2019] [Indexed: 06/09/2023]
Abstract
In this study, the feasibility of a novel Ca-Ag3PO4 composite with visible light irradiation for the phenanthrene (PHE) degradation and algae inactivation in artificial seawater was firstly investigated. The experimental findings revealed that Ag3PO4 phase was sucessfully formed on the Ca-based material, and the presence of Ca-based material could effectively keep Ag3PO4 particles stable. An excellent performance on PHE degradation or algae inactivation was observed from Ca-Ag3PO4 composite under visible light irradiation. The degradation of PHE or inactivation of algae not only could be efficiently achieved in the single mode, but also could be successfully achieved in the coexisting mode. Above 96% of PHE and algae were simultaneously removed within 12 h in the Ca-Ag3PO4/visible light system. It was further observed that the degradation of PHE and/or inactivation of algae increased with the increase of Ca-Ag3PO4 dosage. HO was the primary radical responsible for PHE degradation, whereas HO and Ag+ released from Ca-Ag3PO4 mainly contributed to the algae inactivation. A possible mechanism involving the catalytic removal of PHE and algae by Ca-Ag3PO4 under visible light irradiation was proposed. This study provides helpful guide for the simultaneous removal of various pollutants in real seawater.
Collapse
Affiliation(s)
- Zeng-Hui Diao
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China; Department of Civil and Environment Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
| | - Sheng-Yan Pu
- Department of Civil and Environment Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong; State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, 610059, China
| | - Wei Qian
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Shan Liang
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Ling-Jun Kong
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - De-Hua Xia
- School of Environmental Science and Technology, Sun Yat-sen University, Guangzhou, 510275, China
| | - Ze-Xiang Lei
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Jian-Jun Du
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Hui Liu
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| | - Jie-Wen Yang
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| |
Collapse
|
7
|
Pang XF, Lin X, Du JJ, Zeng DY. Downregulation of microRNA-592 protects mice from hypoplastic heart and congenital heart disease by inhibition of the Notch signaling pathway through upregulating KCTD10. J Cell Physiol 2018; 234:6033-6041. [PMID: 30478832 DOI: 10.1002/jcp.27190] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [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: 02/12/2018] [Accepted: 07/17/2018] [Indexed: 01/26/2023]
Abstract
Evidence has demonstrated that the microRNA (miR) may play a significant role in the development of congenital heart disease (CHD). Here, we explore the mechanism of microRNA-592 (miR-592) in heart development and CHD with the involvement of KCTD10 and Notch signaling pathway in a CHD mouse model. Cardiac tissues were extracted from CHD and normal mice. Immunohistochemistry staining was performed to detect positive expression rate of KCTD10. A series of inhibitor, activators, and siRNAs was introduced to verified regulatory functions for miR-592 governing KCTD10 in CHD. Furthermore, the effect of miR-592 on cell proliferation and apoptosis was also investigated. Downregulated positive rate of KCTD10 was observed in CHD mice. Downregulation of miR-592 would upregulate expression of KCTD10 and inhibit the activation of Notch signaling pathway, thus promote cell proliferation. This study demonstrates that downregulation of miR-592 prevents CHD and hypoplastic heart by inhibition of the Notch signaling pathway via negatively binding to KCTD10.
