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Song SC, Ren BD, Wu XW, Xie YF, Cheng B, Wei Q, Pang WH, Wu ZK, Zhang XJ, Li XL, Xiao WL. Asiaticasics A-O, structurally intriguing coumarins from Toddalia asiatica with potential inflammatory inhibitory activity. Phytochemistry 2024; 221:114042. [PMID: 38417721 DOI: 10.1016/j.phytochem.2024.114042] [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: 08/25/2023] [Revised: 02/23/2024] [Accepted: 02/25/2024] [Indexed: 03/01/2024]
Abstract
Ethyl acetate fraction of Toddalia asiatica was fractionated to yield fifteen previously undescribed prenylated coumarins, asiaticasics A-O (1-15) along with nine (16-24) known derivatives. The structures of these undescribed coumarins were established by spectroscopic analysis and reference data. Biological activity evaluation showed that compound 3 with the IC50 value of 2.830 μM and compound 12 with the IC50 value of 0.682 μM owned anti-inflammatory activity by detecting the rate of lactate dehydrogenase release in pyroptosis J774A.1 cells. The results showed that the expression of Caspase-1 and IL-1β was decreased in a dose-dependent manner in the compound 12 treatment group, suggesting that compound 12 may reduce pyroptosis by inhibiting NLRP3 inflammasome. To further determine that compound 12 treatment can inhibit macrophage pyroptosis, morphological observation was performed and the results were consistent with the bioactivity evaluation.
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Affiliation(s)
- Si-Chen Song
- Key Laboratory of Medicinal Chemistry for Natural Resource of Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, and School of Pharmacy, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan University, Kunming, 650500, People's Republic of China
| | - Bai-Dong Ren
- Key Laboratory of Medicinal Chemistry for Natural Resource of Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, and School of Pharmacy, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan University, Kunming, 650500, People's Republic of China
| | - Xue-Wen Wu
- Key Laboratory of Medicinal Chemistry for Natural Resource of Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, and School of Pharmacy, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan University, Kunming, 650500, People's Republic of China
| | - Yi-Fan Xie
- Key Laboratory of Medicinal Chemistry for Natural Resource of Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, and School of Pharmacy, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan University, Kunming, 650500, People's Republic of China
| | - Bin Cheng
- Key Laboratory of Medicinal Chemistry for Natural Resource of Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, and School of Pharmacy, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan University, Kunming, 650500, People's Republic of China
| | - Qiong Wei
- Key Laboratory of Medicinal Chemistry for Natural Resource of Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, and School of Pharmacy, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan University, Kunming, 650500, People's Republic of China
| | - Wen-Hui Pang
- Key Laboratory of Medicinal Chemistry for Natural Resource of Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, and School of Pharmacy, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan University, Kunming, 650500, People's Republic of China
| | - Ze-Kai Wu
- Key Laboratory of Medicinal Chemistry for Natural Resource of Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, and School of Pharmacy, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan University, Kunming, 650500, People's Republic of China
| | - Xing-Jie Zhang
- Key Laboratory of Medicinal Chemistry for Natural Resource of Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, and School of Pharmacy, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan University, Kunming, 650500, People's Republic of China.
| | - Xiao-Li Li
- Key Laboratory of Medicinal Chemistry for Natural Resource of Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, and School of Pharmacy, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan University, Kunming, 650500, People's Republic of China.
| | - Wei-Lie Xiao
- Key Laboratory of Medicinal Chemistry for Natural Resource of Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, and School of Pharmacy, State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan University, Kunming, 650500, People's Republic of China; Southwest United Graduate School, Kunming, 650592, People's Republic of China.
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Ling YX, Xie YF, Wu HL, Wang XF, Ma JL, Fan L, Liu GY. Prognostic factors and clinical outcomes of breast cancer patients with disease progression during neoadjuvant systemic therapy. Breast 2023; 70:63-69. [PMID: 37352573 DOI: 10.1016/j.breast.2023.06.004] [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: 02/16/2023] [Revised: 06/07/2023] [Accepted: 06/09/2023] [Indexed: 06/25/2023] Open
Abstract
BACKGROUND Disease progression during neoadjuvant systemic therapy for breast cancer indicates poor prognosis, while predictors of the clinical outcomes of these patients remain unclear. By comparing the clinical outcomes of patients with different patterns of salvage treatment strategies, we try to evaluate the factors predicting distant failure and explore the favourable treatment for them. METHODS Patients with disease progression during neoadjuvant systemic therapy for stage I-III breast cancer diagnosed between January 1, 2008 and July 31, 2021 in Fudan University Shanghai Cancer Center were enrolled. Disease progression was defined as at least a 20% increase in the sum of diameters of target lesions or the appearance of new breast or nodal lesions. Kaplan-Meier, univariate and multivariate Cox proportional hazard regressions were utilized to compare survival outcomes between different salvage treatment strategies. RESULTS Among 3775 patients treated with NST, 60 (1.6%) patients encountered disease progression. A significant difference between the outcomes of patients receiving direct surgery and other salvage modalities was found (p = 0.007). Triple-negative breast cancer (p = 0.010) and not receiving direct surgery (p = 0.016) were independently associated with distant disease-free survival on multivariate analysis. CONCLUSIONS Predictors of distant failure in patients with disease progression include triple-negative breast cancer and not receiving direct surgery. Direct surgery seems to be more favourable than other treatments for patients with disease progression. For inoperable patients, neoadjuvant radiation can increase their operability but not improve their prognosis.
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Affiliation(s)
- Yun-Xiao Ling
- Department of Breast Surgery, Fudan University Shanghai Cancer Center, Shanghai, PR China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, PR China
| | - Yi-Fan Xie
- Department of Breast Surgery, Fudan University Shanghai Cancer Center, Shanghai, PR China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, PR China
| | - Huai-Liang Wu
- Department of Breast Surgery, Fudan University Shanghai Cancer Center, Shanghai, PR China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, PR China
| | - Xiao-Fang Wang
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, PR China; Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, PR China
| | - Jin-Li Ma
- Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, PR China; Department of Radiation Oncology, Fudan University Shanghai Cancer Center, Shanghai, PR China
| | - Lei Fan
- Department of Breast Surgery, Fudan University Shanghai Cancer Center, Shanghai, PR China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, PR China
| | - Guang-Yu Liu
- Department of Breast Surgery, Fudan University Shanghai Cancer Center, Shanghai, PR China; Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, PR China.
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Wu XW, Feng QL, Xie YF, Song SC, Cheng B, Ma Y, Li Q, Ji X, Li XL, Cao G, Xiao WL. Diverse diterpenoids from Callicarpa rubella Lindl. As natural inhibitors of macrophage foam cell formation. Phytochemistry 2023:113748. [PMID: 37286023 DOI: 10.1016/j.phytochem.2023.113748] [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] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Revised: 05/29/2023] [Accepted: 05/31/2023] [Indexed: 06/09/2023]
Abstract
Ten undescribed diterpenoids namely rubellawus E-N of structural types pimarane (1, 3-4), nor-abietane (2), nor-pimarane (5-6), isopimarane (7-9), and nor-isopimarane (10), along with eleven known compounds, were isolated and identified from the aerial parts of Callicarpa rubella Lindl. The structures of the isolated compounds were confirmed by comprehensive spectroscopic analyses and quantum chemical computations. Pharmacologically, almost all the compounds exhibited a potential inhibitory effect on oxidized low-density lipoprotein-induced macrophage foam cell formation, which suggests that these compounds may be promising candidates in the treatment of atherosclerosis.
