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Zhao B, Jiang W, Wang J, Sheng G, Wang Y, Meng K, Yang T. A prognostic signature of fatty acid metabolism-related genes for predicting survival of gastric cancer patients. J Biochem Mol Toxicol 2024; 38:e23687. [PMID: 38515005 DOI: 10.1002/jbt.23687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 02/13/2024] [Accepted: 03/07/2024] [Indexed: 03/23/2024]
Abstract
To analyze the expression profile of fatty acid metabolism (FAM)-related genes, identify a prognostic signature, and evaluate its clinical value for gastric cancer (GC) patients. The mRNA expression profiles of 493 FAM-related genes were obtained from TCGA database. Differentially expressed genes (DEGs) between cancer and non-cancer samples were identified, and their relationships with overall survival (OS) of GC patients were evaluated. A prognostic signature of FAM-related genes was identified by the LASSO regression model, and its predictive performance was tested by an independent external cohort. Ninety-three DEGs were identified, of which 44 were downregulated and 49 were upregulated. After optimizing risk characteristics, a prognostic signature of four FAM-related genes (ACBD5, AVPR1A, ELOVL4, and FAAH) were developed. All patients were divided into high-risk (>1.020) and low-risk groups (≤1.020) on the basis of the median risk score. Survival analysis indicated that high-risk patients had a shorter OS than low-risk patients (5-year OS rate, 26.3% vs. 45.0%, p < 0.001). The AUC values for the prediction of 3-year and 5-year OS were 0.664 and 0.624, respectively. In the GSE62254 data set, the 5-year OS rate of high-risk and low-risk patients were 44.7% versus 61.5%, respectively (p = 0.003). The AUC values were 0.632 and 0.627 at 3-year and 5-year prediction. The prognostic signature of FAM-related genes was an independent predictor of OS (hanzard ratio [HR] for TCGA cohort: 1.851, 95% confidence interval [CI]: 1.394-2.458, p < 0.001; HR for GSE62254: 1.549, 95% CI: 1.098-2.185, p = 0.013). The risk signature of four FAM-related genes was a valuable prognostic tool, and it might be helpful for clinical management and therapeutic decision of gastric cancer patients.
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Affiliation(s)
- Bochao Zhao
- Department of Gastrointestinal Surgery, Tianjin First Central Hospital, Nankai District, Tianjin, China
| | - Wei Jiang
- Department of Gastrointestinal Surgery, Tianjin First Central Hospital, Nankai District, Tianjin, China
| | - Jingchao Wang
- Department of Gastrointestinal Surgery, Tianjin First Central Hospital, Nankai District, Tianjin, China
| | - Guannan Sheng
- Department of Gastrointestinal Surgery, Tianjin First Central Hospital, Nankai District, Tianjin, China
| | - Yiming Wang
- Department of Gastrointestinal Surgery, Tianjin First Central Hospital, Nankai District, Tianjin, China
| | - Kewei Meng
- Department of Gastrointestinal Surgery, Tianjin First Central Hospital, Nankai District, Tianjin, China
| | - Tao Yang
- Department of Gastrointestinal Surgery, Tianjin First Central Hospital, Nankai District, Tianjin, China
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Liang Y, Sheng G, Guo Y, Zou Y, Guo H, Li Z, Chang S, Man Q, Gao S, Hao J. Prognostic significance of grade of malignancy based on histopathological differentiation and Ki-67 in pancreatic ductal adenocarcinoma. Cancer Biol Med 2024:j.issn.2095-3941.2023.0363. [PMID: 38172499 DOI: 10.20892/j.issn.2095-3941.2023.0363] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2024] Open
Abstract
OBJECTIVE Tumor cell malignancy is indicated by histopathological differentiation and cell proliferation. Ki-67, an indicator of cellular proliferation, has been used for tumor grading and classification in breast cancer and neuroendocrine tumors. However, its prognostic significance in pancreatic ductal adenocarcinoma (PDAC) remains uncertain. METHODS Patients who underwent radical pancreatectomy for PDAC were retrospectively enrolled, and relevant prognostic factors were examined. Grade of malignancy (GOM), a novel index based on histopathological differentiation and Ki-67, is proposed, and its clinical significance was evaluated. RESULTS The optimal threshold for Ki-67 was determined to be 30%. Patients with a Ki-67 expression level > 30% rather than ≤ 30% had significantly shorter 5-year overall survival (OS) and recurrence-free survival (RFS). In multivariate analysis, both histopathological differentiation and Ki-67 were identified as independent prognostic factors for OS and RFS. The GOM was used to independently stratify OS and RFS into 3 tiers, regardless of TNM stage and other established prognostic factors. The tumor-node-metastasis-GOM stage was used to stratify survival into 5 distinct tiers, and surpassed the predictive performance of TNM stage for OS and RFS. CONCLUSIONS Ki-67 is a valuable prognostic indicator for PDAC. Inclusion of the GOM in the TNM staging system may potentially enhance prognostic accuracy for PDAC.
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Affiliation(s)
- Yuexiang Liang
- Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, China
- Department of Gastrointestinal Oncology, The First Affiliated Hospital of Hainan Medical University, Haikou 570102, China
| | - Guannan Sheng
- Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, China
| | - Yu Guo
- Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, China
| | - Yiping Zou
- Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, China
| | - Hanhan Guo
- Department of Gastrointestinal Oncology, The First Affiliated Hospital of Hainan Medical University, Haikou 570102, China
| | - Zhifei Li
- Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, China
| | - Shaofei Chang
- Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, China
- Department of Gastrointestinal Pancreatic Surgery, Shanxi Provincial People's Hospital, Taiyuan 030012, China
| | - Quan Man
- Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, China
| | - Song Gao
- Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, China
| | - Jihui Hao
- Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute & Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin 300060, China
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Zhao B, Wang J, Sheng G, Wang Y, Yang T, Meng K. Identifying a Risk Signature of Methylation-Driven Genes as a Predictor of Survival Outcome for Colon Cancer Patients. Appl Biochem Biotechnol 2023:10.1007/s12010-023-04751-z. [PMID: 37906409 DOI: 10.1007/s12010-023-04751-z] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/17/2023] [Indexed: 11/02/2023]
Abstract
Aberrant expression of gene is driven by its promoter methylation and is the key molecular basis of carcinogenic processes. This study aimed at identifying a risk signature of methylation-driven (MD) genes and evaluating its prognostic value for colon cancer (CC) patients. The expression profiles of methylation and mRNA in CC samples were obtained from the TCGA database, and the MethylMix algorithm was used to identify MD genes. The relationships between their expression levels and overall survival (OS) of CC patients were analyzed, and a prognostic signature of MD genes was established. The risk score of gene signature was calculated, and the median was used to divide all patients into high (H) and low (L) risk groups. The prognostic value of gene signature was tested by the TCGA cohort and an independent validation cohort (GSE17538 dataset). In total, 69 MD genes were identified, and 7 were associated with OS of CC patients. Ultimately, 4 (TWIST1, LDOC1, EPHX3, and STC2) were screened out to establish a risk signature. The H-risk patients (>0.923) had a worse OS than L-risk patients (≤0.923) in both the TCGA (5-year cumulative survival: 52.9% vs 72.0%, P=0.005) and GSE17538 cohort (49.4% vs 69.3%, P=0.004). The AUC values of MD genes signature for the prediction of 3- and 5-year OS were 0.648 and 0.643 in the TCGA dataset and 0.634 and 0.624 in the GSE17538 dataset, respectively. The risk signature of four MD genes was identified as an independent predictor of OS for CC patients (HR for TCGA dataset: 2.071, 95% CI=1.196-3.586, P=0.009; HR for GSE17538 dataset: 2.021, 95% CI=1.290-3.166, P=0.002). The risk signature of four MD genes might be a useful prognostic tool and help doctors improve the clinical management of CC patients.
