Li Wang

Wake Forest University, Winston-Salem, North Carolina, United States

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Publications (35)84.32 Total impact

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    ABSTRACT: Knowledge is limited about the relationship between chemotherapy and prognosis among the subtypes of axillary node-negative breast cancer (ANNBC). In this study, a population including 2,236 primary and operable ANNBC patients, with a median age of 53, were included. All breast tumors were classified into five immunohistochemically defined subtypes-luminal A, luminal B, luminal human epidermal growth factor receptor 2 (HER2), HER2 overexpression, and triple negative. With a median follow-up of 73.6 months, the rate of relapse was lowest in luminal A (6.5 %) and highest in HER2 overexpression subtype (16.4 %). Multivariate analysis indicated that the risks of relapse and death were enhanced in HER2 overexpression and triple-negative (TN) subtypes, and these two subtypes were independent predictors of relapse and death. Luminal A patients with risk factors could benefit from chemotherapy in terms of relapse-free survival (RFS). The relapse rate of TN patients after chemotherapy with taxanes was lower compared with that after chemotherapy without taxanes. In conclusion, women with ANNBC were at higher risks of relapse and death if suffering from HER2 overexpression or TN diseases. Chemotherapy could reduce the recurrence rate of luminal A patients with risk factors. TN patients may benefit from adjuvant chemotherapy containing taxanes.
    Tumour biology : the journal of the International Society for Oncodevelopmental Biology and Medicine. 05/2014;
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    ABSTRACT: Abstract Objective: To first describe laparoscopic nephrectomy (LN) for patients with acute blunt Grade 4 renal injuries using a retroperitoneal approach. Patients and Methods: Three patients (2 males and 1 female) with acute blunt renal trauma underwent retroperitoneal LN successfully. The revised American Association for Surgery of Trauma grading system was used to grade renal injuries. All three patients with Grade 4 renal injuries required blood transfusions preoperatively and angiographic embolization because of hemodynamic instability. Given the severity of the renal injuries, failure of angiographic embolization, and persistent blood loss, surgical intervention was used. We performed retroperitoneal LN using four trocars within 24 hours after trauma for the patients. Results: Pure retroperitoneal LN was successfully performed in all 3 patients without requiring hand-assisted or open surgery. The renal hematoma dimension for the patients was 7.5, 8.4, and 9.2 cm, respectively. Operative time was 80, 110, and 130 minutes, respectively. Estimated blood loss was 100, 140, and 300 mL, respectively. The incision size was 4.2, 4.2, and 4.5 cm, respectively. The average hospital stay was 6 days. Pathology showed renal injuries without incidental renal tumors. Conclusions: Despite the technical challenges, LN for patients with acute blunt Grade 4 renal injuries using a retroperitoneal approach is safe and feasible in carefully selected patients if conservative measures and angiographic embolization fail. However, it is important to note that one should keep a low threshold for open conversion or the hand-assisted approach whenever necessary.
    Journal of Laparoendoscopic & Advanced Surgical Techniques 05/2014; · 1.07 Impact Factor
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    ABSTRACT: Recent genome-wide association studies have identified 14 genetic variants associated with bladder cancer in Caucasians. The effects of these risk variants and their cumulative effects in Asian populations are unknown. We genotyped these newly identified variants in a case-control study of 1,050 patients diagnosed with bladder cancer and 1,404 controls in the Chinese population. Odds rations (ORs) and 95% confidence intervals (CIs) were computed by logistic regression, and cumulative effect of risk alleles were evaluated. Overall, seven of the 14 variants were significantly associated with bladder cancer risk (P = 9.763 × 10-3 for rs9642880 at 8q24.21, P = 3.004 × 10-3 for rs2294008 at 8q24.3, P = 0.012 for rs798766 at 4p16.3, P = 0.034 for rs1495741 at 8p22, P = 2.306 × 10-4 for GSTM1, P = 8.507 × 10-8 for rs17674580 at 18q12.3, P = 7.179 × 10-4 for rs10936599 at 3q26.2), and the Odds Ratios (ORs) ranged from 1.13 to 1.65. Moreover, there were a significant increased risk for bladder cancer positively correlated numbers of risk alleles and smoking status (Ptrend = 7.060 × 10-16). However, no allelic interaction effects on bladder cancer risk were observed between cumulative effects of variants and clinical characteristics. These findings suggest that seven bladder cancer risk-associated variants (rs9642880, rs2294008, rs798766, rs1495741, GSTM1 null, rs17674580, and rs10936599) may be used, collectively, to effectively measure inherited risk for bladder cancer. © 2014 Wiley Periodicals, Inc.
