To determine the potential for differential release of islet amyloid polypeptide and insulin, we performed studies in Tat islet monolayer cultures under conditions known to impair regulated beta-cell secretion. In inhibiting concentrations of epinephrine or the absence of calcium, islet amyloid polypeptide was secreted through a constitutive pathway while insulin was not. These findings suggest a mechanism for persistent islet amyloid polypeptide secretion and amyloid accumulation when regulated insulin release is impaired as in Type 2 (non-insulin-dependent) diabetes mellitus and insulinomas.
机构:
CORNELL UNIV, NEW YORK STATE COLL VET MED, DEPT PHARMACOL, ITHACA, NY 14853 USACORNELL UNIV, NEW YORK STATE COLL VET MED, DEPT PHARMACOL, ITHACA, NY 14853 USA
WOLLHEIM, CB
;
SHARP, GWG
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机构:
CORNELL UNIV, NEW YORK STATE COLL VET MED, DEPT PHARMACOL, ITHACA, NY 14853 USACORNELL UNIV, NEW YORK STATE COLL VET MED, DEPT PHARMACOL, ITHACA, NY 14853 USA
机构:
CORNELL UNIV, NEW YORK STATE COLL VET MED, DEPT PHARMACOL, ITHACA, NY 14853 USACORNELL UNIV, NEW YORK STATE COLL VET MED, DEPT PHARMACOL, ITHACA, NY 14853 USA
WOLLHEIM, CB
;
SHARP, GWG
论文数: 0引用数: 0
h-index: 0
机构:
CORNELL UNIV, NEW YORK STATE COLL VET MED, DEPT PHARMACOL, ITHACA, NY 14853 USACORNELL UNIV, NEW YORK STATE COLL VET MED, DEPT PHARMACOL, ITHACA, NY 14853 USA