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Tian J, Zhao T, Tu R, Zhang B, Huang Y, Shen Z, Wang Y, Du G. Achromobacter species (sp.) outbreak caused by hospital equipment containing contaminated water: risk factors for infection. J Hosp Infect 2024; 146:141-147. [PMID: 38403082 DOI: 10.1016/j.jhin.2024.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 01/30/2024] [Accepted: 02/07/2024] [Indexed: 02/27/2024]
Abstract
BACKGROUND Nosocomial outbreaks of urinary tract infections caused by Achromobacter spp. have been rare in recent decades. AIM To identify the origin of an Achromobacter sp. outbreak, conduct multi-modal infection control measures, and finally to stop the outbreak. To this end, an epidemiological outbreak investigation and risk factor analysis were performed. METHODS Achromobacter sp. was detected in 22 patients in our urology wards and six environmental cultures of specimens obtained from the operating rooms. Strains isolated were submitted for antimicrobial susceptibility testing. An on-site epidemiological investigation, evaluation of patient medical records, and environmental sampling were performed to identify the source of the outbreak, and implementation of infection control intervention. A case-control study was performed to analyse the potential risk factors. FINDINGS Environmental sampling showed that the source of the infection for 22 patients was an ISA-IIIA-type medical pressurizer containing contaminated water. A case-control analysis showed that the risk factors for infection were: diagnosis of kidney/ureteral stones, surgery, placement of a double-J stent, and history of hospitalization in the past three months. CONCLUSION It was concluded that the outbreak occurred in patients who underwent internal lithotripsy and double-J stent placement, due to contact transmission with the contaminated sensor and connecting tubes of the ISA-IIIA-type medical pressurizer.
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Affiliation(s)
- J Tian
- Department of Infection and Management, The First People's Hospital of Guiyang, Guizhou, China
| | - T Zhao
- Department of Infection and Management, The First People's Hospital of Guiyang, Guizhou, China
| | - R Tu
- Department of Infection and Management, The First People's Hospital of Guiyang, Guizhou, China
| | - B Zhang
- Department of Infection and Management, The First People's Hospital of Guiyang, Guizhou, China
| | - Y Huang
- Department of Urology, The First People's Hospital of Guiyang, Guizhou, China
| | - Z Shen
- Department of Nursing, The First People's Hospital of Guiyang, Guizhou, China
| | - Y Wang
- Department of Clinical Laboratory, The First People's Hospital of Guiyang, Guizhou, China
| | - G Du
- Department of Infection and Management, The First People's Hospital of Guiyang, Guizhou, China.
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Zhou H, Zhang Z, Yang S, Gong X, Liu Y, Du G, Chen J. Logistic regression analysis of risk factors for intra-abdominal hypertension after giant ventral hernia repair: a retrospective cohort study. Hernia 2022; 27:305-309. [PMID: 36169738 DOI: 10.1007/s10029-022-02667-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Accepted: 08/17/2022] [Indexed: 11/26/2022]
Abstract
BACKGROUND Intra-abdominal hypertension (IAH) is a classical complication after giant ventral hernia surgery and may lead to abdominal compartment syndrome (ACS). Assessment of risk factors and prevention of IAH/ACS are essential for hernia surgeons. METHODS We performed a retrospective study including 58 giant ventral hernia patients in our center between Jan 1, 2017, and Mar 1, 2022, we recorded age, gender, chronic obstructive pulmonary disease (COPD), coronary heart disease (CHD), hypertension, type 2 diabetes mellitus (T2DM), hypoproteinemia, body mass index (BMI), the ratio of hernia sac volume to abdominal cavity volume (HSV/ACV), defect width, tension reduction procedure (TRP), positive fluid balance (PFB) and IAH of these patients and analyzed the data using univariate and multivariate logistic regression to screen the risk factors for IAH after surgery. RESULTS The multivariate analysis showed that HSV/ACV ≥ 25%, hypoproteinemia, and PFB were independent risk factors for the occurrence of IAH after giant ventral hernia repair (P = 0.025, 0.016, 0.017, respectively). We did not find any correlation between postoperative IAH and the patient's age, gender, COPD, CHD, hypertension, T2DM, BMI, defect width, TRP, and PFB. CONCLUSION Identifying risk factors is of great significance for the early identification and prevention of IAH/ACS. We found that HSV/ACV ≥ 25%, hypoproteinemia, and PFB were independent risk factors for IAH after giant ventral hernia repair.
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Affiliation(s)
- H Zhou
- The Third Clinical Medical School of Capital Medical University, 8 Gongren Tiyuchang Nanlu, Chaoyang District, Beijing, 100020, China
| | - Z Zhang
- The Third Clinical Medical School of Capital Medical University, 8 Gongren Tiyuchang Nanlu, Chaoyang District, Beijing, 100020, China
| | - S Yang
- Department of Hernia and Abdominal Wall Surgery, Beijing Chaoyang Hospital, No. 5 JingYuan Road, Shijingshan District, Beijing, 100043, China
| | - X Gong
- Department of Radiology, Beijing Chao-Yang Hospital, No. 5 JingYuan Road, Shijingshan District, Beijing, 100043, China
| | - Y Liu
- Department of Hernia and Abdominal Wall Surgery, Beijing Chaoyang Hospital, No. 5 JingYuan Road, Shijingshan District, Beijing, 100043, China
| | - G Du
- Department of Radiology, Lin Yi Geriatric Hospital, Lanshan District, Linyi, 276003, China
| | - J Chen
- The Third Clinical Medical School of Capital Medical University, 8 Gongren Tiyuchang Nanlu, Chaoyang District, Beijing, 100020, China.
- Department of Hernia and Abdominal Wall Surgery, Beijing Chaoyang Hospital, No. 5 JingYuan Road, Shijingshan District, Beijing, 100043, China.
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Liu J, Chen M, Ma L, Dang X, Du G. piRNA-36741 regulates BMP2-mediated osteoblast differentiation via METTL3 controlled m6A modification. Aging (Albany NY) 2021; 13:23361-23375. [PMID: 34645714 PMCID: PMC8544320 DOI: 10.18632/aging.203630] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 09/20/2021] [Indexed: 04/21/2023]
Abstract
The osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs) is essential for bone formation, and its imbalance can lead to bone diseases such as osteoporosis. It is reported that PIWI-interacting RNA-36741 (piR-36741) is up-regulated during the osteogenic differentiation, but its role in regulating osteogenic differentiation remains unclear. Here, the primary human BMSCs were used to induce osteogenic differentiation, and the expression of piR-36741 and METTL3 (methyltransferase like 3) was up-regulated during the osteogenic differentiation of BMSCs. Moreover, interference with piR-36741 or METTL3 markedly hindered the osteogenic differentiation of BMSCs, which was manifested by a reduction in osteoblast marker expression (including RUNX2, COL1A1, OPN and OCN), osteogenic phenotype and matrix mineralization. Mechanistically, the piR-36741-PIWIL4 complex directly interacted with METTL3 and prevented METTL3-mediated m6A modification of BMP2 mRNA transcripts, thereby promoting BMP2 expression. And overexpression of BMP2 reversed the inhibitory effect of piR-36741 silence on osteogenic differentiation and the Smad pathway activity. In addition, administration with piR-36741 mimic alleviated ovariectomy-induced osteoporosis in mice. In conclusion, piRNA-36741 overexpression promoted osteogenic differentiation of BMSCs and mitigated ovariectomy-induced osteoporosis through METTL3-mediated m6A methylation of BMP2 transcripts.
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Affiliation(s)
- Jianmin Liu
- Surgery Department, Shaanxi Provincial People’s Hospital, Xi’an 710068, China
| | - Ming Chen
- Department of Orthopedics, Shaanxi Provincial People’s Hospital, Xi’an 710068, China
| | - Longyang Ma
- Surgery Department, Shaanxi Provincial People’s Hospital, Xi’an 710068, China
| | - Xingbo Dang
- Surgery Department, Shaanxi Provincial People’s Hospital, Xi’an 710068, China
| | - Gongliang Du
- Surgery Department, Shaanxi Provincial People’s Hospital, Xi’an 710068, China
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4
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Kalam A, Al-Sehemi A, Alrumman S, Du G, Assiri M, Hesham AEL. Antibacterial studies of bio-functionalized carbon decorated silver nanoparticles (AgNPs). J INDIAN CHEM SOC 2021. [DOI: 10.1016/j.jics.2021.100155] [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: 10/20/2022]
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Liu J, Chen M, Ma L, Dang X, Du G. LncRNA GAS5 Suppresses the Proliferation and Invasion of Osteosarcoma Cells via the miR-23a-3p/PTEN/PI3K/AKT Pathway. Cell Transplant 2021; 29:963689720953093. [PMID: 33121268 PMCID: PMC7784500 DOI: 10.1177/0963689720953093] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Accumulating evidence has shown that long noncoding RNA GAS5 is a well-known tumor suppressor in the pathogenesis of a variety of human cancers. However, the detailed role of GAS5 in osteosarcoma is still largely unclear. In this study, we found that GAS5 was downregulated in human osteosarcoma tissues and cell lines compared with matched adjacent tissues and normal osteoblast cells. Overexpression of GAS5 could significantly suppress the growth and invasion of osteosarcoma cells, while downregulation of GAS5 promoted cell proliferation and invasion. We confirmed that GAS5 could directly bind with miR-23a-3p by using luciferase reporter gene and RNA immunoprecipitation and pull-down assay. Downregulation of miR-23a-3p repressed cell proliferation and invasion. Overexpression of miR-23a-3p counterbalanced the inhibition effect of GAS5 on cell proliferation and invasion. Further studies indicated that overexpression of GAS5 inhibited cell proliferation and metastasis by regulating phosphatase and tensin homolog (PTEN). PTEN was authenticated as a target of miR-23a-3p. Upregulation of GAS5 or silence of miR-23a-3p increased the level of PTEN, while downregulation of GAS5 or overexpression of miR-23a-3p suppressed the expression of PTEN. In addition, overexpression of GAS5 could neutralize the effect of downregulating PTEN on osteosarcoma cell functions. We proved that GAS5 regulated the viability and invasion of osteosarcoma cells through the PI3K/AKT pathway. Moreover, overexpression of GAS5 could inhibit tumor growth in a xenograft nude mouse model in vivo. In summary, GAS5 functions as a competing endogenous RNA, sponging miR-23a-3p, to promote PTEN expression and suppress cell growth and invasion in osteosarcoma by regulating the PI3K/AKT pathway.
