1
|
Feng M, Qin B, Luo F, Zhu X, Liu K, Li K, Wu D, Chen G, Tang X. Qingjie Huagong decoction inhibits pancreatic acinar cell pyroptosis by regulating circHipk3/miR-193a-5p/NLRP3 pathway. Phytomedicine 2024; 126:155265. [PMID: 38422649 DOI: 10.1016/j.phymed.2023.155265] [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] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Revised: 11/04/2023] [Accepted: 12/06/2023] [Indexed: 03/02/2024]
Abstract
BACKGROUND Safer and more effective drugs are needed for the treatment of acute pancreatitis (AP). Qingjie Huagong decoction (QJHGD) has been applied to treat AP for many years and has shown good clinical effects. However, the potential mechanism has not yet been determined. PURPOSE To investigate the role and underlying mechanism of the effects of QJHGD on AP both in vitro and in vivo. METHODS QJHGD was characterized by UHPLC-Q-Orbitrap-MS. The protective effect of QJHDG and the underlying mechanism were investigated in MPC-83 cells in vitro. A caerulein-induced AP model was established to evaluate the protective effect of QJHGD in mice. CCK-8 assays were used to detect cell viability. The contents of inflammatory mediators were determined by ELISA. Expression levels of circRNA, miRNA and mRNA were determined by qRT-PCR. Protein expression was determined using Western blot. Pancreatic tissues were assessed by hematoxylin and eosin staining as well as immunohistochemical and immunofluorescence analyses. Pull-down and luciferase activity assays were performed to determine the regulatory relationships of circHipk3, miR-193a-5p and NLRP3. RESULTS Our results confirmed that mmu-miR-193a-5p was sponged by mmu-circHipk3, and NLRP3 was a target of miR-193a-5p. In vitro experiments showed that QJHGD enhanced MPC-83 cell viability by regulating circHipk3 sponging mir-193a-5 targeting NLRP3 and inhibiting pyroptosis-related factors. Finally, we showed that QJHGD ameliorated pancreatic tissue injury in AP mice via this pathway. CONCLUSION This study demonstrate that QJHDG exerted its anti-AP effects via the circHipk3/miR-193a-5p/NLRP3 pathway, revealing a novel mechanism for the therapeutic effect of QJHDG on AP.
Collapse
Affiliation(s)
- MinChao Feng
- The First Clinical School of Medicine, Guangxi University of Traditional Chinese Medicine, Nanning 530000, China
| | - BaiJun Qin
- Department of Gastroenterology, Chongqing Traditional Chinese Medicine Hospital, Chongqing 400021, China
| | - Fang Luo
- The First Clinical School of Medicine, Guangxi University of Traditional Chinese Medicine, Nanning 530000, China
| | - XiaoDong Zhu
- The First Clinical School of Medicine, Guangxi University of Traditional Chinese Medicine, Nanning 530000, China
| | - KunRong Liu
- Department of Gastroenterology, The First Affiliated Hospital of Guangxi University of Traditional Chinese Medicine, 89-9 Dongge Road, Nanning 530023, China
| | - Kai Li
- The First Clinical School of Medicine, Guangxi University of Traditional Chinese Medicine, Nanning 530000, China
| | - DongYang Wu
- School of Pharmacy, Guangxi University of Traditional Chinese Medicine, Nanning 530000, China
| | - GuoZhong Chen
- Department of Gastroenterology, The First Affiliated Hospital of Guangxi University of Traditional Chinese Medicine, 89-9 Dongge Road, Nanning 530023, China.
| | - XiPing Tang
- Endoscopy Center, Guangxi Medical University Cancer Hospital, 71 Hedi Road, Nanning 530021, China.
| |
Collapse
|
2
|
Wu DY, Feng L, Hao XY, Huang SB, Wu ZF, Ma S, Yin YL, Tan CQ. Effects of dietary supplementation of gestating sows with adenosine 5 '-monophosphate or adenosine on placental angiogenesis and vitality of their offspring. J Anim Sci 2022; 100:6628671. [PMID: 35781577 DOI: 10.1093/jas/skac237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 07/01/2022] [Indexed: 11/12/2022] Open
Abstract
Our previous study found that dietary nucleotide supplementation, including adenosine 5 '-monophosphate (AMP), could increase AMP content in sow milk and promote piglet growth, but its effects on placental efficiency and piglet vitality remains unknown. This experiment aimed to investigate the effects of dietary AMP or its metabolite adenosine (ADO) supplementation on sow reproductive performance and placental angiogenesis. A total of 135 sows with a similar farrowing time were blocked by backfat and body weight (BW) at day 65 of gestation, and assigned to 1 of 3 dietary treatment groups (n = 45 per treatment): basal diet, basal diet supplemented with 0.1% AMP, or 0.1% ADO, respectively. Placental analysis and the characteristics of sows and piglets unveiled that compared with control (CON) group, AMP or ADO supplementation could improve sow placental efficiency (P<0.05) and newborn piglet vitality (P<0.05), increase piglet birth weight (P<0.05), and reduce stillbirth rate (P<0.05). More importantly, AMP or ADO supplementation could increase the contents of AMP, ADO, and their metabolites in placentae (P<0.05). Meanwhile, AMP or ADO supplementation could also increase placental vascular density (P<0.05) and the expression of vascular endothelial growth factor A (P<0.05), as well as promote the migration and tube formation of porcine iliac artery endothelial cells (P<0.05). Overall, maternal dietary AMP or ADO supplementation could increase their contents in the placenta, thereby improving placental angiogenesis and neonatal piglet vitality.
Collapse
Affiliation(s)
- D Y Wu
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, Institute of Subtropical Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - L Feng
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, Institute of Subtropical Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - X Y Hao
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, Institute of Subtropical Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - S B Huang
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, Institute of Subtropical Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Z F Wu
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, Institute of Subtropical Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - S Ma
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, Institute of Subtropical Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
| | - Y L Yin
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, Institute of Subtropical Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China.,National Engineering Laboratory for Pollution Control and Waste Utilization in Livestock and Poultry Production, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan 410125, China
| | - C Q Tan
- Guangdong Provincial Key Laboratory of Animal Nutrition Control, National Engineering Research Center for Breeding Swine Industry, Institute of Subtropical Animal Nutrition and Feed, College of Animal Science, South China Agricultural University, Guangzhou, Guangdong 510642, China
| |
Collapse
|
3
|
Li ZY, Hao EW, DU ZC, Cao R, Chen F, Mo LY, Wu DY, Hou XT, Deng JG. [Research progress of Curcuma kwangsiensis root tubers and analysis of liver protection and anti-tumor mechanisms based on Q-markers]. Zhongguo Zhong Yao Za Zhi 2022; 47:1739-1753. [PMID: 35534245 DOI: 10.19540/j.cnki.cjcmm.20211220.203] [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] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Curcuma kwangsiensis root tuber is a widely used genuine medicinal material in Guangxi, with the main active components of terpenoids and curcumins. It has the effects of promoting blood circulation to relieve pain, moving Qi to relieve depression, clearing heart and cooling blood, promoting gallbladder function and anti-icterus. Modern research has proved its functions in liver protection, anti-tumor, anti-oxidation, blood lipid reduction and immunosuppression. Considering the research progress of C. kwangsiensis root tubers and the core concept of quality marker(Q-marker), we predicted the Q-markers of C. kwangsiensis root tubers from plant phylogeny, chemical component specificity, traditional pharmacodynamic properties, new pharmacodynamic uses, chemical component measurability, processing methods, compatibility, and components migrating to blood. Curcumin, curcumol, curcumadiol, curcumenol, curdione, germacrone, and β-elemene may be the possible Q-markers. Based on the predicted Q-markers, the mechanisms of the liver-protecting and anti-tumor activities of C. kwangsiensis root tubers were analyzed. AKT1, IL6, EGFR, and STAT3 were identified as the key targets, and neuroactive ligand-receptor interaction signaling pathway, nitrogen metabolism pathway, cancer pathway, and hepatitis B pathway were the major involved pathways. This review provides a basis for the quality evaluation and product development of C. kwangsiensis root tubers and gives insights into the research on Chinese medicinal materials.
Collapse
Affiliation(s)
- Ze-Yu Li
- China-ASEAN Joint Laboratory for International Cooperation in Traditional Medicine Research, Guangxi University of Chinese Medicine Nanning 530200, China Guangxi Key Laboratory of Efficacy Study on Chinese Materia Medica Nanning 530200, China Guangxi Key Laboratory of Traditional Chinese Medicine Rheumatism Prescription Theory and Transformation Nanning 530200, China Guangxi Scientific Research Center of Traditional Chinese Medicine Nanning 530200, China
| | - Er-Wei Hao
- China-ASEAN Joint Laboratory for International Cooperation in Traditional Medicine Research, Guangxi University of Chinese Medicine Nanning 530200, China Guangxi Key Laboratory of Efficacy Study on Chinese Materia Medica Nanning 530200, China Guangxi Key Laboratory of Traditional Chinese Medicine Rheumatism Prescription Theory and Transformation Nanning 530200, China Guangxi Scientific Research Center of Traditional Chinese Medicine Nanning 530200, China
| | - Zheng-Cai DU
- China-ASEAN Joint Laboratory for International Cooperation in Traditional Medicine Research, Guangxi University of Chinese Medicine Nanning 530200, China Guangxi Key Laboratory of Efficacy Study on Chinese Materia Medica Nanning 530200, China Guangxi Key Laboratory of Traditional Chinese Medicine Rheumatism Prescription Theory and Transformation Nanning 530200, China Guangxi Scientific Research Center of Traditional Chinese Medicine Nanning 530200, China
| | - Rui Cao
- China-ASEAN Joint Laboratory for International Cooperation in Traditional Medicine Research, Guangxi University of Chinese Medicine Nanning 530200, China Guangxi Key Laboratory of Efficacy Study on Chinese Materia Medica Nanning 530200, China Guangxi Key Laboratory of Traditional Chinese Medicine Rheumatism Prescription Theory and Transformation Nanning 530200, China Guangxi Scientific Research Center of Traditional Chinese Medicine Nanning 530200, China
| | - Feng Chen
- China-ASEAN Joint Laboratory for International Cooperation in Traditional Medicine Research, Guangxi University of Chinese Medicine Nanning 530200, China Guangxi Key Laboratory of Efficacy Study on Chinese Materia Medica Nanning 530200, China Guangxi Key Laboratory of Traditional Chinese Medicine Rheumatism Prescription Theory and Transformation Nanning 530200, China Guangxi Scientific Research Center of Traditional Chinese Medicine Nanning 530200, China
| | - Liu-Ying Mo
- China-ASEAN Joint Laboratory for International Cooperation in Traditional Medicine Research, Guangxi University of Chinese Medicine Nanning 530200, China Guangxi Key Laboratory of Efficacy Study on Chinese Materia Medica Nanning 530200, China Guangxi Key Laboratory of Traditional Chinese Medicine Rheumatism Prescription Theory and Transformation Nanning 530200, China Guangxi Scientific Research Center of Traditional Chinese Medicine Nanning 530200, China
| | - Dong-Yang Wu
- China-ASEAN Joint Laboratory for International Cooperation in Traditional Medicine Research, Guangxi University of Chinese Medicine Nanning 530200, China Guangxi Key Laboratory of Efficacy Study on Chinese Materia Medica Nanning 530200, China Guangxi Key Laboratory of Traditional Chinese Medicine Rheumatism Prescription Theory and Transformation Nanning 530200, China Guangxi Scientific Research Center of Traditional Chinese Medicine Nanning 530200, China
| | - Xiao-Tao Hou
- China-ASEAN Joint Laboratory for International Cooperation in Traditional Medicine Research, Guangxi University of Chinese Medicine Nanning 530200, China Guangxi Key Laboratory of Efficacy Study on Chinese Materia Medica Nanning 530200, China Guangxi Key Laboratory of Traditional Chinese Medicine Rheumatism Prescription Theory and Transformation Nanning 530200, China Guangxi Scientific Research Center of Traditional Chinese Medicine Nanning 530200, China College of Pharmacy, Guangxi University of Chinese Medicine Nanning 530200, China
| | - Jia-Gang Deng
- China-ASEAN Joint Laboratory for International Cooperation in Traditional Medicine Research, Guangxi University of Chinese Medicine Nanning 530200, China Guangxi Key Laboratory of Efficacy Study on Chinese Materia Medica Nanning 530200, China Guangxi Key Laboratory of Traditional Chinese Medicine Rheumatism Prescription Theory and Transformation Nanning 530200, China Guangxi Scientific Research Center of Traditional Chinese Medicine Nanning 530200, China
| |
Collapse
|
4
|
Cheng F, Wu DY, Liang XH, Wang CJ, Weng JQ, Zou SP, Xu JM, Xue YP, Zheng YG. A light-controlled biocatalytic system for precise regulation of enzymatic decarboxylation. Catal Sci Technol 2022. [DOI: 10.1039/d2cy00480a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A light-controlled biocatalytic one-pot system is developed, which enables precise regulation of gene expression and photocatalysis by illumination and yields high conversion and stereoselectivity.
