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Ma R, Hao L, Cheng J, He J, Yin Q, Li Z, Qi G, Zheng X, Wang D, Zhang T, Cong H, Li Z, Hu H, Wang Y. Hyaluronic acid-modified mesoporous silica nanoprobes for target identification of atherosclerosis. Biochem Biophys Res Commun 2024; 702:149627. [PMID: 38340655 DOI: 10.1016/j.bbrc.2024.149627] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 01/23/2024] [Accepted: 02/01/2024] [Indexed: 02/12/2024]
Abstract
Rupture of vulnerable plaque and secondary thrombosis caused by atherosclerosis are one of the main causes of acute cardiovascular and cerebrovascular events, and it is urgent to develop an in-situ, noninvasive, sensitive and targeted detection method at molecular level. We chose CD44, a specific receptor highly expressed on the surface of macrophages, as the target of the molecular probe, and modified the CD44 ligand HA onto the surface of Gd2O3@MSN, constructing the MRI imaging nanoprobe HA-Gd2O3@MSN for targeted recognition of atherosclerosis. The fundamental properties of HA-Gd2O3@MSN were initially investigated. The CCK-8, hemolysis, hematoxylin-eosin staining tests and blood biochemical assays confirmed that HA-Gd2O3@MSN possessed excellent biocompatibility. Laser confocal microscopy, cellular magnetic resonance imaging, flow cytometry and immunohistochemistry were used to verify that the nanoprobes had good targeting properties. The in vivo targeting performance of the nanoprobes was further validated by employing a rabbit atherosclerosis animal model. In summary, the synthesized HA-Gd2O3@MSN nanoprobes have excellent biocompatibility properties as well as good targeting properties. It could provide a new technical tool for early identification of atherosclerosis.
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Affiliation(s)
- Ruifan Ma
- Department of Molecular Imagine, School of Medical Technology, Qiqihar Medical University, Qiqihar, 161006, China
| | - Liguo Hao
- Department of Molecular Imagine, School of Medical Technology, Qiqihar Medical University, Qiqihar, 161006, China
| | - Jianing Cheng
- Department of Molecular Imagine, School of Medical Technology, Qiqihar Medical University, Qiqihar, 161006, China
| | - Jun He
- Department of Anatomy, School of Medical Technology, Qiqihar Medical University, Qiqihar, 161006, China
| | - Qiangqiang Yin
- Department of Molecular Imagine, School of Medical Technology, Qiqihar Medical University, Qiqihar, 161006, China
| | - Zhongtao Li
- Department of Molecular Imagine, School of Medical Technology, Qiqihar Medical University, Qiqihar, 161006, China
| | - Guiqiang Qi
- Department of Molecular Imagine, School of Medical Technology, Qiqihar Medical University, Qiqihar, 161006, China
| | - Xiaoyang Zheng
- Department of Image Center, The Second Affiliated Hospital of Qiqihar Medical University, Qiqihar, 161006, China
| | - Dongxu Wang
- Department of Image Center, The Second Affiliated Hospital of Qiqihar Medical University, Qiqihar, 161006, China
| | - Tianyu Zhang
- Department of Image Center, The Second Affiliated Hospital of Qiqihar Medical University, Qiqihar, 161006, China
| | - Houyi Cong
- Department of Image Center, The Second Affiliated Hospital of Qiqihar Medical University, Qiqihar, 161006, China
| | - Zheng Li
- Department of Image Center, The Second Affiliated Hospital of Qiqihar Medical University, Qiqihar, 161006, China
| | - Haifeng Hu
- Department of Image Center, The Second Affiliated Hospital of Qiqihar Medical University, Qiqihar, 161006, China
| | - Yuguang Wang
- Department of Image Center, The Second Affiliated Hospital of Qiqihar Medical University, Qiqihar, 161006, China.
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Huang J, Wang Z, Chen Z, Huang C, Wang Y, Li X, Lv W, Qi G, Liu H. Ultrasound-mediated multifunctional magnetic microbubbles for drug delivery of celastrol in VX2 liver transplant tumors. Drug Deliv Transl Res 2024; 14:555-570. [PMID: 37639148 DOI: 10.1007/s13346-023-01421-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/18/2023] [Indexed: 08/29/2023]
Abstract
Celastrol (CST) has positive pharmacological effects on various cancers, but clinical application is limited because of poor water solubility and systemic toxicity. Ferric oxide (Fe3O4) has a large specific surface area and can be functionalized by inorganic modification to form complex magnetic drug delivery systems. Herein, Fe3O4 was surface-modified with citric acid and polyethylene glycol (PEG) (via) the Mitsunobu reaction and then covalently bound to CST. Finally, magnetic microbubbles (MMBs) containing perfluoropropane (C3F8) and Fe3O4-PEG2K-CST particles were constructed with poly(lactic-co-glycolic acid) (PLGA) as the shell membrane. In vitro studies showed that ultrasound-mediated MMBs exhibited improved inhibition of VX2 cell proliferation compared to inhibition achieved using MMBs without ultrasound mediation, blank MMBs, or free CST. In ultrasound mode, MMBs have favorable imaging properties. After the application of a high mechanical index, MMBs collapse through the cavitation effect, releasing their internal Fe3O4-PEG2K-CST. The CST is then delivered to the tumor microenvironment under acidic conditions. In magnetic resonance imaging T2 mode, a specific hypointense signal was observed in the tumor area compared with that before treatment, whereas no significant change occurred in the signal intensity of the surrounding organs. After treatment, pathological examination of tumor-bearing rabbit tissues showed that iron elements accumulated in several apoptosis cells in the tumor area, with no apparent abnormalities found in other areas. Thus, ultrasound-mediated MMBs could significantly improve the drug uptake of solid tumors and inhibit tumor growth with favorable biological safety.
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Affiliation(s)
- Jian Huang
- Qiqihar Medical University, Qiqihar, China
| | | | - Zihe Chen
- Qiqihar Medical University, Qiqihar, China
| | - Chunxin Huang
- Department of Ultrasound, The Second Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
| | - Ying Wang
- Department of Ultrasound, The Second Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
| | - Xing Li
- Department of Ultrasound, The Second Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
| | - Weiyang Lv
- Department of Ultrasound, The Second Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
| | | | - Huilin Liu
- Department of Ultrasound, The Second Affiliated Hospital of Qiqihar Medical University, Qiqihar, China.
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Wang Z, Wu C, Liu J, Hu S, Yu J, Yin Q, Tian H, Ding Z, Qi G, Wang L, Hao L. Aptamer-mediated hollow MnO 2 for targeting the delivery of sorafenib. Drug Deliv 2023; 30:28-39. [DOI: 10.1080/10717544.2022.2149897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Affiliation(s)
- Ziyue Wang
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, China
| | - Cuicui Wu
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, China
| | - Jinren Liu
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, China
| | - Shunxin Hu
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, China
| | - Junli Yu
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, China
| | - Qiangqiamg Yin
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, China
| | - Hongda Tian
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, China
| | - Zhipeng Ding
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, China
| | - Guiqiang Qi
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, China
| | - Li Wang
- Department of Personnel, the Third Affiliated Hospital of Qiqihar Medical University, Qiqihar, China
| | - Liguo Hao
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, China
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Qi G, Shi G, Wang S, Hu H, Zhang Z, Yin Q, Li Z, Hao L. A Novel pH-Responsive Iron Oxide Core-Shell Magnetic Mesoporous Silica Nanoparticle (M-MSN) System Encapsulating Doxorubicin (DOX) and Glucose Oxidase (Gox) for Pancreatic Cancer Treatment. Int J Nanomedicine 2023; 18:7133-7147. [PMID: 38054080 PMCID: PMC10695029 DOI: 10.2147/ijn.s436253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2023] [Accepted: 11/21/2023] [Indexed: 12/07/2023] Open
Abstract
Introduction This study developed a pancreatic cancer targeted drug delivery system that responds to changes in acidity. The system was based on iron oxide core-shell magnetic mesoporous silica nanoparticles (M-MSNs) to treat pancreatic cancer through combined chemotherapy and starvation therapy. Methods Glucose oxidase (Gox) was coupled to the cancer cell surface to reduce glucose availability for cancer cells, exacerbating the heterogeneity of the tumor microenvironment. Reduced pH accelerated the depolymerization of pH-sensitive polydopamine (PDA), thereby controlling the spatial distribution of Gox and release of doxorubicin (DOX) within tumor cells. Results Characterization results showed the successful synthesis of DG@M-MSN-PDA-PEG-FA (DG@NPs) with a diameter of 66.02 ± 3.6 nm. In vitro data indicated DG@NPs were highly effective and stable with good cellular uptake shown by confocal laser scanning microscopy (CLSM). DG@NPs exhibited high cytotoxicity and induced apoptosis. Additionally, in vivo experiments confirmed DG@NPs effectively inhibited tumor growth in nude mice with good biosafety. The combination of starvation therapy and chemotherapy facilitated drug release, suggesting DG@NPs as a novel drug delivery system for pancreatic cancer treatment. Conclusion This study successfully constructed a doxorubicin release system responsive to acidity changes for targeted delivery in pancreatic cancer, providing a new strategy for combination therapy.
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Affiliation(s)
- Guiqiang Qi
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, 161006, People’s Republic of China
| | - Guangyue Shi
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, 161006, People’s Republic of China
| | - Shengchao Wang
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, 161006, People’s Republic of China
| | - Haifeng Hu
- Medical Imaging Center, The Second Affiliated Hospital of Qiqihar Medical University, Qiqihar, Heilongjiang, 161000, People’s Republic of China
| | - Zhichen Zhang
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, 161006, People’s Republic of China
| | - Qiangqiang Yin
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, 161006, People’s Republic of China
| | - Zhongtao Li
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, 161006, People’s Republic of China
| | - Liguo Hao
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, 161006, People’s Republic of China
- Department of Molecular Imaging, The First Affiliated Hospital of Qiqihar Medical University, Qiqihar, Heilongjiang, 161041, People’s Republic of China
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Shi G, Li Z, Zhang Z, Yin Q, Li N, Wang S, Qi G, Hao L. Functionalized europium-doped hollow mesoporous silica nanospheres as a cell imaging and drug delivery agents. Biochem Biophys Res Commun 2023; 674:1-9. [PMID: 37392717 DOI: 10.1016/j.bbrc.2023.06.082] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Accepted: 06/26/2023] [Indexed: 07/03/2023]
Abstract
In an effort to enhance the antitumor efficacy of breast cancer treatment, the chemotherapeutic agent Paclitaxel (PTX) was encapsulated within hyaluronic acid (HA) modified hollow mesoporous silica (HMSNs). In vitro drug release assays showed that the resulting formulation, Eu-HMSNs-HA-PTX, exhibited enzyme-responsive drug release. In addition, cell cytotoxicity and hemolysis assays demonstrated the favorable biocompatibility of both Eu-HMSNs and Eu-HMSNs-HA. Notably, compared to Eu-HMSNs alone, Eu-HMSNs-HA showed enhanced accumulation within CD44-expressing cancer cells (MDA-MB-231). As anticipated, apoptosis experiments indicated that Eu-HMSNs-HA-PTX displayed significantly greater cytotoxicity toward MDA-MB-231 cells than non-targeted Eu-HMSNs-PTX and free PTX. In conclusion, Eu-HMSNs-HA-PTX demonstrated excellent anticancer effects and holds promise as a potent candidate for the efficient therapy of breast cancer.
