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Fareez F, Yahya S, Fong C, Moodley J, Provias J, Popovic S, Cenic A, Lu JQ. Spinal calcifying pseudoneoplasm of the neuraxis (CAPNON) associated with facet joint pathologies: CAPNON diagnostic and pathogenic insights. Hum Pathol 2024; 145:16-25. [PMID: 38336278 DOI: 10.1016/j.humpath.2024.02.003] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Revised: 02/04/2024] [Accepted: 02/06/2024] [Indexed: 02/12/2024]
Abstract
Calcifying pseudoneoplasm of the neuraxis (CAPNON) is a rare tumor-like fibro-osseous lesion that can develop anywhere in the neuraxis. Approximately a half of reported CAPNONs developed in the spinal region, mostly close to the facet joint (FJ). The diagnosis of spinal CAPNONs is challenging given the existence of mimics and associated pathologies including calcific degeneration of the FJ ligaments (DFJL) and synovial cysts (SCs). The pathogenesis of CAPNON remains elusive, although there have been a few hypotheses including degenerative, reactive, proliferative and immune-mediated processes. Our present study examined clinical, radiological and pathological features of 12 spinal CAPNONs in comparison to 9 DFJL foci, and diagnostic and pathogenic relationship between CAPNONs and FJ pathologies. On imaging, CAPNONs were all tumor-like and typically bigger than DFJL foci. All CAPNONs showed pathologically diagnostic features including characteristic cores, consistently identifiable core-surrounding/peripheral palisading of macrophages and other cells including multinucleated giant cells, variable infiltration of CD8+ T-cells, and multifocal immunopositivity of neurofilament light chain (NF-L). These features were absent or limited in the DFJL foci with statistically significant differences from CAPNONs, except calcifications. Spinal CAPNONs co-existed with DFJL foci in all cases; some had transitional foci with overlapping focal CAPNON and DFJL-like features. These findings, along with our previously reported relationship between CAPNONs and SCs, suggest that spinal CAPNONs may occur in association with or in transition from calcifying/calcified degenerative lesions of FJ ligaments and/or SCs when a reactive proliferative process is complemented by other pathogenic changes such as immune-mediated pathology and NF-L deposition/expression.
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Affiliation(s)
- Faiha Fareez
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
| | - Sultan Yahya
- Department of Radiology, McMaster University, Hamilton, Ontario, Canada
| | - Crystal Fong
- Department of Radiology, McMaster University, Hamilton, Ontario, Canada
| | - Jinesa Moodley
- Department of Pathology, British Columbia Cancer Agency, Vancouver, British Columbia, Canada
| | - John Provias
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
| | - Snezana Popovic
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada
| | - Aleksa Cenic
- Department of Surgery/Neurosurgery, McMaster University, Hamilton, Ontario, Canada
| | - Jian-Qiang Lu
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON, Canada.
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Duivenvoorden WC, Margel D, Subramony Gayathri V, Duceppe E, Yousef S, Naeim M, Khajehei M, Hopmans S, Popovic S, Ber Y, Heels-Ansdell D, Devereaux PJ, Pinthus JH. Follicle-Stimulating Hormone Exacerbates Cardiovascular Disease in the Presence of Low or Castrate Testosterone Levels. JACC Basic Transl Sci 2024; 9:364-379. [PMID: 38559622 PMCID: PMC10978407 DOI: 10.1016/j.jacbts.2023.10.010] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Accepted: 10/17/2023] [Indexed: 04/04/2024]
Abstract
Low testosterone (T), common in aging men, associates with cardiovascular disease. We investigated whether follicle-stimulating hormone (FSH), which is affected by T, modulates the cardiovascular effects associated with low T or castration. FSHβ-/-:low-density lipoprotein receptor (LDLR)-/- mice, untreated or castrated (orchiectomy, gonadotropin-releasing hormone agonist or antagonist), demonstrated significantly less atherogenesis compared with similarly treated LDLR-/- mice, but not following FSH delivery. Smaller plaque burden in LDLR-/- mice receiving gonadotropin-releasing hormone antagonists vs agonists were nullified in FSHβ-/-:LDLR-/- mice. Atherosclerotic and necrotic plaque size and macrophage infiltration correlated with serum FSH/T. In patients with prostate cancer, FSH/T following androgen-deprivation therapy initiation predicted cardiovascular events. FSH facilitates cardiovascular disease when T is low or eliminated.
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Affiliation(s)
- Wilhelmina C.M. Duivenvoorden
- Department of Surgery, Division of Urology, Faculty of Medicine, McMaster University, Hamilton, Ontario, Canada
- Research Institute of St. Joe’s Hamilton, Hamilton, Ontario, Canada
| | - David Margel
- Department of Urology, Rabin Medical Center, Petach Tikva, Israel
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | | | - Emmanuelle Duceppe
- Population Health Research Institute, McMaster University and Hamilton Health Sciences, Hamilton, Ontario, Canada
- Department of Medicine, Centre Hospitalier de l'Universite de Montréal, Montréal, Québec, Canada
| | - Sadiya Yousef
- Research Institute of St. Joe’s Hamilton, Hamilton, Ontario, Canada
| | - Magda Naeim
- Research Institute of St. Joe’s Hamilton, Hamilton, Ontario, Canada
| | - Mohammad Khajehei
- Department of Surgery, Division of Urology, Faculty of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Sarah Hopmans
- Department of Surgery, Division of Urology, Faculty of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Snezana Popovic
- Department of Pathology and Molecular Medicine, Faculty of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Yaara Ber
- Department of Urology, Rabin Medical Center, Petach Tikva, Israel
| | - Diane Heels-Ansdell
- Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, Ontario, Canada
| | - Philip J. Devereaux
- Population Health Research Institute, McMaster University and Hamilton Health Sciences, Hamilton, Ontario, Canada
- Department of Medicine, Centre Hospitalier de l'Universite de Montréal, Montréal, Québec, Canada
| | - Jehonathan H. Pinthus
- Department of Surgery, Division of Urology, Faculty of Medicine, McMaster University, Hamilton, Ontario, Canada
- Research Institute of St. Joe’s Hamilton, Hamilton, Ontario, Canada
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Fareez F, Moodley J, Popovic S, Lu JQ. Rheumatoid nodules: a narrative review of histopathological progression and diagnostic consideration. Clin Rheumatol 2023:10.1007/s10067-023-06589-6. [PMID: 36991243 DOI: 10.1007/s10067-023-06589-6] [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: 01/21/2023] [Revised: 02/27/2023] [Accepted: 03/24/2023] [Indexed: 03/31/2023]
Abstract
Rheumatoid nodules (RNs) are the most common extra-articular manifestation of rheumatoid arthritis and are also seen in patients with other autoimmune and inflammatory diseases. The development of RNs includes histopathological stages of acute unspecified inflammation, granulomatous inflammation with no or minimal necrosis, necrobiotic granulomas typically with central fibrinoid necrosis surrounded by palisading epithelioid macrophages and other cells, and likely an advanced stage of "ghost" lesions containing cystic or calcifying/calcified areas. In this article, we review RN pathogenesis, histopathological features in different stages, diagnostically related clinical manifestations, as well as diagnosis and differential diagnosis of RNs with an in-depth discussion about challenges in distinguishing RNs from their mimics. While the pathogenesis of RN formation remains elusive, it is hypothesized that some RNs with dystrophic calcification may be in transition and may be in coexistence or collision with another lesion in patients with RA or other soft tissue diseases and comorbidities. The diagnosis of typical or mature RNs in usual locations can be readily made by clinical findings often with classic RN histopathology, but in many cases, particularly with atypical or immature RNs and/or unusual locations, the clinical and histopathological diagnosis can be challenging requiring extensive examination of the lesional tissue with histological and immunohistochemical markers to identify unusual RNs in the clinical context or other lesions that may be coexisting with classic RNs. Proper diagnosis of RNs is critical for appropriate treatment of patients with RA or other autoimmune and inflammatory diseases.
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Affiliation(s)
- Faiha Fareez
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Jinesa Moodley
- Department of Pathology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Snezana Popovic
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Jian-Qiang Lu
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada.
- Department of Pathology and Molecular Medicine, Hamilton General Hospital, 237 Barton Street, Hamilton, Ontario, L8L 2X2, Canada.
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Gazendam A, Popovic S, Parasu N, Ghert M. Chondrosarcoma: A Clinical Review. J Clin Med 2023; 12:jcm12072506. [PMID: 37048590 PMCID: PMC10095313 DOI: 10.3390/jcm12072506] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 03/17/2023] [Accepted: 03/24/2023] [Indexed: 03/29/2023] Open
Abstract
Chondrosarcomas are a diverse group of malignant cartilaginous matrix-producing neoplasms. Conventional chondrosarcomas are a continuum of disease based on the biologic activity of the tumor. The tumors range from the relatively biologically benign low-grade tumors or intermediate atypical cartilaginous tumors (ACTs), to malignant, aggressive high-grade tumors. The clinical presentation, radiographic and pathologic findings, treatments and outcomes vary significantly based on the histologic grade of the tumor. Chondrosarcomas present a diagnostic dilemma, particularly in the differentiation between high- and intermediate-grade tumors and that of low-grade tumors from benign enchondromas. A multidisciplinary team at a tertiary sarcoma centre allows for optimal care of these patients.
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Gazendam A, Masrouha K, Popovic S, Ghert M, Wilson D. Massive pseudotumor of unknown etiology in a cemented metal-on-polyethylene total hip arthroplasty: a case report. Ann Jt 2022; 7:40. [PMID: 38529139 PMCID: PMC10929352 DOI: 10.21037/aoj-22-3] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 04/08/2022] [Indexed: 03/27/2024]
Abstract
Background The formation of destructive pseudotumors is a well-documented, albeit rare, complication of total hip arthroplasties. They tend to be progressive and, if left untreated, can result in extensive periprosthetic bony destruction. The current case presents a large benign mass consistent with a pseudotumor on both imaging and intraoperative findings but histologic findings demonstrating chronic hematoma. Case Description An 86-year-old female with a metal-on-polyethylene total hip presented with a massive pseudotumor accompanied by extensive bony lysis. Due to pain and chronic anemia, a palliative debulking procedure was undertaken as a palliative measure. At one year follow-up, the patient reported significant pain relief and was able to ambulate safely with gait aids. Her hemoglobin stabilized post-operatively and ongoing transfusions were not required. Final pathology was not supportive of particle disease despite this being the leading diagnosis. Microscopic sections showed tissue mostly composed of fibrin and blood with multiple foci of calcification and reactive papillary endothelial hyperplasia which can be seen in chronic hematomas. Conclusions This case presents the diagnostic dilemma of a large benign mass consistent with a pseudotumor on both imaging and intraoperative findings but histologic findings consistent with a chronic hematoma. It highlights the importance of close follow-up and early intervention when periprosthetic osteolysis is detected.
