Validation and method comparison of the use of densitometry to quantify monoclonal proteins in canine sera

© 2019 American Society for Veterinary Clinical Pathology.

Bibliographische Detailangaben
Veröffentlicht in:Veterinary clinical pathology. - 1975. - 48 Suppl 1(2019) vom: 30. Okt., Seite 78-87
1. Verfasser: Harris, Adam Dugger (VerfasserIn)
Weitere Verfasser: Rout, Emily, Avery, Anne, Bolte, Denise, Belling-Kelly, Erica, Moore, A Russell
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2019
Zugriff auf das übergeordnete Werk:Veterinary clinical pathology
Schlagworte:Comparative Study Journal Article Validation Study electrophoresis immunoglobulin monoclonal gammopathy radial immunodiffusion Immunoglobulin A Immunoglobulin G Immunoglobulin M mehr... Immunoglobulins gamma-Globulins
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520 |a BACKGROUND: Densitometric quantitation using serum protein electrophoresis (SPE) is used to monitor monoclonal proteins (M-proteins) in human patients but has not been validated in the dog. Serum globulin concentrations, species-specific radial immunodiffusion (RID), and ELISAs are currently used in veterinary medicine 
520 |a OBJECTIVE: We aimed to compare four methods that quantify M-proteins using densitometry and biuret protein (dM-protein) measurements. We also validated the best performing method and compared it with the RID and ELISA methods for measuring canine serum M-protein 
520 |a METHOD: Serum from six normal dogs and 83 serum samples from 46 dogs with confirmed monoclonal gammopathies were used. A spike and recovery experiment with purified monoclonal IgG and IgM, inter-run and intra-run variability, linearity under dilution, and lower limit of detection were performed. Results of commercial canine RID and ELISA kits for total class-specific immunoglobulin were compared with dM-proteins 
520 |a RESULTS: The corrected perpendicular drop gating method had <20% error for IgG/γ-globulin and IgM/β-globulin M-protein quantifications. Linearity (r > .99), intra-run CV (1.1%-2.3%), and inter-run CVs (2.0%-3.5%) were acceptable. Correlation between the RID and densitometry results ranged from r = .25 to r = .88, depending on the class. The RID result was greater than that of the biuret total protein in 26/63 (41%) IgA cases. A panel of IgG, IgA, and IgM RIDs failed to correctly identify an IgM paraproteinemia in 6/6 (100%) cases. Densitometry was not comparable with any other tested method 
520 |a CONCLUSION: Densitometric quantitation is a valid technique for measuring M-proteins in the β- and γ-globulin regions. Immunotyping via RID using the tested kit does not appear to detect IgM. Densitometry is recommended for measuring M-proteins in canine patients 
650 4 |a Comparative Study 
650 4 |a Journal Article 
650 4 |a Validation Study 
650 4 |a electrophoresis 
650 4 |a immunoglobulin 
650 4 |a monoclonal gammopathy 
650 4 |a radial immunodiffusion 
650 7 |a Immunoglobulin A  |2 NLM 
650 7 |a Immunoglobulin G  |2 NLM 
650 7 |a Immunoglobulin M  |2 NLM 
650 7 |a Immunoglobulins  |2 NLM 
650 7 |a gamma-Globulins  |2 NLM 
700 1 |a Rout, Emily  |e verfasserin  |4 aut 
700 1 |a Avery, Anne  |e verfasserin  |4 aut 
700 1 |a Bolte, Denise  |e verfasserin  |4 aut 
700 1 |a Belling-Kelly, Erica  |e verfasserin  |4 aut 
700 1 |a Moore, A Russell  |e verfasserin  |4 aut 
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