+---COMP:N-N(of)---+      
     +SUBJ:+--OBJ:V-N--+           +MOD_AT+      
     |     |           |           |      |      
 IGF 1 increases preservation of cell viability .
SUBJ:V-N (increase,1)
OBJ:V-N (increase,preservation)
COMP:N-N(of) (preservation,viability)
MOD_ATT:N-N (viability,cell)