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Nalla A, Ringholm L, Sørensen SN, Damm P, Mathiesen ER, Nielsen JH. Possible mechanisms involved in improved beta cell function in pregnant women with type 1 diabetes. Heliyon 2020; 6:e04569. [PMID: 32904239 PMCID: PMC7452446 DOI: 10.1016/j.heliyon.2020.e04569] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 06/11/2020] [Accepted: 07/23/2020] [Indexed: 12/31/2022] Open
Abstract
Pregnancy is known to be associated with an increased demand for insulin that is normally compensated by an increased beta cell mass and insulin secretion. Recent studies have suggested enhanced beta cell function during pregnancy in women with type 1 diabetes (T1D). To explore the possible mechanisms behind enhanced beta cell function during pregnancy in women with T1D we investigated the impact of circulating factors in serum from nine women from each group of pregnant women with and without T1D, after pregnancy and non-diabetic non-pregnant women on rat islet cell proliferation and apoptosis, and on T-lymphocyte activation. In addition, circulating levels of pancreatic hormones and selected cytokines and adipokines were measured. Rat islet cell proliferation was higher in serum from pregnant women with T1D (p < 0.05) compared to T1D women after pregnancy. Apoptosis in INS-1E cell was lower (p < 0.05) in serum from pregnant women with T1D compared to T1D women after pregnancy. T-lymphocyte cell (Jurkat) proliferation was reduced by serum from pregnant women without T1D only (p < 0.05). Higher C-peptide levels and lower levels of ghrelin, IL-6, MCP-1, IL-8 and adipsin were observed in pregnant women with T1D compared to T1D women after pregnancy. In conclusion, the improved beta cell function in women with T1D during pregnancy may be due to lower levels of proinflammatory cytokines and/or higher levels of pregnancy-associated growth factors.
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Affiliation(s)
- Amarnadh Nalla
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
- Corresponding author.
| | - Lene Ringholm
- Center for Pregnant Women with Diabetes, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
- Departments of Endocrinology, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Susanne Nørskov Sørensen
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Peter Damm
- Center for Pregnant Women with Diabetes, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
- Departments of Obstetrics, Rigshospitalet, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Elisabeth Reinhardt Mathiesen
- Center for Pregnant Women with Diabetes, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
- Departments of Endocrinology, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
| | - Jens Høiriis Nielsen
- Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark
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Massumi M, Pourasgari F, Nalla A, Batchuluun B, Nagy K, Neely E, Gull R, Nagy A, Wheeler MB. An Abbreviated Protocol for In Vitro Generation of Functional Human Embryonic Stem Cell-Derived Beta-Like Cells. PLoS One 2016; 11:e0164457. [PMID: 27755557 PMCID: PMC5068782 DOI: 10.1371/journal.pone.0164457] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Accepted: 09/26/2016] [Indexed: 12/28/2022] Open
Abstract
The ability to yield glucose-responsive pancreatic beta-cells from human pluripotent stem cells in vitro will facilitate the development of the cell replacement therapies for the treatment of Type 1 Diabetes. Here, through the sequential in vitro targeting of selected signaling pathways, we have developed an abbreviated five-stage protocol (25–30 days) to generate human Embryonic Stem Cell-Derived Beta-like Cells (ES-DBCs). We showed that Geltrex, as an extracellular matrix, could support the generation of ES-DBCs more efficiently than that of the previously described culture systems. The activation of FGF and Retinoic Acid along with the inhibition of BMP, SHH and TGF-beta led to the generation of 75% NKX6.1+/NGN3+ Endocrine Progenitors. The inhibition of Notch and tyrosine kinase receptor AXL, and the treatment with Exendin-4 and T3 in the final stage resulted in 35% mono-hormonal insulin positive cells, 1% insulin and glucagon positive cells and 30% insulin and NKX6.1 co-expressing cells. Functionally, ES-DBCs were responsive to high glucose in static incubation and perifusion studies, and could secrete insulin in response to successive glucose stimulations. Mitochondrial metabolic flux analyses using Seahorse demonstrated that the ES-DBCs could efficiently metabolize glucose and generate intracellular signals to trigger insulin secretion. In conclusion, targeting selected signaling pathways for 25–30 days was sufficient to generate ES-DBCs in vitro. The ability of ES-DBCs to secrete insulin in response to glucose renders them a promising model for the in vitro screening of drugs, small molecules or genes that may have potential to influence beta-cell function.
