1
|
Wang W, Su Y, Qi R, Li H, Jiang H, Li F, Li B, Sun H. Indoxacarb triggers autophagy and apoptosis through ROS accumulation mediated by oxidative phosphorylation in the midgut of Bombyx mori. Pestic Biochem Physiol 2024; 200:105812. [PMID: 38582584 DOI: 10.1016/j.pestbp.2024.105812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 02/01/2024] [Accepted: 02/03/2024] [Indexed: 04/08/2024]
Abstract
Indoxacarb has been widely utilized in agricultural pest management, posing a significant ecological threat to Bombyx mori, a non-target economic insect. In the present study, short-term exposure to low concentration of indoxacarb significantly suppressed the oxidative phosphorylation pathway, and resulted in an accumulation of reactive oxygen species (ROS) in the midgut of B. mori. While, the ATP content exhibited a declining trend but there was no significant change. Moreover, indoxacarb also significantly altered the transcription levels of six autophagy-related genes, and the transcription levels of ATG2, ATG8 and ATG9 were significantly up-regulated by 2.56-, 1.90-, and 3.36-fold, respectively. The protein levels of ATG8-I and ATG8-II and MDC-stained frozen sections further suggested an increase in autophagy. Furthermore, the protein level and enzyme activity of CASP4 showed a significant increase in accordance with the transcription levels of apoptosis-related genes, indicating the activation of the apoptotic signaling pathway. Meanwhile, the induction of apoptosis signals in the midgut cells triggered by indoxacarb was confirmed through TUNEL staining. These findings suggest that indoxacarb can promote the accumulation of ROS by inhibiting the oxidative phosphorylation pathway, thereby inducing autophagy and apoptosis in the midgut cells of B. mori.
Collapse
Affiliation(s)
- Wanwan Wang
- School of Life Sciences, Suzhou Medical College of Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Yue Su
- School of Life Sciences, Suzhou Medical College of Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Ruinan Qi
- School of Life Sciences, Suzhou Medical College of Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Hao Li
- School of Life Sciences, Suzhou Medical College of Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Hongrui Jiang
- School of Life Sciences, Suzhou Medical College of Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Fanchi Li
- School of Life Sciences, Suzhou Medical College of Soochow University, Suzhou, Jiangsu 215123, PR China; Guangxi Collaborative Innovation Center of Modern Sericulture and Silk, School of Chemistry and Bioengineering, Hechi University, Yizhou, China; Sericulture Institute of Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Bing Li
- School of Life Sciences, Suzhou Medical College of Soochow University, Suzhou, Jiangsu 215123, PR China; Guangxi Collaborative Innovation Center of Modern Sericulture and Silk, School of Chemistry and Bioengineering, Hechi University, Yizhou, China; Sericulture Institute of Soochow University, Suzhou, Jiangsu 215123, PR China.
| | - Haina Sun
- School of Life Sciences, Suzhou Medical College of Soochow University, Suzhou, Jiangsu 215123, PR China; Guangxi Collaborative Innovation Center of Modern Sericulture and Silk, School of Chemistry and Bioengineering, Hechi University, Yizhou, China; Sericulture Institute of Soochow University, Suzhou, Jiangsu 215123, PR China.
| |
Collapse
|
2
|
Su Y, Wang W, Dai Y, Qi R, Gu H, Guo X, Liu X, Ren Y, Li F, Li B, Sun H. JH degradation pathway participates in hormonal regulation of larval development of Bombyx mori following λ-cyhalothrin exposure. Chemosphere 2024; 349:140871. [PMID: 38056714 DOI: 10.1016/j.chemosphere.2023.140871] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 11/29/2023] [Accepted: 11/30/2023] [Indexed: 12/08/2023]
Abstract
λ-Cyhalothrin (λ-cyh), a widely utilized pyrethroid insecticide, poses serious threats to non-target organisms due to its persistence nature in the environment. Exposure to low concentrations of λ-cyh has been observed to result in prolonged larval development in Bombyx mori, leading to substantial financial losses in sericulture. The present study was undertaken to elucidate the underlying mechanisms for prolonged development caused by λ-cyh (LC10) exposure. The results showed that the JH Ⅲ titer was significantly increased at 24 h of λ-cyh exposure, and the JH interacting genes Methoprene-tolerant 2, Steroid Receptor Co-activator, Krüppel-homolog 1, and JH binding proteins were also up-regulated. Although the target of rapamycin (Tor) genes were induced by λ-cyh, the biosynthesis of JH in the corpora allata was not promoted. Notably, 13 JH degradation genes were found to be significantly down-regulated in the midgut of B. mori. The mRNA levels and enzyme activity assays indicated that λ-cyh had inhibitory effects on JH esterase, JH epoxide hydrolase, and JH diol kinase (JHDK). Furthermore, the suppression of JHDK (KWMTBOMO01580) was further confirmed by both western blot and immunohistochemistry. This study has offered a comprehensive perspective on the mechanisms underlying the prolonged development caused by insecticides, and our results also hold significant implications for the safe production of sericulture.
Collapse
Affiliation(s)
- Yue Su
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu, 215123, PR China
| | - Wanwan Wang
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu, 215123, PR China
| | - Yixin Dai
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu, 215123, PR China
| | - Ruinan Qi
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu, 215123, PR China
| | - Haoyi Gu
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu, 215123, PR China
| | - Xiqian Guo
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu, 215123, PR China
| | - Xinyu Liu
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu, 215123, PR China
| | - Yuying Ren
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu, 215123, PR China
| | - Fanchi Li
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu, 215123, PR China; Sericulture Institute of Soochow University, Suzhou, Jiangsu, 215123, PR China
| | - Bing Li
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu, 215123, PR China; Sericulture Institute of Soochow University, Suzhou, Jiangsu, 215123, PR China.
| | - Haina Sun
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu, 215123, PR China; Sericulture Institute of Soochow University, Suzhou, Jiangsu, 215123, PR China.
| |
Collapse
|
3
|
Wang W, Su Y, Liu X, Qi R, Li F, Li B, Sun H. Low concentration of indoxacarb interferes with the growth and development of silkworm by damaging the structure of midgut cells. Pestic Biochem Physiol 2023; 195:105567. [PMID: 37666598 DOI: 10.1016/j.pestbp.2023.105567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/28/2023] [Accepted: 08/04/2023] [Indexed: 09/06/2023]
Abstract
As an important economic insect, Bombyx mori plays an essential role in the development of the agricultural economy. Indoxacarb, a novel sodium channel blocker insecticide, has been widely used for the control of various pests in agriculture and forestry, and its environmental pollution caused by flight control operations has seriously affected the safe production of sericulture in recent years. However, the lethal toxicity and adverse effects of indoxacarb on silkworm remain largely unknown. In this study, the toxicity of indoxacarb on the 5th instar larvae of silkworm was determined, with an LC50 (72 h) of 2.07 mg/L. Short-term exposure (24 h) to a low concentration of indoxacarb (1/2 LC50) showed significantly reduced body weight and survival rate of silkworm larvae. In addition, indoxacarb also led to decreased cocoon weight and cocoon shell weight, but had no significant effects on pupation, adult eclosion, and oviposition. Histopathological and ultrastructural analysis indicated that indoxacarb could severely damage the structure of the midgut epithelial cells, and lead to physiological impairment of the midgut. A total of 3883 differentially expressed genes (DEGs) were identified by midgut transcriptome sequencing and functionally annotated using GO and KEGG. Furthermore, the transcription level and enzyme activity of the detoxification related genes were determined, and our results suggested that esterases (ESTs) might play a major role in metabolism of indoxacarb in the midgut of B. mori. Future studies to examine the detoxification or biotransformation function of candidate genes will greatly enhance our understanding of indoxacarb metabolism in B. mori. The results of this study provide a theoretical basis for elucidating the mechanism of toxic effects of indoxacarb on silkworm by interfering with the normal physiological functions of the midgut.
Collapse
Affiliation(s)
- Wanwan Wang
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Yue Su
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Xinyue Liu
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Ruinan Qi
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Fanchi Li
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China; Sericulture Institute of Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Bing Li
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China; Sericulture Institute of Soochow University, Suzhou, Jiangsu 215123, PR China.
| | - Haina Sun
- School of Basic Medicine and Biological Sciences, Soochow University, Suzhou, Jiangsu 215123, PR China; Sericulture Institute of Soochow University, Suzhou, Jiangsu 215123, PR China.
| |
Collapse
|
4
|
He HL, Qi R, Cui J, Wang HL, Hao XH, Liu HL. [The characteristics of plasma lipids in silicosis rat models were studied based on lipid metabolomics]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2023; 41:569-575. [PMID: 37667151 DOI: 10.3760/cma.j.cn121094-20221124-00558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
Objective: To screen the differential metabolites and metabolic pathways in silicosis model by analyzing plasma metabolomics of silicosis rats. Methods: In May 2021, twenty male SD rats were randomly divided into control group (C), 1-week silicosis group (S1W), 2-week silicosis group (S2W) and 4-week silicosis group (S4W), with 5 rats in each group. Rats were intratracheally instillated with 1ml crystalline SiO(2) suspension (50 mg/ml) or normal saline and were sacrificed after 1 week, 2 weeks and 4 weeks, HE staining was used to observe the lung pathology of rats. The plasma samples were analyzed by UPLC-IMS-QTOF mass spectrometer to screen out potential differential metabolites in silicosis models and analyze their lipid enrichment. Results: HE results showed that nodules formed in the silicosis model group, and with the extension of time, nodules gradually increased and alveolar structure was gradually destroyed. Metabolomics screened out 14 differential metabolites in S1W, 24 in S2W, and 28 in S4W, and found that the differential metabolites were mainly enriched in the metabolism of glycerophospholipid metabolism, fatty acid degradation, Glycosylphosphatidylinositol (GPI) -anchor biosynthesis, fatty acid elongation and other metabolic pathways. Conclusion: There are significant changes in plasma lipid metabolites in silicosis rat models.
