Prosiectau fesul blwyddyn
Crynodeb
Mycobacterium avium subspecies paratuberculosis (MAP) is the causative organism of Johne's Disease, a chronic intestinal infection of ruminants. Infected cows begin shedding MAP within the asymptomatic, subclinical stage of infection before clinical signs, such as weight loss, diarrhoea and reduced milk yields develop within the clinical stages of disease. Herein, we examine the milk metabolomic profiles of naturally MAP-infected Holstein-Friesian cows. The study used biobanked milk samples which were collected 73.4 ± 3.79 (early lactation) and 143 ± 3.79 (mean ± SE) (mid-lactation) days post-calving from 5 MAP-infected and 5 control multiparous cows. The milk metabolome was assessed using flow infusion electrospray high-resolution mass spectrometry (FIE-HRMS) for sensitive, non-targeted metabolite fingerprinting. Metabolite fingerprinting assessments using partial least squares discriminate analyses (PLS-DA) indicated that lactation stage was a larger source of variation than MAP status. Examining each lactation stage separately for changes associated to MAP-infection status identified 45 metabolites, 33 in early lactation and 12 in mid-lactation, but only 6 metabolites were targeted in both stages of lactation. Pathway enrichment analysis suggested that MAP affected the malate-aspartate shuffle during early lactation. Pearson's correlation analysis indicated relationships between milk lactose concentrations in mid-lactation and 6 metabolites that were tentatively linked to MAP-infection status. The targeted metabolites were suggestive of wider changes in the bioenergetic metabolism that appear to be an acceleration of the effects of progressing lactation in healthy cows. Additionally, milk lactose concentrations suggest that MAP reduces the availability of lactose derivatives.
Iaith wreiddiol | Saesneg |
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Tudalennau (o-i) | 354-363 |
Nifer y tudalennau | 10 |
Cyfnodolyn | Research in Veterinary Science |
Cyfrol | 152 |
Dyddiad ar-lein cynnar | 12 Medi 2022 |
Dynodwyr Gwrthrych Digidol (DOIs) | |
Statws | Cyhoeddwyd - 20 Rhag 2022 |
Ôl bys
Gweld gwybodaeth am bynciau ymchwil 'Metabolomic changes in lactating multiparous naturally MAP-infected Holstein-Friesian dairy cows suggest changes in mitochondrial energy pathways'. Gyda’i gilydd, maen nhw’n ffurfio ôl bys unigryw.Setiau Data
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Metabolomic changes in lactating multiparous naturally MAP-infected Holstein-Friesian dairy cows highlight changes in mitochondrial energy pathways
Taylor, E., Mendeley Data, 06 Hyd 2021
Dangosydd eitem ddigidol (DOI): 10.17632/2gsj2krvzb.1
Set ddata
Ffeil
Prosiectau
- 1 Wedi Gorffen
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Using omic approaches to improve the detection of paratuberculosis in cattle herds
Mur, L. (Prif Ymchwilydd) & Taylor, E. (Cyd-ymchwilydd)
24 Medi 2018 → 23 Medi 2021
Prosiect: Ymchwil a ariannwyd yn fewnol