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Cao J, Ji D, Shen W, Wang Q, Liu Y, Lu D, Sturm I, Huang F, Cleton A. 193P A phase 1 study evaluating the pharmacokinetics (PK), safety, and efficacy of regorafenib (REG) in Chinese patients with advanced, refractory solid tumors. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw581.026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Yu XQ, Cai C, Du X, Shen W. [Effect of hypoxia-inducible factor-2α/stearoyl-CoA desaturase-1 pathway on biological behaviors of hepatoma cells induced by hypoxia]. ZHONGHUA GAN ZANG BING ZA ZHI = ZHONGHUA GANZANGBING ZAZHI = CHINESE JOURNAL OF HEPATOLOGY 2016; 24:506-512. [PMID: 27784428 DOI: 10.3760/cma.j.issn.1007-3418.2016.07.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate whether hypoxia-inducible factor-2α (HIF-2α) affects the biological behaviors of hepatoma cells through regulating stearoyl-CoA desaturase-1 (SCD1) in a hypoxic environment. Methods: HepG2 and SMMC-7721 cells were exposed to 1% O2 to establish the hypoxic models. After hepatoma cells were stimulated by hypoxia for 0, 3, 6, 12, and 24 hours, fluorescent quantitative PCR and Western blot were used to measure the mRNA and protein expression of HIF-2α and SCD1 over time. HIF-2α interfering plasmids and SCD1 inhibitor CAY10566 were used to divide the cells into blank group (nomoxia), hypoxic group (1% O2 for 12 h), hypoxic negative control group (negative HIF-2α plasmid+1% O2 for 12 h), hypoxic interference group (HIF-2α interfering plasmid+1% O2 for 12 h), hypoxic CAY group (CAY10566 10 μmol+1% O2 for 12 h), and hypoxic interference+CAY group (HIF-2α interfering plasmid+CAY10566 10 μmol+1% O2 for 12 h). Western blot was used to measure the protein expression of HIF-2α and SCD1 in hepatoma cells, CCK8 assay was used to measure the proliferative capacity of hepatoma cells, Annexin-V/PE flow cytometry was used to measure the apoptosis of hepatoma cells, and transwell invasion assay was used to measure the invasion of hepatoma cells. A one-way analysis of variance was used to compare the means of multiple samples. Results: Both HepG2 and SMMC-7721 cells showed increasing mRNA and protein expression of HIF-2α and SCD1 over the time of hypoxic induction. After the expression of HIF-2α was downregulated in a hypoxic environment, hepatoma cells showed a significant reduction in the protein expression of SCD1; inhibition of SCD1 expression had no significant effect on the protein expression of HIF-2α in hepatoma cells. After HIF-2α was interfered with and SCD1 expression was inhibited, HepG2 and SMMC-7721 cells showed significantly greater reduction in the protein expression of SCD1 than those with HIF-2α or SCD1 inhibition alone (0.53±0.04 vs 1.12±0.04 or 1.12±0.04; 0.44±0.10 vs 0.90±0.10 or 0.99±0.13) (HIF-2α: FhepG2 = 1026.89, PhepG2 = 0.00, FSMMC-7721 = 2186.22, PSMMC-7721 = 0.00; SCD1: FhepG2 = 1347.93, PhepG2 = 0.00, FSMMC-7721 = 46.43, PSMMC-7721 = 0.00). Inhibition of the expression of HIF-2α or SCD1 reduced the proliferation and invasion of HepG2 and SMMC-7721 cells and promoted apoptosis (P < 0.05); interference and downregulation of HIF-2α combined with inhibition of SCD1 expression by CAY10566 achieved significantly greater reductions in proliferation and invasion and a significantly greater increase in apoptosis rate of hepatoma cells, compared with inhibition of HIF-2α or SCD1 alone (P <0.05). Conclusion: HIF-2α/SCD1 pathway may be one of the important mechanisms for hypoxia to regulate the energy metabolism of hepatoma cells and affect their biological behaviors.
