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result(s) for
"CIN"
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Mechanisms of chromosomal instability (CIN) tolerance in aggressive tumors: surviving the genomic chaos
2023
Chromosomal instability (CIN) is a pervasive feature of human cancers involved in tumor initiation and progression and which is found elevated in metastatic stages. CIN can provide survival and adaptation advantages to human cancers. However, too much of a good thing may come at a high cost for tumor cells as excessive degree of CIN-induced chromosomal aberrations can be detrimental for cancer cell survival and proliferation. Thus, aggressive tumors adapt to cope with ongoing CIN and most likely develop unique susceptibilities that can be their Achilles’ heel. Determining the differences between the tumor-promoting and tumor-suppressing effects of CIN at the molecular level has become one of the most exciting and challenging aspects in cancer biology. In this review, we summarized the state of knowledge regarding the mechanisms reported to contribute to the adaptation and perpetuation of aggressive tumor cells carrying CIN. The use of genomics, molecular biology, and imaging techniques is significantly enhancing the understanding of the intricate mechanisms involved in the generation of and adaptation to CIN in experimental models and patients, which were not possible to observe decades ago. The current and future research opportunities provided by these advanced techniques will facilitate the repositioning of CIN exploitation as a feasible therapeutic opportunity and valuable biomarker for several types of human cancers.
Journal Article
Berberine alleviates contrast‐induced nephropathy by activating Akt/Foxo3a/Nrf2 signalling pathway
2024
Contrast‐induced nephropathy (CIN) is a condition that causes kidney damage in patients receiving angiography with iodine‐based contrast agents. This study investigated the potential protective effects of berberine (BBR) against CIN and its underlying mechanisms. The researchers conducted both in vivo and in vitro experiments to explore BBR's renal protective effects. In the in vivo experiments, SD rats were used to create a CIN model, and different groups were established. The results showed that CIN model group exhibited impaired renal function, severe damage to renal tubular cells and increased apoptosis and ferroptosis. However, BBR treatment group demonstrated improved renal function, decreased apoptosis and ferroptosis. Similar results were observed in the in vitro experiments using HK‐2 cells. BBR reduced ioversol‐induced apoptosis and ferroptosis, and exerted its protective effects through Akt/Foxo3a/Nrf2 signalling pathway. BBR administration increased the expression of Foxo3a and Nrf2 while decreasing the levels of p‐Akt and p‐Foxo3a. In conclusion, this study revealed that BBR effectively inhibited ioversol‐induced apoptosis and ferroptosis in vivo and in vitro. The protective effects of BBR were mediated through the modulation of Akt/Foxo3a/Nrf2 signalling pathway, leading to the alleviation of CIN. These findings suggest that BBR may have therapeutic potential for protecting against CIN in patients undergoing angiography with iodine‐based contrast agents.
Journal Article
Impact and Effectiveness of the Quadrivalent Human Papillomavirus Vaccine: A Systematic Review of 10 Years of Real-world Experience
by
Perez, Gonzalo
,
Das, Rituparna
,
Kjaer, Susanne K.
in
Condylomata Acuminata - prevention & control
,
Condylomata Acuminata - virology
,
Developed countries
2016
Prophylactic human papillomavirus (HPV) vaccination programs constitute major public health initiatives worldwide. We assessed the global effect of quadrivalent HPV (4vHPV) vaccination on HPV infection and disease. PubMed and Embase were systematically searched for peer-reviewed articles from January 2007 through February 2016 to identify observational studies reporting the impact or effectiveness of 4vHPV vaccination on infection, anogenital warts, and cervical cancer or precancerous lesions. Over the last decade, the impact of HPV vaccination in real-world settings has become increasingly evident, especially among girls vaccinated before HPV exposure in countries with high vaccine uptake. Maximal reductions of approximately 90% for HPV 6/11/16/18 infection, approximately 90% for genital warts, approximately 45% for low-grade cytological cervical abnormalities, and approximately 85% for high-grade histologically proven cervical abnormalities have been reported. The full public health potential of HPV vaccination is not yet realized. HPV-related disease remains a significant source of morbidity and mortality in developing and developed nations, underscoring the need for HPV vaccination programs with high population coverage.
