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Morsink NC, Nijsen JFW, Grinwis GCM, Hesselink JW, Kirpensteijn J, van Nimwegen SA. Intratumoral injection of holmium-166 microspheres as neoadjuvant therapy of soft tissue sarcomas in dogs. Front Vet Sci 2022; 9:1015248. [PMID: 36387397 PMCID: PMC9664058 DOI: 10.3389/fvets.2022.1015248] [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: 08/09/2022] [Accepted: 10/10/2022] [Indexed: 01/24/2023] Open
Abstract
INTRODUCTION Minimally invasive microbrachytherapy is in development to treat solid tumors by intratumoral injection of (radioactive) holmium-166 (166Ho) microspheres (MS). A high local dose can be administered with minimal damage to surrounding tissue because of the short soft tissue penetration depth of 166Ho beta radiation. We aimed to prospectively evaluate the safety and efficacy of 166Ho microbrachytherapy in client-owned canine patients with soft tissue sarcomas (STS). METHODS We included seven dogs with STS not suitable for local excision due to tumor size and/or location. 166HoMS were suspended in a carrier fluid and multiple needle-injections were performed in predetermined tumor segments to maximize tumor coverage. Tumor response was evaluated using 3D caliper and CT measurements. Follow-up further included monitoring for potential side effects and registration of subsequent treatments and survival, until at least two years after treatment. RESULTS Delivered radioactive doses ranged from 70 to 969 Gy resulting in a mean tumor volume reduction of 49.0 ± 21.3% after 33 ± 25 days. Treatment-related side effects consisted of local necrosis (n = 1) and ulceration of the skin covering the tumor (n = 1), which resolved with basic wound care, and surgical excision of residual tumor, respectively. Residual tumor was surgically resected in six patients after 22-93 days. After a mean follow-up of 1,005 days, four patients were alive, two patients were euthanized because of unrelated causes, and one patient was euthanized because of disease progression after the owner(s) declined subsequent surgical treatment. CONCLUSION 166Ho microbrachytherapy was a safe and effective neoadjuvant treatment option for canine patients with STS.
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Affiliation(s)
- Nino Chiron Morsink
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands,*Correspondence: Nino Chiron Morsink
| | - Johannes Frank Wilhelmus Nijsen
- Department of Medical Imaging, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, Netherlands
| | | | - Jan Willem Hesselink
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | - Jolle Kirpensteijn
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
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Morsink NC, Klaassen NJM, Meij BP, Kirpensteijn J, Grinwis GCM, Schaafsma IA, Hesselink JW, Nijsen JFW, van Nimwegen SA. Case Report: Radioactive Holmium-166 Microspheres for the Intratumoral Treatment of a Canine Pituitary Tumor. Front Vet Sci 2021; 8:748247. [PMID: 34805338 PMCID: PMC8600255 DOI: 10.3389/fvets.2021.748247] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 09/27/2021] [Indexed: 11/13/2022] Open
Abstract
Introduction: In this case study, a client-owned dog with a large pituitary tumor was experimentally treated by intratumoral injection of radioactive holmium-166 microspheres (166HoMS), named 166Ho microbrachytherapy. To our knowledge, this is the first intracranial intratumoral treatment through needle injection of radioactive microspheres. Materials and Methods: A 10-year-old Jack Russell Terrier was referred to the Clinic for Companion Animal Health (Faculty of Veterinary Medicine, Utrecht University, The Netherlands) with behavioral changes, restlessness, stiff gait, and compulsive circling. MRI and CT showed a pituitary tumor with basisphenoid bone invasion and marked mass effect. The tumor measured 8.8 cm3 with a pituitary height-to-brain area (P/B) ratio of 1.86 cm-1 [pituitary height (cm) ×10/brain area (cm2)]. To reduce tumor volume and neurological signs, 166HoMS were administered in the tumor center by transsphenoidal CT-guided needle injections. Results: Two manual CT-guided injections were performed containing 0.6 ml of 166HoMS suspension in total. A total of 1097 MBq was delivered, resulting in a calculated average tumor dose of 1866 Gy. At 138 days after treatment, the tumor volume measured 5.3 cm3 with a P/B ratio of 1.41 cm-1, revealing a total tumor volume reduction of 40%. Debulking surgery was performed five months after 166HoMS treatment due to recurrent neurological signs. The patient was euthanized two weeks later at request of the owners. Histopathological analysis indicated a pituitary adenoma at time of treatment, with more malignant characteristics during debulking surgery. Conclusion: The 40% tumor volume reduction without evident severe periprocedural side effects demonstrated the feasibility of intracranial intratumoral 166HoMS treatment in this single dog.