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Affiliation(s)
- Jianmin Liu
- Department of Emergency Surgery, Shaanxi Provincial People's Hospital (Affiliated Hospital of Xi'an Medical University), Xi'an, China
| | - Ming Chen
- Department of Orthopedics, Shaanxi Provincial People's Hospital (Affiliated Hospital of Xi'an Medical University), Xi'an, China
| | - Longyang Ma
- Department of Emergency Surgery, Shaanxi Provincial People's Hospital (Affiliated Hospital of Xi'an Medical University), Xi'an, China
| | - Xingbo Dang
- Department of Emergency Surgery, Shaanxi Provincial People's Hospital (Affiliated Hospital of Xi'an Medical University), Xi'an, China
| | - Gongliang Du
- Department of Emergency Surgery, Shaanxi Provincial People's Hospital (Affiliated Hospital of Xi'an Medical University), Xi'an, China
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Seshadri MR, Fontán L, Scott D, Hatcher J, Sreevatsan P, Du G, Qiao Q, Wu H, Us I, Xia M, Gray N, Melnick A. MALT1 DEGRADATION FOR THE TREATMENT OF ACTIVATED B‐CELL TYPE DIFFUSE LARGE B‐CELL LYMPHOMA. Hematol Oncol 2021. [DOI: 10.1002/hon.12_2879] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- M. R Seshadri
- Weill Cornell Medicine Department of Medicine Division of Hematology and Oncology New York New York USA
| | - L Fontán
- Weill Cornell Medicine Department of Medicine Division of Hematology and Oncology New York New York USA
| | - D Scott
- Dana Farber Cancer Institute Harvard Medical School Department of Biological Chemistry and Molecular Pharmacology Boston Massachusetts USA
| | - J Hatcher
- Dana Farber Cancer Institute Harvard Medical School Department of Biological Chemistry and Molecular Pharmacology Boston Massachusetts USA
| | - P Sreevatsan
- Dana Farber Cancer Institute Harvard Medical School Department of Biological Chemistry and Molecular Pharmacology Boston Massachusetts USA
| | - G Du
- Dana Farber Cancer Institute Harvard Medical School Department of Biological Chemistry and Molecular Pharmacology Boston Massachusetts USA
| | - Q Qiao
- Boston Children's Hospital Harvard Medical School Program in Cellular and Molecular Medicine Boston Massachusetts USA
| | - H Wu
- Boston Children's Hospital Harvard Medical School Program in Cellular and Molecular Medicine Boston Massachusetts USA
| | - I Us
- Weill Cornell Medicine Department of Medicine Division of Hematology and Oncology New York New York USA
| | - M Xia
- Weill Cornell Medicine Department of Medicine Division of Hematology and Oncology New York New York USA
| | - N Gray
- Stanford University Department of Chemical and Systems Biology Stanford California USA
| | - A Melnick
- Weill Cornell Medicine Department of Medicine Division of Hematology and Oncology New York New York USA
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Liu Y, Du G, Li X. Threshold for lateral meniscal body extrusion on MRI in middle-aged and elderly patients with symptomatic knee osteoarthritis. Diagn Interv Imaging 2020; 101:677-683. [DOI: 10.1016/j.diii.2020.05.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Revised: 05/03/2020] [Accepted: 05/30/2020] [Indexed: 12/12/2022]
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8
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Leone M, Romeijn S, Du G, Le Dévédec S, Vrieling H, O'Mahony C, Bouwstra J, Kersten G. Diphtheria toxoid dissolving microneedle vaccination: Adjuvant screening and effect of repeated-fractional dose administration. Int J Pharm 2020; 580:119182. [DOI: 10.1016/j.ijpharm.2020.119182] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 02/25/2020] [Accepted: 02/25/2020] [Indexed: 12/13/2022]
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Ma L, Fan Z, Du G, Wang H. Leptin-elicited miRNA-342-3p potentiates gemcitabine resistance in pancreatic ductal adenocarcinoma. Biochem Biophys Res Commun 2019; 509:845-853. [PMID: 30638935 DOI: 10.1016/j.bbrc.2019.01.030] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [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: 01/04/2019] [Accepted: 01/06/2019] [Indexed: 12/16/2022]
Abstract
Although obesity (characterized by high levels of serum leptin) and deregulated expression of miRNAs are both functionally implicated in the pathogenesis of chemoresistance of pancreatic ductal adenocarcinoma (PDAC), the mechanistic link synchronize these two factors remain poorly understood. Here, we show that expression levels of obesity-associated miR-342-3p were significantly upregulated in gemcitabine (GEM)-resistant PDAC tissues and cells, and this upregulation was associated with poor postchemotherapy prognosis. Using pharmacological approaches, we observed that crosstalk between leptin and Notch signaling pathways regulated fundamentally the miR-342-3p expression in GEM-resistant PDAC cells. Functionally, forced expression of miR-342-3p exhibited a prosurvival effect and potentiated GEM resistance, whereas inhibition of miR-342-3p expression noticeably ameliorated chemosensitivity in GEM-resistant PDAC cells. By employing bioinformatics analysis, point mutation and luciferase reporter assays, we further identified the 3'-UTR of tumor suppressor Krüppel-like factor 6 (KLF6) as the direct target of miR-342-3p. Therapeutically, stable expression of the exogenous KLF6 was sufficient to abrogate the pro-survival effects of miR-342-3p in GEM-treated PDAC cells. Taken together, these results suggest that leptin-elicited miR-342-3p upregulation mediates, at least partially, the GEM resistance through inhibition of KLF6 signaling in PDAC. Considering the indispensable function of miR-342-3p during adipogenesis, this obesity-associated miRNA may operate as a novel posttranscriptional integrator linking lipid homeostasis and pancreatic chemoresistance.
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Affiliation(s)
- Longyang Ma
- Department of Acute Care Surgery, Shaanxi Provincial People's Hospital, Xi'an, 710068, China
| | - Zhiyong Fan
- Department of Hepatobiliary Surgery, Shaanxi Provincial People's Hospital, Xi'an, 710068, China
| | - Gongliang Du
- Department of Acute Care Surgery, Shaanxi Provincial People's Hospital, Xi'an, 710068, China
| | - Hui Wang
- Department of Acute Care Surgery, Shaanxi Provincial People's Hospital, Xi'an, 710068, China.
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10
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Dang X, Du G, Hu W, Ma L, Wang P, Li Y. Peroxisome proliferator‐activated receptor gamma coactivator‐1α/HSF1 axis effectively alleviates lipopolysaccharide‐induced acute lung injury via suppressing oxidative stress and inflammatory response. J Cell Biochem 2018; 120:544-551. [PMID: 30216506 DOI: 10.1002/jcb.27409] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 07/11/2018] [Indexed: 11/05/2022]
Affiliation(s)
- Xingbo Dang
- Department of Emergency Surgery Shannxi Provincial People‘s Hospital Xi’an Shannxi China
| | - Gongliang Du
- Department of Emergency Surgery Shannxi Provincial People‘s Hospital Xi’an Shannxi China
| | - Wei Hu
- Department of Emergency Surgery Shannxi Provincial People‘s Hospital Xi’an Shannxi China
| | - Longyang Ma
- Department of Emergency Surgery Shannxi Provincial People‘s Hospital Xi’an Shannxi China
| | - Pei Wang
- Department of Emergency Surgery Shannxi Provincial People‘s Hospital Xi’an Shannxi China
| | - Yi Li
- Department of Emergency Surgery Shannxi Provincial People‘s Hospital Xi’an Shannxi China
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Liu K, Cao S, Du G, Baskin JM, Baskin CC, Bu H, Qi W, Ting L. Linking seed germination and plant height: a case study of a wetland community on the eastern Tibet Plateau. Plant Biol (Stuttg) 2018; 20:886-893. [PMID: 29779257 DOI: 10.1111/plb.12845] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 05/15/2018] [Indexed: 06/08/2023]
Abstract
Seed germination is the earliest trait expressed in a plant's life history, and it can directly affect the expression of post-germination traits. Plant height is central to plant ecological strategies, because it is a major determinant of the ability of a species to compete for light. Thus, linking seed germination and plant height at the community level is very important to understanding plant fitness and community structure. Here, we tested storage condition and temperature requirements for germination of 31 species from a wetland plant community on the eastern Tibet Plateau and analysed correlation of germination traits with plant height in relation to storage condition. Germination percentage was positively related to plant height, and this relationship disappeared when seeds were incubated at a low temperature (i.e. 5 °C) or after they were stored under wet-cold conditions. The response of seeds to dry+wet-cold storage was negatively related to plant height. Based on the scores of each species on the first two principal components derived from PCA, species were classified into two categories by hierarchical clustering, and there was a significant difference between germination and plant height of species in these two categories. These results suggest that the requirements for seed germination together with seasonal change in environmental conditions determine the window for germination and, in turn, plant growth season and resource utilisation and ultimately plant height.
