Aims: To evaluate how the genetic and epigenetic profile of human papillomavirus 16 (HPV16) changes from asymptomatic cervical infections to cervical cancer (CaCx) development.
Methods: HPV16 physical status, methylation of its early-late promoters and its upstream enhancer sequences were analysed in samples from asymptomatic cervical infections (n=89), pre-neoplastic lesions (low and high grade squamous intraepithelial lesions LSIL/HSIL, n=28) and primary CaCx (n=98).
Results: In asymptomatic infection (65%, 58/89) and LSIL/HSIL (57%, 16/28) samples, the episomal form of HPV16 was predominant whereas integration of HPV16 was significantly (p=0.01) higher in CaCx (59%, 57/98). The integrated viral form was also present in asymptomatic (27%, 24/89) and LSIL/HSIL (25%, 7/28) samples. The methylation of the enhancer region was comparable (29-34%) among asymptomatic, LSIL/HSIL and CaCx samples. The episomal form exhibited relatively higher methylation of the early promoter (52%) than that of the late promoter (40%) in asymptomatic infection but the integrated form in asymptomatic carriers showed the opposite methylation pattern (early promoter (42%) vs late-promoter (54%)). A similar pattern was observed in LSIL/HSIL samples, with comparable frequencies (44%) of early and late promoter methylation of the episomal form. However, irrespective of HPV16 physical status, higher methylation of late promoter than that of early promoter was observed in CaCx samples. An inverse correlation was observed between HPV16 integration and overall methylation of the early promoter-enhancer region in CaCx (p=0.05), LSIL/HSIL (p=0.09) and asymptomatic samples (p=0.09).
Conclusions: Our study indicates that integration of HPV16 along with changes in methylation pattern of early and late promoters is essential for neoplastic transformation of asymptomatic cervical infections.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1136/jclinpath-2014-202611 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Outcomes of a Population-Based Congenital Cytomegalovirus Screening Program.
JAMA Pediatr
January 2025
Department of Pediatrics, Children's Hospital of Eastern Ontario, University of Ottawa, Ottawa, Ontario, Canada.
Importance: Detection of congenital cytomegalovirus (cCMV) infection has previously relied on targeted screening programs or clinical recognition; however, these approaches miss most cCMV-infected newborns and fail to identify those infants who are asymptomatic at birth but at risk for late-onset sensorineural hearing loss.
Objective: To determine the feasibility of using routinely collected newborn dried blood spots (DBS) in a population-based cCMV screen to identify infants at risk for hearing loss and describe outcomes of infants screened.
Design, Setting, And Participants: This diagnostic study of a population-based screening program in Ontario, Canada, took place from July 29, 2019, to July 31, 2023.
Impact of Clinical Surveillance on Outcomes of Locally Recurrent Nasopharyngeal Carcinoma.
Head Neck
January 2025
Department of ENT-Head & Neck Surgery, Singapore General Hospital, Singapore, Singapore.
Background: Local recurrence of nasopharyngeal carcinoma (NPC) occurs in 10%-20% of patients, with salvage potential in early recurrences. Yet, clear surveillance protocols are lacking. We compare survival outcomes and suitability for salvage in symptomatic and incidentally detected locally recurrent NPC.
View Article and Find Full Text PDFUltrasmall Au-GRHa Nanosystem for FL/CT Dual-Mode Imaging-Guided Targeting Photothermal Therapy of Ovarian Cancer.
Anal Chem
January 2025
State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China.
As the most common and lethal cancer of the female gonads, ovarian cancer (OC) has a grave impact on people's health. OC is asymptomatic, insidious in onset, difficult to diagnose and treat, fast-growing, and easy to metastasize and has poor prognosis and high mortality. How to detect OC as early as possible and treat it without side effects has become a challenging medical problem.
View Article and Find Full Text PDFDifferences in sensorimotor integration, cervical sensorimotor control, and cognitive-motor dual tasking costs in chronic non-specific neck pain patients with high vs. low catastrophizing tendencies compared to healthy controls.
Behav Brain Res
January 2025
CBP Nonprofit (A Spine Research Foundation), Eagle, ID 83616, USA. Electronic address:
Chronic non-specific neck pain (CNSNP) is a common condition and its relationship to the pain catastrophizing construct in terms of sensorimotor functions and dual task performance is not fully understood. We aimed to investigate the differences in sensorimotor integration, cervical sensorimotor control, and cognitive-motor dual tasking abilities between CNSNP patients (> 3 months) with high versus low catastrophizing tendencies and healthy controls. Ninety participants were recruited, 30 asymptomatic controls, and 60 patients with CNSNP; 30 scoring high (> 75th percentile) and 30 scoring low (< 25th percentile) on the pain catastrophizing scale (PCS).
View Article and Find Full Text PDFTotal Pancreatectomy for Locally Advanced Pancreatic Adenocarcinoma with Coeliac Trunk Resection and Retrograde Gastric Revascularization Through Aorto-Hepato-Spleno Allograft.
Ann Surg Oncol
January 2025
Department of HPB Surgery and Liver Transplantation, Hôpital Beaujon, Assistance Publique-Hôpitaux de Paris (AP-HP), Université de Paris-Cité, Clichy, France.
Background: Locally advanced pancreatic adenocarcinomas (LA-PDAC) are more frequently operated now than in the past because of new regimen chemotherapy and improvement in surgical technique. Resection of the coeliac trunk (CT) during pancreatoduodenectomy (PD) or total pancreatectomy (TP) is not routinely done owing to the risk of liver and gastric ischaemia. In this video, a patient with LA-PDAC underwent TP with CT resection and retrograde gastric revascularization through the distal splenic artery.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!