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Otto S, Michler JK, Dhein S, Mülling CKW. Development of a constant pressure perfused ex vivo model of the equine larynx. PLoS One 2021; 16:e0251530. [PMID: 34014952 PMCID: PMC8136745 DOI: 10.1371/journal.pone.0251530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 04/27/2021] [Indexed: 11/28/2022] Open
Abstract
Distal axonopathy is seen in a broad range of species including equine patients. In horses, this degenerative disorder of the recurrent laryngeal nerve is described as recurrent laryngeal neuropathy (RLN). The dysfunctional innervation of the cricoarytenoideus dorsalis muscle (CAD) leads to a loss of performance in affected horses. In general, ex vivo models of the larynx are rare and for equine patients, just one short report is available. To allow for testing new therapy approaches in an isolated organ model, we examined equine larynges in a constant pressure perfused setup. In order to check the vitality and functionality of the isolated larynx, the vessels´ reaction to norepinephrine (NE) and sodium nitroprusside (NP) as vasoactive agents was tested. Additionally, the contractility of the CAD was checked via electrical stimulation. To determine the extent of hypoxic alterations, lactate dehydrogenase (LDH) and lactate were measured and an immunofluorescent analysis of hypoxia-inducible factor (HIF-1α), a key transcription factor in hypoxia, was performed. For this, a hypoxia-induced cell culture for HIF-1α was developed. The application of NE led to an expected vasoconstriction while NP caused the expected vasodilation. During a perfusion period of 352 ±20.78 min, LDH values were in the reference range and lactate values slightly exceeded the reference range at the end of the perfusion. HIF-1α nuclear translocation could reliably be detected in the hypoxia-induced cell cultures, but not in sections of the perfused CAD. With the approach presented here, a solid basis for perfusing equine larynges was established and may serve as a tool for further investigations of equine larynx disorders as well as a transferrable model for other species.
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Affiliation(s)
- Sven Otto
- Institute of Veterinary Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, Leipzig University, Germany
| | - Jule K. Michler
- Institute of Veterinary Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, Leipzig University, Germany
- * E-mail:
| | | | - Christoph K. W. Mülling
- Institute of Veterinary Anatomy, Histology and Embryology, Faculty of Veterinary Medicine, Leipzig University, Germany
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Børretzen A, Gravdal K, Haukaas SA, Mannelqvist M, Beisland C, Akslen LA, Halvorsen OJ. The epithelial-mesenchymal transition regulators Twist, Slug, and Snail are associated with aggressive tumour features and poor outcome in prostate cancer patients. J Pathol Clin Res 2021; 7:253-270. [PMID: 33605548 PMCID: PMC8073012 DOI: 10.1002/cjp2.202] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 12/22/2020] [Accepted: 01/08/2021] [Indexed: 12/17/2022]
Abstract
The prognostic importance of transcription factors promoting epithelial-mesenchymal transition (EMT) and angiogenesis has not been well explored in prostate cancer patients with long follow-up, nor the interplay between these factors. The objective of this study was to assess the individual protein expression and co-expression of Twist, Slug (Snai2), Snail (Snai1), and hypoxia-inducible factor-1 alpha (Hif-1α) in prostate cancer in relation to EMT, angiogenesis, hypoxia, tumour features, disease recurrence, and patient survival. Immunohistochemical staining was performed on tissue microarray sections from 338 radical prostatectomies with long follow-up. In addition, 41 cases of prostatic hyperplasia, 33 non-skeletal metastases, 13 skeletal metastases, and 33 castration-resistant prostate carcinomas were included. Our findings were validated in external gene expression data sets. Twist was overexpressed in primary prostate cancer and markedly reduced in distant metastases (p < 0.0005). Strong expression of Twist and Slug was associated with Hif-1α in localised prostate cancer (p ≤ 0.001), and strong Twist was associated with Hif-1α in castration-resistant carcinomas (p = 0.044). Twist, Slug, and increased Snail at the tumour stromal border were associated with vascular factors (p ≤ 0.045). Each of the three EMT-regulating transcription factors were associated with aggressive tumour features and shorter time to recurrence and cancer-specific death. Notably, the co-expression of factors demonstrated an enhanced influence on outcome. In the subgroup of E-cadherinlow carcinomas, strong Slug was associated with shorter time to all end points and was an independent predictor of time to multiple end points, including cancer-specific death (hazard ratio 3.0, p = 0.041). To conclude, we demonstrate an important relation between EMT, hypoxia, and angiogenesis and a strong link between the investigated EMT regulators and aggressive tumour features and poor patient outcome in prostate cancer. Despite the retrospective nature of this long-term study, our findings could have a significant impact on the future treatment of prostate cancer, where tailored therapies might be directed simultaneously against epithelial-mesenchymal phenotypes, angiogenesis, and tumour hypoxia.
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Affiliation(s)
- Astrid Børretzen
- Centre for Cancer Biomarkers CCBIO, Gade Laboratory for Pathology, Department of Clinical MedicineUniversity of BergenBergenNorway
- Department of PathologyHaukeland University HospitalBergenNorway
| | - Karsten Gravdal
- Department of PathologyHaukeland University HospitalBergenNorway
| | - Svein A Haukaas
- Department of Clinical MedicineUniversity of BergenBergenNorway
- Department of UrologyHaukeland University HospitalBergenNorway
| | - Monica Mannelqvist
- Centre for Cancer Biomarkers CCBIO, Gade Laboratory for Pathology, Department of Clinical MedicineUniversity of BergenBergenNorway
| | - Christian Beisland
- Department of Clinical MedicineUniversity of BergenBergenNorway
- Department of UrologyHaukeland University HospitalBergenNorway
| | - Lars A Akslen
- Centre for Cancer Biomarkers CCBIO, Gade Laboratory for Pathology, Department of Clinical MedicineUniversity of BergenBergenNorway
- Department of PathologyHaukeland University HospitalBergenNorway
| | - Ole J Halvorsen
- Centre for Cancer Biomarkers CCBIO, Gade Laboratory for Pathology, Department of Clinical MedicineUniversity of BergenBergenNorway
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JUSMAN SRIWIDIAA, SARI DEWIHAMBAR, NINGSIH SRISUCIATI, HARDIANY NOVISILVIA, SADIKIN MOHAMAD. Role of Hypoxia Inducible Factor-1 Alpha (HIF-1α) in Cytoglobin Expression and Fibroblast Proliferation of Keloids. Kobe J Med Sci 2019; 65:E10-E18. [PMID: 31341152 PMCID: PMC6668593] [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: 12/13/2018] [Accepted: 03/01/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Keloids are characterized by an overabundance of collagen deposition due to elevated activity and proliferation of fibroblasts, which lead to hypoxic conditions. Adaptation to these conditions is regulated by the transcription factor hypoxia inducible factor-1α (HIF-1α). Cytoglobin (Cygb), a reactive oxygen species scavenger, is a target gene of HIF-1α. In our previous study, we showed that Cygb expression in keloid tissue was correlated with HIF-1α expression. However, whether HIF-1α regulates Cygb expression and the proliferation of keloid fibroblasts remained unclear. Therefore, this study aimed to determine the role of HIF-1α in Cygb expression and fibroblast proliferation of keloids. METHODS This was an in vitro study using a primary culture of keloid fibroblasts in which ibuprofen was used to inhibit HIF-1α expression. The expression of HIF-1α and Cygb mRNA were analyzed using quantitative reverse transcriptase polymerase chain reaction (qRT-PCR) methods, and their protein levels were analyzed using an enzyme-linked immunosorbent assay (ELISA). Fibroblast proliferation was analyzed using a Trypan blue exclusion assay. RESULTS Inhibition of HIF-1α by ibuprofen decreased Cygb mRNA expression but not in all the samples, followed by a decrease in the protein level of Cygb. There was a positive correlation between the HIF-1α protein and Cygb mRNA, probably due to the regulation of Cygb by HIF-1α at the mRNA level, but not the protein level. The proliferation of keloid fibroblasts was significantly decreased and positively correlated with the HIF-1α protein. CONCLUSION HIF-1α regulates Cygb expression and fibroblast proliferation in keloids.
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Affiliation(s)
- SRI WIDIA A. JUSMAN
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, Universitas Indonesia
- Center of Hypoxia and Oxidative Stress Studies, Faculty of Medicine Universitas Indonesia
| | - DEWI HAMBAR SARI
- Master Program of Biomedical Sciences, Faculty of Medicine, Universitas Indonesia
| | - SRI SUCIATI NINGSIH
- Master Program of Biomedical Sciences, Faculty of Medicine, Universitas Indonesia
| | - NOVI SILVIA HARDIANY
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, Universitas Indonesia
- Center of Hypoxia and Oxidative Stress Studies, Faculty of Medicine Universitas Indonesia
| | - MOHAMAD SADIKIN
- Department of Biochemistry and Molecular Biology, Faculty of Medicine, Universitas Indonesia
- Center of Hypoxia and Oxidative Stress Studies, Faculty of Medicine Universitas Indonesia
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Park MK, Ko EJ, Jeon KY, Kim H, Jo JO, Baek KW, Kang YJ, Choi YH, Hong Y, Ock MS, Cha HJ. Induction of Angiogenesis by Malarial Infection through Hypoxia Dependent Manner. Korean J Parasitol 2019; 57:117-125. [PMID: 31104403 PMCID: PMC6526210 DOI: 10.3347/kjp.2019.57.2.117] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/22/2018] [Revised: 03/12/2019] [Accepted: 03/14/2019] [Indexed: 11/23/2022]
Abstract
Malarial infection induces tissue hypoxia in the host through destruction of red blood cells. Tissue hypoxia in malarial infection may increase the activity of HIF1α through an intracellular oxygen-sensing pathway. Activation of HIF1α may also induce vascular endothelial growth factor (VEGF) to trigger angiogenesis. To investigate whether malarial infection actually generates hypoxia-induced angiogenesis, we analyzed severity of hypoxia, the expression of hypoxia-related angiogenic factors, and numbers of blood vessels in various tissues infected with Plasmodium berghei. Infection in mice was performed by intraperitoneal injection of 2×106 parasitized red blood cells. After infection, we studied parasitemia and survival. We analyzed hypoxia, numbers of blood vessels, and expression of hypoxia-related angiogenic factors including VEGF and HIF1α. We used Western blot, immunofluorescence, and immunohistochemistry to analyze various tissues from Plasmodium berghei-infected mice. In malaria-infected mice, parasitemia was increased over the duration of infection and directly associated with mortality rate. Expression of VEGF and HIF1α increased with the parasitemia in various tissues. Additionally, numbers of blood vessels significantly increased in each tissue type of the malaria-infected group compared to the uninfected control group. These results suggest that malarial infection in mice activates hypoxia-induced angiogenesis by stimulation of HIF1α and VEGF in various tissues.
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Affiliation(s)
- Mi-Kyung Park
- Department of Parasitology and Genetics, Kosin University College of Medicine, Busan 49267, Korea
| | - Eun-Ji Ko
- Department of Parasitology and Genetics, Kosin University College of Medicine, Busan 49267, Korea
- Department of Biological Science, Pusan National University, Busan 46241, Korea
| | - Kyung-Yoon Jeon
- Department of Parasitology and Genetics, Kosin University College of Medicine, Busan 49267, Korea
| | - Hyunsu Kim
- Department of Parasitology and Genetics, Kosin University College of Medicine, Busan 49267, Korea
- Department of Biological Science, Pusan National University, Busan 46241, Korea
| | - Jin-Ok Jo
- Department of Parasitology and Genetics, Kosin University College of Medicine, Busan 49267, Korea
| | - Kyung-Wan Baek
- Department of Parasitology, College of Medicine, Pusan National University, Busan 50612, Korea
| | - Yun-Jeong Kang
- Department of Parasitology and Genetics, Kosin University College of Medicine, Busan 49267, Korea
| | - Yung Hyun Choi
- Anti-Aging Research Center and Department of Biochemistry, Dongeui University College of Korean Medicine, Busan 47227, Korea
| | - Yeonchul Hong
- Department of Parasitology and Tropical Medicine, Kyungpook National University School of Medicine, Daegu 41944, Korea
| | - Mee Sun Ock
- Department of Parasitology and Genetics, Kosin University College of Medicine, Busan 49267, Korea
| | - Hee-Jae Cha
- Department of Parasitology and Genetics, Kosin University College of Medicine, Busan 49267, Korea
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Zhao H, Zhao Y, Li X, Xu L, Jiang F, Hou W, Dong L, Cao J. Effects of Antioxidant Tempol on Systematic Inflammation and Endothelial Apoptosis in Emphysematous Rats Exposed to Intermittent Hypoxia. Yonsei Med J 2018; 59:1079-1087. [PMID: 30328323 PMCID: PMC6192890 DOI: 10.3349/ymj.2018.59.9.1079] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 08/22/2018] [Accepted: 08/23/2018] [Indexed: 12/22/2022] Open
Abstract
PURPOSE Obstructive sleep apnea and chronic obstructive pulmonary disease are independent risk factors of cardiovascular disease (CVD), and their coexistence is known as overlap syndrome (OS). Endothelial dysfunction is the initial stage of CVD; however, underlying mechanisms linking OS and CVD are not well understood. The aim of this study was to explore whether OS can lead to more severe inflammation and endothelial apoptosis by promoting endothelial dysfunction, and to assess the intervention effects of antioxidant tempol. MATERIALS AND METHODS Male Wistar rats (n=66) were exposed to normal oxygen [normal control (NC) group], intermittent hypoxia (IH group), cigarette smoke (CH group), as well as cigarette smoke and IH (OS group). Tempol intervention was assessed in OS group treated with tempol (OST group) or NaCl (OSN group). After an 8-week challenge, lung tissues, serum, and fresh blood were harvested for analysis of endothelial markers and apoptosis. RESULTS The levels of intracellular adhesion molecule-1, vascular cellular adhesion molecule-1, and apoptosis in circulating epithelial cells were the highest in OS group and the lowest in NC group. These levels were all greater in IH group than in CH group, and were lower in OST group than in OS and OSN groups (all p<0.001). CONCLUSION Synergistic effects of IH with cigarette smoke-induced emphysema produce a greater inflammatory status and endothelial apoptosis. OS-related inflammation and endothelial cell apoptosis may play important roles in promoting cardiovascular dysfunction, and antioxidant tempol could achieve a partial protective effect.
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Affiliation(s)
- Haiyan Zhao
- Respiratory Department of Tianjin Medical University General Hospital, Tianjin, China
| | - Yaping Zhao
- Respiratory Department of Tianjin Medical University General Hospital Airport Hospital, Tianjin, China
| | - Xin Li
- Respiratory Department of Tianjin Medical University General Hospital, Tianjin, China
| | - Leiqian Xu
- Respiratory Department of Tianjin Medical University General Hospital, Tianjin, China
| | - Fangxin Jiang
- Department of Life Sciences, State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin, China
| | - Wanju Hou
- Respiratory Department of Tianjin Medical University General Hospital, Tianjin, China
| | - Lixia Dong
- Respiratory Department of Tianjin Medical University General Hospital, Tianjin, China.
| | - Jie Cao
- Respiratory Department of Tianjin Medical University General Hospital, Tianjin, China.
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Fais P, Mazzotti MC, Teti G, Boscolo‐Berto R, Pelotti S, Falconi M. HIF1α protein and mRNA expression as a new marker for post mortem interval estimation in human gingival tissue. J Anat 2018; 232:1031-1037. [PMID: 29504141 PMCID: PMC5980163 DOI: 10.1111/joa.12800] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/02/2018] [Indexed: 12/20/2022] Open
Abstract
Estimating the post mortem interval (PMI) is still a crucial step in Forensic Pathology. Although several methods are available for assessing the PMI, a precise estimation is still quite unreliable and can be inaccurate. The present study aimed to investigate the immunohistochemical distribution and mRNA expression of hypoxia inducible factor (HIF-1α) in post mortem gingival tissues to establish a correlation between the presence of HIF-1α and the time since death, with the final goal of achieving a more accurate PMI estimation. Samples of gingival tissues were obtained from 10 cadavers at different PMIs (1-3 days, 4-5 days and 8-9 days), and were processed for immunohistochemistry and quantitative reverse transcription-polymerase chain reaction. The results showed a time-dependent correlation of HIF-1α protein and its mRNA with different times since death, which suggests that HIF-1α is a potential marker for PMI estimation. The results showed a high HIF-1α protein signal that was mainly localized in the stratum basale of the oral mucosa in samples collected at a short PMI (1-3 days). It gradually decreased in samples collected at a medium PMI (4-5 days), but it was not detected in samples collected at a long PMI (8-9 days). These results are in agreement with the mRNA data. These data indicate an interesting potential utility of Forensic Anatomy-based techniques, such as immunohistochemistry, as important complementary tools to be used in forensic investigations.
