+------------OBJ:V-N-----------+                         
       |         +-----MOD_ATT:N-N----+----COMP:N-N(of)---+     
 +SUBJ:+         |         +MOD_ATT:N-+           +MOD_ATT+     
 |     |         |         |          |           |       |     
 4 __NODE__ [__NODE__] decreases expression of plasma __NODE__ .
SUBJ:V-N (__NODE__,4)
OBJ:V-N (__NODE__,expression)
MOD_ATT:N-N (expression,[__NODE__])
MOD_ATT:N-N (expression,decrease)
COMP:N-N(of) (expression,__NODE__)
MOD_ATT:N-N (__NODE__,plasma)