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Tong P, Palidan N, Song X, Tian S, Zhang L, Wu G, Deng H, Jia C, Duan R, Suo Y, Pan J, Dang Y, Kuang L, Xie J. Abortion storm of Yili horses is associated with Equus caballus papillomavirus 2 variant infection. Arch Microbiol 2023; 206:5. [PMID: 37999779 DOI: 10.1007/s00203-023-03723-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 10/07/2023] [Accepted: 10/26/2023] [Indexed: 11/25/2023]
Abstract
Nine different species of Equus caballus papillomavirus (EcPV) and three bovine papillomaviruses (BPVs) have been reported to infect horses. However, there are few descriptions of such infections in China. In our pioneer study on Chinese horses, we identified EcPV-2 in the nasal swabs (4/230, 1.7%) of Yili horses, and the semen (3/18, 16.7%) of thoroughbred horses. This indicated that EcPV is indeed hosted by horses in China, and that EcPV-2 might be transmitted though breeding. Further detection of EcPVs in the lung tissues of aborted fetuses of Yili horses, which were originally negative for equid herpes viruses, demonstrated EcPV-2 positivity in 19 of 50 samples, thereby indicating that EcPV-2 may be a new pathogen responsible for causing abortion. Thereafter, sequence analyses of the L1 genes of 26 EcPV-2 in China were performed, indicating that EcPV-2, which primarily infects horses in China, shared 98.3-99.9% nt identity with the published sequences for EcPV-2. These observations indicated that EcPV-2 identified in the current study were highly similar variants of the previously identified strains of EcPV-2. Phylogenetic analysis based on L1 gene sequences from GenBank showed that the EcPV-2 found in Chinese horses was closely related to and clustered together with an already known EcPV-2a lineage. Our study provides the first evidence related to EcPV-2 infection in Chinese horses, which can serve as a causative agent for Yili horse abortions, and may thus lay the foundation for a systematic and detailed epidemiological study of this infection in Chinese horses.
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Affiliation(s)
- Panpan Tong
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, China
| | - Nuerlan Palidan
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, China
- Vocational Technical School of Zhaosu, Zhaosu, 835600, China
| | - Xiaozhen Song
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, China
- People's Government of Ziniquanzi Town, Ziniquanzi, 831502, China
| | - Shuyao Tian
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, China
| | - Lei Zhang
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, China
- Aksu Regional Animal Disease Control and Diagnostic Center, Aksu, 843000, China
| | - Guiling Wu
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, China
- Aksu Regional Animal Disease Control and Diagnostic Center, Aksu, 843000, China
| | - Haifeng Deng
- Zhaosu Horse Barn in Yili, Zhaosu, 835602, China
| | - Chenyang Jia
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, China
| | - Ruli Duan
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, China
| | - Youtu Suo
- Zhaosu Horse Barn in Yili, Zhaosu, 835602, China
| | - Juanjuan Pan
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, China
| | - Yueyi Dang
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, China
| | - Ling Kuang
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, China.
| | - Jinxin Xie
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, 830052, China.
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Duan R, Kwan M, Kordon A, Hu C, Vanjani N, Thomas TO, Patel JD, Yadav P, Abazeed M, Gharzai LA. Stage IIIA Non-Small Cell Lung Cancer Treatment and Outcomes: A Single Institution Retrospective Analysis. Int J Radiat Oncol Biol Phys 2023; 117:e16. [PMID: 37784754 DOI: 10.1016/j.ijrobp.2023.06.681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) Treatment of locally advanced non-small cell lung cancer (NSCLC) remains challenging, with a multitude of treatment options available for Stage III patients. We hypothesized that Stage IIIA outcomes differ by treatment received. MATERIALS/METHODS We performed a retrospective review of NSCLC patients ≥18 years old with Stage IIIA disease treated 1/1/2010-03/01/2022. Demographics, treatment received, treatment outcomes, and failure patterns were collected. Progression-free survival (PFS) and overall survival (OS) were assessed using Kaplan-Meier analysis. Kruskal-Wallis ANOVA was used to compare groups. RESULTS Of 352 patients identified, 160 had Stage IIIA NSCLC with a median follow-up of 29.1 months. Patients had a median age of 63 years, 79 (49.4%) were male, and 137 (85.6%) were current/former smokers (with 30 median pack-years). Patients were treated as follows: 17 (11%) surgery alone (S), 91 (57%) definitive radiation ± chemotherapy (CRT), 52 (33%) neoadjuvant therapy followed by surgery (Neo). 6 (12%) of the Neo group received chemoimmunotherapy, and 21 (51%) of the 41 CRT patients received adjuvant immunotherapy. Between the three groups, there were no significant differences in tumor size as measured by T-staging (p = 0.83) and baseline FEV1/FVC (p = 0.92). Median PFS was 33.5mo (95% CI 13.2-NA) for group S, 18.4mo (95% CI 12.7-42.2) for CRT, and 19.7mo (95% CI 13.9-NA) for Neo with no significant intergroup difference (p = 0.72). Median OS was 33.5mo (95% CI 13.2-NA) for S, 48.7mo (95% CI 36.0-88.9) for CRT, and 50.9mo (95% CI 41.9-NA) for Neo with no significant intergroup difference (p = 0.94). Among the 17 primary surgical patients, 11 (65%) experienced failure: 6 (35%) local, 5 (29%) regional, and 7 (41%) distant. Among the 91 CRT patients, 57 (63%) experienced failure: 40 (44%) local, 35 (38%) regional, and 28 (31%) distant. Among the 52 Neo patients, 26 (50%) experienced failure: 14 (27%) local, 15 (29%) regional, and 17 (33%) distant. There were no significant differences in rates of local failure (p = 0.26), regional failure (p = 0.59), distant failure (p = 0.79), or any failure (p = 0.41) among the three treatment groups. The most common locations for distant failure were pleural effusions (n = 15, 29%), CNS (n = 14, 27%), and bone (n = 11, 21%). CONCLUSION In this single institution retrospective study, we find no significant differences in PFS, OS, and failure patterns between patients with Stage IIIA NSCLC treated with definitive (chemo)radiation and neoadjuvant therapy. Numeric improvement in PFS in surgery-only patients is consistent with expected patient selection of this group. Further work in the immunotherapy era is needed.
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Affiliation(s)
- R Duan
- Department of Radiation Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - M Kwan
- Department of Radiation Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - A Kordon
- Department of Radiation Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - C Hu
- Department of Radiation Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - N Vanjani
- Department of Radiation Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - T O Thomas
- Department of Radiation Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - J D Patel
- Lurie Cancer Center, Northwestern University-Feinberg School of Medicine, Chicago, IL
| | - P Yadav
- Department of Radiation Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - M Abazeed
- Department of Radiation Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL
| | - L A Gharzai
- Department of Radiation Oncology, Northwestern University Feinberg School of Medicine, Chicago, IL
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Si L, Qi Z, Dai J, Bai X, Mao L, Li C, Wei X, Cui CL, Chi Z, Sheng X, Kong Y, Bixia T, Zhou L, Lian B, Wang X, Duan R, Guo J. 815P A single-arm, phase II clinical study of imatinib mesylate/toripalimab combo in patients (pts) with advanced melanoma harboring c-Kit mutation or amplification. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Aguilar-Garrido P, Velasco M, Hernández Sánchez M, Navarro Aguadero MÁ, Malaney P, Aitken MJL, Zhang X, Young KH, Duan R, Hu P, Kornblau S, Fernández A, Ortiz A, Otero-Sobrino Á, de Andrés PJ, Megías D, Pérez M, Gómez J, Mata G, Martínez López J, Post S, Gallardo M. S104: RBPS DYSREGULATION CAUSE HYPER-NUCLEOLI AND RIBOSOME GAIN-OF-FUNCTION DRIVING BONE MARROW FAILURE. Hemasphere 2022. [DOI: 10.1097/01.hs9.0000843312.19737.2a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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5
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Tong P, Duan R, Palidan N, Deng H, Duan L, Ren M, Song X, Jia C, Tian S, Yang E, Kuang L, Xie J. Outbreak of neuropathogenic equid herpesvirus 1 causing abortions in Yili horses of Zhaosu, North Xinjiang, China. BMC Vet Res 2022; 18:83. [PMID: 35232435 PMCID: PMC8886757 DOI: 10.1186/s12917-022-03171-1] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 02/03/2022] [Indexed: 11/10/2022] Open
Abstract
Background EHV-1 is one of the most serious viral pathogens that frequently cause abortion in horses around the world. However, so far, relatively little information is available on EHV-1 infections as they occur in China. In January 2021, during an abortion storm which occurred in Yili horses at the Chinese State Studs of Zhaosu (North Xinjiang, China), 43 out of 800 pregnant mares aborted. Results PCR detection revealed the presence of EHV-1 in all samples as the possible cause of all abortions, although EHV-4, EHV-2 and EHV-5 were also found to circulate in the aborted fetuses. Furthermore, the partial ORF33 sequences of the 43 EHV-1 shared 99.3–100% and 99.0–100% similarity in nucleotide and amino acid sequences respectively. These sequences not only indicated a highly conserved region but also allowed the strains to group into six clusters. In addition, based on the predicted ORF30 nucleotide sequence, it was found that all the strains carried a guanine at the 2254 nucleotide position (aspartic acid at position 752 of the viral DNA polymerase) and were, therefore, identified as neuropathogenic strains. Conclusion This study is the first one that establishes EHV-1 as the cause of abortions in Yili horses, of China. Further characterization of the ORF30 sequences revealed that all the EHV-1 strains from the study carried the neuropathogenic genotype. Totally, neuropathogenic EHV-1 infection in China’s horse population should be concerned although the virus only detected in Yili horse abortions. Supplementary Information The online version contains supplementary material available at 10.1186/s12917-022-03171-1.