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Affiliation(s)
- Xue-Wen Wu
- Key Laboratory of Medicinal Chemistry for Natural Resource of Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, and School of Medicine, Yunnan University, Kunming, 650091, PR China
| | - Qian-Lang Feng
- Key Laboratory of Medicinal Chemistry for Natural Resource of Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, and School of Medicine, Yunnan University, Kunming, 650091, PR China
| | - Yi-Fan Xie
- Key Laboratory of Medicinal Chemistry for Natural Resource of Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, and School of Medicine, Yunnan University, Kunming, 650091, PR China
| | - Si-Chen Song
- Key Laboratory of Medicinal Chemistry for Natural Resource of Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, and School of Medicine, Yunnan University, Kunming, 650091, PR China
| | - Bin Cheng
- Key Laboratory of Medicinal Chemistry for Natural Resource of Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, and School of Medicine, Yunnan University, Kunming, 650091, PR China
| | - Yan Ma
- Key Laboratory of Medicinal Chemistry for Natural Resource of Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, and School of Medicine, Yunnan University, Kunming, 650091, PR China
| | - Qing Li
- Key Laboratory of Medicinal Chemistry for Natural Resource of Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, and School of Medicine, Yunnan University, Kunming, 650091, PR China
| | - Xu Ji
- Key Laboratory of Medicinal Chemistry for Natural Resource of Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, and School of Medicine, Yunnan University, Kunming, 650091, PR China
| | - Xiao-Li Li
- Key Laboratory of Medicinal Chemistry for Natural Resource of Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, and School of Medicine, Yunnan University, Kunming, 650091, PR China; State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan University, Kunming, PR China.
| | - Guang Cao
- Key Laboratory of Medicinal Chemistry for Natural Resource of Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, and School of Medicine, Yunnan University, Kunming, 650091, PR China.
| | - Wei-Lie Xiao
- Key Laboratory of Medicinal Chemistry for Natural Resource of Ministry of Education, Yunnan Characteristic Plant Extraction Laboratory, Yunnan Research & Development Center for Natural Products, School of Chemical Science and Technology, and School of Medicine, Yunnan University, Kunming, 650091, PR China; State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan University, Kunming, PR China.
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Xie YF, Lin ZK, Shu R. [Analyzing the relevant factors affecting the clinical outcome of periodontal regeneration surgery]. Zhonghua Kou Qiang Yi Xue Za Zhi 2023; 58:386-392. [PMID: 37005788 DOI: 10.3760/cma.j.cn112144-20230207-00031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
Abstract
Periodontitis can lead to periodontal tissue defect, tooth mobility and loss, which seriously affects the quality of life. Periodontal regeneration surgery is an important treatment method for repairing periodontal defects, and it is also the hotspot of current periodontal clinical and basic research. A comprehensive understanding of the factors affecting the efficacy of periodontal regenerative surgery can improve clinicians' periodontal treatment concepts, increases the predictability of treatment results, and enhances the level of clinical diagnosis and periodontal treatment. In order to instruct the clinicians, this article will explain the basic principles of periodontal regeneration and the key points of periodontal wound healing, and analyze the elements of periodontal regeneration surgery, which including the patient-related factors, local factors, surgical factors and regenerative material selection.
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Affiliation(s)
- Y F Xie
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & College of Stomatology, Shanghai Jiao Tong University & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai 200011, China
| | - Z K Lin
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & College of Stomatology, Shanghai Jiao Tong University & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai 200011, China
| | - R Shu
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & College of Stomatology, Shanghai Jiao Tong University & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology, Shanghai 200011, China
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Lin ZK, Ma SJ, Qian JL, Lin SH, Xia YR, Xie YF, Wang HY, Shu R. [Association between periodontitis and mild cognitive impairment: a clinical pilot study]. Zhonghua Kou Qiang Yi Xue Za Zhi 2022; 57:576-584. [PMID: 35692001 DOI: 10.3760/cma.j.cn112144-20220414-00181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To evaluate the association between periodontitis and mild cognitive impairment (MCI), and explore the potential local oral risk factors for MCI. Methods: The study included 70 middle-aged and elderly subjects (44 females and 26 males) with periodontal disease who were first diagnosed by the Department of Periodontology or referred by the Department of Geriatrics in Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine from January 2021 to January 2022. In this study, the control group consisted of periodontal disease patients without cognitive impairment, and the case group (MCI group) consisted of those diagnosed with MCI referred by the geriatrics specialists. Full-mouth periodontal examinations of all subjects were performed and periodontal indicators were recorded by periodontists, while digital panoramic radiographs were taken. The severity of periodontitis was defined according to the 1999 classification, and the staging and grading of periodontitis were defined according to the 2018 American Academy of Periodontology and European Federation of Periodontology classification. The mini-mental state examination scale was chosen by geriatricians to evaluate the cognitive function of the included subjects. The cubital venous blood was drawn to detect the expression levels of inflammatory factors such as hypersensitive C-reactive protein (hs-CRP), interleukin (IL)-1β, IL-6 and tumor necrosis factor-α(TNF-α) in serum. Independent-samples t test and chi-square test were used to analyze the differences in population factors, periodontal-related indexes and serum inflammatory factors between the two groups (α=0.05). Odds ratios (OR) for MCI according to the severity of periodontitis and main periodontal clinical indexes were calculated by binary Logistic analysis. Results: Thirty-nine subjects were included in the control group and thirty-one in the MCI group. The age of the study population was (58.3±6.2) years (range: 45-70 years). The comparison between two groups showed that the control group was with higher educational background (χ²=9.45, P=0.024) and 2.6 years younger than the MCI group [(57.1±6.0) years vs. (59.7±6.3) years, t=-1.24, P=0.082]. The number and proportion of moderate to severe periodontitis in control group were significantly lower compared to those in MCI group (17 cases with 43.6% vs. 23 cases with 74.2%, χ²=6.61, P=0.010), and the OR of moderate to severe periodontitis adjusted by age and educational background was 3.00 (95%CI: 1.01-8.86, P=0.048). Compared with the grading (χ²=5.56, P=0.062) of periodontitis, staging had a greater impact on MCI (χ²=7.69, P=0.041), moreover the proportion of MCI in stage Ⅰ grade A periodontitis was significantly lower than any other type of periodontitis (χ²=13.86, P=0.036). In addition, less presence of deep periodontal pockets [probing depth (PD)≥6 mm] (17.9% vs. 41.9%, χ²=4.87, P=0.027), fewer number of PD≥4 mm (6.48±6.70 vs. 11.03±8.91, t=-2.44, P=0.017), lower plaque index (1.42±0.56 vs. 1.68±0.57, t=-1.91, P=0.059) and gingival index (1.68±0.29 vs. 1.96±0.30, t=-3.93, P<0.001) were in the control group than in the MCI group. However, there were no significant differences between the two groups in the levels of serum inflammatory factors, such as hs-CRP, IL-1β, IL-6 and TNF-α (P>0.05). Conclusions: It appears a strong correlation between moderate to severe periodontitis and the incidence of MCI in middle-aged and elderly people. Moreover, deep and increased number of periodontal pockets, poor oral hygiene, and severe gingival inflammation can be potentially associated risk factors for MCI.