    International Journal of Cancer 04/2014; · 6.20 Impact Factor
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    ABSTRACT: OBJECTIVES To describe our pure retroperitoneal laparoscopic radical nephrectomy (LRN) with thrombectomy for right renal masses with renal vein (RV) and inferior vena cava (IVC) thrombus. METHODS Five right renal masses with RV and IVC thrombus underwent pure retroperitoneal LRN. Three patients had a history of abdominal surgery. In one patient with a RV thrombus, the RV was ligated and dissected with Hem-o-lok clips; in 4 patients with IVC thrombus, the IVC was partially occluded with a laparoscopic vascular clamp and incised distal to its junction with the right RV, and the thrombus was delivered intact. The IVC was closed with a running 3-zero polypropylene suture. RESULTS Pure retroperitoneal LRN with thrombectomy was successfully performed for all the patients without hand-assisted or open conversion. The mean tumor size was 6.2cm and mean thrombus length was 2.8cm; Four thrombus extended 0.6-1.0cm into the IVC and the mean operative time was 127 minutes with the average estimated blood loss at 148 ml. The mean hospital stay was 5 days. Histology revealed 2 renal cell carcinomas (RCC), 1 angiomylipoma (AML), 1 renal pelvic transitional cell carcinoma (TCC) and 1 renal infarction. All the surgical margins were negative. With a mean follow-up of 35 months, no patients developed metastatic diseases. CONCLUSIONS Despite the technical challenges, pure retroperitoneal LRN for right renal masses with a RV and IVC thrombus is safe and feasible in appropriately selected patients using a retroperitoneal approach. In patients with minimal caval involvement, our surgical approach provided an alternative treatment option, especially when the patients had a history of abdominal surgery.
    Journal of endourology / Endourological Society 03/2014; · 1.75 Impact Factor
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    ABSTRACT: A sensitive and selective electrochemical method was developed for the detection of DNA methylation, determination of DNA methyltransferase (MTase) activity and screening of MTase inhibitor. Methylene blue (MB) was employed as electrochemical indicator and DNA-modified gold nanoparticles (AuNPs) were used as signal amplification unit because the DNA strands in this composite have strong adsorption ability for MB. First, the thiolated single-stranded DNA S1 was self-assembled on gold electrode, hybridization between the lower portion of DNA S1 and its complementary DNA S2 formed an identical double-stranded tetranucleotide target sequence for both DNA adenine methylation (Dam) MTase and methylation-resistant endonuclease Mbo I, then the upper portion of DNA S1 was hybridized with its complementary DNA S3 modified on AuNPs to bring the DNA S3-AuNPs amplification units onto the electrode. The DNA S1/S2/S3-AuNPs bioconjugate has lots of DNA strands, and they can adsorb abundant MB. Mbo I endounuclease could not cleave the identical target sequence after it was methylated by Dam MTase. On the contrary, the sequence without methylation could be cleaved, which would decrease the amount of adsorbed MB. The presence of redox-active MB was detected electrochemically by differential pulse voltammetry (DPV). Thus, the activity of Dam MTase and methylation status were sensitively converted to the DNA S3-AuNPs amplified DPV signals. The DPV signal demonstrated a linear relationship with logarithm of Dam concentration ranging from 0.075 to 30U/mL, achieving a detection limit of 0.02U/mL (S/N=3). Also, screening of Dam MTase inhibitor 5-fluorouracil was successfully investigated using this fabricated sensor.
