An HPLC-MS/MS method for the quantification of heat stress-related milk metabolites in milk from Holstein-Friesian cross-bred cows in Tanzania
The main objective of this study was to develop and validate a high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) method for the determination and quantification of three metabolites in raw milk samples: creatinine, citrate, and β-hydroxybutyrate (3-BHB). The effect of the...
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South African Society for Animal Science
2025-03-01
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| Series: | South African Journal of Animal Science |
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| Online Access: | https://www.sajas.co.za/article/view/23257 |
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| author | V Habimana AS Nguluma ZC Nziku CC Ekine-Dzivenu G Morota R Mrode SW Chenyambuga |
| author_facet | V Habimana AS Nguluma ZC Nziku CC Ekine-Dzivenu G Morota R Mrode SW Chenyambuga |
| author_sort | V Habimana |
| collection | DOAJ |
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The main objective of this study was to develop and validate a high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) method for the determination and quantification of three metabolites in raw milk samples: creatinine, citrate, and β-hydroxybutyrate (3-BHB). The effect of the temperature-humidity index (THI) on the concentrations of these metabolites was also investigated. The study used 29 Holstein-Friesian × Tanzanian Shorthorn Zebu cross-bred cows of two genotypes from the Tanzania Livestock Research Institute in Tanga, Tanzania. The cows were in their second or third parity and their second or third month of lactation. Chromatographic separation of the three metabolites was performed using a Supelco column (150 × 2.1 mm, 3 µm), with a mobile phase consisting of 1% formic acid and 10 mM ammonium formate in high-performance liquid chromatography (HPLC) water, and 1% formic acid in methanol. Creatinine, citrate, and 3-BHB were measured at 2.13, 2.33, and 2.48 minutes of run time, respectively. The calibration curves were linear and ranged from 0.0025 to 0.64 µg/mL for creatinine, 1.25 to 3.20 µg/mL for citrate, and 0.25 to1.28 µg/mL for 3-BHB. The creatinine (8.44–5.40 µg/mL), citrate (36.54–33.93 µg/mL), and 3-BHB (12.07–8.96 µg/mL) concentrations decreased with an increase in THI from 77 to 83. However, these results were complicated by significant interactions between the THI and the genotype, parity, and months in lactation. In conclusion, this study demonstrates the potential of an HPLC-MS/MS method to estimate creatinine, citrate, and 3-BHB concentrations in milk samples, and shows that heat stress affects the concentrations of these milk metabolites.
Submitted 5 November 2024; Accepted 5 February 2025; Published March 2025
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Significance of research to South African science
The article represents a significant advancement for food safety science and veterinary pharmacology in South Africa. By developing and validating a rapid, sensitive, and cost-effective method for detecting fluoroquinolone residues in poultry meat, the study directly supports the country's capacity to monitor antibiotic residues and enforce maximum residue limits (MRLs). This is critical for protecting public health, ensuring compliance with international export standards, and addressing antimicrobial resistance (AMR) - a growing concern in both human and animal health. The locally relevant methodology also strengthens South Africa’s analytical infrastructure and contributes to regional leadership in residue analysis and food quality assurance.