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Affiliation(s)
- Z K Lin
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & College of Stomatology, Shanghai Jiao Tong University & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Shanghai Key Laboratory of Stomatology, Shanghai 200011, China
| | - S J Ma
- Department of Geriatrics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
| | - J L Qian
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & College of Stomatology, Shanghai Jiao Tong University & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Shanghai Key Laboratory of Stomatology, Shanghai 200011, China
| | - S H Lin
- Department of Geriatrics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
| | - Y R Xia
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & College of Stomatology, Shanghai Jiao Tong University & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Shanghai Key Laboratory of Stomatology, Shanghai 200011, China
| | - Y F Xie
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & College of Stomatology, Shanghai Jiao Tong University & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Shanghai Key Laboratory of Stomatology, Shanghai 200011, China
| | - H Y Wang
- Department of Geriatrics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, China
| | - Rong Shu
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & College of Stomatology, Shanghai Jiao Tong University & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Shanghai Key Laboratory of Stomatology, Shanghai 200011, China
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Yang F, Sun R, Hou Z, Zhang FL, Xiao Y, Yang YS, Yang SY, Xie YF, Liu YY, Luo C, Liu GY, Shao ZM, Li DQ. HSP90 N-terminal inhibitors target oncoprotein MORC2 for autophagic degradation and suppress MORC2-driven breast cancer progression. Clin Transl Med 2022; 12:e825. [PMID: 35522895 PMCID: PMC9076019 DOI: 10.1002/ctm2.825] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [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: 10/28/2021] [Revised: 03/29/2022] [Accepted: 04/04/2022] [Indexed: 12/14/2022] Open
Abstract
Aims MORC family CW‐type zinc finger 2 (MORC2), a GHKL‐type ATPase, is aberrantly upregulated in multiple types of human tumors with profound effects on cancer aggressiveness, therapeutic resistance, and clinical outcome, thus making it an attractive drug target for anticancer therapy. However, the antagonists of MORC2 have not yet been documented. Methods and Results We report that MORC2 is a relatively stable protein, and the N‐terminal homodimerization but not ATP binding and hydrolysis is crucial for its stability through immunoblotting analysis and Quantitative real‐time PCR. The N‐terminal but not C‐terminal inhibitors of heat shock protein 90 (HSP90) destabilize MORC2 in multiple cancer cell lines, and strikingly, this process is independent on HSP90. Mechanistical investigations revealed that HSP90 N‐terminal inhibitors disrupt MORC2 homodimer formation without affecting its ATPase activities, and promote its lysosomal degradation through the chaperone‐mediated autophagy pathway. Consequently, HSP90 inhibitor 17‐AAG effectively blocks the growth and metastatic potential of MORC2‐expressing breast cancer cells both in vitro and in vivo, and these noted effects are not due to HSP90 inhibition. Conclusion We uncover a previously unknown role for HSP90 N‐terminal inhibitors in promoting MORC2 degradation in a HSP90‐indepentent manner and support the potential application of these inhibitors for treating MORC2‐overexpressing tumors, even those with low or absent HSP90 expression. These results also provide new clue for further design of novel small‐molecule inhibitors of MORC2 for anticancer therapeutic application.
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Affiliation(s)
- Fan Yang
- Fudan University Shanghai Cancer Center and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China.,Cancer Institute, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Breast Surgery, Shanghai Medical College, Fudan University, Shanghai, China
| | - Rui Sun
- Fudan University Shanghai Cancer Center and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Zeng Hou
- School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, UCAS, Hangzhou, China.,Drug Discovery and Design Center, The Center for Chemical Biology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,Department of Pharmacy, University of Chinese Academy of Sciences, Beijing, China
| | - Fang-Lin Zhang
- Fudan University Shanghai Cancer Center and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Yi Xiao
- Fudan University Shanghai Cancer Center and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China.,Cancer Institute, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Breast Surgery, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yun-Song Yang
- Fudan University Shanghai Cancer Center and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China.,Cancer Institute, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Breast Surgery, Shanghai Medical College, Fudan University, Shanghai, China
| | - Shao-Ying Yang
- Fudan University Shanghai Cancer Center and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China
| | - Yi-Fan Xie
- Fudan University Shanghai Cancer Center and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China.,Cancer Institute, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Breast Surgery, Shanghai Medical College, Fudan University, Shanghai, China
| | - Ying-Ying Liu
- Fudan University Shanghai Cancer Center and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China.,Cancer Institute, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Breast Surgery, Shanghai Medical College, Fudan University, Shanghai, China
| | - Cheng Luo
- School of Pharmaceutical Science and Technology, Hangzhou Institute for Advanced Study, UCAS, Hangzhou, China.,Drug Discovery and Design Center, The Center for Chemical Biology, State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,Department of Pharmacy, University of Chinese Academy of Sciences, Beijing, China
| | - Guang-Yu Liu
- Fudan University Shanghai Cancer Center and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China.,Cancer Institute, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Breast Surgery, Shanghai Medical College, Fudan University, Shanghai, China.,Shanghai Key Laboratory of Breast Cancer, Shanghai Medical College, Fudan University, Shanghai, China
| | - Zhi-Min Shao
- Fudan University Shanghai Cancer Center and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China.,Cancer Institute, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Breast Surgery, Shanghai Medical College, Fudan University, Shanghai, China.,Shanghai Key Laboratory of Breast Cancer, Shanghai Medical College, Fudan University, Shanghai, China.,Shanghai Key Laboratory of Radiation Oncology, Shanghai Medical College, Fudan University, Shanghai, China
| | - Da-Qiang Li
- Fudan University Shanghai Cancer Center and Shanghai Key Laboratory of Medical Epigenetics, International Co-laboratory of Medical Epigenetics and Metabolism, Ministry of Science and Technology, Institutes of Biomedical Sciences, Fudan University, Shanghai, China.,Cancer Institute, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Oncology, Shanghai Medical College, Fudan University, Shanghai, China.,Department of Breast Surgery, Shanghai Medical College, Fudan University, Shanghai, China.,Shanghai Key Laboratory of Breast Cancer, Shanghai Medical College, Fudan University, Shanghai, China.,Shanghai Key Laboratory of Radiation Oncology, Shanghai Medical College, Fudan University, Shanghai, China
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Sun WT, Zhou KC, Shu R, Xie YF. [Alveolar ridge augmentation using a modified cortical bone fixation technique: a case report]. Zhonghua Kou Qiang Yi Xue Za Zhi 2021; 56:1025-1029. [PMID: 34619898 DOI: 10.3760/cma.j.cn112144-20201211-00613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- W T Sun
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & College of Stomatology, Shanghai Jiao Tong University & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Shanghai Key Laboratory of Stomatology, Shanghai 200011, China
| | - K C Zhou
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & College of Stomatology, Shanghai Jiao Tong University & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Shanghai Key Laboratory of Stomatology, Shanghai 200011, China
| | - R Shu
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & College of Stomatology, Shanghai Jiao Tong University & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Shanghai Key Laboratory of Stomatology, Shanghai 200011, China
| | - Y F Xie
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & College of Stomatology, Shanghai Jiao Tong University & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Shanghai Key Laboratory of Stomatology, Shanghai 200011, China
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Xie YF. [Periodontally accelerated osteogenic orthodontics in clinical treatment]. Zhonghua Kou Qiang Yi Xue Za Zhi 2021; 56:978-982. [PMID: 34619890 DOI: 10.3760/cma.j.cn112144-20210726-00339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Orthodontic tooth movement inevitably affects adjacent periodontal tissue. The labiobuccal alveolar bone is generally thin, and patients with dental crowding often present alveolar dehiscence and fenestration. These may lead to prolonged treatment time, even gingival atrophy, tooth loosening and other complications in the orthodontic tooth movement. Periodontally accelerated osteogenic orthodontics (PAOO) could accelerate the orthodontic tooth movement and promote the formation of new bone by using corticotomy and bone grafting. This article, starting from the influence of orthodontic treatment on periodontal hard tissue, describes the application of PAOO in orthodontic treatment.
