1
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Chevallier L, Briand A, Reyes-Gomez E, Defer W, Millemann Y, Béguin J. Clinical, pathologic, and molecular characterization of a non-metastatic multicentric cutaneous mast cell tumor in a cow. Vet Clin Pathol 2024; 53:131-135. [PMID: 38418393 DOI: 10.1111/vcp.13336] [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: 07/27/2023] [Revised: 11/01/2023] [Accepted: 01/23/2024] [Indexed: 03/01/2024]
Abstract
Cutaneous mast cell tumors are rarely reported in cattle. Although mutations in the c-KIT gene have been shown to play a central role in the oncogenesis of canine mast cell tumors, few data are available in cattle. This report describes the clinical, histologic, immunohistochemical, and genetic features of a multicentric cutaneous mast cell tumor in an adult cow. An 11-year-old Prim'Holstein cow was presented for a 5-month history of multiple skin nodules. Cytologic and histologic analyses of the nodules led to a diagnosis of mast cell tumors. Immunohistochemical analysis for KIT expression showed a moderate to strong signal in neoplastic mast cells with a cytoplasmic and membranous pattern. Sequencing of the c-KIT gene coding sequence revealed no mutation. Despite partial response after corticosteroid treatment, euthanasia was elected. No metastases to the lymph nodes, spleen, and liver were identified at post-mortem and histologic examinations.
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Affiliation(s)
- Lucie Chevallier
- INSERM, UPEC, Ecole nationale vétérinaire d'Alfort, U955-IMRB, Team 10 - Biology of the Neuromuscular System, Maisons-Alfort, France
| | - Amaury Briand
- Ecole Nationale Vétérinaire d'Alfort, CHUV-Animaux de Compagnie, Unité de Dermatologie, Maisons-Alfort, France
| | - Edouard Reyes-Gomez
- INSERM, UPEC, Ecole nationale vétérinaire d'Alfort, U955-IMRB, Team 10 - Biology of the Neuromuscular System, Maisons-Alfort, France
- Ecole Nationale Vétérinaire d'Alfort, Biopôle Alfort, Laboratoire d'anatomo-Cytopathologie, Maisons-Alfort, France
| | - Wilfried Defer
- Ecole Nationale Vétérinaire d'Alfort, CHUV-Animaux de Production, Maisons-Alfort, France
| | - Yves Millemann
- Ecole Nationale Vétérinaire d'Alfort, CHUV-Animaux de Production, Maisons-Alfort, France
- ANSES, Laboratoire de Sécurité des Aliments, Maisons-Alfort, France
| | - Jérémy Béguin
- Department of Internal Medicine, Ecole Nationale Vétérinaire d'Alfort, CHUV-Animaux de Compagnie, Maisons-Alfort, France
- INRAE, ANSES, Ecole nationale vétérinaire d'Alfort, UMR Virologie, Maisons-Alfort, France
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2
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Pichard D, Kurtz M, Reyes-Gomez E, Manassero M, Maurey C. A Case of Urinary Bladder Malakoplakia in a Young French Bulldog: Diagnostic and Therapeutic Issues. Top Companion Anim Med 2023; 56-57:100804. [PMID: 37597743 DOI: 10.1016/j.tcam.2023.100804] [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] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Revised: 08/09/2023] [Accepted: 08/14/2023] [Indexed: 08/21/2023]
Abstract
A 3-month-old female French Bulldog presented with hematuria, severe pollakiuria, and urinary incontinence lasting for 1.5 months. Broad-spectrum empirical antibiotic therapy and nonsteroidal anti-inflammatory drugs were initiated by the referring veterinarian. Due to a lack of improvement, the dog was referred. At referral examination, urinary clinical signs persisted (hematuria, severe pollakiuria) and a firm bladder was noted. Abdominal ultrasonography revealed severe, diffuse bladder wall thickening with a significant reduction in the bladder lumen. Urinary tract endoscopy showed whitish exophytic proliferations throughout the entire bladder wall. Histological bladder wall analysis led to a diagnosis of bladder malakoplakia. Prolonged antibiotic therapy with fluoroquinolones was prescribed and resulted in clinical remission despite persistent bacteria in the bladder wall. This report describes a case of successfully medically managed bladder malakoplakia, a very rare condition in veterinary medicine, well documented in humans.
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Affiliation(s)
- Diane Pichard
- Internal Medicine Department, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort, France.
| | - Maxime Kurtz
- Internal Medicine Department, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort, France
| | - Edouard Reyes-Gomez
- Anatomical Pathology Department, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort, France
| | - Mathieu Manassero
- Surgery Department, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort, France
| | - Christelle Maurey
- Internal Medicine Department, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort, France
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3
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Jondeau C, Guyonnet A, Losada A, Laloy E, Reyes-Gomez E, Le Dudal M, Chahory S. A case of lipogranulomatous conjunctivitis in a horse. Vet Ophthalmol 2023; 26:452-457. [PMID: 37517078 DOI: 10.1111/vop.13136] [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] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 06/30/2023] [Accepted: 07/19/2023] [Indexed: 08/01/2023]
Abstract
OBJECTIVE To describe a case of lipogranulomatous conjunctivitis in a horse. ANIMAL STUDIED A client-owned 12-year-old Standardbred gelding presenting with chronic conjunctivitis and palpebral masses. METHODS Complete ophthalmic examination, surgical excision, histopathology, and bacterial culture of biopsy samples were performed. RESULTS Upper and lower eyelids of both eyes were affected, with multiple yellow-to-white nodules on the palpebral conjunctiva, adjacent to the eyelid margin. Nodule removal was achieved via partial tarsal plate excision. Histopathological examination revealed granulomatous inflammation and large droplets of presumed free lipid in the conjunctival lamina propria. The animal was diagnosed with lipogranulomatous conjunctivitis. No postoperative ocular discomfort was observed for months; however, 3 years later, new conjunctival nodules were noticed, requiring a second surgical procedure on three of the eyelids. Transient entropion in the left lower eyelid was observed 2 months after the second surgery, and no recurrence of conjunctival nodules was observed after 18 months of follow-up. CONCLUSION To our knowledge, this is the first report of lipogranulomatous conjunctivitis in horses.
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Affiliation(s)
- C Jondeau
- Ecole Nationale Vétérinaire d'Alfort, CHUVA, Unité d'Ophtalmologie, Maisons-Alfort, France
| | - A Guyonnet
- Centre Hospitalier Vétérinaire Atlantia, Unité d'Ophtalmologie, Nantes, France
| | - A Losada
- Clinique Vétérinaire Equine du Grand Renaud, Saint Saturnin, France
| | - E Laloy
- Ecole Nationale Vétérinaire d'Alfort, Unité d'Histologie et d'Anatomie pathologique, Maisons-Alfort, France
| | - E Reyes-Gomez
- Ecole Nationale Vétérinaire d'Alfort, Unité d'Histologie et d'Anatomie pathologique, Maisons-Alfort, France
| | - M Le Dudal
- Ecole Nationale Vétérinaire d'Alfort, Unité d'Histologie et d'Anatomie pathologique, Maisons-Alfort, France
| | - S Chahory
- Ecole Nationale Vétérinaire d'Alfort, CHUVA, Unité d'Ophtalmologie, Maisons-Alfort, France
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4
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Niewiadomska Z, Adib-Lesaux A, Reyes-Gomez E, Gandoin C, Bouillin C, Gaillard V, Fontbonne A. Uterine issues in infertile queens: nine cases. Anim Reprod Sci 2023; 251:107225. [PMID: 37003062 DOI: 10.1016/j.anireprosci.2023.107225] [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: 12/21/2022] [Revised: 03/23/2023] [Accepted: 03/24/2023] [Indexed: 03/29/2023]
Abstract
This prospective case series investigated potential uterine causes of infertility in queens. Purebred queens with infertility (failure to conceive, embryonic death, or failure to maintain pregnancy and produce viable kittens), but no other reproductive disorders were examined approximately 1-8 weeks before mating (Visit 1), 21 days after mating (Visit 2), and 45 days after mating (Visit 3) if pregnant at Visit 2. Investigations included vaginal cytology and bacteriology, urine bacteriology, and ultrasonography. At Visit 2 or 3, uterine biopsy or ovariohysterectomy was performed for histology. Of nine eligible queens, seven were non-pregnant by ultrasound at Visit 2 and two had lost pregnancies by Visit 3. Ovulation was confirmed by serum progesterone concentration in all queens. Ultrasonic appearance of the ovaries and uterus was compatible with a healthy status except for one queen with signs of cystic endometrial hyperplasia (CEH) and pyometra, a follicular cyst in another, and fetal resorptions in two queens. Six cats had histologic lesions of endometrial hyperplasia, including CEH (n=1). Only one cat had no histologic uterine lesions. Bacteria were cultured from vaginal samples in seven queens at Visit 1, (two were non-evaluable), and in five of seven queens sampled at Visit 2. Uterine cultures were negative except for the cat with pyometra. All urine cultures were negative. In summary, the most frequent pathology observed in these infertile queens was histologic endometrial hyperplasia, which can potentially inhibit embryo implantation and healthy placental development. This suggests that uterine disease might contribute substantially to infertility in purebred queens.
