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Gao Z, Wan Z, Yu P, Shang Y, Zhu G, Jiang H, Chen Y, Wang S, Lei F, Huang W, Zeng Q, Wang Y, Rong W, Hong Y, Gao Q, Niu P, Zhai Z, An K, Ding C, Wang Y, Gu G, Wang X, Meng Q, Ye S, Liu H, Gu J. A recurrence-predictive model based on eight genes and tumor mutational burden/microsatellite instability status in Stage II/III colorectal cancer. Cancer Med 2024; 13:e6720. [PMID: 38111983 PMCID: PMC10807589 DOI: 10.1002/cam4.6720] [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: 03/16/2023] [Revised: 06/18/2023] [Accepted: 10/27/2023] [Indexed: 12/20/2023] Open
Abstract
BACKGROUND Although adjuvant chemotherapy (ACT) is widely used to treat patients with Stage II/III colorectal cancer (CRC), administering ACT to specific patients remains a challenge. The decision to ACT requires an accurate assessment of recurrence risk and absolute treatment benefit. However, the traditional TNM staging system does not accurately assess a patient's individual risk of recurrence. METHODS To identify recurrence risk-related genetic factors for Stage II/III CRC patients after radical surgery, we conducted an analysis of whole-exome sequencing of 47 patients with Stage II/III CRC who underwent radical surgery at five institutions. Patients were grouped into non-recurrence group (NR, n = 24, recurrence-free survival [RFS] > 5 years) and recurrence group (R, n = 23, RFS <2 years). The TCGA-COAD/READ cohort was employed as the validation dataset. RESULTS A recurrence-predictive model (G8plus score) based on eight gene (CUL9, PCDHA12, HECTD3, DCX, SMARCA2, FAM193A, AATK, and SORCS2) mutations and tumor mutation burden/microsatellite instability (TMB/MSI) status was constructed, with 97.87% accuracy in our data and 100% negative predictive value in the TCGA-COAD/READ cohort. For the TCGA-COAD/READ cohort, the G8plus-high group had better RFS (HR = 0.22, p = 0.024); the G8plus-high tumors had significantly more infiltrated immune cell types, higher tertiary lymphoid structure signature scores, and higher immunological signature scores. The G8plus score was also a predict biomarker for immunotherapeutic in advanced CRC in the PUCH cohort. CONCLUSIONS In conclusion, the G8plus score is a powerful biomarker for predicting the risk of recurrence in patients with stage II/III CRC. It can be used to stratify patients who benefit from ACT and immunotherapy.
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Affiliation(s)
- Zhaoya Gao
- Department of General SurgeryPeking University First HospitalBeijingChina
| | - Zhiyi Wan
- Genecast Biotechnology Co., Ltd.Wuxi CityJiangsu ProvinceChina
| | - Pengfei Yu
- Department of General SurgeryAir Force Medical Center, Chinese People's Liberation ArmyBeijingChina
| | - Yan Shang
- Department of Colorectal SurgeryCancer Hospital of China Medical University, Liaoning Cancer Hospital and InstituteShenyangLiaoning ProvinceChina
| | - Guangsheng Zhu
- Department of Gastrointestinal SurgeryHubei Cancer HospitalWuhanHubei ProvinceChina
| | - Huiyuan Jiang
- Department of Colorectal and Anal SurgeryShanxi Province Cancer Hospital/ Shanxi Hospital Affiliated to Cancer Hospital, Chinese Academy of Medical Sciences/Cancer Hospital Affiliated to Shanxi Medical UniversityTaiyuanShanxi ProvinceChina
| | - Yawei Chen
- Genecast Biotechnology Co., Ltd.Wuxi CityJiangsu ProvinceChina
| | - Shengzhou Wang
- Genecast Biotechnology Co., Ltd.Wuxi CityJiangsu ProvinceChina
| | - Fuming Lei
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
| | - Wensheng Huang
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
| | - Qingmin Zeng
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
| | - Yanzhao Wang
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
| | - Wanshui Rong
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
| | - Yuming Hong
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
| | - Qingkun Gao
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
| | - Pengfei Niu
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
| | - Zhichao Zhai
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
| | - Ke An
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
| | - Changmin Ding
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
| | - Yunfan Wang
- Department of PathologyPeking University Shougang HospitalBeijingChina
| | - Guoli Gu
- Department of General SurgeryAir Force Medical Center, Chinese People's Liberation ArmyBeijingChina
| | - Xin Wang
- Department of General SurgeryPeking University First HospitalBeijingChina
| | - Qingkai Meng
- Department of Colorectal SurgeryCancer Hospital of China Medical University, Liaoning Cancer Hospital and InstituteShenyangLiaoning ProvinceChina
| | - Shengwei Ye
- Department of Gastrointestinal SurgeryHubei Cancer HospitalWuhanHubei ProvinceChina
| | - Haiyi Liu
- Department of Colorectal and Anal SurgeryShanxi Province Cancer Hospital/ Shanxi Hospital Affiliated to Cancer Hospital, Chinese Academy of Medical Sciences/Cancer Hospital Affiliated to Shanxi Medical UniversityTaiyuanShanxi ProvinceChina
| | - Jin Gu
- Department of Gastrointestinal SurgeryPeking University Shougang HospitalBeijingChina
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Gastrointestinal SurgeryPeking University Cancer Hospital & InstituteBeijingChina
- Peking‐Tsinghua Center for Life SciencesPeking UniversityBeijingChina
- Peking University International Cancer InstituteBeijingChina
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Gao Z, Wang Y, Zeng Q, Rong W, Wang Z, Zhai Z, Ding C, An K, Gao Q, Niu P, Hong Y, He X, Huang W, Lei F, Wen B, Wang X, Gu J. Perineal defect reconstruction after surgery for advanced or locally recurrent rectal cancer involving organ resection: Multiple flaps combined with lining repair. Colorectal Dis 2023; 25:2087-2092. [PMID: 37612783 DOI: 10.1111/codi.16710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 07/04/2023] [Accepted: 07/05/2023] [Indexed: 08/25/2023]
Abstract
AIM The aim of this study was to investigate the efficacy of multiple perineal perforator flaps in repairing deep perineal defects after pelvic exenteration for locally advanced or recurrent rectal cancer. METHOD We investigated the outcomes of eight patients whose repairs involved a novel method of using an internal pudendal artery perforator (IPAP) flap combined with an inferior gluteal artery perforator (IGAP) flap. RESULTS There were four male and four female patients with a mean age of 56 years (36-72 years). Bilateral IPAP flaps combined with bilateral IGAP flaps were used in five patients, unilateral IPAP flaps combined with bilateral IGAP flaps were used in two patients and bilateral IPAP flaps were used in one patient. There were no functional limitations in daily activities during the 6-month follow-up period. CONCLUSION Our study showed that using multiple perineal perforator flaps combined with lining repair is feasible for repairing deep perineal defects in patients who have undergone rectal cancer surgery that includes pelvic exenteration.
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Affiliation(s)
- Zhaoya Gao
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
- Department of General Surgery, Peking University First Hospital, Beijing, China
| | - Yanzhao Wang
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Qingmin Zeng
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Wanshui Rong
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Zilong Wang
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Zhichao Zhai
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Changmin Ding
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Ke An
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Qingkun Gao
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Pengfei Niu
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Yuming Hong
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Xiaomang He
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Wensheng Huang
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Fuming Lei
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
| | - Bing Wen
- Department of Plastic Surgery and Burn, Peking University First Hospital, Beijing, China
| | - Xin Wang
- Department of General Surgery, Peking University First Hospital, Beijing, China
| | - Jin Gu
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, Beijing, China
- Department of Gastrointestinal Surgery, Peking University Cancer Hospital, Beijing, China
- Peking University International Cancer Institute, Beijing, China
- Peking-Tsinghua Center for Life Science, Beijing, China
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3
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Zhai Z, Fang Y, Cheng J, Tian Y, Liu L, Cao X. Intrinsic morphology and spatial distribution of non-structural carbohydrates contribute to drought resistance of two mulberry cultivars. Plant Biol (Stuttg) 2023. [PMID: 37099325 DOI: 10.1111/plb.13533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2023] [Accepted: 04/23/2023] [Indexed: 05/11/2023]
Abstract
Drought is one of the most adverse environmental stresses limiting plant growth and productivity. However, the underlying mechanisms regarding metabolism of non-structural carbohydrates (NSC) in source and sink organs are still not fully elucidated in woody trees. Saplings of mulberry cv Zhongshen1 and Wubu were subjected to a 15-day progressive drought stress. NSC levels and gene expression involved in NSC metabolism were investigated in roots and leaves. Growth performance and photosynthesis, leaf stomatal morphology, and other physiological parameters were also analysed. Under well-watered conditions, Wubu had a higher R/S, with higher NSC in leaves than in roots; Zhongshen1 had a lower R/S with higher NSC in roots than leaves. Under drought stress, Zhongshen1 showed decreased productivity and increased proline, abscisic acid, ROS content and activity of antioxidant enzymes, while Wubu sustained comparable productivity and photosynthesis. Interestingly, drought resulted in decreased starch and slightly increased soluble sugars in leaves of Wubu, accompanied by notable downregulation of starch-synthesizing genes and upregulation of starch-degrading genes. Similar patterns in NSC levels and relevant gene expression were also observed in roots of Zhongshen1. Concurrently, soluble sugars decreased and starch was unchanged in roots of Wubu and leaves of Zhongshen1. However, gene expression of starch metabolism in roots of Wubu was unaltered, but in leaves of Zhongshen1 starch metabolism was more activated. These findings revealed that intrinsic R/S and spatial distribution of NSC in roots and leaves concomitantly contribute to drought resistance in mulberry.
