Results 51 to 60 of about 19,974 (255)

Cycling Cross-Bridges Contribute to Thin Filament Activation in Human Slow-Twitch Fibers

Frontiers in Physiology, 2020
It has been shown that not only calcium but also strong binding myosin heads contribute to thin filament activation in isometrically contracting animal fast-twitch and cardiac muscle preparations. This behavior has not been studied in human muscle fibers
Alfredo Jesus López-Dávila, Joseph M. Chalovich, Stefan Zittrich, Birgit Piep, Faramarz Matinmehr, Andras Málnási-Csizmadia, Anna Á. Rauscher, Theresia Kraft, Bernhard Brenner, Robert Stehle   +9 more
doaj   +1 more source

Calcium currents in a fast-twitch skeletal muscle of the rat. [PDF]

The Journal of general physiology, 1983
Slow ionic currents were measured in the rat omohyoid muscle with the three-microelectrode voltage-clamp technique. Sodium and delayed rectifier potassium currents were blocked pharmacologically. Under these conditions, depolarizing test pulses elicited an early outward current, followed by a transient slow inward current, followed in turn by a late ...
P L, Donaldson, K G, Beam
openaire   +2 more sources

Effects of intermittent exposure to hypobaria and cold on the microarchitecture and morphofunctional profile of rat gastrocnemius muscle

The Anatomical Record, EarlyView.
Abstract Intermittent hypobaric hypoxia (IHH) enhances oxygen transport, muscle metabolism, and cardiovascular health; however, the combined effects of hypobaria and cold are less well understood. Exposure to these stressful environmental factors, even intermittently, can affect skeletal muscle due to its plasticity, thereby altering its metabolic and ...
Garoa Santocildes, Teresa Pagès, Ginés Viscor, Joan Ramon Torrella   +3 more
wiley   +1 more source

Enhancing Meat Quality Through Dietary Fiber: Insights Into the Gut Microbiota‐Derived Short‐Chain Fatty Acids‐Muscle Axis

Animal Research and One Health, EarlyView.
Dietary fiber (DF) modulates meat quality through the gut‐muscle axis by reshaping gut microbiota, improving intestinal integrity, reducing inflammation, and regulating muscle metabolism. These mechanisms influence muscle fiber characteristics and post‐mortem biochemistry, thereby enhancing tenderness, juiciness, color, flavor, and nutritional value of
Zeshan Zulfiqar, Muhammad Arslan Asif, Layla Al‐Mitib, Nabeela Ashiq, Haojie Wang, Yalei Cui, Boshuai Liu, Shucheng Huang, Yinghua Shi   +8 more
wiley   +1 more source

Insights into the heterogeneous muscle lipidome of dysferlin-deficient mice: effects of age, muscle type, and sex

Skeletal Muscle
Dysferlinopathy is an age-dependent muscular dystrophy caused by loss of the membrane-associated protein dysferlin. Disease severity increases with age and selectively affects specific muscle groups, yet the molecular basis for this vulnerability remains
Stacey N. Keenan, Jackie Bayliss, Olivia Lee, Erin M. Lloyd, Peter J. Meikle, Miranda D. Grounds, Matthew J. Watt   +6 more
doaj   +1 more source

SESN2 prevents the slow-to-fast myofiber shift in denervated atrophy via AMPK/PGC-1α pathway

Cellular & Molecular Biology Letters, 2022
Background Sestrin2 (SESN2), a stress-inducible protein, has been reported to protect against denervated muscle atrophy through unfolded protein response and mitophagy, while its role in myofiber type transition remains unknown.
Xiaofan Yang, Pingping Xue, Zhenyu Liu, Wenqing Li, Chuyan Li, Zhenbing Chen   +5 more
doaj   +1 more source

Chemical energetics of slow- and fast-twitch muscles of the mouse. [PDF]

The Journal of general physiology, 1982
The energy utilization associated with contraction was measured in isolated slow- and fast-twitch muscles of the mouse at 20 degrees C. The extent of this utilization was estimated from either the extent of high-energy phosphate splitting occurring during contraction (the initial chemical change, delta approximately P init) or from the extent of ...
M T, Crow, M J, Kushmerick
openaire   +2 more sources

Anatomy of the Soft Palate and Its Role in Upper Airway Function: A Narrative Review

Clinical Anatomy, EarlyView.
ABSTRACT The soft palate is a complex anatomical structure, located at the posterior aspect of the oral and nasal cavities, able to dynamically create valve closure of the nasal and the oral cavities. Its precise movement is critical for speech, swallowing, and respiration. Despite its functional importance, detailed characterization of its constituent
James C. D. Miller, Nikki Mills, Ho‐Fung Chan, Alys R. Clark, S. Ali Mirjalili   +4 more
wiley   +1 more source

Slow sodium channel inactivation in rat fast‐twitch muscle.

The Journal of Physiology, 1987
1. Voltage‐clamp Na+ currents (INa) were measured in rat fast‐twitch fibres using the loose‐patch‐clamp technique. Changes in the conditioning membrane potential produced slow changes in the peak INa elicited by short test depolarizations, due to a slow inactivation process. 2. Inactivation was increased by application of steady depolarizing potentials
Simoncini, L., Stühmer, W.
openaire   +4 more sources

Fhod3 in zebrafish supports myofibril stability during growth of embryonic skeletal muscle

Developmental Dynamics, EarlyView.
Abstract Background Actin filament organization in cardiomyocytes critically depends on the formin Fhod3, but a role for Fhod3 in skeletal muscle development has not yet been described. Results We demonstrate here that in zebrafish mutated for one of two fhod3 paralog genes, fhod3a, skeletal muscle of the trunk appears normal through 2 days post ...
Aubrie Russell, Tracy Eng, Jeffrey D. Amack, David Pruyne   +3 more
wiley   +1 more source