    Biosensors & bioelectronics 02/2014; 58C:40-47. · 5.43 Impact Factor
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    ABSTRACT: The role of [-2]proPSA (p2PSA) based diagnostic tests for the detection of aggressive prostate cancer (PCa) has not been fully evaluated. We conducted a meta-analysis to evaluate the diagnostic performance of p2PSA/free PSA (%p2PSA) and prostate health index (Phi) tests for PCa and to evaluate their ability in discriminating between aggressive and non-aggressive PCa. A total of 16 articles were included in this meta-analysis. For the detection of PCa, the pooled sensitivity, specificity, and AUC were 0.86 (95% CI, 0.84-0.87), 0.40 (95% CI, 0.39-042) and 0.72 (95% CI, 0.67-0.77) for %p2PSA respectively, and were 0.85 (95% CI, 0.83-0.86), 0.45 (95% CI, 0.44-0.47) and 0.70 (95% CI = 0.65-0.74) for Phi, respectively. In addition, the sensitivity for discriminating PCa between higher Gleason score (≥7) and lower Gleason score (<7) was 0.96 (95% CI, 0.93-0.98) and 0.90 (95% CI, 0.87-0.92) for %p2PSA and Phi respectively, and the specificity was low, only 0.09 (95% CI, 0.06-0.12) and 0.17 (95% CI, 0.14-0.19) for %p2PSA and Phi, respectively. Phi and %p2PSA have a high diagnostic accuracy rates and can be used in PCa diagnosis. Phi and %p2PSA may be useful as tumor markers in predicating patients harboring more aggressive disease and guiding biopsy decisions.
    Scientific reports. 01/2014; 4:5012.
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    ABSTRACT: A novel electrochemical aptasensor was developed for ultrasensitive detecting staphylococcal enterotoxin B (SEB) by combining signal amplification and target-induced aptamer release strategy. Target SEB could efficiently induce the release of aptamers from the eletrode surface, thus leading to substantial enzyme-amplified electrochemical signal in the presence of H2O2.
    Colloids and surfaces B: Biointerfaces 01/2014; · 3.55 Impact Factor
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    ABSTRACT: An ultrasensitive and specific electrochemical biosensor for the determination of mecA gene, which is associated with methicillin resistant strains, was successfully developed. Capture probes were immobilized on the surface of a gold nanoparticle modified glassy carbon electrode. After target probes were hybridized with capture probes, dual labeled gold nanoparticles with alkaline phosphatase and detection probes were hybridized with target probes for sensitive detection of mecA gene fragments. Dual labeled gold nanoparticles, which acted as a high-efficiency signal amplification strategy, were successfully prepared. The gold nanoparticles and dual labeled gold nanoparticles were characterized by transmission electron microscopy. Different concentrations of gene fragments were detected to inspect the specificity and sensitivity of the proposed biosensor. This biosensor displayed outstanding selectivity and a remarkable sensitivity (LOD = 23 pM, S/N = 3). Good linearity over the range of 50 pM to 250 pM was demonstrated. Moreover, the measurement process required less than 2 hours. This device was employed for the successful determination of mecA gene from methicillin resistant Staphylococcus aureus.
    Analytical Letters 01/2014; 47(4). · 0.97 Impact Factor
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    ABSTRACT: To establish a series of objective parameters to predict the risk of relapse from axillary lymph node-negative (ANN) breast cancer, and evaluate the patterns of recurrence according to molecular subtypes, we collected information on 2126 consecutive breast cancer patients operated between 2002 and 2006. In this case-control study, 212 patients experiencing recurrence or breast cancer related death were defined as 'poor group'. Another 212 patients were selected from the remaining cases with stratified sampling method to comprise the 'good group'. Significant differences were found in vascular invasion, grade and molecular subtype between the two groups. Expression of ER and PR in the 'poor group' was lower (P < 0.05). However, positive rates of Ki67, p53 and VEGF in the 'poor group' were higher (P < 0.05). Multivariate analysis revealed that molecular subtype, expression of VEGF, tumor grade, and vascular invasion were closely correlated with bad outcome. Analysis of the 'poor group' demonstrated that 'HER2 positive' and 'triple negative' subtypes more commonly suffered from distant metastases and death. No metastasis was found in patients with pure invasive papillary carcinoma, invasive cribriform carcinoma or adenoid cystic carcinoma, whereas the diagnoses of invasive micropapillary carcinoma, invasive apocrine carcinoma, invasive papillary carcinoma mixed with invasive ductal carcinoma, or metaplastic carcinoma were correlated with distant metastasis and death. In conclusion, molecular subtype and expression of VEGF are useful markers for predicting prognosis of ANN breast cancer patients. 'Luminal A-like' subtype has better outcome than others. Moreover, molecular subtypes have different recurrence patterns.
