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Zhang QY, Jin B, Feng Y, Qian K, Wang H, Wan C, Xu PF, Zhang M, Jiang CM. [Etiological diagnostic value of metagenomic next-generation sequencing in peritoneal dialysis-related peritonitis]. Zhonghua Gan Zang Bing Za Zhi 2023; 39:8-12. [PMID: 36776009 DOI: 10.3760/cma.j.cn441217-20220729-00748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
Objective: To explore the etiological diagnostic value of metagenomic next-generation sequencing (mNGS) in peritoneal dialysis (PD)-related peritonitis. Methods: The study was a retrospective cohort study. The clinical data of patients with PD-related peritonitis who were treated and underwent microbial cultivation and mNGS test at the same time from June 2020 to July 2021 in the Affiliated Drum Tower Hospital, Medical School of Nanjing University were analyzed. The positive rate, detection time and consistency between mNGS test and traditional microbial culture were compared. Results: A total of 18 patients with age of (50.4±15.4) years old and median dialysis time of 34.0 (12.4, 62.0) months were enrolled in the study, including 11 males and 7 females. Pathogenic microorganisms were isolated in 17 patients by mNGS test, with a positive rate of 17/18, which was higher than 13/18 of microbial culture, but the difference was not statistically significant (P=0.219). Both mNGS test and microbial culture isolated positive pathogenic bacteria in 12 patients, and mNGS test isolated the same types of pathogenic bacteria as microbial cultivation did in 11 patients. In five patients with negative microbial culture, mNGS test also isolated pathogenic microorganisms, including 3 cases of Staphylococcus epidermidis, 1 case of Mycobacterium tuberculosis and 1 case of Ureaplasma urealyticum. In 1 patient, microbial culture isolated pathogenic bacteria (Escherichia coli) whereas mNGS test did not. The detection time of mNGS was 25.0 (24.0, 27.0) h, which was significantly shorter than 89.0 (72.8, 122.0) h of microbial culture (Z=3.726, P<0.001). Conclusions: mNGS test can improve the detection rate of pathogenic microorganisms in PD-related peritonitis and greatly shorten the detection time, and has good consistency with microbial culture. mNGS may provide a new approach for pathogen identification of PD-related peritonitis, especially refractory peritonitis.
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Affiliation(s)
- Q Y Zhang
- Department of Nephrology, the Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - B Jin
- Department of Nephrology, the Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - Y Feng
- Department of Nephrology, the Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - K Qian
- Department of Nephrology, the Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - H Wang
- Department of Nephrology, the Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - C Wan
- Department of Nephrology, the Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - P F Xu
- Department of Nephrology, the Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - M Zhang
- Department of Nephrology, the Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China
| | - C M Jiang
- Department of Nephrology, the Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing 210008, China
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Du M, Liu ZQ, Song FY, Qian K, Chen XB. [Clinical and genetic characteristics of congenital isolated adrenocorticotropic hormone deficiency]. Zhonghua Er Ke Za Zhi 2022; 60:706-709. [PMID: 35768360 DOI: 10.3760/cma.j.cn112140-20211222-01067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To investigate the clinical and genetic characteristics of congenital isolated adrenocorticotropic hormone (ACTH) deficiency. Methods: The clinical and laboratory characteristics of 5 cases with congenital isolated ACTH deficiency diagnosed in the Department of Endocrinology of the Children's Hospital, Capital Institute of Pediatrics from January 2019 to March 2021 were retrospectively analyzed. The general conditions, clinical manifestations, laboratory examinations, genetic charcteistics, treatment and follow-up (up to October 2021) were analyzed. Results: Of the 5 cases, 1 was female and 4 were males, aged from 13 months to 6 years at the time of consultation. The symptoms of hypoglycemia and convulsion were presented in infancy, and 4 cases had infantile cholestasis. Glucose level of 5 cases ranged from 0.79-2.20 mmol/L, ACTH ranged from <1.00-4.17 ng/L, and cortisol ranged from 0.2-3.8 μg/L. Whole exon sequencing revealed that 3 cases carried homozygous TBX19 variations, and 2 cases had compound heterozygous TBX19 variations, including 3 variants that had been reported before and 3 novel variants were found. After the diagnosis was confirmed, all the cases were treated with hydrocortisone. Hypoglycemia was all corrected during the follow-up, and 4 cases no longer had convulsions. Conclusion: Congenital isolated ACTH deficiency should be considered in neonates and infants with cholestasis and hypoglycemia, and the diagnosis can be confirmed by genetic testing.
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Affiliation(s)
- M Du
- Department of Endocrinology, Children's Hospital, Capital Institute of Pediatrics, Beijing 100020, China
| | - Z Q Liu
- Department of Endocrinology, Children's Hospital, Capital Institute of Pediatrics, Beijing 100020, China
| | - F Y Song
- Department of Endocrinology, Children's Hospital, Capital Institute of Pediatrics, Beijing 100020, China
| | - K Qian
- Department of Endocrinology, Children's Hospital, Capital Institute of Pediatrics, Beijing 100020, China
| | - X B Chen
- Department of Endocrinology, Children's Hospital, Capital Institute of Pediatrics, Beijing 100020, China
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Jia B, Wang CG, Chen H, Zhou XB, Qian K, Chen C, Xu LX, Fu JL. The effect of cytoplasmic dynein on the development and functional maintenance of retinal photoreceptor cells. Eur Rev Med Pharmacol Sci 2021; 25:6539-6547. [PMID: 34787856 DOI: 10.26355/eurrev_202111_27096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Cytoplasmic dynein is a multi-subunit complex that includes cytoplasmic dynein-1 (dynein1) and cytoplasmic dynein-2 (dynein2). It participates in various basic cellular processes, including nuclear migration, mitotic spindle organization, chromosome separation during mitosis, and the location and function of numerous intracellular organelles. Retinal photoreceptor cells are terminally differentiated neurons that cannot regenerate and cannot be replaced once lost. It is thus crucial to study their development to facilitate the generation and improvement of photoreceptor disease treatments. The outer segment (OS) of photoreceptor cells is a specific sensory cilium. An increasing number of studies have shown that cytoplasmic dynein plays an essential role in the development of retinal photoreceptor cells. To date, people have done a lot of studies on the various functions of dynein in cells and have a very detailed understanding. However, the role of dynein in retinal photoreceptor cells has not been summarized in detail. This article summarizes the currently available knowledge relating to the effects and mechanisms of cytoplasmic dynein on the development and functional maintenance of retinal photoreceptor cells.
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Affiliation(s)
- B Jia
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun City, China.
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Ding L, Chen X, Qian K, Jiang Z. Probiotics on Intestinal Flora Disturbance and Bacterial Translocation in Mice with Inflammatory Bowel Disease. Indian J Pharm Sci 2021. [DOI: 10.36468/pharmaceutical-sciences.872] [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: 11/22/2022] Open
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Hu ZH, Chen HH, Qian K, Ning CQ, Peng GH, Yu YF, Zhou XF, Chu YH, Xu D, Chen JX, Tian LG, Li H. [Prevalence and risk factors of Blastocystis hominis infections among AIDS patients in Nanchang City]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2020; 32:577-583. [PMID: 33325191 DOI: 10.16250/j.32.1374.2020208] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To investigate the prevalence and risk factors of Blastocystis hominis infections among AIDS patients in Nanchang City. METHODS A cross-sectional questionnaire survey was conducted among AIDS patients in Nanchang City during the period between May and September, 2016. B. hominis infection was detected in patients'stool samples using a PCR assay, and the CD4+ T cell count was measured in subjects'blood samples. In addition, the risk factors of B. hominis infection in AIDS patients were identified using univariate and multivariate logistic regression analyses. RESULTS A survey was conducted in Nanchang City from May to September 2016. A total of 505 AIDS patients were investigated, and the prevalence of B. hominis infection was 4.16%. Univariate analysis revealed that B. hominis infection correlated with the occupation (χ2 = 8.595, P = 0.049), education level (χ2 = 14.494, P = 0.001), type of daily drinking water (χ2 = 10.750, P = 0.020), root of HIV infections (χ2 = 8.755, P = 0.026) and receiving anti-HIV therapy (χ2 = 23.083, P = 0.001) among AIDS patients, and multivariate logistic regression analysis identified daily direct drinking of tap water as a risk factor of B. hominis infections [odds ratio (OR) = 7.988, 95% confidential interval (CI): (1.160, 55.004)] and anti-HIV therapy as a protective factor of B. hominis infection [OR = 0.183, 95% CI: (0.049, 0.685)]. CONCLUSIONS The prevalence of B. hominis is 4.16% among AIDS patients in Nanchang City. Daily direct drinking of tap water is a risk factor, and anti-HIV therapy is a protective factor of B. hominis infection among AIDS patients living in Nanchang City.
