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Ekström C, Ortenlöf N, Kristiansson A, Holmqvist B, Jungner Å, Vallius S, Wang X, Hellström A, Barton N, Carey G, Ley D, Gram M. Author Correction: Evaluation of recombinant human IGF-1/IGFBP-3 on intraventricular hemorrhage prevention and survival in the preterm rabbit pup model. Sci Rep 2024; 14:9423. [PMID: 38658641 PMCID: PMC11043408 DOI: 10.1038/s41598-024-60175-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024] Open
Affiliation(s)
- Claes Ekström
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Lund, Sweden
| | - Niklas Ortenlöf
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Amanda Kristiansson
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Lund, Sweden
| | | | - Åsa Jungner
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Lund, Sweden
| | - Suvi Vallius
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Xiaoyang Wang
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, Department of Obstetrics and Gynecology, University of Gothenburg, Gothenburg, Sweden
| | - Ann Hellström
- Department of Clinical Neuroscience, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Norman Barton
- Scientific Advisory Board, Oak Hill Bio Ltd, WA14 2DT, UK
| | | | - David Ley
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Lund, Sweden
| | - Magnus Gram
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Lund, Sweden.
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Ekström C, Ortenlöf N, Kristiansson A, Holmqvist B, Jungner Å, Vallius S, Wang X, Hellström A, Barton N, Carey G, Ley D, Gram M. Evaluation of recombinant human IGF-1/IGFBP-3 on intraventricular hemorrhage prevention and survival in the preterm rabbit pup model. Sci Rep 2023; 13:19847. [PMID: 37963901 PMCID: PMC10645867 DOI: 10.1038/s41598-023-46611-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 11/02/2023] [Indexed: 11/16/2023] Open
Abstract
Insulin-like growth factor-1 (IGF-1) is essential for normal brain development and regulates processes of vascular maturation. The pathogenesis of intraventricular hemorrhage (IVH) relates to the fragility of the immature capillaries in the germinal matrix, and its inability to resist fluctuations in cerebral blood flow. In this work, using different experimental setups, we aimed to (i) establish an optimal time-point for glycerol-induction of IVH in relation to time-point of recombinant human (rh) IGF-1/rhIGFBP-3 administration, and (ii) to evaluate the effects of a physiologic replacement dose of rhIGF-1/rhIGFBP-3 on prevention of IVH and survival in the preterm rabbit pup. The presence of IVH was evaluated using high-frequency ultrasound and post-mortem examinations. In the first part of the study, the highest incidence of IVH (> 60%), occurred when glycerol was administered at the earliest timepoint, e.g., 6 h after birth. At later time-points (18 and 24 h) the incidence decreased substantially. In the second part of the study, the incidence of IVH and mortality rate following rhIGF-1/rhIGFBP-3 administration was not statistically different compared to vehicle treated animals. To evaluate the importance of maintaining intrauterine serum levels of IGF-1 following preterm birth, as reported in human interventional studies, additional studies are needed to further characterize and establish the potential of rhIGF-1/rhIGFBP-3 in reducing the prevalence of IVH and improving survival in the preterm rabbit pup.
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Affiliation(s)
- Claes Ekström
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Lund, Sweden
| | - Niklas Ortenlöf
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Amanda Kristiansson
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Lund, Sweden
| | | | - Åsa Jungner
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Lund, Sweden
| | - Suvi Vallius
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Xiaoyang Wang
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, Department of Obstetrics and Gynecology, University of Gothenburg, Gothenburg, Sweden
| | - Ann Hellström
- Department of Clinical Neuroscience, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Norman Barton
- Scientific Advisory Board, Oak Hill Bio Ltd, WA14 2DT, UK
| | | | - David Ley
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Lund, Sweden
| | - Magnus Gram
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Lund, Sweden.
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Vilhelmsson Timmermand O, Safi M, Holmqvist B, Strand J. Evaluation of enhanced permeability effect and different linear energy transfer of radionuclides in a prostate cancer xenograft model. Am J Nucl Med Mol Imaging 2023; 13:147-155. [PMID: 37736493 PMCID: PMC10509292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Accepted: 07/30/2023] [Indexed: 09/23/2023]
Abstract
We have previously investigated the biodistribution and therapy effect of a humanized monoclonal antibody targeting free prostate-specific antigen (fPSA) intended for theranostics of hormone-refractory prostate cancer. In the present study, we evaluated the off-target effect and different linear energy transfer (LET) radionuclides without the effect of PSA targeting by using an antibody with the same scaffold as previously used immunoconjugates but with random, non-specific, antigen binding region. This allows us to identify alterations generated by specific targeting and those related to passive bystander effects, such as enhanced permeability and retention (EPR). A control humanized IgG monoclonal antibody (hIgG1) and an isotype control IgG monoclonal antibody were conjugated with the chelator CHX-A"-DTPA. The immunoconjugate was radiolabeled with either Lutetium-177 ([177Lu]Lu) or Indium-111 ([111In]In). A biodistribution study in mice carrying LNCaP xenografts, was performed to evaluate the non-specific uptake of [177Lu]Lu-hIgG1 in tumors and normal organs. Further, therapy studies of [177Lu]Lu and [111In]In labeled IgG were performed in BALB/c mice carrying LNCaP xenografts. Tumor tissues of treated xenografts and control were sectioned and immunohistochemically stained for Ki67 and PSA. The highest tumor uptake for the [177Lu]Lu-hIgG1 was seen at 72 hours (7.2±2 %IA/g), when comparing the tumor uptake of the fPSA targeting antibody to the non-specific antibody, the non-specific antibody contributes to half of the tumor uptake at 72 h. The liver uptake was 3.1±0.5 %IA/g at 24 h, 2.8±0.5 %IA/g at 72 h and 1.3±0.6 %IA/g at 120 h in LNCaP xenografts, which was approximately three times lower at 24 h and two times lower at 72 h than for the antibody with preserved targeting. Immunohistochemical labeling showed a reduction of PSA expression and a reduction of Ki67 labeled cells in the [111In]In treated LNCaP tumors, compared to vehicle and [177Lu]Lu treated mice. In conclusion, we found that specific targeting might negatively influence normal organ uptake when targeting secreted antigens. Furthermore, different energy deposition i.e. linear energy transfer of a radionuclide might have diverse effects on receptor expression and cell proliferation in tumors.
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Affiliation(s)
| | | | | | - Joanna Strand
- Department of Oncology, Lund UniversityLund, Sweden
- Department of Hematology, Oncology, Radiation Physics, Skåne University Hospital, Lund UniversityLund, Sweden
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Ortenlöf N, Vallius S, Karlsson H, Ekström C, Kristiansson A, Holmqvist B, Göransson O, Vaváková M, Rydén M, Carey G, Barton N, Ley D, Gram M. Characterization of choroid plexus in the preterm rabbit pup following subcutaneous administration of recombinant human IGF-1/IGFBP-3. Fluids Barriers CNS 2023; 20:59. [PMID: 37582792 PMCID: PMC10426218 DOI: 10.1186/s12987-023-00460-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 07/27/2023] [Indexed: 08/17/2023] Open
Abstract
Insulin-like growth factor-1 (IGF-1) is essential for normal brain development and regulates essential processes of vascular maturation and stabilization. Importantly, preterm birth is associated with reduced serum levels of IGF-1 as compared to in utero levels. Using a preterm rabbit pup model, we investigated the uptake of systemic recombinant human (rh) IGF-1 in complex with its main binding protein IGF-binding protein 3 (BP-3) to the brain parenchyma via the choroid plexus. Five hours after subcutaneous administration, labeled rhIGF-1/rhIGFBP-3 displayed a widespread presence in the choroid plexus of the lateral and third ventricle, however, to a less degree in the fourth, as well as in the perivascular and subarachnoid space. We found a time-dependent uptake of IGF-1 in cerebrospinal fluid, decreasing with postnatal age, and a translocation of IGF-1 through the choroid plexus. The impact of systemic rhIGF-1/rhIGFBP-3 on IGF-1 receptor activation in the choroid plexus decreased with postnatal age, correlating with IGF-1 uptake in cerebrospinal fluid. In addition, choroid plexus gene expression was observed to increase with postnatal age. Moreover, using choroid plexus in vitro cell cultures, gene expression and protein synthesis were further investigated upon rhIGF-1/rhIGFBP-3 stimulation as compared to rhIGF-1 alone, and found not to be differently altered. Here, we characterize the uptake of systemic rhIGF-1/rhIGFBP-3 to the preterm brain, and show that the interaction between systemic rhIGF-1/rhIGFBP-3 and choroid plexus varies over time.
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Affiliation(s)
- Niklas Ortenlöf
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Suvi Vallius
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Helena Karlsson
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Lund, Sweden
| | - Claes Ekström
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Lund, Sweden
| | - Amanda Kristiansson
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Lund, Sweden
| | | | - Olga Göransson
- Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Magdaléna Vaváková
- Department of Experimental Medical Science, Lund University, Lund, Sweden
| | - Martin Rydén
- Orthopaedics, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | | | - Norman Barton
- Oak Hill Bio, Scientific Advisory Board, Boston, MA, USA
| | - David Ley
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Lund, Sweden
| | - Magnus Gram
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Skåne University Hospital, Lund, Sweden.
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Christiansen LI, Ventura GC, Holmqvist B, Aasmul-Olsen K, Lindholm SEH, Lycas MD, Mori Y, Secher JBM, Burrin DG, Thymann T, Sangild PT, Pankratova S. Insulin-like growth factor 1 supplementation supports motor coordination and affects myelination in preterm pigs. Front Neurosci 2023; 17:1205819. [PMID: 37404461 PMCID: PMC10315495 DOI: 10.3389/fnins.2023.1205819] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 05/23/2023] [Indexed: 07/06/2023] Open
Abstract
Introduction Preterm infants have increased risk of impaired neurodevelopment to which reduced systemic levels of insulin-like growth factor 1 (IGF-1) in the weeks after birth may play a role. Hence, we hypothesized that postnatal IGF-1 supplementation would improve brain development in preterm pigs, used as a model for preterm infants. Methods Preterm pigs delivered by cesarean section received recombinant human IGF-1/IGF binding protein-3 complex (rhIGF-1/rhIGFBP-3, 2.25 mg/kg/day) or vehicle from birth to postnatal day 19. Motor function and cognition were assessed by monitoring of in-cage and open field activities, balance beam test, gait parameters, novel object recognition and operant conditioning tests. Collected brains were subject to magnetic resonance imaging (MRI), immunohistochemistry, gene expression analyses and protein synthesis measurements. Results The IGF-1 treatment increased cerebellar protein synthesis rates (both in vivo and ex vivo). Performance in the balance beam test was improved by IGF-1 but not in other neurofunctional tests. The treatment decreased total and relative caudate nucleus weights, without any effects to total brain weight or grey/white matter volumes. Supplementation with IGF-1 reduced myelination in caudate nucleus, cerebellum, and white matter regions and decreased hilar synapse formation, without effects to oligodendrocyte maturation or neuron differentiation. Gene expression analyses indicated enhanced maturation of the GABAergic system in the caudate nucleus (decreased NKCC1:KCC2 ratio) with limited effects in cerebellum or hippocampus. Conclusion Supplemental IGF-1 during the first three weeks after preterm birth may support motor function by enhancing GABAergic maturation in the caudate nucleus, despite reduced myelination. Supplemental IGF-1 may support postnatal brain development in preterm infants, but more studies are required to identify optimal treatment regimens for subgroups of very or extremely preterm infants.
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Affiliation(s)
- Line I. Christiansen
- Comparative Pediatrics and Nutrition, Department of Veterinary and Animals Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
| | - Gemma C. Ventura
- Comparative Pediatrics and Nutrition, Department of Veterinary and Animals Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
| | | | - Karoline Aasmul-Olsen
- Comparative Pediatrics and Nutrition, Department of Veterinary and Animals Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
| | - Sandy E. H. Lindholm
- Comparative Pediatrics and Nutrition, Department of Veterinary and Animals Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
| | - Matthew D. Lycas
- Department of Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Yuki Mori
- Center for Translational Neuromedicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jan Bojsen-Møller Secher
- Department of Veterinary Clinical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
| | - Douglas G. Burrin
- United States Department of Agriculture, Agricultural Research Service Children’s Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, United States
| | - Thomas Thymann
- Comparative Pediatrics and Nutrition, Department of Veterinary and Animals Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
| | - Per T. Sangild
- Comparative Pediatrics and Nutrition, Department of Veterinary and Animals Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
- Department of Neonatology, Rigshospitalet, Copenhagen, Denmark
- Department of Pediatrics, Odense University Hospital, Odense, Denmark
- Faculty of Theology, University of Copenhagen, Copenhagen, Denmark
| | - Stanislava Pankratova
- Comparative Pediatrics and Nutrition, Department of Veterinary and Animals Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
- Department of Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
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Christiansen LI, Holmqvist B, Pan X, Holgersen K, Lindholm SEH, Henriksen NL, Burrin DG, Ley D, Thymann T, Sangild PT, Pankratova S. Insulin-like growth factor-1 supplementation promotes brain maturation in preterm pigs. eNeuro 2023; 10:ENEURO.0430-22.2023. [PMID: 36973010 PMCID: PMC10112548 DOI: 10.1523/eneuro.0430-22.2023] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 03/15/2023] [Accepted: 03/21/2023] [Indexed: 03/29/2023] Open
Abstract
Very preterm infants show low levels of insulin-like growth factor-1 (IGF-1), which is associated with postnatal growth restriction and poor neurological outcomes. It remains unknown whether supplemental IGF-1 may stimulate neurodevelopment in preterm neonates. Using cesarean-delivered preterm pigs as a model of preterm infants, we investigated the effects of supplemental IGF-1 on motor function and regional and cellular brain development. Pigs were treated with 2.25 mg/kg/day of recombinant human IGF-1/IGF binding protein 3 complex from birth until Day 5 or 9 before collection of brain samples for quantitative immunohistochemistry (IHC), RNA-seq and qPCR analyses. Brain protein synthesis was measured using in vivo labeling with [2H5] phenylalanine. We showed that the IGF-1 receptor was widely distributed in the brain and largely coexisted with immature neurons. Region-specific quantification of IHC labeling showed that IGF-1 treatment promoted neuronal differentiation, increased subcortical myelination, and attenuated synaptogenesis in a region- and time-dependent manner. The expression levels of genes involved in neuronal and oligodendrocyte maturation, angiogenic and transport functions were altered, reflecting enhanced brain maturation in response to IGF-1 treatment. Cerebellar protein synthesis was increased by 19% at Day 5 and 14% at Day 9 after IGF-1 treatment. Treatment had no effect on Iba1-positive microglia or regional brain weights and did not affect motor development or the expression of genes related to IGF-1 signaling. In conclusion, the data show that supplemental IGF-1 promotes brain maturation in newborn preterm pigs. The results provide further support for IGF-1 supplementation therapy in the early postnatal period in preterm infants.SIGNIFICANCE STATEMENTDeficiency of systemic insulin-like growth factor-1 (IGF-1) is associated with delayed neurological development in preterm infants. Here, we show that the IGF-1 receptor is primarily expressed in immature neurons in the developing brain of the translational preterm pig model. Supplementation with IGF-1 accelerates neuron differentiation in the hippocampus and promotes myelination in subcortical white matter regions in a time-dependent way. Furthermore, systemic IGF-1 supplementation stimulates cerebral protein synthesis. Our study suggests that IGF-1 therapy in the early postnatal period might be supportive for neurodevelopment in preterm infants.
