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Zhang YT, Pan Z, Xia LH, Liu XN, Guo XL, He Y, Zhou J, Qu ZH, Mei G, Jin D, Ding JD. Bilayered Poly(lactide-co-glycolide) Scaffold with Platelet-Rich Plasma and Mesenchymal Stem Cells Improves Restoration of Osteochondral Defects. J BIOMATER TISS ENG 2015. [DOI: 10.1166/jbt.2015.1388] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Zhang J, Zheng L, Cao J, Chen B, Jin D. Inflammation induced by increased frequency of intermittent hypoxia is attenuated by tempol administration. ACTA ACUST UNITED AC 2015; 48:1115-21. [PMID: 26397969 PMCID: PMC4661028 DOI: 10.1590/1414-431x20154487] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Accepted: 06/26/2015] [Indexed: 11/21/2022]
Abstract
The levels of serum inflammatory cytokines and the activation of nuclear factor kappa
B (NF-κB) and hypoxia inducible factor-1α (HIF-1α) in heart tissues in response to
different frequencies of intermittent hypoxia (IH) and the antioxidant tempol were
evaluated. Wistar rats (64 males, 200-220 g) were randomly divided into 6
experimental groups and 2 control groups. Four groups were exposed to IH 10, 20, 30,
or 40 times/h. The other 2 experimental groups were challenged with IH (30 times/h)
plus tempol, either beginning on day 0 (IH30T0) or on day 29 (IH30T29). After 6 weeks
of challenge, serum levels of tumor necrosis factor (TNF)-α, intracellular adhesion
molecule (ICAM)-1, and interleukin-10 were measured, and western blot analysis was
used to detect NF-κB p65 and HIF-1α in myocardial tissues. Serum levels of TNF-α and
ICAM-1 and myocardial expression of NF-κB p65 and HIF-1α were all significantly
higher in IH rats than in controls (P<0.001). Increased IH frequency resulted in
more significant changes. Administration of tempol in IH rats significantly reduced
levels of TNF-α, ICAM-1, NF-κB and HIF-1α compared with the non-tempol-treated group
(F=16.936, P<0.001). IH induced an inflammatory response in a frequency-dependent
manner. Additionally, HIF-1α and NF-κB were increased following IH administration.
Importantly, tempol treatment attenuated this effect.
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Li N, Zhang GW, Zhang JR, Jin D, Li Y, Liu T, Wang RT. Non-alcoholic fatty liver disease is associated with progression of arterial stiffness. Nutr Metab Cardiovasc Dis 2015; 25:218-223. [PMID: 25456154 DOI: 10.1016/j.numecd.2014.10.002] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 09/27/2014] [Accepted: 10/02/2014] [Indexed: 12/30/2022]
Abstract
BACKGROUND AND AIMS NAFLD is an independent risk factor for increased cardiovascular disease. Arterial stiffness is an index of subclinical atherosclerosis. The aims of this study were to examine prospectively the relationship between Non-alcoholic fatty liver disease (NAFLD) and the progression of arterial stiffness. METHODS AND RESULTS A prospective study of 728 men and 497 women free of hypertension, and diabetes at the baseline were conducted. The subjects were followed for 5 years. The progression rate of arterial stiffness was measured by calculating the increase in brachial-ankle pulse wave velocity (baPWV) the changes of the baPWV (adjusted for age) during the study period was significantly greater in the patients with NAFLD (172.4 ± 42.1 cm/s for men, 95.8 ± 36.7 cm/s for women) than in the subjects without NAFLD (70.3 ± 56.5 cm/s for men, 55.4 ± 42.2 cm/s for women). For the subjects with metabolic syndrome, after adjusting for multiple risk factors, NAFLD was a significant predictor of baPWV progression (for male, β = 0.843; P < 0.001; for female, β = 0.575; P < 0.001, respectively). In addition, results were unmodified in subjects without metabolic syndrome. CONCLUSIONS NAFLD was found to be an independent predictor of faster progression of baPWV even after adjusting other cardiovascular risk factors. These prospective data support a pathogenic role for NAFLD in the development of arterial stiffness.
