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Noto JM, Piazuelo MB, Romero-Gallo J, Delgado AG, Suarez G, Akritidou K, Girod Hoffman M, Roa JC, Taylor CT, Peek RM. Targeting hypoxia-inducible factor-1 alpha suppresses Helicobacter pylori-induced gastric injury via attenuation of both cag-mediated microbial virulence and proinflammatory host responses. Gut Microbes 2023; 15:2263936. [PMID: 37828903 PMCID: PMC10578190 DOI: 10.1080/19490976.2023.2263936] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Accepted: 09/24/2023] [Indexed: 10/14/2023] Open
Abstract
Helicobacter pylori-induced inflammation is the strongest known risk factor for gastric adenocarcinoma. Hypoxia-inducible factor-1 (HIF-1α) is a key transcriptional regulator of immunity and carcinogenesis. To examine the role of this mediator within the context of H. pylori-induced injury, we first demonstrated that HIF-1α levels were significantly increased in parallel with the severity of gastric lesions in humans. In interventional studies targeting HIF-1α, H. pylori-infected mice were treated ± dimethyloxalylglycine (DMOG), a prolyl hydroxylase inhibitor that stabilizes HIF-1α. H. pylori significantly increased proinflammatory chemokines/cytokines and inflammation in vehicle-treated mice; however, this was significantly attenuated in DMOG-treated mice. DMOG treatment also significantly decreased function of the H. pylori type IV secretion system (T4SS) in vivo and significantly reduced T4SS-mediated NF-κB activation and IL-8 induction in vitro. These results suggest that prolyl hydroxylase inhibition protects against H. pylori-mediated pathologic responses, and is mediated, in part, via attenuation of H. pylori cag-mediated virulence and suppression of host proinflammatory responses.
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Affiliation(s)
- Jennifer M. Noto
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - M. Blanca Piazuelo
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Judith Romero-Gallo
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Alberto G. Delgado
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | - Giovanni Suarez
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
| | | | | | - Juan Carlos Roa
- Department of Pathology, School of Medicine, Center for Cancer Prevention and Control (CECAN), Pontificia Universidad Catolica de Chile, Santiago, Chile
| | - Cormac T. Taylor
- School of Medicine, Systems Biology Ireland and The Conway Institute, University College Dublin, Dublin, Ireland
| | - Richard M. Peek
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, USA
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN, USA
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Yang Z, Ni B, Zhou T, Huang Z, Zhou H, Zhou Y, Lin S, He C, Liu X. HIF-1α Reduction by Lowering Intraocular Pressure Alleviated Retinal Neovascularization. Biomolecules 2023; 13:1532. [PMID: 37892214 PMCID: PMC10605289 DOI: 10.3390/biom13101532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 10/12/2023] [Accepted: 10/14/2023] [Indexed: 10/29/2023] Open
Abstract
Hypoxia-induced retinal neovascularization is a leading cause of blindness worldwide. Oxygen-induced retinopathy (OIR) mouse, a well-established angiogenesis model, has been extensively used to evaluate the effect of anti-angiogenic agents through intravitreal injection. Here, we serendipitously found that the needles used for intravitreal injection caused an unexpected "anti-angiogenic" effect in the OIR mice. To evaluate the effects of various intravitreal puncture sizes on retinal neovascularization and explore the potential underlying mechanism, intravitreal punctures using 0.5 mm (25 G), 0.3 mm (30 G), or 0.21 mm (33 G) needles were performed in OIR mice. Compared with 0.3 mm and 0.21 mm puncture, the 0.5 mm puncture remarkably suppressed the formation of pathological angiogenesis, inhibited vascular leakage, and remodeled the retinal vasculature. Mechanistically, the 0.5 mm puncture induced a substantial reduction in intraocular pressure (IOP), leading to an improvement in oxygen partial pressure (pO2) and significant reduction in Hif1a expression, resulting in resolution of angiogenic and inflammatory responses. Furthermore, IOP-lowering drugs, Travatan or Azarga, also promoted the alleviation of hypoxia and exhibited a potent anti-angiogenesis efficacy. Our study revealed an acute and significant reduction in IOP caused by a large puncture, which could remarkably suppress HIF-1α-mediated retinal neovascularization, indicating that lowering IOP may be a promising therapeutic avenue for treating retinal neovascular diseases.
