1
|
Ashish S, Kalluraya P, Pai M, Murlimanju B, Rao Y, Prabhu L, Agrawal A. Morphometric study of the lumbar vertebrae in dried anatomical collections. F1000Res 2023; 11:1408. [PMID: 37990689 PMCID: PMC10660310 DOI: 10.12688/f1000research.126879.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 12/29/2023] [Indexed: 11/23/2023] Open
Abstract
Background The objective of this anatomical study was to perform the morphometry of dried lumbar vertebrae in human cadavers. Methods This study utilized 200 adult human cadaveric dried lumbar vertebrae. The digital Vernier calipers was used to perform the measurements. The height, antero-posterior length, transverse length of the body of the vertebrae, interpedicular distance at the lateral ends, lamina length, height and thickness, superior and inferior articular facet height and width, mid sagittal and transverse diameter of vertebral foramen, height, width and thickness of the pars inter-articularis were measured. Results The vertebral body's anteroposterior length was more at the lower border than at the superior border ( p < 0.01). The length of lamina was higher over the right in comparison to the left (p < 0.001). The height of lamina, width of inferior articular facet, diameter of lateral recess and thickness of pars inter-articularis were greater for the left sided specimens ( p < 0.01). The statistical significance was not observed for the comparison of the remaining parameters ( p > 0.05). Conclusion This anatomical study offered several dimensions of lumbar vertebrae, which are essential in the surgical practice. The implants at the lumbar vertebrae need to be manufactured based on the anatomical dimensions of that particular sample population.
Collapse
Affiliation(s)
- Sharad Ashish
- Department of Anatomy, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India
| | - P. Kalluraya
- Department of Anatomy, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India
| | - Mangala Pai
- Department of Anatomy, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India
| | - B.V. Murlimanju
- Department of Anatomy, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India
| | - Y. Rao
- Department of Anatomy, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India
| | - Latha Prabhu
- Department of Anatomy, Kasturba Medical College, Mangalore, Manipal Academy of Higher Education, Manipal, India
| | - Amit Agrawal
- Department of Neurosurgery, All India Institute of Medical Sciences, Bhopal, Madhya Pradesh, 462020, India
| |
Collapse
|
2
|
Gu Z, Wang K, Rao Y, Nan P, Cheng L, Ge B, Zhang W, Ma C. Atomic-Resolution Electron Microscopy Unravelling the Role of Unusual Asymmetric Twin Boundaries in the Electron-Beam-Sensitive NASICON-Type Solid Electrolyte. Nano Lett 2023; 23:11818-11826. [PMID: 38078871 DOI: 10.1021/acs.nanolett.3c03852] [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: 12/28/2023]
Abstract
An atomic-scale understanding of the role of nonperiodic features is essential to the rational design of highly Li-ion-conductive solid electrolytes. Unfortunately, most solid electrolytes are easily damaged by the intense electron beam needed for atomic-resolution electron microscopy observation, so the reported in-depth atomic-scale studies are limited to Li0.33La0.56TiO3- and Li7La3Zr2O12-based materials. Here, we observe on an atomic scale a third type of solid electrolyte, Li1.3Al0.3Ti1.7(PO4)3 (LATP), through minimization of damage induced by specimen preparation. With this capability, LATP is found to contain large amounts of twin boundaries with an unusual asymmetric atomic configuration. On the basis of the experimentally determined structure, the theoretical calculations suggest that such asymmetric twin boundaries may considerably promote Li-ion transport. This discovery identifies a new entry point for optimizing ionic conductivity, and the method presented here will also greatly benefit the mechanistic study of solid electrolytes.
Collapse
Affiliation(s)
- Zhenqi Gu
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Kai Wang
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China
- School of Materials & Energy, Lanzhou University, Lanzhou, Gansu 730000, China
| | - Yifei Rao
- CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Pengfei Nan
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Institutes of Physical Science and Information Technology, Anhui University, Hefei, Anhui 230601, China
| | - Lixun Cheng
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Institutes of Physical Science and Information Technology, Anhui University, Hefei, Anhui 230601, China
| | - Binghui Ge
- Information Materials and Intelligent Sensing Laboratory of Anhui Province, Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education, Institutes of Physical Science and Information Technology, Anhui University, Hefei, Anhui 230601, China
| | - Wenhua Zhang
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Cheng Ma
- Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China
- CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026, China
- National Synchrotron Radiation Laboratory, Hefei, Anhui 230026, China
| |
Collapse
|
3
|
Rao Y, Wang Y, Lin Z, Zhang X, Ding X, Yang Y, Liu Z, Zhang B. Comparative efficacy and pharmacological mechanism of Chinese patent medicines against anthracycline-induced cardiotoxicity: An integrated study of network meta-analysis and network pharmacology approach. Front Cardiovasc Med 2023; 10:1126110. [PMID: 37168657 PMCID: PMC10164985 DOI: 10.3389/fcvm.2023.1126110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Accepted: 04/04/2023] [Indexed: 05/13/2023] Open
Abstract
Background This study aimed to evaluate the efficacy of Chinese patent medicines (CPMs) combined with dexrazoxane (DEX) against anthracycline-induced cardiotoxicity (AIC) and further explore their pharmacological mechanism by integrating the network meta-analysis (NMA) and network pharmacology approach. Methods We searched for clinical trials on the efficacy of DEX + CPMs for AIC until March 10, 2023 (Database: PubMed, Embase, Cochrane Library, Chinese National Knowledge Infrastructure, China Science and Technology Journal and China Online Journals). The evaluating outcomes were cardiac troponin I (cTnI) level, creatine kinase MB (CK-MB) level, left ventricular ejection fraction (LVEF) value, and electrocardiogram (ECG) abnormal rate. Subsequently, the results of NMA were further analyzed in combination with network pharmacology. Results We included 14 randomized controlled trials (RCTs) and 1 retrospective cohort study (n = 1,214), containing six CPMs: Wenxinkeli (WXKL), Cinobufotalin injection (CI), Shenqifuzheng injection (SQFZ), Shenmai injection (SM), Astragalus injection (AI) and AI + CI. The NMA was implemented in Stata (16.0) using the mvmeta package. Compared with using DEX only, DEX + SM displayed the best effective for lowering cTnI level (MD = -0.44, 95%CI [-0.56, -0.33], SUCRA 93.4%) and improving LVEF value (MD = 14.64, 95%CI [9.36, 19.91], SUCRA 98.4%). DEX + SQFZ showed the most effectiveness for lowering CK-MB level (MD = -11.57, 95%CI [-15.79, -7.35], SUCRA 97.3%). And DEX + AI + CI has the highest effectiveness for alleviating ECG abnormalities (MD = -2.51, 95%CI [-4.06, -0.96], SUCRA 96.8%). So that we recommended SM + DEX, SQFZ + DEX, and DEX + AI + CI as the top three effective interventions against AIC. Then, we explored their pharmacological mechanism respectively. The CPMs' active components and AIC-related targets were screened to construct the component-target network. The potential pathways related to CPMs against AIC were determined by KEGG. For SM, we identified 118 co-targeted genes of active components and AIC, which were significantly enriched in pathways of cancer pathways, EGFR tyrosine kinase inhibitor resistance and AGE-RAGE signaling pathway in diabetic complications. For SQFZ, 41 co-targeted genes involving pathways of microRNAs in cancer, Rap1 signaling pathway, MAPK signaling pathway, and lipid and atherosclerosis. As for AI + CI, 224 co-targeted genes were obtained, and KEGG analysis showed that the calcium signaling pathway plays an important role except for the consistent pathways of SM and SQFZ in anti-AIC. Conclusions DEX + CPMs might be positive efficacious interventions from which patients with AIC will derive benefits. DEX + SM, DEX + SQFZ, and DEX + AI + CI might be the preferred intervention for improving LVEF value, CK-MB level, and ECG abnormalities, respectively. And these CPMs play different advantages in alleviating AIC by targeting multiple biological processes.