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Affiliation(s)
- Bochao Zhao
- Department of Gastrointestinal Surgery, Tianjin First Central Hospital, No.24 Fukang Road, Nankai District, Tianjin, 300190, People's Republic of China.
| | - Jingchao Wang
- Department of Gastrointestinal Surgery, Tianjin First Central Hospital, No.24 Fukang Road, Nankai District, Tianjin, 300190, People's Republic of China
| | - Guannan Sheng
- Department of Gastrointestinal Surgery, Tianjin First Central Hospital, No.24 Fukang Road, Nankai District, Tianjin, 300190, People's Republic of China
| | - Yiming Wang
- Department of Gastrointestinal Surgery, Tianjin First Central Hospital, No.24 Fukang Road, Nankai District, Tianjin, 300190, People's Republic of China
| | - Tao Yang
- Department of Gastrointestinal Surgery, Tianjin First Central Hospital, No.24 Fukang Road, Nankai District, Tianjin, 300190, People's Republic of China
| | - Kewei Meng
- Department of Gastrointestinal Surgery, Tianjin First Central Hospital, No.24 Fukang Road, Nankai District, Tianjin, 300190, People's Republic of China.
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Chen L, Ma X, Dong H, Qu B, Yang T, Xu M, Sheng G, Hu J, Liu A. Construction and assessment of a joint prediction model and nomogram for colorectal cancer. J Gastrointest Oncol 2022; 13:2406-2414. [PMID: 36388680 PMCID: PMC9660088 DOI: 10.21037/jgo-22-917] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 10/18/2022] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND Colorectal cancer (CRC) is one of the most common tumors in the digestive system, and all its risk factors are not yet known. It is important to identify valuable clinical indicators to predict the risk of CRC. METHODS A total of 227 participants, comprising 162 healthy adults and 65 patients diagnosed with CRC at Tianjin Hospital from January 2017 to March 2022, were included in this study. Electrochemiluminescence was adopted to test the expression levels of carcinoembryonic antigen (CEA), carbohydrate antigen 19-9 (CA199). Univariate and multivariate logistic regression analyses were performed to identify independent risk factors for CRC, and a joint prediction model was then constructed. A nomogram was prepared, and the model was later assessed using the receiver operating characteristic curve and calibration curve. RESULTS The univariate analysis showed that there were statistically significant differences between the two groups in terms of smoking (χ2=8.67), fecal occult blood (χ2=119.41), Helicobacter pylori (H. pylori) infection (χ2=30.87), a history of appendectomy (χ2=5.47), serum total bile acid levels (t=19.80), serum CEA levels (t=37.82), serum CA199 levels (t=6.82), and serum ferritin levels (t=54.31) (all P<0.05). The multiple logistic regression analysis showed that smoking, fecal occult blood, H. pylori infection, a history of appendectomy, serum CEA levels, and serum CA199 levels were independent risk factors for CRC (all P<0.05). Based on the above findings, a joint prediction model was constructed, and the area under the receiver operator characteristic (ROC) curve of the model was 0.842. A nomogram and calibration curve was drawn, and the internal validation results indicated that the model had good diagnostic value. CONCLUSIONS Smoking, fecal occult blood, H. pylori infection, a history of appendectomy, serum CEA levels, and serum CA199 levels are independent risk factors for CRC, and the prediction model based on these factors had good predictive ability.
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Affiliation(s)
- Liming Chen
- Department of Anorectal Surgery, Tianjin Hospital, Tianjin, China
| | - Xi Ma
- Department of Anorectal Surgery, Tianjin Hospital, Tianjin, China
| | - Huajiang Dong
- Logistics University of the Chinese People’s Armed Police Force, Tianjin, China
| | - Bo Qu
- Institute of Disaster and Emergency Medicine, Tianjin University, Tianjin, China
| | - Tao Yang
- Department of General Surgery, Tianjin First Central Hospital, Tianjin, China
| | - Min Xu
- Department of General Surgery, Tianjin First Central Hospital, Tianjin, China
| | - Guannan Sheng
- Department of General Surgery, Tianjin First Central Hospital, Tianjin, China
| | - Jun Hu
- Department of Colorectal Cancer Surgery, Tianjin Medical University Cancer Institute and Hospital, the National Clinical Research Center of Cancer and Key Laboratory of Cancer Prevention and Therapy, Tianjin, China
| | - Aidong Liu
- Department of Pathology, Tianjin Hospital, Tianjin, China
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Wang D, Zhou J, Wu Q, Sheng G, Li X, Lu H, Tian J. Enhancement of Medical Students' Performance and Motivation in Pathophysiology Courses: Shifting From Traditional Instruction to Blended Learning. Front Public Health 2022; 9:813577. [PMID: 35155361 PMCID: PMC8826080 DOI: 10.3389/fpubh.2021.813577] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 12/13/2021] [Indexed: 11/29/2022] Open
Abstract
Blended learning is a learning approach that combines face-to-face classroom lectures and e-learning. It has grown rapidly to be commonly used in medical institutions, especially in the local medical universities where there is lack of qualified teachers and instructional materials. Massive open online courses (MOOCs) are the latest revolution in e-learning and provides learners with access to quality educational resources. Nevertheless, there is seldom reports concerning how to effectively integrate MOOCs into blended learning in local universities, as well as the evaluation of knowledge outcomes. In order to achieve this aim, a blended learning approach was carried out in teaching pathophysiology in Guilin Medical University. This blended learning model was based on combination of Chinese University MOOC with case based learning (CBL), as an alternative to conventional learning. The medical students in the 2017 and 2018 classes received the blended learning method, while the medical students in the 2015 class received the traditional classroom instruction. The results showed that students in the 2017 and 2018 performed significantly better than students in the 2015 class at mid-term exam and the final exam. Perception surveys also revealed that both students and teachers had positive attitude toward blended learning, and they shared similar viewpoints of blended learning. A large proportion of students and teachers believed that the blended learning enhanced students' motivation to learn independently, improved their time management skills, and allowed them to experience personalized learning. Also, most students and teachers recognized that Chinese University MOOC provided substantial educational resources suitable for their need. In addition, teachers indicated that the blended learning improved student learning quality, facilitated interaction between teachers and students, and helped them to establish a student-centered model in teaching pathophysiology. Overall, the blended learning method that combines Chinese University MOOC with CBL is effective in enhancing students' achievement and motivation in pathophysiology than the traditional learning method, and helps to strengthen the cultivation of talent in local medical universities.
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Affiliation(s)
- Dan Wang
- Education Evaluation and Faculty Development Center, Guilin Medical University, Guilin, China
| | - Junhai Zhou
- Department of Foreign Languages, Guilin Medical University, Guilin, China
| | - Qiuhui Wu
- Department of Pathophysiology, Guilin Medical University, Guilin, China
| | - Guannan Sheng
- Department of Mathematics and Physics, Guilin Medical University, Guilin, China
| | - Xin Li
- Department of Pathophysiology, Guilin Medical University, Guilin, China
| | - Huiling Lu
- Department of Pathophysiology, Guilin Medical University, Guilin, China
| | - Jing Tian
- Department of Physiology, Guilin Medical University, Guilin, China
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Chernikova D, Garcia-Lloret M, Sheng G. M267 2-YEAR-OLD MALE WITH PROTEIN LOSING ENTEROPATHY CONCERNING FOR ALLERGIC EOSINOPHILIC GASTROENTERITIS AND IMMUNODEFICIENCY. Ann Allergy Asthma Immunol 2021. [DOI: 10.1016/j.anai.2021.08.384] [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: 10/19/2022]
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Mao B, Xu X, Sheng G, Qian W, Li H. Transcriptome comparison among patients, PDX, PDO, PDXO, PDXC and cell lines. Eur J Cancer 2020. [DOI: 10.1016/s0959-8049(20)31151-5] [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: 11/28/2022]
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Jiang W, Meng K, Sheng G, Yang T. MicroRNA-24 inhibits the proliferation, migration and invasion and enhances chemosensitivity of human gastric cancer by targeting DND1. J BUON 2020; 25:1001-1006. [PMID: 32521898] [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: 06/11/2023]
Abstract
PURPOSE Gastric cancer causes significant human mortality and is the fourth prevalent type of cancer across the globe. The gastric cancer treatment is hurdled by late diagnosis due to unavailability of biomarkers, lack of potent therapeutic targets and adverse effects of chemotherapy. Recent reports have indicated that miR-24 acts a tumor suppressor in different cancers. This study explored the role and therapeutic implications of miR-24 in gastric cancer. METHODS Expression analysis was carried out in gastric cancer tissues and cell lines by qRT-PCR. Proliferation rate was monitored by WST-1 assay. Transwell assay was used to determine cell invasion and wound healing assay was used for cell migration. Protein expression analysis was carried out by western blot analysis. RESULTS The results showed that miR-24 was significantly suppressed in gastric cancer tissues and cell lines. Overexpression of miR-24 in SNU-1 gastric cancer cells resulted in decline of proliferation rate in a time-dependent manner. In silico analysis together with the dual luciferase assay revealed RNA binding protein DND1 to be the target of miR-24. Expression analysis of DND1 was found to be significantly overexpressed in gastric cancer tissues and cell lines. Suppression of DND1 suppressed the proliferation of gastric cancer cells. Wound healing and transwell assay revealed that miR-24 overexpression also inhibited the migration and invasion and also enhanced the chemosensitivity of the SNU1 gastric cancer cells. CONCLUSION Taken together, miR-24 may prove to be an important therapeutic target for the treatment of gastric cancer and warrants further studies.