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Affiliation(s)
- Z H Hu
- Research Base of the National Key Laboratory of Infectious Disease Prevention and Control, Key Laboratory of Animal Origin and Vector-borne Infectious Diseases of Jiangxi Province, Nanchang Center for Disease Control and Prevention, Jiangxi Province, Nanchang 330038, China
| | - H H Chen
- National Institute of Parasitic Disease, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Disease Research, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Key Laboratory of Parasites and Vector Biology, National Health Commission, China.,▵Co-first author
| | - K Qian
- Research Base of the National Key Laboratory of Infectious Disease Prevention and Control, Key Laboratory of Animal Origin and Vector-borne Infectious Diseases of Jiangxi Province, Nanchang Center for Disease Control and Prevention, Jiangxi Province, Nanchang 330038, China
| | - C Q Ning
- National Institute of Parasitic Disease, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Disease Research, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Key Laboratory of Parasites and Vector Biology, National Health Commission, China
| | - G H Peng
- Research Base of the National Key Laboratory of Infectious Disease Prevention and Control, Key Laboratory of Animal Origin and Vector-borne Infectious Diseases of Jiangxi Province, Nanchang Center for Disease Control and Prevention, Jiangxi Province, Nanchang 330038, China
| | - Y F Yu
- National Institute of Parasitic Disease, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Disease Research, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Key Laboratory of Parasites and Vector Biology, National Health Commission, China
| | - X F Zhou
- Research Base of the National Key Laboratory of Infectious Disease Prevention and Control, Key Laboratory of Animal Origin and Vector-borne Infectious Diseases of Jiangxi Province, Nanchang Center for Disease Control and Prevention, Jiangxi Province, Nanchang 330038, China
| | - Y H Chu
- National Institute of Parasitic Disease, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Disease Research, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Key Laboratory of Parasites and Vector Biology, National Health Commission, China
| | - D Xu
- Research Base of the National Key Laboratory of Infectious Disease Prevention and Control, Key Laboratory of Animal Origin and Vector-borne Infectious Diseases of Jiangxi Province, Nanchang Center for Disease Control and Prevention, Jiangxi Province, Nanchang 330038, China
| | - J X Chen
- National Institute of Parasitic Disease, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Disease Research, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Key Laboratory of Parasites and Vector Biology, National Health Commission, China
| | - L G Tian
- National Institute of Parasitic Disease, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Disease Research, WHO Collaborating Center for Tropical Diseases, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Key Laboratory of Parasites and Vector Biology, National Health Commission, China
| | - H Li
- Nanchang Municipal Health Commission, Jiangxi Province, China
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Nisbet SJ, Targett D, Rawlings AV, Qian K, Wang X, Lin CB, Thompson MA, Bulsara PA, Moore DJ. Clinical and in vitro evaluation of new anti-redness cosmetic products in subjects with winter xerosis and sensitive skin. Int J Cosmet Sci 2020; 41:534-547. [PMID: 31309600 PMCID: PMC6899962 DOI: 10.1111/ics.12559] [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: 07/11/2019] [Accepted: 07/11/2019] [Indexed: 12/20/2022]
Abstract
Objective To demonstrate the in vitro activities of panthenol, palmitoylethanolamide (PEA), and niacinamide (NAM) and determine the biophysical properties, clinical safety, tolerability together with efficacy of two developmental anti‐redness (AR) formulations containing these ingredients, in alleviating facial redness associated with winter xerosis in healthy volunteers with sensitive skin. Methods The anti‐inflammatory and skin protective properties of panthenol, PEA and NAM were evaluated in vitro. The physical properties of the AR formulations were analysed using measurement of water vapour transport rate (WVTR) and infrared spectroscopy. Clinical studies were performed between the months of December and April (2014–2015) with efficacy assessed during the winter. Facial redness, irritation, sensitization potential, photo‐irritation, and photo‐sensitization were evaluated. Self‐assessed adverse reactions were reported in diaries of use. Results Panthenol and PEA reduced prostaglandin E2, interleukin‐6, and thymic stromal lymphopoietin levels in vitro, while NAM induced nicotinamide adenine dinucleotide (NAD) levels and the keratinocyte differentiation markers: filaggrin (2‐fold increase, P < 0.001), loricrin (2‐fold increase, P < 0.05), involucrin (2 fold increase, P < 0.001) & peroxisomal proliferator activated receptor‐alpha (1.5 fold increase, P < 0.05). The two AR products exhibited low WVTR vs. no treatment (P < 0.001) and displayed an ordered lipid structure. The day cream formulation protected against ultraviolet B radiation in vitro. A total of 382 participants were included in clinical studies which showed the AR formulations significantly improved facial redness associated with winter xerosis (Day 29 mean change from baseline: AR day cream 0.77 (P < 0.001); AR serum 0.67 (P < 0.001)). No irritation, sensitization, photo‐irritation, photo‐sensitization or product‐related adverse reactions were observed or reported in the clinical studies. Conclusion The new products significantly improved skin redness associated with winter xerosis in participants with self‐perceived sensitive skin. Both products were well tolerated with a suitable safety profile for topical use in subjects with sensitive skin.
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Affiliation(s)
- S J Nisbet
- Skin Health Research & Development at GlaxoSmithKline Consumer Healthcare, Weybridge, Surrey, UK
| | - D Targett
- Primoris Contract Solutions Ltd., Ascot, Berkshire, UK
| | | | - K Qian
- Thomas J. Stephens & Associates, Richardson, TX, USA
| | - X Wang
- GlaxoSmithKline, Collegeville, PA, USA
| | - C B Lin
- GlaxoSmithKline, Collegeville, PA, USA
| | - M A Thompson
- GlaxoSmithKline Consumer Healthcare, Warren, NJ, USA
| | - P A Bulsara
- GlaxoSmithKline Consumer Healthcare, Warren, NJ, USA
| | - D J Moore
- GlaxoSmithKline Consumer Healthcare, Warren, NJ, USA
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Fasching P, Huang M, Cortés J, Zhao J, O’Shaughnessy J, Hu P, Haiderali A, Karantza V, Aktan G, Briggs A, Ramsey S, Qi C, Xie J, Gu C, Qian K, Yuan M, Wu E. Meta-analysis on association of pathological complete response with long-term survival outcomes in triple-negative breast cancer. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz240.067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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8
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Zhi X, Wang C, Chen J, Yang Y, Liu D, Li H, Li S, Li Y, Qian K, Li X, Lu F, Feng H, Molina R, Pu C. P2.11-42 A Prospective Multicenter Study to Assess Combined 6 Tumor Markers for Early Stage Lung Cancer in Patients with Lung Nodule. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Su H, Hurd Price CA, Jing L, Tian Q, Liu J, Qian K. Janus particles: design, preparation, and biomedical applications. Mater Today Bio 2019; 4:100033. [PMID: 32159157 PMCID: PMC7061647 DOI: 10.1016/j.mtbio.2019.100033] [Citation(s) in RCA: 114] [Impact Index Per Article: 22.8] [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: 07/18/2019] [Revised: 09/30/2019] [Accepted: 10/11/2019] [Indexed: 02/07/2023] Open
Abstract
Janus particles with an anisotropic structure have emerged as a focus of intensive research due to their diverse composition and surface chemistry, which show excellent performance in various fields, especially in biomedical applications. In this review, we briefly introduce the structures, composition, and properties of Janus particles, followed by a summary of their biomedical applications. Then we review several design strategies including morphology, particle size, composition, and surface modification, that will affect the performance of Janus particles. Subsequently, we explore the synthetic methodologies of Janus particles, with an emphasis on the most prevalent synthetic method (surface nucleation and seeded growth). Following this, we highlight Janus particles in biomedical applications, especially in drug delivery, bio-imaging, and bio-sensing. Finally, we will consider the current challenges the materials face with perspectives in the future directions.
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Affiliation(s)
- H. Su
- School of Biomedical Engineering, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, China
| | - C.-A. Hurd Price
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- DICP-Surrey Joint Centre for Future Materials, Department of Chemical and Process Engineering, University of Surrey Guildford, Surrey, GU2 7XH, United Kingdom
| | - L. Jing
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Q. Tian
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - J. Liu
- State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
- DICP-Surrey Joint Centre for Future Materials, Department of Chemical and Process Engineering, University of Surrey Guildford, Surrey, GU2 7XH, United Kingdom
| | - K. Qian
- School of Biomedical Engineering, Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, China
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Zuo J, Qian K, He Y, Xuan Y, Tan I, Butlin M, Chen P, Avolio A. VITAMIN D DEFICIENCY IS ASSOCIATED WITH ANKLE-BRACHIAL INDEX BUT NOT ARTERIAL STIFFNESS IN AN ELDERLY COMMUNITY-DWELLING CHINESE POPULATION. J Hypertens 2019. [DOI: 10.1097/01.hjh.0000571876.43088.e9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Yuan X, Fan YS, Xu L, Xie GQ, Feng XH, Qian K. Jia-Wei-Si-Miao-Wan alleviates acute gouty arthritis by targeting NLRP3 inflammasome. J BIOL REG HOMEOS AG 2019; 33:63-71. [PMID: 30697988] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Gout is a common metabolic disease and acute gouty arthritis (AGA) is one of the important complications. Jia-Wei-Si-Miao-Wan is a newly developed drug for treating acute gouty arthritis, but the molecular mechanism has not been completely clarified. Thus, this study was aimed to explore the regulation of Jia-Wei-Si-Miao-Wan on NLRP3 inflammasome and TLR/NF-κB signaling, which are two important signaling pathways in inflammation. AGA rat model was established by injecting monosodium urate into the right knee. Colchicine and Jia-Wei-Si-Miao-Wan were administrated by gavage. The circumference of the knee was measured. IL-1β and IL-18 level in the flushing fluid was detected by enzyme linked immunosorbent assay (ELISA). Western blot, immunohistochemistry and quantitative real-time RT-PCR were used to detect the protein and mRNA expression of TLR4, NLRP3, ASC, caspase-1, NF-κB and p-NF-κB. The results showed that IL-1β and IL-18 level in the flushing fluid was increased and TLR4, NLRP3, ASC, caspase-1, NF-κB and p-NF-κB expressions were up-regulated after the establishment of AGA rat model. Colchicine and Jia-Wei-Si-Miao-Wan administration could alleviate the inflammation in the knee by inhibiting NLRP3 inflammasome and TLR/NF-κB signaling. In vivo data showed that the therapeutic effect of Jia-Wei-Si-Miao-Wan could be comparable with colchicine but had lower hepatic and renal toxicity. In conclusion, Targeting NLRP3 inflammasome and TLR/NF-κB signaling by Jia-Wei-Si-Miao-Wan could be effective in treating AGA.