Collapse
Affiliation(s)
- Xue-Feng Pang
- Cardiovascular Department, The First Hospital of China Medical University, Shenyang, China
| | - Xue Lin
- Cardiovascular Department, Peking Union Medical College Hospital, Beijing, China
| | - Jian-Jun Du
- Cardiovascular Department, The First Hospital of China Medical University, Shenyang, China
| | - Ding-Yin Zeng
- Cardiovascular Department, The First Hospital of China Medical University, Shenyang, China
| |
Collapse
|
8
|
Diao ZH, Du JJ, Jiang D, Kong LJ, Huo WY, Liu CM, Wu QH, Xu XR. Insights into the simultaneous removal of Cr 6+ and Pb 2+ by a novel sewage sludge-derived biochar immobilized nanoscale zero valent iron: Coexistence effect and mechanism. Sci Total Environ 2018; 642:505-515. [PMID: 29908509 DOI: 10.1016/j.scitotenv.2018.06.093] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [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: 02/25/2018] [Revised: 06/01/2018] [Accepted: 06/08/2018] [Indexed: 06/08/2023]
Abstract
Cr6+ and Pb2+ are both highly toxic pollutants and commonly co-exist in some industrial effluents and contaminated waters. In this study, simultaneous removal of Cr6+ and Pb2+ by a novel sewage sludge-derived biochar immobilized nanoscale zero-valent iron (SSB-nZVI) was systematically investigated. It was well demonstrated that a porous structure was successfully formed on the SSB-nZVI when the starch was used as an additive. A synergistic effect on the adsorption and reduction over the SSB-nZVI was achieved, resulting in nearly 90 and 82% of Cr6+ and Pb2+ removal within 30 min, respectively. Cr6+ was reduced prior to Pb2+. A low pH could accelerate the corrosion of nZVI as well as phosphate leaching. When Malachite green was added as a coexisting organic pollutant, its effective removal was found due to the formation of a Fenton-like system. The SSB-nZVI could be run consecutively three times with a relatively satisfactory performance. Most of Cr6+ was converted into Cr2O3 and Cr(OH)3 on the SSB-nZVI surface, whereas most of Pb2+ species existed as Pb(OH)2 (or PbO). A possible reaction mechanism on the SSB-nZVI involved the adsorption, reduction and precipitation of both Cr6+ and Pb2+ over the particles. Present study sheds light on the insight of the fate and transport of Cr6+ and Pb2+ in aquatic environment, as well provides helpful guide for the remediation of coexistence of pollutants in real applications.
Collapse
Affiliation(s)
- Zeng-Hui Diao
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China.
| | - Jian-Jun Du
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
| | - Dan Jiang
- Research Resources Center, South China Normal University, Guangzhou 510631, China
| | - Ling-Jun Kong
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou 510006, China
| | - Wen-Yi Huo
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
| | - Cui-Mei Liu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
| | - Qi-Hang Wu
- Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Center for Water Quality and Conservation of the Pearl River Delta, Guangzhou University, Guangzhou 510006, China
| | - Xiang-Rong Xu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China.
| |
Collapse
|
9
|
Liu CM, Diao ZH, Huo WY, Kong LJ, Du JJ. Simultaneous removal of Cu 2+ and bisphenol A by a novel biochar-supported zero valent iron from aqueous solution: Synthesis, reactivity and mechanism. Environ Pollut 2018; 239:698-705. [PMID: 29715689 DOI: 10.1016/j.envpol.2018.04.084] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [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: 11/28/2017] [Revised: 03/24/2018] [Accepted: 04/19/2018] [Indexed: 06/08/2023]
Abstract
In this study, a novel biochar-supported zero valent iron (BC-nZVI) was synthesized through a green method. A high performance on the simultaneous removal of Cu2+ and bisphenol A (BPA) by a combination of BC-nZVI with persulfate (BC-nZVI/PS) system was successfully achieved. The simultaneous efficiencies of Cu2+ and BPA could reach 96 and 98% within 60 min, respectively. Both HO• and SO4•- were two major reactive species in BC-nZVI/PS system, and SO4•- was primary radical responsible for the degradation of BPA. Four kinds of Cu species, such as Cu(OH)2, CuO, Cu2O and Cu0 were generated via the adsorption and reduction of the BC-nZVI, whereas six kinds of products of BPA including p-isopropenyl phenol and 4-isopropylphenol were generated via the combined oxidation of SO4•- and HO•. The possible reaction mechanism for the simultaneous removal of Cu2+ and BPA by BC-nZVI/PS system contained a synergistic effect between the reduction of Cu2+ and the oxidation of BPA. This is the first report on the feasibility of the remediation of coexistence of heavy metal and organic compound in aquatic environment using the BC-nZVI/PS system.
