Yan Zhang

Xi'an Jiaotong University, Ch’ang-an, Shaanxi, China

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Publications (24)92.72 Total impact

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    ABSTRACT: The donkey, like the horse, is a promising model for exploring karyotypic instability. We report the de novo whole-genome assemblies of the donkey and the Asiatic wild ass. Our results reflect the distinct characteristics of donkeys, including more effective energy metabolism and better immunity than horses. The donkey shows a steady demographic trajectory. We detected abundant satellite sequences in some inactive centromere regions but not in neocentromere regions, while ribosomal RNAs frequently emerged in neocentromere regions but not in the obsolete centromere regions. Expanded miRNA families and five newly discovered miRNA target genes involved in meiosis may be associated with fast karyotype evolution. APC/C, controlling sister chromatid segregation, cytokinesis, and the establishment of the G1 cell cycle phase were identified by analysis of miRNA targets and rapidly evolving genes.
    Scientific Reports 09/2015; 5. DOI:10.1038/srep14106 · 5.58 Impact Factor
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    The Journal of Urology 04/2015; 193(4):e634. DOI:10.1016/j.juro.2015.02.1736 · 4.47 Impact Factor
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    ABSTRACT: To address difficulty in isolating the adhered periarterial vein in microsurgical subinguinal varicocelectomy, we introduced the transfixing microsuture method as well as to evaluate the impact of this technical modification on the surgical success of varicocele repair. We retrospectively evaluated 4 patients with a mean age of 31.5 years who underwent subinguinal varicocelectomy with transfixion of the difficult-to-isolate periarterial vein (a 9-0 transfixing microsuture was placed transversely through the periarterial vein as near to the adjacent border between the testicular artery and adherent vein as possible; then, it was knotted to nick or completely ligate the lumen.) The incidence of recurrence or persistence, postoperative hydrocele formation, sperm improvement, and symptom release was analyzed. In 4 cases, the periarterial vein transfixing procedures were performed with a mean follow-up of 6 months. No postoperative recurrence or hydrocele was identified postoperatively. One patient reported no symptom improvement, but there was significant improvement in the symptoms and/or semen parameters in the other 3 patients. Postoperative ultrasonography evaluation revealed that there was no postoperative varicocele recurrence or persistence, no hydrocele formation, and no testicular atrophy. When the adhered periarterial vein is difficult to isolate and ligate, transfixing the vein with a microsuture in microsurgical subinguinal varicocelectomy is a viable compromise that reduces the incidence of postoperative recurrence or persistence without serious complications. Copyright © 2015 Elsevier Inc. All rights reserved.
    Urology 02/2015; 85(4). DOI:10.1016/j.urology.2014.12.043 · 2.19 Impact Factor
  • Wen Zhai · Xu Li · Shouzhen Wu · Yan Zhang · Huan Pang · Wei Chen
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    ABSTRACT: Long non-coding RNAs (lncRNAs) have been recognized as a regulator of gene expression, and the deregulation of lncRNAs have been reported to be correlated with carcinogenesis and cancer progression. To explore the function of lncRNA in endometrial carcinoma, we analyzed the expression profiles of lncRNAs and coding genes in 3 paired endometrial carcinoma and adjacent non-tumor tissues, using a microarray. The results of microarray analysis indicated a significant difference in lncRNA and coding gene expression between endometrial carcinoma and their paired adjacent non-tumor tissues. A total of 53 lncRNAs (fold change >2.0, p-value <0.05) were found to be differently expressed in endometrial carcinoma compared to the normal controls. Among these ASLNC04080 was the most significantly upregulated lncRNA in microarray data, highly expressed in 22 out of 24 endometrial carcinoma tissues and HEC-1-B cell line. ASLNC04080 is 1867nt in length, consist of 6 exons, and locates at 1 p35.3(chr1: -28905061 - -28909492). In addition, 46 coding gene transcripts were differentially expressed (fold change >2.0, p-value <0.05) between endometrial carcinoma and adjacent non-tumor tissues. Pathway and gene ontology analysis demonstrated that these deregulated transcripts were involved in multiple signal pathways, biological processes, cellular components and molecular functions. Moreover, the ASLNC04080 lncRNA expression was correlated with 19 coding genes, and may contribute to endometrial carcinoma genesis and progression by co-regulating with coding gene. Expression inhibition of lncRNA ASLNC04080 in HEC-1-B cells caused repression of cell proliferation, increased cell apoptosis, and G1 phase arrest. These results suggested a potential function of ASLNC04080 in endometrial carcinoma genesis and progression.