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Affiliation(s)
- X Yuan
- Department of Endocrinology, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
| | - Y S Fan
- College of Basic Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - L Xu
- College of Basic Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - G Q Xie
- College of Basic Medicine, Zhejiang Chinese Medical University, Hangzhou, China
| | - X H Feng
- Department of Endocrinology, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
| | - K Qian
- Department of Traditional Chinese Medicine, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Hangzhou, China
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Huang L, Chen R, Qian K. Plasmonic nanoshells based metabolite detection for in vitro metabolic diagnostics and therapeutic evaluation. N Biotechnol 2018. [DOI: 10.1016/j.nbt.2018.05.1174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Song J, Qian K. Endometrial, but not ovarian response affects clinical outcomes and can be improved by prolonged pituitary down-regulation in patients with thin and medium endometrium. Fertil Steril 2018. [DOI: 10.1016/j.fertnstert.2018.07.729] [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: 12/01/2022]
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Lin X, Lu JC, Shao Y, Zhang YY, Wu X, Pan JB, Gao L, Zhu SY, Qian K, Zhang YF, Bao DL, Li LF, Wang YQ, Liu ZL, Sun JT, Lei T, Liu C, Wang JO, Ibrahim K, Leonard DN, Zhou W, Guo HM, Wang YL, Du SX, Pantelides ST, Gao HJ. Intrinsically patterned two-dimensional materials for selective adsorption of molecules and nanoclusters. Nat Mater 2017; 16:717-721. [PMID: 28604716 DOI: 10.1038/nmat4915] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 05/03/2017] [Indexed: 06/07/2023]
Abstract
Two-dimensional (2D) materials have been studied extensively as monolayers, vertical or lateral heterostructures. To achieve functionalization, monolayers are often patterned using soft lithography and selectively decorated with molecules. Here we demonstrate the growth of a family of 2D materials that are intrinsically patterned. We demonstrate that a monolayer of PtSe2 can be grown on a Pt substrate in the form of a triangular pattern of alternating 1T and 1H phases. Moreover, we show that, in a monolayer of CuSe grown on a Cu substrate, strain relaxation leads to periodic patterns of triangular nanopores with uniform size. Adsorption of different species at preferred pattern sites is also achieved, demonstrating that these materials can serve as templates for selective self-assembly of molecules or nanoclusters, as well as for the functionalization of the same substrate with two different species.
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Affiliation(s)
- X Lin
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - J C Lu
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - Y Shao
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - Y Y Zhang
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
- Department of Physics and Astronomy and Department of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, Tennessee 37235, USA
| | - X Wu
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - J B Pan
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - L Gao
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - S Y Zhu
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - K Qian
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - Y F Zhang
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - D L Bao
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - L F Li
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - Y Q Wang
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - Z L Liu
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - J T Sun
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - T Lei
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - C Liu
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - J O Wang
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - K Ibrahim
- Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - D N Leonard
- Material Sciences and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37381, USA
| | - W Zhou
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
- Material Sciences and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37381, USA
| | - H M Guo
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - Y L Wang
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - S X Du
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
| | - S T Pantelides
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
- Department of Physics and Astronomy and Department of Electrical Engineering and Computer Science, Vanderbilt University, Nashville, Tennessee 37235, USA
| | - H-J Gao
- Institute of Physics & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing 100190, China
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Sun XJ, Jiang L, Ji LC, Nie R, Chen H, Jin L, Zhu GJ, Qian K. A retrospective analysis of ovarian stimulation with letrozole in women undergoing artificial insemination by donor. Reprod Biomed Online 2017; 34:354-360. [PMID: 28187961 DOI: 10.1016/j.rbmo.2017.01.008] [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: 06/27/2016] [Revised: 01/07/2017] [Accepted: 01/11/2017] [Indexed: 10/20/2022]
Abstract
The aim of this retrospective study was to determine the clinical pregnancy rate in women undergoing letrozole ovarian stimulation and artificial insemination by donor (AID). Between 2012 and 2015, 130 natural cycles, 939 letrozole cycles and 130 letrozole plus gonadotrophin cycles were conducted. Letrozole cycles were divided into three groups according to LH concentration on the day of HCG administration (LH <10 mIU/ml and follicle size ≥18 cm; LH ≤10 to <20 mIU/ml; and LH ≥20 mIU/ml). Pregnancy rates were 17.3%, 22.4% and 26.8%, respectively (P = 0.012). In women given 10 mIU/ml LH or more, logistic regression identified oestradiol (OR 1.002, 95% CI, 1.000 to 1.004, P = 0.029) and leading follicle size (OR 0.861, 95% CI, 0.772 to 0.960, P = 0.007) as significant predictive factors of pregnancy rate; the higher the oestradiol and the smaller the follicles, the better the pregnancy rate. The pregnancy rate was significantly higher in the letrozole plus gonadotrophin group than the letrozole group (P = 0.04). Better pregnancy rates can be achieved if LH surge occurs before HCG administration, especially with higher oestradiol and lower follicle size; treatment with letrozole plus gonadotrophin was significantly more effective than letrozole alone in AID.
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Affiliation(s)
- X J Sun
- Reproductive Medicine Center, Tongji Hospital, Tongji Medicine College, Huazhong University of Science and Technology, Wuhan, China
| | - L Jiang
- Reproductive Medicine Center, Tongji Hospital, Tongji Medicine College, Huazhong University of Science and Technology, Wuhan, China
| | - L C Ji
- Reproductive Medicine Center, Tongji Hospital, Tongji Medicine College, Huazhong University of Science and Technology, Wuhan, China
| | - R Nie
- Reproductive Medicine Center, Tongji Hospital, Tongji Medicine College, Huazhong University of Science and Technology, Wuhan, China
| | - H Chen
- Department of Rehabilitation Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - L Jin
- Reproductive Medicine Center, Tongji Hospital, Tongji Medicine College, Huazhong University of Science and Technology, Wuhan, China.
| | - G J Zhu
- Reproductive Medicine Center, Tongji Hospital, Tongji Medicine College, Huazhong University of Science and Technology, Wuhan, China.
| | - K Qian
- Reproductive Medicine Center, Tongji Hospital, Tongji Medicine College, Huazhong University of Science and Technology, Wuhan, China.
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Schoelermann AM, Weber TM, Arrowitz C, Rizer RL, Qian K, Babcock M. Skin compatibility and efficacy of a cosmetic skin care regimen with licochalcone A and 4-t-butylcyclohexanol in patients with rosacea subtype I. J Eur Acad Dermatol Venereol 2016; 30 Suppl 1:21-7. [PMID: 26805419 DOI: 10.1111/jdv.13531] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/27/2015] [Indexed: 11/27/2022]
Abstract
BACKGROUND Patients with rosacea often show facial sensitivity to cosmetics or skin care products that can influence the severity of symptoms and exacerbate erythema and inflammation. Nevertheless, special skin care is necessary to address cosmetic concerns and reduce the potential side-effects of topical or oral treatment of the disease. Appropriate skin care should comprise gentle cleansing, effective moisturization, soothing actives, UV protection and concealing pigments to help neutralize the appearance of redness. OBJECTIVE To determine the compatibility and efficacy of a skin care regimen (consisting of a cleanser, a day care with SPF25 and a night care) containing licochalcone A (Lic A), an anti-irritant from the licorice plant Glycyrrhiza inflata, and 4-t-butylcyclohexanol (SymSitive(®) ), a substance which acts as a sensitivity regulator, in female subjects with clinically determined subtype I rosacea. METHODS Thirty-two test subjects with mild to moderate rosacea used the skin care regimen daily for 8 weeks. Clinical assessment of erythema, subjective irritation and clinical photography were performed at baseline and after 4 and 8 weeks. Additionally, a quality-of-life questionnaire was filled out by the test subjects at baseline and week 8. The subjects completed a self-assessment questionnaire on product properties after 4 and 8 weeks of product use. RESULTS Clinical assessments and subject response confirmed very good tolerability of the regimen, a statistically significant improvement in clinical grading for erythema and tactile roughness at weeks 4 and 8 and on telangiectasia at week 8 when compared to baseline scores. A statistically significant improvement in facial redness (a*) values, based on the L*a*b* colorimetric system, was determined at week 4 and 8 in comparison to baseline. No difference in corneometric measurement was detected at week 4 and 8 compared to baseline. CONCLUSION The skin care regimen was found to be highly compatible with the sensitive facial skin of patients with rosacea subtype I and effective in improving signs of rosacea. Therefore, the daily use of skin care products containing LicA and SymSitive(®) in patients with rosacea improves the overall skin appearance and the quality of life of these patients.
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Affiliation(s)
| | | | | | - R L Rizer
- TJ Stephens & Associates, Colorado Springs, CO, USA
| | - K Qian
- TJ Stephens & Associates, Colorado Springs, CO, USA
| | - M Babcock
- TJ Stephens & Associates, Colorado Springs, CO, USA
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Wang L, Huang L, Zhang H, Qian K. CDKN1C (p57): the determinant of human endometrial stromal cell decidualization. Fertil Steril 2016. [DOI: 10.1016/j.fertnstert.2016.07.620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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18
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Li XJ, Zhou J, Liu LQ, Qian K, Wang CL. Identification of genes in longissimus dorsi muscle differentially expressed between Wannanhua and Yorkshire pigs using RNA-sequencing. Anim Genet 2016; 47:324-33. [DOI: 10.1111/age.12421] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/10/2015] [Indexed: 12/14/2022]
Affiliation(s)
- X.-J. Li
- Anhui Academy of Agricultural Sciences; Institute of Animal Husbandry and Veterinary Medicine; Hefei 230031 China
- College of Animal Science and Technology; Anhui Agricultural University; Hefei 230036 China
| | - J. Zhou
- College of Animal Science and Technology; Anhui Agricultural University; Hefei 230036 China
| | - L.-Q. Liu
- Anhui Academy of Agricultural Sciences; Institute of Animal Husbandry and Veterinary Medicine; Hefei 230031 China
| | - K. Qian
- Anhui Academy of Agricultural Sciences; Institute of Animal Husbandry and Veterinary Medicine; Hefei 230031 China
| | - C.-L. Wang
- Anhui Academy of Agricultural Sciences; Institute of Animal Husbandry and Veterinary Medicine; Hefei 230031 China
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Huang C, Long Q, Qian K, Fu T, Zhang Z, Liao P, Xie J. Resistance and integron characterization of Acinetobacter baumannii in a teaching hospital in Chongqing, China. New Microbes New Infect 2015; 8:103-8. [PMID: 26649184 PMCID: PMC4644259 DOI: 10.1016/j.nmni.2015.09.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2015] [Revised: 09/23/2015] [Accepted: 09/24/2015] [Indexed: 10/25/2022] Open
Abstract
A total of 189 Acinetobacter baumannii isolates were collected in 2011 from a teaching hospital in Chongqing, China. Susceptibility data showed strains carrying integrons were significantly more resistant to all tested antibiotics that strains lacking integrons. Five types of gene cassettes belonging to class I integrons were identified in this study, and for the first time two types of gene cassettes belonging to class II integrons are reported. Most of the cassettes belong to a class I integron (136/144) encoding arr3, aacA4, dfrA17, aadA5, aadB, cat, blaOXA10 , aadA1, aadA2, dfrA and aacC1. Isolates contained a class I gene cassette; AadA2-HP-dfrA was the prevalent strain in this hospital. A class II integron was detected in eight strains, which contained the type IV fimbriae expression regulatory gene pilR and sulfate adenylyltransferase, suggesting a possible role in multidrug resistance. The major epidemic strains from intensive care unit patients belong to international clone 2. In conclusion, the presence of integrons was significantly associated with multiple drug resistance of A. baumannii in this hospital, and class I integron isolates bearing AadA2-HP-dfrA were the prevalent strain in this hospital.