Collapse
Affiliation(s)
- Cui-Mei Liu
- The Center for Marine Environment Engineering, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Zeng-Hui Diao
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China; CAS Key Laboratory of Tropical Marine Bio-resources and Ecology, Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China.
| | - Wen-Yi Huo
- The Center for Marine Environment Engineering, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Ling-Jun Kong
- School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Jian-Jun Du
- School of Environmental Science and Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
| |
Collapse
|
10
|
Guo YL, Ma SM, Du JJ, Chen JL. Effects of Light Intensity on Growth, Anti-Stress Ability and Immune Function in Yellow Feathered Broilers. ACTA ACUST UNITED AC 2018. [DOI: 10.1590/1806-9061-2017-0542] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- YL Guo
- Gansu Agricultural University, China
| | - SM Ma
- Gansu Agricultural University, China
| | - JJ Du
- Gansu Agricultural University, China
| | - JL Chen
- Chinese Academy of Agricultural Sciences, China
| |
Collapse
|
11
|
Luo YT, Du JJ, Yu G, Jiang XJ. [Analysis of clinical characteristics and treatment outcome of atypical early stage malignant laryngeal tumor]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2016; 30:1467-1469. [PMID: 29871118 DOI: 10.13201/j.issn.1001-1781.2016.18.010] [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] [Received: 06/05/2016] [Indexed: 11/12/2022]
Abstract
Objective:To observe the clinical characteristics of 22 cases of malignant laryngeal tumor manifested as smooth mass, and explore the diagnosis, pathological types and treatment of the disease.Method:Manifested as smooth mass, 22 cases diagnosed as malignant or borderline tumor by biopsy were collected to summarize the characteristics of pathology, treatment and prognosis. Result:The sex ratio was 13∶9. Eleven cases were diagnosed as malignant tumors of epithelial or mesenchymal origin, 7 cases of tumors of lymphoid hematopoietic system, 4 cases of borderline tumor.Thirteen patients received surgical treatment, and recurrence was not found in postoperative follow-up.Nine patients received radiotherapy and/or chemotherapy, 7 of them were in remission while 2 cases presented progression and metastasis of cervical lymph nodes. Conclusion:Because of lacking typical clinical manifestations in early stage,smooth mass of larynx often easily lead to misdiagnosis.If found and operated early,the prognosis can be satisfied,but the treatment outcome of lymphoma is poor.
Collapse
Affiliation(s)
- Y T Luo
- Department of Otolaryngology,the First Affiliated Hospital of China Medical University,Shenyang,110001,China
| | - J J Du
- Department of Otolaryngology,the First Affiliated Hospital of China Medical University,Shenyang,110001,China
| | - G Yu
- Department of Otolaryngology,the First Affiliated Hospital of China Medical University,Shenyang,110001,China
| | - X J Jiang
- Department of Otolaryngology,the First Affiliated Hospital of China Medical University,Shenyang,110001,China
| |
Collapse
|
12
|
Chui ST, Du JJ, Yau ST. Resonances and circuit theory for the interaction of metallic disks and annuli with an electromagnetic field. Phys Rev E Stat Nonlin Soft Matter Phys 2014; 90:053202. [PMID: 25493895 DOI: 10.1103/physreve.90.053202] [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] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Indexed: 06/04/2023]
Abstract
To understand the nature of the electromagnetic resonances of finite metallic surfaces, we formulate a rigorous and rapidly convergent circuit theory for the interaction of a metallic disk and a metallic annulus with an electromagnetic field. Expressions for the current induced and the resonance condition are derived. A new understanding of the nature of the resonances is obtained. For half of the resonances we find a divergent electric field at the edge of the disk, even though it is smooth in shape. For the disk, we compare with previous results using vector spheroidal wave functions and found good agreement for the resonance condition. Our approach can be generalized to other finite surfaces.
Collapse
Affiliation(s)
- S T Chui
- Department of Physics and Astronomy, Bartol Research Institute, University of Delaware, Newark, Delaware 19716, USA
| | - J J Du
- Department of Physics, East China Normal University, Shanghai 200062, China
| | - S T Yau
- Department of Mathematics and Department of Physics, Harvard University, Cambridge, Massachusetts 02138, USA
| |
Collapse
|
13
|
Du JJ. [Technique of intracorporeal gastrointestinal anastomosis after total laparoscopic gastrectomy]. Zhonghua Wei Chang Wai Ke Za Zhi 2013; 16:605-608. [PMID: 23888437] [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: 06/02/2023]
Abstract
Malignant or benign diseases of stomach are very common in China. The application of laparoscopy surgery in gastric diseases is a remarkable symbol of current gastric surgery. Laparoscopic assisted radical gastrectomy has gained widespread acceptance for the treatment of gastric cancer. Total laparoscopic radical gastrectomy, which means the gastric resection, lymph nodes dissection and gastrointestinal anastomosis are entirely performed in intracorporeally, is the inheritance and progression of laparoscopic assisted radical gastrectomy. However, controversy still exists regarding the risk and difficulty of intracorporeal anastomosis. In Asian countries including China, total laparoscopic radical gastrectomy has not been extensively performed yet. This review focuses on the issues related to intracorporeal gastrointestinal reconstruction in laparoscopic procedure, such as its history and current status, as well as the surgical technique and risk.