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Affiliation(s)
- Guangyue Shi
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, 161006, China
| | - Zhongtao Li
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, 161006, China
| | - Zhichen Zhang
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, 161006, China
| | - Qiangqiang Yin
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, 161006, China
| | - Na Li
- Department of Imaging Medicine and Nuclear Medicine, School of Clinical Medicine, Jiamusi University, Jiamusi, Heilongjiang, 154002, China
| | - Shengchao Wang
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, 161006, China
| | - Guiqiang Qi
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, 161006, China
| | - Liguo Hao
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar, Heilongjiang, 161006, China.
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Wang S, Qi G, Zhang Z, Yin Q, Li N, Li Z, Shi G, Hu H, Hao L. cRGD-Conjugated GdIO Nanoclusters for the Theranostics of Pancreatic Cancer through the Combination of T 1-T 2 Dual-Modal MRI and DTX Delivery. Molecules 2023; 28:6134. [PMID: 37630386 PMCID: PMC10459307 DOI: 10.3390/molecules28166134] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/27/2023] [Accepted: 08/15/2023] [Indexed: 08/27/2023] Open
Abstract
Clinically, magnetic resonance imaging (MRI) often uses contrast agents (CAs) to improve image contrast, but single-signal MRI CAs are often susceptible to calcification, hemorrhage, and magnetic sensitivity. Herein, iron acetylacetone and gadolinium acetylacetone were used as raw materials to synthesize a T1-T2 dual-mode imaging gadolinium-doped iron oxide (GdIO) nanocluster. Moreover, to endow the nanoclusters with targeting properties and achieve antitumor effects, the cyclic Arg-Gly-Asp (cRGD) peptide and docetaxel (DTX) were attached to the nanocluster surface, and the efficacy of the decorated nanoclusters against pancreatic cancer was evaluated. The final synthesized material cRGD-GdIO-DTX actively targeted αvβ3 on the surface of Panc-1 pancreatic cancer cells. Compared with conventional passive targeting, the enrichment of cRGD-GdIO-DTX in tumor tissues improved, and the diagnostic accuracy was significantly enhanced. Moreover, the acidic tumor microenvironment triggered the release of DTX from cRGD-GdIO-DTX, thus achieving tumor treatment. The inhibition of the proliferation of SW1990 and Panc-1 pancreatic cancer cells by cRGD-GdIO-DTX was much stronger than that by the untargeted GdIO-DTX and free DTX in vitro. In addition, in a human pancreatic cancer xenograft model, cRGD-GdIO-DTX considerably slowed tumor development and demonstrated excellent magnetic resonance enhancement. Our results suggest that cRGD-GdIO-DTX has potential applications for the precise diagnosis and efficient treatment of pancreatic cancer.
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Affiliation(s)
- Shengchao Wang
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar 161006, China; (S.W.)
| | - Guiqiang Qi
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar 161006, China; (S.W.)
| | - Zhichen Zhang
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar 161006, China; (S.W.)
| | - Qiangqiang Yin
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar 161006, China; (S.W.)
| | - Na Li
- Department of Imaging Medicine and Nuclear Medicine, School of Clinical Medicine, Jiamusi University, Jiamusi 154002, China
| | - Zhongtao Li
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar 161006, China; (S.W.)
| | - Guangyue Shi
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar 161006, China; (S.W.)
| | - Haifeng Hu
- Medical Imaging Center, The Second Affiliated Hospital of Qiqihar Medical University, Qiqihar 161000, China
| | - Liguo Hao
- Department of Molecular Imaging, School of Medical Technology, Qiqihar Medical University, Qiqihar 161006, China; (S.W.)
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Yin Q, Qi G, Wang S, Tian H, Gao X, Zhang Z, Hao L. Magnetic resonance/fluorescence dual-modality contrast agents targeting α vβ 6-overexpressing tumors based on A20FMDV2 peptide as a ligand. Biochem Biophys Res Commun 2023; 664:86-93. [PMID: 37141641 DOI: 10.1016/j.bbrc.2023.04.071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 04/05/2023] [Accepted: 04/20/2023] [Indexed: 05/06/2023]
Abstract
Pancreatic ductal adenocarcinoma (PDAC) is a malignant digestive system tumor with a poor late-stage prognosis. This study aimed to identify new methods for the early detection of PDAC. The nanoprobe A20FMDV2-Gd-5-FAM was developed using A20FMDV2 (N1AVPNLRGDLQVLAQKVART20-NH2, A20FMDV2) as the ligand and characterized using dynamic light scattering, transmission electron microscopy, Fourier transform infrared analysis, and UV absorption spectroscopy. The binding of pancreatic cancer cells AsPC-1, MIA PaCa-2, and normal human pancreatic H6C7 cells (HPDE6-C7) to the probe was verified using laser confocal microscopy, and the biocompatibility of the probe was evaluated in vivo. In vivo magnetic resonance and fluorescence imaging were also performed on nude mice with subcutaneous pancreatic tumor xenografts to verify the bimodal imaging performance of the probe. The probe exhibited good stability and biocompatibility and an enhanced relaxation rate (25.46 ± 1.32 mM-1 s-1) than Gd-DTPA. Confocal laser scanning microscopy results revealed that the A20FMDV2-Gd-5-FAM probe could be successfully ingested and internalized, and infrared analysis results demonstrated that the probe was linked successfully. Finally, magnetic resonance T1WI imaging and intravital fluorescence imaging demonstrated the specific signal enhancement of the probe at the tumor site. In conclusion, the bimodal molecular probe A20FMDV2-Gd-5-FAM showed a stable magnetic resonance and fluorescence bimodal imaging performance and is a promising new approach for diagnosing early-stage cancers with a high integrin αvβ6 expression.
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Affiliation(s)
- Qiangqiang Yin
- School of Medical Technology, Qiqihar Medical University, Qiqihar, 161006, Heilongjiang, China
| | - Guiqiang Qi
- School of Medical Technology, Qiqihar Medical University, Qiqihar, 161006, Heilongjiang, China
| | - Shengchao Wang
- School of Medical Technology, Qiqihar Medical University, Qiqihar, 161006, Heilongjiang, China
| | - Hongda Tian
- School of Medical Technology, Qiqihar Medical University, Qiqihar, 161006, Heilongjiang, China
| | - Xiaolong Gao
- School of Medical Technology, Qiqihar Medical University, Qiqihar, 161006, Heilongjiang, China
| | - Zhichen Zhang
- School of Medical Technology, Qiqihar Medical University, Qiqihar, 161006, Heilongjiang, China
| | - Liguo Hao
- School of Medical Technology, Qiqihar Medical University, Qiqihar, 161006, Heilongjiang, China.
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Hu L, Brito LF, Abbas Z, Sammad A, Kang L, Wang D, Wu H, Liu A, Qi G, Zhao M, Wang Y, Xu Q. Investigating the Short-Term Effects of Cold Stress on Metabolite Responses and Metabolic Pathways in Inner-Mongolia Sanhe Cattle. Animals (Basel) 2021; 11:ani11092493. [PMID: 34573458 PMCID: PMC8469163 DOI: 10.3390/ani11092493] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 08/22/2021] [Accepted: 08/23/2021] [Indexed: 12/18/2022] Open
Abstract
Simple Summary Cold stress is a major environmental stressor affecting cattle performance in temperate regions, which causes impaired welfare and economic losses to cattle producers. The identification of biological mechanisms associated with cold stress response is paramount for developing effective mitigation strategies, such as genomic selection. In this study, we assessed the short-term effects of hyper-cold stress on metabolite responses and metabolic pathways in the serum of Inner-Mongolia Sanhe cattle. Moreover, 19 differential metabolites were found, mainly involved in amino acid metabolism. A further integration of metabolome results and gene expression highlighted the regulation of metabolic changes and related pathways in severe cold exposure, such as “aminoacyl-tRNA biosynthesis” and “valine, leucine, and isoleucine degradation”. In summary, we presented new insights on the short-term effects of severe cold stress as well as metabolites and metabolic pathways associated with cold stress response in Inner-Mongolia Sanhe cattle. Abstract Inner-Mongolia Sanhe cattle are well-adapted to low-temperature conditions, but the metabolic mechanisms underlying their climatic resilience are still unknown. Based on the 1H Nuclear Magnetic Resonance platform, 41 metabolites were identified and quantified in the serum of 10 heifers under thermal neutrality (5 °C), and subsequent exposure to hyper-cold temperature (−32 °C) for 3 h. Subsequently, 28 metabolites were pre-filtrated, and they provided better performance in multivariate analysis than that of using 41 metabolites. This indicated the need for pre-filtering of the metabolome data in a paired experimental design. In response to the cold exposure challenge, 19 metabolites associated with cold stress response were identified, mainly enriched in “aminoacyl-tRNA biosynthesis” and “valine, leucine, and isoleucine degradation”. A further integration of metabolome and gene expression highlighted the functional roles of the DLD (dihydrolipoamide dehydrogenase), WARS (tryptophanyl-tRNA synthetase), and RARS (arginyl-tRNA synthetase) genes in metabolic pathways of valine and leucine. Furthermore, the essential regulations of SLC30A6 (solute carrier family 30 (zinc transporter), member 6) in metabolic transportation for propionate, acetate, valine, and leucine under severe cold exposure were observed. Our findings presented a comprehensive characterization of the serum metabolome of Inner-Mongolia Sanhe cattle, and contributed to a better understanding of the crucial roles of regulations in metabolites and metabolic pathways during cold stress events in cattle.
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Affiliation(s)
- Lirong Hu
- College of Life Sciences and Bioengineering, Beijing Jiaotong University, Beijing 100044, China; (L.H.); (Z.A.); (L.K.)
- Key Laboratory of Animal Genetics, Breeding and Reproduction, MARA, National Engineering Laboratory for Animal Breeding, Beijing Engineering Technology Research Center of Raw Milk Quality and Safety Control, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China;
| | - Luiz F. Brito
- Department of Animal Sciences, Purdue University, West Lafayette, IN 47907, USA;
| | - Zaheer Abbas
- College of Life Sciences and Bioengineering, Beijing Jiaotong University, Beijing 100044, China; (L.H.); (Z.A.); (L.K.)
| | - Abdul Sammad
- Key Laboratory of Animal Genetics, Breeding and Reproduction, MARA, National Engineering Laboratory for Animal Breeding, Beijing Engineering Technology Research Center of Raw Milk Quality and Safety Control, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China;
| | - Ling Kang
- College of Life Sciences and Bioengineering, Beijing Jiaotong University, Beijing 100044, China; (L.H.); (Z.A.); (L.K.)
| | - Dongsheng Wang
- Xiertala Cattle Breeding Farm, Hailaer Farm Buro, Hailaer, Hulunbuir 021012, China; (D.W.); (H.W.); (A.L.); (G.Q.); (M.Z.)
| | - Hongjun Wu
- Xiertala Cattle Breeding Farm, Hailaer Farm Buro, Hailaer, Hulunbuir 021012, China; (D.W.); (H.W.); (A.L.); (G.Q.); (M.Z.)
| | - Airong Liu
- Xiertala Cattle Breeding Farm, Hailaer Farm Buro, Hailaer, Hulunbuir 021012, China; (D.W.); (H.W.); (A.L.); (G.Q.); (M.Z.)
| | - Guiqiang Qi
- Xiertala Cattle Breeding Farm, Hailaer Farm Buro, Hailaer, Hulunbuir 021012, China; (D.W.); (H.W.); (A.L.); (G.Q.); (M.Z.)
| | - Man Zhao
- Xiertala Cattle Breeding Farm, Hailaer Farm Buro, Hailaer, Hulunbuir 021012, China; (D.W.); (H.W.); (A.L.); (G.Q.); (M.Z.)
| | - Yachun Wang
- Key Laboratory of Animal Genetics, Breeding and Reproduction, MARA, National Engineering Laboratory for Animal Breeding, Beijing Engineering Technology Research Center of Raw Milk Quality and Safety Control, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China;
- Correspondence: (Y.W.); (Q.X.)
| | - Qing Xu
- College of Life Sciences and Bioengineering, Beijing Jiaotong University, Beijing 100044, China; (L.H.); (Z.A.); (L.K.)