Collapse
Affiliation(s)
- H L He
- School of Public Health, North China University of Science and Technology, Tangshan 063210, China
| | - R Qi
- Clinical Medical School, North China University of Science and Technology, Tangshan 063210, China
| | - J Cui
- School of Public Health, North China University of Science and Technology, Tangshan 063210, China
| | - H L Wang
- School of Public Health, North China University of Science and Technology, Tangshan 063210, China Hebei Key Laboratory of Organ Fibrosis, North China University of Science and Technology, Tangshan 063210, China
| | - X H Hao
- School of Public Health, North China University of Science and Technology, Tangshan 063210, China Hebei Key Laboratory of Organ Fibrosis, North China University of Science and Technology, Tangshan 063210, China
| | - H L Liu
- School of Public Health, North China University of Science and Technology, Tangshan 063210, China Hebei Key Laboratory of Organ Fibrosis, North China University of Science and Technology, Tangshan 063210, China
| |
Collapse
|
5
|
Li B, You X, Wang J, Peng Q, Yin S, Qi R, Ren Q, Hong Z. IAS-NET: Joint intraclassly adaptive GAN and segmentation network for unsupervised cross-domain in neonatal brain MRI segmentation. Med Phys 2021; 48:6962-6975. [PMID: 34494276 DOI: 10.1002/mp.15212] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 07/15/2021] [Accepted: 08/15/2021] [Indexed: 11/11/2022] Open
Abstract
PURPOSE In neonatal brain magnetic resonance image (MRI) segmentation, the model we trained on the training set (source domain) often performs poorly in clinical practice (target domain). As the label of target-domain images is unavailable, this cross-domain segmentation needs unsupervised domain adaptation (UDA) to make the model adapt to the target domain. However, the shape and intensity distribution of neonatal brain MRI images across the domains are largely different from adults'. Current UDA methods aim to make synthesized images similar to the target domain as a whole. But it is impossible to synthesize images with intraclass similarity because of the regional misalignment caused by the cross-domain difference. This will result in generating intraclassly incorrect intensity information from target-domain images. To address this issue, we propose an IAS-NET (joint intraclassly adaptive generative adversarial network (GAN) (IA-NET) and segmentation) framework to bridge the gap between the two domains for intraclass alignment. METHODS Our proposed IAS-NET is an elegant learning framework that transfers the appearance of images across the domains from both image and feature perspectives. It consists of the proposed IA-NET and a segmentation network (S-NET). The proposed IA-NET is a GAN-based adaptive network that contains one generator (including two encoders and one shared decoder) and four discriminators for cross-domain transfer. The two encoders are implemented to extract original image, mean, and variance features from source and target domains. The proposed local adaptive instance normalization algorithm is used to perform intraclass feature alignment to the target domain in the feature-map level. S-NET is a U-net structure network that is used to provide semantic constraint by a segmentation loss for the training of IA-NET. Meanwhile, it offers pseudo-label images for calculating intraclass features of the target domain. Source code (in Tensorflow) is available at https://github.com/lb-whu/RAS-NET/. RESULTS Extensive experiments are carried out on two different data sets (NeoBrainS12 and dHCP), respectively. There exist great differences in the shape, size, and intensity distribution of magnetic resonance (MR) images in the two databases. Compared to baseline, we improve the average dice score of all tissues on NeoBrains12 by 6% through adaptive training with unlabeled dHCP images. Besides, we also conduct experiments on dHCP and improved the average dice score by 4%. The quantitative analysis of the mean and variance of the synthesized images shows that the synthesized image by the proposed is closer to the target domain both in the full brain or within each class than that of the compared methods. CONCLUSIONS In this paper, the proposed IAS-NET can improve the performance of the S-NET effectively by its intraclass feature alignment in the target domain. Compared to the current UDA methods, the synthesized images by IAS-NET are more intraclassly similar to the target domain for neonatal brain MR images. Therefore, it achieves state-of-the-art results in the compared UDA models for the segmentation task.
Collapse
Affiliation(s)
- Bo Li
- School of Electronic Information and Communication, Huazhong University of Science and Technology, Wuhan, China
| | - Xinge You
- School of Electronic Information and Communication, Huazhong University of Science and Technology, Wuhan, China.,Shenzhen Research Institute, Huazhong University of Science and Technology, Shenzhen, China
| | - Jing Wang
- Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qinmu Peng
- School of Electronic Information and Communication, Huazhong University of Science and Technology, Wuhan, China.,Shenzhen Research Institute, Huazhong University of Science and Technology, Shenzhen, China
| | - Shi Yin
- School of Electronic Information and Communication, Huazhong University of Science and Technology, Wuhan, China
| | - Ruinan Qi
- Department of Radiology, Huazhong University of Science and Technology Hospital, Wuhan, China
| | - Qianqian Ren
- Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Hubei Province Key Laboratory of Molecular Imaging, Wuhan, China
| | - Ziming Hong
- School of Electronic Information and Communication, Huazhong University of Science and Technology, Wuhan, China
| |
Collapse
|
6
|
Ke LT, Feng K, Wang WT, Qin ZY, Yu CH, Wu Y, Chen Y, Qi R, Zhang ZJ, Xu Y, Yang XJ, Leng YX, Liu JS, Li RX, Xu ZZ. Near-GeV Electron Beams at a Few Per-Mille Level from a Laser Wakefield Accelerator via Density-Tailored Plasma. Phys Rev Lett 2021; 126:214801. [PMID: 34114880 DOI: 10.1103/physrevlett.126.214801] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 03/18/2021] [Accepted: 04/28/2021] [Indexed: 06/12/2023]
Abstract
A simple, efficient scheme was developed to obtain near-gigaelectronvolt electron beams with energy spreads of few per-mille level in a single-stage laser wakefield accelerator. Longitudinal plasma density was tailored to control relativistic laser-beam evolution, resulting in injection, dechirping, and a quasi-phase-stable acceleration. With this scheme, electron beams with peak energies of 780-840 MeV, rms energy spreads of 2.4‰-4.1‰, charges of 8.5-23.6 pC, and rms divergences of 0.1-0.4 mrad were experimentally obtained. Quasi-three-dimensional particle-in-cell simulations agreed well with the experimental results. The dechirping strength was estimated to reach up to 11 TeV/mm/m, which is higher than previously obtained results. Such high-quality electron beams will boost the development of compact intense coherent radiation sources and x-ray free-electron lasers.
Collapse
Affiliation(s)
- L T Ke
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - K Feng
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
| | - W T Wang
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
| | - Z Y Qin
- Department of Physics, Shanghai Normal University, Shanghai 200234, People's Republic of China
| | - C H Yu
- Department of Physics, Shanghai Normal University, Shanghai 200234, People's Republic of China
| | - Y Wu
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
| | - Y Chen
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
| | - R Qi
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
| | - Z J Zhang
- Department of Physics, Shanghai Normal University, Shanghai 200234, People's Republic of China
| | - Y Xu
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
| | - X J Yang
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
| | - Y X Leng
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
- School of Physical Science and Technology, Shanghai Tech University, Shanghai 200031, People's Republic of China
| | - J S Liu
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
- Department of Physics, Shanghai Normal University, Shanghai 200234, People's Republic of China
| | - R X Li
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
- School of Physical Science and Technology, Shanghai Tech University, Shanghai 200031, People's Republic of China
| | - Z Z Xu
- State Key Laboratory of High Field Laser Physics and CAS Center for Excellence in Ultra-intense Laser Science, Shanghai Institute of Optics and Fine Mechanics (SIOM), Chinese Academy of Sciences (CAS), Shanghai 201800, China
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
- School of Physical Science and Technology, Shanghai Tech University, Shanghai 200031, People's Republic of China
| |
Collapse
|
7
|
Zhao S, Qi R, Gao X, Chen H. 009 Hyperthermia controls DAB2 transcription in macrophage through inducing the separation of cJun and cFos heterodimers. J Invest Dermatol 2021. [DOI: 10.1016/j.jid.2021.02.025] [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]
|
8
|
He C, Qi R, Gao X. 481 Secukinumab rapidly alleviates fever and skin lesions in an erythrodermic psoriasis patient - A case report. J Invest Dermatol 2021. [DOI: 10.1016/j.jid.2021.02.505] [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: 11/25/2022]
|
9
|
Zhu P, Qi R, Chen H, Gao X. 623 Hyperthermia-induced plasma membrane translocation of aryl hydrocarbon receptor promotes phosphorylation of EGFR in human keratinocytes. J Invest Dermatol 2021. [DOI: 10.1016/j.jid.2021.02.652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
10
|
Feng Y, Qi R, Wu Y, Gao X, Chen H. 553 Herpes simplex virus type 1 infects melanocytes. J Invest Dermatol 2021. [DOI: 10.1016/j.jid.2021.02.580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
11
|
Qi R, Wang DT, Xing LF, Wu ZJ. miRNA-21 promotes gastric cancer growth by adjusting prostaglandin E2. Eur Rev Med Pharmacol Sci 2019; 22:1929-1936. [PMID: 29687845 DOI: 10.26355/eurrev_201804_14717] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE It is to study the stimulation and possible active mechanism of miRNA-21 on AGS proliferation of gastric cancer. MATERIALS AND METHODS AGS gastric cancer cells were cultivated in vitro and then divided into the blank control group, the PGE2 (prostaglandin E2) group, the anti-miRNA-21 group and the PGE2 + anti-miRNA-21 group and the MTT and the flow cytometry methods were adopted to test the effect of PGE2 or/and anti-miRNA-21 intervention on AGS cell proliferation and apoptosis and the differences to miRNA-21 expression. In addition, the cells were also divided into the blank control group, the PGE2 group, the PGE2 + Perifosine group, the PGE2 + anti-miRNA-21 group and the PGE2 + anti-miRNA-21 + Perifosine group and the MTT and flow cytometry methods were adopted to test the effect of Perifosine intervention on AGS cell proliferation and apoptosis and on PTEN and p-AktmRNA and protein expressions. RESULTS Compared with the control group, AGS cell proliferation activity increased significantly, the apoptosis rate decreased and the miRNA-21tmRNA and protein expression increased in the PGE2 group (p < 0.05); compared with the PGE2 group, the AGS cell proliferation rate decreased, the apoptosis rate increased and the miRNA-21mRNA and protein expressions decreased (p < 0.05) in the anti-miRNA-21 group and the PGE2 + anti-miRNA-21 group. In addition, after intervention of Perifosine, the AGS cell proliferation rate decreased, the apoptosis rate increased, the PTEN mRNA and protein expressions increased and the pAktmRNA and protein expressions decreased (p < 0.05). CONCLUSIONS miRNA-21 may promote the growth of gastric cancer cells by adjusting and controlling PTEN/Akt signal passage mediated PEG2.