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Jin D, Deng B, Li JX, Cai W, Tu L, Chen J, Wu Q, Wang WH. A microfluidic device enabling high-efficiency single cell trapping. BIOMICROFLUIDICS 2015; 9:014101. [PMID: 25610513 PMCID: PMC4288539 DOI: 10.1063/1.4905428] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Accepted: 12/22/2014] [Indexed: 05/03/2023]
Abstract
Single cell trapping increasingly serves as a key manipulation technique in single cell analysis for many cutting-edge cell studies. Due to their inherent advantages, microfluidic devices have been widely used to enable single cell immobilization. To further improve the single cell trapping efficiency, this paper reports on a passive hydrodynamic microfluidic device based on the "least flow resistance path" principle with geometry optimized in line with corresponding cell types. Different from serpentine structure, the core trapping structure of the micro-device consists of a series of concatenated T and inverse T junction pairs which function as bypassing channels and trapping constrictions. This new device enhances the single cell trapping efficiency from three aspects: (1) there is no need to deploy very long or complicated channels to adjust flow resistance, thus saving space for each trapping unit; (2) the trapping works in a "deterministic" manner, thus saving a great deal of cell samples; and (3) the compact configuration allows shorter flowing path of cells in multiple channels, thus increasing the speed and throughput of cell trapping. The mathematical model of the design was proposed and optimization of associated key geometric parameters was conducted based on computational fluid dynamics (CFD) simulation. As a proof demonstration, two types of PDMS microfluidic devices were fabricated to trap HeLa and HEK-293T cells with relatively significant differences in cell sizes. Experimental results showed 100% cell trapping and 90% single cell trapping over 4 × 100 trap sites for these two cell types, respectively. The space saving is estimated to be 2-fold and the cell trapping speed enhancement to be 3-fold compared to previously reported devices. This device can be used for trapping various types of cells and expanded to trap cells in the order of tens of thousands on 1-cm(2) scale area, as a promising tool to pattern large-scale single cells on specific substrates and facilitate on-chip cellular assay at the single cell level.
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Toyomasu Y, Demizu Y, Hashimoto N, Takagi M, Mima M, Terashima K, Fujii O, Jin D, Suga M, Takada A, Ii N, Niwa Y, Sasaki R, Murakami M, Hishikawa Y, Abe M, Nomoto Y, Sakuma H, Fuwa N. Treatment Outcomes of Particle Therapy Using Protons or Carbon Ions for Locally Advanced Head and Neck Squamous Cell Carcinoma. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2014.05.1695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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81
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Jaeger S, Reinbach H, Roigard C, McRae J, Pineau B, Chheang S, Beresford M, Rouse S, Jin D, Paisley A, Jia Y, Newcomb R. Sensory characterisation of food and beverage stimuli containing β-ionone and differences between individuals by genotype for rs6591536. Food Res Int 2014. [DOI: 10.1016/j.foodres.2014.02.038] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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82
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Jin D, Lee MC. Establishing Korean Polar Data Management Policy and Its Future Directions. DATA SCIENCE JOURNAL 2014. [DOI: 10.2481/dsj.ifpda-03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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83
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Fujii O, Demizu Y, Hashimoto N, Takagi M, Terashima K, Mima M, Jin D, Fuwa N, Niwa Y, Murakami M. EP-1159: Outcomes of involved-field particle radiotherapy for stage II-III nonsmall cell lung cancer. Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31277-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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84
