Pre-operative levels of angiopoietin protein-like 3 (ANGPTL3) in women diagnosed with high-grade serous carcinoma of the ovary

Cancer cells need constant supplies of lipids to survive and grow. Lipid dependence has been observed in various types of cancer, including high-grade serous ovarian carcinomas (HGSOC), which is a lethal form of gynecological malignancy. ANGPTL3, PCSK9, and Apo CIII are pivotal lipid-modulating factors, and therapeutic antibodies have been developed against each one (Evinacumab, Evolocumab and Volanesorsen, respectively). The roles -if any- of ANGPTL3, PCSK9, and Apo CIII in HGSOC are unclear. Moreover, levels of these lipid-modulating factors have never been reported before in HGSOC. In this study, circulating levels of ANGPTL3, PCSK9, and Apo CIII, along with lipid profiles, are examined to verify whether one or many of these lipid-regulating factors are associated with HGSOC. Methods ELISA kits were used to measure ANGPTL3, PCSK9 and Apo CIII levels in plasma samples from 31 women with HGSOC and 40 women with benign ovarian lesions (BOL) before treatment and surgery. A Roche Modular analytical platform measured lipid panels, Apo B and Lp(a) levels.Results ANGPTL3 levels were higher in women with HGSOC (84 ng/mL, SD: 29 ng/mL, n = 31) than in women with BOL (67 ng/mL, SD: 31 ng/mL, n = 40; HGSOC vs. BOL P = 0.019). Associations between the lipid panel and ANGPTL3, and the inverse relationship between HDL-cholesterol and triglycerides, were present in women with BOL but not with HGSOC. PCSK9 and Apo CIII were not associated with HGSOC.Conclusions In this cohort of 71 women, ANGPTL3 levels were increased in HGSOC patients. The presence of HGSOC disrupted the classic inverse relationship between HDL and triglycerides, as well as the association between the lipid panel and ANGPTL3. These associations were only maintained in cancer-free women. Given the availability of Evinacumab, a therapeutic antibody against ANGPTL3, the current finding prompts an assessment of whether ANGPTL3 inhibition has therapeutic potential in HGSOC.

An Interactive Educational Tool to Improve Human Papillomavirus Vaccine Knowledge and Recommendation Among Nurses

In United States, only 57% of  women and 53% of men in the recommended age groups have received all recommended doses of the human papillomavirus (HPV) vaccine. Healthcare provider education has been associated with strong vaccine recommendation and vaccination uptake. Our objective was to create a 7-min interactive online educational tool to improve knowledge and willingness to recommend the HPV vaccine among nurses. This is a prospective pre-test/post-test study to evaluate the effectiveness of the educational tool consisting of 10 flashcards in a question-answer format. Oncology nurses at our cancer center were invited to participate by email, which led them to the educational tool (i.e., intervention) along with pre- and post-test questions on HPV-associated cancers, vaccine-eligible age groups, dosing schedules, adverse events, and willingness to recommend. Of the 110 participants (mean age of 41.2 ± 11.4, 98% female, 64% >10 years of practice), there was improvement in knowledge after intervention in HPV-associated cancers (81% to 97%; p = 0.02), percentage of cervical caused by HPV (33% to 64%; p < 0.05), and dosing schedule (47% to 93%; p < 0.05). All participants correctly stated that continued screening is needed after vaccination both pre- and post-intervention. Eighty-five percent strongly agreed that the intervention improved their HPV knowledge, and 77% stated they were more likely to recommend the HPV vaccine after the intervention. While nurses are willing to recommend the vaccine, there remains persistent knowledge gaps. A brief 7-min self-administered online interactive flashcard educational intervention is effective in improving the HPV vaccine knowledge among nurses.

Dysregulation of Cholesterol Homeostasis in Ovarian Cancer

Cholesterol plays an essential role in maintaining the rigidity of cell membranes and signal transduction. Various investigations confirmed empirically that the dysregulation of cholesterol homeostasis positively correlates with tumor progression. More specifically, recent studies suggested the distinct role of cholesterol in ovarian cancer cell proliferation, metastasis and chemoresistance. In this review, we summarize the current findings that suggest the contribution of cholesterol homeostasis dysregulation to ovarian cancer progression and resistance to anti-cancer agents. We also discuss the therapeutic implications of cholesterol-lowering drugs in ovarian cancer.

