Effects of purulent meningitis on the changes of matrix metalloproteinase-2 (MMP-2) and matrix metalloproteinase inhibitor-1 (TIMP-1) in cerebrospinal fluid of neonates

This study was aimed to investigate the changes of matrix metalloproteinase-2 (MMP-2) and matrix metalloproteinase inhibitor-1 (TIMP-1) in cerebrospinal fluid (CSF) of neonates with purulent meningitis. 195 cases (n=195) were divided into PM group (neonatal purulent meningitis), VM group (neonatal virus meningitis) and control group (healthy neonates). The expression levels of MMP-2 and TIMP-1 were detected by ELISA while the level of PCT was determined by chemiluminescence analyzer. The levels of MMP-2 and TIMP-1 in CSF and PCT in serum were compared in three groups and the correlation was discussed. The level of MMP-2 in CSF in 3 groups were statistically significant (F=16.126, P<0.05) similarly the level of TIMP-1 in CSF of 3 groups were statistically significant (F=16.093, P<0.05). The serum level of PCT in PM group was 14.73 +/- 2.14ng/l, in VM group was 9.06 +/- 1.05ng/l and in control group it was 0.37 +/- 0.12ng/l. The levels of MMP-2 and TIMP-1 in CSF were positively correlated with the serum level of PCT in both PM and VM group. The expression of MMP-2, TIMP-1 and serum PCT in CSF of newborns with purulent meningitis was increased. The findings suggest that MMP-2, TIMP-1 and PCT are involved in the occurrence and development of neonatal purulent meningitis.