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Mima M, Demizu Y, Jin D, Hashimoto N, Takagi M, Terashima K, Fujii O, Niwa Y, Akagi T, Daimon T, Hishikawa Y, Abe M, Murakami M, Sasaki R, Fuwa N. Particle therapy using carbon ions or protons as a definitive therapy for patients with primary sacral chordoma. Br J Radiol 2013; 87:20130512. [PMID: 24288399 DOI: 10.1259/bjr.20130512] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE This study retrospectively evaluated the efficacy and toxicity of particle therapy using carbon ions or protons for primary sacral chordomas. METHODS We evaluated 23 patients with primary sacral chordoma treated with carbon ion therapy (CIT) or proton therapy (PT) between July 2005 and June 2011 at the Hyogo Ion Beam Medical Center, Hyogo, Japan. The median patient age was 72 years. 14 patients were treated with 70.4 Gy equivalents (GyE) in 16 fractions and 9 were treated with 70.4 GyE in 32 fractions. CIT was used for 16 patients, and PT was used for 7 patients. RESULTS The median follow-up period was 38 months. At 3 years, local control (LC), overall survival (OS) and progression-free survival (PFS) for all patients were 94%, 83% and 68%, respectively. The log-rank test revealed that male sex was significantly related to better PFS (p=0.029). No other factors, including dose fractionation and ion type, were significant for LC, OS or PFS. In nine patients, ≥ Grade 3 acute dermatitis was observed, and ≥ Grade 3 late toxicities were observed in nine patients. The 32-fraction protocol reduced severe toxicities in both the acute and late phases compared with the 16-fraction protocol. CONCLUSION Particle therapy for patients with sacral chordoma showed favourable LC and OS. Severe toxicities were successfully reduced by modifying the dose fractionation and treatment planning in the later treatment era. Thus, this therapeutic modality should be considered useful and safe. ADVANCES IN KNOWLEDGE This is the first study including both CIT and PT for sacral chordomas.
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Masubuchi S, Komeda K, Takai S, Jin D, Tashiro K, Li ZL, Otsuki Y, Okamura H, Hayashi M, Uchiyama K. Chymase inhibition attenuates monocrotaline-induced sinusoidal obstruction syndrome in hamsters. Curr Med Chem 2013; 20:2723-9. [PMID: 23521680 DOI: 10.2174/0929867311320210008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Revised: 01/26/2013] [Accepted: 03/13/2013] [Indexed: 11/22/2022]
Abstract
Chymase stored in mast cells activates matrix metalloproteinase (MMP)-9, which may relate to the progression of sinusoidal obstruction syndrome (SOS). We investigated the preventive effect of a chymase inhibitor, TY-51469, on monocrotaline-induced SOS in hamsters. Hamsters were orally administrated with a single dose of monocrotaline (120 mg/kg) to induce SOS. Treatment with TY-51469 (1 mg/kg per day) or placebo had started 3 days before the monocrotaline administration. Two days after the monocrotaline administration, significant increases in aspartate aminotransferase, alanine aminotransferase and total bilirubin and a significant reduction of albumin were observed in plasma, but their changes were significantly attenuated by treatment with TY-51469. The numerous hepatic necrosis areas were observed in the placebo-treated group, but the ratio of necrotic area to total area in liver had been significantly reduced by treatment with TY-51469. Both chymase activity and MMP-9 level in liver were significantly augmented in the placebo-treated group. Furthermore, tumor necrosis factor (TNF)-α level in liver was also augmented in the placebo-treated group. However, the chymase activity and levels of MMP-9 and TNF-α were significantly attenuated in the TY-51469-treated group. Until 14 days after monocrotaline administration, survival rates in the placebo- and TY-51469-treated groups were 25% and 70%, respectively, and a significant difference was observed. In conclusion, chymase inhibition by TY-51469 may prevent the accelerating of severity in monocrotaline-induced SOS in hamsters.
