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Rai SK, Bril F, Hatch HM, Xu Y, Shelton L, Kalavalapalli S, Click A, Lee D, Beecher C, Kirby A, Kong K, Trevino J, Jha A, Jatav S, Kriti K, Luthra S, Garrett TJ, Guingab-Cagmat J, Plant D, Bose P, Cusi K, Hromas RA, Tischler AS, Powers JF, Gupta P, Bibb J, Beuschlein F, Robledo M, Calsina B, Timmers H, Taieb D, Kroiss M, Richter S, Langton K, Eisenhofer G, Bergeron R, Pacak K, Tevosian SG, Ghayee HK. Targeting pheochromocytoma/paraganglioma with polyamine inhibitors. Metabolism 2020; 110:154297. [PMID: 32562798 PMCID: PMC7482423 DOI: 10.1016/j.metabol.2020.154297] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 06/12/2020] [Accepted: 06/17/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND Pheochromocytomas (PCCs) and paragangliomas (PGLs) are neuroendocrine tumors that are mostly benign. Metastatic disease does occur in about 10% of cases of PCC and up to 25% of PGL, and for these patients no effective therapies are available. Patients with mutations in the succinate dehydrogenase subunit B (SDHB) gene tend to have metastatic disease. We hypothesized that a down-regulation in the active succinate dehydrogenase B subunit should result in notable changes in cellular metabolic profile and could present a vulnerability point for successful pharmacological targeting. METHODS Metabolomic analysis was performed on human hPheo1 cells and shRNA SDHB knockdown hPheo1 (hPheo1 SDHB KD) cells. Additional analysis of 115 human fresh frozen samples was conducted. In vitro studies using N1,N11-diethylnorspermine (DENSPM) and N1,N12- diethylspermine (DESPM) treatments were carried out. DENSPM efficacy was assessed in human cell line derived mouse xenografts. RESULTS Components of the polyamine pathway were elevated in hPheo1 SDHB KD cells compared to wild-type cells. A similar observation was noted in SDHx PCC/PGLs tissues compared to their non-mutated counterparts. Specifically, spermidine, and spermine were significantly elevated in SDHx-mutated PCC/PGLs, with a similar trend in hPheo1 SDHB KD cells. Polyamine pathway inhibitors DENSPM and DESPM effectively inhibited growth of hPheo1 cells in vitro as well in mouse xenografts. CONCLUSIONS This study demonstrates overactive polyamine pathway in PCC/PGL with SDHB mutations. Treatment with polyamine pathway inhibitors significantly inhibited hPheo1 cell growth and led to growth suppression in xenograft mice treated with DENSPM. These studies strongly implicate the polyamine pathway in PCC/PGL pathophysiology and provide new foundation for exploring the role for polyamine analogue inhibitors in treating metastatic PCC/PGL. PRéCIS: Cell line metabolomics on hPheo1 cells and PCC/PGL tumor tissue indicate that the polyamine pathway is activated. Polyamine inhibitors in vitro and in vivo demonstrate that polyamine inhibitors are promising for malignant PCC/PGL treatment. However, further research is warranted.
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Affiliation(s)
- Sudhir Kumar Rai
- Department of Medicine, Division of Endocrinology, University of Florida, Gainesville, FL, USA
| | - Fernando Bril
- Department of Medicine, Division of Endocrinology, University of Florida and Malcom Randall VA Medical Center, Gainesville, FL, USA
| | - Heather M Hatch
- Department of Physiological Sciences, University of Florida, Gainesville, FL, USA
| | - Yiling Xu
- Department of Medicine, Division of Endocrinology, University of Florida, Gainesville, FL, USA
| | - Laura Shelton
- Scientific Project Development, Human Metabolome Technologies, Boston, MA, USA
| | - Srilaxmi Kalavalapalli
- Department of Medicine, Division of Endocrinology, University of Florida, Gainesville, FL, USA
| | - Arielle Click
- Department of Immunology, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | | | | | - Austin Kirby
- Department of Medicine, University of Texas Health Science Center, San Antonio, TX, USA
| | - Kimi Kong
- Department of Medicine, University of Texas Health Science Center, San Antonio, TX, USA
| | - Jose Trevino
- Department of Surgery, University of Florida, Gainesville, FL, USA
| | | | | | | | | | - Timothy J Garrett
- Department of Pathology, Immunology, and Laboratory Medicine, University of Florida, Gainesville, FL, USA
| | - Joy Guingab-Cagmat
- Department of Pathology, Immunology, and Laboratory Medicine, University of Florida, Gainesville, FL, USA
| | - Daniel Plant
- Department of Physiological Sciences, University of Florida, Malcom Randall VA Medical Center, Gainesville, FL, USA
