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Chen S, Sun L, Li S, Yin M, Xiong X, He J. Birth defects of 1,397 newborns conceived by in vitro fertilization/intracytoplasmic sperm injection and embryo transfer. Fertil Steril 2007. [DOI: 10.1016/j.fertnstert.2007.07.372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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77
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Krasin M, Merchant T, Spunt S, Davidoff A, Navid F, Wu S, Xiong X, Hua C, Kun L. 202. Int J Radiat Oncol Biol Phys 2006. [DOI: 10.1016/j.ijrobp.2006.07.234] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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78
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Xiong X, Buekens P, Vastardis S, Wu T. Periodontal disease as one possible explanation for the Mexican paradox. Med Hypotheses 2006; 67:1348-54. [PMID: 16935435 DOI: 10.1016/j.mehy.2006.05.059] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2006] [Revised: 05/11/2006] [Accepted: 05/15/2006] [Indexed: 11/24/2022]
Abstract
Mexican-American women have similar low socio-economic status as compared to Non-Hispanic Blacks. However, Mexican-American women have consistently been shown to have a lower rate of low birth weight births as compared to Non-Hispanic Blacks and similar to Non-Hispanic Whites. This phenomenon is referred to as the "Mexican paradox", and the explanation for this is still unclear. We used data from the third US National Health and Nutrition Examination Survey (NHANES III) to compare the rate of periodontal disease in Non-Hispanic Black, Non-Hispanic White and Mexican-American pregnant and non-pregnant women. We found that Mexican-American women have a lower rate of periodontal disease before and during pregnancy when compared to Non-Hispanic Blacks. Since periodontal disease has been associated with an increased risk of preterm birth and low birth weight, we hypothesize that the lower prevalence of periodontal disease before and during pregnancy among Mexican-American women may contribute to the "Mexican paradox".
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Xiong X, Buekens P, Fraser WD, Beck J, Offenbacher S. Authors response to: Periodontal disease and adverse pregnancy outcomes. BJOG 2006. [DOI: 10.1111/j.1471-0528.2006.00968.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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80
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81
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Xiong X, Buekens P, Vastardis S, Pridjian G. Periodontal Disease and Gestational Diabetes Mellitus. Am J Epidemiol 2006. [DOI: 10.1093/aje/163.suppl_11.s52-c] [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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82
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Xiong X, Buekens P, Fraser WD, Beck J, Offenbacher S. Periodontal disease and adverse pregnancy outcomes: a systematic review. BJOG 2006; 113:135-43. [PMID: 16411989 DOI: 10.1111/j.1471-0528.2005.00827.x] [Citation(s) in RCA: 317] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND Recent studies suggest that periodontal disease, as a source of subclinical and persistent infection, may induce systemic inflammatory responses that increase the risk of adverse pregnancy outcomes. OBJECTIVES To examine the existing evidence on the relationship between periodontal disease and adverse pregnancy outcomes. SEARCH STRATEGY Published studies identified via searches of the MEDLINE, EMBASE, CINAHL, and Current Contents full-text databases. SELECTION CRITERIA We identified and selected observational studies (i.e. case-control, cross-sectional, and cohort) and nonrandomised controlled studies or randomised controlled trials that examined periodontal disease as a risk factor for adverse pregnancy outcomes. DATA COLLECTION AND ANALYSIS Odds ratios (OR) or risk ratios (RR) were extracted or calculated from the studies' data. We calculated pooled effect size for two clinical controlled trials but not for the observational studies due to the heterogeneity in definitions for periodontal disease and adverse pregnancy outcomes across studies. MAIN RESULTS Twenty-five studies (13 case-control, 9 cohort, and 3 controlled trials) were identified. The studies focused on preterm low birthweight, low birthweight, preterm birth, birthweight by gestational age, miscarriage or pregnancy loss, and pre-eclampsia. Of the chosen studies, 18 suggested an association between periodontal disease and increased risk of adverse pregnancy outcome (ORs ranging from 1.10 to 20.0) and 7 found no evidence of an association (ORs ranging from 0.78 to 2.54). Three clinical trial studies suggest that oral prophylaxis and periodontal treatment can lead to a 57% reduction in preterm low birthweight (pooled RR 0.43; 95% CI 0.24-0.78) and a 50% reduction in preterm births (RR 0.5; 95% CI 0.20-1.30). AUTHOR'S CONCLUSIONS Periodontal disease may be associated with an increased risk of adverse pregnancy outcome. However, more methodologically rigorous studies are needed for confirmation.