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Affiliation(s)
- Y F Xie
- Department of Periodontology, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine & College of Stomatology, Shanghai Jiao Tong University & National Center for Stomatology & National Clinical Research Center for Oral Diseases & Shanghai Key Laboratory of Stomatology, Shanghai 200011, China
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Xie YF, Zeng J, Liu ZQ. [Tonsillectomy as a treatment for SAPHO syndrome: a case report]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2021; 56:1102-1104. [PMID: 34666473 DOI: 10.3760/cma.j.cn115330-20201217-00929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Y F Xie
- Department of Otolaryngology-Head and Neck Surgery, Peking University Third Hospital,Beijing 100191,China
| | - J Zeng
- Department of Otolaryngology-Head and Neck Surgery, Peking University Third Hospital,Beijing 100191,China
| | - Z Q Liu
- Department of Otolaryngology-Head and Neck Surgery, Peking University Third Hospital,Beijing 100191,China
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Yang LF, Yang F, Zhang FL, Xie YF, Hu ZX, Huang SL, Shao ZM, Li DQ. Discrete functional and mechanistic roles of chromodomain Y-like 2 (CDYL2) transcript variants in breast cancer growth and metastasis. Am J Cancer Res 2020; 10:5242-5258. [PMID: 32373210 PMCID: PMC7196301 DOI: 10.7150/thno.43744] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 03/09/2020] [Indexed: 12/28/2022] Open
Abstract
Rationale: Chromodomain Y-like 2 (CDYL2) is a member of the CDY gene family involved in spermatogenesis, but its role in human cancer has not been reported. Analyses of publicly available databases demonstrate that CDYL2 is abundantly expressed in breast tumors. However, whether CDYL2 is involved in breast cancer progression remains unknown. Methods: Quantitative real-time PCR and immunoblotting assays were used to determine the expression levels of CDYL2 transcript variants in breast cancer cell lines and primary breast tumors. The effect of CDYL2 transcript variants on the malignant phenotypes of breast cancer cells was examined through in vitro and in vivo assays. Immunofluorescent staining, RNA-seq, ATAC-seq, and ChIP-qPCR were used to investigate the underlying mechanisms behind the aforementioned observations. Results: Here we show that CDYL2 generated four transcript variants, named CDYL2a-CDYL2d. CDYL2a and CDYL2b were the predominant variants expressed in breast cancer cell lines and breast tumors and exerted strikingly discrete functions in breast cancer growth and metastasis. CDYL2a was upregulated in the majority of the breast cancer cell lines and tumors, and promoted breast cancer cell proliferation, colony formation in vitro, and tumorigenesis in xenografts. In contrast, CDYL2b was mainly expressed in luminal- and HER2-positive types of breast cancer cell lines and tumors, and suppressed the migratory, invasive, and metastatic potential of breast cancer cells in vitro and in vivo. Mechanistically, CDYL2a partially localized to SC35-positive nuclear speckles and promoted alternative splicing of a subset of target genes, including FIP1L1, NKTR, and ADD3 by exon skipping. Elimination of full-length FIP1L1, NKTR, and ADD3 rescued the impaired cell proliferation through CDYL2a depletion. In contrast, CDYL2b localized to heterochromatin and transcriptionally repressed several metastasis-promoting genes, including HPSE, HLA-F, and SELL. Restoration of HPSE, HLA-F, or SELL expression in CDYL2b-overexpressing cells attenuated the ability of CDYL2b to suppress breast cancer cell migration and invasion. Conclusions: Collectively, these findings establish an isoform-specific function of CDYL2 in breast cancer development and progression and highlight that pharmacological inhibition of the CDYL2a, but not the CDYL2b, isoform may be an effective strategy for breast cancer therapy.
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Sun M, Li HX, Xie YF, Xu H, Liu F, Chen JY. [Outcomes after singleversus bilateral lung transplantation for idiopathic pulmonary fibrosis]. Zhonghua Jie He He Hu Xi Za Zhi 2016; 39:444-9. [PMID: 27289573 DOI: 10.3760/cma.j.issn.1001-0939.2016.06.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To compare outcomes after single and bilateral lung transplantation in patients with idiopathic pulmonary fibrosis (IPF). METHODS 104 patients with IPF who underwent lung transplantation at Wuxi People's Hospital from January 2008 to February 2015 were evaluated. Recipients were divided into single lung transplantation (STL)group(41cases)and bilateral lung transplantation(BLT) group (63 cases). Preoperative characteristics, postoperative outcomes, postoperative complications, functional outcomes, survival and causes of death between the two groups were analyzed retrospectively. The patients were followed up by letter, call and outpatient visit. RESULTS Preoperative characteristics: The SLT group were significantly older (P<0.05), and had significantly higher systolic (P<0.05) pulmonary artery pressures than the BLT group. Postoperative outcomes: The intraoperative blood loss of SLT group as significantly less than BLT group (P<0.05). The cold ischemic time of SLT group as significantly shorter than BLT group (P<0.05). The BLT group was significantly more frequently required extracorporeal membrane oxygenation (ECMO) support than SLT group (P<0.05). There was no statistically significant difference inventilator support, reoperation, reintubation, length of ICU stay and death between the SLT and the BLT group (P>0.05). Postoperative complications: The BLT group had a higher incidence of primary graft dysfunction than the SLT group (P<0.05). There was no statistically significant difference in chest complications, acute rejection, airway complications, pulmonary infection between the SLT and the BLT group (P>0.05). Functional outcomes: FVC%, FEV1%, DLCO and 6-MWD, were significantly higher in the BLT group than the SLT group (P<0.05). SURVIVAL The overall survival rates at 1, 2 and 3 years were not different between the SLT and the BLT group (75.3%, 61.6% and 46.2% vs 79.1%, 68.6% and 53.4%, P>0.05). CONCLUSIONS The lung transplantationis an effective treatment for idiopathic pulmonary fibrosis, BLT could significantly improve the postoperative lung functionin comparison with STL, BLT may be a preferable operation for younger patients, especially if significant pulmonary hypertension is present.The short-term survival of BLT was similar to SLT, but long-term survivalstill needs further follow-up. Considering the quality of life, BLT is better than SLT.
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Affiliation(s)
- M Sun
- Department of Thoracic Surgery, Wuxi People's Hospital Affiliated to Nanjing Medical University, Wuxi 214000, China
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Tu LC, Wang ZW, Liu JQ, Huang XQ, Li Z, Xie YF, Luo J. Implementation of the scale factor balance on two pairs of quartz-flexure capacitive accelerometers by trimming bias voltage. Rev Sci Instrum 2014; 85:095108. [PMID: 25273773 DOI: 10.1063/1.4895647] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Gravity gradient measurement makes use of the difference between the outputs of pairs of linear accelerometers, which results in cancelling out the common mode accelerations caused by mounting platform and external environment. One of the key technologies is to match the acceleration-to-voltage or acceleration-to-current transfer functions of the pairs of the accelerometers to an extremely high degree of accuracy. The differential signals then make the gravity gradients observable. By using two pairs of the quartz-flexure accelerometers with a capacitive sensing and electrostatic closed-loop control, the electrostatic control bias voltages were trimming remotely and automatically in real time. Each pair of accelerometers was matched individually and then all four accelerometers were finally re-balanced. The experimental results show that the consistency of five digits is achieved at a noise level of ~5×10(-8) g/√Hz (1 g ≈ 9.8 m/s(2)) and the scale factors ranging from 0.25 to 0.32 V/mg. Further improvement to the achieved level of matching is limited by the intrinsic noise of the accelerometers used.
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Affiliation(s)
- L C Tu
- MOE Key Laboratory of Fundamental Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Z W Wang
- MOE Key Laboratory of Fundamental Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - J Q Liu
- MOE Key Laboratory of Fundamental Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - X Q Huang
- MOE Key Laboratory of Fundamental Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Z Li
- MOE Key Laboratory of Fundamental Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Y F Xie
- MOE Key Laboratory of Fundamental Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - J Luo
- MOE Key Laboratory of Fundamental Quantities Measurement, School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
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Yang LM, Xie YF, Gu ZH, Wang AL, Chen HZ, Lu Y. Development and validation of a reversed-phase HPLC method for determination of lesatropane and enantiomeric impurity. Chirality 2011; 23:581-4. [DOI: 10.1002/chir.20971] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2010] [Accepted: 04/26/2011] [Indexed: 11/09/2022]
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Awonuga AO, Zhong W, Abdallah ME, Slater JA, Zhou SC, Xie YF, Puscheck EE, Rappolee DA. Eomesodermin, HAND1, and CSH1 proteins are induced by cellular stress in a stress-activated protein kinase-dependent manner. Mol Reprod Dev 2011; 78:519-28. [PMID: 21710638 DOI: 10.1002/mrd.21342] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2010] [Accepted: 05/17/2011] [Indexed: 11/11/2022]
Abstract
Eomesodermin (Eomes) is a transcription factor essential for trophoblast development. Stress stimuli activate stress-activated protein kinase (MAPK8/9) and modulate transcription factors in trophoblast stem cells (TSC). In this study, we test the hypothesis that stress-induced Eomes upregulation and downstream trophoblast development are MAPK8/9-dependent. Immunocytochemical and immunoblot assays suggest that Eomes is induced by hyperosmolar stress in a dose- and time-dependent manner. Two MAPK8/9 inhibitors that work by different mechanisms, LJNKl1 and SP600125, block induction of Eomes protein by stress. During normal TSC differentiation, the transcription factor heart and neural crest derivatives expressed 1 (HAND1) is dependent on Eomes, and chorionic somatomammotropin hormone 1 (CSH1) expression is dependent on HAND1. Similar to Eomes, HAND1 and CSH1 induction by stress are MAPK8/9-dependent, and CSH1 is induced in nearly all stressed TSC. CSH1 induction normally requires downregulation of the transcription factor inhibitor of differentiation 2 (ID2) as well as HAND1 upregulation. It was shown previously that hyperosmolar stress induces AMP-activated protein kinase (PRKAA1/2)-dependent ID2 loss in a MAPK8/9-independent manner. Inhibition of PRKAA1/2 with compound C and LJNKl1, more than MAPK8/9 inhibitors alone, inhibits the induction of CSH1 by stress. Taken together these data suggest that stress-induced MAPK8/9 and PRKAA1/2 regulate transcription factors Eomes/HAND1 and ID2, respectively. Together this network mediates induction of CSH1 by stress. Therefore, stress triggers a proportional increase in a normal early TSC differentiation event that could be adaptive in inducing CSH1. But the flexibility of TSC to undergo stress-induced differentiation could lead to pathophysiological consequences if stress endured and TSC differentiation became unbalanced.