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Affiliation(s)
- Nino Chiron Morsink
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | - Nienke Johanna Maria Klaassen
- Department of Medical Imaging, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, Netherlands
| | - Björn Petrus Meij
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | - Jolle Kirpensteijn
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | | | - Irene Afra Schaafsma
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | - Jan Willem Hesselink
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | - Johannes Frank Wilhelmus Nijsen
- Department of Medical Imaging, Radboud Institute for Health Sciences, Radboud University Medical Center, Nijmegen, Netherlands
- Quirem Medical, Deventer, Netherlands
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Rijkenhuizen ABM, Jonker FH, Grinwis GCM. Efficacy of laparoscopic ligation of the mesovarium of the mare in the standing position without removal of the ovary. PFERDEHEILKUNDE 2021. [DOI: 10.21836/pem20210102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Tellegen AR, Rudnik-Jansen I, Pouran B, de Visser HM, Weinans HH, Thomas RE, Kik MJL, Grinwis GCM, Thies JC, Woike N, Mihov G, Emans PJ, Meij BP, Creemers LB, Tryfonidou MA. Controlled release of celecoxib inhibits inflammation, bone cysts and osteophyte formation in a preclinical model of osteoarthritis. Drug Deliv 2018; 25:1438-1447. [PMID: 29890922 PMCID: PMC6058666 DOI: 10.1080/10717544.2018.1482971] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [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] [Indexed: 12/30/2022] Open
Abstract
Major hallmarks of osteoarthritis (OA) are cartilage degeneration, inflammation and osteophyte formation. COX-2 inhibitors counteract inflammation-related pain, but their prolonged oral use entails the risk for side effects. Local and prolonged administration in biocompatible and degradable drug delivery biomaterials could offer an efficient and safe treatment for the long-term management of OA symptoms. Therefore, we evaluated the disease-modifying effects and the optimal dose of polyesteramide microspheres delivering the COX-2 inhibitor celecoxib in a rat OA model. Four weeks after OA induction by anterior cruciate ligament transection and partial medial meniscectomy, 8-week-old female rats (n = 6/group) were injected intra-articular with celecoxib-loaded microspheres at three dosages (0.03, 0.23 or 0.39 mg). Unloaded microspheres served as control. During the 16-week follow-up, static weight bearing and plasma celecoxib concentrations were monitored. Post-mortem, micro-computed tomography and knee joint histology determined progression of synovitis, osteophyte formation, subchondral bone changes, and cartilage integrity. Systemic celecoxib levels were below the detection limit 6 days upon delivery. Systemic and local adverse effects were absent. Local delivery of celecoxib reduced the formation of osteophytes, subchondral sclerosis, bone cysts and calcified loose bodies, and reduced synovial inflammation, while cartilage histology was unaffected. Even though the effects on pain could not be evualated directly in the current model, our results suggest the application of celecoxib-loaded microspheres holds promise as novel, safe and effective treatment for inflammation and pain in OA.