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Pan B, Xu ZW, Xu Y, Liu LJ, Zhu J, Wang X, Nan C, Zhang Z, Shen W, Huang XP, Tian J. Diastolic dysfunction and cardiac troponin I decrease in aging hearts. Arch Biochem Biophys 2016; 603:20-8. [PMID: 27184165 DOI: 10.1016/j.abb.2016.05.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2016] [Revised: 05/07/2016] [Accepted: 05/11/2016] [Indexed: 11/28/2022]
Abstract
Cardiac tropnoin I (cTnI) plays a critical role in the regulation of diastolic function, and its low expression may result in cardiac diastolic dysfunction, which is the most common form of cardiovascular disorders in older adults. In this study, cTnI expression levels were determined in mice at various ages and cardiac function was measured and compared between young adult mice (3 and 10 months) and older mice (18 months). The data indicated that the cTnI levels reached a peak high in young adult hearts (3 months), but decreased in older hearts (18 months). Furthermore, the older hearts showed a significant diastolic dysfunction observed by P-V loop and echocardiography measurements. To further define the mechanism underlying the cTnI decrease in aging hearts, we tested DNA methylation and histone acetylation modifications of cTnI gene. We found that acetylation of histone near the promoter region of cTnI gene played an important role in regulation of cTnI expression in the heart at different ages. Our study indicates that epigenetic modification caused cTnI expression decrease is one of the possible causes that result in a reduced cTnI level and diastolic dysfunction in the older hearts.
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Sun J, Zhu M, Shen W, Wang C, Dai J, Xu L, Jin G, Hu Z, Ma H, Shen H. A potentially functional polymorphism in ABCG2 predicts clinical outcome of non-small cell lung cancer in a Chinese population. THE PHARMACOGENOMICS JOURNAL 2016; 17:280-285. [PMID: 26951883 DOI: 10.1038/tpj.2016.2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Revised: 10/06/2015] [Accepted: 11/26/2015] [Indexed: 12/29/2022]
Abstract
ABCG2, CD133 and CD117 are pivotal markers of cancer stem cell, which are involved in carcinogenesis and cancer progression. The expression of these genes has been reported to be associated with the development and progression of many cancers, including non-small cell lung cancer (NSCLC). We selected and genotyped 9 potentially functional single-nucleotide polymorphisms in the 3 genes in a clinical cohort of 1001 NSCLC patients in a Chinese population. We found that variant genotypes of ABCG2 rs3114020 were associated with a significantly increased risk of death for NSCLC (additive model: adjusted hazard ratio=1.25, 95% confidence intervals=1.10-1.42, P<0.001). Further stepwise regression analysis suggested that rs3114020 was an independent risk factor for the prognosis of NSCLC. Besides, histology interacted with the genetic effect of rs3114020 in relation to NSCLC survival in the interaction analysis. Our findings show that ABCG2 rs3114020 might be one of the candidate biomarkers for NSCLC survival in this Chinese population, especially among patients with adenocarcinoma.
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Kimball AB, Edson-Heredia E, Zhu B, Guo J, Maeda-Chubachi T, Shen W, Bianchi MT. Understanding the Relationship Between Pruritus Severity and Work Productivity in Patients With Moderate-to-Severe Psoriasis: Sleep Problems Are a Mediating Factor. J Drugs Dermatol 2016; 15:183-188. [PMID: 26885786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
BACKGROUND Psoriasis is a debilitating skin disease associated with substantial pruritus, work impairment, and sleep disturbance. OBJECTIVE This study evaluated associations between pruritus and work productivity, and the role of sleep problems as a possible mediator of the relationship between the two. METHODS AND MATERIALS Data from a pruritus visual analog scale (Itch VAS), the Medical Outcomes Study Sleep Scale (MOS-SS), and the Work Productivity and Activity Impairment Questionnaire (WPAI) were collected in a phase 2 clinical trial in patients with psoriasis treated with ixekizumab or placebo. Mediating effects of sleep were tested in multiple regressions with pruritus severity (independent variable) and work productivity (dependent variable). Sobel tests evaluated the significance of sleep's effect. RESULTS Several MOS-SS domains were significantly associated with the WPAI presenteeism, work productivity, and activity impairment scores, and decreased the effect of pruritus. Sobel tests indicated that the Sleep Problems Index I had a significant effect (P<.05) in mediating the relationship between pruritus and presenteeism, work productivity, and activity impairment. CONCLUSION Sleep may mediate the role of pruritus on work productivity, but both factors appear to have independent negative effects on work.
