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Sui X, Chen H, Jiang W, Yang F, Wang Q, Wang J. P3.16-025 Development and Validation of a Survival Nomogram in Elderly Patients with Resected Non-Small-Cell Lung Cancer. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.1831] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Zhang P, He Z, Tian X, Gao F, Xu D, Liu J, Wen W, Fu L, Li G, Sui X, Xia X, Wang C, Cao S. Cloning of TaTPP-6AL1 associated with grain weight in bread wheat and development of functional marker. MOLECULAR BREEDING 2017; 37:78. [PMID: 0 DOI: 10.1007/s11032-017-0676-y] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
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Sha LY, Zhang Y, Wang W, Sui X, Liu SK, Wang T, Zhang H. MiR-18a upregulation decreases Dicer expression and confers paclitaxel resistance in triple negative breast cancer. EUROPEAN REVIEW FOR MEDICAL AND PHARMACOLOGICAL SCIENCES 2016; 20:2201-2208. [PMID: 27338043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
OBJECTIVE MiR-18a is a miRNA that is aberrantly overexpressed in triple-negative breast cancer (TNBC). However, its biophysical function in TNBC is still not clear. In this study, we investigated the association among miR-18a dysregulation, Dicer dysregulation and paclitaxel (PTX) resistance in TNBC cells. PATIENTS AND METHODS 20 TNBC patients who received neoadjuvant chemotherapy before surgery were recruited. MiR-18a expression was quantified using QRT-PCR. The effects of miR-18a overexpression or knockdown on cell viability and apoptosis of PTX sensitive MDA-MB-231 cells and PTX resistant MDA-MB-231 cells after PTX treatment were studied. The influence of miR-18a overexpression on Dicer expression was measured by qRT-PCR and Western blot analysis. RESULTS Tissues from patients with stable disease (SD, n = 5) and progressive disease (PD, n = 2) to paclitaxel (PTX) containing neoadjuvant chemotherapy had significantly higher miR-18a expression than that from patients with partial response (PR, n = 13). MDA-MB-231/PTX cells had higher miR-18a expression than MDA-MB-231 cells. MiR-18a overexpression directly led to Dicer repression at mRNA and protein level. MiR-18a overexpression significantly increased PTX IC50 and reduced PTX induced cell apoptosis, while miR-18a suppression substantially decreased PTX IC50 and increased PTX induced cell apoptosis. CONCLUSIONS This study found that miR-18a is an important miRNA that suppresses Dicer expression and increases PTX resistance in TNBC cells.
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Li TX, Ding X, Sui X, Tian LL, Zhang Y, Hu JY, Yang XD. Sustained Release of Protein Particle Encapsulated in Bead-on-String Electrospun Nanofibers. J MACROMOL SCI B 2015. [DOI: 10.1080/00222348.2015.1051210] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Sui X, Feng FJ, Zhao D, Xing M, Sun XY, Han SJ, Li MH. Mating system patterns of natural populations of Pinus koraiensis along its post-glacial colonization route in northeastern China. GENETICS AND MOLECULAR RESEARCH 2015; 14:4113-24. [PMID: 25966183 DOI: 10.4238/2015.april.27.26] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
To understand the genetic mechanisms underlying the endangerment of Pinus koraiensis, we studied the mating system of 49 families of this species in 3 natural populations along its post-glacial colonization route across ~1500 km in northeastern China using the chloroplast simple sequence repeat technique. We analyzed 11 polymorphic loci with clear and repeating bands, and we calculated the multi-locus outcrossing rate (tm), single-locus outcrossing rate, inbreeding index, and fixation index (F). Intra-population variation was not observed, but a large inter-population variation was observed in the outcrossing rate, and the tm increased from 0.767 (the south population) to 0.962 (the north population) along the post-glacial colonization route. The tm values within a population did not change with time over 2 consecutive years. The F values for the 3 populations were <0, which indicates an excess of heterozygotes. The mean effective number of alleles, Shannon diversity index, and Nei's genetic diversity index did not show a south-north pattern. The north population had the highest outcrossing rate but the lowest genetic diversity. The average genetic differentiation of P. koraiensis populations was 0.1251, which was within the average range of woody plants with outcrossing and wind pollination. This study suggests that the current endangerment of P. koraiensis is not related to its genetic structure; perhaps it is mainly caused by man-made and natural disturbances such as deforestation and fire. Therefore, reducing disturbances and enhancing habitats, rather than the genetic aspects, play more important roles in the long-term protection of P. koraiensis.