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Affiliation(s)
- Ziqi Yang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China; (Z.Y.); (B.N.); (T.Z.); (Z.H.); (H.Z.); (Y.Z.); (S.L.)
| | - Biyan Ni
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China; (Z.Y.); (B.N.); (T.Z.); (Z.H.); (H.Z.); (Y.Z.); (S.L.)
| | - Tian Zhou
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China; (Z.Y.); (B.N.); (T.Z.); (Z.H.); (H.Z.); (Y.Z.); (S.L.)
| | - Zijing Huang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China; (Z.Y.); (B.N.); (T.Z.); (Z.H.); (H.Z.); (Y.Z.); (S.L.)
- Joint Shantou International Eye Center of Shantou University and The Chinese University of Hong Kong, Shantou 515041, China
| | - Hong Zhou
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China; (Z.Y.); (B.N.); (T.Z.); (Z.H.); (H.Z.); (Y.Z.); (S.L.)
| | - Yang Zhou
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China; (Z.Y.); (B.N.); (T.Z.); (Z.H.); (H.Z.); (Y.Z.); (S.L.)
| | - Shiya Lin
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China; (Z.Y.); (B.N.); (T.Z.); (Z.H.); (H.Z.); (Y.Z.); (S.L.)
| | - Chang He
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China; (Z.Y.); (B.N.); (T.Z.); (Z.H.); (H.Z.); (Y.Z.); (S.L.)
| | - Xialin Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangzhou 510060, China; (Z.Y.); (B.N.); (T.Z.); (Z.H.); (H.Z.); (Y.Z.); (S.L.)
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Huang YJ, Chen YT, Huang CM, Kuo SH, Liao YY, Jhang WY, Wang SH, Ke CC, Huang YH, Cheng CM, Huang MY, Chuang CH. HIF-1α Expression Increases Preoperative Concurrent Chemoradiotherapy Resistance in Hyperglycemic Rectal Cancer. Cancers (Basel) 2022; 14. [PMID: 36011045 DOI: 10.3390/cancers14164053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 08/09/2022] [Accepted: 08/16/2022] [Indexed: 11/24/2022] Open
Abstract
Purpose: Preoperative concurrent chemoradiotherapy (CCRT) is the standard treatment for locally advanced rectal cancer patients. However, the poor therapeutic efficacy of CCRT was found in rectal cancer patients with hyperglycemia. This study investigated how hyperglycemia affects radiochemotherapy resistance in rectal cancer. Methods and Materials: We analyzed the correlation between prognosis indexes with hypoxia-inducible factor-1 alpha (HIF-1α) in rectal cancer patients with preoperative CCRT. In vitro, we investigated the effect of different concentrated glucose of environments on the radiation tolerance of rectal cancers. Further, we analyzed the combined HIF-1α inhibitor with radiation therapy in hyperglycemic rectal cancers. Results: The prognosis indexes of euglycemic or hyperglycemic rectal cancer patients after receiving CCRT treatment were investigated. The hyperglycemic rectal cancer patients (n = 13, glycosylated hemoglobin, HbA1c > 6.5%) had poorer prognosis indexes. In addition, a positive correlation was observed between HIF-1α expression and HbA1c levels (p = 0.046). Therefore, it is very important to clarify the relationship between HIF-1α and poor response in patients with hyperglycemia receiving pre-operative CCRT. Under a high glucose environment, rectal cancer cells express higher levels of glucose transport 1 (GLUT1), O-GlcNAc transferase (OGT), and HIF-1α, suggesting that the high glucose environment might stimulate HIF-1α expression through the GLUT1-OGT-HIF-1α pathway promoting tolerance to Fluorouracil (5-FU) and radiation. In the hyperglycemic rectal cancer animal model, rectal cancer cells confirmed that radiation exposure reduces apoptosis by overexpressing HIF-1α. Combining HIF-1α inhibitors was able to reverse radioresistance in a high glucose environment. Lower HIF-1α levels increased DNA damage in tumors leading to apoptosis. Conclusions: The findings here show that hyperglycemia induces the expression of GLUT1, OGT, and HIF-1α to cause CCRT tolerance in rectal cancer and suggest that combining HIF-1α inhibitors could reverse radioresistance in a high glucose environment. HIF-1α inhibitors may be useful for development as CCRT sensitizers in patients with hyperglycemic rectal cancer.
