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Munday JS, Dunbar ME, Wightman P, Piripi S. Osteoinductive squamous cell carcinoma associated with a putative novel papillomavirus on the digit of a cat. N Z Vet J 2024; 72:112-117. [PMID: 38043925 DOI: 10.1080/00480169.2023.2285294] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2023] [Accepted: 11/13/2023] [Indexed: 12/05/2023]
Abstract
CASE HISTORY AND CLINICAL FINDINGS An approximately 10-year-old, castrated male domestic short-haired cat developed swelling and ulceration of the second digit of the right front paw. Radiographs revealed a spherical soft tissue swelling with irregular distal margins that contained multiple lacy mineral opacities. The digit was amputated and submitted for histology. No recurrence has been observed 7 months after amputation. PATHOLOGICAL AND MOLECULAR FINDINGS Histology revealed a moderately well-circumscribed proliferation of well-differentiated squamous cells arranged in trabeculae and nests. Numerous thin spicules of osseous metaplasia were visible throughout the neoplasm. Around 70% of the neoplastic cells contained papillomavirus-induced cell changes including large amphophilic cytoplasmic bodies and cells with shrunken nuclei surrounded by a clear halo. Intense p16CDKN2A protein immunostaining was visible within the neoplastic cells, suggesting papillomavirus-induced changes in cell regulation. A DNA sequence from a putative novel Taupapillomavirus type was amplified from the neoplasm. DIAGNOSIS Osteoinductive squamous cell carcinoma associated with a putative novel papillomavirus type. CLINICAL RELEVANCE The findings in this case increase the number of papillomavirus types known to infect cats, and the squamous cell carcinoma had histological features that have not been previously reported. The neoplasm was not as invasive as is typical for a squamous cell carcinoma and excision appeared curative. This is the first report of an osteoinductive squamous cell carcinoma of the skin of cats and the neoplasm had a unique radiographic appearance.
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Affiliation(s)
- J S Munday
- Department of Pathobiology, Tāwharau Ora - School of Veterinary Science, Massey University, Palmerston North, New Zealand
| | - M E Dunbar
- Pet Doctors Hillcrest, Hamilton, New Zealand
| | - P Wightman
- Veterinary Teaching Hospital, Tāwharau Ora - School of Veterinary Science, Massey University, Palmerston North, New Zealand
| | - S Piripi
- IDEXX Laboratories (NZ), Palmerston North, New Zealand
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Khude R, Huxley J, Hunter S, Wightman P, Gartrell BD. Cardiac morphology of North Island brown kiwi ( Apteryx mantelli). N Z Vet J 2023; 71:109-115. [PMID: 36519293 DOI: 10.1080/00480169.2022.2158955] [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: 12/23/2022]
Abstract
AIMS To investigate the cardiac anatomy of North Island brown kiwi (Apteryx mantelli) through heart morphometric parameters measured at post-mortem examination. METHODS Morphometric cardiac parameters were established at post-mortem examination of 20 North Island brown kiwi. Birds were classified by gender and age (chicks vs. adults). Measurements included: body mass, heart mass, sternal length, midpoint thickness of left ventricular free wall, midpoint thickness of right ventricular free wall and ratios of heart mass to body mass, left ventricular length to sternal length, right ventricular length to sternal length, length of left ventricle to right ventricle, interventricular septal thickness relative to the sternal length and interventricular septal thickness relative to the left ventricular length. Unadjusted estimates of the median difference and their 95% CI were then reported at each age and sex for all the cardiac morphometric parameters and their ratios. RESULTS The small sample size led to wide 95% CI for the median difference between gender and age for the cardiac morphometric measurements. Nevertheless, between adult female and male kiwi, the estimated population median differences for heart mass (2.2 (95% CI = -2.9-5.6) g), length (1.2 (95% CI = -2.2-5.6) mm), width (6.1 (95% CI = -1.0-8.2) mm), left ventricular free wall length (5.5 (95% CI = -0.5-8.8) mm) and right ventricular free wall length (2.6 (95% CI = -3.7-6.9) mm) were established. In adult North Island brown kiwi, the heart mass is 0.8 (95% CI = 0.7-0.8)% of the body mass. CONCLUSIONS The precision of the differences noted in heart measurements recorded between male and female kiwi at each age was limited by the low sample size available for this study. This led to wide CI and an inability to adjust differences observed for gender by differences in other confounders such as body size. With this caveat, there is weak evidence that adult female kiwi have a larger heart size and mass than the adult males. CLINICAL RELEVANCE These results can be used to improve the diagnosis of cardiac disease in kiwi at post-mortem examination and aid in interpretation of the results of echocardiography in live birds for the antemortem diagnosis of cardiac disorders.