    International journal of clinical and experimental pathology. 01/2014; 7(6):3202-12.
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    ABSTRACT: An ultrasensitive and selective electrochemical immunosensor was developed for the detection of Epstein Barr virus nuclear antigen 1 (EBNA-1). Firstly, a suspension of graphene sheets (GS) and multi-walled carbon nanotubes (MWCNTs) was prepared with the aid of chitosan (CS) solution and then modified on a glassy carbon electrode (GCE). Gold nanoparticles (AuNPs) were then electrodeposited onto the surface of the GS–MWCNTs film by cyclic voltammetry (CV) to immobilize the captured antibodies. After that, specific sandwich immunoreactions were formed among the captured antibody, EBNA-1, and secondary antibody, DNA-coated carboxyl multi-wall carbon nanotubes (DNA–MWCNTs–Ab2). DNA initiator strands (S0) and secondary antibodies linked to the MWCNTs and double-helix DNA polymers were obtained by hybridization chain reaction (HCR), and here S0 on the MWCNTs propagates a chain reaction of hybridization events between two alternating hairpins to form a nicked double-helix. Finally, electroactive indicator doxorubicin hydrochloride was intercalated into the CG–GC steps between the HCR products and could produce an electrochemical signal, which was monitored by differential pulse voltammetry (DPV). Under optimum conditions, the amperometric signal increased linearly with the target concentrations (0.05–6.4 ng mL−1), and the immunosensor exhibited a detection limit as low as 0.7 pg mL−1 (S/N=3). The proposed method showed acceptable stability and reproducibility, as well as favorable recovery for EBNA-1 in human serum. The proposed immunosensor provides a novel avenue for signal amplification and potential applications in bioanalysis and clinical diagnostics.
    Biosensors & bioelectronics 01/2014; 58:68–74. · 5.43 Impact Factor
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    ABSTRACT: Labeling children's play behavior is an important process in children's social behavior analysis which is traditionally done by experienced coders. With the growing volume of data, automatic methods for labeling are increasingly required. This paper presents a novel method to label children's social behavior automatically in peer-play scenarios based on visual attention and mutual interaction computation. In this method, the discrete distribution of children's visual attention is computed based on face pose estimation. Then, the mutual interaction among children is calculated by "Attention Processes", which are continuous periods of time during which a certain child pays attention to the same target. After that, "Solitary Feature" and "Group Feature" are extracted by the mutual interaction of children and children's play behaviors will be classified into 3 types ("Solitary Play", "Parallel Play" and "Group Play") by these two kinds of features. Finally, this method is evaluated by a dataset of children's peer-play scenarios and the results show this method has a good performance in our dataset.