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Affiliation(s)
- Panpan Tong
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, Xinjiang, China
| | - Ruli Duan
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, Xinjiang, China
| | - Nuerlan Palidan
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, Xinjiang, China
| | | | - Liya Duan
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, Xinjiang, China.,Center of Animal Disease Control and Prevention, Acheng District, Harbin, Heilongjiang, China
| | - Meiling Ren
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, Xinjiang, China.,Cisen Pharmaceutical Co., Ltd, Jining, Shandong, China
| | - Xiaozhen Song
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, Xinjiang, China.,Tiankang biological Co., Ltd, Urumqi, Xinjiang, China
| | - Chenyang Jia
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, Xinjiang, China
| | - Shuyao Tian
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, Xinjiang, China
| | - Enhui Yang
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, Xinjiang, China
| | - Ling Kuang
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, Xinjiang, China.
| | - Jinxin Xie
- Laboratory of Animal Etiology and Epidemiology, College of Veterinary Medicine, Xinjiang Agricultural University, Urumqi, Xinjiang, China.
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Liu BX, Duan R, Wang HH, Zhang DY, Qin S, Luo HY, Liu J, Liang JR, Tang DM, Jing HQ, Wang J, Wang X. [Analysis on prevalence and epidemic risk of animal plague in different ecological plague foci in Inner Mongolia Autonomous Region]. Zhonghua Yu Fang Yi Xue Za Zhi 2022; 56:9-14. [PMID: 34954955 DOI: 10.3760/cma.j.cn112150-20211101-01007] [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: 06/14/2023]
Abstract
The risk of plague epidemics and relapse of various types of plague foci persists in Inner Mongolia Autonomous Region. For Marmota sibirica plague foci, the animal plague has not been found but antibody has been detected positive. Nowadays, Marmota sibirica has been increasing in population and distribution in China. In bordering countries Mongolia and Russia, the animal plague has been continuously prevalent. For Spermophilus dauricus plague foci, the animal plague has been taken place now and then. Compared to the above foci, the animal plague is most prevalent in Meriones unguiculatus plague foci and frequently spread to humans. Due to higher strain virulence and historical disaster in Marmota sibirica plague foci and Spermophilus dauricus plague foci, plague prevention and control should be strengthened on these foci. In addition to routine surveillance, epidemic dynamics need to be further monitored in these two foci, in order to prevent their relapse and spread to humans.
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Affiliation(s)
- B X Liu
- Inner Mongolia Autonomous Region Center for Synthesis Disease Control and Prevention, Hohhot 010031, China
| | - R Duan
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - H H Wang
- Inner Mongolia Autonomous Region Center for Synthesis Disease Control and Prevention, Hohhot 010031, China
| | - D Y Zhang
- Inner Mongolia Autonomous Region Center for Synthesis Disease Control and Prevention, Hohhot 010031, China
| | - S Qin
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - H Y Luo
- Hulun Buir Municipal Center for Disease Control and Prevention, Hulun Buir 021008, China
| | - J Liu
- Inner Mongolia Autonomous Region Center for Synthesis Disease Control and Prevention, Hohhot 010031, China
| | - J R Liang
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - D M Tang
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - H Q Jing
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - J Wang
- Chinese Medical Association, Beijing 100710, China
| | - X Wang
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
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7
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Li D, Wang P, Zhu WW, Zhang B, Zhang XX, Duan R, Zhang YK, Feng Y, Tang NY, Chatterjee S, Cordes JM, Cruces M, Dai S, Gajjar V, Hobbs G, Jin C, Kramer M, Lorimer DR, Miao CC, Niu CH, Niu JR, Pan ZC, Qian L, Spitler L, Werthimer D, Zhang GQ, Wang FY, Xie XY, Yue YL, Zhang L, Zhi QJ, Zhu Y. Author Correction: A bimodal burst energy distribution of a repeating fast radio burst source. Nature 2021; 601:E1. [PMID: 34912125 DOI: 10.1038/s41586-021-04178-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- D Li
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China. .,University of Chinese Academy of Sciences, Beijing, China.
| | - P Wang
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - W W Zhu
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - B Zhang
- Department of Physics and Astronomy, University of Nevada, Las Vegas, Las Vegas, NV, USA.
| | - X X Zhang
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - R Duan
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - Y K Zhang
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Y Feng
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China.,CSIRO Astronomy and Space Science, Epping, New South Wales, Australia
| | - N Y Tang
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,Department of Physics, Anhui Normal University, Wuhu, China
| | - S Chatterjee
- Cornell Center for Astrophysics and Planetary Science and Department of Astronomy, Cornell University, Ithaca, NY, USA
| | - J M Cordes
- Cornell Center for Astrophysics and Planetary Science and Department of Astronomy, Cornell University, Ithaca, NY, USA
| | - M Cruces
- Max-Planck-Institut für Radioastronomie, Bonn, Germany
| | - S Dai
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,CSIRO Astronomy and Space Science, Epping, New South Wales, Australia.,Western Sydney University, Penrith, New South Wales, Australia
| | - V Gajjar
- Department of Astronomy, University of California Berkeley, Berkeley, CA, USA
| | - G Hobbs
- CSIRO Astronomy and Space Science, Epping, New South Wales, Australia
| | - C Jin
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - M Kramer
- Max-Planck-Institut für Radioastronomie, Bonn, Germany
| | - D R Lorimer
- Department of Physics and Astronomy, West Virginia University, Morgantown, WV, USA.,Center for Gravitational Waves and Cosmology, West Virginia University, Morgantown, WV, USA
| | - C C Miao
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - C H Niu
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - J R Niu
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Z C Pan
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - L Qian
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - L Spitler
- Max-Planck-Institut für Radioastronomie, Bonn, Germany
| | - D Werthimer
- Department of Astronomy, University of California Berkeley, Berkeley, CA, USA
| | - G Q Zhang
- School of Astronomy and Space Science, Nanjing University, Nanjing, China
| | - F Y Wang
- School of Astronomy and Space Science, Nanjing University, Nanjing, China.,Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing, China
| | - X Y Xie
- Guizhou Normal University, Guiyang, China
| | - Y L Yue
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - L Zhang
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,School of Physics and Technology, Wuhan University, Wuhan, China
| | - Q J Zhi
- Guizhou Normal University, Guiyang, China.,Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guizhou Normal University, Guiyang, China
| | - Y Zhu
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
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8
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Li D, Wang P, Zhu WW, Zhang B, Zhang XX, Duan R, Zhang YK, Feng Y, Tang NY, Chatterjee S, Cordes JM, Cruces M, Dai S, Gajjar V, Hobbs G, Jin C, Kramer M, Lorimer DR, Miao CC, Niu CH, Niu JR, Pan ZC, Qian L, Spitler L, Werthimer D, Zhang GQ, Wang FY, Xie XY, Yue YL, Zhang L, Zhi QJ, Zhu Y. A bimodal burst energy distribution of a repeating fast radio burst source. Nature 2021; 598:267-271. [PMID: 34645999 DOI: 10.1038/s41586-021-03878-5] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Accepted: 08/05/2021] [Indexed: 11/09/2022]
Abstract
The event rate, energy distribution and time-domain behaviour of repeating fast radio bursts (FRBs) contain essential information regarding their physical nature and central engine, which are as yet unknown1,2. As the first precisely localized source, FRB 121102 (refs. 3-5) has been extensively observed and shows non-Poisson clustering of bursts over time and a power-law energy distribution6-8. However, the extent of the energy distribution towards the fainter end was not known. Here we report the detection of 1,652 independent bursts with a peak burst rate of 122 h-1, in 59.5 hours spanning 47 days. A peak in the isotropic equivalent energy distribution is found to be approximately 4.8 × 1037 erg at 1.25 GHz, below which the detection of bursts is suppressed. The burst energy distribution is bimodal, and well characterized by a combination of a log-normal function and a generalized Cauchy function. The large number of bursts in hour-long spans allows sensitive periodicity searches between 1 ms and 1,000 s. The non-detection of any periodicity or quasi-periodicity poses challenges for models involving a single rotating compact object. The high burst rate also implies that FRBs must be generated with a high radiative efficiency, disfavouring emission mechanisms with large energy requirements or contrived triggering conditions.
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Affiliation(s)
- D Li
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China. .,University of Chinese Academy of Sciences, Beijing, China.
| | - P Wang
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - W W Zhu
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - B Zhang
- Department of Physics and Astronomy, University of Nevada, Las Vegas, Las Vegas, NV, USA.