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Duscher D, Maan ZN, Hu MS, Thor D. A single-center blinded randomized clinical trial to evaluate the anti-aging effects of a novel HSF™-based skin care formulation. J Cosmet Dermatol 2020; 19:2936-2945. [PMID: 32306525 DOI: 10.1111/jocd.13356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 01/09/2020] [Accepted: 02/17/2020] [Indexed: 12/01/2022]
Abstract
BACKGROUND Similar to chronic wounds, skin aging is characterized by dysfunction of key cellular regulatory pathways. The hypoxia-inducible factor-1 alpha (HIF-1α) pathway was linked to both conditions. Recent evidence suggests that modulating this pathway can rejuvenate aged fibroblasts and improve skin regeneration. Here, we describe the application of a novel HIF stimulating factor (HSF™)-based formulation for skin rejuvenation. METHODS Over a period of 6 weeks using a split-face study design, the effects on skin surface profile, skin moisture, and transepidermal water loss were determined in 32 female subjects (mean age 54, range 32-67 years) by Fast Optical in vivo Topometry of Human Skin (FOITSHD ), Corneometer, and Tewameter measurements. In addition, a photo documentation was performed for assessment by an expert panel and a survey regarding subject satisfaction was conducted. RESULTS No negative skin reactions of dermatological relevance were documented for the test product. A significant reduction in skin roughness could be demonstrated. The clinical evaluation of the images using a validated method confirmed significant improvement of wrinkles, in particular of fine wrinkles, lip wrinkles, and crow's feet. A significant skin moisturizing effect was detected while skin barrier function was preserved. The HSF™-based skin care formulation resulted in a self-reported 94% satisfaction rate. CONCLUSION With no negative skin reactions and highly significant effects on skin roughness, wrinkles, and moisturization, the HSF™-based skin care formulation achieved very satisfying outcomes in this clinical trial. Given the favorable results, this approach represents a promising innovation in aesthetic and regenerative medicine.
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Affiliation(s)
- Dominik Duscher
- Department of Plastic and Hand Surgery, Technical University Munich, Munich, Germany.,Section of Plastic Surgery, Johannes Kepler University Linz, Linz, Austria.,Tomorrowlabs GmbH, Wien, Austria
| | - Zeshaan N Maan
- Hagey Laboratory for Pediatric Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Michael S Hu
- Department for Plastic Surgery, University of Pittsburgh, Pittsburgh, PA, USA
| | - Dominik Thor
- College of Pharmacy, University of Florida, Gainesville, FL, USA.,Tomorrowlabs GmbH, Wien, Austria
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Chen YF, Pandey S, Day CH, Chen YF, Jiang AZ, Ho TJ, Chen RJ, Padma VV, Kuo WW, Huang CY. Synergistic effect of HIF-1α and FoxO3a trigger cardiomyocyte apoptosis under hyperglycemic ischemia condition. J Cell Physiol 2017; 233:3660-3671. [PMID: 29030976 DOI: 10.1002/jcp.26235] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 09/29/2017] [Indexed: 01/19/2023]
Abstract
Cardiomyocyte death is an important pathogenic feature of ischemia and heart failure. Through this study, we showed the synergistic role of HIF-1α and FoxO3a in cardiomyocyte apoptosis subjected to hypoxia plus elevated glucose levels. Using gene specific small interfering RNAs (siRNA), semi-quantitative reverse transcriptase polymerase chain reaction (RT-PCR), Western blot, immunofluorescence, nuclear and cytosolic localization and TUNEL assay techniques, we determined that combined function of HIF-1α and FoxO3a under high glucose plus hypoxia condition lead to enhanced expression of BNIP3 inducing cardiomyocyte death. Our results highlighted the importance of the synergistic role of HIF-1α and FoxO3a in cardiomyocyte death which may add insight into therapeutic approaches to pathophysiology associated with ischemic diabetic cardiomyopathies.
