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Lu JY, Zhang M, Lin JA, Chen HR, Li YJ, Gao X, Wang CX, Liu LS, Liao X. [A control study of steroid withdrawal protection strategy after kidney transplantation in children]. Zhonghua Er Ke Za Zhi 2023; 61:799-804. [PMID: 37650161 DOI: 10.3760/cma.j.cn112140-20230212-00097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
Objective: To study the influence of steroid withdrawal protection strategy on height growth in pediatric patients after kidney transplantation. Methods: The prospective cohort study enrolled 40 stage 5 chronic kidney disease children receiving kidney transplantation from July 2017 to September 2022 at Guangzhou Women and Children's Medical Center. Based on the primary preoperative disease, patients with immune abnormality-associated glomerular diseases or unknown causes were assigned to the steroid maintenance group, in which patients received steroid tapering within 3 months after surgery to a maintenance dose of 2.5 to 5.0 mg/d. While patients with hereditary kidney disease or congenital urinary malformations were assigned to the steroid withdrawal group, in which patients had steroids tapered off within 3 months. The characteristics of height catch-up growth and clinical data were compared between the 2 groups at baseline, 6, 12, 18 and 24 months after kidney transplantation. T-test, repeated measurement of variance analysis, Mann-Whitney U test, and Fisher exact test were used for the comparison between the 2 groups. Results: Among the 40 children, 17 were males, 23 were females, 25 were in the steroid withdraw group ((7.8±2.8) years old when receiving kidney transplantation) and 15 cases were in the steroid maintenance group ((7.6±3.5) years old when receiving kidney transplantation). The study population was followed up for (26±12) months. The total dose per unit body weight of steroids in the steroid withdrawal group was lower than that in the steroid maintenance group ((0.13±0.06) vs. (0.36±0.19) mg/(kg·d), t=5.83, P<0.001). The height catch-up rate (ΔHtSDS) in the first year after kidney transplantation in the steroid withdraw and steroid maintenance groups was 1.0 (0.7, 1.4) and 0.4 (0.1, 1.0), respectively; in the second year, the ΔHtSDS in the steroid withdraw group was significantly higher than that in the steroid maintenance group (1.1 (0.2, 1.7) vs. 0.3 (0, 0.8), U=28.00, P=0.039). The HtSDS in the steroid withdrawal group at the five follow-up time points was -2.5±0.8, -2.0±0.8, -1.5±0.8, -1.3±0.9 and -0.5±0.3, respectively, while in the steroid maintenance was -2.4±1.3, -2.2±1.1, -2.0±1.0, -1.8±1.0 and -1.6±1.0, respectively. There were statistically significant differences in HtSDS at different follow-up time points in both 2 groups (F=19.81, P<0.01), but no statistical differences in overall impact between the 2 groups (F=1.13, P=0.204). The steroid treatment was interaction with the increase of follow-up time (F=3.62, P=0.009). At the 24th month after transplantation, the HtSDS in the steroid withdrawal group was significantly higher than that in the steroid maintenance group (P=0.047). Six patients in the steroid withdrawal group experienced antibody-mediated immune rejection (AMR), while 3 did in the steroid maintenance group. Moreover, there was no significant difference in AMR between the two groups (χ2=0.06, P=0.814). Conclusion: The steroid withdrawal protection strategy favors the height catch-up growth in pediatric patients after kidney transplantation and does not increase the risk of postoperative antibody-mediated immune rejection.
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Affiliation(s)
- J Y Lu
- Department of Nephology, Guangzhou Women and Children's Medical Center, Guangzhou 510120, China
| | - M Zhang
- Department of Nephology, Guangzhou Women and Children's Medical Center, Guangzhou 510120, China
| | - J A Lin
- Department of Nephology, Guangzhou Women and Children's Medical Center, Guangzhou 510120, China
| | - H R Chen
- Department of Nephology, Guangzhou Women and Children's Medical Center, Guangzhou 510120, China
| | - Y J Li
- Department of Nephology, Guangzhou Women and Children's Medical Center, Guangzhou 510120, China
| | - X Gao
- Department of Nephology, Guangzhou Women and Children's Medical Center, Guangzhou 510120, China
| | - C X Wang
- Department of Organ Transplantation, First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510120, China
| | - L S Liu
- Department of Organ Transplantation, First Affiliated Hospital of Sun Yat-sen University, Guangzhou 510120, China
| | - X Liao
- Department of Nephology, Guangzhou Women and Children's Medical Center, Guangzhou 510120, China
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Li YP, Chen HR, Gu SY, Ding J, Zhang W, Zhao KX. [Characteristics of Guyton's exaggerated forced duction test (FDT) and torsional FDT in congenital superior oblique palsy]. Zhonghua Yan Ke Za Zhi 2023; 59:535-541. [PMID: 37408424 DOI: 10.3760/cma.j.cn112142-20230417-00153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 07/07/2023]
Abstract
Objective: To investigate the characteristics of Guyton's exaggerated forced duction test (FDT) and torsional FDT in patients with congenital superior oblique palsy (CSOP) and their correlation with clinical features. Methods: This cross-sectional study included single-eye CSOP patients and intermittent exotropia (IXT) patients scheduled for strabismus correction surgery at Tianjin Eye Hospital from September 2021 to March 2022. Prior to surgery, measurements of fovea-disc angle (FDA) and maximum cross-sectional area of the superior oblique muscle (max-CSA) were obtained in both eyes of the patients. The Guyton's exaggerated FDT and torsional FDT were performed intraoperatively to assess the degree of superior oblique muscle relaxation. The characteristics of the two FDT tests and their correlation with vertical strabismus angle, FDA, and max-CSA were analyzed. Statistical analyses were conducted using t-test, ANOVA, Tukey's test, Mann-Whitney U test, and chi-square test. Results: A total of 42 patients (84 eyes) were included in the study, including 19 IXT patients (38 eyes) and 23 CSOP patients (46 eyes, 23 eyes with palsy and 23 eyes without palsy). There were no statistically significant differences in gender composition or age between the IXT and CSOP patients (all P>0.05). The degrees of superior oblique muscle relaxation measured by the Guyton's exaggerated FDT were (-2.52±1.20), (-0.35±0.71), and (-0.03±0.16) for the palsy eye, non-palsy eye, and IXT eyes, respectively, showing significant differences (F=88.10, P<0.001). The torsional FDT measurements yielded external rotation angles of 48.70°±9.67°, 37.39°±5.40°, and 38.95°±2.88° for the palsy eye, non-palsy eye, and IXT eyes, respectively, showing significant differences (F=16.67, P<0.001). There was no statistically significant difference in internal rotation angles (F=2.36, P=0.100). The FDA values were-12.11°±7.42° for IXT patients and-19.02°±4.95° for CSOP patients, while the max-CSA values for the palsy eye and non-palsy eye of CSOP patients were (7.59±4.69) mm² and (11.63±3.64) mm², respectively, all showing significant differences (all P<0.001). The degree of superior oblique muscle tendon relaxation assessed by the Guyton's exaggerated FDT was negatively correlated with the external rotation angle measured by the torsional FDT (r=-0.64, P=0.001). They were positively correlated with max-CSA (r=0.45, P=0.030) and negatively correlated with max-CSA (r=-0.52, P=0.011). However, there was no correlation with vertical and rotational strabismus angle (r=-0.12, P=0.579; r=0.33, P=0.126) and FDA (r=-0.02, P=0.921; r=-0.23, P=0.309). Conclusions: Guyton's exaggerated FDT and torsional FDT can both assess the degree of superior oblique muscle relaxation in patients with CSOP. Furthermore, these two tests are correlated with changes in superior oblique muscle morphology. However, FDT cannot reflect the degree of vertical and rotational strabismus in patients.
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Affiliation(s)
- Y P Li
- Tianjin Eye Hospital, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology of Tianjin Medical University, Tianjin Eye Institute, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin 300020, China
| | - H R Chen
- Department of Ophthalmology, the First Affiliated Hospital of Zhengzhou University,Zhengzhou 450052, China
| | - S Y Gu
- Tianjin Eye Hospital, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology of Tianjin Medical University, Tianjin Eye Institute, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin 300020, China
| | - J Ding
- Tianjin Eye Hospital, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology of Tianjin Medical University, Tianjin Eye Institute, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin 300020, China
| | - W Zhang
- Tianjin Eye Hospital, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology of Tianjin Medical University, Tianjin Eye Institute, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin 300020, China
| | - K X Zhao
- Tianjin Eye Hospital, Nankai University Affiliated Eye Hospital, Clinical College of Ophthalmology of Tianjin Medical University, Tianjin Eye Institute, Tianjin Key Laboratory of Ophthalmology and Visual Science, Tianjin 300020, China
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Wan Q, Zheng K, Wu J, Bu S, Jiao M, Zhou H, Lu Y, Zheng H, Wu G, Rao S, Chen H, Yan F, Peng J. The Additional 15 nt of 5' UTR in a Novel Recombinant Isolate of Chilli Veinal Mottle Virus in Solanum nigrum L. Is Crucial for Infection. Viruses 2023; 15:1428. [PMID: 37515116 PMCID: PMC10384581 DOI: 10.3390/v15071428] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 06/22/2023] [Accepted: 06/22/2023] [Indexed: 07/30/2023] Open
Abstract
An isolate of chilli veinal mottle virus (ChiVMV; genus Potyvirus) of Solanum nigrum L. from southwest China (ChiVMV-YunN/Yuxi) was identified and sequenced (GenBank: OP404087). Comparison with other ChiVMV isolates and recombination analyses suggested a recombinant origin. The most significant recombination event among all 21 complete ChiVMV isolates was an ending breakpoint at 1408-1488 for ChiVMV-YunN/Yuxi with ChiVMV-TaiW and ChiVMV-YunN/Ca operating as the respective major and minor parents. Interestingly, the 5' UTR of ChiVMV-YunN/Yuxi is 15 nucleotides ('AAAAATAAAACAACC') longer than other reported isolates. A full-length clone of ChiVMV-YunN/Yuxi was constructed and was shown to be infectious in Nicotiana benthamiana. The additional 15 nt of 5' UTR in ChiVMV-YunN/Yuxi was stable when transmitted through three generations. Experiments with modified clones showed that the additional 15 nt are essential for infection by this isolate.
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Affiliation(s)
- Qionglian Wan
- College of Plant Protection, Yunnan Agricultural University, Kunming 650201, China
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
- Key Laboratory of Biotechnology in Plant Protection of MARA and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
- School of Chemistry, Biology and Environment, Yuxi Normal University, Yuxi 653100, China
| | - Kaiyue Zheng
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
- Key Laboratory of Biotechnology in Plant Protection of MARA and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
| | - Jian Wu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
- Key Laboratory of Biotechnology in Plant Protection of MARA and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
| | - Shan Bu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
- Key Laboratory of Biotechnology in Plant Protection of MARA and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
| | - Mengting Jiao
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
- Key Laboratory of Biotechnology in Plant Protection of MARA and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
| | - Huijie Zhou
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
- Key Laboratory of Biotechnology in Plant Protection of MARA and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
| | - Yuwen Lu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
- Key Laboratory of Biotechnology in Plant Protection of MARA and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
| | - Hongying Zheng
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
- Key Laboratory of Biotechnology in Plant Protection of MARA and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
| | - Guanwei Wu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
- Key Laboratory of Biotechnology in Plant Protection of MARA and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
| | - Shaofei Rao
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
- Key Laboratory of Biotechnology in Plant Protection of MARA and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
| | - Hairu Chen
- College of Plant Protection, Yunnan Agricultural University, Kunming 650201, China
| | - Fei Yan
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
- Key Laboratory of Biotechnology in Plant Protection of MARA and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
| | - Jiejun Peng
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
- Key Laboratory of Biotechnology in Plant Protection of MARA and Zhejiang Province, Institute of Plant Virology, Ningbo University, Ningbo 315211, China
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Yang M, Qi Y, Liu J, Gao P, Huang F, Yu L, Chen H. Different Response Mechanisms of Rhizosphere Microbial Communities in Two Species of Amorphophallus to Pectobacterium carotovorum subsp. carotovorum Infection. Plant Pathol J 2023; 39:207-219. [PMID: 37019830 PMCID: PMC10102568 DOI: 10.5423/ppj.oa.12.2022.0157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 01/31/2023] [Accepted: 02/03/2023] [Indexed: 06/19/2023]
Abstract
Soft rot is a widespread, catastrophic disease caused by Pectobacterium carotovorum subsp. carotovorum (Pcc) that severely damages the production of Amorphophallus spp. This study evaluated the rhizosphere bacterial and fungal communities in Pcc-infected and uninfected plants of two species of Amorphophallus, A. muelleri and A. konjac. Principal component analysis showed that the samples formed different clusters according to the Pcc infection status, indicating that Pcc infection can cause a large number of changes in the bacterial and fungal communities in the Amorphophallus spp. rhizosphere soil. However, the response mechanisms of A. muelleri and A. konjac are different. There was little difference in the overall microbial species composition among the four treatments, but the relative abundances of core microbiome members were significantly different. The relative abundances of Actinobacteria, Chloroflexi, Acidobacteria, Firmicutes, Bacillus, and Lysobacter were lower in infected A. konjac plants than in healthy plants; in contrast, those of infected A. muelleri plants were higher than those in healthy plants. For fungi, the relative abundances of Ascomycota and Fusarium in the rhizosphere of infected A. konjac plants were significantly higher than those of healthy plants, but those of infected A. muelleri plants were lower than those of healthy plants. The relative abundance of beneficial Penicillium fungi was lower in infected A. konjac plants than in healthy plants, and that of infected A. muelleri plants was higher than that of healthy plants. These findings can provide theoretical references for further functional research and utilization of Amorphophallus spp. rhizosphere microbial communities in the future.