| | - X X Zhang
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - R Duan
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - Y K Zhang
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Y Feng
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China.,CSIRO Astronomy and Space Science, Epping, New South Wales, Australia
| | - N Y Tang
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,Department of Physics, Anhui Normal University, Wuhu, China
| | - S Chatterjee
- Cornell Center for Astrophysics and Planetary Science and Department of Astronomy, Cornell University, Ithaca, NY, USA
| | - J M Cordes
- Cornell Center for Astrophysics and Planetary Science and Department of Astronomy, Cornell University, Ithaca, NY, USA
| | - M Cruces
- Max-Planck-Institut für Radioastronomie, Bonn, Germany
| | - S Dai
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,CSIRO Astronomy and Space Science, Epping, New South Wales, Australia.,Western Sydney University, Penrith, New South Wales, Australia
| | - V Gajjar
- Department of Astronomy, University of California Berkeley, Berkeley, CA, USA
| | - G Hobbs
- CSIRO Astronomy and Space Science, Epping, New South Wales, Australia
| | - C Jin
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - M Kramer
- Max-Planck-Institut für Radioastronomie, Bonn, Germany
| | - D R Lorimer
- Department of Physics and Astronomy, West Virginia University, Morgantown, WV, USA.,Center for Gravitational Waves and Cosmology, West Virginia University, Morgantown, WV, USA
| | - C C Miao
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - C H Niu
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - J R Niu
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Z C Pan
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - L Qian
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - L Spitler
- Max-Planck-Institut für Radioastronomie, Bonn, Germany
| | - D Werthimer
- Department of Astronomy, University of California Berkeley, Berkeley, CA, USA
| | - G Q Zhang
- School of Astronomy and Space Science, Nanjing University, Nanjing, China
| | - F Y Wang
- School of Astronomy and Space Science, Nanjing University, Nanjing, China.,Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education, Nanjing, China
| | - X Y Xie
- Guizhou Normal University, Guiyang, China
| | - Y L Yue
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
| | - L Zhang
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China.,School of Physics and Technology, Wuhan University, Wuhan, China
| | - Q J Zhi
- Guizhou Normal University, Guiyang, China.,Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing, Guizhou Normal University, Guiyang, China
| | - Y Zhu
- CAS Key Laboratory of FAST, NAOC, Chinese Academy of Sciences, Beijing, China
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9
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Wang B, Duan R, Li ZB, Wang L. Circ-RPL15/miR-146b-3p/VEGFA feedback loop is responsible for triggering proliferation and migration in glioma. Eur Rev Med Pharmacol Sci 2021; 24:6204-6210. [PMID: 32572886 DOI: 10.26355/eurrev_202006_21516] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE This study aims to elucidate the role of circ-RPL15 in the progression of glioma. PATIENTS AND METHODS Circ-RPL15 levels in glioma tissues and normal brain tissues were detected. Subcellular distribution of circ-RPL15 was examined. The binding between miR-146b-3p and circ-RPL15 was verified by Luciferase assay. Potential targets of miR-146b-3p were further determined. The influences of the circ-RPL15/miR-146b-3p/VEGFA feedback loop on proliferative and migratory abilities in T98G and U251 cells were detected by cell counting kit-8 (CCK-8) and transwell assay, respectively. RESULTS Circ-RPL15 and VEGFA were upregulated in glioma tissues than normal ones, whereas miR-146b-3p was downregulated. Circ-RPL15 was mainly distributed in the cytoplasm. The interaction in the circ-RPL15/miR-146b-3p/VEGFA feedback loop was indicated by Luciferase assay, and it markedly promoted proliferative and migratory abilities in glioma. CONCLUSIONS Circ-RPL15 triggers proliferative and migratory potentials in glioma by competitively binding miR-146b-3p and thus upregulates VEGFA.
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Affiliation(s)
- B Wang
- Department of Neurosurgery, Peking University International Hospital, Beijing, China.
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10
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Bai W, Yu D, Zhu B, Yu X, Duan R, Li Y, Yu W, Hua W, Kou C. Diagnostic accuracy of computed tomography colonography in patients at high risk for colorectal cancer: a meta-analysis. Colorectal Dis 2020; 22:1528-1537. [PMID: 32277562 DOI: 10.1111/codi.15060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 03/15/2020] [Indexed: 02/08/2023]
Abstract
AIM The aim was to explore the diagnostic value of computed tomographic colonography (CTC) compared with conventional colonoscopy in individuals at high risk for colorectal cancer. METHOD PubMed, Embase, the Cochrane Library and the Web of Science were searched by two independent reviewers for potentially eligible studies published up to 31 October 2018 that were based on a per-patient analysis. stata, meta-disc and revman were used to perform this meta-analysis. A random-effect model was used, and a subgroup analysis was conducted to explore the sources of heterogeneity. RESULTS A total of 14 full-text articles, involving 3578 patients, were included in this meta-analysis. The pooled sensitivity, specificity, positive likelihood ratio, negative likelihood ratio and the area under the summary receiver operating characteristic curve of CTC for detecting polyps ≥ 6 mm were 0.87 (95% CI 0.83-0.90), 0.90 (95% CI 0.86-0.93), 9.08 (95% CI 6.28-13.13), 0.14 (95% CI 0.11-0.18) and 0.94 (95% CI 0.92-0.96), respectively. For polyps ≥ 10 mm, the pooled sensitivity, specificity, positive likelihood ratio and negative likelihood ratio of CTC were 0.91 (95% CI 0.86-0.94), 0.98 (95% CI 0.95-0.99), 40.36 (95% CI 19.16-85.03), 0.90 (95% CI 0.06-0.14) and 0.98 (95% CI 0.96-0.99), respectively. CONCLUSION In this meta-analysis, CTC had high diagnostic accuracy for detecting polyps ≥ 6 mm and ≥ 10 mm in patients at high risk of developing colorectal cancer and it had a higher sensitivity and specificity for detecting polyps ≥ 10 mm than polyps ≥ 6 mm. However, the results should be used cautiously due to the significant heterogeneity.
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Affiliation(s)
- W Bai
- Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, China
| | - D Yu
- Department of Surgical Oncology, Fifth People's Hospital of Shenyang, Shenyang, China
| | - B Zhu
- Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, China
| | - X Yu
- Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, China
| | - R Duan
- Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, China
| | - Y Li
- Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, China
| | - W Yu
- Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, China
| | - W Hua
- Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, China
| | - C Kou
- Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun, China
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11
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He ZK, Wang J, Sun H, Su J, Liu X, Gu WP, Yu DS, Luo LZ, Wang ML, Hu B, Hu WF, Tong J, Yang M, Wang SL, Wang CX, Wang YL, Zhan ZF, Duan R, Qin S, Jing HQ, Wang X. [Characteristics and diversity of infectious diarrheal caused by various pathogens]. Zhonghua Liu Xing Bing Xue Za Zhi 2020; 41:1328-1334. [PMID: 32867445 DOI: 10.3760/cma.j.cn112338-20200213-00093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To understand the characteristics and differences of diarrhea-related symptoms caused by different pathogens, and the clinical features of various pathogens causing diarrhea. Methods: Etiology surveillance program was conducted among 20 provinces of China from 2010 to 2016. The acute diarrhea outpatients were collected from clinics or hospitals. A questionnaire was used to survey demographics and clinical features. VFeces samples were taken for laboratory detection of 22 common diarrhea pathogens, to detect and analyze the clinical symptom pattern characteristics of the patient's. Results: A total of 38 950 outpatients were enrolled from 20 provinces of China. The positive rates of Rotavirus and Norovirus were the highest among the five diarrhea-causing viruses (Rotavirus: 18.29%, Norovirus: 13.06%). In the isolation and culture of 17 diarrhea-causing bacterial, Escherichia coli showed the highest positive rates (6.25%). The clinical features of bacterial diarrhea and viral diarrhea were mainly reflected in the results of fecal traits and routine examination, but pathogenic Vibrio infection was similar to viral diarrhea. Conclusion: Infectious diarrhea presents different characteristics due to various symptoms which can provide a basis for clinical diagnosis.
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Affiliation(s)
- Z K He
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - J Wang
- Dongcheng District Center for Disease Control and Prevention, Beijing 100009, China
| | - H Sun
- Dongcheng District Center for Disease Control and Prevention, Beijing 100009, China
| | - J Su
- Henan Center for Disease Control and Prevention, Zhengzhou 450016, China
| | - X Liu
- Ningxia Center for Disease Control and Prevention, Yinchuan 750004, China
| | - W P Gu
- Yunnan Center for Disease Control and Prevention, Kunming 650022, China
| | - D S Yu
- Gansu Provincial Center for Disease Control and Prevention, Lanzhou 730000, China
| | - L Z Luo
- Sichuan Center for Disease Control and Prevention, Chengdu 610041, China
| | - M L Wang
- Guangxi Zhuang Autonomous Region Center for Disease Control and Prevention, Nanning 530028, China
| | - B Hu
- Shandong Center for Disease Control & Prevention, Jinan 250014, China
| | - W F Hu
- Anhui Provincial Center for Disease Control and Prevention, Hefei 230601, China
| | - J Tong
- Xuzhou Municipal Center for Disease Control and Prevention, Xuzhou 221006, China
| | - M Yang
- Jiangxi Province Center for Disease Control and Prevention, Nanchang 330029, China
| | - S L Wang
- Hainan Center for Disease Control and Prevention, Haikou 570203, China
| | - C X Wang
- Qing Hai Center for Diseases Prevention & Control, Xining 810000, China
| | - Y L Wang
- Tianjin Jizhou District Center for Disease Control and Prevention, Tianjin 301999, China
| | - Z F Zhan
- Hunan Provincial Center for Disease Control and Prevention, Changsha 410000, China
| | - R Duan
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - S Qin
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - H Q Jing
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - X Wang
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
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12
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Zhou Z, Chen Z, Cao H, Duan R, Li J, Cai S, Grasemann H, Philip K, Zabner J, Welsh M, Ianowski J, Hu J. WS17.1 Enhancing site-specific gene integration efficiency for permanent CFTR gene correction. J Cyst Fibros 2020. [DOI: 10.1016/s1569-1993(20)30256-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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13
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Wang X, Chen ZH, Ran L, Duan R, Qin S, Wang H, Zeng M, Zhu FC, Bao CC, Wang L, Liang WL, Li FQ, Qing ZT, Chun H, Jing HQ. [Interpretation for diagnosis of Yersiniosis]. Zhonghua Liu Xing Bing Xue Za Zhi 2019; 40:1048-1051. [PMID: 31594143 DOI: 10.3760/cma.j.issn.0254-6450.2019.09.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Yersiniosis is one of the "other infectious diarrhea" of the notifiable infectious diseases and also an important food-borne disease. However, it lacked the basis or standard for diagnosis. The Chinese Preventive Medicine Association coordinated experienced researchers from National Institute for Communicable Disease Control and Prevention, China CDC and other institutes to produce the group standard entitled "Diagnosis of Yersiniosis" (T/CPMA 005-2019). Based on the principle of "legality, scientificity, advancement, and feasibility" , the standard gives a clear definition for Yerisiniosis, stipulates diagnosis basis, principles and main differential diagnosis and provides two informative appendixes for epidemiological and clinical characteristics and a normative appendix for laboratory detection. The standard provides accurate basis and methods of Yersiniosis diagnosis for hospitals and CDCs at all levels in China. It will solve the problems that Yersiniosis cannot be clearly diagnosed for clinical cases and in the outbreaks.
