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Fang X, Liu X, Liu W, Lu C. Pharmacokinetics of enrofloxacin in allogynogenetic silver crucian carp, Carassius auratus gibelio. J Vet Pharmacol Ther 2011; 35:397-401. [PMID: 21913940 DOI: 10.1111/j.1365-2885.2011.01337.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
The pharmacokinetics of enrofloxacin (EF) was investigated after single intravenous (i.v.) and oral (p.o.) administration of 10 mg/kg body weight (b.w.) in 300 healthy allogynogenetic silver crucian carp at 24-26°C. The plasma concentrations of EF and its metabolite ciprofloxacin (CF) were determined by high-performance liquid chromatography. After i.v. administration, the plasma concentration-time data were described by an open two-compartment model. The elimination half-life (T(1/2β)), area under the concentration-time curve (AUC) and total body clearance of EF were 63.5 h, 239.6 μg·h/mL and 0.04 L/h/kg, respectively. Following p.o. administration, the plasma concentration-time data showed a double peak-shaped curve, indicating the possibility of enterohepatic recirculation of EF in allogynogenetic silver crucian carp. The maximum plasma concentration (C(max)), T(1/2β) and AUC of EF were 4.5 μg/mL, 62.7 h and 205.9 μg·h/mL, respectively. Absorption of EF was very good with a bioavailability (F) of 86%, which could be correlated with the unique structure of the alimentary canal in allogynogenetic silver crucian. CF, an active metabolite of EF, was not detected in this study.
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202
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Tsukinoki R, Murakami Y, Huxley R, Lam TH, Fang X, Suh I, Ohkubo T, Ueshima H, Woodward M. P2-309 Impact of excess weight on the relationship between blood pressure and cardiovascular disease: the Asia Pacific Cohort Studies Collaboration. Br J Soc Med 2011. [DOI: 10.1136/jech.2011.142976k.42] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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203
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Fang X, Cai Y, Liu J, Wang Z, Wu Q, Zhang Z, Yang CJ, Yuan L, Ouyang G. Twist2 contributes to breast cancer progression by promoting an epithelial-mesenchymal transition and cancer stem-like cell self-renewal. Oncogene 2011; 30:4707-20. [PMID: 21602879 DOI: 10.1038/onc.2011.181] [Citation(s) in RCA: 143] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The epithelial to mesenchymal transition (EMT) is a highly conserved cellular programme that has an important role in normal embryogenesis and in cancer invasion and metastasis. We report here that Twist2, a tissue-specific basic helix-loop-helix transcription factor, is overexpressed in human breast cancers and lymph node metastases. In mammary epithelial cells and breast cancer cells, ectopic overexpression of Twist2 results in morphological transformation, downregulation of epithelial markers and upregulation of mesenchymal markers. Moreover, Twist2 enhances the cell migration and colony-forming abilities of mammary epithelial cells and breast cancer cells in vitro and promotes tumour growth in vivo. Ectopic expression of Twist2 in mammary epithelial cells and breast cancer cells increases the size and number of their CD44(high)/CD24(low) stem-like cell sub-populations, promotes the expression of stem cell markers and enhances the self-renewal capabilities of stem-like cells. In addition, exogenous expression of Twist2 leads to constitutive activation of STAT3 (signal transducer and activator of transcription 3) and downregulation of E-cadherin. Thus, the overexpression of Twist2 may contribute to breast cancer progression by activating the EMT programme and enhancing the self-renewal of cancer stem-like cells.
