Publications by authors named "Raymond Esper"

What Is This Summary About?: This is a summary of the results of a study called PHAROS. This study looked at combination treatment with encorafenib (BRAFTOVI) and binimetinib (MEKTOVI). This combination of medicines was studied in people with metastatic non-small-cell lung cancer (NSCLC).

View Article and Find Full Text PDF
Article Synopsis
  • - The study assesses the effectiveness and safety of the drug combination encorafenib (BRAF inhibitor) and binimetinib (MEK inhibitor) in treating patients with BRAF-mutant metastatic non-small-cell lung cancer (NSCLC), following positive results in metastatic melanoma cases.
  • - In this ongoing phase II trial, 98 patients (some new to treatment, some previously treated) received the drug combo, revealing an objective response rate of 75% in treatment-naïve patients and 46% in previously treated individuals, with several other measured efficacy outcomes reported.
  • - Common side effects included nausea, diarrhea, and fatigue, leading to dose adjustments in approximately 24% of participants, with one severe adverse event (grade
View Article and Find Full Text PDF
Article Synopsis
  • Chronic low-grade inflammation in fat tissue is linked to a higher risk of breast cancer, potentially due to changes in fat cell signals (adipokines) and inflammation-triggering immune cells (macrophages).
  • In a study, rats were fed either a Western diet or a fish oil diet, revealing that the fish oil diet led to a healthier balance of fatty acids and a shift towards anti-inflammatory fat signals.
  • The conditioned media from fish oil-fed rats showed a significantly lower ability to promote stem cell self-renewal compared to that from rats on a Western diet, suggesting that dietary changes could impact how fat tissues interact with breast stem cells.
View Article and Find Full Text PDF

Multiple mechanisms are likely to account for the link between obesity and increased risk of postmenopausal breast cancer. Two adipokines, leptin and adiponectin, are of particular interest due to their opposing biologic functions and associations with breast cancer risk. In the current study, we investigated the effects of leptin and adiponectin on normal breast epithelial stem cells.

View Article and Find Full Text PDF

Proper, graded communication between different cell types is essential for normal development and function. In the nervous system, heart, and for some cancer cells, part of this communication requires signaling by soluble and membrane-bound factors produced by the NRG1 gene. We have previously shown that glial-derived neurotrophic factors activate a rapid, localized release of soluble neuregulin from neuronal axons that can, in turn promote proper axoglial development (Esper, R.

View Article and Find Full Text PDF

Neurons in the nascent dorsal root ganglia are born and differentiate in a complex cellular milieu composed of postmitotic neurons, and mitotically active glial and neural progenitor cells. Neurotrophic factors such as NT-3 are critically important for promoting the survival of postmitotic neurons in the DRG. However, the factors that regulate earlier events in the development of the DRG such as the mitogenesis of DRG progenitor cells and the differentiation of neurons are less defined.

View Article and Find Full Text PDF

The neuregulins are a family of growth and differentiation factors with a wide range of functions in the nervous system. The power and diversity of the neuregulin signaling system comes in part from a large number of alternatively-spliced forms of the NRG1 gene that can produce both soluble and membrane-bound forms. The soluble forms of neuregulin are unique from other factors in that they have a structurally distinct heparin-binding domain that targets and potentiates its actions.

View Article and Find Full Text PDF

The signals that determine whether axons are ensheathed or myelinated by Schwann cells have long been elusive. We now report that threshold levels of neuregulin-1 (NRG1) type III on axons determine their ensheathment fate. Ensheathed axons express low levels whereas myelinated fibers express high levels of NRG1 type III.

View Article and Find Full Text PDF

The proper function of neuromuscular junctions requires an extremely high density of acetylcholine receptors (AChRs) that may be achieved from neuron-derived factors including agrin and neuregulin. Here, we show that neuregulin-1 and agrin co-localize at neuromuscular junctions in vivo and form complexes when co-transfected into COS-7 cells. When these COS-7 cells are cultured with myotubes, synergistic effects are observed for AChR clustering, membrane insertion of new AChRs, and induction of AChR mRNA.

View Article and Find Full Text PDF

During peripheral nervous system development, Schwann cells are precisely matched to the axons that they support. This is mediated by axonal neuregulins that are essential for Schwann cell survival and differentiation. Here, we show that sensory and motor axons rapidly release heparin-binding forms of neuregulin in response to Schwann cell-derived neurotrophic factors in a dose-dependent manner.

View Article and Find Full Text PDF

Objective: To evaluate the degree to which rehabilitation researchers report information on the interventions they evaluate.

Design: Intervention research articles published in six United States medical rehabilitation journals in 1997-1998 were rated on the presence or absence of information on the overall design, intervention used, and outcome measures. Rating was performed independently by two authors who used discussion to resolve disagreements.

View Article and Find Full Text PDF