426
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Su N, Zhang L, Fei F, Hu H, Wang K, Hui H, Jiang XF, Li X, Zhen HN, Li J, Cao BP, Dang W, Qu Y, Zhou F. The brain-derived neurotrophic factor is associated with alcohol dependence-related depression and antidepressant response. Brain Res 2011; 1415:119-26. [PMID: 21880305 DOI: 10.1016/j.brainres.2011.08.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2011] [Revised: 07/14/2011] [Accepted: 08/03/2011] [Indexed: 11/30/2022]
Abstract
Brain-derived neurotrophic factor (BDNF) plays an essential role in neuronal survival, proliferation, and synaptic remodeling and modulates the function of many other neurotransmitters. Additionally, it likely underlies neurodegenerative and psychiatric disorders, including alcohol dependence-related depression (AD-D). Here, we investigated the possible association between three single nucleotide polymorphisms (SNPs) of the BDNF gene (rs13306221, rs6265, rs16917204) and AD-D. Of 548 patients with alcohol dependence (AD), 166 had AD-D and 312 healthy controls. Response to 8-week sertraline treatment was also assessed. The frequency of the A allele of rs6265 (Val66Met) was significantly higher in AD-D patients than in the healthy controls (p=0.009 after Bonferroni correction). The analysis revealed a strong association between the rs6265 genotype distribution and AD-D (p=0.005 after Bonferroni correction), and the A allele of rs6265 was significantly overrepresented in AD-D patients compared to AD without depression (AD-nD) patients (p=0.001 after Bonferroni correction). Additionally, carriers of the A allele of rs6265 responded better to sertraline treatment (p=0.001). Our results suggested a novel association between BDNF rs6265 and AD-D. These findings might lead to earlier detection of AD-D, perhaps providing better tools for clinical care of these patients in the future.
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427
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Deng S, van den Ende AHGG, Ram AFJ, Arentshorst M, Gräser Y, Hu H, de Hoog GS. Evolution of CDC42, a putative virulence factor triggering meristematic growth in black yeasts. Stud Mycol 2011; 61:121-9. [PMID: 19287534 PMCID: PMC2610298 DOI: 10.3114/sim.2008.61.12] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
The cell division cycle gene (CDC42) controlling cellular
polarization was studied in members of Chaetothyriales. Based on
ribosomal genes, ancestral members of the order exhibit meristematic growth in
view of their colonization of inert surfaces such as rock, whereas in derived
members of the order the gene is a putative virulence factor involved in
expression of the muriform cell, the invasive phase in human
chromoblastomycosis. Specific primers were developed to amplify a portion of
the gene of 32 members of the order with known position according to ribosomal
phylogeny. Phylogeny of CDC42 proved to be very different. In all
members of Chaetohyriales the protein sequence is highly conserved.
In most species, distributed all over the phylogenetic tree, introns and
3rd codon positions are also invariant. However, a number of
species had paralogues with considerable deviation in non-coding exon
positions, and synchronous variation in introns, although non-synonomous
variation had remained very limited. In some strains both orthologues and
paralogues were present. It is concluded that CDC42 does not show any
orthologous evolution, and that its paralogues haves the same function but are
structurally relaxed. The variation or absence thereof could not be linked to
ecological changes, from rock-inhabiting to pathogenic life style. It is
concluded that eventual pathogenicity in Chaetothyriales is not
expressed at the DNA level in CDC42 evolution.
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428
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Hu QN, Deng Z, Hu H, Cao DS, Liang YZ. RxnFinder: biochemical reaction search engines using molecular structures, molecular fragments and reaction similarity. Bioinformatics 2011; 27:2465-7. [DOI: 10.1093/bioinformatics/btr413] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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429
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Yue X, Hu H, Koetsier M, Graaff R, Han C. Reference values for the Chinese population of skin autofluorescence as a marker of advanced glycation end products accumulated in tissue. Diabet Med 2011; 28:818-23. [PMID: 21204956 DOI: 10.1111/j.1464-5491.2010.03217.x] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIM Advanced glycation end products play an important role in the pathophysiology of several chronic and age-related diseases, especially diabetes mellitus. Skin autofluorescence is a non-invasive method for assessing levels of tissue advanced glycation end products. This study aims to establish the normal reference value of advanced glycation end products accumulated in tissue measured by the advanced glycation end product reader--skin autofluorescence--and discusses some factors influencing it. METHODS The values of autofluorescence in healthy individuals in China were determined by the advanced glycation end product reader; age, gender, skin reflectance, smoking habits and alcohol consumption of the subjects were also recorded. RESULTS The mean reference values of autofluorescence in healthy Chinese subjects are (95% confidence interval) 20-29 years: 1.54-1.62 arbitrary units; 30-39 years: 1.66-1.75; 40-49 years: 1.78-1.89; 50-59 years: 1.87-2.03; 60-69 years: 1.86-2.09; 70-79 years: 1.97-2.31. The value of autofluorescence is strongly related to age, but no significant difference between males and females were found (all P > 0.05). Autofluorescence was higher in smokers than in non-smokers (P < 0.05). In persons with low skin reflectance (< 10%), skin autofluorescence was dependent on skin colour, but was still related to age. CONCLUSIONS The mean reference values of autofluorescence we established could be used for a Chinese population in a clinical setting and are agreement with those in a Caucasian population. Future developments are needed to make the advanced glycation end product reader reliable for lower skin reflections as well, independently of the skin colour.