Collapse
Affiliation(s)
- Yifei Rao
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Yu Wang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Zhijian Lin
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
- Center for Pharmacovigilance and Rational Use of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Xiaomeng Zhang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
- Center for Pharmacovigilance and Rational Use of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
| | - Xueli Ding
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Ying Yang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Zeyu Liu
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Bing Zhang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
- Center for Pharmacovigilance and Rational Use of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China
- Correspondence: Bing Zhang
| |
Collapse
|
4
|
Wang Y, Rao Y, Yin Y, Li Y, Lin Z, Zhang B. A bibliometric analysis of global trends in the research field of pharmaceutical care over the past 20 years. Front Public Health 2022; 10:980866. [PMID: 36324463 PMCID: PMC9618714 DOI: 10.3389/fpubh.2022.980866] [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: 07/29/2022] [Accepted: 09/30/2022] [Indexed: 01/25/2023] Open
Abstract
Pharmaceutical care is essential in building up the basics of public health and clinical care. A comprehensive understanding of global status in the field of pharmaceutical care is necessary for directing its research frontiers and future trends. Therefore, this study aims to make a bibliometric analysis to track the development of pharmaceutical care research worldwide during the past two decades. The publications regarding pharmaceutical care were culled from the Web of Science Core Collection (WoSCC). Countries, institutions, authors, journals, references, and keywords in this field were visually analyzed by using VOSviewer (version 1.6.17) and CiteSpace (Version 5.8.R3). As a result, 3,597 publications (3,177 articles and 420 reviews) were obtained. The annual yields grew more than three times in the past two decades, from 54 records in 2002 to 379 papers in 2021. The United States played the leading role in this research from multiple aspects, including publication (n = 1,208), citations (n = 28,759), funding agencies, and collaboration worldwide. The University of Sydney in Australia was the most contributed institution with the greatest number of publications (n = 112) in pharmaceutical care research. Hersberger KE from the University of Basel was the most productive author (n = 40). Chen TF from the University of Sydney was the author who owed the highest H-index of 19 and most citations (n = 1,501). They both significantly impacted this field. American Journal of Health System Pharmacy produced the most publications, while Pharmacotherapy had the highest IF (IF2020 = 4.705) in this field. Clusters networks of co-cited references and keywords suggested that clinical pharmacy is an essential theme in pharmaceutical care. Terms of medication safety and critical care recognized by burst analysis of keywords also hint at the recent attention on clinical pharmacy. The present bibliometrics analysis may provide a comprehensive overview and valuable reference for future researchers and practitioners in the research field of pharmaceutical care.
Collapse
Affiliation(s)
- Yu Wang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Yifei Rao
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Yuling Yin
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Yaolei Li
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Zhijian Lin
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China,Center for Pharmacovigilance and Rational Use of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China,*Correspondence: Zhijian Lin
| | - Bing Zhang
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China,Center for Pharmacovigilance and Rational Use of Chinese Medicine, Beijing University of Chinese Medicine, Beijing, China,Bing Zhang
| |
Collapse
|
5
|
Barbera JA, Kiely D, Gruenig E, Balasubramanian V, Vizza CD, Elwing J, Sood N, Rao Y, Holdstock L, Seaman S, Broderick M, White RJ. Efficacy and dose-response relationship of oral treprostinil in PAH patients on monotherapy or dual background therapy. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.1920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
FREEDOM-C and FREEDOM-C2 were randomized, placebo-controlled, double-blinded international, multicenter studies investigating the use of oral treprostinil (TRE) in subjects on mono or dual background pulmonary arterial hypertension (PAH) therapies. Both had a primary endpoint of change in 6-minute walk distance (6MWD) at Week 16 vs baseline. Previous post-hoc analyses combining mono and dual therapy subjects (PDE-5i and/or ERA) from these studies revealed a TRE dose-dependent increase in 6MWD. (1. White & Rao, 2016)
Purpose
This post-hoc analysis was performed to determine if subjects from FREEDOM-C and FREEDOM-C2 derive improvements in 6MWD with increasing doses of TRE when stratified by mono or dual background therapy and to determine if PAH background therapies (mono or dual) impacted 6MWD.
Methods
All active subjects (n=331) from FREEDOM-C and FREEDOM-C2 were grouped into TRE dose tertiles (low-dose: ≤2 mg BID, mid-dose: >2 mg to ≤3.5 mg BID, and high-dose: >3.5 mg BID). Placebo subjects (n=329) were in a separate 0 mg dose group. No data imputation was implemented.
Comparisons of 6MWD change at Weeks 4, 8, 12, and 16 between mono and dual therapy subgroups at any dose group were performed using a two-sample t-test or nonparametric Wilcoxon rank-sum test. The nonparametric Kruskal-Wallis test was conducted with subsequent pairwise comparisons of 6MWD change at Week 16 between the four dose groups through Dunn's approach. Additionally, the Jonckheere-Terpstra test was used to assess the linear trend for 6MWD improvement with higher doses of TRE.
Results
Baseline characteristics of the combined intention to treat (ITT) population and summary of 6MWD for subjects with both baseline and Week 16 data are in Table 1. 6MWD change improved steadily to Week 16 in subjects at higher TRE doses, regardless of the number of PAH background therapies (Figure 1). No statistical differences were found between mono and dual therapy at any time point or for any dose group. At Week 16, there was a significant difference in 6MWD change between the placebo group and high dose group within both mono and dual background therapy subjects. The difference between the low- and high-dose groups was significant for subjects on dual background therapy. There was a significant positive linear trend for TRE doses in 6MWD improvement at Week 16 for both monotherapy subjects (one-sided p-value = 0.0002) and dual therapy subjects (one-sided p-value = 0.0242).
Conclusions
6MWD improved in PAH patients regardless of their background therapy (monotherapy or dual background) and derive greater 6MWD improvements with higher doses of TRE. The observed dose-dependent 6MWD increase supports the use of TRE in sequential combination with background therapies (mono or dual).
Funding Acknowledgement
Type of funding sources: Private company. Main funding source(s): United Therapeutics Corporation
Collapse
Affiliation(s)
- J A Barbera
- Hospital Clinic de Barcelona , Barcelona , Spain
| | - D Kiely
- Sheffield Teaching Hospitals NHS Trust , Sheffield , United Kingdom
| | - E Gruenig
- Thoracic Clinic-Heidelberg , Heidelberg , Germany
| | - V Balasubramanian
- University of California San Francisco , Fresno , United States of America
| | - C D Vizza
- Sapienza University of Rome , Rome , Italy
| | - J Elwing
- University of Cincinnati Medical Center , Cincinnati , United States of America
| | - N Sood
- University of California , Davis , United States of America
| | - Y Rao
- United Therapeutics Corporation , Research Triangle Park , United States of America
| | - L Holdstock
- United Therapeutics Corporation , Research Triangle Park , United States of America
| | - S Seaman
- United Therapeutics Corporation , Research Triangle Park , United States of America
| | - M Broderick
- United Therapeutics Corporation , Research Triangle Park , United States of America
| | - R J White
- University of Rochester Medical Center , Rochester , United States of America
| |
Collapse
|
6
|
Podila K, Chen Q, Huang X, Li C, Rao Y, Waddington G, Jafri T. Coupled simulations for prismatic gas-cooled reactor. Nuclear Engineering and Design 2022. [DOI: 10.1016/j.nucengdes.2022.111858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
7
|
Luo Y, Rao Y, Gu X, Chai P, Yang Y, Lin J, Xu X, Jia R, Xu S. Novel MSH6 mutation predicted metastasis in eyelid and periocular squamous cell carcinoma. J Eur Acad Dermatol Venereol 2022; 36:2331-2342. [PMID: 35855666 DOI: 10.1111/jdv.18454] [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] [Received: 12/27/2021] [Accepted: 06/03/2022] [Indexed: 11/28/2022]
Abstract
BACKGROUND Our previous research revealed the relative local aggressiveness of eyelid and periocular squamous cell carcinoma (EPSCC), but its distinct genetic characteristics involved remain unknown. OBJECTIVES We conducted this study based on next-generation sequencing to identify the genetic distinctiveness of EPSCC and damaging mutations for possible etiology and poor prognosis. METHODS We performed sequencing using a 556-gene panel (smartonco) in 48 EPSCCs. Cox hazards model was applied to explore mutated genes that increase risk of metastasis and death. Pathogenesis of the mutations was predicted by sequence alignment algorithms. RESULTS The most commonly mutated genes were KMT2C (N=17, 35%), LRP1B (N=14, 29%), KMT2D (N=12, 25%), PTCH1(N=10, 21%) and TP53(N=10, 21%). DNA mismatch repair (MMR) genes (42%) like MSH6(19%) and MLH3(12%) were among the most frequently mutated genes. Cell cycle regulators including TP53(21%) and CDKN2A (10%) were less frequently mutated than in other squamous cell carcinomas (SCCs). Ultra violet exposure, MMR deficiency and aging were the main etiology. Of note, KMT2C has a deleterious mutation hotspot. Patients burdened with MSH6 mutation has a higher risk of overall metastasis (P=0.045, HR=5.165) and nodal metastasis (P=0.022, HR=14.038). Moreover, a hotspot mutation MSH6E52A brought an even higher risk of nodal metastasis (P=0.011, HR=18.745). CONCLUSIONS EPSCCs displayed a unique mutation profile from cutaneous SCCs and mucosal SCCs. We have identified novel damaging mutations in epigenetic regulators like KMT2C boosted early onset of EPSCCs in addition to UVR, aging or MMR deficiency. And malfunction of MMR genes worsened prognosis.
