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Mullen KM, Regier PJ, Perez-Rodriguez V, Fox-Alvarez WA, Bertran J, Colee J. Use of real-time near-infrared fluorescence to assess gastric viability in dogs with gastric dilatation volvulus: A case-control study. Vet Surg 2023. [PMID: 38135927 DOI: 10.1111/vsu.14067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 10/20/2023] [Accepted: 12/03/2023] [Indexed: 12/24/2023]
Abstract
OBJECTIVE To describe near-infrared fluorescence (NIRF) for assessment of gastric viability and describe NIRF's influence on the surgeon's operative strategy in dogs with gastric dilatation and volvulus (GDV). STUDY DESIGN Prospective clinical trial. ANIMALS Twenty dogs with GDV and 20 systemically healthy dogs. METHODS Following gastric derotation, the surgeon's subjective assessment of gastric viability was recorded prior to near-infrared imaging. Changes in the surgeon's initial assessment of viability based on the visual pattern of gastric fluorescence was recorded. If nonviable (lack of defined vessels), a partial gastrectomy was performed and submitted for histopathology. The stapled gastrectomy line was imaged. Viable (defined vessels) and nonviable fluorescence intensities were compared with healthy dogs undergoing surgery for nongastrointestinal disease. RESULTS Subjective assessment diagnosed 17 viable and three nonviable GDVs (2 fundi; 1 cardia). Near-infrared imaging demonstrated nonviable gastric fluorescence in 4 dogs (3 fundi/cardia; 1 fundus). The surgeon's margins for resection were altered in 3/20 dogs. Fluorescence intensity (cardia, fundus, body, pylorus) was lower in GDV viable (30.59%, p = .04; 38.17%, p < .01; 51.18%, p < .01; 44.12%, p= .01) and nonviable (11.00%, p < .01; 4.33%, p < .01; 57.67%, p = .22; 54.33%, p = .72) dogs compared to healthy controls (44.7%, 70.05%, 84.00%, 63.95%). Fundic fluorescence was less in nonviable gastric tissue in comparison with viable gastric tissue (p = .03). Fluorescence of the gastrectomy staple line approximated that of viable tissue. CONCLUSION Near-infrared fluorescence can identify histologically confirmed nonviable gastric tissue. CLINICAL SIGNIFICANCE These results provide enough evidence to support the implementation of NIRF as an adjunct to gross examination of the gastric wall in dogs with GDV.
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Affiliation(s)
- Kaitlyn M Mullen
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Penny J Regier
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Veronica Perez-Rodriguez
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | | | - Judith Bertran
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - James Colee
- IFAS Statistical Consulting, University of Florida, Gainesville, Florida, USA
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Stokes R, Wustefeld-Janssens BG, Hinson W, Wiener DJ, Hollenbeck D, Bertran J, Mickelson M, Chen CL, Selmic L, Aly A, Hayes G. Surgical and oncologic outcomes in dogs with malignant peripheral nerve sheath tumours arising from the brachial or lumbosacral plexus. Vet Comp Oncol 2023; 21:739-747. [PMID: 37727977 DOI: 10.1111/vco.12938] [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: 04/07/2023] [Revised: 08/12/2023] [Accepted: 09/07/2023] [Indexed: 09/21/2023]
Abstract
Malignant peripheral nerve sheath tumours (MPNST) of a plexus nerve or nerve root cause significant morbidity and present a treatment challenge. The surgical approach can be complex and information is lacking on outcomes. The objective of this study was to describe surgical complication rates and oncologic outcomes for canine MPNST of the brachial or lumbosacral plexus. Dogs treated for a naïve MPNST with amputation/hemipelvectomy with or without a laminectomy were retrospectively analysed. Oncologic outcomes were disease free interval (DFI), overall survival (OS), and 1- and 2-year survival rates. Thirty dogs were included. The surgery performed was amputation alone in 17 cases (57%), and amputation/hemipelvectomy with laminectomy in 13 cases (43%). Four dogs (13%) had an intraoperative complication, while 11 dogs (37%) had postoperative complications. Histologic margins were reported as R0 in 12 dogs (40%), R1 in 12 dogs (40%), and R2 in five dogs (17%). No association was found between histologic grade and margin nor extent of surgical approach and margin. Thirteen dogs (46%) had recurrence. The median DFI was 511 days (95% CI: 140-882 days). The median disease specific OST was 570 days (95% CI: 467-673 days) with 1- and 2-year survival rates of 82% and 22% respectively. No variables were significantly associated with recurrence, DFI, or disease specific OST. These data show surgical treatment of plexus MPNST was associated with a high intra- and postoperative complication rate but relatively good disease outcomes. This information can guide clinicians in surgical risk management and owner communication regarding realistic outcomes and complications.
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Affiliation(s)
- Rebecca Stokes
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Iowa State University, Ames, Iowa, USA
| | - Brandan G Wustefeld-Janssens
- Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA
| | - Whitney Hinson
- Department of Small Animal Medicine and Surgery, College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA
| | - Dominique J Wiener
- Department of Veterinary Pathobiology, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, USA
| | - Danielle Hollenbeck
- Department of Small Animal Clinical Sciences, School of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas, USA
| | - Judith Bertran
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida, USA
| | - Megan Mickelson
- Veterinary Health Center, College of Veterinary Medicine, University of Missouri, Columbia, Missouri, USA
| | - Carolyn L Chen
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Laura Selmic
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Ali Aly
- Departmet of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York, USA
| | - Galina Hayes
- Departmet of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York, USA
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Worden NJ, Bertran J, Reynolds PS, Chase EC, Crews CD, Ham K, de Mello Souza CH, Regier PJ, Adin CA, Maxwell EA. Geometric, landmark-guided technique reduces tissue trauma, surgery time, and subjective difficulty for canine peripheral lymphadenectomies: an educational crossover study. J Am Vet Med Assoc 2023; 261:1-9. [PMID: 37524352 DOI: 10.2460/javma.23.04.0206] [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: 04/26/2023] [Accepted: 07/05/2023] [Indexed: 08/02/2023]
Abstract
OBJECTIVE To compare the effect of a geometric, landmark-guided lymphadenectomy (LL) approach to peripheral lymph nodes (LNs) on successful LN identification, surgical time, tissue trauma, and ease of LN identification compared to standard lymphadenectomy (SL) and methylene blue-guided lymphadenectomy (MBL). SAMPLE 18 adult, mixed-breed canine cadavers operated on by 7 veterinarians and 5 fourth-year veterinary students between July 23 and October 12, 2022. METHODS Participants were provided standardized, publicly available materials regarding the anatomy and surgical techniques for SL of 3 peripheral lymphocentrums: superficial cervical, axillary (ALN), and superficial inguinal (SILN). Participants performed the 3 SLs unilaterally on canine cadavers. Thereafter, they were randomly assigned to 2 crossover groups: MBL and LL. All dissections were separated by at least 2 weeks for each participant. Primary outcome measures included successful LN identification, surgical time, tissue trauma scores, and subjective difficulty. RESULTS Successful LN identification was highest with LL (86%) compared to SL (69%) and MBL (67%). Subjective difficulty scores were reduced with LL for SILN dissections. Tissue trauma scores were reduced when using LL for ALN and SILN compared to MBL and SL. Time to LN identification was reduced for ALN with LL. No significant differences were observed between MBL and SL, or for the superficial cervical dissections. CLINICAL RELEVANCE Peripheral lymphadenectomies are time consuming and difficult for veterinarians in early stages of surgical training. Little surgical guidance is provided within current literature. Geometric, landmark-guided lymphadenectomies may improve LN identification success and reduce surgical time, tissue trauma, and procedure difficulty, which could encourage their clinical application.
