Publications by authors named "Wei-gang Yan"

Background: Prostate cancer is the second most common cancer in men, and some new target genes are needed to predict the risk of prostate cancer progression and the treatment.

Methods: In this study, the effects of UAP1L1 (UAP1-like-1) on prostate cancer were investigated by detecting the proliferation, migration, invasion and apoptosis of prostate cancer cells in vitro using MTT, wound healing, Transwell and flow cytometry assay, and the tumor growth in vivo. The downstream genes and pathways of UAP1L1 were explored using Ingenuity Pathway Analysis (IPA), and screened by qRT-PCR and western blot.

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Introduction: The classical pathway for the therapy of low- to intermediate-risk localized prostate cancer is radical prostatectomy or radiation therapy, which has shown a high incidence of complications, including erectile dysfunction, urinary incontinence, and bowel injury. An alternative pathway is to perform an ablation by some energy to the localized lesion, known as focal therapy. High-frequency irreversible electroporation (H-FIRE) is nonthermal energy that can be used in cancer ablation to deliver pulsed high-voltage but low-energy electric current to the cell membrane and to invoke cell death.

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Objectives Transmuscular quadratus lumborum block (TQLB) may provide postoperative analgesia in patients undergoing intraperitoneal surgeries. The purpose of this study was to examine the potential efficacy of TQLB among patients undergoing retroperitoneal procedures, such as the laparoscopic partial nephrectomy (LPN). Methods This prospective, randomized, controlled study was conducted from August 2017 to November 2018 at Peking Union Medical College Hospital (Beijing, China).

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Background: Biopsy Gleason score (GS) is crucial for prostate cancer (PCa) treatment decision-making. Upgrading in GS from biopsy to radical prostatectomy (RP) puts a proportion of patients at risk of undertreatment.

Purpose: To develop and validate a radiomics model based on multiparametric magnetic resonance imaging (mp-MRI) to predict PCa upgrading.

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Introduction: Accumulating evidence has revealed the critical roles of long noncoding RNAs (lncRNAs) in various cancers. LncRNA SNHG20 has been shown to be a cancer-associated lncRNA in several cancers with diverse mechanisms. However, the clinical references, biological roles, and mechanisms of action of SNHG20 in prostate cancer (PCa) are still unclear.

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Background: To evaluate the evidence available on the effects and safety of tension-free vaginal tape (TVT) versus transobturator tape (TOT) for female stress urinary incontinence therapy based on randomized controlled trials (RCTs).

Methods: PubMed, Cochrane, Embase, Wanfang, China National Knowledge Infrastructure, and Weipu database were searched up to July 2017 to identify relevant studies, including qualified RCT and quite-RCT and literature sources. Relative risks (RRs), mean difference (MD), and 95% CI were calculated in our review.

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Background: Incidence of intraoperative vaginal perforation is generally considered to be low but varies among different procedures. Vaginal perforation could not only prolong the surgeries and aggravate surgical trauma but also result in postoperative discomfort or even a second surgery.

Method: Vaginal perforation, vaginal epithelial perforation, vaginal wall perforation, vaginal penetration, urinary incontinence were searched in PubMed, Cochrane, Embase database to identify the qualified clinical trial and relevant literature sources were also searched.

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Rationale: Postoperative hemorrhage is a rare complication after laparoscopic radical prostatectomy (LRP), with no case reports of bleeding from the external iliac artery in the literature.

Patient Concerns: A 73-year-old man diagnosed with clinical stage 2c prostate cancer underwent LRP successfully with only approximately 200 mL of intraoperative blood loss. However, his blood pressure dropped from 135/74 to 80/49 mm Hg and his hemoglobin decreased by 66 g/L compared with the preoperative level within 5 hours.

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Objective To evaluate the application of weak cation exchange (WCX) magnetic bead-based Matrix-Assisted Laser Desorption Ionization Time-of-Flight Mass Spectrometry (MALDI-TOF MS) in detecting differentially expressed proteins in the urine of renal clear cell carcinoma (RCCC) and its value in the early diagnosis of RCCC.Methods Eleven newly diagnosed patients (10 males and 1 female, aged 46-78, mean 63 years) of renal clear cell carcinoma by biopsy and 10 healthy volunteers (all males, aged 25-32, mean 29.7 years) were enrolled in this study.

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Objective: To evaluate the outcomes of T3a prostate cancer with unfavorable prognostic factors treated with permanent interstitial brachytherapy combined with external radiotherapy and hormone therapy.

Methods: From January 2003 to December 2008, 38 patients classified as T3a prostate cancer with unfavorable prognostic factors were treated with trimodality therapy (brachytherapy + external radiotherapy + hormone therapy). The prescription dose of brachytherapy and external radiotherapy were 110 Gy and 45 Gy, respectively.

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Objective: To evaluate the clinical characteristics and outcomes of patients with Gleason score 10 prostate cancer treated by external radiotherapy and hormone therapy.

Methods: From January 2003 to March 2014, 1832 patients with prostate cancer were treated, among which 9 patients (represented 0.49%) were identified as Gleason score 10 disease on prostate core biopsy without distant metastases when first diagnosed.