Collapse
Affiliation(s)
- Y Luo
- Department of Ophthalmology, Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China
| | - Y Rao
- Department of pathology, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - X Gu
- Department of Ophthalmology, Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China
| | - P Chai
- Department of Ophthalmology, Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China
| | - Y Yang
- Department of Ophthalmology, Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China
| | - J Lin
- Department of pathology, Shanghai Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China
| | - X Xu
- Department of Ophthalmology, Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China
| | - R Jia
- Department of Ophthalmology, Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China
| | - S Xu
- Department of Ophthalmology, Ninth People's Hospital, Shanghai JiaoTong University School of Medicine, Shanghai, China.,Shanghai Key Laboratory of Orbital Diseases and Ocular Oncology, Shanghai, China
| |
Collapse
|
8
|
Zheng X, Chen Z, Wu X, LI X, Xie Y, Wu J, Xiao M, Cao S, Wei Q, Zhu W, Rao Y, Chen Q, Wen Y, Gu J. POS1002 DIAGNOSTIC DELAY AND ITS ASSOCIATED FACTORS IN CHINESE AXIAL SPONDYLOARTHRITIS: A RETROSPECTIVE STUDY. Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.4612] [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: 11/04/2022]
Abstract
BackgroundFew data on the prolonged diagnosis and its associated factors in Chinese axial spondyloarthritis (axSpA) is available.ObjectivesTo delineate the landscape of diagnostic delay in Chinese axSpA, investigate its associated factors and explore its potential impact on medication modalities.MethodsA total of 1,295 patients fulfilling the ASAS classification criteria were obtained. Demographic and clinical data were collected through predesigned questionnaires and available medical records. Logistic regression analyses in univariate and multivariable model were performed, using the median of diagnostic delay as cut-off point for group classification. Differences between early and late diagnosed group were subsequently compared by the Pearson chi-square test or Mann-Whitney U test.ResultsThe median (IQR) diagnostic delay in Chinese axSpA was 3.0 (1.0~7.0) years and 24.8% of them reported a history of misdiagnosis. Older age at onset (OR=0.97, P<0.001) and higher education attainment (P=0.001) were correlated with early diagnosis of axSpA, whereas coming from less developed areas (P=0.002), a history of peripheral arthritis at the time of diagnosis (OR=1.58, P=0.002) and history of misdiagnosis (OR=1.98, P<0.001) increased the risk of diagnostic delay. Medication modalities were similar between two groups, but the proportion with no medication ever and percentage without regular medication in recent 3 months were higher in the late diagnosed group than early group (26.5% vs. 20.7%, P=0.02; 34.7% vs. 28.6%, P=0.02).ConclusionOur findings depicted a detailed spectrum of diagnostic delay in Chinese axSpA, verified five associated factors and pinpointed a remarkable treatment delay even after diagnosis, especially in late diagnosis group.References[1]Masson Behar V, Dougados M, Etcheto A, Kreis S, Fabre S, Hudry C, et al. Diagnostic delay in axial spondyloarthritis: A cross-sectional study of 432 patients. Joint bone spine. 2017;84(4):467-71.Figure 1.Cumulative distribution of age at onset and age at diagnosis in Chinese axSpA(A) the entire group. (B) stratified by early and late diagnosed group. (C) stratified by education level (college, middle school, secondary school). (D) stratified by history of peripheral arthritis when diagnosed. (E) stratified by history of misdiagnoses when diagnosed. (F) stratified by native place, as statistical significance was found between eastern coastal and western China, only these two groups were presented.Disclosure of InterestsNone declared
Collapse
|
9
|
Lei Z, Cai W, Rao Y, Wang K, Jiang Y, Liu Y, Jin X, Li J, Lv Z, Jiao S, Zhang W, Yan P, Zhang S, Cao R. Coordination modulation of iridium single-atom catalyst maximizing water oxidation activity. Nat Commun 2022; 13:24. [PMID: 35013202 PMCID: PMC8748886 DOI: 10.1038/s41467-021-27664-z] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 12/01/2021] [Indexed: 12/20/2022] Open
Abstract
Single-atom catalysts (SACs) have attracted tremendous research interests in various energy-related fields because of their high activity, selectivity and 100% atom utilization. However, it is still a challenge to enhance the intrinsic and specific activity of SACs. Herein, we present an approach to fabricate a high surface distribution density of iridium (Ir) SAC on nickel-iron sulfide nanosheet arrays substrate (Ir1/NFS), which delivers a high water oxidation activity. The Ir1/NFS catalyst offers a low overpotential of ~170 mV at a current density of 10 mA cm-2 and a high turnover frequency of 9.85 s-1 at an overpotential of 300 mV in 1.0 M KOH solution. At the same time, the Ir1/NFS catalyst exhibits a high stability performance, reaching a lifespan up to 350 hours at a current density of 100 mA cm-2. First-principles calculations reveal that the electronic structures of Ir atoms are significantly regulated by the sulfide substrate, endowing an energetically favorable reaction pathway. This work represents a promising strategy to fabricate high surface distribution density single-atom catalysts with high activity and durability for electrochemical water splitting.
Collapse
Affiliation(s)
- Zhanwu Lei
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Wenbin Cai
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Yifei Rao
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Kuan Wang
- Beijing Key Laboratory of Microstructure and Properties of Solids, Beijing University of Technology, Beijing, 100124, China
| | - Yuyuan Jiang
- Beijing Key Laboratory of Microstructure and Properties of Solids, Beijing University of Technology, Beijing, 100124, China
| | - Yang Liu
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Xu Jin
- Research Center of New Energy, Research Institute of Petroleum Exploration and Development (RIPED), PetroChina, Beijing, 100083, China
| | - Jianming Li
- Research Center of New Energy, Research Institute of Petroleum Exploration and Development (RIPED), PetroChina, Beijing, 100083, China
| | - Zhengxing Lv
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201204, China
| | - Shuhong Jiao
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China.
| | - Wenhua Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China.
| | - Pengfei Yan
- Beijing Key Laboratory of Microstructure and Properties of Solids, Beijing University of Technology, Beijing, 100124, China
| | - Shuo Zhang
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201204, China
| | - Ruiguo Cao
- Hefei National Laboratory for Physical Sciences at the Microscale, CAS Key Laboratory of Materials for Energy Conversion, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui, 230026, China.
| |
Collapse
|
10
|
Tang L, Rao Y, Wei L, Zheng H, Liu H, Zhang W, Tang K. A‐site Cation Defects (Ba
0.