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Affiliation(s)
- Natalie J Worden
- 1Department of Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
| | - Judith Bertran
- 1Department of Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
| | - Penny S Reynolds
- 1Department of Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
- 2Department of Anesthesiology, College of Medicine, University of Florida, Gainesville, FL
| | - Ellis C Chase
- 1Department of Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
| | - Chiquitha D Crews
- 1Department of Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
| | - Kathleen Ham
- 1Department of Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
| | - Carlos H de Mello Souza
- 1Department of Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
| | - Penny J Regier
- 1Department of Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
| | - Christopher A Adin
- 1Department of Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
| | - Elizabeth A Maxwell
- 1Department of Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
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Blumenthal M, Bertran J, Regier P, Cole J, Maxwell EA. Evaluation of automated staple sizes on gastric layer incorporation and intraluminal pressure for partial gastrectomy closure in an ex vivo canine model. Vet Med Sci 2023; 9:2586-2593. [PMID: 37817443 PMCID: PMC10650250 DOI: 10.1002/vms3.1294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 08/24/2023] [Accepted: 09/22/2023] [Indexed: 10/12/2023] Open
Abstract
OBJECTIVE To evaluate the performance of automated staple sizes on a cadaveric canine partial gastrectomy model. METHODS Stomachs were transected through the gastric body axis and randomly allocated to two closure groups: Group B, thoracoabdominal (TA) stapler 3.5 mm staple cartridge (blue); Group G, TA stapler 4.8 mm staple cartridge (green). After construct completion, leak testing was performed for both groups and compared. Initial leakage pressure (ILP), maximal leakage pressure (MLP) and leakage location were recorded. Staple lines were evaluated by direct observation and fluoroscopy to assess sub-mucosal layer incorporation and staple conformation. Staple shape was classified as optimal or suboptimal. Significance was set at p less than 0.5. RESULTS Following gastrectomy, the mean double gastric wall thickness was 7.82 ± 2.05 mm at the gastric body. Mean ILP was significantly lower in groups G (17.13 ± 1.19 mmHg) compared to group B (50.46 ± 6.03 mmHg, p = 0.0013). Similarly, mean MLP was significantly lower in group G (21.41 ± 1.39 mmHg) compared to group B (64.61 ± 10.21 mmHg, p < 0.0001). Although group G had higher percentage of B-shaped staple formation compared to group B, this was not significant (group G; 92.38%, group B; 54.56%; p = 0.054). CONCLUSION The 3.5 mm TA staple cartridge (blue) achieved superior bursting pressures compared with the 4.8 mm TA staple cartridge (blue) for the closure of a canine partial gastrectomy model. Both staple sizes incorporated all gastric layers. No differences were noticed in optimal staple conformation between groups. In vivo investigation is warranted to evaluate the use of different staple sizes on gastric tissue perfusion, successful healing and post-operative stasis and dehiscence.
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Affiliation(s)
- Michael Blumenthal
- Small Animal Clinical Sciences DepartmentUniversity of FloridaGainesvilleFloridaUSA
| | - Judith Bertran
- Small Animal Clinical Sciences DepartmentUniversity of FloridaGainesvilleFloridaUSA
| | - Penny Regier
- Small Animal Clinical Sciences DepartmentUniversity of FloridaGainesvilleFloridaUSA
| | - James Cole
- Small Animal Clinical Sciences DepartmentUniversity of FloridaGainesvilleFloridaUSA
| | - Elizabeth A Maxwell
- Small Animal Clinical Sciences DepartmentUniversity of FloridaGainesvilleFloridaUSA
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Rivenburg RE, Maxwell EA, Bertran J, Souza CHDM, Smith BL. Biomechanical comparison of canine median sternotomy closure using suture tape and orthopedic wire cerclage. Vet Surg 2023; 52:1057-1063. [PMID: 37603027 DOI: 10.1111/vsu.14015] [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: 05/13/2022] [Revised: 06/07/2023] [Accepted: 07/25/2023] [Indexed: 08/22/2023]
Abstract
OBJECTIVE To compare the mechanical properties of suture tape and orthopedic wire cerclage in an ex vivo canine median sternotomy model. STUDY DESIGN Ex vivo. ANIMALS Twelve large-breed canine cadaveric sternums. METHODS Median sternotomies were performed, leaving the manubrium intact. The specimens were randomly assigned to group W (20-gauge stainless steel orthopedic wire cerclage in a figure-of-eight pattern) or group ST (suture tape in a figure-of-eight pattern). Each specimen was laterally distracted until failure using an electrodynamic materials-testing system. RESULTS No differences were observed for displacement, yield load, maximum load, implant failure between the groups. The orthopedic wire construct was stiffer than the suture tape construct. CONCLUSION Suture tape was biomechanically similar to orthopedic wire cerclage for sternotomy closure in dogs, although wire constructs were stiffer. CLINICAL SIGNIFICANCE Suture tape may represent an alternative to cerclage wire for sternotomy closure in dogs. Additional studies evaluating its clinical use are needed.
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Affiliation(s)
- Rachel E Rivenburg
- Department of Small Animal Clinical Sciences, University of Florida College of Veterinary Medicine, Gainesville, Florida, USA
| | - Elizabeth A Maxwell
- Department of Small Animal Clinical Sciences, University of Florida College of Veterinary Medicine, Gainesville, Florida, USA
| | - Judith Bertran
- Department of Small Animal Clinical Sciences, University of Florida College of Veterinary Medicine, Gainesville, Florida, USA
| | - Carlos H De Mello Souza
- Department of Small Animal Clinical Sciences, University of Florida College of Veterinary Medicine, Gainesville, Florida, USA
| | - Benjamin L Smith
- Arthrex Inc., Department of Orthopedic Research, Naples, Florida, USA
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Naghi R, Maxwell EA, Carrillo AJ, Bertran J, Souza CHDM. Acellular fish skin may be used to facilitate wound healing following wide surgical tumor excision in dogs: a prospective case series. J Am Vet Med Assoc 2023; 261:1547-1554. [PMID: 37315939 DOI: 10.2460/javma.23.03.0157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Accepted: 05/16/2023] [Indexed: 06/16/2023]
Abstract
OBJECTIVE To prospectively evaluate clinical outcomes using acellular fish skin grafts (FSGs) for the management of complete wound healing by secondary intention after wide surgical excision of skin tumors in dogs. ANIMALS 5 dogs undergoing wide surgical excision of skin tumors on the distal extremity. CLINICAL PRESENTATION AND PROCEDURES FSGs were applied to surgical wound beds following wide excision of the tumor. Bandages were changed weekly and additional grafts placed when integration of the previous graft was complete. The wounds were assessed for the following: dimensions, tissue health (color), time to complete epithelialization, complications, and tumor recurrence. RESULTS All masses were excised with 2-cm lateral margins and 1 fascial plane deep to the tumor. Tumor diagnoses included 3 mast cell tumors and 2 soft tissue sarcomas. Surgical wounds had a median area of 27.6 cm2 (range, 17.6 to 58.7 cm2). The median number of FSG applications was 5 (range, 4 to 9 applications). Complete epithelialization occurred within 7 to 9 weeks for uncomplicated wounds (3 of 5) and 12 to 15 weeks for complicated wounds (2 of 5) that sustained self-trauma. There were no adverse events related to the use of FSGs. Local recurrence was not seen over a follow-up period ranging from 239 to 856 days. CLINICAL RELEVANCE Wide surgical excision of distal extremity skin tumors, followed by repeated application of acellular FSGs, resulted in complete healing of all wounds with no adverse events. This treatment method does not require advanced reconstructive surgical skills and may be useful for the management of skin tumors on the distal extremities.
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Naghi R, Bertran J, Spoldi E, Dark MJ, de Oliveira HH, Souza C, Maxwell EA. Multiple biliary duct hamartomas in a cat resulting in a hepatic mass: A case report. Vet Med Sci 2023. [PMID: 37386741 DOI: 10.1002/vms3.1175] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 05/01/2023] [Accepted: 05/25/2023] [Indexed: 07/01/2023] Open
Abstract
A 13-year-old, male neutered domestic short-haired cat was diagnosed with multiple biliary duct hamartomas after liver lobectomy for a suspected malignant hepatic mass. Distinguishing ultrasonographic findings included a lobular, mostly well-defined, heterogeneous, predominantly hyperechoic, left hepatic mass. Computed tomography (CT) confirmed the presence of a lobular, well-defined, fluid to soft tissue attenuating, heterogeneously hypoenhancing left divisional hepatic mass. Grossly, a large left sided multilobular pale pink gelatinous hepatic mass was surgically excised. Histopathologically, the mass was composed of irregular cystic spaces lined by cuboidal epithelium and separated by mature regular fibrous tissue. Three months following surgery there was no evidence of recurrence or progression of disease on repeat abdominal ultrasound (AUS).
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Affiliation(s)
- Rachel Naghi
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida
| | - Judith Bertran
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida
| | - Elisa Spoldi
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida
| | - Michael J Dark
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida
| | - Helena Hauck de Oliveira
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida
| | - Carlos Souza
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida
| | - Elizabeth A Maxwell
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida
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Worden NJ, Bertran J, Watt MM, Reynolds PS, de Mello Souza CH, Maxwell EA, Adin CA, Ham K, Regier PJ. Superficial anatomic landmarks can be used to triangulate the location of canine peripheral lymphocentrums: superficial cervical, axillary, and superficial inguinal. J Am Vet Med Assoc 2023; 261:490-499. [PMID: 36701220 DOI: 10.2460/javma.22.11.0518] [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] [Received: 11/21/2022] [Accepted: 01/01/2023] [Indexed: 01/26/2023]
Abstract
OBJECTIVE To utilize the geometry of superficial anatomic landmarks to guide incisional location and orientation for peripheral lymphadenectomy, document deep anatomic landmarks for lymphocentrum identification, and develop novel surgical approaches to the superficial cervical, axillary, and superficial inguinal lymphocentrums in dogs. ANIMALS 12 canine cadavers. PROCEDURES 2 cadavers were used for a pilot investigation to determine optimal body positioning, select superficial anatomic landmarks for lymphocentrum identification, and evaluate novel surgical approaches to the 3 lymphocentrums. These lymphocentrums were then dissected in 10 additional cadavers using these novel surgical approaches. Measurements of the distances from lymphocentrum to landmark and between landmarks were obtained for each lymphocentrum. Deep anatomic landmarks were recorded for each dissection. The mean and SD were calculated for each measurement and used to develop geometric guidelines for estimating the location of each lymphocentrum for these surgical approaches. RESULTS Each peripheral lymphocentrum was found in the same location relative to the respective, predetermined, superficial, anatomic boundaries in all cadavers. Briefly, the superficial landmarks to each lymphocentrum were as follows: (1) superficial cervical: wing of atlas, acromion process of scapula, greater tubercle of humerus; (2) axillary: caudal border of transverse head of superficial pectoral muscle, caudal triceps muscle, ventral midline; and (3) superficial inguinal: origin of pectineus muscle, ipsilateral inguinal mammary gland, ventral midline. The proposed superficial and deep surgical landmarks were identified within every cadaver. The previously undescribed surgical approaches were effective for lymphocentrum identification. CLINICAL RELEVANCE Anatomic landmarks provided in this study may help reduce surgical time and tissue trauma during peripheral lymphadenectomy in dogs. This study was also the first to describe a surgical approach to the superficial inguinal lymphocentrum and ventral approaches to the superficial cervical and axillary lymphocentrums and provided previously unpublished anatomic landmarks for a lateral approach to the superficial cervical lymphocentrum.