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Affiliation(s)
- C Huang
- Institute of Modern Biopharmaceuticals, State Key Laboratory Breeding Base of Eco-Environment and Bio-Resource of the Three Gorges Area, Key Laboratory of Eco-Environments in Three Gorges Reservoir Region, Ministry of Education, School of Life Sciences, Southwest University, Beibei, China ; The Fifth People's Hospital of Chongqing, Nanan, China
| | - Q Long
- The Key Laboratory of Molecular Biology of Infectious Diseases of the Chinese Ministry of Education, Chongqing Medical University, Yuzhong, Chongqing, China ; Chongqing Center for Clinical Laboratory, The Third People's Hospital of Chongqing, Yuzhong, Chongqing, China
| | - K Qian
- The Fifth People's Hospital of Chongqing, Nanan, China
| | - T Fu
- Institute of Modern Biopharmaceuticals, State Key Laboratory Breeding Base of Eco-Environment and Bio-Resource of the Three Gorges Area, Key Laboratory of Eco-Environments in Three Gorges Reservoir Region, Ministry of Education, School of Life Sciences, Southwest University, Beibei, China
| | - Z Zhang
- Institute of Modern Biopharmaceuticals, State Key Laboratory Breeding Base of Eco-Environment and Bio-Resource of the Three Gorges Area, Key Laboratory of Eco-Environments in Three Gorges Reservoir Region, Ministry of Education, School of Life Sciences, Southwest University, Beibei, China ; Chongqing Center for Clinical Laboratory, The Third People's Hospital of Chongqing, Yuzhong, Chongqing, China
| | - P Liao
- Chongqing Center for Clinical Laboratory, The Third People's Hospital of Chongqing, Yuzhong, Chongqing, China
| | - J Xie
- Institute of Modern Biopharmaceuticals, State Key Laboratory Breeding Base of Eco-Environment and Bio-Resource of the Three Gorges Area, Key Laboratory of Eco-Environments in Three Gorges Reservoir Region, Ministry of Education, School of Life Sciences, Southwest University, Beibei, China
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Cui J, Yang Y, Li H, Leng Y, Qian K, Huang Q, Zhang C, Lu Z, Chen J, Sun T, Wu R, Sun Y, Song H, Wei X, Jing P, Yang X, Zhang C. MiR-873 regulates ERα transcriptional activity and tamoxifen resistance via targeting CDK3 in breast cancer cells. Oncogene 2014; 34:3895-907. [PMID: 25531331 DOI: 10.1038/onc.2014.430] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2014] [Revised: 11/19/2014] [Accepted: 11/21/2014] [Indexed: 12/21/2022]
Abstract
miRNAs (microRNAs) are frequently and aberrantly expressed in many cancers. MiR-873 has been revealed to be downregulated in colorectal cancer and glioblastoma. However, its function remains unclear. Here we report that miR-873 is downregulated in breast tumor compared with normal tissue. Enforced expression of miR-873 decreases the transcriptional activity of ER (estrogen receptor)-α but not ERβ through the modulation of ERα phosphorylation in ER-positive breast cancer cells. We also found that miR-873 inhibits breast cancer cell proliferation and tumor growth in nude mice. Reporter gene assays revealed cyclin-dependent kinase 3 (CDK3) as a direct target of miR-873. CDK3 was shown to be overexpressed in breast cancer and phosphorylate ERα at Ser104/116 and Ser118. Furthermore, we found that Mir-873 inhibits ER activity and cell growth via targeting CDK3. Interestingly, miR-873 was observed to be downregulated in tamoxifen-resistant MCF-7/TamR cells, while CDK3 is overexpressed in these cells. More importantly, re-expression of miR-873 reversed tamoxifen resistance in MCF-7/TamR cells. Our data demonstrate that miR-873 is a novel tumor suppressor in ER-positive breast cancer and a potential therapeutic approach for treatment of tamoxifen-resistant breast cancer.
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Affiliation(s)
- J Cui
- Institute of Disease Control and Prevention, Chinese Academy of Military Medical Sciences, Beijing, China
| | - Y Yang
- Beijing Institute for Neuroscience, Capital Medical University, Beijing, China
| | - H Li
- Department of Molecular & Biomedical Pharmacology, University of Kentucky College of Medicine, Lexington, KY, USA
| | - Y Leng
- The Affiliated Hospital of Jiujiang University, Jiujiang, China
| | - K Qian
- The Affiliated Hospital of Jiujiang University, Jiujiang, China
| | - Q Huang
- Department of Animal Sciences and Technology, Jilin Agriculture University, Changchun, China
| | - C Zhang
- Division of Experimental Hematology and Cancer Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Z Lu
- Institute of Disease Control and Prevention, Chinese Academy of Military Medical Sciences, Beijing, China
| | - J Chen
- Urology Department, the First Hospital of Nanchang University, Nanchang, China
| | - T Sun
- Urology Department, the First Hospital of Nanchang University, Nanchang, China
| | - R Wu
- Institute of Disease Control and Prevention, Chinese Academy of Military Medical Sciences, Beijing, China
| | - Y Sun
- Institute of Disease Control and Prevention, Chinese Academy of Military Medical Sciences, Beijing, China
| | - H Song
- Institute of Disease Control and Prevention, Chinese Academy of Military Medical Sciences, Beijing, China
| | - X Wei
- Department of Applied Chemistry, College of Chemistry & Molecular Engineering, Peking University, Beijing, China
| | - P Jing
- Department of Chemistry, College of Arts and Sciences, Indiana University-Purdue University Fort Wayne Fort Wayne, IN, USA
| | - X Yang
- Institute of Health Sciences, Anhui University, Hefei, China
| | - C Zhang
- Institute of Disease Control and Prevention, Chinese Academy of Military Medical Sciences, Beijing, China
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Abstract
Goose parvovirus (GPV) causes high mortality and morbidity in goslings and Muscovy ducklings. In this study, a GPV was isolated from a 20-day old swan in Shanghai, China. Complete genome of the swan isolate contained 5,050 nt and showed the highest homology with Taiwanese GPV isolates from 1982. In comparison with the Chinese mainland GPV isolates reported previously, the swan isolate shows two deletions, particularly at positions 67-80 and 334-347 in inverted terminal repeats (ITRs). These findings suggest that the swan could serve as a potential host for GPV and provide insights into molecular characteristics and etiology of GPV.
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Chen X, Hu X, Yu C, Qian K, Ye J, Qin A. Differential protein analysis of chicken skin infected with Marek΄s disease virus. Acta Virol 2014; 58:43-52. [PMID: 24717028 DOI: 10.4149/av_2014_01_43] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The skin and feather follicle epithelia of birds infected with Marek's disease virus (MDV) are the sites of infectious virus particle formation and shedding. However, the host responses and protein networks involved in the production of virus particles in the skin of MDV-infected chickens are poorly understood. This current study aimed to analyze the differential protein expression patterns in skin between MDV-infected and uninfected specific pathogen-free (SPF) chickens 28 days post infection (dpi) by combining two-dimensional electrophoresis (2-DE) and mass spectrometry (MS) analyses. Through 2-DE analysis, our results revealed 23 proteins whose expression changed significantly following infection, of which 16 proteins were confirmed by MS. The identified proteins were functionally classified into 5 groups: immune-related, cell regulatory, cytoskeletal, metabolism-related and transport proteins. A single protein, beta 2-microglobulin, was further confirmed by real-time quantitative PCR. Beta 2-microglobulin expression was significantly increased in the infected group 28 dpi. This indicates that beta 2-microglobulin might play very important roles in the viral evasion from host immune response.