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Affiliation(s)
- R Khude
- Tāwharau Ora-School of Veterinary Science, Massey University, Palmerston North, New Zealand
| | - J Huxley
- Apex Cardiology, Palmerston North, New Zealand
| | - S Hunter
- Tāwharau Ora-School of Veterinary Science, Massey University, Palmerston North, New Zealand
| | - P Wightman
- Tāwharau Ora-School of Veterinary Science, Massey University, Palmerston North, New Zealand
| | - B D Gartrell
- Tāwharau Ora-School of Veterinary Science, Massey University, Palmerston North, New Zealand
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3
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Pauwels F, Hartmann A, Alawneh J, Wightman P, Saunders J. Contrast Enhanced Computed Tomography Findings in 105 Horse Distal Extremities. J Equine Vet Sci 2021; 104:103704. [PMID: 34416993 DOI: 10.1016/j.jevs.2021.103704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 06/30/2021] [Accepted: 07/06/2021] [Indexed: 11/15/2022]
Abstract
The poor soft tissue conspicuity of CT can be improved by using intra-arterial CT Angiography (CTA), and intra-articular and intra-bursal contrast enhanced CT (CTAR). This retrospective study describes a combination protocol of CT and CTA of the horse's foot, and CTAR of the distal interphalangeal joint and navicular bursa. It is hypothesized this would provide a comprehensive overview of the range and severity of distal limb pathology. Radiology reports of all horses admitted for distal limb CT over a 5 year period were reviewed. All horses with a complete four stage CT examination and radiology report with lameness isolated to the foot were included. Twenty seven imaging findings using a four grade semiquantitative severity scoring system contributing towards six main diagnostic categories were described. One hundred and five examinations on 56 horses revealed a diagnosis of navicular bone disease in 64%, deep digital flexor tendinopathy in 43%, distal interphalangeal osteoarthritis in 35%, navicular bursitis in 31%, distal interphalangeal collateral ligament desmopathy in 26%, and hoof capsule and distal phalanx pathology in 10%. Only 25% of the navicular bone disease cases were considered clinically significant. The majority of deep digital flexor tendon lesions (77%) and distal interphalangeal joint osteoarthritis (51%) were considered significant. Approximately one third of navicular bursa (37%) and collateral ligament (33%) abnormalities were considered significant. Navicular bursa abnormalities were associated with navicular bone and deep digital flexor tendon lesions. The findings support the hypothesis and the use of this protocol for evaluation of foot lameness.
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Affiliation(s)
- Frederik Pauwels
- Radiology Department, Massey University School of Veterinary Science, University Ave, Palmerston North, New Zealand.