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Affiliation(s)
- Zuzanna Niewiadomska
- Unité de Médecine de L'Elevage et du Sport (UMES), École Nationale Vétérinaire d'Alfort, Maisons-Alfort, France
| | - Achraf Adib-Lesaux
- Royal Canin Research Center, 650 Avenue de la Petite Camargue, 30470 Aimargues, France
| | - Edouard Reyes-Gomez
- Unité d'Histologie et d'Anatomie Pathologique, Laboratoire d'Anatomo-Cytopathologie, Biopôle Alfort, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort, France
| | - Christelle Gandoin
- Unité de Bactériologie, Biopôle Alfort, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort, France
| | - Corinne Bouillin
- Unité de Bactériologie, Biopôle Alfort, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort, France
| | - Virginie Gaillard
- Royal Canin Research Center, 650 Avenue de la Petite Camargue, 30470 Aimargues, France.
| | - Alain Fontbonne
- Unité de Médecine de L'Elevage et du Sport (UMES), École Nationale Vétérinaire d'Alfort, Maisons-Alfort, France
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Blaga R, Fabres V, Leynaud V, Fontaine JJ, Reyes-Gomez E, Briand A, Crosaz O, Lagrange I, Blaizot A, Roux DL, Castillo VR, Maksimov P, Guillot J, Teifke JP, Schares G. Toxoplasma gondii and Alternaria sp.: An Original Association in an Immunosuppressed Dog with Persistent Skin Lesions. Pathogens 2023; 12:pathogens12010114. [PMID: 36678462 PMCID: PMC9865179 DOI: 10.3390/pathogens12010114] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/06/2023] [Accepted: 01/07/2023] [Indexed: 01/11/2023] Open
Abstract
Dogs and cats may suffer from a variety of diseases, mainly immune mediated, that require the administration of immunosuppressive drugs. Such therapies can cause adverse effects either by the toxicity of the drugs or as a consequence of immune suppression and associated opportunistic infections. Here we present an, yet unknown, association of Toxoplasma gondii and Alternaria fungus, within cutaneous lesions in a dog under long-term immunosuppressive therapy. The diagnosis of such infections is laborious and not obvious at first glance, since the clinical signs of cutaneous toxoplasmosis, neosporosis or alternariosis are not specific. A further laboratory confirmation is needed. Therefore, we currently recommend that dogs and cats should undergo serologic testing for toxoplasmosis or neosporosis prior to immunosuppressive therapy and a regular dermatological evaluation during the immunosuppressive therapy.
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Affiliation(s)
- Radu Blaga
- Anses, INRAE, Ecole Nationale Vétérinaire d’Alfort, Laboratoire de Santé Animale, BIPAR, F-94700 Maisons-Alfort, France
- Correspondence: ; Tel.: +33-1-43-96-72-15
| | - Virginie Fabres
- Ecole Nationale Vétérinaire d’Alfort, CHUVA, Unité de Médecine, F-94700 Maisons-Alfort, France
| | - Vincent Leynaud
- Ecole Nationale Vétérinaire d’Alfort, CHUVA, Unité de Médecine, F-94700 Maisons-Alfort, France
| | - Jean-Jacques Fontaine
- Ecole Nationale Vétérinaire d’Alfort, BioPôle, Laboratoire d’anatomo-cytopathologie, F-94700 Maisons-Alfort, France
| | - Edouard Reyes-Gomez
- Ecole Nationale Vétérinaire d’Alfort, BioPôle, Laboratoire d’anatomo-cytopathologie, F-94700 Maisons-Alfort, France
| | - Amaury Briand
- Ecole Nationale Vétérinaire d’Alfort, CHUVA, Unité de Dermatologie, F-94700 Maisons-Alfort, France
| | - Odile Crosaz
- Ecole Nationale Vétérinaire d’Alfort, CHUVA, Unité de Dermatologie, F-94700 Maisons-Alfort, France
| | - Isabelle Lagrange
- Ecole Nationale Vétérinaire d’Alfort, Biopôle, Laboratoire de Biochimie-hématologie, F-94700 Maisons-Alfort, France
| | - Amandine Blaizot
- Anses, INRAE, Ecole Nationale Vétérinaire d’Alfort, Laboratoire de Santé Animale, BIPAR, F-94700 Maisons-Alfort, France
| | - Delphine Le Roux
- Anses, INRAE, Ecole Nationale Vétérinaire d’Alfort, Laboratoire de Santé Animale, BIPAR, F-94700 Maisons-Alfort, France
| | - Veronica Risco Castillo
- Anses, INRAE, Ecole Nationale Vétérinaire d’Alfort, Laboratoire de Santé Animale, BIPAR, F-94700 Maisons-Alfort, France
| | - Pavlo Maksimov
- Institute of Epidemiology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Südufer 10, 17493 Greifswald, Germany
| | - Jacques Guillot
- Oniris, Department of Dermatology, Parasitology, Mycology, F-44300 Nantes, France
| | - Jens Peter Teifke
- Department of Experimental Animal Facilities and Biorisk Management, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, 17493 Greifswald, Germany
| | - Gereon Schares
- Institute of Epidemiology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Südufer 10, 17493 Greifswald, Germany
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Martineau M, Tilmant C, Risco Castillo V, Guillot J, Reyes-Gomez E, Benchekroun G, Freiche V. A case of feline gastrointestinal eosinophilic sclerosing fibroplasia associated with fungal colonisation: endoscopic features, treatment and follow-up. JFMS Open Rep 2023; 9:20551169231165246. [PMID: 37205163 PMCID: PMC10185866 DOI: 10.1177/20551169231165246] [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] [Indexed: 05/21/2023] Open
Abstract
Case summary A 5-year-old castrated male domestic shorthair cat presented with a 3-month history of weight loss, chronic diarrhoea and vomiting. Examination revealed a large proximal duodenal lesion eventually diagnosed as feline gastrointestinal eosinophilic sclerosing fibroplasia (FGESF) associated with fungal filaments. Histological examination was performed following endoscopic biopsy. Direct examination and mycological culture of the duodenal biopsies revealed the presence of a siphomycetous fungus, which was further identified as Rhizopus microsporus. Treatment with prednisolone and ciclosporin for 3 months led to complete resolution of the clinical signs and marked improvement of the endoscopic lesions. Specific fungal treatment with amphotericin B was poorly tolerated. Relevance and novel information To the best of our knowledge, this is the first report of the characterisation of a siphomycetous fungus associated with FGESF lesions, and the first endoscopic description and diagnosis of FGESF without surgical biopsies. We hypothesise that the presence of R microsporus occurred because of disrupted mucosal integrity.
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Affiliation(s)
- Michael Martineau
- National Veterinary School of Alfort, CHUVA,
Internal Medicine Unit, Maisons-Alfort, France
- Department of Internal Medicine, Frégis
Veterinary Hospital Centre, Arcueil, France
| | - Cyril Tilmant
- National Veterinary School of Alfort, CHUVA,
Internal Medicine Unit, Maisons-Alfort, France
- Department of Internal Medicine, Olliolis
Veterinary Clinic, Ollioules, France
| | - Veronica Risco Castillo
- Department of Parasitology and Mycology,
National Veterinary School of Alfort, BioPôle Alfort, Maisons-Alfort, France
| | - Jacques Guillot
- Department of Dermatology, Parasitology, and
Mycology, Oniris, Nantes, France
| | - Edouard Reyes-Gomez
- Department of Anatomical Pathology, National
Veterinary School of Alfort, BioPôle Alfort, Maisons-Alfort, France
| | - Ghita Benchekroun
- National Veterinary School of Alfort, CHUVA,
Internal Medicine Unit, Maisons-Alfort, France
| | - Valerie Freiche
- National Veterinary School of Alfort, CHUVA,
Internal Medicine Unit, Maisons-Alfort, France
- Valerie Freiche DVM, DESV-IM, PhD, Ecole Nationale
Vétérinaire d'Alfort, CHUVA, Unité de Médecine Interne, 7 avenue du Général de Gaulle,
Maisons-Alfort 94704, France
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7
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Kiener S, Chevallier L, Jagannathan V, Briand A, Cochet-Faivre N, Reyes-Gomez E, Leeb T. A COL5A2 In-Frame Deletion in a Chihuahua with Ehlers-Danlos Syndrome. Genes (Basel) 2022; 13:genes13050934. [PMID: 35627319 PMCID: PMC9142074 DOI: 10.3390/genes13050934] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 05/19/2022] [Accepted: 05/19/2022] [Indexed: 12/02/2022] Open
Abstract
Ehlers-Danlos syndrome (EDS) is a group of heterogeneous, rare diseases affecting the connective tissues. The main clinical signs of EDS are skin hyperextensibility, joint hypermobility, and skin fragility. Currently, the classification of EDS in humans distinguishes 13 clinical subtypes associated with variants in 20 different genes, reflecting the heterogeneity of this set of diseases. At present, variants in three of these genes have also been identified in dogs affected by EDS. The purpose of this study was to characterize the clinical and histopathological phenotype of an EDS-affected Chihuahua and to identify the causative genetic variant for the disease. The clinical examination suggested a diagnosis of classical EDS. Skin histopathology revealed an abnormally thin dermis, which is compatible with classical EDS. Whole-genome sequencing identified a heterozygous de novo 27 bp deletion in the COL5A2 gene, COL5A2:c.3388_3414del. The in-frame deletion is predicted to remove 9 amino acids in the triple-helical region of COL5A2. The molecular analysis and identification of a likely pathogenic variant in COL5A2 confirmed the subtype as a form of classical EDS. This is the first report of a COL5A2-related EDS in a dog.
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Affiliation(s)
- Sarah Kiener
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001 Bern, Switzerland; (S.K.); (V.J.)
- Dermfocus, University of Bern, 3001 Bern, Switzerland
| | - Lucie Chevallier
- “Biology of the Neuromuscular System” Team, INSERM, IMRB, Univ Paris-Est Créteil, Ecole Nationale Vétérinaire d’Alfort, 94700 Maisons-Alfort, France; (L.C.); (E.R.-G.)
| | - Vidhya Jagannathan
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001 Bern, Switzerland; (S.K.); (V.J.)
- Dermfocus, University of Bern, 3001 Bern, Switzerland
| | - Amaury Briand
- Unité de Dermatologie, ChuvA, Ecole Nationale Vétérinaire d’Alfort, 94700 Maisons-Alfort, France; (A.B.); (N.C.-F.)
| | - Noëlle Cochet-Faivre
- Unité de Dermatologie, ChuvA, Ecole Nationale Vétérinaire d’Alfort, 94700 Maisons-Alfort, France; (A.B.); (N.C.-F.)
| | - Edouard Reyes-Gomez
- “Biology of the Neuromuscular System” Team, INSERM, IMRB, Univ Paris-Est Créteil, Ecole Nationale Vétérinaire d’Alfort, 94700 Maisons-Alfort, France; (L.C.); (E.R.-G.)
- Unité d’Histologie et d’Anatomie Pathologique, BioPôle Alfort, Ecole Nationale Vétérinaire d’Alfort, 94700 Maisons-Alfort, France
| | - Tosso Leeb
- Institute of Genetics, Vetsuisse Faculty, University of Bern, 3001 Bern, Switzerland; (S.K.); (V.J.)