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204
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Thota R, Birdsong S, Tashi T, Gonsalves W, Tiwana J, Sama AR, Krishnamurthy J, Fang X, Townley PM, Silberstein PT, Subbiah S. Clinicopathologic features and survival outcomes of primary signet ring cell carcinoma of colon: Retrospective analysis of VACCR database. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e14097] [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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205
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Wang H, Ye L, Yu L, Xie G, Cheng B, Liu X, Jin Y, Wu S, Zhu T, Chen Q, Fang X. Performance of sequential organ failure assessment, logistic organ dysfunction and multiple organ dysfunction score in severe sepsis within Chinese intensive care units. Anaesth Intensive Care 2011; 39:55-60. [PMID: 21375090 DOI: 10.1177/0310057x1103900108] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This study assessed the performance of Sequential Organ Failure Assessment, Logistic Organ Dysfunction Score and Multiple Organ Dysfunction Score in outcome prediction in severe sepsis. A total of 528 consecutive patients with a diagnosis of severe sepsis were enrolled from two surgical intensive care units of university hospitals in China. Clinical and laboratory data of patients were collected and admission and maximum values of each scoring system were calculated. Areas under the receiver operating characteristic curve, which were used to assess discrimination, were 0.80, 0.83 and 0.74 for admission Sequential Organ Failure Assessment, Logistic Organ Dysfunction Score and Multiple Organ Dysfunction Score respectively, and 0.91, 0.93 and 0.86 for corresponding maximum values respectively. Calibration assessed by the Hosmer-Lemeshow statistic was better with admission (chi2 = 18.2) and maximum Logistic Organ Dysfunction Score (chi2 = 19.6) than with admission (chi2 = 98.1) and maximum Multiple Organ Dysfunction Score (chi2 = 30.9). Brier Scores, indicating the overall performance of the scores, were 0.18, 0.17 and 0.22 for admission Sequential Organ Failure Assessment, Logistic Organ Dysfunction Score and Multiple Organ Dysfunction Score respectively, and 0.12, 0.10 and 0.15 for their maximum counterparts respectively. This study found good performance of both admission Sequential Organ Failure Assessment and Logistic Organ Dysfunction Score in severe sepsis, and a slightly weaker performance of admission Multiple Organ Dysfunction Score. Since poor calibration was observed in Logistic Organ Dysfunction Score and Multiple Organ Dysfunction Score, we suggest further study of customisation of these scores in critical illness with severe sepsis.
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206
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Didwaniya N, Edmonds RJ, Fang X, Silberstein PT, Subbiah S. Survival outcomes in metastatic renal carcinoma based on histological subtypes: SEER database analysis. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.7_suppl.381] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
381 Background: Renal cell cancer (RCC) represents a heterogeneous group of tumors with distinct histopathologic, genetic, and clinical features. This study was conducted to evaluate the prognostic value of histology in RCCs. Methods: 3,062 patients with metastatic RCC from year 1998-2007 were identified from Surveillance Epidemiology and End Results (SEER) database. Data regarding their age, sex, race, treatment modality utilized and cancer specific survival was extracted and analyzed. Results: Clear cell, sarcomatoid, adenocarcinoma NOS, papillary, collecting duct, chromophobe and cyst associated renal carcinoma accounted for 2,166 (70%), 433 (14%), 216 (7%), 160 (52%), 47 (1.5%), 35 (1.14%), and 5 (0.01%) respectively. The mean age of presentation was 63.5 in clear cell RCC and 62.7 years in non-clear cell RCC. Surgery was performed in 57.23% of all clear cell cancers and 50.84% in non-clear cell-RCC group. 27.34% of all clear cell cancer patients received radiation in contrast to 34.53% in the other group. Both clear cell RCC (64.54%) and non-clear cell RCC (69.52%) occurred commonly in males. Incidence of clear cell RCC was 4.67% in Asians, 7.01% in Blacks, 88.32% in Whites. The incidence of non-clear cell RCC was 3.81% in Asians, 14.78% in Blacks, and 81.41% in Whites. Cancer-specific survival was calculated in all histologic subtypes. Median survival for clear cell RCC was 8 months, 3 months for adenocarcinoma NOS, 7 months for cyst associated renal carcinoma, 8 months for papillary carcinoma, 7 months for chromophobe type, 4 months for sarcomatoid and 4 months for collecting duct RCC. Median overall survival was significantly better for clear cell cancer as compared to non-clear cell RCCs (8 months vs. 4 months; p< 0.0001). Conclusions: Non-clear histology RCCs represent 30% of metastatic RCC and are associated with poor prognosis when compared to clear cell RCC.While development of novel targeted therapies has improved survival in clear cell RCC, it has not made a impact in survival of non-clear RCCs. An indepth understanding of the genetic and molecular changes associated with non-clear cell RCCs is important to improve their prognosis. No significant financial relationships to disclose.