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Affiliation(s)
- Natalie J Worden
- 1Department of Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
| | - Judith Bertran
- 1Department of Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
| | - Meghan M Watt
- 1Department of Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
| | - Penny S Reynolds
- 2Department of Anesthesiology, College of Medicine, University of Florida, Gainesville, FL
| | - Carlos H de Mello Souza
- 1Department of Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
| | - Elizabeth A Maxwell
- 1Department of Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
| | - Christopher A Adin
- 1Department of Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
| | - Kathleen Ham
- 1Department of Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
| | - Penny J Regier
- 1Department of Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
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Gibbons E, Robillard S, Bertran J, Dark MJ, Lanier CJ, Menoyo AG, Bechtel S, Vilaplana Grosso FR. Chronic intermittent dyschezia in a 10-year-old spayed female domestic shorthair cat. J Am Vet Med Assoc 2023; 261:1-4. [PMID: 36626289 DOI: 10.2460/javma.22.11.0502] [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: 01/11/2023]
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McGrath AM, Cook MR, Culp WT, Oblak ML, Oramas A, Bertran J, Tremolada G, Lapsley J, Selmic LE. Hemangiosarcoma of the nasal planum in cats: five cases (2010-2021). J Feline Med Surg 2022; 24:e661-e666. [PMID: 36350308 DOI: 10.1177/1098612x221123772] [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: 11/11/2022]
Abstract
CASE SERIES SUMMARY Nasal planum tumors are rare in cats, with squamous cell carcinoma over-represented. Other skin tumors have been reported in this location and though hemangiosarcoma frequently occurs on the skin of the head, these tumors localized to the nasal planum have not been specifically reported. The objectives of this study were to report the clinical findings and outcomes in cats diagnosed with hemangiosarcoma of the nasal planum. Medical records from four different institutions were reviewed to identify cats with a definitive diagnosis of hemangiosarcoma of the nasal planum. Five cats met the inclusion criteria. One cat was treated with palliative radiation therapy (RT) alone, two cats had lesions removed via an excisional biopsy by the primary care veterinarian and two cats had excisional biopsies performed at a referral institution. All four cats that received surgical treatment were treated with adjuvant strontium-90 therapy. The cat receiving palliative RT alone was lost to follow-up 311 days after treatment. At the time of writing, the survival time for 2/3 cats receiving surgery and strontium-90 was 365 days and 1381 days, respectively. One cat receiving this combination of therapy was lost to follow-up immediately after treatment. One cat developed tumor recurrence and a revision surgery via nasal planectomy and upper lip resection was performed 376 days following the initial surgery. Following revision, palliative RT was pursued. The cat was still alive at the time of writing 618 days after the initial procedure, with no evidence of recurrence. RELEVANCE AND NOVEL INFORMATION In this case series, surgery was the primary treatment used, but due to the location, only narrow or incomplete surgical margins were possible. RT (strontium-90 and/or palliative) was utilized to decrease the risk of recurrence.
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Affiliation(s)
- Alysha M McGrath
- Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH, USA
| | - Matthew R Cook
- Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH, USA
| | - William Tn Culp
- Department of Surgical and Radiological Sciences, University of California-Davis, Davis, CA, USA
| | - Michelle L Oblak
- Department of Clinical Studies, Ontario Veterinary College, Guelph, ON, Canada
| | - Alberto Oramas
- Department of Small Animal Clinical Sciences, University of Florida, Gainesville, FL, USA
| | - Judith Bertran
- Department of Small Animal Clinical Sciences, University of Florida, Gainesville, FL, USA
| | - Giovanni Tremolada
- Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH, USA
| | - Janis Lapsley
- Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH, USA
| | - Laura E Selmic
- Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH, USA
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Huerta Y, De Mello Souza CH, Selmic LE, McGrath A, Skinner OT, Dark KV, Traverson M, Snell WL, Maxwell EA, Bertran J, Hasiuk MMM. Complications associated with iliosacral lymphadenectomy in dogs with metastatic apocrine gland anal sac adenocarcinoma. Can Vet J 2022; 63:929-934. [PMID: 36060485 PMCID: PMC9377189] [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: 06/15/2023]
Abstract
OBJECTIVE To report intraoperative and immediate postoperative complications associated with removal of metastatic iliosacral lymph nodes in dogs with apocrine gland anal sac adenocarcinoma. ANIMALS There were 136 client-owned dogs in the study. PROCEDURE Retrospective multi-institutional study. The database of collaborating institutions was searched for dogs with metastatic apocrine gland anal sac adenocarcinoma that underwent lymphadenectomy for removal of one or more iliosacral lymph nodes. Information of signalment, hematological abnormalities, abdominal computed tomography or ultrasound findings, number and size of enlarged lymph nodes, intraoperative and postoperative complications, treatment and outcome were collected. RESULTS The overall complication rate associated with metastatic iliosacral lymphadenectomy was 26.1%. The only intraoperative complication recorded was hemorrhage and was reported in 24 (17.6%) surgeries, 11 (45.8%) of which received a blood transfusion. Postoperative complications were reported in 10.4% of surgeries, and included edema formation (n = 4, 2.6%), unilateral or bilateral paraparesis (n = 4, 2.6%), hypotension (n = 3, 2.0%), surgical site infection (n = 2, 1.3%), abdominal incision dehiscence (n = 1, 0.6%), urinary incontinence (n = 1, 0.6%), and death (n = 1, 0.6%). The size of the iliosacral lymph nodes was significantly associated with a greater risk of complications, hemorrhage, and the need of transfusion during lymphadenectomy for metastatic apocrine gland anal sac adenocarcinoma. CONCLUSION Complications associated with iliosacral lymphadenectomy for metastatic apocrine gland anal sac adenocarcinoma are relatively common and mostly relate to hemorrhage. These complications are significantly associated with the size of the extirpated metastatic lymph nodes. CLINICAL RELEVANCE This retrospective study provides information for the clinician regarding the potential surgical complications for extirpation of metastatic iliosacral lymph nodes. These complications, although not common, can be severe and should be discussed with owners before surgery.