- Dermfocus, University of Bern, 3001 Bern, Switzerland
- Correspondence: ; Tel.: +41-31-684-2326
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8
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Gombert A, Diana A, Hecht S, Nicoli S, Fracassi F, Mortier J, Reyes-Gomez E, Pey P. Imaging features of retroperitoneal extra-adrenal paragangliomas in 10 dogs. Vet Radiol Ultrasound 2022; 63:393-402. [PMID: 35050528 PMCID: PMC9546460 DOI: 10.1111/vru.13063] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 10/31/2021] [Accepted: 12/11/2021] [Indexed: 11/29/2022] Open
Abstract
Retroperitoneal paragangliomas are rare tumors of the neuroendocrine system. Only a few canine case reports are available with rare descriptions of their imaging features. The objectives of this multi‐center, retrospective case series study were to describe the diagnostic imaging features of confirmed retroperitoneal paragangliomas and specify their location. Medical records and imaging studies of 10 affected dogs with cytological or histopathologic results concordant with retroperitoneal paragangliomas were evaluated. Dogs had a median age of 9 years. Four of them had clinical signs and laboratory reports compatible with excessive production of catecholamines. Six ultrasound, four CT, four radiographic, and one MRI studies were included. The paragangliomas did not have a specific location along the aorta. They were of various sizes (median 33 mm, range: 9–85 mm of length). Masses had heterogeneous parenchyma in six of 10 dogs, regardless of the imaging modality. Strong contrast enhancement was found in all CT studies. Encircling of at least one vessel was detected in six of 10 masses, clear invasion of a vessel was identified in one of 10 masses. In five of 10 cases, the masses were initially misconstrued as lymph nodes by the on‐site radiologist. Retroperitoneal paragangliomas appear along the abdominal aorta, often presenting heterogeneous parenchyma, possibly affecting the local vasculature, and displaying strong contrast enhancement on CT. Clinical signs can be secondary to mass effects or excessive catecholamine production. Underdiagnosis and misdiagnosis of this tumor are suspected as they can be silent, of small size, or confused with other structures.
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Affiliation(s)
- Alexis Gombert
- University Animal Hospital, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Alessia Diana
- Department of Veterinary Medical Science, Alma Mater Studiorum, University of Bologna, Ozzano Emilia, Italy
| | - Silke Hecht
- Department of Small Animal Clinical Sciences, University of Tennessee College of Veterinary Medicine, Knoxville, Tennessee, USA
| | | | - Federico Fracassi
- Department of Veterinary Medical Science, Alma Mater Studiorum, University of Bologna, Ozzano Emilia, Italy
| | - Jeremy Mortier
- Department of Small Animal Clinical Sciences, University of Liverpool, Neston, UK
| | - Edouard Reyes-Gomez
- Histology and Anatomical Pathology Unit, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort, France.,Ecole Nationale Vétérinaire d'Alfort, U955-IMRB, Inserm, UPEC, Maisons-Alfort, France
| | - Pascaline Pey
- Department of Veterinary Medical Science, Alma Mater Studiorum, University of Bologna, Ozzano Emilia, Italy
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9
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Di Girolamo N, Petrini D, Szabo Z, Volait-Rosset L, Oglesbee BL, Nardini G, Possenti M, Gerosa S, Rota S, Huynh M, Vitolo D, Devescovi E, Nicoletti A, Selleri P, Guillier D, Reese D, Nicolier A, Reyes-Gomez E, Matteucci G, Reavill DR, Binanti D. Clinical, surgical, and pathological findings in client-owned rabbits with histologically confirmed appendicitis: 19 cases (2015-2019). J Am Vet Med Assoc 2022; 260:82-93. [PMID: 34843442 DOI: 10.2460/javma.20.08.0446] [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: 11/20/2022]
Abstract
OBJECTIVE To report clinical, surgical, and pathological findings in client-owned rabbits with histologically confirmed appendicitis. ANIMALS 19 rabbits. PROCEDURES Medical records for client-owned rabbits that had a histologic diagnosis of appendicitis were reviewed. RESULTS Median age of the rabbits at presentation was 24.0 months (range, 4 to 84 months). Seventeen cases occurred during the summer and fall seasons. Decreased appetite (17/19 rabbits), abnormal rectal temperature (hyperthermia, 9/16 rabbits; hypothermia, 4/16 rabbits), hypocalcemia (8/11 rabbits), and hypoglycemia (7/15 rabbits) were common signs. Abdominal ultrasonography and CT findings were suggestive of appendicitis in 6 of 8 rabbits and in 1 of 2 rabbits, respectively. Of the 6 rabbits that received medical treatment, 3 died at 48 hours, 1 died at 24 hours after hospitalization, and 1 died at 10 days after presentation; 1 rabbit was alive at 1,030 days after presentation. Of the 8 rabbits that underwent appendectomy, 3 died before discharge from the hospital and 1 died 113 days after surgery; 4 rabbits were alive at 315, 334, 1,433, and 1,473 days after presentation. The remaining 5 rabbits either died or were euthanized before treatment could be instituted. In each of the 19 rabbits, the appendix had evidence of severe inflammation with mucosal ulceration, heterophilic inflammation, and necrotic debris. CLINICAL RELEVANCE For rabbits with decreased appetite and an apparently painful abdomen, hyperthermia, hypocalcemia, or hypoglycemia, appendicitis should be considered as a differential diagnosis. Further comparisons of medical and surgical treatments are required to establish treatment recommendations for rabbits with appendicitis.
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Affiliation(s)
- Nicola Di Girolamo
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Oklahoma State University, Stillwater, OK
| | | | - Zoltan Szabo
- Tai Wai Small Animal & Exotic Hospital, Tai Wai, Shatin, Sha Tin, Hong Kong
| | - Laetitia Volait-Rosset
- Exotic Animal Medicine and Surgery Unit, Alfort National Veterinary School, University of East Paris, Maisons-Alfort, France
| | | | | | - Marzia Possenti
- L'Arca Ambulatorio Veterinario Associato, Cassano d'Adda, Italy
| | | | | | - Minh Huynh
- Exotic Department, Centre Hospitalier Vétérinaire Frégis, Arcueil, France
| | | | | | | | | | - David Guillier
- Exotic Animal Medicine and Surgery Unit, Alfort National Veterinary School, University of East Paris, Maisons-Alfort, France
| | - David Reese
- VetCT Consultants in Telemedicine, Fremantle, WA, Australia
| | | | - Edouard Reyes-Gomez
- Unité d'Histologie et d'Anatomie Pathologique, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort, France
| | | | | | - Diana Binanti
- AbLab Veterinary Diagnostic Laboratory, Sarzana, Italy
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10
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Lamolet R, Manassero M, Reyes-Gomez E, Béguin J. [Long-term follow-up of a multimodally managed pulmonary mucoepidermoid carcinoma in a cat]. SCHWEIZ ARCH TIERH 2021; 163:295-300. [PMID: 33821802 DOI: 10.17236/sat00299] [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] [Indexed: 11/06/2022]
Abstract
INTRODUCTION The present case describes the treatment of a mucoepidermoid carcinoma in a 13-year-old female sterilized European domestic cat, using lung lobectomy and -accompanying mitoxantrone chemotherapy. Six, 14, 19 and 27 months after the initial treatment tomodensitometric and radiographic examinations showed no abnormalities. However, the cat had to be euthanized 27 months after the lung lobectomy due to a soft tissue sarcoma in the interscapular area.
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Affiliation(s)
- R Lamolet
- Ecole Nationale Vétérinaire d´Alfort, France
| | - M Manassero
- Ecole Nationale Vétérinaire d'Alfort, Unité de Chirurgie, France
| | - E Reyes-Gomez
- Ecole Nationale Vétérinaire d'Alfort, Unité d'Histologie et d'Anatomie Pathologique, France
| | - J Béguin
- Ecole Nationale Vétérinaire d'Alfort, Unité de Médecine, France
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11
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Chateau-Joubert S, Hopfe M, Richon S, Decaudin D, Roman-Roman S, Reyes-Gomez E, Bieche I, Nemati F, Dangles-Marie V. Spontaneous mouse lymphoma in patient-derived tumor xenografts: The importance of systematic analysis of xenografted human tumor tissues in preclinical efficacy trials. Transl Oncol 2021; 14:101133. [PMID: 34051622 PMCID: PMC8170170 DOI: 10.1016/j.tranon.2021.101133] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 04/26/2021] [Accepted: 05/19/2021] [Indexed: 11/18/2022] Open
Abstract
Patient-derived tumor xenograft (PDX) is now largely recognized as a key preclinical model for cancer research, mimicking patient tumor phenotype and genotype. Immunodeficient mice, well-known to develop spontaneous lymphoma, are required for PDX growth. As for all animal models used for further clinical translation, a robust experimental design is strongly required to lead to conclusive results. Here we briefly report unintentional co-engraftment of mouse lymphoma during expansion of well-established PDXs to illustrate the importance of systematic check of the PDX identity to avoid misinterpretation. Besides, this quality control based on complementary approaches deserves a more detailed description in materials and methods section to ensure experimental validity and reproducibility.
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Affiliation(s)
- Sophie Chateau-Joubert
- Unité d'Histologie et d'Anatomie Pathologique, Ecole Nationale Vétérinaire d'Alfort, 94704 Maisons-Alfort, France; Laboratoire d'anatomo-cytopathologie, BioPôle Alfort, Ecole Nationale Vétérinaire d'Alfort, 94704 Maisons-Alfort, France
| | - Miriam Hopfe
- Biologics Testing Solutions, Charles River Biopharmaceutical Services GmbH, Max-Planck-Str. 15A, 40699 Erkrath, Germany
| | - Sophie Richon
- Laboratory of preclinical investigation, Translational Research Department, Institut Curie, PSL Research University, 75005 Paris, France; UMR 144, Institut Curie, PSL Research University, CNRS, Paris, France
| | - Didier Decaudin
- Laboratory of preclinical investigation, Translational Research Department, Institut Curie, PSL Research University, 75005 Paris, France; Department of Medical Oncology, Institut Curie, 75005 Paris, France
| | - Sergio Roman-Roman
- Laboratory of preclinical investigation, Translational Research Department, Institut Curie, PSL Research University, 75005 Paris, France; Translational Research Department, Institut Curie, PSL Research University, 75005 Paris, France
| | - Edouard Reyes-Gomez
- Unité d'Histologie et d'Anatomie Pathologique, Ecole Nationale Vétérinaire d'Alfort, 94704 Maisons-Alfort, France; Laboratoire d'anatomo-cytopathologie, BioPôle Alfort, Ecole Nationale Vétérinaire d'Alfort, 94704 Maisons-Alfort, France; U955 - IMRB, Inserm, Ecole Nationale Vétérinaire d'Alfort, UPEC, Maisons-Alfort F-94700, France
| | - Ivan Bieche
- Department of Genetics, Pharmacogenomics Unit, Institut Curie, PSL Research University, Paris, France; Faculty of Pharmacy, Université Paris Descartes, Paris, France
| | - Fariba Nemati
- Laboratory of preclinical investigation, Translational Research Department, Institut Curie, PSL Research University, 75005 Paris, France
| | - Virginie Dangles-Marie
- Laboratory of preclinical investigation, Translational Research Department, Institut Curie, PSL Research University, 75005 Paris, France; Faculty of Pharmacy, Université Paris Descartes, Paris, France; In vivo Experiment Platform, PSL Research University, 75005 Paris, France.