- Correspondence: (Y.W.); (Q.X.)
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Chen H, Qi G, Zhang Y, Huang Y, Zhang S, Yang D, He J, Mu L, Zhou L, Zeng M. Altered Dynamic Amplitude of Low-Frequency Fluctuations in Patients With Migraine Without Aura. Front Hum Neurosci 2021; 15:636472. [PMID: 33679354 PMCID: PMC7928334 DOI: 10.3389/fnhum.2021.636472] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 01/07/2021] [Indexed: 11/22/2022] Open
Abstract
Migraine is a chronic and idiopathic disorder leading to cognitive and affective problems. However, the neural basis of migraine without aura is still unclear. In this study, dynamic amplitude of low-frequency fluctuations (dALFF) analyses were performed in 21 patients with migraine without aura and 21 gender- and age-matched healthy controls to identify the voxel-level abnormal functional dynamics. Significantly decreased dALFF in the bilateral anterior insula, bilateral lateral orbitofrontal cortex, bilateral medial prefrontal cortex, bilateral anterior cingulate cortex, and left middle frontal cortex were found in patients with migraine without aura. The dALFF values in the anterior cingulate cortex were negatively correlated with pain intensity, i.e., visual analog scale. Finally, support vector machine was used to classify patients with migraine without aura from healthy controls and achieved an accuracy of 83.33%, sensitivity of 90.48%, and specificity of 76.19%. Our findings provide the evidence that migraine influences the brain functional activity dynamics and reveal the neural basis for migraine, which could facilitate understanding the neuropathology of migraine and future treatment.
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Affiliation(s)
- Hong Chen
- Department of Radiology, The Third Affiliated Hospital of Chengdu Medical College, Pidu District People's Hospital, Chengdu, China
| | - Guiqiang Qi
- Department of Radiology, The Third Affiliated Hospital of Chengdu Medical College, Pidu District People's Hospital, Chengdu, China
| | - Yingxia Zhang
- Department of Radiology, The Third Affiliated Hospital of Chengdu Medical College, Pidu District People's Hospital, Chengdu, China
| | - Ying Huang
- Department of Radiology, The Third Affiliated Hospital of Chengdu Medical College, Pidu District People's Hospital, Chengdu, China
| | - Shaojin Zhang
- Department of Radiology, The Third Affiliated Hospital of Chengdu Medical College, Pidu District People's Hospital, Chengdu, China
| | - Dongjun Yang
- Department of Radiology, The Third Affiliated Hospital of Chengdu Medical College, Pidu District People's Hospital, Chengdu, China
| | - Junwei He
- Department of Radiology, The Third Affiliated Hospital of Chengdu Medical College, Pidu District People's Hospital, Chengdu, China
| | - Lan Mu
- Department of Radiology, The Third Affiliated Hospital of Chengdu Medical College, Pidu District People's Hospital, Chengdu, China
| | - Lin Zhou
- Department of Radiology, The Third Affiliated Hospital of Chengdu Medical College, Pidu District People's Hospital, Chengdu, China
| | - Min Zeng
- Department of Radiology, The Third Affiliated Hospital of Chengdu Medical College, Pidu District People's Hospital, Chengdu, China
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Zhang Y, Chen H, Zeng M, He J, Qi G, Zhang S, Liu R. Abnormal Whole Brain Functional Connectivity Pattern Homogeneity and Couplings in Migraine Without Aura. Front Hum Neurosci 2020; 14:619839. [PMID: 33362498 PMCID: PMC7759668 DOI: 10.3389/fnhum.2020.619839] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 11/18/2020] [Indexed: 02/05/2023] Open
Abstract
Previous studies have reported abnormal amplitude of low-frequency fluctuation and regional homogeneity in patients with migraine without aura using resting-state functional magnetic resonance imaging. However, how whole brain functional connectivity pattern homogeneity and its corresponding functional connectivity changes in patients with migraine without aura is unknown. In the current study, we employed a recently developed whole brain functional connectivity homogeneity (FcHo) method to identify the voxel-wise changes of functional connectivity patterns in 21 patients with migraine without aura and 21 gender and age matched healthy controls. Moreover, resting-state functional connectivity analysis was used to reveal the changes of corresponding functional connectivities. FcHo analyses identified significantly decreased FcHo values in the posterior cingulate cortex (PCC), thalamus (THA), and left anterior insula (AI) in patients with migraine without aura compared to healthy controls. Functional connectivity analyses further found decreased functional connectivities between PCC and medial prefrontal cortex (MPFC), between AI and anterior cingulate cortex, and between THA and left precentral gyrus (PCG). The functional connectivities between THA and PCG were negatively correlated with pain intensity. Our findings indicated that whole brain FcHo and connectivity abnormalities of these regions may be associated with functional impairments in pain processing in patients with migraine without aura.
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Affiliation(s)
- Yingxia Zhang
- Department of Radiology, West China Hospital of Sichuan University, Chengdu, China.,Department of Radiology, The Third Affiliated Hospital of Chengdu Medical College, Pidu District People's Hospital, Chengdu, China
| | - Hong Chen
- Department of Radiology, The Third Affiliated Hospital of Chengdu Medical College, Pidu District People's Hospital, Chengdu, China
| | - Min Zeng
- Department of Radiology, The Third Affiliated Hospital of Chengdu Medical College, Pidu District People's Hospital, Chengdu, China
| | - Junwei He
- Department of Radiology, The Third Affiliated Hospital of Chengdu Medical College, Pidu District People's Hospital, Chengdu, China
| | - Guiqiang Qi
- Department of Radiology, The Third Affiliated Hospital of Chengdu Medical College, Pidu District People's Hospital, Chengdu, China
| | - Shaojin Zhang
- Department of Radiology, The Third Affiliated Hospital of Chengdu Medical College, Pidu District People's Hospital, Chengdu, China
| | - Rongbo Liu
- Department of Radiology, West China Hospital of Sichuan University, Chengdu, China
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11
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Zeng M, Yu M, Qi G, Zhang S, Ma J, Hu Q, Zhang J, Li H, Wu H, Xu J. Concurrent alterations of white matter microstructure and functional activities in medication-free major depressive disorder. Brain Imaging Behav 2020; 15:2159-2167. [PMID: 33155171 DOI: 10.1007/s11682-020-00411-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 08/18/2020] [Accepted: 10/14/2020] [Indexed: 01/08/2023]
Abstract
Although numerous studies have revealed the structural and functional alterations in major depressive disorder (MDD) using unimodal diffusion magnetic resonance imaging (MRI) or functional MRI, however, the potential associations between changed microstructure and corresponding functional activities in the MDD has been largely uninvestigated. Herein, 27 medication-free MDD patients and 54 gender-, age-, and educational level-matched healthy controls (HC) were used to investigate the concurrent alterations of white matter microstructure and functional activities using tract-based spatial statistics (TBSS) analyses, fractional amplitude of low-frequency fluctuation (fALFF), and degree centrality (DC). The TBSS analyses revealed significantly decreased fractional anisotropy (FA) in the superior longitudinal fasciculus (SLF I) in the MDD patients compared to HC. Correlation analyses showed that decreased FA in the SLF I was significantly correlated with fALFF in left pre/postcentral gyrus and binary, weighted DC in right posterior cerebellum. Moreover, the fALFF in left pre/postcentral gyrus significantly reduced in MDD patients while binary and weighted DC in right posterior cerebellum significantly increased in MDD patients. Our results revealed concurrent structural and functional changes in MDD patients suggesting that the underlying structural disruptions are an important indicator of functional abnormalities.
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Affiliation(s)
- Min Zeng
- Department of Radiology, Pidu District People's Hospital, Chengdu, 625014, Chengdu, China
| | - Min Yu
- Department of Neonatology, Changzhou Children's Hospital, Changzhou, 213003, China
| | - Guiqiang Qi
- Department of Radiology, Pidu District People's Hospital, Chengdu, 625014, Chengdu, China
| | - Shaojin Zhang
- Department of Radiology, Pidu District People's Hospital, Chengdu, 625014, Chengdu, China
| | - Jijian Ma
- Department of Radiology, Pidu District People's Hospital, Chengdu, 625014, Chengdu, China
| | - Qingmao Hu
- Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, 518055, Shenzhen, China.,CAS Key Laboratory of Human-Machine Intelligence-Synergy Systems, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, 518055, Shenzhen, China
| | - Jinhuan Zhang
- Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, 518055, Shenzhen, China.,The Fourth Clinical Medical College of Guangzhou University of Chinese Medicine, 518000, Shenzhen, China
| | - Hongxing Li
- Department of Neonatology, Changzhou Children's Hospital, Changzhou, 213003, China.
| | - Huawang Wu
- The Affiliated Brain Hospital of Guangzhou Medical University (Guangzhou Huiai Hospital), 510370, Guangzhou, China.
| | - Jinping Xu
- Institute of Biomedical and Health Engineering, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, 518055, Shenzhen, China.
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12
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Zeng M, Wang L, Cheng B, Qi G, He J, Xu Z, Han T, Liu C, Wang Y. Transcutaneous Spinal Cord Direct-Current Stimulation Modulates Functional Activity and Integration in Idiopathic Restless Legs Syndrome. Front Neurosci 2020; 14:873. [PMID: 32982669 PMCID: PMC7475652 DOI: 10.3389/fnins.2020.00873] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 05/25/2020] [Accepted: 07/27/2020] [Indexed: 11/13/2022] Open
Abstract
Idiopathic restless legs syndrome (RLS) is a sensorimotor disorder and is suggested to be caused by central nervous system abnormalities. Non-invasive transcutaneous spinal direct-current stimulation (tsDCS) was recently used for RLS therapy. However, the neurophysiological basis of tsDCS treatment is still unknown. In this study, we explored the neural basis of tsDCS in 15 RLS patients and 20 gender- and age-matched healthy controls using resting-state functional magnetic resonance imaging. We calculated the whole-brain voxel-wise fractional amplitude of low-frequency fluctuations (fALFF), regional homogeneity (ReHo), and weighted degree centrality (DC) to characterize the intrinsic functional activities and the local and global functional integration. We found that tsDCS can effectively improve the sleep and RLS symptoms in RLS patients. Moreover, after tsDCS therapy, the RLS patients showed decreased fALFF in the right anterior insula/temporal pole, decreased ReHo in the supplementary motor area, increased weighted DC in the left primary visual cortex, and decreased weighted DC in the right posterior cerebellum. The changed patterns were consistent with that found between RLS patients and healthy controls. The weighted DC in the left primary visual cortex after treatment and the fALFF in the right anterior insula/temporal pole before treatment were significantly and marginally correlated with sleep and RLS symptom scores, respectively. These results revealed that tsDCS can normalize the functional patterns of RLS patients and is an effective way for RLS therapy. Our findings provide the neurophysiological basis for tsDCS treatment and may facilitate understanding the neuropathology of RLS and directing other neuromodulation treatments.
