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Wu Y, Meng D, You Y, Sun R, Fu M, Yan Q, Zhang S, Fang Z, Bao J, Li Y. Hypoxia Inducible Factor-1alpha (HIF-1A) plays different roles in Gallbladder Cancer and Normal Gallbladder Tissues. J Cancer 2021; 12:827-839. [PMID: 33403040 PMCID: PMC7778542 DOI: 10.7150/jca.46749] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 10/24/2020] [Indexed: 12/30/2022] Open
Abstract
Purpose: Hypoxia-inducible factor-1alpha (HIF-1A) is a transcription factor that plays an “angiogenic switch” role especially under hypoxia microenvironment in solid tumor. However, the functions and clinical significance of HIF-1A in gallbladder cancer (GBC) are still controversial, and it has not been studied in normal gallbladder tissues. In this study, we sought to clarify the role of sub-cellular localization of HIF-1A expression in GBC and normal gallbladder tissues. Methods: The expressions of HIF-1A and CD34 in 127 GBC and 47 normal gallbladder tissues were evaluated by immunohistochemistry. Cox's proportional hazards model analysis and Kaplan-Meier method analysis were used to assess the correlations between these factors and clinicopathological features and prognosis. Results: HIF-1A was expressed in both cytoplasm and nucleus of GBC and normal control tissues, and was significantly correlated with microvessel density (MVD). GBC tissues with positive nuclear HIF-1A expression had higher MVD compared to that with positive cytoplasmic HIF-1A expression; however, in normal gallbladder tissues, samples with positive cytoplasmic HIF-1A had higher MVD compared to that with positive nuclear HIF-1A expression. Moreover, GBC with nuclear HIF-1A expression tended to be more poorly differentiated and had larger tumor size compared to that with cytoplasm HIF-1A expression. Furthermore, GBC patients with nuclear HIF-1A positive were significantly correlated with worse overall survival (OS) compared with cytoplasmic HIF-1A positive. Multivariate Cox regression analysis identified lymph node metastasis and nuclear HIF-1A expression to be independent prognostic parameter in GBC. Conclusions: Our findings provide evidence for the first time that HIF-1A is expressed in normal gallbladder tissues. Nuclear HIF-1A and cytoplasm HIF-1A plays different roles in GBC and normal gallbladder tissues.
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Affiliation(s)
- Youliang Wu
- Department of General Surgery, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, People's Republic of China
| | - Delong Meng
- Department of Molecular Biology, University of Texas Southwestern Medical Center, 6000 Harry Hines Blvd, Dallas, TX 75390, USA
| | - Yexiang You
- Department of General Surgery, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, People's Republic of China
| | - Ruochuan Sun
- Department of General Surgery, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, People's Republic of China
| | - Min Fu
- Department of General Surgery, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, People's Republic of China
| | - Qiang Yan
- Department of General Surgery, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, People's Republic of China
| | - Shangxin Zhang
- Department of General Surgery, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, People's Republic of China
| | - Zheng Fang
- Department of General Surgery, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, People's Republic of China
| | - Junjun Bao
- Department of General Surgery, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, People's Republic of China
| | - Yongxiang Li
- Department of General Surgery, the First Affiliated Hospital of Anhui Medical University, Hefei 230022, People's Republic of China
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Zhang L, Wang H, Feng M, Zhang X. Bioinformatics analysis of the expression of inducible nitric oxide synthases (iNOS/NOS2) in human glioma and its correlation with patients’ prognoses. Pteridines 2020. [DOI: 10.1515/pteridines-2020-0019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Abstract
Objective To evaluate the expression of inducible nitric oxide synthases (iNOS/NOS2) in human glioma and its correlation with patients’ prognoses.
Methods IiNOS/NOS2 expression in tumor and corresponding normal tissues of glioma patients was analyzed using the TCGA database and the online analysis tool GEPIA. The mutation statuses of iNOS/NOS2 genes were also explored in the TCGA database using cBioPortal. Co-expressed genes relevant to iNOS/NOS2 were screened by LinkedOmics. Gene ontology (GO) and KEGG pathway enrichment for iNOS/NOS2 and co-expressed genes was performed using LinkedOmics. Overall survival (OS) and disease-free survival (DFS) outcomes between iNOS/NOS2 mRNA high and low expression groups were compared using a log-rank test. Twenty-two glioma patients who underwent operation were included in the present work. A real-time PCR assay was used to detect iNOS/NOS2 mRNA expression in tumor tissue and normal brain tissue.