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12
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Desprez I, Boyer C, Servely JL, Carlet-Lejallé A, Reyes-Gomez E, Donnelly TM, Pignon C. Assessment of the Respiratory Tract Distribution of Fluorescein by Nebulization in Rats (Rattus norvegicus). J Exot Pet Med 2019. [DOI: 10.1053/j.jepm.2018.01.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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13
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Pigat N, Reyes-Gomez E, Boutillon F, Palea S, Barry Delongchamps N, Koch E, Goffin V. Combined Sabal and Urtica Extracts (WS ® 1541) Exert Anti-proliferative and Anti-inflammatory Effects in a Mouse Model of Benign Prostate Hyperplasia. Front Pharmacol 2019; 10:311. [PMID: 30984003 PMCID: PMC6450068 DOI: 10.3389/fphar.2019.00311] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 03/14/2019] [Indexed: 12/19/2022] Open
Abstract
WS® 1541 is a phytopharmaceutical drug combination containing a lipophilic extract from fruits of Sabal serrulata (WS® 1473) and an aqueous ethanolic extract from roots of Urtica dioica (WS® 1031). It is approved in several countries worldwide for the treatment of lower urinary tract syndrome (LUTS) linked to benign prostate hyperplasia (BPH). Clinical studies have demonstrated the efficacy of this unique combination in the treatment of BPH-related LUTS. However, its mechanisms of action in vivo remain partly uncharacterized. The aim of this study was to take advantage of a validated mouse model of BPH to better characterize its growth-inhibitory and anti-inflammatory properties. We used the probasin–prolactin (Pb-PRL) transgenic mouse model in which prostate-specific overexpression of PRL results in several features of the human disease including tissue hypertrophy, epithelial hyperplasia, increased stromal cellularity, inflammation, and LUTS. Six-month-old heterozygous Pb-PRL male mice were randomly distributed to five groups (11–12 animals/group) orally treated for 28 consecutive days with WS® 1541 (300, 600, or 900 mg/kg/day), the 5α-reductase inhibitor finasteride used as reference (5 mg/kg/day) or vehicle (olive oil 5 ml/kg/day). Administration of WS® 1541 was well tolerated and caused a dose-dependent reduction of prostate weight (vs. vehicle) that was statistically significant at the two highest doses. This effect was accompanied by a reduction in prostate cell proliferation as assessed by lower Ki-67 expression (qPCR and immunohistochemistry). In contrast, finasteride had no or only a mild effect on these parameters. The growth-inhibitory activity of WS® 1541 was accompanied by a strong anti-inflammatory effect as evidenced by the reduced infiltration of cells expressing the leukocyte common antigen CD45. In sharp contrast, finasteride significantly increased the prostate inflammatory status according to this readout. Molecular profiling (qPCR) of 23 selected pro-inflammatory genes confirmed the strong anti-inflammatory potency of WS® 1541 compared to finasteride. Since treatment of WS® 1541 did not interfere with transgene expression and activity in the prostate of Pb-PRL mice, the effects observed in this study are entirely attributable to the intrinsic pharmacological action of the drug combination.
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Affiliation(s)
- Natascha Pigat
- PRL/GH Pathophysiology Laboratory, Institut Necker Enfants Malades, Unit 1151, Inserm, Paris, France.,Faculté de Médecine, Université Paris Descartes, Paris, France
| | - Edouard Reyes-Gomez
- Unité d'Histologie et d'Anatomie Pathologique, Laboratoire d'Anatomo-Cytopathologie, Biopôle Alfort, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort, France.,Inserm, U955 - IMRB, Ecole Nationale Vétérinaire d'Alfort, UPEC, Maisons-Alfort, France
| | - Florence Boutillon
- PRL/GH Pathophysiology Laboratory, Institut Necker Enfants Malades, Unit 1151, Inserm, Paris, France.,Faculté de Médecine, Université Paris Descartes, Paris, France
| | | | - Nicolas Barry Delongchamps
- PRL/GH Pathophysiology Laboratory, Institut Necker Enfants Malades, Unit 1151, Inserm, Paris, France.,Faculté de Médecine, Université Paris Descartes, Paris, France.,Urology Department, Hôpital Cochin, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Egon Koch
- Dr. Willmar Schwabe GmbH & Co. KG, Karlsruhe, Germany
| | - Vincent Goffin
- PRL/GH Pathophysiology Laboratory, Institut Necker Enfants Malades, Unit 1151, Inserm, Paris, France.,Faculté de Médecine, Université Paris Descartes, Paris, France
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14
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Briand A, Cochet-Faivre N, Reyes-Gomez E, Jaraud-Darnault A, Tiret L, Chevallier L. NIPAL4 deletion identified in an American Bully with autosomal recessive congenital ichthyosis and response to topical therapy. Vet Med Sci 2019; 5:112-117. [PMID: 30741495 PMCID: PMC6498511 DOI: 10.1002/vms3.149] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
Ichthyoses represent a heterogeneous group of hereditary cornification disorders characterized by generalized scaling of the skin. An autosomal recessive congenital ichthyosis (ARCI) has been described in American Bulldogs and is caused by a variant in the NIPAL4 gene encoding for the ICHTHYIN protein. So far, this variant has not been described in other breeds. A 1.5‐year‐old female pedigreed American Bully was referred for generalized scaling and bad coat quality since adoption at 8 weeks of age. Clinical examination, cytological and histopathological examination, and DNA testing were performed. Clinical examination revealed a generalized scaling; cytological evaluation using impression with acetate tapes showed a secondary Malassezia dermatitis. Histopathological examination revealed a moderate to marked, diffuse, compact orthokeratotic hyperkeratosis with the formation of large scales. Few Malassezia were observed in the stratum corneum associated with minimal mixed perivascular inflammation and moderate epidermal hyperplasia. DNA testing of the dog revealed that he carries two defective alleles of the NIPAL4 gene previously described in the American Bulldog. We performed a commercially available breed detection test which, although not specifically testing for “American Bully” signatures, revealed a high probability of American Bulldog DNA signature within the past three generations. Topical treatment using a combination of keratolytic and keratomodulator shampoo, emollient and moisturizers spray and antimicrobial wipes achieved a marked clinical improvement after only 1 month. Continuous topical treatment was necessary to maintain clinical improvement. To the authors’ knowledge, this is the first description of the deleterious NIPAL4 variant in an American Bully as well as the first description of clinical management and follow‐up of ARCI in this breed.
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Affiliation(s)
- Amaury Briand
- Department of Parasitology, Mycology, Dermatology, EA 7380 UPEC Dynamyc, Ecole nationale vétérinaire d'Alfort, Maisons-Alfort, France
| | - Noelle Cochet-Faivre
- Department of Parasitology, Mycology, Dermatology, EA 7380 UPEC Dynamyc, Ecole nationale vétérinaire d'Alfort, Maisons-Alfort, France
| | - Edouard Reyes-Gomez
- Anatomical Pathology Unit, BioPôle Alfort, Ecole nationale vétérinaire d'Alfort, Maisons-Alfort, France.,U955 - IMRB, Team 10 - Biology of the neuromuscular system, Inserm, UPEC, Ecole nationale vétérinaire d'Alfort, Maisons-Alfort, France
| | - Ambre Jaraud-Darnault
- U955 - IMRB, Team 10 - Biology of the neuromuscular system, Inserm, UPEC, Ecole nationale vétérinaire d'Alfort, Maisons-Alfort, France
| | - Laurent Tiret
- U955 - IMRB, Team 10 - Biology of the neuromuscular system, Inserm, UPEC, Ecole nationale vétérinaire d'Alfort, Maisons-Alfort, France
| | - Lucie Chevallier
- U955 - IMRB, Team 10 - Biology of the neuromuscular system, Inserm, UPEC, Ecole nationale vétérinaire d'Alfort, Maisons-Alfort, France
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15
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Dequéant B, Pascal Q, Bilbault H, Dagher E, Boschiroli ML, Cordonnier N, Reyes-Gomez E. Identification of Mycobacterium genavense natural infection in a domestic ferret. J Vet Diagn Invest 2019; 31:133-136. [PMID: 30475677 PMCID: PMC6505761 DOI: 10.1177/1040638718812137] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
A 6-y-old neutered male ferret ( Mustela putorius furo) was presented because of a 1-mo history of progressive weight loss, chronic cough, and hair loss. On clinical examination, the animal was coughing, slightly depressed, moderately hypothermic, and had bilateral epiphora. Thoracic radiography was suggestive of severe multinodular interstitial pneumonia. Abdominal ultrasound examination revealed hepatosplenomegaly and mesenteric and pancreaticoduodenal lymphadenopathy. Fine-needle aspiration of the pancreaticoduodenal lymph node, followed by routine Romanowsky and Ziehl-Neelsen stains, revealed numerous macrophages containing myriad acid-fast bacilli, leading to identification of mycobacteriosis. Autopsy and histologic examination confirmed the presence of disseminated, poorly defined, acid-fast, bacilli-rich granulomas in the pancreaticoduodenal and mesenteric lymph nodes, intestines, and lungs. Destaining of May-Grünwald/Giemsa-stained slides with alcohol, and then restaining with Ziehl-Neelsen, revealed acid-fast rods and avoided repeat tissue sampling without affecting the Ziehl-Neelsen stain quality and cytologic features. Tissue samples were submitted for a PCR assay targeting the heat shock protein gene ( hsp65) and revealed 100% homology with Mycobacterium genavense. We emphasize the use of special stains and PCR for identification of this potential zoonotic agent.