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207
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Sai AJ, Walters RW, Fang X, Gallagher JC. Relationship between vitamin D, parathyroid hormone, and bone health. J Clin Endocrinol Metab 2011; 96:E436-46. [PMID: 21159838 PMCID: PMC3047227 DOI: 10.1210/jc.2010-1886] [Citation(s) in RCA: 190] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
CONTEXT There is a controversy regarding the definition of vitamin D insufficiency as it relates to bone health. OBJECTIVE The objective of the study was to examine the evidence for a threshold value of serum 25-hydroxyvitamin D (25OHD) that defines vitamin D insufficiency as it relates to bone health. DESIGN AND PARTICIPANTS This was a cross-sectional analysis of baseline data in 488 elderly Caucasian women, mean age 71 yr, combined with a literature review of 70 studies on the relationship of serum PTH to serum 25OHD. SETTING The study was conducted in independent-living women in the midwest United States. MAIN OUTCOME MEASURE The relationship between serum 25OHD, serum PTH, and serum osteocalcin and 24-h urine N-telopeptides was evaluated. RESULTS Serum PTH was inversely correlated with serum 25OHD (r = -0.256, P < 0.0005), but no threshold as defined by suppression of serum PTH was found within the serum 25OHD range 6-60 ng/ml (15-150 nmol/liter). However, in contrast, there was a threshold for bone markers, serum osteocalcin and urine N-telopeptides, that increased only below a serum 25OHD of approximately 18 ng/ml (45 nmol/liter). Calcium absorption was not correlated with serum PTH and serum 25OHD, and no threshold was found. A literature review of 70 studies generally showed a threshold for serum PTH with increasing serum 25OHD, but there was no consistency in the threshold level of serum 25OHD that varied from 10 to 50 ng/ml (25-125 nmol/liter). CONCLUSIONS Vitamin D insufficiency should be defined as serum 25OHD less than 20 ng/ml (50 nmol/liter) as it relates to bone.
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Juhasz A, Sundaram A, Hoshino M, Lee T, Deng C, Fang X, Mittal S. Impact Of Histopathological Response To Neo-adjuvant Therapy On Survival And Disease Free Survival In Patients With Esophageal Adenocarcinoma. J Surg Res 2011. [DOI: 10.1016/j.jss.2010.11.165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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209
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Stellato C, Fang X, Abdelmohsen K, Gorospe M, Ishmael F. Glucocorticoid (GC) Modulation of Global miRNA Profile in Human Airway Epithelial Cells. J Allergy Clin Immunol 2011. [DOI: 10.1016/j.jaci.2010.12.267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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210
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Xu C, Xu G, Tu W, Wu X, Fang X, Huang T. Heparin and prednisone-associated priapism: two case reports. Andrologia 2011; 43:68-70. [PMID: 21219386 DOI: 10.1111/j.1439-0272.2009.01006.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Priapism is a prolonged penile erection that is not associated with sexual stimulation. In this report, two patients who developed priapism 2-4 h after an oral prednisone and intravenous heparin infusion are described. Low-flow (ischaemic) priapism is usually associated with sickle cell disease, haemoglobinopathies, neoplastic syndrome, anticoagulant therapy (heparin and warfarin), psychotropic medication, sildenafil citrate (Viagra) or idiopathic causes. Here we report two cases of prolonged low-flow priapism induced by heparin and prednisone. Treatments were successfully conducted after the priapism, while the exact mechanism remains unclear.