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430
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Deng S, Hu H, Abliz P, Wan Z, Wang A, Cheng W, Li R. A random comparative study of terbinafine versus griseofulvin in patients with tinea capitis in Western China. Mycopathologia 2011; 172:365-72. [PMID: 21701791 DOI: 10.1007/s11046-011-9438-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2010] [Accepted: 06/08/2011] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To compare the efficacy and safety of terbinafine with griseofulvin in the treatment of tinea capitis in Western China. METHODS Children (2-14 years of age) with clinically diagnosed and potassium hydroxide microscopy-confirmed tinea capitis were randomized into three groups: group GRI4 received 4 weeks of griseofulvin; group TBF2 received 2 weeks of terbinafine; and Group TBF4 received 4 weeks of terbinafine. Clinical and mycological evaluations were done in 0, 2, 4, and 8 weeks and 1 year after therapy started. The isolated pathogenic fungi were evaluated for in vitro susceptibility by detecting the minimal inhibitory concentration (MIC) against terbinafine, griseofulvin, itraconazole, and ketoconazole. RESULTS The clinical effectiveness rate of GRI4, TBF2, and TBF4 were 100% (95% CI-confidence interval: 82-100%), 96.3% (95% CI: 81-100%), and 100%(95% CI: 85-100%), respectively, at week 8 and 100% after 1 year for the 3 groups; clinical cure rates were 84.2%(95% CI: 77-99%), 85.2%(95% CI: 71-98%), and 78.3%(95% CI: 61-95%), respectively, at week 8 and 100% after 1 year for all agents; mycological cure rates were 100%(95% CI: 74-100%), 95.0%(95% CI: 74-100%), and 94.1%(95% CI: 50-93%) at week 8 and 100% after 1 year for the 3 groups. In vitro, all patient-derived cultures were sensitive to the four antifungal agents. CONCLUSION Data from the clinical trial and in vitro antifungal activity indicated that terbinafine is efficacious and well tolerated in the treatment for Trichophyton infections (T. violaceum; Arthroderma vanbreuseghemii; and T. tonsurans) of the scalp, i.e., a 2- to 4-week course of terbinafine is as effective as a 4-week course of griseofulvin; in fact, a 2-week course of terbinafine is sufficient. Terbinafine is an effective alternative to griseofulvin against tinea capitis of Trichophyton infections.
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Foody J, Toth P, Sajjan S, Ramey D, Neff D, Tershakovec A, Hu H, Tomassini J, Tunceli K. 80 CHANGES IN LDL-C LEVELS AND GOAL ATTAINMENT ASSOCIATED WITH ADDING EZETIMIBE ONTO SIMVASTATIN, ATORVASTATIN AND ROSUVASTATIN COMPARED WITH TITRATING STATINS. ATHEROSCLEROSIS SUPP 2011. [DOI: 10.1016/s1567-5688(11)70081-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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432
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Zhang S, Liu Y, Li Q, Dong X, Hu H, Hu R, Ye H, Wu Y, Hu R, Li Y. Exercise improved rat metabolism by raising PPAR-α. Int J Sports Med 2011; 32:568-73. [PMID: 21618160 DOI: 10.1055/s-0031-1271755] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Based on the importance of exercise and crucial role of liver in metabolism, the aim of this study was to determine whether the expression of peroxisome proliferator-activated receptor (PPAR)-α, γ and adiponectin receptor 2 in OLETF rat liver were altered in conjunction with improved metabolism with exercise training. OLETF rats were randomly assigned to 2 groups: sedentary control group (n=26), and long-term exercise-trained group (n=26). Full data were available on 32 OLETF rats (16 for each group). Adiponectin, glucose, insulin, triglyceride and cholesterol were assessed. Livers were taken to determine the expression of PPAR-α, γ and adiponectin receptor 2. Compared with sedentary control group, fasting glucose (9.38 ± 2.99 mmol/L vs. 7.32 ± 1.76 mmol/L, P<0.05), triglyceride (1.73 ± 0.34 mmol/L vs. 0.89 ± 0.12 mmol/L, P<0.05) and cholesterol (4.41 ± 0.75 mmol/L vs. 2.13 ± 0.32 mmol/L, P<0.05) were substantially reduced after exercise, which significantly correlated with increased PPAR-α (P<0.05) in liver. The expression of PPAR-α upstream and target genes, including hepatocyte nuclear factor-4 (HNF4), carnitine palmitoyl transferase 1 (CPT-1), catalase (CAT) and ATPbinding cassette transporter A1 (ABCA1) also increased significantly. Therefore, our findings suggest that increased PPAR-α expression in OLETF rats liver is a contributory factor to the exercise-related improvements in whole-body metabolism.