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Affiliation(s)
- Min Yang
- College of Plant Protection, Yunnan Agricultural University, Kunming 650201,
China
- College of Agronomy, Yunnan Urban Agricultural Engineering and Technological Research Center, Kunming University, Kunming 650214,
China
| | - Ying Qi
- College of Agronomy, Yunnan Urban Agricultural Engineering and Technological Research Center, Kunming University, Kunming 650214,
China
| | - Jiani Liu
- College of Agronomy, Yunnan Urban Agricultural Engineering and Technological Research Center, Kunming University, Kunming 650214,
China
| | - Penghua Gao
- College of Agronomy, Yunnan Urban Agricultural Engineering and Technological Research Center, Kunming University, Kunming 650214,
China
| | - Feiyan Huang
- College of Agronomy, Yunnan Urban Agricultural Engineering and Technological Research Center, Kunming University, Kunming 650214,
China
| | - Lei Yu
- College of Agronomy, Yunnan Urban Agricultural Engineering and Technological Research Center, Kunming University, Kunming 650214,
China
| | - Hairu Chen
- College of Plant Protection, Yunnan Agricultural University, Kunming 650201,
China
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Hua M, Jiang S, Yuan E, Wan Q, Wang L, Lu Y, Zheng H, Chen H, Chen J, Yan F, Wang S, Peng J. Construction of an infectious full-length and eGFP-tagged cDNA clone of a chilli ringspot virus isolate from Yunnan province, China. Arch Virol 2022; 167:1583-1587. [PMID: 35567696 DOI: 10.1007/s00705-022-05457-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 03/21/2022] [Indexed: 11/02/2022]
Abstract
Chilli ringspot virus (ChiRSV; genus Potyvirus) was one of several viruses previously detected in pepper samples with severe yellowing and curling symptoms growing in Wenshan, Yunan province, China. We now report the full-length sequence of ChiRSV-YN/Wenshan (MZ269480), which has 88.5-98.9% nucleotide sequence identity to other published ChiRSV isolates. A full-length cDNA infectious clone was constructed. This cDNA and an eGFP-tagged clone were infectious, leading to systemic symptoms in both Nicotiana benthamiana and Capsicum spp. Recombinant clones containing the P1 protein coding region of other ChiRSV isolates differed in their pathogenicity. Single infection by ChiRSV caused mild mosaic or leaf crinkling in Capsicum frutescens L. and Capsicum annuum L.
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Affiliation(s)
- Mengying Hua
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Shanshan Jiang
- Shandong Provincial Key Laboratory of Plant Virology, Institute of Plant Protection, Shandong Academy of Agricultural Sciences, Jinan, 250100, Shandong, China
| | - Enping Yuan
- Wenshan Academy of Agricultural Sciences, Wenshan, 663000, Yunnan, China
| | - Qionglian Wan
- College of Plant Protection, Yunnan Agricultural University, Kunming, 650201, Yunnan, China
| | - Liyan Wang
- Shandong Provincial Key Laboratory of Plant Virology, Institute of Plant Protection, Shandong Academy of Agricultural Sciences, Jinan, 250100, Shandong, China
| | - Yuwen Lu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Hongying Zheng
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Hairu Chen
- College of Plant Protection, Yunnan Agricultural University, Kunming, 650201, Yunnan, China
| | - Jianping Chen
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Fei Yan
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Shaoxiang Wang
- Wenshan Academy of Agricultural Sciences, Wenshan, 663000, Yunnan, China.
| | - Jiejun Peng
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo, 315211, Zhejiang, China.
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Chen X, Luo H, Zhang J, Ma Y, Li K, Xiong F, Yang Y, Yang J, Lan P, Wei T, Xu Y, Chen H, Li F. Synergism Among the Four Tobacco Bushy Top Disease Casual Agents in Symptom Induction and Aphid Transmission. Front Microbiol 2022; 13:846857. [PMID: 35444628 PMCID: PMC9014100 DOI: 10.3389/fmicb.2022.846857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 03/01/2022] [Indexed: 11/13/2022] Open
Abstract
Tobacco bushy top disease (TBTD), caused by multiple pathogens including tobacco bushy top virus (TBTV), tobacco vein distorting virus (TVDV), TBTV satellite RNA (TBTVsatRNA), and TVDV-associated RNA (TVDVaRNA), is a destructive disease in tobacco fields. To date, how these causal agents are co-transmitted by aphid vectors in field and their roles in disease symptom induction remain largely unknown, due mainly to the lack of purified causal agents. In this study, we have constructed four full-length infectious clones, representing the Yunnan Kunming isolates of TVDV, TBTV, TBTVsatRNA, and TVDVaRNA (TVDV-YK, TBTV-YK, TBTVsatRNA-YK, and TVDVaRNA-YK), respectively. Co-inoculation of these four causal agents to tobacco K326 plants caused typical TBTD symptoms, including smaller leaves, necrosis, and plant stunting. In addition, inoculation of tobacco K326 plants with TBTV alone caused necrosis in systemic leaves by 7 dpi. Tobacco K326 and Nicotiana benthamiana plants infected by single virus or multiple viruses showed very different disease symptoms at various dpi. RT-PCR results indicated that co-infection of TVDVaRNA-YK could increase TVDV-YK or TBTV-YK accumulation in N. benthamiana plants, suggesting that TVDVaRNA-YK can facilitate TVDV-YK and TBTV-YK replication and/or movement in the infected plants. Aphid transmission assays showed that the successful transmission of TBTV-YK, TBTVsatRNA-YK, and TVDVaRNA-YK by Myzus persicae depended on the presence of TVDV-YK, while the presence of TBTVsatRNA-YK increased the aphid transmission efficiency of TBTV and TVDV. We consider that these four new infectious clones will allow us to further dissect the roles of these four causal agents in TBTD induction as well as aphid transmission.
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Affiliation(s)
- Xiaojiao Chen
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
| | - Hengming Luo
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
| | - Jingyi Zhang
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
| | - Yan Ma
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
| | - Kehua Li
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
| | - Feng Xiong
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
| | - Yahui Yang
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
| | - Jiazhen Yang
- Key Laboratory of Agricultural Biotechnology of Yunnan Province, Institute of Biotechnology and Germplasm Resources, Yunnan Academy of Agricultural Sciences, Kunming, China
| | - Pingxiu Lan
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
| | - Taiyun Wei
- Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Yi Xu
- Department of Plant Pathology, Nanjing Agricultural University, Nanjing, China
| | - Hairu Chen
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
| | - Fan Li
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, China
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Zhang Y, Xu H, Liu Y, Kang J, Chen H, Wang Z, Cai D. Case Report: Fascioliasis Hepatica Precisely Diagnosed by Metagenomic Next-Generation Sequencing and Treated With Albendazole. Front Med (Lausanne) 2021; 8:773145. [PMID: 34901089 PMCID: PMC8651557 DOI: 10.3389/fmed.2021.773145] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 10/26/2021] [Indexed: 11/13/2022] Open
Abstract
The clinical manifestations of fascioliasis hepatica in humans are unspecific. Traditional diagnosis relies on evidence of live parasites or eggs in the bile or feces. However, due to similar imaging manifestations, they are often misdiagnosed as malignant tumors. Here, we report a case of a 43-year-old woman with fever and space-occupying liver disease. Liver biopsy, parasite-specific antibody screening, and stool testing did not find any pathogens. Therefore, metagenomic next-generation sequencing (mNGS) and routine microbiological examinations were performed. Finally, Fasciola hepatica was only identified by mNGS. The body temperature of the patient and the eosinophil count remained normal, and the space-occupying liver lesions were significantly absorbed after more than 7 months of treatment with albendazole. The details of this case highlight the timely use of mNGS to identify parasites and judge therapeutic effects after treatment, providing important help for clinical decision-making.
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Affiliation(s)
- Yaling Zhang
- Department of Infectious Diseases, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Huan Xu
- Vision Medicals Center for Infection Diseases, Guangzhou, China
| | - Yi Liu
- Department of Infectious Diseases, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Juan Kang
- Department of Infectious Diseases, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Hairu Chen
- Vision Medicals Center for Infection Diseases, Guangzhou, China
| | - Zhiyi Wang
- Department of Infectious Diseases, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Dachuan Cai
- Department of Infectious Diseases, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
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Peng J, Bu S, Yin Y, Hua M, Zhao K, Lu Y, Zheng H, Wan Q, Zhang S, Chen H, Liu Y, Chen J, Mo X, Yan F. Biological and Genetic Characterization of Pod Pepper Vein Yellows Virus-Associated RNA From Capsicum frutescens in Wenshan, China. Front Microbiol 2021; 12:662352. [PMID: 33936020 PMCID: PMC8083956 DOI: 10.3389/fmicb.2021.662352] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2021] [Accepted: 03/19/2021] [Indexed: 11/13/2022] Open
Abstract
Tombusvirus-like associated RNAs (tlaRNAs) are positive-sense single-stranded RNAs found in plants co-infected with some viruses of the genus Polerovirus. Pod pepper vein yellows virus (PoPeVYV) was recently reported as a new recombinant polerovirus causing interveinal yellowing, stunting, and leaf rolling in Capsicum frutescens plants at Wenshan city, Yunnan province, China. The complete genome sequence of its associated RNA has now been determined by next-generation sequencing and reverse transcription (RT) polymerase chain reaction (PCR). PoPeVYV-associated RNA (PoPeVYVaRNA) (GenBank Accession No. MW323470) has 2970 nucleotides and is closely related to other group II tlaRNAs, particularly tobacco bushy top disease-associated RNA (TBTDaRNA, GenBank Accession No. EF529625). In infection experiments on Nicotiana benthamiana and C. frutescens plants, synergism between PoPeVYVaRNA and PoPeVYV was demonstrated, leading to severe interveinal yellowing of leaves and stunting of plants. The results provide further information on the genetic and biological properties of the various agents associated with pepper vein yellows disease (PeVYD).
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Affiliation(s)
- Jiejun Peng
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo, China
| | - Shan Bu
- Key Laboratory of Pest Management of Horticultural Crop of Hunan Province, Hunan Plant Protection Institute, Hunan Academy of Agricultural Sciences, Changsha, China.,Longping Branch of Graduate College, Hunan University, Changsha, China
| | - Yueyan Yin
- College of Plant Protection, Yunnan Agricultural University, Kunming, China.,Institute of Alpine Economic Plants, Yunnan Academy of Agricultural Sciences, Lijiang, China
| | - Mengying Hua
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo, China
| | - Kuangjie Zhao
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo, China
| | - Yuwen Lu
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo, China
| | - Hongying Zheng
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo, China
| | - Qionglian Wan
- College of Plant Protection, Yunnan Agricultural University, Kunming, China
| | - Songbai Zhang
- Key Laboratory of Pest Management of Horticultural Crop of Hunan Province, Hunan Plant Protection Institute, Hunan Academy of Agricultural Sciences, Changsha, China
| | - Hairu Chen
- College of Plant Protection, Yunnan Agricultural University, Kunming, China
| | - Yong Liu
- Key Laboratory of Pest Management of Horticultural Crop of Hunan Province, Hunan Plant Protection Institute, Hunan Academy of Agricultural Sciences, Changsha, China
| | - Jianping Chen
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo, China
| | - Xiaohan Mo
- Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
| | - Fei Yan
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo, China
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Zhao K, Yin Y, Hua M, Wang S, Mo X, Yuan E, Zheng H, Lin L, Chen H, Lu Y, Chen J, Peng J, Yan F. Pod pepper vein yellows virus, a new recombinant polerovirus infecting Capsicum frutescens in Yunnan province, China. Virol J 2021; 18:42. [PMID: 33622354 PMCID: PMC7901092 DOI: 10.1186/s12985-021-01511-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 02/08/2021] [Indexed: 12/02/2022] Open
Abstract
Pepper vein yellows viruses (PeVYV) are phloem-restricted viruses in the genus Polerovirus, family Luteoviridae. Typical viral symptoms of PeVYV including interveinal yellowing of leaves and upward leaf curling were observed in pod pepper plants (Capsicum frutescens) growing in Wenshan city, Yunnan province, China. The complete genome sequence of a virus from a sample of these plants was determined by next-generation sequencing and RT-PCR. Pod pepper vein yellows virus (PoPeVYV) (MT188667) has a genome of 6015 nucleotides, and the characteristic genome organization of a member of the genus Polerovirus. In the 5′ half of its genome (encoding P0 to P4), PoPeVYV is most similar (93.1% nt identity) to PeVYV-3 (Pepper vein yellows virus 3) (KP326573) but diverges greatly in the 3′-part encoding P5, where it is most similar (91.7% nt identity) to tobacco vein distorting virus (TVDV, EF529624) suggesting a recombinant origin. Recombination analysis predicted a single recombination event affecting nucleotide positions 4126 to 5192 nt, with PeVYV-3 as the major parent but with the region 4126–5192 nt derived from TVDV as the minor parent. A full-length clone of PoPeVYV was constructed and shown to be infectious in C. frutescens by RT-PCR and the presence of icosahedral viral particles.