5
Sr
0
.5
)
1–
x
Co
0
.
8
Fe
0
.
2
O
3
–
δ
Perovskites as Active Oxygen Evolution Reaction Catalyst in Alkaline Electrolyte
†. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100215] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Lulu Tang
- Department of Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Yifei Rao
- CAS Key Laboratory of Materials for Energy Conversion, Department of Material Science and Technology University of Science and Technology of China Hefei Anhui 230026 China
| | - Lianwei Wei
- Department of Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Hui Zheng
- Department of Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Huimin Liu
- Department of Chemistry University of Science and Technology of China Hefei Anhui 230026 China
| | - Wenhua Zhang
- CAS Key Laboratory of Materials for Energy Conversion, Department of Material Science and Technology University of Science and Technology of China Hefei Anhui 230026 China
- Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui 230026 China
| | - Kaibin Tang
- CAS Key Laboratory of Materials for Energy Conversion, Department of Material Science and Technology University of Science and Technology of China Hefei Anhui 230026 China
- Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui 230026 China
| |
Collapse
|
11
|
Du H, Rao Y, Liu R, Deng K, Guan Y, Luo D, Mao Q, Yu J, Bo T, Fan Z, Ouyang H, Feng Y, Zhu W. Proteomics and metabolomics analyses reveal the full spectrum of inflammatory and lipid metabolic abnormalities in dyslipidemia. Biomed Chromatogr 2021; 35:e5183. [PMID: 34058018 DOI: 10.1002/bmc.5183] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 05/18/2021] [Accepted: 05/26/2021] [Indexed: 01/21/2023]
Abstract
Dyslipidemia is a common, chronic metabolic disease associated with cardiovascular complications. Due to the multiplicity of etiological factors, the pathogenesis of dyslipidemia is still unclear. In this study, we combined proteomics and metabolomics methods to analyze the plasma of patients with dyslipidemia and healthy subjects. isobaric tags for relative and absolute quantification (iTRAQ) markers, combined with LC-MS/MS proteomics technology and the UHPLC/Orbitfast-X Tribrid system, were used to establish the metabolite profile in clinical dyslipidemia. A total of 137 differentially expressed proteins, mainly related to biological processes such as protein activation cascades, adaptive immune responses, complement activation, acute inflammatory responses, and regulation of acute inflammatory responses, were identified. These proteins are involved in the regulation of important metabolic pathways, such as immunity and inflammation, coagulation and hemostasis, lipid metabolism, and oxidation and antioxidant defenses. The analysis of clinical metabolites showed there were 69 different metabolites in plasma, mainly related to glycerolipid, sphingolipid, porphyrin, α-linolenic acid, linoleic acid, and arachidonic acid metabolism, suggesting that the regulation of inflammation and lipid metabolism may be disturbed in patients with dyslipidemia. Among these, significant changes were observed in indole-3-propionic acid (IPA), which is considered as a potential biomarker of dyslipidemia. The combined analysis of proteins and metabolites showed that arachidonic acid, linoleic acid, and lipid metabolic pathways were closely related to dyslipidemia. IPA may be a potential biomarker. The information provided in this study may provide new insights into the pathogenesis of animal models of dyslipidemia and related disease models, as well as potential intervention targets.
Collapse
Affiliation(s)
- Hui Du
- Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Yifei Rao
- Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Ronghua Liu
- Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Kesui Deng
- The Affiliated Hospital of Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Yongmei Guan
- Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Dewei Luo
- Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Qiping Mao
- Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Jianwei Yu
- The Affiliated Hospital of Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Tao Bo
- Thermo Fisher Scientific-CN, Shanghai, China
| | - Ziquan Fan
- Thermo Fisher Scientific-CN, Shanghai, China
| | - Hui Ouyang
- Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Yulin Feng
- State Key Laboratory of Innovative Drug and Efficient Energy-Saving Pharmaceutical Equipment, Nanchang, China
| | - Weifeng Zhu
- Key Laboratory of Ministry of Education of Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| |
Collapse
|
12
|
Yao M, Li J, He M, Ouyang H, Ruan L, Huang X, Rao Y, Yang S, Zhou X, Bai J. Investigation and identification of the multiple components of
Rheum officinale
Baill. using ultra‐high‐performance liquid chromatography coupled with quadrupole‐time‐of‐flight tandem mass spectrometry and data mining strategy. J Sep Sci 2020; 44:681-690. [DOI: 10.1002/jssc.202000735] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 11/12/2020] [Accepted: 11/20/2020] [Indexed: 11/11/2022]
Affiliation(s)
- Min Yao
- Jiangxi University of Traditional Chinese Medicine Nanchang P. R. China
- Jiangxi Institute for Drug Control Nanchang P. R. China
| | - Junmao Li
- Jiangxi University of Traditional Chinese Medicine Nanchang P. R. China
| | - Mingzhen He
- Jiangxi University of Traditional Chinese Medicine Nanchang P. R. China
| | - Hui Ouyang
- Jiangxi University of Traditional Chinese Medicine Nanchang P. R. China
| | - Lulu Ruan
- Jiangxi University of Traditional Chinese Medicine Nanchang P. R. China
| | - Xiaofang Huang
- Jiangxi University of Traditional Chinese Medicine Nanchang P. R. China
| | - Yifei Rao
- Jiangxi University of Traditional Chinese Medicine Nanchang P. R. China
| | - Shilin Yang
- Jiangxi University of Traditional Chinese Medicine Nanchang P. R. China
| | - Xiang Zhou
- Jiangxi University of Traditional Chinese Medicine Nanchang P. R. China
| | - Jiqing Bai
- Jiangxi University of Traditional Chinese Medicine Nanchang P. R. China
- College of Pharmacy Shaanxi University of Chinese Medicine Xianyang P. R. China
| |
Collapse
|
13
|
He YJ, Wang YQ, Tang HR, He M, Rao Y, Zhou R, Wang JL. [Clinical efficacy and pregnancy outcomes of fertility-preserving re-treatment after recurrence of the patient with atypical endometrial hyperplasia and early stage endometrial carcinoma]. Zhonghua Fu Chan Ke Za Zhi 2020; 55:21-28. [PMID: 32074769 DOI: 10.3760/cma.j.issn.0529-567x.2020.01.005] [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] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the clinical efficacy and pregnancy outcomes of fertility- preserving re-treatment in patients with recurrent atypical endometrial hyperplasia (AEH) and early stage endometrial carcinoma (EEC) after achieved complete remission (CR) of primary fertility-preserving therapy. Methods: There were 104 cases of AEH and EEC collected from 9 hospitals in the multi-center research network platform of fertility-preserving therapy of endometrial carcinoma in China from January 2005 to May 2019. Thirth-one cases of them relapsed from four hospitals mentioned above,who achieved CR after primary fertility-preserving therapy,was analyzed retrospectively. Of the 31 cases, 27 cases chose fertility-preserving re-treatment. The demographic characteristics, re-treatment effect, clinical factors and pregnancy outcomes were observed. Results: (1) There were 16 AEH cases and 11 ECC cases among 27 recurrent patients who chose fertility-preserving therapy again. After re-treatment, CR was found in 13 out of 16 cases of AEH and 9 out of 11 cases of EEC. The overall CR rate was 81% (22/27). (2) After CR of recurrence, 5 cases (23%, 5/22) of re-recurrence were found after with a median time of 33 months (range 21-80 months). There were 4 cases underwent comprehensive surgical staging, and 1 patient chose the third round of fertility preservation therapy with fully informed consent, and CR was reached after 15 months. (3) There were 16 cases with pregnancy intention, with a total of 12 pregnancies, including 5 cases were natural pregnancy and 7 cases were assisted reproductive technology pregnancy. There were 5 live births. The follow-up time was up to May 2019, and the median follow-up time was 73 months (range 0-123 months). All 27 patients had disease free survival. Conclusions: Recurrent patients with AEH and EEC after achieving successful fertility-preserving therapy could choose fertility-preserving therapy again with comprehensive assessment and fully informed consent. After re-treatment, there is a certain tumor CR rate and pregnancy rate, while the close follow-up is required during treatment.