Results There was no statistical difference in iNOS/NOS2 mRNA expression levelss between tumor and normal tissues of glioma. A real-time PCR assay indicated that iNOS/NOS2 mRNA expression in tumor tissue and normal brain tissues were not statistical difference (p>0.05). A mutation rate of 0.8% for the iNOS/NOS2 gene was found using 1044 glioma patients from two datasets. The mutation types include deep deletion (0.4%), truncating (0.2%) and missense (0.2%). The top positive and negative co-expressed gene with iNOS/NOS2 were COL25A1 (rpearson=0.4734, p<0.05) and ALCAM (rpearson=0.4734, p<0.05), respectively. For KEGG pathway analysis, iNOS/NOS2 was mainly enriched in calcium signaling pathway, Wnt signaling pathway, GnRH signaling pathway, HIF-1 signaling pathway and pathways in cancer. The overall survival (HR=2.0, p<0.05) and disease-free survival (HR=1.6, p<0.05) values were significantly different between iNOS/NOS2 high and low expression groups.
Conclusion OS and DFS were significantly decreased in high iNOS/NOS2 mRNA expression groups. iNOS/NOS2 can be used as a poor prognostic biomarker for glioma.
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Affiliation(s)
- Liping Zhang
- Department of Neuroelectrophysiology , Tianjin Huanhu Hospital , Tianjin 300350 PR China
| | - Huanyu Wang
- Department of Neurosurgery , Tianjin Huanhu Hospital , Tianjin 300350 PR China
| | - Mei Feng
- Department of Neuroelectrophysiology , Tianjin Huanhu Hospital , Tianjin 300350 PR China
| | - Xueqing Zhang
- Department of Neuroelectrophysiology , Tianjin Huanhu Hospital , Tianjin 300350 PR China
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Machoń-Grecka A, Dobrakowski M, Kasperczyk A, Birkner E, Kasperczyk S. Angiogenesis and lead (Pb): is there a connection? Drug Chem Toxicol 2020; 45:589-593. [PMID: 32126859 DOI: 10.1080/01480545.2020.1734607] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Lead (Pb) is a toxic heavy metal ubiquitously distributed around the world, especially in industrial areas. Occupational and environmental exposures to Pb have detrimental effects on human health. Pb affects functioning of many systems of the human body, including the cardiovascular system. Angiogenesis, the process of new blood vessel formation, which makes critical contribution throughout life is deranged in various diseases. Excessive angiogenesis may result in different diseases including cancer. On the other spectrum, insufficient angiogenesis is observed in many diseases, such as atherosclerosis, hypertension, and cardiovascular disease. These disorders are also associated with occupational Pb exposure. In this paper, epidemiological and experimental studies are reviewed selectively for evidence in support of this hypothesis, that is, interactions between Pb and angiogenesis. We discuss the evidence for the possible mechanism of Pb impact on concentrations of angiogenic factors. Studies suggested that Pb exposure affects the level of angiogenic factors associated with angiogenesis regulation and promotion. Further research is needed, especially in the mechanisms in which Pb-induced vascular endothelial growth factor (VEGF) disregulation is present. We believe that characterizing the connection between Pb and angiogenesis will provide helpful information for the development of intervention strategies to reduce the adverse effects of Pb exposure.