| | - Angela Hartmann
- Radiology Department, Massey University School of Veterinary Science, University Ave, Palmerston North, New Zealand
| | - John Alawneh
- Murdoch University, School of Veterinary Medicine, Murdoch 6150, Western Australia, Australia
| | - Paul Wightman
- Radiology Department, Massey University School of Veterinary Science, University Ave, Palmerston North, New Zealand
| | - Jimmy Saunders
- Radiology Department, School of Veterinary Medicine, University of Gent, Merelbeke, Belgium
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Sano H, Fujiyama M, Wightman P, Cave NJ, Gieseg MA, Johnson CB, Chambers P. Investigation of percentage changes in pulse wave transit time induced by mini-fluid challenges to predict fluid responsiveness in ventilated dogs. J Vet Emerg Crit Care (San Antonio) 2019; 29:391-398. [PMID: 31222978 DOI: 10.1111/vec.12860] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 08/22/2017] [Accepted: 09/06/2017] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To investigate whether percentage changes in pulse wave transit time (PWTT%Δ) induced by mini-fluid challenges predict fluid responsiveness in mechanically ventilated anesthetized dogs. DESIGN Prospective experimental trial. SETTING University teaching hospital. ANIMALS Twelve Harrier hounds. INTERVENTION Each dog was anesthetized with propofol and isoflurane after premedication with acepromazine, mechanically ventilated, and had a fluid challenge. This was repeated 4 weeks later. The fluid challenge, 10 mL/kg of colloid administration over 13 minutes, consisted of 3 intermittent mini-fluid challenges (1 mL/kg of each over a minute) with a minute interval, and the remaining colloid administration (7 mL/kg) over 7 minutes. MEASUREMENTS AND MAIN RESULTS Percentage change in velocity time integral of pulmonary arterial flow by echocardiography was calculated as an indication of change in stroke volume. Fluid responsiveness was defined as percentage change in velocity time integral ≥ 15% after 10 mL/kg colloid. Dogs responded on 14 fluid challenges and did not on 10. After 1, 2, 3, and 10 mL/kg of fluid challenge, PWTT%Δ1, 2, 3, 10 were measured. Receiver operator characteristic (ROC) curves were generated and areas under ROC curve were calculated for PWTT%Δ1, 2, 3 . A gray zone approach was used to identify the clinically inconclusive range. The area under the ROC curve for PWTT%Δ3 was 0.91 (P = 0.001). Cutoff value for PWTT%Δ3 was -2.5% (sensitivity: 86%, specificity: 90%). The gray zone for PWTT%Δ3 was identified as between -2.9% to -1.9% for which fluid responsiveness could not be predicted reliably in 6 out of 24 fluid challenges. CONCLUSIONS In mechanically ventilated anesthetized dogs given a mini-fluid challenge of 3 mL/kg of colloid, PWTT%Δ could predict fluid responsiveness although the gray zone should be considered.
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Affiliation(s)
- Hiroki Sano
- School of Veterinary Science, Massey University, Palmerston North, New Zealand
| | - Masako Fujiyama
- School of Veterinary Science, Massey University, Palmerston North, New Zealand
| | - Paul Wightman
- School of Veterinary Science, Massey University, Palmerston North, New Zealand
| | - Nick J Cave
- School of Veterinary Science, Massey University, Palmerston North, New Zealand
| | - Mike A Gieseg
- Veterinary Health Research NZ, Waikato Innovation Park, Hamilton, New Zealand
| | - Craig B Johnson
- School of Veterinary Science, Massey University, Palmerston North, New Zealand
| | - Paul Chambers
- School of Veterinary Science, Massey University, Palmerston North, New Zealand
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Kopke MA, Wightman P, Ruaux CG. Obstructive sleep apnea in a Chihuahua successfully managed with ondansetron. Clin Case Rep 2019; 7:872-876. [PMID: 31110706 PMCID: PMC6510004 DOI: 10.1002/ccr3.2110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 03/02/2019] [Indexed: 12/19/2022] Open
Abstract
While the persistence of clinical signs related to brachycephalic obstructive airway syndrome, particularly sleep-disordered breathing patterns following appropriate surgical management is likely to be relatively rare, this potential sequela needs to be considered, along with being aware of possible medical management options such as serotonin antagonists.