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Affiliation(s)
- Mohammad Massumi
- Departments of Medicine and Physiology, Faculty of Medicine, University of Toronto, ON, Canada.,Toronto General Hospital Research Institute, University Health Network, Toronto, ON, Canada.,Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, Canada
| | - Farzaneh Pourasgari
- Departments of Medicine and Physiology, Faculty of Medicine, University of Toronto, ON, Canada.,Toronto General Hospital Research Institute, University Health Network, Toronto, ON, Canada
| | - Amarnadh Nalla
- Departments of Medicine and Physiology, Faculty of Medicine, University of Toronto, ON, Canada.,Department of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Battsetseg Batchuluun
- Departments of Medicine and Physiology, Faculty of Medicine, University of Toronto, ON, Canada
| | - Kristina Nagy
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, Canada
| | - Eric Neely
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, Canada
| | - Rida Gull
- Departments of Medicine and Physiology, Faculty of Medicine, University of Toronto, ON, Canada
| | - Andras Nagy
- Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, ON, Canada
| | - Michael B Wheeler
- Departments of Medicine and Physiology, Faculty of Medicine, University of Toronto, ON, Canada.,Toronto General Hospital Research Institute, University Health Network, Toronto, ON, Canada
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3
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Allalou A, Nalla A, Prentice KJ, Liu Y, Zhang M, Dai FF, Ning X, Osborne LR, Cox BJ, Gunderson EP, Wheeler MB. A Predictive Metabolic Signature for the Transition From Gestational Diabetes Mellitus to Type 2 Diabetes. Diabetes 2016; 65:2529-39. [PMID: 27338739 PMCID: PMC5001181 DOI: 10.2337/db15-1720] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [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: 12/17/2015] [Accepted: 05/27/2016] [Indexed: 12/12/2022]
Abstract
Gestational diabetes mellitus (GDM) affects 3-14% of pregnancies, with 20-50% of these women progressing to type 2 diabetes (T2D) within 5 years. This study sought to develop a metabolomics signature to predict the transition from GDM to T2D. A prospective cohort of 1,035 women with GDM pregnancy were enrolled at 6-9 weeks postpartum (baseline) and were screened for T2D annually for 2 years. Of 1,010 women without T2D at baseline, 113 progressed to T2D within 2 years. T2D developed in another 17 women between 2 and 4 years. A nested case-control design used 122 incident case patients matched to non-case patients by age, prepregnancy BMI, and race/ethnicity. We conducted metabolomics with baseline fasting plasma and identified 21 metabolites that significantly differed by incident T2D status. Machine learning optimization resulted in a decision tree modeling that predicted T2D incidence with a discriminative power of 83.0% in the training set and 76.9% in an independent testing set, which is far superior to measuring fasting plasma glucose levels alone. The American Diabetes Association recommends T2D screening in the early postpartum period via oral glucose tolerance testing after GDM, which is a time-consuming and inconvenient procedure. Our metabolomics signature predicted T2D incidence from a single fasting blood sample. This study represents the first metabolomics study of the transition from GDM to T2D validated in an independent testing set, facilitating early interventions.
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Affiliation(s)
- Amina Allalou
- Department of Medicine, University of Toronto, Ontario, Canada
| | - Amarnadh Nalla
- Department of Biomedical Sciences, University of Copenhagen, Copenhagen, Denmark Department of Physiology, University of Toronto, Ontario, Canada
| | - Kacey J Prentice
- Department of Physiology, University of Toronto, Ontario, Canada
| | - Ying Liu
- Department of Physiology, University of Toronto, Ontario, Canada
| | - Ming Zhang
- Department of Physiology, University of Toronto, Ontario, Canada
| | - Feihan F Dai
- Department of Physiology, University of Toronto, Ontario, Canada
| | - Xian Ning
- Kaiser Permanente Northern California, Division of Research, Oakland, CA