Human Papillomavirus (HPV) Education and Knowledge Among Medical and Dental Trainees

Persistent human papillomavirus (HPV) infection is responsible for the majority of oropharyngeal and cervical cancers in the USA. Currently, HPV curricula within medical and dental schools are not standardized. As such, we implemented a brief online educational intervention to increase medical and dental trainees' knowledge of the HPV vaccine and the association between HPV and cancer. The objectives of this study were to (1) assess medical and dental trainees' baseline knowledge regarding HPV and HPV vaccine, (2) determine the willingness to recommend the HPV vaccine to patients, and (3) evaluate the impact of an online intervention on HPV-related knowledge. Medical and dental trainees from two large academic centers in the USA were asked to fill out an online pre-intervention questionnaire, followed by a 10-min HPV educational intervention based on the Center of Disease Control and Prevention (CDC) resources, and then a post-intervention questionnaire. There were 75 participants (67.4% females; median age 18-30 years). When asked about HPV-related cancer types, the correct response increased from 28.4% (pre-intervention) to 51.9% (post-intervention; p < 0.01). When asked about the prevalence of HPV infections, the correct response improved from 36 to 72% (p < 0.01). There was also a 25.2% improvement in identifying the correct HPV vaccination dosing schedule (p < 0.01). Eighty-seven percent of the participants mentioned that the online education improved their HPV knowledge, and 68.5% reported that they were more likely to recommend HPV vaccine after the online intervention. The proposed online educational intervention was effective at improving HPV-related cancer and HPV vaccine knowledge as well as attitudes towards vaccine recommendation among dental and medical trainees and could be implemented in medical and dental school curricula in the future.

Point of View: COVID-19 as a catalyst for reimagining cervical cancer prevention

Cervical cancer has killed millions of women over the past decade. In 2019 the World Health Organization launched the Cervical Cancer Elimination Strategy, which included ambitious targets for vaccination, screening, and treatment. The COVID-19 pandemic disrupted progress on the strategy, but lessons learned during the pandemic - especially in vaccination, self-administered testing, and coordinated mobilization on a global scale - may help with efforts to achieve its targets. However, we must also learn from the failure of the COVID-19 response to include adequate representation of global voices. Efforts to eliminate cervical cancer will only succeed if those countries most affected are involved from the very start of planning. In this article we summarize innovations and highlight missed opportunities in the COVID response, and make recommendations to leverage the COVID experience to accelerate the elimination of cervical cancer globally.

Abstract 5596: Cell free DNA levels and fragmentation patterns in different liquid biopsy analytes (blood, urine and vaginal fluid) in cervical cancer patients

Background: Cervical cancer (CC) is the 4th most commonly diagnosed cancer among women, with approximately 528,000 new cases annually. Current screening approaches for this disease have certain limitations; Pap tests require dedicated cytopathology infrastructure, while human papillomavirus (HPV) DNA testing may lead to invasive procedures in patients with transient infection. Liquid biopsy has emerged as a minimally invasive approach to detect and monitor disease progression and treatment response. We and others have previously demonstrated the clinical utility of circulating tumor (ct)DNA to monitor HPV+ cancers. Moreover, cell free (cf)DNA fragmentation patterns have been found to be a biomarker of disease burden. This cfDNA is thought to originate largely as a result of cell death, where small fragments of ~167 bp are associated with apoptosis and larger fragments (&gt;1000 bp) are associated with necrosis. Despite advances in liquid biopsy techniques, little is known about the composition of cfDNA from different analytes in CC patients.

Methods: The aim of this study was to compare the presence and composition of cfDNA from different liquid biopsy analytes in patients with CC and high grade cervical intraepithelial neoplasia or dysplasia (CIN/CD). Blood, urine, and vaginal swabs were collected from 20 patients with CC and 9 patients with CIN/CD at the McGill University Health Centre. All samples were centrifuged twice to isolate supernatant. Samples were tested for HPV ctDNA by ddPCR. Analysis of fragment length was performed using the Agilent Bioanalyzer 2100. Dominant fragment was determined as the DNA fragment with the highest concentration, while overall fragment was calculated as the average fragment across all bioanalyzer peaks.

Results: HPV16/18 ctDNA was detectable 14/20 CC patients and 2/6 CIN patients, and 0/3 CD patients in plasma, urine, and vaginal swab. Concordance for all sample types tested was seen in 90% of cases. On average, fragment analysis demonstrated 174, 195, and 183 bp dominant small fragments in plasma, urine and vaginal swab, respectively. Plasma samples showed only smaller fragments (range: 168-187 bp). Other analytes displayed a predominance of larger cfDNA, with an overall fragment size of 3996 and 5194 bp in urine and vaginal swab, respectively.

