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Preconditioning with cobalt chloride modifies pain perception in mice
Teodora Alexa1, Andrei Luca1, Andrei Dondas1
1Center for the Study and Therapy of Pain, 'Grigore T. Popa' University of Medicine and Pharmacy, Iaşi, Moldavia 70115, Romania.
Experimental and Therapeutic Medicine
|March 18, 2015
Summary
Cobalt chloride (CoCl2) preconditioning shows dual pain effects in mice. While initially increasing pain sensitivity, it later reduces inflammatory pain, alongside known protective benefits.
Area of Science:
- Pharmacology
- Neuroscience
- Pain Research
Background:
- Cobalt chloride (CoCl2) mimics hypoxia, enhancing cellular tolerance to ischemia and injury.
- CoCl2 is known for its neuroprotective, cardioprotective, and renoprotective properties.
Purpose of the Study:
- To investigate the effects of three-week CoCl2 hypoxic preconditioning on pain perception, activity, and coordination in mice.
- To determine the impact of CoCl2 on thermonociception, somatic, and visceral inflammatory pain.
Main Methods:
- Mice were administered CoCl2 for three weeks.
- Thermonociception was assessed using hot plate and tail flick tests.
- Somatic and visceral inflammatory pain were evaluated via the formalin test and writhing test.
- Locomotor activity and coordination were also monitored.
Main Results:
- CoCl2 administration induced pronociception in hot plate and tail flick tests after one and two weeks, respectively.
- Thermal hyperalgesia was observed in the first week but resolved by the study's end.
- CoCl2 preconditioning reduced inflammatory pain responses in the second phase of the formalin test (orofacial and paw models).
- No significant effects were noted on the first phase of the formalin test or the writhing test.
Conclusions:
- CoCl2 hypoxic preconditioning exhibits a dual effect on pain modulation.
- These pain-related effects should be considered alongside the established protective benefits of CoCl2.