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Luo ZC, Fraser WD, Julien P, Deal CL, Audibert F, Smith GN, Xiong X, Walker M. Tracing the origins of “fetal origins” of adult diseases: Programming by oxidative stress? Med Hypotheses 2006; 66:38-44. [PMID: 16198060 DOI: 10.1016/j.mehy.2005.08.020] [Citation(s) in RCA: 154] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2005] [Revised: 08/04/2005] [Accepted: 08/15/2005] [Indexed: 12/13/2022]
Abstract
Too small size at birth (due to poor fetal growth and/or preterm delivery) has been associated with substantially elevated risks of the metabolic syndrome (dislipidemia, insulin resistance, hypertension), type 2 diabetes and cardiovascular disease in adulthood. The mechanisms of such "fetal origins" or "programming" of disease phenomenon remain unresolved. Too large size at birth seems also associated with an increased risk. Many known or suspected causes of or conditions associated with adverse (poor or excessive) fetal growth or preterm birth have been associated with oxidative stress. Plausibly, oxidative stress may be a common link underlying the superficial "programming" associations between adverse fetal growth or preterm birth and elevated risks of certain chronic diseases. The mechanisms of oxidative stress programming may be through directly modulating gene expression or indirectly through the effects of certain oxidized molecules. Experimental investigations have well demonstrated the role of redox balance in modulating gene expression, and recent studies indicate that both the insulin functional axis and blood pressure could be sensitive targets to oxidative stress programming. Adverse programming may occur without affecting fetal growth, but more frequently among low birth weight infants merely because they more frequently experienced known or unknown conditions with oxidative insults. As oxidative stress levels are easily modifiable during pregnancy and early postnatal periods (which are plausible critical windows), the hypothesis, if proved valid, will suggest new measures that could be very helpful on fighting the increasing epidemic of the metabolic syndrome, type 2 diabetes and cardiovascular disease. Currently, there are several ongoing large randomized trials of antioxidant supplementation to counter oxidative stress during pregnancy for the prevention of preeclampsia. It would be invaluable if long-term follow-ups of infants born to women in such trials could be realized to test the oxidative stress programming hypothesis in such experimental trial settings.
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84
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Merchant T, Kiehna E, Li C, Shukla H, Xiong X, Gajjar A, Mulhern R. Modeling Radiation Dosimetry to Predict Cognitive Outcomes in Pediatric Patients with CNS Embryonal Tumors. Int J Radiat Oncol Biol Phys 2005. [DOI: 10.1016/j.ijrobp.2005.07.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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85
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Hartley K, Li C, Laningham F, Xiong X, Merchant T. Vertebral Body Growth after Craniospinal Irradiation. Int J Radiat Oncol Biol Phys 2005. [DOI: 10.1016/j.ijrobp.2005.07.757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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86
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Li P, Li H, Stagnitti F, Wang X, Zhang H, Gong Z, Liu W, Xiong X, Li L, Austin C, Barry DA. Biodegradation of pyrene and phenanthrene in soil using immobilized fungi Fusarium sp. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2005; 75:443-50. [PMID: 16385948 DOI: 10.1007/s00128-005-0773-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
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87
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Xiong X, Erives H, Xiong S, Xie X, Esposito J, Sun J, Barnes W. Performance of Terra MODIS solar diffuser and solar diffuser stability monitor. ACTA ACUST UNITED AC 2005. [DOI: 10.1117/12.615334] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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88
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Li H, Li P, Hua T, Zhang Y, Xiong X, Gong Z. Bioremediation of contaminated surface water by immobilized Micrococcus roseus. ENVIRONMENTAL TECHNOLOGY 2005; 26:931-9. [PMID: 16128392 DOI: 10.1080/09593332608618504] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
The problems caused by contaminated surface water have gradually become more serious in recent years. Although various remediation technologies were investigated, unfortunately, no efficient method was developed. In this paper, a new bioremediation technology was studied using Micrococcus roseus, which was immobilized in porous spherical beads by an improved polyvinyl alcohol (PVA) - sodium alginate (SA) embedding method. The experimental results indicated that COD removal rate could reach 64.7 % within 72 hours when immobilized M. roseus beads were used, which was ten times as high as that of free cells. The optimum inoculation rate of immobilized M. roseus beads was 10 % (mass percent of the beads in water sample, g g(-1)). Suitable aeration was proved necessary to enhance the bioremediation process. The immobilized cells had an excellent tolerance to pH and temperature changes, and were also more resistant to heavy metal stress compared with free cells. The immobilized M. roseus beads had an excellent regeneration capacity and could be reused after 180-day continuous usage. The Scanning Electronic Microscope (SEM) analysis showed that the bead microstructure was suitable for M. roseus growth, however, some defect structures should still be improved.