Conclusions: HPV-DNA was detectable in all analytes sampled in patients with CC and CIN, with a trend of higher detection in CC samples. The fragmentation patterns of cfDNA varied between patients and within patients across analytes, with larger fragments - likely of necrotic origin - seen only in urine and vaginal swab cfDNA. Smaller fragments - likely related to apoptosis - were seen across all sample types studied. Overall, analysis of fragmentation may provide valuable insight into cfDNA origins in different sample types and provide a novel biomarker for diagnosis and surveillance.

Citation Format: Sarah Tadhg Ferrier, Erica Mandato, Alexandra Bartolomucci, Thupten Tsering, Shuk On Annie Leung, Julia Valdemarin Burnier. Cell free DNA levels and fragmentation patterns in different liquid biopsy analytes (blood, urine and vaginal fluid) in cervical cancer patients. [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2023; Part 1 (Regular and Invited Abstracts); 2023 Apr 14-19; Orlando, FL. Philadelphia (PA): AACR; Cancer Res 2023;83(7_Suppl):Abstract nr 5596.

AACC Guidance Document on Cervical Cancer Detection: Screening, Surveillance, and Diagnosis

BACKGROUND

Persistent genital infection with high-risk human papilloma virus (hrHPV) causes the vast majority of cases of cervical cancer. Early screening, ongoing surveillance, and accurate diagnosis are crucial for the elimination of cervical cancer. New screening guidelines for testing in asymptomatic healthy populations and management guidelines for managing abnormal results have been published by professional organizations.

CONTENT

This guidance document addresses key questions related to cervical cancer screening and management including currently available cervical cancer screening tests and the testing strategies for cervical cancer screening. This guidance document introduces the most recently updated screening guidelines regarding age to start screening, age to stop screening, and frequencies of routine screening as well as risk-based management guidelines for screening and surveillance. This guidance document also summarizes the methodologies for the diagnosis of cervical cancer. Additionally, we propose a report template for human papilloma virus (HPV) and cervical cancer detection to facilitate interpretation of results and clinical decision-making.

SUMMARY

Currently available cervical cancer screening tests include hrHPV testing and cervical cytology screening. The screening strategies can be primary HPV screening, co-testing with HPV testing and cervical cytology, and cervical cytology alone. The new American Society for Colposcopy and Cervical Pathology guidelines recommend variable frequencies of screening and surveillance based on risk. To implement these guidelines, an ideal laboratory report should include the indication for the test (screening, surveillance, or diagnostic workup of symptomatic patients); type of test (primary HPV screening, co-testing, or cytology alone); clinical history of the patient; and prior as well as current testing results.

Loop Electrosurgical Excision Procedure in Managing Persistent Low-Grade Abnormality or Human Papillomavirus Positivity

OBJECTIVES

The aims of the study were to estimate the rate and to identify predictors of high-grade abnormalities among women with persistent low-grade abnormalities or high-risk human papillomavirus (hrHPV) positivity for at least 2 years stratified by presence (high risk) or absence (low risk) of previous high-grade results or HPV 16/18.

MATERIALS AND METHODS

A retrospective cohort study of patients who underwent a loop electrosurgical excision procedure (LEEP) for persistent low-grade or hrHPV positivity was performed. Patients were stratified based on whether they had a history of high-grade and/or HPV 16/18 positivity. Rates of high-grade or worse abnormalities on LEEP were compared using Fisher exact tests. Logistic regression was used to evaluate the associations between patient characteristics and high-grade results on the LEEP.

RESULTS

Three hundred eleven LEEPs were performed for persistent low-grade or hrHPV positivity. The rates of occult high grade were 12% and 22% among the low- and high-risk groups, respectively. Compared with those 45 years and older, the adjusted odds of high grade was 3.79 (95% CI = 1.19-12.1) for women aged 25-29 years. The odds of high grade was higher among current versus never smokers (6.40; 95% CI = 2.01-20.4) and those with a history of high-grade abnormality (2.23; 95% CI = 1.12-4.43). At 2 years, approximately half had an abnormal cytology and/or hrHPV positivity result independent of whether high grade was identified on their LEEP specimen.

CONCLUSIONS

Patients with persistent low-grade abnormalities or persistent hrHPV should be counseled on the risks and benefits of a LEEP given that 12%-22% have a risk of occult high grade, especially if they have a history of high-grade dysplasia.