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Affiliation(s)
- Min Zeng
- Department of Radiology, Pidu District People's Hospital, Chengdu, China
| | - Li Wang
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Neuromodulation, Beijing, China
| | - Bochao Cheng
- Department of Radiology, West China Second University Hospital of Sichuan University, Chengdu, China
| | - Guiqiang Qi
- Department of Radiology, Pidu District People's Hospital, Chengdu, China
| | - Junwei He
- Department of Radiology, Pidu District People's Hospital, Chengdu, China
| | - Zhexue Xu
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Neuromodulation, Beijing, China
| | - Tao Han
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Neuromodulation, Beijing, China
| | - Chunyan Liu
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Neuromodulation, Beijing, China
| | - Yuping Wang
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, China.,Beijing Key Laboratory of Neuromodulation, Beijing, China
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13
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Lu W, Qi G, Ding Z, Li X, Qi W, He F. Clinical efficacy of acellular dermal matrix for plastic periodontal and implant surgery: a systematic review. Int J Oral Maxillofac Surg 2020; 49:1057-1066. [DOI: 10.1016/j.ijom.2019.12.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 12/02/2019] [Accepted: 12/12/2019] [Indexed: 11/24/2022]
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14
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Wang H, Qi G, Zhang H, Wang X, Wu S, Wang J, Yue H. 177 Effect of dietary choline and Schizochytrium oil on DHA content in the egg yolk and egg quality during storage. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- H Wang
- Feed Research Institute of Chinese Academy of Agricultural Sciences,Beijing, China
| | - G Qi
- Feed Research Institute of Chinese Academy of Agricultural Sciences,Beijing, China
| | - H Zhang
- Feed Research Institute of Chinese Academy of Agricultural Sciences,Beijing, China
| | - X Wang
- Feed Research Institute of Chinese Academy of Agricultural Sciences,Beijing, China
| | - S Wu
- Feed Research Institute of Chinese Academy of Agricultural Sciences,Beijing, China
| | - J Wang
- Feed Research Institute of Chinese Academy of Agricultural Sciences,Beijing, China
| | - H Yue
- Feed Research Institute of Chinese Academy of Agricultural Sciences,Beijing, China
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15
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Hu M, Qi G, Wang J, Wu S, Yu H. 188 Effects of dietary supplementation of L-histidine and beta-alanine on growth performance, breast muscle carnosine content and carnosine-related enzyme mRNA expression in broiler chicks. J Anim Sci 2018. [DOI: 10.1093/jas/sky404.666] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- M Hu
- Feed Research Institute of Chinese Academy of Agricultural Sciences,Beijing, China
| | - G Qi
- Feed Research Institute of Chinese Academy of Agricultural Sciences,Beijing, China
| | - J Wang
- Feed Research Institute of Chinese Academy of Agricultural Sciences,Beijing, China
| | - S Wu
- Feed Research Institute of Chinese Academy of Agricultural Sciences,Beijing, China
| | - H Yu
- Feed Research Institute of Chinese Academy of Agricultural Sciences,Beijing, China
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Zhang Z, Su D, Zhu P, Bi X, Qi G, Wu X. Effect of different luteal support schemes on clinical outcome in frozen-thawed embryos transfer cycles. CLIN EXP OBSTET GYN 2016. [DOI: 10.12891/ceog2088.2016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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17
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Zhang Z, Su D, Zhu P, Bi X, Qi G, Wu X. Effect of different luteal support schemes on clinical outcome in frozen-thawed embryos transfer cycles. CLIN EXP OBSTET GYN 2016; 43:486-489. [PMID: 29734532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
OBJECTIVE To evaluate the clinical outcome of frozen-thawed embryo transfer (FET) when using different luteal support schemes. STUDY DESIGN Retrospective analysis of FET cycles was performed from June 2013 and December 2013. Infertile women, who underwent FET cycles utilizing embryos cryopreserved on day 3 post-insemination following an initial fresh IVF cycle. Patients were divided into three groups according to the luteal support scheme. Grade A (oral administration of progesterone, n=156), Group B (vaginal administration of progesterone, n=345), Group C (dissolved progesterone in oil with intramuscular infection, n=885), and group C was divided into two subgroups according to with (subgroup Cl, n=521) or without (subgroup C2 ,n=364) human chorionic gonadotrophi (hCG) injected intramuscularly. The authors compared patients' characteristics and the pregnancy outcomes of each group. RESULTS There was no difference in the patient characteristics of each group. There was no difference in the implantation rate or clinical and ongoing pregnancy rate among oral, vaginal, and intramuscular progesterone groups. The abortion and ectopic pregnancy rates were not significantly different among the three groups. CONCLUSION Oral progesterone in the FET cycles is convenient and has similar pregnancy outcomes compared with intramuscular or vaginal administration.
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Al-Marri MJ, Khader MM, Tawfik M, Qi G, Giannelis EP. CO₂ sorption kinetics of scaled-up polyethylenimine-functionalized mesoporous silica sorbent. Langmuir 2015; 31:3569-3576. [PMID: 25764385 DOI: 10.1021/acs.langmuir.5b00189] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Two CO2 solid sorbents based on polyethylenimine, PEI (M(n) ∼ 423 and 10K), impregnated into mesoporous silica (MPS) foam prepared in kilogram quantities via a scale-up process were synthesized and systematically characterized by a range of analytical and surface techniques. The mesoporous silica sorbent impregnated with lower molecular weight PEI, PEI-423/MPS, showed higher capacity toward CO2 sorption than the sorbent functionalized with the higher molecular weight PEI (PEI-10K/MPS). On the other hand, PEI-10K/MPS exhibited higher thermal stability than PEI-423/MPS. The kinetics of CO2 adsorption on both PEI/MPS fitted well with a double-exponential model. According to this model CO2 adsorption can be divided into two steps: the first is fast and is attributed to CO2 adsorption on the sorbent surface; the second is slower and can be related to the diffusion of CO2 within and between the mesoporous particles. In contrast, the desorption process obeyed first-order kinetics with activation energies of 64.3 and 140.7 kJ mol(-1) for PEI-423/MPS and PEI-10K/MPS, respectively. These studies suggest that the selection of amine is critical as it affects not only sorbent capacity and stability but also the energy penalty associated with sorbent regeneration.
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Affiliation(s)
- M J Al-Marri
- †Gas Processing Center, College of Engineering, Qatar University, P.O. Box 2713, Doha, Qatar
| | - M M Khader
- †Gas Processing Center, College of Engineering, Qatar University, P.O. Box 2713, Doha, Qatar
| | - M Tawfik
- †Gas Processing Center, College of Engineering, Qatar University, P.O. Box 2713, Doha, Qatar
| | - G Qi
- ‡Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
| | - E P Giannelis
- ‡Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853, United States
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Khader MM, Al-Marri MJ, Ali S, Qi G, Giannelis EP. Adsorption of CO<sub>2</sub> on Polyethyleneimine 10k—<i>Mesoporous silica</i> Sorbent: XPS and TGA Studies. ACTA ACUST UNITED AC 2015. [DOI: 10.4236/ajac.2015.64026] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Abstract
Bio-inspired laminated graphite nanosheets/copper composites with modified mechanical properties.
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Affiliation(s)
- P. Wang
- Shanghai Hiwave Advanced Materials Technology Co., Ltd
- Shanghai 200240
- P. R. China
| | - W. Liu
- Shanghai Hiwave Advanced Materials Technology Co., Ltd
- Shanghai 200240
- P. R. China
| | - L. Chen
- Shanghai Hiwave Advanced Materials Technology Co., Ltd
- Shanghai 200240
- P. R. China
| | - C. Mu
- Wenzhou Hongfeng Electrical Alloy Co., Ltd
- Wenzhou 325603
- P. R. China
| | - G. Qi
- Wenzhou Hongfeng Electrical Alloy Co., Ltd
- Wenzhou 325603
- P. R. China
| | - F. Bian
- Shanghai Synchrotron Radiation Facility
- Shanghai Institute of Applied Physics Chinese Academy of Sciences
- Shanghai 201204
- P. R. China
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21
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Tam AMW, Qi G, Srivastava AK, Wang XQ, Fan F, Chigrinov VG, Kwok HS. Enhanced performance configuration for fast-switching deformed helix ferroelectric liquid crystal continuous tunable Lyot filter. Appl Opt 2014; 53:3787-3795. [PMID: 24921146 DOI: 10.1364/ao.53.003787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Accepted: 05/05/2014] [Indexed: 06/03/2023]
Abstract
In this paper, we present a novel design configuration of double DHFLC wave plate continuous tunable Lyot filter, which exhibits a rapid response time of 185 μs, while the high-contrast ratio between the passband and stop band is maintained throughout a wide tunable range. A DHFLC tunable filter with a high-contrast ratio is attractive for realizing high-speed optical processing devices, such as multispectral and hyperspectral imaging systems, real-time remote sensing, field sequential color display, and wavelength demultiplexing in the metro network. In this work, an experimental prototype for a single-stage DHFLC Lyot filter of this design has been fabricated using photoalignment technology. We have demonstrated that the filter has a continuous tunable range of 30 nm for a blue wavelength, 45 nm for a green wavelength, and more than 50 nm for a red wavelength when the applied voltage gradually increases from 0 to 8 V. Within this tunable range, the contrast ratio of the proposed double wave plate configuration is maintained above 20 with small deviation in the transmittance level. Simulation and experimental results showed the proposed double DHFLC wave plate configuration enhances the contrast ratio of the tunable filter and, thus, increases the tunable range of the filter when compared with the Lyot filter using a single DHFLC wave plate. Moreover, we have proposed a polarization insensitive configuration for which the efficiency of the existing prototype can theoretically be doubled by the use of polarization beam splitters.
