+-----COMP:N-N(of)-----+      
     +SUBJ:+--OBJ:V-N-+            +MOD_ATT:N+      
     |     |          |            |         |      
 IGF 1 increases regulation of __NODE__ metabolism .
SUBJ:V-N (increase,1)
OBJ:V-N (increase,regulation)
COMP:N-N(of) (regulation,metabolism)
MOD_ATT:N-ADJ (metabolism,__NODE__)