158 results match your criteria: "Basser Center for BRCA[Affiliation]"

Long-term risks of gene therapy are not fully understood. In this study, we evaluated safety outcomes in 783 patients over more than 2,200 total patient-years of observation from 38 T cell therapy trials. The trials employed integrating gammaretroviral or lentiviral vectors to deliver engineered receptors to target HIV-1 infection or cancer.

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Refining breast cancer genetic risk and biology through multi-ancestry fine-mapping analyses of 192 risk regions.

Nat Genet

January 2025

Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN, USA.

Genome-wide association studies have identified approximately 200 genetic risk loci for breast cancer, but the causal variants and target genes are mostly unknown. We sought to fine-map all known breast cancer risk loci using genome-wide association study data from 172,737 female breast cancer cases and 242,009 controls of African, Asian and European ancestry. We identified 332 independent association signals for breast cancer risk, including 131 signals not reported previously, and for 50 of them, we narrowed the credible causal variants down to a single variant.

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Traditional approaches for evaluating the impact of scientific research - mainly scholarship (i.e., publications, presentations) and grant funding - fail to capture the full extent of contributions that come from larger scientific initiatives.

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Background: The lifetime risk of pancreatic cancer in women with a germline mutation in BRCA1 and BRCA2 is not well established. In an international prospective cohort of female carriers of BRCA1 and BRCA2 mutations, the cumulative incidence of pancreatic cancer from age 40 until 80 years was estimated.

Methods: A total of 8295 women with a BRCA1 or BRCA2 mutation were followed for new cases of pancreatic cancer.

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Repurposing colforsin daropate to treat MYC-driven high-grade serous ovarian carcinomas.

Sci Signal

November 2024

Penn Ovarian Cancer Research Center, Department of Obstetrics and Gynecology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA.

High-grade serous ovarian cancer (HGSOC) is one of the deadliest cancers for women, with a low survival rate, no early detection biomarkers, a high rate of recurrence, and few therapeutic options. Forskolin, an activator of cyclic AMP signaling, has several anticancer activities, including against HGSOC, but has limited use in vivo. Its water-soluble derivative, colforsin daropate, has the same mechanism of action as forskolin and is used to treat acute heart failure.

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What happens after menopause? (WHAM): Impact of risk-reducing salpingo-oophorectomy on depressive and anxiety symptoms at 24 months.

Gynecol Oncol

January 2025

Connors Center for Women's Health and Gender Biology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA; Department of Psychiatry, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.

Article Synopsis
  • Women with BRCA1 and BRCA2 pathogenic variants may experience surgical menopause after RRSO, with previous studies showing increased depressive and anxiety symptoms at 6 and 12 months post-surgery.
  • A controlled study tracking 59 women undergoing RRSO and 91 comparison women found that, at 24 months, depressive and anxiety symptoms were not significantly elevated and did not differ between the two groups. However, symptoms at 12 months strongly predicted outcomes at 24 months.
  • The study concluded that while symptoms don't seem to escalate after 24 months, persistent symptoms observed at 12 months can indicate ongoing issues, with no significant impact from Menopausal Hormone Therapy on mental health.
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Mechanisms of Alternative Lengthening of Telomeres.

Cold Spring Harb Perspect Biol

January 2025

Department of Cancer Biology, Penn Center for Genome Integrity, Basser Center for BRCA, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA

In recent years, significant advances have been made in understanding the intricate details of the mechanisms underlying alternative lengthening of telomeres (ALT). Studies of a specialized DNA strand break repair mechanism, known as break-induced replication, and the advent of telomere-specific DNA damaging strategies and proteomic methodologies to profile the ribonucleoprotein composition of telomeres enabled the discovery of networks of proteins that coordinate the stepwise homology-directed DNA repair and DNA synthesis processes of ALT. These networks couple mediators of homologous recombination, DNA template-switching, long-range template-directed DNA synthesis, and DNA strand resolution with SUMO-dependent liquid condensate formation to create discrete nuclear bodies where telomere extension occurs.

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DNA methyltransferase and poly(ADP-ribose) polymerase inhibitors (DNMTis, PARPis) induce a stimulator of interferon (IFN) genes (STING)-dependent pathogen mimicry response (PMR) in ovarian (OC) and other cancers. We now show that combining DNMTis and PARPis upregulates expression of a little-studied nucleic-acid sensor, NFX1-type zinc finger-containing 1 protein (ZNFX1). We demonstrate that ZNFX1 is a novel master regulator for PMR induction in mitochondria, serving as a gateway for STING-dependent PMR.