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433
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Hershman DL, Cheung AM, Chapman JW, Ingle JN, Ahmed F, Hu H, Scher J, Leeson S, Elliott C, Le Maitre A, Shepherd LE, Goss PE. Effects of adjuvant exemestane versus anastrozole on bone mineral density: Two-year results of the NCIC CTG MA.27 bone companion study. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.518] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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434
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Kuhnle ED, Hoinka S, Dyke P, Hu H, Hannaford P, Vale CJ. Temperature dependence of the universal contact parameter in a unitary Fermi gas. PHYSICAL REVIEW LETTERS 2011; 106:170402. [PMID: 21635019 DOI: 10.1103/physrevlett.106.170402] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2010] [Indexed: 05/30/2023]
Abstract
The contact I, introduced by Tan, has emerged as a key parameter characterizing universal properties of strongly interacting Fermi gases. For ultracold Fermi gases near a Feshbach resonance, the contact depends upon two quantities: the interaction parameter 1/(k(F)a), where k(F) is the Fermi wave vector and a is the s-wave scattering length, and the temperature T/T(F), where T(F) is the Fermi temperature. We present the first measurements of the temperature dependence of the contact in a unitary Fermi gas using Bragg spectroscopy. The contact is seen to follow the predicted decay with temperature and shows how pair-correlations at high momentum persist well above the superfluid transition temperature.
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435
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Zhang H, Li Y, Huang Q, Ren X, Hu H, Sheng H, Lai M. MiR-148a promotes apoptosis by targeting Bcl-2 in colorectal cancer. Cell Death Differ 2011; 18:1702-10. [PMID: 21455217 DOI: 10.1038/cdd.2011.28] [Citation(s) in RCA: 168] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Apoptosis has a vital role in maintaining tissue homeostasis, and dysregulation of the apoptotic pathway is now widely recognized as a key step in tumourigenesis. Increasingly, evidence has demonstrated that microRNA (miRNA) can exert various biological functions in tumours by targeting oncogenes or tumour suppressors. Nevertheless, the role of miRNA in apoptosis remains unclear. Here we show that ectopical expression of miR-148a can induce apoptosis in colorectal cancer cells. In addition, MYB can inhibit miR-148a by directly acting on the transcription factor binding site in miR-148a gene and miR-148a can posttranscriptionally silence Bcl-2. Subsequently, the intrinsic apoptosis pathway is activated by releasing cytochrome c, cleaving caspase 9, caspase 3 and PARP, which eventually induce cancer-cell apoptosis. These findings are part of a hitherto undocumented apoptotic regulatory pathway in which a pleiotropic transcription factor controls the expression of a miRNA and the miRNA inhibits the target, leading to activation of an intrinsic mitochondrial pathway and tumour apoptosis.
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436
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Dyke P, Kuhnle ED, Whitlock S, Hu H, Mark M, Hoinka S, Lingham M, Hannaford P, Vale CJ. Crossover from 2D to 3D in a weakly interacting Fermi gas. PHYSICAL REVIEW LETTERS 2011; 106:105304. [PMID: 21469801 DOI: 10.1103/physrevlett.106.105304] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2010] [Revised: 01/11/2011] [Indexed: 05/30/2023]
Abstract
We have studied the transition from two to three dimensions in a low temperature weakly interacting 6Li Fermi gas. Below a critical atom number N(2D) only the lowest transverse vibrational state of a highly anisotropic oblate trapping potential is occupied and the gas is two dimensional. Above N(2D) the Fermi gas enters the quasi-2D regime where shell structure associated with the filling of individual transverse oscillator states is apparent. This dimensional crossover is demonstrated through measurements of the cloud size and aspect ratio versus atom number.