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Affiliation(s)
- Wei Jiang
- Department of General Surgery, Tianjin First Central Hospital, tianjin 300192, China
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Qu B, Sheng G, Guo L, Yu F, Chen G, Lu Q, Wang R, Han B, Lu Y. MIG7 is involved in vasculogenic mimicry formation rendering invasion and metastasis in hepatocellular carcinoma. Oncol Rep 2017; 39:679-686. [PMID: 29251318 DOI: 10.3892/or.2017.6138] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2016] [Accepted: 11/16/2017] [Indexed: 11/05/2022] Open
Abstract
Migration-inducing gene 7 (MIG7) is highly expressed and is implicated in multiple malignant tumors with vasculogenic mimicry (VM) which renders possible routes without the endothelium for invasion and metastasis. However, there are few reports in the literature describing the relationship between MIG7 expression and VM formation in hepatocellular carcinoma (HCC). In the present study, we found a significantly positive correlation between MIG7 expression and VM in 40 HCC specimens. Three-dimensional (3D) culture showed that VM formation in the HCC cell line MHCC-97H with high metastatic potential was enhanced to a greater extent than that of MHCC-97L and Huh-7 with low and non-metastatic potential. There was no VM formation in human normal hepatocyte line L-02. Moreover, MIG7 expression was higher in MHCC-97H than in MHCC-97L and Huh-7 cells and non-detectable in L-02 cells. MIG7 knockdown in MHCC-97H cells reduced VM formation, and weakened the invasive properties accompanying the enhanced cellular adhesion. Notably, there was no significant effect of endostatin (ES), a broad-spectrum angiogenesis inhibitor applied to clinical treatment, on both MIG7 expression and VM formation. Thus, the present study presents a causal link between MIG7 expression and VM formation in HCC, suggesting a potential treatment target for invasion and metastasis.
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Affiliation(s)
- Bo Qu
- Department of Oncological Surgery, Affiliated Hospital of the Logistics University of Chinese People's Armed Police Forces, Tianjin 300162, P.R. China
| | - Guannan Sheng
- Department of Oncological Surgery, Postgraduate Training Basement of Jinzhou Medical University in the Affiliated Hospital of the Logistics University of Chinese People's Armed Police Forces, Tianjin 300162, P.R. China
| | - Long Guo
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Fei Yu
- Department of Oncological Surgery, Postgraduate Training Basement of Jinzhou Medical University in the Affiliated Hospital of the Logistics University of Chinese People's Armed Police Forces, Tianjin 300162, P.R. China
| | - Guannan Chen
- Department of Oncological Surgery, Postgraduate Training Basement of Jinzhou Medical University in the Affiliated Hospital of the Logistics University of Chinese People's Armed Police Forces, Tianjin 300162, P.R. China
| | - Qi Lu
- Institute of Disaster Medicine and Public Health, Affiliated Hospital of the Logistic University of Chinese People's Armed Police Force, Tianjin 300162, P.R. China
| | - Renjie Wang
- Department of clinical Laboratory, Affiliated Hospital of the Logistics University of Chinese People's Armed Police Forces, Tianjin 300162, P.R. China
| | - Bing Han
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
| | - Yi Lu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China
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Qu B, Guo L, Sheng G, Yu F, Chen G, Wang Y, Shi Y, Zhan H, Yang Y, Du X. Management of Advanced Hepatic Alveolar Echinococcosis: Report of 42 Cases. Am J Trop Med Hyg 2017; 96:680-685. [PMID: 28070011 PMCID: PMC5361545 DOI: 10.4269/ajtmh.16-0557] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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: 07/07/2016] [Accepted: 11/18/2016] [Indexed: 12/27/2022] Open
Abstract
Radical resection is the first choice for hepatic alveolar echinococcosis (HAE). However, many patients with advanced HAE have no chance to be treated with curative resection owing to the long clinical latency. This study aimed to evaluate the necessity of aggressive operations, like palliative resection and orthotopic liver transplantation (OLT), in the management of advanced HAE. A retrospective study analyzed 42 patients with advanced HAE treated with palliative resection (N = 15), palliative nonresective procedures (N = 13), OLT (N = 3), or albendazole therapy alone (N = 11). The patients' condition before treatments was comparable among all the four groups. The overall 1-year, 3-year, and 5-year survival rates of the 42 cases were 81.0%, 45.2%, and 23.8%, respectively. No event occurred to end the follow-up during the 5-year observation period except death. The survival time (median ± standard error) of the palliative resection group (3.6 ± 1.4 years) was longer than that of the palliative nonresective procedures group (1.5 ± 0.2) and the albendazole therapy-alone group (1.0 ± 0.4). The 5-year survival rates after palliative resection and liver transplantation were 40.0% and 66.7%, compared with only 7.7% and 9.1% after palliative nonresective procedures or albendazole therapy alone. Therefore, we concluded that aggressive treatment with a multimodality strategy could contribute to prolonged survival in patients with advanced HAE. Moreover, the prognosis of the patients who received albendazole therapy alone or palliative nonresective procedures is poor.