| | - Prodip Bose
- Department of Physiological Sciences, University of Florida, Malcom Randall VA Medical Center, Gainesville, FL, USA
| | - Kenneth Cusi
- Department of Medicine, Division of Endocrinology, University of Florida and Malcom Randall VA Medical Center, Gainesville, FL, USA
| | - Robert A Hromas
- Department of Medicine, University of Texas Health Science Center, San Antonio, TX, USA
| | - Arthur S Tischler
- Department of Pathology and Laboratory Medicine, Tufts Medical Center, Boston, MA, USA
| | - James F Powers
- Department of Pathology and Laboratory Medicine, Tufts Medical Center, Boston, MA, USA
| | - Priyanka Gupta
- Department of Surgery, University of Alabama, Birmingham, AL, USA
| | - James Bibb
- Department of Surgery, University of Alabama, Birmingham, AL, USA
| | - Felix Beuschlein
- Klinik für Endokrinologie, Diabetologie und Klinische Ernährung, UniversitätsSpital Zurich, Zurich, Switzerland
| | - Mercedes Robledo
- Hereditary Endocrine Cancer Group, Spanish National Cancer Research Center (CNIO), and Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid, Spain
| | - Bruna Calsina
- Hereditary Endocrine Cancer Group, Spanish National Cancer Research Center (CNIO), and Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid, Spain
| | - Henri Timmers
- Department of Internal Medicine, Radboud University Medical Center, Nijmegen, Netherlands
| | - David Taieb
- Department of Nuclear Medicine, La Timone University Hospital, European Center for Research in Medical Imaging, Aix Marseille Université, Marseille, France
| | - Matthias Kroiss
- Department of Internal Medicine, Division of Endocrinology and Diabetology, University Hospital Würzburg, University of Würzburg, Würzburg, Germany
| | - Susan Richter
- Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany
| | - Katharina Langton
- Department of Medicine III, University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany
| | - Graeme Eisenhofer
- Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Department of Medicine III, University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany; Division of Clinical Neurochemistry, Institute of Clinical Chemistry and Laboratory Medicine, and Department of Medicine, Faculty of Medicine, University Hospital Carl Gustav Carus, Technische Universität Dresden, Germany
| | - Raymond Bergeron
- Department of Medicinal Chemistry, University of Florida, Gainesville, FL, USA
| | - Karel Pacak
- Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD, USA
| | - Sergei G Tevosian
- Department of Physiological Sciences, University of Florida, Gainesville, FL, USA.
| | - Hans K Ghayee
- Department of Medicine, Division of Endocrinology, University of Florida and Malcom Randall VA Medical Center, Gainesville, FL, USA.
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Schipper RG, Cuijpers VMJI, De Groot LHJM, Thio M, Verhofstad AAJ. Intracellular Localization of Ornithine Decarboxylase and Its Regulatory Protein, Antizyme-1. J Histochem Cytochem 2016; 52:1259-66. [PMID: 15385572 DOI: 10.1177/002215540405201002] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
The enzyme ornithine decarboxylase (ODC) and its regulatory protein antizyme-1 (AZ1) are key regulators in the homeostasis of polyamines. To gain more insight into the exact intracellular distribution of ODC and AZ1, we performed immunocytochemical and Green Fluorescent Protein-fluorocytochemical studies in cultured human cervix carcinoma and human prostatic carcinoma (PC-346C) cells. ODC localization patterns varied from predominantly cytoplasmic to both cytoplasmic and nuclear staining, whereas AZ1 was mostly found in the nucleus. In cells that were synchronized in the mitotic phase, localization of both ODC and AZ1 changed from perinuclear at the beginning of mitosis into nucleoplasmic at close proximity to the chromosomes during meta-, ana- and telophase. Upon completion of mitosis, localization of ODC and AZ1 was reverted back to the cytoplasm, i.e., predominantly perinuclear immediately after cytokinesis. When PC-346C cells were treated with polyamines to induce AZ1-regulated ODC degradation, ODC was predominantly found in the nucleus and colocalized with immunoreactive AZ1. A comparable accumulation of ODC and AZ1 in the nucleus was found in PC-346C cells treated with the polyamine analog SL-11093. The present study suggests that AZ1 is involved in nucleocyto-plasmic shuttling of ODC, which may be a prerequisite for ODC regulation and/or function.