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Affiliation(s)
- K Liu
- State Key Laboratory of Grassland and Agro-ecosystems, Lanzhou University, Lanzhou, China
| | - S Cao
- State Key Laboratory of Grassland and Agro-ecosystems, Lanzhou University, Lanzhou, China
| | - G Du
- State Key Laboratory of Grassland and Agro-ecosystems, Lanzhou University, Lanzhou, China
| | - J M Baskin
- Department of Biology, University of Kentucky, Lexington, USA
| | - C C Baskin
- Department of Biology, University of Kentucky, Lexington, USA
- Department of Plant and Soil Sciences, University of Kentucky, Lexington, USA
| | - H Bu
- State Key Laboratory of Grassland and Agro-ecosystems, Lanzhou University, Lanzhou, China
| | - W Qi
- State Key Laboratory of Grassland and Agro-ecosystems, Lanzhou University, Lanzhou, China
| | - L Ting
- State Key Laboratory of Grassland and Agro-ecosystems, Lanzhou University, Lanzhou, China
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Du G, Zhuang P, Hallett M, Zhang YQ, Li JY, Li YJ. Properties of oscillatory neuronal activity in the basal ganglia and thalamus in patients with Parkinson's disease. Transl Neurodegener 2018; 7:17. [PMID: 30065816 PMCID: PMC6062949 DOI: 10.1186/s40035-018-0123-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Accepted: 07/03/2018] [Indexed: 01/28/2023] Open
Abstract
Background The cardinal features of Parkinson’s disease (PD) are bradykinesia, rigidity and rest tremor. Abnormal activity in the basal ganglia is predicted to underlie the mechanism of motor symptoms. This study aims to characterize properties of oscillatory activity in the basal ganglia and motor thalamus in patients with PD. Methods Twenty-nine patients with PD who underwent bilateral or unilateral electrode implantation for subthalamic nucleus (STN) DBS (n = 11), unilateral pallidotomy (n = 9) and unilateral thalamotomy (n = 9) were studied. Microelectrode recordings in the STN, globus pallidus internus (GPi) and ventral oral posterior/ventral intermediate of thalamus (Vop/Vim) were performed. Electromyography of the contralateral limbs was recorded. Single unit characteristics including interspike intervals were analyzed. Spectral and coherence analyses were assessed. Mean spontaneous firing rate (MSFR) of neurons was calculated. Analysis of variance and X2 test were performed. Results Of 76 STN neurons, 39.5% were 4–6 Hz band oscillatory neurons and 28.9% were β frequency band (βFB) oscillatory neurons. The MSFR was 44.2 ± 7.6 Hz. Of 62 GPi neurons, 37.1% were 4–6 Hz band oscillatory neurons and 27.4% were βFB neurons. The MSFR was 80.9 ± 9.6 Hz. Of 44 Vop neurons, 65.9% were 4–6 Hz band oscillatory neurons and 9% were βFB neurons. The MSFR was 24.4 ± 4.2 Hz. Of 30 Vim oscillatory neurons, 70% were 4–6 Hz band oscillatory neurons and 13.3% were βFB neurons. The MSFR was 30.3 ± 3.6 Hz. Further analysis indicated that proportion of βFB oscillatory neurons in STN and GPi was higher than that of similar neurons in the Vop and Vim (P < 0.05). Conversely, the proportion of 4–6 Hz band oscillatory neurons and tremor related neurons in the Vim and Vop was higher than that of STN and GPi (P < 0.05). The highest MSFR was for GPi oscillatory neurons whereas the lowest MSFR was for Vop oscillatory neurons (P < 0.005). Conclusion The alterations in neuronal activity in basal ganglia play a critical role in generation of parkinsonism. β oscillatory activity is more prominent in basal ganglia than in thalamus suggesting that the activity likely results from dopaminergic depletion. While both basal ganglia and thalamus have tremor activity, the thalamus appears to play a more important role in tremor production, and basal ganglia β oscillatory activity might be the trigger.
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Affiliation(s)
- G Du
- 1Beijing Institute of Functional Neurosurgery, Xuanwu Hospital, Capital Medical University, No.45 Changchun Street , Xicheng District, Beijing, 100053 China
| | - P Zhuang
- 1Beijing Institute of Functional Neurosurgery, Xuanwu Hospital, Capital Medical University, No.45 Changchun Street , Xicheng District, Beijing, 100053 China.,3Center of Parkinson's disease, Beijing Institute for Brain Disorders, Beijing, China.,4Key Laboratory of Neurodegenerative Diseases (Capital Medical University), Ministry of Education, Beijing, China
| | - M Hallett
- Human Motor Control Section, Medical Neurology Branch, NINDS, NIH, Bethesda, MD USA
| | - Y-Q Zhang
- 1Beijing Institute of Functional Neurosurgery, Xuanwu Hospital, Capital Medical University, No.45 Changchun Street , Xicheng District, Beijing, 100053 China
| | - J-Y Li
- 1Beijing Institute of Functional Neurosurgery, Xuanwu Hospital, Capital Medical University, No.45 Changchun Street , Xicheng District, Beijing, 100053 China
| | - Y-J Li
- 1Beijing Institute of Functional Neurosurgery, Xuanwu Hospital, Capital Medical University, No.45 Changchun Street , Xicheng District, Beijing, 100053 China
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13
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Zhang M, Yang L, Du G, Duan S, Liu D, Gao X, Li D. Early diagnosis of infection occurs in burned patients and verification in vitro. Int J Lab Hematol 2018; 40:448-452. [PMID: 29575661 DOI: 10.1111/ijlh.12810] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2017] [Accepted: 02/06/2018] [Indexed: 11/27/2022]
Affiliation(s)
- M. Zhang
- First Affiliated Hospital of Guangxi Medical University; Nanning Guangxi China
| | - L. Yang
- First Affiliated Hospital of Guangxi Medical University; Nanning Guangxi China
- First Affiliated Hospital of Guangxi University of Chinese Medicine; Nanning Guangxi China
| | - G. Du
- First Affiliated Hospital of Guangxi Medical University; Nanning Guangxi China
| | - S. Duan
- Medical College of Guangxi University of Science and Technology; Liuzhou Guangxi China
| | - D. Liu
- First Affiliated Hospital of Guangxi Medical University; Nanning Guangxi China
| | - X. Gao
- First Affiliated Hospital of Guangxi Medical University; Nanning Guangxi China
| | - D. Li
- First Affiliated Hospital of Guangxi Medical University; Nanning Guangxi China
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Huang G, Ye L, Du G, Huang Y, Wu Y, Ge S, Yang Z, Zhu G. Effects of curcumin plus Soy oligosaccharides on intestinal flora of rats with ulcerative colitis. Cell Mol Biol (Noisy-le-grand) 2017; 63:20-25. [PMID: 28838334 DOI: 10.14715/cmb/2017.63.7.3] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Indexed: 12/16/2023]
Abstract
To explore the therapeutic effect of curcumin (Cur) and soybean oligosaccharides (SBOS) on ulcerative colitis (UC) through testing the intestinal flora and ulcerative colitis (UC). 80 male SD rats were selected divided into four groups with 20 rats in each group: normal group, sulfasalazine (SASP) group, model group and group of curcumin plus soy oligosaccharide. All animals were treated for 4 weeks. In the fifth week rats were decapitated. Macroscopic damage scores of colonic mucosa were calculated. A 4mL blood sample was taken to detect the contents of serum tumor necrosis factor -α (TNF-α) and interleukin 8 (IL-8) by the double antibody sandwich ABC-ELISA method (enzyme-linked immunosorbent assay). Colonic tissues with the most obvious lesions were obtained using a surgical scissor. A routine hematoxylin-eosin (HE) staining method was used to stain pathological specimens and images of staining results were obtained. Histological injury scores of colonic mucosa were calculated. Ulcerative colitis model rats had the highest macroscopic damage scores and histological injury scores of colonic mucosa. After treatment the contents of TNF-α and IL-8 decreased significantly in the group of curcumin plus soy oligosaccharide compared with the model group with statistical significance (P <0.01) while the contents were close to those in the SASP group. There was no statistical significance (P> 0.05). The treatment could decrease TNF-α and IL- 8 expression and reduce colonic mucosa inflammation and tissue damage.
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Affiliation(s)
- G Huang
- Department of Integrated Traditional Chinese and Western Medicine, the First Affiliated Hospital of Nanchang University, No. 17 Yongwai Street, Nanchang, Jiangxi, 330006, China
| | - L Ye
- Department of Surgery, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - G Du
- Department of Surgery, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Y Huang
- Department of Integrated Traditional Chinese and Western Medicine, the affiliated Hengyang hospital of Hunan university of Chinese medicine, Hunan Hengyang 421001, China
| | - Y Wu
- Department of Integrated Traditional Chinese and Western Medicine, the First Affiliated Hospital of Nanchang University, No. 17 Yongwai Street, Nanchang, Jiangxi, 330006, China
| | - S Ge
- Department of infectious disease, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China
| | - Z Yang
- Department of endocrinology, the First Affiliated Hospital of Nanchang University, No. 17 Yongwai Street, Nanchang, Jiangxi 330006, China
| | - G Zhu
- Department of Surgery, the First Affiliated Hospital of Nanchang University, Nanchang 330006, China
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Du G, Lewis MM, Kanekar S, Sterling NW, He L, Kong L, Li R, Huang X. Combined Diffusion Tensor Imaging and Apparent Transverse Relaxation Rate Differentiate Parkinson Disease and Atypical Parkinsonism. AJNR Am J Neuroradiol 2017; 38:966-972. [PMID: 28364007 DOI: 10.3174/ajnr.a5136] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2016] [Accepted: 01/11/2017] [Indexed: 12/12/2022]
Abstract
BACKGROUND AND PURPOSE Both diffusion tensor imaging and the apparent transverse relaxation rate have shown promise in differentiating Parkinson disease from atypical parkinsonism (particularly multiple system atrophy and progressive supranuclear palsy). The objective of the study was to assess the ability of DTI, the apparent transverse relaxation rate, and their combination for differentiating Parkinson disease, multiple system atrophy, progressive supranuclear palsy, and controls. MATERIALS AND METHODS A total of 106 subjects (36 controls, 35 patients with Parkinson disease, 16 with multiple system atrophy, and 19 with progressive supranuclear palsy) were included. DTI and the apparent transverse relaxation rate measures from the striatal, midbrain, limbic, and cerebellar regions were obtained and compared among groups. The discrimination performance of DTI and the apparent transverse relaxation rate among groups was assessed by using Elastic-Net machine learning and receiver operating characteristic curve analysis. RESULTS Compared with controls, patients with Parkinson disease showed significant apparent transverse relaxation rate differences in the red nucleus. Compared to those with Parkinson disease, patients with both multiple system atrophy and progressive supranuclear palsy showed more widespread changes, extending from the midbrain to striatal and cerebellar structures. The pattern of changes, however, was different between the 2 groups. For instance, patients with multiple system atrophy showed decreased fractional anisotropy and an increased apparent transverse relaxation rate in the subthalamic nucleus, whereas patients with progressive supranuclear palsy showed an increased mean diffusivity in the hippocampus. Combined, DTI and the apparent transverse relaxation rate were significantly better than DTI or the apparent transverse relaxation rate alone in separating controls from those with Parkinson disease/multiple system atrophy/progressive supranuclear palsy; controls from those with Parkinson disease; those with Parkinson disease from those with multiple system atrophy/progressive supranuclear palsy; and those with Parkinson disease from those with multiple system atrophy; but not those with Parkinson disease from those with progressive supranuclear palsy, or those with multiple system atrophy from those with progressive supranuclear palsy. CONCLUSIONS DTI and the apparent transverse relaxation rate provide different but complementary information for different parkinsonisms. Combined DTI and apparent transverse relaxation rate may be a superior marker for the differential diagnosis of parkinsonisms.
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Affiliation(s)
- G Du
- From the Departments of Neurology (G.D., M.M.L., N.W.S., L.H., X.H.)
| | - M M Lewis
- From the Departments of Neurology (G.D., M.M.L., N.W.S., L.H., X.H.)
- Pharmacology (M.M.L., X.H.)
| | | | - N W Sterling
- From the Departments of Neurology (G.D., M.M.L., N.W.S., L.H., X.H.)
| | - L He
- From the Departments of Neurology (G.D., M.M.L., N.W.S., L.H., X.H.)