Collapse
Affiliation(s)
- R Qi
- Department of Cardiothoracic Surgery, Inner Mongolia People's Hospital, Hohhot, Inner Mongolia, China.
| | | | | | | |
Collapse
|
12
|
Sun Q, Qing W, Qi R, Zou M, Gong L, Liu Y, Li DWC. Inhibition of Sumoylation Alleviates Oxidative Stress-induced Retinal Pigment Epithelial Cell Senescence and Represses Proinflammatory Gene Expression. Curr Mol Med 2019; 18:575-583. [PMID: 30621561 DOI: 10.2174/1566524019666190107154250] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Revised: 11/13/2018] [Accepted: 12/11/2018] [Indexed: 11/22/2022]
Abstract
PURPOSE Advanced age is the largest risk factor for age-related macular degeneration (AMD). Sumoylation is a reversible post-translational modification that conjugates small peptide, small ubiquitin-like modifier (SUMO), to a target protein. Dysregulation of sumoylation is recently found to be critically involved in several age-related disorders. However, the effects of sumoylation during retina senescence and aging remains elusive. This study is aimed to investigate the function and regulation of sumoylation pathway in the aging retina and premature senescent retinal pigment epithelial (RPE) cells. METHODS 1.5- and 10-month C57/B6 mice were used for comparative aging study. Both ARPE primary cultures and ARPE-19 cells were used for assay systems. The qRT-PCR was used for analysis of mRNA expression. Western blot and immunofluorescence were used to analyze the protein expression. Cell flow cytometry was used for cell cycle progression analysis. RPE barrier function and senescent-associated β-galactosidase (SA β-gal) activity were analyzed to measure cellular senescence. RESULTS We show that the expression of SUMO enzymes and global protein sumoylation were downregulated in the aging mouse retina, and in the oxidative stress (OS) -induced premature senescent RPE cells. Dramatical altered distribution of SUMO E1, E2 and E3 enzymes were observed during RPE senescence. Inhibition of sumoylation alleviated OS-induced cell senescence in RPE cells, as indicated by decreased p21 and p53 expression and decreased percentage of cell cycle arrest at G0/G1 phase. Intriguingly, inhibition of SUMO E1 repressed the expression of proinflammatory cytokine and chemokine in the premature senescent RPE cells. However, inhibition of sumoylation did not prevent DNA damage during the OS-induced RPE senescence process. CONCLUSIONS Our data indicate sumoylation critically regulates retina and RPE aging and that targeting sumoylation process may provide potential therapeutic strategy for AMD treatment.
Collapse
Affiliation(s)
- Q Sun
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China
| | - W Qing
- Key Laboratory of Protein Chemistry and Developmental Biology, College of Life Sciences, Hunan Normal University, Changsha, China
| | - R Qi
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China
| | - M Zou
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China
| | - L Gong
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China
| | - Y Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China
| | - D W-C Li
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou 510060, China.,Key Laboratory of Protein Chemistry and Developmental Biology, College of Life Sciences, Hunan Normal University, Changsha, China
| |
Collapse
|
13
|
Qi R, Lei CG, Bai YX, Xing X. [Mechanism of angiotensin II (Ang II) on the proliferation of human hepatoma cell line HepG2 cells]. Zhonghua Gan Zang Bing Za Zhi 2019; 26:601-606. [PMID: 30317792 DOI: 10.3760/cma.j.issn.1007-3418.2018.08.008] [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] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To study the effect and mechanism of angiotensin (Ang II) on the proliferation of human hepatocellular carcinoma HepG2 cells. Methods: The effects of different concentrations of Ang II's (10(-8)-10(-4) mol/L) on proliferated hepatocellular carcinoma HepG2 cells were detected by CCK-8 assay. The expression of angiotensin II type 1 receptor (AT1) protein and activation of ERK1/2 protein in hepatocellular carcinoma HepG2 cells after processing with Ang II were assayed by Western blot. The cells were pretreated with candesartan (AT1 receptor antagonist), sorafenib (Raf kinase inhibitor) and PD98059 (ERK1/2 inhibitor) for 1.5 h and then Ang II (10(-6) mol/L) was added. CCK-8 assay was used to determine whether it could reverse the proliferation of Ang II, and ERK phosphorylation levels were detected by Western blot. The changes in Bcl-2 and c-myc gene expression before and after Ang II processing were detected by Rt-PCR. According to different data, t-test, one-way analysis of variance or SNK method were used for statistical analysis. Results: HepG2 cells treated with different concentrations of Ang II promoted cell proliferation after 24h and 48h. After 24 h, cell vitality was strongest with Ang II concentration 10(-5) mol/L and the absorbance value was 0.990 8±0.097 8; and again after 48 h, the cell viability was strongest with Ang II concentration 10(-6) mol/L and the absorbance value was 1.302 7 ± 0.030 9. Moreover, the pro-proliferation effect of Ang II on HepG2 cells blocked candesartan, sorafenib and ERK1/2 isolated inhibitors. After treatment with 10(-6) mol/L Ang II, Western blot showed that Ang II significantly promoted AT1 receptor expression and phosphorylation of ERK1/2 protein confirmed that Ang II activated the AT1/RAF/ERK1/2 signaling pathway. In addition, Rt-PCR detection showed that the downstream of Bcl-2 and c-myc genes expressions rose significantly when the concentration of Ang II ranged from 10(-8) to 10(-6) mol/L. Conclusion: Ang II can promote the proliferation of HepG2 cells by activating AT1/Raf /ERK1/2 signaling pathway and enhance the downstream of Bcl-2 and c-myc gene expression.
Collapse
Affiliation(s)
- R Qi
- Youyi Hospital, Dalian Medical University, Dalian 116000, China
| | - C G Lei
- Department of Hepabilary Surgery, Qingdao Muliciple Hosptisal, Qingdao 266071, China
| | - Y X Bai
- Xinhua Hospital, Dalian Medical University, Dalian 116000, China
| | - X Xing
- Department of Hepabilary Surgery, Qingdao Muliciple Hosptisal, Qingdao 266071, China
| |
Collapse
|
14
|
Qi R, Lei CG, Bai YX, Tang N, Xing X. The AT1/Raf/ERK1/2 signaling pathway is involved in Angiotensin II-enhanced proliferation of hepatic carcinoma cells. Neoplasma 2019; 66:83-91. [DOI: 10.4149/neo_2018_171213n816] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 07/04/2018] [Indexed: 11/08/2022]
|
15
|
Tian H, Cong P, Qi R, Gao X, Liu X, Liu H, Shan F. Decreased invasion ability of hypotaurine synthesis deficient glioma cells was partially due to hypomethylation of Wnt5a promoter. BIOCELL 2018. [DOI: 10.32604/biocell.2017.00027] [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: 11/15/2022]
|
16
|
Han HJ, Wen HL, Zhao L, Liu JW, Luo LM, Zhou CM, Qin XR, Zhu YL, Liu MM, Qi R, Li WQ, Yu H, Yu XJ. Novel coronaviruses, astroviruses, adenoviruses and circoviruses in insectivorous bats from northern China. Zoonoses Public Health 2017; 64:636-646. [PMID: 28371451 PMCID: PMC7165899 DOI: 10.1111/zph.12358] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [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: 11/17/2016] [Indexed: 11/29/2022]
Abstract
Bats are considered as the reservoirs of several emerging infectious disease, and novel viruses are continually found in bats all around the world. Studies conducted in southern China found that bats carried a variety of viruses. However, few studies have been conducted on bats in northern China, which harbours a diversity of endemic insectivorous bats. It is important to understand the prevalence and diversity of viruses circulating in bats in northern China. In this study, a total of 145 insectivorous bats representing six species were collected from northern China and screened with degenerate primers for viruses belonging to six families, including coronaviruses, astroviruses, hantaviruses, paramyxoviruses, adenoviruses and circoviruses. Our study found that four of the viruses screened for were positive and the overall detection rates for astroviruses, coronaviruses, adenoviruses and circoviruses in bats were 21.4%, 15.9%, 20% and 37.2%, respectively. In addition, we found that bats in northern China harboured a diversity of novel viruses. Common Serotine (Eptesicus serotinu), Fringed long‐footed Myotis (Myotis fimriatus) and Peking Myotis (Myotis pequinius) were investigated in China for the first time. Our study provided new information on the ecology and phylogeny of bat‐borne viruses.
Collapse
Affiliation(s)
- H-J Han
- School of Public Health, Shandong University, Jinan, Shandong, China
| | - H-L Wen
- School of Public Health, Shandong University, Jinan, Shandong, China
| | - L Zhao
- School of Public Health, Shandong University, Jinan, Shandong, China
| | - J-W Liu
- School of Public Health, Shandong University, Jinan, Shandong, China
| | - L-M Luo
- Shandong Center for Disease Control and Prevention, Jinan, Shandong, China
| | - C-M Zhou
- School of Public Health, Shandong University, Jinan, Shandong, China
| | - X-R Qin
- School of Public Health, Shandong University, Jinan, Shandong, China
| | - Y-L Zhu
- School of Public Health, Shandong University, Jinan, Shandong, China
| | - M-M Liu
- School of Public Health, Shandong University, Jinan, Shandong, China
| | - R Qi
- School of Public Health, Shandong University, Jinan, Shandong, China
| | - W-Q Li
- School of Public Health, Shandong University, Jinan, Shandong, China
| | - H Yu
- Schools of Medicine, Fudan University, Shanghai, China
| | - X-J Yu
- Wuhan University School of Health Sciences, Wuhan, Hubei, China.,Departments of Pathology and Microbiology and Immunology, University of Texas Medical Branch, Galveston, TX, USA
| |
Collapse
|
17
|
Gong L, Qi R, Li D. Sumoylation Pathway as Potential Therapeutic Targets in Cancer. Curr Mol Med 2017; 16:900-905. [DOI: 10.2174/1566524016666161223105201] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2016] [Revised: 10/29/2016] [Accepted: 12/01/2016] [Indexed: 11/22/2022]
|
18
|
Yu M, Qi R, Chen C, Yin J, Ma S, Shi W, Wu Y, Ge J, Jiang Y, Tang L, Xu Y, Li Y. Immunogenicity of recombinantLactobacillus casei-expressing F4 (K88) fimbrial adhesin FaeG in conjunction with a heat-labile enterotoxin A (LTAK63) and heat-labile enterotoxin B (LTB) of enterotoxigenicEscherichia colias an oral adjuvant in mice. J Appl Microbiol 2016; 122:506-515. [DOI: 10.1111/jam.13352] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 11/01/2016] [Accepted: 11/13/2016] [Indexed: 12/01/2022]
Affiliation(s)
- M. Yu
- College of Veterinary Medicine; Northeast Agricultural University; Harbin China
| | - R. Qi
- College of Veterinary Medicine; Northeast Agricultural University; Harbin China
| | - C. Chen
- College of Veterinary Medicine; Northeast Agricultural University; Harbin China
| | - J. Yin
- College of Veterinary Medicine; Northeast Agricultural University; Harbin China
| | - S. Ma
- College of Veterinary Medicine; Northeast Agricultural University; Harbin China
| | - W. Shi
- College of Veterinary Medicine; Northeast Agricultural University; Harbin China
| | - Y. Wu
- College of Veterinary Medicine; Northeast Agricultural University; Harbin China
| | - J. Ge
- College of Veterinary Medicine; Northeast Agricultural University; Harbin China
| | - Y. Jiang
- College of Veterinary Medicine; Northeast Agricultural University; Harbin China
| | - L. Tang
- College of Veterinary Medicine; Northeast Agricultural University; Harbin China
| | - Y. Xu
- College of Veterinary Medicine; Northeast Agricultural University; Harbin China
| | - Y. Li
- College of Veterinary Medicine; Northeast Agricultural University; Harbin China
| |
Collapse
|
19
|
Wang WT, Li WT, Liu JS, Zhang ZJ, Qi R, Yu CH, Liu JQ, Fang M, Qin ZY, Wang C, Xu Y, Wu FX, Leng YX, Li RX, Xu ZZ. High-Brightness High-Energy Electron Beams from a Laser Wakefield Accelerator via Energy Chirp Control. Phys Rev Lett 2016; 117:124801. [PMID: 27689280 DOI: 10.1103/physrevlett.117.124801] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Indexed: 06/06/2023]
Abstract
By designing a structured gas density profile between the dual-stage gas jets to manipulate electron seeding and energy chirp reversal for compressing the energy spread, we have experimentally produced high-brightness high-energy electron beams from a cascaded laser wakefield accelerator with peak energies in the range of 200-600 MeV, 0.4%-1.2% rms energy spread, 10-80 pC charge, and ∼0.2 mrad rms divergence. The maximum six-dimensional brightness B_{6D,n} is estimated as ∼6.5×10^{15} A/m^{2}/0.1%, which is very close to the typical brightness of e beams from state-of-the-art linac drivers. These high-brightness high-energy e beams may lead to the realization of compact monoenergetic gamma-ray and intense coherent x-ray radiation sources.