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Cigler T, Richardson H, Yaffe MJ, Fabian CJ, Johnston D, Ingle JN, Nassif E, Brunner RL, Wood ME, Pater JL, Hu H, Qi S, Tu D, Goss PE. A randomized, placebo-controlled trial (NCIC CTG MAP.2) examining the effects of exemestane on mammographic breast density, bone density, markers of bone metabolism and serum lipid levels in postmenopausal women. Breast Cancer Res Treat 2011; 126:453-61. [PMID: 21221773 DOI: 10.1007/s10549-010-1322-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2010] [Accepted: 12/19/2010] [Indexed: 01/14/2023]
Abstract
We hypothesized that exemestane (EXE) would reduce mammographic breast density and have unique effects on biomarkers of bone and lipid metabolism. Healthy postmenopausal women were randomized to EXE (25 mg daily) or placebo (PLAC) for 12 months and followed for a total of 24 months. The primary endpoint was change in percent breast density (PD) between the baseline and 12-month mammograms and secondary endpoints were changes in serum lipid levels, bone biomarkers, and bone mineral density (BMD). Ninety-eight women were randomized (49 to EXE; 49 to PLAC) and 65 had PD data at baseline and 12 months. Among women treated with EXE, PD was not significantly changed from baseline at 6, 12, or 24 months and was not different from PLAC. EXE was associated with significant percentage increase from baseline in N-telopeptide at 12 months compared with PLAC. No differences in percent change from baseline in BMD (lumbar spine and femoral neck) were observed between EXE and PLAC at either 12 or 24 months. Patients on EXE had a significantly larger percent decrease in total cholesterol than in the PLAC arm at 6 months and in HDL cholesterol at 3, 6, and 12 months. No significant differences in percent change in LDL or triglycerides were noted at any time point between the two treatment arms. EXE administered for 1 year to healthy postmenopausal women did not result in significant changes in mammographic density. A reversible increase in the bone resorption marker N-telopeptide without significant change in bone specific alkaline phosphatase or BMD during the 12 months treatment period and 1 year later was noted. Changes in lipid parameters on this trial were modest and reversible.
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438
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Bekhash A, Saini J, Li X, Rapuri P, Hooke JA, Kovatich AJ, Mural RJ, Shriver CD, Hu H. Abstract P3-13-02: Ethnicity Difference of Benign Breast Diseases in Breast Cancer and Non-Cancer Patients. Cancer Res 2010. [DOI: 10.1158/0008-5472.sabcs10-p3-13-02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Breast cancer (BC) is a heterogeneous disease. Ethnicity differences in BC for Caucasian (CA) and African American (AA) women have been reported, but there is no report on ethnicity differences in benign breast diseases (BBDs) though it is known that BBDs may be precursors or risk factors of BCs. In the Clinical Breast Care Project (CBCP), a comprehensive characterization of BBDs performed on breast biopsies makes it possible to conduct a study on the ethnicity difference of BBDs between CA and AA, in the Cancer and Non-Cancer groups respectively.
Method: CA and AA patients undergoing a biopsy were selected from CBCP, totaling 1,963. A Pathology Checklist is available, reporting 131 pathologic conditions including 83 BBDs. In addition, a Core Questionnaire covering information such as demographics, medical history, risk factors, life style, etc. is completed. The Cancer group is composed of 731 CAs and 170 AAs (including in situ, invasive, and malignant NOS), and the Non-Cancer group is composed of 748 CAs and 314 AAs. BBDs with a frequency of <1% in each group were removed from the study leaving a total of 26 BBDs analyzed for the Cancer and 25 BBDs for the Non-Cancer groups. Pearson's Chi-square test was used to analyze statistical significance.