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Zhang S, Song G, Gao J, Li Y, Guo D, Fan Q, Sui X, Chu X, Huang C, Liu J, Li G. Transcriptome characterization and differential expression analysis of cold-responsive genes in young spikes of common wheat. J Biotechnol 2014; 189:48-57. [PMID: 25240441 DOI: 10.1016/j.jbiotec.2014.08.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Revised: 08/21/2014] [Accepted: 08/25/2014] [Indexed: 01/02/2023]
Abstract
With the frequent occurrence of climatic anomalies, spring frost has become a significant limiting factor on wheat production, especially during the reproductive growth stage. A high-throughput sequencing technology was applied and a total of 54 million clean reads that corresponded to 7.44 Gb of total nucleotides were generated. These reads were then de novo assembled into 120,715 unigenes with an average length of 627 bp. Functional annotations were then obtained by aligning all unigenes with public protein databases. In total, 9657 potential EST-SSRs were identified, and 6310 primer pairs for 1329 SSRs were obtained. Meanwhile, a comparison of four tag-based digital gene expression libraries, which was built from the control and cold-treated young spikes were performed. Overall, 526 up-regulated and 489 down-regulated genes were identified, and GO and KEGG pathway analyses of those genes were further conducted. Based on these results, a series of candidate genes involved in cold response pathways were identified, and 12 of them were confirmed by qRT-PCR. The combination of RNA-Seq and digital gene expression analysis in this study provides a powerful approach for investigating the transcriptional changes and obtained a large number of unigenes annotated to public databases.
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Moliner-Urdiales D, Artero EG, Sui X, España-Romero V, Lee D, Blair SN. Body adiposity index and incident hypertension: the Aerobics Center Longitudinal Study. Nutr Metab Cardiovasc Dis 2014; 24:969-975. [PMID: 24974319 PMCID: PMC4130745 DOI: 10.1016/j.numecd.2014.03.004] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Revised: 02/23/2014] [Accepted: 03/10/2014] [Indexed: 01/20/2023]
Abstract
BACKGROUND AND AIM The body adiposity index (BAI) has been recently proposed as a new method to estimate the percentage of body fat. The association between BAI and hypertension risk has not been investigated yet. The aim of our study was to evaluate the ability of BAI to predict hypertension in males and females compared with traditional body adiposity measures. METHODS AND RESULTS The present follow-up analysis comprised 10,309 individuals (2259 females) free of hypertension from the Aerobics Center Longitudinal Study, who completed a baseline examination between 1988 and 2003. Body adiposity measures included BAI, body mass index (BMI), waist circumference, hip circumference, percentage of body fat and waist to hip ratio (WHR). Incident hypertension was ascertained from responses to mail-back surveys between 1990 and 2004. During an average of 9.1 years of follow-up, 872 subjects (107 females) became hypertensive. Hazard ratios (HRs) and 95% confidence intervals (95% CI) showed that males in the highest categories of all body adiposity measures showed a higher incident risk of hypertension (HRs ranged from 1.37 to 2.09). Females showed a higher incident risk of hypertension only in the highest categories of BAI, BMI and WHR (HRs ranged from 1.84 to 3.36). CONCLUSION Our results suggest that in order to predict incident hypertension BAI could be considered as an alternative to traditional body adiposity measures.
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Reyes-Bahamonde J, Raimann JG, Canaud B, Etter M, Kooman JP, Levin NW, Marcelli D, Marelli C, Power A, Van Der Sande FM, Thijssen S, Usvyat LA, Wang Y, Kotanko P, Blank PR, Szucs TD, Gibertoni D, Torroni S, Mandreoli M, Rucci P, Fantini MP, Santoro A, Van Der Veer SN, Nistor I, Bernaert P, Bolignano D, Brown EA, Covic A, Farrington K, Kooman J, Macias J, Mooney A, Van Munster BC, Van Den Noortgate N, Topinkova E, Wirnsberger G, Jager KJ, Van Biesen W, Stubnova V, Os I, Grundtvig M, Waldum B, Wu HY, Peng YS, Wu MS, Chu TS, Chien KL, Hung KY, Wu KD, Carrero JJ, Huang X, Sui X, Ruiz JR, Hirth V, Ortega FB, Blair SN, Coppolino G, Bolignano D, Rivoli L, Presta P, Mazza G, Fuiano G, Marx S, Petrilla A, Hengst N, Lee WC, Ruggajo P, Skrunes R, Svarstad E, Skjaerven