Collapse
Affiliation(s)
- Y J He
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
| | - Y Q Wang
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
| | - H R Tang
- Department of Obstetrics and Gynecology, Peking University Shenzhen Hospital, Shenzhen 518036, China
| | - M He
- Department of Obstetrics and Gynecology, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China
| | - Y Rao
- Department of Gynecological Oncology, Tianjin Central Hospital of Gynecology Obstetrics, Tianjin 300100, China
| | - R Zhou
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
| | - J L Wang
- Department of Obstetrics and Gynecology, Peking University People's Hospital, Beijing 100044, China
| |
Collapse
|
14
|
Wen Z, He M, Peng C, Rao Y, Li J, Li Z, Du L, Li Y, Zhou M, Hui O, Feng Y, Yang S. Metabolomics and 16S rRNA Gene Sequencing Analyses of Changes in the Intestinal Flora and Biomarkers Induced by Gastrodia-Uncaria Treatment in a Rat Model of Chronic Migraine. Front Pharmacol 2019; 10:1425. [PMID: 31920639 PMCID: PMC6929670 DOI: 10.3389/fphar.2019.01425] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [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: 07/14/2019] [Accepted: 11/08/2019] [Indexed: 12/24/2022] Open
Abstract
Accumulating evidence suggests that natural medicines have notable curative effects on neurological conditions, such as migraine, that are mediated by regulating the gut microbial flora. A natural medicine pair used in traditional Chinese medicine, Gastrodia elata Blume and Uncaria rhynchophylla (Miq.) Miq. ex Havil. (GU), have shown excellent effect in treating migraine, yet the role of gut microbes in the therapeutic effect of GU in chronic migraine (CMG) is unknown. Here, we performed a 16S rRNA gene sequencing and metabolomics study of the effects of GU in a nitroglycerin (NTG)-induced rat model of CMG. Our results showed that the gut microbial community structure changed significantly and was similar to that of control rats after GU administration in CMG rats. Specifically, GU increased the relative abundance of Bacteroides and Coprococcus and reduced the abundance of Prevotella_1 and Escherichia-Shigella in CMG rats. The metabolomics profiles of the plasma and ileum contents of CMG rats obtained with an ultra-performance liquid chromatography-mass spectrometer (UPLC-MS) revealed similar biomarkers in both samples, and GU treatment reduced 3-indoxyl sulfate, glutamic acid, L-tyrosine, and L-arginine levels, and increased 5-HIAA, L-tryptophan, and linoleic acid levels in plasma. Correlation analysis showed that the affected bacteria were closely related to amino acid metabolism. Most importantly, GU treatment hardly affected biomarkers in feces samples after inhibiting the activity of gut microbes. Collectively, these findings indicate that structural changes in gut flora are closely related to host metabolism and that regulating the gut microbial community structure and function may be one of the important mechanisms underlying the therapeutic effects of GU in migraine.
Collapse
Affiliation(s)
- Zhiqi Wen
- School of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Mingzhen He
- School of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Chunyan Peng
- School of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Yifei Rao
- School of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Junmao Li
- School of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Zhifeng Li
- School of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Lijun Du
- State Key Laboratory of Innovative Drug and Efficient Energy, Jiangxi University of Traditional Chinese Medicine, Nanchang, China.,Laboratory of Molecular Pharmacology and Pharmaceutical Sciences, School of Life Sciences, Tsinghua University, Beijing, China
| | - Yan Li
- School of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Maofu Zhou
- School of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Ouyang Hui
- School of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Yulin Feng
- School of Pharmacy, Jiangxi University of Traditional Chinese Medicine, Nanchang, China.,State Key Laboratory of Innovative Drug and Efficient Energy, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| | - Shilin Yang
- State Key Laboratory of Innovative Drug and Efficient Energy, Jiangxi University of Traditional Chinese Medicine, Nanchang, China
| |
Collapse
|
15
|
Cai D, Rao Y, Zhan Y, Wang Q, Chen S. EngineeringBacillusfor efficient production of heterologous protein: current progress, challenge and prospect. J Appl Microbiol 2019; 126:1632-1642. [DOI: 10.1111/jam.14192] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2018] [Revised: 12/13/2018] [Accepted: 12/28/2018] [Indexed: 12/18/2022]
Affiliation(s)
- D. Cai
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Environmental Microbial Technology Center of Hubei Province Hubei Collaborative Innovation Center for Green Transformation of Bio‐Resources, College of Life Sciences, Hubei University Wuhan PR China
| | - Y. Rao
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Environmental Microbial Technology Center of Hubei Province Hubei Collaborative Innovation Center for Green Transformation of Bio‐Resources, College of Life Sciences, Hubei University Wuhan PR China
| | - Y. Zhan
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Environmental Microbial Technology Center of Hubei Province Hubei Collaborative Innovation Center for Green Transformation of Bio‐Resources, College of Life Sciences, Hubei University Wuhan PR China
| | - Q. Wang
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Environmental Microbial Technology Center of Hubei Province Hubei Collaborative Innovation Center for Green Transformation of Bio‐Resources, College of Life Sciences, Hubei University Wuhan PR China
| | - S. Chen
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Environmental Microbial Technology Center of Hubei Province Hubei Collaborative Innovation Center for Green Transformation of Bio‐Resources, College of Life Sciences, Hubei University Wuhan PR China
| |
Collapse
|
16
|
Qian X, Zhao H, Rao Y, Nan Y, Wang Z, Wang X, Lian Q, Li J. Abstract PR509. Anesth Analg 2016. [DOI: 10.1213/01.ane.0000492893.54552.a3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
17
|
Xu X, Rao Y, Liu D, Zhao Y. PT020 Factors Influencing Sleeping and the Impact of Sleeping on Quality of Life Among Chinese Middle-Aged Adults in Chongqing, China. Glob Heart 2016. [DOI: 10.1016/j.gheart.2016.03.452] [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: 11/17/2022] Open
|
18
|
Xu X, Liu L, Rao Y, Guo L, Zhao Y. PM017 Malnutrition in Early Life and Self-Reported Appetite in Adulthood in Chongqing, China. Glob Heart 2016. [DOI: 10.1016/j.gheart.2016.03.253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
|
19
|
Xu X, Zhu R, Xie W, Xiong W, Ran M, Rao Y, Sharma M, Shen X, Zhao Y. PS032 Attitude Toward Secondhand Smoke and Related Behaviors of Exposure to Secondhand Smoke Among Urban Community Female Non-Smokers in Chongqing, China. Glob Heart 2016. [DOI: 10.1016/j.gheart.2016.03.071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
|
20
|
Xu X, Zhu R, Xie W, Xiong W, Ran M, Rao Y, Sharma M, Shen X, Zhao Y. PS033 Secondhand Tobacco Smoke Exposure and Smoking-Related Knowledge Among Urban Community Female Non-Smokers in Chongqing, China. Glob Heart 2016. [DOI: 10.1016/j.gheart.2016.03.072] [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: 11/30/2022] Open
|
21
|
Cai B, Wen J, Rao Y, Tsien C, Huang J, Green O, Mutic S, Yablonskiy D, Gach H. SU-D-207A-04: Use of Gradient Echo Plural Contrast Imaging (GEPCI) in MR-Guided Radiation Therapy: A Feasibility Study Targeting Brain Treatment. Med Phys 2016. [DOI: 10.1118/1.4955651] [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: 11/07/2022] Open
|
22
|
Speirs C, LaBrash J, Mutic S, Rao Y, Rehman S, Roach M, Michalski J, Perkins S. PO-0859: Quantifying and categorizing plan rejections as a part of the clinical process improvement. Radiother Oncol 2016. [DOI: 10.1016/s0167-8140(16)32109-0] [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: 11/30/2022]
|
23
|
Abstract
OBJECTIVE To describe the quality of life (QOL) of the migrant population with pulmonary tuberculosis (PTB) in West China, and identify factors associated with QOL. METHODS A pilot investigation was conducted among 103 migrant individuals with PTB in Nanchong Region, Sichuan Province, China. The QOL and social support of the patients were investigated using a short version of the World Health Organization Quality of Life questionnaire and the Social Support Rating Scale, respectively. RESULTS The mean scores of the QOL of the migrant population were respectively 12.1, 12.9 and 11.7 for the physical, psychological and environmental domains; these were significantly lower than those of the general Chinese population. Non-parametric tests detected the significant effects of the following: 1) educational levels on all domains, including social relationship; 2) age on all domains, except psychological; 3) personal income on the physical and environmental domains; and 4) subjective support on all domains, except psychological. Multivariate logistic regression analyses confirmed that educational levels and subjective support were significantly associated with the global health status of the migrant population. CONCLUSIONS The QOL of patients with TB among the migrant population in West China was poor; education and subjective support were important influential factors.