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Affiliation(s)
- Z Zhai
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, Sericultural Research Institute, Zhenjiang, Jiangsu, China
| | - Y Fang
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, Sericultural Research Institute, Zhenjiang, Jiangsu, China
| | - J Cheng
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, Sericultural Research Institute, Zhenjiang, Jiangsu, China
| | - Y Tian
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, Sericultural Research Institute, Zhenjiang, Jiangsu, China
| | - L Liu
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, Sericultural Research Institute, Zhenjiang, Jiangsu, China
| | - X Cao
- Jiangsu Key Laboratory of Sericultural Biology and Biotechnology, College of Biotechnology, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu, China
- Key Laboratory of Silkworm and Mulberry Genetic Improvement, Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, Sericultural Research Institute, Zhenjiang, Jiangsu, China
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Heresi G, Abe K, Forfia P, Jevnikar M, Moiseeva O, Kopeć G, Sheares K, Skoro-Sajer N, Terra-Filho M, Whitford H, Beaudet A, Gressin V, Meijer C, Zhai Z. Assessment of Clinical Practices and Unmet Needs in Chronic Thromboembolic Pulmonary Hypertension (CTEPH) - A Global Cross-Sectional Scientific Survey (CLARITY). J Heart Lung Transplant 2023. [DOI: 10.1016/j.healun.2023.02.1087] [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: 04/05/2023] Open
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5
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Gao Z, Huang D, Chen H, Yang Y, An K, Ding C, Yuan Z, Zhai Z, Niu P, Gao Q, Cai J, Zeng Q, Wang Y, Hong Y, Rong W, Huang W, Lei F, Wang X, Chen S, Zhao X, Bai Y, Gu J. Development and validation of postoperative circulating tumor DNA combined with clinicopathological risk factors for recurrence prediction in patients with stage I-III colorectal cancer. J Transl Med 2023; 21:63. [PMID: 36717891 PMCID: PMC9887832 DOI: 10.1186/s12967-023-03884-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 01/10/2023] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND Circulating tumor DNA (ctDNA) detection following curative-intent surgery could directly reflect the presence of minimal residual disease, the ultimate cause of clinical recurrence. However, ctDNA is not postoperatively detected in ≥ 50% of patients with stage I-III colorectal cancer (CRC) who ultimately recur. Herein we sought to improve recurrence risk prediction by combining ctDNA with clinicopathological risk factors in stage I-III CRC. METHODS Two independent cohorts, both consisting of early-stage CRC patients who underwent curative surgery, were included: (i) the discovery cohort (N = 124) with tumor tissues and postoperative plasmas for ctDNA determination; and (ii) the external validation cohort (N = 125) with available ctDNA results. In the discovery cohort, somatic variations in tumor tissues and plasmas were determined via a 733-gene and 127-gene next-generation sequencing panel, respectively. RESULTS In the discovery cohort, 17 of 108 (15.7%) patients had detectable ctDNA. ctDNA-positive patients had a significantly high recurrence rate (76.5% vs. 16.5%, P < 0.001) and short recurrence-free survival (RFS; P < 0.001) versus ctDNA-negative patients. In addition to ctDNA status, the univariate Cox model identified pathologic stage, lymphovascular invasion, nerve invasion, and preoperative carcinoembryonic antigen level associated with RFS. We combined the ctDNA and clinicopathological risk factors (CTCP) to construct a model for recurrence prediction. A significantly higher recurrence rate (64.7% vs. 8.1%, P < 0.001) and worse RFS (P < 0.001) were seen in the high-risk patients classified by the CTCP model versus those in the low-risk patients. Receiver operating characteristic analysis demonstrated that the CTCP model outperformed ctDNA alone at recurrence prediction, which increased the sensitivity of 2 year RFS from 49.6% by ctDNA alone to 87.5%. Harrell's concordance index, calibration curve, and decision curve analysis also suggested that the CTCP model had good discrimination, consistency, and clinical utility. These results were reproduced in the validation cohort. CONCLUSION Combining postoperative ctDNA and clinical risk may better predict recurrence than ctDNA alone for developing a personalized postoperative management strategy for CRC.
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Affiliation(s)
- Zhaoya Gao
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Dandan Huang
- grid.452694.80000 0004 0644 5625Department of Oncology, Peking University Shougang Hospital, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Hui Chen
- Medical Affairs, 3D Medicines, Inc., Shanghai, China
| | - Yong Yang
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Ke An
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Changmin Ding
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Zheping Yuan
- Medical Affairs, 3D Medicines, Inc., Shanghai, China
| | - Zhichao Zhai
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Pengfei Niu
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Qingkun Gao
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Jinping Cai
- Medical Affairs, 3D Medicines, Inc., Shanghai, China
| | - Qingmin Zeng
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Yanzhao Wang
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Yuming Hong
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Wanshui Rong
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Wensheng Huang
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Fuming Lei
- grid.452694.80000 0004 0644 5625Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Xiaodong Wang
- grid.452694.80000 0004 0644 5625Department of Oncology, Peking University Shougang Hospital, Beijing, China ,grid.11135.370000 0001 2256 9319Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China
| | - Shiqing Chen
- Medical Affairs, 3D Medicines, Inc., Shanghai, China
| | - Xiaochen Zhao
- Medical Affairs, 3D Medicines, Inc., Shanghai, China
| | - Yuezong Bai
- Medical Affairs, 3D Medicines, Inc., Shanghai, China
| | - Jin Gu
- Department of Gastrointestinal Surgery, Peking University Shougang Hospital, No.9 Jinyuanzhuang Road, Shijingshan District, Beijing, China. .,Center for Precision Diagnosis and Treatment of Colorectal Cancer and Inflammatory Disease, Peking University Health Science Center, Beijing, China. .,Peking-Tsinghua Center for Life Sciences, Peking University, Beijing, China. .,Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Department of Gastrointestinal Surgery, Peking University Cancer Hospital & Institute, Beijing, China. .,Peking University International Cancer Institute, Beijing, China.
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6
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Skoro-Sajer N, Kopec G, Abe K, Forfia P, Heresi G, Jevnikar M, Sheares K, Terra-Filho M, Whitford H, Zhai Z, Beaudet A, Gressin V, Meijer C, Moiseeva O. Chronic thromboembolic pulmonary hypertension global cross-sectional scientific survey (CLARITY) – interim results on the adoption and perception of guidelines. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1867] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
The chronic thromboembolic pulmonary hypertension (CTEPH) global cross-sectional scientific survey (CLARITY) was established to provide insights into current clinical practices and unmet needs in the diagnosis and treatment of CTEPH. The European Society of Cardiology (ESC) plays a leading role in establishing guidelines (GLs) for clinical decision-making in acute pulmonary embolism (PE) and CTEPH. It is of interest to better understand how these GLs affect real-world practice.
Purpose
To assess the adoption and perception of clinical practice GLs among medical specialists working in the fields of cardiology.
Methods
The online survey was developed by an independent committee of 11 international CTEPH experts using the Delphi method and designed to elicit responses regarding disease awareness and management, including follow-up after acute PE and diagnosis of suspected CTEPH. Logic functions were implemented to ensure respondents only viewed questions relevant to their clinical practice. To date, professional members of 17 Scientific Societies and other medical organizations were invited to respond to the survey. For this interim analysis response data were collected from 10.09.2021 to 10.02.2022.
Results
Out of 242 respondents, 107 specialized in cardiology (44%) and 7 specialized in angiology (3%) were included in this interim analysis. Respondents were from Europe (75%, n=85), Asia Pacific (20%, n=23) and the Americas (5%, n=6) and generally had 15–29 (40%, n=45) or 5–14 (37%, n=42) years of working experience. Of the 67 respondents (59%) that did not work in a pulmonary hypertension (PH)/CTEPH expert centre, only 24 (36%) were affiliated with such a centre.
Of respondents involved in acute PE management (n=101) and CTEPH diagnosis (n=87), 87 (86%) and 71 (82%) reported following the 2019 PE ESC/European Respiratory Society (ERS) and 2015 PH ESC/ERS GLs, respectively. Regardless of country, a higher proportion of respondents from Asia Pacific also reported using national GLs for PE (44%, n=10) and CTEPH (52%, n=12) compared to respondents from Europe (15%, n=11; 25%, n=15) and the Americas (25%, n=1; 40%, n=2). Overall, GLs were perceived to facilitate clinical practice (Fig. 1).
Lack of GLs to screen for CTEPH following acute PE was more often reported as a barrier by respondents from Asia Pacific and those working in an expert centre. Low adherence to GLs was reported as a barrier to CTEPH diagnosis by approximately 1/3 of respondents, irrespective of care setting, and in higher proportion among those with more working experience.
Conclusion
Despite the availability of GLs, reported barriers indicate an opportunity for educational activities to improve adoption and adherence to GLs. Observed differences and potential gaps between clinical practice and the GLs warrant further exploration through additional global insights collected by the survey throughout April 2022.