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Affiliation(s)
- Ya-Fang Chen
- Graduate Institute of Basic Medical Science, China Medical University, Taichung, Taiwan.,Department of Obstetrics and Gynecology, Taichung Veteran's General Hospital, Taichung, Taiwan
| | - Sudhir Pandey
- Graduate Institute of Basic Medical Science, China Medical University, Taichung, Taiwan
| | | | - Yu-Feng Chen
- Section of Cardiology, Yuan Rung Hospital, Yuanlin, Taiwan
| | - Ai-Zhi Jiang
- Graduate Institute of Basic Medical Science, China Medical University, Taichung, Taiwan
| | - Tsung-Jung Ho
- School of Medicine, College of Medicine, China Medical University, Taichung, Taiwan
| | - Ray-Jade Chen
- Department of Surgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Vijaya V Padma
- Department of Biotechnology, Bharathiar University, Coimbatore, India
| | - Wei-Wen Kuo
- Department of Biological Science and Technology, China Medical University, Taichung, Taiwan
| | - Chih-Yang Huang
- Graduate Institute of Basic Medical Science, China Medical University, Taichung, Taiwan.,School of Medicine, College of Medicine, China Medical University, Taichung, Taiwan.,Faculty of Applied Sciences, Ton Duc Thang University, Tan Phong Ward, Ho Chi Minh City, Vietnam.,Department of Biological Science and Technology, Asia University, Taichung, Taiwan
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Lee YJ, Bernstock JD, Nagaraja N, Ko B, Hallenbeck JM. Global SUMOylation facilitates the multimodal neuroprotection afforded by quercetin against the deleterious effects of oxygen/glucose deprivation and the restoration of oxygen/glucose. J Neurochem 2016; 138:101-16. [PMID: 27087120 DOI: 10.1111/jnc.13643] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2015] [Revised: 04/05/2016] [Accepted: 04/06/2016] [Indexed: 12/13/2022]
Abstract
The putative neuroprotective properties of various flavonoids have long been reported. Among this class of chemicals, quercetin, a major flavone/flavonol naturally occurring in plants, deserves focused attention because of the myriad of beneficial effects observed in various in vitro and in vivo models of central nervous system damage/degeneration. However, the mechanisms governing the beneficial outcomes mediated by quercetin remain to be elucidated. In an effort to define the underlying molecular mechanisms, our study employed human/rat neuroblastoma cell lines (SHSY5Y and B35, respectively) and E18-derived rat primary cortical neurons upon which the effects of various flavonoids were examined. Of note, increases in the levels of global SUMOylation, a post-translational modification with the Small Ubiquitin-like MOdifier (SUMO) were pronounced. Quercetin treatment increased SUMOylation levels in both SHSY5Y cells and rat cortical neurons in a dose and time-dependent manner, possibly via the direct inactivation of certain SENPs (SUMO-specific isopeptidases). Of particular interest, cells treated with quercetin displayed increased tolerance to oxygen/glucose deprivation exposure, an in vitro model of ischemia. SHSY5Y cells treated with quercetin also increased the expression of Nrf2 (via a decrease in the levels of Keap1), heme oxygenase-1 (HO-1), and nitric oxide synthase 1 (NOS1), which provide further protection from oxidative stress. In addition, the increased SUMOylation of HIF-1α was noted and deemed to be significant. We hypothesize that SUMOylated HIF-1α plays a fundamental role in the protection afforded and may underlie some of quercetin's ability to protect cells from oxygen/glucose deprivation-induced cell death, via an up-regulation of HO-1 and NOS1, which ultimately leads to the induction of pro-life NOS1/protein kinase G signaling. Quercetin acts to increase survival in the face of ischemia via an increase of SENP3 expression, the possible inactivation of SENPs 1/2, and via a decrease in KEAP1 levels (thereby increasing Nrf2 stability). These changes may then lead to increase in HIF-1α SUMOylation and HO-1 activation, followed by an up-regulation of NOS1/PKG signaling. Pathways altered via quercetin treatment within our experimental system are represented by blue arrowheads. Solid black arrows represent relationships that have been explored while a dotted arrow represents a relationship that has yet to be confirmed.