R, Reisaether AV, Vikse BE, Fujii N, Hamano T, Akagi S, Watanabe T, Imai E, Nitta K, Akizawa T, Matsuo S, Makino H, Scalzotto E, Corradi V, Nalesso F, Zaglia T, Neri M, Martino F, Zanella M, Brendolan A, Mongillo M, Ronco C, Occelli F, Genin M, Deram A, Glowacki F, Cuny D, Mansurova I, Alchinbayev M, Malikh MA, Song S, Shin MJ, Rhee H, Yang BY, Kim I, Seong EY, Lee DW, Lee SB, Kwak IS, Isnard Bagnis C, Speyer E, Beauger D, Caille Y, Baudelot C, Mercier S, Jacquelinet C, Gentile SM, Briancon S, Yu TM, Li CY, Krivoshiev S, Borissova AM, Shinkov A, Svinarov D, Vlachov J, Koteva A, Dakovska L, Mihaylov G, Popov A, Polner K, Mucsi I, Braunitzer H, Kiss A, Nadasdi Z, Haris A, Zdrojewski L, Zdrojewski T, Rutkowski B, Minami S, Hesaka A, Yamaguchi S, Iwahashi E, Sakai S, Fujimoto T, Sasaki K, Fujita Y, Yokoyama K, Dey V, Farrah T, Traynor J, Spalding E, Robertson S, Geddes CC, Mann MC, Hobbs A, Hemmelgarn BR, Roberts D, Ahmed SB, Rabi D, Elewa U, Fernandez B, Alegre ER, Mahillo I, Egido J, Ortiz A, Marx S, Pomerantz D, Vietri J, Zewinger S, Speer T, Kleber ME, Scharnagl H, Woitas R, Pfahler K, Seiler S, Heine GH, Lepper PM, Marz W, Silbernagel G, Fliser D, Caldararu CD, Gliga ML, Tarta ID, Szanto A, Carlan O, Dogaru GA, Battaglia Y, Del Prete MA, De Gregorio MG, Errichiello C, Gisonni P, Russo L, Scognamiglio B, Storari A, Russo D, Kuma A, Serino R, Miyamoto T, Tamura M, Otsuji Y, Kung LF, Naito S, Iimori S, Okado T, Rai T, Uchida S, Sasaki S, Kang YU, Kim HY, Choi JS, Kim CS, Bae EH, Ma SK, Kim SW, Muthuppalaniappan VM, Byrne C, Sheaff M, Rajakariar R, Blunden M, Delmas Y, Loirat C, Muus P, Legendre C, Douglas K, Hourmant M, Herthelius M, Trivelli A, Goodship T, Bedrosian CL, Licht C, Marks A, Black C, Clark L, Prescott G, Robertson L, Simpson W, Simpson W, Fluck N, Wang SL, Hsu YH, Pai HC, Chang YM, Liu WH, Hsu CC, Shvetsov M, Nagaytseva S, Gerasimov A, Shalyagin Y, Ivanova E, Shilov E, Zhang Y, Zuo W, Marx S, Manthena S, Newmark J, Zdrojewski L, Rutkowski M, Zdrojewski T, Bandosz P, Gaciong Z, Solnica B, Rutkowski B, Wyrzykowski B, Ensergueix G, Karras A, Levi C, Chauvet S, Trivin C, Ficheux M, Augusto JF, Boudet R, Chambaraud T, Boudou-Rouquette P, Tubiana-Mathieu N, Aldigier JC, Jacquot C, Essig M, Thervet E, Oh YJ, Lee CS, Malho Guedes A, Silva AP, Goncalves C, Sampaio S, Morgado E, Santos V, Bernardo I, Leao Neves P, Onuigbo M, Agbasi N. CKD GENERAL AND CLINICAL EPIDEMIOLOGY 1. Nephrol Dial Transplant 2014. [DOI: 10.1093/ndt/gfu146] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
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Sui X, Chen R, Wang Z, Huang Z, Kong N, Zhang M, Han W, Lou F, Yang J, Zhang Q, Wang X, He C, Pan H. Autophagy and chemotherapy resistance: a promising therapeutic target for cancer treatment. Cell Death Dis 2013; 4:e838. [PMID: 24113172 PMCID: PMC3824660 DOI: 10.1038/cddis.2013.350] [Citation(s) in RCA: 888] [Impact Index Per Article: 80.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Revised: 08/25/2013] [Accepted: 08/27/2013] [Indexed: 01/11/2023]
Abstract
Induction of cell death and inhibition of cell survival are the main principles of cancer therapy. Resistance to chemotherapeutic agents is a major problem in oncology, which limits the effectiveness of anticancer drugs. A variety of factors contribute to drug resistance, including host factors, specific genetic or epigenetic alterations in the cancer cells and so on. Although various mechanisms by which cancer cells become resistant to anticancer drugs in the microenvironment have been well elucidated, how to circumvent this resistance to improve anticancer efficacy remains to be defined. Autophagy, an important homeostatic cellular recycling mechanism, is now emerging as a crucial player in response to metabolic and therapeutic stresses, which attempts to maintain/restore metabolic homeostasis through the catabolic lysis of excessive or unnecessary proteins and injured or aged organelles. Recently, several studies have shown that autophagy constitutes a potential target for cancer therapy and the induction of autophagy in response to therapeutics can be viewed as having a prodeath or a prosurvival role, which contributes to the anticancer efficacy of these drugs as well as drug resistance. Thus, understanding the novel function of autophagy may allow us to develop a promising therapeutic strategy to enhance the effects of chemotherapy and improve clinical outcomes in the treatment of cancer patients.