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Affiliation(s)
- Paolo Fais
- Department of Medical and Surgical SciencesSection of Legal MedicineUniversity of BolognaBolognaItaly
| | - Maria Carla Mazzotti
- Department of Medical and Surgical SciencesSection of Legal MedicineUniversity of BolognaBolognaItaly
| | - Gabriella Teti
- Department of Biomedical and Neuromotor SciencesSection of AnatomyUniversity of BolognaBolognaItaly
| | - Rafael Boscolo‐Berto
- Department of Cardiac, Thoracic and Vascular SciencesSection of Legal MedicineUniversity Hospital of PadovaPadovaItaly
| | - Susi Pelotti
- Department of Medical and Surgical SciencesSection of Legal MedicineUniversity of BolognaBolognaItaly
| | - Mirella Falconi
- Department of Biomedical and Neuromotor SciencesSection of AnatomyUniversity of BolognaBolognaItaly
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Lee LT, Wong YK, Chan MY, Chang KW, Chen SC, Chang CT, Wang J. The correlation between HIF-1 alpha and VEGF in oral squamous cell carcinomas: Expression patterns and quantitative immunohistochemical analysis. J Chin Med Assoc 2018; 81:370-375. [PMID: 29289482 DOI: 10.1016/j.jcma.2017.06.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2017] [Revised: 06/06/2017] [Accepted: 06/07/2017] [Indexed: 10/18/2022] Open
Abstract
BACKGROUND The prognostic predict biomarkers are important in oral squamous cell carcinoma (OSCC). We investigated the expression patterns and quantitation of hypoxia-inducible factor-1 alpha (HIF-1α) and vascular endothelial growth factor (VEGF) in OSCC patients. Among OSCC patients with recurrence and metastasis, the expression percentages of HIF-1α and VEGF also were analyzed. METHODS Thirty-eight patients (8 hyperkeratosis, 30 oral squamous cell carcinoma) were included in this study. In the follow-up period, 5 OSCC patients had metastasis and 12 OSCC patients had local recurrence. We used computer-assisted image processing to analyze immunohistochemistry (IHC). The quantitative analysis of IHC slides, including upper-layer epithelium (U) and lower-layer epithelium (L), was calculated. RESULTS We found homogeneous expression of VEGF in the epithelium. However, two patterns of HIF-1α expression were observed: homogeneous and heterogeneous. The highest U + L layer percentage in HIF-1α and VEF expression had significant association in tumor metastasis and recurrence (p<0.001 in HIF-1α and p<0.001 in VEGF). U + L layer HIF-1α expression percentage was >156.4%, and the survival rate was poor (p < 0.001). CONCLUSION HIF-1α expression was not only influenced by tumor hypoxia, it also reflected tumor cell characteristics. High concentrations of VEGF and HIF-1α may have value as prognostic markers of tumor metastasis and recurrence.
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Affiliation(s)
- Li-Tzu Lee
- Department of Oral and Maxillofacial Surgery, Taichung Veterans General Hospital, Taichung, Taiwan, ROC; Department of Dentistry, School of Dentistry, National Yang-Ming University, Taipei, Taiwan, ROC
| | - Yong-Kie Wong
- Department of Dentistry, School of Dentistry, National Yang-Ming University, Taipei, Taiwan, ROC; Oral and Maxillofacial Surgery, and Department of Dentistry, Chang Bing Show Chan Memorial Hospital, Changhwa, Taiwan, ROC.
| | - Man-Yee Chan
- Department of Oral and Maxillofacial Surgery, Taichung Veterans General Hospital, Taichung, Taiwan, ROC; School of Dentistry, Chung Shan Medical University, Taichung, Taiwan, ROC
| | - Kuo-Wei Chang
- Department of Dentistry, School of Dentistry, National Yang-Ming University, Taipei, Taiwan, ROC
| | - Shyh-Chang Chen
- Department of Pathology and Medical Laboratory, Taichung Veterans General Hospital, Taichung, Taiwan, ROC
| | - Chiou-Tuz Chang
- Department of Oral and Maxillofacial Surgery, Taichung Veterans General Hospital, Taichung, Taiwan, ROC
| | - John Wang
- Department of Pathology, China Medical University Hospital, Taichung, Taiwan, ROC
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Shrivastava R, Singh V, Asif M, Negi MPS, Bhadauria S. Oncostatin M upregulates HIF-1α in breast tumor associated macrophages independent of intracellular oxygen concentration. Life Sci 2017; 194:59-66. [PMID: 29246543 DOI: 10.1016/j.lfs.2017.12.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [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: 07/31/2017] [Revised: 11/29/2017] [Accepted: 12/11/2017] [Indexed: 12/12/2022]
Abstract
AIMS HIF is an important transcription-regulator for adaptation to cellular stress in cells of myeloid origin. Classically, expression and activity of HIF1-α is regulated by oxygen-concentration within cell. However, there exists an alternative regulatory mechanism affecting HIF1-α levels independent of oxygen concentration particularly in inflammatory cells like macrophages. Here we report the mechanism of HIF1-α upregulation in TAMs by Oncostatin-M (OSM) independent of cellular oxygen concentration. MAIN METHODS THP-1 derived macrophages were treated with OSM. HIF1-α levels and interaction with pVHL were evaluated via immunoblot-analysis and Co-immunoprecipitation. Translocation of HIF1-α to nucleus was visualized using confocal-microscopy. Fold change in mRNA levels of ARG-1 and COX-2 was analyzed using RT-PCR. KEY FINDINGS Current study demonstrates that OSM treatment to TAMs led to an increased expression of HIF1-α under normoxic conditions via activation of mTORC2. This HIF1-α upregulation was dependent on both de novo synthesis of HIF1-α and its enhanced stability due to disruption of its binding to pVHL. Furthermore, we evaluated that OSM not only enhances the expression of HIF1-α but also increases its localization to nucleus where it acts as a transcription factor regulating expression of genes like ARG-1 and COX-2. SIGNIFICANCE Inflammation is a critical hallmark of cancer as tumor microenvironment is largely infiltrated with macrophages. These tumor associated macrophages (TAMs) display a M2 skewed phenotype. Many target genes of TAMs are HIF1-α responsive. These TAMs are involved in tumor progression, metastasis and angiogenesis. Targeting of HIF1-α/OSM can lead to devising of better therapeutic strategy against cancer.
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Affiliation(s)
- Richa Shrivastava
- Division of Toxicology and Experimental Medicine, Central Drug Research Institute, (CSIR), Lucknow, Uttar Pradesh 226031, India; Academy of Scientific and Innovative Research, (AcSIR), New Delhi 110025, India
| | - Varsha Singh
- Division of Toxicology and Experimental Medicine, Central Drug Research Institute, (CSIR), Lucknow, Uttar Pradesh 226031, India
| | - Mohammad Asif
- Division of Toxicology and Experimental Medicine, Central Drug Research Institute, (CSIR), Lucknow, Uttar Pradesh 226031, India
| | - Mahendra Pal Singh Negi
- Division of Toxicology and Experimental Medicine, Central Drug Research Institute, (CSIR), Lucknow, Uttar Pradesh 226031, India
| | - Smrati Bhadauria
- Division of Toxicology and Experimental Medicine, Central Drug Research Institute, (CSIR), Lucknow, Uttar Pradesh 226031, India; Academy of Scientific and Innovative Research, (AcSIR), New Delhi 110025, India.
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Mo ZT, Li WN, Zhai YR, Gao SY. The effects of icariin on the expression of HIF-1α, HSP-60 and HSP-70 in PC12 cells suffered from oxygen-glucose deprivation-induced injury. Pharm Biol 2017; 55:848-852. [PMID: 28140748 PMCID: PMC6130580 DOI: 10.1080/13880209.2017.1281968] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Revised: 10/22/2016] [Accepted: 01/10/2017] [Indexed: 06/06/2023]
Abstract
CONTEXT The effects of icariin, a chief constituent of flavonoids from Epimedium brevicornum Maxim (Berberidaceae), on the levels of HIF-1α, HSP-60 and HSP-70 remain unknown. OBJECTIVE To explore the effects of icariin on the levels of HSP-60, HIF-1α and HSP-70 neuron-specific enolase (NSE) and cell viability. MATERIALS AND METHODS PC12 cells were treated with icariin (10-7, 10-6 or 10-5 mol/L) for 3 h (1 h before oxygen-glucose deprivation (OGD) plus 2 h OGD). HSP-60, HIF-1α, HSP-70 and NSE were measured using enzyme-linked immunosorbent assay (ELISA). Cell viability was determined by metabolic 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. RESULTS After 2 h OGD, levels of HIF-1α, HSP-60, HSP-70 and NSE were increased significantly (HIF-1α: 33.3 ± 1.9 ng/L, HSP-60: 199 ± 16 ng/L, HSP-70: 195 ± 17 ng/L, NSE: 1487 ± 125 ng/L), and cell viability was significantly decreased (0.26 ± 0.03), while icariin (10-7, 10-6, or 10-5 mol/L) significantly reduced the contents of HIF-1α, HSP-60, HSP-70 and NSE (HIF-1α: 14.1 ± 1.4, 22.6 ± 1.8, 15.7 ± 2.1, HSP-60: 100 ± 12, 89 ± 6, 113 ± 11, HSP-70: 139 ± 9, 118 ± 7, 95 ± 9 and NSE: 1121 ± 80, 1019 ± 52, 731 ± 88), and improved cell viability (0.36 ± 0.03, 0.38 ± 0.04, 0.37 ± 0.03) in OGD-treated PC12 cells. DISCUSSION AND CONCLUSION These results indicate that the protective mechanisms of icariin against OGD-induced injury may be related to down-regulating the expression of HIF-1α, HSP-60 and HSP-70.
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Affiliation(s)
- Zhen-Tao Mo
- Department of Pharmacology of Zhuhai Campus, Zunyi Medical University, Zhuhai, Guangdong, China
| | - Wen-Na Li
- Department of Pharmacology of Zhuhai Campus, Zunyi Medical University, Zhuhai, Guangdong, China
| | - Yu-Rong Zhai
- Department of Pharmacology of Zhuhai Campus, Zunyi Medical University, Zhuhai, Guangdong, China
| | - Shu-Ying Gao
- Department of Pharmacology of Zhuhai Campus, Zunyi Medical University, Zhuhai, Guangdong, China
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Mu QJ, Zhao YH, Cheng DD, Wang HY, Chen LF, Zhao YS, Wang XL. [Effects of bone marrow mesenchymal stem cell transplantation on retinal neovascularization in neonatal rats with oxygen-induced retinopathy]. Zhongguo Dang Dai Er Ke Za Zhi 2017; 19:1202-1207. [PMID: 29132470 PMCID: PMC7389327] [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: 08/01/2017] [Accepted: 09/11/2017] [Indexed: 11/12/2023]
Abstract
OBJECTIVE To explore the effects of rat bone mesenchymal stem cell (BMSC) transplantation on retinal neovascularization, and to observe the changes of hypoxia-inducible factor-1 alpha (HIF-1α) and vascular endothelial growth factors (VEGF) in rats with oxygen-induced retinopathy (OIR). METHODS Seventy-two seven-day-old Sprague-Dawley rats were randomly divided into three groups: normal control (CON), model (OIR) and BMSC transplantation. In the BMSC transplantation group, BMSCs were transplanted 5 days after oxygen conditioning. The phosphate buffered saline of the same volume was injected in the CON and OIR groups. The OIR model was prerpared according to the classic hyperoxygen method. At seven days after transplantation, retinal neovascularization was examined by retinal flat-mount staining and hematoxylin eosin (HE) staining. The expression of HIF-1α and VEGF proteins was examined by immunohistochemistry staining and Western blot analysis. RESULTS The retinal flat-mount staining results showed that the vessels were well organized in the CON group, but the vessels were irregularly organized, and lots of nonperfusion areas were observed in the OIR group. The large vessels were a bit circuitous, the retinal vessels were relatively organized, and less nonperfusion areas were noted in the BMSC transplantation group. The HE staining results showed that many neovessels and preretinal neovascular (pre-RNC) cells were observed on the internal limiting membrane in the OIR group. There were less pre-RNC cells in the BMSC transplantation group compared with the OIR group (P<0.01). The immunohistochemistry analysis showed that more HIF-1α+ and VEGF+ cells were observed in the OIR group compared with the CON group, and less HIF-1α+ and VEGF+ cells were observed in the BMSC transplantation group compared with OIR group (P<0.05). The Western blot analysis showed the expression of HIF-1α and VEGF proteins in the OIR group was significantly higher than that in the CON group. The expression of HIF-1α and VEGF proteins in the BMSC transplantation group was lower than that in the OIR group (P<0.01). CONCLUSIONS BMSC transplantation therapy could alleviate retinal neovascularization in OIR rats, and its mechanisms might be associated with the inhibition of the expression of HIF-1α and VEGF proteins.
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Affiliation(s)
- Qing-Jie Mu
- Clinical Institute, Weifang Medical University, Weifang, Shandong 261053, China.
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11
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Abstract
BACKGROUND Hypoxia-induced factors (HIF) has a role in angiogenesis and regulate tumorigenesis of cancer cell. The HIF is the best-identified mechanism that shows imbalance between consumption and oxygen supply in progressing tumor. This study of HIF-2α expression in oral squamous cell carcinoma (OSCC) aimed to investigate the relationship of HIF-2α and pathology characteristics related to its clinical correlation. METHODS Fifty-eight samples of OSCC and adjacent tissues were fixed in paraffin for microarray preparation. The tissue array then was stained using primary antibody HIF-2α (NB100-122) and autoprobe II ABC universal staining kit. Each tissue sample was captured using camera microscope, and images were analyzed with Photoshop 6.0 using the CMYK method. A statistical analysis was performed with the two-tailed t-test, Kaplan-Meier and log-rank test using Prism for Windows version 5.0. RESULTS The samples of the non-cancerous matched tissues (NCMTs) paired with their OSCC samples showed HIF-2α overexpression with significance difference p < 0.0001. Although no significant difference was found between HIF-2α expression and overall survival rate, cancer-specific survival rate, and disease-free survival rate, the HIF-2α expression showed statistical significance for overall cancer stages with p = 0.013. In addition, patients with high HIF-2α expression tended to develop recurrence within 2 years compared to the low expression group. CONCLUSION HIF-2 expression has complicated roles in different cancer types, including OSCC. Our study indicated that HIF-2α overexpression can serve as a good biomarker for cancer status for all tumor stages and may predict an early recurrence within two years.
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Affiliation(s)
- Elva Lim
- Department of Dentistry, National Yang-Ming University, Taipei, Taiwan, ROC
| | - Chia-Chun Kuo
- Department of Stomatology, Taipei Veterans General Hospital, Taipei, Taiwan, ROC
| | - Hsi-Feng Tu
- Department of Dentistry, National Yang-Ming University, Taipei, Taiwan, ROC
| | - Cheng-Chieh Yang
- Department of Dentistry, National Yang-Ming University, Taipei, Taiwan, ROC; Department of Stomatology, Taipei Veterans General Hospital, Taipei, Taiwan, ROC.