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Affiliation(s)
- Yael Huerta
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida 32611, USA (Huerta, De Mello Souza, Maxwell, Bertran, Hasiuk); Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio 43210, USA (Selmic, McGrath); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri 65211, USA (Skinner, Dark); Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina 27695, USA (Traverson); BluePearl Pet Hospital Charlestown, Boston, Massachusetts 02129, USA (Snell)
| | - Carlos H De Mello Souza
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida 32611, USA (Huerta, De Mello Souza, Maxwell, Bertran, Hasiuk); Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio 43210, USA (Selmic, McGrath); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri 65211, USA (Skinner, Dark); Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina 27695, USA (Traverson); BluePearl Pet Hospital Charlestown, Boston, Massachusetts 02129, USA (Snell)
| | - Laura E Selmic
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida 32611, USA (Huerta, De Mello Souza, Maxwell, Bertran, Hasiuk); Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio 43210, USA (Selmic, McGrath); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri 65211, USA (Skinner, Dark); Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina 27695, USA (Traverson); BluePearl Pet Hospital Charlestown, Boston, Massachusetts 02129, USA (Snell)
| | - Alysha McGrath
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida 32611, USA (Huerta, De Mello Souza, Maxwell, Bertran, Hasiuk); Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio 43210, USA (Selmic, McGrath); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri 65211, USA (Skinner, Dark); Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina 27695, USA (Traverson); BluePearl Pet Hospital Charlestown, Boston, Massachusetts 02129, USA (Snell)
| | - Owen T Skinner
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida 32611, USA (Huerta, De Mello Souza, Maxwell, Bertran, Hasiuk); Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio 43210, USA (Selmic, McGrath); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri 65211, USA (Skinner, Dark); Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina 27695, USA (Traverson); BluePearl Pet Hospital Charlestown, Boston, Massachusetts 02129, USA (Snell)
| | - Katelin V Dark
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida 32611, USA (Huerta, De Mello Souza, Maxwell, Bertran, Hasiuk); Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio 43210, USA (Selmic, McGrath); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri 65211, USA (Skinner, Dark); Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina 27695, USA (Traverson); BluePearl Pet Hospital Charlestown, Boston, Massachusetts 02129, USA (Snell)
| | - Marine Traverson
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida 32611, USA (Huerta, De Mello Souza, Maxwell, Bertran, Hasiuk); Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio 43210, USA (Selmic, McGrath); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri 65211, USA (Skinner, Dark); Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina 27695, USA (Traverson); BluePearl Pet Hospital Charlestown, Boston, Massachusetts 02129, USA (Snell)
| | - William L Snell
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida 32611, USA (Huerta, De Mello Souza, Maxwell, Bertran, Hasiuk); Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio 43210, USA (Selmic, McGrath); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri 65211, USA (Skinner, Dark); Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina 27695, USA (Traverson); BluePearl Pet Hospital Charlestown, Boston, Massachusetts 02129, USA (Snell)
| | - Elizabeth A Maxwell
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida 32611, USA (Huerta, De Mello Souza, Maxwell, Bertran, Hasiuk); Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio 43210, USA (Selmic, McGrath); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri 65211, USA (Skinner, Dark); Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina 27695, USA (Traverson); BluePearl Pet Hospital Charlestown, Boston, Massachusetts 02129, USA (Snell)
| | - Judith Bertran
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida 32611, USA (Huerta, De Mello Souza, Maxwell, Bertran, Hasiuk); Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio 43210, USA (Selmic, McGrath); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri 65211, USA (Skinner, Dark); Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina 27695, USA (Traverson); BluePearl Pet Hospital Charlestown, Boston, Massachusetts 02129, USA (Snell)
| | - Michelle M M Hasiuk
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, Florida 32611, USA (Huerta, De Mello Souza, Maxwell, Bertran, Hasiuk); Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio 43210, USA (Selmic, McGrath); Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Missouri, Columbia, Missouri 65211, USA (Skinner, Dark); Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina 27695, USA (Traverson); BluePearl Pet Hospital Charlestown, Boston, Massachusetts 02129, USA (Snell)
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12
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Lopez WA, Ayers JC, Bertran J, Fox-Alvarez SA, Vilaplana Grosso FR. What Is Your Diagnosis? J Am Vet Med Assoc 2022; 261:1-3. [PMID: 35976984 DOI: 10.2460/javma.22.06.0260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Wilmer A. Lopez
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
| | - Jordan C. Ayers
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
| | - Judith Bertran
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
| | - Stacey A. Fox-Alvarez
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
| | - Federico R. Vilaplana Grosso
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL
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13
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Lapsley JM, Wavreille V, Barry S, Dornbusch JA, Chen C, Leeper H, Bertran J, Scavelli D, Liptak JM, Wood C, Shamir S, Rosenbaum C, Montinaro V, Wustefeld-Janssens B, Sterman A, Chik C, Singh A, Collins J, Selmic LE. Risk factors and outcome in dogs with recurrent massive hepatocellular carcinoma: a Veterinary Society of Surgical Oncology case-control study. Vet Comp Oncol 2022; 20:697-709. [PMID: 35488436 PMCID: PMC9546275 DOI: 10.1111/vco.12824] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 04/25/2022] [Accepted: 04/25/2022] [Indexed: 11/28/2022]
Abstract
Local recurrence after surgical excision of canine massive hepatocellular carcinoma (HCC) has been poorly studied in veterinary medicine with scant information published regarding risk factors for and outcome following recurrence. The aim of this case-control study was to describe the time to recurrence, evaluate potential risk factors for recurrence, and report the outcome in dogs with massive HCC. Medical records for 75 dogs who developed recurrence and 113 dogs who did not develop recurrence were reviewed. Statistical analyses were performed to determine risk factors for recurrence as well as the median time to develop recurrence and overall survival time (OS). None of the risk factors evaluated were significant for the development of recurrence. The median time to develop recurrence was 367 days (range: 32-2096 days). There was no significant difference in median OS for dogs who developed recurrence vs. those who did not (851 vs. 970 days). For dogs with recurrent HCC, treatment at recurrence trended toward prolonged OS but was not significantly different from dogs not undergoing treatment at recurrence. There was no significant difference in median OS for dogs with histologically complete vs. incomplete tumor excision (990 vs. 903 days). Though specific risk factors for recurrence were not identified, elevations in liver values were noted in patients with recurrent disease and could act as a noninvasive surveillance tool. Recurrence was noted earlier in dogs who had routine post-operative surveillance (228 vs. 367 days). Routine surveillance for recurrence is recommended especially in dogs where further intervention is possible and should extend beyond 1 year. Patients with massive HCC have a good long-term prognosis regardless of incomplete excision, pulmonary metastasis, or recurrent local disease. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Janis M Lapsley
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Vincent Wavreille
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH.,VetSpecialistes SA, Grand-Saconnex, Switzerland
| | - Sabrina Barry
- Virginia-Maryland College of Veterinary Medicine, Virginia Tech, Blacksburg, VA
| | - Josephine A Dornbusch
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
| | - Carolyn Chen
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH.,Department of Small Animal Medicine and Surgery, College of Veterinary Medicine, University of Georgia, Athens, GA
| | - Haley Leeper
- Department of Clinical Sciences, Carlson College of Veterinary Medicine, Oregon State University, Corvallis, OR
| | - Judith Bertran
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, The University of Florida, Gainesville, FL
| | - Diane Scavelli
- Department of Clinical Sciences and Advanced Medicine, Matthew J. Ryan Veterinary Hospital, University of Pennsylvania, Philadelphia, PA.,Flint Animal Cancer Center and Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado
| | - Julius M Liptak
- Capital City Small Animal Mobile Surgery, Ottawa, ON, Canada.,Alta Vista Animal Hospital, Gloucester, ON, Canada
| | - Chris Wood
- Alta Vista Animal Hospital, Gloucester, ON, Canada
| | - Shelly Shamir
- Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Minnesota, Twin Cities, MN
| | - Claire Rosenbaum
- Department of Veterinary Medicine and Surgery, College of Veterinary Medicine, University of Minnesota, Twin Cities, MN
| | - Vincenzo Montinaro
- Soft Tissue Surgery Department, Clinica Veterinaria Malpensa-AniCura, Samarate (Va), Italy
| | - Brandan Wustefeld-Janssens
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas.,Flint Animal Cancer Center and Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado
| | - Allyson Sterman
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, Texas.,Department of Veterinary Clinical Sciences, Purdue University College of Veterinary Medicine, West Lafayette, IN
| | - Colin Chik
- College of Veterinary Medicine, Cornell University, Ithaca, NY
| | - Ameet Singh
- Department of Clinical Studies, Ontario Veterinary College, University of Guelph, Guelph, ON, Canada
| | - Josh Collins
- Surgery Department, Metropolitan Veterinary Hospital, Copley, OH
| | - Laura E Selmic
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, Columbus, OH
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14
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Bertran J, Thomson AC. Current Concepts in Head and Neck Surgery. Vet Clin North Am Small Anim Pract 2022; 52:489-512. [DOI: 10.1016/j.cvsm.2021.12.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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15
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Locker SH, Maxwell EA, Vilaplana Grosso F, Bertran J, Shiomitsu K. Novel treatment of recurrent abdominal lymphatic malformations in a dog. Vet Record Case Reports 2021. [DOI: 10.1002/vrc2.127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Seth H Locker
- Department of Small Animal Clinical Sciences College of Veterinary Medicine University of Florida Gainesville Florida USA
| | - Elizabeth A Maxwell
- Department of Small Animal Clinical Sciences College of Veterinary Medicine University of Florida Gainesville Florida USA
| | - Federico Vilaplana Grosso
- Department of Small Animal Clinical Sciences College of Veterinary Medicine University of Florida Gainesville Florida USA
| | - Judith Bertran
- Department of Small Animal Clinical Sciences College of Veterinary Medicine University of Florida Gainesville Florida USA
| | - Keijiro Shiomitsu
- Department of Small Animal Clinical Sciences College of Veterinary Medicine University of Florida Gainesville Florida USA
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16
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Bertran J, Ham KM, Gibson JF, Litsky A, Kieves NR. Penile urethral resection and anastomosis augmentation with regional tissue tension relieving technique: A cadaveric mechanical study and clinical outcome in two dogs. Vet Surg 2021; 50:888-897. [PMID: 33760239 DOI: 10.1111/vsu.13614] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 01/20/2021] [Accepted: 02/15/2021] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To describe penile urethral augmentation anastomosis (PURAA) for resection anastomosis (RA) of the canine penile urethra by using autogenous tissue in two dogs and to determine the mechanical properties of the augmentation technique in cadaveric specimens. STUDY DESIGN Cadaveric study and two case reports. ANIMALS Sixteen canine cadavers and two dogs with urethral obstruction. METHODS The lower urogenital system was harvested from cadavers and randomized into two groups: simple (S) and augmented (AUG) RA of the urethra. Tensile strength and peak load were compared between the two groups. Two dogs were treated with PURAA for urethral obstruction secondary to juxtaurethral neoplasms. RESULTS Minimal tensile strength (MITS) and maximal tensile strength (MATS) were greater in the AUG group (MITS, 54.36 ± 24.0 N; MATS, 75.37 ± 34.79 N) compared with the S group (MITS, 11.78 ± 4.93 N, P = .0014; MATS, 13.74 ± 3.89 N, P = .0015). Both dogs recovered without complications. Histopathological examinations were consistent with a lipomatous mass in both cases. Both dogs had good medium-to-long-term outcomes. CONCLUSION The augmentation technique improved the tensile properties of penile RA in normal cadavers and was associated with successful outcomes in two dogs. CLINICAL SIGNIFICANCE Penile urethral augmentation anastomosis may help prevent stricture or leakage secondary to tension at the surgical site after penile urethral RA.