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211
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Tang X, Fang X, Bucher B, Esbensen H, Jiang C, Rehm K, Lin C. Upper Limit on the molecular resonance strengths in the 12C+ 12C fusion reaction. EPJ WEB OF CONFERENCES 2011. [DOI: 10.1051/epjconf/20111716016] [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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212
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Cain P, Srivastava P, Nidorf M, Disney P, Fang X, Holt G. Right Ventricular Systolic Pressures in Patients with Normal Left Ventricular Systolic Function—A Study of 51,429 Australian Echocardiograms. Heart Lung Circ 2011. [DOI: 10.1016/j.hlc.2011.05.470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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213
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Huang Y, Zhang E, Li Z, Wang J, Huai Y, Ma L, Chen F, Lan X, Lei C, Wang J, Fang X, Chen H. Six novel coding SNPs of the nucleophosmin 1 (<i>NPM1</i>) gene and their associations with growth traits in bovine (Brief Report). Arch Anim Breed 2010. [DOI: 10.5194/aab-53-368-2010] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Abstract. The Nucleophosmin 1 (NPM1) gene encodes a multifunctional nucleolar phosphoprotein that has crucial roles in the control of different aspects of cell growth and homeostasis, such as ribosome biogenesis, centrosome duplication, cell cycle progression, apoptosis and cell differentiation (GRISENDI et al. 2006, NAOE et al. 2006). As mutants of NPM1 gene impact protein synthesis, NPM1 is an essential protein in mouse development and cell growth (MAGGI et al. 2008). The bovine NPM1 gene contains one exon and locates at chromosome 9. In previous work, the 12-bp deletion was detected in bovine NPM1 gene coding region. (HUANG et al. 2010). In this study, the coding region of bovine NPM1 gene has been scanned by PCR-SSCP, DNA sequencing and forced PCR-RFLP methods for SNPs in 1 032 individuals belonging to four Chinese cattle breeds. Association of six mutations of NPM1 gene with growth traits was analyzed.
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214
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Sun J, Gu C, Zhang C, Lei C, Fang X, Jin Q, Chen D, Shi X, Du Y, Chen H. Association of polymorphisms of the <i>DCN</i> gene with growth traits in cattle (Brief Report). Arch Anim Breed 2010. [DOI: 10.5194/aab-53-119-2010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Abstract. Mammalian decorin (DCN) consists of a protein core and a single dermatan or chondroitin sulfate glycosaminoglycan chain (CHOPRA et al. 1985), contributing multifunctionally to processes like matrix assembly, modulation of the activity of growth factors and cell migration and proliferation. Recently, LINDA et al. (2008) have reported that eight SNPs were identified in human. However, the related information in bovine is scarce. Hence, in the present experiment the exons and intron/exon boundaries of DCN were scanned for SNPs in the predominant cattle breeds of China.
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Parekh A, Campbell AJM, Djouhri L, Fang X, McMullan S, Berry C, Acosta C, Lawson SN. Immunostaining for the α3 isoform of the Na+/K+-ATPase is selective for functionally identified muscle spindle afferents in vivo. J Physiol 2010; 588:4131-43. [PMID: 20807787 PMCID: PMC3002446 DOI: 10.1113/jphysiol.2010.196386] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Abstract
Muscle spindle afferent (MSA) neurons can show rapid and sustained firing. Immunostaining for the α3 isoform of the Na+/K+-ATPase (α3) in some large dorsal root ganglion (DRG) neurons and large intrafusal fibres suggested α3 expression in MSAs (Dobretsov et al. 2003), but not whether α3-immunoreactive DRG neuronal somata were exclusively MSAs. We found that neuronal somata with high α3 immunointensity were neurofilament-rich, suggesting they have A-fibres; we therefore focussed on A-fibre neurons to determine the sensory properties of α3-immunoreactive neurons. We examined α3 immunointensity in 78 dye-injected DRG neurons whose conduction velocities and hindlimb sensory receptive fields were determined in vivo. A dense perimeter or ring of staining in a subpopulation of neurons was clearly overlying the soma membrane and not within satellite cells. Neurons with clear α3 rings (n = 23) were all MSAs (types I and II); all MSAs had darkly stained α3 rings, that tended to be darker in MSA1 than MSA2 units. Of 52 non-MSA A-fibre neurons including nociceptive and cutaneous low-threshold mechanoreceptive (LTM) neurons, 50 had no discernable ring, while 2 (Aα/β cutaneous LTMs) had weakly stained rings. Three of three C-nociceptors had no rings. MSAs with strong ring immunostaining also showed the strongest cytoplasmic staining. These findings suggest that α3 ring staining is a selective marker for MSAs. The α3 isoform of the Na+/K+-ATPase has previously been shown to be activated by higher Na+ levels and to have greater affinity for ATP than the α1 isoform (in all DRG neurons). The high α3 levels in MSAs may enable the greater dynamic firing range in MSAs.
