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Yong-Ping Chen,Feng-Bin Lu,Da-Zhi Chen,Lu Chen,En-De Hu,Jin-Lu Wu,Hui Li,Yue-Wen Gong,Zhuo Lin,Xiao-Dong Wang,Ji Li,Xiao-Ya Jin,Lan-Man Xu 한국분자세포생물학회 2019 Molecules and cells Vol.42 No.12
MicroRNA-223-3p (miR-223-3p) is one of the potential microRNAs that have been shown to alleviate inflammatory responses in pre-clinical investigations and is highly encased in exosomes derived from bone mesenchymal stem cells (MSC-exosomes). MSC-exosomes are able to function as carriers to deliver microRNAs into cells. Autoimmune hepatitis is one of the challenging liver diseases with no effective treatment other than steroid hormones. Here, we examined whether MSC-exosomes can transfer miR-223-3p to treat autoimmune hepatitis in an experimental model. We found that MSC-exosomes were successfully incorporated with miR-223-3p and delivered miR-223-3p into macrophages. Moreover, there was no toxic effect of exosomes on the macrophages. Furthermore, treatments of either exosomes or exosomes with miR-223-3p successfully attenuated inflammatory responses in the liver of autoimmune hepatitis and inflammatory cytokine release in both the liver and macrophages. The mechanism may be related to the regulation of miR-223-3p level and STAT3 expression in the liver and macrophages. These results suggest that MSC-exosomes can be used to deliver miR-223-3p for the treatment of autoimmune hepatitis.
Prognostic Significance of CD44v6/v7 in Acute Promyelocytic Leukemia
Chen, Ping,Huang, Hui-Fang,Lu, Rong,Wu, Yong,Chen, Yuan-Zhong Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.8
CD44v, especially splice variants containing exon v6, has been shown to be related closely to development of different tumors. High levels of CD44v6/v7 have been reported to be associated with invasiveness and metastasis of many malignancies. The objective of this study was to detect expression of CD44v6-containing variants in patients with acute promyelocytic leukemia (APL) and evaluate the potential of CD44v6/v7 for risk stratification. Reverse transcription polymerase chain reaction (RT-PCR) followed by PCR product purification, ligation into T vectors and positive clone sequencing were used to detect CD44 v6-containing variant isoforms in 23 APL patients. Real-time quantitative PCR of the CD44v6/v7 gene was performed in patients with APL and in NB4 cells that were treated with all-trans retinoic acid (ATRA) or arsenic trioxide ($As_2O_3$). Sequencing results identified four isoforms (CD44v6/v7, CD44v6/v8/v10, CD44v6/v8/v9/v10, and CD44v6/v7/v8/v9/v10) in bone marrow mononuclear cells of 23 patients with APL. The level of CD44v6/v7 in high-risk cases was significantly higher than those with low-risk. Higher levels of CD44v6/v7 were found in three patients with central nervous system relapse than in other patients inthe same risk group. Furthermore, in contrast to ATRA, only $As_2O_3$ could significantly down-regulate CD44v6/v7 expression in NB4 cells. Our data suggest that CD44v6/v7 expression may be a prognostic indicator for APL.
Deregulated Expression of Cry1 and Cry2 in Human Gliomas
Luo, Yong,Wang, Fan,Chen, Lv-An,Chen, Xiao-Wei,Chen, Zhi-Jun,Liu, Ping-Fei,Li, Fen-Fen,Li, Cai-Yan,Liang, Wu Asian Pacific Journal of Cancer Prevention 2012 Asian Pacific journal of cancer prevention Vol.13 No.11
Growing evidence shows that deregulation of the circadian clock plays an important role in the development of malignant tumors, including gliomas. However, the molecular mechanisms of gene chnages controlling circadian rhythm in glioma cells have not been explored. Using real time polymerase chain reaction and immunohistochemistry techniques, we examined the expression of two important clock genes, cry1 and cry2, in 69 gliomas. In this study, out of 69 gliomas, 38 were cry1-positive, and 51 were cry2-positive. The expression levels of cry1 and cry2 in glioma cells were significantly different from the surrounding non-glioma cells (P<0.01). The difference in the expression rate of cry1 and cry 2 in high-grade (grade III and IV) and low-grade (grade 1 and II) gliomas was non-significant (P>0.05) but there was a difference in the intensity of immunoactivity for cry 2 between high-grade gliomas and low-grade gliomas (r=-0.384, P=0.021). In this study, we found that the expression of cry1 and cry2 in glioma cells was much lower than in the surrounding non-glioma cells. Therefore, we suggest that disturbances in cry1 and cry2 expression may result in the disruption of the control of normal circadian rhythm, thus benefiting the survival of glioma cells. Differential expression of circadian clock genes in glioma and non-glioma cells may provide a molecular basis for the chemotherapy of gliomas.