Collapse
Affiliation(s)
- Jian-Jun Du
- Department of Surgery, The Fourth Military Medical University, Xi'an, China.
| |
Collapse
|
14
|
Li JP, Zheng JY, Du JJ, Zhang R, Yang AG. What is the relationship among microRNA-181, epithelial cell-adhesion molecule (EpCAM) and beta-catenin in hepatic cancer stem cells. Hepatology 2009; 50:2047-8; author reply 448. [PMID: 19937678 DOI: 10.1002/hep.23356] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
15
|
Xu ZG, Du JJ, Cui SJ, Wang ZQ, Huo KK, Li YY, Han ZG. Identification ofLZPGene fromMus musculusandRattus norvegicusCoding for a Novel Liver-specific ZP Domain-Containing Secretory Protein. ACTA ACUST UNITED AC 2009; 15:81-7. [PMID: 15346761 DOI: 10.1080/10425170310001652200] [Citation(s) in RCA: 7] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Zona pellucida (ZP) domain has been recognized in a number of receptor-like eukaryotic glycoproteins, which involved in many important biological processes, such as signal transduction, development, differentiation and so on. Here we report the identification of Mus musculus and Rattus norvegicus orthologues of Homo sapiens LZP gene which codes for a novel ZP domain-containing protein. Sequence analysis revealed that human, rat and mouse LZP proteins are highly conserved. Mouse LZP gene has two transcripts, 2.4 and 2.8 KB long respectively, coding for identical protein. Mouse LZP mRNA is expressed specifically in hepatocytes. Our data also showed that mouse LZP localizes mostly on nuclear envelope, and at the same time, it can be secreted into blood in a truncated form.
Collapse
Affiliation(s)
- Zhi-Gang Xu
- State Key Laboratory of Genetic Engineering, Institute of Genetics, School of Life Science, Fudan University, 220 Han Dan Road, Shanghai, 200433, China
| | | | | | | | | | | | | |
Collapse
|
16
|
Liu J, Li X, Dong GL, Zhang HW, Chen DL, Du JJ, Zheng JY, Li JP, Wang WZ. In silico analysis and verification of S100 gene expression in gastric cancer. BMC Cancer 2008; 8:261. [PMID: 18793447 PMCID: PMC2567992 DOI: 10.1186/1471-2407-8-261] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2008] [Accepted: 09/16/2008] [Indexed: 01/21/2023] Open
Abstract
Background The S100 protein family comprises 22 members whose protein sequences encompass at least one EF-hand Ca2+ binding motif. They were involved in the regulation of a number of cellular processes such as cell cycle progression and differentiation. However, the expression status of S100 family members in gastric cancer was not known yet. Methods Combined with analysis of series analysis of gene expression, virtual Northern blot and microarray data, the expression levels of S100 family members in normal and malignant stomach tissues were systematically investigated. The expression of S100A3 was further evaluated by quantitative RT-PCR. Results At least 5 S100 genes were found to be upregulated in gastric cance by in silico analysis. Among them, four genes, including S100A2, S100A4, S100A7 and S100A10, were reported to overexpressed in gastric cancer previously. The expression of S100A3 in eighty patients of gastric cancer was further examined. The results showed that the mean expression levels of S100A3 in gastric cancer tissues were 2.5 times as high as in adjacent non-tumorous tissues. S100A3 expression was correlated with tumor differentiation and TNM (Tumor-Node-Metastasis) stage of gastric cancer, which was relatively highly expressed in poorly differentiated and advanced gastric cancer tissues (P < 0.05). Conclusion To our knowledge this is the first report of systematic evaluation of S100 gene expressions in gastric cancers by multiple in silico analysis. The results indicated that overexpression of S100 gene family members were characteristics of gastric cancers and S100A3 might play important roles in differentiation and progression of gastric cancer.