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Affiliation(s)
- Aaron Gazendam
- Division of Orthopaedic Surgery, Department of Surgery, McMaster University, Hamilton, Ontario, Canada
| | - Karim Masrouha
- Department of Orthopaedic Surgery, NYU Grossman School of Medicine, New York, NY, USA
| | - Snezana Popovic
- Division of Anatomical Pathology, McMaster University, Hamilton, Ontario, Canada
| | - Michelle Ghert
- Division of Orthopaedic Surgery, Department of Surgery, McMaster University, Hamilton, Ontario, Canada
| | - David Wilson
- Division of Orthopaedic Surgery, Dalhousie University, Halifax, Canada
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Lu JQ, Al Mohammadi WJB, Fong C, Yang K, Moodley J, Provias J, Popovic S, Chebib I, Cenic A. Spinal calcifying pseudoneoplasm of the neuraxis (CAPNON) and CAPNON-like lesions: CAPNON overlapping with calcified synovial cysts. Pathology 2022; 54:573-579. [DOI: 10.1016/j.pathol.2022.01.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Revised: 12/25/2021] [Accepted: 01/03/2022] [Indexed: 11/24/2022]
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Ekhtiari S, Chiba K, Popovic S, Crowther R, Wohl G, Kin On Wong A, Tanke DH, Dufault DM, Geen OD, Parasu N, Crowther MA, Evans DC. First case of osteosarcoma in a dinosaur: a multimodal diagnosis. Lancet Oncol 2020; 21:1021-1022. [PMID: 32758461 DOI: 10.1016/s1470-2045(20)30171-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 03/04/2020] [Accepted: 03/09/2020] [Indexed: 11/17/2022]
Affiliation(s)
- Seper Ekhtiari
- Division of Orthopaedic Surgery, Department of Surgery, McMaster University, Hamilton, ON, Canada
| | - Kentaro Chiba
- Department of Biosphere-Geosphere Science, Okayama University of Science, Okayama, Japan
| | - Snezana Popovic
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Rhianne Crowther
- Department of Biology, Trent University, Peterborough, ON, Canada
| | - Gregory Wohl
- Department of Mechanical Engineering, McMaster University, Hamilton, ON, Canada
| | - Andy Kin On Wong
- Joint Department of Medical Imaging, University Health Network, Toronto, ON, Canada
| | - Darren H Tanke
- Royal Tyrrell Museum of Palaeontology, Drumheller, AB, Canada
| | | | - Olivia D Geen
- Department of Medicine, McMaster University, Hamilton, ON, Canada
| | - Naveen Parasu
- Department of Radiology, McMaster University, Hamilton, ON, Canada
| | - Mark A Crowther
- Department of Medicine, McMaster University, Hamilton, ON, Canada
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Lu JQ, Popovic S, Provias J, Cenic A. Collision Lesions of Calcifying Pseudoneoplasm of the Neuraxis and Rheumatoid Nodules: A Case Report With New Pathogenic Insights. Int J Surg Pathol 2020; 29:314-320. [PMID: 32666850 DOI: 10.1177/1066896920941939] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Calcifying pseudoneoplasm of the neuraxis (CAPNON) is a rare tumor-like lesion with unclear pathogenesis. Collision lesions of CAPNONs with neoplasms are occasionally reported. In this article, we report the first case of collision lesions between CAPNON and rheumatoid nodules (RNs) in a patient with systemic lupus erythematosus. The patient was a 51-year-old female who presented with lower back pain and subsequently a lower back mass over 2 years. Spinal magnetic resonance imaging demonstrated a heterogeneous, partially calcified mass centered in the L3-4 paravertebral regions. A biopsy of the mass was diagnostic of CAPNON. As the mass grew over the following 5 months, it was resected en bloc. Its pathological examination revealed collision lesions of RNs at different histopathological stages and CAPNON lesions, and transitional lesions exhibiting combined RN and CAPNON features, with immune cell infiltrates. Our findings provide new evidence for an immune-mediated reactive process and insights into the pathogenies of CAPNON.
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Affiliation(s)
| | | | - John Provias
- 3710McMaster University, Hamilton, Ontario, Canada
| | - Aleksa Cenic
- 3710McMaster University, Hamilton, Ontario, Canada
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9
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Yao X, Ghert M, Dickson BC, Popovic S, Purgina BM, Verma S, Werier J, Kandel RA. An evidence-based guideline on the application of molecular testing in the diagnosis, prediction of prognosis, and selection of therapy in non-GIST soft tissue sarcomas. Cancer Treat Rev 2020; 85:101987. [PMID: 32092619 DOI: 10.1016/j.ctrv.2020.101987] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 07/03/2018] [Revised: 02/10/2020] [Accepted: 02/11/2020] [Indexed: 02/06/2023]
Abstract
AIMS To make recommendations on the indications for molecular testing regarding the diagnosis, prediction of prognosis, and treatment selection in adult patients with s oft tissue sarcomas (STS) excluding gastrointestinal stromal tumour. MATERIALS AND METHODS This guideline was developed by the Cancer Care Ontario's Program in Evidence-Based Care (PEBC) and the Sarcoma Disease Site Group (DSG). The medline, embase, and Cochrane Library databases, main guideline websites, abstracts of relevant annual meetings, and PROSPERO databases were searched (January 2005 to October 2016). Internal and external reviews were conducted, with final approval by the PEBC and the Sarcoma DSG. RESULTS Based on the available evidence, we made three S trong Recommendations, 14 Recommendations, 9 Qualified Statements, and seven No Recommendations. The three Strong Recommendations include: i) MDM2 amplification by fluorescence in situ hybridization (FISH) is recommended as a sensitive and specific test to differentiate patients with atypical lipomatous tumour/well-differentiated liposarcoma, or dedifferentiated liposarcoma from lipoma or other STS in the differential diagnosis; ii) SS18 (SYT) break-apart by FISH or SS18-SSX (SYT-SSX) fusion by reverse transcription-polymerase chain reaction is recommended as a sensitive and specific test to differentiate patients with synovial sarcoma from other sarcomas; iii) CTNNB1 S45F mutation by polymerase chain reaction is recommended as a prognostic factor for poor recurrence-free survival in patients with desmoid tumours. CONCLUSION This guideline may serve as a framework for the thoughtful implementation of molecular studies at cancer centres and other jurisdictions. Some of the recommendations may need to be updated when new evidence appears in the future.
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Affiliation(s)
- Xiaomei Yao
- Program in Evidence-Based Care, Cancer Care Ontario, Department of Oncology, McMaster University, Hamilton, Ontario, Canada.
| | - Michelle Ghert
- Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, Toronto, Ontario, Canada.
| | - Brendan C Dickson
- Division of Orthopedic Surgery, Juravinski Cancer Centre, McMaster University, Hamilton, Ontario, Canada.
| | - Snezana Popovic
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario.
| | - Bibianna M Purgina
- Department of Pathology and Laboratory Medicine, The Ottawa Hospital Cancer Centre, Ottawa, Ontario, Canada.
| | - Shailendra Verma
- Division of Medical Oncology, The Ottawa Hospital Cancer Centre, Ottawa, Ontario, Canada.
| | - Joel Werier
- Division of Orthopedic Surgery, The Ottawa Hospital Cancer Centre, Ottawa, Ontario, Canada.
| | - Rita A Kandel
- Department of Pathology and Laboratory Medicine, Mount Sinai Hospital, Toronto, Ontario, Canada.
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Miladinovic T, Ungard RG, Linher-Melville K, Popovic S, Singh G. Functional effects of TrkA inhibition on system x C--mediated glutamate release and cancer-induced bone pain. Mol Pain 2018; 14:1744806918776467. [PMID: 29761734 PMCID: PMC5956640 DOI: 10.1177/1744806918776467] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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] [Indexed: 12/14/2022] Open
Abstract
Breast cancer cells release the signalling molecule glutamate via the system xC− antiporter, which is upregulated to exchange extracellular cystine for intracellular glutamate to protect against oxidative stress. Here, we demonstrate that this antiporter is functionally influenced by the actions of the neurotrophin nerve growth factor on its cognate receptor tyrosine kinase, TrkA, and that inhibiting this complex may reduce cancer-induced bone pain via its downstream actions on xCT, the functional subunit of system xC−. We have characterized the effects of the selective TrkA inhibitor AG879 on system xC− activity in murine 4T1 and human MDA-MB-231 mammary carcinoma cells, as well as its effects on nociception in our validated immunocompetent mouse model of cancer-induced bone pain, in which BALB/c mice are intrafemorally inoculated with 4T1 murine carcinoma cells. AG879 decreased functional system xC− activity, as measured by cystine uptake and glutamate release, and inhibited nociceptive and physiologically relevant responses in tumour-bearing animals. Cumulatively, these data suggest that the activation of TrkA by nerve growth factor may have functional implications on system xC−-mediated cancer pain. System xC−-mediated TrkA activation therefore presents a promising target for therapeutic intervention in cancer pain treatment.
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Affiliation(s)
- Tanya Miladinovic
- 1 Michael G. DeGroote Institute for Pain Research and Care, McMaster University, Hamilton, Ontario, Canada.,2 Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Robert G Ungard
- 1 Michael G. DeGroote Institute for Pain Research and Care, McMaster University, Hamilton, Ontario, Canada.,2 Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Katja Linher-Melville
- 1 Michael G. DeGroote Institute for Pain Research and Care, McMaster University, Hamilton, Ontario, Canada.,2 Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Snezana Popovic
- 2 Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Gurmit Singh
- 1 Michael G. DeGroote Institute for Pain Research and Care, McMaster University, Hamilton, Ontario, Canada.,2 Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
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Abstract
A rare case of intra-articular solitary fibrous tumor of the knee in an 84-year-old man is presented. This case report illustrates that solitary fibrous tumor should be included in the extended differential diagnosis of an intra-articular soft tissue mass.
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Affiliation(s)
- Michael Roth
- Department of Radiology, St. Joseph's Healthcare, McMaster University, 50 Charlton Ave E, Hamilton, Ontario, L8N 4A6, Canada.
- Department of Radiology, St. Joseph's Health Care London, Western University, 268 Grosvenor St, London, N6A 4V2, Ontario, Canada.
| | - Salem Alowami
- Department of Pathology and Molecular Medicine St Joseph's Healthcare, McMaster University, 50 Charlton Ave E, Hamilton, Ontario, L8N 4A6, Canada
| | - Snezana Popovic
- Department of Pathology and Molecular Medicine, McMaster University Health Sciences Centre, McMaster University, 1200 Main St W, Hamilton, Ontario, L8N 3Z5, Canada
| | - Srinivasan Harish
- Department of Radiology, St. Joseph's Healthcare, McMaster University, 50 Charlton Ave E, Hamilton, Ontario, L8N 4A6, Canada
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Cheon PM, Rebello R, Naqvi A, Popovic S, Bonert M, Kapoor A. Anastomosing hemangioma of the kidney: radiologic and pathologic distinctions of a kidney cancer mimic. ACTA ACUST UNITED AC 2018; 25:e220-e223. [PMID: 29962849 DOI: 10.3747/co.25.3927] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Anastomosing hemangioma (ah) is a rare subtype of primary vascular tumour that can, clinically and radiologically, present similarly to malignant renal tumours such as renal cell carcinoma (rcc) and angiosarcoma. Rarely seen in the genitourinary system, the ah we report here occurred in a 40-year-old male patient diagnosed initially with rcc based on imaging and successfully treated by laparoscopic left radical nephrectomy, with adrenal sparing and perihilar lymph node dissection. The pathologic diagnosis of ah can be challenging on small biopsy specimens; we therefore opine that it is appropriate to excise these lesions to facilitate diagnosis and definitively exclude common renal cancers. However, in this review, we describe some radiologic and pathologic distinctions between ah and malignant tumours.
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Affiliation(s)
| | | | - A Naqvi
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON
| | - S Popovic
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON
| | - M Bonert
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON
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13
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Affiliation(s)
- Kristopher McLean
- From the Departments of Radiology (K.M.) and Pathology and Molecular Medicine (S.P.), McMaster University, 1200 Main St W, Room 2S23-1, Hamilton, ON, Canada L8S 4L8
| | - Snezana Popovic
- From the Departments of Radiology (K.M.) and Pathology and Molecular Medicine (S.P.), McMaster University, 1200 Main St W, Room 2S23-1, Hamilton, ON, Canada L8S 4L8
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14
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Abstract
This case discusses an unusual presentation of remote metastatic giant cell tumour presenting as a seizure.