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Aims And Background: To evaluate long-term outcome and biochemical progression-free survival (bPFS) in high-risk prostate cancer patients treated with brachytherapy combined with external-beam radiation therapy (EBRT) and androgen deprivation therapy (ADT).

Methods And Study Design: We retrospectively analyzed 97 high-risk prostate cancer patients treated with brachytherapy combined with EBRT and ADT. During follow-up, the post-operation prostate-specific antigen (PSA) level was monitored regularly and biochemical relapse, progression to castration-resistant prostate cancer or metastases, and causes of death were documented.

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Objective: To analyze the complications of laparoscopic surgery for the past 11 years in the Urology Department of Peking Union Medical College Hospital.

Methods: The laparoscopic surgery of 5 386 cases from Jan. 2002 to Dec.

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Renal cell carcinoma is a tumor in kidney, while gastrointestinal stromal tumors are localized in the stomach and small intestine. They seldom occur simultaneously in sporadic case, both of which were suspective to sunitinib, a tyrosine kinases (RTKs) inhibitor. Our current case is novel in that concurrent RTK-related tumors are involved in one case.

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Background: The objective of this study was to evaluate the clinical application value of in situ hypothermic perfusion of kidneys during retroperitoneal laparoscopic partial nephrectomy (RLPN).

Methods: We used in situ hypothermic perfusion of kidneys during RLPN in 12 patients with renal tumour. Renal arterial-catheterisation for temporary balloon occlusion of renal artery was used Hypothermic ischaemia was achieved by continuous perfusion of Ringer's solution at 4°C through the renal artery.

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Objective: To explore the values of adrenocorticotropic hormone receptor (ACTH-R) determination and ultrastructural observation of tumor cells in the subtyping of adrenocortical neoplasms (ANs).

Methods: The expression of ACTH-R in 87 AN tissues were determined with Polymer immunohistochemical staining, with 10 normal adrenal tissues as the controls. The ultrastructure of the tumor cells was observed using electron microscopy.

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Objective: To detect the expressions of receptor tyrosine kinases (RTKs) mRNA and protein and to explore potentially promising tumor markers and conceivable drug target in bladder cancer.

Methods: The expressions of RTKs mRNA and protein in tissue from invasive urothelial carcinoma of the bladder were examined by real-time quantitative PCR array and cytokine antibody array, with normal bladder tissue as control. The Results were analyzed using bioinformatic approaches.

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Objective: To screen for the differential protein peaks of renal cell carcinoma (RCC) using magnetic beads-based matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS).

Methods: Serum proteins were profiled by magnetic beads (WCX) from 62 RCC patients and 37 patients with benign renal space-occupying lesions. Protein peaks were identified by MALDI-TOF-MS.

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Objective: To investigate the clinical features of paraneoplastic syndromes (PNS) in patients with renal, prostate and bladder cancer and conduct a brief prognostic analysis.

Methods: From 2008 to 2010, 464 patients of renal cell carcinoma (RCC) confirmed by operation and pathology were reviewed retrospectively. And 562 cases of patients with prostate cancer and 647 with bladder cancer from 2005 to 2010 were also analyzed respectively.

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Object: The purpose was to highlight the diagnosis and treatment of extra-adrenal para-gangliomas, which often causes catecholamine hypersecretion and hypertension.

Methods: 67 cases of extra-adrenal paraganglioma of retroperitoneum proven pathologically from 1999 to 2009 were reviewed and studied after operation. Endocrine secretion examinations, B-US, CT, MRI, 131-MIBG, octreotide and hands microcirculation inspection were used to diagnose the disease.

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Background: Cushing's disease is a pituitary-dependent type of Cushing's syndrome. Treatment consists of pituitary surgery or radiotherapy, but the recurrence rate at 10 years is as high as 40%. Adrenalectomy is considered an effective treatment to refractory Cushing's disease.

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Objective: To evaluate the safety and efficacy of retroperitoneal laparoscopic resection for pheochromocytoma.

Methods: The clinical data of 107 cases of pheochromocytoma in PUMCH from 2003 to 2008 were analyzed retrospectively. There were 58 males and 49 females with an age range from 8 to 77 years (mean 44 years) in this cohort.

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Objectives: To investigate the expression of Ki-67 antigen in benign and malignant pheochromocytomas, and to evaluate whether the expression of Ki-67 antigen could serve as a diagnostic marker for predicting the biological behaviour of these tumors.

Methods: Ki-67 antigen were detected by immunohistochemical technique and image analysis in 57 cases of clinically documented benign and malignant pheochromocytomas were analyzed. Aside from histological study, Ki-67 immunohistochemistry studies were performed to get the Ki-67 index.

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Objective: To improve the diagnostic and therapeutic ability on subclinical Cushing's syndrome.

Methods: Retrospective analysis for the clinical data of 24 cases of subclinical Cushing's syndrome, the clinical and biological characters pre and post operation were compared.

Results: None of the 24 cases of subclinical Cushing's syndrome had the classic symptoms and signs of Cushing's syndrome.

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