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Affiliation(s)
- A R Tellegen
- a Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine , Utrecht University , Utrecht , The Netherlands
| | - I Rudnik-Jansen
- b Department of Orthopaedics , University Medical Centre Utrecht , Utrecht , The Netherlands
| | - B Pouran
- c Department of Rheumatology and Clinical Immunology , University Medical Centre Utrecht , Utrecht , The Netherlands
| | - H M de Visser
- c Department of Rheumatology and Clinical Immunology , University Medical Centre Utrecht , Utrecht , The Netherlands
| | - H H Weinans
- b Department of Orthopaedics , University Medical Centre Utrecht , Utrecht , The Netherlands.,c Department of Rheumatology and Clinical Immunology , University Medical Centre Utrecht , Utrecht , The Netherlands
| | - R E Thomas
- d Department of Pathobiology, Faculty of Veterinary Medicine , Utrecht University , Utrecht , The Netherlands
| | - M J L Kik
- d Department of Pathobiology, Faculty of Veterinary Medicine , Utrecht University , Utrecht , The Netherlands
| | - G C M Grinwis
- d Department of Pathobiology, Faculty of Veterinary Medicine , Utrecht University , Utrecht , The Netherlands
| | - J C Thies
- e DSM Biomedical , Geleen , the Netherlands
| | - N Woike
- e DSM Biomedical , Geleen , the Netherlands
| | - G Mihov
- e DSM Biomedical , Geleen , the Netherlands
| | - P J Emans
- f Department of Orthopaedics , University Medical Centre Maastricht , Maastricht , The Netherlands
| | - B P Meij
- a Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine , Utrecht University , Utrecht , The Netherlands
| | - L B Creemers
- b Department of Orthopaedics , University Medical Centre Utrecht , Utrecht , The Netherlands
| | - M A Tryfonidou
- a Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine , Utrecht University , Utrecht , The Netherlands
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Sloet van Oldruitenborgh-Oosterbaan MM, Grinwis GCM. Variability in eosinophilic infiltration within the rectal mucosa of clinically healthy horses. PFERDEHEILKUNDE 2017. [DOI: 10.21836/pem20170204] [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: 11/27/2022]
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Voorbij AMWY, Meij BP, van Bruggen LWL, Grinwis GCM, Stassen QEM, Kooistra HS. Atlanto-axial malformation and instability in dogs with pituitary dwarfism due to an LHX3 mutation. J Vet Intern Med 2015; 29:207-13. [PMID: 25586673 PMCID: PMC4858104 DOI: 10.1111/jvim.12523] [Citation(s) in RCA: 6] [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: 08/18/2014] [Revised: 10/13/2014] [Accepted: 11/13/2014] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Canine pituitary dwarfism or combined pituitary hormone deficiency (CPHD) in shepherd dogs is associated with an LHX3 mutation and can lead to a wide range of clinical manifestations. Some dogs with CPHD have neurological signs that are localized to the cervical spine. In human CPHD, caused by an LHX3 mutation, anatomical abnormalities in the atlanto-axial (C1-C2) joint have been described. OBJECTIVES To evaluate the presence of atlanto-axial malformations in dogs with pituitary dwarfism associated with an LHX3 mutation and to investigate the degree of similarity between the atlanto-axial anomalies found in canine and human CPHD patients with an LHX3 mutation. ANIMALS Three client-owned Czechoslovakian wolfdogs and 1 client-owned German shepherd dog, previously diagnosed with pituitary dwarfism caused by an LHX3 mutation, with neurological signs indicating a cervical spinal disorder. METHODS Radiography, computed tomography, and magnetic resonance imaging of the cranial neck and skull, necropsy, and histology. RESULTS Diagnostic imaging identified abnormal positioning of the dens axis and incomplete ossification of the suture lines between the ossification centers of the atlas with concurrent atlanto-axial instability and dynamic compression of the spinal cord by the dens axis. The malformations and aberrant motion at C1-C2 were confirmed at necropsy and histology. CONCLUSIONS AND CLINICAL IMPORTANCE The atlanto-axial abnormalities of the dwarf dogs resemble those encountered in human CPHD patients with an LHX3 mutation. These findings suggest an association between the LHX3 mutation in dogs with CPHD and atlanto-axial malformations. Consequently, pituitary dwarfs should be monitored closely for neurological signs.