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Affiliation(s)
- Aashish Kalani
- Department of Internal Medicine, McMaster University, Hamilton, ON, L8S 4K1, Canada
| | - Margaret Lovett
- Department of Internal Medicine, McMaster University, Hamilton, ON, L8S 4K1, Canada
| | - Lori Stewart
- Department of Diagnostic Imaging, McMaster University, Hamilton, ON, L8S 4K1, Canada
| | - Snezana Popovic
- Department of Anatomical Pathology, McMaster University, Hamilton, ON, L8S 4K1,Canada
| | - Akbar Panju
- Department of Internal Medicine, McMaster University, Hamilton, ON, L8S 4K1, Canada
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15
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Popovic S, Kukic B, Stevanovic K, Kalezic N, Davidovic L. Abstract PR046. Anesth Analg 2016. [DOI: 10.1213/01.ane.0000492456.21481.ec] [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: 11/05/2022]
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16
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Popovic S, Kukic B, Stevanovic K, Koncar I, Lukic B, Kalezic N, Davidovic L. Abstract PR047. Anesth Analg 2016. [DOI: 10.1213/01.ane.0000492457.98609.09] [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: 11/05/2022]
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Kak I, Sadikovic B, Pare G, Corbett T, Popovic S. Abstract 521: c-MYC as a differentiating marker between angiosarcoma and atypical vascular lesion. Cancer Res 2016. [DOI: 10.1158/1538-7445.am2016-521] [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
Introduction: Angiosarcoma is a rare, aggressive malignancy that accounts for less than 1% of all sarcomas, characterized by a dismal 5 year survival of 20-30% at best. In striking contrast, atypical vascular lesion (AVL), which typically occurs secondary to radiation, follows for the most part, a benign course. However, debate rages over the true nature of AVL with reports describing both benign and malignant behavior. Further compounding the issue is the fact that overlapping histological features make the important differentiation between AVL and angiosarcoma difficult, especially on limited biopsy specimens. There have been a number of recent studies of c-MYC expression in vascular tumors in relation to this question, yielding varied results.
Objectives: This pilot study aimed to investigate c-MYC expression in atypical vascular lesions and angiosarcomas (primary and secondary) to evaluate the clinical utility of c-MYC testing as an adjunct to the histological diagnosis.
Methods: A retrospective search for biopsy, resection specimens and internal consult cases with diagnosis of angiosarcoma and/or atypical vascular lesion from January 2008- February 2014 was performed. A total of 32 cases (including controls) obtained after review were stained by dual colour c-MYC copy number probe set. The expression of c-MYC was read by two independent evaluators and final data was collated along with histology findings, follow-up and survival data.
Results: c-MYC amplification was found to be a major differentiating factor (p value: 0.00002, 68% sensitivity, 96% specificity) between AVL and angiosarcoma(median c-MYC expression 1.0 vs. 12.14, 95% confidence interval: 0.8-1.9 vs. 9.2-22.3 respectively). The amplification levels of primary (median c-MYC expression:10.9, 95% confidence interval: 3.8-16.6) and secondary angiosarcoma (median c-MYC expression:13.2, 95% confidence interval: 9.0-25.5) were statistically not found to be significantly different (p = 0.07). Although no correlation was found between level of c-MYC amplification and outcome, the study was underpowered to accurately evaluate this relation.
Conclusion: Amplification of c-MYC can be used as a reliable ancillary test to differentiate between diagnostically challenging cases of angiosarcoma and AVL.
Citation Format: Ipshita Kak, Bekim Sadikovic, Guillaume Pare, Tom Corbett, Snezana Popovic. c-MYC as a differentiating marker between angiosarcoma and atypical vascular lesion. [abstract]. In: Proceedings of the 107th Annual Meeting of the American Association for Cancer Research; 2016 Apr 16-20; New Orleans, LA. Philadelphia (PA): AACR; Cancer Res 2016;76(14 Suppl):Abstract nr 521.
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Affiliation(s)
- Ipshita Kak
- 1McMaster University, Hamilton, Ontario, Canada
| | - Bekim Sadikovic
- 2Schulich School of Medicine and Dentistry, London, Ontario, Canada
| | - Guillaume Pare
- 3David Braley Cardiac, Vascular and Stroke Research Institute, Hamilton, Ontario, Canada
| | - Tom Corbett
- 4Juravinski Cancer Center, Hamilton, Ontario, Canada
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Racetovic G, Popovic S, Rosic B, Grujic Timarac S. Advantages and obstacles for community based approach using case management method in the work with users that have psychotic disorders – Case study. Eur Psychiatry 2016. [DOI: 10.1016/j.eurpsy.2016.01.2103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
IntroductionCase management (CM) is accepted as the most recommended approach for the treatment of people with severe mental illnesses (SMI) in Community Mental Health Centers (CMHC) in whole Bosnia and Herzegovina (BH) in the last 3 years.ObjectiveAll team members of CMHC Prijedor are certificated case managers. Part of our daily activities is work with and for the users included in CM (mostly with schizophrenia or similar disorders) using multidisciplinary approach to find best possible solutions of both treatment and rehabilitation for users that we are in charge. In this moment CMHC cares for 12 mostly younger users involved in the CM.AimsTo show advantages as well as obstacles of the CM.MethodsCase study of young user with schizoaffective disorder included in the CM in the last 2 years.ResultsImprovements in user's daily activities and using of the remaining capacities with confrontation of partial or entire poor responses of most other community services.ConclusionsCM has many advantages for the user involved in it, mostly medical and psychological (adequate treatment followed by users wishes, avoidance of hospitalization, improving existing or building new skills, use of remaining capacities, planed activities, minimize of the psychopharmacological treatment, social skills and more new contacts with people, etc.). But, still are existing the obstacles in the community mostly considering employment and social care as an part of the stigmatization of the people with SMI.Disclosure of interestThe authors have not supplied their declaration of competing interest.
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Mirham L, Naugler C, Hayes M, Ismiil N, Belisle A, Sade S, Streutker C, MacMillan C, Rasty G, Popovic S, Joseph M, Gabril M, Barnes P, Hegele RG, Carter B, Yousef GM. Performance of residents using digital images versus glass slides on certification examination in anatomical pathology: a mixed methods pilot study. CMAJ Open 2016; 4:E88-94. [PMID: 27280119 PMCID: PMC4866926 DOI: 10.9778/cmajo.20140075] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [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] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND It is anticipated that many licensing examination centres for pathology will begin fully digitizing the certification examinations. The objective of our study was to test the feasibility of a fully digital examination and to assess the needs, concerns and expectations of pathology residents in moving from a glass slide-based examination to a fully digital examination. METHODS We conducted a mixed methods study that compared, after randomization, the performance of senior residents (postgraduate years 4 and 5) in 7 accredited anatomical pathology training programs across Canada on a pathology examination using either glass slides or digital whole-slide scanned images of the slides. The pilot examination was followed by a post-test survey. In addition, pathology residents from all levels of training were invited to participate in an online survey. RESULTS A total of 100 residents participated in the pilot examination; 49 were given glass slides instead of digital images. We found no significant difference in examination results between the 2 groups of residents (estimated marginal mean 8.23/12, 95% confidence interval [CI] 7.72-8.87, for glass slides; 7.84/12, 95% CI 7.28-8.41, for digital slides). In the post-test survey, most of the respondents expressed concerns with the digital examination, including slowly functioning software, blurring and poor detail of images, particularly nuclear features. All of the respondents of the general survey (n = 179) agreed that additional training was required if the examination were to become fully digital. INTERPRETATION Although the performance of residents completing pathology examinations with glass slides was comparable to that of residents using digital images, our study showed that residents were not comfortable with the digital technology, especially given their current level of exposure to it. Additional training may be needed before implementing a fully digital examination, with consideration for a gradual transition.
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Affiliation(s)
- Lorna Mirham
- Department of Laboratory Medicine and Pathobiology (Mirham, Ismiil, Sade, Streutker, MacMillan, Rasty, Hegele, Yousef), University of Toronto, Toronto, Ont.; Department of Pathology and Laboratory Medicine (Naugler), University of Calgary, Calgary, Alta.; Department of Pathology and Laboratory Medicine (Hayes), University of British Columbia, Vancouver, BC; Department of Pathology and Cellular Biology (Belisle), Université de Montréal, Montréal, Que.; Department of Pathology and Molecular Medicine (Popovic), McMaster University, Hamilton, Ont.; Department of Pathology (Joseph, Gabril), Western University, London, Ont.; Department of Pathology and Laboratory Medicine (Barnes), Dalhousie University, Halifax, NS; Department of Pathology (Carter), Memorial University of Newfoundland, St. John's, NL; Department of Laboratory Medicine (Yousef), St. Michael's Hospital, Toronto, Ont
| | - Christopher Naugler
- Department of Laboratory Medicine and Pathobiology (Mirham, Ismiil, Sade, Streutker, MacMillan, Rasty, Hegele, Yousef), University of Toronto, Toronto, Ont.; Department of Pathology and Laboratory Medicine (Naugler), University of Calgary, Calgary, Alta.; Department of Pathology and Laboratory Medicine (Hayes), University of British Columbia, Vancouver, BC; Department of Pathology and Cellular Biology (Belisle), Université de Montréal, Montréal, Que.; Department of Pathology and Molecular Medicine (Popovic), McMaster University, Hamilton, Ont.; Department of Pathology (Joseph, Gabril), Western University, London, Ont.; Department of Pathology and Laboratory Medicine (Barnes), Dalhousie University, Halifax, NS; Department of Pathology (Carter), Memorial University of Newfoundland, St. John's, NL; Department of Laboratory Medicine (Yousef), St. Michael's Hospital, Toronto, Ont
| | - Malcolm Hayes
- Department of Laboratory Medicine and Pathobiology (Mirham, Ismiil, Sade, Streutker, MacMillan, Rasty, Hegele, Yousef), University of Toronto, Toronto, Ont.; Department of Pathology and Laboratory Medicine (Naugler), University of Calgary, Calgary, Alta.; Department of Pathology and Laboratory Medicine (Hayes), University of British Columbia, Vancouver, BC; Department of Pathology and Cellular Biology (Belisle), Université de Montréal, Montréal, Que.; Department of Pathology and Molecular Medicine (Popovic), McMaster University, Hamilton, Ont.; Department of Pathology (Joseph, Gabril), Western University, London, Ont.; Department of Pathology and Laboratory Medicine (Barnes), Dalhousie University, Halifax, NS; Department of Pathology (Carter), Memorial University of Newfoundland, St. John's, NL; Department of Laboratory Medicine (Yousef), St. Michael's Hospital, Toronto, Ont
| | - Nadia Ismiil
- Department of Laboratory Medicine and Pathobiology (Mirham, Ismiil, Sade, Streutker, MacMillan, Rasty, Hegele, Yousef), University of Toronto, Toronto, Ont.; Department of Pathology and Laboratory Medicine (Naugler), University of Calgary, Calgary, Alta.; Department of Pathology and Laboratory Medicine (Hayes), University of British Columbia, Vancouver, BC; Department of Pathology and Cellular Biology (Belisle), Université de Montréal, Montréal, Que.; Department of Pathology and Molecular Medicine (Popovic), McMaster University, Hamilton, Ont.; Department of Pathology (Joseph, Gabril), Western University, London, Ont.; Department of Pathology and Laboratory Medicine (Barnes), Dalhousie University, Halifax, NS; Department of Pathology (Carter), Memorial University of Newfoundland, St. John's, NL; Department of Laboratory Medicine (Yousef), St. Michael's Hospital, Toronto, Ont
| | - Annie Belisle
- Department of Laboratory Medicine and Pathobiology (Mirham, Ismiil, Sade, Streutker, MacMillan, Rasty, Hegele, Yousef), University of Toronto, Toronto, Ont.; Department of Pathology and Laboratory Medicine (Naugler), University of Calgary, Calgary, Alta.; Department of Pathology and Laboratory Medicine (Hayes), University of British Columbia, Vancouver, BC; Department of Pathology and Cellular Biology (Belisle), Université de Montréal, Montréal, Que.; Department of Pathology and Molecular Medicine (Popovic), McMaster University, Hamilton, Ont.; Department of Pathology (Joseph, Gabril), Western University, London, Ont.; Department of Pathology and Laboratory Medicine (Barnes), Dalhousie University, Halifax, NS; Department of Pathology (Carter), Memorial University of Newfoundland, St. John's, NL; Department of Laboratory Medicine (Yousef), St. Michael's Hospital, Toronto, Ont
