Table 7.
Effect of storage conditions on relative sphingolipid levels in human blood samples.
| Freeze-Thaw Cycles | Storage (Months) | |||||
|---|---|---|---|---|---|---|
| 0 | 2 | 4 | 6 | 0 | 18 | |
| C16Cer | 100 ± 13.8 | 105 ± 17.3 | 98.9 ± 23.6 | 107 ± 18.8 | 100 ± 35.3 | 92.6 ± 20.6 |
| C18Cer | 100 ± 24.7 | 103 ± 24.3 | 93.9 ± 21.3 | 106 ± 31.0 | 100 ± 26.5 | 117 ± 44.8 |
| C20Cer | 100 ± 21.4 | 106 ± 26.5 | 98.3 ± 17.5 | 109 ± 24.5 | 100 ± 27.9 | 89.9 ± 30.6 |
| C24Cer | 100 ± 33.1 | 108 ± 34.9 | 97.2 ± 34.3 | 110 ± 32.6 | 100 ± 28.7 | 96.9 ± 38.0 |
| C24:1Cer | 100 ± 27.1 | 106 ± 26.1 | 97.1 ± 21.3 | 108 ± 28.4 | 100 ± 21.6 | 98.6 ± 30.4 |
| C24dhCer | 100 ± 28.0 | 100 ± 29.3 | 93.2 ± 33.7 | 106 ± 32.2 | 100 ± 35.4 | 77.0 ± 37.3 |
| C24:1dhCer | 100 ± 26.0 | 105 ± 26.0 | 99.3 ± 28.9 | 113 ± 28.9 | 100 ± 25.0 | 97.1 ± 35.8 |
Mean (in %) ± SD; EDTA; n = 4 (Storage: C18Cer: n = 3); Repeated ANOVA (Bonferroni post test) or Paired t test.