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Wang HH, Cui Q, Zhang T, Wang ZB, Ouyang YC, Shen W, Ma JY, Schatten H, Sun QY. Rab3A, Rab27A, and Rab35 regulate different events during mouse oocyte meiotic maturation and activation. Histochem Cell Biol 2016; 145:647-57. [PMID: 26791531 DOI: 10.1007/s00418-015-1404-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/31/2015] [Indexed: 01/22/2023]
Abstract
Rab family members play important roles in membrane trafficking, cell growth, and differentiation. Almost all components of the cell endomembrane system, the nucleus, and the plasma membrane are closely related to RAB proteins. In this study, we investigated the distribution and functions of three members of the Rab family, Rab3A, Rab27A, and Rab35, in mouse oocyte meiotic maturation and activation. The three Rab family members showed different localization patterns in oocytes. Microinjection of siRNA, antibody injection, or inhibitor treatment showed that (1) Rab3A regulates peripheral spindle and cortical granule (CG) migration, polarity establishment, and asymmetric division; (2) Rab27A regulates CG exocytosis following MII-stage oocyte activation; and (3) Rab35 plays an important role in spindle organization and morphology maintenance, and thus meiotic nuclear maturation. These results show that Rab proteins play important roles in mouse oocyte meiotic maturation and activation and that different members exert different distinct functions.
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Shen W, Chen J, Yin J, Wang SL. Selenium protects reproductive system and foetus development in a rat model of gestational lead exposure. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2016; 20:773-780. [PMID: 26957284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVE Lead is a common environmental contaminant. Lead accumulation in the body is especially dangerous for pregnant women and newborns. Selenium is a trace element which may rectify the damaging effects of lead. Here we tested potential protective effects of selenium against gestational lead exposure. MATERIALS AND METHODS Pregnant SD rats were exposed to 200 mg/L of lead acetate (given with water), with or without sodium selenite supplementation (2-8 mg/kg/day via intragastric administration). Pregnant rats not exposed to lead or selenium served as control animals. The outcomes in pregnant rats were serum lead and selenium levels, reproductive hormone (follicle-stimulating hormone, luteinizing hormone, prolactin, oestradiol, progesterone) levels, and uterine and ovarian morphological changes. The outcomes in the offspring were sex differentiation, survival rates (day 21 after birth), weight (days 0-35 after birth), weight of reproductive organs, and puberty onset (foreskin separation or vaginal opening). RESULTS Selenium supplementation dose-dependently decreased serum lead levels, rectified reproductive hormone levels, and attenuated reproductive morphological changes caused by lead exposure. Lead exposure did not affect sex differentiation, but significantly (p < 0.05 vs. control animals) decreased the offspring weight on days 0-28 and the weight of their reproductive organs. Furthermore, lead exposure delayed the onset of puberty. These pathological changes were dose-dependently rectified or attenuated by selenium supplementation. CONCLUSIONS Gestational lead exposure causes damages to the reproductive system of pregnant rats, and negatively modulates growth and reproductive system development of the offspring. These adverse effects are rectified or attenuated by selenium supplementation.
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Cao J, Li J, Ji D, Shen W, Jiang L, Ma X, Pang J, Kanehisa A, Legrand F, Pallis A, Paux G, Robert R, Chen X, Letecheur P, Qiang L, Ding J. 126O A phase I study evaluating the safety, efficacy, pharmacokinetics and pharmacodynamics of AL3810 in advanced solid tumors. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv521.02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Wu Y, Fan L, Liu M, Shen W, Xiang D, Cai X. Anti-Di(b) causing hemolytic disease of the fetus and newborn and the challenges of anti-Di(b) in perinatal management in China. Transfus Med 2015; 25:428-30. [PMID: 26578228 DOI: 10.1111/tme.12260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Revised: 07/22/2015] [Accepted: 10/24/2015] [Indexed: 11/27/2022]