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Lam EKK, Batty GD, Huxley RR, Martiniuk ALC, Barzi F, Lam TH, Lawes CMM, Giles GG, Welborn T, Ueshima H, Tamakoshi A, Woo J, Kim HC, Fang X, Czernichow S, Woodward M. Associations of diabetes mellitus with site-specific cancer mortality in the Asia-Pacific region. Ann Oncol 2010; 22:730-738. [PMID: 20705912 DOI: 10.1093/annonc/mdq405] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Owing to the increasing prevalence of obesity and diabetes in Asia, and the paucity of studies, we examined the influence of raised blood glucose and diabetes on cancer mortality risk. MATERIALS AND METHODS Thirty-six cohort Asian and Australasian studies provided 367, 361 participants (74% from Asia); 6% had diabetes at baseline. Associations between diabetes and site-specific cancer mortality were estimated using time-dependent Cox models, stratified by study and sex, and adjusted for age. RESULTS During a median follow-up of 4.0 years, there were 5992 deaths due to cancer (74% Asian; 41% female). Participants with diabetes had 23% greater risk of mortality from all-cause cancer compared with those without: hazard ratio (HR) 1.23 [95% confidence interval (CI) 1.12, 1.35]. Diabetes was associated with mortality due to cancer of the liver (HR 1.51; 95% CI 1.19, 1.91), pancreas (HR 1.78; 95% CI 1.20, 2.65), and, less strongly, colorectum (HR 1.32; 95% CI 0.98, 1.78). There was no evidence of sex- or region-specific differences in these associations. The population attributable fractions for cancer mortality due to diabetes were generally higher for Asia compared with non-Asian populations. CONCLUSION Diabetes is associated with increased mortality from selected cancers in Asian and non-Asian populations.
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217
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Adachi T, Huxtable AG, Fang X, Funk GD. Substance P Modulation of Hypoglossal Motoneuron Excitability During Development: Changing Balance Between Conductances. J Neurophysiol 2010; 104:854-72. [DOI: 10.1152/jn.00016.2010] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Although Substance P (SP) acts primarily through neurokinin 1 (NK1) receptors to increase the excitability of virtually all motoneurons (MNs) tested, the ontogeny of this transmitter system is not known for any MN pool. Hypoglossal (XII) MNs innervate tongue protruder muscles and participate in several behaviors that must be functional from birth including swallowing, suckling and breathing. We used immunohistochemistry, Western immunoblotting, and whole cell recording of XII MNs in brain stem slices from rats ranging in age from postnatal day zero (P0) to P23 to explore developmental changes in: NK1 receptor expression; currents evoked by SPNK1 (an NK1-selective SP receptor agonist) and; the efficacy of transduction pathways transforming ligand binding into channel modulation. Despite developmental reductions in XII MN NK1 receptor expression, SPNK1 current density remained constant at 6.1 ± 1.0 (SE) pA/pF. SPNK1 activated at least two conductances. Activation of a pH-insensitive Na+ conductance dominated in neonates (P0–P5), but its contribution fell from ∼80 to ∼55% in juveniles (P14–P23). SPNK1 also inhibited a pH-sensitive, two-pore domain K+ (TASK)-like K+ current. Its contribution increased developmentally. First, the density of this pH-sensitive K+ current doubled between P0 and P23. Second, SPNK1 did not affect this current in neonates, but reduced it by 20% at P7–P10 and 80% in juveniles. In addition, potentiation of repetitive firing was greatest in juveniles. These data establish that despite apparent reductions in NK1 receptor density, SP remains an important modulator of XII MN excitability throughout postnatal development due, in part, to increased expression of a pH-sensitive, TASK-like conductance.
