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Table 1 Carnitine ester concentrations of serum and follicular fluids μmol/L [median (interquartile range)]

From: Acylcarnitine esters profiling of serum and follicular fluid in patients undergoing in vitro fertilization

Analytes

IVF patients

Controls

Serum

Follicular fluid

Serum

 

Median (IQR) N=42

Median (IQR) N=42

Median (IQR) N=18

free carnitine

28.056 (5.358)

27.880 (5.878)

27.416 (5.664)

Total acyl-carnitine

9.088 (1.727)

7.613 (1.887)

8.193 (1.413)

Total carnitine

36.309 (6.382)

35.895 (7.780)

36.298 (5.294)

AC/FC ratio

0.320 (0.079)

0.279 (0.049)

0.294 (0.071)

Total short-chain acylcarnitines

7.827 (1.505)

7.073 (1.760)

7.055 (1.500)

Total medium-chain acylcarnitine

0.688 (0.249)

0.307 (0.103) #

0.600 (0.228)

Total long-chain acylcarnitine

0.343 (0.069)

0.140 (0.033) #

0.338 (0.110)

Short chain acylcarnitines

 

  C2-carnitine

7.470 (1.300)

6.559 (1.740)

6.504 (1.514)

  C3-carnitine

0.183 (0.073)*

0.204 (0.068) #

0.263 (0.090)

  C4-carnitine

0.143 (0.058)*

0.160 (0.073)

0.180 (0.088)

  C5-carnitine

0.053 (0.027)

0.052 (0.013)

0.050 (0.020)

  C5-OH carnitine

0.025 (0.012)*

0.020 (0.007) #

0.033 (0.014)

Medium chain acylcarnitines

 

  C6-carnitine

0.027 (0.010)

0.020 (0.007) #

0.027 (0.007)

  C8-carnitine

0.098 (0.043)

0.053 (0.024) #

0.097 (0.0459

  C8:1-carnitine

0.037 (0.020)

0.030 (0.020)

0.038 (0.016)

  C10-carnitine

0.215 (0.120)

0.070 (0.029) #

0.187 (0.087)

  C10:1-carnitine

0.154 (0.061)

0.070 (0.030) #

0.150 (0.040)

  C12-carnitine

0.057 (0.023)

0.020 (0.006) #

0.050 (0.023)

  C12:1-carnitine

0.066 (0.021)

0.020 (0.010) #

0.063 (0.019)

Long chain acylcarnitines

 

  C14-carnitine

0.023 (0.007)

0.010 (0.003) #

0.022 (0.011)

  C14:1-carnitine

0.053 (0.026)*

0.020 (0.007) #

0.045 (0.016)

  C16-carnitine

0.087 (0.029)

0.040 (0.013) #

0.092 (0.039)

  C18-carnitine

0.032 (0.013)

0.013 (0.007) #

0.037 (0.010)

  C18:1-carnitine

0.092 (0.032)

0.033 (0.013) #

0.080 (0.032)

  C18:2-carnitine

0.053 (0.020)

0.020 (0.007) #

0.055 (0.027)

Dicarboxylic acylcarnitines

   

  C4DC-carnitine

0.030 (0.013)

0.023 (0.010) #

0.028 (0.005)

  C5DC-carnitine

0.086 (0.040)

0.052 (0.017) #

0.082 (0.025)

  1. In the control group no follicular samples were avaiable.
  2. *p<0.05 compared to control.
  3. # p<0.05 compared to control.