| | - Lucy R Osborne
- Department of Medicine, University of Toronto, Ontario, Canada Department of Molecular Genetics, University of Toronto, Ontario, Canada
| | - Brian J Cox
- Department of Physiology, University of Toronto, Ontario, Canada Department of Obstetrics and Gynaecology, University of Toronto, Ontario, Canada
| | - Erica P Gunderson
- Kaiser Permanente Northern California, Division of Research, Oakland, CA
| | - Michael B Wheeler
- Department of Medicine, University of Toronto, Ontario, Canada Department of Physiology, University of Toronto, Ontario, Canada
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4
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Jönsson T, Memon AA, Sundquist K, Sundquist J, Olsson S, Nalla A, Bauer M, Linse S. Digested wheat gluten inhibits binding between leptin and its receptor. BMC Biochem 2015; 16:3. [PMID: 25600821 PMCID: PMC4308898 DOI: 10.1186/s12858-015-0032-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Accepted: 01/12/2015] [Indexed: 12/22/2022]
Abstract
Background Leptin resistance is considered a primary risk factor for obesity. It has been hypothesized that dietary cereal grain protein could cause leptin resistance by preventing leptin from binding to its receptor. Non-degraded dietary wheat protein has been found in human serum at a mean level of 41 ng/mL. Here, we report our findings from testing whether enzymatically digested gluten from wheat prevents leptin from binding to the leptin receptor in vitro. Gluten from wheat was digested with pepsin and trypsin under physiological conditions. Pepsin and trypsin activity was removed from the gluten digest with a 10 kDa spin-filter or by heat treatment at 100°C for 30 min. Binding to the leptin receptor of leptin mixed with gluten digest at a series of concentrations was measured using surface plasmon resonance technology. Results Binding of the gluten digest to the leptin receptor was not detected. Spin-filtered gluten digest inhibited binding of leptin to the leptin receptor, with 50% inhibition at a gluten digest concentration of ~10 ng/mL. Heat-treated gluten digest did not inhibit leptin binding. Conclusions Digested wheat gluten inhibits binding of leptin to the leptin receptor, with half-maximal inhibition at 10 ng/mL. The inhibition is significant at clinically relevant concentrations and could therefore serve as a novel pathway to investigate to understand the molecular basis of leptin resistance, obesity and associated disorders.
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Affiliation(s)
- Tommy Jönsson
- Center for Primary Health Care Research, Lund University/Region Skåne, Skåne University Hospital, Malmö, Sweden.
| | - Ashfaque A Memon
- Center for Primary Health Care Research, Lund University/Region Skåne, Skåne University Hospital, Malmö, Sweden.
| | - Kristina Sundquist
- Center for Primary Health Care Research, Lund University/Region Skåne, Skåne University Hospital, Malmö, Sweden.
| | - Jan Sundquist
- Center for Primary Health Care Research, Lund University/Region Skåne, Skåne University Hospital, Malmö, Sweden.
| | - Stefan Olsson
- Department of Plant and Environmental Science, University of Copenhagen, DK-1871, Frederiksberg C, Denmark.
| | - Amarnadh Nalla
- Institute of Biomedical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, DK-2200, Copenhagen, Denmark. .,The Danish Diabetes Academy, Odense University Hospital, Odense, Denmark.
| | - Mikael Bauer
- Department of Biochemistry and Structural Biology, Lund University, Lund, Sweden.
| | - Sara Linse
- Department of Biochemistry and Structural Biology, Lund University, Lund, Sweden.
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Nalla A, Ringholm L, Søstrup B, Højrup P, Thim L, Levery SB, Vakhrushev SY, Billestrup N, Mathiesen ER, Damm P, Nielsen JH. Implications for the offspring of circulating factors involved in beta cell adaptation in pregnancy. Acta Obstet Gynecol Scand 2014; 93:1181-9. [DOI: 10.1111/aogs.12505] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Accepted: 09/10/2014] [Indexed: 01/01/2023]
Affiliation(s)
- Amarnadh Nalla
- Department of Biomedical Sciences; Faculty of Health and Medical Sciences; University of Copenhagen; Copenhagen Denmark
