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Takada M, Smyth LA, Thaiwong T, Richter M, Corner SM, Schall PZ, Kiupel M, Yuzbasiyan-Gurkan V. Activating Mutations in PTPN11 and KRAS in Canine Histiocytic Sarcomas. Genes (Basel) 2019; 10:genes10070505. [PMID: 31277422 PMCID: PMC6678586 DOI: 10.3390/genes10070505] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 06/25/2019] [Accepted: 06/26/2019] [Indexed: 01/13/2023] Open
Abstract
While the genetic contributions to the predisposition of Bernese mountain dogs (BMDs) to histiocytic sarcoma (HS) remains unclear, some insights into key genetic drivers have been gained. Our group recently reported a mutation in the PTPN11 gene (E76K). We have now identified a second missense mutation in PTPN11 (G503V), and a mutation in KRAS (Q61H) present in HS cell lines. These mutations are associated with malignancies in humans, and known to be gain-of-function mutations that result in activation of the mitogen-activated protein kinase (MAPK) pathway. The goal of the present study was to evaluate the prevalence of these mutations in a large sample of HS cases from BMDs and golden retrievers, and in lymphoma cases, from a cohort of BMDs. Mutations in PTPN11 were present in HS in 41/96 (43%) BMDs, and in 3/13 (23%) golden retrievers. PTPN11 mutations E76K and G503V did not coexist in the same neoplasm. The KRAS mutation was much less frequent, with a prevalence of 3.1% (3/96). We did not identify either PTPN11 nor KRAS mutations in any of the lymphoma samples. These results point out the potential relevance of PTPN11 and KRAS mutations as activators of the oncogenic MAPK pathway for canine HS, particularly in BMDs.
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Affiliation(s)
- Marilia Takada
- Comparative Medicine and Integrative Biology Program, College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824, USA
| | - Lauren A Smyth
- Comparative Medicine and Integrative Biology Program, College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824, USA
| | - Tuddow Thaiwong
- Veterinary Diagnostic Laboratory, College of Veterinary Medicine, Michigan State University, Lansing, MI 48910, USA
| | - Marlee Richter
- Comparative Medicine and Integrative Biology Program, College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824, USA
| | - Sarah M Corner
- Veterinary Diagnostic Laboratory, College of Veterinary Medicine, Michigan State University, Lansing, MI 48910, USA
| | - Peter Z Schall
- Comparative Medicine and Integrative Biology Program, College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824, USA
| | - Matti Kiupel
- Veterinary Diagnostic Laboratory, College of Veterinary Medicine, Michigan State University, Lansing, MI 48910, USA
- Pathobiology & Diagnostic Investigation, College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824, USA
| | - Vilma Yuzbasiyan-Gurkan
- Comparative Medicine and Integrative Biology Program, College of Veterinary Medicine, Michigan State University, East Lansing, MI 48824, USA.
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Takada M, Smyth LA, Hix JM, Corner SM, Kiupel M, Yuzbasiyan-Gurkan V. Development of an Orthotopic Intrasplenic Xenograft Mouse Model of Canine Histiocytic Sarcoma and Its Use in Evaluating the Efficacy of Treatment with Dasatinib. Comp Med 2019; 69:22-28. [PMID: 30717820 DOI: 10.30802/aalas-cm-18-000065] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Canine histiocytic sarcoma is a highly aggressive and metastatic hematopoietic neoplasm that responds poorly to currently available treatment regimens. Our goal was to establish a clinically relevant xenograft mouse model to assess the preclinical efficacy of novel cancer treatment protocols for histiocytic sarcoma. We developed an intrasplenic xenograft mouse model characterized by consistent tumor growth and development of metastasis to the liver and other abdominal organs. This model represents the metastatic or disseminated form of canine histiocytic sarcoma, which is considered the most clinically challenging form of the disease. Transfection of tumor cells with a luciferase vector supported the use of in vivo bioluminescence imaging to track tumor progression over time and to assess the response of this murine model to novel chemotherapeutic agents. Dasatinib treatment of the mice with intrasplenic xenografts decreased tumor growth and increased survival times, compared with mice treated with vehicle only. Our findings indicate the potential of dasatinib for the treatment of histiocytic sarcoma in dogs and for similar diseases in humans. These results warrant additional studies to clinically test the efficacy of dasatinib in dogs with histiocytic sarcoma.
