1
|
Liu Y, Chen KL, Zhao JY, Yang CY, Jia XB, Niu YW, Tian YN, Yang Y, Liu YB. A derivative of trihydroxynaphthalenone and a pyrone metabolite from the endophytic fungus Talaromyces purpurpgenus. J Asian Nat Prod Res 2024:1-7. [PMID: 38563409 DOI: 10.1080/10286020.2024.2333359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Accepted: 03/18/2024] [Indexed: 04/04/2024]
Abstract
A newly discovered trihydroxynaphthalenone derivative, epoxynaphthalenone (1) involving the condensation of ortho-hydroxyl groups into an epoxy structure, and a novel pyrone metabolite characterized as pyroneaceacid (2), were extracted from Talaromyces purpurpgenus, an endophytic fungus residing in Rhododendron molle. The structures of these compounds were elucidated through a comprehensive analysis of their NMR and HRESIMS data. The determination of absolute configurations was accomplished using electronic circular dichroism (ECD) calculations and CD spectra. Notably, these recently identified metabolites exhibited a moderate inhibitory activity against xanthine oxidase (XOD).
Collapse
Affiliation(s)
- Yang Liu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Ke-Liang Chen
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Jing-Yi Zhao
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Chen-Yu Yang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Xing-Bao Jia
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Yu-Wei Niu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Ya-Nan Tian
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Yang Yang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Yun-Bao Liu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| |
Collapse
|
2
|
Tian YN, Li BX, Zhang H, Jin L. [Development of dental robot implantation technology]. Zhonghua Kou Qiang Yi Xue Za Zhi 2023; 58:1300-1306. [PMID: 38061874 DOI: 10.3760/cma.j.cn112144-20230908-00148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 12/23/2023]
Abstract
With the advancement of technology, intelligent technology has achieved unprecedented progress and breakthroughs in various fields. Dental implant robots represent a significant leap in the field of dental medical technology. This article aims to review the development of dental robot implantation technology both domestically and internationally, to compare the similarities and differences between existing dental implant methods and robotic implantation, to analyze the characteristics and current applications of robotic implantation technology, and to provide a forward-looking perspective. This review summarized 63 literatures and compared 1 176 implants, dental robot implantation demonstrates significant advantages in terms of precision, efficiency, and minimally invasive procedures. It effectively addresses issues such as implant position deviation, limited surgical visibility, and restricted operating space associated with traditional implantation methods. With widespread adoption in the future, it may reduce the overall technological expenses, and optimize its advantages and potential benefits.
Collapse
Affiliation(s)
- Y N Tian
- Department of Stomatology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - B X Li
- Department of Orthodontics, The Second Affiliated Hospital of Zhejiang University School of Medicine, School of Stomatology, and Key Laboratory of Oral Biomedical Research of Zhejiang Province, Hangzhou 310009, China
| | - H Zhang
- Department of Stomatology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| | - L Jin
- Department of Stomatology, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
| |
Collapse
|
3
|
Wen C, Wang Y, Yang Y, Tian YN, Wang J, Li S. Hydrazone-oxime Selectively Directed Redox-Neutral [4 + 2] Annulations Cascade with Alkynes and Iodonium Ylides to Build 1,1'-Biisoquinoline Mono- N-oxides. Org Lett 2023; 25:2616-2621. [PMID: 37042613 DOI: 10.1021/acs.orglett.3c00590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/13/2023]
Abstract
Selective C-H activation of a molecule containing multiple directing groups is an important but challenging issue in organic chemistry. Herein, a combined directing group (hydrazone-oxime) selectively directed [4 + 2] annulation cascade to synthesize novel 1,1'-biisoquinoline mono-N-oxides has been developed. Owing to the subtle differences in electronic properties between hydrazone and oxime, the first C-H annulation with alkynes preferentially occurs at the hydrazone side to form 1-oximido isoquinolines, which then undergoes a second C-H annulation with iodonium ylides at the oxime side. The two [4 + 2] annulations work smoothly under redox-neutral conditions and can be performed in one pot, without utilization of stoichiometric external oxidants. Moreover, ESI-MS and DFT calculations have been conducted to corroborate the reaction mechanism. Such novel biisoquinoline skeletons can pave the way for future research prospects with synthetic value.
Collapse
Affiliation(s)
- Chaoying Wen
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Yuqin Wang
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Yanyan Yang
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Ya-Nan Tian
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Jinhua Wang
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Shiqing Li
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| |
Collapse
|
4
|
Wang Y, Tian YN, Ren S, Zhu R, Huang B, Wen Y, Li S. Metal-free homo/cross anion-cation coupling of cyclic diaryl λ3-bromanes. Org Chem Front 2023. [DOI: 10.1039/d2qo01406h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The homo anion-cation of cyclic diaryl λ3-bromanes/diarylbrominiums, which was not reported in previous reports, has been disclosed for the first time. The competitive experiments indicates that the anion-cation coupling is...
