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Bacon EK, Donnelly CG, Bellone RR, Haase B, Finno CJ, Velie BD. Preliminary investigation of potential links between pigmentation variants and opioid analgesic effectiveness in horses during cerebrospinal fluid centesis. BMC Vet Res 2024; 20:311. [PMID: 38997753 PMCID: PMC11245827 DOI: 10.1186/s12917-024-04139-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Accepted: 06/17/2024] [Indexed: 07/14/2024] Open
Abstract
BACKGROUND The pleiotropic effects of the melanocortin system show promise in overcoming limitations associated with large variations in opioid analgesic effectiveness observed in equine practice. Of particular interest is variation in the melanocortin-1-receptor (MC1R) gene, which dictates pigment type expression through its epistatic interaction with the agouti signalling protein (ASIP) gene. MC1R has previously been implicated in opioid efficacy in other species; however, this relationship is yet to be explored in horses. In this study, analgesic effectiveness was scored (1-3) based on noted response to dura penetration during the performance of cerebrospinal fluid centisis after sedation and tested for association with known genetic regions responsible for pigmentation variation in horses. RESULTS The chestnut phenotype was statistically significant (P < 0.05) in lowering analgesic effectiveness when compared to the bay base coat colour. The 11bp indel in ASIP known to cause the black base coat colour was not significant (P>0.05); however, six single nucleotide polymorphisms (SNPs) within the genomic region encoding the ASIP gene and one within MC1R were identified as being nominally significant (P<0.05) in association with opioid analgesic effectiveness. This included the location of the known e MC1R variant resulting in the chestnut coat colour. CONCLUSIONS The current study provides promising evidence for important links between pigmentation genes and opioid effectiveness in horses. The application of an easily identifiable phenotype indicating variable sensitivity presents a promising opportunity for accessible precision medicine in the use of analgesics and warrants further investigation.
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Affiliation(s)
- Elouise K Bacon
- Equine Genetics and Genomics Group, School of Life and Environmental Sciences, University of Sydney, Sydney, NSW, Australia.
| | - Callum G Donnelly
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA, 95616, USA
- Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithica, NY, 14850, USA
| | - Rebecca R Bellone
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA, 95616, USA
- Veterinary Genetics Laboratory, School of Veterinary Medicine, University of California, Davis, CA, 95616, USA
| | - Bianca Haase
- School of Veterinary Science, University of Sydney, Sydney, NSW, Australia
| | - Carrie J Finno
- Department of Population Health and Reproduction, School of Veterinary Medicine, University of California, Davis, CA, 95616, USA
| | - Brandon D Velie
- Equine Genetics and Genomics Group, School of Life and Environmental Sciences, University of Sydney, Sydney, NSW, Australia
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Li M, Duan S, Chen H, Zou F, Zhang G, Liu Q, Zhang R, Zeng X, Bai H. A promising and highly sensitive electrochemical platform for the detection of fentanyl and alfentanil in human serum. Mikrochim Acta 2023; 190:414. [PMID: 37749328 DOI: 10.1007/s00604-023-05977-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 08/29/2023] [Indexed: 09/27/2023]
Abstract
A novel electrochemical method has been developed, based on a covalent organic framework (COF) and reduced graphene oxide (rGO), to detect fentanyl and alfentanil. COF nanomaterials with chrysanthemum morphology obtained by solvothermal reaction contain rich active sites for electrochemical catalytic reaction, thus improving the detection performance of the designed sensor. Reduced graphene oxide improves the sensor's sensitivity due to enhanced electron transfer. Under optimized experimental conditions, the fabricated electrode presents a linear range of 0.02 to 7.26 μM for alfentanil and 0.1 to 6.54 μM for fentanyl, with detection limits of 6.7 nM and 33 nM, respectively. In addition, the sensor possesses excellent selectivity, outstanding reproducibility, and acceptable stability. The proposed sensor is feasible for the reliable monitoring of fentanyl and alfentanil in human serum samples, with acceptable reliability and high potential in real-world applications. Finally, the electrochemical characteristic fingerprint of fentanyl is investigated by studying the electrochemical behavior of alfentanil and fentanyl on the electrode surface.
