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. 2014 May 6;9(5):e96735. doi: 10.1371/journal.pone.0096735

Table 2. Identification of plasma metabolites of normotensive and prehypertensive subjects.

Identity Formula Exact Mass Mass Error (mDa) Normalized Peak Intensities Fold Changea P P′ P″ VIP
[M + H]+ (M + H) (mDa) Normotensive Group (n = 53) Prehypertensive Group (n = 53)
L-Leucine C6H13NO2 132.1025 −1.3 3,676,275±105,146 3,988,998±96,549 1.09 0.031 0.055 0.248 2.045
L-Phenylalanine C9H11NO2 166.0868 −1.4 2,247,548±54,466 2,415,093±58,200 1.07 0.038 0.157 0.404 1.079
L-Tryptophan C11H12N2O2 205.0977 −1.3 1,572,767±57,695 1,760,331±62,565 1.12 0.030 0.100 0.187 1.225
Palmitic amide C16H33NO 256.2640 −2.1 711,550±97,369 703,228±82,904 0.99 0.948 0.853 0.543 1.156
Oleamide C18H35NO 282.2797 −2.2 4,551,082±418,609 4,714,739±407,173 1.04 0.780 0.760 0.621 4.818
LysoPC (14:0) C22H46NO7P 468.3090 −3.6 261,210±14,207 413,695±18,650 1.58 <0.001 <0.001 <0.001 1.028
LysoPC (16:1) C24H48NO7P 494.3247 −3.3 551,486±21,985 911,147±30,487 1.65 <0.001 <0.001 <0.001 2.471
LysoPC (16:0) C24H50NO7P 496.3403 −3.6 9,219,069±155,236 11,815,774±183,606 1.28 <0.001 <0.001 <0.001 17.499
LysoPC (18:2) C26H50NO7P 520.3403 −4.1 3,670,567±113,737 4,603,096±140,602 1.25 <0.001 <0.001 <0.001 6.010
LysoPC (18:1) C26H52NO7P 522.3560 −4.6 3,256,978±88,919 4,299,302±103,385 1.32 <0.001 <0.001 <0.001 6.867
LysoPC (18:0) C26H54NO7P 524.3716 −4.5 4,354,018±129,401 5,339,069±144,196 1.23 <0.001 <0.001 0.001 5.852
LysoPC (20:5) C28H48NO7P 542.3247 −3.9 437,396±18,626 597,653±28,416 1.37 <0.001 <0.001 0.001 1.088
LysoPC (20:4) C28H50NO7P 544.3403 −4.0 941,761±23,633 1,285,336±35,484 1.36 <0.001 <0.001 <0.001 2.341
LysoPC (20:3) C28H52NO7P 546.3560 −4.3 388,869±19,137 592,630±20,649 1.52 <0.001 <0.001 <0.001 1.396
LysoPC (22:6) C30H50NO7P 568.3403 −4.1 537,886±21,797 807,587±30,720 1.50 <0.001 <0.001 <0.001 1.808
PC (16:0/18:2) C42H80NO8P 758.5700 −5.6 4,847,743±352,770 4,938,788±384,917 1.02 0.862 0.713 0.602 3.297
PC (16:1/20:4) C44H78NO8P 780.5543 −5.0 837,185±114,131 835,170±157,967 1.00 0.992 0.964 0.719 1.534
PC (18:2/18:2) C44H80NO8P 782.5700 −5.1 1,875,687±156,964 2,156,458±157,026 1.15 0.209 0.410 0.528 2.191
PC (18:0/18:2) C44H84NO8P 786.6013 −5.8 1,200,418±89,200 1,347,258±99,846 1.12 0.275 0.473 0.639 1.791
Lactosylceramide (d18:1/12:0) C42H79NO13 806.5630 2.6 1,832,933±253,443 1,436,077±185,650 0.78 0.209 0.269 0.548 2.824

Means ± S.E. aCalculated by the mean intensity of each metabolite from the prehypertensive group divided by the mean intensity of each metabolite from the normotensive group. P-values derived from independent t-tests. P′-values derived from independent t-tests after adjusting for BMI, WHR, smoking, alcohol consumption, total-cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, glucose, free fatty acid, and insulin. P″-values derived from independent t-tests after adjusting for BMI, WHR, smoking, alcohol consumption, total-cholesterol, LDL-cholesterol, HDL-cholesterol, triglyceride, glucose, free fatty acid, insulin, Lp-PLA2, and ox-LDL.