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Wang H, Zhao Y, Ma J, Zhang G, Mu Y, Qi G, Fang Z, Wang L, Fan Q, Ma Z. Short Communication The genetic variant rs401681C/T is associated with the risk of non-small cell lung cancer in a Chinese mainland population. Genet Mol Res 2013; 12:67-73. [DOI: 10.4238/2013.january.22.5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Ren J, Yang M, Qi G, Zheng J, Jia L, Cheng J, Tian C, Li H, Lin X, Du J. Proinflammatory protein CARD9 is essential for infiltration of monocytic fibroblast precursors and cardiac fibrosis caused by Angiotensin II infusion. Am J Hypertens 2011; 24:701-7. [PMID: 21436792 PMCID: PMC3139445 DOI: 10.1038/ajh.2011.42] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Background Angiotensin II (Ang II)–induced cardiac remodeling with the underlying mechanisms involving inflammation and fibrosis has been well documented. Cytosolic adaptor caspase recruitment domain 9 (CARD9) has been implicated in the innate immune response. We aimed to examine the role of CARD9 in inflammation and cardiac fibrosis induced by Ang II. Methods Two-month-old CARD9-deficient (CARD9−/−) and wild-type (WT) male mice were infused with Ang II (1,500 ng/kg/min) or saline for 7 days. Heart sections were stained with hematoxylin and eosin and Masson trichrome and examined by immunohistochemistry; and activity and protein levels were measured in macrophages obtained from mice. Results WT mice with Ang II infusion showed a marked increase in CARD9+ macrophages in the heart, but CARD9−/− mice showed significantly suppressed macrophage infiltration and expression of proinflammatory cytokines, including interleukin-1β (IL-1β) and connective tissue growth factor (CTGF). Importantly, Ang II–induced cardiac fibrosis (extracellular matrix and collagen I deposition) was diminished in CARD9−/− hearts, as was the expression of transforming growth factor-β (TGF-β) and level of myofibroblasts positive for α-smooth muscle actin (α-SMA). Furthermore, Ang II activation of nuclear factor-κB (NF-κB), JNK and p38 mitogen-activated protein kinases (MAPKs) in WT macrophages was reduced in CARD9−/− macrophages. Conclusion CARD9 plays an important role in regulating cardiac inflammation and fibrosis in response to elevated Ang II.
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Qi G, Lan N, Ma X, Yu Z, Zhao X. Controlling Myzus persicae with recombinant endophytic fungi Chaetomium globosum expressing Pinellia ternata agglutinin. J Appl Microbiol 2011; 110:1314-22. [DOI: 10.1111/j.1365-2672.2011.04985.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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25
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Qi G, Lu J, Zhang P, Li J, Zhu F, Chen J, Liu Y, Yu Z, Zhao X. The cry1Ac gene of Bacillus thuringiensis ZQ-89 encodes a toxin against long-horned beetle adult. J Appl Microbiol 2011; 110:1224-34. [DOI: 10.1111/j.1365-2672.2011.04974.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kwong W, Neilson AL, Hamilton RM, Chiu CC, Stephenson EA, Gross GJ, Soucie L, Kirsh JA, xian-hui Z, Bao-peng T, Jin-xin L, Yu Z, Yan-yi Z, Jiang-hua Z, Hirahara T, Sugawara Y, Suga C, Ako J, Momomura S, Ardashev AV, Zhelyakov EG, Konev AV, Rybachenko MS, Belenkov YN, Bai R, Di Biase L, Santangeli P, Saenz LC, Verma A, Sanchez J, Tondo C, Natale A, Safari F, Hajizadeh S, Mani A, Khoshbaten A, Foadoddini M, Forush SS, Bayat G, Kim SH, Chong D, Ching CK, Liew R, Galalardin, Khin MW, Teo WS, Chong D, Tan BY, Liew R, Ching CK, Teo WS, Sakamoto T, Al Mehairi M, Al Ghamdi SA, Dagriri K, Al Fagih A, Selvaraj R, Ezhumalai B, Satheesh S, Ajit A, Gobu P, Balachander J, Liu XQ, Zhou X, Yang G, Zhong GZ, Shi L, Tian Y, Li YB, Wang AH, Yang XC, Takenaka S, Ozaki H, Nakamura M, Otsuka M, Tsurumi Y, Nolker G, Gutleben KJ, Ritscher G, Sinha AM, Muntean B, Heintze J, Vogt J, Brachmann J, Horstkotte D, Katsuyuki T, Katsuyuki T, McGrew F, Johnson E, Coppess M, Fan I, Li S, Zhiyu L, Zengzhang L, Xianbin L, Yuehui Y, Min L, Shu-long Z, Dong C, Zhi-tao Z, Xian-jing W, Ying-xue D, Shu-Long Z, Dong C, Zhi-Tao Z, Xian-Jing W, Ying-Xue D, Liu P, Guo JH, Zhang Z, Li J, Liu HG, Zhang HC, Zvereva V, Rillig A, Meyerfeldt U, Jung W, Wei L, Qi G, Zhang Q, Xia Y, Doi A, Satomi K, Nakajima I, Makimoto H, Yokoyama T, Yamada Y, Okamura H, Noda T, Aiba T, Shimizu W, Aihara N, Kamakura S, Li Z, Zhao QY, Huang CX, Doi A, Satomi K, Nakajima I, Makimoto H, Yokoyama T, Yamada Y, Okamura H, Noda T, Aiba T, Shimizu W, Aihara N, Kamakura S, Min-Seok C, Jeong-Wook P, Young-Woong H, Sung-Eun P, Jae-Sun U, Yong-Seog O, Woo-Seung S, Ji-Hoon K, Seong-Won J, Man-Young L, Tae-Ho R, Uhm JS, Oh YS, Choi MS, Park JW, Ha YW, Park SE, Jang SW, Shin WS, Kim JH, Lee MY, Rho TH, Nielsen JB, Olesen MS, Tango M, Haunso S, Holst AG, Svendsen JH, Poci D, Thogersen AM, Riahi S, Linde P, Edvardsson N, Khoo CW, Krishnamoorthy S, Dwivedi G, Balakrishnan B, Lim HS, Lip GYH, Khoo CW, Krishnamoorthy S, Dwivedi G, Balakrishnan B, Lim HS, Lip GYH, D'Ascia S, D'ascia C, Marino V, Chiariello M, Santulli G, Music L, Anderson K, Benzaquen BS, Saponieri C, Yassin H, Fridman V, Vasavada BC, Turitto G, El-Sherif N, Saponieri C, Prabhu H, Yassin H, Fridman V, Huang Y, Vasavada BC, Turitto G, El-Sherif N, Ortega MC, Sosa ESH, Ugalde AN, Al Jamil A, Abu Siddique M, Haque KMHSS, Suga C, Hirahara T, Sugawara Y, Ako J, Momomura SI, Mlynarski R, Mlynarska A, Ilczuk G, Mlynarski R, Mlynarska A, Wilczek J, Mlynarska A, Mlynarski R, Wilczek J, Mlynarska A, Mlynarski R, Wilczek J, Sosnowski M, Kohno R, Abe H, Nagatomo T, Oginosawa Y, Minamiguchi H, Otsuji Y, Kohno R, Abe H, Minamiguchi H, Oginosawa Y, Nagatomo T, Otsuji Y, Minamiguchi H, Abe H, Kohno R, Oginosawa Y, Otsuji Y, Ekinci S, Yesil M, Bayata S, Vurgun VK, Arikan E, Postaci N, Xiaoqing R, Jielin P, Shu Z, Liang M, Fangzheng W, Takahashi K, Tokano T, Nakazato Y, Doi S, Shiozawa T, Konishi H, Hiki M, Kato Y, Komatsu S, Takahashi S, Kubota N, Tamura H, Suwa S, Ohki M, Katsumata T, Kizu K, Bito F, Sumiyoshi M, Juntendo HD, Yamada Y, Okamura H, Nakajima I, Doi A, Makimoto H, Yukoyama T, Noda T, Satomi K, Aiba T, Shimizu W, Aihara N, Kamakura S, Perna F, Leo M, Leccisotti L, Casella M, Pelargonio G, Lago M, Bencardino G, Narducci ML, Russo E, Santangeli P, Giordano A, Bellocci F, Song T, Yang J, Huang C, Zhang J, Huang C, Wu P, Yang J, Song T, Chen Y, Fan X, Wang T, Wang X, Tang Y, Wu P, Huang CX, Zhang J, Fan XR, Chen YJ, Li XW, Yang J, Song T, Chiu CC, Buescher T, Obias-Manno D, Yoo CJ, Huh J, Ortega MC, Nakanishi H, Hirata A, Wada M, Kashiwase K, Okada M, Ueda Y, Su D, Niu XL, Song AQ, Kohno R, Abe H, Minamiguchi H, Oginosawa Y, Nagatomo T, Otsuji Y, Fujii S, Yambe Y, Shiiba K, Sakakibara M, Takenaka S, Watanabe A, Wada T, Koide Y, Ikeda M, Toda H, Hashimoto K, Terasaka R, Nakahama M, Wada T, Watanabe A, Koide Y, Ikeda M, Toda H, Hashimoto K, Terasaka R, Nakahama M, Okada Y, Mizuno H, Ide H, Ueno T, Kogaki S, Ozono K, Nanto S, Statescu C, Bercea R, Sascau RA, Georgescu CA, Ortega MC, Athanas E, Ortega MC, Athanas E, Mironov NY, Bakalov SA, Jarova EA, Rodionova ES, Mironova NA, Kim J, Ahn MS, Han DC, Choo JTL, Chen CK, Tan TH, Ong KK, Kam R, Curnis A, Bontempi L, Coppola G, Cerini M, Vassanelli F, Lipari A, Gennaro F, Pagnoni C, Ashofair N, Cas LD, Gourineni V, Wong KL, Davoudi R, Hamid N, Chong D, Yew TB, Liew R, Keong CC, Siong TW, Fuke E, Shimizu H, Kimura S, Hao K, Watanabe R, Seo JB, Chung WY, Kim SH, Kim MA, Zo ZH, Krishinan S, Skuratova NA, Belyaeva LM, Bae MH, Lee JH, Lee HS, Yang DH, Park HS, Cho Y, Chae SC, Jun JE, Rychkova LV, Dolgikh VV, Zurbanova LV, Zurbanov AV, Aleksanyan A, Matevosyan A, Podosyan G, Zelveian P, Aleksanyan A, Podosyan G, Matevosyan A, Zelveian P, Choi HO, Nam GB, Kim YR, Kim KH, Kim SH, Choi KJ, Kim YH, Pakpahan HAP, Wei D, Qizhu T, Xiaofei Y, Kai G, Siting F, Ji H, Sato A, Tanabe Y, Hayashi Y, Yoshida T, Ito E, Chinushi M, Hasegawa K, Yagihara N, Iijima K, Izumi D, Watanabe H, Furushima H, Aizawa Y, Dong YX, Dong YX, Burnett JC, Chen HH, Sandberg S, Zhang Y, Chen PS, Cha YM, Mlynarski R, Mlynarska A, Wilczek J, Sosnowski M, Zhou XH, Tang BP, Li JX, Zhang Y, Li YD, Zhang JH, Arsenos P, Gatzoulis K, Gialernios T, Dilaveris P, Sideris S, Archontakis S, Tsiachris D, Christodoulos S, Feng Z, Baogui S, Li L, Ming L, Bai R, Di Biase L, Mohanty P, Hesselson AB, De Ruvo E, Gallagher PL, Minati M, Natale LCA, Tomassoni GF, Gan T, Tang B, Xu G, Li J, Zhang Y, Zhou X, Zhang Y, Hosoda J, Ishikawa T, Matsushita K, Matsumoto K, Kimura Y, Miyamoto M, Sugano T, Ishigami T, Uchino K, Kimura K, Umemura S, Nakajima I, Noda T, Shimizu W, Yokoyama T, Makimoto H, Doi A, Yamada Y, Okamura H, Satomi K, Aiba T, Aihara N, Kamakura S, Nakajima I, Noda T, Shimizu W, Kurita T, Yokoyama T, Makimoto H, Doi A, Yamada Y, Okamura H, Satomi K, Aiba T, Aihara N, Kamakura S, Wang T, Huang CX, Wang T, Huang CX, Ruan L, Zhang C, Cai S, Bai R, Liu N, Ruan Y, Quan X, Kang JK, Kim NY, Park SH, Lee JH, Park HS, Cho Y, Chae SC, Jun JE, Park WH, Sapelnikov OV, Latypov RS, Grishin IR, Mareev YV, Saidova MA, Akchurin RS, Arsenos P, Gatzoulis K, Manis G, Dilaveris P, Archontakis S, Tsiachris D, Mytas D, Papafanis T, Papavasileiou MV, Stefanadis C, Ren LN, Fang XH, Wang YQ, Qi GX, Zeng QX, Zheng ZT, Zhong JQ, Wang YL, Liu HZ, Liu DL, Meng XL, Li JS, Zhang Y, Liu HZ, Zhong JQ, Zeng QX, Liu DL, Meng XL, Li JS, Su GY, Wang J, Zhang Y, Liu HZ, Zhong JQ, Zeng QX, Wang YL, Liu DL, Meng XL, Li JS, Su GY, Zhang Y, Li JS, Zhong JQ, Zeng QX, Liu HZ, Su GY, Zhang Y, Li JS, Zhong JQ, Zeng QX, Liu HZ, Meng XL, Liu DL, Su GY, Zhang Y, Li JS, Zhong JQ, Zeng