Collapse
Affiliation(s)
- Feng Cheng
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Dong-Yang Wu
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Xi-Hang Liang
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Cheng-Jiao Wang
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Jia-Qi Weng
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Shu-Ping Zou
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Jian-Miao Xu
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Ya-Ping Xue
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| | - Yu-Guo Zheng
- The National and Local Joint Engineering Research Center for Biomanufacturing of Chiral Chemicals, Zhejiang University of Technology, Hangzhou, 310014, P. R. China
| |
Collapse
|
5
|
Wu DY, Hou XT, Xia ZS, Hao EW, Xie JL, Liang JY, Liang QM, Du ZC, Deng JG. Analysis on oral medication rules of traditional Chinese medicine prescriptions for prevention of COVID-19. Chin Herb Med 2021; 13:502-517. [PMID: 34659385 PMCID: PMC8505017 DOI: 10.1016/j.chmed.2021.10.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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: 08/19/2021] [Revised: 09/15/2021] [Accepted: 09/25/2021] [Indexed: 11/30/2022] Open
Abstract
Objective To analyze the medication rules of traditional Chinese medicine (TCM) preventive oral prescriptions for COVID-19. Methods The preventive oral prescriptions for COVID-19 published by national and provincial health and wellness committees, administrations of TCM, medical institutions at all levels, medical masters and Chinese medicine experts were collected to establish a database, manual screening was carried out according to the inclusion and exclusion criteria, and frequency statistics, association rule analysis. The mutual information method, entropy hierarchical clustering and other methods were improved through Excel and the TCM inheritance auxiliary platform V2.5 to mine the rules and characteristics of medication. Results The selected 157 prescriptions contained a total of 130 TCMs. The top five TCMs with the highest use frequency were Glycyrrhizae Radix et Rhizoma (86), Astragali Radix (80), Lonicerea Japonicae Flos (70), Atractylodis Macrocephalae Rhizoma (62), Saposhnikoviae Radix (60). In accordance with TCM efficacy classification, most of them were medicines for qi-tonifying (279), followed by medicines for clearing heat and drying dampness (163), dispelling pathogenic wind-cold (126), resolving dampness (111), as well as dispelling pathogenic wind-heat (99). The characteristics of four-natures of the selected medicines are as follows: most of them were cold (59), followed by warm (38) and mild (21). In terms of five-taste, most of them were sweet (26) and acrid-and-bitter (24), followed by sweet-and-bitter (20), bitter (20) and acrid (15). For the meridian attribution, the five-zang organs and six-fu organs were all involved, most of them attributed to lung meridian (80), followed by stomach meridian (57) and spleen meridian (40). Based on association rule analysis, 12 commonly used medicine combinations with two or three TCMs were found. The commonly used medicinal pairs included Astragali Radix and Saposhnikoviae Radix (51), Astragali Radix and Atractylodis Macrocephalae Rhizoma (46), Atractylodis Macrocephalae Rhizoma and Saposhnikoviae Radix (43), Astragali Radix and Atractylodis Macrocephalae Rhizoma and Saposhnikoviae Radix (38), Forsythiae Fructus and Astragali Radix (37), and so on. In addition, 14 core combinations of medicines were obtained by complex system entropy cluster analysis, on this basis, six new prescriptions were screened out based on unsupervised entropy hierarchical clustering analysis. According to The Catalogue of Edible Traditional Chinese Medicinal Materials, Traditional Chinese Medicinal Materials for Health Food, and New Resources of Food published by National Health Commission of the People’s Republic of China, there are 35 species belonging to the group of edible traditional Chinese medicinal materials, 20 species belonging to the group of new resources of food, 31 species belonging to the group of traditional Chinese medicinal materials for health food, 19.11% of the preventive oral prescriptions for COVID-19 were composed of the medicines belonging to the above three groups. Besides, there are 11 toxic species, and 24.84% of the preventive oral prescriptions for COVID-19 contained toxic TCMs. Conclusion We found that invigorating qi and resolving dampness were the main treatment used to prevent for COVID-19, combined with the methods for strengthening vital energy and eliminating pathogenic factors. Most of the preventive oral prescriptions for COVID-19 were treated in lung, spleen and stomach meridians. In the process of selecting prescriptions and using TCMs to prevent for COVID-19, the safety of preventive medicines was also emphasized. And the theory of “Preventive Treatment of Disease” was embodied in these preventive oral prescriptions for COVID-19. For the prescriptions containing toxic TCMs, special attention should be paid to their safety in clinical application.
Collapse
Affiliation(s)
- Dong-Yang Wu
- Guangxi Key Laboratory of Efficacy Study on Chinese Materia Medica, Guangxi University of Chinese Medicine, Nanning 530001, China.,China-ASEAN Joint Laboratory for International Cooperation in Traditional Medicine Research, Guangxi University of Chinese Medicine, Nanning 530200, China
| | - Xiao-Tao Hou
- Guangxi Key Laboratory of Efficacy Study on Chinese Materia Medica, Guangxi University of Chinese Medicine, Nanning 530001, China.,Collaborative Innovation Center for Research on Functional Ingredients of Agricultural Residues, Guangxi University of Chinese Medicine, Nanning 530200, China.,China-ASEAN Joint Laboratory for International Cooperation in Traditional Medicine Research, Guangxi University of Chinese Medicine, Nanning 530200, China
| | - Zhong-Shang Xia
- Guangxi Key Laboratory of Efficacy Study on Chinese Materia Medica, Guangxi University of Chinese Medicine, Nanning 530001, China.,China-ASEAN Joint Laboratory for International Cooperation in Traditional Medicine Research, Guangxi University of Chinese Medicine, Nanning 530200, China
| | - Er-Wei Hao
- Guangxi Key Laboratory of Efficacy Study on Chinese Materia Medica, Guangxi University of Chinese Medicine, Nanning 530001, China.,Collaborative Innovation Center for Research on Functional Ingredients of Agricultural Residues, Guangxi University of Chinese Medicine, Nanning 530200, China.,Guangxi Key Laboratory of TCM Formulas Theory and Transformation for Damp Diseases, Guangxi University of Chinese Medicine, Nanning 530200, China.,China-ASEAN Joint Laboratory for International Cooperation in Traditional Medicine Research, Guangxi University of Chinese Medicine, Nanning 530200, China
| | - Jin-Ling Xie
- Guangxi Key Laboratory of Efficacy Study on Chinese Materia Medica, Guangxi University of Chinese Medicine, Nanning 530001, China.,Collaborative Innovation Center for Research on Functional Ingredients of Agricultural Residues, Guangxi University of Chinese Medicine, Nanning 530200, China.,China-ASEAN Joint Laboratory for International Cooperation in Traditional Medicine Research, Guangxi University of Chinese Medicine, Nanning 530200, China
| | - Jing-Yan Liang
- Guangxi Key Laboratory of Efficacy Study on Chinese Materia Medica, Guangxi University of Chinese Medicine, Nanning 530001, China
| | - Qiu-Ming Liang
- Qinzhou Hospital of Traditional Chinese Medicine, Qinzhou 535099, China
| | - Zheng-Cai Du
- Guangxi Key Laboratory of Efficacy Study on Chinese Materia Medica, Guangxi University of Chinese Medicine, Nanning 530001, China.,Collaborative Innovation Center for Research on Functional Ingredients of Agricultural Residues, Guangxi University of Chinese Medicine, Nanning 530200, China.,China-ASEAN Joint Laboratory for International Cooperation in Traditional Medicine Research, Guangxi University of Chinese Medicine, Nanning 530200, China
| | - Jia-Gang Deng
- Guangxi Key Laboratory of Efficacy Study on Chinese Materia Medica, Guangxi University of Chinese Medicine, Nanning 530001, China.,Collaborative Innovation Center for Research on Functional Ingredients of Agricultural Residues, Guangxi University of Chinese Medicine, Nanning 530200, China.,Guangxi Key Laboratory of TCM Formulas Theory and Transformation for Damp Diseases, Guangxi University of Chinese Medicine, Nanning 530200, China.,China-ASEAN Joint Laboratory for International Cooperation in Traditional Medicine Research, Guangxi University of Chinese Medicine, Nanning 530200, China
| |
Collapse
|
6
|
Lee CC, Wu DY, Lee TM. Exercise intensities modulate cognitive function in spontaneously hypertensive rats through oxidative mediated synaptic plasticity in hippocampus. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.2281] [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: 11/14/2022] Open
Abstract
Abstract
Background
Oxidative damage in the brain may lead to cognitive impairments. There was considerable debate regarding the beneficial effects of physical exercise on cognitive functions because exercise protocols have varied widely across studies.
Purpose
We investigated whether different exercise intensities alter performance on cognitive tasks.
Methods
The experiment was performed on spontaneously hypertensive rats (6 months at the established phase of hypertension) distributed into 3 groups: sedentary, low-intensity exercise, and high-intensity exercise.
Results
Systolic blood pressure measurements confirmed hypertension in spontaneously hypertensive rats. In comparison to normotensive Wistar-Kyoto rats, sedentary spontaneously hypertensive rats had similar escape latencies and a similar preference for the correct quadrant in the probe trial. Compared to the sedentary group, the low-intensity exercise group had significantly better improvements in spatial memory assessed by Morris water maze. Low-intensity exercise was associated with attenuated reactive oxygen species, as measured by dihydroethidine fluorescence and nitrotyrosine staining in the dentate gyrus of the hippocampus. This was coupled with increased numbers of neurons and dendritic spines as well as a significant upregulation of synaptic density. In contrast, the beneficial effects of low-intensity exercise are abolished in high-intensity exercise as shown by increased free radical levels and an impairment in spatial memory.
Conclusions
We concluded that exercise is an effective strategy to improve spatial memory in spontaneously hypertensive rats even at an established phase of hypertension. Low-intensity exercise exhibited better improvement on cognitive deficits than high-intensity exercise by attenuating free radical levels and improving downstream synaptic plasticity.
Funding Acknowledgement
Type of funding sources: None.
Collapse
Affiliation(s)
- C C Lee
- Kang-Ming Senior High School, Tainan, Taiwan
| | - D Y Wu
- Catholic Sheng Kung Girls' High School, Tainan, Taiwan
| | - T M Lee
- Cardiovascular Institute, An Nan Hospital, China Medical University, Tainan, Taiwan
| |
Collapse
|
7
|
Wang L, Jin YP, Gao G, Wu DY, Zhou XJ, Liu YY, Xia QX. [Clinicopathological features and molecular genetics of Burkitt-like lymphoma with 11q aberration]. Zhonghua Bing Li Xue Za Zhi 2021; 50:655-657. [PMID: 34078056 DOI: 10.3760/cma.j.cn112151-20201228-00980] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- L Wang
- Department of Pathology, the Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou 450008, China
| | - Y P Jin
- Department of Pathology, the Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou 450008, China
| | - G Gao
- Department of Pathology, the Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou 450008, China
| | - D Y Wu
- Department of Pathology, the Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou 450008, China
| | - X J Zhou
- Department of Pathology, the Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou 450008, China
| | - Y Y Liu
- Department of Pathology, the Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou 450008, China
| | - Q X Xia
- Department of Pathology, the Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou 450008, China
| |
Collapse
|
8
|
Hu WM, Shi ZH, Wu DY, Ye SY, Xiang YJ, Liu C, Chen JC, Zeng CL. Effects of combined therapy of valsartan and rosuvastatin on patients with atrial fibrillation. J BIOL REG HOMEOS AG 2021; 34:2215-2220. [PMID: 33185084 DOI: 10.23812/20-335-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- W M Hu
- Department of Cardiology, Lishui Municipal Central Hospital, Lishui, Zhejiang, China
| | - Z H Shi
- Department of Cardiology, Lishui Municipal Central Hospital, Lishui, Zhejiang, China
| | - D Y Wu
- Department of Cardiology, Lishui Municipal Central Hospital, Lishui, Zhejiang, China
| | - S Y Ye
- Department of Cardiology, Lishui Municipal Central Hospital, Lishui, Zhejiang, China
| | - Y J Xiang
- Department of Cardiology, Lishui Municipal Central Hospital, Lishui, Zhejiang, China
| | - C Liu
- Department of Cardiology, Lishui Municipal Central Hospital, Lishui, Zhejiang, China
| | - J C Chen
- Department of Cardiology, Lishui Municipal Central Hospital, Lishui, Zhejiang, China
| | - C L Zeng
- Department of Cardiology, Lishui Municipal Central Hospital, Lishui, Zhejiang, China
| |
Collapse
|
9
|
Wu DY, Tang DJ, Zhang Y, He BL, Wang Y, Tan RJ. [Subcutaneous sparganosis: a case report]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2021; 33:439-441. [PMID: 34505457 DOI: 10.16250/j.32.1374.2020175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
This case report presents the diagnosis and treatment of a case with subcutaneous sparganosis.