    Proceedings of the 2013 IEEE International Conference on Computer Vision Workshops; 12/2013
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    ABSTRACT: Background: This work aims to explore the role of Th17 and IL-17 signaling in the pathogenesis of primary nephrotic syndrome (PNS) in children and podocyte injury, children with PNS were divided into minimal change nephrotic syndrome (MCNS) and non-minimal change nephrotic syndrome [NMCNS, including mesangial proliferative glomerulonephritis (MsPGN) and focal segmental glomerulosclerosis (FSGS)]. Methods: Flow cytometry (FCM) was used to observe the circulating frequency of Th17 cells and the apoptosis of podocytes by annexinV-FITC/PI. Serum IL-1β and IL-6 levels were measured using enzyme-linked immunosorbent assay. The Fas and FasL expressions in podocytes were examined by FCM analysis using a direct immunofluorescence method. Reverse transcription polymerase chain reaction was applied to measure the mRNA expressions of RORc, IL-23p19, Nephrin, WT1, Synaptopodin, Podocalyxin, Fas, and FasL. The IL-17 and IL-1β expression in renal biopsy tissue was detected by immunohistochemistry. The expressions of WT1, Caspase 8, and Caspase 3 in podocyte cell culture were also measured using immunocytochemistry. Results: Circulating frequencies of Th17 cells, mRNA levels of RORc and IL-23p19, and serum levels of IL-6 and IL-1β were higher in the MCNS and NMCNS groups than in the control group (all P < 0.05), and were higher in the NMCNS group than in the MCNS group (all P < 0.05). The expressions of IL-17 and IL-1β in renal biopsy tissue were higher in the MCNS, MsPGN, and FSGS groups than in the control group (all P < 0.05). Recombinant murine IL-17 (rmIL-17) had no effect on the expressions of Nephrin, Synaptopodin, and WT1 of mouse podocytes, but caused an decrease in the expression of podocalyxin as well as promoted apoptosis in a dose- and time-dependent fashion. Moreover, rmIL-17 increased the expression of Fas, Casepase-8, and Casepase-3, but had no effect on that of FasL. Conclusion : Th17/IL-17 may contribute to the pathogenesis of PNS by decreasing the podocalyxin level and inducing podocyte apoptosis. © 2013 S. Karger AG, Basel.
    Kidney and Blood Pressure Research 09/2013; 37(4-5):332-345. · 1.60 Impact Factor
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    ABSTRACT: A sensitive and selective electrochemical DNA sensor was developed for the detection of BCR/ABL fusion gene in chronic myelogenous leukemia (CML). Firstly, graphene sheets (GS) suspension was prepared with the aid of chitosan (CS) solution and then fabricated onto the glassy carbon electrode (GCE), followed by the electro-polymerization of aniline to form the PANI layer, then, Au nanoparticles (AuNPs) were electro-deposited onto the modified GCE to immobilize the capture probes. The capture probe employed a hairpin structure and dually labeled with a 5'-SH and a 3'-biotin. After hybridization with the target DNA, hairpin structure was compelled to open and 3'-biotin was forced to stay away from the electrode surface. As a result, streptavidin-alkaline phosphatase (SA-AP) was covalently binded to the capture probe via biotin-avidin system. Reduction currents were then generated after catalyzing the hydrolysis of the electroinactive 1-naphthyl phosphate (1-NP) to 1-naphthol and monitored by differential pulse voltammetry (DPV). Under optimum conditions, the amperometric signals increased linearly with the target DNA concentrations (10pM to 1000pM), and the DNA sensor exhibited a detection limit as low as 2.11pM (S/N=3) with an excellent differentiation ability, and the proposed method showed acceptable stability and reproducibility. It has been applied for assay of BCR/ABL fusion gene from real samples with satisfactory results.
    Biosensors & bioelectronics 08/2013; 51C:201-207. · 5.43 Impact Factor
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    ABSTRACT: An efficient DNA electrochemical biosensor, based on the gold nanoparticles (GNPs) in situ synthesized at the surface of multiwalled carbon nanotubes (MWCNTs), cerium dioxide (CeO2) and chitosan (Chits) composite membrane, was developed for the detection of BCR/ABL fusion gene in chronic myelogenous leukemia (CML). The capture probe was attached onto the nanocomposite membrane modified glassy carbon electrode (GCE) through the conjugated structure. Owing to the synergistic effects of CeO2 nanoparticles with a strong adsorption ability and MWCNTs with a large surface area and excellent electron transfer ability, the prepared composite membrane was demonstrated an efficient electron transfer ability. The biosensor was electrochemically characterized by cyclic voltammogram (CV) and differential pulse voltammetry (DPV), and the decrease of the peak currents upon hybridization was observed using methylene blue (MB) as the electroactive indicator. Under the optimized conditions, peak currents were linear over the range from 1 × 10(-9) M to 1 × 10(-)(12) M, with a detection limit of 5 × 10(-)(13) M (based on the 3σ). And the proposed method was successfully applied for the detection of PCR real samples with satisfactory results. Furthermore, the developed DNA biosensor was demonstrated a good selectivity, a reasonable stability and a favorable reproducibility, which could be regenerated easily.
