Cation transport and adenosine triphosphatase activity in rat erythrocytes: A comparison of spontaneously hypertensive rats with the normotensive Brown-Norway strain

Sergei N. Orlov, Victor V. Petrunyaka, Nikolai I. Pokudin, Yuri V. Kotelevtsev, Yuvenali V. Postnov, Jaroslav Kuneš, Josef Zicha

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

The activity of transport adenosine triphosphatases (ATPases) in saponin-treated erythrocytes as well as the passive membrane permeability for 86Rb+ (K+), 45Ca2+ uptake (in the presence of orthovanadate) and the rate of Na+-H+ exchange in intact erythrocytes were studied in spontaneously hypertensive rats (SHR), Wistar—Kyoto (WKY) and Brown-Norway (BN.lx) rats. Higher Na+, K+-ATPase activity, lower Ca2+-ATPase activity, increased passive K+ permeability and greater 45Ca2+ uptake were observed in erythrocytes from SHR compared with BN.lx rats. Similar differences in the last two parameters were also disclosed by a comparison of SHR and WKY rats. The rate of Na+-H+ exchange in SHR erythrocytes was greater than in WKY rats but equal to that of BN.lx rats. A genetic analysis did not reveal a significant correlation between Na+-H+ exchange rate and blood pressure in F2 SHR × WKY hybrids.

Original languageEnglish
Pages (from-to)977-982
Number of pages6
JournalJournal of Hypertension
Volume9
Issue number10
Publication statusPublished - Oct 1991
Externally publishedYes

Keywords

  • Calcium uptake
  • Cation leakage
  • Membrane permeability
  • Na+-H+ exchange
  • Transport adenosine triphosphatases

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