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23
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Shen X, Wang YX, Hu CW, Qian K, Ji Z, Jin M. One-Pot Conversion of Inulin to Furan Derivatives Catalyzed by Sulfated TiO2/Mordenite Solid Acid. ChemCatChem 2012. [DOI: 10.1002/cctc.201200190] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Reesink HW, Lee J, Keller A, Dennington P, Pink J, Holdsworth R, Schennach H, Goldman M, Petraszko T, Sun J, Meng Y, Qian K, Rehacek V, Turek P, Krusius T, Juvonen E, Tiberghien P, Legrand D, Semana G, Muller JY, Bux J, Reil A, Lin CK, Daly H, McSweeney E, Porretti L, Greppi N, Rebulla P, Okazaki H, Sánchez-Guerrero SA, Baptista-González HA, Martínez-Murillo C, Guerra-Márquez A, Rodriguez-Moyado H, Middelburg RA, Wiersum-Osselton JC, Brand A, van Tilburg C, Dinesh D, Dagger J, Dunn P, Brojer E, Letowska M, Maslanka K, Lachert E, Uhrynowska M, Zhiburt E, Palfi M, Berlin G, Frey BM, Puig Rovira L, Muñiz-Diaz E, Castro E, Chapman C, Green A, Massey E, Win N, Williamson L, Silliman CC, Chaffin DJ, Ambruso DR, Blumberg N, Tomasulo P, Land KJ, Norris PJ, Illoh OC, Davey RJ, Benjamin RJ, Eder AF, McLaughlin L, Kleinman S, Panzer S. Measures to prevent transfusion-related acute lung injury (TRALI). Vox Sang 2012; 103:231-59. [DOI: 10.1111/j.1423-0410.2012.01596.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [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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25
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Cheng H, Zhang YC, Wolfe S, Valencia V, Qian K, Shen L, Tang YL, Hsu WH, Atkinson MA, Phillips MI. Combinatorial treatment of bone marrow stem cells and stromal cell-derived factor 1 improves glycemia and insulin production in diabetic mice. Mol Cell Endocrinol 2011; 345:88-96. [PMID: 21801807 PMCID: PMC3171644 DOI: 10.1016/j.mce.2011.07.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/11/2011] [Revised: 07/06/2011] [Accepted: 07/12/2011] [Indexed: 01/16/2023]
Abstract
Transdifferentiation of stem cells into insulin-producing cells for the treatment of diabetes have shown promising but inconsistent results. We examined the potential for attracting bone marrow stem cells (BMSCs) to the pancreas using a chemokine, stromal cell-derived factor 1 (SDF-1). SDF-1 treatment markedly increased the number of GFP labeled BMSCs in the pancreas, but surprisingly, the majority was observed in liver. The liver cells had typical pancreatic endocrine cell gene expression including insulin I, insulin II, PDX-1, somatostatin, and glucagon. Combined treatment with SDF-1 and BMSC transplant reduced hyperglycemia and prolonged the long-term survival of diabetic mice, and a sub group had complete normoglycemia (<150 mg/dl), restored blood insulin levels, and normal glucose tolerance. Our results suggest that SDF-1 could potentially be used to improve the homing of stem cells and β-cell regeneration. The mechanism appears to involve an increase in insulin producing cells mainly in the liver.
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Affiliation(s)
- H Cheng
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, 70803, USA.
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Evans-Lutterodt K, Qian K, Jakoncic J, Stojanoff V. The use of kinoform lenses as an option for microbeams in macromolecular crystallography. Acta Crystallogr A 2011. [DOI: 10.1107/s0108767311087824] [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: 11/10/2022] Open
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27
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Qian K, Zhan L, Zhang L, Zhu ZQ, Peng JS, Gu ZC, Hu X, Luo SY, Xia YX. Group velocity manipulation in active fibers using mutually modulated cross-gain modulation: from ultraslow to superluminal propagation. Opt Lett 2011; 36:2185-2187. [PMID: 21685961 DOI: 10.1364/ol.36.002185] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We propose and experimentally demonstrate the propagation of slow/fast light in an erbium-doped fiber (EDF) using mutually modulated cross-gain modulation. The group velocity of the light signal can be manipulated by the effect of gain cross-saturation modulation by a saturating light at an arbitrary wavelength in the gain bandwidth of the EDF. The ultraslow propagation with a small group velocity of 5.6 × 10⁻³c (c is the light speed in free space) and superluminal propagation with a negative group velocity of -1.1 × 10⁻³c has been observed under different modulation phases.
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Affiliation(s)
- K Qian
- Department of Physics, Key Laboratory for Laser Plasmas (Ministry of Education), State Key Lab of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai 200240, China
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Devine DV, Reesink HW, Panzer S, Irving DO, Körmöczi GF, Mayr WR, Blais Y, Zhu Y, Qian K, Zhu Z, Greinacher A, Grazzini G, Pupella S, Catalano L, Vaglio S, Liumbruno GM, Smeenk JW, Josemans EAJ, Briët E, Letowska M, Lachert E, Antoniewicz-Papis J, Brojer E, Gulliksson H, Scott M, Williamson L, Prowse C, AuBuchon JP, López JA, Hoffman P, Busch MP, Norris PJ, Tomasulo P, Dodd RY. Research and development. Vox Sang 2010; 99:382-401. [DOI: 10.1111/j.1423-0410.2010.01379.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Greco D, Qian K, Di Lieto A, Corander J, Auvinen P. Gene expression meta-analysis of bipolar disorder and schizophrenia. N Biotechnol 2010. [DOI: 10.1016/j.nbt.2010.01.183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Qian K, Wei XQ, Zeng XP, Liu T, Gao XW. Stage-dependent tolerance of the German cockroach, Blattella germanica for dichlorvos and propoxur. J Insect Sci 2010; 10:201. [PMID: 21268698 PMCID: PMC3029310 DOI: 10.1673/031.010.20101] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/23/2008] [Accepted: 10/07/2010] [Indexed: 05/30/2023]
Abstract
tage-dependent dichlorvos and propoxur tolerance in a field population of the German cockroach, Blattella germanica Linnaeus (Blatodea: Blattellidae), was investigated in the laboratory using a topical application bioassay. The results showed the 6 week-old nymphs were more tolerant to dichlorvos and propoxur than the other ages tested. LD₅₀ values of dichlorvos and propoxur for the 6 week-old nymphs were 2.003 µg per insect and 5.296 µg per insect, respectively. Tolerance ratios of 18.55-fold and 4.98-fold for LD₅₀ were obtained from 6-week-old nymphs compared to 4 week-old nymphs. The specific activity of acetylcholinesterase (AChE) from 1 week-old nymphs was the highest among all tested developmental stages of nymphs and adult males and females. The specific activity of AChE decreased significantly with increasing age. The sensitivity of AChE to dichlorvos was the highest with a k(i) value of 3.12 × 10⁴ mol⁻¹min⁻¹ in the last nymphal stage of B. germanica (about 6 weeks-old). The AChE from 4 week-old nymphs was the most sensitive to propoxur, with the highest k(i) value being 2.63 × 10⁵ mol⁻¹ min⁻¹. These results indicated that the different developmental stages and sexes of B. germanica affected the inhibition of AChE by dichlorvos and propoxur.
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Affiliation(s)
- K. Qian
- Department of Entomology, China Agricultural University, Beijing, 100193, China
| | - XQ. Wei
- Department of Entomology, China Agricultural University, Beijing, 100193, China
| | - XP. Zeng
- Beijing Center for Disease Prevention and Control, Beijing, 100013,China
| | - T. Liu
- Beijing Center for Disease Prevention and Control, Beijing, 100013,China
| | - XW. Gao
- Department of Entomology, China Agricultural University, Beijing, 100193, China
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Abstract
Catnip (Nepeta cataria) is known for its pseudo-narcotic effects on cats. Recently, it has been reported as an effective mosquito repellent against several Aedes and Culex species, both topically and spatially. Our laboratory bioassays showed that catnip essential oil (at a dosage of 20 mg) resulted in average repellency rates of 96% against stable flies, Stomoxys calcitrans (L.) and 79% against houseflies, Musca domestica (L.), respectively. This finding suggested that the application of repellent could be used as part of filth fly management. Further evaluations of catnip oil toxicity were conducted to provide a broad-spectrum safety profile of catnip oil use as a potential biting and nuisance insect repellent in urban settings. Acute oral, dermal, inhalation, primary dermal and eye irritation toxicity tests were performed. The acute oral LD(50) of catnip oil was found to be 3160 mg/kg body weight (BW) and 2710 mg/kg BW in female and male rats, respectively. The acute dermal LD50 was > 5000 mg/kg BW. The acute inhalation LD50 was observed to be > 10,000 mg/m3. Primary skin irritation tested on New Zealand white rabbits showed that catnip oil is a moderate irritant. Catnip oil was classified as practically non-irritating to the eye. In comparison with other U.S. Environmental Protection Agency-approved mosquito repellents (DEET, picaridin and p-menthane-3,8-diol), catnip oil can be considered as a relatively safe repellent, which may cause minor skin irritation.
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Affiliation(s)
- J J Zhu
- Agroecosystem Management Research Unit, U.S. Department of Agriculture, Agricultural Research Service, University of Nebraska, East Campus, Lincoln, Nebraska 68583, USA.
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Qian K, Wang Y, Shi H, Yajun Wang G, Ye H, Min H, Lu X, Ning Y. The primary clinical trial of dendritic cell vaccine pulsed with apoptosis tumor cell in patients with malignant cancers. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.13509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
13509 Background: We evaluated the feasibility, safety, and immunogenicity of mature, apoptosis tumor cells-pulsed dendritic cell (DC) vaccines administered by intradermal injection. Methods: We performed a randomized study in 16 patients with malignant tumors, including 4 cases for gastric cancer, 3 cases for prostate cancer, 2 cases for breast cancers, one case for lung cancer, esophageal carcinoma, liver cancer , colorectal cancer, kidney cancer, ovarian cancer, endometrial cancer respectively.The vaccine used mature DCs (CD11c++, HLA-DR++, CD83+, and CD86+++) generated from peripheral blood monocytes in the presence of GM-CSF and IL-4. After 5 days, DCs were matured with a defined cocktail of cytokines (IL-1+ TNF-a+PGE2) and simultaneously pulsed with apoptosis autologous tumor cells or heterologous tumor cell lines, for 2 days.Patients were administrated four DC vaccinations (5×106 per time) at 7th day, 14th day, 21st day and 42nd day by intradermal injection(ID). Toxicity effect, life quality, immune function and clinical efficacy were monitored during the whole therapy. Results: Fourteen (82.4%) of 17 patients completed all four vaccinations. Vaccinations were well tolerated; a few patients exhibited less than grade 1 toxicities including rash, transient fever, transient debilitation and injection site reaction. The life quality of most patients had improved to certain degree, including sleep, appetite, mental status, and a good recovery from surgery and chemotherapy. Moreover, the serum level of IL-2 of 10/14 patients increased more than several times to twenty times, and 6/10 patients had a long increase for more than forty days. Serum level of IL-12 were increase in 11/14(9/11 patients increased for more than forty days) patients, Serum level of IFN-? were increase in 11/14(5/11 patients increased for more than forty days ) patients. Conclusions: Administration of this apoptosis tumor cell-pulsed mature DC vaccine by ID routes is feasible and safe. This administration seems to result in superior immunological sensitization as measured by in vitro serum level of immune cell factor such as IL-2, IL-12 and IFN-?. No significant financial relationships to disclose.