Collapse
Affiliation(s)
- D Y Wu
- Department of Dermatology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - D J Tang
- Department of Pathology, Shizhu Tujia Autonomous County People's Hospital, China
| | - Y Zhang
- Department of Dermatology, Chongqing First People's Hospital, China
| | - B L He
- Department of Dermatology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - Y Wang
- Department of Dermatology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - R J Tan
- Department of Dermatology, The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| |
Collapse
|
10
|
Wu DY, Zhuang MZ, Wu YC, Jin L, Wu YC, Gao PF, Liu JF, Jin YZ, Pan YL, Fu HY. [Analysis of Industrial VOCs Emission Inventory and Countermeasures in Xiamen]. Huan Jing Ke Xue 2020; 41:5336-5344. [PMID: 33374049 DOI: 10.13227/j.hjkx.202003245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Based on data from industrial activities and environmental surveys in the six districts of Xiamen, the emission inventory of industrially sourced volatile organic compounds (VOCs) from eight industries in the six districts of Xiamen was calculated for 2019 by applying the emission factor analysis method. The spatial distribution pattern of VOC emission intensity in the six districts of Xiamen was analyzed. VOCs treatment technologies applied in the industries in the VOCs emission inventory were analyzed and countermeasures for improving VOC control were proposed based on the survey of the industries. The results showed that the total VOCs production and VOCs emission from industrial sources in Xiamen was 16027.88 t and 5514.58 t in 2019, respectively. Among them, the VOCs emission from Haicang, Tong'an, Xiang'an, and Jimei districts outside Xiamen Island were 1648.35, 2111.13, 667.52, and 750.48 t, respectively. Fewer VOC emissions from Xiamen Island were observed, which included 292.42 and 44.68 t from Huli and Siming districts, respectively. Except for the Huli District, the spatial distribution of emissions showed a spatial characteristic that the VOCs emission intensities outside Xiamen Island are higher than that of Xiamen Island. Among the eight industries in Xiamen, VOCs emissions were mainly from coating, printing, chemical, and rubber industries, which accounted for 51.21%, 20.18%, 13.63%, and 10.67%, respectively, of the total emissions. The analytic results of the VOCs waste gas disposal technique in Xiamen indicate that, from the perspective of source control, enterprises can effectively control the generation and emission of the VOCs at the source by using low (zero) raw materials. For the terminal disposal procedure, the actual disposal efficiency of UV photolysis/photocatalysis, low-temperature plasma, and biological methods are all lower than 80%, and that of the combined technique of adsorption and catalytic combustion, and the combustion method are both higher than 90%.
Collapse
Affiliation(s)
- Dong-Yang Wu
- Key Laboratory of Environmental Biotechnology of Fujian University, Xiamen University of Technology, Xiamen 361024, China
| | - Ma-Zhan Zhuang
- Xiamen Academy of Environmental Sciences, Xiamen 361021, China
| | - Yan-Cong Wu
- Xiamen Academy of Environmental Sciences, Xiamen 361021, China
| | - Lei Jin
- Key Laboratory of Environmental Biotechnology of Fujian University, Xiamen University of Technology, Xiamen 361024, China
| | - Yi-Cheng Wu
- Key Laboratory of Environmental Biotechnology of Fujian University, Xiamen University of Technology, Xiamen 361024, China
| | - Pan-Feng Gao
- Key Laboratory of Environmental Biotechnology of Fujian University, Xiamen University of Technology, Xiamen 361024, China
| | - Jian-Fu Liu
- Key Laboratory of Environmental Biotechnology of Fujian University, Xiamen University of Technology, Xiamen 361024, China
| | - Yue-Zheng Jin
- Key Laboratory of Environmental Biotechnology of Fujian University, Xiamen University of Technology, Xiamen 361024, China
| | - Ya-Lei Pan
- Key Laboratory of Environmental Biotechnology of Fujian University, Xiamen University of Technology, Xiamen 361024, China
| | - Hai-Yan Fu
- Key Laboratory of Environmental Biotechnology of Fujian University, Xiamen University of Technology, Xiamen 361024, China
| |
Collapse
|
11
|
Yan JY, Chen YJ, He LJ, Peng CH, Pang WB, Wang ZM, Wu DY, Wang K. [Experience of diagnosis and treatment in 4 children with colorectal cancer and literature review]. Zhonghua Wei Chang Wai Ke Za Zhi 2019; 22:1209-1213. [PMID: 31874540 DOI: 10.3760/cma.j.issn.1671-0274.2019.12.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
|
12
|
Wu DY, Qiao D, Zhang X, Zhang HQ, Luo ZC, Wang Y, Pan J, Wang C. Lipid profiles as potential mediators linking body mass index to osteoporosis among Chinese adults: the Henan Rural Cohort Study. Osteoporos Int 2019; 30:1413-1422. [PMID: 30834945 DOI: 10.1007/s00198-019-04878-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 09/21/2018] [Accepted: 01/24/2019] [Indexed: 12/17/2022]
Abstract
UNLABELLED This study is to examine the relationship between body mass index (BMI) and osteoporosis in rural areas of China, and then explore whether this association was mediated by lipid profiles. Results showed that with the increasing of BMI, the risk of osteoporosis was reduced, and lipid profiles mediate this association. INTRODUCTION To examine the relationship between BMI and osteoporosis, and explore whether this association was mediated by lipid profiles. METHODS A total of 8272 participants (18-79 years) were enrolled from the Henan Rural Cohort Study. The bone mineral density of the calcaneus was measured using an ultrasonic bone density apparatus. Logistic regression and restricted cubic splines were used to evaluate the odds ratio (OR) and 95% confidence intervals (95% CI). Mediation analysis using bootstrap was performed to examine the contribution of lipid profiles to BMI-related osteoporosis. RESULTS The crude and age-standardized prevalence of osteoporosis were 15.93% and 11.77%, respectively. The mean BMIs were 24.12 kg/m2 for participants with osteoporosis and 25.06 kg/m2 for non-osteoporosis participants (P < 0.001). After adjusting for potential confounders, subjects with obesity had a lower OR of osteoporosis (0.493 [95% CI: 0.405-0.600], Ptrend < 0.001) compared with normal-weight individuals. Mediation analysis showed that lipid profile partly mediated the relationship between BMI and osteoporosis with indirect effect OR (95% CI) of 0.985 (0.978-0.992), and the proportion explained of BMI was 15.48% for lipid profile. CONCLUSION With the increasing of BMI, the risk of osteoporosis was reduced in the Chinese adult population, and lipid profiles may be a potential mediator linking reduced risk of osteoporosis. Elucidating the underlying mechanisms will facilitate developing feasible preventive and therapeutic measures for osteoporosis. Chinese clinical trial register: ChiCTR-OOC-15006699.
Collapse
Affiliation(s)
- D Y Wu
- Department of Orthopaedic Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, People's Republic of China
- The Second Clinical Medical School, Wenzhou Medical University, Wenzhou, Zhejiang, People's Republic of China
| | - D Qiao
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450001, Henan, People's Republic of China
| | - X Zhang
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450001, Henan, People's Republic of China
| | - H Q Zhang
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450001, Henan, People's Republic of China
| | - Z C Luo
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450001, Henan, People's Republic of China
| | - Y Wang
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450001, Henan, People's Republic of China
| | - J Pan
- Department of Orthopaedic Surgery, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, Zhejiang, People's Republic of China.
- The Second Clinical Medical School, Wenzhou Medical University, Wenzhou, Zhejiang, People's Republic of China.
| | - C Wang
- Department of Epidemiology and Biostatistics, College of Public Health, Zhengzhou University, 100 Kexue Avenue, Zhengzhou, 450001, Henan, People's Republic of China.
| |
Collapse
|
13
|
Abstract
BACKGROUND Cholangitis is the most common complication after the Kasai procedure. It can be life-threatening and may affect long- and short-term outcomes of children with biliary atresia. We summarize our experiences in the prevention of early-onset cholangitis. PATIENTS AND METHODS From January 2002 to March 2013, children with biliary atresia (BA) who underwent the Kasai procedure in the General Surgical Department were included in a retrospective cohort study. These patients were divided into group A (therapy 1) and group B (therapy 2) depending on the infection prevention protocol and occurrences of cholangitis within the six months after surgery were recorded. Two hundred eighteen children were included in this cohort study. Seventy-six children (35 females and 41 males) were included in group A. One hundred forty-two children (65 females and 77 males) were included in group B. Therapy 1 was our primary protocol and included a third-generation cephalosporin, metronidazole, and human immunoglobulin. Therapy 2 was a modification of therapy 1 that involved imipenem-cilastatin and human immunoglobulin. Statistical analyses were performed. A p value below 0.05 was regarded as significant. RESULTS In group A, 45 children developed cholangitis within the six months after the Kasai procedure. In group B, 14 of these children experienced post-operative cholangitis. A χ2 analysis was used to examine the difference in the incidence of cholangitis between groups A and B. There was a substantial difference in the morbidity of post-operative cholangitis between groups A and B (59.2% vs. 9.9%, p = 0.000). CONCLUSION Cholangitis in the early period after a Kasai procedure can be prevented effectively with an advanced prophylactic protocol.
Collapse
Affiliation(s)
- Wen-Bo Pang
- Department of General Pediatric Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Ting-Chong Zhang
- Department of General Pediatric Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Ya-Jun Chen
- Department of General Pediatric Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Chun-Hui Peng
- Department of General Pediatric Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Zeng-Meng Wang
- Department of General Pediatric Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Dong-Yang Wu
- Department of General Pediatric Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| | - Kai Wang
- Department of General Pediatric Surgery, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, China
| |
Collapse
|
14
|
Abstract
This study was undertaken to explore the causes, diagnosis, and treatment of anastomotic leakage after pull-through (PT) procedure for Hirschsprung disease (HD).A retrospective analysis of patients with anastomotic leakage after a PT procedure in the General Surgery Department of Beijing Children's Hospital from July 2013 to June 2016 was undertaken. The surgical characteristics, diagnosis, and treatment were retrospectively analyzed.Among the 213 patients who underwent PT procedures, 5 patients had a documented anastomotic leakage. The median age of these 5 patients at the time of the PT procedure was 6.8 years old, and this was higher than those without anastomotic leakage (1.7 years old). In all patients, rectal examination in the lithotomy position revealed an anastomotic dehiscence at the 6 o'clock position. The abdominal ultrasonography demonstrated retrorectal pneumatosis with or without an abscess in 4 patients. All patients were treated with ileostomies and anastomotic resuturing. The median delay to management was 4 days (range: 1-29 days). Four patients (4/5, 80%) were cured, and 1 (delay, 29 days) of these 4 patients developed postoperative ileus. The remaining patient (delay, 9 days) was required to undergo a repeat PT procedure. For the 4 cured patients, the median follow-up time was 20 months (range: 15-37 months), and these patients defecated 3 times daily at most without soiling.Older children with HD might be prone to anastomotic leakage. The findings of the rectal examination and ultrasonography were distinctive and useful for the diagnosis. Early ileostomy and resuturing of the anastomosis could be used to treat anastomotic leakage.