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Affiliation(s)
- Line I Christiansen
- Comparative Pediatrics and Nutrition, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, 1870, Denmark
| | - Bo Holmqvist
- ImaGene-iT AB, Medicon Village, Lund, 223 81, Sweden
| | - Xiaoyu Pan
- Comparative Pediatrics and Nutrition, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, 1870, Denmark
| | - Kristine Holgersen
- Comparative Pediatrics and Nutrition, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, 1870, Denmark
| | - Sandy E H Lindholm
- Comparative Pediatrics and Nutrition, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, 1870, Denmark
| | - Nicole L Henriksen
- Comparative Pediatrics and Nutrition, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, 1870, Denmark
| | - Douglas G Burrin
- United States Department of Agriculture/Agricultural Research Service Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA
| | - David Ley
- Department of Clinical Sciences Lund, Pediatrics, Lund University, Lund, 221 84, Sweden
| | - Thomas Thymann
- Comparative Pediatrics and Nutrition, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, 1870, Denmark
| | - Per Torp Sangild
- Comparative Pediatrics and Nutrition, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, 1870, Denmark
- Department of Neonatology, Rigshospitalet, Copenhagen, 2100, Denmark
- Department of Pediatrics, Odense University Hospital, Odense, 5000, Denmark
| | - Stanislava Pankratova
- Comparative Pediatrics and Nutrition, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, 1870, Denmark
- Department of Neuroscience, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, 2200, Denmark
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Yeung SY, Sergeeva Y, Pan G, Mittler S, Ederth T, Dam T, Jönsson P, El-Schich Z, Wingren AG, Tillo A, Hsiung Mattisson S, Holmqvist B, Stollenwerk MM, Sellergren B. Reversible Self-Assembled Monolayers with Tunable Surface Dynamics for Controlling Cell Adhesion Behavior. ACS Appl Mater Interfaces 2022; 14:41790-41799. [PMID: 36074978 PMCID: PMC9501787 DOI: 10.1021/acsami.2c12029] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 08/29/2022] [Indexed: 05/26/2023]
Abstract
Cells adhering onto surfaces sense and respond to chemical and physical surface features. The control over cell adhesion behavior influences cell migration, proliferation, and differentiation, which are important considerations in biomaterial design for cell culture, tissue engineering, and regenerative medicine. Here, we report on a supramolecular-based approach to prepare reversible self-assembled monolayers (rSAMs) with tunable lateral mobility and dynamic control over surface composition to regulate cell adhesion behavior. These layers were prepared by incubating oxoacid-terminated thiol SAMs on gold in a pH 8 HEPES buffer solution containing different mole fractions of ω-(ethylene glycol)2-4- and ω-(GRGDS)-, α-benzamidino bolaamphiphiles. Cell shape and morphology were influenced by the strength of the interactions between the amidine-functionalized amphiphiles and the oxoacid of the underlying SAMs. Dynamic control over surface composition, achieved by the addition of inert filler amphiphiles to the RGD-functionalized rSAMs, reversed the cell adhesion process. In summary, rSAMs featuring mobile bioactive ligands offer unique capabilities to influence and control cell adhesion behavior, suggesting a broad use in biomaterial design, tissue engineering, and regenerative medicine.
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Affiliation(s)
- Sing Yee Yeung
- Department
of Biomedical Sciences and Biofilms-Research Center for Biointerfaces
(BRCB), Faculty of Health and Society, Malmö
University, 205 06 Malmö, Sweden
| | - Yulia Sergeeva
- Department
of Biomedical Sciences and Biofilms-Research Center for Biointerfaces
(BRCB), Faculty of Health and Society, Malmö
University, 205 06 Malmö, Sweden
| | - Guoqing Pan
- Department
of Biomedical Sciences and Biofilms-Research Center for Biointerfaces
(BRCB), Faculty of Health and Society, Malmö
University, 205 06 Malmö, Sweden
- Institute
for Advanced Materials, School of Materials Science and Engineering, Jiangsu University, Zhenjiang, Jiangsu 212
013, China
| | - Silvia Mittler
- Department
of Physics and Astronomy, University of
Western Ontario, 1151 Richmond Street, London, Ontario, Canada N6A 3K7
| | - Thomas Ederth
- Division
of Biophysics and Bioengineering, Department of Physics, Chemistry
and Biology (IFM), Linköping University, 581 83 Linköping, Sweden
| | - Tommy Dam
- Division
of Physical Chemistry, Department of Chemistry, Lund University, 221 00 Lund, Sweden
| | - Peter Jönsson
- Division
of Physical Chemistry, Department of Chemistry, Lund University, 221 00 Lund, Sweden
| | - Zahra El-Schich
- Department
of Biomedical Sciences and Biofilms-Research Center for Biointerfaces
(BRCB), Faculty of Health and Society, Malmö
University, 205 06 Malmö, Sweden
| | - Anette Gjörloff Wingren
- Department
of Biomedical Sciences and Biofilms-Research Center for Biointerfaces
(BRCB), Faculty of Health and Society, Malmö
University, 205 06 Malmö, Sweden
| | - Adam Tillo
- Department
of Biomedical Sciences and Biofilms-Research Center for Biointerfaces
(BRCB), Faculty of Health and Society, Malmö
University, 205 06 Malmö, Sweden
| | | | - Bo Holmqvist
- ImaGene-iT
AB, Medicon Village,
Scheelevägen 2, 223 81 Lund, Sweden
| | - Maria M. Stollenwerk
- Department
of Biomedical Sciences and Biofilms-Research Center for Biointerfaces
(BRCB), Faculty of Health and Society, Malmö
University, 205 06 Malmö, Sweden
| | - Börje Sellergren
- Department
of Biomedical Sciences and Biofilms-Research Center for Biointerfaces
(BRCB), Faculty of Health and Society, Malmö
University, 205 06 Malmö, Sweden
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Romantsik O, Ross-Munro E, Grönlund S, Holmqvist B, Brinte A, Gerdtsson E, Vallius S, Bruschettini M, Wang X, Fleiss B, Ley D. Severe intraventricular hemorrhage causes long-lasting structural damage in a preterm rabbit pup model. Pediatr Res 2022; 92:403-414. [PMID: 35505079 PMCID: PMC9522590 DOI: 10.1038/s41390-022-02075-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 03/10/2022] [Accepted: 03/23/2022] [Indexed: 11/12/2022]
Abstract
BACKGROUND Intraventricular hemorrhage causes significant lifelong mortality and morbidity, especially in preterm born infants. Progress in finding an effective therapy is stymied by a lack of preterm animal models with long-term follow-up. This study addresses this unmet need, using an established model of preterm rabbit IVH and analyzing outcomes out to 1 month of age. METHODS Rabbit pups were delivered preterm and administered intraperitoneal injection of glycerol at 3 h of life and approximately 58% developed IVH. Neurobehavioral assessment was performed at 1 month of age followed by immunohistochemical labeling of epitopes for neurons, synapses, myelination, and interneurons, analyzed by means of digital quantitation and assessed via two-way ANOVA or Student's t test. RESULTS IVH pups had globally reduced myelin content, an aberrant cortical myelination microstructure, and thinner upper cortical layers (I-III). We also observed a lower number of parvalbumin (PV)-positive interneurons in deeper cortical layers (IV-VI) in IVH animals and reduced numbers of neurons, synapses, and microglia. However, there were no discernable changes in behaviors. CONCLUSIONS We have established in this preterm pup model that long-term changes after IVH include significant wide-ranging alterations to cortical organization and microstructure. Further work to improve the sensitivity of neurocognitive testing in this species at this age may be required. IMPACT This study uses an established animal model of preterm birth, in which the rabbit pups are truly born preterm, with reduced organ maturation and deprivation of maternally supplied trophic factors. This is the first study in preterm rabbits that explores the impacts of severe intraventricular hemorrhage beyond 14 days, out to 1 month of age. Our finding of persisting but subtle global changes including brain white and gray matter will have impact on our understanding of the best path for therapy design and interventions.
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Affiliation(s)
- Olga Romantsik
- Department of Clinical Sciences Lund, Division of Pediatrics, Lund University, Skåne University Hospital, 21185, Lund, Sweden.
| | - Emily Ross-Munro
- grid.1017.70000 0001 2163 3550School of Health and Biomedical Sciences, STEM College, RMIT University, Bundoora, 3083 VIC Australia
| | - Susanne Grönlund
- grid.4514.40000 0001 0930 2361Department of Clinical Sciences Lund, Division of Pediatrics, Lund University, Skåne University Hospital, 21185 Lund, Sweden
| | | | | | | | - Suvi Vallius
- grid.4514.40000 0001 0930 2361Department of Clinical Sciences Lund, Division of Pediatrics, Lund University, Skåne University Hospital, 21185 Lund, Sweden
| | - Matteo Bruschettini
- grid.4514.40000 0001 0930 2361Department of Clinical Sciences Lund, Division of Pediatrics, Lund University, Skåne University Hospital, 21185 Lund, Sweden
| | - Xiaoyang Wang
- grid.8761.80000 0000 9919 9582Centre of Perinatal Medicine & Health, Institute of Clinical Sciences, Department of Obstetrics and Gynecology, Sahlgrenska Academy, Gothenburg University, 40530 Gothenburg, Sweden ,grid.412719.8Henan Key Laboratory of Child Brain Injury and Pediatric Clinical Research Center, Institute of Neuroscience and Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Bobbi Fleiss
- School of Health and Biomedical Sciences, STEM College, RMIT University, Bundoora, 3083, VIC, Australia. .,Université de Paris, NeuroDiderot, Inserm, 75019, Paris, France.
| | - David Ley
- grid.4514.40000 0001 0930 2361Department of Clinical Sciences Lund, Division of Pediatrics, Lund University, Skåne University Hospital, 21185 Lund, Sweden
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Abdi K, Abramsky R, Andescavage N, Bambi J, Basu S, Bearer C, Benner EJ, Biselele T, Bliznyuk N, Breckpot J, Carey G, Chao A, Christiansen LI, Comani S, Croce P, De Vos M, Dereymaeker A, Dubois L, Eisch AJ, Epstein A, Geva N, Geva Y, Gewillig M, Gillis S, Goldberg RN, Gram M, Gregory S, Guez-Barber D, Hayakawa M, Henriksen NL, Hermans T, Hershkovitz R, Holgersen K, Holmqvist B, Jain V, Jansen K, Kandula V, Kapse K, Kawaguchi M, Khair A, Khazaei M, Kidokoro H, Kiffer FC, Kisilewicz K, Kumai S, Lacaille H, Ley D, Limperopoulos C, Lindholm SEH, Lukusa P, Lundberg R, MacFarlane P, Matak P, Mavinga L, Mayer C, Mbayabo G, Mitsumatsu T, Mubungu G, Murnick J, Nakata T, Narita H, Nataraj P, Natsume J, Naulaers G, Nikam R, Ortenlöf N, Ottolini K, Pan X, Pankratova S, Pegram K, Penn AA, Pradhan S, Raeisi K, Rickman N, Rikard B, Rotem R, Sangild PT, Sato Y, Sawamura F, Shany E, Shelef I, Shiraki A, Smets L, Sura L, Suzui R, Suzuki T, Tady BP, Taga G, Tamburro G, Thewissen L, Thompson JW, Thymann T, Tokat C, Vacher CM, Valdes C, Vallius S, Vatolin S, Watanabe H, Weintraub AY, Weiss M, Yamamoto H, Yaniv SS, Younge N, Yun S, Zappasodi F. Proceedings of the 13th International Newborn Brain Conference: Fetal and/or neonatal brain development, both normal and abnormal. J Neonatal Perinatal Med 2022; 15:411-426. [PMID: 35431185 DOI: 10.3233/npm-229002] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
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Vilhelmsson Timmermand O, Örbom A, Altai M, Zedan W, Holmqvist B, Safi M, Tran TA, Strand SE, Strand J. A Conjugation Strategy to Modulate Antigen Binding and FcRn Interaction Leads to Improved Tumor Targeting and Radioimmunotherapy Efficacy with an Antibody Targeting Prostate-Specific Antigen. Cancers (Basel) 2021; 13:cancers13143469. [PMID: 34298682 PMCID: PMC8307315 DOI: 10.3390/cancers13143469] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 04/30/2021] [Revised: 06/15/2021] [Accepted: 07/07/2021] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND The humanized monoclonal antibody (mAb) hu5A10 specifically targets and internalizes prostate cancer cells by binding to prostate specific antigen (PSA). Preclinical evaluations have shown that hu5A10 is an excellent vehicle for prostate cancer (PCa) radiotheranostics. We studied the impact of different chelates and conjugation ratios on hu5A10's target affinity, neonatal fc-receptor interaction on in vivo targeting efficacy, and possible enhanced therapeutic efficacy. METHODS In our experiment, humanized 5A10 (hu5A10) was conjugated with DOTA or DTPA at a molar ratio of 3:1, 6:1, and 12:1. Surface plasmon resonance (SPR) was used to study antigen and FcRn binding to the antibody conjugates. [111In]hu5A10 radio-immunoconjugates were administered intravenously into BALB/c mice carrying subcutaneous LNCaP xenografts. Serial Single-photon emission computed tomography (SPECT) images were obtained during the first week. Tumors were harvested and radionuclide distribution was analyzed by autoradiography along with microanatomy and immunohistochemistry. RESULTS As seen by SPR, the binding to PSA was clearly affected by the chelate-to-antibody ratio. Similarly, FcRn (neonatal fc-receptor) interacted less with antibodies conjugated at high ratios of chelator, which was more pronounced for DOTA conjugates. The autoradiography data indicated a higher distribution of radioactivity to the rim of the tumor for lower ratios and a more homogenous distribution at higher ratios. Mice injected with ratio 3:1 111In-DOTA-hu5A10 showed no significant difference in tumor volume when compared to mice given vehicle over a time period of 3 weeks. Mice given a similar injection of ratio 6:1 111In-DOTA-hu5A10 or 6:1 111In-DTPA-hu5A10 or 12:1 111In-DTPA-hu5A10 showed significant tumor growth retardation. Conclusions: The present study demonstrated that the radiolabeling strategy could positively modify the hu5A10's capacity to bind PSA and complex with the FcRn-receptor, which resulted in more homogenous activity distribution in tumors and enhanced therapy efficacy.