Collapse
Affiliation(s)
- W T Wang
- State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
| | - W T Li
- State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
| | - J S Liu
- State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
- Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Z J Zhang
- State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
| | - R Qi
- State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
| | - C H Yu
- State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
| | - J Q Liu
- State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
| | - M Fang
- State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Z Y Qin
- State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
| | - C Wang
- State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Y Xu
- State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
| | - F X Wu
- State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Y X Leng
- State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
| | - R X Li
- State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
- Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai 200240, China
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, China
| | - Z Z Xu
- State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
- Collaborative Innovation Center of IFSA, Shanghai Jiao Tong University, Shanghai 200240, China
- School of Physical Science and Technology, ShanghaiTech University, Shanghai 200031, China
| |
Collapse
|
20
|
Qi R, Parikh C, Luchetti A, Mandelman D, Latif H, Harris A, Ghosh S. Speeding up the S5 XL sequencing system: Sequencing in an hour enables sample to answer in a 8 hr workday. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)61504-6] [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]
|
21
|
Qi R, Liu C, Ke J, Xu Q, Ye Y, Jia L, Wang F, Zhang LJ, Lu GM. Abnormal Amygdala Resting-State Functional Connectivity in Irritable Bowel Syndrome. AJNR Am J Neuroradiol 2016; 37:1139-45. [PMID: 26767708 DOI: 10.3174/ajnr.a4655] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2015] [Accepted: 11/16/2015] [Indexed: 01/18/2023]
Abstract
BACKGROUND AND PURPOSE Functional neuroimaging studies in irritable bowel syndrome have revealed abnormalities in the corticolimbic regions, specifically, hyperactivity of the amygdala during visceral and somatic stimulation. This study investigated changes in the neural circuitry of the amygdala in patients with irritable bowel syndrome based on resting-state functional connectivity. MATERIALS AND METHODS Functional MR imaging data were acquired from 31 patients with irritable bowel syndrome and 32 healthy controls (matched for age, sex, and educational level) during rest, and the resting-state functional connectivity of bilateral amygdalae was compared. Multiple regression was performed to investigate the relationship between clinical indices of patients with irritable bowel syndrome and resting-state functional connectivity. RESULTS Compared with healthy controls, patients with irritable bowel syndrome had higher positive resting-state functional connectivity between the amygdala and insula, midbrain, parahippocampal gyrus, pre- and postcentral gyri, and supplementary motor area. The inclusion of anxiety and depression as covariates did not alter amygdala resting-state functional connectivity differences between the study groups. Multiple covariate regression results showed that the pain intensity in patients with irritable bowel syndrome positively correlated with resting-state functional connectivity between the amygdala and supplementary motor area, pre- and postcentral gyri, and insula, while the Irritable Bowel Syndrome-Symptom Severity Score positively correlated with resting-state functional connectivity between the amygdala and insula and midbrain. CONCLUSIONS Patients with irritable bowel syndrome showed disturbed amygdala resting-state functional connectivity with the corticolimbic regions, which could partly account for the enhanced emotional arousal and visceral information processing associated with irritable bowel syndrome.
Collapse
Affiliation(s)
- R Qi
- From the Departments of Medical Imaging (R.Q., J.K., Q.X., L.J.Z., G.M.L.)
| | - C Liu
- Gastroenterology (C.L., Y.Y., F.W.)
| | - J Ke
- From the Departments of Medical Imaging (R.Q., J.K., Q.X., L.J.Z., G.M.L.)
| | - Q Xu
- From the Departments of Medical Imaging (R.Q., J.K., Q.X., L.J.Z., G.M.L.)
| | - Y Ye
- Gastroenterology (C.L., Y.Y., F.W.)
| | - L Jia
- Emergency Medicine (L.J.), Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, China
| | - F Wang
- Gastroenterology (C.L., Y.Y., F.W.)
| | - L J Zhang
- From the Departments of Medical Imaging (R.Q., J.K., Q.X., L.J.Z., G.M.L.)
| | - G M Lu
- From the Departments of Medical Imaging (R.Q., J.K., Q.X., L.J.Z., G.M.L.)
| |
Collapse
|
22
|
Ke J, Qi R, Liu C, Xu Q, Wang F, Zhang L, Lu G. Abnormal regional homogeneity in patients with irritable bowel syndrome: A resting-state functional MRI study. Neurogastroenterol Motil 2015; 27:1796-803. [PMID: 26403620 DOI: 10.1111/nmo.12692] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 08/26/2015] [Indexed: 12/13/2022]
Abstract
BACKGROUND Task-related brain imaging research has implicated abnormal central processing of visceral sensation in irritable bowel syndrome (IBS). However, how brain function of IBS patients is altered during resting-state remains to be determined. We investigated spontaneous brain activity of patients with IBS using regional homogeneity (ReHo) analysis in resting-state functional magnetic resonance imaging (rs-fMRI). METHODS Thirty-one patients with diarrhea-predominant IBS and 32 age- and sex- matched healthy controls underwent clinical assessments and rs-fMRI scanning. ReHo maps were acquired by calculating the Kendall's coefficient of concordance and compared between the IBS group and the control group. The effects of psychological disturbance on group differences were assessed by including anxiety and depression levels as covariates in the statistical analyses. Multiple regression analyses were conducted to examine the relationship between ReHo values and disease duration, symptom severity, and pain intensity. KEY RESULTS Compared with controls, IBS patients showed increased ReHo in the postcentral gyrus and thalamus and decreased ReHo in the anterior cingulate cortex and prefrontal cortex. The inclusion of anxiety and depression as covariates did not alter ReHo differences between the two groups. Furthermore, significant correlations were found between clinical indices and ReHo values in some brain regions in the IBS group. CONCLUSIONS & INFERENCES IBS patients have abnormal local synchronization of spontaneous brain activity in regions involved in visceral afferent processing, emotional arousal, and cognitive modulation. Combining rs-fMRI and ReHo analysis seems to be a valuable approach to investigate the neural basis of IBS.
Collapse
Affiliation(s)
- J Ke
- Department of Medical Imaging, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, China
| | - R Qi
- Department of Medical Imaging, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, China
| | - C Liu
- Department of Gastroenterology, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, China
| | - Q Xu
- Department of Medical Imaging, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, China
| | - F Wang
- Department of Gastroenterology, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, China
| | - L Zhang
- Department of Medical Imaging, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, China
| | - G Lu
- Department of Medical Imaging, Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu, China
| |
Collapse
|
23
|
Cui Z, Zhao P, Jia C, Liu H, Qi R, Cui J, Cui J, Peng Q, Lin B, Rao Y. Local expression and role of BMP-2/4 in injured spinal cord. Genet Mol Res 2015; 14:9109-17. [DOI: 10.4238/2015.august.7.20] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
24
|
Xu L, Wang C, Shen WW, Qi R. [Effects of simvastatin nano-liposomes on osteogenic differentiation of bone marrow stromal cells]. Beijing Da Xue Xue Bao Yi Xue Ban 2014; 46:883-888. [PMID: 25512277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To investigate the effects of liposomal formulation on simvastatin nano-liposomes (SMV-liposome) promoting the osteogenic differentiation of mice bone marrow stromal cells (BMSC) analyzed by the expressions of bone morphogenetic protein 2 (BMP-2) and alkaline phosphatase (ALP). METHODS Primary BMDC were cultured in vitro using adherence and culture of whole bone marrow method. SMV dosage was set as control group and had two different dosages in this group on the basis of the concentration of SMV. 1 μmol/L and 2 μmol/L SMV concentration were represented by SMV low dosage group (S1) and SMV high dosage group (S2), respectively. Similarly, SMV-liposome dosage was set as experimental group including two different dosages, 1 μmol/L SMV capsuled concentration as SMV-liposome low dosage group (SL1) and 2 μmol/L SMV capsuled concentration as SMV-liposome high dosage group (SL2). Besides, groups with no drug intervention in the experiments were set as blank. BMSC were treated with different concentrations of SMV and SMV-liposome for 48 h, the activity of ALP was measured using p-nitropheny-phosate method, and ALP expression in the BMSC cells was stained by BCIP/NBT alkaline phosphatase color development kit (BCIP/NBT Kit). Furthermore, BMP-2 expression in the BMSC was determined by Western Blot. RESULTS MTT assay showed, after incubated with different concentrations of SMV and SMV-liposome, the cell viabilities of BMSC were all above 85% and had no significant difference in the groups. Compared with the same dosage of SMV in these groups, control group and experimental group had significantly elevated the specific activity of ALP, the staining of BCIP/NBTKit as well as the protein expression of BMP-2. Besides, the data showed dose-dependent elevation in the control group and experimental group, namely the high dose group had better results than the low dose group. CONCLUSION Nano-liposomal formulation significantly enhanced SMV effects on the osteogenetic differentiation of BMSC.
