Academic Journal

Galectin-3 Regulates Smooth Muscle Contraction and Blood Pressure by Modulating CaV1.2 Channel Function.

Λεπτομέρειες βιβλιογραφικής εγγραφής
Τίτλος: Galectin-3 Regulates Smooth Muscle Contraction and Blood Pressure by Modulating CaV1.2 Channel Function.
Συγγραφείς: Loh KWZ; Department of Physiology (K.W.Z.L., Y.Z., C.L., J.Z., D.Y., M.C.L., Z.H., T.W.S.), National University of Singapore.; Yong Loo Lin School of Medicine, Cardiovascular and Metabolic Diseases Translational Research Programme (K.W.Z.L., C.L., T.W.S.), National University of Singapore., Zhou Y; Department of Physiology (K.W.Z.L., Y.Z., C.L., J.Z., D.Y., M.C.L., Z.H., T.W.S.), National University of Singapore.; Institute for Functional Intelligent Materials (Y.Z., T.W.S.), National University of Singapore., Liu C; Department of Physiology (K.W.Z.L., Y.Z., C.L., J.Z., D.Y., M.C.L., Z.H., T.W.S.), National University of Singapore.; Yong Loo Lin School of Medicine, Cardiovascular and Metabolic Diseases Translational Research Programme (K.W.Z.L., C.L., T.W.S.), National University of Singapore., Zhai J; Department of Physiology (K.W.Z.L., Y.Z., C.L., J.Z., D.Y., M.C.L., Z.H., T.W.S.), National University of Singapore., Jaladanki CK; Bioinformatics Institute, Agency for Science, Technology, and Research, Singapore (C.K.J.)., Jia Yi Neo C; Department of Research, National Neuroscience Institute, Singapore (C.J.Y.N., M.S., P.L., Z.H., T.W.S.)., Yu D; Department of Physiology (K.W.Z.L., Y.Z., C.L., J.Z., D.Y., M.C.L., Z.H., T.W.S.), National University of Singapore.; Electrophysiology Core Facility (D.Y.), National University of Singapore., Liang MC; Department of Physiology (K.W.Z.L., Y.Z., C.L., J.Z., D.Y., M.C.L., Z.H., T.W.S.), National University of Singapore., Shen M; Department of Research, National Neuroscience Institute, Singapore (C.J.Y.N., M.S., P.L., Z.H., T.W.S.)., Fan H; Chinese Institute for Molecular and Cellular Therapeutics, Chinese Institutes for Medical Research, Beijing, China (H.F.)., Liao P; Department of Research, National Neuroscience Institute, Singapore (C.J.Y.N., M.S., P.L., Z.H., T.W.S.)., Hu Z; Department of Physiology (K.W.Z.L., Y.Z., C.L., J.Z., D.Y., M.C.L., Z.H., T.W.S.), National University of Singapore.; Department of Research, National Neuroscience Institute, Singapore (C.J.Y.N., M.S., P.L., Z.H., T.W.S.)., Soong TW; Department of Physiology (K.W.Z.L., Y.Z., C.L., J.Z., D.Y., M.C.L., Z.H., T.W.S.), National University of Singapore.; Yong Loo Lin School of Medicine, Cardiovascular and Metabolic Diseases Translational Research Programme (K.W.Z.L., C.L., T.W.S.), National University of Singapore.; Institute for Functional Intelligent Materials (Y.Z., T.W.S.), National University of Singapore.; Healthy Longevity Translational Research Programme (T.W.S.), National University of Singapore.; Department of Research, National Neuroscience Institute, Singapore (C.J.Y.N., M.S., P.L., Z.H., T.W.S.).; Integrative Sciences and Engineering Programme, NUS Graduate School, Singapore (T.W.S.).
Πηγή: Circulation [Circulation] 2026 Sep; Vol. 154 (9), pp. 819-834. Date of Electronic Publication: 2026 Jun 15.