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Affiliation(s)
- A M W Y Voorbij
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
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Manunta ML, Evangelisti MA, Bergknut N, Grinwis GCM, Ballocco I, Meij BP. Hydrated nucleus pulposus herniation in seven dogs. Vet J 2014; 203:342-4. [PMID: 25599897 DOI: 10.1016/j.tvjl.2014.12.027] [Citation(s) in RCA: 20] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Revised: 12/18/2014] [Accepted: 12/22/2014] [Indexed: 11/30/2022]
Abstract
The clinical signs, magnetic resonance imaging (MRI) findings, treatment and follow-up in seven dogs with hydrated nucleus pulposus extrusion (HNPE) are reported. All dogs had tetraparesis or tetraplegia. T2-weighted MRI revealed extradural hyperintense homogeneous material compressing the cervical spinal cord. After conservative treatment (five dogs) or surgical decompression (two dogs), all dogs returned to ambulatory function within 1 month. Follow-up MRI in conservatively treated dogs revealed complete disappearance of the extruded material. Histopathological examination of surgical specimens confirmed that the retrieved material was extruded nucleus pulposus with evidence of early degeneration.
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Affiliation(s)
- M L Manunta
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy.
| | - M A Evangelisti
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy
| | - N Bergknut
- Department of Clinical Sciences of Companion Animals Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - G C M Grinwis
- Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - I Ballocco
- Department of Veterinary Medicine, University of Sassari, Sassari, Italy
| | - B P Meij
- Department of Clinical Sciences of Companion Animals Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
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Kruitwagen HS, Spee B, Viebahn CS, Venema HB, Penning LC, Grinwis GCM, Favier RP, van den Ingh TSGAM, Rothuizen J, Schotanus BA. The canine hepatic progenitor cell niche: molecular characterisation in health and disease. Vet J 2014; 201:345-52. [PMID: 24923752 DOI: 10.1016/j.tvjl.2014.05.024] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [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: 08/30/2013] [Revised: 05/07/2014] [Accepted: 05/17/2014] [Indexed: 12/24/2022]
Abstract
Hepatic progenitor cells (HPCs) are an adult stem cell compartment in the liver that contributes to liver regeneration when replication of mature hepatocytes is insufficient. In this study, laser microdissection was used to isolate HPC niches from the livers of healthy dogs and dogs with lobular dissecting hepatitis (LDH), in which HPCs are massively activated. Gene expression of HPC, hepatocyte and biliary markers was determined by quantitative reverse transcriptase PCR. Expression and localisation of selected markers were further studied at the protein level by immunohistochemistry and immunofluorescent double staining in samples of normal liver and liver from dogs with LDH, acute and chronic hepatitis, and extrahepatic cholestasis. Activated HPC niches had higher gene expression of the hepatic progenitor markers OPN, FN14, CD29, CD44, CD133, LIF, LIFR and BMI1 compared to HPCs from normal liver. There was lower expression of albumin, but activated HPC niches were positive for the biliary markers SOX9, HNF1β and keratin 19 by immunohistochemistry and immunofluorescence. Laminin, activated stellate cells and macrophages are abundant extracellular matrix and cellular components of the canine HPC niche. This study demonstrates that the molecular and cellular characteristics of canine HPCs are similar to rodent and human HPCs, and that canine HPCs are distinctively activated in different types of liver disease.