Funding Acknowledgement
Type of funding sources: Private company. Main funding source(s): This survey is sponsored by Actelion Pharmaceuticals Ltd, a Janssen Pharmaceutical Company of Johnson & Johnson
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Affiliation(s)
| | - G Kopec
- Jagiellonian University Medical College, John Paul II Hospital, Pulmonary Circulation Centre , Krakow , Poland
| | - K Abe
- Kyushu University Hospital , Fukuoka , Japan
| | - P Forfia
- Temple University Hospital , Philadelphia , United States of America
| | - G Heresi
- Cleveland Clinic , Cleveland , United States of America
| | - M Jevnikar
- Hospital Kremlin Bicetre , Paris , France
| | - K Sheares
- Royal Papworth Hospital , Cambridge , United Kingdom
| | - M Terra-Filho
- Heart Institute of the University of Sao Paulo (InCor), Pulmonary Division , Sao Paulo , Brazil
| | - H Whitford
- The Alfred Hospital , Melbourne , Australia
| | - Z Zhai
- China-Japan Friendship Hospital, National Center for Respiratory Medicine , Beijing , China
| | - A Beaudet
- Actelion Pharmaceuticals Ltd , Allschwil , Switzerland
| | - V Gressin
- Actelion Pharmaceuticals Ltd , Allschwil , Switzerland
| | - C Meijer
- Monitor Deloitte , Zaventem , Belgium
| | - O Moiseeva
- Almazov National Medical Research Centre , Saint Petersburg , Russian Federation
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7
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Gu J, Lei F, Wang X, Chen H, Huang W, He X, Hong Y, Zeng Q, Wang Y, Gao Q, Yuan Z, Niu P, Huang D, Gao Z, Ding C, Zhai Z, An K, Chen S, Zhao X, Bai Y. Recurrence risk stratification model for patients with stage I-III colorectal cancer based on clinicopathological and postoperative ctDNA predictors. J Clin Oncol 2022. [DOI: 10.1200/jco.2022.40.16_suppl.e15511] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e15511 Background: The aim of this study was to propose a new kind of recurrence risk classification and further establish a prognostic model for resected stage I-III colorectal cancer (CRC). Methods: From 2017 to 2020, 142 patients diagnosed with stage I-III CRC at Peking University Shougang Hospital were recruited for this study. Tissues and paired white blood cells were analyzed with a 733-gene NGS panel, and peripheral plasma obtained 7-10 days after surgery was analyzed with a 127-gene ultra-deep target panel in a CLIA-certified laboratory. The relationship between the postoperative ctDNA status, clinicopathological features and recurrence-free survival (RFS) was identified by log-rank test and Cox regression analysis. Results: In total, 108 patients successfully completed both tissue and postoperative plasma NGS tests, of which 17 patients were postoperatively positive for ctDNA (tumor-informed, ≥1 somatic mutation). Postoperative ctDNA positivity was independently associated with poorer RFS (HR = 8.4, P < 0.0001). Postoperative recurrence rates were significantly higher in ctDNA-positive patients than ctDNA-negative patients (76.5% vs 16.5%, P < 0.0001). Univariate analysis showed that, in addition to ctDNA status, stage, vascular invasion, neural invasion, and preoperative CEA were all significantly associated with worse RFS (P < 0.05). Furthermore, in a COX regression model, the contribution of these clinicopathological factors to RFS has been adjusted. The model showed good discrimination [the concordance index (c-index): 0.811] of recurrence. Clinically high-risk groups according to clinicopathological risk model had significantly poorer RFS than low-risk groups (HR = 10.6, P < 0.001). In the clinicopathological high-risk group, ctDNA-positive patients can still further differentiate the higher risk of recurrence (HR = 3.7, P = 0.0012). There were similar trends in the clinicopathological low-risk group (HR = 6.1, P = 0.066). Combining the clinicopathological model and ctDNA, patients with either clinicopathological high-risk or ctDNA-positive had a significantly poorer RFS, compared with both clinicopathological low-risk and ctDNA-negative (HR = 12.9, P < 0.0001). Conclusions: Postoperative ctDNA can independently predict the risk of recurrence in stage I-III CRC. Combining clinicopathological factors and ctDNA showed superiority for recurrence risk stratification over either alone. This recurrence risk stratification model may serve as a useful clinical tool to help clinicians determine individualized treatment plans for stage I-III CRC patients. However, the model still needs further external cohort validation.
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Affiliation(s)
- Jin Gu
- Peking University Cancer Hospital; Peking University Shougang Hospital, Beijing, China
| | - Fuming Lei
- Peking University Shougang Hospital, Beijing, China
| | | | - Hui Chen
- The Medical Department, 3D Medicines Inc., Shanghai, China
| | | | - Xiaomang He
- Peking University Shougang Hospital, Beijing, China
| | - Yuming Hong
- Peking University Shougang Hospital, Beijing, China
| | - Qingmin Zeng
- Peking University Shougang Hospital, Beijing, China
| | - Yanzhao Wang
- Peking University Shougang Hospital, Beijing, China
| | - Qingkun Gao
- Peking University Shougang Hospital, Beijing, China
| | - Zheping Yuan
- The Medical Department, 3D Medicines Inc., Shanghai, China
| | - Pengfei Niu
- Peking University Shougang Hospital, Beijing, China
| | - Dandan Huang
- Peking University Shougang Hospital, Beijing, China
| | - Zhaoya Gao
- Peking University Shougang Hospital, Beijing, China
| | | | - Zhichao Zhai
- Peking University Shougang Hospital, Beijing, China
| | - Ke An
- Peking University Shougang Hospital, Beijing, China
| | - Shiqing Chen
- The Medical Department, 3D Medicines Inc., Shanghai, China
| | - Xiaochen Zhao
- The Medical Department, 3D Medicines Inc., Shanghai, China
| | - Yuezong Bai
- Department of Gastrointestinal Oncology, Key laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Peking University Cancer Hospital & Institute, Beijing, China
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8
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Gu J, Lei F, Wang X, Huang W, He X, Hong Y, Zeng Q, Wang Y, Gao Q, Niu P, Huang D, Gao Z, Ding C, Zhai Z, An K, Chen H, Zhao X, Chen S, Bai Y. 458P Circulating tumor DNA analysis predicting recurrence risk in patients with stage I-III colorectal cancer. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.979] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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9
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Cao J, Li Z, Zhou J, Zhang Q, Chen Y, Zhu Z, Li L, Feng R, Li F, Xu B, Yang W, Zhai Z, Zhang X, Wen Q, Xue H, Duan X, Fan S, Cai Y, Su W. 833O A phase Ib study result of HMPL-689, a PI3Kδ inhibitor, in Chinese patients with relapsed/refractory lymphoma. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.126] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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10
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Wu L, Miao H, Yu P, Huang Z, Zheng J, Li J, Zhai Z, Jia T. Study of PWR hot leg creep rupture and RCS depressurization strategy during an SBO accident. KERNTECHNIK 2021. [DOI: 10.1515/kern-2021-0005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Preventing the leakage of radioactive materials is important to nuclear safety. During a station blackout accident in pressurized water reactors, the hot leg creep rupture caused by hot leg countercurrent flow occurs before the reactor pressure vessel failure that caused by lower head rupture. The secondary fission products barrier is lost after hot leg creep rupture. An analysis for this phenomenon was done using the Modular Accident Analysis Program version 4.0.4 code. A station blackout accident for CPR1000 is simulated and the occurrence and influence of hot leg creep rupture phenomenon are analyzed in detail. After that, a sensitivity analysis of the opening of different pressurizer pilot-operated relief valves at five minutes after entering severe accident management guideline (before the hot leg creep rupture occurs) is studied. The results show that reactor pressure vessel failure time can be extended by at least 4 h if at least one pilot-operated relief valve is opened and direct containment heating phenomenon can be eliminated if at least two pilot-operated relief valves are opened.
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Affiliation(s)
- L. Wu
- College of Energy Xiamen University No. 4221-104 Xiangan South Road Xiamen P. R. China
- Fujian Research Center for Nuclear Engineering Xiamen City Fujian Province P. R. China
| | - H. Miao
- College of Energy Xiamen University No. 4221-104 Xiangan South Road Xiamen P. R. China
- Fujian Research Center for Nuclear Engineering Xiamen City Fujian Province P. R. China
| | - P. Yu
- College of Energy Xiamen University No. 4221-104 Xiangan South Road Xiamen P. R. China
- Fujian Research Center for Nuclear Engineering Xiamen City Fujian Province P. R. China
| | - Z. Huang
- College of Energy Xiamen University No. 4221-104 Xiangan South Road Xiamen P. R. China
- Fujian Research Center for Nuclear Engineering Xiamen City Fujian Province P. R. China
| | - J. Zheng
- College of Energy Xiamen University No. 4221-104 Xiangan South Road Xiamen P. R. China
- Fujian Research Center for Nuclear Engineering Xiamen City Fujian Province P. R. China
| | - J. Li
- College of Energy Xiamen University No. 4221-104 Xiangan South Road Xiamen P. R. China
- Fujian Research Center for Nuclear Engineering Xiamen City Fujian Province P. R. China
| | - Z. Zhai
- Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu Sichuan P.R. China
| | - T. Jia
- Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of China Chengdu Sichuan P.R. China
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11
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Zhai Z, Jiang L, Ye Y, Li X, Lan G, Chen H, Huang L, Zhu Y, Du K, Wang W, Xu C. P23.03 The New Therapy on Esophageal Leiomyosarcoma in the Upper Esophagus. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.608] [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: 10/21/2022]
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12
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Huang L, Chen H, Li X, Lan G, Zhai Z, Zhu Y, Du K, Wang W, Xu C, Fang M. P38.08 Clinical Features and Survival Risk Factors of Lung Lymphoepithelioma-Like Carcinoma Based on the SEER Database Analysis. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.789] [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: 11/16/2022]
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13
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Lan G, Wang W, Zhai Z, Li X, Chen H, Huang L, Zhu Y, Du K, Xu C. P64.01 MiRNAs in Exosomes Isolated From the Blood of Non-Small Cell Lung Cancer Patients: Biomarkers for Lung Cancer Prediction and Prognosis. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.991] [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: 10/21/2022]
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14
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Zhai Z, Li C, Chen Y, Gerotziafas G, Zhang Z, Wan J, Liu P, Elalamy I, Wang C. Prevention and Treatment of Venous Thromboembolism Associated with Coronavirus Disease 2019 Infection: A Consensus Statement Before Guidelines. J Vasc Surg Venous Lymphat Disord 2021. [PMCID: PMC7737528 DOI: 10.1016/j.jvsv.2020.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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15
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Shan C, Sun B, Dalloul RA, Zhai Z, Sun P, Li M, Yang S, Luan W. Effect of the oral administration of astragalus polysaccharides on jejunum mucosal immunity in chickens vaccinated against Newcastle disease. Microb Pathog 2019; 135:103621. [PMID: 31310831 DOI: 10.1016/j.micpath.2019.103621] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [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: 02/25/2019] [Revised: 06/29/2019] [Accepted: 07/13/2019] [Indexed: 01/06/2023]
Abstract
Astragalus polysaccharides (APS) are a traditional Chinese medicine with a therapeutic effect by enhancing immune function; however, the underlying functional mechanism is still unclear. The aim of the present study was to determine the effect of oral administration of APS on jejunum mucosal immunity in chickens vaccinated against Newcastle disease (ND). One-day-old Hy-Line male chickens were divided into five groups of 20 chicks each: three APS groups, one vaccinated control (VC) group and one non-vaccinated negative control (NC) group. On d 10, the APS groups were orally administered 0.5 mL of APS at doses of 1 mg/mL (APSL), 2 mg/mL (APSM) and 4 mg/mL (APSH) daily for 4 consecutive days. The chicks in the control groups were administered 0.5 mL saline for those 4 days. All groups except NC were administered a ND virus (NDV) vaccine on day 14. The jejunum was removed from 4 randomly selected chickens of each group at 1, 7, 14 and 28 days after vaccination. The jejunal villus height (VH) and crypt depth (CD) were measured and the VH:CD ratio calculated. Immunohistochemistry was used to analyze the differences of IgA+ cells in the jejunum. NDV specific secretory IgA (sIgA) levels in jejunal contents were detected using an indirect ELISA. At most time points, VH:CD ratios, number of IgA+ cells, and sIgA levels were significantly higher in the APS groups than those in VC and NC groups, but there were little differences among the three doses of APS groups. These results indicate that oral administration of APS could enhance the intestinal mucosal immune function of chickens, and APS could be used as a vaccine enhancer.
