Publications by authors named "Mary D Chamberlin"

Background: Leaders in the field have called for exercise counseling to become standard of care by 2029. An Affect-based exercise prescription (Affect-Rx) may be a viable strategy for supporting this effort.

Aims: Guided by the ORBIT Model for developing behavioral treatments, this Phase 1b study evaluated breast cancer survivors' perceived acceptability of Affect-Rx.

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Despite adjuvant treatment with endocrine therapies, estrogen receptor-positive (ER+) breast cancers recur in a significant proportion of patients. Recurrences are attributable to clinically undetectable endocrine-tolerant persister cancer cells that retain tumor-forming potential. Therefore, strategies targeting such persister cells may prevent recurrent disease.

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Article Synopsis
  • Head and neck cancer (HNC) is a growing health issue in Rwanda, with a study analyzing data from 1001 patients revealing that 82% had squamous cell carcinoma and a mean age of diagnosis at 51.1 years, predominantly in males.
  • The study utilized p16 immunohistochemistry to assess HPV prevalence, finding that 22% of cases were p16-positive, with 19% testing positive for HPV, particularly HPV16.
  • It concluded that there is an urgent need for improved cancer testing and data collection in Rwanda to better understand and combat HNC, especially focusing on oropharyngeal cases and associated risk factors.
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Breast cancer is the most common malignancy affecting women worldwide and is notable for its morphologic and biologic diversity, with varying risks of recurrence following treatment. The Oncotype DX Breast Recurrence Score test is an important predictive and prognostic genomic assay for estrogen receptor positive/HER2 negative breast cancer that guides therapeutic strategies; however, such tests can be expensive, delay care, and are not widely available. The aim of this study was to develop a multi-model approach integrating the analysis of whole-slide images and clinicopathologic data to predict their associated breast cancer recurrence risks and categorize these patients into two risk groups according to the predicted score: low-risk and high-risk.

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  • Estrogen receptor-positive (ER+) breast cancers often recur due to undetectable persister cancer cells that survive endocrine treatments, necessitating new strategies to target these cells and prevent recurrence.
  • Researchers used CRISPR-Cas9 screening to discover that these persister cells rely on mitochondrial respiration instead of glycolysis for energy, indicating a unique metabolic mechanism.
  • A clinical trial revealed that tumors with residual cells after endocrine therapy showed increased mitochondrial content, suggesting that targeting mitochondrial metabolism could enhance treatment effectiveness against these resilient cancer cells.
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Importance: Following treatment, breast cancer survivors face challenges participating in valued activities.

Objective: To determine whether a telephone-based coaching rehabilitation intervention enhances activity participation in the year following breast cancer treatment.

Design, Setting, And Participants: In this multisite, single-blind randomized clinical trial (Optimizing Functional Recovery of Breast Cancer Survivors), recruitment occurred between August 28, 2019, and April 30, 2022.

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Article Synopsis
  • - Cancer is a significant public health issue in Rwanda and other low- and middle-income countries, with rising treatment costs leading to financial burdens for patients, prompting this study to examine the financial toxicity associated with cancer care in Rwanda.
  • - Conducted over six months at three referral hospitals, the study involved interviews with 239 cancer patients (mostly women over 50) to identify the sources of their financial strain while undergoing treatment for various types of cancer.
  • - Results indicated that many patients faced severe financial challenges; 44% sold property, 29% sought charity, and 16% took loans to afford treatment, highlighting the need for new health financing solutions to improve access to affordable cancer care.
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Purpose: The aim of this study is to investigate whether near-infrared spectral tomography (NIRST) might serve as a reliable prognostic tool to predict residual cancer burden (RCB) in patients with breast cancer undergoing neoadjuvant chemotherapy (NAC) based upon early treatment response measurements.

Experimental Design: A total of thirty-five patients with breast cancer receiving NAC were included in this study. NIRST imaging was performed at multiple time points, including: before treatment, at end of the first cycle, at the mid-point, and post-NAC treatments.

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Our international partnerships have fostered longstanding collaborative relationships leading to the development of unique, locally-designed, and sustainable training programs that serve as models for global health education and cooperation.

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Lifestyle factors play a major role in the risk of breast cancer. This review aimed to examine the size of the effect of select lifestyle factors on risk for breast cancer and assess the quality of existing evidence. The authors performed an umbrella review of systematic reviews.

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Due to the current limited capacity to provide digital mammography-based screening to all women, and the lack of modern surgical oncology methods, mastectomy is still the predominant form of surgical treatment in many parts of the world. As such there is little incentive to detect breast cancer earlier and significant fear of treatment and outcomes continues to contribute to late presentations. Neoadjuvant chemotherapy, pre-operative breast MRI and surgical mapping techniques can combine forces to allow for more women to be treated with breast conservation, decrease fear of treatment and improve outcomes.

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Purpose: Strategies to implement estrogen therapy for advanced estrogen receptor-positive (ER+) breast cancer are underdeveloped. Preclinical data suggest that cycling treatment with 17β-estradiol followed by estrogen deprivation can control tumor growth long-term.