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Affiliation(s)
- Anna Machoń-Grecka
- Department of Biochemistry, School of Medicine with the Division of Dentistry, Medical University of Silesia in Katowice, Zabrze, Poland
| | - Michał Dobrakowski
- Department of Biochemistry, School of Medicine with the Division of Dentistry, Medical University of Silesia in Katowice, Zabrze, Poland
| | - Aleksandra Kasperczyk
- Department of Biochemistry, School of Medicine with the Division of Dentistry, Medical University of Silesia in Katowice, Zabrze, Poland
| | - Ewa Birkner
- Department of Biochemistry, School of Medicine with the Division of Dentistry, Medical University of Silesia in Katowice, Zabrze, Poland
| | - Sławomir Kasperczyk
- Department of Biochemistry, School of Medicine with the Division of Dentistry, Medical University of Silesia in Katowice, Zabrze, Poland
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Tounsi N, Djerdjouri B, Bouzid C, Bentabak K. Correlation of adenosine deaminase operating under nitro-oxidative stress with tumor and vascularization in patients with advanced gallbladder carcinoma. J Appl Biomed 2019; 17:175-183. [PMID: 34907699 DOI: 10.32725/jab.2019.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 08/20/2019] [Indexed: 11/05/2022] Open
Abstract
This study investigates serum redox status and adenosine catabolism markers in relation to tumor and angiogenesis, in patients with gallbladder carcinoma (GBC). The level of adenosine deaminase (ADA) and xanthine oxidase (XO) activities, nitrites (NO2-), glutathione (GSH) and malondialdehyde (MDA) were measured in sera of 40 GBC patients and 40 healthy donors. In parallel, 15 tumors at TNM stage IV were scored for CD34 expression and microvessel density (MVD). The results showed that XO and ADA activities, nitrites and MDA levels enhanced by 1.26 (p < 0.01), 2.69, 2.0, and 3.2-fold (p < 0.001), respectively, while those of GSH decreased by 44.6% (p < 0.001). According to receiver operating characteristic (ROC) curve, the optimal cut-off for XO, ADA, MDA, GSH and nitrites were 5.41U/l, 17.02 U/l, 3.72 μM, 36.91 μM and 21.21 μM, respectively. Spearman correlation revealed that ADA activity correlated to nitrites levels (r = 0.3419, p < 0.05) and XO activity (r = 0.5487, p < 0.001). Multivariate binary logistic regression analysis revealed that MDA (OR = 5.78, p < 0.05), ADA (OR = 1.28, p < 0.001) and XO (OR = 2.81, p < 0.05) correlated positively to GBC. CD34 was up expressed in 73.3% of tumors at intermediate to high levels. Multiple regression analysis showed that ADA affected MVD (r = 0.604, p < 0.01). The results suggest that high MDA/GSH ratio is a potential biomarker of GBC. In addition, the oxidative adenosine catabolism indicated that active purine salvage pathway could support tumor progression by sustaining angiogenesis.
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Affiliation(s)
- Nabila Tounsi
- University of Sciences and Technology Houari Boumediene, Faculty of Biological Sciences, Laboratory of Cellular and Molecular Biology, Algiers, Algeria
| | - Bahia Djerdjouri
- University of Sciences and Technology Houari Boumediene, Faculty of Biological Sciences, Laboratory of Cellular and Molecular Biology, Algiers, Algeria
| | - Chafik Bouzid
- Mustapha Pacha Hospital, Public Health Center Pierre and Marie Curie, Department of Oncological Surgery A, Algiers, Algeria
| | - Kamel Bentabak
- Mustapha Pacha Hospital, Public Health Center Pierre and Marie Curie, Department of Oncological Surgery A, Algiers, Algeria
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Cheng H, Wang L, Mollica M, Re AT, Wu S, Zuo L. Nitric oxide in cancer metastasis. Cancer Lett 2014; 353:1-7. [PMID: 25079686 DOI: 10.1016/j.canlet.2014.07.014] [Citation(s) in RCA: 118] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 07/03/2014] [Accepted: 07/04/2014] [Indexed: 12/12/2022]
Abstract
Cancer metastasis is the spread and growth of tumor cells from the original neoplasm to further organs. This review analyzes the role of nitric oxide (NO), a signaling molecule, in the regulation of cancer formation, progression, and metastasis. The action of NO on cancer relies on multiple factors including cell type, metastasis stage, and organs involved. Various chemotherapy drugs cause cells to release NO, which in turn induces cytotoxic death of breast, liver, and skin tumors. However, NO has also been clinically connected to a poor cancer prognosis because of its role in angiogenesis and intravasation. This supports the claim that NO can be characterized as both pro-metastatic and anti-metastatic, depending on specific factors. The inhibition of cell proliferation and anti-apoptosis pathways by NO donors has been proposed as a novel therapy to various cancers. Studies suggest that NO-releasing non-steroidal anti-inflammatory drugs act on cancer cells in several ways that may make them ideal for cancer therapy. This review summarizes the biological significance of NO in each step of cancer metastasis, its controversial effects for cancer progression, and its therapeutic potential.