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17
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Thomson ACS, Gatson BJ, Bertran J. Anesthesia Case of the Month. J Am Vet Med Assoc 2021; 257:710-713. [PMID: 32955390 DOI: 10.2460/javma.257.7.710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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18
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Redondo A, Wood D, Amaral S, Ferré J, Goti D, Bertran J. Production of Toxoplasma gondii Recombinant Antigens in Genome-Edited Escherichia coli. APPL BIOCHEM MICRO+ 2021. [DOI: 10.1134/s0003683821020137] [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: 11/23/2022]
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19
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Watt MM, Regier PJ, Ferrigno CRA, McConkey MJ, Fox-Alvarez WA, Bertran J. Otoscopic evaluation of epithelial remnants in the tympanic cavity after total ear canal ablation and lateral bulla osteotomy. Vet Surg 2020; 49:1406-1411. [PMID: 32716063 DOI: 10.1111/vsu.13492] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 06/09/2020] [Accepted: 06/18/2020] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To determine the ability to detect the presence of epithelial remnants after total ear canal ablation (TECA) and lateral bulla osteotomy (LBO) with endoscopy and to identify the most common locations of epithelial remnants after tympanic curettage. STUDY DESIGN Experimental study. ANIMALS Five fresh canine cadavers with no gross evidence of middle ear disease. METHODS Ten TECA-LBO were performed by four surgeons. After tympanic curettage, a 1.9-mm rigid 30° endoscope was inserted into the rostral, caudal, dorsal, ventral, and medial sections of the tympanic cavity. Three observers evaluated otoscopic images for epithelial remnants in each compartment. The median distribution of epithelial remnants was calculated for each section of the tympanic cavity with a three-dimensional tympanic cavity model. RESULTS Epithelial remnants were identified in at least one of the five areas of the tympanic cavity after each TECA-LBO. The rostral section contained the most epithelial remnants (35.6%), while the medial section contained the least amount (1.8%). CONCLUSION Use of a 1.9-mm rigid endoscope was an effective method to evaluate all sections of the tympanic cavity after curettage in TECA-LBO. Epithelial remnants were consistently found after TECA-LBO, especially in the rostral compartment. CLINICAL SIGNIFICANCE Intraoperative endoscopy should be considered to improve removal of epithelium after initial TECA-LBO or revision surgeries.
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Affiliation(s)
- Meghan M Watt
- Department of Small Animal Clinical Sciences, University of Florida College of Veterinary Medicine, Gainesville, Florida
| | - Penny J Regier
- Department of Small Animal Clinical Sciences, University of Florida College of Veterinary Medicine, Gainesville, Florida
| | - Cassio R A Ferrigno
- Department of Small Animal Clinical Sciences, University of Florida College of Veterinary Medicine, Gainesville, Florida
| | - Marina J McConkey
- Department of Small Animal Clinical Sciences, University of Florida College of Veterinary Medicine, Gainesville, Florida
| | - W Alexander Fox-Alvarez
- Department of Small Animal Clinical Sciences, University of Florida College of Veterinary Medicine, Gainesville, Florida
| | - Judith Bertran
- Department of Small Animal Clinical Sciences, University of Florida College of Veterinary Medicine, Gainesville, Florida
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20
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Jones SC, Howard J, Bertran J, Johnson B, Pozzi A, Litsky AS, Wittum TE, Kieves N. Measurement of Shoulder Abduction Angles in Dogs: An Ex Vivo Study of Accuracy and Repeatability. Vet Comp Orthop Traumatol 2019; 32:427-432. [PMID: 31226723 DOI: 10.1055/s-0039-1692410] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
OBJECTIVE The aim of this study was to determine the accuracy and repeatability of the shoulder abduction test and to assess the effect of transection of the medial shoulder support structures in canine cadavers. MATERIALS AND METHODS The shoulder abduction angle was measured by three separate observers, both with the shoulder extended and at a neutral angle. Shoulder abduction was then measured, using craniocaudal fluoroscopic images. Arthroscopy was performed in all shoulder joints, with the medial support structures transected in one shoulder of each dog. The three observers again measured shoulder abduction angles in all dogs. Shoulder abduction was measured again using fluoroscopy. Accuracy and repeatability of the abduction test were assessed using linear mixed models. RESULTS All three observers had different measured abduction angles when compared with fluoroscopy (p < 0.01); however, the experienced surgeon had an error of only 2.9°. Inter-observer repeatability was poor, with all three observers having different abduction measurements (p < 0.001). Intra-observer repeatability, however, indicated no differences on repeated measurements (p = 0.26). Placing the shoulder at a neutral standing angle, and transection of support structures caused an average increase in abduction by 8.2° (p < 0.001) and 4.4° respectively. CONCLUSION Significant variation exists between observers performing this test, increased accuracy seen in the more experienced observer. Shoulder flexion angle can significantly affect measured abduction angles.
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Affiliation(s)
- Stephen C Jones
- Department of Veterinary Clinical Sciences, The Ohio State University, College of Veterinary Medicine, Columbus, Ohio, United States
| | - James Howard
- Department of Veterinary Clinical Sciences, The Ohio State University, College of Veterinary Medicine, Columbus, Ohio, United States
| | - Judith Bertran
- Department of Veterinary Clinical Sciences, The Ohio State University, College of Veterinary Medicine, Columbus, Ohio, United States
| | - Brittney Johnson
- Department of Veterinary Clinical Sciences, The Ohio State University, College of Veterinary Medicine, Columbus, Ohio, United States
| | - Antonio Pozzi
- Department for Small Animals, Vetsuisse University of Zurich, Zurich, Switzerland
| | - Alan S Litsky
- Department of Biomedical Engineering, The Ohio State University, College of Engineering, Columbus, Ohio, United States.,Department of Orthopaedics, Ohio State University, College of Medicine, Columbus, Ohio, United States
| | - Thomas E Wittum
- Department of Veterinary Preventive Medicine, The Ohio State University, College of Veterinary Medicine, Columbus, Ohio, United States
| | - Nina Kieves
- Department of Veterinary Clinical Sciences, The Ohio State University, College of Veterinary Medicine, Columbus, Ohio, United States
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21
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Bertran J, Martinez M, Breit M, McLoughlin MA, Ham KL, Warry E, Wavreille V. Laryngeal chondronecrosis after radiation therapy in a dog. J Small Anim Pract 2017; 59:783-787. [PMID: 29194625 DOI: 10.1111/jsap.12783] [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] [Received: 02/29/2016] [Revised: 11/15/2016] [Accepted: 05/16/2017] [Indexed: 11/30/2022]
Abstract
A 5-year-old pug presented with a soft tissue swelling on the ventral neck and moderate stridor with associated respiratory effort. This patient received hypofractionated radiotherapy for metastatic upper lip mast cell tumour and to the submandibular lymph nodes 6 months before presentation. Oral examination showed moderate elongation of the soft palate, stage III laryngeal collapse with only the right laryngeal saccule mildly everted and exuberant pale epiglottal and left pharyngeal mucosa. Staphylectomy, resection of the epiglottal mucosa and left arytenoid lateralisation were performed. One day after surgery, temporary tracheostomy was performed after respiratory distress due to the severe laryngeal and pharyngeal oedema. A third oral exam showed pale and redundant caudal pharyngeal mucosa obstructing the rima glottis, soft and collapsible arytenoid cartilage with pale mucosa and bilateral everted laryngeal saccules. Permanent tracheostomy was elected and laryngeal cartilage biopsies were taken. Histologic diagnosis showed cartilage necrosis and abundant tissue oedema. The patient was euthanased 1 week later.