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Affiliation(s)
- Marilia Takada
- Comparative Medicine and Integrative Biology Program, Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, Wisconsin
| | - Lauren A Smyth
- Comparative Medicine and Integrative Biology Program, College of Veterinary Medicine, Michigan State University, East Lansing, Michigan
| | - Jeremy Ml Hix
- Department of Radiology, Comparative Medicine and Integrative Biology Program, College of Veterinary Medicine, Michigan State University, East Lansing, Michigan
| | - Sarah M Corner
- Pathobiology and Diagnostic Investigation, College of Veterinary Medicine, Michigan State University, East Lansing, Michigan
| | - Matti Kiupel
- Pathobiology and Diagnostic Investigation, College of Veterinary Medicine, Michigan State University, East Lansing, Michigan
| | - Vilma Yuzbasiyan-Gurkan
- Comparative Medicine and Integrative Biology Program, College of Veterinary Medicine, Michigan State University, East Lansing, Michigan;,
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Takada M, Hix JML, Corner S, Schall PZ, Kiupel M, Yuzbasiyan-Gurkan V. Targeting MEK in a Translational Model of Histiocytic Sarcoma. Mol Cancer Ther 2018; 17:2439-2450. [PMID: 30135215 DOI: 10.1158/1535-7163.mct-17-1273] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 05/09/2018] [Accepted: 08/16/2018] [Indexed: 12/25/2022]
Abstract
Histiocytic sarcoma in humans is an aggressive orphan disease with a poor prognosis as treatment options are limited. Dogs are the only species that spontaneously develops histiocytic sarcoma with an appreciable frequency, and may have value as a translational model system. In the current study, high-throughput drug screening utilizing histiocytic sarcoma cells isolated from canine neoplasms identified these cells as particularly sensitive to a MEK inhibitor, trametinib. One of the canine cell lines carries a mutation in PTPN11 (E76K), and another one in KRAS (Q61H), which are associated with the activation of oncogenic MAPK signaling. Both mutations were previously reported in human histiocytic sarcoma. Trametinib inhibited sensitive cell lines by promoting cell apoptosis, indicated by a significant increase in caspase 3/7. Furthermore, in vitro findings were successfully recapitulated in an intrasplenic orthotopic xenograft mouse model, which represents a disseminated aggressive form of histiocytic sarcoma. Mice with histiocytic sarcoma xenograft neoplasms that were treated with trametinib had significantly longer survival times. Target engagement was validated as activity of ERK, downstream of MEK, was significantly downregulated in neoplasms of treated mice. Additionally, trametinib was found in plasma and neoplastic tissues within projected therapeutic levels. These findings demonstrate that in dogs, histiocytic sarcoma may be associated with a dysfunctional MAPK pathway, at least in some cases, and may be effectively targeted through MEK inhibition. Clinical trials to test safety and efficacy of trametinib in dogs with histiocytic sarcoma are warranted, and may provide valuable translational information to similar diseases in humans. Mol Cancer Ther; 17(11); 2439-50. ©2018 AACR.
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Affiliation(s)
- Marilia Takada
- Comparative Medicine and Integrative Biology Program, Michigan State University, East Lansing, Michigan
| | - Jeremy M L Hix
- Department of Radiology, Michigan State University, East Lansing, Michigan
| | - Sarah Corner
- Comparative Medicine and Integrative Biology Program, Michigan State University, East Lansing, Michigan
| | - Peter Z Schall
- Comparative Medicine and Integrative Biology Program, Michigan State University, East Lansing, Michigan
| | - Matti Kiupel
- Pathobiology and Diagnostic Investigation, Michigan State University, East Lansing, Michigan
| | - Vilma Yuzbasiyan-Gurkan
- Comparative Medicine and Integrative Biology Program, Michigan State University, East Lansing, Michigan.
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Abstract
Ciclosporin is a lipophilic cyclic polypeptide with powerful immunosuppressive and immunomodulatory properties that has been used in veterinary medicine for two decades. It is a calcineurin inhibitor whose principal mode of action is to inhibit T cell activation. The drug is principally absorbed from the small intestine and is metabolised in the intestine and liver by the cytochrome P450 enzyme system. Ciclosporin is known to interact with a wide range of pharmacological agents. Numerous studies have demonstrated good efficacy for the management of canine atopic dermatitis and this has been a licensed indication since 2003. In addition to the treatment of atopic dermatitis, it has been used as an aid in the management of numerous other dermatological conditions in animals including perianal fistulation, sebaceous adenitis, pododermatitis, chronic otitis externa and pemphigus foliaceus. This article reviews the mode of action, pharmacokinetics, indications for use and efficacy of ciclosporin in veterinary dermatology.
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Affiliation(s)
- Peter Forsythe
- The Dermatology Referral Service, 528 Paisley Road West, Glasgow G51 1RN, UK
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Efficacy of Tetracycline and Niacinamide for the Treatment of Cutaneous Lupus Erythematosus in 17 Dogs (1997^|^ndash;2011). ACTA ACUST UNITED AC 2014. [DOI: 10.2736/jjvd.20.9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Kovalik M, Thoday KL, van den Broek AHM. The use of ciclosporin A in veterinary dermatology. Vet J 2012; 193:317-25. [PMID: 22609151 DOI: 10.1016/j.tvjl.2012.03.027] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2010] [Revised: 03/14/2012] [Accepted: 03/29/2012] [Indexed: 11/18/2022]
Abstract
Ciclosporin A (CsA) has potent immunosuppressive and immunomodulatory activity that has been exploited in human medicine to prevent the rejection of transplanted organs and to manage atopic dermatitis and psoriasis. Over the past decade, CsA has been employed more frequently in veterinary dermatology and its value in the management of several canine and feline dermatoses is now well established. CsA inhibits calcineurin phosphatase, suppressing T cell activation and the synthesis of T cell cytokines consequently impairing the activity of B cells, antigen-presenting cells, mast cells, basophils and eosinophils. The pharmacokinetics of CsA are similar in humans, dogs and cats and the drug has a wide safety margin in dogs, cats and rabbits. Adverse effects, principally transient vomiting and soft faeces/diarrhoea, may be seen shortly after instituting treatment but often resolve despite continuing treatment. Gingival hyperplasia and cutaneous effects such as hirsutism may occur after prolonged treatment.
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Affiliation(s)
- Marcel Kovalik
- The University of Edinburgh, Division of Veterinary Clinical Sciences, Dermatology Unit, The Royal (Dick) School of Veterinary Studies, The Hospital for Small Animals, Easter Bush Veterinary Centre, Roslin, Midlothian EH25 9RG, Scotland, UK.
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Efficacy of Tetracycline and Niacinamide for the Treatment of Superficial Pemphigus (Pemphigus Foliaceus, Pemphigus Erythematosus) in 34 Dogs (1995-2010). ACTA ACUST UNITED AC 2011. [DOI: 10.2736/jjvd.17.241] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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