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Affiliation(s)
- Bo Qu
- Department of General Surgery, Affiliated Hospital of Logistics University of Chinese People's Armed Police Forces, Logistics University of Chinese People's Armed Police Forces, Tianjin, People's Republic of China
| | - Long Guo
- Department of Hepatobiliary Surgery, Liver Transplantation Center, The First Affiliated Hospital of Medical College, Xi'an Jiaotong University, Shaanxi, People's Republic of China
| | - Guannan Sheng
- Department of General Surgery, Postgraduate Training Basement of Jinzhou Medical University, Affiliated Hospital of Logistics University of Chinese People's Armed Police Forces, Tianjin, People's Republic of China
| | - Fei Yu
- Department of General Surgery, Postgraduate Training Basement of Jinzhou Medical University, Affiliated Hospital of Logistics University of Chinese People's Armed Police Forces, Tianjin, People's Republic of China
| | - Guannan Chen
- Department of General Surgery, Postgraduate Training Basement of Jinzhou Medical University, Affiliated Hospital of Logistics University of Chinese People's Armed Police Forces, Tianjin, People's Republic of China
| | - Yupeng Wang
- Department of Oncology, Tianjin Beichen Hospital, Tianjin, People's Republic of China
| | - Yuan Shi
- Department of Hepatobiliary Surgery, Organ Transplantation Center, Tianjin First Center Hospital, Tianjin, People's Republic of China
| | - Hanxiang Zhan
- Department of Hepatobiliary Surgery, Qilu Hospital of Shandong University, Jinan, People's Republic of China
| | - Yi Yang
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Medical College, Xi'an Jiaotong University, Xi'an, People's Republic of China
| | - Xiaoyan Du
- Department of Hematology, Peking University Third Hospital, Peking University, Beijing, People's Republic of China
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Li X, Sheng G, Xing H. Relationships among HLA-DRB1 Alleles, Helicobacter pylori infection and idiopathic thrombocytopenic purpura in children. Minerva Pediatr 2015; 67:377-379. [PMID: 26129806] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Affiliation(s)
- X Li
- Department of Pediatrics, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province, China -
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Wang Y, Yin C, Feng L, Wang C, Sheng G. Ara-C and anti-CD47 antibody combination therapy eliminates acute monocytic leukemia THP-1 cells in vivo and in vitro. Genet Mol Res 2015; 14:5630-41. [DOI: 10.4238/2015.may.25.15] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Yang JC, He Q, Suresha SJ, Kuo CY, Peng CY, Haislmaier RC, Motyka MA, Sheng G, Adamo C, Lin HJ, Hu Z, Chang L, Tjeng LH, Arenholz E, Podraza NJ, Bernhagen M, Uecker R, Schlom DG, Gopalan V, Chen LQ, Chen CT, Ramesh R, Chu YH. Orthorhombic BiFeO3. Phys Rev Lett 2012; 109:247606. [PMID: 23368382 DOI: 10.1103/physrevlett.109.247606] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Revised: 09/07/2012] [Indexed: 05/12/2023]
Abstract
A new orthorhombic phase of the multiferroic BiFeO3 has been created via strain engineering by growing it on a NdScO(3)(110)(o) substrate. The tensile-strained orthorhombic BiFeO3 phase is ferroelectric and antiferromagnetic at room temperature. A combination of nonlinear optical second harmonic generation and piezoresponse force microscopy revealed that the ferroelectric polarization in the orthorhombic phase is along the in-plane {110}(pc) directions. In addition, the corresponding rotation of the antiferromagnetic axis in this new phase was observed using x-ray linear dichroism.
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Affiliation(s)
- J C Yang
- Department of Materials Science and Engineering, National Chiao Tung University, Hsinchu 300, Taiwan
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14
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Sheng G, Wang C, Bai S, Zhao X, Zou X. 104 An analysis of 101 cases of myelodysplastic syndrome in children. Leuk Res 2011. [DOI: 10.1016/s0145-2126(11)70106-0] [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: 10/18/2022]
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15
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Pan X, Du W, Yu X, Sheng G, Cao H, Yu C, Lv G, Huang H, Chen Y, Li J, Li L. Establishment and Characterization of Immortalized Porcine Hepatocytes for the Study of Hepatocyte Xenotransplantation. Transplant Proc 2010; 42:1899-906. [DOI: 10.1016/j.transproceed.2009.11.043] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2009] [Accepted: 11/23/2009] [Indexed: 10/19/2022]
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16
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Zeches RJ, Rossell MD, Zhang JX, Hatt AJ, He Q, Yang CH, Kumar A, Wang CH, Melville A, Adamo C, Sheng G, Chu YH, Ihlefeld JF, Erni R, Ederer C, Gopalan V, Chen LQ, Schlom DG, Spaldin NA, Martin LW, Ramesh R. A strain-driven morphotropic phase boundary in BiFeO3. Science 2010; 326:977-80. [PMID: 19965507 DOI: 10.1126/science.1177046] [Citation(s) in RCA: 320] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Piezoelectric materials, which convert mechanical to electrical energy and vice versa, are typically characterized by the intimate coexistence of two phases across a morphotropic phase boundary. Electrically switching one to the other yields large electromechanical coupling coefficients. Driven by global environmental concerns, there is currently a strong push to discover practical lead-free piezoelectrics for device engineering. Using a combination of epitaxial growth techniques in conjunction with theoretical approaches, we show the formation of a morphotropic phase boundary through epitaxial constraint in lead-free piezoelectric bismuth ferrite (BiFeO3) films. Electric field-dependent studies show that a tetragonal-like phase can be reversibly converted into a rhombohedral-like phase, accompanied by measurable displacements of the surface, making this new lead-free system of interest for probe-based data storage and actuator applications.
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Affiliation(s)
- R J Zeches
- Department of Materials Science and Engineering, University of California, Berkeley, Berkeley, CA 94720, USA.
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Sheng J, Li J, Sheng G, Yu H, Huang H, Cao H, Lu Y, Deng X. Characterization ofrpoBmutations associated with rifampin resistance inMycobacterium tuberculosisfrom eastern China. J Appl Microbiol 2008; 105:904-11. [DOI: 10.1111/j.1365-2672.2008.03815.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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18
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Ringrose A, Zhou Y, Pang E, Zhou L, Lin AEJ, Sheng G, Li XJ, Weng A, Su MW, Pittelkow MR, Jiang X. Evidence for an oncogenic role of AHI-1 in Sezary syndrome, a leukemic variant of human cutaneous T-cell lymphomas. Leukemia 2006; 20:1593-601. [PMID: 16838023 DOI: 10.1038/sj.leu.2404321] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [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: 12/23/2022]
Abstract
Ahi-1 (Abelson helper integration site 1) is a novel gene frequently activated by provirus insertional mutagenesis in murine leukemias and lymphomas. Its involvement in human leukemogenesis is demonstrated by gross perturbations in its expression in human leukemia cells, particularly in cutaneous T-cell lymphoma cell lines where increases in AHI-1 transcripts of 40-fold are seen. To test directly whether deregulated expression of AHI-1 contributes to their transformed properties, knockdown of AHI-1 expression in Hut78 cells, a cell line derived from a patient with Sezary syndrome (SS), was performed using retroviral-mediated RNA interference. Retroviral-mediated suppression specifically inhibited expression of AHI-1 and its isoforms in transduced cells by 80% and also reduced autocrine production of interleukin (IL)-2, IL-4 and tumor necrosis factor-alpha (TNFalpha) by up to 85%. It further significantly reduced their growth factor independence in vitro and the ability to produce tumors in immunodeficient mice. Interestingly, aberrant expression of AHI-1, particularly truncated isoforms, was present in CD4+CD7- Sezary cells from some patients with SS. Elevated expression of IL-2 and TNFalpha was also found in these cells. These findings provide strong evidence of the oncogenic activity of AHI-1 in human leukemogenesis and demonstrate that its deregulation may contribute to the development of SS.
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Affiliation(s)
- A Ringrose
- Terry Fox Laboratory, British Columbia Cancer Agency, Vancouver, British Columbia, Canada
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19
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Johnston CT, Sheng G, Teppen BJ, Boyd SA, de Oliveira MF. Spectroscopic study of dinitrophenol herbicide sorption on smectite. Environ Sci Technol 2002; 36:5067-5074. [PMID: 12523422 DOI: 10.1021/es025760j] [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] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Sorption of two dinitrophenolic herbicides, 4,6-dinitro-o-cresol (DNOC) and 4,6-dinitro-2-sec-butylphenol (DINOSEB) to smectite was studied using FTIR, HPLC, and quantum chemical methods. The high affinity of DNOC and DINOSEB for smectite surfaces was attributed to site-specific interactions with exchangeable cations and nonspecific van der Waals interactions with the siloxane surface. The positions of the nu(asym)(NO) and nu(sym)(NO) vibrational modes were perturbed by the exchangeable cations with similar changes occurring for both alkali and alkaline earth cations as a function of ionic potential. The cation-induced changes to the vibrational bands of the NO2 groups indicate that exchangeable metal cations are coordinated to -NO2 groups. Quantum chemical methods predicted a red-shift of the nu(asym)(NO) band and a corresponding blue-shift of the nu(sym)(NO) modes, as was observed experimentally. The nature of the smectite surface itself did not strongly influence the vibrational modes of sorbed DNOC or DINOSEB on the basis of a comparison of DNOC sorbed to three different smectites (K-SWy-2, K-SAz-1, and K-SHCa-1). FTIR spectra of DNOC and DINOSEB sorbed to a K-SWy-2 smectite were studied quantitatively using a modified form of Beers law. The FTIR-derived sorption isotherm of DNOC sorbed to K-SWy-2 was in good agreement with the isotherm derived from HPLC measurements. The molar absorptivity value of DNOC sorbed to K-SWy-2 smectite was 1.43 x 10(7) cm2/mol in good agreement with literature values for nitroaromatics (average value of 1.72 x 10(7) +/- 0.3 cm2/mol). On the basis of this value, the limit of detection using the FTIR method of approximately 5 microgDNOC g(clay) was determined. These two observations (sorption isotherms and molar absorptivity) provide a direct link between the macroscopic sorption results and the FTIR spectra.