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Affiliation(s)
- Huiwen Cheng
- Department of Chemistry and Biochemistry, Ohio University, Athens, OH 45701, USA; Edison Biotechnology Institute, Konneker Research Center, Ohio University, Athens, OH 45701, USA
| | - Lei Wang
- Department of Chemistry and Biochemistry, Ohio University, Athens, OH 45701, USA; Edison Biotechnology Institute, Konneker Research Center, Ohio University, Athens, OH 45701, USA
| | - Molly Mollica
- Department of Chemistry and Biochemistry, Ohio University, Athens, OH 45701, USA; Edison Biotechnology Institute, Konneker Research Center, Ohio University, Athens, OH 45701, USA
| | - Anthony T Re
- School of Health and Rehabilitation Sciences, The Ohio State University College of Medicine, The Ohio State University, Columbus, OH 43210, USA
| | - Shiyong Wu
- Department of Chemistry and Biochemistry, Ohio University, Athens, OH 45701, USA; Edison Biotechnology Institute, Konneker Research Center, Ohio University, Athens, OH 45701, USA.
| | - Li Zuo
- School of Health and Rehabilitation Sciences, The Ohio State University College of Medicine, The Ohio State University, Columbus, OH 43210, USA.
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Li B, Gao MH, Chu XM. Molecular mechanism of a novel CD59-binding peptide sp22 induced tumor cells apoptosis. J Cell Biochem 2013; 113:3810-22. [PMID: 22821302 DOI: 10.1002/jcb.24258] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Some short peptides discovered by phage display are found to be able to inhibit cancer growth and induce cancer cell apoptosis. In this study, a novel cancer-targeting short peptide which was composed of 22 amino acids (ACHWPWCHGWHSACDLPMHPMC, abbreviated as sp22) and specifically bound to human CD59 was screened from a M13 phage display library so as to counteract tumor immune escape activity. The mechanism of exogenous sp22 peptide in inducing apoptosis of MCF-7 cells was investigated. The results suggested that sp22 could lower CD59 expression level, downregulate Bcl-2 expression, activate Fas and caspase-3, and finally increase apoptotic cell numbers of MCF-7 cells. However, sp22 had no obvious influence on normal human embryonic lung cells. In addition, the effects of endogenous sp22 gene on CD59 expression and NKM cell apoptosis were explored using the recombinant plasmid sp22-PIRES. It showed that sp22 gene was efficiently expressed in transfected NKM cells. Compared with normal NKM cells, NKM cells transfected with sp22 displayed reduced mRNA and protein expression levels of CD59, increased sensitivity to complement-mediated cytolysis, decreased cell survival ratio, changes of the expression of apoptosis associated proteins, increased number of apoptotic cells and the appearance of apoptotic morphology. The results suggested that sp22 protein could bind to CD59 and inhibit the expression of CD59. The cytolytic activity of complement on tumor cells strengthened and apoptosis signal was stepwise transferred which might be a potential way to kill tumor cells.
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Affiliation(s)
- Bing Li
- Department of Biology, Medical College of Qingdao University, Qingdao 266021, China.
