Table 4.
Metabolites with differential abundance in heart of fetuses after maternal DCA infusiona
| Metabolite | Fold-Change (DCA/Non-DCA) | FDR-Corrected P Value: DCA Treatmentb | FDR-Corrected P Value: Tissue Locationb | Confidence Scorec |
|---|---|---|---|---|
| Alanine | 0.83 | 3.16E-04 | 9.29E-01 | 4 |
| Lactate | 0.85 | 3.27E-04 | 1.73E-01 | 4 |
| UK3 | 0.84 | 1.35E-03 | 7.56E-01 | NA |
| UK10* | 0.65 | 4.59E-03 | 1.27E-01 | NA |
| UK2 | 1.22 | 5.28E-03 | 2.24E-01 | NA |
| OL2 | 1.19 | 2.04E-02 | 4.79E-01 | NA |
| UK6 | 1.21 | 2.04E-02 | 6.93E-02 | NA |
| OL1 | 1.17 | 2.12E-02 | 8.94E-01 | NA |
| Isobutyryl-carnitine | 1.21 | 2.19E-02 | 8.50E-01 | 2 |
| dl-α-glycerol phosphate | 1.19 | 2.73E-02 | 9.66E-01 | 4 |
| Acetylcarnitine/isobutyryl-carnitine* | 1.23 | 3.24E-02 | 5.19E-04 | 3/2 |
| Fumarate* | 0.72 | 3.25E-02 | 1.04E-04 | 3 |
| Choline* | 1.27 | 3.64E-02 | 8.99E-03 | 4 |
| 1,2-Propanediol | 1.15 | 4.63E-02 | 7.99E-01 | 4 |
| UK1 | 0.90 | 4.63E-02 | 6.15E-01 | NA |
| UK4 | 0.92 | 4.63E-02 | 8.50E-01 | NA |
| UK5 | 1.12 | 5.16E-02 | 8.21E-01 | NA |
| ITP | 1.18 | 5.16E-02 | 7.58E-02 | 3 |
| Glucose/glucose-6-phosphate* | 0.71 | 5.50E-02 | 6.49E-01 | 4/3 |
| OL3 | 0.88 | 5.69E-02 | 8.58E-01 | NA |
aMeasured by NOESYPR and CPMG. Metabolites that are only differentiating on CPMG spectra are labeled by *, metabolites that are differentiating on NOESYPR or NOESYPR + CPMG are not labeled. Fold-changes and P values are calculated from NOESYPR data if not labeled by *.
For non-DCA group, n = 39 tissue samples from 13 animals (control and CORT without DCA administration), for DCA group, n = 48 tissue samples from 16 animals (control DCA and CORT + DCA).
bP for DCA treatment effect in two-way ANOVA (DCA treatment and tissue location). The P values for the interaction (between DCA treatment and tissue location) term are all above 0.05 and are not included in the table.
cConfidence scale is defined as follows: 1) putatively characterized compounds or compound classes, 2) 1 D NMR matches to literature and/or database (BMRB and/or HMDB), 3) HSQC matches on COLMARm, 4) HSQC and HSQC-TOCSY match on COLMARm, and 5) verified by spiking.
UK indicates unknown. OL indicates overlap, OL1: phosphoethanolamine overlaps with serine, confidence scores are 4, 4, respectively, phosphoethanolamine peaks shift ∼0.005 ppm between on HRMAS and on polar extraction spectra; OL2: serine overlaps with glycerophosphocholine, confidence scores are 4, 3, respectively; OL3: pantothenate overlaps with carnitine, confidence scores are 3, 3, respectively.
CORT, cortisol-infused; CPMG, Carr–Purcell–Meiboom–Gill; DCA, sodium dichloroacetate; HRMAS, high-resolution magic angle spinning; HSQC, heteronuclear single-quantum coherence; NOESYPR, nuclear Overhauser effect spectroscopy with water presaturation; TOCSY, total correlation spectroscopy.