Collapse
|
5
|
Lv S, Tian YN, Yang Y, Wen C, Li S. Rh(III)-Catalyzed One-Pot Three-Component Diannulation of Benzils, Ammonium Acetate, and Alkynes to Build 1,1′-Biisoquinolines. J Org Chem 2022; 87:16019-16025. [DOI: 10.1021/acs.joc.2c02157] [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: 11/16/2022]
Affiliation(s)
- Shihai Lv
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Ya-Nan Tian
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Yanyan Yang
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Chaoying Wen
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Shiqing Li
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| |
Collapse
|
6
|
Tian YN, Han X, Vorobyov SA, Yin JW, Liu QY, Qiao G. Wideband signal detection in multipath environment affected by impulsive noise. J Acoust Soc Am 2022; 152:445. [PMID: 35931528 DOI: 10.1121/10.0012352] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 06/20/2022] [Indexed: 06/15/2023]
Abstract
Detecting the presence or absence of a known signal is an important aspect of underwater acoustic (UWA) communications as it is a vital first step to process the received data. The influence of impulsive noise and multipath propagation on detection are both considered in this paper. Many robust detectors have been designed to cope with impulsive noise, but they tend to ignore the impact of multipath propagation, which may decrease the detection probability. To emphasize the role of multipath channel, we propose two-stage detection methods. In the first stage, the channel is estimated based on robust orthogonal matching pursuit, while in the second stage, detectors that use the channel estimation from the first stage, namely augmented log-likelihood ratio detector and augmented pseudo-correlation detector, are developed. The former detector is parametric and the latter one is non-parametric. The improved performance is demonstrated in simulated multipath channel and actual UWA channel with both simulated noise and recorded snapping shrimp noise, indicating that the proposed detectors are resistant to impulsive noise. It is also shown that the use of multipath information helps to improve the detection performance.
Collapse
Affiliation(s)
- Ya-Nan Tian
- Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
| | - Xiao Han
- Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
| | - Sergiy A Vorobyov
- Department of Signal Processing and Acoustics, Aalto University, Espoo 02150, Finland
| | - Jing-Wei Yin
- Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
| | - Qing-Yu Liu
- Naval Research Academy, Beijing 100161, China
| | - Gang Qiao
- Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
| |
Collapse
|
7
|
Huang L, Tian YN, Ren S, Wang J, Xiao Y, Zhu Q, Li S. Palladium-catalysed dual ring-opening [3 + 4] annulation of isatoic anhydrides with cyclic iodoniums to build tribenzo[b,d,f]azepines and mechanistic DFT study. Org Chem Front 2022. [DOI: 10.1039/d2qo01185a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A dual ring-opening, decarboxylative/decarbonylative [3 + 4] annulation of readily available (6-membered) isatoic anhydrides with (5-membered) cyclic iodoniums to efficiently build (7-membered) tribenzo[b,d,f]azepines through Pd(0) catalysis is disclosed. The tandem...
Collapse
|
8
|
Tian YN, Lv S, Huang L, Wen C, Yang Y, Kong X, Zhu Q, Li S. Experimental and computational study on rhodium-catalyzed C4(5) aryl−H activation/annulations of imidazoles with alkynes: Facile synthesis of six types of N-heterocycles. Org Chem Front 2022. [DOI: 10.1039/d2qo01390h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
C–H annulations at N- and C2-aryls of an imidazole have been well researched, while the annulation on C4(5)-aryls especially the reactivity and site-selectivity among these aryls remain unknown. Herein, a...
Collapse
|
9
|
Wang Y, Yu Y, Xie R, Tian YN, Huang L, Lv S, Meng X, Kong X, Li S. Cu/Fe-mediated N(sp 2)-arylation/alkenylation of pyridines with aryl-/alkenylboronic acids to yield versatile cationic materials. NEW J CHEM 2022. [DOI: 10.1039/d1nj05240c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Cu/Fe-mediated N(sp2)-arylation/alkenylation of pyridines with aryl-/alkenylboronic acids to yield length-controllable and multi-responsive pyridinium salts is disclosed.
