Table 3. Concentrations of hormones and cytokines in serum and alveolar lining fluid.

Protein	Molecular weight (kDa)	ALF / serum concentration ratio (%)	P value
Ghrelin (pg/mL)	3.37	553 (135–1306)	<0.001
Resistin (pg/mL)	12.5	256 (124–810)	<0.001
Insulin (pg/mL)	5.8	242 (131–526)	0.019
Visfatin (pg/mL)	52	192 (0–547)	0.037
GLP-1 (pg/mL)	3.35	171 (105–370)	0.002
Glucagon (pg/mL)	3.49	102 (55–188)	0.71
MCP-1 (pg/mL)	11.0	90 (34–168)	0.84
Leptin (pg/mL)	16	14.2 (6.7–44)	<0.001
C-reactive protein (ng/mL)	115	2.13 (0.65–3.74)	<0.001
Adipsin (ng/mL)	28	1.65 (1.26–5.04)	<0.001
PAi-1 (ng/mL)	43	0.55 (0.19–0.88)	<0.001
Adiponectin (ng/mL)	28	0.22 (0.12–0.47)	<0.001
ApoE (μg/mL)	34	0.07 (0.04–0.22)	<0.001
ApoA-I (μg/mL)	28	0.04 (0.01–0.1)	<0.001
ApoA-II (μg/mL)	11.2	0.03 (0–0.11)	<0.001
ApoB (μg/mL)	512	0.02 (0–0.36)	<0.001
ApoC-III (μg/mL)	8.7	0.01 (0.01–0.03)	<0.001
GIP (pg/mL)	5.1	0 (0–42)	0.002
ApoC-II (μg/mL)	11.2	0 (0–0.01)	<0.001

Proteins are ranked from highest to lowest ALF / serum concentration, after adjustment for dilution during the lavage procedure. Data are median (Q1, Q3). P-value is for the difference between median concentrations in serum and median concentrations in ALF, from Wilcoxon′s signed-rank test. Proteins are sorted from the most to the least concentrated in ALF relative to serum.