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Affiliation(s)
- Raymond G Schipper
- Department of Pathology, University Medical Centre Nijmegen, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands
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Gamat M, Malinowski RL, Parkhurst LJ, Steinke LM, Marker PC. Ornithine Decarboxylase Activity Is Required for Prostatic Budding in the Developing Mouse Prostate. PLoS One 2015; 10:e0139522. [PMID: 26426536 PMCID: PMC4591331 DOI: 10.1371/journal.pone.0139522] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Accepted: 09/12/2015] [Indexed: 11/23/2022] Open
Abstract
The prostate is a male accessory sex gland that produces secretions in seminal fluid to facilitate fertilization. Prostate secretory function is dependent on androgens, although the mechanism by which androgens exert their effects is still unclear. Polyamines are small cationic molecules that play pivotal roles in DNA transcription, translation and gene regulation. The rate-limiting enzyme in polyamine biosynthesis is ornithine decarboxylase, which is encoded by the gene Odc1. Ornithine decarboxylase mRNA decreases in the prostate upon castration and increases upon administration of androgens. Furthermore, testosterone administered to castrated male mice restores prostate secretory activity, whereas administering testosterone and the ornithine decarboxylase inhibitor D,L-α-difluromethylornithine (DFMO) to castrated males does not restore prostate secretory activity, suggesting that polyamines are required for androgens to exert their effects. To date, no one has examined polyamines in prostate development, which is also androgen dependent. In this study, we showed that ornithine decarboxylase protein was expressed in the epithelium of the ventral, dorsolateral and anterior lobes of the adult mouse prostate. Ornithine decarboxylase protein was also expressed in the urogenital sinus (UGS) epithelium of the male and female embryo prior to prostate development, and expression continued in prostatic epithelial buds as they emerged from the UGS. Inhibiting ornithine decarboxylase using DFMO in UGS organ culture blocked the induction of prostatic buds by androgens, and significantly decreased expression of key prostate transcription factor, Nkx3.1, by androgens. DFMO also significantly decreased the expression of developmental regulatory gene Notch1. Other genes implicated in prostatic development including Sox9, Wif1 and Srd5a2 were unaffected by DFMO. Together these results indicate that Odc1 and polyamines are required for androgens to exert their effect in mediating prostatic bud induction, and are required for the expression of a subset of prostatic developmental regulatory genes including Notch1 and Nkx3.1.
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Affiliation(s)
- Melissa Gamat
- School of Pharmacy, University of Wisconsin-Madison, 777 Highland Avenue, Madison, WI, United States of America
| | - Rita L. Malinowski
- School of Pharmacy, University of Wisconsin-Madison, 777 Highland Avenue, Madison, WI, United States of America
| | - Linnea J. Parkhurst
- School of Pharmacy, University of Wisconsin-Madison, 777 Highland Avenue, Madison, WI, United States of America
| | - Laura M. Steinke
- School of Pharmacy, University of Wisconsin-Madison, 777 Highland Avenue, Madison, WI, United States of America
| | - Paul C. Marker
- School of Pharmacy, University of Wisconsin-Madison, 777 Highland Avenue, Madison, WI, United States of America
- * E-mail:
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Fortes AM, Costa J, Santos F, Seguí-Simarro JM, Palme K, Altabella T, Tiburcio AF, Pais MS. Arginine Decarboxylase expression, polyamines biosynthesis and reactive oxygen species during organogenic nodule formation in hop. PLANT SIGNALING & BEHAVIOR 2011; 6:258-69. [PMID: 21415599 PMCID: PMC3121987 DOI: 10.4161/psb.6.2.14503] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Revised: 12/10/2010] [Accepted: 12/16/2010] [Indexed: 05/29/2023]
Abstract
Hop (Humulus lupulus L.) is an economically important plant species used in beer production and as a health-promoting medicine. Hop internodes develop upon stress treatments organogenic nodules which can be used for genetic transformation and micropropagation. Polyamines are involved in plant development and stress responses. Arginine decarboxylase (ADC; EC 4·1.1·19) is a key enzyme involved in the biosynthesis of putrescine in plants. Here we show that ADC protein was increasingly expressed at early stages of hop internode culture (12h). Protein continued accumulating until organogenic nodule formation after 28 days, decreasing thereafter. The same profile was observed for ADC transcript suggesting transcriptional regulation of ADC gene expression during morphogenesis. The highest transcript and protein levels observed after 28 days of culture were accompanied by a peak in putrescine levels. Reactive oxygen species accumulate in nodular tissues probably due to stress inherent to in vitro conditions and enhanced polyamine catabolism. Conjugated polyamines increased during plantlet regeneration from nodules suggesting their involvement in plantlet formation and/or in the control of free polyamine levels. Immunogold labeling revealed that ADC is located in plastids, nucleus and cytoplasm of nodular cells. In vacuolated cells, ADC immunolabelling in plastids doubled the signal of proplastids in meristematic cells. Location of ADC in different subcellular compartments may indicate its role in metabolic pathways taking place in these compartments. Altogether these data suggest that polyamines play an important role in organogenic nodule formation and represent a progress towards understanding the role played by these growth regulators in plant morphogenesis.
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Affiliation(s)
- Ana M Fortes
- Plant Systems Biology Lab, Center for Biodiversity, Functional and Integrative Genomics (BioFIG), ICAT, FCUL, Portugal.