Results: The Cancer group showed 6 BBDs significantly associated with the ethnicity; 2 were more frequent in CA, i.e., fat necrosis (5.5% CA vs. 0.6% AA, p =0.011), and mild intraductal hyperplasia (6.8% CA vs. 2.4% AA, p= 0.041). The other 4 BBDs were more frequently observed in AA, which were cysts (47.2% CA vs 56.5% AA, p=0.036), multiple papillomas (8.3% CA vs 15.9% AA, p=0.005), moderate intraductal hyperplasia (18.1% CA vs 28.2% AA, p=0.004), and fibroadenomatoid nodule (5.3% CA 11.8% AA, p= 0.004). These BBDs were not significantly different in the Non-Cancer group between the two ethnicities. Six BBDs were significantly associated with the ethnicity in the Non-Cancer group. Four of them were more frequent in CA, including duct ectasia (9.5% CA vs. 3.2% AA, p=0.001), microcalcifications (35.3% CA vs. 27.4% AA, p=0.015), fibocystic changes (61.0% CA vs. 44.6% AA, p= 1.30E-06), and sclerosing adenosis (21.7% CA vs. 13.4% AA, p=0.002). The other 2 BBDs were more frequent in AA, i.e., sclerosing papilloma (0.7% CA vs 2.6% AA, p=0.025), and fibroadenoma (20.9% CA vs 29.9% AA, p=0.002). These BBDs were not significantly different in the Cancer group between the two ethnicities, for example microcalcifications were 50.1% in CA and 55.9% in AA.
Discussion: Multiple papillomas and moderate intraductal hyperplasia are moderate risk factors for BC, and in the Cancer group they were more frequently detected in AA than in CA. Microcalcification as a BC risk factor did not show ethnicity difference in the Cancer group, but was detected more frequently in CA in the Non-Cancer group. It is interesting that not a single BBD was found to be significantly associated with the ethnicity (AA and CA) across the Cancer and the Non-Cancer groups. Thus, the ethnicity difference of BBDs in AA and CA reported here not only suggests possible ethnicity-specific BC risk factors but also generates new hypotheses for future studies.
Citation Information: Cancer Res 2010;70(24 Suppl):Abstract nr P3-13-02.
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Saini J, Li X, Kvecher L, Larson C, Croft D, Yang YC, Hooke JA, Shriver CD, Mural RJ, Hu H. Abstract P3-01-04: Differential Gene Expression Analysis among Post-Menopausal Caucasian Invasive Breast Cancer, Benign and Normal Subjects. Cancer Res 2010. [DOI: 10.1158/0008-5472.sabcs10-p3-01-04] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Breast Cancer (BC) is the second leading cause of cancer death among women in United States. There have been studies aiming to develop a blood-based BC detection assay, but most were focused on comparing blood samples between BC and normal subjects. Including benign disease patients in the study is critical in developing a BC detection assay. In addition, BC is a heterogeneous disease with distinct characteristics being associated with ethnicity and menopausal status. Thus we designed a study to analyze gene expression, in peripheral blood samples from invasive BC, benign disease and normal subjects, stratified by menopausal status and ethnicity. Here we report the results from Caucasian postmenopausal women.
Method: Subjects were selected from the Clinical Breast Care Project (CBCP). Microarray data using Affymetrix GeneChip Human Genome U133 plus 2.0 arrays, of peripheral blood samples from pathologically confirmed invasive BC (n= 17) and benign patients (n= 17) were compared to those from normal subjects (n=17). All subjects were postmenopausal Caucasian women, matched for age. Using GenespringGX 11.0 software, the data were normalized, and QC on hybridization and internal controls were performed before filtering out probesets with the lowest 20% signal intensity in each array. Asymptotic t-test with FDR correction was used and significant pathways were obtained.
Results: Comparison of gene expression in invasive BC patients (mean±SD = 63.7±7.0 years old) vs. normal subjects (mean±SD = 63.2±7.4 years) identified 1102 significantly different genes, satisfying the thresholds of corrected p < 0.05 and Fold Change (FC) > 1.5. Of them, 1003 genes were up regulated and 99 genes were down regulated in BC patients. Comparison of gene expression in benign disease women (mean±SD = 61.4±10.4 years) vs. normal women showed 1320 significantly different genes (corrected p < 0.05, FC > 1.5), with 1121 genes being up regulated and 199 genes being down regulated in benign patients. Of the top 10 genes with highest FC values, 6 genes (MBNL1, FAR1, MDM4, ITGA4, RAB8B, and EXOC5) were common in both analyses and were up regulated. NOTCH pathway was up regulated in both benign (p=0.038) and invasive (p=0.042) groups. Similarly, IL-7 pathway was up regulated in both benign (p=0.047) and invasive (p=0.030) patients. TCR pathway (p=7.36E-04) was up regulated in benign group only. The benign vs. invasive BC subjects did not show significant differential gene expression.
Discussion: Our results provide a list of differentially expressed genes that are mostly up regulated in invasive and benign patients vs. normal subjects. NOTCH pathway is involved in cell-cell communication and angiogenesis. IL7 pathways play an important role in immune system response, cell proliferation and cell survival signaling. TCR pathway is highly significant only in benign patients and stimulation of TCR pathway induces a signaling cascade that ultimately results in activation of induced cell death. This activation could be early body response to prevent cancer development in benign subjects. When more microarray analyses are completed for this study, we hope to obtain a better understanding of the possibility of developing a blood-based BC detection assay.