| | - Shachar Sade
- Department of Laboratory Medicine and Pathobiology (Mirham, Ismiil, Sade, Streutker, MacMillan, Rasty, Hegele, Yousef), University of Toronto, Toronto, Ont.; Department of Pathology and Laboratory Medicine (Naugler), University of Calgary, Calgary, Alta.; Department of Pathology and Laboratory Medicine (Hayes), University of British Columbia, Vancouver, BC; Department of Pathology and Cellular Biology (Belisle), Université de Montréal, Montréal, Que.; Department of Pathology and Molecular Medicine (Popovic), McMaster University, Hamilton, Ont.; Department of Pathology (Joseph, Gabril), Western University, London, Ont.; Department of Pathology and Laboratory Medicine (Barnes), Dalhousie University, Halifax, NS; Department of Pathology (Carter), Memorial University of Newfoundland, St. John's, NL; Department of Laboratory Medicine (Yousef), St. Michael's Hospital, Toronto, Ont
| | - Catherine Streutker
- Department of Laboratory Medicine and Pathobiology (Mirham, Ismiil, Sade, Streutker, MacMillan, Rasty, Hegele, Yousef), University of Toronto, Toronto, Ont.; Department of Pathology and Laboratory Medicine (Naugler), University of Calgary, Calgary, Alta.; Department of Pathology and Laboratory Medicine (Hayes), University of British Columbia, Vancouver, BC; Department of Pathology and Cellular Biology (Belisle), Université de Montréal, Montréal, Que.; Department of Pathology and Molecular Medicine (Popovic), McMaster University, Hamilton, Ont.; Department of Pathology (Joseph, Gabril), Western University, London, Ont.; Department of Pathology and Laboratory Medicine (Barnes), Dalhousie University, Halifax, NS; Department of Pathology (Carter), Memorial University of Newfoundland, St. John's, NL; Department of Laboratory Medicine (Yousef), St. Michael's Hospital, Toronto, Ont
| | - Christina MacMillan
- Department of Laboratory Medicine and Pathobiology (Mirham, Ismiil, Sade, Streutker, MacMillan, Rasty, Hegele, Yousef), University of Toronto, Toronto, Ont.; Department of Pathology and Laboratory Medicine (Naugler), University of Calgary, Calgary, Alta.; Department of Pathology and Laboratory Medicine (Hayes), University of British Columbia, Vancouver, BC; Department of Pathology and Cellular Biology (Belisle), Université de Montréal, Montréal, Que.; Department of Pathology and Molecular Medicine (Popovic), McMaster University, Hamilton, Ont.; Department of Pathology (Joseph, Gabril), Western University, London, Ont.; Department of Pathology and Laboratory Medicine (Barnes), Dalhousie University, Halifax, NS; Department of Pathology (Carter), Memorial University of Newfoundland, St. John's, NL; Department of Laboratory Medicine (Yousef), St. Michael's Hospital, Toronto, Ont
| | - Golnar Rasty
- Department of Laboratory Medicine and Pathobiology (Mirham, Ismiil, Sade, Streutker, MacMillan, Rasty, Hegele, Yousef), University of Toronto, Toronto, Ont.; Department of Pathology and Laboratory Medicine (Naugler), University of Calgary, Calgary, Alta.; Department of Pathology and Laboratory Medicine (Hayes), University of British Columbia, Vancouver, BC; Department of Pathology and Cellular Biology (Belisle), Université de Montréal, Montréal, Que.; Department of Pathology and Molecular Medicine (Popovic), McMaster University, Hamilton, Ont.; Department of Pathology (Joseph, Gabril), Western University, London, Ont.; Department of Pathology and Laboratory Medicine (Barnes), Dalhousie University, Halifax, NS; Department of Pathology (Carter), Memorial University of Newfoundland, St. John's, NL; Department of Laboratory Medicine (Yousef), St. Michael's Hospital, Toronto, Ont
| | - Snezana Popovic
- Department of Laboratory Medicine and Pathobiology (Mirham, Ismiil, Sade, Streutker, MacMillan, Rasty, Hegele, Yousef), University of Toronto, Toronto, Ont.; Department of Pathology and Laboratory Medicine (Naugler), University of Calgary, Calgary, Alta.; Department of Pathology and Laboratory Medicine (Hayes), University of British Columbia, Vancouver, BC; Department of Pathology and Cellular Biology (Belisle), Université de Montréal, Montréal, Que.; Department of Pathology and Molecular Medicine (Popovic), McMaster University, Hamilton, Ont.; Department of Pathology (Joseph, Gabril), Western University, London, Ont.; Department of Pathology and Laboratory Medicine (Barnes), Dalhousie University, Halifax, NS; Department of Pathology (Carter), Memorial University of Newfoundland, St. John's, NL; Department of Laboratory Medicine (Yousef), St. Michael's Hospital, Toronto, Ont
| | - Mariamma Joseph
- Department of Laboratory Medicine and Pathobiology (Mirham, Ismiil, Sade, Streutker, MacMillan, Rasty, Hegele, Yousef), University of Toronto, Toronto, Ont.; Department of Pathology and Laboratory Medicine (Naugler), University of Calgary, Calgary, Alta.; Department of Pathology and Laboratory Medicine (Hayes), University of British Columbia, Vancouver, BC; Department of Pathology and Cellular Biology (Belisle), Université de Montréal, Montréal, Que.; Department of Pathology and Molecular Medicine (Popovic), McMaster University, Hamilton, Ont.; Department of Pathology (Joseph, Gabril), Western University, London, Ont.; Department of Pathology and Laboratory Medicine (Barnes), Dalhousie University, Halifax, NS; Department of Pathology (Carter), Memorial University of Newfoundland, St. John's, NL; Department of Laboratory Medicine (Yousef), St. Michael's Hospital, Toronto, Ont
| | - Manal Gabril
- Department of Laboratory Medicine and Pathobiology (Mirham, Ismiil, Sade, Streutker, MacMillan, Rasty, Hegele, Yousef), University of Toronto, Toronto, Ont.; Department of Pathology and Laboratory Medicine (Naugler), University of Calgary, Calgary, Alta.; Department of Pathology and Laboratory Medicine (Hayes), University of British Columbia, Vancouver, BC; Department of Pathology and Cellular Biology (Belisle), Université de Montréal, Montréal, Que.; Department of Pathology and Molecular Medicine (Popovic), McMaster University, Hamilton, Ont.; Department of Pathology (Joseph, Gabril), Western University, London, Ont.; Department of Pathology and Laboratory Medicine (Barnes), Dalhousie University, Halifax, NS; Department of Pathology (Carter), Memorial University of Newfoundland, St. John's, NL; Department of Laboratory Medicine (Yousef), St. Michael's Hospital, Toronto, Ont
| | - Penny Barnes
- Department of Laboratory Medicine and Pathobiology (Mirham, Ismiil, Sade, Streutker, MacMillan, Rasty, Hegele, Yousef), University of Toronto, Toronto, Ont.; Department of Pathology and Laboratory Medicine (Naugler), University of Calgary, Calgary, Alta.; Department of Pathology and Laboratory Medicine (Hayes), University of British Columbia, Vancouver, BC; Department of Pathology and Cellular Biology (Belisle), Université de Montréal, Montréal, Que.; Department of Pathology and Molecular Medicine (Popovic), McMaster University, Hamilton, Ont.; Department of Pathology (Joseph, Gabril), Western University, London, Ont.; Department of Pathology and Laboratory Medicine (Barnes), Dalhousie University, Halifax, NS; Department of Pathology (Carter), Memorial University of Newfoundland, St. John's, NL; Department of Laboratory Medicine (Yousef), St. Michael's Hospital, Toronto, Ont
| | - Richard G Hegele
- Department of Laboratory Medicine and Pathobiology (Mirham, Ismiil, Sade, Streutker, MacMillan, Rasty, Hegele, Yousef), University of Toronto, Toronto, Ont.; Department of Pathology and Laboratory Medicine (Naugler), University of Calgary, Calgary, Alta.; Department of Pathology and Laboratory Medicine (Hayes), University of British Columbia, Vancouver, BC; Department of Pathology and Cellular Biology (Belisle), Université de Montréal, Montréal, Que.; Department of Pathology and Molecular Medicine (Popovic), McMaster University, Hamilton, Ont.; Department of Pathology (Joseph, Gabril), Western University, London, Ont.; Department of Pathology and Laboratory Medicine (Barnes), Dalhousie University, Halifax, NS; Department of Pathology (Carter), Memorial University of Newfoundland, St. John's, NL; Department of Laboratory Medicine (Yousef), St. Michael's Hospital, Toronto, Ont
| | - Beverley Carter
- Department of Laboratory Medicine and Pathobiology (Mirham, Ismiil, Sade, Streutker, MacMillan, Rasty, Hegele, Yousef), University of Toronto, Toronto, Ont.; Department of Pathology and Laboratory Medicine (Naugler), University of Calgary, Calgary, Alta.; Department of Pathology and Laboratory Medicine (Hayes), University of British Columbia, Vancouver, BC; Department of Pathology and Cellular Biology (Belisle), Université de Montréal, Montréal, Que.; Department of Pathology and Molecular Medicine (Popovic), McMaster University, Hamilton, Ont.; Department of Pathology (Joseph, Gabril), Western University, London, Ont.; Department of Pathology and Laboratory Medicine (Barnes), Dalhousie University, Halifax, NS; Department of Pathology (Carter), Memorial University of Newfoundland, St. John's, NL; Department of Laboratory Medicine (Yousef), St. Michael's Hospital, Toronto, Ont
| | - George M Yousef
- Department of Laboratory Medicine and Pathobiology (Mirham, Ismiil, Sade, Streutker, MacMillan, Rasty, Hegele, Yousef), University of Toronto, Toronto, Ont.; Department of Pathology and Laboratory Medicine (Naugler), University of Calgary, Calgary, Alta.; Department of Pathology and Laboratory Medicine (Hayes), University of British Columbia, Vancouver, BC; Department of Pathology and Cellular Biology (Belisle), Université de Montréal, Montréal, Que.; Department of Pathology and Molecular Medicine (Popovic), McMaster University, Hamilton, Ont.; Department of Pathology (Joseph, Gabril), Western University, London, Ont.; Department of Pathology and Laboratory Medicine (Barnes), Dalhousie University, Halifax, NS; Department of Pathology (Carter), Memorial University of Newfoundland, St. John's, NL; Department of Laboratory Medicine (Yousef), St. Michael's Hospital, Toronto, Ont
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Kletke SN, Popovic S, Algird A, Alobaid A, Reddy KKV. Aneurysmal Bone Cyst of the Temporal Bone Presenting with Headache and Partial Facial Palsy. J Neurol Surg Rep 2015; 76:e18-22. [PMID: 26251800 PMCID: PMC4520979 DOI: 10.1055/s-0034-1390020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 02/23/2014] [Accepted: 07/07/2014] [Indexed: 10/25/2022] Open
Abstract
Background Aneurysmal bone cysts (ABCs) are benign bony lesions that rarely affect the skull base. Very few cases of temporal bone ABCs have been reported. We describe the first case of a temporal bone ABC that was thought to be consistent with a meningioma based on preoperative magnetic resonance imaging (MRI) findings. Clinical Presentation An otherwise healthy 23-year-old woman presented with a pulsatile noise in her left ear and a 4-week history of throbbing headache with nausea. There was no associated emesis, visual or auditory changes, or other neurologic features. Neurologic examination revealed a left lower motor neuron facial paresis. Computed tomography and MRI studies demonstrated a large lesion in the left middle cranial fossa skull base with erosion of the petrous temporal bone. Based on the presence of a "dural tail" on preoperative contrast-enhanced T1-weighted imaging, the lesion was interpreted to likely be consistent with a meningioma. An orbitozygomatic approach was utilized for surgical excision. Histopathologic evaluation was consistent with an ABC. Conclusion Postoperatively the patient had improvement in the lower motor neuron facial paresis. It is important to consider ABC in the differential diagnosis of intracranial lesions accompanied by the dural tail sign on MRI.
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Affiliation(s)
- Stephanie N Kletke
- Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Snezana Popovic
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Almunder Algird
- Division of Neurosurgery, McMaster University, Hamilton, Ontario, Canada
| | - Abdullah Alobaid
- Division of Neurosurgery, McMaster University, Hamilton, Ontario, Canada
| | - Kesava K V Reddy
- Division of Neurosurgery, McMaster University, Hamilton, Ontario, Canada
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Abstract
Extraskeletal para-articular osteochondromas of the infrapatellar fat pad are unique soft-tissue tumors whose etiology and clinical history remain poorly understood. We report three cases and a systematic review of the literature. Three females, aged 47, 54, and 70 years, presented with pain and a parapatellar knee mass. All three underwent marginal excision with no complications and no recurrence. In the literature, 32 reports describing 42 cases were identified. Mean age at presentation was 51.1 years (range: 12-75). There were 25 females and 20 males. Seven patients (15.6%) had a history of antecedent trauma. Mean duration of presenting symptoms was 63.9 months (range: 2-300). All patients except for one underwent open excision. Mean follow-up was 14.9 months (range: 3-96). There were no reports of recurrence or malignant transformation. Para-articular extraskeletal osteochondromas of the infrapatellar fat pad have a benign clinical history regardless of whether they are managed by arthroscopic or open marginal excision.