    Colloids and surfaces B: Biointerfaces 07/2013; 112C:344-349. · 3.55 Impact Factor
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    ABSTRACT: A novel strategy to simplify the dehydrogenase-based electrochemical biosensor fabrication through one-step drop-coating nanobiocomposite on a screen printed electrode (SPE) was developed. The nanobiocomposite was prepared by successively adding graphitized mesoporous carbons (GMCs), meldola's blue (MDB), alcohol dehydrogenase (ADH) and cofactor nicotinamide adenine dinucleotide (NAD(+)) in chitosan (CS) solution. MDB/GMCs/CS film was prepared. Cyclic voltammetry measurements demonstrated that MDB was strongly adsorbed on GMCs. After optimizing the concentration of MDB and the working potential, the MDB/GMCs/CS film presented a fast amperometric response (5s), excellent sensitivity (10.36nAμM(-1)), wide linear range (10-410μM) toward NADH and without any other interference signals (such as AA, UA, DA, H2O2 and metal ions). Furthermore, concentrations of ADH and NAD(+) in nanobiocomposite and the detection conditions (temperature and pH) were also optimized. The constructed disposable ethanol biosensor showed an excellent linear response ranged from 0.5 to 15mM with high sensitivity (67.28nAmM(-1)) and a low limit of detection (80μM) and a remarkable long-term stability (40 days). The intra-batch and inter-batch variation coefficients were both less than 5% (n=5). The ethanol recovery test demonstrated that the proposed biosensor offered a remarkable and accurate method for ethanol detection in the real blood samples.
    Talanta 07/2013; 111C:163-9. · 3.50 Impact Factor
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    ABSTRACT: Carcinoma showing thymus-like differentiation (CASTLE) is a rare intrathyroidal neoplasm, probably arising from ectopic thymus or branchial pouch remnants. The tumor was first reported by Miyauchi et al. [1].The clinical and pathological features of this tumor were classified by Chan et al. [2] into 4 groups: ectopic hamartomatous thymoma, ectopic cervical thymoma, spindle ephithelial tumor with thymic-like differentiation (SETTLE), and carcinoma showing thymus-like differentiation (CASTLE). Recently, CASTLE has been designated as an independent clinicopathologic entity of thyroid tumors in the most recent edition of the World Health Organization classification of tumors of endocrine organs[3].To our knowledge, less than 100 cases of CASTLE have been reported in the literature, 45 cases of which (including one of the authors' patient) have been identified in China. We report a new case of this entity and suggest recommendations for diagnosis.
    Pathology - Research and Practice 07/2013; · 1.21 Impact Factor
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    ABSTRACT: A recent Genome-Wide Association study (GWAS) identified rs11984041 on HDAC9 gene to be significantly associated with stroke in a Caucasian population. However, whether HDAC9 gene also plays a role in other ethnicities is unknown. The current study was conducted to investigate the association of single nucleotide polymorphisms (SNPs) on HDAC9 gene and stroke risk in a Chinese population. Sixteen tagging SNPs for HDAC9 gene were genotyped in a Chinese population of 279 stroke cases and 984 controls from Changhai Hospital in Shanghai, China. The candidate region of HDAC9 investigated was on a haplotype block located between two recombination hotspots in the tail region of HDAC9, the only region harbouring significantly associated SNPs based on the previous GWAS. rs11984041 was not polymorphic in Chinese population. Two other SNPs, rs2389995 and rs2240419 on HDAC9 of chromosome 7q21.1, were significantly associated with large-vessel stroke risk, with P values of 0.035 and 0.042, respectively (Table 3). Individuals with risk allele (A) for rs2389995 and (T) for rs2240419 had increased risk of stroke (odds ratio [OR] = 1.33, 95% confidence interval [CI]: 1.01-1.75; and OR = 1.29, 95% CI: 1.02-1.63), respectively. Multivariate analysis including both SNPs in the logistic regression model revealed independent association effects of each SNP, with a P = 0.013 and 0.010, respectively. The results from our studies indicate HDAC9 gene is significantly associated with large-vessel stroke risk in Chinese population. However, SNPs on HDAC9 gene display heterogeneity effects across different ethnic populations. Additional studies are needed to further evaluate our results.
