Journal of Histochemistry and Cytochemistry
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Journal of Histochemistry and Cytochemistry, Vol. 46, 975-976, August 1998, Copyright © 1998, The Histochemical Society, Inc.

BRIEF REPORT

Cytochemical Localization of Ouabain-sensitive, K+-dependent p-Nitrophenylphosphatase Activity in the Choroid Plexus of Normal and Reserpinized Guinea Pigs

Chun-Fu Daia and Naoyuki Kanohb
a Department of Otorhinolaryngology, Eye Ear Nose and Throat Hospital, Shanghai Medical University, Shanghai, P.R. China
b Department of Otolaryngology, Hyogo College of Medicine, Hyogo, Japan

Correspondence to: Naoyuki Kanoh, Dept. of Otolaryngology, Hyogo College of Medicine, 1-1 Mukogawacho, Nishinomiya, Hyogo 663, Japan.

High doses of reserpine induce depletion of biogenic amines. The K-NPPase activity of choroid plexus was determined after one-shot reserpine administration using cerium-based cytochemistry. In normal untreated animals, reaction product was found on the microvilli of the choroidal epithelium but was almost undetectable 3 and 7 days after reserpinization. At 20 days after reserpinization, however, it was detectable. These findings suggested that reserpine decreased the choroidal Na,K-ATPase activity, and that catecholamines might be essential to maintain normal choroidal Na,K-ATPase activity. (J Histochem Cytochem 46: 975–976, 1998)

Key Words: K-NPPase cytochemistry, Na,K-ATPase, catecholamine, reserpine, choroid plexus, guinea pig


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