Zhenfeng Guan

ORCID: 0000-0002-5746-3319
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Research Areas
  • Bladder and Urothelial Cancer Treatments
  • Cancer, Lipids, and Metabolism
  • Cancer, Hypoxia, and Metabolism
  • Angiogenesis and VEGF in Cancer
  • Cell Adhesion Molecules Research
  • Protease and Inhibitor Mechanisms
  • Spectroscopy Techniques in Biomedical and Chemical Research
  • Chemokine receptors and signaling
  • Advanced Battery Materials and Technologies
  • Cancer-related Molecular Pathways
  • Renal cell carcinoma treatment
  • Cancer Research and Treatments
  • Inflammatory mediators and NSAID effects
  • Peroxisome Proliferator-Activated Receptors
  • Epigenetics and DNA Methylation
  • Renal and related cancers
  • Advancements in Battery Materials
  • Nanoplatforms for cancer theranostics
  • Metabolism, Diabetes, and Cancer
  • Prostate Cancer Treatment and Research
  • Autophagy in Disease and Therapy
  • Proteoglycans and glycosaminoglycans research
  • Berberine and alkaloids research
  • Silymarin and Mushroom Poisoning
  • Ferroptosis and cancer prognosis

Qingdao University
2023

First Affiliated Hospital of Xi'an Jiaotong University
2014-2022

Shaanxi Provincial People's Hospital
2015-2022

Shanxi Medical University
2015-2022

Shaanxi Provincial People's Hospital
2021

Xi'an Jiaotong University
2012-2015

First Hospital of Xi'an
2014

Ministry of Education of the People's Republic of China
2013

Bladder cancer (BCa) is the most common malignant disease of urinary tract system, yet etiology still poorly understood. Clinically, majority BCa patients progress to invasive at final stage, leading death. Previous investigations have demonstrated that matrix metal­loproteinases (MMPs) play irreplaceable roles in tumor cell extravasation and implantation. In addition, increasing numbers reports provide evidence MMPs, especially MMP2 MMP9 are monitored by various signal transduction pathways...

10.3892/ijo.2015.3041 article EN International Journal of Oncology 2015-06-09

Abstract Males have a higher incidence of renal cell carcinoma (RCC) than females, but the reason for this gender difference is unknown. Addressing question, we report discovery an androgen receptor (AR)–induced HIF2α/VEGF signal that drives RCC progression. AR attenuation or augmentation in cells altered their proliferation, migration, and invasion multiple models vitro vivo. Mechanistic investigations revealed targeting inhibited migration by modulating signals at level mRNA protein...

10.1158/0008-5472.can-13-2681 article EN Cancer Research 2014-06-13

G9a has been reported to highly express in bladder transitional cell carcinoma (TCC) and inhibition significantly attenuates proliferation, but the underlying mechanism is not fully understood. The present study aimed at examining potential role of autophagy anti-proliferation effect on TCC T24 UMUC-3 lines vitro. We found that both pharmaceutical genetical attenuated proliferation by MTT assay, Brdu incorporation assay colony formation assay. induced like morphology as determined...

10.1371/journal.pone.0138390 article EN cc-by PLoS ONE 2015-09-23

Silibinin, a dietary cancer chemopreventive flavonoid from the seeds of milk thistle, has been reported to exhibit anti-metastatic effects on renal cell carcinoma (RCC), but mechanism underlying this phenomenon is not fully understood. The present study aimed at examining potential role autophagy in regulating silibinin-induced RCC cells. Using ACHN and 786-O cells as model system vitro, we found that silibinin treatment increased expression LC3-II, resulted formation autophagolysosome...

10.3390/ijms16048415 article EN International Journal of Molecular Sciences 2015-04-15

Although neo-adjuvant radiotherapy is generally successful in treatment of advanced prostate cancer, radioresistance still a major therapeutic problem many patients. In the current study, we investigated effects metformin (1,1-dimethylbiguanide hydrochloride), widely used antidiabetic drug, on tumor cell radiosensitivity cancer. Through clonogenic survival assays, found that enhanced cancer cells with dose enhancement factor. Moreover, irradiation subcutaneous C4-2 tumors mice treated...

10.1667/rr13561.1 article EN Radiation Research 2014-05-20

Bladder cancer (BCa) is the most vital urogenital malignant disease worldwide, bringing huge economic and social burden every year. Clinically, BCa subdivided into superficial type invasive according to clinic-pathology, accompanied with different strategy of therapy. Number reports indicate that 10-30% will inevitable progress type, manifesting enhanced behavior compared original type. Regardless being an or progressed from BCa, chemotherapy (including adjuvant neo-adjuvant chemotherapy) in...

10.3892/ijo.2015.3256 article EN International Journal of Oncology 2015-11-20

Although important progress has been made in elucidating the role of tumor microenvironment development bladder cancer, little is currently known regarding interactions with vascular endothelial cells (ECs) that promote cancer progression. In present study, it reported epidermal growth factor receptor ligands induced by upregulation (VEGF)‑A and VEGF‑C via VEGF (R)2/nuclear factor‑κB signaling pathway ECs, may trigger EGFR Furthermore, interaction between ECs enhanced EC recruitment though...

10.3892/ijo.2019.4729 article EN cc-by-nc-nd International Journal of Oncology 2019-02-27

We evaluated the feasibility of Raman spectroscopy (RS) in diagnosis and prognosis castration-resistant prostate cancer (CRPC) patients with (PC).Raman spectra are detected from PC cell lines (LNCaP C4-2) tissues using a Labram HR 800 RS. Then, principal component analysis (PCA) support vector machine (SVM) applied for prediction. A leave-one-out cross-validation is used to train test SVM.There 50 qualified patients, including 33 androgen-dependent (ADPC) 17 CRPC. The spectral changes at...