Collapse
|
15
|
Gao F, Zang L, Wu DY, Li YJ, Zhang Q, Wang HB, Tian GL, Mu YM. Pioglitazone improves the ability of learning and memory via activating ERK1/2 signaling pathway in the hippocampus of T2DM rats. Neurosci Lett 2017; 651:165-170. [PMID: 28458023 DOI: 10.1016/j.neulet.2017.04.052] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 04/25/2017] [Accepted: 04/26/2017] [Indexed: 01/05/2023]
Abstract
OBJECTIVE To explore the correlation between effect of PIO (pioglitazone, PIO) on learning as well as memory and ERK1/2 (extracellular signal regulated kinase 1/2, ERK1/2) pathway in T2DM (type 2 diabetes mellitus, T2DM) rats, further to elucidate the potential mechanism of PIO in improvement of learning and memory. METHODS 12-week-old male SD rats (number of 10 per group) were randomly divided into control group (CON), T2DM group (DM) and T2DM +PIO group (DM+PG). Rats in DM and DM+PG groups were given high fat diet for 20 weeks, then treated with Streptozotocin (27mg/kg) by intraperitoneal injection at 21week. After 72h, the FBG (fasting blood glucose, FBG) was greater than 7.0mmol/L can considered T2DM rats. DM+PG group was treated with PIO (10 mg·kg-1·d-1) by gavage daily. After Hyperinsulinemic-Euglycemic Clamp Study and Morris water maze test at 30-week, all of animals were sacrificed. The expressions of RKIP (Raf-1 kinase inhibitor protein, RKIP) and ERK1/2 in hippocampus were detected using Western Blot and real-time PCR. RESULTS The FBG level: DM group (7.68±0.54mmol/L) was higher than CON group (5.35±0.63mmol/L) and DM+PG group (6.07±0.84mmol/L), the differences were considered statistically significant (P <0.05). Hyperinsulinemic-Euglycemic Clamp Studies: GIR (glucose infusion rate, GIR) of DM group (21.02±5.10 mg·kg-1·d-1) was less than CON group (27.64±3.87 mg·kg-1·d-1) and DM+PG group (26.04 ±5.41 mg·kg-1·d-1), the differences were considered statistically significant (P <0.05). Morris water maze training: The escape latencies and searching platform performance of DM group (24.54±5.02s) decreased significantly compared with CON group (16.73±4.02s) and DM+PG group (18.05±4.12s) (P <0.05). Changes of RKIP, ERK, p-ERK protein relative content in rat hippocampus: Compared with CON groupand DM+PG group, the relative content of RKIP in DM group remarkably increased (P<0.01); ERK protein levels were not considered statistically significant among the three groups (P>0.05); The relative content of p-ERK1/2 protein in CON group and DM+PG group rats dorsal were higher than those in group DM, the difference was considered statistically significant (P<0.01). Changes in hippocampus of rat RKIP and ERK gene relative content: Compared with CON group and DM+PG group, levels of RKIP mRNA in DM group were significantly increased (P<0.01); ERK mRNA levels were not considered statistically significant among the three groups (P>0.05). CONCLUSION Activation of ERK1/2 signal transduction pathway via reducing RKIP in the hippocampus may be one of the mechanisms of PIO to improve the learning and memory of the T2DM rats.
Collapse
Affiliation(s)
- F Gao
- Department of Endocrinology, Chinese PLA General Hospital, Beijing 100853, China; Department of End-ocrinology, First Hospital of Shijiazhuang City, Shijiazhuang 050011, China
| | - L Zang
- Department of Endocrinology, Chinese PLA General Hospital, Beijing 100853, China
| | - D Y Wu
- Department of End-ocrinology, First Hospital of Shijiazhuang City, Shijiazhuang 050011, China
| | - Y J Li
- Department of Endocrinology, Chinese PLA General Hospital, Beijing 100853, China
| | - Q Zhang
- Department of Endocrinology, Chinese PLA General Hospital, Beijing 100853, China
| | - H B Wang
- Department of Endocrinology, Chinese PLA General Hospital, Beijing 100853, China
| | - G L Tian
- Department of Endocrinology, Chinese PLA General Hospital, Beijing 100853, China
| | - Y M Mu
- Department of Endocrinology, Chinese PLA General Hospital, Beijing 100853, China.
| |
Collapse
|
16
|
Hsu KC, Wu DY, Lin PY, Fu YS, Liao JD. Polyvinylbutyral-assisted synthesis and characterization of SnS mesoporous fibers via electrospinning process. J Appl Polym Sci 2015. [DOI: 10.1002/app.42388] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Kuo-Chin Hsu
- Department of Materials Science and Engineering; National Cheng Kung University; Tainan 701 Taiwan
| | - Dong-Yang Wu
- Department of Greenergy; National University of Tainan; Tainan 701 Taiwan
| | - Pei-Ying Lin
- Department of Photonics; National Cheng Kung University; Tainan 701 Taiwan
| | - Yaw-Shyan Fu
- Department of Greenergy; National University of Tainan; Tainan 701 Taiwan
| | - Jiuun-Der Liao
- Department of Materials Science and Engineering; National Cheng Kung University; Tainan 701 Taiwan
| |
Collapse
|
17
|
Tang QH, Yu FY, Zhang SQ, Niu XQ, Zhu H, Song WW, Han CW, Wu DY, Qin WQ. First Report of Burkholderia andropogonis Causing Bacterial Leaf Spot of Betel Palm in Hainan Province, China. Plant Dis 2013; 97:1654. [PMID: 30716817 DOI: 10.1094/pdis-07-12-0653-pdn] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
In May 2009, a severe bacterial disease of arecanut (Areca catechu L.) with an incidence of 100% was observed in a plantation of about 8,400 plants in Wenchang City, Hainan Province, China (19°47.171' N, 110°54.335' E). Symptoms consisted of small circular to elongated brown lesions, ranging from 1 to 105 mm in length and 1 to 21 mm in width, surrounded by yellow halos. White colonies, without fluorescent or diffusible pigments, were consistently recovered on King's B Medium plates from lesions surface-sterilized in 70% ethyl alcohol for 1 min. All isolates were gram-negative and each had a single, polar, sheathed flagellum. Isolates were identified as a Burkholderia sp. based on physiological and biochemical tests: oxidase and catalase positive, negative for arginine dihydrolase, gelatin hydrolysis and starch hydrolysis, and negative for acid production from levan (1,3). Sequences (approx. 1,400 bp each) of the 16S rRNA gene amplified from four isolates using primer pair 27F/1492R (2) (GenBank Accession Nos. JX415481, JX415479, JX415482, and JX415483) shared 99% sequence identity with that of Burkholderia andropogonis strain 6369 (DQ786951). Representative isolates Y11 (China General Microbiological Culture Collection Center No. CGMCC 1.12337), Y30 (CGMCC 1.12338), W15, and W20 were compared with B. andropogonis strain NCPPB No. 1012 and all caused a hypersensitive reaction on leaves of Nicotiana benthamiana. Isolate pathogenicity was tested twice with a total of three replications per isolate. Two young leaves each of 2-year-old arecanut plants were infiltrated with a bacterial suspension of 108 CFU/ml, then covered individually with plastic bags for 48 h, and incubated at 100% relative humidity with 16 h of daylight at 25°C by day and 8 h of darkness at 20°C by night. After 7 days, small water-soaked spots with yellow halos were observed and 60 days after inoculation, lesions developed similar to those caused by B. andropogonis in the field. Koch's postulates were fulfilled by reisolating bacteria from typical lesions on inoculated plants. These bacteria were identical to inoculated strains in colony morphology and sequences of the 16S ribosomal RNA gene. To our knowledge, this is the first report of B. andropogonis infection on betel in Hainan Province, mainland China. This disease was first reported in Taiwan, a province of China. Conditions of high humidity and high temperature support disease outbreaks and infection can result in severe economic losses. In 2012, this disease also appeared on a number of plantations located in other counties. As betel is, economically, the second most important crop in Hainan Province, measures should be required to control this disease, especially in typhoon seasons. References: (1) S. H. Hseu et al. Plant Pathol. Bull. 16:131, 2007. (2) D. J. Lane. In: E. Stackebrandt, et al. Nucleic acid techniques in bacterial systematics. John Wiley & Sons, Chichester, United Kingdom, pp. 115-175, 1991. (3) X. Li and S. H. De Boer. Plant Dis. 89:1132. 2005.
Collapse
Affiliation(s)
- Q H Tang
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang, Hainan 571339 P. R. China
| | - F Y Yu
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang, Hainan 571339 P. R. China
| | - S Q Zhang
- Institute of Tropical Bioscience and Biotechnology, CATAS, Haikou, Hainan 571101 P. R. China
| | - X Q Niu
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang, Hainan 571339 P. R. China. The project was funded by National Nonprofit Institute Research Grant of CATAS-ITBB (No. 1630052012016) and Natural Science Foundation of Hainan Province (No. 312041)
| | - H Zhu
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang, Hainan 571339 P. R. China. The project was funded by National Nonprofit Institute Research Grant of CATAS-ITBB (No. 1630052012016) and Natural Science Foundation of Hainan Province (No. 312041)
| | - W W Song
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang, Hainan 571339 P. R. China. The project was funded by National Nonprofit Institute Research Grant of CATAS-ITBB (No. 1630052012016) and Natural Science Foundation of Hainan Province (No. 312041)
| | - C W Han
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang, Hainan 571339 P. R. China. The project was funded by National Nonprofit Institute Research Grant of CATAS-ITBB (No. 1630052012016) and Natural Science Foundation of Hainan Province (No. 312041)
| | - D Y Wu
- Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang, Hainan 571339 P. R. China. The project was funded by National Nonprofit Institute Research Grant of CATAS-ITBB (No. 1630052012016) and Natural Science Foundation of Hainan Province (No. 312041)
| | - W Q Qin
- Institute of Tropical Bioscience and Biotechnology, CATAS, Haikou, Hainan 571101 P. R. China
| |
Collapse
|
18
|
Wu PC, Wang Q, Grobman L, Chu E, Wu DY. Accelerated cellular senescence in solid tumor therapy. Exp Oncol 2012; 34:298-305. [PMID: 23070015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Accelerated cellular senescence (ACS) is an emerging concept that implicates sustained, telomere-independent cell cycle arrest of neoplastic cells in response to chemotherapeutic agents, ionizing radiation, oxidative stress, or the presence of selective oncogenic stimuli. Recent evidence suggests that a subset of tumor cells induced in a state of reversible ACS can escape cell cycle arrest and resume proliferation accounting for cancer progression. The purpose of this review is to describe our current understanding of ACS including signaling pathways of senescence escape, role of senescence biomarkers, and rationale for senescence-based therapy. This article is part of a Special Issue entitled "Apoptosis: Four Decades Later".
Collapse
Affiliation(s)
- P C Wu
- Department of Surgery, VA Puget Sound Health Care System, Seattle, WA 98108, USA.
| | | | | | | | | |
Collapse
|
19
|
Sangwan P, Way C, Wu DY. New insight into biodegradation of polylactide (PLA)/clay nanocomposites using molecular ecological techniques. Macromol Biosci 2009; 9:677-86. [PMID: 19148900 DOI: 10.1002/mabi.200800276] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Novel molecular ecological techniques were used to study changes in microbial community structure and population during degradation of polylactide (PLA)/organically modified layered silicates (OMLS) nanocomposites. Cloned gene sequences belonging to members of the phyla Actinobacteria and Ascomycota comprized the most dominant groups of microorganisms during biodegradation of PLA/OMLS nanocomposites. Due to their numerical abundance, members of these microbial groups are likely to play an important role during biodegradation process. This paper presents new insights into the biodegradability of PLA/OMLS nanocomposites and highlights the importance of using novel molecular ecological techniques for in situ identification of new microorganisms involved in biodegradation of polymeric materials.