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Affiliation(s)
- C T Johnston
- Department of Crop, Soil and Environmental Sciences, 1150 Lilly Hall, Purdue University, West Lafayette, Indiana 47907-1150, USA.
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Johnston CT, de Oliveira MF, Teppen BJ, Sheng G, Boyd SA. Spectroscopic study of nitroaromatic-smectite sorption mechanisms. Environ Sci Technol 2001; 35:4767-4772. [PMID: 11775151 DOI: 10.1021/es010909x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Sorption mechanisms of 1,3- and 1,4-dinitrobenzene, 1,3,5-trinitrobenzene (TNB), dinitro-o-creasol, and 6-sec-butyl-2,4-dinitrophenol (DINOSEB) on smectite were investigated using FTIR spectroscopy and HPLC methods. A quantitative method was developed that established a direct link between the HPLC and the FTIR data. Freundlich sorption values ranged from 47 (L g(-1)) for 1,3,5-TNB to 3.7 for DINOSEB and showed that the extent of nitroaromatic compounds (NAC) sorption was strongly dependent on the number and position of the nitro substituents as well as other substituents and steric effects. The amount of 1,3,5-TNB sorbed to smectite was strongly influenced by the nature of the exchangeable cation. Furthermore, the exchangeable cation significantly influenced the positions and relative intensities of the vibrational modes of the -NO2 groups. The strongest perturbations were observed for cations with lower enthalpies of hydration (e.g., K+) and included a red shift of the v(asym)(NO) band, a concomitant blue shift of the v(sym)(NO) band. These changes were accompanied by a 2-fold increase in the relative intensity of the v(asym)(NO) band relative to the intensity of the v(sym) (NO) band. Molecular quantum mechanics calculations were used to rationalize frequency shifts in terms of nitroaromatic interactions with interlayer cations. Results indicate that the sorption of NACs to smectite surfaces is controlled largely by the hydration characteristics of the exchangeable cation, which regulates both cation-nitroaromatic complexation and swelling of the smectite.
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Affiliation(s)
- C T Johnston
- Crop, Soil and Environmental Sciences, Purdue University, West Lafayette, Indiana 47907-1150, USA.
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21
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Boyd SA, Sheng G, Teppen BJ, Johnston CT. Mechanisms for the adsorption of substituted nitrobenzenes by smectite clays. Environ Sci Technol 2001; 35:4227-4234. [PMID: 11718335 DOI: 10.1021/es010663w] [Citation(s) in RCA: 93] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
To more fully understand the potential for transport of nitroaromatic compounds in soils and subsoils,the adsorption of a series of para- and meta-substituted nitrobenzenes (SNBs) by K-smectite clay was measured. Adsorption isotherms were fit to the Freundlich equation, and the resultant Freundlich adsorption coefficients (log(Kf) were positively correlated with the Hammett substituent constant (r2 = 0.80). This relationship and a positive reaction constant (p = 1.15) indicate that the adsorption reaction is favored by electron-withdrawing substituents. These results are consistent with an electron donor (smectite)-acceptor (substituted nitrobenzene) mechanism offered previously. However, quantum calculations did not reveal any systematic relationship between the Hammett constant and the electron density on the aromatic ring, which would explain a donor-acceptor relationship. Rather, electron density donated by a second substituent on nitrobenzene appears to be appropriated by the nitro group leaving ring electron density unchanged. Fourier transform infrared spectroscopy revealed shifts in the -NO2 vibrational modes of 1,3,5-trinitrobenzene (TNB) upon adsorption to K+-smectite that were consistent with the complexation of K+ by -NO2 groups. Such TNB vibrational shifts were not observed for SWy-1 saturated with more strongly hydrated cations (i.e., Na+, Mg2+, Ca2+, and Ba2+). The simultaneous interaction of multiple -NO2 groups with exchangeable K+ was indicated by molecular dynamic simulations. Adsorption of SNBs by smectite clays appears to result from the additive interactions of -NO2 groups and secondary substituents with interlayer K+ ions. Adsorption occurs to a greater or lesser extent depending on the abilities of substituents to complex additional interlayer cations and the water solubilities of SNBs. We conclude that the adsorption trends of SNBs on K-SAz-1 can be explained without recourse to hypothetical electron donor-acceptor complexes.
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Affiliation(s)
- S A Boyd
- Department of Crop and Soil Sciences, Michigan State University, East Lansing 48824, USA.
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22
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Sheng G, Johnston CT, Teppen BJ, Boyd SA. Potential contributions of smectite clays and organic matter to pesticide retention in soils. J Agric Food Chem 2001; 49:2899-2907. [PMID: 11409985 DOI: 10.1021/jf001485d] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Soil organic matter (SOM) is often considered the dominant sorptive phase for organic contaminants and pesticides in soil-water systems. This is evidenced by the widespread use of organic-matter-normalized sorption coefficients (K(OM)) to predict soil-water distribution of pesticides, an approach that ignores the potential contribution of soil minerals to sorption. To gain additional perspective on the potential contributions of clays and SOM to pesticide retention in soils, we measured sorption of seven pesticides by a K-saturated reference smectite clay (SWy-2) and SOM (represented by a muck soil). In addition, we measured the adsorption of atrazine by five different K-saturated smectites and Ca-saturated SWy-2. On a unit mass basis, the K-SWy-2 clay was a more effective sorbent than SOM for 4,6-dinitro-o-cresol (DNOC), dichlobenil, and carbaryl of the seven pesticides evaluated, of which, DNOC was sorbed to the greatest extent. Atrazine was sorbed to a similar extent by K-SWy-2 and SOM. Parathion, diuron, and biphenyl were sorbed to a greater extent by SOM than by K-SWy-2. Atrazine was adsorbed by Ca-SWy-2 to a much lesser extent than by K-SWy-2. This appears to be related to the larger hydration sphere of Ca(2+) (compared to that of K(+)) which shrinks the effective size of the adsorption domains between exchangeable cations, and which expands the clay layers beyond the apparently optimal spacing of approximately 12.2 A for sorption of aromatic pesticide structures. Although a simple relation between atrazine adsorption by different K-smectites and charge properties of clay was not observed, the highest charge clay was the least effective sorbent; a higher charge density would result in a loss of adsorption domains. These results indicate that for certain pesticides, expandable soil clays have the potential to be an equal or dominant sorptive phase when compared to SOM for pesticide retention in soil.
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Affiliation(s)
- G Sheng
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72701, USA
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23
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Abstract
Three kinds of soils were modified with the cationic surfactants, hexadecyltrimethylammonium (HDTMA) bromide and tetramethylammonium (TMA) bromide to increase their sorptive capabilities. Sorption of chlorobenzene in simulated groundwater by these soils was investigated. HDTMA-modified soil has a higher ability to sorb chlorobenzene from simulated groundwater than unmodified soil. TMA-modified soil did not show the superiority. HDTMA thus can be used to modify soil to improve its sorption capability. Cosorption of chlorobenzene in simulated groundwater in the absence or presence of nitrobenzene and dichloromethane on HDTMA-modified soil was also investigated. Nitrobenzene facilitated sorption of chlorobenzene on all HDTMA-modified soil. Dichloromethane did not influence the sorption of chlorobenzene by HDTMA-modified soil. The results suggest that HDTMA-modified soil is a highly effective sorbent for chlorobenzene and multiple organic compounds did not impede the uptake of chlorobenzene.