10.1117/1.jbo.18.8.087001 article EN cc-by Journal of Biomedical Optics 2013-08-01

Bladder cancer is the most common malignancy of urinary tract for which accurate measurement minimal residual disease critical to treatment and determining prognosis. Although cystoscope examination voided urine cytology remain current standard care detecting disease, these approaches are limited by mechanical trauma lack sensitivity. To develop a new noninvasive method, we developed novel contrast agent where surface superparamagnetic iron oxide (SPIO) nanoparticles functionalized with...

10.18632/oncotarget.13578 article EN Oncotarget 2016-11-24

Abstract Androgen receptor (AR) signaling may promote renal cell carcinoma (RCC) progression via altered HIF-2α/VEGF signaling. However, it remains unclear whether AR also promotes RCC by recruiting vascular endothelial cells (ECs), key players in the development of blood vessels. In our study, increased EC proliferation and recruitment to tumor microenvironment promoted progression. Mechanistically, modulated cytokine CXCL5 expression altering AKT → NF-κB signaling, interruption using...

10.1038/srep37085 article EN cc-by Scientific Reports 2016-11-16

Hypoxia is a characteristic feature of solid tumors, leading to malignant behavior. During this process, HIF family members (HIFs) and the NF-κB pathway are activated. In addition, hypoxia-associated factor (HAF) reported participate in regulation HIFs. However, precise relationship among HIFs, HAF bladder cancer (BC) remains unknown. current investigation, T24 BC cells were exposed hypoxia, or by plasmid transfection overexpress RelA (P65) demonstrate their roles. The results indicate that...

10.3892/ijo.2013.2210 article EN cc-by-nc International Journal of Oncology 2013-12-06

// Tingting Zhang 1, * , Kaijie Wu Chen Ding 2, Kangwei Sun 1 Zhenfeng Guan Xinyang Wang Jer-Tsong Hsieh 3 Dalin He Jinhai Fan Department of Urology, The First Affiliated Hospital Xi’an Jiaotong University, Xi’an, Shaanxi Province, China 2 Xiangyang Central Hospital, Hubei University Arts and Science, Xiangyang, Texas Southwestern Medical Center, Dallas, TX, USA These authors have contributed equally to this work Correspondence to: Fan, e-mail: jinhaif029@126.com Keywords:...

10.18632/oncotarget.5622 article EN Oncotarget 2015-10-08

Abstract Background Bladder Cancer (BCa) is a severe genitourinary tract disease with an uncertain pathology. Increasing evidence indicates that the tumor microenvironment plays decisive role respect to cancer progression, and this driven by cell interactions stromal components. Tenascin-C (TN-C) important extracellular matrix (ECM) component, which has been reported be involved in other types of cancer, such as breast cancer. The expression TN-C BCa tissue positively associated pathological...

10.1186/s12885-022-09285-x article EN cc-by BMC Cancer 2022-03-04

TiO2 is a promising anode material for lithium-ion batteries (LIBs) due to its low cost, suitable operating voltage, and excellent structural stability. The inherent poor electron conductivity ion diffusion coefficient, however, severely limit application in lithium storage. Here, Co-doped synthesized by hydrothermal method as an since Co@TiO2 possesses large specific surface area high electronic conductivity. Thanks the Co dopants, transport are both greatly improved, which very beneficial...

10.3390/ma16041325 article EN Materials 2023-02-04

Because bladder cancer (BCa) is the 9th most common malignant tumor and 13th leading cause of death due to cancer, therapeutic approaches have attracted a great deal attention from both clinicians BCa patients. Although development surgery targeted drugs has brought new challenges for traditional concept therapy, various types chemotherapy remain final treatment method many However, chemoresistance inevitably appears, failure chemotherapy. Silibinin, polyphenolic flavonoid component isolated...

10.3892/ijo.2017.4089 article EN International Journal of Oncology 2017-08-02

Urine biomarkers offer a non‑invasive method of detecting bladder cancer, monitoring disease progression and predicting recurrence therapeutic treatment efficacy. Tenascin‑C (TN‑C), as component the extracellular matrix, is vital in cancer. However, there little to report with regard urine TN‑C its correlation cancer grade, stage, prognosis. In present study, 66 samples voided from patients 42 volunteers were obtained. The concentration was determined using an ELISA assay. between tumor...

10.3892/mmr.2013.1873 article EN Molecular Medicine Reports 2013-12-18

Males have a higher incidence of renal cell carcinoma (RCC) than females, but the reason for this gender difference is unknown. Addressing question, we report discovery an androgen receptor (AR)- induced HIF2a/VEGF signal that drives RCC progression. AR attenuation or augmentation in cells altered their proliferation, migration, and invasion multiple models vitro vivo. Mechanistic investigations revealed targeting inhibited migration by modulating HIF2a/ VEGF signals at level mRNA protein...

10.3978/j.issn.2223-4683.2014.s130 article EN Translational Andrology and Urology 2014-12-09

Abstract Background : The main issue arising from bladder cancer (BCa) is the high relapse ratio and tumor progression, mechanism of which remains to be elucidated. Interaction cells with stroma microenvironment promoting progression warrants much attention researchers. Among all stromal cells, endothelial (ECs) are exceptional. Numerous studies have investigated its role angiogenesis, but not studied immunocyte recruitment chemokine secretion, important significance in has been proven....

10.21203/rs.3.rs-60078/v1 preprint EN cc-by Research Square (Research Square) 2020-08-21
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