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Kimura Y, Tanabe M, Amano Y, Kinoshita JI, Yamada Y, Masuda Y. Basic study of the use of laser on detection of vertical root fracture. J Dent 2009; 37:909-12. [DOI: 10.1016/j.jdent.2009.07.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2009] [Revised: 07/04/2009] [Accepted: 07/13/2009] [Indexed: 01/14/2023] Open
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Hogarty MD, Norris MD, Davis K, Liu X, Evageliou NF, Hayes CS, Pawel B, Guo R, Zhao H, Sekyere E, Keating J, Thomas W, Cheng NC, Murray J, Smith J, Sutton R, Venn N, London WB, Buxton A, Gilmour SK, Marshall GM, Haber M. ODC1 is a critical determinant of MYCN oncogenesis and a therapeutic target in neuroblastoma. Cancer Res 2009; 68:9735-45. [PMID: 19047152 DOI: 10.1158/0008-5472.can-07-6866] [Citation(s) in RCA: 192] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Neuroblastoma is a frequently lethal childhood tumor in which MYC gene deregulation, commonly as MYCN amplification, portends poor outcome. Identifying the requisite biopathways downstream of MYC may provide therapeutic opportunities. We used transcriptome analyses to show that MYCN-amplified neuroblastomas have coordinately deregulated myriad polyamine enzymes (including ODC1, SRM, SMS, AMD1, OAZ2, and SMOX) to enhance polyamine biosynthesis. High-risk tumors without MYCN amplification also overexpress ODC1, the rate-limiting enzyme in polyamine biosynthesis, when compared with lower-risk tumors, suggesting that this pathway may be pivotal. Indeed, elevated ODC1 (independent of MYCN amplification) was associated with reduced survival in a large independent neuroblastoma cohort. As polyamines are essential for cell survival and linked to cancer progression, we studied polyamine antagonism to test for metabolic dependence on this pathway in neuroblastoma. The Odc inhibitor alpha-difluoromethylornithine (DFMO) inhibited neuroblast proliferation in vitro and suppressed oncogenesis in vivo. DFMO treatment of neuroblastoma-prone genetically engineered mice (TH-MYCN) extended tumor latency and survival in homozygous mice and prevented oncogenesis in hemizygous mice. In the latter, transient Odc ablation permanently prevented tumor onset consistent with a time-limited window for embryonal tumor initiation. Importantly, we show that DFMO augments antitumor efficacy of conventional cytotoxics in vivo. This work implicates polyamine biosynthesis as an arbiter of MYCN oncogenesis and shows initial efficacy for polyamine depletion strategies in neuroblastoma, a strategy that may have utility for this and other MYC-driven embryonal tumors.
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Affiliation(s)
- Michael D Hogarty
- Division of Oncology, The Children's Hospital of Philadelphia, Department of Pediatrics, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104-4318, USA.
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7
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Ehrnström RA, Bjursten LM, Ljungberg O, Veress B, Haglund ME, Lindström CG, Andersson T. Dietary supplementation with carbonate increases expression of ornithine decarboxylase and proliferation in gastric mucosa in a rat model of gastric cancer. Int J Cancer 2008; 122:727-33. [PMID: 17960625 DOI: 10.1002/ijc.23151] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Dietary factors play essential roles in gastric carcinogenesis. We recently found that dietary supplementation with NaHCO(3) significantly increased the development of gastric cancer in a rat gastric stump model. Here, we analysed nontransformed gastric mucosa for expression of the cancer-related proteins cyclooxygenase-2 (COX-2) and ornithine decarboxylase (ODC), and we examined the relationship between expression levels of those proteins and mucosal proliferation. Research has shown that COX-2 is upregulated in gastric mucosal inflammation and is strongly associated with gastrointestinal cancer. ODC is the key enzyme in polyamine synthesis and a regulator of cell proliferation. We performed gastric resections on 48 Wistar rats to induce spontaneous gastric cancer; half of these animals were given a normal diet, and the other half received a diet supplemented with NaHCO(3). Twenty-four unoperated rats served as a control group. The surgical procedure per se led to a significant rise in mucosal expression of COX-2 and an associated increase in cell proliferation. However, the COX-2 level in gastric mucosa was not further affected by dietary supplementation of carbonate. Interestingly, nontransformed gastric mucosa in the operated rats receiving a carbonate-supplemented diet showed a pronounced increase in ODC expression that was strongly correlated with a further enhanced cell proliferation. These results indicate that carbonate ions, which represent a major constituent of intestinal reflux into the stomach, increase the expression of ODC and thereby enhance cell proliferation in nontransformed mucosa, and consequently elevate the risk of gastric cancer.
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Affiliation(s)
- Roy A Ehrnström
- Division of Pathology, Department of Laboratory Medicine of Lund University, Malmö University Hospital, Malmö, Sweden.
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Gandre S, Bercovich Z, Kahana C. Mitochondrial localization of antizyme is determined by context-dependent alternative utilization of two AUG initiation codons. Mitochondrion 2005; 2:245-56. [PMID: 16120325 DOI: 10.1016/s1567-7249(02)00105-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2002] [Revised: 11/04/2002] [Accepted: 11/06/2002] [Indexed: 01/11/2023]
Abstract
Ornithine decarboxylase-antizyme (Az), a polyamine-induced protein that targets ornithine decarboxylase (ODC) to rapid degradation, is synthesized as two isoforms. Studies performed in vitro indicated that the 29 and 24.5 kDa isoforms originate from translation initiation at two alternative initiation codons. Using transient transfections we demonstrate here that also in cells the two isoforms are synthesized from two AUG codons with the second being utilized more efficiently. The more efficient utilization of the second AUG is due to its location within a better sequence context for translation initiation. By using immunostaining we demonstrate that only the less expressed long form of Az is localized in the mitochondria. Moreover, this long isoform of Az and not the more efficiently expressed short isoform is imported into mitochondria in an in vitro uptake assay. Our data therefore demonstrate that a single Az transcript gives rise to two Az proteins with different N-terminal sequence and that the longer Az form containing a potential N-terminal mitochondrial localization signal is transported to mitochondria.