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Affiliation(s)
- Matthew A. Kopke
- School of Veterinary ScienceMassey University Veterinary Teaching HospitalPalmerston NorthNew Zealand
| | - Paul Wightman
- School of Veterinary ScienceMassey University Veterinary Teaching HospitalPalmerston NorthNew Zealand
| | - Craig G. Ruaux
- School of Veterinary ScienceMassey University Veterinary Teaching HospitalPalmerston NorthNew Zealand
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Sano H, Seo J, Wightman P, Cave NJ, Gieseg MA, Johnson CB, Chambers P. Evaluation of pulse pressure variation and pleth variability index to predict fluid responsiveness in mechanically ventilated isoflurane-anesthetized dogs. J Vet Emerg Crit Care (San Antonio) 2018; 28:301-309. [PMID: 29898246 DOI: 10.1111/vec.12728] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Revised: 07/29/2016] [Accepted: 08/19/2016] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To evaluate whether pulse pressure variation (PPV) and pleth variability index (PVI) are more accurate than central venous pressure (CVP) for predicting fluid responsiveness in mechanically ventilated isoflurane-anesthetized dogs after premedication with acepromazine. DESIGN Prospective experimental trial. SETTING University teaching hospital. ANIMALS Twelve Harrier hound dogs. INTERVENTIONS Each dog was anesthetized and had a fluid challenge performed. This was repeated 4 weeks later for a total of 24 fluid challenges. After premedication with intramuscular acepromazine, anesthesia was induced with propofol and maintained with isoflurane. The dogs were mechanically ventilated with constant settings. The fluid challenge consisted of 10 mL/kg of 6% hydroxyethyl starch intravenously over 13 minutes. MEASUREMENTS AND MAIN RESULTS Before and after the fluid challenge, PPV, PVI, CVP, and other hemodynamics were recorded. Change in velocity time integral of pulmonary arterial blood flow by echocardiography was calculated as an indication of change in stroke volume. A fluid responder was defined as an increase in velocity time integral ≥ 15%. Receiver operator characteristic (ROC) curves were used to determine cutoff values. Areas under ROC curve were calculated and compared. Dogs responded on 14 fluid challenges and did not on 10. Cutoff values for PPV and PVI were 11% (sensitivity 79%; specificity 80%) and 9.3% (sensitivity 86%; specificity 70%), respectively. The areas under the ROC curve of PPV [0.85, 95% confidence interval (CI): 0.70-1.00, P = 0.038] and PVI (0.84, 95% CI: 0.68-1.00, P = 0.043) were significantly higher than CVP (0.56, 95% CI: 0.32-0.81). CONCLUSIONS PPV and PVI predicted fluid responsiveness more accurately than CVP and may be useful to guide fluid administration in mechanically ventilated isoflurane-anesthetized dogs after premedication with acepromazine.
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Affiliation(s)
- Hiroki Sano
- Institute of Veterinary, Animal and Biomedical Sciences, College of Sciences, Massey University, Palmerston North 4442
| | - Joonbum Seo
- Institute of Veterinary, Animal and Biomedical Sciences, College of Sciences, Massey University, Palmerston North 4442
| | - Paul Wightman
- Institute of Veterinary, Animal and Biomedical Sciences, College of Sciences, Massey University, Palmerston North 4442
| | - Nick J Cave
- Institute of Veterinary, Animal and Biomedical Sciences, College of Sciences, Massey University, Palmerston North 4442
| | - Mike A Gieseg
- Veterinary Health Research NZ, Hamilton 3240, New Zealand
| | - Craig B Johnson
- Institute of Veterinary, Animal and Biomedical Sciences, College of Sciences, Massey University, Palmerston North 4442
| | - Paul Chambers
- Institute of Veterinary, Animal and Biomedical Sciences, College of Sciences, Massey University, Palmerston North 4442
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Wightman P, Cohen EB, Hunter S, Gartrell B. IMAGING DIAGNOSIS--USE OF RADIOGRAPHY AND COMPUTED TOMOGRAPHY IN THE DIAGNOSIS OF A MINERALIZED YOLK SAC IN A BROWN KIWI (APTERYX MANTELLI). Vet Radiol Ultrasound 2014; 56:E40-3. [PMID: 25199884 DOI: 10.1111/vru.12208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Accepted: 05/20/2014] [Indexed: 11/29/2022] Open
Abstract
A 12-day-old Brown Kiwi (Apteryx mantelli) was presented with anorexia, torticollis, head-tilt, and coelomic distension. Radiographs showed an ill-defined, fat-opaque, coelomic mass displacing viscera craniodorsally. Curvilinear mineral opacities were superimposed over the ventral aspect of the mass. Computed tomography demonstrated the presence of mineral within the periphery of a fat attenuating mass consistent with a retained yolk sac. A deutectomy (yolk sac excision) was performed. Histopathology of the excised tissue confirmed the diagnosis of a retained yolk sac with multifocal mineralization.