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Affiliation(s)
- H S Kruitwagen
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 104, 3584 CM Utrecht, The Netherlands
| | - B Spee
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 104, 3584 CM Utrecht, The Netherlands
| | - C S Viebahn
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 104, 3584 CM Utrecht, The Netherlands
| | - H B Venema
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 104, 3584 CM Utrecht, The Netherlands
| | - L C Penning
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 104, 3584 CM Utrecht, The Netherlands
| | - G C M Grinwis
- Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 1, 3584 CL Utrecht, The Netherlands
| | - R P Favier
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 104, 3584 CM Utrecht, The Netherlands
| | | | - J Rothuizen
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 104, 3584 CM Utrecht, The Netherlands
| | - B A Schotanus
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 104, 3584 CM Utrecht, The Netherlands.
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van der Kolk JH, van Putten LA, Mulder CJ, Grinwis GCM, Reijm M, Butler CM, von Blomberg BME. Gluten-dependent antibodies in horses with inflammatory small bowel disease (ISBD). Vet Q 2012; 32:3-11. [PMID: 22489998 DOI: 10.1080/01652176.2012.675636] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Equine inflammatory small bowel disease (ISBD) is an idiopathic pathologic condition seeming to increase in prevalence. OBJECTIVE To investigate the potential role of gluten in equine ISBD. ANIMALS & METHODS Antibodies known to be important in the diagnosis of human coeliac disease (CD): IgA antibodies to human recombinant and guinea pig tissue-transglutaminase (TGA), native gliadin (AGA), deamidated-gliadin-peptides (DGPA), and primate and equine endomysium (EMA) were assessed in blood samples from three different groups of horses: ISBD affected (n = 12) on a gluten-rich diet and controls either on gluten-rich (n = 22) or gluten-poor (n = 25) diets. Significant differences (p < 0.05) between groups were assessed using the Wilcoxon test. RESULTS Both ISBD-affected horses and gluten-rich controls had significantly (p < 0.0004) higher hrTGA titers than gluten-poor controls. However, ISBD horses did not show significantly increased levels of any of the CD related antibodies when compared to gluten-rich controls. Nevertheless, markedly increased antibody levels (TGA, EMA and DGPA) were found in one of the ISBD horses. The introduction of a gluten-free ration in this 14-year-old warmblood stallion resulted after 6 months in the reduction of antibody levels and clinical recovery associated with improved duodenal histopathology. CONCLUSION To the best of our knowledge, this is the first study assessing gluten-related antibodies in horses and results suggest a potential pathogenic role of gluten in at least some cases of equine ISBD. Clinical importance and impact for human medicine: Given serology and concurrent clinical findings, this study warrants further investigations into the immunologic basis of possible gluten-sensitive enteropathy in horses and analogy with human disease.
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Affiliation(s)
- J H van der Kolk
- Department of Equine Sciences, Medicine Section, Faculty of Veterinary Medicine, University of Utrecht, Utrecht, the Netherlands
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van Rijn SJ, Grinwis GCM, Penning LC, Meij BP. Expression of Ki-67, PCNA, and p27kip1 in canine pituitary corticotroph adenomas. Domest Anim Endocrinol 2010; 38:244-52. [PMID: 20022446 DOI: 10.1016/j.domaniend.2009.11.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2009] [Revised: 11/18/2009] [Accepted: 11/18/2009] [Indexed: 10/20/2022]
Abstract
Pituitary-dependent hypercortisolism (PDH), which is caused by adrenocorticotropic hormone (ACTH)-secreting pituitary adenomas, is a common endocrinopathy in dogs. Dogs with non-enlarged pituitaries harboring a microadenoma have a better prognosis than those with enlarged pituitaries. The aim of this study was to investigate the expression of the proliferation markers Ki-67 and proliferating cell nuclear antigen (PCNA) and the cell-cycle inhibitor p27kip1 in corticotroph adenomas in enlarged and non-enlarged pituitaries. The expression of Ki-67, PCNA, and p27kip1 was analyzed by immunohistochemical staining of 17 pituitary adenoma samples harvested during pituitary surgery in dogs with PDH. The labeling index was calculated by counting the number of immunopositive cells per 1,000 cells. The mean (+/- standard deviation) labeling index for Ki-67 was 8.4%+/-14.2% for the group with enlarged pituitaries, and 8.8%+/-5.5% for the group with non-enlarged pituitaries; that for PCNA was 35.5%+/-12.2% and 37.0%+/-15.5%; and that for p27kip1 was 29.3%+/-22.6% and 42.5%+/-27.9%, respectively. No significant differences in Ki-67, PCNA, and p27kip1 labeling indices were found between enlarged and non-enlarged pituitaries. However, a trend toward significance was observed when comparing the expression of p27kip1 in enlarged pituitaries versus normal pituitary tissue. It is concluded that Ki-67 and PCNA are not useful as proliferative markers for studying the pathobiology of pituitary corticotroph adenomas in dogs.