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Objective: To measure vasomotor symptoms and menopause-related quality of life up to 24 months after RRSO, and the effects of Menopausal Hormone Therapy (MHT).

Methods: Prospective observational study of 104 premenopausal women at elevated risk of ovarian cancer planning RRSO and age-matched comparators (n = 102) who retained their ovaries. Vasomotor symptoms and quality of life were measured using the Menopause-specific QoL Intervention (MENQOL-I) scale.

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Phenotypic evaluation of deep learning models for classifying germline variant pathogenicity.

NPJ Precis Oncol

October 2024

Division of Health Policy, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.

Deep learning models for predicting variant pathogenicity have not been thoroughly evaluated on real-world clinical phenotypes. Here, we apply state-of-the-art pathogenicity prediction models to hereditary breast cancer gene variants in UK Biobank participants. Model predictions for missense variants in BRCA1, BRCA2 and PALB2, but not ATM and CHEK2, were associated with breast cancer risk.

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Crossing the border: Replication fork adducts move to lysosomes for autophagic repair.

Mol Cell

October 2024

Department of Cancer Biology, Penn Center for Genome Integrity, Basser Center for BRCA, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA 19104-6160, USA. Electronic address:

In a recent study in Cell, Lascaux et al. implicate TEX264 in the autophagy-driven resolution of nuclear topoisomerase 1 cleavage complexes (TOP1cc) in lysosomes, altering current concepts on the mechanism of action for clinically relevant doses of TOP1 inhibitors.

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Article Synopsis
  • High-Grade Serous Ovarian Cancer (HGSOC) develops from precursors in the fallopian tubes, yet the molecular changes during this progression are poorly understood.
  • Researchers used advanced imaging and spatial transcriptomics to analyze tissue samples from different stages of HGSOC, revealing critical immune modulating mechanisms and molecular alterations associated with the disease's progression.
  • Findings indicate a shift from immune surveillance to immune suppression in the tumor microenvironment, offering insights into potential biomarkers and therapeutic targets for early detection and intervention in HGSOC.
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Hormonal Contraception and Breast Cancer Risk for Carriers of Germline Mutations in and .

J Clin Oncol

October 2024

Centre for Epidemiology and Biostatistics, School of Population and Global Health, The University of Melbourne, Melbourne, VIC, Australia.

Article Synopsis
  • The study investigates the relationship between hormonal contraceptive use and breast cancer risk in both unaffected women and mutation carriers.
  • Out of the participants, it was found that hormonal contraceptive use was linked to a higher breast cancer risk in mutation carriers, particularly with longer duration of use.
  • The findings suggest that decisions regarding hormonal contraceptive use for women with genetic mutations should consider individual risk factors and benefits.
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There is an unmet need for effective ovarian cancer screening and diagnostic approaches that enable earlier-stage cancer detection and increased overall survival. We have developed a high-performing accessible approach that evaluates cfDNA fragmentomes and protein biomarkers to detect ovarian cancer.

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Molecular glues that inhibit deubiquitylase activity and inflammatory signalling.

bioRxiv

November 2024

Astbury Centre for Structural Molecular Biology, School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK.

Deubiquitylases (DUBs) are crucial in cell signalling and are often regulated by interactions within protein complexes. The BRCC36 isopeptidase complex (BRISC) regulates inflammatory signalling by cleaving K63-linked polyubiquitin chains on Type I interferon receptors (IFNAR1). As a Zn-dependent JAMM/MPN DUB, BRCC36 is challenging to target with selective inhibitors.

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Article Synopsis
  • Clinical genetic testing helps find cancer risks by identifying gene changes, but some of these changes are confusing because we don't know what they mean (called VUS).
  • Researchers studied a huge number of breast cancer patients and healthy people to understand these confusing gene changes better.
  • They found that their method of analyzing data closely matches what other experts say about which gene changes are harmless or harmful, giving more information about 785 unclear changes.
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Purpose: Genetic counselors (GCs) increasingly play key roles in advancing genomic medicine through innovative research. Here, we examine one large cohort of GCs' evolving contributions to the literature, with the goal of facilitating worldwide professional development for GCs through scholarly activities.