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Affiliation(s)
- Paul Wightman
- Veterinary Teaching Hospital, Radiology, Massey University, Palmerston North, 4442, New Zealand
| | - Eli B Cohen
- Veterinary Teaching Hospital, Radiology, Massey University, Palmerston North, 4442, New Zealand
| | - Stuart Hunter
- Veterinary Teaching Hospital, Pathology, Massey University, Palmerston North, 4442, New Zealand
| | - Brett Gartrell
- Wildbase, Institute of Veterinary, Animal and Biomedical Sciences, Massey University, Palmerston North, New Zealand
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Qin J, Yao J, Cui G, Xiao H, Kim TW, Fraczek J, Wightman P, Sato S, Akira S, Puel A, Casanova JL, Su B, Li X. TLR8-mediated NF-kappaB and JNK activation are TAK1-independent and MEKK3-dependent. J Biol Chem 2006; 281:21013-21021. [PMID: 16737960 DOI: 10.1074/jbc.m512908200] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
TLR8-mediated NF-kappaB and IRF7 activation are abolished in human IRAK-deficient 293 cells and IRAK4-deficient fibroblast cells. Both wild-type and kinase-inactive mutants of IRAK and IRAK4, respectively, restored TLR8-mediated NF-kappaB and IRF7 activation in the IRAK- and IRAK4-deficient cells, indicating that the kinase activity of IRAK and IRAK4 is probably redundant for TLR8-mediated signaling. We recently found that TLR8 mediates a unique NF-kappaB activation pathway in human 293 cells and mouse embryonic fibroblasts, accompanied only by IkappaBalpha phosphorylation and not IkappaBalpha degradation, whereas interleukin (IL)-1 stimulation causes both IkappaBalpha phosphorylation and degradation. The intermediate signaling events mediated by IL-1 (including IRAK modifications and degradation and TAK1 activation) were not detected in cells stimulated by TLR8 ligands. TLR8 ligands trigger similar levels of IkappaBalpha phosphorylation and NF-kappaB and JNK activation in TAK1(-/-) mouse embryo fibroblasts (MEFs) as compared with wild-type MEFs, whereas lack of TAK1 results in reduced IL-1-mediated NF-kappaB activation and abolished IL-1-induced JNK activation. The above results indicate that although TLR8-mediated NF-kappaB and JNK activation are IRAK-dependent, they do not require IRAK modification and are TAK1-independent. On the other hand, TLR8-mediated IkappaBalpha phosphorylation, NF-kappaB, and JNK activation are completely abolished in MEKK3(-/-) MEFs, whereas IL-1-mediated signaling was only moderately reduced in these deficient MEFs as compared with wild-type cells. The differences between IL-1R- and TLR8-mediated NF-kappaB activation are also reflected at the level of IkappaB kinase (IKK) complex. TLR8 ligands induced IKKgamma phosphorylation, whereas IKKalpha/beta phosphorylation and IKKgamma ubiquitination that can be induced by IL-1 were not detected in cells treated with TLR8 ligands. We postulate that TLR8-mediated MEKK3-dependent IKKgamma phosphorylation might play an important role in the activation of IKK complex, leading to IkappaBalpha phosphorylation.
