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Comparative physiology of glomerular filtration rate by plasma clearance of exogenous creatinine and exo-iohexol in six different avian species

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Abstract
Early diagnosis of kidney diseases in avian species is limited. Endogenous markers currently used in avian practice are not sensitive enough to identify early kidney failure. Consequently, alternative markers should be evaluated. To be able to evaluate these alternative markers, an accurate marker to estimate the GFR should be validated. This study determined the GFR, measured as clearance of exogenous creatinine and exo-iohexol, in six different bird species, i.e. broiler chickens, laying chickens, turkeys, Muscovy ducks, pigeons and African grey parrots (4/4). To be able to compare the six bird species, normalization to bodyweight (BW) of the GFR was performed, after a good correlation between BW and kidney weight was demonstrated (R-2 = 0.9836). Clearance of exo-iohexol normalized to BW (mL/min/kg) was determined in all bird species, i.e. 3.09 in broiler chickens; 2.57 in laying chickens; 1.94 in turkeys; 1.29 in pigeons; 2.60 in ducks and 1.11 in parrots. However, these results differed significantly with the clearance of exogenous creatinine: 8.41 in broiler chickens; 9.33 in laying chickens; 5.62 in turkeys; 14.97 in pigeons; 17.59 in ducks and 25.56 in parrots 25.56. Iohexol is preferred to measure the GFR, since it is not prone to tubular reabsorption nor secretion.
Keywords
RENAL-FUNCTION, ENDO-IOHEXOL, KIDNEY, INJECTION, EXCRETION

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MLA
Gasthuys, Elke, et al. “Comparative Physiology of Glomerular Filtration Rate by Plasma Clearance of Exogenous Creatinine and Exo-Iohexol in Six Different Avian Species.” SCIENTIFIC REPORTS, vol. 9, 2019.
APA
Gasthuys, E., Montesinos, A., Caekebeke, N., Devreese, M., De Baere, S., Ardiaca, M., … Antonissen, G. (2019). Comparative physiology of glomerular filtration rate by plasma clearance of exogenous creatinine and exo-iohexol in six different avian species. SCIENTIFIC REPORTS, 9.
Chicago author-date
Gasthuys, Elke, Andrés Montesinos, Nele Caekebeke, Mathias Devreese, Siegrid De Baere, Maria Ardiaca, Dominique Paepe, Siska Croubels, and Gunther Antonissen. 2019. “Comparative Physiology of Glomerular Filtration Rate by Plasma Clearance of Exogenous Creatinine and Exo-Iohexol in Six Different Avian Species.” SCIENTIFIC REPORTS 9.
Chicago author-date (all authors)
Gasthuys, Elke, Andrés Montesinos, Nele Caekebeke, Mathias Devreese, Siegrid De Baere, Maria Ardiaca, Dominique Paepe, Siska Croubels, and Gunther Antonissen. 2019. “Comparative Physiology of Glomerular Filtration Rate by Plasma Clearance of Exogenous Creatinine and Exo-Iohexol in Six Different Avian Species.” SCIENTIFIC REPORTS 9.
Vancouver
1.
Gasthuys E, Montesinos A, Caekebeke N, Devreese M, De Baere S, Ardiaca M, et al. Comparative physiology of glomerular filtration rate by plasma clearance of exogenous creatinine and exo-iohexol in six different avian species. SCIENTIFIC REPORTS. 2019;9.
IEEE
[1]
E. Gasthuys et al., “Comparative physiology of glomerular filtration rate by plasma clearance of exogenous creatinine and exo-iohexol in six different avian species,” SCIENTIFIC REPORTS, vol. 9, 2019.
@article{8640558,
  abstract     = {Early diagnosis of kidney diseases in avian species is limited. Endogenous markers currently used in avian practice are not sensitive enough to identify early kidney failure. Consequently, alternative markers should be evaluated. To be able to evaluate these alternative markers, an accurate marker to estimate the GFR should be validated. This study determined the GFR, measured as clearance of exogenous creatinine and exo-iohexol, in six different bird species, i.e. broiler chickens, laying chickens, turkeys, Muscovy ducks, pigeons and African grey parrots (4/4). To be able to compare the six bird species, normalization to bodyweight (BW) of the GFR was performed, after a good correlation between BW and kidney weight was demonstrated (R-2 = 0.9836). Clearance of exo-iohexol normalized to BW (mL/min/kg) was determined in all bird species, i.e. 3.09 in broiler chickens; 2.57 in laying chickens; 1.94 in turkeys; 1.29 in pigeons; 2.60 in ducks and 1.11 in parrots. However, these results differed significantly with the clearance of exogenous creatinine: 8.41 in broiler chickens; 9.33 in laying chickens; 5.62 in turkeys; 14.97 in pigeons; 17.59 in ducks and 25.56 in parrots 25.56. Iohexol is preferred to measure the GFR, since it is not prone to tubular reabsorption nor secretion.},
  articleno    = {19699},
  author       = {Gasthuys, Elke and Montesinos, Andrés and Caekebeke, Nele and Devreese, Mathias and De Baere, Siegrid and Ardiaca, Maria and Paepe, Dominique and Croubels, Siska and Antonissen, Gunther},
  issn         = {2045-2322},
  journal      = {SCIENTIFIC REPORTS},
  keywords     = {RENAL-FUNCTION,ENDO-IOHEXOL,KIDNEY,INJECTION,EXCRETION},
  language     = {eng},
  pages        = {8},
  title        = {Comparative physiology of glomerular filtration rate by plasma clearance of exogenous creatinine and exo-iohexol in six different avian species},
  url          = {http://dx.doi.org/10.1038/s41598-019-56096-5},
  volume       = {9},
  year         = {2019},
}

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