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MB Sample ID: SA257072
| Local Sample ID: | 9908_Calving_Met |
| Subject ID: | SU002657 |
| Subject Type: | Mammal |
| Subject Species: | Bos taurus |
| Taxonomy ID: | 9913 |
| Weight Or Weight Range: | 700 kg |
| Gender: | Female |
| Animal Housing: | Free-stalls |
| Animal Feed: | TMR |
Select appropriate tab below to view additional metadata details:
Subject:
| Subject ID: | SU002657 |
| Subject Type: | Mammal |
| Subject Species: | Bos taurus |
| Taxonomy ID: | 9913 |
| Weight Or Weight Range: | 700 kg |
| Gender: | Female |
| Animal Housing: | Free-stalls |
| Animal Feed: | TMR |
Factors:
| Local Sample ID | MB Sample ID | Factor Level ID | Level Value | Factor Name |
|---|---|---|---|---|
| 9908_Calving_Met | SA257072 | FL032794 | Met | Group |
| 9908_Calving_Met | SA257072 | FL032794 | Calving | Time |
| 9908_Calving_Met | SA257072 | FL032794 | Mult | Parity |
Collection:
| Collection ID: | CO002650 |
| Collection Summary: | All cows had blood collected in the prepartum period (-14 DRP), calving (first 24h after calving), and at diagnosis (day of metritis diagnosis). Blood was sampled from the jugular vein using a 20-gauge x 2.54-cm needle and 10-mL evacuated tube containing lithium heparin (Vacutainer, Becton, Dickinson and Company, Franklin Lakes, NJ, USA). After collection, the blood tubes were placed on ice and transported to the laboratory within 2 hours. Once in the laboratory, the blood tubes were centrifuged at 4000 g, 4 °C, for 10 min, and the plasma was stored at -80 oC for further characterization of the plasma metabolome. The frozen plasma was submitted to the University of California’s West Coast Metabolomics Center in Davis, CA for metabolome analysis. Samples were analyzed by blinded technicians using untargeted gas chromatography with time-of-flight mass spectrometry (GC-TOF-MS) in a single batch. |
| Sample Type: | Blood (plasma) |
Treatment:
| Treatment ID: | TR002669 |
| Treatment Summary: | This was a case-control study, hence, there were not treatments applied. Cows were self assigned to the groups. Cows that developed metritis were paired with healthy cows by days in milk. |
Sample Preparation:
| Sampleprep ID: | SP002663 |
| Sampleprep Summary: | After collection, the blood tubes were placed on ice and transported to the laboratory within 2 hours. Once in the laboratory, the blood tubes were centrifuged at 4000 g, 4 °C, for 10 min, and the plasma was stored at -80 oC for further characterization of the plasma metabolome. The frozen plasma was submitted to the University of California’s West Coast Metabolomics Center in Davis, CA for metabolome analysis |
Combined analysis:
| Analysis ID | AN004211 |
|---|---|
| Analysis type | MS |
| Chromatography type | GC |
| Chromatography system | Leco Pegasus IV GC |
| Column | Restek Rtx-5Sil MS (30m x 0.25mm, 0.25um) |
| MS Type | EI |
| MS instrument type | GC-TOF |
| MS instrument name | Leco Pegasus IV TOF |
| Ion Mode | POSITIVE |
| Units | peak heights |
Chromatography:
| Chromatography ID: | CH003122 |
| Chromatography Summary: | Data are acquired using the following chromatographic parameters, with more details to be found in Fiehn O. et al. Plant J. 53 (2008) 691–704. Column: Restek corporation Rtx-5Sil MS (30 m length x 0.25 mm internal diameter with 0.25 μm film made of 95% dimethyl/5%diphenylpolysiloxane) Mobile phase: Helium Column temperature: 50-330°C Flow- rate: 1 mL min-1 Injection volume: 0.5 μL Injection: 25 splitless time into a multi-baffled glass liner Injection temperature: 50°C ramped to 250°C by 12°C s-1 Oven temperature program: 50°C for 1 min, then ramped at 20°C min-1 to 330°C, held constant for 5 min. The analytical GC column is protected by a 10 m long empty guard column which is cut by 20 cm intervals whenever the reference mixture QC samples indicate problems caused by column contaminations. We have validated that at this sequence of column cuts, no detrimental effects are detected with respect to peak shapes, absolute or relative metabolite retention times or reproducibility of quantifications. This chromatography method yields excellent retention and separation of primary metabolite classes (amino acids, hydroxyl acids, carbohydrates, sugar acids, sterols, aromatics, nucleosides, amines and miscellaneous compounds) with narrow peak widths of 2–3 s and very good within-series retention time reproducibility of better than 0.2 s absolute deviation of retention times. We use automatic liner exchanges after each set of 10 injections which we could show to reduce sample carryover for highly lipophilic compounds such as free fatty acids. Mass spectrometry parameters are used as follows: a Leco Pegasus IV mass spectrometer is used with unit mass resolution at 17 spectra s-1 from 80-500 Da at - 70 eV ionization energy and 1800 V detector voltage with a 230°C transfer line and a 250°C ion source. |
| Instrument Name: | Leco Pegasus IV GC |
| Column Name: | Restek Rtx-5Sil MS (30m x 0.25mm, 0.25um) |
| Column Temperature: | 50-330 |
| Flow Gradient: | . |
| Flow Rate: | 1 mL min-1 |
| Solvent A: | . |
| Solvent B: | . |
| Chromatography Type: | GC |
MS:
| MS ID: | MS003958 |
| Analysis ID: | AN004211 |
| Instrument Name: | Leco Pegasus IV TOF |
| Instrument Type: | GC-TOF |
| MS Type: | EI |
| MS Comments: | See data acquisition, processing, and reporting in "Methods.pdf" file |
| Ion Mode: | POSITIVE |
| Analysis Protocol File: | Methods_SC.pdf |