    Experimental Biology and Medicine 07/2013; · 2.80 Impact Factor
  • Asian Journal of Andrology 07/2013; · 2.14 Impact Factor
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    ABSTRACT: BACKGROUND: Benign prostatic hyperplasia (BPH) is a common disease prevalent in elderly men. However, the genetic determinants of BPH remain unclear. Because BPH and prostate cancer (PCa) share some common pathological characteristics, we investigated whether susceptibility loci for PCa contributed to BPH risk and BPH aggressiveness in Chinese men. METHODS: Fourteen SNPs associated with PCa risk in a Chinese population were genotyped in 426 BPH cases (184 aggressive and 242 non-aggressive BPH cases) and 1,008 controls. The association between the SNPs and BPH risk/aggressiveness was estimated using logistic regression analysis. In addition, effects of the 14 SNPs on BPH related clinical traits, including International Prostate Symptom Score (IPSS), prostate volume, total PSA, and free PSA were evaluated using linear regression analysis. RESULTS: Two SNPs, rs12621278 in ITGA6 at 2q31 (OR = 0.82, P = 0.05) and rs339331 in RFX6 at 6q22 (OR = 1.22, P = 0.04) were significantly associated with BPH. In addition, rs12621278 (OR = 0.73, P = 0.05) and rs12653946, 13 kb upstream of IRX4 at 5p15 (OR = 1.40, 0.03), were significantly associated with aggressive BPH. Moreover, the risk allele of rs12621278 (G) and rs12653946 (T) for aggressive BPH were significantly associated with elevated IPSS after treatment (P = 0.01). CONCLUSIONS: This is the first systematic investigation on the contributions of PCa susceptibility loci to risk and aggressiveness of BPH. Our findings advance our understanding of the genetic basis of BPH, especially aggressive BPH. In addition, our results provide new insights into the genetic determinants shared between BPH and PCa. Prostate 9999:XX-XX. © 2013 Wiley Periodicals, Inc.
    The Prostate 04/2013; · 3.84 Impact Factor
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    ABSTRACT: An ultrasensitive and selective electrochemical immunosensor was developed for the detection of hepatitis C virus (HCV) core antigen. The immunosensor consists of graphitized mesoporous carbon-methylene blue (GMCs-MB) nanocomposite as an electrode modified material and a horseradish peroxidase-DNA-coated carboxyl multi-wall carbon nanotubes (CMWNTs) as a secondary antibody layer. After modification of the electrode with GMCs-MB nanocomposite, Au nanoparticles were electrodeposited on to the electrode to immobilize the captured antibodies. The bridging probe and secondary antibodies linked to the CMWNTs, and DNA concatamers were obtained by hybridization of the biotin-tagged signal and auxiliary probes. Finally, streptavidin-horseradish peroxidases (HRP) were labeled on the secondary antibody layer via biotin-streptavidin system. The reduction current of MB were generated in the presence of hydrogen peroxide and monitored by square wave voltammetry. Under optimum conditions, the amperometric signal increased linearly with the core antigen concentration (0.25pgmL(-1) to 300pgmL(-1)). The immunosensor exhibites the detection limit as low as 0.01pgmL(-1) and it has a high selectivity. The new protocol showed acceptable stability and reproducibility, as well as favorable recovery for HCV core antigen in human serum. The proposed immunosensor has great potential for clinical applications.
    Biosensors & bioelectronics 04/2013; 47C:467-474. · 5.43 Impact Factor

Publication Stats

26 Citations
84.32 Total Impact Points

Institutions

  • 2014
    • Wake Forest University
      Winston-Salem, North Carolina, United States
    • Tianjin Medical University Cancer Institute and Hospital
      T’ien-ching-shih, Tianjin Shi, China
  • 2013–2014
    • Wake Forest School of Medicine
      • Center for Cancer Genomics
      Winston-Salem, North Carolina, United States
    • Chongqing Medical University
      Ch’ung-ch’ing-shih, Chongqing Shi, China
    • Changhai Hospital, Shanghai
      Shanghai, Shanghai Shi, China
  • 2011–2013
    • Sichuan University
      • State Key Laboratory of Oral Diseases
      Hua-yang, Sichuan, China