tokens: By Northern analysis , macrophage inflammatory protein ( MIP ) -2 mRNA in BAL cells increased markedly 1 h after NaVO3 instillation and reduced a little bit at 4 h , whereas MIP-1alpha mRNA in BAL cells was expressed relatively high 1 h after NaVO3 instillation , although a basal expression was detected in control group , and returned rapidly nearly to control level at 4 h .