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Affiliation(s)
- X Wang
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Z H Chen
- Beijing Ditan Hospital, Capital Medical University, Beijing 100015, China
| | - L Ran
- Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - R Duan
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - S Qin
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - H Wang
- Peking University People's Hospital, Beijing 100044, China
| | - M Zeng
- National Institute for Food and Drug Control, Beijing 102629, China
| | - F C Zhu
- Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - C C Bao
- Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - L Wang
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - W L Liang
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - F Q Li
- China National Center for Food Safety Risk Assessment, Beijing 100022, China
| | - Z T Qing
- Zhengzhou Engineering Research Center for Foodborne Pathogens Rapid Detection Reagents, Zhengzhou 450000, China
| | - H Chun
- Subei Mongolian Autonomous County Center for Disease Control and Prevention, Jiuquan 736300, China
| | - H Q Jing
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
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14
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Meng ZQ, Duan R, Bu G, Guo GX, Guo LZ, Hu YK. [Epidemiological and pathogenic features of a bacillary dysentery outbreak in a boarding school caused by Shigella sonneri]. Zhonghua Liu Xing Bing Xue Za Zhi 2019; 40:988-991. [PMID: 31484266 DOI: 10.3760/cma.j.issn.0254-6450.2019.08.021] [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: 06/10/2023]
Abstract
Objective: To investigate the etiologic and epidemiologic features of an infectious diarrhea outbreak in a boarding school in Fuyang city, Anhui province. Methods: Traceability hypothesis of this study was tested according to the epidemiological characteristics of the cases. Feces, anal swabs, water samples and food residues related to the patients and chefs were collected for pathogen isolation and detection. Biochemical identification, virulence gene detection, drug susceptibility test, PFGE and multilocus sequence typing were performed. Results: The incidence rate (3.41%) of different dormitory buildings within the water supply area by shallow wells was higher than that (0.98%) of the deep wells, with statistical significance (χ(2)=17.215, P<0.001). Sixteen strains belonged to the Shigella Sonneri family were isolated from the patient's samples, and all carrying the ipaH gene. Seven strains belonged to sen and ial genes. Set1 gene that did not appear in all the 16 strains were highly resistant to ampicillin, tetracycline, compound xinnomine, cefazoline, cefotaxime, gentamicin, naphthidinic acid and streptomycin, including 9 strains to doxycycline. The pulse field pattern of the 16 strains of Shigella sonneri appeared the same, with the ST type as ST152. Conclusion: When combined data from the etiological and epidemiological investigation, it was confirmed that Shigella sonneri was the pathogen of this outbreak, and water from the shallow wells might be responsible for the source of infection.
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Affiliation(s)
- Z Q Meng
- Fuyang Municipal Center for Disease Control and Prevention of Anhui Province, Fuyang 236000, China
| | - R Duan
- National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - G Bu
- Fuyang Municipal Center for Disease Control and Prevention of Anhui Province, Fuyang 236000, China
| | - G X Guo
- Fuyang Municipal Center for Disease Control and Prevention of Anhui Province, Fuyang 236000, China
| | - L Z Guo
- Fuyang Municipal Center for Disease Control and Prevention of Anhui Province, Fuyang 236000, China
| | - Y K Hu
- Fuyang Municipal Center for Disease Control and Prevention of Anhui Province, Fuyang 236000, China
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15
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Duan R, van Dijk LA, Barbieri D, de Groot F, Yuan H, de Bruijn JD. Accelerated bone formation by biphasic calcium phosphate with a novel sub-micron surface topography. Eur Cell Mater 2019; 37:60-73. [PMID: 30687909 DOI: 10.22203/ecm.v037a05] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [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: 01/31/2023] Open
Abstract
Osteoinductive calcium phosphate (CaP) bone grafts have equivalent performance to autografts in repairing critical-size bone defects. The osteoinductive potential of CaP is linked to the size of the surface topographical features. In the present study, two novel biphasic calcium phosphate (BCP) bone grafts were synthesised with either sub-micron- (BCP<µm) or micron-scale (BCPµm) needle-shaped surface topography and compared to dimensionally similar tricalcium phosphate (TCP) with grain-shaped surface structures (TCP<µm and TCPµm). To clarify the possible function of the surface morphology (needle-like vs. grain-like) in initiating bone formation, the four CaP test materials were physicochemically characterised and implanted for 12 weeks in the dorsal muscle of beagles. The sub-micron needle-shaped topography of BCP<µm triggered earlier bone formation (3-6 weeks) as compared to the grain-shaped surface topography of TCP<µm, which formed bone at 6-9 weeks. After 12 weeks, the amount of induced bone formation in both materials was equivalent, based on histomorphometry. The micron-sized needle-shaped surface topography of BCPµm led to limited formation of new bone tissue, whereas its counterpart, TCPµm with grain-shaped surface topography, failed to trigger de novo bone formation. The relative strength of the parameters affecting CaP-driven bone induction was as follows: surface feature size > surface feature morphology > substrate chemistry. BCP materials with needle-shaped sub-micron surface topography gave rise to accelerated bone formation and slower rate of resorption than a comparable TCP. These characteristics may be translated to improve bone healing in orthotopic defects.
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Affiliation(s)
| | | | | | | | | | - J D de Bruijn
- Bronkhorstlaan 10, building 48, 3723 MB Bilthoven, the
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16
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Li Q, Qiu B, Xie W, Hui Z, Wang B, Liang Y, Guo J, Zhou Y, Zhu M, Shen W, Duan R, Chen L, Zhang L, Long H, Liu H. P2.14-004 Comparable Local Controls after Twice-Daily and Once-Daily Chest Radiotherapy in Extensive Stage Small Cell Lung Cancer. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Li K, Wang R, Duan R, Liu Y. THE POTENTIAL OF DIETHYLHEXYL-PHTHALATE AND GENISTEIN TO INDUCE TESTICULAR CHANGES IN RAT'S OFFSPRING. Acta Endocrinol (Buchar) 2017; 13:417-424. [PMID: 31149210 PMCID: PMC6516560 DOI: 10.4183/aeb.2017.417] [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] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To study the effect of diethylhexyl phthalate (DEHP) alone or in combination with genistein (GEN) on the reproductive system of offspring rats, focus on the induction of reproductive outcomes. METHOD 180 Wistar rats were divided in 6 groups (30 animals per group): DEHP 250 mg/kg/day group, DEHP 1000 mg/kg/day group, DEHP 2500 mg/kg/day group treated with DEHP 2500 mg/kg/day, DEHP (2500 mg/kg) + GEN (50 mg/kg) group, DEHP (2500 mg/kg) + GEN (500 mg/kg) group and control group treated with the same quantity of corn oil. The differences in sperm quality and reproductive organs were observed. RESULTS After DEHP administration we observed an increase in rat's abestrus, metaestrus and all estrus cycle (P < 0.05), a decrease in rat testicle's organ coefficient and relative energy of testis Sertoli cells and an increase in the early, late and total apoptotic rate of testicular Sertoli cells in a dose dependent manner (P < 0.05). When combine DEHP with GEN the sperm density, sperm quality, the cell activity rate and testis tissue's changes will decrease compared with the group that receive only DEHP in a dose dependent manner. CONCLUSION DEHP exposure induces cryptorchidism in offspring rats and this is aggravated by adding GEN.
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Affiliation(s)
- K. Li
- The Affiliated Hospital of Hebei University of Engineering, Department of Urology, Hebei, China
| | - R. Wang
- The Affiliated Hospital of Hebei University of Engineering, Operation Room, Hebei, China
| | - R. Duan
- The Affiliated Hospital of Hebei University of Engineering, Department of Physiology, Handan, Hebei, China
| | - Y. Liu
- The Affiliated Hospital of Hebei University of Engineering, Department of Physiology, Handan, Hebei, China
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18
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Du MZ, Duan R, Shao DC, Zhang XY, Zhang F, Li H. [Antinociceptive efficacy of QO-58 in the monosodium lodoacetate rat model for osteoarthritis pain]. Zhonghua Yi Xue Za Zhi 2017; 97:1333-1336. [PMID: 28482437 DOI: 10.3760/cma.j.issn.0376-2491.2017.17.013] [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: 06/07/2023]
Abstract
Objective: To determine the effects of QO-58 on pain behavior associated with monosodium iodoacetate (MIA)-induced OA. Methods: The OA model was established with an intra-articular injection of 3 mg/50 MIA through the right patellar ligament. Then the model rats were treated with 50 mg/kg QO-58 by intraperitoneal injection, and pain-related behaviors were assessed by single administration and multiple administrations of QO-58. Results: Single adminstration of QO-58 increased the mechanical threshold and prolonged the withdrawal latency of OA pain with the antinociceptive effect occurring at 6 h and 10 h. Compound QO-58 was administered intraperitoneally once a day from day 10 to 14. QO-58 significantly increased the mechanical threshold and prolonged the withdrawal latency of OA rats at 12 and 14 days. Conclusion: QO-58 showed antinociceptive effects for OA pain in the MIA model after pain development. QO-58 may be an alternative therapeutic treatment for OA.