Collapse
Affiliation(s)
- Yuzhou Wang
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Yu Yu
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Rongrong Xie
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Ya-Nan Tian
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Lingyu Huang
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Shihai Lv
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Xiaona Meng
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Xiangfei Kong
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Shiqing Li
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| |
Collapse
|
10
|
Wei JH, Tian YN, Zhang YZ, Wang XJ, Guo H, Mao JH. Short-term effect and long-term prognosis of neuroendoscopic minimally invasive surgery for hypertensive int racerebral hemorrhage. World J Clin Cases 2021; 9:8358-8365. [PMID: 34754845 PMCID: PMC8554417 DOI: 10.12998/wjcc.v9.i28.8358] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 07/02/2021] [Accepted: 08/05/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Hypertensive intracerebral hemorrhage is a common critical disease of the nervous system, comprising one fifth of all acute cerebrovascular diseases and has a high disability and mortality rate. It severely affects the patients’ quality of life.
AIM To analyze the short-term effect and long-term prognosis of neuroendoscopic minimally invasive surgery for hypertensive intracerebral hemorrhage.
METHODS From March 2018 to May 2020, 118 patients with hypertensive intracerebral hemorrhage were enrolled in our study and divided into a control group and observation group according to the surgical plan. The control group used a hard-channel minimally invasive puncture and drainage procedure. The observation group underwent minimally invasive neuroendoscopic surgery. The changes in the levels of serum P substances (SP), inflammatory factors [tumor necrosis factor-α, interleukin-6 (IL-6), IL-10], and the National Hospital Stroke Scale (NIHSS) and Barthel index scores were recorded. Surgery related indicators and prognosis were compared between the two groups.
RESULTS The operation time (105.26 ± 28.35) of the observation group was min longer than that of the control group, and the volume of intraoperative bleeding was 45.36 ± 10.17 mL more than that of the control group. The hematoma clearance rates were 88.58% ± 4.69% and 94.47% ± 4.02% higher than those of the control group at 48 h and 72 h, respectively. Good prognosis rate (86.44%) was higher in the observation group than in the control group, and complication rate (5.08%) was not significantly different from that of the control group (P > 0.05).The SP level and Barthel index score of the two groups increased (P < 0.05) and the inflammatory factors and NIHSS score decreased (P < 0.05). The cytokine levels, NIHSS score, and Barthel index score were better in the observation group than in the control group (P < 0.05).
CONCLUSION Neuroendoscopic minimally invasive surgery is more complicated than hard channel minimally invasive puncture drainage in the treatment of hypertensive intracerebral hemorrhage; however, hematoma clearance is more thorough, and the short-term effect and long-term prognosis are better than hard channel minimally invasive puncture drainage.
Collapse
Affiliation(s)
- Jian-Hui Wei
- Department of Neurosurgery, Harrison International Peace Hospital, Hengshui 053000, Hebei Province, China
| | - Ya-Nan Tian
- Department of Neurology, Harrison International Peace Hospital, Hengshui 053000, Hebei Province, China
| | - Ya-Zhao Zhang
- Department of Neurology, Harrison International Peace Hospital, Hengshui 053000, Hebei Province, China
| | - Xue-Jing Wang
- Department of Neurology, Harrison International Peace Hospital, Hengshui 053000, Hebei Province, China
| | - Hong Guo
- Department of Neurology, Harrison International Peace Hospital, Hengshui 053000, Hebei Province, China
| | - Jian-Hui Mao
- Department of Neurology, Harrison International Peace Hospital, Hengshui 053000, Hebei Province, China
| |
Collapse
|
11
|
Tian YN, Zhong RH, Wei JB, Luo HH, Eyal Y, Jin HL, Wu LJ, Liang KY, Li YM, Chen SZ, Zhang ZQ, Pang XQ. Arabidopsis CHLOROPHYLLASE 1 protects young leaves from long-term photodamage by facilitating FtsH-mediated D1 degradation in photosystem II repair. Mol Plant 2021; 14:1149-1167. [PMID: 33857689 DOI: 10.1016/j.molp.2021.04.006] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 04/01/2021] [Accepted: 04/08/2021] [Indexed: 06/12/2023]
Abstract
The proteolytic degradation of the photodamaged D1 core subunit during the photosystem II (PSII) repair cycle is well understood, but chlorophyll turnover during D1 degradation remains unclear. Here, we report that Arabidopsis thaliana CHLOROPHYLLASE 1 (CLH1) plays important roles in the PSII repair process. The abundance of CLH1 and CLH2 peaks in young leaves and is induced by high-light exposure. Seedlings of clh1 single and clh1-1/2-2 double mutants display increased photoinhibition after long-term high-light exposure, whereas seedlings overexpressing CLH1 have enhanced light tolerance compared with the wild type. CLH1 is localized in the developing chloroplasts of young leaves and associates with the PSII-dismantling complexes RCC1 and RC47, with a preference for the latter upon exposure to high light. Furthermore, degradation of damaged D1 protein is retarded in young clh1-1/2-2 leaves after 18-h high-light exposure but is rescued by the addition of recombinant CLH1 in vitro. Moreover, overexpression of CLH1 in a variegated mutant (var2-2) that lacks thylakoid protease FtsH2, with which CLH1 interacts, suppresses the variegation and restores D1 degradation. A var2-2 clh1-1/2-2 triple mutant shows more severe variegation and seedling death. Taken together, these results establish CLH1 as a long-sought chlorophyll dephytylation enzyme that is involved in PSII repair and functions in long-term adaptation of young leaves to high-light exposure by facilitating FtsH-mediated D1 degradation.