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Affiliation(s)
- Nathan Evaniew
- Department of Surgery, Center for Evidence-Based Orthopaedics, McMaster University, Hamilton, Ontario, Canada
| | - Darius Bayegan
- Department of Surgery, Center for Evidence-Based Orthopaedics, McMaster University, Hamilton, Ontario, Canada
| | - Snezana Popovic
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Naveen Parasu
- Department of Radiology, Juravinski Hospital, McMaster University, Hamilton, Ontario, Canada
| | - Michelle Ghert
- Department of Surgery, Juravinski Hospital, McMaster University, Hamilton, Ontario, Canada
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Gusenbauer K, Ruzhynsky V, Kak I, Adili AF, Giedraitis K, Popovic S, Kapoor A. Angiosarcoma of the adrenal gland with concurrent contralateral advanced renal cell carcinoma: A diagnostic and management dilemma. Can Urol Assoc J 2015; 9:E302-5. [PMID: 26029301 DOI: 10.5489/cuaj.2322] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Angiosarcoma is a rare high-grade malignant neoplasm with poor clinical outcome and survival rates, occurring most commonly in the skin and soft tissue. It is composed of neoplastic cells that demonstrate endothelial differentiation. The diagnosis of angiosarcoma can be difficult due to its pathohistologic presentation as a poorly differentiated neoplasm with associated secondary changes. We report a case of angiosarcoma of the adrenal gland with concurrent contralateral renal cell carcinoma (RCC) and renal vein thrombus. The presumptive clinical diagnosis was metastatic renal cell carcinoma to the contralateral adrenal gland. Pathohistologic evaluation demonstrated massive hematoma associated with intravascular papillary endothelial hyperplasia (IPEH)-like features. We discuss the pathohistological features used to ascertain a diagnosis of angiosarcoma in the presence of IPEH-like changes and differentiate it from reactive vascular proliferation seen in IPEH (Masson's tumour).
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Affiliation(s)
- Kaela Gusenbauer
- Division of Urology, Department of Surgery, McMaster University, Hamilton, ON
| | - Vladimir Ruzhynsky
- Division of Urology, Department of Surgery, McMaster University, Hamilton, ON
| | - Ipshita Kak
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON
| | - Anthony F Adili
- Division of Urology, Department of Surgery, McMaster University, Hamilton, ON
| | - Kyle Giedraitis
- Division of Urology, Department of Surgery, McMaster University, Hamilton, ON
| | - Snezana Popovic
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON
| | - Anil Kapoor
- Division of Urology, Department of Surgery, McMaster University, Hamilton, ON
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Kocovski L, Parasu N, Provias JP, Popovic S. Radiologic and Histopathologic Features of Calcifying Pseudoneoplasm of the Neural Axis. Can Assoc Radiol J 2015; 66:108-14. [DOI: 10.1016/j.carj.2014.07.004] [Citation(s) in RCA: 8] [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] [Received: 01/21/2014] [Accepted: 07/23/2014] [Indexed: 10/24/2022] Open
Abstract
Aim To describe the radiologic and corresponding histopathologic features of calcifying pseudoneoplasms of the neural axis. Methods Two cases of calcifying pseudoneoplasm of the neural axis were retrospectively reviewed. The first case was documented in a 64-year-old woman, who presented with lower back pain with radiation to her left leg. The second case was documented in a 70-year-old man, who presented with headaches. Medical records, radiologic and histologic findings, and related literature were reviewed. Results In the first case, imaging of the lumbar spine revealed a 3.8 × 2.2-cm calcified lesion at the level of vertebrae L5 and S1. A subsequent excision exposed an extradural lesion at L5. Histopathologic examination showed amorphous and granular calcifying material with occasional fibrohistiocytic and giant cell reaction, consistent with calcifying pseudoneoplasm of the neural axis. In the second case, imaging of the head revealed a 2.4 × 2.6-cm well-circumscribed, lobulated, calcified lesion within the basal frontal lobe. Subsequent resection exposed an intradural mass with a nodular arrangement of amorphous and granular calcifying material associated with fibrohistiocytic and giant cell reaction. Both patients had a favorable postoperative course and failed to show any clinical or radiologic sign of recurrence. Conclusion Calcifying pseudoneoplasm of the neural axis is an uncommon condition with an excellent prognosis but is often misdiagnosed due to its nonspecific clinical presentation and varied findings on radiology.
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Affiliation(s)
- Linda Kocovski
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Naveen Parasu
- Department of Radiology, McMaster University, Hamilton, Ontario, Canada
| | - John P. Provias
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Snezana Popovic
- Department of Pathology and Molecular Medicine, McMaster University, Hamilton, Ontario, Canada
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Mak IWY, Evaniew N, Popovic S, Tozer R, Ghert M. A Translational Study of the Neoplastic Cells of Giant Cell Tumor of Bone Following Neoadjuvant Denosumab. J Bone Joint Surg Am 2014; 96:e127. [PMID: 25100780 DOI: 10.2106/jbjs.m.01332] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [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] [Indexed: 02/01/2023]
Abstract
BACKGROUND Giant cell tumor of bone is a primary bone tumor that is treated surgically and is associated with high morbidity in many cases. This tumor consists of giant cells expressing RANK (receptor activator of nuclear factor-κB) and mesenchymal spindle-like stromal cells expressing RANKL (RANK ligand); the interaction of these cells leads to bone resorption. Denosumab is a monoclonal antibody that binds RANKL and directly inhibits osteoclastogenesis. Clinical studies have suggested clinical and histological improvement when denosumab was administered to patients with a giant cell tumor. However, no studies have yet examined the viability and functional characteristics of tumor cells following denosumab treatment. METHODS Specimens were obtained from six patients with a histologically confirmed giant cell tumor. Two of the patients had been treated with denosumab for six months. Primary cultures of stromal cells from fresh tumor tissue were established. Cell proliferation was measured over a two-day time course. The expression of RANKL and osteoprotegerin was analyzed with use of real-time PCR (polymerase chain reaction). RESULTS Histological specimens from both patients who had completed denosumab treatment showed the absence of giant cells but persistence of stromal cells. Cell proliferation studies indicated that proliferation of stromal cells cultured from clinical specimens following denosumab treatment was approximately 50% slower than that of specimens from untreated patients. The expression of RANKL in the specimens from the treated patients was almost completely eliminated. CONCLUSIONS Once the giant cell tumor tissue was no longer exposed to denosumab, the stromal cells continued to proliferate in vitro, albeit to a lesser degree. However, they also showed almost complete loss of RANKL expression. CLINICAL RELEVANCE It is clear that treatment with denosumab only partially addresses the therapeutic need of patients with a giant cell tumor by wiping out the osteoclasts but leaving the neoplastic stromal cells proliferative.
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Affiliation(s)
- Isabella W Y Mak
- Departments of Surgery (I.W.Y.M., N.E., and M.G.), Pathology and Molecular Science (S.P.), and Oncology (R.T.), McMaster University, 711 Concession Street, Hamilton, ON L8V 1C3, Canada. E-mail addresses for I.W.Y. Mak: ; . E-mail address for N. Evaniew: . E-mail address for S. Popovic: . E-mail address for R. Tozer: . E-mail address for M. Ghert:
| | - Nathan Evaniew
- Departments of Surgery (I.W.Y.M., N.E., and M.G.), Pathology and Molecular Science (S.P.), and Oncology (R.T.), McMaster University, 711 Concession Street, Hamilton, ON L8V 1C3, Canada. E-mail addresses for I.W.Y. Mak: ; . E-mail address for N. Evaniew: . E-mail address for S. Popovic: . E-mail address for R. Tozer: . E-mail address for M. Ghert:
| | - Snezana Popovic
- Departments of Surgery (I.W.Y.M., N.E., and M.G.), Pathology and Molecular Science (S.P.), and Oncology (R.T.), McMaster University, 711 Concession Street, Hamilton, ON L8V 1C3, Canada. E-mail addresses for I.W.Y. Mak: ; . E-mail address for N. Evaniew: . E-mail address for S. Popovic: . E-mail address for R. Tozer: . E-mail address for M. Ghert:
| | - Richard Tozer
- Departments of Surgery (I.W.Y.M., N.E., and M.G.), Pathology and Molecular Science (S.P.), and Oncology (R.T.), McMaster University, 711 Concession Street, Hamilton, ON L8V 1C3, Canada. E-mail addresses for I.W.Y. Mak: ; . E-mail address for N. Evaniew: . E-mail address for S. Popovic: . E-mail address for R. Tozer: . E-mail address for M. Ghert:
| | - Michelle Ghert
- Departments of Surgery (I.W.Y.M., N.E., and M.G.), Pathology and Molecular Science (S.P.), and Oncology (R.T.), McMaster University, 711 Concession Street, Hamilton, ON L8V 1C3, Canada. E-mail addresses for I.W.Y. Mak: ; . E-mail address for N. Evaniew: . E-mail address for S. Popovic: . E-mail address for R. Tozer: . E-mail address for M. Ghert:
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Power PF, Mak IWY, Singh S, Popovic S, Gladdy R, Ghert M. ETV5 as a regulator of matrix metalloproteinase 2 in human chondrosarcoma. J Orthop Res 2013; 31:493-501. [PMID: 22968857 DOI: 10.1002/jor.22227] [Citation(s) in RCA: 16] [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: 05/22/2012] [Accepted: 08/15/2012] [Indexed: 02/04/2023]
Abstract
Chondrosarcoma is a unique type of bone cancer in that it does not respond to chemotherapy or radiation therapy, and therefore many affected patients die from metastatic disease. Metastasis has been correlated with the upregulation of the matrix metalloproteinase (MMP) family of proteases, which can degrade extracellular components. ETV5 is a transcription factor which has shown to be overexpressed in various types of invasive tumors. We hypothesized that ETV5 regulates MMP2 in human chondrosarcoma with the protease acting as a downstream effector. Gene knock-down of ETV5 in human chondrosarcoma cells reduces MMP2 mRNA expression as well as decreased protein production and significantly decreased MMP2 activity. With plasmid transfected ETV5 upregulation, MMP2 expression is similarly upregulated at the gene expression and protein levels. Data from our bone resorption studies revealed that when a matrix metalloproteinase-2 inhibitor is added to the growth media of chondrosarcoma cells, collagen released from bone chips incubated with the cells decreased by 27%. This data suggests that ETV5 has a significant role in regulating MMP2 expression and therefore matrix resorption in human chondrosarcoma, and thus may be a targetable upstream effector of the metastatic cascade in this cancer.
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Affiliation(s)
- Patricia F Power
- Department of Health Science Graduate Studies, McMaster University, Hamilton, Ontario, Canada
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Mahabir VK, Ross C, Popovic S, Sur ML, Bourgeois J, Lim W, George JN, Wang G, Cook RJ, Toltl LJ, Nazi I, Kelton JG, Arnold DM. A blinded study of bone marrow examinations in patients with primary immune thrombocytopenia. Eur J Haematol 2012; 90:121-6. [PMID: 23140198 DOI: 10.1111/ejh.12041] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/06/2012] [Indexed: 11/27/2022]
Abstract
OBJECTIVE The role of bone marrow examinations in patients with primary immune thrombocytopenia (ITP) is uncertain. The objectives of this study were to determine the inter-rater reliability of bone marrow examinations and to identify distinguishing morphological features of ITP bone marrows under controlled conditions. METHODS Histological slides of bone marrow biopsy specimens and aspirates from 32 adult patients with severe primary ITP who had failed a median of two treatments, and 51 non-thrombocytopenic controls were retrieved from hospital archives. Slides were arranged in random order in a slide box and coded. Blinded to the diagnosis and platelet counts, three independent hematopathologists were asked to identify the ITP bone marrows and to evaluate megakaryocyte number, morphology, and distribution. RESULTS Overall chance-corrected agreement on ITP classification among the three raters was poor [kappa (κ) = 0.30; 95% confidence interval 0.22-0.38]. Raters were generally unable to correctly identify the ITP bone marrows from controls. Increased number of megakaryocytes, while an uncommon finding, was more frequent among ITP patients compared with controls (6/32, 18.8%; vs. 2/51, 3.9%; P = 0.05), and abnormal megakaryocyte morphology often led individual raters to reach a diagnosis of ITP. Overall sensitivity and specificity of bone marrow examinations were 24% and 90%, respectively. CONCLUSIONS This study confirms methodologically that bone marrow examinations are unreliable and frequently non-diagnostic in ITP. Thus, they are not useful for patients with typical disease. Rare subsets of patients with severe ITP demonstrated unique features such as increased number of megakaryocytes.