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Affiliation(s)
- M Z Du
- Department of Biochemistry and Molecular Biology, Key Laboratory of Neural and Vascular Biology of Ministry of Education, Hebei Medical University, Shijiazhuang 050017, China
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Peyrot M, Ivanova J, Zao C, Schmerold L, King S, Birnbaum HG, DeLozier AM, Hadjiyianni I, Kabul S, Cao D, Duan R, Perez-Nieves M. Reasons for different patterns of basal insulin persistence after initiation among people with type 2 diabetes (T2D). DIABETOL STOFFWECHS 2017. [DOI: 10.1055/s-0037-1601705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- M Peyrot
- Loyola University Maryland, Sociology, Baltimore, United States
| | - J Ivanova
- Analysis Group, Inc., New York, United States
| | - C Zao
- Analysis Group, Inc., New York, United States
| | - L Schmerold
- Analysis Group, Inc., New York, United States
| | - S King
- Analysis Group, Inc., Boston, United States
| | | | - AM DeLozier
- Eli Lilly and Company, Indianapolis, United States
| | | | - S Kabul
- Eli Lilly and Company, Indianapolis, United States
| | - D Cao
- Eli Lilly and Company, Indianapolis, United States
| | - R Duan
- Eli Lilly and Company, Indianapolis, United States
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Guan J, Shen S, Wu H, Liu X, Shen W, He Y, Duan R. Biomass and terpenoids produced by mutant strains of Arthrospira under low temperature and light conditions. World J Microbiol Biotechnol 2017; 33:33. [DOI: 10.1007/s11274-016-2199-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Accepted: 12/23/2016] [Indexed: 01/26/2023]
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21
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Fan X, Ding WJ, Wang G, Zhang C, Chen N, Han HL, Wu JH, Duan R, Wang HF, Fan XJ, Wu W. [PM2.5 and polluted gas exposure induced acute injury in rats'larynx membrane]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2016; 30:1876-1880. [PMID: 29798017 DOI: 10.13201/j.issn.1001-1781.2016.23.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 08/17/2016] [Indexed: 11/12/2022]
Abstract
Objective:To study acute injury of rat's larynx membrane which were exposured to PM2.5 and polluted gas in serious air pollution. Method:Rats were divided into 3 groups of 5 animals each, the normal control group, gas exposured group, PM2.5 +gas exposured group. The control group served as the normal healthy control, rats of the gas exposured group had been exposured polluted gas in the A cabin, rats of PM2.5 +gas exposured group had been exposured PM2.5 and polluted gas in the B cabin. The total exposure time was six days. We collected specimen from 3 groups immediately after exposure. Histopathological changes in the rat's larynx membrane were assessed using hematoxylin and eosin staining(HE), the expression of IL-1β in laryngeal mucous membrane were assessed using immunohistochemical staining(IHC), and the ultrastructure changes were observed under TEM. Result:HE staining showed the rat's laryngeal mucosa cells in the normal control group had no obvious abnormalities, laryngeal mucosa of rats in the two experimental group had different degrees of cell proliferation, cell polarity change, etc. IHC staining showed that there's no obvious expression of IL-1β in laryngeal mucous membrane in the normal control group, and positive expression in the two experimental group. TEM showed the control group had no obvious abnormalities, the laryngeal mucosa cells in the two groups of experimental groups had been found irregular nucleus and damaged mitochondria. Conclusion:Exposed to PM2.5 and polluted gas in severe atmospheric pollution 6 days, the acute damage in rats laryngeal mucosa can be observed.
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Affiliation(s)
- X Fan
- PLA 306th Hospital/Peking University Teaching Hospital,Beijing,100101,China
| | - W J Ding
- College of Life Sciences, University of Chinese Academy of Sciences
| | - G Wang
- Department of Otolaryngology Head and Neck Surgery,PLA 306th Hospital
| | - C Zhang
- PLA 306th Hospital/Peking University Teaching Hospital,Beijing,100101,China
| | - N Chen
- PLA 306th Hospital/Peking University Teaching Hospital,Beijing,100101,China
| | - H L Han
- Department of Otolaryngology Head and Neck Surgery,PLA 306th Hospital
| | - J H Wu
- Department of Pathology, PLA 306th Hospital, Beijing
| | - R Duan
- Department of Pathology, PLA 306th Hospital, Beijing
| | - H F Wang
- Department of Pathology, PLA 306th Hospital, Beijing
| | - X J Fan
- Department of Pathology, PLA 306th Hospital, Beijing
| | - W Wu
- PLA 306th Hospital/Peking University Teaching Hospital,Beijing,100101,China
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22
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Li B, Duan R, Li J, Huang Y, Yin H, Lin CH, Wei D, Shen X, Liu J, Chen Q. Experimental studies of thermal environment and contaminant transport in a commercial aircraft cabin with gaspers on. Indoor Air 2016; 26:806-19. [PMID: 26547623 DOI: 10.1111/ina.12265] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [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: 06/10/2015] [Accepted: 10/31/2015] [Indexed: 05/22/2023]
Abstract
Gaspers installed in commercial airliner cabins are used to improve passengers' thermal comfort. To understand the impact of gasper airflow on the air quality in a cabin, this investigation measured the distributions of air velocity, air temperature, and gaseous contaminant concentration in five rows of the economy-class section of an MD-82 commercial aircraft. The gaseous contaminant was simulated using SF6 as a tracer gas with the source located at the mouth of a seated manikin close to the aisle. Two-fifths of the gaspers next to the aisle were turned on in the cabin, and each of them supplied air at a flow rate of 0.66 l/s. The airflow rate in the economy-class cabin was controlled at 10 l/s per passenger. Data obtained in a previous study of the cabin with all gaspers turned off were used for comparison. The results show that the jets from the gaspers had a substantial impact on the air velocity and contaminant transport in the cabin. The air velocity in the cabin was higher, and the air temperature slightly more uniform, when the gaspers were on than when they were off, but turning on the gaspers may not have improved the air quality.
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Affiliation(s)
- B Li
- Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, China
| | - R Duan
- Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, China
| | - J Li
- Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, China
| | - Y Huang
- Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, China
| | - H Yin
- Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, China
| | - C-H Lin
- The Boeing Company, Seattle, USA
| | - D Wei
- Boeing Research & Technology-China, Beijing, China
| | - X Shen
- Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, China.
| | - J Liu
- Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, China
| | - Q Chen
- Tianjin Key Laboratory of Indoor Air Environmental Quality Control, School of Environmental Science and Engineering, Tianjin University, Tianjin, China
- School of Mechanical Engineering, Purdue University, West Lafayette, IN, USA
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Bai LY, Zeng XB, Su SM, Duan R, Wang YN, Gao X. Heavy metal accumulation and source analysis in greenhouse soils of Wuwei District, Gansu Province, China. Environ Sci Pollut Res Int 2015; 22:5359-69. [PMID: 25430008 DOI: 10.1007/s11356-014-3763-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Accepted: 10/21/2014] [Indexed: 05/06/2023]
Abstract
Greenhouse soils and arable (wheat field) soil samples were collected to identify the effects of greenhouse cultivation on the accumulation of six heavy metals (Cd, Cu, Zn, Pb, Cr, and Ni) and to evaluate the likely sources responsible for heavy metal accumulation in the irrigated desert soils of Wuwei District, China. The results indicated that the mean concentrations of Cd, Cu, Zn, Pb, Cr, and Ni were 0.421, 33.85, 85.31, 20.76, 53.12, and 28.59 mg kg(-1), respectively. The concentrations of Cd, Cu, and Zn in greenhouse soils were 60, 23, and 14% higher than those in arable soils and 263, 40, and 25% higher than background concentrations of natural soils in the study area, respectively. These results indicated that Cd, Cu, and Zn accumulation occurred in the greenhouse soils, and Cd was the most problematically accumulated heavy metal, followed by Cu and Zn. There was a significant positive correlation between the concentrations of Cd, Cu, and Zn in greenhouse soils and the number of years under cultivation (P < 0.05). Greenhouse cultivation had little impact on the accumulation of Cr, Ni, or Pb. Correlation analysis and principal component analysis suggested that the accumulation of Cd, Cu, and Zn in greenhouse soils resulted mainly from fertilizer applications. Our results indicated that the excessive and long-term use of fertilizers and livestock manures with high heavy metal levels leads to the accumulation of heavy metals in soils. Therefore, rational fertilization programs and reductions in the concentrations of heavy metals in both fertilizers and manure must be recommended to maintain a safe concentration of heavy metals in greenhouse soils.
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Affiliation(s)
- L Y Bai
- Key Laboratory of Agro-Environment, the Ministry of Agriculture of China, Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Science, No. 12 Zhongguncun South Street, Beijing, 100081, People's Republic of China
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25
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Duan R, Liu Y, Xue H, Yang M, Cheng G. Cross-Sectional Association between Overall Diet Quality and Body Composition among Children and Adolescents in South China. J Acad Nutr Diet 2014. [DOI: 10.1016/j.jand.2014.06.344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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26
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Su XH, Duan R, Sun YY, Wen JF, Kang DG, Lee HS, Cho KW, Jin SN. Cardiovascular effects of ethanol extract of Rubus chingii Hu (Rosaceae) in rats: an in vivo and in vitro approach. J Physiol Pharmacol 2014; 65:417-424. [PMID: 24930514] [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] [Received: 01/03/2014] [Accepted: 03/25/2014] [Indexed: 06/03/2023]
Abstract
Rubus chingii Hu (Rosaceae) is an important traditional Chinese medicine that has been used to improve function of the kidney and treat excessive polyuria. However, the effects of Rubus chingii on the cardiovascular system and its pharmacological mechanisms of action have not been studied. The aim of the present study was to evaluate the cardiovascular effects of ethanol extract of Rubus chingii (ERC) in rats. The changes in systolic blood pressure and heart rate of rats and vascular tone of aortic rings in in vitro were measured using pressure transducer and force transducer, respectively, connected to a multichannel recording system. ERC decreased systolic blood pressure and heart rate in a concentration-dependent manner. ERC induced vasorelaxation in a concentration-dependent manner. The ERC-induced vasorelaxation was not observed in the absence of the endothelium. The vasorelaxant effect of ERC was significantly attenuated by inhibition of endothelial NO synthase (eNOS), soluble guanylyl cyclase (sGC), or Ca(2+) entry from extracellular sources with L-NAME, ODQ, diltiazem, or extracellular Ca(2+) depletion, respectively. Similarly, an inhibition of Akt with wortmannin attenuated the ERC-induced vasorelaxation. Modulators of the store-operated Ca(2+) entry, thapsigargin, Gd(3+), and 2-aminoethyl diphenylborinate markedly attenuated the ERC-induced vasorelaxation. Furthermore, 4-aminopyridine an inhibitor of voltage-dependent K(+) (KV) channel, significantly attenuated the ERC-induced vasorelaxation. However, tetraethylammonium and glibenclamide, had no significant effect on the ERC-induced vasorelaxation. Indomethacin, atropine, and propranolol had no effects on the ERC-induced vasorelaxation. The present study demonstrates that ERC induces vasorelaxation via endothelium-dependent two-step signaling: an activation of the Ca(2+)-eNOS-NO signaling in the endothelial cells and then subsequent stimulation of the NO-sGC-cGMP-KV channel signaling in the vascular smooth muscle cells. The Akt-eNOS pathway is also suggested to be involved in this relaxation. Also, the findings suggest that the ERC-induced vasorelaxation is closely related to the hypotensive action of the agent.