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Affiliation(s)
- A O Awonuga
- C.S. Mott Center for Human Growth and Development, Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Wayne State University School of Medicine, Detroit, Michigan 48201, USA
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Yang LM, Xie YF, Gu YF, Chen HZ, Lu Y. (1R,3S,5R,6S)-6-Acet-oxy-8-methyl-3-(p-tolyl-sulfon-yloxy)-8-azoniabicyclo-[3.2.1]octane (2R,3R)-2,3-bis-(benzo-yloxy)-3-carboxy-propanoate. Acta Crystallogr Sect E Struct Rep Online 2009; 65:o1037. [PMID: 21583856 PMCID: PMC2977720 DOI: 10.1107/s1600536809012732] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2009] [Accepted: 04/03/2009] [Indexed: 05/30/2023]
Abstract
The title compound, C(17)H(24)NO(5)S(+)·C(18)H(13)O(8) (-), is the key inter-mediate during the preparation of lesatropane [systematic name (1R,3S,5R,6S)-6-acetoxy-3-(4-methylphenylsulfonyloxy)tropane], a potential anti-glaucoma agent. The tertiary N atom of the tropane ring is involved in inter-molecular N-H⋯O hydrogen bonding, and the carboxylate groups are involved in inter-molecular O-H⋯O hydrogen bonding.
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Affiliation(s)
- Li-Min Yang
- Department of Pharmacy, Shanghai Jiao Tong University School of Medicine, South Chongqing Road 280, Shanghai 200025, People's Republic of China
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Xie YF, Zhang S, Chiang CY, Hu JW, Dostrovsky JO, Sessle BJ. Involvement of glia in central sensitization in trigeminal subnucleus caudalis (medullary dorsal horn). Brain Behav Immun 2007; 21:634-41. [PMID: 17055698 DOI: 10.1016/j.bbi.2006.07.008] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2006] [Revised: 07/21/2006] [Accepted: 07/28/2006] [Indexed: 12/22/2022] Open
Abstract
Central sensitization is a crucial mechanism underlying the increased excitability of nociceptive pathways following peripheral tissue injury and inflammation. We have previously demonstrated that the small-fiber excitant and inflammatory irritant mustard oil (MO) applied to the tooth pulp produces glutamatergic- and purinergic-dependent central sensitization in brainstem nociceptive neurons of trigeminal subnucleus caudalis (Vc). Recent studies have implicated both astrocytes and microglia in spinal nociceptive mechanisms, showing, for example, that inhibition of spinal astroglial metabolism or spinal microglial p38MAPK activation can attenuate hyperalgesia in inflammatory pain models but have not tested effects of glial inhibitors on central sensitization in functionally identified spinal nociceptive neurons. The aim of the present study was to determine whether glial cells are involved in the MO-induced central sensitization in Vc nociceptive neurons, by examining the effects of intrathecally applied SB203580 (SB), an inhibitor of p38MAPK, and fluoroacetate (FA), an inhibitor of the astroglial metabolic enzyme aconitase. During continuous superfusion of phosphate-buffered saline over Vc, MO application to the pulp-induced central sensitization in Vc nociceptive neurons reflected in significant increases in cutaneous mechanoreceptive field (RF) size and responses to noxious mechanical stimuli and a decrease in mechanical activation threshold. The i.t. application of SB or FA markedly attenuated the MO-induced increases in pinch RF size and responses to noxious stimuli and the decrease in activation threshold. Neither SB nor FA application significantly affected the baseline (i.e., pre-MO application) RF and response properties. These results suggest that glial metabolic processes are important in the development of Vc central sensitization.
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Affiliation(s)
- Y F Xie
- Department of Oral Physiology, Faculty of Dentistry, University of Toronto, 124 Edward Street, Toronto, Ont., Canada M5G 1G6
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Rosenfeld JV, Kaptigau WM, Xie YF. Neurosurgery in Papua New Guinea: quo vadis? P N G Med J 2007; 50:5-7. [PMID: 19354005] [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: 05/27/2023]
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Yang LM, Xie YF, Chen HZ, Lu Y. Diastereomeric and enantiomeric high-performance liquid chromatographic separation of synthetic anisodamine. J Pharm Biomed Anal 2007; 43:905-9. [PMID: 17049794 DOI: 10.1016/j.jpba.2006.09.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2006] [Revised: 08/16/2006] [Accepted: 09/04/2006] [Indexed: 11/24/2022]
Abstract
In order to investigate the enantiomeric pharmacokinetics and biotransformation of synthetic anisodamine (654-2), a cholinoceptor antagonist widely used in clinic in China, it has been preparatively separated into two racemates (I and II) by using ZORBAX Eclipse XDB-C18 column. The diastereo- and/or enantioseparations of 654-2, I and II were carried out by HPLC using CHIRALPAK AD-H as chiral stationary phase (CSP) and acetonitrile-2-propanol-DEA 97:3:0.1 (v/v/v) as mobile phase. The methods were optimized by studying mobile phase modifiers, concentration of modifier and column temperature. The HPLC method for the simultaneous separation of two pairs of enantiomers of 654-2 has been validated.
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Affiliation(s)
- Li-Min Yang
- Department of Pharmacy, Shanghai Jiao Tong University School of Medicine, South Chongqing Road 280, Shanghai 200025, China
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Zhang S, Chiang CY, Xie YF, Park SJ, Lu Y, Hu JW, Dostrovsky JO, Sessle BJ. Central sensitization in thalamic nociceptive neurons induced by mustard oil application to rat molar tooth pulp. Neuroscience 2006; 142:833-42. [PMID: 16934945 DOI: 10.1016/j.neuroscience.2006.06.063] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [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] [Received: 05/20/2006] [Revised: 06/19/2006] [Accepted: 06/20/2006] [Indexed: 11/15/2022]
Abstract
We have recently demonstrated that application of mustard oil (MO), a small-fiber excitant and inflammatory irritant, to the rat maxillary molar tooth pulp induces central sensitization that is reflected in changes in spontaneous activity, mechanoreceptive field (RF) size, mechanical activation threshold, and responses to graded mechanical stimuli applied to the neuronal RF in trigeminal brainstem subnucleus caudalis and subnucleus oralis. The aim of this study was to test whether central sensitization can be induced in nociceptive neurons of the posterior thalamus by MO application to the pulp. Single unit neuronal activity was recorded in the ventroposterior medial nucleus (VPM) or posterior nuclear group (PO) of the thalamus in anesthetized rats, and nociceptive neurons were classified as wide dynamic range (WDR) or nociceptive-specific (NS). MO application to the pulp was studied in 47 thalamic nociceptive neurons and found to excite over 50% of the 35 VPM neurons tested and to produce significant long-lasting (over 40 min) increases in spontaneous activity, cutaneous pinch RF size and responses to graded mechanical stimuli, and a decrease in threshold in the 29 NS neurons tested; a smaller but statistically significant increase in mean spontaneous firing rate and decrease in activation threshold occurred following MO in the six WDR neurons tested. Vehicle application to the pulp did not produce any significant changes in six VPM NS neurons tested. MO application to the pulp produced pronounced increases in spontaneous activity, pinch RF size, and responses to mechanical stimuli, and a decrease in threshold in three of the six PO neurons. In conclusion, application of the inflammatory irritant MO to the tooth pulp results in central sensitization of thalamic nociceptive neurons and this neuronal hyperexcitability likely contributes to the behavioral consequences of peripheral inflammation manifesting as pain referral, hyperalgesia and allodynia.
