Table 4.

Concentrations of proposed biomarkers in PCa samples with respect to controls.

Biomarkers Proposed	Concentrations in PCa Samples with Respect Controls
	Increasing Trend	Decreasing Trend
Sarcosine	[25,28,29,30,31]	[36,38]
Isoleucine	[33]	[32,39]
Threonine	[33]	[32,39]
Proline	[31,33,36,37,38]	-
Citrulline	[31,33,36,37,38]	-
Homocitrulline	[31,33,36,37,38]	-
Histidine	-	[37,39]
Methylhistidine	-	[37,39]
Serine	-	[32,39]
Methionine	[33]	[39]
Tyrosine	[33]	[32,37,39]
Arginine	[36]	[39]
kynurenic acid	[27]	[38]
Uracil	[27,38]	-
Glutamine	-	[32,39]