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Affiliation(s)
- Bérengère Dequéant
- LHA-Laboniris, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation Nantes, France (Dequéant)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, Biopôle, Unité d’Histologie, d’Embryologie et d’Anatomie pathologique, Département des Sciences Biologiques et Pharmaceutiques, Maisons-Alfort, France (Pascal, Bilbault, Cordonnier, Reyes-Gomez)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, UMR BIPAR, ANSES, INRA, Maisons-Alfort, France (Boschiroli)
- Pathology Department, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation, Nantes, France (Dagher)
| | - Quentin Pascal
- LHA-Laboniris, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation Nantes, France (Dequéant)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, Biopôle, Unité d’Histologie, d’Embryologie et d’Anatomie pathologique, Département des Sciences Biologiques et Pharmaceutiques, Maisons-Alfort, France (Pascal, Bilbault, Cordonnier, Reyes-Gomez)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, UMR BIPAR, ANSES, INRA, Maisons-Alfort, France (Boschiroli)
- Pathology Department, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation, Nantes, France (Dagher)
| | - Héloïse Bilbault
- Héloïse Bilbault, Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, Biopôle, Unité d’Histologie, d’Embryologie et d’Anatomie pathologique, Département des Sciences Biologiques et Pharmaceutiques, 7 rue du General de Gaulle, 94700, Maisons-Alfort, France.
| | - Elie Dagher
- LHA-Laboniris, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation Nantes, France (Dequéant)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, Biopôle, Unité d’Histologie, d’Embryologie et d’Anatomie pathologique, Département des Sciences Biologiques et Pharmaceutiques, Maisons-Alfort, France (Pascal, Bilbault, Cordonnier, Reyes-Gomez)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, UMR BIPAR, ANSES, INRA, Maisons-Alfort, France (Boschiroli)
- Pathology Department, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation, Nantes, France (Dagher)
| | - Maria-Laura Boschiroli
- LHA-Laboniris, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation Nantes, France (Dequéant)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, Biopôle, Unité d’Histologie, d’Embryologie et d’Anatomie pathologique, Département des Sciences Biologiques et Pharmaceutiques, Maisons-Alfort, France (Pascal, Bilbault, Cordonnier, Reyes-Gomez)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, UMR BIPAR, ANSES, INRA, Maisons-Alfort, France (Boschiroli)
- Pathology Department, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation, Nantes, France (Dagher)
| | - Nathalie Cordonnier
- LHA-Laboniris, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation Nantes, France (Dequéant)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, Biopôle, Unité d’Histologie, d’Embryologie et d’Anatomie pathologique, Département des Sciences Biologiques et Pharmaceutiques, Maisons-Alfort, France (Pascal, Bilbault, Cordonnier, Reyes-Gomez)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, UMR BIPAR, ANSES, INRA, Maisons-Alfort, France (Boschiroli)
- Pathology Department, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation, Nantes, France (Dagher)
| | - Edouard Reyes-Gomez
- LHA-Laboniris, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation Nantes, France (Dequéant)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, Biopôle, Unité d’Histologie, d’Embryologie et d’Anatomie pathologique, Département des Sciences Biologiques et Pharmaceutiques, Maisons-Alfort, France (Pascal, Bilbault, Cordonnier, Reyes-Gomez)
- Université Paris-Est, Ecole Nationale Vétérinaire d’Alfort, UMR BIPAR, ANSES, INRA, Maisons-Alfort, France (Boschiroli)
- Pathology Department, Oniris-Ecole Nationale Vétérinaire, Agroalimentaire et de l’Alimentation, Nantes, France (Dagher)
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16
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Hamon M, Dequeant B, Decambron A, Reyes-Gomez E, Manassero M. Leiomyoma in the nasal cavity of a dog. J Small Anim Pract 2018; 60:319-322. [PMID: 29355971 DOI: 10.1111/jsap.12822] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Revised: 01/23/2017] [Accepted: 05/16/2017] [Indexed: 01/10/2023]
Abstract
A 7-year-old, 34-kg, neutered male Labrador retriever was presented with a 1-year history of intermittent sneezing with occasional left-sided epistaxis. CT revealed a mass in the left nasal cavity. Histopathological analysis of rhinoscopy-guided tissue biopsies was consistent with chronic necrotic and ulcerative rhinitis. Surgical debridement by ventral rhinotomy was subsequently performed and histopathological diagnosis was leiomyoma. Complete resolution of the nasal discharge and reduced sneezing frequency were observed after surgery. Fourteen months postoperatively, CT detected no regrowth of the mass.
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Affiliation(s)
- M Hamon
- Department of Small Animal Surgery, Veterinary School of Alfort, University of Paris-Est, 94700 Paris, France
| | - B Dequeant
- Department of Pathology, Veterinary School of Alfort, University of Paris-Est, 94700 Paris, France
| | - A Decambron
- Department of Small Animal Surgery, Veterinary School of Alfort, University of Paris-Est, 94700 Paris, France
| | - E Reyes-Gomez
- Department of Pathology, Veterinary School of Alfort, University of Paris-Est, 94700 Paris, France
| | - M Manassero
- Department of Small Animal Surgery, Veterinary School of Alfort, University of Paris-Est, 94700 Paris, France
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17
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Sohier P, Legrand L, Aktary Z, Grill C, Delmas V, Bernex F, Reyes-Gomez E, Larue L, Vergier B. A histopathological classification system of Tyr::NRAS Q61K murine melanocytic lesions: A reproducible simplified classification. Pigment Cell Melanoma Res 2017; 31:423-431. [PMID: 29224244 DOI: 10.1111/pcmr.12677] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 11/12/2017] [Indexed: 12/29/2022]
Abstract
Genetically engineered mouse models offer essential opportunities to investigate the mechanisms of initiation and progression in melanoma. Here, we report a new simplified histopathology classification of mouse melanocytic lesions in Tyr::NRASQ61K derived models, using an interactive decision tree that produces homogeneous categories. Reproducibility for this classification system was evaluated on a panel of representative cases of murine melanocytic lesions by pathologists and basic scientists. Reproducibility, measured as inter-rater agreement between evaluators using a modified Fleiss' kappa statistic, revealed a very good agreement between observers. Should this new simplified classification be adopted, it would create a robust system of communication between researchers in the field of mouse melanoma models.
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Affiliation(s)
- Pierre Sohier
- Institut Curie, INSERM U1021, Normal and Pathological Development of Melanocytes, PSL Research University, Orsay, France.,CNRS UMR3347, Univ Paris-Sud, Univ Paris-Saclay, Orsay, France.,Equipe Labellisée Ligue Contre le Cancer, Orsay, France
| | - Léa Legrand
- INSERM U1053, Team 3 Oncogenesis of Cutaneous Lymphomas, Univ. Bordeaux, Bordeaux, France.,Pathology Department, CHU Bordeaux, Pessac, France
| | - Zackie Aktary
- Institut Curie, INSERM U1021, Normal and Pathological Development of Melanocytes, PSL Research University, Orsay, France.,CNRS UMR3347, Univ Paris-Sud, Univ Paris-Saclay, Orsay, France.,Equipe Labellisée Ligue Contre le Cancer, Orsay, France
| | - Christine Grill
- Institut Curie, INSERM U1021, Normal and Pathological Development of Melanocytes, PSL Research University, Orsay, France.,CNRS UMR3347, Univ Paris-Sud, Univ Paris-Saclay, Orsay, France.,Equipe Labellisée Ligue Contre le Cancer, Orsay, France
| | - Véronique Delmas
- Institut Curie, INSERM U1021, Normal and Pathological Development of Melanocytes, PSL Research University, Orsay, France.,CNRS UMR3347, Univ Paris-Sud, Univ Paris-Saclay, Orsay, France.,Equipe Labellisée Ligue Contre le Cancer, Orsay, France
| | | | - Edouard Reyes-Gomez
- INRA, UMR955 Génétique Fonctionnelle et Médicale, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort, France.,UMR955 Génétique Fonctionnelle et Médicale, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est, Maisons-Alfort, France.,Unité d'Embryologie, d'Histologie et d'Anatomie Pathologique, Ecole Nationale Vétérinaire d'Alfort, Université Paris-Est, Maisons-Alfort, France
| | - Lionel Larue
- Institut Curie, INSERM U1021, Normal and Pathological Development of Melanocytes, PSL Research University, Orsay, France.,CNRS UMR3347, Univ Paris-Sud, Univ Paris-Saclay, Orsay, France.,Equipe Labellisée Ligue Contre le Cancer, Orsay, France
| | - Béatrice Vergier
- INSERM U1053, Team 3 Oncogenesis of Cutaneous Lymphomas, Univ. Bordeaux, Bordeaux, France.,Pathology Department, CHU Bordeaux, Pessac, France
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18
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Vagney M, Desquilbet L, Reyes-Gomez E, Delisle F, Devauchelle P, Rodriguez-Piñeiro MI, Rosenberg D, de Fornel-Thibaud P. Survival times for cats with hyperthyroidism treated with a 3.35 mCi iodine-131 dose: a retrospective study of 96 cases. J Feline Med Surg 2017; 20:528-534. [PMID: 28699814 DOI: 10.1177/1098612x17718416] [Citation(s) in RCA: 8] [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] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Objectives Radioiodine (131I) dose determination using radiotracer kinetic studies or scoring systems, and fixed relatively high 131I dose (ie, 4 or 5 mCi) administration, are effective and associated with prolonged survival times for hyperthyroid cats. The latter method is less complicated but could expose patients and veterinary personnel to unnecessary levels of radiation. The aim of this study was to retrospectively evaluate the efficacy of a fixed 3.35 mCi 131I dose for the treatment of 96 hyperthyroid cats with no length estimation for any palpated goitre ⩾20 mm, assess outcome and identify factors associated with survival. Methods Serum total thyroxine concentrations at diagnosis and at follow-up times, survival times and cause of death were recorded. Multivariable Cox regression analysis was used to identify factors associated with time to any cause of death from 131I therapy initiation. Results Administration of a median (interquartile range) dose of 3.35 mCi (3.27-3.44 mCi) radioiodine was an effective treatment in 94/96 cats, but two cats remained hyperthyroid. No death related to hyperthyroidism was recorded. Median survival time was 3.0 years; the 1 and 2 year survival rates after 131I therapy were 90% and 78%, respectively. Low body weight (⩽3.1 kg; adjusted hazard ratio [aHR] 5.88; 95% confidence interval [CI] 2.22-16.67; P <0.01) and male gender (aHR 2.63; 95% CI 1.01-7.14; P = 0.04) were independently associated with death, whereas age, prior treatment with antithyroid drugs, reason for treatment and pretreatment azotaemia were not. Conclusions and relevance This study suggests that a fixed 3.35 mCi 131I dose treatment is effective for hyperthyroid cats with goitre(s) with a maximal length estimation <20 mm, that long-term survival can be achieved and that low body weight and male gender are significantly associated with shorter survival times.