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Affiliation(s)
- Vishwanath K Mahabir
- Department of Medicine, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON, Canada
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Peric S, Rakocevic-Stojanovic V, Nisic T, Pavlovic S, Basta I, Popovic S, Damjanovic S, Lavrnic D. Cardiac autonomic control in patients with myasthenia gravis and thymoma. J Neurol Sci 2011; 307:30-3. [DOI: 10.1016/j.jns.2011.05.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Revised: 05/13/2011] [Accepted: 05/17/2011] [Indexed: 12/13/2022]
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Cao XL, Perez-Locas C, Dufresne G, Clement G, Popovic S, Beraldin F, Dabeka RW, Feeley M. Concentrations of bisphenol A in the composite food samples from the 2008 Canadian total diet study in Quebec City and dietary intake estimates. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2011; 28:791-8. [PMID: 21623504 PMCID: PMC3118530 DOI: 10.1080/19440049.2010.513015] [Citation(s) in RCA: 137] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2010] [Indexed: 10/28/2022]
Abstract
A total of 154 food composite samples from the 2008 total diet study in Quebec City were analysed for bisphenol A (BPA), and BPA was detected in less than half (36%, or 55 samples) of the samples tested. High concentrations of BPA were found mostly in the composite samples containing canned foods, with the highest BPA level being observed in canned fish (106 ng g(-1)), followed by canned corn (83.7 ng g(-1)), canned soups (22.2-44.4 ng g(-1)), canned baked beans (23.5 ng g(-1)), canned peas (16.8 ng g(-1)), canned evaporated milk (15.3 ng g(-1)), and canned luncheon meats (10.5 ng g(-1)). BPA levels in baby food composite samples were low, with 2.75 ng g(-1) in canned liquid infant formula, and 0.84-2.46 ng g(-1) in jarred baby foods. BPA was also detected in some foods that are not canned or in jars, such as yeast (8.52 ng g(-1)), baking powder (0.64 ng g(-1)), some cheeses (0.68-2.24 ng g(-1)), breads and some cereals (0.40-1.73 ng g(-1)), and fast foods (1.1-10.9 ng g(-1)). Dietary intakes of BPA were low for all age-sex groups, with 0.17-0.33 µg kg(-1) body weight day(-1) for infants, 0.082-0.23 µg kg(-1) body weight day(-1) for children aged from 1 to 19 years, and 0.052-0.081 µg kg(-1) body weight day(-1) for adults, well below the established regulatory limits. BPA intakes from 19 of the 55 samples account for more than 95% of the total dietary intakes, and most of the 19 samples were either canned or in jars. Intakes of BPA from non-canned foods are low.
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Affiliation(s)
- X-L Cao
- Food Research Division, Bureau of Chemical Safety, Food Directorate, Health Canada, 251 Sir Frederick Banting Driveway, Ottawa, Ontario, Canada.
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Stankov K, Bogdanovic G, Kojic V, Stankov S, Jojic N, Popovic L, Popovic S. Expression analysis of genes involved in epigenetic regulation and apoptosis in human malignant haematopoietic cell lines treated with 5-azacytidine. J BUON 2011; 16:116-122. [PMID: 21674861] [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: 05/30/2023]
Abstract
PURPOSE The aim of this study was to investigate the modulation of the expression status of 10 different genes involved in epigenetic regulation and apoptosis by the DNA methyltransferase (DNMT) inhibitor 5-azacytidine (5-Aza), as markers of response to treatment, in two different human malignant haematopoietic cell lines. METHODS In our analysis we used the SybrGreen technology and gene-specific primers for the qRT-PCR analysis of 10 genes, in cDNA of PC-MDS and K562 cell lines, treated by 1 micromole of 5-Aza for 24h. RESULTS DNMT1 and DNMT3A showed statistically significant decrease of expression in 5-Aza-treated PC-MDS cells, whereas DNMT3B showed significantly decreased expression in 5-Aza-treated K562 cells. The members of the Bcl- 2 family of apoptosis-regulating genes Bcl-2 and Bax showed statistically significant differences in expression, in comparison with non-treated PC-MDS cells. Our most interesting result was the significant upregulation (re-expression) of p15, in 5-Aza-treated PC-MDS cells. CONCLUSION The re-expression of p15 in PC-MDS cell line evaluated by qRT-PCR makes this novel cell line a suitable model for the studies of pharmacologic demethylation as a plausible mechanism resulting in hematologic response in myelodysplastic syndrome (MDS).
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Affiliation(s)
- K Stankov
- Department of Biochemistry, Medical Faculty, Clinical Center of Vojvodina, University of Novi Sad, Novi Sad, Serbia.
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Baskic D, Ilic N, Popovic S, Djurdjevic P, Ristic P, Avramovic D, Arsenijevic N. In vitro induction of apoptotic cell death in chronic lymphocytic leukemia by two natural products: preliminary study. J BUON 2010; 15:732-739. [PMID: 21229638] [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: 05/30/2023]
Abstract
PURPOSE B cell chronic lymphocytic leukemia (B-CLL) is an neoplastic disorder characterized by alterations in the pathways of programmed cell death (apoptosis). Deregulation of apoptosis pathways also contributes to chemoresistance of B-CLL cells. Therefore, it is not surprising that induction and acceleration of apoptosis represent key point in novel B-CLL therapeutic protocols. The present study was designed to investigate the effects of two natural products, Immunarc forte and Korbazol on the in vitro survival of leukemic cells. METHODS peripheral blood mononuclear cells (PBMC) from 20 B-CLL patients and 20 healthy donors were used for cytotoxicity studies. Cytotoxic activity of the tested products were assessed by the MTT colorimetric assay and the type of cell death was determined by flow cytometry. RESULTS we found that Korbazol was selectively cytotoxic against B-CLL cells, but the cytotoxic activity of Immunarc forte was much weaker. Of note, synergy was shown between these two drugs, and this effect was also selective, without affecting the normal mononuclear cells. According to Annexin-V binding, Korbazol and Immunarc forte induced apoptotic type of cell death in B-CLL cells. Moreover, treatment with Korbazol, but not with Immunarc forte, decreased spontaneous apoptosis in cultured normal polymorphonuclear cells. CONCLUSION our findings imply that Korbazol is as potential therapeutic agent that induces apoptosis of B-CLL cells. The resistance of normal mononuclear cells and anti-apoptotic effects on normal polymorphonuclear cells, as well as its ability to synergize with Immunarc forte, warrants further investigation and supports their therapeutic application in the treatment of B-CLL.
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MESH Headings
- Annexin A5/metabolism
- Apoptosis/drug effects
- Biological Products/pharmacology
- Cells, Cultured
- Flow Cytometry
- Humans
- In Vitro Techniques
- Leukemia, Lymphocytic, Chronic, B-Cell/blood
- Leukemia, Lymphocytic, Chronic, B-Cell/drug therapy
- Leukemia, Lymphocytic, Chronic, B-Cell/pathology
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Affiliation(s)
- D Baskic
- Department of Microbiology and Immunology, Faculty of Medicine, University of Kragujevac, Kragujevac, Serbia.
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Popovic S, Baskic D, Djurdjevic P, Zelen I, Mitrovic M, Nikolic I, Avramovic D, Radenkovic M, Arsenijevic N. Endoplasmic reticulum stress associated with caspases-4 and -2 mediates korbazol-induced B-chronic lymphocytic leukemia cell apoptosis. J BUON 2010; 15:783-790. [PMID: 21229646] [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: 05/30/2023]
Abstract
PURPOSE B-cell chronic lymphocytic leukemia (B-CLL) is an incurable disease that rapidly develops drug resistance. Therefore there is a need for identifying new agents that will improve the therapeutic outcome. Korbazol is a natural product known to exert cytotoxic effect on the in vitro survival of leukemic cells. The aim of this study was to investigate the mechanism of korbazol-induced apoptosis in B-CLL leukemic cells. METHODS peripheral blood mononuclear cells from 10 B-CLL patients were used for assessing the effect of caspase inhibitors and chelator of intracellular Ca(2)+. RESULTS cell death rate induced by the tested compound was decreased with the caspase-3 inhibitor Ac-DEVD-CHO, and the inhibitors of caspase-2 (Z-VDVAD-FMK) and -4 (ZYVAD- FMK), but not with the caspase-9 inhibitor z-LEHD-FMK and caspase-8 inhibitor z-IETD-FMK. No significant release of cytochrome C (cyt C) from mitochondria to the cytosol of B-CLL cells treated with korbazol was observed. Moreover, chelating of intracellular Ca(2)+ with BAPTA-AM almost completely abolished the cytotoxic effect of korbazol. CONCLUSION engagement of caspases-2 and -4 and mobilization of intracellular Ca(2)+ indicate involvement of endoplasmic reticulum (ER) stress in apoptosis induced by korbazol.
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MESH Headings
- Apoptosis/drug effects
- Biological Products/pharmacology
- Calcium/metabolism
- Caspase 2/metabolism
- Caspases, Initiator/metabolism
- Cytochromes c/metabolism
- Endoplasmic Reticulum/drug effects
- Enzyme Inhibitors/pharmacology
- Humans
- Leukemia, Lymphocytic, Chronic, B-Cell/drug therapy
- Leukemia, Lymphocytic, Chronic, B-Cell/enzymology
- Leukemia, Lymphocytic, Chronic, B-Cell/pathology
- Mitochondria/drug effects
- Oxidative Stress/drug effects
- Plant Extracts/pharmacology
- Tumor Cells, Cultured
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Affiliation(s)
- S Popovic
- Department of Microbiology and Immunology, Faculty of Medicine, University of Kragujevac, Kragujevac, Serbia.
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Mak IWY, Seidlitz EP, Cowan RW, Turcotte RE, Popovic S, Wu WCH, Singh G, Ghert M. Evidence for the role of matrix metalloproteinase-13 in bone resorption by giant cell tumor of bone. Hum Pathol 2010; 41:1320-9. [PMID: 20573369 DOI: 10.1016/j.humpath.2010.03.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [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: 02/02/2010] [Revised: 03/11/2010] [Accepted: 03/17/2010] [Indexed: 10/19/2022]
Abstract
Giant cell tumor of bone (GCT) is an aggressively osteolytic primary bone tumor that is characterized by the presence of abundant multinucleated osteoclast-like giant cells, hematopoietic monocytes, and a distinct mesenchymal stromal cell component. Previous work in our laboratory has shown that matrix metalloproteinase (MMP)-13 is the principal proteinase expressed by the stromal cells of GCT. The release of cytokines, particularly interleukin-1beta, by the giant cells of GCT acts on stromal cells to stimulate a surge in MMP-13 secretion. The purpose of this study was to determine the bone resorption capabilities of the cellular elements of GCT and the significance of the MMP-13 expression involved in GCT bone resorption. We present a 3-dimensional histomorphometric technique developed to analyze resorption pit depth and yield an accurate measurement of bone resorption with a direct physical view of lacunae on bone slices. In this study, we demonstrate that the mesenchymal stromal cells and the multinucleated giant cells of GCT are independently capable of bone resorption. However, coculture of these 2 cell fractions shows a synergistic increase in bone resorption. In addition, inhibition of MMP-13 reduces resorptive activity of the cells indicating that MMP-13 likely plays an important role in this tumor. This cell-cell cooperation involves giant cell-derived cytokine up-regulation of MMP-13 in the stromal cells, which in turn assists the giant cells in bone resorption. Future research will involve elucidation of the role of cell-cell/matrix communication pathways in bone resorption and tumorigenesis in GCT.