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| format | Article |
| id | doaj-art-bcbbfffda73c41a3afa5ec8d2cadccdb |
| institution | DOAJ |
| issn | 0375-1589 2221-4062 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | South African Society for Animal Science |
| record_format | Article |
| series | South African Journal of Animal Science |
| spelling | doaj-art-bcbbfffda73c41a3afa5ec8d2cadccdb2025-08-20T03:09:43ZengSouth African Society for Animal ScienceSouth African Journal of Animal Science0375-15892221-40622025-03-0155310.4314/sajas.v55i3.07An HPLC-MS/MS method for the quantification of heat stress-related milk metabolites in milk from Holstein-Friesian cross-bred cows in TanzaniaV Habimana0https://orcid.org/0000-0003-2157-9456AS Nguluma1https://orcid.org/0000-0002-1453-982XZC Nziku2https://orcid.org/0000-0001-7414-7329CC Ekine-Dzivenu3https://orcid.org/0000-0002-8526-435XG Morota4https://orcid.org/0000-0002-3567-6911R Mrode5https://orcid.org/0000-0003-1964-5653SW Chenyambuga6https://orcid.org/0000-0003-1045-0083Sokoine University of AgricultureSokoine University of AgricultureTanzania Livestock Research Institute (TALIRI)International Livestock Research InstituteThe University of TokyoInternational Livestock Research InstituteSokoine University of Agriculture The main objective of this study was to develop and validate a high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) method for the determination and quantification of three metabolites in raw milk samples: creatinine, citrate, and β-hydroxybutyrate (3-BHB). The effect of the temperature-humidity index (THI) on the concentrations of these metabolites was also investigated. The study used 29 Holstein-Friesian × Tanzanian Shorthorn Zebu cross-bred cows of two genotypes from the Tanzania Livestock Research Institute in Tanga, Tanzania. The cows were in their second or third parity and their second or third month of lactation. Chromatographic separation of the three metabolites was performed using a Supelco column (150 × 2.1 mm, 3 µm), with a mobile phase consisting of 1% formic acid and 10 mM ammonium formate in high-performance liquid chromatography (HPLC) water, and 1% formic acid in methanol. Creatinine, citrate, and 3-BHB were measured at 2.13, 2.33, and 2.48 minutes of run time, respectively. The calibration curves were linear and ranged from 0.0025 to 0.64 µg/mL for creatinine, 1.25 to 3.20 µg/mL for citrate, and 0.25 to1.28 µg/mL for 3-BHB. The creatinine (8.44–5.40 µg/mL), citrate (36.54–33.93 µg/mL), and 3-BHB (12.07–8.96 µg/mL) concentrations decreased with an increase in THI from 77 to 83. However, these results were complicated by significant interactions between the THI and the genotype, parity, and months in lactation. In conclusion, this study demonstrates the potential of an HPLC-MS/MS method to estimate creatinine, citrate, and 3-BHB concentrations in milk samples, and shows that heat stress affects the concentrations of these milk metabolites. Submitted 5 November 2024; Accepted 5 February 2025; Published March 2025 ------------------------------------------------------------------- Significance of research to South African science The article represents a significant advancement for food safety science and veterinary pharmacology in South Africa. By developing and validating a rapid, sensitive, and cost-effective method for detecting fluoroquinolone residues in poultry meat, the study directly supports the country's capacity to monitor antibiotic residues and enforce maximum residue limits (MRLs). This is critical for protecting public health, ensuring compliance with international export standards, and addressing antimicrobial resistance (AMR) - a growing concern in both human and animal health. The locally relevant methodology also strengthens South Africa’s analytical infrastructure and contributes to regional leadership in residue analysis and food quality assurance. https://www.sajas.co.za/article/view/23257citratecreatininemetabolic statustandem mass spectroscopyβ-hydroxybutyrate |
| spellingShingle | V Habimana AS Nguluma ZC Nziku CC Ekine-Dzivenu G Morota R Mrode SW Chenyambuga An HPLC-MS/MS method for the quantification of heat stress-related milk metabolites in milk from Holstein-Friesian cross-bred cows in Tanzania South African Journal of Animal Science citrate creatinine metabolic status tandem mass spectroscopy β-hydroxybutyrate |
| title | An HPLC-MS/MS method for the quantification of heat stress-related milk metabolites in milk from Holstein-Friesian cross-bred cows in Tanzania |
| title_full | An HPLC-MS/MS method for the quantification of heat stress-related milk metabolites in milk from Holstein-Friesian cross-bred cows in Tanzania |
| title_fullStr | An HPLC-MS/MS method for the quantification of heat stress-related milk metabolites in milk from Holstein-Friesian cross-bred cows in Tanzania |
| title_full_unstemmed | An HPLC-MS/MS method for the quantification of heat stress-related milk metabolites in milk from Holstein-Friesian cross-bred cows in Tanzania |
| title_short | An HPLC-MS/MS method for the quantification of heat stress-related milk metabolites in milk from Holstein-Friesian cross-bred cows in Tanzania |
| title_sort | hplc ms ms method for the quantification of heat stress related milk metabolites in milk from holstein friesian cross bred cows in tanzania |
| topic | citrate creatinine metabolic status tandem mass spectroscopy β-hydroxybutyrate |
| url | https://www.sajas.co.za/article/view/23257 |
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