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Guan LP, Zhang RP, Sun Y, Chang Y, Sui X. Synthesis and studies on the anticonvulsant activity of 5-alkoxy-[1,2,4]triazolo[4,3-a]pyridine derivatives. ACTA ACUST UNITED AC 2012; 62:372-7. [PMID: 22782505 DOI: 10.1055/s-0032-1314821] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
In this study, a series of new 5-alkoxy-[1,2,4]triazolo[4,3-a]pyridine derivatives was synthesized and their anticonvulsant activity and neurotoxicity was evaluated with the maximal electroshock and rotarod tests, respectively. The most promising compounds, 3p (5-(4-chlorophenoxy)-[1,2,4]triazolo[4,3-a]pyridine) and 3r (5-(4-bromophenoxy)-[1,2,4]triazolo[4,3-a]pyridine), showed a median effective dose of 13.2 and 15.8 mg/kg and had a protective index value of 4.8 and 6.9, respectively. For exploring the putative mechanism of action, compounds 3n, 3p and 3r were tested in chemically induced models.
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Zhu FF, Zhang PB, Zhang DH, Sui X, Yin M, Xiang TT, Shi Y, Ding MX, Deng H. Generation of pancreatic insulin-producing cells from rhesus monkey induced pluripotent stem cells. Diabetologia 2011; 54:2325-36. [PMID: 21755313 DOI: 10.1007/s00125-011-2246-x] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2011] [Accepted: 06/16/2011] [Indexed: 02/08/2023]
Abstract
AIMS/HYPOTHESIS The generation of induced pluripotent stem cells (iPSCs) provides a promising possibility for type 1 diabetes therapy. However, the generation of insulin-producing cells from iPSCs and evaluation of their efficacy and safety should be achieved in large animals before clinically applying iPSC-derived cells in humans. Here we try to generate insulin-producing cells from rhesus monkey (RM) iPSCs. METHODS Based on the knowledge of embryonic pancreatic development, we developed a four-stage protocol to generate insulin-producing cells from RM iPSCs. We established a quantitative method using flow cytometry to analyse the differentiation efficiency. In addition, to evaluate the differentiation competence and function of RM iPSC-derived cells, transplantation of stage 3 and 4 cells into immunodeficient mice was performed. RESULTS RM iPSCs were sequentially induced to definitive endoderm (DE), pancreatic progenitors (PP), endocrine precursors (EP) and insulin-producing cells. PDX1(+) PP cells were obtained efficiently from RM iPSCs (over 85% efficiency). The TGF-β inhibitor SB431542 promoted the generation of NGN3(+) EP cells, which can generate insulin-producing cells in vivo upon transplantation. Finally, after this four-stage differentiation in vitro, insulin-producing cells that could secrete insulin in response to glucose stimulation were obtained. When transplanted into mouse models for diabetes, these insulin-producing cells could decrease blood glucose levels in approximately 50% of the mice. CONCLUSIONS/INTERPRETATION We demonstrate for the first time that RM iPSCs can be differentiated into functional insulin-producing cells, which will provide the basis for investigating the efficacy and safety of autologous iPSC-derived insulin-producing cells in a rhesus monkey model for type 1 diabetes therapy.
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Sui X, He Z, Lu Y, Wang Z, Xia X. Molecular mapping of a non-host resistance gene YrpstY1 in barley (Hordeum vulgare L.) for resistance to wheat stripe rust. Hereditas 2010; 147:176-82. [PMID: 21039455 DOI: 10.1111/j.1601-5223.2010.02169.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Cultivated barley (Hordeum vulgare L.) is considered as a non-host or inappropriate host species for wheat stripe rust caused by Puccinia striiformis f. sp. tritici. Most barley cultivars show a broad-spectrum resistance to wheat stripe rust. To determine the genes for resistance to wheat stripe rust in barley, a cross was made between a resistant barley line Y12 and a susceptible line Y16. The two parents, F(1) and 147 BC(1) plants were tested at seedling stage with Chinese prevalent race CYR32 of Puccinia striiformis f. sp. tritici by artificial inoculation in greenhouse. The results indicated that Y12 possessed one dominant resistance gene to wheat stripe rust, designated YrpstY1 provisionally. A total of 388 simple sequence repeat (SSR) markers were used to map the resistance gene in Y12 using bulked segregant analysis. A linkage map, including nine SSR loci on chromosome 7H and YrpstY1, was constructed using the BC(1) population, indicating that the resistance gene YrpstY1 is located on chromosome 7H. It is potential to transfer the resistance gene into common wheat for stripe rust resistance.