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Zelen I, Djurdjevic P, Popovic S, Stojanovic M, Jakovljevic V, Radivojevic S, Baskic D, Arsenijevic N. Antioxidant enzymes activities and plasma levels of oxidative stress markers in B-chronic lymphocytic leukemia patients. J BUON 2010; 15:330-336. [PMID: 20658731] [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: 05/29/2023]
Abstract
PURPOSE Overproduction of reactive oxygen species (ROS) intermediates above the functional capability of cellular antioxidants may result in instability of important macromolecules and represents the molecular basis of many diseases including inflammation processes, cardiovascular alterations, cancer etc. The purpose of this study was to determine plasma level of superoxide anion, hydrogen-peroxide and malondialdehyde (MDA) as markers of oxidative stress and activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPx) as antioxidant enzymes in B-chronic lymphocytic leukemia (B-CLL) patients. METHODS The study included 29 untreated B-CLL patients in stage A, and 21 in stages B and C, classified according to the Binet system; 31 healthy volunteers formed the control group. After centrifugation of heparinized peripheral blood, plasma levels of all investigated parameters were determined using spectrophotometric methods. RESULTS Plasma CAT activity was increased in B-CLL patients compared with control subjects; also, progression of disease was related with significantly higher plasma activity of CAT. Also, B-CLL patients showed significantly higher plasma concentration of MDA compared with controls. No statistically significant differences of superoxide anion and hydrogen peroxide as well as plasma activity of SOD and GPx between the tested groups were noted. CONCLUSION Increase of CAT activity in B-CLL patients indicates that there is stimulation of the antioxidant enzyme system, while the increase of MDA concentration shows increased lipid peroxidation level. According to these results it could be concluded that an imbalance exists between oxidants and antioxidants in the plasma of B-CLL patients.
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Affiliation(s)
- I Zelen
- Department of Biochemistry, Faculty of Medicine, University of Kragujevac, S. Markovica 69, 34 000 Kragujevac, Serbia.
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Stankov K, Mihajlovic D, Stanimirov B, Stankov S, Bajin-Katic K, Mikov I, Popovic S. Quantitative real time-polymerase chain reaction method in Bcr-Abl translocation diagnostics. J BUON 2010; 15:318-322. [PMID: 20658729] [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: 05/29/2023]
Abstract
PURPOSE The quantitative real-time polymerase chain reaction (qRT-PCR) is used in the detection of molecular events involved in leukemogenesis, such as the Bcr-Abl gene translocation, the most important factor in the pathogenesis of chronic myeloid leukaemia (CML). The main aim of our study was to test the reproducibility, specificity and sensitivity of the qRT-PCR in the detection of Bcr-Abl gene translocation. METHODS In complementary (c)DNA, isolated from K562 Bcr-Abl positive cell line, we performed qRT-PCR analysis with Bcr-Abl specific primers. For qRT-PCR analysis, we used serial dilutions of the newly synthesized cDNA in order to establish the detection threshold of this method. RESULTS Using the specific primers for the Bcr-Abl translocation, we obtained the specific translocation product in cDNA sample of K562 human erythroid leukemia cell line. qRT- PCR showed significant sensitivity with the detection threshold for the Bcr-Abl fluorescent signal, which enabled the precise detection that was accurate within a 10-fold dilution range, and a dynamic range of 5 orders of magnitude. CONCLUSION The results of our study showed that the application of the qRT-PCR is the optimal method for the detection of Bcr-Abl gene translocation, characterized by high reproducibility, specificity and sensitivity.
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MESH Headings
- Adenine
- Amino Acid Sequence
- Base Sequence
- Chromosomes, Human, Pair 22
- Chromosomes, Human, Pair 9
- DNA Primers
- DNA, Complementary/genetics
- Exons/genetics
- Fusion Proteins, bcr-abl/genetics
- Humans
- K562 Cells
- Leukemia, Erythroblastic, Acute/genetics
- Mutagenesis, Insertional
- Reverse Transcriptase Polymerase Chain Reaction
- Translocation, Genetic
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Affiliation(s)
- K Stankov
- Department of Biochemistry, Medical Faculty Novi Sad, University of Novi Sad, Novi Sad, Serbia.
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Rakocevic Stojanovic V, Peric S, Lavrnic D, Popovic S, Ille T, Stevic Z, Basta I, Apostolski S. Leptin and the metabolic syndrome in patients with myotonic dystrophy type 1. Acta Neurol Scand 2010; 121:94-8. [PMID: 19804472 DOI: 10.1111/j.1600-0404.2009.01237.x] [Citation(s) in RCA: 14] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
OBJECTIVES To evaluate serum leptin concentration and its relation to metabolic syndrome (MSy) in non-diabetic patients with myotonic dystrophy type 1 (DM1). MATERIALS AND METHODS This study included 34 DM1 patients, and the same number of healthy subjects matched for age, sex and body mass index (BMI). RESULTS DM1 patients had increased BMI and insulin resistance, and increased leptin and insulin concentrations, but the other features of MSy such as diabetes, glucose intolerance and hypertension were not detected in DM1 patients. Serum leptin levels were higher in patients with DM1 than in healthy controls (8.5 +/- 6.6 ng/ml vs 3.6 +/- 2.9 ng/ml in men, and 13.9 +/- 10.0 ng/ml vs 10.9 +/- 6.9 ng/ml in women, respectively). In DM1 patients, leptin levels correlated with BMI, fasting insulin and insulin resistance (HOMA) (P < 0.01). CONCLUSIONS The leptin overproduction correlated with insulin resistance in DM1 patients but the significance of this finding remains unclear.
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Kacarevic-Popovic Z, Dragasevic M, Krkljes A, Popovic S, Jovanovic Z, Tomic S, Miskovic-Stankovic V. On the Use of Radiation Technology for Nanoscale Engineering of Silver/Hydrogel Based Nanocomposites for Potential Biomedical Application. ACTA ACUST UNITED AC 2010. [DOI: 10.2174/22102892010010100200] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Trinkaus M, Ooi WS, Amir E, Popovic S, Kalina M, Kahn H, Singh G, Gainford MC, Clemons M. Examination of the mechanisms of osteolysis in patients with metastatic breast cancer. Oncol Rep 2009; 21:1153-9. [PMID: 19360288 DOI: 10.3892/or_00000335] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
The benefits of bisphosphonates (BPs) in reducing skeletal-related events (SREs) in patients with bone metastases has mainly been attributed to their potent osteoclast inhibiting effect. However, despite the use of modern systemic anticancer therapy including potent BPs, many patients with bone metastases continue to have SREs. An improved understanding of the fundamental mechanisms of bone destruction allows for further development of appropriate targeted treatments. In this study, archival paraffin-embedded bone metastases specimens from patients with metastatic breast cancer were examined for the presence of osteoclasts, expression of the receptor activator of nuclear factor kappaB (RANK), RANK Ligand (RANKL), osteoprotegerin (OPG) and vascular endothelial growth factor (VEGF). Histological specimens were available for primary breast cancer, lymph node metastases, normal breast and normal bone tissues for comparison. Bone metastasis specimens were available for 20 BP naïve patients and two BP-treated patients. Osteoclasts were significantly increased in the bone metastases of the BP naïve group compared to normal bone. No osteoclasts were detected in the BP-treated group. RANKL was predominantly expressed in osteoblasts and in the stromal elements of metastatic tissue. Conversely, RANK was present in osteoclasts of bone metastases and normal bone, as well as in tumor cells of metastatic lymph nodes and bone metastases. VEGF was strongly expressed in the control bone and bone metastases regardless of BP treatment. In summary, osteoclasts may not be the singular obligatory factor for osteolysis in bone metastases. An increased expression of RANKL in stromal tissue surrounding bone metastases, RANK in osteoclasts and VEGF may serve as future targeted therapies possibly in conjunction with bisphosphonates. The mechanisms for osteoclast expression and the expression of RANKL, RANK, OPG and VEGF merit further prospective analysis, particularly in the context of BP treatment and progressive bone metastases.
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Mak IWY, Cowan RW, Popovic S, Colterjohn N, Singh G, Ghert M. Upregulation of MMP-13 via Runx2 in the stromal cell of Giant Cell Tumor of bone. Bone 2009; 45:377-86. [PMID: 19422937 DOI: 10.1016/j.bone.2009.04.253] [Citation(s) in RCA: 34] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/11/2009] [Revised: 04/09/2009] [Accepted: 04/27/2009] [Indexed: 01/24/2023]
Abstract
Giant Cell Tumor of bone (GCT) is an aggressively osteolytic and cytokine-rich bone tumor. Previous work in our lab has shown that matrix metalloproteinase-13 (MMP-13) is the principal proteinase expressed by the mesenchymal stromal cells of GCT. The Runx2 transcription factor is known to have a binding site in the MMP-13 promoter region, and we have previously found this transcription factor to be constitutively expressed in GCT stromal cells. The purpose of this study was to determine the role of Runx2 in MMP-13 regulation in GCT stromal cells. Following in vitro stimulation of GCT stromal cells with incremental concentrations of cytokine IL-1beta or TNF-alpha, the level of MMP-13 mRNA expression increased dramatically over 100-fold with a concomitant increase in MMP-13 protein expression. Inhibition of the ERK and JNK signaling pathways inhibited the upregulation of MMP-13 in these cells. Runx2 siRNA knockdown resulted in MMP-13 knockdown, and this effect was amplified following cytokine stimulation. Our study provides the first evidence that Runx2 may play a crucial role in cytokine-mediated MMP-13 expression in GCT stromal cells.
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Affiliation(s)
- Isabella W Y Mak
- Department of Surgery, McMaster University, Hamilton, Ontario, Canada.
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Djurdjevic P, Zelen I, Ristic P, Jovanovic I, Jakovljevic V, Baskic D, Popovic S, Arsenijevic N. Oxidative stress accelerates spontaneous apoptosis of B-chronic lymphocytic leukemia lymphocytes. J BUON 2009; 14:281-287. [PMID: 19650179] [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
PURPOSE B-chronic lymphocytic leukemia (B-CLL) is characterized by the progressive accumulation of small immature B lymphocytes which do not undergo apoptosis due to an underlying defect. One potential mechanism of defective apoptosis could be irregular oxidative stress. The goal of our investigation was to determine in vitro production of oxidative stress markers by lymphocytes of B-CLL patients. PATIENTS AND METHODS 30 untreated stage A B-CLL patients, as well as 20 stage B and C patients and 30 healthy volunteers as a control group were examined. Nitric oxide (NO), superoxide anion, hydrogen peroxide and malondialdehyde (MDA) were measured by spectrophotometry in supernatants of lymphocytes cultures of all 3 investigational groups. The method applied for detecting apoptosis was fluorescence microscopic analysis using acridine orange/ethidium bromide (AO/EB) double staining. RESULTS In vitro lymphocyte production of superoxide anion, hydrogen peroxide and MDA was increased in B-CLL patients, while there were no statistical significantly differences of NO production among the tested groups. Compared with the spontaneous apoptosis observed in control subjects lymphocytes, B-CLL lymphocytes showed increased percentages of apoptotic cells after incubation for 24 h. Disease progression was not followed with significant differences in spontaneous apoptosis of B-CLL lymphocytes. CONCLUSION This intensive oxidative stress markers production in cultures of B-CLL lymphocytes could be one of the potential mechanisms in the pathogenesis of abnormal apoptosis.
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Affiliation(s)
- P Djurdjevic
- Department of Pathophysiology, Faculty of Medicine, University of Kragujevac, Kragujevac, Serbia.