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Affiliation(s)
- Chunlan Shan
- College of Animal Science and Technology, Jilin Agricultural University, Jilin, 130118, China; College of Animal Science and Technology, Yunnan Agricultural University, Yunnan, 650210, China
| | - Bodong Sun
- College of Animal Science and Technology, Jilin Agricultural University, Jilin, 130118, China; Institute of Veterinary Medicine Feed Inspection in Guizhou Province, 550000, China
| | - Rami A Dalloul
- Avian Immunobiology Laboratory, Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Zhichao Zhai
- College of Animal Science and Technology, Jilin Agricultural University, Jilin, 130118, China
| | - Peng Sun
- College of Animal Science and Technology, Jilin Agricultural University, Jilin, 130118, China
| | - Maohui Li
- College of Animal Science and Technology, Jilin Agricultural University, Jilin, 130118, China
| | - Shubao Yang
- College of Animal Science and Technology, Jilin Agricultural University, Jilin, 130118, China.
| | - Weimin Luan
- College of Animal Science and Technology, Jilin Agricultural University, Jilin, 130118, China.
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16
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Ahmed W, Zhai Z, Gao C. Adaptive antibacterial biomaterial surfaces and their applications. Mater Today Bio 2019; 2:100017. [PMID: 32159147 PMCID: PMC7061676 DOI: 10.1016/j.mtbio.2019.100017] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [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: 03/22/2019] [Revised: 06/14/2019] [Accepted: 06/18/2019] [Indexed: 12/20/2022] Open
Abstract
Bacterial infections on the implant surface may eventually lead to biofilm formation and thus threaten the use of implants in body. Despite efficient host immune system, the implant surface can be rapidly occupied by bacteria, resulting in infection persistence, implant failure, and even death of the patients. It is difficult to cope with these problems because bacteria exhibit complex adhesion mechanisms to the implants that vary according to bacterial strains. Different biomaterial coatings have been produced to release antibiotics to kill bacteria. However, antibiotic resistance occurs very frequently. Stimuli-responsive biomaterials have gained much attention in recent years but are not effective enough in killing the pathogens because of the complex mechanisms in bacteria. This review is focused on the development of highly efficient and specifically targeted biomaterials that release the antimicrobial agents or respond to bacteria on demands in body. The mechanisms of bacterial adhesion, biofilm formation, and antibiotic resistance are discussed, and the released substances accounting for implant infection are described. Strategies that have been used in past for the eradication of bacterial infections are also discussed. Different types of stimuli can be triggered only upon the existence of bacteria, leading to the release of antibacterial molecules that in turn kill the bacteria. In particular, the toxin-triggered, pH-responsive, and dual stimulus-responsive adaptive antibacterial biomaterials are introduced. Finally, the state of the art in fabrication of dual responsive antibacterial biomaterials and tissue integration in medical implants is discussed.
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Affiliation(s)
- W Ahmed
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - Z Zhai
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
| | - C Gao
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310027, China
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17
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Bi X, Zhai Z, Wang S. Identification of the key pathways and genes related to polycystic ovary syndrome using bioinformatics analysis. Gen Physiol Biophys 2019; 38:205-214. [DOI: 10.4149/gpb_2018049] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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18
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Muñoz MD, Della Vedova MC, Bushel PR, Ganini da Silva D, Mason RP, Zhai Z, Gomez Mejiba SE, Ramirez DC. The nitrone spin trap 5,5-dimethyl-1-pyrroline N-oxide dampens lipopolysaccharide-induced transcriptomic changes in macrophages. Inflamm Res 2018; 67:515-530. [PMID: 29589052 DOI: 10.1007/s00011-018-1141-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 01/17/2018] [Revised: 02/26/2018] [Accepted: 03/21/2018] [Indexed: 01/13/2023] Open
Abstract
OBJECTIVE M1-like inflammatory phenotype of macrophages plays a critical role in tissue damage in chronic inflammatory diseases. Previously, we found that the nitrone spin trap 5,5-dimethyl-1-pyrroline N-oxide (DMPO) dampens lipopolysaccharide (LPS)-triggered inflammatory priming of RAW 264.7 cells. Herein, we tested whether DMPO by itself can induce changes in macrophage transcriptome, and that these effects may prevent LPS-induced activation of macrophages. MATERIALS AND METHODS To test our hypothesis, we performed a transcriptomic and bioinformatics analysis in RAW 264.7 cells incubated with or without LPS, in the presence or in the absence of DMPO. RESULTS Functional data analysis showed 79 differentially expressed genes (DEGs) when comparing DMPO vs Control. We used DAVID databases for identifying enriched gene ontology terms and Ingenuity Pathway Analysis for functional analysis. Our data showed that DMPO vs Control comparison of DEGs is related to downregulation immune-system processes among others. Functional analysis indicated that interferon-response factor 7 and toll-like receptor were related (predicted inhibitions) to the observed transcriptomic effects of DMPO. Functional data analyses of the DMPO + LPS vs LPS DEGs were consistent with DMPO-dampening LPS-induced inflammatory transcriptomic profile in RAW 264.7. These changes were confirmed using Nanostring technology. CONCLUSIONS Taking together our data, surprisingly, indicate that DMPO by itself affects gene expression related to regulation of immune system and that DMPO dampens LPS-triggered MyD88- and TRIF-dependent signaling pathways. Our research provides critical data for further studies on the possible use of DMPO as a structural platform for the design of novel mechanism-based anti-inflammatory drugs.
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Affiliation(s)
- M D Muñoz
- Laboratory of Experimental and Translational Medicine, IMIBIO-SL-School of Chemistry, Biochemistry and Pharmacy, National University of San Luis-CONICET, San Luis, 5700, San Luis, Argentina.,Laboratory of Experimental Therapeutics, School of Health Sciences-IMIBIO-SL, CONICET-National University of San Luis, San Luis, 5700, San Luis, Argentina
| | - M C Della Vedova
- Laboratory of Experimental and Translational Medicine, IMIBIO-SL-School of Chemistry, Biochemistry and Pharmacy, National University of San Luis-CONICET, San Luis, 5700, San Luis, Argentina.,Laboratory of Experimental Therapeutics, School of Health Sciences-IMIBIO-SL, CONICET-National University of San Luis, San Luis, 5700, San Luis, Argentina
| | - P R Bushel
- Biostatistics and Computational Biology Branch, NIEHS, NIH, USDHHS, RTP, Durham, 27709, NC, USA
| | - D Ganini da Silva
- Immunity, Inflammation and Disease Laboratory, NIEHS, NIH, USDHHS, RTP, Durham, 27709, NC, USA
| | - R P Mason
- Immunity, Inflammation and Disease Laboratory, NIEHS, NIH, USDHHS, RTP, Durham, 27709, NC, USA
| | - Z Zhai
- Department of Dermatology, University of Colorado Denver, Aurora, 80045, CO, USA
| | - S E Gomez Mejiba
- Laboratory of Experimental Therapeutics, School of Health Sciences-IMIBIO-SL, CONICET-National University of San Luis, San Luis, 5700, San Luis, Argentina.
| | - D C Ramirez
- Laboratory of Experimental and Translational Medicine, IMIBIO-SL-School of Chemistry, Biochemistry and Pharmacy, National University of San Luis-CONICET, San Luis, 5700, San Luis, Argentina.