Chen, Kang-Yin,Rha, Seung-Woon,Li, Yong-Jian,Poddar, Kanhaiya L,Jin, Zhe,Minami, Yoshiyasu,Wang, Lin,Li, Guang-Ping,Saito, Shigeru,Park, Jae-Hyoung,Na, Jin-Oh,Choi, Cheol Ung,Lim, Hong-Euy,Kim, Jin-Wo Blackwell Publishing Ltd 2009 Clinical and Experimental Pharmacology & Physiolog Vol.36 No.11
<P>Summary</P><P>1. Both peripheral arterial disease (PAD) and coronary artery spasm (CAS) are associated with endothelial dysfunction. Thus, a higher incidence of CAS may be expected in patients with PAD. In the present study, we evaluated the incidence and characteristics of CAS in patients with PAD.</P><P>2. A total of 78 patients with PAD and 241 age- and gender-matched patients without PAD who had chest pain with normal coronary appearance on coronary angiograms underwent intracoronary acetylcholine (ACh) provocation test. Acetylcholine was injected into the left coronary artery in incremental doses of 20, 50 and 100 &mgr;g/min. Significant CAS was defined as a transient > 70% luminal narrowing with concurrent chest pain and/or ST segment changes.</P><P>3. Patients with PAD had a significantly higher incidence of ACh-induced significant CAS than those without PAD (60.3 vs 34.0%, respectively <I>P</I> < 0.001), as well as chest pain and ST segment changes during the ACh provocation test. Patients with PAD were more sensitive to lower doses of ACh and had a higher incidence of multivessel spasm than those without PAD. Multivariable logistic analysis showed that age, current smoking, PAD and myocardial bridge were independent predictors of ACh-induced significant CAS. Moreover, of these factors, PAD was the strongest independent predictor (odds ratio 4.25; confidence interval 1.33–13.54; <I>P</I> = 0.014).</P><P>4. In patients with chest pain, the presence of arterial disease at another site should still push the clinician towards treating the chest pain as angina, even if the coronary anatomy is normal on a coronary angiogram.</P>
Transcriptional Analysis of the DNA Polymerase Gene of Bombyx mori Parvo-like Virus (China Isolate)
Yong-Jie Wang,Ke-Ping Chen,Qin Yao,Xu Han 한국미생물학회 2007 The journal of microbiology Vol.45 No.2
The Bombyx mori parvo-like virus (China isolate) DNA polymerase (BmDNV-3 dnapol) gene has been tentatively identified based on the presence of conserved motifs. In the present study, we perform a transcriptional analysis of the BmDNV-3 dnapol gene using the total RNA isolated from BmDNV-3 infected silkworm at different times. Northern blot analysis with a BmDNV-3 dnapol-specific riboprobe showed a major transcript of 3.3 kb. 5′-RACE revealed that the major transcription start point was located 20 nucleotides downstream of the TATA box. In a temporal expression analysis using differential RT-PCR, BmDNV-3 dnapol transcript was detected at low levels at 6 h.p.i., increased from 6 to 36 h.p.i., and remained fairly constant thereafter. Analysis of the predicted DNA polymerase sequence using neighborjoining and protein parsimony algorithms indicated that the predicted 1115-residue polypeptide contained five motifs associated with DNA polymerases synthetic activities and three additional motifs associated with polymerases possessing 3′to 5′exonuclease activity. The molecular phylogenetic analysis of this gene supported the placement of Bombyx mori parvo-like virus in a separate virus family.