- The Danish Diabetes Academy; Odense University Hospital; Odense Denmark
- Centre for Fetal Programming; Copenhagen Denmark
| | - Lene Ringholm
- Centre for Pregnant Women with Diabetes; Rigshospitalet; Faculty of Health Sciences; University of Copenhagen; Copenhagen Denmark
- Department of Endocrinology; Rigshospitalet; Faculty of Health Sciences; University of Copenhagen; Copenhagen Denmark
| | - Brigitte Søstrup
- Department of Biomedical Sciences; Faculty of Health and Medical Sciences; University of Copenhagen; Copenhagen Denmark
- Centre for Fetal Programming; Copenhagen Denmark
| | - Peter Højrup
- Department of Biochemistry and Molecular Biology; University of Southern Denmark; Odense Denmark
| | - Lars Thim
- Protein Engineering; Novo Nordisk A/S; Bagsvaerd Denmark
| | - Steven B. Levery
- Department of Cellular and Molecular Medicine; Faculty of Health and Medical Sciences; University of Copenhagen; Copenhagen Denmark
| | - Sergey Y. Vakhrushev
- Department of Cellular and Molecular Medicine; Faculty of Health and Medical Sciences; University of Copenhagen; Copenhagen Denmark
| | - Nils Billestrup
- Department of Biomedical Sciences; Faculty of Health and Medical Sciences; University of Copenhagen; Copenhagen Denmark
| | - Elisabeth R. Mathiesen
- Centre for Pregnant Women with Diabetes; Rigshospitalet; Faculty of Health Sciences; University of Copenhagen; Copenhagen Denmark
- Department of Endocrinology; Rigshospitalet; Faculty of Health Sciences; University of Copenhagen; Copenhagen Denmark
| | - Peter Damm
- Centre for Pregnant Women with Diabetes; Rigshospitalet; Faculty of Health Sciences; University of Copenhagen; Copenhagen Denmark
- Department of Obstetrics; Rigshospitalet; Faculty of Health Sciences; University of Copenhagen; Copenhagen Denmark
| | - Jens H. Nielsen
- Department of Biomedical Sciences; Faculty of Health and Medical Sciences; University of Copenhagen; Copenhagen Denmark
- Centre for Fetal Programming; Copenhagen Denmark
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Nielsen JH, Haase TN, Jaksch C, Nalla A, Søstrup B, Nalla AA, Larsen L, Rasmussen M, Dalgaard LT, Gaarn LW, Thams P, Kofod H, Billestrup N. Impact of fetal and neonatal environment on beta cell function and development of diabetes. Acta Obstet Gynecol Scand 2014; 93:1109-22. [DOI: 10.1111/aogs.12504] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 09/10/2014] [Indexed: 12/18/2022]
Affiliation(s)
- Jens H. Nielsen
- Department of Biomedical Sciences; University of Copenhagen; Copenhagen Denmark
- Center for Fetal Programming; Copenhagen Denmark
| | - Tobias N. Haase
- Department of Biomedical Sciences; University of Copenhagen; Copenhagen Denmark
- Center for Fetal Programming; Copenhagen Denmark
| | - Caroline Jaksch
- Department of Biomedical Sciences; University of Copenhagen; Copenhagen Denmark
- Center for Fetal Programming; Copenhagen Denmark
| | - Amarnadh Nalla
- Department of Biomedical Sciences; University of Copenhagen; Copenhagen Denmark
- Center for Fetal Programming; Copenhagen Denmark
| | - Birgitte Søstrup
- Department of Biomedical Sciences; University of Copenhagen; Copenhagen Denmark
- Center for Fetal Programming; Copenhagen Denmark
| | - Anjana A. Nalla
- Department of Biomedical Sciences; University of Copenhagen; Copenhagen Denmark
- Center for Fetal Programming; Copenhagen Denmark
| | - Louise Larsen
- Department of Biomedical Sciences; University of Copenhagen; Copenhagen Denmark
- Center for Fetal Programming; Copenhagen Denmark
| | - Morten Rasmussen
- Department of Biomedical Sciences; University of Copenhagen; Copenhagen Denmark
- Center for Fetal Programming; Copenhagen Denmark
- Novo Nordisk Foundation Center for Basic Metabolic Research; University of Copenhagen; Copenhagen Denmark
| | - Louise T. Dalgaard
- Department of Biomedical Sciences; University of Copenhagen; Copenhagen Denmark
- Department of Science; Roskilde University; Roskilde Denmark
| | - Louise W. Gaarn
- Department of Biomedical Sciences; University of Copenhagen; Copenhagen Denmark
- Center for Fetal Programming; Copenhagen Denmark
- Novo Nordisk; Måløv Denmark
| | - Peter Thams
- Department of Biomedical Sciences; University of Copenhagen; Copenhagen Denmark
- Center for Fetal Programming; Copenhagen Denmark