Collapse
Affiliation(s)
- Ya-Nan Tian
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, South China Agricultural University, Guangzhou 510642, People's Republic of China; College of Life Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Rui-Hao Zhong
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, South China Agricultural University, Guangzhou 510642, People's Republic of China; College of Life Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Jun-Bin Wei
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, South China Agricultural University, Guangzhou 510642, People's Republic of China; College of Life Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Hong-Hui Luo
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, South China Agricultural University, Guangzhou 510642, People's Republic of China; College of Horticulture, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Yoram Eyal
- Institute of Plant Sciences, The Volcani Center, Agricultural Research Organization, Bet Dagan 50250, Israel
| | - Hong-Lei Jin
- Institute of Medical Plant Physiology and Ecology, School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou 510006, People's Republic of China
| | - La-Jie Wu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, South China Agricultural University, Guangzhou 510642, People's Republic of China; College of Life Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Ke-Ying Liang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, South China Agricultural University, Guangzhou 510642, People's Republic of China; College of Life Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Ying-Man Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, South China Agricultural University, Guangzhou 510642, People's Republic of China; College of Life Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Shu-Zhen Chen
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, South China Agricultural University, Guangzhou 510642, People's Republic of China; College of Life Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China
| | - Zhao-Qi Zhang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, South China Agricultural University, Guangzhou 510642, People's Republic of China; College of Horticulture, South China Agricultural University, Guangzhou 510642, People's Republic of China.
| | - Xue-Qun Pang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/Guangdong Provincial Key Laboratory of Postharvest Science of Fruits and Vegetables, South China Agricultural University, Guangzhou 510642, People's Republic of China; College of Life Sciences, South China Agricultural University, Guangzhou 510642, People's Republic of China.
| |
Collapse
|
12
|
Yin JW, Zhu GJ, Han X, Ge W, Li L, Tian YN. Iterative channel estimation-based soft successive interference cancellation for multiuser underwater acoustic communications. J Acoust Soc Am 2021; 150:133. [PMID: 34340506 DOI: 10.1121/10.0005476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Accepted: 06/07/2021] [Indexed: 06/13/2023]
Abstract
This paper presents a single-carrier multiuser receiver in underwater acoustic communications with strong multiple access interference (MAI) combining passive time-reversal (PTR) and direct-adaptation-based turbo equalization. The receiver works in an iterative block by block manner. In the first iteration, when the symbols of all users are detected by successive interference cancellation (SIC) in the block, the channel impulse response (CIR) of each user is then updated by post-SIC signal to achieve more accurate MAI reconstruction and PTR combination for the next block. In the following iterations, the a priori mean of symbol in the current block is available and used to further improve the accuracy of reconstructed MAI and the updated CIR. The proposed receiver is demonstrated using experimental data collected at Songhua Lake, China, in 2019. The results show that single-carrier nine-user communication data with quadrature phase-shift keying can be successfully recovered, with an average data rate of 1.67 kbps for each user.