Patients And Methods: Postmenopausal women with advanced ER+/HER2- breast cancer with recurrence or progression on ≥ 1 antiestrogen or aromatase inhibitor (AI)-based therapy were eligible.

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Purpose: In the genomic era, more women with low-risk breast cancer will forego chemotherapy and rely on adjuvant endocrine therapy (AET) to prevent metastatic recurrence. However, some of these patients will unfortunately relapse. We sought to understand this outcome.

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Purpose: Metaplastic breast cancer (MpBC) is a rare aggressive subtype that responds poorly to cytotoxics. Median survival is approximately 8 months for metastatic disease. We report results for advanced MpBC treated with ipilimumab + nivolumab, a cohort of S1609 for rare cancers (DART: NCT02834013).

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Article Synopsis
  • The study examined factors that influence treatment responses and survival outcomes in patients with inflammatory breast cancer (IBC) and locally advanced breast cancer (LABC).
  • It involved analyzing tumor-infiltrating lymphocytes (TILs), CD20 B-cell frequencies, and PD-L1 expression levels in a cohort of 383 patients to assess their correlation with pathologic complete response (pCR) and survival rates.
  • Results indicated that while several immune factors were associated with better outcomes, CD20PD-L1TILs specifically improved disease-free survival in IBC patients, suggesting potential for biomarker-guided therapy approaches.
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Objective: The aryl hydrocarbon receptor (AHR) plays a key role in obesity. In vitro studies revealed that the tryptophan metabolite kynurenine (Kyn) activates AHR signaling in cultured hepatocytes. The objective of this study was to determine whether Kyn activated the AHR in mice to induce obesity.

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Matching of actionable tumor mutations with targeted therapy increases response rates and prolongs survival in lung cancer patients. Drug development and trials targeting genetic alterations are expanding rapidly. We describe the role of a Molecular Tumor Board (MTB) in the design of molecularly informed treatment strategies in our lung cancer patient population.

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Purpose: Circulating tumor DNA in plasma may present a minimally invasive opportunity to identify tumor-derived mutations to inform selection of targeted therapies for individual patients, particularly in cases of oligometastatic disease where biopsy of multiple tumors is impractical. To assess the utility of plasma DNA as a "liquid biopsy" for precision oncology, we tested whether sequencing of plasma DNA is a reliable surrogate for sequencing of tumor DNA to identify targetable genetic alterations.

Methods: Blood and biopsies of 1-3 tumors were obtained from 4 evaluable patients with advanced breast cancer.

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Effective communication between providers and patients with serious illness is critical to ensure that treatment is aligned with patient goals. We developed and tested an implementation strategy for incorporating the previously developed Serious Illness Conversation Guide (SICG), a clinician script, into hematology-oncology fellowship training at a single US academic medical center. Between December 2017 and April 2018, we trained 8 oncology fellows to use and document the SICG.

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Purpose: To evaluate the feasibility of brigade-style, multiphasic cancer screening in Honduras, exploring data from 3 screening events that each tested for multiple cancers on single occasions.

Methods: This series of 3 studies each used a single-arm, post-test-only design to explore the feasibility of implementing multiphasic, community-based cancer screening at the same rural location in 2013, 2016, and 2017. The 2013 event for women screened for 2 cancers (breast and cervix), and the 2016 event for women screened for 3 cancers (breast, cervix, and thyroid).

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Purpose: To provide expert guidance to clinicians and policymakers in resource-constrained settings on the management of patients with late-stage colorectal cancer.

Methods: ASCO convened a multidisciplinary, multinational Expert Panel that reviewed existing guidelines, conducted a modified ADAPTE process, and used a formal consensus process with additional experts for two rounds of formal ratings.

Results: Existing sets of guidelines from four guideline developers were identified and reviewed; adapted recommendations from five guidelines form the evidence base and provided evidence to inform the formal consensus process, which resulted in agreement of ≥ 75% on all recommendations.

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Despite the clinical efficacy of anthracycline agents such as doxorubicin, dose-limiting cardiac toxicities significantly limit their long-term use. Here, we present the case of a 33-year-old female patient with extensive metastatic ER+/PR+/HER2- mucinous adenocarcinoma of the breast, who was started on doxorubicin/cyclophosphamide therapy after progressing on paclitaxel and ovarian suppressor goserelin with aromatase inhibitor exemestane. The patient was comanaged by cardiology, who carefully monitored measures of cardiac function, including EKGs, serial echocardiograms, and profiling of lipids, troponin, and pro-BNP every 2 months.

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The majority of advanced breast cancers have genetic alterations that are potentially targetable with drugs. Through initiatives such as The Cancer Genome Atlas (TCGA) and the International Cancer Genome Consortium (ICGC), data can be mined to provide context for next-generation sequencing (NGS) results in the landscape of advanced breast cancer. Therapies for targets other than estrogen receptor alpha (ER) and HER2, such as cyclin-dependent kinases CDK4 and CDK6, were recently approved based on efficacy in patient subpopulations, but no predictive biomarkers have been found, leaving clinicians to continue a trial-and-error approach with each patient.

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