| | - Hans Kofod
- Department of Biomedical Sciences; University of Copenhagen; Copenhagen Denmark
| | - Nils Billestrup
- Department of Biomedical Sciences; University of Copenhagen; Copenhagen Denmark
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Søstrup B, Gaarn LW, Nalla A, Billestrup N, Nielsen JH. Co-ordinated regulation of neurogenin-3 expression in the maternal and fetal pancreas during pregnancy. Acta Obstet Gynecol Scand 2014; 93:1190-7. [DOI: 10.1111/aogs.12495] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2014] [Accepted: 08/28/2014] [Indexed: 12/28/2022]
Affiliation(s)
- Birgitte Søstrup
- Department of Biomedical Sciences; Cellular and Molecular Medicine Section; Faculty of Health and Medical Sciences; University of Copenhagen; Copenhagen Denmark
- Centre for Fetal Programming; Danish Research Council for Strategic Research; Copenhagen Denmark
| | - Louise W. Gaarn
- Department of Biomedical Sciences; Cellular and Molecular Medicine Section; Faculty of Health and Medical Sciences; University of Copenhagen; Copenhagen Denmark
- Centre for Fetal Programming; Danish Research Council for Strategic Research; Copenhagen Denmark
| | - Amarnadh Nalla
- Department of Biomedical Sciences; Cellular and Molecular Medicine Section; Faculty of Health and Medical Sciences; University of Copenhagen; Copenhagen Denmark
- Centre for Fetal Programming; Danish Research Council for Strategic Research; Copenhagen Denmark
- The Danish Diabetes Academy; Odense University Hospital; Odense Denmark
| | - Nils Billestrup
- Department of Biomedical Sciences; Cellular and Molecular Medicine Section; Faculty of Health and Medical Sciences; University of Copenhagen; Copenhagen Denmark
- Centre for Fetal Programming; Danish Research Council for Strategic Research; Copenhagen Denmark
| | - Jens H. Nielsen
- Department of Biomedical Sciences; Cellular and Molecular Medicine Section; Faculty of Health and Medical Sciences; University of Copenhagen; Copenhagen Denmark
- Centre for Fetal Programming; Danish Research Council for Strategic Research; Copenhagen Denmark
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Nalla A, Buch I, Hesse B. Easy and efficient (111)indium labeling of long-term stored DTPA conjugated protein. Curr Radiopharm 2013; 4:1-4. [PMID: 22191609 DOI: 10.2174/1874471011104010001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2010] [Revised: 11/12/2010] [Accepted: 11/17/2010] [Indexed: 11/22/2022]
Abstract
UNLABELLED The labelling efficiency of long-term stored DTPA-conjugates has not been reported previously even though DTPA has been in extensive use as metal chelator in the development of radiopharmaceuticals and contrast agents. DTPA is often used as a bifunctional chelating agent conjugated to tumor targeting vehicles such as monoclonal antibodies and receptor directed peptides. The purpose of this study was to monitor the labelling efficiency of a DTPA-conjugate on long-term storage using 111In-chloride at two different temperatures and incubation times for the In-labelling. METHOD Cyclic-diethylene-triamine-pentaacetic acid (cDTAP) was conjugated to a polyclonal immunoglobulin-G (IgG) in borate buffer, pH 8.2 at +4?C for 4 hours. Then the DTPA-conjugate was dialyzed against 50 mmol/l sodium citrate buffer saline, pH 6.0 and stored at -80° C in aliquots of 1 mg/0.5 ml. The DTPA-conjugate was labeled with 111In-chloride in citrate buffer, pH 6. The labelling reaction was incubated at room temperature (RT) for 30 min and at +4?C for 90 min. Determination of labelling efficiency was performed using ITLC and an instant chromatography scanner equipped with a NaI crystal. The labelling efficiency of the DTPA-conjugate was monitored every third month for 12 months. RESULTS The median labelling efficiencies varied between 92 and 96% during the whole period. The two combinations of incubation times and temperatures (30 min at RT and 90 min at +4°C) had no affect on labelling efficiency of the DTPA-conjugate, stored for 12 months. CONCLUSION Our study shows that 111In-labelling can easily be performed within 30 min at RT for thermo-stable proteins like polyclonal, DTPA-conjugated IgG stored long-term at -80°C with a high 111In-labelling efficiency.