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218
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Jin Y, Zhang Y, Wang H, Wu S, Chen Q, Cheng B, Xie G, Hu Y, Fang X. Genomic polymorphisms within alpha 7 nicotinic acetylcholine receptor and severe sepsis in Chinese Han population. Int J Immunogenet 2010; 37:361-5. [PMID: 20518839 DOI: 10.1111/j.1744-313x.2010.00933.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Alpha 7 nicotinic acetylcholine receptor, a kind of ligand-gated ion channel mainly expressed in macrophages, plays a crucial role in improving survival in sepsis via suppressing proinflammatory cytokines. The predisposition of genomic polymorphisms within alpha 7 nicotinic acetylcholine receptor gene (CHRNA7) to sepsis has not been investigated. The current association study was performed to analyse six common genetic variations within 5'-upstream region of CHRNA7 gene in 229 patients with severe sepsis and 267 controls. Neither allelic frequencies nor genotype distributions were significantly different between patients and controls, as well as between surviving and nonsurviving patients. The frequencies of estimated haplotypes were also comparable between above defined groups. The present study suggests that genomic polymorphisms in the 5'-upstream region of CHRNA7 gene may not be a major risk factor for severe sepsis in Chinese Han population.
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219
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Schröder C, Fang X, Furukawa Y, Luban M, Prozorov R, Borsa F, Kumagai K. Spin freezing and slow magnetization dynamics in geometrically frustrated magnetic molecules with exchange disorder. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:216007. [PMID: 21393733 DOI: 10.1088/0953-8984/22/21/216007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We show that intramolecular exchange disorder recently found in the geometrically frustrated magnetic molecules {Mo(72)Fe(30)} and {Mo(72)Cr(30)} leads, in a classical Heisenberg model description, to spin freezing and slow magnetization dynamics reminiscent of spin glass behaviour. Also we suggest that our low temperature and low magnetic field nuclear magnetic resonance (NMR) measurements on {Mo(72)Fe(30)}, showing rapid and strong broadening of the proton line width on cooling below 600 mK, are evidence for a crossover from paramagnetic behaviour to a frozen spin configuration. Similar broadening is observed in {Mo(72)Cr(30)}. This observed effect is consistent with our theory of spin freezing and slow magnetization dynamics in these systems due to exchange disorder.
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220
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Crockett D, Gonsalves W, Tashi T, Aldoss I, Sama AR, Al-Howaidi I, Fang X, Townley P, Subbiah S, Silberstein PT. Racial disparities in stage II prostate cancer outcomes in the Veterans Affairs hospital system. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.6119] [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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221
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Sama AR, Gonsalves W, Fang X, Lynch HT, Thome S. Incidence of early-onset multiple myeloma among families with endometrial carcinoma. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.1583] [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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222
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Xu G, Liu X, Zheng L, Fang X, Yin Q. Successful Recanalization of a Chronic In-stent Occlusion at the Vertebral Artery Ostium. A Case Report. Interv Neuroradiol 2010; 15:462-5. [PMID: 20465887 DOI: 10.1177/159101990901500416] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2009] [Accepted: 10/11/2009] [Indexed: 11/16/2022] Open
Abstract
SUMMARY In-stent restenosis or occlusion has been frequently reported as a complication after angioplasty and stenting in vertebral arteries. Reopening chronic in-stent occlusion in cervical arteries with endovascular techniques has not been reported. Here we describe a case with stent implantation in the origin of right vertebral artery. The stent was occluded one year after the procedure. The patient demonstrated concurrent ischemic symptoms which were relieved after the in-stent occlusion being recanalized successfully with re-angioplasty.
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223
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Fang X, Liao CR, Wang DN. Femtosecond laser fabricated fiber Bragg grating in microfiber for refractive index sensing. OPTICS LETTERS 2010; 35:1007-1009. [PMID: 20364199 DOI: 10.1364/ol.35.001007] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Fiber Bragg grating (FBG) is fabricated in the microfiber by the use of femtosecond laser pulse irradiation. Such a grating can be directly exposed to the surrounding medium without etching or thinning treatment of the fiber, thus possessing high refractive index (RI) sensitivity while maintaining superior reliability. The grating in the microfiber may have a number of propagation modes in its transmission spectrum, depending on the fiber diameter, and the higher order of mode has larger RI sensitivity. The RI sensitivity also depends on the fiber diameter and a smaller diameter corresponds to a large sensitivity. The maximum sensitivity obtained is approximately 231.4 nm per refractive index unit at the refractive index value of approximately 1.44 when the fiber diameter is approximately 2 microm. The FBG fabricated in the microfiber has high potential in various types of optical fiber sensor applications.