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Schmeiser T, Saar P, Jin D, Noethe M, Müller A, Soydan N, Hardt PD, Jaeger C, Distler O, Roeb E, Bretzel RG, Müller-Ladner U. Profile of gastrointestinal involvement in patients with systemic sclerosis. Rheumatol Int 2011; 32:2471-8. [PMID: 21769490 DOI: 10.1007/s00296-011-1988-6] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2010] [Accepted: 07/03/2011] [Indexed: 02/07/2023]
Abstract
Systemic sclerosis (SSc) is a chronic autoimmune connective tissue disease. Of the numerous organ manifestations, involvement of the upper and lower gastrointestinal tract (GIT) appears to be the most frequent with regard to the clinical symptoms. However, as the frequency and clinical relevance of GI involvement in patients with SSc are not known in detail, the German network of the systemic sclerosis (DNSS) has developed a detailed questionnaire to evaluate the extent and profile of gastrointestinal involvement in SSc patients. The multi-symptom questionnaire was used at baseline and after 1 year in registered patients of the DNSS. In addition, the results were compared with gastrointestinal disorders in patients with SSc and other rheumatic diseases, as well as with the medical history of the patients. In total, 90 patients were included in the study. The results of the study show that in reality, a much higher (nearly all) percentage of (98,9%) patients than expected suffer from GI-symptoms, regardless of the stage of their disease. Of these, meteorism (87,8%) was the most common followed by coughing/sore voice (77,8%), heartburn (daytime 68,9%, nighttime 53,3%), diarrhea (67,8%), stomach ache (68,9%) and nausea (61,1%). Although SSc patients were treated according to the respective recommendations, only limited improvements with regard to GI-symptoms could be achieved after 1 year of follow-up. In addition, the study revealed that the multi-symptom questionnaire is a useful tool to contribute to identify the gastrointestinal sequelae in systemic sclerosis.
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Chen X, Jin D, Dai J. SU-E-T-787: Noncoplanar Intensity-Modulated Radiation Therapy for Young Female Patients with Mediastinal Lymphoma. Med Phys 2011. [DOI: 10.1118/1.3612751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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88
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Bai S, Xin Y, Jin D, Kaur S, Nijem I, Bothos JG, Peterson AC, Patel PH. Population pharmacokinetic analysis from phase I and phase II studies of the humanized monovalent antibody, MetMAb, in patients with advanced solid tumors. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.2571] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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89
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Xin Y, Gordon MS, Jin D, Wakshull E, Chen DS, Rosen LS, Munster PN, Naumovski L, Bai S. Population pharmacokinetic (PK) analysis supports fixed dosing for the humanized monoclonal antibody (huMAb) anti-EGFL7 (MEGF0444A) administered intravenously in patients with advanced solid tumors. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.2586] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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90
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Xu S, Bivona BJ, Jin D, Takai S, Harrison‐Bernard LM. Reduced renal vascular ACE activity in diabetes. FASEB J 2011. [DOI: 10.1096/fasebj.25.1_supplement.665.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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91
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Bai C, Wang D, Li C, Jin D, Li C, Guan W, Ma Y. Establishment and biological characteristics of a Jingning chicken embryonic fibroblast bank. Eur J Histochem 2011; 55:e4. [PMID: 21556119 PMCID: PMC3167350 DOI: 10.4081/ejh.2011.e4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2010] [Revised: 11/11/2010] [Accepted: 12/09/2010] [Indexed: 11/23/2022] Open
Abstract
Using tissue explantation and cryopreservation biotechniques, a Jingning chicken embryonic fibroblast bank was successfully established, which includes 43 embryo samples and a stock of 178 cryovials, each one containing 3.0×106 cells. Most of the cells were apparently fibroblasts in their morphology, and the population doubling time (PDT) was about 48 h. The total chromosome number of a diploid cell was 78. According to karyotyping and G-banding, the diploid rate in the cell bank was 97.62±2.12%. The cells were tested for microbial contamination and found free of infections from bacteria, fungi, viruses and mycoplasms. There was no cross-contamination from other cell lines as revealed by lactate dehydrogenase (LDH) and malate dehydrogenase (MDH) isoenzyme polymorphisms. Six fluorescent proteins were transfected into the Jingning chicken embryonic fibroblasts, and the transfection efficiencies of these genes were between 10.1 and 41.9%. All the tests showed that the quality of the cell line conforms to the quality criteria of the ATCC (American type culture collection). This work succeeded not only in preserving the genetic resources of Jingning chicken, but it also established a new protocol to preserve endangered animal breeds.