QX, Liu HZ, Meng XL, Liu DL, Su GY, Zhang Y, Nicolson WB, Kundu S, Tyagi N, Meatcher PDS, Yusuf S, Jeilan M, Stafford PJ, Sandilands AJ, Loke I, Ng GA, Nicolson WB, Kundu S, Tyagi N, Meatcher PDS, Yusuf S, Jeilan M, Stafford PJ, Sandilands AJ, Loke I, Ng GA, Solak Y, Gul EE, Atalay H, Abdulhalikov T, Kayrak M, Turk S, Kang JK, Kim NY, Park SH, Lee JH, Park HS, Cho Y, Chae SC, Jun JE, Park WH, Belyaeva LM, Skuratova NA, Pogodina AV, Dolgikh VV, Valjavskaja OV, Zurbanov AV, Chen YX, Luo NS, Wang JF, Zhang S, Ishimaru S, Miyakawa M, Kakinoki R, Tadokoro M, Kitani S, Sugaya T, Nishimura K, Igarashi T, Okabayashi H, Furuya J, Igarashi Y, Igarashi K, Su T, Winlaw D, Chard R, Nicholson I, Sholler G, Lau K, Sun Q, Cheng KP, Cheng R, Hua W, Pu JL, Zhang S, Lim CP, Chan LL, Teo LW, Kwok BWK, Sim DKL, Ching CK, Lim CP, Chan LL, Teo LW, Kwok BWK, Sim DKL, Ching CK, Curnis A, Bontempi L, Cerini M, Lipari A, Vassanelli F, Pagnoni C, Ashofair N, Moneghini D, Cestari R, Cas LD, Al Fagih A, Al Shurafa H, Al Ghamdi S, Dagriri K, Al Khadra A, Iijima K, Chinushi M, Hasegawa K, Yagihara N, Sato A, Izumi D, Watanabe H, Furushima H, Aizawa Y, Furushima H, Chinushi M, Iijima K, Izumi D, Hasegawa K, Yagihara N, Watanabe H, Sato A, Aizawa Y, Agacdiken A, Yalug I, Vural A, Celikyurt U, Ural D, Aker T, Agacdiken A, Yalug I, Vural A, Celikyurt U, Ural D, Aker T, Heintze J, Schloss E, Auricchio A, Zeng C, Sterns L, Farooqi F, Kamdar R, Adhya S, Bayne S, Jackson T, Pollock L, Sterns L, Gall N, Murgatroyd F, Guo Y, Wang Y, Yang T, Zhu P, Liu H, Zhao Y, Zhang L, Gao W, Gao M. Poster presentation. Europace 2011. [DOI: 10.1093/europace/euq492] [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] Open
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Yang H, Dib HH, Zhu M, Qi G, Zhang X. Prices, availability and affordability of essential medicines in rural areas of Hubei Province, China. Health Policy Plan 2009; 25:219-29. [DOI: 10.1093/heapol/czp056] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Qi G, Li JT, Ruan QP, Yang J, Su ZX. An optimised, small-scale preparation of high-quality RNA from dry seeds of Davidia involucrata. Phytochem Anal 2009; 20:139-142. [PMID: 19140111 DOI: 10.1002/pca.1108] [Citation(s) in RCA: 7] [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: 05/27/2023]
Abstract
INTRODUCTION The dormancy of Davidia involucrata seeds normally lasts for an extended period of time and because of this unique property the species is an excellent model for studying the molecular mechanisms of plant dormancy. The use of minimal plant material is desirable for RNA extraction since D. involucrata is a rare plant and it is relatively difficult to collect large amounts of seeds in order to perform molecular biology studies. OBJECTIVE To improve the quality of RNA obtained from seeds of D. involucrata by eliminating the oxidation of polyphenols during extraction and by preventing polysaccharides and other impurities from being extracted. METHODS A previously described method was modified by the addition of 4% (w/v) poly(N-vinyl-2-pyrrolidone) to the dry seeds during grinding and by adding 5% (v/v) beta-mercaptoethanol and 28% (v/v) ethanol to the extraction buffer. Two further centrifugation steps (5000 and 8000 rpm) were utilised and one-seventh volume of ethanol was incubated with the supernatant at 4 degrees C for 2-3 h prior to the precipitation of RNA. RESULTS Following these modifications, an effective method was established for total RNA extraction from a small amount of dry seeds of D. involucrata. The isolated RNA was shown to have high purity and integrity by gel electrophoresis and spectrophotometry, and was confirmed to be suitable for RT-PCR and the construction of cDNA libraries. CONCLUSION The modified method reduced the amount of seeds required for extraction of total DNA and was beneficial for preserving the endangered species.
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Affiliation(s)
- G Qi
- Sichuan Provincial key Laboratory of Environmental Science and Biological Diversity Conservation, China West Normal University, Nanchong, Sichuan, People's Republic of China
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Abstract
The DNA-packaging pRNA of bacterial virus phi29, which forms dimers and then hexamers, contains two independent tightly self-folded domains. Circularly permuted pRNAs were constructed without impacting pRNA folding. Connecting the pRNA 5'/3' ends with variable sequences did not disturb its folding and function. These unique features, which help prevent two common problems - exonuclease degradation and misfolding in the cell, make pRNA an ideal vector to carry therapeutic RNAs. A pRNA-based vector was designed to carry hammerhead ribozymes that cleave the hepatitis B virus (HBV) polyA signal. The chimeric HBV-targeting ribozyme was connected to the pRNA 5'/3' ends as circularly permuted pRNA. Two cis-cleaving ribozymes were used to flank and process the chimeric ribozyme. The hammerhead ribozyme including its two arms for HBV targeting was able to fold correctly while escorted by the pRNA. The chimeric ribozyme cleaved the polyA signal of HBV mRNA in vitro almost completely. Cell culture studies showed that the chimeric ribozyme was able to enhance the inhibition of HBV replication when compared with the ribozyme not escorted by pRNA, as demonstrated by Northern blot and e-antigen assays. pRNA could also carry another hammerhead ribozyme to cleave other RNA substrate. These findings suggest that pRNA can be used as a vector for imparting stability to ribozymes, antisense, and other therapeutic RNA molecules in vivo.
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Affiliation(s)
- S Hoeprich
- Department of Pathobiology and Cancer Research Center, Purdue University, west Lafayette, IN 47907, USA
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Qi G, Goloubev MY, DiBianca FA, Samant S. On modelling the kinestatic charge detector for digital radiographic diagnostic and portal imaging. J Med Eng Technol 2002; 26:193-8. [PMID: 12487709 DOI: 10.1080/03091900210142486] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The kinestatic charge detection (KCD) principle has been a digital radiography technique for more than a decade. The advances of the KCD technique have gone from diagnostic imaging to portal imaging. However, little work has been done on understanding the selection of key KCD parameters and relationships between them. In the present study, an engineering model was established that could be used to optimize the placements of key parameters in terms of KCD system mechanical design. In the proposed KCD engineering model, the basic energy conservation law was applied to the process of ion transmission. It allows for the computation of the KCD design parameters such as the optimum grid placement, high voltage board tilt angle and grid wire space, as well as to provide recommendations on high voltage board and electric potentials and their ratio.
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Affiliation(s)
- G Qi
- Department of Mechanical Engineering, The University of Memphis, Memphis, Tennessee, USA
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Qi G, Jiang P, Xu H. [Methods for making human sectional specimens]. Hunan Yi Ke Da Xue Xue Bao 2002; 24:inside back cover. [PMID: 11938801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
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He B, Zhao M, Qi G. [Activation of transcription factors and induction of cytokines from macrophages in chronic obstructive pulmonary disease]. Zhonghua Yi Xue Za Zhi 2001; 81:1360-4. [PMID: 11930628] [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: 02/24/2023]
Abstract
OBJECTIVE To investigate the activation of transcription factors and induction of cytokines from alveolar macrophages in chronic obstructive pulmonary disease (COPD). METHODS Alveolar macrophages were collected by fibrobronchoscopy from 8 patients with chronic bronchitis, 8 patients with COPD, and 8 healthy volunteers. All patients were at stable stage. The macrophages thus collected were cultured and stimulated with lipopolysaccharide (LPS, 10 micrograms/ml). The IL-8, IL-1 beta, TNF alpha and IL-6 thus produced were measured by ELISA in the supernatant. Nuclear factor-kappa B (NF kappa B), activator protein-1 (AP-1), AP-2 and AP-3 were detected by electrophoretic mobility shift assay. RESULTS The concentration of IL-8 released from macrophages of patients with COPD at stable stage before LPS stimulation was about 3 times higher than that in the healthy control (F = 4.34, P < 0.05). The concentration of IL-8 released from macrophages in patients with COPD was increased further after LPS stimulation in comparison to that in healthy controls(F = 3.56, P < 0.05). The concentration of IL-1 beta and that of TNF alpha released from macrophages of COPD patients were further increased after LPS stimulation (P < 0.05) in the COPD patients, but there was no difference in the concentration of IL-1 beta and between the control and COPD patients before LPS stimulation. The constitutive activity of AP-1 and the activity of NF kappa B induced by LPS were higher in the patients with COPD than in the controls. CONCLUSION The alverlar macrophages of patients with COPD at stable stage may release higher concentration of IL-8 and IL-1 beta. LPS stimulation increases the release of IL-1 beta and TNF alpha of alveolar macrophages. Enhancement of activity of NF kappa B and AP-1 may positively regulate the production of IL-8 and IL-1 beta in the airflow obstruction.