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Affiliation(s)
- J Bertran
- College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, 43210, USA
| | - M Martinez
- College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, 43210, USA
| | - M Breit
- College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, 43210, USA
| | - M A McLoughlin
- College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, 43210, USA
| | - K L Ham
- College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, 43210, USA
| | - E Warry
- College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, 43210, USA
| | - V Wavreille
- College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, 43210, USA
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22
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Alizadeh M, Knapik GG, Dufour JS, Zindl C, Allen MJ, Bertran J, Fitzpatrick N, Marras WS. An EMG-driven biomechanical model of the canine cervical spine. J Electromyogr Kinesiol 2017; 32:101-109. [PMID: 28092739 DOI: 10.1016/j.jelekin.2016.12.008] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Revised: 11/23/2016] [Accepted: 12/22/2016] [Indexed: 11/17/2022] Open
Abstract
Due to the frequency of cervical spine injuries in canines, the purpose of this effort was to develop an EMG-driven dynamic model of the canine cervical spine to assess a biomechanical understanding that enables one to investigate the risk of neck disorders. A canine subject was recruited in this investigation in order to collect subject specific data. Reflective markers and a motion capture system were used for kinematic measurement; surface electrodes were used to record electromyography signals, and with the aid of force plate kinetics were recorded. A 3D model of the canine subject was reconstructed from an MRI dataset. Muscles lines of action were defined through a new technique with the aid of 3D white light scanner. The model performed well with a 0.73 weighted R2 value in all three planes. The weighted average absolute error of the predicted moment was less than 10% of the external moment. The proposed model is a canine specific forward-dynamics model that precisely tracks the canine subject head and neck motion, calculates the muscle force generated from the twelve major moment producing muscles, and estimates resulting loads on specific spinal tissues.
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Affiliation(s)
- M Alizadeh
- Spine Research Institute, The Ohio State University, 520 Baker Systems, 1971 Neil Avenue., Columbus, OH 43210, USA.
| | - G G Knapik
- Spine Research Institute, The Ohio State University, 520 Baker Systems, 1971 Neil Avenue., Columbus, OH 43210, USA
| | - J S Dufour
- Spine Research Institute, The Ohio State University, 520 Baker Systems, 1971 Neil Avenue., Columbus, OH 43210, USA
| | - C Zindl
- Surgical Discovery Center, Department of Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge CB3 0ES, UK
| | - M J Allen
- Surgical Discovery Center, Department of Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge CB3 0ES, UK; Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH 43210, USA
| | - J Bertran
- Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH 43210, USA
| | | | - W S Marras
- Spine Research Institute, The Ohio State University, 520 Baker Systems, 1971 Neil Avenue., Columbus, OH 43210, USA
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23
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Fitzpatrick N, Garcia TC, Daryani A, Bertran J, Watari S, Hayashi K. Micro-CT Structural Analysis of the Canine Medial Coronoid Disease. Vet Surg 2016; 45:336-46. [DOI: 10.1111/vsu.12449] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Tanya C. Garcia
- JD Wheat Veterinary Orthopedic Research Laboratory; University of California, Davis; Davis California
| | - Anjolie Daryani
- JD Wheat Veterinary Orthopedic Research Laboratory; University of California, Davis; Davis California
| | - Judith Bertran
- Department of Veterinary Clinical Sciences; The Ohio State University Veterinary Medical Center; Columbus Ohio
| | - Shinya Watari
- JD Wheat Veterinary Orthopedic Research Laboratory; University of California, Davis; Davis California
| | - Kei Hayashi
- Department of Clinical Sciences; Cornell University College of Veterinary Medicine; Ithaca New York
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Peters KM, Hutter E, Siston RA, Bertran J, Allen MJ. Surgical Navigation Improves the Precision and Accuracy of Tibial Component Alignment in Canine Total Knee Replacement. Vet Surg 2016; 45:52-9. [DOI: 10.1111/vsu.12429] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Erin Hutter
- Department of Mechanical and Aerospace Engineering; The Ohio State University; Columbus Ohio
| | - Robert A. Siston
- Department of Mechanical and Aerospace Engineering; The Ohio State University; Columbus Ohio
| | | | - Matthew J. Allen
- Department of Veterinary Clinical Sciences
- Department of Veterinary Medicine; University of Cambridge; Cambridge UK
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Świderek K, Tuñón I, Moliner V, Bertran J. Computational strategies for the design of new enzymatic functions. Arch Biochem Biophys 2015; 582:68-79. [PMID: 25797438 PMCID: PMC4554825 DOI: 10.1016/j.abb.2015.03.013] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Revised: 03/09/2015] [Accepted: 03/13/2015] [Indexed: 11/28/2022]
Abstract
In this contribution, recent developments in the design of biocatalysts are reviewed with particular emphasis in the de novo strategy. Studies based on three different reactions, Kemp elimination, Diels-Alder and Retro-Aldolase, are used to illustrate different success achieved during the last years. Finally, a section is devoted to the particular case of designed metalloenzymes. As a general conclusion, the interplay between new and more sophisticated engineering protocols and computational methods, based on molecular dynamics simulations with Quantum Mechanics/Molecular Mechanics potentials and fully flexible models, seems to constitute the bed rock for present and future successful design strategies.
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Affiliation(s)
- K Świderek
- Departament de Química Física, Universitat de València, 46100 Burjasot, Spain; Institute of Applied Radiation Chemistry, Lodz University of Technology, 90-924 Lodz, Poland
| | - I Tuñón
- Departament de Química Física, Universitat de València, 46100 Burjasot, Spain
| | - V Moliner
- Departament de Química Física i Analítica, Universitat Jaume I, 12071 Castellón, Spain
| | - J Bertran
- Departament de Química, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.
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Bertran J, Wavreille VA, Ham KL, McLoughlin MA, Adin CA. Suture-Free Ureterovesical Anastomosis Using a Microvascular Anastomosis System: Canine Cadaveric Study. Vet Surg 2015; 44:731-6. [PMID: 25944776 DOI: 10.1111/vsu.12337] [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: 11/29/2022]
Abstract
OBJECTIVE To describe a suture-free ureterovesical anastomosis using a microvascular anastomotic system (MAS) and compare the surgical time and bursting pressure to a sutured ureterovesical anastomosis (SA) with and without an extravesical seromuscular tunnel (EVSMT). STUDY DESIGN Randomized, unblocked design, ex vivo study. ANIMALS Three canine cadavers. METHODS For each cadaver, the ureters were sectioned into 3 equal lengths. The 6 sections were randomly assigned to receive either the MAS or end-side SA. The first cadaver (3 MAS, 3 SA) was used to refine the technique, and the remaining 2 cadavers were used for evaluation. Surgical time and bursting pressure of the anastomosis were compared between MAS and SA (n = 6 per technique). After bursting pressure testing of each anastomosis, an SMT was created over the anastomoses. Bursting pressures were again recorded and compared across techniques. RESULTS The surgery time was significantly shorter for MAS (median 5.4 minutes) than SA (median 15.8 minutes; P = .002). The bursting pressure was significantly higher for MAS (median 189.5 cmH2 O) than SA (median 64 cmH2 O; P = .002). The bursting pressure for MAS-EVSMT (median 398.5 cmH2 O) was not significantly different from the SA-EVSMT (median 321 cmH2 O, P = .567); however, the creation of an SMT significantly increased the bursting pressure for both techniques (P = .028, respectively). CONCLUSION This study demonstrated the feasibility of a suture-free ureterovesical anastomosis in the canine cadaver using a commercially available MAS. The MAS anastomosis was faster and resulted in higher bursting pressures than SA. The creation of an SMT improved the bursting resistance of both techniques but there was no difference between the techniques covered by an EVSMT.
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Affiliation(s)
- Judith Bertran
- The Ohio State University, 601 Vernon L Tharp St, Columbus, Ohio
| | | | - Kathleen L Ham
- The Ohio State University, 601 Vernon L Tharp St, Columbus, Ohio
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Solano MA, Fitzpatrick N, Bertran J. Cervical Distraction-Stabilization Using an Intervertebral Spacer Screw and String-of Pearl (SOP™) Plates in 16 Dogs With Disc-Associated Wobbler Syndrome. Vet Surg 2015; 44:627-41. [DOI: 10.1111/vsu.12325] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2014] [Accepted: 08/01/2014] [Indexed: 11/29/2022]
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Jimeno J, Acosta G, Teixido C, Olbiol C, Karachaliou N, Molina M, Villacañas O, Sanchez-Ronco M, Bertran J, Gimenez-Capitan A, Monasterio J, Taron M, Rosell R, Albericio F. 478 Pharmacological disruption of the Astrocytic Elevated Gene-1 (AEG1) in anticancer intervention: PB0412_3 (PB03) as a first-in-class AEG1 interacting agent. Eur J Cancer 2014. [DOI: 10.1016/s0959-8049(14)70604-5] [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: 11/17/2022]
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Fitzpatrick N, Bertran J, Solano MA. Sliding Humeral Osteotomy: Medium-Term Objective Outcome Measures and Reduction of Complications With a Modified Technique. Vet Surg 2014; 44:137-49. [DOI: 10.1111/j.1532-950x.2014.12213.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Accepted: 04/08/2013] [Indexed: 12/01/2022]
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Rosell R, Karachaliou N, Molina M, Codony J, Ramirez J, Chaib I, Garcia-Roman S, Morales-Espinosa D, Estrada R, Bertran J, Codony C, Gimenez-Capitan A, Gonzalez-Cao M, Sureda BM, Vergnenegre A, Moran T, Carcereny E, Teixido C, Villanueva A, Sanchez-Ronco M. Can we Do Better with Our Current Therapies for Nsclc? the Spanish Lung Cancer Group Approach. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu324.2] [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: 11/14/2022] Open
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Bertran J, Farrell M, Fitzpatrick N. Successful wound healing over exposed metal implants using vacuum-assisted wound closure in a dog. J Small Anim Pract 2013; 54:381-5. [PMID: 23560823 DOI: 10.1111/jsap.12055] [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: 11/27/2022]
Abstract
An eight-month-old Labrador retriever was presented with a grade IIIb open shearing injury of the left tarsus. Acute severe surgical site infection developed 2 days after pan-tarsal arthrodesis, resulting in wound dehiscence. Vacuum-assisted wound therapy was carried out for 12 days to treat an extensive full-thickness soft tissue defect with exposure of metal implants. New granulation tissue formation covering most of the defect was achieved by day 10 of this therapy. Epithelialization was achieved by second intention healing with open wound management. To the authors' knowledge, this is the first veterinary clinical case report documenting complete healing over exposed metal implants without any requirement for surgical revision.