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Affiliation(s)
| | - Loic Desquilbet
- 2 University of Paris-Est, National Veterinary School of Alfort, Clinical Epidemiology and Biostatistics Unit, Maisons Alfort, France
| | - Edouard Reyes-Gomez
- 3 University of Paris-Est, National Veterinary School of Alfort, BioPôle, Anatomical Pathology Unit, Maisons Alfort, France, and Faculty of Medicine, Créteil, France.,4 Inserm, IMRB U955-E10, Créteil, France
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Campagne C, Reyes-Gomez E, Picco ME, Loiodice S, Salaun P, Ezagal J, Bernex F, Commère PH, Pons S, Esquerre D, Bourneuf E, Estellé J, Maskos U, Lopez-Bergami P, Aubin-Houzelstein G, Panthier JJ, Egidy G. RACK1 cooperates with NRAS Q61K to promote melanoma in vivo. Cell Signal 2017; 36:255-266. [PMID: 28343944 DOI: 10.1016/j.cellsig.2017.03.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2016] [Revised: 03/20/2017] [Accepted: 03/22/2017] [Indexed: 12/24/2022]
Abstract
Melanoma is the deadliest skin cancer. RACK1 (Receptor for activated protein kinase C) protein was proposed as a biological marker of melanoma in human and domestic animal species harboring spontaneous melanomas. As a scaffold protein, RACK1 is able to coordinate the interaction of key signaling molecules implicated in both physiological cellular functions and tumorigenesis. A role for RACK1 in rewiring ERK and JNK signaling pathways in melanoma cell lines had been proposed. Here, we used a genetic approach to test this hypothesis in vivo in the mouse. We show that Rack1 knock-down in the mouse melanoma cell line B16 reduces invasiveness and induces cell differentiation. We have developed the first mouse model for RACK1 gain of function, Tyr::Rack1-HA transgenic mice, targeting RACK1 to melanocytes in vivo. RACK1 overexpression was not sufficient to initiate melanomas despite activated ERK and AKT. However, in a context of melanoma predisposition, RACK1 overexpression reduced latency and increased incidence and metastatic rate. In primary melanoma cells from Tyr::Rack1-HA, Tyr::NRasQ61K mice, activated JNK (c-Jun N-terminal kinase) and activated STAT3 (signal transducer and activator of transcription 3) acted as RACK1 oncogenic partners in tumoral progression. A sequential and coordinated activation of ERK, JNK and STAT3 with RACK1 is shown to accelerate aggressive melanoma development in vivo.
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Affiliation(s)
- C Campagne
- INRA, UMR955 Génétique Fonctionnelle et Médicale, Ecole Nationale Vétérinaire d'Alfort, F-94704 Maisons-Alfort, France; Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, UMR955 Génétique Fonctionnelle et Médicale, F-94704 Maisons-Alfort, France.
| | - E Reyes-Gomez
- INRA, UMR955 Génétique Fonctionnelle et Médicale, Ecole Nationale Vétérinaire d'Alfort, F-94704 Maisons-Alfort, France; Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, UMR955 Génétique Fonctionnelle et Médicale, F-94704 Maisons-Alfort, France; Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, Unité d'Embryologie, d'Histologie et d'Anatomie Pathologique, F-94704 Maisons-Alfort, France
| | - M E Picco
- Instituto de Medicina y Biologia Experimental, CONICET, Buenos Aires, Argentina
| | - S Loiodice
- INRA, UMR955 Génétique Fonctionnelle et Médicale, Ecole Nationale Vétérinaire d'Alfort, F-94704 Maisons-Alfort, France; Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, UMR955 Génétique Fonctionnelle et Médicale, F-94704 Maisons-Alfort, France
| | - P Salaun
- INRA, UMR955 Génétique Fonctionnelle et Médicale, Ecole Nationale Vétérinaire d'Alfort, F-94704 Maisons-Alfort, France; Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, UMR955 Génétique Fonctionnelle et Médicale, F-94704 Maisons-Alfort, France
| | - J Ezagal
- INRA, UMR955 Génétique Fonctionnelle et Médicale, Ecole Nationale Vétérinaire d'Alfort, F-94704 Maisons-Alfort, France; Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, UMR955 Génétique Fonctionnelle et Médicale, F-94704 Maisons-Alfort, France
| | - F Bernex
- INRA, UMR955 Génétique Fonctionnelle et Médicale, Ecole Nationale Vétérinaire d'Alfort, F-94704 Maisons-Alfort, France; Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, UMR955 Génétique Fonctionnelle et Médicale, F-94704 Maisons-Alfort, France; Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, Unité d'Embryologie, d'Histologie et d'Anatomie Pathologique, F-94704 Maisons-Alfort, France
| | - P H Commère
- Plateforme de Cytométrie, Département d'Immunologie, Institut Pasteur, F-75724 Paris, France
| | - S Pons
- Unité Neurobiologie Intégrative des Systèmes Cholinergiques, UMR 3571, CNRS, Institut Pasteur, F75724 Paris Cedex 15, France
| | - D Esquerre
- GenPhySE, Université de Toulouse, INRA, INPT, ENVT, Castanet Tolosan, France
| | - E Bourneuf
- GABI, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France; LREG, CEA, Université Paris-Saclay, F-78352 Jouy-en-Josas, France
| | - J Estellé
- GABI, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France
| | - U Maskos
- Unité Neurobiologie Intégrative des Systèmes Cholinergiques, UMR 3571, CNRS, Institut Pasteur, F75724 Paris Cedex 15, France
| | - P Lopez-Bergami
- Instituto de Medicina y Biologia Experimental, CONICET, Buenos Aires, Argentina; Centro de Estudios Biomédicos, Biotecnologicos, Ambientales y Diagnostico, Universidad Malmonides, CONICET, Buenos Aires, Argentina
| | - G Aubin-Houzelstein
- INRA, UMR955 Génétique Fonctionnelle et Médicale, Ecole Nationale Vétérinaire d'Alfort, F-94704 Maisons-Alfort, France; Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, UMR955 Génétique Fonctionnelle et Médicale, F-94704 Maisons-Alfort, France
| | - J J Panthier
- INRA, UMR955 Génétique Fonctionnelle et Médicale, Ecole Nationale Vétérinaire d'Alfort, F-94704 Maisons-Alfort, France; Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, UMR955 Génétique Fonctionnelle et Médicale, F-94704 Maisons-Alfort, France; CNRS URM 3738, USC INRA 2026, F-75724, France; Institut Pasteur, Département de Biologie du Développement et Cellules Souches, Génétique fonctionnelle de la Souris, 25 rue du Docteur Roux, Paris F-75724, France
| | - G Egidy
- INRA, UMR955 Génétique Fonctionnelle et Médicale, Ecole Nationale Vétérinaire d'Alfort, F-94704 Maisons-Alfort, France; Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, UMR955 Génétique Fonctionnelle et Médicale, F-94704 Maisons-Alfort, France; GABI, INRA, AgroParisTech, Université Paris-Saclay, Jouy-en-Josas, France.
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20
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Bernichtein S, Pigat N, Barry Delongchamps N, Boutillon F, Verkarre V, Camparo P, Reyes-Gomez E, Méjean A, Oudard SM, Lepicard EM, Viltard M, Souberbielle JC, Friedlander G, Capiod T, Goffin V. Vitamin D3 Prevents Calcium-Induced Progression of Early-Stage Prostate Tumors by Counteracting TRPC6 and Calcium Sensing Receptor Upregulation. Cancer Res 2016; 77:355-365. [PMID: 27879271 DOI: 10.1158/0008-5472.can-16-0687] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 10/28/2016] [Accepted: 10/31/2016] [Indexed: 01/29/2023]
Abstract
Active surveillance has emerged as an alternative to immediate treatment for men with low-risk prostate cancer. Accordingly, identification of environmental factors that facilitate progression to more aggressive stages is critical for disease prevention. Although calcium-enriched diets have been speculated to increase prostate cancer risk, their impact on early-stage tumors remains unexplored. In this study, we addressed this issue with a large interventional animal study. Mouse models of fully penetrant and slowly evolving prostate tumorigenesis showed that a high calcium diet dramatically accelerated the progression of prostate intraepithelial neoplasia, by promoting cell proliferation, micro-invasion, tissue inflammation, and expression of acknowledged prostate cancer markers. Strikingly, dietary vitamin D prevented these calcium-triggered tumorigenic effects. Expression profiling and in vitro mechanistic studies showed that stimulation of PC-3 cells with extracellular Ca2+ resulted in an increase in cell proliferation rate, store-operated calcium entry (SOCE) amplitude, cationic channel TRPC6, and calcium sensing receptor (CaSR) expression. Notably, administration of the active vitamin D metabolite calcitriol reversed all these effects. Silencing CaSR or TRPC6 expression in calcium-stimulated PC3 cells decreased cell proliferation and SOCE. Overall, our results demonstrate the protective effects of vitamin D supplementation in blocking the progression of early-stage prostate lesions induced by a calcium-rich diet. Cancer Res; 77(2); 355-65. ©2016 AACR.