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Affiliation(s)
- S J van Rijn
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands
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Kuiper RV, Kimpfler S, Grinwis GCM. Case report: epitheliotropic lymphoma in a zebrafish (Danio rerio). Tijdschr Diergeneeskd 2009; 134:1018-1020. [PMID: 20120336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A proliferative disorder of lymphocytes was observed in a macroscopically normal young adult wild-type zebrafish (Danio rerio) during routine histological screening in a two-generation toxicity study. Proliferating lymphocytes were observed to invade the gill arches, infiltrate the cranial skeletal muscle and inner ear, and accumulate at distant sites in the frontal epidermis. The test compound, tetrabromobisphenol A (TBBPA, a flame retardant), is not known as a carcinogen and no tumours were detected in any of the 53 other fish in the study, including tank mates. Although neoplastic lymphoid proliferation in the thymus region is occasionally observed, we have never seen epitheliotropism in zebrafish during other similar exposure studies or brood stock. Our findings indicate that epitheliotropic lymphoma can occur spontaneously in zebrafish but at a low incidence.
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Affiliation(s)
- R V Kuiper
- Dutch Molecular Pathology Center, Pathobiology Department, Faculty of Veterinary Medicine, Utrecht University, Yalelaan I, P.O. Box 80,158, 3508 TD Utrecht, The Netherlands
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Grinwis GCM, Wester PW, Vethaak AD. Histopathological effects of chronic aqueous exposure to bis(tri-n-butyltin)oxide (TBTO) to environmentally relevant concentrations reveal thymus atrophy in European flounder (Platichthys flesus). Environ Pollut 2009; 157:2587-2593. [PMID: 19524338 DOI: 10.1016/j.envpol.2009.05.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2008] [Revised: 04/06/2009] [Accepted: 05/06/2009] [Indexed: 05/27/2023]
Abstract
Although the use of tributyltin in antifouling paints has been banned, this compound is still a serious pollutant of the marine environment. This paper describes a unique study in which European flounder (Platichthys flesus) were chronically (8 months) exposed to bis(tri-n-butyltin)oxide (TBTO) in the water under controlled laboratory conditions. Residue levels in selected tissues (liver, muscle) and general health status indices were measured and the effects on several organs (gills, liver, mesonephros, ovary/testis, spleen, and gastrointestinal tract) were examined histopathologically. Additionally, morphometric analysis of the thymus was performed. The major finding is that exposure of flounder to 5 microg TBTO/l over a period of 8 months, resulting in body burdens comparable to high field levels, induced significant reduction of thymus volume, possibly affecting immunocompetence of the animals. Chronic exposure of European flounder to tributyltin is therefore likely to affect the general health status of this species in heavily polluted aquatic environments.
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Affiliation(s)
- G C M Grinwis
- Department of Pathobiology, Faculty of Veterinary Medicine University of Utrecht, P.O. Box 80.158, 3508 TD Utrecht, The Netherlands.
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van der Lugt JJ, Grinwis GCM. [How does a pathologist interpret his skin biopsies?]. Tijdschr Diergeneeskd 2008; 133:66-69. [PMID: 18246947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Affiliation(s)
- J J van der Lugt
- Veterinair Pathologisch Diagnostisch Centrum, departement Pathobiologie, faculteit Diergeneeskunde, Universiteit van Utrecht.