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Niu J, Zhai Z, Hao F, Zhang Y, Song Z, Zhong H. Dissection of a circulating CD3 + CD20 + T cell subpopulation in patients with psoriasis. Clin Exp Immunol 2018; 192:206-212. [PMID: 29377068 DOI: 10.1111/cei.13106] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [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: 01/17/2018] [Indexed: 12/26/2022] Open
Abstract
CD3+ CD20+ T cells are a population of CD3+ T cells that express CD20 and identified in healthy donors and autoimmune diseases. However, the nature and role of these cells in patients with psoriasis remain unclear. In this study, we aimed to investigate the level, phenotype, functional and clinical relevance of CD3+ CD20+ T cells in the peripheral blood of patients with psoriasis. We found that a small subset of CD3+ T cells expressed CD20 molecule in the peripheral blood of patients with psoriasis, and their levels were similar to those in healthy donors. Circulating CD3+ CD20+ T cells in patients with psoriasis were enriched in CD4+ cells and displayed an activated effector phenotype, as these cells contained fewer CD45RA+ -naive and CCR7+ cells with increased activity than those of CD3+ T cells lacking CD20. In addition, compared with healthy donors, circulating CD3+ CD20+ T cells in patients with psoriasis produced more cytokines, interleukin (IL)-17A, tumour necrosis factor (TNF)-α and IL-21, but not IL-4 and IFN-γ. Furthermore, a significantly positive correlation was found between the levels of IL-17A, TNF-α and IL-21-production CD3+ CD20+ T cells with Psoriasis Area and Severity Index scores. Our findings suggest that CD3+ CD20+ T cells may play a role in the pathogenesis of psoriasis.
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Affiliation(s)
- J Niu
- Department of Dermatology, General Hospital of Shenyang Military, Shenyang, Liaoning, China.,Department of Dermatology, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Z Zhai
- Department of Dermatology, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - F Hao
- Department of Dermatology, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Y Zhang
- Department of Dermatology, General Hospital of Shenyang Military, Shenyang, Liaoning, China
| | - Z Song
- Department of Dermatology, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - H Zhong
- Department of Dermatology, Southwest Hospital, Third Military Medical University, Chongqing, China.,Department of Zhonghua Clinic in Liangjiang New Area, Chongqing, China
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Chen Q, Zhong H, Chen W, Zhai Z, Zhou Z, Song Z, Hao F. Different expression patterns of plasma Th1-, Th2-, Th17- and Th22-related cytokines correlate with serum autoreactivity and allergen sensitivity in chronic spontaneous urticaria. J Eur Acad Dermatol Venereol 2017; 32:441-448. [PMID: 28846158 DOI: 10.1111/jdv.14541] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 08/03/2017] [Indexed: 01/06/2023]
Affiliation(s)
- Q. Chen
- Department of Dermatology; Southwest Hospital; Third Military Medical University; Chongqing China
| | - H. Zhong
- Department of Dermatology; Southwest Hospital; Third Military Medical University; Chongqing China
| | - W.C. Chen
- IZZ-Immunologie Zentrum Zürich; Zurich Switzerland
- Department of Dermatology and Allergy; Technische Universität MUnchen; Munich Germany
| | - Z. Zhai
- Department of Dermatology; Southwest Hospital; Third Military Medical University; Chongqing China
| | - Z. Zhou
- Department of Dermatology; Southwest Hospital; Third Military Medical University; Chongqing China
| | - Z. Song
- Department of Dermatology; Southwest Hospital; Third Military Medical University; Chongqing China
| | - F. Hao
- Department of Dermatology; Southwest Hospital; Third Military Medical University; Chongqing China
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21
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Zhai Z, Wang Z, Wang L, Chen S, Ren H, Wang D. Relationship between inducible NOS single-nucleotide polymorphisms and hypertension in Han Chinese. Herz 2017; 43:461-465. [PMID: 28685250 DOI: 10.1007/s00059-017-4591-0] [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] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 05/31/2017] [Accepted: 06/05/2017] [Indexed: 11/24/2022]
Abstract
BACKGROUND Inducible nitric oxide synthase (iNOS) single-nucleotide polymorphisms have been reported to confer susceptibility to hypertension, but no consensus has been reached. The aim of this study was to investigate the association between iNOS and hypertension in a Chinese population. METHODS This was a case-control study including 1172 hypertensive and 1172 control subjects to investigate the association between iNOS and hypertension. RESULTS There were significant differences in the distribution of genotype and allele frequencies of rs2779249 and rs2297518 between hypertensive and normotensive subjects. Logistic regression analyses were performed with different genetic models (additive, dominant, recessive) adjusting for confounding risk covariates, including age, sex, body mass index, total cholesterol, triglycerides, high-density lipoprotein cholesterol, low-density lipoprotein cholesterol, smoking, drinking, and family history of hypertension. The odds ratio (OR) was 1.27 (1.12, 1.44) in the additive model, 1.31 (1.09, 1.59) in the dominant, and 1.68 (1.28, 2.19) in the recessive model of rs2779249; the OR was 1.26 (1.06, 1.50) in the additive model and 1.46 (1.13, 1.89) in the dominant model of rs2297518. CONCLUSION The current study provides evidence that iNOS is strongly associated with hypertension.
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Affiliation(s)
- Z Zhai
- Department of Cardiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430030, Wuhan, Hubei, China.,Department of Cardiology, First Affiliated Hospital, Shihezi Medical College, Shihezi University, 832000, Shihezi, Xinjiang, China
| | - Z Wang
- Department of Cardiology, First Affiliated Hospital, Shihezi Medical College, Shihezi University, 832000, Shihezi, Xinjiang, China.
| | - L Wang
- Department of Cardiology, First Affiliated Hospital, Shihezi Medical College, Shihezi University, 832000, Shihezi, Xinjiang, China
| | - S Chen
- Department of Cardiology, First Affiliated Hospital, Shihezi Medical College, Shihezi University, 832000, Shihezi, Xinjiang, China
| | - H Ren
- Department of Cardiology, First Affiliated Hospital, Shihezi Medical College, Shihezi University, 832000, Shihezi, Xinjiang, China
| | - D Wang
- Department of Cardiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 430030, Wuhan, Hubei, China
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Samson J, Li Y, Pearson D, Luo Y, Zhai Z, Dinarello C, Fujita M. 809 Alpha-1 antitrypsin suppresses melanoma progression through immunological effects in the tumor microenvironment. J Invest Dermatol 2017. [DOI: 10.1016/j.jid.2017.02.834] [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: 11/16/2022]
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Chen Q, Zhai Z, Xu J, Chen W, Chen S, Zhong H, Huang X, Hao F, Song Z. Basophil CD63 expression in chronic spontaneous urticaria: correlation with allergic sensitization, serum autoreactivity and basophil reactivity. J Eur Acad Dermatol Venereol 2016; 31:463-468. [PMID: 27518369 DOI: 10.1111/jdv.13912] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 07/18/2016] [Indexed: 11/28/2022]
Affiliation(s)
- Q. Chen
- Department of Dermatology; Southwest Hospital; Third Military Medical University; Chongqing China
| | - Z. Zhai
- Department of Dermatology; Southwest Hospital; Third Military Medical University; Chongqing China
| | - J. Xu
- Department of Dermatology; Southwest Hospital; Third Military Medical University; Chongqing China
| | - W. Chen
- IZZ Immunologie-Zentrum Zürich; Zürich Switzerland
- Department of Dermatology and Allergy; Technische Universität München; Munich Germany
| | - S. Chen
- Department of Dermatology; Southwest Hospital; Third Military Medical University; Chongqing China
| | - H. Zhong
- Department of Dermatology; Southwest Hospital; Third Military Medical University; Chongqing China
| | - X. Huang
- Department of Dermatology; Southwest Hospital; Third Military Medical University; Chongqing China
| | - F. Hao
- Department of Dermatology; Southwest Hospital; Third Military Medical University; Chongqing China
| | - Z. Song
- Department of Dermatology; Southwest Hospital; Third Military Medical University; Chongqing China
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Yu X, Zhai Z, Yan J, Ouyang W. Abstract PR579. Anesth Analg 2016. [DOI: 10.1213/01.ane.0000492960.70010.e3] [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: 11/05/2022]
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Zhai Z, Liu W, Luo Y, Kaur M, Shellman Y, Norris D, Dinarello C, Spritz R, Fujita M. 647 NLRP1 promotes tumor growth by enhancing inflammasome activation and suppressing caspase-3 activity in human melanoma. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.02.688] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Pearson D, Luo Y, Zhai Z, Couts K, Azam T, Dinarello C, Fujita M. 611 Alpha-1 antitrypsin suppresses melanoma growth by upregulating melanocyte differentiation antigens and enhancing T cell cytotoxicity. J Invest Dermatol 2016. [DOI: 10.1016/j.jid.2016.02.651] [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: 10/21/2022]
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Zhang QH, Zhai Z, Nie ZH, Harjo S, Cong DY, Wang MG, Li J, Wang YD. Anin situneutron diffraction study of anomalous superelasticity in a strain glass Ni43Fe18Ga27Co12alloy. J Appl Crystallogr 2015. [DOI: 10.1107/s1600576715011334] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Superelastic behavior is traditionally related to the martensitic transition with a collective transformation scenario in some shape memory alloys. A kind of quasi-linear superelasticity accompanied by a finite avalanche or confined martensitic transformation was recently found in some alloy systems with strain glass state. Here, anin situneutron diffraction technique was used to study the deformation behavior in an Ni43Fe18Ga27Co12alloy with strain glass state in order to reveal the new intrinsic physical nature of the quasi-linear superelasticity. A significant modulus softening prior to the stress-induced martensitic transformation was observed during compression in the studied alloy, which is similar to the characteristics exhibited in the tweed precursor phenomena prior to temperature-induced martensitic transformation. Moreover, the diffraction peak broadening was further shown during the elastic stage of deformation for both single-crystal and polycrystalline samples, which mainly stems from the short-range fluctuation in the strain field inside each grain based on Williamson–Hall analysis. The authors believe that there exists a spatial heterogeneity in the modulus of the confined martensitic transformation alloy.