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Cai C, Wang J, Zhong Z, Dai Z, Wang Q, Dong W, Shi H, Liu Q, DU J. [Hypoxia-inducible factor-1α and CD133 predicts pathological complete response and survival for locally advanced rectal cancer patients after neoadjuvant chemoradiotherapy]. Zhejiang Da Xue Xue Bao Yi Xue Ban 2017; 46:36-43. [PMID: 28436629 PMCID: PMC10396905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Objective: To investigate the expression of hypoxia-inducible factor 1α (HIF-1α) and CD133 in predicting pathologic remission and survival of patients with locally advanced rectal cancer undergoing neoadjuvant chemoradiotherapy. Methods: One hundred and fourteen patients with locally advanced rectal cancer undergoing neoadjuvant chemoradiotherapy from January 2010 to December 2015 in Jinhua Municipal Central Hospital were enrolled in the study. RT-PCR and immunohistochemistry methods were used to detect the mRNA and protein expression of HIF-1α and CD133 before and after chemoradiotherapy. Spearman rank correlation was used to analyze the correlation between HIF-1α and CD133 mRNA expression. Univariate and logistic multivariate analyses were used to determine the factors related to pathological complete response (pCR). Logistic regression analysis and Cox's proportional hazard model were used to determine factors related to overall survival and recurrence-free survival. Results: The expression of HIF-1α and CD133 mRNA was correlated with pT, ypTNM, pCR, recurrence and metastasis of rectal cancer, while not correlated with sex, age and BMI of patients. HIF-1α mRNA expression was positively correlated with CD133 mRNA expression ( α=0.579, P=0.000). Immunohistochemistry analysis showed that residual cancer cells strongly expressing HIF-1α also expressed CD133 strongly. Univariate analysis showed that HIF-1α mRNA and CD133 mRNA were significantly correlated with pCR ( P=0.001, P=0.022, respectively). Multivariate analysis showed that HIF-1α and CD133 mRNA expression were independent prognostic factors of pCR ( P=0.012, P=0.047, respectively). Cox regression analysis showed that the expression of HIF-1α mRNA and CD133 mRNA were independent predictors of recurrence-free survival and overall survival ( P=0.025, P=0.033, respectively). Conclusion: The study indicates that HIF-1α and CD133 can predict pathological complete remission and survival of patients with locally advanced rectal cancer.
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Affiliation(s)
- Cheng Cai
- Department of Colorectal and Anal Surgery, Jinhua Municipal Central Hospital, Jinhua 321000, China
| | - Jianping Wang
- Department of Colorectal and Anal Surgery, Jinhua Municipal Central Hospital, Jinhua 321000, China
| | - Zhifeng Zhong
- Department of Colorectal and Anal Surgery, Jinhua Municipal Central Hospital, Jinhua 321000, China
| | - Zhihui Dai
- Department of Colorectal and Anal Surgery, Jinhua Municipal Central Hospital, Jinhua 321000, China
| | - Qinghua Wang
- Department of Colorectal and Anal Surgery, Jinhua Municipal Central Hospital, Jinhua 321000, China
| | - Wuzhen Dong
- Department of Colorectal and Anal Surgery, Jinhua Municipal Central Hospital, Jinhua 321000, China
| | - Hongqi Shi
- Department of Pathology, Jinhua Municipal Central Hospital, Zhejiang University, Jinhua 321000, China
| | - Qingwei Liu
- Department of Pathology, Jinhua Municipal Central Hospital, Zhejiang University, Jinhua 321000, China
| | - Jinlin DU
- Department of Colorectal and Anal Surgery, Jinhua Municipal Central Hospital, Jinhua 321000, China.
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Elberson VD, Nielsen LC, Wang H, Kumar HSV. Effects of intermittent hypoxia and hyperoxia on angiogenesis and lung development in newborn mice. J Neonatal Perinatal Med 2016; 8:313-22. [PMID: 26836820 DOI: 10.3233/npm-15814134] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND Premature birth disrupts hypoxia driven microvascular development that directs alveolar and lung growth. Changes in oxygen exposure after birth can perturb the regulation of angiogenesis leading to bronchopulmonary dysplasia (BPD). We studied the effects of intermittent hypoxia or hyperoxia on HIF and angiogenic gene expression and lung development in newborn mice. METHODS Newborn litters were randomized within 12 h of birth to 12% O2 (4 h), 50% O2 (4 h) or 12% O2 (2 h)/50% O2 (2 h) followed by room air (RA) recovery for 20 h. Mice in RA were the control group. The mice were exposed to 6 such cycles (D1-D6) and sacrifice on D7. Whole lung mRNA was isolated and gene expression performed by qRT-PCR (HIF1α/2α/1β; PHD2, Ang1, Tie2, Vegf, VegfR1 & VegfR2) and analyzed by PCR array data analysis web portal. HIF-1α, prolyl hydroxylase-2 and VEGF protein were analyzed in whole lung by ELISA. Lung morphology was assessed by H&E sections and radial alveolar counts; cell proliferation by Ki67 immunostaining. RESULTS HIF-1α mRNA and VEGF protein were significantly downregulated in the 50% O2 group; VEGF mRNA and protein were significantly downregulated in the 12% O2-50% O2 group; Ang-1 and its receptor mRNA expression were downregulated in 12% O2 and 12% O2-50% O2 groups. 50% O2 (hyperoxia) and 12% O2-50% O2 (hypoxia-hyperoxia) groups demonstrated alveolar simplification by RAC and the same groups had decreased cell proliferation by Ki67 staining compared to RA and hypoxia (12% O2) groups. CONCLUSIONS Downregulation of HIF and angiogenic gene expression with associated changes in lung histology following intermittent hypoxia-hyperoxia is likely an important contributing factor in the development of BPD.
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Gao JL, Shui YM, Jiang W, Huang EY, Shou QY, Ji X, He BC, Lv GY, He TC. Hypoxia pathway and hypoxia-mediated extensive extramedullary hematopoiesis are involved in ursolic acid's anti-metastatic effect in 4T1 tumor bearing mice. Oncotarget 2016; 7:71802-71816. [PMID: 27708244 PMCID: PMC5342124 DOI: 10.18632/oncotarget.12375] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Accepted: 09/24/2016] [Indexed: 01/13/2023] Open
Abstract
Hypoxic in the tumor mass is leading to the myeloproliferative-like disease (leukemoid reaction) and anemia of body, which characterized by strong extensive extramedullary hematopoiesis (EMH) in spleen. As the key transcription factor of hypoxia, hypoxia-inducible factor-1 (HIF-1) activates the expression of genes essential for EMH processes including enhanced blood cell production and angiogenesis. We found ursolic acid (UA), a natural pentacyclic triterpenoid carboxylic acid, inhibited growth of breast cancer both in vivo and in vitro. The suppression was mediated through the inhibition of multiple cell pathways linked to inflammation, proliferation, angiogenesis, and metastasis. UA also suppressed the leukemoid reaction and the EMH phenomenon of the tumor bearing mice without any significant suppression on body weight (i.p. by 20 mg/kg for 28 days). This is associated with the significant decrease in white blood cells (WBC), platelets (PLT) and spleen weight. During this process, we also detected the down-regulation of cell proliferative genes (PCNA, and β-catenin), and metastatic genes (VEGF, and HIF-1α), as well as the depression of nuclear protein intensity of HIF-1α. Furthermore, the expression of E2F1, p53 and MDM2 genes were increased in UA group when the VEGF and HIF-1α was over-expressed. Cancer cells were sensitive to UA treating after the silencing of HIF-1α and the response of Hypoxic pathway reporter to UA was suppressed when HIF-1α was over expressed. Overall, our results from experimental and predictive studies suggest that the anticancer activity of UA may be at least in part caused by suppressing the cancer hypoxia and hypoxia-mediated EMH.
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Affiliation(s)
- Jian-Li Gao
- Zhejiang Chinese Medical University, Hangzhou, 310053, China
- Molecular Oncology Laboratory, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Yan-Mei Shui
- Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Wei Jiang
- Molecular Oncology Laboratory, The University of Chicago Medical Center, Chicago, IL 60637, USA
| | - En-Yi Huang
- Chongqing Medical University, Chongqing 400016, China
| | - Qi-Yang Shou
- Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Xin Ji
- School of Medicine, Zhejiang University, Hangzhou, 310058, China
| | - Bai-Cheng He
- Chongqing Medical University, Chongqing 400016, China
| | - Gui-Yuan Lv
- Zhejiang Chinese Medical University, Hangzhou, 310053, China
| | - Tong-Chuan He
- Molecular Oncology Laboratory, The University of Chicago Medical Center, Chicago, IL 60637, USA
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15
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Berg A, Fasmer KE, Mauland KK, Ytre-Hauge S, Hoivik EA, Husby JA, Tangen IL, Trovik J, Halle MK, Woie K, Bjørge L, Bjørnerud A, Salvesen HB, Henrica M. J. W, Krakstad C, Haldorsen IS. Tissue and imaging biomarkers for hypoxia predict poor outcome in endometrial cancer. Oncotarget 2016; 7:69844-69856. [PMID: 27634881 PMCID: PMC5342519 DOI: 10.18632/oncotarget.12004] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2016] [Accepted: 09/04/2016] [Indexed: 01/03/2023] Open
Abstract
Hypoxia is frequent in solid tumors and linked to aggressive phenotypes and therapy resistance. We explored expression patterns of the proposed hypoxia marker HIF-1α in endometrial cancer (EC) and investigate whether preoperative functional imaging parameters are associated with tumor hypoxia. Expression of HIF-1α was explored both in the epithelial and the stromal tumor component. We found that low epithelial HIF-1α and high stromal HIF-1α expression were significantly associated with reduced disease specific survival in EC. Only stromal HIF-1α had independent prognostic value in Cox regression analysis. High stromal HIF-1α protein expression was rare in the premalignant lesions of complex atypical hyperplasia but increased significantly to invasive cancer. High stromal HIF-1α expression was correlated with overexpression of important genes downstream from HIF-1α, i.e. VEGFA and SLC2A1 (GLUT1). Detecting hypoxic tumors with preoperative functional imaging might have therapeutic benefits. We found that high stromal HIF-1α expression associated with high total lesion glycolysis (TLG) at PET/CT. High expression of a gene signature linked to hypoxia also correlated with low tumor blood flow at DCE-MRI and increased metabolism measured by FDG-PET. PI3K pathway inhibitors were identified as potential therapeutic compounds in patients with lesions overexpressing this gene signature. In conclusion, we show that high stromal HIF-1α expression predicts reduced survival in EC and is associated with increased tumor metabolism at FDG-PET/CT. Importantly; we demonstrate a correlation between tissue and imaging biomarkers reflecting hypoxia, and also possible treatment targets for selected patients.
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Affiliation(s)
- Anna Berg
- Center for Cancer Biomarkers, Department of Clinical Science, University of Bergen, Norway
- Department of Gynecology and Obstetrics, Haukeland University Hospital, Norway
| | | | - Karen K. Mauland
- Center for Cancer Biomarkers, Department of Clinical Science, University of Bergen, Norway
- Department of Gynecology and Obstetrics, Haukeland University Hospital, Norway
| | - Sigmund Ytre-Hauge
- Department of Radiology, Haukeland University Hospital, Norway
- Section of Radiology, Department of Clinical Medicine, University of Bergen, Norway
| | - Erling A. Hoivik
- Center for Cancer Biomarkers, Department of Clinical Science, University of Bergen, Norway
- Department of Gynecology and Obstetrics, Haukeland University Hospital, Norway
| | - Jenny A. Husby
- Department of Radiology, Haukeland University Hospital, Norway
- Section of Radiology, Department of Clinical Medicine, University of Bergen, Norway
| | - Ingvild L. Tangen
- Center for Cancer Biomarkers, Department of Clinical Science, University of Bergen, Norway
- Department of Gynecology and Obstetrics, Haukeland University Hospital, Norway
| | - Jone Trovik
- Center for Cancer Biomarkers, Department of Clinical Science, University of Bergen, Norway
- Department of Gynecology and Obstetrics, Haukeland University Hospital, Norway
| | - Mari K. Halle
- Center for Cancer Biomarkers, Department of Clinical Science, University of Bergen, Norway
- Department of Gynecology and Obstetrics, Haukeland University Hospital, Norway
| | - Kathrine Woie
- Department of Gynecology and Obstetrics, Haukeland University Hospital, Norway
| | - Line Bjørge
- Center for Cancer Biomarkers, Department of Clinical Science, University of Bergen, Norway
- Department of Gynecology and Obstetrics, Haukeland University Hospital, Norway
| | - Atle Bjørnerud
- Department of Physics, University of Oslo, Norway
- The Intervention Center, Oslo University Hospital, Norway
| | - Helga B. Salvesen
- Center for Cancer Biomarkers, Department of Clinical Science, University of Bergen, Norway
- Department of Gynecology and Obstetrics, Haukeland University Hospital, Norway
| | - Werner Henrica M. J.
- Center for Cancer Biomarkers, Department of Clinical Science, University of Bergen, Norway
- Department of Gynecology and Obstetrics, Haukeland University Hospital, Norway
| | - Camilla Krakstad
- Department of Gynecology and Obstetrics, Haukeland University Hospital, Norway
- Center for Cancer Biomarkers, Department of Biomedicine, University of Bergen, Norway
| | - Ingfrid S. Haldorsen
- Department of Radiology, Haukeland University Hospital, Norway
- Section of Radiology, Department of Clinical Medicine, University of Bergen, Norway
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Jun JC, Devera R, Unnikrishnan D, Shin MK, Bevans-Fonti S, Yao Q, Rathore A, Younas H, Halberg N, Scherer PE, Polotsky VY. Adipose HIF-1α causes obesity by suppressing brown adipose tissue thermogenesis. J Mol Med (Berl) 2016; 95:287-297. [PMID: 27738746 DOI: 10.1007/s00109-016-1480-6] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 09/27/2016] [Accepted: 10/06/2016] [Indexed: 12/18/2022]
Abstract
Hypoxia-inducible factor-1α (HIF-1α) in adipose tissue is known to promote obesity. We hypothesized that HIF-1α interferes with brown fat thermogenesis, thus decreasing energy expenditure. To test this hypothesis, we compared transgenic mice constitutively expressing HIF-1α in adipose tissues (HIF-1α++) at usual temperature (22 °C), where brown fat is somewhat active, or at thermoneutrality (30 °C), where brown fat is minimally active. HIF-1α++ mice or control litter mates were separated into room temperature (22 °C) or thermoneutrality (30 °C) groups. We assessed weight gain, food intake, calorimetry, activity, and oxygen consumption and transcriptional changes in isolated white and brown adipocytes. At 22 °C, HIF-1α++ mice exhibited accelerated weight gain, cold and glucose intolerance, hyperglycemia, and decreased energy expenditure without changes in food intake or activity. These changes were absent or minimal at thermoneutrality. In brown adipocytes of HIF-1α++ mice, oxygen consumption decreased ~50 % in association with reduced mitochondrial content, uncoupling protein 2, and peroxisome proliferator-activated receptor gamma coactivator 1 (PGC-1α). In conclusion, adipose HIF-1α overexpression inhibits thermogenesis and cellular respiration in brown adipose tissue, promoting obesity in the setting of reduced ambient temperature. KEY MESSAGE Constitutive HIF-1α activation in adipose tissue promotes weight gain in mice. The weight gain is associated with reduced brown adipose tissue function and oxygen consumption. Reduced oxygen consumption may be mediated by reductions in mitochondria.