Collapse
Affiliation(s)
- Parveen Sangwan
- CSIRO Materials Science and Engineering, Gate 5, Normanby Rd, Clayton South, Victoria 3168, Australia
| | | | | |
Collapse
|
20
|
Abstract
BACKGROUND NKT cells recognize glycolipids presented by CD1d on antigen-presenting cells (APC) and have been largely characterized by their ability to be activated by alpha-galactosylceramide, a glycolipid not expressed on mammalian cells. We have shown previously that GD3 can be cross-presented by CD1d to NKT cells and is the first tumor-derived glycolipid recognized by NKT cells. But the ability of NKT cells to modulate B-cell responses to tumor glycolipids that are themselves recognized by NKT cells has not been explored. METHODS We tested whether NKT cells are required for antibody (Ab) responses to GD3. We immunized wild-type mice, mice deficient in invariant chain NKT cells (iNKT cells) and mice deficient in total NKT cells against GD3. Ab titer against GD3 was measured by ELISA. RESULTS We found the IgM and IgG responses against GD3 were similar among the three strains of mice, including the IgG isotypes induced. Pre-expanded NKT cells to GD3 did not affect the anti-GD3 Ab response. DISCUSSION We conclude that Ab responses to GD3 are independent of NKT cells and that strategies to manipulate NKT cells in vivo are not likely to enhance the anti-GD3 Ab response induced by vaccines.
Collapse
Affiliation(s)
- J-E Park
- Department of Medicine and Swim Across America Laboratory, Memorial Sloan-Kettering Cancer Center, New York, New York 10021, USA
| | | | | | | | | |
Collapse
|
21
|
Chalco K, Wu DY, Mestanza L, Muñoz M, Llaro K, Guerra D, Palacios E, Furin J, Shin S, Sapag R. Nurses as providers of emotional support to patients with MDR-TB. Int Nurs Rev 2006; 53:253-60. [PMID: 17083413 DOI: 10.1111/j.1466-7657.2006.00490.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIM To identify the forms and means of emotional support that nurses provide to patients living with multidrug-resistant tuberculosis (MTR-TB) in Lima, Peru. BACKGROUND A fundamental role of nurses is to provide emotional support, defined as all the strategies that a health team employs to assure the psychosocial well-being of the patient. However, neither the forms of emotional support nor the means used by nurses in resource-poor settings have been much written about. This paper describes a qualitative study of a team of seven nurses working in a programme that provides individualized MDR-TB treatment to patients in Lima, Peru. It describes the various forms of support that facilitated the ability of patients to adhere to treatment despite socio-economic difficulties, social stigma, drug side effects, problems related to different stages of treatment and concurrent illnesses/special situations. METHODS Qualitative study methods were employed over the course of 8 years to observe nurses and patients in an MDR-TB treatment programme. These included participant observation, structured observation sessions of nurses with their patients and focus groups with seven nurses. CONCLUSION Through theme and content analyses of qualitative data, ten situations related to MDR-TB treatment were found. These ten issues served as an analytical framework used to identify and discuss the various types of emotional support provided by both formal and informal means. This type of support focused on problems related to different stages of treatment, social stigma of the illness, treatment adherence, side effects, socio-economic difficulties, death and concurrent illnesses/special situations. PRACTICE IMPLICATIONS The essential role of the nurse as a provider of emotional support in the development or implementation of similar programmes with MDR-TB should, in future, be taken into account.
Collapse
|
22
|
Lee MT, Wu DY, Tian ZQ, Lin SH. Effect of displacement and distortion of potential energy surfaces and overlapping resonances of electronic transitions on surface-enhanced Raman scattering: Models and ab initio theoretical calculation. J Chem Phys 2005; 122:094719. [PMID: 15836174 DOI: 10.1063/1.1859283] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
A previously developed theory for the temperature-dependent resonance Raman scattering is used to study the surface-enhanced Raman scattering. Two models, the displaced oscillator model and the displaced-distorted oscillator model, based on the harmonic potential energy surfaces are carried out to calculate the surface-enhanced Raman scattering excitation profiles of the pyridine molecule adsorbed on a silver electrode, for which the density functional theory method is applied to evaluate the potential energy surfaces of the adsorption structure. In this framework, the distortion effect on the surface-enhanced Raman scattering will be discussed by comparing both models. The overlapping resonance of multiexcited electronic transitions is also studied, in which the interference between electronic transitions has been taken into account. It will be used to study the abnormal band at 1005.6 cm(-1) with the exciting radiation 457.9 nm.
Collapse
Affiliation(s)
- M T Lee
- Institute of Atomic and Molecular Sciences, Academia Sinica, P.O. Box 23-166, 106 Taipei, Taiwan, Republic of China
| | | | | | | |
Collapse
|
23
|
Wu DY, Hayashi M, Lin SH, Tian ZQ. Theoretical differential Raman scattering cross-sections of totally-symmetric vibrational modes of free pyridine and pyridine-metal cluster complexes. Spectrochim Acta A Mol Biomol Spectrosc 2004; 60:137-146. [PMID: 14670470 DOI: 10.1016/s1386-1425(03)00190-2] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The differential Raman scattering cross-sections of totally-symmetric vibrational modes for pyridine and pyridine-metal clusters have been calculated by using ab initio and density functional methods. The results are compared with experimental data and a good agreement is obtained. In particular, we can theoretically reproduce the significant changes in the relative Raman intensities of the nu(12) mode in pyridine-metal cluster complexes. We focus on two mechanisms for these Raman intensities changes: (1) the chemical interaction between the pyridine and the metal clusters; and (2) the charge transfer mechanism. For the pyridine-silver cluster complexes, we find that due to the weak bonding, the chemical interaction does not influence the relative intensities of the Raman peaks of the nu(1) and nu(12) modes. However, in the case where the copper or the gold clusters are attached to pyridine, the intensity of the band of the nu(12) mode is weakened significantly. We also find that the charge transfer mechanism increases the asymmetry of the bands of the nu(1) and nu(12) modes on all three metals.
Collapse
Affiliation(s)
- D Y Wu
- Institute of Atomic and Molecular Sciences, Academia Sinica, P.O. Box 23-166, Taipei 106, Taiwan, ROC.
| | | | | | | |
Collapse
|
24
|
Hangai M, Moon YS, Kitaya N, Chan CK, Wu DY, Peters KG, Ryan SJ, Hinton DR. Systemically expressed soluble Tie2 inhibits intraocular neovascularization. Hum Gene Ther 2001; 12:1311-21. [PMID: 11440624 DOI: 10.1089/104303401750270968] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Retinal and choroidal neovascularization are the most frequent causes of severe and progressive vision loss. Studies have demonstrated that Tie2, an endothelial-specific receptor tyrosine kinase, plays a key role in angiogenesis. In this study, we determined whether adenovirus-mediated gene delivery of extracellular domain of the Tie2 receptor (ExTek) could inhibit experimental retinal and choroidal neovascularization. Immunofluorescence histochemistry with a monoclonal antibody to human Tie2 showed that Tie2 expression is prominent around and within the base of newly formed blood vessels of retinal and choroidal neovascular lesions. A single intramuscular injection of adenovirus expressing ExTek genes achieved plasma levels of ExTek exceeding 500 microg/ml in mice for 10 days (in neonates) and 7 days (in adults). This treatment inhibited retinal neovascularization by 47% (p < 0.05) in a murine model of ischemia-induced retinopathy. The same treatment reduced the incidence and extent of sodium fluorescein leakage from choroidal neovascular lesions by 52% (p < 0.05) and 36% (p < 0.01), respectively, in a laser-induced murine choroidal neovascularization model. The same mice showed a 45% (p < 0.001) reduction of integrated area of the choroidal neovascularization. These findings indicate that Tie2 signaling is a common component of the angiogenic pathway in both retinal and choroidal neovascularization, providing a potentially useful target in the treatment of intraocular neovascular diseases.
Collapse
Affiliation(s)
- M Hangai
- Department of Ophthalmology, Keck School of Medicine at the University of Southern California, 2011 Zonal Avenue, Los Angeles, CA 90033, USA
| | | | | | | | | | | | | | | |
Collapse
|
25
|
Wu DY, Goldschneider I. Tolerance to cyclosporin A-induced autologous graft-versus-host disease is mediated by a CD4+CD25+ subset of recent thymic emigrants. J Immunol 2001; 166:7158-64. [PMID: 11390462 DOI: 10.4049/jimmunol.166.12.7158] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Our previous studies revealed that both the autoeffector and immunoregulatory T cells in cyclosporin A (CSA)-induced autologous graft-vs-host disease are recent thymic emigrants (RTEs). The autoeffector cells appear in and are released from the thymus during the first week of CSA treatment, whereas the immunoregulatory thymocytes appear during the second week but are not released until several days after cessation of CSA treatment. In the present study, the antigenic phenotypes of these functional T cell subsets were determined by immunomagnetic separation and flow immunocytometric analysis. During CSA wk 1, the autoeffector T cells in both the thymus and lymph node (LN) expressed a CD4+8+ double-positive (DP) phenotype, after which those in the LN became CD8 single positive (SP). Timed thymectomy experiments confirmed that the CD8-SP autoeffector T cells in LN originated from these DP RTEs. During CSA wk 2, the immunoregulatory thymocytes also displayed a DP phenotype. However, they were not exported to the periphery until several days after CSA treatment had been interrupted and they had acquired a CD4-SP phenotype. In LN, these immunoregulatory RTEs expressed the CD25+ marker characteristic of anergic/suppressor T cells. Cell separation and mixing experiments demonstrated that the autoeffector T cells persist in LN after cessation of CSA treatment, but their activity is not detectable in the presence of recently exported CD4+ T cells. Hence, the results indicate that tolerance to CSA-induced autologous graft-vs-host disease is actively mediated by CD25+CD4+ RTEs that suppress the function of CD8 autoeffector T cells.
Collapse
Affiliation(s)
- D Y Wu
- Department of Pathology, School of Medicine, University of Connecticut Health Center, Farmington, CT 06030, USA
| | | |
Collapse
|
26
|
Xin Y, Li XL, Wang YP, Zhang SM, Zheng HC, Wu DY, Zhang YC. Relationship between phenotypes of cell-function differentiation and pathobiological behavior of gastric carcinomas. World J Gastroenterol 2001; 7:53-9. [PMID: 11819733 PMCID: PMC4688701 DOI: 10.3748/wjg.v7.i1.53] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/18/2000] [Revised: 06/16/2000] [Accepted: 06/23/2000] [Indexed: 02/06/2023] Open
Abstract
AIM To reveal the correlation between the functional differentiation phenotypes of gastric carcinoma cells and the invasion and metastasis by a new way of cell-function classification. METHODS Surgically resected specimens of 361 gastric carcinomas(GC) were investigated with enzyme-, mucin-, and tumor-related marker immunohistochemistry. According to the direction of cell-function differentiation, stomach carcinomas were divided into five functionally differentiated types. RESULTS (1) Absorptive function differentiation type (AFDT): there were 82 (22.7%) patients including 76 (92.7%) aged 45 years. Sixty-nine (84.1%) cases belonged to the intestinal type. Thirty-eight (46.3%) expressed CD44v6 and 9 (13.6%) of 66 male patients developed liver metastasis. The 5-year survival rate of patients in this group (58.5%) was higher than those with the other types (P<0.01). (2) Mucin secreting function differentiation type (MSFDT): 54 (15%) cases. Fifty-three (98.1%) tumors had penetrated the serosa, 12 (22.2%) expressed ER and 22 (40.7%) expressed CD44v6. The postoperative 5-year survival rate was 28.6%. (3) Absorptive and mucin-producing function differentiation type (AMPFDT): there were 180 (49.9%) cases, including 31 (17.2%) aged younger than 45 years. The tumor was more common in women (62, 34.4%,) and expressed more frequently estrogen receptors (ER) (129, 81.7%) than other types (P<0.01). Ovary metastasis was found in 12 (19.4%) out of 62 female subjects. The patients with this type GC had the lowest 5-year survival rate (24.7%) among all types. (4) Specific function differentiation type (SFDT): 13 (3.6%) cases. Nine (69.2%) tumors of this type derived from APUD system, the other 4 (30.7%) were of different histological differentiation. Sixty per cent of the patients survived at least five years. (5) Non-function differentiation type (NFDT): 32 (8.9%) cases. Nineteen (59.4%) cases had lymph node metastases but no one with liver or ovary metastasis. The 5-year survival rate was 28.1%. CONCLUSION This new cell-function classification of GC is helpful in indicating the characteristics of invasion and metastasis of GC with different cell-function differentiation phenotypes. Further study is needed to disclose the correlation between the cell-functional differentiation phenotypes and the relevant genotypes and the biological behavior of gastric carcinoma.