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Niu J, Song Z, Yang X, Zhai Z, Zhong H, Hao F. Increased circulating follicular helper T cells and activated B cells correlate with disease severity in patients with psoriasis. J Eur Acad Dermatol Venereol 2015; 29:1791-6. [PMID: 25712241 DOI: 10.1111/jdv.13027] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Accepted: 01/13/2015] [Indexed: 02/04/2023]
Abstract
BACKGROUND Follicular Helper T (TFH) Cells are a population of recently discovered CD4(+) T cells involved in autoimmune diseases. However, the contribution of TFH cells in patients with psoriasis remains unknown. OBJECTIVE We aimed to investigate the levels of TFH cells, B cells and their clinical relevance in patients with psoriasis. METHODS Using multi-colour flow cytometry, we detected different subsets of TFH cells and B cells in the peripheral blood of 27 patients with psoriasis and 13 healthy donors. Serum IL-21 levels were measured by ELISA. The relationship between the levels of TFH cells, IL-21, B cells and disease severity were analysed. RESULTS Compared with healthy donors, higher levels of circulating CD3(+) CD4(+) CXCR5(+) cells, CD3(+) CD4(+) CXCR5(+) ICOS(+), CD3(+) CD4(+) CXCR5(+) PD-1(+), CD3(+) CD4(+) CXCR5(+) ICOS(+) PD-1(+) TFH cells and CD19(+) IgD(+) CD27(-) naive B, CD19(+) CD86(+) activated B, but lower levels of CD19(+) IgD(+) CD27(+) preswitch and CD19(+) IgD(-) CD27(+) postswitch memory B cells, were observed in patients with psoriasis. In addition, serum IL-21 levels in patients with psoriasis were significantly higher than those in healthy donors, and showed to be positively correlated with the levels of different subsets of TFH cells, and the level of CD19(+) CD86(+) B cells was also correlated with TFH cells and IL-21 levels. Furthermore, a significant correlation was found between the levels of CD3(+) CD4(+) CXCR5(+) ICOS(+) TFH cells, CD3(+) CD4(+) CXCR5(+) ICOS(+) PD-1(+) TFH cells, CD19(+) CD86(+) B cells and IL-21 with Psoriasis Area and Severity Index scores. CONCLUSION The levels of TFH cells and activated B cells were increased in the peripheral blood of patients with psoriasis, and positively correlated with disease severity. These results suggest that TFH cells and activated B cells may play a role in the pathogenesis of psoriasis.
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Affiliation(s)
- J Niu
- Department of Dermatology, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Z Song
- Department of Dermatology, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - X Yang
- Department of Dermatology, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Z Zhai
- Department of Dermatology, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - H Zhong
- Department of Dermatology, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - F Hao
- Department of Dermatology, Southwest Hospital, Third Military Medical University, Chongqing, China
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Abstract
SUMMARY Loop diuretic use has been shown to be associated with an increased fracture risk, but the findings have been inconsistent. The present meta-analysis suggests that loop diuretics show a significant positive association with the overall risk of total fractures and, specifically, hip fractures. INTRODUCTION Despite being widely used, there is limited, prospective randomized trial evidence regarding the skeletal effects of loop diuretics. Previous observational studies have reported conflicting findings regarding the association between loop diuretic use and the risk of fractures. METHODS This meta-analysis of observational studies assessed the association between loop diuretic use and the risk of fractures. The PubMed, EMBASE, and OVID databases were searched for prospective cohort and case-control studies. Relative risks (RR) with 95% confidence intervals (CI) were derived using random-effects models throughout the analysis. RESULTS Thirteen studies (4 cohort studies and 9 case-control studies) were included, involving 842,644 participants and 108,247 fracture cases. Compared with non-users, people who had taken loop diuretics had an approximately 15% higher risk of total fractures (95% CI, 1.04-1.26; p<0.01), with high heterogeneity between studies (I2=80.5%; p<0.01). The RR was 1.14 (95% CI, 1.08-1.19) for hip fractures and 0.99 (95% CI, 0.93-1.05) for lower arm or wrist fractures. The RR was 1.05 (95% CI, 1.00-1.11) in prospective cohort studies and 1.22 (95% CI, 1.00-1.44) in case-control studies. There was no evidence of publication bias. CONCLUSION The results suggest that loop diuretics show a significant positive association with the overall risk of total fractures and hip fractures.
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Affiliation(s)
- F Xiao
- Shanghai Key Laboratory of Orthopedic Implants, Department of Orthopedics, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 639 Zhizaoju Road, Shanghai, 200011, China
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Sheng J, Qu X, Zhang X, Zhai Z, Li H, Liu X, Li H, Liu G, Zhu Z, Hao Y, Qin A, Dai K. Coffee, tea, and the risk of hip fracture: a meta-analysis. Osteoporos Int 2014; 25:141-50. [PMID: 24196722 DOI: 10.1007/s00198-013-2563-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [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] [Received: 05/07/2013] [Accepted: 10/16/2013] [Indexed: 10/26/2022]
Abstract
UNLABELLED The present meta-analysis shows no clear association between coffee consumption and the risk of hip fractures. There was a nonlinear association between tea consumption and the risk of hip fracture. Compared to no tea consumption, drinking 1-4 cups of tea daily was associated with a lower risk of hip fracture. INTRODUCTION Prospective cohort and case-control studies have suggested that coffee and tea consumption may be associated with the risk of hip fracture; the results have, however, been inconsistent. We conducted a meta-analysis to assess the association between coffee and tea consumption and the risk of hip fracture. METHODS We performed systematic searches using MEDLINE, EMBASE, and OVID until February 20, 2013, without limits of language or publication year. Relative risks (RRs) with 95% confidence intervals (CI) were derived using random-effects models throughout all analyses. We conducted categorical, dose-response, heterogeneity, publication bias, and subgroup analyses. RESULTS Our study was based on 195,992 individuals with 9,958 cases of hip fractures from 14 studies, including six cohort and eight case-control studies. The pooled RRs of hip fractures for the highest vs. the lowest categories of coffee and tea consumption were 0.94 (95% CI 0.71-1.17) and 0.84 (95% CI 0.66-1.02), respectively. For the dose-response analysis, we found evidence of a nonlinear association between tea consumption and the risk of hip fracture (p(nonlinearity) < 0.01). Compared to no tea consumption, 1-4 cups of tea per day may reduce the risk of hip fracture by 28% (0.72; 95% CI 0.56-0.88 for 1-2 cups/day), 37% (0.63; 95% CI 0.32-0.94 for 2-3 cups/day), and 21% (0.79; 95% CI 0.62-0.96 for 3-4 cups/day). CONCLUSIONS We found no significant association between coffee consumption and the risk of hip fracture. A nonlinear association emerged between tea consumption and the risk of hip fracture; individuals drinking 1-4 cups of tea per day exhibited a lower risk of hip fractures than those who drank no tea. The association between 5 daily cups of tea, or more, and hip fracture risk should be investigated.
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Affiliation(s)
- J Sheng
- Department of Geriatrics, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
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Abstract
Magnetic resonance imaging (MRI) methods safely provide in vivo indicators of cerebral macrostructure, microstructure, and activation that can be examined in relation to substance use disorder (SUD) risks and effects. This article will provide an overview of MRI approaches, including volumetric measures, diffusion tensor imaging, and functional MRI, that have been applied to studies of adolescent neuromaturation in relationship to risk phenotypes and adolescent SUD. To illustrate these applications, examples of research findings will be presented. MRI indicators have demonstrated that neurobiological maturation continues throughout adolescence. MRI research has suggested that variations in neurobiological maturation may contribute to SUD risk, and that substance use adversely influences adolescent brain development. Directly measured neurobiological variables may be viable preventive intervention targets and outcome indicators. Further research is needed to provide definitive findings on neurodevelopmental immaturity as an SUD risk and to determine the directions such observations suggest for advancing prevention science.
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Affiliation(s)
- D B Clark
- School of Medicine and the School of Pharmacy, University of Pittsburgh, Pittsburgh, PA, USA.
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Song Z, Hua Z, You Y, Zhai Z, Yan H. A case of borderline leprosy presenting with urticaria-like eruptions: are there lessons to be learned for allergists? Allergy 2011; 66:1622-4. [PMID: 21988321 DOI: 10.1111/j.1398-9995.2011.02733.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Z Song
- Department of Dermatology, Southwest Hospital, Third Military Medical University, Chongqing China.
