Publications by authors named "Michael Constantine"

Purpose: With increased demand for cancer genetic testing (GT), providers are exploring alternative service delivery models such as video education (VE). We compare the uptake of GT among 250 patients with breast, ovarian, pancreatic, or metastatic prostate cancer randomly assigned to receive either pretest VE or a pretest visit with a genetic counselor (GC).

Materials And Methods: Using a 3:1 ratio, 187 patients were randomly assigned to the VE arm and 63 patients to the GC arm.

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Purpose: Long-term outcomes of patients with stage I human epidermal growth factor receptor 2 (HER2)-positive breast cancer receiving adjuvant trastuzumab emtansine (T-DM1) remain undefined, and prognostic predictors represent an unmet need.

Methods: In the ATEMPT phase II trial, patients with stage I centrally confirmed HER2-positive breast cancer were randomly assigned 3:1 to adjuvant T-DM1 for 1 year or paclitaxel plus trastuzumab (TH). Coprimary objectives were to compare the incidence of clinically relevant toxicities between arms and to evaluate invasive disease-free survival (iDFS) with T-DM1.

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Background: The impact of abbreviated neoadjuvant regimens for HER2+ breast cancer on rates of breast conservation therapy (BCT) is unclear. We aimed to determine BCT rates in a single-arm prospective trial of neoadjuvant paclitaxel/trastuzumab/pertuzumab (THP) in patients with stage II or III HER2+ breast cancer.

Study Design: BCT eligibility was prospectively recorded before and after THP.

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De-escalating adjuvant therapy following pathologic complete response (pCR) to an abbreviated neoadjuvant regimen in human epidermal growth factor receptor 2-positive (HER2+) breast cancer is the focus of international research efforts. However, the feasibility of this approach and its appeal to patients and providers had not been formally investigated. We aimed to assess adherence to de-escalated adjuvant antibody doublet therapy (trastuzumab and pertuzumab [HP], without chemotherapy) among patients with pCR following neoadjuvant paclitaxel/HP (THP).

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The excellent outcomes seen in patients treated with adjuvant trastuzumab emtansine (T-DM1) in the ATEMPT trial and the favorable toxicity profile associated with this agent make T-DM1 a potential therapeutic option for select patients with stage I HER2-positive breast cancer. Moreover, T-DM1 is an established adjuvant treatment for patients with HER2-positive breast cancer with the residual invasive disease after neoadjuvant therapy. Given that cardiotoxicity is the most significant adverse event of trastuzumab, which is a main molecular component of T-DM1, we conducted a sub-analysis of the ATEMPT trial to determine the cardiac safety of adjuvant T-DM1.

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Background: In early trials, hypersensitivity reactions (HSRs) to paclitaxel were common, thus prompting the administration of antihistamines and corticosteroids before every paclitaxel dose. We tested the safety of omitting corticosteroids after cycle 2 during the paclitaxel portion of the dose-dense (DD) doxorubicin-cyclophosphamide (AC)-paclitaxel regimen.

Patients, Materials, And Methods: In this prospective, single-arm study, patients who completed four cycles of DD-AC for stage I-III breast cancer received paclitaxel 175 mg/m every 2 weeks for four cycles.

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Article Synopsis
  • The study investigates chemotherapy-related amenorrhea (CRA) as an indicator of ovarian toxicity and its implications for women's fertility and menopause risks, comparing rates between two treatments: paclitaxel-trastuzumab (TH) and ado-trastuzumab emtansine (T-DM1).
  • Patients with early-stage HER2-positive breast cancer from the ATEMPT trial were monitored for menstrual changes over 18 months after receiving either TH or T-DM1, with findings showing a 50% CRA rate in TH recipients compared to 24% in T-DM1 recipients (p=0.045).
  • The conclusion emphasizes that T-DM1 is associated with a lower
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Purpose: The ATEMPT trial was designed to determine if treatment with trastuzumab emtansine (T-DM1) caused less toxicity than paclitaxel plus trastuzumab (TH) and yielded clinically acceptable invasive disease-free survival (iDFS) among patients with stage I human epidermal growth factor receptor 2-positive (HER2+) breast cancer (BC).

Methods: Patients with stage I centrally confirmed HER2+ BC were randomly assigned 3:1 to T-DM1 or TH and received T-DM1 3.6 mg/kg IV every 3 weeks for 17 cycles or T 80 mg/m IV with H once every week × 12 weeks (4 mg/kg load →2 mg/kg), followed by H × 39 weeks (6 mg/kg once every 3 weeks).

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Skeletal muscle and adipose tissue express the vitamin D receptor and may be a mechanism through which vitamin D supplementation slows cancer progression and reduces cancer death. In this exploratory analysis of a double-blind, multicenter, randomized phase II clinical trial, 105 patients with advanced or metastatic colorectal cancer who were receiving chemotherapy were randomized to either high-dose vitamin D (4000 IU) or standard-dose (400 IU) vitamin D. Body composition was measured with abdominal computed tomography at enrollment (baseline) and after cycle 8 of chemotherapy (16 weeks).

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Purpose: Adverse events (AE) during oncology clinical trials are typically reported using the National Cancer Institute Common Terminology Criteria for Adverse Events (CTCAE), which provides information about the frequency and severity of AEs from the provider's perspective. Instruments that track patient-reported outcomes (PRO) complement the CTCAE and provide additional patient-centered information about the toxicity profile of an anti-cancer drug.

Methods: We conducted a single-arm, open-label phase II study of eribulin as first- or second-line therapy for metastatic hormone receptor-positive/HER2-negative (HR+/HER2-) or triple-negative breast cancer (TNBC).

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Purpose: The use of growth factors adds considerable expense and some toxicity to adjuvant breast cancer chemotherapy. We tested the feasibility and safety of omitting routine peg-filgrastim use during the paclitaxel portion of the dose-dense doxorubicin-cyclophosphamide-paclitaxel regimen.

Patients And Methods: This was a prospective, single-arm study in which patients 18 to 65 years of age who completed 4 cycles of dose-dense doxorubicin-cyclophosphamide for stage I-III breast cancer received paclitaxel 175 mg/m every 2 weeks.

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We tested the hypothesis that using CXCR4 inhibition to target the interaction between the tumor cells and the microenvironment leads to sensitization of the tumor cells to apoptosis. Eligibility criteria included multiple myeloma (MM) patients with 1-5 prior lines of therapy. The purposes of the phase I study were to evaluate the safety and maximal-tolerated dose (MTD) of the combination.

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Importance: In observational studies, higher plasma 25-hydroxyvitamin D (25[OH]D) levels have been associated with improved survival in metastatic colorectal cancer (CRC).

Objective: To determine if high-dose vitamin D3 added to standard chemotherapy improves outcomes in patients with metastatic CRC.

Design, Setting, And Participants: Double-blind phase 2 randomized clinical trial of 139 patients with advanced or metastatic CRC conducted at 11 US academic and community cancer centers from March 2012 through November 2016 (database lock: September 2018).

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Introduction: The nursing profession has been influential in conducting research to investigate the effect of continuing education programs on clinical practice. This research has indicated positive gains in competencies and behaviors, such as, becoming more research positive and dynamic as practitioners. There is, however, a dearth of studies investigating the clinical impact of Masters degrees in the physiotherapy profession.

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