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Zhu S, Su J, Liu Z, Shen W, Li S, Xu J, Dong H. Comparative Study of the Failure Model of Esophageal Cancer With Elective Nodal Prophylactic and Involved-Field Irradiation. Int J Radiat Oncol Biol Phys 2015. [DOI: 10.1016/j.ijrobp.2015.07.911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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86
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Shen W, Chang A, Wang J, Zhou W, Gao R, Li J, Xu Y, Luo X, Xiang R, Luo N, Stupack DG. TIFA, an inflammatory signaling adaptor, is tumor suppressive for liver cancer. Oncogenesis 2015; 4:e173. [PMID: 26501855 PMCID: PMC4632091 DOI: 10.1038/oncsis.2015.30] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 07/29/2015] [Accepted: 08/07/2015] [Indexed: 02/07/2023] Open
Abstract
TIFA (TNF receptor associated factor (TRAF)-interacting protein with a Forkhead-associated (FHA) domain), also called T2BP, was first identified using a yeast two-hybrid screening. TIFA contains a FHA domain, which directly binds phosphothreonine and phosphoserine, and a consensus TRAF6-binding motif. TIFA-mediated oligomerization and poly-ubiquitinylation of TRAF6 mediates signaling downstream of the Tumor necrosis factor alpha receptor 1 (TNFaR-I) and interleukin-1/Toll-like receptor 4 (TLR4) pathways. Examining TIFA expression in hepatocellular carcinoma (HCC) tissues microarrays, we noted marked decreases TIFA reactivity in tumor versus control samples. In agreement, we found that HCC cell lines show reduced TIFA expression levels versus normal liver controls. Reconstituting TIFA expression in HCC cell lines promoted two independent apoptosis signaling pathways: the induction of p53 and cell cycle arrest, and the activation of caspase-8 and caspase-3. In contrast, the expression of a non-oligomerizing mutant of TIFA impacted cells minimally, and suppression of TIFA expression protected cells from apoptosis. Mice bearing TIFA overexpression hepatocellular xenografts develop smaller tumors versus TIFA mutant tumors; terminal deoxynucleotidyl transferase dUTP nick end labeling staining demonstrates increased cell apoptosis, and decreased proliferation, reflecting cell cycle arrest. Interestingly, p53 has a greater role in decreased proliferation than cell death, as it appeared dispensable for TIFA-induced cell killing. The findings demonstrate a novel suppressive role of TIFA in HCC progression via promotion of cell death independent of p53.
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Ge W, Chen C, De Felici M, Shen W. In vitro differentiation of germ cells from stem cells: a comparison between primordial germ cells and in vitro derived primordial germ cell-like cells. Cell Death Dis 2015; 6:e1906. [PMID: 26469955 PMCID: PMC4632295 DOI: 10.1038/cddis.2015.265] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 08/01/2015] [Accepted: 08/04/2015] [Indexed: 01/15/2023]
Abstract
Stem cells are unique cell types capable to proliferate, some of them indefinitely, while maintaining the ability to differentiate into a few or any cell lineages. In 2003, a group headed by Hans R. Schöler reported that oocyte-like cells could be produced from mouse embryonic stem (ES) cells in vitro. After more than 10 years, where have these researches reached? Which are the major successes achieved and the problems still remaining to be solved? Although during the last years, many reviews have been published about these topics, in the present work, we will focus on an aspect that has been little considered so far, namely a strict comparison between the in vitro and in vivo developmental capabilities of the primordial germ cells (PGCs) isolated from the embryo and the PGC-like cells (PGC-LCs) produced in vitro from different types of stem cells in the mouse, the species in which most investigation has been carried out. Actually, the formation and differentiation of PGCs are crucial for both male and female gametogenesis, and the faithful production of PGCs in vitro represents the basis for obtaining functional germ cells.
