Association between interleukin-2, interleukin-10, secretory immunoglobulin A and immunoglobulin G expression in vaginal fluid and human papilloma virus outcome in patients with cervical lesions.

The present study was designed to investigate the association between a change in vaginal local immunity and human papilloma virus (HPV) infection outcome in patients with cervical lesions, through the study of the expression of vaginal local immune factors, interleukin (IL)-2, IL-10, secretory immunoglobulin A (sIgA) and IgG, in patients with different grades of cervical lesions and different degrees of cervical lesions caused by HPV infection prior to and following treatment. The experimental group comprised 136 patients with low-grade squamous intraepithelial lesions, 236 patients with high-grade squamous intraepithelial lesions and 133 patients with cervical squamous cell carcinoma, while the control group comprised 100 time- and location-matched healthy women. The concentrations of sIgA, IgG, IL-2 and IL-10 in the vaginal lavage fluid, were detected using ELISA prior to treatment and at 3, 6 and 12 months after treatment. Prior to treatment, differences in HPV infection rate and changes in vaginal immune factors between patients with all grades of lesions and controls were statistically significant (P<0.05). Furthermore, IL-2 and IL-10 expression levels and the IL-2/IL-10 ratio in patients with different grades of lesions, with or without seroconversion, were significantly different to those in controls (P<0.05). However, the differences between changes in IgG and sIgA expression between patients with HPV seroconversion and patients with persistent HPV infection were not statistically significant (P>0.05). The results of the present study suggest that the restoration of humoral immune function promotes HPV seroconversion, and that IL-2 and IL-10 levels and their ratio may reflect the severity of cervical lesions and treatment effects to a certain extent.