Collapse
Affiliation(s)
- Y Xin
- The Fourth Laboratory of Cancer Institute, China Medical University, Shenyang 110001, Liaoning Province, China
| | | | | | | | | | | | | |
Collapse
|
27
|
Tian WD, Wei XL, Wu DY, Li J, Sheng HZ. Analysis of ingredient and heating value of municipal solid waste. J Environ Sci (China) 2001; 13:87-91. [PMID: 11590726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Great differences between municipal solid wastes (MSW) produced at different places and different times in terms of such parameters as physical ingredient and heating value lead to difficulty in effective handling of MSW. In this paper, ingredient, heating value and their temporal varying trends of typical MSW in Beijing were continuously measured and analyzed. With consideration of the process in pyrolysis and incineration, correlation between physical ingredients and heating values was induced, favorable for evaluation of heating value needed in handling of MSW from simple analysis of physical ingredients of it.
Collapse
Affiliation(s)
- W D Tian
- Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China
| | | | | | | | | |
Collapse
|
28
|
Abstract
The multiprotein human SWI-SNF (hSWI-SNF) complex is a chromatin-remodeling machine that facilitates transcription by overcoming chromatin-mediated gene repression. We had previously shown that hSNF5/INI1, an intrinsic, consistent component of the hSWI/SNF complex, is associated with Epstein-Barr nuclear antigen 2 (EBNA2) and have proposed that EBNA2 directs this complex to key EBNA2-responsive viral and cellular genes. Using chromatin immunoprecipitation and quantitative PCR, we show that antibodies directed against components of the hSWI-SNF complex preferentially precipitate chromatin-associated DNA that contains a targeted EBNA2-responsive element in the context of both episomal and cellular chromatin. This enrichment does not occur in EBNA2-negative cells or when the EBNA2-responsive element is mutated. The stable association of the hSWI-SNF complex with the EBNA2-responsive promoter can also be disrupted by deletion of the TATA element, suggesting that EBNA2 in itself is insufficient to mediate stable targeting of the hSWI-SNF complex. These results demonstrate that recruitment of the hSWI-SNF complex to selected promoters can occur in vivo through its interaction with site-specific activator proteins and that stable targeting may require the presence of basal transcription factors.
Collapse
Affiliation(s)
- D Y Wu
- Division of Medical Oncology, Department of Medicine, Veterans Administration Puget Sound Health Care System, Seattle Division, Seattle, Washington 98108, USA
| | | | | |
Collapse
|
29
|
Adler HT, Chinery R, Wu DY, Kussick SJ, Payne JM, Fornace AJ, Tkachuk DC. Leukemic HRX fusion proteins inhibit GADD34-induced apoptosis and associate with the GADD34 and hSNF5/INI1 proteins. Mol Cell Biol 1999; 19:7050-60. [PMID: 10490642 PMCID: PMC84700 DOI: 10.1128/mcb.19.10.7050] [Citation(s) in RCA: 123] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
One of the most common chromosomal abnormalities in acute leukemia is a reciprocal translocation involving the HRX gene (also called MLL, ALL-1, or HTRX) at chromosomal locus 11q23, resulting in the formation of HRX fusion proteins. Using the yeast two-hybrid system and human cell culture coimmunoprecipitation experiments, we show here that HRX proteins interact directly with the GADD34 protein. We have found that transfected cells overexpressing GADD34 display a significant increase in apoptosis after treatment with ionizing radiation, indicating that GADD34 expression not only correlates with apoptosis but also can enhance apoptosis. The amino-terminal third of the GADD34 protein was necessary for this observed increase in apoptosis. Furthermore, coexpression of three different HRX fusion proteins (HRX-ENL, HRX-AF9, and HRX-ELL) had an anti-apoptotic effect, abrogating GADD34-induced apoptosis. In contrast, expression of wild-type HRX gave rise to an increase in apoptosis. The difference observed here between wild-type HRX and the leukemic HRX fusion proteins suggests that inhibition of GADD34-mediated apoptosis may be important to leukemogenesis. We also show here that GADD34 binds the human SNF5/INI1 protein, a member of the SNF/SWI complex that can remodel chromatin and activate transcription. These studies demonstrate, for the first time, a gain of function for leukemic HRX fusion proteins compared to wild-type protein. We propose that the role of HRX fusion proteins as negative regulators of post-DNA-damage-induced apoptosis is important to leukemia progression.
Collapse
Affiliation(s)
- H T Adler
- VA Puget Sound Health Care System, Seattle, Washington 98108, USA
| | | | | | | | | | | | | |
Collapse
|
30
|
Wu DY, Goldschneider I. Cyclosporin A-induced autologous graft-versus-host disease: a prototypical model of autoimmunity and active (dominant) tolerance coordinately induced by recent thymic emigrants. J Immunol 1999; 162:6926-33. [PMID: 10352315] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
Cyclosporin A (CSA)-induced autologous graft-vs-host disease (autoGVHD) is an autoimmune syndrome initiated by autoeffector T cells presumed to be exported from the thymus during CSA treatment. The appearance of noncytotoxic immunoregulatory T cell activity after cessation of CSA treatment is also thymus dependent. In the present study, we have tested the hypothesis that both autoeffector and immunoregulatory T cells in CSA-treated rats are recent thymic emigrants (RTEs). Local syngeneic graft-vs-host reaction (synGVHR) and timed thymectomy (Tx) assays revealed that autoeffector T cells appear initially in the thymus and are promptly exported to lymph nodes (LN) during the first week of CSA treatment. In contrast, immunoregulatory thymocytes are first detectable by local synGVHR inhibition assays during the second week of CSA treatment but are not exported to LN until approximately 4 days post-CSA. Both the autoeffector and immunoregulatory T cells in LN express Thy-1, a selective marker for RTEs in the rat. However, the autoeffector RTEs have a CD4+8+ phenotype, whereas the immunoregulatory RTEs have a CD4+8- phenotype. Thus, the coordinate formation in and release from the thymus cortex and medulla of autoeffector and immunoregulatory T cells in CSA-treated rats directly demonstrates that centrally induced, nondeletional tolerance can serve as a fail-safe mechanism by which clones of autoeffector T cells that have escaped intrathymic negative selection for self-MHC class II Ag can be suppressed postthymically.
Collapse
Affiliation(s)
- D Y Wu
- Department of Pathology, School of Medicine, University of Connecticut Health Center, Farmington 06030, USA
| | | |
Collapse
|
31
|
Wu DY, Schneider GE, Silver J, Poston M, Jhaveri S. A role for tectal midline glia in the unilateral containment of retinocollicular axons. J Neurosci 1998; 18:8344-55. [PMID: 9763478 PMCID: PMC6792857] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/1997] [Revised: 07/23/1998] [Accepted: 07/30/1998] [Indexed: 02/09/2023] Open
Abstract
Retinal fibers approach close to the tectal midline but do not encroach on the other side. Just before the entry of retinal axons into the superior colliculus (SC), a group of radial glia differentiates at the tectal midline; the spatiotemporal deployment of these cells points to their involvement in the unilateral containment of retinotectal axons. To test for such a barrier function of the tectal midline cells, we used two lesion paradigms for disrupting their radial processes in the neonatal hamster: (1) a heat lesion was used to destroy the superficial layers of the right SC, including the midline region, and (2) a horizontally oriented hooked wire was inserted from the lateral edge of the left SC toward the midline and was used to undercut the midline cells, leaving intact the retinorecipient layers in the right SC. In both cases, the left SC was denervated by removing its contralateral retinal input. Animals were killed 12 hr to 2 weeks later, after intraocular injections of anterograde tracers to label the axons from the remaining eye. Both lesions resulted in degeneration of the distal processes of the tectal raphe glia and in an abnormal crossing of the tectal midline by retinal axons, leading to an innervation of the opposite ("wrong") tectum. The crossover occurred only where glial cell attachments were disrupted. These results document that during normal development, the integrity of the midline septum is critical in compartmentalizing retinal axons and in retaining the laterality of the retinotectal projection.
Collapse
Affiliation(s)
- D Y Wu
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
| | | | | | | | | |
Collapse
|
32
|
Abstract
A 39-year-old woman suffered from swelling and tenderness of the right leg for 31 years. Imaging studies showed a large soft tissue lesion on the right side extending from the proximal portion of the thigh to the ankle. She underwent several operations due to the leg mass and associated equinovarus deformity of the right ankle. The pathologic findings were those of an ossified cavernous hemangioma. This appears to be one of the largest hemangiomas to be reported. It revealed the three types of calcification characteristic of hemangiomas. Equinovarus deformity of the ankle caused by contracture of the calf in this case was probably related to repeated bleeding.
Collapse
Affiliation(s)
- Y C Wang
- Department of Radiology, Cathay General Hospital, Taipei, Taiwan
| | | | | | | | | |
Collapse
|
33
|
Wang Y, Goldschneider I, Foss D, Wu DY, O'Rourke J, Cone RE. Direct thymic involvement in anterior chamber-associated immune deviation: evidence for a nondeletional mechanism of centrally induced tolerance to extrathymic antigens in adult mice. The Journal of Immunology 1997. [DOI: 10.4049/jimmunol.158.5.2150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Abstract
Recent reports have suggested that the dichotomy between central (thymic) and peripheral T cell tolerance is not absolute and that self-tolerance in perinatal animals may also involve the intrathymic generation and release to the periphery of Ag-specific immunoregulatory T cells. We have expanded this concept to include tolerance to non self Ags administered extrathymically to adult animals. In this study, we use the anterior chamber-associated immune deviation (ACAID) to demonstrate that central regulation of acquired peripheral tolerance can be induced in adult mice by the intraocular administration of low doses of nonself Ag. The results show that adult thymectomy prevents the inhibition of trinitrophenol (TNP)-specific delayed-type hypersensitivity, which normally occurs after injection of TNP-BSA into the anterior chamber (AC) of the eye. Thymocytes obtained from mice 1 to 3 days, but not 5 to 7 days, after AC injection of TNP-BSA or BSA alone specifically transfer inhibition of delayed-type hypersensitivity to mice primed with the homologous Ag. The latter observation, when correlated with the time of onset of ACAID, suggests that immunoregulatory T cells are formed in the thymus within 24 h and are exported to the peripheral lymphoid tissues between 2 and 5 days after AC injection of Ag. Immunomagnetic separation of thymocytes revealed that the immunoregulatory activity resides within the minor subset of CD4-, CD8-, TCR-alphabeta+ cells, previously postulated to induce fas ligand-mediated apoptosis and Th1 to Th2 immune deviation. Hence, the present study identifies ACAID as a prototypical model of centrally induced, nondeletional tolerance to extrathymic nonself Ags.
Collapse
Affiliation(s)
- Y Wang
- Department of Pathology, University of Connecticut Health Center, Farmington 06030, USA
| | - I Goldschneider
- Department of Pathology, University of Connecticut Health Center, Farmington 06030, USA
| | - D Foss
- Department of Pathology, University of Connecticut Health Center, Farmington 06030, USA
| | - D Y Wu
- Department of Pathology, University of Connecticut Health Center, Farmington 06030, USA
| | - J O'Rourke
- Department of Pathology, University of Connecticut Health Center, Farmington 06030, USA
| | - R E Cone
- Department of Pathology, University of Connecticut Health Center, Farmington 06030, USA
| |
Collapse
|
34
|
Wang Y, Goldschneider I, Foss D, Wu DY, O'Rourke J, Cone RE. Direct thymic involvement in anterior chamber-associated immune deviation: evidence for a nondeletional mechanism of centrally induced tolerance to extrathymic antigens in adult mice. J Immunol 1997; 158:2150-5. [PMID: 9036960] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Recent reports have suggested that the dichotomy between central (thymic) and peripheral T cell tolerance is not absolute and that self-tolerance in perinatal animals may also involve the intrathymic generation and release to the periphery of Ag-specific immunoregulatory T cells. We have expanded this concept to include tolerance to non self Ags administered extrathymically to adult animals. In this study, we use the anterior chamber-associated immune deviation (ACAID) to demonstrate that central regulation of acquired peripheral tolerance can be induced in adult mice by the intraocular administration of low doses of nonself Ag. The results show that adult thymectomy prevents the inhibition of trinitrophenol (TNP)-specific delayed-type hypersensitivity, which normally occurs after injection of TNP-BSA into the anterior chamber (AC) of the eye. Thymocytes obtained from mice 1 to 3 days, but not 5 to 7 days, after AC injection of TNP-BSA or BSA alone specifically transfer inhibition of delayed-type hypersensitivity to mice primed with the homologous Ag. The latter observation, when correlated with the time of onset of ACAID, suggests that immunoregulatory T cells are formed in the thymus within 24 h and are exported to the peripheral lymphoid tissues between 2 and 5 days after AC injection of Ag. Immunomagnetic separation of thymocytes revealed that the immunoregulatory activity resides within the minor subset of CD4-, CD8-, TCR-alphabeta+ cells, previously postulated to induce fas ligand-mediated apoptosis and Th1 to Th2 immune deviation. Hence, the present study identifies ACAID as a prototypical model of centrally induced, nondeletional tolerance to extrathymic nonself Ags.