Collapse
Affiliation(s)
- L Xu
- Institute of Cardiovascular Sciences,Peking University;Key Laboratory of Molecular Cardiovascular Sciences,Ministry of Education,Beijing 100191,China
| | - C Wang
- Institute of Cardiovascular Sciences,Peking University;Key Laboratory of Molecular Cardiovascular Sciences,Ministry of Education,Beijing 100191,China
| | - W W Shen
- Institute of Cardiovascular Sciences,Peking University;Key Laboratory of Molecular Cardiovascular Sciences,Ministry of Education,Beijing 100191,China
| | - R Qi
- Institute of Cardiovascular Sciences,Peking University;Key Laboratory of Molecular Cardiovascular Sciences,Ministry of Education,Beijing 100191,China
| |
Collapse
|
25
|
Qi R, Yu JQ, Zhou XP, Li ZL. The superior aspect of the perirenal space: could it be depicted by dual-source CT in vivo in adults. Br J Radiol 2014; 88:20140480. [PMID: 25411900 DOI: 10.1259/bjr.20140480] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVE This study aims to observe whether the renal fascias could be effectively shown by dual-source CT (DSCT) and to explore the superior communication of the perirenal space (PS) in vivo in adults. METHODS 275 cases were included in the normal group and 124 cases in the acute pancreatitis group in this study; all images obtained by DSCT were observed; the superior adherence of the renal fascias and the pattern of superior communication of the PS were judged; and the consistency between the two groups was compared. RESULTS The superior adherence of the renal fascias was reliably displayed in 57.8% of the normal group and 69.4% of the acute pancreatitis group, the anterior renal fascia (ARF) did not fuse with the posterior renal fascia superiorly. The left ARF fused with the posterior parietal peritoneum in 57.9% of the normal group and 45.3% of the pancreatitis group, where the left PS communicated with the subdiaphragmatic retroperitoneal space (SDRS). The left ARF fused with the peritoneum laterally and simultaneously with the inferior phrenic fascia medially in 42.1% and 54.7% of each group, respectively, where the left PS was open towards the SDRS laterally but sealed off from the SDRS medially. The right ARF fused with the peritoneum in all cases; and the right PS was open towards the bare area of the liver. CONCLUSION To some extent, DSCT can display renal fascia and its superior adherence and reflect the superior communication of the PS. ADVANCES IN KNOWLEDGE This study was conducted in vivo in adults by high-resolution DSCT, and more samples could be provided.
Collapse
Affiliation(s)
- R Qi
- Department of Radiology, West China Hospital, Sichuan University, Chengdu, China
| | | | | | | |
Collapse
|
26
|
Jin C, Qi R, Yin Y, Hu X, Duan L, Xu Q, Zhang Z, Zhong Y, Feng B, Xiang H, Gong Q, Liu Y, Lu G, Li L. Abnormalities in whole-brain functional connectivity observed in treatment-naive post-traumatic stress disorder patients following an earthquake. Psychol Med 2014; 44:1927-1936. [PMID: 24168716 DOI: 10.1017/s003329171300250x] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND Convergent studies have highlighted the dysfunction of the amygdala, prefrontal cortex and hippocampus in post-traumatic stress disorder (PTSD). However, only a few studies have investigated the functional connectivity between brain regions in PTSD patients during the resting state, which may improve our understanding of the neuropathophysiology of PTSD. The aim of this study was to investigate patterns of whole-brain functional connectivity in treatment-naive PTSD patients without co-morbid conditions who experienced the 8.0-magnitude earthquake in the Sichuan province of China. METHOD A total of 72 PTSD patients and 86 trauma-exposed non-PTSD controls participated in the resting-state functional magnetic resonance imaging study. All these subjects were recruited from the disaster zone of the 2008 Sichuan earthquake. Functional connectivities between 90 paired brain regions in PTSD patients were compared with those in trauma-exposed non-PTSD controls. Furthermore, Pearson correlation analysis was performed between significantly abnormal connectivities in PTSD patients and their clinician-administered PTSD scale (CAPS) scores. RESULTS Compared with non-PTSD controls, PTSD patients showed weaker positive connectivities between the middle prefrontal cortex (mPFC) and the amygdala, hippocampus, parahippocampal gyrus and rectus, as well as between the inferior orbitofrontal cortex and the hippocampus. In addition, PTSD patients showed stronger negative connectivity between the posterior cingulate cortex (PCC) and the insula. The CAPS scores in PTSD patients correlated negatively with the connectivity between the amygdala and the mPFC. CONCLUSIONS PTSD patients showed abnormalities in whole-brain functional connectivity, primarily affecting the connectivities between the mPFC and limbic system, and connectivity between the PCC and insula.
Collapse
Affiliation(s)
- C Jin
- Mental Health Institute,The Second Xiangya Hospital of Central South University,Hunan,People's Republic of China
| | - R Qi
- Department of Medical Imaging, Jinling Hospital, Clinical School of Medical College,Nanjing University,Nanjing.People's Republic of China
| | - Y Yin
- Mental Health Institute,The Second Xiangya Hospital of Central South University,Hunan,People's Republic of China
| | - X Hu
- Mental Health Institute,The Second Xiangya Hospital of Central South University,Hunan,People's Republic of China
| | - L Duan
- Mental Health Institute,The Second Xiangya Hospital of Central South University,Hunan,People's Republic of China
| | - Q Xu
- Department of Medical Imaging, Jinling Hospital, Clinical School of Medical College,Nanjing University,Nanjing.People's Republic of China
| | - Z Zhang
- Department of Medical Imaging, Jinling Hospital, Clinical School of Medical College,Nanjing University,Nanjing.People's Republic of China
| | - Y Zhong
- Department of Medical Imaging, Jinling Hospital, Clinical School of Medical College,Nanjing University,Nanjing.People's Republic of China
| | - B Feng
- Mianzhu Psychiatric Hospital,Erhuan Road and Mianzun Road, Deyang, Sichuan,People's Republic of China
| | - H Xiang
- Mental Health Center of Sichuan Province, Mianyang, Sichuan,People's Republic of China
| | - Q Gong
- Huaxi MR Research Center, Department of Radiology,West China Hospital of Sichuan University,Chengdu, Sichuan,People's Republic of China
| | - Y Liu
- Department of Psychiatry,University of Florida,Gainesville, FL,USA
| | - G Lu
- Department of Medical Imaging, Jinling Hospital, Clinical School of Medical College,Nanjing University,Nanjing.People's Republic of China
| | - L Li
- Mental Health Institute,The Second Xiangya Hospital of Central South University,Hunan,People's Republic of China
| |
Collapse
|
27
|
Yu SY, Qi R, Zhao H. Losartan reverses glomerular podocytes injury induced by AngII via stabilizing the expression of GLUT1. Mol Biol Rep 2013; 40:6295-301. [PMID: 24062074 DOI: 10.1007/s11033-013-2742-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2013] [Accepted: 09/14/2013] [Indexed: 11/26/2022]
Abstract
Podocyte impairment is a key pathogenic even in the initiation and development of glomerular diseases associated with proteinuria. The type 2 diabetic patients is characterized by progressive increases in albuminuria which are associated with the development of characteristic histopathological features. Losartan had a benefit in decreasing albuminuria in type 2 diabetic patients,suggesting that losartan may have another effect other than blockade of the traditional renin-angiotensin system (RAS). However, the mechanism has remained undetermined. Glucose transporter 1 (GLUT1) is the predominant basal glucose transporter. In the kidney, GLUT1 was overexpressed predominantly in glomerular mesangial cells and in small vessels, rather than in podocytes. The increased glomerular GLUT1 mimicked diabetes-induced glomerular GLUT1 expression. In this study, we hypothesized that increased GLUT1 expression induced by angiotensinII (AngII) contributes to the progression of podocytes injury, losartan can block the effect of AngII and protect podocytes via stabilizing the expression of GLUT1, our results strongly suggest that losartan has a direct and protective effect on podocytes. This represents a novel mechanism by which losartan may protect podocyte from apoptotic death and improve podocyte function via stabilizing the expression of GLUT1. This finding underlines the crucial role of GLUT1 in the pathogenesis of podocyte injury and proteinuria.
Collapse
Affiliation(s)
- S Y Yu
- Guangzhou Medical University, Guangzhou First People's Hospital, Guangzhou, Guangdong Province, People's Republic of China,
| | | | | |
Collapse
|
28
|
Zhang HJ, Sun CH, Kuang HY, Jiang XY, Liu HL, Hua WF, Liu ZJ, Zhou H, Sui H, Qi R. 12S-hydroxyeicosatetraenoic acid levels link to coronary artery disease in Type 2 diabetic patients. J Endocrinol Invest 2013; 36:385-9. [PMID: 23095287 DOI: 10.3275/8654] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
BACKGROUND 12(S)-Hydroxyeicosatetraenoic acid (12(S)-HETE) is a metabolite of arachidonic acid. 12(S)-HETE is involved in the pathogenesis of atherosclerosis and diabetes. However, the correlation between 12(S)-HETE and coronary artery disease (CAD) in the diabetic patient is unclear. AIMS The study investigated the relationship between 12(S)-HETE and CAD in Type 2 diabetes (T2D). METHODS Plasma 12(S)- HETE levels were detected by enzyme-linked immunosorbent assay in 103 healthy controls (control), 109 diabetic patients without CAD (diabetic), and 152 diabetic patients with CAD (diabetic-CAD). RESULTS 12(S)-HETE levels were higher in both diabetic and diabetic-CAD groups compared to control and in the diabetic-CAD group compared to the diabetic group. In the multiple linear stepwise regression analysis, 12(S)-HETE levels correlated independently with CAD, systolic blood pressure, and glycated hemoglobin. CONCLUSIONS These results indicate that 12(S)-HETE levels are increased in diabetic patients with CAD, suggesting a role for atherosclerosis in T2D.
Collapse
Affiliation(s)
- H J Zhang
- Department of Endocrinology, First Affiliated Hospital of Harbin Medical University, Harbin, China
| | | | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Qi R, Sun C, Yang H, Zhao X, Tao Z. The molecular mechanism of fat accumulation
changes in Black-Bone chickens with different
energy intakes. J Anim Feed Sci 2012. [DOI: 10.22358/jafs/66092/2012] [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: 11/27/2022]
|
30
|
Joglekar MV, Quintana Diez PM, Marcus S, Qi R, Espinasse B, Wiesner MR, Pempe E, Liu J, Monroe DM, Arepally GM. Disruption of PF4/H multimolecular complex formation with a minimally anticoagulant heparin (ODSH). Thromb Haemost 2012; 107:717-25. [PMID: 22318669 DOI: 10.1160/th11-11-0795] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Accepted: 12/24/2011] [Indexed: 11/05/2022]
Abstract
Recent studies have shown that ultra-large complexes (ULCs) of platelet factor 4 (PF4) and heparin (H) play an essential role in the pathogenesis of heparin-induced thrombocytopenia (HIT), an immune-mediated disorder caused by PF4/H antibodies. Because antigenic PF4/H ULCs assemble through non-specific electrostatic interactions, we reasoned that disruption of charge-based interactions can modulate the immune response to antigen. We tested a minimally anticoagulant compound (2-O, 3-O desulfated heparin, ODSH) with preserved charge to disrupt PF4/H complex formation and immunogenicity. We show that ODSH disrupts complexes when added to pre-formed PF4/H ULCs and prevents ULC formation when incubated simultaneously with PF4 and UFH. In other studies, we show that excess ODSH reduces HIT antibody (Ab) binding in immunoassays and that PF4/ODSH complexes do not cross-react with HIT Abs. When ODSH and unfractionated heparin (UFH) are mixed at equimolar concentrations, we show that there is a negligible effect on amount of protamine required for heparin neutralisation and reduced immunogenicity of PF4/UFH in the presence of ODSH. Taken together, these studies suggest that ODSH can be used concurrently with UFH to disrupt PF4/H charge interactions and provides a novel strategy to reduce antibody mediated complications in HIT.
