Expression of the beta 1 and beta 2(AMOG) subunits of the Na,K-ATPase in neural tissues: cellular and developmental distribution patterns.
We have used isoform-specific antisera against the Na,K-ATPase beta 1 (SpETb1) and beta 2(AMOG) (SpETb2) subunit isoforms in order to establish their specific cellular and subcellular localization in several developmental stages of the rat central nervous system. Immunocytochemical preparations revealed beta 1 Isoform protein in most neural cells, being predominantly located in the soma of neurons and astrocytes, with no appreciable developmental variations. In the newborn rat, beta 2(AMOG) immunoreactivity was present in cellular processes of astroglia and in the somas of neurons and decreasing in intensity with maturation until adulthood, where no beta 2 isoform was detected in neurons. The differential location of these isoforms, both developmentally and at the cellular level suggest a complex regulation of their genes expression and mechanisms of subcellular distribution, as well as functional differences.
Lecuona
E
E
Departamento de Bioquímica y Biología Molecular, Universidad de La Laguna, Tenerife, Spain.
Luquín
S
S
Avila
J
J
García-Segura
L M
LM
Martín-Vasallo
P
P
D000251:Adenosine Triphosphatases; D000818:Animals; D015153:Blotting, Western; D027682:Cation Transport Proteins; D015816:Cell Adhesion Molecules, Neuronal / Q000032:analysis*; D002490:Central Nervous System / Q000201:enzymology* / Q000254:growth & development; D007150:Immunohistochemistry; D008297:Male; D010446:Peptide Fragments / Q000032:analysis*; D051381:Rats; D017208:Rats, Wistar; D000254:Sodium-Potassium-Exchanging ATPase / Q000032:analysis* / Q000737:chemistry
C504192:Atp1b2 protein, rat; D027682:Cation Transport Proteins; D015816:Cell Adhesion Molecules, Neuronal; D010446:Peptide Fragments; D000251:Adenosine Triphosphatases; D000254:Sodium-Potassium-Exchanging ATPase