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Lee DC, Sui X, Ortega FB, Kim YS, Church TS, Winett RA, Ekelund U, Katzmarzyk PT, Blair SN. Comparisons of leisure-time physical activity and cardiorespiratory fitness as predictors of all-cause mortality in men and women. Br J Sports Med 2010; 45:504-10. [PMID: 20418526 DOI: 10.1136/bjsm.2009.066209] [Citation(s) in RCA: 253] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVE To examine the combined associations and relative contributions of leisure-time physical activity (PA) and cardiorespiratory fitness (CRF) with all-cause mortality. DESIGN Prospective cohort study. Setting Aerobics centre longitudinal study. PARTICIPANTS 31,818 men and 10 555 women who received a medical examination during 1978-2002. Assessment of risk factors Leisure-time PA assessed by self-reported questionnaire; CRF assessed by maximal treadmill test. Main outcome measures All-cause mortality until 31 December 2003. RESULTS There were 1492 (469 per 10,000) and 230 (218 per 10,000) deaths in men and women, respectively. PA and CRF were positively correlated in men (r = 0.49) and women (r = 0.47) controlling for age (p < 0.001 for both). PA was inversely associated with mortality in multivariable Cox regression analysis among men, but the association was eliminated after further adjustment for CRF. No significant association of PA with mortality was observed in women. CRF was inversely associated with mortality in men and women, and the associations remained significant after further adjustment for PA. In the PA and CRF combined analysis, compared with the reference group "not meeting the recommended PA (< 500 metabolic equivalent-minute/week) and unfit", the relative risks (95% CIs) of mortality were 0.62 (0.54 to 0.72) and 0.61 (0.44 to 0.86) in men and women "not meeting the recommended PA and fit", 0.96 (0.61 to 1.53) and 0.93 (0.33 to 2.58) in men and women "meeting the recommended PA and unfit" and 0.60 (0.51 to 0.70) and 0.56 (0.37 to 0.85) in men and women "meeting the recommended PA and fit", respectively. CONCLUSIONS CRF was more strongly associated with all-cause mortality than PA; therefore, improving CRF should be encouraged in unfit individuals to reduce risk of mortality and considered in the development of future PA guidelines.
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Huang M, Li J, Zhao G, Sui X, Zhao X, Xu H. Immunophenotype of myeloid granulocytes: a pilot study for distinguishing myelodysplastic syndrome and aplastic anemia by flow cytometry. Int J Lab Hematol 2009; 32:275-81. [PMID: 19968721 DOI: 10.1111/j.1751-553x.2009.01192.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
It is often difficult to distinguish myelodysplastic syndrome (MDS) from aplastic anemia (AA) because of the considerable clinical, cytologic histologic similarities between these two disorders; however, distinguishing between AA and MDS is of great importance because there is a higher risk of progression to acute leukemia in patients with MDS compared with AA. Up to now, CD34(+) cells in MDS and AA patients have been studied extensively; however, little information is available on myeloid granulocytes. The aim of this study was to determine whether immunophenotype of myeloid granulocytes in AA patients was different from that of MDS. Flow cytometry was used to assess the immunophenotype of myeloid granulocytes in 22 patients with MDS, 12 with AA, and 10 normal subjects. Our data showed that the percentages of CD13(+) granulocytes, CD33(+) granulocytes, CD34(+) granulocytes, and HLA-DR(+) granulocytes were significantly higher in patients with MDS than in AA patients and normal subjects (P < 0.05). The percentages of CD15(+) granulocytes and CD10(+) granulocytes were significantly lower in patients with MDS than in AA patients and normal subjects (P < 0.05). There were no significant differences in the expression of these markers between patients with AA and normal subjects (P > 0.05). As refractory anemia progressing to refractory anemia with excess blasts, the percentages of CD13(+) granulocytes, CD33(+) granulocytes, CD34(+) granulocytes and HLA-DR(+) granulocytes were significantly increased, whereas, the percentage of CD15(+) granulocytes was significantly decreased (P < 0.05). These data suggest that immunophenotype of myeloid granulocytes may be a useful parameter for the differential diagnosis of MDS and AA.