Collapse
Affiliation(s)
- Y Wang
- Department of Pathology, University of Connecticut Health Center, Farmington 06030, USA
| | | | | | | | | | | |
Collapse
|
35
|
Abstract
Epstein-Barr nuclear antigen 2 (EBNA2), one of the six viral nuclear proteins expressed in latently infected B lymphocytes, is essential to the immortalization of B cells by Epstein-Barr virus (EBV). EBNA2 promotes transcriptional transactivation of viral and cellular genes by acting as an adapter molecule that binds to cellular sequence-specific DNA-binding proteins, JK recombination signal-binding protein (RBP-JK), and PU.1 and engages multiple members of the RNA polymerase II transcription complex. In the present study, we show that EBNA2 also interacts with hSNF5/Ini1, the human homolog of the yeast transcription factor SNF5. Gel filtration fractionation of partially purified EBV-positive lymphocyte nuclear extracts shows that a fraction of EBNA2 coelutes with both hSNF5/Ini1 and BRG1, a human homolog of SWI/SNF2, in the high-molecular-mass region (1.5 to 2.0 MDa) of a Superose 6 chromatogram. An affinity-purified rabbit antibody directed against hSNF5/Ini1 coimmunoprecipitates EBNA2 from this high-molecular-mass nuclear protein fraction, demonstrating that EBNA2 and hSNF5/Ini1 interact in vivo. This interaction is restricted to a subpopulation of phosphorylated viral EBNA2. Deletion mutation analysis of EBNA2 shows that the proline-rich aminoterminal end and a domain within the divergent region of EBNA2 mediate EBNA2-hSNF5/Ini1 interaction. Since the SNF-SWI complex participates in gene regulation through the alteration of nucleosome configuration and may be a component of the RNA polymerase II holoenzyme, the EBNA2-hSNF5/Ini1 interaction supports the hypothesis that EBNA2 facilitates transcriptional transactivation by acting as a transcription adapter molecule. We postulate that EBNA2 engages the hSNF-SWI complex to generate an open chromatin conformation at the EBNA2-responsive target genes, thereby potentiating the function of the RBP-JK-EBNA2-polymerase II transcription complex.
Collapse
Affiliation(s)
- D Y Wu
- Department of Medicine, Veterans Affairs Medical Center, Seattle, Washington 98108, USA
| | | | | | | |
Collapse
|
36
|
Zhang J, Chunyu ST, You YL, Zhang QR, Yang SJ, Huang WZ, Wu DY, Zhuang XQ, Liu SP, Cai YQ, Du FY, Yuan XD, Wei XF, Zhao YK, Peng HS, Nilsen J. Soft-x-ray lasing at 32.6 nm in Ne-like Ti ions driven by 40 J of energy from two 650-ps laser pulses. Phys Rev A 1996; 53:3640-3646. [PMID: 9913308 DOI: 10.1103/physreva.53.3640] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
37
|
Wu DY, Wang LC, Mason CA, Goldberg DJ. Association of beta 1 integrin with phosphotyrosine in growth cone filopodia. J Neurosci 1996; 16:1470-8. [PMID: 8778298 PMCID: PMC6578544] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Filopodia of growth cones are key elements in the transduction of extracellular cues that guide axon growth during development. How they are specialized to carry out this role is poorly understood. We previously had found tyrosine phosphorylated protein to be heavily concentrated at the tips of many filopodia of Aplysia growth cones in certain culturing conditions, suggesting that tyrosine phosphorylation might be involved in filopodial specialization. Immunocytochemistry was used to analyze the protein composition of the tip aggregates to determine whether there was an association of the tip phosphorylation with any important extracellular cue. beta 1 integrin, a subunit of the receptor for laminin-type neurite growth promoters, coconcentrated with phosphotyrosine at filopodial tips of both Aplysia and mouse growth cones. Several observations indicated that the association of beta 1 integrin with phosphotyrosine is close. beta 1 integrin and phosphotyrosine are known to colocalize at focal contacts, sites of adhesion of cells to the extracellular matrix, but the composition and behavior of the tip aggregates mark them as distinct structures. Also found in the tip aggregates was a member of the ezrin-radixin-moesin family of proteins, which are thought to link membrane proteins to submembranous bundles of actin filaments. Use of an inhibitor of protein-tyrosine kinases to deplete tip phosphotyrosine also caused disappearance of beta 1 integrin from the tip, suggesting a role for tyrosine phosphorylation in facilitating interaction of growth cones with certain environmental cues by fostering the aggregation of receptors in filopodia.
Collapse
Affiliation(s)
- D Y Wu
- Department of Pharmacology, Columbia University, New York, New York 10032, USA
| | | | | | | |
Collapse
|
38
|
Abstract
Abnormalities in postthymic T cell development in the BB/W rat model of autoimmune insulin-dependent diabetes mellitus (IDDM) result in part from a lymphopenia (lyp) gene defect. To better characterize these abnormalities, the phenotypes of T cells from diabetes-prone (DP) and diabetes-resistant (DR) coisogenic rats were analyzed by multiparameter flow immunocytometry (FCM). Marked decreases in the numbers of Thy1- RT6+ T cells, most of which are CD8+, were documented in DP rats by live-gating. Conversely, an approximately 3-fold increase was observed in the percentage of Thy1+ RT6- T cells, which normally serve as the precursors of both Thy1- RT6+ and Thy1- RT6- T cell subsets in rats. These results suggested that, at a minimum, an arrest in maturation of the Thy1+ precursors of RT6+ T cells occurs postthymically in DP rats. To determine more precisely the stage(s) in T cell development at which lymphopenia occurs, the export and fate of recent thymic emigrants (RTE's) and their immediate descendants in DP rats was traced after intrathymic (i.t.) labelling with fluorescein isothiocyanate (FITC). The results showed that in DP, as compared with DR, rats: 1) 5-fold fewer RTE's are exported from the thymus per 24 hr; 2) more than 80% of the RTE's are CD4+; 3) most of the immediate descendants of RTE's disappear from the peripheral lymphoid tissues within one week after export from the thymus; and 4) few of the descendants of the RTE's that do survive differentiate into RT6+ T cells. Staining with propidium iodide revealed that a significantly higher proportion of Thy1+ T cells in DP than in DR rats are in cycle (S/G2/M), thereby accounting for their disproportionately high numbers relative to RTE's. These results indicate that, in addition to defective thymic export, most of the immediate descendants of RTE's in DP rats undergo non-productive proliferation and death at the time (3-7 days postthymic) at which their counterparts in DR rats differentiate into Thy1- RT6+ T cells. The resulting deficiency of immunoregulatory T cells, acting in concert with defective intrathymic selection of effector T cell precursors, appears to conspire to markedly enhance the predisposition of DP rats to autoimmunity.
Collapse
Affiliation(s)
- H H Zadeh
- Department of Pathology, School of Medicine, University of Connecticut Health Center, Farmington 06030, USA
| | | | | | | | | |
Collapse
|
39
|
Goldberg DJ, Wu DY. Tyrosine phosphorylation and protrusive structures of the growth cone. Perspect Dev Neurobiol 1996; 4:183-92. [PMID: 9168200] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Protein-tyrosine kinase, such as those of the trk and Eph families, serve as membrane receptors for extracellular cues which regulate the rate and direction of growth of numerous groups of axons. Certain cytoplasmic protein-tyrosine kinases, such as src, are also abundant in growth cones. But, how protein-tyrosine phosphorylation regulates the growth cone is poorly understood. We discuss here potential roles for tyrosine phosphorylation in the protrusive structures of the growth cone, especially filopodia, which are important in detecting cues. A particular focus is the integrin receptor for substrate-bound growth promoters like laminin. Changes in tyrosine phosphorylation may be important in both facilitating and mediating the interaction of filopodia with these growth promoters.
Collapse
Affiliation(s)
- D J Goldberg
- Department of Pharmacology and Center for Neurobiology and Behavior, Columbia University, New York, NY 10032, USA
| | | |
Collapse
|
40
|
Jeng CM, Wu DY, Shih CC, Lee WY, Kung CH, Lau MK. Computed tomography and magnetic resonance imaging of diffuse pigmented villonodular synovitis: report of a case. J Formos Med Assoc 1995; 94:638-40. [PMID: 8527969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
We describe the computed tomographic (CT) and magnetic resonance imaging (MRI) features of a surgically proven case of diffuse pigmented villonodular synovitis (PVNS) of the knee in a 34-year-old woman. A complex mass consisting of solid and multicystic components was clearly demonstrated by CT and MRI. The solid part showed homogeneous hypodense attenuation relative to adjacent muscles on CT scans, but it showed inhomogeneous signal intensity on spin echo T1- and T2-weighted images (WI). The solid component enhanced homogeneously on CT scans but heterogeneously on MR images. Multiseptated enhancement of the cystic component on both CT and MR images were displayed. All of the above features were better demonstrated on MRI. Multiple marked hypointense round and patchy areas, and also a few areas isointense to subcutaneous fat within the lesion were also found on T1WI, proton density WI and T2WI. These characteristic MRI features of PVNS correlated well with its histologic structures: depositions of hemosiderin and fat in the proliferative synovial villi and bloody cystic content. These features may help to distinguish PVNS from other disease entities arising from the synovium.
Collapse
Affiliation(s)
- C M Jeng
- Department of Radiology, Cathay General Hospital, Taipei, Taiwan ROC
| | | | | | | | | | | |
Collapse
|
41
|
Abstract
The activity of motile protrusions of the growth cone--filopodia, veils, and lamellipodia--is essential for directed growth of a neuronal process. The regulation of the formation of these protrusions is not well understood. Numerous filopodia and veils or lamellipodia form within minutes of transection of an Aplysia axon in culture, as the initial components of growth cones of regenerating neurites. Axotomy, therefore, provides a robust and reliable protocol for analyzing the formation of these protrusions. We evaluated the involvement of protein phosphorylation in the regulation of protrusive activity. Of the inhibitors of protein kinases assayed, only the inhibitors of protein tyrosine kinases--genistein, lavendustin A, herbimycin A, and erbstatin analogue--suppressed the formation of protrusions, as assessed by high magnification video microscopy. These drugs did not work by preventing resealing of the axon, as evident from visual inspection and by the unimpaired effectiveness of genistein or lavendustin in preventing formation of filopodia when applied after resealing. Inhibition of protein tyrosine kinases not only prevented the formation of actin-based protrusions, but also caused deterioration of the actin network underlying the protrusive area of preexisting growth cones. Consistent with an involvement of protein tyrosine phosphorylation in the generation of protrusive structures, immunocytochemistry revealed that aggregates of phosphotyrosine appeared at the margins of the axon, from which protrusions emerge shortly after axotomy. These results suggest a role for protein tyrosine phosphorylation in the formation and maintenance of actin-based protrusive structures.