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Affiliation(s)
- Oskar Vilhelmsson Timmermand
- Department of Clinical Sciences Lund, Oncology, Lund University, 22243 Lund, Sweden; (O.V.T.); (A.Ö.); (M.A.); (W.Z.); (M.S.); (S.-E.S.)
| | - Anders Örbom
- Department of Clinical Sciences Lund, Oncology, Lund University, 22243 Lund, Sweden; (O.V.T.); (A.Ö.); (M.A.); (W.Z.); (M.S.); (S.-E.S.)
| | - Mohamed Altai
- Department of Clinical Sciences Lund, Oncology, Lund University, 22243 Lund, Sweden; (O.V.T.); (A.Ö.); (M.A.); (W.Z.); (M.S.); (S.-E.S.)
| | - Wahed Zedan
- Department of Clinical Sciences Lund, Oncology, Lund University, 22243 Lund, Sweden; (O.V.T.); (A.Ö.); (M.A.); (W.Z.); (M.S.); (S.-E.S.)
| | - Bo Holmqvist
- ImaGene-iT AB, Medicon Village, 22363 Lund, Sweden;
| | - Marcella Safi
- Department of Clinical Sciences Lund, Oncology, Lund University, 22243 Lund, Sweden; (O.V.T.); (A.Ö.); (M.A.); (W.Z.); (M.S.); (S.-E.S.)
| | - Thuy A. Tran
- Department of Radiopharmacy, Karolinska University Hospital, 17177 Stockholm, Sweden;
| | - Sven-Erik Strand
- Department of Clinical Sciences Lund, Oncology, Lund University, 22243 Lund, Sweden; (O.V.T.); (A.Ö.); (M.A.); (W.Z.); (M.S.); (S.-E.S.)
- Department of Clinical Sciences Lund, Medical Radiation Physics, Lund University, 22243 Lund, Sweden
| | - Joanna Strand
- Department of Clinical Sciences Lund, Oncology, Lund University, 22243 Lund, Sweden; (O.V.T.); (A.Ö.); (M.A.); (W.Z.); (M.S.); (S.-E.S.)
- Department of Clinical Oncology, Skane University Hospital, 22243 Lund, Sweden
- Correspondence: ; Tel.: +46-736839033
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Gram M, Ekström C, Holmqvist B, Carey G, Wang X, Vallius S, Hellström W, Ortenlöf N, Agyemang AA, Smith LEH, Hellström A, Mangili A, Barton N, Ley D. Insulin-Like Growth Factor 1 in the Preterm Rabbit Pup: Characterization of Cerebrovascular Maturation following Administration of Recombinant Human Insulin-Like Growth Factor 1/Insulin-Like Growth Factor 1-Binding Protein 3. Dev Neurosci 2021; 43:281-295. [PMID: 34218224 PMCID: PMC8623584 DOI: 10.1159/000516665] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 11/12/2020] [Accepted: 03/28/2021] [Indexed: 11/19/2022] Open
Abstract
Following preterm birth, serum levels of insulin-like growth factor 1 (IGF-1) decrease compared to corresponding in utero levels. A recent clinical trial indicated that supplementation with recombinant human (rh) IGF-1/rhIGF-binding protein 3 (rhIGF-1/rhIGFBP-3) prevents severe intraventricular hemorrhage (IVH) in extremely preterm infants. In a preterm rabbit pup model, we characterized endogenous serum and hepatic IGF-1, along with brain distribution of IGF-1 and IGF-1 receptor (IGF1R). We then evaluated the effects of rhIGF-1/rhIGFBP-3 on gene expression of regulators of cerebrovascular maturation and structure. Similar to preterm infants, serum IGF-1 concentrations decreased rapidly after preterm birth in the rabbit pup. Administration of rhIGF-1/rhIGFBP-3 restored in utero serum levels but was rapidly eliminated. Immunolabeled IGF1R was widely distributed in multiple brain regions, displaying an abundant density in the choroid plexus and sub-ependymal germinal zones. Increased IGF-1 immunoreactivity, distributed as IGF1R, was detected 4 h after rhIGF-1/rhIGFBP-3 administration. The rhIGF-1/rhIGFBP-3 treatment led to upregulation of choroid plexus genes involved in vascular maturation and structure, with corresponding protein translation for most of these genes. The preterm rabbit pup model is well suited for evaluation of IGF-1-based prevention of IVH. Administration of rhIGF-1/rhIGFBP-3 affects cerebrovascular maturation, suggesting a role for it in preventing preterm IVH.
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Affiliation(s)
- Magnus Gram
- Department of Clinical Sciences Lund, Pediatrics, Lund University, Lund, Sweden,
| | - Claes Ekström
- Department of Clinical Sciences Lund, Pediatrics, Lund University, Lund, Sweden
| | | | - Galen Carey
- Takeda Pharmaceuticals, Boston, Massachusetts, USA
| | - Xiaoyang Wang
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Suvi Vallius
- Department of Clinical Sciences Lund, Pediatrics, Lund University, Lund, Sweden
| | - William Hellström
- Department of Pediatrics, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Niklas Ortenlöf
- Department of Clinical Sciences Lund, Pediatrics, Lund University, Lund, Sweden
| | | | - Lois E H Smith
- Department of Ophthalmology, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Ann Hellström
- Department of Clinical Neuroscience, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Alexandra Mangili
- Global Clinical Development, Rare Metabolic Diseases, Shire, a Takeda Company, Zurich, Switzerland
| | | | - David Ley
- Department of Clinical Sciences Lund, Pediatrics, Lund University, Lund, Sweden
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12
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Grudén S, Brunmark C, Holmqvist B, Brenndörfer ED, Johansson M, Liu J, Zhao Y, Axén N, Hassan M. Biodistribution of fluorescence-labelled EGF protein from slow release NanoZolid depots in mouse. Int J Pharm 2021; 601:120588. [PMID: 33845148 DOI: 10.1016/j.ijpharm.2021.120588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 03/05/2021] [Accepted: 04/06/2021] [Indexed: 10/21/2022]
Abstract
AIM The study was designed to evaluate the ability of the calcium sulfate based NanoZolid® drug delivery technology to locally release the epidermal growth factor (EGF) protein while maintaining its biological activity. METHODS NanoZolid-formulated EGF protein labelled with a near infrared dye (EGF-NIR) depots or EGF-NIR dissolved in PBS were injected subcutaneously into mice bearing EGF receptor (EGFR) positive human A549 lung cancer tumors inoculated subcutaneously. The release and biodistribution of the EGF-NIR were investigated in vivo longitudinally up to 96 h post administration, utilizing whole body fluorescence imaging. In order to confirm the in vivo findings, histological analysis of tumor cryosections was performed to investigate EGF-NIR fluorescent signal and EGFR expression level by immunofluorescence labelling. RESULTS The in vivo fluorescence imaging showed a controlled release profile of the EGF-NIR loaded in the NanoZolid depots compared to free EGF-NIR. Histological analysis of the tumors further demonstrated a prevailing distribution of EGF-NIR in regions with high levels of EGFR expression. CONCLUSION Calcium sulfate based depots can be used to formulate EGF while maintaining its biological activity, e.g. receptor binding capability. This may have a good clinical potential for local delivery of biomolecules to enhance treatment efficacy and minimize systemic adverse effects.
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Affiliation(s)
- Stefan Grudén
- Experimental Cancer Medicine, Clinical Research Center, Karolinska Institutet, Stockholm, Sweden; LIDDS AB, Virdings allé 32B, SE-754 50 Uppsala, Sweden.
| | - Charlott Brunmark
- Truly Labs AB, Medicon Village, Scheelevägen 2, SE-223 81 Lund, Sweden.
| | - Bo Holmqvist
- ImaGene-iT AB, Medicon Village, Scheelevägen 2, SE-223 81 Lund, Sweden.
| | | | | | - Jian Liu
- Truly Labs AB, Medicon Village, Scheelevägen 2, SE-223 81 Lund, Sweden.
| | - Ying Zhao
- Experimental Cancer Medicine, Clinical Research Center, Karolinska Institutet, Stockholm, Sweden; Clinical Research Center (KFC) and Center for Allogeneic Stem Cell Transplantation (CAST), Karolinska University Hospital Huddinge, Stockholm, Sweden.
| | - Niklas Axén
- LIDDS AB, Virdings allé 32B, SE-754 50 Uppsala, Sweden.
| | - Moustapha Hassan
- Experimental Cancer Medicine, Clinical Research Center, Karolinska Institutet, Stockholm, Sweden; Clinical Research Center (KFC) and Center for Allogeneic Stem Cell Transplantation (CAST), Karolinska University Hospital Huddinge, Stockholm, Sweden.
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13
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Agyemang AA, Kvist SV, Brinkman N, Gentinetta T, Illa M, Ortenlöf N, Holmqvist B, Ley D, Gram M. Cell-free oxidized hemoglobin drives reactive oxygen species production and pro-inflammation in an immature primary rat mixed glial cell culture. J Neuroinflammation 2021; 18:42. [PMID: 33573677 PMCID: PMC7879625 DOI: 10.1186/s12974-020-02052-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [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: 05/22/2020] [Accepted: 12/09/2020] [Indexed: 12/17/2022] Open
Abstract
Background Germinal matrix intraventricular hemorrhage (GM-IVH) is associated with deposition of redox active cell-free hemoglobin (Hb), derived from hemorrhagic cerebrospinal fluid (CSF), in the cerebrum and cerebellum. In a recent study, using a preterm rabbit pup model of IVH, intraventricularly administered haptoglobin (Hp), a cell-free Hb scavenger, partially reversed the damaging effects observed following IVH. Together, this suggests that cell-free Hb is central in the pathophysiology of the injury to the immature brain following GM-IVH. An increased understanding of the causal pathways and metabolites involved in eliciting the damaging response following hemorrhage is essential for the continued development and implementation of neuroprotective treatments of GM-IVH in preterm infant. Methods We exposed immature primary rat mixed glial cells to hemorrhagic CSF obtained from preterm human infants with IVH (containing a mixture of Hb-metabolites) or to a range of pure Hb-metabolites, incl. oxidized Hb (mainly metHb with iron in Fe3+), oxyHb (mainly Fe2+), or low equivalents of heme, with or without co-administration with human Hp (a mixture of isotype 2-2/2-1). Following exposure, cellular response, reactive oxygen species (ROS) generation, secretion and expression of pro-inflammatory cytokines and oxidative markers were evaluated. Results Exposure of the glial cells to hemorrhagic CSF as well as oxidized Hb, but not oxyHb, resulted in a significantly increased rate of ROS production that positively correlated with the rate of production of pro-inflammatory and oxidative markers. Congruently, exposure to oxidized Hb caused a disintegration of the polygonal cytoskeletal structure of the glial cells in addition to upregulation of F-actin proteins in microglial cells. Co-administration of Hp partially reversed the damaging response of hemorrhagic CSF and oxidized Hb. Conclusion Exposure of mixed glial cells to oxidized Hb initiates a pro-inflammatory and oxidative response with cytoskeletal disintegration. Early administration of Hp, aiming to minimize the spontaneous autoxidation of cell-free oxyHb and liberation of heme, may provide a therapeutic benefit in preterm infant with GM-IVH.
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Affiliation(s)
| | - Suvi Vallius Kvist
- Lund University, Department of Clinical Sciences Lund, Pediatrics, Lund, Sweden
| | | | | | - Miriam Illa
- Fetal i+D Fetal Medicine Research Center, BCNatal-Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Deu), Institut Clínic de Ginecologia, Obstetricia i Neonatologia, Universitat de Barcelona, Barcelona, Spain
| | - Niklas Ortenlöf
- Lund University, Department of Clinical Sciences Lund, Pediatrics, Lund, Sweden
| | | | - David Ley
- Lund University, Department of Clinical Sciences Lund, Pediatrics, Lund, Sweden
| | - Magnus Gram
- Lund University, Department of Clinical Sciences Lund, Pediatrics, Lund, Sweden.
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14
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Jankovskaja S, Labrousse A, Prévaud L, Holmqvist B, Brinte A, Engblom J, Rezeli M, Marko-Varga G, Ruzgas T. Visualisation of H 2O 2 penetration through skin indicates importance to develop pathway-specific epidermal sensing. Mikrochim Acta 2020; 187:656. [PMID: 33188446 PMCID: PMC7666278 DOI: 10.1007/s00604-020-04633-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 11/01/2020] [Indexed: 01/07/2023]
Abstract
Elevated amounts of reactive oxygen species (ROS) including hydrogen peroxide (H2O2) are observed in the epidermis in different skin disorders. Thus, epidermal sensing of H2O2 should be useful to monitor the progression of skin pathologies. We have evaluated epidermal sensing of H2O2 in vitro, by visualising H2O2 permeation through the skin. Skin membranes were mounted in Franz cells, and a suspension of Prussian white microparticles was deposited on the stratum corneum face of the skin. Upon H2O2 permeation, Prussian white was oxidised to Prussian blue, resulting in a pattern of blue dots. Comparison of skin surface images with the dot patterns revealed that about 74% of the blue dots were associated with hair shafts. The degree of the Prussian white to Prussian blue conversion strongly correlated with the reciprocal resistance of the skin membranes. Together, the results demonstrate that hair follicles are the major pathways of H2O2 transdermal penetration. The study recommends that the development of H2O2 monitoring on skin should aim for pathway-specific epidermal sensing, allowing micrometre resolution to detect and quantify this ROS biomarker at hair follicles.Graphical abstract.
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Affiliation(s)
- Skaidre Jankovskaja
- Department of Biomedical Science, Faculty of Health and Society, Malmö University, 205 06, Malmö, Sweden
- Biofilms - Research Center for Biointerfaces, Malmö University, 205 06, Malmö, Sweden
| | - Anaïs Labrousse
- Department of Biological Engineering, Clermont Auvergne University, 63100, Aubiere, France
| | - Léa Prévaud
- Faculty of Sciences, University of Montpellier, 34085, Montpellier, France
| | - Bo Holmqvist
- ImaGene-iT, Medicon Village, 223 81, Lund, Sweden
| | | | - Johan Engblom
- Department of Biomedical Science, Faculty of Health and Society, Malmö University, 205 06, Malmö, Sweden
- Biofilms - Research Center for Biointerfaces, Malmö University, 205 06, Malmö, Sweden
| | - Melinda Rezeli
- Clinical Protein Science & Imaging, Biomedical Centre, Department of Biomedical Engineering, Lund University, BMC D13, 221 84, Lund, Sweden
| | - György Marko-Varga
- Clinical Protein Science & Imaging, Biomedical Centre, Department of Biomedical Engineering, Lund University, BMC D13, 221 84, Lund, Sweden
| | - Tautgirdas Ruzgas
- Department of Biomedical Science, Faculty of Health and Society, Malmö University, 205 06, Malmö, Sweden.
- Biofilms - Research Center for Biointerfaces, Malmö University, 205 06, Malmö, Sweden.