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Affiliation(s)
- Kuangjie Zhao
- State Key Laboratory for Managing Biotic and Chemical Threats To the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Yueyan Yin
- Institute of Alpine Economic Plants, Yunnan Academy of Agricultural Sciences, Lijiang, 674100, Yunnan, China.,College of Plant Protection, Yunnan Agricultural University, Kunming, 650201, Yunnan, China
| | - Mengying Hua
- State Key Laboratory for Managing Biotic and Chemical Threats To the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Shaoxiang Wang
- Wenshan Academy of Agricultural Sciences, Wenshan, 663000, Yunnan, China
| | - Xiaohan Mo
- Yunnan Academy of Tobacco Agricultural Sciences, Kunming, 650021, Yunnan, China
| | - Enping Yuan
- Wenshan Academy of Agricultural Sciences, Wenshan, 663000, Yunnan, China
| | - Hongying Zheng
- State Key Laboratory for Managing Biotic and Chemical Threats To the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Lin Lin
- State Key Laboratory for Managing Biotic and Chemical Threats To the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Hairu Chen
- College of Plant Protection, Yunnan Agricultural University, Kunming, 650201, Yunnan, China
| | - Yuwen Lu
- State Key Laboratory for Managing Biotic and Chemical Threats To the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Jianping Chen
- State Key Laboratory for Managing Biotic and Chemical Threats To the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo, 315211, Zhejiang, China
| | - Jiejun Peng
- State Key Laboratory for Managing Biotic and Chemical Threats To the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo, 315211, Zhejiang, China.
| | - Fei Yan
- State Key Laboratory for Managing Biotic and Chemical Threats To the Quality and Safety of Agroproducts, Institute of Plant Virology, Ningbo University, Ningbo, 315211, Zhejiang, China.
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Chen XM, Cao F, Zhang HM, Chen HR, Zhang JD, Zhi P, Li ZY, Wang YX, Lu XC. [Exploration of omics mechanism and drug prediction of coronavirus-induced heart failure based on clinical bioinformatics]. Zhonghua Xin Xue Guan Bing Za Zhi 2020; 48:587-592. [PMID: 32228827 DOI: 10.3760/cma.j.cn112148-20200308-00172] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: Present study investigated the mechanism of heart failure associated with coronavirus infection and predicted potential effective therapeutic drugs against heart failure associated with coronavirus infection. Methods: Coronavirus and heart failure were searched in the Gene Expression Omnibus (GEO) and omics data were selected to meet experimental requirements. Differentially expressed genes were analyzed using the Limma package in R language to screen for differentially expressed genes. The two sets of differential genes were introduced into the R language cluster Profiler package for gene ontology (GO) and Kyoto gene and genome encyclopedia (KEGG) pathway enrichment analysis. Two sets of intersections were taken. A protein interaction network was constructed for all differentially expressed genes using STRING database and core genes were screened. Finally, the apparently accurate treatment prediction platform (EpiMed) independently developed by the team was used to predict the therapeutic drug. Results: The GSE59185 coronavirus data set was searched and screened in the GEO database, and divided into wt group, ΔE group, Δ3 group, Δ5 group according to different subtypes, and compared with control group. After the difference analysis, 191 up-regulated genes and 18 down-regulated genes were defined. The GEO126062 heart failure data set was retrieved and screened from the GEO database. A total of 495 differentially expressed genes were screened, of which 165 were up-regulated and 330 were down-regulated. Correlation analysis of differentially expressed genes between coronavirus and heart failure was performed. After cross processing, there were 20 GO entries, which were mainly enriched in virus response, virus defense response, type Ⅰ interferon response, γ interferon regulation, innate immune response regulation, negative regulation of virus life cycle, replication regulation of viral genome, etc. There were 5 KEGG pathways, mainly interacting with tumor necrosis factor (TNF) signaling pathway, interleukin (IL)-17 signaling pathway, cytokine and receptor interaction, Toll-like receptor signaling pathway, human giant cells viral infection related. All differentially expressed genes were introduced into the STRING online analysis website for protein interaction network analysis, and core genes such as signal transducer and activator of transcription 3, IL-10, IL17, TNF, interferon regulatory factor 9, 2'-5'-oligoadenylate synthetase 1, mitogen-activated protein kinase 3, radical s-adenosyl methionine domain containing 2, c-x-c motif chemokine ligand 10, caspase 3 and other genes were screened. The drugs predicted by EpiMed's apparent precision treatment prediction platform for disease-drug association analysis were mainly TNF-α inhibitors, resveratrol, ritonavir, paeony, retinoic acid, forsythia, and houttuynia cordata. Conclusions: The abnormal activation of multiple inflammatory pathways may be the cause of heart failure in patients after coronavirus infection. Resveratrol, ritonavir, retinoic acid, amaranth, forsythia, houttuynia may have therapeutic effects. Future basic and clinical research is warranted to validate present results and hypothesis.
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Affiliation(s)
- X M Chen
- National Medical Center for Geriatric Diseases, Department of Hematology, Second Medical Center, General Hospital of Chinese People's Liberation Army, Beijing 100853, China
| | - F Cao
- National Medical Center for Geriatric Diseases, Second Medical Center, General Hospital of Chinese People's Liberation Army, Beijing 100853, China
| | - H M Zhang
- National Medical Center for Geriatric Diseases, Department of Hematology, Second Medical Center, General Hospital of Chinese People's Liberation Army, Beijing 100853, China
| | - H R Chen
- School of Management, Shanxi Medical University, Taiyuan 030001, China
| | - J D Zhang
- Graduate School of Medical College of Chinese People's Liberation Army, Beijing 100853, China
| | - P Zhi
- School of Management, Shanxi Medical University, Taiyuan 030001, China
| | - Z Y Li
- School of Management, Shanxi Medical University, Taiyuan 030001, China
| | - Y X Wang
- Department of Traditional Chinese Medicine, Dongfang Hospital Affiliated to Tongji University, Shanghai 200120, China
| | - X C Lu
- National Medical Center for Geriatric Diseases, Department of Hematology, Second Medical Center, General Hospital of Chinese People's Liberation Army, Beijing 100853, China
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Xia SJ, Chen HR, Li Z, Li XC, Zhi EL, Tian RH, Li P, Huang YH, Hu JL, Qiu Y. [Efficacy and safety of low-intensity pulsed ultrasound at different intervals by mechanical force in treating erectile dysfunction: a preliminary study]. Zhonghua Yi Xue Za Zhi 2020; 100:1432-1436. [PMID: 32392996 DOI: 10.3760/cma.j.cn112137-20191207-02679] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To study the efficacy and safety of low-intensity pulsed ultrasound (LIPUS) at different intervals by mechanical force in treating erectile dysfunction (ED). Method: Forty patients with mild to moderate ED were randomized in a 1∶1 ratio to receive 16-treatment sessions of LIPUS in group A and group B, applied 3 times per week and 2 times per week, respectively. End-point assessments were made at 8th week after treatment. Efficacy were evaluated using International Index of Erectile Function-Erectile Function domain score (IIEF-EF), Erectile Hardness Score (EHS), Self-Esteem and Relationship Questionnaire (SEAR), Sexual Encounter Profile (SEP), Global Assessment Question (GAQ), and pain were assessed by Visual Analogue Score (VAS).Treatment response was confirmed by a minimal clinically importance difference (MCID) at 8th week. Results: Compared with baseline, IIEF-EF score [(17.1±5.48 vs 23.4±3.75, P<0.05) and (18.9±4.34 vs 24.1±4.32, P<0.05)], proportion of EHS 4 [(0 vs 40%, P<0.05) and (16.7% vs 55.6%, P<0.05)], and Overall Relationship score [(50.6 vs 67.5, P<0.05) and (44.4 vs 70.1, P<0.05)] were significantly improved at 8th week in two groups, respectively. Compared with baseline, the positive responses to SEP-3 increased significantly at 8th week in two groups (50.0% vs 80.0%,P<0.05) and (44.4% vs 88.9%, P<0.05), respectively. The positive responses to GAQ-2 were 90.0% and 88.9% at 8th week in two groups, respectively. There were no significant differences in IIEF-EF, EHS, SEAR, SEP and GAQ at 8th week between two groups. There was no significant difference in treatment response using MCID between two groups at end-point (80.5% vs 77.5%). The treatment duration for full sessions were 2.5 weeks less in group A than group B. No adverse effects were reported in all cases. Conclusion: LIPUS at two different intervals is effective and safe for mild to moderate ED, and the regimen at 3 times per week can achieve quite good effect in relatively short duration,while the long-term effects is still be clarified in further study.
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Affiliation(s)
- S J Xia
- Urologic Medical Center, Institute of Urology, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai 200080, China
| | - H R Chen
- Urologic Medical Center, Institute of Urology, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai 200080, China
| | - Z Li
- Urologic Medical Center, Institute of Urology, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai 200080, China
| | - X C Li
- Clinical Research Center, Shanghai General Hospital, Shanghai 200080, China
| | - E L Zhi
- Urologic Medical Center, Institute of Urology, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai 200080, China
| | - R H Tian
- Urologic Medical Center, Institute of Urology, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai 200080, China
| | - P Li
- Urologic Medical Center, Institute of Urology, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai 200080, China
| | - Y H Huang
- Urologic Medical Center, Institute of Urology, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai 200080, China
| | - J L Hu
- Urologic Medical Center, Institute of Urology, Shanghai General Hospital, Shanghai Jiao Tong University, Shanghai 200080, China
| | - Y Qiu
- Clinical Research Center, Shanghai General Hospital, Shanghai 200080, China
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Zheng Z, Chen H, Xie P, Dickerson CA, King JAC, Alexeyev MF, Wu S. α 1G T-type calcium channel determines the angiogenic potential of pulmonary microvascular endothelial cells. Am J Physiol Cell Physiol 2019; 316:C353-C364. [PMID: 30649917 DOI: 10.1152/ajpcell.00336.2018] [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] [Indexed: 11/22/2022]
Abstract
Pulmonary microvascular endothelial cells (PMVECs) display a rapid angioproliferative phenotype, essential for maintaining homeostasis in steady-state and promoting vascular repair after injury. Although it has long been established that endothelial cytosolic Ca2+ ([Ca2+]i) transients are required for proliferation and angiogenesis, mechanisms underlying such regulation and the transmembrane channels mediating the relevant [Ca2+]i transients remain incompletely understood. In the present study, the functional role of the microvascular endothelial site-specific α1G T-type Ca2+ channel in angiogenesis was examined. PMVECs intrinsically possess an in vitro angiogenic "network formation" capacity. Depleting extracellular Ca2+ abolishes network formation, whereas blockade of vascular endothelial growth factor receptor or nitric oxide synthase has little or no effect, suggesting that the network formation is a [Ca2+]i-dependent process. Blockade of the T-type Ca2+ channel or silencing of α1G, the only voltage-gated Ca2+ channel subtype expressed in PMVECs, disrupts network formation. In contrast, blockade of canonical transient receptor potential (TRP) isoform 4 or TRP vanilloid 4, two other Ca2+ permeable channels expressed in PMVECs, has no effect on network formation. T-type Ca2+ channel blockade also reduces proliferation, cell-matrix adhesion, and migration, three major components of angiogenesis in PMVECs. An in vivo study demonstrated that the mice lacking α1G exhibited a profoundly impaired postinjury cell proliferation in the lungs following lipopolysaccharide challenge. Mechanistically, T-type Ca2+ channel blockade reduces Akt phosphorylation in a dose-dependent manner. Blockade of Akt or its upstream activator, phosphatidylinositol-3-kinase (PI3K), also impairs network formation. Altogether, these findings suggest a novel functional role for the α1G T-type Ca2+ channel to promote the cell's angiogenic potential via a PI3K-Akt signaling pathway.