- Department of Public Health (L.H.), Shanxi Medical University, Taiyuan, China
| | - L Kong
- Public Health Sciences (L.K.), Pennsylvania State University-Milton S. Hershey Medical Center, Hershey, Pennsylvania
| | - R Li
- Department of Statistics (R.L.), Pennsylvania State University, University Park, Pennsylvania
| | - X Huang
- From the Departments of Neurology (G.D., M.M.L., N.W.S., L.H., X.H.)
- Radiology (S.K., X.H.)
- Pharmacology (M.M.L., X.H.)
- Neurosurgery (X.H.)
- Kinesiology (X.H.)
- Bioengineering (X.H.)
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16
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Bins S, van Doorn L, Phelps MA, Gibson AA, Hu S, Li L, Vasilyeva A, Du G, Hamberg P, Eskens F, de Bruijn P, Sparreboom A, Mathijssen R, Baker SD. Influence of OATP1B1 Function on the Disposition of Sorafenib-β-D-Glucuronide. Clin Transl Sci 2017; 10:271-279. [PMID: 28371445 PMCID: PMC5504481 DOI: 10.1111/cts.12458] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2016] [Accepted: 01/27/2017] [Indexed: 01/05/2023] Open
Abstract
The oral multikinase inhibitor sorafenib undergoes extensive UGT1A9-mediated formation of sorafenib-β-D-glucuronide (SG). Using transporter-deficient mouse models, it was previously established that SG can be extruded into bile by ABCC2 or follow a liver-to-blood shuttling loop via ABCC3-mediated efflux into the systemic circulation, and subsequent uptake in neighboring hepatocytes by OATP1B-type transporters. Here we evaluated the possibility that this unusual process, called hepatocyte hopping, is also operational in humans and can be modulated through pharmacological inhibition. We found that SG transport by OATP1B1 or murine Oatp1b2 was effectively inhibited by rifampin, and that this agent can significantly increase plasma levels of SG in wildtype mice, but not in Oatp1b2-deficient animals. In human subjects receiving sorafenib, rifampin acutely increased the systemic exposure to SG. Our study emphasizes the need to consider hepatic handling of xenobiotic glucuronides in the design of drug-drug interaction studies of agents that undergo extensive phase II conjugation.
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Affiliation(s)
- S Bins
- Department of Medical Oncology, Erasmus MC Cancer Institute, Wytemaweg, Rotterdam, The Netherlands
| | - L van Doorn
- Department of Medical Oncology, Erasmus MC Cancer Institute, Wytemaweg, Rotterdam, The Netherlands
| | - M A Phelps
- Division of Pharmaceutics and Pharmaceutical Chemistry, College of Pharmacy, Ohio State University, Columbus, Ohio, USA
| | - A A Gibson
- Division of Pharmaceutics and Pharmaceutical Chemistry, College of Pharmacy, Ohio State University, Columbus, Ohio, USA
| | - S Hu
- Division of Pharmaceutics and Pharmaceutical Chemistry, College of Pharmacy, Ohio State University, Columbus, Ohio, USA
| | - L Li
- Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - A Vasilyeva
- Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - G Du
- Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - P Hamberg
- Department of Internal Medicine, St. Franciscus Gasthuis, Rotterdam, The Netherlands
| | - Falm Eskens
- Department of Medical Oncology, Erasmus MC Cancer Institute, Wytemaweg, Rotterdam, The Netherlands
| | - P de Bruijn
- Department of Medical Oncology, Erasmus MC Cancer Institute, Wytemaweg, Rotterdam, The Netherlands
| | - A Sparreboom
- Department of Medical Oncology, Erasmus MC Cancer Institute, Wytemaweg, Rotterdam, The Netherlands.,Division of Pharmaceutics and Pharmaceutical Chemistry, College of Pharmacy, Ohio State University, Columbus, Ohio, USA
| | - Rhj Mathijssen
- Department of Medical Oncology, Erasmus MC Cancer Institute, Wytemaweg, Rotterdam, The Netherlands
| | - S D Baker
- Division of Pharmaceutics and Pharmaceutical Chemistry, College of Pharmacy, Ohio State University, Columbus, Ohio, USA
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Cao T, Zhang H, Zhou L, Wang Y, Du G, Yao H, Wang Y, Luo Q, Chen F, Wang W, Tang G. In vitrocell culture system optimization of keratinocytes from oral lichen planus (OLP) patients. Oral Dis 2016; 23:225-232. [PMID: 27763705 DOI: 10.1111/odi.12599] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 09/24/2016] [Accepted: 10/17/2016] [Indexed: 11/26/2022]
Affiliation(s)
- T Cao
- Department of Oral Medicine; Shanghai Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
- Department of Endodontics and Oral Medicine; Nantong Stomatological Hospital; Nantong China
| | - H Zhang
- Department of Clinical Immunology; Shanghai Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
| | - L Zhou
- Department of Oral Medicine; Shanghai Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
| | - Y Wang
- Department of Oral Medicine; Shanghai Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
| | - G Du
- Department of Oral Medicine; Shanghai Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
| | - H Yao
- Department of Oral Medicine; Shanghai Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
| | - Y Wang
- Department of Oral Medicine; Shanghai Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
| | - Q Luo
- Department of Clinical Immunology; Shanghai Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
| | - F Chen
- Department of Clinical Immunology; Shanghai Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
| | - W Wang
- Department of Periodontology and Oral Medicine; Qingdao Stomatological Hospital; Qingdao China
| | - G Tang
- Department of Oral Medicine; Shanghai Ninth People's Hospital; Shanghai Jiao Tong University School of Medicine; Shanghai China
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18
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Loisel DA, Du G, Ahluwalia TS, Tisler CJ, Evans MD, Myers RA, Gangnon RE, Kreiner-Møller E, Bønnelykke K, Bisgaard H, Jackson DJ, Lemanske RF, Nicolae DL, Gern JE, Ober C. Genetic associations with viral respiratory illnesses and asthma control in children. Clin Exp Allergy 2016; 46:112-24. [PMID: 26399222 DOI: 10.1111/cea.12642] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Revised: 08/04/2015] [Accepted: 08/23/2015] [Indexed: 02/07/2023]
Abstract
BACKGROUND Viral respiratory infections can cause acute wheezing illnesses in children and exacerbations of asthma. OBJECTIVE We sought to identify variation in genes with known antiviral and pro-inflammatory functions to identify specific associations with more severe viral respiratory illnesses and the risk of virus-induced exacerbations during the peak fall season. METHODS The associations between genetic variation at 326 SNPs in 63 candidate genes and 10 phenotypes related to viral respiratory infection and asthma control were examined in 226 children enrolled in the RhinoGen study. Replication of asthma control phenotypes was performed in 2128 children in the Copenhagen Prospective Study on Asthma in Childhood (COPSAC). Significant associations in RhinoGen were further validated using virus-induced wheezing illness and asthma phenotypes in an independent sample of 122 children enrolled in the Childhood Origins of Asthma (COAST) birth cohort study. RESULTS A significant excess of P values smaller than 0.05 was observed in the analysis of the 10 RhinoGen phenotypes. Polymorphisms in 12 genes were significantly associated with variation in the four phenotypes showing a significant enrichment of small P values. Six of those genes (STAT4, JAK2, MX1, VDR, DDX58, and EIF2AK2) also showed significant associations with asthma exacerbations in the COPSAC study or with asthma or virus-induced wheezing phenotypes in the COAST study. CONCLUSIONS We identified genetic factors contributing to individual differences in childhood viral respiratory illnesses and virus-induced exacerbations of asthma. Defining mechanisms of these associations may provide insight into the pathogenesis of viral respiratory infections and virus-induced exacerbations of asthma.
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Affiliation(s)
- D A Loisel
- Department of Human Genetics, University of Chicago, Chicago, IL, USA.,Department of Biology, Saint Michael's College, Colchester, VT, USA
| | - G Du
- Department of Human Genetics, University of Chicago, Chicago, IL, USA
| | - T S Ahluwalia
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Ledreborg Allé 34, DK-2820, Copenhagen, Denmark.,Steno Diabetes Center, Gentofte, Denmark
| | - C J Tisler
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - M D Evans
- Department of Biostatistics and Medical Informatics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - R A Myers
- Department of Human Genetics, University of Chicago, Chicago, IL, USA
| | - R E Gangnon
- Department of Biostatistics and Medical Informatics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.,Department of Population Health Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - E Kreiner-Møller
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Ledreborg Allé 34, DK-2820, Copenhagen, Denmark
| | - K Bønnelykke
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Ledreborg Allé 34, DK-2820, Copenhagen, Denmark
| | - H Bisgaard
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Ledreborg Allé 34, DK-2820, Copenhagen, Denmark
| | - D J Jackson
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - R F Lemanske
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA.,Department of Medicine, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - D L Nicolae
- Department of Human Genetics, University of Chicago, Chicago, IL, USA.,Department of Medicine, University of Chicago, Chicago, IL, USA.,Department of Statistics, University of Chicago, Chicago, IL, USA
| | - J E Gern
- Department of Pediatrics, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - C Ober
- Department of Human Genetics, University of Chicago, Chicago, IL, USA
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20
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Sterling N, Lewis M, Du G, Huang X. Structural Imaging and Parkinson's Disease: Moving Toward Quantitative Markers of Disease Progression. J Parkinsons Dis 2016; 6:557-67. [PMID: 27258697 PMCID: PMC5008231 DOI: 10.3233/jpd-160824] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Accepted: 04/27/2016] [Indexed: 12/16/2022]
Abstract
Parkinson's disease (PD) is a progressive age-related neurodegenerative disorder. Although the pathological hallmark of PD is dopaminergic cell death in the substantia nigra pars compacta, widespread neurodegenerative changes occur throughout the brain as disease progresses. Postmortem studies, for example, have demonstrated the presence of Lewy pathology, apoptosis, and loss of neurotransmitters and interneurons in both cortical and subcortical regions of PD patients. Many in vivo structural imaging studies have attempted to gauge PD-related pathology, particularly in gray matter, with the hope of identifying an imaging biomarker. Reports of brain atrophy in PD, however, have been inconsistent, most likely due to differences in the studied populations (i.e. different disease stages and/or clinical subtypes), experimental designs (i.e. cross-sectional vs. longitudinal), and image analysis methodologies (i.e. automatic vs. manual segmentation). This review attempts to summarize the current state of gray matter structural imaging research in PD in relationship to disease progression, reconciling some of the differences in reported results, and to identify challenges and future avenues.