Collapse
Affiliation(s)
- Jing-Wei Yin
- Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
| | - Guang-Jun Zhu
- Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
| | - Xiao Han
- Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
| | - Wei Ge
- Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
| | - Lin Li
- Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
| | - Ya-Nan Tian
- Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
| |
Collapse
|
13
|
Li WB, Yang X, Tian YN, Du L. [Changes in the Bacterioplankton Community Between "Ice" and "Water" in the Frozen Dali Lake]. Huan Jing Ke Xue 2021; 42:2276-2286. [PMID: 33884797 DOI: 10.13227/j.hjkx.202009218] [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: 06/12/2023]
Abstract
Bacteria are the key components of water ecosystems, and play important roles in material and energy cycle processes. To understand the changes in the bacterioplankton community in frozen lakes, we collected 15 "bottom ice" samples and 15 "surface water" samples under the ice sheet from Dali Lake, which is an inland closed lake in the Inner Mongolia Plateau. Combined with comparisons of the physicochemical proxies between "bottom ice" and "surface water" samples, the phylum community characteristics of the bacterioplankton were analyzed in detail. Although the bacterioplankton were mainly comprised of Proteobacteria, Actinobacteria, Cyanobacteria, Bacteroidetes, and 11 other phyla in the "bottom ice" and "surface water", the average relative abundances of the dominant planktonic bacteria were clearly different. For example, the average relative abundance of Proteobacteria was approximately 63.64% in the "bottom ice" samples, but decreased to approximately 26.75% in the surface water samples, which was visibly smaller than the relative abundance of Actinobacteria with an average value of approximately 39.10%. We concluded that the changes in the contents of nutrient elements and physicochemical proxies must be the primary factors influencing the changes in the bacterioplankton community in the frozen Dali Lake. The changes in the physicochemical proxies could have been responsible for the changes in the bacteria community in the "bottom ice" and "surface water". Otherwise, the different physiological characteristics of the planktonic bacteria phyla caused the different responses to the changes in the contents of the nutrient elements and physicochemical proxies in the frozen lake. For example, the major bacterioplankton phyla were mainly influenced by the changes in total phosphorus and dissolved total phosphorus in the "bottom ice" and by the changes in dissolved inorganic phosphorus and ammonia nitrogen in the "surface water". The results will provide basic data to analyze the lake ecological environment in Northern China.
Collapse
Affiliation(s)
- Wen-Bao Li
- Inner Mongolia Key Laboratory of Water Resources Protection and Utilization, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Xu Yang
- Inner Mongolia Key Laboratory of Water Resources Protection and Utilization, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Ya-Nan Tian
- Inner Mongolia Key Laboratory of Water Resources Protection and Utilization, Inner Mongolia Agricultural University, Hohhot 010018, China
| | - Lei Du
- Inner Mongolia Key Laboratory of Water Resources Protection and Utilization, Inner Mongolia Agricultural University, Hohhot 010018, China
| |
Collapse
|
14
|
Zhu QB, Li B, Yang DD, Liu C, Feng S, Chen ML, Sun Y, Tian YN, Su X, Wang XM, Qiu S, Li QW, Li XM, Zeng HB, Cheng HM, Sun DM. A flexible ultrasensitive optoelectronic sensor array for neuromorphic vision systems. Nat Commun 2021; 12:1798. [PMID: 33741964 DOI: 10.5281/zenodo.4540948] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 02/25/2021] [Indexed: 05/23/2023] Open
Abstract
The challenges of developing neuromorphic vision systems inspired by the human eye come not only from how to recreate the flexibility, sophistication, and adaptability of animal systems, but also how to do so with computational efficiency and elegance. Similar to biological systems, these neuromorphic circuits integrate functions of image sensing, memory and processing into the device, and process continuous analog brightness signal in real-time. High-integration, flexibility and ultra-sensitivity are essential for practical artificial vision systems that attempt to emulate biological processing. Here, we present a flexible optoelectronic sensor array of 1024 pixels using a combination of carbon nanotubes and perovskite quantum dots as active materials for an efficient neuromorphic vision system. The device has an extraordinary sensitivity to light with a responsivity of 5.1 × 107 A/W and a specific detectivity of 2 × 1016 Jones, and demonstrates neuromorphic reinforcement learning by training the sensor array with a weak light pulse of 1 μW/cm2.
Collapse
Affiliation(s)
- Qian-Bing Zhu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China
- School of Material Science and Engineering, University of Science and Technology of China, Hefei, China
| | - Bo Li
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China
- School of Material Science and Engineering, University of Science and Technology of China, Hefei, China
| | - Dan-Dan Yang
- College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, China
| | - Chi Liu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China
| | - Shun Feng
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China
- School of Physical Science and Technology, ShanghaiTech University, Shanghai, China
| | - Mao-Lin Chen
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China
| | - Yun Sun
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China
| | - Ya-Nan Tian
- College of Information Science and Engineering, Northeastern University, Shenyang, China
| | - Xin Su
- School of Electronic Science and Engineering, Nanjing University, Nanjing, China
| | - Xiao-Mu Wang
- School of Electronic Science and Engineering, Nanjing University, Nanjing, China
| | - Song Qiu
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, China.
| | - Qing-Wen Li
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, China
| | - Xiao-Ming Li
- College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, China.
| | - Hai-Bo Zeng
- College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, China
| | - Hui-Ming Cheng
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China.
- School of Material Science and Engineering, University of Science and Technology of China, Hefei, China.
- Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen, China.
| | - Dong-Ming Sun
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China.