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Affiliation(s)
- Zhen Zheng
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham , Birmingham, Alabama
| | - Hairu Chen
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham , Birmingham, Alabama
| | - Peilin Xie
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham , Birmingham, Alabama
| | - Carol A Dickerson
- Department of Anesthesiology and Perioperative Medicine, Medical College of Georgia, Augusta University , Augusta, Georgia
| | - Judy A C King
- Department of Pathology and Translational Pathobiology, Louisiana State University Health Sciences Center , Shreveport, Louisiana
| | - Mikhail F Alexeyev
- Center for Lung Biology and Department of Physiology and Cell Biology, University of South Alabama , Mobile, Alabama
| | - Songwei Wu
- Department of Anesthesiology and Perioperative Medicine, University of Alabama at Birmingham , Birmingham, Alabama
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Chen M, Lyu LX, Chen HR, Wang WY, Tang Y. [Application of Metafer4 digital imaging system in fluorescent in situ hybridization counting]. Zhonghua Bing Li Xue Za Zhi 2018; 47:792-794. [PMID: 30317739 DOI: 10.3760/cma.j.issn.0529-5807.2018.10.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
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14
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Gong C, Fang J, Shan J, Duan XN, Hu JJ, Chen HR, Zhang JJ, Wan YH, Sun Y. [Prospective association between childhood abuse experiences and depressive symptoms in adolescence]. Zhonghua Liu Xing Bing Xue Za Zhi 2018; 39:1184-1187. [PMID: 30293307 DOI: 10.3760/cma.j.issn.0254-6450.2018.09.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the prospective association between childhood abuse experiences and depressive symptoms in adolescence. Methods: Students in grade 3 and 4 from three primary schools were selected, with informed consent, through convenience cluster sampling in Bengbu, Anhui province in May 2013. The students' body height, weight were assessed. Childhood abuse experiences including emotional, physical or sexual abuses, as well as depressive symptoms were reported by children themselves. Data on parental educational background and household economic status were collected through parent questionnaire. A follow up was conducted 4 years later after baseline survey. Depressive symptoms were evaluated by using Children's Depression Inventory at baseline survey, and by using Mood and Feeling Questionnaire at follow-up. Logistic regression model was used to analyze the relationship between childhood abuse experiences and depressive symptoms in adolescence. Results: A total of 1 172 students were included in baseline survey, and a follow-up was conducted for 87.1% of them (n=1 021). Among 1 126 students with complete information on childhood abuse experiences at baseline survey, the reported rates of physical, emotional and sexual abuses were 12.8% (144/1 126), 11.1% (125/1 126) and 10.9% (123/1 126), respectively. The prevalence of depressive symptoms at baseline survey and follow-up was 7.0% (82/1 172) and 12.3% (126/1 021), respectively. After adjusted for baseline depressive symptoms, age at follow-up, sex, the only-child in family, household economic status, divorce of parents and BMI, childhood emotional and physical abuse experiences were significant risk factors for depressive symptoms in mid-adolescence, with the ORs were 1.86 (95%CI: 1.03-3.36, P=0.039) and 2.37 (95%CI: 1.39-4.03, P=0.001), respectively. Conclusion: Childhood physical and emotional abuse might increase the risk of depressive symptoms in adolescence.
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Affiliation(s)
- C Gong
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, Hefei 230032, China
| | - J Fang
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, Hefei 230032, China
| | - J Shan
- Bengbu Gaoxin Experimental School, Bengbu 233000, China
| | - X N Duan
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, Hefei 230032, China
| | - J J Hu
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, Hefei 230032, China
| | - H R Chen
- Chinese Journal of School Health, Bengbu 233000, China
| | - J J Zhang
- The First Affiliated Hospital of University of Science and Technology of China, Hefei 230000, China
| | - Y H Wan
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, Hefei 230032, China
| | - Y Sun
- Department of Maternal, Child and Adolescent Health, School of Public Health, Anhui Medical University, Hefei 230032, China
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Ma Y, Tan ST, Liu QL, Li YY, Chen XJ, Chen HR, Li F. First Report of Tobacco vein distorting virus Infecting Eupatorium adenophorum in China. Plant Dis 2018; 102:PDIS12172021PDN. [PMID: 30086246 DOI: 10.1094/pdis-12-17-2021-pdn] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Affiliation(s)
- Y Ma
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming 650201, China
| | - S T Tan
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming 650201, China
| | - Q L Liu
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming 650201, China
| | - Y Y Li
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming 650201, China
| | - X J Chen
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming 650201, China
| | - H R Chen
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming 650201, China
| | - F Li
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming 650201, China
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Lan P, Meng Y, Shen P, Li R, Ma Y, Tan S, Chen H, Cao M, Li F. Complete genome sequence of yam chlorotic necrosis virus, a novel macluravirus infecting yam. Arch Virol 2018; 163:2275-2278. [PMID: 29680924 DOI: 10.1007/s00705-018-3851-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 04/11/2018] [Indexed: 11/24/2022]
Abstract
The complete genome sequence of a novel member of the genus Macluravirus was determined from yam plants with chlorotic and necrotic symptoms in China. The genomic RNA consists of 8,261 nucleotides (nt) excluding the 3'-terminal poly(A) tail, containing one long open reading frame (ORF) encoding a large putative polyprotein of 2,627 amino acids. Its genomic structure is typical of macluraviruses, which lack the P1 protein, N-terminal HC-Pro, and D-A-G motif for aphid transmission that are found in potyviruses. The virus shares 56.3-63.8% sequence identity at the genome sequence level and 49.7-63.9% at the polyprotein sequence level with other members of the genus Macluravirus. Phylogenetic analysis based on the complete polyprotein sequence of representative members of the family Potyviridae clearly places the virus within the genus Macluravirus. These results suggest that the virus, tentatively named "yam chlorotic necrosis virus" (YCNV), should be considered a member of a novel species in the genus Macluravirus.
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Affiliation(s)
- Pingxiu Lan
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, 650201, China.,College of Animal Science and Technology, Yunnan Agricultural University, Kunming, 650201, China
| | - Yu Meng
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, 650201, China
| | - Pan Shen
- National Citrus Engineering Research Center, Citrus Research Institute, Southwest University, Chongqing, 400712, China
| | - Ruhui Li
- USDA-ARS, National Germplasm Resources Laboratory, Beltsville, MD, 20705, USA
| | - Yan Ma
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, 650201, China
| | - Songtao Tan
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, 650201, China
| | - Hairu Chen
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, 650201, China
| | - Mengji Cao
- National Citrus Engineering Research Center, Citrus Research Institute, Southwest University, Chongqing, 400712, China.
| | - Fan Li
- State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, 650201, China.
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Zhao L, Dong J, Hu Z, Li S, Su X, Zhang J, Yin Y, Xu T, Zhang Z, Chen H. Anti-TMV activity and functional mechanisms of two sesquiterpenoids isolated from Tithonia diversifolia. Pestic Biochem Physiol 2017; 140:24-29. [PMID: 28755690 DOI: 10.1016/j.pestbp.2017.05.009] [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] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 03/30/2017] [Accepted: 05/30/2017] [Indexed: 05/28/2023]
Abstract
Unlike chemical pesticides, antiviral plants are biodegradable, replenishable and safe. In this study, 14 sesquiterpene compounds from Tithonia diversifolia were tested for their activities against Tobacco mosaic virus (TMV) using the half-leaf method. Tagitinin C (Ses-2) and 1β-methoxydiversifolin-3-0-methyl ether (Ses-5) were found to have in vivo curative activities of 62.86% and 60.27% respectively, at concentrations of 100μg/mL, respectively. In contrast, the in vivo curative inhibition rate of control agent ningnanmycin was 52.48%. Indirect enzyme-linked immunosorbent assay (ID-ELISA) also verified Ses-2 and Ses-5 had higher inhibition activities than the control agent ningnanmycin. Additionally, qRT-PCR showed that both Ses-2 and Ses-5 can partly inhibit the expression of CP and RdRp, two genes that play key roles in TMV infection. When TMV started to systemically spread, Ses-2 inhibited CP expression while Ses-5 inhibited RdRp expression. These results suggest that the two bio-agents have anti-TMV activities and may be used as bio-pesticides to control the plant virus.
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Affiliation(s)
- Lihua Zhao
- College of Plant Protection, Yunnan Agricultural University, Kunming 650201, China; The Institute of Biotechnology and Germplasm Resources, Yunnan Academy of Agricultural Sciences, Kunming 650204, China
| | - Jiahong Dong
- The Institute of Biotechnology and Germplasm Resources, Yunnan Academy of Agricultural Sciences, Kunming 650204, China
| | - Zhonghui Hu
- Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, China
| | - Shunlin Li
- Kunming Institute of Botany, Chinese Academy of Science, Kunming 650201, China
| | - Xiaoxia Su
- The Institute of Biotechnology and Germplasm Resources, Yunnan Academy of Agricultural Sciences, Kunming 650204, China
| | - Jie Zhang
- The Institute of Biotechnology and Germplasm Resources, Yunnan Academy of Agricultural Sciences, Kunming 650204, China
| | - Yueyan Yin
- The Institute of Biotechnology and Germplasm Resources, Yunnan Academy of Agricultural Sciences, Kunming 650204, China
| | - Tao Xu
- The Institute of Biotechnology and Germplasm Resources, Yunnan Academy of Agricultural Sciences, Kunming 650204, China
| | - Zhongkai Zhang
- The Institute of Biotechnology and Germplasm Resources, Yunnan Academy of Agricultural Sciences, Kunming 650204, China.
| | - Hairu Chen
- College of Plant Protection, Yunnan Agricultural University, Kunming 650201, China.
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18
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Tong A, Yuan Q, Wang S, Peng J, Lu Y, Zheng H, Lin L, Chen H, Gong Y, Chen J, Yan F. Altered accumulation of osa-miR171b contributes to rice stripe virus infection by regulating disease symptoms. J Exp Bot 2017; 68:4357-4367. [PMID: 28922766 PMCID: PMC5853540 DOI: 10.1093/jxb/erx230] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 06/09/2017] [Indexed: 05/03/2023]
Abstract
Viral infection affects the pattern of plant miRNA expression. It has been presumed that reduction of miR171 and several other miRNAs influences viral symptoms in plants. We here experimentally demonstrate the association of osa-miR171b with rice stripe virus (RSV) symptoms in rice. Inhibition of osa-miR171b caused stunting with reduced chlorophyll content in leaves similar to viral symptoms. Overexpression of osa-miR171b by an artificial miRNA extended vegetative growth and enhanced chlorophyll accumulation in leaves. Tillers were thicker, and panicles were longer with more spikelets in plants overexpressing osa-miR171b than in controls, but there were no differences in tiller numbers. Targets of osa-miR171b, OsSCL6-IIa, OsSCL6-IIb, and OsSCL6-IIc, were respectively up- and down-regulated in plants where osa-miR171b was inhibited or overexpressed. In plants overexpressing osa-miR171b, five positive regulators for heading development, Ehd1, Ehd2, Ehd3, Ehd4, and Hd3a were up-regulated, while the negative regulator Ghd7 was down-regulated. Plants overexpressing osa-miR171b were less susceptible to RSV and virus symptoms were attenuated. Taken together, the results reveal that a reduction of osa-miR171b in RSV-infected rice contributes to RSV symptoms, and provide more insight into the roles of osa-miR171b in rice.
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Affiliation(s)
- Aizi Tong
- The State Key Laboratory Breeding Base for Sustainable Control of Pest and Disease, Key Laboratory of Biotechnology in Plant Protection of MOA of China and Zhejiang Province, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
- College of Plant Protection, Yunnan Agricultural University, Kunming, China
| | - Quan Yuan
- The State Key Laboratory Breeding Base for Sustainable Control of Pest and Disease, Key Laboratory of Biotechnology in Plant Protection of MOA of China and Zhejiang Province, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
- School of Marine Sciences, Ningbo University, Key Laboratory of Applied Marine Biotechnology, Ministry of Education, Ningbo, China
| | - Shu Wang
- The State Key Laboratory Breeding Base for Sustainable Control of Pest and Disease, Key Laboratory of Biotechnology in Plant Protection of MOA of China and Zhejiang Province, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Jiejun Peng
- The State Key Laboratory Breeding Base for Sustainable Control of Pest and Disease, Key Laboratory of Biotechnology in Plant Protection of MOA of China and Zhejiang Province, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Yuwen Lu
- The State Key Laboratory Breeding Base for Sustainable Control of Pest and Disease, Key Laboratory of Biotechnology in Plant Protection of MOA of China and Zhejiang Province, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Hongying Zheng
- The State Key Laboratory Breeding Base for Sustainable Control of Pest and Disease, Key Laboratory of Biotechnology in Plant Protection of MOA of China and Zhejiang Province, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Lin Lin
- The State Key Laboratory Breeding Base for Sustainable Control of Pest and Disease, Key Laboratory of Biotechnology in Plant Protection of MOA of China and Zhejiang Province, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Hairu Chen
- College of Plant Protection, Yunnan Agricultural University, Kunming, China
| | - Yifu Gong
- School of Marine Sciences, Ningbo University, Key Laboratory of Applied Marine Biotechnology, Ministry of Education, Ningbo, China
| | - Jianping Chen
- The State Key Laboratory Breeding Base for Sustainable Control of Pest and Disease, Key Laboratory of Biotechnology in Plant Protection of MOA of China and Zhejiang Province, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Fei Yan
- The State Key Laboratory Breeding Base for Sustainable Control of Pest and Disease, Key Laboratory of Biotechnology in Plant Protection of MOA of China and Zhejiang Province, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
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19
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Liu F, Tan G, Li X, Chen H, Li R, Li F. Simultaneous detection of four causal agents of tobacco bushy top disease by a multiplex one-step RT-PCR. J Virol Methods 2014; 205:99-103. [PMID: 24833121 DOI: 10.1016/j.jviromet.2014.05.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Revised: 04/27/2014] [Accepted: 05/02/2014] [Indexed: 11/16/2022]
Abstract
Tobacco bushy top disease is a complex disease caused by mixed infection of Tobacco bushy top virus (TBTV), Tobacco vein distorting virus (TVDV), satellite RNA of TBTV (Sat-TBTV) and Tobacco vein distorting virus associate RNA (TVDVaRNA). A one-tube multiplex reverse transcription-PCR (RT-PCR) assay was developed for simultaneous detection of the four causal agents of the disease. Four pairs of specific primers based on the conserved regions of each of the four disease agents were used in the one-tube RT-PCR. The RT-PCR products consisted of fragments of 1049 base pairs (bp) for TBTV, 792bp for TVDVaRNA, 598bp for Sat-TBTV and 357bp for TVDV, and their origins were confirmed by sequencing. Primer concentrations and cycling condition were optimized for the multiplex RT-PCR. The detection limit of the assay was up to 10(-4) dilution. The assay was evaluated using tobacco plants infected naturally with one to four target viruses, transmission vector of aphids and field samples collected from Yunnan, Hunan, and Guizhou province, China. The results show that the multiplex RT-PCR is reliable and sensitive as a simple, rapid and cost-effective method to detect these pathogens in tobacco and aphid. This assay will be useful for virus surveys when large numbers of samples are tested.
