PMID: 9446707Apr 4, 1998Paper

Developmental changes in intracellular pH buffering power in smooth muscle

Pflügers Archiv : European journal of physiology
A J BullockS Wray

Abstract

Intracellular pH (pHi) is known to modulate contraction. Neonatal tissues can differ from adult tissue in contractile response to stimuli known to alter pHi e.g. hypoxia. Changes of pH are attenuated by buffering, thus any difference in buffering power (beta) between tissues could affect their functional response to pHi perturbation. Similarly the extent to which any extracellular pH (pHo) alteration is transmitted into a pHi change will also influence function. We have therefore determined the intrinsic beta and effect of pHo change on pHi in neonatal and adult ureteric, uterine and gastric smooth muscles using the pH-sensitive fluorophore carboxy-SNARF. beta was found to be similar in the three adult tissues, but there were significant differences between neonatal tissues. In contrast, we found little difference in the amount of pHi change produced by pHo change between neonatal and adult tissues from the same smooth muscle, but a difference between smooth muscles. These data highlight significant differences between smooth muscles and their developmental state, which may contribute to different degrees of protection when pH is perturbed.

Citations

Jul 27, 1999·The Journal of Physiology·J Larcombe-McDouallS Wray
May 1, 2007·Experimental Physiology·Susan Wray
Dec 1, 2005·Chemical Communications : Chem Comm·Zongren Zhang, Samuel Achilefu
Oct 14, 2014·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Hao-Syun ChouDean-Mo Liu
Oct 17, 2009·Chemical Reviews·Junyan Han, Kevin Burgess
Oct 17, 2017·The Journal of Physical Chemistry. B·Ankur A Awasthi, Prabhat K Singh

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