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Affiliation(s)
- X H Su
- School of Pharmacy, Taishan Medical University, Taian, Shandong, China.
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27
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Luo S, Huang W, Chen C, Pan Q, Duan R, Wu L. A novel deletion to normal size in the sperm of a fragile X full mutation male. Clin Genet 2013; 86:295-7. [PMID: 24635531 DOI: 10.1111/cge.12287] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Revised: 09/21/2013] [Accepted: 09/23/2013] [Indexed: 11/30/2022]
Affiliation(s)
- S Luo
- State Key Laboratory of Medical Genetics Xiangya School of Medicine, Central South University Changsha, 410078, Hunan, China
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28
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Khosropour CM, Duan R, Metsch LR, Feaster DJ, Golden MR. O02.4 Persistent/Recurrent Chlamydial Infection Among STD Clinic Patients Treated with CDC-Recommended Therapies. Sex Transm Infect 2013. [DOI: 10.1136/sextrans-2013-051184.0092] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Ke J, Duan R. Effects of flavonoids from semen cuscutae on the hippocampal-hypothalamic-pituitary-ovarian sex hormone receptors in female rats exposed to psychological stress. CLIN EXP OBSTET GYN 2013; 40:271-274. [PMID: 23971257] [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: 06/02/2023]
Abstract
OBJECTIVE To investigate the effects of flavonoids from semen cuscutae (FSCs) on the hippocampal-hypothalamic-pituitary-ovarian sex hormone receptors in female rats exposed to psychological stress and to explore the related mechanism. MATERIALS AND METHODS Flavonoids were obtained from semen cuscutae using solvent extraction and polyamide column chromatography. Sound, light, and electricity were combined into psychological stress for endocrine dysfunction model establishment in female rats. The effects of FSCs on estrogen receptor (ER) in the hippocampus, hypothalamus, and pituitaries, as well as on follicle-stimulating hormone receptor (FSHR) and luteinizing hormone receptor (LHR) in the ovaries of the psychologically stressed rats were quantitatively analyzed using immunohistochemistry and image analysis. RESULTS FSCs increased ER expression in the hippocampus, hypothalamus, and pituitaries, as well as LHR expression in the ovaries, but had no effect on FSHR expression in the ovaries. CONCLUSION FSCs are an effective medicine in the treatment of ovarian endocrine dysfunction in psychologically stressed rats.
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Affiliation(s)
- J Ke
- Children's Hospital of Jiangxi Province, Nanchang, China.
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30
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Su SM, Zeng XB, Li LF, Duan R, Bai LY, Li AG, Wang J, Jiang S. Arsenate reduction and methylation in the cells of Trichoderma asperellum SM-12F1, Penicillium janthinellum SM-12F4, and Fusarium oxysporum CZ-8F1 investigated with X-ray absorption near edge structure. J Hazard Mater 2012; 243:364-7. [PMID: 23122191 DOI: 10.1016/j.jhazmat.2012.09.061] [Citation(s) in RCA: 9] [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] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 09/12/2012] [Accepted: 09/26/2012] [Indexed: 05/26/2023]
Abstract
Synchrotron radiation-based X-ray absorption near edge structure (XANES) was introduced to directly analysis chemical species of arsenic (As) in the cells of Trichoderma asperellum SM-12F1, Penicillium janthinellum SM-12F4, and Fusarium oxysporum CZ-8F1 capable of As accumulation and volatilisation. After exposure to As(V) of 500 mg L(-1) for 15 days, a total of 60.5% and 65.3% of the accumulated As in the cells of T. asperellum SM-12F1 and P. janthinellum SM-12F4, respectively, was As(III), followed by 31.3% and 32.4% DMA (dimethylarsinic acid), 8.3% and 2.3% MMA (monomethylarsonic acid), respectively. However, for F. oxysporum CZ-8F1, 54.5% of the accumulated As was As(III), followed by 37.8% MMA and 7.7% As(V). The reduction and methylation of As(V) formed As(III), MMA, and DMA as the primacy products, and the reduction of As(V) might be more easily processed than the methylation. These results will help to understanding the mechanisms of As detoxification and its future application in bioremediation.
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Affiliation(s)
- S M Su
- Institute of Environment and Sustainable Development in Agriculture, Chinese Academy of Agricultural Sciences/Key Laboratory of Agro-Environment, Ministry of Agriculture, Beijing, PR China.
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31
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Zheng KYZ, Choi RCY, Cheung AWH, Guo AJY, Bi CWC, Zhu KY, Fu Q, Du Y, Zhang WL, Zhan JYX, Duan R, Lau DTW, Dong TTX, Tsim KWK. Flavonoids from Radix Astragali induce the expression of erythropoietin in cultured cells: a signaling mediated via the accumulation of hypoxia-inducible factor-1α. J Agric Food Chem 2011; 59:1697-1704. [PMID: 21309574 DOI: 10.1021/jf104018u] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Radix Astragali (RA) is commonly used as a health food supplement to reinforce the body vital energy. Flavonoids, including formononetin, ononin, calycosin, and calycosin-7-O-β-d-glucoside, are considered to be the major active ingredients within RA. Here, we provided different lines of evidence that the RA flavonoids stimulated the expression of erythropoietin (EPO), the central regulator of red blood cell mass, in cultured human embryonic kidney fibroblasts (HEK293T). A plasmid containing hypoxia response element (HRE), a critical regulator for EPO transcription, was tagged upstream of a firefly luciferase gene, namely, pHRE-Luc, which was being transfected into fibroblasts. The application of RA flavonoids onto the transfected cells induced the transcriptional activity of HRE. To account for the transcriptional activation after the treatment of flavonoids, the expression of hypoxia-inducible factor-1α (HIF-1α) was markedly increased: The increase was in both mRNA and protein levels. In addition, the degradation of HIF-1α was reduced under the effect of flavonoids. The regulation of HIF-1α therefore could account for the activation of EPO expression mediated by the RA flavonoids. The current results therefore reveal the function of this herb in enhancing hematopoietic functions.
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Affiliation(s)
- Ken Y Z Zheng
- Section of Marine Ecology and Biotechnology, Division of Life Science and Center for Chinese Medicine, The Hong Kong University of Science and Technology, Clear Water Bay Road, Hong Kong, China
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Abstract
MicroRNAs (miRNAs) are small non-coding RNAs that inhibit expression of specific target genes at the posttranscriptional level. MiRNAs are often found to be misregulated in human cancer, and they can act as either potent oncogenes or tumour suppressor genes. Here we show that a germline mutation in mature miR-125a is highly associated with breast cancer tumorigenesis, suggesting that miR-125a is likely to function as a tumour suppressor gene in human cancer.
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Affiliation(s)
- W Li
- Department of Human Genetics, Emory University School of Medicine, Atlanta, Georgia 30322, USA
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Erlanson-Albertsson C, Duan R, Rippe C, Berger K. Influence of diabetes on intestinal fat digestion. Exp Clin Endocrinol Diabetes 2009. [DOI: 10.1055/s-0029-1211874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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34
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Jones JE, Wang L, Kropf PL, Duan R, Johnson DE. Src family kinase gene targets during myeloid differentiation: identification of the EGR-1 gene as a direct target. Leukemia 2009; 23:1933-5. [PMID: 19494839 DOI: 10.1038/leu.2009.118] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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35
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Baum MK, Rafie C, Sales S, Lai S, Duan R, Jayaweera DT, Page JB, Campa A. C-reactive protein: a poor marker of cardiovascular disease risk in HIV+ populations with a high prevalence of elevated serum transaminases. Int J STD AIDS 2008; 19:410-3. [PMID: 18595880 DOI: 10.1258/ijsa.2007.007207] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Blood lipids and high-sensitivity C-reactive protein (hsCRP) are used to assess cardiovascular disease (CVD) risk. We evaluated in a cross-sectional design the relationship of hsCRP to markers of liver function (aspartate and alanine transaminases [AST and ALT, respectively]), CVD risk factors and HIV-disease progression markers in 226 HIV-1 sero-positive drug users. hsCRP showed a significant inverse relationship with ALT and high-density lipoprotein, independent of age, gender, viral load, CD4 cell-count and antiretroviral (ARV) use, and was not significantly associated with HIV-disease progression markers. Serum markers of liver damage, AST and ALT, were associated with lower hsCRP, total cholesterol, low-density lipoproteins and triglycerides. Elevated liver enzymes (> or =40 IU/L) were predictive of hsCRP levels that are considered a low risk for CVD. In conclusion, hsCRP may not be a reliable marker of CVD risk in populations with HIV at-risk for elevated liver enzymes due to high hepatitis B virus/hepatitis C virus prevalence and ARV use.
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Affiliation(s)
- M K Baum
- Robert R Stempel School of Public Health, Florida International University, Miami, FL 33199, USA.