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Affiliation(s)
- Meng Li
- School of Material and Energy, Yunnan University, Kunming, 650091, China
- School of Chemical Science and Engineering, Yunnan University, Kunming, 650091, China
- Yunnan Key Laboratory of Micro/Nano Materials & Technology, Yunnan University, Kunming, 650091, China
| | - Shimeng Duan
- School of Material and Energy, Yunnan University, Kunming, 650091, China
- School of Chemical Science and Engineering, Yunnan University, Kunming, 650091, China
- Yunnan Key Laboratory of Micro/Nano Materials & Technology, Yunnan University, Kunming, 650091, China
| | - Haiou Chen
- School of Material and Energy, Yunnan University, Kunming, 650091, China
- School of Chemical Science and Engineering, Yunnan University, Kunming, 650091, China
- Yunnan Key Laboratory of Micro/Nano Materials & Technology, Yunnan University, Kunming, 650091, China
| | - Fangyuan Zou
- School of Material and Energy, Yunnan University, Kunming, 650091, China
- School of Chemical Science and Engineering, Yunnan University, Kunming, 650091, China
- Yunnan Key Laboratory of Micro/Nano Materials & Technology, Yunnan University, Kunming, 650091, China
| | - Genlin Zhang
- School of Material and Energy, Yunnan University, Kunming, 650091, China
- School of Chemical Science and Engineering, Yunnan University, Kunming, 650091, China
- Yunnan Key Laboratory of Micro/Nano Materials & Technology, Yunnan University, Kunming, 650091, China
| | - Qingju Liu
- School of Material and Energy, Yunnan University, Kunming, 650091, China
- School of Chemical Science and Engineering, Yunnan University, Kunming, 650091, China
- Yunnan Key Laboratory of Micro/Nano Materials & Technology, Yunnan University, Kunming, 650091, China
| | - Ruilin Zhang
- NHC Key Laboratory of Drug Addiction Medicine, School of Forensic Medicine, Kunming Medical University, Kunming, 650050, China.
| | - Xiaofeng Zeng
- NHC Key Laboratory of Drug Addiction Medicine, School of Forensic Medicine, Kunming Medical University, Kunming, 650050, China.
| | - Huiping Bai
- School of Material and Energy, Yunnan University, Kunming, 650091, China.
- School of Chemical Science and Engineering, Yunnan University, Kunming, 650091, China.
- Yunnan Key Laboratory of Micro/Nano Materials & Technology, Yunnan University, Kunming, 650091, China.
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Bacon EK, Donnelly CG, Bellone RR, Finno CJ, Velie BD. Melanocortin‐1 receptor influence in equine opioid sensitivity. EQUINE VET EDUC 2022. [DOI: 10.1111/eve.13661] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Elouise K. Bacon
- Equine Genetics and Genomics Group School of Life and Environmental Sciences University of Sydney Sydney New South Wales Australia
| | - Callum G. Donnelly
- Department of Population Health and Reproduction School of Veterinary Medicine University of California Davis California USA
| | - Rebecca R. Bellone
- Department of Population Health and Reproduction School of Veterinary Medicine University of California Davis California USA
- Veterinary Genetics Laboratory School of Veterinary Medicine University of California Davis California USA
| | - Carrie J. Finno
- Department of Population Health and Reproduction School of Veterinary Medicine University of California Davis California USA
| | - Brandon D. Velie
- Equine Genetics and Genomics Group School of Life and Environmental Sciences University of Sydney Sydney New South Wales Australia
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Bowen IM, Redpath A, Dugdale A, Burford JH, Lloyd D, Watson T, Hallowell GD. BEVA primary care clinical guidelines: Analgesia. Equine Vet J 2020; 52:13-27. [PMID: 31657050 DOI: 10.1111/evj.13198] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Accepted: 10/18/2019] [Indexed: 02/07/2023]
Abstract
Primary care guidelines provide a reference point to guide clinicians based on a systematic review of the literature, contextualised by expert clinical opinion. These guidelines develop a modification of the GRADE framework for assessment of research evidence (vetGRADE) and applied this to a range of clinical scenarios regarding use of analgesic agents. Key guidelines produced by the panel included recommendations that horses undergoing routine castration should receive intratesticular local anaesthesia irrespective of methods adopted and that horses should receive NSAIDs prior to surgery (overall certainty levels high). Butorphanol and buprenorphine should not be considered appropriate as sole analgesic for such procedures (high certainty). The panel recommend the continuation of analgesia for 3 days following castration (moderate certainty) and conclude that phenylbutazone provided superior analgesia to meloxicam and firocoxib for hoof pain/laminitis (moderate certainty), but that enhanced efficacy has not been demonstrated for joint pain. In horses with colic, flunixin and firocoxib are considered to provide more effective analgesia than meloxicam or phenylbutazone (moderate certainty). Given the risk of adverse events of all classes of analgesic, these agents should be used only under the control of a veterinary surgeon who has fully evaluated a horse and developed a therapeutic, analgesic plan that includes ongoing monitoring for such adverse events such as the development of right dorsal colitis with all classes of NSAID and spontaneous locomotor activity and potentially ileus with opiates. Finally, the panel call for the development of a single properly validated composite pain score for horses to allow accurate comparisons between medications in a robust manner.