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15
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Van der Veeken L, Grönlund S, Gerdtsson E, Holmqvist B, Deprest J, Ley D, Bruschettini M. Long-term neurological effects of neonatal caffeine treatment in a rabbit model of preterm birth. Pediatr Res 2020; 87:1011-1018. [PMID: 31812154 DOI: 10.1038/s41390-019-0718-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2019] [Revised: 11/20/2019] [Accepted: 11/26/2019] [Indexed: 01/31/2023]
Abstract
BACKGROUND Neonatal caffeine treatment might affect brain development. Long-term studies show conflicting results on brain-related outcomes. Herein we aimed to investigate the long-term effects of neonatal caffeine administration in a rabbit model of preterm birth. METHODS Preterm (born day 29) and term (day 32) pups were raised by wet nurses and allocated to treatment with saline or caffeine for 7 or 17 days. At pre-puberty, neurobehavioral tests were performed and brains were harvested for immunostaining of neurons, synapses, myelin, and astrocytes. RESULTS Survival was lower in preterm saline pups than in controls, whereas caffeine-treated preterm pups did not differ from term control pups. Preterm saline pups covered less distance compared to controls and were more likely to stay in the peripheral zone of the open field. Corresponding differences were not seen in preterm caffeine pups. Preterm animals had lower neuron density compared to controls, which was not influenced by caffeine treatment. Synaptic density, astrocytes, and myelin were not different between groups. CONCLUSION Caffeine appeared to be safe. All preterm rabbits had lower neuron density but anxious behavior seen in preterm saline rabbits was not seen in caffeine-treated preterm pups.
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Affiliation(s)
- Lennart Van der Veeken
- Department of Development and Regeneration, Cluster Woman and Child, Group Biomedical Sciences, KU Leuven University of Leuven, Leuven, Belgium
| | - Susanne Grönlund
- Department of Clinical Sciences Lund, Paediatrics, Lund University, Skane University Hospital, Lund, Sweden
| | | | | | - Jan Deprest
- Department of Development and Regeneration, Cluster Woman and Child, Group Biomedical Sciences, KU Leuven University of Leuven, Leuven, Belgium.,Institute for Women's Health, University College London, London, UK
| | - David Ley
- Department of Clinical Sciences Lund, Paediatrics, Lund University, Skane University Hospital, Lund, Sweden
| | - Matteo Bruschettini
- Department of Clinical Sciences Lund, Paediatrics, Lund University, Skane University Hospital, Lund, Sweden.
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Stenvall A, Larsson E, Holmqvist B, Strand SE, Jönsson BA. Quantitative γ-H2AX immunofluorescence method for DNA double-strand break analysis in testis and liver after intravenous administration of 111InCl 3. EJNMMI Res 2020; 10:22. [PMID: 32189079 PMCID: PMC7080928 DOI: 10.1186/s13550-020-0604-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [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: 12/12/2019] [Accepted: 01/31/2020] [Indexed: 12/25/2022] Open
Abstract
Background It is well known that a severe cell injury after exposure to ionizing radiation is the induction of DNA double-strand breaks (DSBs). After exposure, an early response to DSBs is the phosphorylation of the histone H2AX molecule regions adjacent to the DSBs, referred to as γ-H2AX foci. The γ-H2AX assay after external exposure is a good tool for investigating the link between the absorbed dose and biological effect. However, less is known about DNA DSBs and γ-H2AX foci within the tissue microarchitecture after internal irradiation from radiopharmaceuticals. Therefore, in this study, we aimed to develop and validate a quantitative ex vivo model using γ-H2AX immunofluorescence staining and confocal laser scanning microscopy (CLSM) to investigate its applicability in nuclear medicine dosimetry research. Liver and testis were selected as the organs to study after intravenous administration of 111InCl3. Results In this study, we developed and validated a method that combines ex vivo γ-H2AX foci labeling of tissue sections with in vivo systemically irradiated mouse testis and liver tissues. The method includes CLSM imaging for intracellular cell-specific γ-H2AX foci detection and quantification and absorbed dose calculations. After exposure to ionizing radiation from 111InCl3, both hepatocytes and non-hepatocytes within the liver showed an absorbed dose-dependent elevation of γ-H2AX foci, whereas no such correlation was seen for the testis tissue. Conclusion It is possible to detect and quantify the radiation-induced γ-H2AX foci within the tissues of organs at risk after internal irradiation. We conclude that our method developed is an appropriate tool to study dose–response relationships in animal organs and human tissue biopsies after internal exposure to radiation.
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Affiliation(s)
- Anna Stenvall
- Department of Medical Radiation Physics, Clinical Sciences, Lund University, Lund, Sweden.
| | - Erik Larsson
- Department of Radiation Physics, Skåne University Hospital, Lund, Sweden
| | | | - Sven-Erik Strand
- Department of Medical Radiation Physics, Clinical Sciences, Lund University, Lund, Sweden
| | - Bo-Anders Jönsson
- Department of Medical Radiation Physics, Clinical Sciences, Lund University, Lund, Sweden
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Ley D, Romantsik O, Vallius S, Sveinsdóttir K, Sveinsdóttir S, Agyemang AA, Baumgarten M, Mörgelin M, Lutay N, Bruschettini M, Holmqvist B, Gram M. Corrigendum: High Presence of Extracellular Hemoglobin in the Periventricular White Matter Following Preterm Intraventricular Hemorrhage. Front Physiol 2020; 11:27. [PMID: 32116747 PMCID: PMC7013207 DOI: 10.3389/fphys.2020.00027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Accepted: 01/14/2020] [Indexed: 12/02/2022] Open
Affiliation(s)
- David Ley
- Department of Clinical Sciences Lund, Pediatrics, Lund University, Skane University Hospital, Lund, Sweden
| | - Olga Romantsik
- Department of Clinical Sciences Lund, Pediatrics, Lund University, Skane University Hospital, Lund, Sweden
| | - Suvi Vallius
- Department of Clinical Sciences Lund, Pediatrics, Lund University, Skane University Hospital, Lund, Sweden
| | - Kristbjörg Sveinsdóttir
- Department of Clinical Sciences Lund, Pediatrics, Lund University, Skane University Hospital, Lund, Sweden
| | - Snjolaug Sveinsdóttir
- Department of Clinical Sciences Lund, Pediatrics, Lund University, Skane University Hospital, Lund, Sweden
| | - Alex A. Agyemang
- Department of Clinical Sciences Lund, Pediatrics, Lund University, Skane University Hospital, Lund, Sweden
| | - Maria Baumgarten
- Department of Clinical Sciences Lund, Infection Medicine, Lund University, Skane University Hospital, Lund, Sweden
| | - Matthias Mörgelin
- Department of Clinical Sciences Lund, Infection Medicine, Lund University, Skane University Hospital, Lund, Sweden
| | | | - Matteo Bruschettini
- Department of Clinical Sciences Lund, Pediatrics, Lund University, Skane University Hospital, Lund, Sweden
| | | | - Magnus Gram
- Department of Clinical Sciences Lund, Pediatrics, Lund University, Skane University Hospital, Lund, Sweden
- *Correspondence: Magnus Gram
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Romantsik O, Agyemang AA, Sveinsdóttir S, Rutardóttir S, Holmqvist B, Cinthio M, Mörgelin M, Gumus G, Karlsson H, Hansson SR, Åkerström B, Ley D, Gram M. The heme and radical scavenger α 1-microglobulin (A1M) confers early protection of the immature brain following preterm intraventricular hemorrhage. J Neuroinflammation 2019; 16:122. [PMID: 31174551 PMCID: PMC6554963 DOI: 10.1186/s12974-019-1486-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [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: 11/27/2018] [Accepted: 04/25/2019] [Indexed: 12/31/2022] Open
Abstract
Background Germinal matrix intraventricular hemorrhage (GM-IVH) is associated with cerebro-cerebellar damage in very preterm infants, leading to neurodevelopmental impairment. Penetration, from the intraventricular space, of extravasated red blood cells and extracellular hemoglobin (Hb), to the periventricular parenchyma and the cerebellum has been shown to be causal in the development of brain injury following GM-IVH. Furthermore, the damage has been described to be associated with the cytotoxic nature of extracellular Hb-metabolites. To date, there is no therapy available to prevent infants from developing either hydrocephalus or serious neurological disability. Mechanisms previously described to cause brain damage following GM-IVH, i.e., oxidative stress and Hb-metabolite toxicity, suggest that the free radical and heme scavenger α1-microglobulin (A1M) may constitute a potential neuroprotective intervention. Methods Using a preterm rabbit pup model of IVH, where IVH was induced shortly after birth in pups delivered by cesarean section at E29 (3 days prior to term), we investigated the brain distribution of recombinant A1M (rA1M) following intracerebroventricular (i.c.v.) administration at 24 h post-IVH induction. Further, short-term functional protection of i.c.v.-administered human A1M (hA1M) following IVH in the preterm rabbit pup model was evaluated. Results Following i.c.v. administration, rA1M was distributed in periventricular white matter regions, throughout the fore- and midbrain and extending to the cerebellum. The regional distribution of rA1M was accompanied by a high co-existence of positive staining for extracellular Hb. Administration of i.c.v.-injected hA1M was associated with decreased structural tissue and mitochondrial damage and with reduced mRNA expression for proinflammatory and inflammatory signaling-related genes induced by IVH in periventricular brain tissue. Conclusions The results of this study indicate that rA1M/hA1M is a potential candidate for neuroprotective treatment following preterm IVH. Electronic supplementary material The online version of this article (10.1186/s12974-019-1486-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Olga Romantsik
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | | | | | | | | | - Magnus Cinthio
- Department of Electrical Measurements, Lund University, Lund, Sweden
| | - Mattias Mörgelin
- Infection Medicine, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Gulcin Gumus
- Fetal i+D Fetal Medicine Research Center, BCNatal Barcelona Center for Maternal-Fetal and Neonatal Medicine, University of Barcelona, Barcelona, Spain
| | | | - Stefan R Hansson
- Obstetrics and Gynecology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Bo Åkerström
- Infection Medicine, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - David Ley
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Magnus Gram
- Pediatrics, Department of Clinical Sciences Lund, Lund University, Lund, Sweden. .,Infection Medicine, Department of Clinical Sciences Lund, Lund University, Lund, Sweden. .,A1M Pharma AB, Lund, Sweden.
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Kristiansson A, Ahlstedt J, Holmqvist B, Brinte A, Tran TA, Forssell-Aronsson E, Strand SE, Gram M, Åkerström B. Protection of Kidney Function with Human Antioxidation Protein α 1-Microglobulin in a Mouse 177Lu-DOTATATE Radiation Therapy Model. Antioxid Redox Signal 2019; 30:1746-1759. [PMID: 29943622 PMCID: PMC6477591 DOI: 10.1089/ars.2018.7517] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
AIMS Peptide receptor radionuclide therapy (PRRT) is in clinical use today to treat metastatic neuroendocrine tumors. Infused, radiolabeled, somatostatin analog peptides target tumors that are killed by irradiation damage. The peptides, however, are also retained in kidneys due to glomerular filtration, and the administered doses must be limited to avoid kidney damage. The human radical scavenger and antioxidant, α1-microglobulin (A1M), has previously been shown to protect bystander tissue against irradiation damage and has pharmacokinetic and biodistribution properties similar to somatostatin analogs. In this study, we have investigated if A1M can be used as a renal protective agent in PRRT. RESULTS We describe nephroprotective effects of human recombinant A1M on the short- and long-term renal damage observed following lutetium 177 (177Lu)-DOTATATE (150 MBq) exposure in BALB/c mice. After 1, 4, and 8 days (short term), 177Lu-DOTATATE injections resulted in increased formation of DNA double-strand breaks in the renal cortex, upregulated expression of apoptosis and stress response-related genes, and proteinuria (albumin in urine), all of which were significantly suppressed by coadministration of A1M (7 mg/kg). After 6, 12, and 24 weeks (long term), 177Lu-DOTATATE injections resulted in increased animal death, kidney lesions, glomerular loss, upregulation of stress genes, proteinuria, and plasma markers of reduced kidney function, all of which were suppressed by coadministration of A1M. Innovation and Conclusion: This study demonstrates that A1M effectively inhibits radiation-induced renal damage. The findings suggest that A1M may be used as a radioprotector during clinical PRRT, potentially facilitating improved tumor control and enabling more patients to receive treatment.
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Affiliation(s)
- Amanda Kristiansson
- 1 Division of Infection Medicine, Department of Clinical Sciences in Lund, Lund University , Lund, Sweden
| | - Jonas Ahlstedt
- 1 Division of Infection Medicine, Department of Clinical Sciences in Lund, Lund University , Lund, Sweden
| | | | | | - Thuy A Tran
- 3 Lund University Bioimaging Center , Lund, Sweden .,4 Department of Clinical Neuroscience, Karolinska Institutet , Stockholm, Sweden
| | - Eva Forssell-Aronsson
- 5 Department of Radiation Physics, Institute of Clinical Sciences, Sahlgrenska Cancer Center, University of Gothenburg , Sweden
| | - Sven-Erik Strand
- 6 Medical Radiation Physics, Department of Clinical Sciences in Lund, Lund University , Lund, Sweden
| | - Magnus Gram
- 1 Division of Infection Medicine, Department of Clinical Sciences in Lund, Lund University , Lund, Sweden .,7 Pediatrics, Department of Clinical Sciences in Lund, Skane University Hospital, Lund University , Lund, Sweden
| | - Bo Åkerström
- 1 Division of Infection Medicine, Department of Clinical Sciences in Lund, Lund University , Lund, Sweden
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Munksgaard Thorén M, Chmielarska Masoumi K, Krona C, Huang X, Kundu S, Schmidt L, Forsberg-Nilsson K, Floyd Keep M, Englund E, Nelander S, Holmqvist B, Lundgren-Åkerlund E. Integrin α10, a Novel Therapeutic Target in Glioblastoma, Regulates Cell Migration, Proliferation, and Survival. Cancers (Basel) 2019; 11:cancers11040587. [PMID: 31027305 PMCID: PMC6521287 DOI: 10.3390/cancers11040587] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [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: 03/22/2019] [Revised: 04/18/2019] [Accepted: 04/23/2019] [Indexed: 12/28/2022] Open
Abstract
New, effective treatment strategies for glioblastomas (GBMs), the most malignant and invasive brain tumors in adults, are highly needed. In this study, we investigated the potential of integrin α10β1 as a therapeutic target in GBMs. Expression levels and the role of integrin α10β1 were studied in patient-derived GBM tissues and cell lines. The effect of an antibody–drug conjugate (ADC), an integrin α10 antibody conjugated to saporin, on GBM cells and in a xenograft mouse model was studied. We found that integrin α10β1 was strongly expressed in both GBM tissues and cells, whereas morphologically unaffected brain tissues showed only minor expression. Partial or no overlap was seen with integrins α3, α6, and α7, known to be expressed in GBM. Further analysis of a subpopulation of GBM cells selected for high integrin α10 expression demonstrated increased proliferation and sphere formation. Additionally, siRNA-mediated knockdown of integrin α10 in GBM cells led to decreased migration and increased cell death. Furthermore, the ADC reduced viability and sphere formation of GBM cells and induced cell death both in vitro and in vivo. Our results demonstrate that integrin α10β1 has a functional role in GBM cells and is a novel, potential therapeutic target for the treatment of GBM.