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Affiliation(s)
- Fang Liu
- Key Laboratory of Agricultural Biodiversity for Pest Management of China Education Ministry, Yunnan Agricultural University, Kunming 650201, China; College of Agriculture and Biotechnology, Yunnan Agricultural University, Kunming 650201, China
| | - Guanlin Tan
- Modern Education Technology Center, Yunnan Agricultural University, Kunming 650201, China
| | - Xiaojing Li
- Key Laboratory of Agricultural Biodiversity for Pest Management of China Education Ministry, Yunnan Agricultural University, Kunming 650201, China
| | - Hairu Chen
- Key Laboratory of Agricultural Biodiversity for Pest Management of China Education Ministry, Yunnan Agricultural University, Kunming 650201, China
| | - Ruhui Li
- USDA-ARS, National Germplasm Resources Laboratory, Beltsville, MD 20705, USA.
| | - Fan Li
- Key Laboratory of Agricultural Biodiversity for Pest Management of China Education Ministry, Yunnan Agricultural University, Kunming 650201, China.
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20
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Abstract
The low-voltage-activated T-type Ca(2+) channels play an important role in mediating the cellular responses to altered oxygen tension. Among three T-type channel isoforms, α1G, α1H, and α1I, only α1H was found to be upregulated under hypoxia. However, mechanisms underlying such hypoxia-dependent isoform-specific gene regulation remain incompletely understood. We, therefore, studied the hypoxia-dependent transcriptional regulation of α1G and α1H gene promoters with the aim to identify the functional hypoxia-response elements (HREs). In rat pulmonary artery smooth muscle cells (PASMCs) and pheochromocytoma (PC12) cells after hypoxia (3% O2) exposure, we observed a prominent increase in α1H mRNA at 12 h along with a significant rise in α1H-mediated T-type current at 24 and 48 h. We then cloned two promoter fragments from the 5'-flanking regions of rat α1G and α1H gene, 2,000 and 3,076 bp, respectively, and inserted these fragments into a luciferase reporter vector. Transient transfection of PASMCs and PC12 cells with these recombinant constructs and subsequent luciferase assay revealed a significant increase in luciferase activity from the reporter containing the α1H, but not α1G, promoter fragment under hypoxia. Using serial deletion and point mutation analysis strategies, we identified a functional HRE at site -1,173cacgc-1,169 within the α1H promoter region. Furthermore, an electrophoretic mobility shift assay using this site as a DNA probe demonstrated an increased binding activity to nuclear protein extracts from the cells after hypoxia exposure. Taken together, these findings indicate that hypoxia-induced α1H upregulation involves binding of hypoxia-inducible factor to an HRE within the α1H promoter region.
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Affiliation(s)
- Hassan Sellak
- Department of Anesthesiology and Perioperative Medicine, Georgia Regents University, Augusta, Georgia
| | - Chun Zhou
- Center for Lung Biology, University of South Alabama, Mobile, Alabama; Department of Pharmacology, University of South Alabama, Mobile, Alabama; and
| | - Bainan Liu
- Center for Lung Biology, University of South Alabama, Mobile, Alabama; Department of Pharmacology, University of South Alabama, Mobile, Alabama; and
| | - Hairu Chen
- Department of Anesthesiology and Perioperative Medicine, Georgia Regents University, Augusta, Georgia
| | - Thomas M Lincoln
- Department of Physiology, University of South Alabama, Mobile, Alabama
| | - Songwei Wu
- Department of Anesthesiology and Perioperative Medicine, Georgia Regents University, Augusta, Georgia;
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21
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Vasauskas AA, Chen H, Wu S, Cioffi DL. The serine-threonine phosphatase calcineurin is a regulator of endothelial store-operated calcium entry. Pulm Circ 2014; 4:116-27. [PMID: 25006427 DOI: 10.1086/675641] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [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: 08/22/2013] [Accepted: 01/15/2014] [Indexed: 01/25/2023] Open
Abstract
Disruption of the endothelium leads to increased permeability, allowing extravasation of macromolecules and other solutes from blood vessels. Calcium entry through a calcium-selective, store-operated calcium (SOC) channel, I soc, contributes to barrier disruption. An understanding of the mechanisms surrounding the regulation of I soc is far from complete. We show that the calcium/calmodulin-activated phosphatase calcineurin (CN) plays a role in regulation of SOC entry, possibly through the dephosphorylation of stromal interaction molecule 1 (STIM1). Phosphorylation has been implicated as a regulatory mechanism of activity for a number of canonical transient receptor potential (TRPC) and SOC channels, including I soc. Our results show that STIM1 phosphorylation increases in pulmonary artery endothelial cells (PAECs) upon activation of SOC entry. However, the phosphatases involved in STIM1 dephosphorylation are unknown. We found that a CN inhibitor (calcineurin inhibitory peptide [CIP]) increases the phosphorylation pattern of STIM1. Using a fura 2-acetoxymethyl ester approach to measure cytosolic calcium in PAECs, we found that CIP decreases SOC entry following thapsigargin treatment in PAECs. Luciferase assays indicate that thapsigargin induces activation of CN activity and confirm inhibition of CN activity by CIP in PAECs. Also, I soc is significantly attenuated in whole-cell patch-clamp studies of PAECs treated with CIP. Finally, PAECs pretreated with CIP exhibit decreased interendothelial cell gap formation in response to thapsigargin-induced SOC entry, as compared to control cells. Taken together, our data show that CN contributes to the phosphorylation status of STIM1, which is important in regulation of endothelial SOC entry and I soc activity.
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Affiliation(s)
- Audrey A Vasauskas
- Departments of Biochemistry and Molecular Biology and Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA
| | - Hairu Chen
- Department of Anesthesiology and Perioperative Medicine, Georgia Regents University, Augusta, Georgia, USA
| | - Songwei Wu
- Department of Anesthesiology and Perioperative Medicine, Georgia Regents University, Augusta, Georgia, USA
| | - Donna L Cioffi
- Departments of Biochemistry and Molecular Biology and Center for Lung Biology, University of South Alabama, Mobile, Alabama, USA
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22
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Sellak H, Yap FC, Alexeyev MF, Chen H, Lincoln TM, Wu S. α
1G
(Ca
V
3.1) T‐type calcium channel controls NOS3 activation in pulmonary microvascular endothelial cells. FASEB J 2013. [DOI: 10.1096/fasebj.27.1_supplement.724.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hassan Sellak
- Department of Anesthesiology and Perioperative MedicineGeorgia Health Sciences UniversityAugustaGA
- Department of PhysiologyUniversity of South AlabamaMobileAL
| | - Fui Chi Yap
- Center for Lung BiologyDepartment of PharmacologyUniversity of South AlabamaMobileAL
| | - Mikhail F. Alexeyev
- Center for Lung BiologyDepartment of Cell Biology and NeuroscienceUniversity of South AlabamaMobileAL
| | - Hairu Chen
- Department of Anesthesiology and Perioperative MedicineGeorgia Health Sciences UniversityAugustaGA
- Center for Lung BiologyDepartment of PharmacologyUniversity of South AlabamaMobileAL
| | | | - Songwei Wu
- Department of Anesthesiology and Perioperative MedicineGeorgia Health Sciences UniversityAugustaGA
- Center for Lung BiologyDepartment of PharmacologyUniversity of South AlabamaMobileAL
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23
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Kadeba PI, Vasauskas AA, Chen H, Wu S, Scammell JG, Cioffi DL. Regulation of store-operated calcium entry by FK506-binding immunophilins. Cell Calcium 2013; 53:275-85. [PMID: 23375350 DOI: 10.1016/j.ceca.2012.12.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Revised: 12/21/2012] [Accepted: 12/24/2012] [Indexed: 02/06/2023]
Abstract
Calcium entry from the extracellular space into cells is an important signaling mechanism in both physiological and pathophysiological functions. In non-excitable cells, store-operated calcium (SOC) entry represents a principal mode of calcium entry. Activation of SOC entry in pulmonary artery endothelial cells leads to the formation of inter-endothelial cell gaps and subsequent endothelial barrier disruption. Regulation of endothelial SOC entry is poorly understood. In this work, we identify two large molecular weight immunophilins, FKBP51 and FKBP52, as novel regulators of SOC entry in endothelial cells. Using cell fractionation studies and immunocytochemistry we determined that a fraction of these largely cytosolic proteins localize to the plasma membrane where SOC entry channels are found. That FKBP51 and FKBP52 associate with SOC entry channel protein complexes was supported by co-precipitation of the immunophilins with TRPC4, a subunit of the calcium-selective, SOC entry channel ISOC. Dexamethasone-induced upregulation of FKBP51 expression in pulmonary artery endothelial cells reduced global SOC entry as well as ISOC. Similar results were observed when FKBP51 was over-expressed in an inducible HEK293 cell line. On the other hand, when FKBP52 was over-expressed SOC entry was enhanced. When expression of FKBP52 was inhibited, SOC entry was decreased. Collectively, our observations support regulatory roles for these large molecular weight immunophilins in which FKBP51 inhibits, whereas FKBP52 enhances, SOC entry in endothelial cells.
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Affiliation(s)
- Pierre I Kadeba
- Department of Biochemistry, University of South Alabama, Mobile, AL 36688, United States
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24
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Guo W, Wu G, Yan F, Lu Y, Zheng H, Lin L, Chen H, Chen J. Identification of novel Oryza sativa miRNAs in deep sequencing-based small RNA libraries of rice infected with Rice stripe virus. PLoS One 2012; 7:e46443. [PMID: 23071571 PMCID: PMC3468594 DOI: 10.1371/journal.pone.0046443] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2012] [Accepted: 08/30/2012] [Indexed: 01/01/2023] Open
Abstract
MicroRNAs (miRNAs) play essential regulatory roles in the development of eukaryotes. Methods based on deep-sequencing have provided a powerful high-throughput strategy for identifying novel miRNAs and have previously been used to identify over 100 novel miRNAs from rice. Most of these reports are related to studies of rice development, tissue differentiation, or abiotic stress, but novel rice miRNAs related to viral infection have rarely been identified. In previous work, we constructed and pyrosequenced the small RNA (sRNA) libraries of rice infected with Rice stripe virus and described the character of the small interfering RNAs (siRNA) derived from the RSV RNA genome. We now report the identification of novel miRNAs from the abundant sRNAs (with a minimum of 100 sequencing reads) in the sRNA library of RSV-infected rice. 7 putative novel miRNAs (pn-miRNAs) whose precursor sequences have not previously been described were identified and could be detected by Northern blot or RT-PCR, and were recognized as novel miRNAs (n-miRNAs). Further analysis showed that 5 of the 7 n-miRNAs were up-expressed while the other 2 n-miRNAs were down-expressed in RSV-infected rice. In addition, 23 pn-miRNAs that were newly produced from 19 known miRNA precursors were also identified. This is first report of novel rice miRNAs produced from new precursors related to RSV infection.
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Affiliation(s)
- Weixia Guo
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Ministry of China Key Laboratory of Biotechnology in Plant Protection, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
- Plant Protection College, Yunnan Agricultural University, Kunming, China
| | - Gentu Wu
- College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Fei Yan
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Ministry of China Key Laboratory of Biotechnology in Plant Protection, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Yuwen Lu
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Ministry of China Key Laboratory of Biotechnology in Plant Protection, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Hongying Zheng
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Ministry of China Key Laboratory of Biotechnology in Plant Protection, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Lin Lin
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Ministry of China Key Laboratory of Biotechnology in Plant Protection, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
| | - Hairu Chen
- Plant Protection College, Yunnan Agricultural University, Kunming, China
| | - Jianping Chen
- State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Ministry of China Key Laboratory of Biotechnology in Plant Protection, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, China
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25
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Cioffi DL, Wu S, Chen H, Alexeyev M, St Croix CM, Pitt BR, Uhlig S, Stevens T. Orai1 determines calcium selectivity of an endogenous TRPC heterotetramer channel. Circ Res 2012; 110:1435-44. [PMID: 22534489 DOI: 10.1161/circresaha.112.269506] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
RATIONALE Canonical transient receptor potential 4 (TRPC4) contributes to the molecular composition of a channel encoding for a calcium selective store-operated current, I(SOC), whereas Orai1 critically comprises a channel encoding for the highly selective calcium release activated calcium current, I(CRAC). However, Orai1 may interact with TRPC proteins and influence their activation and permeation characteristics. Endothelium expresses both TRPC4 and Orai1, and it remains unclear as to whether Orai1 interacts with TRPC4 and contributes to calcium permeation through the TPRC4 channel. OBJECTIVE We tested the hypothesis that Orai1 interacts with TRPC4 and contributes to the channel's selective calcium permeation important for endothelial barrier function. METHODS AND RESULTS A novel method to purify the endogenous TRPC4 channel and probe for functional interactions was developed, using TRPC4 binding to protein 4.1 as bait. Isolated channel complexes were conjugated to anti-TRPC protein antibodies labeled with cy3-cy5 pairs. Förster Resonance Energy Transfer among labeled subunits revealed the endogenous protein alignment. One TRPC1 and at least 2 TRPC4 subunits constituted the endogenous channel (TRPC1/4). Orai1 interacted with TRPC4. Conditional Orai1 knockdown reduced the probability for TRPC1/4 channel activation and converted it from a calcium-selective to a nonselective channel, an effect that was rescued on Orai1 reexpression. Loss of Orai1 improved endothelial cell barrier function. CONCLUSION Orai1 interacts with TRPC4 in the endogenous channel complex, where it controls TRPC1/4 activation and channel permeation characteristics, including calcium selectivity, important for control of endothelial cell barrier function.