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Hou L, Jin D, Gu E, Pu Y, Li F, Guan W, Ma Y. Isolation and characterization of duck embryonic neural stem and progenitor cells. Poult Sci 2011; 90:609-17. [DOI: 10.3382/ps.2010-01011] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
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93
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Takai S, Jin D, Miyazaki M. Chymase as an important target for preventing complications of metabolic syndrome. Curr Med Chem 2011; 17:3223-9. [PMID: 20666722 DOI: 10.2174/092986710792232003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2010] [Accepted: 07/09/2010] [Indexed: 11/22/2022]
Abstract
Chymase plays a crucial role in angiotensin II formation in various tissues. Angiotensin II induces gene expressions of transforming growth factor (TGF)-β and matrix metalloproteinase (MMP)-9, and chymase also converts precursors of TGF-β and MMP-9 to their active forms. All of angiotensin II, TGF-β and MMP-9 are considered to be closely involved in the development and progression of metabolic syndrome and its complications. In a diabetic animal model, chymase induced pancreatic disorganization via attack of oxidative stress induced by augmentation of chymase-forming angiotensin II. In atherosclerotic lesions in patients, accumulation of chymase-positive cells was observed, and chymase inhibition prevented the development of atherosclerosis in an animal model. In Apo E-deficient mice, chymase inhibition prevents the development of angiotensin II-induced abdominal aneurysmal aorta (AAA). In this model, the AAA development on an increase in MMP-9 activities induced by angiotensin II, but the inhibition of MMP-9 activation by chymase inhibitor resulted in attenuation of the AAA development. Cardiac dysfunction after myocardial infarction was also attenuated by chymase inhibition. Steatosis and fiblosis in liver were strongly prevented by chymase inhibition in an animal model with nonalcoholic steatohepatitis which is involved in metabolic syndrome. Therefore, chymase inhibition may be useful for attenuating MMP-9 and TGF-β levels, in addition to reducing angiotensin II formation, and this function may provide powerful preventions of organ damages. In this review, we propose the significance of chymase as a target to prevent complications of metabolic syndrome.
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Xu X, Miao X, Liao N, Wang N, Jin D, Yao K. Breakthrough Analysis for Adsorption of Phosphine on 5A Molecular Sieve. Chem Eng Technol 2010. [DOI: 10.1002/ceat.201000281] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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95
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Yu N, Xun Y, Jin D, Yang H, Hang T, Cui H. Effect of sperminated pullulans on drug permeation through isolated rabbit cornea and determination of ocular irritation. J Int Med Res 2010; 38:526-35. [PMID: 20515566 DOI: 10.1177/147323001003800215] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The aim of this study was to investigate the effect of two sperminated pullulans (SP) with a different number of amino groups (SP-L, amino group content 0.124 mmol/g polymer; and SP-H, amino group content 0.578 mmol/g polymer) on the permeation of drugs through isolated rabbit corneas. Determination of corneal hydration levels and Draize eye tests were performed to assess the safety of SP both in vitro and in vivo. For 0.2% (w/v) SP-L and 0.2% (w/v) SP-H, the enhancement ratios (ERs) with dexamethasone of 1.34 and 1.42, respectively, were not statistically significant. For ofloxacin, tobramycin and sodium fluorescein, the ERs with 0.2% SP-L were 1.37, 2.02 and 2.12, respectively, and with 0.2% SP-H the ERs were 1.84, 4.69 and 6.87, respectively; these ERs were all statistically significant. Enhancement increased with increasing amino group content of the SP. The improved transcorneal drug absorption via the paracellular route indicated opening of the tight junctions in the corneal epithelium. Irritation tests indicated that 0.2% SP-L and 0.2% SP-H did not damage the corneal tissues.
