Methodological validation of measuring Hanwoo hair cortisol concentration using bead beater and surgical scissors
Different methodologies in hair cortisol extraction may alter the final output. Thus finding the standard methodology according to a laboratory facilities is pivotal. This study was carried out to validate the feasibility of two methods of...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Korean Society of Animal Sciences and Technology
2019-01-01
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| Series: | Journal of Animal Science and Technology |
| Subjects: | |
| Online Access: | http://www.ejast.org/archive/view_article?pid=jast-61-1-41 |
| Summary: | Different methodologies in hair cortisol extraction may alter the final output.
Thus finding the standard methodology according to a laboratory facilities is
pivotal. This study was carried out to validate the feasibility of two methods
of grinding hair for cortisol extraction in Korean native (Hanwoo) cattle. Hair
from nine cattle including mature cows, heifers, and calves were assigned to one
of the following methods for grinding hair; 1) using bead beater (BB) and 2)
using surgical scissors (SS). Hair samples (> 1 g) were harvested from
forehead of each individual twice (first and second measurement) to validate the
results. To improve the accuracy of the obtained data, each sample was
duplicated into two wells during enzyme immunoassay (EIA) analysis. Overall
comparison of hair cortisol concentration (HCC) showed that the data within the
range (out of the range) of standards provided by the EIA kit were 88.9%
(11.1%) and 66.7% (33.3%) for BB compared with SS,
respectively. In the first measurement, application of BB was tended to show
higher (p = 0.056) amount of HCC compared with SS. In
the second measurement application of BB showed higher (p
= 0.0028) amount of HCC compared with SS. Among the cattle, calves showed
higher HCC using BB compared with SS (p < 0.05).
Application of BB in hair grinding methodology for Hanwoo cattle may improve
cortisol extraction in comparison to application of SS method, with more
consistency. Thus, it would be the preferable method to use. |
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| ISSN: | 1598-9429 2055-0391 |