Collapse
Affiliation(s)
- X-F Gao
- Department of Preventive Medicine, North Sichuan Medical College, Nanchong, Sichuan, China
| | - Y Rao
- Tuberculosis Dispensary, YiLong Center for Disease Control and Prevention, Nanchong, Sichuan, China
| |
Collapse
|
24
|
Shareef S, Sridhar I, Dakshayani K, Rao Y, Santhamma B. Evaluation of the effects of tramadol and diclofenac alone and in combination on post-cesarean pain. ACTA ACUST UNITED AC 2014. [DOI: 10.5455/2319-2003.ijbcp20140610] [Citation(s) in RCA: 5] [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: 11/03/2022]
|
25
|
|
26
|
Rao Y, Ma D, Li H, Esthappan J, Chang A, Grigsby P. A Clinically Useful Watershed-based Method of Auto-segmenting Apparent Diffusion Coefficient (ADC) Maps of Cervical Cancer. Int J Radiat Oncol Biol Phys 2012. [DOI: 10.1016/j.ijrobp.2012.07.1146] [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: 11/29/2022]
|
27
|
Sasikumar R, Rao Y. Development of hybrid clones for tetanus. N Biotechnol 2009. [DOI: 10.1016/j.nbt.2009.06.011] [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: 11/29/2022]
|
28
|
Rao Y, Wang YL, Li H, Zhang W, Liu J. Effects of Pregnancy on the Solubility of Halogenated Volatile Anaesthetics in Rat Blood and Tissues. Anaesth Intensive Care 2008; 36:830-4. [PMID: 19115652 DOI: 10.1177/0310057x0803600612] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study was designed to evaluate the effects of pregnancy on the solubility of halogenated volatile anaesthetics in rat blood and tissues. Tissue samples from 10 pregnant and 10 non-pregnant adult female Sprague Dawley rats, including the heart, liver, kidney and brain, were obtained and made into respective homogenates. Blood/gas and tissue/gas partition coefficients for halothane, sevoflurane and isoflurane were determined by the method of two-stage headspace equilibration by gas chromatography with each of the homogenates. Values were analysed by t-test or one-way analysis of variance. The solubility within blood and brain for halothane in the pregnant group (2.90 ± 0.44, 5.55 ± 0.73) was significantly lower than that of the non-pregnant group (3.42±0.23, 6.33±0.64; P <0.05). However, there were no significant differences between the two groups for liver, kidney or heart solubility. For sevoflurane and isoflurane, there were no significant differences in solubility between the two groups. In conclusion, pregnancy decreased the solubility of halothane within the blood and brain, whereas the solubility of halothane in other tissues including the liver, kidney and heart showed no significant alteration. Pregnancy did not affect the solubility of sevoflurane or isoflurane within blood or the other tissues studied.
Collapse
Affiliation(s)
- Y. Rao
- Department of Anesthesiology, Zhongnan Hospital, Wuhan University, Hubei, PR China
| | - Y.-L. Wang
- Department of Anesthesiology, Zhongnan Hospital, Wuhan University, Hubei, PR China
| | - H. Li
- Department of Anesthesiology, Zhongnan Hospital, Wuhan University, Hubei, PR China
| | - W. Zhang
- Department of Anesthesiology, Zhongnan Hospital, Wuhan University, Hubei, PR China
| | - J. Liu
- Department of Anesthesiology, Zhongnan Hospital, Wuhan University, Hubei, PR China
| |
Collapse
|
29
|
Narsaiah A, Reddy A, Rao Y, Kumar E, Prakasham R, Reddy B, Yadav J. Magnesium-Cadmium Chloride,
a Bimetallic Catalyst System for the Allylation of Aldehydes
with Allyl Bromide: An Efficient Protocol for the Synthesis
of Homoallylic Alcohols. SYNTHESIS-STUTTGART 2008. [DOI: 10.1055/s-0028-1093170] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
30
|
Zhou M, Lei M, Rao Y, Nie Q, Zeng H, Xia M, Liang F, Zhang D, Zhang X. Polymorphisms of Vasoactive Intestinal Peptide Receptor-1 Gene and Their Genetic Effects on Broodiness in Chickens. Poult Sci 2008; 87:893-903. [PMID: 18420979 DOI: 10.3382/ps.2007-00495] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Affiliation(s)
- M Zhou
- Department of Animal Genetics, Breeding and Reproduction, College of Animal Science, South China Agricultural University, Guangzhou 510642, Guangdong, China
| | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Ke JJ, Zhan J, Feng XB, Wu Y, Rao Y, Wang YL. A comparison of the effect of total intravenous anaesthesia with propofol and remifentanil and inhalational anaesthesia with isoflurane on the release of pro- and anti-inflammatory cytokines in patients undergoing open cholecystectomy. Anaesth Intensive Care 2008; 36:74-8. [PMID: 18326136 DOI: 10.1177/0310057x0803600113] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The aim of the study was to investigate the effects of two anaesthetic techniques (total intravenous technique vs. inhalational technique) on changes in pro- and anti-inflammatory cytokine levels during open cholecystectomy. Forty ASA PS I-II patients undergoing open cholecystectomy were randomly assigned to two groups. Group R received total intravenous anaesthesia with propofol and remifentanil and group F received balanced inhalational anaesthesia with isoflurane. The plasma levels of tumour necrosis factor-alpha (TNF-alpha), interleukin IL-6 and interleukin IL-10 were measured during and after surgery. The pro-inflammatory cytokine levels (TNF-alpha and IL-6) and the anti-inflammatory cytokine (IL-10) showed a significant increase in their concentrations compared with pre-induction levels in both groups (P < 0.05). By the end of anaesthesia and surgery, TNF-alpha and IL-6 were significantly lower in group R than in group F (P < 0.05). At the end of anaesthesia and 12 hours postoperatively, IL-10 levels in group R were higher than in group F (P < 0.05). These findings suggest that total intravenous anaesthesia using propofol and remifentanil suppresses the inflammatory response caused by surgery to a greater extent than a balanced inhalation technique using isoflurane.