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van der Kolk JH, de Graaf-Roelfsema E, Joles JA, Dorland L, Grinwis GCM, de Sain-van der Velden MGM, Koomans HA. Mixed proximal and distal renal tubular acidosis without aminoaciduria in a mare. J Vet Intern Med 2007; 21:1121-5. [PMID: 17939575 DOI: 10.1892/0891-6640(2007)21[1121:mpadrt]2.0.co;2] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Affiliation(s)
- Johannes H van der Kolk
- Departments of Equine Sciences, Medicine Section, Faculty of Veterinary Medicine, Utrecht University, University Medical Center of Utrecht, Utrecht, the Netherlands.
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van Klaveren NJ, Grinwis GCM, Brocks BAW, Kirpensteijn J. Collapse following gastrointestinal bleeding secondary to a congenital duodenal diverticulum in two littermate boxer pups. J Small Anim Pract 2007; 49:103-6. [PMID: 17850266 DOI: 10.1111/j.1748-5827.2007.00438.x] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Two littermates, a young male and female boxer, were admitted to the Utrecht University's Department of Clinical Sciences of Companion Animals within a three month period. Both dogs suffered from anaemia caused by chronic intestinal blood loss, vomiting and weight loss. In both cases, there was no response to conservative medical management. Eventually, the dogs suffered significant gastrointestinal haemorrhage that resulted in collapse. Gastroduodenoscopy and exploratory surgery showed a duodenal diverticulum in both dogs. This is the first report that describes this congenital anomaly in two siblings.
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Affiliation(s)
- N J van Klaveren
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, 3500TD, Utrecht, The Netherlands
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Long S, Argyle DJ, Nixon C, Nicholson I, Botteron C, Olby N, Platt S, Smith K, Rutteman GR, Grinwis GCM, Nasir L. Telomerase reverse transcriptase (TERT) expression and proliferation in canine brain tumours. Neuropathol Appl Neurobiol 2006; 32:662-73. [PMID: 17083480 DOI: 10.1111/j.1365-2990.2006.00776.x] [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] [Indexed: 11/29/2022]
Abstract
Telomerase is a ribonucleoprotein enzyme complex that synthesizes telomere DNA. It is detected in 85-90% of malignant tumours in humans, but not in most somatic cells. Because telomerase plays a critical role in cell immortality, it represents an important target for anticancer therapies. We have previously shown that the dog is a potentially useful model for evaluating telomerase-based therapeutics. In this present study we analysed 93 canine brain tumours for telomerase reverse transcriptase (TERT) expression by immunohistochemistry. TERT immunoreactivity was detected in 16 of 50 grade 1 (32%) and 29 of 43 grade 2 tumours (67.4%), demonstrating a statistically significant association with histological grade (P = 0.00012). A subset of 51 tumours was also assessed for MIB-1 expression. The MIB-1 labelling index (LI) was found to correlate significantly with tumour grade, with a mean MIB-1 LI of 1.5% for grade 1 tumours, as compared with a mean MIB-1 LI of 21.7% for grade 2 tumours (P << 0.001). The MIB-1 LI was also significantly associated with TERT expression in all brain tumours (P << 0.001). These data further support the dog as a model for the preclinical development of telomerase-based therapeutics in brain tumours.
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Affiliation(s)
- S Long
- Institute for Comparative Medicine, University of Glasgow Veterinary School, UK.
