Related Experiment Video

Updated: Apr 7, 2026

Development of Recombinant Proteins to Treat Chronic Pain
10:37

Development of Recombinant Proteins to Treat Chronic Pain

Published on: April 11, 2018

10.1K

Interaction of endokinin A/B and (Mpa(6))-γ2-MSH-6-12 in pain regulation in mice

Lanxia Zhou1, Qing Yang2, Chunbo He2

  • 1The Core Laboratory of the First Affiliated Hospital, Lanzhou University, 1 Donggang West Road, Lanzhou 730000, China; Key Laboratory for Gastrointestinal Diseases of Gansu Province, Lanzhou 730000, China.

Neuropeptides
|July 7, 2015
PubMed

Insights

This study reveals complex interactions between spinal Mpa(6)-γ2-MSH-6-12 and supraspinal endokinin A/B in mouse pain regulation. Their combined effects depend on dosage and timing, influencing pain perception through distinct receptor pathways.

Area of Science:

  • Neuroscience
  • Pharmacology
  • Pain Research

Background:

  • Pain regulation involves complex interactions between spinal and supraspinal pathways.
  • The roles of Mpa(6)-γ2-MSH-6-12 (Mpa) at the spinal level and endokinin A/B (EKA/B) at the supraspinal level in pain are not fully understood.
  • Investigating these interactions can elucidate novel mechanisms for pain management.

Purpose of the Study:

  • To investigate the interactive effects of Mpa and EKA/B on pain regulation in mice.
  • To explore the underlying receptor mechanisms involved in the Mpa-EKA/B interaction.
  • To determine how NK1 and NK3 receptor antagonists influence these interactions.

Main Methods:

  • Administration of Mpa and EKA/B at varying doses and time points in mice.
  • Co-administration of Mpa with different doses of EKA/B.
  • Utilizing NK1 receptor antagonist (SR140333B) and NK3 receptor antagonist (SR142801) to probe mechanisms.
  • Assessing hyperalgesia and analgesia following drug administration.

Main Results:

  • EKA/B's effect on Mpa-induced hyperalgesia varied with dose and time, showing both weakening and enhancement.
  • Higher doses of EKA/B antagonized Mpa-induced hyperalgesia, while lower doses showed complex temporal effects.
  • SR142801 potentiated Mpa effects, while SR140333B did not, suggesting differential receptor involvement.
  • Both antagonists could block the co-administration effects of Mpa and EKA/B, indicating complex interplay.

Conclusions:

  • The interaction between spinal Mpa and supraspinal EKA/B in pain modulation is dose- and time-dependent.
  • NK1 and NK3 receptors play distinct roles in mediating these interactions.
  • These findings provide insights into the complex interplay of MrgC and NK receptors in pain pathways.
  • Understanding these interactions may lead to novel therapeutic strategies for pain management.
Keywords:
Co-injectionEndokinin A/BPain regulationγ2-MSH-6–12

More Related Videos

Spontaneous and Evoked Measures of Pain in Murine Models of Monoarticular Knee Pain08:03

Spontaneous and Evoked Measures of Pain in Murine Models of Monoarticular Knee Pain

Published on: February 22, 2019

9.0K
Assessment of Morphine-induced Hyperalgesia and Analgesic Tolerance in Mice Using Thermal and Mechanical Nociceptive Modalities07:23

Assessment of Morphine-induced Hyperalgesia and Analgesic Tolerance in Mice Using Thermal and Mechanical Nociceptive Modalities

Published on: July 29, 2014

34.3K

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...
3.1K
Opioid Receptors: Overview01:22

Opioid Receptors: Overview

Opioid receptors, including the mu (μ, MOR), delta (δ, DOR), and kappa (κ, KOR) types, belong to the rhodopsin family of G protein-coupled receptors. These receptors are located throughout the central and peripheral nervous systems and in non-neuronal tissues such as macrophages and astrocytes. Opioid receptor ligands can be categorized into agonists or antagonists. Highly selective agonists include [d-Ala2, MePhe4, Gly(ol)5]-enkephalin or DAMGO for MOR, [D-Pen2,...
6.7K