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Identification of a novel short peptide seal specific to CD59 and its effect on HeLa cell growth and apoptosis. Cell Oncol (Dordr) 2012; 35:355-65. [PMID: 22945508 DOI: 10.1007/s13402-012-0096-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/31/2012] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND In the past, some small peptide ligands identified by phage display technologies have successfully been used in early cancer diagnostics and therapy. In the present study, a novel CD59-binding peptide was identified and its effect on HeLa cell growth and apoptosis was investigated. METHODS A phage display library was screened yielding a novel short peptide, sp22, that specifically binds to CD59, a protein that shows altered expression in various diseases, including cancer. The effect of ectopic sp22 administration and exogenous sp22 expression on the growth and apoptosis of HeLa cells was assessed. For the latter, we constructed and transfected a sp22-pIRES vector into HeLa cells. RESULTS Our results show that sp22 peptides can inhibit the level of CD59 mRNA expression, down-regulate Bcl-2 expression, increase Fas and caspase-3 expression, increase the level of cytolysis, and increase the apoptosis of HeLa cells. In contrast, sp22 peptides had no effect on normal human embryonic lung (HEL) cells exhibiting a relatively low CD59 expression level. Compared to untransfected HeLa cells, exogenously sp22 expressing HeLa cells showed a reduced CD59 expression, an increased complement-mediated lysis, a decreased cellular survival ratio, and an increase in apoptotic cells. CONCLUSION The newly identified sp22 peptide can, in a dose-dependent manner, inhibit CD59 expression. Concomitantly, sp22 can increase complement-mediated lysis and apoptosis signals. This information may be instrumental for the design of novel therapeutic strategies.
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Chin LC, Kumar P, Palmer JA, Rophael JA, Dolderer JH, Thomas GPL, Morrison WA, Penington AJ, Stewart AG, Mitchell GM. The influence of nitric oxide synthase 2 on cutaneous wound angiogenesis. Br J Dermatol 2012; 165:1223-35. [PMID: 21895624 DOI: 10.1111/j.1365-2133.2011.10599.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
BACKGROUND Inducible nitric oxide synthase (nitric oxide synthase 2, NOS 2) inhibition significantly suppresses chronically ischaemic skin flap survival, possibly because of reduced angiogenesis. OBJECTIVES To investigate the effect of genetic NOS 2 inhibition on cutaneous wound angiogenesis in two in vivo murine models. The impact of NOS 2 manipulation on vascular endothelial growth factor (VEGF)-A stimulated and fibroblast growth factor (FGF)-2 stimulated angiogenesis was also investigated in the Matrigel(®) plug assay. METHODS (i) Matrigel plugs/incisional wounds: two groups of NOS 2-/- mice and two groups of wild-type (WT) mice had bilateral Matrigel plugs containing 500 ng mL(-1) VEGF-A or 1000 ng mL(-1) FGF-2 injected subcutaneously in the abdomen. A 2·5 cm long dorsal incisional skin wound was created and sutured closed in the same animals. Wounds and plugs were explored at 7 or 12 days. (ii) Excisional wounds: dorsal 0·5 × 1·0 cm excisional skin wounds were created in four groups (two NOS 2-/- and two WT) and explored at 7 or 14 days. Wounds and Matrigel plugs were examined histologically and morphometrically for determination of percentage vascular volume (PVV). RESULTS The PVV in NOS 2-/- incisional wounds and excisional wounds was significantly less than in WT wounds (P = 0·05 and P < 0·001, respectively). The PVV was significantly less in VEGF-A stimulated Matrigel plugs compared with FGF-2 stimulated plugs in NOS 2-/- mice (P < 0·01), but not in WT mice. CONCLUSIONS NOS 2 is significantly involved in angiogenic signalling in healing skin wounds, particularly within the first 7 days. However, Matrigel plug vascularization suggests that the role of NOS 2 in angiogenesis is related to VEGF-A but not FGF-2 stimulated angiogenesis.