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Affiliation(s)
- Jonathan C Jun
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Johns Hopkins, University School of Medicine, 5501 Hopkins Bayview Circle Room 4A30A, Baltimore, MD, 21224, USA.
| | - Ronald Devera
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Johns Hopkins, University School of Medicine, 5501 Hopkins Bayview Circle Room 4A30A, Baltimore, MD, 21224, USA
| | - Dileep Unnikrishnan
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Johns Hopkins, University School of Medicine, 5501 Hopkins Bayview Circle Room 4A30A, Baltimore, MD, 21224, USA
| | - Mi-Kyung Shin
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Johns Hopkins, University School of Medicine, 5501 Hopkins Bayview Circle Room 4A30A, Baltimore, MD, 21224, USA
| | - Shannon Bevans-Fonti
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Johns Hopkins, University School of Medicine, 5501 Hopkins Bayview Circle Room 4A30A, Baltimore, MD, 21224, USA
| | - Qiaoling Yao
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Johns Hopkins, University School of Medicine, 5501 Hopkins Bayview Circle Room 4A30A, Baltimore, MD, 21224, USA
| | - Aman Rathore
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Johns Hopkins, University School of Medicine, 5501 Hopkins Bayview Circle Room 4A30A, Baltimore, MD, 21224, USA
| | - Haris Younas
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Johns Hopkins, University School of Medicine, 5501 Hopkins Bayview Circle Room 4A30A, Baltimore, MD, 21224, USA
| | - Nils Halberg
- Touchstone Diabetes Center, Departments of Internal Medicine and Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Philipp E Scherer
- Touchstone Diabetes Center, Departments of Internal Medicine and Cell Biology, University of Texas Southwestern Medical Center, Dallas, TX, 75390, USA
| | - Vsevolod Y Polotsky
- Division of Pulmonary and Critical Care Medicine, Department of Medicine, Johns Hopkins, University School of Medicine, 5501 Hopkins Bayview Circle Room 4A30A, Baltimore, MD, 21224, USA
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Sánchez-Romero C, Bologna-Molina R, Mosqueda-Taylor A, Paes de Almeida O. Immunohistochemical Expression of GLUT-1 and HIF-1α in Tooth Germ, Ameloblastoma, and Ameloblastic Carcinoma. Int J Surg Pathol 2016; 24:410-8. [PMID: 27020375 DOI: 10.1177/1066896916640359] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [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] [Indexed: 02/05/2023]
Abstract
Hypoxia-inducible factor-1α (HIF-1α) promotes proteins that enable cell survival during hypoxia, such as glucose transporter 1 (GLUT-1). Their coexpression has been associated with aggressiveness in malignancies and has not been studied in odontogenic tumors. Immunohistochemical expression of HIF-1α and GLUT-1 was analyzed in 13 tooth germs (TGs), 55 ameloblastomas (AMs), and 3 ameloblastic carcinomas (ACs). HIF-1α was negative in all TGs, and just 1 case of AM and 1 of AC had nuclear positivity. GLUT-1 expressed in ameloblastic cells of all TGs, AMs, and ACs, with an increasing intensity, respectively, and was significantly higher in solid AM than in unicystic AM (P = .041). Absence of nuclear HIF-1α in TGs and most AMs suggest that GLUT-1 may be induced by alternative pathways to hypoxia. However, in ACs, HIF-1α may be activated; however, to confirm this, additional cases are needed. GLUT-1 overexpression could be related to aggressiveness in AMs and ACs and must represent a normal metabolite in TGs.
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18
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Badowska-Kozakiewicz A, Sobol M, Patera J. Expression of Hypoxia-Inducible Factor 1α in Invasive Breast Cancer with Metastasis to Lymph Nodes: Correlation with Steroid Receptors, HER2 and EPO-R. ADV CLIN EXP MED 2016; 25:741-50. [PMID: 27629849 DOI: 10.17219/acem/63143] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [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: 01/14/2016] [Revised: 05/04/2016] [Accepted: 05/12/2016] [Indexed: 11/24/2022]
Abstract
BACKGROUND Expression of hypoxia-inducible factor 1α (HIF-1α) reflects the degree of cell hypoxia and its increased expression was found in most neoplasms, their metastasis as well as in some precancerous lesions. OBJECTIVES The study aimed to investigate the expression HIF-1α in invasive breast cancer with metastasis to lymph nodes in correlation with steroid receptors (ER-estrogen receptor, PR-progesterone receptor), HER2 (human epidermal growth factor receptor 2) and EPO-R (erythropoietin receptor). MATERIAL AND METHODS A total of 58 cases of invasive breast cancer with metastasis to lymph nodes were assessed for expression of HIF-1α, EPO-R, ER, PR and HER2. RESULTS In our study, among all invasive breast cancers, 36.2% exhibited HIF-1α expression in the nuclei of neoplastic cells. We also assessed the correlation between histological type of cancer and basic immunohistochemical profile that included HIF-1α expression and statistical significance was noted only in the case of PR-/ER-/HER2-/ /HIF-1α-/ and PR+/ER+/HER2-/HIF-1α-/ (p = 0.028 and p = 0.008, respectively). However, only in the case of the PR+/ER+/HER2-/HIF-1α+/ immunohistochemical profile and histological grading did we note a statistical significance (p = 0.006). Expression of HIF-1α was most often noted in cancers exhibiting expression of HER2 protein (57.14%). Our study also assessed the relationship between the expression of HIF-1α in invasive breast cancers and the expression of EPO-R and areas of necrosis, demonstrating a statistically significant dependence (p = 0.003). CONCLUSIONS Expression of HIF-1α was more often noted in invasive HER2+ cancers characterized by high degree of aggressiveness and poorer prognosis, which might suggest that presence of HIF-1α protein expression in HER2+ cancers could be an additional prognostic factor, the frequent occurrence of the phenotype of HIF-1α and EPO-R in cancers invasive HER2 +, in the absence of ER and PR, may suggest that HIF-1α and EPO-R may be an indicator of the aggressiveness of invasive breast cancers, indicating the need for a specific forms of treatment in this group of patients.
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MESH Headings
- Adult
- Aged
- Biomarkers, Tumor/analysis
- Breast Neoplasms/metabolism
- Breast Neoplasms/pathology
- Female
- Humans
- Hypoxia-Inducible Factor 1, alpha Subunit/analysis
- Hypoxia-Inducible Factor 1, alpha Subunit/biosynthesis
- Immunohistochemistry
- Lymphatic Metastasis
- Middle Aged
- Receptor, ErbB-2/analysis
- Receptor, ErbB-2/biosynthesis
- Receptors, Erythropoietin/analysis
- Receptors, Erythropoietin/biosynthesis
- Receptors, Estrogen/analysis
- Receptors, Estrogen/biosynthesis
- Receptors, Progesterone/analysis
- Receptors, Progesterone/biosynthesis
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Affiliation(s)
| | - Maria Sobol
- Department of Human Biophysics and Physiology, Medical University of Warsaw, Poland
| | - Janusz Patera
- Department of Pathomorphology, Military Institute of Health Services, Warszawa, Poland
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Abstract
Tumor hypoxia is a clinically relevant cause of radiation resistance. Direct measurements of tumor oxygenation have been performed predominantly with the Eppendorf histograph and these have defined the reduced prognosis after radiotherapy in poorly oxygenated tumors, especially head-and-neck cancer, cervix cancer and sarcoma. Exogenous markers have been used for immunohistochemical detection of hypoxic tumor areas (pimonidazole) or for positron-emission tomography (PET) imaging (misonidazole). Overexpression of hypoxia-related proteins such as hypoxia-inducible factor-1α (HIF-1α) has also been linked to poor prognosis after radiotherapy and such proteins are considered as potential endogenous hypoxia markers.
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Affiliation(s)
- Dirk Vordermark
- Universitätsklinik und Poliklinik für Strahlentherapie, Martin-Luther-Universität Halle-Wittenberg, Halle/Saale, Germany.
| | - Michael R Horsman
- Department of Experimental Clinical Oncology, Aarhus University Hospital, Aarhus, Denmark
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Sun S, Chen S, Liu F, Wu H, McHugh J, Bergin IL, Gupta A, Adams D, Guan JL. Constitutive Activation of mTORC1 in Endothelial Cells Leads to the Development and Progression of Lymphangiosarcoma through VEGF Autocrine Signaling. Cancer Cell 2015; 28:758-772. [PMID: 26777415 PMCID: PMC4828306 DOI: 10.1016/j.ccell.2015.10.004] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [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: 09/22/2014] [Revised: 07/16/2015] [Accepted: 10/08/2015] [Indexed: 01/26/2023]
Abstract
Angiosarcoma/lymphangiosarcoma is a rare malignancy with poor prognosis. We generated a mouse model with inducible endothelial-cell-specific deletion of Tsc1 to examine mTORC1 signaling in lymphangiosarcoma. Tsc1 loss increased retinal angiogenesis in neonates and led to endothelial proliferative lesions from vascular malformations to vascular tumors in adult mice. Sustained mTORC1 signaling was required for lymphangiosarcoma development and maintenance. Increased VEGF expression in tumor cells was seen, and blocking autocrine VEGF signaling abolished vascular tumor development and growth. We also found significant correlations between mTORC1 activation and VEGF, HIF1α, and c-Myc expression in human angiosarcoma samples. These studies demonstrated critical mechanisms of aberrant mTORC1 activation in lymphangiosarcoma and validate the mice as a valuable model for further study.
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MESH Headings
- Angiogenesis Inhibitors/pharmacology
- Animals
- Autocrine Communication/drug effects
- Cell Movement
- Cell Proliferation
- Cell Transformation, Neoplastic/genetics
- Cell Transformation, Neoplastic/metabolism
- Cell Transformation, Neoplastic/pathology
- Cells, Cultured
- Endothelial Cells/drug effects
- Endothelial Cells/enzymology
- Endothelial Cells/pathology
- Enzyme Activation
- Genotype
- Humans
- Hypoxia-Inducible Factor 1, alpha Subunit/analysis
- Hypoxia-Inducible Factor 1, alpha Subunit/genetics
- Hypoxia-Inducible Factor 1, alpha Subunit/metabolism
- Lymphangiosarcoma/drug therapy
- Lymphangiosarcoma/genetics
- Lymphangiosarcoma/metabolism
- Lymphangiosarcoma/pathology
- Mechanistic Target of Rapamycin Complex 1
- Mice, Knockout
- Mice, Nude
- Multiprotein Complexes/antagonists & inhibitors
- Multiprotein Complexes/metabolism
- Neoplasm Invasiveness
- Neovascularization, Pathologic
- Phenotype
- Protein Kinase Inhibitors/pharmacology
- Proto-Oncogene Proteins c-myc/analysis
- Proto-Oncogene Proteins c-myc/genetics
- Proto-Oncogene Proteins c-myc/metabolism
- RNA Interference
- Receptors, Vascular Endothelial Growth Factor/metabolism
- Retinal Neovascularization/genetics
- Retinal Neovascularization/metabolism
- Retinal Neovascularization/pathology
- Signal Transduction
- TOR Serine-Threonine Kinases/antagonists & inhibitors
- TOR Serine-Threonine Kinases/metabolism
- Transfection
- Tuberous Sclerosis Complex 1 Protein
- Tumor Burden
- Tumor Suppressor Proteins/genetics
- Tumor Suppressor Proteins/metabolism
- Vascular Endothelial Growth Factor A/analysis
- Vascular Endothelial Growth Factor A/antagonists & inhibitors
- Vascular Endothelial Growth Factor A/metabolism
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Affiliation(s)
- Shaogang Sun
- Department of Cancer Biology, College of Medicine, University of Cincinnati, Cincinnati, OH 45267, USA
| | - Song Chen
- Department of Cancer Biology, College of Medicine, University of Cincinnati, Cincinnati, OH 45267, USA
| | - Fei Liu
- Department of Biologic and Materials Sciences, University of Michigan, Ann Arbor, MI 48109, USA
| | - Haige Wu
- Department of Cancer Biology, College of Medicine, University of Cincinnati, Cincinnati, OH 45267, USA
| | - Jonathan McHugh
- Department of Pathology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Ingrid L Bergin
- Unit for Laboratory Animal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | - Anita Gupta
- Department of Pathology, Cincinnati Children's Hospital Medical Center, College of Medicine, University of Cincinnati, Cincinnati, OH 45267, USA
| | - Denise Adams
- Department of Pediatrics, College of Medicine, University of Cincinnati, Cincinnati, OH 45267, USA
| | - Jun-Lin Guan
- Department of Cancer Biology, College of Medicine, University of Cincinnati, Cincinnati, OH 45267, USA.
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Lin S, Lai H, Qin Y, Chen J, Lin Y. Thymidine phosphorylase and hypoxia-inducible factor 1-α expression in clinical stage II/III rectal cancer: association with response to neoadjuvant chemoradiation therapy and prognosis. Int J Clin Exp Pathol 2015; 8:10680-10688. [PMID: 26617778 PMCID: PMC4637593] [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: 07/12/2015] [Accepted: 08/22/2015] [Indexed: 06/05/2023]
Abstract
The aim of this study was to determine whether pretreatment status of thymidine phosphorylase (TP), and hypoxia-inducible factor alpha (HIF-1α) could predict pathologic response to neoadjuvant chemoradiation therapy with oxaliplatin and capecitabine (XELOXART) and outcomes for clinical stage II/III rectal cancer patients. A total of 180 patients diagnosed with clinical stage II/III rectal cancer received XELOXART. The status of TP, and HIF-1α were determined in pretreatment biopsies by immunohistochemistry (IHC). Tumor response was assessed in resected regimens using the tumor regression grade system and TNM staging system. 5-year disease free survival (DFS) and 5-year overall survival (OS) were evaluated with the Kaplan-Meier method and were compared by the log-rank test. Over expression of TP and low expression of HIF-1α were associated with pathologic response to XELOXART and better outcomes (DFS and OS) in clinical stage II/III rectal cancer patients (P < 0.05). Our result suggested that pretreatment status of TP and HIF-1α were found to predict pathologic response and outcomes in clinical stage II/III rectal cancer received XELOXART. Additional well-designed, large sample, multicenter, prospective studies are needed to confirm the result of this study.
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Affiliation(s)
- Shuhan Lin
- Department of Gastrointestinal Surgery, Affiliated Tumor Hospital of Guangxi Medical UniversityNanning 530021, Guangxi Autonomous Region, China
- Department of Colorectal and Anal Surgery, First Affiliated Hospital, Guangxi Medical UniversityNanning 530021, Guangxi Autonomous Region, China
| | - Hao Lai
- Department of Gastrointestinal Surgery, Affiliated Tumor Hospital of Guangxi Medical UniversityNanning 530021, Guangxi Autonomous Region, China
| | - Yuzhou Qin
- Department of Gastrointestinal Surgery, Affiliated Tumor Hospital of Guangxi Medical UniversityNanning 530021, Guangxi Autonomous Region, China
| | - Jiansi Chen
- Department of Gastrointestinal Surgery, Affiliated Tumor Hospital of Guangxi Medical UniversityNanning 530021, Guangxi Autonomous Region, China
| | - Yuan Lin
- Department of Gastrointestinal Surgery, Affiliated Tumor Hospital of Guangxi Medical UniversityNanning 530021, Guangxi Autonomous Region, China
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Ceyran AB, Şenol S, Güzelmeriç F, Tunçer E, Tongut A, Özbek B, Şavluk Ö, Aydın A, Ceyran H. Effects of hypoxia and its relationship with apoptosis, stem cells, and angiogenesis on the thymus of children with congenital heart defects: a morphological and immunohistochemical study. Int J Clin Exp Pathol 2015; 8:8038-8047. [PMID: 26339370 PMCID: PMC4555698] [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: 05/21/2015] [Accepted: 06/28/2015] [Indexed: 06/05/2023]
Abstract
INTRODUCTION The thymus slowly involutes with age after puberty. Various stress conditions accelerate the involution of the thymus and cause changes in the histologic structure of the gland. OBJECTIVE The present study performed histomorphological and immunohistochemical (IHC) evaluations of the thymus glands removed during surgical repair in patients with cyanotic or acyanotic congenital heart disease (CHD). The thymus glands in the hypoxic group were compared to those in the non-hypoxic group. This study suggested that the activation of HIF-1 alpha promotes tumor progression and impair prognosis due to the inhibition of apoptosis, increased population of stem cells, and induction of angiogenesis also suggested that inactivation of HIF-1 alpha in tumor-infiltrated tissues could halt tumor progression and improve prognosis. MATERIALS AND METHODS The study included 76 thymus glands removed from patients who underwent an operation due to CHD. Of these cases, 38 had cyanotic CHD, and constituted the hypoxic group. The remaining 38 patients had acyanotic CHD, and constituted the non-hypoxic group. IHC procedures were performed for HIF-1 alpha, FoxP3, CD44, Bcl-2, and CD34. RESULTS There were statistically significant differences between the hypoxic and non-hypoxic groups only in terms of medullary enlargement toward the cortex and effacement of the corticomedullary junction. In the immunohistochemical examination for five markers, staining intensity and staining rates increased with decreasing oxygen saturation. CONCLUSION It can be concluded that the activation of HIF-1 alpha promotes tumor progression and impair prognosis due to the inhibition of apoptosis, increased population of stem cells, and induction of angiogenesis.