Collapse
Affiliation(s)
- J J Ke
- Department of Anesthesiology, Zhongnan Hospital of Wuhan University, Hubei Province, Peoples Republic of China
| | | | | | | | | | | |
Collapse
|
32
|
Yadav J, Rao Y, Reddy A, Narsaiah A, Subba Reddy B. Phosphomolybdic Acid Supported on Silica Gel as Mild, Efficient and Cost-Effective Catalyst for Chemoselective Protection of Amines with di-tert-Butyl Dicarbonate. LETT ORG CHEM 2008. [DOI: 10.2174/157017808783743957] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
33
|
Reddy C, Rao Y, Kumar T, Reddy K, Chandrasekhar S. Hydroxylamine Derivatives as Nucleophiles in Ferrier Glycosylation: Synthesis of Aminoxy Pseudoglycals. SYNTHESIS-STUTTGART 2008. [DOI: 10.1055/s-2007-1000828] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
34
|
Yadav J, Reddy A, Rao Y, Narsaiah A, Reddy B. Samarium(III) Triflate Catalyzed Conjugate Addition of Amines to Electron-Deficient Alkenes. SYNTHESIS-STUTTGART 2007. [DOI: 10.1055/s-2007-990876] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
35
|
Werbowetski-Ogilvie TE, Seyed Sadr M, Jabado N, Angers-Loustau A, Agar NYR, Wu J, Bjerkvig R, Antel JP, Faury D, Rao Y, Del Maestro RF. Inhibition of medulloblastoma cell invasion by Slit. Oncogene 2006; 25:5103-12. [PMID: 16636676 PMCID: PMC2072874 DOI: 10.1038/sj.onc.1209524] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.2] [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: 11/18/2005] [Revised: 01/27/2006] [Accepted: 02/22/2006] [Indexed: 11/09/2022]
Abstract
Invasion of brain tumor cells has made primary malignant brain neoplasms among the most recalcitrant to therapeutic strategies. We tested whether the secreted protein Slit2, which guides the projection of axons and developing neurons, could modulate brain tumor cell invasion. Slit2 inhibited the invasion of medulloblastoma cells in a variety of in vitro models. The effect of Slit2 was inhibited by the Robo ectodomain. Time-lapse videomicroscopy indicated that Slit2 reduced medulloblastoma invasion rate without affecting cell direction or proliferation. Both medulloblastoma and glioma tumors express Robo1 and Slit2, but only medulloblastoma invasion is inhibited by recombinant Slit2 protein. Downregulation of activated Cdc42 may contribute to this differential response. Our findings reinforce the concept that neurodevelopmental cues such as Slit2 may provide insights into brain tumor invasion.
Collapse
Affiliation(s)
- T E Werbowetski-Ogilvie
- Brain Tumour Research Centre, Montreal Neurological Institute, McGill University, Montreal, QC, Canada
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
36
|
|
37
|
Vaidya RA, Vaidya ADB, Patwardhan B, Tillu G, Rao Y. Ayurvedic pharmacoepidemiology: a proposed new discipline. J Assoc Physicians India 2003; 51:528. [PMID: 12974443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
|
38
|
|
39
|
Wong K, Ren XR, Huang YZ, Xie Y, Liu G, Saito H, Tang H, Wen L, Brady-Kalnay SM, Mei L, Wu JY, Xiong WC, Rao Y. Signal transduction in neuronal migration: roles of GTPase activating proteins and the small GTPase Cdc42 in the Slit-Robo pathway. Cell 2001; 107:209-21. [PMID: 11672528 DOI: 10.1016/s0092-8674(01)00530-x] [Citation(s) in RCA: 431] [Impact Index Per Article: 18.7] [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: 11/29/2022]
Abstract
The Slit protein guides neuronal and leukocyte migration through the transmembrane receptor Roundabout (Robo). We report here that the intracellular domain of Robo interacts with a novel family of Rho GTPase activating proteins (GAPs). Two of the Slit-Robo GAPs (srGAPs) are expressed in regions responsive to Slit. Slit increased srGAP1-Robo1 interaction and inactivated Cdc42. A dominant negative srGAP1 blocked Slit inactivation of Cdc42 and Slit repulsion of migratory cells from the anterior subventricular zone (SVZa) of the forebrain. A constitutively active Cdc42 blocked the repulsive effect of Slit. These results have demonstrated important roles for GAPs and Cdc42 in neuronal migration. We propose a signal transduction pathway from the extracellular guidance cue to intracellular actin polymerization.
Collapse
Affiliation(s)
- K Wong
- Department of Anatomy and Neurobiology, Washington University School of Medicine, 660 South Euclid Avenue, Saint Louis, MO 63110, USA
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
40
|
Abstract
A new study demonstrating a pathway for neuronal migration in humans, but not in monkeys, suggests that migration has a key role in the evolution of the brain, as well as its development.
Collapse
|
41
|
Abstract
Phosphatidylinositol 3-kinase (PI3-K) has been shown to mediate insulin and insulin-like growth factor-1 (IGF-1)-induced nitric oxide (NO) generation and, thus, vascular tone. A role for PI3-K in G-protein-coupled receptor signal transduction has been reported. As beta (beta2)-adrenergic vascular actions are partly dependent on NO, we have investigated the role of PI3-K in isoproterenol (Iso) and IGF-1 induced endothelial NO synthase (ecNOS) activity in rat aortic endothelial cells (RAEC). Cell lysates of RAEC, exposed to Iso (10 micromol/L) for 5 min and 6 h, and to IGF-1 (100 nM) for 10 min and 6 h, or pretreated with PI3-K inhibitor Wortmannin (WT), were used for measuring PI3-K activity, p85kDa regulatory protein, and citrulline production. Results show that Iso and IGF-1 increased a p85 subunit and citrulline production, and also enhanced 32P incorporation into PIP3. Pretreatment with WT inhibited Iso-stimulated ecNOS, as well as, PI3-K activity. Iso enhanced association of ecNOS with the triton X-100-insoluble fraction of RAEC. These data indicate that the endothelial cell PI3-K pathway mediates, in part, the release of NO and subsequent vasorelaxation in response to this beta-agonist, as well as, IGF-1.
Collapse
Affiliation(s)
- E Isenović
- Department of Medicine, State University New York-Health Science Center, Brooklyn, New York, USA
| | | | | | | | | |
Collapse
|
42
|
|
43
|
|
44
|
Wu JY, Feng L, Park HT, Havlioglu N, Wen L, Tang H, Bacon KB, Jiang Zh, Zhang Xc, Rao Y. The neuronal repellent Slit inhibits leukocyte chemotaxis induced by chemotactic factors. Nature 2001; 410:948-52. [PMID: 11309622 PMCID: PMC2072862 DOI: 10.1038/35073616] [Citation(s) in RCA: 333] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Migration is a basic feature of many cell types in a wide range of species. Since the 1800s, cell migration has been proposed to occur in the nervous and immune systems, and distinct molecular cues for mammalian neurons and leukocytes have been identified. Here we report that Slit, a secreted protein previously known for its role of repulsion in axon guidance and neuronal migration, can also inhibit leukocyte chemotaxis induced by chemotactic factors. Slit inhibition of the chemokine-induced chemotaxis can be reconstituted by the co-expression of a chemokine receptor containing seven transmembrane domains and Roundabout (Robo), a Slit receptor containing a single transmembrane domain. Thus, there is a functional interaction between single and seven transmembrane receptors. Our results reveal the activity of a neuronal guidance cue in regulating leukocyte migration and indicate that there may be a general conservation of guidance mechanisms underlying metazoan cell migration. In addition, we have uncovered an inhibitor of leukocyte chemotaxis, and propose a new therapeutic approach to treat diseases involving leukocyte migration and chemotactic factors.
Collapse
Affiliation(s)
- J Y Wu
- Department of Pediatrics, and Molecular Biology and Pharmacology, Washington University School of Medicine, St Louis, Missouri 63110, USA.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
45
|
Hirata T, Fujisawa H, Wu JY, Rao Y. Short-range guidance of olfactory bulb axons is independent of repulsive factor slit. J Neurosci 2001; 21:2373-9. [PMID: 11264311 PMCID: PMC6762389] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023] Open
Abstract
During development, mitral cells, the major output neurons of the olfactory bulb, project their axons caudolaterally into the telencephalon and form the lateral olfactory tract (LOT). Two types of guidance cues have been suggested for this projection. First, a long-range factor Slit, which is secreted from the septum, repels mitral cell axons into a caudolateral direction. Second, the pathway of mitral cell axons contains a subset of neurons designated as lot cells, which guide the axons through short-range interactions. It is not clear how these two guidance cues relate to each other and how they share the physiological roles. Here we examined the behavior of mitral cell axons in organotypic culture on ectopic application of Slit and inhibition of endogenous Slit signaling. The results suggested that the short-range guidance cue in the LOT pathway functions independently from Slit. Furthermore, our results showed that removal of the septum and inhibition of Slit signaling did not affect the projection of mitral cell axons. Although the septum and exogenous Slit can repel olfactory bulb axons, our results cast doubts on the physiological relevance of the septum and endogenous Slit in guiding the projection of mitral cell axons.
