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Related Concept Videos

Analgesia and Pain Management01:25

Analgesia and Pain Management

Pain is critical to various clinical pathologies, provoking an urgent need for effective management. Pain, whether acute or chronic, is a complex neurochemical process. Its alleviation depends on the type, with nonopioid analgesics effective for mild to moderate pain, such as musculoskeletal or inflammatory pain, while neuropathic pain responds best to anticonvulsants, tricyclic antidepressants, or serotonin/norepinephrine reuptake inhibitors. For severe acute or chronic pain, opioids may be...
Nociception01:44

Nociception

Nociception—the ability to feel pain—is essential for an organism’s survival and overall well-being. Noxious stimuli such as piercing pain from a sharp object, heat from an open flame, or contact with corrosive chemicals are first detected by sensory receptors, called nociceptors, located on nerve endings. Nociceptors express ion channels that convert noxious stimuli into electrical signals. When these signals reach the brain via sensory neurons, they are perceived as pain. Thus, pain helps the...
Acute Inflammation III: Local and Systemic Effects01:25

Acute Inflammation III: Local and Systemic Effects

Acute inflammation produces a coordinated set of local and systemic changes that limit injury, eliminate pathogens, and initiate repair. These responses arise within minutes of infection, trauma, or chemical insult and are driven by vascular alterations and leukocyte-derived mediators. When the stimulus resolves, the reaction typically abates within days.Local EffectsAt the site of injury, arteriolar vasodilation increases blood flow, resulting in redness and warmth. Simultaneously, increased...
Antianginal Drugs: Nitrates and β-Blockers01:16

Antianginal Drugs: Nitrates and β-Blockers

In cardiovascular health, antianginal drugs combat angina pectoris — a condition marked by chest pain owing to diminished blood flow to the heart.
Organic nitrates,  such as nitroglycerin, play a pivotal role. Once metabolized, they liberate nitric oxide, a molecular marvel. Nitric oxide triggers guanylyl cyclase and augments cGMP production. This biochemical cascade orchestrates the relaxation of vascular smooth muscles, ushering in vasodilation and enhancing coronary blood flow. Administered...
Local Anesthetics: Differential Sensitivity of Nerve Fibers01:24

Local Anesthetics: Differential Sensitivity of Nerve Fibers

Local anesthetics (LAs) block the sodium channels of nerve trunks, sensory nerve endings, and neuromuscular junctions. Although LAs can block all kinds of nerves, the sensitivity of nerve fibers differs according to nerve types and structures. LAs are known to block myelinated fibers faster than unmyelinated ones. Also, they block pain or sensory neurons at low concentrations without affecting the motor neurons involved in muscle contractions. This helps relieve labor pain without affecting the...
Opioid Analgesics: Synthetic and Semisynthetic Opioids01:15

Opioid Analgesics: Synthetic and Semisynthetic Opioids

Synthetic and semisynthetic opioids are pivotal in pain management and tackling opioid addiction. Semisynthetic opioids, including morphinans (morphine derivatives), oxycodone, oxymorphone, hydrocodone, and hydromorphone, have improved pharmacokinetic profiles compared to morphine. Additionally, heroin and 6-MAM (6-Monoacetylmorphine) show better CNS penetration than morphine due to heightened lipid solubility. Hydromorphone, a potent opioid, undergoes hepatic metabolism to form the active...

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Related Experiment Video

Updated: May 24, 2026

Analysis of Raw and Processed Cyperi Rhizoma Samples Using Liquid Chromatography-Tandem Mass Spectrometry in Rats with Primary Dysmenorrhea
07:36

Analysis of Raw and Processed Cyperi Rhizoma Samples Using Liquid Chromatography-Tandem Mass Spectrometry in Rats with Primary Dysmenorrhea

Published on: December 23, 2022

α-terpineol reduces mechanical hypernociception and inflammatory response.

Makson G B de Oliveira1, Rosemarie B Marques, Michele F de Santana

  • 1Department of Physiology, Federal University of Sergipe, Aracaju, SE, Brazil.

Basic & Clinical Pharmacology & Toxicology
|March 3, 2012
PubMed
Summary
This summary is machine-generated.

α-Terpineol (TPN) demonstrates significant antihypernociceptive and anti-inflammatory effects in preclinical models. This natural compound effectively reduced pain and inflammation, suggesting its potential for developing new therapeutic drugs.

Related Experiment Videos

Last Updated: May 24, 2026

Analysis of Raw and Processed Cyperi Rhizoma Samples Using Liquid Chromatography-Tandem Mass Spectrometry in Rats with Primary Dysmenorrhea
07:36

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Published on: December 23, 2022

Area of Science:

  • Pharmacology
  • Natural Products Chemistry
  • Pain Management

Background:

  • α-Terpineol (TPN) is a non-toxic monoterpene alcohol found in essential oils.
  • Hypernociception and inflammation are significant health concerns.
  • Understanding the therapeutic potential of natural compounds is crucial.

Purpose of the Study:

  • To evaluate the antihypernociceptive activity of α-Terpineol (TPN) in mice.
  • To investigate the anti-inflammatory effects of TPN.
  • To explore the mechanisms underlying TPN's activity.

Main Methods:

  • Mechanical hypernociception models induced by carrageenan (CG), tumor necrosis factor-α (TNF-α), prostaglandin E₂ (PGE₂), and dopamine (DA) in mice.
  • Carrageenan-induced pleurisy model to assess anti-inflammatory effects.
  • Lipopolysaccharide (LPS)-induced nitrite production assay in murine macrophages.

Main Results:

  • TPN (25-100 mg/kg) significantly inhibited mechanical hypernociception induced by CG, TNF-α, PGE₂, and DA.
  • TPN treatment reduced neutrophil influx in the carrageenan-induced pleurisy model.
  • TPN dose-dependently reduced nitrite production in LPS-stimulated macrophages in vitro.

Conclusions:

  • TPN exhibits potent antinociceptive and anti-inflammatory properties.
  • The findings suggest TPN modulates key inflammatory mediators.
  • TPN shows promise as a potential therapeutic agent for pain and inflammatory conditions.