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Affiliation(s)
- S Zhang
- Faculty of Dentistry, University of Toronto, 124 Edward Street, Toronto, Ontario, Canada M5G 1G6
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Chiang CY, Zhang S, Xie YF, Hu JW, Dostrovsky JO, Salter MW, Sessle BJ. Endogenous ATP involvement in mustard-oil-induced central sensitization in trigeminal subnucleus caudalis (medullary dorsal horn). J Neurophysiol 2005; 94:1751-60. [PMID: 15901761 DOI: 10.1152/jn.00223.2005] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.3] [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: 11/22/2022] Open
Abstract
Central sensitization represents a sustained hypersensitive state of dorsal horn nociceptive neurons that can be evoked by peripheral inflammation or injury to nerves and tissues. It reflects neuroplastic changes such as increases in neuronal spontaneous activity, receptive field size, and responses to suprathreshold stimuli and a decrease in activation threshold. We recently demonstrated that purinergic receptor mechanisms in trigeminal subnucleus caudalis (Vc; medullary dorsal horn) are also involved in the initiation and maintenance of central sensitization in brain stem nociceptive neurons of trigeminal subnucleus oralis. The aim of the present study was to investigate whether endogenous ATP is involved in the development of central sensitization in Vc itself. The experiments were carried out on urethan/alpha-chloralose anesthetized and immobilized rats. Single neurons were recorded and identified as nociceptive-specific (NS) in the deep laminae of Vc. During continuous saline superfusion (0.6 ml/h it) over the caudal medulla, Vc neuronal central sensitization was readily induced by mustard oil application to the tooth pulp. However, this mustard-oil-induced central sensitization could be completely blocked by continuous intrathecal superfusion of the wide-spectrum P2X receptor antagonist pyridoxal-phosphate-6-azophenyl-2, 4-disulphonic acid tetra-sodium (33-100 microM) and by apyrase (an ectonucleotidase enzyme, 30 units/ml). Superfusion of the selective P2X1, P2X3 and P2X(2/3) receptor antagonist 2',3'-O-(2,4,6-trinitrophenyl) adenosine 5'-triphosphate (6-638 microM) partially blocked the Vc central sensitization. The two P2X receptor antagonists did not significantly affect the baseline nociceptive properties of the Vc neurons. These findings implicate endogenous ATP as an important mediator contributing to the development of central sensitization in nociceptive neurons of the deep laminae of the dorsal horn.
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Affiliation(s)
- C Y Chiang
- Faculty of Dentistry, University of Toronto, 124 Edward St., Toronto, ON M5G 1G6, Canada
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Xie YF, Wang J, Huo FQ, Jia H, Tang JS. Mu but not delta and kappa opioid receptor involvement in ventrolateral orbital cortex opioid-evoked antinociception in formalin test rats. Neuroscience 2004; 126:717-26. [PMID: 15183520 DOI: 10.1016/j.neuroscience.2004.04.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/15/2004] [Indexed: 10/26/2022]
Abstract
The present study was designed to investigate the roles of different subtypes of opioid receptors in ventrolateral orbital cortex (VLO) opioid-evoked antinociception in formalin test by using an automatic detection system for recording the nociceptive behavior (agitation) and a manual method for detecting the duration of licking the injected paw in the conscious rat. Formalin (5%, 50 microl) s.c. injected into the hindpaw produced a biphasic agitation response or lengthening duration of licking. Morphine (5 microg) microinjected unilaterally into VLO significantly inhibited the agitation response and the licking time, and these effects were blocked by pre-administration of the non-selective opioid receptor antagonist naloxone (1.0 microg) into the same site. Microinjection of endomorphin-1 (5 microg), a selective micro-receptor agonist, and [D-Ala2, D-Leu5]-enkephalin (DADLE, 10 microg), a delta-/micro-receptor agonist also inhibited the nociceptive behaviors, and both the effects were blocked by selective mu-receptor antagonist beta-funaltrexamine hydrochloride (beta-FNA; 3.75 microg), but the DADLE-evoked inhibition was not influenced by the selective delta-receptor antagonist naltrindole (5 microg). Microinjection of selective kappa-receptor agonist (+/-)-trans-U-50488 methanesulfonate salt (1.5 microg) failed to alter the nociceptive behaviors induced by formalin injection. The beta-FNA and naloxone applied into VLO and morphine into the adjacent regions ventral and dorsal to VLO had no effect on the formalin-evoked nociceptive behaviors. These results suggest that mu- but not delta- or kappa-opioid receptor is involved in the VLO opioid-evoked antinociception in formalin test rat.
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Affiliation(s)
- Y F Xie
- Department of Physiology, School of Medicine, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, PR China
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He YG, Xie YF, Chen Y, Qian W, Lai JH, Tan DY. [Cloning and analysis of a novel gene encoding N-terminal acetyltransferase subunit]. Sheng Wu Hua Xue Yu Sheng Wu Wu Li Xue Bao (Shanghai) 2002; 34:353-7. [PMID: 12019451] [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: 04/18/2023]
Abstract
N-terminal acetylation is the most common modification in eukaryotic proteins, affecting stability and activity of proteins. NatA is one of the N-terminal acetytransferases in yeast. It is composed of two subunits, NAT1 and ARD1. Defect in one of them leads to loss of activity of NatA. Null mutant of NAT1 in yeast exhibits a variety of phenotypes, including depression of a silent mating type locus (HML), failing to enter G(0) in poor nutrient situations and chromosomes instability. Based on homology of NAT1 between yeast and other organisms, the full-length CDS (coding sequence) of HNAT1 was cloned and sequenced. Result of in situ hybridization in testis of rat showed that expression of NAT1 was high and its expression was different in different phases of spermatogenesis. The gene may play an important role in spermatogenesis.
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Affiliation(s)
- Y G He
- Biotechnology Department, Yunnan University, Kunming 650091, China.
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Abstract
Blast, caused by the fungal pathogen Pyricularia grisea, is the most devastating disease of rice worldwide. Knowledge of the pathotype composition of the pathogen in rice fields is essential for rational deployment of resistance genes in rice breeding programs. In this study, we assayed the pathotypes of the pathogen populations using samples recently collected from 13 major rice-growing provinces of central and southern China. In all, 792 single spore isolates were tested for pathogenicity reactions using 13 host differentials consisting of six indica and seven japonica near-isogenic lines (NILs). The compositions of the pathogen populations were complex; 48 pathotypes were identified with the indica NILs, 82 pathotypes were detected with the japonica NILs, and a total of 344 pathotypes were identified with both indica and japonica NILs. There were large differences in distribution of the pathotypes among the different rice-growing areas. Even neighbor provinces seemed to differ sharply in types and frequencies of the most prevalent pathotypes. There was also a large difference in the frequencies of the isolates producing compatible reactions on the NILs, indicating the difference in frequencies of avirulence genes in the pathogen populations. The data provided very useful information for formulating strategies for improving blast resistance in rice breeding programs.