Collapse
Affiliation(s)
- M V Joglekar
- Division of Hematology, Duke University Medical Center, Durham, North Carolina, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Raleigh VS, Hussey D, Seccombe I, Qi R. Do associations between staff and inpatient feedback have the potential for improving patient experience? An analysis of surveys in NHS acute trusts in England. Qual Saf Health Care 2011; 18:347-54. [PMID: 19812096 DOI: 10.1136/qshc.2008.028910] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
OBJECTIVE To examine whether staff feedback on quality, safety and workforce issues is reflected in patient-reported experience. SETTING 166 NHS acute trusts in England. PARTICIPANTS Respondents to the 2006 surveys of adult inpatients and staff in 166 NHS acute trusts in England. METHODS Multiple linear regression was used to model the relationship between responses by "frontline" staff and inpatients at trust level. Staff survey items were the explanatory variables and inpatient responses the dependent variables. Adjustments were made for location (London and non-London) and trust type. RESULTS 69 500 staff and 81 000 patients responded to the surveys. There were several significant associations between staff and patients' responses, including that staff availability of hand-washing materials was positively associated with patient feedback on cleanliness and hand washing by doctors/nurses (p<0.00). It was a significant predictor of patient experience also in several other models. Other significant predictors of patient experience were managerial support, witnessing and reporting of errors (positively associated with patient experience), working extra hours and stress (negatively associated). London trusts performed worse on patient experience than trusts outside London and specialist trusts performed better than other acute trusts. CONCLUSIONS Staff feedback was associated with patient-reported experience. Positive staff feedback on availability of hand-washing materials was broadly reflective of positive patient experience. Negative staff experience was reflected in poorer patient experience and vice versa. Although we cannot demonstrate causality, the consistent direction of the findings is indicative of it. Management boards of trusts and clinicians and other staff should monitor and act on the results of their staff surveys. This has the potential for improving quality, safety and patient experience.
Collapse
Affiliation(s)
- V S Raleigh
- The King's Fund, 11-13 Cavendish Square, London W1G 0AN, UK.
| | | | | | | |
Collapse
|
32
|
Abstract
SUMMARY BACKGROUND Heparin-induced thrombocytopenia (HIT) is a life-threatening thrombotic illness caused by drug-dependent antibodies recognizing complexes of platelet factor 4 (PF4) and heparin. Little is known about the immune pathogenesis of HIT, in particular factors influencing PF4/heparin antibody formation. To gain insight into the biologic basis of heparin sensitization, we have recently developed an animal model using wild-type (WT) mice in which murine PF4/heparin antibodies (anti-mPF4/H) arise de novo after antigen challenge. OBJECTIVES AND METHODS This report describes technical refinements to the murine model and describes additional biologic features of the immune response to mPF4/heparin. RESULTS Our studies indicate that antibody responses to mPF4/heparin are dependent on murine strain, injection routes and doses of mPF4 and heparin. C57BL/6 mice are more immunologically responsive to mPF4/heparin antigen than BALB/c mice and robust immunization can be achieved with intravenous, but not intraperitoneal, administration of antigen. We also observe a direct relationship between initial concentrations of mPF4 and antibody levels. Additionally, we demonstrate that mPF4/H immune response in mice decays with time, is not associated with thrombocytopenia and displays characteristics of immune recall on re-exposure to antigen. CONCLUSIONS These studies describe and characterize a murine model for studying the immunologic basis of PF4/heparin sensitization.
Collapse
Affiliation(s)
- S Suvarna
- Division of Hematology, Duke University Medical Center, Durham, NC 27710, USA
| | | | | |
Collapse
|
33
|
Abstract
The preparation and characteristics of insulin enteric microspheres (EMS) were studied and the gastrointestinal absorption enhancement of insulin by co-administering EMS with sodium N-(8-[2-hydroxybenzoyl] amino) caprylate (SNAC) was determined. The w/o/w and o(1)/o(2) emulsion solvent evaporation methods were used to prepare insulin-hydroxypropyl methylcellulose phthalate (HPMCP) EMS. High-performance liquid chormatography determined the drug loading, entrapment efficiency, stability to pepsin, and drug dissolution rate in hydrochloric acid solution (pH 1.2) and phosphate buffer solution (pH 6.8). The hypoglycaemic effect was studied by orally administrating the insulin EMS and SNAC to rats. The particle size of EMS (o(1)/o(2)) and EMS (w/o/w) was about 500 and 30 micro m respectively, and drug loading was 7 and 3% respectively. After being incubated with 18 micro g/mL pepsin solution (pH 1) at 37 degrees C, only 20% of insulin in EMS (o(1)/o(2)) was digested within 4 h, while 60% of the insulin in EMS (w/o/w) was digested within 1 h. In hydrochloric acid solution (pH 1.2), EMS (o(1)/o(2)) had less drug dissolution than EMS (w/o/w). In phosphate buffer solution (pH 6.8), the entire drug release time of EMS (o(1)/o(2)) and EMS (w/o/w) was 75 and 10 min, respectively. After orally administering with SNAC, EMS (o(1)/o(2)) could decrease the blood glucose level of rats remarkably and maintain the hypoglycaemic effect for 4 h, while EMS (w/o/w) had just a weakly hypoglycaemic effect. The results showed that the characteristics-optimized EMS, i.e. EMS (o(1)/o(2)) incorporating SNAC, could enhance insulin absorption significantly in the gastrointestional tract by taking advantage of both protection from enzyme degradation and improvement of drug permeability.
Collapse
Affiliation(s)
- R Qi
- Department of Pharmaceutics, China Pharmaceutical University, Nanjing 210009, P. R. China
| | | |
Collapse
|
34
|
Morrell ED, Brown BP, Qi R, Drabiak K, Helft PR. The do-not-resuscitate order: associations with advance directives, physician specialty and documentation of discussion 15 years after the Patient Self-Determination Act. J Med Ethics 2008; 34:642-647. [PMID: 18757631 DOI: 10.1136/jme.2007.022517] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
BACKGROUND Since the passage of the Patient Self-Determination Act, numerous policy mandates and institutional measures have been implemented. It is unknown to what extent those measures have affected end-of-life care, particularly with regard to the do-not-resuscitate (DNR) order. METHODS Retrospective cohort study to assess associations of the frequency and timing of DNR orders with advance directive status, patient demographics, physician's specialty and extent of documentation of discussion on end-of-life care. RESULTS DNR orders were more frequent for patients on a medical service than on a surgical service (77.34% vs 64.20%, p = 0.02) and were made earlier in the hospital stay for medicine than for surgical patients (adjusted mean ratio of time from DNR orders to death versus total length of stay 0.30 for internists vs 0.21 for surgeons, p = 0.04). 22.18% of all patients had some form of an advance directive in their chart, yet this variable had no impact on the frequency or timing of DNR ordering. Documentation of DNR discussion was significantly associated with the frequency of DNR orders and the time from DNR to death (2.1 days with no or minimal discussion vs 2.8 days with extensive discussion, p<0.01). CONCLUSIONS The physician's specialty continues to have a significant impact on the frequency and timing of DNR orders, while advance directive status still has no measurable impact. Additionally, documentation of end-of-life discussions is significantly associated with varying DNR ordering rates and timing.
Collapse
Affiliation(s)
- E D Morrell
- Indiana University School ofMedicine, Indianapolis, Indiana 46202, USA
| | | | | | | | | |
Collapse
|
35
|
Shen H, Agarwal D, Qi R, Chalasani N, Liangpunsakul S, Lumeng L, Yoo H, Kwo P. Predictors of outcome in patients with unresectable hepatocellular carcinoma receiving transcatheter arterial chemoembolization. Aliment Pharmacol Ther 2007; 26:393-400. [PMID: 17635374 DOI: 10.1111/j.1365-2036.2007.03395.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
BACKGROUND Transcatheter arterial chemoembolization (TACE) has been shown to improve survival in patients with unresectable hepatocellular carcinoma (HCC). AIM To identify pretreatment factors that predicts increased mortality in HCC patients receiving TACE. METHODS Retrospective review of all patients who underwent TACE for HCC from January 1999 to November 2004. Patient demographics, aetiology of liver disease, laboratory and imaging data regarding tumour characteristics were obtained. RESULTS Eighty-eight patients (57 +/- 1 years age) received 1-4 sessions of TACE (1.4 +/- 0.1). Tumour size was 3.3 +/- 0.2 cm (range 1-13 cm, median 3 cm) with mean number of lesions 1.9 +/- 0.1 (range 1-7). Mean model for the end stage liver disease score: 11 +/- 0.4; cancer of the liver Italian program score: 1.3 +/- 0.1. Survival post-TACE (excluding those underwent orthotopic liver transplantation) was 12 +/- 0.3 months. By multivariate analysis, tumour size (HR = 1.37, 95% CI: 1.11-1.68, P = 0.003), hypovascularity (HR = 12.62, 95% CI: 1.79-88.92, P = 0.01) and elevated international normalized ratio (HR = 1.46, 95% CI: 1.10-1.92 P = 0.008) are shown to be significant risk factors for increased mortality. CONCLUSION TACE therapy leads to a mean survival of 12 months in patients not receiving orthotopic liver transplantation. Tumour size, hypovascularity on imaging, and elevated international normalized ratio are predictors of increased mortality after TACE therapy for HCC.