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Sieverdes JC, Sui X, Lee DC, Church TS, McClain A, Hand GA, Blair SN. Physical activity, cardiorespiratory fitness and the incidence of type 2 diabetes in a prospective study of men. Br J Sports Med 2009; 44:238-44. [DOI: 10.1136/bjsm.2009.062117] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Chase NL, Sui X, Lee DC, Blair SN. The association of cardiorespiratory fitness and physical activity with incidence of hypertension in men. Am J Hypertens 2009; 22:417-24. [PMID: 19197248 DOI: 10.1038/ajh.2009.6] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Few prospective studies have simultaneously investigated the relationship between physical activity, cardiorespiratory fitness (CRF), and the development of hypertension in initially normotensive individuals. In the Aerobics Center Longitudinal Study (ACLS), we examined this association among initially healthy normotensive men. METHODS Participants were 16,601 men aged 20-82 years who completed a baseline examination during 1970-2002 and were followed for hypertension incidence. Physical activity was self-reported and CRF was quantified from the duration of a maximal treadmill test. RESULTS A total of 2,346 men reported hypertension during a mean 18 years of follow-up. Event rates per 10,000 man-years adjusted for age and examination year were 86.2, 76.6, and 66.7 across physical activity groups of sedentary, walker/jogger/runner (WJR), and sport/fitness, respectively, and 89.8, 78.4, and 64.6 for low, middle, and high CRF, respectively (trend P < 0.0001). These associations persisted after further adjustment for body mass index (BMI), smoking, alcohol intake, resting systolic blood pressure, baseline health status, family history of diseases, and survey response patterns. CONCLUSION Both physical activity and CRF are associated with lower risk of developing hypertension in a graded fashion. These findings provide a basis for health professionals to emphasize the importance of participating in regular physical activity to improve fitness for the primary prevention of hypertension in men.
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Lee DC, Sui X, Blair SN. Does physical activity ameliorate the health hazards of obesity? Br J Sports Med 2008; 43:49-51. [DOI: 10.1136/bjsm.2008.054536] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Shuger SL, Sui X, Church TS, Meriwether RA, Blair SN. Body mass index as a predictor of hypertension incidence among initially healthy normotensive women. Am J Hypertens 2008; 21:613-9. [PMID: 18437123 DOI: 10.1038/ajh.2008.169] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Few prospective studies have evaluated the risk for incident hypertension (HTN) across the normal range of body mass index (BMI). Even fewer studies included body composition and fat distribution measurements in their analyses. In the Aerobics Center Longitudinal Study, we examined HTN risk in women across a wide spectrum of baseline BMI (kg/m(2)) values and also studied waist circumference (WC, cm), percent body fat, fat mass (FM, kg), and fat-free mass (FFM, kg) on incident HTN in subgroup analyses. METHODS A total of 5,296 healthy normotensive women between 20 and 77 years of age completed a baseline examination during 1971-2004, and were followed for HTN incidence. Incident HTN was identified using mail-back surveys. RESULTS A total of 592 women reported HTN during a mean 16.7 years of follow-up. Higher BMI, even within the "normal" range, was associated with greater risk of HTN. Compared with women in the lowest fifth of BMI (18.5-20.0 kg/m(2)), the hazard ratios (HRs) (95% confidence interval (CI)) of developing HTN for women with a BMI of 20.1-21.2, 21.3-22.5, 22.6-24.7, and >24.7 were 1.19 (0.89-1.60), 1.33 (0.99-1.78), 1.36 (1.03-1.81), and 2.01 (1.52-2.66), respectively (P(trend) < 0.001). In a subgroup (n = 3,189) with complete data on all the five adiposity measures, significant positive associations with HTN were seen across incremental fifths of BMI, percent body fat, and FM (P(trend) < 0.05 each), but not WC and FFM. CONCLUSIONS Clinicians should emphasize the importance of weight management for the primary prevention of HTN in women.
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Hedhli N, Wang L, Wang Q, Rashed E, Tian Y, Sui X, Madura K, Depre C. Proteasome activation during cardiac hypertrophy by the chaperone H11 Kinase/Hsp22. Cardiovasc Res 2007; 77:497-505. [DOI: 10.1093/cvr/cvm054] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Phan D, Sui X, Chen DT, Najjar SM, Jenster G, Lin SH. Androgen regulation of the cell-cell adhesion molecule-1 (Ceacam1) gene. Mol Cell Endocrinol 2001; 184:115-23. [PMID: 11694347 DOI: 10.1016/s0303-7207(01)00638-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Previous studies have established that the cell-cell adhesion molecule-1 (CEACAM1, previously known as C-CAM1) functions as a tumor suppressor in prostate cancer and is involved in the regulation of prostate growth and differentiation. However, the molecular mechanism that modulates CEACAM1 expression in the prostate is not well defined. Since the growth of prostate epithelial cells is androgen-regulated, we investigated the effects of androgen and the androgen receptor (AR) on CEACAM1 expression. Transient transfection experiments showed that the AR can enhance the Ceacam1 promoter activity in a ligand-dependent manner and that the regulatory element resides within a relatively short (-249 to -194 bp) segment of the 5'-flanking region of the Ceacam1 gene. This androgen regulation is likely through direct AR-promoter binding because a mutant AR defective in DNA binding failed to upregulate reporter gene expression. Furthermore, electrophoretic mobility shift assays demonstrated that the AR specifically binds to this sequence, and mutation analysis of the potential ARE sequences revealed a region within the sequence that was required for the AR to activate the Ceacam1 gene. Therefore, the regulation of Ceacam1 gene expression by androgen may be one of the mechanisms by which androgen regulates prostatic function.