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Rajic N, Savic A, Popovic S, Urosevic I, Savic I. Successful control of bleeding during supracondylar amputation caused by severe compartment syndrome in patient with haemophilia A and high titre of inhibitor. Haemophilia 2009; 15:601-2. [PMID: 19175420 DOI: 10.1111/j.1365-2516.2008.01943.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Tchirikov M, Strohner M, Popovic S, Hecher K, Schröder HJ. Cardiac output following fetoscopic coagulation of major placental vessels in fetal sheep. Ultrasound Obstet Gynecol 2008; 32:917-922. [PMID: 18677701 DOI: 10.1002/uog.5364] [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] [Indexed: 05/26/2023]
Abstract
OBJECTIVES To measure changes in cardiac output (CO) after partial cord occlusion in fetal sheep in order to investigate pathophysiological fetal adaptation mechanisms in a simulated acute placental insufficiency model under standardized conditions, with the aim of finding relevant methods for monitoring human fetuses during stress situations. METHODS We used minimally invasive, percutaneous endoscopic techniques to close umbilical vessels in mid-gestational fetal sheep. Placental blood flow was reduced by preferentially closing first arterial and then the concomitant venous umbilical vessels within a short time interval. The investigations were carried out on 11 pregnant ewes at a median gestational age of 86 (range, 73-95) days. Major placental arteries and veins were occluded permanently by coagulation with bipolar forceps under percutaneous fetoscopic control. The fetal CO and Doppler parameters in the ductus venosus (DV), umbilical artery (UA) and umbilical vein (UV) were measured. RESULTS In spite of heart rate reduction, the CO was not significantly affected by vessel occlusion (mean +/- SD, 500 +/- 194 mL/min before and 457 +/- 219 mL/min after coagulation) because stroke volume slightly increased from 2.65 +/- 1.16 mL/beat to 3.1 +/- 1.5 mL/beat. The right to left CO ratio remained at 1.4. The UV flow/combined CO ratio decreased from 34 +/- 14% to 25 +/- 10% after vessel coagulation. The pulsatility index in the DV increased from 0.4 +/- 0.1 to 0.7 +/- 0.4. The DV blood flow volume remained relatively constant after the intervention. The DV shunting rate, given as DV/UV flow ratio, increased significantly from 30.8 +/- 4.7% to 59.3 +/- 25.0%. CONCLUSIONS The nearly simultaneous closure of arterial and venous umbilical vessels changed the flow pattern in the UA and significantly reduced placental blood perfusion. It did not distinctly change the blood flow volume rate through the DV, and consequently the DV shunting rate was increased. The combined CO was not significantly affected by the vascular obstruction, whereas the fraction of combined CO directed to the placenta was reduced.
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Affiliation(s)
- M Tchirikov
- Department of Obstetrics and Fetal Medicine, Johannes Gutenberg Universität Mainz, University Medical Center Mainz, Mainz, Germany.
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Stankov K, Tauszig-Delamasure S, Bogdanovic G, Popovic L, Stankov S, Sylvius N, Popovic S, Mehlen P. 277 POSTER Expression of the genes involved in apoptosis, proliferation and endoplasmic reticulum stress in ionomycin/PMA treated Jurkat cells. EJC Suppl 2008. [DOI: 10.1016/s1359-6349(08)72211-0] [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] Open
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Ooi WS, Popovic S, Kalina M, Harriette K, Singh G, Gainford MC, Clemons M. Mechanisms of bone metastasis (BM) growth in patients with metastatic breast cancer (MBC): An exploratory study. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.1102] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
1102 Background: The benefits of bisphosphonates (BPs) in reducing or delaying skeletal related events (SREs) in patients with BM have been attributed to their potent osteoclast (OC) inhibiting effect. However, despite the use of modern systemic anti-cancer therapy including potent BPs, many patients with BM continue to suffer from the consequences of their bone disease. An improved understanding of the basic mechanisms of bone destruction would allow further appropriate targeted treatment strategies to be developed. Methods: Archival paraffin embedded BM specimens from patients with MBC were examined for expression of OCs, receptor activator of nuclear factor kappa B (RANK), RANK Ligand (RANKL) and Osteoprotegerin (OPG). Histological specimens were also available for primary breast cancer, lymph node (LN) metastasis, normal breast and bone tissues for comparison. Results: BM specimens were available for 20 BP naïve pts and 2 pts treated with BP. OCs were significantly increased in the BM of the BP naive group compared to controls. There were no OCs seen in the BP treated group. RANK was expressed on tumor cells (TCs) in the both bone and nodal metastases but not on the primary cancer cells. It is also expressed on the OCs which were present in both BM and normal bone. While RANKL was absent in TCs, it was strongly expressed in all stromal cells (SCs) in all specimens and in osteoblasts. The OPG, while present in TCs of the BM and LN metastases, is not detected in the primary cancer. Conclusion: The mechanism of bone destruction in MBC are not fully understood and are clearly multifactorial. OCs may not be the singular obligatory factor for osteolysis in BM. Further investigation of various inhibitors of the RANK/RANKL/OPG pathways, may allow novel treatment strategies to be developed. No significant financial relationships to disclose.
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Affiliation(s)
- W. S. Ooi
- Toronto Sunnybrook Regional Cancer Centre, Toronto, ON, Canada; McMaster University, Hamilton, ON, Canada; Juravinski Cancer Centre, Hamilton, ON, Canada; University of Sydney, Sydney, Australia; Princess Margaret Hospital, Toronto, ON, Canada
| | - S. Popovic
- Toronto Sunnybrook Regional Cancer Centre, Toronto, ON, Canada; McMaster University, Hamilton, ON, Canada; Juravinski Cancer Centre, Hamilton, ON, Canada; University of Sydney, Sydney, Australia; Princess Margaret Hospital, Toronto, ON, Canada
| | - M. Kalina
- Toronto Sunnybrook Regional Cancer Centre, Toronto, ON, Canada; McMaster University, Hamilton, ON, Canada; Juravinski Cancer Centre, Hamilton, ON, Canada; University of Sydney, Sydney, Australia; Princess Margaret Hospital, Toronto, ON, Canada
| | - K. Harriette
- Toronto Sunnybrook Regional Cancer Centre, Toronto, ON, Canada; McMaster University, Hamilton, ON, Canada; Juravinski Cancer Centre, Hamilton, ON, Canada; University of Sydney, Sydney, Australia; Princess Margaret Hospital, Toronto, ON, Canada
| | - G. Singh
- Toronto Sunnybrook Regional Cancer Centre, Toronto, ON, Canada; McMaster University, Hamilton, ON, Canada; Juravinski Cancer Centre, Hamilton, ON, Canada; University of Sydney, Sydney, Australia; Princess Margaret Hospital, Toronto, ON, Canada
| | - M. C. Gainford
- Toronto Sunnybrook Regional Cancer Centre, Toronto, ON, Canada; McMaster University, Hamilton, ON, Canada; Juravinski Cancer Centre, Hamilton, ON, Canada; University of Sydney, Sydney, Australia; Princess Margaret Hospital, Toronto, ON, Canada
| | - M. Clemons
- Toronto Sunnybrook Regional Cancer Centre, Toronto, ON, Canada; McMaster University, Hamilton, ON, Canada; Juravinski Cancer Centre, Hamilton, ON, Canada; University of Sydney, Sydney, Australia; Princess Margaret Hospital, Toronto, ON, Canada
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Dimitrijevic-Sreckovic V, Djordjevic P, Colak E, Sreckovic B, Gostiljac D, Popovic S, Canovic F, Ilic M, Nikolic D, Stojanovic J, Milic G, Nisic T, Pejcic G, Milosevic K. PO19-578 INCREASED VALUES OF C-REACTIVE PROTEIN IN CHILDREN AND ADOLESCENTS WITH METABOLIC SYNDROME. ATHEROSCLEROSIS SUPP 2007. [DOI: 10.1016/s1567-5688(07)71588-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: 11/16/2022]
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Zelen I, Djurdjevic P, Ristic P, Jovanovic I, Jakovljevic V, Baskic D, Popovic S, Arsenijevic N. C38. Plasma levels of oxidative stress markers in patients with B–chronic lymphocytic leukemia. Nitric Oxide 2007. [DOI: 10.1016/j.niox.2007.09.083] [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: 11/30/2022]
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Djurdjevic P, Zelen I, Ristic P, Jovanovic I, Jakovljevic V, Baskic D, Popovic S, Arsenijevic N. C5. Production of NO, superoxide anion, H2O2 and MDA in vitro by B lymphocytes of B-chronic lymphocytic leukemia patients. Nitric Oxide 2007. [DOI: 10.1016/j.niox.2007.09.050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Popovic S, Arsenijevic N, Baskic D. In vitroassay for the quantitative measurement of apoptotic lymphocytes phagocytosis by peripheral blood monocytes. ACTA ACUST UNITED AC 2006; 93:325-33. [PMID: 17191664 DOI: 10.1556/aphysiol.93.2006.4.8] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Currently used assays for the quantification of apoptotic cells uptake by phagocytes have several methodological problems. Our assay overcomes some of these problems. As a source of apoptotic cells we used peripheral blood lymphocytes obtained from the patients with chronic lymphoblast leukaemia. Apoptosis was induced by incubating cells with cycloheximide for up to 24 h. The assay was performed in suspension of peripheral blood mononuclear cells. For the visualisation of the phagocytes and phagocyted cells and discrimination of phagocyted from bound apoptotic cells we used Acridine orange/Ethidium bromide double staining. Here we offer a simple test which enables reliable measurement and it can show the difference of phagocytic potential between different individuals.
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Affiliation(s)
- S Popovic
- Institute of Microbiology and Immunology, Faculty of Medicine, University of Kragujevac, Svetozara Markovica 69, 34000 Kragujevac, Serbia.
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Djordjevic PB, Lalic N, Bumbasirevic V, Jotic A, Paunovic I, Colovic R, Lalic K, Raketic N, Nikolic D, Zamaklar M, Rajkovic N, Lukic LJ, Dimitrijevic-Sreckovic V, Dragasevic M, Popovic S, Gostiljac D, Canovic F, Markovic I. Human fetal islet transplantation in type 1 diabetics: comparison of immunological effects between multiple implantation regimens. Transplant Proc 2006; 37:4440-5. [PMID: 16387141 DOI: 10.1016/j.transproceed.2005.10.050] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2004] [Indexed: 11/28/2022]
Abstract
Previous studies have suggested that the multiple transplants might be equally metabolically efficient to a single regimen for human adult islets. The aim of this study was to compare immunological and metabolic parameters after each of the two regimens of human fetal islets (HFI). Group A single transplants (n = 9) had 180 +/- 20 x 1000 HFI equivalents (IEQs) implanted via a single intramuscular injection. In group B multiple transplants (n = 8) islets were implanted by three consecutive injections of 60 +/- 10 x 1000 IEQs at 7-day intervals. We analyzed the immunological parameters of CD4/CD8 T lymphocyte ratios; islet cell antibodies (ICAs) and insulin antibodies (IAs). We estimated insulin secreting capacity (ISC) as the metabolic parameter. We observed that the CD4+/CD8+ T-cell ratio increased, peaking on day 90, in similar fashion in both groups: day -1: A = 1.18 +/- 0.03 versus B = 1.19 +/- 0.04; on day 90: A = 1.79 +/- 0.09, versus B = 1.75 +/- 0.08 (P = NS) immediately before the decrease in C-peptide levels. Thereafter the ratios rapidly decreased without statistical differences. The levels of ICAs did not change. The levels of IAs, which were increased before transplant, then decreased without statistical differences between the groups. The values of ISC increased after transplant and then decreased similar to the T-cell ratio. Our results demonstrated that regimens of multiple and single HFIs did not show differences in the kinetics of the immunological response presumably mediating graft destruction. The CD4/CD8 ratio increased as the C-peptide level decreased, peaking on day 90 at the time of a decrease in C-peptide. These results may be useful for clinical studies of HFIs for type 1 diabetic patients.
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Affiliation(s)
- P B Djordjevic
- Institut for Endocrinology, Diabetes, and Metabolic Diseases, Belgrade, Serbia and Montenegro.
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Popovic S, Skoko Z. Temperature dependence of microstructure of quenched and aged Al–Zn alloys. Acta Crystallogr A 2004. [DOI: 10.1107/s0108767304094991] [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: 11/10/2022] Open
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Popovic S, Skoko Z. Phase transitions in Al-44at.%Zn and Al-48at.%Zn alloys. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302099476] [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: 11/10/2022] Open
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