Rehashing endocannabinoid antagonists: can we selectively target the periphery to safely treat obesity and type 2

Mary-Elizabeth Patti1

  • 1Joslin Diabetes Center and Harvard Medical School, Boston, Massachusetts 02215, USA. mary.elizabeth.patti@joslin.harvard.edu

Insights

Blocking peripheral cannabinoid receptors may offer a new therapeutic strategy for obesity and type 2 diabetes. This approach avoids the adverse side effects associated with targeting the central nervous system, unlike previous treatments.

Area of Science:

  • Metabolic research
  • Endocrinology
  • Pharmacology

Background:

  • The endocannabinoid system regulates appetite, body weight, and metabolism.
  • This system is often overactive in obesity and type 2 diabetes.
  • Previous attempts to target this system with rimonabant caused adverse central nervous system effects.

Purpose of the Study:

  • To investigate the potential of selectively blocking peripheral cannabinoid receptors as a therapeutic strategy.
  • To evaluate a novel approach for managing obesity and related metabolic complications.

Main Methods:

  • Selective blockade of peripheral cannabinoid receptors.
  • Evaluation of therapeutic efficacy in preclinical or clinical models (details not provided in abstract).

Main Results:

  • Selective blockade of peripheral cannabinoid receptors shows promise.
  • This approach may overcome the limitations of earlier treatments targeting the central nervous system.

Conclusions:

  • Targeting peripheral cannabinoid receptors represents a potential novel therapeutic avenue.
  • This strategy may offer a safer alternative for treating metabolic disorders like obesity and type 2 diabetes.

Related Concept Videos

G Protein-coupled Receptors01:15

G Protein-coupled Receptors

G Protein-Coupled Receptors or GPCRs are membrane-bound receptors that transiently associate with heterotrimeric G proteins and induce an appropriate response to sensory stimuli such as light, odors, hormones, cytokines, or neurotransmitters.
GPCRs are also called heptahelical, 7TM, or serpentine receptors, and consist of seven (H1-H7) transmembrane alpha-helices that span the bilayer to form a cylindrical core. The transmembrane helices are connected by three extracellular loops and three...
14.1K
Spare Receptors01:30

Spare Receptors

Some receptors remain unoccupied even when an agonist produces a maximal response. Such empty ones are called spare receptors. In presence of spare receptors the maximum effect of an agonist drug is achieved with fewer than 100% of the receptors being occupied. To determine the presence of spare receptors, scientists often compare the concentration of the drug needed to produce 50% of the maximum effect (EC50) with the concentration of the drug needed to occupy 50% of the receptors (Kd). If the...
4.9K
Adrenergic Agonists: Indirect-Acting Agents01:25

Adrenergic Agonists: Indirect-Acting Agents

Indirect-acting adrenergic agonists potentiate the effects of endogenous catecholamines through different mechanisms without directly binding to adrenoceptors.
One mechanism involves depleting stored catecholamines by displacing them from synaptic vesicles. These agents, known as "displacers," are transported into vesicles at the expense of noradrenaline. Examples include amphetamine and tyramine, which lack a catechol moiety, resulting in prolonged action, improved oral...
2.8K
Regulation of Food Intake01:30

Regulation of Food Intake

Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...
2.8K
Pharmacokinetics in Obese Patients: Drug Absorption and Distribution01:25

Pharmacokinetics in Obese Patients: Drug Absorption and Distribution

Obesity significantly alters the pharmacokinetic processes of drug absorption and distribution, presenting unique challenges in medical treatment. The increased fat tissue and decreased lean muscle in obese individuals can significantly affect how drugs are absorbed into the body and distributed across different tissues. This alteration can lead to variances in the effectiveness and safety of medications, necessitating adjustments in dosing or drug selection for obese patients.One notable...
440
Glucagon-like Receptor Agonists01:24

Glucagon-like Receptor Agonists

Incretins include glucagon-like peptide-1 (GLP-1) and glucose-dependent insulinotropic polypeptide (GIP), which stimulate insulin secretion post-meals. In type 2 diabetes, GIP's efficacy is reduced, making GLP-1 a viable drug target. GIP originates from preproGIP.
GLP-1, when administered in high doses intravenously, triggers insulin secretion, inhibits glucagon release, slows gastric emptying, reduces food intake, and restores normal insulin secretion. However, its rapid inactivation by...
1.3K