    International Journal of Oncology 02/2015; 46(5). DOI:10.3892/ijo.2015.2897 · 3.03 Impact Factor
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    ABSTRACT: Single nucleotide polymorphisms (SNPs) are essential to the understanding of population genetic variation and diversity. Here, we performed restriction-site-associated DNA sequencing (RAD-seq) on 72 individuals from 13 Chinese indigenous and three introduced chicken breeds. A total of 620 million reads were obtained using an Illumina Hiseq2000 sequencer. An average of 75 587 SNPs were identified from each individual. Further filtering strictly validated 28 895 SNPs candidates for all populations. When compared with the NCBI dbSNP (chicken_9031), 15 404 SNPs were new discoveries. In this study, RAD-seq was performed for the first time on chickens, implicating the remarkable effectiveness and potential applications on genetic analysis and breeding technique for whole-genome selection in chicken and other agricultural animals.
    Animal Genetics 12/2014; 46(2). DOI:10.1111/age.12250 · 2.21 Impact Factor
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    Ting Liu · Le Zhao · Yan Zhang · Wei Chen · Dan Liu · Huilian Hou · Lu Ding · Xu Li
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    ABSTRACT: The prognosis of patients with ovarian cancer has remained poor mainly because of aggressive cancer progression. Since epithelial-mesenchymal transition (EMT) is an important mechanism mediating invasion and metastasis of cancer cells, targeting the EMT process with more efficacious and less toxic compounds to inhibit metastasis is of great therapeutic value for the treatment of ovarian cancer. We have found for the first time that the ginsenoside 20(S)-Rg3, a pharmacologically active component of the traditional Chinese herb Panax ginseng, potently blocks hypoxia-induced EMT of ovarian cancer cells in vitro and in vivo. Mechanistic studies confirm the mode of action of 20(S)-Rg3, which reduces the expression of hypoxia-inducible factor 1α (HIF-1α) by activating the ubiquitin-proteasome pathway to promote HIF-1α degradation. A decrease in HIF-1α in turn leads to up-regulation, via transcriptional suppression of Snail, of the epithelial cell-specific marker E-cadherin and down-regulation of the mesenchymal cell-specific marker vimentin under hypoxic conditions. Importantly, 20(S)-Rg3 effectively inhibits EMT in nude mouse xenograft models of ovarian cancer, promising a novel therapeutic agent for anticancer therapy.
    PLoS ONE 09/2014; 9(9):e103887. DOI:10.1371/journal.pone.0103887 · 3.23 Impact Factor
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    ABSTRACT: Karyotypic diversification is more prominent in Equus species than in other mammals. Here, using next generation sequencing technology, we generated and de novo assembled quality genomes sequences for a male wild horse (Przewalski's horse) and a male domestic horse (Mongolian horse), with about 93-fold and 91-fold coverage, respectively. Portion of Y chromosome from wild horse assemblies (3 M bp) and Mongolian horse (2 M bp) were also sequenced and de novo assembled. We confirmed a Robertsonian translocation event through the wild horse's chromosomes 23 and 24, which contained sequences that were highly homologous with those on the domestic horse's chromosome 5. The four main types of rearrangement, insertion of unknown origin, inserted duplication, inversion, and relocation, are not evenly distributed on all the chromosomes, and some chromosomes, such as the X chromosome, contain more rearrangements than others, and the number of inversions is far less than the number of insertions and relocations in the horse genome. Furthermore, we discovered the percentages of LINE_L1 and LTR_ERV1 are significantly increased in rearrangement regions. The analysis results of the two representative Equus species genomes improved our knowledge of Equus chromosome rearrangement and karyotype evolution.