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Duan R, van Dun JM, Remeijer L, Siemerink M, Mulder PGH, Norberg P, Osterhaus ADME, Verjans GMGM. Prevalence of herpes simplex virus type 1 glycoprotein G (gG) and gI genotypes in patients with herpetic keratitis. Br J Ophthalmol 2008; 92:1195-200. [PMID: 18617539 DOI: 10.1136/bjo.2007.136044] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
AIM Recent phylogenetic analyses on the herpes simplex virus type 1 (HSV-1) genes US4, encoding glycoprotein G (gG) and US7, encoding gI, of clinical HSV-1 isolates have led to the classification of HSV-1 into three genotypes, arbitrarily designated as A, B and C. The prevalence of the HSV-1 gG and gI genotypes and their potential disease association was determined in a large cohort of patients with herpetic keratitis (HK). METHODS Primary corneal HSV-1 isolates of 178 HK patients were genotyped by a PCR-based restriction fragment length polymorphism method targeting the viral genes US4 and US7. RESULTS Genotype B was more frequently expressed by the corneal HSV-1 isolates compared with genotypes A and C. Fifty-five of 178 corneal isolates (31%) had different genotypes in both loci. No clinically relevant associations were observed between the HSV-1 genotypes and disease outcome in the HK patients studied. CONCLUSIONS The data presented demonstrate a high frequency of recombinant corneal HSV-1 isolates and suggest that clinical outcome of HSV-1-induced keratitis is independent of a gG or gI genotype.
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Affiliation(s)
- R Duan
- Department of Virology, Erasmus Medical Center, Rotterdam, The Netherlands
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Miranda MB, Duan R, Thomas SM, Grandis JR, Redner RL, Jones JE, Johnson DE. Gefitinib potentiates myeloid cell differentiation by ATRA. Leukemia 2008; 22:1624-7. [PMID: 18305561 DOI: 10.1038/leu.2008.28] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Abstract
Experimental autoimmune myasthenia gravis (EAMG) is an animal model for human myasthenia gravis (MG), characterized by an autoaggressive T-cell-dependent antibody-mediated immune response directed against the acetylcholine receptor (AChR) of the neuromuscular junction. Dendritic cells (DC) are unique antigen-presenting cells which control T- and B-cell functions and induce immunity or tolerance. Here, we demonstrate that DC exposed to TGF-beta1 in vitro mediate protection against EAMG. Freshly prepared DC from spleen of healthy rats were exposed to TGF-beta1 in vitro for 48 h, and administered subcutaneously to Lewis rats (2 x 10(6)DC/rat) on day 5 post immunization with AChR in Freund's complete adjuvant. Control EAMG rats were injected in parallel with untreated DC (naive DC) or PBS. Lewis rats receiving TGF-beta1-exposed DC developed very mild symptoms of EAMG without loss of body weight compared with control EAMG rats receiving naive DC or PBS. This effect of TGF-beta1-exposed DC was associated with augmented spontaneous and AChR-induced proliferation, IFN-gamma and NO production, and decreased levels of anti-AChR antibody-secreting cells. Autologous DC exposed in vitro to TGF-beta1 could represent a new opportunity for DC-based immunotherapy of antibody-mediated autoimmune diseases.
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Affiliation(s)
- D Yarilin
- Experimental Neurology and Neuroimmunology Units, Division of Neurology, Karolinska Institute, Huddinge University Hospital, Stockholm, Sweden
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Wankell M, Kaesler S, Zhang YQ, Florence C, Werner S, Duan R. The activin binding proteins follistatin and follistatin-related protein are differentially regulated in vitro and during cutaneous wound repair. J Endocrinol 2001; 171:385-95. [PMID: 11739004 DOI: 10.1677/joe.0.1710385] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Follistatin is a secreted protein that binds activin in vitro and in vivo and thereby inhibits its biological functions. Recently, related human and murine genes, designated follistatin-related gene (FLRG), were identified, and their products were shown to bind activin with high affinity. In this study we further characterized the murine FLRG protein, and we analyzed its tissue-specific expression and regulation in comparison with those of follistatin. Transient expression of the mouse FLRG protein in COS-1 cells revealed that the FLRG cDNA encodes a secreted glycoprotein. FLRG mRNA was expressed at high levels in the lung, the testis, the uterus and, particularly, the skin. Immunohistochemistry revealed the presence of FLRG in the basement membrane between the dermis and the epidermis and around blood vessels. FLRG mRNA expression was induced in keratinocytes by keratinocyte growth factor, epidermal growth factor and transforming growth factor-beta 1, and in fibroblasts by platelet-derived growth factor and epidermal growth factor. The induction was more rapid, but weaker, than that of follistatin. Most interestingly, both follistatin and FLRG were expressed during the wound healing process, but their distribution within the wound was different. The different expression pattern of FLRG and follistatin and their differential regulation suggest different functions of these activin-binding proteins in vivo.
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Affiliation(s)
- M Wankell
- Institute of Cell Biology, ETH Zürich, Hönggerberg, HPM D42, CH-8093 Zürich, Switzerland
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Duan R, Liu TC, Li Y, Guo H, Yao LB. Signal transduction pathways involved in low intensity He-Ne laser-induced respiratory burst in bovine neutrophils: a potential mechanism of low intensity laser biostimulation. Lasers Surg Med 2001; 29:174-8. [PMID: 11553907 DOI: 10.1002/lsm.1106] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.7] [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: 11/10/2022]
Abstract
BACKGROUND AND OBJECTIVE Low intensity He-Ne laser irradiation has been reported to induce respiratory burst of neutrophils for a long time, but the mechanism remains obscure. We speculated that it is mediated by some signal transduction pathways. STUDY DESIGN/MATERIALS AND METHODS The protein tyrosine kinases (PTKs) inhibitor, genistein, the phospholipase C (PLC) inhibitor, U-73122, and the protein kinase C (PKC) inhibitor, calphostin C, were used to probe signal transduction pathways of respiratory burst of bovine neutrophils which were induced by He-Ne laser at a dose of 300 J/m(2), respectively. RESULTS The inhibitor of PTKs can completely inhibit the He-Ne laser-induced respiratory burst of neutrophils. PLC and PKC inhibitors can obviously reduce it, but not fully inhibit it. CONCLUSION These results suggest that PTKs play a key role in the He-Ne laser-induced respiratory burst of neutrophils and [PTK-PLC-PKC-NADPH oxidase] signal transduction pathways may be involved in this process.
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Affiliation(s)
- R Duan
- Laboratory of Light Transmission Optics, South China Normal University, Guangzhou, GD 510631, China
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Connolly K, Cho YH, Duan R, Fikes J, Gregorio T, LaFleur DW, Okoye Z, Salcedo TW, Santiago G, Ullrich S, Wei P, Windle K, Wong E, Yao XT, Zhang YQ, Zheng G, Moore PA. In vivo inhibition of Fas ligand-mediated killing by TR6, a Fas ligand decoy receptor. J Pharmacol Exp Ther 2001; 298:25-33. [PMID: 11408521] [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: 02/20/2023] Open
Abstract
TR6, a member of the tumor necrosis factor (TNF) receptor superfamily, has recently been shown to bind to Fas ligand (FasL) and inhibit FasL-mediated cell killing in vitro. In the current study, we demonstrate that TR6 can block the lethal activity of FasL in multiple in vitro systems, and extend this finding to an in vivo model of hepatitis. The binding of human TR6 to human FasL was verified with BIAcore chip technology. Human primary hepatocytes, HT-29 cells and Jurkat cells were assayed for viability to demonstrate TR6 inhibition of FasL-mediated cytotoxicity in vitro. Human TR6 was also shown to cross-react with membrane-bound mouse FasL, since the in vitro cytotoxic activity of L929 cells transfected with murine FasL was inhibited in the presence of human TR6. In vivo, FasL-induced acute, lethal, fulminant hepatic apoptosis resulting in death within 2 h of intravenous injection into Fas+ mice, but not Fas- MRL/lpr mice. Pretreatment of mice with TR6 blocked FasL-induced mortality, presumably by attenuating FasL-induced hepatic apoptosis. Thus, in both in vitro and in vivo systems, TR6 acts as a functional FasL decoy receptor and may be clinically useful in the treatment of hepatitis and other diseases associated with FasL-mediated tissue injury.
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Affiliation(s)
- K Connolly
- Human Genome Sciences Inc., Rockville, Maryland 20850, USA.
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Abstract
Adenosine deaminase (ADA) regulates cellular levels of adenosine and deoxyadenosine, and 17beta-estradiol (E(2)) induces ADA mRNA in MCF-7 human breast cancer cells. IGF-I also induces ADA gene expression in these cells, and induction of this response through IGF activation of estrogen receptor alpha (ERalpha) was further investigated. IGF and other polypeptide growth factors induce reporter gene expression in MCF-7 cells cotransfected with ERalpha expression plasmid and pADA211, a construct containing the -211 to +11 region of the ADA gene promoter which is required for high basal and E(2)-inducible activity. Deletion analysis of this promoter demonstrates that IGF activates ERalpha/Sp1 interactions with multiple GC-rich sites in the promoter and this response is abrogated in cells transfected with ERalpha containing mutations at Ser(118) or Ser(163). IGF induces both MAPK (mitogen-activated protein kinase) and PI3-K (phosphatidylinositol-3-kinase) phosphorylation cascades in MCF-7 cells; however, using a series of inhibitors and dominant negative constructs, our results show that induction of ADA by IGF activation of ERalpha/Sp1 is dependent on the MAPK signaling pathway.
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Affiliation(s)
- W Xie
- Department of Veterinary Physiology & Pharmacology, Texas A&M University, 4466 TAMU, College Station, Texas 77843-4466, USA
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Duan R, Xie W, Burghardt RC, Safe S. Estrogen receptor-mediated activation of the serum response element in MCF-7 cells through MAPK-dependent phosphorylation of Elk-1. J Biol Chem 2001; 276:11590-8. [PMID: 11145955 DOI: 10.1074/jbc.m005492200] [Citation(s) in RCA: 117] [Impact Index Per Article: 5.1] [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] [Indexed: 11/06/2022] Open
Abstract
17beta-Estradiol (E2) induces c-fos protooncogene expression in MCF-7 human breast cancer cells, and deletion analysis of the c-fos promoter showed that the serum response element (SRE) at -325 to -296 was E2-responsive. The mechanism of ligand-activated estrogen receptor alpha (ERalpha)-dependent activation of gene expression through the SRE was determined by mutational analysis of the promoter, analysis of mitogen-activated protein kinase (MAPK) pathway activation by E2, and transforming growth factor alpha (TGF-alpha) as a positive control. In addition, ERalpha-negative MDA-MB-231 breast cancer and Chinese hamster ovary cells were used as reference cell lines. The results showed that transcriptional activation of the SRE by E2 was due to ERalpha activation of the MAPK pathway and increased binding of the serum response factor and Elk-1 to the SRE. Subsequent studies with dominant negative Elk-1, wild type, and variant GAL4-Elk-1 fusion proteins confirmed that phosphorylation of Elk-1 at serines 383 and 389 in the C-terminal region of Elk-1 is an important downstream target associated with activation of an SRE by E2. Both E2 (ERalpha-dependent) and growth factors (ERalpha-independent) activated the SRE in breast cancer cells via the Ras/MAPK pathway; however, in ER-negative CHO cells that do not express a receptor for TGF-alpha, only hormone-induced activation was observed in cells transfected with ERalpha.