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Affiliation(s)
- N.W. Sterling
- Department of Neurology, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey, PA, USA
| | - M.M. Lewis
- Department of Neurology, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey, PA, USA
- Department of Pharmacology, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey, PA, USA
| | - G. Du
- Department of Neurology, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey, PA, USA
| | - X. Huang
- Department of Neurology, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey, PA, USA
- Department of Pharmacology, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey, PA, USA
- Department of Radiology, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey, PA, USA
- Department of Neurosurgery, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey, PA, USA
- Department of Kinesiology, Pennsylvania State University-Milton S. Hershey Medical Center, Hershey, PA, USA
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Pang H, Shi A, Li M, Xue W, Li Y, Cao G, Yan B, Dong F, Xiao W, He G, Du G, Hu X, Cheng G. Simultaneous Determination of Baicalein and Baicalin in Human Plasma by High Performance Liquid Chromatograph-Tandem Spectrometry and its Application in a Food-Effect Pharmacokinetic Study. Drug Res (Stuttg) 2016; 66:394-401. [PMID: 27022718 DOI: 10.1055/s-0035-1569446] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- H. Pang
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang (P.R. China)
| | - A. Shi
- Beijing Key Laboratory of Drug Clinical Risk and Personalized Medication Evaluation, Department of Pharmacy, Beijing Hospital, Beijing (P.R. China)
| | - M. Li
- Beijing Key Laboratory of Drug Clinical Risk and Personalized Medication Evaluation, Department of Pharmacy, Beijing Hospital, Beijing (P.R. China)
| | - W. Xue
- Beijing Key Laboratory of Drug Clinical Risk and Personalized Medication Evaluation, Department of Pharmacy, Beijing Hospital, Beijing (P.R. China)
| | - Y. Li
- Beijing Key Laboratory of Drug Clinical Risk and Personalized Medication Evaluation, Department of Pharmacy, Beijing Hospital, Beijing (P.R. China)
| | - G. Cao
- Beijing Key Laboratory of Drug Clinical Risk and Personalized Medication Evaluation, Department of Pharmacy, Beijing Hospital, Beijing (P.R. China)
| | - B. Yan
- Beijing Key Laboratory of Drug Clinical Risk and Personalized Medication Evaluation, Department of Pharmacy, Beijing Hospital, Beijing (P.R. China)
| | - F. Dong
- Beijing Key Laboratory of Drug Clinical Risk and Personalized Medication Evaluation, Department of Pharmacy, Beijing Hospital, Beijing (P.R. China)
| | - W. Xiao
- StateKey Laboratory of New-tech for Chinese Medicine Pharmaceutical Process, Jiangsu Kanion Pharmaceutical CO.LTD, Lianyungang, Jiangsu (P.R. China)
| | - G. He
- Beijing Key Laboratory of Drug Targets Identification and Drug Screening, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing (P.R. China)
| | - G. Du
- Beijing Key Laboratory of Drug Targets Identification and Drug Screening, Institute of Materia Medica, Chinese Academy of Medical Science and Peking Union Medical College, Beijing (P.R. China)
| | - X. Hu
- Beijing Key Laboratory of Drug Clinical Risk and Personalized Medication Evaluation, Department of Pharmacy, Beijing Hospital, Beijing (P.R. China)
| | - G. Cheng
- School of Pharmacy, Shenyang Pharmaceutical University, Shenyang (P.R. China)
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Li S, Niu G, Wu Y, Du G, Huang C, Yin X, Liu Z, Song C, Leng H. Vitamin D prevents articular cartilage erosion by regulating collagen II turnover through TGF-β1 in ovariectomized rats. Osteoarthritis Cartilage 2016; 24:345-53. [PMID: 26343586 DOI: 10.1016/j.joca.2015.08.013] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Revised: 08/13/2015] [Accepted: 08/24/2015] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To explore the effect of vitamin D on turnover of articular cartilage with ovariectomy (OVX) induced OA, and to investigate transforming growth factor-β1 (TGF-β1) as a possible underlying mechanism mediated by 1α,25(OH)2D3. DESIGN Sixty-six rats were randomly allocated into seven groups: sham plus control diet (SHAM+CTL), OVX+CTL diet, sham plus vitamin D-deficient (VDD) diet, OVX+VDD diet, and three groups of ovariectomized rats treated with different doses of 1α,25(OH)2D3. The cartilage erosion and the levels of serum 17β-estradiol, 1α,25(OH)2D3 and C-telopeptide of type II collagen (CTX-II) were measured. TGF-β1, type II Collagen (CII), matrix metalloproteinases (MMP)-9,-13 in articular cartilage were assessed by immunohistochemistry. TGF-β1 and CTX-II expression were measured in articular cartilage chondrocytes treated with/without tumor necrosis factor (TNF-α), 1α,25(OH)2D3, and TGF-β receptor inhibitor (SB505124) in vitro. RESULTS Cartilage erosion due to OVX was significantly reduced in a dose-dependent manner by 1α,25(OH)2D3 supplementation, and exacerbated by VDD. The expressions of TGF-β1 and CII in articular cartilage were suppressed by OVX and VDD, and rescued by 1α,25(OH)2D3 supplementation. The expression of MMP-9,-13 in articular cartilage increased with OVX and VDD, and decreased with 1α,25(OH)2D3 supplementation. In vitro experiments showed that 1α,25(OH)2D3 increased the TGF-β1 expression of TNF-α stimulated chondrocytes in a dose-dependent manner. 1α,25(OH)2D3 significantly counteracted the increased CTX-II release due to TNF-α stimulation, and this effect was significantly suppressed by SB505124. CONCLUSION VDD aggravated cartilage erosion, and 1α,25(OH)2D3 supplementation showed protective effects in OVX-induced OA partly through the TGF-β1 pathway.
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Affiliation(s)
- S Li
- Department of Orthopaedics, Peking University Third Hospital, Beijing 100191, China.
| | - G Niu
- Beijing Key Lab of Spine Diseases, Beijing 100191, China.
| | - Y Wu
- 2nd Dental Center, Peking University School and Hospital of Stomatology, Beijing 100101, China.
| | - G Du
- Department of Orthopaedics, Peking University Third Hospital, Beijing 100191, China.
| | - C Huang
- Medical Central Lab, Peking University Third Hospital, Beijing 100191, China.
| | - X Yin
- Beijing Key Lab of Spine Diseases, Beijing 100191, China.
| | - Z Liu
- Department of Orthopaedics, Peking University Third Hospital, Beijing 100191, China.
| | - C Song
- Beijing Key Lab of Spine Diseases, Beijing 100191, China.
| | - H Leng
- Department of Orthopaedics, Peking University Third Hospital, Beijing 100191, China.
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Bouzigon E, Nadif R, Thompson EE, Concas MP, Kuldanek S, Du G, Brossard M, Lavielle N, Sarnowski C, Vaysse A, Dessen P, van der Valk RJP, Duijts L, Henderson AJ, Jaddoe VWV, de Jongste JC, Casula S, Biino G, Dizier MH, Pin I, Matran R, Lathrop M, Pirastu M, Demenais F, Ober C. A common variant in RAB27A gene is associated with fractional exhaled nitric oxide levels in adults. Clin Exp Allergy 2015; 45:797-806. [PMID: 25431337 DOI: 10.1111/cea.12461] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 10/06/2014] [Accepted: 11/19/2014] [Indexed: 12/28/2022]
Abstract
BACKGROUND Exhaled nitric oxide (FeNO) is a biomarker for eosinophilic inflammation in the airways and for responsiveness to corticosteroids in asthmatics. OBJECTIVE We sought to identify in adults the genetic determinants of fractional exhaled nitric oxide (FeNO) levels and to assess whether environmental and disease-related factors influence these associations. METHODS We performed a genome-wide association study of FeNO through meta-analysis of two independent discovery samples of European ancestry: the outbred EGEA study (French Epidemiological study on the Genetics and Environment of Asthma, N = 610 adults) and the Hutterites (N = 601 adults), a founder population living on communal farms. Replication of main findings was assessed in adults from an isolated village in Sardinia (Talana study, N = 450). We then investigated the influence of asthma, atopy and tobacco smoke exposure on these genetic associations, and whether they were also associated with FeNO values in children of the EAGLE (EArly Genetics & Lifecourse Epidemiology, N = 8858) consortium. RESULTS We detected a common variant in RAB27A (rs2444043) associated with FeNO that reached the genome-wide significant level (P = 1.6 × 10(-7) ) in the combined discovery and replication adult data sets. This SNP belongs to member of RAS oncogene family (RAB27A) and was associated with an expression quantitative trait locus for RAB27A in lymphoblastoid cell lines from asthmatics. A second suggestive locus (rs2194437, P = 8.9 × 10(-7) ) located nearby the sodium/calcium exchanger 1 (SLC8A1) was mainly detected in atopic subjects and influenced by inhaled corticosteroid use. These two loci were not associated with childhood FeNO values. CONCLUSIONS AND CLINICAL RELEVANCE This study identified a common variant located in RAB27A gene influencing FeNO levels specifically in adults and with a biological relevance to the regulation of FeNO levels. This study provides new insight into the biological mechanisms underlying FeNO levels in adults.
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Affiliation(s)
- E Bouzigon
- Inserm, UMR-946, Paris, France; Univ Paris Diderot, Sorbonne Paris Cité, Institut Universitaire d'Hématologie, Paris, France
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Li J, Ye L, Zhao H, Du G, Cheng S, Yang X, Yu H, Teng X, Si Y, Zhang Z, Jiang W. 2187 Reduced NOV expression is correlated with disease progression of colorectal cancer and its implications in survival and invasion of cancer cells. Eur J Cancer 2015. [DOI: 10.1016/s0959-8049(16)31106-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Qi W, Zhou X, Ma M, Knops JMH, Li W, Du G. Elevation, moisture and shade drive the functional and phylogenetic meadow communities’ assembly in the northeastern Tibetan Plateau. COMMUNITY ECOL 2015. [DOI: 10.1556/168.2015.16.1.8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Jin B, Wang W, Du G, Huang GZ, Han LT, Tang ZY, Fan DG, Li J, Zhang SZ. Identifying hub genes and dysregulated pathways in hepatocellular carcinoma. Eur Rev Med Pharmacol Sci 2015; 19:592-601. [PMID: 25753876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE The aim of this study was to identify the hub genes and dysregulated pathways of hepatocellular carcinoma (HCC) and explore the molecular mechanism of the biological process associated with HCC. MATERIALS AND METHODS Microarray data were got from NCBI Gene Expression Omnibus (GEO) database. The most significant top 100 up-regulated gene signatures and top 100 down-regulated gene signatures were identified by integrated analysis of the multiple microarray datasets using a novel model genome-wide relative significance (GWRS) and genome-wide global significance (GWGS). Gene Ontology (GO) enrichment analysis and pathway analysis of those genes were performed based on Gene Ontology website and Kyoto Encyclopedia of Genes and Genomes (KEGG). Protein-protein interaction (PPI) network was constructed using Cytoscape 2.1. In addition, we analysed the significantly dysregulated signaling pathways across the PPI network and KEGG pathway analysis. RESULTS We screened 2920 up-regulated and 2231 down-regulated gene signatures across multiple studies by GWRS and GWGS. The top 100 up-regulated and top 100 down-regulated gene signatures were selected for further research. GO enrichment analysis showed that these genes significantly enriched in terms of mitosis (p = 5.83×10-20), nuclear division (p = 5.83×10-20) and M phase of mitotic cell cycle (p = 9.39×10-20). The most significant terms of KEGG pathway included cell cycle (p = 1.33×10-8), oocyte meiosis (p = 1.41×10-4), drug metabolism (p = 2.15×10-4) and p53 signaling pathway (p = 3.57×10-4). PPI network suggested that BIRC5, CDC20, CCNB1, BUB1B, MAD2L1 and CDK1 were important significant genes which were considered as hub genes. Across the PPI and pathway, cell cycle, oocyte meiosis and p53 signaling pathway were the significantly dysregulated pathways. CONCLUSIONS Our study displayed robust gene signatures in HCC. It showed that the dysregulations of cell cycle, oocyte meiosis, p53 signaling pathway and progesterone-mediated oocyte maturation pathway were closely associated to the development and progression of HCC. Besides, genes BIRC5, CDC20, CCNB1, BUB1B, MAD2L1 and CDK1 as the hub genes might play important roles for diagnosing and therapy of HCC.