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Affiliation(s)
- H L Chen
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - B T Chen
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - D P Zhang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Y F Xie
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
| | - Qifa Zhang
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China
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24
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Xie YF, Liu JZ, Liu CY. [Effect of nucleus raphe obscurus on myoelectric activity of sphincter of Oddi in rabbits]. Sheng Li Xue Bao 2001; 53:215-8. [PMID: 12589407] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
The aim of the present study was to investigate the role of nucleus raphe obscurus (NRO) in regulating the motility of sphincter of Oddi (SO). After fasting about l8~24 h, the rabbits were anesthetized with urethane (1.0 g/kg), and the myoelectric signals of SO were induced by a pair of copper electrodes inserted into the subsera. The results of microinjection of various drugs into NRO are as follows. After glutamate (340 mmol/L, 0.1 microl) was injected, activity of SO was excited. With microinjection of GABA (1 mol/L,0.1 microl), the spike burst of SO was inhibited. Following microinjection of ketamine (180 mmol/L, 0.1 microl), a kind of N-methyl-D-aspartate (NMDA) receptor antagonist, SO motility was inhibited and the effect of glutamate was abolished. Injection of 6-cyano-7-nitroquinoxaline-2,3-dione (CNQX) (2 mmol/L, 0.1 microl), a non-NMDA receptor antagonist, also excited the myoelectric activity of SO, but did not inhibit the effect of glutamate. The effect of glutamate was abolished by intravenous injection of atropine (0.2 mg/kg) or bilateral vagotomy, but not by injection of phentolamine (1.5 mg/kg) or propronalol (1.5 mg/kg), or by transection of the spinal cord. The above results indicate that NRO mediation of SO activity is due to the effect of glutamate on the NMDA receptors in the nucleus, the output of which is sent through vagal nerve and peripheral M cholinergic receptor to exert excitation of gallbladder motility.
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Affiliation(s)
- Y F Xie
- Department of Physiology, Heze Medical College, Haze 274000
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25
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Ge TM, Zhang RD, Qin FL, Yu YJ, Xie YF. [Direct embryogenesis from protoplast of winter wheat]. Sheng Wu Gong Cheng Xue Bao 2000; 16:609-13. [PMID: 11191768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Friable embryogenic calli were obtained on a modified N6 medium (NBD medium) from a winter wheat cultivar "Jinghua No. 1" (Triticum aestivum L. cv. Jinghua No. 1) and were transferred to a modified MS liquid medium (MSDL medium) to initiate embryogenic suspension cultures. Protoplasts were isolated from the suspensions and cultured on a modified MS medium (MSDP medium). The somatic embryoids were formed directly from the protoplasts and germinated into entire plants. The development of the somatic embryoids was very similar to that of zygotic embryos of wheat.
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Affiliation(s)
- T M Ge
- Department of Horticulture, Hubei Institute for Nationalities, Enshi 445000
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26
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Chen BT, Xie YF, Zhang DP, Yu YJ. [The establishment of two new evaluation criteria for cell state of plant cell suspension cultures]. Shi Yan Sheng Wu Xue Bao 2000; 33:283-4. [PMID: 12549047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
An experiment on suspending rice cell cultures in sucrose solution and on optical density (OD) value in culture solution at 576 nm wave width was carried out, the result indicates that suspension rate (%) of suspensions, while suspending in 0.76 mol/L sucrose solution for 15 minutes at room temperature, can be employed as an judgment criterion of cell state. Suspending cell suspension in 0.76 mol/L sucrose solution is also a good approach on selecting cells from suspension cell mass, as a result, it is beneficial to establishing cell suspension. The browning of cell suspension is related to the necrosis degree of suspension cells. OD value of cell suspension liquid at 576 nm can be taken as a criterion with which the necrosis degree of cell suspension can be evaluated.
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Affiliation(s)
- B T Chen
- National Key Laboratory of Crop Genetic Improvements, Huazhong Agricultural University, Wuhan 430070
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27
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Whitten JP, Xie YF, Erickson PE, Webb TR, De Souza EB, Grigoriadis DE, McCarthy JR. Rapid microscale synthesis, a new method for lead optimization using robotics and solution phase chemistry: application to the synthesis and optimization of corticotropin-releasing factor1 receptor antagonists. J Med Chem 1996; 39:4354-7. [PMID: 8893828 DOI: 10.1021/jm960148m] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- J P Whitten
- Neurocrine Biosciences, San Diego, California 92121, USA
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28
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Chen C, Dagnino R, De Souza EB, Grigoriadis DE, Huang CQ, Kim KI, Liu Z, Moran T, Webb TR, Whitten JP, Xie YF, McCarthy JR. Design and synthesis of a series of non-peptide high-affinity human corticotropin-releasing factor1 receptor antagonists. J Med Chem 1996; 39:4358-60. [PMID: 8893829 DOI: 10.1021/jm960149e] [Citation(s) in RCA: 122] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- C Chen
- Neurocrine Biosciences, San Diego, California 92121, USA
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29
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Abstract
The effects of intrathecally administered naloxone or aminophylline on the antinociception produced by intrathecal NE, 5-HT, morphine or adenosine receptor agonist, 5'-N-ethylcarboxamidoadenosine (NECA) were observed in rats using the tail-flick test. The results show that: (1) the antinociception produced by NE with doses of 0.5 or 1.0 nmol could be completely blocked by both naloxone (240 nmol) and aminophylline (120 nmol); (2) neither naloxone (240 nmol) nor aminophylline (120 nmol) could alter the antinociception produced by 5-HT with doses of 60 or 120 nmol; and (3) the antinociception produced by morphine (0.5 nmol) could be blocked by both naloxone (240 nmol) and aminophylline (120 nmol), while the antinociception by NECA (0.5 nmol) could be blocked only by aminophylline (120 nmol), but not by naloxone (240 nmol). The results suggest that opiate-like substances (OLS) and adenosine are involved in the mediation of the NE-produced antinociception, but not in 5-HT-produced antinociception. Results also suggest that NE, OLS and adenosine may act in a sequential order in the performance of NE-induced antinociception at the spinal level.
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Affiliation(s)
- S W Yang
- Department of Neurobiology, Shanxi Medical College, Taiyuan, People's Republic of China
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30
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Abstract
The interactions between different doses of serotonin (5-HT) and norepinephrine (NE) in in vivo experiments on rat spinal cord dorsal horn cells was investigated using the integrated electromyography (EMG) measurement of the nociceptive hindlimb flexor reflex (FR). The results indicate that (1) intrathecal (IT) administration of low doses of 5-HT (60 nmol) or NE (1.5 nmol) suppresses the nociceptive FR by 40% for 20 min, respectively; (2) administration of higher doses of 5-HT (240 nmol, IT) multiplies the suppression of the nociceptive FR by 80% for 40 min, and NE (15 nmol, IT) produces similar suppression of the nociceptive FR for 80 min; (3) concomitant administration of low doses of 5-HT (60 nmol, IT) and NE (1.5 nmol, IT) produces a summation of the nociceptive FR suppression both in amplitude and duration; (4) concomitant administration of the higher doses of 5-HT (240 nmol IT) with NE (15 nmol, IT) produces similar effect obtained as 5-HT given separately, and no summation was obtained as observed following the lower dosages; (5) serotonin (240 nmol, IT) given 40 min before NE (15 nmol, IT) attenuates the duration of the suppression induced by NE; (6) pretreatment with a selective 5-HT2 receptor antagonist ketanserin (60 nmol, IT) failed to abolish the 5-HT effects; (7) pretreatment with ketanserin prior to concomitant administration of the higher doses of 5-HT and NE prolongs the time duration of the nociceptive FR suppression.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- Z H Zhang
- Department of Neurobiology, Shanxi Medical College, Taiyuan, P.R. China
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31
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Abstract
The purpose of this study was to examine whether adenosine or serotonin is involved in mediation of the antinociception produced by norepinephrine at the spinal cord level. Aminophylline, an adenosine receptor antagonist and naloxone given intrathecally (i.t.) were used to test the antinociception produced by i.t. norepinephrine, serotonin, morphine or the adenosine receptor agonist 5'-N-ethylcarboxamidoadenosine (NECA) by using the tail-flick assay in rats. It was observed that (1) aminophylline blocked the antinociception produced by norepinephrine, but exhibited no effect on the antinociception produced by serotonin, (2) aminophylline blocked the antinociception produced by morphine similarly to naloxone, (3) aminophylline blocked the antinociception produced by NECA and (4) naloxone failed to block the antinociception produced by NECA and serotonin. The results suggest that adenosine is involved in mediation of the norepinephrine-produced antinociception at the spinal level and that norepinephrine and adenosine may act in a sequential manner in norepinephrine-induced antinociception.