Citation Information: Cancer Res 2010;70(24 Suppl):Abstract nr P3-01-04.
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Hu H, Faratian D, Goltsov A, Bown J, Langdon SP, Harrison DJ. Abstract P6-07-02: A Systems Analysis of Oscillations in the MAPK Pathway Reveals New Mechanisms of Feed-Forward and Feedback Signaling Control. Cancer Res 2010. [DOI: 10.1158/0008-5472.sabcs10-p6-07-02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Oscillations occur in diverse areas of cellular biology, from mechanotransduction to circadian control. Their physiological, pathological, and therapeutic significance in breast cancer remains undetermined, and their existence has yet to be described in the key oncogenic signaling pathways. Mathematical modeling lends itself to detailed study of these complex dynamic phenomena. We observed damped oscillations in pERK with approximately 20 minute periodicity in MCF7 breast carcinoma cell lines after stimulation with heregulin or epidermal growth factor (EGF). In order to establish mechanisms by which these oscillations might occur, we used an ordinary differential equation-based mathematical model of MAPK/PI3K signaling to simulate oscillatory behaviour in MAPK signaling. Both modification of feed-forward (HER2 overexpression) and feedback (abrogation of early gene transcription, EGFR phosphorylation by pERK, crosstalk between pAKT and RAF, and binding of pERK with SOS) loops resulted in the emergence of sustained oscillations in phospho-ERK. When these simulations were tested experimentally, MCF7 cells stably transfected with HER2 (MCF7/HER2-18) showed sustained oscillations in pERK when stimulated with heregulin, which were abrogated by inhibition of HER2 heterodimerisation with pertuzumab. Likewise, suppression of transcriptional feedback with cycloheximide resulted in sustained oscillations in pERK of increased amplitude. We have therefore described oscillations in MAPK signalling for the first time in breast cancer cell lines. Since the duration and amplitude of these oscillations is altered both by addition of the HER2 oncogene, and by inhibition of feedback control, the functional consequences of changes in oscillations may have fundamental consequences both in oncogenesis and therapeutic efficacy.
Citation Information: Cancer Res 2010;70(24 Suppl):Abstract nr P6-07-02.
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Huang Y, Lu G, Quan J, Sun H, Li H, Hu H, Guo J. Primary perivascular epithelioid cell tumor of the bladder. Ann Diagn Pathol 2010; 15:427-30. [PMID: 21036638 DOI: 10.1016/j.anndiagpath.2010.07.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2010] [Revised: 07/12/2010] [Accepted: 07/14/2010] [Indexed: 11/28/2022]
Abstract
The perivascular epithelioid cell family of tumors includes angiomyolipoma, clear cell "sugar" tumor of the lung, lymphangioleiomyomatosis, and clear cell myomelanocytic tumor of the falciform ligament/ligamentum teres. Less frequently, perivascular epithelioid cell tumors arise in various other locations throughout the body including soft tissue, bone, and visceral organs. We report a case of a 23-year-old man who presented with 2-month history of frequent micturition and odynuria. Based on clinical examination, ultrasound computed tomography imaging, surgical operation, and histopathologic studies, a definitive diagnosis was made. Further characteristic images and pathology of this disease are discussed.
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Pan CH, Shih TS, Chen CJ, Hsu JH, Wang SC, Huang CP, Kuo CT, Wu KY, Hu H, Chan CC. Reduction of cooking oil fume exposure following an engineering intervention in Chinese restaurants. Occup Environ Med 2010; 68:10-5. [DOI: 10.1136/oem.2009.049767] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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443
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Kuhnle ED, Hu H, Liu XJ, Dyke P, Mark M, Drummond PD, Hannaford P, Vale CJ. Universal behavior of pair correlations in a strongly interacting Fermi gas. PHYSICAL REVIEW LETTERS 2010; 105:070402. [PMID: 20868022 DOI: 10.1103/physrevlett.105.070402] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2010] [Revised: 06/21/2010] [Indexed: 05/29/2023]
Abstract
We show that short-range pair correlations in a strongly interacting Fermi gas follow a simple universal law described by Tan's relations. This is achieved through measurements of the static structure factor which displays a universal scaling proportional to the ratio of Tan's contact to the momentum C/q. Bragg spectroscopy of ultracold 6Li atoms from a periodic optical potential is used to measure the structure factor for a wide range of momenta and interaction strengths, providing broad confirmation of this universal law. We calibrate our Bragg spectra using the f-sum rule, which is found to improve the accuracy of the structure factor measurement.