- School of Material Science and Engineering, University of Science and Technology of China, Hefei, China.
| |
Collapse
|
15
|
Zhu QB, Li B, Yang DD, Liu C, Feng S, Chen ML, Sun Y, Tian YN, Su X, Wang XM, Qiu S, Li QW, Li XM, Zeng HB, Cheng HM, Sun DM. A flexible ultrasensitive optoelectronic sensor array for neuromorphic vision systems. Nat Commun 2021; 12:1798. [PMID: 33741964 PMCID: PMC7979753 DOI: 10.1038/s41467-021-22047-w] [Citation(s) in RCA: 78] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 02/25/2021] [Indexed: 11/21/2022] Open
Abstract
The challenges of developing neuromorphic vision systems inspired by the human eye come not only from how to recreate the flexibility, sophistication, and adaptability of animal systems, but also how to do so with computational efficiency and elegance. Similar to biological systems, these neuromorphic circuits integrate functions of image sensing, memory and processing into the device, and process continuous analog brightness signal in real-time. High-integration, flexibility and ultra-sensitivity are essential for practical artificial vision systems that attempt to emulate biological processing. Here, we present a flexible optoelectronic sensor array of 1024 pixels using a combination of carbon nanotubes and perovskite quantum dots as active materials for an efficient neuromorphic vision system. The device has an extraordinary sensitivity to light with a responsivity of 5.1 × 107 A/W and a specific detectivity of 2 × 1016 Jones, and demonstrates neuromorphic reinforcement learning by training the sensor array with a weak light pulse of 1 μW/cm2. To emulate nature biological processing, highly-integrated ultra-sensitive artificial neuromorphic system is highly desirable. Here, the authors report flexible sensor array of 1024 pixels using combination of carbon nanotubes and perovskite QDs as active matetials, achieving highly responsive device for reinforcement learning.
Collapse
Affiliation(s)
- Qian-Bing Zhu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China.,School of Material Science and Engineering, University of Science and Technology of China, Hefei, China
| | - Bo Li
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China.,School of Material Science and Engineering, University of Science and Technology of China, Hefei, China
| | - Dan-Dan Yang
- College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, China
| | - Chi Liu
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China
| | - Shun Feng
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China.,School of Physical Science and Technology, ShanghaiTech University, Shanghai, China
| | - Mao-Lin Chen
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China
| | - Yun Sun
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China
| | - Ya-Nan Tian
- College of Information Science and Engineering, Northeastern University, Shenyang, China
| | - Xin Su
- School of Electronic Science and Engineering, Nanjing University, Nanjing, China
| | - Xiao-Mu Wang
- School of Electronic Science and Engineering, Nanjing University, Nanjing, China
| | - Song Qiu
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, China.
| | - Qing-Wen Li
- Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, China
| | - Xiao-Ming Li
- College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, China.
| | - Hai-Bo Zeng
- College of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing, China
| | - Hui-Ming Cheng
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China. .,School of Material Science and Engineering, University of Science and Technology of China, Hefei, China. .,Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen, China.
| | - Dong-Ming Sun
- Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China. .,School of Material Science and Engineering, University of Science and Technology of China, Hefei, China.
| |
Collapse
|
16
|
Abstract
Efficient, one-pot, and low-cost metal-catalyzed tandem Chan–Lam coupling/deprotection and Ullmann/Chan–Lam/deprotection reactions to access unsymmetrical azobenzenes are disclosed.
Collapse
Affiliation(s)
- Yuzhou Wang
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Rongrong Xie
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Lingyu Huang
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Ya-Nan Tian
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Shihai Lv
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Xiangfei Kong
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| | - Shiqing Li
- Guangxi Key Laboratory of Electrochemical and Magneto-Chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
| |
Collapse
|
17
|
Li RF, Liu SP, Yuan ZH, Yi JE, Tian YN, Wu J, Wen LX. Effects of induced stress from the live LaSota Newcastle disease vaccination on the growth performance and immune function in broiler chickens. Poult Sci 2020; 99:1896-1905. [PMID: 32241469 DOI: 10.1016/j.psj.2019.12.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
This study was conducted to assess the growth performance and immunological effects of vaccination-induced stress on broilers. The chickens were administered 0, 2, 4, 8, and 16 doses of live LaSota Newcastle disease (ND) vaccine and slaughtered on the 1st, 7th, 14th, and 21st day post vaccination. The results showed that the serum antibody titers after Newcastle disease virus (NDV) vaccination were elevated at day 7 post vaccination, peaked at day 14, then declined by day 21. Interestingly, the antibody titers peaked at 2 doses, and no further dose-dependent titer increases were observed. This study demonstrated that vaccination-induced stress increased serum adrenocorticotropic hormone and cortisol, affected growth performance (average daily gain, average daily feed intake, and feed conversion ratio), and triggered apoptosis in spleen lymphocytes by downregulating the ratio of Bcl-2 to BAX and upregulating the gene expressions of caspase-3 and -9, which was concordant with the activation of the enzymatic activities of caspase-3 and -9. This study suggests that NDV vaccine doses in broilers must be controlled judiciously because increasing the number of doses resulted in increased lymphocyte apoptosis while the peak of the antibody titer and optimal growth performance were achieved at a low number of doses (2 doses).