    Scientific Reports 05/2014; 4:4958. DOI:10.1038/srep04958 · 5.58 Impact Factor
  • The Journal of Urology 04/2014; 191(4-4, Supplement):e745 -. DOI:10.1016/j.juro.2014.02.2060 · 4.47 Impact Factor
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    ABSTRACT: The abundance of gut microbiota can be viewed as a quantitative trait, which is affected by the genetics and environment of the host. To quantify the effects of host genetics, we calculated the heritability of abundance of specific microorganisms and genetic correlations among them in the gut microbiota of two lines of chickens maintained under the same husbandry and dietary regimes. The lines, which originated from a common founder population, had undergone >50 generations of selection for high (HW) or low (LW) 56-day body weight and now differ by more than 10-fold in body weight at selection age. We identified families of Paenibacillaceae, Streptococcaceae, Helicobacteraceae, and Burkholderiaceae that had moderate heritabilities. Although there were no obvious phenotypic correlations among gut microbiota, significant genetic correlations were observed. Moreover, the effects were modified by genetic selection for body weight, which altered the quantitative genetic background of the host. Heritabilities for Bacillaceae, Flavobacteriaceae, Helicobacteraceae, Comamonadaceae, Enterococcaceae, and Streptococcaceae were moderate in LW line and little to zero in the HW line. These results suggest that loci associated with these microbiota families, while exhibiting genetic variation in LW, have been fixed in HW line. Also, long term selection for body weight has altered the genetic correlations among gut microbiota. No microbiota families had significant heritabilities in both the LW and HW lines suggesting that the presence and/or absence of a particular microbiota family either has a strong growth promoting or inhibiting effect, but not both. These results demonstrate that the quantitative genetics of the host have considerable influence on the gut microbiota.
    PLoS ONE 03/2014; 9(3):e89862. DOI:10.1371/journal.pone.0089862 · 3.23 Impact Factor
  • Yue Teng · Le Zhao · Yan Zhang · Wei Chen · Xu Li
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    ABSTRACT: Background: Transforming growth factor beta 1 (TGFβ1) can induce epithelial-mesenchymal transition (EMT) in various human cancers, but the complex mechanisms underlying this have not been fully elucidated. Inhibitor of DNA binding 1 (Id-1) has been identified as a novel marker of ovarian cancer progression. This study aims to investigate the role of Id-1 in TGFβ1-induced EMT in human ovarian cancer cells. Methods: Ovarian cancer cells expressing or not expressing Id-1 were incubated with TGFβ1. Changes in the EMT markers E-cadherin, vimentin, N-cadherin, Id-1, and miR-29b were detected using western blotting and qPCR analyses. Wound healing, transwell migration, and invasion assays were performed in cells where Id-1 was either knocked down or overexpressed. The effects of transfecting miR-29b mimics and inhibitors on Id-1 mRNA and protein expression were assessed. The interaction between miR-29b and Id-1 was confirmed using a luciferase reporter assay. Results: Id-1 expression was increased and miR-29b expression was repressed in TGFβ1-responsive ovarian cancer cells. Id-1 overexpression increases and Id-1 knockdown decreases cell migration and invasion capacities. Id-1 silencing leads to a partial blocking of TGFβ1-induced EMT. miR-29b negatively regulates Id-1 expression. Direct binding of miR-29b to the 3'UTR region of Id-1 was confirmed using a luciferase reporter assay. Conclusion: Id-1, a protein repressed by miR-29b, facilitates TGFβ1-induced EMT in human ovarian cancer cells and represents a promising therapeutic target for treating ovarian cancer. © 2014 S. Karger AG, Basel.