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Wang H, Yan Z, Hou Y, Jin D. Molecular characterization of suppression of hepatitis B virus transcription by hepatitis C virus core protein. ACTA ACUST UNITED AC 2009; 40:648-56. [PMID: 18726290 DOI: 10.1007/bf02882696] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/1997] [Indexed: 11/26/2022]
Abstract
To further elucidate the molecular mechanisms underlying the suppression of hepatitis B virus (HBV) expression by the hepatitis C virus (HCV) core protein, five molecular clones of HCV cDNA sequence containing the 5' noncoding (5'NC) and the core regions have been isolated from Chinese HBV- and HCV-coinfected patients. Sequence comparison and phylogenetic analysis showed that the HCV sequence cloned from coinfected individuals is indistinguishable from that identified in other patients. Cotransfection assay confirmed that the core protein expressed from one of the cloned sequence is capable of suppressing the expression of hepatitis B surface and e antigens (HBsAg and HBeAg, respectively). Deletion mapping revealed that the C-terminal hydrophobic region of the HCV. core is necessary for the suppression. Results from reporter assays demonstrated that HCV core protein interacts with the HBV C promoter and enhancer II elements and down-regulates the transcription of HBV as well as other cellular and heterologous viral genes in both hepatic and non-hepatic cell lines. Taken together, the findings suggest HCV core protein as a multifunctional negative regulator of transcription critically involved in the molecular interactions between HBV and HCV, and between HCV and the cell.
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97
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Jin D, Tan H, Lei T, Gan L, Chen X, Long Q, Feng B, Yang Z. Molecular cloning and characterization of porcine sirtuin genes. Comp Biochem Physiol B Biochem Mol Biol 2009; 153:348-58. [DOI: 10.1016/j.cbpb.2009.04.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2009] [Revised: 04/17/2009] [Accepted: 04/19/2009] [Indexed: 11/16/2022]
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98
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Wang X, Cui Z, Jin D, Tang L, Xia S, Wang H, Xiao Y, Qiu H, Hao Q, Kan B, Xu J, Jing H. Distribution of pathogenic Yersinia enterocolitica in China. Eur J Clin Microbiol Infect Dis 2009; 28:1237-44. [PMID: 19575249 DOI: 10.1007/s10096-009-0773-x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2008] [Accepted: 06/20/2009] [Indexed: 11/29/2022]
Abstract
Yersinia enterocolitica (1,295 strains) was isolated from diarrhea patients, livestock, poultry, wild animals, insect vectors, food, and the environment. They were studied for epidemiology distribution using bacterial biochemical metabolism tests, their virulence genes, and pulsed-field gel electrophoresis (PFGE) sub-typing. The data showed that 416 of the 1,295 strains were pathogenic, where the pathogenic Chinese isolates were of serotypes O:3 and O:9. These two serotypes were found in livestock and poultry, with swine serving as the major reservoir. The geographic distribution of pathogenic isolates was significantly different, where most of the strains were isolated from the cold northern areas, whereas some serotype O:3 strains were recovered from the warm southern areas. By the analysis of the data of the Ningxia Hui Autonomous Region, we find the phenomenon of 'concentric circle distribution' around animal reservoirs and human habitation. The clustering of PFGE showed that the patterns of the pathogenic strains isolated from diarrhea patients were identical compared to those from the animals in the same area, thus, suggesting that the human infection originated from the animals.