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Kuiper RV, Murk AJ, Leonards PEG, Grinwis GCM, van den Berg M, Vos JG. In vivo and in vitro Ah-receptor activation by commercial and fractionated pentabromodiphenylether using zebrafish (Danio rerio) and the DR-CALUX assay. Aquat Toxicol 2006; 79:366-75. [PMID: 16919340 DOI: 10.1016/j.aquatox.2006.07.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2006] [Revised: 07/03/2006] [Accepted: 07/06/2006] [Indexed: 05/11/2023]
Abstract
The present study addresses the toxicity of a commercial pentabrominated diphenylether (PeBDE) flame retardant mixture, DE-71, in a model aquatic vertebrate. Four weeks' exposure of juvenile zebrafish (Danio rerio) to water-borne DE-71 resulted in dose-dependent induction of CYP1A immunoreactivity, predominantly in the endocardium and the endothelium of larger blood vessels, such as ventral aorta and branchial arteries, as well as the larger hepatic and pancreatic blood vessels. To investigate the impact of possible contaminating PBDD/Fs in the DE-71 product, the study was repeated after DE-71 had been fractionated into a non-planar (cleaned PBDEs) and a planar fraction (PBDD/Fs). Zebrafish were exposed under similar conditions to the planar and cleaned DE-71 fractions, and to uncleaned DE-71. In addition, the above fractions were chemically analyzed and tested in a reporter gene assay (DR-CALUX) for their aromatic hydrocarbon-receptor (AhR) stimulating potencies. A relatively strong CALUX response was detected from the planar DE-71 fraction (19.7ng TCDD equivalent (TEQ)/g DE-71), coinciding with a strong induction of CYP1A immunoreactivity in zebrafish. CYP1A immunoreactivity in zebrafish exposed to uncleaned DE-71 was intense, although the CALUX response was 10-fold less compared to the planar fraction. Only weak CYP1A immunoreactivity was found in fish exposed to cleaned DE-71, and none in control animals; no CALUX response was detected in cleaned DE-71. The present findings indicate that chemical impurities of the commercial PeBDE product account for AhR-mediated effects. Analytical isolation of a planar fraction from the commercial product increased the in vitro (DR-CALUX) signal 10 times. Immunohistochemistry showed a strong tissue specific reaction to DE-71 in vivo at these relatively low TEQ levels regardless of chemical pretreatment of the mix, reflecting the sensitivity of CYP1A induction in juvenile zebrafish to AhR agonists.
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Affiliation(s)
- R V Kuiper
- Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 1, P.O. Box 80158, 3508 TD Utrecht NL, The Netherlands.
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Sloet van Oldruitehnborgh-Oosterbaan MM, van den Boom R, Grinwis GCM. Equine rhabdomyolysis: four clinical cases. PFERDEHEILKUNDE 2006. [DOI: 10.21836/pem20060501] [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: 11/27/2022]
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Affiliation(s)
- I J S Neyens
- Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, PO Box 80.154, 3508 TD, Utrecht, The Netherlands
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Wester PW, van der Ven LTM, Vethaak AD, Grinwis GCM, Vos JG. Aquatic toxicology: opportunities for enhancement through histopathology. Environ Toxicol Pharmacol 2002; 11:289-295. [PMID: 21782612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Received: 10/19/2001] [Revised: 01/25/2002] [Accepted: 03/01/2002] [Indexed: 05/31/2023]
Abstract
This paper briefly reviews the application of histopathology as aninstrument or endpoint in toxicity studies in fish. For long this has been applied rather occasionally in (regulatory) toxicology, and was mainly of interest in fundamental studies and limited carcinogenicity experiments. However, nowadays there are various incentives that ask for the application of pathology, such as field monitoring of pollution effects, the wish for optimal use and lower species of laboratory animals, the availability of modern histology techniques, and insight and interest in mechanistic data. This is timely illustrated by the current broad interest in endocrine disrupting pollutants-a threat mainly in the aquatic environment-where histopathological organ and tissue changes in intact sentinel fish species provide pivotal diagnostic and mechanistic features.
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Affiliation(s)
- P W Wester
- Laboratory for Pathology and Immunobiology, National Institute of Public Health and the Environment (RIVM), P.O. Box 1, 3720 BA Bilthoven, The Netherlands
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