Collapse
Affiliation(s)
- Ji Liu
- Department of Gastrointestinal Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, 710032, PR China.
| | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Du JJ, Wang WZ, Li JP, Zheng JY, Ji G, Li YQ, Liu XN, Chen DL, Cheng JX, Gao ZQ, Dou KF. [Laparoscopy-assisted D2 total gastrectomy in advanced gastric cancer]. Zhonghua Wai Ke Za Zhi 2008; 46:21-23. [PMID: 18509996] [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: 05/26/2023]
Abstract
OBJECTIVE To investigate the efficacy and advantages of laparoscopy-assisted total gastrectomy (LATG) with D2 dissection of lymph nodes versus conventional open D2 total gastrectomy (OTG) in advanced gastric cancer. METHODS One hundred and twenty-five patients with advanced gastric cancer in the middle or upper third of the stomach were operated on from July 2005 to March 2007. Of the patients, 59 cases received LATG and 66 OTG with D2 lymph nodes dissection. Clinical data were recorded and compared between the two groups. RESULTS No patient in the LATG group converted to conventional operation with laparotomy. No operation mortality and no severe morbidity occurred in LATG group. As compared with OTG group, in LATG group operation time was longer [(330 +/- 71) min vs. (261 +/- 54) min, P =0.005] in LATG group, but with similar number of lymph node retrieval (36 +/- 13 vs. 34 +/- 16, P =0.450), less operation blood loss [(175 +/- 101) ml vs. (359 +/- 210) ml, P =0.003], earlier recovery of bowel activity (P = 0.015), and a shorter duration of fever after operation (P = 0.024). CONCLUSIONS LATG with D2 lymph node dissection in advanced gastric cancer is safe and technically feasible with better operative access and visual field, less operation blood loss and earlier recovery.
Collapse
Affiliation(s)
- Jian-Jun Du
- Department of General Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an 710032, China.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Du JJ, Yang XY, Du YJ. From medical images to finite grids system. Conf Proc IEEE Eng Med Biol Soc 2007; 2005:1630-3. [PMID: 17282520 DOI: 10.1109/iembs.2005.1616751] [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] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The development techniques of implementation of converting the medical slice images to 3-D finite element grids are discussed, and an integrated system based on ITK and VTK is built. The system can provide a series of functions including image reading, reduction, segmentation, reconstruction and finite element grids generation with flexible user's graphics interface. At same time, this system can also provide a powerful tool for the design, choice or assessment of image segmentation and reconstruction algorithm.
Collapse
Affiliation(s)
- Jian-Jun Du
- Biomedical Engineering Center, Beijing University of Technology, Beijing, China
| | | | | |
Collapse
|
19
|
Xu ZG, Du JJ, Zhang X, Cheng ZH, Ma ZZ, Xiao HS, Yu L, Wang ZQ, Li YY, Huo KK, Han ZG. A novel liver-specific zona pellucida domain containing protein that is expressed rarely in hepatocellular carcinoma. Hepatology 2003; 38:735-44. [PMID: 12939600 DOI: 10.1053/jhep.2003.50340] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [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: 12/27/2022]
Abstract
We currently identified a liver-specific gene that encodes a novel zona pellucida (ZP) domain-containing protein named liver-specific ZP domain-containing protein (LZP). The full-length complementary DNA (cDNA) of human LZP has 2,255 bp with a complete open reading frame (ORF) of 1,635 bp. The gene is localized on chromosome 10q21.3 and spans 40 kb with 9 encoding exons and 8 introns. The deduced protein sequence has 545 amino acid residues, with an N-terminal signal peptide followed by 3 epidermal growth factor (EGF)-like domains and a ZP domain in C-terminal section. Interestingly, human LZP is expressed specifically in liver out of 23 tissues examined, and its mouse counterpart was detected at very early stage during embryo development. Moreover, LZP can be secreted into blood, albeit the protein was localized mainly on the nuclear envelop of hepatocytes. Most importantly, LZP is down-regulated in hepatocellular carcinoma (HCC) and HCC cell lines; meanwhile, the decreased level of hLZP messenger RNA (mRNA) could, at least in some HCC samples, be related to the methylation status of the putative LZP promoter. However, overexpression of hLZP in HCC cell line SMMC-7721 and human liver cell line L02 by stable cell transfection did not inhibit cell growth, implying that the down-regulation of hLZP in HCC might be a consequence of the dedifferentiation involved in hepatocarcinogenesis. In conclusion, these data suggest that LZP is a liver-specific protein involved possibly in hepatocellular function and development, and the protein could be used as potential negative biomarker for HCC pathologic diagnosis.
