The role of endogenous opioids in the chlorpropamide alcohol flush.

Abstract:

:The response of plasma immunoreactive met-enkephalin (IR-met-enkephalin) to ethanol (8 g by mouth) after chlorpropamide (250 mg daily for 14 d) was studied in three groups of non-insulin dependent diabetics (a) six diabetics who showed chlorpropamide alcohol flush (CPAF) and in whom the reaction could be blocked by indomethacin, (b) five diabetics who showed CPAF but in whom the flush could not be blocked by indomethacin and (c) five diabetics who did not show CPAF. A rise in plasma IR-met-enkephalin was observed in all three groups. When the two groups of flushers were re-tested with the addition of an infusion of naloxone a rise in plasma IR-met-enkephalin was still demonstrated in both groups regardless of whether the flush was blocked by naloxone. Naloxone blocked the flush only in those six subjects whose flush could be blocked by indomethacin. In five subjects, all flushers, CPAF was tested using intravenous and oral ethanol in doses producing similar plasma ethanol levels. A facial flush was induced by both intravenous and oral ethanol. In three flushers, plasma IR-met-enkephalin levels were measured during CPAF testing with both intravenous and oral ethanol. None showed a rise in plasma IR-met-enkephalin after intravenous ethanol, despite the appearance of a facial flush, whereas all showed a rise after oral ethanol. We therefore conclude that CPAF is unlikely to be caused by a rise in plasma IR-met-enkephalin.

journal_name

Clin Endocrinol (Oxf)

journal_title

Clinical endocrinology

authors

Johnston C,Wiles PG,Medbak S,Bowcock S,Cooke ED,Pyke DA,Rees LH

doi

10.1111/j.1365-2265.1984.tb01386.x

subject

Has Abstract

pub_date

1984-11-01 00:00:00

pages

489-97

issue

5

eissn

0300-0664

issn

1365-2265

journal_volume

21

pub_type

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