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Few synthetic ion transporters have been reported incorporating indole as the core moiety. We have developed a novel bisindole-based transporter capable of efficient transmembrane anion antiport. This system induced cytotoxicity in MCF-7 breast cancer cells chloride ion homeostasis disruption and the associated ROS generation, mitochondrial membrane depolarization, and lysosomal deacidification.
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http://dx.doi.org/10.1039/d4ob00554f | DOI Listing |
Bioresour Technol
September 2025
Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu 610213, China. Electronic address:
Microbial desalination cells (MDCs) have traditionally employed simplified NaCl solutions as feedwater for synchronous desalination and bioenergy recovery. Nevertheless, the specific mechanisms by which MDCs remove complex multi-ions from saline wastewater remain obscure. This study thoroughly investigated ion migration, bioelectrochemical dynamics, and microbial ecological responses across three distinct configurations: monovalent ions - PMDC, divalent cations - CMDC and anions - AMDC.
View Article and Find Full Text PDFBiochem Biophys Res Commun
August 2025
Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, 730000, China; Key Laboratory of Gene Editing for Breeding, School of Life Sciences, Lanzhou University, Lanzhou, Gansu, 730000, China. Electronic address: xiaochb@lz
Ammonium (NH) toxicity significantly limits nitrogen use efficiency (NUE) in agriculture. Nitrate (NO) supplementation mitigates this toxicity, with the anion channel SLAH3 playing a central role by mediating NO efflux to counteract NH-induced rhizosphere acidification. SLAH3, a plasma membrane protein with ten transmembrane domains and cytosolic N- and C-termini, is intrinsically silent.
View Article and Find Full Text PDFThe ion channel-forming natural product amphotericin B (AmB) can serve as a molecular prosthetic for the cystic fibrosis transmembrane conductance regulator (CFTR) anion channel and thereby restore host defenses in cultured cystic fibrosis (CF) airway epithelia. This is despite the fact that the permeability of AmB-based channels favors cations, and these channels lose their capacity to increase airway surface liquid (ASL) pH in CF airway epithelia at high concentrations. We hypothesize that modifying such channels to favor anion permeability would make them more CFTR-like and thus increase their potential therapeutic effects compared to AmB.
View Article and Find Full Text PDFbioRxiv
August 2025
Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA.
Cell surface receptors transmit information across the plasma membrane to connect the extracellular environment to intracellular function. While the structures and interactions of the receptors have been long established as mediators of signaling, increasing evidence suggests that the membrane itself plays an active role in both suppressing and enhancing signaling. Identifying and investigating this contribution have been challenging owing to the complex composition of the plasma membrane.
View Article and Find Full Text PDFProc Natl Acad Sci U S A
September 2025
Cutaneous Biology Research Center, Department of Dermatology, Massachusetts General Hospital, Boston, MA 02114.
While it has been appreciated for decades that lysosomes can import cysteine, its significance for whole-organism physiology has remained uncertain. Recent work identified MFSD12 as a transmembrane protein required for cysteine import into lysosomes (and melanosomes), enabling genetic interrogation of this pathway. Here, we show that knockout mice die between embryonic days 10.
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