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Affiliation(s)
| | | | - Cecilia Krona
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Rudbeck Laboratory, Uppsala University, SE-751 85 Uppsala, Sweden.
| | - Xiaoli Huang
- Xintela AB, Medicon Village, SE-223 81 Lund, Sweden.
| | - Soumi Kundu
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Rudbeck Laboratory, Uppsala University, SE-751 85 Uppsala, Sweden.
| | | | - Karin Forsberg-Nilsson
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Rudbeck Laboratory, Uppsala University, SE-751 85 Uppsala, Sweden.
| | - Marcus Floyd Keep
- Department of Neurosurgery, Sanford Brain and Spine Institute, Fargo, ND 58103, USA; Department of Surgery, School of Medicine, University of North Dakota, Fargo, ND 58102, USA.
| | - Elisabet Englund
- Neuropathology Lab, Division of Oncology and Pathology, Department of Clinical Sciences, Lund University, SE-221 84 Lund, Sweden.
| | - Sven Nelander
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Rudbeck Laboratory, Uppsala University, SE-751 85 Uppsala, Sweden.
| | - Bo Holmqvist
- ImaGene-iT AB, Medicon Village, SE-223 81 Lund, Sweden.
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21
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Isfoss BL, Holmqvist B, Sand E, Forsell J, Jernström H, Olsson H. Stellate cells and mesenchymal stem cells in benign mammary stroma are associated with risk factors for breast cancer - an observational study. BMC Cancer 2018; 18:230. [PMID: 29486751 PMCID: PMC6389039 DOI: 10.1186/s12885-018-4151-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [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: 06/14/2017] [Accepted: 02/19/2018] [Indexed: 12/19/2022] Open
Abstract
Background It is not known whether stromal cells in benign breast tissue can mediate risk of breast cancer. We recently described aldehyde dehydrogenase 1 A1 (ALDH1) positive (+) cells in morphologically normal breast stroma of premenopausal women, and the data indicated that their distribution is associated with clinical risk factors for breast cancer. The aim of the present study was to define the identities of these cells using histologic and immunohistologic methods, and to investigate associations between those cells and hormonal and genetic risk factors in pre- and postmenopausal women. Methods Stroma of morphologically normal tissue was analyzed in samples from 101 well-characterized women whose breasts had been operated. Morphology and immunolabeling were applied to determine cell identities based on the putative stem cell markers ALDH1 and stage-specific embryonic antigen-3 (SSEA3), and immunophenotypes indicating mast cells or stellate cells. The results were compared with the patients’ risk factors using regression analysis (two-tailed). Results ALDH1+ round/oval cells were associated with low parity in BRCA1/2 carriers (p = 0.022), while in non-BRCA1/2-carriers they were negatively associated with nulliparity (p = 0.057). In premenopausal women ALDH1+ round/oval cells were associated with family history (p = 0.058). SSEA3+ round/oval cells were morphologically and immunohistologically consistent with multilineage stress-enduring (Muse) cells, and these cells were independently associated with the breast cancer risk factors low parity (p = 0.015), family history (p = 0.021), and hormone use after menopause (p = 0.032). ALDH1+ spindle-shaped/polygonal cells were immunohistologically consistent with stellate cells, and were negatively associated with family history of breast cancer (p = 0.001). Conclusion This study identified novel stromal cell types in benign breast tissue that have a potential for stratifying women for breast cancer risk. Electronic supplementary material The online version of this article (10.1186/s12885-018-4151-x) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Björn Logi Isfoss
- Department of Clinical Sciences, Lund, Division of Oncology and Pathology, Lund University, Lund, Sweden. .,Department of Pathology, Skane University Hospital, Lund, Sweden. .,Department of Pathology, Telemark Hospital, Ulefossv. 55, 3710, Skien, Norway.
| | - Bo Holmqvist
- Department of Clinical Sciences, Lund, Division of Oncology and Pathology, Lund University, Lund, Sweden.,ImaGene-iT, Medicon Village, Lund, Sweden
| | - Elin Sand
- ImaGene-iT, Medicon Village, Lund, Sweden
| | | | - Helena Jernström
- Department of Clinical Sciences, Lund, Division of Oncology and Pathology, Lund University, Lund, Sweden
| | - Håkan Olsson
- Department of Clinical Sciences, Lund, Division of Oncology and Pathology, Lund University, Lund, Sweden.,Department of Clinical Sciences, Lund, Division of Cancer Epidemiology, Lund University, Lund, Sweden
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22
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Olsson HL, Isfoss BL, Holmqvist B, Jernstrom H. Abstract P3-10-15: Stellate cells and mesenchymal stem cells in benign mammary stroma are associated with risk factors for breast cancer. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p3-10-15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: It is not known whether stromal cells in benign breast tissue can mediate risk of breast cancer. We recently described aldehyde dehydrogenase 1 A1 (ALDH1) positive (+) cells in morphologically normal breast stroma of premenopausal women, and the data indicated that their distribution is associated with clinical risk factors for breast cancer. The aim of the present study was to define the identities of these cells using histological and immunohistological methods, and to investigate associations between those cells and hormonal and genetic risk factors in pre- and postmenopausal women.
Methods: Stroma of morphologically normal tissue was analyzed in samples from 101 well-characterized women whose breasts had been operated. Morphology and immunolabeling were applied to determine cell identities based on the putative stem cell markers ALDH1 and stage-specific embryonic antigen-3 (SSEA3), and immunophenotypes indicating mast cells or stellate cells. The results were compared with the patients' risk factors using regression analysis (two-tailed).
Results: ALDH1+ round/oval cells were associated with low parity in BRCA1/2 carriers (p = 0.022), while in non-BRCA1/2-carriers they were negatively associated with nulliparity (p = 0.057). In premenopausal women ALDH1+ round/oval cells were associated with family history (p = 0.058). SSEA3+ round/oval cells were morphologically and immunohistologically consistent with multilineage stress-enduring (Muse) cells, and these cells were independently associated with the breast cancer risk factors low parity (p = 0.015), family history (p = 0.021), and hormone use after menopause (p = 0.032). ALDH1+ spindle-shaped/polygonal cells were immunohistologically consistent with stellate cells, and were negatively associated with family history of breast cancer (p = 0.001).
Conclusion: This study identified novel stromal cell types in benign breast tissue that have a potential for stratifying women for breast cancer risk.
Citation Format: Olsson HL, Isfoss BL, Holmqvist B, Jernstrom H. Stellate cells and mesenchymal stem cells in benign mammary stroma are associated with risk factors for breast cancer [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P3-10-15.
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Affiliation(s)
- HL Olsson
- Clinical Sciences, Lund University, Lund, Sweden
| | - BL Isfoss
- Clinical Sciences, Lund University, Lund, Sweden
| | - B Holmqvist
- Clinical Sciences, Lund University, Lund, Sweden
| | - H Jernstrom
- Clinical Sciences, Lund University, Lund, Sweden
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23
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Agyemang AA, Sveinsdóttir K, Vallius S, Sveinsdóttir S, Bruschettini M, Romantsik O, Hellström A, Smith LEH, Ohlsson L, Holmqvist B, Gram M, Ley D. Cerebellar Exposure to Cell-Free Hemoglobin Following Preterm Intraventricular Hemorrhage: Causal in Cerebellar Damage? Transl Stroke Res 2017; 8:10.1007/s12975-017-0539-1. [PMID: 28601919 PMCID: PMC5590031 DOI: 10.1007/s12975-017-0539-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 05/09/2017] [Indexed: 11/05/2022]
Abstract
Decreased cerebellar volume is associated with intraventricular hemorrhage (IVH) in very preterm infants and may be a principal component in neurodevelopmental impairment. Cerebellar deposition of blood products from the subarachnoid space has been suggested as a causal mechanism in cerebellar underdevelopment following IVH. Using the preterm rabbit pup IVH model, we evaluated the effects of IVH induced at E29 (3 days prior to term) on cerebellar development at term-equivalent postnatal day 0 (P0), term-equivalent postnatal day 2 (P2), and term-equivalent postnatal day 5 (P5). Furthermore, the presence of cell-free hemoglobin (Hb) in cerebellar tissue was characterized, and cell-free Hb was evaluated as a causal factor in the development of cerebellar damage following preterm IVH. IVH was associated with a decreased proliferative (Ki67-positive) portion of the external granular layer (EGL), delayed Purkinje cell maturation, and activated microglia in the cerebellar white matter. In pups with IVH, immunolabeling of the cerebellum at P0 demonstrated a widespread presence of cell-free Hb, primarily distributed in the white matter and the molecular layer. Intraventricular injection of the Hb scavenger haptoglobin (Hp) resulted in a corresponding distribution of immunolabeled Hp in the cerebellum and a partial reversal of the damaging effects observed following IVH. The results suggest that cell-free Hb is causally involved in cerebellar damage following IVH and that blocking cell-free Hb may have protective effects.
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Affiliation(s)
- Alex Adusei Agyemang
- Pediatrics, Department of Clinical Sciences Lund, Skåne University Hospital, Lund University, BMC C14, SE-221 84, Lund, Sweden
| | - Kristbjörg Sveinsdóttir
- Pediatrics, Department of Clinical Sciences Lund, Skåne University Hospital, Lund University, BMC C14, SE-221 84, Lund, Sweden
| | - Suvi Vallius
- Pediatrics, Department of Clinical Sciences Lund, Skåne University Hospital, Lund University, BMC C14, SE-221 84, Lund, Sweden
| | - Snjolaug Sveinsdóttir
- Pediatrics, Department of Clinical Sciences Lund, Skåne University Hospital, Lund University, BMC C14, SE-221 84, Lund, Sweden
| | - Matteo Bruschettini
- Pediatrics, Department of Clinical Sciences Lund, Skåne University Hospital, Lund University, BMC C14, SE-221 84, Lund, Sweden
| | - Olga Romantsik
- Pediatrics, Department of Clinical Sciences Lund, Skåne University Hospital, Lund University, BMC C14, SE-221 84, Lund, Sweden
| | - Ann Hellström
- Department of Ophthalmology, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Lois E H Smith
- Department of Ophthalmology, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | | | | | - Magnus Gram
- Pediatrics, Department of Clinical Sciences Lund, Skåne University Hospital, Lund University, BMC C14, SE-221 84, Lund, Sweden
- Infection Medicine, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - David Ley
- Pediatrics, Department of Clinical Sciences Lund, Skåne University Hospital, Lund University, BMC C14, SE-221 84, Lund, Sweden.
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Johansson PI, Holmqvist B. An Experimental Study of the Prompt Fission Neutron Spectrum Induced by 0.5-MeV Neutrons Incident on Uranium-235. NUCL SCI ENG 2017. [DOI: 10.13182/nse77-a15210] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- P. I. Johansson
- Atomic Energy Company, Neutron Physics Laboratory Studsvik, S-611 OJ Nykoping I. Sweden
| | - B. Holmqvist
- Atomic Energy Company, Neutron Physics Laboratory Studsvik, S-611 OJ Nykoping I. Sweden
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Hurley SM, Lutay N, Holmqvist B, Shannon O. The Dynamics of Platelet Activation during the Progression of Streptococcal Sepsis. PLoS One 2016; 11:e0163531. [PMID: 27656898 PMCID: PMC5033464 DOI: 10.1371/journal.pone.0163531] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2016] [Accepted: 09/09/2016] [Indexed: 01/11/2023] Open
Abstract
Platelets contribute to inflammation however, the role of platelet activation during the pathophysiological response to invasive bacterial infection and sepsis is not clear. Herein, we have investigated platelet activation in a mouse model of invasive Streptococcus pyogenes infection at 5, 12, and 18 hours post infection and correlated this to parameters of infection. The platelet population in ex-vivo blood samples showed no increased integrin activation or surface presentation of CD62P, however platelet-neutrophil complex formation and plasma levels of CD62P were increased during bacterial dissemination and the progression of sepsis, indicating that platelet activation had occurred in vivo. Platelet-neutrophil complex formation was the most discriminatory marker of platelet activation. Platelet-neutrophil complexes were increased above baseline levels during early sepsis but decreased to significantly lower levels than baseline during late sepsis. The removal of these complexes from the circulation coincided with a significant increase in organ damage and the accumulation of platelets in the liver sinusoids, suggesting that platelet activation in the circulation precedes accumulation of platelets in damaged organs. The results demonstrate that monitoring platelet activation using complementary methods may provide prognostic information during the pathogenesis of invasive S. pyogenes infection.
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Affiliation(s)
- Sinead M. Hurley
- Division of Infection Medicine, Department of Clinical Sciences, Lund University, Lund, SE- 22184 Lund, Sweden
| | | | - Bo Holmqvist
- Imagene-iT AB, Medicon Village, SE22381 Lund, Sweden
| | - Oonagh Shannon
- Division of Infection Medicine, Department of Clinical Sciences, Lund University, Lund, SE- 22184 Lund, Sweden
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Ley D, Romantsik O, Vallius S, Sveinsdóttir K, Sveinsdóttir S, Agyemang AA, Baumgarten M, Mörgelin M, Lutay N, Bruschettini M, Holmqvist B, Gram M. High Presence of Extracellular Hemoglobin in the Periventricular White Matter Following Preterm Intraventricular Hemorrhage. Front Physiol 2016; 7:330. [PMID: 27536248 PMCID: PMC4971438 DOI: 10.3389/fphys.2016.00330] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [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: 05/24/2016] [Accepted: 07/19/2016] [Indexed: 11/13/2022] Open
Abstract
Severe cerebral intraventricular hemorrhage (IVH) in preterm infants continues to be a major clinical problem, occurring in about 15-20% of very preterm infants. In contrast to other brain lesions the incidence of IVH has not been reduced over the last decade, but actually slightly increased. Currently over 50% of surviving infants develop post-hemorrhagic ventricular dilatation and about 35% develop severe neurological impairment, mainly cerebral palsy and intellectual disability. To date there is no therapy available to prevent infants from developing either hydrocephalus or serious neurological disability. It is known that blood rapidly accumulates within the ventricles following IVH and this leads to disruption of normal anatomy and increased local pressure. However, the molecular mechanisms causing brain injury following IVH are incompletely understood. We propose that extracellular hemoglobin is central in the pathophysiology of periventricular white matter damage following IVH. Using a preterm rabbit pup model of IVH the distribution of extracellular hemoglobin was characterized at 72 h following hemorrhage. Evaluation of histology, histochemistry, hemoglobin immunolabeling and scanning electron microscopy revealed presence of extensive amounts of extracellular hemoglobin, i.e., not retained within erythrocytes, in the periventricular white matter, widely distributed throughout the brain. Furthermore, double immunolabeling together with the migration and differentiation markers polysialic acid neural cell adhesion molecule (PSA-NCAM) demonstrates that a significant proportion of the extracellular hemoglobin is distributed in areas of the periventricular white matter with high extracellular plasticity. In conclusion, these findings support that extracellular hemoglobin may contribute to the pathophysiological processes that cause irreversible damage to the immature brain following IVH.