Collapse
Affiliation(s)
- Zhi-Gang Xu
- Chinese National Human Genome Center at Shanghai, Shanghai, China
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Du JJ, Dou KF, Peng SY, Qian BZ, Xiao HS, Liu F, Wang WZ, Guan WX, Gao ZQ, Liu YB, Han ZG. Expression of NGF family and their receptors in gastric carcinoma: A cDNA microarray study. World J Gastroenterol 2003; 9:1431-4. [PMID: 12854135 PMCID: PMC4615477 DOI: 10.3748/wjg.v9.i7.1431] [Citation(s) in RCA: 7] [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] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the expression of NGF family and their receptors in gastric carcinoma and normal gastric mucosa, and to elucidate their effects on gastric carcinoma.
METHODS: RNA of gastric cancer tissues and normal gastric tissues was respectively isolated and mRNA was purified. Probes of both mRNA reverse transcription product cDNAs labled with α-33P dATP were respectively hybridized with Atlas Array membrane where NGF and their family genes were spotted on. Hybridized signal images were scanned on phosphor screen with ImageQuant 5.1 software after hybridization. Normalized values on spots were analyzed with ArrayVersion 5.0 software. Differential expression of NGF family and their receptors mRNA was confirmed between hybridized Atlas Array membranes of gastric cancer tissues and normal gastric mucosa, then their effects on gastric carcinoma were investigated.
RESULTS: Hybridization signal images on Atlas Array membrane appeared in a lower level of nonspecific hybridization. Both of NGF family and their receptors Trk family mRNA were expressed in gastric cancer and normal gastric mucosa. But adversely up-regulated expression in other tissues and organs. NGF, BDGF, NT-3, NT-4/5, NT-6 and TrkA, B and C were down-regulated simultaneously in gastric carcinoma in comparison with normal gastric mucosa. Degrees of down-regulation in NGF family were greater than those in their receptors Trk family. Down-regulation of NT-3 and BDGF was the most significant, and TrkC down-regulation level was the lowest in receptors Trk family.
CONCLUSION: Down-regulated expression of NGF family and their receptors Trk family mRNA in gastric cancer is confirmed. NGF family and their receptors Trk family probably play a unique role in gastric cancer cell apoptosis by a novel Ras or Raf signal transduction pathway. Their synchronous effects are closely associated with occurrence and development of gastric carcinoma induced by reduction of signal transduction of programmed cell death.
Collapse
Affiliation(s)
- Jian-Jun Du
- Department of General Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shanxi Province, China
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Du JJ, Dou KF, Peng SY, Xiao HS, Wang WZ, Guan WX, Wang ZH, Gao ZQ, Liu YB. cDNA suppression subtraction library for screening down-regulated genes in gastric carcinoma. World J Gastroenterol 2003; 9:1439-43. [PMID: 12854137 PMCID: PMC4615479 DOI: 10.3748/wjg.v9.i7.1439] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To establish cDNA suppression subtraction library with a high subtraction efficiency by counterpart normal gastric mucosa mixture mRNA subtracting gastric cancer cells mixture mRNA for screening down-regulated genes in gastric carcinoma.
METHODS: RNA of gastric cancer tissues and counterpart normal gastric mucosa were respectively isolated in five patients with gastric cancer, and their mRNA was purified. cDNA suppression subtraction library was established by counterpart normal gastric mucosa mixture mRNA (tester) subtracting gastric cancer tissues mixture mRNA (driver) of five patients with gastric carcinoma. The library plasmids were transformed into competent bacteria DH5a after ligation of the library cDNA fragments with T vectors. Library plasmids were extracted after picking colonies and shaking bacteria overnight. Its subtraction efficiency was confirmed by PCR and reverse hybridization of a nylon filter onto which the colonies of bacteria were transfered with probes of reverse transcription products cDNA of gastric cancer tissues mRNA and counterpart normal gastric mucosa mRNA labeled with α-32P dCTP.