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Affiliation(s)
- B Gao
- Department of Environmental Science and Engineering, Nanjing University, People's Republic of China
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Chiou CT, Sheng G, Manes M. A partition-limited model for the plant uptake of organic contaminants from soil and water. Environ Sci Technol 2001; 35:1437-44. [PMID: 11348082 DOI: 10.1021/es0017561] [Citation(s) in RCA: 219] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
In dealing with the passive transport of organic contaminants from soils to plants (including crops), a partition-limited model is proposed in which (i) the maximum (equilibrium) concentration of a contaminant in any location in the plant is determined by partition equilibrium with its concentration in the soil interstitial water, which in turn is determined essentially by the concentration in the soil organic matter (SOM) and (ii) the extent of approach to partition equilibrium, as measured by the ratio of the contaminant concentrations in plantwater and soil interstitial water, alphapt (< or = 1), depends on the transport rate of the contaminant in soil water into the plant and the volume of soil water solution that is required for the plant contaminant level to reach equilibrium with the external soil-water phase. Through reasonable estimates of plant organic-water compositions and of contaminant partition coefficients with various plant components, the model accounts for calculated values of alphapt in several published crop-contamination studies, including near-equilibrium values (i.e., alphapt approximately equals 1) for relatively water-soluble contaminants and lower values for much less soluble contaminants; the differences are attributed to the much higher partition coefficients of the less soluble compounds between plant lipids and plant water, which necessitates much larger volumes of the plant water transport for achieving the equilibrium capacities. The model analysis indicates that for plants with high water contents the plant-water phase acts as the major reservoir for highly water-soluble contaminants. By contrast, the lipid in a plant, even at small amounts, is usually the major reservoir for highly water-insoluble contaminants.
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Affiliation(s)
- C T Chiou
- U.S. Geological Survey, Denver Federal Center, Colorado 80225, USA.
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25
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Shen Y, Fu J, Sheng G, Wei C. [Analysis of toxic organic compounds in MGP-Wastewater and investigation of Wastewater's general characteristics]. Huan Jing Ke Xue 2001; 22:109-13. [PMID: 11382029] [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: 02/20/2023]
Abstract
A full-scale investigation and analysis of MGP(Manufacture Gas from Petroleum)-Wastewater was carried out in this study. It's the first time that this paper publicizes the wastewater's general data, pretreatment method of GC/MS analysis and compositions of toxic organic compounds. The concentrtion of wastewater's CODCg, BOD5, phenolic, N-NH4+ and extractive-organic is: 400 mg.L(-1)-600 mg.L-1, 60 mg.L(-1)-80 mg.L-1, 20 mg.L(-1)-30 mg.L-1, 60 mg.L(-1)-80 mg.L-1 and 170 mg.L(-1)-200 mg.L-1 respectively. There are 79 kinds of aromatic compounds were detected by GC/MS, the total concentration of influent and effluent is 140.79 mg.L-1 and 129.11 mg.L-1 respectively. The data approved that MGP-wastewater is toxic and difficult for bio-treatment.
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Affiliation(s)
- Y Shen
- SKLOG, Guangzhou Institute of Geochemistry, Chine Acaderny of Sciences, Guangzhou 510640, China.
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26
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Kang Y, Sheng G, Fu J, Wang Z. Deposition record of organochlorine pesticides in a sedimentary core in Macao Estuary, Pearl River, China. J Environ Sci Health A Tox Hazard Subst Environ Eng 2001; 36:1873-1890. [PMID: 11759902 DOI: 10.1081/ese-100107435] [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] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
This paper present the concentration profiles of the organochlorine pesticides in a sediment core from Macao Estuary, Pearl River, China. Concentrations of organochlorine pesticides were determined by GC/ ECD and GC/MSD, and the core was dated by 210Pb method in a content-activity model. The results show that the concentrations of HCHs and DDTs in the core ranged from 0.48-26.3 and 1.92-39.1 microg/kg, respectively. Concentration of DDTs in the research area was above the Effects Range-Low value (ERL) for Marine and Estuarine sediments. The vertical distributing of organochlorine pesticides in the core was influenced by the water flux of Pearl River and the pollutants are mainly attributed to the runoff of local agricultural soils.
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Affiliation(s)
- Y Kang
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, PR China.
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27
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Kang Y, Sheng G, Fu J, Mai B, Zhang G. [Vertical distribution characteristics of organochlorinated pesticides in sediment core from Macao estuary, Pearl River delta]. Huan Jing Ke Xue 2001; 22:81-5. [PMID: 11382051] [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: 02/20/2023]
Abstract
This work presents the analysis result of concentration for organochlorinated pesticides in a sedimentary core sample. Pesticides were quantified by GC/ECD with the internal standard material. The core dated by 210Pb methods. The vertical distribution of pesticides concentration with the depth was discussed. The results showed the concentration of BHCs and DDTs in the core ranged from 0.48 ng/g to 26.28 ng/g and 1.92-39.13 ng/g respectively. The distributing characteristics of organochlorinated pesticides in the core varied with the water fluxes of Pearl River. Organochlorinated pesticides may come from the residue of agricultural soils. Concentration of DDTs was above the effects range-low value for marine and estuarine sediments.
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Affiliation(s)
- Y Kang
- State Key Laboratory of Organic Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
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Yu Z, Sheng G, Fu J, Peng P. Determination of porphyrin carbon isotopic composition using gas chromatography-isotope ratio monitoring mass spectrometry. J Chromatogr A 2000; 903:183-91. [PMID: 11153940 DOI: 10.1016/s0021-9673(00)00898-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Carbon isotopic compositions of aetio I occurring in the form of free-base, nickel, demetallation, dihydroxysilicon(IV) and bis(tert.-butyldimethylsiloxy)silicon(IV) [(tBDMSO)2Si(IV)] have shown that it has experienced no obvious isotope fractionation during the synthesis of [(tBDMSO)2Si(IV)] porphyrin from aetio I. Here, aetio I porphyrin species such as free-base, nickel, demetallated and dihydroxysilicon were analyzed by the conventional method, namely it is combusted in sealed system, and followed by isotope ratio monitoring mass spectrometric analysis. [(tBDMSO)2Si(IV)] aetio I was assayed by gas chromatography-isotope ratio monitoring mass spectrometry (GC-IRMS). A porphyrin mixture of [(tBDMSO)2Si(IV)] aetio I and octaethylporphyrin was also prepared. Their carbon isotopic compositions measured by GC-IRMS indicate that no isotope exchange took place between the porphyrins during the synthesis of [(tBDMSO)2Si(IV)] porphyrins. This method is employed for delta13C determination of geoporphyrins from the Maoming and Jianghan oil shales.
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Affiliation(s)
- Z Yu
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences
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Gao B, Yang L, Wang X, Zhao J, Sheng G. Influence of modified soils on the removal of diesel fuel oil from water and the growth of oil degradation micro-organism. Chemosphere 2000; 41:419-426. [PMID: 11057604 DOI: 10.1016/s0045-6535(99)00287-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Three soils were modified with two kinds of cationic surfactants in order to increase their sorptive capabilities for organic contaminants. Sorption of diesel fuel oil in water by these modified soils had been investigated. Modified soils can effectively sorb diesel fuel oil from water. The sorption capability of modified soils is: HDTMA-black soil > HDTMA-yellow brown soil > HDTMA-red soil > TMA-black soil > TMA-yellow brown soil > TMA-red soil. Sorption of diesel fuel oil by natural soils and HDTMA modified soils is via partition, the sorption isotherms can be expressed by Henry equation, and logK(SOM) is 2.42-2.80, logK(HDTMA) is 3.37-3.60. Sorption isotherms of TMA modified soils can be expressed by Langmuir equation, the saturation sorption capacities are 1150 (TMA-black soil), 750 (TMA-yellow-brown soil), 171 mg/kg (TMA-red soil), respectively. A diesel fuel oil degradation micro-organism (Pseudomonas sp.) was isolated in the lab. To test the influence of the modified soils on the micro-organism, various growth curves of Pseudomonas in different conditions were drawn. Pseudomonas can grow very well with natural soils and TMA modified soils. The acclimation period of Pseudomonas is reduced. As to HDTMA modified soils, HDTMA loading amount is very important. When HDTMA loading amount is no higher than 0.5 CEC, the micro-organism can grow very well after a long acclimation period.