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Affiliation(s)
- R Duan
- Department of Veterinary Physiology and Pharmacology, Texas A & M University, College Station, Texas 77843-4466, USA
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Porter W, Wang F, Duan R, Qin C, Castro-Rivera E, Kim K, Safe S. Transcriptional activation of heat shock protein 27 gene expression by 17beta-estradiol and modulation by antiestrogens and aryl hydrocarbon receptor agonists. J Mol Endocrinol 2001; 26:31-42. [PMID: 11174852 DOI: 10.1677/jme.0.0260031] [Citation(s) in RCA: 52] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Heat shock protein 27 (Hsp 27) is expressed in mammary tumors and may play a role in tumor growth and response to anti-neoplastic drug therapy. 17beta-Estradiol (E2) induces Hsp 27 mRNA levels in MCF-7 human breast cancer cells, and we have investigated the comparative inhibitory mechanisms using the aryl hydrocarbon receptor (AhR) agonist, 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) and the direct-acting antiestrogen ICI 164,384. TCDD inhibited E2-induced Hsp 27 gene expression and analysis of the Hsp 27 gene promoter showed that the inhibitory response was associated with AhR interactions with a pentanucleotide motif at -3 to +2 in the promoter that corresponded to the core sequence of a dioxin responsive element. In contrast, ICI 164,384 induced Hsp 27 gene expression and reporter gene activity in MCF-7 cells and this represents one of the few examples of the estrogen receptor-alpha (ERalpha) agonist activity of the 'pure' antiestrogen ICI 164,384.
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Affiliation(s)
- W Porter
- Department of Veterinary Physiology and Pharmacology, Texas A&M University, College Station, Texas 77843-4466, USA
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Abstract
Thymidylate synthase (TS) catalyzes methylation of deoxyuridine phosphate to give deoxythymidine phosphate, and 17beta-estradiol (E2) induces TS gene expression in MCF-7 human breast cancer cells. Analysis of the TS gene promoter showed that E2-responsiveness required the -229 to -140 promoter region containing a G-rich sequence and CACCC box. Subsequent mutational analysis of this region indicated that only the G-rich motif (-150 to -142) was required for E2 action. Results of gel mobility shift and in vitro DNA footprinting assays showed that both estrogen receptor alpha (ERalpha) and Sp1 proteins were required for hormone-induced trans-activation that involved ERalpha/Sp1 binding to the G-rich site in which only Sp1 protein bound DNA. Both proteins also interacted in Drosophila cells in functional assays, confirming the transcriptional activation of TS-involved ERalpha/Sp1, and this adds to the increasing number of genes that are activated through this pathway in breast cancer cells.
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Affiliation(s)
- W Xie
- Department of Veterinary Physiology and Pharmacology, Texas A&M University, College Station 77843-4466, USA
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Abstract
Insulin-like growth factor-I (IGF-I), transforming growth factor alpha (TGFalpha) and epidermal growth factor (EGF) induced cathepsin D gene expression and reporter gene activity in MCF-7 human breast cancer cells transiently transfected with a construct (pCD1) containing a -2576 to -124 cathepsin D gene promoter insert. In contrast, IGF-I, but not TGFalpha or EGF, induced reporter gene activity in cells cotransfected with wild-type estrogen receptor (ER) expression plasmid and a construct (pCD2) containing estrogen-responsive downstream elements from -208 to -101. Promoter deletion and mutational analysis experiments identified four GC-rich sites and an imperfect palindromic estrogen responsive element required for IGF-I activation of the ER (ligand-independent). Subsequent studies with the mitogen-activated protein kinase (MAPK) inhibitor, PD98059, and a serine(118(-ER mutant confirmed the role of the MAPK pathway for IGF-I activation of the ER in MCF-7 cells. Thus, growth factor activation of ER can mediate transactivation vs ER/Sp1 binding to GC-rich sites and represents a novel pathway for ligand-independent ER action. The divergent pathways for IGF-I and TGFalpha/EGF activation of the ER observed in MCF-7 cells contrast with previous data indicating that pathways for growth factor activation of the ER are dependent on the gene and/or gene promoter and on cell context.
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Affiliation(s)
- F Wang
- Department of Veterinary Physiology, Texas A & M University, College Station, Texas 77843-4466, USA
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Duan R, Porter W, Samudio I, Vyhlidal C, Kladde M, Safe S. Transcriptional activation of c-fos protooncogene by 17beta-estradiol: mechanism of aryl hydrocarbon receptor-mediated inhibition. Mol Endocrinol 1999; 13:1511-21. [PMID: 10478842 DOI: 10.1210/mend.13.9.0338] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [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: 11/19/2022] Open
Abstract
17Beta-estradiol (E2) induced c-fos protooncogene mRNA levels in MCF-7 human breast cancer cells, and maximal induction was observed within 1 h after treatment. 2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) inhibited the E2-induced response within 2 h. The molecular mechanism of this response was further investigated using pFC2-CAT, a construct containing a -1400 to +41 sequence from the human c-fos protooncogene linked to a bacterial chloramphenicol acetyltransferase (CAT) reporter gene. In MCF-7 cells transiently transfected with pFC2-CAT, 10 nM E2 induced an 8.5-fold increase of CAT activity, and cotreatment with 10 nM TCDD decreased this response by more than 45%. Alpha-Naphthoflavone, an aryl hydrocarbon receptor (AhR) antagonist, blocked the inhibitory effects of TCDD; moreover, the inhibitory response was not observed in variant Ah-nonresponsive MCF-7 cells, suggesting that the AhR complex was required for estrogen receptor cross-talk. The E2-responsive sequence (-1220 to -1155) in the c-fos gene promoter contains two putative core pentanucleotide dioxin-responsive elements (DREs) at -1206 to -1202 and -1163 to -1159. In transient transfection assays using wild-type and core DRE mutant constructs, the downstream core DRE (at -1163 to -1159) was identified as a functional inhibitory DRE. The results of photo-induced cross-linking, gel mobility shift, and in vitro DNA footprinting assays showed that the AhR complex interacted with the core DRE that also overlapped the E2-responsive GC-rich site (-1168 to -1161), suggesting that the mechanism for AhR-mediated inhibitory effects may be due to quenching or masking at the Sp1-binding site.
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Affiliation(s)
- R Duan
- Department of Veterinary Physiology and Pharmacology, Texas A&M University, College Station 77843-4466, USA
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Duan R. Transcriptional Activation of c-fos Protooncogene by 17 -Estradiol: Mechanism of Aryl Hydrocarbon Receptor-Mediated Inhibition. Mol Endocrinol 1999. [DOI: 10.1210/me.13.9.1511] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Zhao L, Wei JH, Yan GD, Chen WJ, Duan R, Ren W. [Effect of extremely low frequency magnetic field on brain response to selective mental arithmetic under simulated weightlessness]. Space Med Med Eng (Beijing) 1999; 12:161-4. [PMID: 11766706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
Objective. To study effects of extremely low frequency magnetic field (ELMF) on brain function state during weightlessness. Method. The brain event-related potentials (ERPs) during a selective mental arithmetic task were compared in 40 normal subjects (20-25 yrs) before and after ELMF (5 Hz) stimulation during simulated weightlessness (head down tilt -10 degrees, HDT). Result. The amplitude of slow positive potentials which were supposed to be related to the mental arithmetic activity decreased significantly especially in 100 min after HDT, but it did not decrease significantly after ELMF stimulation. Conclusion. ELMF stimulation may improve the brain function state during simulated weightlessness.
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Affiliation(s)
- L Zhao
- Institute of Space Medico-Engineering, Beijing 100094, China
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Abstract
Adenosine deaminase (ADA) gene expression is induced by 17beta-estradiol (E2) in MCF-7 human breast cancer cells, whereas the antiestrogens 4'-hydroxytamoxifen and ICI 182,780 exhibit partial estrogen receptor (ER) agonist/antagonist and antagonist activities, respectively. Previous studies have shown that the -211 to +11 region of the ADA gene promoter contains six GC-rich sites (I-VI) that bind Sp1 protein, and these elements are required for high basal expression. In transient transfection studies with pADA211, which contains the -211 to +11 ADA gene promoter linked to a bacterial chloramphenicol acetyl transferase (CAT) reporter gene, E2 and tamoxifen (but not ICI 182,780) induced CAT activity. Ligand-induced transactivation was observed only in cells cotransfected with expression plasmids for wild-type ER or HE11, which does not contain the DNA-binding domain of the ER. Cotransfection with HE15 and HE19, which contain the DNA-binding domain and activation function-1 (AF-1) and AF-2 of the ER, respectively, did not result in E2-induced activity. Subsequent deletion analysis of the ADA gene promoter showed that Sp1 binding site IV (-79 to -73) was primarily responsible for hormone responsiveness. ER activation of ADA gene expression is another example of an E2-induced gene that is dependent on ER/Sp1 interactions with a site-specific GC-rich motif.
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Affiliation(s)
- W Xie
- Department of Veterinary Physiology and Pharmacology, Texas A&M University, College Station 77843-4466, USA
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