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Affiliation(s)
- Jinzhong Qin
- Department of Immunology, Cleveland Clinic Foundation, Cleveland, Ohio 44195
| | - Jianhong Yao
- Department of Immunology, Cleveland Clinic Foundation, Cleveland, Ohio 44195
| | - Grace Cui
- Department of Immunology, Cleveland Clinic Foundation, Cleveland, Ohio 44195
| | - Hui Xiao
- Department of Immunology, Cleveland Clinic Foundation, Cleveland, Ohio 44195
| | - Tae Whan Kim
- Department of Immunology, Cleveland Clinic Foundation, Cleveland, Ohio 44195
| | - Jerzy Fraczek
- Department of Immunology, Cleveland Clinic Foundation, Cleveland, Ohio 44195
| | | | - Shintaro Sato
- Osaka University, Japan Science and Technology Agency, 3-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Shizuo Akira
- Osaka University, Japan Science and Technology Agency, 3-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Anne Puel
- Laboratory of Human Genetics of Infectious Diseases, University of Paris René Descartes INSERM U550, Necker Medical School, Paris 75015, France
| | - Jean-Laurent Casanova
- Laboratory of Human Genetics of Infectious Diseases, University of Paris René Descartes INSERM U550, Necker Medical School, Paris 75015, France
| | - Bing Su
- University of Texas M. D. Anderson Cancer Center, Houston, Texas 77054
| | - Xiaoxia Li
- Department of Immunology, Cleveland Clinic Foundation, Cleveland, Ohio 44195
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Cassano-Bailey A, Szabo A, Wightman P, Tan L, Unruh H. Psychosocial determinants and consequences of subclinical non-compliance in lung transplant recipients. J Heart Lung Transplant 2004. [DOI: 10.1016/j.healun.2003.11.279] [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: 11/15/2022] Open
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10
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Telford EA, Wightman P, Leek J, Markham AF, Lench NJ, Bonthron DT. cDNA cloning, genomic organization, and chromosomal localization of a novel human gene that encodes a kinesin-related protein highly similar to mouse Kif3C. Biochem Biophys Res Commun 1998; 242:407-12. [PMID: 9446808 DOI: 10.1006/bbrc.1997.7977] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
We report the cloning and characterization of a novel human kinesin-like gene with strong homology to the mouse kinesin Kif3c. The full-length cDNA contains an open reading frame of 2382 nucleotides encoding a predicted 793 amino acid peptide that includes a 389 amino acid motor domain conserved among other kinesins. PCR and DNA sequence analysis of PAC clones containing the human KIF3C sequence revealed that the gene contains 8 exons. All introns have the conserved GT and AG dinucleotides present at their donor and acceptor sites, respectively. We have localized KIF3C to chromosome band 2p23 by fluorescence in situ hybridization.
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Affiliation(s)
- E A Telford
- Molecular Medicine Unit, St. James's University Hospital, University of Leeds, United Kingdom.
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Abstract
Production brewing strains of the yeast Saccharomyces cerevisiae were analysed by DNA fingerprinting, using a Southern blotting and hybridization procedure and employing the Ty1-15 transposon as a probe. The ability to differentiate readily between strains was very dependent on the restriction enzyme used to digest the DNA prior to Southern blotting and hybridization; the enzymes EcoRI, PstI and SalI were found to be particularly useful in this respect. The method was applicable to the differentiation of both ale and lager yeasts, and was sufficiently sensitive to distinguish between very closely related strains. DNA fingerprinting by this approach confirmed, for example, that a flocculent strain isolated during a production-scale fermentation with a lager yeast was genotypically different from the parent.