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Bramlett KS, Dits NF, Sui X, Jorge MC, Zhu X, Jenster G. Repression of androgen-regulated gene expression by dominant negative androgen receptors. Mol Cell Endocrinol 2001; 183:19-28. [PMID: 11604220 DOI: 10.1016/s0303-7207(01)00636-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The androgen receptor (AR) is a ligand-dependent transcription activator responsible for male sexual development. In order to specifically inhibit the AR pathway, dominant negative ARs were constructed by inactivation of the major transactivation domains of the wild type AR and fusing this mutant (AR122) to the Krüppel-associated box (KRAB) repressor domain and/or histone deacetylase (HDAC1). The HDAC1-KRAB-AR122 protein was the most successful dominant negative AR, capable of repressing the wild type AR ninefold when co-expressed at a 1:1 plasmid ratio. A maximal repression of 41-fold was achieved when HDAC1-KRAB-AR122 was cotransfected with the wild type AR at a 4:1 plasmid ratio. HDAC1-KRAB-AR122 repressed transcription in a ligand-dependent manner since it inhibited a constitutively active AR mutant (AR5) only in the presence of agonists. High concentrations of partial agonists such as RU486, cyproterone acetate, and estradiol were also capable of triggering repression by HDAC1-KRAB-AR122. The potent dominant negative AR proteins might prove useful tools to inhibit AR function in vitro and in vivo.
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Ji G, Sun T, Chang S, Sui X, Ma X, Li P. [Super heavy oil produced water treatment by surface flow constructed wetland]. HUAN JING KE XUE= HUANJING KEXUE 2001; 22:95-9. [PMID: 11569124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
This paper adopts a new economic technology of treating super heavy oil produced water using surface flow reed wetland system. The field test was conducted at the average filtration rate of 3.33 cm/d. The average influent concentrations per year of COD, Oil, BOD5, TN were 459.16 mg/L, 27.65 mg/L, 33.52 mg/L, 13.74 mg/L, and the average effluent concentrations per year of above indices were 77.21 mg/L, 1.42 mg/L, 3.90 mg/L, 1.60 mg/L, respectively. Its respective removal ratios of COD, Oil, BOD5, TN and pH were 83.18%, 94.86%, 88.37%, 88.36%, 7.87-7.77. Analyses showed that super heavy oil produced water had no obvious effect on soil and almost no effect on growth volume and quality of reeds. Results indicated that the surface flow reed wetland could provide an efficient economical, stable new means of treating super heavy oil produced water.
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Gangadharan SP, Eslami MH, Weiss IP, Sui X, Conte MS. Monocyte adhesion to balloon-injured arteries: the influence of endothelial cell seeding. J Vasc Surg 2001; 33:1247-54. [PMID: 11389425 DOI: 10.1067/mva.2001.114211] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE Deendothelialization of injuries of the artery disrupts normal vascular homeostasis, affecting both the structural integrity of the blood vessel wall, as well as the interaction of the arterial surface with blood components such as platelets, leukocytes, and circulating proteins. Leukocyte and, in particular, monocyte recruitment to damaged vessels has been implicated in the pathogenesis of intimal hyperplasia. We hypothesize that reendothelialization is an important modulator of monocyte adhesion to healing arterial surfaces. METHODS New Zealand white rabbits (n = 20) were subjected to bilateral iliofemoral artery balloon injury. Cultured, autologous venous endothelial cells (ECs) were immediately seeded onto one vessel, whereas the contralateral artery received medium alone, to accelerate endothelial relining. Vessels were harvested (5-9 days after injury) for analysis of permeability (Evans Blue dye exclusion), endothelial coverage (anti-CD31 immunohistochemistry), monocyte adhesion (ex vivo binding of 51Na2CrO4-labeled monocytic THP-1 cells), and monocyte recruitment (RAM-11 immunohistochemistry). RESULTS Improved EC coverage was evidenced by positive staining for CD31 in the seeded vessels. Vessel wall permeability was markedly reduced in EC-seeded arteries (29% +/- 10% vs 99% +/- 0% surface Evans blue staining, P <.005), consistent with restoration of a functional endothelial barrier. EC seeding significantly reduced ex vivo THP-1 binding to vessels explanted at a mean of 8 days after injury (45,170 +/- 8939 vs 85,994 +/- 16,500 cells/cm2, P <.05). However, RAM-11 staining revealed no significant difference in overall macrophage accumulation between seeded and control vessels 1 week after injury (111 +/- 22 vs 95 +/- 14 cells/section, P =.36). CONCLUSIONS Immediate seeding of a balloon-injured rabbit artery with cultured ECs results in accelerated restoration of the endothelial lining. At 1 week, barrier function is improved, and the seeded vessel surface is less adhesive to activated monocytes ex vivo, as compared with injured controls. Nonetheless, EC-seeded and nonseeded arteries demonstrate similar total macrophage accumulation over 1 week. These data suggest that after mechanical arterial injury, endothelial coverage may be one important variable influencing leukocyte adhesion.