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Affiliation(s)
- David Ley
- Department of Clinical Sciences Lund, Pediatrics, Lund University, Skane University Hospital Lund, Sweden
| | - Olga Romantsik
- Department of Clinical Sciences Lund, Pediatrics, Lund University, Skane University Hospital Lund, Sweden
| | - Suvi Vallius
- Department of Clinical Sciences Lund, Pediatrics, Lund University, Skane University Hospital Lund, Sweden
| | - Kristbjörg Sveinsdóttir
- Department of Clinical Sciences Lund, Pediatrics, Lund University, Skane University Hospital Lund, Sweden
| | - Snjolaug Sveinsdóttir
- Department of Clinical Sciences Lund, Pediatrics, Lund University, Skane University Hospital Lund, Sweden
| | - Alex A Agyemang
- Department of Clinical Sciences Lund, Pediatrics, Lund University, Skane University Hospital Lund, Sweden
| | - Maria Baumgarten
- Department of Clinical Sciences Lund, Infection Medicine, Lund University, Skane University Hospital Lund, Sweden
| | - Matthias Mörgelin
- Department of Clinical Sciences Lund, Infection Medicine, Lund University, Skane University Hospital Lund, Sweden
| | | | - Matteo Bruschettini
- Department of Clinical Sciences Lund, Pediatrics, Lund University, Skane University Hospital Lund, Sweden
| | | | - Magnus Gram
- Department of Clinical Sciences Lund, Pediatrics, Lund University, Skane University Hospital Lund, Sweden
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27
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Isfoss BL, Holmqvist B, Jernström H, Alm P, Olsson H. The absence of aldehyde dehydrogenase 1 A1-positive cells in benign mammary stroma is associated with risk factors for breast cancer. Breast Cancer (Dove Med Press) 2016; 8:117-24. [PMID: 27313475 PMCID: PMC4890687 DOI: 10.2147/bctt.s106097] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
In this study, aldehyde dehydrogenase 1 (ALDH1)-expressing cells in stroma of histologically normal breast tissue from premenopausal women were investigated in situ regarding cellular morphology, cell distribution, and relation to the additional stem cell markers, CD44 (+) and CD24 (−). These results were correlated with hormonal and genetic risk factors for breast cancer. Triple immunofluorescence labeling was performed on tissues from premenopausal women with a family history of breast cancer, and breast reduction specimens from premenopausal women with no family history of breast cancer were used as a control group. The majority of ALDH1-immunoreactive cells in stroma were spindle-shaped or polygonal, and such cells that were CD44− and CD24− were absent in the breast stroma of a significantly larger number of nulliparous than parous women. A less common morphological type of ALDH1-positive cells in stroma was round or oval in shape, and such cells that were CD44+ and CD24− were absent in a significant number of women with a family history of breast cancer. The CD44+/CD24− immunophenotype is consistent with stem cells, and the round/oval morphology suggests mesenchymal cells. This study demonstrates that there are two morphologically distinct types of ALDH1-positive cells in histologically benign mammary stroma, and the absence of these cells is correlated with clinical risk factors for breast cancer in premenopausal women.
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Affiliation(s)
- Björn Logi Isfoss
- Department of Oncology and Pathology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden; Department of Pathology, Skane University Hospital, Lund, Sweden; Department of Pathology, Telemark Hospital, Skien, Norway
| | - Bo Holmqvist
- Department of Oncology and Pathology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden; ImaGene-iT AB, Medicon Village, Lund, Sweden
| | - Helena Jernström
- Department of Oncology and Pathology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Per Alm
- Department of Oncology and Pathology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden
| | - Håkan Olsson
- Department of Oncology and Pathology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden; Division of Cancer Epidemiology, Department of Clinical Sciences, Lund University, Lund, Sweden
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Ahlstedt J, Tran TA, Strand F, Holmqvist B, Strand SE, Gram M, Åkerström B. Biodistribution and pharmacokinetics of recombinant α1-microglobulin and its potential use in radioprotection of kidneys. Am J Nucl Med Mol Imaging 2015; 5:333-347. [PMID: 26269772 PMCID: PMC4529588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 03/27/2015] [Indexed: 06/04/2023]
Abstract
Peptide-receptor radionuclide therapy (PRRT) is a systemically administrated molecular targeted radiation therapy for treatment of neuroendocrine tumors. Fifteen years of clinical use show that renal toxicity, due to glomerular filtration of the peptides followed by local generation of highly reactive free radicals, is the main side-effect that limits the maximum activity that can be administrated for efficient therapy. α1-microglobulin (A1M) is an endogenous radical scavenger shown to prevent radiation-induced in vitro cell damage and protect non-irradiated surrounding cells. An important feature of A1M is that, following distribution to the blood, it is equilibrated to the extravascular compartments and filtrated in the kidneys. Aiming at developing renal protection against toxic side-effects of PRRT, we have characterized the pharmacokinetics and biodistribution of intravenously (i.v.) injected (125)I- and non-labelled recombinant human A1M and the (111)In- and fluorescence-labelled somatostatin analogue octreotide. Both molecules were predominantly localized to the kidneys, displaying a prevailing distribution in the cortex. A maximum of 76% of the injected A1M and 46% of the injected octreotide were present per gram kidney tissue at 10 to 20 minutes, respectively, after i.v. injection. Immunohistochemistry and fluorescence microscopy revealed a dominating co-existence of the two substances in proximal tubules, with a cellular co-localization in the epithelial cells. Importantly, analysis of kidney extracts displayed an intact, full-length A1M at least up to 60 minutes post-injection (p.i.). In summary, the results show a highly similar pharmacokinetics and biodistribution of A1M and octreotide, thus enabling the use of A1M to protect the kidneys tissue during PRRT.
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Affiliation(s)
- Jonas Ahlstedt
- Department of Clinical Sciences in Lund, Section of Medical Radiation Physics, Lund UniversityLund, Sweden
| | - Thuy A Tran
- Lund University Bioimaging Center, Lund UniversityLund, Sweden
| | - Filip Strand
- Department of Clinical Sciences in Lund, Section for Infection Medicine, Lund UniversityLund, Sweden
| | | | - Sven-Erik Strand
- Department of Clinical Sciences in Lund, Section of Medical Radiation Physics, Lund UniversityLund, Sweden
- Lund University Bioimaging Center, Lund UniversityLund, Sweden
| | - Magnus Gram
- Department of Clinical Sciences in Lund, Section for Infection Medicine, Lund UniversityLund, Sweden
| | - Bo Åkerström
- Department of Clinical Sciences in Lund, Section for Infection Medicine, Lund UniversityLund, Sweden
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Isfoss BL, Holmqvist B, Jernström H, Alm P, Olsson H. Women with familial risk for breast cancer have an increased frequency of aldehyde dehydrogenase expressing cells in breast ductules. BMC Clin Pathol 2013; 13:28. [PMID: 24188377 PMCID: PMC4175100 DOI: 10.1186/1472-6890-13-28] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [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: 04/22/2013] [Accepted: 10/30/2013] [Indexed: 01/16/2023] Open
Abstract
Background Knowledge is limited regarding the association between stem cells in histologically benign breast tissue and risk factors for breast cancer, and hence we addressed this issue in the present study. Recently, we assessed the histology of benign breast tissue from cancer and non-cancer patients for cells positive for the putative stem cell marker aldehyde dehydrogenase 1 A1 (ALDH), and the findings indicated an association between expression of ALDH and the hormonal factors menopause and hormone therapy. The current investigation examined possible associations between various known clinical and genetic risk factors for breast cancer and cellular expression of ALDH in ductules in benign human breast tissue. Methods The study included breast surgery patients that were BRCA1/2 mutation carriers without breast cancer (n = 23), had BRCA1/2 (n = 28) or sporadic (n = 21) breast cancer, or required non-cancer-related mammoplasty (n = 34). The distribution and frequency of ALDH-immunolabelled cells were correlated to patient subgroups with different risk factors, using mammoplasty patients as a control group. Statistical analyses comprised linear and logistic regression, Spearman’s rank test, Pearson’s test, and Fisher’s exact test. In two-tailed tests, p < 0.05 was considered significant. Results A strong association was found between family history of breast cancer and a high frequency of ALDH+ cells (p = 0.001) at all ductular levels in all groups, regardless of BRCA status, age, parity, or occurrence of cancer. In pre-menopausal non-BRCA cancer patients, the frequency of ALDH+ cells increased with age (p < 0.01) but decreased with increasing parity (p < 0.03). High frequencies of ALDH+ cells were found in the non-basal ductular levels in BRCA1 mutation carriers (p = 0.03), but in the basal ductular level in BRCA2 cancer patients (p = 0.02). Among post-menopausal patients, only on-going hormone replacement therapy was correlated with a high number of ALDH+ cells (p < 0.03). Conclusion In histologically normal breast tissue, we found a positive association between the frequency of ductular ALDH+ cells and several breast cancer risk factors, particularly family history of this disease, which supports previous evidence that ALDH plays a role in breast cancer.
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Affiliation(s)
- Björn L Isfoss
- Department of Oncology, Clinical Sciences Lund, Lund University, SE-221 85 Lund, Sweden.
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Yamatodani T, Holmqvist B, Kjellén E, Johnsson A, Mineta H, Wennerberg J. Using intravital microscopy to observe bevacizumab-mediated anti-angiogenesis in human head and neck squamous cell carcinoma xenografts. Acta Otolaryngol 2012; 132:1324-33. [PMID: 23039202 DOI: 10.3109/00016489.2012.699195] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
CONCLUSION The study showed the value of using intravital microscopy (IVM) analysis for the study of neoangiogenesis. It demonstrated that the model and the analytical methodology could be used to evaluate in detail the effects of treatment strategies for solid tumours. OBJECTIVES Neoangiogenesis is a key component of tumour progression, invasion and metastasis. In clinical trials monoclonal antibodies specific for vascular endothelial growth factor - VEGF (bevacizumab) - have been shown to significantly affect tumour progression when given in combination with standard chemotherapy, and also to improve the overall survival of patients. For squamous cell carcinoma of the head and neck (HNSCC), we still await definitive evidence of the effect of such treatment. The present study was designed to investigate the anti-angiogenesis effect of beviacizumab in green fluorescent protein (GFP)-labelled HNSCC xenografts using IVM technology. METHODS We performed IVM and used image analysis for quantification of angiogenesis and of effects of bevacizumab on cell viability, combined with histochemical and immunohistochemical analysis to standardize the digital analysis of changes in tumour vascularization and cell viability. RESULTS We found significant effects of bevacizumab on angiogenesis and cancer cell survival in HNSCC. Repeated injections of bevacizumab were found to provide the greatest effects.
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Isfoss BL, Holmqvist B, Alm P, Olsson H. Distribution of aldehyde dehydrogenase 1-positive stem cells in benign mammary tissue from women with and without breast cancer. Histopathology 2012; 60:617-33. [PMID: 22260461 DOI: 10.1111/j.1365-2559.2011.04109.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
AIMS Aldehyde dehydrogenase 1 (ALDH1) in female breast tissue has been linked to stem cells, but little is known about the benign cellular organization in situ. We investigated the distribution of ALDH1-immunoreactive (ALDH1+) cells in histomorphologically benign breast tissue from 28 women with or without breast cancer. METHODS AND RESULTS ALDH1+ cells were detected in benign tissue of women aged 20-72 years, located most commonly at the luminal and intermediate ductular levels and in the stroma. ALDH1+ cell populations and Ki67+ cell populations were present in separate ductules, both cell types rarely showing epithelial differentiation. ALDH1+ cells were non-reactive to Ki67 and oestrogen receptor. Stromal round/oval ALDH1+ non-leukocyte cells in both age groups expressed contractile protein. There was a lower concentration of luminal and intermediate ductular ALDH1+ cells in postmenopausal women than in premenopausal women, and in cancer patients than in non-cancer patients, and a higher concentration in women receiving exogenous hormones. CONCLUSIONS This study provides further evidence for the stem cell character of ALDH1+ cells, here in benign breast tissue of cancer and non-cancer patients throughout non-lactating adult life, and contributes evidence of benign stromal ALDH1+ cells. The distribution of ductular ALDH1+ stem cells appears to be influenced by hormonal status.
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Affiliation(s)
- Björn L Isfoss
- Department of Pathology, Telemark Hospital, Skien, Norway.
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Svensson M, Yadav M, Holmqvist B, Lutay N, Svanborg C, Godaly G. Acute pyelonephritis and renal scarring are caused by dysfunctional innate immunity in mCxcr2 heterozygous mice. Kidney Int 2011; 80:1064-72. [PMID: 21814172 PMCID: PMC3257042 DOI: 10.1038/ki.2011.257] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [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] [Indexed: 12/11/2022]
Abstract
The CXCR1 receptor and chemokine CXCL8 (IL-8) support neutrophil-dependent clearance of uropathogenic Escherichia coli from the urinary tract. CXCR1 is reduced in children prone to pyelonephritis, and heterozygous hCXCR1 polymorphisms are more common in this patient group than in healthy individuals, strongly suggesting a disease association. Since murine CXCR2 (mCXCR2) is functionally similar to human CXCR1, we determined effects of gene heterozygosity on the susceptibility to urinary tract infection by infecting heterozygous (mCxcr2(+/-)) mice with uropathogenic Escherichia coli. Clearance of infection and tissue damage were assessed as a function of innate immunity in comparison to that in knockout (mCxcr2(-/-)) and wild-type (mCxcr2(+/+)) mice. Acute sepsis-associated mortality was increased and bacterial clearance drastically impaired in heterozygous compared to wild-type mice. Chemokine and neutrophil responses were delayed along with evidence of neutrophil retention and unresolved kidney inflammation 1 month after infection. This was accompanied by epithelial proliferation and subepithelial fibrosis. The heterozygous phenotype was intermediate, between knockout and wild-type mice, but specific immune cell infiltrates that accompany chronic infection in knockout mice were not found. Hence, the known heterozygous CXCR1 polymorphisms may predispose patients to acute pyelonephritis and urosepsis.
