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Table 1 Biochemical findings

From: New spastic paraplegia phenotype associated to mutation of NFU1

Glycine

Plasma (μM)

Urines (μM)

CSF (μM)

 

530 (181–293)

3077 (43–173)

43 (1–16)

Redox status

Lactate (mM)

Pyruvate (mM)

Pyruvate/Lactate

Fasting

1 (0.6-1.9)

94 (50–140)

10, 5 (<10)

Post-prandial

2.5 (0.6-1.9)

221 (50–140)

11 (<10)

Mitochondrial enzymatic activities

Muscle

Fibroblasts

CI

9 (9–13)

NA

CII

6 (20–42)

4, 11-19

CIII

67 (61–132)

60 (33–67)

CIV

59 (81–171)

51 (41–81)

PDHc

NA

98 (1372–3104)

CS

34 (76–140)

42 (31–65)

CIV/CS

1.74 (1.1-1.9)

1.21 (0.9-1.6)

CIV/CII

9.83 (3.4-6.1)

12.75 (2.7-5.3)

CIV/CI

6.56 (10.5-20.9)

NA

CII/CS

0.18 (0.25-0.41)

0.10 (0.24-0.38)

AKGDH

5.4 (4–9)

0.3 (4–9)

  1. Concentration of lactate, pyruvate and glycine in body fluids and mitochondrial enzymatic activities at 27 years of age. Abnormal concentrations are highlighted in bold. Normal values in brackets. CSF = cerebrospinal fluid, CS = citrate synthase, CI = complex I, CII = complex II, CIV = complex IV, PDHc = pyruvate dehydrogenase complex (PDHc) and AKGDH = α-ketoglutarate dehydrogenase.