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Johnson SA, Stinson BM, Go MS, Carmona LM, Reminick JI, Fang X, Baumgart T. Temperature-dependent phase behavior and protein partitioning in giant plasma membrane vesicles. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2010; 1798:1427-35. [PMID: 20230780 DOI: 10.1016/j.bbamem.2010.03.009] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2009] [Revised: 02/08/2010] [Accepted: 03/05/2010] [Indexed: 11/15/2022]
Abstract
Liquid-ordered (Lo) and liquid-disordered (Ld) phase coexistence has been suggested to partition the plasma membrane of biological cells into lateral compartments, allowing for enrichment or depletion of functionally relevant molecules. This dynamic partitioning might be involved in fine-tuning cellular signaling fidelity through coupling to the plasma membrane protein and lipid composition. In earlier work, giant plasma membrane vesicles, obtained by chemically induced blebbing from cultured cells, were observed to reversibly phase segregate at temperatures significantly below 37 degrees C. In this contribution, we compare the temperature dependence of fluid phase segregation in HeLa and rat basophilic leukemia (RBL) cells. We find an essentially monotonic temperature dependence of the number of phase-separated vesicles in both cell types. We also observe a strikingly broad distribution of phase transition temperatures in both cell types. The binding of peripheral proteins, such as cholera toxin subunit B (CTB), as well as Annexin V, is observed to modulate phase transition temperatures, indicating that peripheral protein binding may be a regulator for lateral heterogeneity in vivo. The partitioning of numerous signal protein anchors and full length proteins is investigated. We find Lo phase partitioning for several proteins assumed in the literature to be membrane raft associated, but observe deviations from this expectation for other proteins, including caveolin-1.
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Yan KX, Fang X, Han L, Zhang ZH, Kang KF, Zheng ZZ, Huang Q. Foxp3+ regulatory T cells and related cytokines differentially expressed in plaque vs. guttate psoriasis vulgaris. Br J Dermatol 2010; 163:48-56. [PMID: 20222932 DOI: 10.1111/j.1365-2133.2010.09742.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Differences in the number of Foxp3+ regulatory T cells (Tregs) in lesional skin and peripheral blood and their functioning in plaque vs. guttate psoriasis have not been reported. OBJECTIVES To investigate whether there is a differential expression of Foxp3+ Tregs and a differential regulation of inflammatory cytokines in plaque vs. guttate psoriasis vulgaris. METHODS The number and the percentage of Foxp3+ cells in different phases of skin lesions of patients with plaque and guttate psoriasis vulgaris were assessed by immunohistochemical staining. The expression of Foxp3 and interleukin (IL)-17 protein in CD4 populations was measured by flow cytometry. Inflammatory cytokine production by transforming growth factor-beta1-induced Foxp3+ Tregs was assessed in an in vitro study. The cytokines in supernatant and serum were determined by enzyme-linked immunosorbent assay. RESULTS The percentage of Foxp3+ CD3+ cells in the papillary layer was higher than in the reticular layer of dermis and in epidermis (P < 0.05). The numbers of Foxp3+ Tregs in skin lesions and peripheral blood were higher in plaque than in guttate psoriasis, whereas the percentage of IL-17+ CD4+ cells was higher in guttate than in plaque psoriasis (P < 0.05). The numbers of Foxp3+ cells were positively correlated with the Psoriasis Severity Index score of skin lesions (P < 0.0001), and the percentages of Foxp3+ CD4+ cells in peripheral blood were positively correlated with the Psoriasis Area and Severity Index score of patients (P < 0.05). The inhibitory functions of Tregs to IL-17 and IL-6 in guttate psoriasis and to tumour necrosis factor-alpha in plaque psoriasis were deficient. CONCLUSIONS Differential expression and regulatory functioning for inflammatory cytokine production by Foxp3+ Tregs may imply a different immunopathogenesis for plaque and guttate psoriasis.
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