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89
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Xiong X, Wightkin J, Magnus JH, Pridjian G, Acuna J, Buekens P. 159: Birth Weight and Infant Growth: ‘Catch-up’ Versus ‘Slow-Down’ Growth. Am J Epidemiol 2005. [DOI: 10.1093/aje/161.supplement_1.s40b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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90
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Xiong X, Zhang L. Preparative SEC Column Packed with Microporous Particles Prepared from Cellulose. J Chromatogr Sci 2005. [DOI: 10.1093/chromsci/43.4.169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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91
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Merchant T, Kiehna E, Kun L, Mulhern R, Li C, Xiong X, Boop F, Sanford R. Phase II trial of conformal radiation therapy for pediatric patients with craniopharyngioma and correlation of radiation dosimetry with change in cognitive function. Int J Radiat Oncol Biol Phys 2004. [DOI: 10.1016/j.ijrobp.2004.07.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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92
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Xiong X, Allinson G, Stagnitti F, Li P, Wang X, Liu W, Allinson M, Turoczy N, Peterson J. Cadmium contamination of soils of the Shenyang Zhangshi Irrigation Area, China: an historical perspective. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2004; 73:270-275. [PMID: 15386039 DOI: 10.1007/s00128-004-0423-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
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93
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Mulhern RK, Khan R, Kaplan S, Xiong X, Wu S, Helton S, Brown R, Bonner M, Christensen R, Reddick W. A randomized, double-blind, placebo-controlled trial of methylphenidate for attentional problems in survivors of childhood cancer. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.8510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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94
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Merchant TE, Kiehna EN, Mulhern RK, Kun LE, Wu S, Xiong X, Williams T, Gajjar A, Boop FA, Sanford RA. Results from a phase II trial of conformal radiation therapy for pediatric patients with localized low-grade astrocytoma and quantification of radiation-related CNS effects. J Clin Oncol 2004. [DOI: 10.1200/jco.2004.22.90140.8533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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95
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Xiong X, Li P, Stagnitti F, Turoczy N, Allinson G, Sherwood J, LeBlanc M. Speciation of heavy metals in sewage irrigated pastures. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2004; 73:71-76. [PMID: 15386074 DOI: 10.1007/s00128-004-0395-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
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96
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Lienemann J, Greiner A, Korvink JG, Xiong X, Hanein Y, Böhringer KF. Modeling, Simulation, and Experimentation of a Promising New Packaging Technology: Parallel Fluidic Self-Assembly of Microdevices. ACTA ACUST UNITED AC 2003. [DOI: 10.1002/seup.200390012] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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97
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Xiong X, Allinson G, Stagnitti F, Murray F, Wang X, Liang R, Peterson J. Effects of simultaneous exposure to atmospheric sulfur dioxide and heavy metals on the yield and metal content of soybean grain (Glycine max [L.] Merr.). BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2003; 71:1005-10. [PMID: 14705662 DOI: 10.1007/s00128-003-8996-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
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98
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Bosley C, Smith J, Baratti P, Pritchard D, Xiong X, Li C, Merchant T. A phase III trial comparing an anionic phospholipid-based (APP) cream and aloe vera-based gel in the prevention and treatment of radiation dermatitis. Int J Radiat Oncol Biol Phys 2003. [DOI: 10.1016/s0360-3016(03)01404-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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99
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Stagnitti F, Villiers N, Parlange JY, Steenhuis TS, de Rooij GH, Li L, Barry DA, Xiong X, Li P. Solute and contaminant transport in heterogeneous soils. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2003; 71:737-745. [PMID: 14672126 DOI: 10.1007/s00128-003-0194-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
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100
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Abstract
OBJECTIVES To study prevalence, risk factors, and birth outcomes of women with anemia during pregnancy in a Chinese population. METHODS A retrospective cohort study was performed based on 16936 pregnancies delivered between January 1989 and December 1990 in Suzhou, China. Anemia was defined as hemoglobin less than 10 g/dl. Multivariate logistic regression was used to estimate odds ratio, 95% confidence interval, and to control for confounding variables. RESULTS The prevalence of anemia was 10.3% at the first trimester, 18.9% at the third trimester. Overall, 26.2% pregnant women experienced anemia in pregnancy. Anemia during early pregnancy was not associated with increased risk of adverse perinatal outcomes. However, anemia in later pregnancy was inversely associated with preterm birth and low birth weight. CONCLUSIONS Anemia during pregnancy does not increase the risk of poor birth outcomes.
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