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Affiliation(s)
- L C Chin
- The O'Brien Institute and University of Melbourne, Department of Surgery at St Vincent's Hospital, 42 Fitzroy Street, Fitzroy, Vic. 3065, Australia
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Carotti S, Guarino MPL, Cicala M, Perrone G, Alloni R, Segreto F, Rabitti C, Morini S. Effect of ursodeoxycholic acid on inflammatory infiltrate in gallbladder muscle of cholesterol gallstone patients. Neurogastroenterol Motil 2010; 22:866-73, e232. [PMID: 20426797 DOI: 10.1111/j.1365-2982.2010.01510.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Reduced gallbladder (GB) contractility and chronic inflammatory changes in the mucosa have been reported in patients with cholesterol gallstones (GS). Ursodeoxycholic acid (UDCA) restores GB contractility and antagonises liver macrophage activation. In the colon, hydrophobic bile acid, not hydrophilic UDCA, induces mast cell degranulation. We studied the presence of monocyte/macrophage infiltrate, cyclooxygenase (COX)-2, inducible nitric oxide synthase (iNOS) expression, the number of total and degranulated mast cells in the GB muscle layer of cholesterol GS patients, and the effect of UDCA administration. METHODS Gallbladder tissue was obtained from cholesterol GS patients, either treated or untreated with UDCA (10 mg kg(-1) day(-1)) for 30 days prior to surgery. Gallbladders removed for neoplastic diseases, not involving GB, were evaluated for control purposes. The presence of monocytes/macrophages (CD68 positive), granulocytes, and mast cells, and the COX-2 and iNOS expression, was determined immunohistochemically. KEY RESULTS The number of CD68, granulocytes, mast cells, COX-2 and iNOS positive cells was significantly higher in the muscle layer of GS patients than in controls. Compared to untreated patients, those treated with UDCA showed significantly lower levels of CD68, COX-2 positive cells and degranulated mast cells and a lesser number of iNOS positive cells and granulocytes. CONCLUSIONS & INFERENCES An inflammatory monocyte/macrophage, mast cell and granulocyte infiltrate is present in the GB muscle layer of GS patients. Ursodeoxycholic acid decreases macrophages, degranulated mast cells and COX-2 expression. These results suggest that monocytes/macrophages and degranulating mast cells contribute to muscle cell dysfunction in cholesterol GS patients and support the anti-inflammatory effect of UDCA.
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Affiliation(s)
- S Carotti
- Department of Biomedical Research (CIR), University Campus Bio-Medico, Rome, Italy
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Woods CM, Sandstrom P, Bond M, Michael M, Svanvik J, Toouli J, Saccone GTP. Selective iNOS inhibition enhances spontaneous gallbladder motility in the Australian possum. Neurogastroenterol Motil 2007; 19:497-503. [PMID: 17564631 DOI: 10.1111/j.1365-2982.2007.00940.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Gallbladder inflammation is a common and painful disease. Inducible nitric oxide synthase (iNOS) plays a major role in inflammatory diseases, and iNOS inhibitors are being developed as therapeutic agents. Reports are inconsistent regarding iNOS expression in normal gallbladder. The aim of this study was to determine the effect of iNOS inhibition on spontaneous gallbladder motility. mRNA extracted from normal possum gallbladders was analysed by PCR. Gallbladder contractility was evaluated using a highly selective iNOS inhibitor AR-C102222AA (AR-C) in in vitro muscle strips (0.1-10 000 microm) and in vivo (0.1-30 micromol kg(-1)) experiments. Gene expression analysis revealed the presence of iNOS mRNA in normal gallbladder (n = 3). In vitro, AR-C (0.1-1000 micromol L(-1)) produced a concentration-dependent increase in spontaneous gallbladder contractile activity and basal tension (P < 0.05; n = 6). The maximum effect was a 1.8-fold increase in activity and 2.1-fold increase in basal tension. Pretreatment of muscle strips with tetrodotoxin (1 micromol L(-1)) did not block the AR-C-induced response (n = 5). In vivo, AR-C (30 micromol kg(-1), i.v.) increased gallbladder contraction frequency (P < 0.05; n = 8). These data suggest that iNOS is continually expressed in the normal gallbladder, which presumably releases low levels of nitric oxide and in turn may modulate spontaneous gallbladder motility. AR-C may be a beneficial treatment for patients suffering from acute cholecystitis.
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Affiliation(s)
- C M Woods
- Department of General and Digestive Surgery, Flinders Medical Centre, Flinders University, Adelaide, SA, Australia
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Sun WZ, Yu LB, Dong XS. Anti-angiogenic effect of nitric oxide synthase inhibitor on colorectal cancer xenografts in nude mice. Shijie Huaren Xiaohua Zazhi 2007; 15:114-117. [DOI: 10.11569/wcjd.v15.i2.114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the anti-angiogenic effect of NG-nitro-L-arginine methyl ester (L-NAME), an inhibitor of nitric oxide synthase on the growth of colorectal cancer xenografts in nude mice.