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Affiliation(s)
- A Bahar Ceyran
- Department of Pathology, Medeniyet University, Göztepe Training and Research Hospitalİstanbul, Turkey
| | - Serkan Şenol
- Department of Pathology, Medeniyet University, Göztepe Training and Research Hospitalİstanbul, Turkey
| | - Füsun Güzelmeriç
- Department of Anesthesiology, Koşuyolu Training and Research Hospitalİstanbul, Turkey
| | - Eylem Tunçer
- Department of Pediatric Cardiac Surgery, Koşuyolu Training and Research Hospitalİstanbul, Turkey
| | - Aybala Tongut
- Department of Pediatric Cardiac Surgery, Koşuyolu Training and Research Hospitalİstanbul, Turkey
| | - Babürhan Özbek
- Department of Pediatric Cardiac Surgery, Koşuyolu Training and Research Hospitalİstanbul, Turkey
| | - Ömer Şavluk
- Department of Anesthesiology, Koşuyolu Training and Research Hospitalİstanbul, Turkey
| | - Abdullah Aydın
- Department of Pathology, Medeniyet University, Göztepe Training and Research Hospitalİstanbul, Turkey
| | - Hakan Ceyran
- Department of Pediatric Cardiac Surgery, Koşuyolu Training and Research Hospitalİstanbul, Turkey
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23
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Wang JS, Jing CQ, Shan KS, Chen YZ, Guo XB, Cao ZX, Mu LJ, Peng LP, Zhou ML, Li LP. Semaphorin 4D and hypoxia-inducible factor-1α overexpression is related to prognosis in colorectal carcinoma. World J Gastroenterol 2015; 21:2191-2198. [PMID: 25717256 PMCID: PMC4326158 DOI: 10.3748/wjg.v21.i7.2191] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2014] [Revised: 09/17/2014] [Accepted: 11/11/2014] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate semaphorin 4D (Sema4D) and hypoxia-inducible factor-1α (HIF-1α) expression in colorectal carcinoma and evaluate their clinicopathological and prognostic significance.
METHODS: Eighty-six curatively resected colorectal carcinoma patients at different stages of disease were randomly selected from the group of patients who underwent surgery, and none of them received preoperative radiochemotherapy. Normal proximal adjacent bowel tissue, which served as an internal control, was obtained from 52 randomly selected patients. Immunohistochemistry was performed to analyze the expression of Sema4D and the tumor angiogenesis-related protein HIF-1α in normal colorectal tissues and colorectal carcinoma tissues. The relationships between the expression and clinical characters and prognosis were analyzed.
RESULTS: HIF-1α and Sema4D were positively expressed in 58% and 60% of colorectal carcinoma tissues, respectively. Significantly lower expression levels were observed in normal mucosa (8% and 12%, respectively). HIF-1α and Sema4D expression was closely correlated with histological tumor type, tumor-node-metastasis (TNM) stage, and lymphatic metastasis (P < 0.05), but not with age or tumor size (P > 0.05). HIF-1α and Sema4D protein expression was significantly correlated with prognosis of colorectal carcinoma, as determined by Spearman rank correlation analysis (r = 0.567; P < 0.01). Multivariate Cox analysis revealed that only Sema4D expression played a significant role in predicting patient prognosis (P < 0.05).
CONCLUSION: These findings suggest that HIF-1α and Sema4D expression correlates with histological tumor type, TNM stage, and lymphatic metastasis in colorectal carcinoma and that Sema4D is a prognostic indicator of colorectal carcinoma.
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24
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Li W, Wang K, Liu Z, Ding W. HIF-1α change in serum and callus during fracture healing in ovariectomized mice. Int J Clin Exp Pathol 2015; 8:117-126. [PMID: 25755698 PMCID: PMC4348821] [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: 10/25/2014] [Accepted: 12/22/2014] [Indexed: 06/04/2023]
Abstract
The purpose was to detect the effects of ovariectomy (OVX) on femoral fracture healing through different angiogenesis and HIF-1α expression in mice. Thirty-six young female C57 mice were randomized into two groups: OVX and age-matched intact control (CON). The femoral fracture was generated at 3 weeks after OVX or CON. At 2 or 4 weeks after fracture, the femoral fracture area was evaluated healing status by bone mineral density (BMD), callus formation and mineralization and neovascularization in callus, biomechanical analysis, and HIF-1α tests. OVX mice showed lower BMD as compared with CON mice. Callus geometric microstructural parameters of the femora in OVX mice were significantly lower than CON mice. OVX induced significant changes of biomechanical parameters in the femoral fracture healing area. The callus forming, callus neovascularization and HIF-1α tests in OVX mice were significantly lower than in CON mice. HIF-1α results have the positive proportion with osteoporotic fracture healing.
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Affiliation(s)
- Wenliang Li
- Department of Orthopaedics, Third Affiliated Hospital of Suzhou University Changzhou 213003, China
| | - Kejie Wang
- Department of Orthopaedics, Third Affiliated Hospital of Suzhou University Changzhou 213003, China
| | - Zhiwei Liu
- Department of Orthopaedics, Third Affiliated Hospital of Suzhou University Changzhou 213003, China
| | - Wenge Ding
- Department of Orthopaedics, Third Affiliated Hospital of Suzhou University Changzhou 213003, China
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Kumar GK, Peng YJ, Nanduri J, Prabhakar NR. Carotid Body Chemoreflex Mediates Intermittent Hypoxia-Induced Oxidative Stress in the Adrenal Medulla. Adv Exp Med Biol 2015; 860:195-9. [PMID: 26303481 PMCID: PMC4872510 DOI: 10.1007/978-3-319-18440-1_21] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
Intermittent hypoxia (IH) increases reactive oxygen species generation resulting in oxidative stress in the adrenal medulla (AM), a major end-organ of the sympathetic nervous system which facilitates catecholamine secretion by hypoxia. Here, we show that carotid body chemoreflex contributes to IH-induced oxidative stress in the AM. Carotid bodies were ablated by cryocoagulation of glomus cells, the putative O(2) sensing cells. Carotid body ablated (CBA) and control rats were exposed to IH and the redox state of the AM was assessed biochemically. We found that IH raised reactive oxygen species levels along with an increase in NADPH oxidase (Nox), a pro-oxidant enzyme and a decrease in superoxide dismutase-2 (SOD2), an anti-oxidant enzyme. Further, IH increased hypoxia-inducible factor (HIF)-1α, whereas decreased HIF-2α, the transcriptional regulator of Nox and SOD-2, respectively. These IH-induced changes in the AM were absent in CBA rats. Moreover, IH increased splanchnic nerve activity and facilitated hypoxia-evoked catecholamine efflux from the AM and CBA prevented these effects. These findings suggest that IH-induced oxidative stress and catecholamine efflux in the AM occurs via carotid body chemoreflex involving HIF α isoform mediated imbalance in pro-, and anti-oxidant enzymes.
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Liu Y, Man SH, Liu X, Ding XY, Xiao WL. Identification of cervical cancer markers using cDNA subtraction approach. EUR J GYNAECOL ONCOL 2015; 36:730-733. [PMID: 26775362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
PURPOSE OF INVESTIGATION Cervical cancer markers are not well known for accurate detection of the disease. MATERIALS AND METHODS In the present study, cervical cancer samples were collected from the 42 patients in the Department of Surgery and Medicine of Weifang People's Hospital and Medical College, Shandong, China. The cDNA subtraction approach was performed to find out the specific transcripts, which are responsible for cervical cancer. The specific differentially expressed transcripts were identified by Basic Local Alignment Search Tool (BLAST) analysis and the results were validated by immunohistochemistry. RESULTS Following differentially expressed specific transcripts, such as ID-1, Hif 1a, and the Y-box were usefully employed as a marker to accurately detect cervical cancer. CONCLUSION. The identified markers are promising in the accurate detection of cervical cancer in terms of its molecular basis and management of the disease.
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Wan L, Huang J, Chen J, Wang R, Dong C, Lu S, Wu X. Expression and significance of FOXP1, HIF-1a and VEGF in renal clear cell carcinoma. J BUON 2015; 20:188-195. [PMID: 25778315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
PURPOSE To investigate the expressions of FOXP1, hypoxia inducible factor (HIF)-1a and vascular endothelial growth factor (VEGF) in renal cell carcinoma of the clear type (CCRCC) and their relationship with the patient clinicopathological features. METHODS The expressions of forkhead box-P1 (FOXP1), HIF-1a and VEGF in 55 cases of CCRCC tissues were determined using immunohistochemistry. Then, their correlations with clinical stage, histological grade and lymph node metastasis were analyzed using chi-square test. RESULTS Thirty-seven of the 55 cases (67.3%) of CCRCC expressed FOXP1 with an abnormal expression rate of 38.2% (21/55), in which there were 10 cases with positive FOXP1 both in the nucleus and the cytoplasm and 11 cases with positive FOXP1 in cell membrane. The abnormal expression rate of FOXP1 inhigh grade CCRCC (G3/G4) was significantly higher than that in low grade CCRCC (G1/G2, p<0.05). FOXP1 expression was significantly correlated with the expression of HIF1 and VEGF (r=0.54, p<0.01 and r=0.37, p<0.05, respectively), but was not obviously correlated with clinical stage, lymph node metastasis and 5-year overall patient survival (p>0.05). CONCLUSION Abnormal expression of FOXP1 and its deficiency are common events in CCRCC. Abnormal expression of FOXP1 may create progression of tumor from low grade to high grade by regulating the HIF-1-VEGF pathway.
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Affiliation(s)
- Li Wan
- Department of Pathology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
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Deng W, Ren Y, Feng X, Yao G, Chen W, Sun Y, Wang H, Gao X, Sun L. Hypoxia inducible factor-1 alpha promotes mesangial cell proliferation in lupus nephritis. Am J Nephrol 2014; 40:507-15. [PMID: 25531641 DOI: 10.1159/000369564] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Accepted: 10/30/2014] [Indexed: 11/19/2022]
Abstract
BACKGROUND Evidence has accumulated that hypoxia plays a significant role in the pathogenesis and progression of both acute renal injury and chronic renal disease. However, little was known about the effects of hypoxia on lupus nephritis (LN). In the current study, we investigated the expression of hypoxia inducible factor-1 alpha (HIF-1α) in LN. METHODS Renal biopsies from 22 LN patients and 20 patients with renal carcinoma were obtained. In situ HIF-1α expression was examined by immunohistochemical staining, and the relationship between HIF-1α and clinical/pathological features was analyzed. HIF-1α expression in kidney from both MRL/lpr and C57BL/6 mice was detected by immunohistochemical technology. Dimethyloxaloylglycine (DMOG), an inhibitor of HIF-degrading prolylhydroxylases, was utilized to prevent HIF-1α degradation in mouse mesangial cells (MCs). After DMOG treatment, the proliferation and apoptosis rates of mouse MCs were determined. RESULTS LN patients showed larger amounts of HIF-1α in both glomerular and tubulointerstitial areas. The levels of intraglomerular HIF-1α were closely associated with renal pathology activity index and clinical manifestations in LN patients. In MRL/lpr mice, intraglomerular HIF-1α-positive cells were also significantly increased. Interestingly, the levels of HIF-1α positively correlated with cell density in glomerulus in both LN patients and MRL/lpr mice. Upon treatment with DMOG, the proliferation of MCs was upregulated, and apoptosis was downregulated. CONCLUSION HIF-1α is highly expressed in both glomerular and tubulointerstitial tissues in LN, especially in proliferative LN. HIF-1α may promote MCs growth through the induction of proliferation and inhibition of apoptosis, and hence plays an important role in the pathogenesis of LN.
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Affiliation(s)
- Wei Deng
- Department of Rheumatology and Immunology, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu, PR China
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Chen L, Pei H, Zhu S, Zhu J, Shi R. [Expression and significance of hypoxia-inducible factor-1α in lung tissues of obesity-asthma rat]. Xi Bao Yu Fen Zi Mian Yi Xue Za Zhi 2014; 30:1262-1265. [PMID: 25481182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To evaluate the expression level of hypoxia-inducible factor-1α (HIF-1α) in the rat model of diet-induced obesity and asthma. METHODS Forty male specific pathogen-free SD rats were randomly divided into four groups: normal body mass control group (group A), asthmatic rats with normal body mass (group B), obese control group (group C) and obese asthmatic rats (group D). The rats in both group A and B were fed basic diet, while those in group C and D were fed high-fat diet in order to establish diet-induced obese rat model. Rats in group B and D were sensitized and challenged with chicken ovalbumin (OVA) to establish the asthmatic model. The white cell count in bronchoalveolar lavage fluid (BALF) was performed. The total area of the airway wall (Wat) was measured by ImagePro Plus software and was standardized by the basement membrane perimeter (Pbm). The expression of HIF-1α in lung tissue was detected by immunohistochemistry. The concentration of HIF-1α in serum was determined by ELISA. The relationships of the total white cells in BALF and airway wall thickness (WAt/Pbm) with the expression of HIF-1α were analyzed by Pearson correlation analysis. RESULTS The total number of white cells in BALF in group D was (98.0±5.5)×10(4)/mL, which was significantly higher than those in group A (24.7±3.3)×10(4)/mL, group C (26.1±3.8)×10(4)/mL and group B (87.8±7.1)×10(4)/mL. The thickness of airway wall (WAt/Pbm) in group D was (9.91±0.56)m(2)/m, which was significantly higher than those in group A (6.11±0.99)m(2)/m and group C(5.99±0.83)m(2)/m, but when compared with that in group B (8.60±0.53)m(2)/m, there was no significant difference. The percentage of HIF-1α positive cells in group D was (19.44±0.96)%, which was significantly higher than those in group A (2.19±0.91)%, group C(2.56±0.89)% and group B (18.25±1.29)% (all P<0.05). The expression of HIF-1α in blood serum and BALF in group D were respectively(29.107±1.576) ng/mL and (0.511±0.011) ng/mL, which were significantly higher than those in group A [(19.380±1.506) ng/mL and (0.280±0.008) ng/mL, respectively], group C [(20.782±2.034) ng/mL and (0.281±0.010) ng/mL, respectively] and group B [(23.961±1.565) ng/mL and (0.397±0.011) ng/mL, respectively]. The expression of HIF-1α was positively correlated with the total number of white cells in BALF and the airway wall thickness. CONCLUSION The expression of HIF-1α in serum and lung tissue from obese asthmatic rats significantly increases, which is positively correlated with the total number of white cells in BALF and the airway wall thickness.
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Affiliation(s)
- Lin Chen
- Department of Respiratory Medicine, Affiliated Hospital, Xuzhou Medical College, Xuzhou 221000, China
| | - Houshuang Pei
- Department of Respiratory Medicine, Central Hospital, Datun Coal and Electricity Group Co., Ltd, Xuzhou 221611, China
| | - Shuyang Zhu
- Department of Respiratory Medicine, Affiliated Hospital, Xuzhou Medical College, Xuzhou 221000, China
| | - Jiechen Zhu
- Department of Respiratory Medicine, Affiliated Hospital, Xuzhou Medical College, Xuzhou 221000, China
| | - Ruirui Shi
- Department of Respiratory Medicine, Affiliated Hospital, Xuzhou Medical College, Xuzhou 221000, China
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30
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Rao Q, Shen Q, Shi S, Xia Q, Lu Z, Yu B, Zhang R, He Y, Wang X, Ma H, Zhou X. [Clinicopathologic features of clear cell papillary renal cell carcinoma]. Zhonghua Bing Li Xue Za Zhi 2014; 43:728-731. [PMID: 25582249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To study the clinicopathological features, differential diagnosis and prognosis of clear cell papillary renal cell carcinoma (CCPRCC). METHODS The histological, immunohistochemical, and molecular features were studied in 11 cases and follow-up data were also analyzed. RESULTS There were a total of 3 females and 8 males. The age of patients were ranged from 33 to 72 years(mean age 52.5 years). The diameters of tumors varied from 1cm to 4 cm. Histologically, papillary and cystic architecture were present at least focally in all tumors. The papillae were covered by small to medium-sized cuboidal cells with abundant clear cytoplasm and often showed extensive secondary branching, which were often folded and densely packed, resulting in a solid appearance. The nuclei were round and uniform in shape; nucleoli were not prominent (Fuhrman grade 1 or 2). Neither mitotic figures nor necrosis was present. All 11 cases exhibited moderate to strong positivity for CK7, CA9, vimentin, and HIF-1α, coupled with negative reactions for CD10, P504S, and TFE3. Ksp-cadherin was positively expressed in 8 cases.VHL gene mutations were not found in all 11 cases. Losses of chromosomes 3 (monoploid chromosome 3) was detected in 3 cases. CONCLUSIONS CCPRCC is uncommon and seemed to be an indolent tumor. The differential diagnosis should be included tumors, which harbor clear cell and papillary structure including clear cell renal cell carcinoma, papillary renal cell carcinoma, Xp11 translocation renal cell carcinoma, and CCPRCC. Immunohistochemical and molecular analysis may be help for its diagnosis.
