Effect of hnRNP K and its interaction with HPV16 on cervical intraepithelial neoplasia / 中华流行病学杂志

ABSTRACT

Objective To investigate the effect of heterogeneous nuclear ribonucleoprotein K (hnRNP K) and its interaction with human papillomavims 16 (HPV16) on cervical intraepithelial neoplasia (CIN).Methods The participants included 67 women with normal cervix (NC),69 women with CIN Ⅰ and 68 women with CIN Ⅱ/Ⅲ in a community cohort of pathologically diagnosed women established in Jiexiu of Shanxi province,from June 2014 to June 2015.A structured questionnaire was used to collect the demographic data of the subjects and the related factors of cervical lesions.Cervical exfoliated cells and cervical tissues from biopsy or surgery were selected.The infection status of HPV16 was detected by flow-through hybridization.The protein expression levels of hnRNP K were evaluated by Western blot.SPSS 23.0 software was used to collate and analyze the data.To study the differences in demographic characteristics,related factors,hnRNP K protein and HPV16 infection among NC,CIN Ⅰ and CIN Ⅱ / Ⅲ groups,X2 test,trend x2 test,and Kruskal-Wallis H test were conducted.Multiple comparisons of hnRNP K protein in three groups were completed by using the Bonferroni method.The OR and its 95％CI of hnRNP K,HPV16 and CIN were calculated by using the unconditional logistic regression models.Two-way interactions between hnRNP K protein and HPV16 infection on CIN were analyzed by using additive model and related indicators.Results HPV16 infection rates were 10.4％ in women with normal cervix,14.5％ in women with CIN Ⅰ and 41.2％ in women with CIN Ⅱ/Ⅲ,respectively.The differences among three groups were significant (P＜0.001).Moreover,the infection rates of HPV16 gradually increased with the increasing severity of CIN (trend x2=18.512,P＜0.001).The differences in protein expression of hnRNP K among three groups were significant (H=48.138,P＜0.001) and the expressionincreased with the development of cervical lesionss (trend x2=21.765,P＜0.001).Results from the interaction analysis indicated that there were additive effects between high expression of hnRNP K protein and HPV16 in CIN Ⅱ/Ⅲ group compared with normal group (API=0.639,95％CI0.083-1.196).In contrast,no such additive effect was found in CIN Ⅰ group.Conclusions HPV16 infection and over-expression of hnRNP K protein were associated with the increased risk of cervical intraepithelial neoplasia.There might be interaction between hnRNP K protein overexpression and HPV16 infection existed on the progress of CIN Ⅰ/Ⅲ.