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Sui X, Krantz SB, Zhao ZJ. Stem cell factor and erythropoietin inhibit apoptosis of human erythroid progenitor cells through different signalling pathways. Br J Haematol 2000; 110:63-70. [PMID: 10930980 DOI: 10.1046/j.1365-2141.2000.02145.x] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Erythropoietin (EPO) and stem cell factor (SCF) are two important factors in human erythropoiesis. We have recently demonstrated that SCF and EPO synergistically activate mitogen-activated protein (MAP) kinase, thereby promoting growth of human erythroid colony-forming cells (ECFCs). In the present study, we have examined the intracellular mechanisms by which SCF and EPO maintain survival of these cells. In the absence of SCF and EPO, human ECFCs underwent rapid apoptosis. The process was significantly inhibited by addition of a single factor and was totally prevented in the presence of both factors. Treatment of ECFCs with wortmannin, a specific inhibitor of phosphoinositide 3-kinase (PI3K), inhibited the antiapoptotic effect of SCF but had no effect on that of EPO, indicating that SCF but not EPO inhibits apoptosis through the PI3K pathway. In contrast, treatment of ECFCs with PD98059, a specific inhibitor of MAP kinase/ERK kinase (MEK), inhibited cell growth but had no effect on the antiapoptotic activity of either SCF or EPO, suggesting that SCF and EPO prevent apoptosis of human ECFCs independent of the extracellular signal-regulated kinase (ERK) pathway. Interestingly, both EPO and SCF induced activation of PI3K. However, through PI3K, SCF caused activation of protein kinase B (PKB), an anti-apoptosis signal, whereas EPO led to activation of ERKs. Furthermore, the SCF- and EPO-maintained expression of antiapoptotic protein Bcl-XL was correlated with the activation of ERKs and was inhibited by PD98059, suggesting that Bcl-XL may not have a major role in preventing apoptosis of human ECFCs. Phosphorylated BAD was not affected by SCF, EPO or wortmannin. Taken together with our previous results, the present study indicates that SCF and EPO support survival and growth of human ECFCs through different signalling pathways and that they transduce distinctly different signals through activation of PI3K.
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Eslami MH, Gangadharan SP, Sui X, Rhynhart KK, Snyder RO, Conte MS. Gene delivery to in situ veins: differential effects of adenovirus and adeno-associated viral vectors. J Vasc Surg 2000; 31:1149-59. [PMID: 10842152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
PURPOSE Gene transfer offers the potential to modify vein graft biology at the time of surgical implantation. Efficiency of gene delivery, stability of expression, and host responses are critical parameters for candidate vectors. We compared the effects of intraluminal exposure with adenovirus (AD) and adeno-associated virus (AAV) vectors on transgene expression and monocyte adhesion (MA) in treated vein segments. METHODS Adult New Zealand white rabbits (N = 51) were anesthetized, and the jugular veins were cannulated bilaterally. Veins were gently distended with either vector (2.10(8) to 1.10(10) infective particles/mL) or vehicle (control) for 30 minutes, after which venous flow was restored. AD and AAV vectors encoding for the marker genes beta-galactosidase (LacZ) and green fluorescent protein (GFP) were used. Vessels were explanted 2 to 40 days postinfection for analysis of gene expression (X-gal staining, reverse transcriptase-polymerase chain reaction), MA, and immunohistochemistry. Ex vivo adhesion assays used (51)Cr-labeled THP-1 cells. Statistical significance was tested by using analysis of variance with a P value less than.05. RESULTS All animals survived, and all treated veins were patent at sacrifice. Intraluminal exposure to AD at a titer of 1.10(9) resulted in near complete transduction of the endothelium at 2 days, with no detectable expression by day 14. At an equal titer of infectious particles, transgene expression was markedly less for AAV at 2 to 7 days, but improved at 2 weeks and persisted to 40 days. MA was significantly increased 2 days after AD exposure (2.7-fold vs control, *P <.002); AAV treatment had no discernible effect on MA. CONCLUSION AD-mediated gene transfer to vein segments resulted in robust, transient gene expression that disappeared after 2 weeks. In comparison, AAV-mediated gene delivery was less efficient, but resulted in delayed onset, persistent expression beyond 30 days. AD exposure induced an early increase in MA to the vein surface that was not seen with AAV treatment. Current generations of both AD and AAV vectors have significant, albeit different, limitations for vascular gene therapy.
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