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Affiliation(s)
- B Jin
- The Department of General Surgery, Qilu Hospital of Shandong University, Jinan, China.
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Dang X, Guan L, Hu W, Du G, Li J. S100B ranks as a new marker of multiple traumas in patients and may accelerate its development by regulating endothelial cell dysfunction. Int J Clin Exp Pathol 2014; 7:3818-3826. [PMID: 25120758 PMCID: PMC4128993] [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] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Accepted: 06/24/2014] [Indexed: 06/03/2023]
Abstract
S100 calcium binding protein B (S100B) is recently known as the markers for inflammatory diseases. However, its roles and underlying mechanism on multiple-traumas remain unclearly. In this study, total 123 patients (87 male and 36 female) were enrolled and divided into two group: Injury severity score (ISS) ≥ 16 (n = 69); ISS < 16 (n = 54). ELISA assay confirmed that the circulating S100B levels in multi-trauma were obviously higher than that in healthy volunteers. Additionally, S100B concentrations was associated with injury severity as an obviously higher levels of S100B (2.18 μg/L) in severe trauma group (ISS ≥ 16) than 1.26 μg/L in moderate trauma group (ISS < 16). Furthermore, the average concentration of S100B was 2.91 μg/L (n = 14) in fatal patients and 2.21 μg/L in survivors, suggesting an obvious correlation between S100B and the severity degree of multi-injury. Further analysis confirmed an obvious correlation between S100B levels and sE-selectin, and Von willebrand factor (vWF), both of these are the marker of endothelial cell injury. After transfection with pcDNA3.1-S100B, human umbilical vein endothelial cells (HUVECs) cell apoptotic ratio was dramatically up-regulated, concomitant with the increase in IL-6 and IL-8 levels, suggesting that S100B might regulate the development of polytrauma by mediating endothelial cell dysfunction. Together, these results suggest a potential predictive value of S100B and its underlying mechanism in the pathological process of polytrauma. Therefore, this study will support the potential clinical aspect for the diagnostic and treatment of polytrauma and its complications.
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Liu Z, Wang W, Jin B, Li G, Du G, Zhang Z, Han L, Huang G, Tang Z. Protection Against Ischemia-Reperfusion Injury in Aged Liver Donor by the Induction of Exogenous Human Telomerase Reverse Transcriptase Gene. Transplant Proc 2014; 46:1567-72. [DOI: 10.1016/j.transproceed.2013.12.071] [Citation(s) in RCA: 6] [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] [Received: 04/25/2013] [Revised: 10/29/2013] [Accepted: 12/16/2013] [Indexed: 01/08/2023]
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Zhang J, Ye L, Wang W, Du G, Yu X, Zhu X, Dong Q, Cen X, Guan X, Fu F, Tian J. A 12-week subchronic intramuscular toxicity study of risperidone-loaded microspheres in rats. Hum Exp Toxicol 2014; 34:205-23. [PMID: 24812153 DOI: 10.1177/0960327114532380] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Long-acting injectable formulations of antipsychotics have been an important treatment option to increase the compliance of the patient with schizophrenia by monitoring drug administration and identifying medication noncompliance and to improve the long-term management of schizophrenia. Risperidone, a serotoninergic 5-HT2 and dopaminergic D2 receptor antagonist, was developed to be a long-acting sustained-release formulation for the treatment of schizophrenia. In this study, 12-week subchronic toxicity study of risperidone-loaded microspheres (RMs) in rats by intramuscular injection with an 8-week recovery phase was carried out to investigate the potential subchronic toxicity of a novel long-acting sustained-release formulation. The results indicated that the dosage of 10-90 mg/kg of RM for 2 weeks did not cause treatment-related mortality. The main drug-related findings were contributed to the dopamine D2 receptor and α1-adrenoceptor antagonism of risperidone such as elevation of serum and pituitary prolactin levels and ptosis and changes in reproductive system (uterus, ovary, vagina, mammary gland, testis, seminal vesicle, epididymis, and prostate). In addition, foreign body granuloma in muscle at injection sites caused by poly-lactide-co-glycolide was observed. At the end of the recovery phase, these changes mostly returned to normal. The results indicated that RM had a good safety profile in rats.
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Affiliation(s)
- J Zhang
- School of Pharmacy, Yantai University and State Key Laboratory of Long-acting and Targeting Drug Delivery Technologies, Yantai, Shandong, People's Republic of China
| | - L Ye
- School of Pharmacy, Yantai University and State Key Laboratory of Long-acting and Targeting Drug Delivery Technologies, Yantai, Shandong, People's Republic of China
| | - W Wang
- School of Pharmacy, Yantai University and State Key Laboratory of Long-acting and Targeting Drug Delivery Technologies, Yantai, Shandong, People's Republic of China
| | - G Du
- School of Pharmacy, Yantai University and State Key Laboratory of Long-acting and Targeting Drug Delivery Technologies, Yantai, Shandong, People's Republic of China
| | - X Yu
- School of Pharmacy, Yantai University and State Key Laboratory of Long-acting and Targeting Drug Delivery Technologies, Yantai, Shandong, People's Republic of China
| | - X Zhu
- School of Pharmacy, Yantai University and State Key Laboratory of Long-acting and Targeting Drug Delivery Technologies, Yantai, Shandong, People's Republic of China
| | - Q Dong
- School of Pharmacy, Yantai University and State Key Laboratory of Long-acting and Targeting Drug Delivery Technologies, Yantai, Shandong, People's Republic of China
| | - X Cen
- WestChina-Frontier PharmaTech Co. (WCFP) and National Chengdu Center for Safety Evaluation of Drugs (NCCSED), Chengdu, Sichuan, People's Republic of China
| | - X Guan
- WestChina-Frontier PharmaTech Co. (WCFP) and National Chengdu Center for Safety Evaluation of Drugs (NCCSED), Chengdu, Sichuan, People's Republic of China
| | - F Fu
- School of Pharmacy, Yantai University and State Key Laboratory of Long-acting and Targeting Drug Delivery Technologies, Yantai, Shandong, People's Republic of China
| | - J Tian
- School of Pharmacy, Yantai University and State Key Laboratory of Long-acting and Targeting Drug Delivery Technologies, Yantai, Shandong, People's Republic of China
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Qin Y, Ji J, Du G, Wu W, Dai J, Hu Z, Sha J, Hang B, Lu C, Xia Y, Wang X. Comprehensive pathway-based analysis identifies associations of BCL2, GNAO1 and CHD2 with non-obstructive azoospermia risk. Hum Reprod 2014; 29:860-6. [DOI: 10.1093/humrep/deu013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Song YL, Jing WH, Du G, Yang FQ, Yan R, Wang YT. Qualitative analysis and enantiospecific determination of angular-type pyranocoumarins in Peucedani Radix using achiral and chiral liquid chromatography coupled with tandem mass spectrometry. J Chromatogr A 2014; 1338:24-37. [PMID: 24630501 DOI: 10.1016/j.chroma.2014.01.078] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2013] [Revised: 01/30/2014] [Accepted: 01/31/2014] [Indexed: 10/25/2022]
Abstract
Angular-type pyranocoumarins (APs), the derivatives of khellactone, are widely documented as the main active constituents in Peucedani Radix (Chinese name: Qian-hu). Owing to the natural occurrence of chiral centers, enantiomers of APs are extensively distributed in the original plant, and enantioselective performances have been definitely demonstrated for these enantiomers. In current study, the chemical characterization of the major and minor APs in Peucedani Radix was performed using ultra high performance liquid chromatography coupled with diode array detector and hybrid ion trap-orbitrap mass spectrometry. On the other hand, a heart-cut two-dimensional achiral-chiral liquid chromatography combining triple quadropole-linear ion trap mass spectrometry system (2D LC-MS/MS) was developed for simultaneous enantiospecific quantification of eighteen coumarins, including seven pairs of enantiomers. Eleven APs (1-11) were recruited to propose UV absorption characteristics and electrospray ionization fragmentation patterns of APs. A total of 42 components were categorized into APs based on their UV spectral properties and identified according to the proposed mass fragmentation pathways, while two linear-type furanocoumarins (12-13) were unambiguously assigned by further purification. A Capcell core RP-C18 column was employed in the primary LC dimension to achieve efficient racemic separation for the main chemical constituents (1-9 and 12-13) in Peucedani Radix, while a Chiralpak AD-RH column was utilized in the secondary dimension to contribute enantioselective separation for seven enantiomerically enriched components (1, 3 and 5-9). Collectively, the results provided the chemical evidences for revealing the material basis of the therapeutic effects of Peucedani Radix, and the developed 2D LC-MS/MS system in the present study is expected to be an ideal tool for the quality control of Peucedani Radix as well as a reliable technique for complex matrices containing both achiral and chiral components.
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Affiliation(s)
- Y L Song
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - W H Jing
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - G Du
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - F Q Yang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing, China
| | - R Yan
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Y T Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China.