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Affiliation(s)
- B He
- Pulmonary Division, Department of Internal Medicine, Peking University, Third Hospital, Beijing 100083, China
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Qi G, Zhang L, Xie WL, Chen XY, Li JS. Protective effect of gypenosides on DNA and RNA of rat neurons in cerebral ischemia-reperfusion injury. Acta Pharmacol Sin 2000; 21:1193-6. [PMID: 11603299] [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: 02/21/2023] Open
Abstract
AIM To observe the protective effect of gypenosides (GP) on the neurons of hippocampus, cerebral cortex, corpus striatum, and dentate gyrus in cerebral ischemia-reperfusion injury of rats. METHODS Modified 4-vessel occlusion (4-VO) method was used to establish the model of acute global ischemia. The acridine orange (AO) staining method was used to observe the DNA and RNA contents of cerebral ischemia-reperfusion injury model in the areas. RESULTS The fluorescent intensity (reflecting DNA and RNA contents) of the DNA and RNA in the areas of cerebral ischemia-reperfusion injury was markedly abated compared with the normal control group. In the group of ig GP (100 mg/kg) it was enhanced compared with the model group and was the same as the normal control group. CONCLUSION The injury of the DNA and RNA in the areas of ischemia-reperfusion model was decreased by GP.
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Affiliation(s)
- G Qi
- Department of Pharmacology, Medical College of CPAPF, Tianjin 300162, China
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Abstract
This study addresses the visualization of crack locations in bone-cement material using a three-dimensional acoustic emission source location technique. Computer software based on an earthquake location technique was developed to determine AE source locations and was used to investigate material cracks formed at the tip of a notch in bone cement. The computed locations show that the cracks form linear features with dimensions between 0.1 and 0.2 mm although larger linear features (almost 3.5 mm) also are present. There is a difference of about 2.5 mm between the average of the event locations, and the location of the tip of the notch is 2.5 mm, which may be due to the finite size of the sensors (5 mm in diameter).
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Affiliation(s)
- G Qi
- Department of Mechanical Engineering, Engineering Science 320, The University of Memphis, Memphis, Tennessee 38152-6576, USA.
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Abstract
This article addresses acoustic emission (AE) wave attenuation in acrylic bone cement and wave attenuation due to the existence of material interface between acrylic bone cement and sawbone. In this article, a series of tests were performed using standard pencil lead break sources. The attenuation features inside acrylic bone cement and sawbone materials and the attenuation due to the existence of material interfaces such as cement-cement and cement-sawbone were studied. In addition, the discrete wavelet-based signal energy decomposition method was introduced to examine detail breakdown of signal energy distribution of attenuation. From the tests, it was observed that the attenuation of AE signal was linear with respect to the wave travel distance for both energy and amplitude. Furthermore, AE energy attenuation was more sensitive than AE amplitude attenuation. In the analysis of attenuation due to material interfaces, the couplant plays a major role in reducing the attenuation at the interfaces. The attenuation at an interface composed by different material is less compared with an interface composed by the same material.
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Affiliation(s)
- G Qi
- Department of Mechanical Engineering, University of Memphis, Memphis, Tennessee 38152-6576, USA
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Xu C, Chen B, Wang W, Tian Y, Zhao H, Jiang B, Gao B, Qin S, Yue M, Qi G. Detecting residual ischemia and identifying coronary artery disease after myocardial infarction using dobutamine technetium-99m-MIBI SPECT. Chin Med J (Engl) 2000; 113:579-83. [PMID: 11776021] [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: 02/23/2023] Open
Abstract
OBJECTIVE To evaluate dobutamine technetium-99m methoxy isobutyl nitrile (sestamibi) single-photon emission computed tomography (Dobu-ECT) in detecting residual ischemia and identifying coronary vessel disease after myocardial infarction. METHODS Sixty-two patients with confirmed myocardial infarction were studied with Dobu-ECT at the time of coronary artery angiography. Dobutamine was administered intravenously in incremental rates from 5 to 40 micrograms.kg-1.min-1 at 3-minute intervals. At the highest infusion rate, 7.4 x 10(8) Bq 99mTc-MIBI was injected intravenously, and tomographic imaging was performed after one hour. Resting images were taken after 24 hours, with a second dose of 99mTc-MIBI. RESULTS The sensitivity of Dobu-ECT in detecting residual ischemia of myocardial infarction was 76%, which was higher than dobutamine electrocardiography (Dobu-ECG). Regardless of the single-, double- or triple-vessel diseases, Dobu-ECT was superior to Dobu-ECG in identifying residual ischemia (56% vs 4%, 86% vs 27%, 100% vs 47%, P < 0.01, respectively). The incidence of residual ischemia in patients receiving thrombolytic therapy was 67%, lower than patients without thrombolysis (72%) or those with an old myocardial infarction (94%). But the differences were not statistically significant. Dobu-ECT detected only 56% of ischemias in non-infarct related myocardium. Eighty-two percent of all significantly stenosed vessels were detected with Dobu-ECT, and 84% of patients with multivessel disease could be accurately identified. The sensitivity of Dobu-ECT was significantly greater for detecting severe stenosis over moderate stenosis. The sensitivity for detecting stenosis in the right coronary artery was greater than left anterior descending or left circumflex, but its specificity was lower. CONCLUSION Dobu-ECT can identify residual ischemia, as well as its location and extent after myocardial infarction. Dobu-ECT can also accurately detect significantly stenosed vessels.
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Affiliation(s)
- C Xu
- Department of Cardiology, People's Hospital, Beijing Medical University, Beijing 100044, China
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Abstract
CONTEXT As the world's largest producer and consumer of tobacco products, China bears a large proportion of the global burden of smoking-related disease and may be experiencing a tobacco epidemic. OBJECTIVE To develop an evidence-based approach supporting tobacco control initiatives in China. DESIGN AND SETTING A population-based survey consisting of a 52-item questionnaire that included information on demographics, smoking history, smoking-related knowledge and attitudes, cessation, passive smoke exposure, and health status was administered in 145 disease surveillance points in the 30 provinces of China from March through July 1996. PARTICIPANTS A nationally representative random sample of 128766 persons aged 15 to 69 years were asked to participate; 120298 (93.8%) provided data and were included in the final analysis. About two thirds of those sampled were from rural areas and one third were from urban areas. MAIN OUTCOME MEASURES Current smoking patterns and attitudes; changes in smoking patterns and attitudes compared with results of a previous national survey conducted in 1984. RESULTS A total of 41187 respondents smoked at least 1 cigarette per day, accounting for 34.1% of the total number of respondents, an increase of 3.4 percentage points since 1984. Current smoking continues to be prevalent among more men (63%) than women (3.8%). Age at smoking initiation declined by about 3 years for both men and women (from 28 to 25 years). Only a minority of smokers recognized that lung cancer (36%) and heart disease (4%) can be caused by smoking. Of the nonsmokers, 53.5% were exposed to environmental tobacco smoke at least 15 minutes per day on more than 1 day per week. Respondents were generally supportive of tobacco control measures. CONCLUSION The high rates of smoking in men found in this study signal an urgent need for smoking prevention and cessation efforts; tobacco control initiatives are needed to maintain or decrease the currently low smoking prevalence in women.
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Affiliation(s)
- G Yang
- Chinese Academy of Preventive Medicine and Chinese Association on Smoking and Health, Beijing
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Qi G, Zeng D, Liu L, Zhao A, Xu P. [The effects of Xuezhikang on neointimal proliferation and C-myc gene expression after angioplasty in rabbits]. Zhonghua Nei Ke Za Zhi 1999; 38:514-6. [PMID: 11798686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To investigate the effects of Xuezhikang (XZhK) on the neointimal proliferation and C-myc gene expression after angioplasty in rabbits. METHODS Angioplasty for atherosclerotic stenosis of celiac arteries was performed in 30 male white rabbits after being fed with cholesterol-supplemented diet for 8 weeks, which were then randomized to control group, high-cholesterol group and XZhK group. After 4 weeks, the local vessels were collected for morphological observation. C-myc mRNA level was measured with RT-PCR and C-myc protein with immunohistochemical analysis. RESULTS Morphological observation showed that the neointimal area in the XZhK group were less than the control group (P < 0.05), and that in control group were less than that in the high-cholesterol group (P < 0.05). The levels of C-myc mRNA measured with RT-PCR and the percentage of C-myc protein positive cell by immunohistochemical analysis were lower in the XZhK group than in the control and high-cholesterol group (P < 0.05), The levels in the latter two groups showed no difference (P > 0.05). CONCLUSION XZhK can inhibit the neointimal proliferation and the expression of C-myc gene after angioplasty in rabbits.
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Affiliation(s)
- G Qi
- Department of Cardiology, The First Affiliated Hospital of China Medical University, Shenyang 110001
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40
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Wu Z, Qi G, Zeng Y, Detels R. Knowledge of HIV/AIDS among health care workers in China. AIDS Educ Prev 1999; 11:353-363. [PMID: 10494359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
This study was designed to assess knowledge of AIDS among health professionals in China via a cross-sectional survey. A self-administered questionnaire requesting demographic characteristics and basic AIDS knowledge was given to health professionals in 11 provinces, cities, and autonomous regions. Questionnaires were completed by 1,400 of 1,500 (93%) health professionals surveyed. The percentages of correct answers ranged from 3% to 68%. Findings included that public health workers had more knowledge than clinicians; having attended training workshops was not associated with an adequate levels of knowledge; and knowledge differed by professional level and by the geographic region in which they worked. Although most health professionals questioned knew that AIDS is caused by an infectious agents, their knowledge of transmission routes, the "window period" and the length of the incubation period is still inadequate. Thus, health professionals in China urgently need both more training and more effective training. The effectiveness of future HIV/AIDS workshops should be evaluated.
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Affiliation(s)
- Z Wu
- National Center for AIDS Prevention and Control, Chinese Academy of Preventive Medicine, Beijing, China
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41
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Zhu J, Leng X, Dong N, Qi G, Du R. [Measurement of liver volume and its clinical significance in cirrhotic patients]. Zhonghua Wai Ke Za Zhi 1999; 37:110-2. [PMID: 11829797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To evaluate whether, preoperative measurement of liver volume is of value to the evaluation of tolerance to operation and long-term prognosis in cirrhotic patients with portal hypertension. METHODS We assessed liver volume in 18 cirrhotics and 31 noncirrhotic controls with 3-dimensional shaded surface display by CT twin. RESULTS The liver volume in controls was positively correlated to the height (r = 0.42, P < 0.05). The average of liver volume in controls was (1 070.68 +/- 227.52) cm(3) and was different from that of cirrhotics (797.02 +/- 135.11) cm(3) (P < 0.05). Liver volume of cirrhotic patients with portal hypertension was related to their Child classification. The liver volume of patients in Child C group was significantly smaller than that of patients of Child B group. CONCLUSIONS The patients with smaller liver volume are likely complicated by encephalopathy after shunting procedure. However, the liver volume is not significantly correlated with portal blood flux and portosystemic shunt index.