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Affiliation(s)
- Shilpa Gandre
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot 76100, Israel
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Aasen T, Graham SV, Edward M, Hodgins MB. Reduced expression of multiple gap junction proteins is a feature of cervical dysplasia. Mol Cancer 2005; 4:31. [PMID: 16091133 PMCID: PMC1198252 DOI: 10.1186/1476-4598-4-31] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2005] [Accepted: 08/09/2005] [Indexed: 11/24/2022] Open
Abstract
Cervical dysplasia is a premalignant lesion associated with human papillomavirus (HPV) infection which, over time, can turn cancerous. Previous studies have indicated that loss of gap junctions may be a feature of cervical cancer and premalignant dysplasia. Loss of the gap junction protein connexin43 has been demonstrated in dysplastic cervix, but other connexins have not been investigated. In contrast we previously showed that HPV-associated cutaneous warts – and other hyperproliferative skin conditions – display a dramatic upregulation of certain connexins, in particular connexin26. By performing immunofluorescence staining after antigen retrieval of paraffin-embedded cervical tissue samples, this study reports for the first time that connexin26 and connexin30, in addition to connexin43, are expressed in differentiating cells of normal human cervical epithelia. Moreover, in dysplastic ectocervix, all connexins studied display a dramatic loss of expression compared to adjacent normal epithelia. The role of connexins in keratinocyte differentiation and carcinogenesis is discussed.
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Affiliation(s)
- Trond Aasen
- Squamous Cell Biology and Dermatology, Division of Cancer Sciences and Molecular Pathology, Robertson Building, University of Glasgow, 56 Dumbarton Road, Glasgow, G11 6NU, Scotland, UK
- Institute of Biomedical and Life Sciences, Division of Virology, University of Glasgow, Church Street, Glasgow, G11 6JR, Scotland, UK
- Centre for Cutaneous Research, Institute of Cell and Molecular Science, Queen Mary University of London, 4 Newark Street, Whitechapel, London E1 2AT, UK
| | - Sheila V Graham
- Institute of Biomedical and Life Sciences, Division of Virology, University of Glasgow, Church Street, Glasgow, G11 6JR, Scotland, UK
| | - Mike Edward
- Squamous Cell Biology and Dermatology, Division of Cancer Sciences and Molecular Pathology, Robertson Building, University of Glasgow, 56 Dumbarton Road, Glasgow, G11 6NU, Scotland, UK
| | - Malcolm B Hodgins
- Squamous Cell Biology and Dermatology, Division of Cancer Sciences and Molecular Pathology, Robertson Building, University of Glasgow, 56 Dumbarton Road, Glasgow, G11 6NU, Scotland, UK
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Mikaelian I, Nanney LB, Parman KS, Kusewitt DF, Ward JM, Näf D, Krupke DM, Eppig JT, Bult CJ, Seymour R, Ichiki T, Sundberg JP. Antibodies that label paraffin-embedded mouse tissues: a collaborative endeavor. Toxicol Pathol 2004; 32:181-91. [PMID: 15200156 DOI: 10.1080/01926230490274335] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Histology and immunohistochemistry are important tools in the study of human diseases and their respective animal models. The study of mouse models has been hampered by the absence of a large set of mouse-specific antibodies adapted to paraffin-embedded tissues. A total of 196 antibodies were tested on paraffin-embedded mouse tissues preserved in five different fixatives (Fekete's acid-alcohol-formalin, 10% neutral buffered formalin, 4% paraformaldehyde, IHC Zinc Fixative, and Bouin's fixative). The antibodies were targeted to proteins of the cytoplasm (n = 100), plasma membrane (n = 48), nucleus (n = 36), extracellular compartment (n = 5), cytoplasm/cell membrane (n = 4), and viral proteins (n = 3). A total of 83 antibodies provided an adequate signal to noise ratio. Of these, adequate labeling required heat-mediated epitope retrieval or enzymatic digestion for 32 and 8 antibodies, respectively. Epitope recognition was best for tissues fixed with Fekete's acid-alcohol-formalin. However, some proteins could be detected only in IHC Zinc Fixative, confirming that there is no single fixative suitable for the preservation of all epitopes. Four of 13 antibodies that failed to label their cellular targets on tissue sections successfully labeled whole-mount tissues, indicating that tissue processing plays an important role in epitope degradation. Regularly updated information on immunohistochemistry of normal and neoplastic mouse tissues is accessible online at (http://tumor.informatics.jax.org); links to antibody suppliers' web sites are provided.