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Liu W, Wu R, Du G. Single-port laparoscopic extraperitoneal repair of pediatric inguinal hernias and hydroceles by using modified Kirschner pin: a novel technique. Hernia 2013; 18:345-9. [PMID: 24218078 DOI: 10.1007/s10029-013-1181-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2013] [Accepted: 10/31/2013] [Indexed: 11/26/2022]
Abstract
BACKGROUND The development of laparoscopic processus vaginalis repair has provided an alternative approach to the management of inguinal hernia and hydroceles in children. Here we describe our new technique for laparoscopic extraperitoneal ligation of processus vaginalis with subumbilical single-port using a modified Kirschner pin. METHODS A 5-mm trocar for an operative laparoscope was placed through an infraumbilical incision. A Kirschner pin with a hole in one flat terminal was inserted at the point of the internal inguinal ring. The processus vaginalis was closed extracorporeally by a non-absorbable suture, which was introduced into the abdomen through the Kirschner pin performing dissection within the extraperitoneal space in a series of movements. When a contralateral patent processus vaginalis is present, laparoscopic-assisted extracorporeal ligation is performed during the same operation. RESULTS Between September 2010 and September 2012, 211 children (130 cases of inguinal hernia and 81 cases of hydrocele) underwent processus vaginalis repair using this novel technique. A contralateral patent processus vaginalis was present and thus simultaneously closed in 20 patients with unilateral inguinal hernias and 12 patients with unilateral hydroceles. The mean operative time was 18 min (8-35 min). The mean follow-up period is 12 months (range 5-24 months), and no recurrence and complications has been observed to date. CONCLUSIONS This article describes a unique technique of extracorporeal circuit ligation of processus vaginalis using a minimally invasive technique as afforded by a reused modified Kirschner pin. Single-port laparoscopic processus vaginalis repair using this instrument is feasible and seems to be safe.
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Affiliation(s)
- W Liu
- Department of Pediatric Surgery, Provincial Hospital Affiliated to Shandong University, Jinan, 250021, China
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Tian J, Wang W, Ye L, Cen X, Guan X, Zhang J, Yu P, Du G, Liu W, Li Y. A 12-week intramuscular toxicity study of risperidone-loaded microspheres in Beagle dogs. Hum Exp Toxicol 2013; 33:473-87. [DOI: 10.1177/0960327113499045] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Long-acting formulations of antipsychotics are important treatment options to increase the compliance of schizophrenic patients. Risperidone, a 5-HT2 and dopaminergic D2 receptor antagonist, was developed as long-acting sustained-release microspheres with poly(lactide-co-glycolide) (PLGA) as a drug carrier for the treatment of schizophrenia. In the present study, the main objective is to determine the nonclinical safety profile of risperidone-loaded microspheres (RM) in Beagle dogs after intramuscular administration for 3 months, once in 2 weeks, followed by 8-week recovery phase. No animal death was found and no special toxicological findings were observed. The findings, such as hypoactivity, ptosis, increased heart rate, and elevated serum and pituitary prolactin levels, were observed and related to the pharmacological effects of risperidone. The changes in the reproductive system (uterus, ovary, vagina, cervix, and mammary gland) were considered secondary to the prolactin elevation, and the congestion of spleen was related to risperidone. The foreign body granulomas at injection sites might be caused by PLGA. At the end of recovery phase, the above changes mostly recovered to normal, and on administering 3 mg/kg dose level once in 2 weeks on Beagle dogs showed no observed adverse effect. Taken together, RM had exhibited the acceptable safety.
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Affiliation(s)
- J Tian
- School of Pharmacy, Yantai University, Yantai, Shandong, People's Republic of China
| | - W Wang
- School of Pharmacy, Yantai University, Yantai, Shandong, People's Republic of China
| | - L Ye
- Research & Development Center, Luye Pharma Group Ltd., Yantai, Shandong, People's Republic of China
| | - X Cen
- WestChina-Frontier PharmaTech Co. (WCFP) and National Chengdu Center for Safety Evaluation of Drugs (NCCSED), Chengdu, Sichuan, People’s Republic of China
| | - X Guan
- WestChina-Frontier PharmaTech Co. (WCFP) and National Chengdu Center for Safety Evaluation of Drugs (NCCSED), Chengdu, Sichuan, People’s Republic of China
| | - J Zhang
- Research & Development Center, Luye Pharma Group Ltd., Yantai, Shandong, People's Republic of China
| | - P Yu
- Research & Development Center, Luye Pharma Group Ltd., Yantai, Shandong, People's Republic of China
| | - G Du
- School of Pharmacy, Yantai University, Yantai, Shandong, People's Republic of China
| | - W Liu
- School of Pharmacy, Yantai University, Yantai, Shandong, People's Republic of China
| | - Y Li
- Research & Development Center, Luye Pharma Group Ltd., Yantai, Shandong, People's Republic of China
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Liu J, Zhu Y, Du G, Zhou J, Chen J. Exogenous ergosterol protects Saccharomyces cerevisiae
from d
-limonene stress. J Appl Microbiol 2012; 114:482-91. [DOI: 10.1111/jam.12046] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2012] [Revised: 09/17/2012] [Accepted: 10/17/2012] [Indexed: 01/22/2023]
Affiliation(s)
- J. Liu
- Key Laboratory of Industrial Biotechnology; Ministry of Education and School of Biotechnology, Jiangnan University; Wuxi Jiangsu China
| | - Y. Zhu
- Key Laboratory of Industrial Biotechnology; Ministry of Education and School of Biotechnology, Jiangnan University; Wuxi Jiangsu China
| | - G. Du
- Key Laboratory of Industrial Biotechnology; Ministry of Education and School of Biotechnology, Jiangnan University; Wuxi Jiangsu China
- State Key Laboratory of Food Science and Technology; Jiangnan University; Wuxi Jiangsu China
| | - J. Zhou
- Key Laboratory of Industrial Biotechnology; Ministry of Education and School of Biotechnology, Jiangnan University; Wuxi Jiangsu China
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology; Ministry of Education, Jiangnan University; Wuxi Jiangsu China
| | - J. Chen
- Key Laboratory of Industrial Biotechnology; Ministry of Education and School of Biotechnology, Jiangnan University; Wuxi Jiangsu China
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology; Ministry of Education, Jiangnan University; Wuxi Jiangsu China
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Sprowl J, Lin W, Du G, Ness R, Baker S, Chen T, Sparreboom A. 146 Identification of Tyrosine Kinase Inhibitors as Modulators of OCT2 Function. Eur J Cancer 2012. [DOI: 10.1016/s0959-8049(12)71944-5] [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: 10/27/2022]
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Du G, Shi Z, Xia D, Wei X, Zhang L, Parvizi N, Zhao R. Cysteamine improves growth performance and gastric ghrelin expression in preweaning piglets. Domest Anim Endocrinol 2012; 42:203-9. [PMID: 22236828 DOI: 10.1016/j.domaniend.2011.12.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Revised: 12/08/2011] [Accepted: 12/09/2011] [Indexed: 01/08/2023]
Abstract
The aim of the present study was to investigate the effect of cysteamine on growth performance of preweaning piglets and gastric expression of ghrelin mRNA in vivo and in vitro. Twelve litters of newborn piglets were allocated randomly to control and treatment groups. From 15 d of age, piglets in the control group were fed basal creep diet, whereas the treatment group received basal diet supplemented with 120 mg cysteamine per kg of diet until weaning on 35 d of age. Body weight gain, creep feed consumption, and diarrhea rates were recorded, and gastric mucosal tissues were collected for quantifying mRNA expression. To evaluate the direct effect of cysteamine on gastric ghrelin expression, primary cultures of gastric mucosal cells isolated from 35-d-old piglets were exposed to cysteamine for 20 h at 0, 1, 10, and 100 μg/mL, respectively. Dietary cysteamine increased (P < 0.05) average daily creep feed consumption and BW gain in preweaning pigs, which was accompanied by reduction in diarrhea rates. At 35 d of age, piglets treated with cysteamine showed increased (P < 0.05) ghrelin and gastrin and decreased (P < 0.05) somatostatin mRNA expression in gastric mucosa. Moreover, dietary cysteamine treatment increased serum concentration of gastrin (P < 0.05). In vitro, cysteamine significantly increased ghrelin mRNA expression in gastric mucosal cells at the concentration of 10 μg/mL. In conclusion, dietary cysteamine is effective in improving the growth performance and health condition of preweaning piglets, which is associated with its stimulatory effects on gastric ghrelin mRNA expression both in vivo and in vitro.
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Affiliation(s)
- G Du
- Key Laboratory of Animal Physiology and Biochemistry, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, P R China
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Du G, Lewis M, Sen S, Shaffer M, Styner M, Wang J, Yang Q, Huang X. Different Clinical Implications of Substantia Nigra R2* and Diffusion Tenser Imaging Changes in Parkinson's Disease (P03.121). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p03.121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Zlobinskaya O, Dollinger G, Michalski D, Hable V, Greubel C, Du G, Multhoff G, Röper B, Molls M, Schmid TE. Induction and repair of DNA double-strand breaks assessed by gamma-H2AX foci after irradiation with pulsed or continuous proton beams. Radiat Environ Biophys 2012; 51:23-32. [PMID: 22228542 DOI: 10.1007/s00411-011-0398-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Accepted: 12/10/2011] [Indexed: 05/25/2023]
Abstract
In particle tumor therapy including beam scanning at accelerators, the dose per voxel is delivered within about 100 ms. In contrast, the new technology of laser plasma acceleration will produce ultimately shorter particle packages that deliver the dose within a nanosecond. Here, possible differences for relative biological effectiveness in creating DNA double-strand breaks in pulsed or continuous irradiation mode are studied. HeLa cells were irradiated with 1 or 5 Gy of 20-MeV protons at the Munich tandem accelerator, either at continuous mode (100 ms), or applying a single pulse of 1-ns duration. Cells were fixed 1 h after 1-Gy irradiation and 24 h after 5-Gy irradiation, respectively. A dose-effect curve based on five doses of X-rays was taken as reference. The total number of phosphorylated histone H2AX (gamma-H2AX) foci per cell was determined using a custom-made software macro for gamma-H2AX foci counting. For 1 h after 1-Gy 20-MeV proton exposures, values for the relative biological effectiveness (RBE) of 0.97 ± 0.19 for pulsed and 1.13 ± 0.21 for continuous irradiations were obtained in the first experiment 1.13 ± 0.09 and 1.16 ± 0.09 in the second experiment. After 5 Gy and 24 h, RBE values of 0.99 ± 0.29 and 0.91 ± 0.23 were calculated, respectively. Based on the gamma-H2AX foci numbers obtained, no significant differences in RBE between pulsed and continuous proton irradiation in HeLa cells were detected. These results are well in line with our data on micronucleus induction in HeLa cells.
