Table 2.

Changes of plasma phosphatidylcholine fatty acids of esophageal cancer patients during chemoradiotherapy.

	Before CRT	After CRT	P valueh
14: 0a	0.22±0.07b	0.21±0.08	NS
16: 0	31.67±1.69	31.02±1.87	NS
16: 1n-7	0.81±0.44	0.70±0.40	0.015
18: 0	13.60±1.58	13.66±1.76	NS
18: 1n-9	12.31±2.22	11.61±2.18	NS
18: 2n-6	19.49±2.67	19.26±3.25	NS
18: 3n-3	0.22±0.08	0.20±0.08	NS
18: 3n-6	0.09±0.06	0.07±0.04	NS
20: 3n-6	2.80±0.63	3.02±0.81	NS
20: 4n-6	10.47±2.14	11.08±2.32	0.036
20: 5n-3	0.72±0.44	0.69±0.24	NS
22: 6n-3	3.34±0.97	4.02±0.91	0.001
∑ SFA	45.51±2.03	44.95±2.41	NS
∑ MFA	15.37±2.76	14.73±2.79	NS
∑ PUFA n-6	33.92±3.32	33.76±5.90	NS
∑PUFA n-3	5.17±1.11	5.72±0.99	0.038
n-6/n-3 ratio	6.844±1.549	6.13±1.515	NS
D9D 16c	0.025±0.014	0.022±0.013	0.009
D9D 18d	0.923±0.239	0.874±0.244	NS
D6De	0.005±0.004	0.004±0.002	NS
D6D+Ef	0.147±0.041	0.163±0.057	NS
D5Dg	3.941±1.267	3.827±1.350	NS

^aShorthand notation of fatty acids – number of carbon atoms: number of double bonds; n – number of carbon atoms from methyl end to the nearest double bond;

^bthe data are presented as a mean ±SD (mol%); ∑ – sum; SFA – saturated fatty acids; MUFA – monounsaturated fatty acids; PUFA n-6 – polyunsaturated fatty acids of n-6 family; PUFA n-3 – polyunsaturated fatty acids of n-3 family. Only relevant fatty acids are presented.

^c16: 1n-7/16: 0 – Δ9 desaturase;

^d18: 1n-9/18: 0 – Δ9 desaturase;

^e18: 3n-6/18: 2n-6 – Δ6 desaturase;

^f20: 3n-6/18: 2n-6 – Δ6 desaturase+elongase;

^g20: 4n-6/20: 3n-6 – Δ5 desaturase;

^hWilcoxon paired test; D9D=SCD1; CRT – chemoradiotherapy.