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Affiliation(s)
- Igor Mikaelian
- The Jackson Laboratory, Bar Harbor, Maine 04609-1500, USA.
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Levillain O, Greco A, Diaz JJ, Augier R, Didier A, Kindbeiter K, Catez F, Cayre M. Influence of testosterone on regulation of ODC, antizyme, and N1-SSAT gene expression in mouse kidney. Am J Physiol Renal Physiol 2003; 285:F498-506. [PMID: 12709396 DOI: 10.1152/ajprenal.00407.2002] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Polyamines are involved in the control of the cell cycle and cell growth. In murine kidney, testosterone enhances gene expression of ornithine decarboxylase (ODC), the first enzyme in polyamine biosynthesis. In this study, we document the time course effect of testosterone on 1) gene expression of ODC, antizyme 1 (AZ1), and spermidine/spermine-N1-acetyltransferase (N1-SSAT); 2) ODC activity in proximal convoluted tubules (PCT) and cortical proximal straight tubules (CPST); and 3) renal polyamine levels. Female mice were treated with testosterone for a period of 1, 2, 3, and 5 consecutive days. ODC gene expression was extremely low in kidneys of untreated female mice compared with that of males. Consequently, the renal putrescine level was sevenfold lower in females than in males, whereas spermidine and spermine levels did not differ between sexes. In female kidneys, testosterone treatment sharply increased ODC mRNA and protein levels as well as ODC activity. Testosterone increased the expression of ODC in PCT and CPST over different time courses, which suggests that ODC activity is differentially regulated in distinct tubules. The expression of AZ1 and N1-SSAT mRNA was similar in male and female mouse kidneys. Testosterone treatment enhanced AZ1 and N1-SSAT mRNA levels in a time-dependent manner by unknown molecular mechanisms. Putrescine and spermidine levels increased after testosterone treatment in female kidneys. Surprisingly, although ODC protein and activity were undetectable in female kidneys, the levels of AZ1 mRNA and protein were similar to those in males. Therefore, one may propose that ODC protein could be continuously degraded by AZ1 in female kidneys.
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Affiliation(s)
- Olivier Levillain
- Laboratoire de Physiopathologie Métabolique et Rénale, Faculté de Médecine Lyon RTH Laënnec, Institut National de la Santé et de la Recherche Médicale, Unite 499, Lyon, France.
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Abstract
Usually, photoreceptors interact with other retinal cells through the neurotransmitter glutamate. Here we describe a nonsynaptic interaction via a secreted protein, retinoschisin. Using in situ hybridization, we found that from early postnatal life retinoschisin mRNA is present only in the outer retina of the mouse, and with single-cell RT-PCR we demonstrated its localization in rod and cone photoreceptor cells but not in Müller cells. Western blot analyses of proteins from cultured ocular tissues and microdissected outer and inner retinas, as well as from the culture media of these samples, showed that retinoschisin is secreted from the photoreceptor cells. Immunostaining of permeabilized and nonpermeabilized dissociated retinal cells revealed that retinoschisin is mainly inside and outside the photoreceptors, outside bipolar cells, and associated with plasma membranes of Müller cells and inside their distal processes. Because we showed previously that retinoschisin is distributed all over the retina, our current data suggest that after synthesis and secretion by the photoreceptors, retinoschisin reaches the surface of retinal cells and mediates interactions/adhesion between photoreceptor, bipolar, and Müller cells, contributing to the maintenance of the cytoarchitectural integrity of the retina. These interactions may not occur when the gene encoding retinoschisin is mutated, as it occurs in X-linked juvenile retinoschisis, a disease that results in morphological and electrophysiological defects of the retina.
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13
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Deng A, Munger KA, Valdivielso JM, Satriano J, Lortie M, Blantz RC, Thomson SC. Increased expression of ornithine decarboxylase in distal tubules of early diabetic rat kidneys: are polyamines paracrine hypertrophic factors? Diabetes 2003; 52:1235-9. [PMID: 12716758 DOI: 10.2337/diabetes.52.5.1235] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Polyamines are small biogenic molecules that are essential for cell cycle entry and progression and proliferation. They can also contribute to hypertrophy. The activity of ornithine decarboxylase (ODC), the rate-limiting enzyme in polyamine biosynthesis, increases in the early diabetic kidney to enable renal hypertrophy. Inhibition of ODC in early diabetes attenuates diabetic renal hypertrophy and glomerular hyperfiltration. The current studies examine the temporal profile of renal ODC protein expression and localization, intrarenal polyamine levels, and sites of proliferation in kidneys of rats during the first 7 days of streptozotocin diabetes. ODC mRNA and protein content were increased in diabetic kidneys. High-performance liquid chromatography analysis showed increased intrarenal polyamine concentrations peaking after 24 h of diabetes. A subsequent increase in the number of proliferating proximal tubular cells was detected by in vivo 5-bromodeoxyuridine (BrdU) incorporation on day 3. Surprisingly, immunohistochemical studies revealed that increased ODC protein was apparent only in distal nephrons, whereas the main site of diabetic kidney hypertrophy is the proximal tubule. These findings raise the possibility that polyamines produced in the distal nephron may mediate the early diabetic kidney growth of the proximal tubules via a paracrine mechanism.