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Affiliation(s)
- J Zhu
- Department of Surgery, People's Hospital, Beijing Medical University, Beijing 100044
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42
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Yu H, Zhao M, Yao W, Qi G, Zhao C. [The effects of inhaled bronchodilators on central inspiratory drive in patients with COPD]. Zhonghua Jie He He Hu Xi Za Zhi 1999; 22:76-8. [PMID: 11820944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To evaluate the effects of inhaled bronchodilators on the central inspiratory drive in patients with COPD. METHODS 91 patients with COPD were divided into three groups (A, B, C) randomly. Lung functions and P(0.1) were measured at baseline and 20 min and 60 min after inhalation (A: albuterol; B: iprotropium; C: albuterol + iprotropium). RESULTS P(0.1) decreased after inhalation in all three groups (P < 0.05 approximately 0.001). A positive correlation between DeltaP(0.1) and DeltaFRC was found in the three groups (r = 0.4325 - 0.5230, P < 0.05 approximately 0.01). V(E)/P(0.1) increased in the three groups after inhalation (P < 0.05 approximately 0.005). There was significant improvement of V(E)/P(0.1) in group B and C as compared with that of group A (P < 0.05, P < 0.001); There was a different correlative factor with V(E)/P(0.1) in group B and C. CONCLUSIONS (1) P(0.1) decreased after inhalation, It may be caused by decreased FRC. (2) V(E)/P(0.1) became appropriate after inhalation in all groups; The improvement in group B and C was superior to that of group A. There may be different mechanisms to improve V(E)/P(0.1) by different inhalators.
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Affiliation(s)
- H Yu
- The Third Affiliated Hospital of Beijing Medical University, Beijing 100083
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43
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Yuan Y, Zhang J, Scanlon KJ, Lu Z, Qi G. Reversion of multidrug resistance in the P-glycoprotein positive breast cancer cell line (MCF-7/ADR) by introduction of hammerhead ribozyme. Chin Med Sci J 1998; 13:24-8. [PMID: 11717919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/17/2023]
Abstract
A hammerhead ribozyme which site-specifically cleaved the GUC position in codon 880 of the mdr1 mRNA was designed. The target site was chosen between the two ATP binding sites, which may be important for the function of the P-Gp as an ATP-dependent pump. A DNA sequence encoding the ribozyme gene was then incorporated into a eukaryotic expression vector (pH beta Apr-1 neo) and transfected into the breast cancer cell line MCF-7/Adr, which is resistant to adriamycin and expresses the MDR phenotype. The ribozyme was stably expressed in the cell line by the RNA dot blotting assay. The result of Northern blot assay showed that the expressed ribozyme could decrease the level of mdr1 mRNA expression by 83.5%; and the expressed ribozyme could inhibit the formation of P-glycoprotein detected by immuno-cytochemistry assay and could reduce the cell's resistance to adriamycin; this means that the resistant cells were 1,000-fold more resistant than the parental cell line (MCF-7), whereas those cell clones that showed ribozyme expression were only 6-fold more resistant than the parental cell line. These results show that a potentially useful tool is at hand which may inactivate MDR1 mRNA and revert the multidrug resistance phenotype.
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MESH Headings
- ATP Binding Cassette Transporter, Subfamily B, Member 1/biosynthesis
- Breast Neoplasms/metabolism
- Breast Neoplasms/pathology
- Doxorubicin/pharmacology
- Drug Resistance, Multiple/genetics
- Drug Resistance, Neoplasm/genetics
- Genes, MDR
- Humans
- RNA, Catalytic/biosynthesis
- RNA, Catalytic/genetics
- RNA, Messenger/biosynthesis
- RNA, Messenger/genetics
- Transfection
- Tumor Cells, Cultured
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Affiliation(s)
- Y Yuan
- Department of Oncology, Zhujiang Hospital, First Military Medical University, Guangzhou 510282
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44
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Abstract
A collection of clinical data is reported on nonagenarians in comparison to an 'average' population of younger age. The results of these clinical data indicated that a vital physiological basis for long life span probably existed. The basis include a better micro-blood-flow state, a better cardiac, immune (nature killer cell activity), adrenocortical, hepatic and renal function, and a higher level of high density lipoprotein cholesterol. It is suggested that the method, including Chinese traditional medicine, to improve the micro-blood-flow, nature killer cell activity, high density lipoprotein cholesterol and vital organ function may be beneficial for life preservation and aging retarding.
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Affiliation(s)
- Y X Ma
- Department of Aging and Antiaging, Shanghai Institute of Gerontology and Geriatrics, Huadong Hospital, People's Republic of China.
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45
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Zhou Y, Leng X, Qi G. [Gastric mucosal hemodynamics of prehepatic portal hypertensive rat model]. Zhonghua Yi Xue Za Zhi 1997; 77:286-9. [PMID: 9596931] [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: 02/07/2023]
Abstract
OBJECTIVE To observe the changes of gastric mucosal hemodynamics and discuss the possible regulatory factors of prehepatic portal hypertensive rat. METHOD Prehepatic portal hypertensive (PHT) rat model was produced by various degree of portal vein constriction, and gastric mucosal hemodynamics was measured by radioactive microsphere technique. Statistical analysis was performed by ANOVA, the student t test, and linear correlation. RESULT The gastric mucosal blood flow was significantly reduced in PHT rats, whereas the blood flow in submucosa, muscular layer prominently increased. The resistance of mucosal vasculature was elevated in PHT rats, however, that of submucosa and muscular layer was decreased remarkably. There was a negative correlation between the gastric mucosal blood flow and portal pressure. CONCLUSION The gastric mucosa of prehepatic portal hypertensive rat model is poorly perfused prominently. It may be due to the increased mucosal vascular resistance and elevated portal pressure.
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Affiliation(s)
- Y Zhou
- Affiliated Hospital, Qingdao Medical College
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46
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Zhou YB, Leng X, Qi G. [Portal-systemic shunting and hemodynamics of prehepatic portal hypertensive rat models]. Zhonghua Wai Ke Za Zhi 1997; 35:244-7. [PMID: 10374550] [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: 02/12/2023]
Abstract
Hemodynamics and relationship between portal-systemic shunting and portal pressure were measured by radioactive microsphere techniques in 31 rats after various degree portal vein constriction. Prominent hyperdynamic state was present in prehepatic portal hypertensive rats models. Both cardiac output and index were increased, the mean arterial pressure and pripheral resistance were reduced significantly. The total splanchnic blood flow was increased but splanchnic resistance reduced remarkably. Portal-systemic shunting flow was higher. There was a significant positive correlation between them, Y = 26.14 + 5.32X (r = 0.76, P < 0.001). For this reason, elevated systemic and portal venous flow provided main impetus for maintaining portal hypertension.
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Affiliation(s)
- Y B Zhou
- People's Hospital, Beijing Medical University
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47
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Qi G, Guo G, Cao Y. [Experimental studies of high frequency jet ventilation improved by enhancing expiratory turbulence]. Zhonghua Yi Xue Za Zhi 1996; 76:818-21. [PMID: 9275530] [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: 02/05/2023]
Abstract
OBJECTIVE To improve the effect on CO2 elimination during high frequency jet ventilation by enhancing expiratory turbulence. METHODS Nine healthy dogs with steam-induced type I respiratory failure were basically applied with high frequency jet ventilation (HFJV), and high frequency two-way jet ventilation (HFTJV), HFJV combined with thoracicoabdominal compression (HFJV+TAC), and HFJV combined with thoracicoabdominal compression-decompression (HFJV+ TACD) randomly for 30 min, respectively. The parameters were determined and the Reynolds numbers (NR) were calculated. RESULTS Reynolds numbers were more than 3000 in all patterns, suggesting that the airflow was turbulent. Expiratory Na was higher. The NR of the latter three patterns was more significantly higher than that of HFJV (P < 0.01). CO2 elimination was 126, 111, 137 ml. min-1 in the latter three patterns, respectively and significant (P < 0.05) or very significant (P < 0.01) compared with 98.0 ml.min-1 in HFJV. Corresponding changes occurred in PaCO2. NO significant differences (P > 0.05) were observed in hemodynamic parameters. CONCLUSION HFJV combined with inverse jet or thoracicoabdominal compression or decompression on expiratory phase could enhance expiratory turbulence and facilitate CO2 elimination in 9 dogs with steam-induced type I respiratory failure.
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Affiliation(s)
- G Qi
- First Affiliated Hospital, Jiangxi Medical College, Nanchang
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48
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Qi G, Zhang L, Li C. [Influence of gypenoside on serum lipoprotein and atherosclerosis in hyperlipidaemia animals]. Zhongguo Zhong Yao Za Zhi 1996; 21:562-4 inside back cover. [PMID: 9772651] [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: 02/09/2023]
Abstract
The result of the study indicates that gypenoside (GP, i.g.) can suppress the rise of serum cholesterol (CHO) and triglyceride (TRIG) in hyperlipidaemia mice and lower the content of CHO, TRIG and LDL in hyperlipidaemia quails. The study also shows that GP has a protective effect on diffuse lipoidosis in liver and atherosclerosis in hyperlipidaemia quails, and that GP can lower the lipoprotein levels in hyperlipidaemia animals.
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Affiliation(s)
- G Qi
- Department of Biochemistry Pharmacology, Beijing Medical University
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49
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Qi B, Qi G, Xuo H. [Surgical treatment of ventricular septal defect complicated by pulmonary hypertension at high altitude]. Zhonghua Wai Ke Za Zhi 1996; 34:267-9. [PMID: 9387699] [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: 02/05/2023]
Abstract
103 patients (52 males, 51 females) suffered from ventricular septal defect associated with pulmonary hypertension were operated on under sardiopulmonary bypass from 1981-1995 at high altitude. The age of the patients ranged from 2 to 29 years. The ratio of pulmonary systemic arterial pressure was more than 0.91 (0.91 to 1.21). The defects were closed by using dacron patch. The operative mortality was 4.8% among the survivals. 98 patients were followed up for a period from 3 months to 3 years (mean 2.4 years). Excellent results were observed in 93 patients, and good in 4. There was a late death. On account of the improvement in surgical technique, myocardial protection and postoperative care, the result of operation was improved markedly.
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Affiliation(s)
- B Qi
- Qinghai Cardiovascular Hospital, Xining
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50
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Zhao M, Qi G, Mu K. [Comparative observation on the relationship between the MEFV and the visual inspection of small airway]. Zhonghua Jie He He Hu Xi Za Zhi 1996; 19:18-21. [PMID: 9275382] [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: 02/05/2023]
Abstract
OBJECTIVE To compare the relationship between the MEFV and the visual inspection of small airway. METHODS According to the result on small airway function test (MEFV), the patients were divided into two group: MEFV abnormal group and MEFV normal group. Their bronchus and peripheral airway were observed with bronchofiberscope and ultra-thin bronchofiberscope. The visual appearance of the airways was scored in the light of the presence or absence of erythema, edema, secretions, etc. RESULTS The score of visual appearance observed or bronchitis index (BI) in small airway was 7.7 +/- 0.8 (BI: 3.0 +/- 0.8) and 4.7 +/- 1.6 (BI: 1.5 +/- 0.5) respectively in MEFV abnormal group and in MEFV normal group, namely the score in MEFV abnormal group was significantly higher than that of normal group (P < 0.01). The degree of pathological change in small airway was significantly correlated with the results of V25, V50, r = -0.6271, (P < 0.05) and r = 0.6964, (P < 0.02). CONCLUSION The abnormal of MEFV may reflect inflamative pathological changes of small airway.
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Affiliation(s)
- M Zhao
- Department of Respiratory Disease, 3rd Hospital, Beijing Medical University
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