    Cellular Physiology and Biochemistry 03/2014; 33(3):717-730. DOI:10.1159/000358647 · 2.88 Impact Factor
  • Heart (British Cardiac Society) 10/2013; 99(Suppl 3):A130-A130. DOI:10.1136/heartjnl-2013-304613.354 · 5.60 Impact Factor
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    ABSTRACT: Regulator of G-protein Signaling 10 (Rgs10) plays an important function in osteoclast differentiation. However, the role of Rgs10 in immune cells and inflammatory responses, which activate osteoclasts in inflammatory lesions, such as bacteria-induced periodontal disease lesions, remains largely unknown. In this study, we used an adeno-associated virus (AAV-) mediated RNAi (AAV-shRNA-Rgs10) knockdown approach to study Rgs10's function in immune cells and osteoclasts in bacteria-induced inflammatory lesions in a mouse model of periodontal disease. We found that AAV-shRNA-Rgs10 mediated Rgs10 knockdown impaired osteoclastogenesis and osteoclast-mediated bone resorption, in vitro and in vivo. Interestingly, local injection of AAV-shRNA-Rgs10 into the periodontal tissues in the bacteria-induced inflammatory lesion greatly decreased the number of dendritic cells, T-cells and osteoclasts, and protected the periodontal tissues from local inflammatory damage and bone destruction. Importantly, AAV-mediated Rgs10 knockdown also reduced local expression of osteoclast markers and pro-inflammatory cytokines. Our results demonstrate that AAV-shRNA-Rgs10 knockdown in periodontal disease tissues can prevent bone resorption and inflammation simultaneously. Our data indicate that Rgs10 may regulate dendritic cell proliferation and maturation, as well as the subsequent stimulation of T-cell proliferation and maturation, and osteoclast differentiation and activation. Our study suggests that AAV-shRNA-Rgs10 can be useful as a therapeutic treatment of periodontal disease.
    09/2013; 1(3):267-281. DOI:10.4248/BR201303005
  • Yan Zhang · Pejun Lu · Juan Li · Kun Li · Yue Teng · Xiang Wang · Xu Li
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    ABSTRACT: Osteoporosis is one of the most serious under-diagnosed and under-treated recessive diseases, leading to increased mortality and morbidity as well as huge economic burden. The fundamental reason for the occurrence of osteoporosis lies in the disequilibrium between bone resorption mediated by osteoclasts and bone formation mediated by osteoblasts. Osteoclast-osteoblast communication plays important roles in the maintenance of hemeostasis. In this review, we present the detailed mechanisms of this communication, including modes of diffusible paracrine factors, cell-cell direct contact and cell-bone matrix interaction. We demonstrate that osteoclasts (or osteoblasts) could not only secrete cytokines, growth factors, chemokines and function in a paracrine manner, but also express molecules on their membranes to bind to the receptors on osteoblasts (or osteoclasts) to transduce bidirectional signals. Moreover, growth factors and cytokines deliberated from bone matrix during bone resorption could also regulate the function of both osteoblasts and osteoclasts. This review gives the latest knowledge of communication factors, some of which are emerging as novel therapeutic targets for future development of antiosteoporotic drugs.
    Current drug targets 08/2013; 15(2). DOI:10.2174/13894501113149990200 · 3.02 Impact Factor
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    ABSTRACT: Host genotype and gender are among the factors that influence the composition of gut microbiota. We studied the population structure of gut microbiota in two lines of chickens maintained under the same husbandry and dietary regimes. The lines, which originated from a common founder population, had undergone 54 generations of selection for high (HW) or low (LW) 56-day body weight, and now differ by more than 10-fold in body weight at selection age. Of 190 microbiome species, 68 were affected by genotype (line), gender, and genotype by gender interactions. Fifteen of the 68 species belong to Lactobacillus. Species affected by genotype, gender, and the genotype by gender interaction, were 29, 48, and 12, respectively. Species affected by gender were 30 and 17 in the HW and LW lines, respectively. Thus, under a common diet and husbandry host quantitative genotype and gender influenced gut microbiota composite.
    Scientific Reports 01/2013; 3:1163. DOI:10.1038/srep01163 · 5.58 Impact Factor
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    ABSTRACT: Bactrian camels serve as an important means of transportation in the cold desert regions of China and Mongolia. Here we present a 2.01 Gb draft genome sequence from both a wild and a domestic bactrian camel. We estimate the camel genome to be 2.38 Gb, containing 20,821 protein-coding genes. Our phylogenomics analysis reveals that camels shared common ancestors with other even-toed ungulates about 55-60 million years ago. Rapidly evolving genes in the camel lineage are significantly enriched in metabolic pathways, and these changes may underlie the insulin resistance typically observed in these animals. We estimate the genome-wide heterozygosity rates in both wild and domestic camels to be 1.0 × 10(-3). However, genomic regions with significantly lower heterozygosity are found in the domestic camel, and olfactory receptors are enriched in these regions. Our comparative genomics analyses may also shed light on the genetic basis of the camel's remarkable salt tolerance and unusual immune system.