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Affiliation(s)
- Amarnadh Nalla
- Department of Biomedical Sciences, University of Copenhagen, Denmark
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Caye-Thomasen P, Møller M, Werther K, Nalla A, Thomsen J, Bøg-Hansen T, Stangerup SE, Baandrup L, Jacobsen G, Nielsen H. Angiogenesis and Growth of Vestibular Schwannomas: Expression of VEGF, VEGFR1, and Extracellular Matrix Factors MMP-2, MMP-9, and TIMP-1. Skull Base Surg 2012. [DOI: 10.1055/s-0032-1314147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Møller MN, Werther K, Nalla A, Stangerup SE, Thomsen J, Bøg-Hansen TC, Nielsen HJ, Cayé-Thomasen P. Angiogenesis in vestibular schwannomas: expression of extracellular matrix factors MMP-2, MMP-9, and TIMP-1. Laryngoscope 2010; 120:657-62. [PMID: 20205165 DOI: 10.1002/lary.20834] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
OBJECTIVES/HYPOTHESIS Vascular endothelial growth factor (VEGF) and matrix metalloproteinases (MMPs) are potent mediators of tumor angiogenesis. It has been demonstrated that vestibular schwannoma VEGF expression correlates with tumor growth pattern, whereas knowledge on the expression of MMPs is lacking. This study targets the angiogenic process by investigation of tumor expression of MMP-2, MMP-9, and tissue inhibitors of metalloproteinase (TIMP)-1. A possible correlation with gender, patient age, symptom duration, tumor size, and the absolute and relative growth rate is explored. STUDY DESIGN Prospective vestibular schwannoma tissue sampling for ELISA and immunohistochemical determination of MMP-2, MMP-9 and TIMP-1. METHODS Thirty-four patients with a sporadic, noncystic, vestibular schwannoma were selected prospectively. Repeated, preoperative magnetic resonance imaging determined the tumor growth pattern. Following translabyrinthine resection, an enzyme-linked immunosorbent assay was used for determination of the MMP-2, MMP-9, and TIMP-1 concentration in tumor sample homogenates. Immunohistochemical labeling was performed in 12 randomly selected tumors. RESULTS : All tumor homogenates expressed measurable MMP-9, MMP-2, and TIMP-1. Immunolabeling localized MMP-9 expression to the tumor cells, whereas MMP-2 and TIMP-1 was found interstitially. A significant correlation existed between the concentration MMP-9 and absolute tumor growth rate, whereas a weak correlation occurred for the relative growth rate. CONCLUSIONS Vestibular schwannomas express MMP-2, MMP-9, and TIMP-1 and the tumor concentration of MMP-9 correlates with absolute tumor growth rate, but not with age, gender, symptom duration, or preoperative tumor size. No correlations existed between any clinical parameter and MMP-2 or TIMP-1 expression. We conclude that MMP-9 appears to be involved in the growth of vestibular schwannomas.
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Affiliation(s)
- Martin Nue Møller
- Department of Otorhinolaryngology, Head and Neck Surgery, Gentofte University Hospital, Hellerup, Denmark
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Cayé-Thomasen P, Werther K, Nalla A, Bøg-Hansen TC, Nielsen HJ, Stangerup SE, Thomsen J. VEGF and VEGF receptor-1 concentration in vestibular schwannoma homogenates correlates to tumor growth rate. Otol Neurotol 2005; 26:98-101. [PMID: 15699727 DOI: 10.1097/00129492-200501000-00017] [Citation(s) in RCA: 90] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE Vascular endothelial growth factor (VEGF) is one of the most potent mediators of angiogenesis, which is a mandatory process during tumor growth. Immunohistochemical studies have demonstrated VEGF expression in vestibular schwannomas (VS), and a semi-quantitation of staining intensity indicated a correlation between tumor growth rate and VEGF expression. The present objectives were to determine the concentration of VEGF and the high-affinity receptor VEGFR-1 in VS homogenates and to examine a possible correlation with symptom duration, tumor size, or growth rate. STUDY DESIGN, PATIENTS, AND METHODS Prospective selection of 27 patients with VS growth determined by repeated magnetic resonance imaging. Patient files were reviewed for symptom duration and all magnetic resonance images reviewed for determination of tumor size and growth rate. ELISA was used for determination of the VEGF and VEGFR-1 concentration in tumor homogenates. SETTING Tertiary University Hospital Clinic. RESULTS All tumor homogenates contained VEGF and VEGFR-1. A significant correlation existed between the concentration of both VEGF and VEGFR-1 and tumor growth rate but not symptom duration or tumor size. CONCLUSION The concentration of VEGF and VEGFR-1 in VS homogenates correlates with tumor growth rate but not with tumor size or symptom duration. We conclude that VEGF and VEGFR-1 appear to be directly involved in the growth pattern of VS.
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Affiliation(s)
- Per Cayé-Thomasen
- Department of Oto-rhino-laryngology, Head and Neck Surgery, Gentofte University Hospital of Copenhagen, Hellerup, Denmark.
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