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Affiliation(s)
- P Wightman
- International Centre for Brewing and Distilling, Heriot-Watt University, Edinburgh, UK
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12
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Smith KD, Elliott MA, Elliott HG, McLaughlin CM, Wightman P, Wood GC. Heterogeneity of alpha 1-acid glycoprotein in rheumatoid arthritis. J Chromatogr B Biomed Appl 1994; 661:7-14. [PMID: 7866554 DOI: 10.1016/0378-4347(94)00335-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
alpha 1-Acid glycoprotein (AGP) or orosomucoid is a major serum glycoprotein, of unknown physiological function, which is classified as one of the positive acute phase reactants since its plasma concentration becomes elevated two- to five-fold in certain disease states. Additionally, the proportions and identities of the five asparaginyl-linked complex oligosaccharide chains are altered during several physiological and pathological conditions, which may be functionally significant. The key to studying the structural heterogeneity of AGP is to develop a procedure that will isolate AGP without structural degradation. We have developed a method for the purification of AGP, using procedures unlikely to damage the glycoprotein structure, which was utilised to isolate AGP from samples of normal and rheumatoid plasma. The effectiveness of the purification procedure was examined by enzymatically deglycosylating each sample of AGP and separating the released oligosaccharides by chromatography on a pellicular high-performance anion-exchange (HPAE) resin at pH 13. The analytical profile for normal AGP was consistent with that previously reported thus indicating that the purification procedure did not denature the oligosaccharide chains of AGP. Additionally, there was a noticeable difference between the profiles for AGP from normal and rheumatoid plasma.
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Affiliation(s)
- K D Smith
- Department of Pharmaceutical Sciences, University of Strathclyde, Glasgow, UK
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13
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Firestone RA, Pisano JM, Bailey PJ, Sturm A, Bonney RJ, Wightman P, Devlin R, Lin CS, Keller DL, Tway PC. Lysosomotropic agents. 4. Carbobenzoxyglycylphenylalanyl, a new protease-sensitive masking group for introduction into cells. J Med Chem 1982; 25:539-44. [PMID: 7045368 DOI: 10.1021/jm00347a012] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Bioactive primary and secondary amines, when acylated with the Z-Gly-Phe group, are transported into pinocytic cells, such as macrophages, P-815 mastocytoma, SV-40 3T3, and leukemia 1210, much faster than the parent compounds. Amines such as lysosomotropic detergents [R. A. Firestone, J. M. Pisano, and R. J. Bonney, J. Med. Chem., 22, 1130 (1979) and nitrogen mustard, which are deactivated by acylation, are unmasked by enzymic action intracellularly, probably in lysosomes because an acidic pH maximum in activity exists which acts only on the L isomer. The added polarity and molecular weight brought about by acylation prevents the amines' normally facile entry into cells by simple diffusion, restricting it to an active-transport mechanism.
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14
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Bresnick E, Bailey G, Bonney RJ, Wightman P. Phospholipase activity in skin after application of phorbol esters and 3-methylcholanthrene. Carcinogenesis 1981; 2:1119-22. [PMID: 6797751 DOI: 10.1093/carcin/2.11.1119] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
Topical administration of the promoter, 12-O-tetradecanoylphorbol-13-acetate (TPA), is accompanied by an increased incorporation of [3H]arachidonic acid into mouse skin and a very significant activation of epidermal cell membrane phospholipase A2 without affecting intracellular acid phospholipase. Similar enhancement in epidermal cell phospholipase A2 was observed after application of phorbol-12,13-didecanoate or 3-methylcholanthrene to mouse skin. A small but significant increase in phospholipase A2 activity is also seen after application of the nonpromoter irritant, acetic acid. The elevated levels of the prostaglandins observed in mouse skin after topical application of promoters are probably triggered by the activation of this membrane enzyme.
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