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Cohen A, Shen W, Dempster DW, Zhou H, Recker RR, Lappe JM, Kepley A, Kamanda-Kosseh M, Bucovsky M, Stein EM, Nickolas TL, Shane E. Marrow adiposity assessed on transiliac crest biopsy samples correlates with noninvasive measurement of marrow adiposity by proton magnetic resonance spectroscopy ((1)H-MRS) at the spine but not the femur. Osteoporos Int 2015; 26:2471-8. [PMID: 25986383 PMCID: PMC5206911 DOI: 10.1007/s00198-015-3161-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Accepted: 04/29/2015] [Indexed: 01/29/2023]
Abstract
UNLABELLED Measurement of marrow fat (MF) is important to the study of bone fragility. We measured MF on iliac biopsies and by spine/hip magnetic resonance spectroscopy in the same subjects. Noninvasively assessed spine MF and histomorphometrically assessed MF correlated well. MF quantity and relationships with bone volume differed by measurement site. INTRODUCTION Excess marrow fat has been implicated in the pathogenesis of osteoporosis in several populations. In the bone marrow, adipocytes and osteoblasts share a common precursor and are reciprocally regulated. In addition, adipocytes may secrete toxic fatty acids and adipokines that adversely affect osteoblasts. Measurement of marrow fat is important to the study of mechanisms of bone fragility. Marrow fat can be quantified on bone biopsy samples by histomorphometry and noninvasively by proton magnetic resonance spectroscopy ((1)H-MRS). In this study, we evaluate relationships between marrow fat assessed using both methods in the same subjects for the first time. METHODS Sixteen premenopausal women, nine with idiopathic osteoporosis and seven normal controls, had marrow fat measured at the iliac crest by bone biopsy and at the lumbar spine (L3) and proximal femur by (1)H-MRS. RESULTS At L3, fat fraction by (1)H-MRS correlated directly and significantly with marrow fat variables on iliac crest biopsies (r = 0.5-0.8). In contrast, there were no significant correlations between fat fraction at the femur and marrow fat on biopsies. Marrow fat quantity (%) was greater at the femur than at L3 and the iliac crest and correlated inversely with total hip and femoral neck BMD by DXA. CONCLUSIONS In summary, measurement of marrow fat in transiliac crest biopsies correlates with marrow fat at the spine but not the proximal femur by (1)H-MRS. There were site-specific differences in marrow fat quantity and in the relationships between marrow fat and bone volume.
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Robinson T, Gaines T, Wu J, Christianson M, Shen W. Experience of women with human immunodeficiency virus during the menopause transition. Fertil Steril 2015. [DOI: 10.1016/j.fertnstert.2015.07.327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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90
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Yankun C, Zhihui T, Runxiao L, Shen W. SU-E-T-119: Analysis the Efficacy of Different Radiotherapy Methods and Failure Mode in No-Metastasis Esophageal Squamous Cell Carcinoma. Med Phys 2015. [DOI: 10.1118/1.4924480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Negoro E, Hosono N, Shen W, Przychozen B, Patel B, Tetsuichi Y, Brittney D, Cassandra H, Polprasert C, Clemente M, Sekeres M, Ogawa S, Makishima H, Maciejewski J. 66 SUBCLINICAL ANCESTRAL EVENTS FOR PROGRESSION TO MANIFEST CLONAL MYELODYSPLASIA ARE PRESENT IN APLASTIC ANEMIA AT PRESENTATION: COMPARISON OF DE NOVO AND POST AA MDS. Leuk Res 2015. [DOI: 10.1016/s0145-2126(15)30067-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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92
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Zhu S, Shen W, Liu Z, Li J, Su J. PO-0697: Comparative study failure model esophageal carcinoma with elective nodal regional and involved field irradiation. Radiother Oncol 2015. [DOI: 10.1016/s0167-8140(15)40689-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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93
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Edson-Heredia E, Banerjee S, Zhu B, Maeda-Chubachi T, Cameron G, Shen W, Heffernan M, Gordon K, Leonardi C. A high level of clinical response is associated with improved patient-reported outcomes in psoriasis: analyses from a phase 2 study in patients treated with ixekizumab. J Eur Acad Dermatol Venereol 2015; 30:864-5. [DOI: 10.1111/jdv.13032] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Shen W, El Sayed Moussa M, Yao Y, Réau R, Lescop C. Correction: Supramolecular metallacycles with a ‘pseudo double-paracyclophane’ structure based on flexible π-conjugated linkers. Chem Commun (Camb) 2015; 51:15079. [DOI: 10.1039/c5cc90410b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Correction for ‘Supramolecular metallacycles with a ‘pseudo double-paracyclophane’ structure based on flexible π-conjugated linkers’ by W. Shen et al., Chem. Commun., 2015, 51, 11560–11563.
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Shen W, El Sayed Moussa M, Yao Y, Lescop C. Supramolecular metallacycles with a ‘pseudo double-paracyclophane’ structure based on flexible π-conjugated linkers. Chem Commun (Camb) 2015; 51:11560-3. [DOI: 10.1039/c5cc03778f] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Coordination-driven supramolecular synthesis of new supramolecular π-stacked metallacycles based on flexible π-conjugated linkers and having a ‘pseudo double-paracyclophane’ structure is presented.