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Affiliation(s)
- Qiu Rao
- Department of Pathology, Nanjing Jinling Hospital, Nanjing University School of Medicine, Nanjing 210002, China
| | - Qin Shen
- Department of Pathology, Nanjing Jinling Hospital, Nanjing University School of Medicine, Nanjing 210002, China
| | - Shanshan Shi
- Department of Pathology, Nanjing Jinling Hospital, Nanjing University School of Medicine, Nanjing 210002, China
| | - Qiuyuan Xia
- Department of Pathology, Nanjing Jinling Hospital, Nanjing University School of Medicine, Nanjing 210002, China
| | - Zhenfeng Lu
- Department of Pathology, Nanjing Jinling Hospital, Nanjing University School of Medicine, Nanjing 210002, China
| | - Bo Yu
- Department of Pathology, Nanjing Jinling Hospital, Nanjing University School of Medicine, Nanjing 210002, China
| | - Rusong Zhang
- Department of Pathology, Nanjing Jinling Hospital, Nanjing University School of Medicine, Nanjing 210002, China
| | - Yan He
- Department of Pathology, Nanjing Jinling Hospital, Nanjing University School of Medicine, Nanjing 210002, China
| | - Xuan Wang
- Department of Pathology, Nanjing Jinling Hospital, Nanjing University School of Medicine, Nanjing 210002, China
| | - Henghui Ma
- Department of Pathology, Nanjing Jinling Hospital, Nanjing University School of Medicine, Nanjing 210002, China
| | - Xiaojun Zhou
- Department of Pathology, Nanjing Jinling Hospital, Nanjing University School of Medicine, Nanjing 210002, China. E-mail:
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Berlth F, Mönig SP, Schlösser HA, Maus M, Baltin CTH, Urbanski A, Drebber U, Bollschweiler E, Hölscher AH, Alakus H. Validation of 2-mm tissue microarray technology in gastric cancer. Agreement of 2-mm TMAs and full sections for Glut-1 and Hif-1 alpha. Anticancer Res 2014; 34:3313-3320. [PMID: 24982335] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND/AIM Tissue Microarray (TMA) is a widely used method to perform high-throughput immunohistochemical analyses on different tissues by arraying small sample cores from paraffin-fixed tissues into a single paraffin block. TMA-technology has been validated on numerous cancer tissues and also for gastric cancer studies, although it has not been validated for this tumor tissue so far. The objective of this study was to assess, whether the 2-mm TMA-technology is able to provide representative samples of gastric cancer tissue. MATERIALS AND METHODS TMA paraffin blocks were constructed by means of 220 formalin-fixed and paraffin-embedded gastric cancer samples with a sample diameter of 2 mm. The agreement of immunohistochemical stainings of Glut-1 and Hif-1 alpha in TMA sections and the original full sections was calculated using kappa statistics and direct adjustment. RESULTS The congruence was substantial for Glut-1 (kappa 0.64) and Hif-1 alpha (kappa 0.70), but with an agreement of only 71% and 52% within the marker-positive cases of the full-section slides. CONCLUSION Due to tumor heterogeneity primarily, the TMA technology with a 2-mm sample core shows relevant limitations in gastric cancer tissue. Although being helpful for tissue screening purposes, the 2-mm TMA technology cannot be recommended as a method equal to full-section investigations in gastric cancer.
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Affiliation(s)
- Felix Berlth
- Department of General, Visceral and Cancer Surgery, University of Cologne, Cologne, Germany
| | - Stefan P Mönig
- Department of General, Visceral and Cancer Surgery, University of Cologne, Cologne, Germany
| | - Hans A Schlösser
- Department of General, Visceral and Cancer Surgery, University of Cologne, Cologne, Germany
| | - Martin Maus
- Department of General, Visceral and Cancer Surgery, University of Cologne, Cologne, Germany
| | - Christoph T H Baltin
- Department of General, Visceral and Cancer Surgery, University of Cologne, Cologne, Germany
| | - Alexander Urbanski
- Department of General, Visceral and Cancer Surgery, University of Cologne, Cologne, Germany
| | - Uta Drebber
- Department of Pathology, University of Cologne, Cologne, Germany
| | - Elfriede Bollschweiler
- Department of General, Visceral and Cancer Surgery, University of Cologne, Cologne, Germany
| | - Arnulf H Hölscher
- Department of General, Visceral and Cancer Surgery, University of Cologne, Cologne, Germany
| | - Hakan Alakus
- Department of General, Visceral and Cancer Surgery, University of Cologne, Cologne, Germany Department of Pathology, University of Cologne, Cologne, Germany Division of Genome information Sciences, Department of Pediatrics and Rady Children's Hospital, University of California San Diego, La Jolla, CA, U.S.A
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Zhang L, Ye SB, Li ZL, Ma G, Chen SP, He J, Liu WL, Xie D, Zeng YX, Li J. Increased HIF-1alpha expression in tumor cells and lymphocytes of tumor microenvironments predicts unfavorable survival in esophageal squamous cell carcinoma patients. Int J Clin Exp Pathol 2014; 7:3887-3897. [PMID: 25120765 PMCID: PMC4129000] [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: 05/03/2014] [Accepted: 06/24/2014] [Indexed: 06/03/2023]
Abstract
The expression of hypoxia-induced factor (HIF)-1α is up-regulated in tumor microenvironments under hypoxia condition. However, the prognostic significance of HIF-1α in esophageal squamous cell carcinoma (ESCC) is still elusive. We measured the HIF-1α expression by immunochemistry in tumor specimens from 136 resected ESCC; in the current study, the HIF-1α expression in tumor cells was significantly associated with tumor stage (P = 0.003) and lymph node metastasis (P = 0.006); whereas the HIF-1α expression in tumor-infiltrating lymphocytes (TILs) had no relationship with patients' clinicopathological parameters. Patients with high HIF-1α expression in tumor cells or in TILs showed worse survival related to those with low HIF-1α expression. Multivariate analysis demonstrated that expression of HIF-1α in TILs was an independent factor for DFS (P = 0.007) and OS (P = 0.013). Additionally, the expression of HIF-1α in tumor cells was an independent factor for DFS (P = 0.037) and OS (P = 0.033) in locoregional ESCC patients, whereas the expression of HIF-1α in TILs was an independent factor for DFS (P = 0.048) and OS (P = 0.039) in metastatic ESCC patients. Correlation analysis revealed that expressions of HIF-1α in tumor cells and in TILs were positively correlated, and patients with combined high HIF-1α in both tumor cells and TILs had the worst survivals (P < 0.05). These findings suggest that the HIF-1α expressions in different cell populations of ESCC microenvironments have different clinical relevance and prognostic impact on patients.
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Affiliation(s)
- Lin Zhang
- State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer CenterGuangzhou, China
- Department of Clinical Laboratory, Sun Yat-Sen University Cancer CenterGuangzhou, China
| | - Shu-Biao Ye
- State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer CenterGuangzhou, China
- Department of Biotherapy, Sun Yat-Sen University Cancer CenterGuangzhou, China
| | - Ze-Lei Li
- State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer CenterGuangzhou, China
- Department of Biotherapy, Sun Yat-Sen University Cancer CenterGuangzhou, China
| | - Gang Ma
- State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer CenterGuangzhou, China
- Department of Intensive Care Unite, Sun Yat-Sen University Cancer CenterGuangzhou, China
| | - Shi-Ping Chen
- Department of Biotherapy, Sun Yat-Sen University Cancer CenterGuangzhou, China
| | - Jia He
- State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer CenterGuangzhou, China
- Department of Biotherapy, Sun Yat-Sen University Cancer CenterGuangzhou, China
| | - Wan-Li Liu
- State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer CenterGuangzhou, China
- Department of Clinical Laboratory, Sun Yat-Sen University Cancer CenterGuangzhou, China
| | - Dan Xie
- State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer CenterGuangzhou, China
| | - Yi-Xin Zeng
- State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer CenterGuangzhou, China
| | - Jiang Li
- State Key Laboratory of Oncology in South China, Sun Yat-Sen University Cancer CenterGuangzhou, China
- Department of Biotherapy, Sun Yat-Sen University Cancer CenterGuangzhou, China
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Luo HQ, Xu M, Zhong WT, Cui ZY, Liu FM, Zhou KY, Li XY. EGCG decreases the expression of HIF-1α and VEGF and cell growth in MCF-7 breast cancer cells. J BUON 2014; 19:435-439. [PMID: 24965403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
PURPOSE To investigate the effects of epigallocatechin-3-gallate (EGCG) on the expression of HIF-1α and vascular endothelial growth factor (VEGF) and cell growth in MCF-7 breast cancer cells. METHODS MCF-7 human breast cancer cells were pretreated with different concentrations of EGCG (25, 50, 100 mg/L) for 48 h. The growth and proliferation of cells were analyzed by trypan blue staining in the pretreated MCF-7 cells. Furthermore, mRNA expression of HIF-1α and VEGF was detected by reverse transcriptase polymerase chain reaction (RT-PCR) analysis in the pretreated MCF-7 cells. Protein expression of HIF-1α was detected by Western blot, and the secreted protein level of VEGF in the supernatant of the culture medium was analyzed by enzyme linked immuno- sorbent assay (ELISA) in the MCF-7 cells pretreated with different concentrations of EGCG. RESULTS Cell growth decreased dramatically in MCF-7 cells treated with different concentrations of EGCG, compared with untreated (control) cells. Moreover, protein expression of HIF-1α and VEGF declined in a dose-dependent manner in MCF-7 cells pretreated with increasing concentrations of EGCG. CONCLUSIONS EGCG inhibits cell growth and proliferation of MCF-7 breast cancer cells, possibly by inhibiting the protein expression of HIF-1α and VEGF.
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Affiliation(s)
- Hai-qing Luo
- Center of Oncology, The Affiliated Hospital of Guangdong Medical College, Zhanjiang, China
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Li L, Han MX, Li S, Xu Y, Wang L. Hypoxia regulates the proliferation and osteogenic differentiation of human periodontal ligament cells under cyclic tensile stress via mitogen-activated protein kinase pathways. J Periodontol 2014; 85:498-508. [PMID: 23805815 DOI: 10.1902/jop.2013.130048] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Previous studies have shown that periodontal ligament exists in a hypoxic microenvironment, especially under the condition of periodontitis or physical stress. The present study is designed to investigate the effects and mechanisms of hypoxia on regulating the proliferation and osteogenic differentiation of human periodontal ligament cells (hPDLCs) under cyclic tensile stress (CTS). METHODS hPDLCs were cultured in 2% O2 (hypoxia) or 20% O2 (normoxia) and then subjected to a cyclic in-plane tensile deformation of 10% at 0.5 Hz. The following parameters were measured: 1) cell proliferation by flow cytometry; 2) cell ultrastructure by transmission electron microscopy; 3) expression of hypoxia-inducible factor-1α (HIF-1α) and osteogenic relative factors (i.e., secreted phosphoprotein 1 [SPP1; also known as bone sialoprotein I/osteopontin], runt-related transcription factor 2 [RUNX2], and transcription factor Sp7 [SP7]) by real-time polymerase chain reaction and Western blot; and 4) involvement of mitogen-activated protein kinase (MAPK) signaling pathways by Western blot with specific inhibitor. RESULTS Proliferation index in the hypoxia with CTS group was significantly higher than in other groups. Significant increases in HIF-1α, SPP1, RUNX2, and SP7 occurred in the presence of hypoxia for 24 hours. In addition, MAPK inhibitor (PD 98,059) significantly attenuated hypoxia and CTS-induced phosphor-ERK1/2 (extracellular regulated kinase 1/2), phosphor-JNK (c-jun N-terminal kinase), and phosphor-P38 expression. CONCLUSIONS Hypoxia regulates CTS-responsive changes in proliferation and osteogenic differentiation of hPDLCs via MAPK pathways. Hypoxia-treated hPDLCs may serve as an in vitro model to explore the molecular mechanisms of periodontitis.
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Affiliation(s)
- Lu Li
- Institute of Stomatology, Nanjing Medical University, Nanjing, China
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Jeon HM, Kim DH, Jung WH, Koo JS. Expression of cell metabolism-related genes in different molecular subtypes of triple-negative breast cancer. Tumori 2014. [PMID: 24326847 DOI: 10.1700/1361.15110] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
AIMS AND BACKGROUND We evaluated the difference in and significance of cancer cell metabolism by molecular subtyping of triple-negative breast carcinoma. METHODS Tissue microarrays from 122 surgical specimens of triple-negative breast carcinoma patients and immunohistochemical staining for CK5/6, epidermal growth factor receptor, claudin 3, claudin 4, claudin 7, E-cadherin, androgen receptor, and gamma-glutamyltransferase 1 were used to classify triple-negative breast carcinoma as follows: basal-like type, molecular apocrine type, claudin low type, mixed type and null type. In addition, immunohistochemical staining for metabolism-related proteins such as c-myc, insulin-like growth factor (g)-1, hypoxia-inducible factor 1-1α, glucose transporter 1, carbonic anhydrase IX antibody, macrophage migration inhibitory factor, and pyruvate dehydrogenase kinase 1 was used to compare the differences according to molecular subtype and clinicopathological factors. RESULTS The basal-like type showed the highest proportion of high glucose transporter 1 expression (P = 0.049) and carbonic anhydrase IX antibody expression (P = 0.008). Hypoxia-inducible factor 1-1α expression was associated with lymph node metastasis (P = 0.001) and central fibrotic zone (P = 0.012), and high glucose transporter 1 expression was related to high histologic grade (P = 0.007), cytokeratin 5/6 positivity (P = 0.002), and central fibrotic zone (P = 0.017). Finally, carbonic anhydrase IX antibody was associated with cytokeratin 5/6 positivity (P = 0.001) and central fibrotic zone (P = 0.048). CONCLUSIONS Our study revealed the different characteristics of cancer cell metabolism according to the molecular subtypes of triple-negative breast carcinoma. Among them, basal-like type was the most glycolytic and acid-resistant phenotype.
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Lin S, Ma R, Zheng XY, Yu H, Liang X, Lin H, Cai XJ. Meta-analysis of immunohistochemical expression of hypoxia inducible factor-1α as a prognostic role in gastric cancer. World J Gastroenterol 2014; 20:1107-1113. [PMID: 24574785 PMCID: PMC3921536 DOI: 10.3748/wjg.v20.i4.1107] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 10/26/2013] [Accepted: 11/13/2013] [Indexed: 02/07/2023] Open
Abstract
AIM: To conduct a meta-analysis to evaluate the prognostic role of hypoxia inducible factor-1α (HIF-1α) expression in gastric cancer.
METHODS: The PubMed, EMBASE, and Web of Science databases were searched systematically for all articles published in English before August, 2013. Pooled effect was calculated from the available data to evaluate the association between HIF-1α expression and 5-year overall survival and tumor clinicopathological features in gastric cancer patients. Pooled odds ratios (ORs) with 95%CIs were calculated using either a fixed-effects or a random-effects model.
