Abstract:
:Imbalances in glutamatergic signaling have been proposed as the cause of several neurological disturbances. The use of MK-801, an N-methyl-D-aspartate (NMDA) receptor antagonist, to mimic features of these neurological disorders is effective both in mammals and in fish. However, the variability of the subunits comprising the NMDA receptor during development alters the pharmacokinetic properties of the receptor and leads to different responses to this drug. Here, we evaluated the locomotor response of zebrafish to MK-801 (1, 5, and 20 μM) through the development (30 days postfertilization [dpf] to 2 years postfertilization [ypf]). The NMDA receptor subunit gene expression was also analyzed through the development (7 dpf to 2 ypf). Zebrafish displayed an age-related response to MK-801 with a higher response at 60 and 120 dpf. The magnitude of hyperlocomotion promoted by MK-801 seems to be less powerful for zebrafish in relation to rodents. The verification of expression levels in zebrafish NMDA receptor subunits shows that NR1.1 had a slight reduction throughout the development, while the NR2 subunits, especially NR2A.2 and NR2C.1, vary their expression levels according to the stage of development. The time-specific locomotor response to MK-801 through the development could be a consequence of differential NMDA receptor subunit expression. This result of developmental response to MK-801 is a crucial component in the consolidation of zebrafish as a suitable model to study glutamatergic neurotransmission in early phases.
journal_name
Zebrafishjournal_title
Zebrafishauthors
Menezes FP,Kist LW,Bogo MR,Bonan CD,Da Silva RSdoi
10.1089/zeb.2014.1018subject
Has Abstractpub_date
2015-04-01 00:00:00pages
137-43issue
2eissn
1545-8547issn
1557-8542journal_volume
12pub_type
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