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Affiliation(s)
- J Bertran
- Fitzpatrick Referrals Ltd., Halfway Lane, Eashing, Godalming, Surrey, UK
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Affiliation(s)
- M Noguera
- a Universitat Autònoma de Barcelona , Spain
| | | | - M Sodupe
- a Universitat Autònoma de Barcelona , Spain
| | - J Bertran
- a Universitat Autònoma de Barcelona , Spain
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Baydoun AR, Bertran J, Thakur S, Dawson J, Palacín M, Knowles RG. y+ LAT-1 mediates transport of the potent and selective iNOS inhibitor, GW274150, in control J774 macrophages. Amino Acids 2006; 31:101-9. [PMID: 16699825 DOI: 10.1007/s00726-005-0311-9] [Citation(s) in RCA: 4] [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: 10/02/2005] [Accepted: 12/14/2005] [Indexed: 10/24/2022]
Abstract
This study has characterised the transport mechanism(s) for the novel and selective inhibitor of inducible nitric oxide synthase (iNOS), GW274150, in murine macrophage J774 cells. Transport of GW274150 was saturable (K(m) = 0.24 +/- 0.01 mM and V(max) of 8.5 +/- 0.12 pmol.microg protein(-1) min(-1)), pH-insensitive and largely Na(+)-independent. Transport was also susceptible to trans-stimulation and was significantly inhibited by a 10-fold excess of L-arginine, L-lysine, L-leucine, L-methionine, L-glutamine and 6-diazo-5-oxo-L-norleucine but not by other amino acids or by N-ethylmaleimide. More importantly, the inhibitions caused by the neutral amino acids were critically dependent on Na(+). These results strongly implicate system y(+)L in the transport of GW274150. Northern blot analysis confirmed this by revealing the presence of transcripts for y(+)LAT-1 but not y(+)LAT-2. Thus, taken together, our data show for the first time that J774 macrophages express y(+)LAT-1 transporters and that these carriers mediate transport of GW2741500 at least in these cells.
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Affiliation(s)
- A R Baydoun
- School of Life Sciences, University of Hertfordshire, Hatfield, UK.
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Ríos-Font R, Bertran J, Rodríguez-Santiago L, Sodupe M. Effects of Ionization, Metal Cationization and Protonation on 2‘-Deoxyguanosine: Changes on Sugar Puckering and Stability of the N-Glycosidic Bond. J Phys Chem B 2006; 110:5767-72. [PMID: 16539523 DOI: 10.1021/jp056089i] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The influence of oxidation, protonation, and metal cationization with Cu(+) and Cu(2+) on the strength of the N-glycosidic bond in 2'-deoxyguanosine has been studied by means of quantum chemical calculations. In all cases, the N9-C1' bond distance increases (0.03-0.06 A) upon introducing positive charge in the guanine moiety, the observed variations being more important for the dicationic systems. Binding energies show that the effect of X(n)(+) in guanine hinders the homolytic dissociation, whereas it largely favors the heterolytic process. With respect to the deoxyribose ring, it has been found that metal binding, oxidation, and protonation do not significantly change the values of the phase angle of pseudorotation P. However, the glycosyl torsion angle chi varies considerably (from 242.0 degrees to 189.8 degrees) as a consequence of a stabilizing guanine-sugar (H8-O4') interaction due to the increase of acidity of guanine C8-H8 upon cationization.
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Affiliation(s)
- R Ríos-Font
- Departament de Quimica, Unitat de Quimica Fisica, Universitat Autonoma de Barcelona, Edifici Cn, 08193 Bellaterra, Barcelona, Spain
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Margalida A, Bertran J. Territorial defence and agonistic behaviour of breeding bearded vulturesGypaetus barbatustoward conspecifics and heterospecifics. ETHOL ECOL EVOL 2005. [DOI: 10.1080/08927014.2005.9522615] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Simon S, Bertran J, Sodupe M. Effect of Counterpoise Correction on the Geometries and Vibrational Frequencies of Hydrogen Bonded Systems. J Phys Chem A 2001. [DOI: 10.1021/jp0043930] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- S. Simon
- Departament de Química, Universitat Autònoma de Barcelona, Bellaterra, 08193, Spain
| | - J. Bertran
- Departament de Química, Universitat Autònoma de Barcelona, Bellaterra, 08193, Spain
| | - M. Sodupe
- Departament de Química, Universitat Autònoma de Barcelona, Bellaterra, 08193, Spain
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Font MA, Feliubadaló L, Estivill X, Nunes V, Golomb E, Kreiss Y, Pras E, Bisceglia L, d'Adamo AP, Zelante L, Gasparini P, Bassi MT, George AL, Manzoni M, Riboni M, Ballabio A, Borsani G, Reig N, Fernández E, Zorzano A, Bertran J, Palacín M. Functional analysis of mutations in SLC7A9, and genotype-phenotype correlation in non-Type I cystinuria. Hum Mol Genet 2001; 10:305-16. [PMID: 11157794 DOI: 10.1093/hmg/10.4.305] [Citation(s) in RCA: 115] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Cystinuria (OMIM 220100) is a common recessive disorder of renal reabsorption of cystine and dibasic amino acids that results in nephrolithiasis of cystine. Mutations in SLC3A1, which encodes rBAT, cause Type I cystinuria, and mutations in SLC7A9, which encodes a putative subunit of rBAT (b(o,+)AT), cause non-Type I cystinuria. Here we describe the genomic structure of SLC7A9 (13 exons) and 28 new mutations in this gene that, together with the seven previously reported, explain 79% of the alleles in 61 non-Type I cystinuria patients. These data demonstrate that SLC7A9 is the main non-Type I cystinuria gene. Mutations G105R, V170M, A182T and R333W are the most frequent SLC7A9 missense mutations found. Among heterozygotes carrying these mutations, A182T heterozygotes showed the lowest urinary excretion values of cystine and dibasic amino acids. Functional analysis of mutation A182T after co-expression with rBAT in HeLa cells revealed significant residual transport activity. In contrast, mutations G105R, V170M and R333W are associated to a complete or almost complete loss of transport activity, leading to a more severe urinary phenotype in heterozygotes. SLC7A9 mutations located in the putative transmembrane domains of b(o,+)AT and affecting conserved amino acid residues with a small side chain generate a severe phenotype, while mutations in non-conserved residues give rise to a mild phenotype. These data provide the first genotype-phenotype correlation in non-Type I cystinuria, and show that a mild urinary phenotype in heterozygotes may associate with mutations with significant residual transport activity.
