Connexin43 Deficiency Leads to Ventricular Arrhythmias by Reprogramming Proline Metabolism
Advanced Science, EarlyView.The study demonstrated that connexin43 (Cx43) knockout caused arrhythmic phenotype and decreased proline content in vitro and in vivo. Mechanistically, Cx43 interacts with the amino acid transporter SNAT2 (sodium‐dependent neutral amino acid transporter), and its deficiency disrupts proline transport and metabolism.
Hangying Ying +8 more
wiley +1 more source
Length and PKA Dependence of Force Generation and Loaded Shortening in Porcine Cardiac Myocytes
Biochemistry Research International, 2012 In healthy hearts, ventricular ejection is determined by three myofibrillar properties; force, force development rate, and rate of loaded shortening (i.e., power).
Kerry S. McDonald +3 more
doaj +1 more source
Electrophysiological effects of 5-hydroxytryptamine on isolated human atrial myocytes, and the influence of chronic beta-adrenoceptor blockade [PDF]
, 2003 <b>1.</b> 5-Hydroxytryptamine (5-HT) has been postulated to play a proarrhythmic role in the human atria via stimulation of 5-HT<sub>4</sub> receptors.
Andrew C Rankin +32 more
core +2 more sources
Advanced Science, EarlyView.This study develops a hierarchically porous hydrogel patch strategy (HPMP), based on gas‐shearing microfluidics and an aqueous two‐phase system to fabricate porous microgels as microgel‐based bioinks. The porous microgels with controllable porous structure exhibit excellent cellular behavior.
Ziyang Liu +13 more
wiley +1 more source
Myocyte cell loss and myocyte hypertrophy in the aging rat heart
Journal of the American College of Cardiology, 1986 To determine the effects of age on the myocardium, the functional and structural characteristics of the heart were studied in rats at 3, 10 to 12 and 19 to 21 months of age. Systemic arterial pressure, left ventricular pressure and its first derivative (dP/dt) and heart rate were comparable in the three animal groups.
Anversa, Piero +4 more
openaire +2 more sources
TRIM40 Drives Pathological Cardiac Hypertrophy and Heart Failure via Ubiquitination of PKN2
Advanced Science, EarlyView.This study identifies the E3 ligase TRIM40 as a key driver of pathological cardiac hypertrophy. TRIM40 binds PKN2 via its B‐box domain and, through its C29‐dependent catalytic activity, mediates K63‐linked ubiquitination of PKN2. This modification enhances PKN2 phosphorylation at Ser815, thereby driving hypertrophy.
Risheng Zhao +12 more
wiley +1 more source
A review of the molecular mechanisms underlying the development and progression of cardiac remodeling [PDF]
, 2017 Pathological molecular mechanisms involved in myocardial remodeling contribute to alter the existing structure of the heart, leading to cardiac dysfunction.
et al,, Yee, Derek
core +7 more sources
Stem Cell Reports, 2014 There is no consensus in the stem cell field as to what constitutes the mature cardiac myocyte. Thus, helping formalize a molecular signature for cardiac myocyte maturation would advance the field. In the mammalian heart, inactivation of the “fetal” TNNI
Fikru B. Bedada +8 more
doaj +1 more source
Biochemical and immunochemical analysis of the arrangement of connexin43 in rat heart gap junction membranes [PDF]
, 1990 A 43 × 10^3 M_r protein (designated connexin43 or Cx43) is a major constituent of heart gap junctions. The understanding of its arrangement in junctional membranes has been extended by means of site-directed antibodies raised against synthetic peptides ...
Laird, D. W., Revel, J.-P.
core
Modeling effects of L-type ca(2+) current and na(+)-ca(2+) exchanger on ca(2+) trigger flux in rabbit myocytes with realistic T-tubule geometries. [PDF]
, 2012 The transverse tubular system of rabbit ventricular myocytes consists of cell membrane invaginations (t-tubules) that are essential for efficient cardiac excitation-contraction coupling. In this study, we investigate how t-tubule micro-anatomy, L-type Ca(
Andrew D McCulloch +10 more
core +2 more sources