Journal Article
Accuracy of GynTect® Methylation Markers to Detect Recurrent Disease in Patients Treated for CIN3: A Proof-of-Concept Case-Control Study
by
Scheungraber, Cornelia
,
Petzold, Annett
,
Hillemanns, Peter
in
Accuracy
,
Cellular biology
,
Cervical cancer
2024
Post-treatment follow-up in women with CIN3 is mandatory due to relapse in up to 15% of patients within 2 years. Standard follow-up care based on hrHPV-DNA/cytology co-testing has high sensitivity but limited specificity. The aim of our proof-of-concept case-control study was to evaluate the performance of the methylation test GynTect® for the detection of recurrent CIN2/3 during follow-up. Residual clinical material from a recent, prospective, multicenter, observational study was available for further analysis. We studied a sample of 17 cases with recurrent CIN2/3 diagnosed within 24 months of follow-up and 31 controls without recurrence. DNA from cervical scrapes at baseline (immediately before CIN3 surgery) and up to three follow-up visits were analyzed for hrHPV and GynTect® methylation status. Cytology data were available from the previous study. Overall, 12 cases and 21 controls were GynTect-positive at baseline. In these subgroups, single test sensitivity at first follow-up was 67% (95% CI 39–87%) for GynTect® compared to 83% (95% CI 55–96%) for hrHPV (p = 0.50). Single test specificity was significantly higher for GynTect® (90%, 95% CI 71–98% vs. 62%, 95% CI 40–80%) (p = 0.03). In a co-testing setting, both hrHPV/cytology and GynTect®/cytology detected all recurrences. Specificity for GynTect®/cytology was higher than for hrHPV/cytology, but this difference was not statistically significant. In conclusion, for initially GynTect-positive patients, both hrHPV and GynTect® tests detected recurrent disease with similar sensitivity, but the GynTect® assay has a higher specificity. Incident hrHPV infection and/or persisting multifocal hrHPV infections without clinical disease are most likely responsible for the poorer specificity of the hrHPV test. A future prospective validation study will have to show whether GynTect®/cytology co-testing can outperform hrHPV/cytology co-testing in post-treatment surveillance.
Journal Article
Risk factors for human papillomavirus infection, cervical intraepithelial neoplasia and cervical cancer: an umbrella review and follow-up Mendelian randomisation studies
by
Tsilidis, Konstantinos K.
,
Kyrgiou, Maria
,
Ellis, Laura Burney
in
Biomedicine
,
Cancer
,
Cervical cancer
2023
Background
Persistent infection by oncogenic human papillomavirus (HPV) is necessary although not sufficient for development of cervical cancer. Behavioural, environmental, or comorbid exposures may promote or protect against malignant transformation. Randomised evidence is limited and the validity of observational studies describing these associations remains unclear.
Methods
In this umbrella review, we searched electronic databases to identify meta-analyses of observational studies that evaluated risk or protective factors and the incidence of HPV infection, cervical intra-epithelial neoplasia (CIN), cervical cancer incidence and mortality. Following re-analysis, evidence was classified and graded based on a pre-defined set of statistical criteria. Quality was assessed with AMSTAR-2. For all associations graded as weak evidence or above, with available genetic instruments, we also performed Mendelian randomisation to examine the potential causal effect of modifiable exposures with risk of cervical cancer. The protocol for this study was registered on PROSPERO (CRD42020189995).
Results
We included 171 meta-analyses of different exposure contrasts from 50 studies. Systemic immunosuppression including HIV infection (RR = 2.20 (95% CI = 1.89–2.54)) and immunosuppressive medications for inflammatory bowel disease (RR = 1.33 (95% CI = 1.27–1.39)), as well as an altered vaginal microbiome (RR = 1.59 (95% CI = 1.40–1.81)), were supported by strong and highly suggestive evidence for an association with HPV persistence, CIN or cervical cancer. Smoking, number of sexual partners and young age at first pregnancy were supported by highly suggestive evidence and confirmed by Mendelian randomisation.
Conclusions
Our main analysis supported the association of systemic (HIV infection, immunosuppressive medications) and local immunosuppression (altered vaginal microbiota) with increased risk for worse HPV and cervical disease outcomes. Mendelian randomisation confirmed the link for genetically predicted lifetime smoking index, and young age at first pregnancy with cervical cancer, highlighting also that observational evidence can hide different inherent biases. This evidence strengthens the need for more frequent HPV screening in people with immunosuppression, further investigation of the vaginal microbiome and access to sexual health services.
Journal Article
Evaluation of Risk Factors Associated with Expectant Management in CIN 1/2: A Multicenter Real-World Cohort Study
2025
Background/Objectives: To evaluate the effectiveness of expectant management on grades 1 and 2 cervical intraepithelial neoplasia (CIN), including factors associated with regression and progression. Methods: This multicenter study included 561 women managed expectantly and 359 who underwent immediate surgery at eight institutes between 2013 and 2023. Results: Over a 4-year period, 63% and 68% of CIN 1 and CIN 2 cases regressed, and 9% and 14% of cases progressed, respectively. The median regression times were 1.5 years for CIN 1 and 1.2 years for CIN 2. High-risk human papillomavirus (HPV) types, especially HPV 58 (adjusted hazard ratio [HR]: 0.61; p = 0.032) and high-grade initial cytology, atypical squamous cells—cannot exclude high-grade squamous intraepithelial lesion (ASC-H) and high-grade squamous intraepithelial lesion (HSIL) (adjusted HR: 0.3, p < 0.001), were associated with a lower likelihood of regression. Also, hematological disorders reduced the likelihood of regression (adjusted HR 0.39, p = 0.045). In a separate analysis of the immediate surgery group, age in the 30s (p = 0.016) and HPV 16 infection (p = 0.005) were associated with pathologic upgrading at surgery. Conclusions: CIN 1 and 2 usually regress, allowing expectant management for up to 1.5 and 1.2 years, respectively. However, HPV 58 infection or high-grade initial cytology, and hematological disorders are indications for careful monitoring. Patients in their 30s or infected with HPV 16 have a higher risk of pathologic upgrading at surgery.