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Jin D, Rong Y, Lou W, Qin X, Wu W, Nin X, Nin X, Wang D, Kuang T, Qin Y. Therapeutic vaccination against advanced pancreatic cancer by autologous dendritic cells pulsed with a MUC1 peptide: Preclinical results of a clinical phase I trial. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e15652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e15652 Background: Pancreatic ductal adenocarcinoma has a particularly poor prognosis. Therefore, novel therapeutic strategies such as immunotherapy are required. The aim of the present phase I study was to evaluate the safety, immune responses and clinical activity of a vaccine based on autologous dendritic cells (DC) pulsed with a specific MUC1 peptide in advanced pancreatic cancer patients. Methods: Five patients who had pancreatic cancer ductal adenocarcinoma expressing MUC1 in stage of III/IV were enrolled to the clinical trial. Patients underwent leukapheresis to generate dendritic cells by culture in vitro with granulocyte macrophage colony-stimulating factor and interleukin-4 for 5 days. Dendritic cells were then pulsed overnight with MUC1 peptide (GVTSAPDTRPAPGSTAPPAH) and harvested for vaccination. Dendritic cells (3×106-6×106) were injected intradermally every 2 weeks for 3–4 times. Results: All patients remained with progressive disease. Four patients developed strong T-cell IFN-γ and Granzyme B Elispot responses to the vaccine. Most interestingly, the patient who was treated with the highest number of DC(6×106) had more number of CTL than other patients and showed delayed-type hypersensitivity responses at injection sites and this patient stopped application of the analgetics. Another patient with relapsed pancreatic cancer who had finished the 4 times of vaccination and then followed 6 times of chemotherapy with Gemcitabine had a surprisingly long term of survival of 12 month. No evidence of significant treatment related toxicity or auto-immunity was observed. Conclusions: This study showed the safety and clinical response of MUC1 peptide-pulsed dendritic cell therapy for patients with advanced pancreatic cancer. It confirms the capability of this DC vaccine to stimulate an immune response in patients with pancreatic cancer even in the presence of a large tumor burden. Dendritic cell therapy is recommended for further clinical studies in pancreatic cancer patients. No significant financial relationships to disclose.
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Wu W, Jin D, Lou W, Fan J, Wang D, Qin X. A novel recombinant tandem repeat DNA vaccine targeting at MUC1. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.3066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
3066 Background: Tandem repeat (TR) is the key epitope of mucin 1 (MUC1) for inducing cytotoxic T lymphocytes (CTL) to kill the tumor cells specifically. A novel recombinant TR DNA vaccine was constructed to study its induced immune responses. Methods: A recombinant human TR (rhTR) gene encoding a single TR polypeptide of MUC1 was synthesized and cloned into the multiple cloning sites of plasmid pcDNA3.1/Myc-his (+) A to construct the recombinant plasmid pcDNA3.1-TR/Myc-his (+) A (pTR plasmid). Expression of pTR plasmid was confirmed by transfection assay and Western blot analysis. C57BL/6 (H-2b) mice were immunized with pTR plasmid (n=15) by tibial muscle injection. Mice inoculated with the empty vector (EV group, n=15) and 0.9% NaCl solution (NS group, n=15) were used as vector and blank control respectively. Four weeks later, all mice were immunized again. Specific antibody detection and cytotoxic assay were used to evaluate the vaccine-induced TR specific immune responses. Results: DNA sequencing confirmed that the pTR plasmid was exactly constructed. Transfection assay and Western blot analysis found that the transfected COS7 cells expressed TR polypeptide of MUC1 48 hours after transfection. Cytotoxic assay showed that immunization with pTR plasmid into C57BL/6 mice resulted in more efficient induction of CTL specific cytolysis against TR polypeptide than that of EV group and NS group (p<0.01). Vaccine immunized mice had a higher equivalent concentration of anti-TR specific antibodies (2324μg/ml±238μg/ml) than that of EV group (1896μg/ml±533μg/ml, p<0.01) and NS group (1736μg/ml±142μg/ml, p<0.01). Conclusions: The novel recombinant TR DNA vaccine targeting at MUC1 was exactly constructed, immunization with which could induce TR specific CTL response and antibodies response in mice. No significant financial relationships to disclose.
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