RESULTS: mRNA purified from total RNA of gastric cancer tissues and counterpart normal gastric mucosa in five patients with gastric carcinoma revealed a good quality. cDNA suppression subtraction library constructed for screening down-regulated genes in gastric carcinoma represented a high subtraction efficiency. 86% of differential expression in down-regulated genes between counterpart normal gastric mucosa and gastric carcinoma was confirmed.
CONCLUSION: cDNA suppression subtraction library with a high subtraction efficiency for screening down-regulated genes in gastric carcinoma is successfully established.
Collapse
Affiliation(s)
- Jian-Jun Du
- Department of General Surgery, Xijing Hospital, The Fourth Military Medical University, Xian 710032, Shaanxi Province, China
| | | | | | | | | | | | | | | | | |
Collapse
|
22
|
Xu XR, Huang J, Xu ZG, Qian BZ, Zhu ZD, Yan Q, Cai T, Zhang X, Xiao HS, Qu J, Liu F, Huang QH, Cheng ZH, Li NG, Du JJ, Hu W, Shen KT, Lu G, Fu G, Zhong M, Xu SH, Gu WY, Huang W, Zhao XT, Hu GX, Gu JR, Chen Z, Han ZG. Insight into hepatocellular carcinogenesis at transcriptome level by comparing gene expression profiles of hepatocellular carcinoma with those of corresponding noncancerous liver. Proc Natl Acad Sci U S A 2001; 98:15089-94. [PMID: 11752456 PMCID: PMC64988 DOI: 10.1073/pnas.241522398] [Citation(s) in RCA: 272] [Impact Index Per Article: 11.8] [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: 02/06/2023] Open
Abstract
Human hepatocellular carcinoma (HCC) is one of the most common cancers worldwide. In this work, we report on a comprehensive characterization of gene expression profiles of hepatitis B virus-positive HCC through the generation of a large set of 5'-read expressed sequence tag (EST) clusters (11,065 in total) from HCC and noncancerous liver samples, which then were applied to a cDNA microarray system containing 12,393 genes/ESTs and to comparison with a public database. The commercial cDNA microarray, which contains 1,176 known genes related to oncogenesis, was used also for profiling gene expression. Integrated data from the above approaches identified 2,253 genes/ESTs as candidates with differential expression. A number of genes related to oncogenesis and hepatic function/differentiation were selected for further semiquantitative reverse transcriptase-PCR analysis in 29 paired HCC/noncancerous liver samples. Many genes involved in cell cycle regulation such as cyclins, cyclin-dependent kinases, and cell cycle negative regulators were deregulated in most patients with HCC. Aberrant expression of the Wnt-beta-catenin pathway and enzymes for DNA replication also could contribute to the pathogenesis of HCC. The alteration of transcription levels was noted in a large number of genes implicated in metabolism, whereas a profile change of others might represent a status of dedifferentiation of the malignant hepatocytes, both considered as potential markers of diagnostic value. Notably, the altered transcriptome profiles in HCC could be correlated to a number of chromosome regions with amplification or loss of heterozygosity, providing one of the underlying causes of the transcription anomaly of HCC.
Collapse
Affiliation(s)
- X R Xu
- Chinese National Human Genome Center at Shanghai, 351 Guo Shou-Jing Road, Shanghai 201203, China
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
23
|
Du JJ, el-Sayed MA, Stern LJ, Mogi T, Khorana HG. Sensitivity of the retinal circular dichroism of bacteriorhodopsin to the mutagenetic single substitution of amino acids: tyrosine. FEBS Lett 1990; 262:155-8. [PMID: 2185945 DOI: 10.1016/0014-5793(90)80178-l] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [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
Bacteriorhodopsin (bR) in the native purple membrane, in wild type expressed in E. coli and reconstituted in lipid vesicles, and its constituted mutants with substitutions of Tyr-185 by Phe all are found to have different visible retinal CD spectra. The results strongly suggest that the environment of the retinal in bR determines the sign and heterogeneity of its visible retinal CD spectrum. This supports the recent proposal that the observed biphasic CD spectrum of bR is due to the superposition of the CD spectra having opposite signs of more than one type of bR rather than due to exciton coupling.
Collapse
Affiliation(s)
- J J Du
- Department of Chemistry and Biochemistry, University of California, Los Angeles 90024
| | | | | | | | | |
Collapse
|