Collapse
Affiliation(s)
- T Hirata
- Division of Brain Function, National Institute of Genetics, Mishima 411-8540, Japan.
| | | | | | | |
Collapse
|
46
|
Chen JH, Wen L, Dupuis S, Wu JY, Rao Y. The N-terminal leucine-rich regions in Slit are sufficient to repel olfactory bulb axons and subventricular zone neurons. J Neurosci 2001; 21:1548-56. [PMID: 11222645 PMCID: PMC6762944] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2000] [Revised: 11/06/2000] [Accepted: 11/14/2000] [Indexed: 02/19/2023] Open
Abstract
The Slit proteins are a new family of secreted guidance cues involved in axon guidance and neuronal migration. Each mammalian Slit protein contains >1400 amino acid residues, with four leucine-rich regions (LRRs), nine epidermal growth factor repeats, a laminin G domain, and a C-terminal cysteine-rich domain. A receptor for Slit is the transmembrane protein Roundabout (Robo), whose extracellular part contains five Ig domains and three fibronectin type III repeats. We report here that the LRRs in Slit are sufficient for binding to the Ig domains of Robo. Mutant forms of Slit containing only the LRRs function as chemorepellents for axons projecting from the olfactory bulb both in vitro and in the telencephalon. The LRRs can repel neurons migrating from the anterior subventricular zone (SVZa) to the olfactory bulb in brain slices isolated from neonatal rodents. However, the LRRs do not show repulsive effects on the SVZa neurons migrating in collagen gels. Our results indicate that the same LRRs are sufficient for guiding both axon projection and neuronal migration and suggest that the other regions in the Slit proteins may be involved in regulating the diffusion and distribution of the Slit proteins. The fact that the same domains are involved in guiding axon projection and neuronal migration further strengthens the idea of a conserved guidance mechanism for these important processes.
Collapse
Affiliation(s)
- J H Chen
- Department of Anatomy and Neurobiology, Washington University School of Medicine, St. Louis, Missouri 63110, USA
| | | | | | | | | |
Collapse
|
47
|
Rao Y, Xiao P, Xu S. Effects of intrahippocampal aniracetam treatment on Y-maze avoidance learning performance and behavioral long-term potentiation in dentate gyrus in rat. Neurosci Lett 2001; 298:183-6. [PMID: 11165437 DOI: 10.1016/s0304-3940(00)01744-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.2] [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: 10/18/2022]
Abstract
Effects of intrahippocampal treatment of aniracetam, a selective agonist for DL-alpha-amino-3-hydroxy-5-methyl-4-isoxazoleproionic acid (AMPA) receptors, on Y-maze avoidance learning task and behavioral long-term potentiation (LTP) in perforant path-dentate gyrus were studied in freely moving rats by using in vivo electrophysiology combined with behavioral tests. The results were as follows: (1) intrahippocampal treatment of aniracetam reversibly enhanced basal synaptic transmission in perforant path to dentate gyrus in a dosage dependent manner; (2) aniracetam produced improvement in Y-maze learning performance when administration occurred 5 min prior to maze learning; (3) aniracetam administration significantly facilitated behavioral LTP in dentate gyrus, while the maximal amplitude of LTP has no significant difference when compared to saline group. The present results indicate that hippocampal AMPA receptors are involved in learning and memory.
Collapse
Affiliation(s)
- Y Rao
- Institute of Senile Encephalopathy, The Second School of Medicine, Guangzhou University of Traditional Chinese Medicine, 510405, PR, Guangzhou, China.
| | | | | |
Collapse
|
48
|
Rao Y, Hoffmann E, Zia M, Bodin L, Zeman M, Sellers EM, Tyndale RF. Duplications and defects in the CYP2A6 gene: identification, genotyping, and in vivo effects on smoking. Mol Pharmacol 2000; 58:747-55. [PMID: 10999944 DOI: 10.1124/mol.58.4.747] [Citation(s) in RCA: 161] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
In humans, 80% of nicotine is metabolized to the inactive metabolite cotinine by the enzyme CYP2A6, which can also activate tobacco smoke procarcinogens (e.g., 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone). Previously, we demonstrated that individuals who are nicotine-dependent and have defective CYP2A6 alleles (*2, *3) smoked fewer cigarettes; however, we recognize that the genotyping method used for the CYP2A6*3 allele gave a high false-positive rate. In the current study we used improved genotyping methods to examine the effects of the defective CYP2A6*2 and CYP2A6*4 alleles on smoking behavior. We found that those with the defective alleles (N = 14) smoked fewer cigarettes per day than those homozygous (N = 277) for wild-type alleles (19 versus 28 cigarettes per day, P <.001). In addition, we identified a duplicated form of the CYP2A6 gene, corresponding to the gene deletion CYP2A6*4 allele, developed a genotyping assay, assessed the gene copy number, and examined its prevalence in Caucasian smokers (N = 296). We observed an ascending rank order for plasma cotinine and breath carbon monoxide levels (an index of smoke inhalation) in individuals with null (CYP2A6*2 and CYP2A6*4) alleles (N = 14), those homozygous for wild-type (CYP2A6*1/*1) alleles (N = 277), and those with our newly identified CYP2A6 gene duplication (N = 5). The phenotype, as determined by plasma nicotine/cotinine ratios, had a descending rank order for these three genotype groups that did not reach significance. Although further characterization is required for the duplication gene variant, these results extend our previous findings and suggest a substantial influence of CYP2A6 genotype and phenotype on smoking behavior.
Collapse
Affiliation(s)
- Y Rao
- Centre for Addictions and Mental Health, University of Toronto, Toronto, Canada
| | | | | | | | | | | | | |
Collapse
|
49
|
Rao Y, Wu Y. [The molecular mechanism of neuronal migration]. Sheng Li Ke Xue Jin Zhan 2000; 31:198-204. [PMID: 12545704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
A large amount of work since the late 1800 have shown that, during embryonic and postnatal development, the majority, if not all, neurons in mammalian nervous system have to migrate a certain distance to reach their final destination. An interesting question is how neurons are guided for their migration. We are interested in the molecular mechanisms underlying neuronal migration and our work published in 1999 indicates that there are diffusible molecules in the brain which can guide the direction of migrating neurons; specifically, a secreted protein called Slit is repulsive to neurons and its concentration gradient guides neuronal migration.
Collapse
Affiliation(s)
- Y Rao
- University of Washington, USA
| | | |
Collapse
|
50
|
Abstract
1. Human CYP2D6 is present in brain, metabolizes many drugs and has been implicated in Parkinson's and Alzheimer's diseases and some cancers. It is still unclear which of the six known rat CYP2D subfamily members is/are homologous to human CYP2D6. 2. In this study, RT-PCR, Southern and Western blotting and immunohistochemical techniques were used to study the distribution of CYP2D subfamily member mRNA and proteins across 10 rat brain regions. CYP2D subfamily mRNA and protein levels were correlated with brain dextromethorphan O-demethylation (DOD), a measure of human CYP2D6 and rat CYP2D1 activities. 3. The data showed a strong relationship between CYP2D1 and CYP2D1-18 with brain DOD activity. In addition, it was shown that CYP2D proteins are present in brain mitochondrial as well as microsomal membranes. CYP2D subfamily member mRNA and proteins varied across brain regions and were highly concentrated in specific cell types. 4. These data strongly suggest that CYP2D1 and not CYP2D5 mediates DOD activity in rat brain, and may be the rat homologue of human CYP2D6. The highly localized nature of CYP2D indicates that in specific neurones enzyme levels may approach hepatic levels and, hence, contribute to local alterations in brain drug metabolism.
Collapse
Affiliation(s)
- S Miksys
- Centre for Addictions and Mental Health, and Department of Pharmacology, University of Toronto, Ontario, Canada
| | | | | | | | | | | |
Collapse
|