1. The expression of Oct3/4A mRNA and not its isoforms is upregulated by the HPV16 E7 oncoprotein
- Author
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Yazmín Gómez-Gómez, Jorge Organista-Nava, Sayuri Itzel Clemente-Periván, Alfredo Lagunas-Martínez, Eric Genaro Salmerón-Bárcenas, Daniel Villanueva-Morales, Dania Yahaira Ayala-Reyna, Luz del Carmen Alarcón-Romero, Julio Ortiz-Ortiz, Marco Antonio Jiménez-López, Ciresthel Bello-Rios, Marco Antonio Leyva-Vázquez, and Berenice Illades‑Aguiar
- Subjects
Genetics ,General Medicine ,Molecular Biology - Abstract
Oct3/4 a transcription factor is involved in maintaining the characteristics of cancer stem cells. Oct3/4 can be expressed differentially with respect to the progression of cervical cancer (CC). In addition, Oct3/4 can give rise to three isoforms by alternative splicing of the mRNA Oct3/4A, Oct3/4B and Oct3/4B1. The aim of this study was to evaluate the mRNA expression from Oct3/4A, Oct3/4B and Oct3/4B1 in low-grade squamous intraepithelial lesion (LSIL), high-grade squamous intraepithelial lesion (HSIL), CC samples, and measure the effect of the HPV16 E7 oncoprotein on the mRNA expression from Oct3/4 isoforms in the C-33A cell line.The expression levels of Oct3/4A, Oct3/4B and Oct3/4B1 mRNA were analyzed by reverse transcription quantitative polymerase chain reaction (RT-qPCR) in patients with LSILs, HSILs and CC. Additionally, C-33A cells that expressed the HPV16 E7 oncoprotein were established to evaluate the effect of E7 on the expression of Oct3/4 mRNA isoforms.Oct3/4A (p = 0.02), Oct3/4B (p = 0. 001) and Oct3/4B1 (p 0. 0001) expression is significantly higher in patients with LSIL, HSIL and CC than in woman with non-IL. In the C-33A cell line, the expression of Oct3/4A mRNA in the presence of the E7 oncoprotein increased compared to that in nontransfected C-33A cells.Oct3/4B and Oct3/4B1 mRNA were expressed at similar levels among the different groups. These data indicate that only the mRNA of Oct3/4A is upregulated by the HPV16 E7 oncoprotein.
- Published
- 2022