The role of the superior cervical ganglia in the nocturnal rise of pineal type-II thyroxine 5'-deiodinase activity |
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| Authors: | M Murakami M A Greer S Hjulstad S E Greer K Tanaka |
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| Affiliation: | Department of Medicine, Oregon Health Sciences University, Portland 97201. |
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| Abstract: | Superior cervical ganglionectomy (SCGx) abolished the nocturnal rise in pineal type-II thyroxine 5'-deiodinase (5'-D) activity in both euthyroid and hypothyroid rats. Isoproterenol induced at least as great a rise in diurnal pineal 5'-D in SCGx as in intact rats. These data suggest that beta-adrenergic stimulation through the superior cervical ganglia is essential for the nocturnal rise in pineal 5'-D activity. |
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