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Affiliation(s)
- B Gao
- State Key Laboratory of Pollution Control and Resource Reuse, Department of Environmental Science and Engineering, Nanjing University, People's Republic of China
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30
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Abstract
Fullerenes-extracted soot (FES) is the by-product of fullerenes production. Retention characteristics at different temperatures for 17 volatile organic compounds (VOCs) on FES are measured. The adsorption and desorption efficiencies for VOCs on FES adsorbent tubes range from 40.8 to 117%, most of them being 100+/-20%. The values are compared with Tenax GR, an adsorbent commonly used in environmental analysis. FES can be used as an adsorbent of low cost to collect VOCs in environmental samples.
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Affiliation(s)
- C Chen
- State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Science
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31
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Abstract
We have investigated in detail the expression patterns of two Gata genes, cGata2 and cGata3, during early chick development. In addition to confirming previously described expression of these two genes in developing brain, kidney and blood islands, this study reveals several important novel expression domains during very early stages of development. cGata2 is expressed in the area opaca in pre-primitive streak stages, forming a gradient along the A-P axis (strongest anteriorly). Both genes are expressed strongly in the entire non-neural ectoderm from stage 4+, and neither is expressed in prospective neural plate at any stage. Unlike other previously described non-neural markers, neither gene is expressed in the dorsal neural tube. We also describe dynamic expression of cGata2 and cGata3 during eye, ear and gut development.
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Affiliation(s)
- G Sheng
- Department of Genetics and Development, Columbia University, 701 West 168th Street #1602, New York, New York 10032, USA
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Wu Q, Shiraiwa Y, Takeda H, Sheng G, Fu J. Liquid-Saturated Hydrocarbons Resulting from Pyrolysis of the Marine Coccolithophores Emiliania huxleyi and Gephyrocapsa oceanica. Mar Biotechnol (NY) 1999; 1:346-352. [PMID: 10489410 DOI: 10.1007/pl00011785] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
: Two nanoplanktonic marine coccolithophores, Emiliania huxleyi and Gephyrocapsa oceanica, were grown at 23 degrees C with a 16-hour light and 8-hour darkness regimen. The cells were dried at room temperature and then subjected to pyrolysis at 100 degrees to 500 degrees C under anoxygenic conditions to produce hydrocarbons. Temperature-dependent profiles of the liquid-saturated hydrocarbons (saturates) produced during pyrolysis were very similar for the two strains, although the total amount was higher in E. huxleyi than in G. oceanica. The amount of saturates produced was only 0.05% to 0.15% below 200 degrees C, but about 2.1% to 2.8% at 300 degrees C. Their major components were normal alkanes in a series ranging from nC(11) to nC(35) with the predominant peak at nC(15). At 400 degrees and 500 degrees C most of saturates transformed into gaseous compounds. The major saturates identified in all pyrolysates were normal C(31) monounsaturated and diunsaturated alkenes, a series of normal alkanes, phytenes, C(28) sterenes, and steranes. Profiles of saturates in gas chromatography-mass spectroscopy varied with increasing pyrolysis temperature and also differed between E. huxleyi and G. oceanica. The two coccolithophores are useful candidates for the production of renewable liquid fuel through pyrolysis-especially E. huxleyi, which has higher production. The results also provide information for further studies on the characterization, source, and paleogeographic distribution of marine sediment.
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Affiliation(s)
- Q Wu
- Department of Biological Sciences and Biotechnology, Tsinghua University, Beijing 100084, P.R. China
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Sun H, Liu W, Shao J, Xu H, Xiao K, Sheng G. Study on immunoregulation by interleukin-1 receptor antagonist in NZB/W F mice. J Tongji Med Univ 1998; 17:18-20, 24. [PMID: 9639778 DOI: 10.1007/bf02887995] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The immunoregulating effect of Interleukin-1-receptor antagonist (IL-1ra) in lupus-like NZB/W F1 mice was investigated to find possible approach to prevent lupus nephritis. 12 female NZB/W F1 mice of 13 weeks were randomly divided into 2 groups. Each mouse in the treated group was intraperitoneally injected with IL-1ra once every 2 weeks for 3 times at the dosage of 100 micrograms each time, while the control group was given injection of 0.1 ml normal saline. All the mice were killed at the age of 9 months and the immunologic function was examined. Results showed that this dosage could not completely prevent the development of lupus nephritis, but the renal damage was alleviated and the urine protein was decreased. Moreover, it could improve the immunofunction by significantly reducing the levels of serum IL-1 and obviously increase the activities of NK cells and IL-2 induced by ConA in mononuclear cells of spleen. There was no significant difference in the levels of serum IL-6 and TNF-alpha between the treated group and control group. It is concluded that IL-1ra has certain regulatory effect on the immunologic function of lupus-like NZB/W F1 mice.
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Affiliation(s)
- H Sun
- Department of Internal Medicine, Tongji Hospital, Tongji medical University, Wuhan
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Abstract
Specificity in transcriptional regulation lies in a large part in the specificity of DNA binding by transcription factors. One group of transcription factors which are of great interest for studying transcriptional specificity is the Pax/Homeodomain (Pax/HD) proteins which contain two conserved DNA binding domains, a paired domain (PD) and a Paired-class homeodomain (HD). The Pax/HD proteins can bind to at least three types of specific DNA sequences: the PD binding sites, the dimeric HD binding sites and a composite HD and PD binding site. We propose that Pax/HD proteins regulate different subsets of their target genes through modular binding to one of these three specific sequences. We show that, in a tissue culture system, a member of the Pax/HD family, Paired, is able to activate transcription after binding through either its PD or its HD. The transactivation mediated by one domain does not require DNA binding of the other domain. Furthermore, binding sites specific for the PD of Paired are sufficient to mediate embryonic expression of a reporter gene in a paired-like pattern. The expression of the reporter gene is dependent on wild type paired function and, in a prd mutant background, it can be rescued by an exogenous paired gene encoding a protein whose HD is not able to bind to DNA. Finally, we show that the Paired protein uses differently its C-terminal activation domain when transactivation is mediated through its PD or its HD. These results and recent evidence from other Pax/HD proteins strongly suggest that this class of proteins is able to achieve specific and modular transcriptional regulation through its multiple DNA binding domains.
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Affiliation(s)
- G Sheng
- Laboratory of Molecular Genetics, Howard-Hughes-Medical-Institute, Rockefeller University, New York, USA
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Sheng G, Thouvenot E, Schmucker D, Wilson DS, Desplan C. Direct regulation of rhodopsin 1 by Pax-6/eyeless in Drosophila: evidence for a conserved function in photoreceptors. Genes Dev 1997; 11:1122-31. [PMID: 9159393 DOI: 10.1101/gad.11.9.1122] [Citation(s) in RCA: 132] [Impact Index Per Article: 4.9] [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: 02/04/2023]
Abstract
Pax-6 is a transcription factor containing both a homeodomain (HD) and a Paired domain (PD). It functions as an essential regulator of eye development in both Drosophila and vertebrates, suggesting an evolutionarily conserved origin for different types of metazoan eyes. Classical morphological and phylogenetic studies, however, have concluded that metazoan eyes have evolved many times independently. These apparently contradictory findings may be reconciled if the evolutionarily ancient role of Pax-6 was to regulate structural genes (e.g., rhodopsin) in primitive photoreceptors, and only later did it expand its function to regulate the morphogenesis of divergent and complex eye structures. In support of this, we present evidence that eyeless (ey), which encodes the Drosophila homolog of Pax-6, directly regulates rhodopsin 1 (rh1) expression in the photoreceptor cells. We detect ey expression in both larval and adult terminally differentiated photoreceptor cells. We show that the HD of Ey binds to a palindromic HD binding site P3/RCS1 in the rh1 promoter, which is essential for rh1 expression. We further demonstrate that, in vivo, P3/RCS1 can be replaced by binding sites specific for the PD of Ey. P3/RCS1 is conserved in the promoters of all Drosophila rhodopsin genes as well as in many opsin genes in vertebrates. Mutimerized P3 sites in front of a basal promoter are able to drive the expression of a reporter gene in all photoreceptors. These results suggest that Pax-6/Ey directly regulates rhodopsin 1 gene expression by binding to the conserved P3/RCS1 element in the promoter.
