The role of the Eph-ephrin system in the etiology of pathological conditions has been consolidated throughout the years. In this context, approaches directed against this signaling system, intended to modulate its activity, can be strategic therapeutic opportunities. Currently, the most promising class of compounds able to interfere with the Eph receptor-ephrin protein interaction is composed of synthetic derivatives of bile acids. In the present review, we summarize the progresses achieved, in terms of chemical expansions and structure-activity relationships, both in the steroidal core and the terminal carboxylic acid group, along with the pharmacological characterization for the most promising Eph-ephrin antagonists in in vivo settings.
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http://dx.doi.org/10.3390/ph15020137 | DOI Listing |
J Neurosci
December 2024
Instituto de Neurociencias de Alicante (Consejo Superior de Investigaciones Científicas-Universidad Miguel Hernández, CSIC-UMH). Campus San Juan, Av. Ramón y Cajal s/n, Alicante 03550 (Spain)
Eph/ephrin signaling is crucial for organizing retinotopic maps in vertebrates. Unlike other EphAs, which are expressed in the embryonic ventral retina, EphA4 is found in the retinal ganglion cell (RGC) layer at perinatal stages, and its role in mammalian visual system development remains unclear. Using classic stripe assays, we demonstrate that, while RGC axons are repelled by ephrinB2, they grow on ephrinB1 stripes through EphA4-mediated adhesion.
View Article and Find Full Text PDFBiochem Biophys Res Commun
August 2024
Department of Biological Sciences, Konkuk University, Seoul, 05029, Republic of Korea; Korea Hemp Institute, Konkuk University, Seoul, 05029, Republic of Korea. Electronic address:
The Eph receptor, a prototypically large receptor protein tyrosine kinase, interacts with ephrin ligands, forming a bidirectional signaling system that impacts diverse brain functions. Eph receptors and ephrins mediate forward and reverse signaling, affecting neurogenesis, axon guidance, and synaptic signaling. While mammalian studies have emphasized their roles in neurogenesis and synaptic plasticity, the Drosophila counterparts are less studied, especially in glial cells, despite structural similarities.
View Article and Find Full Text PDFFront Oncol
April 2024
Department of Pathology, Faculty of Medical Sciences, University of Campinas (UNICAMP), Campinas, São Paulo, Brazil.
iScience
March 2024
Division of Gastroenterology and Hepatology, Enteric Neuroscience Program, Mayo Clinic, Rochester, MN, USA.
Gastrointestinal immune cells, particularly muscularis macrophages (MM) interact with the enteric nervous system and influence gastrointestinal motility. Here we determine the human gastric muscle immunome and its changes in patients with idiopathic gastroparesis (IG). Single cell sequencing was performed on 26,000 CD45 cells obtained from the gastric tissue of 20 subjects.
View Article and Find Full Text PDFPharmacol Res
November 2023
Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan 430071, China; Hubei Clinical Center & Key Lab of Intestinal & Colorectal Diseases, Wuhan 430071, China. Electronic address:
The extent of gut inflammation depends largely on the gut barrier's integrity and enteric neuroimmune interactions. However, the factors and molecular mechanisms that regulate inflammation-related changes in the enteric nervous system (ENS) remain largely unexplored. Eph/ephrin signaling is critical for inflammatory response, neuronal activation, and synaptic plasticity in the brain, but its presence and function in the ENS have been largely unknown to date.
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