Collapse
Affiliation(s)
- R F Li
- College of Veterinary Medicine, Hunan Agriculture University, 410128 Changsha, China
| | - S P Liu
- College of Veterinary Medicine, Hunan Agriculture University, 410128 Changsha, China
| | - Z H Yuan
- College of Veterinary Medicine, Hunan Agriculture University, 410128 Changsha, China
| | - J E Yi
- College of Veterinary Medicine, Hunan Agriculture University, 410128 Changsha, China
| | - Y N Tian
- Department of Veterinary Physiology and Pharmacology, College of Veterinary Medicine, Texas A&M University, College Station, TX 77843
| | - J Wu
- College of Veterinary Medicine, Hunan Agriculture University, 410128 Changsha, China.
| | - L X Wen
- College of Veterinary Medicine, Hunan Agriculture University, 410128 Changsha, China.
| |
Collapse
|
18
|
Tian YN, Han X, Yin JW, Liu QY, Li L. Group sparse underwater acoustic channel estimation with impulsive noise: Simulation results based on Arctic ice cracking noise. J Acoust Soc Am 2019; 146:2482. [PMID: 31671957 DOI: 10.1121/1.5129056] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Accepted: 09/21/2019] [Indexed: 06/10/2023]
Abstract
Many underwater acoustic (UWA) channels exhibit impulsive noise, thereby severely degrading the performance of traditional channel estimation algorithms. This paper presents two channel estimation algorithms for impulsive noise, namely (i) the variable forgetting factor l1,0 recursive least sign algorithm (VFF-l1,0-RLSA) and (ii) the variable forgetting factor l2,0 recursive least sign algorithm (VFF-l2,0-RLSA), both of which exploit the group sparse multipath structure and maintain robustness under impulsive noise. By using the l1 norm of the estimation error as part of the cost function, RLSAs are better at detecting and rejecting impulsive noise than the recursive least squares algorithms. A mixed l1,0 or l2,0 norm is incorporated with a RLSA to achieve better performance in group sparse UWA channel estimation. The time-varying forgetting factor and regularization parameter in the two proposed algorithms help to improve their performance. Simulation results based on Arctic ice cracking noise demonstrate the robustness and superiority of the two proposed algorithms.
Collapse
Affiliation(s)
- Ya-Nan Tian
- Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
| | - Xiao Han
- Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
| | - Jing-Wei Yin
- Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
| | - Qing-Yu Liu
- Naval Research Academy, Beijing 100161, China
| | - Lin Li
- Acoustic Science and Technology Laboratory, Harbin Engineering University, Harbin 150001, China
| |
Collapse
|
19
|
Li GW, Xu Z, Chen QW, Chang SX, Tian YN, Fan JZ. The temporal characterization of marrow lipids and adipocytes in a rabbit model of glucocorticoid-induced osteoporosis. Skeletal Radiol 2013; 42:1235-44. [PMID: 23754734 DOI: 10.1007/s00256-013-1659-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2013] [Revised: 05/10/2013] [Accepted: 05/22/2013] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To characterize the temporal changes in marrow lipids content and adipocytes in the development of glucocorticoid-induced osteoporosis (GIOP) in rabbits using MR spectroscopy. SUBJECTS AND METHODS Twenty 20-week-old female rabbits were randomized to a control group and a GIOP group equally. Marrow lipids fraction and bone mineral density at the left proximal femur and L3-L4 vertebrae were measured by MR spectroscopy and dual-energy X-ray absorptiometry at week 0, 4, 8, and 12. Marrow adipocytes were quantitatively evaluated by histopathology. RESULTS Marrow adiposity in the GIOP group showed a significant increase over time, with a variation of marrow lipids fraction (+35.9 %) at week 4 from baseline and it was maintained until week 12 (+75.2 %, p < 0.001 for all). The GIOP group demonstrated continuous deterioration of bone with significant difference between the two groups at week 8, followed by increased marrow fat with significant difference at week 4 (p < 0.05 for all). In comparison with the controls, marrow adipocyte density in the GIOP group increased by 57.1 % at week 8 and 35.4 % at week 12, respectively. A reduction (-13.3 %) in adipocyte mean diameter at week 8 (but an increase (+22.7 %) at week 12) were observed in the GIOP group compared with the control group (p < 0.05 for all). There was significant difference between two periods (p = 0.023) in adipocyte mean diameter in the GIOP group. The percentage area of marrow adipocytes in the GIOP group was 62.8 ± 8.7 % at week 8 and 79.2 ± 7.7 % at week 12, both of which were significantly higher than those of the controls (p < 0.05 for all). CONCLUSIONS Marrow adipogenesis is synchronized with bone loss in the development of GIOP, which was characterized by a significant increase in the number of small-sized marrow adipocytes in the relatively early stage and concomitant volume increase later on. MR spectroscopy appears to be the most powerful tool for detecting the sequential changes in marrow lipid content.