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Shen W, Yang G, Chen Y, Yan P, Tuo D, Li X, Zhou P. Resistance of non-transgenic papaya plants to papaya ringspot virus (PRSV) mediated by intron-containing hairpin dsRNAs expressed in bacteria. Acta Virol 2014; 58:261-6. [PMID: 25283861 DOI: 10.4149/av_2014_03_261] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
RNA-mediated virus resistance based on natural antiviral RNA silencing has been exploited as a powerful tool for engineering virus resistance in plants. In this study, a conserved 3'-region (positions 9839-10117, 279 nt) of the capsid protein (CP) gene of papaya ringspot virus (PRSV), designated CP279, was used to generate an intron-containing hairpin RNA (ihpRNA) construct by one-step, zero-background ligation-independent cloning (OZ-LIC). The RNaseIII-deficient Escherichia coli strain M-JM109lacY was identified as the best choice for producing large quantities of specific ihpRNA-CP279. Resistance analyses and ELISA data verified that most papaya plants mechanically co-inoculated with TRIzol-extracted ihpRNA-CP279 and PRSV were resistant to PRSV, and resistance was maintained throughout the test period (>2 months post-inoculation). In contrast, a 1-2 day interval between sequential inoculation of PRSV and ihpRNA-CP279 did not result in complete protection against PRSV infection, but delayed the appearance of viral symptoms by 3 to 4 days. These findings indicate that direct mechanical inoculation of papaya plants with bacterially-expressed ihpRNA-CP279 targeting the PRSV CP gene can interfere with virus infection. This work lays a foundation for developing a non-transgenic approach to control PRSV by directly spraying plants with ihpRNA or crude bacterial extract preparations.
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Shen W, Wang Y, Tuo D, Yan P, Yang Y, Li X, Zhou P. Agroinoculation of Carica papaya with infectious clones of papaya mosaic virus. Acta Virol 2014; 58:380-2. [PMID: 25518722 DOI: 10.4149/av_2014_04_380] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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98
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Cao X, Shen W. Need for clarification of data in a recent meta-analysis on the association of NQO1 C609T polymorphism with cancer risk. Br J Cancer 2014; 111:2201-2. [PMID: 25349978 PMCID: PMC4260015 DOI: 10.1038/bjc.2014.212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Zhu B, Edson-Heredia E, Guo J, Maeda-Chubachi T, Shen W, Kimball AB. Itching is a significant problem and a mediator between disease severity and quality of life for patients with psoriasis: results from a randomized controlled trial. Br J Dermatol 2014; 171:1215-9. [PMID: 24749812 DOI: 10.1111/bjd.13065] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/15/2014] [Indexed: 11/28/2022]
Abstract
BACKGROUND In patients with moderate-to-severe psoriasis, health-related quality of life (HRQOL) has been shown to improve in parallel with improvement in disease severity. OBJECTIVES To evaluate the role of pruritus (itch) in mediating the relationship between improvements in disease severity and HRQOL. METHODS Data from a phase 2 clinical trial, in which 142 patients with moderate-to-severe plaque psoriasis received ixekizumab or placebo, were used for this posthoc analysis. Relationships between improvement in Psoriasis Area and Severity Index (PASI), Itch Visual Analogue Scale (VAS) and Dermatology Life Quality Index (DLQI), as well as in individual DLQI domains (symptoms and feelings, treatment, work and school, daily activities, leisure, and personal relationships) from baseline to week 16 were determined. Multiple hierarchical linear regressions and Sobel tests were conducted to evaluate the results. RESULTS Improvement in PASI was highly correlated with pruritus improvement and improvements in DLQI total and domain scores at week 16 (P < 0·01). Multiple hierarchical linear regression analyses showed a statistically significant (P < 0·01) association between improvement in pruritus and improvement in DLQI total score and each of the six DLQI domain scores after adjusting for improvement in PASI. Sobel tests indicated that pruritus had a significant mediation effect (P < 0·05) on the association of PASI improvement with improvement in DLQI total score and all domains except the personal relationships score. CONCLUSIONS Pruritus appears to be an important mediator of the association between improvements in disease severity and HRQOL in patients with moderate-to-severe psoriasis.
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Then WL, Li M, McLiesh H, Shen W, Garnier G. The detection of blood group phenotypes using paper diagnostics. Vox Sang 2014; 108:186-96. [DOI: 10.1111/vox.12195] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2014] [Revised: 08/12/2014] [Accepted: 08/13/2014] [Indexed: 12/01/2022]
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