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Affiliation(s)
- K. Qian
- Changzhou No 2 Hospital, Jiangsu, China; Nanjing Medical Univercity, Najing, China; Yajun Wang, Heng Ye,Haiyan Min,Xiao Lu, Yongling Ning
| | - Y. Wang
- Changzhou No 2 Hospital, Jiangsu, China; Nanjing Medical Univercity, Najing, China; Yajun Wang, Heng Ye,Haiyan Min,Xiao Lu, Yongling Ning
| | - H. Shi
- Changzhou No 2 Hospital, Jiangsu, China; Nanjing Medical Univercity, Najing, China; Yajun Wang, Heng Ye,Haiyan Min,Xiao Lu, Yongling Ning
| | - G. Yajun Wang
- Changzhou No 2 Hospital, Jiangsu, China; Nanjing Medical Univercity, Najing, China; Yajun Wang, Heng Ye,Haiyan Min,Xiao Lu, Yongling Ning
| | - Heng Ye
- Changzhou No 2 Hospital, Jiangsu, China; Nanjing Medical Univercity, Najing, China; Yajun Wang, Heng Ye,Haiyan Min,Xiao Lu, Yongling Ning
| | - Haiyan Min
- Changzhou No 2 Hospital, Jiangsu, China; Nanjing Medical Univercity, Najing, China; Yajun Wang, Heng Ye,Haiyan Min,Xiao Lu, Yongling Ning
| | - Xiao Lu
- Changzhou No 2 Hospital, Jiangsu, China; Nanjing Medical Univercity, Najing, China; Yajun Wang, Heng Ye,Haiyan Min,Xiao Lu, Yongling Ning
| | - Yongling Ning
- Changzhou No 2 Hospital, Jiangsu, China; Nanjing Medical Univercity, Najing, China; Yajun Wang, Heng Ye,Haiyan Min,Xiao Lu, Yongling Ning
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Gao B, Sun HC, Fang HX, Qian K, Zhao MS, Qiu HL, Song CY, Wang ZY. Expression and preliminary characterization of recombinant human tissue kallikrein in egg white of laying hens. Poult Sci 2006; 85:1239-44. [PMID: 16830865 DOI: 10.1093/ps/85.7.1239] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Human tissue kallikrein (hK1) plays an important role in regulation of blood pressure, electrolyte and glucose transport, and renal function. To evaluate the feasibility of expression of recombinant human tissue kallikrein (rhK1) in the egg whites of laying hens, human tissue kallikrein gene (hKLK1) cDNA was subcloned into the chicken oviduct-specific expression vector (pOV3), and the resultant recombinant vector pOV3K was injected into laying hens via wing vein after mixing with polyethyleneimine. Following injection twice with the recombinant vector, the enzymatic activity at a maximal level of 59 U/mL was detected in the egg whites, which lasted for more than 7 d. The expression level of rhK1 in the egg whites in the 3-mg group was relatively higher than that in the 2-mg group, but the significant differences were identified on d 7 and 8 (P < 0.05). Ten days after the primary injection, the hens were reinjected with the same dose of the vector, and even higher enzymatic activity was detected in their egg whites. Two different breeds of hen were tested with no difference in expression level found (P > 0.05). Western blot analysis of the egg whites from vector-injected hens showed the rhK1 was recognized by a polyclonal antibody specific for hK1 with molecular weights of 37 and 43 kDa, which probably corresponded to the mature and preenzyme, respectively. Biochemical studies showed that the recombinant enzyme had a similar thermostability, optimal pH, hypotensive effect, and sensitivity to different ions to the natural enzymes in human and porcine tissues. These data indicate that the chicken oviduct-specific transient expression system can produce relatively high level and authentic recombinant enzyme with a potential for further development for therapeutic use.
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Affiliation(s)
- B Gao
- College of Animal Science and Technology, Yangzhou University, People's Republic of China
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Tang YL, Tang Y, Zhang YC, Agarwal A, Kasahara H, Qian K, Shen L, Phillips MI. A hypoxia-inducible vigilant vector system for activating therapeutic genes in ischemia. Gene Ther 2006; 12:1163-70. [PMID: 15800659 DOI: 10.1038/sj.gt.3302513] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Hypoxia represents an endogenous pathophysiological signal underlying cell growth, adaptation and death in a variety of diseases, including ischemic heart diseases, stroke and solid tumors. A vigilant vector system depends on a gene switch which can sense the hypoxia signal occurring in ischemic events and turn on/off protective gene expressions when necessary. This system uses the oxygen-dependent degradation domain derived from hypoxia-inducible factor 1alpha as the hypoxia sensor and a double-vector system as signal amplifier. For treating ischemic heart diseases, a cardiac-specific MLC-2v promoter is used to deliver transgenes specifically to the heart. When tested in cardiomyocyte cultures, it produced a rapid and robust gene induction upon exposure to low oxygen. In a mouse model for myocardial infarction, the vigilant vectors turned on therapeutic genes such as heme oxygenase-1 in response to ischemia, significantly reduced apoptosis in the infarct area and improved cardiac functions. The hypoxia-regulated gene transfer afforded by the vigilant vectors may provide a powerful tool for delivering therapeutic proteins specifically to ischemic tissues with optimal physiological control.
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Affiliation(s)
- Y L Tang
- Department of Pediatrics, College of Medicine and All Children's Hospital Research Institute, University of South Florida, St Petersburg, FL 33701, USA
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Feng M, Xie J, Lu Q, Ji Y, Guo X, Yang J, Sun J, Liu D, Qian K. The Genetics Characteristics of HLA Alleles and Haplotypes in the Shanghai Han Population. Curr Genomics 2005. [DOI: 10.2174/1389202053642285] [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: 11/22/2022] Open
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36
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Palenik GJ, Qian K, Koziol AE, Sisler HH. Reactions of chloramine with methylpyridines. Synthesis and crystal structure of N-amino-3,5-dimethylpyridinium chloride. Inorg Chem 2002. [DOI: 10.1021/ic00345a021] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [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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37
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Li L, Zeng P, Ru W, Yuan H, Qian K. [The application of neural network to output estimation of an impeller artificial heart]. Sheng Wu Yi Xue Gong Cheng Xue Za Zhi 2001; 18:504-7. [PMID: 11791292] [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
In this paper, several methods of output estimation of artificial heart are introduced briefly, and the authors put forward a method for the application of neural network to the output estimation of an impeller artificial heart. According to the laboratory results, the application of neural network can solve the problem successfully.
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Affiliation(s)
- L Li
- Institute of Biomedical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212013
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38
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Hughey CA, Hendrickson CL, Rodgers RP, Marshall AG, Qian K. Kendrick mass defect spectrum: a compact visual analysis for ultrahigh-resolution broadband mass spectra. Anal Chem 2001; 73:4676-81. [PMID: 11605846 DOI: 10.1021/ac010560w] [Citation(s) in RCA: 375] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
At currently achievable Fourier transform ion cyclotron resonance broadband mass spectrometry resolving power (m/deltam50% > 350,000 for 200 < m/z < 1,000), it would be necessary to spread out a conventional mass spectrum over approximately 200 m in order to provide visual resolution of the most closely resolved peaks. Fortunately, there are natural gaps in a typical mass spectrum, spaced 1 Da apart, because virtually no commonly encountered elemental compositions yield masses at those values. Thus, it is possible to break a broadband mass spectrum into 1-Da segments, rotate each segment by 90 degrees, scale each segment according to its mass defect (i.e., difference between exact and nominal mass), and then compress the spacing between the segments to yield a compact display. For hydrocarbon systems, conversion from IUPAC mass to "Kendrick" mass (i.e., multiplying each mass by 14.00000/14.01565) further simplifies the display by rectilinearizing the peak patterns. The resulting display preserves not only the "coarse" spacings (e.g., approximately 1 Da between odd and even masses, corresponding to either even vs odd number of nitrogens or 12C(c) vs 12C(c-1)13C1 elemental compositions of the same molecule; approximately 2-Da separations, corresponding to a double bond or ring; approximately 14 Da separations, corresponding to one CH2 group) but also the "fine structure" (i.e., different mass defects for different elemental compositions) across each 1-Da segment. The method is illustrated for experimental electrospray ionization FTICR ultrahigh-resolution mass spectra of a petroleum crude oil. Several thousand elemental compositions may be resolved visually in a single one-page two-dimensional display, and various compound families-class (NnOoSs), type (Z in C(c)H2(c+z)NnOoSs), and alkylation series-may be identified visually as well.