Collapse
Affiliation(s)
- H Shen
- Division of Gastroenterology/Hepatology, Department of Medicine, Indiana University, Indianapolis, IN 46202, USA
| | | | | | | | | | | | | | | |
Collapse
|
36
|
Helft PR, Qi R, Brown BP, Drabiak K, Morrell ED. DNR patterns in cancer patients (pts) 16 years after the Patient Self Determination Act (PSDA). J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.6582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
6582 Background: In 1991, the PSDA required institutions receiving federal funding to inform pts about the right to refuse life prolonging treatments such as CPR. Studies conducted around 1991 suggest that most DNR orders are written by oncologists less than 3 days prior to death in hospitalized pts, raising ethical concerns. 16 years later, are oncology clinicians writing DNR orders earlier in cancer pts’ hospital course compared to non-cancer pts? Methods: We conducted a chart review of 284 of the 296 total adult deaths during 2005 at Indiana University Hospital. Demographic, diagnostic, and attending service info was collected from hospital billing records. Pts’ DNR status, timing of DNR orders, and presence of a written advanced directive (AD) were assessed through chart review. Results: 76 of 284 (26.8%) patients had cancer diagnoses. Of these, 59 had documented DNR orders. There was no difference in presence or absence of DNR orders at the time of death for cancer vs. non-cancer pts (77.6 vs 72.7%, p=0.35). Mean time from writing of the DNR order to death was 3.51 ± 4.61 days for cancer pts compared to 3.26 ±3.81 days for non-cancer pts (p=0.40), however, the majority of DNR orders written by oncologists were written less than 2 days prior to death. We calculated a ratio of the time between DNR order writing and death to the overall length of stay for cancer and non-cancer pts, excluding pts with very short lengths of stay ( = 5 days). In univariate analyses, this ratio trended toward statistical significance (p=0.08). In multivariate analyses, cancer pts had a higher ratio of the time between DNR order and death to LOS (0.30 vs 0.21, p=0.05). Existence of an AD had no significant impact on this ratio. Surgical specialists wrote DNR orders less frequently (64.2 vs 77.3%, p=0.02) and later than non-surgical specialists (mean 21 vs 10 days from admission, p=0.0008). Conclusions: In this study, DNR ordering patterns among hospitalized cancer and non-cancer pts have changed little since the PSDA. Although cancer pts on average had DNR orders written relatively earlier in their terminal hospital stay than non-cancer pts, the timing varied little from pts in prior studies. Although the majority of hospitalized pts in this sample died with DNR orders, these orders were written very late in their hospital stay. No significant financial relationships to disclose.
Collapse
Affiliation(s)
| | - R. Qi
- Indiana University, Indianapolis, IN
| | | | | | | |
Collapse
|
37
|
Qi R, Gu J, Zhang Z, Yang K, Li B, Fan J, Wang C, He Z, Qiao L, Lin Z, Liu XY. Potent antitumor efficacy of XAF1 delivered by conditionally replicative adenovirus vector via caspase-independent apoptosis. Cancer Gene Ther 2006; 14:82-90. [PMID: 17008933 DOI: 10.1038/sj.cgt.7700992] [Citation(s) in RCA: 21] [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: 11/09/2022]
Abstract
XAF1 is a newly identified tumor-suppressor gene that can antagonize XIAP and sensitize cells to other cell death triggers. In this study, we utilized ZD55, a conditionally replicative adenovirus (CRAd) similar to ONYX-015 as the vector to transfer XAF1 into the tumor cells to evaluate its antitumor efficacy in vitro and in vivo. Potent and specific cytopathic effect (CPE) was observed upon infection with ZD55-XAF1 in tumor cell lines. Importantly, ZD55-XAF1 exhibited a superior suppression of tumor growth in an animal model of colorectal carcinoma in nude mice compared with Ad-XAF1 (E1-deleted replication-defective viral) and ONYX-015. Complete eradication of the established tumors was observed in four of eight mice. Our data also showed that infection with ZD55-XAF1 resulted in caspase-independent apoptosis. Although caspase-3, poly(ADP-ribose) polymerase were mildly activated in response to ZD55-XAF1 infection, pretreatment with pan-caspase inhibitor hardly influence its apoptosis-inducing activity. In summary, our study strongly suggested that ZD55-XAF1 could serve as an effective gene-virotherapy strategy and has highly potential against human cancers.
Collapse
Affiliation(s)
- R Qi
- Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Williams LS, Rotich J, Qi R, Fineberg N, Espay A, Bruno A, Fineberg SE, Tierney WR. Effects of admission hyperglycemia on mortality and costs in acute ischemic stroke. Neurology 2002; 59:67-71. [PMID: 12105309 DOI: 10.1212/wnl.59.1.67] [Citation(s) in RCA: 294] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
BACKGROUND Hyperglycemia at the time of acute ischemic stroke has been linked to worse outcome in both human and animal studies. OBJECTIVE To describe the prevalence and severity of hyperglycemia on hospital admission among acute ischemic stroke patients, to examine the independent relationship of admission hyperglycemia to all-cause mortality, and to document the inpatient management of hyperglycemia. METHODS Patients hospitalized with acute ischemic stroke at one hospital from July 1993 to June 1998 (n = 656) were identified. Demographic data, diagnoses, and blood glucose (BG) values were retrieved from the electronic medical record system. Admission stroke severity, fingerstick BG results, and new diabetes diagnoses were obtained by chart review. Hyperglycemia was defined as admitting random serum BG > or = 130 mg/dL. Hazard ratios (HR) for 30-day, 1-year, and 6-year mortality were calculated using multivariable Cox regression models. RESULTS Hyperglycemia at admission to hospital was present in 40% of patients with acute stroke. Patients with hyperglycemia were more often women and more likely to have prior diagnoses of diabetes and heart failure. Almost all of these patients remained hyperglycemic during their hospital stay (mean BG = 206 mg/dL), and 43% received no inpatient hypoglycemic drugs. Hyperglycemic patients had longer hospital stay (7 vs 6 days, p = 0.015) and higher inpatient hospital charges ($6,611 vs $5,262, p < 0.001). Hyperglycemia independently increased the risk for death at 30 days (HR 1.87, p < or = 0.01), 1 year (HR 1.75, p < or = 0.01), and 6 years after stroke (HR 1.41, p </= 0.01). CONCLUSIONS Admitting hyperglycemia was common among patients with acute ischemic stroke and was associated with increased short- and long-term mortality and with increased inpatient charges. Inpatient blood glucose management was suboptimal in this hospital. A trial of intensive treatment of hyperglycemia should be considered.
Collapse
Affiliation(s)
- L S Williams
- Roudebush VA Medical Center, Indiana University School of Medicine, Indianapolis 46202, USA.
| | | | | | | | | | | | | | | |
Collapse
|
39
|
Ma W, Yang M, Wang J, Qi R, Ren L. Treatment of antibiotics wastewater utilizing successive hydrolysis, denitrification and nitrification. Environ Technol 2002; 23:685-694. [PMID: 12118620 DOI: 10.1080/09593330.2002.9619253] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A process consisting of anaerobic hydrolysis, denitrification, and oxidation/nitrification was proposed for simultaneous removal of carbon and nitrogen from terramycin crystallizing mother solution (TCMS), and its performance was investigated by treating diluted TCMS in a lab-scale continuous flow column system. Direct denitrification-nitrification of diluted TCMS produced a significant residual of nitrate and nitrite, which disappeared 44 days after startup of anaerobic hydrolysis column. The electron donors available to denitrification were increased by 6 times after diluted TCMS was treated in the hydrolysis column under an HRT of 2.5 h or longer. The reaction rates of organics decomposition, nitrification, and denitrification were also significantly increased due to reduction of terramycin and decomposition of complicated molecules to small molecules during anaerobic hydrolysis. The specific denitrification rate and nitrification rate increased from 0.033 d(-1) and 0.01 d(-1) to 0.045 d(-1) and 0.021 d(-1) respectively after diluted TCMS (dilution ratio: 1:4) was hydrolyzed in anaerobic hydrolysis column at a hydraulic retention time (HRT) of 4 h.
Collapse
Affiliation(s)
- W Ma
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing
| | | | | | | | | |
Collapse
|
40
|
Hegde P, Qi R, Gaspard R, Abernathy K, Dharap S, Earle-Hughes J, Gay C, Nwokekeh NU, Chen T, Saeed AI, Sharov V, Lee NH, Yeatman TJ, Quackenbush J. Identification of tumor markers in models of human colorectal cancer using a 19,200-element complementary DNA microarray. Cancer Res 2001; 61:7792-7. [PMID: 11691794] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
Metastasis represents a crucial transition in disease development and progression and has a profound impact on survival for a wide variety of cancers. Cell line models of metastasis have played an important role in developing our understanding of the metastatic process. We used a 19,200-element human cDNA microarray to profile transcription in three paired cell-line models of colorectal tumor metastasis. By correlating expression patterns across these cell lines, we have identified 176 genes that appear to be differentially expressed (greater than 2-fold) in all highly metastatic cell lines relative to their reference. An analysis of these genes reiterates much of our understanding of the metastatic process and suggests additional genes, many of previously uncharacterized function, that may be causatively involved in, or at least prognostic of, metastasis. Northern analysis of a limited number of these genes validates the observed pattern of expression and suggests that further investigation and functional characterization of the identified genes is warranted.
Collapse
Affiliation(s)
- P Hegde
- The Institute for Genomic Research, Rockville, Maryland 20850, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Tang BL, Ong YS, Huang B, Wei S, Wong ET, Qi R, Horstmann H, Hong W. A membrane protein enriched in endoplasmic reticulum exit sites interacts with COPII. J Biol Chem 2001; 276:40008-17. [PMID: 11489904 DOI: 10.1074/jbc.m106189200] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Although all mammalian COPII components have now been cloned, little is known of their interactions with other regulatory proteins involved in exit from the endoplasmic reticulum (ER). We report here that a mammalian protein (Yip1A) that is about 31% identical to S. cerevisiae and which interacts with and modulates COPII-mediated ER-Golgi transport. Yip1A transcripts are ubiquitously expressed. Transcripts of a related mammalian homologue, Yip1B, are found specifically in the heart. Indirect immunofluorescence microscopy revealed that Yip1A is localized to vesicular structures that are concentrated at the perinuclear region. The structures marked by Yip1A co-localized with Sec31A and Sec13, components of the COPII coat protein complex. Immunoelectron microscopy also showed that Yip1A co-localizes with Sec13 at ER exit sites. Overexpression of the hydrophilic N terminus of Yip1A arrests ER-Golgi transport of the vesicular stomatitis G protein and causes fragmentation and dispersion of the Golgi apparatus. A glutathione S-transferase fusion protein with the hydrophilic N terminus of Yip1A (GST-Yip1A) is able to bind to and deplete vital components from rat liver cytosol that is essential for in vitro vesicular stomatitis G transport. Peptide sequence analysis of cytosolic proteins that are specifically bound to GST-Yip1A revealed, among other proteins, mammalian COPII components Sec23 and Sec24. A highly conserved domain at the N terminus of Yip1A is required for Sec23/Sec24 interaction. Our results suggest that Yip1A is involved in the regulation of ER-Golgi traffic at the level of ER exit sites.