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Affiliation(s)
- O Zlobinskaya
- Klinikum rechts der Isar, Department of Radiation Oncology, Technische Universität Muenchen, Ismaninger Strasse 22, 81675, Munich, Germany.
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Lewis MM, Du G, Sen S, Kawaguchi A, Truong Y, Lee S, Mailman RB, Huang X. Differential involvement of striato- and cerebello-thalamo-cortical pathways in tremor- and akinetic/rigid-predominant Parkinson's disease. Neuroscience 2011; 177:230-9. [PMID: 21211551 DOI: 10.1016/j.neuroscience.2010.12.060] [Citation(s) in RCA: 110] [Impact Index Per Article: 8.5] [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] [Received: 09/24/2010] [Revised: 11/22/2010] [Accepted: 12/29/2010] [Indexed: 12/20/2022]
Abstract
Parkinson's disease (PD) presents clinically with varying degrees of resting tremor, rigidity, and bradykinesia. For decades, striatal-thalamo-cortical (STC) dysfunction has been implied in bradykinesia and rigidity, but does not explain resting tremor in PD. To understand the roles of cerebello-thalamo-cortical (CTC) and STC circuits in the pathophysiology of the heterogeneous clinical presentation of PD, we collected functional magnetic resonance imaging (fMRI) data from 17 right-handed PD patients [nine tremor predominant (PDT) and eight akinetic-rigidity predominant (PDAR)] and 14 right-handed controls while they performed internally-guided (IG) sequential finger tapping tasks. The percentage of voxels activated in regions constituting the STC and CTC [divided as cerebellar hemisphere-thalamo-cortical (CHTC) and vermis-thalamo-cortical (CVTC)] circuits was calculated. Multivariate analysis of variance compared the activation patterns of these circuits between study groups. Compared to controls, both PDAR and PDT subjects displayed an overall increase in the percentage of voxels activated in both STC and CTC circuits. These increases reached statistical significance in contralateral STC and CTC circuits for PDT subjects, and in contralateral CTC pathways for PDAR subjects. Comparison of PDAR and PDT subjects revealed significant differences in ipsilateral STC (P=0.005) and CTC (P=0.043 for CHTC and P=0.003 for CVTC) circuits. These data support the differential involvement of STC and CTC circuits in PD subtypes, and help explain the heterogeneous presentation of PD symptoms. These findings underscore the importance of integrating CTC circuits in understanding PD and other disorders of the basal ganglia.
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Affiliation(s)
- M M Lewis
- Department of Neurology, Pennsylvania State University, Milton S. Hershey Medical Center, Hershey, PA 17033, USA
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Baroody F, Sharma S, Vasnani R, deTineo M, Du G, Pinto J, Naclerio R. Recruitment Factors Which Affect the Outcome of a Seasonal Allergic Rhinitis Trial. J Allergy Clin Immunol 2010. [DOI: 10.1016/j.jaci.2009.12.403] [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: 10/19/2022]
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Du G, Zhao H, Zhang Q, Li G, Yang F, Wang Y, Li Y, Wang Y. A rapid method for simultaneous determination of 14 phenolic compounds in Radix Puerariae using microwave-assisted extraction and ultra high performance liquid chromatography coupled with diode array detection and time-of-flight mass spectrometry. J Chromatogr A 2010; 1217:705-14. [DOI: 10.1016/j.chroma.2009.12.017] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2009] [Revised: 11/19/2009] [Accepted: 12/02/2009] [Indexed: 10/20/2022]
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Tondi G, Zhao W, Pizzi A, Du G, Fierro V, Celzard A. Tannin-based rigid foams: a survey of chemical and physical properties. Bioresour Technol 2009; 100:5162-5169. [PMID: 19576764 DOI: 10.1016/j.biortech.2009.05.055] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2009] [Revised: 05/18/2009] [Accepted: 05/20/2009] [Indexed: 05/28/2023]
Abstract
Tannin-based rigid foams, prepared from 95% natural material, are suggested for replacing synthetic phenol-formaldehyde foams in various applications. For that purpose, a few physical properties were measured and reported here: resistance to fire and chemicals, absorption of various liquids, permeability, thermal conductivity and mechanical (compressive and tensile) strength. Modifying the composition through the use of boric and/or phosphoric acid allowed substantial increase of fire resistance. The materials were also found to present good resistance to strong acid and bases, and to solvents. High affinity for water, but limited one for organic liquids, was also evidenced. Finally, slightly anisotropic mechanical properties were measured. The materials present a brittle behaviour, whether tested in compression or traction; nevertheless, their strengths, as well as their thermal conductivities, are fully comparable with those of their phenolic counterparts. We show that such materials of vegetable origins can compete with synthetic ones for most of traditional applications.
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Affiliation(s)
- G Tondi
- ENSTIB-LERMAB, Nancy-University, 27 rue du Merle Blanc, BP1041, 88051 Epinal cedex 9, France
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Zheng H, Du G, Zhao R, Tang B, Zhu N. Enhanced allogeneic skin-graft survival using sCD95L, sCD152, interleukin-10 and transforming growth factor-β in combination, and comparison with ciclosporin. Clin Exp Dermatol 2009; 34:721-7. [DOI: 10.1111/j.1365-2230.2009.03237.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: 11/28/2022]
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Liang G, Liao X, Du G, Chen J. Elevated glutathione production by adding precursor amino acids coupled with ATP in high cell density cultivation of Candida utilis. J Appl Microbiol 2008; 105:1432-40. [PMID: 18828786 DOI: 10.1111/j.1365-2672.2008.03892.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS Three precursor amino acids and adenosine triphosphate (ATP) are necessary for fermentative production of glutathione. In this study, our aims were to develop a strategy to enhance glutathione production by adding three precursor amino acids coupled with ATP in high cell density (HCD) cultivation of Candida utilis. METHODS AND RESULTS A high-glutathione yeast strain, C. utilis WSH 02-08, was used in this study. Whole fermentative process for glutathione production was divided into two phases of cell growth and glutathione synthesis. Cells concentration was increased by HCD cultivation. Meanwhile, intracellular glutathione content was enhanced by the addition of three precursor amino acids. Concentrations of three precursor amino acids added at stationary phase were optimized by response surface methodology. Moreover, the addition of ATP 15 h after the addition of the three amino acids can further enhance glutathione production. Based on aforementioned phenomenon, a strategy of adding three precursor amino acids coupled with ATP was developed to enhance glutathione production. CONCLUSION Without the addition of three precursor amino acids and the ATP, a total glutathione of 1123 mg l(-1) was achieved after 60-h cultivation. In comparison, addition of three precursor amino acid counterparts resulted in a total glutathione of 1841 mg l(-1). Moreover, by adding amino acids combined with ATP, a total glutathione of 2043 mg l(-1) was achieved after 72-h cultivation, increased by 81.9% and 11%, respectively, as compared with the control and the one without ATP addition. SIGNIFICANCE AND IMPACT OF THE STUDY This is the first report on investigating changes of the intracellular three precursor amino acids and ATP, and gamma-glutamylcysteine synthase activity in HCD cultivation of C. utilis for glutathione production. A strategy of combining addition of three precursor amino acids with ATP was developed to enhance glutathione production in C. utilis.
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Affiliation(s)
- G Liang
- School of Biotechnology, Jiangnan University, Wuxi, China
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Du G, Prevrhal S. SU-GG-I-48: Performance Evaluation of Three Algorithms for Metal Artifact Reduction in CT Imaging. Med Phys 2008. [DOI: 10.1118/1.2961446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Liang G, Du G, Chen J. Enhanced glutathione production by using low-pH stress coupled with cysteine addition in the treatment of high cell density culture of Candida utilis. Lett Appl Microbiol 2008; 46:507-12. [DOI: 10.1111/j.1472-765x.2008.02352.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Tatavarti R, Hillier G, Dzankovic A, Martin G, Tuminello F, Navaratnarajah R, Du G, Vu D, Pan N. Lightweight, low cost GaAs solar cells on 4″ epitaxial liftoff (ELO) wafers. ACTA ACUST UNITED AC 2008. [DOI: 10.1109/pvsc.2008.4922900] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Liu L, Wang M, Du G, Chen J. Enhanced hyaluronic acid production of Streptococcus zooepidemicus by an intermittent alkaline-stress strategy. Lett Appl Microbiol 2008; 46:383-8. [DOI: 10.1111/j.1472-765x.2008.02325.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [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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Liao X, Deng T, Zhu Y, Du G, Chen J. Enhancement of glutathione production by altering adenosine metabolism of Escherichia coli in a coupled ATP regeneration system with Saccharomyces cerevisiae. J Appl Microbiol 2008; 104:345-52. [PMID: 18194260 DOI: 10.1111/j.1365-2672.2007.03415.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
AIMS Adenosine triphosphate (ATP) during the enzymatic production of glutathione is necessary. In this study, our aims were to investigate the reason for low glutathione production in Escherichia coli coupled with an ATP regeneration system and to develop a new strategy to improve the system. METHODS AND RESULTS Glutathione can be synthesized by enzymatic methods in the presence of ATP and three precursor amino acids (L-glutamic acid, L-cysteine and glycine). In this study, glutathione was produced from E. coli JM109 (pBV03) coupled with an ATP regeneration system, by using glycolytic pathway of Saccharomyces cerevisiae WSH2 as ATP regenerator from adenosine and glucose. In the coupled system, adenosine used for ATP regeneration by S. cerevisiae WSH2 was transformed into hypoxanthine irreversibly by E. coli JM109 (pBV03). As a consequence, S. cerevisiae WSH2 could not obtain enough adenosine for ATP regeneration in the glycolytic pathway in spite of consuming 400 mmol l(-1) glucose within 1 h. By adding adenosine deaminase inhibitor to block the metabolism from adenosine to hypoxanthine, glutathione production (8.92 mmol l(-1)) enhanced 2.74-fold in the coupled system. CONCLUSIONS This unusual phenomenon that adenosine was transformed into hypoxanthine irreversibly by E. coli JM109 (pBV03) revealed that less glutathione production in the coupled ATP regeneration system was because of the poor efficiency of ATP generation. SIGNIFICANCE AND IMPACT OF THE STUDY The results presented here provide a strategy to improve the efficiency of the coupled ATP regeneration system for enhancing glutathione production. The application potential can be microbial processes where ATP is needed.
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Affiliation(s)
- X Liao
- Key Laboratory of Industrial Biotechnology, Ministry of Education, Jiangnan University, Wuxi, Jiangsu, China
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