Collapse
Affiliation(s)
- D J Goldberg
- Department of Pharmacology, Columbia University College of Physicians & Surgeons, New York, New York 10032, USA
| | | |
Collapse
|
42
|
Wu DY, Jhaveri S, Schneider GE. Glial environment in the developing superior colliculus of hamsters in relation to the timing of retinal axon ingrowth. J Comp Neurol 1995; 358:206-18. [PMID: 7560282 DOI: 10.1002/cne.903580204] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
We have examined the developmental changes of glial cell organization in the superior colliculus of embryonic and neonatal hamsters in reference to the known sequence of retinal axon ingrowth and arborization in the midbrain. Immunolocalization of vimentin, a marker for neuronal and glial cell precursors, reveals a uniform distribution of radially oriented cells, with perikarya located at the ventricular surface and thin, elongated processes fanning out toward the pia. These vimentin-positive cells, referred to as the lateral radial cells, are present in the tectum from embryonic day (E) 10 (earliest day examined) until approximately postnatal day (P) 5. Vimentin expression in the lateral radial cells decreases markedly during the second week of postnatal life: application of DiI to the ventricular surface reveals that the pial attachment of the lateral radial cells is withdrawn and that the radial processes are gradually pulled back toward the ventricular zone. By P14, virtually no vimentin-positive radial cells are detectable in the superior colliculus. At no time during development are the lateral radial cells immunopositive for the glial fibrillary acidic protein (GFAP); however, shorter, vimentin-positive astrocytic profiles can be seen in the tectum around the time the radial fibers have been withdrawn, suggesting that at least some radial cells are transformed into astrocytes that will colonize the mature colliculus. At approximately E12, a second group of cells, referred to as the midline radial glia, is detected at the tectal midline. These cells are tightly bundled, forming a raphe in the tectum. They are intensely vimentin positive from E13 until at least P14. From the time of birth, the midline radial cells also exhibit intense immunoreactivity for GFAP. The lateral radial cells are present in the superior colliculus prior to and during the period of neurogenesis but remain well past the time when collicular neuronal migration is completed. Pial processes of the lateral radial cells are present within the superficial tectal layers during the time retinal axons are entering this target; they may be involved in directing the growth and initial collateralization of retinotectal axons. Their withdrawal from retinorecipient collicular zones begins at about the time arbors are being elaborated on retinal axons. In contrast, the midline glia become distinct just prior to the time retinal axons enter the superior colliculus and persist during the time retinotectal projections are being fully established. These raphe glia may be involved in maintaining the laterality of the retinotectal projection.
Collapse
Affiliation(s)
- D Y Wu
- Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge 02139, USA
| | | | | |
Collapse
|
43
|
Wang YC, Lin FK, Hung KL, Wu DY. Brachial plexus neuropathy secondary to septic arthritis and osteomyelitis: report of two cases. Zhonghua Min Guo Xiao Er Ke Yi Xue Hui Za Zhi 1994; 35:449-454. [PMID: 7942033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Two infants, delivered uneventfully, later developed right brachial plexus palsy secondary to pyogenic osteomyelitis and arthritis of the right shoulder joint. Weakness of right arms occurred at the sixth and tenth days of age respectively. Both had right arm tenderness on palpation and passive movement. Roentgenograms of their right shoulder joints showed irregular radiolucency of the proximal margin of right humerus head. In both cases, electromyography revealed various degrees of significant denervation pattern for the C5-C7 innervated muscles. Pus culture from right shoulder joints grew Streptococcus viridans and Staphylococcus aureus, respectively. After antibiotic therapy and arthrotomy with drainage, weakness improved gradually following continuous rehabilitation. Follow-up at six months of age showed almost complete recovery of right upper extremity function in one patient, but mild residual weakness in the other. Follow-up electromyography studies showed continued improvement. The possible mechanism of this rare occurrence is discussed.
Collapse
Affiliation(s)
- Y C Wang
- Department of Pediatrics and Surgery, Cathay General Hospital, Taipei, Taiwan, R.O.C
| | | | | | | |
Collapse
|
44
|
Affiliation(s)
- D J Goldberg
- Department of Pharmacology, Columbia University, New York, NY 10032
| | | |
Collapse
|
45
|
Abstract
Several types of evidence suggest that protein-tyrosine phosphorylation is important during the growth of neuronal processes, but few specific roles, or subcellular localizations suggestive of such roles, have been defined. We report here a localization of tyrosine-phosphorylated protein at the tips of growth cone filopodia. Immunocytochemistry using a mAb to phosphorylated tyrosine residues revealed intense staining of the tips of most filopodia of Aplysia axons growing slowly on a polylysine substrate, but of few filopodia of axons growing rapidly on a substrate coated with Aplysia hemolymph, which has growth-promoting material. Cytochalasin D, which causes F-actin to withdraw rapidly from the growth cone, caused the tyrosine-phosphorylated protein to withdraw rapidly from filopodia, suggesting that the protein associates or interacts with actin filaments. Phosphotyrosine has previously been found concentrated at adherens junctions, where bundles of actin filaments terminate, but video-enhanced contrast-differential interference contrast and confocal interference reflection microscopy demonstrated that the filopodial tips were not adherent to the substrate. Acute application of either hemolymph or inhibitors of protein-tyrosine kinases to neurons on polylysine resulted in a rapid loss of intense staining at filopodial tips concomitant with a lengthening of the filopodia (and their core bundles of actin filaments). These results demonstrate that tyrosine-phosphorylated protein can be concentrated at the barbed ends of actin filaments in a context other than an adherens junction, indicate an association between changes in phosphorylation and filament dynamics, and provide evidence for tyrosine phosphorylation as a signaling mechanism in the filopodium that can respond to environmental cues controlling growth cone dynamics.
Collapse
Affiliation(s)
- D Y Wu
- Department of Pharmacology, Columbia University, New York 10032
| | | |
Collapse
|
46
|
Wu DY, Ugozzoli L, Pal BK, Qian J, Wallace RB. The effect of temperature and oligonucleotide primer length on the specificity and efficiency of amplification by the polymerase chain reaction. DNA Cell Biol 1991; 10:233-8. [PMID: 2012681 DOI: 10.1089/dna.1991.10.233] [Citation(s) in RCA: 111] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The polymerase chain reaction (PCR) is most effectively performed using a thermostable DNA polymerase such as that isolated from Thermus aquaticus. Since temperature and oligonucleotide length are known to control the specificity of oligonucleotide hybridization, we have investigated the effect of oligonucleotide length, base composition, and the annealing temperature on the specificity and efficiency of amplification by the PCR. Generally, the specificity of PCR is controlled by the length of the oligonucleotide and/or the temperature of annealing of the primer to the template. An empirical relationship between oligonucleotide length and ability to support amplification was determined. This relationship allows for the design of specific oligonucleotide primers. A model is proposed which helps explain the observed dependence of PCR on annealing temperature and length of the primer.
Collapse
Affiliation(s)
- D Y Wu
- Department of Molecular Biochemistry, Beckman Research Institute of the City of Hope, Duarte, CA 91010
| | | | | | | | | |
Collapse
|
47
|
Wu DY, Hayes K, Perl ML, Barklow T, Boyarski A, Burchat PR, Burke DL, Dorfan JM, Feldman GJ, Gladney L, Hanson G, Hollebeek RJ, Innes WR, Jaros JA, Karlen D, Klein SR, Lankford AJ, Larsen RR, LeClaire BW, Lockyer NS, Lüth V, Ong RA, Richter B, Riles K, Yelton JM, Abrams G, Amidei D, Baden AR, Boyer J, Butler F, Gidal G, Gold MS, Goldhaber G, Golding L, Haggerty J, Herrup D, Juricic I, Kadyk JA, Levi ME, Nelson ME, Rowson PC, Schellman H, Schmidke WB, Sheldon PD, Trilling GH, Wood DR, Schaad T. Radiative tau production and decay. Phys Rev D Part Fields 1990; 41:2339-2342. [PMID: 10012615 DOI: 10.1103/physrevd.41.2339] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
|
48
|
Abstract
A novel DNA sequence detection method that utilizes the ligation of oligonucleotide pairs that are complementary to adjacent sites on appropriate DNA templates is described. The product is increased by either linear or exponential amplification using sequential rounds of template-dependent ligation. In the case of linear amplification, a single pair of oligonucleotides is ligated, the reaction is heated to dissociate the ligation product, and an additional round of ligation is performed. After n rounds there is a (1 + x) X n-fold amplification of product, where x is the efficiency of the ligation reaction. Exponential amplification utilizes two pairs of oligonucleotides, one complementary to the upper strand and one to the lower strand of a target sequence. The products of the ligation reaction serve as templates for subsequent rounds of ligation. In this case there is (1 + x)(n-1)-fold amplification of product after n rounds. A single base-pair mismatch between the annealed oligonucleotides and the template prevents ligation, thus allowing the distinction of single base-pair differences between DNA templates. At high template concentrations, the ligation reaction has an efficiency approaching 100%. In this report, we demonstrate the use of the ligation amplification reaction (LAR) to distinguish the normal from the sickle cell allele of the human beta-globin gene. We also report the use of LAR as a detection system for polymerase chain reaction-enriched DNA sequences.
Collapse
Affiliation(s)
- D Y Wu
- Department of Molecular Biochemistry, Beckman Research Institute of the City of Hope, Duarte, California 91010
| | | |
Collapse
|
49
|
Wu DY, Ugozzoli L, Pal BK, Wallace RB. Allele-specific enzymatic amplification of beta-globin genomic DNA for diagnosis of sickle cell anemia. Proc Natl Acad Sci U S A 1989; 86:2757-60. [PMID: 2704745 PMCID: PMC286997 DOI: 10.1073/pnas.86.8.2757] [Citation(s) in RCA: 440] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
A rapid nonradioactive approach to the diagnosis of sickle cell anemia is described based on an allele-specific polymerase chain reaction (ASPCR). This method allows direct detection of the normal or the sickle cell beta-globin allele in genomic DNA without additional steps of probe hybridization, ligation, or restriction enzyme cleavage. Two allele-specific oligonucleotide primers, one specific for the sickle cell allele and one specific for the normal allele, together with another primer complementary to both alleles were used in the polymerase chain reaction with genomic DNA templates. The allele-specific primers differed from each other in their terminal 3' nucleotide. Under the proper annealing temperature and polymerase chain reaction conditions, these primers only directed amplification on their complementary allele. In a single blind study of DNA samples from 12 individuals, this method correctly and unambiguously allowed for the determination of the genotypes with no false negatives or positives. If ASPCR is able to discriminate all allelic variation (both transition and transversion mutations), this method has the potential to be a powerful approach for genetic disease diagnosis, carrier screening, HLA typing, human gene mapping, forensics, and paternity testing.
Collapse
Affiliation(s)
- D Y Wu
- Department of Molecular Biochemistry, Beckman Research Institute of the City of Hope, Duarte, CA 91010
| | | | | | | |
Collapse
|
50
|
Wu DY, Nozari G, Schöld M, Conner BJ, Wallace RB. Direct analysis of single nucleotide variation in human DNA and RNA using in situ dot hybridization. DNA 1989; 8:135-42. [PMID: 2466624 DOI: 10.1089/dna.1.1989.8.135] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Using oligonucleotide hybridization, single and multiple nucleotide differences between alleles were detected directly in genomic DNA without electrophoretic separation. The DNA was immobilized in depressions in an agarose gel (in situ dots) and hybridized with radiolabeled, allele-specific oligonucleotide probes. An oligonucleotide complementary to a unique sequence region of the human major histocompatibility complex gene HLA-B27 only hybridized with genomic DNA from an HLA-B27-positive individual. Two other oligonucleotides complementary to the normal human beta-globin gene (beta A) and to the sickle cell globin gene (beta S) were synthesized. Using competition hybridization conditions which included the presence of a 10-fold molar excess of unlabeled oligonucleotide complementary to the other beta-globin allele, DNA from individuals homozygous for the normal beta-globin gene (beta A beta A) hybridized to the beta A probe exclusively, whereas DNA from individuals homozygous for the sickle cell globin gene (beta S beta S) hybridized only with the probe for the sickle cell gene. As expected, DNA from heterozygous individuals bound to both probes. Similar results were obtained with total human RNA immobilized in in situ dots. Possible applications of this methodology include genetic disease diagnosis, population carrier screening, HLA "DNA" typing, and DNA and RNA sequence polymorphism analysis.
Collapse
Affiliation(s)
- D Y Wu
- Department of Molecular Biochemistry, Beckman Research Institute of the City of Hope, Duarte, CA 91010
| | | | | | | | | |
Collapse
|