Activity of GH/IGF-I axis in trauma and septic patients during artificial nutrition: different behavior patterns?
The aim of this study was to compare several parameters of GH/IGF-I axis activity in septic and trauma patients during Intensive Care Unit (ICU) stay. To this goal, 13 patients with sepsis (SEP) and 16 with trauma (TRA) were studied. Thirty-three adult subjects (AS) were studied as controls. Serum IGF-I and -II, IGFBP-1, -2 and -3, GH and GHBP levels were studied on day 1, 3, 5 and 7 after ICU admission, during comparable artificial nutrition in SEP and TRA and basally in AS. In 5 patients with SEP and 6 with TRA, the GH response to GHRH was evaluated on day 3. On ICU day 1, IGF-I and -II and IGFBP-3 in SEP were lower (p<0.05) than in TRA which, in turn, were lower (p<0.01) than in AS. IGF-I increased (p<0.05) both in SEP and TRA, but, on ICU day 7, those in SEP persisted lower than in TRA, which became similar to those in AS. IGF-II levels increased (p<0.05) in SEP only, persisting lower (p<0.05) than in TRA. On ICU day 1, GH in SEP and TRA were similar and did not vary until day 7, overlapping those in AS. The GH response to GHRH in SEP and TRA was similar and lower (p<0.01) than in AS. These findings indicate that IGF-I activity is impaired more in septic than in trauma patients. Reduced IGF-I activity probably reflects peripheral GH resistance though basal and GHRH-induced GH levels were not increased in these conditions.
Pittoni
G
G
Institute of Anesthesiology and Intensive Care, University of Padova, Italy.
Gallioi
G
G
Zanello
M
M
Gianotti
L
L
Boghen
M F
MF
Colombo
S
S
Broglio
F
F
Santoro
C
C
Davià
G
G
Papini
M G
MG
Destefanis
S
S
Minuto
F
F
Miola
C
C
Ghigo
E
E
D000328:Adult; D000368:Aged; D002352:Carrier Proteins / Q000097:blood; D003422:Critical Care; D016638:Critical Illness; D005260:Female; D013007:Growth Hormone-Releasing Hormone; D019382:Human Growth Hormone / Q000097:blood*; D006801:Humans; D018970:Insulin-Like Growth Factor Binding Protein 1 / Q000097:blood; D018971:Insulin-Like Growth Factor Binding Protein 2 / Q000097:blood; D018972:Insulin-Like Growth Factor Binding Protein 3 / Q000097:blood; D007334:Insulin-Like Growth Factor I / Q000032:analysis*; D007335:Insulin-Like Growth Factor II / Q000032:analysis; D008297:Male; D008875:Middle Aged; D018529:Nutritional Support; D011228:Prealbumin / Q000032:analysis; D011446:Prospective Studies; D018805:Sepsis / Q000503:physiopathology*; D012709:Serum Albumin / Q000032:analysis; D013997:Time Factors; D014947:Wounds and Injuries / Q000503:physiopathology*
D002352:Carrier Proteins; D018970:Insulin-Like Growth Factor Binding Protein 1; D018971:Insulin-Like Growth Factor Binding Protein 2; D018972:Insulin-Like Growth Factor Binding Protein 3; D011228:Prealbumin; D012709:Serum Albumin; D019382:Human Growth Hormone; D007334:Insulin-Like Growth Factor I; D007335:Insulin-Like Growth Factor II; D013007:Growth Hormone-Releasing Hormone; C051815:somatotropin-binding protein