Publications by authors named "G K HIRST"
Importance: Intratumoral immunotherapy that leverages the biological characteristics of high-risk ductal carcinoma in situ (DCIS) may be able to reduce the extent of surgical treatment and provide an alternative approach to improve patient outcomes.
Objective: To determine if combination intratumoral immunotherapy can activate immune cells to shrink or eliminate high-risk DCIS.
Design, Setting, And Participants: This phase 1 open-label nonrandomized clinical trial at a single academic center tested the safety and efficacy of intratumoral immunotherapy in patients with high-risk DCIS, defined as at least 2 of the following present: younger than 45 years, tumor size greater than 5 cm, high-grade, palpable mass, hormone receptor (HR)-negative, or ERBB2-positive.
Purpose: The MammaPrint (MP) prognostic assay categorizes breast cancers into high- and low-risk subgroups, and the high-risk group can be further subdivided into high-1 (MP-H1), and very high-risk high-2 (MP-H2). The aim of this analysis was to assess clinical and molecular differences between the hormone receptor-positive (HR+)/HER2-negative MP-H1, -H2, and triple-negative (TN) MP-H1 and -H2 cancers.
Experimental Design: Pretreatment gene expression data from 742 HER2-negative breast cancers enrolled in the I-SPY2 neoadjuvant trial were used.
Only a subset of patients with breast cancer responds to immune checkpoint blockade (ICB). To better understand the underlying mechanisms, we analyze pretreatment biopsies from patients in the I-SPY 2 trial who receive neoadjuvant ICB using multiple platforms to profile the tumor microenvironment. A variety of immune cell populations and markers of immune/cytokine signaling associate with pathologic complete response (pCR).
View Article and Find Full Text PDFBackground: Hormone receptor-positive (HR+), human epidermal growth factor receptor 2 (HER2)-negative early-stage breast cancer (EBC) is a heterogenous disease. Identification of better clinical and molecular biomarkers is essential to guide optimal therapy for each patient.
Patients And Methods: We analyzed rates of pathologic complete response (pCR) and distant recurrence-free survival (DRFS) for patients with HR+/HER2-negative EBC in eight neoadjuvant arms in the I-SPY2 trial by clinical/molecular features: age, stage, histology, percentage estrogen receptor (ER) positivity, ER/progesterone receptor status, MammaPrint (MP)-High1 (0 to -0.
Article Synopsis
- - The study aimed to understand MRI imaging patterns in breast cancer patients undergoing neoadjuvant immunotherapy, particularly focusing on responses to various combinations of chemotherapy and immunotherapy in the I-SPY2 clinical trial.
- - Out of 43 patients analyzed, 44.4% receiving the chemo-immunotherapy experienced increased lymphadenopathy in the first 12 weeks, significantly higher compared to just 6.3% in the control group, with most cases linked to the SD-101 and pembrolizumab treatment.
- - Despite observing increased lymphadenopathy in some patients, this was not associated with a higher incidence of positive lymph nodes at surgery, even as breast tumor sizes decreased over time.