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Affiliation(s)
- Donna L Cioffi
- Department of Biochemistry and Molecular Biology, University of South Alabama College of Medicine, Mobile, AL 36688, USA. dlcioffi@ usouthal.edu
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26
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Wang X, Chen H, Wu S, Cioffi DL. Role of the TRPC4 proline rich region in regulation of the endothelial store‐operated calcium entry. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.1130.8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xiaogan Wang
- Biochemistry and Molecular BiologyUniversity of South AlabamaMobileAL
- Center for Lung BiologyUniversity of South AlabamaMobileAL
| | - Hairu Chen
- Center for Lung BiologyUniversity of South AlabamaMobileAL
- PharmacologyUniversity of South AlabamaMobileAL
| | - Songwei Wu
- Center for Lung BiologyUniversity of South AlabamaMobileAL
- PharmacologyUniversity of South AlabamaMobileAL
| | - Donna L. Cioffi
- Biochemistry and Molecular BiologyUniversity of South AlabamaMobileAL
- Center for Lung BiologyUniversity of South AlabamaMobileAL
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27
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Vasauskas AA, Wang X, Chen H, Wu S, Cioffi DL. The serine‐threonine calcium/calmodulin‐activated phosphatase calcineurin is involved in regulation of store‐operated calcium entry. FASEB J 2012. [DOI: 10.1096/fasebj.26.1_supplement.1130.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Audrey A. Vasauskas
- Biochemistry and Molecular BiologyUniversity of South AlabamaMobileAL
- Center for Lung BiologyUniversity of South AlabamaMobileAL
| | - Xiaogan Wang
- Biochemistry and Molecular BiologyUniversity of South AlabamaMobileAL
- Center for Lung BiologyUniversity of South AlabamaMobileAL
| | - Hairu Chen
- Center for Lung BiologyUniversity of South AlabamaMobileAL
- PharmacologyUniversity of South AlabamaMobileAL
| | - Songwei Wu
- Center for Lung BiologyUniversity of South AlabamaMobileAL
- PharmacologyUniversity of South AlabamaMobileAL
| | - Donna L. Cioffi
- Biochemistry and Molecular BiologyUniversity of South AlabamaMobileAL
- Center for Lung BiologyUniversity of South AlabamaMobileAL
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28
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He Q, Peng J, Yan F, Lin L, Lu Y, Zheng H, Chen H, Chen J. Intron retention and 3'-UTR analysis of Arabidopsis Dicer-like 2 transcripts. Mol Biol Rep 2012; 39:3271-80. [PMID: 21698366 DOI: 10.1007/s11033-011-1095-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2010] [Accepted: 06/15/2011] [Indexed: 12/24/2022]
Abstract
Arabidopsis thaliana Dicer-like protein 2 (AtDCL2) plays an essential role in the RNA interference pathway. The function of AtDCL2 and other DCLs has been much studied but little has been done to characterize the DCLs transcripts before they are translated into proteins. Here, we investigated AtDCL2 transcripts and showed that all 21 introns of AtDCL2 except intron 9, 18, 20 and 21 could be retained although spliced sequences usually predominated. Intron 10 was more frequently retained and transient expression assays in Nicotiana benthamiana leaves showed that when AG/C at the 3' splicing site of the intron was changed to AG/G, the intron was more frequently spliced out. Conversely, a high retention of intron 18 was obtained if the AG/G at the 3' splicing site was changed to AG/C. These results suggest that the sequence at the 3' splicing site affects the efficiency of intron splicing. The 3'-UTRs of AtDCL2 had lengths between 54 and 154 nts, and the different 3'-UTRs differentially affected the transcriptional levels of fused GFP expressed transiently in N. benthamiana. Further comparisons and mutation experiments suggested that a putative SBF-1 binding site and an AU-rich element in the 3'-UTR both down-regulated expression of the upstream GFP fused to the 3'-UTR. Conversely, a second poly(A) consensus signal sequence in one 3'-UTR up-regulated gene expression. Our results provide insight into the character of AtDCL2 transcripts and demonstrate the potential complexity of factors that affect the frequency and patterns of alternative splicing.
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Affiliation(s)
- Qiongji He
- College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, People's Republic of China
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29
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Wang JG, Peng JJ, Chen HR, Chen SY. First Report of Basella rugose mosaic virus Infecting Four O'Clock (Mirabilis jalapa) in China. Plant Dis 2012; 96:294. [PMID: 30731830 DOI: 10.1094/pdis-07-11-0586] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Four o'clock (Mirabilis jalapa) and M. himalaica var. chinensis are members of the family Nyctaginaceae and are widely distributed weeds in Yunnan Province, China. In 2009, mosaic and malformation symptoms were observed on leaves of the four o'clock on the campus of Yunnan Agricultural University and in the Black Dragon Pool Park in Kunming City, China. More than 30% of the four o'clock plants showed symptoms of the disease. Sap from leaves of symptomatic four o'clock plants caused local chlorotic and necrotic lesions in inoculated Chenopodium amaranticolor after 7 to 10 days and systemic mosaic symptoms in C. quinoa and Nicotiana benthamiana after 10 to 12 days. No symptoms were observed following inoculation of sap from asymptomatic plants. A pure virus isolate (MJ) was obtained after three successive single-lesion transfers from C. amaranticolor. Following mechanical inoculation of the MJ isolate, seedlings of indicator plants, N. benthamiana, displayed mosaic symptoms. Moreover, back transmission to healthy four o'clock seedlings by leaf extracts from systemically infected N. benthamiana plants caused similar mosaic and malformation symptoms. Flexuous, filamentous particles (650 to 700 nm long and 13 nm wide) and cytoplasmic laminar aggregates and pinwheel inclusions typical of members of the genus Potyvirus were observed in infected four o'clock leaves by electron microscopy. No other virus particles were observed. Serological testing of 10 symptomatic and healthy plants using a monoclonal antibody specific for Potyvirus group members in an indirect ELISA (Agdia Inc., Elkhart, IN) also resulted in positive reactions in infected leaves, however, all healthy seedlings tested were negative. Total RNAs were extracted from infected four o'clock leaves with the RNeasy Plant Mini Kit (QIAGEN, Hilden, Germany) and the 3'-terminal portion of the viral genome (including part of the NIb polymerase, the entire coat protein (CP), and 3'-UTR) was then amplified by reverse transcription-PCR with a universal Potyviridae primer Sprimer/M4 and an M4T as the initial primer (2). A fragment of 1,720 nucleotides long were separated, purified, and cloned and three independent clones were sequenced (GenBank Accession No. JN250997). Nucleotide and amino acid sequence analysis of the putative CP gene, respectively, revealed 75.1 to 76.3% and 80.3 to 82.1% identity with the Basella rugose mosaic virus (BaRMV) (GenBank Accession Nos. DQ821938, DQ394891, and DQ821939), 77.4 and 81.0% identity with Peace lily mosaic virus (GenBank Accession No. DQ851494), and 76.0 and 81.7% identity with the Phalaenopsis chlorotic spot virus (GenBank Accession No. HM021142). However, on the basis of the CP gene sequence analyses, these three viruses shared high (>88.5 and >94.3%) CP nucleotide and amino acid identity and should be classified as the same Potyvirus species. According to the species demarcation criteria for the Potyviridae (1), the pathogen causing mosaic and malformation symptoms on four o'clock was BaRMV (3). To our knowledge, this is the first report of BaRMV in four o'clock. References: (1) M. J. Adams et al. Arch. Virol. 150:459, 2005. (2) J. Chen et al. Arch. Virol. 146:757, 2001. (3) C. H. Hung and Y. C. Chang. Plant Pathol. 55:819, 2006.
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Affiliation(s)
- J G Wang
- Plant Science Institute, School of Life Science, Yunnan University, Kunming 650091, China
| | - J J Peng
- The Key Laboratory for Plant Pathology of Yunnan Province, Yunnan Agricultural University, Kunming 650201, China
| | - H R Chen
- The Key Laboratory for Plant Pathology of Yunnan Province, Yunnan Agricultural University, Kunming 650201, China
| | - S Y Chen
- Plant Science Institute, School of Life Science, Yunnan University, Kunming 650091, China
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Peng J, Yang J, Yan F, Lu Y, Jiang S, Lin L, Zheng H, Chen H, Chen J. Silencing of NbXrn4 facilitates the systemic infection of Tobacco mosaic virus in Nicotiana benthamiana. Virus Res 2011; 158:268-70. [PMID: 21402112 DOI: 10.1016/j.virusres.2011.03.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2010] [Revised: 03/03/2011] [Accepted: 03/06/2011] [Indexed: 10/18/2022]
Abstract
The 5'-3' exoribonucleases (Xrns) play key roles in degradation and processing pathways of several classes of RNAs including mRNA, rRNA, miRNA and other small RNAs. Recent work revealed that the cytoplasmic Xrn (Xrn1p in yeast and Xrn4 in plants) affected the stability of the viral RNA of tombusviruses in yeast and plants, which indicates that the cytoplasmic Xrn might be involved in plant defense against virus by degrading viral RNA. Here, we demonstrated that silencing of Nicotiana benthamiana cytoplasmic Xrn4 facilitated both local and systemic infection of Tobacco mosaic virus (TMV) in N. benthamiana. The results support the suggestion that cytoplasmic Xrn4 participates in the viral defense system of plants.
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Affiliation(s)
- Jiejun Peng
- Plant Protection College, Yunnan Agricultural University, Kunming 650205, China
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31
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King JA, Tan F, Mbeunkui F, Chambers Z, Cantrell S, Chen H, Alvarez D, Shevde LA, Ofori-Acquah SF. Mechanisms of transcriptional regulation and prognostic significance of activated leukocyte cell adhesion molecule in cancer. Mol Cancer 2010; 9:266. [PMID: 20929568 PMCID: PMC2958981 DOI: 10.1186/1476-4598-9-266] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2010] [Accepted: 10/07/2010] [Indexed: 01/02/2023] Open
Abstract
Background Activated leukocyte cell adhesion molecule (ALCAM) is implicated in the prognosis of multiple cancers with low level expression associated with metastasis and early death in breast cancer. Despite this significance, mechanisms that regulate ALCAM gene expression and ALCAM's role in adhesion of pre-metastatic circulating tumor cells have not been defined. We studied ALCAM expression in 20 tumor cell lines by real-time PCR, western blot and immunochemistry. Epigenetic alterations of the ALCAM promoter were assessed using methylation-specific PCR and bisulfite sequencing. ALCAM's role in adhesion of tumor cells to the vascular wall was studied in isolated perfused lungs. Results A common site for transcription initiation of the ALCAM gene was identified and the ALCAM promoter sequenced. The promoter contains multiple cis-active elements including a functional p65 NF-κB motif, and it harbors an extensive array of CpG residues highly methylated exclusively in ALCAM-negative tumor cells. These CpG residues were modestly demethylated after 5-aza-2-deoxycytidine treatment. Restoration of high-level ALCAM expression using an ALCAM cDNA increased clustering of MDA-MB-435 tumor cells perfused through the pulmonary vasculature of ventilated rat lungs. Anti-ALCAM antibodies reduced the number of intravascular tumor cell clusters. Conclusion Our data suggests that loss of ALCAM expression, due in part to DNA methylation of extensive segments of the promoter, significantly impairs the ability of circulating tumor cells to adhere to each other, and may therefore promote metastasis. These findings offer insight into the mechanisms for down-regulation of ALCAM gene expression in tumor cells, and for the positive prognostic value of high-level ALCAM in breast cancer.
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Affiliation(s)
- Judy A King
- Center for Lung Biology, University of South Alabama, Mobile, AL 36688, USA
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Pastukh V, Chen H, Wu S, Jong CJ, Alexeyev M, Schaffer SW. Effect of hypernatremia on injury caused by energy deficiency: role of T-type Ca2+ channel. Am J Physiol Cell Physiol 2010; 299:C289-97. [PMID: 20505041 DOI: 10.1152/ajpcell.00362.2009] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Hypernatremia exerts multiple cellular effects, many of which could influence the outcome of an ischemic event. To further evaluate these effects of hypernatremia, isolated neonatal cardiomyocytes were chronically incubated with medium containing either normal (142 mM) or elevated sodium (167 mM) and then transferred to medium containing deoxyglucose and the electron transport chain inhibitor amobarbital. Chronic hypernatremia diminished the degree of calcium accumulation and reactive oxygen species generation during the period of metabolic inhibition. The improvement in calcium homeostasis was traced in part to the downregulation of the Ca(V)3.1 T-type calcium channel, as deficiency in the Ca(V)3.1 subtype using short hairpin RNA or treatment with an inhibitor of the Ca(V)3.1 variant of the T-type calcium channel (i.e., diphenylhydantoin) attenuated energy deficiency-mediated calcium accumulation and cell death. Although hyperosmotically stressed cells (exposed to 50 mM mannitol) had no effect on T-type calcium channel activity, they were also resistant to death during metabolic inhibition. Both hyperosmotic stress and hypernatremia activated Akt, suggesting that they initiate the phosphatidylinositol 3-kinase/Akt cytoprotective pathway, which protects the cell against calcium overload and oxidative stress. Thus hypernatremia appears to protect the cell against metabolic inhibition by promoting the downregulation of the T-type calcium channel and stimulating cytoprotective protein kinase pathways.
