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Table 4 diagnostic biomarkers for PA and MMA that are not significantly altered during AMD

From: Understanding acute metabolic decompensation in propionic and methylmalonic acidemias: a deep metabolic phenotyping approach

AnalyteMatrixPROPIONIC ACIDURIAMETHYLMALONIC ACIDURIA
No AMDAMDP-valueNo AMDAMDP-value
Median + SD [Min-Max] (N)Median + SD [Min-Max] (N)Median + SD [Min-Max] (N)Median + SD [Min-Max] (N)
Targeted metabolic assays
 PropionylcarnitinePlasma54.4 + 19.6 [23.0–99.5] (34)49.7 + 25.6 [24.0–128.0] (23)NS21.0 + 21.7 [2.7–83.7] (68)78.0 + 81.0 [14.8–175.5] (3)NS
 GlycinePlasma1381 + 362 [350–1962] (73)1160 + 514 [265–2051] (35)NS492 + 369 [168–1916] (77)334 + 152 [226–441] (2)NS
 Methylcitric acidPlasma 49.5 + 14.8 [24.9–78.9] (12)NS2.2 + 2.8 [1.0–10.9] (11) NS
 Methylcitric acidUrine697 + 383 [425–968] (3) NS  NS
 3-Hydroxy-propionic acidUrine232 + 99 [89–349] (10)738 + 355 [184–1534] (13)NS13.0 + 18.6 [0. – 86.0] (57)9.5 + 76.8 [4.0–161.0] (4)NS
 MethylmalonylcarnitinePlasma   7.6 + 7.7 [3.4–20.2] (5) NS
 Methylmalonic acidPlasma   74 + 346 [3–1327] (52) NS
 Methylmalonic acidUrine   727 + 4651 [64–21,587] (174)4062 + 3200 [536–9044] (7)NS
 AcetylcarnitinePlasma10.1 + 7.5 [1.6–42.2] (34)10.9 + 9.5 [1.3–43.9] (23)NS9.2 + 5.8 [2.1–29.9] (68)12.6 + 24.4 [3.9–49.9] (3)NS
Untargeted DI-HRMS
 PropionylcarnitinePlasma12.0 + 80.8 [− 2.8–363] (23)272 + 193 [1.5–730] (15)NS37.9 + 171 [− 1.4–684] (61)596 + 835 [5.7–1186] (2)NS
 GlycinePlasma9.5 + 4.8 [− 2.4–18.5] (23)4.9 + 4.1 [− 0.4–14.7 (15)NS1.8 + 2.2 [− 1.1–8.5] (61)2.7 + 3.0 [0.5–4.8] (2)NS
 2-Methylcitric acid (3 isomers)Plasma57.4 + 43.1 [− 1.8–147] (23)93.7 + 31.4 [30.4–139] (15)NS9.0 + 9.5 [− 0.6–41.3] (61)41.1 + 27.0 [22.1–60.2] (2)NS
 Propionylglycine (9 isomers)Plasma28.5 + 29.3 [− 3.0–91.1] (23)80.6 + 50.1 [4.0–177.1] (15)NS1.6 + 3.1 [− 2.3–10.4] (61)5.8 + 5.3 [2.0–9.6] (2)NS
 Methylmalonic acid (3 isomers)Plasma   25.3 + 77.5 [− 0.0–376] (61)150 + 175 [26.3–274] (2)NS
 MethylmalonylcarnitinePlasma   2.4 + 9.1 [− 2.3–29.7] (61)22.9 + 31.7 [0.4–45.3] (2)NS
  1. Results of targeted metabolic assays in plasma are presented in μmol/L, results of targeted metabolic assays in urine are presented in mmol/mol creatinine. All p-values were adjusted according to the Bonferroni method. A p-value < 0.05 was considered statistically significant. Abbreviations DI-HRMS direct-infusion high-resolution mass spectrometry, Max maximum value, Min minimum value, (N) number of samples, NS not significant, P p-value, SD standard deviation