Collapse
Affiliation(s)
- Guan-Wu Li
- Department of Radiology, Yueyang Hospital of Integrated Traditional Chinese & Western Medicine, Shanghai University of Traditional Chinese Medicine, No.110, Gan-he Road, Hong-kou District, Shanghai 200437, China
| | | | | | | | | | | |
Collapse
|
20
|
Li GW, Chang SX, Fan JZ, Tian YN, Xu Z, He YM. Marrow adiposity recovery after early zoledronic acid treatment of glucocorticoid-induced bone loss in rabbits assessed by magnetic resonance spectroscopy. Bone 2013; 52:668-75. [PMID: 23142803 DOI: 10.1016/j.bone.2012.11.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Revised: 10/30/2012] [Accepted: 11/01/2012] [Indexed: 11/16/2022]
Abstract
BACKGROUND Although there is an inverse relationship between bone mass and marrow adiposity, the reversal function of zoledronic acid (ZOL) on increased marrow fat has not been studied. The aim of our study is to use the 3T magnetic resonance spectroscopy (MRS) to characterize the dynamical change process of the marrow fat responding to early ZOL treatment in the rabbit model with glucocorticoid-induced bone loss. METHODS Fifteen 20-week-old female New Zealand White rabbits were randomized to control group, methylprednisolone (MPS) group, and MPS+ZOL group equally. Bone mineral density (BMD) and marrow fat fraction (FF) at L3-L4 vertebrae and left proximal femur were measured by Dual-energy X-ray absorptiometry and MRS at week 0, 4, 8, and 12. The animals were euthanized at the end of our experiment and their left femurs were dissected out for the histopathological examination. RESULTS The MPS group demonstrated a remarkable increase in FF but a reduction in BMD compared with the controls at week 4 and 8, respectively (P<0.05 for all). Early treatment of ZOL can inhibit bone degeneration, although the bone mass would not recover to its original level. FF in MPS group exhibited a dramatic increase over time, with an increased FF variation (+31.6%, P=0.009) at week 4 from baseline and it was maintained until week 12 (+75.2%, P<0.001). In MPS+ZOL group, the FF returned to baseline value after the ZOL treatment. Comparing with the controls, larger marrow adipocyte density, the mean of the adipocyte diameter, and the percentage area of the adipocyte were observed in the MPS group (P<0.05 for all), whereas there were no significant differences in quantitative parameters of marrow adipocytes between the ZOL-treated group and the normal rabbits. CONCLUSION An increase of the marrow adiposity is synchronized with the deterioration of the MPS-induced bone mass. A single dose of early ZOL can reverse the marrow adiposity to its original level completely.
Collapse
Affiliation(s)
- Guan-Wu Li
- Department of Radiology, Yueyang Hospital affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 200437, China.
| | | | | | | | | | | |
Collapse
|
21
|
Wang B, Zhu YZ, Li XQ, Tian YN, Xiong H, Chen XY. [Clinical analysis of 5 cases with acute intravascular hemolysis caused by puerarin]. Beijing Da Xue Xue Bao Yi Xue Ban 2004; 36:45-6. [PMID: 14970887] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/28/2023]
Abstract
OBJECTIVE To explore the clinical characteristics of acute intravascular hemolysis caused by puerarin so as to help our prevention, diagnosis and treatment. METHODS Analysis of 5 cases of acute intravascular hemolysis caused by puerarin was made and literature review conducted. RESULTS All patients had the history of administering puerarin, with the pre-symptoms of acute hemolysis; the clinical characteristics of acute intravascular hemolysis were observed:sudden attacks of lumber and abdominal pain, chill, fever dyspnea, temporary conciousness loss, dark urine or hematuria, low hemoglobin, high reticular red blood cell, positive of Coombs' test. CONCLUSION When sudden attacks of the above symptoms appear, the acute intravascular hemolysis should be taken into consideration first and the giving of the puerarin intravenously be immediately stopped Active and proper treatment should be made.
Collapse
Affiliation(s)
- Bo Wang
- Department of Emergency, Peking University First Hospital, Beijing 100034, China.
| | | | | | | | | | | |
Collapse
|