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Affiliation(s)
- S W Yang
- Department of Neurobiology, Shanxi Medical College, Taiyuan, P.R. China
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32
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Yang SW, Zhang ZH, Wang R, Xie YF, Qiao JT, Dafny N. Norepinephrine and serotonin-induced antinociception are blocked by naloxone with different dosages. Brain Res Bull 1994; 35:113-7. [PMID: 7953766 DOI: 10.1016/0361-9230(94)90090-6] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The effects of intrathecally (IT) administered naloxone (Nal) on the antinociception produced by IT norepinephrine (NE), serotonin (5-HT), or morphine (Mor) were observed and compared in rats using the tail-flick (TF) assay. The results show that: a) NE, 5-HT, and Mor in doses of 1 nmol, 240 nmol, and 0.5 nmol, respectively, produce similar increases in amplitude and time in TF latency (TFL); b) Nal treatment of 240 and 360 nmol has no effects on TFL; c) the antinociception produced by NE (1 nmol) can be blocked by Nal (240 nmol); d) antinociception produced by Mor (0.5 nmol) can also be blocked by Nal (240 nmol); e) 240 nmol of Nal does not affect the 5-HT (120 nmol)-produced antinociception, while 360 nmol of Nal show a delayed blockade to the 5-HT (120 nmol)-produced antinociception. The results suggest that endogenous opiate-like substances may be involved in both NE- or 5-HT-produced antinociception at the spinal level, and these effects may be mediated through different types of opiate receptors.
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Affiliation(s)
- S W Yang
- Department of Neurobiology, Shanxi Medical College, Taiyuan, P.R. China
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33
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Zhang RX, Mi ZP, Xie YF, Qiao JT. Morphological evidence for the activation of descending modulatory control by nociceptive afferent pathways: an immunocytochemical study. Brain Res 1993; 603:162-5. [PMID: 7680938 DOI: 10.1016/0006-8993(93)91316-k] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Immunocytochemical technique was used to compare the content of substance P (SP), Met-enkephalin (Met-Enk) and neurotensin (NT) on two sides of the lumbar dorsal horn of rats in which the unilateral dorsolateral funiculus was transected while formalin (0.2 ml, 5%) was injected equally into two hindpaws. The results showed that the SP-like immunoreactivity (SP-LI) and Met-Enk-LI were significantly higher and the NT-LI was significantly lower in the superficial laminae of dorsal horn on the side ipsilateral to the intact DLF than that on the opposite side, implying that peripheral noxious inputs can activate the supraspinal descending inhibitory systems which in turn modulate the transmission of noxious message at the spinal level by changing the activities of related peptidergic neurons.
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Affiliation(s)
- R X Zhang
- Department of Neurobiology, Shanxi Medical College, Taiyuan, People's Republic of China
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34
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Abstract
Immunocytochemical staining for serotonin (5-HT), tyrosine hydroxylase (TH) and galanin (GAL) was combined with horseradish peroxidase (HRP) retrograde tract-tracing technique to analyze the localizations of 5-HT-, catecholamine (CA)- and GAL-containing neurons in the brainstem which project to the nucleus parafascicularis (PF) in rats. It is demonstrated that most of the retrogradely HRP-labeled neurons (70%) in bilateral periaqueductal gray (PAG) and raphe nuclei are positively immunostained by antiserum to 5-HT, and that most of the retrogradely HRP-labeled neurons (over 80%) in bilateral locus coeruleus (LC) are positively immunostained by antisera to both TH and GAL. The possible functions of these PF-petal serotonergic, catecholaminergic (actually noradrenergic) and galaninergic projections are discussed.
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Affiliation(s)
- R X Zhang
- Department of Neurobiology, Shanxi Medical College, Taiyuan, P.R. China
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35
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Li YJ, Xie YF, Qiao JT. Effects of intrathecal monoamine antagonists and naloxone on the descending inhibition of the spinal transmission of noxious input in rats: study with a new experimental model. Brain Res 1991; 568:131-7. [PMID: 1814562 DOI: 10.1016/0006-8993(91)91388-h] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
An electrophysiological model has been developed to explore the transmitters and their relationships in the descending control of spinal transmission of noxious inputs. Nociceptive discharges were recorded extracellularly in parafascicular (Pf) neurons, and the caudal stump of longitudinally isolated dorsal half of the lower thoracic spinal cord was stimulated to simulate the descending volleys coming from the supraspinal structures. Nociceptive discharges in 34 Pf cells were markedly suppressed (83.2 +/- 13.9%) by the preceding spinal stimulation. Phentolamine, methysergide and naloxone were separately administered with random sequence in each of 25 cells by an intrathecal route to observe if the descending inhibition could be blocked by these drugs. The results suggested that in the dorsal spinal cord there exist at least two neurochemically different descending inhibitory fiber systems which comprise either the long descending adrenergic or serotonergic fibers and, most of the adrenergic fibers are succeeded by a propriospinal opioidergic neuron while a few of the serotonergic fibers have such a succession.
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Affiliation(s)
- Y J Li
- Department of Neurobiology, Shanxi Medical College, People's Republic of China
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36
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Zhang ZH, Xie YF, Qiao JT. Effects of stimulation of superior colliculus on nociceptive unit discharges in parafascicular neurons and nocifensive reflex of hind limb in rat. Brain Res 1991; 542:248-53. [PMID: 2029633 DOI: 10.1016/0006-8993(91)91574-k] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Effects of stimulation of the superior colliculus (SC) on the spontaneous and nociceptive discharges of parafascicular (PF) neurons were investigated in 43 urethane-anesthetized rats. Two groups of PF cells were sampled according to their responses to noxious stimuli: 59 of them were 'nociceptive-on' and 12 'nociceptive-off'. Following stimulation of the intermediate and deep layers of SC, the firing rate of nociceptive discharge of 'nociceptive-on' cells was inhibited significantly (-76 +/- 5%, P less than 0.01) in 75% cases tested, while the nociceptive response of 'nociceptive-off' cells was disinhibited markedly (79 +/- 9%, P less than 0.01) in 67% cases by the same stimulation. In 30 animals of this series the latency of hind limb withdrawal reflex elicited by noxious skin heating was compared before and after SC stimulation. In 24 cases in which the stimulating electrodes were positioned exactly in intermediate-deep layers of SC, SC stimulation lengthened the latency by 62 +/- 8% (P less than 0.01), while in 6 cases in which the electrodes drifted from these areas, the latency was not changed following the same stimulation.
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Affiliation(s)
- Z H Zhang
- Department of Neurobiology, Shanxi Medical College, People's Republic of China
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37
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Wang DS, Chang HY, Xie YF, Qiao JT. [Effects of stimulation of parafascicular and centromedian nuclei on nociceptive discharges of cortical somatosensory neurons in cats]. Sheng Li Xue Bao 1987; 39:39-45. [PMID: 3603062] [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: 01/06/2023]
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38
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Xie YF, Ding QR, Qiao JT. [Electrophysiological analysis of pathways connecting the periaqueductal gray and parafascicular nucleus in rats]. Sheng Li Xue Bao 1985; 37:388-94. [PMID: 3837336] [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: 01/07/2023]
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