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Affiliation(s)
- Yang-Ja Lee
- Stroke Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health (NINDS/NIH), Bethesda, Maryland, USA
| | - Joshua D Bernstock
- Stroke Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health (NINDS/NIH), Bethesda, Maryland, USA
| | - Nandakumar Nagaraja
- Stroke Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health (NINDS/NIH), Bethesda, Maryland, USA
| | - Brian Ko
- Stroke Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health (NINDS/NIH), Bethesda, Maryland, USA
| | - John M Hallenbeck
- Stroke Branch, National Institute of Neurological Disorders and Stroke, National Institutes of Health (NINDS/NIH), Bethesda, Maryland, USA
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Wang X, Ren H, Zhao T, Ma W, Dong J, Zhang S, Xin W, Yang S, Jia L, Hao J. Single nucleotide polymorphism in the microRNA-199a binding site of HIF1A gene is associated with pancreatic ductal adenocarcinoma risk and worse clinical outcomes. Oncotarget 2016; 7:13717-29. [PMID: 26872370 PMCID: PMC4924673 DOI: 10.18632/oncotarget.7263] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 01/29/2016] [Indexed: 12/17/2022] Open
Abstract
Hypoxia-inducible factor-1 alpha (HIF-1α) is over-expressed in many cancers including pancreatic ductal adenocarcinoma (PDAC) and correlated with poor prognosis. We aim to determine the effect of germline genetic variants on the regulation of the homeostasis of the miRNA-gene regulatory loop in HIF1A gene and PDAC risk. HIF1A rs2057482 single nucleotide polymorphism (SNP) was genotyped in 410 PDAC cases and 490 healthy controls. The CC genotype SNP HIF1A is significantly correlated with PDAC risk (OR = 1.719, 95% CI: 1.293-2.286) and shorter overall survival (OS, P<0.0001) compared with the CT/TT alleles group. The C/T variants of rs2057482, a SNP located near the miR-199a binding site in HIF1A, could lead to differential regulation of HIF1A by miR-199a. Specifically, the C allele of rs2057482 weakened miR-199a-induced repression of HIF-1α expression on both mRNA and protein levels. In the PDAC tissue, individuals with the rs2057482-CC genotype expressed significantly higher levels of HIF-1α protein than those with the rs2057482-CT/TT genotype (P<0.0001). Both the CC genotype of SNP HIF1A and increased HIF-1α expression are significantly associated with shorter OS of patients with PDAC. After adjusted by TNM staging, differentiation grade, and the levels of CA19-9, both SNP HIF1A and HIF-1α expression retained highly significance on OS (P<0.0001). Taken together, our study demonstrates that host genetic variants could disturb the regulation of the miR-199a/HIF1A regulatory loop and alter PDAC risk and poor prognosis. In conclusion, the rs2057482-CC genotype increases the susceptibility to PDAC and associated with cancer progression.
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Affiliation(s)
- Xiuchao Wang
- Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute and Hospital, Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, Tianjin 300060, China
| | - He Ren
- Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute and Hospital, Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, Tianjin 300060, China
| | - Tiansuo Zhao
- Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute and Hospital, Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, Tianjin 300060, China
| | - Weidong Ma
- Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute and Hospital, Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, Tianjin 300060, China
| | - Jie Dong
- Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute and Hospital, Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, Tianjin 300060, China
| | - Shengjie Zhang
- Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute and Hospital, Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, Tianjin 300060, China
| | - Wen Xin
- Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute and Hospital, Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, Tianjin 300060, China
| | - Shengyu Yang
- Department of Tumor Biology and Comprehensive Melanoma Research Center, H. Lee Moffitt Cancer Center & Research Institute, Tampa, FL 33612, USA
| | - Li Jia
- Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute and Hospital, Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, Tianjin 300060, China
- Centre for Haemato-Oncology, Barts Cancer Institute, Queen Mary University of London, London EC1M 6BQ, United Kingdom
| | - Jihui Hao
- Department of Pancreatic Cancer, Tianjin Medical University Cancer Institute and Hospital, Key Laboratory of Cancer Prevention and Therapy, National Clinical Research Center for Cancer, Tianjin 300060, China
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Zhang W, Yuan Z, Pei X, Ma R. In vivo and in vitro characteristic of HIF-1α and relative genes in ischemic femoral head necrosis. Int J Clin Exp Pathol 2015; 8:7210-7216. [PMID: 26261616 PMCID: PMC4525950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 05/29/2015] [Indexed: 06/04/2023]
Abstract
BACKGROUND Legg-Calvé-Perthes Disease (Perthes' disease) is a childhood hip disorder initiated by ischemic necrosis of the growing femoral head. So far, the etiology and pathogenesis of Perthes' disease is poorly understood. MATERIALS AND METHODS Avascular osteonecrosis rat model was established to mimic the pathophysiological changes of femoral head necrosis. The chondrocytes of newborn Sprague-Dawley rats were isolated and cultured in hypoxic and normoxic condition. The expression characteristic of the hypoxia-inducible factor-1 alpha (HIF-1α) was evaluated both in vivo and in vitro models. Vascular endothelial growth factor (VEGF) and apoptotic genes in chondrocytes treated with normoxia and hypoxia were also studied. RESULTS HIF-1α expression increased greatly after ischemic operation and kept at relative high level in the arthromeningitis stage and declined in the stages of osteonecrosis and reconstruction. The HIF-1α mRNA levels of chondrocytes incubated at hypoxia were significantly higher than the cells treated with normoxia at 24 and 72 hours. Hypoxia inhibited VEGF expression; chondrocytes could oppose this inhibition manifested by the increasing of VEGF mRNA level after 72 hours hypoxia. The expression of apoptotic genes, Casp3, Casp8 and Casp9, elevated in chondrocytes after hypoxia with time differences. CONCLUSION Hypoxia might be an etiological factor for femoral head necrosis, HIF-1α, VEGF as well as apoptotic genes participated the pathophysiological process of ischemic osteonecrosis.