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Zhang HG, Hu H, Pan Y, Mao JH, Gao M, Guo HM, Du SX, Greber T, Gao HJ. Graphene based quantum dots. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2010; 22:302001. [PMID: 21399330 DOI: 10.1088/0953-8984/22/30/302001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Laterally localized electronic states are identified on a single layer of graphene on ruthenium by low temperature scanning tunneling spectroscopy (STS). The individual states are separated by 3 nm and comprise regions of about 90 carbon atoms. This constitutes a highly regular quantum dot-array with molecular precision. It is evidenced by quantum well resonances (QWRs) with energies that relate to the corrugation of the graphene layer. The dI/dV conductance spectra are modeled by a layer height dependent potential-well with a delta-function potential that describes the barrier for electron penetration into graphene. The resulting QWRs are strongest and lowest in energy on the isolated 'hill' regions with a diameter of 2 nm, where the graphene is decoupled from the surface.
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Vo TD, Hu H, Galili M, Palushani E, Xu J, Oxenløwe LK, Madden SJ, Choi DY, Bulla DAP, Pelusi MD, Schröder J, Luther-Davies B, Eggleton BJ. Photonic chip based transmitter optimization and receiver demultiplexing of a 1.28 Tbit/s OTDM signal. OPTICS EXPRESS 2010; 18:17252-17261. [PMID: 20721113 DOI: 10.1364/oe.18.017252] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We demonstrate chip-based Tbaud optical signal processing for all-optical performance monitoring, switching and demultiplexing based on the instantaneous Kerr nonlinearity in a dispersion-engineered As(2)S(3) planar waveguide. At the Tbaud transmitter, we use a THz bandwidth radio-frequency spectrum analyzer to perform all-optical performance monitoring and to optimize the optical time division multiplexing stages as well as mitigate impairments, for example, dispersion. At the Tbaud receiver, we demonstrate error-free demultiplexing of a 1.28 Tbit/s single wavelength, return-to-zero signal to 10 Gbit/s via four-wave mixing with negligible system penalty (< 0.5 dB). Excellent performance, including high four-wave mixing conversion efficiency and no indication of an error-floor, was achieved. Our results establish the feasibility of Tbaud signal processing using compact nonlinear planar waveguides for Tbit/s Ethernet applications.
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Hu H, Su L, Xu Y, Zhang H, Wang L. Behavioral and [F-18] fluorodeoxyglucose micro positron emission tomography imaging study in a rat chronic mild stress model of depression. Neuroscience 2010; 169:171-81. [DOI: 10.1016/j.neuroscience.2010.04.057] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2010] [Revised: 04/23/2010] [Accepted: 04/24/2010] [Indexed: 10/19/2022]
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Wang QJ, Cai XB, Liu MH, Hu H, Tan XJ, Jing XB. Apoptosis induced by emodin is associated with alterations of intracellular acidification and reactive oxygen species in EC-109 cells. Biochem Cell Biol 2010; 88:767-74. [PMID: 20651850 DOI: 10.1139/o10-020] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Emodin (1,3,8-trihydroxy-6-methylanthraquinone), a natural anthraquinone derivative found in several herbal medicines, is highly active in suppressing the proliferation of various tumor cells such as breast, hepatocellular, and lung cancer cells under in vitro conditions. The mechanism of emodin-induced apoptosis in esophagus carcinoma cells, EC-109, is not completely understood. In this study, EC-109 cells treated with emodin underwent rapid apoptosis as judged by morphological changes and flow cytometry analysis. The addition of emodin to EC-109 cells led to the inhibition of growth in a time- and dose-dependent manner. Fluorescence measurements of cells indicated that the intracellular pH (pHi) decreased significantly by 0.47-0.78 units. The results obtained from flow cytometry suggested that bursts of reactive oxygen species took place after the application of emodin. The present study indicates that emodin may be a strong anticancer drug against esophagus cancer cells by causing various early events leading to growth inhibition, including the production of reactive oxygen species and decrease of pHi, which may result in cellular apoptosis.