Collapse
Affiliation(s)
- B L Tang
- Membrane Biology Laboratory, Central Imaging and Histology Facility, Institute of Molecular and Cell Biology, 30 Medical Drive, Singapore 117609, Republic of Singapore.
| | | | | | | | | | | | | | | |
Collapse
|
42
|
Wang H, Wang Y, Qu Y, Qi R, Lu D, Li C, Yan L. The cAMP-mediated protein kinase signal transduction pathway is involved in the pyrogenic effect of CRH in rats. Chin Med J (Engl) 2001; 114:1064-7. [PMID: 11677768 DOI: pmid/11677768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
OBJECTIVE To determine whether the cyclic adenosine monophosphate (cAMP) mediated protein kinase signal transduction pathway is involved in the pyrogenic action of corticotropin releasing hormone (CRH) in rats. METHODS Corticotropin releasing hormone, 2',3'-dideoxyadenosine (DDA) and adenosine-3',5'-(cyclic) monophosphorothionate, Rp-Isomer (Rp-cAMPS), were administered intracerebroventricularly (i.c.v.). The colonic temperature was measured using a thermistor, and the content of cAMP in the hypothalamus was determined by radioimmunoassay. Hypothalamic incubation was used to assess the effects of CRH on the content of cAMP in the hypothalamus in vitro. RESULTS Microinjection (i.c.v.) of CRH (2.5 micrograms, 5.0 micrograms and 10 micrograms) caused increases in colonic temperature and the hypothalamus cAMP level in conscious rats. CRH increased hypothalamus cAMP level in vitro. The pyrogenic effects of CRH were abolished or markedly inhibited by prior injection (i.c.v.) of an adenylate cyclase inhibitor, DDA (30 micrograms), or an inhibitor of cAMP-dependent protein kinase, Rp-cAMPS (15 micrograms). CONCLUSION cAMP mediates the pyrogenic action of centrally administered of CRH in rats, and protein kinase A may play an important role in the central CRH-induced fever. The cAMP-dependent protein kinase signal transduction pathway may be involved in the central mechanisms of the pyrogenic action of CRH in rats.
Collapse
Affiliation(s)
- H Wang
- Department of Pathophysiology, Medical College of Jinan University, Guangzhou 510632, China.
| | | | | | | | | | | | | |
Collapse
|
43
|
Lim A, Dimalanta ET, Potamousis KD, Yen G, Apodoca J, Tao C, Lin J, Qi R, Skiadas J, Ramanathan A, Perna NT, Plunkett G, Burland V, Mau B, Hackett J, Blattner FR, Anantharaman TS, Mishra B, Schwartz DC. Shotgun optical maps of the whole Escherichia coli O157:H7 genome. Genome Res 2001; 11:1584-93. [PMID: 11544203 PMCID: PMC311123 DOI: 10.1101/gr.172101] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2000] [Accepted: 06/04/2001] [Indexed: 11/24/2022]
Abstract
We have constructed NheI and XhoI optical maps of Escherichia coli O157:H7 solely from genomic DNA molecules to provide a uniquely valuable scaffold for contig closure and sequence validation. E. coli O157:H7 is a common pathogen found in contaminated food and water. Our approach obviated the need for the analysis of clones, PCR products, and hybridizations, because maps were constructed from ensembles of single DNA molecules. Shotgun sequencing of bacterial genomes remains labor-intensive, despite advances in sequencing technology. This is partly due to manual intervention required during the last stages of finishing. The applicability of optical mapping to this problem was enhanced by advances in machine vision techniques that improved mapping throughput and created a path to full automation of mapping. Comparisons were made between maps and sequence data that characterized sequence gaps and guided nascent assemblies.
Collapse
Affiliation(s)
- A Lim
- Laboratory for Molecular and Computational Genomics, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Ma W, Wang J, Liang C, Qi R, Yang M. [Anaerobic hydrolysis of terramycin crystallizing mother solution]. Huan Jing Ke Xue 2001; 22:41-4. [PMID: 11769226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
The terramycin crystallizing mother solution contained high organics and high nitrogen. There were many kinds of bioinhibition in it but not enough electronic donor. Anaerobic hydrolysis of terramycin crystallizing mother solution was completed with up anarobic sludge bed in order to improve the biodegradability of wastewater and electronic donor in it. The variations of pH, COD, NH4+, and SO4(2-) were monitored. The COD removal was in a narrow range between 10% and 16.4% even when the HRT of the reactor was changed from 1.5 h to 6 h. pH increased because of formation of NH3 and reduction of SO4(2-). Most of SO4(2-) was reduced to S2- when the HRT was longer than 2 h. Batch experiments on hydrolyzed wastewater demonstrated that reaction rates of nitrification and denitrification increased by 90.9% and 45.2%, respectively.
Collapse
Affiliation(s)
- W Ma
- State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Beijing, 100085
| | | | | | | | | |
Collapse
|
45
|
Abstract
Microarray gene expression technology has recently made it feasible to characterize the RNA expression of thousands of genes across numerous tissue samples. We hypothesized that the warm ischemia commonly associated with the surgical extirpation of human tissue would have significant effects on gene expression profiles. To quantitate the effects of warm ischemia on human tissue, we rapidly dissected normal mucosa from a human colon cancer specimen. The specimen was divided and maintained at room temperature until snap-frozen in liquid nitrogen. Aliquots of tissue were frozen at times 5, 10, 15, 20, 40, and 60 min after extirpation. Spotted microarrays composed of 2400 distinct elements were used to assay mRNA derived from each time point in triplicate. Eisen's hierarchical clustering methodology and Bayesean statistical methods were then used to assay the effects of warm ischemia on gene expression. Application of time-course statistical models suggest that three patterns were induced by ischemia, accounting for 68.2, 17.8, and 13.4% of the evaluable genes, respectively. Pattern I corresponds to an average change of 27% over 60 min from 5 min baseline level of expression and 63.8% of the genes with at least 80% probability of membership in this pattern show average increases in expression over 60 min. The remainder decrease on average. Pattern II genes show the least ischemia-related effects, demonstrating an average change of only 12% over 60 min. In contrast to pattern I, we find that 67.5% of the genes with at least 80% probability of membership in this pattern are decreasing in expression on average over time. The remaining 32.5% in this pattern increase an average of 12% over 60 min. Finally, pattern III genes (13.4% of the sample) show the greatest sensitivity to ischemia, changing an average of 50% over 60 min, with about the same number increasing as are decreasing. Fold changes in RNA over- or under-expression were observed up to greater than 20-fold. Warm ischemia associated with the surgical extirpation of human tissues has significant effects on gene expression. These data support the careful monitoring of ischemic time for tissues harvested for the purpose of gene profiling.
Collapse
Affiliation(s)
- J Huang
- Department of Surgery and Biostatistics, H. Lee Moffitt Cancer Center, University of South Florida, 12902 Magnolia Drive, Tampa, FL 33647, USA
| | | | | | | | | | | |
Collapse
|
46
|
Gaspard R, Dharap S, Malek J, Qi R, Quackenbush J. Optimized growth conditions for direct amplification of cDNA clone inserts from culture. Biotechniques 2001; 31:35-6. [PMID: 11464517 DOI: 10.2144/01311bm04] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Affiliation(s)
- R Gaspard
- Institute for Genomic Research, 9712 Medical Center Dr., Rockville, MD 20850, USA
| | | | | | | | | |
Collapse
|
47
|
Abstract
Although communications between platelets and endothelial cells or other blood cells are important in in vivo thrombus formation, laboratory platelet function tests are usually performed in isolation from these surrounding cells. In this study, we evaluated the effect of an antiplatelet drug, ibudilast (3-isobutyryl-2-isopropylpyrazolo[1,5-a]pyridine), on platelet aggregation in the presence and absence of human umbilical vein endothelial cells (HUVECs) and with the use of platelet-rich plasma (PRP) or whole blood as platelet samples. Stimulation-dependent platelet aggregation was weakened in the presence of HUVECs, which was especially prominent when the thrombin receptor-activating peptide SFLL (compared with ADP and epinephrine) was used as an aggregating agent. Ibudilast hardly affected SFLL-induced platelet aggregation (in PRP), while this antiplatelet agent was found to clearly inhibit this SFLL-induced response in a concentration-dependent manner, in the presence of HUVECs. Ibudilast tended to inhibit ADP- or epinephrine-induced platelet aggregation in the presence of HUVECs, but the effects were not statistically significant. Enhanced inhibition by ibudilast of SFLL-induced platelet aggregation (in the presence of HUVECs) was reproduced with the use of whole blood samples when a screen filtration pressure method was employed. It is suggested that the platelet aggregation studies in the presence of endothelial cells and/or other blood cells provide us with valuable information on platelet reactivity in vivo and improvement of antiplatelet therapy.
Collapse
Affiliation(s)
- G Rile
- Department of Clinical and Laboratory Medicine, Yamanashi Medical University, Tamaho, Yamanashi 409-3898, Nakakoma, Japan
| | | | | | | | | |
Collapse
|
48
|
Abstract
Oxygen starvation triggers the shiftdown of the obligate aerobe Mycobacterium bovis BCG to a state of dormancy. Two-dimensional electrophoresis showed a drastic up-regulation of the alpha-crystallin homolog, the putative response regulator Rv3133c, and the two conserved hypothetical proteins Rv2623 and Rv2626c in dormant bacilli.
Collapse
Affiliation(s)
- C Boon
- Mycobacterium Laboratory, Institute of Molecular and Cell Biology, Singapore 117609, Republic of Singapore
| | | | | | | |
Collapse
|
49
|
Affiliation(s)
- R Qi
- Department of Clinical and Laboratory Medicine, Yamanashi Medical University, Yamanashi, Japan
| | | | | |
Collapse
|
50
|
Yang M, Zhang Y, Qi R, Uesugi K, Myoga H. Improved O3/H2O2 oxidation process for wastewater reclamation. Water Sci Technol 2001; 43:311-318. [PMID: 11436796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
A continuous two step O3/H2O2 oxidation system, in which the waste gas from the former reactor was reused in the latter step with an ejector, was established for the purpose of wastewater reclamation in electronics industries. ORP monitor was combined into the system to obtain the optimum ratio of H2O2 to O3 by automatically adjusting the dosage of H2O2, and ion exchange resin was used for removing organic acids formed during oxidation. The effectiveness of the O3/H2O2 oxidation system for TOC removal was investigated under various conditions by using IPA, DMSO, and NMP as model substances. The optimum H2O2/O3 for oxidizing IPA was in a range above 0.15, and it increased with the increase of O3 dose. A sudden drop of ORP from ca. 800 mV to a little more than 200 mV was observed when H2O2/O3 was approaching the optimum point from the lower end. An ORP between 250 mV and 300 mV or 800 mV and 900 mV was proper for H2O2/O3 control. The treatability of the model substances was in an order of IPA << DMSO < NMP, being consistent with the magnitude of the energy of the highest occupied molecular orbital (epsilon HOMO). The two step treatment system developed in this study was found to be more efficient than the conventional single step system. With the help of H2O2 dosing control and two step treatment using waste O3, the system could save about 40% O3 in comparison with the conventional O3/H2O2 oxidation process.
Collapse
Affiliation(s)
- M Yang
- State Key Lab. of Environmental Aquatic Chemistry, RCEES, P.O. Box 2871, Beijing, 100085 China
| | | | | | | | | |
Collapse
|