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Affiliation(s)
- Wanglin Zhang
- Department of Pediatric Orthopaedics, Children's Hospital of Fudan University 399 Wanyuan Road, Minhang District, Shanghai 201102, China
| | - Zhe Yuan
- Department of Pediatric Orthopaedics, Children's Hospital of Fudan University 399 Wanyuan Road, Minhang District, Shanghai 201102, China
| | - Xinhong Pei
- Department of Pediatric Orthopaedics, Children's Hospital of Fudan University 399 Wanyuan Road, Minhang District, Shanghai 201102, China
| | - Ruixue Ma
- Department of Pediatric Orthopaedics, Children's Hospital of Fudan University 399 Wanyuan Road, Minhang District, Shanghai 201102, China
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Liang J, Zhang Z, Liang L, Shen Y, Ouyang K. HIF-1α regulated tongue squamous cell carcinoma cell growth via regulating VEGF expression in a xenograft model. Ann Transl Med 2014; 2:92. [PMID: 25405167 DOI: 10.3978/j.issn.2305-5839.2014.08.01] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Accepted: 07/21/2014] [Indexed: 11/14/2022]
Abstract
OBJECTIVE We aimed to study the mechanism of hypoxia-inducible factor 1 alpha (HIF-1α) regulating the cell proliferation of tongue squamous cell carcinoma (TSCC) via vascular endothelial growth factor (VEGF). METHODS We used RNA interference (RNAi) technique, transfected chemically synthesized siRNA against HIF-1α into CAL-27 cells, and detected the expression of HIF-1α and VEGF by real time-PCR and Western blotting in order to find out if HIF-1α regulated the expression of VEGF. A xenograft experiment was carried out to observe the role of HIF-1α on the tumor growth of tongue squamous cell carcinoma. RESULTS HIF-1α and VEGF mRNA expression was significantly downregulated 36 and 48 h after transfection (P<0.05); the protein expression of HIF-1α and VEGF was also significantly suppressed by siRNA against HIF-1α. Furthermore, intratumoraly injection of HIF-1α targeting siRNA suppressed tumor growth in nude mice. CONCLUSIONS HIF-1α regulated VEGF expression, and they may contribute to TSCC cell tumor growth.
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Affiliation(s)
- Jun Liang
- 1 Department of Oral and Maxillofacial Surgery, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai 519000, China ; 2 Department of Stomatology, The Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510655, China ; 3 Department of Stomatology, Shanghai Tenth People's Hospital, Shanghai 200072, China ; 4 Department of Oral and Maxillofacial Surgery, Stomatological Hospital of Guangzhou Medical College, Guangzhou 510140, China
| | - Zhaoqiang Zhang
- 1 Department of Oral and Maxillofacial Surgery, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai 519000, China ; 2 Department of Stomatology, The Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510655, China ; 3 Department of Stomatology, Shanghai Tenth People's Hospital, Shanghai 200072, China ; 4 Department of Oral and Maxillofacial Surgery, Stomatological Hospital of Guangzhou Medical College, Guangzhou 510140, China
| | - Lizhong Liang
- 1 Department of Oral and Maxillofacial Surgery, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai 519000, China ; 2 Department of Stomatology, The Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510655, China ; 3 Department of Stomatology, Shanghai Tenth People's Hospital, Shanghai 200072, China ; 4 Department of Oral and Maxillofacial Surgery, Stomatological Hospital of Guangzhou Medical College, Guangzhou 510140, China
| | - Yun Shen
- 1 Department of Oral and Maxillofacial Surgery, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai 519000, China ; 2 Department of Stomatology, The Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510655, China ; 3 Department of Stomatology, Shanghai Tenth People's Hospital, Shanghai 200072, China ; 4 Department of Oral and Maxillofacial Surgery, Stomatological Hospital of Guangzhou Medical College, Guangzhou 510140, China
| | - Kexiong Ouyang
- 1 Department of Oral and Maxillofacial Surgery, The Fifth Affiliated Hospital, Sun Yat-sen University, Zhuhai 519000, China ; 2 Department of Stomatology, The Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou 510655, China ; 3 Department of Stomatology, Shanghai Tenth People's Hospital, Shanghai 200072, China ; 4 Department of Oral and Maxillofacial Surgery, Stomatological Hospital of Guangzhou Medical College, Guangzhou 510140, China
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