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Affiliation(s)
- Viktor Pastukh
- Department of Pharmacology, University of South Alabama College of Medicine, Mobile, Alabama, USA
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Zhou C, Chen H, King JA, Sellak H, Kuebler WM, Yin J, Townsley MI, Shin HS, Wu S. Alpha1G T-type calcium channel selectively regulates P-selectin surface expression in pulmonary capillary endothelium. Am J Physiol Lung Cell Mol Physiol 2010; 299:L86-97. [PMID: 20435690 DOI: 10.1152/ajplung.00331.2009] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Regulated P-selectin surface expression provides a rapid measure for endothelial transition to a proinflammatory phenotype. In general, P-selectin surface expression results from Weibel-Palade body (WPb) exocytosis. Yet, it is unclear whether pulmonary capillary endothelium possesses WPbs or regulated P-selectin surface expression and, if so, how inflammatory stimuli initiate exocytosis. We used immunohistochemistry, immunofluorescence labeling, ultrastructural assessment, and an isolated perfused lung model to demonstrate that capillary endothelium lacks WPbs but possesses P-selectin. Thrombin stimulated P-selectin surface expression in both extra-alveolar vessel and alveolar capillary endothelium. Only in capillaries was the thrombin-stimulated P-selectin surface expression considerably mitigated by pharmacologic blockade of the T-type channel or genetic knockout of the T-type channel alpha(1G)-subunit. Depolarization of endothelial plasma membrane via high K(+) perfusion capable of eliciting cytosolic Ca(2+) transients also provoked P-selectin surface expression in alveolar capillaries that was abolished by T-type channel blockade or alpha(1G) knockout. Our findings reveal an intracellular WPb-independent P-selectin pool in pulmonary capillary endothelium, where the regulated P-selectin surface expression is triggered by Ca(2+) transients evoked through activation of the alpha(1G) T-type channel.
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Affiliation(s)
- Chun Zhou
- Center for Lung Biology, University of South Alabama College of Medicine, Mobile, Alabama 36688-0002, USA
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Bauer NN, Rai J, Chen H, Harris L, Shevde L, King J. Breast Cancer Microparticles Promote Formation of a Microenvironment Favorable for Lung Metastasis. FASEB J 2010. [DOI: 10.1096/fasebj.24.1_supplement.592.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | | | - Lalita Shevde
- Mitchell Cancer InstituteUniversity of South AlabamaMobileAL
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Li Y, Liu S, Lu F, Zhang T, Chen H, Wu S, Zhuang H. A role of functional T-type Ca2+ channel in hepatocellular carcinoma cell proliferation. Oncol Rep 2009; 22:1229-35. [PMID: 19787244 DOI: 10.3892/or_00000559] [Citation(s) in RCA: 13] [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: 11/06/2022] Open
Abstract
The role of T-type Ca2+ channels in hepatocellular carcinoma cell proliferation was investigated in vitro. Eleven hepatocellular carcinoma cell lines and one immortalized liver cell line (LO2) were examined for the status of T-type Ca2+ channels with RT-PCR and voltage-clamp recordings. Except HBxF344, other cell lines tested had one, two or all three of alpha1-subunits (alpha1G, alpha1H and alpha1I) mRNA expression. Obvious T-type current was recorded in SNU449 cells, while others exhibited a minimal or no T-type current. SNU449, PLC/PRF5, Hep3B and LO2 cell lines were subjected to growth assay in the presence of Mibefradil, a T-type Ca2+ channel blocker, only the proliferation of SNU449 cell which had functional T-type Ca2+ channel was reduced by Mibefradil treatment. Furthermore, the persistent increase of phosphorylated ERK1/2 in SNU449 cells was found when treated with Mibefradil. A microarray assay also demonstrated some down-regulated genes were mainly associated with cell cycle and cell proliferation in Mibefradil treated SNU449 cells. In conclusion, this study showed that the functional T-type Ca2+ channels probably participate in modulating the proliferation of some hepatocellular carcinoma cells. The cell proliferation reduction of SNU449 with Mibefradil treatment is possibly associated with the persistent increase of phosphorylated ERK1/2.
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Affiliation(s)
- Yajuan Li
- Department of Microbiology, Peking University Health Science Center, and Beijing YouAn Hospital, Beijing 100191, PR China
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Yu L, Chen XL, Gao LL, Chen HR, Huang Q. First Report of Botryosphaeria dothidea Causing Canker and Shoot Blight of Eucalyptus in China. Plant Dis 2009; 93:764. [PMID: 30764373 DOI: 10.1094/pdis-93-7-0764c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Eucalyptus spp. are grown on approximately 2 million ha in China and is the most important genus in forest plantations worldwide. An outbreak of cankers and shoot blight was observed for the first time on Eucalyptus grandis in China during May of 2008. Symptoms included dieback of shoots and branches, lesions and canker formation on the stems, and clear or yellow-to-red exudates on stems and branches. Isolations were made from affected trees in Shilin County from May to July of 2008. Diseased samples were plated on potato dextrose agar (PDA) and incubated at 26°C. Fungal isolates developed copious, white, aerial mycelium that became dark gray after 5 to 6 days and formed black pycnidia after 14 days. Conidia were hyaline, aseptate, thin walled, fusiform, and measured 19 to 28 × 4 to 6 μm. Ascospores were hyaline, aseptate, and widest from the middle to upper third (17 to 28 × 6 to 13 μm). Identity was confirmed by analysis of the rDNA internal transcribed spacer region (ITSI-5.8S-ITS2) with primers ITS1 and ITS4. BLAST searches showed 99 to 100% identity with Botryosphaeria dothidea isolates from GenBank (Accession Nos. FJ358703 and EU080916). Representative sequences of B. dothidea from eucalyptus from China were deposited into GenBank (Accession Nos. FJ517657 and FJ517658). On the basis of morphological and molecular results, the fungus isolated from diseased eucalyptus wood was confirmed to be B. dothidea. Pathogenicity tests were conducted by stem inoculation of 10-month-old E. grandis seedlings. Two experiments were conducted using two inoculation techniques. In the first experiment, 2-mm-diameter actively growing mycelium plugs of B. dothidea were applied to 2-mm-long bark wounds on the middle point of the stems, and control seedlings were inoculated with sterile PDA plugs in a similar fashion as above. Inoculated and control seedlings were inoculated in a greenhouse and watered as needed. In the second experiment, segments of branches (averaging 18 mm in diameter and 30 cm long) were inoculated with 5-mm-diameter plugs of actively growing mycelium. Control segments of branches were inoculated as previously described. The branches were incubated at 26°C in moist chambers. There were five replicate seedlings per inoculation technique. After 20 days, all E. grandis seedlings showed leaf wilting, Dark, vascular stem tissue was observed. Symptoms were more abundant on the segment of branches. After 6 days, vascular necroses that developed on the inoculated plants were 5.2 ± 1.2 cm. B. dothidea was reisolated from all inoculated symptomatic tissue; no symptoms were visible in the control seedlings and no fungus was isolated from them. These results confirm previous reports of B. dothidea causing canker and dieback symptoms of Eucalyptus species in Australia (2), the United States (1), and South Africa (3). To our knowledge, this is the first report of B. dothidea causing canker disease on eucalyptus in China. References: (1) E. L. Barnard et al. Plant Dis. 71:358, 1987. (2) E. M. Davison and C. S. Tay. Plant Dis. 67:1285, 1983. (3) H. Smith et al. Plant Pathol. 43:1031, 1994.
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Affiliation(s)
- L Yu
- College of Plant Protection, Yunnan Agricultural University, Kunming, 650201, Yunnan, China
| | - X L Chen
- College of Plant Protection, Yunnan Agricultural University, Kunming, 650201, Yunnan, China
| | - L L Gao
- College of Plant Protection, Yunnan Agricultural University, Kunming, 650201, Yunnan, China
| | - H R Chen
- College of Plant Protection, Yunnan Agricultural University, Kunming, 650201, Yunnan, China
| | - Q Huang
- College of Plant Protection, Yunnan Agricultural University, Kunming, 650201, Yunnan, China
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37
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Zhou C, Chen H, King JA, Sellak H, Kuebler WM, Yin J, Shin H, Townsley MI, Wu S. A distinct subcellular pool and an α
1G
T‐type Ca
2+
channel regulated surface expression of P‐selectin in pulmonary capillary endothelium. FASEB J 2009. [DOI: 10.1096/fasebj.23.1_supplement.964.13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | | | | | | | | | - Jun Yin
- SurgeryUniversity of TorontoTorontoONCanada
| | - Hee‐Sup Shin
- Center for Neural ScienceKorea Institute of Science and TechnologySeoulRepublic of Korea
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38
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Yan F, Peng J, Lu Y, Lin L, Zheng H, Chen H, Chen J, Adams MJ. Identification of novel splice variants of the Arabidopsis DCL2 gene. Plant Cell Rep 2009; 28:241-246. [PMID: 19011859 DOI: 10.1007/s00299-008-0639-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2008] [Revised: 10/09/2008] [Accepted: 10/30/2008] [Indexed: 05/27/2023]
Abstract
In Arabidopsis thaliana, Dicer-like protein 2 (DCL2) cleaves double-stranded virus RNA, playing an essential role in the RNA interference pathway. Here, we describe three alternative splicing (AS) forms of AtDCL2: in one, both intron 8 and intron 10 are retained in the mRNA, in second only intron 8 is retained and in the third no intron is retained, but there is a deletion of 56 nucleotides at the end of exon 10. These splicing forms are present in stems and leaves at different development stages. AS was also detected in DCL2 of Brassica rapa, where intron 9, but not intron 8 or intron 10, was retained suggesting that AS may be a common phenomenon in cruciferous plant DCL2s. The retained introns and sequence deletions detected in AtDCL2 changed the reading frame and produced premature terminal codons. The AS forms appeared to be substrates of nonsense-mediated decay of mRNA.
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Affiliation(s)
- Fei Yan
- Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, People's Republic of China
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Yan F, Peng J, Lu Y, Lin L, Zheng H, Chen H, Chen J, Adams MJ. Molecular cloning and characterization of the Dicer-like 2 gene from Brassica rapa. Mol Biol Rep 2008; 36:1283-9. [PMID: 18607769 DOI: 10.1007/s11033-008-9310-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2008] [Accepted: 06/27/2008] [Indexed: 10/21/2022]
Abstract
Dicer-like proteins (DCLs) are involved in small RNA-mediated development and viral defense in plants. In model plants, at least four DCLs have been found and a number of studies have helped to understand their function. However, the function of the Dicer or DCLs in other plants is still unclear. Here, we report the full-length cDNA sequence of Brassica rapa ssp. chinensis DCL2 (BrDCL2) gene, which contains a 4,179 bp open reading frame (ORF) encoding a protein of 1,392 amino acids. At the 3' end of BrDCL2, clones with three different lengths of 3' untranslated region were found. An alternative splice variant of BrDCL2, BrDCL2sv, in which one intron was retained between exon9 and exon10, was also cloned. Because of a change in the coding sequence resulting in a premature terminal codon, BrDCL2sv was expected to translate a short peptide containing the whole DEXHc domain.
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Affiliation(s)
- Fei Yan
- Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, People's Republic of China
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40
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Sellak H, Liu B, Zhou C, Chen H, Wu S. Mechanism of hypoxia‐induced α
1H
(Ca
V
3.2) gene expression: examining the transcriptional regulation. FASEB J 2008. [DOI: 10.1096/fasebj.22.1_supplement.960.20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Bainan Liu
- Center for Lung Biology and Department of PharmacologyUniversity of South AlabamaMobileAL
| | - Chun Zhou
- Center for Lung Biology and Department of PharmacologyUniversity of South AlabamaMobileAL
| | - Hairu Chen
- Center for Lung Biology and Department of PharmacologyUniversity of South AlabamaMobileAL
| | - Songwei Wu
- Center for Lung Biology and Department of PharmacologyUniversity of South AlabamaMobileAL
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41
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Chen H, Wu S, Stevens T, Cioffi DL. Calcium phosphate complexation in ISOC channel inactivation. FASEB J 2008. [DOI: 10.1096/fasebj.22.1_supplement.1178.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hairu Chen
- Department of Pharmacology and Center for Lung BiologyUniversity of South AlabamaMobileAL
| | - Songwei Wu
- Department of Pharmacology and Center for Lung BiologyUniversity of South AlabamaMobileAL
| | - Troy Stevens
- Department of Pharmacology and Center for Lung BiologyUniversity of South AlabamaMobileAL
| | - Donna L. Cioffi
- Department of Pharmacology and Center for Lung BiologyUniversity of South AlabamaMobileAL
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Wu S, Chen H, Alexeyev MF, King JAC, Moore TM, Stevens T, Balczon RD. Microtubule motors regulate ISOC activation necessary to increase endothelial cell permeability. J Biol Chem 2007; 282:34801-8. [PMID: 17921144 DOI: 10.1074/jbc.m704522200] [Citation(s) in RCA: 29] [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: 11/06/2022] Open
Abstract
Calcium store depletion activates multiple ion channels, including calcium-selective and nonselective channels. Endothelial cells express TRPC1 and TRPC4 proteins that contribute to a calcium-selective store-operated current, I(SOC). Whereas thapsigargin activates the I(SOC) in pulmonary artery endothelial cells (PAECs), it does not activate I(SOC) in pulmonary microvascular endothelial cells (PMVECs), despite inducing a significant rise in global cytosolic calcium. Endoplasmic reticulum exhibits retrograde distribution in PMVECs when compared with PAECs. We therefore sought to determine whether endoplasmic reticulum-to-plasma membrane coupling represents an important determinant of I(SOC) activation in PAECs and PMVECs. Endoplasmic reticulum organization is controlled by microtubules, because nocodozole induced microtubule disassembly and caused retrograde endoplasmic reticulum collapse in PMVECs. In PMVECs, rolipram treatment produced anterograde endoplasmic reticulum distribution and revealed a thapsigargin-activated I(SOC) that was abolished by nocodozole and taxol. Microtubule motors control organelle distribution along microtubule tracks, with the dynein motor causing retrograde movement and the kinesin motor causing anterograde movement. Dynamitin expression reduces dynein motor function inducing anterograde endoplasmic reticulum transport, which allows for direct activation of I(SOC) by thapsigargin in PMVECs. In contrast, expression of dominant negative kinesin light chain reduces kinesin motor function and induces retrograde endoplasmic reticulum transport; dominant negative kinesin light chain expression prevented the direct activation of I(SOC) by thapsigargin in PAECs. I(SOC) activation is an important step leading to disruption of cell-cell adhesion and increased macromolecular permeability. Thus, microtubule motor function plays an essential role in activating cytosolic calcium transitions through the membrane I(SOC) channel leading to endothelial barrier disruption.
