Abstract:
BACKGROUND:High-risk human papillomavirus (HR-HPV) persistent infection is the main cause of cervical cancer and its precancerous lesions. A previous study showed that HPV16 and HPV58 infections were the most common infection types in the local region. Some studies also declared that HPV58 E7 variants increased the risk of cervical cancer among Asian populations. OBJECTIVE:This study aimed to determine whether the HPV58 E7 T20I (C632T) variant promotes the malignant behavior of cervical cancer cells and the underlying mechanism of the HR-HPV E7 oncoprotein involved in the development of cervical cancer. METHODS:CCK-8 and clone formation assays were used to detect cell proliferation ability. Transwell assays and cell wound healing assays were used to evaluate cell migration ability. Targeted knockdown of E2F1 expression using specific siRNA, RT-qPCR and Western blot were performed to assess gene expression changes. A chromatin immunoprecipitation assay was used to verify that E2F1 interacted with the TOP2A promoter region. RESULTS:HPV58 E7 and HPV58 E7M oncoproteins increased the proliferation and migration ability of cervical cancer cells. However, the HPV58 E7 T20I variant did not promote malignant behaviors compared with wild-type HPV58 E7. HPV E7 and E7M oncoproteins increased the expression of TOP2A, BIRC5 and E2F1, and knockdown of HPV E7 decreased their expression. Low E2F1 expression reduced the expression of TOP2A and BIRC5 and inhibited the proliferation and migration ability of cervical cancer cells. E2F1 interacted with the TOP2A gene promoter region to promote its transcriptional expression. CONCLUSIONS:The HPV58 E7 T20I variant did not promote malignant behaviors compared with wild-type HPV58 E7. The HR-HPV E7 oncoprotein enhanced the proliferation and migration of cervical cancer cells, which was considered to be due to the HPV E7 oncoprotein increasing the expression of BIRC5 and TOP2A by upregulating the transcription factor E2F1.
journal_name
Anticancer Agents Med Chemjournal_title
Anti-cancer agents in medicinal chemistryauthors
Tian S,Zhang L,Li Y,Cao D,Quan S,Guo Y,Yang X,Yang Tdoi
10.2174/1871520620666201106085227subject
Has Abstractpub_date
2020-11-05 00:00:00eissn
1871-5206issn
1875-5992pii
ACAMC-EPUB-111239pub_type
杂志文章abstract:PURPOSE:Elderly patients with metastatic colorectal cancer (mCRC) differ from the general population and are underrepresented in clinical trials. We, retrospectively, analyzed the safety and efficacy of XELOX regimen in the treatment of elderly patients affected by mCRC. PATIENTS AND METHODS:One-hundred-eleven consecu...
journal_title:Anti-cancer agents in medicinal chemistry
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journal_title:Anti-cancer agents in medicinal chemistry
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journal_title:Anti-cancer agents in medicinal chemistry
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journal_title:Anti-cancer agents in medicinal chemistry
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journal_title:Anti-cancer agents in medicinal chemistry
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journal_title:Anti-cancer agents in medicinal chemistry
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journal_title:Anti-cancer agents in medicinal chemistry
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journal_title:Anti-cancer agents in medicinal chemistry
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journal_title:Anti-cancer agents in medicinal chemistry
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journal_title:Anti-cancer agents in medicinal chemistry
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journal_title:Anti-cancer agents in medicinal chemistry
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journal_title:Anti-cancer agents in medicinal chemistry
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journal_title:Anti-cancer agents in medicinal chemistry
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journal_title:Anti-cancer agents in medicinal chemistry
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