METHODS: The xenografts derived from colorectal carcinoma cells LS174 were inoculated in nude mice, and then the mice were randomly divided into group A, B, C and D, intragastrically treated with normal saline (n = 6, 0.2 mL), L-NAME (n = 6, 1.5 mg/kg), 5-fluorouracil (5-FU, n = 6, 5 mg/kg), and L-NAME plus 5-FU (L-NAME 1.5 mg/kg, 5-FU 5 mg/kg), respectively, for 2 weeks (three times per week). Tumor volume was measured in nude mice bearing xenografts. The microvessel density (MVD) was determined by immunohistochemistry, and the protein level of vascular endothelial growth factor (VEGF) was detected by Western blot.
RESULTS: The tumor inhibition rates were significantly higher in group B, C, and D than that in group A (34.1%, 46.0%, 74.1% vs 0, P < 0.01). There was significant difference between group B and D as well as between group C and D (P < 0.01). The value of MVD in group A was 28.9 ± 2.7, markedly higher than that in group B (16.2 ± 3.1) (P < 0.05). The level of VEGF protein was also decreased in group B as compared with that in group A (98.56 ± 1.76 vs 113.14 ± 2.34, P < 0.05).
CONCLUSION: L-NAME may restrain the growth of human colorectal carcinoma LS174 xenografts by inhibiting the angiogenesis in nude mice. L-NAME in combination with 5-FU may produce a synergetic effect.
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Van Buren G, Camp ER, Yang AD, Gray MJ, Fan F, Somcio R, Ellis LM. The role of nitric oxide in mediating tumour blood flow. Expert Opin Ther Targets 2006; 10:689-701. [PMID: 16981826 DOI: 10.1517/14728222.10.5.689] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Nitric oxide (NO) is a ubiquitous molecule with a myriad of physiological and pathophysiological roles. It has numerous direct and indirect effects on tumour vasculature as both a regulatory and effector molecule. NO affects tumour blood flow through its effects on tumour angiogenesis, vascular tone and vascular permeability, partly via its interaction with vascular endothelial growth factor. In this review, the authors examine the basic tenants of NO biology, the association of NO with tumour progression, and the role NO plays in mediating alterations in vascular functions in tumours.
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Affiliation(s)
- George Van Buren
- University of Texas, MD Anderson Cancer Center, Department of Surgical Oncology, Houston, TX 77230, USA
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13
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Bulut AS, Erden E, Sak SD, Doruk H, Kursun N, Dincol D. Significance of inducible nitric oxide synthase expression in benign and malignant breast epithelium: an immunohistochemical study of 151 cases. Virchows Arch 2005; 447:24-30. [PMID: 15947943 DOI: 10.1007/s00428-005-1250-2] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2004] [Accepted: 03/04/2005] [Indexed: 01/16/2023]
Abstract
The role of calcium independent inducible nitric oxide synthase (iNOS) in breast carcinoma is controversial, and the implications of iNOS expression on prognosis are not known. In this study, we aimed to investigate the significance of immunohistochemical iNOS expression in 100 invasive ductal carcinomas. In addition, 11 normal breast tissues, 20 cases of usual ductal hyperplasias (UDHs) and 20 fibroadenomas were included. We found that 78% of malignant and 75% of benign cases showed iNOS immunoreactivity. However, the intensity and the quantity of iNOS expression were significantly higher in the cancer group when compared with benign breasts (P<0.001), suggesting a role of iNOS in breast carcinogenesis. We were unable to show a correlation between iNOS expression and tumor grade, axillary lymph node status, and estrogen receptor expression. In 50 axilla negative cases having 5--12 years follow-up, disease free survival (DFS) rate was significantly lower in cases showing strong iNOS expression (P=0.05). As strong iNOS expression was correlated with short DFS, we concluded that further studies would be necessary to elucidate if iNOS expression might be a useful prognostic marker in breast carcinoma, especially in the axilla negative group.
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Affiliation(s)
- Asiye Safak Bulut
- Department of Pathology, Medical School of Ankara University, Ankara, Turkey.
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