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Affiliation(s)
- Sophie Bernichtein
- Inserm Unit 1151, Institut Necker Enfants Malades (INEM), Université Paris Descartes, Paris, France
| | - Natascha Pigat
- Inserm Unit 1151, Institut Necker Enfants Malades (INEM), Université Paris Descartes, Paris, France
| | - Nicolas Barry Delongchamps
- Inserm Unit 1151, Institut Necker Enfants Malades (INEM), Université Paris Descartes, Paris, France.,Urology Department, Hôpital Cochin, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Florence Boutillon
- Inserm Unit 1151, Institut Necker Enfants Malades (INEM), Université Paris Descartes, Paris, France
| | - Virginie Verkarre
- Pathology Department, Hôpital Européen Georges Pompidou, Assistance Publique Hôpitaux de Paris, Paris, France
| | | | - Edouard Reyes-Gomez
- Ecole Nationale Vétérinaire d'Alfort, Laboratoire d'anatomo-cytopathologie, Inserm, IMRB U955-E10, Université Paris-Est, Maisons-Alfort, Paris, France
| | - Arnaud Méjean
- Urology Department, Hôpital Européen Georges Pompidou, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Stéphane M Oudard
- Medical Oncology Department, Hôpital Européen Georges Pompidou, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Eve M Lepicard
- Institute for European Expertise in Physiology, Paris, France
| | - Mélanie Viltard
- Institute for European Expertise in Physiology, Paris, France
| | - Jean-Claude Souberbielle
- Physiology Department, Hôpital Européen Georges Pompidou, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Gérard Friedlander
- Inserm Unit 1151, Institut Necker Enfants Malades (INEM), Université Paris Descartes, Paris, France
| | - Thierry Capiod
- Inserm Unit 1151, Institut Necker Enfants Malades (INEM), Université Paris Descartes, Paris, France
| | - Vincent Goffin
- Inserm Unit 1151, Institut Necker Enfants Malades (INEM), Université Paris Descartes, Paris, France.
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Ruiz GC, Reyes-Gomez E, Hall EJ, Freiche V. Comparison of 3 Handling Techniques for Endoscopically Obtained Gastric and Duodenal Biopsy Specimens: A Prospective Study in Dogs and Cats. J Vet Intern Med 2016; 30:1014-21. [PMID: 27396683 PMCID: PMC5108414 DOI: 10.1111/jvim.14403] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 05/07/2016] [Accepted: 06/15/2016] [Indexed: 12/28/2022] Open
Abstract
Background Limited evidence exists in the literature regarding whether a specific mount is preferable to use for processing endoscopically obtained gastrointestinal biopsy specimens. Hypothesis/Objectives To compare 3 methods of handling endoscopically obtained gastrointestinal biopsy specimens from collection to laboratory processing and to determine if any technique produced superior results. Animals Twenty‐three dogs and cats presented for gastrointestinal signs. Methods Prospective study of dogs and cats presented with gastrointestinal signs to a veterinary teaching referral hospital which underwent upper gastrointestinal endoscopy. Biopsy specimens were taken from the stomach and duodenum and submitted to the laboratory using 3 techniques: mounted on a cucumber slice, mounted on a moisturized synthetic foam sponge, and floating free in formalin. The techniques were compared with regard to the specimens' width, orientation, presence of artifacts, and pathologist's confidence in diagnosis. Results Twenty‐three patients were included, with a total of 528 biopsies collected. Specimens on cucumber slice and on sponge were significantly wider (P < .001 and P = .001, respectively) compared to those floating free in formalin (mean width of 3.81 versus 3.31 and 2.52 mm, respectively). However, specimens on synthetic sponge had significantly fewer artifacts compared to those on cucumber slice (P = .05) and those floating free in formalin (P = .02). Confidence in the diagnosis also was superior with the sponge technique over floating free specimens (P = .002). Conclusions and Clinical Importance The use of mounted gastrointestinal biopsy specimens was superior over the use of specimens floating free in formalin. This technique improved the quality of the specimens and the pathologist's confidence in their histopathologic interpretation.
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Affiliation(s)
- G C Ruiz
- Internal Medicine Department, Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort Cedex, France.,Langford Veterinary Services, Internal Medicine Department, Small Animal Referral Hospital, University of Bristol, Langford, UK
| | - E Reyes-Gomez
- Anatomical Pathology Unit, Biopôle, Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort Cedex, France
| | - E J Hall
- Langford Veterinary Services, Internal Medicine Department, Small Animal Referral Hospital, University of Bristol, Langford, UK
| | - V Freiche
- Internal Medicine Department, Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort Cedex, France
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22
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Grosset C, Bellier S, Lagrange I, Moreau S, Hedley J, Hawkins M, Reyes-Gomez E. Cutaneous Botryomycosis in a Campbell’s Russian Dwarf Hamster (Phodopus campbelli). J Exot Pet Med 2014. [DOI: 10.1053/j.jepm.2014.07.002] [Citation(s) in RCA: 4] [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: 11/11/2022]
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Abstract
A three‐year‐old male neutered domestic shorthair cat was presented for loss of vision associated with hyperthermia, lethargy and anorexia. Ophthalmic examination revealed a bilateral panuveitis. Cytological examination of aqueous and vitreous humours was performed and revealed a suppurative inflammation associated with numerous cocci. Enterococcus faecalis was identified by bacterial culture from aqueous and vitreous humour. No primary infection site was identified. Active uveitis resolved after systemic antibiotic therapy, but the vision loss was permanent. To the authors’ knowledge, this is the first reported case of endogenous bacterial endophthalmitis secondary to E. faecalis infection in a cat.
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Affiliation(s)
- E Donzel
- Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, Unité de Recherche en Ophtalmologie Vétérinaire, Maisons-Alfort Cedex, France
| | - E Reyes-Gomez
- Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, Unité d'embryologie, d'Histologie et d'Anatomie Pathologique, Maisons-Alfort Cedex, France
| | - S Chahory
- Université Paris-Est, Ecole Nationale Vétérinaire d'Alfort, Unité de Recherche en Ophtalmologie Vétérinaire, Maisons-Alfort Cedex, France
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24
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Campagne C, Reyes-Gomez E, Battistella M, Bernex F, Château-Joubert S, Huet H, Beermann F, Aubin-Houzelstein G, Egidy G. Histopathological atlas and proposed classification for melanocytic lesions in Tyr::NRas(Q61K) ; Cdkn2a(-/-) transgenic mice. Pigment Cell Melanoma Res 2013; 26:735-42. [PMID: 23647911 DOI: 10.1111/pcmr.12115] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Cécile Campagne
- UMR955 de Génétique fonctionnelle et médicale, Ecole Nationale Vétérinaire d'Alfort, INRA, Maisons-Alfort, France
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Houzelstein D, Reyes-Gomez E, Maurer M, Netter P, Higuet D. Expression patterns suggest that despite considerable functional redundancy, galectin-4 and -6 play distinct roles in normal and damaged mouse digestive tract. J Histochem Cytochem 2013; 61:348-61. [PMID: 23360694 DOI: 10.1369/0022155413478612] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
The galectin-4 protein is mostly expressed in the digestive tract and is associated with lipid raft stabilization, protein apical trafficking, wound healing, and inflammation. While most mammalian species, including humans, have a single Lgals4 gene, some mice have two paralogues: Lgals4 and Lgals6. So far, their significant similarities have hindered the analysis of their respective expression and function. We took advantage of two antibodies that discriminate between the galectin-4 and galectin-6 proteins to document their patterns of expression in the normal and the dextran sodium sulfate (DSS)-damaged digestive tract in the mouse. In the normal digestive tract, their pattern of expression from tongue to colon is quite similar, which suggests functional redundancy. However, the presence of galectin-4, but not galectin-6, in the lamina propria of the DSS-damaged colon, its association with luminal colonic bacteria, and differences in subcellular localization of these proteins suggest that they also have distinct roles in the normal and the damaged mouse digestive tract. Our results provide a rare example of ancestral and derived functions evolving after tandem gene duplication.
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Affiliation(s)
- Denis Houzelstein
- Equipe Génétique et Evolution, UMR7138, CNRS and Université Pierre et Marie Curie, 75252 Paris Cedex 05, France.
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26
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Laloy E, Chateau-Joubert S, El Mrini M, Rakotovao F, Carlus M, Reyes-Gomez E, Delfosse V, Cordonnier N. A Case of Scrotal Leiomyosarcoma in a Dog. J Comp Pathol 2013. [DOI: 10.1016/j.jcpa.2012.11.084] [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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Abstract
Cet article rapporte un cas de leishmaniose féline disséminée chez un chat (Felis catus) de 14 ans, séropositif pour le FIV et vivant dans les Alpes-Maritimes (sud de la France). Le chat présente des papules érythémateuses ulcérées sur la face et l’encolure, et une lésion proliférative ulcérée sur l’oreille gauche. C’est l’examen histopathologique des lésions cutanées qui permet le diagnostic d’une leishmaniose disséminée, associée à un carcinome épidermoïde de l’oreille. 100 mg d’allopurinol administrés une fois par jour per os pendant quatre mois ont permis la rémission totale des lésions cutanées. Des prélèvements post mortem ont révélé la persistance du parasite dans l’organisme après six mois de traitement. Cet article discute de la sensibilité du chat à la leishmaniose et de son rôle potentiel de réservoir.
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Affiliation(s)
- E Pocholle
- Université de Liège, boulevard de Colonster 20, 4000 Liège (Sart Tilman), Belgique.
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28
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Djian-Zaouche J, Campagne C, Reyes-Gomez E, Gadin-Czerw S, Bernex F, Louise A, Relaix F, Buckingham M, Panthier JJ, Aubin-Houzelstein G. Pax3( GFP ) , a new reporter for the melanocyte lineage, highlights novel aspects of PAX3 expression in the skin. Pigment Cell Melanoma Res 2012; 25:545-54. [PMID: 22621661 DOI: 10.1111/j.1755-148x.2012.01024.x] [Citation(s) in RCA: 10] [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] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The paired box gene 3 (Pax3) is expressed during pigment cell development. We tested whether the targeted allele Pax3(GFP) can be used as a reporter gene for pigment cells in the mouse. We found that enhanced green fluorescent protein (GFP) can be seen readily in every melanoblast and melanocyte in the epidermis and hair follicles of Pax3(GFP/+) heterozygotes. The GFP was detected at all differentiation stages, including melanocyte stem cells. In the dermis, Schwann cells and nestin-positive cells of the piloneural collars resembling the nestin-positive hair follicle multipotent stem cells exhibited a weaker GFP signal. Pigment cells could be purified by fluorescent activated cell sorting and grown in vitro without feeder cells, giving pure cultures of melanocytes. The Schwann cells and nestin-positive cells of the piloneural collars were FACS-isolated based on their weak expression of GFP. Thus Pax3(GFP) can discriminate distinct populations of cells in the skin.
