Table 2.

Concentration (pg/μg protein) of different cytokines in keratoconus keratocyte cultures twenty-four hours after treatment.

	Keratocytes	Keratocytes + riboflavin	Keratocytes + 370 nm	Keratocytes + riboflavin + 370 nm	* P value	** P value	*** P value
FGFb	1.1 ± 0.36	2.26 ± 1.3	1.09 ± 0.36	2.88 ± 2.53	0.12	0.75	0.3
HGF	3.94 ± 0.8	4.39 ± 0.77	3.72 ± 0.26	4.28 ± 0.71	0.35	0.35	0.6
TGFβ1	4.66 ± 0.1	4.62 ± 0.46	4.62 ± 0.4	4.43 ± 0.44	0.6	0.92	0.12
VEGF	12.75 ± 2.01	16.02 ± 4.82	11.7 ± 2.47	14.92 ± 3.8	0.18	0.35	0.25
KGF	n.d.	n.d.	n.d.	n.d.	n/a	n/a	n/a
IL-1β	n.d.	n.d.	n.d.	n.d.	n/a	n/a	n/a
IL-6	0.31 ± 0.16	0.45 ± 0.26	0.29 ± 0.17	0.37 ± 0.15	0.53	0.6	0.75
IL-8	8.95 ± 2.64	8.11 ± 2.41	9.43 ± 2.79	7.52 ± 1.59	0.47	0.92	0.35

Values indicate mean ± SD.

  ^* P values indicate the difference between “keratocytes” versus “keratocytes + 370 nm” groups (Mann-Whitney U test).

  ^** P values indicate the difference between “keratocytes” versus “keratocytes + riboflavin” groups (Mann-Whitney U test).

  ^*** P values indicate the difference between “keratocytes” versus “keratocytes + riboflavin + 370 nm” groups (Mann-Whitney U test).

n.d. = not detectable.

n/a = not applicable.