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Affiliation(s)
- Aihua Deng
- Department of Medicine, University of California and VA San Diego Health Care System, 3350 La Jolla Village Drive, San Diego, CA 92161-9151, USA
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14
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Schipper RG, Verhofstad AAJ. Distribution patterns of ornithine decarboxylase in cells and tissues: facts, problems, and postulates. J Histochem Cytochem 2002; 50:1143-60. [PMID: 12185192 DOI: 10.1177/002215540205000901] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Ornithine decarboxylase (ODC) is a key enzyme in polyamine biosynthesis. Increased polyamine levels are required for growth, differentiation, and transformation of cells. In situ detection of ODC in cells and tissues has been performed with biochemical, enzyme cytochemical, immunocytochemical, and in situ hybridization techniques. Different localization patterns at the cellular level have been described, depending on the type of cells or tissues studied. These patterns varied from exclusively cytoplasmic to both cytoplasmic and nuclear. These discrepancies can be partially explained by the (lack of) sensitivity and/or specificity of the methods used, but it is more likely that (sub)cellular localization of ODC is cell type-specific and/or depends on the physiological status (growth, differentiation, malignant transformation, apoptosis) of cells. Intracellular translocation of ODC may be a prerequisite for its regulation and function.
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Affiliation(s)
- Raymond G Schipper
- Department of Pathology, University Medical Centre Nijmegen, Nijmegen, The Netherlands
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15
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Arteaga-Nieto P, López-Romero E, Terán-Figueroa Y, Cano-Canchola C, Luna Arias JP, Flores-Carreón A, Calvo-Méndez C. Entamoeba histolytica: purification and characterization of ornithine decarboxylase. Exp Parasitol 2002; 101:215-22. [PMID: 12594962 DOI: 10.1016/s0014-4894(02)00137-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Ornithine decarboxylase, a rate-limiting enzyme in polyamine biosynthesis in eukaryotes, was stabilized and purified from trophozoites of the parasite protozoan E. histolytica. Analytical electrophoresis revealed the presence in the purified preparations of a major polypeptide of 45 kDa and barely detectable amounts of two other proteins of 70 and 120 kDa. Both the 45 and 70 kDa polypeptides were recognized by a mouse anti-ODC monoclonal antibody. The major polypeptide exhibited amino terminal sequence homology in the range of 40-73% with ODCs from other organisms. The immunoreactive polypeptide of 70 kDa was not identified. The molecular masses of 216 and 45 kDa determined for the native enzyme by gel filtration and for the major polypeptide by SDS-PAGE, respectively, suggest that the amoeba ODC is a homopentamer. Dialysis against hydroxylamine rendered the enzyme activity fully dependent on pyridoxal 5'-phosphate (PLP). As expected for an oligomeric enzyme, ODC activity exhibited sigmoidal kinetics when it was measured as a function of increasing concentrations of L-ornithine and PLP yielding S(0.5) values of 0.45 and 0.18 mM, respectively. Purified ODC was inhibited by 1,3-diaminopropane and 2,4-diamino-2-butanone but was largely insensitive to inhibition by alpha-difluoromethylornithine (DFMO), indicating that the enzyme may not be a suitable target for this anti-parasitic drug. Other features of the amoeba ODC were common with the enzyme from prokaryotes and eucaryotes.
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Affiliation(s)
- Pablo Arteaga-Nieto
- Instituto de Investigación en Biología Experimental, Facultad de Química, Universidad de Guanajuato, Mexico
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16
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Lin CH, Vijesurier R, Ho YS, Schipper RG, Tolia V, Moshier JA, Majumdar APN. Expression of intestinal ornithine decarboxylase during postnatal development in neonatal rats. BIOCHIMICA ET BIOPHYSICA ACTA 2002; 1589:298-304. [PMID: 12031796 DOI: 10.1016/s0167-4889(02)00177-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Ornithine decarboxylase (ODC) has been shown to play an essential role in intestinal growth and maturation in rats. However, the regulatory mechanisms have not been fully elucidated. We studied the mechanisms of expression of intestinal ODC during postnatal development. Rat small intestinal mucosa was obtained from postnatal days 10, 15, 17, 19, 21, 24 and 30. Intestinal mucosa was assayed for ODC and sucrase activities. In addition, intestinal ODC mRNA, and ODC protein levels were also measured. The results showed that the intestinal sucrase activity was low before postnatal day 19. The sucrase activity then increased steadily from day 19 up to day 30. Intestinal ODC activities remained low from postnatal day 10 to day 17. A sharp increase in ODC activity was noted on day 19, which peaked on day 24 (a 20-fold increase from its low basal level) and declined on day 30. Intestinal ODC proteins followed the same pattern of postnatal expression as that of ODC activity. In contrast, ODC mRNA did not show significant change throughout the study period. The possible mechanisms by which intestinal ODC mRNA levels remain practically unchanged during postnatal development are discussed. We conclude that the ontogenic increase in sucrase activity, a marker for intestinal maturation, occurs at the same time to that of the induction of ODC activity. We also suggest that the induction of intestinal ODC activity during postnatal development is the result of post-transcriptional events or other cellular mechanisms. A better understanding of the regulation of polyamine biosynthesis during postnatal development of the small intestine will provide insights contributing to the maturation of the small intestine.