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Affiliation(s)
- C A Hughey
- National High Magnetic Field Laboratory, Florida State University, Tallahassee 32310, USA
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39
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Qian K, Zeng P, Ru W, Yuan H, Feng Z, Li L. [Pulsatile rotary pumps with low hemolysis]. Sheng Wu Yi Xue Gong Cheng Xue Za Zhi 2001; 18:391-3. [PMID: 11605497] [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: 02/21/2023]
Abstract
As is well known, a pulsatile flow is important in assisted-circulation but it is difficult to produce a pulsatile flow with rotary pump, because excessive hemolysis will be generated. The authors have found that the turbulent shear is the main factor for red cell damage and therefore the key point of pulsatile rotary pumps is to reduce the turbulence by producing a pulsatile flow. In the authors' pulsatile axial pump, the pulsatile flow is obtained by axial reciprocation of constant rotating impeller; the rotation and reciprocation of the impeller are driven separately by a DC motor and a pneumatic device. Though a physiological pulsatile flow could be achieved and turbulence would not increase remarkably because the impeller rotates constantly, a second driver except a DC motor is nevertheless necessary, thus the system will become complicated. In the authors' pulsatile radial pump, a pulsatile flow is achieved by changing the rotating speed of the impeller periodically. Turbulence is minimized by a special design of twisted vanes which enable the blood flow to change its direction rather than its dimension during periodic change of rotating speed. Hemolysis tests demonstrated that the index of hemolysis(IH) of the author's pulsatile radial pump is 0.020, with is slightly more than that of the author's nonpulsatile radial pump(IH = 0.015). Animal experiments indicated that the pulsatile radial pump can assist the circulation of calves for several months without harm to blood elements and organ functions of the recipients.
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Affiliation(s)
- K Qian
- Institute of Biomedical Engineering, Jiangsu University of Science & Technology, Zhenjiang 212013
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40
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Tang X, Qian K, Lau JY. [Clinical implications of HCV quasispecies heterogeneity in patients with hepatitis C]. Zhonghua Shi Yan He Lin Chuang Bing Du Xue Za Zhi 2001; 15:173-5. [PMID: 11436653] [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: 04/16/2023]
Abstract
OBJECTIVE To determine the heterogeneity of viral quasispecies and its clinical significance in patients with hepatitis C. METHODS Quasispecies in the sera from 76 patients infected with hepatitis C virus were detected using single stranded conformational polymorphism (SSCP) analysis of the HCV E2 hypervariable region 1 (HVR1). RESULTS HVR1 was amplified in 72 (94.7%) of the 76 patients. The average number of SSCP bands was 5.8, with a range from 2 to 11. The numbers of quasispecies in acute hepatitis, chronic hepatitis and liver cirrhosis and/or primary hepatocellular carcinoma were 3.1 +/- 1.2, 6.0 +/- 2.3 and 8.4 +/- 4.1, respectively. There was a statistically significant difference among them (P < 0.01). Patients with infection acquired by blood transfusion and i.v. drug use had greater number of quasispecies than those acquired by other transmission pathway (sporadic) (P < 0.05). Patients with genotype 1 a and 1 b infection had increased quasispecies compared with those infected with HCV type 2 and 3(P < 0.05). Increased quasispecies heterogeneity was significantly correlated with serum HCV RNA levels (P < 0.01). CONCLUSIONS SSCP is a simple, rapid and reliable method for the analysis of HCV viral quasispecies heterogeneity. Quasispecies heterogeneity plays an important role in HCV persistent infection and in the progress of hepatitis C. The duration of HCV infection, HCV genotype and HCV viremia are important determinants for the evolution of HCV quasispecies heterogeneity.
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Affiliation(s)
- X Tang
- Institute of Infectious Diseases, Guangzhou 8th People's Hospital, Guangzhou 510060, China
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41
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Qian K, Wang S. Infections caused by Flavimonas oryzihabitans. Chin Med J (Engl) 2001; 114:394-8. [PMID: 11780462] [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 assess retrospectively the clinical characteristics and cell immune function of infections caused by Flavimonas oryzihabitans (F. oryzihabitans). METHODS We indentified 11 cases of F. oryzihabitans positive cultures from all microbial cultures collected in our hospital from November 1994 to December 1998. Relevant clinical information was collected, including demographic data, underlying disease, and clinical manifestations of the F. oryzihabitans infections. Minimal inhibitory concentrations (MICs) of 15 antimicrobial agents against the 11 F. oryzihabitans isolates were determined. Cell immune function tests were determined by flow cytometry including T lymphocyte subsets (CD3, CD4, CD8 and ratio CD4/CD8) and NK cells (CD16 + 56) from peripheral blood. RESULTS Six of these patients with infections caused by F. oryzihabitans were male, 5 were female and the mean age was 47.64 years (range, 5 to 69 years). All but 1 patients had severe underlying diseases. 9 (81.8%) of these patients developed infection while hospitalization and 2 (18.2%) before hospitalization (Cases 2 and 5). 8 (72.7%) of these patients manifested primary F. oryzihabitans bacteremia and one each (9.1%) had pleurisy, soft tissue infection and peritonitis. All these isolates were susceptible to amikacin, gentamicin and ciprofloxacin, but resistance to cefazolin, nitrofurantoin, penicillin and piperacillin. CD3, CD4, CD4/CD8 and CD16 + 56 value (mean +/- s) of these patients were significantly lower than normal values (P < 0.01). The mean time of body temperature fell < or = 37 degrees C after antibiotic treatment in these patients was 3.5 days (range, 1 to 6 days). All clinical symptom caused F. oryzihabitans after antibiotic treatment disappeared and all patients recovered. CONCLUSIONS Infections caused by F. oryzihabitans was very few clinically, and relative to underlying diseases and the presence of foreign material. Immune function abnormality was among mostly factor for the F. oryzihabitans infections.
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Affiliation(s)
- K Qian
- Department of Hematology and Oncology, Second People's Hospital of Changzhou, Changzhou 213003, China
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Abstract
BACKGROUND Aneroid manometers are frequently used to measure blood pressure. Aneroid manometers have moving parts that are subject to fatigue. The accuracy duration of the aneroid devices, like most digital devices, is unstudied. It has been accepted that if the aneroid device does not rest at '0' it is inaccurate, but how often is the device inaccurate when it does rest at '0'? METHODS A Universal Biometer DPM-III measuring unit was used for all of the measurements at 10 University of Michigan Health System sites. A total of 136 aneroid manometers were tested. Two additional aneroid devices were not tested, as the needle did not start within '0'. Static pressure measurements were made at nine levels for all devices: 50, 80, 90, 100, 120, 150, 200 and 250mmHg. RESULTS The average difference of the nine pressure settings of the whole group was 0.2+/-0.31 (95% confidence interval 0.1-0.2) mmHg. The largest number of devices that were not calibrated within +/-3mmHg was seen at the 150mmHg setting with six (4.4%) of the devices failing. If an accuracy standard of +/-2mmHg was used, the largest number of devices failed at 250mmHg (22 devices, 16.2%). The largest number of devices that were inaccurate was manufactured 6 years prior to testing and was from two sites. CONCLUSIONS Aneroid devices were accurate. A yearly calibration programme should be performed and a +/-2mmHg standard should be used. Portable aneroid manometers may need to be more frequently calibrated due to the trauma associated with dropping.
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Affiliation(s)
- S A Yarows
- Division of Hypertension, University of Michigan Health System, Chelsea, Michigan 48118, USA.
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Ma H, Tan G, Zhang Z, Yang J, Qian K, Ding J, Xie B. [Determination of chloramphenicol in chloramphenicol and dexamethasone sodium phosphate ear drops by first derivative spectrometry]. Hunan Yi Ke Da Xue Xue Bao 2001; 23:405-6. [PMID: 11189409] [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: 02/19/2023]
Abstract
Determination of chloramphenicol in the ear drops by first derivative spectrometry was studied. The detecting wavelength was 303.0 nm. The linear range was 0-65.2 micrograms.ml-1 (r = 0.9999). The average recovery was 99.84%, RSD = 0.37% (n = 8). The method is simple and accurate.
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Affiliation(s)
- H Ma
- Department of Pharmacy, Xiangya Hospital, Hunan Medical University, Changsha 410008
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Qian K, Zeng P, Ru W, Yuan H, Feng Z, Li L. [A permanent implantable pulsatile impeller heart with a specially devised needle bearing]. Sheng Wu Yi Xue Gong Cheng Xue Za Zhi 2001; 18:83-4. [PMID: 11332123] [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: 02/19/2023]
Abstract
The author's implantable pulsatile impeller pump can assist the circulation of the calves for several months. The termination of the experiments was related to wear of the mechanical bearing, which resulted in vibration of the rotor and pump failure. It seemed as if the experiments could have lasted indefinitely if the bearing had not failed. To solve the problem of bearing wear, a specially devised rolling bearing was investigated and applied to the impeller pump. Its service life is more than 10 years due to the wear-proof roller made of ultra-highmolecular weight polythene. This newly devised impeller heart promises to have long-term and permanent applications. Compared with the magnetic bearing, the rolling bearing has the advantages of simpler construction and control, no consumption of energy, and better reliability.
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Affiliation(s)
- K Qian
- Institute of Biomedical Engineering and Artificial Heart Laboratory, Jiangsu University of Science and Technology, Jiangsu 212013
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Lu H, Weng X, Yin Y, Chen Y, Jiang X, Wang H, Qian K, Zhu B, Peng B, Gong Z. [A study on the pathogenesis of Streptococcus mitis exotoxin]. Zhonghua Nei Ke Za Zhi 2001; 40:29-31. [PMID: 11798555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
OBJECTIVE To study the isolation, purification and pathogenesis of Streptococcus mitis pyrogenic exotoxin causing toxic shock syndrome. METHODS Streptococcus mitis isolated from patients' throat were shaking cultivated. After being centrifuged, the supernatant fluid of the culture was precipitated with 20%, 40%, 60%, 80% (NH(4))(2)SO(4) respectively and the fast protein liquid chromatography(FPLC) was used for the final step of purification. Rabbits receiving subcutaneous injection with respective purified proteins were monitored daily for fever. The ability of the purified proteins to enhance the susceptibility of the rabbits to lethal Escherichia coli endotoxin shock is recorded, when the endotoxin was injected intravenously 4 hours after administration of 10 microg Streptococcus mitis exotoxin. RESULTS Only the protein precipitated by 20% (NH(4))(2)SO(4) (molecular weight is 34,000) from culture supernatant fluid was pyrogenic for rabbits (average temperature increase near 1 degrees C), and it can also cause the proliferation of rabbit splenocytes (mitogenicity). All the animals receiving subcutaneous injection of exotoxin containing purified proteins precipitated with higher concentrations of (NH(4))(2)SO(4) died within 16 approximately 29 hours after intravenous injection of the Escherichia coli endotoxin, demonstrating the enhanced susceptibility of the animals to lethal endotoxin shock. The control rabbits displayed none of these effects. CONCLUSION Streptococcus mitis exotoxin is a novel streptococcal pyrogenic exotoxin.