Next-Generation Sequencing in the Diagnosis of Metastatic Lesions: Reclassification of a Glioblastoma as an Endometrial Cancer Metastasis to the Brain

Endometrial cancer is the most common gynecologic cancer in the U.S., but metastasis to the brain is rare, and diagnosis can be challenging. Traditional tools for determining if a tumor is a primary or metastatic lesion include pan-imaging, histopathologic studies, and immunohistochemistry. Molecular testing with next-generation sequencing has been increasingly used to augment these tests. We present a case of a patient who initially presented with a brain lesion diagnosed as glioblastoma on histology and immunohistochemistry, but whose diagnosis was later changed to metastasis from an endometrial primary based on molecular findings. The two tumors shared a common microsatellite instability signature and 51 DNA variants, including oncogenic driver mutations KRAS p.G13D, PIK3CA p.E545A, and PTEN p.I135V and p.K267Rfs*9. This highlights the power of molecular analysis in making the diagnosis in cases of rare metastases. KEY POINTS: Brain metastasis from endometrial primary is rare, and histopathological features may be augmented with molecular analysis to aid in diagnosis. Comparison of the molecular makeup of the primary endometrial lesion with the metastatic lesion may reveal high-risk molecular features that may be indicative of metastatic potential.

Advances in the treatment of platinum resistant epithelial ovarian cancer: an update on standard and experimental therapies

Introduction: Platinum-resistant ovarian cancer (PROC) is broadly defined as disease recurrence within 6 months of completing platinum-based chemotherapy, either in the primary or recurrent setting. Although there is significant heterogeneity, PROC is generally associated with poor outcomes and low response rates to standard chemotherapy. There have been novel developments in therapeutics for PROC based on biomarkers and a more nuanced understanding of DNA repair and immunologic pathways.Areas covered: This review provides a summary of standard of care and experimental therapies for patients with PROC. Recent advances in our understanding of the DNA damage response and immunobiology of ovarian cancer have paved the way for single agent and combinatorial strategies involving PARP inhibitors, cell cycle checkpoint inhibitors, and immune checkpoint inhibitors to overcome PARP resistance, capitalize on high replication stress, and promote effective anti-tumor immunity, respectively. Furthermore, novel agents including antibody drug conjugates, bispecific antibodies, and recombinant fusion proteins show promise as experimental treatment options.Expert opinion: Standard and experimental treatment options available to patients with PROC have expanded. Testing for BRCA status, tumor mutational burden, and mismatch repair deficiency is recommended to guide therapy. Clinical trial participation is strongly encouraged with a focus on biomarker-driven trials targeting specific patient populations. Novel approaches such as ADCs, bispecific antibodies, targeting the GAS6/AXL and Notch pathways, and oncolytic virotherapy show considerable promise as emerging therapies.

Triaging abnormal cervical cancer screening tests using p16INK4a detection by ELISA on fresh cervical samples

PROBLEM

Cervical cancer screening strategies in the United States include cotesting (human papillomavirus (HPV) with cytology), primary HPV with genotyping and reflex cytology, and cytology alone. An ongoing challenge is the appropriate triage of patients to colposcopy to those at highest risk. We investigated whether incorporation of p16INK4a immunodetection by enzyme-linked immunosorbent assay (ELISA) on fresh cervical samples obtained at the time of screening could improve appropriate referral to colposcopy.

METHOD OF STUDY

A derivation group comprised of cervical swabs collected from subjects with high-grade dysplasia or cancer (positive control) and from subjects with negative screening history (negative control). Samples collected from colposcopy were used to evaluate the existing screening strategies individually and with incorporation of p16INK4a ELISA. Histology was used as the gold standard.

RESULTS

Among 163 subjects recruited, 138 were included. In the derivation group, mean p16INK4a level was 2.86 ng/mL (n = 31) and 0.58 ng/mL (n = 20) among positive and negative controls respectively (p = 0.002) with an area under the receiver operator characteristic curve of 0.79 (p < 0.001). Among colposcopy subjects, sensitivity/specificity for cotesting, primary HPV, and cytology were 94%/42%, 88%/45%, and 88%/49%, respectively. Incorporation of p16INK4a resulted in similar sensitivity and improved specificity (cotesting+p16 88%/58%, primary HPV+p16 88%/57%, cytology+p16 81%/62%; p = 0.23/p = 0.008) with decrease in colposcopy referrals by 15% to 22% (p = 0.01).

CONCLUSIONS

These results demonstrate the feasibility of quantifying p16INK4a by ELISA in fresh cervical samples, and its potential as an adjunct to existing screening strategies in the identification of high grade-dysplasia while reducing the number of colposcopic referrals.

Female adnexal tumor of probable Wolffian Origin - A report of two cases at one institution

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FATWOs are rare gynecologic neoplasms of low malignant potential derived from mesonephric (Wolffian) duct remnants.

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FATWOs have diverse presentations from vague abdominal symptoms to incidental diagnosis.

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In general, FATWOs require no additional management beyond initial surgical intervention.