Physiological Response of Young Seedlings from Five Accessions of Diospyros L. under Salinity Stress
Ping Wei,Yong Yang,Ming Fang,Fei Wang,Hejie Chen 한국원예학회 2016 원예과학기술지 Vol.34 No.4
Salinity stress limits plant cultivation in many areas worldwide; however, persimmon (Diospyros spp.) has high tolerance to salt. Five accessions of Diospyros [three of Diospyros lotus (accession numbers 824, 846, and 847); one of Diospyros kaki var. sylvestris (869); and one of Diospyros virginiana (844)] were chosen for analysis of salinity stress. We compared the effects of salt stress on plant growth, relative water content (RWC), malondialdehyde (MDA), electrolyte leakage (EL), hydrogen peroxide content (H₂O₂), and antioxidative enzyme activities (superoxide dismutase, SOD; catalase, CAT; peroxidase, POD; and ascorbate peroxidase, APX) in leaves of healthy potted seedlings from each of the five accessions after salt treatment for 25 days. Salt stress affected the growth of plants in all five accessions, with all three D. lotus accessions showing the most severe effect. Salt stress increased membrane lipid peroxidation in all accessions, but a stronger increase was observed in the three D. lotus accessions. Moreover, accumulation of H₂O₂ was faster in salt-sensitive D. lotus compared to salt-tolerant D. virginiana 844. The activities of all antioxidant enzymes increased in D. virginiana 844 and in D. kaki var. sylvestris 869; the activities of SOD, CAT, and APX were at similar levels in D. virginiana 844 and D. kaki var. sylvestris 869, but POD activity was stimulated to a greater extent in D. virginiana 844. The activities of all antioxidant enzymes (except POD) decreased in D. lotus 824 and increased (except for SOD) in D.lotus 846. The activities of SOD and APX decreased in D. lotus 847, whereas POD and CAT activities both increased. Relative water content decreased significantly in D. lotus . No significant changes in lipid peroxidation or relevant antioxidant parameters were detected in any of the accessions in controls treated with 0.0% NaCl. D. virginiana 844 had higher antioxidant capacity in response to salinity compared to other persimmon rootstocks. These results indicate that changes of these key physiological variables are related to salinity resistance in different accessions of persimmon.
Effects of Drought Stress on the Antioxidant Systems in Three Species of Diospyros L.
Ping Wei,Yong Yang,Fei Wang,Hejie Chen 한국원예학회 2015 Horticulture, Environment, and Biotechnology Vol.56 No.5
Drought stress is a limiting factor for plant cultivation in many areas of China and persimmon has good capacity to withstand water shortage. Three species of Diospyros (three accession of Diospyros lotus, referred to as accession No. 824, 846, and 847; one accession of Diospyros kaki var. sylvestris referred to as 869; and one accession of Diospyros virginiana referred to as 844) were chosen for drought stress analysis. We withheld water from healthy two-year-old potted seedlings for 20 days, and compared the effects of water stress on malondialdehyde (MDA), superoxide free radical (O2.-), hydrogen peroxide (H2O2), antioxidative enzyme, glutathione (GSH), and ascorbic acid (AsA) levels in the leaves of the three species. In the treatment group, water stress increased the membrane lipid peroxidation in the three species, but a more significant increase was observed in the D. kaki var. sylvestris 869 than in the D. virginiana 844. Moreover, accumulation of O2.- and H2O2 was faster in weakly drought-resistant hybrids than in the highly drought- resistant hybrids. Though the activities of antioxidant enzymes and antioxidant contents were increased in the three species under drought stress, the activities of superoxide dismutase, catalase, peroxidase and ascorbate peroxidase were stimulated to a greater extent in D. virginiana 844 than in D. lotus and D. kaki var. sylvestris 869. In addition, the GSH, AsA, and relative water contents were increased significantly in D. virginiana 844, but not in D. kaki var. sylvestris 869. In the control group, no significant changes in lipid peroxidation and relevant antioxidant parameters were detected among the three species. These results indicated that changes of MDA, O2.-, and H2O2 content, antioxidative enzyme activities, and GSH and AsA concentrations were correlated to drought resistance in the different species. D. virginiana 844 had a higher antioxidation capacity in response to drought than the other two species.