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Affiliation(s)
- G Sheng
- Laboratory of Molecular Genetics, Howard Hughes Medical Institute, The Rockefeller University, New York, New York 10021, USA
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Abstract
The photoreceptor cells of the Drosophila compound eye are precisely organized in elementary units called ommatidia. The outer (R1-R6) and inner (R7, R8) photoreceptors represent two physiologically distinct systems with two different projection targets in the brain (for review see Hardie, 1985). All cells of the primary system, R1-R6, express the same rhodopsin and are functionally identical. In contrast, the R7 and R8 photoreceptors are different from each other. They occupy anatomically precise positions, with R7 on top of R8. In fact, there are several classes of R7/R8 pairs, which differ morphologically and functionally and are characterized by the expression of one of two R7-specific opsins, rh3 or rh4. Here, we describe the identification of a new opsin gene, rhodopsin 5, expressed in one subclass of R8 cells. Interestingly, this subclass represents R8 cells that are directly underneath the R7 photoreceptors expressing rh3, but are never under those expressing rh4. These results confirm the existence of two subpopulations of R7 and R8 cells, which coordinate the expression of their respective rh genes. Thus, developmental signaling pathways between R7 and R8 lead to the exclusive expression of a single rhodopsin gene per cell and to the coordinate expression of another one in the neighboring cell. Consistent with this, rh5 expression in R8 disappears when R7 cells are absent (in sevenless mutant). We propose a model for the concerted evolution of opsin genes and the elaboration of the architecture of the retina.
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Affiliation(s)
- D Papatsenko
- Howard Hughes Medical Institute, The Rockefeller University, New York, NY 10021, USA
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Bertuccioli C, Fasano L, Jun S, Wang S, Sheng G, Desplan C. In vivo requirement for the paired domain and homeodomain of the paired segmentation gene product. Development 1996; 122:2673-85. [PMID: 8787742 DOI: 10.1242/dev.122.9.2673] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.5] [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: 11/20/2022]
Abstract
The Drosophila pair-rule gene paired is required for the correct expression of the segment polarity genes wingless, engrailed and gooseberry. It encodes a protein containing three conserved motifs: a homeodomain (HD), a paired domain (PD) and a PRD (His/Pro) repeat. We use a rescue assay in which paired (or a mutated version of paired in which the functions of the conserved motifs have been altered) is expressed under the control of its own promoter, in the absence of endogenous paired, to dissect the Paired protein in vivo. We show that both the HD and the N- terminal subdomain of the PD (PAI domain) are absolutely required within the same molecule for normal paired function. In contrast, the conserved C-terminal subdomain of the PD (RED domain) appears to be dispensable. Furthermore, although a mutation abolishing the ability of the homeodomain to dimerize results in an impaired Paired molecule, this molecule is nonetheless able to mediate a high degree of rescue. Finally, a paired transgene lacking the PRD repeat is functionally impaired, but still able to rescue to viability. We conclude that, while Prd can use its DNA-binding domains combinatorially in order to achieve different DNA-binding specificities, its principal binding mode requires a cooperative interaction between the PAI domain and the homeodomain.
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Affiliation(s)
- C Bertuccioli
- Howard Hughes Medical Institute, The Rockefeller University, New York, NY 10021, USA
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Wilson DS, Sheng G, Jun S, Desplan C. Conservation and diversification in homeodomain-DNA interactions: a comparative genetic analysis. Proc Natl Acad Sci U S A 1996; 93:6886-91. [PMID: 8692913 PMCID: PMC38903 DOI: 10.1073/pnas.93.14.6886] [Citation(s) in RCA: 101] [Impact Index Per Article: 3.6] [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: 02/01/2023] Open
Abstract
Nearly all metazoan homeodomains (HDs) possess DNA binding targets that are related by the presence of a TAAT sequence. We use an in vitro genetic DNA binding site selection assay to refine our understanding of the amino acid determinants for the recognition of the TAAT site. Superimposed upon the conserved ability of metazoan HDs to recognize a TAAT core is a difference in their preference for the bases that lie immediately 3' to it. Amino acid position 50 of the HD has been shown to discriminate among these base pairs, and structural studies have suggested that water-mediated hydrogen bonds and van der Waals contacts underlie for this ability. Here, we show that each of six amino acids tested at position 50 can confer a distinct DNA binding specificity.
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Affiliation(s)
- D S Wilson
- Howard Hughes Medical Institute, The Rockefeller University, New York, NY 10021, USA
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Zhou JF, He MD, Li MZ, Yang W, Tang JZ, Sheng G, Zhu HF, Shao JF, Yang J. Effects of zaizhang-I, a traditional Chinese medicine, on immunologically mediated aplastic anemia in mice. J Tongji Med Univ 1994; 14:188-92. [PMID: 7807608 DOI: 10.1007/bf02886805] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Immunologically mediated aplastic anemia in mice were used as animal models to study the the curative effect of Zaizhang-I in term of the changes of two pathogenetic aspects in aplastic mice, namely the deficiency of hematopoietic stem cells and the disturbance of immunology. Our results demonstrated that in aplastic mice, after treatment by Zaizhang-I, the loss of mature hematopoietic cells (WBC, RBC, Plt) were reduced, and marrow cellular cytosis, and their clinical findings were improved, indicating a partial remission. The present data show that its curative mechanism lies in the action of promoting the recovery of colony forming unit-spleen (CFU-S) and reversing immunologically-induced plasma colony forming unit granulocyte/macrophage (CFU-GM) inhibitory activity. Natural killer cells activity (Nka) and interleukin-2, tumor necrosis factors (TNF) were also so examined to further understand the mechanism by which Zaizhang-I reverse plasma hematopoietic activity.
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Affiliation(s)
- J F Zhou
- Integrated traditional chinese medicine and western medicine institution, Tongji hospital, Tongji Medical University, Wuhan
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Abstract
Homeo domain-containing proteins mediate many transcriptional processes in eukaryotes. Because nearly all animal homeo proteins are believed to bind to short, highly related DNA sequences, the basis for their high specificity of action is not understood. We show that cooperative dimerization on palindromic DNA sequences can provide increased specificity to one of the three major classes of homeo domains, the Paired/Pax class. The 60-amino-acid homeo domains from this class contain sufficient information to bind cooperatively as homo- and heterodimers to palindromic DNA sequences; that is, the binding of one homeo domain molecule can increase the affinity of a second molecule by up to 300-fold. Different members of the Paired (Prd) class of homeo domains prefer different spacings between half-sites, as determined by the ninth amino acid residue of the recognition helix. In addition, this residue determines the identity of the base pairs at the center of the palindromic sites, as well as the magnitude of the cooperative interaction. The cooperative dimerization of homeo domains in the Prd class distinguishes them from other classes, whereas binding-site configuration and sequence specificity allow for distinctions within this class.
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Affiliation(s)
- D Wilson
- Howard Hughes Medical Institute, Rockefeller University, New York, New York 10021-6399
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41
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Affiliation(s)
- T C Sheng
- Kerckhoff Laboratories of Biology, California Institute of Technology, Pasadena, California
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