    Nature Communications 11/2012; 3:1202. DOI:10.1038/ncomms2192 · 11.47 Impact Factor
  • Heart (British Cardiac Society) 10/2012; 98(Suppl 2):E149-E149. DOI:10.1136/heartjnl-2012-302920d.40 · 5.60 Impact Factor
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    ABSTRACT: Objectives Lower urinary tract symptoms (LUTS) resulting from benign prostatic hyperplasia (BPH) are highly prevalent in the aging male population and cause substantial adverse effects on health. There are strong evidences from multiple epidemological studies that LUTS and hypertension are correlated. BPH/LUTS and hypertension are often coexist in the older men. Men with bothersome LUTS may predispose patients to present with various conditions including hypertension, depression and so on. Severe LUTS are likely to constitute a risk factor for the development of hypertension. α(1)-blockers initially introduced for the management of hypertension and have become first-line medical therapy options for BPH/LUTS. This study was conducted to describe the efficacy of the daily therapy, doxazosin as an α(1)-blocker, on BPH/LUTS in men with mild hypertension. Objectives To evaluate the safety and the therapeutic efficacy of doxazosin for mild hypertesion patients with BPH/LUTS. Methods A total of 52 mild hypertension patients concomitant with BPH/LUTS (International Prostate Symptom Score-IPSS>7) at the first visit in our clinic were enrolled in this trial. They were assessed based on IPSS and IPSS-Quality of Life for BPH/LUTS and measurement of blood pressure (BP) in the patients with mild hypertension after excluding those with normotensive and moderate-to-severe hypertension. They were treated with 4 mg of doxazosin once daily for 12 weeks. IPSS, IPSS quality of life, BPH Impact Index and BP measurement were evaluated every 4 weeks. Safety was mainly assessed via spontaneous reports of adverse events. Results After 12 weeks of the medication, changes in IPSS in mild hypertension men concomitant with BPH/LUTS were significantly different before and after treatment (12.6±3.8 vs 8.1±2.6, p<0.01). Doxazosin demonstrated efficacy in lowering the score for IPSS and relieving LUTS. Of them, systolic and diastolic blood pressure of 39 patients (75.0%) decreased to normal. Doxazosin was generally well tolerated. No orthostatic hypotension and other blood pressure-related adverse profiles occurred in all patients. Conclusions Doxazosin therapy appears to be efficacious in both relieving LUTS and decreasing blood pressure in mild hypertension men concomitant with BPH/LUTS.
    Heart (British Cardiac Society) 10/2012; 98(Suppl 2):E289-E289. DOI:10.1136/heartjnl-2012-302920ac.3 · 5.60 Impact Factor
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    ABSTRACT: Purpose Many authors reported that microsurgical varicocelectomy was among the best treatment modalities for varicocele. However, the difference in intraoperative anatomic detail between macroscopic and microsurgical varicocele repair in the same spermatic cord has not been critically discussed. Methods Between August 2010 and February 2011, 32 men with 42 sides’ grade 2–3 varicocele were enrolled in this study. One surgeon firstly mimicked the modified open varicocelectomy by identifying, isolating, and marking the presumed internal spermatic veins, lymphatics, and arteries. Another surgeon then checked the same spermatic cord using operating microscope to investigate the number of missed veins, to be ligated lymphatics and arteries in the “imitative” open varicocelectomy. Results There were significant differences in the average number of internal spermatic arteries (1.67 vs. 0.91), internal spermatic veins (6.45 vs. 4.31), and lymphatics (2.93 vs. 1.17) between microscopic and macroscopic procedure (P < 0.001, P < 0.001, P < 0.001, respectively). Meanwhile, an average of 2.14 ± 1.26 internal spermatic veins was missed; among them, 1.63 ± 1.32 internal spermatic veins adherent to the preserved testicular artery were overlooked. The number of 0.69 ± 0.84 lymphatics and 0.74 ± 0.74 arteries were to be ligated in “macroscopic varicocelectomy.” A number of 1.07 ± 1.11 lymphatics were neither identified nor ligated. In addition, in 2 cases, the vasal vessels of the vas deferens were to be ligated at macroscopic procedure. Conclusions Microsurgical varicocelectomy could preserve more internal spermatic arteries and lymphatic and ligate more veins which may interpret the superiority of microsurgical varicocele repair.