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Affiliation(s)
- Majlis Svensson
- Department of Microbiology, Immunology and Glycobiology, Institute of Laboratory Medicine, Lund University, Lund, Sweden
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Persson O, Salford LG, Fransson J, Widegren B, Borrebaeck CAK, Holmqvist B. Distribution, cellular localization, and therapeutic potential of the tumor-associated antigen Ku70/80 in glioblastoma multiforme. J Neurooncol 2009; 97:207-15. [PMID: 19809793 DOI: 10.1007/s11060-009-0013-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2009] [Accepted: 09/14/2009] [Indexed: 10/20/2022]
Abstract
Antibodies specifically targeting tumor-associated antigens have proved to be important tools in the treatment of human cancer. A desirable target antigen should be unique to tumor cells, abundantly expressed, and readily available for antibody binding. The Ku70/80 DNA-repair protein is expressed in the nucleus of most cells; it is, however, also present on the cell surface of tumor cell lines, and antibodies binding Ku70/80 at the cell surface were recently shown to internalize into tumor cells. To evaluate the potential of Ku70/80-antigen as a therapeutic target for immunotoxins in glioblastoma multiforme, we investigated binding and localization of Ku70/80-specific antibodies in tissue samples from glioblastomas and normal human brains, and in glioma cell cultures. Furthermore, the internalization and drug-delivery capacity were evaluated by use of immunotoxicity studies. We demonstrate that Ku70/80 is localized on the cell plasma membrane of glioma cell lines, and is specifically present in human glioblastoma tissue. Antibodies bound to the Ku70/80 antigen on the cell surface of glioma cells were found to internalize via endocytosis, and shown to efficiently deliver toxins into glioblastoma cells. The data further imply that different antibodies directed against Ku70/80 possess different abilities to target the antigen, in relation to its presentation on the cell surface or intracellular localization. We conclude that Ku70/80 antigen is uniquely presented on the plasma membrane in glioblastomas, and that antibodies specific against the antigen have the capacity to selectively bind, internalize, and deliver toxins into tumor cells. These results imply that Ku70/80 is a potential target for immunotherapy of glioblastoma multiforme.
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Affiliation(s)
- Oscar Persson
- Department of Neurosurgery and The Rausing Laboratory, Lund University, Universitetssjukhuset EA14, 221 85, Lund, Sweden.
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Abstract
Clearance of the amyloid-beta peptide (A beta) as a remedy for Alzheimer's disease (AD) is a major target in on-going clinical trials. In vitro studies confirmed that A beta is taken up by rodent astrocytes, but knowledge on human astrocyte-mediated A beta clearance is sparse. Therefore, by means of flow cytometry and confocal laser scanning microscopy (CLSM), we evaluated the binding and internalization of A beta1-42 by primary human fetal astrocytes and adult astrocytes, isolated from nondemented subjects (n = 8) and AD subjects (n = 6). Furthermore, we analyzed whether alpha1-antichymotrypsin (ACT), which is found in amyloid plaques and can influence A beta fibrillogenesis, affects the A beta uptake by human astrocytes. Upon over night exposure of astrocytes to FAM-labeled A beta1-42 (10 microM) preparations, (80.7 +/- 17.7)% fetal and (52.9 +/- 20.9)% adult A beta-positive astrocytes (P = 0.018) were observed. No significant difference was found in A beta1-42 uptake between AD and non-AD astrocytes, and no influence of ApoE genotype on A beta1-42 uptake was observed in any group. There was no difference in the percentage of A beta-positive cells upon exposure to A beta1-42 (10 microM) combined with ACT (1,000:1, 100:1, and 10:1 molar ratio), versus A beta1-42 alone. CLSM revealed binding of A beta1-42 to the cellular surfaces and cellular internalization of smaller A beta1-42 fragments. Under these conditions, there was no increase in cellular release of the proinflammatory chemokine monocyte-chemoattractant protein 1, as compared with nontreated control astrocytes. Thus, primary human astrocytes derived from different sources can bind and internalize A beta1-42, and fetal astrocytes were more efficient in A beta1-42 uptake than adult astrocytes.
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Affiliation(s)
- Henrietta M Nielsen
- Department of Clinical Chemistry, Pathology, The Alzheimer Centre, VU University Medical Center Amsterdam, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands.
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Ny L, Li H, Mukherjee S, Persson K, Holmqvist B, Zhao D, Shtutin V, Huang H, Weiss LM, Machado FS, Factor SM, Chan J, Tanowitz HB, Jelicks LA. A magnetic resonance imaging study of intestinal dilation in Trypanosoma cruzi-infected mice deficient in nitric oxide synthase. Am J Trop Med Hyg 2008; 79:760-767. [PMID: 18981519 PMCID: PMC2701742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
Infection with Trypanosoma cruzi causes megasyndromes of the gastrointestinal (GI) tract. We used magnetic resonance imaging (MRI) to monitor alterations in the GI tract of T. cruzi-infected mice, and to assess the role of nitric oxide (NO) in the development of intestinal dilation. Brazil strain-infected C57BL/6 wild-type (WT) mice exhibited dilatation of the intestines by 30 days post-infection. Average intestine lumen diameter increased by 72%. Levels of intestinal NO synthase (NOS) isoforms, NOS2 and NOS3, were elevated in infected WT mice. Inflammation and ganglionitis were observed in all infected mice. Intestinal dilation was observed in infected WT, NOS1, NOS2, and NOS3 null mice. This study demonstrates that MRI is a useful tool to monitor intestinal dilation in living mice and that these alterations may begin during acute infection. Furthermore, our data strongly suggests that NO may not be the sole contributor to intestinal dysfunction resulting from this infection.
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Affiliation(s)
- Lars Ny
- Department of Oncology, Sahlgrenska University Hospital, SE-413 45 Göteborg, Sweden
| | - Hua Li
- Department of Physiology and Biophysics, Albert Einstein College of Medicine, Bronx, NY 10461
| | - Shankar Mukherjee
- Department of Pathology, Albert Einstein College of Medicine, Bronx, NY 10461
| | - Katarina Persson
- School of Pure and Applied Natural Sciences, University of Kalmar, SE-391 82 Kalmar, Sweden
| | - Bo Holmqvist
- Department of Pathology, Lund University Hospital, SE-221 85 Lund, Sweden
| | - Dazhi Zhao
- Department of Pathology, Albert Einstein College of Medicine, Bronx, NY 10461
| | - Vitaliy Shtutin
- Department of Pathology, Albert Einstein College of Medicine, Bronx, NY 10461
| | - Huan Huang
- Department of Pathology, Albert Einstein College of Medicine, Bronx, NY 10461
| | - Louis M. Weiss
- Departments of Pathology and Medicine, Albert Einstein College of Medicine, Bronx, NY 10461
| | - Fabiana S. Machado
- Division of Molecular Immunology, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH and the Department of Biochemistry and Immunology, Federal University of Minas Gerais, Belo Horizonte, Brazil
| | - Stephen M. Factor
- Departments Pathology and Medicine, Albert Einstein College of Medicine, Bronx, NY 10461
| | - John Chan
- Departments of Microbiology and Immunology and Medicine, Albert Einstein College of Medicine, Bronx, NY 10461
| | - Herbert B. Tanowitz
- Address correspondence to Herbert B. Tanowitz, Departments of Pathology and Medicine, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, NY 10461. E-mail:
| | - Linda A. Jelicks
- Department of Physiology and Biophysics, Albert Einstein College of Medicine, Bronx, NY 10461
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Ny L, Huang H, Holmqvist B, Li H, Jelicks LA, Factor SM, Weiss LM, Zhao D, Mukherjee S, Machado FS, Chan J, Shtutin V, Persson K, Tanowitz HB. A Magnetic Resonance Imaging Study of Intestinal Dilation in Trypanosoma cruzi–infected Mice Deficient in Nitric Oxide Synthase. Am J Trop Med Hyg 2008. [DOI: 10.4269/ajtmh.2008.79.760] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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Eaton JL, Holmqvist B, Glasgow E. Ontogeny of vasotocin-expressing cells in zebrafish: selective requirement for the transcriptional regulators orthopedia and single-minded 1 in the preoptic area. Dev Dyn 2008; 237:995-1005. [PMID: 18330923 DOI: 10.1002/dvdy.21503] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
The neurohypophysial peptide arginine vasotocin, and its mammalian ortholog arginine vasopressin, influence a wide range of physiological and behavioral responses, including aspects of sexual and social behaviors, osmoregulation, stress response, metabolism, blood pressure, and circadian rhythms. Here, we demonstrate that, in zebrafish (Danio rerio), the vasotocin precursor gene arginine vasotocin-neurophysin (avt) is expressed in two domains in the developing embryo: the dorsal preoptic area and the ventral hypothalamus. In the dorsal preoptic area, avt-expressing cells are intermingled with isotocin-neurophysin (ist) -expressing cells, and these neurons project to the neurohypophysis (posterior pituitary). In the dorsal preoptic area, the transcriptional regulators orthopedia b (otpb) and simple-minded 1 (sim1) are required for expression of both avt and ist. In contrast, otp and sim1 are not required for avt expression in the ventral hypothalamus. Thus, the development of these two avt expression domains is influenced by separate gene regulatory networks.
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Affiliation(s)
- Jennifer L Eaton
- Department of Biology, The University of Akron, Akron, Ohio, USA
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Abstract
Altered protease activity is considered important for tumour invasion and metastasis, processes in which the cysteine proteases cathepsin B and L are involved. Their natural inhibitor cystatin C is a secreted protein, suggesting that it functions to control extracellular protease activity. Because cystatins added to cell cultures can inhibit polio, herpes simplex and coronavirus replication, which are intracellular processes, the internalization and intracellular regulation of cysteine proteases by cystatin C should be considered. The extension, mechanism and biological importance of this hypothetical process are unknown. We investigated whether internalization of cystatin C occurs in a set of human cell lines. Demonstrated by flow cytometry and confocal microscopy, A‐431, MCF‐7, MDA‐MB‐453, MDA‐MB‐468 and Capan‐1 cells internalized fluorophore‐conjugated cystatin C when exposed to physiological concentrations (1 μm). During cystatin C incubation, intracellular cystatin C increased after 5 min and accumulated for at least 6 h, reaching four to six times the baseline level. Western blotting showed that the internalized inhibitor was not degraded. It was functionally intact and extracts of cells exposed to cystatin C showed a higher capacity to inhibit papain and cathepsin B than control cells (decrease in enzyme activity of 34% and 37%, respectively). The uptake of labelled cystatin C was inhibited by unlabelled inhibitor, suggesting a specific pathway for the internalization. We conclude that the cysteine protease inhibitor cystatin C is internalized in significant quantities in various cancer cell lines. This is a potentially important physiological phenomenon not previously described for this group of inhibitors.
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Affiliation(s)
- Ulf Ekström
- Department of Laboratory Medicine, Lund University, Sweden
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Nielsen HM, Janciauskiene S, Holmqvist B, Veerhuis R. P1‐495: Amyloid beta 1–42 binding and uptake by primary human astrocytes in vitro: Effects of alpha1‐antichymotrypsin. Alzheimers Dement 2008. [DOI: 10.1016/j.jalz.2008.05.1078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Henrietta M. Nielsen
- Vrije Universiteit Medical CenterDepts of Clinical ChemistryPathology and the Alzheimer CenterAmsterdamThe Netherlands
- Lund UniversityDept of Clinical Sciences MalmöMalmöSweden
| | | | - Bo Holmqvist
- Lund UniversityDept of Oncology Clinical ResearchLundSweden
| | - Robert Veerhuis
- Vrije Universiteit Medical CenterDepts of Clinical Chemistry, PsychiatryPathology and the Alzheimer CenterAmsterdamThe Netherlands
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Odenlund M, Holmqvist B, Baldetorp B, Hellstrand P, Nilsson BO. Polyamine synthesis inhibition induces S phase cell cycle arrest in vascular smooth muscle cells. Amino Acids 2008; 36:273-82. [PMID: 18368465 DOI: 10.1007/s00726-008-0060-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2008] [Accepted: 03/06/2008] [Indexed: 10/22/2022]
Abstract
Polyamines are important for cell growth and proliferation and they are formed from arginine and ornithine via arginase and ornithine decarboxylase (ODC). Arginine may alternatively be metabolised to NO via NO synthase. Here we study if vascular smooth muscle cell proliferation can be reversed by polyamine synthesis inhibitors and investigate their mechanism of action. Cell proliferation was assessed in cultured vascular smooth muscle A7r5 cells and in endothelium-denuded rat arterial rings by measuring [3H]-thymidine incorporation and by cell counting. Cell cycle phase distribution was determined by flow cytometry and polyamines by HPLC. Protein expression was determined by Western blotting. The ODC inhibitor DFMO (1-10 mM) reduced polyamine concentration and attenuated proliferation in A7r5 cells and rat tail artery. DFMO accumulated cells in S phase of the cell cycle and reduced cyclin A expression. DFMO had no effect on cell viability and apoptosis as assessed by fluorescence microscopy. Polyamine concentration and cellular proliferation were not affected by the arginase inhibitor NOHA (100-200 microM) and the NO synthase inhibitor L-NAME (100 microM). Lack of effect of NOHA was reflected by absence of arginase expression. Polyamine synthesis inhibition attenuates vascular smooth muscle cell proliferation by reducing DNA synthesis and accumulation of cells in S phase, and may be a useful approach to prevent vascular smooth muscle cell proliferation in cardiovascular diseases.
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Affiliation(s)
- M Odenlund
- Department of Experimental Medical Science, Division of Vascular and Airway Research, Unit of Vascular Physiology, Lund University, BMC D12, 221 84 Lund, Sweden
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Feridani AHI, Holmqvist B, Sjögren HO, Strand SE, Tennvall J, Baldetorp B. Combined flow cytometry and confocal laser scanning microscopy for evaluation of BR96 antibody cancer cell targeting and internalization. Cytometry A 2007; 71:361-70. [PMID: 17366637 DOI: 10.1002/cyto.a.20388] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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: 11/08/2022]
Abstract
BACKGROUND Monoclonal antibodies (mAb) are important tools in the management of tumor disease, and the discovery of antibodies with both specific cancer cell targeting and capacity to enter the cells by internalization are critical to improve the therapeutic efficacy. METHOD Antibody cancer cell targeting and internalization properties of fluoroscein-conjugated mAb made against Lewis Y (BR96) were evaluated quantitatively and qualitatively by means of flow cytometry (FCM) and confocal laser scanning microscopy (CLSM), respectively, on cells from a rat tumor cell line (BN7005-H1D2). RESULTS The study demonstrated a specific binding of BR96 to LewisY (LeY) located in the cell membrane and as BR96/LeY immunocomplexes (BR96/LeY) internalized into the cytoplasm. BR96/LeY was internalized into about 15% of the cells, usually distributed throughout the cytoplasm, but also located close to the nuclei. Cytotoxic effects by BR96 were indicated, and CLSM visualized subpopulations containing cells with bound or internalized BR96/LeY that possessed morphologically pyknotic nuclei and disrupted DNA. CONCLUSION The spatial-temporal pattern by BR96 cell targeting and internalization processes of BR96/LeY into the cancer cells expressing LeY was demonstrated by FCM and CLSM. Used together, the FCM and CLSM techniques provide a valuable tool for preclinical analyses of antibody targeting and their capacities as carriers of cytotoxic conjugates for the use in cancer therapy.