RESULTS: Nine studies matched the selection criteria, which reported on 1103 subjects, 548 of whom had HIF-1α positive expression (50%). This meta-analysis indicated that HIF-1α positive expression in gastric cancer correlated with lower 5-year overall survival (OR = 0.36; 95%CI: 0.21-0.64), worse tumor differentiation (OR = 0.38; 95%CI: 0.23-0.64), deeper invasion (OR = 0.42; 95%CI: 0.32-0.57), higher rates of lymph node metastasis (OR = 2.23; 95%CI: 1.46-3.40), lymphatic invasion (OR = 2.50; 95%CI: 1.46-4.28), and vascular invasion (OR = 1.80; 95%CI: 1.29-2.51), and higher TNM stage (III + IV) (OR = 0.31; 95%CI: 0.15-0.60).
CONCLUSION: HIF-1α positive expression indicates a poor prognosis for patients with gastric cancer. Further studies are required to confirm these results.
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Wachters JE, Schrijvers ML, Slagter-Menkema L, Mastik M, de Bock GH, Langendijk JA, Kluin PM, Schuuring E, van der Laan BFAM, van der Wal JE. Prognostic significance of HIF-1a, CA-IX, and OPN in T1-T2 laryngeal carcinoma treated with radiotherapy. Laryngoscope 2013; 123:2154-60. [PMID: 24167820 DOI: 10.1002/lary.23831] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
OBJECTIVES/HYPOTHESIS To examine the prognostic value of hypoxia inducible factor HIF-1a, CA-IX, and OPN on clinical outcome in patients with T1-T2 supraglottic laryngeal squamous cell carcinoma (LSCC) treated with primarily radiotherapy (RT). STUDY DESIGN Retrospective cohort study. METHODS Tumor tissue sections of 60 patients with T1-T2 supraglottic LSCC treated with primarily radiotherapy were assessed immunohistochemically for expression of HIF-1a, CA-IX, and OPN. The relationship of protein expression and classical clinical parameters with clinical outcome was studied, using Cox regression and Kaplan-Meier survival analyses. RESULTS Neither HIF-1a nor CA-IX was of prognostic significance toward local control or overall survival in T1-T2 supraglottic LSCC. Cox regression survival analysis showed no relation between HIF-1a or CA-IX expression and local control (HR [hazard ratio] 1.07, CI [95% confidence interval] 0.29-3.87; HR 0.34, CI 0.04-2.58). Furthermore, OPN expression was not associated with local control (HR 1.37, CI 0.45-4.17) and overall survival (HR 0.99, CI 0.44-2.21). Our earlier findings in T1-T2 glottic LSCC (Schrijvers et al., 2008) could not be confirmed. CONCLUSION The absence of prognostic significance for HIF-1a and CA-IX toward local control in supraglottic LSCC, unlike glottic LSCC, suggests that supraglottic LSCC might represent another biological entity.
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Kim S, Jun JH, Kim J, Kim DW, Jang YH, Lee WJ, Chung HY, Lee SJ. HIF-1α and VEGF expression correlates with thrombus remodeling in cases of intravascular papillary endothelial hyperplasia. Int J Clin Exp Pathol 2013; 6:2912-2918. [PMID: 24294378 PMCID: PMC3843272] [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: 10/01/2013] [Accepted: 10/15/2013] [Indexed: 06/02/2023]
Abstract
Intravascular papillary endothelial hyperplasia (IPEH) is histopathologically characterized by endothelium-lined papillary structures encircling an acellular fibrin core. The process of IPEH pathogenesis is unclear. The purpose of our study was to identify histopathological and immunohistochemical characteristics of IPEH to better understand the pathogenesis of this disease. After reviewing microscopic and medical records from Kyungpook National University Hospital, we selected 16 cases of IPEH. Masson's trichrome and immunohistochemical staining as well as hematoxylin-eosin staining for 16 cases of IPH were performed. Immunohistochemical studies included CD31, CD68, mast cell tryptase, hypoxia-inducible factor-1 (HIF-1α), and vascular endothelial growth factor (VEGF). Sections from all our cases showed three distinct histological regions including a papillary portion with hyalinized fibrous or fibroblastic cores, an area containing an unorganized thrombus, and organization area with an ingrowth of endothelial cells, myofibroblasts, and fibroblasts. In the organization area, HIF-1α-positive cells were identified in the loose connective tissue. Endothelial cells forming vascular channels were negative for HIF-1α while VEGF was highly expressed in both interstitial mononuclear and endothelial cells. In the papillary portion, the cellular cores were strongly positive for both HIF-1α and VEGF, but the acellular cores were negative. Our investigation confirmed that IPEH is a reactive lesion that incidentally arises during the organization process of older thrombi. It was also found that HIF-1α and VEGF expression was dependent on the thrombus remodeling stage in cases of IPEH.
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Affiliation(s)
- Sunzoo Kim
- Department of Pathology, Kyungpook National University Hospital, Kyungpook National University School of MedicineDaegu, South Korea
| | - Jae Hun Jun
- Department of Dermatology, Kyungpook National University Hospital, Kyungpook National University School of MedicineDaegu, South Korea
| | - Jeongshik Kim
- Department of Pathology, Kyungpook National University Hospital, Kyungpook National University School of MedicineDaegu, South Korea
| | - Do Won Kim
- Department of Dermatology, Kyungpook National University Hospital, Kyungpook National University School of MedicineDaegu, South Korea
| | - Yong Hyun Jang
- Department of Dermatology, Kyungpook National University Hospital, Kyungpook National University School of MedicineDaegu, South Korea
| | - Weon Ju Lee
- Department of Dermatology, Kyungpook National University Hospital, Kyungpook National University School of MedicineDaegu, South Korea
| | - Ho Yun Chung
- Department of Plastic Surgery, Kyungpook National University Hospital, Kyungpook National University School of MedicineDaegu, South Korea
| | - Seok-Jong Lee
- Department of Dermatology, Kyungpook National University Hospital, Kyungpook National University School of MedicineDaegu, South Korea
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Shi SS, Shen Q, Xia QY, Tu P, Shi QL, Zhou XJ, Rao Q. Clear cell papillary renal cell carcinoma: a clinicopathological study emphasizing ultrastructural features and cytogenetic heterogeneity. Int J Clin Exp Pathol 2013; 6:2936-2942. [PMID: 24294381 PMCID: PMC3843275] [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: 09/12/2013] [Accepted: 09/27/2013] [Indexed: 06/02/2023]
Abstract
Clear cell papillary renal cell carcinoma (CCPRCC) is a recently recognized renal neoplasm, which was initially described in end-stage renal disease (ESRD), but some cases have been reported in otherwise normal kidneys. We report a series of 11 CCPRCC (age range, 33-72 years; male-to-female ratio, 8:3). Follow-up was available for 8 patients. No patients developed local recurrence, distant or lymph-node metastasis, or cancer death. Histologically, all tumors exhibit morphologic features typical of CCPRCC including a mixture of cystic and papillary components, covered by small to medium-sized cuboidal cells with abundant clear cytoplasm. All 11 cases exhibited moderate to strong positivity for CK7, CA9, Vim, and HIF-1α, coupled with negative reactions for CD10, P504S, and RCC. We did not find any VHL gene mutations in all 11 cases. Losses of chromosomes 3 (monoploid chromosome 3) was detected in 3 cases. Ultrastructurally, the tumor cells composed of numerous glycogens with scanty cell organelles, reminiscent of clear cell renal cell carcinoma (CCRCC). In conclusion, the coexpression of CA9 and HIF-1α in the absence of VHL gene abnormalities in CCPRCC suggests activation of the HIF pathway by mechanisms independent of VHL gene mutation. Losses of chromosomes 3 (monosomies chromosome 3) was detected in 3 cases suggesting that at least some of these lesions have demonstrated abnormalities of chromosomes 3. Ultrastructurally, CCPRCC composed of numerous glycogens with scanty cell organelles, reminiscent of CCRCC suggesting the close pathogenesis relationship of CCPRCC with CCRCC.
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MESH Headings
- Adult
- Aged
- Antigens, Neoplasm/analysis
- Biomarkers, Tumor/analysis
- Biomarkers, Tumor/genetics
- Carbonic Anhydrase IX
- Carbonic Anhydrases/analysis
- Carcinoma, Renal Cell/chemistry
- Carcinoma, Renal Cell/genetics
- Carcinoma, Renal Cell/surgery
- Carcinoma, Renal Cell/ultrastructure
- Chromosome Deletion
- Chromosomes, Human, Pair 3
- DNA Mutational Analysis
- Female
- Genetic Predisposition to Disease
- Humans
- Hypoxia-Inducible Factor 1, alpha Subunit/analysis
- Immunohistochemistry
- In Situ Hybridization, Fluorescence
- Kidney Neoplasms/chemistry
- Kidney Neoplasms/genetics
- Kidney Neoplasms/surgery
- Kidney Neoplasms/ultrastructure
- Male
- Microscopy, Electron
- Middle Aged
- Mutation
- Nephrectomy
- Phenotype
- Von Hippel-Lindau Tumor Suppressor Protein/genetics
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Affiliation(s)
- Shan-Shan Shi
- Department of Pathology, Nanjing Jinling Hospital, Nanjing University School of Medicine Nanjing, China
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Preusser M, Berghoff AS, Ilhan-Mutlu A, Dinhof C, Magerle M, Marosi C, Hejna M, Capper D, VON Deimling A, Schoppmann SF, Birner P. Brain metastases of gastro-oesophageal cancer: evaluation of molecules with relevance for targeted therapies. Anticancer Res 2013; 33:1065-1071. [PMID: 23482783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
BACKGROUND Brain metastases (BM) of gastro-oesophageal cancer are exceedingly rare and only limited data exist on their pathobiology. MATERIALS AND METHODS We identified tissue samples of BM of gastro-oesophageal cancer and analyzed the expression of human epidermal growth factor receptor-2 (HER2), phosphorylated signal transducer and activator of transcription-3 (pSTAT3), epithelial growth factor receptor (EGFR), V600E point mutation of the v-raf murine sarcoma viral oncogene homolog-B1 (BRAF V600E), cluster of differentiation molecule-34 (CD34), hypoxia inducible factor-1α (HIF 1-α) and Ki-67 by immunohistochemical methods. RESULTS Our series comprised of twenty adenocarcinomas and one oesophageal squamous cell carcinoma. Three (14%), 7 (33%), 9 (43%), 18 (86%) and 0 BM specimens were scored positively for HER2, EGFR, pSTAT3, HIF1-α and BRAF V600E expression. The median Ki-67 index was 59%. The microvascular density was moderate-to-high and active intratumoral microvascular sprouting was evident in 20/21 (95%) of BMs. The HER2 and EGFR expression status were consistent between primary tumors and BM in all three assessable cases. HIF1-α and pSTAT3 expression were significantly higher in HER2-positive cases. CONCLUSION Therapeutic use of agents targeting HER2, pSTAT3, EGFR and angiogenesis may be feasible for selected BM of gastro-esophageal cancer. HER2 positivity does not seem to predispose to brain colonization in gastro-esophageal cancer.
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Affiliation(s)
- Matthias Preusser
- Medical University of Vienna, Department of Surgery, Waehringer Guertel 18-20, 1090 Vienna, Austria.
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Wu Y, Cao H, Yang Y, Zhou Y, Gu Y, Zhao X, Zhang Y, Zhao Z, Zhang L, Yin J. Effects of vascular endothelial cells on osteogenic differentiation of noncontact co-cultured periodontal ligament stem cells under hypoxia. J Periodontal Res 2013; 48:52-65. [PMID: 22905750 DOI: 10.1111/j.1600-0765.2012.01503.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
BACKGROUND AND OBJECTIVE During periodontitis or orthodontic tooth movement, the periodontal vasculature is severely impaired by chronic inflammation or excessive mechanical force. This leads to a hypoxic microenvironment of the periodontal cells and enhances the expression of various cytokines and growth factors that may regulate angiogenesis and alveolar bone remodeling. However, the role of hypoxia in regulating the communication between endothelial cells (ECs) and osteoblast progenitors during the remodeling and repair of periodontal tissue is still poorly defined. The aim of this study was to investigate the effects of vascular ECs on osteogenic differentiation, mineralization and the paracrine function of noncontact co-cultured periodontal ligament stem cells (PDLSCs) under hypoxia, and further reveal the involvement of MEK/ERK and p38 MAPK pathways in the process. MATERIAL AND METHODS First, PDLSCs were obtained and a noncontact co-culture system of PDLSCs and human umbilical vein endothelial cells was established. Second, the effects of different time-periods of hypoxia (2% O(2) ) on the osteogenic potential, mineralization and paracrine function of co-cultured PDLSCs were investigated. Third, ERK1/2 and p38 MAPK activities of PDLSCs under hypoxia were measured by western blotting. Finally, we employed specific MAPK inhibitors (PD98059 and SB20350) to investigate the involvement of ERK1/2 and p38 MAPK in PDLSC osteogenesis under hypoxia. RESULTS We observed further increased osteogenic differentiation of co-cultured PDLSCs, manifested by markedly enhanced alkaline phosphatase (ALP) activity and prostaglandin E(2) (PGE(2)) levels, vascular endothelial growth factor (VEGF) release, runt-related transcription factor 2 (Runx2) and Sp7 transcriptional and protein levels and mineralized nodule formation, compared with PDLSCs cultured alone. ERK1/2 was phosphorylated in a rapid but transient manner, whereas p38 MAPK was activated in a slow and sustained way under hypoxia. Furthermore, hypoxia-stimulated transcription and expression of osteogenic regulators (hypoxia-inducible factor-1α, ALP, Runx2, Sp7, PGE(2) and VEGF) were also inhibited by PD98059 and SB203580 to different degrees. CONCLUSION Further increased osteogenic differentiation and mineralization of co-cultured PDLSCs under hypoxia were regulated by MEK/ERK and p38 MAPK pathways. And the ECs-mediated paracrine of PGE(2) and VEGF may facilitate the unidirectional PDLSC-EC communication and promote PDLSCs osteogenesis.
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Affiliation(s)
- Y Wu
- State Key Laboratory of Oral Diseases, Department of Orthodontics, West China College of Stomatology, Sichuan University, Chengdu, China.
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Wang JR, Zhou Y, Sang K, Li MX. [Association between pulmonary vascular remodeling and expression of hypoxia-inducible factor-1α, endothelin-1 and inducible nitric oxide synthase in pulmonary vessels in neonatal rats with hypoxic pulmonary hypertension]. Zhongguo Dang Dai Er Ke Za Zhi 2013; 15:138-144. [PMID: 23428131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
OBJECTIVE To investigate the association between pulmonary vascular remodeling and expression of hypoxia-inducible factor-1α (HIF-1α), endothelin-1 (ET-1) and inducible nitric oxide synthase (iNOS) in pulmonary vessels in neonatal rats with hypoxic pulmonary hypertension (HPH). METHODS A neonatal rat model of HPH was established as an HPH group, and normal neonatal rats were enrolled as a control group. The mean pulmonary arterial pressure (mPAP) was measured. The percentage of medial thickness to outer diameter of the small pulmonary arteries (MT%) and the percentage of medial cross-section area to total cross-section area of the pulmonary small arteries (MA%) were measured as the indicators for pulmonary vascular remodeling. The immunohistochemical reaction intensities for HIF-1α, ET-1 and iNOS and their mRNA expression in lung tissues of neonatal rats were measured. Correlation analysis was performed to determine the relationship between pulmonary vascular remodeling and mRNA expression of HIF-1α, ET-1 and iNOS. RESULTS The mPAP of the HPH group kept increasing on days 3, 5, 7, 10, 14, and 21 of hypoxia, with a significant difference compared with the control group (P<0.05). The HPH group had significantly higher MT% and MA% than the control group from day 7 of hypoxia (P<0.05). HIF-1α protein expression increased significantly on days 3, 5, 7 and 10 days of hypoxia, and HIF-1α mRNA expression increased significantly on days 3, 5 and 7 days of hypoxia in the HPH group compared with the control group (P<0.05). ET-1 protein expression increased significantly on days 3, 5 and 7 days of hypoxia and ET-1 mRNA expression increased significantly on day 3 of hypoxia in the HPH group compared with the control group (P<0.05). Both iNOS protein and mRNA expression were significantly higher on days 3, 5 and 7 days of hypoxia than the control group (P<0.05). Both MT% and MA% were positively correlated with HIF-1α mRNA expression (r=0.835 and 0.850 respectively; P<0.05). CONCLUSIONS Pulmonary vascular remodeling is developed on day 7 of hypoxia in neonatal rats. HIF-1α, ET-1 and iNOS are all involved in the occurrence and development of HPH in neonatal rats.