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Zhai Z, Murphy K, Tighe H, Wang C, Wilkins M, Gibbs S, Howard LS. S98 Ventilatory efficiency in pulmonary arterial hypertension and chronic thromboembolic pulmonary hypertension: physiological differences and implications for disease-specific end-points. Thorax 2010. [DOI: 10.1136/thx.2010.150938.49] [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: 11/04/2022]
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Hao Y, Zhao L, Zhang H, Zhai Z, Huang Y, Liu X, Zhang L. Identification of the bacterial biodiversity in koumiss by denaturing gradient gel electrophoresis and species-specific polymerase chain reaction. J Dairy Sci 2010; 93:1926-33. [PMID: 20412906 DOI: 10.3168/jds.2009-2822] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2009] [Accepted: 01/22/2010] [Indexed: 11/19/2022]
Abstract
Bacterial biodiversity in traditional koumiss fermented milk was studied by denaturing gradient gel electrophoresis (DGGE). Target DNA bands were identified according to the reference species ladder, constructed in this study. Comigrating bands present in the DGGE profiles were resolved by species-specific PCR. The results revealed a novel bacterial profile and extensive bacterial biodiversity in koumiss. The dominant lactic acid bacteria included Lactobacillus acidophilus, Lactobacillus helveticus, Lactobacillus fermentum, and Lactobacillus kefiranofaciens. Frequently encountered bacterial species were Enterococcus faecalis, Lactococcus lactis, Lactobacillus paracasei, Lactobacillus kitasatonis, and Lactobacillus kefiri. Leuconostoc mesenteroides, Streptococcus thermophilus, Lactobacillus buchneri, and Lactobacillus jensenii were occasionally found in this product. In addition, L. buchneri, L. jensenii, and L. kitasatonis, which were never previously isolated by culture-dependent methods, were identified for the first time in the Xinjiang koumiss. Furthermore, conventional cultivation was performed by plating samples on M17, de Man-Rogosa-Sharpe, Halligan-Pearce, and Kenner fecal media. The results revealed that lactobacilli were the dominant species in the koumiss ecosystem, which was consistent with the results obtained by the DGGE analysis. This is the first systematic study of the microbial composition in koumiss, and our findings will be helpful in selecting appropriate strains for the manufacture of this product at the industrial level.
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Affiliation(s)
- Y Hao
- College of Food Science and Nutritional Engineering, China Agricultural University, 17 Qing Hua East Road, Hai Dian District, Beijing, China 100083
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Sun W, Wang D, Zhai Z, Gao R, Jiao K. Direct electrochemistry of hemoglobin immobilized in the sodium alginate and SiO2 nanoparticles bionanocomposite film on a carbon ionic liquid electrode. JICS 2009. [DOI: 10.1007/bf03245852] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Qian Y, Li S, Ye S, Chen Y, Zhai Z, Chen K, Yang G. Renoprotective effect of rosiglitazone through the suppression of renal intercellular adhesion molecule-1 expression in streptozotocin-induced diabetic rats. J Endocrinol Invest 2008; 31:1069-74. [PMID: 19246972 DOI: 10.1007/bf03345654] [Citation(s) in RCA: 8] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To observe the effect of rosiglitazone on serum intercellular adhesion molecule-1 (SICAM-1) level, urinary excretion of ICAM-1, and renal expression of ICAM-1, and investigate its possible renoprotective mechanisms in diabetic rats. METHOD Twenty-four Wistar Rats were divided into 3 groups: non-diabetic control rats (group A, no.=8), streptozotocin-induced diabetic rats (group B, no.=8), and diabetic rats treated with rosiglitazone (group C, no.=8). Rats in group C were treated with rosiglitazone (5 mg x kg(-1) x d(-1)) 1 week after the establishment of diabetic model, group A and B were treated with corresponding sodium chloride. Peripheral blood glucose was tested weekly. Glycosylated hemoglobin (HbA1c) and SICAM-1 as well as urinary albumin excretion rate (UAER), urinary retinol binding-protein (URBP) excretion rate, and urinary ICAM-1 (UICAM- 1) excretion rate were tested at the 8th week, and the renal tissues of all rats were obtained for evaluating kidney/body weight ratio, observing pathologic change via electron microscope, and for examining the expression of ICAM-1 mRNA by reverse transcriptase-PCR. RESULTS At the 8th week, the blood glucose, HbA1c levels, UAER, URBP excretion rate, kidney/body weight ratio and serum, urinary ICAM-1 levels all increased significantly in group B and group C in comparison with group A; however, the above-mentioned parameters in group C (except the blood glucose and HbA1c levels) were much lower than those in group B. In addition, both SICAM-1 and UICAM-1 were highly correlated with the UAER, URBP level, and kidney/body weight ratio in all rats; renal pathological lesions observed by electron microscope in group C were much lighter than those of group B; compared with group A, the expression of ICAM-1 mRNA was markedly up-regulated in group B and group C, and rosiglitazone was able to decrease the expression of ICAM-1 mRNA in the renal tissue. CONCLUSION Rosiglitazone could definitely protect against the renal injury of diabetic rats, which may be partly associated with decreasing the expression of ICAM-1 in the renal tissue, reducing ICAM-1 productions in both serum and urine.
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Affiliation(s)
- Y Qian
- Department of Endocrinology, Anhui Provincial Hospital, Hefei, China
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Cai S, Zhai Z. Relation between nuclear envelope and nuclear lamina in nuclear assembly in vitro. Sci China C Life Sci 2008; 40:576-82. [PMID: 18726281 DOI: 10.1007/bf02882687] [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] [Received: 02/01/1997] [Indexed: 10/22/2022]
Abstract
Xenopus laevis egg extracts cell-free nuclear assembly system was used as an experimental model to study the process of nuclear lamina assembly in nuclear reconstitution in vitro. The experimental results showed that lamin was involved in the nuclear assembly in vitro. The assembly of nuclear lamina was preceded by the assembly of nuclear matrix, and probably, inner nuclear matrix assembly provided the basis for nuclear lamina assembly. Inhibition of normal assembly of nuclear lamina, by preincubating egg extracts cell-free system with anti-lamin antibodies, resulted in abnormal assembly of nuclear envelope, suggesting that nuclear envelope assembly is closely associated with nuclear lamina assembly.
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Affiliation(s)
- S Cai
- Life Sciences College of Peking University, Beijing, China
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Chen J, Shen Y, Jiao R, Zhai Z. Composition and structure of nucleolar skeleton (nucleolar matrix) : Actin and fibrillarin are two main protein components of nucleolar skeleton. Sci China C Life Sci 2008; 42:34-42. [PMID: 18726495 DOI: 10.1007/bf02881745] [Citation(s) in RCA: 4] [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] [Received: 05/15/1998] [Indexed: 11/25/2022]
Abstract
Purified nucleoli of HeLa cells were treated sequentially with nonionic detergent, nucleic acid enzyme, low salt and high salt. The residual nucleolar structure termed nucleolar skeleton (nucleolar matrix) was shown as a fine network under electron microscope with DGD embedding-unembedding technique. Such structures of BHK-21 cell and mouse liver cell are similar to that of HeLa cell. The protein composition of the nucleolar skeleton of HeLa cells was analyzed. The protein composition of such nucleolar residual shows obvious difference from the compositions of nuclear matrix and chromosome scaffold. The major protein composition of the nucleolar skeleton of HeLa cells contains 6-7 polypeptides. Their molecular weights are about 48, 43, 36 and 33 ku. Further studies show that actin and fibrillarin are two major protein components of nucleolar skeleton of HeLa cells.
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Affiliation(s)
- J Chen
- Peking University, Beijing, China
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Tong X, Zhai Z, Chen J. Coil-1 of rod domain of NF-L is essential for its assemblyin vivo. Sci China C Life Sci 2008; 42:449-56. [PMID: 18726507 DOI: 10.1007/bf02881767] [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: 10/28/1998] [Indexed: 11/28/2022]
Abstract
Neurofilaments take highly ordered structures composed of parallel mays of 10 nm filaments linked to each other with frequent cross-bridge. It is composed of three components named NF-L, NF-M and NF-H. NF-L is able to form filamentous network alone in Sf9 cells, while M could not. To identify which domain is essential for the assembly of NF-L, two chimera proteins named ML and MML were constructed: ML was composed of the head domain of NF-M and other domains of NF-L; MML was composed of the head and Coil-1 domains of NF-M and Coil-2 and tail domains of NF-L. ML was not only able to form filaments in Sf9 cells, but also co-assemble with NF-M into parallel filamentous bundles. MML could not assemble into filaments. Thus the Coil-1 domain of NF-L was essential for its assembly.
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Affiliation(s)
- X Tong
- College of Life Sciences, Peking University, 100871, Beijing, China
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Liu X, Zhai Z. Location identification for indoor instantaneous point contaminant source by probability-based inverse Computational Fluid Dynamics modeling. Indoor Air 2008; 18:2-11. [PMID: 18211477 DOI: 10.1111/j.1600-0668.2007.00499.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
UNLABELLED Indoor pollutions jeopardize human health and welfare and may even cause serious morbidity and mortality under extreme conditions. To effectively control and improve indoor environment quality requires immediate interpretation of pollutant sensor readings and accurate identification of indoor pollution history and source characteristics (e.g. source location and release time). This procedure is complicated by non-uniform and dynamic contaminant indoor dispersion behaviors as well as diverse sensor network distributions. This paper introduces a probability concept based inverse modeling method that is able to identify the source location for an instantaneous point source placed in an enclosed environment with known source release time. The study presents the mathematical models that address three different sensing scenarios: sensors without concentration readings, sensors with spatial concentration readings, and sensors with temporal concentration readings. The paper demonstrates the inverse modeling method and algorithm with two case studies: air pollution in an office space and in an aircraft cabin. The predictions were successfully verified against the forward simulation settings, indicating good capability of the method in finding indoor pollutant sources. The research lays a solid ground for further study of the method for more complicated indoor contamination problems. PRACTICAL IMPLICATIONS The method developed can help track indoor contaminant source location with limited sensor outputs. This will ensure an effective and prompt execution of building control strategies and thus achieve a healthy and safe indoor environment. The method can also assist the design of optimal sensor networks.
