Netrin-1 receptor-deficient mice show age-specific impairment in drug-induced locomotor hyperactivity but still self-administer methamphetamine
The mesocorticolimbic dopamine system undergoes significant reorganization of neuronal connectivity and functional refinement during adolescence. Deleted in colorectal cancer (DCC), a receptor for the guidance cue netrin-1, is involved in this reorganization. Previous studies have shown that adult mice with a heterozygous (het) loss-of-function mutation in DCC exhibit impairments in sensitization and conditioned place preference (CPP) to psychostimulants. However, the commonly abused psychostimulant methamphetamine (METH) has not been assessed, and the role of DCC in drug self-administration remains to be established.
Using dcc het mice and wildtype (WT) littermates, we extended previous findings on dcc haplodeficiency by examining self-administration of METH in adult mice, including cue-induced drug seeking following abstinence. We also examined hyperactivity, sensitization, and CPP to a METH-paired context in adult and adolescent mice.
While adult dcc het mice expressed largely similar METH self-administration and cue-induced drug seeking as WT littermates, they failed to modulate responding according to dose of METH. Compared to WT, both adult and adolescent dcc het mice expressed impaired locomotor hyperactivity to acute METH but nevertheless showed comparable behavioral sensitization. Conditioned hyperactivity increased with age in WT but not in dcc het mice.
Impaired METH-induced hyperactivity and dose-related responding in adult dcc het mice suggest that reduced DCC alters METH-related behaviors. Adolescence is identified as a vulnerable period during which impairment in hyperactivity due to reduced DCC can be overcome with repeated METH injections. Nevertheless, DCC appears to have a somewhat limited role in METH-consumption and seeking following abstinence.
KeywordsMethamphetamine Self-administration Conditioning Mouse
- Brown RM, Short JL, Lawrence AJ (2010) Identification of brain nuclei implicated in cocaine–primed reinstatement of conditioned place preference: a behavior dissociable from sensitization. PLoS One 5:1–13Google Scholar
- Chen H, Yang Y, Yeh T, Cherng C, Hsu H, Hsiao S, Yu L (2003) Methamphetamine–induced conditioned place preference is facilitated by estradiol pretreatment in female mice. Chinese J Physiol 46:169–174Google Scholar
- Chesworth RM, Brown RM, Kim JH, Lawrence AJ (2013). The metabotropic glutamate 5 receptor modulates extinction and reinstatement of methamphetamine-seeking in mice. PLoS One, in pressGoogle Scholar
- Fazeli A, Dickinson SL, Hermistonf ML, Tigne RV, Steen I, R. G, Small CG, Rayburnf H (1997) Phenotype of mice lacking functional Deleted in colorectal cancer (Dcc) gene. PROBE, 1:1–8Google Scholar
- Kasanetz F, Lafourcade M, Deroche-Gamonet V, Revest JM, Berson N, Balado E et al (2013) Prefrontal synaptic markers of cocaine addiction-like behavior in rats. Mol Psych 18:729–737Google Scholar
- Keino-Masu K, Masu M, Hinck L, Leonardo ED, Chan S-Y, Culotti JG, Tessier-Lavigne M (1996) Deleted in colorectal cancer (DCC) encodes a netrin receptor. Cell 87:175–185Google Scholar