    World Journal of Urology 09/2012; 31(3). DOI:10.1007/s00345-012-0950-x · 2.67 Impact Factor
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    ABSTRACT: CpG-oligonucleotides (CpG-ODNs), mimicking bacterial DNA, have recently been shown to stimulate prostate cancer invasion in vitro via Toll-like receptor 9 (TLR9). Since cyclooxygenase 2 (COX-2), frequently overexpressed in multiple tumor types including prostate cancer, is a causal factor for tumor development, invasion and metastasis, an interesting question is raised whether TLR9 regulates COX-2 expression in prostate cancer cells. To address this question, herein we examined COX-2 expression in PC-3 cells stimulated with different doses and time courses of CpG-ODNs. The regulatory role of NF-kappaB in TLR9-mediated COX-2 expression was also investigated. CpG-ODN was found to up-regulate the expression of COX-2 in PC-3 cells in a dose- and time-dependent manner, but have little impact on COX-1 expression. Moreover, CpG-ODN also promoted nuclear translocation and activation of NF-kappaB, which appeared to be required for COX-2 induction by CpG-ODN. Overall, TLR9 up-regulates COX-2 expression in prostate cancer cells, at least partially through the activation of NF-kappaB, which may be implicated in tumor invasion and metastasis.
    Molecular Biology Reports 08/2009; 37(4):1849-55. DOI:10.1007/s11033-009-9620-5 · 2.02 Impact Factor
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    ABSTRACT: The common surgery for venous leakage was not very successful; unsatisfactory long-term results have reduced the indications for venous surgery for erectile dysfunction (ED). To assess the outcomes of embedding the deep dorsal vein of the penis (EDDVP), a new surgical technique used in patients with penile deep dorsal venous leakage of ED. Between December 2001 and November 2007, 17 patients diagnosed with penile deep dorsal venous leakage of ED underwent embedding the deep dorsal vein of the penis. All cases were available for follow up by using the abridged 5-item version of the International Index of Erectile Function (IIEF-5) scoring system and penile color Doppler ultrasound. Dynamic cavernosography were also assessed in three patients at 3 months postoperatively. After surgery, 14 patients were able to achieve satisfactory intercourse and three had sufficient erection after oral sildenafil (50-100 mg). The IIEF-5 scoring changed from a preoperative mean IIEF-5 score of 8.8 +/- 3.9 to 20.8 +/- 4.1 (P < 0.05). Peak systolic velocity (average of right and left cavernosal arteries) changed from 41.9 +/- 7.7 cm/second to 44.2 +/- 9.2 cm/second (P > 0.05), resistance index changed from 0.79 +/- 0.1 to 1.00 +/- 0.0 (P < 0.05), and venous velocity changed from 8.4 +/- 4.0 cm/second to 0.0 +/- 0.0 cm/second (P < 0.05). Dynamic cavernosography demonstrated a smooth flow of the deep dorsal vein during the flaccid phase. During the tumescent phase, the deep dorsal vein of the penis was compressed between the dilated sinusoidal spaces and the tunica albuginea and resulted in venous drainage blockade. And then the hardness of erection was improved and maintained. The new surgical technique of EDDVP is a simple operative procedure, which seems to be efficient in the treatment of penile deep dorsal venous leakage of ED.
    Journal of Sexual Medicine 05/2009; 6(5):1467-73. DOI:10.1111/j.1743-6109.2008.01080.x · 3.15 Impact Factor

Publication Stats

87 Citations
92.72 Total Impact Points


  • 2014–2015
    • Xi'an Jiaotong University
      • School of Medicine
      Ch’ang-an, Shaanxi, China
    • Shanghai Jiao Tong University
      • School of Agriculture and Biology
      Shanghai, Shanghai Shi, China
  • 2013
    • University of Alabama at Birmingham
      • Department of Pathology
      Birmingham, Alabama, United States
  • 2007–2013
    • Sun Yat-Sen University
      Shengcheng, Guangdong, China
  • 2009
    • Sun Yat-Sen University of Medical Sciences
      • Department of Urology
      Huicheng, Guangdong, China