THE CONTRIBUTION OF INOSITOL EXCHANGE TO AGONIST‐STIMULATED BREAKDOWN OF MYO‐ [2‐3H] INOSITOL‐LABELLED PHOSPHATIDYLINOSITOL IN MOUSE EXOCRINE PANCREAS

Publisher Website
Google Scholar
Abstract
Agonists stimulate the release of myo-inositol from phosphatidylinositol (PtdIns) labelled in vivo with myo-[2-3H] inositol. In the presence of lithium, which inhibits myo-inositol-1-phosphatase, the compound which accumulates following the breakdown of pre-labelled PtdIns is inositol-1-phosphate. This indicates that the agonist-stimulated release of the head group from this lipid is not the result of inositol exchange and is due to phosphodiesterase activity. The total amount of 3H-labelled compounds released from PtdIns in the presence and absence of lithium is the same, which indicates the labelled compounds which are released are not re-incorporated. Agonist-induced release of myo-[2-3H] inositol can be used as a reliable indication of PtdIns breakdown in the exocrine pancreas.

This publication has 10 references indexed in Scilit: