The dielectric behaviour of interconnected cells is simulated by taking into account the 'real' shape. In previous work, we derived the polarizability of non-spherical, shelled, particles by solving the related integral equation using a spectral decomposition. The permittivity and impedance modulus spectra of gap junction connected cells are compared with those provided by a suspension of ellipsoids (prolate spheroids) having the same shape as the individual cells connected through gap junction, and the same volume fraction. This approach aims to provide a microscopic hint on the effect of the closing of gap junctions reported on the dielectric behaviour of ischaemic tissues, as well as to offer a rough approximation of a tissue by considering high concentrations of oriented gap junction connected cells.
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http://dx.doi.org/10.1088/0031-9155/47/2/312 | DOI Listing |
Int Immunopharmacol
January 2025
Department of Pharmacy, Shenzhen Children's Hospital, Shenzhen, Guangzhou, China. Electronic address:
Doxorubicin-induced cardiotoxicity (DIC) is one of the most severe side effects of doxorubicin, yet the underlying mechanisms remain incompletely understood. Our results showed that Neutrophil extracellular traps (NETs) accumulated in plasma and cardiac tissue after doxorubicin treatment. The inhibition of NETs formation by Pad4 gene ablation significantly attenuated doxorubicin-induced arrhythmia, prolonged survival time and reduced the levels of Troponin T (cTnT) and creatine kinase MB (CK-MB) in mice.
View Article and Find Full Text PDFHellenic J Cardiol
January 2025
Department of Cardiac Surgery Research, Lankenau Institute for Medical Research, Main Line Health, Wynnewood, PA, 19096, USA; Department of Cardiac Surgery, Lankenau Heart Institute, Main Line Health, Wynnewood, PA, 19096, USA. Electronic address:
Objective: Thoracic Aortic Aneurysm (TAA) represents an aortic pathology that is caused by the deranged integrity of the three layers of the aortic wall, and is related to severe morbidity and mortality. Consequently, it is crucial to identify the biomarkers implicated in the pathogenesis and biology of TAA. The aim of the current computational study was to assess the differential gene expression profile of the gap junction proteins (GJPs) in patients with TAA in order to identify novel potential biomarkers for the diagnosis and treatment of this disease.
View Article and Find Full Text PDFEur J Pharmacol
January 2025
State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica & Neuroscience Center, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100050, China; Hunan University of Traditional Chinese Medicine & Hunan Engineering Technology Center of Standardization and Function of Chinese Herbal Decoction Pieces, Changsha 410208 Hunan, China. Electronic address:
Background: Depression is a leading chronic mental illness worldwide, characterized by anhedonia and pessimism. Connexin is a kind of widely distributed protein in the body. Connexin 43 (Cx43) plays an important role in the pathogenesis of depression.
View Article and Find Full Text PDFJ Biol Chem
January 2025
Department of Biological Sciences, Moravian University, 1200 Main Street, Bethlehem, PA 18018, USA. Electronic address:
Phosphorylation of connexin 43 (Cx43) is an important regulatory mechanism of gap junction (GJ) function. Cx43 is modified by several kinases on over 15 sites within its ∼140 amino acid-long C-terminus (CT). Phosphorylation of Cx43CT on S255, S262, S279, and S282 by ERK has been widely documented in several cell lines, by many investigators.
View Article and Find Full Text PDFBurns
December 2024
Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, Clinical Sciences Building, 11, Mandalay Road, 308232, Singapore; Skin Research Institute Singapore, Level 17, Clinical Sciences Building, 11, Mandalay Road, 308232, Singapore; National Skin Centre Singapore, 1 Mandalay Rd, 308205, Singapore. Electronic address:
Burns are dynamic injuries characterized by an initial zone of necrosis that progresses to compromise surrounding tissue. Acute inflammation and cell death are two main factors contributing to burn progression. These processes are modulated by Connexin43 (Cx43) hemichannels and gap junctions in burns and chronic wounds.
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