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Affiliation(s)
- I M Bowen
- Oakham Veterinary Hospital/University of Nottingham, Sutton Bonington, Loughborough, UK
| | - A Redpath
- Oakham Veterinary Hospital/University of Nottingham, Sutton Bonington, Loughborough, UK
| | - A Dugdale
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington, Loughborough, UK
| | - J H Burford
- School of Veterinary Medicine and Science, University of Nottingham, Sutton Bonington, Loughborough, UK
| | - D Lloyd
- ChesterGates Veterinary Specialists, Chester, UK
| | - T Watson
- Waterlane Equine Vets, Stroud, UK
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Crabtree NE, Mochal-King CA, Sloan PB, Eddy AL, Wills RW, Meredith AN, Fontenot RL. Synovial butorphanol concentrations and mechanical nociceptive thresholds after intravenous regional limb perfusion in standing sedated horses. Vet Surg 2019; 48:1473-1482. [PMID: 31513300 DOI: 10.1111/vsu.13309] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Revised: 07/05/2019] [Accepted: 07/24/2019] [Indexed: 12/13/2022]
Abstract
OBJECTIVE To determine synovial butorphanol concentrations and mechanical nociceptive threshold (MNT) changes after butorphanol intravenous regional limb perfusion (IVRLP). STUDY DESIGN Experimental ANIMALS: Six adult horses. METHODS Cephalic IVRLP was performed with 10 mg butorphanol in sedated horses with a wide rubber tourniquet and a total volume of 30 mL. Radiocarpal synovial fluid and serum concentrations along with MNT were evaluated prior to and 0.5, 1, 2, 4, and 6 hours after IVRLP. Butorphanol concentrations were determined with liquid chromatography coupled to tandem mass spectrometry positive electrospray ionization. RESULTS Butorphanol concentrations reached mean (SD) peak concentrations of 9.47 ng/mL (±12.00) in synovial fluid and 3.89 ng/mL (3.29) in serum 30 minutes after IVRLP. Concentrations remained above baseline for 4 hours in synovial fluid (P ≤ .017) and for 2 hours in serum (P ≤ .016). The only difference in MNT was detected 1 hour after IVRLP, when MNT were higher in controls than in treated horses (P = .047). CONCLUSION Butorphanol IVRLP seemed well tolerated and resulted in measurable levels of butorphanol in the radiocarpal synovial fluid of five of six horses. CLINICAL SIGNIFICANCE Intravenous regional limb perfusion appears to be a viable alternative to administer butorphanol, but additional investigation is required to evaluate the dose and local concentrations required for analgesia.
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Affiliation(s)
- Naomi E Crabtree
- Department of Clinical Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi
| | - Cathleen A Mochal-King
- Department of Clinical Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi
| | - Pearce B Sloan
- Department of Clinical Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi
| | - Alison L Eddy
- Department of Clinical Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi
| | - Robert W Wills
- Department of Pathobiology and Population Medicine, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi
| | - Ashley N Meredith
- Mississippi State Chemical Laboratory, Mississippi State University, Mississippi State, Mississippi
| | - Robin L Fontenot
- Department of Clinical Sciences, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi
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