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Related Concept Videos

cAMP-dependent Protein Kinase Pathways01:25

cAMP-dependent Protein Kinase Pathways

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Cyclic Adenosine Monophosphate (cAMP) is an essential second messenger that activates protein kinase A (PKA) and regulates various biological processes. A single epinephrine molecule binds to GPCR and activates several heterotrimeric G proteins, each stimulating multiple adenylyl cyclase, amplifying the signal, and synthesizing large numbers of cAMP molecules. Small changes in cAMP concentration affect PKA activity. The binding of four cAMP molecules induces a conformational change in PKA,...
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Adrenoceptors are classified into α and ꞵ classes based on their potencies to catecholamine agonists. α-adrenoceptors show the following order of catecholamine potency:
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Adrenergic Receptors: β Subtype01:26

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β-adrenoceptors have varied sensitivities towards adrenaline, noradrenaline, and isoprenaline. The order of agonist potency is as follows:
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In skeletal muscles, acetylcholine is released by nerve terminals at the motor endplate—the point of synaptic communication between motor neurons and muscle fibers. The binding of acetylcholine to its receptors on the sarcolemma allows entry of sodium ions into the cell and triggers an action potential in the muscle cell. Thus, electrical signals from the brain are transmitted to the muscle. Subsequently, the enzyme acetylcholinesterase breaks down acetylcholine to prevent excessive...
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Actin and Myosin in Muscle Contraction01:16

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Actin and myosin are contractile proteins that form the sarcomere found in skeletal muscle tissues for regulating muscle contraction. Actin, a globular contractile protein, interacts with myosin for muscle contraction. The skeletal tissue appears striped or striated under a microscope due to the repeated arrangement of contractile proteins actin and myosin along the length of myofibrils. Dark A bands and light I bands repeat along myofibrils, and the alignment of myofibrils in the cell causes...
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Related Experiment Video

Updated: May 4, 2026

Measurement of Insulin- and Contraction-Stimulated Glucose Uptake in Isolated and Incubated Mature Skeletal Muscle from Mice
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Adiponectin action in skeletal muscle.

Ying Liu1, Gary Sweeney2

  • 1Department of Physiology, University of Toronto, Toronto, Canada.

Best Practice & Research. Clinical Endocrinology & Metabolism
|January 15, 2014
PubMed
Summary

Adiponectin offers significant metabolic and insulin-sensitizing benefits, impacting skeletal muscle glucose and fatty acid metabolism. Skeletal muscle adiponectin, acting locally and systemically, plays a crucial role in combating diabetes.

Keywords:
adiponectinadiponectin resistanceautocrineendocrinemetabolismmyokinereceptorssignalingskeletal muscletherapeutic

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Identification and Dissection of Diverse Mouse Adipose Depots
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Area of Science:

  • Metabolic regulation
  • Endocrinology
  • Skeletal muscle physiology

Background:

  • Adiponectin is known for its insulin-sensitizing and anti-diabetic properties.
  • Skeletal muscle is a key target tissue for adiponectin's metabolic regulation.
  • The mechanisms of adiponectin action, including its receptors and signaling pathways, are increasingly understood.

Purpose of the Study:

  • To elucidate the role of skeletal muscle-derived adiponectin in metabolic regulation.
  • To investigate the contribution of autocrine and endocrine adiponectin to skeletal muscle function.
  • To explore the potential link between skeletal muscle adiponectin resistance and diabetes pathogenesis.

Main Methods:

  • Review of existing literature on adiponectin signaling and metabolism.
  • Analysis of studies investigating adiponectin production in skeletal muscle.
  • Examination of evidence for adiponectin resistance in obesity and diabetes.

Main Results:

  • Skeletal muscle produces and secretes adiponectin, exerting functional effects.
  • Adiponectin influences glucose and fatty acid metabolism in skeletal muscle via autocrine and endocrine pathways.
  • Skeletal muscle adiponectin resistance may be implicated in the development of diabetes.

Conclusions:

  • Adiponectin exerts beneficial metabolic and insulin-sensitizing effects on skeletal muscle.
  • Both autocrine and endocrine actions of adiponectin contribute to its anti-diabetic effects.
  • Understanding skeletal muscle adiponectin's role is vital for diabetes management.