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Affiliation(s)
- Jian-Rong Wang
- Department of Neonatology, First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
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Xu Z, Chen X, Peng C, Liu E, Li Y, Li C, Niu J. The expression and clinical significance of Omi/Htra2 in hepatocellular carcinoma. Hepatogastroenterology 2013; 60:6-13. [PMID: 23682386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND/AIMS To investigate Omi/HtrA2 expression and its clinical significance in hepatocellular carcinoma. METHODOLOGY We analyzed Omi/HtrA2 expression in hepatocellular carcinoma, paracancerous tissues and normal hepatic tissues by immunohistochemistry, RT-PCR and Western blot. Hypoxia-inducible factor-1α (HIF-1α) expression was also detected in hepatocellular carcinoma samples by immunohistochemistry. Meanwhile, we retrospectively analyzed the relationship between Omi/HtrA2 expression and the survival times of the patients. RESULTS We found that Omi/HtrA2 overexpressed in hepatocellular carcinoma and was correlated with hepatocellular carcinoma differentiation, tumor size, portal vein invasion, clinical stage and lymph node metastasis. We also observed a significant inverse correlation between the expression of Omi,/HtrA2 and HIF-1α in hepatocellular carcinoma. The Kaplan-Meier estimates showed that patients who were Omi/HtrA2 positive had much longer survival times than those who were Omi/HtrA2 negative. Both univariate and multivariate analysis using the Cox regression model indicated that Omi/HtrA2 expression was a significant factor for prognosis. CONCLUSIONS Hepatocellular carcinoma cells may need Omi/HtrA2 expression for apoptosis and Omi/HtrA2 might be an important prognostic marker for primary hepatocellular carcinoma.
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Affiliation(s)
- Zongquan Xu
- Hepatobiliary Surgery, Qilu Hospital, ShanDong University, Jinan, China
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Zhang Q, Gao WY, Zhang Y, Chen BY, Chen Z, Zhang WS, Man SL. Protective effects of astragalus extract against intermittent hypoxia-induced hippocampal neurons impairment in rats. Chin Med J (Engl) 2013; 126:1551-1554. [PMID: 23595393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023] Open
Abstract
BACKGROUND Intermittent hypoxia is the main pathophysiological cause of the obstructive sleep apnea syndrome. Astragalus shows improvement of spatial learning and memory abilities under intermittent hypoxia. Our study aimed to investigate the protective effect of astragalus against intermittent hypoxia induced-hippocampal neurons impairment in rats and lay the theoretical foundation for the sleep apnea improvement in cognitive function by astragalus. METHODS Male Wistar rats were divided into 4 groups: blank control group, normoxia group, intermittent hypoxia group and astragalus treated intermittent hypoxia group. After 6-week treatment, apoptosis of neurons was evaluated by terminal deoxynucleotidyl-transferase-mediated dUTP nick end-labeling (TUNEL) assay. Furthermore, the expression of HIF-1a was detected by real-time reverse transcription polymerase chain reaction (RT-PCR) at the mRNA level as well as by immunohistochemistry (IHC) and Western blotting at the protein level. RESULTS HPLC analysis indicated that astragaloside IV, astragaloside II and astragaloside I were the main compounds in astragals extract. Astragalus extract reduced the apoptosis of hippocampal neurons (P < 0.05) and decreased the expression of HIF-1a at both the mRNA and protein levels in hippocampus compared with non-treated groups (P < 0.05). CONCLUSION Astragalus protects against intermittent hypoxia-induced hippocampal neurons impairment in rats.
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Affiliation(s)
- Qiang Zhang
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, China; Tianjin Institute of Geriatrics, Tianjin Medical University General Hospital, Tianjin 300052, China
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Alvarez de Eulate-Beramendi S, Alvarez-Vega MA, Antuna-Ramos A, Pina-Batista K, Jimenez-Duarte JM, Gutierrez-Morales J, Astudillo-Gonzalez A. [Pathogenetic bases of epileptogenesis in cerebral cavernomas]. Rev Neurol 2012; 55:718-724. [PMID: 23233139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
INTRODUCTION. Brain cavernoma are a type of arteriovenous malformation that clinically presenting seizures, neurological deficit or bleeding. Hypoxia, neoangiogenesis and metalloproteasas seems to be involved in seizures physiopathology. Our study aims to assess this potential relation by immunohistochemical methods, analyzing hypoxia inducible factor (HIF-1alpha) and metalloproteasa (MMP-9) in tissue surrounding cavernoma. PATIENTS AND METHODS. We selected 17 consecutive cases anatomopathologically diagnosed as cavernoma during 9 years. Immunohistochemical staining was performed for HIF-1alpha and MMP-9. We evaluated the relation between seizures and the scale of uptake of different tissues surrounding cavernoma. RESULTS. Cases with seizures had HIF-1alpha positive uptake in vascular endothelium in 31%, 17% in fibrous tissue and 34% in inflammatory tissue. Besides, it also shows MMP-9 positive uptake in vascular endothelium in 86%, 100% in fibrous tissue and 43% of brain tissue. Statistical analysis by chi-square and odds ratio shows a positive trend towards seizures and the presence of HIF-1alpha and MMP-9 in vascular tissue, fibrous tissue and brain tissue, but no for inflammatory tissue. CONCLUSION. HIF-1alpha and MMP-9, valued by immunohistochemical methods, are related to complications as seizures.
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Palladino MA, Shah A, Tyson R, Horvath J, Dugan C, Karpodinis M. Myeloid cell leukemia-1 (Mc1-1) is a candidate target gene of hypoxia-inducible factor-1 (HIF-1) in the testis. Reprod Biol Endocrinol 2012; 10:104. [PMID: 23216940 PMCID: PMC3556106 DOI: 10.1186/1477-7827-10-104] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2012] [Accepted: 11/27/2012] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Spermatic cord torsion can lead to testis ischemia (I) and subsequent ischemia-reperfusion (I/R) causing germ cell-specific apoptosis. Previously, we demonstrated that the hypoxia-inducible factor-1 (HIF-1) transcription factor, a key regulator of physiological responses to hypoxia, is abundant in Leydig cells in normoxic and ischemic testes. We hypothesize that testicular HIF-1 activates the expression of antiapoptotic target genes to protect Leydig cells from apoptosis. In silico analysis of testis genes containing a consensus hypoxia response element (HRE, 5'-RCGTG-3') identified myeloid cell leukemia-1 (Mcl-1) as a potential HIF-1 target gene. The purpose of this study was to determine whether HIF-1 shows DNA-binding activity in normoxic and ischemic testes and whether Mcl-1 is a target gene of testicular HIF-1. METHODS The testicular HIF-1 DNA-binding capacity was analyzed in vitro using a quantitative enzyme-linked immunosorbent assay (ELISA) and electrophoretic mobility shift assays (EMSA). MCL-1 protein expression was evaluated by immunoblot analysis and immunohistochemistry. The binding of testicular HIF-1 to the Mcl-1 gene was examined via chromatin immunoprecipitation (ChIP) analysis. RESULTS The ELISA and EMSA assays demonstrated that testicular HIF-1 from normoxic and ischemic testes binds DNA equally strongly, suggesting physiological roles for HIF-1 in the normoxic testis, unlike most tissues in which HIF-1 is degraded under normoxic conditions and is only activated by hypoxia. MCL-1 protein was determined to be abundant in both normoxic and ischemic testes and expressed in Leydig cells. In a pattern identical to that of HIF-1 expression, the steady-state levels of MCL-1 were not significantly affected by I or I/R and MCL-1 co-localized with HIF-1α in Leydig cells. Chromatin immunoprecipitation (ChIP) analysis using a HIF-1 antibody revealed sequences enriched for the Mcl-1 promoter. CONCLUSIONS The results demonstrated that, unlike what is observed in most tissues, HIF-1 displays DNA-binding activity in both normoxic and ischemic testes, and Mcl-1 may be a key target gene of testicular HIF-1 with potential roles in the antiapoptotic protection of Leydig cells.
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Affiliation(s)
- Michael A Palladino
- Department of Biology, Monmouth University, 400 Cedar Avenue, West Long Branch, NJ 07764, USA.
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Karetsi E, Ioannou MG, Kerenidi T, Minas M, Molyvdas PA, Gourgoulianis KI, Paraskeva E. Differential expression of hypoxia-inducible factor 1α in non-small cell lung cancer and small cell lung cancer. Clinics (Sao Paulo) 2012; 67:1373-8. [PMID: 23295589 PMCID: PMC3521798 DOI: 10.6061/clinics/2012(12)05] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Accepted: 08/14/2012] [Indexed: 12/02/2022] Open
Abstract
OBJECTIVES The aim of this study was to compare the expression of hypoxia-inducible factor 1α and vascular endothelial growth factor in small cell lung cancer and subtypes of non-small cell lung cancer and examine their relationships with clinicopathologic factors, response to treatment and survival. METHODS We examined samples obtained by bronchial endoscopic biopsy from 55 patients with inoperable lung cancer (16 with adenocarcinoma, 17 with squamous cell carcinoma, and 22 with small cell lung cancer). Hypoxiainducible factor 1α and vascular endothelial growth factor were detected using immunohistochemistry. The diagnosis, treatment, and follow-up of patients were conducted according to the standard practice. RESULTS A significant difference (p=0.022) in hypoxia-inducible factor 1α expression was observed between nonsmall cell lung cancer (75.8% positive) and small cell lung cancer (45.5% positive). The frequency of hypoxiainducible factor 1α nuclear expression was 88.2% in squamous cell carcinoma, 62.5% in adenocarcinoma, and 45.5% in small cell lung cancer. A significant correlation was observed between hypoxia-inducible factor 1α and vascular endothelial growth factor expression (Fisher's exact test, p=0.001) when all types of lung cancer were examined, either collectively or separately. CONCLUSIONS The expression of hypoxia-inducible factor-1α differs significantly between subtypes of lung cancer. These findings could help elucidate the biology of the different types of non-operable lung carcinomas and have implications for the design of new therapeutic approaches for lung cancer.
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Affiliation(s)
- Eleni Karetsi
- Department of Respiratory Medicine, Medical School, University of Thessaly, Larissa, Greece
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da Rosa DP, Forgiarini LF, Baronio D, Feijó CA, Martinez D, Marroni NP. Simulating sleep apnea by exposure to intermittent hypoxia induces inflammation in the lung and liver. Mediators Inflamm 2012; 2012:879419. [PMID: 23226929 PMCID: PMC3513737 DOI: 10.1155/2012/879419] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2012] [Revised: 10/15/2012] [Accepted: 10/28/2012] [Indexed: 12/25/2022] Open
Abstract
Sleep apnea is a breathing disorder that results from momentary and cyclic collapse of the upper airway, leading to intermittent hypoxia (IH). IH can lead to the formation of free radicals that increase oxidative stress, and this mechanism may explain the association between central sleep apnea and nonalcoholic steatohepatitis. We assessed the level of inflammation in the lung and liver tissue from animals subjected to intermittent hypoxia and simulated sleep apnea. A total of 12 C57BL/6 mice were divided into two groups and then exposed to IH (n = 6) or a simulated IH (SIH) (n = 6) for 35 days. We observed an increase in oxidative damage and other changes to endogenous antioxidant enzymes in mice exposed to IH. Specifically, the expression of multiple transcription factors, including hypoxia inducible factor (HIF-1α), nuclear factor kappa B (NF-κB), and tumor necrosis factor (TNF-α), inducible NO synthase (iNOS), vascular endothelial growth factor (VEGF), and cleaved caspase 3 were shown to be increased in the IH group. Overall, we found that exposure to intermittent hypoxia for 35 days by simulating sleep apnea leads to oxidative stress, inflammation, and increased activity of caspase 3 in the liver and lung.
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Affiliation(s)
- Darlan Pase da Rosa
- Ciências Médicas, Programa de Pós-Graduação em Medicina, Universidade Federal do Rio Grande do Sul (UFRGS), 90035-903 Porto Alegre, RS, Brazil.
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Kaya AO, Gunel N, Benekli M, Akyurek N, Buyukberber S, Tatli H, Coskun U, Yildiz R, Yaman E, Ozturk B. Hypoxia inducible factor-1 alpha and carbonic anhydrase IX overexpression are associated with poor survival in breast cancer patients. J BUON 2012; 17:663-668. [PMID: 23335522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
PURPOSE Hypoxia is common in many solid tumors such as breast, head-neck, and soft tissue malignancies. Hypoxia causes overexpression of hypoxia inducible factor-1 alpha (HIF-1α) and carbonic anhydrase IX (CA IX) which are associated with unfavorable prognosis in breast cancer. In our study, we evaluated HIF-1α and CA IX expression in patients with breast cancer. METHODS Between June 1996 and June 2008, 111 women with breast cancer were evaluated. Estrogen receptor (ER) and progesterone receptor (PR) status and Her2/ neu expression were evaluated by immunohistochemical methods. Her-2/neu expression was also assessed by FISH method when needed. Two groups were created: ER and PR positive, Her-2/neu negative (group 1, n=56); and ER and PR negative, Her-2/neu positive (group 2, n=55). HIF-1α and CA IX expressions were investigated in both groups and results were compared. In addition, we investigated the association between HIF-1α and CA IX expressions with stage, grade, lymph node metastasis, tumor size, menopause status and survival. RESULTS Median patient age in group 1 was 52 years (range 34-77), and in group 2 47 years (range 27-83). HIF-1α expression was detected in 26 (46.4%) of group 1 and in 46 (83.6%) of group 2 patients (p=0.0001). CA IX expression was detected in 25 (46.4%) of group 1 and in 37 (67.3%) of group 2 patients (p7equals;0.0137rpar;. In group 1, median disease free survival (DFS) was 97 months and in group 2 46 months (p=0.0308). In group 1, median overall survival (OS) was 108 months and in group 2 75 months (p=0.0339). CONCLUSION HIF-1α and CA IX overexpressions are observed more often in ER and PR negative, Her-2/neu positive breast cancer and are associated with poor survival.
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Affiliation(s)
- A O Kaya
- Gazi University, School of Medicine, Department of Medical Oncology, Ankara, Turkey.
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Sun Y, Wang JR, Han XZ, Li HB, Sun LF, Chen X, Feng YZ. [Effects of budesonide on HIF-1α and VEGF expression and airway remodeling in an asthmatic mouse model]. Zhongguo Dang Dai Er Ke Za Zhi 2012; 14:622-627. [PMID: 22898286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
OBJECTIVE To study the effects of budesonide on hypoxia inducible factor 1α(HIF-1α) and vascular endothelial growth factor (VEGF) expression, angiogenesis and airway remodeling in the chronic asthmatic mouse model. METHODS Thirty female BALB/c mice were randomly divided into normal control, asthma model and treatment groups (10 in each group).The asthmatic mouse model was established via OVA challenge test. Mice in the treatment group were administered with aerosol budesonide (100 μg/kg) an hour before the OVA challenge test from the 28th day. Mice in the control group were treated with PBS instead of OVA. Hematoxylin and eosin staining was performed to observe thickness of the airway wall. Masson staining was used for examing collagen deposition of lung tissues. Angiogenesis and HIF-1α and VEGF expression were measured using immunohistochemistry and Western blot. The relationship of airway wall thickness and vessel area to HIF-1α and VEGF expression was investigated. RESULTS Vessel area, collagen deposition of lung tissues and airway wall thickness increased in the asthma model group. Levels of HIF-1α and VEGF were also elevated. Administration of budesonide significantly reduced angiogenesis, collagen deposition of lung tissues and airway wall thickening, as well as expression of HIF-1α and VEGF. The vessel area and airway wall thickness were positively correlated with expression of HIF-1α and VEGF. A positive correlation was also found between the expression of HIF-1α and VEGF. CONCLUSIONS Budesonide can decease angiogenesis and airway remodeling by inhibiting HIF-1α and VEGF expression in asthmatic mice.
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Affiliation(s)
- Yan Sun
- Department of Pediatrics, Provincial Hospital Affiliated to Shandong University, Jinan 250021, China
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