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Affiliation(s)
- Chuan-Hao Lin
- Department of Pediatrics, Division of Gastroenterology and Nutrition, Wayne State University and Children's Hospital of Michigan, 3901 Beaubien Blvd., Detroit 48201, USA.
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17
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Laube G, Bernstein HG, Wolf G, Veh RW. Differential distribution of spermidine/spermine-like immunoreactivity in neurons of the adult rat brain. J Comp Neurol 2002; 444:369-86. [PMID: 11891649 DOI: 10.1002/cne.10157] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The polyamines spermidine and spermine are small, widely distributed polycations. In the brain, they confer rectification properties upon inwardly rectifying potassium channels and Ca(2+)-permeable alpha-amino-3-hydroxy-5-methyl-4-isoxazole-propionate (AMPA)/kainate receptors and also modify functional properties of N-methyl-D-aspartate receptors. Therefore, functional roles of spermidine/spermine in the adult brain will depend on the colocalization of the spermidine/spermine-sensitive receptors/channels and the polyamines either in the same or in closely associated cell types. We previously immunocytochemically demonstrated a prominent localization of spermidine/spermine in glial cells, especially astrocytes (Laube and Veh [ 1997] Glia 19:171-179). In contrast to the commonly accepted assumption of a ubiquitous distribution of polyamines in various cell types, in neurons of the rat brain, we detected a highly diverse spermidine/spermine-like immunoreactivity. The immunoreactivity in neurons and neuropil throughout the rat brain is listed according to intensity in arbitrary groups. The strongest neuronal staining was observed in the hypothalamic paraventricular, supraoptic, and accessory neurosecretory nuclei. Strong cytoplasmic staining was also evident in some motor and somatosensory areas such as the Me5 nucleus of the mesencephalic trigeminal tract, the nucleus ruber, and the large motor neurons of the spinal cord ventral horn. In contrast, in most cortical and hippocampal regions spermidine/spermine-like immunoreactivity in neurons was relatively weak, whereas in these areas, the labeling pattern was dominated by a diffuse neuropil labeling. In addition to spermidine/spermine immunocytochemistry, ornithine decarboxylase labeling was performed and the resulting labeling patterns were compared. The prominent localization of spermidine/spermine in neurosecretory neurons might point to a functional role different from channel/receptor modification. In these neurons, polyamines might be involved in secretory processes.
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Affiliation(s)
- Gregor Laube
- Institute for Medical Neurobiology, Medical Faculty, Otto-von-Guericke University Magdeburg, 39120 Magdeburg, Germany.
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18
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Mayer G, Bendayan M. Amplification methods for the immunolocalization of rare molecules in cells and tissues. PROGRESS IN HISTOCHEMISTRY AND CYTOCHEMISTRY 2001; 36:3-85. [PMID: 11194866 DOI: 10.1016/s0079-6336(01)80002-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The needs to precisely assign macromolecules to specific locations and domains within tissues and cells and to reveal antigens which are present in low or even in trace amounts, led to the elaboration of a wide spectrum of immunocytochemical amplification procedures. These arise from the successive improvements of tissue preparation techniques, of antigen retrieval procedures and of immunological or non-immunological detection systems. Improvement of detection systems may be the most active in the development of amplification techniques. Since the early work of Coons, in which by the introduction of the indirect technique has started amplifying the signal, different systems have succeeded in increasing the sensitivity of antigens detection. Indeed, amplification techniques such as the multiple antibody layers, the multiple bridges, the enzyme complexes, the avidin-biotin, the silver intensification, and the numerous variations and combinations among these have increased the sensitivity for the detection of scarce tissue antigens. However, as shown by the recent progress carried out with new approaches such as the catalyzed reporter deposition (CARD) and the enhanced polymer one-step staining (EPOS), more efficient methods are still needed. In electron microscopy, few techniques have reached the resolution afforded by the post-embedding immunogold approach. In spite of this and in order to further increase its sensitivity, new probes and novel approaches are allowing combination of the gold marker with the amplification capacity of enzymes afforded by the CARD technique. Immunogold amplification strategies, such as the multiple incubations with the primary antibody and the use of an anti-protein A antibody have also led to enhanced signals displaying the advantages in terms of resolution and possibilities of quantification inherent to the colloidal gold marker.
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Affiliation(s)
- G Mayer
- Département de Pathologie et Biologie Cellulaire, Université de Montréal C.P. 6128, Succ. Centre-ville, Montréal, Quebec H3C 3J7, Canada.
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