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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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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:
Isoprenaline > Adrenaline > Noradrenaline
Neurotransmitter binding to these receptors causes activation of adenylyl cyclase resulting in increased concentrations of cAMP and modulation of calcium ion channels within the cell. They are further classified into β1, β2, and β3 subtypes.
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GPCRs Regulate Adenylyl Cylase Activity01:09

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Some GPCRs transmit signals through adenylyl cyclase (AC), a transmembrane enzyme. AC helps synthesize second messenger cyclic adenosine monophosphate (cAMP). AC catalyzes cyclization reaction and converts ATP to cAMP by releasing a pyrophosphate. The pyrophosphate is further hydrolyzed to phosphate by the enzyme pyrophosphatase, which drives cAMP synthesis to completion. However, cAMP is rapidly degraded to 5′ AMP by the enzymes phosphodiesterase (PDE), preventing overstimulation of...
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Thermoregulation01:26

Thermoregulation

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The human body has a sophisticated thermoregulation system that employs negative feedback mechanisms to maintain an optimal core temperature. When the core temperature drops, peripheral and central thermoreceptors send signals to the hypothalamus, activating the heat-promoting center. This center triggers several responses aimed at increasing the core temperature. First, vasoconstriction reduces the flow of warm blood from internal organs to the skin so that the heat is not lost from the skin,...
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Adrenergic Receptors: ɑ Subtype01:31

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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 (Adrenoceptors): Classification01:27

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Adrenergic receptors, or adrenoceptors, respond to the autonomic neurotransmitter noradrenaline and other endogenous catecholamine agonists. They are classified into two main families, α and β, based on their pharmacological response and are further subdivided depending on their location, elicited response, and affinity to specific agonists or antagonists.
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Related Experiment Video

Updated: Apr 20, 2026

Measuring the Rate of Lipolysis in Ex Vivo Murine Adipose Tissue and Primary Preadipocytes Differentiated In Vitro
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Adenosine activates thermogenic adipocytes.

Amy K Rines1, Francisco Verdeguer1, Pere Puigserver1

  • 1Department of Cancer Biology, Dana-Farber Cancer Institute and Department of Cell Biology, Harvard Medical School, Boston, MA 02215, USA.

Cell Research
|December 3, 2014
PubMed
Summary
This summary is machine-generated.

Adenosine activates brown and beige fat, offering potential anti-obesity and anti-diabetic benefits. This novel mechanism acts via the adenosine A2A receptor, presenting new therapeutic avenues.

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Area of Science:

  • Metabolism
  • Endocrinology
  • Molecular Biology

Background:

  • Brown and beige adipose tissues (BAT) are key regulators of energy expenditure.
  • Activation of these fat depots shows promise for combating obesity and diabetes.

Purpose of the Study:

  • To identify novel activators of brown and beige fat.
  • To elucidate the molecular mechanisms underlying fat activation.

Main Methods:

  • In vivo and in vitro studies were conducted.
  • Adenosine signaling pathways were investigated.

Main Results:

  • Adenosine was identified as a potent activator of brown and beige fat.
  • This activation was mediated through the adenosine A2A receptor.

Conclusions:

  • Adenosine represents a novel therapeutic target for metabolic disorders.
  • Targeting adenosine A2A receptors could offer a new strategy for obesity and diabetes treatment.