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Holmqvist B, Olsson CF, Svensson ML, Svanborg C, Forsell J, Alm P. Expression of nitric oxide synthase isoforms in the mouse kidney: cellular localization and influence by lipopolysaccharide and Toll-like receptor 4. J Mol Histol 2006; 36:499-516. [PMID: 16733795 DOI: 10.1007/s10735-006-9028-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2005] [Accepted: 03/29/2006] [Indexed: 11/25/2022]
Abstract
We determined the cellular mRNA expression of all intrarenal nitric oxide (NO)-producing NO synthase (NOS) isoforms, endothelial NOS (eNOS) and neuronal NOS (nNOS) and inducible NOS (iNOS) in kidneys from wild-type mice (WT) and immune deficient Toll-like receptor 4 (TLR4) mutant mice, during normal physiological conditions and during a short-term (6-16 h) endotoxic condition caused by systemically administered lipopolysaccaride (LPS). Investigations were performed by means of in situ hybridization and polymerase chain reaction amplification techniques. In WT, LPS altered the expression rate of all intrarenal NOS isoforms in a differentiated but NOS-isoform coupled expression pattern, with iNOS induction, and up- and down-regulation of the otherwise constitutively expressed NOS isoforms, e.g. eNOS and nNOS and an iNOS isotype. In TLR4 mutants, LPS caused none or a lowered iNOS induction, but altered the expression rate of the constitutive NOS isoforms. It is concluded that the intrarenal spatial relation of individual NOS-isoforms and their alteration in expression provide the basis for versatile NO-mediated renal actions that may include local interactions between NOS isoforms and their individual NO-target sites, and that the NOS-isoform dependent events are regulated by TLR4 during endotoxic processes. These regulatory mechanisms are likely to participate in different pathophysiological conditions affecting NO-mediated renal functions.
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Affiliation(s)
- Bo Holmqvist
- Department of Pathology, Inst. Medical Sciences, Lund University, Lund, Sweden.
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Abstract
BACKGROUND Urinary tract infections (UTIs) cause end-stage renal disease (ESRD) but the molecular mechanisms have remained unclear. Recently, the interleukin (IL)-8 receptor was shown to control disease susceptibility in mice and low IL-8 receptor expression was observed in pyelonephritis-prone patients. METHODS Intravesical Escherichia coli infection was established in mIL-8Rh-/- or Balb/c control mice. Survival, bacterial persistence, and histology were used as measurements of disease severity. RESULTS Within 2 days, 19/30 mIL-8Rh-/- mice developed lethal infection with bacteremia. Surviving mice remained infected and developed progressive renal damage with pathologic neutrophil accumulation and abscess formation first under the pelvic epithelium and then throughout the tissue. Recruited immune effector cells were unable to remove the dying neutrophils and frustrated macrophages formed foam cell aggregates. As a result, there was successive destruction of the mucosal barrier, medulla and cortex and necrosis of the renal papilla. The mIL-8Rh+/+ mice all survived and infection was cleared within a few days without symptoms or tissue pathology. CONCLUSION mIL-8Rh-/- mice develop acute bacteremic pyelonephritis and renal scarring due to a dysfunctional neutrophil response. The tissue damage resembles human disease, and these mice offer a model system to study the molecular mechanisms of renal scarring.
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Affiliation(s)
- Majlis Svensson
- Institute of Laboratory Medicine, Department of Microbiology, Immunology and Glycobiology, University of Lund, Lund, Sweden
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44
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Svensson M, Irjala H, Alm P, Holmqvist B, Lundstedt AC, Svanborg C. Reply from the Authors. Kidney Int 2005. [DOI: 10.1111/j.1523-1755.2005.360_2.x] [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: 11/28/2022]
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45
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Ebbesson LOE, Tipsmark CK, Holmqvist B, Nilsen T, Andersson E, Stefansson SO, Madsen SS. Nitric oxide synthase in the gill of Atlantic salmon: colocalization with and inhibition of Na+,K+-ATPase. J Exp Biol 2005; 208:1011-7. [PMID: 15767302 DOI: 10.1242/jeb.01488] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.2] [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: 11/20/2022]
Abstract
SUMMARY
We investigated the relationship between nitric oxide (NO) and Na+,K+-ATPase (NKA) in the gill of anadromous Atlantic salmon. Cells containing NO-producing enzymes were revealed by means of nitric oxide synthase (NOS) immunocytochemistry and nicotinamide adenine dinucleotide phosphate diaphorase (NADPHd) histochemistry, which can be used as an indicator of NOS activity, i.e. NO production. Antibodies against the two constitutive NOS isoforms, neuronal and endothelial NOS, both produced immunoreactivity restricted to large cells at the base and along the secondary lamellae. NADPHd-positive cells showed a corresponding distribution. Antibodies against the inducible NOS isoform only labeled small cells located deep in the filament. Using in situ hybridization and NKA immunoreactivity, cells expressing Na+,K+-ATPaseα-subunit mRNA were found to have a similar distribution to the NOS cells. Double labeling for NOS immunoreactivity and NKA α-subunit mRNA revealed cellular colocalization of NKA α-subunit mRNA and nNOS protein in putative chloride cells at the base of the lamellae and interlamellar space. Along the lamellae, some NOS- or NKA-immunoreactive cells possessed a relatively lower expression of NKA α-subunit mRNA in smolts. A clear increase in NADPHd staining in the gill was demonstrated from parr to smolt. The regulatory role of NO on gill NKA activity was studied in vitrousing sodium nitroprusside (SNP; 1 mmol l-1) and PAPA-NONOate(NOC-15; 0.5 mmol l-1) as NO donors. Both SNP and NOC-15 inhibited gill NKA activity by 30% when compared to controls. The study shows that NO systems are abundant in the gill of Atlantic salmon, that NO may be produced preferentially by a constitutive NOS isoform, and suggests that NO influence on gill functions is mediated via intracellular, possibly both auto/paracrine,inhibition of Na+,K+-ATPase activity in chloride cells. Furthermore, the increase in NADPHd in the gill during smoltification suggests a regulatory role of NO in the attenuation of the smoltification-related increase in Na+,K+-ATPase activity prior to entering seawater.
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Affiliation(s)
- Lars O E Ebbesson
- Department of Biology, University of Bergen, Bergen High Technology Centre, N-5020 Bergen, Norway.
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Holmqvist B, Ellingsen B, Forsell J, Zhdanova I, Alm P. The early ontogeny of neuronal nitric oxide synthase systems in the zebrafish. ACTA ACUST UNITED AC 2004; 207:923-35. [PMID: 14766951 DOI: 10.1242/jeb.00845] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [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: 11/20/2022]
Abstract
To examine a putative role for neuronal nitric oxide synthase (nNOS) in early vertebrate development we investigated nNOS mRNA expression and cGMP production during development of the zebrafish Danio rerio. The nNOS mRNA expression in the central nervous system (CNS) and periphery showed a distinct spatio-temporal pattern in developing zebrafish embryo and young larvae. nNOS mRNA expression was first detected at 19 h postfertilisation (h.p.f.), in a bilateral subpopulation of the embryonic ventrorostral cell cluster in the forebrain. The number of nNOS mRNA-expressing cells in the brain slowly increased, also appearing in the ventrocaudal cell cluster from about 26 h.p.f., and in the dorsorostral and hindbrain cell cluster and in the medulla at 30 h.p.f. A major increase in nNOS mRNA expression started at about 40 h.p.f., and by 55 h.p.f. the expression constituted cell populations in differentiated central nuclei and in association with the proliferation zones of the brain, and in the medulla and retina. In parts of the skin, nNOS mRNA expression started at 20 h.p.f. and ended at 55 h.p.f. Between 40 and 55 h.p.f., nNOS mRNA expression started in peripheral organs, forming distinct populations after hatching within or in the vicinity of the presumptive swim bladder, enteric ganglia, and along the alimentary tract and nephritic ducts. Expression of nNOS mRNA correlated with the neuronal differentiation pattern and with the timing and degree of cGMP production. These studies indicate spatio-temporal actions by NO during embryogenesis in the formation of the central and peripheral nervous system, with possible involvement in processes such as neurogenesis, organogenesis and early physiology.
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Affiliation(s)
- B Holmqvist
- Department of Pathology, Lund University, Sölvegatan 25, S-221 85 Lund, Sweden.
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Brustein E, Chong M, Holmqvist B, Drapeau P. Serotonin patterns locomotor network activity in the developing zebrafish by modulating quiescent periods. ACTA ACUST UNITED AC 2003; 57:303-22. [PMID: 14608665 DOI: 10.1002/neu.10292] [Citation(s) in RCA: 81] [Impact Index Per Article: 3.9] [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: 11/09/2022]
Abstract
Developing neural networks follow common trends such as expression of spontaneous, recurring activity patterns, and appearance of neuromodulation. How these processes integrate to yield mature, behaviorally relevant activity patterns is largely unknown. We examined the integration of serotonergic neuromodulation and its role in the functional organization of the accessible locomotor network in developing zebrafish at behavioral and cellular levels. Locally restricted populations of serotonergic neurons and their projections appeared in the hindbrain and spinal cord of larvae after hatching (approximately day 2). However, 5-HT affected the swimming pattern only from day 4 on, when sustained spontaneous swimming appeared. 5-HT and its agonist quipazine increased motor output by reducing intervals of inactivity, observed behaviorally (by high-speed video) and in recordings from spinal neurons during fictive swimming (by whole-cell current clamp). 5-HT and quipazine had little effect on the properties of the activity periods, such as the duration of swim episodes and swim frequency. Further, neuronal input resistance, rheobasic current, and resting potential were not affected significantly. The 5-HT antagonists methysergide and ketanserin decreased motor output by prolonging the periods of inactivity with little effect on the active swim episode or neuronal properties. Our results suggest that 5-HT neuromodulation is integrated early in development of the locomotor network to increase its output by reducing periods of inactivity with little effect on the activity periods, which in contrast are the main targets of 5-HT neuromodulation in neonatal and adult preparations.
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Affiliation(s)
- Edna Brustein
- McGill Center for Research in Neuroscience and Departments of Neurology & Neurosurgery, and Biology, McGill University, Montréal, Québec, Canada H3G 1A4
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Forsell J, Holmqvist B, Ekström P. Molecular identification and developmental expression of UV and green opsin mRNAs in the pineal organ of the Atlantic halibut. Brain Res Dev Brain Res 2002; 136:51-62. [PMID: 12036517 DOI: 10.1016/s0165-3806(02)00351-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The pineal organ is the only differentiated photoreceptor organ present in embryos and early larvae of the Atlantic halibut (Hippoglossus hippoglossus). We investigated the molecular identity of opsins in the pineal organ, and their expression during different life stages. Using RT-PCR we identified two 681-bp gene sequences, named HPO1 and HPO4, in cDNA from adult pineal and whole embryos. The predicted amino acid sequences showed highest identity to the transmembrane regions of teleostean RH2 green cone opsins (HPO1, 72-91%) and SWS-1 UV cone opsins (HPO4, 71-83%). In situ hybridization revealed expression of HPO1 and HPO4 mRNA transcripts in photoreceptors in the pineal organ of embryos, larvae and adults. HPO1 and HPO4 mRNA transcripts were also expressed in the larval retina. Our study provides molecular evidence for short and middle wavelength light sensitive photoreceptors in the pineal organ of Atlantic halibut throughout life, and suggests that pineal photoreception may play an important role during embryonic and larval life stages, especially at the time when the retina does not possesses corresponding photoreceptor capacity.
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Affiliation(s)
- Johan Forsell
- Department of Pathology, University of Lund, Lund, Sweden.
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Azadi S, Zhang Y, Caffé AR, Holmqvist B, van Veen T. Thyroid-beta2 and the retinoid RAR-alpha, RXR-gamma and ROR-beta2 receptor mRNAs; expression profiles in mouse retina, retinal explants and neocortex. Neuroreport 2002; 13:745-50. [PMID: 11997680 DOI: 10.1097/00001756-200205070-00003] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
In neonatal retinal explants cultured long-term green cones are missing. Recently it was reported that thyroid hormone beta2 receptors (TR-beta2) are essential for these green cones to differentiate. Therefore transcript level of these receptors was investigated in our mouse retinal explants. However, thyroid receptors function as heterodimers with retinoid receptors (RR); so the fate of selected RRs was similarly analyzed using semi-quantitative RT-PCR. Loss of TR-beta2 and RR (RXR-gamma and ROR-beta2) mRNAs was observed after culturing the neonatal retina for 12 days. This indicates that these proteins are involved in determination of green cone identity. In addition, levels of the selected RR transcripts are differentially affected by short- or long-term culture. In the latter case an attached retinal pigment epithelium seems to play a protective role. Furthermore, divergent diurnal peaks of RR mRNAs are present in young as well as aged mouse retina and neocortex. This data might be relevant in the context of human ageing disorders.
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Affiliation(s)
- S Azadi
- Department of Ophthalmology, Biomedical Center, University of Lund, Klinikgatan 26, S-221 84 Lund, Sweden
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Caffé AR, Ahuja P, Holmqvist B, Azadi S, Forsell J, Holmqvist I, Söderpalm AK, van Veen T. Mouse retina explants after long-term culture in serum free medium. J Chem Neuroanat 2001; 22:263-73. [PMID: 11719023 DOI: 10.1016/s0891-0618(01)00140-5] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.4] [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: 11/30/2022]
Abstract
The neonatal mouse retina remains viable as an explant in serum-supplemented growth media for more than 4 weeks. Interpretation of drug effects on this tissue is compromised by the enigmatic composition of the serum. We sought to remove this ambiguity by culturing neonatal as well as late postnatal mouse retina in serum-free nutrient medium. In this study three important observations were made, (1) there is histotypic development of neonatal as well as preservation of late postnatal mouse retinal structure during long-term culture in serum-free medium, although the late postnatal tissue tends to show some loss of cells in the outer nuclear layer. (2) Protein expression in explant photoreceptor cells was similar to that in the litter-matched ones, except for green cone opsin and interphotoreceptor retinoid-binding protein, although mRNA of the latter is present at similar amounts as in age-matched in vivo controls. (3) Cells of the inner retina stained by antibodies to calcium-binding proteins display some novel sprouting of processes. The results show that the mouse retina can be cultured as an explant for more than 4 weeks in a serum-free medium. This represents an important step forward because, (1) the possibility of interference of drug effects by unknown serum factors has been eliminated; and (2) the spent culture medium can be analyzed to investigate biomolecules released by the retina in vitro.
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Affiliation(s)
- A R Caffé
- Department of Ophthalmology, Biomedical Center-Wallenberg Retina Center, University of Lund, Klinikgatan 26, S-221 84 Lund, Sweden
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