Journal Article
The Molecular Hallmarks of the Serrated Pathway in Colorectal Cancer
2019
Colorectal cancer (CRC) is a leading cause of cancer death worldwide. It includes different subtypes that differ in their clinical and prognostic features. In the past decade, in addition to the conventional adenoma-carcinoma model, an alternative multistep mechanism of carcinogenesis, namely the “serrated pathway”, has been described. Approximately, 15 to 30% of all CRCs arise from neoplastic serrated polyps, a heterogeneous group of lesions that are histologically classified into three morphologic categories: hyperplastic polyps, sessile serrated adenomas/polyps, and the traditional serrated adenomas/polyps. Serrated polyps are characterized by genetic (BRAF or KRAS mutations) and epigenetic (CpG island methylator phenotype (CIMP)) alterations that cooperate to initiate and drive malignant transformation from normal colon mucosa to polyps, and then to CRC. The high heterogeneity of the serrated lesions renders their diagnostic and pathological interpretation difficult. Hence, novel genetic and epigenetic biomarkers are required for better classification and management of CRCs. To date, several molecular alterations have been associated with the serrated polyp-CRC sequence. In addition, the gut microbiota is emerging as a contributor to/modulator of the serrated pathway. This review summarizes the state of the art of the genetic, epigenetic and microbiota signatures associated with serrated CRCs, together with their clinical implications.
Journal Article
Potential Association between Vaginal Microbiota and Cervical Carcinogenesis in Korean Women: A Cohort Study
2021
Convincing studies demonstrated that vaginal flora is one of the most impactful key components for the well-being of the genital tract in women. Nevertheless, the potential capability of vaginal-derived bacterial communities as biomarkers to monitor cervical carcinogenesis (CC) has yet to be studied actively compared to those of bacterial vaginosis (BV). We hypothesized that vaginal microbiota might be associated with the progression of CC. In this study, we enrolled 23 participants, including healthy controls (HC group; n = 7), patients with cervical intraepithelial neoplasia (CIN) 2 and 3 (CIN group, n = 8), and patients with invasive cervical cancer (CAN group; n = 8). Amplicon sequencing was performed using the Ion Torrent PGM to characterize the vaginal microbiota. Patients with CIN and CAN presented vaginal microbiota dysbiosis compared with HC. The alpha diversity analysis revealed that CC has a trend to be increased in terms of diversity indexes. Moreover, CC was associated with the abundance of specific microbes, of which Lactobacillus and Gardnerella were the most significantly different between HC and CIN, whereas Streptococcus was differentially abundant in CAN compared with CIN. We then evaluated their diagnostic abilities. Testing in terms of diagnostic ability using the three genera revealed considerably high performance with an area under the receiver-operating characteristic curve of 0.982, 0.953, and 0.922. The current study suggests that the presence of Gardnerella and Streptococcus may be involved in the advancment of CC.
Journal Article
The Cinema of Attractions Reloaded
2006,2025
Twenty years ago, Tom Gunning and André Gaudreault introduced the concept of attraction to define the quintessence of the earliest films made between 1895 and 1906. As \"cinema of attractions\" this concept has be come widely adopted, even outside the field of early cinema. Ranging from the films of the Lumière brothers to The Matrix by Andy and Larry Wachowski, from trains rushing into the audience to bullet time effects, the \"cinema of attractions\" is a cinema that shocks, astonishes and directly addresses the film spectator.
This anthology traces the history of the \"cinema of attractions,\" reconstructs its conception and questions its attractiveness and usefulness for both pre-classical and post-clas sical cinema. With contributions by Christa Blümlinger, Warren Buckland, Scott Bukatman, Donald Crafton, Nicolas Dulac, Thomas Elsaes ser, André Gaudreault, Laurent Guido, Tom Gunning, Malte Hagener, Pierre-Emmanuel Jaques, Charlie Keil, Frank Kessler, Germain Lacasse, Alison McMahan, Charles Musser, Viva Paci, Eivind Røssaak, Vivian Sobchack, Wanda Strauven, Dick Tomasovic.
White Terror
2022
-- Russell Meeuf has a strong journalistic writing style that is well-suited to a trade audience. His research focuses on popular media and culture, semiotics and visual communication, critical and cultural studies of mass media, representations of crime and the criminal justice system in U.S. media, and the history of cinema. His work has resulted in four published books and articles in Cinema Journal, The Journal of Communication Inquiry, The Journal of Popular Film and Television, and Third Text, among other journals. -- The book fills a stark gap in existing horror literature while tackling a topic featured prominently in popular media by centering issues of racial resentment, white fragility, and white guilt in our examination of horror cinema. -- This is an exemplary crossover publication in film and media studies and builds our offerings in subjects including horror, popular culture, politics and the media, and issues of race, gender, and class. -- The trade audience for this book includes fans of the horror genre, popular culture enthusiasts, and people interested in intersections of politics and media and representations of race, gender, and class in the media. It could be used in related undergraduate courses in film and cultural studies.