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Affiliation(s)
- X Liu
- Department of Civil, Environmental and Architectural Engineering, University of Colorado, Boulder, CO 80309-0428, USA
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Abstract
UNLABELLED Reduction in indoor environment quality calls for effective control and improvement measures. Accurate and prompt identification of contaminant sources ensures that they can be quickly removed and contaminated spaces isolated and cleaned. This paper discusses the use of inverse modeling to identify potential indoor pollutant sources with limited pollutant sensor data. The study reviews various inverse modeling methods for advection-dispersion problems and summarizes the methods into three major categories: forward, backward, and probability inverse modeling methods. The adjoint probability inverse modeling method is indicated as an appropriate model for indoor air pollutant tracking because it can quickly find source location, strength and release time without prior information. The paper introduces the principles of the adjoint probability method and establishes the corresponding adjoint equations for both multi-zone airflow models and computational fluid dynamics (CFD) models. The study proposes a two-stage inverse modeling approach integrating both multi-zone and CFD models, which can provide a rapid estimate of indoor pollution status and history for a whole building. Preliminary case study results indicate that the adjoint probability method is feasible for indoor pollutant inverse modeling. PRACTICAL IMPLICATIONS The proposed method can help identify contaminant source characteristics (location and release time) with limited sensor outputs. This will ensure an effective and prompt execution of building management strategies and thus achieve a healthy and safe indoor environment. The method can also help design optimal sensor networks.
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Affiliation(s)
- X Liu
- Department of Civil, Environmental and Architectural Engineering, University of Colorado, Boulder, CO 80309-0428, USA
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Abstract
BACKGROUND We recently demonstrated that platelet aggregation occurred in fibrinogen-deficient mice. In these animals, platelet fibronectin (Fn) content was increased 3-5 fold, suggesting that Fn may also be involved in platelet aggregation. METHODS AND RESULTS We compared platelet Fn content from a severe hypofibrinogenemic patient (with approximately 0.5% of normal fibrinogen levels) with his parents (heterozygous) and healthy donors. A significant increase in the patient's platelet Fn content was detected by immunoblot, flow cytometry, and immunoelectron microscopy (IEM). To examine the possible contribution of platelet Fn to platelet aggregation, we examined cell-surface Fn expression after thrombin treatment. Unexpectedly, IEM detected only trace amounts of Fn retained on the patient's platelet surface, and flow cytometry indicated that surface Fn was approximately 6-fold lower than that of his parents and tenfold lower than that of healthy donors. An ELISA further confirmed that the patient's platelet Fn was primarily released into the extracellular medium. To test whether retention of surface Fn was due to fibrin formation on the platelet surface, an antifibrin antibody (T2 G1) was employed. Fibrin was detected on platelets from healthy donors and from the father, but was negligible on the patient's platelets. Consistent with these data, when gel-filtered platelets of healthy donors were treated with thrombin receptor activation peptide (SFLLRN-NH(2); no conversion of fibrinogen to fibrin), little surface Fn was detected. CONCLUSION Fibrinogen not only competitively inhibits human platelet Fn internalization but also controls platelet-surface Fn retention via fibrin formation. The Fn-fibrin interaction is one possible mechanism to promote Fn interaction with platelets.
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Affiliation(s)
- Z Zhai
- The Center Laboratory, and Department of Hematology of Anhui Provincial Hospital, the Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China.
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Abstract
Polo-like kinase 1 (Plk1) is a highly conserved serine/threonine kinase that plays critical roles in many cell cycle events, especially in mitosis. In the present study, we identified TTDN1 as a potential interacting partner of Plk1 in yeast two-hybrid screens. Sequence analysis indicates that TTDN1 contains a consensus Plk1-binding motif at its C terminus. TTDN1 colocalizes with Plk1 at the centrosome in mitosis and the midbody during cytokinesis. TTDN1 is phosphorylated by Cdk1 in mitosis, and this is required for its interaction with Plk1. Site-directed mutagenesis indicates that TTDN1 is phosphorylated at multiple residues, including Ser93 and Ser104. Mutation of Thr120 of TTDN1 abolishes its interaction with Plk1, suggesting phosphorylation of Thr120 in the consensus Plk1-binding motif is required for its interaction with Plk1. Overexpression of TTDN1 or its knockdown by siRNA causes multi-polar spindles and multiple nuclei, suggesting that TTDN1 plays a role in regulating mitosis and cytokinesis.
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Affiliation(s)
- Y Zhang
- College of Life Sciences, Peking University, Beijing, 100871, China
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44
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Huang D, Zhai Z, Lu YC, Yang LM, Luo GS. Optimization of Composition of a Directly Combined Catalyst in Dibenzothiophene Oxidation for Deep Desulfurization. Ind Eng Chem Res 2007. [DOI: 10.1021/ie0611857] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- D. Huang
- The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
| | - Z. Zhai
- The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
| | - Y. C. Lu
- The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
| | - L. M. Yang
- The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
| | - G. S. Luo
- The State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University, Beijing, 100084, China
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45
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Zhai Z, Mei J, You J, Yao M, Xiao S. [Effect of artemether on nucleoside uptake and nucleic acid content in Schistosoma japonicum]. Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi 2003; 17:231-4. [PMID: 12563772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
AIM To observe the effect of artemether (Art) on nucleoside uptake and nucleic acid content in Schistosoma japonicum. METHODS RNA and DNA contents of both male and female worms harbored in mice treated intragastrically (i.g.) with Art 300 mg/kg for 24 h or 48 h were determined, respectively. After in vivo drug treatment, the schistosomes recovered were in vitro maintained in drug-free medium containing [3H]adenosine, [5-(3)H] uridine or [methyl-3H]thymidine at a final concentration of 37 MBq/L or 74 MBq/L for 2 h or 4 h, the tritiated nucleoside uptake and incorporation into nucleic acid of schistosomes were measured. RESULTS The RNA and DNA contents of female worms recovered from the host 48 h after dosing were markedly decreased by 51.6% and 23.5%, respectively, while the RNA content of male worms showed 42.4% reduction. When the above-mentioned schistosomes were in vitro exposed to the tritiated nucleoside for 2 h or 4 h, apparent decrease in tritiated nucleoside uptake with reduction rates of 35.2%-50.1% was seen in female worms. The incorporation of [methyl-3H]thymidine into the female worm DNA 2 h after incubation was reduced by 71.4% while the incorporation of [3H]adenosine into the female worm RNA and DNA 4 h after incubation was reduced by 65.2% and 50.0%, respectively. CONCLUSION Art exhibited an apparent effect on the nucleic acid metabolism in schistosomes, especially in female worms.
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Affiliation(s)
- Z Zhai
- Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, Shanghai 200025
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46
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Gao J, Zhai Z. Advances in experimental studies on albendazole and other drugs against hydatid disease. Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi 2003; 17:178-83. [PMID: 12563841] [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] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Affiliation(s)
- J Gao
- Shenyang Sixth People's Hospital, Shenyang 11000
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47
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Zhai Z. Urbanization and the aging of urban population in China: trend and countermeasures. Chin J Popul Sci 2002; 9:35-44. [PMID: 12320982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
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48
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Wei J, Yang S, Xu Z, Cheng H, Zhai Z, Li B, Yang X, Jiang X. [Study on variation and interrelations of characteristics at ginseng germplasms]. Zhong Yao Cai 2001; 24:703-5. [PMID: 11822279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
The variation and interrelations of some characteristics of Panax ginseng germplasms(lines), which were five selfmating generations of some single plants were studied. Methods of multivariate analysis, such as correlation, regression, or clustering, and coefficient of variation were used. The results were of benefit to the breeding and standardized planting of Panax ginseng.
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Affiliation(s)
- J Wei
- Institute of Medicinal Plant, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100094
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49
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Abstract
The characteristic morphological and biochemical changes during caspase-mediated apoptosis can be reproduced to a large extent in a Xenopus laevis egg extract cell-free system by addition of mouse liver nuclei and exogenous cytochrome c. We show that in this system phosphocreatine accelerated the apoptotic morphological changes of the nuclei, but selectively inhibited DNA fragmentation. Western blot showed that the degradation of lamins A and C is accelerated, which is possibly responsible for the nuclear changes during cell apoptosis. However, the degradation of ICAD/DFF45-like protein in the egg extracts is inhibited in a time-dependent manner. Exogenous creatine, ATP, and several organic acids have no effect on DNA fragmentation, excluding the possibility that creatine, ATP, or acidic conditions resulting from phosphocreatine are responsible for inhibiting DNA fragmentation. Lithium chloride, a kinase inhibitor, can overcome the phosphocreatine effects and can restore DNA fragmentation. Our results indicate that phosphocreatine protects ICAD/DFF45-like protein from proteolysis, probably through kinase actions, resulting in its resistance to caspase cleavage and leading to an inhibition of DNA fragmentation.
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Affiliation(s)
- Y Zhao
- College of Life Sciences, Peking University, Beijing 100871, Peoples Republic of China
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50
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Abstract
It is commonly believed that incompatible plasmids carrying the same replicon cannot coexist stably in one Escherichia coli cell. However, we found that two incompatible plasmids carrying different antibiotic resistance genes, if under the selection pressure of the two antibiotics, can coexist in E. coli for at least 14 h, which is adequate for routine culture and protein expression. Based on this discovery, we developed a new method to coexpress foreign proteins in E. coli using two incompatible plasmids. The coding regions of the two subunits (DFF45 and DFF40) of the human DNA fragmentation factor (DFF) were cloned into two incompatible bacterial expression vectors-pET-21a with ampicillin resistance and pET-28a with kanamycin resistance, respectively. The two resulting plasmids were used to cotransform E. coli BL21(DE3) cells. After selection by ampicillin and kanamycin simultaneously, cotransformants that contain both recombinant plasmids were obtained. Induced by isopropyl beta-d-thiogalactoside, DFF45, and DFF40 were coexpressed efficiently in the presence of the two antibiotics. The coexpression product contained adequate soluble portions for both DFF45 and DFF40, while all DFF40 was insoluble if expressed alone. The coexpression product also exhibited the same caspase-activated DNase activity as its natural counterparts, which cannot be obtained if its two subunits are expressed separately.
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Affiliation(s)
- W Yang
- College of Life Sciences, Peking University, Beijing 100871, People's Republic of China
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