Methods: Publications were cataloged by members of the Section of Genetic Counseling (Section), established at the Children's Hospital of Philadelphia and the University of Pennsylvania in 2014, including publication year, journal, impact factor, and author position.

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Article Synopsis
  • - Half of all BRCA1 and BRCA2 gene mutation carriers are male, yet their increased cancer risks—especially for prostate, pancreatic, and breast cancers—are often overlooked compared to females.
  • - Current research shows a growing number of FDA-approved targeted therapies for cancers linked to BRCA1/2 mutations, and there are new clinical trials that focus on male carriers, highlighting the need for better screening and risk-reduction options.
  • - Despite these advancements, fewer males are getting genetic testing compared to females, and healthcare providers need to prioritize offering these tests to men to improve early detection and treatment for male carriers.
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Article Synopsis
  • * Key findings show high odds ratios and frequencies of PVs for BRCA1, BRCA2, and PALB2, particularly in estrogen receptor-positive breast cancer, while PV frequencies for some syndromic BCSGs like TP53 and STK11 are notably low.
  • * This analysis provides valuable insights for understanding the genetic risks associated with breast cancer in the general population, which can aid in better testing and prevention strategies.
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BRCA2 is a tumor suppressor protein responsible for safeguarding the cellular genome from replication stress and genotoxicity, but the specific mechanism(s) by which this is achieved to prevent early oncogenesis remains unclear. Here, we provide evidence that BRCA2 acts as a critical suppressor of head-on transcription-replication conflicts (HO-TRCs). Using Okazaki-fragment sequencing (Ok-seq) and computational analysis, we identified origins (dormant origins) that are activated near the transcription termination sites (TTS) of highly expressed, long genes in response to replication stress.

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Article Synopsis
  • Age-related microangiopathy (SVD) damages small blood vessels leading to problems in the brain, retina, liver, and kidneys, and is linked to DNA damage as part of the aging process.
  • Variants of the TREX1 protein, which play a crucial role in DNA repair, are associated with retinal vasculopathy with cerebral leukoencephalopathy (RVCL), causing improper localization within cells and potential DNA damage.
  • Research shows that these TREX1 variants increase vulnerability to DNA damage and are connected to early-onset breast cancer, highlighting a link between abnormal TREX1 activity, aging-related DNA damage, and microvascular disease.
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Genome-wide association analyses of breast cancer in women of African ancestry identify new susceptibility loci and improve risk prediction.

Nat Genet

May 2024

Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN, USA.

Article Synopsis
  • - The study analyzed genetic factors linked to breast cancer in a diverse sample of 18,034 African ancestry cases and 22,104 controls, identifying 12 genetic variants tied to increased risk.
  • - Key findings included a rare variant (rs61751053) associated with overall breast cancer risk (odds ratio 1.48) and a common variant (rs76664032) connected to triple-negative breast cancer (odds ratio 1.30).
  • - A polygenic risk score (PRS) showed a predictive capability (0.60 area under the curve) for breast cancer risk, illustrating improved accuracy compared to PRS based on European data and highlighting the significance of diversity in genetic research.
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Using genome and transcriptome data from African-ancestry female participants to identify putative breast cancer susceptibility genes.

Nat Commun

May 2024

Division of Epidemiology, Department of Medicine, Vanderbilt Epidemiology Center, Vanderbilt-Ingram Cancer Center, Vanderbilt University Medical Center, Nashville, TN, USA.

African-ancestry (AA) participants are underrepresented in genetics research. Here, we conducted a transcriptome-wide association study (TWAS) in AA female participants to identify putative breast cancer susceptibility genes. We built genetic models to predict levels of gene expression, exon junction, and 3' UTR alternative polyadenylation using genomic and transcriptomic data generated in normal breast tissues from 150 AA participants and then used these models to perform association analyses using genomic data from 18,034 cases and 22,104 controls.

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Real-world evaluation of deep learning algorithms to classify functional pathogenic germline variants.

medRxiv

April 2024

Basser Center for BRCA, Abramson Cancer Center, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.

Deep learning models for variant pathogenicity prediction can recapitulate expert-curated annotations, but their performance remains unexplored on actual disease phenotypes in a real-world setting. Here, we apply three state-of-the-art pathogenicity prediction models to classify hereditary breast cancer gene variants in the UK Biobank. Predicted pathogenic variants in , and , but not and were associated with increased breast cancer risk.

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