Calcium-binding proteins in the spiral ganglion of the monkey, Callithrix jacchus.
Calcium-binding proteins can act as intermediaries between changing levels of free intracellular calcium ions and the physiological response of neurons. Some of these proteins, among them calbindin (CB), calretinin (CR) and parvalbumin (PV), can act as calcium buffers. A survey of previous studies in rodents and human fetuses leads to the impression that many spiral ganglion cells co-express CB, CR, and PV. The findings of the present study suggest that, in the adult marmoset, the expression of CB is restricted to a small number of cells, most likely type II ganglion cells, and that at least some of the numerous type I ganglion cells co-express CR and PV. In the neonate marmoset, large numbers of putative type I ganglion cells from the apical cochlear turn transiently expressed a light and granular labeling for CB-like immunoreactivity, in addition to the cells we believe to be type II ganglion cells exhibiting a strong and solid CB-like staining. The spiral ganglion cells in all developmental stages co-expressed the mitochondrial enzyme cytochrome oxidase. Furthermore, a small population of CB-LI axons of unknown origin was found to terminate near the CB-immunoreactive ganglion cells.
Spatz
W B
WB
Unit for Morphological Brain Research, University of Freiburg, FRG.
Löhle
E
E
D000818:Animals; D000831:Animals, Newborn; D064032:Calbindin 2; D064026:Calbindins; D002144:Callithrix; D002452:Cell Count; D003576:Electron Transport Complex IV / Q000378:metabolism; D005629:Frozen Sections; D007150:Immunohistochemistry; D009419:Nerve Tissue Proteins / Q000096:biosynthesis / Q000378:metabolism; D009474:Neurons / Q000166:cytology / Q000378:metabolism*; D009925:Organ of Corti / Q000166:cytology / Q000378:metabolism; D010320:Parvalbumins / Q000096:biosynthesis / Q000378:metabolism*; D064030:S100 Calcium Binding Protein G / Q000096:biosynthesis / Q000378:metabolism*; D013136:Spiral Ganglion / Q000166:cytology / Q000378:metabolism*; D013316:Stria Vascularis / Q000166:cytology / Q000378:metabolism
C576764:CALB2 protein, human; D064032:Calbindin 2; D064026:Calbindins; D009419:Nerve Tissue Proteins; D010320:Parvalbumins; D064030:S100 Calcium Binding Protein G; D003576:Electron Transport Complex IV