Τύπος έκδοσης: Journal Article
Γλώσσα: English
Στοιχεία περιοδικού: Publisher: Lippincott Williams & Wilkins Country of Publication: United States NLM ID: 0147763 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1524-4539 (Electronic) Linking ISSN: 00097322 NLM ISO Abbreviation: Circulation Subsets: MEDLINE
Imprint Name(s): Publication: Hagerstown, MD : Lippincott Williams & Wilkins
Original Publication: [Dallas, Tex., etc., American Heart Association, etc.]
Ιατρικοί όροι (MeSH): Calcium Channels, L-Type*/metabolism , Calcium Channels, L-Type*/genetics , Galectin 3*/metabolism , Galectin 3*/genetics , Galectin 3*/deficiency , Blood Pressure*/physiology , Blood Pressure*/drug effects , Muscle, Smooth, Vascular*/metabolism , Muscle, Smooth, Vascular*/drug effects , Hypertension*/physiopathology , Hypertension*/metabolism , Hypertension*/drug therapy , Muscle Contraction*/physiology, Animals ; Humans ; Rats, Inbred SHR ; HEK293 Cells ; Mice ; Mice, Knockout ; Rats ; Male ; Mice, Inbred C57BL
Περίληψη: Background: Fine-tuning of CaV1.2 calcium channel activity by binding proteins represents a novel mechanism for regulating smooth muscle contraction and blood pressure (BP). This study aimed to elucidate the role of Gal-3 (galectin-3), a newly identified CaV1.2-binding protein, in the pathogenesis of hypertension.
Methods: In vitro, ex vivo, and in vivo experiments involving molecular and biochemical assays, in silico prediction, patch-clamp electrophysiologic recordings, immunohistochemistry, pressure myography, and tail-cuff BP measurements were used to evaluate the molecular mechanisms by which Gal-3 binds to and elevates membrane insertion of CaV1.2 channels. The experiments were performed in transfected HEK 293 cells, isolated smooth muscle cells, and arteries from smooth muscle-specific Gal-3 knockout mice and their wild-type littermates; spontaneously hypertensive rats; or human patients. In vivo experiments involving delivery of the blocking iGal3BP (inhibitory galectin-3-binding peptide) into spontaneously hypertensive rats were performed to investigate its effect on BP.
Results: We identified Gal-3 as a novel binding partner and unexpected positive modulator of the CaV1.2 channel through binding to the intracellular II-III loop. Gal-3 increased total and surface expression, current density, and open probability of CaV1.2 channels. Both CaV1.2 and Gal-3 were upregulated in hypertensive rat aortas and human pulmonary arteries. Conditional deletion of Gal-3 in smooth muscle markedly lowered CaV1.2 protein and BP in mice. With specific binding sites identified within both Gal-3 and the CaV1.2 II-III loop, the peptide iGal3BP, designed to block CaV1.2-Gal-3 interaction, significantly reduced BP in spontaneously hypertensive rats by decreasing CaV1.2 protein expression. Repeated iGal3BP administration resulted in cumulative peptide accumulation in mesenteric arteries and produced a sustained reduction in BP, which demonstrated greater long-lasting antihypertensive efficacy compared with amlodipine and losartan. Administration of iGal3BP in combination with a negative modulatory Gal-1 mimetic peptide that mimics Gal-1-CaV1.2 interaction returned systolic BP to normotensive levels within 4 hours and lowered BP in hypertensive rats in a sustained manner for 35 days.
Conclusions: These results provide strong evidence that Gal-based CaV1.2 channel modulators are novel therapeutic pathways for normalizing BP.
Competing Interests: None.
Contributed Indexing: Keywords: calcium channels; galectin 3; hypertension; muscle contraction; peptides
Substance Nomenclature: 0 (Calcium Channels, L-Type)
0 (Galectin 3)
0 (L-type calcium channel alpha(1C))
Entry Date(s): Date Created: 20260615 Date Completed: 20260831 Latest Revision: 20260831
Update Code: 20260901
DOI: 10.1161/CIRCULATIONAHA.126.080022
PMID: 42290338
Βάση Δεδομένων: MEDLINE
Περιγραφή
ISSN:1524-4539
DOI:10.1161/CIRCULATIONAHA.126.080022