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Hu H, Liang W, Liu M, Li L, Li Z, Li T, Wang J, Shi T, Han S, Su M, Peng X, Peng Y, Zhao W, Wang B, Zhang P, Zhu W. Establishment and evaluation of a model of a community health service in an underdeveloped area of China. Public Health 2010; 124:206-17. [PMID: 20417351 DOI: 10.1016/j.puhe.2010.01.015] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2009] [Revised: 10/26/2009] [Accepted: 01/27/2010] [Indexed: 11/17/2022]
Abstract
OBJECTIVES To develop and evaluate an applicable model for a community health service (CHS) in an underdeveloped area of China that ensures efficient, convenient and affordable primary healthcare access for all residents. STUDY DESIGN The current study was carried out in Puyang, a typical medium-sized city in central-eastern China. Based on the healthcare requirements of the residents in Puyang, a CHS network was set up and its operation was evaluated from 1999 to 2006. The system is characterized by its focus on community health education (CHE). METHODS Firstly, 8231 residents, selected at random, were surveyed to investigate the healthcare requirements of the local residents. Meanwhile, the operation of the pre-existing healthcare resources was investigated in Puyang. Based on the information gained, a network-based CHS system was proposed and established, with CHE as the major focus. This study compared CHS operation prior to and after establishment of the network. Finally, an analytic hierarchy process based evaluation model was applied to evaluate the operation of the CHS network. RESULTS There was a high prevalence (86.98 per thousand) of chronic diseases among the residents who participated in this investigation. The majority (84.39%) of the residents who had healthcare requirements resorted to professional health care; the other residents did not have access to health services. Among those residents who sought professional treatment, 71.3% visited primary healthcare institutions. This information reflects the enormous requirement for a CHS in primary health care but the lack of accessibility among the residents; this motivated the authors to establish a system to solve the problem. The improvement in CHS operation after the network was established suggests the importance of a network for optimizing the primary healthcare system. The improvement was indicated by better understanding of the residents regarding the CHS, and enhanced capability of self-monitoring for chronic diseases such as hypertension after the network was established. Moreover, the residents' knowledge of health care was significantly increased and, accordingly, the incidence of health risk behaviour was reduced after the network was established. Furthermore, the CHE index between 1999 and 2006 showed good correlation (r=0.988, p<0.005) with the CHS index, suggesting the important role of CHE in CHS development. CONCLUSIONS A network-characterized CHS system was established in Puyang, and improved the primary healthcare situation. This study provides a feasible model for the development of a CHS in medium and small cities in underdeveloped parts of China.
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Tunceli K, Sajjan S, Ramey D, Neff D, Tershakovec A, Hu H, Foody J. MS45 IMPACT OF SWITCHING TO SIMVASTATIN ON LOW DENSITY LIPOPROTEIN CHOLESTEROL GOAL ATTAINMENT. ATHEROSCLEROSIS SUPP 2010. [DOI: 10.1016/s1567-5688(10)70546-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Huang ZS, Zeng CL, Zhu LJ, Jiang L, Li N, Hu H. Salvianolic acid A inhibits platelet activation and arterial thrombosis via inhibition of phosphoinositide 3-kinase. J Thromb Haemost 2010; 8:1383-93. [PMID: 20345719 DOI: 10.1111/j.1538-7836.2010.03859.x] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND AND OBJECTIVE Salvianolic acid A (SAA) is a water-soluble component from the root of Salvia miltiorrhiza Bunge, a herb that is widely used for atherothrombotic disease treatment in Asian medicine. As platelets play pivotal roles in atherothrombogenesis, we studied the effect of SAA on platelet activation and its underlying mechanisms. METHODS AND RESULTS SAA dose-dependently inhibited platelet aggregation induced by ADP, thrombin, collagen and U46619. It reduced ADP-enhanced platelet P-selectin expression and fibrinogen binding, which consequently hampered ADP-induced platelet-leukocyte aggregation. SAA also inhibited platelet spreading on fibrinogen, a process mediated by outside-in signaling. Under an arterial shear rate of 1000 s(-1), SAA decreased platelet adhesion on collagen surfaces by approximately 40%. Western blot analysis showed that SAA, like the phosphoinositide 3-kinase (PI3K) inhibitors LY294002 and TGX-221, potently inhibited PI3K, as shown by reduced Akt phosphorylation. The in vitro findings were further evaluated in the mouse model of arterial thrombosis, in which SAA prolonged the mesenteric arterial occlusion time in wild-type mice (35 + or - 2 min without SAA and 56 + or - 4 min with SAA; P < 0.01). Interestingly, SAA could even counteract the shortened arterial occlusion time in Ldlr(tm1Her) mutant mice (21 + or - 2 min without SAA and 45 + or - 4 min with SAA; P < 0.01). CONCLUSIONS SAA inhibits platelet activation via the inhibition of PI3K, and attenuates arterial thrombus formation in vivo. Our data suggest that SAA may be developed as a novel therapeutic agent for the prevention of thrombotic disorders.
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