Table 5.

Effects of L-theanine administration on the mRNA expression of PLC-γ1, -δ1, and -β1 genes in the liver, spleen, and heart of the rats.

Item	CON	LT	MT	HT	P value
					Linear	Quadratic
Liver
PLC-β1	1.00a	0.32±0.3b	0.45±0.4b	0.52±0.5b	0.062	0.002
PLC-γ1	1.00a	0.12±0.1d	0.51±0.4b	0.39±0.3c	0.007	0.010
PLC-δ1	1.00a	0.15±0.1c	0.62±0.6b	0.35±0.2c	0.055	0.355
Spleen
PLC-β1	1.00b	2.07±1.9a	1.17±0.9ab	0.6±0.3b	0.088	0.588
PLC-γ1	1.00a	0.30±0.2b	0.37±0.2b	0.28±0.2b	<0.0001	<0.0001
PLC-δ1	1.00a	0.31±0.1c	0.55±0.5b	0.34±0.1c	0.0001	0.158
Heart
PLC-β1	1.00c	2.72±1.9b	2.92±1.5b	6.45±2.3a	<0.0001	0.184
PLC-γ1	1.00c	3.1±1.6b	4.93±1.4a	6.04±2.1a	<0.0001	0.015
PLC-δ1	1.00c	6.53±2.0b	7.98±3.5ab	10.1±3.7a	<0.0001	0.002

PLC – Phospholipase C; CON – control group; LT – low-dose L-theanine administration group; MT – middle-dose L-theanine administration group; HT – high-dose L-theanine administration group.

^a–dMeans in the same row not bearing a common superscript letter differ (P<0.05).