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Affiliation(s)
- H Lu
- Huashan Hospital, Shanghai Medical University, Shanghai 200040, China
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Portman MA, Xiao Y, Qian K, Tucker RL, Parish SM, Ning XH. Thyroid hormone coordinates respiratory control maturation and adenine nucleotide translocator expression in heart in vivo. Circulation 2000; 102:1323-9. [PMID: 10982550 DOI: 10.1161/01.cir.102.11.1323] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND The signal transduction mechanism linking mitochondrial ATP synthesis with cytosolic ATP utilization in heart changes during postnatal development in vivo. This maturational process occurs in parallel with accumulation of mitochondrial adenine nucleotide translocator (ANT), which provides a possible site for respiratory control. We postulated that thyroid hormone regulates these maturational processes. METHODS AND RESULTS We used (31)P MR spectroscopy to determine the relationship between myocardial high-energy phosphates, phosphocreatine, and ADP and oxygen consumption (MVO(2)) during epinephrine stimulation in 32- to 40-day-old lambs thyroidectomized after birth (THY) and age-matched controls. Steady-state protein and mRNA levels for ANT isoforms and beta-F(1)-ATPase were assessed from left ventricular tissues by Western and Northern blotting. With greater doses of epinephrine, THY attained lower peak MVO(2) than controls (P:<0.05). Controls maintained high-energy phosphate levels, unlike THY, which demonstrated significantly decreased phosphocreatine/ATP and increased cytosolic ADP despite lower peak MVO(2). No significant differences in beta-F(1)-ATPase protein or mRNA occurred between groups. However, ANT isoform mRNA levels were 2-fold greater and protein levels 4-fold greater in control hearts. CONCLUSIONS These data imply that the maturational shift away from ADP-mediated respiratory control is regulated by thyroid hormone in vivo. Specific thyroid-modulated increases in ANT mRNA and protein imply that this regulation occurs in part at a pretranslational level.
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Affiliation(s)
- M A Portman
- Division of Cardiology, Department of Pediatrics, University of Washington School of Medicine, and Children's Hospital and Regional Medical Center, Seattle, WA 98105-0371, USA.
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Qian K, Zeng P, Ru W, Yuan H. [Effect of various assist pumps on recovering the ventricular function]. Sheng Wu Yi Xue Gong Cheng Xue Za Zhi 2000; 17:164-6. [PMID: 12557771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
With the authors' diaphragm pump and pulsatile as well as nonpulastile impeller pumps, and the clinically used Sarns Roller, both left ventricular assist and biventricular assist experiments were performed on mini pigs and calves. The results demonstrate that the pulsatile impeller pump is the best assist pump for recovering the heart function, because it maintains the pulsatility of aortic pressure by heart failure and thus increases the circulation volume, and it enlarges the diastolic pressure so as to increase the perfusion in coronary artery because it has no backflow.
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Affiliation(s)
- K Qian
- Inst of Biomed Eng., Jiangsu Uni of Sci & Tech, Zhenjiang 212013
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Slimane SB, Albrecht JK, Fang JW, Goodman Z, Mizokami M, Qian K, Lau JY. Clinical, virological and histological implications of GB virus-C/hepatitis G virus infection in patients with chronic hepatitis C virus infection: a multicentre study based on 671 patients. J Viral Hepat 2000; 7:51-5. [PMID: 10718943 DOI: 10.1046/j.1365-2893.2000.00188.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
To determine the prevalence, as well as the clinical, virological and histological implications of GB virus C/hepatitis G virus (GBC-C/HGV) infection in patients with chronic hepatitis C virus (HCV) infection, sera from 671 well-characterized patients with chronic HCV infection were tested for GBV-C/HGV RNA using a sensitive and specific reverse transcription 'nested' polymerase chain reaction (RT-nPCR). GBV-C/HGV RNA was detected in 65 of 671 (9. 7%) patients with chronic HCV infection. Importantly, GBV-C/HGV co-infection was not associated with any changes in indices of liver diseases, including serum alanine transaminase levels, Knodell score or histology activity index (HAI). In this cohort, GBV-C/HGV co-infection was weakly associated with a shorter mean estimated duration of HCV infection and a higher median HCV viraemia level. We conclude that GBV-C/HGV has minimal or no impact on liver disease activity in patients with chronic HCV infection. This data supports the notion that GBV-C/HGV may not be a hepatitis virus.
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MESH Headings
- Adult
- Female
- Flaviviridae/physiology
- Genotype
- Hepacivirus/physiology
- Hepatitis C, Chronic/complications
- Hepatitis C, Chronic/epidemiology
- Hepatitis C, Chronic/pathology
- Hepatitis C, Chronic/virology
- Hepatitis, Viral, Human/complications
- Hepatitis, Viral, Human/epidemiology
- Hepatitis, Viral, Human/pathology
- Hepatitis, Viral, Human/virology
- Humans
- Liver/pathology
- Male
- Middle Aged
- Prevalence
- RNA, Viral/blood
- Reverse Transcriptase Polymerase Chain Reaction
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Affiliation(s)
- S B Slimane
- Section of Hepatobiliary Diseases, Department of Medicine, University of Florida, Gainesville, FL, USA
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Gish RG, Qian K, Brooks L, Leung J, Xu Y, Pike I, Lau JY. Characterization of anti-hepatitis C virus-positive sera not genotyped by restriction fragment length polymorphism or serology. J Gastroenterol Hepatol 1999; 14:339-44. [PMID: 10207783 DOI: 10.1046/j.1440-1746.1999.01856.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
BACKGROUND The hepatitis C virus genome is extremely heterogeneous and has been classified into six major genotypes. Genotyping of hepatitis C has been achieved through both direct molecular approach and indirect detection of host genotype-specific antibodies by serological methods. The purpose of this study was to characterize anti-hepatitis C positive sera samples that were not genotyped either by restriction fragment length polymorphism or by serology. METHODS Two hundred and two patients from northern California with established chronic hepatitis C virus infection were studied by restriction fragment length polymorphism analysis of the 5'-untranslated region amplicon. A serological genotyping assay, based on synthetic peptides derived from non-structural region 4 of the hepatitis C virus genome, was used to determine serological genotype. RESULTS Of the 202 patients studied, 187 (93%) were polymerase chain reaction-positive. One hundred and eighty-six patients were able to be genotyped by restriction fragment length polymorphism, compared with 144/202 (71%) of patients genotyped by serology (P < 0.0001). Only two of 202 samples showed discordant genotyping results. The distribution of hepatitis C virus genotypes in northern California was found to be type 1a, 41%; 1b, 35%; 2a, 3%; 2b, 10%; 3a, 11%; and 4, < 1%. There was no association between hepatitis C genotypes and age, gender distribution, ethnic origin, presumptive mode of transmission, serum alanine aminotransferase levels and the proportion of patients with cirrhosis. Of the 15 patients who were not genotypable by the molecular assay, four patients were genotyped by serology, with hepatitis C virus genotypes 1, 2 and 3 represented. Of the 58 samples that were not genotyped by serology, 47 were genotyped based on the molecular assay, and the distribution of hepatitis C virus genotypes was similar to that of the overall study population. CONCLUSIONS These data showed that: (i) molecular genotyping assay based on 5'-untranslated region is more sensitive than serologic genotyping based on the non-structural-4 region but the results were highly concordant; (ii) hepatitis C virus genotypes 1-4 are present in northern California, with genotype 1 being the most prevalent; and (iii) the failure to determine hepatitis C virus genotype based on molecular or serological genotyping assay does not appear to be related to specific hepatitis C genotypes.
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Affiliation(s)
- R G Gish
- Department of Transplantation, California Pacific Medical Center, San Francisco, USA.
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Abstract
To determine the prevalence and clinical significance of hepatitis G virus (HGV)/GB virus C (GBV-C) infection in renal transplant recipients, prospectively collected serum samples from a cohort of cadaveric renal transplant patients were studied for the presence of HGV RNA using a sensitive reverse transcription 'nested'-polymerase chain reaction (RT-PCR) based on primers derived from the 5' untranslated region. All positive PCR amplicons were sequenced bidirectionally and aligned. The nucleotide substitution rate was estimated by the 6-parameter method, and a phylogenetic tree was constructed using the Neighbour-joining method. HGV RNA was detected in 11/93 (12%) patients pretransplant and in 15/90 (17%) patients 1-4 years post-transplant. All PCR amplicons were confirmed to be specific for HGV by sequencing. Phylogenetic tree construction revealed that 17 PCR amplicons had sequences related to HGV and one had a sequence related to GBV-C. Two HGV RNA-positive patients pretransplant became HGV RNA negative post-transplant, and seven HGV RNA-negative patients pretransplant became HGV RNA positive post-transplant. There was no relationship between hepatitis C virus (HCV) and HGV infection. There were also no differences in age, gender distribution, ethnic origin, the total number of blood units transfused and either graft or patient survival between patients who were positive or negative for HGV RNA. We conclude that HGV infection is common among renal transplant candidates and recipients. Most of the isolates had sequences related to the HGV prototype. HGV infection does not appear to adversely affect clinical outcome in renal transplant recipients during early follow-up.
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Affiliation(s)
- A H Isaacson
- Section of Hepatobiliary Diseases, Division of Gastroenterology, Hepatology, and Nutrition, University of Florida, Gainesville, USA
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