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Affiliation(s)
- Johanna Djian-Zaouche
- INRA, UMR955 Génétique Fonctionnelle et Médicale, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort, France
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29
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Mir F, Fontaine E, Reyes-Gomez E, Carlus M, Fontbonne A. Subclinical leishmaniasis associated with infertility and chronic prostatitis in a dog. J Small Anim Pract 2012; 53:419-22. [PMID: 22690941 DOI: 10.1111/j.1748-5827.2012.01224.x] [Citation(s) in RCA: 21] [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] [Received: 08/10/2011] [Revised: 03/07/2012] [Accepted: 03/28/2012] [Indexed: 11/27/2022]
Abstract
A stud dog was presented for acquired infertility. Haematospermia and teratozoospermia were found on two ejaculates 2 weeks apart. A presumptive diagnosis of prostatitis was made follo-wing ultrasound examination. An ultrasound-guided needle core biopsy was performed under general anaesthesia, revealing a mild chronic macrophagic and plasma cell prostatitis with intracytoplasmic amastigotes consistent with Leishmania spp. infection. Presence of Leishmania infantum, Leishmania donovani or Leishmania chagasi was confirmed by polymerase chain reaction in seminal plasma. Serology and serum protein electrophoresis confirmed the diagnosis of a subclinical active systemic leishmaniasis. A meglumine antimoniate and allopurinol treatment was given which clearly improved within 3 months both general condition and the quality of sperm. To the authors' knowledge, this is the first reported case of a prostatitis secondary to a Leishmania spp. infection. Subclinical systemic leishmaniasis should be considered in the differential diagnosis of infertility in dogs suffering from semen alterations.
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Affiliation(s)
- F Mir
- Centre d'Études en Reproduction des Carnivores, Alfort Veterinary School, Maisons Alfort, France
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30
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Grosset C, Reyes-Gomez E, Hedley J, Stambouli F. Aneurysmal bone cyst on the carpus of an African collared dove (Streptopelia roseogrisea). J Avian Med Surg 2012; 26:11-6. [PMID: 22645834 DOI: 10.1647/2011-001.1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
An adult female African collared dove (Streptopelia roseogrisea) was presented for examination of a mass on the medial surface of the left wing. The mass had been present for 2 months but had grown rapidly over the previous 2 weeks. One week after presentation, the mass was surgically excised and the involved alular bone was removed. Results of histologic examination of the mass were consistent with an aneurysmal bone cyst. No underlying factor could be found in this case. The wound healing was uneventful, and no mass recurrence was observed during the following year. To our knowledge, this is the first report of an aneurysmal bone cyst in a columbiform bird.
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Affiliation(s)
- Claire Grosset
- Exotic Pets Unit, Ecole Nationale Vétérinaire d'Alfort, Maisons-Alfort, 7 avenue du Général de Gaulle, Cedex, 94700 France
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31
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Uriarte A, Moissonnier P, Thibaud JL, Reyes-Gomez E, Devauchelle P, Blot S. Surgical treatment and radiation therapy of frontal lobe meningiomas in 7 dogs. Can Vet J 2011; 52:748-752. [PMID: 22210938 PMCID: PMC3119237] [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: 05/31/2023]
Abstract
The cases of 7 adult dogs with generalized seizures managed by surgical excision and radiation therapy for frontal lobe meningiomas were reviewed. The neurological examination was unremarkable in 6 of the 7 dogs. Five dogs were operated on using a bilateral transfrontal sinus approach and 2 using a unilateral sinotemporal approach to the frontal lobe. One dog was euthanized 14 d after surgery; radiation therapy was initiated 3 wk after surgery in the remaining 6 dogs. Long-term follow-up consisted of neurological examination and magnetic resonance imaging (MRI) and/or computed tomography (CT) scan after radiation therapy. The mean survival time for dogs that had surgery and radiation therapy was 18 mo after surgery. Frontal lobe meningiomas have been associated with poor prognosis. However, the surgical approaches used in these cases, combined with radiation therapy, allow a survival rate for frontal lobe meningiomas similar to that for meningiomas located over the cerebral convexities.
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Affiliation(s)
- Ane Uriarte
- Unité medico-chirurgicale de neurologie, Ecole Nationale Vétérinaire d'Alfort, Centre de Cancérologie Vétérinaire (Devauchel) - 7 Avenue du Générale du Gaulle-94700-Maisons-Alfort, France.
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32
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Laurent S, Thibaud JL, Hordeaux J, Reyes-Gomez E, Delisle F, Blot S, Colle MA. Chronic traumatic brain injury in a dog. J Comp Pathol 2010; 143:75-80. [PMID: 20106486 DOI: 10.1016/j.jcpa.2009.12.008] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2009] [Revised: 10/27/2009] [Accepted: 12/19/2009] [Indexed: 11/30/2022]
Abstract
Chronic traumatic brain injury is rare in man and has not been previously documented in dogs. This report describes a 2-year-old female American Staffordshire bull terrier that was referred with forelimb and hindlimb ataxia, decreased vigilance and disorientation following repeated aggression and physical abuse by its owner. A diffuse cortical lesion was suspected. Cerebrospinal fluid analysis revealed neutrophilic pleocytosis and computed tomography showed marked widening of the cerebral sulci with mild bilateral ventriculomegaly. The dog was humanely destroyed in view of the poor prognosis. Necropsy examination revealed narrowing of the cerebral cortical gyri and consequent widening of the sulci without distortion or displacement of the neural parenchyma. These features were consistent with bilateral diffuse cortical atrophy. Microscopically, there were chronic subarachnoid haemorrhages and the cortical subpial layer displayed spongiosis, capillary hyperplasia, astrocytosis, microgliosis and frequent neuronal necrosis occurring in a characteristic laminar pattern. This histopathological pattern of damage was significantly different from that previously described in people suffering from repeated traumatic brain injuries over a long period of time.
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Affiliation(s)
- S Laurent
- Unité d'Anatomie Pathologique, UMR 703 INRA/ENVN, Ecole Nationale Vétérinaire de Nantes, Route de Gachet, Atlanpole-La Chantrerie BP 40706, 44307 Nantes, Loire-Atlantique, France
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Volmer C, Caplier L, Reyes-Gomez E, Huet H, Owen RA, Fontaine JJ. An atypical peripheral nerve sheath tumour with pseudoglandular architecture in a dog. J Vet Med Sci 2009; 72:249-51. [PMID: 19942806 DOI: 10.1292/jvms.09-0362] [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: 11/22/2022] Open
Abstract
This case describes a subcutaneous soft tissue tumour in a German Shepherd dog. Histologically, the lesion was characterized by proliferating ovoid cells, loosely arranged in a collagenous to myxoid stroma, and by numerous pseudoglandular structures lined by neoplastic cells. Immunohistochemically, neoplastic cells were labelled with vimentin, glial fibrillary acidic protein and S100 antibodies, but not with cytokeratin, desmin and smooth muscle actin antibodies. Ultrastructurally, neoplastic cells were characterized by numerous mitochondria surrounded by endoplasmic reticulum and contained few secondary lysosomes. This tumour was diagnosed as a subcutaneous peripheral nerve sheath tumour (PNST) with pseudoglandular architecture. This case illustrates the morphological diversity of PNST and provides new insight into the differential diagnosis of cutaneous tumours of similar morphology in the dog.
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Affiliation(s)
- Christelle Volmer
- Department of Pathology, National Veterinary School of Alfort, 7 avenue du Général de Gaulle, 94704 Maisons-Alfort Cedex, France.
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Allix S, Reyes-Gomez E, Aubin-Houzelstein G, Noël D, Tiret L, Panthier JJ, Bernex F. Uterine contractions depend on KIT-positive interstitial cells in the mouse: genetic and pharmacological evidence. Biol Reprod 2008; 79:510-7. [PMID: 18480468 DOI: 10.1095/biolreprod.107.066373] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
In the gastrointestinal tract, interstitial cells of Cajal (ICCs) generate a pacemaker activity. They produce electric slow waves that trigger and coordinate gut smooth muscle contractions. Interstitial cells of Cajal's slender shape is revealed by KIT immunostaining. Based on several features, including KIT expression and KIT dependence, ICC-like cells were identified in nongastrointestinal tissues. Here, we investigated in the mouse whether uterine contractions depend on ICC-like cells' activity. By labeling KIT-expressing cells, we found putative ICC-like cells in the uterus, observed as KIT-positive interstitial, long spindle-shaped cells with fine branched cytoplasm processes, distributed in muscular layers and in subepithelial connective tissue. We then checked the potential KIT dependence of ex vivo contractile activity of the uterus by combining genetic and pharmacological approaches, using the Kit W-v hypomorphic mutation, and imatinib as a KIT noncompetitive inhibitor. We found a significant reduction in frequency of longitudinal uterine contractions in Kit W-v/Kit W-v compared with Kit+/+ mice, whereas amplitude was unaffected. There was no difference in frequency or amplitude of circular uterine contractions between Kit W-v/Kit W-v and Kit+/+ mice. Ex vivo treatment of Kit+/+ uterine horns with imatinib resulted in a dose-dependent reduction of the frequency and amplitude of longitudinal myometrial contractions. Amplitude and frequency of circular contractions were unaffected in presence of imatinib. These concurrent results suggest that longitudinal contractions of the uterus depend on a KIT signaling pathway of ICC-like cells. The existence of ICC-like cells in the myometrium may enhance our understanding of uterine spontaneous contractile activity and suggest new approaches for treatment of uterine contractility disorders.
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Affiliation(s)
- Sébastien Allix
- Institut National de la Recherche Agronomique, UMR955 de Génétique Moléculaire et Cellulaire, Ecole Nationale Vétérinaire d'Alfort, 94704 Maisons-Alfort, France
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