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Affiliation(s)
- M A Font
- Centre de Genètica Mèdica i Molecular (IRO), Hospital Duran i Reynals, Autovía de Castelldefels Km 2.7, L'Hospitalet de Llobregat, E-08907 Barcelona, Spain
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Rodrı́guez-Santiago L, Vendrell O, Tejero I, Sodupe M, Bertran J. Solvent-assisted catalysis in the enolization of acetaldehyde radical cation. Chem Phys Lett 2001. [DOI: 10.1016/s0009-2614(00)01458-5] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Pulkkinen S, Noguera M, Rodríguez-Santiago L, Sodupe M, Bertran J. Gas phase intramolecular proton transfer in cationized glycine and chlorine substituted derivatives (M-Gly, M = Na+, Mg2+, Cu+, Ni+, and Cu2+): existence of Zwitterionic structures? Chemistry 2000; 6:4393-9. [PMID: 11140970 DOI: 10.1002/1521-3765(20001201)6:23<4393::aid-chem4393>3.0.co;2-h] [Citation(s) in RCA: 57] [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: 11/07/2022]
Abstract
The intramolecular proton transfer in cationized glycine and chlorine substituted derivatives with M = Na+, Mg2+, Ni+, Cu+, and Cu2+ has been studied with the three parameter B3LYP density functional method. The coordination of metal cations to the oxygens of the carboxylic group of glycine stabilizes the zwitterionic structure. For all monocations the intramolecular proton transfer occurs readily with small energy barriers (1-2 kcalmol(-1)). For the dication Mg2+ and Cu2+ systems, the zwitterionic structure becomes very stable. However, whereas for Mg2+, the proton transfer process takes place spontaneously, for Cu2+ the reaction occurs with an important energy barrier. The substitution of the hydrogens of the amino group by chlorine atoms decreases the basicity of nitrogen, which destabilizes the zwitterionic structure. For monosubstituted glycine complexed with Na+, the zwitterionic structure still exists as a minimum, but for disubstituted glycine no minimum appears for this structure. In contrast, for Mg2+ complexed to mono- and disubstituted glycine, the zwitterionic structure remains the only minimum, since the enhanced electrostatic interaction with the dication overcomes the destabilizing effect of the chlorine atoms.
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Affiliation(s)
- S Pulkkinen
- Department of Chemistry, University of Joensuu, Finland
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Abstract
In the past 5 years, the first genes responsible for aminoacidurias caused by defects in renal reabsorption transport mechanisms have been identified. These diseases are type I and non-type I cystinuria and lysinuric protein intolerance. This knowledge came from the molecular characterization of the first heteromeric amino acid transporters in mammals. In 1992, rBAT and 4F2hc (genes SLC3A1 and SLC3A2, respectively, in the nomenclature of the Human Genome Organization) were identified as putative heavy subunits of mammalian amino acid transporters. In 1994, it was demonstrated that mutations in SLC3A1 cause type I cystinuria. Very recently, several light subunits of the heteromeric amino acid transporters have been identified. In 1999, a putative light subunit of rBAT (the SLC7A9 gene; complementary DNA and protein termed amino acid transporter) and a light subunit of 4F2hc (the SLC7A7 gene; cDNA and protein termed y+LAT-1) were shown to be the non-type I cystinuria and lysinuric protein intolerance genes, respectively. In this review, the characteristics of these heteromeric amino acid transporters and their role in these inherited aminoacidurias is described.
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Affiliation(s)
- M Palacín
- Department of Biochemistry and Molecular Biology, Faculty of Biology, University of Barcelona, Spain.
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Affiliation(s)
- L. Rodríguez-Santiago
- Departament de Química, Facultat de Ciencies, Universitat Autònoma de Barcelona, Bellaterra 08193 Spain
| | - M. Sodupe
- Departament de Química, Facultat de Ciencies, Universitat Autònoma de Barcelona, Bellaterra 08193 Spain
| | - A. Oliva
- Departament de Química, Facultat de Ciencies, Universitat Autònoma de Barcelona, Bellaterra 08193 Spain
| | - J. Bertran
- Departament de Química, Facultat de Ciencies, Universitat Autònoma de Barcelona, Bellaterra 08193 Spain
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Rodríguez-Santiago L, Sodupe M, Oliva A, Bertran J. Hydrogen Atom or Proton Transfer in Neutral and Single Positive Ions of Salicylic Acid and Related Compounds. J Am Chem Soc 1999. [DOI: 10.1021/ja990919m] [Citation(s) in RCA: 47] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- L. Rodríguez-Santiago
- Contribution from the Departament de Química, Facultat de Ciencies, Universitat Autònoma de Barcelona, Bellaterra 09193 Spain
| | - M. Sodupe
- Contribution from the Departament de Química, Facultat de Ciencies, Universitat Autònoma de Barcelona, Bellaterra 09193 Spain
| | - A. Oliva
- Contribution from the Departament de Química, Facultat de Ciencies, Universitat Autònoma de Barcelona, Bellaterra 09193 Spain
| | - J. Bertran
- Contribution from the Departament de Química, Facultat de Ciencies, Universitat Autònoma de Barcelona, Bellaterra 09193 Spain
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Valty J, Frèal S, Nguyen Khoa C, Demoulin D, Bertran J. A multifactorial health risk questionnaire. Int Arch Occup Environ Health 1999; 72 Suppl:S6-7. [PMID: 10197463] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
OBJECTIVE to assess the relations between cardiovascular risk factors and psychological or socio-economic status. METHODS We used a self-questionnaire including data upon usual risk factors, anxiety, depression, behavioural pattern, somatic manifestations, life style, incomes and work-related stress. We gathered 955 people, mainly attending an occupational health examination, filling anonymously the same restricted questionnaire (83 questions). RESULTS Non-working people represented only 4.4 per cent of the study group and included mainly retired people. They differed significantly from wage earners by a higher level of cardiovascular risk and depression, respectively 15.8 (s.d. 11.3) versus 7.8 (6.7) and 5.6 (3.5) versus 3.9 (2.8). These differences can be related to older age of this group. Among working people, 30 per cent felt job-insecurity; they differed significantly from working people by a higher level of anxiety, 8.9 (3.7) versus 7.5 (3.3). There was no difference concerning the absolute cardiovascular risk or the behavioural pattern. A comprehensive self questionnaire is proposed.
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Affiliation(s)
- J Valty
- Hospital Saint-Antoine, Paris, France
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Bertran J, Claussen B. The ICOH Working Group "Unemployment and Health" Paris 25-26 September 1998: an introduction. International Commission of Occupational Health. Int Arch Occup Environ Health 1999; 72 Suppl:S3-5. [PMID: 10197462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Affiliation(s)
- J Bertran
- Association pour la Santé du Non-Travail, Luçon, France
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Abstract
Molecular biology entered the field of mammalian amino acid transporters in 1990-1991 with the cloning of the first GABA and cationic amino acid transporters. Since then, cDNA have been isolated for more than 20 mammalian amino acid transporters. All of them belong to four protein families. Here we describe the tissue expression, transport characteristics, structure-function relationship, and the putative physiological roles of these transporters. Wherever possible, the ascription of these transporters to known amino acid transport systems is suggested. Significant contributions have been made to the molecular biology of amino acid transport in mammals in the last 3 years, such as the construction of knockouts for the CAT-1 cationic amino acid transporter and the EAAT2 and EAAT3 glutamate transporters, as well as a growing number of studies aimed to elucidate the structure-function relationship of the amino acid transporter. In addition, the first gene (rBAT) responsible for an inherited disease of amino acid transport (cystinuria) has been identified. Identifying the molecular structure of amino acid transport systems of high physiological relevance (e.g., system A, L, N, and x(c)- and of the genes responsible for other aminoacidurias as well as revealing the key molecular mechanisms of the amino acid transporters are the main challenges of the future in this field.
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Affiliation(s)
- M Palacín
- Departament de Bioquímica i Biologia Molecular, Facultat de Biologia, Universitat de Barcelona, Spain
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Bertran J, Yang Y, Hargrove P, Vanin EF, Nienhuis AW. Targeted integration of a recombinant globin gene adeno-associated viral vector into human chromosome 19. Ann N Y Acad Sci 1998; 850:163-77. [PMID: 9668538 DOI: 10.1111/j.1749-6632.1998.tb10473.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Transfer of a globin gene into stem cells along with the regulatory elements required to achieve high level expression in maturing erythroid cells would provide effective gene therapy for Cooley's Anemia. We have explored the use of recombinant adeno-associated viral (rAAV) vectors for this purpose. A vector designated rHS32A gamma*3'RE that contains regulatory elements from the locus control and flanking regions, integrates as a stable head-to-tail concatamer in erythroleukemia cells at a high multiplicity of infection and exhibits high level, regulated gamma globin gene expression. Inducible expression of the non-structural Rep proteins of wild-type AAV in HeLa cells transduced with rAAV vectors does not increase overall integration frequency, but targeted integration of rHS32A gamma*'3'RE into human chromosome 19 was documented.
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Affiliation(s)
- J Bertran
- Department of Hematology/Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA
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50
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Abstract
Transfer of a gene into stem cells with subsequent lineage-specific gene expression is a desired goal with many potential therapeutic applications. Retroviral vectors developed from murine leukemia viruses reproducibly transfer genes into murine stem cells, but are inefficient at gene insertion into stem cells of larger animals or man. A growing knowledge of stem cell biology suggests that this inefficiency reflects the quiescent state of stem cells, even when incubated in the presence of multiple cytokines and low expression of the receptor for amphotropic retroviral vectors. Alternative vector systems are being explored in an effort to overcome these barriers to stem cell-targeted gene transfer. Our work has shown that recombinant adeno-associated virus vectors, which have the potential for transducing quiescent cells, transfer, express and integrate a globin gene linked to its normal regulatory elements in human erythroid cells, but only at very high multiplicities of infection. The integrated genome was stable and the encoded globin gene was expressed at levels equivalent to a normal globin gene.
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Affiliation(s)
- A W Nienhuis
- Department of Hematology/Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
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