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Affiliation(s)
- Songwei Wu
- Department of Molecular and Cellular Pharmacology, College of Medicine, University of South Alabama, Mobile, Alabama 36688, USA.
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Lu F, Chen H, Zhou C, Liu S, Guo M, Chen P, Zhuang H, Xie D, Wu S. T-type Ca2+ channel expression in human esophageal carcinomas: a functional role in proliferation. Cell Calcium 2007; 43:49-58. [PMID: 17532042 PMCID: PMC2692709 DOI: 10.1016/j.ceca.2007.03.006] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2006] [Revised: 03/19/2007] [Accepted: 03/28/2007] [Indexed: 11/29/2022]
Abstract
In the present study the role of T-type Ca(2+) channels in cancer cell proliferation was examined. Seventeen human esophageal cancer cell lines were screened for T-type channels using RT-PCR and voltage-clamp recordings. mRNAs for all three T-type channel alpha(1)-subunits (alpha(1G), alpha(1H), and alpha(1I)) were detected in all 17 cell lines: either alpha(1H) alone, alpha(1H) and alpha(1G), or all three T-type alpha(1)-subunits. Eleven cell lines were further subjected to voltage-clamp recordings: one, i.e. the TE8 cell line, was found to exhibit a typical T-type current while others exhibited a minimal or no T-type current. Cell proliferation assays were performed in the presence or absence of T-type channel blocker mibefradil in KYSE150, KYSE180 and TE1 cells expressing mRNA for T-type channel alpha(1)-subunits but lacking T-type current, and TE8 cells exhibiting T-type current. Only TE8 cell proliferation was reduced by mibefradil. Silencing the alpha(1G)-gene that encodes functional T-type Ca(2+) channels in TE8 cells with type-specific shRNA transduction also significantly decreased TE8 cell proliferation. The reduction of cell proliferation in TE8 cells was found to be associated with an up-regulation of p21(CIP1). Moreover, p53 silencing nearly abolished the up-regulation of p21(CIP1) resulting from mibefradil T-type channel blockade. Together, these findings suggest a functional role of T-type channels in certain esophageal carcinomas, and that inhibition of T-type channels reduces cell proliferation via a p53-dependent p21(CIP1) pathway.
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Affiliation(s)
- Fengmin Lu
- Department of Microbiology, Peking University Health Science Center, Beijing 100083, China
| | - Hairu Chen
- Center for Lung Biology and Department of Pharmacology, The University of South Alabama College of Medicine, Mobile, Alabama 36688, U.S.A
| | - Chun Zhou
- Center for Lung Biology and Department of Pharmacology, The University of South Alabama College of Medicine, Mobile, Alabama 36688, U.S.A
| | - Shuang Liu
- Otsuka Beijing Research Institute, Beijing 100738, China
| | - Mingzhou Guo
- Department of Oncology, The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland 21231, U.S.A
| | | | - Hui Zhuang
- Department of Microbiology, Peking University Health Science Center, Beijing 100083, China
| | | | - Songwei Wu
- Center for Lung Biology and Department of Pharmacology, The University of South Alabama College of Medicine, Mobile, Alabama 36688, U.S.A
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44
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Chen H, Lu F, Zhou C, Guo M, Wu S. T‐type Ca
2+
Channel Expression in Human Esophageal Carcinomas: A Functional Role in Proliferation. FASEB J 2007. [DOI: 10.1096/fasebj.21.5.a538-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hairu Chen
- Center for Lung Biology and Department of PharmacologyUniversity of South Alabama College of Medicine, 307 N. University Blvd.MSB 3370MobileAL36688
| | - Fengmin Lu
- Department of MicrobiologyPeking University Health Science Center38 XueYuan RoadBeijing100083People's Republic of China
| | - Chun Zhou
- Center for Lung Biology and Department of PharmacologyUniversity of South Alabama College of Medicine, 307 N. University Blvd.MSB 3370MobileAL36688
| | - Mingzhou Guo
- Department of OncologyThe Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins1650 Orleans StreetBaltimoreMD21231
| | - Songwei Wu
- Center for Lung Biology and Department of PharmacologyUniversity of South Alabama College of Medicine, 307 N. University Blvd.MSB 3370MobileAL36688
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45
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Wu S, Chen H, King J, Alexeyev M, Moore T, Stevens T, Balczon R. Microtubule motors regulate activation of the Ca
2+
‐selective store‐operated current,
I
SOC
, important for controlling lung endothelial cell barrier function. FASEB J 2007. [DOI: 10.1096/fasebj.21.6.a1432-b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Songwei Wu
- Center for Lung Biology
- Department of Pharmacology
| | - Hairu Chen
- Center for Lung Biology
- Department of Pharmacology
| | - Judy King
- Center for Lung Biology
- Department of Pathology
| | - Mikhail Alexeyev
- Center for Lung Biology
- Department of Cell Biology and Neuroscience
| | - Timothy Moore
- Center for Lung Biology
- Department of MedicineUniversity of South Alabama College of Medicine307 N. University Blvd., MSB 3370MobileAL36688
| | - Troy Stevens
- Center for Lung Biology
- Department of Pharmacology
| | - Ronald Balczon
- Center for Lung Biology
- Department of Cell Biology and Neuroscience
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46
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Zhou C, Chen H, Lu F, Sellak H, Daigle JA, Alexeyev MF, Xi Y, Ju J, van Mourik JA, Wu S. Cav3.1 (alpha1G) controls von Willebrand factor secretion in rat pulmonary microvascular endothelial cells. Am J Physiol Lung Cell Mol Physiol 2006; 292:L833-44. [PMID: 17172292 PMCID: PMC3048959 DOI: 10.1152/ajplung.00377.2006] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
The T-type Ca2+ channel Cav3.1 subunit is present in pulmonary microvascular endothelial cells (PMVECs), but not in pulmonary artery endothelial cells (PAECs). The present study sought to assess the role of Cav3.1 in thrombin-induced Weibel-Palade body exocytosis and consequent von Willebrand factor (VWF) release. In PMVECs and PAECs transduced with a green fluorescent protein (GFP)-tagged VWF chimera, we examined the real-time dynamics and secretory process of VWF-GFP-containing vesicles in response to thrombin and the cAMP-elevating agent isoproterenol. Whereas thrombin stimulated a progressive decrease in the number of VWF-GFP-containing vesicles in both cell types, isoproterenol only decreased the number of VWF-GFP-containing vesicles in PAECs. In PMVECs, thrombin-induced decrease in the number of VWF-GFP-containing vesicles was nearly abolished by the T-type Ca2+ channel blocker mibefradil as well as by Cav3.1 gene silencing with small hairpin RNA. Expression of recombinant Cav3.1 subunit in PAECs resulted in pronounced increase in thrombin-stimulated Ca2+ entry, which is sensitive to mibefradil. Together, these data indicate that VWF secretion from lung endothelial cells is regulated by two distinct pathways involving Ca2+ or cAMP, and support the hypothesis that activation of Cav3.1 T-type Ca2+ channels in PMVECs provides a unique cytosolic Ca2+ source important for Gq-linked agonist-induced VWF release.
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Affiliation(s)
- Chun Zhou
- Center for Lung Biology, University of South Alabama College of Medicine, Mobile, AL 36688-0002, USA
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47
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Li F, Lin QY, Chen HR, Xie LH. [Current situation and prospect of studies on genus Umbravirus]. Wei Sheng Wu Xue Bao 2006; 46:1033-7. [PMID: 17302177] [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: 05/14/2023]
Abstract
Umbraviruses are a group of imperfectly characterized plant viruses, which are distinguished from most other viruses by their genomes lack of a gene for coat protein (CP) , and as a result umbraviruses do not form conventional virus particles. Umbraviruses are mechanically transmissible, and can be aphid transmitted in the persistent manner by an unrelated assistor virus, which is always a member of the family Luteoviridae . In nature, each umbravirus depends for survival on one particular luteovirus. The genus Umbravirus comprises seven distinct virus specieses and three tentative members. Only Tobacco bushy top virus (TBTV) has been reported in China as an umbravirus. Tobacco bushy top disease, caused by TBTV and its helper, Tobacco vein distorting virus(TVDV), which resulted in severe tobacco losses in western of Yunan. Umbraviruses had a restricted host range in nature, and their infectivity and longevity in vitro are not so stable. Plants infected umbraviruses contain abundant double-stranded RNA (dsRNA), and some umbraviruses possess one or more additional dsRNA species associated with the presence of a satellite RNA. The genomes of the umbraviruses consist of one linear segment of positive sense single-stranded RNA(ssRNA), and the nucleotide sequences possess ORFs for four potential non-structural protein products. The umbravirus-encoded ORF3 proteins play essential roles in stabilization of viral RNA and mediation of its long-distance movement. The current research progresses have been reviewed detailly, and the future research tendency and research fields about umbraviruses and umbravirus-caused diseases are put forward.
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Affiliation(s)
- Fan Li
- Key Laboratory of Agricultural Biodiversity for Pest Management of Ministry of Education, Yunnan Agricultural University, Kunming 650201, China.
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48
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Zhou C, Chen H, Daigle JA, van Mourik JA, Wu S. Ca
V
3.1 (α
1G
) Controls von Willebrand Factor Secretion in Pulmonary Microvascular Endothelial Cells. FASEB J 2006. [DOI: 10.1096/fasebj.20.4.a747-d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Chun Zhou
- Center for Lung Biology and Department of PharmacologyUniversity of South Alabama307 N. University Blvd., MSB 3370MobileAL36688
| | - Hairu Chen
- Center for Lung Biology and Department of PharmacologyUniversity of South Alabama307 N. University Blvd., MSB 3370MobileAL36688
| | - Jonathan A. Daigle
- Center for Lung Biology and Department of PharmacologyUniversity of South Alabama307 N. University Blvd., MSB 3370MobileAL36688
| | | | - Songwei Wu
- Center for Lung Biology and Department of PharmacologyUniversity of South Alabama307 N. University Blvd., MSB 3370MobileAL36688
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49
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Chen H, Zhou C, Creighton J, Sellak H, Wu S. Regulation of Ca
V
3.1 T‐type Ca
2+
channel expression by cAMP in pulmonary microvascular endothelial cells. FASEB J 2006. [DOI: 10.1096/fasebj.20.4.a749-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hairu Chen
- Center for Lung Biology and Department of Pharmacology
| | - Chun Zhou
- Center for Lung Biology and Department of Pharmacology
| | | | - Hassan Sellak
- Department of PhysiologyUniversity of South Alabama307 N. University Blvd.MobileAL36688
| | - Songwei Wu
- Center for Lung Biology and Department of Pharmacology
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50
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Kuebler WM, Chen H, Yin J, Zhou C, Wu S. Depolarization Evokes Calcium Entry Through Ca
V
3.1 Channels in Lung Microvascular Endothelium
in situ
. FASEB J 2006. [DOI: 10.1096/fasebj.20.4.a749-b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Wolfgang M. Kuebler
- Institute of PhysiologyCharité Universitätsmedizin BerlinArnimallee 22Berlin14195Germany
| | - Hairu Chen
- Center for Lung Biology and Department of PharmacologyUniversity of South Alabama307 N. University Blvd.MobileAL36688
| | - Jun Yin
- Institute of PhysiologyCharité Universitätsmedizin BerlinArnimallee 22Berlin14195Germany
| | - Chun Zhou
- Center for Lung Biology and Department of PharmacologyUniversity of South Alabama307 N. University Blvd.MobileAL36688
| | - Songwei Wu
- Center for Lung Biology and Department of PharmacologyUniversity of South Alabama307 N. University Blvd.MobileAL36688
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