We studied the effect of neonatal treatment with pharmacological preparations (Semax and buspiron) and solvents (distilled water and physiological saline) on the pain threshold in 3-4-month-old mice of 6 genotypes. Neonatal administration of the solvent (nociceptive stimulation) decreased pain thresholds in DBA/2, 101/HY, and RSB males, but not in female mice and animals of other strains. Neonatal administration of Semax significantly increased pain thresholds in adult DBA/2 and 101/HY males compared to those in animals neonatally treated with the solvent. Injection of buspiron in the neonatal period decreased pain thresholds in RLB males.
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| http://dx.doi.org/10.1023/b:bebm.0000042703.99534.40 | DOI Listing |
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