Taurine 2 pp 551-560 | Cite as

Regulation of Ca2+ Transport by Insulin and Taurine

Interaction at the Level of the Na+-Ca2+ Exchanger
  • Stephen W. Schaffer
  • Khanh Nguyen
  • Cherry Ballard
  • Nichelle Gardner
  • Junichi Azuma
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 403)

Abstract

In 1983 Lampson et al. 16 and Tokunaga et al. 31 introduced the concept that an interaction must exist between the actions of taurine and those of insulin. The initial studies examining this question focused on the metabolic actions of insulin. Tokunaga et al. 31 found that taurine suppressed insulin secretion in nondiabetic pancreatic islets, suggesting that taurine might serve as a physiological regulator of insulin secretion and plasma glucose levels. They also found that taurine levels increased significantly in diabetic islets, implying that taurine might contribute to the state of hypoinsulinemia and hyperglycemia. Lampson et al. 16 also concluded that taurine influenced plasma glucose levels, but their studies linked the hypoglycemic actions of taurine to a potentiation of insulin-mediated glucose uptake. Lampson et al. 16 also reported that taurine promoted several other insulin sensitive reactions, implying that taurine either facilitated the interaction of insulin with its receptor or increased the production of a putative second messenger of insulin. Subsequent studies revealed that taurine could interact directly with the insulin receptor15, 20. This interaction appeared to be quite specific since insulin was capable of displacing taurine from its binding sites20. Based on these data, Maturo and Kulakowski20 suggested that taurine might exhibit insulin-mimetic activity. However, this notion is inconsistent with a recent observation by Schaffer et al. 30 that insulin, but not taurine, could stimulate Na+-Ca2+ exchanger activity. Yet, the studies by Schaffer et al. 30 did not address the possibility that taurine might function as a general modulator of insulin action.

Keywords

Insulin Action Taurine Level Sarcolemmal Membrane Exchanger Activity Sarcolemmal Vesicle 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1996

Authors and Affiliations

  • Stephen W. Schaffer
    • 1
  • Khanh Nguyen
    • 1
  • Cherry Ballard
    • 1
  • Nichelle Gardner
    • 1
  • Junichi Azuma
    • 2
  1. 1.Department of Pharmacology, School of MedicineUniversity of South AlabamaMobileUSA
  2. 2.The Third Department of Internal MedicineOsaka University Medical SchoolYamada-oka, Suita-City, OsakaJapan

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